CN219717126U

CN219717126U - Battery box, battery and electric equipment

Info

Publication number: CN219717126U
Application number: CN202321474408.3U
Authority: CN
Inventors: 张罗
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-06-12
Filing date: 2023-06-12
Publication date: 2023-09-19
Anticipated expiration: 2033-06-12

Abstract

The application relates to the technical field of batteries, and particularly discloses a battery box, a battery and electric equipment. According to the battery box body, the heat-resisting piece is arranged between the isolating piece and the inner wall of the box body, so that the isolating piece is spaced from the inner wall of the box body, heat of the isolating piece is isolated by the heat-resisting piece, heat transfer from the isolating piece to the box body is reduced, the situation that the box body is melted through due to heating is reduced, and therefore the safety of a battery is improved.

Description

Battery box, battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery box, a battery and electric equipment.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

With the development of new energy, more and more fields adopt new energy as power. The battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like.

In the prior art, the isolating piece is fixedly arranged on the inner wall of the battery box body of the battery, the pressure release mechanism of the battery assembly positioned in the battery box body is correspondingly arranged with the isolating piece, and when the battery assembly is in thermal runaway, the isolating piece is utilized to block substances in the thermal runaway of the battery assembly so as to improve the safety of the battery. However, the separator has a poor heat insulation effect, and the safety of the battery is lowered.

Disclosure of Invention

In view of the above, the present utility model provides a battery that solves the problem of poor heat insulation effect of a separator.

A first aspect of the present utility model proposes a battery box comprising:

the box body is provided with an accommodating space which is used for accommodating the tank assembly;

the isolating piece is arranged in the accommodating space and is used for isolating the inner wall of the box body and the pressure release mechanism of the battery assembly;

and the heat-resistant piece is arranged between the isolating piece and the inner wall of the box body.

According to the battery box body, the heat-resisting piece is arranged between the isolating piece and the inner wall of the box body, so that the isolating piece is spaced from the inner wall of the box body, heat of the isolating piece is isolated by the heat-resisting piece, heat transfer from the isolating piece to the box body is reduced, the situation that the box body is melted through due to heating is reduced, and therefore the safety of a battery is improved.

In some embodiments of the application, the heat-resistant member is a first plate-like member or a hollowed-out member. When the heat blocking member is provided as the plate-like member, the distance between the separator and the inner wall of the case body is made the same, and the heat transfer from the separator to the case body is further reduced, so that the safety of the battery is further improved. In addition, when setting up the heat blocking piece into the fretwork piece, the fretwork piece is when spacing the inner wall of isolator and case body, can effectively reduce the weight of heat blocking piece to the whole weight of battery box has obtained the reduction.

In some embodiments of the application, the heat-resistant member is a resin member, a metal member, or a ceramic member. Through with hinder the heat spare and be one of resin spare, metalwork and ceramic part to can set up the heat spare according to different user demands, and then make the battery box body can satisfy the installation demand of different batteries.

In some embodiments of the present application, the heat-blocking member is connected to the inner wall of the case body by bonding, welding, injection-molding, screw-bonding, riveting, or clamping. The heat-resistant piece is connected with the inner wall of the box body, so that the heat-resistant piece can be better shielded between the isolating piece and the inner wall of the box body, heat transfer from the isolating piece to the box body is further reduced, and the safety of the battery is further improved. In addition, the connection mode between the inner wall of the box body and the isolating piece is set to be one of bonding, welding, injection molding connection, screw connection, riveting and clamping, so that the heat-resistant piece can be installed and fixed according to different installation modes, and the convenience of assembling the heat-resistant piece is improved.

And/or the heat-resistant piece is connected with the isolation piece, and the connection mode between the heat-resistant piece and the isolation piece is bonding, welding, injection molding connection, screw connection, riveting or clamping connection. The heat-resistant piece is connected with the isolating piece, so that dislocation between the isolating piece and the heat-resistant piece can be reduced, the heat blocking effect of the heat-resistant piece is further improved, heat transfer from the isolating piece to the box body is further reduced, and the safety of the battery is further improved. In addition, the connection mode between the heat-resistant piece and the isolation piece is one of bonding, welding, injection molding connection, screw connection, riveting and clamping, so that the isolation piece can be installed and fixed according to different installation modes, and convenience in assembly of the isolation piece is improved.

In some embodiments of the present application, the tank body includes a first portion and a second portion, the first portion and the second portion are fastened and connected, the spacer is a second plate-shaped member, the second plate-shaped member is connected to the first portion or the second portion, and the second plate-shaped member is disposed opposite to the pressure release mechanism. The first portion and the second portion which are fastened to each other are provided to the case body, so that the assembly of the battery assembly can be facilitated in the accommodation space of the case body, and the convenience of the assembly can be improved. In addition, the pressure release mechanism of the battery assembly is arranged facing the first part or the second part, and the isolating piece is arranged on the part corresponding to the pressure release mechanism, so that the pressure release mechanism of the battery assembly is shielded, the condition that high-temperature substances generated in the thermal runaway process of the battery assembly are directly melted through the box body is reduced, and the safety of the battery is improved.

In some embodiments of the application, the second plate is attached to the first portion, the first portion having a projection area for facing the pressure relief mechanism, the second plate having a first projection on the projection area, the ratio of the area of the first projection to the area of the projection area ranging from 0.75 to 1. Specifically, the first portion of case body sets up towards battery pack's relief mechanism, through setting up the first projection of separator and the regional area ratio of projection for the separator has sufficient shielding region to first portion, can further reduce battery pack's relief mechanism and strike case body when thermal runaway, makes the security of battery obtain further improvement.

In some embodiments of the application, the thermal barrier has a second projection on the projection area, the ratio of the area of the second projection to the area of the projection area ranging from 0.75 to 1. Specifically, the first part of case body sets up towards battery pack's relief mechanism, through setting up the area ratio to the second projection and the projection region of heat blocking piece for heat blocking piece has sufficient shielding region to between first part and the separator, can further reduce the condition that the separator is to case body heat transfer, has reduced the case body by the condition that the high temperature was fused and is worn, makes the security of battery obtain further improvement.

