Battery cells, batteries, and power consuming devices

Abstract

The present application discloses a battery cell, a battery, and a power consumption device. The battery cell includes a housing, an electrode assembly, a detection assembly, and a protection assembly, the housing has a receiving chamber, the electrode assembly is received in the receiving chamber, the detection assembly is connected to the housing and is used for detecting the working state of the battery cell, the protection assembly protrudes from the housing and is provided on the same side as the detection assembly to protect the detection assembly. The embodiments of the present application can effectively improve the safety and reliability of the battery cell.

Description

[Technical field]

[0001] TECHNICAL FIELD This application relates to the field of batteries, and in particular to battery cells, batteries, and power consuming devices. [Background technology]

[0002] Battery cells are widely used in electronic devices such as mobile phones, laptops, electric motorcycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy planes, power tools, etc. The battery cells may include cadmium nickel battery cells, nickel hydrogen battery cells, lithium ion battery cells, secondary alkaline zinc manganese battery cells, etc.

[0003] In the development of battery technology, one of the research topics is how to improve the stability of battery cells. Summary of the Invention

[0004] In view of the above problems, the embodiments of the present application provide a battery cell, a battery, and a power consuming device that can effectively improve the safety and reliability of the battery cell.

[0005] In a first aspect, an embodiment of the present application provides a battery cell including a housing, an electrode assembly, a detection assembly, and a protection assembly, the housing having a storage chamber, the electrode assembly being accommodated in the storage chamber, the detection assembly being connected to the housing and being used to detect an operating state of the battery cell, the protection assembly protruding from the housing and being provided on the same side as the detection assembly so as to protect the detection assembly.

[0006] In the above technical solution, the detection assembly is provided in the battery cell, so that the working state of the battery cell can be easily controlled in real time, and the abnormal parameters during the operation of the battery cell can be quickly and early warned, so that the corresponding safety mechanism or staff can respond in a timely manner, and further improve the safety and reliability of the battery cell. The protection assembly for protecting the detection assembly is provided, so that the risk of the detection assembly being damaged during the use of the battery cell can be reduced.

[0007] In some embodiments of the first aspect, the housing includes a first wall, and the detection assembly is connected to the first wall.

[0008] In some embodiments of the first aspect, the detection assembly is located on a side of the first wall away from the chamber.

[0009] The above technical solution can reduce the internal space of the battery cell occupied by the detection assembly and the protection assembly, and facilitate the installation and replacement of the detection assembly and the protection assembly.

[0010] In some embodiments of the first aspect, the housing includes an electrode terminal protruding from a surface of the first wall facing away from the storage chamber, the electrode terminal electrically connected to a tab of the electrode assembly, and the detection assembly electrically connected to the electrode terminal, such that a connection is formed with the electrode terminal.

[0011] In some embodiments of the first aspect, the protective assembly includes a first protective member protruding from a surface of the electrode terminal facing away from the first wall and separating the surface of the electrode terminal facing away from the first wall from the connection portion.

[0012] In the above technical solution, a first protective member is provided on the surface of the electrode terminal facing away from the first wall, and separates the connection portion from the central region of the surface of the electrode terminal facing away from the first wall, thereby reducing the risk of the detection assembly being damaged during the chemical formation process of the battery cell.

[0013] In some embodiments of the first aspect, the first protective member is distributed in a segment ring or in a ring shape along the circumferential direction of the electrode terminal.

[0014] In the above technical solution, the first protective member is provided in a structure distributed in a segment ring along the circumferential direction of the electrode terminal, so that the connection part can be protected more clearly. The protection of the detection assembly can be realized with less material, and the cost can be effectively reduced. The first protective member is provided in a structure distributed in a ring shape along the circumferential direction of the electrode terminal, so that the first protective member can be isolated around the entire central area of ​​the electrode terminal, maximizing the protection range of the first protective member and effectively improving the protection effect of the first protective member on the detection assembly.

[0015] In some embodiments of the first aspect, the first protective member includes a main body portion and a recessed portion, and the recessed portion is formed recessed from the main body portion in a direction toward the center point of the electrode terminal so as to recess the connection portion.

[0016] In the above technical solution, the retracted portion of the first protective member allows the body of the first protective member to be closer to the edge of the electrode terminal, and the effect of the first protective member on the plug-in connection between the chemical nail and the electrode terminal can be effectively reduced. Furthermore, the protective area formed by the first protective member near the connection portion can be enlarged, and the protective effect of the first protective member on the detection assembly can be further enhanced.

[0017] In some embodiments of the first aspect, along a thickness direction of the first wall, the first protective member has a dimension h1 and the connection portion has a dimension h2, where h1>h2.

[0018] In the above technical solution, the dimension h1 of the first protective member is set to be larger than the dimension h2 of the connection portion along the thickness direction of the first wall, so that the first protective member can sufficiently separate the connection portion from the central region of the electrode terminal. This can reduce the risk of the connection portion being damaged by contacting the connection portion when the insertion connection of the chemical nail is misaligned during the chemical formation process of the battery cell. This further enhances the protective effect of the first protective member on the detection assembly.

[0019] In some embodiments of the first aspect, h1 and h2 satisfy the relationship h1-h2≧1 mm.

[0020] In the above technical proposal, the protective effect of the first protective member can be further improved by setting the relationship between the dimension h1 of the first protective member and the dimension h2 of the connection portion within the above range along the thickness direction of the first wall.

[0021] In some embodiments of the first aspect, the wall thickness d1 of the first protective member is 0.5 mm or greater.

[0022] In the above technical proposal, by setting the wall thickness d1 of the first protective member within the above range, the protective effect of the first protective member can be further improved.

[0023] In some embodiments of the first aspect, the battery cell further includes an insulating member for insulating the electrode terminal and the first wall, the insulating member having a convex portion protruding from a surface of the electrode terminal away from the first wall, the convex portion being arranged as a first protective member.

[0024] In some embodiments of the first aspect, the protrusion and the insulating member are of a unitary structure.

[0025] In the above technical solution, the insulating member is provided with a protrusion functioning as a first protective member, and the insulating member is integrally formed with the protrusion through a stamping process, so that the protrusion and the insulating member are integrated into one structure. On the one hand, the protrusion of this embodiment can be easily applied to the design of the conventional insulating member, and there is no need to make too many changes to the design of the conventional insulating member; on the other hand, the insulating member forms the protrusion through a stamping process, so the manufacturing process is simple and the protrusion can be formed without adding other materials.

[0026] In some embodiments of the first aspect, a through hole is provided in the insulating member, and the detection assembly is connected to the electrode terminal via the through hole.

[0027] In the above technical solution, the detection assembly passes through the through hole and is connected to the electrode terminal located inside the insulating member through the through hole, and the connection part between the detection assembly and the electrode terminal is located inside the insulating member, thereby reducing the risk of the connection part between the detection member and the electrode terminal being exposed to the external environment and damaged.

