Water cooling plate assembly for battery pack and vehicle

Abstract

The utility model discloses a water cooling plate assembly for a battery pack and a vehicle. The water cooling plate assembly comprises a water cooling plate, the water cooling plate is provided with a water inlet and a water outlet, a plurality of heat exchange areas are formed in the water cooling plate, and a cooling flow channel is formed in each heat exchange area. The heat exchange areas comprise the first heat exchange area, the second heat exchange area, the third heat exchange area and the fourth heat exchange area, the first heat exchange area is arranged close to the water inlet, and the flow of a cooling flow channel in the first heat exchange area is Q1; the second heat exchange area is arranged on the side, away from the water inlet, of the first heat exchange area, and the flow of a cooling flow channel in the second heat exchange area is Q2; the third heat exchange area is arranged close to the water outlet, and the flow of the cooling flow channel in the third heat exchange area is Q3; the fourth heat exchange area is arranged on the side, away from the water outlet, of the third heat exchange area, and the flow of a cooling flow channel in the fourth heat exchange area is Q4; wherein Q1 is less than Q2; q3 is less than Q4. According to the water-cooling plate assembly, flow setting is carried out on each heat exchange area, so that the heat exchange capacity of the water-cooling plate is more balanced.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a water cooling plate assembly for a battery pack and a vehicle. Background Art

[0002] At present, battery packs are usually used in conjunction with structures such as water cooling plates when in use. The water cooling plate can exchange heat with the battery pack so that the battery pack is at the optimal temperature when working, thereby improving the performance of the battery pack. In the prior art, a plurality of heat exchange zones corresponding to the plurality of battery cells in the battery pack are provided in the water cooling plate, and each heat exchange zone is provided with cooling channels, and the plurality of cooling channels are independent of each other, so that heat exchange between the water cooling plate and the battery pack can be achieved to ensure the normal operation of the battery pack. However, the above arrangement cannot balance the heat exchange in each heat exchange zone of the water cooling plate, which reduces the overall heat exchange efficiency of the water cooling plate. In addition, excessive or weak local heat exchange capacity of the water cooling plate may cause safety accidents such as thermal runaway in the battery pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose a water-cooled plate assembly for a battery pack. The water-cooled plate assembly according to the utility model is capable of handling a variety of different battery packs by dividing a water-cooled plate into a plurality of independent heat exchange zones, each of which is connected in parallel with each other and does not affect each other. At the same time, the coolant flow rate of each heat exchange zone is set according to the positional relationship between the heat exchange zone and the water inlet, so that the heat exchange capacity on the water-cooled plate is more balanced, thereby improving the heat exchange effect of the water-cooled plate and avoiding excessive or weak local heat exchange capacity of the water-cooled plate.

[0004] The utility model also provides a vehicle comprising the water cooling plate assembly.

[0005] According to the utility model, the water-cooled plate assembly includes a water-cooled plate, the water-cooled plate is provided with a water inlet and a water outlet, and a water inlet flow path and a water outlet flow path respectively connected to the water inlet and the water outlet, the water-cooled plate forms a plurality of heat exchange zones, each of the heat exchange zones is formed with a cooling channel; the heat exchange zones include a first heat exchange zone, a second heat exchange zone, a third heat exchange zone and a fourth heat exchange zone, the first heat exchange zone is arranged adjacent to the water inlet, and the flow rate of the cooling channel in the first heat exchange zone is Q1; the second heat exchange zone is arranged on the side of the first heat exchange zone away from the water inlet, and the flow rate of the cooling channel in the second heat exchange zone is Q2; the third heat exchange zone is arranged adjacent to the water outlet, and the flow rate of the cooling channel in the third heat exchange zone is Q3; the fourth heat exchange zone is arranged on the side of the third heat exchange zone away from the water outlet, and the flow rate of the cooling channel in the fourth heat exchange zone is Q4; wherein, Q1<Q2; Q3<Q4.

[0006] According to the utility model, the water-cooled plate is provided with a water inlet, a water outlet and a plurality of heat exchange zones. The water inlet is connected with the plurality of heat exchange zones through the water inlet flow path, and the water outlet is connected with the plurality of heat exchange zones through the water outlet flow path. When the battery pack is working, the coolant can enter the water-cooled plate from the water inlet and enter the corresponding heat exchange zone along the water inlet flow path to exchange heat with the battery pack. The coolant after heat exchange can flow to the water outlet through the water outlet flow path and finally flow out of the water-cooled plate, thus realizing the heat exchange function of the water-cooled plate. Specifically, the heat exchange zone on the water-cooled plate includes a first heat exchange zone, a second heat exchange zone, a third heat exchange zone and a fourth heat exchange zone, wherein the first heat exchange zone is arranged adjacent to the water inlet, and the second heat exchange zone is arranged on the side of the first heat exchange zone away from the water inlet; the third heat exchange zone is arranged adjacent to the water outlet, and the fourth heat exchange zone is arranged on the side of the third heat exchange zone away from the water outlet. The water-cooled plate is equipped with four heat exchange zones that can exchange heat with multiple cells of the battery pack at the same time, which improves the heat exchange efficiency of the water-cooled plate. At the same time, the location setting scheme of the four heat exchange zones makes the overall structure of the water-cooled plate more compact. In addition, the setting scheme of Q1<Q2; Q3<Q4 can improve the balance of the heat exchange efficiency of each heat exchange zone of the water-cooled plate, avoid the situation where the local heat exchange capacity of the water-cooled plate is too strong or too weak, and thus improve the overall heat exchange efficiency of the water-cooled plate and the safety of the water-cooled plate during heat exchange.

[0007] According to one embodiment of the utility model, the first heat exchange zone includes a first sub-zone and a second sub-zone connected in parallel and arranged at intervals in a first direction, the flow rate of the cooling channel in the first sub-zone is Q11, the flow rate of the cooling channel in the second sub-zone is Q12, and 0≤|Q11-Q12|≤1.5 is satisfied.

[0008] According to an embodiment of the present invention, the first sub-area and the second sub-area are respectively connected to the water inlet on the side away from each other, and the first sub-area and the second sub-area are respectively connected to the water outlet on the side close to each other.

[0009] According to one embodiment of the utility model, the second heat exchange zone includes a third sub-zone and a fourth sub-zone which are connected in parallel with each other and arranged at intervals in the first direction; the fourth heat exchange zone includes a fifth sub-zone and a sixth sub-zone which are connected in parallel with each other and arranged at intervals in the first direction; the third sub-zone and the sixth sub-zone are adjacent to each other; wherein the flow rate of the cooling channel in the third sub-zone is Q21, the flow rate of the cooling channel in the fourth sub-zone is Q22, Q21<Q22; the flow rate of the cooling channel in the fifth sub-zone is Q41, the flow rate of the cooling channel in the sixth sub-zone is Q42, Q41>Q42.