In some embodiments of the application, the ratio of the area of the first projection to the area of the projection area ranges from 0.85 to 1. Through further setting up the first projection of separator and the area ratio of projection region, further increased the shielding region of separator to first part, can further reduce battery pack's relief mechanism impact case body when thermal runaway for the security of battery has obtained further improvement.

And/or the ratio of the area of the second projection to the area of the projection area is in the range of 0.85-1. Through further setting up the area ratio of the second projection to the projection region of heat-resisting spare, further increased the shielding region between heat-resisting spare to first part and the separator, can further reduce the condition that the separator is to case body heat transfer, further reduced the case body by the condition that the high temperature was fused and is worn for the security of battery has obtained further improvement.

In some embodiments of the present application, a retaining structure is provided on a surface of the first portion facing the accommodating space, and the retaining structure is disposed along a circumferential direction of the projection area and is in a snap fit with at least part of an edge of the second plate-like member. The clamping structure is arranged on the first part and is matched with the isolating piece which is the second plate-shaped piece, so that the stability of the isolating piece can be improved, the situation that the isolating piece is displaced to weaken the shielding effect on the pressure release mechanism is reduced, and the safety of the battery is further improved.

In some embodiments of the application, the second plate has a dimension in the range of 1.5mm to 5mm in the direction of the snap-fit of the first and second portions. Specifically, the pressure release mechanism of the battery assembly located in the case body faces the first portion or the second portion, and when thermal runaway occurs, the pressure release mechanism releases pressure in the buckling direction of the first portion and the second portion, and by setting the dimensions of the separator, which is the second plate-shaped member, in the buckling direction of the first portion and the second portion, the separator has a sufficient dimension to block the high-temperature substance released by the pressure release mechanism, thereby reducing the situation that the high-temperature substance is melted through the case body, and further improving the safety of the battery.

In some embodiments of the application, the thermal barrier has a dimension in the range of 1.5mm to 10mm in the direction of the snap fit of the first and second portions. The heat blocking piece is arranged between the isolation piece and the box body, when thermal runaway occurs, the pressure release mechanism releases pressure in the buckling direction of the first part and the second part, and the heat blocking piece can block the heat of the isolation piece by setting the size of the heat blocking piece in the buckling direction of the first part and the second part in a sufficient size, so that the condition of transferring the temperature to the box body is reduced, the box body is reduced due to the fact that the problem is high, and the safety of the battery is further improved.

In some embodiments of the application, the second plate has a dimension in the range of 2mm to 3mm in the direction of the snap-fit of the first and second portions. Through further setting up the size of the spacer that is the second platy piece in the lock direction of first part and second part, further improved the spacer and blockked the effect to the high temperature material that release of release mechanism, further reduced the condition that high temperature material fused through the case body for the security of battery has obtained further improvement.

And/or, in the buckling direction of the first part and the second part, the size range of the heat-resistant piece is 2mm-5mm. Through the setting of further to the heat-resisting spare at the epaxial size of lock of first part and second part, further make the heat-resisting spare have enough sizes can block the heat of separator to reduce the condition of temperature to case body transmission, make the case body melt through the condition because of the problem height obtain reducing, make the security of battery obtain further improvement.

In some embodiments of the application, the separator is a mica member or an inorganic fiber member. Through setting up the separator for the separator has good blocking effect to pressure release mechanism, makes the battery in thermal runaway's in-process case body by the condition of melting through effectively reduced.

A second aspect of the present application proposes a battery comprising:

according to the battery case as described above.

A third aspect of the application proposes a powered device comprising a battery according to the above.

The foregoing description is only an overview of the present application, and is intended to be implemented in accordance with the teachings of the present application in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present application more readily apparent.

Drawings

Fig. 1 schematically shows a schematic structural diagram of an electrical consumer according to an embodiment of the application;

fig. 2 is an exploded structural view of the battery shown in fig. 1;

FIG. 3 is a schematic view of a portion of the battery case shown in FIG. 2;

FIG. 4 is a schematic diagram of another view of the structure shown in FIG. 3;

FIG. 5 is a cross-sectional view of section A-A of the structure shown in FIG. 4;

FIG. 6 is an enlarged schematic view of the M portion of the structure shown in FIG. 5;

FIG. 7 is an exploded view of the structure shown in FIG. 4;

FIG. 8 is a schematic view of the first portion shown in FIG. 7;

FIG. 9 is a cross-sectional view of the portion B-B of the first portion shown in FIG. 8;

FIG. 10 is a schematic view of the first portion of FIG. 8 from another perspective;

FIG. 11 is a schematic view of the heat shield shown in FIG. 7;

fig. 12 is a schematic structural view of another embodiment of the heat blocking member.

The reference numerals are as follows:

1000. a vehicle;

100. a battery; 200. A controller; 300. a motor;

110. a battery case;

10. a case body;

11. a first portion; 111. a clamping structure; 112. a projection area; 12. a second portion;

20. an accommodation space;

30. a spacer;

40. a heat blocking member;

120. a battery assembly;

121. a battery cell;

1211. and a pressure release mechanism.

a is the buckling direction when the first part is installed on the second part.

Detailed Description

Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles and the like, and various fields such as aerospace and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

In the prior art, the isolating piece has been set firmly on the inner wall of the case body of battery, is located the relative setting of battery pack's relief mechanism and isolating piece in the case body, when battery pack takes place thermal runaway, blocks battery pack thermal runaway's material with the isolating piece, but, the thermal-insulated effect of isolating piece is poor, and the heat easily transmits to on the case body, and the case body easily appears by the condition of melting to lead to the security of battery to be reduced.

According to the application, the heat-resistant member is arranged between the separator of the battery box body and the inner wall of the box body, so that the separator is spaced from the inner wall of the box body, and the heat of the separator is blocked by the heat-resistant member, so that the heat transfer of the separator to the box body is reduced, the situation that the box body is melted through due to heating is reduced, and the safety of the battery is improved.

The battery according to the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the use of the battery. A power supply system including the battery cell, the battery, and the like according to the present application, which constitute the power utilization device, may be used.

