Battery tray and battery assembly

Abstract

The invention discloses a battery tray and a battery assembly, and the battery tray comprises a frame which is arranged in a surrounding manner so as to define a battery accommodating cavity in the frame; the heat exchange plate is arranged at the bottom of the frame and seals the battery accommodating cavity; the extension plate is connected with the heat exchange plate and is provided with a periphery protruding out of the frame, a cooling flow channel suitable for heat exchange in the battery accommodating cavity is formed in the heat exchange plate, and a water inlet and a water outlet which are communicated with the cooling flow channel are formed in the extension plate. According to the battery tray, the extension plate is connected with the heat exchange plate, the extension plate protrudes out of the periphery of the frame, the water inlet / outlet of the heat exchange plate is formed in the extension plate, and the water inlet / outlet of the heat exchange plate is formed outside the frame, so that when the water inlet / outlet leaks, cooling liquid cannot flow into a battery assembly; the internal short circuit of the battery assembly is effectively prevented, the safety and the reliability of the battery assembly during operation are ensured, and the maintenance difficulty of the water inlet and the water outlet of the heat exchange plate is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and more particularly to a battery tray and a battery assembly. Background Art

[0002] In the related art, for the battery assembly of a vehicle, the heat exchange plate plays a crucial role in cooling the battery assembly. In a traditional battery assembly, the water inlet and outlet of the heat exchange plate are generally arranged inside the frame of the battery assembly. When the water inlet and outlet of the heat exchange plate leak, it may cause a short circuit inside the battery assembly and a sharp rise in the temperature of the battery pack, seriously affecting the safety and reliability of the battery assembly during operation. At the same time, it will also shorten the battery performance and life.

[0003] In addition, since the water inlet and outlet of the heat exchange plate are arranged inside the battery assembly, it is difficult to repair the heat exchange plate. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, an object of the present invention is to provide a battery tray. The battery tray according to the present invention is connected to the heat exchange plate through an extension plate. The extension plate protrudes from the outer periphery of the frame, and the water inlet and outlet of the heat exchange plate are formed on the extension plate. By arranging the water inlet and outlet of the heat exchange plate outside the frame, when the water inlet and outlet leak, the coolant will not flow into the battery assembly, effectively preventing a short circuit inside the battery assembly, ensuring the safety and reliability of the battery assembly during operation, and at the same time reducing the maintenance difficulty of the water inlet and outlet of the heat exchange plate.

[0005] The present invention also provides a battery assembly having the above battery tray.

[0006] The battery tray according to the present invention includes: a frame, which is arranged in a surrounding manner to define a battery accommodation cavity inside the frame; a heat exchange plate, which is arranged at the bottom of the frame and closes the battery accommodation cavity; an extension plate, which is connected to the heat exchange plate and protrudes from the outer periphery of the frame; wherein, a cooling flow channel suitable for heat exchange in the battery accommodation cavity is formed in the heat exchange plate, and a water inlet and a water outlet communicated with the cooling flow channel are formed on the extension plate.

[0007] According to the present invention, a battery tray has a battery accommodation cavity formed within a frame. A heat exchange plate is disposed at the bottom of the frame, and an extension plate is disposed at the outer peripheral edge of the frame. The extension plate is connected to the heat exchange plate and protrudes beyond the outer periphery of the frame and extends in a direction away from the battery accommodation cavity. An inlet and an outlet are formed on the extension plate, and the inlet and the outlet are respectively in communication with a cooling flow channel, such that the inlet and the outlet of the heat exchange plate are disposed outside the frame. When leakage occurs at the inlet or the outlet of the heat exchange plate, the coolant will not flow into the interior of the battery assembly, effectively preventing a short circuit inside the battery assembly and ensuring the safety and reliability of the battery assembly during operation. At the same time, since the present application disposes the inlet and the outlet of the heat exchange plate outside the frame, it is possible to repair and maintain the inlet and the outlet of the heat exchange plate without disassembling the battery assembly, making the repair and maintenance of the inlet and the outlet of the heat exchange plate more convenient and fast.

[0008] According to some embodiments of the present invention, the opening directions of the inlet and the outlet are the same as the extending direction of the heat exchange plate.

[0009] According to some embodiments of the present invention, the extension plate includes: a body portion, the body portion is connected to the heat exchange plate and has the same extending direction as the heat exchange plate, and the body portion protrudes beyond the outer periphery of the frame; a connection box, the connection box is disposed on one side of the body portion in the thickness direction, the inlet and the outlet are disposed on the connection box, and a first cavity and a second cavity are formed inside the connection box, which respectively communicate the cooling flow channel with the inlet and the outlet.

[0010] According to some embodiments of the present invention, the connection box includes: a housing, the inlet and the outlet are formed on one side of the housing facing away from the frame; a baffle plate, the baffle plate is disposed inside the housing and divides the interior of the housing into a first chamber and a second chamber, the first chamber is respectively in communication with the inlet and the cooling flow channel, and the second chamber is respectively in communication with the outlet and the cooling flow channel.

[0011] According to some embodiments of the present invention, a first flow path and a second flow path extending in the horizontal direction are formed inside the body portion. The first flow path communicates the first cavity with the cooling flow channel, and the second flow path communicates the second cavity with the cooling flow channel; a first guiding wall is formed inside the first cavity, the first guiding wall forms a first wall facing the first flow path and a second wall facing the inlet, and there is an arc transition between the first wall and the second wall; a second guiding wall is formed inside the second cavity, the second guiding wall forms a third wall facing the second flow path and a fourth wall facing the outlet, and there is an arc transition between the third wall and the fourth wall.

[0012] According to some embodiments of the present invention, the heat exchange plate includes: a first heat exchange plate and a second heat exchange plate. A flow channel groove is formed in the first heat exchange plate. The second heat exchange plate covers the first heat exchange plate and closes the flow channel groove to define the cooling flow channel. The body part includes: a first adapter plate and a second adapter plate. The first adapter plate and the first heat exchange plate are configured as an integral part, and an adapter groove communicating with the flow channel groove is formed in the first adapter plate. The second adapter plate and the second heat exchange plate are configured as an integral part, cover the first adapter plate and close the adapter groove to define an adapter flow channel communicating with the cooling flow channel. Wherein the adapter box is arranged on one side in the thickness direction of the second adapter plate, and adapter holes for communicating the adapter flow channel with the first cavity and the second cavity respectively are formed in the second adapter plate.

[0013] According to some embodiments of the present invention, a first connecting piece and a second connecting piece are formed on the side wall of the frame. The body part is between the first connecting piece and the second connecting piece. A first side edge is arranged on one side of the body part close to the first connecting piece, and a second side edge is arranged on one side of the body part close to the second connecting piece. The first side edge and the second side edge extend obliquely towards each other in a direction away from the frame.

[0014] According to some embodiments of the present invention, a first ear and a second ear are respectively arranged on two sides of the housing in the width direction. The first ear and the second ear are respectively fixedly connected to the body part.

[0015] According to some embodiments of the present invention, the battery tray further includes: a connecting plate. The connecting plate is arranged on one side in the thickness direction of the extension plate and connects the extension plate to the frame.

[0016] According to some embodiments of the present invention, the connecting plate includes: a main body part. The main body part is arranged on one side in the thickness direction of the extension plate and is fixed to the extension plate. A first side plate and a second side plate. The first side plate and the second side plate are arranged on two sides in the width direction of the main body part and respectively extend to the frame. The first side plate and the second side plate are respectively opposite to and connected to the end faces in the thickness direction of the frame.

