CN112018302A

CN112018302A - Battery, electric device, method and equipment for preparing battery

Info

Publication number: CN112018302A
Application number: CN202011120233.7A
Authority: CN
Inventors: 梁成都; 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: 2020-12-01
Anticipated expiration: 2040-10-19
Also published as: CN112018302B

Abstract

The embodiment of the application provides a battery, an electric device, a method and equipment for preparing the battery. The battery includes: the battery cell comprises a pressure relief mechanism, wherein the pressure relief mechanism is used for actuating to release the internal pressure when the internal pressure or the temperature of the battery cell reaches a threshold value; a fire conduit for containing a fire-fighting medium, the fire conduit configured to expel the fire-fighting medium toward the battery cell upon actuation of the pressure relief mechanism; the accommodating part is used for accommodating the fire-fighting medium discharged from the fire-fighting pipeline so as to cool the battery monomer. According to the technical scheme of the embodiment of the application, the safety of the battery can be enhanced.

Description

Battery, electric device, method and equipment for preparing battery

Technical Field

The embodiments of the present application relate to the field of energy storage devices, and more particularly, to a battery, an electric device, a method and an apparatus for manufacturing the battery.

Background

Energy conservation and emission reduction are the key points of sustainable development of the automobile industry. Under such circumstances, electric vehicles are an important component of sustainable development of the automobile industry due to their energy saving and environmental protection advantages. In the case of electric vehicles, battery technology is an important factor in the development thereof.

In addition to improving the performance of batteries, safety issues are also a considerable problem in the development of battery technology. If the safety problem of the battery cannot be guaranteed, the battery cannot be used. Therefore, how to enhance the safety of the battery is a technical problem to be solved urgently in the battery technology.

Disclosure of Invention

The embodiment of the application provides a battery, an electric device, a method and equipment for preparing the battery, and the safety of the battery can be enhanced.

In a first aspect, a battery is provided, comprising: the battery cell comprises a pressure relief mechanism, wherein the pressure relief mechanism is used for actuating to release the internal pressure when the internal pressure or the temperature of the battery cell reaches a threshold value; a fire conduit for containing a fire-fighting medium, the fire conduit configured to expel the fire-fighting medium toward the battery cell upon actuation of the pressure relief mechanism; the accommodating part is used for accommodating the fire-fighting medium discharged from the fire-fighting pipeline so as to cool the battery monomer.

In this application embodiment, the battery includes the portion of holding that is used for holding the fire control medium, like this, when pressure release mechanism actuation and fire control pipeline discharge the fire control medium towards the battery monomer that takes place the thermal runaway, the fire control medium except can flow into the battery monomer that takes place the thermal runaway, a part of fire control medium can also be stored in the portion of holding, make the fire control medium of fire control pipeline discharge all can be utilized fully effectively, the problem that the fire control medium is wasted has been avoided, thereby can reduce the free temperature of battery rapidly, restrain the danger that the battery monomer unusual brought in the very first time, reduce the possibility of battery explosion, strengthen the security of battery. Further, if thermal runaway occurs in the battery cell at a later time, the fire-fighting medium stored in the accommodating part can also continue to cool down the battery cell in which the thermal runaway occurs, and the safety of the battery can be further increased.

In some embodiments, the pressure relief mechanism is disposed on a first wall of the battery cell, and the receptacle includes a first receptacle attached to a second wall of the battery cell, the second wall being perpendicular to the first wall, the first receptacle configured to collect the fire-fighting medium diffused from the first wall.

This technical scheme, when battery monomer takes place thermal runaway, in the battery monomer can be flowed into to the partly fire control medium of fire control pipeline exhaust, another part fire control medium that diffuses out from first wall can be collected in first accommodation portion for the fire control medium of being collected in first accommodation portion can continuously give the battery monomer cooling.

In some embodiments, the first receptacle includes a first plate, a second plate, and at least two baffles, the second plate intersecting the first plate, the first plate intersecting the second wall, the at least two baffles each intersecting the first plate and the second plate.

In some embodiments, the first plate is parallel to the first wall, the second plate is parallel to the second wall, and the at least two baffles are perpendicular to the first plate and the second plate.

In some embodiments, the first plate is a bottom plate of a case of the battery.

In some embodiments, the second plate is a side plate of a case of the battery or a beam of the case.

Above-mentioned technical scheme, first container portion can save the manufacturing cost of battery through the box, curb plate or the roof beam of multiplexing battery.

In some embodiments, two of the at least two baffles and the first plate, the second plate and the second walls of N of the battery cells are used to form a receiving space for receiving the fire fighting medium, the receiving space has an opening facing the first wall, and N is a positive integer.

In some embodiments, N is equal to 1, 2, or 3.

When N is greater than 1, the fire-fighting medium can cool down the battery monomer with thermal runaway, and can also cool down the battery monomer adjacent to the battery monomer, thereby playing the effect of blocking thermal diffusion.

In some embodiments, the at least two baffles are the same length in a first direction, the first direction being a direction perpendicular to the first wall.

In some embodiments, the first plate is in the same plane as a third wall of the battery cell, the third wall being parallel to the first wall.

The first plate and the third wall are located on the same plane, so that the accommodating space formed by the first accommodating part and the second wall can be maximized, and more fire-fighting medium can be reserved.

In some embodiments, the first plate is located between the first wall and a third wall of the battery cell, the third wall being parallel to the first wall.

In some embodiments, an end of the second plate proximate the third wall is flush with the third wall.

In some embodiments, the other baffles of the at least two baffles except for the two baffles located at both ends of the second plate are embedded between the adjacent two of the battery cells.

By embedding the baffle between the two adjacent battery cells, the connection stability of the first accommodating portion and the second wall can be improved.

In some embodiments, the first plate is attached to the second wall by a connector.

In some embodiments, the first receiving portion includes a connection plate extending in a first direction at an end of the first plate connected to the second wall, the connection plate being attached to the second wall by the connection member, the first direction being a direction perpendicular to the first wall.

Through setting up the connecting plate for first container portion has bigger connection area with the second wall, and then can increase joint strength and heat conduction area.

In some embodiments, the connector is a thermally conductive glue.

The connecting piece is made of heat-conducting glue, so that heat can be transferred to the battery monomer through the heat-conducting glue.

In some embodiments, the pressure relief mechanism is disposed on a first wall of the battery cell, the accommodating portion includes a second accommodating portion disposed on the first wall, the pressure relief mechanism is disposed on a bottom wall of the second accommodating portion, and the second accommodating portion is configured to collect the fire-fighting medium flowing into the battery cell when the pressure relief mechanism is activated.

