Cooling plate assembly and battery pack

Abstract

The utility model discloses a cooling plate assembly and a battery pack, the cooling plate assembly comprises a cooling plate body and a cooling flow channel arranged in the cooling plate body, the cooling plate body is provided with a water inlet and a water outlet, and the water inlet and the water outlet are located at the same side edge of the cooling plate body; the water inlet and the water outlet are both located at the position close to one corner of the cooling plate body, and the two ends of the cooling flow channel are connected with the water inlet and the water outlet correspondingly. The distances between the water inlets and the water outlets of the cooling plate assembly are very close, so that the temperatures of the battery cells at the end parts of the battery modules of which the water inlets and the water outlets are positioned at the top of the cooling plate assembly are balanced, the condition of supercooling or superheating is avoided, the temperature difference between the battery cells of the whole battery module is balanced, the performance of the battery pack is ensured, and the service life of the battery pack is prolonged. The water inlet and the water outlet do not need to be formed in the middle of one end of the cooling plate body in the length direction, the length of the cooling plate body does not need to be prolonged, the aluminum material consumption is reduced, meanwhile, the liquid injection amount is reduced, pressure drop is not increased, and the cost of the battery pack is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack technical field more specifically, relate to a kind of cooling plate assembly and battery pack. BACKGROUND

[0002] As shown in 1 and Figure 2 Battery pack usually includes multiple battery modules 2 and cooling plate assembly 1, battery module 2 is arranged on cooling plate assembly 1, each battery module 2 is sequentially arranged along the direction of the width of cooling plate assembly 1. Cooling plate assembly 1 usually includes cooling flow channel, water inlet 111 and water outlet 112, cooling plate assembly 1 has two end edges 113 and two side edges 114, two end edges 113 are arranged in parallel, two side edges 114 are connected to the two ends of two end edges 113 respectively. Water inlet 111 and water outlet 112 are arranged on one end edge 113, a plurality of partition ribs 116 are arranged in cooling flow channel, each partition rib 116 is vertically connected to one end edge 113 at one end, and has a gap with the other end edge 113 at the other end. Each partition rib 116 divides the cooling flow channel to form a first flow channel, a second flow channel, a third flow channel and a fourth flow channel. The water inlet is connected to the first flow channel, the first flow channel is connected to the second flow channel, the second flow channel is connected to the third flow channel, the third flow channel is connected to the fourth flow channel, and the fourth flow channel is connected to the water outlet. Water inlet 111 and water outlet 112 are arranged on both sides of the partition rib 116 located in the middle of the cooling flow channel, that is, water inlet 111 and water outlet 112 are located at one end of the first flow channel and the fourth flow channel respectively, forming a water flow channel from water inlet→first flow channel→second flow channel→third flow channel→fourth flow channel→water outlet. In the prior art, the distance between water inlet 111 and water outlet 112 is far, the temperature at water inlet 111 is low, and the water temperature will rise when the cooling water passes through the water flow channel to the vicinity of water outlet 112. This results in a large temperature difference between the battery cells above the water inlet 111 and the water outlet 112, affecting the performance and service life of the battery pack. SUMMARY

[0003] To solve one of the above technical defects, a cooling plate assembly and a battery pack are provided in the embodiments of the present application.

[0004] The application adopts the following technical solutions:

[0005] The first object of the present application is to provide a cooling plate assembly and a battery pack, comprising:

[0006] The cooling plate body and the cooling flow channel arranged in the cooling plate body, the water inlet and the water outlet are arranged on the cooling plate body, the water inlet and the water inlet are located on the same side edge of the cooling plate body, and the water inlet and the water outlet are located near the corner of the cooling plate body. The two ends of the cooling flow channel are connected to the water inlet and the water outlet respectively.

[0007] Optionally, the cooling plate assembly is used for arranging the battery module, and the cooling plate body has two end edges and two side edges, and the side edges extend along the length direction of the battery module;

[0008] The water inlet and the water outlet are arranged on the side edge close to one side of the end edge, and the water inlet and the water outlet are arranged along the length direction of the side edge.

