Battery partition lining device, battery monomer, battery pack and electric equipment

Abstract

The utility model discloses a battery partition lining device, a battery monomer, a battery pack and electric equipment. The battery partition lining device comprises a supporting part and an adsorption part, the supporting part is made of an insulating material, and the supporting part is used for being attached to a shell of a battery monomer; the adsorption part is fixedly connected with the supporting part, has a porous structure and can adsorb electrolyte, and the adsorption part is used for being attached to a pole core of a battery monomer. According to the utility model, the battery partition lining device with the porous structure is arranged in the battery, so that electrolyte infiltration is facilitated, and the pole core infiltration efficiency and the infiltration uniformity are improved.

Description

Technical Field

[0001] The present utility model generally relates to the technical field of batteries, and more specifically to a battery separator device, a battery cell, a battery pack, and an electrical device. Background Art

[0002] New energy vehicles have become one of the strategic emerging industries. Electric vehicles are the main body of new energy vehicles, and power batteries are an important power source for electric vehicles. The power performance, safety performance, and cycle life of power batteries are closely related to the internal structure, especially the structural performance of the electrode core.

[0003] Currently, the thickness and hardness of the electrode core are controlled by hot pressing the electrode core to ensure the assemblability and assembly efficiency of the electrode core into the shell (assembling as many electrode cores as possible in a limited space to increase the battery capacity). However, hot pressing the electrode core will cause the positive electrode sheet, negative electrode sheet, and separator to adhere tightly, making it difficult for the subsequent electrolyte to infiltrate. This is particularly evident in the later stage of the cycle after the battery PACK is installed, where the lack of electrolyte is more common and severe, and local lithium dendrites will precipitate, making the battery have a high risk of use.

[0004] Therefore, it is necessary to provide a battery separator device, a battery cell, a battery pack, and an electrical device to at least partially solve the above problems. Summary of the Utility Model

[0005] A series of simplified concepts are introduced in the Summary of the Utility Model section, which will be further elaborated in the Detailed Implementation section. The Summary of the Utility Model section of the present utility model does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of the present utility model provides a battery separator device, comprising:

[0007] A support part, the material of the support part is an insulating material, and the support part is used to fit the outer shell of the battery cell;

[0008] An adsorption part, the adsorption part is fixedly connected to the support part, the adsorption part has a porous structure capable of adsorbing electrolyte, and the adsorption part is used to fit the electrode core of the battery cell.

[0009] Optionally, the support part and the adsorption part are integrally formed or separately formed and combined together.

[0010] Optionally, the support part includes a first side plate, the material of the first side plate is an insulating material, and the first side plate is used to fit the outer shell of the battery cell;

[0011] The adsorption part includes a second side plate, which is fixedly connected to the first side plate. The second side plate has a porous structure and can adsorb the electrolyte. The second side plate is used to fit against the electrode core of the battery cell.

[0012] Optionally, the battery separator device is used to lead out the tab of the electrode core and further includes:

[0013] A lead-out hole that penetrates through the support part and the adsorption part along the thickness direction of the battery separator device, and the lead-out hole can pass through the tab.

[0014] Optionally, the battery separator device further includes:

[0015] A protruding part that is arranged on the support part and protrudes from the support part around the lead-out hole.

[0016] Optionally, the thickness H1 of the support part ≥ 0.3 mm;

[0017] And / or, the thickness H2 of the adsorption part ≥ 1 mm;

[0018] And / or, the height H3 of the protruding part ≥ 0.3 mm.

[0019] Optionally, the material of the first side plate is PP;

[0020] And / or, the material of the second side plate is aerogel or fiber porous material.

[0021] Optionally, the battery separator device is used to separate the electrode core from the outer shell and further includes:

[0022] A plurality of through holes that penetrate through the support part and the adsorption part along the thickness direction of the battery separator device, and the plurality of through holes are used for the electrolyte to flow through.

[0023] A battery cell according to an aspect of the present invention includes the battery separator device according to any one of the above technical solutions.

[0024] Optionally, the battery cell further includes:

[0025] An electrode core, and the battery separator device is arranged at the end of the electrode core;

[0026] A tab, which is arranged at the end of the electrode core and passes through the lead-out hole of the battery separator device.