Through set up the second portion of holding on the free first wall of battery, when battery monomer takes place thermal runaway, the fire control medium except can flowing into in the battery monomer, partly fire control medium can also stay in the second portion of holding for more fire control media can be used for the cooling to the battery monomer. Furthermore, when the flow of the fire-fighting medium is small, the fire-fighting medium can be stored in the second accommodating part more easily and then flows into the battery monomer, so that the battery monomer with thermal runaway can be cooled; when the flow of fire control medium is great, the fire control medium can also be stored in the second containing part except can cooling down the battery monomer that takes place thermal runaway the first moment, like this, the fire control medium also can cool down other battery monomers to can further strengthen the security of battery.

In some embodiments, the opening of the second accommodating portion faces the outside of the battery cell, and the area of the opening of the second accommodating portion is larger than the area of the region where the pressure relief mechanism is located.

In some embodiments, an area of the opening of the second receiving part is greater than or equal to an area of a surface of the bottom wall of the second receiving part facing the outside of the battery cell.

The larger the area of the opening of the second containing part is, the larger the area thereof for collecting the fire-fighting medium is, so that the efficiency of the second containing part for collecting the fire-fighting medium can be improved.

In some embodiments, the bottom wall of the second receiving portion has a uniform thickness.

In some embodiments, a surface of the bottom wall of the second receiving part facing the outside of the battery cell is an inclined surface inclined from the periphery to the center toward the inside of the second receiving part.

In some embodiments, a surface of the first wall near the interior of the battery cell includes a first region and a second region, the first region is a region corresponding to the second receiving portion, the second region is a region other than the first region on the surface of the first wall near the interior of the battery cell, and the first region and the second region are located on the same plane.

In some embodiments, a surface of the first wall close to the inside of the battery cell includes a first region and a second region, the first region is a region corresponding to the second accommodating portion, the second region is a region on the surface of the first wall close to the inside of the battery cell except the first region, and a plane where the first region is located is close to the inside of the battery cell compared with a plane where the second region is located.

In this way, the fire-fighting medium can flow better into the second receptacle.

In some embodiments, the bottom wall of the second receiving portion is provided with a partition rib that divides the bottom wall of the second receiving portion into at least two regions.

Through setting up the partition muscle, can increase the intensity of second container portion.

In some embodiments, the pressure relief mechanism is located in one of the at least two regions.

In some embodiments, a through hole is formed in a bottom wall of the second accommodating portion, and the pressure relief mechanism covers the through hole.

In some embodiments, the battery further comprises: and the protection sheet is used for protecting the pressure relief mechanism and is positioned towards the pressure relief mechanism, one side of the battery monomer outside covers the pressure relief mechanism.

Through setting up the screening glass, can block the foreign object and contact pressure relief mechanism, pressure when the foreign object can not influence pressure relief mechanism actuation like this to can protect pressure relief mechanism.

In some embodiments, a surface of the bottom wall of the second receiving portion facing the outside of the battery cell is provided with a protrusion extending toward the outside of the battery cell in a surrounding area of the pressure relief mechanism, and the protective sheet is fixed to the protrusion to cover the pressure relief mechanism. The protrusion may enhance the strength around the pressure relief mechanism.

In some embodiments, the protrusion protrudes to a height smaller than a depth of the second receiving part with respect to a surface of the bottom wall of the second receiving part facing the outside of the battery cell.

In some embodiments, the protective sheet covers the opening of the second receiving portion.

In a second aspect, there is provided an electrical device comprising: the battery of the first aspect.

In some embodiments, the powered device is a vehicle, a watercraft, or a spacecraft.

In a third aspect, a method for preparing a battery is provided, comprising: 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 conduit for containing a fire-fighting medium and configured to expel the fire-fighting medium toward the battery cell upon actuation of the pressure relief mechanism; and providing a containing part, wherein the containing part is used for containing the fire-fighting medium discharged from the fire-fighting pipeline so as to cool the battery cell.

In some embodiments, the accommodating portion includes a second accommodating portion disposed on the first wall, the pressure relief mechanism is disposed on a bottom wall of the second accommodating portion, and the second accommodating portion is configured to collect the fire fighting medium flowing into the battery cell when the pressure relief mechanism is actuated.

In a fourth aspect, there is provided an apparatus for preparing a battery, comprising means for performing the method of the third aspect described above.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to one embodiment of the present application;

FIG. 2 is a schematic diagram of a cell according to one embodiment of the present application;

fig. 3 is a schematic structural view of a battery module according to an embodiment of the present application;

fig. 4 is an exploded view of a battery cell according to an embodiment of the present application;

FIG. 5 is a schematic diagram of a cell according to one embodiment of the present application;

6-9 are schematic structural views of a first container portion according to some embodiments of the present application;

10-12 are cross-sectional views of batteries according to some embodiments of the present application;

fig. 13 and 14 are top views of batteries according to some embodiments of the present application;

fig. 15 and 16 are cross-sectional views of batteries according to some embodiments of the present application;

fig. 17 and 18 are schematic structural views of batteries according to some embodiments of the present application;

fig. 19 is a schematic flow chart of a method of manufacturing a battery according to an embodiment of the present application;

fig. 20 is a schematic block diagram of an apparatus for manufacturing a battery according to an embodiment of the present application.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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 in the present application 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 above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order.

Reference in the specification 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 specification. The appearances of the phrase 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.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "attached" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The term "and/or" in this application is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" in this application generally indicates that the former and latter related objects are in an "or" relationship.

The "plurality" in the present application means two or more (including two), and similarly, "plural" means two or more (including two) and "plural" means two or more (including two).

In the embodiment of the present application, the battery cell may include a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, which is not limited in the embodiment of the present application. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shapes, which is not limited in the embodiments of the present application. The battery cells are generally divided into three types in an encapsulation manner: the cylindrical battery monomer, the square battery monomer and the soft package battery monomer are not limited in the embodiment of the application.

Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charging or discharging of battery monomer.

