CN213026307U

CN213026307U - Battery, device comprising battery and equipment for preparing battery

Info

Publication number: CN213026307U
Application number: CN202021358103.2U
Authority: CN
Inventors: 曾毓群; 曾智敏; 吴凯; 陈兴地; 王鹏; 孙占宇
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-04-20
Anticipated expiration: 2030-07-10

Abstract

A battery, an apparatus including the battery, and an apparatus for manufacturing the battery are disclosed. The battery includes a cell including a pressure relief mechanism configured to actuate to relieve an internal pressure or temperature of the cell when the internal pressure or temperature reaches a threshold; and an attachment member adapted to be attached to the battery cell by an adhesive; and a spacer member configured to prevent the adhesive from being applied between the attachment member and the pressure relief mechanism. By providing the spacer member, it is possible to prevent an adhesive from being applied between the attachment member and the pressure relief mechanism in an efficient manner during the production of the battery. Meanwhile, the application efficiency and accuracy of the adhesive can be improved, and therefore the production efficiency of the battery is improved.

Description

Battery, device comprising battery and equipment for preparing battery

Technical Field

The application relates to the field of batteries, in particular to a battery, a device comprising the battery and equipment for preparing the battery.

Background

Chemical batteries, electrochemical cells or electrochemical cells refer to devices that convert chemical energy of positive and negative active materials into electrical energy through a redox reaction. Unlike the conventional redox reaction, the oxidation and reduction reactions are separately performed, the oxidation is performed at the negative electrode, the reduction is performed at the positive electrode, and the electron gain and loss are performed through an external circuit, so that current is generated. This is an essential feature of all batteries. Through long-term research and development, chemical batteries come to a situation of various varieties and wide application. Large enough to accommodate the vast devices available, small enough to be of the type in millimeters. The development of modern electronic technology puts high demands on chemical batteries. Each breakthrough in chemical battery technology has brought about the revolutionary development of electronic devices. Research and development interests of many electrochemical scientists in the world are focused on the field of chemical batteries used as power of electric automobiles.

The lithium ion battery is used as one of chemical batteries, has the advantages of small volume, high energy density, high power density, more recycling times, long storage time and the like, is widely applied to some electronic equipment, electric vehicles, electric toys and electric equipment, and is widely applied to 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 at present.

With the continuous development of lithium ion battery technology, higher requirements are put forward on the performance of the lithium ion battery, and the lithium ion battery is expected to simultaneously consider various design factors, wherein the safety performance of the lithium ion battery is particularly important.

SUMMERY OF THE UTILITY MODEL

The present application provides a battery, an apparatus including the battery, and an apparatus for manufacturing the battery to improve safety performance of the battery.

According to a first aspect of the present application, there is provided a battery comprising a cell having electrode terminals, and comprising a pressure relief mechanism configured to be actuated to relieve an internal pressure or temperature of the cell when the internal pressure or temperature reaches a threshold value; and an attachment member adapted to be attached to the battery cell by an adhesive; and a spacer member configured to prevent the adhesive from being applied between the attachment member and the pressure relief mechanism.

By providing the spacer member, it is possible to prevent an adhesive from being applied between the attachment member and the pressure relief mechanism in an efficient manner during the production of the battery. Meanwhile, the application efficiency and accuracy of the adhesive can be improved, and therefore the production efficiency of the battery is improved.

In some embodiments, the pressure relief mechanism has an actuation region, and the pressure relief mechanism is configured to form a vent channel in the actuation region for venting the internal pressure when the internal pressure or temperature of the battery cell reaches a threshold value.

The vent channel formed in the actuating area when the pressure relief mechanism is actuated can guide the single battery discharge to be discharged outwards through the formed vent channel under the condition that the battery is in thermal runaway, so that the safety performance of the battery is improved.

In some embodiments, the isolation member is configured to surround at least the actuation area to prevent the adhesive from entering the actuation area.

The spacer member arranged specifically in this way can more reliably prevent the adhesive from interfering with the normal actuation of the pressure relief mechanism when the internal pressure or temperature of the battery cell reaches a threshold value, and prevent the adhesive from flowing into to block the vent channel and thus the discharge of the effluent discharged from the battery cell. This can further improve the safety performance of the battery.

In some embodiments, the isolation component has a body and a protrusion disposed to protrude from a surface of the body, the protrusion is disposed to correspond to a position of the actuation area of the pressure relief mechanism, and the protrusion is configured to surround at least the actuation area to prevent the adhesive from entering the actuation area.

This arrangement prevents adhesive from being applied to the surface of the pressure relief mechanism during the production of the battery in a simple and effective manner, thereby causing an obstruction to the pressure relief mechanism upon actuation. Moreover, the arrangement can be flexibly designed into a separation part according to actual needs, wherein the single separation part can realize the effect of separating the adhesive for the actuating areas of the pressure relief mechanisms by a plurality of bulges respectively. This helps to reduce production costs.

In some embodiments, the attachment member includes an avoidance structure configured to provide a space that allows actuation of the pressure relief mechanism, and wherein an avoidance cavity is formed between the avoidance structure and the pressure relief mechanism.

The arrangement of the avoiding structure can more reliably ensure an operation space or an action space required by effective actuation of the pressure relief mechanism, and in addition, the avoiding cavity can provide a buffer space for the emission of the single battery, so that the impact pressure of the emission of the single battery on an external structure or a component is reduced, and the safety performance of the battery is further improved.

In some embodiments, the isolation member is configured to surround at least a periphery of a side of the relief cavity facing the pressure relief mechanism to prevent the adhesive from entering the relief cavity.

The isolation component which is arranged in a targeted mode can more reliably ensure that an operation space or an action space which is provided by the avoidance cavity and is required by the effective actuation of the pressure relief mechanism is not partially occupied by the adhesive, so that the normal actuation of the pressure relief mechanism is influenced, and meanwhile, the avoidance cavity can play a role of providing a buffer space when the emission is discharged from the battery monomer.

In some embodiments, the isolation component has a main body and a protrusion protruding from the surface of the main body, the protrusion is arranged corresponding to the position of the avoiding cavity, and the protrusion is configured to surround at least the periphery of the side of the avoiding cavity facing the pressure relief mechanism so as to prevent the adhesive from entering the avoiding cavity.

This arrangement prevents adhesive from being applied to the bypass cavity in a simple and effective manner during the production of the battery, so that the bypass cavity does not provide the operating space required for effective actuation of the pressure relief mechanism. Moreover, the arrangement can be flexibly designed into the isolation component according to actual needs, wherein a single isolation component can be respectively covered on a plurality of avoidance cavities by a plurality of protrusions to achieve the effect of isolating the adhesive, and the production cost is reduced.

In some embodiments, the height of the protrusion is greater than or equal to a predetermined application height of the adhesive, and is configured to be compressed to conform to the height of the adhesive with the battery cell attached to the attachment member.

