CN221041395U

CN221041395U - Battery, battery pack, power utilization device and energy storage device

Info

Publication number: CN221041395U
Application number: CN202420425420.3U
Authority: CN
Inventors: 李波; 柳洋; 赵宾; 邱宇东
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2024-03-06
Filing date: 2024-03-06
Publication date: 2024-05-28
Anticipated expiration: 2034-03-06

Abstract

The application discloses a battery, a battery pack, an electricity utilization device and an energy storage device. The battery includes a housing assembly, a top cap assembly, and at least one battery cell. The housing assembly is formed with an accommodating space, and one side of the housing assembly along the first direction is provided with an opening. The top cover assembly comprises a top cover body and an electric connecting piece which is arranged on the top cover body and can conduct electricity, a fixed connecting piece is formed on the top cover body, the top cover assembly is connected with the shell assembly and seals the opening through the cooperation of the fixed connecting piece and the shell assembly, and at least one through hole is formed in the top cover body. The battery monomer is located accommodation space, and the single utmost point ear of battery is connected with the electric connection piece electricity of top cap subassembly. Wherein, the battery cell is a soft package battery cell, and the through hole is used as a discharge channel for discharging the discharged materials generated by the battery cell under the condition of thermal runaway from the accommodating space. The application can realize the directional eruption of the battery monomer in the battery, so that the eruption direction in thermal runaway is controllable, and the safety risk of the battery is reduced.

Description

Battery, battery pack, power utilization device and energy storage device

Technical Field

The application relates to the technical field of batteries, in particular to a battery, a battery pack, an electricity utilization device and an energy storage device.

Background

New energy batteries are increasingly used in life and industry, for example, new energy automobiles having a battery mounted therein have been widely used, and in addition, batteries are increasingly used in the field of energy storage and the like.

In the process of using the battery monomer, because of the conditions of overheating, short circuit, overcharging, self-heating or mechanical collision and the like, the risk of thermal runaway can exist, and under the condition of thermal runaway, the battery monomer can generate a large amount of gas and more heat, if the direction of eruption of emissions generated by the thermal runaway cannot be well guided, the emissions at high temperature can be scattered and erupted, the thermal runaway of other battery monomers or the damage of parts in the battery can be further caused, and thus the chain reaction is generated to make the thermal runaway more serious. Therefore, it is one of the subjects of the industry to develop a method for guiding the direction of emission from a battery cell during thermal runaway to reduce the safety risk of the battery.

Disclosure of utility model

In order to solve the technical problems, the application provides a battery, a battery pack, an electricity utilization device and an energy storage device, wherein the direction of eruption of the battery monomer can be controlled when the battery monomer is in thermal runaway.

The application is realized by the following technical scheme.

A first aspect of the present application provides a battery including a case assembly formed with an accommodating space, the case assembly having an opening at one side in a first direction; the top cover assembly comprises a top cover body and an electric connecting piece which is arranged on the top cover body and can conduct electricity, a fixed connecting piece is formed on the top cover body, the top cover assembly is connected with the shell assembly through the cooperation of the fixed connecting piece and the shell assembly and seals the opening, and at least one through hole is formed in the top cover body; at least one battery cell positioned in the accommodating space, and a tab of the battery cell is electrically connected with an electrical connector of the top cover assembly; wherein the battery cell is a soft pack battery cell, and the through hole is used as a discharge channel for discharging the discharged material generated by the battery cell under the condition of thermal runaway from the accommodating space.

Because the battery monomer is located in the accommodation space of casing subassembly, consequently, the casing subassembly can play certain guard action to the battery monomer to reduce the battery monomer and because appear mechanical collision and take place the risk of thermal runaway. And the top cap subassembly can seal the opening of casing subassembly to further play the effect of protection to the battery monomer in the accommodation space. The top cover assembly and the shell assembly are connected through the cooperation of the fixed connection piece of the top cover body and the shell assembly, the structure is simple, the assembly efficiency is high, and the connection stability between the top cover assembly and the shell assembly can be improved.

In addition, since the through hole is formed in the top cover assembly which is arranged at the opening of the shell assembly, and the through hole is used as a discharge channel for discharging the discharge generated by the battery monomer from the accommodating space under the condition of thermal runaway, even if the battery monomer is subjected to thermal runaway, the discharge generated by the thermal runaway is not scattered and sprayed in a preset direction and position through the through hole of the top cover assembly, so that the directional spraying of the battery monomer during the thermal runaway is realized, the spraying direction of the high-temperature discharge generated during the thermal runaway is controllable, the possibility that the discharge affects other battery monomers or other parts in the battery is reduced, and the safety risk of the battery is reduced.

Moreover, because of its soft packaging structure, be difficult for realizing directional eruption, also take place to damage more easily, consequently, place soft packet of battery monomer in the casing subassembly, can carry out good protection to soft packet of battery monomer, reduce soft packet of battery monomer and take place the possibility of damage, help improving soft packet of battery monomer's life. In addition, through accomodating soft packet of battery in the casing, do benefit to the assembly that follow-up group becomes the battery package more, improve assembly efficiency, reduce the assembly degree of difficulty.

In some embodiments, the battery further comprises a shield that shields the through hole and is adhered to the outer surface of the cap body. The shutter is disconnected from the cap body by the exhaust generated by thermal runaway of the battery cell so that the through-hole is used as the exhaust passage. Wherein the shielding piece is made of mica.

Thereby, the possibility that external impurities or other emissions generated when the battery is in thermal runaway enter the accommodating space of the shell assembly through the through hole can be reduced, and the possibility that the battery single body is damaged or the thermal runaway of the battery is further serious is reduced. In addition, because the shielding piece is used for shielding the through hole in a bonding mode, the connection strength between the shielding piece and the top cover body is low, when the battery monomer in the shell assembly is in thermal runaway, the shielding piece is easy to be flushed away by emissions generated by the thermal runaway, the shielding piece is disconnected with the top cover body, and the emissions can be discharged through the through hole, so that the shielding piece can realize shielding protection function and meanwhile, the directional eruption of the battery monomer is not influenced.

In addition, mica has good structural strength, good flame retardant efficiency to and good insulating properties, under the circumstances that other batteries take place thermal runaway, the shielding piece of mica material can be fine stop external pressure and high temperature to can be better play the guard action to the battery monomer in the accommodation space.

In some embodiments, the securing connection is formed protrusively on the cap body. The housing assembly is formed with a hole through which the securing connection at least partially passes to connect the cap body and the housing assembly.

