Battery tray and battery assembly

Abstract

A battery tray (100) and a battery assembly. The battery tray (100) comprises: a frame (21), the frame (21) being arranged in a surrounding manner to define a battery accommodating cavity inside the frame (21); a heat exchange plate (1), the heat exchange plate (1) being arranged at the bottom of the frame (21) and closing the battery accommodating cavity; and an extension plate (11), the extension plate (11) being connected to the heat exchange plate (1) and protruding beyond the outer periphery of the frame (21), wherein a cooling flow channel adapted to exchange heat from the battery accommodating cavity is formed inside the heat exchange plate (1), and a water inlet (10) and a water outlet (20) being in communication with the cooling flow channel are formed on the extension plate (11).

Description

Battery trays and battery components

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application is based on the Chinese patent application with application number 202311869949.0 and application date December 29, 2023, and claims the priority of the above-mentioned Chinese patent application. The entire content of the above-mentioned Chinese patent application is hereby introduced into this application as a reference. Technical Field

[0003] The present application relates to but is not limited to the field of battery technology, and in particular to a battery tray and a battery assembly. Background Art

[0004] In the related art, for the battery assembly of a vehicle, the heat exchange plate plays a vital 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, and also shortening the battery performance and life.

[0005] In addition, since the water inlet and outlet of the heat exchange plate are arranged inside the battery assembly, the maintenance of the heat exchange plate is relatively difficult. Summary of the Invention

[0006] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0007] One purpose of the present application is to propose a battery tray that effectively prevents short circuits from occurring inside the battery assembly, thereby ensuring the safety and reliability of the battery assembly during operation, while also reducing the difficulty of maintaining the water inlet and outlet of the heat exchange plate.

[0008] Another object of the present application is to provide a battery assembly.

[0009] The battery tray according to the present application includes: a frame, which is arranged in a surrounding manner to define a battery accommodating cavity inside the frame; a heat exchange plate, which is arranged at the bottom of the frame and closes the battery accommodating 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 accommodating cavity is formed in the heat exchange plate, and a water inlet and a water outlet connected to the cooling flow channel are formed on the extension plate.

[0010] According to the battery tray of the present application, a battery accommodating cavity is formed in the frame, the heat exchange plate is arranged at the bottom of the frame, and the extension plate is arranged at the outer edge of the frame. The extension plate is connected to the heat exchange plate, and the extension plate protrudes from the outer periphery of the frame and extends in a direction away from the battery accommodating cavity. A water inlet and a water outlet are formed on the extension plate, and the water inlet and the water outlet are respectively connected to the cooling flow channel, so that the water inlet and the water outlet of the heat exchange plate are arranged outside the frame. When the water inlet or the water outlet of the heat exchange plate leaks, the coolant will not flow into 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 arranges the water inlet and the water outlet of the heat exchange plate outside the frame, the water inlet and the water outlet of the heat exchange plate can be repaired and maintained without disassembling the battery assembly, making the repair and maintenance of the water inlet and the water outlet of the heat exchange plate more convenient and quick.

[0011] The battery assembly according to the present application includes: a battery pack, which is constructed as a plurality of battery cells 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 constructed as the above-mentioned battery tray, and the battery pack is accommodated in a battery accommodating cavity.

[0012] According to the battery assembly of the present application, the above-mentioned battery tray is provided, and a battery pack is also provided in the battery assembly. The battery pack is constructed as a plurality of battery cells 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. The battery pack is accommodated in a battery accommodating cavity. Therefore, according to the battery assembly of the present application, by arranging the water inlet and outlet of the heat exchange plate outside the frame, the battery assembly can be directly assembled with the vehicle in the y direction without adding a water channel conversion assembly, so that the assembly and disassembly efficiency of the battery assembly and the electrical equipment is higher. In addition, since the water inlet and 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 outlet leak, it will not affect the inside of the battery assembly, thereby improving the safety and reliability of the battery assembly during operation.

[0013] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application.