This arrangement ensures that the projection can effectively prevent adhesive from being applied between the attachment part and the pressure relief mechanism. At the same time, this makes it possible for the spacer component not to interfere with a reliable adhesion between the attachment component and the pressure relief mechanism and with the actuation of the pressure relief mechanism. Also, when the battery cell and the attachment member of the battery are adhesively bonded or joined by the adhesive coated by the adhesive surface, the protrusions can be compressed to a height in accordance with the adhesive, whereby the protrusions will not leave any space between the adhesive surfaces of both the battery cell and the attachment member of the battery, and it is possible to ensure with extreme reliability that the adhesive is isolated from the area where the pressure relief mechanism is actuated and forms the passage of the discharge.

In some embodiments, the protrusions are formed on the surface of the body using a blister process.

By using the blister process, the required spacer elements can be manufactured relatively easily and at low cost, and particularly for forming a plurality of protrusions on a single spacer element, it is particularly advantageous and economical to form the protrusions on the basis of a sheet or film by using the blister process.

In some embodiments, the isolation component is configured to be destroyed by emissions from the battery cell when actuated by the pressure relief mechanism.

Therefore, the isolation component can be damaged by the effluent flowing out along with the actuation of the pressure relief mechanism under the condition that the battery cell is in thermal runaway, so that a channel for the effluent to flow out is formed, and the safety of the battery can be improved.

In some embodiments, the isolation member is made of a thermoplastic material having a melting point no greater than the discharge temperature of the emissions.

The design can enable the isolation component to have relatively high structural strength under the general use condition that the thermal runaway of the battery cell does not occur, and meanwhile, the isolation component can be damaged by high-temperature and high-pressure emissions within relatively short time under the emergency condition that the thermal runaway of the battery cell occurs, so that the emissions can be discharged from the battery cell quickly.

In some embodiments, the isolation component includes a coating for preventing the adhesive from being applied thereto. Thus, the spacer member can also be realized by a structure having no projection.

In some embodiments, the attachment member includes a thermal management member for containing a fluid to cool the battery cells. Through setting up thermal management part, can control the free temperature of battery more nimble initiatively, reduce the free thermal runaway risk of battery.

In some embodiments, the bypass structure is formed in the thermal management component and includes a bypass bottom wall and a bypass sidewall surrounding the bypass cavity. This arrangement enables the design of the thermal management component and the bypass structure in a simple manner and at a low cost, and integrating the bypass structure into the thermal management component helps to reduce the space usage, which in turn helps to increase the energy density of the battery.

In some embodiments, the bypass sidewall is configured to break upon actuation of the pressure relief mechanism, thereby allowing the fluid to exit.

This arrangement enables the fluid to flow out when necessary at low cost and in a simple manner, thereby rapidly lowering the temperature of the exhaust from the battery cell in the event of thermal runaway using the fluid, further improving the safety performance of the battery.

According to a second aspect of the present application there is provided an apparatus comprising a battery as described above in relation to the first aspect for providing electrical energy to the apparatus.

According to a third aspect of the present application, there is provided an apparatus for manufacturing a battery, the apparatus including a cell manufacturing module for manufacturing a plurality of battery cells, each of the plurality of battery cells having an electrode terminal, and at least one of the plurality of battery cells including: a pressure relief mechanism configured to be actuatable to relieve an internal pressure or temperature of the battery cell when the internal pressure or temperature reaches a threshold value; an attachment member preparation module for preparing an attachment member adapted to be attached to the battery cell by an adhesive; an isolation member preparation module for preparing an isolation member configured to prevent the adhesive from being applied between the attachment member and the pressure relief mechanism; and a fitting module for fixedly mounting the spacer member with respect to the battery cell or the attachment member, and applying the adhesive to attach the battery cell to the attachment member.

Drawings

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

FIG. 1 illustrates a schematic structural view of some embodiments of a vehicle employing a battery of the present application;

fig. 2 illustrates an exploded schematic view of a battery cell according to some embodiments of the present application;

fig. 3 illustrates a perspective view of a battery cell according to some embodiments of the present application;

fig. 4 illustrates a perspective view of a battery cell according to some embodiments of the present application;

fig. 5 illustrates an exploded schematic view of a battery according to some embodiments of the present application;

fig. 6 illustrates an exploded schematic view of a battery according to some embodiments of the present application;

fig. 7 illustrates a cross-sectional view of a battery according to some embodiments of the present application;

fig. 8 shows an enlarged view of a portion B of the battery shown in fig. 7;

FIG. 9 illustrates a perspective view of an isolation member according to some embodiments of the present application;

FIG. 10 illustrates an exploded view of an isolation component not yet attached to a thermal management component according to some embodiments of the present application;

FIG. 11 illustrates an exploded view of an isolation component having been attached to a thermal management component according to some embodiments of the present application;

FIG. 12 illustrates a top view of a thermal management component according to some embodiments of the present application;

FIG. 13 illustrates a cross-sectional view A-A of the thermal management component of the present application illustrated in FIG. 12;

FIG. 14 illustrates a bottom view of the thermal management component of the present application illustrated in FIG. 12;

fig. 15 shows a schematic structural view of some embodiments of an apparatus for manufacturing a battery according to the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings showing a plurality of embodiments according to the present application, and it should be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments described herein without undue experimentation, shall fall within 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 in the description of the application in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising," "including," "having," "containing," and the like in the description and claims of this application and in the description of the foregoing figures are open-ended terms. Thus, an apparatus that "comprises," "has" one or more steps or elements, for example, has one or more steps or elements, but is not limited to having only those one or more elements. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different elements and not for describing a particular sequential or chronological order. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be understood that the terms "central," "lateral," "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings and are used merely for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application.

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

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

As noted above, it should be emphasized that the term "comprises/comprising" when used in this specification is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps, components or groups thereof. As used in this application, the singular forms "a", "an" and "the" include the plural forms as well, unless the context clearly indicates otherwise

The terms "a" and "an" in this specification may mean one, but may also be consistent with the meaning of "at least one" or "one or more". The term "about" generally means plus or minus 10%, or more specifically plus or minus 5%, of the numerical value referred to. The term "or" as used in the claims means "and/or" unless it is expressly stated that it refers only to alternatives.

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

The batteries referred to in the art may be classified into disposable batteries and rechargeable batteries according to whether they are rechargeable or not. Disposable batteries (Primary batteries) are commonly referred to as "disposable" batteries and galvanic cells because they are not rechargeable after their charge is exhausted and can only be discarded. The rechargeable Battery is also called Secondary Battery (Secondary Battery) or Secondary Battery, accumulator. The rechargeable battery is made of different materials and different from the disposable battery in manufacturing process, and has the advantages that the rechargeable battery can be recycled after being charged, and the output current load capacity of the rechargeable battery is higher than that of most disposable batteries. Types of rechargeable batteries that are common today are: lead-acid batteries, nickel-metal hydride batteries, and lithium ion batteries. The lithium ion battery has the advantages of light weight, large capacity (the capacity is 1.5-2 times of that of a nickel-hydrogen battery with the same weight), no memory effect and the like, and has very low self-discharge rate, so the lithium ion battery is still widely applied even if the price is relatively high. Lithium ion batteries are also used in pure electric vehicles and hybrid electric vehicles, and the lithium ion batteries used for such purposes have relatively low capacity, but have large output and charging currents, and some have long service lives, but have high cost.

