Specification
Title of invention: Battery pack with bidirectional cooling structure
Technical field
[One]
The present invention relates to a battery pack having a two-way cooling structure, and more particularly, to a battery pack having a two-way cooling structure formed in a structure that evenly supplies or discharges heat to overlapped battery modules.
[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.
[4]
In addition, the shape of the battery pack 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 pack and a prismatic battery pack, and the electrode assembly is formed of an aluminum laminate sheet. If it is built into a pouch-type case, it is classified as a pouch-type battery pack.
[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 to enable charging/discharging, and the cylindrical electrode assembly has a long sheet-shaped positive electrode coated with an electrode active material. , A separator and a negative electrode are sequentially stacked and wound in a jelly-roll type.
[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 Figure 1, Figure 1-(a) shows that the positive (+) pole of a plurality of cylindrical battery cells is located at the top and the negative (-) pole is located at the bottom, and the cooling member is the negative (-) of the battery cells. It is a structural diagram of a conventional battery pack disposed below the pole.
[10]
In addition, FIG. 1-(b) is a structural diagram of a conventional battery pack in which a cooling member is positioned on the side of every two rows of a plurality of cylindrical battery cells.
[11]
In the structure of the battery pack in FIG. 1-(a), as the battery cells are located only in the upper portion, the cooling effect on the surface not in contact with the battery cells is discarded.
[12]
In addition, the structure of the battery pack in FIG. 1-(b) is that as a plurality of cooling members are configured, the space inside the battery pack is reduced and the cost of the cooling member is increased. As the heat generation of the) electrode terminal further occurs, the efficiency of the structure for cooling the side surface decreases.
[13]
Accordingly, there is a need for a method capable of reducing the cost of a plurality of cooling members and increasing the cooling effect of the battery cell.
[14]
[Prior technical literature]
[15]
[Patent Literature]
[16]
(Patent Document 1) KR2017-0022460 A
[17]
Detailed description of the invention
Technical challenge
[18]
The present invention provides a battery pack having a two-way cooling structure that reduces heat generated from a battery cell when driving a plurality of battery cells, arranges a minimum number of cooling members, and increases the efficiency of the cooling members.
[19]
Means of solving the task
[20]
A battery pack having a two-way cooling structure according to an embodiment of the present invention is composed of a plurality of circular cells, and a left battery module 110 in which a plurality of circular cells are continuously arranged in the width direction, is located adjacent to the right side of the left battery module. A left heat transfer frame 120 for transferring heat generated from the circular cell, a cooling member 130 positioned adjacent to the left heat transfer frame to cool heat transferred from the left heat transfer frame, and adjacent to the right side of the cooling member The right heat transfer frame 140 positioned to transfer heat to the cooling member and the right battery module 150 positioned adjacent to the right side of the right heat transfer frame, composed of a plurality of circular cells, and in which a plurality of circular cells are continuously arranged in the width direction Consists of including.
[21]
The plurality of circular cells of the left battery module are arranged in one direction with a positive (+) pole on the left and a negative (-) pole on the right.
[22]
The plurality of circular cells of the right battery module are arranged in one direction with a negative (-) pole on the left and a positive (+) pole on the right.
[23]
The battery pack includes: a lower plate positioned under the left battery module, left heat transfer frame, cooling member, right heat transfer frame, and right battery module, and the left battery module, left heat transfer frame, cooling member, right heat transfer frame, and right battery It is configured to further include an upper cover positioned on the upper part of the module and coupled to the lower plate.
[24]
The upper cover is provided with an overpressurization protrusion disposed at a position corresponding to the left heat transfer frame, the cooling member, and the right heat transfer frame.
[25]
A first battery module composed of a plurality of circular battery cells arranged in a row in the width direction, and negative (-) and positive (+) electrodes arranged in the same direction, and a plurality of circular battery cells are continuously arranged in the width direction. A second battery module configured with the (-) and positive (+) poles arranged in the same direction, and the first and second battery modules are adjacent so that the negative (-) pole directions of the included circular battery cells face each other. And a cooling module configured to cool heat generated from the circular battery cells between the first battery module and the second battery module.
