Battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery pack and electric equipment, the battery pack comprises a battery cell and a sampling assembly, the battery cell comprises a battery cell body and a pole, the pole is connected to the battery cell body, and the sampling assembly comprises a busbar and an insulating part which are connected with each other; wherein the busbar comprises a first surface and a second surface which are oppositely arranged along a first direction, the first surface is arranged close to the battery cell, and the insulating part is connected to the second surface to bear the busbar; the busbar is electrically connected to the pole. According to the battery pack provided by the embodiment of the invention, the insulating part realizes a bearing function on the busbar, meanwhile, the structural design of the sampling assembly is simplified, the improvement of the space utilization rate of the battery pack is facilitated, and meanwhile, as the insulating part is only arranged on one side of the busbar, the material cost is also saved, and the economical efficiency of a product is improved.

Description

Technical Field

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

[0002] New energy battery packs have been widely used in various fields in recent years due to their high energy density and power density. To ensure the reliability of the battery pack, sampling components are installed to collect various operating parameters of the battery cells, such as voltage and temperature.

[0003] In related technologies, the sampling component is equipped with a double-layer hot-pressed film structure to support the busbar. This double-layer hot-pressed film support structure has an adverse effect on the space optimization of the battery pack on the one hand, and increases material costs and reduces the economic efficiency of the product on the other hand. Utility Model Content

[0004] This application aims to provide a battery pack and electrical device to solve the problems of poor space optimization and high material cost of sampling components in existing battery packs.

[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 intersecting first, second, and third directions. The battery pack includes: battery cells and a sampling assembly. The battery cell includes a cell body and terminals, the terminals being connected to the cell body and protruding from the cell body along the first direction. The sampling assembly includes interconnected busbars and insulating components.

[0007] The busbar includes a first surface and a second surface disposed opposite to each other along the first direction, the first surface being disposed close to the battery cell, and the insulating member being connected to the second surface to support the busbar;

[0008] The busbar is electrically connected to the terminal post.

[0009] Optionally, the busbar is welded to the pole post, and the insulating component has a welding clearance hole, which is disposed opposite to the pole post along the first direction.

[0010] Optionally, the electrode post has an end face that is located away from the cell body along the first direction, and the first surface covers the end face of the electrode post and is electrically connected to the end face.

[0011] Optionally, the busbar is provided with a first through hole, the first through hole and the pole post are disposed opposite to each other along the first direction, and the pole post is at least partially located in the first through hole.

[0012] Optionally, the pole includes a main body and a boss. The boss is connected to the main body and protrudes from the main body along the first direction. The boss passes through the first through hole, and the main body is welded to the busbar to form a weld mark. The weld mark surrounds the first through hole.

[0013] Optionally, along the first direction, the pole does not protrude from the second surface.

[0014] Optionally, the insulating element includes at least one of polyester film, polyimide film, and polycarbonate film.

[0015] Optionally, the sampling component further includes a sampling line connected to an insulating component, the sampling line being provided with sampling terminals, and the sampling terminals being connected between the busbar and the insulating component.

[0016] Optionally, the busbar and the acquisition line are both bonded and fixed to the insulating component.

[0017] Secondly, this application also discloses an electrical device, including a battery pack as described above, the battery pack being used to supply power to the electrical device.

[0018] In this embodiment, the busbar includes a first surface and a second surface that are opposite to each other. The first surface is located close to the battery cell, while the second surface is located on the side of the busbar away from the battery cell. An insulating component is connected to the second surface to support the busbar from the side away from the battery cell, thereby achieving single-sided support of the busbar. Furthermore, the insulating component can be placed only on the side of the busbar away from the battery cell, avoiding interference between the insulating component and the electrical connection between the busbar and the terminal, reducing manufacturing processes and costs. This single-sided insulating component structure simplifies the structural design of the sampling component while achieving the function of supporting the busbar, improving the space utilization of the battery pack. Simultaneously, since the insulating component is only placed on one side of the busbar, it also saves material costs and improves the product's economics.

