Battery cell top cover, battery cell, and battery pack

Abstract

The present application discloses a battery cell top cover, a battery cell, and a battery pack. The battery cell top cover comprises: a cover plate; at least two battery cell collection boards arranged at intervals on the side of the cover plate facing the battery cell, wherein collection devices are arranged on the battery cell collection boards and used for collecting data information of the battery cell; and an antenna passing through the cover plate and electrically connected to the battery cell collection boards, wherein the antenna is used for wirelessly transmitting to an external device the data information collected by the battery cell collection boards. In the battery cell top cover of the present application, the arranged at least two battery cell collection boards can collect data information of a battery cell at different positions of the battery cell, so as to obtain more comprehensive battery cell state information and wirelessly transmit the battery cell state information to an external device by means of an antenna, thereby providing reliable data support for battery cell state evaluation, fault diagnosis, and predictive maintenance, and improving the reliability of monitoring and early warning of a battery cell operating state.

Description

Cell top cover, cell and battery pack

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese patent application No. 2024229112004, filed on November 27, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of power battery technology, and in particular to a cell top cover, a cell, and a battery pack. Background Technology

[0004] In recent years, with the booming development of new energy vehicles, higher requirements have been put forward for the monitoring of power batteries.

[0005] Traditional BMS (Battery Management System) uses cables to transmit data collected from battery cells. This results in cables running between cells and between cells and the control device, placing a heavy load on the vehicle and affecting its driving range. Therefore, wireless BMS has emerged. Wireless BMS transmits data wirelessly, eliminating the need for cables weighing tens of kilograms, thus reducing weight and extending the vehicle's driving range. Furthermore, eliminating cables significantly reduces material and installation costs, which is of great significance for promoting the development of new energy vehicles.

[0006] In relevant wireless BMS architectures, a single acquisition module is typically used to collect cell information (such as pressure and temperature). However, since the acquisition module's acquisition range is limited to the surrounding space of the corresponding installation location, the information acquisition is somewhat limited, resulting in insufficient reliability of cell operating status monitoring and early warning.

[0007] Application content

[0008] The main purpose of this application is to propose a battery cell top cover, which aims to solve the technical problem that the acquisition module in the existing battery cell wireless BMS architecture has certain limitations in acquiring battery cell information and is insufficient in monitoring and early warning of battery cell working status.

[0009] To achieve the above objectives, this application proposes a battery cell top cover, which includes:

[0010] Cover plate;

[0011] At least two cell acquisition boards are spaced apart on the side of the cover plate facing the cell. The cell acquisition boards are equipped with acquisition devices for acquiring data information from the cell.

[0012] An antenna is inserted through the cover plate and electrically connected to the battery cell acquisition board. The antenna is used to transmit the data information acquired by the battery cell acquisition board to an external device.

[0013] In some embodiments, the cover plate is provided with a positive electrode post and a negative electrode post;

[0014] The at least two cell acquisition boards include a first cell acquisition board and a second cell acquisition board electrically connected to the first cell acquisition board, wherein the first cell acquisition board is electrically connected to the positive terminal and the second cell acquisition board is electrically connected to the negative terminal.

[0015] In some embodiments, the cover plate has a positive electrode pin on the side facing the battery cell that corresponds to the position of the positive electrode post. The positive electrode post passes through the cover plate and the positive electrode pin. The positive electrode pin is welded to the positive electrode post and forms a first solder mark.

[0016] In some embodiments, the first cell acquisition board is electrically connected to the positive electrode post by being electrically connected to the first solder mark.

[0017] In some embodiments, the first cell acquisition board is soldered to the first solder mark to electrically connect with the first solder mark and fix it to the cover plate.

[0018] In some embodiments, the first cell acquisition board is bonded to the first solder mark through a first conductive adhesive layer, so as to be electrically connected to the first solder mark and fixed to the cover plate.

[0019] In some embodiments, the cover plate has a negative electrode pin on the side facing the battery cell that corresponds to the position of the negative electrode post. The negative electrode post passes through the cover plate and the negative cathode. The negative electrode pin is welded to the negative electrode post and forms a second solder mark.

[0020] In some embodiments, the second cell acquisition board is electrically connected to the negative electrode post by being electrically connected to the second solder mark.

[0021] In some embodiments, the second cell acquisition board is welded to the second solder mark to electrically connect with the second solder mark and fix it to the cover plate.

[0022] In some embodiments, the second cell acquisition board is bonded to the second solder mark through a second conductive adhesive layer, so as to be electrically connected to the second solder mark and fixed to the cover plate.

