CN112086605B

CN112086605B - Battery, electric device, method and equipment for preparing battery

Info

Publication number: CN112086605B
Application number: CN202011121542.6A
Authority: CN
Inventors: 曾毓群; 胡浪超; 黄小腾; 洪家荣; 杨海奇; 汪文礼
Original assignee: Jiangsu Contemporary Amperex Technology Ltd
Current assignee: Jiangsu Contemporary Amperex Technology Ltd
Priority date: 2020-10-19
Filing date: 2020-10-19
Publication date: 2022-11-25
Anticipated expiration: 2040-10-19
Also published as: CN112086605A

Abstract

The present application relates to the field of battery technologies, and in particular, to a battery, an electric device, and a method and an apparatus for manufacturing a battery. Aims to solve the problem that accidents are easily caused because the pressure of emissions is difficult to release when the battery is out of control due to heat. A battery, comprising: the battery cell comprises a pressure relief mechanism, wherein the pressure relief mechanism is used for actuating to release internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value; the fire-fighting chamber is used for receiving the fire-fighting exhaust gas, the collecting chamber is used for collecting the fire-fighting exhaust gas, and the pressure relief mechanism is used for releasing the fire-fighting exhaust gas. An electric device using the battery is also disclosed. The battery in the embodiment of the application has the beneficial effects that the emissions generated by the battery monomer in thermal runaway are collected while the fire is extinguished, and the occurrence of safety accidents is reduced.

Description

Battery, electric device, method and equipment for preparing battery

Technical Field

The present application relates to the field of battery technologies, and in particular, to a battery, an electric device, and a method and an apparatus for manufacturing a battery.

Background

In a device using electric energy as a driving energy source, a battery is used as a core component of the device, so that the guarantee of the use safety of the battery is very important for guaranteeing the use safety of the whole device, and the thermal runaway of the battery is an important factor threatening the use safety of the battery.

In the current battery, when thermal runaway of one battery cell occurs, emissions are generated inside the battery cell, the emissions include substances such as high-temperature flue gas (serious people generate open fire) and volatilized high-temperature electrolyte, and the emissions can be thermally diffused in the emission process, so that thermal runaway of other battery cells is caused, and accidents such as explosion are even caused.

Disclosure of Invention

In order to timely control a thermal runaway battery monomer and reduce the occurrence of safety accidents, the application provides a battery, an electric device, a method and equipment for preparing the battery.

A first aspect of the present application provides a battery comprising:

the battery unit comprises a pressure relief mechanism, and the pressure relief mechanism is used for actuating to release internal pressure when the internal pressure or temperature of the battery unit reaches a threshold value;

a fire-fighting chamber for containing a fire-fighting medium, the fire-fighting chamber being configured to discharge the fire-fighting medium upon actuation of the pressure relief mechanism such that the fire-fighting medium enters the interior of the battery cell;

the collection cavity is used for collecting the discharge from the battery cell when the pressure relief mechanism is actuated, and the collection cavity is positioned on one side of the fire-fighting cavity far away from the battery cell;

an isolation member for isolating the fire-fighting chamber from the collection chamber;

wherein the isolation member is configured to be traversed by the emissions upon actuation of the pressure relief mechanism to pass the emissions through the fire protection chamber into the collection chamber.

In some embodiments, the isolation component is configured to be damaged by the emissions upon actuation of the pressure relief mechanism to allow the emissions to enter the collection chamber via the fire protection chamber.

In some embodiments, the isolation component is provided with a frangible portion configured to be broken by the emissions upon actuation of the pressure relief mechanism.

In some embodiments, the weakened portion is disposed opposite the pressure relief mechanism.

In some embodiments, the isolation member is provided with a through hole configured to allow the emissions to pass through the isolation member.

In some embodiments, the through hole is disposed opposite the pressure relief mechanism.

In some embodiments, the isolation component is configured as a chamber wall common to the fire-fighting chamber and the collection chamber.

In some embodiments, the battery further comprises:

a case housing for accommodating the battery cell;

the cover body is connected with the box shell to encapsulate the battery monomer;

wherein the fire fighting chamber, the collection chamber and the isolation component are configured as at least part of the cover.

In some embodiments, the cover is provided with a discharge channel for directing the emissions through the partition into the collection chamber.

In some embodiments, the vent passage is disposed opposite the pressure relief mechanism.

In some embodiments, the fire-fighting chamber is configured to be damaged by the emissions as the emissions pass through the discharge passage to discharge the fire-fighting medium.

In some embodiments, the vent passage is configured as a groove, an opening of the groove is disposed toward the pressure relief mechanism, and the exhaust enters the vent passage through the opening.

In some embodiments, the groove has a bottom wall and a sidewall connected to the bottom wall, the bottom wall is disposed opposite to the pressure relief mechanism, and the sidewall extends toward the pressure relief mechanism.

In some embodiments, the bottom wall is configured as at least part of the insulation component and the side wall is configured as at least part of a chamber wall of the fire fighting chamber.

In some embodiments, the fire-fighting chamber is configured to be damaged by the emissions upon actuation of the pressure relief mechanism to release the fire-fighting medium.

In some embodiments, the fire-fighting cavity is disposed opposite the pressure relief mechanism.

In some embodiments, the fire fighting chamber includes a receiving recess disposed opposite the pressure relief mechanism, the receiving recess formed by the fire fighting chamber being recessed toward a wall of the pressure relief mechanism to allow the fire fighting medium to flow toward the receiving recess upon actuation of the pressure relief mechanism.

In some embodiments, the accommodating recesses are provided in at least two, and adjacent two accommodating recesses are communicated with each other.

In some embodiments, the battery further includes a thermal management component for regulating the temperature of the battery cells, and the thermal management component is configured to communicate with the fire-fighting cavity to deliver the fire-fighting medium to the fire-fighting cavity.

A second aspect of the present application provides an electric device comprising the battery of the above embodiment, the battery being configured to provide electric energy.

A third aspect of the present application provides a method of manufacturing a battery, including:

providing a battery cell, wherein the battery cell comprises a pressure relief mechanism, and the pressure relief mechanism is used for actuating to relieve the internal pressure when the internal pressure or the temperature of the battery cell reaches a threshold value;

providing a fire-fighting chamber for containing a fire-fighting medium, the fire-fighting chamber being configured to discharge the fire-fighting medium upon actuation of the pressure relief mechanism such that the fire-fighting medium enters the interior of the battery cell;

providing a collection cavity, wherein the collection cavity is used for collecting the discharge from the battery cell when the pressure relief mechanism is actuated, and the collection cavity is positioned on one side of the fire fighting cavity far away from the battery cell;

providing an isolation member for isolating the fire-fighting chamber from the collection chamber;

A fourth aspect of the present application provides a manufacturing apparatus of a battery, including:

a first device for providing a cell, the cell comprising a pressure relief mechanism for actuating to relieve an internal pressure or temperature of the cell when the internal pressure or temperature reaches a threshold;

a second device for providing a fire-fighting chamber for containing a fire-fighting medium, the fire-fighting chamber being configured to discharge the fire-fighting medium upon actuation of the pressure relief mechanism such that the fire-fighting medium enters the interior of the battery cell;

a third device for providing a collection chamber for collecting emissions from the battery cell when the pressure relief mechanism is actuated, the collection chamber being located on a side of the fire protection chamber remote from the battery cell;

a fourth apparatus for providing an isolation member for isolating the fire-fighting chamber from the collection chamber;

wherein the isolation member provided by the fourth apparatus is configured to be traversed by the emissions upon actuation of the pressure relief mechanism to cause the emissions to enter the collection chamber via the fire protection chamber.

