CN115863901B

CN115863901B - Isolation part, battery and electric equipment

Info

Publication number: CN115863901B
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: 2023-11-28
Anticipated expiration: 2043-03-01
Also published as: CN115863901A

Abstract

The application discloses an isolation part, a battery and electric equipment, and belongs to the field of batteries. The isolation part 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 stacked, the second plate body and the first plate body form a cavity together, the cavity is communicated with the first through hole, and the part of the second plate body forming the cavity is provided with an explosion-proof area for hot air burst. Taking the application of the isolation part to the battery as an example, in the battery, when thermal runaway occurs in the battery monomer, the pressure release mechanism is opened, the emission of the battery monomer enters the cavity from the first through hole, the cavity provides buffer space for the emission, and enough time is provided for the explosion-proof area to be broken, so that the risk of damaging the connection interface between the battery monomer and the first plate body is reduced, the risk of explosion of the battery is reduced, and the reliability of the battery is improved.

Description

Isolation part, battery and electric equipment

Technical Field

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

Background

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

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

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

Disclosure of Invention

In view of the above problems, the application provides an isolation component, a battery and electric equipment, which can improve the reliability of the battery in use.

In a first aspect, the present application provides an isolation member, where the isolation member includes 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 stacked, the second plate body and the first plate body form a cavity together, the cavity is communicated with the first through hole, and the part of the second plate body forming the cavity is provided with an explosion-proof area for hot air burst.

In the technical scheme of the embodiment of the application, the second plate body and the first plate body form a cavity together, and hot air can enter the cavity through the first through hole and burst the 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 entering the cavity in advance, and enough time is provided for the hot gas to break through the explosion-proof area. Taking the isolation part as an example, in the battery, the battery monomer is arranged on the surface of the first plate body, the pressure release mechanism of the battery monomer is arranged opposite to the first through hole, when the battery monomer is in thermal runaway, the pressure release mechanism is opened, the emission of the battery monomer enters the cavity from the first through hole, the cavity provides buffer space for the emission, enough time is provided for the explosion-proof area to be broken, so that the risk of the connection interface between the battery monomer and the first plate body being damaged is reduced, the risk of explosion of the battery is reduced, and the reliability of the battery is improved.

In some embodiments, the explosion-proof region has a melting point T that satisfies: t is less than or equal to 800 ℃. The melting point of the explosion-proof area is designed in a reasonable range, and the isolating part is applied to the battery as an example, so that the risk of explosion of the battery caused by overlarge melting point of the explosion-proof area, overlarge difficulty in bursting the explosion-proof area by hot air and overlong time for bursting the explosion-proof area can be reduced.

In some embodiments, the explosion-proof area has a thickness D that satisfies: 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 the isolating part is applied to the battery for example, so that on one hand, the risk of explosion of the battery caused by overlarge thickness of the explosion-proof area, overlarge difficulty of bursting the explosion-proof area by hot air and overlong time of bursting the explosion-proof area can be reduced; on the other hand, the thickness of the explosion-proof area can be reduced to zero, resulting in the risk of sealing failure of the isolation component.

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

In some embodiments, the explosion proof area is the entirety of the wall of the second panel that forms the cavity. In such a design, the explosion-proof area may be formed in various manners, and in some cases, compared with the thickness reduction of the portion of the second plate body where the wall surface of the cavity is formed, the thickness reduction of the entire wall surface of the second plate body where the cavity is formed is reduced to form the explosion-proof area, which has the advantage of low processing difficulty. In other cases, compared with the embodiment that the material of the explosion-proof area is different from the material of the non-explosion-proof area of the second plate body, and the second plate body is assembled and formed by welding or other modes, the method has the advantages that the processing difficulty is low and the processing cost is low because the material with the lower melting point is selected as the whole material of the wall surface of the second plate body for forming the cavity.

In some embodiments, the first through holes are provided with at least two, the cavities are provided with at least one, and each cavity is in communication with a plurality of the first through holes. Compared with the embodiment that each cavity corresponds to the first through holes one by one, each cavity is communicated with the plurality of first through holes, larger buffer space can be provided for hot air entering the isolation component from different first through holes, and the embodiment that the isolation component is used for adjusting the temperature of the battery monomer is taken as an example, so that the risk that the connection interface between the battery monomer and the first plate body is damaged is further reduced, the risk of explosion of the battery is reduced, and the reliability of the battery is improved.

In some embodiments, the minimum distance between adjacent first through holes is W, satisfying 5 mm.ltoreq.W.ltoreq.30 mm. The minimum distance between the adjacent first through holes is designed in a reasonable range, so that on one hand, the risk of poor heat dissipation effect of the isolation component caused by the fact that the contact area between the first plate body and the battery monomer is too small due to the fact that the minimum distance between the adjacent first through holes is too small can be reduced; on the other hand, the risk of unsmooth hot gas exhaust caused by the fact that the minimum distance between the adjacent first through holes is too large and the inlet of hot gas entering the cavity from the first through holes is reduced can be reduced.

In some embodiments, the cavity has an area larger than an area of the first through hole, as viewed in a lamination direction of the first plate body and the second plate body. Compared with the exhaust area of the first through hole, the area of the cavity is larger, and a certain buffer space is provided for hot gas which passes through the first through hole in advance and enters the cavity.

