A battery cover plate, a battery and a power system

Abstract

The application provides a battery cover plate, a battery and a power system, and relates to the technical field of batteries, and aims to solve the problems of signal transmission structure and sealing performance of a battery cover plate. The battery cover plate provided by the application comprises a plate body, a battery management unit and a sensor assembly. The plate body has an outer surface and an inner surface opposite to the outer surface. The battery management unit is arranged in the plate body. The battery management unit and the outer surface are provided with a transmission structure. The battery management unit comprises a wireless communication module. The wireless communication module can communicate wirelessly with the outside through the transmission structure. The sensor assembly is connected with the battery management unit. The sensor assembly is arranged in the plate body and protrudes from the inner surface. In the battery cover plate provided by the application, the battery management unit arranged in the plate body of the battery cover plate can be connected with the battery management system in a wireless communication mode, so that the arrangement of a cable is avoided, and the sealing performance of the battery cover plate can be effectively ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and in particular to a battery cover plate, a battery and a power system. BACKGROUND

[0002] With the continuous popularity and development of clean energy, batteries are widely used in data centers, base stations, mobile phones and vehicles, etc. At the same time, people have higher requirements for the safety and intelligence of the use of batteries.

[0003] In the actual application of the battery, the health status of the battery needs to be effectively monitored to ensure the safety and service life of the battery. The battery mainly includes a shell and a bare cell located inside the shell. In order to monitor the health status of the battery, the current battery can also include a battery management unit (BMU) and a sensor assembly. The battery management unit is usually arranged outside the shell, and the sensor assembly needs to be arranged inside the shell for effective detection of parameters such as temperature, pressure and gas composition inside the shell. At present, the shell is usually made of metal materials such as aluminum alloy, so it has electromagnetic shielding performance. The battery management unit and the sensor assembly need to be connected through a cable, and the cable needs to pass through the shell, so there are problems such as complex sealing between the cable and the shell and difficult to guarantee the airtightness, so it cannot effectively guarantee the safety of the battery, and the manufacturing process is also relatively complex. SUMMARY

[0004] The present application provides a battery cover plate, a battery and a power system which are convenient to manufacture, can effectively guarantee the airtightness and safety of the battery.

[0005] In one aspect, the present application provides a battery cover plate, comprising a plate body, a battery management unit and a sensor assembly. The plate body has an outer surface and an inner surface opposite to the outer surface. The battery management unit is arranged in the plate body, and the battery management unit and the outer surface have a transmission structure. The battery management unit includes a wireless communication module, and the wireless communication module can communicate wirelessly with the outside through the transmission structure. The sensor assembly is connected with the battery management unit, wherein the sensor assembly is arranged on the plate body and protrudes from the inner surface.

[0006] It should be noted that in specific applications, the battery can include a battery cover plate, a shell and a bare cell. The shell can have a recess, the bare cell can be arranged in the recess, and the inner surface of the battery cover plate faces the recess and covers the opening of the recess, that is, the battery cover plate and the shell can constitute a closed recess to ensure the airtightness of the bare cell. The sensor assembly can be used to detect the temperature of the recess (or the bare cell), the air pressure in the recess, the gas composition and other parameters. The sensor assembly is connected with the battery management unit, so that the detection information of the sensor assembly can be transmitted to the battery management unit. The battery management unit can be connected with the positive and negative tabs of the bare cell for detecting the state of charge, the state of health and the power state of the bare cell. Since the plate body has a transmission structure for penetrating electromagnetic waves, the battery management unit can transmit the detection information obtained by the sensor assembly to the external battery management system through the wireless communication module. Alternatively, it can be understood that in the battery cover plate provided by the application, by arranging the transmission structure for electromagnetic wave propagation, the battery management unit arranged in the plate body of the battery cover plate can be connected with the battery management system in a wireless communication mode, thereby avoiding the arrangement of cables, and the airtightness of the battery cover plate can be effectively ensured. In addition, through wireless communication, the flexibility of the battery during deployment can be improved, the constraint of the cable can be avoided, and the maintenance difficulty can be reduced.

[0007] In an example, the battery cover plate can include an insulator, and the battery management unit can be located in the insulator. By arranging the battery management unit in the insulator, not only can the battery management unit be well protected from external dust, water vapor and other impurities, but also the connection strength between the battery management unit and the plate body can be improved, and the battery management unit and the plate body can be effectively prevented from shaking or separating.

[0008] In specific arrangements, the position of the insulator in the plate body can be various.

[0009] For example, the insulator can be located between the outer surface and the inner surface, and in order to enable the battery management unit in the insulator to communicate wirelessly with the outside world, one end of the transmission structure can extend to the insulator.

