A single cell and a battery pack

Abstract

The application discloses a single battery and a battery pack, and relates to the technical field of batteries. The single battery comprises a shell, a top cover, an electrode assembly and an insulation layer. The top cover is connected with the shell; the electrode assembly is arranged in the shell; the insulation layer is arranged in the shell and wraps the electrode assembly, the insulation layer comprises a side insulation part and a filling part, the side insulation part is located at the side of the electrode assembly along a first direction, and the filling part is connected with one side of the side insulation part close to the electrode assembly; the electrode assembly comprises a first electrode main body and a second electrode main body arranged along a second direction, a gap is formed between the first electrode main body, the second electrode main body and the side insulation part, the filling part is located in the gap, and the filling part abuts against the first electrode main body and the second electrode main body. The single battery provided by the application can guarantee the cycle performance and service life of the electrode assembly without increasing the injection amount of electrolyte.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a single cell battery and a battery pack. Background Technology

[0002] Currently, square lithium-ion power batteries are mainly manufactured using a winding process. To improve battery capacity and performance, multiple electrode components are currently connected in parallel during production.

[0003] However, in this structural design, after the insulating layer encapsulates the dual-electrode assembly, the two ends of the assembly cannot be completely adhered to the insulating layer, resulting in a large gap. This necessitates increasing the electrolyte injection volume to fully wet the dual-electrode assembly, thus increasing production costs. If the electrolyte injection volume is not increased, the electrolyte cannot fully wet the dual-electrode assembly, thereby affecting its cycle performance and lifespan.

[0004] Therefore, how to ensure the cycle performance and lifespan of the dual-electrode assembly without increasing the electrolyte injection volume is a technical problem that urgently needs to be solved. Utility Model Content

[0005] In order to achieve the above objectives, this application aims to provide a single-cell battery.

[0006] The technical solution adopted is as follows: In a first aspect, embodiments of this application provide a single-cell battery having a first direction and a second direction perpendicular to each other, including: case; Top cover, connected to the housing; Electrode assembly, disposed within the housing; An insulating layer is disposed inside the housing and covers the electrode assembly. The insulating layer includes a side insulating portion and a filling portion. The side insulating portion is located on the side of the electrode assembly along the first direction, and the filling portion is connected to the side insulating portion near the electrode assembly. The electrode assembly includes a first electrode body and a second electrode body arranged along the second direction, with a gap formed between the first electrode body, the second electrode body and the side insulating portion, and the filling portion located within the gap and abutting against the first electrode body and the second electrode body.

[0007] In one embodiment of the first aspect, the first electrode body includes a first arcuate portion, the second electrode body includes a second arcuate portion, the gap is formed between the first arcuate portion, the second arcuate portion and the side insulating portion, the filling portion is provided with a first arcuate groove and a second arcuate groove, the first arcuate groove and the second arcuate groove are spaced apart along the second direction, the first arcuate portion is disposed in the first arcuate groove, and the second arcuate portion is disposed in the second arcuate groove.

[0008] In one embodiment of the first aspect, the insulating layer further includes a bottom insulating portion and a large insulating portion connected together, the bottom insulating portion being located at one end of the electrode assembly away from the top cover, and the side insulating portion being connected to the bottom insulating portion; the large insulating portion being located on the side of the electrode assembly along the second direction, and the large insulating portion being connected to the side insulating portion; The single cell also includes an insulating component, which is disposed inside the housing and located on the side of the top cover near the electrode assembly. The large-area insulating portion is fixedly connected to the insulating component.

[0009] In one embodiment of the first aspect, the large surface insulation includes an overlap portion, a portion of which is fixedly connected to the side surface insulation portion on the side away from the electrode assembly along the first direction.

[0010] In one embodiment of the first aspect, the single cell further includes an insulating adhesive layer, a notch is formed between the bottom insulating portion, the side insulating portion and the overlapping portion, a portion of the insulating adhesive layer is fixedly connected to the side of the overlapping portion opposite to the side insulating portion, and the insulating adhesive layer covers the notch.