Therefore, when the top cover assembly is connected with the shell assembly, the positioning of the shell assembly can be realized quickly, and the assembly is convenient.

In some embodiments, the fixed connection is configured as a rivet connection, and the top cover body is rivet-connected to the housing assembly by mating of the fixed connection with the hole.

The connecting process can be completed rapidly by adopting a hot riveting connection mode, and the assembly efficiency is higher. And the shell component and the top cover component which are connected in a hot riveting mode are higher in connection strength, better in stability and not easy to fall off and damage. In addition, after the connection is performed by adopting a hot riveting process, the surface of the connection part is flat and smooth, obvious marks or flaws are not easy to leave, and the possibility of bad conditions of battery damage caused by collision or friction when the batteries are grouped can be reduced.

In some embodiments, the number of the fixed connectors is a plurality, and the plurality of the fixed connectors are arranged at intervals along the circumferential direction of the top cover body; the number of the holes is a plurality of the holes, and the holes are arranged at intervals along the circumferential direction of the shell component; wherein, each fixed connecting piece correspondingly passes through each hole so as to connect the top cover body and the shell assembly.

Therefore, the connection strength between the shell component and the top cover component can be further improved, and the possibility of connection looseness caused by collision and vibration between the top cover component and the shell component is reduced.

In some embodiments, the housing assembly includes a circumferential wall and a flame retardant member, the opening being located on one side of the circumferential wall in the first direction, the flame retardant member being located on the other side of the circumferential wall in the first direction and being connected to the circumferential wall throughout the circumference. Wherein, the material of fire retardant spare includes mica.

From this, the casing subassembly that can provide better thermal protection performance, play better guard action to the battery monomer in the accommodation space of casing subassembly. Moreover, when thermal runaway occurs in the battery cell in the accommodating space, emissions generated by the thermal runaway are blocked by the flame retardant member, so that the emissions can be discharged only through the through holes in the top cover assembly covered at the opening, and directional explosion of the battery cell is realized.

In addition, mica has good structural strength, good flame retardant efficiency and good insulating property, and can better protect the battery monomer in the accommodating space.

In some embodiments, the circumferential wall is formed from a sheet metal material that includes a first end and a second end, the first end and the second end being connected to each other along a circumferential direction of the circumferential wall.

From this, can carry out the electricity with the electric connector of battery monomer and top cap subassembly earlier and be connected the back, the mode of buckling again forms the circumference wall of casing subassembly to make circumference wall can wrap up the fixed connection spare on battery monomer and the top cap subassembly with the mode of encircleing, thereby can reduce the possibility that causes the damage to battery monomer when installing the casing subassembly, but also can reduce the connection degree of difficulty of casing subassembly and top cap subassembly, improve assembly efficiency.

In some embodiments, the electrical connector includes a connection portion including a connection face extending along the first direction and an exposed portion connected with the connection portion, the exposed portion being exposed outside of the housing assembly. The tabs of the battery cells extend along the first direction, and the tabs are connected with the connecting surfaces of the connecting portions.

Because the connection face of the connection part of the electric connection piece and the lug of the battery monomer extend along the first direction, the lug of the battery monomer can be connected with the connection face of the connection part in a bending-free manner, so that the risk of fracture of the lug is reduced, the connection is more stable, and the reliability of the battery monomer is improved.

A second aspect of the present application provides a battery pack including a case; and at least one battery according to the first aspect of the application, the battery being accommodated in the case.

Because the battery monomer is located the casing subassembly to when forming the battery package in groups, can be with the connection mode of square shell battery to group, the assembly is easier. In addition, when the battery in the battery pack is out of control, the directional spraying can be realized, so that the safety risk can be effectively reduced.

A third aspect of the application provides an electrical consumer comprising a battery according to the first aspect of the application or a battery pack according to the second aspect of the application for providing electrical energy.

The power utilization device provided by the embodiment of the application adopts the battery pack with good performance, so that the time spent on maintenance is reduced, and the safety risk is low.

A fourth aspect of the application provides an energy storage device comprising a battery according to the first aspect of the application or a battery pack according to the second aspect of the application for storing or providing electrical energy.

The energy storage device provided by the embodiment of the application adopts the battery pack with good performance, so that the time spent for maintenance is reduced, and the safety risk is low.

According to the application, under the condition of thermal runaway of the battery monomer, the direction of spraying high-temperature emissions generated by the thermal runaway can be controlled, so that the directional spraying of the battery monomer is realized, and the safety risk of the battery is further reduced.

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 present application;

fig. 2 is an exploded perspective view of a battery pack according to some embodiments of the present application;

fig. 3 is a partially exploded perspective view of a battery provided in some embodiments of the application;

fig. 4 is a schematic plan view of a battery cell according to some embodiments of the present application;

FIG. 5 is a schematic plan view of a top cap assembly according to some embodiments of the present application;

FIG. 6 is another schematic plan view of a top cap assembly according to some embodiments of the present application;

FIG. 7 is a schematic view of yet another planar configuration of a header assembly provided in accordance with some embodiments of the present application;

FIG. 8 is a schematic plan view of a circumferential wall of a housing assembly provided in accordance with some embodiments of the present application;

FIG. 9 is another plan view schematic of the circumferential wall of a housing assembly provided in accordance with some embodiments of the application;

FIG. 10 is an expanded plan view of a circumferential wall of a housing assembly provided in accordance with some embodiments of the present application;

Fig. 11 is a flow chart illustrating an assembly method of a battery according to some embodiments of the present application.

Description of the reference numerals

1-A housing assembly; 11-accommodation space; 12-opening; 13-a circumferential wall; 2-a top cover assembly; 21-a top cover body; 22-electrical connectors; 221-a connection; 2211—a connection face; 222-exposed portion; 3-a fixed connection; 4-through holes; 5-holes; 6-a first end; 7-a second end; 8-welding part; 9-a shutter; 10-flame retardant; 20-battery cells; 201-electrode lugs; 100-cell; 200-a controller; 300-motor; 400-battery pack; 401-a box body; 401 a-a cover; 401 b-a bottom plate; 1000-vehicle.

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, are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present application, the technical terms "first," "second," "third," "fourth," etc. are used merely to distinguish between different objects and should not 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 "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In this context, the character "/" generally indicates that the associated object is an "or" relationship.

