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, titled "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 plurality of battery cells having battery cores and 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. When the battery pack is charged and discharged, 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. <​​​​​​​​​​​​​​​This disclosure provides a battery pack comprising a plurality of battery cells, each including a shell, a battery core, and a plurality of terminals, wherein a housing space is defined inside the shell, the battery core is disposed within the housing space, the shell is provided with at least a first surface and a second surface, the terminals are disposed on the battery core and extend from the first surface of the shell, an electrical connection member is disposed opposite each of two adjacent first surfaces and electrically connected to each of two adjacent terminals to conduct electricity between the two adjacent battery cells, and a heat transfer member is capable of transferring heat from the electrical connection member to the second surface.

[0006] Optionally, the electrical connection member includes a first connecting piece, the orthographic projection of which the first connecting piece on a first surface covers a terminal, and a second connecting piece positioned outside the first connecting piece, the orthographic projection of which the second connecting piece on a first surface is spaced apart from the terminal, and the second connecting piece is in thermal conduction connection with a heat transfer member.

[0007] Optionally, the electrical connection component is a sheet-like material.

[0008] Optionally, the battery pack further includes a mounting seat located on the side of the second connecting piece away from the terminals, such that it positions at least a portion of the heat transfer member relative to the electrical connecting member, and the mounting seat is thermally conductively connected to the second connecting piece and at least a portion of the heat transfer member.

[0009] Optionally, two second connecting pieces are provided, each positioned on either side of the first connecting piece, and two mounting seats are provided, each in a one-to-one correspondence with the two second connecting pieces.

[0010] Optionally, a clamping groove is provided on the mounting base on the side away from the terminals for attaching at least a portion of the heat transfer element.

[0011] Optionally, the heat transfer member includes a heat sink having a first cooling channel, the heat sink having at least a portion of which is positioned facing an electrical connection member and configured to exchange heat with the electrical connection member; and a cooler having a second cooling channel having at least a portion of which is thermally conductively connected to a second surface and communicating with the first cooling channel to transfer heat from the electrical connection member to the second surface.

[0012] Optionally, the heat sink includes a number of straight pipes and elbow pipes positioned at the ends of the straight pipes to connect adjacent straight pipes.

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

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

[0015] The battery pack according to this disclosure essentially comprises a plurality of battery cells, an electrical connection member, and a heat transfer member. The electrical connection member can conduct electricity between adjacent battery cells and faces a first surface. The heat transfer member can transfer heat from the electrical connection member to the vicinity of a 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, the heat transfer member dissipates heat from the electrical connection member, effectively preventing excessive heat buildup of the terminals and the electrical connection member, which is desirable for achieving rapid charging.

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

[0017] The aforementioned and / or additional aspects and advantages of this disclosure will become apparent and understandable from the following description of embodiments with reference to the drawings. [Brief explanation of the drawing]

[0018] [Figure 1] This is a perspective view of a part of the structure of a battery pack according to one embodiment provided in this disclosure. [Figure 2] This is an exploded view of a part of the structure of a battery pack according to one embodiment provided in this disclosure. [Figure 3] This is a right side view of a part of the structure of a battery pack according to one embodiment provided in this disclosure. [Figure 4] This is a front view of a portion of the structure of a battery pack according to one embodiment provided in this disclosure. [Modes for carrying out the invention]

[0019] Embodiments of this disclosure are described in detail below. Examples of 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 function. Embodiments described below with reference to the drawings are illustrative and intended only to illustrate this disclosure and should not be construed as limitations of this disclosure.

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

[0021] As shown in Figures 1 to 4, a battery pack according to one 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 conduct two adjacent battery cells 10 to each other. 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 to each other. 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, namely 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 terminals 12 are located on the corresponding battery core and extend 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. Note that terminals 12 in a group of terminals may extend from the same first surface 111 or from different first surfaces 111. For example, the positive terminal may extend from one first surface 111 and the negative terminal from another first surface. Alternatively, both the positive and negative terminals may extend from the same first surface 111. Also, terminals corresponding to multiple groups of terminals may extend from the same first surface 111 or from different first surfaces 111, which will not be described in detail here. In other words, as long as terminal 12 extends from the first surface 111, all of these configurations fall within the scope of protection of this 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, or a combination thereof, and is not limited thereto.