[0023] In some embodiments, the cover plate is provided with a liquid injection port, and the top cover of the battery cell further includes a sealing cap disposed at the liquid injection port.

[0024] In some embodiments, the antenna includes an internal transmitting antenna and an external transmitting antenna, one end of the external transmitting antenna passing through the sealing cover, the other end of the external transmitting antenna being connected to the internal transmitting antenna, and the internal transmitting antenna being electrically connected to the battery cell acquisition board.

[0025] In some embodiments, the side of the cell acquisition board facing away from the cover plate is provided with a protective layer to prevent electrolyte corrosion.

[0026] This application also proposes a battery cell comprising a housing, a battery cell body located within the housing, and a battery cell top cover as described above, the battery cell top cover being disposed on the housing.

[0027] This application also proposes a battery pack comprising:

[0028] Box;

[0029] The main control board is located inside the enclosure;

[0030] Multiple battery cells, as described above, are arranged inside the housing, and the antennas of the multiple battery cells are communicatively connected to the main control board.

[0031] In the top cover of the battery cell in this application, at least two battery cell acquisition boards are spaced apart on the side of the cover facing the battery cell. They can collect data information of the battery cell (such as internal temperature and pressure) at different locations of the battery cell to obtain more comprehensive battery cell status information. The data is then wirelessly transmitted to external devices (such as the main control board of the battery module) through an antenna installed in the cover. This provides strong data support for battery cell status assessment, fault diagnosis and predictive maintenance, and can improve the reliability of battery cell working status monitoring and early warning. Attached Figure Description

[0032] Figure 1 is a schematic diagram of the structure of the top cover of the battery cell in one embodiment of this application;

[0033] Figure 2 is an exploded view of the top cover of the battery cell in the embodiment of Figure 1;

[0034] Figure 3 is a schematic diagram of the sealing cover structure of the top cover of the battery cell in the embodiment of Figure 1;

[0035] Figure 4 is a schematic diagram of the structure of the battery cell in one embodiment of this application. Detailed Implementation

[0036] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0039] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0040] Referring to Figure 1, which is a schematic diagram of the structure of the battery cell top cover 100 in one embodiment of this application:

[0041] This application provides a battery cell top cover 100, as shown in Figure 1. The battery cell top cover 100 includes:

[0042] Cover plate 110;

[0043] At least two cell acquisition boards 120 are spaced apart on the side of the cover plate 110 facing the cell. The cell acquisition board 120 is equipped with acquisition devices for acquiring data information of the cell.

[0044] Antenna 130 is installed through cover plate 110 and electrically connected to battery cell acquisition board 120. Antenna 130 is used to transmit data information acquired by battery cell acquisition board 120 to external devices.

[0045] As an important component in the cell structure, the top cover 100 of the cell is mainly set on the top of the cell shell to achieve sealing protection, prevent the electrolyte inside the cell from leaking, and prevent external space, moisture and other substances from entering the cell, thereby ensuring the stability of the internal chemical environment of the cell and maintaining the performance and life of the battery.

[0046] In the top cover 100 of the battery cell, the cover plate 110 may include a cover body and a partition. The cover body and the partition are arranged vertically along the height direction of the top cover of the battery cell. The cover body may be made of a metal material, such as aluminum alloy, which has a certain strength and corrosion resistance and can withstand the internal pressure of the battery cell and external impacts. The partition may be a plastic plate, used to isolate the cover body and its components, prevent short circuits, and ensure the safety and reliability of the battery cell.

[0047] The cell acquisition board 120 is disposed on the side of the cover plate 110 facing the cell, that is, when the cell top cover 100 is sealed on the cell housing, the cell acquisition board 120 is located inside the cover plate 110. Based on the structural composition of the cover body and the partition included in the cover plate 110, the cell acquisition board 120 may be located on the side of the partition facing away from the cover body. There are at least two cell acquisition boards 120, that is, there may be two, three or four cell acquisition boards 120, and this embodiment does not limit this. At least two cell acquisition boards 120 are arranged at intervals, for example, at least two cell acquisition boards 120 may be arranged sequentially at intervals along the length direction of the cover plate 110, including but not limited to this.