[0028] In some embodiments of the first aspect, the first wall has an inlet hole, and the protective assembly includes a second protective member protruding from a surface of the first wall facing away from the storage chamber and disposed around the inlet hole.

[0029] In the above technical solution, a second protective member is provided around the injection hole, which can reduce the risk of damage to the detection assembly caused by electrolyte overflow and further improve the protective effect of the protection assembly.

[0030] In some embodiments of the first aspect, the dimension h3 of the second protective member along the thickness of the first wall is 1 mm or greater.

[0031] In the above technical proposal, by setting the dimension h3 of the second protective member within the above range, the protective effect of the second protective member can be further improved.

[0032] In some embodiments of the first aspect, the second protective member includes a blocking portion and an adsorbing portion, and the adsorbing portion is provided on a side of the blocking portion opposite the injection hole.

[0033] In the above technical solution, the second protective member includes a blocking portion and an adsorption portion provided on the side opposite the injection hole of the blocking portion, the blocking portion reduces overflow of electrolyte, and the adsorption portion can further adsorb the scattered electrolyte in a small number of cases, further enhancing the protective effect of the second protective member.

[0034] In some embodiments of the first aspect, the suction portions are distributed around the circumference of the blocking portion.

[0035] In the above technical solution, the suction parts are distributed in a segment ring along the circumferential direction of the blocking part, so that the electrolyte that has been scattered can be adsorbed in a small number of cases with a small amount of material, and the cost can be effectively reduced. The suction parts are distributed in a ring shape along the circumferential direction of the blocking part, and are provided in the entire circumferential direction of the blocking part, so that the suction range of the suction parts can be expanded, and the suction effect of the suction parts can be effectively improved.

[0036] In some embodiments of the first aspect, the second protective member and the first wall are of unitary construction.

[0037] In the above technical solution, on the one hand, there is no need to make too many changes to the housing design of the traditional battery cell; on the other hand, the first wall forms the second protective member through a stamping process, the manufacturing process is simple, and the second protective member can be formed without adding other materials.

[0038] In some embodiments of the first aspect, the housing includes a shell and an end cover, the shell having an opening, the end cover adapted to cover the opening, and the end cover disposed as a first wall of the housing.

[0039] In some embodiments of the first aspect, the material of the protective assembly is an insulating material.

[0040] In the above technical solution, the protective assembly is made of insulating and heat-insulating material, which can reduce the impact of heat generated during the use of the battery cell on the protective assembly, improve the service life of the protective assembly, and avoid the interference caused by the contact between the protective assembly and the detection assembly, which can further affect the normal use of the detection assembly.

[0041] In certain embodiments of the first aspect, the detection assembly includes a sensing member and a connecting member connected to one another, the connecting member being configured to transmit an electrical signal to the sensing member.

[0042] In some embodiments of the first aspect, the connection member includes an optical fiber, which can improve signal transmission speed.

[0043] In a second aspect, embodiments of the present application provide a battery comprising a battery cell according to any embodiment of the second aspect.

[0044] In a third aspect, embodiments of the present application provide a power consuming device including a battery cell according to any embodiment of the second aspect for supplying electrical energy.

[0045] The above description is only an outline of the technical solution of the present application, which can be implemented according to the contents of the specification in order to more clearly understand the technical means of the present application. In addition, in order to make the above and other objectives, features and advantages of the present application more comprehensible, the following provides examples of specific embodiments of the present application. [Brief description of the drawings]

[0046] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not intended to be limiting of the present application. In the drawings, like numerals refer to like elements throughout. [Figure 1] 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application. [Diagram 2] FIG. 2 is a schematic disassembly diagram of a battery according to some embodiments of the present application. [Diagram 3] FIG. 3 is a structural schematic diagram of the battery module shown in FIG. 2. [Figure 4] FIG. 2 is an exploded schematic diagram of a battery cell according to some embodiments of the present application. [Diagram 5] 2 is a structural schematic diagram of a first wall of a battery cell according to some embodiments of the present application. FIG. [Figure 6] 2 is a partially enlarged schematic diagram of the structure of an electrode terminal of a battery cell according to some embodiments of the present application. FIG. [Figure 7] FIG. 2 is a partially enlarged schematic diagram of the structure of another battery cell-like electrode terminal according to some embodiments of the present application. [Figure 8] FIG. 13 is a partially enlarged schematic diagram of an electrode terminal of still another battery cell according to some embodiments of the present application. [Figure 9] FIG. 13 is a partially enlarged schematic diagram of an electrode terminal of another battery cell according to some embodiments of the present application. [Figure 10] FIG. 13 is a partially enlarged schematic diagram of an electrode terminal of another battery cell according to some embodiments of the present application. [Figure 11] FIG. 2 is a structural schematic diagram of a first wall of another battery cell according to some embodiments of the present application. [Figure 12] 2 is a partially enlarged schematic structural view of an insulating member of a battery cell according to some embodiments of the present application. FIG. [Figure 13] FIG. 13 is a structural schematic diagram of a first wall of yet another battery cell according to some embodiments of the present application. [Figure 14] 2 is a partially enlarged schematic view of the structure of a second protective member of a battery cell according to some embodiments of the present application. FIG. [Figure 15] FIG. 13 is a structural schematic diagram of a first wall of another battery cell according to some embodiments of the present application. [Figure 16] FIG. 13 is a structural schematic diagram of a first wall of another battery cell according to some embodiments of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0047] The following detailed description will be given of the embodiments of the technical solution of the present application with reference to the drawings. The following embodiments are only used to more clearly explain the technical solution of the present application, and are merely illustrative and do not limit the scope of protection of the present application.

[0048] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are explicitly described below with reference to the drawings of the embodiments of the present application, but it is clear that the described embodiments are only a part of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments of the present application, other embodiments obtained by those skilled in the art without paying creative efforts all belong to the protection scope of the present application.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art. The terms used in this application are used only to describe certain embodiments and are not intended to limit this application. The terms "include" and "have" and variations thereof in this application's specification, claims, and above description of the drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in this application's specification, claims, and above drawings are intended to distinguish different objects, and are not intended to describe a specific order or primary and secondary relationships.

[0050] When an "embodiment" is described in this application, it means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of the application. The occurrences of such phrases in various places in the specification do not necessarily refer to the same embodiment, or to separate or alternative embodiments that are mutually exclusive of other embodiments.

[0051] In the description of this application, unless otherwise clearly specified and limited, the terms "attach", "connect", "connection" and "attached connection" should be understood in a broad sense, and may be, for example, a fixed connection, a detachable connection, or an integral connection, or may be a direct connection, an indirect connection via an intermediate medium, or an internal communication between two components. For those skilled in the art, the specific meaning of the above terms in this application may be understood according to the specific situation.

[0052] The term "and / or" in this application merely describes the relation between related objects, and means that there are three relations, for example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the sign " / " in this application generally represents that the related objects before and after it are in an "or" relation.

