Title of Invention: Battery pack and electronic device and automobile
technical field
[One]
The present invention relates to a battery pack, and more particularly, to a battery pack having improved manufacturing efficiency and durability.
[2]
This application is a priority claim application for Korean Patent Application No. 10-2019-0125482 filed on October 10, 2019, and all contents disclosed in the specification and drawings of the application are incorporated herein by reference.
background
[3]
Currently commercialized secondary batteries include nickel cadmium batteries, nickel hydride batteries, nickel zinc batteries, and lithium secondary batteries. The self-discharge rate is very low and the energy density is high, attracting attention.
[4]
Such a lithium secondary battery mainly uses a lithium-based oxide and a carbon material as a positive electrode active material and a negative electrode active material, respectively. A lithium secondary battery includes an electrode assembly in which a positive electrode plate and a negative electrode plate to which the positive electrode active material and the negative electrode active material are respectively applied with a separator interposed therebetween, and a cylindrical battery can for sealingly housing the electrode assembly together with an electrolyte as an exterior material.
[5]
In recent years, secondary batteries have been widely used not only in small devices such as portable electronic devices, but also in medium and large devices such as automobiles and power storage devices. When used in such a medium-large device, a large number of secondary batteries are electrically connected to increase capacity and output.
[6]
On the other hand, in recent years, as the need for a large-capacity structure including use as an energy storage source increases, a plurality of secondary batteries electrically connected in series and/or in parallel, and a module case and battery management system (BMS) accommodating these secondary batteries therein Demand for battery packs with
[7]
In addition, it is common for such a battery pack to further include an external housing made of a metal material to protect the plurality of secondary batteries from external shocks or to store and store the plurality of secondary batteries separately from the module case. And, the module case accommodated in the outer housing needs to be coupled and fixed inside the outer housing so that there is no internal flow. This is to prevent secondary internal collision between internal components (module case, bus bar, secondary battery, etc.) of the battery pack or electrical short from occurring when an external shock occurs.
[8]
However, in the prior art, during the process of inserting the battery module into the inner space of the outer housing of the battery pack, the inside of the outer housing is cramped, a collision between the battery module accommodated therein and the outer housing occurs, and the configuration of the battery module This damage could happen.
[9]
In addition, if there is a gap between the coupling structure between the battery module and the external housing after assembly, frequent friction or collision between the external housings of the battery module may occur when the battery pack is used as a power source for a vehicle subject to frequent external shocks or vibrations. This could happen, and it became a factor that could cause damage to the internal components.
[10]
Accordingly, the process of inserting and fixing the battery module inside the outer housing is difficult and takes a considerable amount of time. As a result, the manufacturing cost of the battery pack is increased.
DETAILED DESCRIPTION OF THE INVENTION
technical challenge
[11]
Accordingly, an object of the present invention is to provide a battery pack having improved manufacturing efficiency and durability, which was devised to solve the above problems.
[12]
Other objects and advantages of the present invention may be understood by the following description, and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.
means of solving the problem
[13]
The battery pack according to the present invention for achieving the above object,
[14]
a battery module including a plurality of secondary batteries and a module case having an outer wall configured to form an internal space accommodating the plurality of secondary batteries; and
[15]
It has a box shape with an open top and a bottom and includes a pack housing having an intermediate housing having an outer wall configured to form an inner space for accommodating the module case,
[16]
At least one guide rail protruding inwardly in which the battery module is located to guide the insertion of the module case in the vertical direction is provided on the inner surface of the intermediate housing and extending long in the vertical direction;
[17]
At least one provided with at least one pressing protrusion protruding outwardly on the outer surface of the module case in the horizontal direction, extending in the vertical direction to be movable in the vertical direction on the guide rail, and protruding to press the guide rail The above guide protrusion is provided.
[18]
In addition, the guide rail is provided with at least one guide groove that is inserted in a shape corresponding to the outer shape of the guide protrusion in the protruding direction and extends in the vertical direction,
[19]
The compression protrusion may be configured to press the inner surface of the guide groove.
[20]
Furthermore, the guide projection has a left side or a right side, a front side, and a rear side,
[21]
The compression protrusion may be provided on any one or more of a left or right side, a front side, and a rear side of the guide protrusion.
[22]
In addition, a pressing protrusion protruding to press the guide protrusion may be provided on an inner surface of the guide groove of the guide rail.
[23]
Furthermore, the pressing protrusion may be formed at a position corresponding to the pressing protrusion so as to be in close contact with the outer surface of the pressing protrusion on the inner surface of the guide groove.
[24]
In addition, a stopper having a plate shape extending in a horizontal direction may be provided to limit the vertical movement of the module case provided on the guide rail.
[25]
Furthermore, the module case may include a bumper portion positioned to face the intermediate housing and protruding outward from the outer surface of the outer wall to absorb external impact.
[26]
And, the bumper part,
[27]
an extension part protruding outwardly from the outer wall of the module case; and
[28]
and a plate-shaped part bent and extended in a direction corresponding to the outer wall of the module case from the end of the extension part in the extension direction,
[29]
A rib protruding outward and linearly extending in at least two directions may be provided on the outer surface of the plate-shaped part.
