CN115863901A

CN115863901A - Isolation component, battery and electric equipment

Info

Publication number: CN115863901A
Application number: CN202310182853.0A
Authority: CN
Inventors: 全超; 蒲玉杰; 李耀; 陈小波
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-03-01
Filing date: 2023-03-01
Publication date: 2023-03-28
Anticipated expiration: 2043-03-01
Also published as: CN115863901B

Abstract

The application discloses isolation component, battery and consumer belongs to the battery field. The isolation component comprises a first plate body and a second plate body, and the first plate body is provided with a first through hole. The second plate body and the first plate body are arranged in a stacked mode, the second plate body and the first plate body jointly form a cavity, the cavity is communicated with the first through hole, and the part, forming the cavity, of the second plate body is provided with an explosion-proof area used for hot gas burst. Use isolation parts to be applied to the battery as the example, in the battery, when battery monomer takes place thermal runaway, pressure relief mechanism opens, and the free emission of battery gets into the cavity from first through-hole, and the cavity provides buffer space for the emission, is broken for the explosion-proof area and provides sufficient time to reduce the risk that battery monomer and the interface of first plate body are destroyed, and, reduced the risk that the battery explodes, improved the reliability of battery.

Description

Isolation component, battery and electric equipment

Technical Field

The application relates to the field of batteries, in particular to an isolation component, a battery and electric equipment.

Background

Batteries are widely used in electronic devices such as mobile phones, notebook computers, battery cars, electric automobiles, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, electric tools, and the like.

In addition to improving the performance of batteries, reliability of batteries in use is also a concern in the development of battery technology.

Therefore, how to improve the reliability of the battery is an urgent problem to be solved in the battery technology.

Disclosure of Invention

In view of the above, the present application provides a separator, a battery, and an electric device, which can improve the reliability of the battery in use.

In a first aspect, the application provides an isolation component, which comprises a first plate body and a second plate body, wherein a first through hole is formed in the first plate body. The second plate body and the first plate body are arranged in a stacked mode, a cavity is formed by the second plate body and the first plate body together, the cavity is communicated with the first through hole, and the portion, forming the cavity, of the second plate body is provided with an explosion-proof area for hot gas to burst.

Among the technical scheme of this application embodiment, the common vacuole formation of second plate body and first plate body, steam can be by first through-hole entering cavity and break through the explosion-proof area of cavity and the isolation component of discharging. The inner space of the cavity can provide a certain buffer space for hot gas which enters the cavity in advance, and sufficient time is provided for the hot gas to burst the explosion-proof area. Use isolation part to be applied to the battery as the example, in the battery, battery monomer sets up the surface at first plate body, battery monomer's pressure relief mechanism sets up with first through-hole relatively, when battery monomer takes place thermal runaway, pressure relief mechanism opens, battery monomer's emission gets into the cavity from first through-hole, the cavity provides buffer space for the emission, it provides sufficient time to be broken for the explosion-proof zone, thereby reduce the risk that battery monomer and first plate body's interface is destroyed, and, the risk that the battery takes place the explosion has been reduced, the reliability of battery has been improved.

In some embodiments, the melting point of the blast resistant zone is T, satisfying: t is less than or equal to 800 ℃. The melting point of the explosion-proof area is designed within a reasonable range, and by taking the case that the isolating component is applied to the battery as an example, the risk of explosion of the battery caused by overhigh melting point of the explosion-proof area, overlarge difficulty of hot gas for breaking the explosion-proof area and overlong time for breaking the explosion-proof area can be reduced.

In some embodiments, the thickness of the blast-proof area is D, satisfying: d is more than 0mm and less than or equal to 2mm. The thickness of the explosion-proof area is designed in a reasonable range, and taking the application of the isolating component to the battery as an example, on one hand, the risk of explosion of the battery caused by overhigh thickness of the explosion-proof area, overlarge difficulty of hot gas for breaking the explosion-proof area and overlong time for breaking the explosion-proof area can be reduced; on the other hand, the risk that the thickness of the explosion-proof area is zero, which causes the sealing failure of the isolation component, can be reduced.

In some embodiments, at least a portion of the blast protected area is directly opposite the first through hole.

In some embodiments, the explosion-proof area is integral with the wall of the second plate that forms the cavity. Such design, blast resistant area's formation can adopt multiple mode, under some circumstances, compares in the thickness attenuate of the part with the wall of the vacuole formation of second plate body, with the holistic thickness attenuate of wall of the vacuole formation of second plate body in order to form blast resistant area, has the advantage that the processing degree of difficulty is low. In other cases, compared with the embodiment that the second plate body needs to be assembled and formed in a welding mode and the like because the material of the explosion-proof area is different from the material of the non-explosion-proof area of the second plate body, the method has the advantages of low processing difficulty and low processing cost by selecting a material with a lower melting point as the integral material of the wall surface of the second plate body forming the cavity.

In some embodiments, there are at least two first through holes, at least one cavity, each cavity in communication with a plurality of first through holes. Compare in every cavity and the embodiment of first through-hole one-to-one, every cavity all communicates with a plurality of first through-holes, can provide bigger buffer space to the steam that gets into isolation parts from different first through-holes to the isolation parts is used for adjusting the free temperature of battery's embodiment for the example, further reduces the free and damaged risk of first plate body's of battery interface, has reduced the risk that the battery explodes, has improved the reliability of battery.

In some embodiments, the minimum distance between adjacent first through holes is W, and satisfies 5mm ≦ W ≦ 30mm. The minimum distance between the adjacent first through holes is designed within a reasonable range, so that on one hand, the risk that the contact area between the first plate body and the single battery is too small due to the fact that the minimum distance between the adjacent first through holes is too small, and the heat dissipation effect of the isolation component is poor can be reduced; on the other hand, the risk that hot air is not smoothly exhausted due to the fact that the minimum distance between the adjacent first through holes is too large and the number of inlets of the hot air entering the cavity from the first through holes is reduced can be reduced.

In some embodiments, the area of the cavity is larger than the area of the first through hole, as viewed in the stacking direction of the first plate body and the second plate body. Compare in the exhaust area of first through-hole, the area of cavity is bigger, provides certain buffer space for passing the steam that first through-hole got into the cavity in advance.

In some embodiments, the cavity has a dimension H in the stacking direction of the first plate body and the second plate body, satisfying: h is more than or equal to 5mm and less than or equal to 40mm. The size of the cavity in the stacking direction of the first plate body and the second plate body is designed within a reasonable range, taking an isolating component applied to a battery as an example, in the battery, a single battery is arranged on the surface of the first plate body, a pressure relief mechanism of the single battery is arranged opposite to the first through hole, and a closed space is formed between the single battery and the cavity; on the other hand, the risk that the separator interferes with other components (e.g., a floor panel) in the battery due to the cavity having an excessively large size in the stacking direction of the first plate and the second plate can be reduced.

In some embodiments, a side of the second plate body facing the first plate body is provided with a first groove, and the first plate body covers the first groove to form a cavity. Under some circumstances, the accessible sets up the mode vacuole formation that the second plate body is connected with first plate body again behind the one side towards first plate body at the second plate body earlier, and the processing degree of difficulty and the assembly degree of difficulty are lower.

