Specification
Title of the invention: Battery module and battery pack including the same
Technical field
[One]
The present invention relates to a battery module and a battery pack including the same, and more specifically, is formed in a heat transfer structure so that temperatures of a plurality of battery cells are efficiently controlled, and a heat transfer member is formed through a hole so as to increase the stability of the battery cells. It relates to the formed battery module and a battery pack including the same.
[2]
Background
[3]
Lithium secondary batteries as a unit cell constituting a battery pack have flexibility, are relatively free in shape, are light in weight, and are excellent in safety, and thus demand is increasing as a power source for portable electronic devices such as mobile phones, camcorders, and notebook computers. In addition, lithium secondary batteries are widely used not only in small devices such as portable electronic devices, but also in mid- to large-sized devices such as automobiles and power storage devices.
[4]
Meanwhile, the shape of the secondary battery is classified according to the shape of the battery case. When the electrode assembly is embedded in a cylindrical or rectangular metal can, it is classified into a cylindrical battery and a rectangular battery. In addition, when the electrode assembly is embedded in a pouch-type case of an aluminum laminate sheet, it is classified as a pouch-type battery.
[5]
In addition, the electrode assembly built into the battery case is composed of a positive electrode, a negative electrode, and a separator structure inserted between the positive electrode and the negative electrode, so that charging/discharging is possible. In addition, the cylindrical electrode assembly is formed in a jelly-roll type in which a long sheet-shaped positive electrode, a separator, and a negative electrode coated with an electrode active material are sequentially stacked and wound.
[6]
Meanwhile, in general, when the battery pack is used for a long time, heat is generated from the battery pack. In particular, the stacked high-capacity battery packs carry more heat as the amount of current increases during charging or discharging. If the heat generated at this time is not sufficiently removed, the performance of the battery pack may deteriorate, and further, fire or explosion may occur.
[7]
In order to solve the above problem, the battery pack includes a cooling member. The battery pack including the cooling member will be described in detail with reference to FIG. 1.
[8]
1 is a structural diagram of a conventional battery pack.
[9]
Referring to FIG. 1, in a conventional battery pack, cooling members are disposed on each side of a plurality of cylindrical battery cells.
[10]
However, in the structure of the battery pack as described above, the space inside the battery pack is reduced as a plurality of cooling members are configured, and when the circular cell is driven, heat is generated at the top/bottom of the cell with electrode terminals rather than the side of the cell. A problem of decreasing efficiency occurs.
[11]
[Prior technical literature]
[12]
[Patent Literature]
[13]
(Patent Document 1) KR2017-0004172 A
[14]
Detailed description of the invention
Technical challenge
[15]
The present invention provides a battery module having more battery cells in the same space and increasing cooling efficiency, and a battery pack including the same.
[16]
Means of solving the task
[17]
A battery module according to an embodiment of the present invention is a battery module consisting of a plurality of battery cells, the upper frame for transferring heat generated from the plurality of battery cells, an upper heat dissipating member positioned under the upper frame, and the upper A battery cell assembly in which a plurality of battery cells are arranged adjacent to each other, with a structure in which a negative (-) pole is located on the upper side and a positive (+) pole is located on the lower side, and is located under the battery cell assembly. A lower heat dissipation member having a through hole formed at a position corresponding to the end of the positive (+) electrode terminal of each battery cell, and a coupling portion located under the lower heat dissipation member and connected to the upper frame to transfer heat from the upper frame It comprises a lower frame that receives or transfers heat to the upper frame.
[18]
The battery cell assembly may further include a cell fixing frame fixing the plurality of battery cells.
[19]
In the cell fixing frame, a heat dissipating member mounting groove having a predetermined depth is formed on an upper surface and a lower surface of the cell fixing frame so that the upper heat dissipating member and the lower heat dissipating member can be seated in position.
[20]
The battery module further includes a metal plate that contacts the upper and lower surfaces of the plurality of battery cells in the battery cell assembly to electrically connect the positive and negative terminals of the plurality of battery cells, respectively. .
[21]
In the metal plate, through holes are formed at positions corresponding to positive (+) electrode terminals and negative (-) electrode terminals of the plurality of battery cells.
[22]
A battery pack according to an embodiment of the present invention is a battery pack configured for thermal control between a plurality of battery modules composed of a plurality of battery cells, in which a positive (+) pole is located on an upper side and a negative (-) pole is located on the lower side. A first battery module unit formed in a structure in which a plurality of battery cells are accommodated in a heat transfer frame, a temperature control unit positioned under the first battery module unit to control temperatures of the plurality of battery cells, and a temperature control unit located below the temperature control unit And, a plurality of battery cells in which a negative (-) electrode is located on an upper side and a positive (+) electrode is located on a lower side are configured to include a second battery module unit formed in a structure in which the heat transfer frame is accommodated.
