Battery pack

Abstract

In the present disclosure, a battery pack is provided. The battery pack includes a plurality of battery cells each having a shell, a cell, and a plurality of terminals. An accommodation space is defined inside the shell, the cell is disposed in the accommodation space, at least a first surface and a second surface are provided on the shell, the terminals are disposed on the cell, and the plurality of battery cells extend from the first surface of the shell. An electrical connection member is disposed opposite to each of two adjacent first surfaces and is electrically connected to each of two adjacent terminals so as to electrically connect two adjacent battery cells. A heat transfer member is provided that can transfer heat from the electrical connection member to the second surface.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims the priority and benefit of Chinese Patent Application No. 2022215794545, entitled "BATTERY PACK", filed on June 22, 2022. The entire content of the above - referenced application is incorporated herein by reference.

[0002] This disclosure relates to the technical field of heat dissipation of battery packs, and more particularly, to battery packs.

Background Art

[0003] A battery pack typically consists of a battery core and a plurality of battery cells having a plurality of terminals. The corresponding terminals of the battery cells are connected by electrical connection members. Conventional electrical connection members are typically connection sheets directly welded to the terminals. During charging and discharging of the battery pack, the heat released from the terminals is transmitted to the connection sheet. The connection sheet can dissipate heat by itself alone. Therefore, when the connection sheet carries an excessively high current, the temperature of the connection sheet tends to rise rapidly, and the heat dissipation by the connection sheet itself cannot meet the demand, so the temperature of the connection sheet rises excessively, which has an adverse effect on the battery core.

Summary of the Invention

Problems to be Solved by the Invention

[0004] This disclosure provides at least a novel technical solution for a battery pack that can solve the problem of heat dissipation of electrical connection members in the prior art.

Means for Solving the Problems

[0005] The present disclosure provides a battery pack, the battery pack including a plurality of battery cells each including a shell, a battery core, and a plurality of terminals, an accommodation space being defined inside the shell, the battery core being disposed in the accommodation space, at least a first surface and a second surface being provided on the shell, the terminals being disposed on the battery core and extending from the first surface of the shell, a plurality of battery cells, an electrical connection member disposed opposite to each of two adjacent first surfaces and electrically connected to each of two adjacent terminals so as to electrically connect two adjacent battery cells, and a heat transfer member capable of transferring heat from the electrical connection member to the second surface.

[0006] Optionally, the electrical connection member includes a first connection piece, a positive projection of the first connection piece on the first surface covering the terminal, and a second connection piece disposed outside the first connection piece, a positive projection of the second connection piece on the first surface being spaced apart from the terminal, the second connection piece being in thermal conductive connection with the heat transfer member.

[0007] Optionally, the electrical connection member is a sheet-like body.

[0008] Optionally, the battery pack further includes a mounting seat disposed on a side of the second connection piece away from the terminal so as to define at least a part of the position of the heat transfer member with respect to the electrical connection member, the mounting seat being in thermal conductive connection with each of the second connection piece and at least a part of the heat transfer member.

[0009] Optionally, two second connection pieces are provided, disposed on both sides of the first connection piece respectively, and two mounting seats are provided, each having a one-to-one correspondence with one of the two second connection pieces.

[0010] Optionally, a clamping groove is provided on a side of the mounting seat away from the terminal for mounting at least a part of the heat transfer member.

[0011] Optionally, the heat transfer member is a radiator at least partially arranged opposite the electrical connection member and configured to exchange heat with the electrical connection member, the radiator having a first cooling flow path, and a cooler at least partially in thermally conductive connection with the second surface, the cooler having a second cooling flow path in communication with the first cooling flow path so as to transfer heat from the electrical connection member to the second surface.

[0012] Optionally, the radiator includes a plurality of straight pipes and elbow pipes arranged at the ends of the straight pipes so as to connect adjacent straight pipes to each other.

[0013] Optionally, the shell has edges extending along a first direction, a second direction, and a third direction. The first direction and the second direction define a first plane, the first direction and the third direction define a second plane, and the second direction and the third direction define a third plane. The first surface is connected to the second surface, the first surface is parallel to the third plane, and the second surface is parallel to the second plane.