[0011] In one embodiment of the first aspect, the insulating adhesive layer includes a first insulating adhesive portion and a second insulating adhesive portion connected together, the first insulating adhesive portion being fixedly connected to the overlapping portion, and the second insulating adhesive portion being fixedly connected to the side of the bottom insulating portion opposite to the electrode assembly.

[0012] In one embodiment of the first aspect, the insulating adhesive layer further includes a third insulating adhesive portion connected to the first insulating adhesive portion and the second insulating adhesive portion respectively, the third insulating adhesive portion being fixedly connected to the side of the large surface insulating portion away from the electrode assembly along the second direction.

[0013] In one embodiment of the first aspect, the large surface insulating portion includes a large surface connecting portion and a bottom connecting portion connected together, the bottom connecting portion being integrally formed with the large surface connecting portion, the large surface connecting portion being connected to the side insulating portion, and the bottom connecting portion being fixedly connected to the side of the bottom insulating portion opposite to the electrode assembly.

[0014] In one embodiment of the first aspect, the filling portion and the side insulation portion are integrally formed.

[0015] Secondly, embodiments of this application also provide a battery pack, including the single battery cells described in any of the above embodiments.

[0016] The beneficial effects of this application are as follows: This application proposes a single cell battery in which the side insulation portion is located on the side of the electrode assembly along a first direction, and a gap is formed between the first electrode body, the second electrode body and the side insulation portion. By providing a filling portion connected to the side insulation portion near the electrode assembly and located in the gap, and by abutting the filling portion against the first electrode body and the second electrode body, the gap space is occupied under the filling action of the filling portion, thereby reducing the amount of electrolyte used. Thus, the cycle performance and life of the electrode assembly can be guaranteed without increasing the amount of electrolyte injected. Attached Figure Description

[0017] 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.

[0018] Figure 1 A perspective view of a single cell in some embodiments of this application is shown; Figure 2 An exploded view of a single cell in some embodiments of this application is shown; Figure 3 This paper shows an exploded view of a single cell in some embodiments of this application. Figure 4 This application shows a three-dimensional schematic diagram of the insulating layer before folding in some embodiments. Figure 1 ; Figure 5 This application shows a three-dimensional schematic diagram of the insulating layer before folding in some embodiments. Figure 2 .

[0019] Explanation of key component symbols: 100 - Single cell; 110 - Casing; 120 - Top cover; 130 - Electrode assembly; 131 - First electrode body; 1311 - First arc-shaped portion; 132 - Second electrode body; 1321 - Second arc-shaped portion; 133 - Gap; 140 - Insulating layer; 141 - Bottom insulating portion; 142 - Large surface insulating portion; 143 - Side insulating portion; 1431 - Filling portion; 14311 - First arc-shaped groove; 14312 - Second arc-shaped groove; 144 - Overlapping portion; 145 - Notch; 146 - Bottom connecting portion; 147 - Large surface connecting portion; 150 - Insulating adhesive layer; 151 - First insulating adhesive portion; 152 - Second insulating adhesive portion; 153 - Third insulating adhesive portion; 160 - Insulating component; X - First direction; Y - Second direction. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] like Figure 1 and Figure 2 As shown, an embodiment of this application provides a single-cell battery 100, mainly used in battery packs, which are primarily used in electrical devices. The single-cell battery 100 has a first direction X and a second direction Y that are perpendicular to each other. The single-cell battery 100 includes a housing 110, a top cover 120, an electrode assembly 130, and an insulating layer 140.

[0026] The top cover 120 is connected to the housing 110. The electrode assembly 130 and the insulating layer 140 are both disposed inside the housing 110. The insulating layer 140 wraps around the electrode assembly 130. The insulating layer 140 includes a side insulating portion 143 and a filling portion 1431. The side insulating portion 143 is located on the side of the electrode assembly 130 along the first direction X. The filling portion 1431 is connected to the side of the side insulating portion 143 near the electrode assembly 130.

