Single battery, battery pack and power utilization device

Abstract

The utility model discloses a single battery, a battery pack and an electric device, and relates to the technical field of batteries. Each single battery has an X direction, a Y direction and a Z direction which are vertical in pairs. The single battery comprises a shell, a cover body, a battery cell and a supporting piece, the shell is provided with a containing cavity with an opening, a bottom wall is arranged at the end, away from the opening, of the shell in the Z direction, an anti-explosion valve is arranged on the bottom wall, and the bottom shell is further provided with a side wall in the X direction or the Y direction. The cover body covers the opening; the battery cell is positioned in the accommodating cavity; the supporting piece is fixed to the side wall, the supporting piece and the bottom wall of the shell are arranged at an interval in the Z direction, so that a first space is formed between the supporting piece and the bottom wall, the battery cell is arranged on the supporting piece and located between the anti-explosion valve and the cover body, and the supporting piece enables the battery cell and the anti-explosion valve to form a second space communicated with the first space at an interval in the Z direction. According to the single battery provided by the invention, gas can be gathered in the area of the anti-explosion valve, so that the top cover is prevented from being exploded, and the safety performance of the new energy vehicle is guaranteed.

Description

Technical Field

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

[0002] With the continuous development of the new energy vehicle industry, the requirements for battery energy density and safety in new energy vehicles are becoming increasingly stringent. To improve the safety of new energy vehicles, batteries currently typically employ a thermoelectric separation scheme with the terminals facing upwards and the explosion-proof valve facing downwards.

[0003] Batteries often use support components to separate the bottom wall of the battery from the internal cells. When the battery adopts a thermoelectric separation scheme with the terminals facing upwards and the explosion-proof valve facing downwards, the cells press the support components tightly against the bottom wall of the battery due to their own weight. This can easily cause the explosion-proof valve to be blocked by the support components, thereby reducing the venting efficiency. It can also easily cause gas to accumulate in the top cover area of ​​the cells, causing the top cover to burst open, affecting the safety performance of new energy vehicles. Utility Model Content

[0004] In order to achieve the above objectives, this application aims to provide a single battery cell, a battery pack, and an electrical device, which solves the technical problem in the prior art where the explosion-proof valve is easily blocked by the support member, resulting in reduced exhaust efficiency and the top cover bursting open, thereby causing the battery to easily explode.

[0005] The technical solution adopted is as follows:

[0006] In a first aspect, embodiments of this application provide a single-cell battery having two perpendicular X, Y, and Z directions, including:

[0007] The housing has an opening in the receiving cavity, and the housing has a bottom wall at the end in the Z direction away from the opening. The bottom wall is provided with an explosion-proof valve, and the housing also has a side wall in the X or Y direction.

[0008] The cover is sealed to the opening;

[0009] The battery cell is located within the receiving cavity;

[0010] A support member is fixed to the side wall, and the support member and the bottom wall of the housing are spaced apart in the Z direction to form a first space between the support member and the bottom wall. The battery cell is disposed on the support member and located between the explosion-proof valve and the cover. The support member also makes the battery cell and the explosion-proof valve spaced apart in the Z direction to form a second space, which is connected to the first space.

[0011] In one embodiment of the first aspect, the support member is conductive, and the single cell further includes an insulating member disposed between the support member and the cell.

[0012] In one embodiment of the first aspect, the support member is provided with a first snap-fit ​​portion, and the insulating member is provided with a second snap-fit ​​portion that cooperates with the first snap-fit ​​portion.

[0013] In one embodiment of the first aspect, the first snap-fit ​​portion is provided with a snap-fit ​​groove, the snap-fit ​​groove being located on the side of the support member opposite to the battery cell; the second snap-fit ​​portion is provided with a snap hook, a portion of the snap hook being located within the snap-fit ​​groove.

[0014] In one embodiment of the first aspect, the support member includes a connecting portion and a supporting portion connected to the connecting portion, the connecting portion being connected to the side wall, the supporting portion and the bottom wall being spaced apart in the Z direction to form a first space between the supporting portion and the bottom wall, and the battery cell being disposed on the supporting portion.

