Battery pack and electric equipment

Abstract

The invention discloses a battery pack and electric equipment, the battery pack has a circumferential side direction and an axial direction which are intersected, and the battery pack comprises an accommodating part which is provided with an accommodating space; the plurality of single batteries are annularly stacked in the accommodating space along the circumferential direction, and the opposite surfaces of the adjacent single batteries along the circumferential direction are in contact with each other; wherein the accommodating part is provided with a side wall arranged along the peripheral direction, and the side wall is arranged outside the plurality of single batteries in a surrounding manner and is in contact with the exteriors, positioned in the peripheral direction, of the plurality of single batteries. As the single batteries are annularly arranged, the expansive force is uniformly dispersed through the annular side wall, and finally, the expansive force borne by each single battery in the whole battery pack system tends to be consistent, so that the charge-discharge performance of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the technical field of secondary batteries, and in particular to a battery pack and an electrical device. Background Art

[0002] Multiple single cells are electrically connected in series or in parallel and placed in a battery box, and a battery management system, cooling system, etc. are integrated to finally form a battery pack.

[0003] In the existing related technology, multiple square single cells are generally stacked and arranged in a straight line, and the large surfaces of adjacent single cells are in contact with each other. When the single cells expand due to charging and discharging, the expansion force generated by this battery pack design is transmitted along a straight line.

[0004] The above setting will cause the expansion force of the single cells near the two ends to work on the battery pack shell, causing the battery pack shell to deform, thereby partially releasing the expansion force of the single cells near the two ends. The single cells closer to the middle position are difficult to release the expansion force due to battery deformation and other reasons, resulting in different expansion forces on the single cells at different positions, resulting in inconsistent force on the single cells at different positions, affecting the working performance and service life of the battery pack. Summary of the invention

[0005] The present application provides a battery pack and an electrical device to solve the technical problem in the current related technology that the stress state consistency of a single battery during charging and discharging is poor, which affects the service life and working performance of the battery pack.

[0006] In a first aspect, the present application discloses a battery pack having an intersecting circumferential direction and an axial direction, comprising: a receiving component having a receiving space;

[0007] A plurality of single cells, wherein the plurality of single cells are stacked in a ring shape along the circumferential direction in the accommodation space, and opposite sides of the adjacent single cells along the circumferential direction are in contact with each other;

[0008] The accommodating component has a side wall arranged along the circumferential direction, and the side wall is arranged outside the plurality of single batteries and in contact with the outside of the plurality of single batteries located in the circumferential direction.

[0009] To implement the above technical solution, since the single cells are arranged in a ring shape, the expansion force generated by the single cells is mainly transmitted between the single cells, and the remaining expansion force will evenly work on the containing component to cause the containing component to deform or tend to deform, that is, the expansion force is evenly dispersed through the ring-shaped side wall, and finally the expansion force applied to each single cell in the entire battery pack system tends to be consistent, reducing the force difference generated by single cells in different positions when subjected to the expansion force, thereby improving the charge and discharge performance of the battery pack.

[0010] As one of the optional embodiments of this solution, the plurality of single cells are arranged in a circular ring shape.

[0011] The implementation of the above technical solution further makes the stress conditions between the single cells tend to be consistent, ensuring the consistency of the performance of the single cells.

[0012] As one of the optional embodiments of the present scheme, each of the single cells has two first side surfaces close to other single cells, the two first side surfaces are inclined at an angle, the distance between the two first side surfaces gradually decreases toward the center of the circumferential direction, and the first side surfaces of the single cells adjacent to each other along the circumferential direction that are in contact with each other are parallel to each other.

[0013] To implement the above technical solution, since the first side surfaces of two adjacent single cells that are in contact with each other are parallel, combined with the inclined design of the first side surfaces, it can be ensured that the abutment force can be transmitted along the circumferential direction in a relatively standardized manner, so that the expansion force is transmitted more evenly in the circumferential direction, which is beneficial to ensuring the consistency of the force state of each single cell.

[0014] As one of the optional embodiments of the present solution, the battery pack also includes a fixing column extending along the axial direction, the fixing column is arranged at one end of the plurality of single cells facing away from the side wall, the plurality of single cells are arranged in a circular ring shape around the fixing column, and one end of the single cell close to the fixing column is arranged in contact with the outer side surface of the fixing column.