The application provides a battery sets up adjacent fire control chamber and collection chamber in the lid, it can carry out the pressure release to the fire control medium in the fire control intracavity to collect the chamber, in order to prevent the swelling or even the explosion in the fire control chamber that the battery monomer lasts the thermal runaway and leads to, make the battery in the embodiment of the application, not only can in time control the free thermal runaway condition of battery, prevent its further production of heat and high temperature emission, can also carry out the pressure release to the heat that the battery monomer has produced and emission, prevent heat and emission in the box and continuously accumulate and explode, cause further incident.

Drawings

Fig. 1-a is a schematic structural diagram of an electric device according to an embodiment of the present application.

Fig. 1-B is a schematic view of a structure of a battery in the related art.

Fig. 1-C is a schematic view of the structure of a battery module in the related art.

Fig. 1-D is a schematic view of a battery cell in the related art.

Fig. 2 is an exploded structure diagram of a battery according to an embodiment of the present application.

Fig. 3 is a schematic diagram of an exploded structure of the cover.

Fig. 4 is a schematic sectional structure view of the cover and the battery cell in an assembled state.

Fig. 5 is a partially enlarged view of a portion a in fig. 4.

Fig. 6 is a schematic structural view when the accommodating recess is provided in plurality and is not communicated with each other, and the reinforcing plate is not provided.

Fig. 7 is a cross-sectional view taken along line B-B of fig. 6, showing the receiving recess for clarity, without showing the collection chamber and the partition member.

Fig. 8 is a partially enlarged view of a portion C in fig. 7.

Fig. 9 is a schematic view when the accommodation recess is provided in plurality and connected to each other, and a reinforcing plate is provided.

Fig. 10 is a cross-sectional view taken along line D-D of fig. 9, showing the receiving recess for clarity, without showing the collection chamber and the partition member.

Fig. 11 is a partially enlarged view of a portion E in fig. 10.

FIG. 12 is a schematic view of an isolation member in an embodiment of the present application.

FIG. 13 is a schematic view of an isolation member in another embodiment of the present application.

FIG. 14 is a schematic view of an isolation member in another embodiment of the present application.

FIG. 15 is a schematic view of an isolation member in another embodiment of the present application.

Fig. 16 is a process flow diagram of a method of making a battery in an embodiment of the present application.

Fig. 17 is a schematic diagram of a battery manufacturing apparatus according to an embodiment of the present application.

Description of reference numerals: 200. a battery; 210. a controller; 220. a motor;

300. a battery module; 201. a first case; 202. a second case; 30. An electrode assembly; 301. a tab; 10. an end cap assembly; 10', end cover plates; 20. a connecting member; 40. a liquid injection member;

1. a cabinet housing; 2. a cover body; 21. an upper plate; 211. a reinforcing plate; 212. a side plate; 22. an isolation member; 221. a weakened portion; 222. a through hole; 23. a lower layer plate; 231. an accommodating recess; 24. a collection chamber; 25. a fire-fighting cavity; 26. a discharge passage; 261. a bottom wall; 262. a side wall; 27. a valve; 3. a battery cell; 31. a housing; 32. an electrode terminal; 33. a pressure relief mechanism;

401. a first device; 402. a second device; 403. a third device; 404. and a fourth device.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the embodiments described herein are merely illustrative of the present application, and are not intended to limit the scope of the present application, and therefore: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection 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 in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof in the description and claims of this application and the description of the figures are intended to cover a non-exclusive inclusion.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "embodiment" 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. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

Furthermore, the terms "first," "second," and the like in the description and claims of the present application or in the above-described drawings are used for distinguishing between different objects and not necessarily for describing a particular sequential order, and may explicitly or implicitly include one or more of the features.

In the description of the present application, unless otherwise specified, "plurality" means two or more (including two), and similarly, "plural groups" means two or more (including two).

In the description of the present application, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected" and "connected" should be interpreted broadly, for example, mechanical structures "connected" or "connected" may refer to physical connections, which may be fixed connections, for example, by fasteners, such as screws, bolts or other fasteners; the physical connection can also be a detachable connection, such as a mutual clamping or clamping connection; the physical connection may also be an integral connection, for example, a connection made by welding, gluing or integrally forming. "connected" or "coupling" of circuit structures may mean not only physical coupling but also electrical or signal coupling, for example, direct coupling, i.e., physical coupling, or indirect coupling via at least one element therebetween, as long as electrical communication is achieved, or communication between the two elements; signal connection may refer to signal connection through a medium, such as radio waves, in addition to signal connection through circuitry. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

In order to clearly describe the respective orientations in the following embodiments, terms of orientation may be used, for example, directions of the respective orientations of the battery 200 are defined as a coordinate system in fig. 1-D, an X direction indicates a length direction of the battery cell 3, a Y direction is perpendicular to the X direction in a horizontal plane indicates a width direction of the battery cell 3, and a Z direction is perpendicular to the X direction and the Y direction indicates a height direction of the battery 200. Further, the expressions of the directions of indication such as the X direction, the Y direction, and the Z direction described above for explaining the operation and configuration of each member of the battery 200 of the present embodiment are not absolute but relative, and although these indications are appropriate when each member of the battery 200 is in the position shown in the drawings, when the position is changed, these directions should be interpreted differently to correspond to the change.

With the same orientation in mind, in the description of the present application, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientation or positional relationship illustrated in the drawings for convenience in describing the present application and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.

The rechargeable battery may be referred to as a secondary battery or a power battery, and at present, a relatively widely used rechargeable battery is a lithium battery, for example, but not limited to, a lithium-sulfur battery, a sodium lithium-ion battery, or a magnesium-ion battery. For convenience of description, the rechargeable battery may be collectively referred to herein as the battery 200.

The safety characteristic of the battery 200 is an important characteristic of the battery 200, and it is required to ensure the safety of the battery 200 as much as possible when the battery is used or charged.