[0027] Optionally, the battery cell further includes:

[0028] An outer shell;

[0029] The electrode core is disposed in the housing, and the battery separator device is disposed on the side of the electrode core and between the electrode core and the housing.

[0030] The third aspect of the present invention provides a battery pack, including the battery cell described in any one of the above technical solutions.

[0031] The fourth aspect of the present invention provides an electrical device, including:

[0032] The battery separator device described in any one of the above technical solutions; or

[0033] The battery cell described in any one of the above technical solutions; or

[0034] The battery pack described in any one of the above technical solutions.

[0035] According to a battery separator device, a battery cell, a battery pack, and an electrical device of the present invention, the battery separator device is provided with an adsorption part having a porous structure. The porous structure can be used to store the electrolyte, increase the retention of the electrolyte. The porous structure is composed of a plurality of tiny channels, and these channels can imitate the function of a capillary tube, so that the electrolyte can be adsorbed and flow along these tiny channels, which can help the electrolyte to be distributed uniformly at an accelerated rate, prevent accumulation at the bottom of the battery housing, thereby accelerating the uniform wetting of each area in the electrode core by the electrolyte liquid, and improving the wetting efficiency and uniformity of the electrode core. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The following drawings of the embodiments of the present invention are used as a part of the present invention to understand the present invention. The embodiments of the present invention are shown in the drawings and their descriptions are used to explain the principles of the present invention. In the drawings,

[0037] Figure 1 is the front view of a battery spacer according to a preferred embodiment of the present invention;

[0038] Figure 2 is the top view of a battery spacer according to a preferred embodiment of the present invention;

[0039] Figure 3 is the left view of a battery spacer according to a preferred embodiment of the present invention;

[0040] Figure 4 is the perspective view of a battery spacer according to a preferred embodiment of the present invention;

[0041] Figure 5 is Figure 3 the cross-sectional view along A-A in

[0042] Figure 6 isFigure 5 Partial enlarged view in

[0043] Figure 7 Front view of a battery separator according to a preferred embodiment of the present utility model;

[0044] Figure 8 Front view of a battery lining plate according to a preferred embodiment of the present utility model;

[0045] Figure 9 Rear view of a battery lining plate according to a preferred embodiment of the present utility model;

[0046] Figure 10 Front view of a battery cell according to a preferred embodiment of the present utility model;

[0047] Figure 11 Front view of a battery cell according to a preferred embodiment of the present utility model;

[0048] Figure 12 Front view of a battery cell according to a preferred embodiment of the present utility model;

[0049] Figure 13 Isometric view of a battery module according to a preferred embodiment of the present utility model;

[0050] Figure 14 Exploded view of a battery module according to a preferred embodiment of the present utility model.

[0051] Explanation of reference numerals:

[0052] 1: Battery separator 101: First side plate

[0053] 102: Second side plate 103: Lead-out hole

[0054] 104: Protruding portion 2: Battery lining plate

[0055] 201: First side plate 202: Second side plate

[0056] 203: Through hole 3: Battery cell

[0057] 301: Outer shell 302: Core

[0058] 303: Tab 304: Electrolyte

[0059] 4: Battery module Detailed implementation manners

[0060] In the following description, numerous specific details are given to provide a more thorough understanding of the present utility model. However, it will be apparent to those skilled in the art that the present utility model can be practiced without one or more of these details. In other instances, some technical features well known in the art are not described to avoid obscuring the present utility model.

[0061] To thoroughly understand the present utility model, a detailed description will be presented in the following. It should be understood that these embodiments are provided to make the disclosure of the present utility model thorough and complete, and to fully convey the concept of these exemplary embodiments to those of ordinary skill in the art. Obviously, the implementation of the embodiments of the present utility model is not limited to the specific details familiar to those skilled in the art. The preferred embodiments of the present utility model are described in detail below. However, in addition to these detailed descriptions, the present utility model can also have other embodiments.

[0062] The ordinal numbers such as "first" and "second" cited in the present utility model are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" itself does not imply the existence of a "second component", and the term "second component" itself does not imply the existence of a "first component".

[0063] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used in the present utility model are for illustrative purposes only and not for limitation.