[0014] Optionally, the surface area of the second surface is larger than the surface area of the first surface.

[0015] The battery pack according to the present disclosure is essentially composed of a plurality of battery cells, an electrical connection member, and a heat transfer member. The electrical connection member can electrically connect adjacent battery cells and faces the first surface. The heat transfer member can transfer heat from the electrical connection member to the vicinity of the second surface. The electrical connection member is provided to electrically connect two adjacent terminals extending from the first surface, and the heat transfer member transfers heat from the electrical connection member to the second surface. In this way, it becomes possible to effectively prevent excessive high temperatures of the terminals and the electrical connection member by allowing the heat transfer member to release the heat in the electrical connection member, which is preferable for achieving rapid charging.

[0016] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the drawings.

[0017] The foregoing and / or additional aspects and advantages of the present disclosure will become apparent and understandable from the following description of embodiments with reference to the drawings.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Modes for Carrying Out the Invention

[0019] Embodiments of the present disclosure are described in detail below. Examples of the embodiments are shown in the drawings, and the same or similar reference numerals throughout the drawings indicate the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are exemplary only and are intended to illustrate the present disclosure and should not be construed as a limitation of the present disclosure.

[0020] A battery pack according to an embodiment of the present disclosure is described in detail below with reference to the drawings.

[0021] As shown in FIGS. 1 to 4, a battery pack according to an embodiment of the present disclosure includes a plurality of battery cells 10, an electrical connection member 20, and a heat transfer member.

[0022] Specifically, each of the battery cells 10 includes a shell 11, a battery core, and a plurality of terminals 12. An accommodation space is defined inside the shell 11. The battery core is disposed in the accommodation space. The shell 11 has at least a first surface 111 and a second surface 112. The terminals 12 are disposed on the battery core and extend from the first surface 111 of the shell 11. The electrical connection member 20 is disposed opposite to each of two adjacent first surfaces 111 and is electrically connected to each of two adjacent terminals 12 so as to electrically connect two adjacent battery cells 10. The heat transfer member can transfer heat from the electrical connection member 20 to the second surface 112.

[0023] In other words, the battery pack according to the embodiment of the present disclosure is essentially composed of a plurality of battery cells 10, an electrical connection member 20, and a heat transfer member. The electrical connection member 20 can electrically connect the terminals 12 of adjacent battery cells 10. The heat transfer member can transfer heat from the electrical connection member 20 facing the first surface 111 to the vicinity of the second surface 112.

[0024] The battery cell 10 includes a shell 11, a battery core, and a plurality of terminals 12. A single battery core or a plurality of battery cores may be provided. The plurality of terminals 12 may be divided into terminal groups. Each terminal group includes one positive terminal and one negative terminal. One battery core may correspond to at least one terminal group. For example, when the battery cell 10 includes one battery core, the battery cell 10 may include two terminals 12, a positive terminal and a negative terminal. When the battery cell 10 includes N battery cores, the battery cell 10 may include N positive terminals and N negative terminals. The positive terminal and the negative terminal in the terminal group may be disposed on the same side or different sides of the battery core, and are not limited herein. Also, an accommodation space is defined inside the shell 11 to accommodate the battery core.

[0025] The shell 11 has at least a first surface 111 and a second surface 112. The first surface 111 and the second surface 112 are not in the same plane. The terminal 12 is disposed on the corresponding battery core and extends from the first surface 111 of the shell 11. Specifically, each of the terminals 12 of each battery cell 10 extends from the first surface 111 of the shell 11. It should be noted that the terminals 12 in the terminal group may extend from the same first surface 111 or different first surfaces 111. For example, the positive terminal extends from one first surface 111, and the negative terminal extends from another surface. Alternatively, both the positive terminal and the negative terminal extend from the same first surface 111. Also, the terminals corresponding to a plurality of terminal groups may extend from the same first surface 111 or different first surfaces 111, which will not be described in detail here. That is, as long as the terminal 12 extends from the first surface 111, all of these configurations are considered to be within the protection scope of the present disclosure.

[0026] The battery core may be a rechargeable secondary battery core. Specifically, the battery core may be a lithium iron phosphate battery core, a ternary lithium battery core, etc., or a combination thereof, which is not limited here.