[0015] As one of the optional embodiments of the present solution, a mounting groove is provided on the fixing column along the axial direction.

[0016] To implement the above technical solution, the fixing column mainly supports and isolates the single cells. Only the first side surfaces of the single cells are in contact with each other, so that the expansion force is transmitted along the circumferential direction, and the single cells are prevented from making contact in other directions, thereby preventing the expansion force from being transmitted in other directions. The expansion force on the single cells is standardized, and the installation groove is provided in the middle of the fixing column to facilitate the installation of electrical components or cooling components, etc., and can also reduce the weight of the battery pack, which is conducive to the demand for lightweight design.

[0017] As one of the optional embodiments of the present solution, a buffer is provided between two adjacent single cells along the circumferential direction, and the buffer is provided in contact with opposite sides of the two single cells respectively.

[0018] As one of the optional embodiments of this solution, the buffer member is configured as an elastic member with elasticity.

[0019] As one of the optional embodiments of this solution, the buffer is configured in a ring shape.

[0020] By implementing the above technical solution, the buffer component can absorb part of the expansion force, provide a buffer space for the deformation of the single battery, ensure the space required for normal deformation of the single battery during charging and discharging, and make the transmission of the expansion force relatively mild.

[0021] As one of the optional embodiments of the present scheme, the accommodating component includes a carrier plate and a fixing member, the single cell is placed on the carrier plate at one end face of the axial direction, the fixing member is arranged along the circumferential direction around the outside of the plurality of single cells, the fixing member is arranged in contact with the outside of the plurality of single cells, the fixing member is close to a side face of the single cell to form the side wall, and the carrier plate and the fixing member are arranged around to form the accommodating space.

[0022] As one of the optional embodiments of this solution, the fixing member is configured as an elastic strap.

[0023] As one of the optional embodiments of this solution, the accommodating component includes a box body with an opening and a box cover covering the opening, the box cover closes the opening to form the accommodating space, and the inner wall surface of the box body facing the single battery forms the side wall.

[0024] On the other hand, the present application also discloses an electrical device, which includes: the battery pack mentioned above.

[0025] One of the above technical solutions has the following advantages or beneficial effects:

[0026] Since the single cells are arranged in a ring shape, the expansion force generated by the single cells is mainly transmitted between the single cells, and the remaining expansion force will evenly work on the containing component to cause the containing component to deform or tend to deform, that is, the expansion force is evenly dispersed through the side wall of the ring, and ultimately the expansion force exerted on each single cell in the entire battery pack system tends to be consistent, reducing the force differences generated by single cells in different positions when subjected to expansion force, thereby improving the charge and discharge performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0028] Figure 1 It is a drawing used to represent the relevant background technology;

[0029] Figure 2 is an overall structural diagram of the battery pack provided in Example 1 of the present application;

[0030] Figure 3 is an exploded structural diagram of a battery pack provided in Example 1 of the present application;

[0031] Figure 4 It is an exploded schematic diagram provided in Example 1 of the present application and mainly used to show the structure of a single battery and a buffer;

[0032] Figure 5 It is an exploded structure diagram provided in the present application for representing the specific structure of a single cell;

[0033] Figure 6 is an analysis diagram provided by the present application for representing the wedge design of a single cell;

[0034] Figure 7 It is a top view provided in Example 1 of the present application and mainly used to show the arrangement of single cells;

[0035] Figure 8 is a top view of a single cell provided in the present application when it is square;

[0036] Fig. 9 is an exploded structural diagram of the battery pack structure in Example 2 provided in the present application;

[0037] Fig.10 It is an exploded structural diagram of the battery pack structure in Example 3 provided in the present application.

[0038] Reference numerals: 1, accommodating component; 1a, accommodating space; 1b, side wall; 11, carrier plate; 12, fixing member; 16, box body; 161, opening; 17, box cover;

[0039] 100, accommodating shell; 101, shell; 102, cover; 1021, positive pole; 1022, negative pole; 1011, first side surface; 1012, second side surface; 1013, third side surface;

[0040] 200. Electrode assembly;

[0041] 2. Single battery;

[0042] 3. Fixing column; 31. Mounting slot;

[0043] 4. Buffer; X, circumferential direction; Z, axial direction;

[0044] 5. Busbar;

[0045] 62. Battery box; 61. Insulation board; 63. Battery cover; 64. Module box; 612. Insulation chamber. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally indicates that the associated objects before and after are in an "or" relationship.

