Battery heat exchange plate and battery pack

Abstract

The application discloses a battery heat exchange plate and a battery pack, and belongs to the technical field of battery heat exchange. The battery heat exchange plate comprises a flow distribution piece, a flow channel piece and a support piece. The flow distribution piece is provided with a flow distribution groove. The flow channel piece is provided with a flow channel groove. The support piece is arranged between the flow distribution piece and the flow channel piece. One side of the support piece covers and seals the flow distribution groove. The other side of the support piece covers and seals the flow channel groove. The support piece is provided with a connecting hole. The connecting hole is connected with the flow distribution groove and the flow channel groove. The battery heat exchange plate disclosed by the application is provided with the flow distribution piece. The flow distribution groove is arranged on the flow distribution piece. The flow distribution groove is covered and sealed by the support piece to form a flow distribution channel structure. The use of plastic pipes is reduced, and the structure of the battery heat exchange plate is simplified. The battery pack comprises a battery pack and the battery heat exchange plate as described above. The battery heat exchange plate is in heat conduction connection with the battery pack. By using the battery heat exchange plate, the use of plastic pipes in the battery pack is reduced, and the structure of the battery pack is simplified.

Description

Technical Field

[0001] This application relates to the field of battery heat exchange technology, and in particular to a battery heat exchange plate and battery pack. Background Technology

[0002] In the field of battery heat exchange technology, the inlet and outlet of the heat transfer fluid in the battery heat exchange plate require a large number of plastic pipes, resulting in a complex structure. Utility Model Content

[0003] This application provides a battery heat exchange plate and a battery pack to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, according to a first aspect of this application, a battery heat exchange plate is provided, including a flow divider, a flow channel, and a support. The flow divider has a flow divider groove, the flow channel has a flow channel groove, and the support is disposed between the flow divider and the flow channel. One side of the support covers the flow divider groove, and the other side covers the flow channel groove. The support has a connecting hole that connects the flow divider groove and the flow channel groove.

[0005] Optionally, the flow channel includes a first sub-flow channel and a second sub-flow channel spaced apart along a first direction, and a third sub-flow channel. The third sub-flow channel is connected to the end of the first sub-flow channel and the end of the second sub-flow channel, and communicates with the first sub-flow channel and the second sub-flow channel. The first sub-flow channel communicates with the flow divider.

[0006] Optionally, the flow channel further includes a fourth sub-flow channel and a fifth sub-flow channel spaced apart along a first direction, and a sixth sub-flow channel. The fourth sub-flow channel is connected to the first sub-flow channel, the fifth sub-flow channel is connected to the second sub-flow channel, and the sixth sub-flow channel is connected to the end of the fourth sub-flow channel and the end of the fifth sub-flow channel, and connects the fourth sub-flow channel and the fifth sub-flow channel.

[0007] Optionally, the flow channel component also includes a flow channel groove, which has multiple flow channel grooves. The multiple flow channel grooves are spaced apart along the first direction. The second sub-flow channel in each flow channel groove is connected to the flow channel groove. The support component has multiple connecting holes, which correspond to the first sub-flow channel in each flow channel groove.

[0008] Optionally, multiple connection holes are spaced apart along a first direction.

[0009] Optionally, the support also has a flow collection hole, the support covers the flow collection channel groove, and the flow collection hole connects to the flow collection channel groove.

[0010] Optionally, the flow channel component is provided with a first clearance notch along the second direction, the second direction intersects with the first direction, and the support component is provided with a second clearance notch at the corresponding position of the first clearance notch. The first clearance notch and the second clearance notch are used to avoid the exhaust valve of the battery cell.

[0011] Optionally, the first clearance gap is provided between the first sub-channel and the second sub-channel.

[0012] Alternatively, the flow channels and runners are formed by stamping.

[0013] According to a second aspect of this application, a battery pack is provided, including a battery assembly and a battery heat exchange plate as described above, wherein the battery heat exchange plate is thermally connected to the battery assembly.