[0017] The battery assembly according to the present invention is briefly described below.

[0018] The battery assembly according to the present invention is provided with the battery tray of any one of the above embodiments. Since the battery assembly according to the present invention is provided with the battery tray of any one of the above embodiments, a battery pack is further provided in the battery assembly. The battery pack is configured to be a plurality of battery packs arranged in sequence in the first direction, and each battery pack is provided with a plurality of battery cells arranged in sequence in the second direction. The battery pack is received in the battery receiving cavity. Therefore, by arranging the water inlet and the water outlet of the heat exchange plate outside the frame, the battery assembly according to the present application can be directly assembled with the vehicle in the y direction without adding a water path conversion component, making the assembly and disassembly efficiency of the battery assembly and the electrical equipment higher. In addition, since the water inlet and the water outlet of the heat exchange plate are arranged outside the battery assembly, the maintenance of the battery assembly is more convenient. At the same time, when the water inlet and the water outlet leak, it will not affect the inside of the battery assembly, improving the safety and reliability of the battery assembly during operation.

[0019] According to some embodiments of the present invention, the heat exchange plate is provided with a water inlet, a water outlet, an inlet water flow path connected to the water inlet, and an outlet water flow path communicated with the water outlet. The heat exchange plate is provided with heat exchange areas corresponding to a plurality of the battery packs, and a plurality of branch flow paths corresponding to each of the battery packs are arranged in the heat exchange areas. The upstream end of the branch flow path is communicated with the inlet water flow path, and the downstream end of the branch flow path is communicated with the outlet water flow path.

[0020] According to some embodiments of the present invention, in one of the heat exchange areas, a plurality of the branch flow paths respectively extend along the second direction and are spaced apart in the first direction. The coolant in at least one of the branch flow paths 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.

[0021] According to some embodiments 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.

[0022] According to some embodiments of the present invention, the plurality of branch flow paths include: a first branch flow path and a second branch flow path, the first branch flow path and the second branch flow path are respectively arranged on two sides of the heat exchange area in a first direction; a third branch flow path, a plurality of the third branch flow paths are constructed to be connected to each other, and the plurality of branch flow paths are arranged between the first branch flow path and the second branch flow path; wherein the first branch flow path and the second branch flow path are connected through the plurality of third branch flow paths; wherein in at least one heat exchange area, 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 in at least one heat exchange area, the first branch flow path and the second branch flow path are respectively connected to the water inlet flow path, and at least one of the third branch flow paths is connected to the water outlet flow path.

[0023] According to some embodiments of the present invention, the plurality of heat exchange areas include: a first heat exchange area, a second heat exchange area, a third heat exchange area and a fourth heat exchange area, the first heat exchange area and the second heat exchange area are spaced apart in a second direction, the first heat exchange area and the third heat exchange area are spaced apart in a first direction, the fourth heat exchange area and the third heat exchange area are spaced apart in the second direction and the fourth heat exchange area and the second heat exchange area are spaced apart in the first direction, the water inlet is arranged in the first heat exchange area, and the water outlet is arranged in the third heat exchange area.

[0024] According to some embodiments of the present invention, the cross-sectional area of the branch flow path in the first heat exchange area is S1, the cross-sectional area of the branch flow path in the second heat exchange area is S2, the cross-sectional area of the branch flow path in the third heat exchange area is S3, and the cross-sectional area of the branch flow path in the fourth heat exchange area is S4, satisfying: S4 > S2 > S3 > S1.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present invention. Description of the Drawings

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, wherein:

[0027] Figure 1 is a front view of a battery tray according to an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of a battery tray according to an embodiment of the present invention;

[0029] Figure 3 is a front view of a connecting plate according to an embodiment of the present invention;

[0030] Figure 4Schematic diagram of the water outlet flow path, water inlet flow path, and branch flow path and the battery assembly according to an embodiment of the present invention;

[0031] Figure 5 Front view of a heat exchange plate according to an embodiment of the present invention;

[0032] Figure 6 Schematic diagram of a first heat exchange area according to an embodiment of the present invention;

[0033] Figure 7 Schematic diagram of a second heat exchange area according to an embodiment of the present invention;

[0034] Figure 8 Schematic diagram of a third heat exchange area according to an embodiment of the present invention;

[0035] Figure 9 Schematic diagram of a fourth heat exchange area according to an embodiment of the present invention;

[0036] Figure 10 Schematic diagram of a battery pack and a heat exchange plate according to an embodiment of the present invention;

[0037] Figure 11 Bottom view of a battery tray according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] 100, battery tray;

[0040] 1, heat exchange plate; 2, battery pack; 21, frame; 22, connecting plate; 221, main body part; 222, first side plate;

[0041] 223, second side plate; 23, first ear; 24, second ear;

[0042] 11, extension plate; 111, first adapter; 112, second adapter plate; 113, first side; 114, second side; 12, adapter box; 13, body part; 14, first connecting member; 15, second connecting member;

[0043] 10, water inlet; 20, water outlet; 101, flow channel groove;

[0044] 31, first branch flow path; 32, second branch flow path; 33, third branch flow path;

[0045] 41, first water inlet flow path; 42, second water inlet flow path; 43, third water inlet flow path;

[0046] 51, first water outlet flow path; 52, second water outlet flow path; 53, third water outlet flow path; 54, fourth water outlet flow path;

[0047] 60. Battery cell. Detailed implementation

[0048] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0049] In the related art, for the battery assembly of a vehicle, the heat exchange plate plays a crucial role in cooling the battery assembly. In a traditional battery assembly, the water inlet and outlet of the heat exchange plate are generally arranged inside the frame of the battery assembly. When the water inlet and outlet of the heat exchange plate leak, it may cause a short circuit inside the battery assembly and a sharp rise in the temperature of the battery pack, seriously affecting the safety and reliability of the battery assembly during operation. At the same time, it will also shorten the battery performance and life.

[0050] In addition, since the water inlet and outlet of the heat exchange plate are arranged inside the battery assembly, it is difficult to repair the heat exchange plate.

[0051] The following refers to Figures 1 - 11 Describe the battery tray according to the embodiment of the present invention.

[0052] The battery tray 100 according to the present invention includes: a frame 21, a heat exchange plate 1, and an extension plate 11. The frame 21 is arranged in a surrounding manner to define a battery accommodation cavity inside the frame 21; the heat exchange plate 1 is arranged at the bottom of the frame 21 and closes the battery accommodation cavity; the extension plate 11 is connected to the heat exchange plate 1 and protrudes beyond the outer periphery of the frame 21; wherein, a cooling flow channel suitable for heat exchange in the battery accommodation cavity is formed inside the heat exchange plate 1, and a water inlet 10 and a water outlet 20 communicating with the cooling flow channel are formed on the extension plate 11.

