CN221102328U

CN221102328U - Battery and electric equipment

Info

Publication number: CN221102328U
Application number: CN202322548764.1U
Authority: CN
Inventors: 袁胜刚; 王增忠; 吴友鑫
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-09-19
Filing date: 2023-09-19
Publication date: 2024-06-07
Anticipated expiration: 2033-09-19

Abstract

The application relates to a battery and electric equipment, wherein the battery comprises a battery monomer group and a bearing assembly, the battery monomer group comprises a plurality of battery monomers, the bearing assembly comprises a first plate body and a second plate body which are arranged in a laminated mode, the first plate body is positioned between the battery monomer group and the second plate body, the first plate body is provided with a through hole, and the second plate body is provided with a collecting cavity communicated with the through hole; wherein, the single being close to of battery, the one end of first plate body is provided with first relief mechanism, and first relief mechanism sets up with the through-hole relatively. The bearing assembly gives consideration to the protection of the battery against thermal runaway and the protection of the bottom of the battery, can improve the reliability of the battery and prolong the service life of the battery.

Description

Battery and electric equipment

Technical Field

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

Background

Along with the development of new energy technology, the application of the battery is more and more extensive, the battery has higher energy density, higher safety, long service life and environmental protection to the social environment, and the battery has been widely applied to the aspects of passenger cars, commercial vehicles, electric bicycles, heavy trucks, energy storage facilities, power stations, engineering manufacture, intelligent appliances and the like, and simultaneously promotes the technical development and research of communication terminals, medical appliances, energy development and the like.

In the development of battery technology, besides improving the performance of a battery, the problem of reliability is also a non-negligible problem, and how to improve the reliability of a battery and prolong the service life of a battery is always a difficult problem in battery development.

Disclosure of utility model

The embodiment of the application provides a battery and electric equipment, which can improve the reliability of the battery and prolong the service life of the battery.

In a first aspect, an embodiment of the present application provides a battery, where the battery includes a battery cell group and a bearing assembly, and the battery cell group includes a plurality of battery cells; the bearing assembly bears the battery monomer group and comprises a first plate body and a second plate body which are arranged in a stacked mode, the first plate body is positioned between the battery monomer group and the second plate body, the first plate body is provided with a through hole, and the second plate body is provided with a collecting cavity communicated with the through hole; the battery pack comprises a battery body, a first plate body and a through hole, wherein a first pressure release mechanism is arranged at one end, close to the first plate body, of the battery body, and the first pressure release mechanism is arranged opposite to the through hole.

Among the above-mentioned technical scheme, in this embodiment, first plate body sets up the through-hole, and the through-hole sets up with first relief mechanism relatively to make the emission of battery monomer get into the collection chamber of second plate body through the through-hole directly, collect the chamber and can collect the emission and bear the impact of emission, the emission can be few direct impact or not direct impact other parts in the battery like this. The bearing assembly can be used for bearing the battery monomer, can be used for collecting the emission of the battery monomer and relieving the impact of the emission, relieves the thermal runaway and spreads, gives consideration to the protection problem of the thermal runaway of the battery and the protection problem of the bottom of the battery, improves the reliability of the battery to a greater extent, and prolongs the service life of the battery.

In some embodiments, the second plate has a first surface facing the first plate, and the collection chamber includes a first recess disposed in the first surface.

In the above technical scheme, the first groove is formed on the first surface to form the collecting cavity, so that the production and the manufacturing are facilitated, the production efficiency of the second plate body is improved, and the production efficiency of the battery is improved.

In some embodiments, the first groove extends along a first direction, the first groove communicates with a row of through holes arranged at intervals along the first direction, and the first direction is perpendicular to a thickness direction of the first plate body.

According to the technical scheme, the row of through holes arranged at intervals along the first direction can guide the discharge of the same row of battery cells arranged along the first direction into the same first groove, and the row of battery cells arranged along the first direction can share the first groove, so that the number of grooves is reduced, and the manufacturing difficulty of the second plate body is reduced.

In some embodiments, the first grooves are provided in a plurality, and the first grooves are provided at intervals along a second direction, each first groove is communicated with a corresponding row of through holes, the second direction is perpendicular to the thickness direction of the first plate body, and the second direction intersects with the first direction.

In the above technical scheme, a plurality of first recesses are offered to the second plate body, and every first recess is used for corresponding a row of through-hole in order to collect the free emission of a row of battery, and a plurality of first recesses can be used for with the first through-hole one-to-one of multirow to collect the free emission of multirow battery, improve collection efficiency.

In some embodiments, the collection chamber further comprises a second groove disposed on the first surface, and two adjacent first grooves are communicated through the second groove.

In the above technical scheme, because the space of each first groove is limited, the emission in the first groove is too much, the temperature or pressure of the emission can not be timely released, and the adjacent first grooves are communicated through the second grooves, so that the temperature or pressure between the adjacent first grooves can be mutually relieved. Meanwhile, under the condition that the discharged materials are required to be discharged out of the bearing assembly, the number of the exhaust ports can be reduced after the adjacent first grooves are communicated.

In some embodiments, the first plate is bonded to the second plate.

In the above technical scheme, the first plate body and the second plate body can be manufactured in a split mode, so that through holes are conveniently machined in the first plate body independently, and a collecting cavity is formed in the second plate body. Meanwhile, the first plate body and the second plate body are bonded in a simple connection mode, and manufacturing difficulty is reduced.

In some embodiments, the first plate and the second plate are both insulating plates.

In some embodiments, the first plate body and the second plate body are both insulating plates, so that the risk of internal short circuit of the battery can be reduced.

In some embodiments, the first plate body is a fiberglass plate.

Among the above-mentioned technical scheme, glass fiber board not only has insulating properties, still has higher intensity, can promote the overall structure intensity of bearing assembly, provides the barrier propterty of bearing assembly to improve the reliability of battery.

In some embodiments, the material of the second plate body is polyurethane foam material or honeycomb material.

In the technical scheme, the second plate body is internally provided with more pore passages, the discharged matters can enter the first groove and the second groove, the discharged matters can also enter the pore passages, the porous structure can enhance the buffering effect on the impact force of the discharged matters, and meanwhile, the possibility of damage of the second plate body is reduced.

In some embodiments, the second plate is provided with an exhaust port in communication with the collection chamber to vent emissions collected in the collection chamber out of the carrier assembly.

In the above technical scheme, the capacity of the collecting cavity is limited, the exhaust port is arranged, and the discharged matter after relieving the pressure or the temperature can be discharged out of the bearing assembly, so that the bearing assembly can be recycled, and the discharged matter discharged out of the bearing assembly is relieved in the bearing assembly due to the temperature or the pressure, so that the loss degree of the discharged matter to the gas component in the battery can be greatly reduced even if the bearing assembly is discharged out.

In some embodiments, the second plate includes a first surface facing the first plate, a second surface facing away from the first plate, and a side connecting the first surface and the second surface, the exhaust port being disposed in the side.

In the above technical scheme, the exhaust port is arranged on the side surface of the second plate body, so that the exhaust is discharged from the side surface of the second plate body, and the influence of the exhaust on the battery monomer group borne by the bearing assembly can be reduced.

In some embodiments, the battery further comprises a case and a second pressure relief mechanism, the battery cell stack being disposed within the case; the second pressure release mechanism is arranged on the wall part of the box body, and the exhaust port is arranged at one end, close to the second pressure release mechanism, of the second plate body.

In the above technical scheme, the exhaust port is arranged at one end of the second plate body, which is close to the second pressure relief mechanism, so that the discharged matter can be rapidly discharged out of the battery box body from the shortest path when the second pressure relief mechanism is opened. The possibility that the exhaust port is arranged at other positions to cause the exhaust bypass to influence the battery monomer is reduced, and the reliability of the battery is improved.