[23]
The first battery module unit includes a first upper heat transfer frame for discharging heat generated from the plurality of battery cells to the outside, and is positioned between the first upper heat transfer frame and a plurality of battery cells, and the amount of each battery cell A first upper radiating member having a through hole formed at a position corresponding to the end of the (+) electrode terminal, a first lower radiating member located under the plurality of battery cells, and a lower portion of the first lower radiating member and an upper portion of the temperature control unit And a first lower frame connected to the first upper heat transfer frame to transfer heat transferred from the first upper heat transfer frame to the temperature control unit or to receive heat from the temperature control unit.
[24]
The second battery module unit includes a second upper heat transfer frame positioned below the temperature control unit to receive heat from the temperature control unit or transfer heat generated from the plurality of battery cells to the temperature control unit, and the second upper portion A second upper heat dissipation member positioned between the heat transfer frame and the plurality of battery cells, and the through hole is formed at a position corresponding to the end of the positive (+) electrode terminal of each battery cell by being positioned below the plurality of battery cells. A second lower heat dissipating member and a second lower heat dissipating member located below the second lower heat dissipating member and connected to the second upper heat transfer frame to receive heat from the second upper heat transfer frame or to transfer heat to the second upper heat transfer frame It consists of 2 lower heat transfer frames.
[25]
The heat transfer frame of the first battery module part and the second battery module part further includes a temperature control part seating groove of a predetermined depth on a contact surface of the heat transfer frame in contact with the temperature control part so that the temperature control part is disposed inside the heat transfer frame. do.
[26]
The temperature controller is formed in a configuration in which a cooling member, a heating member, or a cooling member and a heating member are combined.
[27]
Effects of the Invention
[28]
The battery module and the battery pack including the same according to an embodiment of the present invention increase the cooling efficiency of the battery cell by arranging a heat dissipating member above and below the side of the battery cell, and the positive (+) terminal of the battery cell is arranged. A through hole is formed in the heat dissipating member so that the positive (+) electrode cap is opened when ignited so that gas, flame, and discharge can be ejected, thereby enabling safe driving of the battery module and battery pack.
[29]
Brief description of the drawing
[30]
1 is a structural diagram of a conventional battery pack.
[31]
2 is an exploded perspective view of a battery module according to an embodiment of the present invention.
[32]
3 is a side view of a battery module according to an embodiment of the present invention.
[33]
4 is an enlarged side view of a battery module according to an embodiment of the present invention.
[34]
5 is a flow chart of heat transfer of a battery module according to an embodiment of the present invention.
[35]
6 is an exemplary view of temperature change of a battery module according to an embodiment of the present invention.
[36]
7 is a side view of a battery pack according to an embodiment of the present invention.
[37]
8 is a flow chart of heat transfer by a cooling member in a battery pack according to an embodiment of the present invention.
[38]
9 is a flow chart of heat transfer by a heating member in a battery pack according to an embodiment of the present invention.
[39]
Best mode for carrying out the invention
[40]
Hereinafter, embodiments of the present invention will be described in detail with reference to the contents described in the accompanying drawings. However, the present invention is not limited or limited by the embodiments. The only embodiments are provided to complete the disclosure of the present invention, and to fully inform the scope of the invention to those of ordinary skill in the art.
[41]
Also, terms including ordinal numbers such as first and second may be used to describe various elements, but the elements are not limited by the terms. The terms are used only for the purpose of identifying one component from another component. For example, without departing from the scope of the present invention, a first component may be referred to as a second component, and similarly, a second component may be referred to as a first component. The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.
[42]
The terms used in the present invention have selected general terms that are currently widely used as possible while taking functions of the present invention into consideration, but this may vary according to the intention or precedent of a technician working in the field, the emergence of new technologies, and the like. In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning of the terms will be described in detail in the description of the corresponding invention. Therefore, the terms used in the present invention should be defined based on the meaning of the term and the overall contents of the present invention, not a simple name of the term.
[43]
[44]

[45]
Next, a battery module according to an embodiment of the present invention will be described.
[46]
A battery module according to an embodiment of the present invention is accommodated inside a frame capable of transferring a plurality of battery cells. In addition, the battery module includes a heat dissipating member having a plurality of through-holes so that a cap of the positive (+) electrode terminal of the battery cell for ejecting gas, flame, and discharge when ignited can be opened. Accordingly, the battery module rapidly discharges heat generated from the battery cell, and the cap is easily opened when ignited so that the battery module can be safely driven.
[47]
2 is an exploded perspective view of a battery module according to an embodiment of the present invention.
