A single cell and a battery pack
By setting a stepped section on the side wall of the casing, the tab assembly and electrode assembly occupy independent space in the single cell, which solves the problem of tab space occupation, improves space utilization and production efficiency, and reduces costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-07-10
AI Technical Summary
The tabs occupy the entire space on the side of the cell facing the top cover, resulting in low utilization of the internal space of the battery.
A stepped portion is provided on the side wall of the housing, and the electrode assembly is located on the side of the stepped surface facing the opening. The electrode assembly of the cover plate assembly is arranged opposite to the stepped portion, providing independent accommodating space and avoiding occupying all the space on the side of the cell facing the cover plate assembly.
It improves the space utilization of individual cells, reduces the internal space occupied, increases production efficiency and product yield, and reduces costs.
Smart Images
Figure CN224481028U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of new energy battery technology, and in particular to a single cell battery and a battery pack. Background Technology
[0002] The tab is an important structure in a power battery, used to connect the cell to the terminal on the top cover.
[0003] In related technologies, the tabs are usually required to occupy the entire space on the side of the cell facing the top cover, resulting in low utilization of the internal space of the battery. Utility Model Content
[0004] This application provides a single-cell battery and a battery pack, which improves the internal space utilization of the single-cell battery.
[0005] This application provides a single-cell battery, comprising:
[0006] The shell includes a shell body and a skirt. A first opening is provided on one side of the shell body. The skirt is arranged around the end of the shell body near the first opening and is located on the side of the shell body away from the first opening. At least one side wall of the shell body is provided with a stepped portion, and the stepped portion has a stepped surface facing the first opening.
[0007] A cover plate assembly includes a cover plate and an electrode assembly. The cover plate covers the first opening and the skirt and is connected to the skirt. The electrode assembly is disposed on the cover plate. The orthographic projection of the stepped surface on the cover plate covers the position where the electrode assembly is disposed on the cover plate.
[0008] A battery cell is disposed in the housing body. The battery cell has a tab assembly, which is disposed on the side of the stepped surface facing the first opening and is electrically connected to the electrode assembly.
[0009] In some possible implementations, a connecting portion is further connected between the shell body and the skirt, and the connecting portion is configured as an arc surface on the side facing the first opening.
[0010] In some possible implementations, each of the two opposing sidewalls of the housing is provided with a stepped portion;
[0011] The electrode assembly includes a first electrode and a second electrode with opposite polarities. The first electrode and the second electrode are respectively disposed at both ends of the battery cell. The first electrode and the second electrode are respectively disposed on the side of the two stepped surfaces facing the first opening.
[0012] The electrode assembly includes a first electrode and a second electrode with opposite polarities. The first electrode is disposed at one end of the cover plate near the first electrode tab and is electrically connected to the first electrode tab. The second electrode is disposed at one end of the cover plate near the second electrode tab and is electrically connected to the second electrode tab.
[0013] In some possible implementations, one of the sidewalls of the housing is provided with the stepped portion;
[0014] The electrode assembly includes a first electrode and a second electrode with opposite polarities. The first electrode and the second electrode are disposed at the same end of the battery cell. Both the first electrode and the second electrode are disposed on the side of the stepped surface facing the first opening.
[0015] The electrode assembly includes a first electrode and a second electrode with opposite polarities. Both the first electrode and the second electrode are disposed at the end of the cover plate near the first electrode tab. The first electrode is electrically connected to the first electrode tab, and the second electrode is electrically connected to the second electrode tab.
[0016] In some possible implementations, the stepped portion is formed by bending the sidewall toward the interior of the housing.
[0017] In some possible implementations, the individual battery cell includes a first direction, a second direction, and a third direction that intersect each other, wherein the extension dimension of the individual battery cell along the first direction is smaller than the extension dimension of the individual battery cell along the second direction, and the extension dimension of the individual battery cell along the second direction is smaller than the extension dimension of the individual battery cell along the third direction, and the first opening is disposed on one side of the housing body along the first direction.
[0018] In addition, this application also provides a battery pack, including a housing assembly and a plurality of individual batteries as described in the above embodiments, wherein the individual batteries have intersecting first and second directions, and the first opening is disposed on one side of the housing body along the first direction.
[0019] The housing assembly includes a first housing and a second housing. The first housing has a second opening, which is located on one side of the first housing along the second direction. A plurality of individual batteries are sequentially arranged in the first housing along the first direction. The second housing is connected to the first housing and covers the second opening.