In some embodiments, the carrier assembly further comprises a third plate, the third plate being located on a side of the second plate facing away from the first plate, the third plate being disposed in a stack with the second plate.

Among the above-mentioned technical scheme, three plate bodies set up between first plate body and second plate body, and the third plate body plays the guard action to the second plate body, can strengthen the bulk strength who bears the weight of the subassembly simultaneously.

In some embodiments, the collection chamber extends through the second plate in a thickness direction of the second plate.

In the above technical scheme, the collection cavity penetrates through the second plate body along the thickness direction of the second plate body, so that the size of the collection cavity can be increased, and the capacity of the collection cavity can be increased. Meanwhile, as the third plate body is arranged on one side, deviating from the first plate body, of the second plate body, even if the collecting cavity penetrates through the second plate body along the thickness direction of the second plate body, the side cannot be leaked due to discharging.

In some embodiments, the second plate is bonded to the third plate.

In the technical scheme, the second plate body and the third plate body can be manufactured in a split mode, the collecting cavity is formed on the second plate body alone, the third plate body is processed alone, and the second plate body and the third plate body are made of materials with different excellent performances. Meanwhile, the third plate body and the second plate body are bonded in a simple connection mode, and manufacturing difficulty is reduced.

In some embodiments, the third plate is an insulating plate.

In the above technical scheme, the third plate body can reduce the risk of internal short circuit of the battery.

In some embodiments, the third plate body is a fiberglass plate.

In some embodiments, the battery further comprises a case, the battery cell stack being disposed within the case; the box body comprises a bottom plate, and the third plate body is the bottom plate, or the third plate body is positioned between the bottom plate and the second plate body.

In the above technical scheme, if the third plate body is a bottom plate, the wall part of the box body is the third plate body, so that the material and the manufacturing procedure for independently manufacturing the third plate body can be omitted, and the cost is controlled. If the third plate body is located between bottom plate and the second plate body, the third plate body is connected with the bottom plate of box, and then the bottom intensity of battery is higher, and barrier propterty is better.

In some embodiments, the battery further includes a heat insulating layer disposed between the battery cell group and the first plate body, the heat insulating layer covering the through hole in a thickness direction of the first plate body.

Among the above-mentioned technical scheme, the insulating layer sets up between battery monomer group and first plate body, along the thickness direction of first plate body, and the insulating layer covers the through-hole, so, the insulating layer can separate the emission that gets into the collection chamber and the battery monomer that does not take place thermal runaway, makes the little or not transfer to the battery monomer that does not take place thermal runaway of heat that the emission carried in the collection chamber, reduces the emission to the influence of the battery monomer that does not take place thermal runaway.

In some embodiments, the material of the insulating layer is mica.

In the above technical scheme, set up mica paper or mica plate between battery monomer group and first plate body, when certain battery monomer takes place thermal runaway, the emission can break through mica paper or mica plate and get into the collection chamber from the through-hole that corresponds, and pressure and temperature of the emission of getting into the collection chamber constantly reduce, even the emission reaches other adjacent through-holes and also is difficult to break through mica paper or mica plate that the through-hole corresponds, therefore the emission is difficult to influence the battery monomer adjacent with thermal runaway battery monomer. Therefore, the heat insulation layer is mica paper or mica plate, so that the possibility that emissions of the battery cells in thermal runaway impact adjacent battery cells from other through holes of the first plate body through the collecting cavity can be reduced, and the risk of thermal runaway spreading is relieved.

In some embodiments, the thickness of the insulating layer is H, satisfying 0.2 mm.ltoreq.H.ltoreq.0.8 mm.

In the above technical scheme, the thickness of insulating layer is between 0.2mm to 0.8mm, and when battery monomer thermal runaway, the insulating layer can be just directly broken by battery monomer exhaust emission, and the insulating layer is difficult to be broken by alleviating temperature or pressure's emission simultaneously, and the insulating layer has played the effect of protecting with taking place the adjacent battery monomer of thermal runaway battery monomer, can alleviate thermal runaway and spread, improves the reliability of battery, extension battery life.

In some embodiments, 0.2 mm.ltoreq.H.ltoreq.0.5 mm.

In the technical scheme, the thickness of the heat insulation layer is between 0.2mm and 0.5mm, when the battery monomer is in thermal runaway, the heat insulation layer is easy to be directly broken by the discharged matter just discharged from the battery monomer, the possibility that the discharged matter enters the through hole due to the arrangement of the heat insulation layer is reduced, and the reliability of the battery is further improved.

In some embodiments, the battery further comprises a gel, at least a portion of the gel is filled between adjacent ones of the battery cells, and the battery cells are connected to the first plate body by the gel.

In the above technical scheme, at least a part of the colloid is filled between adjacent battery monomers, so that the structural strength of the battery monomer group can be enhanced, and the connection strength of the battery monomers and the first plate body can be enhanced through colloid connection, so that the overall structural strength of the battery is improved, and the structural stability of the battery is improved.

In some embodiments, an end of the battery cell remote from the first plate body is provided with an electrode terminal.

In some embodiments, the battery cells are cylindrical.

In some embodiments, the battery further comprises a thermal management component for regulating the temperature of the battery cells, the thermal management component being independent of the load bearing assembly.

In a second aspect, an embodiment of the present application further provides an electric device, where the electric device includes a battery provided by any embodiment of the first aspect, and the battery is used to provide electric energy for the electric device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

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

FIG. 3 is an exploded view of a battery cell according to some embodiments of the present application;

Fig. 4 is a schematic view of a battery cell provided with a first pressure release mechanism according to some embodiments of the present application;

FIG. 5 is an exploded view of a battery according to some embodiments of the present application;

FIG. 6 is a cross-sectional view of a battery according to some embodiments of the application;

FIG. 7 is a schematic view of a second plate according to some embodiments of the present application;

FIG. 8 is a schematic view of a second plate according to other embodiments of the present application;

FIG. 9 is a schematic view of a second plate according to some embodiments of the present application;

FIG. 10 is an enlarged view of FIG. 8 at A;

FIG. 11 is an enlarged view of the portion B of FIG. 8;

FIG. 12 is an exploded view of a battery according to further embodiments of the present application;

FIG. 13 is a schematic view of a carrier assembly and a case assembly according to still other embodiments of the present application;

FIG. 14 is an exploded view of a carrier assembly according to some embodiments of the present application;

FIG. 15 is a schematic view of a third plate of some embodiments of the application being a bottom plate of a box;

FIG. 16 is a schematic view of a third plate of some embodiments of the present application positioned between a base plate and a second plate;

FIG. 17 is an exploded view of a battery according to still further embodiments of the present application;

FIG. 18 is a schematic illustration of the thermal insulation principle of a thermal insulation layer according to some embodiments of the present application;

fig. 19 is an enlarged view at C shown in fig. 18.

Icon: 1000-vehicle; 200-motor; 300-a controller; 100-cell; 10-battery cell group; 11-battery cells; 111-a first pressure relief mechanism; 112-electrode terminals; 113-a housing; 114-an electrode assembly; 115-end cap; 20-a box body; 20 a-a first part; 20 b-a second part; 21-a receiving cavity; 22-a bottom plate; 23-side plates; 30-a carrier assembly; 31-a first plate; 311-through holes; 32-a second plate; 321-a first surface; 322-a second surface; 323-side; 324-collection chamber; 3241-a first groove; 3242-second groove; 325-exhaust port; 33-a third plate; 40-a second pressure relief mechanism; 50-a heat insulation layer; 60-thermal management components; x-a first direction; y-a second direction; z-thickness direction;

the figures are not drawn to scale.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description of the application and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion. The terms first, second and the like in the description and in the claims or in the above-described figures, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order.

Reference in the specification to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment 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.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "attached" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication 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 according to the specific circumstances.