In the description of the embodiments of the present application, the orientation or positional relationship indicated by the technical terms "length", "width", "thickness", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. are orientation or positional relationship based on the drawings, and are merely for convenience of describing the embodiments of the present application and for simplifying the description, and are not intended to indicate or imply that the apparatus or element in question must have a specific orientation, be constructed, operated, or used in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless 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 description of the embodiments of the present application, unless explicitly specified and limited otherwise, the term "contact" is to be understood in a broad sense as either direct contact or contact across an intermediate layer, as either contact with substantially no interaction force between the two in contact or contact with interaction force between the two in contact.

The present application will be described in detail below.

At present, new energy batteries are increasingly widely applied to life and industry. The new energy battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and a plurality of fields such as aerospace. With the continuous expansion of the application field of the power battery, the market demand of the power battery is also continuously expanding.

The battery cell in the battery can not realize the complete conversion of chemical energy and electric energy in the process of charge-discharge cycle, part of the chemical energy and the electric energy can be converted into heat energy, and when uncontrollable abnormal change of the heat energy generated by the battery cell occurs, the battery cell can be called as thermal runaway of the battery cell.

There are many factors that cause thermal runaway of the battery cells, such as overheating, short-circuiting, overcharging, self-heating, or mechanical impact. Under the condition that thermal runaway occurs in the battery cell, a large amount of gas and more heat can be generated, if the direction of eruption of the emissions generated by the thermal runaway cannot be well guided, the emissions with high temperature are likely to be dispersed and erupted to the surroundings, further other thermal runaway of the battery cell or damage of other parts in the battery are caused, and therefore chain reaction is generated, the thermal runaway phenomenon is more serious, and the safety risk of the battery is seriously increased.

In particular, in the case of a soft battery cell, since a soft (flexible) package structure is used, it is difficult to control the direction of the spray at the time of thermal runaway. Further, if the pouch battery cell bursts on the side due to thermal runaway, the pouch battery cell is more likely to spread to the adjacent battery cell, and there is a risk of causing more severe thermal runaway. Therefore, how to control the direction of the burst when the thermal runaway of the soft battery cell is performed is one of the technical problems to be solved by the present application.

The present application has been made in view of the above-mentioned problems occurring in the related art, and proposes a battery. The battery includes a housing assembly, a top cap assembly, and at least one battery cell. The housing assembly is formed with an accommodating space, and one side of the housing assembly along the first direction is provided with an opening. The top cover assembly comprises a top cover body and an electric connecting piece which is arranged on the top cover body and can conduct electricity, a fixed connecting piece is formed on the top cover body, the top cover assembly is connected with the shell assembly and seals the opening through the cooperation of the fixed connecting piece and the shell assembly, and at least one through hole is formed in the top cover body. At least one battery cell is positioned in the accommodating space, and the tab of the battery cell is electrically connected with the electric connecting piece of the top cover assembly. Wherein, the battery cell is a soft package battery cell, and the through hole is used as a discharge channel for discharging the discharged materials generated by the battery cell under the condition of thermal runaway from the accommodating space.

Because the battery monomer is located in the accommodation space of casing subassembly, consequently, the casing subassembly can play certain guard action to the battery monomer to reduce the battery monomer and because appear mechanical collision and take place the risk of thermal runaway. Moreover, the opening of the shell assembly can be sealed by the top cover assembly, the battery monomer in the accommodating space is further protected, the top cover assembly and the shell assembly are connected through the cooperation of the fixed connecting piece of the top cover body and the shell assembly, the structure is simple, the assembly efficiency is high, and the connection stability between the top cover assembly and the shell assembly can be improved.

The battery provided by the embodiment of the application can be used for, but is not limited to, energy storage power supply systems, electric devices such as vehicles, ships or aircrafts, and energy storage devices such as energy storage containers and energy storage electric cabinets.

The battery provided by the embodiment of the application can be used as a battery pack in groups. The battery pack can be used in energy storage power supply systems, vehicles, ships or aircrafts and other electric devices, and in energy storage containers, energy storage electric cabinets and other energy storage devices. The use of a battery pack can provide a higher total energy. In addition, the battery pack is formed by arranging a plurality of grouped batteries in the box body, thereby having more reliable dustproof and waterproof performance, and being applicable to scenes where the use environment is worse, moist and even immersed.

The embodiment of the application provides an electric device comprising the battery or the battery pack for providing electric energy, wherein the electric device comprises, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

In the following embodiments, for convenience of explanation, the electric device according to an embodiment of the present application will be described by taking the vehicle 1000 as an example. The following description refers to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. As shown in fig. 1, the battery 100 is provided inside the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Fig. 2 is an exploded perspective view of a battery pack 400 according to an embodiment of the present application. As shown in fig. 2, the battery pack 400 includes a case 401 and at least one battery 100, the case 401 including a cover 401a and a base 401b, the cover 401a being covered over the base 401b, thereby forming an accommodating space of the battery 100 between the base 401b and the cover 401 a.

In the battery pack 400, a plurality of batteries 100 may be provided, and a plurality of batteries 100 may be connected in series or in parallel, and a series-parallel connection means that a plurality of batteries 100 are connected in series or in parallel. The batteries 100 can be directly connected in series, in parallel or in series-parallel, and then the whole body formed by the batteries 100 is placed in the accommodating space formed by the bottom plate 401b and the cover body 401 a; of course, the battery 100 may be a battery module formed by connecting a plurality of battery cells 20 in series or parallel or series-parallel connection, and then connecting a plurality of battery modules in series or parallel or series-parallel connection to form a whole, and the battery modules are accommodated in an accommodating space formed by the bottom plate 401b and the cover 401 a. The battery pack 400 may further include other structures, for example, the battery pack 400 may further include a bus member for making electrical connection between the plurality of batteries 100.

Some embodiments of the present application are described in detail below with reference to fig. 3 to 11.

Fig. 3 is a partially exploded perspective view of a battery according to some embodiments of the present application. Fig. 4 is a schematic plan view of a battery cell according to some embodiments of the present application. Fig. 5 is a schematic plan view of a top cap assembly according to some embodiments of the present application. Fig. 6 is another schematic plan view of a top cap assembly according to some embodiments of the present application. Fig. 7 is a schematic view of still another planar structure of a header assembly provided in some embodiments of the present application. Fig. 8 is a schematic plan view of a circumferential wall of a housing assembly provided in accordance with some embodiments of the present application. Fig. 9 is another plan view schematic of the circumferential wall of a housing assembly provided in accordance with some embodiments of the application. Fig. 10 is an expanded plan view of a circumferential wall of a housing assembly provided in accordance with some embodiments of the present application. Fig. 11 is a flow chart illustrating an assembly method of a battery according to some embodiments of the present application.