The battery cell may include an electrode assembly composed of a positive electrode tab, a negative electrode tab, and a separator, and an electrolyte. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work. The positive plate comprises a positive current collector and a positive active substance layer, wherein the positive active substance layer is coated on the surface of the positive current collector, the current collector which is not coated with the positive active substance layer protrudes out of the current collector which is coated with the positive active substance layer, and the current collector which is not coated with the positive active substance layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate, or the like. The negative pole piece includes negative current collector and negative pole active substance layer, and the negative pole active substance layer coats in the surface of negative current collector, and the mass flow body protrusion in the mass flow body of coating the negative pole active substance layer of uncoated negative pole active substance layer, the mass flow body of uncoated negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be graphite, carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The material of the diaphragm can be PP or PE, etc. In addition, the electrode assembly may have a winding structure or a lamination structure, and the embodiment of the present application is not limited thereto.

The development of battery technology needs to consider various design factors, such as energy density, cycle life, discharge capacity, charge and discharge rate, and other performance parameters, and also needs to consider the safety of the battery.

For cells, the main safety hazard comes from the charging and discharging processes, and at the same time, with a suitable ambient temperature design, there are generally at least three protective measures for the cells in order to effectively avoid unnecessary losses. In particular, the protective measures comprise at least a switching element, selection of a suitable isolating membrane material and a pressure relief mechanism. The switching element is an element that can stop charging or discharging the battery when the temperature or resistance in the battery cell reaches a certain threshold value. The isolating membrane is used for isolating the positive plate and the negative plate, and can automatically dissolve away the micron-scale (even nano-scale) micropores attached to the isolating membrane when the temperature rises to a certain value, so that metal ions cannot pass through the isolating membrane, and the internal reaction of the battery monomer is stopped.

The pressure relief mechanism refers to an element or a component that is actuated to relieve the internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold may depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolyte and the separator in the battery cell. The pressure relief mechanism may take the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically employ a pressure-sensitive or temperature-sensitive element or configuration, that is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold value, the pressure relief mechanism performs an action or a weak structure provided in the pressure relief mechanism is broken, thereby forming an opening or a passage through which the internal pressure or temperature can be relieved.

As used herein, "activate" means that the pressure relief mechanism is activated or activated to a certain state, such that the internal pressure and temperature of the battery cell are relieved. The actions generated by the pressure relief mechanism may include, but are not limited to: at least a portion of the pressure relief mechanism ruptures, fractures, is torn or opened, or the like. When the pressure relief mechanism is actuated, high-temperature and high-pressure substances in the battery cells are discharged outwards from the actuated part as emissions. In this way, the cells can be vented under controlled pressure or temperature, thereby avoiding potentially more serious accidents.

Reference herein to emissions from the battery cell includes, but is 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 pressure relief mechanism on the battery cell has an important influence on the safety of the battery. For example, when short circuit, overcharge, etc. occur, thermal runaway may occur inside the battery cell, and pressure or temperature may suddenly rise, in which case the internal pressure and temperature may be released outwards by the actuation of the pressure release mechanism, so as to prevent explosion and fire of the battery cell.

In the current design scheme of the pressure relief mechanism, the high pressure and high heat inside the battery cell are mainly released, namely the emissions are discharged to the outside of the battery cell. The high-temperature, high-pressure effluent is vented in the direction of the cell-provided pressure relief mechanism, and may more specifically be vented in the direction of the area in which the pressure relief mechanism is actuated, and the force and destructive power of such effluent may be significant, and may even be sufficient to break through one or more structures in that direction, creating further safety concerns. In addition, high voltage and high heat inside the battery cell may be continuously generated after thermal runaway occurs inside the battery cell, resulting in continuous potential safety hazards.

In order to solve the problems, a fire fighting system can be arranged in the box body of the battery, and a fire fighting pipeline of the fire fighting system is arranged above the wall of the battery cell, which is provided with the pressure relief mechanism. When the pressure relief mechanism is actuated, the fire-fighting pipeline discharges fire-fighting media, so that the temperature of emissions discharged from the pressure relief mechanism can be reduced, and the dangerousness of the emissions is reduced. The fire-fighting medium can further flow into the battery monomer through the pressure relief mechanism after actuating to further cool down the battery monomer, strengthen the security of battery. For example, the fire fighting pipe may be damaged by the exhaust from the battery cell when the pressure relief mechanism is activated, so that the fire fighting medium in the fire fighting pipe is exhausted.

The fire fighting pipe in the embodiment of the present application is used for containing a fire fighting medium, where the fire fighting medium may be a fluid, which may be a liquid or a gas. Alternatively, the fire-fighting medium may be circulated for better temperature regulation. Alternatively, the fire-fighting medium may be water, a mixed liquid of water and glycol, or air, or the like, or the fire-fighting medium may be at least one of liquid nitrogen, liquid argon, and liquid carbon dioxide.

As one example, the battery may include a control system that may control the fire conduit to discharge the fire-fighting medium when the pressure relief mechanism is activated.

As another example, upon actuation of the pressure relief mechanism, the exhaust emissions within the battery cell may pass through and damage the fire conduit, causing the fire conduit to discharge the fire-fighting medium. The examples of the present application will be described with reference to the discharge passing through and damaging the fire fighting pipe, but the present application is not limited thereto.

In case the pressure relief mechanism does not damage the fire fighting pipeline, no substance can be contained in the fire fighting pipeline, and in case the pressure relief mechanism is actuated, so that the fire fighting medium is contained in the fire fighting pipeline, for example, the fire fighting medium can be controlled to enter the fire fighting pipeline through the switch valve. Alternatively, the fire fighting medium can be contained in the fire fighting pipeline all the time without the pressure relief structure being damaged.

The fire-fighting medium can also be used for regulating the temperature of the battery cells. The adjusting of the temperature means heating or cooling of the plurality of battery cells. In the case of cooling or temperature reduction of the battery cells, the fire fighting pipe is used for accommodating a cooling fluid to reduce the temperature of the plurality of battery cells, and in this case, the fire fighting pipe may also be referred to as a cooling component, a cooling system, a cooling pipe, or the like, and the fire fighting medium accommodated therein may also be referred to as a cooling medium or a cooling fluid, and more specifically, may be referred to as a cooling liquid or a cooling gas.

However, when the pressure relief mechanism is actuated due to thermal runaway occurring inside the battery cell, a part of the fire-fighting medium discharged from the fire-fighting pipeline may flow to the outside of the battery cell where the thermal runaway occurs, so that the fire-fighting medium cannot be fully utilized, and the problem that the battery cell where the thermal runaway occurs cannot be rapidly cooled may occur. In view of this, the present application provides a battery, which can solve the above problems.

