Integrated busbar assembly and battery module

Abstract

The invention provides an integrated busbar assembly and a battery module. The integrated busbar assembly comprises an integrated busbar and a cooling plate, the integrated busbar comprises a busbar body and a structure support member. The busbar body and the cooling plate are arranged on a first surface in a first direction of the structural support member; one end of the busbar body in the first direction is used for being connected with a battery; the cooling plate is arranged on at least one side of the busbar body in the second direction, and the first direction is perpendicular to the second direction. According to the integrated busbar assembly, the cooling plate is arranged on the structure supporting piece of the integrated busbar, and the cooling plate and the busbar body are adjacently arranged and located at the same height position, so that stacking of the cooling plate and the integrated busbar is avoided, the thickness of the integrated busbar assembly is reduced, and the height of the battery module is effectively reduced; the mechanical strength of the cooling plate is effectively improved by supporting the cooling plate through the structural supporting piece.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to an integrated busbar assembly and a battery module. Background Art

[0002] The FPC (Flexible Printed Circuit) on the battery module, the plastic structural parts and the copper-aluminum busbar were originally three separate parts. FPC, also known as a flexible circuit board, is a highly reliable and flexible printed circuit board made of polyimide or polyester film as a substrate. It is mainly composed of an insulating substrate, a conductive layer and an adhesive. It is mainly used for signal transmission within the battery module, such as connecting battery cells, sensors and monitoring circuits, and transmitting battery status information (such as voltage, temperature, current, etc.) to the battery management system (BMS). With the continuous development of the new energy industry, the requirements for the integration of battery modules and battery pack systems are getting higher and higher, and CCS components have emerged. CCS (Cell Contact System): that is, an integrated busbar component, which integrates FPC with plastic structural parts, copper-aluminum busbars, etc., is a component that integrates multiple components together. CCS components are generally a structure that combines rigidity and flexibility. By integrating plastic structural parts, copper-aluminum busbars, etc. with FPC, it has good structural stability while ensuring a certain degree of flexibility. The CCS component not only has the signal transmission function, but also can realize the series and parallel connection of battery cells, connect battery cells and transmit electric energy. At the same time, it monitors the key parameters of the battery pack and realizes the safe management and protection of the battery pack through communication with the BMS system.

[0003] CCS components involve high voltage and large current. As the industry develops, higher requirements are placed on battery charge and discharge rates. Batteries or battery modules will generate more heat, and the heat generated needs to be dissipated in time so that the battery is always at an optimal operating temperature. At present, simply providing liquid cooling at the bottom of the battery module inside the battery can no longer meet the above battery heat dissipation needs.

[0004] Therefore, the battery module in the prior art adopts double-layer liquid cooling, and the top liquid cooling in the double-layer liquid cooling corresponds to the top of the water-cooled plate busbar. This results in a larger overall height of the battery module, which is not conducive to reducing the volume of the battery module, and its structure is relatively unstable, posing a safety hazard. Summary of the invention

[0005] Based on this, it is necessary to provide an integrated busbar assembly and battery module to address the above technical problems.

[0006] An integrated busbar assembly comprises: an integrated busbar and a cooling plate; the integrated busbar comprises a busbar body and a structural support member;

[0007] The busbar body and the cooling plate are arranged on a first surface of the structural support member in a first direction;

[0008] One end of the busbar body in the first direction is used to connect to a battery;

[0009] The cooling plate is disposed on at least one side of the busbar body in a second direction, and the first direction is perpendicular to the second direction.

[0010] In one of the embodiments, the thickness of the busbar body is smaller than the thickness of the cooling plate.

[0011] In one embodiment, an embedding groove is formed on the first surface of the structural support member, and the cooling plate is disposed in the embedding groove.

[0012] In one embodiment, the integrated busbar further includes a flexible circuit board, which is electrically connected to the busbar body. The flexible circuit board is disposed on the first surface of the structural support member, and the cooling plate is at least partially attached to the flexible circuit board.

[0013] In one embodiment, an embedding groove is formed on the first surface of the structural support member, the flexible circuit board is arranged in the embedding groove and adheres to the bottom of the embedding groove, the cooling plate is at least partially adhered to the side of the flexible circuit board facing away from the bottom of the embedding groove, and the cooling plate is arranged in the embedding groove.

[0014] In one of the embodiments, the surface of the cooling plate is provided with an insulating coating.