In some embodiments of the present application, the first direction is set for ease of illustration. For convenience of explanation, as shown by arrows in fig. 3, 4, and 6 to 10, a direction in which the arrow R1 is located is a first direction.

As shown in fig. 3 and 4, a first aspect of the present application provides a battery 100. The battery 100 includes a case assembly 1, a top cap assembly 2, and at least one battery cell 20. The housing assembly 1 is formed with an accommodation space 11, and one side of the housing assembly 1 in the first direction has an opening 12. The top cover assembly 2 comprises a top cover body 21 and an electric connecting piece 22 which is arranged on the top cover body 21 and can conduct electricity, a fixed connecting piece 3 is formed on the top cover body 21, the top cover assembly 2 is connected with the shell assembly 1 and closes the opening 12 through the cooperation of the fixed connecting piece 3 and the shell assembly 1, and at least one through hole 4 is formed in the top cover body 21. The battery cell 20 is located in the receiving space 11, and the tab 201 of the battery cell 20 is electrically connected with the electrical connector 22 of the cap assembly 2. Wherein the battery cell 20 is a pouch battery cell, and the through-hole 4 serves as a discharge passage through which the discharge generated by the battery cell 20 in the event of thermal runaway is discharged from the accommodation space 11.

The case assembly 1 is a protective case for the outside of the battery cell 20, and has an accommodation space 11 formed therein. Because the battery cell 20 is arranged in the accommodating space 11 of the housing assembly 1, the housing assembly 1 can play a certain role in protecting the battery cell 20, thereby reducing the risk of damage or thermal runaway of the battery cell 20 due to mechanical collision, and improving the stability of the battery cell 20.

The embodiment of the present application does not specifically limit the number of battery cells 20 in the accommodation space 11 of the housing assembly 1 of the battery 100, and one battery cell, two battery cells, three battery cells, or more battery cells may be provided in the accommodation space 11 of the housing assembly 1 of one battery 100. Specifically, in some embodiments of the present application, the number of battery cells 20 accommodated in one accommodation space 11 is four.

The housing component 1 can be made of a metallic material, for example, and thus has a good bearing capacity, which can better protect the internal battery cells. The metallic material includes, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, and the like.

Also, for example, the housing assembly 1 may be injection molded as one piece from a plastic material that is itself lighter in weight and has good insulation properties without the need for additional insulation layers to be provided in the case of meeting the basic strength requirements.

The case assembly 1 of the present application may be cylindrical, prismatic, and the case of prismatic shape includes square case, blade shape, polygonal prism shape, for example, hexagonal prism shape, etc., and the present application is not particularly limited.

The battery cell 20 is a basic unit capable of performing mutual conversion between chemical energy and electric energy, and can be used to make a battery or a battery pack for supplying power to an electric device or an energy storage device.

The battery cell 20 may be a secondary battery cell, which is a battery cell that can be used continuously by activating an active material in a charging manner after the battery cell is discharged.

The battery cell 20 may be a lithium ion battery cell, a sodium lithium ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium sulfur battery cell, a magnesium ion battery cell, a nickel hydrogen battery cell, a nickel cadmium battery cell, a lead storage battery cell, etc., which is not limited by the embodiment of the application.

The battery cell 20 may be a pouch battery cell.

Although not shown, the battery cell 20 includes an electrode assembly. The electrode assemblies are generally arranged in a stacked manner in the thickness direction of the battery cells 20. The electrode assembly is a component in which electrochemical reactions occur in the battery cell 20.

The electrode assembly includes a positive electrode tab, a negative electrode tab, and a separator. During the charge and discharge of the battery cell, active ions (e.g., lithium ions) are inserted and extracted back and forth between the positive electrode sheet and the negative electrode sheet. The separator is arranged between the positive pole piece and the negative pole piece, can play a role in preventing the positive pole piece and the negative pole piece from being short-circuited, and can enable active ions to pass through.

In some embodiments, the positive electrode may be a positive electrode sheet, which may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector.

As an example, the positive electrode current collector has two surfaces opposing in its own thickness direction, and the positive electrode active material is provided on either or both of the two surfaces opposing the positive electrode current collector.

As an example, the positive electrode current collector may employ a metal foil or a composite current collector. For example, as the metal foil, silver-surface-treated aluminum or stainless steel, copper, aluminum, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The composite current collector may be formed by forming a metal material (aluminum, aluminum alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.).

As an example, the positive electrode active material may include at least one of the following materials: lithium-containing phosphates, lithium transition metal oxides, and their respective modified compounds. However, the present application is not limited to these materials, and other conventional materials that can be used as a battery positive electrode active material may be used. These positive electrode active materials may be used alone or in combination of two or more. Examples of the lithium-containing phosphate may include, but are not limited to, at least one of lithium iron phosphate (e.g., liFePO4 (which may also be abbreviated as LFP)), a composite of lithium iron phosphate and carbon, lithium manganese phosphate (e.g., liMnPO 4), a composite of lithium manganese phosphate and carbon, lithium manganese phosphate, and a composite of lithium manganese phosphate and carbon.

In some embodiments, the positive electrode may be a metal foam. The foam metal can be foam nickel, foam copper, foam aluminum or foam alloy. When the metal foam is used as the positive electrode, the surface of the metal foam may not be provided with the positive electrode active material, but may be provided with the positive electrode active material. As an example, a lithium source material, which is lithium metal and/or a lithium-rich material, potassium metal or sodium metal, may also be filled and/or deposited within the foam metal.

In some embodiments, the negative electrode may be a negative electrode tab, which may include a negative electrode current collector.

As an example, the negative electrode current collector may employ a metal foil, a foam metal, or a composite current collector. For example, as the metal foil, silver-surface-treated aluminum or stainless steel, copper, aluminum, nickel, titanium, or the like can be used. The composite current collector may include a polymeric material base layer and a metal layer. The foam metal can be foam nickel, foam copper, foam aluminum or foam alloy. The composite current collector may be formed by forming a metal material (copper, copper alloy, nickel alloy, titanium alloy, silver alloy, etc.) on a polymer material substrate (e.g., a substrate of polypropylene, polyethylene terephthalate, polybutylene terephthalate, polystyrene, polyethylene, etc.). In some embodiments, the material of the positive electrode current collector may be aluminum and the material of the negative electrode current collector may be copper.