[0014] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] FIG1 is a front view of a battery tray according to one embodiment of the present application;

[0016] FIG2 is a cross-sectional view of a battery tray according to one embodiment of the present application;

[0017] FIG3 is a front view of a connection plate according to one embodiment of the present application;

[0018] FIG4 is a schematic diagram of a water outlet flow path, a water inlet flow path, a branch flow path, and a battery assembly according to one embodiment of the present application;

[0019] FIG5 is a front view of a heat exchange plate according to one embodiment of the present application;

[0020] FIG6 is a schematic diagram of a first heat exchange zone according to one embodiment of the present application;

[0021] FIG7 is a schematic diagram of a second heat exchange zone according to one embodiment of the present application;

[0022] FIG8 is a schematic diagram of a third heat exchange zone according to one embodiment of the present application;

[0023] FIG9 is a schematic diagram of a fourth heat exchange zone according to one embodiment of the present application;

[0024] FIG10 is a schematic diagram of a battery pack and a heat exchange plate according to one embodiment of the present application;

[0025] FIG. 11 is a bottom view of a battery tray according to one embodiment of the present application. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0027] In the related art, for the battery assembly of a vehicle, the heat exchange plate plays a vital 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, and also shortening the battery performance and life.

[0028] In addition, since the water inlet and outlet of the heat exchange plate are arranged inside the battery assembly, the maintenance of the heat exchange plate is relatively difficult.

[0029] The battery tray according to an embodiment of the present application is described below with reference to FIG. 1 to FIG. 11 .

[0030] According to the present application, the battery tray 100 includes: a frame 21, a heat exchange plate 1 and an extension plate 11. The frame 21 is arranged around to define a battery accommodating cavity inside the frame 21; the heat exchange plate 1 is arranged at the bottom of the frame 21 and closes the battery accommodating cavity; the extension plate 11 is connected to the heat exchange plate 1 and has an outer periphery protruding from the frame 21; wherein, a cooling flow channel suitable for heat exchange in the battery accommodating cavity is formed in the heat exchange plate 1, and a water inlet 10 and a water outlet 20 connected to the cooling flow channel are formed on the extension plate 11.

[0031] 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 accommodating cavity is formed inside the frame 21, and the battery is arranged in the battery accommodating cavity. The frame 21 can provide protection for the battery to prevent the battery from being damaged by external impact. The frame 21 can also position the battery to ensure the correct installation of the battery. A heat exchange plate 1 is also provided at the bottom of the frame 21. The heat exchange plate 1 can close the bottom of the battery accommodating cavity. A plurality of cooling channels are formed in the heat exchange plate 1. The plurality of cooling channels are distributed at various positions of the battery accommodating cavity. The coolant flows in the cooling channel. The coolant can absorb the heat in the battery accommodating cavity and reduce the temperature in the battery accommodating cavity, thereby reducing the temperature of the battery and avoiding performance degradation or damage caused by overheating of the battery. The extension plate 11 is provided at the outer edge of the frame 21. The extension plate 11 is connected to the heat exchange plate 1, and the extension plate 11 protrudes from the outside of the frame 21. The water inlet 10 and the water outlet 20 are respectively connected to the cooling channel. In the present application, the water inlet 10 and the water outlet 20 of the heat exchange plate 1 are arranged on the outside of the frame 21, so that when the water inlet 10 or the water outlet 20 of the heat exchange plate 1 leaks, the coolant will not flow into 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, compared with the traditional battery pack 2 that arranges the water inlet 10 and the water outlet 20 of the heat exchange plate 1 inside the battery, since the water inlet 10 and the water outlet 20 of the heat exchange plate 1 are arranged outside the frame 21, the water inlet 10 and the water 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 water inlet 10 and the water outlet 20 of the heat exchange plate 1 more convenient and quick.