The electric equipment using the battery as the power supply in the embodiment of the application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described batteries and electric devices, but may be applied to all batteries including battery cases and electric devices using the batteries, but for simplicity of description, the following embodiments are described by taking electric vehicles as examples.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Fig. 2 shows a schematic structure of a battery 100 according to an embodiment of the present application. In fig. 2, the battery 100 may include a plurality of battery modules 120 and a battery case 110, the battery case 110 includes a case body 10, the number of the battery modules 120 may be one or more, and in fig. 2, the number of the battery modules 120 is a plurality, and the plurality of battery modules 120 are accommodated in the accommodating space 20 of the case body 10. The case body 10 is used to house the battery assembly 120 to prevent liquid or other foreign matter from affecting the charge or discharge of the battery cells. The case body 10 may have a simple three-dimensional structure such as a rectangular parallelepiped, a cylinder, or a sphere, or may have a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped, a cylinder, or a sphere. The material of the case body 10 may be an alloy material such as an aluminum alloy or an iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

To meet different usage power requirements, the battery assembly 120 may include a plurality of battery cells 121, and the battery cells 121 refer to the smallest units constituting the battery assembly. A plurality of battery cells 121 may be connected in series and/or parallel together via electrode terminals for various applications. The battery cells 121 may include, but are not limited to, lithium ion batteries, sodium ion batteries, magnesium ion batteries, or the like. In addition, the shape of the battery cell 121 includes, but is not limited to, a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc.

As shown in fig. 2 to 12, in some embodiments of the present application, a battery case 110 is specifically provided, the battery case 110 being used for a battery 100, wherein the battery case 110 includes a case body 10, a separator 30, and a heat blocking member 40, an accommodating space 20 is provided in the case body 10, the accommodating space 20 is used for accommodating a battery assembly 120 of a battery 100, and the separator 30 is provided in the accommodating space 20 and is used for isolating an inner wall of the case body 10 and a pressure release mechanism 1211 of the battery assembly 120.

In the present embodiment, as shown in fig. 2, the battery assembly 120 is provided with a pressure release mechanism 1211, and the pressure release mechanism 1211 is used to perform a pressure release operation on the battery assembly 120 when thermal runaway (a situation in which the internal pressure of the battery 100 cells of the battery assembly 120 increases sharply due to a short circuit or the like) occurs in the battery assembly 120, so as to reduce the situation in which the battery assembly 120 explodes.

The spacer 30 is a member disposed between the pressure release mechanism 1211 of the battery assembly 120 and the inner wall of the case body 10, and the spacer 30 can shield the pressure release mechanism 1211, so that when thermal runaway occurs in the battery assembly 120, the spacer 30 is used to shield the substances sprayed out from the pressure release, thereby reducing the melting-through of the case body 10 caused by the impact of the substances in the pressure release process on the case body 10, and improving the overall safety of the battery 100.

In addition, the heat-blocking member 40 is a poor heat conductor, that is, the rate of heat transfer through the heat-blocking member 40 is low, so that the heat-blocking member 40 is disposed between the separator 30 and the inner wall of the case body 10, and the separator 30 is separated from the case body 10 by the heat-blocking member 40, so that when the battery assembly 120 is out of control, heat cannot be transferred to one side of the case body 10 through the separator 30, and the case body 10 is fused due to high heat quantity is reduced.

As shown in fig. 5 and 6, the battery case 110 of the present application has the heat blocking member 40 disposed between the separator 30 and the inner wall of the case body 10 such that the separator 30 is spaced apart from the inner wall of the case body 10 and the heat of the separator 30 is blocked by the heat blocking member 40, thereby reducing the heat transfer from the separator 30 to the case body 10 and the case body 10 being melted by heat, and improving the safety of the battery 100.

It should be understood that, in the present embodiment, the spacer 30 has various connection and fixation forms, wherein the spacer 30 may be connected and fixed only to the inner wall of the case body 10, and the connection position of the spacer 30 and the case body 10 is kept away from the position of the pressure release mechanism 1211 of the battery assembly 120, so as to reduce the heat transfer from the spacer 30 to the case body 10; the separator 30 may be connected only with the heat blocking member 40, in which case the heat blocking member 40 is fixedly connected with the inner wall of the case body 10, and the separator 30 is fixedly connected to the side of the heat blocking member 40 facing away from the case body 10 and is disposed opposite to the pressure release mechanism 1211 of the battery assembly 120; the spacer 30 may be connected to both the heat-blocking member 40 and the case body 10, where the heat-blocking member 40 is fixedly connected to the inner wall of the case body 10, and the spacer 30 is fixedly connected to the side of the heat-blocking member 40 facing away from the case body 10, while the heat-blocking member 40 is fixedly connected to the inner wall of the case body 10 (the fixedly connected position of the heat-blocking member 40 and the case body 10 avoids the pressure release mechanism 1211 of the battery assembly 120).

It should be noted that the heat blocking member 40 may cover part or all of the inner wall of the tank body 10. In the present embodiment, the heat blocking member 40 covers a part of the inner wall of the case body 10, that is, at a position of the inner wall of the case body 10 corresponding to the pressure release mechanism 1211 (the other position is less likely to be penetrated by fusing), by arranging the positions of the heat blocking member 40, the number of use of the heat blocking member 40 can be reduced, and thus the manufacturing cost of the battery case 110 can be reduced, so that the overall manufacturing cost of the battery 100 can be reduced.

In some embodiments of the present application, as shown in fig. 5 to 7 and 10, the heat blocking member 40 is a first plate-like member.

Specifically, the first plate-like member is a flat plate-like structure, and in the direction in which the heat blocking member 40 is aligned with the separator 30, the flat plate-like structure is a closed structure. The pressure release mechanism 1211 of the battery assembly 120 is generally located at the same side inside the case body 10, and at this time, the inner wall of the case body 10 facing the pressure release mechanism 1211 is generally in a planar structure, so that the distance between the separator 30 and the inner wall of the case body 10 is the same when the heat blocking member 40 is provided as a plate-shaped member, further reducing the heat transfer of the separator 30 to the case body 10, and further improving the safety of the battery 100.

In some embodiments of the present application, as shown in fig. 11, the heat-blocking member 40 is a hollow member.

