Battery cover plate, battery cell, battery, and electric device

Abstract

Provided in the present application are a battery cover plate, a battery cell, a battery, and an electric device, which solve the problem of a sensor being prone to detaching from a catch. The battery cover plate comprises a plastic plate, a detection element, and a top cover plate, wherein a mounting groove is formed in a first plate surface of the plastic plate; the detection element is mounted in the mounting groove; the top cover plate is arranged on the first plate surface; and part of the top cover plate covers an opening of the mounting groove.

Description

Battery cover, battery cell, battery and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent application No. 2024201282112, filed on January 18, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the field of battery technology, and in particular to a battery cover, a battery cell, a battery, and an electrical device. Background Art

[0004] A battery cell may include an electrode assembly, an end cap, and a housing. The end cap fits over the housing to form a cavity for mounting the electrode assembly. Sensors are used to detect the environment (e.g., temperature, air pressure, etc.) within the battery cell. These sensors are mounted on the inner wall of the housing using snaps. However, the sensors can easily fall off the snaps, affecting their detection.

[0005] Summary of the Invention

[0006] The main technical problem solved by the present application is to provide a battery cover, a battery cell, a battery and an electrical device to solve the problem that the sensor easily falls off from the buckle.

[0007] In order to solve the above technical problems, the first technical solution adopted in this application is: to provide a battery cover, the battery cover includes a plastic plate, a detection element and a top cover plate, the first plate surface of the plastic plate has a mounting groove; the detection element is installed in the mounting groove; the top cover plate is arranged on the first plate surface; and part of the top cover plate covers the notch of the mounting groove.

[0008] In this way, the detection element is clamped between the mounting groove of the plastic plate and the top cover plate, making the installation of the detection element more stable; and it is more convenient than the snap-on installation and is not easy to fall off. This solves the problem of the sensor easily falling off from the snap. When the whole formed by the plastic plate, the detection element and the top cover plate (i.e. the battery cover plate) blocks the installation port of the shell, the detection element will not affect the installation of the electrode assembly, that is, there is no need to change the installation position of the electrode assembly; it also allows the detection element to be able to adapt to the environment inside the shell.

[0009] In some embodiments, the first surface of the plastic plate further comprises a first terminal hole, a first liquid injection hole, a pressure relief groove, and a second terminal hole; the mounting groove is staggered from the first terminal hole, the first liquid injection hole, the pressure relief groove, and the second terminal hole. This reduces interference between the detection element and the terminal, the liquid injection hole, and the pressure relief mechanism.

[0010] In some embodiments, the first pole hole, the first liquid injection hole, the pressure relief groove, the mounting groove, and the second pole hole are sequentially distributed along the length of the plastic plate. Since the distance between the second pole hole and the pressure relief groove is relatively large, the mounting groove can be designed more freely.

[0011] In some embodiments, the detection element includes a sensor, a processor, and a drive circuit electrically connected in sequence. Based on the sensor's detection signal, the processor controls the drive circuit to output an electrical signal to the battery terminal. In this way, the sensor's detection signal is transmitted to the battery terminal using power line carrier technology, allowing the detection signal to be transmitted losslessly to the battery management system connected to the battery terminal.

[0012] In some embodiments, the detection element further includes a first connecting wire; a first threading hole is defined in the wall of the mounting slot, and the portion of the top cover facing the mounting slot is seamless; one end of the first connecting wire is electrically connected to the drive circuit; the other end of the first connecting wire passes through the first threading hole, is located outside the plastic plate, and is electrically connected to the terminal. In this manner, the sensor's detection signal can be transmitted to the terminal without changing the top cover.

[0013] In some embodiments, the sensor includes at least one of a pressure sensor, a temperature sensor, and a gas sensor, so that the detection element can detect at least one environmental factor within the battery cell.

[0014] In some embodiments, the size of the mounting groove along the first direction is smaller than or equal to the size of the pressure relief groove; the first direction intersects the first plate surface. In this way, the size of the mounting groove along the third direction can be reduced, which will affect the assembly of the battery cell.