[0032] According to the battery tray 100 of the present application, a battery accommodating cavity is formed in the frame 21, the heat exchange plate 1 is arranged at the bottom of the frame 21, the extension plate 11 is arranged at the outer 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 accommodating cavity, and a water inlet 10 and a water outlet 20 are formed on the extension plate 11. The water inlet 10 and the water outlet 20 are respectively connected to the cooling flow channel, so that the water inlet 10 and the water outlet 20 of the heat exchange plate 1 are arranged on the frame 21. On the outside of the frame 21, when the water inlet 10 or the water outlet 20 of the heat exchange plate 1 leaks, the coolant will not flow into 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 water inlet 10 and the water outlet 20 of the heat exchange plate 1 are arranged on the outside of the frame 21 in the present application, the water inlet 10 and the water 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 water inlet 10 and the water outlet 20 of the heat exchange plate 1 more convenient and quick.

[0033] According to some embodiments of the present application, the opening direction of the water inlet 10 and the water outlet 20 is the same as the extending direction of the heat exchange plate 1 .

[0034] 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 toward the length direction of the battery frame 21, so that the water inlet direction and the water outlet direction of the cooling channel are consistent with the extension direction of the heat exchange plate 1 and are both toward the length direction of the frame 21. The battery tray 100 can be assembled with the vehicle directly 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.

[0035] According to some embodiments of the present application, the extension plate 11 includes: a main body 13 and an adapter box 12, the main body 13 is connected to the heat exchange plate 1 and has the same extension direction as the heat exchange plate 1, and the main body 13 protrudes from the outer periphery of the frame 21; the adapter box 12 is arranged on one side of the main body 13 in the thickness direction, and a water inlet 10 and a water outlet 20 are provided on the adapter box 12. A first cavity and a second cavity are formed inside the adapter box 12, which connect the cooling channel with the water inlet 10 and the water outlet 20 respectively.

[0036] In some specific embodiments, the extension plate 11 is composed of a main body 13 and an adapter box 12. The main body 13 is arranged at the edge of the outer periphery of the frame 21, one end of the main body 13 is connected to the heat exchange plate 1, and the other end of the main body 13 protrudes from the outer periphery of the frame 21 and extends in a direction away from the heat exchange plate 1. The main body 13 is provided with an adapter box 12 on one side in the thickness direction. The main body 13 can be used to support and fix the adapter box 12, thereby improving the stability and reliability of the adapter box 12 during operation. A water inlet 10 and a water outlet 20 are formed on the side of the adapter box 12 away from the frame 21 in the length direction. A first cavity and a second cavity extending along the thickness direction of the adapter box 12 are also formed in the adapter box 12. The first cavity connects the water inlet 10 with the cooling channel, and the coolant flowing in the water inlet 10 along the length direction of the frame 21 can be converted into a water outlet along the first cavity when the coolant passes through the first cavity. The coolant flows in the thickness direction of the frame 21 and then flows into the cooling channel. The second cavity connects the water outlet 20 and the cooling channel. The coolant flowing in the length direction of the frame 21 in the cooling channel can be converted to flow in the thickness direction of the frame 21 and then flow into the water outlet 20 when passing through the second cavity. The flow direction of the coolant is converted again to flow along the length direction of the frame 21 when entering the water outlet 20. The battery tray 100 of this invention converts the first cavity and the second cavity so that the flow direction of the coolant in the cooling channel is the same as the flow direction at the water inlet and outlet 20, 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 and outlet directions 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.

[0037] According to some embodiments of the present application, the adapter box 12 includes: a shell and a baffle, and a water inlet 10 and a water outlet 20 are formed on the side of the shell facing away from the frame 21; 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 respectively connected to the water inlet 10 and the cooling channel, and the second cavity is respectively connected to the water outlet 20 and the cooling channel.

[0038] 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 provided 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 respectively in the thickness direction of the adapter box 12. 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.

[0039] According to some embodiments of the present application, 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.