[0015] In one embodiment, the cooling plate includes a first plate body, a second plate body and a plurality of connecting plates, the first plate body and the second plate body are spaced apart from each other, the first plate body and the second plate body are connected through the connecting plates, a first water-cooling cavity is provided inside the first plate body, a second water-cooling cavity is provided inside the second plate body, a connecting cavity is provided inside the connecting plate, the first water-cooling cavity is connected with the second water-cooling cavity through the connecting cavity, the first plate body is provided with a water inlet, the second plate body is provided with a water outlet, and the busbar body includes a plurality of conductive members, each of which is respectively provided on a side of the first plate body away from the second plate body, a side of the second plate body away from the first plate body, and between the first plate body and the second plate body.

[0016] In one embodiment, the material of the structural support member is plastic; the manufacturing process of the structural support member includes any one of the following:

[0017] The structural support member is made by a vacuum forming process, and the busbar body is fixed on a first surface in a first direction of the structural support member by a hot riveting process;

[0018] The structural support member is manufactured by a hot pressing process, and the busbar body and the cooling plate are fixed on the structural support member by a hot pressing process during the hot pressing process of the structural support member.

[0019] In one of the embodiments, the cooling plate is connected to the structural support member via a thermally conductive gel.

[0020] A battery module includes a plurality of batteries and also includes the integrated busbar assembly described in any of the above embodiments.

[0021] The above-mentioned integrated busbar assembly and battery module avoid stacking of the cooling plate and the integrated busbar by arranging the cooling plate on the structural support of the integrated busbar, and arranging the cooling plate adjacent to the busbar body at the same height, so that the thickness of the integrated busbar assembly is reduced, thereby effectively reducing the height of the battery module. In addition, the mechanical strength of the cooling plate is effectively improved by supporting the cooling plate through the structural support, making the overall structure of the integrated busbar assembly and the battery module more solid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of a battery module in an embodiment;

[0023] Figure 2 is a schematic diagram of a three-dimensional exploded structure of a battery module in one embodiment;

[0024] Figure 3 It is a schematic diagram of the three-dimensional exploded structure of an integrated busbar assembly in one embodiment.

[0025] Description of reference numerals:

[0026] 10. Battery module; 100. Battery; 200. Integrated busbar assembly; 210. Integrated busbar; 220. Cooling plate; 230. Busbar body; 240. Structural support member; 250. Flexible circuit board; 221. First board body; 222. Second board body; 223. Connecting plate; 201. Water inlet; 202. Water outlet; 203. First avoidance hole; 301. Second avoidance hole; 205. Third avoidance hole; 300. Mica sheet; 241. Support member body; 242. Fixing portion; 206. Embedded groove. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0028] Embodiment 1

[0029] In this embodiment, Figures 1 to 3 As shown, an integrated busbar assembly 200 is provided, comprising: an integrated busbar 210 and a cooling plate 220; the integrated busbar 210 comprises a busbar body 230 and a structural support 240; the busbar body 230 and the cooling plate 220 are arranged on a first surface of the structural support 240 in a first direction; one end of the busbar body 230 in the first direction is used for connection with a battery 100; the cooling plate 220 is arranged on at least one side of the busbar body 230 in a second direction, and the first direction is perpendicular to the second direction.

[0030] In this embodiment, the busbar body 230 is used to connect with the electrode of the battery 100, and the structural support member 240 is disposed on the top of the battery 100. For ease of description, in each embodiment, the height direction of the battery 100 is defined as a first direction. Figure 1 The vertical direction is defined as the up-down direction, and the direction perpendicular to the height direction of the battery 100 is defined as the second direction. Figure 1 In the embodiment, the busbar body 230 and the cooling plate 220 are arranged on the side of the structural support 240 facing away from the battery 100, and the busbar body 230 and the cooling plate 220 are not stacked in the first direction, but are laid flat in the second direction, that is, the busbar body 230 and the cooling plate 220 are arranged adjacent to each other in the lateral direction, thus avoiding the increase in thickness caused by the cooling plate 220 stacked on the busbar body 230, and effectively reducing the height of the battery module 10. In addition, through the support of the structural support 240, the mechanical strength of the cooling plate 220 can be effectively improved.

[0031] In this embodiment, in order to realize the connection between the busbar body 230 and the electrodes of the battery 100, a plurality of connecting holes are opened on the first surface of the structural support body, and the connecting holes extend to the second surface of the structural support body opposite to the first surface. Each connecting hole is aligned with an electrode of the battery 100, and the width of the connecting hole is smaller than the width of the busbar body 230. The busbar body 230 is arranged on the first surface of the first direction of the structural support member 240, and is aligned with each of the connecting holes and covers the connecting holes. In this way, the electrodes of the battery 100 can pass through the connecting holes and connect with the busbar body 230.