In the description of the present application, it is to be noted that, unless otherwise indicated, the meaning of "plurality" is two or more; the terms "upper," "lower," "left," "right," "inner," "outer," and the like are merely used for convenience in describing the present application and to simplify the description, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The "vertical" is not strictly vertical but is within the allowable error range. "parallel" is not strictly parallel but is within the tolerance of the error.

The term "and/or" in the present application is merely an association relation describing the association object, and indicates that three kinds of relations may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In the present application, the character "/" generally indicates that the front and rear related objects are an or relationship.

In the embodiments of the present application, the same reference numerals denote the same components, and detailed descriptions of the same components are omitted in different embodiments for the sake of brevity. It should be understood that the thickness, length, width, etc. dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length, width, etc. dimensions of the integrated device, are merely illustrative and should not be construed as limiting the application in any way.

The term "plurality" as used herein refers to two or more (including two).

In the present application, the battery cell may include, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. The battery cells include, but are not limited to, cylinders, flat bodies, rectangular solids, or other shapes, etc. The battery cells generally comprise cylindrical battery cells, square battery cells, soft package battery cells and the like in a packaging mode.

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

The battery cell comprises an electrode assembly and electrolyte, wherein the electrode assembly consists of a positive plate, a negative plate and a separation membrane. The battery cell mainly relies on metal ions to move between the positive and negative electrode plates to operate. The positive plate comprises a positive electrode current collector and a positive electrode active material layer, wherein the positive electrode active material layer is coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protrudes out of the positive electrode current collector coated with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer is used as a positive electrode lug. Taking a lithium ion battery as an example, the material of the positive electrode current collector may be aluminum, and the positive electrode active material may be lithium cobaltate, lithium iron phosphate, ternary lithium, lithium manganate or the like. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer, wherein the negative electrode active material layer is coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protrudes out of the negative electrode current collector coated with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer is used as a negative electrode tab. 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 high current is passed without fusing, the number of positive electrode lugs is multiple and stacked together, and the number of negative electrode lugs is multiple and stacked together. The material of the separator may be PP (polypropylene) or PE (polyethylene). In addition, the electrode assembly may be a roll-to-roll structure or a lamination structure, and embodiments of the present application are not limited thereto.

The emissions of the battery cell referred to in the present application include, but are not limited to, electrolytes, dissolved or split positive and negative electrode sheets, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, and the like.

The pressure release mechanism on the battery monomer has an important influence on the safety of the battery. For example, when a short circuit, overcharge, etc. occur in the battery cell, thermal runaway occurs in the battery cell and thus pressure or temperature rises suddenly. In this case, the internal pressure, temperature and other emissions can be released outwards by actuation of the pressure release mechanism to prevent explosion and ignition of the battery cells. When the pressure release mechanism is actuated, high-temperature and high-pressure substances inside the battery cell are discharged outwards from the actuated position as emissions. In this way, the pressure and temperature of the battery cell can be relieved under the condition of controllable pressure or temperature, so that the occurrence of a potential serious accident is avoided.

The development of battery technology is taking into consideration various design factors such as energy density, cycle life, discharge capacity, charge-discharge rate and other performance parameters, and the reliability of the battery.

Along with the continuous development of the battery industry, the requirements on the reliability of the battery are higher and higher, particularly the problem of protection of the bottom of the battery and the problem of thermal runaway of the battery are solved, and the bottom protection is mainly used for coping with working conditions such as hollow impact, bottom scraping, broken stone impact and the like in the running process of the whole vehicle, and if the protection is not in place, the deformation and even cracking of battery monomers or other parts in an electric cavity can be possibly caused, so that the reliability of the battery is directly influenced, and the service life is influenced. The thermal runaway problem is considered to alleviate the thermal runaway spread and reduce potential hazards.

Therefore, for the battery, both the bottom protection and the thermal runaway protection of the battery are important.

In the related art, the pressure release mechanism is arranged in the battery cell to release high pressure and high heat inside the battery cell, namely, the exhaust is discharged to the outside of the battery cell. However, when the battery cells are out of control, flame, smoke, gas and the like are generated, and the discharged matters are discharged from the pressure release mechanism at the moment, and the discharged matters have stronger impact force along with high temperature and high pressure. With current drain, although the drain is timely drained, there is still a significant threat to other components within the battery when the drain is drained. For example, emissions directly impact the bottom of the battery case, affecting the bottom protection of the battery, impacting adjacent cells, causing thermal runaway propagation.

Therefore, it is critical to improve the reliability of the battery to consider both the problem of bottom protection and the problem of thermal runaway protection.

In view of this, in order to solve the problem that the reliability of the battery is insufficient and the protection of the bottom of the battery is insufficient. The embodiment of the application provides a technical scheme that a battery comprises a bearing component, wherein the bearing component is provided with a collecting cavity, the bearing component can be used for bearing a battery monomer and collecting the emission of the battery monomer, the collecting cavity is used for relieving the impact of the emission on a box body or other parts of the battery, the emission path of the emission is prolonged, the temperature or the pressure of the emission is relieved, the thermal runaway protection problem of the battery and the bottom protection problem of the battery are both considered, the reliability of the battery is improved to a greater extent, and the service life of the battery is prolonged.

The technical scheme described by the embodiment of the application is suitable for the battery and the electric equipment using the battery.

The electric equipment can be vehicles, mobile phones, portable equipment, notebook computers, ships, spacecrafts, electric toys, electric tools and the like. The vehicle can be a fuel oil vehicle, a fuel gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle or a range-extended vehicle; spacecraft including airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys, such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools, such as electric drills, power grinders, electric hammers, impact drills, concrete vibrators, electric planers, and the like. The embodiment of the application does not limit the electric equipment in particular.

For convenience of description, the following embodiments take the electric device as the vehicle 1000 as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application, a battery 100 is disposed in the vehicle 1000, and the battery 100 may be disposed 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 300 and a motor 200, the controller 300 being configured to control the battery 100 to power the motor 200, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the 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.

Referring to fig. 2, fig. 2 is an exploded view of a battery 100 according to some embodiments of the present application. The battery 100 includes a case 20 and a battery cell 11, and the battery cell 11 is accommodated in the case 20. The case 20 is used to provide the accommodating chamber 21 for the battery cell 11, and the case 20 may have various structures. In some embodiments, the case 20 may include a first portion 20a and a second portion 20b, the first portion 20a and the second portion 20b being mutually covered, the first portion 20a and the second portion 20b together defining a receiving chamber 21 for receiving the battery cell 11. The second portion 20b may have a hollow structure with an opening at one end, the first portion 20a may have a plate-like structure, and the first portion 20a covers the opening side of the second portion 20b, so that the first portion 20a and the second portion 20b together define the accommodating cavity 21; the first portion 20a and the second portion 20b may be hollow structures each having an opening at one side, and the opening side of the first portion 20a is covered with the opening side of the second portion 20 b. Of course, the case 20 formed by the first portion 20a and the second portion 20b may be rectangular parallelepiped.

In the battery 100, the number of the battery cells 11 may be plural, and the plural battery cells 11 may be connected in series, parallel, or series-parallel, and series-parallel refers to both of the plural battery cells 11 being connected in series and parallel. The plurality of battery cells 11 can be directly connected in series or in parallel or in series-parallel, and then the whole formed by the plurality of battery cells 11 is accommodated in the box body 20; of course, the battery 100 may also be a form of forming a battery 100 module by connecting a plurality of battery cells 11 in series or parallel or series-parallel connection, and then connecting a plurality of battery 100 modules in series or parallel or series-parallel connection to form a whole and accommodating the whole in the case 20. The battery 100 may further include other structures, for example, the battery 100 may further include a bus member for making electrical connection between the plurality of battery cells 11.

Wherein each battery cell 11 may be a secondary battery or a primary battery; but also lithium sulfur batteries, sodium ion batteries, magnesium ion batteries, and the like. The battery cell 11 may be flat, cylindrical, rectangular, or other shape, etc.