In some embodiments, a flow channel for accommodating a heat exchange medium is formed between the first plate body and the second plate body, and the cavity and the flow channel are independent of each other. The heat dissipation effect of the isolation component can be improved by arranging the flow channel used for containing the heat exchange medium between the first plate body and the second plate body.

In some embodiments, a side of the second plate body facing the first plate body is provided with a second groove, and the first plate body covers the second groove to form a flow passage. In some cases, the runner can be formed by arranging the second groove on one side of the second plate body facing the first plate body and then connecting the second plate body with the first plate body, so that the processing difficulty and the assembly difficulty are low.

In some embodiments, the second plate is fixedly connected to the first plate.

In a second aspect, the present application provides a battery comprising a plurality of battery cells and the separator of the above embodiments, the battery cells comprising a pressure relief mechanism. The isolation component is connected with the plurality of battery monomers in a heat conduction mode so as to adjust the temperature of the plurality of battery monomers. Wherein, first plate body is located between a plurality of battery monomer and the second plate body, and pressure release mechanism sets up with first through-hole relatively.

In some embodiments, each first through hole corresponds to one battery cell, or each first through hole corresponds to a plurality of battery cells. Due to the design, multiple possibilities are provided for the matching mode of the first through hole and the battery cell, and the compatibility of the isolation component and the first through hole is improved.

In some embodiments, the battery further includes a box body, the isolation component is disposed in the box body and divides an inner space of the box body into an electrical cavity and a collection cavity, the electrical cavity is used for accommodating the plurality of battery cells, and the collection cavity is used for collecting emissions of the battery cells when the pressure relief mechanism is actuated. The explosion-proof region is configured to be destroyed upon actuation of the pressure relief mechanism such that the cell effluent passes through the explosion-proof region and into the collection chamber. Utilize isolation part will hold the free electric chamber of battery and collect the chamber separation of emission, when pressure release mechanism actuates, the free emission of battery gets into after the buffering of cavity and collects the chamber, and does not get into or get into electric chamber a small amount to can not influence the electricity connection in the electric chamber, consequently can improve the reliability of battery.

In some embodiments, the battery further comprises an inductive alarm device disposed within the housing for emitting an alarm signal upon detection of a concentration of the emissions greater than a threshold value. The induction alarm device sends out an alarm signal when detecting that the concentration of the emissions is greater than a threshold value, so that a user can be reminded of intervening the battery in time, and the risk of safety accidents caused by explosion of the battery can be reduced to a certain extent.

In some embodiments, the sensing alarm device is disposed in the electrical cavity, the first plate body is further provided with a second through hole, the second through hole is communicated with the cavity, and the plurality of battery cells do not cover the second through hole. When the pressure relief mechanism is actuated, most of the discharged materials of the battery monomer enter the collection cavity after being buffered by the cavity, and a small part of the discharged materials pass through the second through hole to trigger the induction alarm device, so that the timeliness of the induction alarm device for sending an alarm signal can be improved.

In a third aspect, the present application provides a powered device, which includes the battery in the above embodiments, and the battery is used for providing electric energy.

The foregoing description is only an overview of the technical solutions of the present application, and the following detailed description of the present application is given to make the technical means of the present application more clearly understood and to make other objects, features, and advantages of the present application more obvious and understandable.

Drawings

Various additional advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Moreover, like reference numerals are used to refer to like elements throughout. In the drawings:

FIG. 1 is a schematic illustration of a vehicle according to some embodiments of the present application;

FIG. 2 is a schematic diagram of a cell according to some embodiments of the present application;

FIG. 3 is a schematic structural view of a housing according to some embodiments of the present application;

FIG. 4 is an exploded view of an isolation member according to some embodiments of the present application;

FIG. 5 is a schematic structural view of an isolation component according to some embodiments of the present application;

FIG. 6 is an enlarged view of a portion of the present application at A in FIG. 5;

FIG. 7 is a schematic structural view of an isolation member according to further embodiments of the present application;

FIG. 8 is a schematic view of a spacer member according to further embodiments of the present application;

FIG. 9 is an enlarged view of a portion of this application at B in FIG. 8;

FIG. 10 is a schematic diagram of a cell according to further embodiments of the present application;

FIG. 11 is an enlarged view of a portion of the present application at C of FIG. 10;

fig. 12 is a schematic view of a first plate according to some embodiments of the present application;

fig. 13 is a schematic structural diagram of a first plate according to still other embodiments of the present application.

The reference numbers in the detailed description are as follows:

1-a vehicle; 30-a controller; 20-a motor; 10-a battery; 11-a box body; 111-a first part; 11 a-an electrical cavity; 11 b-a collection chamber; 112-a second portion; 12-a battery cell; 121-a pressure relief mechanism; 13-a spacer member; 131-a first plate body; 1311 — a first via; 1312-a second via; 132-a second plate body; 1321-explosion-proof zone; 1322-a first groove; 1323-a second recess; 133-a cavity; 134-flow channel; 14-sensing alarm device.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are merely used to more clearly illustrate the technical solutions of the present application, and therefore are only examples, and the protection scope of the present application is not limited thereby.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "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.

In the description of the embodiments of the present application, the technical terms "first", "second", and the like are used only for distinguishing different objects, and are not to be construed as indicating or implying relative importance or implicitly indicating the number, specific order, or primary-secondary relationship of the technical features indicated. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

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 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 embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural pieces" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the directions or positional relationships indicated in the drawings, and are only for convenience of description of the embodiments of the present application and for simplicity of description, but do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, may be fixedly connected, detachably connected, or integrated; mechanical connection or electrical connection is also possible; either directly or indirectly through intervening media, either internally or in any other relationship. 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 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 embodiments 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. Batteries generally include a case for enclosing one or more battery cells. The box can avoid liquid or other foreign matters to influence the charge or discharge of battery cells.

The battery monomer comprises an electrode assembly and electrolyte, wherein the electrode assembly comprises a positive plate, a negative plate and an isolating membrane. The battery cell mainly depends on metal ions moving between the positive plate and the negative plate to work.

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 reliability of the battery during use.

For the cells, the main safety hazard arises from the charging and discharging process, while for the cells, the main safety hazard arises from the charging and discharging process, and at the same time, the appropriate ambient temperature design, in order to effectively avoid unnecessary losses, there are generally at least three protective measures for the cells. In particular, the protective measures comprise at least a switching element, selection of a suitable isolating membrane material and a pressure relief mechanism.

The pressure relief mechanism refers to an element or a component that is actuated to relieve internal pressure or temperature of the battery cell when the internal pressure or temperature or other conditions reach 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 or other conditions reach a predetermined threshold, 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 channel through which the internal pressure or temperature can be relieved.

The term "activate" as used herein means that the pressure relief mechanism is activated or activated to a certain state, so that the internal pressure and temperature of the battery cell are released, and thus the internal pressure and temperature of the battery cell are released. 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, melts, 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 battery cells can be decompressed and warmed under the condition of controllable pressure or temperature, so that the potential more serious accidents are avoided.

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 battery cell can be subjected to pressure relief and temperature relief under the condition of controllable pressure or temperature, so that the potential more serious accident is avoided.

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.