[0027] The electrode assembly 130 includes a first electrode body 131 and a second electrode body 132 arranged along the second direction Y. A gap 133 is formed between the first electrode body 131, the second electrode body 132 and the side insulation portion 143. A filling portion 1431 is located in the gap 133 and abuts against the first electrode body 131 and the second electrode body 132.

[0028] The single-cell battery 100 provided in the embodiments of this application has a side insulating portion 143 located on the side of the electrode assembly 130 along the first direction X. A gap 133 is formed between the first electrode body 131, the second electrode body 132 and the side insulating portion 143. By providing a filling portion 1431 connected to the side of the side insulating portion 143 near the electrode assembly 130 and located in the gap 133, and by abutting the filling portion 1431 against the first electrode body 131 and the second electrode body 132, the space of the gap 133 is occupied by the filling action of the filling portion 1431, thereby reducing the amount of electrolyte used. In this way, the cycle performance and life of the electrode assembly 130 can be guaranteed without increasing the amount of electrolyte injected.

[0029] like Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the first electrode body 131 includes a first arcuate portion 1311, and the second electrode body 132 includes a second arcuate portion 1321. A gap 133 is formed between the first arcuate portion 1311, the second arcuate portion 1321, and the side insulating portion 143. The filling portion 1431 is provided with a first arcuate groove 14311 and a second arcuate groove 14312. The first arcuate groove 14311 and the second arcuate groove 14312 are spaced apart along the second direction Y. The first arcuate portion 1311 is disposed in the first arcuate groove 14311, and the second arcuate portion 1321 is disposed in the second arcuate groove 14312.

[0030] In this embodiment, by providing a first arc-shaped groove 14311 and a second arc-shaped groove 14312 at intervals along the second direction Y on the filling portion 1431, and by placing the first arc-shaped portion 1311 and the second arc-shaped portion 1321 in the first arc-shaped groove 14311 and the second arc-shaped groove 14312 respectively, the filling portion 1431 is made to fit completely with the first arc-shaped portion 1311 and the second arc-shaped portion 1321, thereby maximizing the space occupied by the filling portion 1431 in the gap 133, thereby minimizing the amount of electrolyte used and further reducing production costs.

[0031] like Figure 2 , Figure 3 and Figure 4As shown, in one embodiment of this application, the insulating layer 140 further includes a bottom insulating portion 141 and a large insulating portion 142 connected together. The bottom insulating portion 141 is located at the end of the electrode assembly 130 away from the top cover 120, and the side insulating portion 143 is connected to the bottom insulating portion 141. The large insulating portion 142 is located on the side of the electrode assembly 130 along the second direction Y, and the large insulating portion 142 is connected to the side insulating portion 143. The single cell 100 also includes an insulating member 160, which is disposed inside the housing 110 and located on the side of the top cover 120 near the electrode assembly 130. The large insulating portion 142 is fixedly connected to the insulating member 160.

[0032] In this embodiment, the bottom insulating portion 141 is connected to the side insulating portion 143, and the bottom insulating portion 141 is disposed at the end of the electrode assembly 130 away from the top cover 120, so as to isolate the electrical gap 133 between the electrode assembly 130 and the inner bottom wall of the housing 110, and prevent the electrode assembly 130 from contacting the inner bottom wall of the housing 110 and causing a short circuit. The large insulating portion 142 is connected to the bottom insulating portion 141, and the large insulating portion 142 is disposed on the side of the electrode assembly 130 along the second direction Y, so as to isolate the electrical gap 133 between the two side walls of the electrode assembly 130 along the second direction Y and the two inner side walls of the housing 110 along the second direction Y, and prevent the two side walls of the electrode assembly 130 along the second direction Y from contacting the two inner side walls of the housing 110 along the second direction Y and causing a short circuit.