In some embodiments, the tank 20 may be part of the chassis structure of the vehicle 1000. For example, a portion of the tank 20 may become at least a portion of the floor of the vehicle 1000, or a portion of the tank 20 may become at least a portion of the cross and side rails of the vehicle 1000.

In some embodiments, battery 100 may also be used for an energy storage device. The energy storage device comprises an energy storage container, an energy storage electric cabinet and the like.

Referring to fig. 3, fig. 3 is an exploded view of a battery cell 11 according to some embodiments of the application. The battery cell 11 refers to the smallest unit constituting the battery 100. As shown in fig. 3, the battery cell 11 includes an end cap 115, a case 113, an electrode assembly 114, and other functional components.

The end cap 115 refers to a member that is covered at the opening of the case 113 to isolate the internal environment of the battery cell 11 from the external environment. The shape of the end cap 115 may be adapted to the shape of the housing 113 to fit the housing 113. Alternatively, the end cover 115 may be made of a material having a certain hardness and strength (such as an aluminum alloy), so that the end cover 115 is not easy to deform when being extruded and collided, so that the battery cell 11 can have a higher structural strength, and the stability can be improved. Some functional components, such as electrode terminals 112, may be provided on the end cap 115 to draw the electrodes out. In some embodiments, the end cap 115 may also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 11 when the internal pressure or temperature reaches a threshold. The end cap 115 may also be made of a variety of materials including, but not limited to, copper, iron, aluminum, stainless steel, aluminum alloys, plastics, etc. In some embodiments, insulation may also be provided on the inside of the end cap 115, which may be used to isolate electrical connection components within the housing 113 from the end cap 115 to reduce the risk of short circuits. By way of example, the insulation may be plastic, rubber, or the like.

The case 113 is an assembly for cooperating with the end cap 115 to form an internal environment of the battery cell 11, wherein the formed internal environment may be used to accommodate the electrode assembly 114, the electrolyte, and other components. The case 113 and the end cap 115 may be separate components, and an opening may be provided in the case 113, and the interior of the battery cell 11 may be formed by closing the end cap 115 at the opening. It is also possible to integrate the end cap 115 and the housing 113, specifically, the end cap 115 and the housing 113 may form a common connection surface before other components are put into the housing, and when the interior of the housing 113 needs to be sealed, the end cap 115 is then covered with the housing 113. The housing 113 may be of various shapes and sizes, such as a cylinder, a hexagonal prism, etc. Specifically, the shape of the case 113 may be determined according to the specific shape and size of the electrode assembly 114. The material of the housing 113 may be various, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

The electrode assembly 114 is a component in which electrochemical reactions occur in the battery cell 11. The case 113 may contain one or more electrode assemblies 114 therein. The electrode assembly 114 is formed primarily of wound placement of positive and negative electrode sheets, and typically has a separator disposed therebetween. The parts of the positive electrode plate and the negative electrode plate with active substances form the main part of the electrode assembly, and the parts of the positive electrode plate and the negative electrode plate without active substances form the electrode lugs respectively. The positive electrode tab and the negative electrode tab can be located at one end of the battery cell together or located at two ends of the battery cell respectively. During charge and discharge of the battery, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tab is connected to the electrode terminal 112 to form a current loop.

Referring to fig. 3 and 4, fig. 4 is a schematic diagram illustrating a first pressure release mechanism 111 provided for a battery cell 11 according to some embodiments of the present application. In some embodiments, the battery cell 11 is a cylinder, the battery cell 11 is provided with an electrode terminal 112 and a first pressure release mechanism 111, when the battery cell 11 is in use, the electrode terminal 112 and the first pressure release mechanism 111 are respectively located at two opposite sides of the height direction (parallel to the thickness direction Z below) of the battery 100, one side of the battery cell 11 provided with the electrode terminal 112 is a top, and the opposite side of the battery cell 11 provided with the electrode terminal is a bottom. In this way, the effluent may be discharged out of the cell 11 at the bottom of the cell 11. The impact of the emissions on some of the components disposed on top of the battery cells 11 is reduced.

Referring to fig. 5 and 6, fig. 5 is an exploded view of a battery 100 according to some embodiments of the present application; fig. 6 is a cross-sectional view of a battery 100 according to some embodiments of the application.

The embodiment of the application provides a battery 100, the battery 100 comprises a battery unit group 10 and a bearing assembly 30, the battery unit group 10 comprises a plurality of battery units 11, the bearing assembly 30 comprises a first plate 31 and a second plate 32 which are stacked, the first plate 31 is positioned between the battery unit group 10 and the second plate 32, and the first plate 31 is provided with a through hole 311. The second plate 32 is provided with a collecting chamber 324 communicating with the through hole 311; the end of the battery unit 11 near the first plate 31 is provided with a first pressure release mechanism 111, and the first pressure release mechanism 111 is disposed opposite to the through hole 311.

As illustrated in fig. 5, the battery cell group 10 includes a plurality of cells, and the plurality of battery cells 11 are arranged in a row along the first direction X and four rows along the second direction Y. Of course, in other embodiments, five rows, six rows, etc. are also possible.

The first pressure release mechanism 111 is a protective structure of the battery cell 11. The first pressure release mechanism 111 is disposed on a side of the battery cell 11 that is supported, and when the battery cell 11 is in use, a side of the battery cell 11 on which the first pressure release mechanism 111 is disposed is at the bottom. In the battery cell group 10, a part of the battery cells 11 may be provided with the first pressure release mechanism 111, and the other part of the battery cells 11 may not be provided with the first pressure release mechanism 111. The first pressure release mechanism 111 may be provided for each of the battery cells 11.

The first pressure release mechanism 111 may be a part of the housing 113, or may be a separate structure from the housing 113, for example, the first pressure release mechanism 111 is fixed to the housing 113 by welding. When the first pressure release mechanism 111 is a part of the case 113, for example, the first pressure release mechanism 111 may be formed by providing a score on the case 113, and the thickness of a position corresponding to the score may be smaller than the thickness of the other region of the first pressure release mechanism 111 than the score. The score is the weakest point of the first pressure relief mechanism 111. When a thermal runaway reaction occurs in the battery cell 11, the generated emissions are too much so that the internal pressure of the casing 113 rises and reaches a threshold value, or the internal temperature of the battery cell 11 rises and reaches a threshold value due to heat generated by the reaction in the battery cell 11, the first pressure release mechanism 111 may rupture at the notch to cause the inside and outside of the casing 113 to communicate, and the pressure and the temperature of the emissions are released outwards through the rupture of the first pressure release mechanism 111.

The carrying assembly 30 is used for carrying the battery cell assembly 10, that is, the carrying assembly 30 supports the battery cell assembly 10 and bears the pressure or weight of the battery cell assembly 10. When the battery 100 is in use, the bearing assembly 30 is located below the battery cell stack 10 along the thickness direction Z, and the battery cell stack 10 is located above the bearing assembly 30. The bearing assembly 30 has a certain thickness as a structure occupying a three-dimensional space, so that the bearing assembly 30 protects the battery cell stack 10 from the bearing side, thereby playing a role in protection.

The carrier assembly 30 includes a first plate 31 and a second plate 32, the first plate 31 being positioned between the battery cell stack 10 and the second plate 32, and the collecting chamber 324 is a structure formed at the second plate 32 for collecting the discharged material. The collection chamber 324 may be used to collect and release emissions. Of course, collection chamber 324 may also be used to extend the discharge path of the effluent such that the effluent passes through collection chamber 324 and the temperature or pressure of the effluent gradually decreases to further exit battery 100.

The through hole 311 is a structure for guiding the discharged material, which is formed in the first plate 31, so that the discharged material discharged from the first pressure release mechanism 111 can directly enter the collecting chamber 324. The shape of the through hole 311 may be circular, rectangular, or irregular, etc., and illustratively, in fig. 5, the through hole 311 is circular.