The battery described in the embodiments of the present application refers to a rechargeable battery. The concept of the present application will be described below mainly with respect to a lithium ion battery as an example. It should be understood that any other suitable type of rechargeable battery is suitable. Reference to a battery in embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, the battery referred to in the present application may include a battery module or a battery pack, etc. The battery monomer comprises a positive pole piece, a negative pole piece, electrolyte and an isolating membrane, and is a basic structural unit for forming a battery module and a battery pack. The battery cells are generally divided into three types in an encapsulation manner: the battery pack comprises a cylindrical battery monomer, a square battery monomer and a soft package battery monomer.

The lithium ion battery monomer mainly depends on the movement of lithium ions between the positive pole piece and the negative pole piece to work. Lithium ion battery cells use an intercalated lithium compound as an electrode material. The main common positive electrode materials currently used for lithium ion batteries are: lithium cobalt oxide (LiCoO)₂) Lithium manganate (LiMn)₂O₄) Lithium nickelate (LiNiO)₂) And lithium iron phosphate (LiFePO)₄). And a separation film is arranged between the positive pole piece and the negative pole piece to form a film structure with three layers of materials. The membrane structure is generally manufactured into an electrode assembly of a desired shape by winding or stacking. For example, the film structure of three layers of materials in a cylindrical battery cell is wound into an electrode assembly having a cylindrical shape, and the film structure in a square battery cell is wound or stacked into an electrode assembly having a substantially rectangular parallelepiped shape.

A plurality of battery cells may be connected in series and/or in parallel via electrode terminals to be applied to various applications. In some high power applications, such as electric vehicles, the application of batteries includes three levels: battery monomer, battery module and battery package. The battery module is formed by electrically coupling a certain number of battery cells together and putting them in a frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery pack is the final state of the battery system installed in the electric vehicle. Most of the current battery packs are manufactured by mounting various control and protection systems such as a Battery Management System (BMS), a thermal management part, etc. on one or more battery modules. As technology develops, this level of battery modules may be omitted, i.e., battery packs are formed directly from battery cells. The improvement leads the weight energy density and the volume energy density of the battery system to be improved, and simultaneously, the number of parts is obviously reduced. The battery referred to in this application includes a battery module or a battery pack.

For cells, the main safety hazard arises from the charging and discharging process, and in order to effectively avoid unnecessary risks and losses, at least three protective measures are generally provided for 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 switching element is an element that can stop charging or discharging the battery when the temperature or resistance in the battery cell reaches a certain threshold value. The isolating film is used for isolating the positive pole piece and the negative pole piece, and can automatically dissolve the micro-scale (even nano-scale) micropores attached to the isolating film when the temperature rises to a certain value, so that lithium ions cannot pass through the isolating film, and the internal reaction of the battery monomer is stopped.

A pressure relief mechanism refers to an element or component that can be actuated to vent internal pressure and/or internal contents when the internal pressure or internal temperature of the battery cell reaches a predetermined threshold. The pressure relief mechanism may specifically take the form of, for example, an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and may specifically employ a pressure-sensitive or temperature-sensitive element or configuration, that is, when the internal pressure or temperature of the battery cell reaches a predetermined threshold, 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 can be released. The threshold referred to in this application may be a pressure threshold or a temperature threshold, the design of which may vary according to design requirements, for example, the threshold may be designed or determined according to internal pressure or internal temperature values of the battery cells considered to be at risk of danger or runaway. And, the threshold value may depend on, for example, the material used for one or more of the positive electrode tab, the negative electrode tab, the electrolyte, and the separator in the battery cell.

As used herein, "activate" means that the pressure relief mechanism is activated or activated to a state such that the internal pressure of the battery cell is vented. The actions generated by the pressure relief mechanism may include, but are not limited to: at least a portion of the pressure relief mechanism ruptures, fractures, is torn or opened, or the like. When the pressure relief mechanism is actuated, high-temperature and high-pressure substances in the battery cells are discharged outwards from the actuated part as emissions. In this way, the cells can be vented under controlled pressure or temperature, thereby avoiding potentially more serious accidents. Reference herein to emissions from the battery cell includes, but is not limited to: electrolyte, dissolved or split anode and cathode pole pieces, fragments of a separation film, high-temperature and high-pressure gas generated by reaction, flame and the like. The high-temperature and high-pressure discharge is discharged toward the direction in which the pressure relief mechanism is provided, and more specifically, toward the region in which the pressure relief mechanism is actuated, and the power and destructive power of such discharge may be large, and may even be sufficient to break through one or more structures such as the lid body or the like in that direction.

In some conventional solutions, the pressure relief mechanism is typically disposed on the cover plate of the battery cell. In some improved technical solutions, the pressure relief mechanism may also be arranged on the housing structure on other sides or in other directions on the battery cell. However, regardless of the arrangement or position of the pressure relief mechanism, the battery cell is attached or assembled to the attachment member by an adhesive (also referred to as an adhesive or bonding agent) using a suitable attachment member disposed in the battery, wherein the attachment member may specifically include an attachment member such as a thermal management member, a support member, and the like in the battery, and the adhesive may be, for example, a thermally conductive silicone adhesive, an epoxy adhesive, a polyurethane adhesive, and the like.

It is to be understood that the support member referred to in this application may then generally be understood as a member for providing a support effect to the battery cell or resisting the effect of gravity of the battery cell, which may generally be attached, such as to a bottom wall or bottom of a housing of the battery cell, to support or secure the battery cell thereto. The thermal management component is a component for containing a fluid to adjust the temperature of the battery cell, where the fluid may be a liquid or a gas, and the adjustment of the temperature refers to heating or cooling the battery cell. Typically, the thermal management component for cooling the battery cells may also be referred to as a cooling component, a cooling system or a cooling plate, etc., which contains a cooling medium, such as a cooling liquid or a cooling gas, wherein the cooling medium may be designed to circulate for better temperature regulation. The cooling medium may be water, a mixture of water and glycol, air, or the like. The attachment means generally refers to the part of the battery that is bonded to the battery cell by an adhesive, and as previously mentioned, the attachment means may be provided by or consist of a thermal management or support means, but in addition to this, the attachment means may be provided by any other suitable means in the battery.