[0015] To solve the above technical problems, the second technical solution provided by this application is to provide a battery cell, comprising a housing, an electrode assembly, and the aforementioned battery cover. The housing has a mounting opening; the electrode assembly is mounted within the housing; and the battery cover is connected to the housing and covers the mounting opening. Because the battery cell includes the aforementioned battery cover, the battery cell has the same effect as the battery cover.

[0016] To solve the above technical problems, the third technical solution provided by this application is to provide a battery, comprising a battery case and the above-mentioned battery cells; the battery cells are installed in the battery case. Since the battery includes the above-mentioned battery cells, the battery has the same effect as the battery cells.

[0017] To solve the above technical problems, the fourth technical solution provided by this application is to provide an electrical device. The electrical device includes an electrical device and the above-mentioned battery, wherein the battery is connected to the electrical device. Since the electrical device includes the above-mentioned battery, the electrical device has the effect of a battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0019] FIG1 is a schematic structural diagram of an electrical device provided in this application;

[0020] FIG2 is a schematic structural diagram of a battery provided in this application;

[0021] FIG3 is a schematic structural diagram of a battery cell provided in this application;

[0022] FIG4 is a schematic structural diagram of a battery cover provided in this application;

[0023] FIG5 is a schematic structural diagram of the plastic plate provided in this application;

[0024] FIG6 is a functional module diagram of a detection element provided by the present application;

[0025] FIG7 is a front view of the battery cover provided in this application.

[0026] In the figure: 1. battery; 11. battery case; 111. upper case; 112. lower case; 12. battery cell; 121. connecting member; 122. battery cover; 1221. top cover; 1222. plastic plate; 12221. first plate surface; 12222. first pole hole; 12223. first threading hole; 12224. mounting groove; 12225. pressure relief groove; 12226. first liquid injection hole; 12227. second pole hole; 1223. detection element; 12231. sensor; 12232. processor; 12233. drive circuit; 123. electrode assembly; 124. housing; 125. pole; 126. pressure relief mechanism; 2. electrical device. DETAILED DESCRIPTION

[0027] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0028] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0029] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0030] The terms "first," "second," and "third" in this application are used only for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include at least one of such features. In the description of this application, "multiple" means at least two, for example, two, three, etc., unless otherwise specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative positional relationship, movement, etc. between the components under a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications also change accordingly. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products, or devices.

[0031] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0032] In related technologies, a battery cell may include an electrode assembly, an end cap, and a housing; the end cap is attached to the housing to form a mounting cavity for the electrode assembly. A sensor is attached to the end cap via a clip, allowing the sensor to detect the environment (e.g., temperature, air pressure, etc.) within the battery cell. However, due to external factors such as impact, jolt, and shaking of the battery cell (or battery), the sensor can easily fall off the clip, affecting sensor detection.

[0033] In order to solve the problem that the sensor easily falls off from the buckle. An embodiment of the present application provides a battery cover, and a detection element is installed between the two-layer structure of the battery cover (i.e., the top cover plate and the plastic plate hereinafter), and the detection element is used to detect the environment inside the shell. In this way, the two-layer structure of the battery cover seals the detection element to solve the problem that the sensor easily falls off from the buckle. The electrode assembly is installed on the shell, so that the detection element can detect the environment inside the shell without affecting the installation position of the electrode assembly.

[0034] The embodiments of the present application provide an electrical device. The electrical device may be a vehicle, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, etc. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. For the sake of convenience, the following embodiments are described using a vehicle as an example of an electrical device.

[0035] 1 , the electric equipment may include an electric device 2 and a battery 1 , wherein the battery 1 is electrically connected to the electric device 2 so that the battery 1 provides electric energy to the electric device 2 .

[0036] The electrical device 2 may be a component or device capable of consuming electricity; for example, the electrical device 2 may be a controller. The controller may be a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc. For another example, the electrical device 2 may be an electronic component.

[0037] In the case where the electrical equipment may be a vehicle as shown in FIG1 , the electrical device 2 may be a lamp (eg, headlight, taillight, etc.), a display screen, an instrument panel, a control system (eg, a controller), etc. in the vehicle.

[0038] In some examples, the electric device may further include other parts. For example, when the electric device is a vehicle, the other parts may be the vehicle body, for example, the battery 1 and the electric device 2 are both mounted on the vehicle body.

