High-current battery with high heat dissipation performance and battery module

Abstract

The utility model provides a high-current battery with high heat dissipation performance and a battery module. The high-current battery with high heat dissipation performance comprises a battery cell and a tab, the tab is a wide bent tab, the wide bent tab is arranged on one side of the battery cell, and a mounting cavity is formed by the wide bent tab and the battery cell; the high-current battery with high heat dissipation performance further comprises a heat dissipation assembly, the heat dissipation assembly is arranged in the mounting cavity and comprises a metal heat dissipation sheet, a first heat-conducting insulating rubber layer and a second heat-conducting insulating rubber layer, and the first heat-conducting insulating rubber layer is connected with the wide-bending tab; the first heat-conducting insulating rubber layer is connected with the second heat-conducting insulating rubber layer through the metal radiating fin; and the second heat-conducting insulating rubber layer is connected with the battery cell. According to the battery, due to the fact that the heat dissipation assembly is located in the installation cavity, rapid heat dissipation of the tab position is achieved, the wide-bending tab is adopted, the overcurrent capacity of the wide-bending tab is improved, it is guaranteed that the large-current battery with the high heat dissipation performance has large overcurrent, and the battery is particularly suitable for being applied to a starting power supply.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a high-current battery and a battery module with high heat dissipation performance. Background Art

[0002] At present, the battery module consists of a shell and multiple battery cells, which are mainly connected in series or in parallel to form a whole battery pack installed in the shell, also known as a battery module. However, since multiple battery cells are installed in a relatively closed shell, it is easy to have poor heat dissipation inside.

[0003] In order to solve the above technical problems, a new battery module has appeared on the market. For example, Chinese patent number CN 203760591 U discloses a liquid-cooled battery pack system, which mainly achieves heat dissipation of the battery pack by immersing the battery module in a cooling insulating liquid and adding a radiator. However, since it uses a cooling insulating liquid, it has high sealing requirements and is prone to leakage under the action of some strong external forces.

[0004] To this end, some scholars have developed a new type of battery module. For example, Chinese Patent No. 202310882663.X discloses a phase change material heat sink coated with thermally conductive silicone and a battery thermal management system, and specifically discloses a composite heat sink and several battery cells; the composite heat sink includes thermally conductive silicone and a composite phase change material, and the thermally conductive silicone is coated on the surface of the phase change material; the battery cells and the composite heat sink are alternately bonded in a sandwich structure. Because it uses thermally conductive silicone to coat the surface of the phase change material plate, the phase change material is completely confined inside the thermally conductive silicone shell, which fundamentally solves the leakage problem of the existing composite phase change material after liquefaction.

[0005] However, when the battery module is operating normally, the connection between the tab and the cell usually generates more heat, that is, the tab is prone to heat accumulation. Figure 1 and Figure 2 It can be seen that since the composite heat sink is completely filled in the gap between two adjacent battery cells, rapid heat dissipation of the tabs cannot be achieved, and the problem of poor heat dissipation still exists. Utility Model Content

[0006] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a method for achieving rapid heat dissipation at the pole ear position, and reduce the wear between the metal heat sink, the wide bent pole ear and the battery cell, thereby ensuring the product quality of the high-current battery with high heat dissipation and the overall structure of the high-current battery with high heat dissipation at higher temperatures is not easily deformed, and adopts a wide bent pole ear to improve the current capacity of the wide bent pole ear to ensure that the high-current battery with high heat dissipation has a large overcurrent, and is particularly suitable for high-current batteries and battery modules with high heat dissipation in starting power applications.

[0007] The purpose of this disclosure is achieved through the following technical solutions:

[0008] A high-current battery with high heat dissipation, including a battery cell and a tab.