[0064] The present utility model discloses a battery separator device, a battery cell, a battery pack and an electrical device.

[0065] Now, exemplary embodiments according to the present utility model will be described in more detail with reference to the accompanying drawings.

[0066] In a preferred embodiment, a battery separator device includes: a support portion and an adsorption portion;

[0067] The support portion is made of an insulating material. The support portion is used to fit against the outer shell 301 of the battery cell 3, which can play a role in supporting the adsorption portion and the electrode core, and can also play a role in physically insulating the electrode core 302 from the outer shell 301;

[0068] The adsorption portion is fixedly connected to the support portion. The adsorption portion has a porous structure capable of adsorbing the electrolyte. The adsorption portion is used to fit against the electrode core 302 of the battery cell, which can help the electrolyte to be distributed evenly more quickly and prevent it from accumulating at the bottom of the battery outer shell.

[0069] The battery separator device can be used at the end of the electrode core 302 to shape the lead-out of the tab 303, and can also be used at the side of the electrode core 302 and located between the electrode core 302 and the battery case 301, playing a role in supporting the electrode core 302 and also playing a role in physically insulating the electrode core 302 from the case 301.

[0070] The battery separator device in this embodiment is provided with an adsorption part having a porous structure. The porous structure can be used to store the electrolyte, increasing the retention of the electrolyte. The porous structure is composed of a plurality of tiny channels, and these channels can mimic the function of capillaries, enabling the electrolyte to be adsorbed and flow along these tiny channels, which can help the electrolyte to be distributed uniformly more quickly, prevent it from accumulating at the bottom of the battery case 301, thereby accelerating the uniform infiltration of the electrolyte in each area of the electrode core and improving the infiltration efficiency and uniformity of the electrode core.

[0071] In one embodiment, the support part and the adsorption part are integrally formed or are formed separately and combined together.

[0072] When the support part and the adsorption part are integrally formed, the adsorption part can be formed by machining a porous structure on one side of a plate body, and the opposite side has a solid structure to form the support part.

[0073] When the support part and the adsorption part are formed separately and combined together, they can be combined and connected by two plate bodies. One of the plate bodies has a porous structure to form the adsorption part, and the other plate body has a solid structure to form the support part. The shapes and areas of the two plate bodies are the same, which is convenient for combined connection.

[0074] In one embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 shown, the support part includes a first side plate. The material of the first side plate is an insulating material, which can play a role in supporting the adsorption part and the electrode core, and can also play a role in physically insulating the electrode core 302 from the case 301;

[0075] The adsorption part includes a second side plate. The second side plate is fixedly connected to the first side plate. The second side plate has a porous structure capable of adsorbing the electrolyte. The adsorption part is used to fit the electrode core 302 of the battery cell, which can help the electrolyte to be distributed uniformly more quickly and prevent it from accumulating at the bottom of the battery case.

[0076] In one embodiment, as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown, the battery separator device can be a battery spacer 1. The battery spacer 1 is arranged at the end of the electrode core 302, which can shape the lead-out of the electrode tab 303, prevent the risk of positive and negative electrode contact caused by the bending and scattering of the electrode tab 303, and can also play the functions of supporting the electrode core 302 and physically insulating the electrode core 302 from the outer shell 301.

[0077] In one embodiment, as Figure 3 , Figure 4 , Figure 5 , Figure 6 shown, the battery spacer 1 further includes:

[0078] A lead-out hole 103, the lead-out hole 103 penetrates through the first side plate 101 and the second side plate 102 along the thickness direction of the battery spacer 1, and the lead-out hole 103 can pass through the electrode tab 303. The length and width of the lead-out hole 103 can be designed with redundant design corresponding to the thickness of multiple layers of the electrode tab 303, and the four sides of the hole are rounded to prevent cutting the electrode tab 303.

[0079] The number of lead-out holes 103 on the battery spacer 1 is designed according to the number of electrode cores 302. As Figure 3 , Figure 4 shown, four lead-out holes 103 are provided on the battery spacer 1, which can be applicable to four electrode cores 302. As Figure 7 shown, two lead-out holes 103 are provided on the battery spacer 1, which can be applicable to two electrode cores 302.