[30]
Furthermore, the electronic device according to the present invention for achieving the above object includes at least one battery pack.
[31]
In addition, the vehicle according to the present invention for achieving the above object includes at least one or more of the battery pack.
Effects of the Invention
[32]
According to one aspect of the present invention, in the present invention, at least one guide rail protruding in the inner direction where the battery module is located to guide the insertion of the module case in the vertical direction on the inner surface of the intermediate housing and extending in the vertical direction is provided. At least one pressing protrusion protruding to press the guide rail is provided on the outer surface of the module case in the horizontal direction, which protrudes outward to be movable in the vertical direction on the guide rail and extends in the vertical direction. By being provided with at least one or more guide protrusions, the present invention can eliminate a gap between the battery module and the pack housing.
[33]
In addition, according to one aspect of an embodiment of the present invention, the guide rail is provided with at least one guide groove that is inserted in a shape corresponding to the outer shape of the guide protrusion in the protruding direction and extends in the vertical direction, so that the battery module is installed in the pack housing. The battery module may be stably inserted without colliding with the inner wall of the pack housing while being inserted therein. Accordingly, it is possible to effectively prevent damage to the battery module that may occur during the assembly process with the pack housing.
[34]
And, according to another aspect of the present invention, the inner surface of the guide groove of the guide rail is provided with a pressing protrusion protruding to press the guide protrusion, thereby eliminating the clearance in the X-axis direction between the battery module and the intermediate housing. Accordingly, compared to the battery pack of FIG. 8 , it is possible to more effectively prevent damage and failure of the internal configuration of the battery pack that may occur during use of the battery pack.
[35]
Furthermore, according to another aspect of the present invention, a portion of the pressing protrusion is formed at a position corresponding to the pressing projection so as to be in close contact with the outer surface of the pressing projection on the inner surface of the guide groove, whereby the guide groove and the guide projection are more closely and firmly coupled can be According to the present invention, it is possible to prevent damage and failure of the internal configuration of the battery pack that may occur during use of the battery pack.
[36]
In addition, according to another aspect of the present invention, a stopper having a plate shape extending in the horizontal direction is provided on the upper portion of the guide rail to limit the vertical movement of the module case, so that the Z-axis direction of the battery module and the pack housing is The gap can be effectively eliminated. Accordingly, it is possible to prevent the vertical movement of the internal components of the battery pack, thereby preventing damage and failure of the internal components of the battery pack that may occur during use of the battery pack.
Brief description of the drawing
[37]
The following drawings attached to this specification illustrate preferred embodiments of the present invention, and serve to further understand the technical spirit of the present invention together with the detailed description of the present invention to be described later, so the present invention is described in such drawings should not be construed as being limited to
[38]
1 is a perspective view schematically illustrating a battery pack according to an embodiment of the present invention.
[39]
2 is an exploded perspective view schematically illustrating a state in which some components of a battery pack are separated according to an embodiment of the present invention.
[40]
3 is a cross-sectional view schematically illustrating the configuration of a can-type secondary battery according to an embodiment of the present invention.
[41]
4 is a perspective view schematically illustrating a state of a battery module of a battery pack according to an embodiment of the present invention.
[42]
5 is a perspective view schematically illustrating a state of an intermediate housing that is a part of a battery pack according to an embodiment of the present invention.
[43]
FIG. 6 is a partial perspective view schematically illustrating an enlarged state of a region D of the battery module of FIG. 4 .
[44]
7 is a plan view schematically illustrating the appearance of some components of a battery pack according to an embodiment of the present invention.
[45]
8 is a partial plan view schematically illustrating an enlarged view of a region E of some components of the battery pack of FIG. 7 .
[46]
9 is a partial plan view schematically illustrating a portion of a battery pack according to another embodiment of the present invention.
[47]
10 is a plan view schematically illustrating the appearance of some components of a battery pack according to another embodiment of the present invention.
[48]
11 is a partial vertical cross-sectional view schematically illustrating a part of the battery pack cut along line CC′ of FIG. 10 .
[49]
12 is a partial vertical cross-sectional view schematically illustrating a cut-away state of a battery pack according to another embodiment of the present invention.
Modes for carrying out the invention
[50]
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, the terms or words used in the present specification and claims should not be construed as being limited to their ordinary or dictionary meanings, and the inventor should properly understand the concept of the term in order to best describe his invention. Based on the principle that it can be defined, it should be interpreted as meaning and concept consistent with the technical idea of ​​the present invention.
[51]
Therefore, the configuration shown in the embodiments and drawings described in the present specification is only the most preferred embodiment of the present invention and does not represent all of the technical spirit of the present invention, so at the time of the present application, various It should be understood that there may be equivalents and variations.
[52]
[53]
1 is a perspective view schematically illustrating a battery pack according to an embodiment of the present invention. 2 is an exploded perspective view schematically illustrating a state in which some components of a battery pack are separated according to an embodiment of the present invention. 3 is a cross-sectional view schematically illustrating the configuration of a can-type secondary battery according to an embodiment of the present invention.
[54]
1 to 3 , the battery pack 300 of the present invention includes a battery module 200 and a pack housing 310 .
[55]
The battery module 200 may include a plurality of secondary batteries 100 , a module case 210 , and a bus bar 220 .