In some embodiments, the cavity has a dimension H in the stacking direction of the first and second plates, 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, the isolation part is applied to a battery as an example, in the battery, a battery monomer is arranged on the surface of the first plate body, a pressure release mechanism of the battery monomer is opposite to the first through hole, a closed space is formed between the battery monomer and the cavity, when the battery monomer is out of control, the pressure release mechanism is opened, and the discharge of the battery monomer enters the cavity from the first through hole, so that on one hand, the buffer space provided by the cavity for hot air is insufficient, the hot air which enters the cavity in advance does not break an explosion-proof area to enable the cavity to be filled with the hot air, the pressure of the cavity is increased by the hot air which enters the cavity, the connecting interface of the battery monomer and the first plate body is damaged, the risk of explosion of the battery is reduced, and the reliability of the battery is improved; on the other hand, the risk of interference of the spacer member with other members (such as the bottom plate) in the battery due to the oversized cavity in the stacking direction of the first plate body and the second plate body can be reduced.

In some embodiments, a side of the second plate facing the first plate is provided with a first groove, the first plate covering the first groove to form a cavity. In some cases, the cavity can be formed by arranging the first 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, a flow channel for accommodating the heat exchange medium is formed between the first plate body and the second plate body, and the cavity and the flow channel are independent. The heat dissipation effect of the isolation component can be improved by arranging the flow channel for accommodating the heat exchange medium between the first plate body and the second plate body.

In some embodiments, a side of the second plate facing the first plate is provided with a second groove, and the first plate covers the second groove to form a flow channel. In some cases, the flow channel 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 in the above embodiments, the battery cells comprising a pressure relief mechanism. The isolation component is in heat conduction connection with the plurality of battery cells so as to adjust the temperature of the plurality of battery cells. The first plate body is located between the plurality of battery monomers and the second plate body, and the pressure release mechanism and the first through hole are oppositely arranged.

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

In some embodiments, the battery further comprises a housing, the isolation member is disposed within the housing and separates an interior space of the housing into an electrical cavity for containing the plurality of battery cells and a collection cavity for collecting emissions of the battery cells upon actuation of the pressure relief mechanism. The explosion proof area is configured to be broken upon actuation of the pressure relief mechanism to allow the discharge of the battery cells through the explosion proof area into the collection chamber. The isolation part is used for separating the electric cavity containing the battery monomer from the collection cavity for collecting the emission, when the pressure release mechanism is actuated, the emission of the battery monomer enters the collection cavity after buffering of the cavity, and does not enter or slightly enters the electric cavity, so that electric connection in the electric cavity is not affected, and the reliability of the battery can be improved.

In some embodiments, the battery further comprises a sensing alarm disposed within the housing for emitting an alarm signal when the concentration of the emissions is detected to be greater than a threshold. The sensing alarm device sends an alarm signal when detecting that the concentration of the discharged matters is larger than a threshold value, can prompt a user to intervene on the battery in time, and can reduce the risk of safety accidents caused by explosion of the battery to a certain extent.

In some embodiments, the induction alarm device is disposed in the electric cavity, and 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 release mechanism is actuated, most of the emissions of the battery monomer enter the collecting cavity after buffering of the cavity, and the small part of the emissions pass through the second through hole to trigger the induction alarm device, so that the timeliness of the induction alarm device for sending alarm signals can be improved.

In a third aspect, the present application provides a powered device, which includes a battery in the foregoing embodiment, where the battery is configured to provide electrical energy.

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

Drawings

Various other 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. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

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

fig. 2 is a schematic view of a battery according to some embodiments of the present application;

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

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

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

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

FIG. 7 is a schematic view of the structure of an isolation member according to still other embodiments of the present application;

FIG. 8 is a schematic view of the structure of an isolation member according to other embodiments of the present application;

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

fig. 10 is a schematic view showing the structure of a battery according to still other embodiments of the present application;

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

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

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

Reference numerals in the specific embodiments are as follows:

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

Detailed Description

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

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

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

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

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

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

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

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 embodiment of the present application. The battery cell may be in a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, which is not limited in this embodiment of the application. The battery cells are generally classified into three types according to the packaging method: the cylindrical battery cell, the square battery cell and the soft package battery cell are not limited in this embodiment.

Reference to a battery in accordance with an embodiment of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. The battery generally includes a case for enclosing one or more battery cells. The case body can prevent liquid or other foreign matters from affecting the charge or discharge of the battery cells.

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate.

The development of battery technology is to consider various design factors, such as energy density, cycle life, discharge capacity, charge-discharge rate, and other performance parameters, and further, the reliability of the battery during use needs to be considered.

For the battery cells, the main safety hazard comes from the charging and discharging process, and at the same time, the battery cells are generally provided with at least three protection measures for effectively avoiding unnecessary loss due to the proper environmental temperature design. In particular, the protective measures comprise at least a switching element, a selection of a suitable isolating membrane material and a pressure relief mechanism.

A pressure relief mechanism refers to an element or component that actuates to relieve internal pressure or temperature of a battery cell when the internal pressure or temperature or other condition reaches a predetermined threshold. The threshold design varies according to design requirements. The threshold value may depend on the material of one or more of the positive electrode tab, the negative electrode tab, the electrolyte and the separator in the battery cell. The pressure release mechanism may take the form of, for example, an explosion-proof valve, a gas valve, a pressure release valve, or a safety valve, and may specifically take the form of a pressure-sensitive or temperature-sensitive element or structure, i.e., when the internal pressure or temperature of the battery cell or other conditions reach a predetermined threshold, the pressure release mechanism performs an action or a weak structure provided in the pressure release mechanism is broken, thereby forming an opening or a channel through which the internal pressure or temperature can be released.

The term "actuated" as used herein refers to the pressure relief mechanism being actuated or activated to a state such that the internal pressure and temperature of the battery cells 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 breaks, melts, is torn or opened, etc. When the pressure release mechanism is actuated, high-temperature and high-pressure substances inside the battery cell are discharged outwards from the actuated position as emissions. In this way, the pressure and temperature of the battery cell can be relieved under the condition of controllable pressure or temperature, so that the occurrence of a potential serious accident is avoided.

