Battery and battery pack

Abstract

A battery (10), used for cell data acquisition. The battery (10) comprises a cell (20), a case (30), a positive terminal (21), a negative terminal (23), a top cover (40), a wireless BMS module (51), and an electrical connector; the cell (20) is arranged inside the case (30); the positive terminal (21) and the negative terminal (23) are both electrically connected to the cell (20); the top cover (40) is connected to the case (30); the positive terminal (21) and the negative terminal (23) are connected to the top cover (40); part of the positive terminal (21) and part of the negative terminal (23) are located outside the case (30); the potential of the top cover (40) is the same as that of the negative terminal (23); a negative electrode area of the wireless BMS module (51) is capable of being connected to the top cover (40) to implement signal connectivity; the electrical connector is connected to the positive terminal (21). Cell data acquisition can be implemented, the integration of the battery can be improved, the stability of cell data acquisition can be improved, and then the working efficiency of cell data acquisition can be improved.

Description

Battery and battery pack

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202421203012.X, filed on May 29, 2024, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the field of batteries, in particular to a battery and a battery pack. BACKGROUND

[0004] With the increasing development of new energy vehicles, battery technology is constantly upgrading and iterating. As the service life of the batteries circulating in the market decreases, they will also face retirement. The working environment and conditions of power batteries in electric vehicles are very complex, and they need to face variable temperature and humidity environments all year round. In addition, due to different road conditions and driving methods, power batteries also need to adapt to the sudden changes in load at all times. The battery management system (BMS) is an important part of modern battery technology, and it plays a key role in electric vehicles and renewable energy storage systems. The main function of the BMS is to ensure that the battery pack operates in a safe and stable condition, prolongs its service life, and improves energy utilization efficiency. In order to accurately obtain the working condition of the power battery and implement the management strategy, the BMS needs to collect the voltage, working current, temperature and other information of each battery monomer and battery pack in real time through a sampling circuit. The BMS needs to integrate multiple functional modules and reasonably coordinate the communication operation between the modules, store some key data of the power battery, and maintain communication with the vehicle controller and the like. With the advent of the big data era, the BMS also needs to interact with the cloud platform in real time in order to better handle the management of power batteries and improve management quality.

[0005] For retired batteries, a wireless BMS method can quickly diagnose the health status of the battery cell. In the process of collecting information of the battery cell by the wireless BMS module, a good fixing method is needed to ensure the stability of information collection and the aesthetics of the appearance of the battery cell. The nickel sheet and the pole are commonly fixed together by laser welding to realize information collection in the market. However, when the nickel sheet is welded, the connection row and the battery cell pole are welded on the outer surface of the battery. The flatness of the pole cannot be guaranteed due to welding, and the pole may be welded or deformed, thereby reducing the stability of the data collected by the battery cell and the working efficiency. SUMMARY

[0006] Therefore, it is necessary to provide a battery to improve the stability of battery cell data acquisition and improve the working efficiency of battery cell data acquisition.

[0007] The battery provided by the application comprises:

[0008] a battery cell;

[0009] a shell, which is internally provided with the battery cell;

[0010] a positive electrode terminal;

[0011] a negative electrode terminal, wherein the positive electrode terminal and the negative electrode terminal are electrically connected to the battery cell;

[0012] a top cover, which is connected to the shell, the positive electrode terminal and the negative electrode terminal are connected to the top cover, a part of the positive electrode terminal and a part of the negative electrode terminal are located outside the shell, and the potential of the top cover is the same as that of the negative electrode terminal;

[0013] a wireless BMS module, which is arranged on the top cover, and a negative electrode area of the wireless BMS module is electrically connected to the top cover;

[0014] an electric connector, one end of which is electrically connected to the positive electrode terminal, and the other end of which is electrically connected to a positive electrode area of the wireless BMS module.

[0015] In an embodiment, the shell is a square shell, and the bottom of the shell is provided with an explosion-proof valve.

[0016] In an embodiment, the electric connector comprises a fixed block, an elastic member and a movable block, the fixed block, the elastic member and the movable block are all conductors, two ends of the elastic member are respectively connected to the fixed block and the movable block, the fixed block is connected to the positive electrode area, and the elastic force of the elastic member is used to keep the movable block in abutment with the positive electrode terminal.