[0009] Optionally, the distance between the water inlet and the water outlet is 3-8 cm.

[0010] Optionally, the cooling plate body is provided with a rim rib and a partition rib;

[0011] The rim rib extends along the rim of the cooling plate body;

[0012] The partition rib is located inside the rim rib, one end of the partition rib is connected to the rim rib, and the water inlet and the water outlet are located on both sides of the partition rib;

[0013] The partition rib and the rim rib cooperate inside the cooling plate body to form the cooling flow channel.

[0014] Optionally, the rim rib includes two end ribs and two side ribs, the two end ribs are respectively arranged on the two end edges of the cooling plate body, and the two side ribs are respectively arranged on the two side edges of the cooling plate body;

[0015] The water inlet and the water outlet are arranged close to one side edge rib;

[0016] The partition rib has a first partition rib, the first partition rib is connected perpendicularly to one side of the side rib close to the end rib, and the water inlet and the water outlet are located on both sides of the first partition rib.

[0017] Optionally, the partition rib includes a second partition rib, a third partition rib and a fourth partition rib;

[0018] The second partition rib and the fourth partition rib are parallel to the side rib;

[0019] The second partition rib is connected to the first partition rib, and the third partition rib is connected perpendicularly to the second partition rib and the fourth partition rib respectively;

[0020] The second partition rib and the corresponding side rib form a first flow channel, the fourth partition rib and the corresponding side rib form a fourth flow channel, and the second partition rib, the third partition rib and the fourth partition rib form a second flow channel and a third flow channel;

[0021] The first flow channel is communicated with the fourth flow channel, the fourth flow channel is communicated with the third flow channel, the third flow channel is communicated with the second flow channel, the first flow channel is communicated with the water inlet, and the second flow channel is communicated with the water outlet.

[0022] Optionally, a plurality of flow distribution ribs are arranged in the first flow channel, the second flow channel, the third flow channel and the fourth flow channel, and each flow distribution rib is parallel to the side rib.

[0023] Optionally, a turbulence rib is arranged on the cooling plate body, the turbulence rib is arranged at a water inlet side of a flow distribution rib away from an upstream flow channel, and is located on the same line with the corresponding flow distribution rib, and the turbulence rib and the corresponding flow distribution rib have a spacing therebetween.

[0024] The flow channel includes the first flow channel, the second flow channel, the third flow channel and the fourth flow channel.

[0025] Optionally, the third separation rib is close to the edge rib.

[0026] The fifth separation rib is vertically connected to the end rib away from the third separation rib.

[0027] The fifth separation rib is located between the fourth separation rib and the second separation rib.

[0028] The second flow channel is formed between the fifth separation rib and the second separation rib, the third flow channel is formed between the fifth separation rib and the fourth separation rib, and the fifth separation rib and the third separation rib have a spacing therebetween.

[0029] The second purpose of the present application is to provide a battery pack, characterized in that it comprises:

[0030] The cooling plate assembly as described above has a water inlet nozzle and a water outlet nozzle, the water inlet nozzle is communicated with the water inlet, and the water outlet nozzle is communicated with the water outlet.

[0031] A battery module is arranged on the cooling plate assembly.

[0032] A cover body is connected to the cooling plate assembly, and the cover body covers the battery module.

[0033] By adopting the above technical solution, the present application has the following beneficial effects:

[0034] The inlet and outlet water ports of the cooling plate assembly of the application are very close, so that the inlet and outlet water ports are located at the end of the battery module on the top of the cooling plate assembly, the temperature of the battery cells is balanced, and the overcooling or overheating situation does not occur, so that the temperature difference between the battery cells of the whole battery module is balanced, the performance of the battery pack is ensured, and the service life of the battery pack is prolonged. The inlet and outlet water ports do not need to be arranged at the middle position of one end of the cooling plate body in the length direction, the length of the cooling plate body does not need to be lengthened, the amount of aluminum material is saved, the liquid injection amount is also reduced, the pressure drop is not increased, and the cost of the battery pack is reduced.