[0032] In this embodiment, the cooling plate 220 is made of metal material and has good thermal conductivity. The busbar body 230 and the cooling plate 220 are insulated. For example, an insulating coating is provided on the surface of the cooling plate 220, so that the busbar body 230 and the cooling plate 220 can be insulated.

[0033] In this embodiment, the cooling plate 220 can not only dissipate heat and cool the battery 100 of the battery module 10, but also dissipate heat for the integrated busbar 210 because the cooling plate 220 is located on the structural support body of the integrated busbar 210. The cooling plate 220 and the busbar body 230 are arranged side by side, which can effectively reduce the heat transfer path and improve the heat dissipation efficiency.

[0034] In order to further reduce the height of the battery module 10 , in one embodiment, the thickness of the busbar body 230 is smaller than the thickness of the cooling plate 220 .

[0035] In this embodiment, the thickness of the busbar body 230 is relatively small, so that the overall height of the integrated busbar assembly 200 is reduced, and the maximum height of the integrated busbar 210 is the height of the cooling plate 220, thus ensuring that the height of the integrated busbar assembly 200 is not greater than the height of the cooling plate 220, which is conducive to further reducing the height of the battery module 10. In addition, it is worth mentioning that due to the large thickness of the cooling plate 220, the heat dissipation performance can be effectively improved.

[0036] In this embodiment, the height of the busbar body 230 protruding from the structural support member 240 is less than the height of the cooling plate 220 protruding from the structural support member 240. In this way, the overall height of the integrated busbar assembly 200 can be no higher than the height of the cooling plate 220, which is beneficial to further reduce the height of the battery module 10.

[0037] In order to better fix the cooling plate 220, in one embodiment, as Figure 3 As shown, an embedding groove 206 is formed on a first surface of the structural support member 240 , and the cooling plate 220 is disposed in the embedding groove 206 .

[0038] In this embodiment, the cooling plate 220 is embedded in the embedding groove 206, the shape of the embedding groove 206 matches the shape of the cooling plate 220, and the side wall of the embedding groove 206 abuts against the edge of the cooling plate 220. By embedding the cooling plate 220 in the embedding groove 206, the cooling plate 220 closely abuts against the side wall of the embedding groove 206. On the one hand, the cooling plate 220 can be firmly fixed on the structural support member 240, and on the other hand, the height of the cooling plate 220 on the structural support member 240 can be effectively reduced. In addition, the connection between the cooling plate 220 and the structural support member 240 is strengthened, which can make the overall structure of the integrated busbar assembly 200 and the battery module 10 more solid.

[0039] In one embodiment, see Figure 3 The integrated busbar 210 also includes a flexible circuit board 250, which is electrically connected to the busbar body 230, and the flexible circuit board 250 is arranged on the first surface of the structural support member 240, and the cooling plate 220 is at least partially attached to the flexible circuit board 250.

[0040] In this embodiment, the flexible circuit board (FPC) busbar body 230 is connected to collect and detect various electrical signals of the battery 100. The structural support 240 supports the flexible circuit board 250, which can support the FPC, make the structure more stable, and not easy to deform. The cooling plate 220 abuts against the flexible circuit board 250, so that the flexible circuit board 250 is located between the cooling plate 220 and the structural support 240. The cooling plate 220 and the structural support 240 jointly support and fix the flexible circuit board 250, so that the structure of the flexible circuit board 250 is more stable. In addition, the cooling plate 220 can also absorb the heat of the flexible circuit board 250, so that the heat dissipation effect of the flexible circuit board 250 is better.

[0041] In one embodiment, the flexible printed circuit board 250 abuts against a side of the cooling plate 220 facing the structural support member 240. In this embodiment, the flexible printed circuit board 250 is completely covered by the cooling plate 220, so that the heat of the flexible printed circuit board 250 is more efficiently absorbed by the cooling plate 220.

[0042] In one embodiment, Figure 3 As shown, an embedding groove 206 is opened on the first surface of the structural support member 240, the flexible circuit board 250 is arranged in the embedding groove 206 and is attached to the bottom of the embedding groove 206, the cooling plate 220 is at least partially attached to the side of the flexible circuit board 250 facing away from the bottom of the embedding groove 206, and the cooling plate 220 is arranged in the embedding groove 206.

[0043] In this embodiment, the flexible circuit board 250 and the cooling plate 220 are both arranged in the embedding groove 206, and the flexible circuit board 250 is arranged at the bottom of the embedding groove 206, and the cooling plate 220 is arranged at the top of the flexible circuit board 250. In this way, since the thickness of the flexible circuit board 250 is extremely small, the impact on the protruding height of the cooling plate 220 is very small, and the protruding height of the cooling plate 220 can be effectively avoided from being too high. In addition, by fixing the embedding groove 206, the flexible circuit board 250 and the cooling plate 220 can be more firmly arranged on the structural support 240.