[0048] The battery cell acquisition board 120 can be a circuit board with an upper surface and a lower surface arranged opposite to each other. Acquisition devices are disposed on the upper surface of the battery cell acquisition board 120. Furthermore, corresponding circuits can be disposed on the upper surface of the battery cell acquisition board 120 to transmit and process the signal data acquired by the acquisition devices. The types of acquisition devices are varied, such as temperature sensors, pressure sensors, and components for voltage acquisition, to correspondingly acquire the temperature, pressure, voltage, and other status information of the battery cell. Moreover, one or more acquisition devices can be disposed on the battery cell acquisition board 120; this embodiment does not impose any limitation on this.

[0049] Antenna 130 passes through cover plate 110 and can be connected to cell acquisition board 120 via wire to achieve electrical connection. The main function of antenna 130 is to transmit the data information collected by cell acquisition board 120 to external devices (such as the main control board of battery module) to realize wireless BMS communication. To prevent electrolyte leakage and the ingress of external substances, rubber sealing rings or sealant can be used to fill and seal the gap between antenna 130 and cover plate 110.

[0050] In the battery cell top cover 100 of this embodiment, at least two battery cell acquisition boards 120 are spaced apart on the side of the cover plate 110 facing the battery cell. They can collect data information of the battery cell (such as internal temperature and pressure) at different locations of the battery cell to obtain more comprehensive battery cell status information. The data is then wirelessly transmitted to external devices (such as the main control board of the battery module) through an antenna installed in the cover plate 110. This provides strong data support for battery cell status assessment, fault diagnosis and predictive maintenance, and improves the reliability of battery cell working status monitoring and early warning.

[0051] In some embodiments, the cover plate 110 is provided with a positive terminal post 111 and a negative terminal post 112;

[0052] At least two cell acquisition boards 120 include a first cell acquisition board 121 and a second cell acquisition board 122 electrically connected to the first cell acquisition board 121. The first cell acquisition board 121 is electrically connected to the positive terminal 111, and the second cell acquisition board 122 is electrically connected to the negative terminal 112.

[0053] During battery use, the positive terminal 111 and negative terminal 112 on the cover 110 serve as current input and output channels. For example, when the battery cell is connected to an electrical device (such as a car motor), the positive terminal 111 outputs positive charge and the negative terminal 112 outputs negative charge, thus forming a current loop, enabling the chemical energy in the battery cell to be converted into electrical energy to power the electrical device.

[0054] The first cell acquisition board 121 is electrically connected to the positive terminal 111, and can acquire the potential difference V1 at the positive terminal. The second cell acquisition board 122 is electrically connected to the negative terminal 112, and can acquire the potential difference V2 at the negative terminal. The first cell acquisition board 121 and the second cell acquisition board 122 can be connected by wires to form a circuit. By calculating the potential difference V1 at the positive terminal and the potential difference V2 at the negative terminal, the voltage value of the cell can be obtained, so as to achieve accurate monitoring of the cell voltage state. If the cell voltage is too high or too low, the battery management system can take measures such as cutting off the charging or discharging circuit to prevent the cell from being overcharged or over-discharged, thereby avoiding safety accidents such as thermal runaway, combustion, and explosion of the battery.

[0055] Referring to Figures 1 and 2, Figure 2 is an exploded view of the cell top cover 100 in the embodiment of Figure 1:

[0056] In some embodiments, as shown in FIG2, a positive electrode pin 10 corresponding to the position of the positive electrode post 111 is provided on the side of the cover plate 110 facing the battery cell. The positive electrode post 111 passes through the cover plate 110 and the positive electrode pin 10. The positive electrode pin 10 is welded to the positive electrode post 111 and forms a first solder mark Y1.

[0057] The first cell acquisition board 121 is electrically connected to the first solder mark Y1, so as to be electrically connected to the positive terminal 111.