Specifically, the hollow member is a plate-like structure, and in the direction in which the heat-blocking member 40 and the spacer 30 are arranged, the plate-like structure is a hollow structure. When the heat blocking member 40 is provided as the hollowed member, the hollowed member can effectively reduce the weight of the heat blocking member 40 while spacing the separator 30 from the inner wall of the case body 10, thereby reducing the overall weight of the battery case 110 of the battery 100.

It is to be understood that the hollow position is provided with air, the air is a hot bad conductor, and through setting up the hollow position, the heat insulation setting can be carried out between the box body 10 and the isolating piece 30 by utilizing the air of the hollow position, so that the heat transfer between the isolating piece 30 and the box body 10 is effectively reduced.

In some embodiments of the present application, the heat blocking member 40 is a resin member.

Specifically, the manufacturing cost of the resin member is low, and thus the manufacturing cost of the battery case 110 and thus the battery 100 can be effectively reduced, and in addition, the resin member is convenient to process and manufacture, and also the manufacturing cost of the battery case 110 is effectively reduced, so that the manufacturing cost of the battery 100 can be effectively reduced.

Note that in this embodiment, the resin member may be formed of a resin-based composite material, such as silicone or siloxane.

In some embodiments of the present application, the heat blocking member 40 is a metal member.

Specifically, the metal piece is high in strength and good in stability, the spacer 30 can be effectively supported, and deformation of the spacer 30 caused by high temperature is reduced.

Note that in this embodiment, the metal member may be a stainless steel material member, a cast iron material member, a copper material member, or the like.

In some embodiments of the present application, the thermal barrier 40 is a ceramic member.

Specifically, the ceramic member is a poor hot conductor and has good heat insulation performance, and the heat-insulating member 40 is arranged as the ceramic member, so that the heat insulation effect between the separator 30 and the box body 10 can be enhanced, the heat transfer condition of the separator 30 to the box body 10 is further reduced, the penetration condition of the box body 10 is further reduced, and the safety of the battery 100 is further improved.

It should be noted that, in the present embodiment, the ceramic member may be a ceramic matrix composite material, a high performance ceramic foam, a toughened ceramic material, a nano-micro-porous plate based on fumed silica, or the like.

Additionally, in some embodiments of the present application, the thermal barrier 40 may also be a flexible thermal barrier material or a rigid spacing barrier material, or the like.

Based on the above-mentioned that the heat-resistant member 40 is made of different materials, the heat-resistant member 40 can be set according to different use requirements, and the battery case 110 can meet the installation requirements of different batteries 100.

In some embodiments of the present application, the heat blocking member 40 is connected to the inner wall of the tank body 10, and the heat blocking member 40 is connected to the inner wall of the tank body 10 by adhesion.

Specifically, set up the bonding glue between the inner wall of heat-resisting spare 40 and case body 10, be connected heat-resisting spare 40 and case body 10 through the mode of bonding, the mode of bonding is assembled conveniently, can effectively improve the assembly efficiency between heat-resisting spare 40 and the case body 10 to can increase the takt, make the cost of production can be reduced effectively.

In some embodiments of the present application, the heat blocking member 40 is connected to the inner wall of the tank body 10, and the connection between the heat blocking member 40 and the inner wall of the tank body 10 is welding.

Specifically, when the heat-resistant member 40 is assembled with the box body 10, the heat-resistant member 40 is abutted against the inner wall of the box body 10, the heat-resistant member 40 is welded and fixed with the inner wall of the box body 10 by using welding equipment, the connecting strength of the welding and fixing mode is high, the separation condition of the heat-resistant member 40 and the box body 10 can be effectively reduced, and the heat-resistant effect of the heat-resistant member 40 on the isolating member 30 and the box body 10 is further effectively improved.

In some embodiments of the present application, the heat-blocking member 40 is connected to the inner wall of the tank body 10, and the connection between the heat-blocking member 40 and the inner wall of the tank body 10 is injection-molded.

Specifically, when the heat-resistant piece 40 and the box body 10 are assembled, the heat-resistant piece 40 is abutted against the inner wall of the box body 10, the space between the heat-resistant piece 40 and the box body 10 is subjected to injection molding by using injection molding equipment, the heat-resistant piece 40 and the box body 10 are connected and fixed by using an injection molding mode, the heat-resistant piece 40 and the box body 10 form an integrated structure, so that the connection strength between the heat-resistant piece 40 and the box body 10 is improved, the falling-off condition between the heat-resistant piece 40 and the box body 10 is reduced, and the heat-resistant effect of the heat-resistant piece 40 to the box body 10 and the isolating piece 30 is improved.

In some embodiments of the present application, the heat blocking member 40 is connected to the inner wall of the tank body 10 in a screw connection manner between the heat blocking member 40 and the inner wall of the tank body 10.

Specifically, when the heat-resistant member 40 is assembled with the case body 10, the heat-resistant member 40 is abutted against the inner wall of the case body 10, the heat-resistant member 40 is fixedly connected with the case body 10 by using screws, the screw connection mode is convenient to disassemble and assemble, and when the heat-resistant member 40 needs to be replaced, the heat-resistant member 40 can be separated by disassembling the screws, so that the heat-resistant member 40 can be replaced independently, and the maintenance cost of the battery 100 is reduced.

In some embodiments of the present application, the heat blocking member 40 is connected to the inner wall of the tank body 10, and the heat blocking member 40 is connected to the inner wall of the tank body 10 by riveting.

Specifically, when the heat-resistant member 40 is assembled with the case body 10, the heat-resistant member 40 is abutted against the inner wall of the case body 10, the heat-resistant member 40 is fixedly connected with the case body 10 by using rivets, the riveting mode is high in strength and convenient to assemble, and the assembling efficiency can be effectively improved while the falling-off condition of the heat-resistant member 40 relative to the case body 10 is reduced.

In some embodiments of the present application, the heat-resistant member 40 is connected to the inner wall of the case body 10, and the heat-resistant member 40 is connected to the inner wall of the case body 10 by a clamping connection.

Specifically, when the heat-resistant member 40 is assembled with the case body 10, the heat-resistant member 40 is fastened and fixed to the inner wall of the case body 10 by a hook or other structure, so that the cost of fastening and fixing is low, the manufacturing cost of the battery case 110 is reduced, and the overall manufacturing cost of the battery 100 is reduced.

