Batteries and electrical devices

Abstract

The embodiment of the present application provides a battery and an electrical device. The battery includes: a housing; a battery cell group, which is arranged in the housing, and the battery cell group includes at least two battery cells arranged in sequence along a first direction; and an isolator, which is made of an insulating material, and the isolator is arranged in the housing, and is located at the end of the battery cell group in the first direction, and the interior of the isolator has a cavity. The isolator can separate the battery cell group from other components in the housing. The interior of the isolator has a cavity, which can be filled with air. The thermal conductivity of air is low, which can effectively reduce the thermal conductivity of the entire isolator, and the cavity can reduce the direct contact between solid materials and reduce the heat conduction path, thereby preventing a chain reaction of thermal runaway. Furthermore, the cavity, as a physical barrier, can effectively prevent direct contact between battery cells and other conductive components, reduce the risk of short circuit, reduce the possibility of leakage and spark generation, and improve the safety of the entire battery system.

Description

Technical Field

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

[0002] In some related technologies, the battery includes a box and a battery cell, and the battery cell is arranged in the box. In order to isolate the battery cell from other components in the box, an end plate needs to be arranged at the end of the battery cell, but the end plate has a poor heat insulation effect, which affects the safety of the battery. Utility Model Content

[0003] Some embodiments of the present application provide a battery and an electrical device for alleviating the problem of poor internal thermal insulation of the battery.

[0004] Some embodiments of the present application provide a battery, comprising: a box body; a battery cell group disposed in the box body, the battery cell group comprising at least two battery cells arranged in sequence along a first direction; and an isolating member made of an insulating material, the isolating member being disposed in the box body and located at an end of the battery cell group in the first direction, the isolating member having a cavity inside.

[0005] In the above embodiment, the isolating member is disposed in the box body and is located at the end of the battery cell group in the first direction. The isolating member can isolate the battery cell group from other components in the box body, such as a battery management system, etc. The interior of the isolating member has a cavity, which can be filled with air. Air is an excellent thermal insulating material with low thermal conductivity, which can effectively reduce the thermal conductivity of the entire isolating member. The cavity can reduce direct contact between solid materials and reduce the heat conduction path, thereby preventing a chain reaction of thermal runaway. Furthermore, the cavity, as a physical barrier, can effectively prevent direct contact between battery cells and other conductive components, reduce the risk of short circuits, reduce the possibility of leakage and sparks, and improve the safety of the entire battery system.

[0006] In some embodiments, the isolation member includes two isolation plates and at least two connecting members, the two isolation plates are arranged at an interval, and the at least two connecting members are arranged between the two isolation plates and connect the two isolation plates.

[0007] In the above embodiment, at least two connecting members are arranged between the two isolation plates and connect the two isolation plates. The two isolation plates and the at least two connecting members cooperate to form a cavity, thereby reducing the thermal conductivity of the entire isolation member, improving the thermal insulation effect, and reducing the possibility of short circuit, leakage and spark generation, thereby improving the safety of the entire battery system; furthermore, the provision of at least two connecting members can support the two isolation plates, improve the structural strength of the entire isolation member, and improve the ability of the isolation member to resist the expansion force of the battery.

[0008] In some embodiments, a channel is formed between two adjacent connecting members of the at least two connecting members.

[0009] In the above embodiment, a channel is formed between two adjacent connectors, and the channel forms a cavity between the two isolation plates, which reduces the thermal conductivity of the entire isolation member, improves the thermal insulation effect, and can reduce the possibility of short circuit, leakage and spark generation, thereby improving the safety of the entire battery system; furthermore, the provision of at least two connectors can improve the structural strength of the entire isolation member.

[0010] In some embodiments, at least two mutually parallel channels are formed between the at least two connecting members.

[0011] In the above embodiment, the interior of the isolating member has a plurality of mutually parallel channels, that is, a plurality of mutually parallel strip-shaped cavities, which can dissipate heat evenly, further reduce the thermal conductivity, and reduce the heat conduction path; improve the structural strength, reduce the impact of external shock and vibration; prevent short circuit, and enhance electrical insulation performance.

[0012] In some embodiments, at least one of the two isolation plates has a porous structure or a honeycomb structure inside.

[0013] In the above embodiments, the isolation plate adopts a porous structure or a honeycomb structure, which can reduce the thermal conductivity, increase thermal resistance through air insulation, and improve the thermal insulation effect; reduce the weight of the entire isolation component, and improve the compression resistance of the isolation component to resist the expansion force generated during the charging and discharging of the battery cell.