[0044] In order to prevent the cooling plate 220 from being electrically conductive and short-circuited between the integrated busbar 210 , in one embodiment, an insulating coating is provided on the surface of the cooling plate 220 .

[0045] In this embodiment, by coating the surface of the cooling plate 220 with an insulating coating, the cooling plate 220 and the integrated busbar 210 can be effectively isolated, and conduction between the cooling plate 220 and the integrated busbar 210 can be avoided, thereby avoiding a short circuit. In order to further improve the insulation properties of the cooling plate 220, in one embodiment, the insulating coating includes a first insulating coating and a second insulating coating. The surface of the cooling plate 220 is provided with the first insulating coating, and the second insulating coating is provided on the outside of the first insulating coating. In this embodiment, the first insulating coating is an inherent insulating coating of the cooling plate 220, and the second insulating coating is an additional insulating coating added for integration in the integrated busbar assembly 200. By providing two layers of insulating coating, the insulation properties of the cooling plate 220 can be effectively improved, and the safety and reliability of the integrated busbar assembly 200 can be further improved.

[0046] In one embodiment, Figure 3 As shown, the cooling plate 220 includes a first plate body 221, a second plate body 222 and a plurality of connecting plates 223, the first plate body 221 and the second plate body 222 are arranged at intervals from each other, the first plate body 221 and the second plate body 222 are connected by each of the connecting plates 223, a first water-cooling cavity is arranged inside the first plate body 221, a second water-cooling cavity is arranged inside the second plate body 222, a connecting cavity is arranged inside the connecting plate 223, the first water-cooling cavity is communicated with the second water-cooling cavity through the connecting cavity, the first plate body 221 is provided with a water inlet 201, the second plate body 222 is provided with a water outlet 202, and the busbar body 230 includes a plurality of conductive members, each of which is respectively arranged on a side of the first plate body 221 away from the second plate body 222, a side of the second plate body 222 away from the first plate body 221, and between the first plate body 221 and the second plate body 222.

[0047] In this embodiment, the cooling plate 220 is also called a water-cooled plate. The cooling plate 220 is cooled and dissipated by cooling water. Specifically, the cold water enters the first water-cooling cavity of the first plate body 221 through the water inlet 201, and then flows from the first water-cooling cavity to the connecting cavity and the second water-cooling cavity in sequence, and flows out through the water outlet 202. When flowing through the first water-cooling cavity, the connecting cavity and the second water-cooling cavity, the heat of the cooling plate 220 is absorbed, thereby playing a role in cooling and lowering the temperature. In this embodiment, the multiple conductive members of the busbar body 230 are respectively used to connect the electrodes of the battery 100, and each conductive member is aligned with the connecting hole of the structural support body, and each conductive member is respectively located on the outer side of the first plate body 221, the outer side of the second plate body 222, and between the first plate body 221 and the second plate body 222. In addition, the first plate body 221, the connecting plate 223 and the second plate body 222 are connected, and an installation space is formed inside. The conductive member located between the first plate body 221 and the second plate body 222 is located in the installation space. In this way, the first plate body 221, the second plate body 222 and the connecting plate 223 divide each conductive member into different areas, and the first plate body 221, the second plate body 222 and the connecting plate 223 are used in different directions and different positions to approach the conductive member or contact the conductive member, thereby avoiding heat concentration of the conductive member, facilitating heat dissipation, and being able to more efficiently absorb the heat of each conductive member, thereby effectively improving the heat dissipation efficiency.

[0048] It is worth mentioning that the cooling plate 220 can be a plate-like structure, a tubular structure, or a structure of other shapes, and the present application does not limit this. It should be understood that the specific shape of the cooling plate 220 is not limited to a plate-like structure due to its name.

[0049] In one embodiment, the material of the structural support member 240 is plastic; the manufacturing process of the structural support member 240 includes any one of the following:

[0050] The structural support member 240 is made by a vacuum forming process, and the busbar body 230 is fixed on a first surface of the structural support member 240 in a first direction by a hot riveting process;

[0051] The structural support member 240 is manufactured by a hot pressing process, and the busbar body 230 and the cooling plate 220 are fixed on the structural support member 240 by a hot pressing process during the hot pressing process of the structural support member 240 .

[0052] In order to make the connection between the cooling plate 220 and the structural support member 240 more stable, in one embodiment, the cooling plate 220 is connected to the structural support member 240 via a thermally conductive gel.

