Battery cell acquisition board, battery module and energy storage system

Abstract

The utility model relates to the technical field of energy storage, in particular to a battery cell acquisition board, a battery module and an energy storage system. The battery cell acquisition board comprises a substrate, wherein a wireless communication module and at least two acquisition modules are arranged on the substrate; the metal connecting sheets are positioned on two opposite sides of the substrate, and the substrate is used for being fixedly connected with the battery cell pole columns of the single battery cells through the metal connecting sheets; the acquisition modules are respectively used for acquiring corresponding parameters of the connected single battery cells; and the wireless communication module is used for transmitting the corresponding parameters of the single cell to the slave control board or the master control board of the single cell. Therefore, not only can the collection limitation of voltage and temperature data be broken through, but also the risk hidden danger caused by improper connection or aging of a traditional line can be effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage, in particular to a battery cell collection plate, a battery module and an energy storage system. BACKGROUND

[0002] In the prior art, the battery pack collection plate collects a small amount of data, and adopts a wire harness to collect data, which leads to the risk of short circuit or aging of the line, poor contact, high failure rate, and cannot prevent the risk of the battery pack in all aspects. In addition, the line is relatively complex, so that it is difficult to troubleshoot when a fault occurs. In addition, the battery pack also needs to reserve space for wiring, increasing the size of the battery pack. Finally, the traditional collection plate needs to be welded after a plurality of battery cells form a module, affecting the production efficiency and the production automation process. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the present application provides a battery cell collection plate, a battery module and an energy storage system, which can effectively solve the problems of large volume, high failure rate and low safety of the prior art battery pack.

[0004] In a first aspect, the present application provides a battery cell collection plate, which comprises:

[0005] a substrate, wherein the substrate is provided with a wireless communication module and at least two collection modules;

[0006] a metal connecting piece located on opposite sides of the substrate, and the substrate is used to fixedly connect the cell pole of a single battery cell through the metal connecting piece;

[0007] each of the collection modules is used to collect the corresponding parameters of the connected single battery cell;

[0008] the wireless communication module is used to transmit the corresponding parameters of the single battery cell to a slave board or a master board of the single battery cell.

[0009] In some embodiments, the cell pole includes a positive pole and a negative pole; the metal connecting piece includes a first connecting piece and a second connecting piece located on opposite sides of the substrate;

[0010] the substrate is used to fixedly connect the positive pole of the single battery cell through the first connecting piece, and fixedly connect the negative pole of the single battery cell through the second connecting piece.

[0011] In some embodiments, each of the collection modules includes a sensor for collecting corresponding parameters, and the signal collection point of each sensor is arranged on the single battery cell or the battery cell collection plate;

[0012] The types of the sensors include at least two of a voltage sensor, an electrochemical impedance spectroscopy sensor, a temperature sensor, a strain sensor, and a gas pressure sensor.

[0013] In some embodiments, the signal collection point of the voltage sensor is arranged on the metal connecting piece.

[0014] The signal collection point of the electrochemical impedance spectroscopy sensor is arranged on the metal connecting piece.

[0015] The signal collection point of the gas pressure sensor is arranged on the surface of the core body where the core pole is located in the single battery cell.

[0016] The signal collection point of the temperature sensor is arranged on the metal connecting piece or the surface of the core body where the core pole is located in the single battery cell.

[0017] The strain sensor is attached to the surface of the core body of the single battery cell.

[0018] In some embodiments, a wire passing hole is arranged on the metal connecting piece; the gas pressure sensor is arranged between the wire passing hole and the single battery cell and attached to the surface of the single battery cell; and the connecting wire of the gas pressure sensor is connected to the wireless communication module through the wire passing hole.

[0019] In some embodiments, the substrate and the slave board are arranged in a plane parallel manner.

[0020] In some embodiments, the substrate further comprises a power supply circuit; the power supply circuit takes power from the single battery cell through the metal connecting piece to supply power to each module in the substrate.

[0021] In the second aspect, the embodiments of the present application provide a battery module, which comprises at least one single battery cell, and each single battery cell is provided with the cell collection board provided in the first aspect of the present application.

[0022] In some embodiments, a plurality of cell collection boards are integrated on the same PCB.