[0035] The specific embodiments of the utility model will be described in further detail below in combination with the drawings. DRAWINGS

[0036] The drawings are part of the present application, which is used to provide further understanding of the utility model, the schematic embodiments of the utility model and the description thereof are used to explain the utility model, but do not constitute improper limitation on the utility model. Obviously, the drawings in the following description are only some embodiments, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0037] Figure 1 It is the internal structure schematic diagram of the cooling plate assembly in the prior art;

[0038] Figure 2 It is the structure schematic diagram of the battery pack in the prior art;

[0039] Figure 3 It is the sectional view of the cooling plate assembly provided by the embodiment of the application;

[0040] Figure 4 It is the top view of the cooling plate assembly provided by the embodiment of the application;

[0041] Figure 5 It is the structure schematic diagram of the battery pack provided by the embodiment of the application.

[0042] In the drawings: cooling plate assembly 1, cooling plate body 11, inlet water port 111, outlet water port 112, end edge 113, side edge 114, edge rib 115, end rib 1151, side rib 1152, partition rib 116, first partition rib 1161, second partition rib 1162, third partition rib 1163, fourth partition rib 1164, fifth partition rib 1165, spoiler rib 117, cooling flow channel 12, first flow channel 121, second flow channel 122, third flow channel 123, fourth flow channel 124, flow dividing rib a, inlet nozzle 13, outlet nozzle 14, battery module 2, cover 3.

[0043] It should be noted that the drawings and the written description are not intended to limit the scope of the present application in any way, but are merely to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments will be described clearly and completely below with reference to the drawings in the embodiments of the present application. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0045] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are merely for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0046] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] Embodiment one

[0048] Referring to Figures 3 to 5 As shown in the drawings, the present application provides a cooling plate assembly 1, comprising: a cooling plate body 11 and a cooling flow channel 12 arranged in the cooling plate body 11, the cooling plate body 11 is provided with a water inlet 111 and a water outlet 112, the water inlet 111 and the water inlet 111 are located on the same side edge of the cooling plate body 11, and the water inlet 111 and the water outlet 112 are located near a corner of the cooling plate body 11, and the two ends of the cooling flow channel 12 are connected with the water inlet 111 and the water outlet 112 respectively. The distance between the water inlet and the water outlet of the cooling plate assembly 1 of the present application is very close, so that the temperature of the battery module at the end of the cooling plate assembly at the top is balanced, and the situation of overcooling or overheating does not occur, so that the temperature difference between the battery modules is balanced, the performance of the battery pack is ensured, and the service life of the battery pack is prolonged. The water inlet and the water outlet do not need to be arranged at the middle position of one end of the cooling plate body in the length direction, the length of the cooling plate body does not need to be extended, the amount of aluminum material is saved, the liquid injection amount is reduced, the pressure drop is not improved, and the cost of the battery pack is reduced.

[0049] The cooling plate assembly 1 is used for setting the battery module 2, the cooling plate body 11 has two end edges 113 and two side edges 114, the side edges 114 extend along the length direction of the battery module 2. A plurality of battery modules 2 can be arranged on the cooling plate assembly 1, each battery module 2 is arranged in sequence along the width direction of the cooling plate assembly 1, that is, the end edges 113 extend along the width direction of the battery module 2. The water inlet 111 and the water outlet 112 are located on the side edge 114 close to one side of the end edge 113, and the water inlet 111 and the water outlet 112 are arranged in sequence along the length direction of the side edge 114. The extension direction of the end edge 113 is parallel to the plane where the end plate of the battery module 2 is located, the end edge 113 and the side edge 114 are connected vertically, the connection position forms the corner, and the water inlet 111 and the water outlet 112 are located on the side edge 114 close to the corner position. The flow channel near the water inlet and the flow channel near the water outlet are very close, the liquid in the two flow channels can exchange heat, which is beneficial to balance the temperature, and the distance between the water inlet 111 and the water outlet 112 is close, and close to one or several adjacent battery cells, the high temperature and the low temperature are complementary, so that the temperature of the end battery cell in each row of battery cells is moderate and balanced, and will not be overheated or overcooled.