Based on the connection between the heat-blocking member 40 and the inner wall of the case body 10, the heat-blocking member 40 can be better blocked between the separator 30 and the inner wall of the case body 10, heat transfer from the separator 30 to the case body 10 is further reduced, and safety of the battery 100 is further improved. In addition, based on the connection mode between the inner wall of the case body 10 and the spacer 30, the connection mode is one of bonding, welding, injection molding connection, screw connection, riveting and clamping, so that the heat-resistant member 40 can be installed and fixed according to different installation modes, and the convenience of assembling the heat-resistant member 40 is improved.

In some embodiments of the present application, the heat blocking member 40 is connected to the spacer 30, and the heat blocking member 40 is connected to the spacer 30 by bonding.

Specifically, set up the bonding glue between heat blocking member 40 and the spacer 30, be connected heat blocking member 40 and spacer 30 through the mode of bonding, the mode of bonding is assembled conveniently, can effectively improve the assembly efficiency between heat blocking member 40 and spacer 30 to can increase the takt, make the cost of production can be reduced effectively.

In some embodiments of the present application, the heat blocking member 40 is connected to the spacer 30, and the connection between the heat blocking member 40 and the spacer 30 is by welding.

Specifically, when the heat-resistant member 40 and the isolating member 30 are assembled, the heat-resistant member 40 is abutted against the isolating member 30, the heat-resistant member 40 and the isolating member 30 are welded and fixed by using welding equipment, the connecting strength of the welding and fixing mode is high, the separation condition of the heat-resistant member 40 and the isolating member 30 can be effectively reduced, and then the heat-resistant effect of the heat-resistant member 40 on the isolating member 30 and the box body 10 is effectively improved.

In some embodiments of the present application, the heat-blocking member 40 is connected to the spacer 30, and the heat-blocking member 40 is connected to the spacer 30 by injection molding.

Specifically, when the heat-resistant piece 40 and the isolation piece 30 are assembled, the heat-resistant piece 40 is abutted against the isolation piece 30, the space between the heat-resistant piece 40 and the isolation piece 30 is subjected to injection molding by using injection molding equipment, the heat-resistant piece 40 and the isolation piece 30 are connected and fixed by using an injection molding mode, the heat-resistant piece 40 and the isolation piece 30 form an integrated structure, so that the connection strength between the heat-resistant piece 40 and the isolation piece 30 is improved, the falling-off condition between the heat-resistant piece 40 and the isolation piece 30 is reduced, and the heat-resistant effect of the heat-resistant piece 40 on the box body 10 and the isolation piece 30 is improved.

In some embodiments of the present application, the heat blocking member 40 is connected to the spacer 30 by a screw connection between the heat blocking member 40 and the spacer 30.

Specifically, when the heat-resistant member 40 is assembled with the separator 30, the heat-resistant member 40 is abutted against the separator 30, the heat-resistant member 40 is fixedly connected with the separator 30 by using screws, the screw connection mode is convenient for disassembly and assembly, and when the separator 30 needs to be replaced, the separation of the separator 30 can be realized by disassembling the screws, so that the separate replacement of the separator 30 can be realized, and the maintenance cost of the battery 100 is reduced.

In some embodiments of the present application, the heat blocking member 40 is connected to the spacer 30, and the heat blocking member 40 is connected to the spacer 30 by riveting.

Specifically, when the heat-resistant member 40 and the spacer 30 are assembled, the heat-resistant member 40 is abutted against the spacer 30, the heat-resistant member 40 and the spacer 30 are fixedly connected by rivets, the strength of the riveting connection is high, the assembly is convenient, and the assembly efficiency can be effectively improved while the falling-off condition of the spacer 30 relative to the box body 10 is reduced.

In some embodiments of the present application, the heat-blocking member 40 is connected to the spacer 30, and the heat-blocking member 40 is connected to the spacer 30 by a clamping connection.

Specifically, when the heat-resistant member 40 and the spacer 30 are assembled, the heat-resistant member 40 and the spacer 30 are fastened and fixed by the hook and other structures, so that the cost of fastening and fixing is low, the manufacturing cost of the battery box 110 is reduced, and the overall manufacturing cost of the battery 100 is reduced.

Based on the connection of the heat-blocking member 40 and the separator 30, dislocation between the separator 30 and the heat-blocking member 40 can be reduced, the heat blocking effect of the heat-blocking member 40 is further improved, heat transfer from the separator 30 to the case body 10 is further reduced, and the safety of the battery 100 is further improved. In addition, based on the above-mentioned connection mode between the heat-resistant member 40 and the spacer 30 being one of bonding, welding, injection molding connection, screw connection, riveting and clamping, the spacer 30 can be installed and fixed according to different installation modes, and the convenience of the assembly of the spacer 30 is further improved.

In some embodiments of the application, as shown in fig. 2, the tank body 10 includes a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 are snap-connected, as shown in fig. 3, 5 to 7, the spacer 30 is a second plate-like member, the second plate-like member is connected to the first portion 11 or the second portion 12, and the second plate-like member is disposed opposite to the pressure release mechanism 1211.

Specifically, as shown in fig. 2, the case body 10 includes a first portion 11 and a second portion 12, the first portion 11 and the second portion 12 being fastened to each other, the first portion 11 and the second portion 12 together defining a space for accommodating the battery assembly 120. The case body 10 is provided as the first part 11 and the second part 12 fastened to each other, so that the assembly of the battery assembly 120 can be facilitated in the receiving space 20 of the case body 10, so that the convenience of the assembly is improved.

Wherein the first portion 11 and the second portion 12 have various embodiments, such as: the second portion 12 may be a hollow structure having one end opened, the first portion 11 may be a plate-shaped structure, and the first portion 11 covers the opening side of the second portion 12, so that the first portion 11 and the second portion 12 together define a space for accommodating the battery assembly 120; for another example: the first portion 11 and the second portion 12 may also be hollow structures with one side open, and the open side of the first portion 11 is buckled with the open side of the second portion 12 (as shown in fig. 2).