[0010] The transmission structure can be a slot or a blind hole, and the specific shape of the transmission structure is not limited in the application. In addition, the transmission structure can be filled with insulating material to improve the flatness of the inner surface.

[0011] Alternatively, in an example, the insulator and the insulating material filled in the transmission structure can be an integrally formed structure to facilitate the convenience during manufacturing.

[0012] Alternatively, in an example, one end of the insulator can extend to the inner surface, the sensor assembly can be arranged in the insulator, and a part (e.g., a detection head) of the sensor assembly for detection can extend out of the end surface of the second end. When manufacturing, the battery management unit and the sensor assembly can be encapsulated in the insulator together, thereby facilitating the simplification of the manufacturing process.

[0013] In addition, in specific applications, the plate body can be made of metal materials such as aluminum or aluminum alloy. The insulator can be prepared by injection molding or compression molding process. Alternatively, the entire plate body can be made of insulating materials, and the insulator can be a part of the plate body.

[0014] In specific applications, the sensor assembly can include temperature sensors, air pressure sensors, or gas sensors. The temperature sensor can be used to detect the temperature of the bare battery cell (or in the groove). The air pressure sensor can be used to detect the air pressure in the groove. The gas sensor can be used to detect the gas composition in the groove, or it can also detect the proportion of the gas composition. In addition, the sensor assembly can be arranged in the insulator, or it can be arranged on the inner surface of the plate body. Alternatively, part of the sensors in the sensor assembly can be arranged in the insulator, and the other part of the sensors can be arranged on the inner surface of the plate body. The number and type of sensors included in the sensor assembly are not limited in the present application.

[0015] In an example, the battery cover plate can further include a positive pole and a negative pole. The positive pole and the negative pole can be arranged on the plate body, and the battery management unit is connected with the positive pole and the negative pole.

[0016] In specific applications, the positive pole can be connected with the positive tab of the bare battery cell, and the negative pole can be connected with the negative tab of the bare battery cell. The positive pole and the negative pole can extend out of the outer surface to facilitate connection with other power-consuming devices or power supply devices.

[0017] In addition, since the battery management unit can be connected with the positive pole and the negative pole, the battery management unit can be powered by the bare battery cell, thereby avoiding the need to set up an additional power supply to power the battery management unit.

[0018] In an example, the battery management system can further include a power supply control circuit, and the sensor assembly can be connected with the battery management system through the power supply control circuit. Alternatively, the battery management system can supply power to the sensor assembly through the power supply control circuit. The battery management system can connect or disconnect the power supply of the sensor assembly through the power supply control circuit, so as to achieve the effect of energy saving.

[0019] In an example, the battery cover plate can further comprise an explosion-proof structure, which can be arranged on the plate body. The explosion-proof structure can be an explosion-proof valve or an explosion-proof film, etc. When the pressure in the groove is too large, the explosion-proof structure can be used for pressure relief to prevent the battery from exploding or other adverse conditions.

[0020] In another aspect, the application also provides a battery, which can comprise a shell and a bare cell. The shell has a groove, and the bare cell can be arranged in the groove. The battery can further comprise any of the battery cover plates described above. The battery cover plate can be arranged to cover the opening of the groove, the inner surface of the battery cover plate faces the groove, and the sensor assembly extends into the groove.

[0021] In specific applications, the shell can have one groove or multiple grooves. When the shell has multiple grooves, the battery cover plate can cover the opening of each groove. The number of sensor assemblies in the battery cover plate can be the same as the number of grooves, and the sensor assemblies are arranged one-to-one corresponding to the grooves.

[0022] In addition, when the battery management unit is arranged, the number of battery management units can be the same as the number of sensor assemblies, or the number of battery management units can be less than the number of sensor assemblies.

[0023] In addition, in an example, the battery can further comprise a battery management system, and the battery management unit is wirelessly connected to the battery management system. In specific applications, the battery management unit can send detection information to the battery management system, and the battery management system can manage each battery management unit individually according to the detection information to facilitate fine management.

[0024] In another aspect, the application also provides a power system, which can comprise any of the batteries described above. The inverter can be connected to the battery, which can be used to convert alternating current into direct current to provide power to the battery, or to convert direct current from the battery into alternating current. In specific applications, the power system can be a energy storage system, or a solar or wind power system, and the application does not limit the specific type of power system. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A schematic diagram of the cross-sectional structure of a conventional battery provided by the embodiment of the application;

[0026] Figure 2 Another schematic diagram of the cross-sectional structure of a conventional battery provided by the embodiment of the application;

[0027] Figure 3 A schematic diagram of the cross-sectional structure of a battery provided by the embodiment of the application;

[0028] Figure 4 A cross-sectional view of a battery cover provided in an embodiment of this application;