References to emissions from a battery cell in the present application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of a separation membrane, 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 member is generally provided in the case. The isolation member generally includes a temperature adjustment plate, which is typically located at the bottom of the case and fixedly mounted to the side wall of the case. The battery cell is generally connected with the upper surface of the temperature adjusting plate through heat-conducting glue and/or fixed on the temperature adjusting plate through fasteners such as bolts, so that the battery cell contacts with the temperature adjusting plate, and the temperature of the battery cell contacted with the temperature adjusting plate changes when the temperature of the temperature adjusting plate changes.

The separator is a member for regulating the temperature of the plurality of battery cells. In general, the isolating member has a fluid capable of adjusting the temperature of the plurality of battery cells, wherein the fluid may be a liquid or a gas, and the temperature adjustment refers to heating or heat dissipation of the plurality of battery cells. In the case of cooling or warming up the battery cells, the spacer member may be referred to as a cooling member, a cooling system, a cooling plate, or the like, and the fluid it contains may also be referred to as a cooling medium or cooling fluid, and more specifically, may be referred to as a cooling liquid or cooling gas. In addition, the separator may also be used for heating to warm up the plurality of battery cells, which is not limited by the embodiment of the present application. Alternatively, the fluid may be circulated to achieve better temperature regulation. Alternatively, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

The pressure release mechanism can be arranged at the bottom of the battery cell, at the side surface of the battery cell and the like. Taking the battery with the pressure release mechanism arranged at the bottom of the battery monomer as an example, in order to ensure that the pressure release mechanism can normally turn over to open pressure release during actuation, an avoidance cavity is generally required to be arranged in the lower area of the battery. Considering that the isolation member is generally located at the bottom of the case in general, a designer may integrate the escape cavity corresponding to the battery cell on the isolation member.

Taking the case that the isolation part is applied to the battery, the common avoidance cavity is integrated on the isolation part and mainly comprises the following two conditions, wherein one condition is that a plurality of through holes corresponding to the pressure release mechanisms of the battery are formed in the cooling plate one by one, a lower plate body capable of covering the through holes is attached below the cooling plate so as to ensure the tightness of the box body, the independent space surrounded by the through holes and the lower plate body forms the avoidance cavity, and a sealed space is generally formed between the battery 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 for avoiding the cavity is small. For the battery monomer with low energy density or low charge state, when the pressure release mechanism is actuated, the instantaneous temperature of the emission of the battery monomer or the instantaneous impact force of the emission can not instantaneously break through the lower plate body, and the high-temperature gas in the emission can not be timely discharged after filling the avoidance cavity. Under the condition that high-temperature gas continuously enters the avoidance cavity, the pressure in the avoidance cavity is gradually increased, and the connection interface of the battery monomer and the cooling plate can be broken by the excessive pressure, so that the connection of the battery monomer and the cooling plate fails, or more and more high-temperature gas which cannot be discharged outwards is accumulated in the battery monomer, the top cover of the battery monomer is exploded, and further the reliability of the battery monomer in the use process is poor.

Another case is that a strip-shaped hole corresponding to the pressure release mechanisms of all the battery cells is formed on the cooling plate, and a lower plate body capable of covering the strip-shaped hole is attached below the cooling plate so as to ensure the tightness of the box body. The independent space enclosed by the strip-shaped hole and the lower plate body forms an avoidance cavity. Under the condition, although the space of the avoidance cavity is larger, the buffer effect of the avoidance cavity on the emission is better, the contact area of the battery monomer and the cooling plate is small, the heat dissipation or heating effect of the cooling plate on the battery monomer is poor, and the reliability of the battery is poor when the battery is used in a high-temperature or cold environment.

In view of the above, the present application provides an isolation member, which includes a first plate body and a second plate body, where the first plate body is provided with 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, 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 an explosion-proof area for hot air burst is formed in the portion of the second plate body forming the cavity. The second plate body and the first plate body jointly form a cavity, and hot air can enter the cavity through the first through hole and break through an explosion-proof area of the cavity so as to be discharged out of the isolation part. The inner space of the cavity can provide a certain buffer space for hot gas entering the cavity in advance, and enough time is provided for the hot gas to break through the explosion-proof area. Taking the isolation part as an example, in the battery, the battery monomer is arranged on the surface of the first plate body, the pressure release mechanism of the battery monomer is arranged opposite to the first through hole, when the battery monomer is in thermal runaway, the pressure release mechanism is opened, the emission of the battery monomer enters the cavity from the first through hole, the cavity provides buffer space for the emission, enough time is provided for the explosion-proof area to be broken, so that the risk that the connection interface between the battery monomer and the first plate body is damaged is reduced, and the risk of explosion of the battery is reduced. Meanwhile, the first plate body keeps enough rigidity and has larger contact area with the battery monomer, the isolation part has better heat dissipation effect on the battery monomer, and the reliability of the battery is improved.

The technical solutions described in the embodiments of the present application are applicable to various devices using batteries, for example, mobile phones, portable devices, notebook computers, battery cars, electric toys, electric tools, electric vehicles, ships, spacecraft, and the like, and for example, spacecraft include airplanes, rockets, space shuttles, spacecraft, and the like.