Further, in the present embodiment, as shown in fig. 2, the first portion 11 and the second portion 12 are disposed up and down, and the first portion 11 is located above the second portion 12. Wherein the pressure release mechanism 1211 of the battery assembly 120 may be disposed upward (the pressure release mechanism 1211 faces the first portion 11), and the pressure release mechanism 1211 of the battery assembly 120 may be disposed downward (the pressure release mechanism 1211 faces the second portion 12).

The pressure release mechanism 1211 of the battery assembly 120 is disposed facing the first portion 11 or the second portion 12, and the separator 30 is disposed on a portion corresponding to the pressure release mechanism 1211, so as to shield the pressure release mechanism 1211 of the battery assembly 120, and reduce the situation that high-temperature substances generated during thermal runaway of the battery assembly 120 are directly melted through the case body 10, so that the safety of the battery 100 is improved.

In some embodiments of the application, the second plate is attached to the first portion 11, the first portion 11 having a projection area 112 (as shown in fig. 10) facing the pressure relief mechanism 1211, the second plate having a first projection on the projection area 112, the ratio of the area of the first projection to the area of the projection area 112 ranging from 0.75 to 1.

Specifically, the case body 10 includes a first portion 11 and a second portion 12 that are fastened to each other, wherein a pressure release mechanism 1211 of the battery assembly 120 located in the accommodation space 20 of the case body 10 is disposed facing the first portion 11, and the separator 30 and the heat blocking member 40 are both disposed on an inner wall of the first portion 11 and disposed opposite to the pressure release mechanism 1211. The first portion 11 has a projection area 112 provided opposite to the pressure release mechanism 1211, and the spacer 30, which is a second plate-like member, forms a first projection in the projection area 112 in the engagement direction of the first portion 11 and the second portion 12, the first projection being located in the projection area 112.

It should be understood that when the ratio of the area of the first projection to the area of the projection area 112 is less than 0.75, the shielding area of the partition 30 to the pressure release mechanism 1211 is small, and the pressure release mechanism 1211 is easy to bypass the partition 30 and directly reach the first portion 11 during the pressure release process, so that the first portion 11 is fused; when the ratio of the area of the first projection to the area of the projection area 112 is greater than 1, the size of the spacer 30 is relatively large, which occupies more accommodation space 20 of the case body 10, and reduces the space utilization of the case body 10.

In the present embodiment, by setting the area ratio of the first projection to the projection area 112 of the separator 30 within the interval of 0.75-1 so that the separator 30 has a sufficient shielding area for the first portion 11, the pressure release mechanism 1211 of the battery assembly 120 can be further reduced from striking the case body 10 at the time of thermal runaway, so that the safety of the battery 100 is further improved.

It should be noted that in the present embodiment, the area ratio between the first projection and the projection area 112 may be 0.75, 0.8, 0.84, 0.9, 0.94, 0.99.

In some embodiments of the present application, the thermal barrier 40 has a second projection on the projection area 112, and the ratio of the area of the second projection to the area of the projection area 112 ranges from 0.75 to 1.

Specifically, the case body 10 includes a first portion 11 and a second portion 12 that are fastened to each other, wherein a pressure release mechanism 1211 of the battery assembly 120 located in the accommodation space 20 of the case body 10 is disposed facing the first portion 11, and the separator 30 and the heat blocking member 40 are both disposed on an inner wall of the first portion 11 and disposed opposite to the pressure release mechanism 1211. The first portion 11 has a projection area 112 disposed opposite to the pressure release mechanism 1211, and the heat blocking member 40 forms a second projection in the projection area 112 in the buckling direction of the first portion 11 and the second portion 12, the second projection being located in the projection area 112.

It should be appreciated that when the ratio of the area of the second projection to the area of the projection area 112 is less than 0.75, the shielding area of the heat-shielding member 40 to the spacer 30 is small, and the heat of the spacer 30 is easy to bypass the heat-shielding member 40 to transfer the heat to the first portion 11, so that the first portion 11 is fused; when the ratio of the area of the second projection to the area of the projection area 112 is greater than 1, the heat-blocking member 40 has a relatively large size, and occupies more accommodation space 20 of the case body 10, thereby reducing the space utilization of the case body 10.

In the present embodiment, by setting the area ratio of the second projection to the projection area 112 of the heat blocking member 40 within the interval of 0.75-1, so that the heat blocking member 40 has a sufficient shielding area for the first portion 11, the pressure release mechanism 1211 of the battery assembly 120 can be further reduced from striking the case body 10 at the time of thermal runaway, so that the safety of the battery 100 is further improved.

It should be noted that in the present embodiment, the area ratio between the second projection and the projection area 112 may be 0.75, 0.8, 0.84, 0.9, 0.94, 0.99.

In some embodiments of the application, the ratio of the area of the first projection to the area of the projection area 112 ranges from 0.85 to 1. By further setting the area ratio of the first projection of the separator 30 to the projection area 112, the shielding area of the first portion 11 by the separator 30 is further increased, the pressure release mechanism 1211 of the battery assembly 120 can be further reduced from striking the case body 10 at the time of thermal runaway, so that the safety of the battery 100 is further improved.

It should be noted that in the present embodiment, the area ratio between the first projection and the projection area 112 may be 0.85, 0.86, 0.87, 0.88, 0.89, 0.9, 0.91, 0.92, 0.93, 0.95, 0.96, 0.97, 0.98, 1.

In some embodiments of the application, the ratio of the area of the second projection to the area of the projection area 112 ranges from 0.85 to 1. By further setting the area ratio of the second projection of the heat blocking member 40 to the projection area 112, the shielding area between the first portion 11 and the separator 30 by the heat blocking member 40 is further increased, the heat transfer from the separator 30 to the case body 10 can be further reduced, the case body 10 is further reduced from being melted through at a high temperature, and the safety of the battery 100 is further improved.

In some embodiments of the present application, as shown in fig. 6 and 9, a retaining structure 111 is provided on a surface of the first portion 11 facing the accommodating space 20, and the retaining structure 111 is disposed along a circumferential direction of the projection area 112 and is in snap-fit engagement with an edge of at least a portion of the second plate-like member.