In some embodiments, the electrode assembly further includes a separator disposed between the positive electrode and the negative electrode.

In some embodiments, the separator is a separator film. The type of the separator is not particularly limited, and any known porous separator having good chemical stability and mechanical stability can be used.

As an example, the main material of the separator may be at least one selected from glass fiber, non-woven fabric, polyethylene, polypropylene, polyvinylidene fluoride, and ceramic.

In some embodiments, the separator is a solid state electrolyte. The solid electrolyte is arranged between the anode and the cathode and plays roles in transmitting ions and isolating the anode and the cathode.

In some embodiments, the electrode assembly is a rolled structure. The positive plate and the negative plate are wound into a winding structure.

In some embodiments, the electrode assembly is a lamination stack.

As an example, a plurality of positive electrode sheets and negative electrode sheets may be provided, respectively, and a plurality of positive electrode sheets and a plurality of negative electrode sheets may be alternately stacked.

As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheets are folded to form a plurality of folded sections arranged in a stacked manner, with one positive electrode sheet sandwiched between adjacent folded sections.

As an example, the positive and negative electrode sheets are each folded to form a plurality of folded sections in a stacked arrangement.

As an example, the separator may be provided in plurality, respectively between any adjacent positive electrode sheet or negative electrode sheet.

As an example, the separator may be continuously provided, being disposed between any adjacent positive or negative electrode sheets by folding or winding.

In some embodiments, the electrode assembly may have a cylindrical shape, a flat shape, a polygonal column shape, or the like.

In some embodiments, the battery cell 20 further includes an electrolyte that serves to conduct ions between the positive and negative electrodes. The application is not particularly limited in the kind of electrolyte, and may be selected according to the need. The electrolyte may be liquid, gel or solid.

In some embodiments, the electrode assembly is provided with tabs that can conduct current away from the electrode assembly. The tab includes a positive tab and a negative tab.

In some embodiments, the battery cell 20 may include a housing. The case is used to encapsulate the electrode assembly, the electrolyte, and the like. The shell can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell), an aluminum-plastic film or the like. The outer case of the soft pack battery cell is soft.

In embodiments of the present application, battery 100 may also be a single physical module that includes one or more battery cells 20 to provide higher voltage and capacity. When there are a plurality of battery cells 20, the plurality of battery cells 20 may be connected in series, parallel or series-parallel with each other.

The top cover assembly 2 covers the opening 12 of the housing assembly 1 to form the accommodating space 11, so that the battery cells in the accommodating space 11 can be further protected, and the possibility that the battery cells in the accommodating space 11 are separated from the housing assembly 1 from the opening 12 can be reduced.

The shape of the cap assembly 2 may be adapted to the shape of the opening 12 of the housing assembly 1. Alternatively, the top cap assembly 2 may be made of a material having a certain hardness and strength, so that the top cap assembly 2 is not easily deformed when being impacted by compression, enabling the battery 100 to have a higher structural strength.

The cap assembly 2 includes a cap body 21 and an electrical connector 22, the electrical connector 22 being disposed on the cap body 21.

Illustratively, the material of the top cover body 21 includes, but is not limited to, copper, iron, aluminum, stainless steel, aluminum alloy, resin, plastic, etc.

The electrical connector 22 may be used to electrically connect with the tab 201 of the battery cell 20 for inputting or outputting electrical energy with respect to the battery cell 20. The electrical connector 22 may also be referred to as a tab or a swivel tab.

Illustratively, the electrical connector 22 is a conductive metal material including, but not limited to, copper, aluminum, steel-aluminum alloy, and the like.

The tab 201 of the battery cell 20 refers to a portion that leads the electrode assembly within the battery cell 20 to the outer case of the battery cell 20.

The tabs 201 of the battery cells 20 may be electrically connected to the electrical connectors 22 of the cap body 21, for example, by welding.

In the embodiment of the application, the fixed connecting piece 3 is formed on the top cover body 21, the top cover assembly 2 and the shell assembly 1 can be connected through cooperation between the fixed connecting piece 3 of the top cover body 21 and the shell assembly 1, the structure is simple, the assembly efficiency is high, the connection stability between the top cover assembly 2 and the shell assembly 1 can be improved, and the possibility of looseness between the top cover assembly 2 and the shell assembly 1 is reduced. Moreover, the assembly efficiency is higher and the manufacturing cost is lower by adopting the fixing connector 3 for connection than the conventional method of connecting the top cover assembly 2 and the housing assembly 1 by welding or clamping.

The fixed connection 3 includes, but is not limited to, a rivet, a screw, etc.

As shown in fig. 5, a through hole 4 is formed in the header assembly 2 that covers the opening 12 of the housing assembly 1. Specifically, in the embodiment of the present application, the number of the through holes 4 is plural, and the plural through holes 4 are arranged on the cap body 21 at intervals.

Illustratively, the plurality of through holes 4 are arranged centrally on one side on the head assembly 2, and the electrical connector 22 is arranged on the other side on the head assembly 2, whereby the direction of the firing at the time of thermal runaway can be further guided.

The through holes 4 serve as a discharge passage through which the discharge generated by the battery cells 20 in the case of thermal runaway is discharged from the accommodating space 11, so that even if the thermal runaway occurs in the battery cells 20 in the accommodating space 11, the discharge generated by the thermal runaway is not sprayed around, but is sprayed through the through holes 4 of the cap assembly 2 toward a preset direction and position, thereby realizing directional spraying of the thermal runaway of the battery cells 20, enabling the spraying direction of the high-temperature discharge generated in the thermal runaway to be controllable, reducing the possibility that the discharge affects other battery cells around or other parts in the battery, and reducing the safety risk of the battery 100.

It should be understood by those skilled in the art that the number of through holes 4 is not specifically limited in the embodiment of the present application, and only one through hole 4 may be included, or two, three or more through holes 4 may be included, and specific settings may be made according to the actual dimensions of the top cover body 21, so long as the through holes 4 do not affect the placement of the electrical connectors 22 and other functional components on the top cover body 21.

In the embodiment of the application, the battery unit 20 is a soft package battery unit, and the soft package battery unit is usually packaged by soft aluminum plastic package, and because of the special property of soft materials, no corresponding structure and position are arranged in the soft package battery unit, such components as an exhaust channel, a safety valve and the like are arranged in the soft package battery unit, so that when the soft package battery unit is in thermal runaway, directional eruption cannot be realized, high-temperature emissions generated by the thermal runaway can burst through a plastic package film, and the edge sealing is randomly erupted from the edge sealing to the periphery, and other parts in the battery are easily influenced by other surrounding battery units. And the soft pack battery cell is placed in the accommodating space 11 of the housing assembly 1, and when the soft pack battery cell is out of control, high-temperature emissions generated by the soft pack battery cell can be discharged through the through hole 4 of the top cover assembly 2, so that the directional eruption of the soft pack battery cell is realized.