[48]
Referring to FIG. 2, the battery module 100 according to an embodiment of the present invention includes an upper frame 110 for transferring heat generated from the battery cell assembly 130, and an upper heat dissipation located under the upper frame 110. A battery cell assembly in which a plurality of battery cells are arranged adjacent to each other with a structure in which the member 120 and the upper radiating member 120 have a negative (-) pole on the upper side and a positive (+) pole on the lower side (130), the lower heat dissipation member 140 and the lower heat dissipation member 140, which are located under the battery cell assembly 130 and have a through hole formed at a position corresponding to the end of the positive (+) terminal of each battery cell. It is located and is connected to the upper frame 110 is configured to include a lower frame 150 that receives heat from the upper frame 110 or transfers heat to the upper frame 110.
[49]
The configuration of the battery module 100 will be described in more detail below.
[50]
The upper frame 110 and the lower frame 150 are configured to mutually transfer heat generated from each electrode of the plurality of battery cells and dissipate heat to the outside, and may be made of a material having high heat conduction characteristics.
[51]
As an embodiment, aluminum may be used as a material, but is not limited thereto.
[52]
Further, the upper frame 110 forms an upper end of the entire battery module, and the lower frame 150 forms a lower end of the entire battery module to protect the inside of the battery module. In addition, the upper frame 110 and the lower frame 150 are provided with a coupling portion on the side to be coupled to each other.
[53]
Here, the coupling portion may be formed in the shape of one frame in the shape of'b' and the other frame in the shape of'b' to enable fitting coupling, but is not limited thereto, and may be formed in various coupling shapes.
[54]
In addition, the lower frame 150 further forms a heat dissipating member expansion groove having a predetermined depth in a portion of the upper surface to further secure a space for the lower heat dissipating member 140.
[55]
At this time, the thickness of the lower heat dissipation member 140 has a value greater than the thickness of the upper heat dissipation member 120 and corresponds to a height formed by the combination of the heat dissipation member seating groove 131_2 described below and the heat dissipation member expansion groove. Have.
[56]
The expanded space thus formed can be accommodated even when the amount of flame, gas and discharged from the positive (+) electrode terminal is large when ignited.
[57]
In addition, the upper heat dissipation member 120 and the lower heat dissipation member 140 are formed in contact with the upper frame 110 and the lower frame 150, respectively, so that heat generated from the plurality of battery cells is removed from the upper frame 110. ) And the lower frame 150 so that heat can be discharged to the outside.
[58]
In addition, the upper heat dissipation member 120 and the lower heat dissipation member 140 may be configured in a pad shape, and as an example, when configured as a silicon pad, insulation may be secured, but the present invention is not limited thereto.
[59]
In addition, the upper heat dissipation member 120 is formed in a flat plate shape so as to cover the entire upper surface of the plurality of battery cells, and the lower heat dissipation member 140 is an end of the positive (+) electrode terminal of the plurality of battery cells. A through hole is formed at a position corresponding to.
[60]
If an abnormal condition occurs in the battery cell and ignites, in order to prevent further combustion and explosion, the cap of the positive (+) terminal is opened by the pressure inside the battery cell, and the cap of the opened positive (+) terminal is removed. Gas, flame, and discharge may be ejected through the through hole of the lower radiating member 140.
[61]
In addition, the battery cell assembly 130 is located between the upper heat dissipation member 120 and the lower heat dissipation member 140, so that a negative (-) pole is located on the upper side, and a positive (+) pole is located on the lower side. A configuration in which a plurality of battery cells are arranged adjacent to each other, and is formed in a form in contact with the upper heat dissipating member 120 and the lower heat dissipating member 140, respectively.
[62]
The configuration of the battery cell assembly 130 will be described in more detail with reference to FIG. 3.
[63]
3 is a side view of a battery module according to an embodiment of the present invention.
[64]
Referring to FIG. 3, the battery cell assembly 130 further includes a cell fixing frame 131 for fixing the plurality of battery cells 132.
[65]
In addition, the cell fixing frame 131 may be divided into an upper portion and a lower end portion, and the upper portion and the lower portion are formed in a coupling shape similar to the coupling portion of the upper frame 110 and the lower frame 150.
[66]
In addition, the battery cell assembly 130 includes a plurality of through holes 131_1 communicating in a vertical direction so that one end of the circular battery cell can be inserted and fixed.
[67]
In addition, the through hole 131_1 has a diameter of a portion that meets the end of the battery cell inserted in the through hole 131_1 to be smaller than the body diameter of the circular battery cell, so that the battery cell is not discharged to the outside.
[68]
However, due to the protective structure of the battery cell, the cap of the positive (+) electrode of the battery cell may be opened when the battery cell is ignited, so that the gas, flame, and discharges are formed to be larger than a predetermined diameter range so as to be easily discharged.
