A battery pack and an electric device

Abstract

Embodiments of the present application provide a battery pack and an electric device. The battery pack comprises: a plurality of single batteries, each single battery comprising two first surfaces arranged away along a first direction and two second surfaces arranged away along a second direction, each single battery having a first pole and a second pole, the first pole being arranged on one of the second surfaces and having a first matching plane coplanar with one of the first surfaces, the second pole being arranged on the other of the second surfaces and having a second matching plane coplanar with the other of the first surfaces; and a thermal management component, the thermal management component being attached to the first surface, the first pole or the second pole of each single battery; and the plurality of single batteries are arranged along the second direction, and the first pole of one single battery is electrically connected to the second pole of another single battery. In the battery pack, the thermal management component has a good cooling effect on the single batteries, which is conducive to improving the working performance and working life of the battery pack.

Description

Technical Field

[0001] This application belongs to the field of new energy technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] Thermal management components are critical parts of a battery pack, responsible for reducing the operating temperature of individual cells. The operating temperature of each cell has a significant impact on the battery pack's lifespan and performance. Therefore, the structural design of thermal management components is of paramount importance.

[0003] However, in existing technologies, the thermal management components of the battery pack are usually located at the bottom or side of the individual cells. The contact area between the thermal management components and the individual cells is limited, resulting in insufficient cooling effect on the individual cells, which greatly restricts the working performance and service life of the battery pack. Utility Model Content

[0004] This application aims to provide a battery pack and an electrical device to solve the problem of insufficient cooling effect of existing battery packs on individual cells.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows:

[0006] In a first aspect, this application discloses a battery pack having a first direction, a second direction, and a third direction that are perpendicular to each other, and the battery pack includes:

[0007] A plurality of individual battery cells, each individual battery cell including two first surfaces disposed opposite to each other along a first direction and two second surfaces disposed opposite to each other along a second direction, one second surface being connected between the two first surfaces, each individual battery cell having a first terminal post and a second terminal post, the first terminal post being disposed on one of the second surfaces and having a first mating plane, the first mating plane being coplanar with one of the first surfaces, the second terminal post being disposed on the other second surface and having a second mating plane, the second mating plane being coplanar with the other first surface;

[0008] And a thermal management component, wherein the thermal management component is attached to the first surface of the single cell, the first terminal post, or the second terminal post;

[0009] The plurality of said individual cells are arranged along the second direction, and in two adjacent individual cells, the first terminal of one individual cell is electrically connected to the second terminal of the other individual cell.

[0010] Secondly, this application also discloses an electrical device, which includes: the battery pack described in any of the above claims.

[0011] In this embodiment, the first and second terminals on the single battery cell are respectively disposed on two opposite second surfaces. This avoids heat concentration caused by placing the first and second terminals on the same side, improving the temperature uniformity of the single battery cell. Since the first terminal is coplanar with one of the first surfaces, and the second terminal is coplanar with the other first surface, the thermal management component can be attached to the first surface and the first or second terminal, respectively, to dissipate heat from the first surface, the first terminal, and the second terminal. Because the thermal management component can directly dissipate heat from the first surface of the single battery cell, as well as the hotter first and second terminals, the cooling effect on the single battery cell is better, which is beneficial to improving the performance and lifespan of the battery pack.

[0012] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0013] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0014] Figure 1 This is an exploded structural diagram of a battery pack according to an embodiment of this application;

[0015] Figure 2 yes Figure 1 The diagram shows a cross-sectional view of the battery pack.

[0016] Figure 3 This is a schematic diagram showing the connection status of the thermal management component and the individual battery cells in the battery pack described in the embodiments of this application;

[0017] Figure 4 yes Figure 3 An enlarged structural diagram of position A shown;

[0018] Figure 5 This is a schematic diagram of the structure of a single battery cell in the battery pack described in the embodiments of this application;

[0019] Figure 6 yes Figure 5 A schematic diagram of the structure of a single cell shown from another angle;

[0020] Figure 7 They are two adjacent Figure 5 The diagram shows the connection status of a single battery cell.

[0021] Figure 8 yes Figure 7An enlarged structural diagram of the connection position of a single battery cell is shown.

[0022] Figure 9 This is a schematic diagram of the structure of the support frame of the battery pack described in the embodiments of this application;

[0023] Figure 10 yes Figure 9 The diagram shows the structure of the support frame and the individual battery cell.