[0017] In an embodiment, the electric connector is a top pin, the fixed block is a sleeve, the elastic member is a spring, and the movable block is a needle, wherein the spring is arranged in the sleeve, one end of the needle is connected to the spring, and the other end of the needle is connected to the positive electrode terminal, and the sleeve is fixed to the positive electrode area of the wireless BMS module.

[0018] In an embodiment, the spring arranged in the sleeve of the top pin is in a compressed state.

[0019] In an embodiment, the battery cell comprises a positive electrode lug, the positive electrode lug is arranged in the positive electrode terminal, the positive electrode terminal is provided with a mounting hole in the circumferential side, the needle extends into the positive electrode terminal from the mounting hole and is connected to the positive electrode lug in the positive electrode terminal.

[0020] In one embodiment, the battery further comprises an insulating piece, which is arranged between the wireless BMS module and the cell.

[0021] In one embodiment, the battery further comprises an insulating piece, which is arranged between the wireless BMS module and the top cover.

[0022] In one embodiment, a groove is formed on the top cover, the groove penetrates through two opposite sides of the top cover, the wireless BMS module is located in the groove, and the top surface of the wireless BMS module is flush with the top surface of the top cover.

[0023] In one embodiment, a limiting protrusion is arranged on the insulating piece, and the limiting protrusion is clamped into the wireless BMS module.

[0024] In one embodiment, the limiting protrusion is provided in four, and the four limiting protrusions are arranged at four azimuth angles of the insulating piece.

[0025] In one embodiment, two top pins are provided, the two top pins are arranged at intervals, and the two top pins are respectively connected to the positive terminal.

[0026] In one embodiment, the battery further comprises a conductive connecting sheet, and the negative area of the wireless BMS module is connected to the top cover through the conductive connecting sheet.

[0027] In one embodiment, the positive area of the wireless BMS module is provided with a solder pad, and the electrical connecting piece is connected to the wireless BMS module through the solder pad.

[0028] A battery pack comprising a battery.

[0029] In one embodiment, the battery pack comprises a box body, and the battery is arranged in the box body.

[0030] The battery provided in the present application comprises a cell, a shell, a positive terminal, a negative terminal, a top cover, a wireless BMS module, and an electrical connecting piece. The cell is arranged inside the shell. The positive terminal and the negative terminal are both electrically connected to the cell. The top cover is connected to the shell. The positive terminal and the negative terminal are connected to the top cover. Part of the positive terminal and part of the negative terminal are located outside the shell. The potential of the top cover is the same as that of the negative terminal. The negative area of the wireless BMS module can be connected to the top cover to realize signal communication. The electrical connecting piece is connected to the positive terminal to realize cell data collection. The conductive connecting sheet is used to connect the wireless BMS module and the battery tab, which can improve the integration of the battery and the stability of cell data collection, thereby improving the working efficiency of cell data collection. BRIEF DESCRIPTION OF DRAWINGS

[0031] The application will be further described below in conjunction with the accompanying drawings and embodiments, in which:

[0032] Fig. 1 is an axonometric view of a battery in an embodiment;

[0033] Fig. 2 is a top view of a battery in an embodiment;

[0034] Fig. 3 is an exploded view of a wireless BMS module of a battery in an embodiment;

[0035] Fig. 4 is an exploded view of a top pin of a battery in an embodiment.

[0036] Reference signs: battery 10; cell 20; positive terminal 21; negative terminal 23; shell 30; top cover 40; recess 41; wireless BMS module 51; solder pad 510; insulating piece 52; limiting protrusion 523; top pin 60; sleeve 61; needle 62; spring 63; conductive connecting piece 70. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the application more apparent, the specific embodiments of the application will be described in detail below in conjunction with the accompanying drawings. In the following description, a large number of specific details are set forth in order to fully understand the application. However, the application can be implemented in many different ways other than those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the application, therefore the application is not limited to the specific embodiments disclosed below.