The first plate 31 and the second plate 32 may be bonded or welded together, or may be integrally formed.

The arrangement of the first pressure release mechanism 111 opposite to the through hole 311 means that along the thickness direction Z of the second plate 32, the projection of the first pressure release mechanism 111 at least partially overlaps with the through hole 311, so that the discharged material discharged from the first pressure release mechanism 111 can directly enter the through hole 311 and thus enter the collecting cavity 324, and the discharged material is impacted by the collecting cavity 324, so that the discharged material can be impacted little or not directly by other components in the battery 100.

In this embodiment, the first plate 31 is provided with the through hole 311, and the through hole 311 is opposite to the first pressure release mechanism 111, so that the effluent of the battery unit 11 directly enters the collecting cavity 324 of the second plate 32 through the through hole 311, and the collecting cavity 324 can collect the effluent and bear the impact of the effluent, so that the effluent can directly impact less or not directly impact other components in the battery 100. The bearing assembly 30 can be used for bearing the battery monomer 11, can be used for collecting the emission of the battery monomer 11 and relieving the impact of the emission, relieves the thermal runaway from spreading, gives consideration to the thermal runaway protection of the battery 100 and the protection problem of the bottom of the battery 100, improves the reliability of the battery 100 to a great extent, and prolongs the service life of the battery 100.

Referring to fig. 6, in some embodiments, along the thickness direction Z of the second plate 32, the projection of the first pressure release mechanism 111 falls into the through hole 311, and the projection of the battery cell 11 covers the through hole 311. For example, in the case where the battery cell 11 is a cylinder, the first pressure release mechanism 111 is a circle, and the through hole 311 is a round hole, the diameter of the through hole 311 is not smaller than the diameter of the first pressure release mechanism 111, and the diameter of the through hole 311 is not larger than the diameter of the battery cell 11. In this way, the possibility that the through hole 311 does not correspond to the first pressure release mechanism 111, resulting in that part of the discharged matter does not enter the collection chamber 324 through the through hole 311 can be reduced.

Referring to fig. 7 and 8, fig. 7 is a schematic structural view of a second plate 32 according to some embodiments of the present application; fig. 8 is a schematic structural view of a second plate 32 according to other embodiments of the present application. In some embodiments, the second plate 32 has a first surface 321 facing the first plate 31, and the collection cavity 324 includes a first groove 3241 disposed on the first surface 321.

The first groove 3241 is provided at the first surface 321 to form the collecting chamber 324, which facilitates manufacturing and improves the productivity of the second plate 32, thereby improving the productivity of the battery 100.

The first surface 321 is recessed to form a first groove 3241, the first groove 3241 is used for collecting emissions, and when the first plate 31 and the second plate 32 are stacked, the first groove 3241 is an inner space formed by enclosing the first plate 31 and the second plate 32.

The first groove 3241 may be manufactured through a punching process or a cutting process.

As shown in fig. 7, the second plate 32 has a long strip structure, and the first groove 3241 has a long strip shape. Of course, in other embodiments, the second plate 32 may be square rectangular (as shown in fig. 8) or shaped.

In some embodiments, the plurality of through holes 311 are arranged in a row at intervals along the first direction X, the first groove 3241 extends along the first direction X, the first groove 3241 communicates with the row of through holes 311 arranged at intervals along the first direction X, and the first direction X is perpendicular to the thickness direction Z of the first plate 31.

The row of through holes 311 arranged at intervals along the first direction X can correspond to the row of battery cells 11 arranged along the first direction X one by one, so that the diversion degree of the discharged matters is improved, and the discharged matters are guided into the collecting cavity 324 to a greater extent.

In this way, the row of through holes 311 arranged at intervals along the first direction X can guide the discharged material of the same row of battery cells 11 arranged along the first direction X into the same first groove 3241, and the row of battery cells 11 arranged along the first direction X can share the first groove 3241, so that the number of slots is reduced, and the manufacturing difficulty of the second plate 32 is reduced.

Referring to fig. 2 in combination with fig. 7 and 8, in some embodiments, the first grooves 3241 are provided in plurality, and the plurality of first grooves 3241 are disposed at intervals along the second direction Y, each first groove 3241 being in communication with a corresponding row of through holes 311, the second direction Y being perpendicular to the thickness direction Z of the first plate 31, the second direction Y intersecting the first direction X.

The size of each first groove 3241 in the first direction X may be different, and each first groove 3241 is adapted to the size of a row of battery cells 11 to collect the emissions of a row of battery cells 11.

The intersection of the second direction Y with the first direction X means that they may or may not be perpendicular to each other. Illustratively, in fig. 7 and 8, the first direction X and the second direction Y are perpendicular to each other.

The second plate 32 is provided with a plurality of first grooves 3241, each first groove 3241 is used for corresponding to one row of through holes 311 to collect the emissions of one row of battery cells 11, and the plurality of first grooves 3241 can be used for corresponding to the plurality of rows of through holes 311 one by one, so as to collect the emissions of the plurality of rows of battery cells 11, and improve the collection efficiency.

Referring to fig. 7 and 8, in some embodiments, the first grooves 3241 are provided in plurality, the plurality of first grooves 3241 are arranged at intervals along the second direction Y, each of the first grooves 3241 is independent from the other, and the plurality of first grooves 3241 are not communicated.

Referring to fig. 9, 10 and 11, fig. 9 is a schematic structural view of a second plate 32 according to some embodiments of the present application; FIG. 10 is an enlarged view of FIG. 8 at A; fig. 11 is an enlarged view at B shown in fig. 8. In some embodiments, the collection chamber 324 further includes a second groove 3242 disposed on the first surface 321, with adjacent two of the first grooves 3241 communicating via the second groove 3242.

Illustratively, as shown in fig. 9, the second grooves 3242 communicate adjacent first grooves 3241 to form a serpentine reciprocating S-shape.

Because of the limited space of each first groove 3241, if there is excessive emissions in one first groove 3241, the temperature or pressure of the emissions cannot be timely discharged. Adjacent first grooves 3241 are communicated through second grooves 3242, so that the adjacent first grooves 3241 can mutually relieve the temperature or pressure of the discharged matter. Meanwhile, in the case where it is required to discharge the exhaust out of the carrier assembly 30, the number of the exhaust ports 325 (described later) may be reduced after the adjacent first grooves 3241 are communicated.

In some embodiments, the first plate 31 is bonded to the second plate 32. Thus, the first plate 31 and the second plate 32 may be manufactured separately, so that the through holes 311 are formed in the first plate 31 separately, and the collecting chamber 324 is formed in the second plate 32. Meanwhile, the first plate 31 and the second plate 32 are bonded in a simple connection mode, so that the manufacturing difficulty is reduced.

In some embodiments, the first plate 31 and the second plate 32 are both insulating plates. In this way, the risk of internal short circuits of battery 100 can be reduced.

The insulating plate may be a glue plate.

In some embodiments, the first plate 31 is a fiberglass plate. The glass fiber board not only has insulating property, but also has higher strength, can promote the overall structural strength of the bearing assembly 30, and provides the protection performance of the bearing assembly 30, thereby improving the reliability of the battery 100.

In some embodiments, the material of the second plate 32 is polyurethane foam or honeycomb. In the second plate body 32 made of polyurethane foam or honeycomb material, the second plate body 32 is internally provided with more pore channels, and the discharged materials can enter the first groove 3241 and the second groove 3242, and can also enter the pore channels, so that the porous structure can enhance the buffering effect on the impact force of the discharged materials, the temperature or the pressure of the discharged materials can be accelerated and relieved, and the possibility of damage of the second plate body 32 is reduced.

In some embodiments, the second plate 32 is provided with a vent 325, the vent 325 communicating with the collection chamber 324 to vent emissions collected within the collection chamber 324 out of the carrier assembly 30.