[0053] In the embodiments of the present application, the same reference numerals represent the same elements, and detailed descriptions of the same elements in different embodiments are omitted for brevity. It should be understood that the dimensions of the various elements in the embodiments of the present application shown in the drawings, such as thickness, length, width, etc., and the dimensions of the entire integrated device, such as thickness, length, width, etc., are merely exemplary, and the present application should not be construed as any limitation.

[0054] As used herein, "plurality" means two or more (including two).

[0055] In this application, the term "parallel" includes not only absolutely parallel but also approximately parallel as generally accepted in engineering, and the term "perpendicular" includes not only absolutely perpendicular but also approximately perpendicular as generally accepted in engineering.

[0056] At present, due to the development of market conditions, the application of power batteries is becoming more and more widespread. Power batteries are not only applicable to energy storage power systems such as hydroelectric power generation, thermal power generation, wind power generation, and solar power stations, but also widely applied to electric transportation such as electric bicycles, electric motorcycles, and electric cars, as well as various fields such as military equipment and aerospace. With the continuous expansion of the application fields of power batteries, the market demand for them is also expanding.

[0057] In the present application, the battery cell may include a lithium ion secondary battery cell, a lithium ion primary battery cell, a lithium sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, or a magnesium ion battery cell, etc., and the embodiments of the present application are not limited thereto. The battery cell may be a cylinder, a flat body, a rectangular parallelepiped, or other shape, and the embodiments of the present application are not limited thereto.

[0058] A battery as referred to in the embodiments of this application refers to a single physical module that includes one or more battery cells to provide higher voltage and capacity. For example, a battery as referred to in this application may include a battery module or a battery pack. A battery usually includes a case for sealing one or more battery cells. The case prevents liquids and other foreign objects from affecting the charging or discharging of the battery cells.

[0059] The battery cell includes an electrode assembly and an electrolyte, and the electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The battery cell is mainly operated by the movement of metal ions between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer, and the positive electrode active material layer is applied to the surface of the positive electrode collector, and the current collector without the positive electrode active material layer protrudes from the current collector with the positive electrode active material layer applied, and the current collector without the positive electrode active material layer is stacked to form a positive electrode tab. For example, in a lithium-ion battery, the material of the positive electrode collector may be aluminum, and the positive electrode active material may be lithium cobalt oxide, lithium iron phosphate, ternary lithium, lithium manganate, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is applied to the surface of the negative electrode current collector, the current collector on which the negative electrode active material layer is not applied protrudes from the current collector on which the negative electrode active material layer is applied, and the current collectors on which the negative electrode active material layer is not applied are stacked to form a negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon. The material of the separator may be PP or PE. In addition, the electrode assembly may have a wound structure or a stacked structure, and the embodiment of the present application is not limited thereto.

[0060] The battery cell further includes a housing, the housing including a shell, an end cover, electrode terminals, an insulating member, and an inlet hole. The shell has an opening, and the end cover is fitted over the opening to form a sealed space for receiving the electrode assembly and the electrolyte. After the end cover is connected to the shell, the electrolyte can be injected into the battery cell through the inlet hole of the end cover. The insulating member is fitted to the electrode terminal to prevent the electrode terminal from being short-circuited.

[0061] The inventors of the present application note that currently, conventional battery cells are not provided with a detection assembly, and therefore the working state of the battery cell cannot be detected in real time, including but not limited to relevant data such as voltage, temperature, etc. In addition, currently, conventional battery cells are also not provided with a protection assembly to protect the detection assembly.

[0062] In order to solve the problem of being unable to detect the working state of the battery cell in real time, the inventors of the present application have conducted research and found that the working state of the battery cell can be detected in real time by providing a detection assembly. The detection assembly can control the working state of the battery cell in real time, and can provide a quick early warning of abnormal parameters during the operation of the battery cell, so that the corresponding safety mechanism or staff can respond in a timely manner, further improving the safety and reliability of the battery cell. In addition, the risk of the detection assembly being damaged during the use of the battery cell can be reduced by providing a protection assembly to protect the detection assembly.

[0063] Based on the above considerations, the inventors have conducted extensive research and have designed a battery cell, and by providing the battery cell with a detection assembly and a protection assembly for protecting the detection assembly, the operating state of the battery cell can be controlled in real time, and the risk of damage to the detection assembly during the use of the battery cell can be reduced.

[0064] The technical solutions described in the embodiments of the present application are applicable to battery cells, batteries, and power consuming devices that use batteries.

[0065] The power consuming device may be a vehicle, a mobile phone, a portable device, a laptop, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gasoline vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. The spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc. The electric toy may include a game console, an electric car toy, an electric ship toy, an electric plane toy, or other stationary or mobile electric toy. The electric tool may include an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a metal cutting power tool such as a concrete vibrator, a planer, a grinding power tool, an assembly power tool, and a railway power tool. The embodiment of the present application does not particularly limit the above power consuming device.

[0066] It should be understood that the technical solutions described in the embodiments of the present application are not limited to the batteries and power consuming devices described above, but can be applied to all batteries and power consuming devices using batteries, including boxes. For the sake of simplicity, the following embodiments are all described using an electric vehicle as an example.

[0067] FIG. 1 is a structural schematic diagram of a vehicle according to some embodiments of the present application.

[0068] 1, a battery 2 is provided inside the vehicle 1, and the battery 2 may be provided at the bottom, head, or tail of the vehicle 1. The battery 2 can be used to power the vehicle 1, for example, the battery 2 can function as an operating power source for the vehicle 1.

[0069] The vehicle 1 may further include a controller 3 and a motor 4, where the controller 3 is used to control the battery 2 to power the motor 4, for example for electrical needs of starting, navigating and operating while driving the vehicle 1.

[0070] In some embodiments of the present application, the battery 2 may not only serve as the operating power source for the vehicle 1, but may also serve as the propulsion power source for the vehicle 1, providing propulsion power to the vehicle 1 in place of or in part in place of fuel oil or natural gas.

[0071] FIG. 2 is a schematic disassembled view of a battery according to some embodiments of the present application.

[0072] As shown in FIG. 2, the battery 2 includes a case 5 and a battery cell, and the battery cell is housed in the case 5.

[0073] The box 5 is used to store the battery cells, and the box 5 may have various structures. In some embodiments, the box 5 may include a first box part 5a and a second box part 5b, and the first box part 5a and the second box part 5b are fitted together, and a storage space 5c for storing the battery cells is defined by both the first box part 5a and the second box part 5b. The second box part 5b may be a hollow structure with one end open, and the first box part 5a may be a plate-like structure, and the first box part 5a is fitted to the open side of the second box part 5b to form the box 5 having the storage space 5c, and the first box part 5a and the second box part 5b may also be hollow structures with one end open, and the open side of the first box part 5a is fitted to the open side of the second box part 5b to form the box 5 having the storage space 5c. Of course, the first box portion 5a and the second box portion 5b may have various shapes, such as a cylindrical body or a rectangular parallelepiped.