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

In some embodiments, referring to fig. 1, a vehicle 1 may be a fuel-oil vehicle, a gas-oil vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The motor 20, the controller 30 and the battery 10 may be provided inside the vehicle 1, and the controller 30 is configured to control 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 the tail of the vehicle 1. The battery 10 may be used for power supply of the vehicle 1, e.g. the battery 10 may be used as an operating power source for the vehicle 1, for electrical circuitry of the vehicle 1, e.g. for start-up, navigation and operational power requirements of the vehicle 1. In another embodiment of the present application, the battery 10 may be used not only as an operating power source for the vehicle 1 but also as a driving power source for the vehicle 1, instead of or in part instead of fuel oil or natural gas, to supply driving power to the vehicle 1.

To meet different power requirements, the battery 10 may include a plurality of battery cells 12, where the plurality of battery cells 12 may be connected in series or parallel or a series-parallel connection, where a series-parallel connection refers to a mixture of series and parallel connections. The battery 10 may also be referred to as a battery pack. Alternatively, the plurality of battery cells 12 may be connected in series or parallel or series-parallel to form a battery module, and then connected in series or parallel or 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 the battery module may be 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, in which the case 11 has a hollow structure, and a plurality of battery cells 12 are accommodated in the case 11. The housing 11 may include two portions, referred to herein as a first portion 111 and a second portion 112, respectively, the first portion 111 and the second portion 112 snap together. The shape of the first portion 111 and the second portion 112 may be determined according to the shape of the combination of the plurality of battery cells 12, and each of the first portion 111 and the second portion 112 may have one opening. For example, each of the first portion 111 and the second portion 112 may be a hollow rectangular parallelepiped and each has only one surface as an open surface, the opening of the first portion 111 and the opening of the second portion 112 are disposed opposite to each other, and the first portion 111 and the second portion 112 are fastened to each other to form the case 11 having a closed chamber. The plurality of battery cells 12 are mutually connected in parallel or in series-parallel combination and then are placed in the box 11 formed by buckling the first part 111 and the second part 112. Alternatively, the battery 10 may further include other structures, which are not described in detail herein.

The number of battery cells 12 may be set to any number depending on the different power requirements. The plurality of battery cells 12 may be connected in series, parallel, or series-parallel to achieve a larger capacity or power. Since the number of battery cells 12 included in each battery 10 may be large, the battery cells 12 may be arranged in groups for easy installation, and each group of battery cells 12 constitutes a battery module. The number of battery cells 12 included in the battery module is not limited and may be set according to requirements.

In some embodiments, the case 11 of the battery 10 further includes a separation member 13, referring to fig. 3, the case 11 may include a first portion 111 and a second portion 112, both sides of the second portion 112 have openings, respectively, the first portion 111 covers one side opening of the second portion 112, and the separation member 13 covers the other side opening 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 the spacer member 13.

According to some embodiments of the present application, referring to fig. 4 and 5, the present application provides an isolation member 13, where 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 portion of the second plate 132 forming the cavity 133 is provided with an explosion-proof area 1321 for hot air burst.

Taking the example that the spacer 13 is applied to the battery 10, the spacer 13 may be used only to support the battery cells 12, or may be used to support the battery cells 12 and adjust the temperature of the battery cells 12.

The material of the first plate 131 may be metal, such as aluminum, iron, stainless steel, titanium alloy, etc.

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

In some embodiments, the first plate 131 may be used to conduct heat, meaning that the first plate 131 may be used to dissipate heat or heat from components in contact therewith. In some embodiments, a flow channel 134 is formed between the first plate body 131 and the second plate body 132, where the flow channel 134 is used to hold a fluid, and the fluid may be a liquid or a gas, and optionally the fluid may be circulated to achieve a better temperature adjustment effect, and optionally the fluid may be water, a mixed solution of water and ethylene glycol, or air, etc.

Taking the example that the isolation component 13 is applied to the battery 10, the shape of the first through hole 1311 may correspond to the shape of the pressure release mechanism 121 of the battery cell 12, and in some embodiments in which the pressure release 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 release 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 be connected by fastening members such as bolts.

The cavity 133 may be formed in a variety of ways, 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 the cavity 133. In some embodiments, the first plate 131 is provided with an upper groove, the second plate 132 is provided with a lower groove, and after the first plate 131 is connected to the second plate 132, the upper groove and the lower groove are mutually buckled to form a cavity 133.

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

The explosion-proof area 1321 may be provided in various arrangements for facilitating hot gas break, and the embodiments of the present application are not limited thereto, and are exemplified below.

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. The entire wall of the groove is the explosion-proof area 1321, and since the wall of the groove is more easily broken by the hot air relative to other areas of the isolation member 13, the hot air is discharged out of the isolation member 13 after breaking the wall of the groove. The wall of the recess may be thinned so that the burst region 1321 is more easily broken by the 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 is provided with a groove, and the first plate 131 covers the groove to form the cavity 133. The wall of the groove corresponds to the first through hole 1311 and is an explosion-proof area 1321, and the explosion-proof area 1321 may be made of a low melting point material. For example, the main body of the groove is made of stainless steel with a melting point higher than 800 ℃, a through hole is formed in a region corresponding to the first through hole 1311 on the main body, an aluminum plate with a melting point lower than 800 ℃ is welded in the through hole, and the aluminum plate is more easily broken by hot air than the stainless steel to form the explosion-proof area 1321.

In some embodiments, the material of the second plate 132 is 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 cavity 133, the overall melting point of the second plate 132 is lower, the cavity 133 is communicated with the first through hole 1311, and the hot air can break through the second plate 132 after entering the cavity 133 from the first through hole 1311 and be discharged.

It will be appreciated that the burst region 1321 may be provided with both a low melting point material and a reduced thickness, i.e., both embodiments may be implemented separately or in combination.