[0009] The electrode tab is a wide bent electrode tab, which is arranged on one side of the battery cell and forms a mounting cavity with the battery cell;

[0010] The high-current battery with high heat dissipation also includes a heat dissipation component, which is arranged in the installation cavity. The heat dissipation component includes a metal heat sink, a first thermally conductive insulating adhesive layer and a second thermally conductive insulating adhesive layer. The first thermally conductive insulating adhesive layer is connected to the wide bent pole ear; the first thermally conductive insulating adhesive layer is connected to the second thermally conductive insulating adhesive layer through the metal heat sink; the second thermally conductive insulating adhesive layer is connected to the battery core.

[0011] In one embodiment, the wide bent pole ear includes a first wide sub-ear, a second wide sub-ear and a narrow sub-ear, the first end of the first wide sub-ear is connected to the positive terminal of the battery cell and / or the negative terminal of the battery cell, the second end of the first wide sub-ear and the second end of the second wide sub-ear form a right-angle bend portion, the second end of the second wide sub-ear is connected to the narrow sub-ear, and the first wide sub-ear, the second wide sub-ear and the second wide sub-ear are connected together to form the installation cavity; the narrow sub-ear is connected to the first thermally conductive insulating adhesive layer.

[0012] In one embodiment, a heat dissipation hollow area is formed between the narrow sub-ear and the second wide sub-ear.

[0013] In one embodiment, the number of the heat dissipation hollow areas is two, and the two heat dissipation hollow areas are located on both sides of the narrow ear; and / or,

[0014] The area of ​​the heat dissipation hollow area accounts for 1 / 5 to 1 / 2 of the total area of ​​the narrow ears.

[0015] In one embodiment, the widths of the first wide sub-ear and the second wide sub-ear are both equal to the width of the battery core.

[0016] In one of the embodiments, the metal heat sink is disposed adjacent to the mounting cavity and close to the positive terminal or the negative terminal of the battery cell.

[0017] In one embodiment, the bottom end of the metal heat sink is lower than the bottom of the battery core, the bottom end of the metal heat sink is higher than the bottom of the narrow ear, and the top end of the metal heat sink is higher than the top of the battery core.

[0018] In one embodiment, the metal heat sink is an aluminum plate heat sink or a copper plate heat sink.

[0019] A battery module comprises a plurality of high-current batteries with high heat dissipation as described in any of the above embodiments.

[0020] In one embodiment, the battery module also includes a shell and multiple third thermally conductive insulating adhesive layers, each of the third thermally conductive insulating adhesive layers is arranged between the wide bent pole ears of each two adjacent high-heat dissipation large-current batteries, and the third thermally conductive insulating adhesive layer is used to prevent short circuit between each two adjacent high-heat dissipation large-current batteries.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] 1) Since the wide bent pole ear is arranged on one side of the battery core and forms an installation cavity with the battery core, the installation cavity can accommodate the heat dissipation component; and since the heat dissipation component includes a metal heat sink, a first thermally conductive insulating adhesive layer and a second thermally conductive insulating adhesive layer, the first thermally conductive insulating adhesive layer is connected to the wide bent pole ear, which can effectively avoid the problem of short circuit between the metal heat sink and the wide bent pole ear on the one hand, and can improve the thermal conductivity of the first thermally conductive insulating adhesive layer to the wide bent pole ear on the other hand, which is conducive to the rapid transfer of heat to the metal heat sink, so as to achieve faster heat dissipation of the wide bent pole ear; and since the second thermally conductive insulating adhesive layer is connected to the battery core, which can effectively avoid the problem of short circuit between the metal heat sink and the battery core on the one hand, and can improve the thermal conductivity of the second thermally conductive insulating adhesive layer to the wide bent pole ear on the other hand, which is conducive to the rapid transfer of heat to the metal heat sink, further achieving rapid heat dissipation of the wide bent pole ear, and effectively avoiding the problem that traditional battery modules cannot achieve rapid heat dissipation at the pole ear position. In addition, the added first thermally conductive insulating adhesive layer and the second thermally conductive insulating adhesive layer can effectively reduce the wear between the metal heat sink, the wide bent pole ear and the battery cell, thereby ensuring the product quality of the high-current battery with high heat dissipation.