[0040] In some specific embodiments, a first flow path and a second flow path are formed in the main body 13, the first flow path extends in the horizontal direction, the second flow path extends in the horizontal direction, one end of the first flow path is communicated with the first cavity, the other end of the first flow path is communicated with the cooling flow channel, one end of the second flow path is communicated with the second cavity, the other end of the second flow path is communicated with the cooling flow channel, and the flow of the cooling liquid between the first cavity and the heat exchange flow channel and the second cavity and the heat exchange flow channel is respectively realized through the first flow path and the second flow path, at least part of the inner wall of the first cavity is formed with a first guide wall, the first guide wall is formed with a first wall and a second wall, and the first guide wall is formed with a first wall and a second wall. One wall is opposite to the first flow path, the second wall is opposite to the water inlet 10, and there is an arc transition between the first wall and the second wall. A second guide wall is formed in the second cavity, and the second guide wall is formed with a third wall and a fourth wall. The third wall is opposite to the second flow path, and the fourth wall is opposite to 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 transition, thereby ensuring the stability and flow rate of the coolant during flow.

[0041] According to some embodiments of the present application, 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 main body 13 includes: a first adapter plate 111 plate and a second adapter plate 112, the first adapter plate 111 plate and the first heat exchange plate 1 are constructed as an integral part and a adapter groove connected to the flow channel groove 101 is formed on the first adapter plate 111, the second adapter plate 112 and the second heat exchange plate 1 are constructed as an integral part and cover the first adapter plate 111 and close the adapter groove to define a adapter flow channel connected to the cooling flow channel; wherein the adapter box 12 is arranged on one side of the second adapter plate 112 in the thickness direction, and the second adapter plate 112 is formed with an adapter hole that connects the adapter flow channel with the first cavity and the second cavity respectively.

[0042] In some specific embodiments, the heat exchange plate 1 is constructed as two, the two heat exchange plates 1 are respectively a first heat exchange plate 1 and a second heat exchange plate 1, the first heat exchange plate 1 is provided with a flow channel 101 recessed in a direction away from the second heat exchange plate 1, the flow channel 101 is constructed as a plurality of, the coolant flows in the flow channel 101, thereby realizing cooling of the battery accommodating cavity, the second heat exchange plate 1 covers the first heat exchange plate 1, the second heat exchange plate 1 can close the flow channel 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, thereby ensuring the stability and Reliability; The main body 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 constructed as an integral part, and the second adapter plate and the second heat exchange plate 1 are constructed as an integral part. On the one hand, the first adapter plate 111 can be manufactured with the first heat exchange plate 1 through the same mold, and the second adapter plate 112 can be manufactured with the second heat exchange plate 1 through the same mold, which reduces the number of parts and reduces the manufacturing cost. On the other hand, it makes it easier to assemble and disassemble 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, reducing The difficulty of cleaning and maintaining the first heat exchange plate 1 and the second heat exchange plate 1 is that the first adapter 111 groove and the second adapter groove that are connected to the flow channel groove 101 are formed on the first adapter 111 plate. The structure of the first adapter 111 groove and the second adapter groove are different. The first adapter 111 groove is connected to the four flow channel grooves 101, and the second adapter groove is connected to the three flow channel grooves 101. The first adapter 111 groove is connected to the water inlet 10, and the second adapter groove is connected to the water outlet 20. This design has a certain anti-foolproof effect and effectively prevents the water inlet and water outlet from being installed upside down. The first adapter 111 plate is also covered with the second heat exchange plate 1, and the second heat exchange plate 1 is also covered with the second heat exchange plate 1. Plate 1 can close the adapter groove to define the adapter flow channel, and the adapter flow channel is connected to the heat exchange flow channel. The second heat exchange plate 1 can effectively prevent the coolant from flowing from the heat exchange flow channel into the adapter flow channel or from leaking when the adapter flow channel flows into the heat exchange flow channel, thereby ensuring the stability and reliability of the battery assembly during operation. The adapter box 12 is arranged on one side of the second adapter plate 112 in the thickness direction, and the second adapter plate 112 is formed with an adapter hole that connects the adapter flow channel with the first cavity and the second cavity respectively, so that the first cavity and the second cavity are connected to the adapter flow channel respectively, thereby realizing the change of the flow direction of the cooling liquid at the water inlet 10 and the water outlet 20.