[0010] According to one embodiment of the utility model, a plurality of branch flow paths parallel to each other are respectively formed in the first heat exchange zone, the second heat exchange zone, the third heat exchange zone and the fourth heat exchange zone, the coolant in at least one branch flow path flows along a first flow direction, and the coolant in at least another branch flow path flows along a second flow direction, and the first flow direction is opposite to the second flow direction.

[0011] According to an embodiment of the present invention, the number of the branch flow paths along the first flow direction is i1, and the number of the branch flow paths along the second flow direction is i2, satisfying: 0.3≤i1 / i2≤1.

[0012] According to one embodiment of the utility model, the multiple branch flow paths include: a first branch flow path, a second branch flow path and a third branch flow path, the first branch flow path and the second branch flow path are respectively arranged on both sides of the heat exchange zone in the first direction; the third branch flow path structure is multiple and connected to each other, and the multiple third branch flow paths are arranged between the first branch flow path and the second branch flow path, the first branch flow path and the second branch flow path are connected through the multiple third branch flow paths; wherein, in at least one heat exchange zone, the first branch flow path is connected to the water inlet flow path, the second branch flow path is connected to the water outlet flow path and / or the first branch flow path and the second branch flow path of at least one heat exchange zone are respectively connected to the water inlet flow path, and at least one third branch flow path is connected to the water outlet flow path.

[0013] According to one embodiment of the utility model, the water inlet flow path includes a first water inlet flow path, a second water inlet flow path and a third water inlet flow path, one end of the first water inlet flow path is connected to the water inlet, at least a portion of the first water inlet flow path is arranged on the periphery of the first heat exchange zone, and the other end of the first water inlet flow path is connected to the first branch flow path and the second branch flow path of the second heat exchange zone; one end of the second water inlet flow path is connected to the water inlet, and the other end of the second water inlet flow path is connected to the first branch flow path and the second branch flow path of the first heat exchange zone; one end of the third water inlet flow path is connected to the water inlet, and the other end of the third water inlet flow path is connected to the first branch flow path of the third heat exchange zone, and / or the other end of the third water inlet flow path is connected to the first branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths.

[0014] According to an embodiment of the utility model, the water outlet flow path includes a first water outlet flow path, a second water outlet flow path and a third water outlet flow path, one end of the first water outlet flow path is connected to at least one of the third branch flow paths of the second heat exchange zone, and the other end of the first water outlet flow path flows through the periphery of the fourth heat exchange zone and the third heat exchange zone in sequence and is connected to the water outlet connecting pipe; one end of the second water outlet flow path is connected to at least one of the third branch flow paths of the first heat exchange zone, and the other end of the second water outlet flow path flows through the periphery of the second heat exchange zone and the fourth heat exchange zone in sequence and is connected to the first water outlet flow path; one end of the third water outlet flow path is connected to the first branch flow path of the third heat exchange zone, and the other end of the third water outlet flow path flows through the periphery of the third heat exchange zone and is connected to the water outlet; a fourth water outlet flow path, one end of the fourth water outlet flow path is connected to the second branch flow path and at least one of the third branch flow paths of the fourth heat exchange zone, and the other end of the fourth water outlet flow path flows through the periphery of the fourth heat exchange zone and the periphery of the third heat exchange zone in sequence and is connected to the water outlet.

[0015] According to one embodiment of the present invention, the flow resistance of the branch flow path in the first heat exchange zone is R1, the flow resistance of the branch flow path in the second heat exchange zone is R2, the flow resistance of the branch flow path in the third heat exchange zone is R3, and the flow resistance of the branch flow path in the fourth heat exchange zone is R4, satisfying: R1>R2, R3>R4.

[0016] According to one embodiment of the utility model, the cross-sectional area of ​​the branch flow path in the first heat exchange zone is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone is S4, satisfying: S4>S3, S2>S1.

[0017] The vehicle according to the present utility model is briefly described below.

[0018] The vehicle according to the utility model includes the water cooling plate assembly in the above-mentioned embodiment. Since the vehicle according to the utility model includes the water cooling plate assembly in the above-mentioned embodiment, during the operation of the vehicle, the battery pack in the vehicle can be heat exchanged through the water cooling plate assembly. The four heat exchange zones on the water cooling plate can correspond to the battery cells in different positions of the battery pack. The flow design of the heat exchange zone makes the overall heat exchange efficiency of the water cooling plate more balanced, thereby improving the heat exchange capacity of the water cooling plate for the battery pack, ensuring that the battery pack of the vehicle can be at a suitable temperature during operation, and improving the safety of the vehicle.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 is a structural diagram of a water-cooling plate assembly according to an embodiment of the utility model;

[0022] Figure 2 is a structural diagram of a first heat exchange zone according to an embodiment of the utility model;

[0023] Figure 3 is a structural diagram of the second heat exchange zone according to an embodiment of the utility model;

[0024] Figure 4 is a structural diagram of the third heat exchange zone according to an embodiment of the utility model;

[0025] Figure 5 It is a structural diagram of the fourth heat exchange zone according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] Water cooling plate 1;

[0028] A first heat exchange zone 11, a first sub-zone 111, and a second sub-zone 112;

[0029] The second heat exchange zone 12, the third sub-zone 121, and the fourth sub-zone 122;

[0030] The third heat exchange zone 13;

[0031] The fourth heat exchange zone 14, the fifth sub-zone 141, and the sixth sub-zone 142;

[0032] Water inlet 151, water outlet 152;

[0033] A first branch flow path 161, a second branch flow path 162, and a third branch flow path 163;

[0034] A first water inlet flow path 171, a second water inlet flow path 172, and a third water inlet flow path 173;

[0035] A first water outlet flow path 181 , a second water outlet flow path 182 , a third water outlet flow path 183 , and a fourth water outlet flow path 184 . DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] At present, battery packs are usually used in conjunction with structures such as water cooling plates when in use. The water cooling plate can exchange heat with the battery pack so that the battery pack is at the optimal temperature when working, thereby improving the performance of the battery pack. In the prior art, a plurality of heat exchange zones corresponding to the plurality of battery cells in the battery pack are provided in the water cooling plate, and each heat exchange zone is provided with cooling channels, and the plurality of cooling channels are independent of each other, so that heat exchange between the water cooling plate and the battery pack can be achieved to ensure the normal operation of the battery pack. However, the above arrangement cannot balance the heat exchange in each heat exchange zone of the water cooling plate, which reduces the overall heat exchange efficiency of the water cooling plate. In addition, excessive or weak local heat exchange capacity of the water cooling plate may cause safety accidents such as thermal runaway in the battery pack.

[0038] Reference below Figure 1-Figure 5 A water cooling plate assembly according to an embodiment of the present invention is described.