[0015] In one embodiment of the first aspect, the insulating member includes a first insulating portion and a second insulating portion, the first insulating portion being connected to the second insulating portion, the first insulating portion being located between the support portion and the battery cell in the Z direction, and the second insulating portion being located between the connecting portion and the battery cell in the X or Y direction.

[0016] In one embodiment of the first aspect, the first insulating portion has a first vent groove on the side facing the battery cell, the first vent groove having at least one and extending along the X direction or the Y direction; and / or

[0017] The second insulating portion has a second vent groove on the side facing the battery cell, and the second vent groove has at least one and extends along the Z direction.

[0018] In one embodiment of the first aspect, at least two supports are provided, spaced apart along the X direction, and the explosion-proof valve is located between two of the supports along the X direction.

[0019] Secondly, embodiments of this application also provide a battery pack, including the single battery cells described in any of the above embodiments.

[0020] Thirdly, embodiments of this application also provide an electrical device, including the battery pack described in the above embodiments.

[0021] The beneficial effects of this application are as follows: This application proposes a single-cell battery, which has two perpendicular X, Y, and Z directions. The single-cell battery includes a casing, a cover, a cell, and a support member. The casing has an open receiving cavity. The casing has a bottom wall at the end away from the opening in the Z direction, and the bottom wall has an explosion-proof valve. The casing also has a side wall in the X or Y direction. The cover seals the opening, and the cell is located in the receiving cavity. By fixing the support member to the side wall and spaced apart from the bottom wall in the Z direction, a first space extending to the explosion-proof valve is formed. The cell is placed on the support member and located between the explosion-proof valve and the cover. Since the cell is supported by the support member in the Z direction, it is equivalent to the support member raising the cell relative to the bottom wall in the Z direction, thereby forming a second space between the cell and the explosion-proof valve, and the second space is connected to the first space. In this way, when the battery cell experiences thermal runaway and generates gas, the existence of the first space not only prevents the support from blocking the area of ​​the explosion-proof valve, but also increases the space at the bottom of the housing. Since the first space extends to the explosion-proof valve through the second space, the gas can accumulate in the area of ​​the explosion-proof valve, preventing the gas from accumulating in the area of ​​the cover and causing the cover to burst open. At the same time, when the explosion-proof valve bursts, the gas in the first space and the second space where the explosion-proof valve is located can be discharged more quickly, minimizing the risk of explosion. Attached Figure Description

[0022] 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.

[0023] Figure 1 A perspective view of a single cell in some embodiments of this application is shown;

[0024] Figure 2 The diagram shows a cross-sectional view of a single cell in some embodiments of this application;

[0025] Figure 3 It shows Figure 2 Enlarged schematic diagram of the structure of section A in the middle;

[0026] Figure 4 Explosion diagrams of individual cells in some embodiments of this application are shown;

[0027] Figure 5 A perspective view of the support and insulating components in some embodiments of this application is shown;

[0028] Figure 6 It shows Figure 5 Enlarged schematic diagram of the structure of section B in the middle;

[0029] Figure 7 It shows Figure 5 Enlarged schematic diagram of the C-section structure.

[0030] Explanation of key component symbols:

[0031] 100-cell battery;

[0032] 110 - Housing; 111 - Receiving cavity; 112 - Opening; 113 - Explosion-proof valve; 114 - Bottom wall; 115 - First space; 116 - Side wall;

[0033] 120 - Cover;

[0034] 130-cell;

[0035] 140 - Support member; 141 - Support part; 142 - Connecting part; 143 - First snap-fit ​​part; 1431 - Slot;

[0036] 150 - Insulating component; 151 - First insulating part; 1511 - First venting groove; 152 - Second insulating part; 1521 - Second venting groove; 153 - Second snap-fit ​​part; 1531 - Snap hook. Detailed Implementation

[0037] The embodiments of this application are described in detail below. Examples of the 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] like Figure 1 and Figure 2 As shown, an embodiment of this application provides a single battery cell 100, mainly used in a battery pack, which is primarily used in electrical devices. The single battery cell 100 has two perpendicular X, Y, and Z directions, and includes: a housing 110, a cover 120, a cell 130, and a support member 140.