The technical scheme described in the embodiment of the application is applicable to various devices using batteries, such as mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecrafts and the like, and the spacecrafts comprise airplanes, rockets, space shuttles, spacecrafts and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to be applied to the above-described devices, but may also be applied to all devices using batteries, and for brevity of description, the following embodiments are all described by taking an electric vehicle as an example.

For example, as shown in fig. 1, which is a schematic structural diagram of a vehicle 1 according to an embodiment of the present disclosure, the vehicle 1 may be a fuel-oil vehicle, a gas-fired vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 1 may be provided with a motor 40, a controller 30 and a battery 10, the controller 30 being configured to control the battery 10 to supply power to the motor 40. For example, the battery 10 may be provided at the bottom or the head or tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, for example, the battery 10 may be used as an operation power supply of the vehicle 1 for a circuit system of the vehicle 1, for example, for power demand for operation at the start, navigation, and running of the vehicle 1. In another embodiment of the present application, the battery 10 may be used not only as an operation power source of the vehicle 1 but also as a driving power source of the vehicle 1 instead of or in part of fuel or natural gas to provide driving power to the vehicle 1.

In order to meet different power requirements, the battery may include a plurality of battery cells, wherein the plurality of battery cells may be connected in series or in parallel or in series-parallel, and the series-parallel refers to a mixture of series connection and parallel connection. The battery may also be referred to as a battery pack. Alternatively, a plurality of battery cells may be connected in series or in parallel or in series-parallel to form a battery module, and a plurality of battery modules may be connected in series or in parallel or in series-parallel to form a battery. That is, a plurality of battery cells may directly constitute a battery, or a battery module may be first constituted and then a battery may be constituted.

For example, as shown in fig. 2, the battery 10 may include a plurality of battery cells 20 for a structural schematic diagram of the battery 10 according to an embodiment of the present disclosure. The battery 10 may further include a case (or called a cover), the inside of the case is a hollow structure, and the plurality of battery cells 10 are accommodated in the case. As shown in fig. 2, the case may comprise two parts, herein referred to as a first part 111 and a second part 112, respectively, the first part 111 and the second part 112 snap together. The shape of the first and

second portions

111 and 112 may be determined according to the shape of a combination of a plurality of battery cells 20, and the first and

second portions

111 and 112 may each have one opening. For example, each of the first portion 111 and the second portion 112 may be a hollow rectangular parallelepiped and only one surface of each may be an opening surface, the opening of the first portion 111 and the opening of the second portion 112 are oppositely disposed, and the first portion 111 and the second portion 112 are fastened to each other to form a box body having a closed chamber. Wherein the case may include a bottom plate 112a, side plates 112b, and beams. The plurality of battery cells 20 are connected in parallel or in series-parallel combination and then placed in a box formed by buckling the first part 111 and the second part 112.

Optionally, the battery 10 may also include other structures, which are not described in detail herein. For example, the battery 10 may further include a bus member for electrically connecting the plurality of battery cells 20, such as in parallel or in series-parallel. Specifically, the bus member may achieve electrical connection between the battery cells 20 by connecting electrode terminals of the battery cells 20. Further, the bus bar member may be fixed to the electrode terminals of the battery cells 20 by welding. The electric energy of the plurality of battery cells 20 can be further led out through the box body by the conductive mechanism. Alternatively, the conductive means may also belong to the bus bar member.

The number of the battery cells 20 may be set to any number according to different power requirements. A plurality of battery cells 20 may be connected in series, parallel, or series-parallel to achieve greater capacity or power. Since the number of the battery cells 20 included in each battery 10 may be large, the battery cells 20 may be arranged in groups for convenience of installation, each group of the battery cells 20 constituting a battery module. The number of the battery cells 20 included in the battery module is not limited and may be set as required. For example, fig. 3 is an example of a battery module. The battery may include a plurality of battery modules, which may be connected in series, parallel, or series-parallel. As shown in fig. 4, which is an exploded view of a battery cell according to an embodiment of the present disclosure, the battery cell 20 includes one or more electrode assemblies 22, a case 211, and a cap plate 212. The coordinate system shown in fig. 4 is the same as that in fig. 3. The housing 211 and cover 212 form a housing or battery compartment 21. The wall of the housing 211 and the cover plate 212 are referred to as the wall of the battery cell 20. The case 211 is determined according to the shape of one or more electrode assemblies 22 after being combined, for example, the case 211 may be a hollow rectangular parallelepiped or a square or a cylinder, and one of the faces of the case 211 has an opening so that one or more electrode assemblies 22 can be placed in the case 211. For example, when the housing 211 is a hollow rectangular parallelepiped or square, one of the planes of the housing 211 is an open plane, i.e., the plane has no wall body so that the housing 211 communicates inside and outside. When the housing 211 may be a hollow cylinder, the end surface of the housing 211 is an open surface, i.e., the end surface has no wall body so that the housing 211 is communicated with the inside and the outside. The cap plate 212 covers the opening and is connected with the case 211 to form a closed cavity in which the electrode assembly 22 is placed. The case 211 is filled with an electrolyte, such as an electrolytic solution.

The battery cell 20 may further include two electrode terminals 214, and the two electrode terminals 214 may be disposed on the cap plate 212. The cap plate 212 is generally in the shape of a flat plate, and two electrode terminals 214 are fixed to the flat plate surface of the cap plate 212, the two electrode terminals 214 being a positive electrode terminal 214a and a negative electrode terminal 214b, respectively. One connecting member 23, which may also be referred to as a current collecting member 23, is disposed at each of the electrode terminals 214, between the cap plate 212 and the electrode assembly 22, for electrically connecting the electrode assembly 22 and the electrode terminals 214.

As shown in fig. 4, each electrode assembly 22 has a first tab 221a and a second tab 222 a. The first tab 221a and the second tab 222a have opposite polarities. For example, when the first tab 221a is a positive electrode tab, the second tab 222a is a negative electrode tab. The first tab 221a of one or more electrode assemblies 22 is connected to one electrode terminal by one connecting member 23, and the second tab 212a of one or more electrode assemblies 22 is connected to the other electrode terminal by the other connecting member 23. For example, the positive electrode terminal 214a is connected to a positive electrode tab through one connecting member 23, and the negative electrode terminal 214b is connected to a negative electrode tab through the other connecting member 23.

In the battery cell 20, the electrode assembly 22 may be provided singly or in plurality according to actual use requirements, and as shown in fig. 4, 4 independent electrode assemblies 22 are provided in the battery cell 20.