In order to improve the operational reliability and stability of the battery, an isolation component is usually disposed in the case. The insulation member typically includes a temperature adjustment plate, which is typically located at the bottom of the tank and is fixedly mounted to a side wall of the tank. The battery monomer is generally connected with the upper surface of the temperature adjusting plate through the heat conducting glue and/or is fixed on the temperature adjusting plate through fasteners such as bolts and the like, so that the battery monomer is contacted with the temperature adjusting plate, and the temperature of the battery monomer contacted with the temperature adjusting plate is changed along with the temperature change of the temperature adjusting plate.

The separator is a member for regulating the temperature of the plurality of battery cells. Generally, the separator has a fluid therein for regulating the temperature of the plurality of battery cells, wherein the fluid may be a liquid or a gas, and regulating the temperature means heating or dissipating heat from the plurality of battery cells. In the case of heat dissipation or temperature reduction of the battery cell, the separation member may be referred to as a cooling member, a cooling system, a cooling plate, or the like, and the fluid contained 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. In addition, the separation member may also be used for heating to raise the temperature of the plurality of battery cells, which is not limited in the embodiment of the present application. Alternatively, the fluid may be circulated to achieve better temperature regulation. Optionally, the fluid may be water, a mixture of water and glycol, air, or the like.

The pressure relief mechanism may be disposed at the bottom of the battery cell, at the side of the battery cell, or the like. Taking a battery with a pressure relief mechanism disposed at the bottom of a battery cell as an example, in order to ensure that the pressure relief mechanism can normally turn over to open for pressure relief when actuated, an avoidance cavity is generally disposed in a lower region of the battery. Considering that the isolation component is generally positioned at the bottom of the box body, a designer integrates the avoidance cavity corresponding to the battery cell on the isolation component.

Taking an example that the isolation component is applied to a battery, a common avoidance cavity is integrated on the isolation component, and the avoidance cavity mainly includes the following two conditions, wherein one of the two conditions is that a plurality of through holes corresponding to pressure relief mechanisms of single batteries one to one are formed in a cooling plate, a lower plate capable of covering the through holes is attached below the cooling plate so as to ensure the sealing performance of a box body, an avoidance cavity is formed in an independent space enclosed by the through holes and the lower plate, and a closed space is generally formed between the single batteries and the avoidance cavity. In this case, although the contact area between the battery cell and the cooling plate is large and the heat dissipation performance is good, the space of the escape cavity is small. For the battery monomer with low energy density or low charge state, when the pressure relief mechanism is actuated, the instantaneous temperature of the emission of the battery monomer or the instantaneous impact force of the emission cannot instantaneously break the lower plate body, and high-temperature gas in the emission cannot be discharged in time after the emission chamber is filled with the high-temperature gas. Under the condition that high-temperature gas continuously enters the avoidance cavity, the pressure in the avoidance cavity is gradually increased, and excessive pressure can burst the connection interface of the single battery and the cooling plate, so that the connection failure of the single battery and the cooling plate is caused, or more and more high-temperature gas which cannot be discharged outwards is accumulated in the single battery, so that the top cover of the single battery is exploded, and the reliability of the single battery in the using process is poor.

In another case, a strip-shaped hole corresponding to the pressure relief mechanism of all the battery cells is formed in the cooling plate, and a lower plate body capable of covering the strip-shaped hole is attached to the lower portion of the cooling plate, so that the sealing performance of the box body is guaranteed. The independent space enclosed by the strip-shaped hole and the lower plate body forms an avoiding cavity. In this case, although the space of the avoidance cavity is large, the avoidance cavity has a good buffering effect on the emissions, the contact area between the single battery and the cooling plate is small, the cooling plate has a poor heat dissipation or heating effect on the single battery, and the reliability of the battery is poor when the battery is used in a high-temperature or cold environment.

In view of this, the present application provides an isolation component, which includes a first plate and a second plate, wherein the first plate has a first through hole. The second plate body is fixedly connected to the first plate body, the second plate body and the first plate body are arranged in a stacked mode, the second plate body and the first plate body jointly form a cavity, the cavity is communicated with the first through hole, and the portion, forming the cavity, of the second plate body is provided with an explosion-proof area for hot air to burst. The second plate body and the first plate body jointly form a cavity, and hot gas can enter the cavity from the first through hole and burst an explosion-proof area of the cavity to be discharged out of the isolation part. The inner space of the cavity can provide a certain buffer space for hot gas which enters the cavity in advance, and sufficient time is provided for the hot gas to burst the explosion-proof area. Use isolation part to be applied to the battery as the example, in the battery, battery monomer sets up on the surface of first plate body, and battery monomer's pressure relief mechanism sets up with first through-hole relatively, and when battery monomer takes place thermal runaway, pressure relief mechanism opens, and battery monomer's emission gets into the cavity from first through-hole, and the cavity provides buffer space for the emission, is broken the enough time of providing for explosion-proof zone to reduce the risk that battery monomer and first plate body's interface is destroyed, and, reduced the risk that the battery takes place the explosion. Meanwhile, the first plate body keeps enough rigidity and is large in contact area with the battery cell, the isolating component has a good radiating effect on the battery cell, and the reliability of the battery is improved.

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 be applied to all devices using batteries, and for simplicity of description, the following embodiments are all described by taking an electric vehicle as an example.

In some embodiments, referring to fig. 1, the vehicle 1 may be a fuel-oil vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid electric vehicle, or an extended range vehicle. The vehicle 1 may be provided with a motor 20, a controller 30 and a battery 10, wherein the controller 30 is used for controlling the battery 10 to supply power to the motor 20. 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 10 may include a plurality of battery cells 12, wherein the plurality of battery cells 12 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. Battery 10 may also be referred to as a battery pack. Alternatively, a plurality of battery cells 12 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 the battery 10. That is, the plurality of battery cells 12 may be directly assembled into the battery 10, or may be assembled into a battery module, and then the battery module is assembled into the battery 10.

In some embodiments, referring to fig. 2, the battery 10 may include a plurality of battery cells 12. The battery 10 may further include a case 11, the inside of the case 11 is a hollow structure, and the plurality of battery cells 12 are accommodated in the case 11. The housing 11 may comprise two parts, referred to herein 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 12, 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 the box 11 having a closed chamber. The plurality of battery cells 12 are connected in parallel or in series-parallel combination and then placed in the box body 11 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.

The number of cells 12 may be set to any number according to different power requirements. Multiple cells 12 may be connected in series, parallel, or series-parallel to achieve greater capacity or power. Since the number of the battery cells 12 included in each battery 10 may be large, the battery cells 12 may be arranged in groups for convenience of installation, each group of the battery cells 12 constituting a battery module. The number of the battery cells 12 included in the battery module is not limited and may be set as required.

In some embodiments, the case 11 of the battery 10 further includes a separating member 13, referring to fig. 3, the case 11 may include a first portion 111 and a second portion 112, two sides of the second portion 112 respectively have an opening, the first portion 111 covers one side of the second portion 112, and the separating member 13 covers the other side of the second portion 112 to form a sealed case 11. In some embodiments, the bottom wall of the second portion 112 in fig. 2 may be replaced with a spacer member 13.