In addition, the soft package battery monomer is soft, so that the soft package battery monomer is more easily damaged when being impacted and collided by the outside, and therefore, the soft package battery monomer is placed in the hard shell assembly 1, the soft package battery monomer can be well protected, the possibility of damage of the soft package battery monomer is reduced, the service life of the soft package battery monomer is prolonged, and the possibility of thermal runaway of the soft package battery monomer due to mechanical collision or vibration is also reduced.

In addition, the connection mode of the soft package battery can be changed into the connection mode of the square shell battery, so that the assembly connection can be easier when the subsequent batteries are assembled into a battery pack, the assembly efficiency can be improved, and the assembly difficulty can be reduced.

Of course, it should be understood by those skilled in the art that the battery cells 20 in the housing assembly 1 are not limited to only pouch cells, but may be any other type of battery cells.

In some embodiments, as shown in fig. 3, the battery 100 further includes a shielding member 9, and the shielding member 9 shields the through-hole 4 and is adhered to the outer surface of the cap body 21. Under the effect of the emissions generated by the thermal runaway of the battery cells 20, the shutter 9 is disconnected from the cap body 21 so that the through-holes 4 are used as the discharge channels. Wherein the material of the shielding member 9 comprises mica.

By providing the shielding member 9, it is possible to reduce the possibility that foreign substances from the outside or emissions generated when other surrounding batteries 100 are thermally out-of-control enter the housing space 11 of the housing assembly 1 through the through-hole 4, thereby reducing the possibility that the internal battery cells 20 are damaged or the thermal out-of-control of the batteries is further serious.

In addition, since the shielding member 9 shields the through-hole 4 by means of adhesion, the strength of the connection with the cap assembly 2 is low, and thus, when thermal runaway occurs in the battery cells in the case assembly 1, the exhaust generated by the thermal runaway easily washes out the shielding member 9, so that the connection between the shielding member 9 and the cap body 21 is broken, and thus, the exhaust can be discharged through the through-hole 4, and therefore, the shielding member 9 does not affect the directional burst of the battery cells 20 while realizing the shielding protection function.

The shielding element 9 can be glued around the through-hole 4, for example, by means of double-sided glue.

In addition, the plurality of through holes 4 may share one shutter 9.

In addition, the shielding member 9 of the embodiment of the present application is made of mica, which has good structural strength, good flame retardant effect, and good insulating property. Therefore, when thermal runaway occurs in other surrounding batteries 100, the mica-made shielding member 9 can well block external pressure and high temperature, so that the battery cells in the accommodating space 11 can be better protected, and the thermal runaway is prevented from being serious.

Of course, it will be appreciated by those skilled in the art that the shield 9 may be made of any other suitable material.

In some embodiments, as shown in fig. 6 to 9, the fixing connector 3 is protrusively formed at the cap body 21. The housing assembly 1 is formed with a hole 5, and the fixing connector 3 at least partially penetrates the hole 5 to connect the top cover body 21 and the housing assembly 1.

Thereby, the protruding fixing connection 3 can be positioned with the housing assembly 1 at least partially through the hole 5 when the top cover assembly 2 is connected with the housing assembly 1, thereby facilitating the assembly.

Illustratively, the aperture 5 may be generally circular.

Also, for example, the hole 5 may be substantially elongated, and the elongated hole 5 may be more convenient for the fixing connector 3 to pass through, thereby further reducing the assembly difficulty.

The shape and size of the hole 5 are not particularly limited in the embodiment of the present application, so long as the fixing connector 3 can pass through.

In the embodiment of the application, the fixed connecting piece 3 and the top cover body 21 are formed into an integral structure, so that the number of parts can be reduced, and the assembly difficulty can be reduced.

Of course, it will be appreciated by those skilled in the art that in some other embodiments, the securing connector 3 and the cap body 21 may be of a split construction and then assembled together.

In some embodiments, the fixing connector 3 is configured as a hot rivet connector, and the top cover body 21 is connected to the housing assembly 1 through the cooperation of the fixing connector 3 and the hole 5.

Illustratively, the fixing connector 3 may be a heat stake, and when the housing assembly 1 and the top cover assembly 2 are assembled, after the heat stake on the top cover body 21 passes through the hole 5 on the housing assembly 1, the heat stake is heated at a high temperature, so that the heat stake is melted and deformed and connected with the housing assembly 1.

The top cover assembly 2 and the shell assembly 1 are connected in a hot riveting connection mode, so that the connection process can be completed quickly, the assembly efficiency is high, and the field operation is easy. And the connection strength between the case assembly 1 and the cap assembly 2, which are connected in a heat staking manner, is higher, the stability is better, and the falling off and damage in mechanical impact or vibration are not easy to occur, further increasing the stability of the battery 100.

In addition, after the shell assembly 1 and the top cover assembly 2 are connected by adopting the hot riveting process, the surface of the connecting part between the shell assembly 1 and the top cover assembly 2 is flat and smooth, and obvious convex marks or flaws are not easy to leave, so that when a plurality of batteries 100 are grouped, the possibility of bad conditions of damage of the batteries 100 caused by collision or friction between the batteries 100 can be reduced.

In some embodiments, the number of the fixing connectors 3 is plural, and the plural fixing connectors 3 are arranged at intervals along the circumferential direction of the cap body 21. The number of the holes 5 is a plurality of the holes 5, and the holes 5 are arranged at intervals along the circumferential direction of the shell assembly 1; wherein, each fixing connecting piece 3 correspondingly passes through each hole 5 to connect the top cover body 21 and the shell assembly 1.

The top cover body 21 can be provided with one or more fixed connection pieces 3 on each end face along the circumferential direction, and the shell assembly 1 can also be provided with one or more holes 5 on each end face along the axial direction, the number of the holes 5 corresponds to the number of the fixed connection pieces 3, and the positions of the holes 5 correspond to the positions of the fixed connection pieces 3, so that when the shell assembly 1 and the top cover assembly 2 are connected and assembled, the holes 5 and the fixed connection pieces 3 can be assembled in a one-to-one correspondence manner.