Specifically, the case body 10 includes a first portion 11 and a second portion 12 that are fastened to each other, the pressure release mechanism 1211 of the battery assembly 120 is disposed facing the first portion 11, and the heat blocking member 40 and the separator 30 are both fitted to the inner wall of the first portion 11 and disposed opposite to the pressure release mechanism 1211. The heat blocking member 40 is fixedly connected to the inner wall of the first portion 11, and the edge of the spacer 30 is fixed to the first portion 11 by the holding structure 111.

The holding structure 111 is a structure that can be engaged with an edge of the spacer 30 that is the second plate-like member and can hold the position of the spacer 30, and the holding structure 111 may be a hook, a boss, a groove, or the like. As shown in fig. 2, in the present application, the retaining structure 111 is an annular slot, the edge of the spacer 30 is embedded in the annular slot, and the annular slot is used to limit the edge of the spacer 30, so as to improve the connection and fixing strength between the spacer 30 and the first portion 11.

By providing the holding structure 111 on the first portion 11 and utilizing the holding structure 111 to cooperate with the separator 30 that is a second plate-like member, the stability of the separator 30 can be improved, the occurrence of displacement of the separator 30 is reduced, and the shielding effect on the pressure release mechanism 1211 is weakened, thereby further improving the safety of the battery 100.

In some embodiments of the application, the second plate-like member has a dimension in the range of 1.5mm to 5mm in the direction of the snap-fit of the first portion 11 and the second portion 12 (as shown in fig. 2 and 5, where a is the direction of the snap-fit of the first portion 11 and the second portion 12 in fig. 2 and 5).

Specifically, the case body 10 includes a first portion 11 and a second portion 12 that are fastened to each other, wherein the pressure release mechanism 1211 of the battery assembly 120 located in the accommodation space 20 of the case body 10 may be disposed facing the first portion 11 or may be disposed facing the second portion 12.

Taking the arrangement of the pressure release mechanism 1211 facing the first portion 11 as an example, the spacer 30 and the heat-blocking member 40 are both disposed on the inner wall of the first portion 11 and are disposed opposite to the pressure release mechanism 1211, the first portion 11 is located above the second portion 12, and the first portion 11 is buckled with the second portion 12 along the vertical direction, where the vertical direction is the buckling direction of the first portion 11 and the second portion 12.

It should be understood that, in the buckling direction of the first portion 11 and the second portion 12, the spacer 30 is a second plate-like member, and when the dimension is smaller than 1.5mm, the strength of the spacer 30 is lower, and the spacer 30 is easily broken during the decompression process of the decompression mechanism 1211, so that the risk that the thermal runaway high-temperature material melts through the tank body 10 increases; when the size is smaller than 5mm, the spacer 30 is larger in size and occupies more space, which is disadvantageous in improving the space utilization in the tank body 10.

By providing the separator 30, which is a second plate-like member, with dimensions in the buckling direction of the first portion 11 and the second portion 12, the separator 30 is made to have a sufficient dimension to block the high-temperature substance released from the pressure release mechanism 1211, thereby reducing the occurrence of the high-temperature substance melting through the case body 10, so that the safety of the battery 100 is further improved.

It should be noted that, in the present application, the dimension of the spacer 30, which is the second plate-like member, may be 1.5mm, 2.1mm, 2.5mm, 3.1mm, 3.5mm, 4mm, 4.5mm, 5mm in the buckling direction of the first portion 11 and the second portion 12.

In some embodiments of the application, the second plate-like member has a dimension in the range of 2mm to 3mm in the direction of the snap-fit of the first portion 11 and the second portion 12 (as shown in fig. 2 and 5, where a is the direction of the snap-fit of the first portion 11 and the second portion 12 in fig. 2 and 5).

By further providing the dimension of the separator 30, which is the second plate-like member, in the buckling direction of the first portion 11 and the second portion 12, the blocking effect of the separator 30 against the high-temperature substance released by the pressure release mechanism 1211 is further improved, the situation that the high-temperature substance is melted through the case body 10 is further reduced, so that the safety of the battery 100 is further improved.

It should be noted that, in the present application, the dimension of the spacer 30, which is the second plate-like member, may be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3mm in the buckling direction of the first portion 11 and the second portion 12.

In some embodiments of the present application, the thermal barrier 40 has a size in the range of 1.5mm to 10mm in the direction of the snap-fit of the first portion 11 and the second portion 12 (as shown in fig. 2 and 5, where a is the direction of the snap-fit of the first portion 11 and the second portion 12 in fig. 2 and 5).

It should be understood that, in the buckling direction of the first portion 11 and the second portion 12, the heat-resisting member 40 has a size, and when the size is smaller than 1.5mm, the strength of the heat-resisting member 40 is lower, the heat-resisting effect of the heat-resisting member 40 is poor, and the risk of the tank body 10 being fused through is increased; when the size is smaller than 10mm, the heat blocking member 40 occupies a large space, which is disadvantageous in improving the space utilization in the tank body 10.

By providing the heat blocking member 40 with a dimension in the buckling direction of the first portion 11 and the second portion 12, the heat blocking member 40 has a sufficient dimension to block the heat of the separator 30, thereby reducing the transfer of temperature to the case body 10, reducing the case body 10 from being melted through due to high problems, and further improving the safety of the battery 100.

It should be noted that, in the present application, the heat-blocking member 40 may have a size of 1.5mm, 2.1mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5.1mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 9mm, 9.5mm, 10mm in the buckling direction of the first portion 11 and the second portion 12.

In some embodiments of the present application, the thermal barrier 40 has a size in the range of 2mm to 5mm in the direction of the snap-fit of the first portion 11 and the second portion 12 (as shown in fig. 2 and 5, where a is the direction of the snap-fit of the first portion 11 and the second portion 12 in fig. 2 and 5).

By further providing the heat blocking member 40 with a dimension in the buckling direction of the first portion 11 and the second portion 12, the heat blocking member 40 is further made to have a sufficient dimension to block the heat of the separator 30, thereby reducing the transfer of temperature to the case body 10, reducing the case body 10 from being worn out due to a high problem, and further improving the safety of the battery 100.

It should be noted that, in the present application, the heat-blocking member 40 may have a size of 2mm, 2.6mm, 3.1mm, 3.6mm, 4.1mm, 4.6mm, 5mm in the buckling direction of the first portion 11 and the second portion 12.