The exhaust ports 325 may be in one-to-one correspondence with the first grooves 3241, i.e., one first groove 3241 versus one exhaust port 325. Of course, one exhaust port 325 may be provided at each end of the first groove 3241 along the first direction X to increase the discharge speed of the discharged material (as shown in fig. 9 to 11). Even in the case where the first grooves 3241 communicate with each other, only one exhaust port 325 may be provided to reduce the number of exhaust ports 325, lengthen the exhaust path of the exhaust, further relieve the temperature and pressure of the exhaust, and then direct the exhaust out of the carrier assembly 30 from one exhaust port 325, further reduce the risk that the exhaust out of the carrier assembly 30 affects other components in the battery 100 when the temperature and pressure of the exhaust are not low enough.

The exhaust port 325 may have a circular, rectangular, oval, or other shape, and the exhaust port 325 may be formed on the first surface 321 or on another surface connected to the first surface 321.

The capacity of the collection chamber 324 is limited, and the exhaust port 325 is provided to exhaust the exhaust discharged after relieving the pressure or temperature from the carrier assembly 30, so that the carrier assembly 30 can be recycled, and the exhaust discharged from the carrier assembly 30 is relieved in the carrier assembly 30 due to the temperature or pressure, so that the loss degree of the exhaust to other components in the battery 100 is greatly reduced even if the exhaust is discharged from the carrier assembly 30.

It should be noted that, the impact force of the exhaust discharged from the first pressure release mechanism 111 is in the millisecond-scale speed, that is, the impact force is strongest at the moment of discharging the exhaust, and the second plate 32 receives the impact force after the exhaust enters the collecting chamber 324, and then the impact force of the exhaust declines. Therefore, as long as the impact force is relieved through the collecting chamber 324 at the moment of discharge, the effect of relieving the temperature or pressure of the discharge can be achieved, the possibility of damaging other components of the battery 100 can be reduced, and the reliability of the battery 100 can be improved.

Referring to fig. 10 and 11, in some embodiments, the second plate 32 includes a first surface 321 facing the first plate 31, a second surface 322 facing away from the first plate 31, and a side 323 connecting the first surface 321 and the second surface 322, and the exhaust port 325 is disposed at the side 323.

The exhaust ports 325 are disposed on the side 323 of the second plate 32, so that the exhaust emissions from the side 323 of the second plate 32 can be easily discharged, and the influence of the exhaust emissions on the battery cell stack 10 carried by the carrier assembly 30 can be reduced.

Referring to fig. 12 and 13, fig. 12 is an exploded view of a battery 100 according to still other embodiments of the present application; fig. 13 is a schematic view of a carrier assembly 30 assembled with a case 20 according to still other embodiments of the present application.

In some embodiments, the battery 100 further includes a case 20 and a second pressure release mechanism 40, and the battery cell group 10 is disposed in the case 20; the second pressure release mechanism 40 is disposed on a wall of the case 20, and the exhaust port 325 is disposed at an end of the second plate 32 near the second pressure release mechanism 40.

The second pressure release mechanism 40 is a member for releasing the exhaust discharged from the carrier assembly 30 to the outside of the battery, and the second pressure release mechanism 40 has a valve body structure, and may be a one-way valve or a two-way valve. The second pressure release mechanism 40 includes a valve seat and a valve core, the valve seat is used for installing the second pressure release mechanism 40 on a wall portion of the case 20, the valve core has a valve clack, and the valve clack can be opened and closed, so that the case 20 is closed or opened, the case 20 can be opened to discharge the discharged materials out of the case 20, and the case 20 is closed after the discharged materials are discharged.

In some embodiments, the second pressure relief mechanism 40 is an explosion proof valve.

It should be understood that the side 323 of the second plate 32 provided with the exhaust port 325 may not be connected to the case 20 of the battery 100, that is, a certain gap may exist between the side 323 and the case 20. As shown in fig. 13, a certain gap is formed between the periphery of the second plate 32 and the side wall of the case 20, so that the exhaust port 325 is provided at the side 323 of the second plate 32 to discharge the discharged material.

The exhaust port 325 is provided at an end of the second plate 32 near the second pressure relief mechanism 40 such that the exhaust is rapidly discharged from the case 20 of the battery 100 through the shortest path when the second pressure relief mechanism 40 is opened. Reducing the likelihood that the exhaust ports 325 are disposed elsewhere, resulting in exhaust bypassing affecting the battery cells 11 or other components, is beneficial for improving the reliability of the battery 100.

Referring to fig. 14, fig. 14 is an exploded view of a carrier assembly 30 according to some embodiments of the present application. In some embodiments, the bearing assembly 30 further includes a third plate 33, the third plate 33 is located on a side of the second plate 32 facing away from the first plate 31, and the third plate 33 is stacked with the second plate 32.

Understandably, the second plate 32 is disposed between the first plate 31 and the third plate 33, and the third plate 33 protects the second plate 32, and can enhance the overall strength of the bearing assembly 30.

Referring to fig. 14, in some embodiments, the carrier assembly 30 includes a third plate 33 with a collection chamber 324 extending through the second plate 32 in a thickness direction Z of the second plate 32.

The collecting cavity 324 penetrates through the second plate 32 along the thickness direction Z of the second plate 32, so that the size of the collecting cavity 324 in the Z direction can be increased, and the capacity of the collecting cavity 324 can be increased. Meanwhile, since the third plate 33 is disposed at a side of the second plate 32 facing away from the first plate 31, even if the collecting chamber 324 penetrates the second plate 32 in the thickness direction Z of the second plate 32, the discharged material does not leak from the side.

In some embodiments, the second plate 32 is bonded to the third plate 33.

Thus, the second plate 32 and the third plate 33 can be manufactured separately, so that the collecting cavity 324 is formed on the second plate 32 alone, the third plate 33 is processed alone, and the second plate 32 and the third plate 33 can be made of materials with different excellent performances. Meanwhile, the third plate 33 and the second plate 32 are bonded in a simple connection mode, so that the manufacturing difficulty is reduced.

In some embodiments, the third plate 33 is an insulating plate.

In the above-described embodiments, the third plate 33 can reduce the risk of internal short circuits of the battery 100.

In some embodiments, the third plate 33 is a fiberglass plate. The glass fiber board not only has insulating property, but also has higher strength, can promote the overall structural strength of the bearing assembly 30, and provides the protection performance of the bearing assembly 30, thereby improving the reliability of the battery 100.

In some embodiments, the first plate 31, the second plate 32, and the third plate 33 are bonded together.

In some embodiments, the first plate 31 and the third plate 33 are both fiberglass plates.

Referring to fig. 15 and 16, fig. 15 is a schematic view of a third plate 33 of some embodiments of the present application being a bottom plate 22 of a case 20; fig. 16 is a schematic view of a third plate 33 according to some embodiments of the present application positioned between the base 22 and the second plate 32.

Referring to fig. 15 and 16, in some embodiments, the battery 100 further includes a case 20, and the battery cell stack 10 is disposed within the case 20. The case 20 includes a bottom plate 22, and the third plate 33 is the bottom plate 22, or the third plate 33 is located between the bottom plate 22 and the second plate 32.

The case 20 is used for accommodating the battery cell group 10, and as shown in fig. 15 and 16, the case 20 includes a bottom plate 22 and a side plate 23 surrounding the bottom plate 22, and the bottom plate 22 and the side plate 23 are surrounded to form an accommodating chamber 21 accommodating the battery cell group 10.

In some embodiments, as shown in fig. 15, the third plate 33 is the bottom plate 22, that is, in the embodiment shown in fig. 15, the bottom plate 22 of the case 20 is taken as the third plate 33. The bottom plate 22, the second plate 32 and the first plate 31 of the case 20 may be bonded together, and the second surface 322 of the second plate 32 may be bonded to the bottom plate 22, so that a material and a manufacturing process for separately manufacturing the third plate 33 may be omitted, and the cost may be controlled.