[0048] The following is combined with Figure 1 Introduce relevant existing technologies.

[0049] Reference Figure 1 In the prior art, a plurality of square single cells 2 are generally stacked and arranged in a straight line and placed in a box 16 to form a battery pack. Among them, the large surfaces of adjacent single cells 2 are in contact with each other. This kind of battery pack design will cause the expansion force generated by the single cell 2 to be transmitted along a straight line when the single cell 2 expands during the charging and discharging process, thereby causing the expansion force of the single cell 2 near the two ends to deform the battery pack box by doing work on the battery pack box, thereby partially releasing the expansion force of the single cell 2 near the two ends, while the single cell 2 closer to the middle position is difficult to release the expansion force due to a series of reasons such as battery deformation and force transmission, resulting in different expansion forces on the single cells 2 at different positions. For example, in Figure 1 As shown in FIG. 1 , the denser the cross-section lines of the single battery 2, the more complicated the stress conditions. Therefore, in the prior art, the single batteries 2 at different positions in the battery pack have inconsistent stress conditions, which affects the working performance and service life of the battery pack.

[0050] The following is combined with Figure 2-10 The present application is further described.

[0051] Reference Figure 2 and Figure 3 The present application discloses a battery pack having an intersecting circumferential direction X and an axial direction Z. In this embodiment, the axial direction Z is perpendicular to the circumferential direction X.

[0052] The battery pack includes a receiving component 1 and a plurality of single batteries 2 .

[0053] The receiving component 1 refers to a battery shell, a battery box, or the like of a battery pack, which is used to contain a single battery 2, and has a receiving space 1a. A plurality of single batteries 2 are stacked in a circular shape along a circumferential direction X in the receiving space 1a, and opposite sides of adjacent single batteries 2 along the circumferential direction X are in contact with each other.

[0054] The receiving part 1 has a side wall 1b arranged along the circumferential direction X, and the side wall 1b is arranged outside the plurality of single cells 2 and contacts the outside of the plurality of single cells 2 in the circumferential direction X. The battery pack also includes a busbar 5, which is used for electrical connection between the plurality of single cells 2 and with the outside. In this embodiment, the busbar 5 is annular and is connected to the electrodes of the plurality of single cells 2 respectively. The fixing method between the busbar 5 and the electrodes of the single cells 2 includes but is not limited to welding and bonding.

[0055] According to the above setting, since the single cells 2 are arranged in a ring shape, the expansion force generated by the single cells 2 is mainly transmitted between the single cells 2, and the remaining expansion force will evenly work on the containing component 1 to cause the containing component 1 to deform or tend to deform, that is, the expansion force is evenly dispersed through the annular side wall 1b, and finally the expansion force applied to each single cell 2 in the entire battery pack system tends to be consistent, reducing the force difference generated by the single cells 2 at different positions when subjected to the expansion force, thereby improving the charge and discharge performance of the battery pack.

[0056] It should be noted that the "contact" or "contact setting" described in this article refers to the fact that during the operation of the battery pack, the two surfaces of two adjacent single cells 2 in the lateral direction X that are close to each other are in contact due to the expansion force generated during the charging and discharging process, so that the expansion force is transmitted between the single cells 2, which is a final state during the operation process. However, it is not excluded that when the battery pack product is just produced, there may be a gap between the two adjacent single cells 2 in the lateral direction X, but during the charging and discharging process, the single cells 2 expand and cause "contact" or "contact setting". The single cells 2 described in this article can also be battery cells.

[0057] It should be noted that the structure of the accommodating component 1 can have various forms.

[0058] For example, in one example, the receiving component 1 includes a carrier plate 11 and a fixing member 12 .

[0059] The carrier 11 is a circular flat plate, and one end face of each single battery 2 in the axial direction Z is placed on the carrier 11, and the single battery 2 is arranged in a circular ring around the center of the carrier 11. The fixing member 12 is an elastic band, and the material of the band can be metal, or other materials such as plastic or mixed materials. Two fixing members 12 are arranged along the axial direction Z, and each fixing member 12 is arranged along the circumferential direction X around the outside of multiple single batteries 2. The fixing member 12 is arranged in contact with the outside of multiple single batteries 2, and the side of the fixing member 12 close to the single battery 2 forms a side wall 1b, and the side wall 1b abuts against the outer wall of the single battery 2 to form a fixed limit for the single battery 2. The carrier 11 and the fixing member 12 are arranged to form a accommodating space 1a.