[0039] The water-cooling plate assembly according to the utility model includes a water-cooling plate 1, which is provided with a water inlet 151 and a water outlet 152, and a water inlet flow path and a water outlet flow path respectively connected with the water inlet 151 and the water outlet 152, and the water-cooling plate 1 forms a plurality of heat exchange zones, each of which has a cooling channel; the heat exchange zone includes a first heat exchange zone 11, a second heat exchange zone 12, a third heat exchange zone 13 and a fourth heat exchange zone 14, the first heat exchange zone 11 is arranged adjacent to the water inlet 151, and the first heat exchange zone 11 The flow rate of the inner cooling channel is Q1; the second heat exchange zone 12 is arranged on the side of the first heat exchange zone 11 away from the water inlet 151, and the flow rate of the cooling channel in the second heat exchange zone 12 is Q2; the third heat exchange zone 13 is arranged adjacent to the water outlet 152, and the flow rate of the cooling channel in the third heat exchange zone 13 is Q3; the fourth heat exchange zone 14 is arranged on the side of the third heat exchange zone 13 away from the water outlet 152, and the flow rate of the cooling channel in the fourth heat exchange zone 14 is Q4; wherein, Q1<Q2; Q3<Q4.

[0040] According to the utility model, the water-cooling plate 1 is provided with a water inlet 151, a water outlet 152 and a plurality of heat exchange zones. The water inlet 151 is connected with the plurality of heat exchange zones through a water inlet flow path, and the water outlet 152 is connected with the plurality of heat exchange zones through a water outlet flow path. When the battery pack is working, the coolant can enter the water-cooling plate 1 from the water inlet 151 and enter the corresponding heat exchange zone along the water inlet flow path to exchange heat with the battery pack. The coolant after heat exchange can flow to the water outlet 152 through the water outlet flow path and finally flow out of the water-cooling plate 1, thereby realizing the heat exchange function of the water-cooling plate 1. Specifically, the heat exchange area on the water-cooled plate 1 includes a first heat exchange area 11, a second heat exchange area 12, a third heat exchange area 13 and a fourth heat exchange area 14, wherein the first heat exchange area 11 is arranged adjacent to the water inlet 151, and the second heat exchange area 12 is arranged on the side of the first heat exchange area 11 away from the water inlet 151; the third heat exchange area 13 is arranged adjacent to the water outlet 152, and the fourth heat exchange area 14 is arranged on the side of the third heat exchange area 13 away from the water outlet 152. The four heat exchange areas arranged on the water-cooled plate 1 can simultaneously exchange heat with multiple cells of the battery pack, thereby improving the heat exchange efficiency of the water-cooled plate 1. At the same time, the position setting scheme of the four heat exchange areas makes the overall structure of the water-cooled plate 1 more compact.

[0041] In addition, the flow rate of the cooling channel in the first heat exchange zone 11 is Q1, the flow rate of the cooling channel in the second heat exchange zone 12 is Q2, the flow rate of the cooling channel in the third heat exchange zone 13 is Q3, and the flow rate of the cooling channel in the fourth heat exchange zone 14 is Q4, wherein Q1<Q2; Q3<Q4, i.e., the flow rate of the cooling channel in the first heat exchange zone 11 is less than the flow rate of the cooling channel in the second heat exchange zone 12, and the flow rate of the cooling channel in the third heat exchange zone 13 is less than the flow rate of the cooling channel in the fourth heat exchange zone 14. The flow rate setting of the cooling channel in the four heat exchange zones of the water-cooled plate 1 facilitates making the heat exchange efficiency of each heat exchange zone more uniform. Specifically, after the coolant flows into the water-cooled plate 1, due to the layout of the heat exchange zone positions, the distance that the coolant enters the first heat exchange zone 11 will be shorter than the distance that the coolant enters the second heat exchange zone 12. Therefore, the setting that the flow rate of the cooling channel in the second heat exchange zone 12 is greater than the flow rate of the cooling channel in the first heat exchange zone 11 can avoid the loss of the coolant in the process of flowing into the second heat exchange zone 12 and increase the speed of the coolant flowing into the second heat exchange zone 12, so that the heat exchange efficiency of the first heat exchange zone 11 and the second heat exchange zone 12 during heat exchange is more balanced. Similarly, the distance that the coolant enters the third heat exchange zone 13 will be shorter than the distance that the coolant enters the fourth heat exchange zone 14. Therefore, the setting that the flow rate of the cooling channel in the fourth heat exchange zone 14 is greater than the flow rate of the cooling channel in the third heat exchange zone 13 can avoid the loss of the coolant in the process of flowing into the fourth heat exchange zone 14 and increase the speed of the coolant flowing into the fourth heat exchange zone 14, so that the heat exchange efficiency of the third heat exchange zone 13 and the fourth heat exchange zone 14 during heat exchange is more balanced. The setting scheme of Q1<Q2; Q3<Q4 can improve the balance of heat exchange efficiency of each heat exchange zone of the water-cooled plate 1, avoid the situation where the local heat exchange capacity of the water-cooled plate 1 is too strong or too weak, thereby improving the overall heat exchange efficiency of the water-cooled plate 1 and the safety of the water-cooled plate 1 during heat exchange.

[0042] It is worth noting that the above-mentioned coolant loss can be understood as at least a portion of the coolant adhering to the pipeline for conveying the coolant when the coolant flows to the second heat exchange area 12 or the fourth heat exchange area 14 .

[0043] In some embodiments, Q1 and Q3 may be the same or relatively close, and may be specifically limited according to the actual processing size of the water-cooling plate 1 .

[0044] According to one embodiment of the utility model, the first heat exchange zone 11 includes a first sub-zone 111 and a second sub-zone 112 which are connected in parallel and arranged at intervals in the first direction. The flow rate of the cooling channel in the first sub-zone 111 is Q11, and the flow rate of the cooling channel in the second sub-zone 112 is Q12, and 0≤|Q11-Q12|≤1.5 is satisfied. Specifically, the first sub-zone 111 and the second sub-zone 112 are provided in the first heat exchange zone 11, and the first sub-zone 111 and the second sub-zone 112 can exchange heat for different battery cells in the battery pack, thereby improving the heat exchange capacity of the water cooling plate 1. The first sub-zone 111 and the second sub-zone 112 are arranged at intervals in the first direction, which can make the structure of the first heat exchange zone 11 itself more compact. In addition, the flow rate of the cooling channel in the first sub-zone 111 is Q11, and the flow rate of the cooling channel in the second sub-zone 112 is Q12, and they satisfy 0≤|Q11-Q12|≤1.5%, that is, the difference between the flow rate of the cooling channel in the first sub-zone 111 and the flow rate of the cooling channel in the second sub-zone 112 is controlled at 0-1.5%. The relationship between Q11 and Q12 can make the heat exchange capacity of the first sub-zone 111 and the heat exchange capacity of the second sub-zone 112 more balanced, avoiding the situation where the local heat exchange capacity is too strong during heat exchange in the first heat exchange zone 11.