[0053] In some specific embodiments, the battery tray 100 is composed of a frame 21, a heat exchange plate 1, and an extension plate 11. A battery accommodation cavity is formed inside the frame 21, and the battery is disposed in the battery accommodation cavity. The frame 21 can provide protection for the battery to prevent the battery from being damaged by external impacts. The frame 21 can also play a positioning role for the battery to ensure the correct installation of the battery. A heat exchange plate 1 is further disposed at the bottom of the frame 21. The heat exchange plate 1 can close the bottom of the battery accommodation cavity. Multiple cooling channels are formed inside the heat exchange plate 1, and the multiple cooling channels are distributed at various positions of the battery accommodation cavity. The coolant flows in the cooling channels, and the coolant can absorb the heat in the battery accommodation cavity, reduce the temperature in the battery accommodation cavity, thereby reducing the temperature of the battery, and avoiding the performance reduction or damage caused by the overheating of the battery. The extension plate 11 is disposed at the outer peripheral edge of the frame 21. The extension plate 11 is connected to the heat exchange plate 1. The extension plate 11 protrudes from the outer periphery of the frame 21 and extends in a direction away from the battery accommodation cavity. An inlet 10 and an outlet 20 are further formed on the extension plate 11. The inlet 10 and the outlet 20 are respectively communicated with the cooling channels. In this application, the inlet 10 and the outlet 20 of the heat exchange plate 1 are disposed outside the frame 21, so that when the inlet 10 or the outlet 20 of the heat exchange plate 1 leaks, the coolant will not flow into the interior of the battery assembly, effectively preventing a short circuit inside the battery assembly, ensuring the safety and reliability during the operation of the battery assembly. At the same time, compared with the traditional battery pack 2 in which the inlet 10 and the outlet 20 of the heat exchange plate 1 are disposed inside the battery, since the inlet 10 and the outlet 20 of the heat exchange plate 1 in this application are disposed outside the frame 21, the inlet 10 and the outlet 20 of the heat exchange plate 1 can be repaired and maintained without disassembling the battery assembly, making the repair and maintenance of the inlet 10 and the outlet 20 of the heat exchange plate 1 more convenient and fast.

[0054] According to the battery tray 100 of the present invention, a battery accommodation cavity is formed inside the frame 21, the heat exchange plate 1 is disposed at the bottom of the frame 21, the extension plate 11 is disposed at the outer peripheral edge of the frame 21, the extension plate 11 is connected to the heat exchange plate 1, the extension plate 11 protrudes from the outer periphery of the frame 21 and extends in a direction away from the battery accommodation cavity, an inlet 10 and an outlet 20 are formed on the extension plate 11, the inlet 10 and the outlet 20 are respectively communicated with the cooling channels, so that the inlet 10 and the outlet 20 of the heat exchange plate 1 are disposed outside the frame 21. When the inlet 10 or the outlet 20 of the heat exchange plate 1 leaks, the coolant will not flow into the interior of the battery assembly, effectively preventing a short circuit inside the battery assembly, ensuring the safety and reliability during the operation of the battery assembly. At the same time, since the inlet 10 and the outlet 20 of the heat exchange plate 1 in this application are disposed outside the frame 21, the inlet 10 and the outlet 20 of the heat exchange plate 1 can be repaired and maintained without disassembling the battery assembly, making the repair and maintenance of the inlet 10 and the outlet 20 of the heat exchange plate 1 more convenient and fast.

[0055] According to some embodiments of the present invention, the opening directions of the water inlet 10 and the water outlet 20 are the same as the extending direction of the heat exchange plate 1.

[0056] In some specific embodiments, the heat exchange plate 1 extends horizontally along the length direction of the frame 21, and the water inlet 10 and the water outlet 20 are respectively open towards the length direction of the battery frame 21, so that the water inlet direction and the water outlet direction of the cooling flow channel are consistent with the extending direction of the heat exchange plate 1 and both are towards the length direction of the frame 21. The battery tray 100 can be directly assembled with the vehicle from the length direction of the frame 21 without adding a water path conversion component to convert the water inlet direction and the water outlet direction of the heat exchange plate 1 from the thickness direction of the frame 21 to the length direction, thereby improving the assembly and disassembly efficiency of the battery tray 100 and the vehicle and reducing the manufacturing cost of the vehicle.

[0057] According to some embodiments of the present invention, the extension plate 11 includes: a body portion 13 and a connection box 12. The body portion 13 is connected to the heat exchange plate 1 and has the same extending direction as the heat exchange plate 1, and the body portion 13 protrudes from the outer periphery of the frame 21. The connection box 12 is disposed on one side of the body portion 13 in the thickness direction. The water inlet 10 and the water outlet 20 are provided on the connection box 12, and a first cavity and a second cavity are formed inside the connection box 12 to communicate the cooling flow channel with the water inlet 10 and the water outlet 20 respectively.

[0058] In some specific embodiments, the extension plate 11 is composed of a main body portion 13 and a connection box 12. The main body portion 13 is disposed at the edge of the outer periphery of the frame 21. One end of the main body portion 13 is connected to the heat exchange plate 1, and the other end of the main body portion 13 protrudes from the outer periphery of the frame 21 and extends in a direction away from the heat exchange plate 1. A connection box 12 is disposed on one side of the main body portion 13 in the thickness direction. The main body portion 13 can be used to support and fix the connection box 12, improving the stability and reliability of the connection box 12 during operation. An inlet 10 and an outlet 20 are formed on one side of the connection box 12 away from the frame 21 in the length direction. A first cavity and a second cavity extending in the thickness direction of the connection box 12 are also formed in the connection box 12. The first cavity communicates the inlet 10 with the cooling channel. When the coolant flowing in the length direction of the frame 21 in the inlet 10 passes through the first cavity, the coolant can be converted to flow in the thickness direction of the frame 21 and then flow into the cooling channel. The second cavity connects the outlet 20 with the cooling channel. When the coolant flowing in the length direction of the frame 21 in the cooling channel passes through the second cavity, the coolant can be converted to flow in the thickness direction of the frame 21 and then flow into the outlet 20. The flow direction of the coolant is converted again to flow in the length direction of the frame 21 when entering the outlet 20. Through the conversion of the first cavity and the second cavity of the battery tray 100 of the present application, the flow direction of the coolant in the cooling channel is the same as the flow direction at the inlets and outlets 20. Thus, the battery tray 100 can be directly assembled with the vehicle in the length direction of the frame 21 without adding a waterway conversion component to convert the inlet direction and the outlet direction of the heat exchange plate 1 from the thickness direction of the frame 21 to the length direction, thereby improving the assembly and disassembly efficiency of the battery tray 100 with the vehicle and reducing the manufacturing cost of the vehicle.

[0059] According to some embodiments of the present invention, the connection box 12 includes: a housing and a baffle. An inlet 10 and an outlet 20 are formed on the side of the housing facing away from the frame 21; the baffle is disposed inside the housing and divides the interior of the housing into a first cavity and a second cavity. The first cavity communicates with the inlet 10 and the cooling channel respectively, and the second cavity communicates with the outlet 20 and the cooling channel respectively.