[0039] The battery 1 is used to provide electric energy to the electric device 2 so as to facilitate the operation of the electric device 2. Referring to FIG2 , the battery 1 may include a battery case 11 and a battery cell 12; the battery cell 12 is installed in the battery case 11.

[0040] The battery case 11 is used to provide a storage space for one or more battery cells 12, so that the battery case 11 can protect the battery cells 12; at the same time, it is also convenient to gather multiple battery cells 12 together. The battery case 11 may include a lower case 112 and an upper case 111, and the upper case 111 is snapped onto the lower case 112 to form a storage space that can accommodate the battery cells 12. The shape of the battery case 11 can be specifically set as needed. For example, the shape of the battery case 11 can be cylindrical, and the corresponding battery 1 can be called a circular battery 1; for another example, the shape of the battery case 11 can be rectangular, and the corresponding battery 1 can be called a rectangular battery 1.

[0041] The battery cells 12 may be secondary batteries, which are batteries that can be recharged to activate their active materials after discharge and continue to be used. The battery cells 12 may include, but are not limited to, lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, and lead-acid batteries.

[0042] In the battery 1, the number of battery cells 12 can be one or more. Among them, multiple battery cells 12 can be connected in series, in parallel, or in mixed connection. Mixed connection means that multiple battery cells 12 are connected in series and in parallel. Multiple battery cells 12 can be directly connected in series, in parallel, or in mixed connection, and then the whole composed of multiple battery cells 12 is accommodated in the box. Of course, it is also possible that multiple battery cells 12 are first connected in series, in parallel, or in mixed connection to form a battery module, and then the multiple battery modules are connected in series, in parallel, or in mixed connection to form a whole, and the whole is accommodated in the box. The multiple battery cells 12 in the battery module can be electrically connected through a busbar component to achieve, for example, parallel connection, series connection, or mixed connection of multiple battery cells 12 in the battery module.

[0043] Referring to Figure 3, the battery cell 12 may include a housing 124, an electrode assembly 123, and a battery cover 122. The housing 124 has a cavity and a mounting opening. The electrode assembly 123 is mounted in the housing cavity. The battery cover 122 is connected to the housing 124 and covers the mounting opening.

[0044] The electrode assembly 123 is installed in the housing 124 through the mounting opening. After the battery cover 122 (also called an end cap) is connected to the housing 124, the battery cover 122 covers the mounting opening to form a chamber for accommodating the electrode assembly 123. There can be one or more electrode assemblies 123. The housing 124 is filled with an electrolyte, such as an electrolyte solution. The battery cover 122 is generally flat.

[0045] The electrode assembly 123 may include a positive electrode and a negative electrode, as well as a separator disposed between the positive and negative electrodes. During the charge and discharge process of the battery cell, active ions (e.g., lithium ions) are intercalated and released between the positive and negative electrodes. The separator can prevent a short circuit between the positive and negative electrodes to a certain extent while allowing the active ions to pass through.

[0046] The shell 124 is a hollow structure, and a storage space for accommodating the electrode assembly 123 and the electrolyte is formed therein. The shape of the shell 124 can be determined according to the specific shape of the electrode assembly 123. For example, if the electrode assembly 123 is a rectangular parallelepiped structure, a rectangular parallelepiped shell can be selected. The material of the shell 124 can be various, for example, the material of the shell 124 can be metal or plastic. Alternatively, the material of the shell 124 can be copper, iron, aluminum, steel, aluminum alloy, etc. Exemplarily, the shell 124 can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film, etc.

[0047] The battery cell 12 may further include a pressure relief mechanism 126, two poles 125 and two connecting members 121 (also referred to as current collecting members). The two poles 125 may be provided on the battery cover 122, for example, the two poles 125 are fixed to the battery cover 122. The two poles 125 are respectively a positive pole and a negative pole. One pole 125 corresponds to one connecting member 121. The connecting member 121 is located between the battery cover 122 and the electrode assembly 123, and is used to electrically connect the electrode assembly 123 and the pole 125. The pressure relief mechanism 126 may be provided on the battery cover 122, for example, the pressure relief mechanism 126 is fixed to the battery cover 122. The pressure relief mechanism 126 is used to actuate to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 12 reaches a threshold value. For example, the pressure relief mechanism 126 may be a temperature-sensitive pressure relief mechanism, or for another example, the pressure relief mechanism 126 may be a pressure-sensitive pressure relief mechanism.