[0053] In this embodiment, the structural support member 240 is also called a plastic structural member. The plastic structural member has the characteristics of high hardness and high toughness, and can effectively support the cooling plate 220, the busbar body 230 and the flexible circuit board 250. The plastic structural member also has insulating properties, which can effectively avoid short circuits and effectively improve the reliability and safety of the integrated busbar assembly 200.

[0054] In this embodiment, the structural support member 240 can be made by different plastic molding processes. In one embodiment, the structural support member 240 is made by a vacuum forming process, and the busbar body 230 is fixed on the first surface of the first direction of the structural support member 240 by a hot riveting process. In this embodiment, the cooling plate 220 is connected to the structural support member 240 by a thermally conductive gel.

[0055] In this embodiment, the structural support member 240 is made by the blister process. After the structural support member 240 is made, the busbar body 230 and the flexible circuit board 250 are fixed on the first surface of the first direction of the structural support member 240 by the hot riveting process, and then the cooling plate 220 is fixed on the structural support member 240 by using the thermal conductive gel. In this way, the busbar body 230 and the flexible circuit board 250 can be firmly fixed on the structural support member 240. In addition, the thermal conductive gel can make the cooling plate 220 fixedly installed on the structural support member 240, and provide good thermal conductivity for the structural support member 240 and the cooling plate 220, which can achieve good heat conduction, thereby making the overall heat dissipation efficiency of the integrated template assembly higher.

[0056] It is worth mentioning that when the cooling plate 220 is fixedly mounted on the structural support 240 by means of the thermal conductive gel, the thermal conductive gel should be avoided from being coated on the structural support 240 and the cooling plate 220 at a position corresponding to the explosion-proof valve of the battery 100 .

[0057] In one embodiment, the structural support member 240 is made by a hot pressing process, and the busbar body 230, the flexible circuit board 250 and the cooling plate 220 are fixed on the structural support member 240 by a hot pressing process during the hot pressing process of the structural support member 240.

[0058] In this embodiment, the structural support member 240 is pressed by a hot pressing process. During the pressing process of the structural support member 240, the busbar body 230, the flexible circuit board 250 and the cooling plate 220 are hot pressed in a conformal manner, so that the flexible circuit board 250 and the cooling plate 220 can be pressed into the recessed embedding groove 206, so that the flexible circuit board 250 and the cooling plate 220 can be firmly fixed on the structural support member 240. By pressing and assembling the integrated busbar assembly 200 by a hot pressing process, the assembly efficiency can be effectively improved, and the busbar body 230, the flexible circuit board 250 and the cooling plate 220 can be firmly installed on the structural support member 240. It is worth mentioning that during the hot pressing process, a welding position is reserved for the busbar body 230, which is convenient for welding the busbar body 230 and the flexible circuit board 250.

[0059] In order to further fix the busbar body 230, in one embodiment, a plurality of limiting grooves are opened on the first surface of the structural support member 240, and the busbar body 230 includes a plurality of conductive members, each of which is embedded in a limiting groove, and each of the limiting grooves is located on at least one side of the embedding groove 206.

[0060] In this embodiment, by embedding the conductive member of the busbar body 230 into the limiting groove, the connection between the busbar body 230 and the structural support member 240 can be made more stable. It is worth mentioning that the process of embedding the busbar body 230 into the limiting groove can be achieved by the hot riveting process or hot pressing process in the above embodiment. This embodiment will not be described in detail.

[0061] To further fix the cooling plate 220, in one embodiment, please refer again to Figure 3The structural support member 240 includes a support member body 241 and a plurality of fixing portions 242, the embedding groove 206 and the limiting groove are opened on the first surface of the support member body 241, the busbar body 230 and the cooling plate 220 are arranged on the first surface of the support member body 241, and the busbar body 230 is arranged in the limiting groove, and the cooling plate 220 is arranged in the embedding groove 206, and the two ends of each of the fixing portions 242 are respectively connected to the support member body 241, and the middle part of each of the fixing portions 242 abuts against the side of the cooling plate 220 facing away from the support member body 241. In this embodiment, one end of the fixing portion 242 is connected to the support member body 241, and the other end bypasses the cooling plate 220 and is connected to the support member, and the middle part is pressed against the side of the cooling plate 220 facing away from the support member body 241, and the cooling plate 220 is fixed by pressing the fixing portion 242 against the cooling plate 220, which can further fix the cooling plate 220. In one embodiment, both ends of each of the fixing portions 242 are respectively connected to the support body 241, and the middle portion of each of the fixing portions 242 abuts against the side of the connecting plate 223 facing away from the support body 241. By fixing the connecting plate 223, the first plate body 221 and the second plate body 222 can be fully pressed against the flexible circuit board 250, so that the cooling plate 220 is pressed against the support body 241 and the flexible circuit board 250 more stably.

