CN218586191U - Batteries and electrical devices - Google Patents

Abstract

The application discloses a battery and a power consumption device. The battery in the embodiment of the application comprises a box body, a battery monomer and a protection assembly. The tank has a first wall. Battery monomer, including pressure release mechanism, battery monomer locates in the box, and pressure release mechanism sets up towards first wall. The protection component is arranged on one side, facing the battery monomer, of the box body, and at least part of the protection component is arranged between the pressure relief mechanism and the first wall. Wherein, the value range of the thermal protection index Q of the protection component is as follows: q is more than or equal to 13 and less than or equal to 35. Through setting up protective assembly and blockking spun high temperature material in to pressure release mechanism, prevent to cause the damage to the battery box, guarantee battery normal operating to through the thickness that sets up the minimum interval between reasonable protective assembly and the pressure release mechanism and protective assembly itself, can be when guaranteeing the protecting effect, the safeguard function of rational utilization battery inner space and performance protective assembly itself.

Description

Batteries and electrical devices

technical field

The present application relates to the field of batteries, in particular to a battery and an electrical device.

Background technique

Batteries are widely used in various electronic devices, such as mobile phones, laptop computers, battery cars, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes and electric tools, etc. Batteries can include nickel-cadmium batteries, nickel-hydrogen batteries, lithium-ion batteries, and secondary alkaline zinc-manganese batteries, among others.

At present, how to improve the safety performance of batteries is one of the research focuses in this field.

Utility model content

In view of the above problems, the present application provides a battery and an electrical device, which can reduce the damage to the battery pack caused by the high-temperature liquid sprayed from the pressure relief mechanism, and improve the safety performance of the battery.

In a first aspect, the present application provides a battery, including a case, a battery cell, and a protective assembly. The box has a first wall. The battery cell includes a pressure release mechanism, the battery cell is arranged in the box, and the pressure release mechanism is arranged toward the first wall. The protective assembly is arranged on the side of the box facing the battery cells, and at least part of the protective assembly is arranged between the pressure relief mechanism and the first wall. Wherein, the thermal protection index Q of the protective component and the minimum distance H between the pressure relief mechanism and the thickness T of the protective component satisfy the relationship: Q=H+10*T, and the value range of the thermal protection index is 13≤Q≤35.

In the technical solution of the embodiment of the present application, the high-temperature substances ejected from the pressure relief mechanism are blocked by setting the protective component to prevent damage to the battery box and ensure the normal operation of the battery, and by setting a reasonable protective component and the pressure relief mechanism The minimum distance between them and the thickness of the protective component itself can ensure the protective effect while rationally using the internal space of the battery and exerting the protective function of the protective component itself.

In some embodiments, the value range of the minimum distance H is: 3mm≤H≤10mm. Different minimum spacing can be set according to the capacity of different battery cells to expand the scope of use.

In some embodiments, the value of the capacity R of the battery cell is: 50Ah<R<100Ah, and the value range of the thickness T of the protective component is: 0.3mm≤T≤1.2mm. When the capacity of the battery cell is small, the thickness of the corresponding protective component can be relatively reduced, so as to reduce the space occupied by the protective component or reduce the weight of the protective component.

In some embodiments, the value of the capacity R of the battery cell is: 100Ah≤R≤200Ah, and the value range of the thickness T of the protective component is: 0.8mm≤T≤2.0mm.

In some embodiments, the value of the capacity R of the battery cell is: 200Ah<R≤300Ah, and the value range of the thickness T of the protective component is: 1.2mm≤T≤2.5mm. When the capacity of the battery cell is large, the corresponding thickness of the protective component is set thicker, which can reduce the minimum distance between the pressure relief mechanism and the protective plate, and reduce the space occupied by the protective structure.

In some embodiments, the battery cell is covered with an insulator, and the insulator is disposed between the battery cell and the protective component. Set the insulation to ensure the safety performance of the battery cell.