[0024] Figure 11 yes Figure 10 The diagram shows the assembly structure of the support frame, individual battery cells, and thermal management components.

[0025] Figure 12 yes Figure 11 A cross-sectional view of the connection structure shown.

[0026] Figure 13 This is a schematic diagram of the structure of the thermal management component in the battery pack described in the embodiments of this application;

[0027] Figure 14 yes Figure 13 A partial structural schematic diagram of the thermal management component is shown.

[0028] Reference numerals: 1 - Single cell, 11 - First surface, 12 - Second surface, 13 - First terminal, 14 - Second terminal, 15 - Third surface, 16 - Explosion-proof valve, 2 - Thermal management component, 21 - Clearance groove, 22 - Cold plate, 23 - Current collector, 3 - Support frame, 31 - Drainage channel, 32 - Exhaust vent, 33 - Heat insulation component, 34 - Side plate, 35 - Top plate, 4 - Housing, 5 - Top cover, 6 - Bottom plate, 7 - Support component, 8 - Thermal insulation component, Z - First direction, X - Second direction, Y - Third direction. Detailed Implementation

[0029] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0030] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Reference Figure 1 This diagram shows an exploded view of a battery pack according to an embodiment of this application. Figure 2 , showed Figure 1 The schematic diagram of the cross-sectional structure of the battery pack shown is for reference. Figure 3 This diagram illustrates the connection status of the thermal management component and individual cells in the battery pack according to an embodiment of this application. Figure 4 , showed Figure 3 The enlarged structural diagram at position A is shown in the figure. Figure 5 This shows a schematic diagram of the structure of a single battery cell in the battery pack described in an embodiment of this application. (Refer to...) Figure 6 , showed Figure 5 The schematic diagram of the single cell from another angle is shown below. Figure 7 This shows two adjacent Figure 5 The diagram showing the connection status of a single battery cell is provided for reference. Figure 8 , showed Figure 7The enlarged structural diagram of the single-cell battery connection position shown is for reference. Figure 9 The diagram shows a structural schematic of the support frame for the battery pack according to an embodiment of this application. (Refer to...) Figure 10 , showed Figure 9 The structural diagram of the support frame and individual battery shown is for reference. Figure 11 , showed Figure 10 The schematic diagram of the assembly structure of the support frame, individual cells, and thermal management components shown is for reference only. Figure 12 , showed Figure 11 The cross-sectional view of the connection structure shown is for reference only. Figure 13 This diagram illustrates the structure of a thermal management component in a battery pack according to an embodiment of this application. (Refer to...) Figure 14 , showed Figure 13 A partial structural schematic diagram of the thermal management component is shown.

[0034] like Figures 1 to 8 As shown, the battery pack has two perpendicular directions: a first direction Z, a second direction X, and a third direction Y. Specifically, the battery pack may include: multiple individual cells 1, each individual cell 1 may include two first surfaces 11 disposed opposite each other along the first direction Z, and two second surfaces 12 disposed opposite each other along the second direction X. One second surface 12 connects the two first surfaces 11. Each individual cell 1 has a first terminal 13 and a second terminal 14. The first terminal 13 is disposed on one of the second surfaces 12 and has a first mating plane, which is coplanar with one of the first surfaces 11. The second terminal 14 is disposed on the other second surface 12 and has a second mating plane, which is coplanar with the other first surface 11. A thermal management component 2 is also included, which is attached to the first surface 11, the first terminal 13, or the second terminal 14 of the individual cell 1. The multiple individual cells 1 are arranged along the second direction X. In two adjacent individual cells 1, the first terminal 13 of one individual cell 1 is electrically connected to the second terminal 14 of the other individual cell 1.

[0035] In this embodiment, the first terminal 13 and the second terminal 14 on the single battery cell 1 are respectively disposed on two opposite second surfaces 12. This avoids heat concentration caused by placing the first terminal 13 and the second terminal 14 on the same side, thus improving the temperature uniformity of the single battery cell 1. Since the first terminal 13 is coplanar with one of the first surfaces 11 and the second terminal 14 is coplanar with the other first surface 11, the thermal management component 2 can be attached to the first surface 11 and the first terminal 13 or the second terminal 14 respectively to dissipate heat from the first surface 11, the first terminal 13, and the second terminal 14. Because the thermal management component 2 can directly dissipate heat from the first surface 11 of the single battery cell 1, as well as the hotter first terminal 13 and the second terminal 14, the cooling effect on the single battery cell 1 is better, which is beneficial to improving the working performance and service life of the battery pack.