According to some embodiments of the present application, referring to fig. 4 and 5, the present application provides an isolation component 13, where the isolation component 13 includes a first board 131 and a second board 132, and the first board 131 is opened with a first through hole 1311. The second plate 132 is fixedly connected to the first plate 131, the second plate 132 and the first plate 131 are stacked, the second plate 132 and the first plate 131 together form a cavity 133, the cavity 133 is communicated with the first through hole 1311, and the part of the second plate 132 forming the cavity 133 is provided with an explosion-proof area 1321 for hot air to burst through.

Taking the example of applying the separation member 13 to the battery 10, the separation member 13 may be used only for supporting the battery cell 12, and may also be used for supporting the battery cell 12 and adjusting the temperature of the battery cell 12.

The first plate 131 may be made of metal, such as aluminum, iron, stainless steel, titanium alloy, and the like.

The shape of the first through hole 1311 may be circular, square, polygonal, or the like.

In some embodiments, the first plate body 131 may be used for heat conduction, meaning that the first plate body 131 may be used for heat dissipation or heating of components in contact therewith. In some embodiments, a flow channel 134 is formed between the first plate 131 and the second plate 132, the flow channel 134 is used for accommodating a fluid, the fluid may be a liquid or a gas, and optionally the fluid may be circulated to achieve a better temperature regulation effect, and optionally, the fluid may be water, a mixed liquid of water and glycol, or air.

Taking the example of applying the isolation member 13 to the battery 10, the shape of the first through hole 1311 may correspond to the shape of the pressure relief mechanism 121 of the battery cell 12, and in some embodiments in which the pressure relief mechanism 121 of the battery cell 12 protrudes out of the outer surface of the battery cell 12, after the battery cell 12 is connected to the first plate 131, a portion of the pressure relief mechanism 121 is inserted into the first through hole 1311.

The first plate 131 and the second plate 132 may be connected by welding, and the first plate 131 and the second plate 132 may also be connected by a fastener such as a bolt.

The cavity 133 may be formed in various manners, and in some embodiments, the second plate 132 is provided with a groove, and the first plate 131 covers the groove to form the cavity 133. In some embodiments, the first plate 131 is provided with a groove, and the second plate 132 covers the groove to form a cavity 133. In some embodiments, the first plate 131 has an upper groove, the second plate 132 has a lower groove, and the upper groove and the lower groove are engaged with each other to form the cavity 133 after the first plate 131 is connected to the second plate 132.

Taking the example of the application of the isolation member 13 to the battery 10, the explosion-proof area 1321 may be disposed opposite to the pressure relief mechanism 121 of the battery cell 12, so that when the pressure relief mechanism 121 is actuated, the exhaust may directly impact the explosion-proof area 1321 to burst the explosion-proof area 1321.

The explosion-proof area 1321 may adopt various arrangements for facilitating hot gas burst, which is not limited in the embodiments of the present application and will be exemplified below.

In some embodiments, the second plate 132 has a groove formed therein, and the first plate 131 covers the groove to form the cavity 133. The entire wall of the groove is a burst zone 1321, since the wall of the groove is more easily burst by hot gas than other areas of the separating element 13, the hot gas will exit the separating element 13 after bursting through the wall of the groove. The wall of the recess can be thinned so that the burst disk 1321 is more easily ruptured by hot gas. For example, a blind hole, a stepped hole, or the like may be provided in a wall portion of the groove at a position corresponding to the first through hole 1311.

In some embodiments, the second plate 132 has a groove formed therein, and the first plate 131 covers the groove to form the cavity 133. The area of the wall of the groove corresponding to the first through hole 1311 is an explosion-proof area 1321, and the explosion-proof area 1321 can be made of a low-melting-point material. For example, the main body of the groove is made of stainless steel having a melting point higher than 800 degrees celsius, a through hole is formed in the main body at a region corresponding to the first through hole 1311, and an aluminum plate having a melting point lower than 800 degrees celsius is welded in the through hole, and the aluminum plate is more easily broken by hot gas than the stainless steel to form the explosion-proof area 1321.

In some embodiments, the second plate 132 is made of an aluminum plate with a melting point lower than 800 degrees celsius, the grooves are formed by stamping, the first plate 131 covers the grooves to form the cavities 133, the overall melting point of the second plate 132 is low, the cavities 133 are communicated with the first through holes 1311, and hot air entering the cavities 133 from the first through holes 1311 can burst through the second plate 132 and be exhausted.

It is understood that the explosion-proof zone 1321 can be formed by using the low melting point material and the smaller thickness, that is, the two embodiments can be implemented separately or in combination.

In the solution of the embodiment of the present application, the second plate 132 and the first plate 131 together form the cavity 133, and hot air can enter the cavity 133 through the first through hole 1311 and burst through the explosion-proof area 1321 of the cavity 133 to exit the isolation component 13. The interior space of cavity 133 may provide a buffer space for hot gas previously introduced into cavity 133 to provide sufficient time for hot gas to burst through explosion-proof area 1321. Taking the example of applying the isolation component 13 to the battery 10, in the battery 10, the pressure relief mechanism 121 of the single battery 12 is disposed opposite to the first through hole 1311, when the single battery 12 is out of control due to heat, the pressure relief mechanism 121 is opened, the effluent of the single battery 12 enters the cavity 133 from the first through hole 1311, the cavity 133 provides a buffer space for the effluent, and provides enough time for the explosion-proof area 1321 to be broken, so as to reduce the risk of breaking the connection interface between the single battery 12 and the first plate 131, reduce the risk of explosion of the battery 10, and improve the reliability of the battery 10.

According to some embodiments of the present application, the melting point of explosion-proof zone 1321 is T, satisfying: t is less than or equal to 800 ℃.

The melting point T of the material of the portion of the second heat conduction plate where the cavity 133 is formed and the portion corresponding to the explosion-proof area 1321 may be any value not greater than 800 ℃, for example, 80 ℃, 90 ℃, 100 ℃, 110 ℃, 120 ℃, 130 ℃, 140 ℃, 150 ℃, 160 ℃, 170 ℃, 180 ℃, 190 ℃, 200 ℃, 210 ℃, 220 ℃, 230 ℃, 240 ℃, 250 ℃, 260 ℃, 270 ℃, 280 ℃, 290 ℃, 300 ℃, 310 ℃, 320 ℃, 330 ℃, 340 ℃, 350 ℃, 360 ℃, 370 ℃, 380 ℃, 390 ℃, 400 ℃, 410 ℃, 420 ℃, 430 ℃, 440 ℃, 450 ℃, 460 ℃, 470 ℃, 480 ℃, 490 ℃, 500 ℃, 510 ℃, 520 ℃, 530 ℃, 540 ℃, 550 ℃, 560 ℃, 570 ℃, 580 ℃, 590 ℃, 600 ℃, 610 ℃, 620 ℃, 630 ℃, 640 ℃, 650 ℃, 660 ℃, 670 ℃, 680 ℃, 690 ℃, 700 ℃, 710 ℃, 730 ℃, 740 ℃, 750 ℃, 760 ℃, 780 ℃, 790 ℃, 800 ℃.

The melting point of the explosion-proof area 1321 is designed within a reasonable range, and taking the example that the isolation component 13 is used for adjusting the temperature of the battery monomer 12, the risk that the battery 10 explodes due to the fact that the melting point of the explosion-proof area 1321 is too high, the difficulty of hot air breaking through the explosion-proof area 1321 is too large, and the time of breaking through the explosion-proof area 1321 is too long can be reduced.