[0023] 2) Since the metal heat sink has good thermal conductivity and will not deform after absorbing heat, it ensures that the high-current battery with high heat dissipation can still maintain good support at higher temperatures, thereby ensuring the overall structure of the high-current battery with high heat dissipation, and effectively avoiding the problem of the traditional phase change material heat sink being easily deformed after phase change liquefaction, resulting in a decrease in support force or deformation of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present disclosure and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 This is a schematic structural diagram of a high-current battery with high heat dissipation in one direction according to an embodiment of the utility model;

[0026] Figure 2 A schematic diagram of the structure of a high-current battery with high heat dissipation in another direction according to an embodiment of the utility model

[0027] Figure 3 for Figure 2 A partial enlarged view shown in the middle A;

[0028] Figure 4 It is a partial structural schematic diagram of a battery module according to an embodiment of the utility model.

[0029] Figure numerals: 10, high-current battery with high heat dissipation; 100, battery cell; 110, bottom of battery cell; 120, top of battery cell; 200, pole ear; 210, first wide sub-ear; 220, second wide sub-ear; 230, narrow sub-ear; 240, right-angle bend; 250, heat dissipation hollow area; 300, installation cavity; 400, heat dissipation component; 410, metal heat sink; 411, bottom end of metal heat sink; 412, top end of metal heat sink; 420, first thermally conductive insulating adhesive layer; 430, second thermally conductive insulating adhesive layer; 1, battery module. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present disclosure, the present disclosure will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present disclosure are given in the drawings. However, the present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present disclosure more thoroughly and comprehensively understood.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present disclosure. The terms used herein in the specification of the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0033] In order to better understand the technical solutions and beneficial effects of the present invention, the present invention is further described in detail below in conjunction with specific embodiments:

[0034] like Figures 1 to 3 As shown, a high-current battery 10 with high heat dissipation in one embodiment includes a battery cell 100 and a tab 200, wherein the tab 200 is a wide bent tab 200, and the wide bent tab 200 is arranged on one side of the battery cell 100, and forms an installation cavity 300 with the battery cell 100; the high-current battery 10 with high heat dissipation also includes a heat dissipation component 400, and the heat dissipation component 400 is arranged in the installation cavity 300, and the heat dissipation component 400 includes a metal heat sink 410, a first thermally conductive insulating adhesive layer 420 and a second thermally conductive insulating adhesive layer 430, wherein the first thermally conductive insulating adhesive layer 420 is connected to the wide bent tab 200; the first thermally conductive insulating adhesive layer 420 is connected to the second thermally conductive insulating adhesive layer 430 through the metal heat sink 410; and the second thermally conductive insulating adhesive layer 430 is connected to the battery cell 100.

[0035] It can be understood that since the wide bent pole ear 200 is arranged on one side of the battery core 100 and forms an installation cavity 300 with the battery core 100, the installation cavity 300 can accommodate the heat dissipation component 400; and since the heat dissipation component 400 includes a metal heat sink 410, a first thermally conductive insulating adhesive layer 420 and a second thermally conductive insulating adhesive layer 430, and the first thermally conductive insulating adhesive layer 420 is connected to the wide bent pole ear 200, on the one hand, it can effectively avoid the problem of short circuit between the metal heat sink 410 and the wide bent pole ear 200, and on the other hand, it can improve the thermal conductivity of the first thermally conductive insulating adhesive layer 420 to the wide bent pole ear 200, which is conducive to the rapid transfer of heat to the metal heat sink 4 10, in order to achieve faster heat dissipation of the wide bent pole ear 200; and because the surface of the battery cell 100 is an aluminum-plastic film, it has a certain conductivity. Therefore, a second heat-conducting insulating adhesive layer 430 is added between the metal heat sink 410 and the battery cell 100. On the one hand, it can effectively avoid the problem of short circuit between the metal heat sink 410 and the battery cell 100, and on the other hand, it can improve the thermal conductivity of the second heat-conducting insulating adhesive layer 430 to the wide bent pole ear 200, which is conducive to the rapid transfer of heat to the metal heat sink 410, and further achieves rapid heat dissipation of the wide bent pole ear 200, effectively avoiding the problem that the traditional battery module 1 cannot achieve rapid heat dissipation of the pole ear 200. In addition, the added first heat-conducting insulating adhesive layer 420 and the second heat-conducting insulating adhesive layer 430 can effectively reduce the wear between the metal heat sink 410, the wide bent pole ear 200 and the battery cell 100, thereby ensuring the product quality of the high-current battery 10 with high heat dissipation.