[56]
Here, the plurality of secondary batteries 100 may be can-type secondary batteries 100 . The secondary battery 100 may include an electrode assembly 110 , a battery can 112 , and a cap assembly 113 .
[57]
The electrode assembly 110 may have a structure wound with a separator interposed between the positive electrode plate and the negative electrode plate, and the positive electrode tab 114 is attached to the positive electrode plate to be connected to the cap assembly 113 , and the negative electrode tab is provided to the negative electrode plate A 115 may be attached and connected to the lower end of the battery can 112 .
[58]
The battery can 112 may have an empty space therein to accommodate the electrode assembly 110 . In particular, the battery can 112 may be cylindrical or prismatic, and may have an open top. In addition, the battery can 112 may be made of a metal material such as steel or aluminum to secure rigidity. In addition, the battery can 112 may have a negative electrode tab attached to a lower end thereof, so that the battery can 112 itself may function as the negative electrode terminal 111b as well as the lower portion of the battery can 112 .
[59]
The cap assembly 113 may be coupled to the upper open portion of the battery can 112 to seal the open end of the battery can 112 . The cap assembly 113 may have a circular or prismatic shape depending on the shape of the battery can 112, and includes sub-configurations such as a top cap (C1), a safety vent (C2), and a gasket (C3). may include
[60]
Here, the top cap C1 may be positioned at the top of the cap assembly 113 and configured to protrude upward. In particular, the top cap C1 may function as the positive electrode terminal 111a in the secondary battery 100 . Accordingly, the top cap C1 may be electrically connected to another secondary battery 100 , a load, or a charging device through an external device, for example, the bus bar 220 . The top cap C1 may be formed of, for example, a metal material such as stainless steel or aluminum.
[61]
The safety vent C2 may be configured to deform when the internal pressure of the secondary battery 100 , that is, the internal pressure of the battery can 112 increases to a certain level or more. In addition, the gasket C3 may be made of a material having electrical insulation so that the edge portions of the top cap C1 and the safety vent C2 may be insulated from the battery can 112 .
[62]
Meanwhile, the cap assembly 113 may further include a current blocking member C4. The current interrupting member C4 is also called a CID (Current Interrupt Device), and when the internal pressure of the battery increases due to gas generation and the shape of the safety vent C2 is reversed, between the safety vent C2 and the current interrupting member C4 is broken or the current blocking member C4 is damaged, the electrical connection between the safety vent C2 and the electrode assembly 110 may be blocked.
[63]
Since the configuration of the secondary battery 100 is widely known to those skilled in the art at the time of filing the present invention, a more detailed description will be omitted herein. In addition, although an example of the secondary battery 100 is illustrated in FIG. 3 , the battery module 200 according to the present invention is not limited to the configuration of the secondary battery 100 having a specific shape. That is, various secondary batteries 100 known at the time of filing of the present invention may be employed in the battery module 200 according to the present invention.
[64]
Furthermore, although the secondary battery 100 of FIG. 3 is illustrated based on the cylindrical secondary battery 100 , a prismatic secondary battery may be applied to the battery module 200 according to the present invention.
[65]
Again, referring to FIG. 2 , the plurality of secondary batteries 100 may be arranged in a left-right direction (X-axis direction) and an up-down direction (Z-axis direction). For example, as shown in FIG. 2 , the plurality of secondary batteries 100 may be arranged in a vertical direction and a horizontal direction. Moreover, the plurality of secondary batteries 100 may be arranged in a form in which tubular portions of the cylindrical battery can ( 112 in FIG. 3 ) face each other.
[66]
In particular, in the battery module 200 according to the present invention, the plurality of secondary batteries 100 may be configured to be laid down in a horizontal direction (Y-axis direction). Here, the horizontal direction means a direction parallel to the ground. That is, as shown in FIG. 2 , each of the 112 secondary batteries 100 may be configured to be elongated in the front-rear direction. In this case, when the entire secondary battery 100 is viewed in the direction F of FIG. 1 , the positive terminal 111a and the negative terminal 111b may be positioned in each of the front and rear directions.
[67]
Meanwhile, terms indicating directions such as before, after, left, right, up, and down described in the present specification may vary depending on the position of the observer or the placed shape of the object. However, in the present specification, for convenience of explanation, directions such as front, rear, left, right, top, and bottom are separately indicated with reference to the time when viewed in the F direction.
[68]
4 is a perspective view schematically illustrating a state of a battery module of a battery pack according to an embodiment of the present invention.
[69]
Referring to FIG. 4 together with FIG. 2 , the module case 210 may include a first case 217 and a second case 219 . The first case 217 may be configured such that the second case 219 is stacked on the rear side. For example, as shown in FIG. 2 , when viewed from the Y-axis direction, the battery module 200 includes the first case 217 and the second case 217 located at the rear of the first case 217 . A case 219 may be provided. A hollow H1 configured to insert a portion of the secondary battery 100 may be formed in each of the first case 217 and the second case 219 .
[70]
In addition, the module case 210 may include an outer wall 211 configured to form an inner space accommodating the plurality of secondary batteries 100 .