In some embodiments of the application, the spacer 30 is a mica member. The strength of the mica member is high, and the size of the spacer 30 in the direction in which the first portion 11 and the second portion 12 are fastened to each other can be effectively reduced, thereby effectively improving the space utilization of the box body 10.

In some embodiments of the application, the separator 30 is an inorganic fiber piece. The inorganic fiber member has low manufacturing cost, and can effectively reduce the overall cost of the battery case 110, and simultaneously, the overall cost of the battery 100 is effectively reduced.

Based on the above-described arrangement of the separator 30, the separator 30 has a good blocking effect on the pressure release mechanism 1211, so that the case body 10 is melted through during thermal runaway of the battery 100 is effectively reduced.

The second aspect of the present application proposes a battery 100, the battery 100 comprising a battery case 110 according to the above and at least one battery assembly 120, the at least one battery assembly 120 being provided in the battery case 110 of the battery 100, the battery assembly 120 having at least one battery cell 121, the battery cell 121 having a pressure release mechanism 1211, the pressure release mechanism 1211 being disposed opposite to the separator 30 of the battery case 110.

The battery 100 has the above battery case 110, and the beneficial effects of the battery case 110 are the same as those of the above battery case 110, and the present application will not be described herein.

A third aspect of the application proposes a powered device comprising a battery 100 according to the above.

The electric equipment has the battery 100, and the beneficial effects of the battery 100 are the same as those of the battery 100, and the application is not repeated here.

In an embodiment of the present application, as shown in fig. 2 to 12, the present application proposes a battery case 110, the battery case 110 including a case body 10, a separator 30, and a heat blocking member 40, the case body 10 having an accommodation space 20 for accommodating a battery assembly 120 of a battery 100, the separator 30 being disposed in the accommodation space 20 and at least between an inner wall of the case body 10 and a pressure release mechanism 1211 of the battery assembly 120, the heat blocking member 40 being disposed between the separator 30 and the inner wall of the case body 10 and opposite to the separator 30, the separator 30 being connected to the case body 10 and the heat blocking member 40, respectively.

Further, the case body 10 includes a first portion 11 and a second portion 12 that are fastened to each other, wherein the first portion 11 is disposed opposite to the pressure release mechanism 1211 of the battery assembly 120.

Further, the heat-resistant member 40 is a resin member, a metal member or a ceramic member, and the heat-resistant member 40 is a first plate-like member or a hollowed member.

Further, the spacer 30 is a mica plate.

Further, the heat-resistant member 40 abuts against the inner wall of the first portion 11, the spacer 30 abuts against the side surface of the heat-resistant member 40 facing away from the first portion 11, the edge of the spacer 30 is embedded in the annular clamping groove of the first portion 11, and the first portion 11, the spacer 30 and the heat-resistant member 40 are fixedly connected in an injection-molded connection manner.

Further, a projection area 112 is provided on the first portion 11, a first projection of the spacer 30 in the projection area 112 is consistent with the shape and size of the projection area 112, and a second projection of the heat blocking member 40 in the projection area 112 is consistent with the shape and size of the projection area 112.

Further, in the buckling direction of the first portion 11 and the second portion 12, the size of the spacer 30 is 2mm to 3mm, and the size of the heat-blocking member 40 is 2mm to 3mm.

In the battery box 110 of the present application, the heat blocking member 40 is disposed between the separator 30 and the inner wall of the box body 10, so that the separator 30 is spaced apart from the inner wall of the box body 10, and the heat of the separator 30 is blocked by the heat blocking member 40, thereby reducing the heat transfer from the separator 30 to the box body 10, reducing the case where the box body 10 is melted through due to heating, and improving the safety of the battery 100.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application, and are intended to be included within the scope of the appended claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A battery box, comprising:

2. The battery box of claim 1, wherein the heat blocking member is a first plate member or a hollowed member.

3. The battery case according to claim 1, wherein the heat blocking member is a resin member, a metal member, or a ceramic member.

4. The battery box body according to claim 1, wherein the heat-resistant member is connected to the inner wall of the box body in a manner of adhesion, welding, injection-molding, screw connection, riveting or clamping;

and/or the heat-resistant piece is connected with the isolation piece, and the connection mode between the heat-resistant piece and the isolation piece is bonding, welding, injection molding connection, screw connection, riveting or clamping connection.

5. The battery compartment of any one of claims 1 to 4, wherein the compartment body comprises a first portion and a second portion, the first portion and the second portion being snap-fit, the separator being a second plate-like member, the second plate-like member being connected to the first portion or the second portion.

6. The battery compartment of claim 5, wherein the second plate is attached to the first portion, the first portion having a projection area for facing the pressure relief mechanism, the second plate having a first projection on the projection area, the ratio of the area of the first projection to the area of the projection area ranging from 0.75 to 1.

7. The battery compartment of claim 6 wherein the thermal barrier has a second projection on the projection area, the ratio of the area of the second projection to the area of the projection area ranging from 0.75 to 1.

8. The battery compartment of claim 7, wherein the ratio of the area of the first projection to the area of the projection area is in the range of 0.85-1;

and/or the ratio of the area of the second projection to the area of the projection area is in the range of 0.85-1.

9. The battery compartment of claim 6, wherein the first portion has a retaining structure on a surface facing the receiving space, the retaining structure being disposed circumferentially of the projection area and being in snap-fit engagement with an edge of at least a portion of the second plate member.

10. The battery compartment of claim 5, wherein the second plate-like member has a dimension in the range of 1.5mm to 5mm in the direction of the snap-fit of the first portion and the second portion.

11. The battery compartment of claim 10, wherein the thermal barrier has a dimension in the range of 1.5mm to 10mm in the direction of the snap fit of the first portion and the second portion.

12. The battery compartment of claim 11, wherein the second plate-like member has a size in the range of 2mm to 3mm in the direction of the snap-fit of the first portion and the second portion;

and/or, in the buckling direction of the first part and the second part, the size range of the heat-resistant piece is 2mm-5mm.

13. The battery compartment of claim 10, wherein the separator is a mica member or an inorganic fiber member.

14. A battery, the battery comprising:

the battery case according to any one of claims 1 to 13.

15. A powered device comprising the battery of claim 14.