[0014] The battery heat exchange plate of this application embodiment has a flow divider with a flow divider groove on it. The flow divider groove is covered by a support member to form a flow divider channel structure, which reduces the use of plastic pipes and simplifies the structure of the battery heat exchange plate.

[0015] The battery pack of this application embodiment uses the battery heat exchange plate of this application. The battery heat exchange plate has a flow distribution groove on the flow distribution member, and the flow distribution groove is covered by the support member to form a flow distribution channel structure, which reduces the use of plastic pipes in the battery pack and simplifies the structure of the battery pack.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0019] Figure 1 This is a schematic diagram of a battery heat exchange plate in one embodiment of this application; Figure 2 This is an exploded view of the battery heat exchange plate in one embodiment of this application; Figure 3 This is a schematic diagram of the flow channel in one embodiment of this application; Figure 4 This is a schematic diagram of a battery pack in one embodiment of this application; Figure 5 This is an exploded view of a battery pack in one embodiment of this application.

[0020] Explanation of reference numerals in the attached figures: 1. Diverter component; 11. Diverter channel; 2. Flow channel component; 21. Flow channel groove; 211. First sub-flow channel; 212. Second sub-flow channel; 213. Third sub-flow channel; 214. Fourth sub-flow channel; 215. Fifth sub-flow channel; 216. Sixth sub-flow channel; 22. Combining channel groove; 23. First clearance notch; 3. Support component; 31. Connecting hole; 32. Inlet hole; 33. Second clearance notch; 41. Aluminum bar; 42. Exhaust valve; 43. Secondary heat exchange plate; 44. Liquid inlet pipe; 45. Liquid outlet pipe; 46. Beam; 47. Insulating component; 48. Lower housing; X, the first direction; Y, the second direction. Detailed Implementation

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0022] In the field of battery heat exchange technology, the design of battery heat exchange plates typically requires the use of numerous plastic pipes for the inlet and outlet of the heat transfer fluid. This complicates the structure, occupies a significant portion of valuable battery space, and impacts overall compactness and efficiency. Furthermore, the use of plastic pipes carries certain risks; over long-term use, pipes may detach due to material aging or loose connections.

[0023] According to a first aspect of this application, this application provides a battery heat exchange plate, please refer to... Figure 1 , Figure 2 It includes a flow divider 1, a flow channel 2, and a support 3. The flow divider 1 has a flow divider groove 11, the flow channel 2 has a flow channel groove 21, and the support 3 is disposed between the flow divider 1 and the flow channel 2. One side of the support 3 covers the flow divider groove 11, and the other side covers the flow channel groove 21. The support 3 has a connecting hole 31, which connects the flow divider groove 11 and the flow channel groove 21.

[0024] The battery heat exchange plate in this application forms a flow channel structure by using a flow channel 11 on the flow divider 1 and sealing the flow channel 11 with a support 3. This reduces the use of plastic pipes, simplifies the overall structure of the battery heat exchange plate, and reduces the risk of plastic pipes detaching during use. Furthermore, the battery heat exchange plate also features a flow channel 21 on the flow channel component 2, which is also sealed by the support 3. This results in a three-layer structure consisting of the flow divider 1, the flow channel component 2, and the support 3. This three-layer structure can be firmly connected using techniques such as brazing, further simplifying the overall structure of the battery heat exchange plate, reducing production and assembly costs, and making it suitable for large-scale production applications.

[0025] Please see Figure 3 In the figure, the arrows indicate the flow direction of the heat transfer fluid. In some embodiments, the flow channel 21 includes a first sub-flow channel 211 and a second sub-flow channel 212 spaced apart along the first direction X, and a third sub-flow channel 213. The third sub-flow channel 213 connects to the ends of the first sub-flow channel 211 and the second sub-flow channel 212, and communicates with the first sub-flow channel 211 and the second sub-flow channel 212. The first sub-flow channel 211 communicates with the branch channel 11. The flow channel 21, composed of the first sub-flow channel 211, the second sub-flow channel 212, and the third sub-flow channel 213, has a relatively long length, allowing the heat transfer fluid to exchange heat sufficiently within the flow channel 21 and optimizing the heat exchange effect. The third sub-flow channel 213 can be optionally arranged along the first direction X, located at the end of the corresponding battery pack, making the flow channel 21 relatively long, thereby improving the heat exchange effect of the battery heat exchange plate.