The battery 200 is generally formed by connecting and combining a plurality of battery cells 3, when external short circuit, overcharge, needle prick, flat plate impact and the like occur to the battery cells 3, thermal runaway of the battery cells 3 is easily generated, emissions are generated inside the battery cells 3, the emissions include high-temperature smoke (serious people generate open fire) and volatilized high-temperature electrolyte and other substances, and the emissions are thermally diffused in the process of emission, so that thermal runaway of other battery cells 3 is caused, and even accidents such as explosion and the like are also caused.

Aiming at thermal runaway of the battery monomer 3, an effective scheme at present is to provide a fire protection system, and when the thermal runaway of the battery monomer 3 occurs, the fire protection system can protect against fire so as to prevent or delay explosion or fire of the battery monomer 3.

The fire fighting system is generally disposed opposite to the pressure relief mechanism 33 of the battery cell 3, for example, the fire fighting system may be disposed in the cover 2 at the top of the box 1 containing the battery 200, for example, a fire fighting cavity 25 containing fire fighting medium is disposed in the cover 2, when the discharge of the battery cell 3 damages the cavity wall of the fire fighting cavity 25, the fire fighting medium flows out and enters the battery cell 3, and the discharge of the battery cell 3 may also enter the fire fighting cavity 25.

However, the inventor has found through long-term research that when a large amount of emissions enter the fire fighting cavity 25 of the cover body 2, the cover body 2 is prone to have safety problems such as bulging and even explosion, which is mainly because the cover body 2 is generally made of nonmetal or metal thin plate, the strength is low, and the volume of the fire fighting cavity 25 is small, and during the fire fighting process, the emissions and the temperature in the box body are still continuously increased, and sometimes the volume of the fire fighting cavity 25 is difficult to meet the emission accommodation requirement due to the rapid increase of the amount of emissions generated by thermal runaway.

Although the fire extinguishing agent is adopted to extinguish the fire of the battery cell 3 which is in thermal runaway in the related art, the fire-fighting cavity 25 cannot discharge the emissions generated in the thermal runaway process, when the amount of the emissions reaches a certain degree, the box body is deformed if the emissions are light, and explosion if the emissions are heavy occurs, so that serious safety accidents occur.

In view of this, the present application provides a battery, for the fire-fighting cavity 25 containing fire-fighting medium in the cover body 2, an adjacent collection cavity 24 is added for collecting the emissions in the fire-fighting cavity 25, so as to achieve the pressure relief effect. Therefore, the battery 200 that this application provided, not only can in time control the thermal runaway condition of battery monomer 3, prevent that it from further producing heat and high temperature emission, can also carry out the pressure release to the heat that battery monomer 3 has produced and emission, prevent that heat and emission in the box are continuous to be accumulated and the explosion, cause further incident.

The battery 200 in the embodiment of the present application may be applied to various electric devices capable of providing a power source with electric energy. The electric device herein may be, but is not limited to, an electric car, an electric train, an electric bicycle, a golf cart, a ship, and the like. The electric device may be a device powered only by the battery 200, or may be a hybrid device. The battery 200 provides electric energy for the electric device and drives the electric device to move forward through the motor.

For example, as shown in fig. 1-a, which is a schematic structural diagram of an electric device according to an embodiment of the present application, the electric device may be an automobile, the automobile may be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile may be a pure electric automobile, a hybrid electric automobile, or an extended range automobile. The automobile includes a battery 200, a controller 210, and a motor 220. The battery 200 is used to supply power to the controller 210 and the motor 220 as an operation power source and a driving power source of the automobile, for example, the battery 200 is used for a power demand for operation at the start, navigation and running of the automobile. For example, the battery 200 supplies power to the controller 210, the controller 210 controls the battery 200 to supply power to the motor 220, and the motor 220 receives and uses the power of the battery 200 as a driving power source of the automobile, instead of or in part replacing fuel or natural gas to provide driving power for the automobile.

In order to achieve a higher function of the battery 200 to meet the use requirement, the battery 200 may include a plurality of battery modules 300 electrically connected to each other, as shown in fig. 1-B, the battery 200 includes a first case 201, a second case 202, and a plurality of battery modules 300, wherein the first case 201 and the second case 202 are fastened to each other, and the plurality of battery modules 300 are arranged in a space enclosed by the first case 201 and the second case 202. In some embodiments, the first case 201 and the second case 202 are hermetically connected.

As shown in fig. 1-C, the battery module 300 includes a plurality of battery cells 3, and the plurality of battery cells 3 may be electrically connected in series, in parallel, or in series-parallel to realize a larger current or voltage, wherein the series-parallel refers to a combination of series connection and parallel connection. For example, as shown in fig. 1-C, the battery cells 3 may be placed vertically, the height direction of the battery cells 3 coincides with the vertical direction, and a plurality of battery cells 3 are arranged side by side in the width direction; alternatively, the battery cells 3 may be laid flat, the width direction of the battery cells 3 is coincident with the vertical direction, and the plurality of battery cells 3 may be stacked in the width direction in at least one layer, each layer including the plurality of battery cells 3 arranged in the length direction.

In order to make the improvement point of the present application clear to those skilled in the art, the overall structure of the battery cell 3 will be described first.

As shown in fig. 1-D, the battery cell 3 includes a case 31, an electrode assembly 30, and an end cap assembly 10, the end cap assembly 10 includes an end cap plate 10', the end cap plate 10' is connected (e.g., welded) to the case 31 to form a housing of the battery cell 3, the electrode assembly 30 is disposed in the case 31, and the case 31 is filled with an electrolyte. The battery cell 3 may have a cubic shape, a rectangular parallelepiped shape, or a cylindrical shape.

The electrode assembly 30 may be provided in a single or plural number according to the actual use requirement. As shown in fig. 1-D, at least two independently wound electrode assemblies 30 may also be disposed within the cell 200. The electrode assembly 30 may form the main body part by winding or stacking a first pole piece, a second pole piece, and a separator between the adjacent first and second pole pieces together, wherein the separator is an insulator between the adjacent first and second pole pieces. In this embodiment, the first pole piece is exemplarily described as a positive pole piece, and the second pole piece is a negative pole piece. The positive active material is coated on the coating region of the positive electrode tab, and the negative active material is coated on the coating region of the negative electrode tab. A plurality of uncoated regions extending from the coated region of the body portion are laminated as the tab 301. The electrode assembly 30 includes two tabs 301, i.e., a positive electrode tab and a negative electrode tab. The positive tab extends from the coated area of the positive pole piece and the negative tab extends from the coated area of the negative pole piece.

The end cap assembly 10 is disposed on top of the electrode assembly 30, and as shown in fig. 1-D, the end cap assembly 10 includes an end cap plate 10 'and two electrode terminals 32, the two electrode terminals 32 are a positive electrode terminal and a negative electrode terminal, respectively, one connecting member 20 is disposed corresponding to each electrode terminal 32, and the connecting member 20 is located between the end cap plate 10' and the electrode assembly 30.

