Battery and electric device

Abstract

The embodiment of the invention provides a battery and a power utilization device. The battery comprises a box body and a battery monomer, the box body is provided with a top and a bottom which are opposite in the height direction of the box body, an opening is formed in the bottom, and the box body comprises a cover body arranged at the opening. The battery monomers are inversely arranged in the box body in a manner that the end cover faces the bottom, the end cover is provided with a pressure relief mechanism and an electrode terminal, and the pressure relief mechanism and the electrode terminal are arranged towards the bottom. In the height direction, a first distance H1 exists between the end cover and the cover body of the single battery, and the ratio H1 / M of the first distance H1 to the weight M of the single battery meets the condition that 0.2 mm / Kg < H1 / M < 50 mm / Kg. According to the embodiment of the invention, the energy density and safety of the battery can be improved.

Description

[0001] This application is a divisional application based on the invention with application number: 202280006445.3, application date June 27, 2022, the applicant is Contemporary Amperex Technology Co., Ltd., and the invention name is "Battery and Electrical Device". Technical Field

[0002] The present application belongs to the field of battery technology, and in particular relates to a battery and an electrical device. Background Art

[0003] In recent years, the emergence of new energy vehicles has played a huge role in promoting social development and environmental protection. Power batteries, as a rechargeable battery, are the power source of new energy vehicles and are widely used in the field of new energy vehicles.

[0004] In some cases, the energy density of the battery is not high, resulting in space waste, which in turn affects the performance of the electrical device; in addition, the existing batteries have poor rigidity and cannot directly withstand the load brought by other parts of the electrical device, which can easily cause safety accidents and affect the safety of the electrical device. Summary of the invention

[0005] The embodiments of the present application provide a battery and an electrical device, which can improve the energy density and safety of the battery.

[0006] In a first aspect, an embodiment of the present application provides a battery, comprising a case and a battery cell. The case has a top and a bottom relative to each other along the height direction of the case, and an opening is provided at the bottom; the case includes a cover provided at the opening. The battery cell is inverted in the case with the end cover facing the bottom of the case, and the end cover is provided with a pressure relief mechanism and an electrode terminal, and both the pressure relief mechanism and the electrode terminal are arranged toward the bottom. In the height direction, there is a first distance H1 between the end cover and the cover of the battery cell, and the ratio H1 / M of the first distance H1 to the weight M of a single battery cell satisfies 0.2mm / Kg

[0007] In the above technical solution, the opening is set at the bottom of the box, the battery cell is set in the box, and the end cover is facing the bottom to be inverted in the box, which can enhance the rigidity of the top of the battery; the electrode terminal and the pressure relief mechanism are set together toward the bottom, which can improve the safety of the battery. Moreover, within this value range, the battery has a good energy density and a suitable structural strength.

[0008] In some embodiments, the box body includes a support plate and a side plate, the support plate is arranged on the top, and the battery is fixedly connected to the support plate.

[0009] ​In the above technical solution, the support plate and the side plate allow the interior of the box to have space for accommodating the battery cells, and by fixing the battery cells at the top, the rigidity of the top of the battery is increased.

[0010] In some embodiments, the box body further includes a cover body disposed on the opening, the side panels are connected to each other to form a frame structure, and the cover body is fixedly connected to the side panels so that the cover body covers the opening.

[0011] In some embodiments, in the height direction, there is a first distance H1 between the end cover and the cover body of the battery cell, and the first distance H1 satisfies 2mm

[0012] In the above technical solution, maintaining the first distance H1 enables the battery to have a suitable volume and good discharge performance.

[0013] In some embodiments, the battery further includes a protection component, which is disposed between the battery cell and the cover body to protect the pressure relief mechanism and the electrode terminals.

[0014] In some embodiments, the protection assembly includes a plurality of protection members spaced apart along the length direction of the box body, a plurality of battery cells are provided, and the pressure relief mechanism and the electrode terminal of each battery cell are located between two adjacent protection members.

[0015] In the above technical solution, the protective component protects the pressure relief mechanism and the electrode terminals.

[0016] In some embodiments, the plurality of protective members include edge protective members, first protective members and second protective members. Along the length direction, the edge protective members are arranged on both side edges of the plurality of battery cells arranged in an array, and the first protective members and the second protective members are alternately distributed between the two edge protective members.

[0017] In the above technical solution, the protective member is more adapted to the array distribution of the battery cells, thereby providing better support for the battery cells.

[0018] In some embodiments, along the width direction of the box body, an extension length of the first protection member is greater than an extension length of the second protection member.

[0019] In the above technical solution, the second protective member is made to avoid the confluence component.

[0020] In some embodiments, along the length direction, the widths of the first guard and the second guard are greater than the width of the edge guard.

[0021] The above technical solution helps to evenly distribute the force inside the battery and increase the overall structural strength of the battery.

[0022] ​In some embodiments, the end cap includes a functional area and a shoulder. Along the length direction, the shoulder is located on both sides of the functional area. The functional area is provided with a pressure relief mechanism and an electrode terminal. The protective piece is fixedly connected to the shoulder.

[0023] In the above technical solution, the battery cell is fixed to the protective part through the shoulder, which can make the battery have a more compact structure, avoid damage to the functional area due to force, and increase the life of the battery cell.

[0024] In some embodiments, along the length direction, the width D1 of the edge protection member, the width D2 of the first protection member, the width D3 of the second protection member, and the width D4 of the shoulder satisfy: 0.2D4≤D1≤D4, 0.5D4≤D2≤2D4, 0.5D4≤D3≤2D4 to meet the support requirements of the battery cell.