Regardless of which part of the battery is used as the attachment member, such a manner of assembling the battery cell into the battery using the adhesive is generally to apply or apply the adhesive to the attachment member and the adhesive surface of the battery cell attached to each other, and then to bond the battery cell and the corresponding adhesive surface of the attachment member together in a surface-adhesive manner using the adhesive force and the cohesive force generated after the adhesive is cured, thereby achieving the purpose of assembling the battery cell to the attachment member. This design and its manner of manufacture has found wide application due to its ease of implementation, simplicity of processing, low cost, and secure and reliable attachment.

However, the present inventors have conducted extensive studies and experiments and have found that the above widely adopted design of the attachment member for attaching the battery cell to the battery using the adhesive may unexpectedly have an adverse effect on the design of the above pressure release mechanism intended to provide a reliable guarantee of the safety of use of the battery cell.

Specifically, on the one hand, when the adhesive is applied, there is a possibility that a part of the adhesive flows into a region related to the actuation of the pressure relief mechanism due to, for example, an excessive amount of the adhesive being applied inadvertently in a certain region or due to a tilt of an adhesive surface to which the adhesive is applied, and in this case, if the flowing adhesive is not cleaned separately, the part of the adhesive after curing may adversely affect the actuation of the pressure relief mechanism, and may even block or partially block a passage or an opening for the outflow of the exhaust material formed when the pressure relief mechanism is actuated, thereby affecting the outflow of the exhaust material.

On the other hand, when the pressure relief mechanism in the battery cell is activated when the internal pressure or temperature of the battery cell reaches a predetermined threshold, the high-temperature and high-pressure substance inside the battery cell may be discharged outwards from the activated portion as an effluent, and at this time, the high-temperature and high-pressure effluent may cause, due to its own destructive force and/or high temperature during the discharge process, the adhesive previously coated on the adhesive surface near the location where the effluent passes through to melt and flow into a region related to the activation of the pressure relief mechanism, such as the activated portion of the pressure relief mechanism or a channel or an opening formed by the activation of the pressure relief mechanism for the effluent to flow out, thereby adversely affecting the discharge of the effluent.

In order to ensure that the pressure relief mechanism is able to perform its designed function to vent high temperature, high pressure emissions from the interior of the battery cell when necessary, it is desirable to somehow prevent the application of an adhesive, such as a thermally conductive silicone, in the area that may affect the actuation of the pressure relief mechanism or may affect the pressure relief mechanism to form an opening or channel for the outflow of emissions. However, to do so, the attachment member for assembling the battery cell into the battery is not applied with an adhesive, or a barrier structure is added around the adhesive surface of the battery cell or the attachment member to which the adhesive needs to be applied, which significantly increases the difficulty of manufacturing and manufacturing the battery and the production cost. Therefore, it is a difficult technical problem for researchers and those skilled in the art to solve how to ensure that the pressure relief mechanism provided in the battery cell can perform its design function to ensure the safety of the battery, and at the same time, to keep the processing and manufacturing difficulty and the production cost of the battery at a desired relatively low level.

To solve, or at least partially solve, the above problems and other potential problems with the prior art batteries, the present inventor has proposed a battery, and will hereinafter set forth in detail the design thereof. It is to be understood that the battery described in the embodiments of the present application is applicable to various devices using a battery, for example, mobile phones, portable devices, notebook computers, battery cars, electric automobiles, ships, spacecraft, electric toys, electric tools, and the like, for example, spacecraft including airplanes, rockets, space shuttle, and spacecraft, and the like, electric toys including stationary or mobile electric toys, for example, game machines, electric automobile toys, electric ship toys, and electric airplane toys, and the like, and electric tools including metal cutting electric tools, grinding electric tools, assembly electric tools, and electric tools for railways, for example, electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planes.

The battery described in the embodiments of the present application is not limited to be applied to the above-described devices, but may be applied to all devices using the battery.

For example, as shown in fig. 1, it is a simplified schematic diagram of a vehicle 1 according to an embodiment of the present application. The vehicle 1 can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range-extended automobile and the like. As shown in fig. 1, a battery 10 may be provided inside the vehicle 1, 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, and for example, the battery 10 may serve as an operation power source of the vehicle 1. And the vehicle 1 may further include a controller 30 and a motor 40. The controller 30 is used to control the battery 10 to supply power to the motor 40, for example, for operational power requirements at start-up, navigation, and travel 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. The battery 10 referred to hereinafter may also be understood as a battery pack including a plurality of battery cells 20.

As shown in fig. 2 to 4, the battery cell 20 includes a case 21, an electrode assembly 22, and an electrolyte, wherein the electrode assembly 22 is accommodated in the case 21 of the battery cell 20, and the electrode assembly 22 includes a positive electrode tab, a negative electrode tab, and a separator. The material of the isolation film can be PP or PE, etc. The electrode assembly 22 may be of a wound type structure or a laminated type structure. The cartridge 21 includes a housing 211 and a cover 212. The housing 211 includes an accommodation chamber 211a formed by a plurality of walls and an opening 211 b. The cover plate 212 is disposed at the opening 211b to close the accommodation chamber 211 a. The receiving cavity 211a receives electrolyte in addition to the electrode assembly 22. The positive and negative electrode tabs in the electrode assembly 22 will typically be provided with tabs, which typically include positive and negative tabs.

Specifically, the positive pole piece comprises a positive pole current collector and a positive pole active substance layer, wherein the positive pole active substance layer is coated on the surface of the positive pole current collector, the positive pole current collector which is not coated with the positive pole active substance layer protrudes out of the positive pole current collector which is coated with the positive pole active substance layer, the positive pole current collector which is not coated with the positive pole active substance layer is used as a positive pole lug, the positive pole current collector can be made of aluminum, and the positive pole active substance can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate and the like; the negative pole piece includes negative pole mass flow body and negative pole active substance layer, and the surface of negative pole mass flow body is scribbled to the negative pole active substance layer, and the negative pole mass flow body protrusion in the negative pole mass flow body of having scribbled the negative pole active substance layer of not scribbling the negative pole active substance layer, and the negative pole mass flow body of not scribbling the negative pole active substance layer is as negative pole utmost point ear. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon, silicon, or the like. In order to ensure that the fuse is not fused when a large current is passed, the number of the positive electrode tabs is multiple and the positive electrode tabs are stacked together, and the number of the negative electrode tabs is multiple and the negative electrode tabs are stacked together. The tabs are connected to a positive electrode terminal 214a and a negative electrode terminal 214b outside the battery cell 20 by a connection member 23. In the description of the present application, the positive electrode terminal 214a and the negative electrode terminal 214b are also collectively referred to as an electrode terminal 214. For a prismatic battery cell, as shown in fig. 2 and 4, the electrode terminal 214 may be generally disposed at a portion of the cap plate 212.