[69]
In addition, the cell fixing frame 131 includes a heat dissipating member mounting groove 131_2 formed at a predetermined depth on the upper and lower surfaces so that the upper heat dissipating member 120 and the lower heat dissipating member 140 can be seated in a proper position. It is configured to include more.
[70]
The heat dissipation member seating groove 131_2 is so that the upper heat dissipation member 120 and the lower heat dissipation member 140 must be disposed above/below the plurality of battery cells 132 so that they can be easily disposed without a separate attachment member. do. This may cause heat to be generated in the attachment portion to which the attachment member is attached, and thus heat dissipation efficiency can be reduced.
[71]
In addition, the battery cell used herein refers to a cylindrical battery cell, and the cell fixing frame is made of an insulating material.
[72]
In addition, the battery module 100 is a metal contacting upper and lower surfaces of the plurality of battery cells in the battery cell assembly 130 to electrically connect the positive and negative terminals of the plurality of battery cells, respectively. It is configured to further include a plate 160, which will be described in more detail with reference to FIG. 4.
[73]
4 is an enlarged side view of a battery module according to an embodiment of the present invention.
[74]
Referring to FIG. 4, the metal plate 160 has through holes 161 formed at positions corresponding to positive (+) electrode terminals and negative (-) electrode terminals of the plurality of battery cells. More precisely, a through hole 161 is formed at a position corresponding to an end of the electrode terminal, and a connection terminal 162 formed inside the through hole abuts against the plurality of battery cells to electrically connect them.
[75]
Here, the through hole 161 is formed so that when ignition occurs in the plurality of battery cells, gas, flame, and discharge can be ejected to the positive (+) pole of the corresponding battery cell.
[76]
In addition, in general, when charging/discharging through the connection terminal 162, since the negative (-) electrode of the battery cell has more heat than the positive (+) electrode of the battery cell, the metal plate 160 through the through hole 161 And the plurality of battery cells 132 are spaced apart by a predetermined distance.
[77]
In addition, the metal plate 160 may be made of copper as an embodiment, and the connection terminal 162 may be made of nickel. This uses nickel, which is easy for welding, as the connection terminal 162, and it is not suitable for resistance welding due to its low resistance. To be.
[78]
In addition, the metal plate 160 is disposed together with the upper radiating member 120 and the lower radiating member 140 in the radiating member mounting groove 131_2 of the cell fixing frame 131.
[79]
In more detail, the metal plate 160 is positioned between a lower portion of the upper heat dissipating member 120 and an upper portion of the plurality of battery cells 132, and the lower and lower heat dissipating members of the plurality of battery cells 132 (140) Located between the top.
[80]
Therefore, it can be easily disposed in the correct position without a separate fixing configuration, and heat transfer can be made more quickly as it is formed in contact with the heat dissipating member.
[81]
In addition, a flow through which heat generated from the battery module 100 is transferred will be described in detail with reference to FIG. 5.
[82]
5 is a flow chart of heat transfer of a battery module according to an embodiment of the present invention.
[83]
First, FIG. 5 is a heat dissipation transmission path through which heat generated from a plurality of battery cells 123 is discharged to the outside, and a large amount of heat is generated from the battery cells 132 during charging/discharging. Heat generated from the battery cell is transferred to the heat dissipating members 120 and 140 via the metal plate 160, and the heat dissipating member 120 quickly transfers heat to the frames 110 and 150.
[84]
Heat transferred to the frames 110 and 150 is radiated to the outside through upper, lower, and both side surfaces of the frames 110 and 150.
[85]
Since the lower portions of the frames 110 and 150 form a bottom surface, it is difficult to efficiently dissipate heat to the outside, so that heat that has not been discharged downward is transferred to both side surfaces to be discharged to the outside.
[86]
In addition, since the negative (-) pole of the plurality of battery cells 132 is located on the upper portion of the frames 110 and 150, the amount of heat generated is greater than that of the positive (+) pole of the battery cells. It is transmitted to the department so that it can be released to the outside.
[87]
The heat dissipation effect of the battery module according to the exemplary embodiment of the present invention will be described in more detail with reference to FIG. 6 which is the result of the charging experiment.
[88]
6 is an exemplary diagram illustrating a temperature change of a battery module according to an embodiment of the present invention.
[89]
Referring to FIG. 6, in this experiment, a total of 6 points of the positive (+) electrode terminal of each battery cell were measured at 1 C-rate. This is because the lower heat dissipation member 140 of the battery module according to the embodiment of the present invention is drilled corresponding to the end of the positive (+) electrode terminal, so that the temperature at the six points can be easily measured. Through this, the exact temperature of each battery cell was measured.