[0045] According to an embodiment of the present invention, the first sub-area 111 and the second sub-area 112 are respectively connected to the water inlet 151 on the side away from each other, and the first sub-area 111 and the second sub-area 112 are respectively connected to the water outlet 152 on the side close to each other. Specifically, the connecting pipe between the first sub-area 111 and the water inlet 151 and the connecting pipe between the second sub-area 112 and the water inlet 151 are respectively arranged on the side of the first sub-area 111 and the second sub-area 112 away from each other; the connecting pipe between the first sub-area 111 and the water outlet 152 and the connecting pipe between the second sub-area 112 and the water outlet 152 are respectively arranged on the side of the first sub-area 111 and the second sub-area 112 close to each other. The connection scheme between the first sub-area 111 and the second sub-area 112 and the water inlet 151 and the water outlet 152 makes the coolant present a "two-side entry and middle exit" situation between the coolant and the first heat exchange area 11. Here, two-side entry and middle exit can be understood as the coolant entering the first sub-area 111 and the second sub-area 112 from the two side surfaces of the first sub-area 111 and the second sub-area 112 away from each other, respectively, and at the same time, the coolant flows out from the side of the first sub-area 111 and the second sub-area 112 close to each other. The setting of the coolant inlet and outlet routes of the first sub-area 111 and the second sub-area 112 makes the coolant of the first heat exchange area 11 flow from the periphery to the middle. When the battery pack is working, the temperature of the edge of the battery pack changes rapidly. Therefore, the coolant flowing from the periphery to the middle of the first heat exchange area 11 can improve the heat exchange capacity between the first heat exchange area 11 and the corresponding battery cell, so that the battery cell can be at a suitable temperature, and the cold start capability of the battery cell is improved.

[0046] According to one embodiment of the utility model, the second heat exchange zone 12 includes a third sub-zone 121 and a fourth sub-zone 122 which are connected in parallel to each other and spaced apart in the first direction; the fourth heat exchange zone 14 includes a fifth sub-zone 141 and a sixth sub-zone 142 which are connected in parallel to each other and spaced apart in the first direction; the third sub-zone 121 and the sixth sub-zone 142 are adjacent to each other; wherein, the flow rate of the cooling channel in the third sub-zone 121 is Q21, the flow rate of the cooling channel in the fourth sub-zone 122 is Q22, Q21<Q22; the flow rate of the cooling channel in the fifth sub-zone 141 is Q41, the flow rate of the cooling channel in the sixth sub-zone 142 is Q42, Q41>Q42.

[0047] Similar to the above-mentioned first heat exchange zone 11, the second heat exchange zone 12 and the fourth heat exchange zone 14 can also construct multiple sub-zones. Specifically, the second heat exchange zone 12 can be provided with a third sub-zone 121 and a fourth sub-zone 122, and the fourth heat exchange zone 14 can be provided with a fifth sub-zone 141 and a sixth sub-zone 142, wherein the third sub-zone 121 and the fourth sub-zone 122 are spaced apart in the first direction, the fifth sub-zone 141 and the sixth sub-zone 142 are also spaced apart in the first direction, and the third sub-zone 121 and the sixth sub-zone 142 are adjacent to each other. It can be understood that the fifth sub-zone 141, the sixth sub-zone 142, the third sub-zone 121 and the fourth sub-zone 122 are sequentially spaced apart in the first direction of the water-cooled plate 1. The second heat exchange zone 12 and the fourth heat exchange zone 14 are respectively constructed with two sub-zones so that the second heat exchange zone 12 and the fourth heat exchange zone 14 can simultaneously exchange heat with multiple battery cells in the battery pack, thereby improving the heat exchange capacity of the water-cooled plate 1. At the same time, the layout of the fifth sub-zone 141, the sixth sub-zone 142, the third sub-zone 121 and the fourth sub-zone 122 on the water-cooled plate 1 improves the compactness of the structure of the second heat exchange zone 12 and the fourth heat exchange zone 14.

[0048] In addition, in the second heat exchange area 12, the flow rate of the cooling channel in the third sub-area 121 is Q21, and the flow rate of the cooling channel in the fourth sub-area 122 is Q22, and Q21<Q22 is satisfied, that is, the coolant flow rate in the third sub-area 121 is less than the coolant flow rate in the fourth sub-area 122. Since the fourth sub-area 122 is arranged in the second heat exchange area 12 closer to the edge of the water-cooled plate 1, which corresponds to the edge of the battery pack, the temperature of the battery cell changes rapidly. Therefore, the coolant flow rate of the fourth sub-area 122 is larger than that of the third sub-area 121, which can improve the heat exchange capacity of the fourth sub-area 122 to the battery cell, ensure that the battery cell corresponding to the fourth sub-area 122 can exchange heat in time, and improve the safety of the battery cell. Similarly, in the fourth heat exchange zone 14, the flow rate of the cooling channel in the fifth sub-zone 141 is Q41, and the flow rate of the cooling channel in the sixth sub-zone 142 is Q42, Q41>Q42. Since the fifth sub-zone 141 is arranged in the fourth heat exchange zone 14 closer to the edge of the water-cooled plate 1, which corresponds to the edge of the battery pack, the temperature of the battery cell changes rapidly. Therefore, the coolant flow rate of the fifth sub-zone 141 is larger than that of the sixth sub-zone 142, which can improve the heat exchange capacity of the fifth sub-zone 141 for the battery cell, ensure that the battery cell corresponding to the fifth sub-zone 141 can exchange heat in time, and improve the safety of the battery cell.

[0049] In some embodiments, the third heat exchange area 13 may also be constructed with multiple sub-areas, and the specific configuration scheme may be set according to the requirements of the battery pack during actual assembly.

[0050] According to one embodiment of the utility model, a plurality of branch flow paths parallel to each other are formed in the first heat exchange zone 11, the second heat exchange zone 12, the third heat exchange zone 13 and the fourth heat exchange zone 14, respectively. The coolant in at least one branch flow path flows along the first flow direction, and the coolant in at least another branch flow path flows along the second flow direction, and the first flow direction is opposite to the second flow direction. The heat exchange of the soaker water-cooled plate 1 is achieved by the flow of coolant in each heat exchange zone. Therefore, the structure of the heat exchange zone will affect the heat exchange capacity of the water-cooled plate 1. Specifically, a plurality of branch flow paths parallel to each other are formed in the first heat exchange zone 11, the second heat exchange zone 12, the third heat exchange zone 13 and the fourth heat exchange zone 14, respectively. It can be understood that the coolant will flow in multiple branch flow paths after entering each heat exchange zone. The structure of multiple branch flow paths increases the heat exchange area between each heat exchange zone and the battery pack, thereby improving the heat exchange capacity of the water-cooled plate 1. In any heat exchange zone, the coolant in at least one branch flow path flows along a first flow direction, and the coolant in at least another branch flow path flows along a second flow direction, and the first flow direction is opposite to the second flow direction. It can be understood that there are branch flow paths with opposite coolant flow directions among the multiple parallel branch flow paths, and the flow direction setting scheme of the coolant in the branch flow paths can make the coolant in a single heat exchange zone flow back and forth between the first flow direction and the second flow direction, thereby increasing the residence time of the coolant in each heat exchange zone, thereby improving the heat exchange capacity of each heat exchange zone.