[0027] Further, the electrical connection member 20 is disposed to face each of two adjacent first surfaces 111 and is electrically connected to each of two adjacent terminals 12. For example, the inner surface of the electrical connection member 20 is disposed to face each of the first surfaces 111 of two adjacent battery cells 10 and is electrically connected to each of two adjacent terminals 12 on the two battery cells 10 so as to electrically connect the two adjacent battery cells 10 to each other. The number of the electrical connection members 20 may be set according to the number and arrangement configuration of the battery cells 10 in the battery pack, whereby the battery cells 10 in the battery pack are each electrically connected by the electrical connection member 20. For example, a plurality of battery cells 10 are arranged in order as a first battery cell, a second battery cell, a third battery cell, ……, an Nth battery cell. The first battery cell and the second battery cell may share one electrical connection member 20, the third battery cell and the fourth battery cell may share another electrical connection member 20, and this continues until the battery cells 10 in the battery pack are each electrically connected by the electrical connection member 20.

[0028] It should be noted that when the electrical connection member 20 electrically connects adjacent terminals 12, heat at the terminals 12 can also be transmitted to the electrical connection member 20. The heat transfer member can transfer heat from the electrical connection member 20 to the vicinity of the second surface 112 for heat dissipation. That is, by providing the heat transfer member in the vicinity of the first surface 111, heat can be transferred from the electrical connection member 20 and the terminal 12 extending from the first surface 111 to the vicinity of the second surface 112 for heat dissipation.

[0029] Therefore, the battery pack according to the present disclosure is essentially composed of a plurality of battery cells 10, an electrical connection member 20, and a heat transfer member. The electrical connection member 20 can electrically connect adjacent battery cells 10 and is disposed opposite the first surface 111. The heat transfer member can transfer heat from the electrical connection member 20 to the vicinity of the second surface 112. The electrical connection member 20 is provided to electrically connect two adjacent terminals 12 extending from the first surface 111, and the heat transfer member transfers heat from the electrical connection member 20 and the terminals 12 to the vicinity of the second surface 112. In this way, the heat transfer member can transfer heat and release the heat from the vicinity of the electrical connection member 20 and the terminals 12 through the vicinity of the second surface 112 for heat dissipation, whereby excessive high temperatures of the terminals 12 and the electrical connection member 20 can be effectively prevented, which is preferable for achieving rapid charging.

[0030] According to an embodiment of the present disclosure, the electrical connection member 20 includes a first connection piece 21 and a second connection piece 22. The orthographic projection of the first connection piece 21 on the first surface 111 covers the terminal 12. The second connection piece 22 is disposed outside the first connection piece 21. The orthographic projection of the second connection piece 22 on the first surface 111 is spaced apart from the terminal 12. The second connection piece 22 is in thermal conductive connection with the heat transfer member.

[0031] Specifically, the electrical connection member 20 is essentially composed of the first connection piece 21 and the second connection piece 22. The first connection piece 21 and the second connection piece 22 may adopt an integrally formed structure, thereby smoothing the process and reducing production costs. Since the orthographic projection of the first connection piece 21 on the first surface 111 covers the terminal 12, the first connection piece 21 may be provided with a connection structure for connection to the terminal 12. That is, the terminal 12 can be electrically connected to the first connection piece 21. If effective heat transfer can be achieved when the first connection piece 21 and the terminal 12 are electrically connected, the connection between the first connection piece 21 and the terminal 12 may be made through welding or other means.

[0032] Further, the second connection piece 22 may extend from the end of the first connection piece 21 to the outside of the first connection piece 21. The orthographic projection of the second connection piece 22 on the first surface 111 is spaced apart from the terminal 12. That is, the second connection piece 22 may be in indirect contact with the terminal 12. The heat transfer member is in thermally conductive connection with the second connection piece. Through the design of the second connection piece 22 spaced apart from the terminal 12, the structure for electrical connection with the terminal 12 can be designed on the side of the electrical connection member 20 that is farther from the first surface 111.

[0033] The specific process of heat transfer from the terminal 12 may be as follows. Heat is first transferred from the terminal 12 to the first connection piece 21, and then from the first connection piece 21 to the second connection piece 22. Thereafter, the heat transfer member transfers heat from the second connection piece 22 to the vicinity of the second surface 112 for heat dissipation, thereby improving the heat dissipation efficiency of the terminal 12 and preventing adverse effects on the battery core.