[0019] Additional aspects and advantages of this application 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 this application. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a top view of the battery pack in an embodiment of this application;

[0022] Figure 2 This is an exploded schematic diagram of a battery pack in one embodiment of this application;

[0023] Figure 3 This is a front view of the battery pack in one embodiment of this application;

[0024] Figure 4 yes Figure 3 Enlarged diagram of section A in the middle;

[0025] Figure 5 This is a simplified structural diagram of the battery pack in one embodiment of this application;

[0026] Figure 6 yes Figure 5 An explosion diagram;

[0027] Figure 7 This is an exploded schematic diagram of the battery pack in another embodiment of this application;

[0028] Figure 8 This is a front view of the battery pack in another embodiment of this application;

[0029] Figure 9 yes Figure 8 Enlarged schematic diagram of section B in the middle;

[0030] Figure 10 This is a simplified structural diagram of the battery pack in another embodiment of this application;

[0031] Figure 11 This is a simplified structural diagram of the battery pack in another embodiment of this application;

[0032] Figure 12 yes Figure 10 and Figure 11 An explosion diagram.

[0033] Reference numerals: 10 - battery cell, 11 - battery cell body, 12 - electrode post, 121 - end face, 122 - side wall, 123 - main body, 124 - boss, 20 - sampling assembly, 21 - busbar, 211 - first surface, 212 - second surface, 213 - first through hole, 22 - acquisition line, 221 - acquisition terminal, 23 - insulating component, 231 - welding clearance hole, X - first direction, Y - second direction, Z - third direction. Detailed Implementation

[0034] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated 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 application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] 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 application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0036] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "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 based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not 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 application.

[0037] In this application, the term "parallel" includes not only absolute parallelism but also approximate parallelism as commonly understood in engineering. For example, "parallel" refers to the angle between two lines, a line and a surface, or a surface, where the angle is between -1° and 1°. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximate perpendicularity as commonly understood in engineering. For example, "perpendicular" refers to the angle between two lines, a line and a surface, or a surface, where the angle is between 89° and 91°. Equal distances or equal angles include not only absolute equality but also approximate equality as commonly understood in engineering, meaning there may be a certain degree of error, such as a tolerance range of -1% to 1%.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] New energy battery packs have been widely used in various fields in recent years due to their high energy density and power density. To ensure the reliability of the battery pack, sampling components are installed to collect various operating parameters of the cells, such as voltage and temperature. In related technologies, the sampling components use a double-layer hot-pressed film structure to support the busbar. This double-layer hot-pressed film support structure has two drawbacks: firstly, it negatively impacts the space optimization of the battery pack; secondly, it increases material costs and reduces the product's economic efficiency.

[0040] In view of the above problems, this application discloses a battery pack. The battery pack provided according to the embodiments of this application simplifies the structural design of the sampling component, which is conducive to improving the space utilization of the battery pack, while also saving material costs and improving the economic efficiency of the product.

[0041] The battery pack provided in the embodiments of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments. In the embodiments of this application, the battery pack has a first direction X, a second direction Y and a third direction Z that intersect each other. Specifically, in the embodiments of this application, the first direction is the height direction of the battery cell, and the second direction and the third direction are one of the width direction and length direction of the battery cell, respectively.

[0042] Reference Figures 1 to 12 Figure 1 shows a schematic diagram of the battery pack structure in an embodiment of this application. As shown in the figure, the battery pack disclosed in this application may specifically include: a battery cell 10 and a sampling component 20. The battery cell 10 includes a battery cell body 11 and a terminal post 12. The terminal post 12 is connected to the battery cell body 11 and protrudes from the battery cell body 11 along a first direction X. The sampling component 20 includes a busbar 21 and an insulator 23 connected to each other. The busbar 21 includes a first surface 211 and a second surface 212 disposed opposite to each other along the first direction X. The first surface 211 is disposed close to the battery cell 10. The insulator 23 is connected to the second surface 212 to support the busbar 21. The busbar 21 is electrically connected to the terminal post 12. The insulator 23 connected to the second surface 212 of the busbar 21 can provide support and insulation for the busbar 21, effectively ensuring the connection strength and connection stability between the busbar 21 and the terminal post 12.