[0051] According to an embodiment of the present invention, the number of the branch flow paths along the first flow direction is i1, and the number of the branch flow paths along the second flow direction is i2, satisfying: 0.3≤i1 / i2≤1. In any heat exchange zone, at least some of the adjacent branch flow paths have the same flow direction, and at least some of the adjacent branch flow paths have opposite flow directions, such as Figure 4 As shown, in the third heat exchange zone 13, 8 branch flow paths are arranged in sequence in the first direction, among which the branch flow paths at both ends of the first direction are in the first direction, and the number of the coolant in the remaining 6 branch flow paths in the first direction and the second direction is 2 and 4 respectively, that is, the ratio of the number of branch flow paths in the first direction to the number of branch flow paths in the second direction in the first heat exchange zone 11 is 1. The same is true for other heat exchange zones, and it is only necessary to satisfy: 0.3≤i1 / i2≤1. Through the above arrangement, multiple branch flow paths can be connected in series and / or in parallel with each other, which prolongs the time that the coolant stays in the heat exchange zone and improves the heat exchange effect of the coolant on the battery pack.

[0052] According to one embodiment of the utility model, the plurality of branch flow paths include: a first branch flow path 161, a second branch flow path 162 and a third branch flow path 163, the first branch flow path 161 and the second branch flow path 162 are respectively arranged on both sides of the heat exchange zone in the first direction; the third branch flow path 163 is constructed to be multiple and connected to each other, and the multiple third branch flow paths 163 are arranged between the first branch flow path 161 and the second branch flow path 162, and the first branch flow path 161 and the second branch flow path 162 are connected through the multiple third branch flow paths 163; wherein, in at least one heat exchange zone, the first branch flow path 161 is connected to the water inlet flow path, the second branch flow path 162 is connected to the water outlet flow path and / or the first branch flow path 161 and the second branch flow path 162 of at least one heat exchange zone are respectively connected to the water inlet flow path, and at least one third branch flow path 163 is connected to the water outlet flow path.

[0053] Since the branch flow path is a pipeline for circulating the coolant in each heat exchange zone, the structure of the branch flow path will affect the flow of the coolant. Specifically, the branch flow path includes a first branch flow path 161, a second branch flow path 162 and a third branch flow path 163, wherein the first branch flow path 161 and the second branch flow path 162 are respectively arranged on both sides of the corresponding heat exchange area in the first direction, and the third branch flow path 163 is arranged between the first branch flow path 161 and the second branch flow path 162 and is constructed as a plurality of mutually connected. At the same time, the first branch flow path 161 and the second branch flow path 162 can be connected through a plurality of third branch flow paths 163. It can be understood that the coolant in a first branch flow path 161 can enter a plurality of third branch flow paths 163 respectively and then converge into a second branch flow path 162, or the coolant in a second branch flow path 162 can enter a plurality of third branch flow paths 163 respectively and then converge into a first branch flow path 161. The structure and connection relationship of the three branch flow paths enable the coolant to have multiple flow routes in a heat exchange area, thereby increasing the heat exchange area while also prolonging the coolant retention time, thereby improving the heat exchange capacity of the water-cooled plate 1.

[0054] The specific connection relationship of the three branch flow paths is as follows: Figure 1 As shown, in at least one heat exchange zone, the connection relationship between the three branch flow paths can be that the first branch flow path 161 is connected to the water inlet flow path, and the second branch flow path 162 is connected to the water outlet flow path. At this time, multiple third branch flow paths 163 connect the first branch flow path 161 and the second branch flow path 162. The coolant enters from one side of the heat exchange zone and is split at the connection position between the third branch flow path 163 and the first branch flow path 161, and finally flows out from the other side of the heat exchange zone, which prolongs the time that the coolant stays in the heat exchange zone and improves the heat exchange capacity of the heat exchange zone.

[0055] In addition, in at least another heat exchange zone, the connectivity relationship among the three branch flow paths can be that the first branch flow path 161 and the second branch flow path 162 are respectively connected to the water inlet flow path, and at least one third branch flow path 163 is connected to the water outlet flow path. At this time, the coolant entering the heat exchange zone is diverted at the connection between the first branch flow path 161 and the second branch flow path 162, and enters the interior of the heat exchange zone from both sides of the heat exchange zone, thereby improving the heat exchange capacity at the edge of the heat exchange zone.

[0056] According to one embodiment of the utility model, the water inlet flow path includes a first water inlet flow path 171, a second water inlet flow path 172 and a third water inlet flow path 173, one end of the first water inlet flow path 171 is connected to the water inlet 151, at least part of the first water inlet flow path 171 is arranged on the periphery of the first heat exchange area 11, and the other end of the first water inlet flow path 171 is connected to the first branch flow path 161 and the second branch flow path 162 of the second heat exchange area 12; one end of the second water inlet flow path 172 is connected to the water inlet 151, and at least part of the first water inlet flow path 171 is arranged on the periphery of the first heat exchange area 11, and the other end of the first water inlet flow path 171 is connected to the first branch flow path 161 and the second branch flow path 162 of the second heat exchange area 12; one end of the second water inlet flow path 172 is connected to the water inlet The water inlet 151 is connected to the water inlet 151, and the other end of the second water inlet flow path 172 is connected to the first branch flow path 161 and the second branch flow path 162 of the first heat exchange zone 11; one end of the third water inlet flow path 173 is connected to the water inlet 151, and the other end of the third water inlet flow path 173 is connected to the first branch flow path 161 of the third heat exchange zone 13, and / or the other end of the third water inlet flow path 173 is connected to the first branch flow path 161 of the fourth heat exchange zone 14 and at least one third branch flow path 163.

[0057] Since the coolant enters the water-cooled plate 1 through the water inlet flow path, and a plurality of heat exchange zones are provided on the water-cooled plate 1, the structure of the water inlet flow path is to affect the coolant to enter each heat exchange zone. Specifically, the water inlet flow path includes a first water inlet flow path 171, a second water inlet flow path 172, and a third water inlet flow path 173. The three water inlet flow paths are respectively connected to the corresponding heat exchange zones, and the three water inlet flow paths do not interfere with each other, ensuring that the coolant can normally flow into the corresponding heat exchange zone to realize the heat exchange function of the water-cooled plate 1.