[0058] A positive electrode pin mounting area is provided on the side of the cover plate 110 facing the battery cell. The positive electrode pin mounting area is adapted to the positive electrode pin 10, and the positive electrode pin 10 is correspondingly attached to the positive electrode pin mounting area. In one embodiment, the positive electrode pin 10 is L-shaped and includes a first welding part 11 and a first electrical connection part 12 extending perpendicularly to the first welding part 11. The first electrical connection part 12 is used to connect to the battery cell body (such as the positive electrode tab of the battery cell body). The first welding part 11 is attached to the cover plate 110 and has a first welding hole adapted to the positive electrode post 111. The positive electrode post 111 passes through the first welding hole and is welded to the positive electrode pin 10, forming a ring of solder marks after welding, namely the first solder mark Y1. The first solder mark Y1 can be formed by laser welding the positive electrode post 111 and the positive electrode pin 10. Specifically, a high-energy-density laser beam irradiates the contact position between the positive electrode pin 10 and the positive electrode post 111. The metal material rapidly absorbs the laser energy, and the temperature rises sharply. Within a very short time, the metal material at the contact point is heated to a molten state, forming a molten pool. As the laser beam continues to act, the molten metal in the molten pool mixes and diffuses fully. When the laser beam stops irradiating, the molten metal in the molten pool begins to cool. During the cooling process, the molten metal gradually solidifies, making the positive electrode pin 10 and the positive electrode post 111 firmly connected together, and simultaneously forming the first solder mark Y1 at the welding position of the positive electrode pin 10 and the positive electrode post 111. On the side of the cover plate 110 facing the battery cell, the first battery cell acquisition board 121 is electrically connected to the first solder mark Y1 to achieve an electrical connection with the positive electrode post 111. Thus, the first cell acquisition board 121 does not need to be connected to the positive terminal 111 via a acquisition line, thereby avoiding faults such as sampling line breakage and improving the accuracy and effectiveness of voltage acquisition. Furthermore, the short signal transmission path reduces signal interference and improves signal transmission stability. In addition, the first cell acquisition board 121 can also acquire the temperature at the positive terminal pin 10 in real time, monitoring any abnormal conditions inside the cell.

[0059] The structural form in which the first battery cell acquisition board 121 and the first solder mark Y1 are electrically connected can include:

[0060] In some embodiments, the first cell acquisition board 121 is welded to the first solder mark Y1 to electrically connect with and fix it to the cover plate 110. The welding method can be ultrasonic welding, including but not limited to this. The first cell acquisition board 121 is connected to the first solder mark Y1 by welding, which not only achieves electrical connection with the first solder mark Y1, but also fixes it to the cover plate 110, resulting in a stable structure and stable voltage acquisition.

[0061] Alternatively, in some embodiments, as shown in FIG2, the first cell acquisition board 121 is bonded to the first solder mark Y1 via a first conductive adhesive layer D1, so as to electrically connect with the first solder mark Y1 and fix it to the cover plate 110. Specifically, the first conductive adhesive layer D1 is applied to the first solder mark Y1, and the first cell acquisition board 121 is then bonded to the first conductive adhesive layer D1. The first conductive adhesive layer D1 can be a metal conductive adhesive, such as silver conductive adhesive, etc. This is only an example and not a limitation. The first cell acquisition board 121 is bonded to the first solder mark Y1 with conductive adhesive, which not only achieves electrical connection with the first solder mark Y1, but also fixes it to the cover plate 110, resulting in a stable structure and stable voltage acquisition.

[0062] In some embodiments, as shown in FIG2, a negative electrode pin 20 corresponding to the position of the negative electrode post 112 is provided on the side of the cover plate 110 facing the cell. The negative electrode post 112 passes through the cover plate 110 and the negative electrode pin 20. The negative electrode pin 20 is welded to the negative electrode post 112 and forms a second solder mark Y2.

[0063] The second cell acquisition board 122 is electrically connected to the second solder mark Y2 to be electrically connected to the negative terminal 112.

[0064] A negative electrode pin mounting area is provided on the side of the cover plate 110 facing the battery cell. The negative electrode pin mounting area is adapted to the negative electrode pin 20, and the negative electrode pin 20 is correspondingly attached to the negative electrode pin mounting area. In one embodiment, the negative electrode pin 20 is L-shaped and includes a second welding part 21 and a second electrical connection part 22 extending perpendicularly to the second welding part 21. The second electrical connection part 22 is used to connect to the battery cell body (such as the negative electrode tab of the battery cell body). The second welding part 21 is attached to the cover plate 110 and has a second welding hole adapted to the negative electrode post 112. The negative electrode post 112 passes through the second welding hole and is welded to the negative electrode pin 20, forming a ring of solder marks after welding, namely the second solder mark Y2. The second solder mark Y2 can be formed by laser welding the negative electrode post 112 and the negative electrode pin 20. Specifically, a high-energy-density laser beam irradiates the contact position between the negative electrode pin 20 and the negative electrode post 112, causing the metal material to rapidly absorb the laser energy and its temperature to rise sharply. Within a very short time, the metal material at the contact point is heated to a molten state, forming a molten pool. As the laser beam continues to act, the molten metal in the molten pool mixes and diffuses fully. When the laser beam stops irradiating, the molten metal in the molten pool begins to cool. During the cooling process, the molten metal gradually solidifies, firmly connecting the negative electrode pin 20 and the negative electrode post 112 together, and simultaneously forming the second solder mark Y2 at the welding position of the negative electrode pin 20 and the negative electrode post 112. On the side of the cover plate 110 facing the battery cell, the second battery cell acquisition board 122 is electrically connected to the second solder mark Y2 to achieve an electrical connection with the negative electrode post 112. Thus, the second cell acquisition board 122 does not need to be connected to the negative terminal 112 via a sampling line, thereby avoiding faults such as sampling line breakage and improving the accuracy and effectiveness of voltage acquisition. Furthermore, the shorter signal transmission path reduces signal interference and improves signal transmission stability. In addition, the second cell acquisition board 122 can also acquire the temperature at the negative terminal pin 20 in real time, monitoring any abnormal conditions inside the cell.