[0038] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0039] In addition, the terms "first", "second", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered sequence. Thus, features defined with "first", "second" etc. can include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified. The terms "mounting", "connecting", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly specified. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0040] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0041] With the increasing global demand for sustainable energy and the rapid development of the electric vehicle market, battery technology, especially lithium-ion batteries, has become a hot research topic. However, in order to ensure the safe use of batteries and maximize their performance, the importance of battery management system (BMS) is increasingly prominent. The efficient operation of BMS is crucial to improve battery performance, ensure user safety, and achieve environmental protection goals. The core functions of BMS include real-time monitoring of battery status (such as voltage, current, temperature, etc.), assessment of battery health, balancing of battery cells, control of battery charging and discharging process, prediction of battery life, and protection of batteries from adverse conditions. BMS is mainly used to solve the safety and stability problems existing in early battery technology, especially with the application of electric vehicles and large-scale energy storage systems, the management requirements for batteries are more stringent and complex, which promotes the development of BMS technology. However, in the process of data acquisition of battery cell 20, the common method on the market is to fix the nickel sheet and the pole together by laser welding. When the nickel sheet is welded, the connection row and the battery pole are welded, and the flatness of the pole cannot be guaranteed, and the welding or deformation may occur. The present application provides a battery 10.

[0042] Referring to FIG. 1, the battery 10 provided by the embodiment of the application, the negative electrode of the wireless BMS module 51 can be connected with the battery cell 20 to realize signal communication, the electrical connection member is connected with the positive electrode lug of the battery cell 20, and the electrical connection member can realize data collection of the battery cell 20, the conductive connecting piece can be connected with the positive electrode lug of the battery cell 20 and the wireless BMS module 51 at the same time, and the conductive connecting piece can be connected with the battery lug inside the battery cell 20. Different from welding of the connecting row and the battery cell pole in the surface of the battery in the related art, the scheme can guarantee flatness of the pole, prevent the case of explosive welding or deformation, and improve stability of data collection of the battery cell 20. Meanwhile, the structure of the scheme sets the conductive connecting piece in the shell of the battery, which can improve integration of the battery 10 and further improve working efficiency of data collection of the battery cell 20.

[0043] With reference to FIGS. 1 and 2, the battery 10 includes the battery cell 20, the shell 30, the positive electrode terminal 21, the negative electrode terminal 23, the top cover 40, the wireless BMS module 51, and the electrical connection. The battery cell 20 is arranged inside the shell 30. The positive electrode terminal 21 and the negative electrode terminal 23 are both electrically connected to the battery cell 20. The top cover 40 is connected to the shell 30. The positive electrode terminal 21 and the negative electrode terminal 23 are connected to the top cover 40. Part of the positive electrode terminal 21 and part of the negative electrode terminal 23 are located outside the shell 30. The potential of the top cover 40 is the same as that of the negative electrode terminal 23. The battery cell 20 refers to a single electrochemical cell 20 containing a positive electrode and a negative electrode. In some embodiments, the shell 30 is a square shell. An explosion-proof valve is arranged at the bottom of the square shell battery cell 20. An explosion-proof valve is designed on the shell 30. When the pressure is too high, the explosion-proof valve can be damaged in time to release the pressure inside the battery and prevent the battery from exploding in thermal runaway. Specifically, the explosion-proof valve cuts off the current loop. When the pressure inside the battery further increases, the explosion-proof valve structure is damaged, releasing the pressure inside the battery and preventing the battery from exploding. The shell 30 adopts a square shell with an explosion-proof valve at the bottom, which can provide more space for the integration of the wireless BMS module 51. In some embodiments, the shell 30 is made of aluminum. In some embodiments, the positive electrode terminal 21 and the negative electrode terminal 23 of the battery cell 20 protrude from the top cover 40. The potential of the shell 30 is the same as that of the negative electrode terminal 23. The battery cell pole refers to the positive electrode and the negative electrode inside the battery cell 20. They are isolated from each other by the electrolyte and the separator, and are connected to the external circuit of the battery through the pole connector. In some embodiments, a resistor can be added to the positive electrode terminal 21. Since there is a certain difference between the potential of aluminum and the potential of the positive electrode of the battery, the shell 30 made of aluminum is prone to corrosion at the bottom. Direct conduction between the shell 30 made of aluminum and the positive electrode terminal 21 can eliminate the potential difference between them and avoid aluminum shell corrosion. The top cover 40 has two pole perforations corresponding to the positive electrode terminal 21 and the negative electrode terminal 23. The positive electrode terminal 21 passes through one of the pole perforations and is electrically connected to the top cover 40. The negative electrode terminal 23 passes through the other pole perforation and is electrically insulated from the top cover 40. A short-circuit component is arranged near the negative electrode terminal 23. When the internal pressure of the power battery increases, the short-circuit component acts upward to form a loop between the positive electrode and the negative electrode of the power battery, and a large current is generated in the loop, causing the connection component to melt and thereby cutting off the main loop. The positive electrode terminal 21 increases the resistance. A conductive plastic or silicon carbide is added between the top cover 40 of the shell 30 made of aluminum and the positive electrode terminal 21 of the battery to increase the conduction resistance between the aluminum shell and the positive electrode, thereby improving safety.In some embodiments, the wireless BMS module 51 is arranged on the top cover 40, the negative electrode area of the wireless BMS module 51 is electrically connected with the shell 30, the negative electrode of the wireless BMS module 51 can realize signal communication with the battery cell 20, one end of the top pin 60 is connected into the positive electrode terminal 21, and the other end is connected with the positive electrode area of the wireless BMS module 51, which can realize data collection of the battery cell 20, can improve the integration of the battery 10, reduce the connection line between the positive and negative electrodes of the wireless BMS module 51 and the positive and negative electrodes of the battery cell, and further improve the integration of the wireless BMS module 51. Different from the common way in the market that the nickel sheet and the pole are fixed together by laser welding to realize information collection, the above-mentioned way can realize data collection of the battery cell 20 at the same time, improve the integration of the battery 10, improve the stability of data collection of the battery cell 20, and further improve the working efficiency of data collection of the battery cell 20.