[0074] In order to improve the sealing performance between the first box body portion 5a and the second box body portion 5b after connection, a sealing member such as a sealant or a seal ring may be provided between the first box body portion 5a and the second box body portion 5b.

[0075] When the first box body part 5a is fitted to the top of the second box body part 5b, the first box body part 5a may be called an upper box cover and the second box body part 5b may be called a lower box.

[0076] The battery 2 may have one or more battery cells. When there are multiple battery cells, the multiple battery cells may be connected in series, parallel, or series-parallel, and a series-parallel connection means that some of the multiple battery cells are connected in series and some are connected in parallel. The multiple battery cells may be directly connected in series, parallel, or series-parallel, and then the multiple battery cells may be integrated and stored in the box 5. Of course, the multiple battery cells may be connected in series, parallel, or series-parallel to form a battery module 6, and then the multiple battery modules 6 may be connected in series, parallel, or series-parallel to form an integrated battery module, and stored in the box 5.

[0077] FIG. 3 is a structural schematic diagram of the battery module shown in FIG.

[0078] 3, there are a plurality of battery cells 7, and the plurality of battery cells 7 are connected in series, in parallel, or in series / parallel to form a battery module 6. The plurality of battery modules 6 are connected in series, in parallel, or in series / parallel, and then integrated and stored in a box.

[0079] The plurality of battery cells 7 in the battery module 6 can be electrically connected to each other through a bus member, thereby realizing a parallel connection, a series connection, or a series-parallel connection of the plurality of battery cells 7 in the battery module 6.

[0080] FIG. 4 is a schematic disassembled view of a battery cell according to some embodiments of the present application.

[0081] 4, a battery cell 7 according to an embodiment of the present application includes an electrode assembly 10 and a housing 20, and the electrode assembly 10 is housed in the housing 20. The housing 20 can also be used to house an electrolyte, such as an electrolyte solution.

[0082] In some embodiments, the housing 20 includes a first wall 30, and the housing 20 may have various shapes, such as a cylinder, a rectangular parallelepiped, etc. The shape of the housing 20 can be determined according to the specific shape of the electrode assembly 10. For example, if the electrode assembly 10 has a cylindrical structure, a cylindrical shell can be selected, and if the electrode assembly 10 has a rectangular parallelepiped structure, a rectangular parallelepiped shell can be selected.

[0083] In the battery cell 7, there may be one, two or more electrode assemblies 10 housed in the housing 20. For example, in FIG.

[0084] FIG. 5 is a structural schematic diagram of a first wall of a battery cell according to some embodiments of the present application, and FIG. 6 is a partially enlarged structural schematic diagram of an electrode terminal of a battery cell according to some embodiments of the present application.

[0085] As shown in Figures 4 to 6, an embodiment of the present application provides a battery cell 7, which includes a housing 20, an electrode assembly 10, a detection assembly 40 and a protection assembly 50, in which the housing 20 has a storage chamber, the electrode assembly 10 is accommodated in the storage chamber, the detection assembly 40 is connected to the housing 20 and is used to detect the working state of the battery cell 7, and the protection assembly 50 protrudes from the housing 20 and is provided on the same side as the detection assembly 40 so as to protect the detection assembly 40.

[0086] Alternatively, the detection assembly 40 may be provided on the side of the housing 20 away from the storage chamber, or on the side of the housing 20 toward the storage chamber. By providing the detection assembly 40 on the side of the housing 20 away from the storage chamber, the occupation of the internal space of the battery cell 7 by the detection assembly 40 can be reduced, and by providing the detection assembly 40 on the side of the housing 20 toward the storage chamber, the overall volume of the battery cell 7 can be reduced. The detection assembly 40 can detect the working state of the battery cell 7 in real time, where the working state of the battery cell 7 includes, but is not limited to, related data such as voltage, temperature, etc. By providing the detection assembly 40 on the battery cell 7, the working state of the battery cell 7 can be easily controlled in real time, and the abnormal parameters during the operation of the battery cell 7 can be quickly and early warned, so that the corresponding safety mechanism or staff can respond in a timely manner, and further the safety and reliability of the battery cell 7 can be improved.

[0087] In some embodiments, the housing 20 includes a first wall 30, and the detection assembly 40 is connected to the first wall 30. Here, the first wall 30 may be any one of the walls forming the housing 20 of the battery cell 7, and the means for connecting the detection assembly 40 and the first wall 30 may be, but is not limited to, welding, engaging, or gluing.

[0088] The protection assembly 50 is used to protect the detection assembly 40, and can reduce the risk of the detection assembly 40 being damaged during the use of the battery cells 7, such as during formation or electrolyte injection.

[0089] In the embodiment of the present application, the concept of the present invention will be described by taking as an example a case where the detection assembly 40 is provided on the side of the first wall 30 that is remote from the storage chamber. The protection assembly 50 is provided on the same side as the detection assembly 40, i.e., the protection assembly 50 is also provided on the surface of the end cover that is remote from the electrode assembly. The protection assembly 50 protrudes from the housing 20, i.e., in the thickness direction of the first wall 30, the protection assembly 50 is formed to protrude from the surface of the first wall 30 that is remote from the storage chamber. In this way, it is possible to reduce the occupation of the internal space of the battery cell 7 by the detection assembly 40 and the protection assembly 50, and to facilitate the installation and replacement of the detection assembly 40 and the protection assembly 50.

[0090] By providing the protection assembly 50 for protecting the detection assembly 40, the risk of the detection assembly 40 being damaged during use of the battery cell 7 can be reduced.

[0091] In some embodiments, the housing 20 includes an electrode terminal 31 that protrudes from a surface of the first wall 30 facing away from the storage chamber, the electrode terminal 31 is electrically connected to a tab on the electrode assembly 10, and the detection assembly 40 is electrically connected to the electrode terminal 31 and a connection portion 41 is formed on the electrode terminal 31.

[0092] In the embodiment of the present application, the connection means between the electrode terminal 31 and the first wall 30 may be, but is not limited to, welding, riveting, or adhesion. The connection means between the detection assembly 40 and the first wall 30 may be, but is not limited to, welding, engagement, or adhesion. The detection assembly 40 is electrically connected to the electrode terminal 31, and can detect relevant data such as the voltage, temperature, etc. of the electrode terminal 31 of the battery cell 7, so that the working state of the battery cell 7 can be easily controlled in real time, and the abnormal parameters during the operation of the battery cell 7 can be quickly and early warned, so that the corresponding safety mechanism or staff can respond in a timely manner, and further improve the safety and reliability of the battery cell 7.

[0093] In the embodiment of the present application, the concept of the present invention will be described by taking as an example a case where the detection assembly 40 is provided on the side of the first wall 30 facing away from the storage chamber. The electrode terminal 31 protrudes from the surface of the first wall 30 facing away from the storage chamber, and the part of the electrode terminal 31 protruding from the surface of the first wall 30 facing away from the storage chamber is located on the same side of the detection assembly 40 and the first wall 30, which makes it easy to electrically connect the detection assembly 40 and the electrode terminal 31 and to form a connection part 41 on the electrode terminal 31. Here, the connection part 41 is a connection position between the electrode terminal 31 and the detection assembly 40.