[0033] An insulating member 160 is provided on the side of the top cover 120 near the electrode assembly 130 to isolate the electrical gap 133 between the electrode assembly 130 and the top cover 120, preventing short circuits caused by contact between the electrode assembly 130 and the top cover 120. The large insulating portion 142 is fixedly connected to the insulating member 160 so that the insulating layer 140 stably wraps around the electrode assembly 130.

[0034] For example, the insulating element 160 can be made of plastic, and the large insulating part 142 can be fixedly connected to the insulating element 160 by heat fusion or adhesive bonding.

[0035] like Figure 2 , Figure 3 and Figure 4 As shown in the above embodiments of this application, the large surface insulating portion 142 includes an overlapping portion 144, a portion of which is fixedly connected to the side insulating portion 143 on the side away from the electrode assembly 130 along the first direction X.

[0036] In this embodiment, a portion of the overlapping portion 144 is fixedly connected to the side insulating portion 143 on the side away from the electrode assembly 130 along the first direction X, so as to completely isolate the electrical gap 133 between the two side walls of the electrode assembly 130 along the first direction X and the two inner side walls of the housing 110 along the first direction X through the overlapping portion 144 and the side insulating portion 143, thereby preventing the electrode assembly 130 from contacting the two side walls of the electrode assembly 130 along the first direction X and the two inner side walls of the housing 110 along the first direction X and causing a short circuit.

[0037] For example, the overlapping portion 144 and the side insulation portion 143 can be fixedly connected by heat fusion or adhesive bonding.

[0038] like Figure 2 and Figure 3 As shown in the above embodiments of this application, the single cell 100 further includes an insulating adhesive layer 150. A gap 145 is formed between the bottom insulating portion 141, the side insulating portion 143 and the overlapping portion 144. A portion of the insulating adhesive layer 150 is fixedly connected to the side of the overlapping portion 144 away from the side insulating portion 143, and the insulating adhesive layer 150 covers the gap 145.

[0039] In this embodiment, a gap 145 is formed between the bottom insulating portion 141, the side insulating portion 143 and the overlapping portion 144. By covering the gap 145 with the insulating adhesive layer 150, the electrolyte in the insulating layer 140 is prevented from leaking out of the insulating layer 140 through the gap 145, which would cause electrolyte loss and affect the cycle performance and lifespan of the electrode assembly 130.

[0040] Meanwhile, by fixing a portion of the insulating adhesive layer 150 to the side of the overlap portion 144 away from the side insulating portion 143, the insulating adhesive layer 150 stably covers the gap 145, preventing the insulating adhesive layer 150 from leaving the gap 145 and causing electrolyte loss.

[0041] For example, the insulating adhesive layer 150 and the overlapping portion 144 can be fixedly connected by heat fusion or adhesive bonding.

[0042] Specifically, such as Figure 2 and Figure 3 As shown in the above embodiments of this application, the insulating adhesive layer 150 includes a first insulating adhesive portion 151 and a second insulating adhesive portion 152 connected together. The first insulating adhesive portion 151 is fixedly connected to the overlapping portion 144, and the second insulating adhesive portion 152 is fixedly connected to the side of the bottom insulating portion 141 facing away from the electrode assembly 130. This configuration can further ensure the stability of the insulating adhesive layer 150's function of covering the gap 145, thereby further preventing the insulating adhesive layer 150 from leaving the gap 145 and causing electrolyte loss.

[0043] For example, the first insulating adhesive portion 151 and the overlapping portion 144 can be fixedly connected by heat fusion or bonding, and the second insulating adhesive portion 152 and the bottom insulating portion 141 can be fixedly connected by heat fusion or bonding.