[0020] In some possible implementations, the battery pack further includes a cooling plate parallel to the first direction, the cooling plate being disposed in the first housing and located on the side of the individual battery cell facing away from the second opening;
[0021] The cooling plate has a clearance groove on the side facing the single battery cell. The skirt in the housing opposite to the cooling plate and the part of the cover plate that fits with the skirt are inserted into the clearance groove.
[0022] In some possible implementations, the single cell includes a first electrode and a second electrode with opposite polarities, wherein the first electrode and the second electrode of any single cell are located at the same end of the battery pack.
[0023] In some possible implementations, the single cell includes a first electrode and a second electrode with opposite polarities, the first electrode and the second electrode being distributed at both ends of the single cell;
[0024] The first electrodes of any two adjacent individual cells are located at the same end of the battery pack or at opposite ends of the battery pack.
[0025] The beneficial effects of this application are as follows: In the single-cell battery provided by this application, at least one side wall of the casing body has a stepped portion opposite to the first opening. The electrode assembly of the cell is disposed on the side of the stepped portion facing the first opening, and the electrode assembly of the cover plate assembly is disposed opposite to the stepped portion. Accordingly, the position between the stepped portion and the first opening can provide independent accommodating space for the electrode assembly and the electrode assembly, facilitating the lead-out of the electrode assembly, and also providing clearance space for the electrode assembly. It does not require occupying all the space on the side of the cell facing the cover plate assembly, reducing the occupation of the internal space of the single-cell battery and improving space utilization. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 A three-dimensional structural schematic diagram of a single cell is shown in some embodiments;
[0028] Figure 2 Schematic diagrams of the exploded structure of a single cell are shown in some embodiments;
[0029] Figure 3 A cross-sectional structural schematic diagram of a single cell is shown in some embodiments;
[0030] Figure 4 It shows Figure 3 A magnified schematic diagram of part A in the middle section;
[0031] Figure 5Schematic diagrams of the exploded structure of a single cell are shown in some other embodiments;
[0032] Figure 6 A cross-sectional structural schematic diagram of a single cell is shown in some other embodiments;
[0033] Figure 7 Exploded structural diagrams of the battery pack in some embodiments are shown;
[0034] Figure 8 A partial structural schematic diagram of the battery pack is shown in some embodiments;
[0035] Figure 9 A partial structural schematic diagram of the battery pack is shown in some other embodiments;
[0036] Figure 10 A partial structural schematic diagram of the battery pack is shown in some other embodiments.
[0037] Explanation of key component symbols:
[0038] 1000-cell battery;
[0039] 100 - Shell; 110 - Shell body; 111 - First opening; 112 - Stepped portion; 1121 - Stepped surface; 113 - Side wall; 1131 - First side wall; 1132 - Second side wall; 114 - Receiving cavity; 115 - Bottom plate; 120 - Skirt; 130 - Connecting portion;
[0040] 200 - Cover plate assembly; 210 - Cover plate; 220 - Electrode assembly; 221 - First electrode; 222 - Second electrode;
[0041] 300 - Battery cell; 310 - Battery cell body; 320 - Electrode assembly; 321 - First electrode; 322 - Second electrode;
[0042] 2000 - Cooling plate; 2100 - Clearance groove;
[0043] 3000 - Enclosure assembly; 3100 - First enclosure; 3110 - Second opening; 3200 - Second enclosure;
[0044] X - First direction; Y - Second direction; Z - Third direction. Detailed Implementation
[0045] The embodiments of this application are described in detail below. 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 application, and should not be construed as limiting this application.
[0046] 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.
[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0048] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0049] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0050] like Figures 1 to 3As shown, an embodiment provides a single-cell battery 1000, including a housing 100, a cover assembly 200, and a cell 300. The housing 100 includes a housing body 110 and a skirt 120. A first opening 111 is disposed on one side of the housing body 110, and the skirt 120 is disposed around the periphery of the housing body 110 near the end of the first opening 111, and the skirt 120 may be located on the side of the housing body 110 opposite to the first opening 111. At least one sidewall 113 of the housing body 110 is provided with a stepped portion 112, the stepped portion 112 having a stepped surface 1121 facing the first opening 111.