[90]
6-(a) is a temperature measurement value of a conventional battery module, and 6-(b) is a temperature measurement value of a battery module according to an embodiment of the present invention.
[91]
Comparing 6-(a) and 6-(b), 6-(a) has a lower overall temperature measurement value than 6-(b), and the average temperature of 6-(a) is approximately 47°C. As the average temperature of 6-(b) is approximately 46°C, it can be seen that heat generated from each battery cell is rapidly released to the outside by the structure of the battery module of the present invention.
[92]
In addition, in this experiment, since the lower frame 150 is not disposed to facilitate heat dissipation in order to accurately measure the temperature of the battery cell, when the lower frame 150 is disposed, the temperature reduction effect will be further increased. will be.
[93]
[94]

[95]
Next, a battery pack according to an embodiment of the present invention will be described.
[96]
In the battery pack according to the embodiment of the present invention, two batteries through one temperature controller are configured as a temperature controller configured to control the temperature of the battery module between the battery modules formed in a structure with high heat transfer efficiency according to the above embodiment. This allows the temperature of the module to be kept more efficiently and constant.
[97]
7 is a side view of a battery pack according to an embodiment of the present invention.
[98]
Referring to FIG. 7, in the battery pack 1000 according to an embodiment of the present invention, a plurality of battery cells in which a positive (+) electrode is located on an upper side and a negative (-) electrode is located on a lower side are accommodated in a heat transfer frame. The first battery module unit 1100 formed in a structure, the temperature control unit 1200 located under the first battery module unit 1100 to control temperatures of a plurality of battery cells, and the temperature control unit 1200 , It includes a second battery module unit 1300 formed in a structure in which a plurality of battery cells in which a negative (-) electrode is located on an upper side and a positive (+) electrode is located on a lower side are accommodated in a heat transfer frame.
[99]
The configuration of the battery pack 1000 will be described in more detail below.
[100]
In addition, the first battery module unit 1100 has a structure in which a plurality of battery cells in which a positive (+) electrode is located on an upper side and a negative (-) electrode is located on a lower side are accommodated in a heat transfer frame. More precisely, the first battery module unit 1100 includes a first upper heat transfer frame 1110, a first upper heat dissipation member 1120, a first lower heat dissipation member 1140, and a first lower heat transfer frame 1150. ) Between the plurality of battery cells 1131 are positioned.
[101]
In addition, the first upper heat transfer frame 1110 is configured to discharge heat generated from the plurality of battery cells to the outside, and forms the uppermost end of the entire battery module.
[102]
In addition, the first upper heat dissipation member 1120 is positioned between the first upper heat transfer frame 1110 and the plurality of battery cells 1131, and corresponds to an end of the positive (+) electrode terminal of each battery cell. It is a configuration in which a through hole is formed at the location.
[103]
Here, the through hole allows flame and gas ejected from the inside of the battery cell through the positive (+) electrode terminal when the battery cell is ignited.
[104]
In addition, the first upper heat dissipating member 1120 may be made of a flame-retardant and non-flammable material so that the flame generated from one battery cell does not spread to other battery cells.
[105]
In addition, the plurality of battery cells 1131 are configured to be accommodated inside the cell fixing frame 1132, and the cell fixing frame 1132 has a heat dissipating member mounting groove having a predetermined depth on the upper and lower surfaces thereof, The member 1120 and the lower heat dissipating member 1140 can be seated in the correct position.
[106]
Here, the correct position means a position that covers the entire upper and lower surfaces of the plurality of battery cells 1131, which is inside the cell fixing frame 1132 as well as the plurality of battery cells 1131 Since the BMS controlling 1131 is disposed on the side, the upper heat dissipating member 1120 and the lower heat dissipating member 1140 may be disposed at a position where heat dissipation is required.
[107]
In addition, the first lower heat dissipation member 1140 is positioned under the plurality of battery cells to transfer heat generated from the negative (-) electrode of the battery cells to the first lower heat transfer frame 1150.
[108]
Here, the first upper heat dissipation member 1120 and the first lower heat dissipation member 1140 are formed as flat plate-shaped pads and are disposed in the heat dissipation member seating groove of the cell fixing frame 1132.
[109]
In addition, the plurality of battery cells 1131 may further include a metal plate contacting an upper surface and a lower surface to electrically connect positive and negative terminals of the battery cells, respectively. The metal plate is disposed between the lower portion of the first upper heat radiation member 1120 and the upper portion of the plurality of battery cells 1131 as the metal plate is disposed in the heat dissipating member mounting groove, and the lower portion of the plurality of battery cells 1131 and the first It is located between the upper portions of the lower radiating member 1140.