In the technical solution of the embodiment of the present application, the second plate 132 and the first plate 131 together form a 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 be discharged out of the isolation member 13. The interior space of the cavity 133 may provide a buffer space for hot gas previously introduced into the cavity 133 to provide sufficient time for the hot gas to burst the explosion-proof area 1321. Taking the example that the isolation component 13 is applied to the battery 10, in the battery 10, the pressure release mechanism 121 of the battery cell 12 is arranged opposite to the first through hole 1311, when the battery cell 12 is in thermal runaway, the pressure release mechanism 121 is opened, the discharged material of the battery cell 12 enters the cavity 133 from the first through hole 1311, the cavity 133 provides a buffer space for the discharged material, and enough time is provided for the explosion-proof area 1321 to be broken, so that the risk of damaging the connection interface of the battery cell 12 and the first plate 131 is reduced, the risk of explosion of the battery 10 is reduced, and the reliability of the battery 10 is improved.

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

The material of the second plate 132 forming the portion of the cavity 133 corresponding to the explosion-proof region 1321 may have a melting point T of any value of 800 ℃ or less, 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 ℃, 750 ℃, 760 ℃, 770 ℃, 780 ℃, 790 ℃, and 800 ℃.

The melting point of the explosion-proof area 1321 is designed within a reasonable range, taking the case that the isolation component 13 is used for adjusting the temperature of the battery unit 12 as an example, the risk of explosion of the battery 10 caused by too high melting point of the explosion-proof area 1321 and too high difficulty of hot gas bursting the explosion-proof area 1321 and too long time of bursting the explosion-proof area 1321 can be reduced.

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

The thickness D of the portion of the second plate 132 where the cavity 133 is formed, corresponding to the explosion-proof area 1321, may be any value between greater than 0mm and less than or equal to 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, taking the case that the isolation part 13 is used for adjusting the temperature of the battery unit 12 as an example, on one hand, the risk of explosion of the battery 10 caused by overlarge thickness of the explosion-proof area 1321, overlarge difficulty of bursting the explosion-proof area 1321 by hot air and overlong time of bursting the explosion-proof area 1321 can be reduced; on the other hand, the thickness of the explosion-proof area 1321 may be reduced to zero, resulting in a risk of failure of the seal of the partition member 13.

Referring to fig. 5, 6 and 7, at least a portion of the explosion proof area 1321 faces the first through hole 1311 according to some embodiments of the present application.

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

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

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

In such a design, the explosion-proof area 1321 may be formed in various manners, and in some cases, compared to the thickness of the portion of the second plate 132 forming the wall surface of the cavity 133, the thickness of the entire wall surface of the second plate 132 forming 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 in which 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 the second plate 132 is assembled by welding or the like, selecting a material with a lower melting point as the material of the whole 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, the first through holes 1311 are provided with at least two, and the cavities 133 are provided with at least one, and each cavity 133 communicates with a plurality of the first through holes 1311.

Taking an embodiment in which the isolation component 13 is used to adjust the temperature of the battery cells 12 as an example, the pressure release mechanisms 121 of the battery cells 12 are in one-to-one correspondence with the first through holes 1311, a plurality of battery cells 12 are arranged on the first plate, when the pressure release mechanisms 121 of the battery cells 12 are actuated, the exhaust can enter the cavity 133 through the first through holes 1311, referring to fig. 7, the exhaust of three battery cells 12 can enter the cavity 133 through the corresponding first through holes 1311, and the hot air that has previously entered the cavity 133 can be buffered in the area between the corresponding three first through holes 1311 of the cavity 133.

Compared with the embodiment that each cavity 133 corresponds to the first through holes 1311 one by one, each cavity 133 is communicated with a plurality of first through holes 1311, so that a larger buffer space can be provided for hot air entering the isolation component 13 from different first through holes 1311, and the embodiment that the isolation component 13 is used for adjusting the temperature of the battery cell 12 is taken 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, referring to FIG. 5, the minimum distance between adjacent first through holes 1311 is W, which is 5 mm.ltoreq.W.ltoreq.30 mm.

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, 27mm, 27.5mm, 28mm, 28.5mm, 29mm, 29.5mm, 30mm.

The minimum distance between the adjacent first through holes 1311 is designed within a reasonable range, so that on one hand, the risk of poor heat dissipation effect of the isolation component 13 caused by too small contact area between the first plate 131 and the battery cell 12 due to too small minimum distance between the adjacent first through holes 1311 can be reduced; on the other hand, the risk of unsmooth exhaust of the hot gas due to the excessively large minimum distance between the adjacent first through holes 1311, the entrance of the hot gas from the first through holes 1311 into the cavity 133, is 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 as viewed in the lamination direction of the first plate body 131 and the second plate body 132.

Referring to fig. 6, the stacking direction of the first plate 131 and the second plate 132 is the X direction 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 rapid rupture of the explosion-proof area 1321. The hot gas may be buffered in a region of the cavity 133 having an area greater than that of the first through hole 1311 as viewed in the lamination direction of the first and second plate bodies 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 passing through the first through hole 1311 into the cavity 133.