[0050] The distance between the water inlet 111 and the water outlet 112 can be 3cm-8cm. The distance between the water inlet 111 and the water outlet 112 is close, the water inlet 111 and the water outlet 112 need to be connected with the water inlet mother pipe and the water outlet mother pipe outside the battery pack respectively, and 3cm-8cm is the reserved distance, which can facilitate the connection of the water inlet mother pipe and the water outlet mother pipe.

[0051] In one possible implementation, the cooling plate body 11 is provided with a rim 115 and a partition 116. The rim 115 extends along the edge of the cooling plate body 11. The partition 116 is located inside the rim 115, and one end of the partition 116 is connected to the rim 115. The water inlet 111 and the water outlet 112 are located on both sides of the partition 116. The partition 116 and the rim 115 cooperate to form the cooling flow channel inside the cooling plate body 11. The cooling plate body 11 can include an upper plate body, a lower plate body, and the partition 116. The upper plate body is parallel to the lower plate body. The upper plate body, the lower plate body, and the rim 115 enclose a cavity. The partitions 116 are located in the cavity and connected between the upper plate body and the lower plate body. The partitions 116 can be integrally formed with the upper plate body or the lower plate body, or integrally formed with the upper plate body and the lower plate body. The partitions 116 and the rim 115 cooperate to divide the cavity to form the cooling flow channel 12.

[0052] The rim 115 includes two end portions 1151 and two side portions 1152. The two end portions 1151 are located on the two end edges 113 of the cooling plate body 11, and the two side portions 1152 are located on the two side edges 114 of the cooling plate body 11. The water inlet 111 and the water outlet 112 are located close to one of the side portions 1152. The partition 116 has a first partition 1161, which is connected perpendicularly to the side portion 1152 close to the end portion 1151. The water inlet 111 and the water outlet 112 are located on both sides of the first partition 1161. The first partition 1161 separates the water flow at the water inlet 111 and the water outlet 112.

[0053] The partition ribs 116 include a second partition rib 1162, a third partition rib 1163, and a fourth partition rib 1164. The second partition rib 1162 and the fourth partition rib 1164 are parallel to the side edge rib 1152. The second partition rib 1162 is connected to the first partition rib 1161, and the third partition rib 1163 is connected to the second partition rib 1162 and the fourth partition rib 1164, respectively. The first flow channel 121 is formed between the second partition rib 1162 and the side edge rib 1152 on the corresponding side, the fourth flow channel 124 is formed between the fourth partition rib 1164 and the side edge rib 1152 on the corresponding side, and the second flow channel 122 and the third flow channel 123 are formed between the second partition rib 1162, the third partition rib 1163, and the fourth partition rib 1164. The first flow channel 121 communicates with the fourth flow channel 124, the fourth flow channel 124 communicates with the third flow channel 123, the third flow channel 123 communicates with the second flow channel 122, the first flow channel 121 communicates with the water inlet 111, and the second flow channel 122 communicates with the water outlet 112. A one-way water flow channel is formed in the cavity from the water inlet 111 to the first flow channel 121, to the fourth flow channel 124, to the third flow channel 123, to the second flow channel 122, and to the water outlet 112.

[0054] A plurality of flow dividing ribs a are arranged inside the first flow channel 121, the second flow channel 122, the third flow channel 123, and the fourth flow channel 124, and each flow dividing rib a is parallel to the side edge rib 1152. Each flow dividing rib a divides each flow channel into a plurality of flow passages, which is beneficial for uniformly adjusting the water flow in each flow channel, so that the water flow is balanced and local overheating or cooling is avoided, and the temperature of each battery cell in the battery module 2 on the upper part of the cooling plate body 11 is balanced.