[0029] Figure 5 for Figure 4 Top view;

[0030] Figure 6 A cross-sectional structural schematic diagram of another battery cover provided in an embodiment of this application;

[0031] Figure 7 for Figure 6 Top view;

[0032] Figure 8 A cross-sectional structural schematic diagram of another battery cover provided in an embodiment of this application;

[0033] Figure 9 A cross-sectional structural diagram of a battery provided in an embodiment of this application;

[0034] Figure 10 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0035] Figure 11 An exploded view of another battery provided in an embodiment of this application;

[0036] Figure 12 This is a structural block diagram of a power system provided in an embodiment of this application. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the application will now be described in further detail with reference to the accompanying drawings.

[0038] To facilitate understanding of the battery cover provided in the embodiments of this application, its application scenarios will be introduced first below.

[0039] like Figure 1 As shown, a conventional battery 01 provided in this application embodiment mainly includes a casing 011, a bare battery cell 012, and a battery cover 013. Specifically, the casing 011 has a groove 0111, the bare battery cell 012 is disposed in the groove 0111, and the battery cover 013 seals the opening of the groove 0111 to ensure the airtightness of the groove 0111. In practical applications, an electrolyte or other medium is usually placed in the groove 0111 to ensure the normal charging and discharging function of the bare battery cell 012. In addition, during the use of the battery 01, the bare battery cell 012 (or the groove 0111) may experience overcharging and discharging, pressure changes, temperature changes, or gas composition changes. Therefore, in order to ensure the safety of the battery 01, it is necessary to effectively monitor the charge, temperature, and gas composition inside the battery 01 (or the bare battery cell).

[0040] like Figure 2 As shown. Currently, to achieve intelligent management of battery 01, a battery management unit 02, a sensor assembly 03, and a battery management system 04 are typically included. The battery management unit 02 and sensor assembly 03 can be fixed to the battery cover 013. Specifically, the sensor assembly 03 extends into the groove 0111 to effectively detect the temperature, pressure, and gas composition within the groove 0111 and sends the detection data to the battery management unit 02. The battery management unit 02 can then send the detection data to the battery management system 04. Furthermore, the battery management unit 02 can connect to the positive and negative tabs 0121 and 0122 of the bare cell 012 to detect parameters such as the state of charge (SOC), state of health, and state of power of the bare cell 012. The battery management system 04 can adjust the temperature of battery 01 based on the detection data from the sensor assembly 03 and the battery management unit 02, or it can regulate the charging and discharging state of battery 01 through the battery management unit 02. Currently, the battery cover 013 is generally made of metal materials such as aluminum or aluminum alloy, which provides electromagnetic shielding. If the battery management unit 02 is located inside the battery cover 013, the battery management unit 02 and the battery management system 04 need to be connected via a cable 05. Additionally, a through-hole (not shown in the figure) needs to be provided in the battery cover 013 for the cable 05 to pass through. However, the through-hole would compromise the sealing performance of the battery 01, increasing the safety risks associated with the battery 01. Sealing the cable 05 with the battery cover 013 would result in complex manufacturing processes and low reliability.

[0041] Therefore, this application provides a battery cover that is simple in structure, easy to implement, and can effectively improve battery safety.

[0042] To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] The terminology used in the following embodiments is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. As used in the specification and appended claims of this application, the singular expressions “a,” “an,” and “the” are intended to also include expressions such as “one or more,” unless the context clearly indicates otherwise. It should also be understood that in the following embodiments of this application, “at least one” means one, two, or more.

[0044] Reference being made in this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in one embodiment" or "in some embodiments" in various places in the specification are not necessarily all referring to the same embodiment, however, and can refer to one or more but not all embodiments of the application, unless otherwise specified. The terms "including," "containing," "having," and variations thereof are meant to encompass the presence of successors, equivalents, portions, types, instances, and / or aspects of the stated features herein and does not exclude the presence of additional features.