[0036] Specifically, in this embodiment of the application, the first direction Z can be the height direction of the battery pack, the second direction X can be the length direction of the battery pack, and the third direction Y can be the width direction of the battery pack.

[0037] like Figure 1 As shown, the battery pack may further include: a housing 4, which serves as the supporting body for the battery pack. The housing 4 may have a receiving cavity inside, where individual batteries 1 and thermal management components 2 can be placed. The battery pack may also include a top cover 5, which covers the housing 4 and closes the opening of the receiving cavity, making the receiving cavity a sealed space to fully protect the individual batteries 1 and thermal management components 2 inside the receiving cavity.

[0038] Specifically, such as Figure 1 As shown, multiple individual battery cells 131 can be arranged in a row along the second direction X. Figure 5 As shown, the battery cell 1 may include two first surfaces 11 disposed opposite to each other along a first direction Z, and two second surfaces 12 disposed opposite to each other along a second direction X. The single battery cell 1 has a first terminal 13 and a second terminal 14, which can be used to form conductive contact components for the positive and negative electrodes of the single battery cell 1. The first terminal 13 is disposed on one of the second surfaces 12, and the second terminal 14 is disposed on the other second surface 12, with the second mating plane of the second terminal 14 being coplanar with the other first surface 11. Thus, when the thermal management component 2 is attached to the first surface 11 of the single battery cell 1, the thermal management component 2 can correspondingly attach to either the first terminal 13 or the second terminal 14 to achieve heat dissipation for the first terminal 13 and the second terminal 14.

[0039] In practical applications, the first terminal 13 can be one of the positive terminal and the negative terminal, and the second terminal 14 can be the other of the positive terminal and the negative terminal. The specific contents of the first terminal 13 and the second terminal 14 are not limited in the embodiments of this application.

[0040] In this embodiment, by respectively disposing the first electrode 13 and the second electrode 14 on two opposing second surfaces 12, the first electrode 13 and the second electrode 14 can be positioned on different sides of the single cell 1. Compared to the conventional single cell 1 where the first electrode 13 and the second electrode 14 are positioned on the same side, disposing the first electrode 13 and the second electrode 14 on different sides allows for a more uniform distribution of current and temperature within the single cell 1. Moreover, during the charging or discharging process of the single cell 1, high-temperature zones are often formed at the locations of the first electrode 13 and the second electrode 14. Since the thermal management component 2 can not only adhere to the first surface 11 of the single cell 1 but also directly adhere to the first electrode 13 and the second electrode 14, the contact area between the thermal management component 2 and the first electrode 13 and the second electrode 14 can be greatly increased, thereby improving the heat dissipation effect on the first electrode 13 and the second electrode 14.

[0041] In some optional embodiments of this application, the first surface 11 is the surface with the largest area of ​​the single cell 1. Since the first surface 11 of the single cell 1 is directly attached to the thermal management component 2, and the first surface 11 is the surface with the largest area of ​​the single cell 1, the contact area between the thermal management component 2 and the single cell 1 can be maximized, which greatly improves the heat exchange efficiency between the thermal management component 2 and the single cell 1.

[0042] In practical applications, by simultaneously contacting the thermal management component 2 with the first surface 11, the first electrode 13, and the second electrode 14, which have the largest area on the single cell 1, the first surface 11, the first electrode 13, and the second electrode 14 can be cooled at the same time. This can reduce the temperature difference of the single cell 1, thereby improving the thermal management level of the single cell 1 and increasing its service life.

[0043] Optionally, such as Figure 7 and Figure 8 As shown, in two adjacent single cells 1, the first terminal 13 of one single cell 1 is connected to the second terminal 14 of the other single cell 1 along the first direction Z, so as to realize the electrical connection between the two.