According to some embodiments of the present application, referring to fig. 6, the thickness of the explosion-proof area 1321 is D, which satisfies: d is more than 0mm and less than or equal to 2mm.

The thickness D of the portion of the second heat conduction plate forming the cavity 133 corresponding to the explosion-proof area 1321 may be any value between 0mm and 2mm, for example, 0.05mm, 0.1mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, 0.65mm, 0.7mm, 0.75mm, 0.8mm, 0.85mm, 0.9mm, 0.95mm, 1mm, 1.05mm, 1.1mm, 1.15mm, 1.2mm, 1.25mm, 1.3mm, 1.35mm, 1.4mm, 1.45mm, 1.5mm, 1.55mm, 1.6mm, 1.65mm, 1.7mm, 1.75mm, 1.8mm, 1.85mm, 1.9mm, 2mm.

The thickness of the explosion-proof area 1321 is designed within a reasonable range, and taking the example that the isolating component 13 is used for adjusting the temperature of the battery monomer 12, on one hand, the risk of explosion of the battery 10 caused by too high thickness of the explosion-proof area 1321, too great difficulty of hot gas to break through the explosion-proof area 1321 and too long time of breaking through the explosion-proof area 1321 can be reduced; on the other hand, the risk of the explosion-proof zone 1321 having a thickness of zero, leading to a sealing failure of the separation element 13, can be reduced.

Referring to fig. 5, 6 and 7, at least a portion of blast-resistant zone 1321 faces first via 1311, according to some embodiments of the present application.

At least a portion of explosion-proof zone 1321 facing first through hole 1311 means that, when viewed in the stacking direction of first plate 131 and second plate 132, the X direction in fig. 6 is the stacking direction of first plate 131 and second plate 132, and the projection of first through hole 1311 on second plate 132 is at least partially located within explosion-proof zone 1321.

Referring to fig. 8, according to some embodiments of the present application, the explosion-proof area 1321 is an integral part of the wall of the second plate 132 forming the cavity 133.

Taking the embodiment in which second plate 132 is provided with a recess, and first plate 131 covers the recess to form cavity 133, for example, the melting point of the material of all the walls of the recess is low and/or the thickness of the material of all the walls of the recess is thin to form explosion-proof zone 1321.

With such a design, the explosion-proof area 1321 can be formed in various ways, and in some cases, compared with the case where the thickness of the portion of the second plate 132, which forms the wall surface of the cavity 133, is reduced, the thickness of the entire wall surface of the second plate 132, which forms the cavity 133, is reduced to form the explosion-proof area 1321, which has an advantage of low processing difficulty. In other cases, compared to the embodiment where the material of the explosion-proof area 1321 is different from the material of the non-explosion-proof area 1321 of the second plate 132 and needs to be assembled by welding or the like to form the second plate 132, selecting a material with a lower melting point as the whole material of the wall surface of the second plate 132 forming the cavity 133 has the advantages of low processing difficulty and low processing cost.

In some embodiments, referring to fig. 7, at least two first through holes 1311 are provided, at least one cavity 133 is provided, and each cavity 133 is communicated with the plurality of first through holes 1311.

Taking an embodiment in which the isolation component 13 is used to regulate the temperature of the battery cells 12 as an example, the pressure relief mechanisms 121 of the battery cells 12 correspond to the first through holes 1311 one by one, the plurality of battery cells 12 are arranged on the first plate, when the pressure relief mechanisms 121 of the plurality of battery cells 12 are actuated, the exhaust may enter the cavity 133 through the first through holes 1311, referring to fig. 7, the exhaust of all three battery cells 12 may enter the cavity 133 through the corresponding first through holes 1311, and the hot air that has entered the cavity 133 in advance may be buffered in the region between the three first through holes 1311 corresponding to the cavity 133.

Compared with the embodiment in which each cavity 133 corresponds to the first through hole 1311 one to one, each cavity 133 is communicated with the plurality of first through holes 1311, so that a larger buffer space can be provided for hot air entering the isolation member 13 from different first through holes 1311, and taking the embodiment in which the isolation member 13 is used to adjust the temperature of the battery cell 12 as an example, the risk that the connection interface between the battery cell 12 and the first plate 131 is damaged is further reduced, the risk that the battery 10 explodes is reduced, and the reliability of the battery 10 is improved.

According to some embodiments of the present application, please refer to fig. 5, the minimum distance between adjacent first through holes 1311 is W, and it is satisfied that W is greater than or equal to 5mm and less than or equal to 30mm.

The minimum distance between adjacent first through holes 1311 may be any value between 5mm and 30mm, for example, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, 10.5mm, 11mm, 11.5mm, 12mm, 12.5mm, 13mm, 13.5mm, 14mm, 14.5mm, 15mm, 15.5mm, 16mm, 16.5mm, 17mm, 17.5mm, 18mm, 18.5mm, 19mm, 19.5mm, 20mm, 20.5mm, 21mm, 21.5mm, 22mm, 22.5mm, 23mm, 23.5mm, 24mm, 24.5mm, 25mm, 25.5mm, 26mm, 26.5mm, 27mm, 27.5mm, 28mm, 28.5mm, 29.5mm, 29mm, 30mm.

The minimum distance between the adjacent first through holes 1311 is designed within a reasonable range, so that on one hand, the risk that the contact area between the first plate 131 and the battery cell 12 is too small due to too small minimum distance between the adjacent first through holes 1311, and the heat dissipation effect of the isolation component 13 is poor can be reduced; on the other hand, the risk of unsmooth discharge of hot gas due to the reduced entrance of hot gas from the first through holes 1311 into the cavity 133 caused by the excessively large minimum distance between the adjacent first through holes 1311 can be reduced.

According to some embodiments of the present application, referring to fig. 6, the area of the cavity 133 is larger than the area of the first through hole 1311 when viewed in the stacking direction of the first plate 131 and the second plate 132.

Referring to fig. 6, the stacking direction of the first plate 131 and the second plate 132 is the direction X in fig. 6, and the area of the cavity 133 is larger than the area of the first through hole 1311, so that most of the hot air entering the cavity 133 from the first through hole 1311 can directly act on the explosion-proof area 1321, which is beneficial to the faster rupture of the explosion-proof area 1321. The hot gas may be buffered in a region where the area of the cavity 133 is greater than the area of the first through hole 1311, as viewed in the stacking direction of the first and

second plates

131 and 132, during a time when the hot gas does not burst the explosion-proof region 1321.

The area of the cavity 133 is larger than the exhaust area of the first through hole 1311, providing a certain buffer space for the hot gas previously entering the cavity 133 through the first through hole 1311.

According to some embodiments of the present application, referring to fig. 6, a dimension of the cavity 133 in the stacking direction of the first plate body 131 and the second plate body 132 is H, which satisfies: h is more than or equal to 5 and less than or equal to 40mm.