[0044] Referring to FIGS. 3 and 4, the electrical connecting piece includes a fixed block, an elastic piece, and a movable block, all of which are conductors. The two ends of the elastic piece are connected with the fixed block and the movable block, respectively. The fixed block is connected with the positive electrode area. The elastic force of the elastic piece is used to keep the movable block in abutment with the positive electrode terminal. In some embodiments, the electrical connecting piece is a top pin 60. Specifically, the fixed block is a sleeve 61, the elastic piece is a spring 63, and the movable block is a needle 62. In some embodiments, the top pin 60 includes the sleeve 61, the needle 62, and the spring 63. The spring 63 is arranged in the sleeve 61. One end of the needle 62 is connected with the spring 63, and the other end is connected into the positive electrode terminal 21. The sleeve 61 is fixed in the positive electrode area of the wireless BMS module 51. The top pin 60 adopts a double-sided structure. The spring 63 is arranged in the sleeve 61. When the top pin 60 is inserted into the electrode post hole, the spring 63 has a pre-pressing stroke, which can ensure that the top pin 60 and the electrode post hole are in good contact. The place where the positive electrode area of the wireless BMS module 51 is connected with the positive electrode terminal 21 of the battery cell 20 adopts the top pin 60. The spring 63 is arranged inside the top pin 60. The assembly of the wireless BMS module 51 by pre-pressing the top pin 60 can ensure the stability of information acquisition. In some embodiments, the top pin 60 can be a cylindrical top pin 60. In some embodiments, the top pin 60 can be arranged in parallel as two. The two top pins 60 are spaced apart by a distance, and the two top pins 60 are connected into the positive electrode terminal 21, respectively. The installation of the two top pins 60 can ensure the stability of signal acquisition. In some embodiments, the top pin 60 can be arranged in parallel as three. In some embodiments, the side of the top pin 60 away from the needle 62 is plated with copper and arranged as a flat structure, which is convenient for welding with the welding pad 510. In some embodiments, the top pin 60 is plated with copper, which can improve the conductivity of the top pin 60. In some embodiments, the spring 63 arranged in the sleeve 61 of the top pin 60 is in a compressed state. The compressed state of the spring 63 can ensure the good contact between the top pin 60 and the electrode post hole through the pre-pressing stroke generated by the compression of the spring 63 itself, which is conducive to improving the stability of data acquisition of the battery cell 20.