[0014] In some embodiments, at least one of the two isolation plates has at least two layers of porous structure or honeycomb structure inside.

[0015] In the above embodiments, the isolation plate adopts a porous structure or a honeycomb structure, which can reduce the thermal conductivity, increase the thermal resistance through air insulation, improve the thermal insulation effect, and reduce the weight of the entire isolation component.

[0016] In some embodiments, at least one of the two isolation panels is made of foam material.

[0017] In the above embodiment, the isolation plate is made of foam material, so that the isolation plate has a lower thermal conductivity, which delays the temperature rise of the isolation plate and prevents the propagation of thermal runaway; and the resistivity is improved, which can prevent leakage and enhance the electrical insulation performance; furthermore, it also has the functions of buffering and vibration reduction, reducing weight, and improving compression resistance, and can better resist the expansion force generated during the charging and discharging process of the battery cell.

[0018] In some embodiments, the two isolation plates and the at least two connecting members are integrally formed.

[0019] In the above embodiment, the two isolation plates and at least two connecting members are integrally formed, which can improve the structural strength of the entire isolation member and reduce the difficulty of processing.

[0020] In some embodiments, at least two battery cell groups are included, the at least two battery cell groups are arranged in sequence along a second direction, the isolation member is located at ends of the at least two battery cell groups in the first direction, and the second direction intersects the first direction.

[0021] In the above embodiment, a plurality of battery cell groups are isolated from external components by the same isolation member, which can simplify the structure inside the box and improve installation efficiency.

[0022] Some embodiments of the present application provide an electrical device, which includes the battery in any of the above embodiments.

[0023] The electrical device provided in the embodiment of the present application includes the battery provided in the embodiment of the present application, and correspondingly has the beneficial effects of the battery.

[0024] Based on the above technical solution, this application has at least the following beneficial effects:

[0025] In some embodiments, the isolator is disposed in the box and is located at the end of the battery cell group in the first direction. The isolator can isolate the battery cell group from other components in the box, such as a battery management system. The interior of the isolator has a cavity, which can be filled with air. Air is an excellent thermal insulation material with low thermal conductivity, which can effectively reduce the thermal conductivity of the entire isolator. The cavity can reduce direct contact between solid materials and reduce the heat conduction path, thereby preventing a chain reaction of thermal runaway. Furthermore, the cavity, as a physical barrier, can effectively prevent direct contact between battery cells and other conductive components, reduce the risk of short circuits, reduce the possibility of leakage and sparks, and improve the safety of the entire battery system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0027] Figure 1 is a schematic structural diagram of a vehicle disclosed in some embodiments of the present application;

[0028] Figure 2 is a schematic diagram of an exploded structure of a battery disclosed in some embodiments of the present application;

[0029] Figure 3is a schematic top view of a structure inside a box disclosed in some embodiments of the present application;

[0030] Figure 4 is a schematic structural diagram of an isolation member disclosed in some embodiments of the present application;

[0031] Figure 5 is a schematic diagram of an isolation member disclosed in some embodiments of the present application after an isolation plate is removed;

[0032] Figure 6 is a cross-sectional schematic diagram of an isolation plate disclosed in some embodiments of the present application;

[0033] Figure 7 It is a cross-sectional schematic diagram of another isolation plate disclosed in some embodiments of the present application.

[0034] In the drawings, the drawings are not drawn to scale.

[0035] Marking instructions: 1-box; 11-first box; 12-second box; 2-battery cell group; 21-battery cell; 3-isolation member; 31-isolation plate; 311-porous structure; 32-connector; 33-channel; 100-battery; 200-vehicle; 201-axle; 202-wheel; 203-motor; 204-controller. DETAILED DESCRIPTION

[0036] The following detailed description and drawings of the embodiments of the present application are used to illustrate the principles of the present application, but cannot be used to limit the scope of the present application, that is, the present application is not limited to the described embodiments.

[0037] In the description of the present application, it should be noted that, unless otherwise specified, "multiple" means more than two; the terms "upper", "lower", "left", "right", "inside", "outside", etc., indicating the orientation or positional relationship, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but is within the allowable error range. "Parallel" is not strictly parallel, but is within the allowable error range.

[0038] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structure of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0039] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric motorcycles and electric cars, as well as aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0040] The battery disclosed in the embodiments of the present application can be used as a power source for electrical devices or as an energy storage element for various energy storage systems.

[0041] The electrical devices may be mobile phones, portable devices, laptop computers, battery vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc. Among them, spacecraft may include airplanes, rockets, space shuttles and spacecrafts, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, etc., such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc.