[71]
The outer wall 211 may be formed to surround an inner space formed therein to insert and receive the plurality of secondary batteries 100 . In addition, the module case 210, when viewed in the F direction in FIG. 1, is formed in the front, rear, up, down, left, right directions to form an inner space, the front wall (211c1), the rear wall (211c2) , an upper wall 211c3 , a lower wall 211c4 , a left wall 211c5 , and a right wall 211c6 may be provided. For example, as shown in FIG. 4 , the module case 210 includes a front wall 211c1 , a rear wall 211c2 , an upper wall 211c3 , a lower wall 211c4 , a left wall 211c5 , and a right wall 211c6 . can be provided.
[72]
Therefore, according to this configuration of the present invention, the module case 210 can effectively protect the plurality of secondary batteries 100 accommodated therein from external impact by having the outer wall 211 .
[73]
In addition, at least two or more secondary batteries 100 may be accommodated in the inner space of the module case 210 in a horizontally (Y-axis direction) form. The stacking direction is not necessarily limited to one direction, and may be an up-down direction (Z-axis direction) according to a direction in which the secondary battery 100 is laid down.
[74]
Therefore, according to this configuration of the present invention, since the side exposure of the secondary battery 100 is blocked by the module case 210, the insulation of the secondary battery 100 is improved, and the secondary battery 100 is protected from external physical and chemical elements. The battery 100 may be protected.
[75]
On the other hand, referring back to FIG. 4 together with FIG. 2 , the bus bar 220 is disposed between the plurality of secondary batteries 100 , for example, between all secondary batteries 100 , or between some of the secondary batteries 100 . can be electrically connected. To this end, at least a portion of the bus bar 220 may be made of an electrically conductive material. For example, the bus bar 220 may be made of a metal material such as copper, aluminum, nickel, or the like. Furthermore, the bus bar 220 may have a structure in which two plates using different main materials are joined. For example, the bus bar 220 may have a form in which a bus bar plate made of a nickel material and a bus bar plate made of a copper main material are joined.
[76]
In particular, in the present invention, the bus bar 220 may include a body portion 222 and a connection portion 224 as shown in FIG. 2 .
[77]
The body portion 222 of the bus bar 220 may be formed in a plate shape. Moreover, the bus bar 220 may be configured in the form of a metal plate to ensure rigidity and electrical conductivity. In particular, the main body 222 may be configured to be erected in the vertical direction (the Z-axis direction in the drawing) along the electrode terminals 111 of the plurality of secondary batteries 100 .
[78]
The connection part 224 may be configured to contact the electrode terminals 111 of the plurality of secondary batteries 100 . In this case, the connection part 224 may be welded to the electrode terminal 111 . The connection part 224 may be formed by extending a portion from the body part 222 .
[79]
That is, in the present invention, the plurality of secondary batteries 100 are laid down long in the front-rear direction (Y-axis direction in the drawing) in the left-right direction (X-axis direction in the drawing) and/or in the vertical direction (Z-axis direction in the drawing). They may be stacked on each other and arranged. At this time, the main body 222 is a plate-like shape that extends flat in the left and right and up and down directions according to the arrangement direction of the electrode terminals 111 of the plurality of secondary batteries 100 and is erected with respect to the ground. can
[80]
Furthermore, the left and right sides of the main body 222 of the bus bar 220 may be provided with external terminals 223 for sensing a voltage by a sensing member (not shown) or for transmitting power to the outside.
[81]
In addition, the bus bar 220 may contact the same polarity of the plurality of secondary batteries 100 and electrically connect them in parallel. Alternatively, the bus bar 220 may contact the electrode terminals 111 of some of the secondary batteries 100 and electrically connect them in parallel and in series.
[82]
Furthermore, an electrically insulating insulating sheet 370 may be provided on the outer surface of the bus bar 220 . For example, as shown in FIG. 2 , each of the two insulating sheets 370 may be provided on the front side of the bus bar located on the front side and the rear side of the bus bar located on the front side, respectively.
[83]
Meanwhile, again referring to FIGS. 1 and 2 , the pack housing 310 may include an upper cover 312 , an intermediate housing 314 , and a lower support portion 316 . Specifically, when viewed in the F direction, the intermediate housing 314 may be coupled to a lower portion of the upper cover 312 , and the lower support portion 316 may be coupled to a lower portion of the intermediate housing 314 . . More specifically, the top cover 312 may have an upper wall and a side wall to cover the upper portion of the module case 210 accommodated in the pack housing 310 . In addition, the intermediate housing 314 may have a rectangular tubular shape in which upper and lower portions are open. Furthermore, the lower support part 316 is a box shape with an open top, and may include a side wall and a lower wall.
[84]
5 is a perspective view schematically illustrating a state of an intermediate housing that is a part of a battery pack according to an embodiment of the present invention.
[85]
Referring back to FIG. 5 together with FIG. 2 , the intermediate housing 314 may have a sealed box shape in which an inner space is formed to accommodate the module case 210 therein. Specifically, the intermediate housing 314 may include an outer wall 311 configured to form the inner space. The pack housing 310 may be formed by extrusion molding an aluminum alloy. In particular, the intermediate housing 314 may be formed by extruding an aluminum alloy material in the vertical direction.