[0055] In a possible implementation, a turbulence rib 117 is arranged on the cooling plate body 11 and is arranged at a water inlet side of a flow dividing rib a in a flow channel away from an upstream flow channel and is located on the same line as the corresponding flow dividing rib a, and the turbulence rib 117 and the corresponding flow dividing rib a have a spacing. The flow channels include the first flow channel 121, the second flow channel 122, the third flow channel 123, and the fourth flow channel 124, and the first flow channel 121, the second flow channel 122, the third flow channel 123, and the fourth flow channel 124 form the cooling flow channel 12. The water flow in the flow passage away from the upstream flow channel is large, so that the water flow in the flow passage away from the upstream flow channel is large, which is not conducive to the balanced distribution of the water flow. The turbulence rib 117 can block part of the water flow from entering the flow passage away from the upstream flow channel, so that the water flow in the cooling flow channel 12 is relatively balanced.

[0056] The cooling plate body 11 is provided with multiple turbulence fins 117. Taking the fourth flow channel 124 entering the third flow channel 123 as an example, since the cooling water flows forward according to the inertial force, this makes the cooling water more enter the shunt passages of the third flow channel 123 far away from the fourth partition fin 1164. This makes the uniformity of each shunt passage of the third flow channel 123 group poor. The turbulence fin 117 is not directly connected with the edge fin 115, so that the cooling water can enter the first two shunt passages in the third flow channel 123 as much as possible. The setting of the turbulence fin 117 can balance the shunt of the cooling water in the fourth flow channel 124 group as much as possible.

[0057] The third partition fin 1163 is close to an edge fin 115. The end fin 1151 far away from the third partition fin 1163 is vertically connected with a fifth partition fin 1165. The fifth partition fin 1165 is located between the fourth partition fin 1164 and the second partition fin 1162. The second flow channel 122 is formed between the fifth partition fin 1165 and the second partition fin 1162. The third flow channel 123 is formed between the fifth partition fin 1165 and the fourth partition fin 1164. The fifth partition fin 1165 and the third partition fin 1163 have a spacing. The setting of multiple partition fins 116 makes the cooling water flow spread throughout the cooling plate body 11, and the water flow is balanced, and the cooling effect of the battery module 2 is good.

[0058] Embodiment two

[0059] The application also provides a battery pack, which comprises the cooling plate assembly 1, the battery module 2 and the cover 3. The cooling plate assembly 1 has the water inlet 13 and the water outlet 14. The water inlet 13 is communicated with the water inlet 111. The water outlet 14 is communicated with the water outlet 112. The battery module 2 is arranged on the cooling plate assembly 1. The cover 3 is connected with the cooling plate assembly 1. The cover 3 covers the battery module 2. The cover 3 is sealingly connected with the outer edge of the cooling plate assembly 1, and plays the roles of insulation, waterproof and strength enhancement of the battery pack.

[0060] The battery pack is externally provided with two female pipes, both of which extend along the arrangement direction of each battery pack, and are respectively an inlet pipe and an outlet pipe, the inlet pipe is connected to the water inlet nozzle 13 of each battery pack, and the outlet pipe is connected to the water outlet nozzle 14 of each battery pack. In the prior art, the water inlet nozzle 13 and the water outlet nozzle 14 are far away from the female pipe, and the water inlet nozzle 13 and the water outlet nozzle 14 are connected to the female pipe through a sub-pipe, thereby increasing the cost. In the battery pack of the present application, the water inlet nozzle 13 and the water outlet nozzle 14 are very close to the female pipe, and no sub-pipe is needed to connect between the female pipe and the water inlet nozzle 13 and the water outlet nozzle 14, the length of the water inlet nozzle 13 and the water outlet nozzle 14 can be set a little longer, the inlet pipe can be directly connected to the water inlet nozzle 13 of each battery pack, and the outlet pipe can be directly connected to the water outlet nozzle 14 of each battery pack, thereby reducing the manufacturing cost, simplifying the pipeline connection structure, and facilitating the assembly and improving the assembly efficiency.

[0061] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above-mentioned technical content without departing from the technical solution of the present application, and any simple modification, equivalent change and modification of the above-mentioned technical content without departing from the technical solution of the present application are still within the scope of the present application.