The battery cell 20 may further include a pressure relief mechanism 213. The pressure relief mechanism 213 is actuated to relieve the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a threshold value.

The pressure relief mechanism 213 may be any of various possible pressure relief structures, which are not limited in the embodiments of the present application. For example, the pressure relief mechanism 213 may be a temperature-sensitive pressure relief mechanism configured to be able to melt when the internal temperature of the battery cell 20 provided with the pressure relief mechanism 213 reaches a threshold value; and/or, pressure relief mechanism 213 may be a pressure sensitive pressure relief mechanism configured to rupture when the internal air pressure of battery cell 20 in which pressure relief mechanism 213 is disposed reaches a threshold value.

Fig. 5 is a schematic diagram of a battery 10 according to an embodiment of the present application. As shown in fig. 5, the battery 10 may include a battery cell 20, a fire fighting pipe 12, and a receiving part 13.

Wherein, the battery cell 20 includes a pressure relief mechanism 213, and the pressure relief mechanism 213 is configured to be activated to relieve the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The fire fighting pipe 12 is used to contain a fire fighting medium, and the fire fighting pipe 12 is configured to discharge the fire fighting medium toward the battery cell 20 when the pressure relief mechanism 213 is actuated. The accommodating part 13 is used for accommodating the fire fighting medium discharged from the fire fighting pipe 12 to cool down the battery cell 20.

Therefore, in the embodiment of the present application, the battery 10 includes the accommodating portion 13 for accommodating the fire-fighting medium, so that when the pressure relief mechanism 213 is actuated and the fire-fighting pipe 12 discharges the fire-fighting medium toward the battery cell 20 in which the thermal runaway occurs, the fire-fighting medium may flow into the battery cell 20 in which the thermal runaway occurs, and a part of the fire-fighting medium may be stored in the accommodating portion 13, so that the fire-fighting medium discharged from the fire-fighting pipe 12 may be fully and effectively utilized, thereby avoiding the problem that the fire-fighting medium is wasted, and thus the temperature of the battery cell 20 may be rapidly reduced, the risk of the battery cell 20 being abnormal may be suppressed at the first time, the possibility of explosion of the battery 10 may be reduced, and the safety of the battery 10.

Further, if thermal runaway occurs in the battery cell at a later time, the fire-fighting medium stored in the accommodating part can also continue to cool down the battery cell in which the thermal runaway occurs, so that the safety of the battery can be further increased.

Alternatively, the fire fighting pipe 12 may continuously discharge the fire fighting medium toward the battery cell 20 when the pressure relief mechanism 213 is actuated, or the fire fighting pipe 12 may intermittently discharge the fire fighting medium toward the battery cell 20 when the pressure relief mechanism 213 is actuated.

The fire conduit 12 may be provided in any shape depending on the application. For example, the fire fighting pipe 12 may be provided as a flat pipe, or may be provided in other shapes such as a cylindrical pipe, a straight pipe, a U-shaped pipe, an S-shaped pipe, etc., in view of space efficiency and ease of installation.

Alternatively, after the pressure relief mechanism 213 is activated, the accommodating portion 13 may directly use the accommodated fire-fighting medium to cool the battery cell 20 in which thermal runaway occurs through the wall where the pressure relief mechanism is located; and/or, the accommodating part 13 may first allow the accommodated fire fighting medium to flow into the battery cell 20 in which the thermal runaway occurs, and then cool the battery cell 20 in which the thermal runaway occurs.

The battery 10 shown in fig. 5 may be the battery 10 of fig. 1 and 2, it should be noted that, in the embodiment of the present application, like reference numerals denote like components, and in different embodiments, detailed description of the like components is omitted for the sake of brevity. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the present application and the overall thickness, length, width and other dimensions of the integrated device shown in the drawings are only exemplary and should not constitute any limitation to the present application.

Alternatively, in an embodiment of the present application, the pressure relief mechanism 213 may be disposed on a first wall 21a of the battery cell 20, the accommodating portion 13 includes a first accommodating portion 131, the first accommodating portion 131 is attached to a second wall 21b of the battery cell 20, the second wall 21b is perpendicular to the first wall 21a, and the first accommodating portion 131 is used for collecting the fire-fighting medium diffused from the first wall 21 a.

When thermal runaway occurs in the battery cells 20, a portion of the fire fighting medium discharged from the fire fighting pipe 12 may flow into the battery cells 20, and another portion of the fire fighting medium diffused from the first wall 21a may be collected in the first receiving portion 131, so that the fire fighting medium collected in the first receiving portion 131 may continuously cool down the battery cells 20.

The first wall 21a may be any wall of the battery cell 20. As an example, as shown in fig. 5, the first wall 21a is an uppermost wall of the battery cell 20. The pressure relief mechanism 213 may be a part of the first wall 21a, or may be a separate structure from the first wall 21a and fixed to the first wall 21a by welding, for example. When the pressure relief mechanism 213 is a part of the first wall 21a, for example, the pressure relief mechanism 213 may be formed by providing a notch on the first wall 21 a. In the case where the first wall 21a is the uppermost wall of the battery cell 20, the second wall 21b is a side wall of the battery cell 20.

The first receiving portion 131 may include a first plate 133, a second plate 134, and at least two baffles 135, wherein the second plate 134 intersects the first plate 133, the first plate 133 intersects the second wall 21b, and each of the at least two baffles 135 intersects the first plate 133 and the second plate 134.

Wherein two baffles of the at least two baffles 135 together with the first plate 133, the second plate 134 and the second walls 21b of the N battery cells 20 may form an accommodation space for accommodating a fire-fighting medium, the accommodation space having an opening towards the first wall 21a, N being a positive integer.

The value of N is not limited in this application. Alternatively, N may be 1, 2 or 3.

As shown in fig. 6 and 7, when N is 1, that is, the second wall 21b of each battery cell 20 may form an accommodation space with two baffles of the at least two baffles 135, the first plate 133, and the second plate 134. At this time, the number of the baffles 135 may be one more than the number of the battery cells 20. When N is greater than 1, the plurality of battery cells 20 share one first receiving part 131. Taking fig. 8 and 9 as an example, the second walls 21b of the 2 battery cells 20 and the first accommodating portion 131 form an accommodating space. When a plurality of battery cells 20 share one first accommodating part 131, when one of the battery cells 20 is in thermal runaway, the fire fighting pipeline breaks at the region corresponding to the battery cell 20 to release a fire fighting medium, a part of the fire fighting medium flows into the battery cell 20 through the pressure relief mechanism 213, and the other part flows out from the first wall 21a and is stored in the first accommodating part 131, and the part of the fire fighting medium can cool the battery cell 20 in thermal runaway and can cool the battery cell 20 adjacent to the battery cell 20, so that the effect of blocking thermal diffusion can be further achieved.