In the case of applying the insulating member 13 to the battery 10, for example, in the battery 10, the single battery 12 is disposed on the surface of the first plate 131, the pressure relief mechanism 121 of the single battery 12 is disposed opposite to the first through hole 1311, and a sealed space is formed between the single battery 12 and the cavity 133, when the single battery 12 is thermally out of control, the pressure relief mechanism 121 is opened, and the exhaust of the single battery 12 enters the cavity 133 from the first through hole 1311, on one hand, the size of the cavity 133 in the stacking direction of the first plate 131 and the second plate 132 is too small, the buffer space provided by the cavity 133 for the hot air is insufficient, the hot air entering the cavity 133 in advance does not burst the explosion-proof area 1321 to fill the cavity 133 with the hot air, and the pressure of the cavity 133 is increased by the hot air subsequently entering the cavity 133, so that the connection interface between the single battery 12 and the first plate 131 is damaged, thereby reducing the risk of explosion of the battery 10 and improving the reliability of the battery 10; on the other hand, the risk of interference of the separator 13 with other components (e.g., a backplate) in the battery 10 due to the cavity 133 being excessively large in the stacking direction of the first plate 131 and the second plate 132 can be reduced.

According to some embodiments of the present application, referring to fig. 5 and 8, a first groove 1322 is disposed on a side of the second plate 132 facing the first plate 131, and the first plate 131 covers the first groove 1322 to form the cavity 133.

In some embodiments, first recess 1322 may be stamped and formed in second plate body 132 by a stamping apparatus. In some embodiments, the first groove 1322 may be machined in the second plate body 132 by milling or turning.

In some cases, the cavity 133 may be formed by first forming the first recess 1322 on the side of the second plate 132 facing the first plate 131 and then connecting the second plate 132 to the first plate 131, which may be difficult to process and assemble.

According to some embodiments of the present application, referring to fig. 4 and 8, a flow channel 134 for accommodating a heat exchange medium is formed between the first plate 131 and the second plate 132, and the cavity 133 and the flow channel 134 are independent from each other.

The fact that the cavity 133 and the runner 134 are independent means that the cavity 133 mainly functions to buffer the hot gas and the runner 134 mainly functions to regulate the temperature of the partition member 13.

In some embodiments, the heat exchange medium may be a fluid, and the fluid may be water, a mixture of water and glycol, air, or the like.

Providing the flow channel 134 for accommodating the heat exchange medium between the first plate 131 and the second plate 132 may improve the heat dissipation effect of the partition member 13.

According to some embodiments of the present application, referring to fig. 8, a second groove 1323 is disposed on a side of the second plate 132 facing the first plate 131, and the first plate 131 covers the second groove 1323 to form the flow channel 134.

In some embodiments, second recess 1323 may be formed by stamping in second plate body 132 with a stamping device. In some embodiments, the second groove 1323 may be machined in the second plate body 132 by milling or turning.

In some cases, the flow channel 134 may be formed by first providing the second groove 1323 on the side of the second plate 132 facing the first plate 131 and then connecting the second plate 132 and the first plate 131, so that the processing difficulty and the assembly difficulty are low.

According to some embodiments of the present application, the second plate is fixedly connected to the first plate.

According to some embodiments of the present application, referring to fig. 10 and 11, the present application further provides a battery 10, which includes a plurality of battery cells 12 and the above-mentioned separating component 13, where the battery cells 12 include a pressure relief mechanism 121. The spacer member 13 is thermally conductively connected to the plurality of battery cells 12 to adjust the temperature of the plurality of battery cells 12. The first plate 131 is located between the plurality of battery cells 12 and the second plate 132, and the pressure relief mechanism 121 is disposed opposite to the first through hole 1311.

In some embodiments, the housing of the battery cell 12 may be bonded to the first plate 131 by a thermally conductive adhesive and/or fixed to the upper surface of the first plate 131 by bolts (the housing of the battery cell 12 is in contact with the first plate 131).

In some embodiments, the pressure relief mechanism 121 is disposed opposite to the first through hole 1311, which means that, when viewed in the stacking direction of the first plate 131 and the second plate 132, a projection of the pressure relief mechanism 121 is located in the first through hole 1311, which aims to provide a sufficient opening space when the pressure relief mechanism 121 is opened, so as to reduce a risk that the pressure relief mechanism 121 interferes with a hole wall of the first through hole 1311 when the pressure relief mechanism 121 is opened, resulting in poor emission of emissions after actuation of the pressure relief mechanism 121.

In some embodiments, a portion of the pressure relief mechanism 121 may extend into the first through hole 1311 to provide sufficient open space for the pressure relief mechanism 121.

The pressure relief mechanism 121 is configured to be actuated to relieve the internal pressure or temperature of the battery cell 12 when the internal pressure or temperature reaches a threshold value.

The pressure relief mechanism 121 is disposed on the bottom wall of the battery cell 12, so that when the pressure relief mechanism 121 is activated, the discharge of the battery cell 12 is discharged to the bottom of the battery 10. This reduces the risk of emissions by means of the spacer 13 or the like at the bottom of the battery 10, on the one hand, and on the other hand, the bottom of the battery 10 is normally remote from the user, thus reducing the risk to the user.

The pressure relief mechanism 121 may be any pressure relief structure, which is not limited in the embodiments of the present application. For example, the pressure relief mechanism 121 may be a temperature-sensitive pressure relief mechanism 121, the temperature-sensitive pressure relief mechanism 121 being configured to be melted when the internal temperature of the battery cell 12 provided with the pressure relief mechanism 121 reaches a threshold value, and/or the pressure relief mechanism 121 may be a pressure-sensitive pressure relief mechanism 121, the pressure-sensitive pressure relief mechanism 121 being configured to be broken when the internal air pressure of the battery cell 12 provided with the pressure relief mechanism 121 reaches a threshold value.

In some embodiments, the pressure relief mechanism 121 is broken at the score and opened to both sides upon actuation, and accordingly, the pressure relief mechanism 121 requires a certain deformation space. The cavity 133 may provide a deformation space for the pressure relief mechanism 121 to deform and rupture the pressure relief mechanism 121 toward the second plate 132. The cavity 133 is provided to allow the pressure relief mechanism 121 to be opened upon actuation. Specifically, the depth of the cavity 133 is related to the size of the pressure relief mechanism 121. As an embodiment of the present application, the depth of the cavity 133 is greater than 5mm in the stacking direction of the first plate body 131 and the second plate body 132. Illustratively, the depth of the cavity 133 may be 5mm or greater than 5mm to facilitate the opening of the pressure relief mechanism 121. The area of the first through hole 1311 is also related to the area of the pressure relief mechanism 121. In order to allow the pressure relief mechanism 121 to be opened, the area of the first through hole 1311 may be larger than the area of the pressure relief mechanism 121 in the stacking direction of the first plate 131 and the second plate 132.

In some embodiments, referring to fig. 10-13, each first through hole 1311 corresponds to one battery cell 12, or each first through hole 1311 corresponds to a plurality of battery cells 12.

Each first through hole 1311 corresponds to a plurality of battery cells 12, in other words, the pressure relief mechanisms 121 of the plurality of battery cells 12 correspond to one first through hole 1311, and when the pressure relief mechanisms 121 of the plurality of battery cells 12 are opened, the exhaust enters the cavity 133 from the corresponding one first through hole 1311.

Referring to fig. 12, each first through hole 1311 corresponds to one battery cell 12.

Referring to fig. 13, each first through hole 1311 corresponds to two battery cells 12.

Such a design provides multiple possibilities for the manner of fitting the first through hole 1311 with the battery cell 12, and improves the compatibility of the spacer member 13 with the first through hole 1311.