[0036] Furthermore, since the metal heat sink 410 has good thermal conductivity and will not deform after absorbing heat, it ensures that the high-current battery 10 with high heat dissipation can still maintain good support at higher temperatures, thereby ensuring the overall structure of the high-current battery 10 with high heat dissipation, and effectively avoiding the problem of the traditional phase change material heat sink being easily deformed after phase change liquefaction, resulting in a decrease in supporting force or deformation of the battery.

[0037] It can also be understood that the wide bent tab 200 is used to further improve the current carrying capacity of the wide bent tab 200 to ensure that the high-current battery 10 with high heat dissipation has a large overcurrent, which is particularly suitable for the application of starting power supply.

[0038] like Figure 2 and Figure 3As shown, in one embodiment, the wide bent pole ear 200 includes a first wide sub-ear 210, a second wide sub-ear 220 and a narrow sub-ear 230, the first end of the first wide sub-ear 210 is connected to the positive terminal of the battery cell 100 and / or the negative terminal of the battery cell 100, the second end of the first wide sub-ear 210 and the second end of the second wide sub-ear 220 form a right-angle bending portion 240, the second end of the second wide sub-ear 220 is connected to the narrow sub-ear 230, and the first wide sub-ear 210, the second wide sub-ear 220 and the second wide sub-ear 220 are connected together to form the installation cavity 300; the narrow sub-ear 230 is connected to the first thermally conductive insulating adhesive layer 420.

[0039] It can be understood that, since the second end of the first wide sub-ear 210 and the second end of the second wide sub-ear 220 form a right-angle bend portion 240, the wide bend setting of the first wide sub-ear 210 and the second wide sub-ear 220 is realized, and since the second end of the second wide sub-ear 220 is connected to the narrow sub-ear 230, the connection between the second sub-ear and the third sub-ear is realized, so that the first wide sub-ear 210, the second sub-ear and the third sub-ear can be connected together to form the installation cavity 300, so that the installation cavity 300 can well accommodate the heat dissipation component 400, and since the narrow sub-ear 230 is connected to the first thermally conductive insulating adhesive layer 420, the first thermally conductive insulating adhesive layer 420 can insulate the narrow sub-ear 230 from the metal heat sink 410, effectively avoiding a short circuit between the wide bent pole ear 200 and the metal heat sink 410.

[0040] like Figure 3 As shown, in one embodiment, a heat dissipation hollow area 250 is formed between the narrow ear 230 and the second wide ear 220. It can be understood that the added heat dissipation hollow area 250 increases the contact area between the metal heat sink 410 and the air, thereby accelerating the heat circulation of the metal heat sink 410, and effectively avoiding the problem of slow heat circulation of the metal heat sink 410 due to being blocked by the wide bent pole ear 200. It should be noted that since the heat dissipation hollow area 250 is formed between the narrow ear 230 and the second wide ear 220, the second wide ear 220 can well meet the large current flow area requirements of the positive and negative terminals of the battery cell 100, while also reducing the cost of the narrow ear 230 and improving the utilization rate of the flow area of ​​the narrow ear 230.