The first receiving portion 131 may have any shape. For example, the first receiving portion 131 may have a rectangular shape as shown in fig. 6 to 9, a circular shape, a trapezoidal shape, or the like; for another example, the first receiving portion 131 may have an irregular shape. In addition, the first receiving portion 131 may be an integral structure.

When the first receiving part 131 has a rectangular shape as shown in fig. 6 to 9, the first plate 133 may be parallel to the first wall 21a, the second plate 134 may be parallel to the second wall 21b, i.e., the first plate 133 and the second plate 134 are perpendicular, and the at least two baffles 135 may be perpendicular to the first plate 133 and the second plate 134. That is, the first plate 133 may be a bottom plate of the first receiving portion 131, and the second plate 134 may be a side plate of the first receiving portion 131.

Alternatively, the second plate 134 may be the side plate 112b of the case of the battery 10 or may be a beam of the case of the battery 10.

Alternatively, the first plate 133 may be the bottom plate 112a of the case of the battery 10.

The first housing portion 131 multiplexes the cases of the batteries 10. Thus, the production cost of the battery can be saved.

Alternatively, the first plate 133 and/or the second plate 134 may be a plate newly added to the battery 10.

In the embodiment of the present application, the distance between the first plate 133 and the upper surface of the case of the battery 10 is not limited. As an example, the first plate 133 may be located in the same plane as the third wall 21c of the battery cell 20, wherein, referring to fig. 10, the third wall 21c is perpendicular to the second wall 21b, i.e., the third wall 21c is parallel to the first wall 21 a. In the above figures, the first plate 133 and the third wall 21c are located on the same plane, that is, the first plate 133 is in close contact with the upper surface of the case of the first housing 131 in fig. 6, 8, and 10. Note that, in fig. 6 to 9, one ends of the at least two baffles 135 close to the third wall 21c are located on the same plane as the third wall 21 c.

The first plate 133 is located on the same plane as the third wall 21c, so that the receiving space formed between the first receiving part 131 and the second wall 21b can be maximized, and thus more fire-fighting media can be received.

Alternatively, the first plate 133 may be positioned between the first wall 21a and the third wall 21 c. For example, as shown in fig. 7, 9 and 11.

At this time, in one embodiment of the present application, with continued reference to fig. 11, an end of the second plate 134 near the third wall 21c may be in the same plane as the third wall 21 c. Further, an end of each of the at least two baffles 135 near the third wall 21c may be located in the same plane as the third wall 21c, as shown in fig. 7 and 9. As such, the first receiving portion 131 may be more securely attached to the second wall 21 b. Alternatively, in another embodiment of the present application, an end of the second plate 134 adjacent to the third wall 21c may be located on the same plane as the first plate 133, and an end of each of the at least two baffles 135 adjacent to the third wall 21c may be located on the same plane as the first plate 133. At this time, the first receiving portion 131 is suspended.

In the case where the first plate 133 intersects the second wall 21b, as shown in fig. 12, the first plate 133 may be attached to the second wall 21b by a connecting member 23. The connecting member 23 may be, but is not limited to, a heat conductive adhesive, and the heat conductive adhesive may transfer heat to the battery cell 20.

Alternatively, in an embodiment of the present application, as shown with continued reference to fig. 10 and 11, the first receiving portion 131 may further include a connecting plate 136, the connecting plate 136 may extend in a first direction at an end of the first plate 133 connecting the second wall 21b, and the connecting plate 136 may be attached to the second wall 21b by the connecting member 23, wherein the first direction is a direction perpendicular to the first wall 21 a. In other words, one end of the first plate 133 connecting the second wall 21b may extend in the first direction, forming a connecting plate 136, which connecting plate 136 may be attached to the second wall 21b by the connecting member 23. By way of example, the connecting plate 136 may have the shape shown in fig. 10 and 11, or the connecting plate 136 may have other shapes, such as an H-shape, a U-shape, etc.

By providing the connection plate 136, a larger connection area between the first receiving portion 131 and the second wall 21b is enabled, so that the connection strength and the heat conduction area can be increased.

The first plate 133 may also be attached to the second wall 21b by a sealing material or welding. The sealing material may be a thermally conductive sealing material. It should be understood that the first plate 133 may be attached to the second wall 21b by other means, which is not limited by the embodiment of the present application. Similar to the attachment between the first plate 133 and the second wall 21b, the first plate 133, the second plate 134, and the at least two baffles 135 may be connected therebetween in the manner mentioned above.

Alternatively, in one embodiment of the present application, the other baffles 135b of the at least two baffles 135 may be embedded between the adjacent two battery cells 20. In addition to this, the other baffles 135b of the at least two baffles 135 may be attached to the adjacent two battery cells 20 by a connector. The other barrier 135b is inserted between the adjacent two battery cells 20, and the connection stability of the first receiving portion 131 and the second wall 21b can be improved.

In addition, two baffles 135a of the at least two baffles 135 may be attached to the second wall 21b by a connector or by welding or the like.

Alternatively, in an embodiment of the present application, the pressure relief mechanism 213 may be disposed on the first wall 21a of the battery cell, the accommodating portion 13 may further include a second accommodating portion 132 disposed on the first wall 21a, the pressure relief mechanism 213 is disposed on the bottom wall 132a of the second accommodating portion 132, and the second accommodating portion 132 is used for collecting the fire-fighting medium flowing into the battery cell 20 when the pressure relief mechanism 213 is activated.

By providing the second accommodating portion 132 on the first wall 21a of the battery cell 20, when thermal runaway occurs in the battery cell 20, in addition to the fire-fighting medium flowing into the battery cell 20, a part of the fire-fighting medium may remain in the second accommodating portion 132, so that more fire-fighting medium may be used for cooling the battery cell 20. Further, when the flow of the fire-fighting medium is small, the fire-fighting medium can be more easily left in the second accommodating part 132 and then flows into the battery cell 20, so that the battery cell 20 in thermal runaway can be cooled.

Wherein the second receiving portion 132 may be defined as a groove.

With continued reference to fig. 5, the first wall 21a may be the uppermost wall of the battery cell 20, and the second receiving portion 132 of the embodiment of the present application may be disposed on the upper surface of the battery cell 20.