[26]
The cooling module includes a first heat transfer frame and a second heat transfer frame disposed adjacent to the first battery module and the second battery module, respectively, and first and second heat transfer frames are provided between the first and second heat transfer frames. A cooling member for cooling the transferred heat is provided, and the first and second heat transfer frames transfer heat generated from the battery cells to the cooling member.
[27]
The battery pack may include a lower plate positioned below the first battery module, the second battery module, and the cooling module, and positioned above the first battery module, the second battery module, and the cooling module, and coupled to the lower plate. It is configured to further include an upper cover.
[28]
The upper cover is provided with an overpressing prevention protrusion disposed at a position corresponding to the cooling module.
[29]
The cooling member is formed in a plate shape and uses a liquid cooler or a metal cooler.
[30]
The cooling member is made of a thermally conductive material.
[31]
In the battery pack, a heating member is additionally disposed on the left or right side of the cooling member.
[32]
The heating member is formed in a plate shape and uses a liquid heater or a metal heater.
[33]
The heating member is made of a thermally conductive material.
[34]
Effects of the Invention
[35]
In the battery pack according to an embodiment of the present invention, battery modules formed of a plurality of battery cells are disposed on both sides, and cooling members having a heat transfer frame formed on both sides are positioned between the battery modules so that cooling of the battery cells can be quickly and evenly performed. This prevents deterioration and explosion of the battery pack.
[36]
Brief description of the drawing
[37]
1 is a structural diagram of a conventional battery pack.
[38]
2 is a perspective view of a battery pack according to an embodiment of the present invention.
[39]
3 is a front cut-away structural diagram of a battery pack according to an embodiment of the present invention.
[40]
4 is a front cut-away structural diagram of a battery pack according to another embodiment of the present invention.
[41]
Best mode for carrying out the invention
[42]
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.
[43]
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.
[44]
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.
[45]
[46]

[47]
Next, a battery pack according to an embodiment of the present invention will be described.
[48]
In the battery pack according to an embodiment of the present invention, heat generated from the battery cells is effectively cooled as the cooling member in which the heat transfer member is disposed in contact with both sides is formed between the battery modules composed of a plurality of battery cells, so that the temperature in the battery pack is reduced. Keep it constant.
[49]
2 is a perspective view of a battery pack according to an embodiment of the present invention.
[50]
Referring to FIG. 2, the battery pack 100 according to an embodiment of the present invention is composed of a plurality of circular cells, and a left battery module 110 and the left battery module 110 in which a plurality of circular cells are continuously arranged in the width direction. A cooling member 130 positioned adjacent to the right side of the left heat transfer frame 120 to transfer heat generated from the circular cell, and positioned adjacent to the left heat transfer frame 120 to cool heat transferred from the left heat transfer frame. ) And a plurality of circular cells positioned adjacent to the right side of the right heat transfer frame 140 and the right side of the right heat transfer frame 140 to transfer heat to the cooling member by being positioned adjacent to the right side of the cooling member 130. It is configured to include a right battery module 150 in which circular cells are continuously arranged in the width direction.
[51]
The configuration of the battery pack 100 will be described in more detail below.
[52]
In addition, the left battery module 110 and the right battery module 150 are composed of a plurality of circular cells, and the plurality of circular cells are continuously arranged in a width direction to be stacked.
[53]
In addition, the plurality of circular cells may be configured as one battery module for each predetermined number and formed in a separate case. Here, the separate case is formed of a material having high thermal conductivity.
[54]
In addition, the plurality of circular cells of the left battery module 110 are arranged in one direction with a positive (+) pole on the left and a negative (-) pole on the right, and the plurality of circular cells of the right battery module 150, It is arranged in one direction with a negative (-) pole on the left and a positive (+) pole on the right.
[55]
In general, this is because the amount of heat generated from the negative (-) electrode of the battery cell is greater than the amount of heat generated from the positive (+) electrode, so that the temperature of the battery pack is rapidly decreased, Place the negative (-) pole.
[56]
In addition, the left heat transfer frame 120, the cooling member 130 and the right heat transfer frame 140 are constituted by one cooling module, and will be described in detail with reference to FIG. 3.
[57]
3 is a side structural diagram of a battery pack according to an embodiment of the present invention.