[0041] In order to better meet the heat dissipation of the wide bent tab 200 under high current, Figure 3As shown, in one embodiment, the number of the heat dissipation hollow areas 250 is two, and the two heat dissipation hollow areas 250 are located on both sides of the narrow sub-ear 230; so that heat dissipation hollow areas 250 are formed on both sides of the narrow sub-ear 230, so as to better meet the heat dissipation of the wide bent pole ear 200 under large current, so as to better adapt to the application of starting power supply.

[0042] In a preferred embodiment, the area of ​​the heat dissipation hollow area 250 accounts for 1 / 5 to 1 / 2 of the total area of ​​the narrow sub-ear 230, so as to ensure that the heat dissipation hollow area 250 and the total area of ​​the narrow sub-ear 230 are more appropriate, and the heat dissipation of the wide bent pole ear 200 under high current is better met. Specifically, the ratio of the area of ​​the heat dissipation hollow area 250 to the total area of ​​the narrow sub-ear 230 can be 1 / 5, 1 / 4, 1 / 3, 1 / 2, etc., and those skilled in the art can make a selection based on the actual high-current battery 10 with high heat dissipation, and no specific limitation is made here.

[0043] In a preferred embodiment, the widths of the first wide sub-ear 210 and the second wide sub-ear 220 are both equal to the width of the battery cell 100, which satisfies the large current discharge design of the wide bent pole ear 200 to the greatest extent, and ensures that the wide bent pole ear 200 does not protrude on both sides of the battery cell 100, thereby ensuring the flatness of the high-current battery 10 with high heat dissipation, thereby ensuring the flatness after subsequent assembly into the battery module 1.

[0044] In one embodiment, the metal heat sink 410 is disposed adjacent to the mounting cavity 300 and close to the positive terminal or negative terminal of the battery cell 100. It can be understood that by disposing the metal heat sink 410 adjacent to the mounting cavity 300 and close to the positive terminal or negative terminal of the battery cell 100, the metal heat sink 410 is closer to the connection between the wide bent pole tab 200 and the positive terminal or negative terminal of the battery cell 100, so that the metal heat sink 410 can quickly dissipate the heat at the connection between the wide bent pole tab 200 and the positive terminal or negative terminal of the battery cell 100, so as to avoid the phenomenon of poor heat dissipation caused by excessive heat accumulation at the connection between the wide bent pole tab 200 and the positive terminal or negative terminal of the battery cell 100.

[0045] like Figure 3As shown, in one embodiment, the bottom end 411 of the metal heat sink is lower than the bottom 110 of the battery cell, and the bottom end 411 of the metal heat sink is higher than the bottom of the narrow ear 230, and the top end 412 of the metal heat sink is higher than the top 120 of the battery cell. It can be understood that since the bottom end 411 of the metal heat sink is lower than the bottom 110 of the battery cell, and the bottom end 411 of the metal heat sink is higher than the bottom of the narrow ear 230, the bottom of the metal heat sink 410 is located between the bottom 110 of the battery cell and the bottom of the narrow ear 230, that is, the bottom of the metal heat sink 410 is not protruding from the bottom 110 of the battery cell, so as to ensure that the bottom of the battery module 1 formed after subsequent assembly can maintain a high degree of flatness, and is convenient for users to assemble; and the top end 412 of the metal heat sink is protruding from the top 120 of the battery cell, which not only increases the heat dissipation area of ​​the metal heat sink, but also facilitates the connection of the metal heat sink 410 with an external heat sink.

[0046] In one of the embodiments, the first thermally conductive insulating adhesive layer 420 is greater than or equal to the contact area between the metal heat sink 410 and the wide bent pole ear 200, so as to achieve a comprehensive insulation effect between the metal heat sink 410 and the wide bent pole ear 200; similarly, the area of ​​the second thermally conductive insulating adhesive layer 430 is greater than or equal to the contact area between the metal heat sink 410 and the battery cell 100, so as to achieve a comprehensive insulation effect between the metal heat sink 410 and the battery cell 100, thereby ensuring the safety of use of the high-current battery 10 with high heat dissipation while meeting the high heat dissipation of the high-current battery 10 with high heat dissipation.