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

The dimension of the cavity 133 in the lamination direction of the first plate body 131 and the second plate body 132 may be any value of 5mm or more and 40mm or less, for example, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8mm, 8.2mm, 8.4mm, 8.6mm, 8.8mm, 9mm, 9.2mm, 9.4mm, 9.6mm, 9.8mm, 10mm, 10.2mm, 10.4mm, 10.6mm, 10.8mm, 11mm, 11.2mm, 11.4mm, 11.6mm, 11.8mm, 12mm, 12.4mm, 12.6mm, 12.8mm, 13mm, 13.4mm, 13.6mm, 13.8mm, 14mm, 10.2mm, 11.8mm 14.2mm, 14.4mm, 14.6mm, 14.8mm, 15mm, 15.2mm, 15.4mm, 15.6mm, 15.8mm, 16mm, 16.2mm, 16.4mm, 16.6mm, 16.8mm, 17mm, 17.2mm, 17.4mm, 17.6mm, 17.8mm, 18mm, 18.2mm, 18.4mm, 18.6mm, 18.8mm, 19mm, 19.2mm, 19.4mm, 19.6mm, 19.8mm, 20mm, 20.2mm, 20.4mm, 20.6mm, 20.8mm, 21mm, 21.2mm, 21.4mm, 21.6mm, 21.8mm, 22mm, 22.2mm, 22.4mm, 22.6mm, 20.8mm 14.2mm, 14.4mm, 14.6mm, 14.8mm, 15mm, 15.2mm, 15.4mm, 15.6mm, 15.8mm, 16mm, 16.2mm, 16.4mm, 16.6mm, 16.8mm, 17mm, 17.2mm, 17.4mm, 17.6mm, 17.8mm, 18mm, 18.2mm, 18.4mm, 18.2mm 18.6mm, 18.8mm, 19mm, 19.2mm, 19.4mm, 19.6mm, 19.8mm, 20mm, 20.2mm, 20.4mm, 20.6mm, 20.8mm, 21mm, 21.2mm, 21.4mm, 21.6mm, 21.8mm, 22mm, 22.2mm, 22.4mm, 22.6 mm.

The dimensions of the cavity 133 in the stacking direction of the first plate body 131 and the second plate body 132 are designed within a reasonable range, taking the example that the isolation component 13 is applied to the battery 10, in the battery 10, the battery cell 12 is arranged on the surface of the first plate body 131, the pressure release mechanism 121 of the battery cell 12 is arranged opposite to the first through hole 1311, a closed space is formed between the battery cell 12 and the cavity 133, when the battery cell 12 is out of control, the pressure release mechanism 121 is opened, and the discharge of the battery cell 12 enters the cavity 133 from the first through hole 1311, on one hand, the risk that the battery 10 explodes due to the fact that the size of the cavity 133 in the stacking direction of the first plate body 131 and the second plate body 132 is too small, the buffer space provided by the cavity 133 for hot air is insufficient, the hot air which enters the explosion-proof area 1321 in advance is not broken to fully charge the cavity 133 with hot air, and the pressure of the cavity 133 is increased by the hot air which subsequently enters the cavity 133, the connecting interface of the battery cell 12 and the first plate body 131 is destroyed, and the reliability of the battery 10 is improved; on the other hand, the risk of interference of the spacer member 13 with other members (e.g., the bottom plate) in the battery 10 due to the oversized dimensions of the cavity 133 in the stacking direction of the first plate body 131 and the second plate body 132 can be reduced.

According to some embodiments of the present application, referring to fig. 5 and 8, 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.

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

In some cases, the cavity 133 may be formed by first disposing the first groove 1322 on the side of the second plate 132 facing the first plate 131 and then connecting the second plate 132 with the first plate 131, so as to reduce the processing difficulty and the assembly difficulty.

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 is independent from the flow channel 134.

Independent of the cavity 133 and the flow channel 134 means that the cavity 133 is mainly used for buffering hot gas and the flow channel 134 is mainly used for adjusting the temperature of the partition 13.

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

Providing the flow passage 134 for accommodating the heat exchange medium between the first plate body 131 and the second plate body 132 can improve the heat radiation effect of the separation member 13.

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

In some embodiments, the second groove 1323 may be formed by stamping on the second plate 132 by a stamping apparatus. In some embodiments, the second groove 1323 may be machined in the second plate 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 with 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 132 is fixedly coupled to the first plate 131.

Referring to fig. 10 and 11, the present application further provides a battery 10, which includes a plurality of battery cells 12 and the isolating component 13 according to any of the above schemes, wherein the battery cells 12 include a pressure release mechanism 121. The isolation member 13 is thermally connected with 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 release mechanism 121 is disposed opposite to the first through hole 1311.

In some embodiments, the housing of the battery cell 12 may be adhered to the first plate 131 by a heat 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 the first through hole 1311, meaning that, as viewed in the stacking direction of the first plate 131 and the second plate 132, the projection of the pressure relief mechanism 121 is located within the first through hole 1311, with the purpose of having sufficient opening space when the pressure relief mechanism 121 is opened, reducing the risk of interfering with the wall of the first through hole 1311 when the pressure relief mechanism 121 is opened, resulting in unsmooth discharge of emissions after actuation of the pressure relief mechanism 121.

In some embodiments, portions of the components of the pressure relief mechanism 121 may extend into the interior of the first through hole 1311 such that the pressure relief mechanism 121 has sufficient open space.

The pressure release mechanism 121 is used to actuate to release the internal pressure or temperature of the battery cell 12 when the internal pressure or temperature reaches a threshold.

Typically, the pressure release mechanism 121 is disposed on the bottom wall of the battery cell 12, so that when the pressure release mechanism 121 is actuated, the exhaust of the battery cell 12 is discharged to the bottom of the battery 10. In this way, on the one hand, the risk of emissions can be reduced by the spacer member 13 or the like at the bottom of the battery 10, and on the other hand, the bottom of the battery 10 is generally away from the user, so that the risk to the user can be reduced.