[86]
Specifically, at least one guide rail 313 may be provided on the inner surface 310a of the intermediate housing 314 to guide the vertical insertion of the module case 210 . In addition, the guide rail 313 may have a shape extending long in the vertical direction and protruding inward in which the battery module 200 is located.
[87]
For example, as shown in FIG. 5 , the guide rail 313 provided on the inner surface 310a of the intermediate housing 314 is vertically disposed on the left inner surface and the right inner surface of the intermediate housing 314 in the vertical direction. It may have an elongated shape. The guide rail 313 formed on the left inner surface of the intermediate housing 314 has a shape protruding in the right direction, and the guide rail 313 formed on the right inner surface of the intermediate housing 314 has a shape that protrudes in the left direction. can have
[88]
FIG. 6 is a partial perspective view schematically illustrating an enlarged state of a region D of the battery module of FIG. 4 .
[89]
Referring back to FIGS. 4 and 6 , at least one guide protrusion 214 may be provided on the outer surface of the module case 210 in the horizontal direction. Specifically, the guide protrusion 214 may have a shape that protrudes outward and extends in the vertical direction so as to be slidably movable in the vertical direction on the guide rail 313 .
[90]
For example, as shown in FIG. 5 , on each of the left and right walls of the module case 210 , the guide rails 313 provided on the left and right inner surfaces of the intermediate housing 314 ride up and down in the vertical direction. A guide projection 214 configured to be movable may be provided. The guide protrusion 214 may have a vertical length corresponding to a vertical length of the guide rail 313 . In addition, the guide protrusion 214 may be formed by combining a portion of each of the first case 217 and the second case 219 into one. The guide protrusion 214 may have a macroscopically elongated rectangular parallelepiped shape in the vertical direction.
[91]
In addition, at least one compression protrusion P1 protruding to press the guide rail 313 may be provided on the guide protrusion 214 . Specifically, the compression protrusion P1 may be a protrusion protruding from the outer surface of the guide protrusion 214 in a direction in which the guide rail 313 is located. The shape of the compression protrusion P1 may be, for example, a combination of any one or more of a hemispherical shape, a quadrangular truncated pyramid, a quadrangular prism, and a cylindrical prism. It is not limited to any one shape, and the pressing protrusion P1 compresses the outer surface of the guide protrusion 214 to eliminate the play between the guide protrusion 214 and the guide rail 313 . It can be applied to ramen noodles.
[92]
Therefore, according to this configuration of the present invention, the inner surface 310a of the intermediate housing 314 protrudes in the inner direction where the battery module 200 is located to guide the insertion of the module case 210 in the vertical direction. At least one guide rail 313 elongated in the vertical direction is provided, and on the outer surface of the module case 210 in the horizontal direction, it protrudes outward so as to be movable in the vertical direction on the guide rail 313 , At least one guide protrusion 214 having a shape extending in the vertical direction and having at least one pressing protrusion P1 protruding to press the guide rail 313 is provided, so that the present invention is the battery module It is possible to eliminate a gap between the 200 and the pack housing 310 .
[93]
Furthermore, the present invention solves the problems of the prior art by providing the pressing protrusion P1 on the guide protrusion 214 that can eliminate the gap between the battery module 200 and the pack housing 310 . . That is, according to the present invention, it is possible to prevent damage and failure of the internal configuration of the battery pack 300 that may occur during use of the battery pack 300 from occurring. Moreover, when an internal defect of the battery pack 300 occurs during the production process, since separation and reassembly are possible, the defect rate can be minimized.
[94]
7 is a plan view schematically illustrating the appearance of some components of a battery pack according to an embodiment of the present invention. And, FIG. 8 is a partial plan view schematically showing an enlarged view of region E of some components of the battery pack of FIG. 7 .
[95]
7 and 8 together with FIGS. 5 and 6 , the guide rail 313 may include at least one guide groove H2 . In detail, the guide groove H2 may have a shape corresponding to the outer shape of the guide protrusion 214 in the protruding direction. For example, as shown in FIG. 8 , the guide groove H2 inserted in the inner direction of the body of the guide rail 313 may be provided on the outer surface of the guide rail 313 in the protruding direction in the horizontal direction. can
[96]
The guide groove H2 may have a left inner surface or a right inner surface, a rear inner surface, and a front inner surface. The guide protrusion 214 may be inserted to face the left or right inner surface, the rear inner surface, and the front inner surface of the guide groove H2 .
[97]
In addition, the pressing protrusion P1 may be configured to press the inner surface of the guide groove H2. For example, as shown in FIG. 8 , the compression protrusion P1 may be formed on an outer surface (left surface) of the guide protrusion 214 in the protruding direction. The compression protrusion P1 serves to eliminate play in the left-right direction (X-axis direction) between the guide groove H2 and the guide protrusion 214 of each of the pack housing 310 and the battery module 200 . can be performed.