[0045] As shown in the drawings, Figure 3 In one embodiment provided by the application, the battery 10 can include a battery cover plate 11, a shell 12, and a bare battery cell 13. The shell 12 has a recess 121, the bare battery cell 13 is arranged in the recess 121, and the battery cover plate 11 covers the opening of the recess 121, that is, the battery cover plate 11 and the shell 12 can constitute a sealed structure to ensure the sealing of the bare battery cell 13. The battery cover plate 11 can include a plate body 111, a battery management unit 02, and a sensor assembly 03. Specifically, the plate body 111 has an outer surface 111a (such as the upper plate surface in the drawings) and an inner surface 111b (such as the lower plate surface in the drawings) opposite to the outer surface 111a, and the outer surface 111a has a transmission structure 110 for electromagnetic wave transmission. The battery management unit 02 is arranged in the plate body 111, and the battery management unit 02 includes a wireless communication module which can communicate with the outside through the transmission structure 110. The sensor assembly 03 extends from the inner surface 111b and is connected with the battery management unit 02. Specifically, the sensor assembly 03 can be used to detect the temperature in the recess 121 (or the bare battery cell 13), the air pressure in the recess 121, the gas composition, and the like. The sensor assembly 03 is connected with the battery management unit 02, so that the detection information of the sensor assembly 03 can be transmitted to the battery management unit 02. The battery management unit 02 can be connected with the positive electrode lug 131 and the negative electrode lug 132 of the bare battery cell 13, and is used to detect the state of charge, the state of health, and the power state of the bare battery cell 13 and the like. Since the plate body 111 has the transmission structure 110 for electromagnetic wave transmission, the battery management unit 02 can transmit the detection information obtained by the sensor assembly 03 to the battery management system 04 or the like outside through the wireless communication module. Alternatively, it can be understood that in the battery cover plate 11 provided by the application, the transmission structure 110 for electromagnetic wave transmission is arranged, so that the battery management unit 02 arranged in the plate body 111 of the battery cover plate 11 can be connected with the battery management system 04 in a wireless communication mode, thereby avoiding the arrangement of a cable, and the sealing of the battery cover plate 11 can be effectively ensured. In addition, in the wireless communication mode, the flexibility of the battery 10 during deployment can be improved, the constraint of the cable can be avoided, and the maintenance difficulty can be reduced.

[0046] It should be noted that the bare battery cell 13 refers to an electrochemical cell containing a positive electrode and a negative electrode, and the specific chemical composition and type are not limited in the present application. Alternatively, the battery 10 can be a lithium battery, a lead-acid battery, a lithium-sulfur battery, a sodium battery, a magnesium battery, an aluminum battery, or a potassium battery, etc. In addition, the wireless communication module can be a device that meets the wireless technology standards such as Bluetooth or WiFi, and the specific type, working frequency band and technical standard of the wireless communication module are not limited in the present application.

[0047] In specific applications, the plate body 111 can be made of metal materials such as aluminum, aluminum alloy or steel, so that the plate body 111 has good structural strength. Of course, since the plate body 111 made of metal materials generally has electromagnetic shielding effect, in the embodiments provided by the present application, after the transmission structure 110 is arranged, the battery management unit 02 located inside the plate body 111 can communicate with the external battery management system 04 through wireless communication. It can be understood that in other embodiments, the plate body 111 can also be made of at least one material of polypropylene, polyvinylidene fluoride, polyethylene, polymethyl methacrylate, polyvinyl acetate and copolymers thereof. Alternatively, it can be understood that the plate body 111 can be made of insulating materials so that the entire plate body 111 does not have electromagnetic shielding effect, so that the battery management unit 02 arranged inside the plate body 111 can communicate with the outside through wireless communication.

[0048] It should be noted that when the plate body 111 is made of materials such as insulating materials that do not have electromagnetic shielding effect or have weak electromagnetic shielding effect, the transmission structure 110 can be a part of the region between the outer surface 111a of the plate body 111 and the battery management unit 02, or the transmission structure 110 can also be a structure with a solid shape such as a gap or a blind hole extending from the outer surface 111a to the battery management unit 02.

[0049] In order to facilitate understanding of the technical solutions of the present application, the plate body 111 made of materials with electromagnetic shielding effect such as metal will be exemplarily described below.

[0050] In specific applications, the battery management unit 02 can be arranged in various ways.

[0051] For example, as shown in FIG. 1, the battery management unit 02 can be arranged on the outer surface 111a of the plate body 111. Figure 4As shown, in another example provided in this application, the battery cover 11 may further include an insulator 112, within which the battery management unit 02 may be located. During manufacturing, a receiving cavity (not shown) for accommodating the insulator 112 may be formed in the plate 111. The battery management unit 02 is then placed within the receiving cavity, and finally, insulating material is injected into the receiving cavity. After the insulating material cures, the insulator 112 is formed. Alternatively, the battery management unit 02 may be encapsulated within the insulator 112 using an injection molding process, and then the insulator 112 with the battery management unit 02 is fixed within the receiving cavity.

[0052] The insulator 112 can be made of insulating materials such as polypropylene, polyvinylidene fluoride, polyethylene, polymethyl methacrylate, polyvinyl acetate, and their copolymers, allowing electromagnetic waves to propagate through the insulator 112. By placing the battery management unit 02 inside the insulator 112, not only is the battery management unit 02 well protected from corrosion by external dust or moisture, but the connection strength between the battery management unit 02 and the board 111 is also improved, effectively preventing the battery management unit 02 from shaking or detaching from the board 111.