[0034] It should be noted that heat is not only dissipated from the second surface 112, but also continuously dissipated during heat transfer through the terminal 12, the electrical connection member 20, and the heat transfer member.

[0035] According to an embodiment of the present disclosure, the electrical connection member 20 is a sheet-like body. That is, the electrical connection member 20 may be an electrical connection sheet having a sheet-like structure, that is, the electrical connection sheet may have a first side surface and a second side surface. The first side surface may face the first surface 111, and the second side surface may face away from the second surface 112. Optionally, the electrical connection sheet may be a rectangular metal connection sheet, and the four corners of the rectangular metal connection sheet may be rounded corners.

[0036] When the electrical connection member 20 is a sheet-like body, the electrical connection member 20 may be parallel to the first surface 111, and the second connection piece 22 may extend from one end of the first connection piece 21 to the outside of the first connection piece 21 along a direction parallel to the first surface.

[0037] In the present embodiment, configuring the electrical connection member 20 as a sheet-like body not only enables easy production and manufacturing and good electrical conductivity and thermal conductivity, but also smoothens the connection between the heat transfer member and the second connection piece 22.

[0038] According to an embodiment of the present disclosure, the battery pack further includes a mounting seat 40 disposed on the side of the second connection piece 22 that is farther from the terminal 12 so as to define the position of at least a part of the heat transfer member with respect to the electrical connection member 20. The mounting seat 40 is in thermal conductive connection with each of the second connection piece 22 and at least a part of the heat transfer member.

[0039] Specifically, the battery pack further includes a mounting seat 40 disposed on the side of the second connection piece 22 that is farther from the terminal 12. That is, the mounting seat 40 may be mounted on the second connection piece 22 or may be disposed on the second side surface of the second connection piece 22.

[0040] Specifically, the mounting seat 40 can define the position of a part of the structure of the heat transfer member with respect to the electrical connection member 20. For example, the position of the heat transfer member is restricted by its position with respect to the second connection piece 22. The mounting seat 40 is in thermal conductive connection with the second connection piece 22 and at least a part of the heat transfer member. In this way, heat can be transmitted from the electrical connection member 20 to the heat transfer member by the mounting seat 40.

[0041] Optionally, the mounting seat 40 may be made of a thermally conductive insulating material such as a thermally conductive structural adhesive, thermally conductive silicone, and thermally conductive silicone grease. Thereby, the heat transfer efficiency of the mounting seat 40 is improved, and the heat transfer efficiency from the terminal 12 to the second surface 112 is enhanced.

[0042] Among the heat transfer members, the portion in direct contact with the mounting seat 40 for heat transfer has a rigid structure, and when the electrical connection member 20 is also made of a rigid metal, considering the heat transfer between the rigid structures where heat conduction becomes inefficient, a mounting seat 40 is provided between the electrical connection member 20 and the heat transfer member for heat transfer. As a result, both the electrical connection member 20 and the heat transfer member can be in sufficient contact with the mounting seat 40, thereby improving the heat transfer efficiency.

[0043] In the present embodiment, the mounting seat 40 on the side of the second connection piece 22 away from the terminal 12 can smooth the improvement of the assembly efficiency of the heat transfer member and enable the fixing of the position of the heat transfer member with respect to the electrical connection member 20.

[0044] According to an embodiment of the present disclosure, two second connection pieces 22 are provided and are respectively disposed on both sides of the first connection piece 21. Two mounting seats 40 are provided in a one-to-one correspondence with the two second connection pieces 22, respectively.

[0045] In other words, the second connection pieces 22 are respectively provided on both sides of the first connection piece 21. The corresponding mounting seats 40 are provided on the side of each of the second connection pieces 22 away from the first surface 111. Further, the heat transfer member is defined to face the two second connection pieces 22 by each of the two mounting seats 40.