[0043] Specifically, the battery pack may include multiple battery cells 10, which are arranged in an array along a second direction Y and / or a third direction Z. Correspondingly, there are multiple busbars 21, and one busbar 21 can be used to connect two adjacent battery cells 10 along the second direction Y, thereby realizing series or parallel connection between battery cells 10 and further realizing current transmission between battery cells 10. Further, the terminal post 12 is disposed on the top of the battery cell 10, and the multiple busbars 21 used to realize electrical connection between battery cells 10 are also arranged in an array on the top of the battery cell 10. The insulating member 23 is connected to the side of the busbar 21 opposite to the battery cell 10 along the first direction X.

[0044] In this embodiment, the busbar 21 includes a first surface 211 and a second surface 212 that are opposite to each other. The first surface 211 is located close to the battery cell 10, while the second surface 212 is located on the side of the busbar 21 away from the battery cell 10. An insulating member 23 is connected to the second surface 212 to support the busbar 21 from the side of the busbar 21 away from the battery cell 10, thereby achieving a single-sided support function for the busbar 21. This single-sided insulating member 23 structure simplifies the structural design of the sampling component 20 while achieving the support function for the busbar 21, which is beneficial for improving the space utilization of the battery pack. Furthermore, since the insulating member 23 is only located on one side of the busbar 21, it also saves material costs and improves the economic efficiency of the product.

[0045] Optionally, the sampling component 20 further includes a sampling line 22 connected to the insulator 23. The sampling line 22 is provided with a sampling terminal 221, which is connected between the busbar 21 and the insulator 23. Specifically, the sampling terminal 221 is connected to the sampling line 22, and the sampling line 22 is connected to the battery cell 10 or other components that need to be monitored in the battery pack to achieve signal transmission. In some cases, the sampling terminal 221 can also convert analog signals into digital signals to facilitate compatibility with the battery pack management system. The sampling terminal 221 is connected between the busbar 21 and the insulator 23, that is, the sampling terminal 221 is connected to the busbar 21 and the insulator 23 on both sides along the first direction X, respectively, to ensure the reliability of the electrical connection between the sampling line and the battery cell 10 and avoid signal transmission failure due to poor contact or looseness. Through the sampling terminal 221, the sampling line can collect operating information such as voltage, current, and temperature in the battery cell 10, thereby providing a basis for monitoring and management of the battery pack management system. In addition, a fuse can be installed on the acquisition line 22. When the current in the acquisition line 22 is too high, the fuse can melt and cut off the current, ensuring the safety of the battery pack.

[0046] It should be noted that, in practical applications, the acquisition line 22 may include at least one of flexible printed circuit (FPC), flexible flat cable (FFC), flexible die-cutting circuit (FDC), or sampling harness. This application does not impose specific limitations on this, and those skilled in the art can make flexible selections according to actual needs.

[0047] Optionally, the busbar 21 and the acquisition line 22 are both bonded and fixed to the insulating component 23, thereby improving the overall structure and simplifying the production process. Specifically, the busbar 21 and the acquisition line 22 are both formed by hot pressing with the insulating component 23.

[0048] In this embodiment, the insulating component 23 is a hot-pressed film, which is connected to the side of the busbar 21 facing away from the battery cell 10 along the first direction X. In practical applications, the hot-pressed film, the acquisition line 22, and the busbar 21 can be hot-pressed into an integral structure using a hot-pressing device, and then the whole structure can be placed on top of the battery cell 10, so that the busbar 21 is positioned opposite to and connected to the terminal post 12 of the battery cell 10. This thermo-pressing integrated molding process allows the insulation component 23, the data acquisition line 22, and the busbar 21 to be fully assembled and integrated in a single process, which helps to shorten the production cycle and improve production efficiency. The connection between the components no longer requires additional assembly or bonding steps, thereby reducing the risk of loosening due to assembly errors or material aging, and ensuring the long-term stability and reliability of the internal circuit of the battery pack. In addition, under this thermo-pressing integrated molding method, the thermo-pressing film, the data acquisition line 22, and the busbar 21 form a tightly integrated structure, saving assembly gaps and providing more layout options for the internal space of the battery pack. Alternatively, by reducing the volume of the sampling component 20, the overall size and weight of the battery pack can be further reduced, which helps to improve the range of the electrical equipment.