[0023] In the third aspect, the embodiments of the present application provide a power storage system, which comprises:

[0024] a master control board;

[0025] a plurality of slave boards, which are respectively connected to the master control board through a bus;

[0026] a plurality of battery modules, each of which corresponds to one slave board, wherein each battery module is the battery module provided in the second aspect of the present application.

[0027] Embodiments of the present application have the following beneficial effects:

[0028] The electric cell collecting board in the present application comprises a substrate, a wireless communication module and at least two collecting modules are arranged on the substrate; metal connecting pieces are arranged on opposite sides of the substrate, and the substrate is used to fixedly connect the cell poles of the single electric cell through the metal connecting pieces; each collecting module is used to collect the corresponding parameters of the connected single electric cell; and the wireless communication module is used to transmit the corresponding parameters of the single electric cell to the slave board or the master board of the single electric cell. The electric cell poles of the single electric cell are connected by the metal connecting pieces to realize the stable electrical connection between the electric cell collecting board and the single electric cell, and the wireless communication module is used to transmit the collected parameters externally, thereby reducing the occupied space of the single electric cell, and thus not only effectively solving the problems of large volume and high failure rate of the battery pack in the prior art, but also effectively reducing the risk hidden dangers caused by improper or aging of the traditional line connection; in addition, the types of the collected parameters are more, and the collection is no longer limited to the collection of voltage and temperature data, which is convenient for monitoring the safety of the electric cell from multiple aspects and improves the safety. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 A first structure schematic diagram of the electric cell collecting board of the embodiments of the present application is shown;

[0031] Figure 2 A second structure schematic diagram of the electric cell collecting board of the embodiments of the present application is shown;

[0032] Figure 3 A third structure schematic diagram of the electric cell collecting board of the embodiments of the present application is shown;

[0033] Figure 4 A fourth structure schematic diagram of the electric cell collecting board of the embodiments of the present application is shown;

[0034] Figure 5 A fifth structure schematic diagram of the electric cell collecting board of the embodiments of the present application is shown;

[0035] Figure 6 A structure schematic diagram of the electric cell module of the embodiments of the present application is shown;

[0036] Figure 7 A structure schematic diagram of the energy storage system of the embodiments of the present application is shown.

[0037] Main component symbol explanation:

[0038] 100 - battery cell acquisition board; 110 - base plate; 120 - wireless communication module; 130 - acquisition module; 140 - metal connecting piece;

[0039] 200 - single battery cell; 210 - positive pole; 220 - negative pole; 131 - voltage sensor; 132 - electrochemical impedance spectroscopy sensor; 133 - temperature sensor; 134 - air pressure sensor; 135 - strain sensor; 1351 - strain signal transmission line; 141 - first connecting piece; 142 - second connecting piece; 143 - wire passing port; 300 - master control board; 400 - slave control board. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments of the present application.

[0041] The components of the embodiments of the present application generally described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0042] Hereinafter, the terms "include", "have", and their synonymous words used in various embodiments of the present application are only intended to indicate that specific features, numbers, steps, operations, elements, components, or combinations thereof are present, and should not be understood as excluding the existence or possibility of adding one or more features, numbers, steps, operations, elements, components, or combinations thereof. In addition, the terms "first", "second", "third", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0043] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present application belong. The terms (such as those defined in a generally used dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized or overly formal meaning, unless clearly defined in various embodiments of the present application.

[0044] Some embodiments of the present application will be described in detail below with reference to the drawings. The following embodiments and features of the embodiments described below can be combined with each other without conflict.

[0045] The battery cell acquisition board will be described below in combination with some specific embodiments.

[0046] Figure 1 A structural schematic diagram of the battery cell acquisition board of the embodiments of the present application is shown.

[0047] Exemplarily, the battery cell acquisition board 100 comprises a substrate 110, a wireless communication module 120, at least two acquisition modules 130, and a metal connecting piece 140, wherein the wireless communication module 120 and the at least two acquisition modules 130 are arranged on the substrate 110; the metal connecting piece 140 is arranged on opposite sides of the substrate 110, and the substrate 110 is used to fixedly connect the cell poles of the single battery cell 200 through the metal connecting piece 140; the metal connecting piece 140 is used to fixedly connect the substrate 110 and the cell poles of the single battery cell 200; in other words, the substrate 110 and the single battery cell 200 are fixedly welded together through the metal connecting piece 140. The above-mentioned metal connecting piece 140 arranged on opposite sides of the substrate 110 includes but is not limited to the metal connecting piece 140 arranged at both ends along the length direction of the substrate 110. It can be understood that the length direction of the substrate here refers to the direction parallel to the connecting line of the two cell poles of the single battery cell 200. In addition, the substrate of the embodiments is the main component of the acquisition board, and is mainly used to carry corresponding devices for parameter acquisition, for example, can be a printed circuit board (PCB board) and the like.