[0062] It is worth mentioning that, in this embodiment, the connection between the fixing portion, the support body and the cooling plate can be achieved by the hot riveting process or the hot pressing process in the above embodiments.

[0063] Embodiment 2

[0064] In this embodiment, please combine Figure 1 and Figure 2 , a battery module 10 is provided, comprising a plurality of batteries 100 and an integrated busbar assembly 200 as described in any of the above embodiments.

[0065] In this embodiment, the battery module 10 includes a plurality of batteries 100, each battery 100 is arranged in an array, the integrated busbar assembly 200 is arranged on the top of the battery 100, the electrodes of the battery 100 are connected to the busbar body 230, and a cover plate is arranged on the side of the integrated busbar assembly 200 facing away from the battery 100. In one embodiment, the cover plate is a mica sheet 300.

[0066] In one embodiment, please combine Figures 2 to 3, the cooling plate 220 is provided with a first avoidance hole 203, the mica sheet 300 is provided with a second avoidance hole 301 corresponding to the first avoidance hole 203 of the cooling plate 220, that is, the first avoidance hole 203 is aligned with the second avoidance hole 301, in this embodiment, the structural support member 240 is provided with a third avoidance hole 205, and the third avoidance hole 205 is aligned with the first avoidance hole 203 and the second avoidance hole 301. The first avoidance hole 203, the second avoidance hole 301 and the third avoidance hole 205 are aligned with the explosion-proof valve on the battery 100, and the first avoidance hole 203, the second avoidance hole 301 and the third avoidance hole 205 are interconnected to form a vertical pressure relief channel, which provides a pressure relief channel for the explosion-proof valve and can prevent thermal runaway and heat spread.

[0067] In one embodiment, the cooling plate 220 includes a first plate body 221, a second plate body 222 and a plurality of connecting plates 223, wherein the first plate body 221 and the second plate body 222 are spaced apart from each other, the first plate body 221 and the second plate body 222 are connected by the connecting plates 223, a first water-cooling cavity is provided inside the first plate body 221, a second water-cooling cavity is provided inside the second plate body 222, a connecting cavity is provided inside the connecting plate 223, the first water-cooling cavity is communicated with the second water-cooling cavity through the connecting cavity, the first plate body 221 is provided with a water inlet 201, and the second plate The body 222 is provided with a water outlet 202, and the busbar body 230 includes a plurality of conductive parts, each of which is respectively arranged on a side of the first plate body 221 away from the second plate body 222, a side of the second plate body 222 away from the first plate body 221, and between the first plate body 221 and the second plate body 222. The first plate body 221 and the second plate body 222 are respectively aligned with the flexible circuit board 250 and abut against the flexible circuit board 250. In this embodiment, the connecting plate 223 is aligned with the area between the poles of the battery 100, and the connecting plate 223 avoids aligning with the explosion-proof valve area of ​​the battery 100.

[0068] In this embodiment, by arranging the cooling plate 220 on the structural support 240 of the integrated busbar 210, and arranging the cooling plate 220 adjacent to the busbar body 230 at the same height, stacking of the cooling plate 220 and the integrated busbar 210 is avoided, and the thickness of the integrated busbar assembly 200 is reduced, thereby effectively reducing the height of the battery module 10. In addition, the support of the cooling plate 220 by the structural support 240 effectively improves the mechanical strength of the cooling plate 220, making the overall structure of the integrated busbar assembly 200 and the battery module 10 more solid.

[0069] Embodiment 3

[0070] It is worth mentioning that CCS components involve high voltage and high current. As the industry develops, higher requirements are put forward for battery charge and discharge rates. Batteries or battery modules will generate more heat, and the generated heat needs to be dissipated in time so that the battery is always in an optimal working temperature state. At present, simply providing liquid cooling at the bottom of the battery module in the battery can no longer meet the above battery heat dissipation requirements;

[0071] Even if the battery module in the prior art adopts double-layer liquid cooling, the water cooling plate corresponding to the top liquid cooling in the double-layer liquid cooling is located above the busbar (busbar body), occupying the space in the Z direction (PS: At present, the water cooling on the CCS assembly is placed on the busbar. If the thickness of the busbar is m and the thickness of the water cooling plate is n, the thickness dimension occupied by the two in the Z direction is m+n, but this patent can achieve m≤n, and m<n is preferred, so that the height dimension of the two is always less than n, which is at least reduced by one m dimension compared with the prior art, that is, at least one busbar thickness dimension is reduced). Therefore, whether it is in accordance with the production route of battery-battery module-battery pack-power product / energy storage product, or the production route of battery-battery pack-power product / energy storage product, the space occupied in the Z direction can be reduced in turn, and more specifically, the volume space occupied can be reduced;