[0058] like Figure 3 As shown, the first water inlet flow path 171 connects the second heat exchange area 12 with the water inlet 151. Specifically, one end of the first water inlet flow path 171 is connected to the water inlet 151, and the other end of the first water inlet flow path 171 is connected to the first branch flow path 161 and the second branch flow path 162 of the second heat exchange area 12. It can be understood that in the second heat exchange area 12, the coolant flows from the first branch flow path 161 and the second branch flow path 162 toward the inside of the second heat exchange area 12 at the same time, thereby improving the heat exchange capacity of at least part of the edge of the second heat exchange area 12. In addition, at least part of the first water inlet flow path 171 is arranged on the periphery of the first heat exchange area 11, and heat can be exchanged with the battery cells corresponding to the first heat exchange area 11 at the same time, thereby improving the heat exchange capacity of the first heat exchange area 11.

[0059] like Figure 2As shown, the second water inlet flow path 172 connects the first heat exchange zone 11 with the water inlet 151. Specifically, one end of the second water inlet flow path 172 is connected with the water inlet 151, and the other end of the second water inlet flow path 172 is connected with the first branch flow path 161 and the second branch flow path 162 of the first heat exchange zone 11. It can be understood that in the first heat exchange zone 11, the coolant flows from the first branch flow path 161 and the second branch flow path 162 toward the inside of the first heat exchange zone 11 at the same time, thereby improving the heat exchange capacity of at least part of the edge of the first heat exchange zone 11.

[0060] like Figure 4 and Figure 5 As shown, the third water inlet flow path 173 connects the third heat exchange zone 13 and the fourth heat exchange zone 14 with the water inlet 151 respectively. Specifically, one end of the third water inlet flow path 173 is connected with the water inlet 151, and the other end of the third water inlet flow path 173 is connected with the first branch flow path 161 of the third heat exchange zone 13 and the first branch flow path 161 of the fourth heat exchange zone 14 and a third branch flow path 163 respectively. In the third heat exchange zone 13, the cooling liquid transported by the third water inlet flow path 173 flows into the third heat exchange zone 13 from one side and flows out from the other side. The cooling liquid increases the heat exchange area under the diversion of multiple third branch flow paths 163 in the third heat exchange zone 13, thereby improving the heat exchange capacity of the third heat exchange zone 13; in the fourth heat exchange zone 14, the cooling liquid transported by the third water inlet flow path 173 flows into the fourth heat exchange zone 14 from one side and the middle at the same time and flows out from the other side, which speeds up the flow of the cooling liquid into the fourth heat exchange zone 14, and the middle inflow method can speed up the heat exchange efficiency in the middle of the fourth heat exchange zone 14, thereby improving the overall heat exchange effect of the fourth heat exchange zone 14.

[0061] According to an embodiment of the present utility model, the water outlet flow path includes a first water outlet flow path 181, a second water outlet flow path 182, a third water outlet flow path 183 and a fourth water outlet flow path 184, one end of the first water outlet flow path 181 is connected to at least one third branch flow path 163 of the second heat exchange area 12, and the other end of the first water outlet flow path 181 flows through the outer periphery of the fourth heat exchange area 14 and the third heat exchange area 13 in sequence and connects to the water outlet 152; one end of the second water outlet flow path 182 is connected to at least one third branch flow path 163 of the first heat exchange area 11, and the other end of the second water outlet flow path 182 flows through the outer periphery of the fourth heat exchange area 14 and the third heat exchange area 13 in sequence and connects to the water outlet 152; It passes through the periphery of the second heat exchange zone 12 and the fourth heat exchange zone 14 and is connected with the first water outlet flow path 181; one end of the third water outlet flow path 183 is connected with the first branch flow path 161 of the third heat exchange zone 13, and the other end of the third water outlet flow path 183 flows through the periphery of the third heat exchange zone 13 and is connected with the water outlet 152; one end of the fourth water outlet flow path 184 is connected with the first branch flow path 161 of the fourth heat exchange zone 14 and at least one third branch flow path 163, and the other end of the fourth water outlet flow path 184 flows through the periphery of the fourth heat exchange zone 14 and the periphery of the third heat exchange zone 13 in sequence and is connected with the water outlet 152.

[0062] Since the coolant flows out of the water-cooled plate 1 through the water outlet flow path, and a plurality of heat exchange zones are arranged on the water-cooled plate 1, the structure of the water outlet flow path is to affect the flow of the coolant in each heat exchange zone. Specifically, the water outlet flow path includes the first water outlet flow path 181, the second water outlet flow path 182, the third water outlet flow path 183 and the fourth water outlet flow path 184. The four water outlet flow paths are respectively connected to the corresponding heat exchange zones, and the four water outlet flow paths do not interfere with each other, ensuring that the coolant can flow out of the corresponding heat exchange zone normally, and avoiding the coolant after heat exchange from being retained in the water-cooled plate 1 for a long time to affect the secondary heat exchange function of the water-cooled plate 1.

[0063] like Figure 3 As shown, the first water outlet flow path 181 connects the second heat exchange zone 12 with the water outlet 152. Specifically, one end of the first water outlet flow path 181 is connected to at least one third branch flow path 163 of the second heat exchange zone 12, and the other end of the first water outlet flow path 181 is connected to the water outlet 152. In the second heat exchange zone 12, the coolant enters through the first branch flow path 161 and the second branch flow path 162 on both sides of the second heat exchange zone 12. The coolant entering the second heat exchange zone 12 from both sides can be connected to the first water outlet flow path 181 through a third branch flow path 163 respectively, realizing the phenomenon that the coolant in the second heat exchange zone 12 enters from both sides and exits from the middle, thereby improving the heat exchange capacity at the edge of the second heat exchange zone 12. In addition, the first water outlet flow path 181 also flows through the outer periphery of the fourth heat exchange zone 14 and the third heat exchange zone 13, which can further improve the heat exchange capacity of the fourth heat exchange zone 14 and the third heat exchange zone 13.

[0064] like Figure 2As shown, the second water outlet flow path 182 connects the first heat exchange zone 11 with the water outlet 152. Specifically, one end of the second water outlet flow path 182 is connected to at least one third branch flow path 163 of the first heat exchange zone 11, and the other end of the second water outlet flow path 182 is connected to the first water outlet flow path 181. In the first heat exchange zone 11, the coolant enters through the first branch flow path 161 and the second branch flow path 162 on both sides of the first heat exchange zone 11. The coolant entering the first heat exchange zone 11 from both sides can be connected to the first water outlet flow path 181 through a third branch flow path 163 respectively, realizing the phenomenon that the coolant in the first heat exchange zone 11 enters from both sides and exits from the middle, thereby improving the heat exchange capacity at the edge of the first heat exchange zone 11. In addition, the first water outlet flow path 181 also flows through the outer periphery of the fourth heat exchange zone 14 and the second heat exchange zone 12, which can further improve the heat exchange capacity of the fourth heat exchange zone 14 and the second heat exchange zone 12.