[0027] Furthermore, the electrical connection members 20 are positioned opposite each of the two adjacent first surfaces 111 and are electrically connected to each of the two adjacent terminals 12. For example, the inner surface of the electrical connection member 20 is positioned opposite each of the first surfaces 111 of the two adjacent battery cells 10 and is electrically connected to each of the two adjacent terminals 12 on the two battery cells 10 so as to make the two adjacent battery cells 10 electrically connected to each other. The number of electrical connection members 20 may be set according to the number and arrangement configuration of the battery cells 10 in the battery pack, so that each of the battery cells 10 in the battery pack is electrically connected by the electrical connection members 20. For example, multiple battery cells 10 are arranged in order as the first battery cell, the second battery cell, the third battery cell, ..., the Nth battery cell. The first and second battery cells may share one electrical connection member 20, and the third and fourth battery cells may share another electrical connection member 20, and this continues until each battery cell 10 in the battery pack is 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 from the terminals 12 can also be transferred 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 near the first surface 111, heat can be transferred from the electrical connection member 20 and the terminals 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 this 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 make adjacent battery cells 10 electrically connected to each other and is positioned facing 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 terminals 12 to the vicinity of the second surface 112. In this way, the heat transfer member can transfer heat and dissipate it from the vicinity of the electrical connection member 20 and terminals 12 through the vicinity of the second surface 112 for heat dissipation, thereby effectively preventing excessive heat buildup of the terminals 12 and electrical connection member 20, which is preferable for achieving rapid charging.

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

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

[0032] Furthermore, the second connecting piece 22 may extend from the end of the first connecting piece 21 outward from the first connecting piece 21. The orthographic projection of the second connecting piece 22 on the first surface 111 is spaced apart from the terminal 12. That is, the second connecting piece 22 may be in indirect contact with the terminal 12. The heat transfer member is thermally conductively connected to the second connecting piece. Through the design of the second connecting 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 away from the first surface 111.

[0033] The specific process of heat transfer from terminal 12 may be as follows: Heat is first transferred from terminal 12 to the first connecting piece 21, and then from the first connecting piece 21 to the second connecting piece 22. Subsequently, the heat transfer member transfers heat from the second connecting piece 22 to the vicinity of the second surface 112 for heat dissipation, thereby improving the heat dissipation efficiency of 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 is also continuously dissipated during heat transfer through the terminals 12, the electrical connection members 20, and the heat transfer members.

[0035] According to one 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 with a sheet-like structure, i.e., the electrical connection sheet may have a first side surface and a second side surface. The first side surface may face toward 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 connecting piece 22 may extend from one end of the first connecting piece 21 to the outside of the first connecting piece 21 in a direction parallel to the first surface.

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

[0038] According to one embodiment of the present disclosure, the battery pack further includes a mounting seat 40 positioned on the side of the second connecting piece 22 away from the terminal 12 so as to position at least a portion of the heat transfer member relative to the electrical connecting member 20. The mounting seat 40 is thermally conductively connected to each of the second connecting piece 22 and at least a portion of the heat transfer member.

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

[0040] Specifically, the mounting base 40 can determine the position of a part of the structure of the heat transfer member relative to the electrical connection member 20. For example, the heat transfer member is limited in position relative to the second connection piece 22. The mounting base 40 is thermally conductively connected to the second connection piece 22 and also to at least a part of the heat transfer member. In this way, heat can be transferred from the electrical connection member 20 to the heat transfer member by the mounting base 40.

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

[0042] When the portion of the heat transfer member that is in direct contact with the mounting seat 40 for heat transfer is a rigid structure, and the electrical connection member 20 is also made of a rigid metal, a mounting seat 40 is provided between the electrical connection member 20 and the heat transfer member to consider heat transfer between rigid structures where heat conduction is inefficient. This allows both the electrical connection member 20 and the heat transfer member to make sufficient contact with the mounting seat 40, thereby improving heat transfer efficiency.

[0043] In this embodiment, the mounting seat 40 on the side of the second connecting piece 22 that is further away from the terminal 12 can facilitate 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 one embodiment of the present disclosure, two second connecting pieces 22 are provided, each positioned on either side of the first connecting piece 21. Two mounting seats 40 are provided, each in a one-to-one correspondence with the two second connecting pieces 22.