[0094] In some embodiments, the protective assembly 50 includes a first protective member 51 that protrudes from a surface of the electrode terminal 31 facing away from the first wall 30, and the first protective member 51 is used to separate the surface of the electrode terminal 31 facing away from the first wall 30 from the connection portion 41.

[0095] When the assembly is completed, the battery cell 7 has no power and needs to be activated by charging. The process of initially charging the battery cell 7 is called formation, which is used to activate the active material in the battery cell 7. During the formation process of the battery cell 7, the formation nail is inserted and connected to the central region of the electrode terminal 31 to perform the formation operation. During this process, if there is any misalignment in the insertion connection of the formation nail, it is likely to come into contact with the detection assembly 40, and even cause damage to the detection assembly 40.

[0096] For example, in the embodiment of the present application, the concept of the present invention will be described by taking as an example a case where the detection assembly 40 is provided on the side of the first wall 30 facing away from the storage chamber. The electrode terminal 31 protrudes from the surface of the first wall 30 facing away from the storage chamber, and the part of the electrode terminal 31 protruding from the surface of the first wall 30 facing away from the storage chamber is located on the same side of the detection assembly 40 and the first wall 30, which makes it easy to electrically connect the detection assembly 40 and the electrode terminal 31 and to form a connection part 41 in the electrode terminal 31. Here, the connection part 41 is a connection position between the electrode terminal 31 and the detection assembly 40.

[0097] The first protective member 51 is provided to protrude from the surface of the electrode terminal 31 facing away from the end cover, and the first protective member 51 separates the connection portion 41 from the central region of the surface of the electrode terminal 31 facing away from the first wall 30.

[0098] A first protective member 51 is provided on the surface of the electrode terminal 31 facing away from the first wall 30, and by separating the connection portion 41 from the central region of the surface of the electrode terminal 31 facing away from the first wall 30, the risk of damage to the detection assembly 40 during the chemical formation process of the battery cell 7 can be reduced.

[0099] FIG. 7 is a partially enlarged schematic view of an electrode terminal of another battery cell according to some embodiments of the present application, and FIG. 8 is a partially enlarged schematic view of an electrode terminal of yet another battery cell according to some embodiments of the present application.

[0100] As shown in FIGS. 5 to 8, in some embodiments, the first protective members 51 are distributed in a segment ring or in a ring shape along the circumferential direction of the electrode terminal 31.

[0101] The first protective members 51 are distributed in segment rings along the circumferential direction of the electrode terminal 31, and protective walls are formed in the segment rings, which separate the surface of the electrode terminal 31 away from the first wall 30 from the connection portion 41. The first protective members 51 are provided in a structure in which they are distributed in segment rings along the circumferential direction of the electrode terminal 31, thereby more clearly protecting the connection portion 41. Protection of the detection assembly 40 can be achieved with less material, and costs can be effectively reduced.

[0102] The first protective member 51 is provided in a ring-shaped structure distributed around the circumferential direction of the electrode terminal 31, and a protective wall is formed all around the electrode terminal 31, thereby isolating the entire central region of the electrode terminal 31, maximizing the protective range of the first protective member 51 and effectively improving the protective effect of the first protective member 51 on the detection assembly 40.

[0103] FIG. 9 is a partially enlarged schematic view of an electrode terminal of another battery cell according to some embodiments of the present application.

[0104] As shown in Figures 5 to 9, in some embodiments, the first protective member 51 includes a main body portion 51a and a retreat portion 51b, and the retreat portion 51b is recessed from the main body portion 51a in the direction toward the center point of the electrode terminal 31 so as to retreat the connection portion 41.

[0105] Specifically, the main body 51a of the first protective member 51 is a segment ring or a ring-shaped structure along the circumferential direction of the electrode terminal 31. The retracted portion 51b of the first protective member 51 is provided corresponding to the connection portion 41. The retracted portion 51b of the first protective member 51 is used to retract the connection portion 41, thereby allowing the main body 51a of the first protective member 51 to be provided closer to the edge of the electrode terminal 31. The closer the main body 51a of the first protective member 51 is to the edge of the electrode terminal 31, the larger the area of ​​the central region of the electrode terminal 31 left for inserting and connecting the chemical nail becomes, and the influence of the first protective member 51 on the insertion connection between the chemical nail and the electrode terminal 31 can be effectively reduced. In addition, since the retreat portion 51b is formed recessed from the main body portion 51a in the direction toward the center point of the electrode terminal 31, the protective area formed by the first protective member 51 close to the connection portion 41 in the direction from the edge of the electrode terminal 31 to the center point of the electrode terminal 31 is larger, thereby further enhancing the protective effect of the first protective member 51 on the detection assembly 40.

[0106] The retreat portion 51b of the first protective member 51 not only positions the main body portion 51a of the first protective member 51 closer to the edge of the electrode terminal 31, effectively reducing the effect of the first protective member 51 on the plug-in connection between the chemical nail and the electrode terminal 31, but also makes it possible to enlarge the protective area formed by the first protective member 51 in the portion close to the connection portion 41, thereby further enhancing the protective effect of the first protective member 51 on the detection assembly 40.

[0107] FIG. 10 is a partially enlarged schematic view of an electrode terminal of another battery cell according to some embodiments of the present application.

[0108] As shown in FIGS. 5 to 10, in some embodiments, along the thickness direction of the first wall 30, the first protective member 51 has a dimension h1, the connection portion 41 has a dimension h2, and h1>h2.

[0109] As described above, the first protective member 51 protrudes from the surface of the electrode terminal 31 away from the end cover, thereby separating the connection portion 41 from the central region of the electrode terminal 31. In the thickness direction of the first wall 30, the dimension h1 of the first protective member 51 is the height of the protrusion of the first protective member 51, and the dimension h2 of the connection portion 41 is the height of the protrusion of the connection portion 41 on the surface of the electrode terminal 31 away from the first wall 30. If the dimension h1 of the first protective member 51 is smaller than the dimension h2 of the connection portion 41 along the thickness direction of the first wall 30, there is a risk that the connection portion 41 will be damaged by a chemical forming nail during the chemical forming process of the battery cell 7.

[0110] In this way, by providing the first protective member 51 such that the dimension h1 is greater than the dimension h2 of the connection portion 41 along the thickness direction of the first wall 30, the first protective member 51 can sufficiently separate the connection portion 41 from the central region of the electrode terminal 31. This reduces the risk that the chemical nail will come into contact with the connection portion 41 and cause further damage to the connection portion 41 when a misalignment occurs in the insertion connection of the chemical nail during the chemical formation process of the battery cell 7. This further enhances the protective effect of the first protective member 51 on the detection assembly 40.