[0048] Referring to Figures 4-6 , the battery cover 122 may include a plastic plate 1222, a detection element 1223, and a top cover 1221. The first surface 12221 of the plastic plate 1222 defines a mounting groove 12224. The detection element 1223 is mounted within the mounting groove 12224. The top cover 1221 is disposed on the first surface 12221; a portion of the top cover 1221 covers the notch of the mounting groove 12224.

[0049] In this way, the detection element 1223 is clamped between the mounting groove of the plastic plate 1222 and the top cover plate 1221, making the installation of the detection element 1223 more stable; and it is more convenient than the snap installation and is not easy to fall off. This solves the problem that the sensor easily falls off from the snap. When the whole formed by the plastic plate 1222, the detection element 1223 and the top cover plate 1221 (i.e., the battery cover plate 122) blocks the installation port of the shell 124, the detection element 1223 will not affect the installation of the electrode assembly 123, that is, there is no need to change the installation position of the electrode assembly 123; it can also enable the detection element 1223 to be able to adapt to the environment inside the shell 124.

[0050] The plastic plate 1222 has a first plate surface 12221 and a second plate surface facing each other. The first plate surface 12221 of the plastic plate 1222 has a mounting groove 12224. It can be understood that the notch of the mounting groove 12224 is located on the first plate surface 12221 and does not pass through the second plate surface.

[0051] The material of the top cover plate 1221 can be a metal material, which can be a single metal, such as aluminum, iron, copper, etc. The metal material can also be a single non-metallic material, such as an alloy of the above-mentioned single metals. The material of the top cover plate 1221 can be a non-metallic material, such as rubber, organic glass (e.g., forming an acrylic plate), etc.

[0052] In some embodiments, the cross-section of the mounting groove 12224 is square or circular. In other embodiments, the cross-section of the mounting groove 12224 is rectangular or elliptical, and the cross-section is parallel to the first plate surface 12221. For example, the ratio of the length (or major axis) of the mounting groove 12224 to the width (or minor axis) of the mounting groove 12224 can be, but is not limited to, 1:2. The length of the mounting groove 12224 intersects (e.g., is perpendicular to) the length of the plastic plate 1222. In some examples, the length of the mounting groove 12224 is 1 cm to 2 cm (e.g., 1 cm, 1.1 cm, 1.2 cm, 1.3 cm, 1.4 cm, 1.5 cm, 1.6 cm, 1.7 cm, 1.8 cm, 1.9 cm, or 2 cm). In other examples, the width of the mounting slot 12224 is 2 cm to 4 cm (e.g., 2 cm, 2.2 cm, 2.4 cm, 2.6 cm, 2.8 cm, 3 cm, 3.2 cm, 3.4 cm, 3.4 cm, 3.6 cm, 3.8 cm, 4 cm). In other examples, the length of the mounting slot 12224 is 1 cm to 2 cm, and the width of the mounting slot 12224 is 2 cm to 4 cm.

[0053] In some embodiments, the first surface 12221 of the plastic plate 1222 further includes a first post hole 12222, a first liquid injection hole 12226, a pressure relief groove 12225, and a second post hole 12227. The mounting groove 12224 is staggered from the first post hole 12222, the first liquid injection hole 12226, the pressure relief groove 12225, and the second post hole 12227. This minimizes interference between the detection element 1223 and the post 125, the liquid injection hole, and the pressure relief mechanism 126.