[0043] According to some embodiments of the present application, a first connecting member 14 and a second connecting member 15 are formed on the side wall of the frame 21, the main body 13 is between the first connecting member 14 and the second connecting member 15, the main body is provided with a first side edge 113 on the side close to the first connecting member 14, and the main body is provided with a second side edge 114 on the side close to the second connecting member 15, and the first side edge 113 and the second side edge 114 extend obliquely toward each other in a direction away from the frame 21.

[0044] In some specific embodiments, the frame 21 is formed with a first connecting member 14 and a second connecting member 15 protruding from the outer periphery of the frame 21 on one side wall in the longitudinal direction, and a main body 13 is provided between the first connecting member 14 and the second connecting member 15. The main body 13 is formed with a first edge, a second edge, a third edge, a first side edge 113 and a second side edge 114. The first edge is provided close to the first connecting member 14, and the second edge is provided close to the second connecting member 15. The first edge and the second edge are provided in parallel, and the first edge and the second edge are respectively perpendicular to the side wall of the frame 21. The first side edge 113 is connected to the first edge, and the second side edge 114 is connected to the second edge. The first side edge 113 and the second side edge 114 are inclined toward each other away from one end of the first edge and the second edge, and the first side edge 113 and the first connecting member are provided in parallel. 14, and there is a certain distance between the second side 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, thereby ensuring the stability and reliability of the battery assembly during operation. In addition, some other components are provided on the main body 13, and there is also a certain gap between the other components provided on the main body 13 and the first connecting member 14 and the second connecting member 15. The other components provided on the main body 13 will not interfere with the first connecting member 14 and the second connecting member 15, thereby further improving the stability and reliability of the battery assembly during operation. The third side connects the first side 113 and the second side 114 away from one end of 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.

[0045] According to some embodiments of the present application, a first ear 23 and a second ear 24 are respectively provided on both sides of the shell in the width direction, and the first ear 23 and the second ear 24 are respectively fixedly connected to the main body 13. On the one hand, the first ear 23 and the second ear 24 respectively fix and support the adapter box 12, thereby improving the strength of the connection structure between the main body 13 and the shell, improving the stability and reliability of the connection between the shell and the main body 13, avoiding the loosening or falling of the adapter box 12 during 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 protect the internal structure of the adapter box 12 to prevent internal damage of the adapter box 12 when it is subjected to external impact.

[0046] According to some embodiments of the present application, the battery tray 100 further includes: a connecting plate 22 , which is disposed on one side of the extension plate 11 in the thickness direction and connects the extension plate 11 to the frame 21 .

[0047] 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, and 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, thereby enhancing the stability and reliability of the battery assembly when docking with the vehicle.

[0048] According to some embodiments of the present application, 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.

[0049] 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 panels 223, the first side panel 222 and the second side panel 223 extend in directions away from each other along the width direction of the frame 21, and the first side panel 222 and the second side panel 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 panel 11 to the frame 21 through the main body 221, the first side panel 222 and the second side panel 223, thereby further increasing the contact area between the frame 21 and the extension panel 11, and improving the stability and reliability of the connection between the frame 21 and the extension panel 11.

[0050] The battery assembly according to the present application is briefly described below.

[0051] According to the battery assembly of the present application, a battery tray 100 of any one of the above-mentioned embodiments is provided. Since the battery assembly of the present application is provided with the battery tray 100 of any one of the above-mentioned embodiments, a battery pack 2 is also provided in the battery assembly. The battery pack 2 is constructed as 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 accommodated in a battery accommodating cavity. Therefore, according to the battery assembly of the present application, the water inlet 10 and the water outlet 20 of the heat exchange plate 1 are arranged outside the frame 21, and the opening direction of the water inlet 10 and the water outlet 20 is consistent with the extension 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 channel conversion assembly, so that the assembly and disassembly efficiency of the battery assembly and the electrical equipment is 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, thereby improving the safety and reliability of the battery assembly during operation.