[0111] In some embodiments, h1 and h2 satisfy the relationship h1-h2≧1 mm.

[0112] In the above technical proposal, the protective effect of the first protective member 51 can be further improved by setting the relationship between the dimension h1 of the first protective member 51 and the dimension h2 of the connection portion 41 within the above range along the thickness direction of the first wall 30.

[0113] For example, the value of h1-h2 may be, but is not limited to, 1 mm, 1.5 mm, 2 mm, or 3 mm.

[0114] With continued reference to FIG. 9, in some embodiments, the wall thickness d1 of the first protective member 51 is greater than or equal to 0.5 mm.

[0115] The wall thickness of the first protective member 51 can be understood as the thickness of the first protective member 51 along the direction from the edge of the electrode terminal 31 to the center point of the electrode terminal 31, and by setting the wall thickness d1 of the first protective member 51 within the above range, the protective effect of the first protective member 51 can be further improved.

[0116] For example, the wall thickness d1 of the first protective member 51 may be, but is not limited to, 0.5 mm, 1 mm, 2 mm, or 3 mm.

[0117] FIG. 11 is a structural schematic diagram of a first wall of another battery cell according to some embodiments of the present application.

[0118] As shown in FIG. 11 , in some embodiments, the battery cell further includes an insulating member 32 for insulating the electrode terminal 31 from the first wall 30, and the insulating member 32 has a convex portion protruding from the surface of the electrode terminal 31 away from the first wall 30, and the convex portion is configured as a first protective member 51.

[0119] The installation position of the insulating member 32 is not limited. For example, the insulating member 32 may be provided on the side of the first wall 30 that faces away from the storage chamber, the insulating member 32 may be provided on the side of the first wall 30 that faces toward the storage chamber, or the insulating member 32 may be provided not only on the side of the first wall 30 that faces away from the storage chamber, but also on the side of the first wall 30 that faces toward the storage chamber.

[0120] For example, in the embodiment of the present application, the concept of the present invention will be described by taking as an example the insulating member 32 provided on the side of the first wall 30 facing away from the storage chamber. The insulating member 32 is provided on the portion of the electrode terminal 31 protruding from the surface of the first wall 30 facing away from the storage chamber, the insulating member 32 and the electrode terminal 31 abut against each other, and the insulating member 32 is used to insulate the electrode terminal 31 from the first wall 30. The detection assembly 40 is provided on the surface of the first wall 30 facing away from the storage chamber.

[0121] The insulating member 32 has a convex portion protruding from the surface of the electrode terminal 31 facing away from the first wall 30, and the convex portion is arranged as a first protective member 51 and separates the connection portion from the central region of the surface of the electrode terminal 31 facing away from the first wall 30.

[0122] The insulating member 32 is provided with a protrusion functioning as the first protective member 51, and the insulating member 32 is integrally formed with the protrusion by a stamping process, thereby forming an integral structure of the protrusion and the insulating member 32. On the one hand, the protrusion of this embodiment can be easily applied to the design of the conventional insulating member 32, and there is no need to make too many changes to the design of the conventional insulating member 32, and on the other hand, the insulating member 32 forms the protrusion by a stamping process, which simplifies the manufacturing process and allows the protrusion to be formed without adding any other materials.

[0123] FIG. 12 is a partially enlarged schematic view of the structure of an insulating member of a battery cell according to some embodiments of the present application.

[0124] As shown in FIGS. 11 and 12, in some embodiments, a through hole 321 is provided in the insulating member 32, and the detection assembly 40 is connected to the electrode terminal 31 via the through hole 321.

[0125] Specifically, a through hole 321 is provided on the insulating member 32 on a side closer to the detection member, and the detection member passes through the through hole 321 and is electrically connected to an electrode terminal 31 located inside the insulating member 32 .

[0126] In the above technical solution, the detection assembly 40 passes through the through hole 321 and is connected to the electrode terminal 31 located inside the insulating member 32, and the connection part 41 between the detection assembly 40 and the electrode terminal 31 is located inside the insulating member 32, thereby reducing the risk of the connection part 41 between the detection member and the electrode terminal 31 being exposed to the external environment and damaged.

[0127] FIG. 13 is a structural schematic diagram of a first wall of yet another battery cell according to some embodiments of the present application.

[0128] As shown in FIG. 13 , in some embodiments, the first wall 30 has an inlet hole 33, and the protective assembly 50 includes a second protective member 52 that protrudes from the surface of the first wall 30 facing away from the storage chamber and is disposed around the inlet hole 33.

[0129] The injection hole 33 is provided through the first wall 30, so that the operating staff can inject the electrolyte into the battery cell 7 through the injection hole 33. During the process of injecting the electrolyte into the battery cell 7, the electrolyte may overflow out of the injection hole 33 and further pass through the surface of the first wall 30 and flow into the detection assembly 40, which is likely to cause damage to the detection assembly 40.

[0130] In the embodiment of the present application, the concept of the present invention is described by taking as an example the detection assembly 40 provided on the side of the first wall 30 that is away from the storage chamber. The second protective member 52 protrudes from the surface of the first wall 30 that is away from the storage chamber, and the boss has a certain height along the thickness direction of the first wall 30. The detection assembly 40 and the second protective member 52 are located on the same side of the first wall 30. The second protective member 52 is provided around the liquid injection hole 33, thereby forming a boss structure around the liquid injection hole 33. The orthogonal projection of the second protective member 52 along the thickness direction of the first wall 30 may be a circle, a square, a triangle, etc., and the present application does not limit the shape of the orthogonal projection of the second protective member 52 along the thickness direction of the first wall 30, and may be selected according to actual circumstances. When the operating staff injects the electrolyte into the battery cell 7 through the liquid injection hole 33, the second protective member 52 can reduce the risk of the electrolyte overflowing.

[0131] By providing the second protective member 52 around the liquid inlet 33, the risk of damage to the detection assembly 40 due to overflow of the electrolyte can be reduced, and the protective effect of the protection assembly 50 can be further improved.

[0132] FIG. 14 is a partially enlarged schematic view of the structure of a second protective member of a battery cell according to some embodiments of the present application.

[0133] As shown in FIG. 14, in some embodiments, the dimension h3 of the second protective member 52 along the thickness direction of the first wall 30 is 1 mm or greater.

[0134] The dimension of the second protective member 52 along the thickness direction of the first wall 30 can be understood as the height of the protrusion of the second protective member 52 protruding from the surface of the first wall 30 on the side facing away from the storage chamber. By setting the dimension h3 of the second protective member 52 within the above range, the protective effect of the second protective member 52 can be further improved.

[0135] For example, the dimension h3 of the second protective member 52 along the thickness direction of the first wall 30 may be, but is not limited to, 1.0 mm, 1.5 mm, 2.0 mm, or 3 mm.

[0136] FIG. 15 is a structural schematic diagram of a first wall of another battery cell according to some embodiments of the present application.