[0025] In some embodiments, in the height direction, an extension height of the protective member is greater than an extension height of the electrode terminal.

[0026] In the above technical solution, the electrode terminals and the pressure relief mechanism are suspended between adjacent protective members 41 to avoid contact with other components and influence on the functions.

[0027] In some embodiments, the battery further includes an insulating plate body, and the insulating plate body is disposed between the protective assembly and the cover body.

[0028] In some embodiments, the insulating plate body is fixedly connected to the cover body to increase the structural firmness of the battery.

[0029] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery cell according to any embodiment of the first aspect, wherein the battery cell is used to provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0032] Figure 2 A schematic diagram of the assembly structure of batteries according to some embodiments of the present application;

[0033] Figure 3 An exploded schematic diagram of a battery according to some embodiments of the present application;

[0034] Figure 4A schematic diagram of the structure of a battery cover according to some embodiments of the present application;

[0035] Figure 5 for Figure 2 A schematic cross-sectional view of a battery shown;

[0036] Figure 6 A schematic structural diagram of a collision test device for performing a collision test on a battery according to some embodiments of the present application.

[0037] Figure 7 Schematic diagrams of explosions of batteries according to other embodiments of the present application;

[0038] Figure 8 A schematic diagram of the structure of a battery protection assembly according to some other embodiments of the present application;

[0039] Fig. 9 A schematic diagram of the structure of a battery cell of a battery in some embodiments of the present application;

[0040] Fig.10 for Figure 7 A schematic cross-sectional view of a battery shown;

[0041] Fig.11 for Fig.10 An enlarged schematic diagram at the circle B;

[0042] Fig.12 Schematic diagram of the internal structure of a battery cell according to some embodiments of the present application.

[0043] The reference numerals of the specific embodiments are as follows:

[0044] 1000, vehicle; 100, battery; 200, controller; 300, motor; 1, housing; 101, top; 102, bottom; 103, opening; 11, support plate; 12, side plate; 2, battery cell; 201, functional area; 202, shoulder; 21, end cover; 211, electrode terminal; 212, pressure relief mechanism; 22, housing; 23, electrode assembly; 24, converging component; 3, cover; 31, main body; 32, matching part; 4, protective assembly; 41, protective member; 411, edge protective member; 412, first protective member; 413, second protective member; 42, insulating plate;

[0045] X, length direction; Y, width direction; Z, height direction. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution 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 part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0047] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0048] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0049] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0051] In the embodiments of the present application, the same reference numerals represent 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 various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0052] The term "plurality" used in the present application refers to two or more (including two).

[0053] In the present application, the term "parallel" includes not only the absolutely parallel situation, but also the roughly parallel situation conventionally recognized in engineering; meanwhile, "vertical" includes not only the absolutely vertical situation, but also the roughly vertical situation conventionally recognized in engineering.

[0054] In the present 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., and the embodiments of the present application are not limited to this.

[0055] In the present application, a battery refers to a single physical module that includes one or more battery cells to provide a higher voltage and capacity. For example, the battery mentioned in the present application may be a battery module or a battery pack, etc. A battery generally includes a casing for encapsulating one or more battery cells. The casing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells. In a battery, multiple battery cells can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells are both connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in mixed connection, and then the whole formed by the multiple battery cells is accommodated in the casing; of course, the battery can also be a battery in which multiple battery cells are first connected in series, in parallel, or in mixed connection to form a battery, and then multiple batteries are connected in series, in parallel, or in mixed connection to form a whole, and accommodated in the casing.

[0056] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0057] In the related art, the opening of the battery box is usually oriented upward in the vertical direction, the battery cell is fixed to the bottom of the battery, and the electrode terminals face the cover covering the box opening.

[0058] However, in the battery arranged as above, the applicant noticed that, because when the battery is arranged in an electrical device, the bottom is bonded to the electrical device and the battery cell is fixed to the bottom of the battery, the rigidity of the top of the battery, which is more vulnerable to collision, is poor. In addition, during a collision, the internal battery cells are subjected to uneven force, which makes the battery easy to be damaged, resulting in poor battery safety and affecting the battery's performance.

[0059] In view of this, an embodiment of the present application provides a battery, in which an opening is arranged at the bottom of a box body, a battery cell is arranged in the box body, and an end cover is facing the bottom so as to be inverted in the box body, which can enhance the overall rigidity of the battery and reduce the probability of damage thereof in a collision; the electrode terminals and the pressure relief mechanism are arranged together toward the bottom, which can improve the safety of the battery; and, by adjusting the ratio of the distance from the motor terminal of the battery to the cover body to the weight of the battery cell, the overall structural strength of the battery can be adjusted while ensuring the energy density of the battery, thereby further improving the performance of the battery.

[0060] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical devices powered by batteries.

[0061] The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool may include a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0062] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the electrical devices described above, but for the sake of simplicity, the following embodiments are described using vehicle 1000 as an example.

[0063] Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of the present application. Figure 1 As shown, the vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended range vehicle, etc. A battery 100 is disposed inside the vehicle 1000, and the battery 1000 may be disposed at the bottom, head or tail of the vehicle 1000.