The number of the holes 5 and the fixing connectors 3 is not particularly limited in the embodiment of the present application, and may be set according to the specific dimensions of the housing assembly 1 and the top cover body 21.

Because the quantity of hole 5 and fixed connection spare 3 is a plurality of, consequently can further improve the joint strength between casing subassembly 1 and the top cap subassembly 2, reduce the possibility that the connection is not hard up owing to collision, vibration between top cap subassembly 2 and the casing subassembly 1, further improved reliability, the stability of battery 100.

In some embodiments, as shown in fig. 3, 8 and 9, the housing assembly 1 includes a circumferential wall 13 and a flame retardant member 10, the opening 12 is located on one side of the circumferential wall 13 in the first direction, and the flame retardant member 10 is located on the other side of the circumferential wall 13 in the first direction and is connected to the circumferential wall 13 over the entire circumference. Wherein, the material of the flame retardant 10 comprises mica.

Through setting up the casing subassembly 1 that fire-retardant piece 10 can be for providing better thermal protection performance, play better guard action to the battery monomer 20 in the accommodation space 11 of casing subassembly 1.

In addition, in the case where thermal runaway occurs in the battery cell 20 in the receiving space 11, emissions generated by the thermal runaway may be blocked by the flame retardant member 10, so that the emissions can be discharged only through the through-hole 4 of the cap assembly 2, which is covered at the opening 12, and directional explosion of the battery cell 20 is achieved.

Of course, in the case where thermal runaway occurs in other surrounding batteries 100, the flame retardant member 10 can also block the probability of emissions generated when other batteries are thermally out of control from entering the accommodating space 11 of the case assembly 1, can better protect the battery cells in the accommodating space 11, and reduces the possibility of further serious thermal runaway.

Illustratively, the flame retardant element 10 can be connected to the entire circumference of the circumferential wall 13 by means of adhesive bonding, so that the adhesive bonding contact area is greater, so that the strength of the connection of the flame retardant element 10 to the circumferential wall 13 is greater than the strength of the connection of the shielding element 9 to the cap body 21, so that a directional burst in the event of thermal runaway of the battery cell 20 can be better achieved.

In addition, the mica has good structural strength, good flame retardant effect and good insulating property, and can better protect the battery cells 20 in the accommodating space 11.

It will be appreciated by those skilled in the art that although both the shield 9 and the flame retardant 10 are made of mica, the pressure bearing capacity of the two may be different. For example, the thickness of the mica from which the shutter 9 is made may be smaller than that of the mica from which the flame retardant 10 is made, so that it is possible to ensure that, when the battery cell is thermally out of control, emissions generated by the thermal runaway may blow out or break through the shutter 9 provided at the through hole 4, so that the shutter 9 can be disconnected from the cap body 21, thereby achieving the directional burst of the battery cell 20.

Of course, in some other embodiments, the material of the shielding member 9 and the flame retardant member 10 is not necessarily made of mica, and may be made of any other suitable material, and the material of the shielding member 9 and the flame retardant member 10 may be the same or different.

In some embodiments, as shown in fig. 10, the circumferential wall 13 is formed by bending a metal plate material, and the metal plate material includes a first end portion 6 and a second end portion 7 along the circumferential direction of the circumferential wall 13, and the first end portion 6 and the second end portion 7 are connected to each other.

In the related art, after the tabs of the battery cells are electrically connected with the electrical connection members of the cap assembly, they are inserted into the receiving space of the case assembly through the opening of the case assembly, and the case assembly is prefabricated and the size thereof is maintained. In the process of inserting the battery cell into the shell assembly, if the battery cell is connected with the top cover assembly to incline, or misoperation is generated when the battery cell is placed, the battery cell is likely to interfere with the inner surface of the shell assembly, so that scratch can be caused, and further damage to the battery cell can be caused.

In the embodiment of the application, after the battery cell 20 and the electric connector 22 of the top cover assembly 2 are electrically connected, the circumferential wall 13 of the housing assembly 1 is formed in a bending manner, so that the circumferential wall 13 can wrap the battery cell 20 and the fixed connector 3 on the top cover assembly 2 in a surrounding manner, the possibility of damaging the battery cell 20 when the housing assembly 1 is mounted can be reduced, the connection difficulty of the housing assembly 1 and the top cover assembly 2 can be reduced, and the assembly efficiency can be improved.

In the embodiment of the application, the first end 6 and the second end 7 are connected to each other by means of welding.

Illustratively, the end face of the first end portion 6 and the end face of the second end portion 7 may be welded to form the welded portion 8. The welding portion 8 formed by welding the two end surfaces has no overlapping area, so that materials can be saved, the circumferential wall 13 of the housing assembly 1 is smoother, and the inner accommodating space 11 of the housing assembly 1 can be increased.

Also by way of example, it may be that the first end portion 6 and the second end portion 7 partially overlap to form an overlapping region, and the weld 8 is located in the overlapping region. In this way, the welding difficulty can be reduced, and the contact area between the first end portion 6 and the second end portion 7 can be increased, thereby improving the connection strength.

Of course, it will be appreciated by those skilled in the art that in some other embodiments, the first end 6 and the second end 7 may also be connected to each other by any other suitable direction, such as adhesive bonding.

In some embodiments, the metal plate may be bent into a U shape in advance, and then after the battery cells 20 are placed into the receiving space 11 through the side openings of the U shape, the two side end plates of the bent U shape form a bent portion including a first end 6 and a second end 7, and the first end 6 and the second end 7 are connected to each other to form the circumferential wall 13 of the complete housing assembly 1.

In some embodiments, as shown in fig. 5 and 6, the electrical connector 22 includes a connection portion 221 and an exposed portion 222 connected to the connection portion 221, the connection portion 221 includes a connection surface 2211 extending along the first direction, and the exposed portion 222 is exposed to the outside of the housing assembly 1. The tab 201 of the battery cell 20 extends along the first direction, and the tab 201 is connected to the connection surface 2211 of the connection part 221.

The connection portion 221 of the electrical connector 22 is used for connecting with the tab 201 of the battery cell 20. The exposed portion 222 is exposed to the outside of the case assembly 1, and is connected to an external bus member to electrically connect the plurality of batteries 100.

Because the connection surface 2211 of the connection portion 221 of the electrical connector 22 and the tab 201 of the battery cell 20 all extend along the first direction, the tab 201 of the battery cell 20 can be connected with the connection surface 2211 of the connection portion 221 in a bending-free manner, so that the risk of breakage of the tab is reduced, the connection is more stable, and the reliability of the battery cell is improved.