For example, a tab 301 of the electrode assembly 30 is located at the top in fig. 1-D, and a positive tab is connected to a positive terminal through one connecting member 20, and a negative tab is connected to a negative terminal through the other connecting member 20. For example, the battery cell 3 may include two end cap assemblies 10 respectively disposed at both ends of the case 31, and one electrode terminal 32 is disposed on each of the end cap assemblies 10.

The end cover plate 10' can also be provided with an explosion-proof component, when too much gas exists in the battery monomer 3, the gas in the battery monomer 3 can be released in time, and explosion is avoided.

The end cover plate 10 'is provided with vent holes which can be arranged at the middle position of the end cover plate 10' along the length direction. The explosion-proof component comprises a pressure relief mechanism 33, the pressure relief mechanism 33 is arranged on the exhaust hole, the pressure relief mechanism 33 is hermetically arranged on the exhaust hole in a normal state, when the single battery 3 expands to enable the air pressure in the shell to rise to exceed a preset value, the pressure relief mechanism 33 is opened, and the air is released outwards through the pressure relief mechanism 33.

The pressure relief mechanism 33 refers to an element or a component that can be actuated to release internal pressure and/or internal substance when the internal pressure or internal temperature of the battery cell 3 reaches a predetermined threshold value. The pressure relief mechanism 33 may specifically take the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically take the form of a pressure-sensitive or temperature-sensitive element or configuration, that is, when the internal pressure or temperature of the battery cell 3 reaches a predetermined threshold value, the pressure relief mechanism 33 performs an action or a weak structure provided in the pressure relief mechanism 33 is broken, thereby forming an opening or a passage through which the internal pressure can be released. The threshold referred to in this application may be a pressure threshold or a temperature threshold, the design of which varies according to the design requirements, for example, the threshold may be designed or determined according to the internal pressure or internal temperature value of the battery cell 3 that is considered to be at risk of danger or runaway. And, the threshold value may depend on, for example, the material used for one or more of the positive electrode tab, the negative electrode tab, the electrolyte, and the separator in the battery cell 3.

The "actuation" referred to in this application means that the pressure relief mechanism 33 is activated or activated to a state such that the internal pressure of the battery cell 3 is released. The actions generated by the pressure relief mechanism 33 may include, but are not limited to: at least a portion of the pressure relief mechanism 33 ruptures, fractures, is torn or opened, or the like. When the pressure relief mechanism 33 is activated, the high-temperature and high-pressure substance inside the battery cell 3 is discharged as an exhaust from the activated portion. In this way, the battery cells 3 can be vented under controlled pressure or temperature, so that potentially more serious accidents can be avoided. The emissions from the battery cells 3 referred to in this application include, but are not limited to: electrolyte, dissolved or split anode and cathode pole pieces, fragments of a separation film, high-temperature and high-pressure gas generated by reaction, flame and the like. The high-temperature and high-pressure exhaust is exhausted toward the direction of the battery cell 3 in which the pressure relief mechanism 33 is provided, and may be more specifically exhausted in the direction toward the region where the pressure relief mechanism 33 is actuated, and the power and destructive power of such exhaust may be large, and may even be sufficient to break through one or more structures in that direction.

In some embodiments, as shown in fig. 1-D, the end cap plate 10 'is provided with a through hole for injecting an electrolyte into the battery cell 3, and the through hole may be a circular hole, an elliptical hole, a polygonal hole, or another hole, and may extend in the height direction of the end cap plate 10'. The end cover plate 10' is provided with a liquid injection member 40 for sealing the through hole.

To solve the above-mentioned problems of the battery 200 during use, the present application provides a specific structure of the battery 200 as follows.

Referring to fig. 2, the battery 200 includes: case 1, cover 2, and at least one battery module 300. The case 1 has a hollow structure and an opening, and the case 1 and the cover 2 are combined with each other at the opening to form a case having a receiving cavity for receiving at least one battery module 300.

For example, the housing 1 and the cover 2 may be welded, bolted, screwed, bonded, etc. to form a case for accommodating one or more battery modules 300, and an opening above the housing 1 is used for accessing the battery modules 300 during installation or replacement. The cabinet 1 and the lid 2 may be made of aluminum, aluminum alloy, or other metal material.

The cover 2 is hermetically connected to the case 1 to close the opening in the case 1, thereby enclosing the battery module 300 in the case.

Referring to fig. 2, the battery module 300 may include one or more battery cells 3, and when the battery module 300 includes a plurality of battery cells 3, the plurality of battery cells 3 may be arranged according to a predetermined rule, for example, the plurality of battery cells 3 are aligned in a line.

Referring to fig. 3, 4 and 5, the cover 2 in the embodiment of the present application includes an upper plate 21, a lower plate 23 and a partition member 22, the upper plate 21 is a panel of the cover 2 away from the cabinet 1, the lower plate 23 is a panel of the cover 2 close to the cabinet 1, for example, the upper plate 21 and the lower plate 23 are substantially parallel, the upper plate 21 and the lower plate 23 form a cavity by a side panel 212 at their periphery, and the partition member 22 is used for dividing the cavity into a collection chamber 24 and a fire-fighting chamber 25, wherein the partition member 22 may be in a plate shape, the collection chamber 24 and the fire-fighting chamber 25 are distributed in a direction perpendicular to the lower plate 23, and the fire-fighting chamber 25 is located below the collection chamber 24 in a direction perpendicular to the lower plate 23, so that the fire-fighting chamber 25 is close to the battery cell 3 and the collection chamber 24 is far from the battery cell 3.

For example, the edge of the upper plate 21 extends to the side of the cabinet 1 to form a side plate 212, the side plate 212 is combined with the lower plate 23 to form a cavity, for example, the side plate 212 is welded and combined with the lower plate 23, a fire-fighting cavity 25 is formed between the isolation component 22 and the lower plate 23, a collection cavity 24 is formed between the isolation component 22 and the upper plate 21, the isolation component 22 is a cavity wall shared by the fire-fighting cavity 25 and the collection cavity 24 and is used for isolating the fire-fighting cavity 25 from the collection cavity 24, wherein the isolation component 22 isolates the fire-fighting cavity 25 from the collection cavity 24 by separating the two cavities and does not limit whether the fire-fighting cavity 25 is communicated with the collection cavity 24, for example, the fire-fighting cavity 25 and the collection cavity 24 can be communicated through a through hole of the isolation component 22, the fire-fighting cavity 25 can be not communicated with the collection cavity 24, for example, the isolation component 22 does not have a through hole. The edges of the spacer member 22 and the lower plate 23 may be glued or welded to the side plates 212.