[0045] Referring to FIGS. 2 and 3, the battery cell 20 includes a positive electrode lug, the positive electrode lug is arranged in the positive electrode terminal, the mounting hole is arranged on the periphery of the positive electrode terminal, the needle head 62 of the needle 62 extends into the positive electrode terminal from the mounting hole, and the needle head 62 is connected with the positive electrode lug in the positive electrode terminal. In some embodiments, the positive electrode lug is arranged in the positive electrode terminal 21, the mounting hole is arranged on the periphery of the positive electrode terminal 21, the needle head 62 of the needle 60 extends into the positive electrode terminal 21 from the mounting hole, and the needle head 62 is connected with the positive electrode lug in the positive electrode terminal 21. The connection of the needle head 62 and the positive electrode lug can improve the integration of the battery 10, the proximity of the needle head 62 to the positive electrode can facilitate data collection and improve data collection efficiency. The needle head 62 of the needle 60 extends into the positive electrode terminal 21 through the mounting hole arranged on the periphery of the positive electrode terminal 21 and realizes the signal collection of the battery cell 20 in a pre-stroke manner. The positive electrode lug in the positive electrode terminal 21 is welded with the needle head 62 of the needle 60 inside the battery 10. Unlike the welding of the connecting row and the battery cell pole in the surface of the battery in the related art, the welding of the positive electrode lug in the positive electrode terminal 21 and the needle head 62 of the needle 60 can ensure the flatness of the pole and prevent the situation of explosive welding or deformation. The pre-stroke generated by the compression of the spring 63 can increase the stability of the needle 60, prevent poor contact caused by looseness, and improve the stability of the data collection of the battery cell 20. The mounting hole can more stably fix the position of the needle 60. In some embodiments, the needle head 62 of the needle 60 and the mounting hole are a detachable structure.

[0046] Referring to FIG. 1 and FIG. 3, the battery 10 further comprises an insulating piece 52, which is arranged between the wireless BMS module 51 and the cell 20, and in some embodiments, is arranged between the wireless BMS module 51 and the top cover 40. The wireless BMS module 51 is provided with a positive electrode area and a negative electrode area. The BMS battery management system (BATTERY MANAGEMENT SYSTEM) is commonly known as a battery nanny or a battery housekeeper, which is mainly used for intelligent management and maintenance of each battery cell, prevention of overcharging and overdischarging of the battery, prolongation of the service life of the battery, and monitoring of the state of the battery. The BMS battery management system unit comprises a BMS battery management system, a control module, a display module, a wireless communication module, an electrical device, a battery pack for supplying power to the electrical device, and an acquisition module for acquiring battery information of the battery pack. The BMS battery management system is connected with the wireless communication module and the display module through a communication interface. An output end of the acquisition module is connected with an input end of the BMS battery management system. An output end of the BMS battery management system is connected with an input end of the control module. The control module is connected with the battery pack and the electrical device. The BMS battery management system is connected with a server end through the wireless communication module. The wireless BMS module 51 is one of the core subsystems of the battery energy storage system, which is responsible for monitoring the operating state of each battery in the battery energy storage unit and ensuring safe and reliable operation of the energy storage unit. The wireless BMS module 51 can monitor and acquire the state parameters of the energy storage battery in real time (including but not limited to single battery voltage, battery pole temperature, battery loop current, battery pack terminal voltage, battery system insulation resistance, etc.), analyze and calculate the related state parameters as necessary, obtain more system state evaluation parameters, and realize effective management and control of the energy storage battery body according to a specific protection control strategy, so as to ensure safe and reliable operation of the entire battery energy storage unit. At the same time, the wireless BMS module 51 can exchange information with external other devices (PCS, EMS, fire extinguishing system, etc.) through its own communication interface and analog / digital input interface, form linkage control of each subsystem in the entire energy storage power station, and ensure safe, reliable, and efficient grid-connected operation of the power station. The top cover 40 is provided with a groove 41 penetrating through opposite sides of the top cover 40. The wireless BMS module 51 is located in the groove 41 and the top surface of the wireless BMS module 51 is flush with the top surface of the top cover 40. The insulating piece 52 is located in the groove 41 and is fixed to the shell 30. The insulating piece 52 can be made of plastic material and can be fixed in the groove 41 of the shell 30 by gluing. The insulating piece 52 can realize insulation and prevent short circuit. In some embodiments, the insulating piece 52 is provided with a limiting protrusion 523, which is clamped into the wireless BMS module 51.The limiting protrusions 523 serve a fixing function. In some embodiments, four limiting protrusions 523 can be provided, with each protrusion 523 positioned at one of the four azimuth angles of the insulating member 52 to fix the wireless BMS module 51 to the insulating member 52 in four directions. In some embodiments, the fixing method can be a conical snap-fit ​​fixing method. The wireless BMS module 51 is integrated with the top cover 40. The bottom of the wireless BMS module 51 is insulated using the insulating member 52. Moreover, the four positioning posts of the insulating member 52 not only serve a positioning function, allowing the wireless BMS module 51 to be positioned, but also facilitate the disassembly and maintenance of the wireless BMS module 51, improving the stability of data acquisition from the battery cell 20, and thus improving the working efficiency of data acquisition from the battery cell 20.