[0043] See also Figure 3 and Figure 4 The housing 110 has a receiving cavity 111 with an opening 112. The housing 110 has a bottom wall 114 at the end in the Z-direction away from the opening 112, and the bottom wall 114 has an explosion-proof valve 113. The housing 110 also has a side wall 116 in the X-direction or the Y-direction. The cover 120 seals the opening 112, and the battery cell 130 is located within the receiving cavity 111. The support member 140 is fixed to the side wall 116, and the support member 140 and the bottom wall 114 of the housing 110 are spaced apart in the Z-direction to form a first space 115. The battery cell 130 is disposed on the support member 140 and located between the explosion-proof valve 113 and the cover 120. The support member 140 also creates a second space in the Z-direction between the battery cell 130 and the explosion-proof valve 113, which communicates with the first space 115.

[0044] The single-cell battery 100 provided in the embodiments of this application forms a first space 115 that communicates with the second space in the area where the explosion-proof valve 113 is located by fixing the support member 140 to the side wall 116 of the housing 110 and spaced apart from the bottom wall 114 of the housing 110 in the Z direction. The battery cell 130 is disposed on the support member 140 and located between the explosion-proof valve 113 and the cover 120. When the battery cell 130 undergoes thermal runaway and generates gas, the presence of the first space 115 not only prevents the support member 140 from blocking the area of ​​the explosion-proof valve 113, but also increases the space at the bottom of the housing 110. Since the first space 115 communicates with the second space in the area where the explosion-proof valve 113 is located, the gas in the first space 115 can reach the second space in the area where the explosion-proof valve 113 is located and accumulate, preventing the gas from accumulating in the area of ​​the cover 120 and causing the cover 120 to explode. At the same time, when the explosion-proof valve 113 explodes, the gas in the first space 115 and the second space in the area of ​​the explosion-proof valve 113 can be discharged more quickly, minimizing the risk of explosion.

[0045] Understandably, by setting the support member 140 to space the cell 130 and the bottom wall 114 of the casing 110 in the Z-direction, the contact area between the bottom wall of the cell 130 and the electrolyte in the receiving cavity 111 can be effectively increased, thereby improving the electrolyte wetting speed and enhancing the cycle performance of the cell 130. Simultaneously, it can prevent the cell 130 from contacting the casing 110 or metal shavings, electrode powder, etc., that have fallen onto the bottom wall 114 of the casing 110. This reduces the risk of short circuits caused by contact between the cell 130 and the casing 110, and also reduces the risk of galvanic reactions formed by contact between the cell 130 and metal shavings, electrode powder, etc., leading to corrosion of the casing 110 and electrolyte leakage. This further enhances the safety of the single-cell battery 100.

[0046] like Figure 2 , Figure 3 and Figure 4 As shown, in one embodiment of this application, the support member 140 is conductive, and the single cell 100 further includes an insulating member 150, which is disposed between the support member 140 and the cell 130.

[0047] In this embodiment, the support member 140 is conductive. By providing an insulating member 150 between the support member 140 and the battery cell 130 on the support member 140, the battery cell 130 is isolated from the support member 140 under the insulating effect of the insulating member 150, thereby avoiding the risk of short circuit caused by the battery cell 130 being electrically connected to the housing 110 through the support member 140.

[0048] For example, the insulating element 150 may be made of any one or a combination of polyester, polyimide, phenolic resin, polybutadiene, and polyethylene.

[0049] like Figure 3 and Figure 5 As shown in the above embodiments of this application, the support member 140 is provided with a first snap-fit ​​portion 143, and the insulating member 150 is provided with a second snap-fit ​​portion 153 that cooperates with the first snap-fit ​​portion 143.