[0060] In some specific embodiments, the adapter box 12 is composed of a shell and a baffle assembly. The shell is arranged on one side of the main body 13 in the thickness direction. The side wall of the shell on one side in the height direction is fitted with the outer periphery of the frame 21. The shell extends in the thickness direction of the main body 13. A conversion water cavity is formed in the shell. A water inlet 10 and a water outlet 20 are formed on the side of the shell away from the frame 21. A water inlet nozzle and a water outlet nozzle are also arranged on the water inlet 10 and the water outlet 20. The extension direction of the water inlet nozzle and the water outlet nozzle is consistent with the extension direction of the heat exchange plate 1. The water inlet 10 and the water outlet 20 are respectively connected to the conversion water cavity. A partition is arranged in the conversion water cavity. The partition separates the conversion water cavity into a relatively independent first cavity and a second cavity, thereby effectively preventing the mixing of coolants of different temperatures in the first cavity and the second cavity, thereby ensuring the heat exchange effect of the heat exchange plate 1. The first cavity and the second cavity extend along the thickness direction of the adapter box 12 respectively. The first cavity connects the water inlet nozzle and the cooling channel. The water inlet nozzle When the cooling liquid flowing in the extension direction of the heat exchange plate 1 passes through the first cavity, the cooling liquid can be converted to flow along the thickness direction of the adapter box 12 and then flow into the cooling channel. The second cavity connects the water outlet and the cooling channel. When the cooling liquid flowing in the extension direction of the heat exchange plate 1 in the cooling channel passes through the second cavity, the cooling liquid can be converted to flow along the thickness direction of the conversion box and then flow into the water outlet. The flow direction of the cooling liquid is converted again to flow along the extension direction of the heat exchange plate 1 when entering the water outlet. The battery tray 100 of the present application converts the first cavity and the second cavity so that the flow direction of the cooling liquid in the cooling channel is the same as the opening direction of the inlet and outlet nozzles, so that the battery tray 100 can be directly assembled with the vehicle from the length direction of the frame 21, without adding a water channel conversion component to convert the water inlet direction and the water outlet direction of the heat exchange plate 1 from the thickness direction of the frame 21 to the length direction, thereby improving the assembly and disassembly efficiency of the battery tray 100 and the vehicle and reducing the manufacturing cost of the vehicle.

[0061] According to some embodiments of the present invention, a first flow path and a second flow path extending in a horizontal direction are formed in the main body 13, the first flow path connects the first cavity with the cooling flow channel, and the second flow path connects the second cavity with the cooling flow channel; wherein a first guide wall is formed in the first cavity, the first guide wall is formed with a first wall opposite to the first flow path and a second wall opposite to the water inlet 10, and a circular arc transition is formed between the first wall and the second wall; a second guide wall is formed in the second cavity, the second guide wall is formed with a third wall opposite to the second flow path and a fourth wall opposite to the water outlet 20, and a circular arc transition is formed between the third wall and the fourth wall.

[0062] In some specific embodiments, a first flow path and a second flow path are formed in the body portion 13. The first flow path extends in the horizontal direction, and the second flow path extends in the horizontal direction. One end of the first flow path communicates with the first cavity, and the other end of the first flow path communicates with the cooling flow path. One end of the second flow path communicates with the second cavity, and the other end of the second flow path communicates with the cooling flow path. The flow of the coolant between the first cavity and the heat exchange flow path, and between the second cavity and the heat exchange flow path is respectively realized through the first flow path and the second flow path. At least a part of the inner wall of the first cavity forms a first guiding wall. The first guiding wall forms a first wall and a second wall. The first wall faces the first flow path, and the second wall faces the water inlet 10. There is an arc transition between the first wall and the second wall. A second guiding wall is formed in the second cavity body. The second guiding wall forms a third wall and a fourth wall. The third wall faces the second flow path, and the fourth wall faces the water outlet 20. There is an arc transition between the third wall and the fourth wall. The arc transition can reduce the friction between the coolant and the first wall and the second wall, thereby reducing the flow resistance of the coolant and improving the smoothness of the coolant flow. The arc transition can also avoid the pressure loss caused by right-angle or sharp transitions, and ensure the stability and flow rate of the coolant during flow.

[0063] According to some embodiments of the present invention, the heat exchange plate 1 includes: a first heat exchange plate 1 and a second heat exchange plate 1. A flow channel groove 101 is formed in the first heat exchange plate 1. The second heat exchange plate 1 covers the first heat exchange plate 1 and closes the flow channel groove 101 to define a cooling flow channel. The body portion 13 includes: a first adapter 111 plate and a second adapter plate 112. The first adapter 111 plate and the first heat exchange plate 1 are constructed as an integral part, and an adapter groove communicating with the flow channel groove 101 is formed on the first adapter 111 plate. The second adapter plate 112 and the second heat exchange plate 1 are constructed as an integral part and cover the first adapter 111 plate and close the adapter groove to define an adapter flow channel communicating with the cooling flow channel. Wherein, the adapter box 12 is arranged on one side in the thickness direction of the second adapter plate 112, and adapter holes for respectively communicating the adapter flow channel with the first cavity and the second cavity are formed on the second adapter plate 112.

[0064] In some specific embodiments, the heat exchange plate 1 is configured into two, and the two heat exchange plates 1 are respectively a first heat exchange plate 1 and a second heat exchange plate 1. A flow channel groove 101 recessed in a direction away from the second heat exchange plate 1 is provided inside the first heat exchange plate 1. The flow channel groove 101 is configured into multiple ones, and the coolant flows in the flow channel groove 101, so as to realize the cooling of the battery accommodation cavity. The second heat exchange plate 1 covers the first heat exchange plate 1, and the second heat exchange plate 1 can seal the flow channel groove 101 to form a heat exchange flow channel. The second heat exchange plate 1 can effectively prevent the coolant from leaking when flowing in the heat exchange flow channel, ensuring the stability and reliability during the operation of the battery assembly; the body part 13 is composed of a first adapter plate 111 and a second adapter plate 112. The first adapter plate 111 and the first heat exchange plate 1 are configured as an integral part, and the second adapter part and the second heat exchange plate 1 are configured as an integral part. On the one hand, the first adapter plate 111 and the first heat exchange plate 1 can be manufactured by the same mold, and the second adapter plate 112 and the second heat exchange plate 1 can be manufactured by the same mold, reducing the number of parts manufactured and the manufacturing cost. On the other hand, it makes the assembly and disassembly of the first adapter plate 111 and the first heat exchange plate 1, and the second adapter plate 112 and the second heat exchange plate 1 more convenient, reducing the difficulty of cleaning and maintaining the first heat exchange plate 1 and the second heat exchange plate 1. A first adapter groove 111 and a second adapter groove are formed on the first adapter plate 111 and are communicated with the flow channel groove 101. The structures of the first adapter groove 111 and the second adapter groove are different. The first adapter groove 111 is communicated with four flow channel grooves 101, and the second adapter groove is communicated with three flow channel grooves 101. Moreover, the first adapter groove 111 is connected to the water inlet 10, and the second adapter groove is connected to the water outlet 20. This design method has a certain anti-misoperation function, effectively preventing the water inlet nozzle and the water outlet nozzle from being installed reversely. A second heat exchange plate 1 is further covered on the first adapter plate 111. The second heat exchange plate 1 can seal the adapter groove to define an adapter flow channel, and the adapter flow channel is communicated with the heat exchange flow channel. The second heat exchange plate 1 can effectively prevent the coolant from leaking when flowing from the heat exchange flow channel into the adapter flow channel or from the adapter flow channel into the heat exchange flow channel, ensuring the stability and reliability during the operation of the battery assembly. The adapter box 12 is arranged on one side in the thickness direction of the second adapter plate 112. Adapter holes for communicating the adapter flow channel with the first cavity and the second cavity respectively are formed on the second adapter plate 112, so that the first cavity and the second cavity are respectively communicated with the adapter flow channel, thereby realizing the change of the flow direction of the coolant at the water inlet 10 and the water outlet 20.

[0065] According to some embodiments of the present invention, a first connecting member 14 and a second connecting member 15 are formed on the side wall of the frame 21. The body part 13 is between the first connecting member 14 and the second connecting member 15. A first side edge 113 is provided on one side of the body part close to the first connecting member 14, and a second side edge 114 is provided on one side of the body part close to the second connecting member 15. The first side edge 113 and the second side edge 114 extend obliquely towards each other in a direction away from the frame 21.

[0066] In some specific embodiments, on one side wall of the frame 21 in the length direction, a first connecting member 14 and a second connecting member 15 protruding from the outer periphery of the frame 21 are formed. An inner body portion 13 is provided between the first connecting member 14 and the second connecting member 15. A first side, a second side, a third side, a first side edge 113, and a second side edge 114 are formed on the inner body portion 13. The first side is arranged close to the first connecting member 14, the second side is arranged close to the second connecting member 15, the first side and the second side are arranged in parallel, and the first side and the second side are respectively perpendicular to the side wall of the frame 21. The first side edge 113 is connected to the first side, the second side edge 114 is connected to the second side, and the ends of the first side edge 113 and the second side edge 114 away from the first side and the second side are inclined towards each other. There is a certain distance between the first side edge 113 and the first connecting member 14, and there is a certain distance between the second side edge 114 and the first connecting member 14, so that the extension plate 11 will not interfere with the first connecting member 14 and the second connecting member, ensuring the stability and reliability of the battery assembly during operation. In addition, some other components are also provided on the inner body portion 13, and there is also a certain gap between the other components provided on the inner body portion 13 and the first connecting member 14 and the second connecting member. The other components provided on the inner body portion 13 will not interfere with the first connecting member 14 and the second connecting member, further improving the stability and reliability of the battery assembly during operation. The third side connects the ends of the first side edge 113 and the second side edge 114 away from the first side and the second side, and the third side is parallel to one side wall of the frame 21 in the length direction.

[0067] According to some embodiments of the present invention, on both sides of the housing in the width direction, a first ear 23 and a second ear 24 are respectively provided. The first ear 23 and the second ear 24 are respectively fixedly connected to the inner body portion 13. On the one hand, the first ear 23 and the second ear 24 respectively play a role in fixing and supporting the adapter box 12, enhancing the strength of the connection structure between the inner body portion 13 and the housing, improving the stability and reliability of the connection between the housing and the inner body portion 13, avoiding loosening or falling of the adapter box 12 during the use of the battery tray 100, and improving the stability and reliability of the battery tray 100 during use. On the other hand, the first ear 23 and the second ear 24 can also play a role in protecting the internal structure of the adapter box 12, preventing internal damage to the adapter box 12 when it is subjected to external impacts.

[0068] According to some embodiments of the present invention, the battery tray 100 further includes: a connecting plate 22, and the connecting plate 22 is arranged on one side of the extension plate 11 in the thickness direction and connects the extension plate 11 and the frame 21.

[0069] In some specific embodiments, a connecting plate 22 is further provided on the battery tray 100, one end of the connecting plate 22 is connected to the frame 21, the other end of the connecting plate 22 protrudes from the outer periphery of the frame 21, and the other end of the connecting plate 22 is fitted with one side of the extension plate 11 in the thickness direction. The connecting plate 22 connects the extension plate 11 to the frame 21, thereby increasing the contact area between the frame 21 and the extension plate 11, and improving the stability and reliability of the connection between the frame 21 and the extension plate 11. At the same time, the connecting plate 22 can also improve the structural strength of the extension plate 11 to a certain extent, and enhance the stability and reliability of the battery assembly when docking with the vehicle.

[0070] According to some embodiments of the present invention, the connecting plate 22 includes: a main body 221, a first side plate 222 and a second side plate 223, the main body 221 is arranged on one side of the extension plate 11 in the thickness direction and is fixed to the extension plate 11; the first side plate 222 and the second side plate 223 are arranged on both sides of the main body 221 in the width direction and extend to the frame 21 respectively, and the first side plate 222 and the second side plate 223 are respectively opposite to and connected to the end faces of the frame 21 in the thickness direction.

[0071] In some specific embodiments, the connecting plate 22 is mainly composed of a main body 221, a first side plate 222 and a second side plate 223. The main body 221 is in the same shape as the main body 13 of the extension plate 11. The main body 221 fits one side of the main body 13 in the thickness direction and is connected by fasteners, which enhances the structural strength and rigidity of the main body 13 of the extension plate 11 and improves the stability and reliability of the extension plate 11 when docking with the vehicle. The main body 221 is provided with a first side plate 222 at one end in the width direction, and a second side plate 223 at the other end in the width direction. The side plate 223, the first side plate 222 and the second side plate 223 extend along the width direction of the frame 21 in directions away from each other, and the first side plate 222 and the second side plate 223 are respectively opposite to and connected to the end faces of the frame 21 in the thickness direction, thereby realizing the connection between the connecting plate 22 and the frame 21. The connecting plate 22 connects the extension plate 11 to the frame 21 through the main body 221, the first side plate 222 and the second side plate 223, thereby further increasing the contact area between the frame 21 and the extension plate 11, and improving the stability and reliability of the connection between the frame 21 and the extension plate 11.

[0072] The battery pack according to the present invention will be briefly described below.

[0073] The battery assembly according to the present invention is provided with the battery tray 100 of any one of the above embodiments. Since the battery assembly according to the present invention is provided with the battery tray 100 of any one of the above embodiments, the battery assembly is further provided with a battery pack 2. The battery pack 2 is configured to include a plurality of battery cells 60 arranged in sequence in a first direction, and each battery pack 2 is provided with a plurality of battery cells 60 arranged in sequence in a second direction. The battery pack 2 is received in the battery receiving cavity. Therefore, in the battery assembly according to the present application, by arranging the water inlet 10 and the water outlet 20 of the heat exchange plate 1 outside the frame 21, and the opening directions of the water inlet 10 and the water outlet 20 are consistent with the extending direction of the heat exchange plate 1, the battery assembly can be directly assembled with the vehicle in the y direction without adding a water path conversion component, making the assembly and disassembly efficiency of the battery assembly and the electrical equipment higher. In addition, since the water inlet 10 and the water outlet 20 of the heat exchange plate 1 are arranged outside the battery assembly, the maintenance of the battery assembly is more convenient. At the same time, when the water inlet and the water outlet leak, it will not affect the inside of the battery assembly, improving the safety and reliability of the battery assembly during operation.

[0074] In some specific embodiments, the first direction may be configured as the length direction of the battery assembly, the second direction may be configured as the width direction of the battery assembly, and the third direction may be configured as the height direction of the battery assembly. A plurality of battery cells 60 are arranged in sequence in the second direction to form the battery pack 2. The battery assembly includes a plurality of battery packs 2, and the plurality of battery packs 2 are arranged in sequence in the second direction. The battery assembly further includes a heat exchange plate 1. The heat exchange plate 1 is arranged on one side of the plurality of battery packs 2 in the third direction, and the plurality of battery cells 60 respectively abut against the heat exchange plate 1 so that the heat exchange plate 1 can heat or cool the plurality of battery cells 60. A plurality of heat exchange zones are formed in the heat exchange plate 1. One heat exchange zone corresponds to a plurality of battery packs 2. A plurality of branch flow paths are formed in each heat exchange zone. One battery pack 2 corresponds to a plurality of branch flow paths. An inlet water flow path and an outlet water flow path are formed in the heat exchange plate 1. The heat exchange plate 1 is further provided with a water inlet 10 and a water outlet 20. One end of the inlet water flow path is communicated with the water inlet 10 and the other end is communicated with the upstream end of the branch flow path. One end of the outlet water flow path is communicated with the water outlet 20 and the other end is communicated with the downstream end of the branch flow path.

[0075] It can be understood that the coolant flows out from the water outlet 20 after passing through the water inlet 10, the water inlet flow path, the branch flow paths and the water outlet flow path in sequence. During the flow process, the coolant exchanges heat with multiple battery cells 60. One heat exchange area corresponds to multiple battery packs 2, and one battery pack 2 corresponds to multiple branch flow paths. The coolant flowing in the multiple branch flow paths can all exchange heat with the battery pack 2, improving the heat exchange effect of the battery pack 2. It is worth mentioning that when the battery pack 2 is working, the working temperature of the battery pack 2 will affect the working efficiency of the battery pack 2. Therefore, through the above settings, the temperature during the operation of the battery pack 2 can be made more stable, making the working efficiency of the battery pack 2 more stable, thereby improving the working stability of the battery assembly.

[0076] According to some embodiments of the present invention, the heat exchange plate 1 is provided with a water inlet 10 and a water outlet 20, a water inlet flow path connected to the water inlet 10, and a water outlet flow path communicated with the water outlet 20. The heat exchange plate 1 is provided with a heat exchange area corresponding to multiple battery packs 2, and multiple branch flow paths corresponding to each battery pack 2 are arranged in the heat exchange area. The upstream end of the branch flow path is communicated with the water inlet flow path, and the downstream end of the branch flow path is communicated with the water outlet flow path.

[0077] According to some embodiments of the present invention, in one heat exchange area, multiple branch flow paths extend along the second direction and are spaced apart in the first direction. 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. The first flow direction is opposite to the second flow direction.

[0078] In some specific embodiments, the branch flow paths extend in the second direction, and multiple branch flow paths are spaced apart in the first direction. It can be understood that the coolant enters from the water inlet 10 and flows through the water inlet flow path, the branch flow paths and the water outlet flow path in sequence and then is discharged from the water outlet 20. During the flow process, the coolant exchanges heat with the battery pack 2. Therefore, as the coolant flows, the heat loss of the coolant gradually increases. The increase in the heat loss of the coolant will reduce the heat exchange effect on the battery cell 60. By making the coolant flow along the first flow direction in some branch flow paths and making the coolant flow along the second flow direction in some branch flow paths, and at the same time the first flow direction is opposite to the second flow direction, it is possible to avoid the phenomenon that some battery cells 60 have a good heat exchange effect and some battery cells 60 have a poor heat exchange effect in the heat exchange area, making the heat exchange of the heat exchange plate 1 for multiple battery cells 60 in the heat exchange area more balanced.

[0079] In one heat exchange area, at least some adjacent branch flow paths have opposite flow directions and are communicated with each other. Therefore, through the above settings, it is possible to make the coolant continuously flow in the heat exchange area, avoid the coolant directly entering the water outlet flow path after passing through one branch flow path, extend the residence time of the coolant in the heat exchange area, and improve the utilization rate of the coolant.

[0080] According to some embodiments of the present invention, the number of branch flow paths along the first flow direction is i1, and the number of branch flow paths along the second flow direction is i2, satisfying: 0.3 ≤ i1 / i2 ≤ 1.

[0081] In some specific embodiments, the flow directions of at least some adjacent branch flow paths are the same, and the flow directions of at least some adjacent branch flow paths are opposite. For example, among the four branch flow paths arranged in sequence in the first direction, the branch flow paths located on both sides in the first direction are respectively configured as the first flow channel and the second flow channel, and the two branch flow paths located between the first flow channel and the second flow channel are respectively configured as the third flow channel. The flow direction of the coolant in the two third flow channels is the first flow direction, and the flow direction of the coolant in the first flow channel and the second flow channel is the second flow direction. One end on the same side of the two third flow channels is connected to the first flow channel, and the other end on the same side of the two third flow channels is connected to the second flow channel. It only needs to satisfy: 0.3 ≤ i1 / i2 ≤ 1, and there is no limitation here. Thus, through the above settings, multiple branch flow paths can be connected in series and / or in parallel with each other, extending the residence time of the coolant in the heat exchange area and improving the heat exchange effect of the coolant on the battery pack 2. At the same time, it can be understood that if the coolant flows along the first flow direction or the second flow direction, the heat exchange effect of the coolant will gradually decrease in the flow direction of the coolant, resulting in a phenomenon that in a battery pack 2, the heat exchange effect of some battery monomers 60 is good and the heat exchange effect of some battery monomers 60 is poor. Therefore, by making the coolant flow along the first flow direction and the second flow direction respectively in multiple branch flow paths, more balanced heat exchange of multiple battery monomers 60 of the battery pack 2 can be achieved, thereby improving the heat exchange effect of the battery pack 2, making the temperature more stable when the battery pack 22 works, and thus making the working efficiency of the battery pack 2 more stable, and further improving the working stability of the battery assembly.

[0082] According to some embodiments of the present invention, the multiple branch flow paths include: a first branch flow path 31, a second branch flow path 32, and a third branch flow path 33. The first branch flow path 31 and the second branch flow path 32 are respectively arranged on both sides of the heat exchange area in the first direction; the third branch flow path 33 is configured to be multiple and connected to each other, and the multiple branch flow paths are arranged between the first branch flow path 31 and the second branch flow path 32; wherein the first branch flow path 31 and the second branch flow path 32 are connected through the multiple third branch flow paths 33; in at least one heat exchange area, the first branch flow path 31 is connected to the water inlet flow path, and the second branch flow path 32 is connected to the water outlet flow path, and / or in at least one heat exchange area, the first branch flow path 31 and the second branch flow path 32 are respectively connected to the water inlet flow path, and at least one third branch flow path 33 is connected to the water outlet flow path.

[0083] In some specific embodiments, in multiple heat exchange zones, one end of the first branch flow path 31 and one end of the second branch flow path 32 in at least one heat exchange zone are communicated with the water inlet flow path, the other end of the first branch flow path 31 and the other end of the second branch flow path 32 are respectively communicated with at least one third branch flow path 33. Among the multiple third branch flow paths 33, the third branch flow path 33 communicated with the first branch flow path 31 and the third branch flow path 33 communicated with the second branch flow path 32 are respectively communicated with the water outlet flow path. Of course, it is also possible that one end of one of the multiple third branch flow paths 33 is respectively communicated with the first branch flow path 31 and the second branch flow path 32, and the other end of the third branch flow path 33 is communicated with the water outlet flow path, and there is no limitation here.

[0084] In one heat exchange zone, the part of the battery pack 2 close to the outer periphery of the heat exchange zone is configured as an edge part. Since the edge part has a relatively large contact area with the external environment, when the heat exchange plate 1 heats the multiple battery packs 2, the heat loss of the edge part is relatively large, resulting in a relatively low heating efficiency of the heat exchange plate 1 for the battery pack 2. When the heat exchange plate 1 is suitable for heating the battery pack 2, the coolant starts to heat the multiple battery modules corresponding to the heat exchange zone from the first branch flow path 31 and the second branch flow path 32. The first branch flow path 31 and the second branch flow path 32 respectively correspond to the edge part, and since the heat loss of the coolant flowing in the first branch flow path 31 and the second branch flow path 32 is relatively small, thus, the heating effect of the first branch flow path 31 and the second branch flow path 32 on the edge part is relatively good. Therefore, through the above arrangement, the heating effect on the edge part can be improved to eliminate the heat loss of the edge part, so that the heating of the battery pack 2 corresponding to the heat exchange zone by the coolant is more balanced, the heating effect of the battery pack 2 corresponding to the heat exchange zone is improved, and the cold start ability of the battery module is improved.