[0065] like Figure 4 As shown, the third water outlet flow path 183 connects the third heat exchange zone 13 with the water outlet 152. Specifically, one end of the third water outlet flow path 183 is connected with at least one third branch flow path 163 of the third heat exchange zone 13, and the other end of the third water outlet flow path 183 is connected with the water outlet 152. In the third heat exchange zone 13, the coolant flows in through the first branch flow path 161 on one side of the third heat exchange zone 13 and flows out from the other side of the third heat exchange zone 13 after being diverted by a plurality of third branch flow paths 163. Different from the first heat exchange zone 11 and the second heat exchange zone 12, the coolant enters from one side and exits from the other side in the third heat exchange zone 13. The coolant can flow fully in the third heat exchange zone 13, thereby improving the heat exchange capacity of the coolant in the third heat exchange zone 13.

[0066] like Figure 5 As shown, the fourth water outlet flow path 184 connects the fourth heat exchange zone 14 with the water outlet 152. Specifically, one end of the fourth water outlet flow path 184 is connected with the first branch flow path 161 and at least one third branch flow path 163 of the fourth heat exchange zone 14, and the other end of the fourth water outlet flow path 184 is connected with the water outlet 152. In the fourth heat exchange zone 14, the coolant flows in through the first branch flow path 161 and one third branch flow path 163 of the fourth heat exchange zone 14 and then flows out from the second branch flow path 162 and one third branch flow path 163, so that the coolant enters from one side and the middle and exits from the other side and the middle in the fourth heat exchange zone 14, thereby improving the heat exchange capacity of the edge and the middle of the fourth heat exchange zone 14 at the same time. In addition, the fourth water outlet flow path 184 also flows through the periphery of the third heat exchange zone 13, further improving the heat exchange effect of the third heat exchange zone 13.

[0067] In some embodiments, three water inlet flow paths and four water outlet flow paths are respectively arranged in coordination with corresponding heat exchange areas, thereby increasing the diversity of coolant flow routes within the water cooling plate 1, enabling the water cooling plate 1 to adapt to different battery cells or battery packs, and increasing the versatility of the water cooling plate 1.

[0068] According to one embodiment of the utility model, the flow resistance of the branch flow path in the first heat exchange zone 11 is R1, the flow resistance of the branch flow path in the second heat exchange zone 12 is R2, the flow resistance of the branch flow path in the third heat exchange zone 13 is R3, and the flow resistance of the branch flow path in the fourth heat exchange zone 14 is R4, satisfying: R1>R2, R3>R4.

[0069] Since the position layout of the four heat exchange zones limits the flow rate of the coolant corresponding to each heat exchange zone, the flow resistance in each heat exchange zone needs to be set according to the layout of each heat exchange zone itself and the water-cooled plate 1. Specifically, the flow resistance of the branch flow path in the first heat exchange zone 11 is R1, the flow resistance of the branch flow path in the second heat exchange zone 12 is R2, the flow resistance of the branch flow path in the third heat exchange zone 13 is R3, and the flow resistance of the branch flow path in the fourth heat exchange zone 14 is R4, wherein R1>R2, R3>R4, that is, the flow rate of the coolant in the first heat exchange zone 11 is less than the flow rate of the coolant in the second heat exchange zone 12, and the flow rate of the coolant in the third heat exchange zone 13 is less than the flow rate of the coolant in the fourth heat exchange zone 14. The setting of the flow resistance in each heat exchange zone makes the heat exchange capacity of the four heat exchange zones of the entire water-cooled plate 1 more balanced, thereby comprehensively improving the heat exchange capacity of the water-cooled plate 1.

[0070] It is worth noting that in the present embodiment, the specific size relationship between the coolant flow rate of the first heat exchange zone 11 and the coolant flow rate of the third heat exchange zone 13 may not be limited. Similarly, the specific size relationship between the coolant flow rate of the second heat exchange zone 12 and the coolant flow rate of the fourth heat exchange zone 14 may not be limited. This is because the setting of the coolant flow rate is mainly determined according to the distance between different heat exchange zones and the water inlet 151. It is only necessary to satisfy that the coolant flow rates of the first heat exchange zone 11 and the third heat exchange zone 13 are relatively close, and the coolant flow rates of the second heat exchange zone 12 and the fourth heat exchange zone 14 are relatively close.

[0071] According to one embodiment of the utility model, the cross-sectional area of ​​the branch flow path in the first heat exchange zone 11 is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone 12 is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone 13 is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone 14 is S4, satisfying: S4>S3, S2>S1.

[0072] Since the position layout of the four heat exchange zones limits the flow rate of the coolant corresponding to each heat exchange zone, and the branch flow path of each heat exchange zone will affect the flow rate of the coolant in the respective heat exchange zone, the cross-sectional area of ​​the branch flow path in each heat exchange zone needs to be set according to the layout of each heat exchange zone itself and the water-cooled plate 1. Specifically, the cross-sectional area of ​​the branch flow path in the first heat exchange zone 11 is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone 12 is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone 13 is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone 14 is S4, and it satisfies: S4>S3, S2>S1. It is worth noting that the cross-sectional area of ​​the branch flow path here can be understood as the cross-sectional area of ​​the pipeline connecting each heat exchange zone with the corresponding water inlet flow path. The larger the cross-sectional area, the greater the flow rate of the coolant entering the heat exchange zone. S4>S3, S2>S1, that is, the flow rate of the coolant in the second heat exchange zone 12 is greater than the flow rate of the coolant in the first heat exchange zone 11, and the flow rate of the coolant in the fourth heat exchange zone 14 is greater than the flow rate of the coolant in the third heat exchange zone 13. The setting of the cross-sectional area of ​​the branch flow path in each heat exchange zone makes the heat exchange capacity of the four heat exchange zones of the entire water-cooled plate 1 more balanced, thereby comprehensively improving the heat exchange capacity of the water-cooled plate 1.

[0073] The vehicle according to the present utility model is briefly described below.

[0074] The vehicle according to the utility model includes the water cooling plate assembly in the above-mentioned embodiment. Since the vehicle according to the utility model includes the water cooling plate assembly in the above-mentioned embodiment, during the operation of the vehicle, the battery pack in the vehicle can be heat exchanged through the water cooling plate assembly. The four heat exchange zones on the water cooling plate 1 can correspond to the battery cells at different positions of the battery pack. The flow design of the heat exchange zone makes the overall heat exchange efficiency of the water cooling plate 1 more balanced, thereby improving the heat exchange capacity of the water cooling plate 1 to the battery pack, ensuring that the battery pack of the vehicle can be at a suitable temperature during operation, thereby improving the safety of the vehicle.