[0048] Each acquisition module 130 is used to acquire the corresponding parameters of the connected single battery cell 200. For example, the environment information of the single battery cell 200 and the electrical parameters of the single battery cell 200 are acquired.

[0049] The wireless communication module 120 is used to transmit the corresponding parameters of the single battery cell 200 to the master control board 300 or the slave control board 400 of the single battery cell 200.

[0050] Exemplarily, if each acquisition module 130 is used to acquire the environment information of the connected single battery cell 200 and the electrical parameters of the connected single battery cell 200, respectively, the wireless communication module 120 is used to transmit the acquired electrical parameters and environment information to the slave control board 400 or the master control board 300. The wireless communication module 120 in the present application has the functions of communication and control. The wireless communication module 120 is not limited to a wireless Bluetooth chip, and has the functions of communication and control.

[0051] In an embodiment, only the master control board 300 is provided in the energy storage system, and the slave control board 400 is not provided, and the wireless communication module 120 of the battery cell collection board 100 directly communicates with the master control board 300. In another embodiment, the master control board 300 and the slave control board 400 are provided in the energy storage system; each slave control board 400 includes a corresponding wireless communication module, and each slave control board 400 is connected to the wireless communication module 120 of the battery cell collection board 100 through the wireless communication module.

[0052] It can be understood that the present application realizes the collection of relevant parameters of the battery cell by integrating the collection board on the single battery cell 200, such as but not limited to, voltage, electrochemical impedance spectroscopy EIS, air pressure, temperature, and surface strain, and the like, thereby facilitating accurate evaluation of the health status of the single battery cell 200. The battery cell collection board 100 uses wireless communication technology to transmit data with the master control board 300 or the slave control board 400 of the battery, compared with the traditional collection method, the present application not only breaks through the limitation of collecting only two parameters of voltage and temperature, but also removes the wire harness collection method, effectively reduces the risk hidden danger caused by improper or aging of the line connection, and optimizes the internal structure of the battery module and the battery pack.

[0053] In an embodiment, the battery cell pole of the single battery cell 200 includes a positive pole 210 and a negative pole 220. As shown in Figure 2 The metal connecting piece 140 includes a first connecting piece 141 and a second connecting piece 142 located on opposite sides of the substrate 110.

[0054] The substrate 110 is used to fixedly connect the positive pole 210 of the single battery cell 200 through the first connecting piece 141, and fixedly connect the negative pole 220 of the single battery cell 200 through the second connecting piece 142.

[0055] Generally, the positive pole 210 and the negative pole 220 of the single battery cell 200 are located on the same surface of the core, at this time, the first connecting piece 141 and the second connecting piece 142 are respectively fixedly connected to the positive pole 210 and the negative pole 220 of the single battery cell 200, so that the substrate 110 is located between the positive pole 210 and the negative pole 220. Exemplarily, one end of the first connecting piece 141 is used to fixedly connect the positive pole 210 in a welding manner; the other end of the first connecting piece 141 is connected to one end of the substrate 110, and the other end of the substrate 110 is connected to one end of the second connecting piece 142, and the other end of the second connecting piece 142 is fixedly connected to the negative pole 220 in a welding manner.

[0056] In other words, the substrate 110 is fixed together with the single battery cell 200 through the metal connecting piece 140, and since the metal connecting piece 140 is directly connected with the cell pole, the corresponding sensors on the substrate 110 can directly collect the relevant parameters (such as voltage, temperature, etc.) of the single battery cell 200 through the metal connecting piece 140. Thus, the harness collection is reduced, the fixing device is reduced, the occupied space is reduced, and the volume of the entire structural design of the single battery cell 200 supporting the collection of multiple cell parameters is reduced.

[0057] For example, the metal connecting piece 140 can be a nickel sheet, that is, the first connecting piece 141 and the second connecting piece 142 each correspond to a nickel sheet. It can be understood that the size of the two connecting pieces can be determined according to the size of the two cell poles and the substrate, which is not limited here.