[0047] The negative terminal of the wireless BMS module 51 is connected to the top cover 40 via a conductive connecting piece 70. The positive terminal of the wireless BMS module 51 has a solder pad 510, and the ejector pin 60 is connected to the wireless BMS module 51 via the solder pad 510. The solder pad 510 is a basic component of surface mount assembly. In some embodiments, two solder pads 510 are reserved at the positive terminal of the wireless BMS module 51, and the ejector pin 60 is soldered to the solder pads 510 to connect the ejector pin 60 to the positive terminal of the battery cell, thus achieving signal acquisition. In some embodiments, the conductive connecting piece 70 is made of nickel sheet, and the positive terminal of the wireless BMS module 51 is fixed to the nickel sheet by welding. The nickel sheet is located on the side away from the wireless BMS module 51 and away from the ejector pin 60, allowing the wireless BMS module 51 to be directly fixed to the top cover 40 by laser welding, thereby achieving data acquisition. In some embodiments, since the housing 30 is charged, the voltage of the negative terminal 23 of the battery cell 20 and the housing voltage are at the same potential, ensuring that the information acquisition circuit is formed. Meanwhile, the electrified housing 30 improves the integration of the wireless BMS module 51 and reduces the wiring between the module's positive and negative terminals and the cell's positive and negative terminals. In some embodiments, the negative terminal of the wireless BMS module 51 is fixed to the pad 510 by soldering with nickel strips. Since the housing 30 is electrified, the voltage of the negative terminal of the cell's negative terminal is the same as the housing voltage. Therefore, the nickel strips led out from the module's negative terminal are used for signal acquisition via laser welding. The positive terminal of the wireless BMS module 51 is soldered to the spring 63 and the pin 60, which improves the integration of the battery 10, enhances the stability of data acquisition from the cell 20, and thus improves the efficiency of data acquisition from the cell 20.

[0048] The battery 10 provided by the embodiment of the application comprises a shell 30, a top cover 40, a wireless BMS module 51 and a thimble 60, the positive electrode terminal 21 and the negative electrode terminal 23 of the battery cell 20 protrude from the top cover 40, the potential of the shell 30 is the same as that of the negative electrode terminal 23, the negative electrode of the wireless BMS module 51 can be connected with the battery cell 20 to realize the communication of signals, the thimble 60 is connected with the positive electrode lug of the battery cell 20, the thimble 60 comprises a sleeve 61, a needle 62 and a spring 63, the spring 63 is arranged in the sleeve 61, one end of the needle 62 is connected with the spring 63, and the other end is connected into the positive electrode terminal 21, the sleeve 61 is fixed in the positive electrode area of the wireless BMS module 51, the thimble 60 adopts a double-sided structure, the spring 63 is arranged in the sleeve 61, when the thimble 60 is inserted into the battery cell pole hole, the spring 63 has a pre-pressing stroke, so that the thimble 60 and the pole hole can be in good contact, the place where the positive electrode area of the wireless BMS module 51 is connected with the positive electrode terminal 21 of the battery cell 20 adopts the thimble 60, and the spring 63 is arranged inside the thimble 60, the wireless BMS module 51 can be assembled by pre-pressing the thimble 60, so as to ensure the stability of information collection, two thimbles 60 can ensure the stability of signal collection, the thimble 60 is provided with two thimbles 60, the two thimbles 60 are arranged at intervals, the wireless BMS module 51 is integrated with the top cover 40, the bottom of the wireless BMS module 51 adopts an insulating piece 52, so that insulation can be realized, and the four positioning columns of the insulating piece 52 can play a role in positioning, in addition, the negative electrode area of the wireless BMS module 51 is fixed by soldering the nickel sheet and the solder pad 510 in a soldering manner, the positive electrode area of the wireless BMS module 51 is welded by soldering the spring 63 and the thimble 60, the structures such as the wireless BMS module 51, the thimble 60 and the shell 30 can realize the collection of battery cell 20 data, can improve the integration of the battery 10, improve the stability of battery cell 20 data collection, and further improve the working efficiency of battery cell 20 data collection. The battery pack provided by the embodiment of the application comprises a battery 10, the battery pack comprises a box body, the battery 10 is arranged in the box body, and the battery pack has the effect of stable data collection.