[0050] In this embodiment, by providing a first latching portion 143 on the support member 140 and a second latching portion 153 that cooperates with the first latching portion 143 on the insulating member 150, the insulating member 150 is securely mounted on the support member 140 under the latching action of the second latching portion 153 and the first latching portion 143, thereby ensuring insulation stability and avoiding the risk of short circuit caused by the battery cell 130 being electrically connected to the housing 110 through the support member 140.

[0051] In other embodiments, the insulating element 150 may be an insulating coating provided on the support element 140.

[0052] like Figure 6 and Figure 7 As shown, in the above embodiments of this application, the first snap-fit ​​portion 143 is provided with a snap-fit ​​groove 1431, the snap-fit ​​groove 1431 is located on the side of the support member 140 away from the battery cell 130; the second snap-fit ​​portion 153 is provided with a snap hook 1531, a part of the snap hook 1531 is located in the snap-fit ​​groove 1431.

[0053] In this embodiment, a slot 1431 is provided on the first latching portion 143 on the side of the support member 140 facing away from the battery cell 130, and a portion of hooks 1531 are provided on the second latching portion 153 within the slot 1431. This allows the hooks 1531 to cover both the edge of the support member 140 facing away from the battery cell 130 and the circumferential edge of the support member 140, thereby isolating the edge of the support member 140 facing away from the battery cell 130 and the circumferential edge of the support member 140 from contact with the battery cell 130. This further reduces the risk of a short circuit caused by the battery cell 130 being electrically connected to the housing 110 through the support member 140.

[0054] like Figure 2 and Figure 3 As shown in the above embodiments of this application, the housing 110 has a sidewall 116 in the X direction or the Y direction; the support member 140 includes a connecting portion 142 and a support portion 141 connected to the connecting portion 142, the connecting portion 142 is connected to the sidewall 116, the support portion 141 and the bottom wall 114 are spaced apart in the Z direction so that a first space 115 is formed between the support portion 141 and the bottom wall 114, and the battery cell 130 is disposed on the support portion 141.

[0055] In this embodiment, the housing 110 has a sidewall 116 in the X or Y direction, and the support member 140 includes a connecting part 142 and a support part 141 connected to the connecting part 142. By connecting the connecting part 142 to the sidewall 116, the support member 140 is stably mounted on the sidewall 116 of the housing 110, so as to ensure that the support part 141 and the bottom wall 114 of the housing 110 are spaced apart in the Z direction, thereby ensuring that the battery cell 130 mounted on the support part 141 and the bottom wall 114 of the housing 110 are spaced apart in the Z direction, thereby ensuring the exhaust efficiency and preventing the single battery 100 from exploding.

[0056] For example, the support portion 141 and the connecting portion 142 can be connected by welding, sheet metal bending, or integral injection molding. The connecting portion 142 can be connected to the side wall 116 of the housing 110 by welding or integral injection molding.

[0057] Combination Figure 4 and Figure 5 In the embodiment shown, the housing 110 has a sidewall 116 in the X direction, a connecting portion 142 extends in the Z direction and is welded and fixed to the sidewall 116, and a support portion 141 forms a first space 115 with the bottom wall 114 in the Z direction.

[0058] like Figure 2 , Figure 3 and Figure 5 As shown in the above embodiments of this application, the insulating member 150 includes a first insulating part 151 and a second insulating part 152. The first insulating part 151 is connected to the second insulating part 152. The first insulating part 151 is located between the support part 141 and the battery cell 130 in the Z direction, and the second insulating part 152 is located between the connecting part 142 and the battery cell 130 in the X direction or the Y direction.

[0059] In this embodiment, the first insulating part 151 and the second insulating part 152 are connected to adapt to the support part 141 and the connecting part 142. By placing the first insulating part 151 between the support part 141 and the cell 130, the bottom wall of the cell 130 is isolated from the support part 141 by the insulation effect of the first insulating part 151. This avoids the risk of short circuit caused by the bottom wall of the cell 130 being electrically connected to the housing 110 through the support part 141 and the connecting part 142 in sequence, effectively improving the safety of the single cell 100.