[0051] In some embodiments, the shell body 110 and the skirt 120 may be an integral structure. The shell body 110 may include a bottom plate 115 opposite to the first opening 111, and the bottom plate 115 may be a right-angled quadrilateral. The shell body 110 may also include four side walls 113, which may be disposed around the periphery of the bottom plate 115. Specifically, the four side walls 113 may be disposed one-to-one on the four sides of the bottom plate 115, and the end of the side wall 113 away from the bottom plate 115 may extend toward the first opening 111. Correspondingly, the first opening 111 may be formed by the four side walls 113 away from the bottom plate 115. In addition, the four side walls 113 and the bottom plate 115 may cooperate to form a receiving cavity 114, which is connected to the first opening 111.
[0052] In other embodiments, the base plate 115 may also be triangular or trapezoidal in shape. Accordingly, the housing body 110 may include three or four sidewalls 113. The individual cell 1000 may be an irregularly shaped individual cell 1000.
[0053] In some embodiments, the cover assembly 200 includes a cover 210 and an electrode assembly 220. The cover 210 covers the first opening 111 and the skirt 120 and is connected to the skirt 120. The electrode assembly 220 is disposed on the cover 210 and opposite to the step portion 112. That is, the orthographic projection of the step surface 1121 on the cover 210 covers the position of the electrode assembly 220 on the cover 210. In embodiments, the cover 210 and the skirt 120 can be connected by welding, which not only fixes the cover 210 to the housing 100 but also seals the connection position. Accordingly, the cover 210 can seal the first opening 111 of the housing body 110 to prevent leakage and other problems, and can also provide dustproof and waterproof protection.
[0054] In this embodiment, the electrode assembly 220 can be inserted through the cover plate 210 and fixedly connected to the cover plate 210 by means of riveting or other methods. One end of the electrode assembly 220 can be inserted into the receiving cavity 114 of the housing body 110. The other end of the electrode assembly 220 can be exposed on the side of the cover plate 210 away from the receiving cavity 114, so as to realize the electrical connection between the single battery 1000 and other external devices.
[0055] In some embodiments, the battery cell 300 may be disposed in the receiving cavity 114 within the housing body 110. In some embodiments, the battery cell 300 includes a body and a tab assembly 320 disposed on the body. The body is formed by winding or stacking a positive electrode sheet, a separator, and a negative electrode sheet. The battery cell 300 has a tab assembly 320, which may be disposed on the side of the stepped surface 1121 facing the first opening 111 and electrically connected to the electrode assembly 220, thereby realizing the electrical connection between the battery cell 300 and the electrode assembly 220.
[0056] In this embodiment, at least one sidewall 113 of the casing body 110 is formed with a stepped portion 112 facing the first opening 111. The electrode assembly 320 of the cell 300 can be disposed on the side of the stepped surface 1121 facing the first opening 111, and the electrode assembly 220 of the cover plate assembly 200 is disposed opposite to the stepped surface 1121. Accordingly, the position between the stepped surface 1121 and the first opening 111 can provide independent accommodating space for the electrode assembly 320 and the electrode assembly 220, facilitating the lead-out of the electrode assembly 320, and also providing clearance space for the electrode assembly 220, without occupying all the space of the cell 300 facing the cover plate assembly 200, reducing the occupancy of the internal space of the single battery 1000 and improving space utilization.
[0057] like Figure 1 and Figure 2 As shown in the embodiment, the single cell 1000 includes a first direction X, a second direction Y, and a third direction Z that intersect each other in pairs, wherein the angle of intersection between each pair can be 80°, 85°, 90°, 95°, etc. In some embodiments, the first direction X, the second direction Y, and the third direction Z are arranged perpendicularly to each other in pairs.
[0058] In some embodiments, the extension dimension of the single battery cell 1000 along the first direction X is smaller than the extension dimension of the single battery cell 1000 along the second direction Y. The extension dimension of the single battery cell 1000 along the second direction Y is smaller than the extension dimension of the single battery cell 1000 along the third direction Z. The first opening 111 is disposed on one side of the casing body 110 along the first direction X, that is, the first opening 111 can be opened on the side of the casing body 110 with the largest area. The areas of the four sidewalls 113 are all smaller than the area of the first opening 111. During the production of the single battery cell 1000, the cell 300 can be installed into the casing body 110 along the first direction X through the first opening 111, which allows the cell 300 to move the minimum distance during the assembly process, thereby improving the efficiency of the cell 300 being installed into the casing body 110, and thus improving the production efficiency of the single battery cell 1000 and increasing the production capacity.