[0072] In the prior art, as the number of batteries stacked in the length direction of the module increases, the length of the corresponding water-cooling plate in the top liquid cooling will also increase. The water-cooling plate is connected to the battery pole by thermally conductive glue or thermally conductive structural glue. At this time, when encountering strong vibration and strong impact, the water-cooling plate reaches the endurance limit of vibration or impact, and cracks will appear in the middle of the water-cooling plate. The cracks further expand until the water-cooling plate breaks, causing a short circuit in the battery or battery module, posing a safety risk.

[0073] In this embodiment, the CCS component and the water-cooled plate in the prior art are integrated into a whole through the blister molding or hot pressing process to form a CCS component system. If the plastic structural parts adopt the blister molding process, the busbar and FPC are fixed to the plastic structural parts through the hot riveting process, the flow channel plate in the water-cooled plate and the plastic structural parts are connected by thermal conductive gel, and the flat plate in the water-cooled plate and the area between the battery pole (the battery explosion-proof valve area) are connected by thermal conductive gel. If the plastic structural parts adopt the hot pressing process, the busbar, FPC and the water-cooled plate are hot-pressed in accordance with the shape, and the welding position is reserved at the busbar. The overlapping positions of the flow channel plate and FPC in the water-cooled plate and the overlapping areas between the flat plate and the battery pole (the battery explosion-proof valve area) are all partially coated (non-complete coating can fix the water-cooled plate and maintain good thermal conductivity and heat dissipation effects), which is not shown in the figure;

[0074] The design of the water cooling plate can be flat, tubular or other special shapes to adapt to different installation spaces and heat dissipation requirements. The flat type is preferred. The water cooling plate is provided with an avoidance hole, and the battery explosion-proof valve on the corresponding bottom and the avoidance hole of the mica on the corresponding upper part form a vertical pressure relief channel to prevent thermal runaway and heat spread.

[0075] Through the above structure, the following effects can be achieved:

[0076] Since CCS components involve high voltage and high current, after the plastic parts in the CCS components are integrated with the water-cooled plate, the plastic parts can provide a good structural support skeleton with good insulation properties. At the same time, the water-cooled plate will be protected by an insulating coating for secondary insulation protection. This double protection can better prevent leakage and short circuit.

[0077] The plastic parts in the CCS components have good impact resistance. The CCS components and the water-cooling plate are integrated to form the CCS component system to ensure that the mechanical connection between the two is firm and reliable. Therefore, the integrated design of the CCS components and the water-cooling plate can provide solutions for some special application scenarios, such as applications in harsh environments such as strong vibration and strong impact.

[0078] There is good thermal contact between the CCS component and the water-cooled plate, for example, by filling the gap with materials such as thermally conductive silicone pads or thermally conductive adhesives or thermally conductive gels. At the same time, the water-cooled plate in the CCS component system maintains good thermal contact with the area between the two poles of the battery cell (excluding the location of the explosion-proof valve), such as by filling with thermally conductive adhesives or thermally conductive gels, so that the water-cooled plate in the CCS component system can form a double-layer liquid cooling with the water-cooled plate at the bottom of the battery module, and can also take away part of the heat generated by the CCS component during operation, ensuring that the temperature of the CCS component is always maintained within an optimal operating temperature range to improve its operating performance and reliability;

[0079] Traditional CCS components and water cooling plates are usually designed independently. The organic combination of CCS components and water cooling plates can reduce the heat transfer path, improve the heat dissipation efficiency, and also reduce the volume and weight of the system. In the field of new energy vehicles, the CCS component system composed of the integrated design of the two can improve the energy density and driving range of the battery pack, and also reduce the weight and cost of the whole vehicle;

[0080] The CCS component system designed by integrating the CCS component and the water cooling plate can meet smaller space restrictions. In this patent, the CCS component and the water cooling plate are arranged in an overlapping manner in the Z direction to reduce the space occupied in the Z direction (PS: Currently, the water cooling on the CCS component is placed on the busbar. If the thickness of the busbar is m and the thickness of the water cooling plate is n, the thickness dimension occupied by the two in the Z direction is m+n, but this patent can achieve m≤n, and m<n is preferred, so that the height dimension of the two is always less than n, which is at least one m dimension less than the prior art, that is, at least one busbar thickness dimension is reduced). It can provide a very effective solution in situations where there are strict restrictions on the height of the battery module or the height of the battery pack;

[0081] The integrated design of CCS components and water cooling plates can reduce the number of parts and assembly procedures, thus reducing production costs. In addition, the integrated design can also improve the reliability and stability of the system and reduce the cost of maintenance and replacement.