The interior of the fire-fighting cavity 25 contains a fire-fighting medium. The fire-fighting medium can be a liquid fire-extinguishing agent, such as water, liquid nitrogen and the like, or a solid powder fire-extinguishing agent, such as a dry powder fire-extinguishing agent, a fluoroprotein foam fire-extinguishing agent, an aqueous film-forming foam fire-extinguishing agent and the like, and for example, liquid water which has a large specific heat capacity, can rapidly cool the battery monomer 3 with thermal runaway, and has low cost and low storage requirement is adopted as the fire-fighting medium. And the lower plate 23 is in a closed state between the side plate 212 of the upper plate 21 and the normal state of the battery 200 to store water.

Referring to fig. 4 and 5, in order to enable the fire-fighting medium to enter the interior of the battery cell 3 more accurately, prevent the generation of heat and emissions in the battery cell 3 from thermal runaway at a higher speed, and prevent heat diffusion, a pressure relief mechanism 33 on the battery cell 3 is disposed opposite to the fire-fighting cavity 25.

When the fire-fighting medium is a liquid fire-fighting agent, in order to protect the electrode terminal 32 of the battery cell 3 and the confluence part (not shown) connected to the electrode terminal 32 and avoid an accident that the fire-fighting medium sprays onto the electrode terminal 32 and the confluence part to cause a short circuit or even a more dangerous accident, referring to fig. 1 and 3, the electrode terminal 32 and the pressure relief mechanism 33 of the battery cell 3 in the embodiment of the present application are respectively located on different surfaces of the battery cell 3, for example, the electrode terminal 32 and the pressure relief mechanism 33 are respectively located on two mutually perpendicular surfaces of the battery cell 3, for example, the surface of the battery cell 3 where the pressure relief mechanism 33 is located may be referred to as an upper surface of the battery cell 3, the surface of the battery cell 3 where the electrode terminal 32 is located may be referred to as a side surface of the battery cell 3, the upper surface and the side surface are mutually perpendicular to each other, and the confluence part connected to the battery cell 3 is also located on the side surface of the battery cell 3, which ensures that the fire-fighting medium does not spray onto the electrode terminal 32 and the confluence part to some extent, thereby ensuring safety in the fire-fighting process.

Referring to fig. 5, in order to extinguish the fire and cool the thermal runaway battery cell 3 as soon as possible when the pressure relief mechanism 33 ejects the emissions, the whole lower plate 23, or at least the part of the lower plate 23 opposite to the pressure relief mechanism 33, is set to be a structure easily damaged by the emissions, and the form of "damage" here includes but is not limited to one of penetration, rupture, breaking and tearing. In the embodiment of the application, construct the weak structure or the low melting point structure that the high temperature high pressure emission that is convenient for by the inside production of battery cell 3 melts through with the just department of pressure relief mechanism 33 lower plate 23, thereby when discharging from actuating pressure relief mechanism 33 at high temperature high pressure emission, the emission melts down lower plate 23 rapidly, the fire control chamber 25 is destroyed with the fire control medium in the fire control chamber 25 of releasing with the chamber wall that pressure relief mechanism 33 set up relatively, the fire control medium passes through pressure relief mechanism 33 and gets into the inside of battery cell 3, thereby carry out the cooling of putting out a fire to battery cell 3 of thermal runaway and handle.

The facing portion of the lower plate 23 and the pressure relief mechanism 33 is configured as a weak structure, and may be configured such that the strength of the facing portion is smaller than that of the rest of the lower plate 23, for example, the thickness of the facing portion is smaller than that of the rest of the lower plate 23; or, the opposite position is a through hole.

The facing portion of the lower plate 23 and the pressure relief mechanism 33 may be configured as a low melting point structure such that the melting point of the facing portion is lower than that of the rest of the lower plate 23.

In other embodiments of the present application, the lower plate 23 and the pressure relief mechanism 33 may be directly opposite to each other to form a sheet structure connected to the rest of the lower plate 23 through an easy-to-tear line, so that the discharged material discharged by the pressure relief mechanism 33 is conveniently burst to discharge the fire-fighting medium, and the fire-fighting medium enters the inside of the battery cell 3 through the pressure relief mechanism 33, so as to perform fire extinguishing and temperature reduction processing on the battery cell 3 in thermal runaway.

In the embodiments of the present application, the "easy-to-tear line" refers to an intermittent scribe line formed by intermittently breaking between a portion to be torn and a portion not to be torn by an external force, the broken material is light and thin but does not penetrate through the broken material, the broken material can be torn by a slight external force, the original material thickness is retained in the undamaged material portion, and thus a connection line formed by intermittent breaking is called an easy-to-tear line. The tear line may be formed by a laser-beam punch, laser marking machine, laser scribing machine or laser cutting machine.

Referring to fig. 6 to 11, in order to make the fire fighting cavity 25 be more easily destroyed when the pressure relief mechanism 33 is actuated and make the fire fighting medium in the fire fighting cavity 25 flow into the battery cell 3 more easily, an accommodating recess 231 is provided on the lower plate 23 as a cavity wall of the fire fighting cavity 25, the accommodating recess 231 is formed by recessing the lower plate 23 to one side of the battery cell 3, a surface of the lower plate 23 away from the battery cell 3 is recessed to form the accommodating recess 231, an opening of the accommodating recess 231 faces the isolation member 22, and a thickness of the accommodating recess 231 is smaller than a thickness of other parts of the lower plate 23, so that the accommodating recess 231 is easily destroyed by emissions of the battery cell 3, the accommodating recess 231 is provided with one or more, and each accommodating recess 231 is disposed opposite to at least one pressure relief mechanism 33.

Above-mentioned fire control chamber 25's structure makes the distance that holds between concave part 231 and the pressure relief mechanism 33 nearer, and also comparatively weak in the thickness to can be when pressure relief mechanism 33 actuates, the discharge that is produced by battery monomer 3 melts and wears to destroy fast, with the cooling of putting out a fire of release fire control medium, prevents thermal diffusion's emergence. In addition, after the accommodating concave part 231 is damaged, the accommodating concave part 231 can also play a role in guiding the fire-fighting medium in the fire-fighting cavity 25 to flow into the accommodating concave part 231 and continuously flow towards the damaged part of the accommodating concave part 231, so that the fire-fighting medium enters the battery unit 3 as soon as possible, and the effect of quickly inhibiting thermal runaway is achieved.

Referring to fig. 6 to 8, when the accommodating recesses 231 are provided in two or more, adjacent two accommodating recesses 231 may be separated from each other independently, and the fire fighting medium inside each accommodating recess 231 circulates inside the accommodating recess 231, so that a certain amount of fire fighting medium can be maintained inside each accommodating recess 231.

In addition, referring to fig. 9 to 11, when the accommodating recess 231 is provided in two or more, two adjacent accommodating recesses 231 may be communicated with each other, for example, two adjacent accommodating recesses 231 are communicated with each other through the diversion trench, the opening direction of the diversion trench is the same as the opening direction of the accommodating recess 231, so that the fire-fighting media inside different accommodating recesses 231 may be communicated with each other, and when one pressure relief mechanism 33 corresponding to one accommodating recess 231 is actuated, the fire-fighting media inside each accommodating recess 231 may all flow to the pressure relief mechanism 33, thereby ensuring sufficient supply of the fire-fighting media.