[0053] In practice, the position of the insulator 112 within the plate 111 can be varied.

[0054] For example, such as Figure 4 As shown in one example provided in this application, the insulator 112 is located inside the plate 111, that is, the insulator 112 does not extend to the outer surface 111a or the inner surface 111b.

[0055] Furthermore, in order to enable the battery management unit 02 to communicate wirelessly with the outside world, one end of the transmission structure 110 can extend into the insulator 112. It should be understood that "one end of the transmission structure 110" refers to the portion of the transmission structure 110 facing the insulator; specifically, this portion facing the insulator can be a regular or irregular surface. It should be noted that "one end of the transmission structure 110" does not mean that the transmission structure 110 is elongated along the thickness direction of the insulator 112.

[0056] For example, please refer to the following: Figure 4 and Figure 5In an example provided by the present application, the transmission structure 110 is specifically a slit, the slit has a certain depth, and the bottom end of the slit extends to the upper surface of the insulator 112. The upper surface of the insulator 112 refers to the surface of the insulator 112 that is opposite to and close to the outer surface 111a. The electromagnetic wave generated by the wireless communication module in the battery management unit 02 can be transmitted to the outside through the slit. Alternatively, the electromagnetic wave from the outside can be transmitted to the wireless communication module in the battery management unit 02 through the slit.

[0057] Of course, in other embodiments, the transmission structure 110 can also be a blind hole or the like. In addition, the number of transmission structures 110 can be one, two or more, and the present application does not limit the specific shape and number of transmission structures 110.

[0058] Alternatively, as shown in Figure 6 and Figure 7 , in another example provided by the present application, the transmission structure 110 can also be filled with insulating material, so as to ensure the flatness of the outer surface 111a. The insulating material filled in the transmission structure 110 can be the same as or different from the material of the insulator 112. In addition, when the insulator 112 is filled in the accommodation cavity, the insulating material can also be filled in the transmission structure 110 at the same time. The insulator 112 and the insulating material filled in the transmission structure 110 can be an integrally formed structure, so as to simplify the manufacturing process.

[0059] In addition, as shown in Figure 8 , in another example provided by the present application, the second end (lower end in the figure) of the insulator 112 can extend to the inner surface 111b, and the insulator 112 does not extend to the outer surface 111a. Through such a structure, the anti-theft effect of the battery management unit 02 can be improved.

[0060] Specifically, please refer to Figure 8 and Figure 9 . After the battery cover plate 11 is sealed at the opening of the groove 121, the outer surface 111a can be a flat surface, and therefore the position of the insulator 112 or the battery management unit 02 is hidden. In addition, the plate body 111 and the shell 12 can be fixedly connected by screws, rivets or welding, so as to effectively improve the anti-theft effect of the battery management unit 02.

[0061] In addition, when the battery management unit 02 is injected into the insulator 112, the sensor assembly 03 can be injected at the same time. Specifically, the battery management unit 02 and the sensor assembly 03 can be connected first to realize the communication connection or power supply connection between the battery management unit 02 and the sensor assembly 03. The connection between the battery management unit 02 and the sensor assembly 03 can be realized through a microstrip line or a wire connection structure. Alternatively, the battery management unit 02 and the sensor assembly 03 can be arranged on the same circuit board. Then, the battery management unit 02 and the sensor assembly 03 are processed by injection molding or compression molding process to prepare the insulator 112, and the battery management unit 02 is injected into the insulator 112, and part of the sensor assembly 03 is injected into the insulator 112. It should be noted that when the sensor assembly 03 is injected, the part of the sensor assembly 03 used for detection (for example, the detection head) protrudes from the insulator 112 to prevent the insulator 112 from hindering the detection function of the sensor assembly 03.

[0062] In the examples provided in the present application, part of the battery management unit 02 and the sensor assembly 03 can be injected into the insulator 112, so that the fixation between the battery management unit 02, the sensor assembly 03 and the insulator 112 can be realized. In addition, the battery management unit 02, the sensor assembly 03 and the connection structure between the battery management unit 02 and the sensor can be effectively protected by the insulator 112, so that the safety can be effectively improved. In addition, the battery management unit 02 and the sensor assembly 03 can be made into an integrated structure through the insulator 112, so that they can be efficiently and accurately applied to the plate body 111, which is conducive to improving the convenience and application range during manufacturing.

[0063] Of course, in other embodiments, the first end of the insulator 112 can extend to the outer surface 111a, and the second end can extend to the inner surface 111b, so that the manufacturing efficiency can be effectively improved and the manufacturing process can be simplified.