[0137] As shown in FIG. 15, in some embodiments, the second protective member 52 includes a blocking portion 52a and an adsorbing portion 52b, and the adsorbing portion 52b is provided on the side of the blocking portion 52a opposite to the liquid injection hole 33.

[0138] Optionally, the blocking portion 52a protrudes from the surface of the first wall 30 away from the storage chamber and surrounds the liquid inlet 33. The suction portion 52b may be made of a material having a liquid absorbing function, such as polyurethanes, acrylics, etc., but is not limited thereto. The orthogonal projection of the suction portion 52b along the thickness direction of the first wall 30 may be a circle, a square, a triangle, etc., and the present application does not limit the shape of the orthogonal projection of the suction portion 52b along the thickness direction of the first wall 30, and it may be selected according to actual circumstances.

[0139] When an operating staff injects electrolyte into battery cell 7 through injection hole 33, even if the protrusion blocks the electrolyte to some extent, there is a risk that the electrolyte will splash out from blocking part 52a. Adsorption part 52b is provided on the side of blocking part 52a opposite injection hole 33, and if electrolyte splashes out from blocking part 52a, adsorption part 52b can adsorb the splashed electrolyte.

[0140] In the above technical solution, the second protective member 52 includes a blocking portion 52a and an adsorption portion 52b provided on the side of the blocking portion 52a opposite the injection hole 33, and the blocking portion 52a can reduce the overflow of the electrolyte, and the adsorption portion 52b can further adsorb the electrolyte that has splashed in a small number of cases, thereby further enhancing the protective effect of the second protective member 52.

[0141] In some embodiments, the suction portions 52b are distributed around the circumference of the blocking portion 52a.

[0142] For example, by distributing the adsorption portions 52b in a segment ring along the circumferential direction of the blocking portion 52a, it is possible to adsorb the electrolyte that has scattered in a small number of cases with a small amount of material, and it is possible to effectively reduce costs. The adsorption portions 52b are distributed in a ring shape along the circumferential direction of the blocking portion 52a, and by being provided around the entire circumferential direction of the blocking portion 52a, it is possible to expand the adsorption range of the adsorption portions 52b, and it is possible to effectively improve the adsorption effect of the adsorption portions 52b.

[0143] In some embodiments, the second protective member 52 and the first wall 30 are a unitary structure.

[0144] The first wall 30 is integrally formed with the second protective member 52 through a stamping process, so that the second protective member 52 and the first wall 30 have an integral structure. On the one hand, it does not need to make too many changes to the design of the housing 20 of the conventional battery cell 7, and on the other hand, the first wall 30 forms the second protective member 52 through a stamping process, so the manufacturing process is simple and the second protective member 52 can be formed without adding other materials.

[0145] In some embodiments, the housing 20 includes a shell and an end cover, the shell having an opening, the end cover adapted to cover the opening, and the end cover configured as the first wall 30 of the housing 20 .

[0146] The shell may have various shapes, such as a cylinder or a cuboid. The shape of the shell can be determined according to the specific shape of the electrode assembly. For example, if the electrode assembly has a cylindrical structure, a cylindrical shell can be selected, and if the electrode assembly has a cuboid structure, a cuboid shell can be selected.

[0147] The end cover may have various structures, for example, the end cover may be a plate-like structure, a hollow structure with one end open, etc. For example, the shell may have a rectangular parallelepiped structure, the end cover may be a plate-like structure, and the end cover may be fitted to the opening at the top of the shell. The end cover may be made of an insulating material (e.g., plastic) or a conductive material (e.g., metal).

[0148] In the embodiment of the present application, the first wall 30 may be an end cover. Optionally, the detection assembly 40 may be provided on the side of the end cover away from the storage chamber, or on the side of the end cover toward the storage chamber. The connection between the detection assembly 40 and the end cover may be, but is not limited to, welding, engagement, or adhesion.

[0149] In some embodiments, the material of the protective assembly 50 is an insulating material.

[0150] The battery cells 7 are continuously charged and discharged during use, and a lot of heat is generated during the charging and discharging process of the battery cells 7. The protection assembly 50 and the detection assembly 40 are easily in contact with each other. For example, the insulating and heat-insulating material may be polytetrafluoroethylene, polyphenylene sulfide, polyether ether ketone, polyphenylene ester, etc. The present application does not limit the specific material, and it may be selected according to the actual situation.

[0151] By manufacturing the protection assembly 50 using an insulating and heat-insulating material, it is possible to reduce the impact of heat generated during the use of the battery cells 7 on the protection assembly 50, thereby improving the service life of the protection assembly 50. In addition, it is possible to avoid interference caused by contact between the protection assembly 50 and the detection assembly 40, which would further affect normal use of the detection assembly 40.

[0152] FIG. 16 is a structural schematic diagram of a first wall of another battery cell according to some embodiments of the present application.

[0153] As shown in FIG. 16, in some embodiments, the detection assembly 40 includes a sensing member 42 and a connecting member 43 connected to each other, where the connecting member 43 is used to transmit an electrical signal to the sensing member 42 .

[0154] For example, the sensing member 42 is used to detect the working state of the battery cell, where the sensing member 42 includes, but is not limited to, a temperature sensing device, a pressure sensing device, etc. The connecting member 43 is used to transmit an electrical signal to the sensing member 42, where the sensing member 42 is electrically connected to the battery cell through the connecting member 43, where the connecting member 43 includes, but is not limited to, an optical fiber, and the use of the optical fiber as the connecting member 43 can improve the signal transmission speed.

[0155] In some embodiments of the present application, the present application further provides a battery including a battery cell according to the above technical solution.

[0156] In some embodiments of the present application, the present application further provides a power consuming device, including a battery cell according to the above technical solution for supplying electric energy.

[0157] In order to better understand the battery cell according to the embodiment of the present application, based on the same inventive concept, an embodiment of said battery cell put into practical use will now be illustrated and described.

[0158] An embodiment of the present application provides a battery cell 7, which includes a shell, an electrode assembly, an end cover, an electrode terminal 31, an insulating member 32, a detection assembly 40, a protection assembly 50, and an inlet hole 33. Here, the shell has an opening and a storage chamber, the electrode assembly is housed in the storage chamber, and the end cover is fitted to cover the opening of the shell.

[0159] The electrode terminal 31 protrudes from the surface of the end cover facing away from the receiving chamber, and is electrically connected to the tab of the electrode assembly. The insulating member 32 is used to insulate the electrode terminal 31 from the end cover.

[0160] The detection assembly 40 includes a sensing member 42 and a connecting member 43 connected to each other, the connecting member 43 is used to transmit an electrical signal to the sensing member 42, the detection assembly 40 is provided on the surface of the end cover facing away from the storage chamber, the detection assembly 40 is electrically connected to the electrode terminal 31, and a connection portion 41 is formed on the electrode terminal 31.