Fig. 13 and 14 are top views of the battery 10 according to the embodiment of the present disclosure, as shown in fig. 13 and 14, alternatively, in an embodiment of the present disclosure, the opening of the second receiving portion 132 faces the outside of the battery cell 20, and the area of the opening of the second receiving portion 132 may be larger than the area of the region where the pressure relief mechanism 213 is located. The larger the area of the opening of the second receiving portion 132 is, the larger the area thereof to collect the fire-fighting medium is, so that the efficiency of the second receiving portion 132 to collect the fire-fighting medium can be improved. It is understood that the area of the opening of the second container 132 may be smaller than or equal to the area of the region where the pressure relief mechanism 213 is located.

In addition, in order that the fire extinguishing medium may better flow into the second receiving part 132, in one embodiment of the present application, the area of the opening of the second receiving part 132 may be greater than the area of the surface of the bottom wall 132a of the second receiving part 132 facing the outside of the battery cell 20. That is, the side wall of the second receiving portion 132 is gradually inclined downward from the periphery to the center, and the side wall of the second receiving portion 132 may be an inclined surface or a stepped surface. Of course, the area of the opening of the second receiving portion 132 may be smaller than or equal to the area of the surface of the bottom wall 132a of the second receiving portion 132 facing the outside of the battery cell 20.

In one embodiment of the present application, the thickness of the bottom wall 132a of the second receiving portion 132 may be uniform; alternatively, the surface of the bottom wall 132a of the second receiving portion 132 facing the outside of the battery cell 20 may be an inclined surface inclined toward the inside of the second receiving portion 132 from the periphery to the center. In short, the thickness of the bottom wall 132a of the second accommodating part 132 may gradually increase from the center of the bottom wall 132a of the second accommodating part 132 to the periphery; still alternatively, the bottom wall 132a of the second receiving portion 132 may be stepped from the periphery to the center toward the inside of the second receiving portion 132.

Alternatively, the bottom wall 132a of the second container 132 may be further provided with a through hole, and the pressure relief mechanism 213 covers the through hole. Wherein, the pressure relief mechanism can completely cover the through hole and can also partially cover the through hole.

Further, in one embodiment of the present application, the second container 132 may include a plurality of regions, and the pressure relief mechanism 213 is located in one of the plurality of regions. The areas of each of the plurality of regions may be the same or different, and this is not particularly limited in this embodiment of the present application. For example, as shown in fig. 14, the second container 132 includes 3 regions, wherein the area of the region where the pressure relief mechanism 213 is located is the largest, and the areas of the other two regions are the same.

In order to increase the strength of the second receiving part 132 in consideration of the fact that the second receiving part 132 may be thin, the bottom wall 132a of the second receiving part 132 may be provided with a partition rib 1321, and the partition rib 1321 may divide the bottom wall 132a of the second receiving part 132 into a plurality of regions. The number of the partition ribs 1321 in the embodiment of the present application is not particularly limited, and for example, the number of the partition ribs 1321 in fig. 14 is 2. By providing the dividing ribs 1321, the strength of the second housing portion 132 can be increased.

Alternatively, in one embodiment of the present application, the surface of the first wall 21a near the inside of the battery cell 20 may include a first region 32a and a second region 32b, the first region 32a being a region corresponding to the second receiving portion 132, the second region 32b being a region other than the first region 32a on the surface of the first wall 21a near the inside of the battery cell 20. As an example, as shown in fig. 15, the first region 32a may be located on the same plane as the second region 32 b.

Alternatively, as shown in fig. 16, the upper side in fig. 16 corresponds to the outside of the battery cell 20, and the lower side corresponds to the inside of the battery cell 20, and the first region 32a may be located on a plane closer to the inside of the battery cell 20 than the second region 32 b. In this way, the fire-fighting medium can flow into the second accommodation portion 132 better.

During the production process of the battery cell 20, the surface of the pressure relief structure 213 is often contaminated by the electrolyte or other foreign matters, and during the processing of the battery cell 20, the pressure relief mechanism 213 may be touched by an error operation, which may cause scratches on the surface of the pressure relief mechanism 213 or rupture of the pressure relief mechanism 213, which may affect the actuation effect of the pressure relief mechanism 213, thereby affecting the safety of the battery cell 20. In order to improve the safety performance of the battery cell 20, optionally, in an embodiment of the present application, as shown in fig. 17, the battery 10 may further include: and a protective sheet 24, wherein the protective sheet 24 is disposed on one side of the pressure relief mechanism 213 facing the outside of the battery cell 20 and covers the pressure relief mechanism 213. The material of the protective sheet 24 may be, but is not limited to, polyethylene terephthalate (PET), polypropylene (PP), Polycarbonate (PC), and the like.

By arranging the protection sheet 24, the foreign matter can be prevented from contacting the pressure relief mechanism 213, so that the foreign matter does not affect the pressure when the pressure relief mechanism 213 is actuated, the pressure relief mechanism 213 can be protected, and the safety of the single battery 20 is improved.

When the protective sheet 24 covers the pressure relief mechanism 213, the protective sheet 24 may also cover the second accommodation portion 132. Illustratively, the protective sheet 24 may partially cover the opening of the second receiving portion 132, or may entirely cover the opening of the second receiving portion 132 as shown in fig. 18.

In order to increase the strength around the pressure relief mechanism 213, as shown in fig. 15 and 16, the surface of the bottom wall 132a of the second container 132 facing the outside of the battery cell 20 may be further provided with a protrusion 142 extending toward the outside of the battery cell 20 in a surrounding area of the pressure relief mechanism 213. In the case where the protrusion 142 is provided, the protective sheet 24 may be fixed on the protrusion 142 to cover the pressure relief mechanism 213.

Alternatively, the protrusion 142 may protrude to a height smaller than the depth of the second receiving part 132 with respect to the surface of the bottom wall 132a of the second receiving part 132 facing the outside of the battery cell 20.

An embodiment of the present application also provides an electric device, which may include the battery 10 in the foregoing embodiments. Alternatively, the electric device may be a vehicle 1, a ship, or a spacecraft.

The battery and the electric device according to the embodiments of the present application are described above, and the method and the device for manufacturing the battery according to the embodiments of the present application will be described below, wherein portions not described in detail may be referred to the foregoing embodiments.