[98]
In addition, as shown in FIGS. 5 and 6 , other types of compression protrusions P2 may be formed on the front and rear surfaces of the guide protrusion 214 in the Y-axis direction of FIG. 2 . This other type of pressing protrusion P2 is in the left and right direction between the guide groove H2 and the guide protrusion 214 of each of the pack housing 310 and the battery module 200 (the Y-axis direction in FIG. 2 ). It can play a role in eliminating gaps in
[99]
Therefore, according to this configuration of the present invention, the guide rail 313 has at least one guide groove H2 that is inserted in a shape corresponding to the outer shape of the guide protrusion 214 in the protruding direction and extends in the vertical direction. By being provided, the battery module 200 may be stably inserted without colliding with the inner wall of the pack housing 310 while the battery module 200 is inserted into the pack housing 310 . Accordingly, it is possible to effectively prevent damage to the battery module 200 that may occur during the assembly process with the pack housing 310 .
[100]
Furthermore, in the present invention, the compression protrusion P1 is configured to press the inner surface of the guide groove H2, so that the guide groove H2 of each of the pack housing 310 and the battery module 200 and the A gap between the guide protrusions 214 in the X-axis direction and the Y-axis direction can be effectively eliminated. Accordingly, it is possible to prevent damage and failure of the internal configuration of the battery pack 300 that may occur during use of the battery pack 300 from occurring.
[101]
9 is a partial plan view schematically illustrating a portion of a battery pack according to another embodiment of the present invention.
[102]
Referring back to FIG. 9 together with FIG. 2 , the guide groove H2 of the guide rail 313A of FIG. 9 is compared with the guide groove H2 of the guide rail 313 of FIG. A pressing protrusion (P3) protruding to the may be further provided. The pressing protrusion P3 may be configured to press the outer surface of the guide protrusion 214 . The pressing protrusion P3 may have a linearly extending shape in the vertical direction along the guide groove H2.
[103]
For example, a guide rail 313A is provided on each of the left and right inner surfaces of the pack housing 310 , and a guide groove H2 is formed in each of the two guide rails 313A, and the two A pressing protrusion P3 may be provided in each of the guide grooves H2.
[104]
Therefore, according to this configuration of the present invention, the inner surface of the guide groove (H2) of the guide rail (313A) is provided with a pressing protrusion (P3) protruding to press the guide projection (214), the battery module (200) ) and the intermediate housing 314 in the X-axis direction can be eliminated. Accordingly, as compared to the battery pack of FIG. 8 , it is possible to more effectively prevent damage and failure of the internal configuration of the battery pack 300 that may occur during use of the battery pack 300 from occurring.
[105]
In addition, a portion of the pressing protrusion P3 may be formed at a position corresponding to the pressing protrusion P1 so as to be in close contact with the outer surface of the pressing protrusion P1 on the inner surface of the guide groove H2 . For example, as shown in FIG. 9 , a portion of the pressing protrusion P3 may be sandwiched between the two pressing protrusions P1 . However, it is not necessarily limited to this structure, and the pressing protrusion P1 may be configured to be sandwiched between the two pressing protrusions P3 .
[106]
Accordingly, according to this configuration of the present invention, a portion of the pressing protrusion P3 is located on the inner surface of the guide groove H2 so as to be in close contact with the outer surface of the pressing protrusion P1 at a position corresponding to the pressing protrusion P1. By forming in the , the guide groove (H2) and the guide protrusion 214 can be more closely and firmly coupled. Accordingly, as compared to the battery pack 300 of FIG. 8 , it is more effective to prevent damage and failure of the internal configuration of the battery pack 300 that may occur during use of the battery pack 300 from occurring. can
[107]
10 is a plan view schematically illustrating the appearance of some components of a battery pack according to another embodiment of the present invention. And, FIG. 11 is a partial vertical cross-sectional view schematically showing a part of the battery pack cut along line CC' of FIG. 10 .
[108]
10 and 11 , the battery pack 300A according to another embodiment of the present invention includes a stopper configured to limit the vertical movement of the module case 210 on the upper portion of the guide rail 313 ( 320) may be provided. The stopper 320 may have a plate shape extending in a horizontal direction. The stopper 320 may be configured such that a portion of the plate shape presses the upper portion of the guide protrusion 214 of the module case 210 . The stopper 320 may be bolted to the upper portion of the guide rail 313 using a bolt T1 . To this end, a bolt groove for inserting the bolt T1 is formed in the stopper 320 , and a bolt groove H4 extending in the vertical direction may also be formed on the upper portion of the guide rail 313 .
[109]
For example, referring to FIGS. 4 and 10 , a stopper 320 may be provided at the top of the guide rail 313 provided on each of the left and right inner surfaces of the pack housing 310 . Each of the two stoppers 320 may be bolted to an upper end of the guide rail 313 . In addition, each of the two stoppers 320 may be configured to press the top surface of the guide protrusion 214 provided on each of the left and right walls 211c5 and 211c6 of the module case 210 in a downward direction.
[110]
Therefore, according to this configuration of the present invention, a stopper 320 having a plate shape extending in the horizontal direction to limit the vertical movement of the module case 210 is provided on the upper portion of the guide rail 313 , It is possible to effectively eliminate the gap between the battery module 200 and the pack housing 310 in the Z-axis direction. Accordingly, by preventing the vertical flow of the internal components of the battery pack 300A, damage and failure of the internal components of the battery pack 300A that may occur during use of the battery pack 300A are prevented from occurring. can be prevented
[111]
12 is a partial vertical cross-sectional view schematically illustrating a cut-away state of a battery pack according to another embodiment of the present invention.
[112]
Referring to FIG. 12 together with FIG. 10 , the guide rail 313B of FIG. 12 has a bolt groove H4 provided at the upper end of the guide rail 313B, compared to the guide rail 313 of FIG. 11 . A convex portion B1 may be further formed therein. The convex portion B1 may have a shape protruding in a direction in which the body of the bolt T1 is located.
[113]
In addition, the outer surface (the inner surface of the guide groove) at a position corresponding to the convex part B1 of the guide rail 313B is the bolt T1 and the convex part B1 inserted into the bolt groove H4. It may have a shape that is convexly deformed in the outward direction. The deformed portion of the guide rail 313B may be a partial inner surface 313a1 of the guide groove H2. The inner surface 313a1 convexly deformed outwardly of the guide groove H2 may be configured to press the outer surface of the guide protrusion 214 . Accordingly, in the guide groove H2 deformed of the guide rail 313B, the guide protrusion 214 and the inner surface 313a1 of the guide groove H2 may be in close contact with each other without clearance in the X-axis direction.
[114]
Accordingly, according to this configuration of the present invention, in the present invention, a convex portion B1 is formed inside the bolt groove H4 provided at the upper end of the guide rail 313B, and a bolt ( T1) is inserted, the inner surface 313a1 of the guide groove H2 protruding inward by the bolt coupling can be configured to press the outer surface of the guide protrusion 214, the battery module 200 and The clearance in the X-axis direction between the central housings 314 can be effectively reduced. Accordingly, durability of the battery pack 300 may be effectively increased.
[115]
Referring back to FIGS. 4, 5, and 6 , the module case 210 may include a bumper 240 to absorb an external shock applied to the battery module 200 . Specifically, the bumper 240 may be formed at a position to face the intermediate housing 314 of the outer wall 211 of the module case 210 . The bumper 240 may have a shape protruding outward from the outer surface of the outer wall 211 . For example, as shown in FIGS. 4 and 5 , the bumper 240 may be formed on each of the left and right walls 211c5 and 211c6 of the module case 210 .
[116]
For example, as shown in FIG. 4 , nine bumper units 240 protruding from the right wall 211c6 of the module case 210 to the right may be formed. Also, although not shown in the drawing, nine bumper units 240 protruding from the left wall 211c5 of the module case 210 to the left may be formed.
[117]
In addition, the bumper 240 may be configured such that a separation space is formed between the outer walls 311 of the intermediate housing 314 . That is, the bumper 240 may have a space spaced apart from the outer wall 311 of the intermediate housing 314 by a predetermined distance. For example, each of the nine bumper units 240 provided on the right wall 211c6 of the module case 210 may have a predetermined separation space spaced apart from the outer wall 311 of the intermediate housing 314 . In addition, nine bumper units 240 protruding from the right wall 211c6 of the module case 210 to the right may be formed. Furthermore, each of the bumper units 240 provided on the right wall 211c6 of the module case 210 may have a spaced apart space from the outer wall 311 of the intermediate housing 314 .
[118]
At this time, the bumper unit 240 secures a separation distance from the outer wall 311 of the module case 210 , so that the external shock applied to the battery module 200 is directly transmitted to the built-in secondary battery 100 . Instead, the bumper 240 preferentially collides with the outer wall 311 to destroy the bumper 240 , thereby absorbing more external shock.
[119]
Therefore, according to this configuration of the present invention, the module case 210 is provided with a bumper unit 240 configured to absorb an external shock applied to the battery module 200 , thereby causing an external shock to the battery module 200 . When this occurs, the secondary battery 100 built in the module case 210 can be protected by absorbing the shock while the bumper part 240 is destroyed. Accordingly, the stability of the battery module 200 may be improved.
[120]
In addition, the bumper 240 may have an extension part 242 and a plate-shaped part 245 . Here, the extension part 242 may have a shape that protrudes outwardly from the outer wall 311 of the module case 210 .
[121]
In addition, the plate-shaped part 245 may be bent and extended in a direction corresponding to the outer wall 211 of the module case 210 from the end of the extension part 242 in the extending direction.
[122]
Furthermore, in the plate-shaped part 245 , a linear rib R2 may be formed on an outer surface of the plate-shaped part 245 . Specifically, the rib R2 may have a shape that protrudes outward and linearly extends in at least two directions. For example, as shown in FIG. 6 , the linear ribs R2 are linear extending in the left-right direction (X-axis direction) and the vertical direction (Z-axis direction) when viewed from the F direction of FIG. 1 . The ribs R2 may have a lattice shape in which they cross each other. In addition, the ribs R2 may have a shape extending in a lattice shape.
[123]
Accordingly, according to this configuration of the present invention, the bumper 240 is formed on the outer surface of the plate-shaped part 245 by forming the ribs R2 protruding outward and extending linearly, the bumper 240 It is possible to effectively reduce the weight or material cost increase of the module case 210 due to the additional configuration while maintaining proper rigidity.
[124]
Moreover, the rib R2 may serve as a relatively fragile and fragile region, thereby exhibiting an excellent function in absorbing shock. For this reason, the stability of the battery module 200 may be improved. Furthermore, the space formed by the rib R2 may be used as a free space that can effectively absorb the external impact transmitted to the plate-shaped part 245 .