The pressure relief mechanism 121 may be any of a variety of possible pressure relief structures, and embodiments of the present application are not limited in this regard. For example, the pressure relief mechanism 121 may be a temperature-sensitive pressure relief mechanism configured to melt 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 configured to rupture 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 breaks at the score and opens to both sides upon actuation, and accordingly, the pressure relief mechanism 121 requires some deformation space. The cavity 133 may provide a deformation space for the pressure relief mechanism 121 to deform and fracture the pressure relief mechanism 121 toward the second plate 132. The cavity 133 is provided to meet the conditions that enable the pressure relief mechanism 121 to be opened when actuated. Specifically, the depth of cavity 133 is related to the size of pressure relief mechanism 121. As an embodiment of the present application, the depth of the cavity 133 is greater than 5mm in the lamination 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, thereby further facilitating 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 lamination direction of the first plate body 131 and the second plate body 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 of the first through holes 1311 corresponds to a plurality of battery cells 12, in other words, the pressure release mechanisms 121 of the plurality of battery cells 12 correspond to one of the first through holes 1311, and when the pressure release mechanisms 121 of the plurality of battery cells 12 are opened, the discharged material enters the cavity 133 from the corresponding one of the first through holes 1311.

Referring to fig. 12, each of the first through holes 1311 corresponds to one of the battery cells 12.

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

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

Referring to fig. 10 and 11, according to some embodiments of the present application, the battery 10 further includes a case 11, a partition member 13 is disposed in the case 11 and divides an inner space of the case 11 into an electric cavity 11a and a collection cavity 11b, the electric cavity 11a is used to accommodate a plurality of battery cells 12, and the collection cavity 11b is used to collect emissions of the battery cells 12 when the pressure release mechanism 121 is actuated. The explosion proof area 1321 is configured to be broken upon actuation of the pressure relief mechanism 121 to allow the effluent of the battery cell 12 to pass through the explosion proof area 1321 into the collection chamber 11b.

In some embodiments, the first plate 131 is attached to and fixedly connected with 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 to the inner wall of the case 11.

The electric chamber 11a is for accommodating a plurality of battery cells 12. The electrical chamber 11a may be sealed or unsealed. The electrical chamber 11a provides a mounting space for the battery cell 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 electric chamber 11a may be determined according to the plurality of battery cells 12 received. In some embodiments, the electrical cavity 11a may be square with six walls. Since the battery cells 12 within the electrical cavity 11a form a higher voltage output through electrical connection, the electrical cavity 11a may also be referred to as a "high voltage cavity".

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

In some embodiments, the isolation member 13 is employed to isolate the electrical chamber 11a from the collection chamber 11b. That is, the electric chamber 11a accommodating the plurality of battery cells 12 is separated from the collection chamber 11b collecting the discharged matter. In this way, upon actuation of the pressure release mechanism 121, the effluent of the battery cell 12 enters the cavity 133 from the first through hole 1311 and passes through the explosion-proof area 1321 and into the collection chamber 11b without entering or with a small amount into the electrical chamber 11a, so that the electrical connection in the electrical chamber 11a is not affected, and the reliability of the battery 10 can be improved.

The electric cavity 11a accommodating the battery cell 12 is separated from the collection cavity 11b collecting the discharge by the isolating member 13, and when the pressure release mechanism 121 is actuated, the discharge of the battery cell 12 enters the collection cavity 11b after buffering by the cavity 133 without or with a small amount of entering the electric cavity 11a, so that the electric connection in the electric cavity 11a is not affected, and thus the reliability of the battery 10 can be improved.

Referring to fig. 10 and 11, according to some embodiments of the present application, the battery 10 further includes a sensing alarm 14, wherein the sensing alarm 14 is disposed in the housing 11 and is configured to emit an alarm signal when the concentration of the emissions is detected to be greater than a threshold value.

In some embodiments, the sensing and warning device 14 may be a temperature warning device, which emits a warning signal when the hot gas of the exhaust 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, it means that the concentration of the exhaust is greater than a threshold value. In some embodiments, the sensing alarm 14 may be a smoke alarm that sounds an alarm when the concentration of smoke in the emissions is greater than a threshold value.

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

The sensing alarm device 14 sends out an alarm signal when detecting that the concentration of the discharged materials is larger than the threshold value, so that a user can be timely reminded of intervening the battery 10, and the risk of safety accidents caused by explosion of the battery 10 can be reduced to a certain extent.

Referring to fig. 10 and 11, the induction alarm device 14 is disposed in the electric 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, please refer 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 actuated. When the pressure release mechanism 121 is actuated, the high-temperature and high-pressure gas in the discharged material will first impact the explosion-proof area 1321 located on the second plate 132, and under the action of a larger impact force, the explosion-proof area 1321 will be broken, and most of the high-temperature and high-pressure gas, electrolyte, dissolved or split positive and negative pole pieces, fragments of the isolating membrane and the like in the discharged material will enter the collecting cavity 11b to collect. While a portion of the emissions previously entering the cavity 133 may be buffered within the cavity 133 when the burst region 1321 is not breached, a small portion of the hot gases in the emissions enter the electrical cavity 11a through the second port 1312 to trigger the inductive alarm device 14 to alarm.

For the battery 10 with the induction alarm device 14 arranged in the electric cavity 11a, when the pressure release mechanism 121 is actuated, most of the emissions of the battery cell 12 enter the collecting cavity 11b after buffering in the cavity 133, and a small part of the emissions pass through the second through hole 1312 to trigger the induction alarm device 14, so that the timeliness of the induction alarm device 14 sending an alarm signal can be improved.

According to some embodiments of the present application, there is further provided a powered device, including the battery 10 according to any of the above aspects, where the battery 10 is configured to provide electrical energy.