[0049] Furthermore, the busbar 21 is welded to the terminal post 12. The insulating component 23 has a welding clearance hole 231. The welding clearance hole 231 and the terminal post 12 are arranged opposite each other along the first direction X. The arrangement of the welding clearance hole 231 provides the necessary space for the welding operation, so that the welding process can be carried out smoothly and the welding efficiency is improved. The welding clearance hole 231 and the terminal post 12 are arranged opposite each other along the first direction X, which also plays a role in the initial positioning of the welding operation, making the welding connection between the busbar 21 and the terminal post 12 more precise, thereby ensuring the reliability of the electrical connection between the busbar 21 and the terminal post 12.

[0050] In addition, the busbar 21 and the terminal post 12 can also be electrically connected by bolts, crimping, etc. In this way, the insulating part 23 does not need to be opened with welding clearance hole 231. However, it should be noted that when the busbar 21 and the terminal post 12 are welded together, the connection strength between the busbar 21 and the terminal post 12 is stronger, and the battery pack sampling component 20 is more reliable in collecting the status information of the cell 10.

[0051] In one optional embodiment of this application, the electrode post 12 has an end face 121, which is located away from the cell body 11 along a first direction X. The first surface 211 covers the end face 121 of the electrode post 12 and is electrically connected to the end face 121. In this way, the connection area between the busbar 21 and the end face 121 of the electrode post 12 is increased, thus ensuring the electrical connection strength between the busbar 21 and the electrode post 12.

[0052] Specifically, such as Figure 5 and Figure 6 As shown, end face 121 is located at the top of pole post 12. End face 121 has a planar structure. Busbar 21 is located at the top of end face 121. The first surface 211 of busbar 21 also has a planar structure. The welding clearance hole 231 on the insulating component 23 is arranged opposite to pole post 12 along the first direction X. During welding, the welding tool can pass through the welding clearance hole 231 and approach the second surface 212 of busbar 21, and the welding operation starts from the second surface 212 until the first surface 211 is connected to pole post 12. Since the first surface 211 of busbar 21 and end face 121 of pole post 12 are both planar structures, the connection area between them is larger. Pole post 12 can also provide a certain support for busbar 21, thereby ensuring the structural stability of busbar 21 during long-term use of the battery pack, thus ensuring the service life of sampling component 20 and ensuring the sampling reliability of the battery pack.

[0053] Reference Figures 7 to 12 The present application shows some other optional embodiments. In some other optional embodiments, the bus 21 is provided with a first through hole 213, the first through hole 213 is disposed opposite to the pole post 12 along a first direction X, and the pole post 12 is at least partially located in the first through hole 213.

[0054] like Figures 10 to 12 As shown, the busbar 21 has a first through-hole 213 positioned opposite the first terminal 12. The terminal 12 of the battery cell 10 can pass through the busbar 21 via the first through-hole 213. In this structure, the busbar 21 does not occupy the space of the battery pack along the first direction X separately, but shares the space of the battery cell 10 along the first direction X with the terminal 12, reducing unnecessary stacking, thereby helping to reduce the height of the battery pack and improve the energy density of the battery pack. In addition, since the terminal 12 is at least partially located within the first through-hole 213, the first through-hole 213 can also provide a limit to the terminal 12 along the second direction Y or the third direction Z, improving the motion consistency between the sampling component 20 and the battery cell 10, and reducing the risk of connection failure due to vibration or external force.

[0055] In practical applications, conductive material can be filled into the first through hole 213 or welding or other connection methods can be used to further ensure that the electrical connection between the busbar 21 and the terminal post 12 is firm and has good conductivity, so that the battery pack can maintain a stable current output and extend the service life of the battery pack.