[0080] In one embodiment, as Figure 1 , Figure 2 , Figure 5 , Figure 6 shown, the battery spacer 1 further includes:

[0081] A protruding part 104, the protruding part 104 is arranged on the first side plate 101 and protrudes from the first side plate 101 around the lead-out hole 103. By providing the protruding part 104, it is convenient for the electrode tab 303 to pass through the shape arrangement and the physical isolation of the electrode tab 303 from the electrode core 302. The protruding part 104 and the first side plate 101 can be integrally formed by injection molding.

[0082] In one embodiment, the thickness H1 of the first side plate 101 ≥ 0.3 mm, and the mechanical strength and chemical stability need to be ensured;

[0083] And / or, the thickness H2 of the second side plate 102 ≥ 1 mm, and the number of micropores needs to be ensured to improve the capillary effect;

[0084] And / or, the height H3 of the protruding part 104 ≥ 0.3 mm.

[0085] Each of the above dimensions can be designed according to the assembly space of the electrode core 302 and is suitable for the assembly of the electrode core 302 in the battery housing 301.

[0086] In one embodiment, the material of the first side plate 101 is PP; the PP material has advantages such as good mechanical strength and chemical stability. The mechanical strength of polypropylene can ensure a certain anti-deformation ability and can withstand the erosion of most acids and alkalis as well as the chemical substances in the electrolyte. Secondly, it can provide physical insulation between the electrode tab 303 and the end face of the electrode core 302 when the lead-out form of the electrode tab 303 is poor.

[0087] In one embodiment, the material of the second side plate 102 is aerogel or fibrous porous material.

[0088] Lightweight porous materials (such as materials with capillary action like aerogel and fibrous materials; aerogel / fibrous materials can be used as support materials for electrolyte absorption of the separator / positive and negative electrodes), its high porosity can be used to store the electrolyte, increase the retention of the electrolyte, and the high porosity of this type of material consists of multiple tiny channels. These channels can mimic the role of capillaries, enabling the electrolyte to be adsorbed and flow along these tiny channels, which can help the electrolyte accelerate uniform distribution (preventing accumulation at the bottom of the housing 301), thereby effectively accelerating the infiltration of the battery cell and ensuring the long-term wettability at the top of the battery cell (continuous consumption of the electrolyte during long-term multiple cycles of the battery will lead to insufficient electrolyte in some areas of the electrode core), reducing the risk of lithium plating during long-term cycling of the battery cell.

[0089] In one embodiment, as Figure 8 、 Figure 9 shown, the battery separator device can be the battery separator plate 2. The battery separator plate 2 is disposed on the side of the electrode core 302 and is located between the electrode core 302 and the battery housing 301, and is used to separate the electrode core 302 from the housing 301, performing the function of supporting and maintaining the overall shape of the electrode core 302, and the function of physically insulating the electrode core 302 from the housing 301.

[0090] In one embodiment, the battery separator plate 2 further includes:

[0091] A plurality of through holes 203, the through holes 203 penetrate through the first side plate 201 and the second side plate 202 along the thickness direction of the battery separator plate 2. The plurality of through holes 203 are used for the circulation of the electrolyte, which can accelerate the absorption of the electrolyte inside and outside the second side plate 202 of the lightweight porous material.

[0092] The battery separator plate 2 plays a role in absorbing the electrolyte, and at the same time plays the role of insulating the battery housing 301 from the electrode core 302. The inner layer is a composite of porous lightweight materials, achieving the effect of uniform distribution of the electrolyte.

[0093] The fixed connection method of the above first side plate and second side plate adopts the following method (not limited to the following composite methods):

[0094] Adhesive compounding: For example, surface treatment of the PP sheet, such as oxidation, coating, punching, etc. to improve the surface adhesiveness. Then apply glue to the surface of the PP sheet so that the fiber is bonded to the PP sheet. The adhesiveness can be thermoplastic or thermosetting, which can provide sufficient bonding force to fix the fiber or porous lightweight materials such as cotton on the PP sheet. Laminating compounding (cold pressing or hot pressing with adhesive, PP sheet and fiber bonded together) or melting compounding (heating the PP sheet above the melting point and then combining it with the fiber, and achieving compounding through cooling and solidification) can also be used for compounding together.