[0064] The battery 100 can be used to power the vehicle 1000, for example, the battery 100 can be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery 100 to power the motor 300, for example, to meet the power requirements for starting, navigating, and driving the vehicle 1000. In some embodiments of the present application, the battery 100 can not only be used as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0065] Figure 2 Schematic diagram of the assembly structure of the battery 100 according to some embodiments of the present application. Figure 3 FIG. 1 is an exploded schematic diagram of a battery 100 according to some embodiments of the present application. Figure 2 as well as Figure 3 As shown, in some embodiments of the present application, the battery 100 includes a box body 1 and a battery cell 2. The box body 1 has a top 101 and a bottom 102 relative to each other along the height direction Z of the box body 1, and the bottom 102 is provided with an opening 103. The battery cell 2 is inverted in the box body 1 with the end cover 21 facing the bottom 102, and the end cover 21 is provided with a pressure relief mechanism 212 and an electrode terminal 211, and both the pressure relief mechanism 212 and the electrode terminal 211 are arranged toward the bottom 102.

[0066] The box body 1 has a relative top 101 and bottom 102 along the height direction of the box body 1, which indicates that the top 101 and the bottom 102 of the box body 1 are arranged in sequence from top to bottom along the height direction. The opening 103 is provided at the bottom 102, that is, the box body 1 faces downward in the height direction. For ease of description, in the embodiment of the present application, the height direction is the Z direction, that is, the vertical direction. It should be understood that the height direction Z of the box body 1 can also be along other directions. In the following content, in order to indicate other factors such as the arrangement direction of the battery cells 2, other directions will also be defined in detail, which will not be described in detail here.

[0067] The battery cell 2 is placed upside down in the box body 1 with the end cap 21 facing the bottom 102, indicating that the battery cell 2 is placed upside down with the box body 1 in the height direction Z. The end cap 21 is provided with a pressure relief mechanism 212 and an electrode terminal 211. Since the end cap 21 faces the bottom 102, the pressure relief mechanism 212 and the electrode terminal 211 also face the bottom 102 of the box body 1.

[0068] The pressure relief mechanism 212 refers to an element or component that is actuated to release the internal pressure when the internal pressure of the battery cell 2 reaches a predetermined threshold. That is, when the internal pressure of the battery cell 2 reaches a predetermined threshold, the pressure relief mechanism 212 is activated or activated to a certain state, so that the internal pressure of the battery cell 2 can be released. The action produced by the pressure relief mechanism 212 may include but is not limited to: at least a part of the pressure relief mechanism 212 is broken, shattered, torn or opened, thereby forming an opening 103 or a channel for internal pressure release. At this time, the high-temperature and high-pressure substances inside the battery cell 2 will be discharged from the actuated part as emissions. In this way, the battery cell 2 can be depressurized under controllable pressure, thereby avoiding potential more serious accidents. The pressure relief mechanism 212 can take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive element or structure.

[0069] By inverting the battery cell 2 and the box body 1, the battery cell 2 can be arranged at the top 101 of the battery 100, thereby increasing the rigidity of the top 101 of the battery 100 and increasing the safety of the battery 100. In addition, the end cap 21 of the battery cell 2 faces the bottom 102 of the battery 100, which can increase the energy density of the battery 100 and improve the usability of the battery 100. The electrode terminal 211 is arranged toward the bottom 102, which can provide a larger electrical connection space for the electrode terminal 211. The pressure relief mechanism 212 is arranged toward the bottom 102, so that the pressure relief direction of the pressure relief mechanism 212 is toward the bottom 102 of the battery 100, thereby preventing the pressure relief mechanism 212 from discharging to other external devices connected to the top 101 of the battery 100, which can increase the safety of the battery 100.

[0070] In some embodiments of the present application, the box body 1 includes a support plate 11 and a side plate 12 . The support plate 11 is disposed on the top 101 , and the battery 100 is fixedly connected to the support plate 11 .

[0071] The support plate 11 is arranged at the top 101 and is arranged in sequence with the side plate 12 from top to bottom along the height direction Z. The support plate 11 is a plate extending in the horizontal direction and is used to increase the rigidity of the top 101 of the battery 100. The side plate 12 is a plate extending in the height direction Z. The side plate 12 surrounds the support plate 11 and forms an opening 103 at the bottom 102, so that the box body 1 has space for accommodating the battery cell 2. The battery cell 2 is fixedly connected to the support plate 11, which can increase the rigidity of the top 101 of the battery 100 and reduce the possibility of damage to the battery 100 in a collision.

[0072] Optionally, the battery cell 2 may be directly connected to the support plate 11 by gluing, or may be fixedly connected by other means.

[0073] Optionally, the side panel 12 may be integrally formed with the support panel 11, or may be fixedly connected to the support panel 11 by welding, bonding, fasteners, or hot-melt self-tapping technology, etc., and this application does not impose any restrictions on this.

[0074] In an optional embodiment, a cooling channel (not shown in the figure) is buried inside the support plate 11. Since the battery cell 2 is arranged on the support plate 11, the bottom 102 of the battery cell 2 is in contact with the support plate 11. Considering the performance of the battery 100, a channel is buried inside the support plate 11, through which gas or liquid as a heat medium flows, which can regulate the temperature of the battery 100 when the battery 100 is working, thereby increasing the life and usability of the battery 100.

[0075] In another optional embodiment, the channel can also be arranged between the battery cell 2 and the support plate 11 as a thermal management component, or formed into any other component that can be arranged to regulate the temperature of the battery 100, and the embodiment of the present application is not limited here.