[0064] It should be noted that in specific applications, the sensor assembly 03 can include a temperature sensor, a gas pressure sensor or a gas sensor, etc. The temperature sensor can be used to detect the temperature of the bare battery cell 13 (or in the groove 121). The gas pressure sensor can be used to detect the gas pressure in the groove 121. The gas sensor can be used to detect the gas composition in the groove 121, or the proportion of the gas composition, etc. In addition, the sensor assembly 03 can be arranged in the insulator 112, or can be arranged on the inner surface 111b of the plate body 111. Alternatively, part of the sensor assembly 03 can be arranged in the insulator 112, and the other part of the sensor assembly 03 can be arranged on the inner surface 111b of the plate body 111.

[0065] Alternatively, in other embodiments, the insulator 112 can also be omitted. For example, the battery management unit 02 can be fixed in the accommodating cavity by screwing, welding or bonding, etc. When the battery cover plate 11 is subjected to vibration or external force impact, the battery management unit 02 can still be stably located in the accommodating cavity, thereby having good structural safety. When the insulator 112 is omitted, the position of the accommodating cavity in the plate body 111 can be similar to the position of the insulator 112 in the above example, which will not be repeated here.

[0066] In actual application, the forming method and preparation process between the battery management unit 02, the insulator 112 and the plate body 111 can be flexibly adjusted, and the application does not limit this.

[0067] In addition, it should be noted that when the plate body 111 is made of an insulating material, the insulator 112 can be omitted. The battery management unit 02 can be disposed inside the plate body 111 by injection molding or compression molding process. Alternatively, at least a part of the plate body 111 can constitute the insulator 112.

[0068] In addition, as Figure 9 shown, in an embodiment provided by the application, the battery cover plate 11 can also include a positive pole column 113 and a negative pole column 114. The positive pole column 113 can be connected with the positive pole lug 131 of the bare battery cell 13, and the negative pole column 114 can be connected with the negative pole lug 132 of the bare battery cell 13. Alternatively, it can be understood that the electric energy of the bare battery cell 13 can be transmitted to the external power consumption equipment through the positive pole column 113 and the negative pole column 114. Alternatively, the external power generation equipment can supplement the electric energy to the bare battery cell 13 through the positive pole column 113 and the negative pole column 114.

[0069] In specific application, the structure and shape of the positive pole column 113 and the negative pole column 114 can be various.

[0070] For example, the positive pole column 113 and the negative pole column 114 can be cylindrical structure. Alternatively, the positive pole column 113 and the negative pole column 114 can also be conductive sheet or other shape structure, and the application does not limit the specific shape of the positive pole column 113 and the negative pole column 114.

[0071] In addition, the positive pole column 113 and the positive pole lug 131 can be connected by welding, abutting or screwing, etc. Correspondingly, the negative pole column 114 and the negative pole lug 132 can be connected by welding, abutting or screwing, etc. The application does not limit the connection mode between the positive pole column 113 and the positive pole lug 131 and the connection mode between the negative pole column 114 and the negative pole lug 132.

[0072] In addition, in a specific application, the battery management unit 02 can be connected with the positive pole 113 and the negative pole 114. When the positive pole 113 is connected with the positive tab 131 and the negative pole 114 is connected with the negative tab 132, the bare battery cell 13 can supply power to the battery management unit 02, so that an additional power supply or power supply device for supplying power to the battery management unit 02 can be avoided.

[0073] Of course, in other embodiments, the battery management unit 02 can not be connected with the positive pole 113 and the negative pole 114. The battery cover plate 11 can be provided with a conductive contact connected with the battery management unit 02. When the battery cover plate 11 covers the recess 121, the conductive contact can be connected with the positive tab 131 and the negative tab 132, so that the bare battery cell 13 can supply power to the battery management unit 02.

[0074] In addition, in some embodiments, the positive pole 113 and the positive tab 131 can also be connected through a fuse circuit (not shown in the figure). Specifically, the battery management unit 02 can be connected with the fuse circuit for controlling the connection or disconnection state between the positive pole 113 and the positive tab 131. When the battery management unit 02 and the battery management system 04 are in communication connection, the battery management unit 02 can make the positive pole 113 and the positive tab 131 in a connected state through the fuse circuit. When the communication between the battery management unit 02 and the battery management system 04 is disconnected, the battery management unit 02 can make the positive pole 113 and the positive tab 131 in a disconnected state through the fuse circuit to prevent the use of the battery 10 after the battery 10 is misused. The determination condition of whether the battery management unit 02 and the battery management system 04 are in communication connection can be set according to actual needs. For example, assuming that the communication connection between the battery management unit 02 and the battery management system 04 is continuous and uninterrupted. If there is no communication between the battery management unit 02 and the battery management system 04 within a preset time period (such as 2 seconds), it means that the communication between the battery management unit 02 and the battery management system 04 is disconnected.