[0042] For the convenience of description, the following embodiments are described by taking a vehicle 200 as an example of an electrical device provided in some embodiments of the present application.

[0043] refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 200 provided for some embodiments of the present application. The vehicle 200 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 200, and the battery 100 may be provided at the bottom, head or tail of the vehicle 200. The battery 100 may be used to power the vehicle 200, for example, the battery 100 may be used as an operating power source for the vehicle 200. The vehicle 200 may also include an axle 201, a wheel 202 connected to the axle 201, and a motor 203 and a controller 204, wherein the motor 203 is used to drive the axle 201 to rotate, the controller 204 is used to control the operation of the motor 203, and the battery 100 may be used to provide electrical energy for the operation of the motor 203 and other components in the vehicle.

[0044] In some embodiments of the present application, the battery 100 can not only serve as an operating power source for the vehicle 200 , but also serve as a driving power source for the vehicle 200 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 200 .

[0045] refer to Figure 2 , Figure 2 Schematic diagram of the exploded structure of the battery 100 provided in some embodiments of the present application. The battery 100 includes a box body 1 and a battery cell 21, and the battery cell 21 is accommodated in the box body 1. The box body 1 includes a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define a storage space for accommodating the battery cell 21. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define a storage space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 1 formed by the first box body 11 and the second box body 12 can be in a variety of shapes, such as: cylinder or cuboid.

[0046] There may be multiple battery cells 21, and the multiple battery cells 21 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 21 are both connected in series and in parallel. The multiple battery cells 21 may be connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 21 is accommodated in the box 1. Of course, the battery 100 may also be a battery module formed by connecting multiple battery cells 21 in series, in parallel, or in a mixed connection, and then the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 1. The battery 100 may also include other components, for example, the battery 100 may also include a busbar assembly for realizing electrical connection between the multiple battery cells 21.

[0047] The battery cell 21 can be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 21 can be cylindrical, flat, rectangular or in other shapes.

[0048] refer to Figure 2 and Figure 3 The box 1 of the battery 100 includes a first box 11 and a second box 12. The space formed by the first box 11 and the second box 12 covering each other contains a plurality of battery cells 21, wherein a portion of the plurality of battery cells 21 is sequentially arranged along a first direction X to form a battery cell group 2. At least two battery cell groups 2 may be arranged in the box 1.

[0049] In order to isolate the battery cell 21 from other components in the box 1, for example: to isolate the battery cell 21 from the battery management system, etc., in some related technologies, an end plate is set between the battery cell 21 and other components. However, the end plate has a poor thermal insulation effect, which leads to fast heat conduction between the battery cell 21 and other components inside the battery, affecting the performance of other components and causing safety problems for the battery.

[0050] Based on this, some embodiments of the present application provide a battery and an electrical device for alleviating the problem of poor internal thermal insulation of the battery.

[0051] refer to Figure 3 and Figure 4 In some embodiments, the battery 100 includes a housing 1 , a battery cell group 2 , and an isolation member 3 .

[0052] The battery cell group 2 is disposed in the box body 1 , and the battery cell group 2 includes at least two battery cells 21 sequentially disposed along the first direction X.

[0053] The isolating member 3 is made of insulating material. The isolating member 3 is disposed in the box body 1 and is located at the end of the battery cell group 2 in the first direction X. The isolating member 3 has a cavity inside.

[0054] In some embodiments, at least two battery cells 21 are sequentially arranged along the first direction X. The at least two battery cells 21 sequentially arranged along the first direction X are regarded as a battery cell group 2 , and two or more battery cell groups 2 may be sequentially arranged in the second direction Y.

[0055] In some embodiments, the direction from the first box 11 to the second box 12 of the box 1 is the third direction Z. The first direction X intersects with the second direction Y, the first direction X intersects with the third direction Z, and the second direction Y intersects with the third direction Z. Optionally, the first direction X is perpendicular to the second direction Y, the first direction X is perpendicular to the third direction Z, and the second direction Y is perpendicular to the third direction Z.

[0056] In the above embodiment, the isolator 3 is arranged in the box body 1 and is located at the end of the battery cell group 2 in the first direction X. The isolator 3 can isolate the battery cell group 2 from other components in the box body 1, such as the battery management system. The interior of the isolator 3 has a cavity, which can be filled with air. Air is an excellent thermal insulation material with low thermal conductivity, which can effectively reduce the thermal conductivity of the entire isolator. The cavity can reduce direct contact between solid materials and reduce the heat conduction path, thereby preventing a chain reaction of thermal runaway. Furthermore, the cavity, as a physical barrier, can effectively prevent direct contact between battery cells and other conductive components, reduce the risk of short circuits, reduce the possibility of leakage and sparks, and improve the safety of the entire battery system.