[0060] Meanwhile, by providing the second insulating part 152 between the connecting part 142 and the cell 130, the side wall of the cell 130 near the connecting part 142 is isolated from the connecting part 142 by the insulating effect of the second insulating part 152, thereby avoiding the risk of short circuit caused by the side wall of the cell 130 near the connecting part 142 being electrically connected to the casing 110 through the connecting part 142, effectively improving the safety of the single cell 100.

[0061] For example, the first insulating part 151 and the second insulating part 152 can be connected by integral injection molding or by snap-fit.

[0062] like Figure 3 and Figure 5 As shown in the above embodiments of this application, the first insulating portion 151 has a first venting groove 1511 on the side facing the battery cell 130, and the first venting groove 1511 has at least one and extends along the X direction or the Y direction.

[0063] The second insulating portion 152 has a second venting groove 1521 on the side facing the cell 130, and the second venting groove 1521 has at least one and extends along the Z direction.

[0064] In this embodiment, by opening a first exhaust groove 1511 extending in the X or Y direction on the side of the first insulating portion 151 facing the cell 130, the high-temperature gas generated by thermal runaway of the bottom wall of the cell 130 on the support portion 141 can be discharged into the first space 115 in the X or Y direction through the first exhaust groove 1511, and then quickly discharged from the first space 115 and the second space through the explosion-proof valve 113. This improves exhaust efficiency, reduces the probability of the single battery 100 exploding, and enhances the safety performance of new energy vehicles. By setting the number of first exhaust grooves 1511 to at least one, the exhaust area of ​​the bottom wall of the cell 130 on the support portion 141 can be effectively increased, thereby further improving exhaust efficiency, further reducing the probability of the single battery 100 exploding, and further enhancing the safety performance of new energy vehicles.

[0065] By creating a second exhaust groove 1521 extending in the Z direction on the side of the second insulation portion 152 facing the cell 130, and having the second exhaust groove 1521 communicating with the first exhaust groove 1511, high-temperature gas generated by thermal runaway of the side wall of the cell 130 near the connection portion 142 can be discharged into the first exhaust groove 1511 in the Z direction through the second exhaust groove 1521, and then discharged into the first space 115 in the X or Y direction through the first exhaust groove 1511. Finally, it is quickly discharged from the first space 115 and the second space through the explosion-proof valve 113, improving exhaust efficiency, reducing the probability of the single battery 100 exploding, and enhancing the safety performance of new energy vehicles. By setting the number of second exhaust grooves 1521 to at least one, the exhaust area of ​​the side wall of the cell 130 near the connection portion 142 can be effectively increased, thereby further improving exhaust efficiency, further reducing the probability of the single battery 100 exploding, and further enhancing the safety performance of new energy vehicles.

[0066] like Figure 5 In the illustrated embodiment, the first insulating portion 151 has a plurality of first venting grooves 1511 on the side facing the battery cell 130. The first venting grooves 1511 extend along the X direction, and the plurality of first venting grooves 1511 are spaced apart along the Y direction. The second insulating portion 152 has a plurality of second venting grooves 1521 on the side facing the battery cell 130. The second venting grooves 1521 extend along the Z direction, and the plurality of second venting grooves 1521 are spaced apart along the Y direction.

[0067] like Figure 2 and Figure 4 As shown, in any of the above embodiments of this application, at least two support members 140 are provided, and the explosion-proof valve 113 is located between two of the support members along the X direction.

[0068] In this embodiment, by setting the number of support members 140 to at least two, the stability and balance of the support for the battery cell 130 can be effectively improved, thereby ensuring that the battery cell 130 set on the support part 141 and the bottom wall 114 of the housing 110 are spaced apart in the Z direction, thus ensuring the exhaust efficiency and effectively preventing the explosion of the single battery cell 100.

[0069] Meanwhile, along the X-axis, support members 140 are spaced apart, with an explosion-proof valve 113 positioned between two of the support members 140. In this way, when the battery cell 130 experiences thermal runaway, the high-temperature gases generated on both sides of the battery cell 130 along the X-axis can flow through the first space towards the explosion-proof valve 113 and be quickly discharged through the valve, effectively improving exhaust efficiency, reducing the probability of a single battery cell explosion, and enhancing the safety performance of new energy vehicles.