[0056] Optionally, the pole post 12 has a side wall 122 arranged circumferentially, and the first through hole 213 has a hole wall that is connected to the side wall 122 so that the busbar 21 is electrically connected to the pole post 12. The connection between the hole wall and the side wall 122 ensures a tighter and more reliable electrical connection between the busbar 21 and the pole post 12. In practical applications, the hole wall and the side wall 122 can be welded to achieve the electrical connection between the busbar 21 and the pole post 12.

[0057] Optionally, the pole post 12 has a cylindrical structure, the side wall 122 is the outer surface along the circumference of the pole post 12, and the first through hole 213 is a circular through hole that matches the diameter of the pole post 12. The first through hole 213 matching the diameter of the pole post 12 means that the first through hole 213 can ensure that the pole post 12 can pass through, and when the hole wall and the side wall 122 are connected, the connection strength between them can be guaranteed. This avoids the problem of poor connection stability caused by the pole post 12 not being able to pass through due to the hole diameter of the first through hole 213 being too small, or the gap between the hole wall of the busbar 21 and the side wall 122 of the pole post 12 being too large due to the hole diameter of the first through hole 213 being too large.

[0058] In some embodiments, the pole post 12 is welded to the busbar 21 to form a solder mark, which surrounds the first through hole 213. This arrangement can reduce the height of the pole post 12 after it is connected to the busbar 21, and at the same time, it can weld and fix the pole post 12 to the busbar 21 around the first through hole 213, thereby improving the connection reliability of the pole post 12 and the busbar 21.

[0059] Specifically, such as Figure 9 As shown, the electrode post 12 includes a main body 123 and a boss 124. The main body 123 is disposed near and connected to the cell body 11. The boss 124 is connected to the main body 123 and protrudes from the main body 123 along the first direction X. The boss 124 passes through the first through hole 213, and the main body 123 is welded and fixed to the busbar 21 to form a solder mark (not shown in the figure). The solder mark surrounds the first through hole 213. In practical applications, welding equipment passes through the insulating component 23 to perform welding operations on the busbar 21 and the main body 123 of the electrode post 12.

[0060] Optionally, along the first direction X, the terminal post 12 does not protrude from the second surface 212, thereby reducing the risk of physical damage to the battery pack during assembly, transportation and use.

[0061] like Figure 10 As shown in the embodiment of this application, the electrode post 12 is at least partially located within the first through hole 213, and the end face 121 of the electrode post 12 is coplanar with the second surface 212 of the busbar 21. It should be noted that... Figure 10In the original design, to clearly show the positional relationships between the components of the sampling assembly 20, the thickness of each component was increased, and the connection between the insulating component 23 and the busbar 21 was not explicitly shown. In practical applications, the thickness of the acquisition line 22 is very small, and the hot-pressing film is not flexible. During the hot-pressing process, the hot-pressing film can deform and connect the acquisition line 22 and the busbar 21 to form a single integrated structure, such as... Figure 10 There is no location for the acquisition terminal 221 on the left side, and the hot-pressing film is actually connected to the busbar 21. In this structure, the electrode post 12 does not protrude from the second surface 212, which avoids the electrode post 12 exerting an upward force on the hot-pressing film, thereby ensuring the structural stability of the hot-pressing film. It also ensures that the overall structure remains within a small size in the first direction X.

[0062] Optionally, the insulating element 23 includes at least one of polyester film, polyimide film, and polycarbonate film. This application embodiment does not specifically limit this, and those skilled in the art can freely and flexibly choose in practical applications.

[0063] It should be noted that, from a material performance perspective, polyester film (PET), polyimide film (PI), and polycarbonate film (PC) all possess excellent insulation properties and electrical stability. Therefore, when these types of films are used as heat-pressed films in the sampling assembly 20, they can effectively isolate the current between the busbar 21 and other parts of the battery pack, preventing short-circuit risks and ensuring the safe operation of the battery pack. Furthermore, these materials also have high mechanical strength and heat resistance, maintaining stable performance in harsh working environments and extending the battery pack's lifespan.