[0052] In some specific embodiments, the first direction can be constructed as the length direction of the battery assembly, the second direction can be constructed as the width direction of the battery assembly, and the third direction can be constructed as the height direction of the battery assembly. The plurality of battery cells 60 are arranged in sequence in the second direction to form a 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 also includes a heat exchange plate 1, which is arranged on one side of the plurality of battery packs 2 in the third direction, and the plurality of battery cells 60 are respectively stopped against the heat exchange plate 1 to allow the heat exchange to The plate 1 can heat or cool multiple battery cells 60. Multiple heat exchange zones are formed in the heat exchange plate 1. One heat exchange zone corresponds to multiple battery packs 2. Multiple branch flow paths are formed in each heat exchange zone. One battery pack 2 corresponds to multiple branch flow paths. A water inlet flow path and a water outlet flow path are formed in the heat exchange plate 1. The heat exchange plate 1 is also provided with a water inlet 10 and a water outlet 20. One end of the water inlet flow path is connected to the water inlet 10 and the other end is connected to the upstream end of the branch flow path. One end of the water outlet flow path is connected to the water outlet 20 and the other end is connected to the downstream end of the branch flow path.

[0053] 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 path and the water outlet flow path in sequence. The coolant exchanges heat with multiple battery cells 60 during the flow process. A 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 exchange heat with the battery pack 2, thereby 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, the above-mentioned setting can make the temperature of the battery pack 2 more stable during operation, and make the working efficiency of the battery pack 2 more stable, thereby improving the working stability of the battery assembly.

[0054] According to some embodiments of the present application, the heat exchange plate 1 is provided with a water inlet 10 and a water outlet 20, as well as a water inlet flow path connected to the water inlet 10 and a water outlet flow path connected to the water outlet 20. The heat exchange plate 1 is provided with a heat exchange area corresponding to a plurality of battery groups 2, and a plurality of branch flow paths corresponding to each battery group 2 are provided in the heat exchange area. The upstream end of the branch flow path is connected to the water inlet flow path, and the downstream end of the branch flow path is connected to the water outlet flow path.

[0055] According to some embodiments of the present application, in a heat exchange zone, 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, and the first flow direction is opposite to the second flow direction.

[0056] In some specific embodiments, the branch flow path extends 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 path and the water outlet flow path in sequence before being discharged from the water outlet 20. The coolant exchanges heat with the battery pack 2 during the flow process. 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 allowing the coolant to flow along the first flow direction in some branch flow paths, and the coolant to 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 can be avoided that some battery cells 60 in the heat exchange area have good heat exchange effects and some battery cells 60 have poor heat exchange effects, so that the heat exchange plate 1 can more evenly exchange heat with multiple battery cells 60 in the heat exchange area.

[0057] In a heat exchange zone, at least some adjacent branch flow paths have opposite flow directions and are connected to each other. Therefore, the above-mentioned arrangement allows the coolant to flow continuously in the heat exchange zone, preventing the coolant from directly entering the outlet flow path after passing through a branch flow path, thereby extending the time the coolant stays in the heat exchange zone and improving the utilization rate of the coolant.

[0058] According to some embodiments of the present application, 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.

[0059] 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. As an example, among the four branch flow paths arranged in sequence in the first direction, the branch flow paths located on both sides of the first direction are respectively constructed 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 constructed 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 satisfies: 0.3≤i1 / i2≤1, and there is no limitation here. Therefore, through the above setting, multiple branch flow paths can be connected in series with each other. The connection and / or parallel connection prolongs the residence time of the coolant in the heat exchange zone and improves the heat exchange effect of the coolant on the battery pack 2. At the same time, it can be understood that the flow of the coolant along the first flow direction or the second flow direction will cause the heat exchange effect of the coolant to gradually decrease in the flow direction of the coolant, resulting in a phenomenon in which some battery cells 60 in a battery pack 2 have good heat exchange effects and some battery cells 60 have poor heat exchange effects. Therefore, by allowing the coolant to flow along the first flow direction and the second flow direction in multiple branch flow paths respectively, a more balanced heat exchange of the multiple battery cells 60 of the battery pack 2 can be achieved, thereby improving the heat exchange effect of the battery pack 2, making the temperature of the battery pack 22 more stable during operation, thereby making the working efficiency of the battery pack 2 more stable, and further improving the working stability of the battery assembly.