Fig. 5-6 illustrate exploded views of battery 10 according to some embodiments of the present application. As shown in fig. 5 to 6, the battery 10 may include a case 11 for enclosing the plurality of battery cells 20, and the case 11 may prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells 20, wherein the plurality of battery cells 20 are electrically connected to each other via the bus member 12, and the battery 10 may provide a higher voltage after the plurality of battery cells 20 are connected in series and in parallel via the bus member 12. The cabinet 11 may include a cover 111 and a housing 112. The cover 111 and the housing 112 may be hermetically combined together to jointly enclose the electrical cavity 11a for accommodating the plurality of battery cells 20, but may be combined with each other without being hermetically sealed. In some embodiments, the thermal management component 13 may form part of a case 11 for housing a plurality of battery cells 20. For example, the thermal management component 13 may constitute the side portion 112b of the case 112 of the case 11 or constitute a part of the side portion 112b, or as shown in FIG. 6, the thermal management component 13 may constitute the bottom portion 112a of the case 112 of the case 11 or constitute a part of the bottom portion 112 a. The use of the design in which the thermal management member 13 forms a part of the case 112 contributes to a more compact structure of the battery 10, an improved space-efficient utilization ratio, and an improved energy density.

In some alternative embodiments, the battery 10 may further include a protective member 115, as shown in fig. 6 and 7. The protective member 115 in the present application refers to a member disposed on a side of the thermal management member 13 away from the battery cell 20 to provide protection to the thermal management member 13 and the battery cell 20. In these embodiments, the collection cavity 11b may be disposed between the protective structure 115 and the thermal management component 13.

Referring to fig. 7-8, at least one cell 20 in the battery 10 includes a pressure relief mechanism 213. In some embodiments, each of the battery cells 20 in the battery 10 is provided with the pressure relief mechanism 213, or the pressure relief mechanism 213 may be provided on a part of the battery cells 20, where thermal runaway may be more likely to occur due to the position of the battery cell 20 in the battery 10 or the characteristics of other battery cells 20. The pressure relief mechanism 213 can be actuated to relieve the internal pressure of the battery cell 20 when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold.

The battery 10 also includes an attachment member adapted to attach to the battery cell 20 by an adhesive, which may be, for example, a thermal management member 13, a support member, or the like in the battery 10. In order to prevent an adhesive such as a thermally conductive silicone gel from being applied between the attachment part and the pressure relief mechanism 213 to prevent or affect the actuation of the pressure relief mechanism 213 and to exert its design function as described above, i.e., the function of actuating to form a passage or opening for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature of the battery cell 20 is large, the battery 10 may be further provided with a separation member 14, which separation member 14 can prevent the adhesive from being applied between the attachment part and the pressure relief mechanism 213. The following will mainly be exemplified with respect to an embodiment in which the attachment member is a thermal management member 13 and the design of the isolation member 14 referred to therein, it being understood that the substantially same or similar configuration or arrangement of the isolation member 14 may be applied for the case in which the attachment member is a support member.

The isolation member 14 is schematically depicted in fig. 8, the isolation member 14 enclosing at least the actuation area of the pressure relief mechanism 213 to prevent adhesive from entering the actuation area. In this way, it is possible to avoid any obstruction or adverse effect of the flow of adhesive into the actuation area from any direction on the performance of the actuation action of the pressure relief mechanism.

The separator 14 employed in the various embodiments of the present application may take various possible configurations so that the above-described adhesive used to assemble the battery cell 20 to the attachment member can be isolated from the space between the attachment member and the pressure relief mechanism 213, or so that the applied adhesive can be isolated from the space that, once the adhesive flows in, may affect the pressure relief mechanism 213 from performing its designed function of pressure relief. As will be seen in the following description of some preferred embodiments, the isolation member 14 may be designed to surround a partial region of the pressure relief mechanism 213, which can form a vent channel for venting the internal pressure of the battery cell 20 when the pressure relief mechanism 213 is actuated, for outflow of the exhaust (which may be referred to as an actuation region or a venting region), or may be attached to an attachment member such as the thermal management member 13 in a region corresponding to the pressure relief mechanism 213, so as to surround a space provided by the attachment member to allow actuation of the pressure relief mechanism 213 (e.g., the bypass structure 134 described below), and so on.

In some embodiments, the isolation component 14 may be attached to an attachment component, such as the thermal management component 13, in an area corresponding to the pressure relief mechanism 213 prior to application of the adhesive. It should be noted that, as long as any member of the battery that is bonded to the battery cell 20 by the adhesive may be considered as an attachment member or a part of the attachment member, the member may use the separator 14, i.e., the separator 14 may be attached thereto before the adhesive is applied. In this way, when the adhesive is applied, the spacer member 14 will be able to prevent the adhesive from entering the area on the attachment member corresponding to the pressure relief mechanism 213, in particular to the area on the pressure relief mechanism 213 for actuation to form a vent channel for venting the internal pressure of the cell for the effluent to flow out, thereby ensuring that the pressure relief mechanism 213 can actuate and properly perform its designed function. Further, the use of the spacer member 14 also makes it possible to increase the speed and accuracy of application of the adhesive without fear of applying the adhesive to the area associated with the actuation of the pressure release mechanism 213, and save the production time cost.

Fig. 9 illustrates a perspective view of an isolation member 14 according to some embodiments of the present application, fig. 10 illustrates an exploded view of the isolation member 14 and a thermal management member 13 as an example of an attachment member shown in fig. 9 when they are not assembled together, and fig. 11 illustrates a perspective view of the isolation member 14 and the thermal management member 13 shown in fig. 9 when they are attached together. According to the embodiment shown in fig. 9-11, the isolation component 14 may be attached to an attachment component, such as the thermal management component 13, prior to application of the adhesive, and such that a particular feature on the isolation component 14 corresponds at least to the pressure relief mechanism 213 or an avoidance structure 134 provided with the attachment component, wherein the avoidance structure 134 is capable of providing space to allow actuation of the pressure relief mechanism 213. The specific structure and features of the bypass structure 134 involved will be described in more detail below.

As shown in fig. 9-11, according to some preferred embodiments of the present application, the isolation member 14 may include a body 141 and a plurality of protrusions 142. Wherein the body 141 is adapted to be attached or fitted to an attachment component, such as the thermal management component 13. The protrusion 142 protrudes outward from a surface of the main body 141, and the protrusion 142 is arranged to be aligned in a protruding direction with the main body 141 attached to the attachment part, either the pressure relief mechanism 213 or a relief area of the pressure relief mechanism 213, or the relief structure 134 or the relief cavity 134a in some embodiments described below. Although in the example illustrated in fig. 10-11, the protrusion 142 is disposed in alignment with the bypass structure 134, it will be readily appreciated in conjunction with the illustration of fig. 8 that the bypass structure 134 itself is disposed in correspondence with the pressure relief mechanism 213 or in alignment with each other, and thus the protrusion 142 may also be considered in alignment with the pressure relief mechanism 213 or in alignment with the actuation region (or relief region) thereof. Still alternatively, in other embodiments not shown, such as in the example where the battery 10 is not provided with the bypass structure 134, the protrusion 142 may also be disposed in direct alignment with the pressure relief mechanism 213 or in alignment with an actuation region or a venting region thereof

It will be appreciated that the inclusion of the body 141 and the projection 142 in the spacer body 14 described herein is not intended to imply that the spacer body 14 must comprise separate components, and that the integral construction of both the body 141 and the projection 142 may be advantageous in a number of respects, as will be seen from the description of certain preferred embodiments below.