[0044] like Figure 2 and Figure 3 As shown in the above embodiments of this application, the insulating adhesive layer 150 further includes a third insulating adhesive portion 153 connected to the first insulating adhesive portion 151 and the second insulating adhesive portion 152 respectively. The third insulating adhesive portion 153 is fixedly connected to the side of the large surface insulating portion 142 opposite to the electrode assembly 130 along the second direction Y. This arrangement can further ensure the stability of the function of the insulating adhesive layer 150 covering the notch 145, thereby further preventing the insulating adhesive layer 150 from leaving the notch 145 and causing electrolyte loss.

[0045] For example, the third insulating adhesive portion 153 can be fixedly connected to the large surface insulating portion 142 by heat fusion or adhesive bonding.

[0046] like Figure 5 As shown, in the above embodiments of this application, the large surface insulating portion 142 includes a large surface connecting portion 147 and a bottom connecting portion 146 connected together. The bottom connecting portion 146 is integrally formed with the large surface connecting portion 147. The large surface connecting portion 147 is connected to the side insulating portion 143. The bottom connecting portion 146 is fixedly connected to the side of the bottom insulating portion 141 away from the electrode assembly 130.

[0047] In this embodiment, the bottom connecting portion 146 and the large surface connecting portion 147 are integrally formed. By connecting the large surface connecting portion 147 to the side insulating portion 143, the electrical gap 133 between the two side walls of the electrode assembly 130 along the first direction X and the two inner side walls of the housing 110 along the first direction X is completely isolated through the large surface connecting portion 147 and the side insulating portion 143, so as to prevent the two side walls of the electrode assembly 130 along the first direction X from contacting the two inner side walls of the housing 110 along the first direction X and causing a short circuit.

[0048] Meanwhile, by fixing the bottom connecting portion 146 to the side of the bottom insulating portion 141 away from the electrode assembly 130, the large surface connecting portion 147 is fixedly connected to the bottom insulating portion 141 through the bottom connecting portion 146 to form a whole, so as to ensure the stability and reliability of the electrical clearance 133 between the two side walls of the electrode assembly 130 along the second direction Y and the two inner side walls of the housing 110 along the second direction Y. For example, the large surface connecting portion 147 and the side insulating portion 143 can be fixedly connected by heat fusion or adhesive bonding, and the bottom connecting portion 146 and the bottom insulating portion 141 can be fixedly connected by heat fusion or adhesive bonding.

[0049] In one embodiment of this application, the filling portion 1431 and the side insulation portion 143 are integrally formed.

[0050] In this embodiment, by integrally molding the filling part 1431 and the side insulation part 143, the connection stability and reliability between the filling part 1431 and the side insulation part 143 can be ensured, thereby guaranteeing the stability of the filling gap 133 function of the filling part 1431. Furthermore, the integral molding of the filling part 1431 and the side insulation part 143 eliminates the need for the installation step of connecting the filling part 1431 to the side insulation part 143, thus improving production efficiency.

[0051] For example, the filling portion 1431 and the side insulation portion 143 can be injection molded as a single unit.

[0052] Embodiments of this application also provide a battery pack, which includes the single battery cell 100 in any of the above embodiments.

[0053] The battery pack has the single cell 100 of any of the above embodiments, and therefore has all the beneficial effects of the single cell 100, which will not be described in detail here.

[0054] The battery pack has a housing and at least one individual battery cell 100 as described in any of the above embodiments, the individual battery cell 100 being disposed within the housing. When there are multiple individual batteries cell 100, the multiple individual batteries cell 100 can be connected in series or in parallel, or in a combination of series and parallel connections.

[0055] 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.