Referring to fig. 4, 8 and 9, the present application provides an isolation component 13, where the isolation component 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 portion of the second plate 132 forming the cavity 133 is provided with an explosion-proof area 1321 for hot air burst. The explosion-proof area 1321 is the whole of the wall surface of the second plate 132 forming the cavity 133. The first through holes 1311 are provided in at least two, and the cavities 133 are provided in at least one, each cavity 133 being in communication with a plurality of the 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 lamination direction of the first plate body 131 and the second plate body 132. The 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 passage 134 for accommodating a heat exchange medium is formed between the first plate body 131 and the second plate body 132, and the cavity 133 and the flow passage 134 are independent from each other. The side of the second plate 132 facing the first plate 131 is provided with a second groove 1323, and the first plate 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. The hot air enters the cavity 133 through the first through hole 1311, and the hot air previously entering the cavity 133 can be buffered in the cavity 133 when the explosion-proof area 1321 is not broken, and most of the hot air is discharged out of the isolation member 13 through the second plate 132 after the explosion-proof area 1321 is broken by the hot air.

Referring to fig. 4 and 8-11, a battery 10 is provided, and includes a plurality of battery cells 12, an isolation member 13, and a case 11, wherein the battery cells 12 include a pressure release mechanism 121. The isolation member 13 includes a first plate body 131 and a second plate body 132, and the first plate body 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 portion of the second plate 132 forming the cavity 133 is provided with an explosion-proof area 1321 for hot air burst. The explosion-proof area 1321 is the whole of the wall surface of the second plate 132 forming the cavity 133. The first through holes 1311 are provided in at least two, and the cavities 133 are provided in at least one, each cavity 133 being in communication with a plurality of the 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 lamination direction of the first plate body 131 and the second plate body 132. The 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 passage 134 for accommodating a heat exchange medium is formed between the first plate body 131 and the second plate body 132, and the cavity 133 and the flow passage 134 are independent from each other. The side of the second plate 132 facing the first plate 131 is provided with a second groove 1323, and the first plate 131 covers the second groove 1323 to form the flow passage 134.

The first plate 131 is thermally connected to the plurality of battery cells 12 to regulate the temperatures 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 release mechanism 121 is disposed opposite to the first through hole 1311. Each of the first through holes 1311 corresponds to one of the battery cells 12, and the isolation member 13 is disposed in the case 11 and divides the inner space of the case 11 into an electric chamber 11a for accommodating a plurality of battery cells 12 and a collection chamber 11b for collecting the discharge of the battery cells 12 when the pressure release mechanism 121 is actuated. The explosion proof area 1321 is configured to be broken upon actuation of the pressure relief mechanism 121 to allow the effluent of the battery cell 12 to pass through the explosion proof area 1321 into the collection chamber 11b.

The battery 10 further comprises a sensing alarm 14, the sensing alarm 14 being arranged in the electric chamber 11a for emitting an alarm signal when the concentration of the emissions is detected to be greater than a threshold value. 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.

Upon actuation of the pressure relief mechanism 121 of the cell 12, the exhaust has a first through hole 1311 into the cavity 133 and a portion of the hot gases in the exhaust enter the electrical cavity 11a from the second through hole 1312 triggering the sensing alarm device 14 to alarm. Where the vent does not rupture the burst region 1321, the vent may be buffered within the cavity 133, and when the burst region 1321 is ruptured, a majority of the vent passes through the second panel 132 and into the collection chamber 11b for collection, in some embodiments, a pressure relief valve may also be provided on the collection chamber 11b for venting the pressure within the battery 10.

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

Claims

1. A battery, comprising:

a case;

the battery unit comprises a pressure release mechanism;

the isolating component is arranged in the box body and divides the inner space of the box body into an electric cavity and a collecting cavity, the electric cavity is used for containing the plurality of battery monomers, the collecting cavity is used for collecting the emissions of the battery monomers when the pressure relief mechanism is actuated, the isolating component is in heat conduction connection with the plurality of battery monomers so as to regulate the temperature of the plurality of battery monomers, the isolating component comprises a first plate body and a second plate body, 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, each first through hole corresponds to one battery monomer, the second plate body forms part of the cavity with an explosion-proof area used for heat supply gas breakage, and the explosion-proof area is configured to be destroyed when the pressure relief mechanism is actuated so that the emissions of the battery monomers can pass through the explosion-proof area and enter the collecting cavity;

The first plate body is located between the plurality of battery monomers and the second plate body, the pressure relief mechanism is arranged opposite to the first through holes, at least two first through holes are formed, at least one cavity is formed, and each cavity is communicated with a plurality of first through holes.

2. The battery of claim 1, wherein the explosion-proof area has a melting point T that satisfies: t is less than or equal to 800 ℃.

3. The battery of claim 1, wherein the explosion-proof area has a thickness D that satisfies: d is more than 0mm and less than or equal to 2mm.

4. The battery of claim 1, wherein at least a portion of the explosion-proof area is directly opposite the first through hole.

5. The battery of claim 4, wherein the explosion-proof area is an entirety of a wall surface of the second plate body forming the cavity.

6. The cell of claim 1, wherein a minimum distance between adjacent first through holes is W, satisfying 5mm +.w+.30 mm.

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

8. The battery according to claim 1, wherein the cavity has a dimension H in the lamination 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.

9. The battery according to claim 1, wherein 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 the cavity.

10. The battery according to claim 1, wherein a flow passage for accommodating a heat exchange medium is formed between the first plate body and the second plate body, and the cavity is independent of the flow passage.

11. The battery according to claim 10, 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.

12. The battery of claim 1, wherein the second plate is fixedly attached to the first plate.

13. The battery of claim 1, further comprising a sensing alarm disposed within the housing for emitting an alarm signal when the concentration of the emissions is detected to be greater than a threshold.

14. The battery of claim 13, wherein the induction 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.

15. A powered device comprising a battery as claimed in any one of claims 1 to 14, the battery being arranged to provide electrical energy.