[0046] Taking the electrical connection member 20, which is a rectangular connection sheet shown in FIGS. 1 to 3, as an example, the rectangular connection sheet has a length direction and a width direction. The first connection piece 21 may be at the central portion in the length direction of the rectangular connection sheet, and the two second connection pieces 22 may be at both end portions in the length direction of the rectangular connection sheet. The mounting seat 40 is connected to the side of the second connection piece 22 away from the first surface 111. At least a part of the heat transfer member faces each of the two second connection pieces 22.

[0047] In this embodiment, two second connection pieces 22 are provided, and heat is dissipated at a plurality of locations of the electrical connection member 20 through these two second connection pieces 22, respectively, through the corresponding mounting seats 40 and through a part of the heat transfer member. As a result, the heat dissipation area of the electrical connection member 20 is increased, and the heat dissipation efficiency is improved accordingly.

[0048] According to an embodiment of the present disclosure, a clamping groove 41 is provided on the side of the mounting seat 40 that is farther from the terminal 12 in order to attach at least a part of the heat transfer member.

[0049] Specifically, the mounting seat 40 is provided with a clamping groove 41 for attaching at least a part of the structure of the heat transfer member. The first side surface of the mounting seat 40 may be the side surface closer to the terminal 12. The first side surface of the mounting seat 40 is in thermally conductive connection with the second connection piece 22. The clamping groove 41 is provided on the side of the mounting seat 40 that is farther from the terminal 12. That is, the clamping groove 41 may be provided on each of the side surfaces of the mounting seat 40 other than the first side surface in order to attach at least a part of the heat transfer member, for example, to clamp at least a part of the heat transfer member in the clamping groove 41.

[0050] The assembly and operating principle of the mounting seat 40 will be described in detail using the mounting seat 40 having a rectangular parallelepiped shape as an example. The clamping groove 41 may be disposed on the side surface adjacent to the first side surface of the mounting seat 40. For example, as shown in FIG. 2, the mounting seat 40 may be substantially I-shaped. Two clamping grooves 41 may be provided in each mounting seat 40. One clamping groove 41 may be opened in a direction away from the first connection piece 21, and the other clamping groove 41 may be opened in a direction approaching the first connection piece 21. Adjacent electrical connection members 20 are spaced apart from each other in order, and the corresponding adjacent mounting seats 40 are spaced apart from each other in order. The ends of the clamping grooves 41 on each mounting seat 40 may communicate with the ends of the clamping grooves 41 on the adjacent mounting seats 40 so as to form a mounting space for attaching the heat transfer member. The plurality of clamping grooves 41 enable fixing and attachment at a plurality of positions on the heat transfer member.

[0051] Alternatively, the clamping groove 41 may be arranged on the side surface of the mounting seat 40 opposite to the first side surface. In this case, the clamping groove 41 may be opened in a direction away from the second connecting piece 22. A plurality of clamping grooves 41 may be provided, and the specific number may be set according to the actual heat dissipation requirement.

[0052] In this embodiment, by providing the clamping groove 41 on the mounting seat 40, advantages such as a simple structure and a convenient installation of at least a part of the heat transfer member structure are brought about. In addition, the surface of the groove wall of the clamping groove 41 can achieve a larger contact area, thereby enabling more sufficient and efficient heat transfer between the heat transfer member and the mounting seat 40.

[0053] According to an embodiment of the present disclosure, the heat transfer member includes a radiator 31 and a cooler.

[0054] Specifically, at least a part of the radiator 31 is arranged opposite to the electrical connection member 20 and can exchange heat with the electrical connection member 20. The radiator 31 has a first cooling flow path. At least a part of the cooler is thermally conductively connected to the second surface 112. The cooler has a second cooling flow path that communicates with the first cooling flow path so as to transfer heat from the electrical connection member 20 to the second surface 112.

[0055] In other words, the heat transfer member is essentially composed of a radiator 31 for exchange with the electrical connection member 20 and a cooler that is thermally conductively connected to the second surface 112. The radiator 31 has a first cooling flow path, and the cooler has a second cooling flow path that communicates with the first cooling flow path. Heat from the electrical connection member 20 can be transferred to the second surface 112 through the first cooling flow path and the second cooling flow path.

[0056] At least a part of the radiator 31 is arranged opposite to the electrical connection member 20. For example, a part of the radiator 31 may be mounted on the mounting seat 40. For example, this part may be clamped in the clamping groove 41.