According to some embodiments of the present application, referring to fig. 10 and 11, the battery 10 further includes a case 11, the isolation component 13 is disposed in the case 11 and divides an internal space of the case 11 into an electrical cavity 11a and a collection cavity 11b, the electrical cavity 11a is used for accommodating the plurality of battery cells 12, and the collection cavity 11b is used for collecting emissions of the battery cells 12 when the pressure relief mechanism 121 is activated. The explosion-proof zone 1321 is configured to be broken upon actuation of the pressure relief mechanism 121 to allow the discharge of the battery cell 12 to pass through the explosion-proof zone 1321 into the collection chamber 11b.

In some embodiments, the first plate 131 is attached to and fixedly connected to the outer edge of the second plate 132, and in some embodiments, both the first plate 131 and the second plate 132 are fixedly mounted on the inner wall of the box 11.

The electrical cavity 11a is used to accommodate a plurality of battery cells 12. The electrical cavity 11a may be sealed or unsealed. The electrical cavity 11a provides a mounting space for the battery cells 12. In some embodiments, a structure for fixing the battery cell 12 may also be provided in the electrical cavity 11 a. The shape of the electrical cavity 11a may be dependent on the number of battery cells 12 received. In some embodiments, the electrical cavity 11a may be square, having six walls. The electrical cavity 11a may also be referred to as a "high-pressure cavity" because the cells 12 within the electrical cavity 11a form a higher voltage output through the electrical connection.

The collection chamber 11b is used to collect the effluent and may be sealed or unsealed. In some embodiments, the collection chamber 11b may contain air, or other gases, therein. The electrical connections within the collection chamber 11b that are not connected to the voltage output correspond to a "high pressure chamber", and the collection chamber 11b may also be referred to as a "low pressure chamber". Alternatively or additionally, the collection chamber 11b may also contain a liquid, such as a cooling medium, or a means for containing the liquid may be provided to further cool the effluent entering the collection chamber 11b. Further optionally, the gas or liquid in the collection chamber 11b is circulated.

In some embodiments, an isolation member 13 is used to isolate the electrical cavity 11a from the collection cavity 11b. That is, the electrical chamber 11a accommodating the plurality of battery cells 12 is separated from the collection chamber 11b that collects the exhaust. In this way, when the pressure relief mechanism 121 is actuated, the exhaust of the battery cell 12 enters the cavity 133 from the first through hole 1311, passes through the explosion-proof area 1321, enters the collection chamber 11b, does not enter the electrical chamber 11a or enters the electrical chamber 11a by a small amount, so that the electrical connection in the electrical chamber 11a is not affected, and the reliability of the battery 10 can be improved.

By separating the electrical cavity 11a accommodating the battery cell 12 from the collection cavity 11b collecting the emissions by the isolation member 13, the emissions of the battery cell 12 enter the collection cavity 11b after being buffered by the cavity 133 when the pressure relief mechanism 121 is actuated, and do not enter or enter the electrical cavity 11a by a small amount, so that the electrical connection in the electrical cavity 11a is not affected, and therefore, the reliability of the battery 10 can be improved.

According to some embodiments of the present application, referring to fig. 10 and 11, the battery 10 further includes a sensing alarm device 14, and the sensing alarm device 14 is disposed in the case 11 and is used for sending an alarm signal when the concentration of the emissions is detected to be greater than the threshold value.

In some embodiments, the sensing alarm device 14 may be a temperature alarm device that sends an alarm signal when the hot gas of the emissions enters the tank 11 to raise the temperature in the tank 11, and when the temperature in the tank 11 rises to a certain value, which means that the concentration of the emissions is greater than a threshold value. In some embodiments, the sensory warning device 14 may be a smoke warning device that issues a warning when the concentration of smoke in the emissions is greater than a threshold value.

In the embodiment where the battery includes a collection chamber 11b and an electrical chamber 11a, the sensing alarm device 14 may be disposed in the electrical chamber 11a or in the collection chamber 11b.

The induction alarm device 14 sends out an alarm signal when detecting that the concentration of the emissions is greater than the threshold value, so that a user can be reminded to intervene on the battery 10 in time, and the risk of safety accidents caused by explosion of the battery 10 can be reduced to a certain extent.

According to some embodiments of the present disclosure, referring to fig. 10 and fig. 11, the sensing alarm device 14 is disposed in the electrical cavity 11a, the first plate 131 is further provided with a second through hole 1312, the second through hole 1312 is communicated with the cavity 133, and the plurality of battery cells 12 do not cover the second through hole 1312.

In some embodiments, reference is made to the dashed arrows in fig. 10 and 11, which illustrate the flow path of the hot gas when the pressure relief mechanism 121 is activated. When the pressure relief mechanism 121 is actuated, high-temperature and high-pressure gas in the emissions first impacts the explosion-proof area 1321 on the second plate 132, and under the action of a large impact force, the explosion-proof area 1321 is broken, and most of the high-temperature and high-pressure gas, the electrolyte, the dissolved or split positive and negative electrode plates, fragments of the isolating membrane, and the like in the emissions enter the collection cavity 11b to be collected. And part of the emission which enters the cavity 133 in advance can be buffered in the cavity 133 when the explosion-proof area 1321 is not broken, and a small part of hot gas in the emission enters the electrical cavity 11a from the second through hole 1312 to trigger the induction alarm device 14 to give an alarm.

For the battery 10 with the sensing alarm device 14 disposed in the electrical cavity 11a, when the pressure relief mechanism 121 is actuated, most of the emissions of the battery cell 12 enter the collecting cavity 11b after being buffered by the cavity 133, and a small amount of the emissions pass through the second through hole 1312 to trigger the sensing alarm device 14, so that the timeliness of the sensing alarm device 14 for sending an alarm signal can be improved.

According to some embodiments of the present application, there is also provided an electrical device comprising the battery 10 according to any of the above aspects, wherein the battery 10 is used for providing electrical energy.

According to some embodiments of the present application, please refer to fig. 4, 8 and 9, the present application provides an isolation component 13, where the isolation component 13 includes a first board 131 and a second board 132, and the first board 131 is provided with a first through hole 1311. The second plate 132 is fixedly connected to the first plate 131, the second plate 132 and the first plate 131 are stacked, the second plate 132 and the first plate 131 together form a cavity 133, the cavity 133 is communicated with the first through hole 1311, and the part of the second plate 132 forming the cavity 133 is provided with an explosion-proof area 1321 for hot air to burst through. Explosion-proof area 1321 is an integral part of the wall of second plate 132 that defines cavity 133. The first through holes 1311 are provided in at least two, the cavities 133 are provided in at least one, and each cavity 133 communicates with the plurality of first through holes 1311. The area of the cavity 133 is larger than the area of the first through hole 1311 as viewed in the stacking direction of the first plate body 131 and the second plate body 132. A side of the second plate 132 facing the first plate 131 is provided with a first groove 1322, and the first plate 131 covers the first groove 1322 to form the cavity 133. A flow channel 134 for accommodating a heat exchange medium is formed between the first plate 131 and the second plate 132, and the cavity 133 and the flow channel 134 are independent from each other. A side of the second plate body 132 facing the first plate body 131 is provided with a second groove 1323, and the first plate body 131 covers the second groove 1323 to form the flow passage 134. The heat exchange medium in the flow passage 134 can realize the function of adjusting the temperature of the isolation member 13. Hot gas enters the cavity 133 through the first through hole 1311, the hot gas previously entering the cavity 133 may be buffered in the cavity 133 when the explosion-proof area 1321 is not broken, and most of the hot gas passes through the second plate 132 to be discharged out of the insulation member 13 after the explosion-proof area 1321 is broken by the hot gas.