[0076] Figure 4 Schematic diagram of the structure of the cover 3 of the battery 100 in some embodiments of the present application. Figure 4 As shown, in some embodiments of the present application, the box body 1 further includes a cover body 3 disposed at the opening 103 , the side panels 12 are interconnected to form a frame structure, and the cover body 3 is fixedly connected to the side panels 12 .

[0077] The side plates 12 are connected to each other to form a frame structure, that is, the side plates 12 are arranged around the support plate 11 and combined with the support plate 11 to form a box body 1 to accommodate the battery cells 2. The cover body 3 is fixedly connected to the side plates 12 to cover the opening 103, so that the box body 1 has a relatively sealed structure.

[0078] The cover body 3 includes a main body 31 and a matching portion 32, wherein the matching portion 32 is arranged around the main body 31 and matches the side plate 12. In other words, the main body 31 covers the opening 103 formed by the side plate 12, and the matching portion 32 is fixed to the side plate 12, so that the cover body 3 is fixedly connected to the side plate 12. Optionally, the matching portion 32 and the side plate 12 can be bolted, or the matching portion 32 and the side plate 12 can be fixedly connected in other ways.

[0079] In the height direction Z, the main body 31 protrudes from the extension surface of the bottom 102 relative to the mating portion 32. This allows a relatively larger distance between the battery cell 2 disposed inside the box 1 and the cover 3. It should be understood that the protruding distance of the main body 31 relative to the mating portion 32 should be selected based on the energy density of the battery 100, and should not be too large to increase the volume of the battery 100 and reduce the energy density of the battery 100.

[0080] Figure 5 for Figure 2 The schematic cross-sectional view of the battery 100 is shown. Figure 5 As shown, in some embodiments of the present application, there is a first distance H1 between the end cover 21 of the battery cell 2 and the cover body 3, and the first distance H1 satisfies 2mm

[0081] When the main body 31 of the cover 3 protrudes from the extension surface of the bottom 102 relative to the matching portion 32, the first distance H1 indicates the distance between the main body 31 and one side of the battery cell 2 having the electrode end and the explosion-proof valve in the height direction Z. The first distance H1 satisfies 2mm

[0082] In some embodiments of the present application, the ratio of the first distance H1 to the weight M of a single battery cell 2 satisfies 0.2 mm / Kg

[0083] The ratio H1 / M of the first distance H1 to the weight M of a single battery cell 2 can indicate the energy density and structural strength of the battery 100. When the ratio of the first distance H1 to the weight M of a single battery cell 2 is too large, the energy density of the battery 100 will be too low. When the ratio of the first distance H1 to the weight M of a single battery cell 2 is too small, the structural strength of the battery 100 will be insufficient, resulting in a safety accident in a collision. Therefore, H1 / M satisfies 0.2mm / Kg

[0084] Figure 6 Schematic diagram of the structure of a collision test device A for performing a collision test on a battery 100 in some embodiments of the present application. In order to verify that the battery 100 has good performance when the ratio H1 / M of the first distance H1 to the weight M of a single battery cell 2 is within an appropriate range, the battery 100 is subjected to a collision test using the collision test device A, for example. Figure 6 As shown, the collision test device A includes an impact head A1, a launch device A2 and a rack A3. During the test, the battery 100 is placed on the rack A3, so that the impact head A1 is driven by the launch device A2 to collide with the battery 100 at a certain speed. Among them, the test conditions can be selected as: the collision direction is the height direction Z, the collision position is the weak point of the battery 100, and the collision energy is 90J.

[0085] ​​​​Since the battery 100 is applied to an electrical device such as a vehicle 1000, and is installed on the vehicle 1000 through the top 101, the bottom 102 of the battery 100 is impacted in the height direction Z, which can simulate the scene after the battery 100 is installed on the vehicle 1000. The weak point of the battery 100 indicates the position where the battery 100 is easily damaged. This point is often within the radius of 240mm of the geometric center of the battery 100. The weak point of the battery 100 is impacted, which can simulate the state of the battery 100 after the position with weak structural strength of the battery 100 is impacted. The impact energy is 90J, which can be equivalent to the impact head A1 colliding with the battery 100 at a speed of 4.2m / s. It can be understood that other impact energies can also be used to impact the battery 100, for example, 120J (collision speed 4.9m / s) or 150J (collision speed 5.5m / s). In an actual experiment, the battery 100 may be impacted multiple times with one impact energy, or may be impacted multiple times with multiple impact energies.

[0086] After the battery 100 is impacted by the collision test device A, it is observed for 2 hours at ambient temperature to detect whether the battery 100 has a fire or explosion. Optionally, after the battery 100 is impacted by the collision test device A, the battery 100 may also be subjected to a shell protection level test, etc., which is not limited in the embodiment of the present application.

[0087] Table 1 shows the test results of the collision test performed on the battery 100 by the above method when the first distance H1, the weight M of a single battery cell 2, and the value of H1 / M are different.

[0088] Table 1

[0089]

[0090]

[0091] As shown in Table 1, when 2mm

[0092] Figure 7 Schematic diagram of the explosion of the battery 100 according to some other embodiments of the present application. Figure 8 Schematic diagram of the structure of the protection component 4 of the battery 100 of some other embodiments of the present application. Figure 7 as well as Figure 8 As shown, in some embodiments of the present application, the battery 100 further includes a protection component 4 , which is disposed between the battery cell 2 and the cover 3 to protect the pressure relief mechanism 212 and the electrode terminal 211 .​

[0093] The protective component 4 is arranged between the battery cell 2 and the cover body 3, that is, between the pressure relief mechanism 212 and the electrode terminal 211 and the cover body 3, and is configured to support the battery cell 2 and the cover body 3, thereby providing protection for the pressure relief mechanism 212 and the electrode terminal 211, and protecting them during a collision.