[0058] In an embodiment, each collection module 130 includes a sensor for collecting a corresponding parameter, and the signal collection point of each sensor is respectively arranged on the single battery cell 200 or the cell collection plate 100. Alternatively, each collection module 130 is in communication connection with the wireless communication module 120; or if a control module is arranged on the substrate 110, each collection module 130 can be connected with the control module, and then transmitted externally by the control module through the wireless communication module 120.

[0059] Among them, the type of the above-mentioned sensor can include at least two and more combinations of voltage sensor 131, electrochemical impedance spectroscopy sensor 132, temperature sensor 133, air pressure sensor 134 and strain sensor 135, etc. For example, including voltage sensor 131, electrochemical impedance spectroscopy sensor 132 and temperature sensor 133, or including voltage sensor 131, electrochemical impedance spectroscopy sensor 132, temperature sensor 133 and strain sensor 135, etc.

[0060] The voltage sensor 131 is used to collect voltage parameters, and in an embodiment, the signal collection point of the voltage sensor 131 is arranged on the metal connecting piece 140. It can be understood that the main structure for realizing signal processing and conversion, etc. in the voltage sensor 131 is arranged on the substrate 110, and the signal collection point is arranged on the metal connecting piece 140. In other words, the voltage sensor 131 collects the voltage signal of the single battery cell 200 through the collection point arranged on the metal connecting piece 140.

[0061] Exemplarily, the voltage sensor 131 includes but is not limited to a resistance voltage divider type voltage sensor, a capacitance voltage divider type voltage sensor, etc. For example, the resistance voltage divider type voltage sensor divides the voltage of the single battery cell 200 through a series resistance network, and outputs an analog electric signal proportional to the cell voltage.

[0062] The electrochemical impedance spectroscopy sensor 132 is used to collect the alternating current impedance signal. In an embodiment, the signal collection point of the electrochemical impedance spectroscopy sensor 132 is arranged on the metal connecting piece 140, in other words, the electrochemical impedance spectroscopy sensor 132 is specifically used to collect the alternating current impedance information of the single battery cell 200 through the collection point arranged on the metal connecting piece 140.

[0063] Exemplarily, based on the electrochemical impedance spectroscopy technology, the electrochemical impedance information is obtained by applying an alternating current excitation signal to the single battery cell 200, and collecting the response signal (such as the current response or the voltage response) of the single battery cell 200 under the alternating current excitation signal by the electrochemical impedance spectroscopy sensor 132, and then the impedance spectrum of the single battery cell 200 can be obtained through complex analysis and the like.

[0064] The air pressure sensor 134 is used to collect the air pressure of the single battery cell 200. In an embodiment, the signal collection point of the air pressure sensor 134 is arranged on the surface of the cell body where the cell pole is located in the single battery cell 200. The main structure of the air pressure sensor 134 for realizing signal processing and conversion and the like can be arranged on the substrate 110, or can be attached to the surface of the cell body where the cell pole is located in the single battery cell 200.

[0065] Exemplarily, as shown in Figure 3 , the metal connecting piece 140 is provided with a wire passing hole 143; the air pressure sensor 134 is between the wire passing hole 143 and the single battery cell 200, and is attached to the surface of the single battery cell 200. For example, the air pressure sensor 134 includes an air pressure parameter transmission line, and the metal connecting piece 140 is provided with a plurality of collection terminals, for example, including four collection terminals, and the air pressure parameter transmission line is welded with each collection terminal. Specifically, the air pressure parameter transmission line of the air pressure sensor 134 is connected in communication with the wireless communication module 120 through the wire passing hole 143 and the plurality of collection terminals. Exemplarily, the wire passing hole 143 includes but is not limited to a square, circular via hole and the like. The wire passing hole 143 is used for wiring, and the air pressure sensor 134 is arranged below the metal connecting piece 140, which can save space.

[0066] The temperature sensor 133 is used to collect the cell temperature of the single battery cell 200. Exemplarily, the signal collection point of the temperature sensor 133 is arranged on the metal connecting piece 140 or the surface of the cell body where the cell pole is located in the single battery cell 200. For example, in an embodiment, as shown in Figure 3 , the temperature sensor 133 is also arranged on the metal connecting piece 140, specifically, is arranged on the first connecting piece 141 and the second connecting piece 142 close to the positive pole 210 and the negative pole 220, respectively.