According to some embodiments of the present application, referring to fig. 4 and 8-11, the present application provides a battery 10 including a plurality of battery cells 12, a separator 13, and a case 11, the battery cells 12 including a pressure relief mechanism 121. The isolation member 13 includes a first plate 131 and a second plate 132, and the first plate 131 is provided with a first through hole 1311. The second plate 132 is fixedly connected to the first plate 131, the second plate 132 and the first plate 131 are stacked, the second plate 132 and the first plate 131 together form a cavity 133, the cavity 133 is communicated with the first through hole 1311, and the part of the second plate 132 forming the cavity 133 is provided with an explosion-proof area 1321 for hot air to burst through. Explosion-proof zone 1321 is integral with the wall of second plate 132 that defines cavity 133. The first through holes 1311 are provided in at least two, the cavities 133 are provided in at least one, and each cavity 133 communicates with the plurality of first through holes 1311. The area of the cavity 133 is larger than the area of the first through hole 1311 as viewed in the stacking direction of the first plate body 131 and the second plate body 132. A side of the second plate 132 facing the first plate 131 is provided with a first groove 1322, and the first plate 131 covers the first groove 1322 to form the cavity 133. A flow channel 134 for accommodating a heat exchange medium is formed between the first plate 131 and the second plate 132, and the cavity 133 and the flow channel 134 are independent from each other. A second groove 1323 is provided on a side of the second plate body 132 facing the first plate body 131, and the first plate body 131 covers the second groove 1323 to form the flow channel 134.

The first plate 131 is thermally connected to the plurality of battery cells 12 to adjust the temperature of the plurality of battery cells 12. The first plate 131 is located between the plurality of battery cells 12 and the second plate 132, and the pressure relief mechanism 121 is disposed opposite to the first through hole 1311. Each first through hole 1311 corresponds to one battery cell 12, the isolation member 13 is disposed in the box body 11 and divides an internal space of the box body 11 into an electrical cavity 11a and a collection cavity 11b, the electrical cavity 11a is used for accommodating a plurality of battery cells 12, and the collection cavity 11b is used for collecting emissions of the battery cells 12 when the pressure relief mechanism 121 is actuated. The explosion-proof zone 1321 is configured to be broken upon actuation of the pressure relief mechanism 121 to allow the discharge of the battery cell 12 to pass through the explosion-proof zone 1321 into the collection chamber 11b.

The battery 10 further comprises a sensing alarm device 14, the sensing alarm device 14 being arranged in the electrical chamber 11a for emitting an alarm signal when a concentration of the emissions above a threshold value is detected. The first plate 131 is further provided with a second through hole 1312, the second through hole 1312 is communicated with the cavity 133, and the plurality of battery cells 12 do not cover the second through hole 1312.

When the pressure relief mechanism 121 of the battery cell 12 is actuated, the vent has the first through hole 1311 entering the cavity 133, and the hot air in part of the vent enters the electrical cavity 11a from the second through hole 1312 to trigger the induction alarm device 14 to give an alarm. When the exhaust does not breach the explosion-proof zone 1321, the exhaust may be buffered in the cavity 133, and when the explosion-proof zone 1321 is breached, most of the exhaust passes through the second plate 132 and enters the collection chamber 11b to be collected, and in some embodiments, a pressure relief valve may be further provided on the collection chamber 11b for relieving the pressure inside the battery 10.

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, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present disclosure, and the present disclosure should be construed as being covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims

1. An isolation member, comprising:

the first plate body is provided with a first through hole;

the second plate body with first plate body range upon range of setting, the second plate body with first plate body forms the cavity jointly, the cavity communicate in first through-hole, the second plate body forms the part of cavity has the explosion-proof area that is used for supplying steam to break through.

2. The separator according to claim 1, wherein said explosion-proof zone has a melting point T satisfying: t is less than or equal to 800 ℃.

3. The separator according to claim 1, wherein said implosion protection zone has a thickness D such as to satisfy: d is more than 0mm and less than or equal to 2mm.

4. An isolation member as claimed in claim 1, wherein at least part of the blast-resistant zone faces the first through-hole.

5. An insulation member as claimed in claim 4, wherein said explosion proof area is integral with the wall of said second plate forming said cavity.

6. The spacer member according to any one of claims 1 to 5, wherein the first through-holes are provided in at least two, the cavities are provided in at least one, and each of the cavities communicates with a plurality of the first through-holes.

7. The spacer member as claimed in claim 6, wherein the minimum distance between adjacent first through holes is W, and satisfies 5mm. Ltoreq. W.ltoreq.30 mm.

8. The partition member according to claim 1, wherein an area of the cavity is larger than an area of the first through hole as viewed in a stacking direction of the first plate body and the second plate body.

9. The partition member according to claim 1, wherein a dimension of the cavity in a stacking direction of the first plate body and the second plate body is H, and satisfies: h is more than or equal to 5mm and less than or equal to 40mm.

10. The spacer member as claimed in claim 1, wherein a side of the second plate body facing the first plate body is provided with a first groove, the first plate body covering the first groove to form the cavity.

11. The separator member according to claim 1, wherein a flow channel for receiving a heat exchange medium is formed between said first plate body and said second plate body, and said cavity is independent from said flow channel.

12. The spacer member as claimed in claim 11, wherein a side of the second plate body facing the first plate body is provided with a second groove, and the first plate body covers the second groove to form the flow passage.

13. The spacer member of claim 1 wherein the second plate is fixedly attached to the first plate.

14. A battery, comprising:

the battery units comprise a pressure relief mechanism;

the isolation component of any of claims 1-13, in thermally conductive connection with the plurality of battery cells to regulate a temperature of the plurality of battery cells;

the first plate body is located between the battery single bodies and the second plate body, and the pressure relief mechanism is opposite to the first through hole.

15. The battery of claim 14, wherein each of the first through holes corresponds to one of the battery cells, or each of the first through holes corresponds to a plurality of the battery cells.

16. The battery of claim 14, further comprising a case, wherein the isolation component is disposed in the case and divides an internal space of the case into an electrical cavity for accommodating the plurality of battery cells and a collection cavity for collecting emissions of the battery cells when the pressure relief mechanism is actuated;

the explosion-proof area is configured to be destroyed when the pressure relief mechanism is actuated, so that the discharge of the battery cell passes through the explosion-proof area and enters the collection cavity.

17. The battery of claim 16, further comprising an inductive alarm device disposed within the housing for emitting an alarm signal upon detecting a concentration of the emissions greater than a threshold value.

18. The battery of claim 17, wherein the sensing alarm device is disposed in the electrical cavity, the first board body further includes a second through hole, the second through hole is communicated with the cavity, and the plurality of battery cells do not cover the second through hole.

19. An electrical consumer, characterized in that the consumer comprises a battery according to any of claims 14-18 for providing electrical energy.