[58]
3, the left heat transfer frame 120 is located adjacent to the right side of the left battery module 110, and the right heat transfer frame 140 is located adjacent to the left side of the right battery module 150. It is arranged to be located.
[59]
In addition, the left heat transfer frame 120 is positioned adjacent to the left side of the cooling member 130, and the right heat transfer frame 140 is positioned adjacent to the right side of the cooling member 130, so that the left battery module ( 110) and the heat generated from the plurality of circular cells in the right battery module 150 are transferred to the cooling member. When the cooling member 130 directly contacts the plurality of battery cells in the left heat transfer frame 120 and the right heat transfer frame 140, the battery cells are frozen, and thus the life or stability of the battery pack, and driving It prevents performance degradation and prevents damage to the cooling member 130 from a number of factors.
[60]
In addition, the left heat transfer frame 120 and the right heat transfer frame 140 are formed in a plate shape, so that one side of the wide portion contacts the negative (-) pole of the plurality of battery cells, and the other side is the cooling member 130 It is formed in a contact shape so that a plurality of battery cells can be cooled by a single cooling module.
[61]
In addition, the left heat transfer frame 120 and the right heat transfer frame 140 may be made of a material having high heat conduction characteristics. As an embodiment, aluminum may be used as a material, but is not limited thereto.
[62]
In addition, the cooling member 130 is positioned adjacent to the left heat transfer frame 120 and the right heat transfer frame 140 to transfer heat from the left heat transfer frame 120 and the right heat transfer frame 140. It is a configuration to cool.
[63]
In addition, the cooling member 130 is formed in a plate shape, uses a liquid cooler or a metal cooler, and is made of a thermally conductive material on the outside so that heat can quickly enter from the outside.
[64]
In addition, the cooling member 130 is electrically connected to the BMS that controls the battery pack so that it can be driven through the BMS when the temperature of the battery pack exceeds a predetermined temperature.
[65]
In addition, the battery pack includes a lower plate 160 located under the left battery module 110, the left heat transfer frame 120, the cooling member 130, the right heat transfer frame 140, and the right battery module 150. And an upper portion which is positioned above the left battery module 110, the left heat transfer frame 120, the cooling member 130, the right heat transfer frame 140, and the right battery module 150 and is coupled to the lower plate 160. It is configured to further include a cover 170.
[66]
In more detail, in the center of the lower plate 160, the left heat transfer frame 120, the cooling member 130, and the right heat transfer frame 140 are formed to allow cooling of the battery pack to be performed. The upper cover 170 includes the left heat transfer frame 120, the cooling member 130, and the right heat transfer frame 140 formed in the center of the lower plate 160, and an overpressurization protrusion 171 disposed at corresponding positions. Is formed.
[67]
The overpressed protrusion 171 allows the cooling components 120, 130, and 140 to be protected from external impact.
[68]
[69]

[70]
Next, a battery pack according to another embodiment of the present invention will be described.
[71]
The battery pack according to another embodiment of the present invention is generated from the battery cells according to the temperature in the battery pack as a cooling member and a heating member in which heat transfer members are disposed in contact with both sides are formed between battery modules composed of a plurality of battery cells. The resulting heat is cooled or heat is applied to the battery cells so that the temperature of the battery pack can be kept constant.
[72]
4 is a front cut-away structural diagram of a battery pack according to another embodiment of the present invention.
[73]
Referring to FIG. 4, in the battery pack 200 according to another embodiment of the present invention, a plurality of circular battery cells are continuously arranged in the width direction, and the negative (-) pole and the positive (+) pole are arranged in the same direction. The first battery module 210, the second battery module 260, and between the first battery module and the second battery module are configured to cool the heat generated from the circular battery cells or apply heat to the circular battery cells. A temperature control module (220-250) is provided. Here, the first battery module 210 and the second battery module 260 are disposed adjacent to each other so that the negative (-) pole directions of the included circular battery cells face each other.
[74]
The configuration of the battery pack 200 will be described in more detail below.
[75]
In addition, the first battery module 210 and the second battery module 260 are composed of a plurality of circular cells, and the plurality of circular cells are disposed in a horizontal shape to be stacked.
[76]
In addition, the plurality of circular cells may be configured as one battery module for each predetermined number and formed in a separate case. Here, the separate case is formed of a material having high thermal conductivity.