[0075] Alternatively, assuming that the communication connection between the battery management unit 02 and the battery management system 04 is periodic (such as communication once every 5 seconds). Within a preset time period (such as 10 seconds), if there is at least one communication connection between the battery management unit 02 and the battery management system 04, it can be determined that the communication between the battery management unit 02 and the battery management system 04 is maintained. If there is no communication connection between the battery management unit 02 and the battery management system 04 within 10 seconds, it means that the communication between the battery management unit 02 and the battery management system 04 is disconnected.

[0076] Of course, in actual application, the determination condition whether the battery management unit 02 is in communication connection with the battery management system 04 can be reasonably set according to actual situation, and the present application does not limit this.

[0077] In the fuse circuit, a circuit switch can be included, that is, the communication or disconnection state between the positive post 113 and the positive tab 131 can be switched through the fuse circuit. Alternatively, a fuse can be included in the fuse circuit, that is, the fuse circuit can be disposable, and after the fuse circuit disconnects the connection state between the positive post 113 and the positive tab 131 (that is, after the fuse is blown), it cannot be restored. It can be understood that the present application does not limit the specific type of the fuse circuit.

[0078] In addition, the negative post 114 and the negative tab 132 can also be connected through a fuse circuit, which will not be described here.

[0079] It can be understood that the sensor assembly 03 also needs electric energy when it is working normally. The sensor assembly 03 is connected with the battery management unit 02, and the electric energy of the bare cell 13 can be transmitted to the sensor assembly 03 through the battery management unit 02.

[0080] In some embodiments, the battery management unit 02 can include a power supply control circuit (not shown in the figure), which can be used to turn on or off the power supply of the sensor assembly 03. For example, in specific applications, electric energy can be transmitted to the sensor assembly 03 without interruption, so that the sensor assembly 03 can continuously detect relevant parameters. Alternatively, through the power supply control circuit, electric energy can be intermittently transmitted to the sensor assembly 03, thereby effectively solving the problem of electric energy and ensuring the normal detection function of the sensor assembly 03.

[0081] In addition, in an example provided by the present application, the battery cover plate 11 can also include an explosion-proof structure 115 disposed on the plate body 111. Specifically, the explosion-proof structure 115 penetrates the outer surface 111a and the inner surface 111b of the plate body 111. When the air pressure in the groove 121 is too high, the explosion-proof structure 115 can achieve pressure relief to prevent the battery 10 from exploding and other adverse conditions.

[0082] In specific settings, the explosion-proof structure 115 can be a commonly known conventional structure such as an explosion-proof film or an explosion-proof valve, which will not be described here.

[0083] It can be understood that in the above examples, one battery 10 is taken as an example for illustrative description. In actual application, a plurality of batteries 10 can be arranged in groups.

[0084] For example, as Figure 10As shown, in one example provided in this application, a plurality of batteries 10 may be included, wherein each battery 10 includes a casing 12, a bare cell (not shown in the figure), and a battery cover 11. The plurality of batteries 10 can be connected in series or in parallel to meet the required power supply requirements. Alternatively, it can be understood that each battery 10 is independent of each other, and in practical applications, the number and placement of the required batteries 10 can be flexibly adjusted according to actual needs, thus providing good adaptability.

[0085] Or, such as Figure 11 As shown, in another example provided in this application, the housing 12 has multiple grooves 121 (eight are shown in the figure), and the multiple grooves 121 face the same direction. Each groove 121 can contain a bare battery cell (not shown) and a medium such as electrolyte, and the multiple bare battery cells can be connected in series or parallel. Furthermore, the battery cover 11 can simultaneously cover multiple grooves 121, thereby effectively reducing assembly difficulty and ease of manufacturing. When the battery cover 11 is configured, it can include multiple battery management units (not shown), sensor assemblies (not shown), and explosion-proof structures 115. Specifically, the number of grooves 121 (or bare battery cells) can be the same as the number of battery management units, sensor assemblies, and explosion-proof structures 115. The battery management unit, sensor assembly, and explosion-proof structure 115 in the battery cover 11 are configured one-to-one with the groove 121 (or bare cell), so that each groove 121 (or bare cell) is equipped with an independent battery management unit, sensor assembly, and explosion-proof structure 115, thereby enabling independent detection, control, or pressure relief for each bare cell, which is conducive to achieving refined management.

[0086] Of course, in specific applications, the number of battery management units may be less than the number of sensor components or recesses 121.