[110]
In addition, the first lower heat transfer frame 1150 is located under the first lower heat dissipation member 1140 and is connected to the first upper heat transfer frame 1110 from the first upper heat transfer frame 1110. In this configuration, the transferred heat is transferred to the temperature controller 1200 or the heat generated from the temperature controller 1200 is received and transferred to the plurality of battery cells 1131.
[111]
In addition, heat generated from the plurality of battery cells 1131 is also transferred to the temperature control unit 1200 to be cooled.
[112]
In addition, on the lower surface of the first lower heat transfer frame 1150, a first temperature control unit having a predetermined depth is mounted on a contact surface of the heat transfer frame in contact with the temperature control unit so that the temperature control unit 1200 is disposed inside the frame body. A groove 1151 is formed. Here, the predetermined depth is formed to have a length equal to 1/2 of the height of the temperature control unit 1200 so that the temperature control unit 1200 is configured as a single frame without a separate configuration to be protected.
[113]
In addition, the temperature control unit 1200 is located below the first battery module unit 1100, and is located above the second battery module unit 1300 to control the temperature of a plurality of battery cells in each battery module. As a configuration, it may be formed as a cooling member, a heating member, or a configuration in which the cooling member and the heating member are combined.
[114]
In addition, the cooling member is formed in a plate shape, a liquid cooler or a metal cooler is used, and the outside is made of a thermally conductive material so that heat can quickly enter or transfer from the outside.
[115]
In addition, the heating member is formed in a plate shape, a liquid heater or a metal heater is used, and the outside is made of a thermally conductive material so that heat can be quickly discharged or transferred to the outside.
[116]
In addition, the cooling member and the heating member are electrically connected to the BMS controlling the battery pack to drive the cooling member through the BMS when the temperature of the battery pack exceeds a predetermined temperature, and when the temperature of the battery pack is less than the predetermined temperature, The heating element can be driven through BMS.
[117]
If the cooling member and the heating member are combined, the heating member functions as a heat transfer configuration when the cooling member is driven, and the cooling member functions as a heat transmission configuration when the heating member is driven.
[118]
In addition, the second battery module unit 1300 is located under the temperature control unit 1200, a plurality of battery cells having a negative (-) pole positioned on the upper side and a positive (+) pole positioned on the lower side are opened. It is formed in a structure accommodated in the transmission frame. To be more precise, the plurality of battery cells ( 1331) is located.
[119]
In addition, the second upper heat transfer frame 1310 is located under the temperature control unit 1200 to receive heat from the temperature control unit 1200 or to control heat generated from the plurality of battery cells. 1200). In addition, a second temperature control unit seating groove 1311 having a predetermined depth is formed on a contact surface of the heat transfer frame in contact with the temperature control unit so that the temperature control unit 1200 is disposed inside the frame body.
[120]
Here, the predetermined depth is formed to have a length equal to 1/2 of the height of the temperature control unit 1200 and is combined with the first temperature control unit seating groove 1151 formed on the lower surface of the first lower heat transfer frame 1150 The temperature control unit 1200 may be disposed in the region.
[121]
In addition, the second upper heat transfer frame 1310 and the first lower heat transfer frame 1150 further form separate connecting portions so that they can be connected and fixed to each other.
[122]
The coupling form of the connection part is an example, and a protrusion that extends from the heat transfer frame and is formed in a form in which a through hole is drilled at the same position so that a bolt and a screw are combined, or a protrusion that can be forcibly fitted to each of the upper and lower surfaces It may be formed as an uneven portion formed, but is not limited thereto.
[123]
In addition, the second upper heat dissipation member 1320 is located between the second upper heat transfer frame 1310 and the plurality of battery cells 1331 and is generated at the negative (-) pole of the plurality of battery cells 1331 The heat generated is quickly transferred to the temperature controller 1200.
[124]
In addition, the plurality of battery cells 1331 are accommodated inside the cell fixing frame 1132 and are the same as the configuration of the plurality of battery cells 1131 in the first battery module unit.
[125]
In addition, the second lower heat dissipation member 1340 is located under the plurality of battery cells 1331 and a through hole is formed at a position corresponding to an end of the positive (+) electrode terminal of each battery cell.
[126]
Here, the through hole allows discharge, flame, and gas to be ejected from the inside of the battery cell through the positive (+) electrode terminal when the battery cell is ignited.
[127]
In addition, the second lower heat dissipation member 1340 may be made of a flame-retardant and non-flammable material so that the flame generated from one battery cell does not spread to other battery cells.
[128]
In addition, the second upper heat dissipating member 1320 and the second lower heat dissipating member 1340 are formed as flat plate-shaped pads and are disposed in the heat dissipating member seating groove of the cell fixing frame 1332.