[0057] refer to Figure 4 and Figure 5 In some embodiments, the isolation member 3 includes two isolation plates 31 and at least two connecting members 32 . The two isolation plates 31 are arranged at intervals, and the at least two connecting members 32 are arranged between the two isolation plates 31 and connect the two isolation plates 31 .

[0058] In the above embodiment, at least two connectors 32 are disposed between the two isolation plates 31 and connect the two isolation plates 31. The two isolation plates 31 cooperate with the at least two connectors 32 to form a cavity, thereby reducing the thermal conductivity of the entire isolation member 3, improving the thermal insulation effect, and reducing the possibility of short circuit, leakage and spark generation, thereby improving the safety of the entire battery system. Furthermore, the provision of at least two connectors 32 can support the two isolation plates 31, improve the structural strength of the entire isolation member 3, and improve the ability of the isolation member 3 to resist the expansion force of the battery.

[0059] refer to Figure 5 In some embodiments, a channel 33 is formed between two adjacent connecting members 32 of at least two connecting members 32 .

[0060] In the above embodiment, a channel 33 is formed between two adjacent connectors 32, and the channel 33 forms a cavity between the two isolation plates 31, which reduces the thermal conductivity of the entire isolation member 3, improves the thermal insulation effect, and can reduce the possibility of short circuit, leakage and spark generation, thereby improving the safety of the entire battery system; furthermore, the provision of at least two connectors 32 can improve the structural strength of the entire isolation member 3.

[0061] In some embodiments, the channel 33 is a strip-shaped channel. Of course, a space of other structures can be formed between two adjacent connecting members 32, so that the cavity in the isolation member 3 has different shapes and correspondingly has different structural properties.

[0062] In some embodiments, at least two parallel channels 33 are formed between at least two connecting members 32 .

[0063] In the above embodiment, the interior of the isolation member 3 has a plurality of mutually parallel channels 33, that is, a plurality of mutually parallel strip-shaped cavities, which can dissipate heat evenly, further reduce the thermal conductivity, reduce the heat conduction path; improve the structural strength, reduce the impact of external shock and vibration; prevent short circuit, and enhance electrical insulation performance.

[0064] refer to Figure 6 In some embodiments, at least one of the two isolation plates 31 has a porous structure 311 or a honeycomb structure inside.

[0065] In the above embodiment, the isolation plate 31 adopts a porous structure 311 or a honeycomb structure, which can reduce the thermal conductivity, increase thermal resistance through air insulation, and improve the thermal insulation effect; reduce the weight of the entire isolation component 3, and can improve the compression resistance of the isolation component 3 to resist the expansion force generated during the charging and discharging of the battery cell 21.

[0066] refer to Figure 7 In some embodiments, at least one of the two isolation plates 31 has at least two layers of porous structure 311 or honeycomb structure inside.

[0067] In the above embodiment, the isolation plate 31 adopts a porous structure or a honeycomb structure, which can reduce the thermal conductivity, increase the thermal resistance through air insulation, and improve the thermal insulation effect; thereby reducing the weight of the entire isolation member 3.

[0068] In some embodiments, at least one of the two isolation panels 31 is made of foam material.

[0069] In the above embodiment, the isolation plate 31 is made of foam material, so that the isolation plate 31 has a lower thermal conductivity, which delays the temperature rise of the isolation plate 31 and prevents the spread of thermal runaway; and the resistivity is improved, which can prevent leakage and enhance the electrical insulation performance; furthermore, it also has the functions of buffering and vibration reduction, reducing weight, and improving compression resistance, and can better resist the expansion force generated during the charging and discharging process of the battery cell 21.

[0070] In the above embodiment, the isolation plate 31 adopts different foaming ratios, and correspondingly has different thermal conductivity and compressive resistance. The foaming ratio of the isolation plate 31 can be set according to specific needs.

[0071] In some embodiments, the two isolation plates 31 and the at least two connecting members 32 are integrally formed.

[0072] In the above embodiment, the two isolation plates 31 and the at least two connecting members 32 are integrally formed, which can improve the structural strength of the entire isolation member 3 and reduce the difficulty of processing.

[0073] refer to Figure 3In some embodiments, the battery 100 includes at least two battery cell groups 2 , the at least two battery cell groups 2 are arranged in sequence along the second direction Y, and the isolation member 3 is located at the ends of the at least two battery cell groups 2 in the first direction X.

[0074] In the above embodiment, the plurality of battery cell groups 2 are isolated from external components by the same isolation member 3, which can simplify the structure inside the box 1 and improve the installation efficiency.