[0045] In other words, the second connecting piece 22 is provided on each side of the first connecting piece 21. A corresponding mounting seat 40 is provided on the side of each second connecting piece 22 that is away from the first surface 111. The heat transfer member is positioned to face the two second connecting 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 Figures 1 to 3, as an example, the rectangular connection sheet has a length direction and a width direction. The first connecting piece 21 may be located in the center of the rectangular connection sheet in the length direction, and the two second connecting pieces 22 may be located at both ends of the rectangular connection sheet in the length direction. The mounting seat 40 is connected to the side of the second connecting piece 22 that is away from the first surface 111. At least a portion of the heat transfer member faces each of the two second connecting pieces 22.

[0047] In this embodiment, two second connecting pieces 22 are provided, and heat is dissipated at multiple locations on the electrical connection member 20 through the corresponding mounting seats 40 and through a portion of the heat transfer member by these two second connecting pieces 22, thereby increasing the heat dissipation area of ​​the electrical connection member 20 and improving the heat dissipation efficiency.

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

[0049] Specifically, the mounting base 40 is provided with a clamping groove 41 for mounting at least a part of the structure of the heat transfer member. The first side of the mounting base 40 may be the side closer to the terminal 12. The first side of the mounting base 40 is in thermal conduction connection with the second connecting piece 22. The clamping groove 41 is provided on the side of the mounting base 40 that is further away from the terminal 12. That is, the clamping groove 41 may be provided on each of the sides of the mounting base 40 other than the first side in order to mount 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 a mounting seat 40 with a rectangular parallelepiped structure as an example. The clamping grooves 41 may be located on the side of the mounting seat 40 adjacent to the first side. For example, as shown in Figure 2, the mounting seat 40 may be substantially I-shaped. Each mounting seat 40 may be provided with two clamping grooves 41. One clamping groove 41 may open away from the first connecting piece 21, and the other clamping groove 41 may open towards the first connecting piece 21. Adjacent electrical connecting members 20 are spaced apart from each other in sequence, and corresponding adjacent mounting seats 40 are spaced apart from each other in sequence. The ends of the clamping grooves 41 on each mounting seat 40 may communicate with the ends of the clamping grooves 41 on adjacent mounting seats 40 to form a mounting space for mounting the heat transfer member. Multiple clamping grooves 41 enable fixing and mounting at multiple positions on the heat transfer member.

[0051] Alternatively, the clamping groove 41 may be located on the side of the mounting seat 40 opposite to the first side, in which case the clamping groove 41 may open toward the direction away from the second connecting piece 22. Multiple clamping grooves 41 may be provided, and the specific number may be determined according to the actual heat dissipation requirements.

[0052] In this embodiment, providing the clamping groove 41 on the mounting seat 40 offers the advantages of a simple structure and easy mounting of at least a part of the structure of the heat transfer member. Furthermore, 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 one embodiment of the present disclosure, the heat transfer member includes a heat sink 31 and a cooler.

[0054] Specifically, at least a portion of the heat sink 31 is positioned facing the electrical connection member 20 and can exchange heat with the electrical connection member 20. The heat sink 31 has a first cooling channel. At least a portion of the cooler is in thermal conduction connection with the second surface 112. The cooler has a second cooling channel that communicates with the first cooling channel to transfer heat from the electrical connection member 20 to the second surface 112.

[0055] In other words, the heat transfer member essentially consists of a heat sink 31 for replacement with the electrical connection member 20 and a cooler that is thermally conductively connected to the second surface 112. The heat sink 31 has a first cooling channel, and the cooler has a second cooling channel that communicates with the first cooling channel. Heat from the electrical connection member 20 can be transferred to the second surface 112 by the first and second cooling channels.

[0056] At least a portion of the heat sink 31 is positioned opposite the electrical connection member 20. For example, a portion of the heat sink 31 may be mounted on a mounting base 40. For example, this portion may be clamped in a clamping groove 41.

[0057] It should be noted that coolant can be supplied to the first and second cooling channels. The coolant circulates within the first and second cooling channels, continuously transporting 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 heat sink 31 and the cooler, and by utilizing the first and second cooling channels that are in communication with each other, the heat transferred to the electrical connection member 20 by the terminal 12 can be efficiently transferred to the second surface 112 for heat dissipation, thereby improving heat dissipation efficiency and preventing damage to the battery core caused by overheating of the terminal 12.

[0059] Optionally, the first and second cooling channels may be corresponding cooling tubes or cooling circuits within the liquid cooling fins. If the heat sink 31 includes a liquid cooling fin structure, the liquid cooling plate may be directly bonded to one side of the electrical connection member 20 with a thermal conductive structural adhesive for heat transfer.