In some embodiments, the protective assembly includes a protective plate and a first connecting piece, the first connecting piece is arranged along the circumference of the protective plate to connect the protective plate with the inner wall of the box or the battery cell, and the first connecting piece is arranged along the battery cell The thickness of the body in the height direction is H, and a protective space is formed between the first connecting piece and the protective plate. By setting the first connecting piece to form a gap between the protective plate and the battery cell, the structure is simple and the connection is stable.

In some embodiments, the first connecting part includes insulating foam disposed between the insulating part and the protective plate. Insulating foam has good insulation, flame retardant and heat insulation effects, which can further improve the protective effect.

In some embodiments, there is a gap between the orthographic projection of the first connecting member on the battery cell and the pressure relief mechanism. The staggered setting between the first connecting piece and the pressure relief mechanism can prevent the outlet of the pressure relief mechanism from being blocked and ensure the normal discharge of liquid.

In some embodiments, the first connecting member includes a connecting screw, and the connecting screw connects the protective plate and the box body.

In some embodiments, the protective plate includes a mica plate. Mica board is cheap and has good flame retardant effect.

In some embodiments, the protective plate includes: a reinforcing part and a connecting part. The reinforcing part is arranged corresponding to the pressure relief mechanism; the connecting part is arranged around the reinforcing part, wherein the thickness of the reinforcing part is greater than that of the connecting part. By setting the reinforcing part, it is possible to carry out key protection on the part of the protection component corresponding to the pressure relief mechanism, and improve the protection effect.

In some embodiments, the orthographic projection of the reinforcing portion on the battery cell covers the pressure relief mechanism. The above-mentioned structure can effectively block the liquid ejected from the pressure relief mechanism and improve the protection efficiency.

In a second aspect, the present application also provides an electric device, the electric device includes the battery in the above embodiment, and the battery is used to provide electric energy.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

The features, advantages, and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application;

Fig. 2 is a schematic explosion diagram of a battery provided by some embodiments of the present application;

Fig. 3 is an explosion schematic diagram of a battery cell in a battery provided by some embodiments of the present application;

Fig. 4 is a schematic explosion diagram of batteries provided by other embodiments of the present application;

Fig. 5 is a schematic diagram of the minimum distance between the protective component and the battery cell provided by some embodiments of the present application;

Fig. 6 is a schematic structural diagram of a protective assembly provided by some embodiments of the present application;

Fig. 7 is a schematic cross-sectional structure diagram of a battery provided by some embodiments of the present application;

FIG. 8 is an enlarged schematic diagram of circle A in FIG. 7 .

Explanation of reference signs:

1. Vehicle; 10. Electrode unit; 11. Electrode assembly; 2. Battery; 20. Shell; 21. Opening; 24. Pressure relief mechanism; 25. Electrode terminal; 3. Controller; X, first direction; Y , second direction; Z, third direction; 4, motor; 5, box body; 51, first part; 52, second part; 53, accommodation space; 54, first wall; 6, battery unit; 7, battery Monomer; 8. Protective component; 801. Protective plate; 802. First connector; 803. Reinforcing part; 804. Connecting part; 805. Insulator.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are the Claim some of the examples, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the technical field of this application; the terms used in this application in the description of the application are only to describe specific implementations The purpose of the example is not intended to limit the present application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and the description of the above drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, rather than to describe a specific sequence or primary-subordinate relationship.

Reference in this application to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

In the description of this application, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection", "connection" and "attachment" should be understood in a broad sense, for example, it may be a fixed connection, It can also be detachably connected or integrally connected; it can be directly connected or indirectly connected through an intermediary, and it can be internal communication between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

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

In the embodiments of the present application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of the various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are for illustrative purposes only, and should not constitute any limitation to the application .

"Plurality" in this application refers to two or more (including two).

In this application, the battery cells may include lithium-ion secondary battery cells, lithium-ion primary battery cells, lithium-sulfur battery cells, sodium-lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc. The embodiment of the present application does not limit this. The battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.