[0056] 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 having a first direction (X) and a second direction (Y) that are perpendicular to each other, characterized in that, include: Casing (110); The top cover (120) is connected to the housing (110); An electrode assembly (130) is disposed within the housing (110); An insulating layer (140) is disposed inside the housing (110) and surrounds the electrode assembly (130). The insulating layer (140) includes a side insulating portion (143) and a filling portion (1431). The side insulating portion (143) is located on the side of the electrode assembly (130) along the first direction (X). The filling portion (1431) is connected to the side of the side insulating portion (143) near the electrode assembly (130). The electrode assembly (130) includes a first electrode body (131) and a second electrode body (132) arranged along the second direction (Y), a gap (133) is formed between the first electrode body (131), the second electrode body (132) and the side insulation portion (143), the filling portion (1431) is located in the gap (133) and the filling portion (1431) abuts against the first electrode body (131) and the second electrode body (132).

2. The single-cell battery according to claim 1, characterized in that, The first electrode body (131) includes a first arc-shaped portion (1311), and the second electrode body (132) includes a second arc-shaped portion (1321). The gap (133) is formed between the first arc-shaped portion (1311), the second arc-shaped portion (1321), and the side insulating portion (143). The filling portion (1431) is provided with a first arc-shaped groove (14311) and a second arc-shaped groove (14312). The first arc-shaped groove (14311) and the second arc-shaped groove (14312) are spaced apart along the second direction (Y). The first arc-shaped portion (1311) is located in the first arc-shaped groove (14311), and the second arc-shaped portion (1321) is located in the second arc-shaped groove (14312).

3. The single-cell battery according to claim 1, characterized in that, The insulating layer (140) further includes a bottom insulating portion (141) and a large insulating portion (142) connected together. The bottom insulating portion (141) is located at one end of the electrode assembly (130) away from the top cover (120), and the side insulating portion (143) is connected to the bottom insulating portion (141). The large insulating portion (142) is located on the side of the electrode assembly (130) along the second direction (Y), and the large insulating portion (142) is connected to the side insulating portion (143). The single cell (100) also includes an insulating component (160), which is disposed inside the housing (110) and located on the side of the top cover (120) near the electrode assembly (130). The large surface insulating part (142) is fixedly connected to the insulating component (160).

4. The single-cell battery according to claim 3, characterized in that, The large surface insulation portion (142) includes an overlap portion (144), a portion of which is fixedly connected to the side insulation portion (143) on the side away from the electrode assembly (130) along the first direction (X).

5. The single-cell battery according to claim 4, characterized in that, The single cell (100) also includes an insulating adhesive layer (150), a notch (145) is formed between the bottom insulating portion (141), the side insulating portion (143) and the overlapping portion (144), a portion of the insulating adhesive layer (150) is fixedly connected to the side of the overlapping portion (144) away from the side insulating portion (143), and the insulating adhesive layer (150) covers the notch (145).

6. The single-cell battery according to claim 5, characterized in that, The insulating adhesive layer (150) includes a first insulating adhesive portion (151) and a second insulating adhesive portion (152) connected together. The first insulating adhesive portion (151) is fixedly connected to the overlapping portion (144), and the second insulating adhesive portion (152) is fixedly connected to the side of the bottom insulating portion (141) opposite to the electrode assembly (130).

7. The single-cell battery according to claim 6, characterized in that, The insulating adhesive layer (150) further includes a third insulating adhesive layer (153) that is connected to the first insulating adhesive layer (151) and the second insulating adhesive layer (152) respectively. The third insulating adhesive layer (153) is fixedly connected to the large surface insulating layer (142) along the second direction (Y) away from the electrode assembly (130).

8. The single-cell battery according to claim 3, characterized in that, The large surface insulating part (142) includes a large surface connecting part (147) and a bottom connecting part (146) connected together. The bottom connecting part (146) is integrally formed with the large surface connecting part (147). The large surface connecting part (147) is connected to the side insulating part (143). The bottom connecting part (146) is fixedly connected to the bottom surface insulating part (141) on the side away from the electrode assembly (130).

9. The single-cell battery according to claim 1, characterized in that, The filling portion (1431) and the side insulation portion (143) are integrally formed.

10. A battery pack, characterized in that, Includes the single cell (100) according to any one of claims 1 to 8.

Images