Battery cell, battery module, battery pack and energy storage system

Abstract

The utility model provides a battery cell, a battery module, a battery pack and an energy storage system, which relates to the technical field of batteries, wherein a BMS chip is connected to a pole of a corresponding battery cell; the BMS chip includes a power replenishment terminal, which is used to correspond to a power supply terminal of a power replenishment device, and replenish power for the underpowered battery cell corresponding to the BMS chip. The BMS chip can collect the voltage value of the corresponding battery cell and determine the underpowered battery cell. The power replenishment terminal of the BMS chip obtains power from the power replenishment terminal of the power replenishment device, and controls the power supply to the single underpowered battery cell connected to the BMS chip through the connection between the BMS chip and the corresponding battery cell pole. In this way, the BMS chip can determine the power of the battery cell according to the collected voltage value, and when the power of the battery cell is low, the power replenishment device can be used to supply power to the single underpowered battery cell, thereby realizing timely power replenishment of the battery cell.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery core, a battery module, a battery pack and an energy storage system. Background Art

[0002] Currently, battery cells are charged by connecting the battery to an external power source via a charging cable, and battery modules are charged by connecting the battery module to an external power source via a charging cable. However, there is a lack of technology to replenish the battery cells in time when it is determined that the battery cells are low on power. In particular, there is a lack of a solution to replenish the individual battery cells when the battery power in a battery module is low. Utility Model Content

[0003] Based on the above problems, the utility model provides a battery cell, a battery module, a battery pack and an energy storage system to realize timely charging of low-power battery cells.

[0004] The utility model embodiment discloses the following technical solution:

[0005] In a first aspect, the present application provides a battery cell, including: a BMS chip;

[0006] The BMS chip is electrically connected to the pole of the battery cell;

[0007] The BMS chip includes a power replenishment terminal, and the power replenishment terminal is used to correspond to the power supply terminal of the power replenishment device to replenish power for the battery cell.

[0008] Optionally, the power supplement terminal is wirelessly connected to the power supplement device for power supplement, and / or the power supplement terminal is wiredly connected to the power supplement device for power supplement.

[0009] Optionally, the power replenishment end is a power replenishment coil, and the power replenishment device is a wireless power replenishment device whose power supply end is a power supply coil.

[0010] Optionally, the power supplement end is a wired interface, and the power supplement device is a wired power supplement device corresponding to the power supply end and the wired interface.

[0011] Optionally, the power compensation end includes a power compensation coil and a wired interface, the power compensation device includes at least one of a wired power compensation device and a wireless power compensation device, the power supply end of the wireless power compensation device is a power supply coil, and the power supply end of the wired power compensation device corresponds to the wired interface.

[0012] Optionally, it further includes an indicating element, wherein the indicating element is connected to the BMS chip;

[0013] The indicating element is used to send a cell low-power indication signal when the voltage value of the cell collected by the BMS chip is less than a threshold value.

[0014] Optionally, it also includes: a shell, wherein the shell seals and encapsulates the battery cell.

[0015] Optionally, the housing is provided with an explosion-proof valve.

[0016] Optionally, the BMS chip is mounted on the housing.

[0017] In a second aspect, the present application further provides a battery module, comprising a plurality of battery cells and at least one BMS chip, wherein the battery cell adopts one of the above-mentioned battery cells;

[0018] Each BMS chip corresponds to one or more battery cell settings;

[0019] The BMS chip is electrically connected to the pole of each corresponding battery cell;

[0020] The BMS chip includes a power replenishment terminal, which is used to correspond to the power supply terminal of the power replenishment device to replenish power for the underpowered battery cell corresponding to the BMS chip.

[0021] Optionally, a processor is included, which is connected to the BMS chip included in the battery module, and is used to receive the voltage value collected by the BMS chip from the corresponding battery cell and the battery cell identification corresponding to the voltage value, and determine and display the low-power battery cell identification according to the voltage value.

[0022] Optionally, an indicator element is provided corresponding to each battery cell, and the indicator element is connected to a BMS chip corresponding to the battery cell;

[0023] The indicating element is used to send a cell low-power indication signal when the voltage value of the cell collected by the BMS chip is less than a threshold value.

[0024] Optionally, the BMS chip is installed in the housing of the battery cell or the battery module.

[0025] In a third aspect, the present application also provides a battery pack, which includes at least one battery module as described above.