[0095] Such as Figure 10 、 Figure 11 、 Figure 12 As shown, this embodiment also provides a battery cell 3, including the battery separator device described in any one of the above embodiments.

[0096] In one embodiment, the battery separator device can be a battery separator ring 1, and the battery cell 3 further includes:

[0097] A pole core 302, and the battery separator ring 1 is arranged at the end of the pole core 302;

[0098] A pole ear 303, the pole ear 303 is arranged at the end of the pole core 302 and passes through the lead-out hole 103 of the battery separator ring 1.

[0099] In one embodiment, the battery cell 3 further includes:

[0100] A housing 301, the pole core 302 is arranged in the housing 301, and the housing 301 can be an aluminum shell.

[0101] Such as Figure 10 、 Figure 11 As shown, when the electrolytic liquid is just injected into the battery for a period of time (such as within 1 hour), the main part of the electrolytic liquid accumulates in the middle and lower parts of the battery. However, due to the existence of capillary materials on both sides, the electrolytic liquid will climb along the two end faces. During the climbing process of the electrolytic liquid, due to the positive and negative electrode / separator fitting channels and the diffusion effect of the concentration difference in the pole core 302, the electrolytic liquid will diffuse and infiltrate the middle area of the pole core 302.

[0102] Such as Figure 12 As shown, after a period of diffusion (such as 3 hours), the liquid level of the electrolytic liquid in the battery drops significantly, and the pole core 302 is fully infiltrated; this method can proceed in a positive direction all the time. The infiltration efficiency of the electrolytic liquid is also related to temperature, etc. The above description is only an example effect under a unified normal temperature environment.

[0103] In one embodiment, the battery separator device can be the battery lining 2, and the battery cell 3 further includes:

[0104] A pole core 302, the battery lining 2 is disposed on the side of the pole core 302 and is located between the pole core 302 and the outer shell 301.

[0105] As Figure 13 、 Figure 14 shown, this embodiment also provides a battery pack, including the battery cell 3 described in any one of the above embodiments.

[0106] The battery pack usually includes a plurality of battery modules 4, the battery module 4 includes a plurality of battery cells 3, and the plurality of battery cells 3 are connected in parallel or in series.

[0107] This embodiment also provides an electrical device, including the battery pack described in any one of the above embodiments.

[0108] The electrical device can be an automobile, a motorcycle, a moped, a ship, a spacecraft, etc.

[0109] The automobile can be a pure electric vehicle or a hybrid electric vehicle, and a battery pack is provided in the automobile as an energy storage component.

[0110] A battery separator device, a battery cell, a battery pack and an electrical device of the present utility model have the following characteristics:

[0111] The present utility model can not only be applicable to wound pole cores of the VDA type, but also applicable to laminated batteries, soft-pack batteries, etc. For the structural design with similar functions, optimization design such as grooving can be carried out according to the number of pole ear leads.

[0112] Compared with the prior art (without hot pressing and rich liquid electrolyte), the present utility model can increase the utilization rate of the electrolyte by the pole core by about 20%, effectively reducing the use cost of the electrolyte in the battery; secondly, the infiltration efficiency and the uniformity of infiltration of the pole core can be increased by about 40%.

[0113] The present utility model can effectively maintain the lead form of the pole ears for fast charging and the lead-out structure of multiple pole ears, increasing the physical insulation between the pole ear bends and the pole core, and significantly improving the use safety of the battery cell.

[0114] The application surface of the present utility model is relatively flexible, and can be flexibly designed according to the pole ear lead form and the cell size, and is a separate composite spacer structure, with high processing efficiency, low cost, and does not affect the overall structure of the battery.

[0115] The processes and steps described in all of the above preferred embodiments are merely examples. Unless adverse effects occur, various processing operations may be performed in an order different from the order of the above processes. The order of the steps of the above processes may also be increased, combined, or deleted according to actual needs.

[0116] When understanding the scope of the present utility model, the term "comprising" and its derivatives as used herein are intended to be open-ended terms that specify the presence of the recited features, elements, components, groups, wholes, and / or steps, but do not preclude the presence of other unrecited features, elements, components, groups, wholes, and / or steps. This concept also applies to words with similar meanings, such as the terms "including", "having", and their derivatives.