[77]
In addition, the electrode arrangement directions of the cells of the first battery module 210 and the second battery module 260 are arranged in the same direction so that the temperature of all battery cells can be uniformly controlled.
[78]
In addition, the temperature control modules 220 to 250 include a first heat transfer frame 220 and a second heat transfer frame 250 disposed adjacent to the first battery module 210 and the second battery module 260, respectively. And, between the first heat transfer frame 220 and the second heat transfer frame 250, a cooling member 230 for cooling the heat transferred by the first and second heat transfer frames, and the first and second heat transfer frames. A heating member 240 for applying heat to a heat transfer frame is provided, and the first and second heat transfer frames transfer heat generated from the battery cells to the cooling member 230 and from the heating member 240 The generated heat is transferred to the battery cells.
[79]
In addition, in the case of performing only cooling, only the cooling module that cools the heat generated from the circular battery cells is not the temperature control module 220 to 250 between the first battery module 210 and the second battery module 260. Is composed.
[80]
The cooling module includes a first heat transfer frame and a second heat transfer frame disposed adjacent to the first battery module and the second battery module, respectively, and first and second heat transfer frames are transferred between the first and second heat transfer frames. A cooling member for cooling the heat is provided, and the first and second heat transfer frames transfer heat generated from the battery cells to the cooling member.
[81]
To describe the temperature control modules 220 to 250 in more detail, a wide surface of the first and second heat transfer frames 220 and 250 is respectively the first battery module 210 or the second battery module It is disposed adjacent to 260 and the other surface is disposed adjacent to the cooling member 230 or the heating member 240 so that a plurality of battery cells can be cooled or heated by a single temperature control module.
[82]
In addition, the first and second heat transfer frames 220 and 250 are formed in a plate shape so that the negative (-) pole of the plurality of battery cells in the first battery module 210 or the second battery module 260 It is formed in a contact shape.
[83]
In addition, the first heat transfer frame 220 and the second heat transfer frame 250 may be made of a material having high heat conduction characteristics. As an embodiment, aluminum may be used as a material, but is not limited thereto.
[84]
In addition, the cooling member 230 is located adjacent to the first or second heat transfer frame 220, 250 to transfer the heat generated by the heating member 240 to the first or second heat transfer frame 220, 250) or cooling the heat transferred from the first or second heat transfer frames 220, 250.
[85]
In addition, the cooling member 230 is formed in the form of a plate, uses a liquid cooler or a metal cooler, and is made of a thermally conductive material on the outside so that heat can quickly enter or transfer from the outside.
[86]
In addition, the cooling member 230 is electrically connected to the BMS that controls the battery pack so that it can be driven through the BMS when the temperature of the battery pack exceeds a predetermined temperature.
[87]
In addition, the heating member 240 is positioned adjacent to the left or right side of the cooling member 230 to apply heat to the cooling member 230 and the first or second heat transfer frames 220, 250, or Alternatively, the heat transferred from the second heat transfer frames 220 and 250 is transferred to the cooling member 230.
[88]
In addition, the heating member 240 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 rapidly discharged or transferred to the outside.
[89]
In addition, the heating member 240 is electrically connected to the BMS controlling the battery pack so that it can be driven through the BMS when the temperature of the battery pack is less than a predetermined temperature.
[90]
That is, when the cooling member 230 is driven, the heating member 240 functions as a heat transfer configuration, and when the heating member 240 is driven, the cooling member 230 functions as a heat transmission configuration.
[91]
In addition, the battery pack includes a lower plate 270 positioned under the first battery module 210, the second battery module 260, and the temperature control module 220-250, and the first battery module 210 , The second battery module 260 and the temperature control module (220 ~ 250) is positioned above the upper cover 280 is configured to be coupled to the lower plate (270) is further included.
[92]
In more detail, a temperature control module 220 to 250 is formed in the center of the lower plate 270 to allow cooling or heating according to the temperature of the battery pack, and the upper cover 280 includes the lower plate (270) The temperature control module (220-250) formed in the center is formed at a position to prevent over-pressing (281) is disposed.
[93]
The overpressurization protrusion 281 allows the temperature control modules 220 to 250 to be protected from external impact.
[94]
[95]
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.