The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, and the like. Batteries generally include a housing for enclosing one or more battery cells. The casing can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

The battery cell includes an electrode unit and an electrolyte, the electrode unit includes at least one electrode assembly, and the electrode assembly includes a positive pole piece, a negative pole piece and a separator. A battery cell works primarily by moving metal ions between the positive and negative pole pieces. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on the surface of the positive electrode current collector; the positive electrode current collector includes a positive electrode current collector and a positive electrode protrusion protruding from the positive electrode current collector, and the positive electrode current collector part is coated with a positive electrode active material layer, at least part of the positive electrode convex part is not coated with a positive electrode active material layer, and the positive electrode convex part is used as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, the positive electrode active material layer includes the positive electrode active material, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on the surface of the negative electrode current collector; the negative electrode current collector includes a negative electrode current collector and a negative electrode protrusion protruding from the negative electrode current collector. part is coated with a negative electrode active material layer, at least part of the negative electrode convex part is not coated with a negative electrode active material layer, and the negative electrode convex part is used as a negative electrode tab. The material of the negative electrode current collector may be copper, the negative electrode active material layer includes the negative electrode active material, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current is passed without fusing, the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together. The material of the spacer can be PP (polypropylene, polypropylene) or PE (polyethylene, polyethylene). In addition, the electrode assembly may be a wound structure or a laminated structure, which is not limited in the embodiment of the present application.

In the following embodiments, for the convenience of description, the electric device is taken as an example for description.

Fig. 1 is a schematic structural diagram of a vehicle provided by some embodiments of the present application. As shown in FIG. 1 , a battery 2 is arranged inside the vehicle 1 , and the battery 2 can be arranged at the bottom, head or tail of the vehicle 1 . The battery 2 can be used for power supply of the vehicle 1 , for example, the battery 2 can be used as an operating power source of the vehicle 1 .

The vehicle 1 may also include a controller 3 and a motor 4 , the controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, for the starting, navigation and working power requirements of the vehicle 1 during driving.

In some embodiments of the present application, the battery 2 can not only be used as an operating power source for the vehicle 1 , but can also be used as a driving power source for the vehicle 1 to provide driving power for the vehicle 1 instead of or partially replacing fuel oil or natural gas.

Fig. 2 is a schematic explosion diagram of a battery provided by some embodiments of the present application. As shown in FIG. 2 , the battery 2 includes a box body 5 and a battery module, a plurality of battery cells form a battery module, and the battery module is housed in the box body 5 .

The box body 5 is used to accommodate the battery cells, and the box body 5 may have various structures. In some embodiments, the box body 5 may include a first part 51 and a second part 52, the first part 51 and the second part 52 cover each other, and the first part 51 and the second part 52 jointly define a cavity for accommodating the battery cells. Accommodating space 53 . The second part 52 can be a hollow structure with an open end, the first part 51 is a plate-like structure, and the first part 51 covers the opening side of the second part 52 to form a box body 5 with an accommodation space 53; the first part 51 and the second part The two parts 52 can also be hollow structures with one side open, and the open side of the first part 51 covers the open side of the second part 52 to form the box body 5 with the receiving space 53 . Of course, the first part 51 and the second part 52 can be in various shapes, such as cylinder, cuboid and so on.

In order to improve the sealing performance after the first part 51 and the second part 52 are connected, a sealing member, such as a sealant, a sealing ring, etc., may also be provided between the first part 51 and the second part 52 .

Assuming that the first part 51 covers the top of the second part 52 , the first part 51 can also be called the upper box cover, and the second part 52 can also be called the lower box body.

In the battery 2, there may be one battery cell 7, or there may be a plurality of them. If there are multiple battery cells 7 , the multiple battery cells 7 can be connected in series, in parallel or in parallel. The hybrid connection means that the multiple battery cells 7 are both in series and in parallel. A plurality of battery cells 7 can be directly connected in series or in parallel or mixed together, and then the whole composed of a plurality of battery cells 7 is contained in the box body 5; of course, a plurality of battery cells 7 can also be connected in series first Or parallel or mixed connection to form a battery module, multiple battery modules are then connected in series or parallel or mixed to form a whole, and accommodated in the box 5 .