[0026] Please see Figure 3 In some embodiments, the flow channel 21 further includes a fourth sub-flow channel 214 and a fifth sub-flow channel 215 spaced apart along a first direction X, and a sixth sub-flow channel 216. The fourth sub-flow channel 214 is connected to the first sub-flow channel 211, the fifth sub-flow channel 215 is connected to the second sub-flow channel 212, and the sixth sub-flow channel 216 is connected to the end of the fourth sub-flow channel 214 and the end of the fifth sub-flow channel 215, and connects the fourth sub-flow channel 214 and the fifth sub-flow channel 215. The flow channel formed by the fourth sub-flow channel 214, the fifth sub-flow channel 215 and the sixth sub-flow channel 216 is arranged in parallel with the flow channel formed by the first sub-flow channel 211, the second sub-flow channel 212 and the third sub-flow channel 213 to enhance the heat exchange effect at the corresponding positions and make the heat exchange more uniform. In specific applications, the first sub-flow channel 211 and the fourth sub-flow channel 214 can be set at the corresponding battery cell's pole or the corresponding aluminum bar 41 position, and the second sub-flow channel 212 and the fifth sub-flow channel 215 can be set at the other pole or the corresponding aluminum bar 41 position of the corresponding battery cell.

[0027] Please see Figure 2In some embodiments, the flow channel component 2 further includes a collecting channel groove 22. Multiple flow channel grooves 21 are provided, spaced apart along a first direction X. The support component 3 has multiple connecting holes 31, each corresponding to a first sub-flow channel 211 in each flow channel groove 21. The diverting channel 11 on the diverting component 1 simultaneously connects to each first sub-flow channel 211, connecting each flow channel 21 with the diverting channel 11, thereby connecting the liquid inlet end of each flow channel 21. By providing the collecting channel groove 22 on the flow channel component 2, the reliability and ease of operation of the battery heat exchange plate are improved. Optionally, the diverting channel 11 is configured to have a main channel and a diverting channel, connecting each first sub-flow channel 211 through the diverting channel. The second sub-flow channel 212 in each flow channel groove 21 connects to the collecting channel groove 22, connecting the liquid outlet end in each flow channel groove 21. In the technical solution of setting the fourth sub-flow channel 214 and the fifth sub-flow channel 215, the fourth sub-flow channel 214 is connected to the diverter 11, and the fifth sub-flow channel 215 is connected to the collector channel 22. In some other embodiments, the collector channel 22 can also be set on the diverter 1, and connected to the corresponding second sub-flow channel 212 and the collector channel 22 through similar connecting holes.

[0028] Please see Figure 2 In some embodiments, the current shunt 1 is provided with a plurality of connection holes 31 at intervals in the first direction X, which significantly shortens the length of the current shunt 1 in the second direction Y, making the structure of the current shunt 1 more compact, optimizing the space utilization of the current shunt 1, effectively reducing the volume occupied by the current shunt 1 in the battery pack, and contributing to the overall lightweighting and space optimization of the battery pack.

[0029] Please see Figure 3 In some embodiments, the support member 3 also has a flow collection hole 32, the support member 3 covers the flow collection channel groove 22, the flow collection hole 32 is connected to the flow collection channel groove 22, and the flow collection hole 32 is provided to facilitate the connection of the liquid outlet pipe 45.

[0030] Please see Figure 2 In some embodiments, the flow channel component 2 is provided with a first clearance notch 23 along the second direction Y, which intersects with the first direction X. Optionally, the second direction Y is perpendicular to the first direction X. The support component 3 is provided with a second clearance notch 33 at the corresponding position of the first clearance notch 23. The first clearance notch 23 and the second clearance notch 33 are used to avoid the exhaust valve 42 of the battery cell, and reserve an exhaust channel for thermal runaway of the battery cell to improve the safety and reliability of the battery pack under extreme conditions.