Fig. 19 shows a schematic flow diagram of a method 200 of preparing a battery according to one embodiment of the present application. As shown in fig. 19, the method 200 may include:

210, providing a battery cell 20, wherein the battery cell 20 comprises a pressure relief mechanism 213, and the pressure relief mechanism 213 is configured to be actuated to relieve internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value;

220 providing a fire fighting pipe 12, the fire fighting pipe 12 being for containing a fire fighting medium, and the fire fighting pipe 12 being configured to discharge the fire fighting medium towards the battery cell 20 upon actuation of the pressure relief mechanism 213;

and 230, providing a containing part 13, wherein the containing part 13 is used for containing the fire fighting medium discharged from the fire fighting pipeline 12 so as to cool the battery cell 20.

Fig. 20 shows a schematic block diagram of an apparatus 300 for preparing a battery according to an embodiment of the present application. As shown in fig. 20, the apparatus 300 for preparing a battery may include: a module 310 is provided.

The providing module 310 may be configured to: providing a battery cell 20, the battery cell 20 comprising a pressure relief mechanism 213, the pressure relief mechanism 213 being configured to be actuated to relieve an internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value; providing a fire conduit 12, the fire conduit 12 for containing a fire-fighting medium, and the fire conduit 12 being configured to discharge the fire-fighting medium towards the battery cell 20 upon actuation of the pressure relief mechanism 213; a receiving portion 13 is provided, and the receiving portion 13 is used for receiving the fire-fighting medium discharged from the fire fighting pipe 12 to cool down the battery cell 20.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced, but the modifications or the replacements do not cause the essence of the corresponding technical solutions to depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, comprising:

a battery cell (20) comprising a pressure relief mechanism (213), the pressure relief mechanism (213) being configured to actuate to relieve an internal pressure or temperature of the battery cell (20) when the internal pressure or temperature reaches a threshold value;

a fire conduit (12) for containing a fire-fighting medium, and the fire conduit (12) is configured to discharge the fire-fighting medium towards the battery cell (20) upon actuation of the pressure relief mechanism (213);

a receiving part (13) for receiving the fire-fighting medium discharged from the fire-fighting pipe (12) to cool the battery cell (20).

2. The battery according to claim 1, wherein the pressure relief mechanism (213) is disposed at a first wall (21 a) of the battery cell (20), the receptacle (13) comprises a first receptacle (131), the first receptacle (131) is attached to a second wall (21 b) of the battery cell (20), the second wall (21 b) is perpendicular to the first wall (21 a), and the first receptacle (131) is used for collecting the fire-fighting medium diffused from the first wall (21 a).

3. The battery according to claim 2, wherein the first receiving portion (131) comprises a first plate (133), a second plate (134) and at least two baffles (135), the second plate (134) and the first plate (133) intersect, the first plate (133) intersects the second wall (21 b), the at least two baffles (135) each intersect the first plate (133) and the second plate (134), two baffles of the at least two baffles (135) intersect the first plate (133), the second plate (134) and the second walls (21 b) of the N battery cells (20) for forming a receiving space for receiving the fire-fighting medium, the receiving space having an opening toward the first wall (21 a), N being a positive integer.

4. The cell according to claim 3, characterized in that said first plate (133) is parallel to said first wall (21 a), said second plate (134) is parallel to said second wall (21 b), said at least two baffles (135) being perpendicular to said first plate (133) and to said second plate (134).

5. The cell according to claim 3 or 4, characterized in that said at least two baffles (135) have the same length in a first direction, said first direction being a direction perpendicular to said first wall (21 a).

6. The battery according to claim 3 or 4, characterized in that the first plate (133) is located in the same plane as the third wall (21 c) of the battery cell (20); or

The first plate (133) is located between the first wall (21 a) and a third wall (21 c) of the battery cell (20), the third wall (21 c) being parallel to the first wall (21 a).

7. The battery according to claim 3 or 4, wherein the other baffles (135 b) of the at least two baffles (135) except for the two baffles (135 a) located at both ends of the second plate (134) are embedded between the adjacent two battery cells (20).

8. The battery according to claim 3 or 4, characterized in that the first plate (133) is attached to the second wall (21 b) by a connection (23).

9. The battery according to claim 8, wherein the first receiving portion (131) includes a connecting plate (136), the connecting plate (136) extending in a first direction at an end of the first plate (133) connecting the second wall (21 b), the connecting plate (136) being attached to the second wall (21 b) by the connecting member (23), the first direction being a direction perpendicular to the first wall (21 a), the connecting member (23) being a thermally conductive adhesive.

10. The battery according to any one of claims 1 to 4, wherein the pressure relief mechanism (213) is disposed on a first wall (21 a) of the battery cell (20), the receptacle (13) comprises a second receptacle (132) disposed on the first wall (21 a), the pressure relief mechanism (213) is disposed on a bottom wall 132a of the second receptacle (132), and the second receptacle (132) is configured to collect the fire-fighting medium flowing into the battery cell (20) when the pressure relief mechanism (213) is actuated.

11. The battery according to claim 10, wherein the opening of the second accommodating part (132) faces the outside of the battery cell (20), and the area of the opening of the second accommodating part (132) is larger than that of the region where the pressure relief mechanism (213) is located; and/or

The area of the opening of the second housing part (132) is greater than or equal to the area of the surface of the bottom wall (132 a) of the second housing part (132) facing the outside of the battery cell (20).

12. The battery according to claim 10, wherein the bottom wall (132 a) of the second container (132) is provided with a partitioning rib (1321), the partitioning rib (1321) partitioning the bottom wall (132 a) of the second container (132) into at least two regions, the pressure relief mechanism (213) being located in one of the at least two regions.

13. An electric device, comprising: the battery according to any one of claims 1 to 12.

14. A method of making a battery, comprising:

providing a battery cell (20), the battery cell (20) comprising a pressure relief mechanism (213), the pressure relief mechanism (213) being configured to be actuated to relieve an internal pressure or temperature of the battery cell (20) when the internal pressure or temperature reaches a threshold value;

providing a fire fighting pipe (12), the fire fighting pipe (12) being for containing a fire fighting medium, and the fire fighting pipe (12) being configured to discharge the fire fighting medium towards the battery cell (20) upon actuation of the pressure relief mechanism (213);

a receiving part (13) is provided, wherein the receiving part (13) is used for receiving the fire-fighting medium discharged from the fire-fighting pipeline (12) so as to cool the battery unit (20).

15. An apparatus for manufacturing a battery, comprising:

providing a module for: