Battery and electric equipment

Abstract

The utility model discloses a battery and electric equipment, and belongs to the technical field of batteries. The utility model provides a battery which comprises a box body and a battery monomer group, the box body comprises a bottom wall and a side wall, and the side wall is arranged on the bottom wall in a surrounding manner. The battery monomer group is arranged in the box body and comprises a plurality of battery monomers; the battery further comprises a protection part, the protection part comprises a first part and a second part, the first part is located between the bottom wall and the battery monomer group, the second part is located between the side wall and the battery monomer group, and the first part and the second part are integrally formed. The first part and the second part which are integrally formed can absorb impact energy at the bottom and side surfaces of the battery, so that the risk of damage to the battery monomers in the battery is reduced, and the reliability of the battery is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery and an electrical device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] How to improve battery reliability is an urgent problem to be solved in battery technology. Utility Model Content

[0004] In view of the above problems, the present application provides a battery and an electrical device, which can improve the reliability of the battery.

[0005] In a first aspect, the present application provides a battery, the battery comprising a box body and a battery cell group, the box body comprising a bottom wall and a side wall, the side wall being arranged around the bottom wall. The battery cell group is arranged in the box body, and the battery cell group comprises a plurality of battery cells. The battery further comprises a protective member, the protective member comprising a first part and a second part, the first part being located between the bottom wall and the battery cell group, the second part being located between the side wall and the battery cell group, and the first part and the second part being integrally formed.

[0006] In the technical solution of the embodiment of the present application, the integrally formed first part and second part can absorb the impact energy of the bottom and sides of the battery, reduce the risk of damage to the battery cells inside the battery, and help improve the reliability of the battery.

[0007] In one or more embodiments of the first aspect, two second parts are provided, the two second parts are spaced apart along the first direction, the battery cell group is located between the two second parts, and the first part connects the two second parts.

[0008] In the above solution, the two second parts can absorb the impact energy on both sides of the battery side in the first direction, which can further reduce the risk of damage to the battery cells inside the battery, thereby further improving the reliability of the battery.

[0009] In one or more embodiments of the first aspect, the protective element includes a main body, and the main body is an elastomeric material.

[0010] In the above solution, when the protective element is subjected to impact force, the main body may undergo a certain deformation to absorb part of the energy, thereby reducing the risk of damage to the battery cell.

[0011] In one or more embodiments of the first aspect, the elastomeric material is polypropylene, polypropylene, nylon or polyurethane.

[0012] In the above scheme, polypropylene, polypropylene, nylon or polyurethane is used to manufacture the main body, which is beneficial to saving the manufacturing cost of the protective part.

[0013] In one or more embodiments of the first aspect, the protective element further includes a skin covering an outer surface of the main body.

[0014] In the above scheme, by providing a skin on the outer surface of the protective element, the protective element can have a certain energy absorption capacity while having a relatively high strength on the outer surface, thereby reducing the risk of damage to the protective element and helping to increase the service life of the protective element.

[0015] In one or more embodiments of the first aspect, the material of the skin is epoxy resin fiberglass.

[0016] In the above scheme, epoxy resin glass fiber is used to manufacture the skin, which is beneficial to saving the manufacturing cost of the protective part.

[0017] In one or more embodiments of the first aspect, the first portion has a first surface facing the battery cell group, the second portion has a second surface facing the battery cell group, and a gap is provided between the second surface and the battery cell group, and the gap gradually increases in a direction away from the first surface.

[0018] In the above solution, since there is a gradually increasing gap between the second surface and the battery cell group, the battery cell group can be guided during the assembly process of the protective member, thereby reducing the difficulty of assembly.

[0019] In one or more embodiments of the first aspect, the second surface includes a first section and a second section, the second section is farther away from the first surface than the first section, the first section is in contact with the battery cell group, and a gap is formed between the second section and the battery cell group.

[0020] In the above solution, the first section fits with the battery cell group, which means that the first section can limit the battery cell group, which is beneficial to reduce the risk of battery cell shaking, thereby helping to improve the structural stability of the battery.

[0021] In one or more embodiments of the first aspect, the first portion has a first surface facing the battery cell group, and a plurality of convex portions are arranged at intervals on the first surface.

[0022] In the above solution, there will be cavities between adjacent convex parts, which can provide space for the convex parts to deform, which is beneficial to further improve the ability of the first part to absorb impact energy.

[0023] In one or more embodiments of the first aspect, the plurality of protrusions are spaced apart along a first direction, each protrusion is a rib extending along a second direction, and the first direction is perpendicular to the second direction.

[0024] In the above scheme, the processing difficulty of the convex rib extending in a single direction is relatively low and the production efficiency is relatively high.

[0025] In one or more embodiments of the first aspect, a pressure relief mechanism is provided on a side of the battery cell facing the first portion, and along a thickness direction of the first portion, a projection of the pressure relief mechanism does not overlap with a projection of the convex portion.

[0026] In the above scheme, since the projection of the pressure relief mechanism does not overlap with the convex portion, when the battery cell thermally runs away, the gas can flow more smoothly between adjacent convex portions, making the battery pressure relief smoother, which is beneficial to improving the reliability of the battery during use.

[0027] In one or more embodiments of the first aspect, the box has an opening. The battery further includes a cover body, the cover body closes the opening, and the battery cell group is connected to the cover body.

[0028] In the above solution, after the cover body is separated from the box body, the battery cell group can be removed at the same time, which is convenient for replacing the battery cell group and helps to reduce the maintenance cost of the battery.

[0029] In a second aspect, the present application provides an electrical device, which includes the battery in one or more embodiments of the first aspect, and the battery is used to provide electrical energy.

[0030] In the above scheme, since the battery in one or more embodiments of the first aspect has high reliability, the electrical equipment including the battery in one or more embodiments of the first aspect also has high reliability.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0033] Figure 1 A schematic diagram of the structure of a vehicle according to some embodiments of the present application;

[0034] Figure 2 An exploded view of a battery according to some embodiments of the present application;

[0035] Figure 3 An exploded view of a battery cell according to some embodiments of the present application;

[0036] Figure 4 Exploded diagrams of batteries according to other embodiments of the present application;

[0037] Figure 5 are cross-sectional views of batteries according to other embodiments of the present application;

[0038] Figure 6 for Figure 5 A partial enlarged view of the middle A;

[0039] Figure 7 for Figure 5 A partial enlarged view of point B in the middle.

[0040] The reference numerals in the specific implementation manner are as follows:

[0041] 1000-vehicle; 200-controller; 300-motor; 100-battery; 11-box assembly; 111-first box body; 112-second box body; 12-battery cell; 121-housing; 1211-end cover; 1212-shell; 122-electrode assembly; 123-pressure relief mechanism; 124-adapter; 125-electrode terminal; 13-protective member; 131-first part; 1311-first surface; 1312-convex portion; 132-second part; 1321-second surface; 13211-first section; 13212-second section; 113-cover; 114-box; 1141-bottom wall; 1142-side wall; 14-gap; X-first direction; Y-second direction. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein 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 figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0045] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations 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. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0047] In the present application, battery cells may include but are not limited to lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries or magnesium-ion batteries, etc. The shape of the battery cell may include but is not limited to a cylinder, a flat body, a rectangular parallelepiped or other shapes, etc. The battery cell may include but is not limited to a cylindrical battery cell, a square battery cell, a soft-pack battery cell and a blade battery cell according to the packaging method.

[0048] In some high-power applications such as electric vehicles, the application of batteries includes three levels: battery cells, battery modules and batteries. The battery module is formed by electrically connecting a certain number of battery cells together and placing them in a frame in order to protect the battery cells from external impact, heat, vibration, etc. The battery refers to the final state of the battery system installed in the electric vehicle. The battery mentioned in the embodiments of the present application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. The battery generally includes a casing for encapsulating one or more battery cells. The casing can reduce the risk of liquid or other foreign matter affecting the charging or discharging of the battery cells.

[0049] The following will mainly focus on the rectangular battery cell. It should be understood that the embodiments described below are also applicable to cylindrical battery cells, soft-pack battery cells, or blade battery cells in some aspects.

[0050] In a common battery cell structure, the battery cell includes a housing, an electrode assembly and an electrolyte. The housing includes an end cap and a shell, and the end cap closes an opening of the shell to define a receiving space for receiving the electrode assembly.

[0051] The electrode assembly is contained in the containing space, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode collector, the positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer, and the positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode collector, the negative electrode collector not coated with the negative electrode active material layer protrudes from the negative electrode collector coated with the negative electrode active material layer, and the negative electrode collector not coated with the negative electrode active material layer serves as a negative electrode ear. The material of the negative electrode collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to pass a large current without melting, the number of positive tabs is multiple and stacked together, and the number of negative tabs is multiple and stacked together. In addition, the electrode assembly can be formed in a manner including but not limited to a winding type or a lamination type.

[0052] The tab generally leads the electrical energy of the electrode assembly by being electrically connected to a conductive member. In some cases, the conductive member is a transition piece connecting the tab and the electrode terminal. In other cases, the conductive member is an electrode terminal.

[0053] The electrode terminals generally include a positive electrode terminal and a negative electrode terminal. For a rectangular battery cell, the electrode terminals are generally provided at the end cap portion. In some other cases, the electrode terminals may also be provided at the housing portion. Multiple battery cells are connected in series and / or in parallel via the electrode terminals for various applications.

[0054] The development of battery technology must take into account many design factors at the same time, such as energy density, cycle life, discharge capacity, charge and discharge rate and other performance parameters. In addition, battery reliability must also be considered.

[0055] Ordinary batteries only have hollow collapse structures on the side beams of the box body, which can only provide certain protection when the box body is hit from the side. However, when the bottom of the box body is impacted, its protection ability is poor. After the impact force is transmitted to the battery cell, the battery cell is easily damaged, and the reliability of the battery is poor.

[0056] In view of this, the present application provides a battery, the battery includes a box body and a battery cell group, the box body includes a bottom wall and a side wall, and the side wall is surrounded by the bottom wall. The battery cell group is arranged in the box body, and the battery cell group includes a plurality of battery cells. Among them, the battery also includes a protective member, the protective member includes a first part and a second part, the first part is located between the bottom wall and the battery cell group, the second part is located between the side wall and the battery cell group, and the first part and the second part are integrally formed. The integrally formed first part and second part can absorb the impact energy of the bottom and sides of the battery, reduce the risk of damage to the battery cells inside the battery, and help improve the reliability of the battery.

[0057] The technical solutions described in the embodiments of the present application are applicable to batteries and electrical equipment using batteries.

[0058] Electrical equipment includes, but is not limited to: battery vehicles, electric vehicles, ships, and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.

[0059] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0060] For example, Figure 1 The schematic diagram of the structure of the vehicle 1000 of some embodiments of the present application, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. The motor 300, the controller 200 and the battery 100 can be arranged inside the vehicle 1000, and the controller 200 is used to control the battery 100 to power the motor 300. For example, the battery 100 can be arranged at the bottom or the front or the rear of the vehicle 1000. The battery 100 can be used for powering the vehicle 1000, for example, the battery 100 can be used as the operating power supply of the vehicle 1000, for the circuit system of the vehicle 1000, for example, for the working power demand of the vehicle 1000 during startup, navigation and operation. In another embodiment of the present application, the battery 100 can not only be used as the operating power supply of the vehicle 1000, but also as the driving power supply of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0061] In order to meet different power requirements, the battery 100 may include a plurality of battery cells 12, wherein the plurality of battery cells 12 may be connected in series, in parallel, or in a hybrid connection, wherein the hybrid connection refers to a mixture of series and parallel connections. The battery 100 may also be referred to as a battery pack. Optionally, a plurality of battery cells 12 may first be connected in series, in parallel, or in a hybrid connection to form a battery module, and a plurality of battery modules may then be connected in series, in parallel, or in a hybrid connection to form the battery 100. In other words, a plurality of battery cells 12 may directly form the battery 100, or they may first form a battery module, and then the battery module may form the battery 100.

[0062] For example, see Figure 2 , Figure 2 The battery 100 of some embodiments of the present application is an exploded view. The battery 100 may include a plurality of battery cells 12. The battery 100 may also include a box assembly 11. The box assembly 11 generally has a receiving space. The plurality of battery cells 12 are received in the receiving space. Figure 2 As shown, they are respectively referred to as the first box body 111 and the second box body 112, and the first box body 111 and the second box body 112 are buckled together. The shapes of the first box body 111 and the second box body 112 can be determined according to the shapes of the combination of multiple battery monomers, and the first box body 111 and the second box body 112 can both be hollow structures with an open surface on one side. For example, the first box body 111 and the second box body 112 can both be hollow cuboids and each has only one open surface, the open surface of the first box body 111 and the open surface of the second part 132 are arranged opposite to each other, and the first box body 111 and the second box body 112 are buckled together to form a box assembly 11 with a closed chamber. After the multiple battery monomers 12 are connected in parallel, in series, or in mixed combination, they are placed in the box assembly 11 formed after the first box body 111 and the second box body 112 are buckled.

[0063] Optionally, the battery 100 may also include other structures, which are not described one by one here. For example, the battery 100 may also include a busbar component, which is used to realize electrical connection between multiple battery cells 12, such as parallel connection, series connection, or mixed connection. Specifically, the busbar component can realize electrical connection between battery cells 12 by connecting the electrode terminals 125 of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals 125 of the battery cells 12 by welding. The electrical energy of multiple battery cells 12 can be further led out through the box assembly 11 through a conductive mechanism.

[0064] According to different power requirements, the number of battery cells 12 can be set to any value. Multiple battery cells 12 can be connected in series, parallel or hybrid to achieve a larger capacity or power. Since the number of battery cells 12 included in each battery 100 may be large, for ease of installation, the battery cells 12 can be grouped, and each group of battery cells constitutes a battery module. The number of battery cells 12 included in the battery module is not limited and can be set according to demand. The battery 100 may include multiple battery modules, which can be connected in series, parallel or hybrid.

[0065] Please refer to Figure 3 As shown, Figure 3The exploded view of the battery cell 12 of some embodiments of the present application, the battery cell 12 includes one or more electrode assemblies 122 and a shell 121. The shell 121 may include a shell 1212, and the multiple walls of the shell 1212, that is, the multiple walls of the shell 121, form a cavity, and this cavity can be used to accommodate the electrode assembly 122. The shell 1212 is determined according to the shape of the one or more electrode assemblies 122 after being combined. For example, the shell 1212 can be a hollow cuboid or a cube or a regular polyhedron, and one of the faces of the shell 1212 is an open face so that one or more electrode assemblies 122 can be placed in the shell 1212. The shell 1212 is filled with an electrolyte, such as an electrolyte.

[0066] The battery cell 12 may also include two electrode terminals 125, which may be disposed on the end cap 1211. The end cap 1211 is generally in the shape of a flat plate, and the two electrode terminals 125 are fixed on the flat surface of the end cap 1211, and the two electrode terminals 125 are respectively a positive electrode terminal 125 and a negative electrode terminal 125. Each electrode terminal 125 is provided with a corresponding adapter 124, which is located between the end cap 1211 and the electrode assembly 122, and is used to electrically connect the electrode assembly 122 and the electrode terminal 125. In the battery cell 12, according to actual use requirements, the electrode assembly 122 may be provided as a single one, or as a plurality of ones, and a plurality of independent electrode assemblies 122 are provided in the battery cell 12.

[0067] According to some embodiments of this application, please refer to Figure 4-Figure 5 The battery 100 includes a box body 114 and a battery cell group. The box body 114 includes a bottom wall 1141 and a side wall 1142. The side wall 1142 is surrounded by the bottom wall 1141. The battery cell group is arranged in the box body 114. The battery cell group includes a plurality of battery cells 12. The battery 100 also includes a protective member 13. The protective member 13 includes a first portion 131 and a second portion 132. The first portion 131 is located between the bottom wall 1141 and the battery cell group, and the second portion 132 is located between the side wall 1142 and the battery cell group. The first portion 131 and the second portion 132 are integrally formed.

[0068] The box body 114 has a receiving cavity, and the battery cell group is received in the receiving cavity.

[0069] The bottom wall 1141 is the wall portion at the bottom of the box body 114 after the battery 100 is assembled to the electrical equipment.

[0070] In some embodiments, the battery 100 further includes a cover 113 , the box 114 has an opening, the cover 113 closes the opening, the wall of the box 114 opposite to the cover 113 is a bottom wall 1141 , and the battery cell group is connected to the bottom wall 1141 .

[0071] In some embodiments, please refer to Figure 4 The battery cell group includes a plurality of battery cells 12 , the plurality of battery cells 12 form a plurality of rows of battery cells 12 , the plurality of rows of battery cells 12 are spaced apart along a first direction X, and each row of battery cells 12 includes a plurality of battery cells 12 spaced apart along a second direction Y.

[0072] The protective member 13 generally has a certain compression performance. When the protective member 13 is impacted, it can be deformed or collapsed to absorb the impact energy.

[0073] In some embodiments, the first portion 131 and the second portion 132 are hollow structures and have the ability to collapse and absorb energy.

[0074] The first portion 131 is located between the bottom wall 1141 and the battery cell group, which means that the protective member 13 has the ability to absorb the impact energy of the bottom of the battery 100. The second portion 132 is located between the side wall 1142 and the battery cell group, which means that the protective member 13 has the ability to absorb the impact energy of the side of the battery 100.

[0075] In some embodiments, the side wall 1142 may include two first side walls 1142 disposed oppositely along the first direction X and two second side walls 1142 disposed oppositely along the second direction Y, four second parts 132 are provided, and a second part 132 is provided between each first side wall 1142 and each second side wall 1142 and the battery cell group, and the four second parts 132 are connected to the first part 131. In this embodiment, the protective member 13 is basin-shaped. In other embodiments, two second parts 132 are provided, and a second part 132 is provided between each second side wall 1142 and the battery cell group. In this embodiment, the cross-section of the protective member 13 is U-shaped.

[0076] In some embodiments, the first portion 131 and the second portion 132 may be integrally foamed.

[0077] In some embodiments, the compressive strength of the protective member 13 is lower than the compressive strength of the box body 114 .

[0078] In some embodiments, the protection member 13 may be bonded to the wall of the box body 114 .

[0079] In the technical solution of the embodiment of the present application, the integrally formed first part 131 and second part 132 can absorb the impact energy of the bottom and sides of the battery 100, reduce the risk of damage to the battery cells 12 inside the battery 100, and help improve the reliability of the battery 100.

[0080] According to some embodiments of this application, please refer to Figure 4-Figure 5There are two second parts 132 , the two second parts 132 are spaced apart along the first direction X, the battery cell group is located between the two second parts 132 , and the first part 131 connects the two second parts 132 .

[0081] The first part 131 connects the two second parts 132, which means that the protective member 13 is U-shaped. The U-shaped protective member 13 can be directly covered on the battery cell group. In some embodiments, part of the inner surface of the protective member 13 can be in contact with the battery cell group, that is, the protective member 13 can also limit the battery cell group.

[0082] Taking the electric device as a vehicle 1000 as an example, after the battery 100 is assembled to the vehicle 1000, the first direction X is the width direction of the vehicle 1000. Since the risk of the impact force being transmitted to the battery 100 when the two sides of the width direction of the vehicle 1000 are impacted is relatively high, the two second portions 132 spaced apart along the first direction X can significantly improve the reliability of the battery 100.

[0083] In some embodiments, the first direction X is the length direction of the battery cell 12 .

[0084] In the embodiment where the side wall 1142 includes two first side walls 1142 disposed opposite to each other along the first direction X and two second side walls 1142 disposed opposite to each other along the second direction Y, the second portion 132 is disposed between the first side walls 1142 and the battery cell group.

[0085] In the above solution, the two second parts 132 can absorb the impact energy on both sides of the battery 100 in the first direction X, which can further reduce the risk of damage to the battery cells 12 inside the battery 100, thereby further improving the reliability of the battery 100.

[0086] According to some embodiments of this application, please refer to Figure 4-Figure 5 The protective member 13 includes a main body, which is made of an elastomeric material.

[0087] The main body is made of an elastomeric material, which means that when the protective element 13 is subjected to an impact force, the main body can undergo a certain deformation to absorb part of the energy.

[0088] The elastomeric material may include, but is not limited to, plastic or composite materials, etc. In the embodiment where the elastomeric material is plastic, the elastomeric material may include, but is not limited to, thermoplastics or thermosetting plastics, etc.

[0089] In the above solution, the main body has a certain elasticity and can absorb impact energy, thereby reducing the risk of damage to the battery cell 12.

[0090] According to some embodiments of the present application, the elastomeric material is polypropylene, polypropylene, nylon or polyurethane.

[0091] In the embodiment where the elastomeric material is a thermoplastic, the elastomeric material includes but is not limited to polypropylene, polypropylene, nylon, etc. In the embodiment where the elastomeric material is a thermosetting plastic, the elastomeric material includes but is not limited to polyurethane, etc.

[0092] In the above solution, polypropylene, polypropylene, nylon or polyurethane is used to manufacture the main body, which is beneficial to saving the manufacturing cost of the protective member 13.

[0093] According to some embodiments of this application, please refer to Figure 4-Figure 5 The protective member 13 further comprises a skin, which covers the outer surface of the main body.

[0094] In some embodiments, the skin may be pre-processed and then placed in a mold to compositely mold the skin and the main body.

[0095] The compressive strength of the skin is generally greater than that of the main body, which can enhance the strength of the protective element 13 to a certain extent.

[0096] The outer surface of the main body refers to the surface of the main body facing away from the battery cell group.

[0097] In the above scheme, by providing a skin on the outer surface of the protective member 13, the protective member 13 can have a certain energy absorption capacity while having a relatively high strength on the outer surface, thereby reducing the risk of damage to the protective member 13 and helping to increase the service life of the protective member 13.

[0098] According to some embodiments of the present application, the material of the skin is epoxy resin fiberglass.

[0099] Epoxy fiberglass is a composite material composed of epoxy resin and glass fiber, in which glass fiber is the reinforcing material and epoxy resin is the matrix material. This composite material is formed by impregnating glass fiber in epoxy resin and undergoing a curing reaction.

[0100] In the above solution, epoxy resin glass fiber is used to manufacture the skin, which is beneficial to saving the manufacturing cost of the protective member 13.

[0101] According to some embodiments of this application, please refer to Figure 4-Figure 6 The first portion 131 has a first surface 1311 facing the battery cell group, the second portion 132 has a second surface 1321 facing the battery cell group, and a gap 14 is formed between the second surface 1321 and the battery cell group. The gap 14 gradually increases in a direction away from the first surface 1311 .

[0102] When the battery cell assembly and the protection member 13 are assembled with each other, the gap 14 gradually increases in the direction away from the first surface 1311 and has a guiding function, so that the battery cell assembly can be inserted into the inner side of the protection member 13 along the gap 14 .

[0103] In the above solution, since there is a gradually increasing gap 14 between the second surface 1321 and the battery cell group, the battery cell group can be guided during the assembly process of the protective member 13, thereby reducing the difficulty of assembly.

[0104] According to some embodiments of this application, please refer to Figure 4-Figure 6 The second surface 1321 includes a first section 13211 and a second section 13212 . The second section 13212 is farther away from the first surface 1311 than the first section 13211 . The first section 13211 is in contact with the battery cell group, and a gap 14 is formed between the second section 13212 and the battery cell group.

[0105] The first section 13211 fits the battery cell group, which means that the protective member 13 can limit the battery cell group.

[0106] In the above solution, the first section 13211 fits the battery cell group, which means that the first section 13211 can limit the battery cell group, which is beneficial to reduce the risk of shaking of the battery cell 12, thereby helping to improve the structural stability of the battery 100.

[0107] According to some embodiments of this application, please refer to Figure 4-Figure 6 The first portion 131 has a first surface 1311 facing the battery cell group, and a plurality of convex portions 1312 are arranged at intervals on the first surface 1311 .

[0108] The multiple protrusions 1312 are arranged at intervals, which means that there will be cavities between adjacent protrusions 1312. When the bottom of the battery 100 is impacted, the cavity can provide space for the deformation of the protrusions 1312, thereby improving the ability of the first part 131 to absorb impact energy.

[0109] The convex portion 1312 may be a boss, a convex rib, or the like.

[0110] In some embodiments, the plurality of protrusions 1312 are arranged in a matrix.

[0111] The shape of the protrusion 1312 may include but is not limited to a truncated cone, a long strip, etc.

[0112] In some embodiments, the protrusion 1312 is integrally formed with the first portion 131 .

[0113] In the above solution, there is a cavity between adjacent protrusions 1312, which can provide space for the protrusions 1312 to deform, which is beneficial to further improve the ability of the first part 131 to absorb impact energy.

[0114] According to some embodiments of this application, please refer to Figure 4-Figure 6, a plurality of convex portions 1312 are arranged at intervals along the first direction X, each convex portion 1312 is a convex rib extending along the second direction Y, and the first direction X is perpendicular to the second direction Y.

[0115] In some embodiments, the second direction Y is parallel to the thickness direction of the battery cell 12 .

[0116] In the above scheme, the convex ribs extending in a single direction have regular shapes, are less difficult to process, and have higher production efficiency.

[0117] According to some embodiments of this application, please refer to Figure 4-Figure 7 A pressure relief mechanism 123 is disposed on one side of the battery cell 12 facing the first portion 131 , and along the thickness direction of the first portion 131 , the projection of the pressure relief mechanism 123 does not overlap with the projection of the convex portion 1312 .

[0118] The pressure relief mechanism 123 refers to an element or component that is actuated to release the internal pressure or temperature when the internal pressure or temperature or other conditions of the battery cell 12 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, negative electrode plate, electrolyte and isolation membrane in the battery cell 12. The pressure relief mechanism 123 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 or temperature-sensitive element or structure, that is, when the internal pressure or temperature or other conditions of the battery cell 12 reaches a predetermined threshold, the pressure relief mechanism 123 performs an action or a weak structure provided in the pressure relief component is destroyed, thereby forming an opening or channel for internal pressure or temperature to be released. Generally, the melting point and / or thickness of the weak structure are lower than other areas of the pressure relief component. For example, the weak structure can be a notched groove set on the surface of the pressure relief mechanism 123.

[0119] Along the thickness direction of the first portion 131 , the projection of the pressure relief mechanism 123 does not overlap with the projection of the protrusion 1312 , which means that when the battery cell 12 thermally runs away, the emissions discharged by the pressure relief mechanism 123 , such as high-temperature gas, can flow along the cavity between adjacent protrusions 1312 .

[0120] In the above solution, since the projection of the pressure relief mechanism 123 does not overlap with the convex portion 1312, when the battery cell 12 thermally runs away, the gas can flow more smoothly between adjacent convex portions 1312, making the pressure relief of the battery 100 smoother, which is beneficial to improving the reliability of the battery 100 during use.

[0121] According to some embodiments of this application, please refer to Figure 4-Figure 7 The box body 114 has an opening. The battery 100 further includes a cover body 113 , which closes the opening and to which the battery cell group is connected.

[0122] Generally, the cover 113 needs to be separated from the box 114 to maintain the components or battery cells 12 inside the battery 100. Since the battery cell group is connected to the cover 113, the battery cell group can be removed at the same time as the cover 113 is removed. In other words, the battery cell group will not be surrounded by the wall of the box 114, such as the side wall 1142, and the maintenance space is larger.

[0123] In the above solution, after the cover 113 is separated from the box body 114 , the battery cell group can be removed at the same time, which is convenient for replacing the battery cell group and helps to reduce the maintenance cost of the battery 100 .

[0124] According to some embodiments of this application, please refer to Figure 1 The present application provides an electrical device, which includes the battery 100 in one or more embodiments of the first aspect, and the battery 100 is used to provide electrical energy.

[0125] In the above scheme, since the battery 100 in one or more embodiments of the first aspect has high reliability, the electrical equipment including the battery 100 in one or more embodiments of the first aspect also has high reliability.

[0126] According to some embodiments of this application, please refer to Figure 4-Figure 7 The present application provides a battery 100, which includes a box 114, a battery cell group, a protective member 13 and a cover 113, wherein the box 114 has an opening, the cover 113 closes the opening, and the battery cell group is connected to the cover 113. The battery cell group is disposed in the box 114, and includes a plurality of battery cells 12.

[0127] The box body 114 includes a bottom wall 1141 and a side wall 1142, and the side wall 1142 is surrounded by the bottom wall 1141. The protective member 13 includes a first part 131 and a second part 132. The first part 131 is located between the bottom wall 1141 and the battery cell group, and the second part 132 is located between the side wall 1142 and the battery cell group. Two second parts 132 are provided, and the two second parts 132 are spaced apart along the first direction X. The battery cell group is located between the two second parts 132. The first part 131 connects the two second parts 132, and the first part 131 and the second part 132 are integrally formed.

[0128] The protective member 13 comprises a main body and a skin. The main body is made of an elastic material, and the skin covers the outer surface of the main body.

[0129] The first portion 131 has a first surface 1311 facing the battery cell group, and the second portion 132 has a second surface 1321 facing the battery cell group. The second surface 1321 includes a first section 13211 and a second section 13212. The second section 13212 is farther away from the first surface 1311 than the first section 13211. The first section 13211 is in contact with the battery cell group, and a gap 14 is formed between the second section 13212 and the battery cell group. The gap 14 gradually increases in a direction away from the first surface 1311.

[0130] The first surface 1311 is provided with a plurality of convex portions 1312 at intervals. The plurality of convex portions 1312 are arranged at intervals along the first direction X, and each convex portion 1312 is a convex rib extending along the second direction Y, and the first direction X is perpendicular to the second direction Y. A pressure relief mechanism 123 is provided on the side of the battery cell 12 facing the first portion 131, and along the thickness direction of the first portion 131, the projection of the pressure relief mechanism 123 does not overlap with the projection of the convex portion 1312.

[0131] Please refer to Figure 5 When the battery 100 is assembled, the protective member 13 can be placed in the box 114, and the first portion 131 is in contact with the bottom wall 1141. The battery cell group is first bonded to the cover 113, and then the cover 113 bonded with the battery cell group is buckled with the box 114. The gap 14 can guide the battery cell group, and the first section 13211 can guide the battery cell group. After the cover 113 and the box 114 are buckled, the assembly of the battery cell group and the protective member 13 is completed.

[0132] 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 them; 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: include: A box body, the box body comprising a bottom wall and side walls, the side walls being arranged around the bottom wall; A battery cell group is disposed in the box, and the battery cell group includes a plurality of battery cells; The battery further comprises a protective member, which comprises a first part and a second part, wherein the first part is located between the bottom wall and the battery cell group, and the second part is located between the side wall and the battery cell group, and the first part and the second part are integrally formed.

2. The battery according to claim 1, characterized in that There are two second parts, the two second parts are spaced apart along the first direction, the battery cell group is located between the two second parts, and the first part connects the two second parts.

3. The battery according to claim 1, characterized in that The guard comprises a main body, the main body being an elastomeric material.

4. The battery according to claim 3, characterized in that The elastic material is polypropylene, polypropylene, nylon or polyurethane.

5. The battery according to claim 3, characterized in that The protective member further includes a skin covering an outer surface of the main body.

6. The battery according to claim 5, characterized in that The material of the skin is epoxy resin glass fiber.

7. The battery according to any one of claims 1 to 6, characterized in that The first portion has a first surface facing the battery cell group, the second portion has a second surface facing the battery cell group, a gap is formed between the second surface and the battery cell group, and the gap gradually increases in a direction away from the first surface.

8. The battery according to claim 7, characterized in that The second surface includes a first section and a second section. The second section is farther away from the first surface than the first section. The first section is in contact with the battery cell group, and the gap is formed between the second section and the battery cell group.

9. The battery according to any one of claims 1 to 6, characterized in that The first portion has a first surface facing the battery cell group, and a plurality of convex portions are arranged at intervals on the first surface.

10. The battery according to claim 9, characterized in that A plurality of the convex portions are arranged at intervals along a first direction, each of the convex portions is a convex rib extending along a second direction, and the first direction is perpendicular to the second direction.

11. The battery according to claim 9, characterized in that A pressure relief mechanism is provided on a side of the battery cell facing the first portion, and along a thickness direction of the first portion, a projection of the pressure relief mechanism does not overlap with a projection of the convex portion.

12. The battery according to any one of claims 1 to 6, characterized in that The box body has an opening; The battery further includes a cover body, the cover body closes the opening, and the battery cell group is connected to the cover body.

13. An electrical equipment, characterized in that: The invention comprises a battery as claimed in any one of claims 1 to 12, wherein the battery is used to provide electrical energy.

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