In some embodiments, as shown in fig. 16, the third plate 33 is located between the bottom plate 22 and the second plate 32, and the third plate 33 is connected to the bottom plate 22 of the case 20, so that the bottom of the battery 100 has higher strength and better protection performance.

Referring to fig. 17 and 12, fig. 17 is an exploded view of a battery 100 according to still other embodiments of the present application. In some embodiments, the battery 100 further includes a thermal insulation layer 50, the thermal insulation layer 50 is disposed between the battery cell group 10 and the first plate 31, and the thermal insulation layer 50 covers the through hole 311 along the thickness direction Z of the first plate 31.

It is understood that the thermal insulation layer 50 is disposed between the battery cell 11 and the first plate 31, and the thermal insulation layer 50 is disposed between the first pressure release mechanism 111 and the first plate 31. The thermal barrier 50 is capable of isolating the effluent entering the collection chamber 324 from the cells 11 that are not thermally incontrollable, such that little or no heat carried by the effluent within the collection chamber 324 is transferred to the cells 11 that are not thermally incontrollable.

All the through holes 311 may be covered with one whole insulating layer 50, or a plurality of insulating layers 50 may be used, each insulating layer 50 covering a plurality of through holes 311, and a plurality of insulating layers may be combined so as to cover all the through holes 311. Of course, only one through hole 311 may be covered by one insulating layer 50, and at this time, the insulating layer 50 corresponds to the through hole 311 one by one.

The heat insulation layer 50 may be disposed between the battery cell 11 provided with the first pressure release mechanism 111 and the first plate 31, and the heat insulation layer 50 is not disposed between the battery cell 11 and the first plate 31 where the first pressure release mechanism 111 is not disposed, where the heat insulation layer 50 is disposed, the heat insulation layer 50 may alleviate the impact of the discharge collected in the collection cavity 324 on the battery cell 11 at the position corresponding to the heat insulation layer 50. Of course, a whole insulating layer 50 may be provided to directly separate the battery cell stack 10 from the first plate 31 (as shown in fig. 17).

The heat insulation layer 50 is disposed between the battery cell group 10 and the first plate 31, and along the thickness direction Z of the first plate 31, the heat insulation layer 50 covers the through hole 311, so that the heat insulation layer 50 can isolate the discharged material entering the collecting cavity 324 from the battery cell 11 which is not subject to thermal runaway, so that the heat carried by the discharged material in the collecting cavity 324 is less transferred or not transferred to the battery cell 11 which is not subject to thermal runaway, and the influence of the discharged material on the battery cell 11 which is not subject to thermal runaway is reduced.

In some embodiments, the material of the insulating layer 50 is mica.

Mica is a common name of mica group minerals, and is aluminosilicate of metals such as potassium, aluminum, magnesium, iron, lithium, and the like. The mica material has very high insulation and heat insulation performance, good chemical stability and strong acid, alkali and pressure resistance. The insulating layer 50 made of mica material has not only insulating properties but also insulating properties.

Referring to fig. 18, fig. 18 is a schematic illustration of the thermal insulation principle of a thermal insulation layer 50 according to some embodiments of the present application, in some embodiments, the thermal insulation layer 50 is mica paper or mica board.

The mica paper or mica plate is made of crushed mica or mica powder as raw material through pulp, paper making, shaping, squeezing and other processes.

When thermal runaway of the battery cell 11 occurs, the exhaust of the battery cell 11 can break through the mica paper or mica board after being discharged from the first pressure release mechanism 111, as shown in fig. 18, the flow direction of the exhaust is shown by arrows in fig. 18. When one cell 11a undergoes thermal runaway, its emissions can break through the mica paper or mica board and enter the collection chamber 324 from the through hole 311a, then diffuse within the collection chamber 324, flowing toward the adjacent through hole 311b and through hole 311c. Since the discharge reaches the through holes 311b and 311c through a certain path, the pressure and temperature of the discharge reaching the through holes 311b and 311c may be smaller than the temperature and pressure of the discharge entering from the through holes 311a, and the impact force of the discharge reaching the through holes 311b and 311c may be smaller than the impact force of the discharge entering from the through holes 311 a. The discharge easily breaks the mica paper or mica plate from the through hole 311a into the collecting chamber 324, and does not easily reverse the breaking of the mica paper or mica plate at the through hole 311b and the through hole 311c, and thus does not easily strike the battery cell 11b corresponding to the through hole 311b and the battery cell 11c corresponding to the through hole 311c. The mica paper or mica plate protects the adjacent battery cell 11b and the battery cell 11c from thermal runaway, thereby alleviating the thermal runaway and further improving the reliability of the battery.

When thermal runaway occurs in a certain battery cell 11, the mica paper or mica plate is arranged between the battery cell group 10 and the first plate 31, and the emission can break through the mica paper or mica plate, so that the emission enters the collecting cavity 324 from the corresponding through hole 311, the pressure and the temperature of the emission entering the collecting cavity 324 are continuously reduced, and even if the emission reaches the other adjacent through holes 311, the emission is not easy to break through the mica paper or mica plate corresponding to the other through holes 311, so that the emission is not easy to influence the battery cell 11 adjacent to the thermal runaway battery cell 11. Accordingly, the heat insulating layer 50 is mica paper or mica board, which can reduce the possibility that the emissions of the thermal runaway battery cells 11 strike the adjacent battery cells 11 from the other through holes 311 of the first plate body 31 through the collecting chamber 324, and mitigate the risk of thermal runaway spreading.

Referring to FIG. 19, FIG. 19 is an enlarged view of FIG. 18 at C, and in some implementations, the insulating layer 50 has a thickness H, satisfying 0.2 mm.ltoreq.H.ltoreq.0.8 mm.

The thickness of the insulating layer 50 may be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc., as all values between 0.2 and 0.8mm cannot be exhaustive, and any value in the middle may be understood as the thickness of the insulating layer 50 by way of example.

The thickness of insulating layer 50 is between 0.2mm and 0.8mm, and when battery cell 11 thermal runaway, insulating layer 50 can be directly broken by the emission that just discharges from battery cell 11, and insulating layer 50 is difficult to be broken by the emission reverse direction that has alleviated temperature or pressure simultaneously, and insulating layer 50 has played the effect of protecting the adjacent battery cell 11 with taking place thermal runaway battery cell 11, can alleviate thermal runaway and spread, improves battery 100's reliability, extension battery 100 life.

In some embodiments, 0.2 mm.ltoreq.H.ltoreq.0.5 mm.

The thickness of the insulating layer 50 may be 0.2mm, 0.3mm, 0.4mm, 0.5mm, etc., as all values between 0.2 and 0.5mm cannot be exhaustive, and it is understood that any value in the middle may be used as the thickness of the insulating layer 50, by way of example only.

The thickness of the heat insulating layer 50 is between 0.2mm and 0.5mm, and when the battery cell 11 is thermally out of control, the heat insulating layer 50 is easily broken by the exhaust immediately after being discharged from the battery cell 11, so that the possibility that the exhaust enters the through hole 311 due to the arrangement of the heat insulating layer 50 is reduced, and the reliability of the battery 100 is further improved.

In some implementations, the battery 100 further includes a gel, at least a portion of the gel is filled between adjacent battery cells 11, and the battery cells 11 are connected to the first plate 31 through the gel.

At least a portion of the colloid is filled between adjacent battery monomers 11 to enhance the structural strength of the battery monomer group 10, and the connection strength of the battery monomers 11 and the first plate 31 can be enhanced by the connection of the battery monomers 11 and the first plate 31 through the colloid, so that the overall structural strength of the battery 100 is improved, and the structural stability of the battery 100 is improved.