In the present application, the main body 141 may be understood as a portion of the insulating member 14 designed to be easily attached to an attachment member such as the support member or the thermal management member 13, and the protrusion 142 is designed to protrude from the surface of the main body 141, the outer circumferential dimension of the protrusion 142 is greater than or equal to the outer circumferential dimension of the pressure relief mechanism 213 or at least greater than or equal to the relief area of the pressure relief mechanism 213, and the height of the portion of the protrusion 142 that is protruded is advantageous in blocking the adhesive from entering the space between the pressure relief mechanism 213 and the attachment member when the adhesive is applied, for example, so as to prevent the flowing adhesive from interfering with the normal operation of the pressure relief mechanism 213. In this way, when applying the adhesive, it is possible to guide the applicator to perform the application operation in accordance with a predetermined path, on the one hand, and to ensure that the adhesive is not applied to the position of the pressure release mechanism 213, on the other hand, so that it is possible to ensure that the adhesive is applied to the proper position efficiently and accurately.

Although in the embodiment shown in fig. 9-11, the isolation member 14 is designed to have a long and narrow sheet-like main body 141 with a row of protrusions 142 protruding from each main body 141, it is understood that the main body 141 and the protrusions 142 in the present application may have various shapes depending on the shape, configuration, etc. of the pressure relief mechanism 213. The body 141 generally has a thin thickness in consideration of the gravimetric energy density or volumetric energy density of the battery, and thus the body 141 may generally take the form of various shapes of films or sheets. Typically, the wall thickness of the isolation member 14 or body 141 may be between 0.01mm and 0.05 mm. The shape of the protrusion 142 may be, for example, oblong or circular, oval, square, etc., as shown in the figures. Moreover, a single body 141 may be designed to have a single protrusion 142, multiple rows of protrusions 142, or multiple protrusions 142 arranged in other ways, as long as the arrangement and relative position of the protrusions 142 on the surface of the body 141 can be adapted to the arrangement position of the pressure relief mechanism 213 of the battery cell 20 in the battery.

According to some preferred embodiments, a single separation member 14 may be designed to include a main body 141 and a plurality of protrusions 142 protruding from a surface of the main body 141, the main body 141 is integrally attached to an attachment member of a battery, and in this attached state, the plurality of protrusions 142 are respectively aligned with the pressure relief mechanisms 213 (or the relief regions of the pressure relief mechanisms 213) of the plurality of battery cells 20 included in the battery 10 in a one-to-one correspondence, so that each protrusion 142 can respectively surround its aligned pressure relief mechanism 213 (or at least surround the relief regions of the pressure relief mechanisms 213). The process of fitting the separating member 14 to the attachment member of the battery will thus be simple, while the use of the plurality of projections 142 will in turn enable the applied or to be applied adhesive to be separated in a relatively independent manner outside the pressure relief mechanism 213 of the plurality of battery cells 20 contained in the battery, or the discharge area thereof. Also, this can assist the operator in properly completing the application of the adhesive with higher efficiency when applying the adhesive, so that the operator does not need to carefully perform the operation of applying the adhesive, which will contribute to a reduction in the assembly cost and production cost of the battery 10.

Based on the above, since the single separation member 14 can be designed to have the plurality of protrusions 142, this design is particularly advantageous for a typical battery type in which a plurality of battery cells 20 are accommodated in one battery 10 and in which the plurality of battery cells 20 are respectively provided with the pressure relief mechanisms 213, because the plurality of protrusions 142 will be able to function as the separation adhesive with respect to the pressure relief mechanisms 213 of the plurality of battery cells 20 in the state where the single separation member 14 is assembled in place.

In a battery 10 including a plurality of battery cells 20, the battery cells 20 may be generally attached to the attachment members of the battery 10 in a row. For this case, the separator 14 including the main body 141 and the protrusions 142 protruding from the surface of the main body 141 as described above may be used, the separator 14 may be an integrally formed integral sheet, and when the main body 141 of the separator 14 is attached to the attachment member of the battery 10, the protrusions 142 thereon may be aligned with the pressure relief mechanisms 213 of the plurality of battery cells 20 included in the battery, respectively, in a one-to-one correspondence. Alternatively, the plurality of separation members 14 for the plurality of battery cells 20 may also be integrally molded, wherein the positions of the plurality of separation members 14 arranged in a row correspond to the positions of the pressure relief mechanisms 213 of the plurality of battery cells 20, respectively. Thus, the assembly process of assembling the plurality of battery cells 20 to the battery 10 can be made simpler and more efficient.

According to some embodiments of the present application, as shown in fig. 8 and 10 and 12-13, previously mentioned, the attachment component, such as the thermal management component 13, may be provided with an avoidance structure 134 thereon, forming an avoidance cavity 134a between the avoidance structure 134 and the pressure relief mechanism 213, thereby providing a space to allow for actuation of the pressure relief mechanism 213, in which embodiments the isolation component 14 and the protrusions 142 therein will correspond to or be aligned with the arrangement of the avoidance structure 134 or the avoidance cavity 134 a.

Specifically, the evacuation chamber 134a may be, for example, a closed cavity collectively surrounded by the evacuation structure 134 and the pressure relief mechanism 213. In this case, with respect to the discharge of the discharge from the battery cell 20, the inlet-side surface of the escape cavity 134a may be opened by the actuation of the pressure relief mechanism 213, and the outlet-side surface opposite to the inlet-side surface may be partially broken by the discharge of the high-temperature and high-pressure, thereby forming a discharge passage for the discharge. According to other embodiments, the bypass cavity 134a may be, for example, a non-sealed cavity surrounded by the bypass structure 134 and the pressure relief mechanism 213, and the outlet side surface of the non-sealed cavity may have a channel for the outflow of the exhaust. As indicated by the arrows in the evacuation chamber 134a of fig. 8, the exhaust will be discharged generally outwardly in a fan-like direction.

According to some embodiments, as shown in fig. 12-14, the thermal management component 13 further includes an evacuation bottom wall 134b at the bottom of the evacuation cavity 134 and an evacuation side wall 134c surrounding the evacuation cavity 134 a. The bypass bottom wall 134b is the wall of the bypass cavity 134a opposite the pressure relief mechanism 213, and the bypass side wall 134c is the wall adjacent to and angled from the bypass bottom wall 134b to surround the bypass cavity 134a, wherein the angle formed by the bypass side wall 134c and the bypass bottom wall 134b may preferably be in the range of 105-175 °. The thermal management member 13 may also be provided with a flow channel 133 for containing a fluid, which may be a cooling medium, to enable cooling of the battery cells 20.