[0094] In some embodiments of the present application, the protective assembly 4 includes a plurality of protective members 41 spaced apart along the length direction of the box body 1 , and a plurality of battery cells 2 are provided, and the pressure relief mechanism 212 and the electrode terminal 211 of each battery cell 2 are located between two adjacent protective members 41 .

[0095] For ease of description, in some embodiments of the present application, the length direction of the box 1 is taken as the X direction, that is, one of the horizontal directions. The length direction X and the height direction Z are perpendicular to each other. When the angle between the length direction X and the height direction Z is 85, the length direction X and the height direction Z can be regarded as perpendicular to each other. It should be understood that the length direction X can also be other directions, and the length direction X may not be perpendicular to the height direction Z, which will not be described in detail in this application.

[0096] In the battery 100, there may be multiple battery cells 2, and the multiple battery cells 2 may be connected in series, in parallel, or in a mixed connection. A mixed connection means that the multiple battery cells 2 are both connected in series and in parallel. The multiple battery cells 2 may be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the multiple battery cells 2 is accommodated in the box 1. Of course, the battery 100 may also be a battery 100 module in which multiple battery cells 2 are first connected in series, in parallel, or in a mixed connection, and the multiple battery 100 modules are then connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 1. Therefore, the battery cells 2 may be distributed in an array in the battery 100.

[0097] The plurality of protective members 41 are distributed at intervals along the length direction X, that is, the protective components 4 are arranged between the plurality of battery cells 2 and the cover body 3 along the length direction X. As an example, the protective member 41 can be formed into a strip shape, protruding from the cover body 3 along the height direction Z and fixed to the battery cell 2, so that the pressure relief mechanism 212 and the electrode terminal 211 of the battery 100 are located between two adjacent protective members 41, thereby protecting the pressure relief mechanism 212 and the electrode terminal 211.

[0098] In some embodiments of the present application, multiple protective members 41 include an edge protective member 411, a first protective member 412 and a second protective member 413. Along the length direction X, the edge protective member 411 is arranged on both side edges of multiple battery cells 2 arranged in an array, and the first protective member 412 and the second protective member 413 are alternately distributed between the two edge protective members 411.

[0099] The edge protection member 411 is disposed on both side edges of the plurality of battery cells 2 arranged in an array, that is, disposed on the edge of the battery cell 2 located at the outermost side of the array, so as to support the battery cells 2 when the battery cells 2 are close to the box body 1. The first protection member 412 and the second protection member 413 are alternately distributed between the two edge protection members 411, so that the protection member 41 can better adapt to the array distribution of the battery cells 2, thereby providing better support for the battery cells 2.

[0100] In some embodiments of the present application, along the width direction of the box body 1 , the extension length of the first protective member 412 is greater than the extension length of the second protective member 413 .

[0101] For ease of description, in the embodiment of the present application, the width direction of the box 1 is taken as the Y direction, which is another horizontal direction. The length direction X, the height direction Z, and the width direction Y are perpendicular to each other. When the angle between the length direction X, the height direction Z, and the width direction Y is 85, the three can be regarded as perpendicular to each other. It should be understood that the width direction Y can also be other directions, and the width direction Y may not be perpendicular to the length direction X and the height direction Z, which will not be described in detail in the embodiment of the present application.

[0102] Reference again Figure 3 In some optional embodiments, multiple battery cells 2 are electrically connected through a busbar component 24. The busbar component 24 is connected across the electrode terminals 211 of adjacent battery cells 2 to connect multiple battery cells 2 in series, in parallel, or in mixed connection. Since in some embodiments of the present application, the busbar component 24 is connected across the electrode terminals 211 of adjacent battery cells 2 in the length direction X, at least a portion of the protective member 41 needs to avoid it. Therefore, in the width direction Y, the extension length of the first protective member 412 is greater than the extension length of the second protective member 413, so that the second protective member 413 avoids the busbar component 24.

[0103] By making the lengths of the first protective member 412 and the second protective member 413 different in the width direction Y, the protective member can avoid the confluence component 24, so that the protective assembly 4 is better adapted to the structure of the battery 100, and the battery cells 2 are convenient to be connected in series, parallel and mixed.

[0104] Optionally, when the busbar component 24 is connected between the electrode terminals 211 in other directions, the sizes of the first protection member 412 and the second protection member 413 may be changed according to specific circumstances.

[0105] Optionally, the extended length of the protective member 41 may indicate only the sum of the lengths of the protective member 41 in the width direction Y, so that the sum of the lengths of the second protective member 413 is smaller than that of the first protective member 412, that is, the second protective member 413 can avoid the convergence component 24 at any position, such as at one end of the second protective member 413 or in the middle of the second protective member 413, depending on the arrangement of the convergence component 24. The embodiment of the present application does not impose any special restrictions on the above-mentioned electrical devices.

[0106] In some embodiments of the present application, along the length direction X, the widths of the first protection member 412 and the second protection member 413 are greater than the width of the edge protection member 411 .

[0107] Since the edge protection member 411 is arranged at the edge of the battery cell 2 array, the edge protection member 411 does not need to support adjacent battery cells 2 at the same time in the length direction X like the first protection member 412 or the second protection member 413, but only needs to support one column of battery cells 2. The width of the edge protection member 411 can be smaller than the first protection member 412 and the second protection member 413, which can provide a good supporting effect.