[0060] According to some embodiments of the present application, multiple branch flow paths include: a first branch flow path 31, a second branch flow path 32 and a third branch flow path 33, and the first branch flow path 31 and the second branch flow path 32 are respectively arranged on both sides of the heat exchange zone in the first direction; the third branch flow path 33 is constructed to be 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 multiple third branch flow paths 33; wherein in at least one heat exchange zone, 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 the first branch flow path 31 and the second branch flow path 32 of at least one heat exchange zone 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.

[0061] 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 connected to the water inlet flow path, and the other end of the first branch flow path 31 and the other end of the second branch flow path 32 are respectively connected to at least one third branch flow path 33. Among the multiple third branch flow paths 33, the third branch flow path 33 connected to the first branch flow path 31 and the third branch flow path 33 connected to the second branch flow path 32 are respectively connected to the outlet flow path. Of course, it can also be that one end of one of the multiple third branch flow paths 33 is respectively connected to 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 connected to the outlet flow path. There is no limitation here.

[0062] Within a heat exchange zone, the portion of the battery pack 2 near the periphery of the heat exchange zone is configured as an edge portion. Because the edge portion has a larger contact area with the external environment, when the heat exchange plate 1 heats multiple battery packs 2, heat loss at the edge portion is greater, resulting in lower heating efficiency of the heat exchange plate 1 for the battery packs 2. When the heat exchange plate 1 is adapted to heat the battery packs 2, the coolant begins heating the multiple battery assemblies 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 correspond to the edge portion, respectively. Since the coolant experiences less heat loss when flowing through 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 have a better heating effect on the edge portion. Therefore, this arrangement improves the heating effect on the edge portion and eliminates heat loss at the edge portion, thereby ensuring more balanced heating of the battery packs 2 corresponding to the heat exchange zone by the coolant, improving the heating effect of the battery packs 2 corresponding to the heat exchange zone and enhancing the cold start capability of the battery assemblies.

[0063] In other specific embodiments, in multiple heat exchange zones, the first branch flow path 31 in at least one heat exchange zone is connected to the water inlet flow path and the second branch flow path 32 is connected to the water outlet flow path. Therefore, after the coolant enters the heat exchange zone from the water inlet flow path, the coolant passes through the first branch flow path 31, the third branch flow path 33 and the second branch flow path 32 in sequence before entering the water outlet flow path. The coolant flow path is simple, which simplifies the setting method 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, extends the residence time of the coolant in the heat exchange zone, thereby improving the utilization rate of the coolant.

[0064] It is worth mentioning that the first branch flow paths 31 can be constructed as multiple ones connected in parallel with each other. As an 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. As an 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.

[0065] According to some embodiments of the present application, 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.

[0066] 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, which improves 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.

[0067] 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, it can be that the coolant enters the water inlet flow path from the water inlet 10, exchanges heat with the first heat exchange area, and then returns 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 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 returns 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 returns 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.

[0068] The water inlet flow path includes: a first water inlet flow path 41, a second water inlet flow path 42 and a third water inlet flow path 43. One end of the first water inlet flow path 41 is connected to the water inlet 10, and at least a part of the first water inlet flow path 41 is arranged at the periphery of the first heat exchange zone. The other end of the first water inlet flow path 41 is connected to the first branch flow path 31 and the second branch flow path 32 of the second heat exchange zone. Thus, the coolant enters the second heat exchange zone after flowing through the periphery of the first heat exchange zone, and in the first direction, the coolant starts to exchange heat with the second heat exchange zone from both sides of the second heat exchange zone. It can be understood that as the coolant flows, the heat loss of the coolant gradually increases. Thus, the heat loss of the coolant when flowing in the first branch flow path 31 and the second branch flow path 32 of the second heat exchange zone is small. At this time, the cooling effect of the coolant on the edge is good. Therefore, the above-mentioned arrangement can improve the heating effect of the edge of the battery pack 22 corresponding to the second heat exchange zone, thereby improving the cold start capability of the battery assembly.