[0064] In summary, the battery pack provided in this application embodiment may include at least the following advantages:

[0065] In this embodiment, the busbar 21 includes a first surface 211 and a second surface 212 that are opposite to each other. The first surface 211 is located close to the battery cell 10, while the second surface 212 is located on the side of the busbar 21 away from the battery cell 10. An insulating member 23 is connected to the second surface 212 to support the busbar 21 from the side of the busbar 21 away from the battery cell 10, thereby achieving a single-sided support function for the busbar 21. This single-sided insulating member 23 structure simplifies the structural design of the sampling component 20 while achieving the support function for the busbar 21, which is beneficial for improving the space utilization of the battery pack. Furthermore, since the insulating member 23 is only located on one side of the busbar 21, it also saves material costs and improves the economic efficiency of the product.

[0066] This application embodiment also provides an electrical device, including a battery pack as described above, the battery pack being used to supply power to the electrical device.

[0067] The electrical equipment in this application embodiment can be a vehicle, electronic device, energy storage system, drone, etc. When the battery pack in this application embodiment is applied to the electrical equipment, the sampling component 20 in the battery pack has a simpler structure and lower material cost. The structural design can improve the space utilization of the battery pack, thereby reducing the size and weight of the electrical equipment and reducing production costs. At the same time, since the sampling component 20 has high reliability, the battery pack management system can monitor and manage the battery pack more effectively, optimize the battery life of the electrical equipment, and help improve the user's experience of using the electrical equipment.

[0068] 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 this application. 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.

[0069] Although embodiments of this application 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 this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack having intersecting first directions (X), second directions (Y), and a third direction (Z), characterized in that, include: The battery cell (10) and sampling assembly (20) are provided. The battery cell (10) includes a cell body (11) and a terminal (12). The terminal (12) is connected to the cell body (11) and protrudes from the cell body (11) along the first direction (X). The sampling assembly (20) includes a busbar (21) and an insulating element (23) connected to each other. The busbar (21) includes a first surface (211) and a second surface (212) disposed opposite to each other along the first direction (X), the first surface (211) being disposed close to the battery cell (10), and the insulating member (23) being connected to the second surface (212) to support the busbar (21); The busbar (21) is electrically connected to the pole (12).

2. The battery pack according to claim 1, characterized in that, The busbar (21) is welded to the pole (12), and the insulating part (23) is provided with a welding clearance hole (231). The welding clearance hole (231) and the pole (12) are arranged opposite to each other along the first direction (X).

3. The battery pack according to claim 1, characterized in that, The pole post (12) has an end face (121) that is away from the cell body (11) along the first direction (X), and the first surface (211) covers the end face (121) of the pole post (12) and is electrically connected to the end face (121).

4. The battery pack according to claim 1, characterized in that, The busbar (21) is provided with a first through hole (213), the first through hole (213) and the pole post (12) are disposed opposite to each other along the first direction (X), and the pole post (12) is at least partially located in the first through hole (213).

5. The battery pack according to claim 4, characterized in that, The pole post (12) includes a main body (123) and a boss (124). The boss (124) is connected to the main body (123) and protrudes from the main body (123) along the first direction (X). The boss (124) passes through the first through hole (213). The main body (123) is welded and fixed to the busbar (21) to form a weld mark. The weld mark surrounds the first through hole (213).

6. The battery pack according to claim 4, characterized in that, Along the first direction (X), the pole post (12) does not protrude from the second surface (212).

7. The battery pack according to claim 1, characterized in that, The insulating component (23) includes at least one of polyester film, polyimide film, and polycarbonate film.

8. The battery pack according to claim 1, characterized in that, The sampling component (20) further includes a sampling line (22), which is connected to the insulating component (23). The sampling line (22) is provided with a sampling terminal (221), which is connected between the busbar (21) and the insulating component (23).

9. The battery pack according to claim 8, characterized in that, The busbar (21) and the acquisition line (22) are both bonded and fixed to the insulating component (23).

10. An electrical appliance, characterized in that, Includes a battery pack as described in any one of claims 1 to 9, the battery pack being used to power the electrical equipment.

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