[0044] In practical applications, by placing the first terminal 13 and the second terminal 14 on different sides of the individual battery cell 1, it is beneficial for adjacent individual battery cells 1 to overlap their first terminal 13 and second terminal 14. In practical applications, when the first terminal 13 and the second terminal 14 overlap, a high-voltage connection can be achieved between them through laser welding. This not only avoids the traditional busbar connection between the first terminal 13 and the second terminal 14, improving the connection stability between them, but also allows for a more compact arrangement of the individual battery cells 1 within the battery pack, greatly maximizing the utilization of the internal space of the battery pack.

[0045] like Figure 6 As shown, the thickness of the first electrode 13 along the first direction Z is H1, the thickness of the second electrode 14 along the first direction Z is H2, and the thickness of the single cell 1 along the first direction Z is H3, satisfying: H1 + H2 = H3. That is, the sum of the thicknesses of the first electrode 13 and the second electrode 14 in the first direction Z is equal to the thickness of the single cell 1. After the first electrode 13 and the second electrode 14 are connected by an overlap, the thickness at the overlap point of the first electrode 13 and the second electrode 14 can be equal to the thickness of the single cell 1, so that one of the interconnected first electrode 13 and the second electrode 14 can be flush with one first surface 11 of the single cell 1, and the other can be flush with the other first surface 11 of the single cell 1. In this way, the first electrode 13 and the second electrode 14 can each contact a thermal management component 2, so as to further improve the cooling effect of the thermal management component 2 on the first electrode 13 and the second electrode 14.

[0046] It should be noted that, in the embodiments of this application, the sum of the height of the first electrode post 13 and the thickness of the second electrode post 14 being equal to the thickness of the single cell 1 can be understood as the sum of the thickness of the first electrode post 13 and the thickness of the second electrode post 14 being substantially equal to the thickness of the single cell 1, without the need for strict equality.

[0047] In specific applications, a top cover can also be provided on the first terminal 13 and the second terminal 14 of the single cell 1. The surface of the top cover can be sprayed or wrapped with an insulating layer to prevent the first terminal 13 and the second terminal 14 of the same single cell 1 from being directly connected under high voltage, thus preventing a short circuit.

[0048] like Figure 5 As shown, the single cell 1 may further include two third surfaces 15 disposed opposite to each other along a third direction Y; the single cell 1 may further include an explosion-proof valve 16 disposed on at least one third surface 15.

[0049] In practical applications, the explosion-proof valve 16 can serve as a physical pressure relief device for the individual battery 1. When the internal pressure of the individual battery 1 exceeds a set value, the explosion-proof valve 16 will rupture and release gas, preventing the casing from bursting and causing a safety accident. By placing the explosion-proof valve 16 on the third surface 15, it can avoid the second surface 12 where the terminal post is located and the first surface 11 that contacts the thermal management component 2, which is beneficial for the safe management of the individual battery 1 in the event of thermal runaway.

[0050] In some alternative embodiments of this application, such as Figure 1 and Figure 2 As shown, there are multiple thermal management components 2, which are distributed at intervals along the first direction Z. A single battery cell 1 is disposed between two adjacent thermal management components 2 along the first direction Z. The battery pack may also include a support frame 3, which is disposed between two adjacent thermal management components 2 to support the thermal management components 2.

[0051] In practical applications, by placing the individual battery 1 between two adjacent thermal management components 2, the individual battery 1 can be cooled simultaneously from both sides, thereby improving the cooling effect. By setting a support frame 3 between two adjacent thermal management components 2, reliable support for the thermal management components 2 can be achieved, preventing the weight of the thermal management components 2 from directly acting on the individual battery 1 and causing damage.

[0052] In specific applications, the battery pack may also include fasteners, which are connected to the support frame 3, the thermal management component 2 and the housing 4 respectively, so as to reliably connect the support frame 3 and the thermal management component 2 to the housing 4, so as to support the thermal management component 2 through the housing 4, and further avoid the gravity of the thermal management component 2 acting on the individual battery 1 and affecting the service life of the individual battery 1.

[0053] For example, the fastener may include, but is not limited to, at least one of bolts, screws, and studs. This application embodiment does not specifically limit the type of the fastener.