[0069] The water outlet flow path includes: a first water outlet flow path 51, a second water outlet flow path 52, a third water outlet flow path 53 and a fourth water outlet flow path 54. One end of the first water outlet flow path 51 is connected to at least one third branch flow path 33 of the second heat exchange zone, and the other end of the first water outlet flow path 51 flows through the periphery of the fourth heat exchange zone and the third heat exchange zone in sequence and is connected to the water outlet 20. As a result, the coolant flows through the second heat exchange zone and then enters the first water outlet flow path 51. When the coolant flows in the first water outlet flow path 51, it can exchange heat with the edge of the fourth heat exchange zone and the third heat exchange zone, thereby improving the utilization rate of the coolant. It can be understood that the first water outlet flow path 51 collects the coolant in multiple branch flow paths in the second heat exchange zone. Therefore, the flow rate of the coolant in the first water outlet flow path 51 is greater than the flow rate of the coolant in the branch flow path of the second heat exchange zone. When the coolant flows in the first water outlet flow path 51 and exchanges heat with the edge parts of the fourth heat exchange zone and the third heat exchange zone, the large flow rate of the coolant in the first water outlet flow path 51 can improve the heating effect on the edge parts of the fourth heat exchange zone and the third heat exchange zone, so that the heat exchange plate 1 heats the multiple battery groups 2 more evenly, thereby improving the cold start capability of the battery assembly.

[0070] According to some embodiments of the present application, the cross-sectional area of ​​the branch flow path in the first heat exchange zone is S1, the cross-sectional area of ​​the branch flow path in the second heat exchange zone is S2, the cross-sectional area of ​​the branch flow path in the third heat exchange zone is S3, and the cross-sectional area of ​​the branch flow path in the fourth heat exchange zone is S4, satisfying: S4>S2>S3>S1. It is understood that the flow resistance of the coolant in the branch flow path can be controlled by setting a block or the like in the branch flow path, or by controlling the cross-sectional area of ​​the branch flow path to control the flow resistance of the coolant in the branch flow path, which is not limited here. Therefore, by setting S4>S2>S3>S1, R1>R3>R2>R4 can be achieved, thereby achieving Q4>Q2>Q3>Q1.

[0071] The following briefly describes the electrical equipment according to the present application.

[0072] The electric device according to the present application is provided with the battery assembly of the above-mentioned embodiment. Since the electric device according to the present invention is provided with the battery assembly described in any one of the above-mentioned embodiments, the electric device has high working stability; wherein the above-mentioned electric device can be constructed as a vehicle.

[0073] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0074] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0075] In the description of this application, “plurality” means two or more.

[0076] In the description of the present application, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features being in contact with each other not directly but via another feature therebetween.

[0077] In the description of this application, a first feature “on”, “above” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0078] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0079] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery tray, wherein, 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 1 or 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, wherein, 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 any one of claims 3-5, wherein, 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 any one of claims 3-6, wherein A first connecting member and a second connecting member are formed on a side wall of the frame. The body portion is located between the first connecting member and the second connecting member. A first side edge is provided on a side of the body portion close to the first connecting member, and a second side edge is provided on a side of the body portion close to the second connecting member. 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 or 5, wherein, First and second lugs are respectively provided on two sides of the housing in the width direction, and the first and second lugs are respectively fixedly connected to the body portion.

9. The battery tray according to any one of claims 1-8, wherein, 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, wherein, 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 two 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 end faces of the frame in the thickness direction.

11. A battery assembly, wherein, Comprising: A battery pack, which is configured to be a plurality 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, wherein, 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. An upstream end of the branch flow path is communicated with the inlet water flow path, and a 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 or 13, 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 any one of claims 12-14, wherein, The plurality of branch flow paths include: A first branch flow path and a second branch flow path, which are respectively arranged on two 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 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 communicated 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.

Images