[0060] In this example, since the battery pack is formed by the combination of the fixing member 12 and the carrier 11, on the one hand, the fixing member 12 has a certain deformation amount, and when assembling the battery pack, the single battery 2 can be placed first, and after the position or connection relationship of the single battery 2 and other electrical components is confirmed, the fixing member 12 can be finally installed, so that the operator can be given more adjustment space to place or adjust the position of the single battery 2, which is convenient for the operator's operation process. On the other hand, it can also greatly save materials and effectively reduce costs.

[0061] Reference Figure 3 and Figure 4 In an optional example, specifically, a plurality of single cells 2 are arranged in a circular ring shape. Each single cell 2 has two first side surfaces 1011 close to other single cells 2, the two first side surfaces 1011 are arranged at an angle, the distance between the two first side surfaces 1011 gradually decreases toward the center of the circumferential direction X, and the first side surfaces 1011 of the single cells 2 adjacent to each other along the circumferential direction X are parallel to each other. The positive and negative electrodes of the single cells 2 are arranged on the top end away from the carrier 11 in the axial direction Z, and the busbar 5 is connected to the positive and negative electrodes of the battery.

[0062] More specifically, the single battery 2 may be wedge-shaped or in other shapes. Figure 5 and Figure 6 The wedge-shaped design of the single battery 2 is described in more detail.

[0063] Reference Figure 5The single cell 2 includes a housing 101 and an electrode assembly 200 disposed in the housing 101. The housing 101 includes a shell 101 and a cover 102. The electrode assembly 200 is placed in the shell 101. The cover 102 is provided with a positive electrode column 1021 and a negative electrode column 1022. The electrode assembly 200 includes a positive electrode sheet, a separator, and a negative electrode sheet. The positive electrode sheet, the separator, and the negative electrode sheet are wound or stacked to form the electrode assembly 200. The positive electrode ear and the negative electrode ear of the electrode assembly 200 are respectively connected to the positive electrode column 1021 and the negative electrode column 1022 to achieve electrical conduction. The positive electrode column 1021 and the negative electrode column 1022 are electrically connected to the busbar 5 to achieve electrical conduction between the single cell 2 and the outside world.

[0064] Reference Figure 5 and Figure 6 The peripheral side surface of the housing 101 includes a first side surface 1011 in contact with the adjacent single battery 2, a second side surface 1012 close to the center of the carrier 11, and a third side surface 1013 facing away from the second side surface 1012. The two first side surfaces 1011 are parallel to the Z direction, and the second side surface 1012 and the third side surface 1013 are perpendicular to the Z direction.

[0065] More specifically, refer to Figure 6 Each single cell 2 has a center plane, which passes through the central axis of the carrier 11, and the angles between the two first side surfaces 1011 and the center plane are the same, that is, the single cells 2 are symmetrically arranged about the center plane. This setting makes the force-bearing surface formed between the two first side surfaces 1011 of two adjacent single cells 2 close to each other pass through the central axis of the carrier 11. Then, by force analysis of the force-bearing surface, it can be obtained that the transmission direction of the expansion force is perpendicular to the radial direction of the carrier 11. By analogy, the transmission of the expansion force between each two adjacent single cells 2 is perpendicular to the radial direction of the array ring, which further standardizes the transmission of the expansion force, further reduces the inconsistency of the expansion force transmission, reduces the influence of the expansion force on the single cell 2, and improves the overall performance of the battery pack.

[0066] According to the above settings, since the single cells 2 are arranged in a regular circular ring, the stress conditions of each single cell 2 in the entire battery pack system tend to be consistent, so as to improve the consistency of the performance of the single cells 2. In addition, since the single cells 2 are designed as "wedge-shaped", the first side surfaces 1011 of two adjacent single cells 2 that are attached to each other are parallel. Combined with the inclined design of the first side surfaces 1011, it can be ensured that the abutment force can be transmitted in a relatively standardized manner along the circumferential direction, so that the expansion force is transmitted more evenly in the circumferential direction, which is conducive to ensuring the consistency of the stress state of each single cell 2, thereby improving the performance of the battery pack.