Fig. 3 is an exploded schematic diagram of a battery cell in a battery provided by some embodiments of the present application. In some embodiments, there are multiple battery cells 7 , and the multiple battery cells 7 are connected in series, in parallel or in parallel to form a battery module. A plurality of battery modules are connected in series, in parallel or in combination to form a whole and accommodated in the box.

The plurality of battery cells 7 in the battery module can be electrically connected through a confluence component, so as to realize parallel connection, series connection or mixed connection of the plurality of battery cells 7 in the battery module.

The battery cell 7 of the embodiment of the present application includes an electrode unit 10 , a casing 20 and an end cap assembly 30 . The housing 20 has an opening 21 , the electrode unit 10 is accommodated in the housing 20 , and the end cap assembly 30 is used to connect the housing 20 and cover the opening 21 .

The electrode unit 10 includes at least one electrode assembly 11 . Exemplarily, the electrode unit 10 in FIG. 3 includes two electrode assemblies 11 . The electrode assembly 11 includes a positive pole piece, a negative pole piece and a separator. The electrode assembly 11 may be a wound electrode assembly, a laminated electrode assembly or other forms of electrode assemblies.

The electrode unit 10 includes at least one electrode assembly 11 . That is to say, in the battery cell 7 , there may be one electrode assembly 11 housed in the case 20 or a plurality of them.

The battery cell 7 generally includes a housing 70 . The housing 70 includes the housing 20 and the end cap assembly 30 . The casing 20 is a hollow structure with one side open. The end cover assembly 30 covers the opening of the housing 20 and forms a sealed connection to form a receiving cavity for receiving the electrode unit 10 and the electrolyte.

The end cap assembly 30 also includes an electrode terminal 25 . In some embodiments, there are two electrode terminals 25, and the two electrode terminals 25 are respectively defined as a positive electrode terminal and a negative electrode terminal. The positive electrode terminal and the negative electrode terminal are respectively used for electrical connection with the positive ear and the negative ear of the electrode assembly 11 to output the current generated by the electrode assembly 11 .

The end cover assembly 30 also includes a pressure relief mechanism 24 for releasing the internal pressure or temperature of the battery cell 7 when the internal pressure or temperature of the battery cell 7 reaches a predetermined value. Exemplarily, the pressure relief mechanism 24 is located between the positive electrode terminal and the negative electrode terminal, and the pressure relief mechanism 24 may be a component such as an explosion-proof valve, a burst disk, a gas valve, a pressure relief valve, or a safety valve.

In some embodiments, the housing 20 can also be a hollow structure with opposite sides open. The end cap assembly 30 includes two end cap assemblies 30 , and the two end cap assemblies 30 respectively cover the two openings of the casing 20 and are sealed and connected to form an accommodating cavity for accommodating the electrode unit 10 and the electrolyte. In some examples, the positive electrode terminal and the negative electrode terminal may be mounted on the same end cap assembly 30 . In other examples, the positive electrode terminal and the negative electrode terminal are installed on the two end cap assemblies 30 respectively.

In the battery cell 7 , when the temperature and pressure inside the battery cell 7 exceed a threshold, the pressure relief mechanism 24 will activate and discharge the gas or liquid inside the battery cell 7 to prevent the battery cell 7 from exploding. However, during use, the inventors found that when the pressure relief mechanism discharges the substance, a large amount of heat will be released, causing the temperature inside the battery case to rise rapidly. Moreover, the temperature of the discharged material is high, which will cause damage to the battery box or other battery cells around the battery cell.

In view of the above problems, the inventor designed a battery, which prevents damage to the battery box and ensures the normal operation of the battery by setting a protective component to block the high-temperature substances ejected from the pressure relief mechanism, and by setting a reasonable protective component The minimum distance from the pressure relief mechanism and the thickness of the protective component itself can ensure the protective effect while rationally using the internal space of the battery and exerting the protective function of the protective component itself.