[0059] like Figures 2 to 4 As shown, in some embodiments, a connecting portion 130 is also connected between the shell body 110 and the skirt 120, and the connecting portion 130 may also be arranged around the first opening 111. The side of the connecting portion 130 facing the first opening 111 may be configured as an arc surface. Accordingly, there will be no burrs or other sharp structures at the position of the shell 100 corresponding to the first opening 111. Thus, during the process of installing the battery cell 300 into the shell 100, scratches, punctures, or other damage to the battery cell 300 can be avoided, ensuring the safety of the battery cell 300 when installed into the shell body 110, improving the product yield of the single battery cell 1000, and reducing cost waste.
[0060] like Figures 1 to 3 As shown, in some embodiments, the shell body 110 may include two first sidewalls 1131 and two second sidewalls 1132. The two first sidewalls 1131 are disposed opposite to each other, and the first sidewalls 1131 may be perpendicular to a third direction Z. The two second sidewalls 1132 are disposed opposite to each other, and the second sidewalls 1132 may be perpendicular to a second direction Y.
[0061] In some embodiments, both first sidewalls 1131 are provided with stepped portions 112, and the stepped surfaces 1121 of the two stepped portions 112 can be at the same height in the first direction X. Furthermore, the stepped portions 112 can be formed by bending the first sidewalls 1131 towards the receiving cavity 114. Each bent edge of the stepped portion 112 is provided with rounded chamfers to prevent scratches and damage to structures such as the tab assembly 320.
[0062] In some embodiments, the battery cell 300 may include a battery cell body 310 and a first tab 321 and a second tab 322 with opposite polarities. The battery cell body 310 may be formed by winding positive and negative electrode sheets and a separator. The first tab 321 may be electrically connected to one of the electrode sheets, and the second tab 322 may be electrically connected to the other electrode sheet. For example, the first tab 321 may be electrically connected to the positive electrode sheet, and the second tab 322 may be electrically connected to the negative electrode sheet.
[0063] In other embodiments, the first tab 321 may be electrically connected to the negative electrode plate, and the second tab 322 may be electrically connected to the positive electrode plate.
[0064] In some embodiments, the axial direction of the cell body 310 may extend along a third direction Z, that is, the winding axis of the cell body 310 may be parallel to the third direction Z. The first tab 321 and the second tab 322 may be respectively disposed at both ends of the cell body 310 along the third direction Z. And the first tab 321 and the second tab 322 are respectively disposed on the side of the two stepped surfaces 1121 facing the first opening 111.
[0065] In some embodiments, the electrode assembly 220 includes a first electrode 221 and a second electrode 222 with opposite polarities. Exemplarily, the first electrode 221 can be used as a positive electrode, and the second electrode 222 can be used as a negative electrode. The first electrode 221 and the second electrode 222 can be disposed at opposite ends of the cover plate 210 along a third direction Z. In an embodiment, the first electrode 221 can be opposite to the first tab 321, and the first electrode 221 is electrically connected to the first tab 321. The second electrode 222 can be opposite to the second tab 322, and the second electrode 222 is electrically connected to the second tab 322.
[0066] like Figure 5 and Figure 6 As shown, in some embodiments, one of the first sidewalls 1131 is provided with a stepped portion 112. Along the third direction Z, the first tab 321 and the second tab 322 can be disposed at the same end of the cell body 310, and the first tab 321 and the second tab 322 can be arranged side-by-side along the second direction Y. Both the first tab 321 and the second tab 322 are located on the side of the stepped surface 1121 of the stepped portion 112 facing the first opening 111. The first electrode 221 and the second electrode 222 can also be located at the same end of the cover plate 210 along the third direction Z, and both the first electrode 221 and the second electrode 222 are opposite to the stepped portion 112. Furthermore, the first electrode 221 is opposite to the first tab 321 and is electrically connected. The second electrode 222 is opposite to the second tab 322 and is electrically connected.
[0067] like Figure 1 and Figure 7As shown, the embodiment also provides a battery pack, including a housing assembly 3000 and a plurality of individual batteries 1000 as provided in the embodiment. The plurality of individual batteries 1000 are arranged sequentially in the housing assembly 3000 along a first direction X.