Accordingly, in these embodiments, the plurality of protrusions 142 of the isolation member 14 may be embodied in an arrangement as shown in fig. 10-11, wherein each protrusion 142 is capable of enclosing its aligned bypass cavity 134a, i.e., the protrusion 142 is substantially shrouded at or beyond the upper periphery of the bypass sidewall 134c of the corresponding bypass cavity 134 a. That is, the protrusions 142 of the isolation member 14 are caused to substantially cover the upper peripheral edge of the corresponding bypass cavity 134a, thereby isolating the applied or to-be-applied adhesive from the bypass structure 134 or the bypass cavity 134 a.

The thermal management member 13 and the separation member 14 according to the above preferred embodiment are very advantageous in improving the assembly efficiency of the battery. Wherein the process of assembling the separator 14 to the attachment member of the battery is simple, while the adhesive to be applied or applied can be isolated in a relatively independent manner by the plurality of protrusions 142 from the escape cavities 134a corresponding to the pressure relief mechanisms 213 of the plurality of battery cells 20 included in the battery. Thus, the pressure relief mechanism 213 of the battery cell 20 is prevented from being affected by the applied adhesive, thereby securing safe use of the battery. In addition, this also assists the operator in appropriately applying the adhesive with higher efficiency when applying the adhesive.

For example, in the embodiment shown in fig. 10-11, when a single elongated laminar main body 141 is assembled to the thermal management component 13 and in place, the 8 protrusions 142 on the main body 141 will cover their respective aligned 8 bypass structures 134 or cavities 134a, thereby preventing adhesive from entering the cavities 134 a. In other words, the isolation operation of the pressure relief member 213 for 8 or more number of the battery cells 20 can be achieved at one time of assembly of a single isolation member 14.

It should be understood that the arrangement direction and position of the pressure relief mechanism 213 in the battery cell 20 are not limited in the present application, and in fact, whether the pressure relief mechanism 213 is arranged at the lower part, the upper part, the side part, or the like of the battery cell 20, the related design of the isolation member 14 proposed in the present application may be suitably applied, and plays a beneficial role in ensuring that the pressure relief mechanism 213 performs its design function to discharge high-temperature and high-pressure exhaust in the battery cell when necessary, thereby ensuring safe use of the battery.

In some embodiments, as shown in fig. 12-14, the thermal management component 13 may be designed to have the following specific configuration. The thermal management component 13 may include a first heat conduction plate 131 and a second heat conduction plate 132, a groove structure corresponding to the flow channel 133 is formed on the second heat conduction plate 132, and a relief structure 134 is formed on the first heat conduction plate 131, and by assembling the first heat conduction plate 131 and the second heat conduction plate 132 together, for example, the first heat conduction plate 131 and the second heat conduction plate 132 may be assembled together by welding (e.g., soldering), so that the thermal management component 13 as described in the above embodiments may be formed. Of course, it is understood that this way of forming the heat management member 13 by assembling the first heat conduction plate 131 and the second heat conduction plate 132 is merely illustrative, and the formation of the heat management member 13 can be made in other suitable ways.

Among them, the flow channel 133 provided in the thermal management member 13 may be at least partially arranged around the bypass cavity 134, that is, the bypass side wall 134c partitions the flow channel 133 and the bypass cavity 134a, and a weak structure, which is easily damaged by, for example, emissions of high temperature and high pressure, may be provided on the bypass side wall 134 c. It should be understood that the weak structures referred to in this application may include, but are not limited to: a reduced thickness portion, a score (e.g., a cross-shaped score 134d as shown in fig. 10 and 12), a frangible portion made of a frangible material, or a frangible portion made of a lower melting point material, etc.

In this way, when the discharge from the battery cell 20 enters the bypass cavity 134a, the weak structure on the bypass side wall 134c is destroyed, so that the cooling medium such as cooling liquid in the flow channel 133 flows out to the bypass cavity 134a, and the cooling liquid contacts the high-temperature and high-pressure discharge from the battery cell 20 and absorbs a large amount of heat and is vaporized, so that the temperature and the pressure of the high-temperature and high-pressure discharge from the battery cell 20 are significantly reduced in a short time, and the other components such as the battery cell 20 and the like which are not subjected to thermal runaway in the battery 10 are protected. Moreover, since the plurality of protrusions 142 of the isolation member 14 substantially cover the upper periphery or the outside of the upper periphery of the bypass side wall 134c of the corresponding bypass cavity 134a, the design can cause the emission to damage the weak structure of the bypass side wall 134c and introduce the cooling medium, and simultaneously cause the isolation member 14 and the protrusions 142 thereof to still have a certain blocking effect on the adhesive such as the heat conductive silicone rubber positioned outside the isolation member, thereby improving the safety of the battery.

According to some preferred embodiments of the present application, the isolation member 14 and the protrusions 142 therein may employ one or more of the following specific designs, materials or manufacturing processes, and the isolation member 14 according to the following preferred examples may be applicable in principle to any of the above-described embodiments of the present application.

In some preferred embodiments, the height of the protrusion 142 in the isolation component 14 may be greater than or equal to the intended application height of the adhesive, which may ensure that no or a small amount of adhesive enters the area between the pressure relief mechanism 213 and the attachment component when the adhesive is applied, which may be advantageous, especially if an escape structure 134 is provided in the attachment component. Further, the protrusions 142 are also configured to be able to be compressed to conform to the height of the adhesive in a state where the battery cell 20 is attached to the attachment member, thereby ensuring the connection between the attachment member and the battery cell 20. Typically, the protrusion 142 may have a height slightly larger than a predetermined application height of the adhesive before the battery cell 20 is attached to the attachment part of the battery, and when the battery cell 20 and the attachment part of the battery are adhesively bonded or joined by the adhesive coated by the adhesive surface, simple bonding may cause the protrusion 142 to be compressed to a height corresponding to the adhesive by using the adhesive surfaces of the battery cell 20 and the attachment part of the battery that are substantially parallel to each other, and at this time, the protrusion 142 will not leave any gap between the adhesive surfaces of both the battery cell 20 and the attachment part of the battery, thereby ensuring that the adhesive is isolated from the area where the pressure relief mechanism 213 actuates and forms a passage for the exhaust.

In some preferred embodiments of the present application, the isolation member 14 may be made of a thermoplastic material by a blister process. This helps to simplify the manufacturing process of the partition member 14 and to reduce the cost, and it is particularly economical for the partition member 14 including one body 141 and a plurality of projections 142 to be formed by a blister process using a thermoplastic material, and it is possible to form the partition member 14 by forming the plurality of projections 142 on a sheet or a film made of a thermoplastic material, for example, by a blister process on the basis of one sheet or one sheet of the sheet or the film.