In some embodiments, the gel may fill gaps within the battery 100 other than the battery cell stack 10, the carrier assembly 30, and other components. In the case that the side surface of the second plate 32 is provided with the air vent 325, the glue should avoid the air vent 325. In the case where the battery 100 includes the case 20 and the case 20 is provided with the second pressure relief mechanism 40, the gel should avoid the path of the exhaust port 325 corresponding to the second pressure relief mechanism 40, and reduce the risk of the gel affecting the path of the exhaust from the exhaust port 325 to the second pressure relief mechanism 40.

In some embodiments, the gel is a foam.

In some embodiments, an electrode terminal 112 is disposed at an end of the battery cell 11 away from the first plate 31, and a first pressure release mechanism 111 is disposed at an end of the battery cell 11 near the first plate 31.

In some embodiments, the battery cell 11 is cylindrical.

Referring to fig. 17 and 13, in some embodiments, battery 100 further includes a thermal management component 60, thermal management component 60 being used to regulate the temperature of battery cells 11, thermal management component 60 being independent of carrier assembly 30.

The thermal management component 60 is for containing a fluid to regulate the temperature of the plurality of battery cells 11. The fluid may be a liquid or a gas, and the temperature adjustment means heating or cooling the plurality of battery cells 11. In the case of cooling or lowering the temperature of the battery cells 11, the thermal management member 60 is used to contain a cooling fluid to lower the temperature of the plurality of battery cells 11, and at this time, the thermal management member 60 may also be referred to as a cooling member, a cooling system, a cooling plate, or the like, and the fluid contained therein may also be referred to as a cooling medium or cooling fluid, and more specifically, may be referred to as a cooling liquid or cooling gas. In addition, the thermal management component 60 may also be used for heating to warm up the plurality of battery cells 11. Alternatively, the fluid may be circulated to achieve better temperature regulation. Alternatively, the fluid may be water, a mixture of water and ethylene glycol, or air, etc.

As shown in fig. 17, the battery cell 11 is a cylinder, and the thermal management member 60 is provided on a large surface of the battery cell 11 to regulate the temperature of the battery cell 11.

The thermal management component 60 is disposed on the large surface of the battery cell 11 to regulate the temperature of the battery cell 11, the bearing component 30 is used for improving the bottom protection performance and the thermal runaway protection performance of the battery 100 at the bottom of the battery cell group 10, the thermal management component 60 and the bearing component 30 are independent, and the comprehensive performance of the battery 100 is better.

The embodiment of the application also provides electric equipment, which comprises the battery 100 provided by any embodiment, wherein the battery 100 is used for providing electric energy for the electric equipment.

The embodiment of the application further provides a battery 100, where the battery 100 includes a battery unit group 10 and a bearing assembly 30, the battery unit group 10 includes a plurality of battery units 11 arranged along a first direction X, and the battery units 11 are cylinders. The carrier assembly 30 comprises a first plate 31, a second plate 32 and a third plate 33 arranged in a stack, the first plate 31 being provided with a through hole 311, the second plate 32 being provided with a collecting chamber 324 communicating with the through hole 311. One end of the battery cell 11, which is far away from the first plate 31, is provided with an electrode terminal 112, one end of the battery cell 11, which is close to the first plate 31, is provided with a first pressure release mechanism 111, and the first pressure release mechanism 111 is arranged opposite to the through hole 311. The first plate 31, the second plate 32 and the third plate 33 are bonded. The collecting chamber 324 includes a second groove 3242 and a first groove 3241 extending in a first direction X, the first groove 3241 being provided in plurality in a second direction Y, the first direction X being perpendicular to the second direction Y, adjacent two grooves being communicated through the second groove 3242. The second plate 32 includes a first surface 321 facing the first plate 31, a second surface 322 facing away from the first plate 31, and a side 323 connecting the first surface 321 and the second surface 322, a first groove 3241 is formed on the first surface 321, a second groove 3242 is formed on the first surface 321, and the side 323 is provided with an air outlet 325.

It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

The above embodiments are only for illustrating the technical solution of the present application, and are not intended to limit the present application, and various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery, comprising:

a battery cell group including a plurality of battery cells;

The bearing assembly is used for bearing the battery cell group and comprises a first plate body and a second plate body which are arranged in a stacked mode, the first plate body is positioned between the battery cell group and the second plate body, the first plate body is provided with a through hole, and the second plate body is provided with a collecting cavity communicated with the through hole;

The battery pack comprises a battery body, a first plate body and a through hole, wherein a first pressure release mechanism is arranged at one end, close to the first plate body, of the battery body, and the first pressure release mechanism is arranged opposite to the through hole.

2. The battery of claim 1, wherein the second plate has a first surface facing the first plate, and the collection cavity comprises a first recess disposed in the first surface.

3. The battery of claim 2, wherein the first groove extends in a first direction, the first groove communicates with a row of the through holes arranged at intervals along the first direction, and the first direction is perpendicular to a thickness direction of the first plate body.

4. A battery according to claim 3, wherein a plurality of the first grooves are provided, the plurality of the first grooves being provided at intervals along a second direction, each of the first grooves being in communication with a corresponding row of the through holes, the second direction being perpendicular to a thickness direction of the first plate body, the second direction intersecting the first direction.

5. The battery of claim 4, wherein the collection chamber further comprises a second groove disposed on the first surface, adjacent two of the first grooves communicating via the second groove.

6. The battery of any of claims 1-5, wherein the first plate is bonded to the second plate.

7. The battery of any one of claims 1-5, wherein the first plate and the second plate are both insulating plates.

8. The battery of claim 7, wherein the first plate body is a fiberglass plate.

9. The battery according to claim 7, wherein the material of the second plate body is polyurethane foam or honeycomb.

10. The battery of any one of claims 1-5, wherein the second plate is provided with a vent in communication with the collection chamber to vent emissions collected in the collection chamber out of the carrier assembly.

11. The battery of claim 10, wherein the second plate includes a first surface facing the first plate, a second surface facing away from the first plate, and a side connecting the first surface and the second surface, the vent being disposed in the side.

12. The battery of claim 10, wherein the battery further comprises:

The battery monomer set is arranged in the box body;

The second pressure release mechanism is arranged on the wall part of the box body, and the exhaust port is arranged at one end of the second plate body, which is close to the second pressure release mechanism.

13. The battery of any of claims 1-5, wherein the carrier assembly further comprises a third plate positioned on a side of the second plate facing away from the first plate, the third plate being stacked with the second plate.

14. The battery of claim 13, wherein the collection chamber extends through the second plate in a thickness direction of the second plate.

15. The battery of claim 13, wherein the second plate is bonded to the third plate.

16. The battery of claim 13, wherein the third plate is an insulating plate.

17. The battery of claim 16, wherein the third plate body is a fiberglass plate.

18. The battery of claim 13, wherein the battery further comprises:

The battery monomer set is arranged in the box body;

The box body comprises a bottom plate, and the third plate body is the bottom plate, or the third plate body is positioned between the bottom plate and the second plate body.

19. The battery of any one of claims 1-5, further comprising a thermal insulating layer disposed between the battery cell stack and the first plate, the thermal insulating layer covering the through-holes in a thickness direction of the first plate.

20. The battery of claim 19, wherein the insulating layer is made of mica.

21. The battery of claim 19, wherein the insulating layer has a thickness H, satisfying 0.2mm +.h +.0.8 mm.

22. The cell defined in claim 21, wherein 0.2mm +.h +.0.5 mm.

23. The battery of any one of claims 1-5, further comprising a gel, at least a portion of the gel being filled between adjacent ones of the cells, the cells being connected to the first plate by the gel.

24. The battery according to any one of claims 1 to 5, wherein an end of the battery cell remote from the first plate body is provided with an electrode terminal.

25. The battery of any one of claims 1-5, wherein the cells are cylindrical.

26. The battery of any of claims 1-5, further comprising a thermal management component for regulating the temperature of the battery cells, the thermal management component being independent of the carrier assembly.

27. A powered device comprising the battery of any of claims 1-26, the battery configured to provide electrical energy to the powered device.