[0068] In some embodiments, the housing assembly 3000 may include a first housing 3100 and a second housing 3200 disposed opposite to each other. A second opening 3110 may be configured on one side of the first housing 3100, and the second housing 3200 may cover the second opening 3110 and be connected to the first housing 3100. In an embodiment, the individual battery cell has a second direction Y intersecting a first direction X, and the second opening 3110 is disposed on one side of the first housing 3100 along the second direction Y. A plurality of individual batteries 1000 may be sequentially disposed in the first housing 3100 along the first direction X.
[0069] In some embodiments, the orientation of the plurality of individual battery cells 1000 can be set to be consistent, that is, the side of the plurality of individual battery cells 1000 with the cover plate assembly 200 can face the same side of the first housing 3100. In another embodiment, the side of the individual battery cell 1000 with the cover plate assembly 200 can be disposed facing a side panel of the first housing 3100, and correspondingly, the side of the individual battery cell 1000 with the cover plate assembly 200 can avoid the second opening 3110, and the individual battery cell 1000 can be placed sideways in the first housing 3100.
[0070] like Figure 1 , Figure 7 and Figure 8 As shown, in some embodiments, the battery pack further includes a cooling plate 2000, which may be parallel to the first direction X. The cooling plate 2000 may be disposed on the side of the individual battery 1000 opposite to the second opening 3110. That is, the cooling plate 2000 may be located at the bottom of the first housing 3100, and multiple individual batteries 1000 are located on the cooling plate 2000.
[0071] In some embodiments, the cooling plate 2000 has a plurality of clearance grooves 2100 on the side facing the individual battery 1000, and the plurality of clearance grooves 2100 can be arranged one-to-one with a plurality of individual batteries 1000. The portion of the skirt 120 in the housing 100 opposite to the cooling plate 2000 and the portion of the cover plate 210 that abuts the skirt 120 are both inserted into the corresponding clearance grooves 2100. Correspondingly, the sidewall 113 in the housing 100 opposite to the cooling plate 2000 can abut against the cooling plate 2000. Thus, the heat in the individual battery 1000 can be quickly dissipated to the outside through the cooling plate 2000.
[0072] In this embodiment, the single battery cell 1000 is placed on its side in the housing assembly 3000, and the clearance groove 2100 on the cooling plate 2000 provides clearance for the skirt 120 and the cover plate 210 in opposite positions, which can reduce the waste of space in the housing assembly 3000 and improve the space utilization of the battery pack.
[0073] like Figure 7 and Figure 8 As shown, in some embodiments, the first electrode 221 and the second electrode 222 of the same single cell 1000 are respectively disposed at both ends of the single cell 1000 along the third direction Z. The first electrodes 221 of any two adjacent single cells 1000 can be disposed at both ends of the battery pack along the third direction Z, that is, the first electrodes 221 and the second electrodes 222 of any two adjacent single cells 1000 are staggered, which can reduce the risk of short circuit when multiple single cells 1000 are connected and improve the safety of the battery pack.
[0074] like Figure 7 and Figure 9 As shown, in some other embodiments, the first electrodes 221 of the plurality of individual cells 1000 may be disposed near the same end of the housing assembly 3000 in the third direction Z, and the second electrodes 222 of the plurality of individual cells 1000 may be disposed near the other end of the housing assembly 3000 in the third direction Z.
[0075] like Figure 7 and Figure 10 As shown, in some embodiments, the first electrode 221 and the second electrode 222 of the same single cell 1000 may be located at the same end of the single cell 1000 along the third direction Z. The first electrode 221 and the second electrode 222 of multiple single cells 1000 may be located at the same end of the battery pack. Thus, the space utilization within the battery pack can be improved, and the connection efficiency between multiple single cells 1000 can be improved.
[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0077] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.
Claims
1. A single-cell battery, characterized in that, include: The shell (100) includes a shell body (110) and a skirt (120). A first opening (111) is provided on one side of the shell body (110). The skirt (120) is arranged around the end of the shell body (110) near the first opening (111) and is located on the side of the shell body (110) away from the first opening (111). At least one side wall (113) of the shell body (110) is provided with a step portion (112). The step portion (112) has a step surface (1121) facing the first opening (111). The cover plate assembly (200) includes a cover plate (210) and an electrode assembly (220). The cover plate (210) covers the first opening (111) and the skirt (120) and is connected to the skirt (120). The electrode assembly (220) is disposed on the cover plate (210). The orthographic projection of the step surface (1121) on the cover plate (210) covers the position of the electrode assembly (220) on the cover plate (210). A battery cell (300) is disposed in the housing body (110). The battery cell (300) has a tab group (320) disposed on the side of the stepped surface (1121) facing the first opening (111) and electrically connected to the electrode group (220).