[0108] Optionally, the width of the first protection member 412 in the length direction X may be smaller than the width of the second protection member 413. At this time, the widths of the second protection member 413, the first protection member 412 and the edge protection member 411 in the length direction X decrease gradually.

[0109] Fig. 9 Schematic diagram of the structure of a battery cell 2 of a battery 100 in some embodiments of the present application. Fig. 9 As shown, in some embodiments of the present application, the end cover 21 includes a functional area 201 and a shoulder 202. Along the length direction X, the shoulder 202 is located on both sides of the functional area 201. The functional area 201 is provided with a pressure relief mechanism 212 and an electrode terminal 211, and the protective member 41 is fixedly connected to the shoulder 202.

[0110] The functional area 201 indicates the area on the end cap 21 where the battery cell 2 can realize its own functions, or the area where the battery cell 2 can interact with the outside world. Since the functional area 201 is often provided with electrical connection components or components that perform other functions, the functional area 201 should not be subjected to force during the use of the battery 100. The shoulder 202 indicates the area of ​​the end cap 21 that can be subjected to force except the functional area 201. Optionally, in the functional area 201, the electrode terminals 211 can be arranged on both sides of the pressure relief mechanism 212 to reduce the impact of the pressure relief mechanism 212 on the electrode terminals 211 when releasing pressure.

[0111] The functional area 201 is arranged between the shoulders 202, so that the shoulders 202 can provide a certain protective effect on the functional area 201. The battery cell 2 is fixed to the protective member 41 through the shoulders 202, so that the battery 100 has a more compact structure, avoids damage to the functional area 201 due to force, and improves the life of the battery cell 2.

[0112] In some embodiments of the present application, along the length direction X, the width D1 of the edge protection member 411, the width D2 of the first protection member 412, the width D3 of the second protection member 413, and the width D4 of the shoulder 202 satisfy: 0.2D4≤D1≤D4, 0.5D4≤D2≤2D4, 0.5D4≤D3≤2D4.

[0113] Since the edge protection member 411 is arranged at the edge of the battery array 100, the edge protection member 411 only contacts the shoulder 202 on one side of the edge battery cell 2 in the length direction X, so that the width D1 of the edge protection member 411 is less than or equal to the width D4 of the shoulder 202, which can prevent the edge protection member 411 from contacting the functional area 201 and affecting the function of the battery cell 2, and make the width D1 of the edge protection member 411 greater than or equal to 0.2 times the width D4 of the shoulder 202, so that the edge protection member 411 can provide sufficient support force for the battery cell 2.

[0114] Since the first protective member 412 is disposed between adjacent battery cells 2, the width D2 of the first protective member 412 is greater than or equal to 0.5 times the extension width D4 of the shoulder 202, which can provide sufficient support force for the battery cell 2. Preferably, when the width D2 of the first protective member 412 is greater than or equal to the extension width D4 of the shoulder 202, the first protective member 412 can simultaneously carry two adjacent battery cells 2, without the problem of only being able to carry one side due to offset, resulting in poor structural stability of the battery 100 due to uneven force. In addition, when the width D2 of the first protective member 412 is less than or equal to 2 times the width D4 of the shoulder 202, the first protective member 412 can only contact the shoulders 202 of the two adjacent battery cells 2 when carrying two adjacent battery cells 2 at the same time, and avoid contacting the functional area 201 to affect the function of the battery cell 2.

[0115] Similar to the first protection member 412 , the width D3 of the second protection member 413 may be greater than or equal to 0.5 times the extension width D4 of the shoulder 202 , and less than or equal to 2 times the width D4 of the shoulder 202 .

[0116] In some embodiments of the present application, in the height direction Z, the extension height of the protective member is greater than the extension height of the electrode terminal 211 .

[0117] In the height direction Z of the box body 1 , the extension height of the protective member 41 is greater than the extension height of the electrode terminal 211 , so that the electrode terminal 211 can be suspended between adjacent protective members 41 to avoid contact with other components and affect the function.

[0118] In some embodiments of the present application, the battery 100 further includes an insulating plate 42 , which is disposed between the protective assembly 4 and the cover 3 to absorb and disperse external impact forces in a horizontal direction.

[0119] By providing the insulating plate body 42 , the multiple protective members 41 in the protective assembly 4 can be combined into a whole. In addition, by providing the insulating plate body 42 extending along the length direction X, the force of the protective assembly 4 can also be dispersed to increase the structural strength of the battery 100 .

[0120] Optionally, in order to avoid affecting the electrical connection between the battery cells 2, the insulating plate body 42 and the protective component 4 can both be insulating parts. It can be understood that the insulating part indicates that the insulating plate body 42 and the protective component 4 can be insulating materials, or can be objects whose surfaces are covered with insulating materials to present insulation as a whole. When the insulating plate body 42 and the protective component 4 are objects whose surfaces are covered with insulating materials, the core material can be a metal material, an insulating material or a composite material, and the outer surface of the core material is covered with insulating materials.

[0121] Optionally, the protection component 4 and the insulating plate body 42 can be integrally formed to facilitate the manufacture of the protection component 4. The protection component 4 and the insulating plate body 42 can also be detachably connected to each other to facilitate adjusting the position of the protection component 4 according to the arrangement of the battery cells 2, so that the protection component 4 has a wider range of usage scenarios.

[0122] In some embodiments of the present application, the insulating plate body 42 is fixedly connected to the cover body 3 .

[0123] The insulating plate body 42 may be fixedly connected to the cover body 3 to increase the structural firmness of the battery 100. Optionally, the insulating plate body 42 may also abut against the cover body 3, which is not limited in the embodiment of the present application.

[0124] Fig.10 for Figure 7 A schematic cross-sectional view of a battery 100 is shown. Fig.11 for Fig.10 An enlarged schematic diagram at circle B. Fig.10 as well as Fig.11 As shown, in an optional embodiment, in the height direction Z of the box body 1, the extension height of the protection component 4 is a second distance H2, and the second distance H2 satisfies 0.5mm≤H2≤30mm.

[0125] The protection component 4 has a certain size in the height direction Z, which enables it to protrude from the insulating plate 42 to support the battery cell 2. The protection component 4 maintains a second distance H2, which enables the end cover 21 of the battery cell 2 to maintain a certain distance from the cover 3, thereby maintaining a moderate energy density of the battery 100.

[0126] The ratio H2 / M of the second distance H2 to the weight M of a single battery cell 2 can indicate the energy density and structural strength of the battery 100. When the ratio H2 / M of the second distance H2 to the weight M of a single battery cell 2 is too large, the energy density of the battery 100 will be too low. When the ratio H2 / M of the second distance H2 to the weight M of a single battery cell 2 is too small, the structural strength of the battery 100 will be insufficient, resulting in a safety accident in a collision. Therefore, the ratio H2 / M of the second distance H2 to the weight M of a single battery cell 2 satisfies 0.05mm / Kg≤H2 / M≤50mm / Kg. Within this value range, the battery 100 has a good energy density and a suitable structural strength.

[0127] In order to verify that the battery 100 having a ratio H2 / M of the second distance H2 to the weight M of a single battery cell 2 within an appropriate range has good performance, a structural strength test may be performed on the battery 100. In the process of performing the structural strength test on the battery 100, the structural strength of the battery 100 may be judged by multiple tests such as a shear strength test and a compressive strength test, for example.

[0128] In the shear strength test, for example, the battery 100 can be fixed between the clamps of the shear tester, and then the detection head of the shear tester is used to drive the battery 100 to move along the length direction X or the width direction Y at a speed of 5 mm / min, and the tension F applied by the detection head is recorded when the box body 1 is damaged. The projection area of ​​the battery 100 in the height direction Z is taken as area A, and the value of F / A is the shear strength that the battery 100 can withstand.

[0129] In the compressive strength test, for example, an extrusion head can be used to apply pressure to the battery 100 in the height direction Z and the length direction X or the width direction Y, and the battery 100 is pushed toward the battery 100 at a speed of 2 m / s. The pressure is stopped when the extrusion force reaches 50 KN or the deformation of the battery 100 reaches 30%, and the pressure is maintained for 10 minutes. After the compressive strength test, the battery 100 is left to stand and observe at ambient temperature for 2 hours.

[0130] Optionally, the structural strength of the battery 100 may also be tested by other structural strength tests, which are not limited in the embodiments of the present application.

[0131] Table 2 shows the test results of the structural strength of the battery 100 performed by the above method when the second distance H2, the weight M of a single battery cell 2, and the value of H2 / M are different.

[0132] Table 2

[0133]

[0134]

[0135] As shown in Table 2, when H2 satisfies 0.5 mm ≤ H2 ≤ 30 mm and H2 / M satisfies 0.05 mm / Kg ≤ H2 / M ≤ 50 mm / Kg, the battery 100 has good structural strength in the strength structure test.

[0136] It should be understood that the above description of some embodiments of the battery 100 is merely exemplary, and the battery 100 may also have other structures.

[0137] In some optional embodiments, the box body 1 may also be a simple three-dimensional structure such as a cuboid or a cylinder, or a complex three-dimensional structure composed of simple three-dimensional structures such as a cuboid or a cylinder. The material of the box body 1 may be an alloy material such as an aluminum alloy, an iron alloy, or a polymer material such as polycarbonate, polyisocyanurate foam plastic, or a composite material such as glass fiber plus epoxy resin. In order to improve the sealing performance of the box body 1, a sealing member may also be provided between the cover body 3 and the side panel 12, such as a sealant, a sealing ring, etc. This application does not limit the above feasible settings.

[0138] Each battery cell 2 may be a secondary battery or a primary battery, a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 2 may be cylindrical, flat, rectangular or in other shapes.

[0139] Fig.12 Schematic diagram of the internal structure of a battery cell in some embodiments of the present application. A battery cell 2 refers to the smallest unit that constitutes a battery 100. Fig.12 As shown, the battery cell 2 further includes an end cover 21 , a housing 22 , an electrode assembly 23 and other functional components.

[0140] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 2 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Optionally, the end cap 21 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 21 is not easily deformed when squeezed and collided, so that the battery cell 2 can have a higher structural strength and the safety performance can also be improved. Functional components such as electrode terminals 211 and explosion-proof valves are provided on the end cap 21. The electrode terminal 211 can be used to electrically connect with the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 2. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism 212 for releasing the internal pressure when the internal pressure or temperature of the battery cell 2 reaches a threshold. The material of the end cap 21 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 21, and the insulating member may be used to isolate the electrical connection plate in the housing 22 from the end cap 21 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0141] The shell 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 2, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte (not shown in the figure) and other components. The shell 22 and the end cap 21 can be independent components, and an opening can be set on the shell 22, and the internal environment of the battery cell 2 is formed by covering the opening with the end cap 21 at the opening. Without limitation, the end cap 21 and the shell 22 can also be integrated. Specifically, the end cap 21 and the shell 22 can form a common connection surface before other components are put into the shell, and when the interior of the shell 22 needs to be encapsulated, the end cap 21 covers the shell 22. The shell 22 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0142] The electrode assembly 23 is a component in the battery cell 2 where electrochemical reactions occur. One or more electrode assemblies 23 may be included in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 23, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the tabs connect the electrode terminals 211 to form a current loop.

[0143] In some optional embodiments of the present application, the battery 100 includes a box body 1 and a battery cell 2. The box body 1 has a top 101 and a bottom 102 relative to each other in the height direction Z. The opening 103 of the box body 1 is arranged at the bottom 102. The battery cell 2 is inverted in the box body 1 with the end cover 21 facing the bottom 102. The end cover 21 is provided with an electrode terminal 211 and a pressure relief mechanism 212, and the electrode terminal 211 and the pressure relief mechanism 212 face the bottom 102. The box body 1 also includes a cover body 3 arranged at the opening 103. There is a first distance H1 between the end cover 21 of the battery cell 2 and the cover body 3. The first distance H1 satisfies 2mm

[0144] In some cases, the battery 100 of the embodiment of the present application is placed upside down in the box 1 with the end cover 21 of the battery cell 2 facing the bottom 102, which can enhance the rigidity of the top of the battery 100; the electrode terminal 211 and the pressure relief mechanism 212 are arranged together toward the bottom 102, which can improve the safety of the battery 100.

[0145] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, but these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.​

Claims

1. A battery, characterized in that: include: A box body (1) having a top (101) and a bottom (102) opposite to each other along the height direction of the box body (1), the bottom (102) being provided with an opening (103), and the box body (1) comprising a cover body (3) arranged at the opening (103); A battery cell (2), the battery cell (2) being placed upside down in the box body (1) with the end cover (21) facing the bottom (102), the end cover (21) being provided with a pressure relief mechanism (212) and an electrode terminal (211), the pressure relief mechanism (212) and the electrode terminal (211) both being arranged facing the bottom (102); In the height direction, there is a first distance H1 between the end cover (21) of the battery cell (2) and the cover body (3), and the ratio H1 / M of the first distance H1 to the weight M of a single battery cell (2) satisfies 0.2 mm / Kg<H1 / M<50 mm / Kg.

2. The battery according to claim 1, characterized in that The box body (1) comprises a support plate (11) and a side plate (12); the support plate (11) is arranged on the top (101); and the battery is fixedly connected to the support plate (11).

3. The battery according to claim 2, characterized in that The side panels (12) are connected to each other to form a frame structure, and the cover body (3) is fixedly connected to the side panels (12).

4. The battery according to claim 3, characterized in that The first distance H1 satisfies 2 mm<H1<30 mm.

5. The battery according to claim 3, characterized in that The battery further comprises a protection component (4), wherein the protection component (4) is arranged between the battery cell (2) and the cover body (3) to protect the pressure relief mechanism (212) and the electrode terminal (211).

6. The battery according to claim 5, characterized in that The protection assembly (4) comprises a plurality of protection members (41) spaced apart and distributed along the length direction of the box body (1), a plurality of battery cells (2) are provided, and the pressure relief mechanism (212) and the electrode terminal (211) of each battery cell (2) are located between two adjacent protection members (41).

7. The battery according to claim 6, characterized in that The plurality of protective members (41) include an edge protective member (411), a first protective member (412) and a second protective member (413); along the length direction, the edge protective member (411) is arranged at both side edges of the plurality of battery cells (2) arranged in an array, and the first protective member (412) and the second protective member (413) are alternately distributed between two edge protective members (411).

8. The battery according to claim 7, characterized in that Along the width direction of the box body (1), the extension length of the first protective member (412) is greater than the extension length of the second protective member (413).

9. The battery according to claim 7, characterized in that Along the length direction, the widths of the first protection member (412) and the second protection member (413) are greater than the width of the edge protection member (411).

10. The battery according to any one of claims 7 to 9, characterized in that: The end cover (21) comprises a functional area (201) and a shoulder (202); along the length direction, the shoulder (202) is located on both sides of the functional area (201); the functional area (201) is provided with the pressure relief mechanism (212) and the electrode terminal (211); and the protective member (41) is fixedly connected to the shoulder (202).

11. The battery according to claim 10, characterized in that Along the length direction, the width D1 of the edge protection piece (411), the width D2 of the first protection piece (412), the width D3 of the second protection piece (413), and the width D4 of the shoulder (202) satisfy: 0.2D4≤D1≤D4, 0.5D4≤D2≤2D4, and 0.5D4≤D3≤2D4.

12. The battery according to any one of claims 6 to 9, characterized in that: In the height direction, the extension height of the protection member (41) is greater than the extension height of the electrode terminal (211).

13. The battery according to any one of claims 5 to 9, characterized in that: The battery further comprises an insulating plate body (42), wherein the insulating plate body (42) is arranged between the protective component (4) and the cover body (3).

14. The battery according to claim 13, characterized in that The insulating plate body (42) is fixedly connected to the cover body (3).

15. An electrical device, characterized in that: The invention comprises a battery according to any one of claims 1 to 14, wherein the battery is used to provide electrical energy.

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