At the instant and for a brief period of time after the cavity wall of the fire fighting cavity 25 is broken, the thermal runaway battery cell 3 generates heat and emissions, which are charged in the fire fighting cavity 25, and is discharged through the pressure relief mechanism 33.

In order to avoid the situation that the air pressure in the fire fighting cavity 25 is increased to a certain extent to cause swelling due to heat and emissions, and a serious person causes explosion, etc., in the embodiment of the present application, the collection cavity 24 is disposed on the side of the fire fighting cavity 25 away from the battery cell 3, and the isolation component 22 is configured as a structure that can be penetrated by the emissions when the pressure relief mechanism 33 is actuated, so that the emissions enter the collection cavity 24 through the fire fighting cavity 25, the situation that the air pressure in the fire fighting cavity 25 is too high is relieved, and a serious safety accident is avoided.

Referring to fig. 12, in the battery 200 disclosed in an embodiment of the present application, the isolation member 22 is configured to be broken by the emissions when the pressure relief mechanism 33 is actuated, so that the emissions enter the collection chamber 24 via the fire fighting chamber 25. The form of "breaking" herein includes, but is not limited to, one of piercing, breaking, tearing.

For example, the separation member 22 includes at least one weak portion 221, the weak portion 221 is disposed opposite to the pressure relief mechanism 33, the weak portion 221 is a weak structure or a low-melting point structure that is easily melted through or broken by high-temperature and high-pressure exhaust generated inside the battery cell 3 in the present embodiment, for example, the weak portion 221 is a part of the separation member 22, and the weak portion 221 has a lower strength than other parts of the separation member 22, for example, the weak portion 221 has a thickness smaller than other parts of the separation member 22; or the weak part 221 is connected with the rest parts of the isolation part 22 through the easy-to-tear line, so that after the high-temperature and high-pressure discharge material breaks the lower laminate 23, the discharge material quickly breaks the weak part 221 in a fusion or high-pressure breaking mode while the fire-fighting medium is discharged from the fire-fighting cavity 25, and the discharge material enters the collection cavity 24, the collection cavity 24 can release the pressure of the discharge material in the fire-fighting cavity 25, the battery 200 is prevented from being swelled and exploded, and the use safety of the battery 200 is improved.

Referring to fig. 13, a battery 200 according to another embodiment of the present application is substantially the same as the battery of the above-described embodiment except for the structure of the separator 22.

For example, the partition member 22 in this embodiment is provided with a through hole 222, and the through hole 222 communicates the fire fighting chamber 25 and the collecting chamber 24, thereby allowing the discharge to pass through the partition member 22 into the collecting chamber 24 through the through hole 222 after the chamber wall of the fire fighting chamber 25 is damaged.

The through hole 222 in this embodiment is located opposite the pressure relief mechanism 33, so that the exhaust rapidly enters the collection chamber 24 directly through the fire fighting chamber 25, relieving the pressure in the fire fighting chamber 25.

Referring to fig. 14, another embodiment of the present application is substantially the same as the other embodiments, except that: an exhaust channel 26 is further disposed between the isolation component 22 and the lower plate 23, the exhaust channel 26 is used for rapidly guiding the emissions into the collection cavity 24, the exhaust channel 26 is disposed opposite to the pressure relief mechanisms 33, each exhaust channel 26 corresponds to one or more pressure relief mechanisms 33, for example, one exhaust channel 26 corresponds to one pressure relief mechanism 33 on one battery cell 3 or a plurality of pressure relief mechanisms 33 on the battery cells 3.

The discharge passage 26 in this embodiment is configured as a groove, the opening of which is provided toward the pressure relief mechanism 33. The concrete structure of recess does: the recess has a bottom wall 261 and a side wall 262 connected to the bottom wall 261, the bottom wall 261 being configured to isolate at least a portion of the component 22, the side wall 262 being configured to isolate at least a portion of the chamber wall of the fire chamber 25 from the discharge passage 26; the bottom wall 261 is disposed opposite to the pressure relief mechanism 33, where the bottom wall 261 is configured the same as the weak portion 221 in the foregoing embodiment; the side wall 262 extends toward the pressure relief mechanism 33, in this embodiment, the side wall 262 is directly connected to the bottom wall 261, and an end of the side wall 262 away from the bottom wall 261 abuts against the lower plate 23.

The fire chamber 25 is breached by the emissions as they pass through the exhaust passage 26 and discharges the fire-fighting medium. At the same time, the emissions enter the discharge channel 26 via the opening of the discharge channel 26 and break the bottom wall 261 of the groove, the discharge channel 26 serving to guide the emissions through the partition 22 into the collection chamber 24 for collection thereof.

Referring to fig. 15, another embodiment of the present application is substantially the same as the above embodiment, except that: the discharge channel 26 in the present embodiment is configured to have only the side wall 262 connected to the side of the lower plate 23 remote from the battery cell 3, the side wall 262 extending in a direction away from the battery cell 3; the partition member 22 has the same structure as that of the previous embodiment having the through-hole 222, and the side wall 262 abuts against the edge of the through-hole 222 or is inserted into the through-hole 222 to seal the fire fighting chamber 25.

The fire chamber 25 is breached by the emissions as they pass through the exhaust passage 26 and discharges the fire-fighting medium. At the same time, the emissions enter the discharge channel 26 via the area enclosed by the side wall 262, pass through the through-holes 222 in the partition member 22 and enter the collection chamber 24, where they are collected.

Referring to fig. 1 and 2, in the above embodiments, the collecting cavity 24 may be saturated by air pressure, and therefore, a pressure-actuated valve 27 such as an explosion-proof valve, an air valve, a pressure relief valve or a safety valve may be provided on the cover 2, so as to discharge the emissions collected by the collecting cavity 24 when the battery cell 3 is in thermal runaway to the outside of the battery 200, thereby improving the safety of the battery 200.

And, referring to fig. 8, 9 and 10, in order to prevent the upper plate 21 of the cover 2 from being penetrated by high-temperature and high-pressure emissions, a reinforcing plate 211 is provided on the upper plate 21, and the reinforcing plate 211 may be constructed in a thickened structure integrated with the upper plate 21; it can also be constructed as a reinforcing structure welded or glued or screwed to the upper plate 21; the reinforcing plate 211 can be a metal plate, and can also be a light refractory plate such as a mica plate, a rock wool plate, a floating bead plate, a vermiculite plate and the like; the reinforcing plate 211 may be provided inside the lid body 2 or outside the lid body 2; the reinforcing plate 211 may cover the upper plate 21 as a whole, or may be provided only at a position of the upper plate 21 with respect to the receiving recess 231 of the lower plate 23. Only the schematic view of the reinforcing plate 211 when it is arranged on the upper plate 21 in relation to the receiving recess 231 on the lower plate 23 and outside the cover 2 is shown, and the rest of the arrangement of the reinforcing plate 211 is not shown in the figure, but can be reasonably deduced by the person skilled in the art and is not shown in the figure.