[0054] For example, the third pole hole, second liquid injection hole, pressure relief hole, and fourth pole hole on the top cover plate 1221 are connected to the first pole hole 12222, liquid injection hole, pressure relief groove 12225, and second pole hole 12227 on the plastic plate 1222, respectively. In this case, the first pole hole 12222 and the third pole hole can form a single pole hole, and the second pole hole 12227 and the fourth pole hole can form another pole hole, so that two pole holes are formed on the battery cover plate 122, and the two poles 125 mentioned above can be installed in these two pole holes respectively. The first liquid injection hole 12226 and the second liquid injection hole are connected to form an injection hole, through which electrolyte can be injected into the shell 124; after the electrolyte injection is completed, the injection hole can be sealed. The pressure relief mechanism 126 is installed in the pressure relief groove 12225 through the pressure relief hole, and the pressure relief groove 12225 is communicated with the chamber of the shell 124; that is, the pressure relief mechanism 126 is connected to the chamber of the shell 124 through the pressure relief hole and the pressure relief groove 12225.

[0055] In some embodiments, the first post hole 12222, the first liquid injection hole 12226, the pressure relief groove 12225, the mounting groove 12224, and the second post hole 12227 are sequentially arranged along the length of the plastic plate 1222. For example, the centers of the first post hole 12222, the first liquid injection hole 12226, the pressure relief groove 12225, the mounting groove 12224, and the second post hole 12227 are all located on an axis parallel to the long side of the rectangular plastic plate 1222. In other words, the first liquid injection hole 12226 is located between the first post hole 12222 and the pressure relief groove 12225, and the mounting groove 12224 is located between the second post hole 12227 and the pressure relief groove 12225. The greater distance between the second post hole 12227 and the pressure relief groove 12225 allows for greater flexibility in the design of the mounting groove 12224.

[0056] In other embodiments, the mounting groove 12224 may be located on a side of the second pole hole 12227 away from the pressure relief groove 12225. In other embodiments, the mounting groove 12224 may be located on a side of the first pole hole 12222 away from the pressure relief groove 12225. In other embodiments, the mounting groove 12224 may be located between the first pole hole 12222 and the first liquid injection hole 12226.

[0057] In some embodiments, referring to FIG6 , the detection element 1223 includes a sensor 12231, a processor 12232, and a drive circuit 12233, which are electrically connected in sequence. The processor 12232 controls the drive circuit 12233 to output an electrical signal to the electrode 125 based on the detection signal from the sensor 12231. In this way, the detection signal from the sensor 12231 is transmitted to the electrode 125 using power line carrier technology, allowing the detection signal to be transmitted losslessly to the battery management system connected to the electrode 125.

[0058] The detection signal varies depending on the type of sensor 12231. For example, when the sensor 12231 is a temperature sensor 12231, the detection signal is a temperature signal. For another example, when the sensor 12231 is a pressure sensor 12231, the detection signal is a pressure signal.

[0059] Processor 12232 can be a central processing unit (CPU), a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0060] Exemplarily, the detection element 1223 may further include an information memory, which is connected to the processor 12232. The processor 12232 controls the information memory to store the detection signal of the sensor 12231 according to the detection signal of the sensor 12231.

[0061] In some embodiments, the detection element 1223 further includes a first connecting wire. The wall (e.g., bottom wall) of the mounting slot 12224 includes a first threading hole 12223, and the portion of the top cover 1221 facing the mounting slot 12224 is seamless. One end of the first connecting wire is electrically connected to the drive circuit 12233. The other end of the first connecting wire passes through the first threading hole 12223, is located outside the plastic plate 1222, and is electrically connected to the pole 125. In this way, the detection signal from the sensor 12231 is transmitted to the pole 125 via the first connecting wire using power line carrier technology. Therefore, the portion of the top cover 1221 facing the mounting slot 12224 is seamless, meaning that the structure of the top cover 1221 remains unchanged.

[0062] In addition, the first connecting line can also serve as a power line, so that the electrode assembly can supply power to the sensor 12231. That is, the first connecting line can serve as both a power line and a signal line. In other words, the first connecting line can be composed of multiple single lines.

[0063] The portion of the top cover 1221 that faces the mounting groove 12224 is seamless; this means that the portion of the top cover 1221 that is the orthographic projection of the mounting groove 12224 on the top cover 1221 is seamless. A seamless structure means that this portion of the structure has no through holes or seams, thereby sealing the mounting groove 12224.