[0070] like Figure 4As shown, there are two support members 140, which are spaced apart along the X direction. On the one hand, they support the battery cell 130, and on the other hand, they form a space in the area where the explosion-proof valve 113 is located, which facilitates the accumulation of gas at the location of the explosion-proof valve 113 and the exhaust of gas after the explosion-proof valve 113 is opened.

[0071] Embodiments of this application also provide a battery pack, including the single battery cell 100 in any of the above embodiments.

[0072] 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.

[0073] 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.

[0074] Embodiments of this application also provide an electrical device, including the battery pack described in the above embodiments.

[0075] The electrical device has the battery pack described in the above embodiments, and therefore has all the beneficial effects of the battery pack, which will not be elaborated here.

[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 having two perpendicular X-axis, Y-axis, and Z-axis directions, characterized in that, include: The housing (110) is provided with a receiving cavity (111) having an opening (112). The housing (110) has a bottom wall (114) at one end in the Z direction away from the opening (112). The bottom wall (114) is provided with an explosion-proof valve (113). The housing (110) also has a side wall (116) in the X direction or the Y direction. A cover (120) is provided to seal the opening (112); The battery cell (130) is located within the receiving cavity (111); A support member (140) is fixed to the side wall (116), and the support member (140) and the bottom wall (114) are spaced apart in the Z direction to form a first space (115) between the support member (140) and the bottom wall (114). The battery cell (130) is disposed on the support member (140) and located between the explosion-proof valve (113) and the cover (120). The support member (140) makes the battery cell (130) and the explosion-proof valve (113) spaced apart in the Z direction to form a second space, and the second space communicates with the first space (115).

2. The single-cell battery according to claim 1, characterized in that, The support member (140) is conductive, and the single cell (100) also includes an insulating member (150), which is disposed between the support member (140) and the cell (130).

3. The single-cell battery according to claim 2, characterized in that, The support member (140) is provided with a first snap-fit ​​portion (143), and the insulating member (150) is provided with a second snap-fit ​​portion (153) that cooperates with the first snap-fit ​​portion (143).

4. The single-cell battery according to claim 3, characterized in that, The first snap-fit ​​part (143) is provided with a snap-fit ​​groove (1431), which is located on the side of the support member (140) away from the battery cell (130); the second snap-fit ​​part (153) is provided with a snap hook (1531), a part of which is located in the snap-fit ​​groove (1431).

5. The single-cell battery according to claim 2, characterized in that, The support member (140) includes a connecting part (142) and a support part (141) connected to the connecting part (142). The connecting part (142) is connected to the side wall (116). The support part (141) and the bottom wall (114) are spaced apart in the Z direction so that the first space (115) is formed between the support part (141) and the bottom wall (114). The battery cell (130) is disposed on the support part (141).

6. The single-cell battery according to claim 5, characterized in that, The insulating component (150) includes a first insulating portion (151) and a second insulating portion (152). The first insulating portion (151) is connected to the second insulating portion (152). The first insulating portion (151) is located between the support portion (141) and the battery cell (130) in the Z direction. The second insulating portion (152) is located between the connecting portion (142) and the battery cell (130) in the X direction or the Y direction.

7. The single-cell battery according to claim 6, characterized in that, The first insulating portion (151) has a first venting groove (1511) on the side facing the battery cell (130), and the first venting groove (1511) has at least one and extends along the X direction or the Y direction; and / or The second insulating portion (152) has a second vent groove (1521) on the side facing the battery cell (130), and the second vent groove (1521) has at least one and extends along the Z direction.

8. The single-cell battery according to any one of claims 1 to 7, characterized in that, At least two support members (140) are provided, and the support members (140) are spaced apart along the X direction, with the explosion-proof valve (113) located between two of the support members (140) along the X direction.

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

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9.

Images