[0067] Continue to refer to Figure 4The battery pack further includes a fixing column 3 extending along the axial direction Z. The fixing column 3 is arranged at one end of the plurality of single cells 2 away from the side wall 1b. Specifically, in this embodiment, the fixing column 3 is coaxially fixedly arranged on the surface of the carrier 11. The plurality of single cells 2 are arranged in a circular ring around the fixing column 3. One end of the single cell 2 close to the fixing column 3 is arranged in contact with the outer side surface of the fixing column 3. A mounting groove 31 is opened on the fixing column 3 along the axial direction Z.

[0068] In order to match the fixing column 3 and the circular array of the single battery 2, the second side surface 1012 is set to be arc-shaped and fits the outer wall of the fixing column 3, and the third side surface 1013 is set to be arc-shaped with the center of the fixing column 3 as the center of the circle.

[0069] With the above settings, the fixing column 3 mainly supports and isolates the single cells 2. Only the first side surfaces 1011 of the single cells 2 are in contact with each other, so that the expansion force is transmitted along the circumferential direction, and the single cells 2 are prevented from making contact in other directions, thereby preventing the expansion force from being transmitted in other directions. The expansion force on the single cells 2 is regulated, and the installation groove 31 is provided in the middle of the fixing column 3 to facilitate the installation of electrical components or cooling components, etc., and can also reduce the weight of the battery pack, which is conducive to the demand for lightweight design.

[0070] Reference Figure 4 and Figure 7 A buffer member 4 is further arranged between two adjacent single batteries 2 along the circumferential direction X. The buffer member 4 is arranged in contact with opposite sides of the two single batteries 2. The buffer member 4 is arranged to be an elastic member with elasticity.

[0071] The above setting enables the buffer member 4 to absorb part of the expansion force, providing a buffer space for the deformation of the single battery 2, ensuring the space required for normal deformation of the single battery 2 during the charge and discharge process, and further making the expansion force transmission relatively mild.

[0072] In one example, the buffer 4 is specifically configured to be frame-shaped, and the edge of the buffer 4 extends to the edge of the first side 1011. More specifically, this setting can effectively save costs while ensuring the isolation and buffering functions mentioned above. In addition, when the single cell 2 expands, the middle area is generally more likely to expand. The buffer 4 is designed to be frame-shaped, avoiding the middle area of ​​the single cell 2, which is more conducive to the expansion of the single cell 2 while achieving isolation and buffering. In other optional embodiments, the buffer 4 can also be configured to be annular.

[0073] It should be noted that the single battery 2 and the buffer 4 may also be designed in other shapes. Figure 8As shown in the figure, the single battery 2 is designed as a conventional square battery, and the corresponding buffer 4 is designed as a "wedge shape". The single battery 2 is arranged in a circular ring around the fixing column 3, and the buffer 4 is sandwiched between two adjacent single batteries 2. When the single battery 2 is set to be square, the buffer 4 is set to be wedge-shaped, which can facilitate abutment and uniform transmission of expansion force.

[0074] In another alternative embodiment, referring to Fig. 9 Specifically, the accommodating component 1 includes a box body 16 having an opening 161 and a box cover 17 covering the opening 161 , the box cover 17 closes the opening 161 to form an accommodating space 1a , and the inner wall surface of the box body 16 facing the single battery 2 forms a side wall 1b .

[0075] In another alternative embodiment, referring to Fig.10 , the accommodating component 1 also has another structure. Specifically, the accommodating component 1 may also include: a battery box 62, a battery cover 63, and an insulating plate 61 spaced in the battery box 62 along the Z direction, the insulating plate 61 divides the battery box 62 into a plurality of insulating chambers 612, and the accommodating component 1 also includes a module box 64 correspondingly placed in the insulating chamber 612, and each module box 64 has a plurality of single cells 2 stacked in a ring shape. Among them, after each single cell 2 is placed in each module box 64, the structure of each module box 64 plus the single cell 2 is the same as Figure 2 or Fig. 9 The structure of the battery pack shown in the figure is the same. This setting can further integrate multiple independent battery packs into a larger battery pack. Due to the special design of the single battery 2 and the busbar 5, in order to avoid short circuit contact between adjacent module boxes 64, an insulating plate 61 is set between two adjacent module boxes 64 along the Z direction.