[0064] In other embodiments, the top cover plate 1221 has a second threading hole that communicates with the mounting slot 12224. The second connecting wire of the detection element 1223 passes through the second threading hole and is located outside the top cover plate 1221. The second connecting wire located outside the top cover plate 1221 is connected to the battery management system, so that the detection signal of the detection element 1223 is transmitted to the battery management system via the second connecting wire. In this embodiment, the detection element 1223 may include a sensor and a second connecting wire, and the second connecting wire is connected to the sensor.

[0065] In some embodiments, the sensor 12231 includes at least one of a pressure sensor, a temperature sensor, and a gas sensor, so that the detection element 1223 can detect at least one environmental factor within the battery cell 12 .

[0066] Exemplarily, sensor 12231 is a pressure sensor. Furthermore, sensor 12231 is a temperature sensor. Furthermore, sensor 12231 is a gas sensor. Furthermore, sensor 12231 includes a pressure sensor and a temperature sensor. Furthermore, sensor 12231 is a gas sensor and a pressure sensor. Furthermore, sensor 12231 is a temperature sensor and a gas sensor. Furthermore, sensor 12231 includes a pressure sensor, a temperature sensor, and a gas sensor. In some examples, sensor 12231 also includes sensors such as a power supply module and a voltage collector.

[0067] In some embodiments, as shown in FIG7 , along a first direction X, the dimensions of mounting groove 12224 are smaller than or equal to the dimensions of pressure relief groove 12225; that is, the depth of mounting groove 12224 is smaller than or equal to the depth of pressure relief groove 12225. The first direction X intersects (e.g., is perpendicular to) the first plate surface 12221; that is, the first direction X is the thickness direction of plastic plate 1222. This ensures that mounting groove 12224 does not interfere with the assembly of the electrode assembly and battery cover.

[0068] For example, the thickness of the bottom wall of the mounting groove 12224 is less than the thickness of the bottom wall of the corresponding pressure relief groove 12225. In this way, it is convenient to set the first threading hole to facilitate the extraction of the first connecting line.

[0069] The above description is only an implementation method of the present application and does not limit the scope of patent protection of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the scope of patent protection of the present application.

Claims

1. A battery cover plate, wherein, Comprising: A plastic plate, on the first plate surface of which there is an installation groove; A detection element, installed in the installation groove; A top cover plate, arranged on the first plate surface; a part of the top cover plate covers the notch of the installation groove.

2. The battery cover plate according to claim 1, wherein The first plate surface of the plastic plate further has a first pole hole, a first liquid injection hole, a pressure relief groove and a second pole hole; the installation groove is staggered from the first pole hole, the first liquid injection hole, the pressure relief groove and the second pole hole.

3. The battery cover plate according to claim 2, wherein The first pole hole, the first liquid injection hole, the pressure relief groove, the installation groove and the second pole hole are sequentially distributed along the length direction of the plastic plate.

4. The battery cover plate according to any one of claims 1 to 3, wherein The detection element includes a sensor, a processor and a drive circuit which are electrically connected in sequence; The processor controls the drive circuit to output an electrical signal to the pole according to the detection signal of the sensor.

5. The battery cover plate according to claim 4, wherein The detection element further includes a first connecting wire; there is a first wire passing hole on the groove wall of the installation groove, and the part of the top cover plate facing the installation groove is a seamless structure; one end of the first connecting wire is electrically connected to the drive circuit; the other end of the first connecting wire passes through the first wire passing hole and is located outside the plastic plate and is electrically connected to the pole.

6. The battery cover plate according to claim 4 or 5, wherein The sensor includes at least one of a pressure sensor, a temperature sensor and a gas sensor.

7. The battery cover plate according to any one of claims 1 to 6, wherein Along the first direction, the size of the installation groove is less than or equal to the size of the pressure relief groove; the first direction intersects with the first plate surface.

8. A battery cell, wherein, Comprising: A housing, having an installation opening; An electrode assembly, installed in the housing; The battery cover plate according to any one of claims 1 to 7, the battery cover plate is connected to the housing and covers the installation opening.

9. A battery, wherein, Comprising: A battery box body and the battery cell according to claim 8; The battery cell is installed in the battery box body.

10. An electrical device, wherein, Comprising: An electrical device and the battery according to claim 9, the battery is connected to the electrical device.

Images