Please continue to refer to Figure 4 to Figure 8, Figure 4 is a schematic diagram of the explosion of the battery provided by some other embodiments of the present application; Figure 5 is a schematic diagram of the minimum distance between the protective component and the battery cell provided by some embodiments of the present application; Figure 6 is Schematic diagram of the structure of the protective assembly provided by some embodiments of the present application;

FIG. 7 is a schematic cross-sectional structure diagram of a battery provided by some embodiments of the present application; FIG. 8 is an enlarged schematic diagram of a circle A in FIG. 7 .

Please refer to FIG. 3 to FIG. 5 in combination. The battery 2 in the embodiment of the present application includes: a case body 5 , a battery cell 7 and a protective assembly 8 . The box 5 has a first wall 54 . The battery cell 7 includes a pressure relief mechanism 24 , the battery cell 7 is disposed in the box body 5 , and the pressure relief mechanism 24 is disposed toward the first wall 54 . The protection assembly 8 is disposed on the side of the case body 5 facing the battery cells 7 , and at least part of the protection assembly 8 is disposed between the pressure relief mechanism 24 and the first wall 54 . Among them, the thermal protection index Q of the protective component 8 and the minimum distance H between the pressure relief mechanism 24 and the thickness T of the protective component 8 satisfy the relationship: Q=H+10*T, and the value range of the thermal protection index Q: 13≤ Q≤35.

In the technical solution of the embodiment of the present application, the high-temperature substance ejected from the pressure relief mechanism 24 is blocked by setting the protective component 8, preventing damage to the box body 5 of the battery 2, ensuring the normal operation of the battery 2, and setting a reasonable The minimum distance between the protection component 8 and the pressure relief mechanism 24 and the thickness of the protection component 8 itself can ensure the protection effect while rationally using the internal space of the battery 2 and exerting the protection function of the protection component 8 itself.

In some embodiments of the present application, the value range of the minimum distance H is: 3mm≤H≤10mm. Different minimum distances can be set according to the capacity of different battery cells 7 to expand the application range.

In some embodiments of the present application, the value of the capacity R of the battery cell 7 is: 50Ah<R<100Ah, and the value range of the thickness T of the protective component 8 is: 0.3mm≤T≤1.2mm. When the capacity of the battery cell 7 is small, the thickness of the corresponding protective component 8 can be relatively reduced, so as to reduce the space occupied by the protective component 8 or reduce the weight of the protective component 8 .

Exemplarily, when the capacity of the battery cell 7 is 50Ah, the thickness of the protective component 8 can take any value among 0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.1mm and 1.2mm.

When the capacity of the battery cell 7 is 80Ah, the thickness of the protective component 8 can take any value among 0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.1mm and 1.2mm.

When the capacity of the battery cell 7 is 90Ah, the thickness of the protective component 8 can take any value among 0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.1mm and 1.2mm.

In some embodiments of the present application, the capacity of the battery cell 7 is 100Ah≤R≤200Ah, and the value range of the thickness T of the protective component 8 is: 0.8mm≤T≤2.0mm.

Exemplarily, when the capacity of the battery cell 7 is 100Ah, the thickness of the protective component 8 can take any value among 0.8mm, 0.9mm, 1.0mm, 1.2mm, 1.5mm and 1.8mm.

When the capacity of the battery cell 7 is 150Ah, the thickness of the protective component 8 can take any value among 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.5mm and 1.8mm.

When the capacity of the battery cell 7 is 180Ah, the thickness of the protective component 8 can take any value among 1.0mm, 1.2mm, 1.3mm, 1.5mm, 1.8mm and 1.9mm.

When the capacity of the battery cell 7 is 200Ah, the thickness of the protective component 8 can take any value among 1.0mm, 1.2mm, 1.5mm, 1.8mm, 1.9mm and 2.0mm.