[0067] The strain sensor 135 is used to collect the strain signal of the surface of the single battery cell 200. For example, as shown in FIG. 1, the strain sensor 135 is arranged on the surface adjacent to the surface of the cell body where the cell pole is located. Figure 4 The strain sensor 135 includes a strain signal transmission line 1351, which is connected to the circuit on the substrate 110 and further connected to the wireless communication module 120.

[0068] It can be understood that the strain sensor 135 monitors the deformation of the surface of the single battery cell 200, thereby evaluating the mechanical stress change and structural integrity of the single battery cell 200 during the charging and discharging process. The above deformation can be caused by the volume expansion and contraction due to the internal chemical reaction of the battery cell, or the deformation caused by external mechanical pressure. Excessive strain can cause the battery cell shell to break, thereby causing serious safety accidents such as liquid leakage, short circuit, and even fire. By monitoring the strain data in real time, potential risks can be detected in advance and measures can be taken. The strain sensor 135 includes but is not limited to a strain gauge or a MEMS strain sensor. The strain sensor 135 converts the detected deformation signal into an electrical signal and into digitized strain data, which is transmitted to the slave board 400 or the master board 300 through the wireless communication module 120. In addition, the strain data can also be used to more accurately predict the remaining life (SOH, State of Health) and the remaining capacity (SOC, State of Charge) of the battery cell.

[0069] It can be understood that the position and deployment of the above-mentioned various sensors can be flexibly adjusted according to actual needs. For example, as shown in FIG. 1, the voltage sensor 131 is integrated on the substrate 110, the electrochemical impedance spectrum sensor 132 is integrated on the substrate 110, the air pressure sensor is also arranged on the substrate 110, and the strain sensor 135 is used to adhere to the surface of the single battery cell 200. In other words, the temperature sensor 133, the air pressure sensor 134, and the strain sensor 135, etc. These sensors can be directly attached to the surface of the cell body, or can be embedded on the substrate 110. Figure 5

[0070] In an embodiment, the substrate 110 further includes a power supply circuit; the power supply circuit takes power from the single battery cell 200 through the metal connecting piece 140 to supply power to each module in the substrate 110. Specifically, the power supply module is used to supply power to the wireless communication module 120 and each sensor. For example, as shown in FIG. 1, the power supply circuit mainly includes a voltage conversion module. The voltage conversion module is mainly used to step down the obtained battery cell voltage to the target voltage required by each module. It can be understood that if the required operating voltages of different modules are different, the voltage conversion module can include multiple stages and / or multiple paths of step-down units, which are not limited here.​

[0071] In order to ensure that the communication signal between the battery acquisition board 100 and the slave board 400 is good, in an embodiment, the substrate 110 is arranged in parallel with the slave board 400. Specifically, the surface of the substrate 110 on which the wireless communication module 120 and the acquisition module 130 are arranged is arranged in parallel with the surface of the slave board 400 on which the corresponding wireless communication module is arranged, so that the wireless communication module 120 on the substrate 110 is relatively parallel to the corresponding wireless communication module in the slave board 400, thereby ensuring that the communication signal is good.

[0072] Compared with the prior art, the battery acquisition board 100 is installed on the single battery 200, and a plurality of sensors are arranged on the battery acquisition board 100, so that more types of data such as voltage, temperature, EIS (electrochemical impedance spectrum data), air pressure, and strain can be acquired, thereby comprehensively monitoring the safety of the battery and improving the safety. Furthermore, the battery acquisition board 100 and the slave board 400 transmit the acquired parameter data in a wireless communication manner, without the need to arrange a wire harness, thereby reducing the size of the battery pack.

[0073] Figure 6 A structural schematic diagram of a battery module of an embodiment of the application is shown. Exemplarily, the battery module includes at least one single battery 200, and each single battery 200 is correspondingly provided with a battery acquisition board 100 as in the embodiment of the application.

[0074] Generally, a battery module can be formed by connecting a plurality of single batteries 200 in a series-parallel connection manner, so as to meet the requirements of different devices on voltage, capacity, and power of a battery system. Considering that each single battery 200 in a battery module can be provided with a corresponding battery acquisition board 100, as an optional solution, a plurality of battery acquisition boards 100 can also be integrated on the same PCB board. In other words, a plurality of battery acquisition boards 100 are integrated into one large acquisition board.