[0054] In some alternative embodiments of this application, such as Figure 5 As shown, the single cell 1 may further include two third surfaces 15 disposed opposite to each other along the third direction Y, and the single cell 1 may further include an explosion-proof valve 16 disposed on the third surface 15. The support frame 3 extends along the second direction X and is connected to one side of the single cell 1 along the third direction Y. Figure 9As shown, the support frame 3 is provided with a drainage channel 31, and an exhaust port 32 is provided on the support frame 3 at a position opposite to the explosion-proof valve 16, and the exhaust port 32 is connected to the drainage channel 31. In the event of thermal runaway of the explosion-proof valve 16, the high-temperature gas mixture ejected from the explosion-proof valve 16 can enter the drainage channel 31 of the support frame 3 through the exhaust port 32 and be discharged through the drainage channel 31. That is, the support frame 3 can also provide an effective discharge path for the high-temperature gas mixture generated by the explosion-proof valve 16 in the event of thermal runaway, avoiding thermal propagation.

[0055] Optionally, such as Figure 9 As shown, the battery pack may also include a heat insulation component 33, which covers the vent 32. The heat insulation component 33 can be used for heat insulation to prevent the high-temperature gas mixture ejected by the single cell 1 that has thermal runaway from radiating to the single cell 1 on the opposite side, so as to prevent heat spread.

[0056] In specific applications, the heat insulation component 33 can be made of mica paper, which can be pasted onto the support frame 3. The side of the mica paper away from the explosion-proof valve 16 can be sprayed with heat insulation material to achieve the heat insulation function. Optionally, the heat insulation component 33 can also be heat insulation cotton, etc. The implementation method of the heat insulation component 33 in this application embodiment is not limited.

[0057] like Figure 9 As shown, the support frame 3 may specifically include: two side plates 34 and two top plates 35; wherein, the two side plates 34 are spaced apart along the third direction Y, and the two top plates 35 are connected to the two side plates 34 on both sides along the first direction Z, the two side plates 34 and the two top plates 35 enclose to form a drainage channel 31, and the two top plates 35 and the side plates 34 away from the drainage channel 31 enclose to form an open snap-fit ​​groove, which snaps onto the edge of the single cell 1 along the third direction Y; the top plate 35 is connected to the thermal management component 2.

[0058] In practical applications, by setting the support frame 3 into an "I"-shaped cross-section, on the one hand, only the two side plates 34 need to be placed between two adjacent single cells 1 along the third direction Y, which can make the space occupied by the support frame 3 in the third direction Y smaller. Moreover, the two top plates 35 set along the first direction Z can be used to connect with the thermal management component 2, which can realize reliable support for the thermal management component 2 and realize a reliable connection between the two.

[0059] Optionally, such as Figure 11As shown, the thermal management component 2 is also provided with an avoidance groove 21 at a position opposite to the top plate 35. The top plate 35 is embedded in the avoidance groove 21 so that the support frame 3 and the thermal management component 2 can share space in the first direction Z, thereby reducing the space occupied by the support frame 3 alone and improving the compactness of the space inside the battery pack.

[0060] like Figure 13 and Figure 14 As shown, the thermal management component 2 may have current collectors 23 at both ends along the second direction X, and the clearance groove 21 may be provided on the current collectors 23.

[0061] It should be noted that in practical applications, the thermal management component 2 can be a modular structure or an integral structure. This application embodiment does not specifically limit the structure of the thermal management component 2.

[0062] like Figure 1 As shown, the battery pack may further include a base plate 6, a support member 7, and an insulation member 8. Specifically, the base plate 6 can be located at the bottom of the housing 4, and the individual battery 1 can be connected to the base plate 6, which provides bottom support for the individual battery 1. The support member 7 can be located between the base plate 6 and the individual battery 1, and can be a flexible member to provide flexible buffering between the individual battery 1 and the base plate 6. The insulation member 8 can be located between the individual battery 1 and the top cover 5 to improve the insulation effect of the battery pack.

[0063] In summary, the battery pack described in the embodiments of this application may include at least the following advantages:

[0064] In this embodiment, the first and second terminals on the single battery cell are respectively disposed on two opposite second surfaces. This avoids heat concentration caused by placing the first and second terminals on the same side, improving the temperature uniformity of the single battery cell. Since the first terminal is coplanar with one of the first surfaces, and the second terminal is coplanar with the other first surface, the thermal management component can be attached to the first surface and the first or second terminal, respectively, to dissipate heat from the first surface, the first terminal, and the second terminal. Because the thermal management component can directly dissipate heat from the first surface of the single battery cell, as well as the hotter first and second terminals, the cooling effect on the single battery cell is better, which is beneficial to improving the performance and lifespan of the battery pack.