Since the upper plate 21 of the cover 2 is reinforced, it is not easily penetrated by emissions, ensuring the safety of the battery 200.

In another embodiment of the present application, the fire-fighting medium in the fire-fighting chamber 25 may be pre-loaded in the fire-fighting chamber 25.

In another embodiment of the present application, the battery 200 further includes a thermal management component (not shown) for regulating the temperature of the battery cells 3, and the thermal management component is configured to communicate with the fire fighting cavity 25 to deliver a fire fighting medium to the fire fighting cavity 25. The fire-fighting medium can not only carry out temperature control to battery monomer 3 through the thermal management part, can also take place when thermal runaway at battery monomer 3, and the thermal management part carries the fire-fighting medium to fire control chamber 25 to reach the effect of guaranteeing the sufficient supply of fire-fighting medium.

The thermal management component is generally disposed at the bottom of the battery cell 3 and is used for adjusting the temperature of the battery cell 3, for example, the thermal management component is used for cooling the battery cell 3 or heating the battery cell 3 to a preset temperature. In the case of cooling or temperature reduction of the battery cells 3, the thermal management component is used for containing a cooling fluid to reduce the temperature of the plurality of battery cells 3, in this case, the thermal management component may also be referred to as a cooling component, a cooling system, a cooling plate, or the like, the contained fluid may also be referred to as a cooling medium or a cooling fluid, more specifically, may be referred to as a cooling liquid or a cooling gas, the contained fluid may also be directly a fire-fighting medium, and the fluid may be set to circulate. In addition, the thermal management component may also be used to heat the plurality of battery cells 3 to increase the temperature, which is not limited in the embodiment of the present application.

For example, the thermal management unit includes a connection pipe extending through the case to the outside of the case 1 and connected to a liquid storage container (not shown) provided outside the battery 200, the liquid storage container containing a fire fighting medium, wherein the thermal management unit and the liquid storage container constitute a circulation circuit through the connection pipe. The thermal management component is configured to communicate with the fire protection chamber 25, for example, the thermal management component communicates with the fire protection chamber 25 through a pipe, or the thermal management component, the fire protection chamber 25, and the connecting tube communicate through a tee.

When the thermal management part needs to lower the temperature of the battery cell 3, a lower temperature fire fighting medium circulates between the liquid storage container and the thermal management part through the connection pipe to lower the temperature of the battery cell 3. When the heat management part needs to improve the temperature of the battery monomer 3, a fire-fighting medium with higher temperature can be filled in the liquid storage container, the fire-fighting medium circularly flows between the liquid storage container and the heat management part through the connecting pipe, the temperature rise of the battery monomer 3 is realized, the temperature of the battery monomer 3 is regulated, and the battery monomer 3 is ensured to work at a preset temperature so as to ensure the use performance of the battery 200.

To sum up, the battery 200 that this application provided sets up adjacent fire control chamber 25 and collection chamber 24 in lid 2, collect chamber 24 and can carry out the pressure release to the fire control medium in the fire control chamber 25, fire control chamber 25's bulge is even exploded when stopping battery monomer 3 thermal runaway, make battery 200 in this application embodiment, not only can in time control battery monomer 3's thermal runaway condition, prevent its further heat and high temperature emission, can also carry out the pressure release to the heat that battery monomer 3 has produced and emission, prevent that heat and emission in the box from lasting accumulation and explosion, cause further incident.

Since the battery 200 of the present application has the above characteristics, the electric device for supplying electric energy using the battery 200 of the present application is not likely to cause a safety accident due to explosion of the battery, and is highly safe in use.

In addition, the present application also provides a method for preparing the battery 200 described above.

Referring to fig. 16, in an embodiment of the present application, a method of manufacturing a battery 200 includes:

step a: the battery cells 3 are provided, the number of the battery cells 3 may be one or more, the battery cells 3 include a pressure relief mechanism 6, and the pressure relief mechanism 6 is configured to be actuated to relieve the internal pressure when the internal pressure or temperature of the battery cells 3 reaches a threshold value.

Step b: a fire chamber 25 is provided, the fire chamber 25 being for containing a fire-fighting medium, in some embodiments the fire chamber 25 is configured to discharge the fire-fighting medium upon actuation of the pressure relief mechanism 33, such that the fire-fighting medium enters the interior of the battery cell 3.

Step c: a collection chamber 24 is provided, the collection chamber 24 being for collecting emissions from the battery cell 3 upon actuation of the pressure relief mechanism 33, and the collection chamber 24 being located on a side of the fire protection chamber 25 remote from the battery cell 3.

Step d: providing an isolation member 22, the isolation member 22 being for isolating the fire-fighting chamber 25 from the collection chamber 24;

wherein the isolation member 22 is configured to be traversed by the emissions upon actuation of the pressure relief mechanism 33 such that the emissions enter the collection chamber 24 via the fire fighting chamber 25.

The sequence of the above steps is not completely performed according to the above sequence, and in the actual manufacturing process of the battery 200, the sequence of the above steps may be adjusted according to actual conditions, or performed simultaneously, or other steps may be added to manufacture other components of the battery 200, so as to finally obtain the desired battery 200, specifically referring to the embodiment of the battery 200.

Any method that can manufacture the related components and connect the related components falls within the scope of the embodiments of the present application, which are not described in detail herein.

A fourth aspect of the present application provides a manufacturing apparatus of a battery, referring to fig. 17, the manufacturing apparatus of a battery including:

a first device 401 for providing a battery cell 3, the battery cell 3 comprising a pressure relief mechanism 33, the pressure relief mechanism 33 being adapted to be actuated to relieve an internal pressure of the battery cell 3 when the internal pressure or temperature reaches a threshold value;

a second device 402 for providing a fire-fighting chamber 25, the fire-fighting chamber 25 being for containing a fire-fighting medium, and the fire-fighting chamber 25 being configured to discharge the fire-fighting medium upon actuation of the pressure-discharge mechanism 33, so that the fire-fighting medium enters the interior of the battery cell 3;

a third device 403 for providing a collection chamber 24, the collection chamber 24 being for collecting emissions from the battery cell 3 when the pressure relief mechanism 33 is activated, and the collection chamber 24 being located on a side of the fire fighting chamber 25 remote from the battery cell 3;

a fourth device 404 for providing an isolation member 22, the isolation member 22 for isolating the fire chamber 25 from the collection chamber 24;

wherein the isolation member 22 provided by the fourth apparatus 404 is configured to be traversed by the emissions upon actuation of the pressure relief mechanism 33 such that the emissions enter the collection chamber 24 via the fire fighting chamber 25.