In some embodiments, the isolation member 14 is also made of a material that is susceptible to damage by emissions from the battery cells 20, thereby allowing the emissions to more easily break through the isolation member 14. Alternatively, the projection 142 or the entire isolation member 14 may be made of a material or structure that is susceptible to damage by high temperature and high pressure emissions or has a low penetration strength. According to some preferred embodiments, the protrusions 142 or the entire separator 14 may be made of a thermoplastic material having a melting point not greater than the discharge temperature of the emissions, thereby allowing the separator 14 to have a relatively high structural strength in a general use state in which thermal runaway of the battery cell 20 does not occur, while being reliably destroyed by the high-temperature and high-pressure emissions in a relatively short time in an emergency situation in which thermal runaway of the battery cell 20 occurs.

It will be appreciated that, in addition to the structure of the separation member 14 including the main body 141 and the projections 142 projecting from the surface of the main body 141 as described above, according to other embodiments, the separation member 14 may also adopt a structure without the projections 142, but a special coating layer, such as a thinning layer, for preventing an adhesive from being applied between the attachment member and the pressure relief mechanism 213 is provided at a position corresponding to the position where the projections 142 are provided in the above-described embodiments. In other words, in such an embodiment, the area coated with the gel-phobic layer covers at least the periphery of the side of each relief cavity 134a facing the corresponding pressure relief mechanism 213, or at least the actuation area or the relief area of the pressure relief mechanism 213.

Of course, according to other embodiments, on the basis of the isolation component 14 comprising the main body 141 and the protrusion 142 protruding from the surface of the main body 141, as described above, a gel-phobic layer may be further disposed on the surface of the protrusion 142 to more reliably isolate the adhesive from the actuation region where the pressure relief mechanism 213 actuates and forms a passage for the emissions or from the bypass cavity 134 a.

The battery according to the embodiment of the present application is described above with reference to fig. 1 to 14, and the apparatus for manufacturing a battery according to the embodiment of the present application will be described below with reference to fig. 15, wherein portions not described in detail may be referred to in the foregoing embodiments.

Specifically, fig. 15 shows a schematic block diagram of an apparatus 400 for manufacturing a battery according to an embodiment of the present application. As shown in fig. 15, an apparatus 400 according to some embodiments of the present application includes: a battery cell preparation module 401 for preparing a plurality of battery cells, each of the plurality of battery cells having an electrode terminal, and at least one of the plurality of battery cells including: a pressure relief mechanism configured to be actuatable to relieve an internal pressure of the battery cell when the internal pressure or temperature reaches a threshold value; an attachment member preparation module 402 for preparing an attachment member adapted to be attached to a battery cell by an adhesive; an isolation member preparation module 403 for preparing an isolation member configured to prevent an adhesive from being applied between the attachment member and the pressure relief mechanism; and a mounting module 404 for mounting and fixing the spacer member with respect to the battery cell or the attachment member, and applying an adhesive to attach the battery cell to the attachment member.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the above-described embodiments, or equivalents may be substituted for some of the features of the embodiments, without departing from the spirit or scope of the subject matter of the claims.

Claims

1. A battery (10), comprising:

a battery cell (20), the battery cell (20) having an electrode terminal (214), and the battery cell (20) comprising:

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

an attachment member adapted to be attached to the battery cell (20) by an adhesive; and

a spacer member (14), the spacer member (14) being configured to prevent the adhesive from being applied between the attachment member and the pressure relief mechanism (213).

2. The battery (10) of claim 1, wherein the pressure relief mechanism (213) has an actuation region, and wherein the pressure relief mechanism (213) is configured to form a vent channel in the actuation region for venting the internal pressure when the internal pressure or temperature of the battery cell (20) reaches a threshold value.

3. The battery (10) of claim 2, wherein the separator member (14) is configured to surround at least the actuation area to prevent the adhesive from entering the actuation area.

4. The battery (10) according to claim 2, wherein the separator (14) has a main body (141) and a protrusion (142) arranged to protrude from a surface of the main body (141), the protrusion (142) is arranged to correspond to a position of the actuation region of the pressure release mechanism (213), and the protrusion (142) is configured to surround at least the actuation region to prevent the adhesive from entering the actuation region.

5. The battery (10) according to claim 1, wherein the attachment member includes an avoidance structure (134), the avoidance structure (134) is configured to provide a space that allows actuation of the pressure relief mechanism (213), and,

wherein an evacuation chamber (134a) is formed between the evacuation structure (134) and the pressure relief mechanism (213).

6. The battery (10) according to claim 5, wherein the separator (14) is configured to surround at least a peripheral edge of a side of the bypass chamber (134a) facing the pressure relief mechanism (213) to prevent the adhesive from entering the bypass chamber (134 a).

7. The battery (10) according to claim 5, wherein the separator (14) has a main body (141) and a protrusion (142) arranged to protrude from a surface of the main body (141), the protrusion (142) is arranged to correspond to a position of the bypass chamber (134a), and the protrusion (142) is configured to surround at least a peripheral edge of a side of the bypass chamber (134a) facing the pressure relief mechanism (213) to prevent the adhesive from entering the bypass chamber (134 a).

8. The battery (10) according to claim 7, wherein the height of the protrusion (142) is greater than or equal to a predetermined application height of the adhesive, and is configured to be compressed to conform to the height of the adhesive with the battery cell (20) attached to the attachment member.

9. The battery (10) of claim 7, wherein the protrusions (142) are formed on the surface of the body (141) using a blister process.

10. The battery (10) of claim 1, wherein the isolation component (14) is configured to be destructible by emissions from the battery cell (20) when the pressure relief mechanism (213) is actuated.

11. The battery (10) of claim 10, wherein the separator member (14) is formed from a thermoplastic material having a melting point no greater than the discharge temperature of the effluent.

12. The battery (10) according to any one of claims 1 to 11, wherein the separator (14) comprises a coating for preventing the adhesive from being applied thereon.

13. Battery (10) according to any of claims 5-9, characterized in that the attachment means comprise a thermal management means (13) for containing a fluid to regulate the temperature of the battery cells (20).

14. The battery (10) of claim 13, wherein the bypass structure (134) is formed in the thermal management member (13), and the bypass structure (134) includes a bypass bottom wall (134b) and a bypass sidewall (134c) surrounding the bypass cavity (134 a).

15. The battery (10) of claim 14, wherein the bypass sidewall (134c) is configured to be broken upon actuation of the pressure relief mechanism (213) to allow the fluid to escape.

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

17. An apparatus for manufacturing a battery, comprising:

a battery cell preparation module for preparing a plurality of battery cells (20), each battery cell (20) of the plurality of battery cells (20) having an electrode terminal (214), and at least one battery cell (20) of the plurality of battery cells (20) comprising:

an attachment member preparation module for preparing an attachment member adapted to be attached to the battery cell (20) by an adhesive;

an isolation member preparation module for preparing an isolation member (14) configured to prevent the adhesive from being applied between the attachment member and the pressure relief mechanism (213);

a mounting module for mounting and fixing the spacer member (14) relative to the battery cell (20) or the attachment member, and applying the adhesive to attach the battery cell (20) to the attachment member.