[0075] refer to Figures 3 to 7 In some specific embodiments, the battery 100 includes a housing 1 , a battery cell group 2 , and an isolation member 3 .

[0076] The battery cell group 2 is arranged in the box body 1, and the battery cell group 2 includes at least two battery cells 21 arranged in sequence along the first direction X. The isolating member 3 is made of an insulating material, and the isolating member 3 is arranged in the box body 1, and is located at the end of the battery cell group 2 in the first direction X. The isolating member 3 includes two isolating plates 31 and at least two connecting members 32, and the two isolating plates 31 are arranged at intervals, and at least two connecting members 32 are arranged between the two isolating plates 31 and connect the two isolating plates 31. At least two parallel channels 33 are formed between the at least two connecting members 32. Among the two isolating plates 31, at least one isolating plate 31 has a porous structure 311 or a honeycomb structure inside. Moreover, among the two isolating plates 31, at least one isolating plate 31 may have at least two layers of porous structure 311 or honeycomb structure inside. Optionally, the isolating plate 31 is made of a foaming material.

[0077] In the above embodiment, the spacer 3 is mainly used to isolate the battery cell group 2 from other components at the end of the battery cell group 2 .

[0078] In order to prevent heat conversion and electrical conversion between the battery cell group 2 and external components, the separator 3 is generally required to have very excellent low thermal conductivity and insulation performance. At the same time, in order to resist the charge and discharge expansion force of the battery cell, the separator 3 is required to have excellent anti-compression performance.

[0079] Based on this, using the isolation member 3 provided in some embodiments of the present application, the cavity between the two isolation plates 31 can be set to different shapes as needed, and correspondingly have different structural properties, so as to enhance the mechanical properties of the isolation member 3. Furthermore, the isolation plate 31 can be made of foamed material, and the isolation plate 31 can have different foaming ratios and different thermal conductivity coefficients. The foaming ratio of the isolation plate 31 can be selected as needed. In some experimental verifications, the isolation plate 31 using foamed material can reduce its thermal conductivity from 0.06 W / (mK) to 0.04 W / (mK) relative to the solid structure.

[0080] The isolating member 3 provided in the embodiment of the present application can form effective insulation protection at the end of the battery cell group 2 and have a good heat insulation effect, and can improve the pressure resistance of the battery during charging and discharging.

[0081] Some embodiments of the present application further provide an electrical device, which includes the battery in any of the above embodiments.

[0082] The electrical device provided in the embodiment of the present application includes the battery provided in the embodiment of the present application, and correspondingly has the beneficial effects of the battery.

[0083] Based on the above-mentioned embodiments of the present application, in the absence of explicit negation or conflict, the technical features of one embodiment may be beneficially combined with one or more other embodiments.

[0084] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery, characterized in that: include: Box (1); A battery cell group (2) is arranged in the box (1), the battery cell group (2) comprising at least two battery cells (21) arranged in sequence along a first direction (X); and The isolating member (3) is made of insulating material, and is arranged in the box body (1) and located at the end of the battery cell group (2) in the first direction (X). The isolating member (3) has a cavity inside.

2. The battery according to claim 1, characterized in that The isolation member (3) comprises two isolation plates (31) and at least two connecting members (32), the two isolation plates (31) being arranged at intervals, and the at least two connecting members (32) being arranged between the two isolation plates (31) and connecting the two isolation plates (31).

3. The battery according to claim 2, characterized in that A channel (33) is formed between two adjacent connecting members (32) of the at least two connecting members (32).

4. The battery according to claim 2, characterized in that At least two mutually parallel channels (33) are formed between the at least two connecting members (32).

5. The battery according to claim 2, characterized in that At least one of the two isolation plates (31) has a porous structure (311) or a honeycomb structure inside.

6. The battery according to claim 2, characterized in that At least one of the two isolation plates (31) has at least two layers of porous structure (311) or honeycomb structure inside.

7. The battery according to claim 2, characterized in that At least one of the two isolation plates (31) is made of foam material.

8. The battery according to claim 2, characterized in that The two isolation plates (31) and the at least two connecting pieces (32) are integrally formed.

9. The battery according to claim 1, characterized in that The battery comprises at least two battery cell groups (2), the at least two battery cell groups (2) are arranged in sequence along a second direction (Y), the isolation member (3) is located at the ends of the at least two battery cell groups (2) in the first direction (X), and the second direction (Y) intersects with the first direction (X).

10. An electrical device, characterized in that: Comprising a battery according to any one of claims 1 to 9.

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