[0060] According to one embodiment of the present disclosure, the heat sink 31 includes a plurality of straight pipes 311 and elbow pipes 312 positioned at the ends of the straight pipes 311 to connect adjacent straight pipes 311 to each other.

[0061] Specifically, the radiator 31 may be a heat dissipation tube. The radiator 31 may include a plurality of straight tubes 311 and elbow tubes 312 connecting the ends of adjacent straight tubes 311. For example, as shown in Figure 2, taking as an example the second connecting piece 22 of an electrical connection member 20 provided with a mounting seat 40 having a clamping groove 41, the second connecting pieces 22 on both sides of the first connecting piece 21 may correspond to two straight tubes 311 and one elbow tube 312, respectively. The two straight tubes 311 and the elbow tube 312 are connected to form a U-shaped tube structure. The radiator 31 may include two U-shaped tube structures. The straight tubes 311 may pass through the corresponding clamping grooves 41. The straight pipes 311 corresponding to the two second connecting pieces 22 may be connected by additional piping, and both straight pipes 311 corresponding to the two second connecting pieces 22 are in communication with the second cooling passage of the cooler.

[0062] Furthermore, the second connecting piece 22 on the same side may correspond to three or more straight pipes 311. Multiple straight pipes 311 may be parallel to each other. The number of elbow pipes 312 may be set in correspondence with the number of straight pipes 311. The straight pipes 311 and elbow pipes 312 may form a meandering pipe structure. In this case, multiple parallel clamping grooves 41 may be provided on the mounting seats 40 located on the second connecting piece 22, on the side furthest from the second connecting piece 22, in order to attach the corresponding straight pipes 311.

[0063] A cooling circuit can be formed by the combination of multiple straight pipes 311, which cooperate with the elbow pipe 31 of the heat sink 31, and the cooler, in order to continuously transfer heat by circulating it from the electrical connection member 20 to the second surface 112 and to dissipate the heat in the vicinity of the second surface 112 by the cooler.

[0064] It should be noted that the cooler may also include a plurality of straight pipes 311 and elbow pipes 312 connecting the straight pipes 311 to each other. The straight pipes 311 and elbow pipes 312 may form a meandering piping arranged near the second surface 112. By controlling the number of straight pipes 311, the overall length of the cooling circuit can be controlled, thereby controlling the heat dissipation efficiency.

[0065] Furthermore, since heat can also accumulate within the shell 11 of the battery cell 10, the cooler positioned on the second surface 112 can not only dissipate the heat released from the terminals 12 and electrical connection members 20, but also dissipate heat from the shell 11, thereby preventing adverse effects on the battery core caused by overheating of the shell 11.

[0066] According to one embodiment of the present disclosure, the shell 11 has edges extending along a first direction, a second direction, and a third direction. The first and second directions define a first plane, the first and third directions define a second plane, and the second and third directions 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 faces, namely a first plane, a second plane, and a third plane. The first plane is parallel to the first and second directions, the second plane is parallel to the first and third directions, and the third plane is parallel to the second and third directions.

[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 the second direction and the third direction, and the second surface 112 is parallel to 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 and second directions, two second planes defined by the first and third directions, and two third planes defined by the second and third directions.

[0070] In this embodiment, heat dissipation efficiency can be effectively improved by transferring heat from the terminal 12 extending from the first surface 111 to the vicinity of the second surface 112 connected to the first surface 111, thereby shortening the overall length of the heat dissipation piping and reducing production costs.

[0071] Optionally, the battery pack may further include a cooling fan which can be positioned opposite the second plane 112. The heat dissipation rate of the second plane 112 can be increased by the cooling fan, thereby further improving the heat dissipation efficiency.

[0072] According to one 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 a top or bottom surface, the second plane may be defined as an end surface, and the third plane may be defined as a 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, i.e., the area of ​​the end surface is smaller than the area of ​​the side surface, the first plane may be defined as a large surface, and the third plane may be defined as a small surface. Because the large area portions of the outer surface of the shell 11 are greatly expanded, the greatly expanded large surface compression caused by the large area contact between the cooler and the shell 11 can be prevented by positioning the cooler to face the second surface 112 and defining the specific location of the second surface 112.