[0087] For example, the battery cover 11 may contain only one battery management unit, which can be connected to each sensor assembly and bare cell, thereby effectively reducing the number of battery management units and reducing the manufacturing cost of the battery cover 11.

[0088] It is understood that this application does not limit the number of battery management units.

[0089] In practical applications, the battery 10 provided in this application embodiment can be used in a variety of different application scenarios.

[0090] For example, such as Figure 12As shown, the embodiments of the present application further provide a power system 20, which can include an inverter 21, a power device 22 and any of the above-mentioned batteries 10. The power device 22 can be connected with the battery 10 through the inverter 21. Wherein, the type of the electric energy in the battery 10 is generally direct current, and the power consumption type of the power device 22 can be alternating current. The inverter 21 can be used to realize the conversion between alternating current and direct current.

[0091] In specific applications, the power device 22 can be a wind power device or a solar power device, etc. Alternatively, it can be understood that the power system 20 can be a wind power system or a solar power system.

[0092] In addition, in some embodiments, the power device 22 can also be an electric motor or other power consumption device, and the specific type of the power device 22 is not limited in the present application.

[0093] Alternatively, the battery 10 can be applied in a terminal such as a mobile phone, a vehicle, a ship, a drone or a base station, and also be used for power station energy storage or household energy storage, etc., and the application scenarios of the battery 10 are not limited in the present application.

[0094] In addition, the battery management system 04 can be arranged in the terminal or in the remote terminal. For example, when the battery 10 is applied in a vehicle, the battery management system 04 can be installed in the vehicle. Alternatively, the battery management unit 02 can also be arranged in a base station or other position. That is, after the battery management unit 02 is connected with the battery management system 04 through wireless communication, the arrangement position of the battery management system 04 can be adjusted according to the actual situation, thereby having higher flexibility.

[0095] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A battery, characterized by, The battery includes a shell, a bare cell, a battery management system and a battery cover plate, the shell has a recess, and the bare cell is arranged in the recess; The battery cover plate includes a plate body, a battery management unit, a sensor assembly, a positive pole and a negative pole; The plate body has an outer surface and an inner surface opposite to the outer surface; The battery management unit is arranged in the plate body, and the battery management unit has a transmission structure between the outer surface; The battery management unit includes a wireless communication module capable of being wirelessly connected with the battery management system through the transmission structure; The sensor assembly is connected with the battery management unit, wherein the sensor assembly is arranged in the plate body and protrudes from the inner surface; The battery cover plate covers the opening of the recess, the inner surface faces the recess, and the sensor assembly protrudes into the recess; The positive pole and the negative pole are arranged in the plate body; The bare cell includes a positive pole lug and a negative pole lug; The battery further includes a fuse circuit, the positive pole and the positive pole lug are connected through the fuse circuit, and / or the negative pole and the negative pole lug are connected through the fuse circuit; The battery management unit is further connected with the fuse circuit, and the battery management unit is used to disconnect the fuse circuit when the communication between the battery management unit and the battery management system is disconnected.

2. The battery of claim 1, wherein, The plate body has an insulator, and the battery management unit is located in the insulator.

3. The battery of claim 2, wherein, The insulator is located in the interior of the plate body, and one end of the transmission structure extends to the insulator.

4. The battery of claim 3, wherein, The transmission structure includes a slit or a blind hole.

5. The battery according to claim 3 or 4, characterized in that, The transmission structure is filled with an insulating material.

6. The battery of claim 5, wherein, The insulator and the insulating material filled in the transmission structure are integrally formed.

7. The battery of any one of claims 2 to 4, wherein the cathode comprises a cathode active material and a cathode binder, and the anode comprises an anode active material and an anode binder. One end of the insulator extends to the inner surface, and the sensor assembly is arranged in the insulator.

8. The battery of any one of claims 1 to 4, wherein, The plate body is made of an insulating material.

9. The battery of any one of claims 1 to 4, wherein, The sensor assembly includes at least one of a temperature sensor, a barometric pressure sensor or a gas sensor.

10. The battery of any one of claims 1 to 4, wherein, The battery management unit includes a power supply control circuit used to turn on or off the power supply of the sensor assembly.

11. The battery of any one of claims 1 to 4, wherein, The battery cover plate further includes an anti-explosion structure arranged in the plate body.

12. The battery of any one of claims 1-4, wherein, The battery management unit is electrically connected with the bare cell.

13. The battery of any one of claims 1-4, wherein, The shell has a plurality of recesses, the number of the sensor assemblies is the same as the number of the recesses, and the sensor assemblies are arranged one by one corresponding to the recesses.

14. A power system characterized by, The battery includes an inverter connected with the battery for converting alternating current into direct current and providing the direct current to the battery, or converting direct current from the battery into alternating current.

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