[0049] The technical features of the above embodiments can be combined in any manner, and to make the description concise, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist, they should be considered as the scope of the description.

[0050] The above embodiments only express several implementation manners of the application, the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the application, and these all belong to the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A battery for cell data acquisition, comprising: a cell; a shell, in which the cell is arranged; a positive terminal; a negative terminal, the positive terminal and the negative terminal are both electrically connected with the cell; a top cover, the top cover is connected with the shell, the positive terminal and the negative terminal are connected with the top cover, a part of the positive terminal and a part of the negative terminal are located outside the shell, the potential of the top cover is the same as the negative terminal; a wireless BMS module, arranged on the top cover, the negative area of the wireless BMS module is electrically connected with the top cover; an electrical connector, one end of the electrical connector is electrically connected with the positive terminal, the other end is electrically connected with the positive area of the wireless BMS module.

2. The battery of claim 1, wherein, The shell is a square shell, and the bottom of the shell is provided with an explosion-proof valve.

3. The battery of claim 1, wherein, The electrical connector comprises a fixed block, an elastic member and a movable block, the fixed block, the elastic member and the movable block are all conductors, the two ends of the elastic member are respectively connected with the fixed block and the movable block, the fixed block is connected with the positive area, and the elastic force of the elastic member is used to keep the movable block in abutment with the positive terminal.

4. The battery of claim 3, wherein, The electrical connector is a top pin, the fixed block is a sleeve, the elastic member is a spring, and the movable block is a needle, wherein the spring is arranged in the sleeve, one end of the needle is connected with the spring, the other end is connected into the positive terminal, and the sleeve is fixed in the positive area of the wireless BMS module.

5. The battery of claim 4, wherein, The spring arranged in the sleeve of the top pin is in a compressed state.

6. The battery of claim 4, wherein, The cell comprises a positive tab, the positive tab is arranged in the positive terminal, and the needle is arranged into the positive terminal from a mounting hole of the positive terminal and connected with the positive tab in the positive terminal.

7. The battery of claim 1, wherein, The battery further comprises an insulating member, which is arranged between the wireless BMS module and the cell.

8. The battery of claim 1, wherein, The battery further comprises an insulating member, which is arranged between the wireless BMS module and the top cover.

9. The battery of claim 7 or 8, wherein, A groove is arranged on the top cover, the groove penetrates through the opposite sides of the top cover, the wireless BMS module is located in the groove, and the top surface of the BMS module is flush with the top surface of the top cover.

10. The battery of claim 7 or 8, wherein, A limiting protrusion is arranged on the insulating member, and the limiting protrusion is clamped into the wireless BMS module.

11. The battery of claim 10, wherein, The limiting protrusion is provided in four, and the four limiting protrusions are respectively arranged at four azimuth angles of the insulating member.

12. The battery of claim 4, wherein, The top pin is provided with two, the two top pins are arranged at intervals, and the two top pins are respectively connected into the positive terminal.

13. The battery of claim 1, wherein, The battery further comprises a conductive connecting piece, and the negative area of the wireless BMS module is connected with the top cover through the conductive connecting piece.

14. The battery of claim 1, wherein, The positive area of the wireless BMS module is provided with a pad, and the electrical connector is connected with the wireless BMS module through the pad. 15.A battery pack, comprising the battery according to any one of claims 1-14.

16. The battery pack of claim 15, wherein, The battery pack comprises a box, and the battery is arranged in the box.

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