[0065] The structural form in which the second battery cell acquisition board 122 and the second solder Y2 are electrically connected can include:

[0066] In some embodiments, the second cell acquisition board 122 is welded to the second solder mark Y2 to electrically connect with and fix it to the cover plate 110. The welding method can be ultrasonic welding, including but not limited to this. The second cell acquisition board 122 is connected to the second solder mark Y2 by welding, which not only achieves electrical connection with the second solder mark Y2, but also fixes it to the cover plate 110, resulting in a stable structure and stable voltage acquisition.

[0067] Alternatively, in some embodiments, as shown in FIG2, the second cell acquisition board 122 is bonded to the second solder mark Y2 via a second conductive adhesive layer D2, so as to electrically connect with the second solder mark Y2 and fix it to the cover plate 110. Specifically, the second conductive adhesive layer D2 is applied to the second solder mark Y2, and the second cell acquisition board 122 is then bonded to the second conductive adhesive layer D2. The second conductive adhesive layer D2 can be a metal conductive adhesive, such as silver conductive adhesive, etc. This is only an example and not a limitation. The second cell acquisition board 122 is bonded to the second solder mark Y2 with conductive adhesive, which not only achieves electrical connection with the second solder mark Y2, but also fixes it to the cover plate 110, making installation convenient and voltage acquisition stable.

[0068] Referring to Figures 1 to 3, Figure 3 is a schematic diagram of the structure of the sealing cover 140 of the cell top cover 100 in the embodiment of Figure 1:

[0069] In some embodiments, the cover plate 110 is provided with a liquid injection port K, and the top cover 100 of the battery cell also includes a sealing cap 140 provided at the liquid injection port K;

[0070] Antenna 130 includes an internal transmitting antenna 131 and an external transmitting antenna 132. One end of the external transmitting antenna 132 passes through the sealing cover 140, and the other end of the external transmitting antenna 132 is connected to the internal transmitting antenna 131. The internal transmitting antenna 131 is electrically connected to the battery cell acquisition board 120.

[0071] The liquid injection port K on the cover plate 110 is the inlet for adding electrolyte inside the battery cell. The sealing cap 140 is located at the liquid injection port K to seal the liquid injection port K. The sealing cap 140 can be an aluminum sealing element, or it can be called a sealing aluminum nail.

[0072] The antenna consists of an internal transmitting antenna 131 and an external transmitting antenna 132. The external transmitting antenna 132 passes through the sealing cover 140 and can be integrally formed with the sealing cover 140. The internal transmitting antenna 131 is located on the side of the cover plate 110 facing the battery cell. The battery cell acquisition board 120, the internal transmitting antenna 131, and the external transmitting antenna 132 are electrically connected in sequence. After the battery cell acquisition board 120 acquires the data information from the battery cell, it can transmit it to external devices via the internal transmitting antenna 131 and the external transmitting antenna 132. The internal transmitting antenna 131 and the external transmitting antenna 132 can be connected by methods such as welding or plugging, including but not limited to these. In specific assembly, the external transmitting antenna 132 and the internal transmitting antenna 131 can be connected first, then the sealing cover 140 can be placed on the liquid injection port K, and the sealing cover 140 can be welded to the cover plate 110 for sealing.

[0073] In this embodiment, the antenna 130 is integrated with the sealing cover 140 of the battery cell top cover 100, so there is no need to find another installation position on the cover plate 110 to install the antenna, which can reduce the installation space occupied and help improve the compactness of the battery cell structure.

[0074] In some embodiments, a protective layer for preventing electrolyte corrosion is provided on the side of the cell acquisition board 120 facing away from the cover plate 110. The protective layer may be a polypropylene (PP) layer or a polyethylene (PE) layer, etc., including but not limited to these. The protective layer prevents the electrolyte inside the cell from corroding the cell acquisition board 120 and the acquisition devices thereon, thus helping to extend the service life of the cell acquisition board 120.