[0082] The plastic structural parts in the CCS assembly are formed by not completely covering the water-cooled plate with a hot pressing process, or the plastic structural parts are blister parts and the water-cooled plate are bonded with thermal conductive gel to form a CCS assembly system. The plastic structural parts provide a structural support skeleton for the water-cooled plate, improve the mechanical strength of the water-cooled plate, and perform secondary insulation on the water-cooled plate (the water-cooled plate itself is insulated, which is primary insulation).

[0083] The liquid cooling plate in the CCS component system cooperates with the liquid cooling plate on the bottom of the battery module to form a double-layer water cooling for the battery module, improving the heat dissipation capacity of the battery module; at the same time, it takes away part of the heat generated by the CCS component, reducing the temperature shock to the CCS component under high-rate charging and discharging;

[0084] Compared with the prior art in which the CCS components and the water cooling plates are stacked in the Z direction of the battery module, the CCS components and the busbars in the CCS component system of this patent are overlapped in the Z direction of the battery module, which greatly reduces the height of the battery module and the space occupied by the battery module in the Z direction. The structure is more compact and can reduce the heat transfer path, thereby improving the heat dissipation efficiency.

[0085] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0086] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention 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 application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. An integrated busbar assembly, characterized in that: include: An integrated busbar and a cooling plate; the integrated busbar comprises a busbar body and a structural support member; The busbar body and the cooling plate are arranged on a first surface of the structural support member in a first direction; One end of the busbar body in the first direction is used to connect to a battery; The cooling plate is disposed on at least one side of the busbar body in a second direction, and the first direction is perpendicular to the second direction.

2. The integrated busbar assembly according to claim 1, characterized in that: The thickness of the busbar body is smaller than the thickness of the cooling plate.

3. The integrated busbar assembly according to claim 1, characterized in that: An embedding groove is formed on the first surface of the structural support component, and the cooling plate is arranged in the embedding groove.

4. The integrated busbar assembly according to claim 1, characterized in that: The integrated busbar further comprises a flexible circuit board, which is electrically connected to the busbar body. The flexible circuit board is arranged on the first surface of the structural support component, and the cooling plate is at least partially attached to the flexible circuit board.

5. The integrated busbar assembly according to claim 4, characterized in that: An embedding groove is provided on the first surface of the structural support member, the flexible circuit board is arranged in the embedding groove and adheres to the bottom of the embedding groove, the cooling plate is at least partially adhered to the side of the flexible circuit board facing away from the bottom of the embedding groove, and the cooling plate is arranged in the embedding groove.

6. The integrated busbar assembly according to claim 1, characterized in that: The surface of the cooling plate is provided with an insulating coating.

7. The integrated busbar assembly according to claim 1, characterized in that: The cooling plate includes a first plate body, a second plate body and a plurality of connecting plates, the first plate body and the second plate body are arranged at an interval with each other, the first plate body and the second plate body are connected by the connecting plates, a first water-cooling cavity is arranged inside the first plate body, a second water-cooling cavity is arranged inside the second plate body, a connecting cavity is arranged inside the connecting plate, the first water-cooling cavity is communicated with the second water-cooling cavity through the connecting cavity, the first plate body is provided with a water inlet, the second plate body is provided with a water outlet, and the busbar body includes a plurality of conductive members, each of which is respectively arranged on a side of the first plate body away from the second plate body, a side of the second plate body away from the first plate body, and between the first plate body and the second plate body.

8. The integrated busbar assembly according to any one of claims 1 to 7, characterized in that: The material of the structural support member is plastic; the manufacturing process of the structural support member includes any one of the following: The structural support member is made by a vacuum forming process, and the busbar body is fixed on a first surface in a first direction of the structural support member by a hot riveting process; The structural support member is manufactured by a hot pressing process, and the busbar body and the cooling plate are fixed on the structural support member by a hot pressing process during the hot pressing process of the structural support member.

9. The integrated busbar assembly according to claim 8, characterized in that: The cooling plate is connected to the structural support member via a thermally conductive gel.

10. A battery module, comprising a plurality of batteries, characterized in that: It also comprises the integrated busbar assembly as described in any one of claims 1-9.

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