[0075] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0076] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0077] In the description of the present invention, "plurality" means two or more.

[0078] In the description of the present invention, a first feature being “above” or “below” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact but are in contact with each other via another feature therebetween.

[0079] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0080] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0081] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A water cooling plate assembly for a battery pack, characterized in that: include: A water-cooled plate, wherein the water-cooled plate is provided with a water inlet and a water outlet, and a water inlet flow path and a water outlet flow path respectively connected to the water inlet and the water outlet, and the water-cooled plate is formed with a plurality of heat exchange zones, and a cooling flow channel is formed in each of the heat exchange zones; The heat exchange zone comprises: A first heat exchange zone, wherein the first heat exchange zone is arranged adjacent to the water inlet, and the flow rate of the cooling channel in the first heat exchange zone is Q1; a second heat exchange zone, the second heat exchange zone being arranged on a side of the first heat exchange zone away from the water inlet, and the flow rate of the cooling channel in the second heat exchange zone being Q2; A third heat exchange zone, wherein the third heat exchange zone is arranged adjacent to the water outlet, and the flow rate of the cooling channel in the third heat exchange zone is Q3; The fourth heat exchange zone is arranged on the side of the third heat exchange zone away from the water outlet, and the flow rate of the cooling channel in the fourth heat exchange zone is Q4; wherein Q1<Q2;Q3<Q4。 2. The water cooling plate assembly for a battery pack according to claim 1, characterized in that: The first heat exchange zone includes a first sub-zone and a second sub-zone which are connected in parallel and arranged at intervals in a first direction. The flow rate of the cooling channel in the first sub-zone is Q11, the flow rate of the cooling channel in the second sub-zone is Q12, and 0≤|Q11-Q12|≤1.5 is satisfied.

3. The water cooling plate assembly for a battery pack according to claim 2, characterized in that: The first sub-area and the second sub-area are respectively communicated with the water inlet at the sides facing away from each other, and the first sub-area and the second sub-area are respectively communicated with the water outlet at the sides close to each other.

4. The water cooling plate assembly for a battery pack according to claim 3, characterized in that: The second heat exchange zone includes a third sub-zone and a fourth sub-zone which are connected in parallel and arranged at intervals in the first direction; the fourth heat exchange zone includes a fifth sub-zone and a sixth sub-zone which are connected in parallel and arranged at intervals in the first direction; the third sub-zone and the sixth sub-zone are adjacent to each other; in The flow rate of the cooling channel in the third sub-area is Q21, and the flow rate of the cooling channel in the fourth sub-area is Q22, Q21<Q22; The flow rate of the cooling channel in the fifth sub-area is Q41, and the flow rate of the cooling channel in the sixth sub-area is Q42, and Q41>Q42.

5. The water cooling plate assembly for a battery pack according to claim 1, characterized in that: A plurality of branch flow paths parallel to each other are respectively formed in the first heat exchange zone, the second heat exchange zone, the third heat exchange zone and the fourth heat exchange zone. The coolant in at least one branch flow path flows along a first flow direction, and the coolant in at least another branch flow path flows along a second flow direction. The first flow direction is opposite to the second flow direction.

6. The water cooling plate assembly for a battery pack according to claim 5, characterized in that: The number of the branch flow paths along the first flow direction is i1, and the number of the branch flow paths along the second flow direction is i2, satisfying: 0.3≤i1 / i2≤1.

7. The water cooling plate assembly for a battery pack according to claim 6, characterized in that: The plurality of branch flow paths include: a first branch flow path and a second branch flow path, wherein the first branch flow path and the second branch flow path are respectively arranged on both sides of the heat exchange area in a first direction; A third branch flow path, wherein the third branch flow paths are structured to be connected to each other in plurality, and the plurality of the third branch flow paths are arranged between the first branch flow path and the second branch flow path, and the first branch flow path and the second branch flow path are connected through the plurality of the third branch flow paths; In at least one heat exchange zone, the first branch flow path is connected to the water inlet flow path, the second branch flow path is connected to the water outlet flow path and / or The first branch flow path and the second branch flow path of at least one heat exchange zone are respectively connected to the water inlet flow path, and at least one third branch flow path is connected to the water outlet flow path.

8. The water cooling plate assembly for a battery pack according to claim 7, characterized in that: The water inlet flow path comprises: a first water inlet flow path, one end of which is in communication with the water inlet, at least a portion of which is disposed at the periphery of the first heat exchange zone, and the other end of which is in communication with the first branch flow path and the second branch flow path of the second heat exchange zone; a second water inlet flow path, one end of which is in communication with the water inlet, and the other end of which is in communication with the first branch flow path and the second branch flow path of the first heat exchange zone; A third water inlet flow path, one end of the third water inlet flow path is connected to the water inlet, the other end of the third water inlet flow path is connected to the first branch flow path of the third heat exchange zone, and / or the other end of the third water inlet flow path is connected to the first branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths.

9. The water cooling plate assembly for a battery pack according to claim 8, characterized in that: The water outlet flow path comprises: a first water outlet flow path, one end of which is connected to at least one of the third branch flow paths in the second heat exchange zone, and the other end of which flows through the outer peripheries of the fourth heat exchange zone and the third heat exchange zone in sequence and is connected to the water outlet; a second water outlet flow path, one end of which is connected to at least one of the third branch flow paths of the first heat exchange zone, and the other end of which flows through the peripheries of the second heat exchange zone and the fourth heat exchange zone in sequence and is connected to the first water outlet flow path; a third water outlet flow path, one end of which is connected to at least one of the third branch flow paths in the third heat exchange zone, and the other end of which flows through the periphery of the third heat exchange zone and is connected to the water outlet; A fourth water outlet flow path, one end of which is connected to the second branch flow path of the fourth heat exchange zone and at least one of the third branch flow paths, and the other end of which flows through the periphery of the fourth heat exchange zone and the periphery of the third heat exchange zone in sequence and is connected to the water outlet.

10. The water cooling plate assembly for a battery pack according to claim 5, characterized in that: The flow resistance of the branch flow path in the first heat exchange zone is R1, the flow resistance of the branch flow path in the second heat exchange zone is R2, the flow resistance of the branch flow path in the third heat exchange zone is R3, and the flow resistance of the branch flow path in the fourth heat exchange zone is R4, satisfying: R1>R2, R3>R4.

11. The water cooling plate assembly for a battery pack according to claim 5, characterized in that: The cross-sectional area of ​​the branch flow path in the first heat exchange zone is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone is S4, satisfying: S4>S3, S2>S1.

12. A vehicle, characterized in that: The water-cooling plate assembly comprises any one of claims 1 to 11.

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