Claims

1. A cooling plate assembly, characterized by The application relates to a cooling plate assembly, which comprises a cooling plate body and a cooling flow channel arranged in the cooling plate body, a water inlet and a water outlet are arranged on the cooling plate body, the water inlet and the water outlet are located on the same side edge of the cooling plate body, and the water inlet and the water outlet are located close to a corner of the cooling plate body, and the two ends of the cooling flow channel are connected with the water inlet and the water outlet respectively. The cooling plate assembly is used for arranging a battery module, the cooling plate body has two end edges and two side edges, and the side edges extend along the length direction of the battery module.

2. The cooling plate assembly of claim 1, wherein, The water inlet and the water outlet are located on one side of the side edge close to the end edge, and the water inlet and the water outlet are arranged along the length direction of the side edge in sequence. The distance between the water inlet and the water outlet is 3-8 cm.

3. The cooling panel assembly of claim 1, wherein, The cooling plate body is provided with an edge rib and a partition rib.

4. The cooling panel assembly of claim 1, wherein, The edge rib extends along the edge of the cooling plate body. The partition rib is located on the inner side of the edge rib, one end of the partition rib is connected with the edge rib, and the water inlet and the water outlet are located on the two sides of the partition rib. The partition rib and the edge rib cooperate to form the cooling flow channel in the cooling plate body. The edge rib comprises two end ribs and two side ribs, the two end ribs are located on the two end edges of the cooling plate body respectively, and the two side ribs are located on the two side edges of the cooling plate body respectively.

5. The cooling panel assembly of claim 4, wherein, The water inlet and the water outlet are arranged close to one side rib. The partition rib has a first partition rib, the first partition rib is connected with the side rib close to the end rib perpendicularly, and the water inlet and the water outlet are located on the two sides of the first partition rib. The partition rib comprises a second partition rib, a third partition rib and a fourth partition rib.

6. The cooling panel assembly of claim 5, wherein, The second partition rib and the fourth partition rib are parallel to the side rib. The second partition rib is connected with the first partition rib, and the third partition rib is connected with the second partition rib and the fourth partition rib perpendicularly. The second partition rib and the corresponding side rib form a first flow channel, the fourth partition rib and the corresponding side rib form a fourth flow channel, and the second partition rib, the third partition rib and the fourth partition rib form a second flow channel and a third flow channel. The first flow channel is communicated with the fourth flow channel, the fourth flow channel is communicated with the third flow channel, the third flow channel is communicated with the second flow channel, the first flow channel is communicated with the water inlet, and the second flow channel is communicated with the water outlet. A plurality of branch ribs are arranged in the inner sides of the first flow channel, the second flow channel, the third flow channel and the fourth flow channel, and each branch rib is parallel to the side rib.

7. The cooling plate assembly of claim 6, wherein, A turbulence rib is arranged on the cooling plate body, the turbulence rib is arranged on the water inlet side of a branch rib far away from an upstream flow channel in a part of the flow channel, the turbulence rib is located on the same straight line with the corresponding branch rib, and the turbulence rib and the corresponding branch rib have a spacing.

8. The cooling panel assembly of claim 6, wherein, The flow channel comprises the first flow channel, the second flow channel, the third flow channel and the fourth flow channel. The third partition rib is close to one edge rib.

9. The cooling panel assembly of claim 6, wherein, A fifth partition rib is connected with the end rib far away from the third partition rib perpendicularly. ​ The fifth partitioning rib is located between the fourth partitioning rib and the second partitioning rib. The second flow channel is formed between the fifth partitioning rib and the second partitioning rib, the third flow channel is formed between the fifth partitioning rib and the fourth partitioning rib, and the fifth partitioning rib and the third partitioning rib have a spacing.

10. A battery pack, characterized by, Comprising: The cooling plate assembly of any one of claims 1-9, having a water inlet nozzle and a water outlet nozzle, the water inlet nozzle being in communication with the water inlet, and the water outlet nozzle being in communication with the water outlet; A battery module disposed on the cooling plate assembly; A cover connected to the cooling plate assembly, the cover covering the battery module.

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