[0076] It should be noted that, in one example, in order to facilitate the electrical connection of adjacent bus bars 5 , etc., through holes are provided on the insulating plate 61 for the electrical connection connectors to pass through.

[0077] According to this embodiment, Figure 2 or Fig. 9 The whole battery pack in the embodiment is regarded as a battery module, and then multiple battery packs are stacked and loaded into a battery box 62, so as to realize the combination of more single batteries 2. In this embodiment, an insulating plate 61 is arranged between the module boxes 64 stacked along the axial direction Z to realize the insulation measure of the busbar 5, so as to avoid the risk of short circuit caused by the contact between the busbar 5 and other single batteries 2.

[0078] On the other hand, the present application also discloses an electric device, which includes: the battery pack mentioned above. The electric device may be a mobile phone, a portable device, a laptop computer, a battery car, an electric car, a ship, a spacecraft, an electric toy, an electric tool, etc.

[0079] The above description is only a partial implementation method of the embodiments of the present application and does not constitute any form of limitation on the application. The protection scope of the embodiments of the present application is not limited thereto. Any simple modifications, equivalent changes and modifications that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the embodiments of the present application should be covered within the protection scope of the embodiments of the present application.

Claims

1. A battery pack having intersecting circumferential directions (X) and axial directions (Z), characterized in that: include: A receiving component (1) having a receiving space (1a); A plurality of single cells (2), wherein the plurality of single cells (2) are stacked in a ring shape along the circumferential direction (X) in the accommodation space (1a), and opposite sides of the single cells (2) adjacent to each other along the circumferential direction (X) are in contact with each other; The accommodating component (1) has a side wall (1b) arranged along the circumferential direction (X), and the side wall (1b) surrounds the outside of the plurality of single batteries (2) and contacts the outside of the plurality of single batteries (2) in the circumferential direction (X).

2. The battery pack according to claim 1, characterized in that: The plurality of single cells (2) are arranged in a circular ring shape.

3. The battery pack according to claim 2, characterized in that: Each of the single cells (2) has two first side surfaces (21) close to other single cells (2), the two first side surfaces (21) are arranged at an angle, the distance between the two first side surfaces (21) gradually decreases toward the center of the circumferential direction (X), and the first side surfaces (21) of the adjacent single cells (2) along the circumferential direction (X) that are in contact with each other are parallel to each other.

4. The battery pack according to claim 2, characterized in that: The battery pack further comprises a fixing column (3) extending along the axial direction (Z), the fixing column (3) being arranged at one end of the plurality of single cells (2) away from the side wall (1b), the plurality of single cells (2) being arranged in a circular ring around the fixing column (3), and one end of the single cell (2) close to the fixing column (3) being arranged in contact with the outer side surface of the fixing column (3).

5. The battery pack according to claim 4, characterized in that: The fixing column (3) is provided with a mounting groove (31) along the axial direction (Z).

6. The battery pack according to claim 1, wherein: A buffer member (4) is arranged between two adjacent single batteries (2) along the circumferential direction (X), and the buffer member (4) is arranged in contact with opposite sides of the two single batteries (2).

7. The battery pack according to claim 6, characterized in that: The buffer member (4) is configured as an elastic member having elasticity.

8. The battery pack according to claim 6, wherein: The buffer member (4) is arranged in a ring shape.

9. The battery pack according to any one of claims 1 to 8, characterized in that: The accommodating component (1) comprises a carrier plate (11) and a fixing member (12); the single cell (2) is placed on the carrier plate (11) at one end face in the axial direction (Z); the fixing member (12) is arranged outside the plurality of single cells (2) along the circumferential direction (X); the fixing member (12) is arranged in contact with the outside of the plurality of single cells (2); the fixing member (12) is close to one side of the single cell (2) to form the side wall (1b); the carrier plate (11) and the fixing member (12) are arranged to form the accommodating space (1a).

10. The battery pack according to claim 9, characterized in that: The fixing member (12) is configured as an elastic binding belt.

11. The battery pack according to any one of claims 1 to 8, characterized in that: The accommodating component (1) comprises a box body (16) having an opening (161) and a box cover (17) covering the opening (161); the box cover (17) closes the opening (161) to form the accommodating space (1a); and the inner wall surface of the box body (16) facing the single battery (2) forms the side wall (1b).

12. An electrical equipment, characterized in that: include: A battery pack as claimed in any one of claims 1 to 11.

Images