[0047] Specifically, in one embodiment, the metal heat sink 410 is an aluminum plate heat sink or a copper plate heat sink to achieve rapid heat dissipation of the wide bent tab 200 .

[0048] The present disclosure also provides a battery module 1, such as Figure 4 As shown, it includes a plurality of high-current batteries 10 with high heat dissipation as described in any of the above embodiments. Specifically, in one of the embodiments, the battery module 1 also includes a shell (not shown) and a plurality of third heat-conducting insulating adhesive layers (not shown), each of which is disposed between the wide bent tabs 200 of each two adjacent high-current batteries 10 with high heat dissipation, and the third heat-conducting insulating adhesive layer is used to prevent each two adjacent high-current batteries 10 with high heat dissipation from short-circuiting.

[0049] It can be understood that by adding a third thermally conductive insulating adhesive layer between the wide bent pole ears 200 of two adjacent high-heat dissipation large-current batteries 10, on the one hand, the third thermally conductive insulating adhesive layer can prevent each two adjacent high-heat dissipation large-current batteries 10 from short-circuiting, and on the other hand, the third thermally conductive insulating adhesive layer can also transfer the heat of each two adjacent wide bent pole ears 200 to the air, so as to achieve heat dissipation of the two wide bent pole ears 200, further improving the heat dissipation of the high-heat dissipation large-current battery 10.

[0050] In one embodiment, the first thermally conductive insulating adhesive layer, the second thermally conductive insulating adhesive layer and the third thermally conductive insulating adhesive layer are all thermally conductive silicone insulating adhesive layers, and the thermally conductive silicone insulating adhesive layers belong to the prior art.

[0051] In one of the embodiments, the shell is provided with a plurality of heat dissipation insulation slots, each of which is arranged in one-to-one correspondence with each metal heat sink 410, so that the metal heat sinks 410 of a plurality of high-current batteries 10 with high heat dissipation can respectively pass through the heat dissipation insulation slots, and each metal heat sink 410 is at least partially protruded from the heat dissipation insulation slot so that the metal heat sink 410 can be connected to an external heat sink.

[0052] Compared with the prior art, the present invention has at least the following advantages:

[0053] 1) Since the wide bent pole ear 200 is arranged on one side of the battery core 100 and forms an installation cavity 300 with the battery core 100, the installation cavity 300 can accommodate the heat dissipation component 400; and since the heat dissipation component 400 includes a metal heat sink 410, a first thermally conductive insulating adhesive layer 420 and a second thermally conductive insulating adhesive layer 430, and the first thermally conductive insulating adhesive layer 420 is connected to the wide bent pole ear 200, on the one hand, the problem of short circuit between the metal heat sink 410 and the wide bent pole ear 200 can be effectively avoided, and on the other hand, the thermal conductivity of the first thermally conductive insulating adhesive layer 420 to the wide bent pole ear 200 can be improved. It is conducive to the rapid transfer of heat to the metal heat sink 410, so as to achieve faster heat dissipation of the wide bent pole ear 200; and because the second heat-conducting insulating adhesive layer 430 is connected to the battery cell 100, on the one hand, it can effectively avoid the problem of short circuit between the metal heat sink 410 and the battery cell 100, and on the other hand, it can improve the thermal conductivity of the second heat-conducting insulating adhesive layer 430 to the wide bent pole ear 200, which is conducive to the rapid transfer of heat to the metal heat sink 410, and further achieves rapid heat dissipation of the wide bent pole ear 200, effectively avoiding the problem that the traditional battery module 1 cannot achieve rapid heat dissipation of the pole ear 200. In addition, the additional first heat-conducting insulating adhesive layer 420 and the second heat-conducting insulating adhesive layer 430 can effectively reduce the wear between the metal heat sink 410, the wide bent pole ear 200 and the battery cell 100, thereby ensuring the product quality of the high-current battery 10 with high heat dissipation.