The specific functions and details that each apparatus for preparing the battery 200 should have are already described in detail in the corresponding embodiment of the battery 200, and therefore are not described herein again.

The above-mentioned subject matters and features of the embodiments of the present application can be referred to each other, and those skilled in the art can flexibly combine technical features of different embodiments to form further embodiments when the structure allows.

The battery, the electric device, the method for preparing the battery and the equipment provided by the application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are merely provided to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.

Claims

1. A battery, comprising:

a battery cell (3), the battery cell (3) comprising a pressure relief mechanism (33), the pressure relief mechanism (33) being configured to actuate to relieve an internal pressure or temperature of the battery cell (3) when the internal pressure or temperature reaches a threshold value;

a fire fighting chamber (25) for containing a fire fighting medium, and the fire fighting chamber (25) is configured to discharge the fire fighting medium upon actuation of the pressure relief mechanism (33) such that the fire fighting medium enters the interior of the battery cell (3);

a collection chamber (24) for collecting emissions from the battery cell (3) when the pressure relief mechanism (33) is actuated, the collection chamber (24) being located on a side of the fire protection chamber (25) remote from the battery cell (3);

-an insulation member (22) for insulating the fire chamber (25) from the collection chamber (24);

wherein the isolation member (22) is configured to be traversed by the emissions upon actuation of the pressure relief mechanism (33) such that the emissions enter the collection chamber (24) via the fire protection chamber (25).

2. The battery of claim 1, wherein the isolation component (22) is configured to be damaged by the emissions upon actuation of the pressure relief mechanism (33) to cause the emissions to enter the collection cavity (24) via the fire protection cavity (25).

3. The battery according to claim 2, wherein the spacer member (22) is provided with a weak portion (221), the weak portion (221) being configured to be broken by the discharge when the pressure relief mechanism (33) is actuated.

4. The battery according to claim 1, wherein the separator (22) is provided with a through-hole (222), the through-hole (222) being configured to allow the exhaust to pass through the separator (22).

5. The battery according to claim 1, wherein the isolation component (22) is configured as a chamber wall common to the fire-fighting chamber (25) and the collection chamber (24).

6. The battery of claim 1, wherein the battery further comprises:

a case (1) for accommodating the battery cells (3);

the cover body (2) is connected with the box shell (1) to encapsulate the battery unit (3);

wherein the fire-fighting chamber (25), the collecting chamber (24) and the insulation part (22) are constructed as at least parts of the cover (2).

7. A battery according to claim 6, wherein the cover (2) is provided with a vent channel (26), the vent channel (26) being for directing the exhaust through the partition member (22) into the collection chamber (24).

8. The battery of claim 7, wherein the fire-fighting cavity (25) is configured to be damaged by the emissions as the emissions pass through the exhaust channel (26) to discharge the fire-fighting medium.

9. The battery according to claim 7, wherein the vent channel (26) is configured as a groove, an opening of which is disposed toward the pressure relief mechanism (33), the vent entering the vent channel (26) via the opening.

10. The battery according to claim 9, wherein the groove has a bottom wall (261) and a side wall (262) connected to the bottom wall (261), the bottom wall (261) being disposed opposite the pressure relief mechanism (33), the side wall (262) being disposed extending toward the pressure relief mechanism (33).

11. The battery according to claim 10, wherein the bottom wall (261) is configured as at least part of the insulation member (22) and the side wall (262) is configured as at least part of a cavity wall of the fire fighting cavity (25).

12. The battery of claim 1, wherein the fire-fighting cavity (25) is configured to be destroyed by the emissions upon actuation of the pressure relief mechanism (33) to release the fire-fighting medium.

13. The battery according to claim 1, wherein the fire fighting cavity (25) comprises a receiving recess (231) arranged opposite the pressure relief mechanism (33), the receiving recess (231) being formed by the fire fighting cavity (25) being recessed towards a cavity wall of the pressure relief mechanism (33) for flowing the fire fighting medium towards the receiving recess (231) upon actuation of the pressure relief mechanism (33).

14. The battery according to claim 13, wherein the receiving recesses (231) are provided in at least two, and adjacent two of the receiving recesses (231) communicate with each other.

15. The battery according to claim 1, wherein the battery further comprises a thermal management component for regulating the temperature of the battery cells (3), and the thermal management component is configured to communicate with the fire fighting cavity (25) for delivering the fire fighting medium to the fire fighting cavity (25).

16. An electrical device comprising a battery as claimed in any one of claims 1 to 15 for providing electrical energy.

17. A method of making a battery comprising:

providing a battery cell (3), the battery cell (3) comprising a pressure relief mechanism (33), the pressure relief mechanism (33) being configured to be actuated to relieve an internal pressure or temperature of the battery cell (3) when the internal pressure or temperature reaches a threshold value;

providing a fire fighting chamber (25), the fire fighting chamber (25) being for containing a fire fighting medium, and the fire fighting chamber (25) being configured to discharge the fire fighting medium upon actuation of the pressure relief mechanism (33) such that the fire fighting medium enters the interior of the battery cell (3);

-providing a collection chamber (24), said collection chamber (24) being intended to collect emissions from said battery cell (3) upon actuation of said pressure relief mechanism (33), and said collection chamber (24) being located on the side of said fire protection chamber (25) remote from said battery cell (3);

-providing an insulation member (22), said insulation member (22) being adapted to insulate said fire-fighting chamber (25) from said collecting chamber (24);

wherein the isolation member (22) is configured to be traversed by the emissions upon actuation of the pressure relief mechanism (33) to cause the emissions to enter the collection chamber (24) via the fire protection chamber (25).

18. An apparatus for preparing a battery, comprising:

a first device for providing a battery cell (3), the battery cell (3) comprising a pressure relief mechanism (33), the pressure relief mechanism (33) being adapted to be actuated to relieve an internal pressure or temperature of the battery cell (3) when the internal pressure or temperature reaches a threshold value;

a second device for providing a fire-fighting chamber (25), said fire-fighting chamber (25) being for containing a fire-fighting medium, and said fire-fighting chamber (25) being configured to discharge said fire-fighting medium upon actuation of said pressure relief mechanism (33) to allow said fire-fighting medium to enter the interior of said battery cell (3);

-a third device for providing a collection chamber (24), said collection chamber (24) being intended to collect the emissions coming from said battery cell (3) when said pressure relief mechanism (33) is activated, and said collection chamber (24) being located on the side of said fire protection chamber (25) remote from said battery cell (3);

-a fourth device for providing an insulation member (22), said insulation member (22) being adapted to insulate said fire-fighting chamber (25) from said collection chamber (24);

wherein the isolation member (22) provided by the fourth apparatus is configured to be traversed by the emissions upon actuation of the pressure relief mechanism (33) to cause the emissions to enter the collection chamber (24) via the fire fighting chamber (25).