[125]
In addition, the bumper 240 may be provided with a slide groove H3 configured to slide in the vertical direction by inserting the rail post 314p provided on the inner wall of the intermediate housing 314 . Through the slide groove H3 , the battery module 200 of the present invention can be stably inserted into the intermediate housing 314 without collision or interference.
[126]
Meanwhile, the battery pack 300 according to an embodiment of the present invention may include at least one or more of the battery modules 200 . In addition, the battery pack 300 includes various devices (not shown) for controlling the charging and discharging of the battery module 200, for example, a BMS (FIG. 2, 380, Battery Management System), a current sensor, a fuse, and the like. may be included.
[127]
Meanwhile, an electronic device (not shown) according to an embodiment of the present invention includes at least one or more of the above-described battery packs 300 . The electronic device may further include a device housing (not shown) having an accommodation space for accommodating the battery module 200 and a display unit through which the user can check the charging state of the battery module 200 .
[128]
Also, the battery pack 300 according to an embodiment of the present invention may be included in a vehicle such as an electric vehicle or a hybrid vehicle. That is, in a vehicle according to an embodiment of the present invention, at least one or more battery packs 300 according to the embodiment of the present invention described above may be mounted in a vehicle body.
[129]
Meanwhile, in this specification, terms indicating directions such as up, down, left, right, front, and back are used, but these terms are for convenience of explanation only, and may vary depending on the position of the object or the position of the observer. It will be apparent to those skilled in the art that the present invention can.
[130]
[131]
As described above, although the present invention has been described with reference to limited embodiments and drawings, the present invention is not limited thereto, and the technical idea of ​​the present invention and the following by those skilled in the art to which the present invention pertains. Of course, various modifications and variations are possible within the scope of equivalents of the claims to be described.
[132]
[Explanation of code]
[133]
300: battery pack
[134]
100: secondary battery 200: battery module
[135]
210: module case
[136]
111, 111a, 111b: electrode terminal, positive terminal, negative terminal
[137]
211: outer wall
[138]
310: pack housing 311: outer wall
[139]
313: guide rail 214: guide projection
[140]
P1, P2: Pressing projection H2: Guide groove
[141]
P3: pressure projection 320: stopper
[142]
312: top cover
[143]
314: middle housing 313: bottom support
[144]
240: bumper part 242: extension part
[145]
245: plate part H4: bolt groove
[146]
R2: Rib
Industrial Applicability
[147]
The present invention relates to a battery pack. Further, the present invention is applicable to electronic devices including the above battery packs and to the automotive industry.
Claims
[Claim 1]
a battery module including a plurality of secondary batteries and a module case having an outer wall configured to form an internal space accommodating the plurality of secondary batteries; and a pack housing having an upper and lower open box shape and having an outer wall configured to form an inner space for accommodating the module case, wherein the inner surface of the intermediate housing has a vertical direction of the module case At least one guide rail that protrudes inwardly where the battery module is located and extends long in the vertical direction to guide the insertion of the module case is provided on the outer surface of the module case in the horizontal direction and protrudes outward and rides the guide rail A battery pack comprising at least one guide protrusion extending in the vertical direction to be movable in the vertical direction and provided with at least one pressing protrusion protruding to press the guide rail.
[Claim 2]
The guide rail according to claim 1, wherein the guide rail is provided with at least one guide groove that is inserted in a shape corresponding to the outer shape of the guide protrusion in the protruding direction and extends in the vertical direction, and the pressing protrusion presses the inner surface of the guide groove. A battery pack, characterized in that configured to.
[Claim 3]
The method of claim 2, wherein the guide protrusion has a left side or a right side, a front side, and a rear side, and the pressing protrusion is provided on any one or more of a left side or a right side, a front side, and a rear side of the guide protrusion battery pack, characterized in that
[Claim 4]
The battery pack according to claim 2, wherein a pressing protrusion protruding to press the guide protrusion is provided on an inner surface of the guide groove of the guide rail.
[Claim 5]
The battery pack according to claim 4, wherein the pressing protrusion is formed at a position corresponding to the pressing protrusion so as to be in close contact with an outer surface of the pressing protrusion on an inner surface of the guide groove.
[Claim 6]
The battery pack according to claim 1, further comprising a stopper having a plate shape extending in a horizontal direction to limit a vertical movement of the module case provided on the guide rail.
[Claim 7]
The battery pack according to claim 1, wherein the module case is positioned to face the intermediate housing and includes a bumper portion protruding outward from an outer surface of the outer wall to absorb an external shock.
[Claim 8]
The method of claim 7, wherein the bumper part, an extension part that protrudes outwardly from the outer wall of the module case; and a plate-shaped part bent and extended in a direction corresponding to the outer wall of the module case from an end of the extension part in an extension direction, and a rib protruding outwardly and linearly extending in at least two directions or more on the outer surface of the plate-shaped part A battery pack, characterized in that provided.
[Claim 9]
An electronic device comprising at least one battery pack according to any one of claims 1 to 8.
[Claim 10]
A vehicle comprising at least one battery pack according to any one of claims 1 to 8.