[0054] 2) Since the metal heat sink 410 has good thermal conductivity and will not deform after absorbing heat, it ensures that the high-current battery 10 with high heat dissipation can still maintain good support at higher temperatures, thereby ensuring the overall structure of the high-current battery 10 with high heat dissipation, and effectively avoiding the problem of the traditional phase change material heat sink being easily deformed after phase change liquefaction, resulting in a decrease in supporting force or deformation of the battery.

[0055] The above-mentioned embodiments only express several implementation methods of the present disclosure, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the disclosed patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present disclosure, and these all belong to the protection scope of the present disclosure. Therefore, the protection scope of the disclosed patent shall be subject to the attached claims.

Claims

1. A high-current battery with high heat dissipation, comprising a battery cell and a tab, characterized in that: The electrode tab is a wide bent electrode tab, which is arranged on one side of the battery cell and forms a mounting cavity with the battery cell; The high-current battery with high heat dissipation also includes a heat dissipation component, which is arranged in the installation cavity. The heat dissipation component includes a metal heat sink, a first thermally conductive insulating adhesive layer and a second thermally conductive insulating adhesive layer. The first thermally conductive insulating adhesive layer is connected to the wide bent pole ear; the first thermally conductive insulating adhesive layer is connected to the second thermally conductive insulating adhesive layer through the metal heat sink; the second thermally conductive insulating adhesive layer is connected to the battery core.

2. The high-current battery with high heat dissipation according to claim 1, characterized in that: The wide bent pole ear includes a first wide sub-ear, a second wide sub-ear and a narrow sub-ear, the first end of the first wide sub-ear is connected to the positive terminal of the battery cell and / or the negative terminal of the battery cell, the second end of the first wide sub-ear and the second end of the second wide sub-ear form a right-angle bend portion, the second end of the second wide sub-ear is connected to the narrow sub-ear, and the first wide sub-ear, the second wide sub-ear and the second wide sub-ear are connected together to form the installation cavity; the narrow sub-ear is connected to the first thermally conductive insulating adhesive layer.

3. The high-current battery with high heat dissipation according to claim 2, characterized in that: A heat dissipation hollow area is formed between the narrow sub-ear and the second wide sub-ear.

4. The high-current battery with high heat dissipation according to claim 3, characterized in that: The number of the heat dissipation hollow areas is two, and the two heat dissipation hollow areas are located on both sides of the narrow ear; and / or, The area of ​​the heat dissipation hollow area accounts for 1 / 5 to 1 / 2 of the total area of ​​the narrow ears.

5. The high-current battery with high heat dissipation according to claim 2, characterized in that: The widths of the first wide sub-ear and the second wide sub-ear are both equal to the width of the battery core.

6. The high-current battery with high heat dissipation according to claim 1, characterized in that: The metal heat sink is disposed adjacent to the mounting cavity and close to the positive terminal or the negative terminal of the battery cell.

7. The high-current battery with high heat dissipation according to any one of claims 2 to 5, characterized in that: The bottom end of the metal heat sink is lower than the bottom of the battery core, and the bottom end of the metal heat sink is higher than the bottom of the narrow ear, and the top end of the metal heat sink is higher than the top of the battery core.

8. The high-current battery with high heat dissipation according to claim 1, characterized in that: The metal heat sink is an aluminum plate heat sink or a copper plate heat sink.

9. A battery module, characterized in that: The invention comprises a plurality of high-current batteries with high heat dissipation as claimed in any one of claims 1 to 8.

10. The battery module according to claim 9, characterized in that: The battery module also includes a shell and multiple third thermally conductive insulating adhesive layers, each of which is arranged between the wide bent pole ears of each two adjacent high-heat dissipation high-current batteries, and the third thermally conductive insulating adhesive layer is used to prevent short circuit between each two adjacent high-heat dissipation high-current batteries.

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