[129]
In addition, the second lower heat transfer frame 1350 is located under the second lower heat dissipation member 1340, is connected to the second upper heat transfer frame 1310, and is connected to the second upper heat transfer frame 1310. It is a configuration that receives heat or transfers heat generated from the plurality of battery cells 1331 to the second upper heat transfer frame 1310.
[130]
In addition, a flow through which heat is transferred in the battery pack 1000 by the temperature controller 1200 will be described in detail with reference to FIGS. 8 and 9.
[131]
8 is a flow chart of heat transfer by a cooling member in a battery pack according to an embodiment of the present invention.
[132]
9 is a flow chart of heat transfer by a heating member in a battery pack according to an embodiment of the present invention.
[133]
First, FIG. 7 is a heat dissipation transmission path through which heat generated from a plurality of battery cells 123 is partially radiated to the outside while being transferred to the cooling member in the temperature controller 1200, and FIG. 8 is a diagram illustrating the temperature controller 1200 This is a heat transfer path through which heat generated by the inner heating member is transferred to the first battery module unit 1100 and the second battery module unit 1300.
[134]
Referring to FIG. 8, a large amount of heat is generated from each electrode terminal of the battery cells 1131 and 1331 during charging/discharging, and this heat is transferred to the heat dissipating members 1120, 1140, and 1320 in contact with each electrode terminal. It quickly transfers heat to the frames 1110, 1150, 1310, 1350.
[135]
In more detail, the negative (-) pole of the plurality of battery cells 1131 in the first battery module unit 1100 and the negative (-) of the plurality of battery cells 1331 in the second battery module unit 1300 ) Heat generated from the pole is directly transferred to the cooling member through the first lower heat transfer frame 1140 and the second upper heat transfer frame 1310.
[136]
In general, since the negative (-) terminal has more heat generation than the positive (+) terminal of the battery cell, the negative (-) terminal of the battery cell is disposed in a position close to the cooling member to allow rapid cooling.
[137]
In addition, heat generated from the positive (+) poles of the plurality of battery cells 1131 in the first battery module unit 1100 is transferred from the first upper heat transfer frame 1110 to the first lower heat transfer frame 1150. The heat is transferred to the cooling member, and the heat generated from the positive (+) electrode of the plurality of battery cells 1331 in the second battery module unit 1300 is transferred from the second lower heat transfer frame 1350 to the second upper portion. It is transferred to the heat transfer frame 1310 and transferred to the cooling member.
[138]
In addition, the heat generated from the plurality of battery cells is the upper surface and side surfaces of the first upper heat transfer frame 1110, the first lower heat transfer frame 1150, the side and the second upper heat transfer frame 1310 Although some may be discharged to the outside through the lower surface and the side surface of the second lower heat transfer frame 1350, when the temperature of the device in which the battery pack 1000 is mounted is high, the amount of heat emitted is not large.
[139]
Therefore, it is possible to quickly reduce the temperature of the battery cell through the cooling member.
[140]
In addition, referring to FIG. 9, when the battery pack is driven in a low temperature state, heat is generated from the heating member. This heat is first transferred to the negative terminal of the battery cell adjacent to the heating member, and the battery cell is passed through each heat transfer frame. It is also transmitted to the positive terminal of.
[141]
In more detail, the heat of the heating member is directly transferred to the first battery module unit 1100 through the first lower heat transfer frame 1140 and the second upper heat transfer frame 1310.
[142]
In addition, heat from the heating member is transferred from the first lower heat transfer frame 1150 to the first upper heat transfer frame 1110, and the transferred heat is transferred to a plurality of battery cells in the first battery module unit 1100. 1131) is transferred to the positive (+) pole.
[143]
In addition, the heat of the heating member is transferred from the second upper heat transfer frame 1310 to the second lower heat transfer frame 1350, and the transferred heat is transferred to a plurality of battery cells in the second battery module unit 1300. It is transferred to the positive (+) pole of (1331) so that heat can be evenly distributed to each electrode terminal.
[144]
[145]
On the other hand, although the technical idea of ​​the present invention has been described in detail according to the above embodiment, it should be noted that the above embodiment is for the purpose of explanation and not for the limitation thereof. In addition, a person having ordinary knowledge in the technical field of the present invention may be able to implement various embodiments within the described claims.