[0085] In some other specific embodiments, in multiple heat exchange zones, the first branch flow path 31 in at least one heat exchange zone is communicated with the water inlet flow path and the second branch flow path 32 is communicated with the water outlet flow path. Thus, after the coolant enters the heat exchange zone from the water inlet flow path, the coolant sequentially passes through the first branch flow path 31, the third branch flow path 33 and the second branch flow path 32 and then enters the water outlet flow path. The coolant flow path is simple, which simplifies the arrangement of the first branch flow path 31, the second branch flow path 32 and the third branch flow path 33 in the heat exchange zone, improves the production efficiency of the heat exchange plate 1, and at the same time, prolongs the residence time of the coolant in the heat exchange zone and improves the utilization rate of the coolant.

[0086] It is worth mentioning that the first branch flow paths 31 can be constructed as multiple ones connected in parallel with each other. For example, the first branch flow paths 31 are constructed as two. One ends of the two first branch flow paths 31 on the same side are respectively connected to one end of the third branch flow path 33, and the other ends of the two first branch flow paths 31 on the same side are respectively connected to the water inlet flow path. Similarly, the second branch flow paths 32 can be constructed as multiple ones connected in parallel with each other. For example, the second branch flow paths 32 are constructed as two. One ends of the two second branch flow paths 32 on the same side are respectively connected to one end of the third branch flow path 33, and the other ends of the two second branch flow paths 32 on the same side are respectively connected to the water outlet flow path.

[0087] According to some embodiments of the present invention, the multiple heat exchange areas include: a first heat exchange area, a second heat exchange area, a third heat exchange area, and a fourth heat exchange area. The first heat exchange area and the second heat exchange area are spaced apart in the second direction. The first heat exchange area and the third heat exchange area are spaced apart in the first direction. The fourth heat exchange area and the third heat exchange area are spaced apart in the second direction and the fourth heat exchange area and the second heat exchange area are spaced apart in the first direction. The water inlet 10 is arranged in the first heat exchange area, and the water outlet 20 is arranged in the third heat exchange area.

[0088] It can be understood that the first heat exchange area, the second heat exchange area, the third heat exchange area, and the fourth heat exchange area are arranged in a "field" shape on the heat exchange plate 1. The multiple heat exchange areas are compact and regular in layout, improving the utilization rate of the heat exchange plate 1. At the same time, the manufacturing process of the heat exchange plate 1 is simplified, and the production efficiency of the heat exchange plate 1 is improved.

[0089] In some specific embodiments, the water inlet 10 is arranged in the first heat exchange area and the water outlet 20 is arranged in the third heat exchange area. Thus, the coolant can enter the water inlet flow path from the water inlet 10, exchange heat with the first heat exchange area, and then flow back to the third heat exchange area through the water outlet flow path and finally be discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area and the third heat exchange area. It can be that the coolant enters the second heat exchange area through the water inlet flow path, and after the coolant exchanges heat with the second heat exchange area, it flows back to the third heat exchange area through the water outlet flow path and finally is discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area, the second heat exchange area, and the third heat exchange area. It can also be that the coolant enters the third heat exchange area through the water inlet flow path, and after the coolant exchanges heat with the third heat exchange area, it is discharged through the water outlet flow path and the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area and the third heat exchange area. It can further be that the coolant enters the fourth heat exchange area through the water inlet flow path, and after the coolant exchanges heat with the fourth heat exchange area, it flows back to the third heat exchange area through the water outlet flow path and finally is discharged from the water outlet 20. At this time, the coolant can exchange heat with the first heat exchange area, the fourth heat exchange area, and the third heat exchange area. Thus, through the above settings, the residence time of the coolant in the heat exchange area can be extended, and the utilization rate of the coolant is improved.

[0090] The inlet water flow path includes: a first inlet water flow path 41, a second inlet water flow path 42, and a third inlet water flow path 43. One end of the first inlet water flow path 41 is communicated with the water inlet 10. At least part of the first inlet water flow path 41 is arranged on the outer periphery of the first heat exchange area. The other end of the first inlet water flow path 41 is communicated with a first branch flow path 31 and a second branch flow path 32 of the second heat exchange area. Thus, the coolant enters the second heat exchange area after flowing through the outer periphery of the first heat exchange area, and in the first direction, the coolant exchanges heat with the second heat exchange area starting from both sides of the second heat exchange area. It can be understood that as the coolant flows, the heat loss of the coolant gradually increases. Thus, the heat loss of the coolant is small when flowing in the first branch flow path 31 and the second branch flow path 32 of the second heat exchange area. At this time, the heating effect of the coolant on the edge part is good. Thus, through the above settings, the heating effect of the edge part of the battery pack 22 corresponding to the second heat exchange area can be improved, and the cold start ability of the battery assembly is improved.

[0091] The outlet water flow path includes: a first outlet water flow path 51, a second outlet water flow path 52, a third outlet water flow path 53, and a fourth outlet water flow path 54. One end of the first outlet water flow path 51 is communicated with at least one third branch flow path 33 of the second heat exchange area. The other end of the first outlet water flow path 51 sequentially flows through the outer peripheries of the fourth heat exchange area and the third heat exchange area and is communicated with the outlet pipe 20. Thus, the coolant enters the first outlet water flow path 51 after flowing through the second heat exchange area. When the coolant flows in the first outlet water flow path 51, it can exchange heat with the edge parts of the fourth heat exchange area and the third heat exchange area, improving the utilization rate of the coolant. At the same time, it can be understood that the first outlet water flow path 51 collects the coolant in multiple branch flow paths in the second heat exchange area. Thus, the flow rate of the coolant in the first outlet water flow path 51 is greater than the flow rate of the coolant in the branch flow paths in the second heat exchange area. When the coolant flows in the first outlet water flow path 51 and exchanges heat with the edge parts of the fourth heat exchange area and the third heat exchange area, the large flow rate of the coolant in the first outlet water flow path 51 can improve the heating effect on the edge parts of the fourth heat exchange area and the third heat exchange area, making the heating of the heat exchange plate 1 on multiple battery packs 2 more balanced, and improving the cold start ability of the battery assembly.

[0092] According to some embodiments of the present invention, the cross-sectional area of the branch flow path in the first heat exchange area is S1, the cross-sectional area of the branch flow path in the second heat exchange area is S2, the cross-sectional area of the branch flow path in the third heat exchange area is S3, and the cross-sectional area of the branch flow path in the fourth heat exchange area is S4, satisfying: S4 > S2 > S3 > S1. It can be understood that the flow resistance of the coolant in the branch flow path can be controlled by setting a baffle or the like in the branch flow path, or the flow resistance of the coolant in the branch flow path can be controlled by controlling the cross-sectional area of the branch flow path, which is not limited here. Thus, by making S4 > S2 > S3 > S1, R1 > R3 > R2 > R4 can be achieved, thereby achieving Q4 > Q2 > Q3 > Q1.

[0093] The electrical equipment according to the present invention will be briefly described below.