[0026] In a fourth aspect, the present application also provides an energy storage system, which includes a new energy module, a DC / DC converter and at least one of the above-mentioned battery packs, wherein the new energy module is used to obtain direct current, the output end of the new energy module is connected to the input end of the DC / DC converter, and the output end of the DC / DC converter is connected to the battery pack.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The utility model provides a battery cell, a battery module, a battery pack and an energy storage system, wherein a BMS chip is connected to a pole of a corresponding battery cell; the BMS chip includes a power replenishment terminal, which is used to correspond to a power supply terminal of a power replenishment device, and replenish power for the underpowered battery cell corresponding to the BMS chip. The BMS chip can collect the voltage value of the corresponding battery cell and determine the underpowered battery cell. The power replenishment terminal of the BMS chip obtains power from the power replenishment terminal of the power replenishment device, and controls the power supply to the single underpowered battery cell connected to the BMS chip through the connection between the BMS chip and the corresponding battery cell pole. In this way, the BMS chip can determine the power of the battery cell according to the collected voltage value, and when the power of the battery cell is low, the power replenishment device can be used to supply power to the single underpowered battery cell, thereby realizing timely power replenishment of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A schematic diagram of the structure of a battery cell provided by the utility model;

[0031] Figure 2 A schematic diagram of the structure of a battery module provided by the utility model;

[0032] Figure 3 This is a schematic structural diagram of another battery module provided by the utility model.

[0033] Description of Figure Numbers

[0034] 1-battery cell; 11-housing; 12-pole; 13-explosion-proof valve; 14-BMS chip; 15-wired interface. DETAILED DESCRIPTION

[0035] As described above, currently battery cells are charged by connecting the battery to an external power source via a charging cable, and battery modules are charged by connecting the battery module to an external power source via a charging cable. However, there is a lack of technology to replenish the battery cells in a timely manner when it is determined that the battery cells are low on power. In particular, there is a lack of a solution to replenish the individual battery cells when the battery power in a battery module is low.

[0036] Based on the above problems, the utility model provides a battery cell, a battery module, a battery pack and an energy storage system, wherein a BMS chip is connected to the pole of the corresponding battery cell; the BMS chip includes a power replenishment terminal, which is used to correspond to the power supply terminal of the power replenishment device to replenish power for the underpowered battery cell corresponding to the BMS chip. The BMS chip can collect the voltage value of the corresponding battery cell and determine the underpowered battery cell. The power replenishment terminal of the BMS chip obtains power from the power replenishment terminal of the power replenishment device, and controls the power supply of the single underpowered battery cell connected to the BMS chip through the connection between the BMS chip and the corresponding battery cell pole. In this way, the BMS chip can determine the power of the battery cell according to the collected voltage value, and when the power of the battery cell is low, the power replenishment device can be used to supply power to the single underpowered battery cell, thereby realizing timely power replenishment of the battery cell.

[0037] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] See also Figure 1 A schematic diagram of the structure of a battery cell is shown. A battery cell includes: a BMS chip 14.

[0039] The BMS chip 14 is electrically connected to the pole 12 of the battery cell 1. The BMS chip 14 includes a power supply terminal, which is used to correspond to the power supply terminal of the power supply device to supply power to the battery cell.

[0040] Specifically, the BMS chip 14 refers to an integrated circuit chip in a battery management system (Battery Management System), which is used to monitor, protect and manage the battery. For example, it can monitor the voltage, current, temperature and other parameters of the battery, and can protect the battery from overvoltage, undervoltage, overcurrent, overtemperature and other conditions to ensure the safe operation of the battery, and can control the charging and discharging process of the battery to optimize the performance and life of the battery.

[0041] In one possible implementation, the signal acquisition end of the BMS chip 14 is connected to the pole 12 of the battery cell 1 to collect parameters such as the voltage value of the battery cell 1 and, at the same time, determine whether the battery cell 1 is in a low power state (for example, the voltage value is less than a threshold value). If the battery cell 1 is low in power, the power supply end of the BMS chip 14 is also used to obtain power from the power supply device and supply power to the battery cell 1 by connecting to the pole 12 of the battery cell 1.

[0042] In one possible implementation, Figure 1In the battery cell shown, the power replenishment end is wirelessly connected to the power replenishment device for power replenishment.

[0043] Exemplarily, when the power supply terminal is wirelessly connected to the power supply device for power supply, the power supply terminal is a power supply coil, and the power supply device is a wireless power supply device whose power supply terminal is a power supply coil.

[0044] Specifically, the signal acquisition end of the BMS chip 14 is connected to the pole 12 of the battery cell 1, and is used to collect parameters such as the voltage value of the battery cell 1. At the same time, the power supply end of the power replenishment coil of the BMS chip 14 is connected to the pole 12 of the battery cell 1, and is used to power the battery cell 1 through the pole 12 of the battery cell 1. The BMS chip 14 can determine whether the battery cell 1 is in a low power state (for example, the voltage value is less than a threshold value) based on the collected voltage value of the battery cell 1. If the battery cell 1 is low in power, the power supply end of the power replenishment coil is controlled to power the battery cell 1 (exemplarily, the BMS chip 14 can control the circuit between the power replenishment coil and the pole 12 of the battery cell 1), and the power replenishment coil obtains power by induction with the power supply coil of the wireless power replenishment device.