[0057] Note that the coolant can be supplied to the first cooling channel and the second cooling channel. The coolant circulates inside the first cooling channel and the second cooling channel, and continuously transports heat from the electrical connection member 20 to the vicinity of the second surface 112 for heat dissipation.

[0058] In this embodiment, through the cooperation of the radiator 31 and the cooler, and by using the first cooling channel and the second cooling channel that communicate with each other, the heat transmitted to the electrical connection member 20 by the terminal 12 can be efficiently transmitted to the second surface 112 for heat dissipation, thereby improving the heat dissipation efficiency and preventing damage to the battery core caused by overheating of the terminal 12.

[0059] Optionally, the first cooling channel and the second cooling channel may be corresponding cooling pipes in the liquid-cooled fins or channels in the cooling circuit. When the radiator 31 includes the structure of the liquid-cooled fins, the liquid-cooled plate may be directly adhered to one side of the electrical connection member 20 by an adhesive for heat conduction structure for heat transfer.

[0060] According to an embodiment of the present disclosure, the radiator 31 includes a plurality of straight pipes 311 and elbow pipes 312 disposed at the ends of the straight pipes 311 so as to connect adjacent straight pipes 311 to each other.

[0061] Specifically, the radiator 31 may be a heat dissipation pipe. The radiator 31 may include a plurality of straight pipes 311 and elbow pipes 312 connecting the ends of adjacent straight pipes 311. For example, taking the second connection piece 22 of the electrical connection member 20 provided with the clamping groove 41 as shown in FIG. 2 as an example, the second connection pieces 22 on both sides of the first connection piece 21 may each correspond to two straight pipes 311 and one elbow pipe 312. The two straight pipes 311 and one elbow pipe 312 are connected to form a U-shaped pipe structure. The radiator 31 may include two U-shaped pipe structures. The straight pipe 311 may pass through the corresponding clamping groove 41. The straight pipes 311 corresponding to the two second connection pieces 22 may be connected by additional piping, and the straight pipes 311 corresponding to the two second connection pieces 22 are both in communication with the second cooling flow path of the cooler.

[0062] Also, the second connection pieces 22 on the same side may correspond to three or more straight pipes 311. The plurality of straight pipes 311 may be parallel to each other. The number of elbow pipes 312 may be set corresponding to the number of straight pipes 311. The straight pipes 311 and the elbow pipes 312 may form a meandering pipe structure. In this case, in order to attach the corresponding straight pipes 311, a plurality of clamping grooves 41 parallel to each other may be provided on the side of the mounting seat 40 arranged on the second connection piece 22 that is farther from the second connection piece 22.

[0063] In order to continuously transfer heat by circulating from the electrical connection member 20 to the second surface 112 and dissipate heat in the vicinity of the second surface 112 by the cooler, a cooling circuit can be formed by combining the cooler with a plurality of straight pipes 311 that cooperate with the elbow pipes 31 of the radiator 31.

[0064] It should be noted that the cooler may similarly include a plurality of straight pipes 311 and elbow pipes 312 connecting the straight pipes 311. The straight pipes 311 and the elbow pipes 312 may form a meandering pipe arrangement disposed in the vicinity of the second surface 112. By controlling the number of straight pipes 311, the length of the entire cooling circuit can be controlled, thereby controlling the heat dissipation efficiency.

[0065] Moreover, since heat can also be accumulated within the shell 11 of the battery cell 10, the cooler disposed on the second surface 112 can not only dissipate the heat dissipated from the terminal 12 and the electrical connection member 20, but also dissipate the heat from the shell 11, thereby preventing adverse effects on the battery core caused by overheating of the shell 11.

[0066] According to an embodiment of the present disclosure, the shell 11 has edges extending along a first direction, a second direction, and a third direction. The first direction and the second direction define a first plane, the first direction and the third direction define a second plane, and the second direction and the third direction define a third plane. The first surface 111 is connected to the second surface 112, the first surface 111 is parallel to the third plane, and the second surface 112 is parallel to the second plane.

[0067] Specifically, the shell 11 has at least three surfaces, namely, a first plane, a second plane, and a third plane. The first plane is parallel to each of the first direction and the second direction, the second plane is parallel to each of the first direction and the third direction, and the third plane is parallel to each of the second direction and the third direction.