In some embodiments of the present application, the value of the capacity R of the battery cell 7 is: 200Ah<R≤300Ah, and the value range of the thickness T of the protective component 8 is: 1.2mm≤T≤2.5mm. When the capacity of the battery cell 7 is large, the thickness of the protective assembly 8 is set thicker, which can reduce the minimum distance between the pressure relief mechanism 24 and the protective plate 801 and reduce the space occupied by the protective structure.

Exemplarily, when the capacity of the battery cell 7 is 220Ah, the thickness of the protective component 8 can take any value among 1.2mm, 1.3mm, 1.5mm, 1.7mm, 1.8mm and 2.0mm.

When the capacity of the battery cell 7 is 250Ah, the thickness of the protective component 8 can take any value among 1.2mm, 1.4mm, 1.5mm, 1.7mm, 1.8mm and 2.0mm.

When the capacity of the battery cell 7 is 300Ah, the thickness of the protective component 8 can be any value among 1.5mm, 1.7mm, 1.8mm, 2.0mm, 2.1mm and 2.2mm.

The capacity of the battery cell 7, the thickness T of the protective component 8 and the minimum distance H between the protective component 8 and the battery cell 7 can be set according to the table below.

Table 1

Battery capacity (Ah) H(mm) T(mm) 50-100 3-5 0.3-1.5 50-100 5-10 0.3-1.2 50-100 >10 0.15-1 100-200 3-5 1-2.5 100-200 5-10 0.8-2 100-200 >10 0.5-1.8 200-300 3-5 1.5-3 200-300 5-10 1.2-2.5 200-300 >10 0.8-2

In some embodiments of the present application, the battery cell 7 is covered with an insulating member 805 , and the insulating member 805 is disposed between the battery cell 7 and the protective assembly 8 . The above structure can ensure the safety performance of the battery cell 7 .

In some embodiments of the present application, the protective assembly 8 includes a protective plate 801 and a first connecting member 802. The first connecting member 802 is arranged along the circumference of the protective plate 801 to connect the protective plate 801 to the inner wall of the box body 5 or the battery cell. The thickness of the first connecting piece 802 along the height direction of the battery cell 7 is H, and a protective space is formed between the first connecting piece 802 and the protective plate 801 . By setting the first connecting member 802 to form a gap between the protective plate 801 and the battery cell 7 , the structure is simple and the connection is stable.

In some embodiments of the present application, as shown in FIG. 7 and FIG. 8 , the first connecting member 802 includes insulating foam disposed between the insulating member 805 and the protective plate 801 . Insulating foam has good insulation, flame retardant and heat insulation effects, which can further improve the protective effect.

In some embodiments of the present application, there is a gap between the orthographic projection of the first connecting member 802 on the battery cell 7 and the pressure relief mechanism 24 . The first connecting piece 802 and the pressure relief mechanism 24 are arranged in a staggered manner, which can prevent the outlet of the pressure relief mechanism 24 from being blocked and ensure the normal discharge of liquid.

In some embodiments of the present application, the first connecting member 802 includes a connecting screw, and the connecting screw connects the protective plate 801 and the box body 5 . The protective foam may not be provided, and the protective plate 801 is directly connected to the box body 5 with connecting screws. The connecting screws can facilitate the assembly and disassembly of the protective plate 801 .

In some embodiments of the present application, the protective plate 801 includes a mica plate. Mica board is cheap and has good flame retardant effect.

In some embodiments of the present application, the protective plate 801 includes: a reinforcing part 803 and a connecting part 804 . The reinforcement part 803 is disposed corresponding to the pressure relief mechanism 24 . The connecting portion 804 is disposed around the reinforcing portion 803 . Wherein, the thickness of the reinforcement part 803 is greater than the thickness of the connection part 804 . By arranging the reinforcing part 803 , it is possible to carry out key protection on the part of the protection assembly 8 corresponding to the pressure relief mechanism 24 , and improve the protection effect.

In some embodiments of the present application, the orthographic projection of the reinforcing part 803 on the battery cell 7 covers the pressure relief mechanism 24 . The above-mentioned structure can effectively block the liquid ejected from the pressure relief mechanism 24 and improve the protection efficiency.