[0045] According to the above-mentioned battery cell, the BMS chip 14 in the present application determines the power of the battery cell 1 according to the collected voltage value, and when the power is low, the power replenishment coil and the power supply coil of the wireless power replenishment device can be induced to supply power to the battery cell 1, so as to realize timely power replenishment of the battery cell 1. In the case where there is a power supply coil in the wireless power replenishment device that can sense the power replenishment coil for power supply, the BMS chip 14 is provided with a power replenishment coil that can supply power to the battery cell 1. When the voltage value collected by the BMS chip 14 determines that the power of the battery cell 1 is low, the battery cell 1 is replenished in time without sending an alarm to the user, and then the user plugs in the power supply to charge the battery, saving manpower.

[0046] In another possible implementation, Figure 1 In the battery cell shown, the power replenishment end is connected to the power replenishment device by wire for power replenishment.

[0047] Exemplarily, when the power supplement terminal and the power supplement device are connected to each other by wire for power supplement, the power supplement terminal is a wired interface, and the power supplement device is a wired power supplement device in which the power supply terminal corresponds to the wired interface.

[0048] Furthermore, Figure 1 The battery cell shown may further include an indicator element, which is connected to the BMS chip 14 .

[0049] The indicating element is used to send out an under-power indication signal of the battery cell 1 when the voltage value of the battery cell 1 collected by the BMS chip 14 is less than a threshold value.

[0050] Exemplarily, the indicating element may be an indicator light, and of course may also be other indicating elements such as an early warning bell.

[0051] Exemplarily, when the voltage value of the battery cell 1 collected is less than a threshold value (the minimum value of the normal voltage range of the battery cell 1), the BMS chip 14 controls the indicating element to send an under-voltage indication signal of the battery cell 1. In another possible implementation, the indicating element may also be an under-voltage lamp, which lights up the under-voltage lamp according to whether the voltage value of the battery cell 1 collected by the BMS chip 14 is under-voltage compared with the threshold value.

[0052] In this way, it is possible to determine that the battery cell is under-powered based on the indicating element. The user can connect the external power supply via the wired interface. The BMS chip 14 is electrically connected to the pole 12 of the battery cell 1. The BMS chip 14 is provided with a wired interface 15. The electric energy of the external power supply is obtained through the wired interface 15 to supply power to the under-powered battery cell 1.

[0053] In another possible implementation, Figure 1 In the battery cell shown, the power replenishment end is connected to the power replenishment device wirelessly for power replenishment, and the power replenishment end is connected to the power replenishment device by wire for power replenishment.

[0054] Exemplarily, the power compensation end includes a power compensation coil and a wired interface, the power compensation device includes at least one of a wired power compensation device and a wireless power compensation device, the power supply end of the wireless power compensation device is a power supply coil, and the power supply end of the wired power compensation device corresponds to the wired interface.

[0055] Furthermore, Figure 1 The battery cell shown may further include an indicator element, which is connected to the BMS chip 14. The indicator element is used to send an under-power indication signal of the battery cell 1 when the voltage value of the battery cell 1 collected by the BMS chip 14 is less than a threshold value.

[0056] In this way, when there is no wireless power supply device, the user can follow the indication of the indicator element. When the indicator element sends an indication signal indicating that the battery cell 1 is under-powered, the user can insert the charging cable plug of the wired power supply device (such as a power source, a battery, etc.) into the wired interface 15 of the BMS chip 14 of the battery cell 1 for charging. When there is a wireless power supply device, manpower is saved, and the power supply coil and the power supply coil of the wireless power supply device are directly inductively charged to charge the under-powered battery cell.

[0057] Based on the above-mentioned battery cell, it can also include a shell, and the shell seals and encapsulates the battery cell.

[0058] Exemplarily, the housing is provided with an explosion-proof valve, thereby improving the safety of the battery cell.

[0059] Exemplarily, the BMS chip can be installed in the housing for easy installation.

[0060] Furthermore, the BMS chip can be installed on the outside of the housing to facilitate users to inspect and maintain the BMS chip. Of course, it can also be installed at other positions of the housing.

[0061] See also Figure 2 The utility model provides a battery module, comprising a plurality of battery cells and at least one BMS chip, wherein the battery cell adopts the above-mentioned battery cell.

[0062] Each BMS chip corresponds to one or more battery cells; the BMS chip is electrically connected to the pole of each corresponding battery cell; the BMS chip includes a power replenishment terminal, which is used to correspond to the power supply terminal of the power replenishment device to replenish the underpowered battery cell corresponding to the BMS chip.