[0031] Please see Figure 4In some embodiments, the first clearance notch 23 is disposed between the first sub-channel 211 and the second sub-channel 212, so that the exhaust valves 42 of the rows of battery cells in the battery pack can exhaust in time during thermal runaway, and the first sub-channel 211 and the second sub-channel 212 are disposed at the corresponding battery cell poles or aluminum bars 41 positions, thereby improving the heat dissipation efficiency of the battery pack.

[0032] In some embodiments, the diversion groove 11 and the flow channel 21 are formed by stamping, which not only ensures the precise dimensions and shape of the diversion component 1 and the flow channel component 2, but also improves production efficiency. To make the connection between the diversion component 1, the flow channel component 2 and the support component 3 more stable, the diversion component 1, the flow channel component 2 and the support component 3 can be fixedly connected by brazing or other methods, which can effectively reduce production costs.

[0033] According to a second aspect of this application, this application provides a battery pack, please refer to... Figure 4 , Figure 5 The battery pack includes a battery assembly and a battery heat exchange plate as described in the above embodiments, with the battery heat exchange plate thermally connected to the battery assembly. The battery pack uses the battery heat exchange plate of this application, which has a shunt groove on its shunt component. The shunt groove is sealed by a support component, forming a shunt channel structure, reducing the use of plastic pipes in the battery pack and simplifying its structure.

[0034] Please see Figure 4 , Figure 5 In some embodiments, the battery heat exchange plate is disposed on the side of the battery pack where the terminals are located or on the side where the vent valve 42 is located. In the technical solution where the battery heat exchange plate is disposed on the side of the terminals, considering the large heat generation at the terminals, the first sub-channel 211 and the second sub-channel 212 are disposed at the corresponding positions of the battery pack terminals or aluminum bars 41 to facilitate rapid heat dissipation. In the technical solution where the battery heat exchange plate is disposed on the side of the vent valve 42, considering the need to provide an exhaust channel in case of battery thermal runaway, the first clearance notch 23 and the second clearance notch 33 are disposed at the corresponding positions of the vent valve 42 to keep the exhaust channel unobstructed in case of battery thermal runaway.

[0035] Please see Figure 4 , Figure 5 In some embodiments, an auxiliary heat exchange plate 43 is also included, which is disposed on the side of the battery pack away from the battery heat exchange plate. By providing heat exchange plates on both sides of the battery pack, the overall heat dissipation effect of the battery pack is enhanced.

[0036] Please see Figure 4 , Figure 5In some embodiments, the system also includes an inlet pipe 44 and an outlet pipe 45. The inlet pipe 44 connects the inlet end of the battery heat exchange plate and the inlet end of the auxiliary heat exchange plate 43, and the outlet pipe 45 connects the outlet end of the battery heat exchange plate and the outlet end of the auxiliary heat exchange plate 43, so that the heat exchange plates on both sides share a set of inlet pipe 44 and outlet pipe 45, simplifying the structure.

[0037] In some embodiments, thermally conductive silicone is provided between the battery heat exchange plate and the battery pack to facilitate the absorption of assembly errors of the battery pack.

[0038] Please see Figure 3 In some embodiments, the number of parallel branches of the battery heat exchange plate can be flexibly selected according to the arrangement of the battery pack. Taking a battery pack with 6 rows of batteries as an example, 6 parallel flow channel slots 21 are used. Selecting an appropriate number of flow channel slots 21 can meet the heat exchange requirements and reduce the system pressure drop. The flow divider 1 is designed to split the main water inlet into 2 flow channels and then connect them to 3 flow channel slots 21 respectively. This makes the flow distribution of each flow channel slot 21 uniform, and the flow deviation can meet the standard of <10% compared with the theoretical design, and improves the temperature uniformity performance of the battery heat exchange plate.