[0068] That is, the first surface 111 is connected to the second surface 112, the first surface 111 is parallel to the third plane, and the second surface 112 is parallel to the second plane. That is, the first surface 111 is parallel to each of the second direction and the third direction, and the second surface 112 is parallel to each of the first direction and the third direction.

[0069] The shell 11 may be a hexahedron such as a rectangular shell having edges along a first direction, a second direction, and a third direction. The shell 11 may have two first planes defined by the first direction and the second direction, two second planes defined by the first direction and the third direction, and two third planes defined by the second direction and the third direction.

[0070] In this embodiment, heat is transferred from the terminal 12 extending from the first surface 111 to the vicinity of the second surface 112 connected to the first surface 111, so that the heat dissipation efficiency can be effectively improved, the total length of the heat dissipation pipe can be shortened, and thereby the production cost can be reduced.

[0071] Optionally, the battery pack may further include a heat dissipation fan that can be disposed opposite to the second flat surface 112. The heat dissipation rate of the second surface 112 can be increased by the heat dissipation fan, thereby further improving the heat dissipation efficiency.

[0072] According to an embodiment of the present disclosure, the surface area of the second surface 112 is larger than the surface area of the first surface 111. In this case, the first plane may be defined as the top surface or the bottom surface, the second plane may be defined as the end surface, and the third plane may be defined as the side surface. In this embodiment, since the surface area of the second surface 112 is larger than the surface area of the first surface 111, that is, the area of the end surface is smaller than the area of the side surface, the first plane may be defined as the large surface, and the third plane may be defined as the small surface. Since the large-area portion of the outer surface of the shell 11 is greatly expanded, the greatly expanded compression caused by the large-area contact between the cooler and the shell 11 can be prevented by defining the cooler to face the second surface 112 and determining the specific position of the second surface 112.

[0073] The battery pack of the present disclosure will be described in detail below using a rectangular parallelepiped-shaped shell 11 as an example.

[0074] The first direction, the second direction, and the third direction may be perpendicular to each other. As shown in FIG. 1, the shell 11 is a long and flat shell 11. As shown in the figure, the first direction may be the length direction of the shell 11, the second direction may be the width direction of the shell 11, and the third direction may be the thickness direction of the shell 11.

[0075] That is, the first direction may extend along the front-rear direction, the second direction may extend along the up-down direction, and the third direction may extend along the left-right direction. In this case, the first surface 111 may be the right side surface as shown in FIG. 1, and the second surface 112 may be the upper surface or the lower surface of the shell 11 as shown in FIG. 1. The terminal 12 is disposed on the right side surface of the shell 11. The electrical connection member 20, the mounting seat 40, and the straight pipe 311 of the radiator 31 each face the right side surface of the shell 11. The cooler may be disposed on the upper surface of the shell 11.

[0076] The area of the right side surface of the shell 11 is the product of the thickness of the shell 11 multiplied by the width of the shell 11. The area of the upper surface of the shell 11 is the product of the thickness of the shell 11 multiplied by the length of the shell 11. Therefore, the area of the right side surface of the shell 11 is smaller than the area of the upper surface of the shell 11. That is, the upper surface of the shell 11 has a larger heat dissipation area than the right side surface of the shell 11 and provides a larger space for disposing the cooler. Therefore, the electrical connection member 20 and the heat transfer member transfer heat from the terminal 12 to the vicinity of the second surface 112 for heat dissipation, thereby enabling improved heat dissipation efficiency.

[0077] In the description of the present disclosure, the orientation or positional relationship indicated by terms such as “upper (side)” and “lower (side)” is based on the orientation or positional relationship shown in the drawings, and it is not necessary that the present disclosure be constructed and operated in a specific orientation. It is merely used to facilitate the description of the present disclosure. Therefore, such terms should not be construed as a limitation of the present disclosure.