The embodiment of the present application also provides an electric device, the electric device includes the battery 2 in the above embodiment, and the battery 2 is used to provide electric energy.

The technical solutions described in the embodiments of the present application are applicable to the battery 2 and the electric device using the battery 2 . The electric device may be a vehicle 1, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle 1 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended-range car, etc.; spacecraft include airplanes, rockets, space shuttles and spaceships, etc.; electric toys include Stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as , Electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc. The embodiment of the present application does not impose special limitations on the above electric device.

The electric device in the embodiment of the present application includes the battery 2 in the embodiment of the present application. The battery 2 has a protective component 8 , by setting the protective component 8 , the substance released by the pressure relief mechanism 24 is blocked to prevent damage to the battery cell 7 and improve the safety performance of the battery 2 . Therefore, the electrical device provided in the embodiment of the present application can also achieve the above-mentioned technical effect, and details are not described here.

While the present application has been described with reference to a preferred embodiment, various modifications may be made thereto and equivalents may be substituted for parts thereof without departing from the scope of the present application, in particular, as long as there are no structural conflicts , the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (14)

1. A battery, comprising:

a case having a first wall;

the single battery comprises a pressure relief mechanism, the single battery is arranged in the box body, and the pressure relief mechanism is arranged towards the first wall;

the protection component is arranged on one side of the box body facing the battery monomer, at least part of the protection component is arranged between the pressure relief mechanism and the first wall,

wherein, the thermal protection index Q of the protection component, the minimum distance H between the pressure relief mechanisms and the thickness T of the protection component satisfy the following relations: q = H +10 × t, the thermal protection index Q has a value range: q is more than or equal to 13 and less than or equal to 35.

2. The battery of claim 1, wherein the minimum distance H ranges from: h is more than or equal to 3mm and less than or equal to 10mm.

3. The battery according to claim 2, wherein the capacity R of the battery cell takes on the following values: r is more than 50Ah and less than 100Ah, and the thickness T of the protective component has a value range as follows: t is more than or equal to 0.3mm and less than or equal to 1.2mm.

4. The battery according to claim 2, wherein the capacity R of the battery cell takes on the following values: r is more than or equal to 100Ah and less than or equal to 200Ah, and the value range of the thickness T of the protection component is as follows: t is more than or equal to 0.8mm and less than or equal to 2.0mm.

5. The battery according to claim 2, wherein the capacity R of the battery cell takes on the following values: r is more than 200Ah and less than or equal to 300Ah, and the value range of the thickness T of the protective component is as follows: t is more than or equal to 1.2mm and less than or equal to 2.5mm.

6. The battery of any of claims 1-5, wherein the battery cell is externally coated with an insulator, the insulator being disposed between the battery cell and the protective assembly.

7. The battery according to claim 6, wherein the protection assembly includes a protection plate and a first connector disposed along a circumferential direction of the protection plate to connect the protection plate with an inner wall of the box body or the battery cell, the first connector has a thickness H in a height direction of the battery cell, and a protection space is formed between the first connector and the protection plate.

8. The battery of claim 7, wherein the first connector comprises insulation foam disposed between the insulation member and the protective plate.

9. The battery of claim 8, wherein a gap is provided between an orthographic projection of the first connector on the cell and the pressure relief mechanism.

10. The battery of claim 7, wherein the first connector includes a connection screw that connects the shield plate and the case.

11. The battery of claim 7, wherein the protective plate comprises a mica plate.

12. The battery of any of claims 7-11, wherein the guard plate comprises:

the reinforcing part is arranged corresponding to the pressure relief mechanism;

a connection portion disposed around the reinforcement portion,

wherein the thickness of the reinforcing part is greater than that of the connecting part.

13. The battery of claim 12, wherein an orthographic projection of the reinforcement on the cell covers the pressure relief mechanism.

14. An electrical device comprising a battery as claimed in any one of claims 1 to 13 for providing electrical energy.

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