[0075] It can be understood that the optional items in the above embodiments are also applicable to the present embodiment, and thus are not repeatedly described herein.

[0076] Figure 7 A structural schematic diagram of an energy storage system of an embodiment of the application is shown. Exemplarily, the energy storage system includes a master control board 300, a plurality of slave boards 400, and a plurality of battery modules, wherein each slave board 400 is communicatively connected to the master control board 300 through a bus; each battery module corresponds to one slave board 400, and each battery module is the battery module of the foregoing embodiment.

[0077] Exemplarily, each slave board 400 is configured to manage the battery module corresponding to the communication connection, collect the voltage, current, temperature, air pressure and other parameters of the battery cells in the battery module through the respective cell acquisition board 100, monitor and manage the state of the battery module, and perform protection and charge balancing operations.

[0078] The master control board 300 is configured to communicate with the slave boards 400, collect the data of the single battery cells 200 and the battery modules uploaded by the slave boards 400, perform analysis and processing, realize centralized management and control of the entire energy storage system, and communicate with external devices or systems, receive instructions and feedback the state of the energy storage system. For example, the master control board 300 can be but not limited to in communication connection with the slave boards 400 in a daisy chain or CAN communication bus manner.

[0079] It can be understood that the optional items in the above embodiments are also applicable to the present embodiment, and thus will not be described herein. The above is merely a specific implementation 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 scope disclosed in the present application, which shall be encompassed within the protection scope of the present application.

Claims

1. An electric cell harvesting plate, characterized by, The electric core acquisition board comprises: a substrate provided with a wireless communication module and at least two acquisition modules; a metal connecting piece on opposite sides of the substrate, the substrate being used to fixedly connect the electric core pole of the single electric core through the metal connecting piece; each of the acquisition modules being used to acquire corresponding parameters of the connected single electric core; the wireless communication module being used to transmit the corresponding parameters of the single electric core to a slave board or a master board of the single electric core.

2. The cell harvester of claim 1, wherein, The electric core pole comprises a positive pole and a negative pole; the metal connecting piece comprises a first connecting piece and a second connecting piece on opposite sides of the substrate; the substrate being used to fixedly connect the positive pole of the single electric core through the first connecting piece and fixedly connect the negative pole of the single electric core through the second connecting piece.

3. The cell harvester of claim 1, wherein, Each of the acquisition modules comprises a sensor for corresponding parameter acquisition, and a signal acquisition point of each of the sensors is arranged on the single electric core or the electric core acquisition board; wherein the types of the sensors comprise at least two and above combinations of a voltage sensor, an electrochemical impedance spectrum sensor, a temperature sensor, a strain sensor and a gas pressure sensor.

4. The cell harvester of claim 3, wherein, The signal acquisition point of the voltage sensor is arranged on the metal connecting piece; The signal acquisition point of the electrochemical impedance spectrum sensor is arranged on the metal connecting piece; The signal acquisition point of the gas pressure sensor is arranged on a core surface of the single electric core where the electric core pole is located; The signal acquisition point of the temperature sensor is arranged on the metal connecting piece or on a core surface of the single electric core where the electric core pole is located; The strain sensor is used to be attached to a core surface of the single electric core.

5. The cell harvester of claim 4, wherein, A wire passing port is arranged on the metal connecting piece; the gas pressure sensor is arranged between the wire passing port and the single electric core and attached to a surface of the single electric core; a connecting line of the gas pressure sensor is connected with the wireless communication module through the wire passing port.

6. The cell harvester of claim 1, wherein, The substrate and the slave board are arranged in parallel.

7. The cell harvester of any one of claims 1-6, wherein, The substrate further comprises a power supply circuit; the power supply circuit takes power from the single electric core through the metal connecting piece to supply power to each module in the substrate.

8. A battery module, characterized by The battery module comprises at least one single electric core, and each single electric core is provided with the electric core acquisition board according to any one of claims 1-7.

9. The battery module of claim 8, wherein, A plurality of the electric core acquisition boards are integrated on the same PCB board.

10. An energy storage system characterized by, The energy storage system comprises: a master board; a plurality of slave boards respectively connected with the master board through a bus; a plurality of battery modules, each of which corresponds to a slave board, wherein each of the battery modules is the battery module according to claim 8 or 9.

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