Next, a method of assembling battery 100 according to the present application will be described with reference to fig. 11.

S100: the lugs of the battery cells are electrically connected with the electric connecting sheet which is connected on the top cover body in advance.

S200: the sheet metal is bent around the cells to form the peripheral wall of the housing assembly, surrounding all of the cells.

S300: the fixed connector on the top cover body is made to pass through the hole of the circumferential wall formed by bending at least partially.

S400: the fixed connection is heated at a high temperature such that the fixed connection is melt deformed and joined with the circumferential wall of the housing assembly.

S500: the flame retardant member is bonded to a side of the circumferential wall facing away from the cap assembly in the first direction, and the shielding member is bonded to the cap body at the through hole.

Therefore, the battery 100 can be assembled in a simple and rapid manner, the assembly efficiency is high, the connection strength is good, and the battery cell is not easy to damage.

A second aspect of the present application provides a battery pack 400 comprising a case 401 and at least one battery 100 according to the first aspect of the present application, the battery 100 being accommodated in the case 401.

Since the battery cells are located in the case assembly 1, when the battery pack 400 is formed in a group, the group can be formed in a connection manner of the square-case batteries, and the assembly is easier.

In addition, when the battery 100 in the battery pack 400 of the embodiment of the application is out of control, the directional spraying can be realized, so that the safety risk can be effectively reduced.

A third aspect of the present application provides an electricity-using device comprising a battery 100 according to the first aspect of the present application or a battery pack 400 according to the second aspect of the present application for providing electric energy.

The power utilization device provided by the embodiment of the application adopts the battery pack 400 with good performance, so that the time spent for maintenance is reduced, and the safety risk is low.

A fourth aspect of the present application provides an energy storage device comprising a battery 100 according to the first aspect of the present application or a battery pack 400 according to the second aspect of the present application for storing or providing electrical energy.

The energy storage device provided by the embodiment of the application adopts the battery pack 400 with good performance, so that the time spent for maintenance is reduced, and the safety risk is low.

Specific examples of some embodiments of the present application are described below with reference to the drawings.

As a specific example, the battery 100 includes a square case (case assembly 1), a bracket (top cap assembly 2), and at least one battery cell (battery cell 20). And a hot riveting column (a fixed connecting piece 3) is arranged on the bracket and is used for being connected with the square shell. After the square shell wraps the battery core, the hot riveting column on the support extends into the hole 5 formed in the square shell to be connected through hot riveting, so that the connection between the square shell and the support is guaranteed, the connection mode of the soft-package battery core can be changed into the connection mode of the square shell battery core, and assembly during grouping can be simplified.

In addition, the mica paper (flame retardant 10) is installed to the bottom of square shell, is formed with a plurality of through-holes 4 on the support, and the shielding member 9 is glued in through-hole department through the double faced adhesive tape, and when the electric core took place thermal runaway, the emission that thermal runaway produced can make shielding member 9 and the connection disconnection of support to make the emission can discharge through-hole 4, so, can realize the directional eruption of electric core.

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 they should be construed as falling within the scope of the present application. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A battery, the battery comprising:

A housing assembly formed with an accommodating space, the housing assembly having an opening at one side in a first direction;

The top cover assembly comprises a top cover body and an electric connecting piece which is arranged on the top cover body and can conduct electricity, a fixed connecting piece is formed on the top cover body, the top cover assembly is connected with the shell assembly through the cooperation of the fixed connecting piece and the shell assembly and seals the opening, and at least one through hole is formed in the top cover body;

At least one battery cell positioned in the accommodating space, and a tab of the battery cell is electrically connected with an electrical connector of the top cover assembly;

Wherein the battery cell is a soft pack battery cell, and the through hole is used as a discharge channel for discharging the discharged material generated by the battery cell under the condition of thermal runaway from the accommodating space.

2. The battery of claim 1, wherein the battery is configured to provide the battery with a plurality of cells,

The battery also comprises a shielding piece, wherein the shielding piece shields the through hole and is adhered to the outer surface of the top cover body;

disconnecting the shutter from the cap body by an exhaust generated by thermal runaway of the battery cell so as to use the through-hole as the exhaust passage;

Wherein the shielding piece is made of mica.

3. The battery according to claim 1 or 2, wherein,

The fixed connecting piece is formed on the top cover body in a protruding mode;

The housing assembly is formed with a hole through which the securing connection at least partially passes to connect the cap body and the housing assembly.

4. The battery of claim 3, wherein the battery is provided with a battery cell,

The fixed connecting piece is formed into a hot riveting connecting piece, and the top cover body is connected with the shell assembly through the cooperation hot riveting of the fixed connecting piece and the hole.

5. The battery of claim 3, wherein the battery is provided with a battery cell,

The number of the fixed connecting pieces is multiple, and the fixed connecting pieces are arranged at intervals along the circumferential direction of the top cover body; the number of the holes is a plurality of the holes, and the holes are arranged at intervals along the circumferential direction of the shell component;

Wherein, each fixed connecting piece correspondingly passes through each hole so as to connect the top cover body and the shell assembly.

6. The battery according to claim 1 or 2, wherein,

The shell assembly comprises a circumferential wall and a flame retardant piece, the opening is positioned on one side of the circumferential wall along the first direction, and the flame retardant piece is arranged on the other side of the circumferential wall along the first direction and is connected with the circumferential wall in the whole circumference;

Wherein, the material of fire retardant spare includes mica.

7. The battery of claim 6, wherein the battery is configured to provide the battery with a battery cell,

The circumferential wall is formed by bending a metal plate material, and

Along a circumferential direction of the circumferential wall, the metal sheet includes a first end and a second end, the first end and the second end being connected to each other.

8. The battery according to claim 1 or 2, wherein,

The electric connector comprises a connecting part and an exposing part connected with the connecting part, the connecting part comprises a connecting surface extending along the first direction, and the exposing part is exposed outside the shell assembly;

the tabs of the battery cells extend along the first direction, and the tabs are connected with the connecting surfaces of the connecting portions.

9. A battery pack, the battery pack comprising:

A case; and

At least one battery according to any one of claims 1 to 8, which is accommodated in the case.

10. An electrical device comprising the battery of any one of claims 1 to 8 or the battery pack of claim 9 for providing electrical energy.

11. An energy storage device comprising a battery according to any one of claims 1 to 8 or a battery pack according to claim 9 for storing or providing electrical energy.