[0039] Please see Figure 5 In some embodiments, the battery pack assembly process can be simplified. The battery pack housing includes an upper housing and a lower housing 48. The assembly steps are as follows: First, the beam 46 and the auxiliary heat exchange plate 43 are assembled into the lower housing 48. Thermally conductive adhesive is applied to the surface of the auxiliary heat exchange plate 43, and the battery pack is then assembled. Next, the aluminum bar 41 is integrated with the insulating component 47 and welded to the cell terminals in the battery pack. Then, the battery heat exchange plate and the aluminum bar 41 are connected by thermally conductive silicone, which serves to provide insulation and absorb the assembly tolerance of the aluminum bar 41, reducing the thermal resistance between the aluminum bar 41 and the cold plate. Finally, the battery heat exchange plate and the auxiliary heat exchange plate 43 are connected to two T-junctions via four short plastic water pipes. This technical solution adds a top-mounted aluminum bar 41 cooling method to the traditional bottom heat exchange plate, improving the heat dissipation efficiency by more than 20% compared to a single bottom cooling solution.

[0040] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0041] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0042] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0043] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery heat exchange plate, characterized in that, include: The flow divider (1) has a flow divider groove (11); The flow channel component (2) has a flow channel groove (21); A support member (3) is disposed between the flow divider (1) and the flow channel member (2). One side of the support member (3) covers the flow divider groove (11), and the other side covers the flow channel groove (21). The support member (3) has a connecting hole (31), which connects the flow divider groove (11) and the flow channel groove (21).

2. The battery heat exchange plate according to claim 1, characterized in that, The flow channel (21) includes a first sub-flow channel (211) and a second sub-flow channel (212) spaced apart along a first direction (X), and a third sub-flow channel (213); the third sub-flow channel (213) is connected to the end of the first sub-flow channel (211) and the end of the second sub-flow channel (212), and communicates with the first sub-flow channel (211) and the second sub-flow channel (212); The first sub-channel (211) is connected to the diversion channel (11).

3. The battery heat exchange plate according to claim 2, characterized in that, The flow channel (21) further includes a fourth sub-flow channel (214) and a fifth sub-flow channel (215) spaced apart along a first direction (X), and a sixth sub-flow channel (216); the fourth sub-flow channel (214) is connected to the first sub-flow channel (211), the fifth sub-flow channel (215) is connected to the second sub-flow channel (212), and the sixth sub-flow channel (216) is connected to the end of the fourth sub-flow channel (214) and the end of the fifth sub-flow channel (215), and connects the fourth sub-flow channel (214) and the fifth sub-flow channel (215).

4. The battery heat exchange plate according to claim 2, characterized in that, The flow channel component (2) also includes a flow collection channel groove (22); The flow channel groove (21) is provided in multiple ways, and the multiple flow channel grooves (21) are spaced apart along the first direction (X); the second sub-flow channel (212) in each flow channel groove (21) is connected to the collection channel groove (22); the support member (3) is provided with multiple connecting holes (31), which correspond to the first sub-flow channel (211) in each flow channel groove (21).

5. The battery heat exchange plate according to claim 4, characterized in that, The plurality of connection holes (31) are spaced apart along a first direction (X).

6. The battery heat exchange plate according to claim 4, characterized in that, The support member (3) also has a flow collection hole (32), which covers the flow collection channel groove (22) and the flow collection hole (32) is connected to the flow collection channel groove (22).

7. The battery heat exchange plate according to claim 2, characterized in that, The flow channel component (2) is provided with a first clearance notch (23) along the second direction (Y); the second direction (Y) intersects with the first direction (X); The support member (3) has a second clearance notch (33) at the corresponding position of the first clearance notch (23); The first clearance notch (23) and the second clearance notch (33) are used to avoid the exhaust valve (42) of the battery cell.

8. The battery heat exchange plate according to claim 7, characterized in that, The first clearance gap (23) is disposed between the first sub-channel (211) and the second sub-channel (212).

9. The battery heat exchange plate according to claim 1, characterized in that, The flow channel (11) and the flow channel (21) are formed by stamping.

10. A battery pack, characterized in that, It includes a battery pack and a battery heat exchange plate as described in any one of claims 1 to 9; the battery heat exchange plate is thermally connected to the battery pack.

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