[0065] This application also provides an electrical device, which may specifically include the battery pack described in any of the above embodiments. The battery pack can be used to provide power to the electrical device. Specifically, the electrical device may include, but is not limited to, vehicles, aircraft, and other devices that require power. This application does not specifically limit the specific content of the electrical device.

[0066] It should be noted that in this embodiment, the structure of the battery pack in the electrical device is the same as that of the battery pack described in any of the above embodiments, and its beneficial effects are also similar, so it will not be described in detail here.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack having a first direction (Z), a second direction (X), and a third direction (Y) that are perpendicular to each other, characterized in that, The battery pack includes: Multiple single-cell batteries (1), each single-cell battery (1) includes two first surfaces (11) disposed opposite to each other along a first direction (Z), and two second surfaces (12) disposed opposite to each other along a second direction (X), one second surface (12) being connected between the two first surfaces (11), each single-cell battery (1) having a first terminal post (13) and a second terminal post (14), the first terminal post (13) being disposed on one of the second surfaces (12), and the first terminal post (13) having a first mating plane, the first mating plane being coplanar with one of the first surfaces (11), the second terminal post (14) being disposed on the other second surface (12), and the second terminal post (14) having a second mating plane, the second mating plane being coplanar with the other first surface (11); And a thermal management component (2), which is attached to the first surface (11), the first terminal (13), or the second terminal (14) of the single cell (1); Multiple individual cells (1) are arranged along the second direction (X), and in two adjacent individual cells (1), the first terminal (13) of one individual cell (1) is electrically connected to the second terminal (14) of the other individual cell (1).

2. The battery pack according to claim 1, characterized in that, In two adjacent single cells (1), the first terminal (13) of one single cell (1) overlaps with the second terminal (14) of the other single cell (1) along the first direction (Z).

3. The battery pack according to claim 2, characterized in that, The thickness of the first electrode post (13) along the first direction (Z) is H1, the thickness of the second electrode post (14) along the first direction (Z) is H2, and the thickness of the single cell (1) along the first direction (Z) is H3, satisfying: H1 + H2 = H3.

4. The battery pack according to claim 1, characterized in that, The number of thermal management components (2) is multiple, and the multiple thermal management components (2) are distributed at intervals along the first direction (Z). The single cell (1) is disposed between two adjacent thermal management components (2) along the first direction (Z). The battery pack further includes a support frame (3), which is disposed between two adjacent thermal management components (2) to support the thermal management components (2).

5. The battery pack according to claim 4, characterized in that, The single cell (1) also includes two third surfaces (15) disposed opposite to each other along the third direction (Y), and the single cell (1) also includes an explosion-proof valve (16) disposed on the third surface (15); The support frame (3) extends along the second direction (X) and is connected to one side of the single cell (1) along the third direction (Y); The support frame (3) is provided with a drainage channel (31), and an exhaust hole (32) is provided on the support frame (3) at a position opposite to the explosion-proof valve (16). The exhaust hole (32) is connected to the drainage channel (31).

6. The battery pack according to claim 5, characterized in that, The battery pack also includes a heat insulation element (33) that covers the vent (32).

7. The battery pack according to claim 5, characterized in that, The supporting frame (3) includes: two side plates (34) and two top plates (35); wherein, Two side plates (34) are spaced apart along the third direction (Y), and two top plates (35) are connected to the two side plates (34) on both sides along the first direction (Z). The two side plates (34) and the two top plates (35) enclose to form the drainage channel (31). The two top plates (35) and the side plates (34) away from the drainage channel (31) enclose to form an open snap-fit ​​groove, which snaps into the edge of the single cell (1) along the third direction (Y). The top plate (35) is connected to the thermal management component (2).

8. The battery pack according to claim 7, characterized in that, The thermal management component (2) is also provided with a clearance groove (21) at a position opposite to the top plate (35), and the top plate (35) is embedded in the clearance groove (21).

9. The battery pack according to claim 1, characterized in that, The first surface (11) is the surface with the largest area of ​​the single cell (1).

10. An electrical appliance, characterized in that, The electrical equipment includes: the battery pack according to any one of claims 1 to 9.

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