[0094] The electrical equipment according to the present invention is provided with the battery assembly of the above embodiment. Since the electrical equipment according to the present invention is provided with the battery assembly described in any one of the above embodiments, the working stability of the electrical equipment is high; wherein the above electrical equipment can be configured as a vehicle.

[0095] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", 5 "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0096] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0097] In the description of the present invention, the meaning of "a plurality" is two or more.

[0098] In the description of the present invention, that the first feature is "above" or "below" the second feature may include direct contact between the first and second features, or may include that the first and second features are not in direct contact but are in contact through additional features therebetween.

[0099] In the description of the present invention, that the first feature is "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0100] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0101] Although embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery tray, characterized in that, include: A frame, the frame being arranged around to define a battery receiving cavity inside the frame; A heat exchange plate, which is disposed at the bottom of the frame and seals the battery cavity; An extension plate, the extension plate is connected to the heat exchange plate and has an outer periphery protruding from the frame; A cooling channel suitable for exchanging heat in the battery accommodating cavity is formed in the heat exchange plate, and a water inlet and a water outlet connected with the cooling channel are formed on the extension plate.

2. The battery tray according to claim 1, wherein The opening direction of the water inlet and the water outlet is the same as the extending direction of the heat exchange plate.

3. The battery tray according to claim 2, wherein, The extension plate comprises: A main body portion, the main body portion is connected to the heat exchange plate and has the same extension direction as the heat exchange plate, and the main body portion protrudes from the outer periphery of the frame; An adapter box is arranged on one side of the main body in the thickness direction, the water inlet and the water outlet are arranged on the adapter box, and a first cavity and a second cavity are formed inside the adapter box to connect the cooling channel with the water inlet and the water outlet respectively.

4. The battery tray according to claim 3, characterized in that, The adapter box comprises: A shell, wherein the water inlet and the water outlet are formed on a side of the shell facing away from the frame; The baffle is arranged in the shell and divides the interior of the shell into a first cavity and a second cavity, the first cavity is communicated with the water inlet and the cooling channel respectively, and the second cavity is communicated with the water outlet and the cooling channel respectively.

5. The battery tray according to claim 4, wherein The main body has a first flow path and a second flow path extending in a horizontal direction, wherein the first flow path connects the first cavity with the cooling channel, and the second flow path connects the second cavity with the cooling channel; A first flow guide wall is formed in the first cavity, the first flow guide wall includes a first wall facing the first flow path and a second wall facing the water inlet, and a circular arc transition is formed between the first wall and the second wall; A second flow guide wall is formed in the second cavity, and the second flow guide wall is formed with a third wall directly facing the second flow path and a fourth wall directly facing the water outlet, and an arc transition is formed between the third wall and the fourth wall.

6. The battery tray according to claim 3, characterized in that, The heat exchange plate comprises: A first heat exchange plate and a second heat exchange plate, wherein a flow channel is formed in the first heat exchange plate, and the second heat exchange plate covers the first heat exchange plate and closes the flow channel to define the cooling flow channel; The main body comprises: a first adapter plate and a second adapter plate, wherein the first adapter plate and the first heat exchange plate are constructed as an integral part and a transfer groove communicating with the flow channel groove is formed on the first adapter plate, and the second adapter plate and the second heat exchange plate are constructed as an integral part and cover the first adapter plate and close the transfer groove to define a transfer flow channel communicating with the cooling flow channel; wherein The adapter box is arranged on one side of the second adapter plate in the thickness direction, and the second adapter plate is formed with adapter holes for connecting the adapter channel with the first cavity and the second cavity respectively.

7. The battery tray according to claim 3, wherein, On the side wall of the frame, a first connecting member and a second connecting member are formed. The body portion is located between the first connecting member and the second connecting member. On one side of the body portion close to the first connecting member, a first side edge is provided, and on the other side of the body portion close to the second connecting member, a second side edge is provided. The first side edge and the second side edge extend obliquely towards each other in a direction away from the frame.

8. The battery tray according to claim 4, characterized in that, On both sides of the housing in the width direction, a first ear and a second ear are respectively provided, and the first ear and the second ear are fixedly connected to the body portion respectively.

9. The battery tray according to claim 1, characterized in that, Further comprising: A connecting plate, which is arranged on one side of the extension plate in the thickness direction and connects the extension plate to the frame.

10. The battery tray according to claim 9, characterized in that, The connecting plate includes: A main body portion, which is arranged on one side of the extension plate in the thickness direction and is fixed to the extension plate; A first side plate and a second side plate, which are arranged on both sides of the main body portion in the width direction and respectively extend to the frame. The first side plate and the second side plate are respectively opposite to and connected to the end faces of the frame in the thickness direction.

11. A battery assembly, characterized in that, Comprising: A battery pack, which is configured to be a plurality of battery packs arranged in sequence in a first direction, and each battery pack is provided with a plurality of battery cells arranged in sequence in a second direction; A battery tray, which is configured to be the battery tray according to any one of claims 1-10, and the battery pack is received in the battery receiving cavity.

12. The battery assembly according to claim 11, characterized in that, The heat exchange plate is provided with a water inlet, a water outlet, an inlet water flow path connected to the water inlet, and an outlet water flow path communicated with the water outlet. The heat exchange plate is provided with heat exchange areas corresponding to a plurality of the battery packs. A plurality of branch flow paths corresponding to each battery pack are arranged in the heat exchange areas. The upstream end of the branch flow path is communicated with the inlet water flow path, and the downstream end of the branch flow path is communicated with the outlet water flow path.

13. The battery assembly according to claim 12, wherein In one of the heat exchange areas, a plurality of the branch flow paths respectively extend along the second direction and are spaced apart in the first direction. The coolant in at least one of the branch flow paths 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.

14. The battery assembly according to claim 12, wherein 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.

15. The battery assembly according to claim 12, characterized in that, A plurality of the branch flow paths include: A first branch flow path and a second branch flow path, which are respectively arranged on both sides of the heat exchange area in the first direction; A third branch flow path, which is configured to be a plurality of mutually connected ones, and a plurality of the branch flow paths are arranged between the first branch flow path and the second branch flow path; wherein The first branch flow path and the second branch flow path are connected through a plurality of the third branch flow paths; wherein In at least one heat exchange area, the first branch flow path is communicated with the inlet water flow path, the second branch flow path is communicated with the outlet water flow path, and / or The first branch flow path and the second branch flow path of at least one heat exchange area are respectively communicated with the water inlet flow path, and at least one of the third branch flow paths is communicated with the water outlet flow path.

16. The battery assembly according to claim 15, wherein The multiple heat exchange areas include: a first heat exchange area, a second heat exchange area, a third heat exchange area, and a fourth heat exchange area. The first heat exchange area and the second heat exchange area are spaced apart in a second direction. The first heat exchange area and the third heat exchange area are spaced apart in a first direction. The fourth heat exchange area and the third heat exchange area are spaced apart in the second direction and the fourth heat exchange area and the second heat exchange area are spaced apart in the first direction. The water inlet is arranged in the first heat exchange area, and the water outlet is arranged in the third heat exchange area.

17. The battery assembly according to claim 16, wherein, The cross-sectional area of the branch flow path in the first heat exchange area is S1, the cross-sectional area of the branch flow path in the second heat exchange area is S2, the cross-sectional area of the branch flow path in the third heat exchange area is S3, and the cross-sectional area of the branch flow path in the fourth heat exchange area is S4, satisfying: S4 > S2 > S3 > S1.

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