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

[0074] The first, second, and third directions may be perpendicular to each other. As shown in Figure 1, the shell 11 is a long, 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-to-back direction, the second direction may extend along the up-to-down direction, and the third direction may extend along the left-to-right direction. In this case, the first surface 111 may be the right side surface as shown in Figure 1, and the second surface 112 may be the top or bottom surface of the shell 11 as shown in Figure 1. The terminal 12 is located on the right side surface of the shell 11. The electrical connection member 20, the mounting base 40, and the straight tube 311 of the heat sink 31 each face the right side surface of the shell 11. The cooler may be located on the top surface of the shell 11.

[0076] The area of ​​the right side of the shell 11 is the thickness of the shell 11 multiplied by the width of the shell 11. The area of ​​the top surface of the shell 11 is the thickness of the shell 11 multiplied by the length of the shell 11. Therefore, the area of ​​the right side of the shell 11 is smaller than the area of ​​the top surface of the shell 11. In other words, the top surface of the shell 11 has a larger heat dissipation area than the right side of the shell 11, providing a larger space for arranging the cooler. Thus, 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 this disclosure, orientations or positional relationships indicated by terms such as “top” and “bottom” are based on the orientations or positional relationships shown in the drawings and are used merely to facilitate the description of this disclosure, and do not require that this disclosure be constructed and operated in any particular orientation. Therefore, such terms should not be construed as limitations of this disclosure.

[0078] In this specification, any description of terms such as “one embodiment” and “another embodiment” means that the specific features, structures, materials, or properties described in relation to this embodiment are encompassed in at least one embodiment of this disclosure. In this specification, a general reference to the foregoing terms is not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials, or properties described may be combined in appropriate ways in any one or more embodiments or examples. Also, a person skilled in the art may integrate or combine different embodiments or examples and features of different embodiments or examples described herein, provided that they do not conflict with each other. It should also be noted that in this specification, the terms “first” and “second” are used for illustrative purposes only and should not be construed as indicating or suggesting relative importance or implicitly specifying the number of technical features to be shown.

[0079] While embodiments of the Disclosure have been shown and described above, it is possible to see that these embodiments are illustrative and should not be understood as limitations of the Disclosure. Those skilled in the art can make changes, modifications, substitutions, and variations of the embodiments described above within the scope of the Disclosure. [Explanation of symbols]

[0080] 10 battery cells 11 Shells 111 First side 112 Second side 12 terminals 20 Electrical connection components 21 First connecting piece 22 Second connecting piece 31 Heat sink 311 straight pipe 312 Elbow pipe 40 Mounting base 41 Holding groove

Claims

1. A plurality of battery cells (10), each comprising a shell (11), a battery core, and a plurality of terminals (12), wherein a housing space is defined inside the shell (11), the battery core is disposed within the housing space, the shell (11) is provided with at least a first surface (111) and a second surface (112), and the terminals (12) are disposed on the battery core and extend from the first surface (111) of the shell (11), and the plurality of battery cells (10) An electrical connection member (20) is positioned opposite each of the two adjacent first surfaces (111) and is electrically connected to each of the two adjacent terminals (12) so as to provide electrical conductivity between the two adjacent battery cells (10), A heat transfer member configured to transfer heat from the electrical connection member (20) to the second surface (112) Equipped with, The aforementioned electrical connection member (20) is The first connecting piece (21) is such that the orthographic projection of the first connecting piece (21) on the first surface (111) covers the terminal (12), and the first connecting piece (21) is such that A second connecting piece (22) is positioned outside the first connecting piece (21), and the orthographic projection of the second connecting piece (22) on the first surface (111) is spaced apart from the terminal (12), and the second connecting piece (22) is in thermal conductive connection with the heat transfer member, and the second connecting piece (22) and Equipped with, The electrical connection member (20) is further provided with a mounting seat (40) positioned on the side of the second connecting piece (22) that is away from the terminal (12), the mounting seat (40) being thermally conductively connected to the second connecting piece (22) and at least the portion of the heat transfer member. Battery pack.