[0075] Referring to Figure 4, which is a schematic diagram of the battery cell structure in one embodiment of this application:

[0076] This application also proposes a battery cell, as shown in FIG4. The battery cell includes a housing 200, a battery cell body located in the housing 200, and a battery cell top cover 100 as described in the foregoing embodiments. The battery cell top cover 100 is disposed on the housing 200. The specific structure of the battery cell top cover 100 is as described in the above embodiments. Since this battery cell adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0077] This application also proposes a battery pack, which includes:

[0078] Box;

[0079] The main control board is located in the enclosure;

[0080] Multiple battery cells, as described in the foregoing embodiments, are arranged in the housing and are communicatively connected to the main control board.

[0081] The specific structure of the battery cell is as described in the above embodiments. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the technical effects brought about by the technical solutions of the above embodiments, and will not be described in detail here.

[0082] The above description is only a part or preferred embodiment of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A battery cell top cover, wherein, include: Cover plate; At least two cell acquisition boards are spaced apart on the side of the cover plate facing the cell. The cell acquisition boards are equipped with acquisition devices for acquiring data information from the cell. An antenna is inserted through the cover plate and electrically connected to the battery cell acquisition board. The antenna is used to transmit the data information acquired by the battery cell acquisition board to an external device.

2. The cell top cover according to claim 1, wherein, The cover plate is provided with a positive electrode post and a negative electrode post; The at least two cell acquisition boards include a first cell acquisition board and a second cell acquisition board electrically connected to the first cell acquisition board, wherein the first cell acquisition board is electrically connected to the positive terminal and the second cell acquisition board is electrically connected to the negative terminal.

3. The cell top cover according to claim 2, wherein, The cover plate has a positive electrode pin on the side facing the battery cell that corresponds to the position of the positive electrode post. The positive electrode post passes through the cover plate and the positive electrode pin. The positive electrode pin is welded to the positive electrode post and forms a first solder mark.

4. The cell top cover according to claim 3, wherein, The first cell acquisition board is electrically connected to the first solder mark to be electrically connected to the positive electrode post.

5. The cell top cover according to claim 3, wherein, The first cell acquisition board is welded to the first solder mark to electrically connect with the first solder mark and fix it to the cover plate.

6. The cell top cover according to claim 3, wherein, The first cell acquisition board is bonded to the first solder mark through a first conductive adhesive layer, so as to be electrically connected to the first solder mark and fixed to the cover plate.

7. The cell top cover according to claim 2, wherein, The cover plate has a negative electrode pin on the side facing the battery cell, which corresponds to the position of the negative electrode post. The negative electrode post passes through the cover plate and the negative electrode pin. The negative electrode pin is welded to the negative electrode post and forms a second solder mark.

8. The cell top cover according to claim 7, wherein, The second cell acquisition board is electrically connected to the second solder mark to be electrically connected to the negative electrode post.

9. The cell top cover according to claim 7, wherein, The second cell acquisition board is welded to the second solder mark to electrically connect with the second solder mark and fix it to the cover plate.

10. The cell top cover according to claim 7, wherein, The second cell acquisition board is bonded to the second solder mark through the second conductive adhesive layer, so as to be electrically connected to the second solder mark and fixed to the cover plate.

11. The cell top cover according to claim 1, wherein, The cover plate is provided with a liquid injection port, and the top cover of the battery cell also includes a sealing cap disposed at the liquid injection port.

12. The cell top cover according to claim 11, wherein, The antenna includes an internal transmitting antenna and an external transmitting antenna. One end of the external transmitting antenna passes through the sealing cover, and the other end of the external transmitting antenna is connected to the internal transmitting antenna. The internal transmitting antenna is electrically connected to the battery cell acquisition board.

13. The cell top cover according to any one of claims 1 to 12, wherein, The side of the cell acquisition board facing away from the cover plate is provided with a protective layer to prevent electrolyte corrosion.

14. A battery cell, wherein, It includes a housing, a cell body located in the housing, and a cell top cover as described in any one of claims 1 to 13, the cell top cover being disposed on the housing.

15. A battery pack, wherein, include: Box; The main control board is located in the enclosure; Multiple battery cells as described in claim 14 are arranged in the housing, and the antennas of the multiple battery cells are communicatively connected to the main control board.

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