[96]
[97]
[Explanation of code]
[98]
100: battery pack
[99]
110: left battery module
[100]
120: left heat transfer frame
[101]
130: cooling member
[102]
140: right heat transfer frame
[103]
150: right battery module
[104]
160: lower plate
[105]
170: top cover
[106]
171: overpressure prevention projection
Claims
[Claim 1]
A left battery module 110 composed of a plurality of circular cells and in which a plurality of circular cells are continuously arranged in the width direction; A left heat transfer frame 120 positioned adjacent to the right side of the left battery module to transfer heat generated from the circular cell; A cooling member 130 positioned adjacent to the left heat transfer frame to cool heat transferred from the left heat transfer frame; And a right heat transfer frame 140 positioned adjacent to the right side of the cooling member to transfer heat to the cooling member. And a right battery module 150 positioned adjacent to the right side of the right heat transfer frame, composed of a plurality of circular cells, and in which a plurality of circular cells are continuously arranged in the width direction. Battery pack having a two-way cooling structure, characterized in that configured to include.
[Claim 2]
The battery pack according to claim 1, wherein the plurality of circular cells of the left battery module are arranged in one direction in a positive (+) pole on a left side and a negative (-) pole on a right side.
[Claim 3]
The battery pack of claim 1, wherein the plurality of circular cells of the right battery module are arranged in one direction in a negative (-) pole on a left side and a positive (+) pole on a right side.
[Claim 4]
The battery pack as set forth in claim 1, wherein the battery pack comprises: a lower plate positioned under the left battery module, a left heat transfer frame, a cooling member, a right heat transfer frame, and a right battery module; And an upper cover positioned above the left battery module, the left heat transfer frame, the cooling member, the right heat transfer frame, and the right battery module and coupled to the lower plate. A battery pack having a two-way cooling structure, characterized in that it is configured to further include.
[Claim 5]
The method according to claim 4, wherein the upper cover, the left heat transfer frame, the cooling member, and the over-pressing prevention protrusion disposed at a position corresponding to the right heat transfer frame; A battery pack having a two-way cooling structure, characterized in that formed.
[Claim 6]
A first battery module in which a plurality of circular battery cells are continuously arranged in a width direction, and a negative (-) electrode and a positive (+) electrode are arranged in the same direction; A second battery module in which a plurality of circular battery cells are continuously arranged in a width direction, and a negative (-) electrode and a positive (+) electrode are arranged in the same direction; The first battery module and the second battery module are disposed adjacent to each other so that the negative (-) pole directions of the included circular battery cells face each other, and between the first battery module and the second battery module, the circular battery cells A cooling module for cooling generated heat; A battery pack having a two-way cooling structure, characterized in that it comprises a.
[Claim 7]
The method according to claim 6, wherein the cooling module includes a first heat transfer frame and a second heat transfer frame disposed adjacent to each of the first and second battery modules, and between the first and second heat transfer frames. Is provided with a cooling member that cools the heat transferred by the first and second heat transfer frames, and the first and second heat transfer frames transfer heat generated from the battery cells to the cooling member. Battery pack with.
[Claim 8]
The apparatus of claim 6, wherein the battery pack comprises: a lower plate positioned under the first battery module, the second battery module, and the cooling module; And an upper cover positioned above the first battery module, the second battery module, and the cooling module and coupled to the lower plate. A battery pack having a two-way cooling structure, characterized in that it is configured to further include.
[Claim 9]
The method as set forth in claim 8, wherein the upper cover comprises: an overpressurization protrusion disposed at a position corresponding to the cooling module; A battery pack having a two-way cooling structure, characterized in that formed.
[Claim 10]
The battery pack of claim 7, wherein the cooling member is formed in a plate shape and uses a liquid cooler or a metal cooler.
[Claim 11]
The battery pack of claim 7, wherein the cooling member is made of a thermally conductive material.
[Claim 12]
The battery pack according to claim 7, wherein the battery pack further includes a heating member on the left or right side of the cooling member.
[Claim 13]
The battery pack as set forth in claim 12, wherein the heating member is formed in a plate shape and uses a liquid heater or a metal heater.
[Claim 14]
The battery pack of claim 12, wherein the heating member is made of a thermally conductive material.