2. The battery pack according to claim 1, wherein the electrical connection member (20) is a sheet-like body.

3. A plurality of battery cells (10), each comprising a shell (11), a battery core, and a plurality of terminals (12), wherein a housing space is defined inside the shell (11), the battery core is disposed within the housing space, the shell (11) is provided with at least a first surface (111) and a second surface (112), and the terminals (12) are disposed on the battery core and extend from the first surface (111) of the shell (11), and the plurality of battery cells (10) An electrical connection member (20) is positioned opposite each of the two adjacent first surfaces (111) and is electrically connected to each of the two adjacent terminals (12) so as to provide electrical conductivity between the two adjacent battery cells (10), A heat transfer member configured to transfer heat from the electrical connection member (20) to the second surface (112) Equipped with, The aforementioned electrical connection member (20) is The first connecting piece (21) is such that the orthographic projection of the first connecting piece (21) on the first surface (111) covers the terminal (12), and the first connecting piece (21) is such that A second connecting piece (22) is positioned outside the first connecting piece (21), and the orthographic projection of the second connecting piece (22) on the first surface (111) is spaced apart from the terminal (12), and the second connecting piece (22) is in thermal conductive connection with the heat transfer member, and the second connecting piece (22) and Equipped with, The mounting base (40) is further provided on the side of the second connecting piece (22) that is away from the terminal (12) so as to determine the position of at least a portion of the heat transfer member with respect to the electrical connecting member (20), A battery pack comprising two second connecting pieces (22), each positioned on either side of a first connecting piece (21), and two mounting bases (40) provided in a one-to-one correspondence with the two second connecting pieces (22).

4. A plurality of battery cells (10), each comprising a shell (11), a battery core, and a plurality of terminals (12), wherein a housing space is defined inside the shell (11), the battery core is disposed within the housing space, the shell (11) is provided with at least a first surface (111) and a second surface (112), and the terminals (12) are disposed on the battery core and extend from the first surface (111) of the shell (11), and the plurality of battery cells (10) An electrical connection member (20) is positioned opposite each of the two adjacent first surfaces (111) and is electrically connected to each of the two adjacent terminals (12) so as to provide electrical conductivity between the two adjacent battery cells (10), A heat transfer member configured to transfer heat from the electrical connection member (20) to the second surface (112) Equipped with, The aforementioned electrical connection member (20) is The first connecting piece (21) is such that the orthographic projection of the first connecting piece (21) on the first surface (111) covers the terminal (12), and the first connecting piece (21) is such that A second connecting piece (22) is positioned outside the first connecting piece (21), and the orthographic projection of the second connecting piece (22) on the first surface (111) is spaced apart from the terminal (12), and the second connecting piece (22) is in thermal conductive connection with the heat transfer member, and the second connecting piece (22) and Equipped with, The mounting base (40) is further provided on the side of the second connecting piece (22) that is away from the terminal (12) so as to determine the position of at least a portion of the heat transfer member with respect to the electrical connecting member (20), A battery pack in which a clamping groove (41) is provided on the mounting base (40) on the side away from the terminal (12) for attaching at least a portion of the heat transfer member.

5. A plurality of battery cells (10), each comprising a shell (11), a battery core, and a plurality of terminals (12), wherein a housing space is defined inside the shell (11), the battery core is disposed within the housing space, the shell (11) is provided with at least a first surface (111) and a second surface (112), and the terminals (12) are disposed on the battery core and extend from the first surface (111) of the shell (11), and the plurality of battery cells (10) An electrical connection member (20) is positioned opposite each of the two adjacent first surfaces (111) and is electrically connected to each of the two adjacent terminals (12) so as to provide electrical conductivity between the two adjacent battery cells (10), A heat transfer member configured to transfer heat from the electrical connection member (20) to the second surface (112) Equipped with, The heat transfer member is A heat sink (31) is positioned so that at least a portion of it faces the electrical connection member (20) and is configured to exchange heat with the electrical connection member (20), and the heat sink (31) has a first cooling channel, A cooler having at least a portion of which is thermally conductively connected to the second surface (112), and having a second cooling channel that communicates with the first cooling channel so as to transfer heat from the electrical connecting member (20) to the second surface (112), and A battery pack equipped with these features.

6. The heat transfer member is A heat sink (31) is provided, wherein at least a portion of it is positioned facing the electrical connection member (20) and configured to exchange heat with the electrical connection member (20), and the heat sink (31) has a first cooling channel, The battery pack according to claim 1, wherein the heat sink (31) comprises a plurality of straight pipes (311) and elbow pipes (312) positioned at the ends of the straight pipes (311) to connect adjacent straight pipes (311) to each other.

7. The shell (11) has edges extending along a first direction, a second direction, and a third direction, the first direction and the second direction defining a first plane, the first direction and the third direction defining a second plane, and the second direction and the third direction defining a third plane. The battery pack according to claim 1, wherein 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.

8. The battery pack according to any one of claims 1 to 7, wherein the surface area of ​​the second surface (112) is greater than the surface area of ​​the first surface (111).

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