[0117] The term "attached" or "attachment" used herein includes: a configuration in which an element is directly fixed to another element by directly fixing the element to the other element; a configuration in which an element is indirectly fixed to another element by fixing the element to an intermediate member, and the intermediate member is in turn fixed to the other element; and a configuration in which one element is integral with another element, i.e., one element is substantially a part of the other element. This definition also applies to words with similar meanings, such as "connected", "coupled", "joined", "mounted", "adhered", "fixed", and their derivatives. Finally, degree terms such as "substantially", "about", and "approximate" used herein represent the amount of deviation that modifies the term such that the final result is not significantly changed.

[0118] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present utility model. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The features described in one embodiment herein may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0119] The present utility model has been described by the above embodiments, but it should be understood that the above embodiments are only for the purpose of illustration and example, and are not intended to limit the present utility model within the scope of the described embodiments. In addition, those skilled in the art can understand that the present utility model is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present utility model, and these variations and modifications all fall within the scope of protection required by the present utility model.

Claims

1. A battery spacer device, characterized in that: include: A support portion, the material of the support portion is an insulating material, and the support portion is used to fit the outer shell (301) of the battery cell; The adsorption part is fixedly connected to the support part, the adsorption part has a porous structure capable of adsorbing electrolyte, and the adsorption part is used to adhere to the pole core (302) of the battery cell.

2. The battery spacer device according to claim 1, characterized in that: The support portion and the adsorption portion are made in one piece, or are made in separate pieces and combined and connected together.

3. The battery spacer device according to claim 1, characterized in that: The support portion comprises a first side plate, the first side plate is made of an insulating material, and the first side plate is used to fit the outer shell (301) of the battery cell; The adsorption portion comprises a second side plate, the second side plate is fixedly connected to the first side plate, the second side plate has a porous structure and can adsorb electrolyte, and the second side plate is used to fit the pole core (302) of the battery cell.

4. The battery spacer device according to claim 1, characterized in that: The battery spacer device is used to lead out the pole ear (303) of the pole core (302), and also includes: An extraction hole (103) penetrates the support portion and the adsorption portion along the thickness direction of the battery spacer device, and the extraction hole (103) can pass through the pole ear (303).

5. The battery spacer device according to claim 4, characterized in that: Also includes: A protruding portion (104) is arranged on the supporting portion and surrounds the lead-out hole (103) to protrude from the supporting portion.

6. The battery spacer device according to claim 5, characterized in that: The thickness H1 of the support portion is ≥ 0.3 mm; And / or, the thickness H2 of the adsorption portion is ≥ 1 mm; And / or, the height H3 of the protrusion (104) is ≥ 0.3 mm.

7. The battery spacer device according to claim 3, characterized in that: The material of the first side plate (101) is PP; And / or, the second side plate (102) is made of aerogel or a fiber porous material.

8. The battery spacer device according to claim 1, characterized in that: The battery spacer device is used to separate the pole core (302) and the shell (301), and also includes: A plurality of through holes (203) are provided, wherein the through holes (203) penetrate the support portion and the adsorption portion along the thickness direction of the battery spacer device, and the plurality of through holes (203) are used for circulating electrolyte.

9. A battery cell, characterized in that: The invention comprises a battery spacer device according to any one of claims 1 to 8.

10. The battery cell according to claim 9, characterized in that: Also includes: A pole core (302), wherein the battery spacer device is arranged at an end of the pole core (302); A pole ear (303), wherein the pole ear (303) is arranged at the end of the pole core (302) and passes through the lead-out hole (103) of the battery spacer device.

11. The battery cell according to claim 9, characterized in that: Also includes: Housing (301); The pole core (302) is arranged in the shell (301), and the battery spacer device is arranged on the side of the pole core (302) and is located between the pole core (302) and the shell (301).

12. A battery pack, characterized in that: Comprising a battery cell according to any one of claims 9 to 11.

13. An electrical equipment, characterized in that: include: The battery spacer device according to any one of claims 1 to 8; or A battery cell according to any one of claims 9 to 11; or The battery pack according to claim 12.

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