[146]
[147]
[Explanation of code]
[148]
100: battery module
[149]
110: upper frame
[150]
120: upper heat dissipation member
[151]
130: battery cell assembly
[152]
131: cell fixing frame
[153]
131_1: multiple through holes
[154]
131_2: radiating member mounting groove
[155]
132: a plurality of battery cells
[156]
140: lower heat dissipation member
[157]
150: lower frame
[158]
151: cell terminal coupling portion
[159]
160: metal plate
[160]
161: through hole
[161]
162: connection terminal
[162]
1000: battery pack
[163]
1100: first battery module
[164]
1110: first upper heat transfer frame
[165]
1120: first upper radiating member
[166]
1131: multiple battery cells
[167]
1132: cell fixing frame
[168]
1140: first lower radiating member
[169]
1150: first lower heat transfer frame
[170]
1200: temperature control unit
[171]
1300: second battery module
[172]
1310: second upper heat transfer frame
[173]
1320: second upper radiating member
[174]
1331: multiple battery cells
[175]
1332: cell fixing frame
[176]
1340: second lower radiating member
[177]
1350: second lower heat transfer frame
[178]
Claims
[Claim 1]
A battery module comprising a plurality of battery cells, the battery module comprising: an upper frame transferring heat generated from the plurality of battery cells; An upper radiating member positioned under the upper frame; A battery cell assembly in which a plurality of battery cells are arranged adjacent to each other having a structure in which a negative (-) electrode is located on an upper side and a positive (+) electrode is located on a lower side of the upper radiating member; A lower heat dissipating member positioned below the battery cell assembly and having a through hole formed at a position corresponding to an end of the positive (+) electrode terminal of each battery cell; And a lower frame positioned under the lower heat dissipating member and having a coupling portion connected to the upper frame to receive heat from the upper frame or to transfer heat to the upper frame. Battery module, characterized in that configured to include.
[Claim 2]
The battery module of claim 1, wherein the battery cell assembly further includes a cell fixing frame fixing the plurality of battery cells.
[Claim 3]
The battery module according to claim 2, wherein the cell fixing frame has a heat dissipating member mounting groove having a predetermined depth on its upper and lower surfaces so that the upper and lower heat dissipating members can be seated in position.
[Claim 4]
The method according to claim 1, wherein the battery module is in contact with the upper surface and the lower surface of the plurality of battery cells in the battery cell assembly, respectively, the positive (+) terminal and the negative (-) terminal of the plurality of battery cells. A metal plate electrically connected to each other; Battery module, characterized in that configured to include a further.
[Claim 5]
The battery module of claim 4, wherein the metal plate has through holes formed at positions corresponding to positive (+) electrode terminals and negative (-) electrode terminals of the plurality of battery cells.
[Claim 6]
In a battery pack configured for heat control between a plurality of battery modules composed of a plurality of battery cells, a plurality of battery cells having a positive (+) pole located on the upper side and a negative (-) pole located on the lower side are accommodated in the heat transfer frame. A first battery module unit formed in a structured structure; A temperature controller positioned under the first battery module to control temperatures of a plurality of battery cells; And a second battery module unit disposed below the temperature control unit and configured to accommodate a plurality of battery cells having a negative (-) electrode disposed on an upper side and a positive (+) electrode disposed on a lower side thereof in a heat transfer frame. A battery pack comprising a.
[Claim 7]
The apparatus of claim 6, wherein the first battery module unit comprises: a first upper heat transfer frame discharging heat generated from the plurality of battery cells to the outside; A first upper heat dissipating member positioned between the first upper heat transfer frame and the plurality of battery cells and having a through hole formed at a position corresponding to an end of the positive (+) electrode terminal of each battery cell; A first lower heat dissipating member positioned under the plurality of battery cells; And located below the first lower heat dissipation member and above the temperature control unit, and is connected to the first upper heat transfer frame to transfer heat transferred from the first upper heat transfer frame to the temperature control unit or from the temperature control unit. A first lower frame receiving heat; Battery pack, characterized in that configured to include.
[Claim 8]
The second upper heat transfer frame of claim 6, wherein the second battery module unit is located under the temperature control unit and receives heat from the temperature control unit or transfers heat generated from the plurality of battery cells to the temperature control unit. ; A second upper heat dissipating member positioned between the second upper heat transfer frame and a plurality of battery cells; A second lower heat dissipating member positioned under the plurality of battery cells and having a through hole formed at a position corresponding to an end of a positive (+) electrode terminal of each battery cell; And a second lower heat transfer frame positioned below the second lower heat dissipating member and connected to the second upper heat transfer frame to receive heat from the second upper heat transfer frame or transfer heat to the second upper heat transfer frame. ; Battery pack, characterized in that configured to include.
[Claim 9]
The method of claim 6, wherein the heat transfer frame of the first battery module part and the second battery module part has a temperature control part having a predetermined depth on a contact surface of the heat transfer frame in contact with the temperature control part so that the temperature control part is disposed inside the heat transfer frame. Seating groove; Battery pack, characterized in that the further formation.
[Claim 10]
The battery pack according to claim 6, wherein the temperature controller is formed in a configuration in which a cooling member, a heating member, or a cooling member and a heating member are combined.