[0161] The protection assembly 50 includes a first protection member 51 and a second protection member 52. The first protection member 51 protrudes from the surface of the electrode terminal 31 on the side away from the end cover, and is used to separate the surface of the electrode terminal 31 on the side away from the end cover from the connection portion 41. The first protection member 51 is distributed in a segment ring or in a ring shape along the circumferential direction of the electrode terminal 31. The first protection member 51 includes a main body portion 51a and a retreat portion 51b, and the retreat portion 51b is formed by being recessed from the main body portion 51a toward the center point of the electrode terminal 31 so as to retreat the connection portion 41. Along the thickness direction of the end cover, the first protection member 51 has a dimension h1, and the connection portion 41 has a dimension h2, where h1-h2≧1 mm.

[0162] The end cover is provided with a liquid inlet 33, and the second protective member 52 protrudes from the surface of the end cover on the side facing away from the storage chamber and is provided around the liquid inlet 33. Along the thickness direction of the first wall 30, the dimension h3 of the second protective member 52 is 1 mm or more.

[0163] In the above technical solution, the detection assembly 40 can detect the working state of the battery cell 7 in real time, and the working state of the battery cell 7 includes, but is not limited to, relevant data such as voltage, temperature, etc. By providing the detection assembly 40 on the battery cell 7, the working state of the battery cell 7 can be easily controlled in real time, and early warning can be given for abnormal parameters during the operation of the battery cell 7, so that the corresponding safety mechanism or staff can respond in a timely manner, and the safety and reliability of the battery cell 7 can be further improved.

[0164] The protection assembly 50 is used to protect the detection assembly 40, and can reduce the risk of the detection assembly 40 being damaged during the use of the battery cells 7, such as during formation or electrolyte injection.

[0165] A first protective member 51 is provided on the surface of the electrode terminal 31 facing away from the first wall 30, and by separating the connection portion 41 from the central region of the surface of the electrode terminal 31 facing away from the first wall 30, the risk of damage to the detection assembly 40 during the chemical formation process of the battery cell 7 can be reduced.

[0166] By providing the second protective member 52 around the liquid inlet 33, the risk of damage to the detection assembly 40 due to overflow of the electrolyte can be reduced, and the protective effect of the protection assembly 50 can be further improved.

[0167] Furthermore, where no contradiction exists, the embodiments and features of the embodiments of the present application may be combined with each other.

[0168] It should be noted that the above embodiments are only used to explain the technical solution of the present application, and are not intended to limit the present application. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art can easily understand the present application. As can be understood, the technical solutions described in the above embodiments can still be modified or some or all of the technical features can be replaced equally, but these modifications or replacements do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of this application, and are all within the scope of the claims and the specification of this application. In particular, as long as there is no structural contradiction, the technical features mentioned in each embodiment may be arbitrarily combined. This application is not limited to the specific embodiments disclosed in the specification, but includes all technical solutions that fall within the scope of the claims. [Explanation of symbols]

[0169] 1 vehicle 2 batteries 3. Controller 4 Motor 5 box body 5a 1st box part 5b 2nd box part 5c Storage space 6 Battery Module 7 Battery Cells 10 Electrode Assembly 20. Housing 30 1st wall 31 Electrode terminal 32 Insulating materials 321 Through hole 33 Liquid injection hole 40 Detection Assembly 41 Connection 42 Sensing material 43 Connection parts 50 Protection Assembly 51 First protective member 51a Main body 51b Waiting area 52 Second protective member 52a Blocking part 52b Adsorption part

Claims

1. a housing having a storage chamber; an electrode assembly housed in the housing; a detection assembly connected to the housing for detecting an operating state of the battery cell; a protection assembly protruding from the housing and provided on the same side as the detection assembly so as to protect the detection assembly. A battery cell characterized by:

2. The housing includes a first wall; the detection assembly is connected to the first wall; The battery cell according to claim 1 .

3. the detection assembly is located on a side of the first wall away from the storage compartment; The battery cell according to claim 2 .

4. the housing includes an electrode terminal protruding from a surface of the first wall facing away from the storage chamber and electrically connected to a tab of the electrode assembly; the detection assembly is electrically connected to the electrode terminal and a connection is formed at the electrode terminal; The battery cell according to claim 3 .

5. the protection assembly includes a first protection member protruding from a surface of the electrode terminal away from the first wall and isolating the surface of the electrode terminal away from the first wall from the connection portion.

5. The battery cell according to claim 4.

6. The first protective member is distributed in a segment ring or in a ring shape along a circumferential direction of the electrode terminal. The battery cell according to claim 5 .

7. The first protective member includes a main body portion and a retreat portion, the retreat portion is formed by being recessed from the main body portion toward a center point of the electrode terminal so as to retreat the connection portion. The battery cell according to claim 5 .

8. Along a thickness direction of the first wall, the first protective member has a dimension h1, and the connection portion has a dimension h2, where h1>h2. The battery cell according to claim 5 .

9. The h1 and h2 satisfy the relationship of h1-h2≧1 mm. The battery cell according to claim 8 .

10. The wall thickness d1 of the first protective member is 0.5 mm or more. The battery cell according to claim 5 .

11. the battery cell further includes an insulating member for insulating the electrode terminal and the first wall, the insulating member has a protrusion protruding from a surface of the electrode terminal on a side away from the first wall, the protrusion being disposed as the first protective member; The battery cell according to claim 5 .

12. The protrusion and the insulating member are integrally molded. The battery cell according to claim 11 .

13. a through hole is provided in the insulating member, and the detection assembly is connected to the electrode terminal via the through hole; The battery cell according to claim 11 .

14. The first wall is provided with a liquid inlet; The protection assembly includes a second protection member protruding from a surface of the first wall away from the storage chamber and surrounding the liquid injection hole. The battery cell according to claim 3 .

15. Along the thickness direction of the first wall, the dimension h3 of the second protective member is 1 mm or more. The battery cell according to claim 14 .

16. the second protective member includes a blocking portion and an adsorption portion, The suction portion is provided on the side of the blocking portion opposite to the liquid injection hole. The battery cell according to claim 14 .

17. The adsorption portion is distributed around the circumferential direction of the blocking portion.

17. The battery cell according to claim 16.

18. The second protective member and the first wall are of a unitary molded structure. The battery cell according to claim 14 .

19. The housing includes a shell and an end cover, the shell having an opening, and the end cover is adapted to cover the opening. The end cover is disposed as a first wall of the housing. The battery cell according to claim 2 .

20. the material of the protective assembly is an insulating material; The battery cell according to claim 1 .

21. The detection assembly includes a sensing member and a connecting member connected to each other, the connecting member being used to transmit an electrical signal to the sensing member. The battery cell according to any one of claims 1 to 20.

22. The connection member includes an optical fiber.

22. The battery cell of claim 21 .

23. A battery cell according to any one of claims 1 to 22, A battery characterized in that

24. A battery cell according to any one of claims 1 to 22 for supplying electrical energy.

1. A power consuming device comprising:

Images