[0078] In the description of this specification, the descriptions regarding terms such as "one embodiment" and "another embodiment" mean that the specific features, structures, materials, or characteristics described in relation to this embodiment are included in at least one embodiment of the present disclosure. In this specification, the schematic citation of the above-mentioned terms is not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable form in any one or more embodiments or examples. Also, those skilled in the art may integrate or combine different embodiments or examples described in this specification, and the features of different embodiments or examples, as long as they do not conflict with each other. Also, it should be noted that in this specification, the terms "first" and "second" are used only for the purpose of description and should not be construed as indicating or suggesting relative importance or implicitly specifying the number of the technical features shown.

[0079] Although the embodiments of the present disclosure have been shown and described above, it can be understood that the foregoing embodiments are exemplary and should not be construed as limitations of the present disclosure. Those skilled in the art can make changes, modifications, substitutions, and variations to the foregoing embodiments within the scope of the present disclosure.

Explanation of Reference Numerals

[0080] 10 Battery cell 11 Shell 111 First surface 112 Second surface 12 Terminal 20 Electrical connection member 21 First connection piece 22 Second connection piece 31 Heat sink 311 Straight pipe 312 Elbow pipe 40 Mounting seat 41 Clamping groove

Claims

1. A plurality of battery cells (10) each including a shell (11), a battery core, and a plurality of terminals (12), wherein an accommodation space is defined inside the shell (11), the battery core is disposed in the accommodation space, the shell (11) is provided with at least a first surface (111) and a second surface (112), the terminals (12) are disposed on the battery core, and extending from the first surface (111) of the shell (11), a plurality of battery cells (10); An electrical connection member (20) disposed opposite to each of two adjacent first surfaces (111) and electrically connected to each of two adjacent terminals (12) so as to conduct electricity between two adjacent battery cells (10); A heat transfer member configured to transfer heat from the electrical connection member (20) to the second surface (112). A battery pack comprising the above components.

2. The electrical connection member (20) is A first connection piece (21), the orthographic projection of the first connection piece (21) on the first surface (111) covering the terminal (12), the first connection piece (21); A second connection piece (22) disposed outside the first connection piece (21), the orthographic projection of the second connection piece (22) on the first surface (111) being spaced apart from the terminal (12), and the second connection piece (22) being in thermally conductive connection with the heat transfer member, the second connection piece (22). The battery pack according to Claim 1, comprising the above components.

3. The electrical connection member (20) is a sheet-like body. The battery pack according to Claim 1 or 2.

4. The battery pack further comprises a mounting seat (40) disposed on the side of the second connection piece (22) away from the terminal (12) so as to determine the position of at least a part of the heat transfer member with respect to the electrical connection member (20), and the mounting seat (40) is in thermally conductive connection with each of the second connection piece (22) and at least the part of the heat transfer member. The battery pack according to any one of Claims 1 to 3.

5. Two second connection pieces (22) are provided and are respectively disposed on both sides of the first connection piece (21), and two mounting seats (40) are provided in a one-to-one correspondence with the two second connection pieces (22). The battery pack according to any one of Claims 1 to 4.

6. The battery pack according to any one of claims 1 to 5, wherein a clamping groove (41) is provided on a side of the mounting seat (40) away from the terminal (12) in order to mount at least a part of the heat transfer member.

7. The heat transfer member is a radiator (31) having at least a part thereof disposed to face the electrical connection member (20) and configured to exchange heat with the electrical connection member (20), the radiator (31) having a first cooling flow path, and a cooler having at least a part thereof in thermal conduction connection with the second surface (112), the cooler having a second cooling flow path communicating with the first cooling flow path so as to transfer heat from the electrical connection member (20) to the second surface (112). The battery pack according to any one of claims 1 to 6, comprising

8. The battery pack according to any one of claims 1 to 7, wherein the radiator (31) includes a plurality of straight pipes (311) and elbow pipes (312) disposed at ends of the straight pipes (311) so as to connect adjacent ones of the straight pipes (311).

9. The shell (11) has edges extending along a first direction, a second direction, and a third direction, the first direction and the second direction define a first plane, the first direction and the third direction define a second plane, and the second direction and the third direction define a third plane. The first surface (111) is connected to the second surface (112), the first surface (111) is parallel to the third plane, and the second surface (112) is parallel to the second plane. The battery pack according to any one of claims 1 to 8.

10. The battery pack according to any one of claims 1 to 9, wherein a surface area of the second surface (112) is larger than a surface area of the first surface (111).

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