2. The single-cell battery according to claim 1, characterized in that, A connecting part (130) is also connected between the shell body (110) and the skirt (120), and the connecting part (130) is configured as an arc surface on the side facing the first opening (111).
3. The single-cell battery according to claim 1 or 2, characterized in that, The housing (100) has a stepped portion (112) on each of the two opposite sidewalls (113). The electrode assembly (320) includes a first electrode (321) and a second electrode (322) with opposite polarities. The first electrode (321) and the second electrode (322) are respectively disposed at both ends of the battery cell (300). The first electrode (321) and the second electrode (322) are respectively disposed on the side of the two stepped surfaces (1121) facing the first opening (111). The electrode assembly (220) includes a first electrode (221) and a second electrode (222) with opposite polarities. The first electrode (221) is disposed at one end of the cover plate (210) near the first tab (321) and is electrically connected to the first tab (321). The second electrode (222) is disposed at one end of the cover plate (210) near the second tab (322) and is electrically connected to the second tab (322).
4. The single-cell battery according to claim 1 or 2, characterized in that, The stepped portion (112) is provided on one of the side walls (113) of the housing (100). The electrode assembly (320) includes a first electrode (321) and a second electrode (322) with opposite polarities. The first electrode (321) and the second electrode (322) are disposed at the same end of the battery cell (300). The first electrode (321) and the second electrode (322) are both disposed on the side of the stepped surface (1121) facing the first opening (111). The electrode group (220) includes a first electrode (221) and a second electrode (222) with opposite polarities. The first electrode (221) and the second electrode (222) are both disposed at one end of the cover plate (210) near the first tab (321). The first electrode (221) is electrically connected to the first tab (321), and the second electrode (222) is electrically connected to the second tab (322).
5. The single-cell battery according to claim 1 or 2, characterized in that, The stepped portion (112) is formed by bending the sidewall (113) toward the interior of the housing (100).
6. The single-cell battery according to claim 1 or 2, characterized in that, The single cell includes a first direction (X), a second direction (Y) and a third direction (Z) that intersect each other. The extension dimension of the single cell along the first direction (X) is smaller than the extension dimension of the single cell along the second direction (Y). The extension dimension of the single cell along the second direction (Y) is smaller than the extension dimension of the single cell along the third direction (Z). The first opening (111) is provided on the side of the shell body (110) along the first direction (X).
7. A battery pack, characterized in that, Includes a housing assembly (3000) and a plurality of individual cells as described in any one of claims 1 to 6, the individual cells having intersecting first direction (X) and second direction (Y), the first opening (111) being disposed on one side of the housing body (110) along the first direction (X); The housing assembly (3000) includes a first housing (3100) and a second housing (3200). The first housing (3100) has a second opening (3110). The second opening (3110) is located on one side of the first housing (3100) along the second direction (Y). A plurality of individual batteries are sequentially arranged in the first housing (3100) along the first direction (X). The second housing (3200) is connected to the first housing (3100) and covers the second opening (3110).
8. The battery pack according to claim 7, characterized in that, The battery pack also includes a cooling plate (2000) parallel to the first direction (X), the cooling plate (2000) being disposed in the first housing (3100) and located on the side of the individual battery cell facing away from the second opening (3110); The cooling plate (2000) has a clearance groove (2100) on the side facing the single battery cell. The skirt (120) of the housing (100) opposite to the cooling plate (2000) and the part of the cover plate (210) that is in contact with the skirt (120) are inserted into the clearance groove (210).
9. The battery pack according to claim 7 or 8, characterized in that, The single cell includes a first electrode (221) and a second electrode (222) with opposite polarities, and the first electrode (221) and the second electrode (222) of any single cell are located at the same end of the battery pack.
10. The battery pack according to claim 7 or 8, characterized in that, The single cell includes a first electrode (221) and a second electrode (222) with opposite polarities, the first electrode (221) and the second electrode (222) being distributed at both ends of the single cell; The first electrode (221) of any two adjacent individual cells is located at the same end of the battery pack or at opposite ends of the battery pack.