[0063] The BMS chip 14 refers to an integrated circuit chip in the battery management system (Battery Management System), which is used to monitor, protect and manage the battery. For example, it can monitor the voltage, current, temperature and other parameters of the battery, and can protect the battery from overvoltage, undervoltage, overcurrent, overtemperature and other conditions to ensure the safe operation of the battery, and can control the charging and discharging process of the battery to optimize the performance and life of the battery.

[0064] The BMS chip is connected to the corresponding pole cell of each battery cell, and the BMS chip can be connected to the corresponding positive and negative poles of each battery cell.

[0065] Exemplarily, the collection end of the BMS chip can be connected to the pole of each battery cell in a one-to-one correspondence to collect the parameters of the battery cell, and the output port of the power replenishment end of the BMS chip can be connected to the pole of each battery cell in a one-to-one correspondence, so that when the BMS chip determines that a battery cell is underpowered, the circuit between the output port corresponding to the underpowered battery cell and the pole of the underpowered battery cell can be turned on. After the power replenishment end of the BMS chip obtains power from the power replenishment device, it can supply power to the underpowered battery cell.

[0066] According to the above-mentioned battery module, the BMS chip can collect the voltage value of the corresponding battery cell, and can also supply power to the corresponding battery cell. The power supply end of the BMS chip obtains power from the power supply end of the power supply device, and controls the power supply to the single battery cell that is underpowered and connected to the BMS chip through the connection between the BMS chip and the corresponding battery cell pole. In this way, the BMS chip can determine the power of the battery cell according to the collected voltage value, and when the power is low, the power supply device can be used to supply power to the single battery cell that is underpowered, so as to realize timely power supply to the battery cell.

[0067] There are two situations in which each of the above-mentioned BMS chips 14 can correspond to one or more battery cells 1, which are introduced below respectively.

[0068] In the first case, each battery cell corresponds to a BMS chip 14, and the BMS chip collects the voltage value of the corresponding battery cell, and the charging end of the BMS chip is only connected to the pole of the battery cell for subsequent charging.

[0069] Specifically, when a BMS chip in the battery module detects that the voltage value of the corresponding battery cell is lower than the threshold and an undervoltage occurs, the power replenishment end of the BMS chip can obtain electrical energy from the power supply end of the power replenishment device, and then the power replenishment end will use the obtained electrical energy to replenish the battery cell connected to the BMS chip.

[0070] In the second case, each BMS chip 14 is provided corresponding to a plurality of battery cells 1 .

[0071] Exemplarily, each BMS chip 14 is electrically connected to the poles of the corresponding multiple battery cells 1 one by one, and is used to obtain the voltage value of each battery cell, and obtain electric energy from the charging device through the charging terminal to charge the corresponding under-powered battery cell.

[0072] Exemplarily, the BMS chip 14 is connected to multiple battery cells 1 in a one-to-one correspondence, and is used to collect parameters such as the voltage value of each connected battery cell 1. At the same time, a connection circuit is provided between the power supply end of the BMS chip and the poles of the multiple battery cells in a one-to-one correspondence. A switch for controlling the conduction of the connection circuit can be provided on the connection circuit, and the control end of the switch is connected to the control of the BMS chip. Thus, the BMS chip can collect the voltage value of each battery cell, and when it determines that the voltage value of the undervoltage (underpowered) battery cell is less than the threshold, it controls the conduction of the connection circuit between the underpowered battery cell and the power supply end. After the power supply end of the BMS chip obtains power from the power supply device, it can supply power to the underpowered battery cell.

[0073] Based on the above-mentioned battery module, there are many possible implementation methods of the power supply end of the utility model.

[0074] In the first possible implementation, see Figure 2 A schematic diagram of the structure of a battery module is shown, in which a charging end is wirelessly connected to a charging device for charging.

[0075] Exemplarily, the power supplement end is a power supplement coil, and the power supply end of the power supplement device is a power supply coil.

[0076] Specifically, the charging coil of the BMS chip and the power supply coil of the charging device are induced to supply power to the under-powered battery cell 1, thereby realizing timely charging of the battery cell 1. In the case where there is a power supply coil that can sense the charging coil for power supply, the BMS chip 14 is provided with a charging coil that can supply power to the under-powered battery cell 1. When the voltage value collected by the BMS chip 14 determines that the power of the battery cell 1 is low, the battery cell 1 is promptly charged without sending an alarm to the user, and the user plugs in the power supply for charging, thereby saving manpower.

[0077] In the second possible implementation, see Figure 3 A schematic diagram of the structure of another battery module, wherein the charging end is connected to the charging device by wire for charging.

[0078] Exemplarily, the power supply end is a wired interface, and the power supply end of the power supply device is a wired charging plug corresponding to the wired interface.

[0079] Specifically, a wired interface is provided on the BMS chip, and the wired charging plug of the charging device (such as a battery or an external power source) is directly connected to prompt that the battery cell with low power has the wired interface to charge the battery cell with low power, and the structure is simple.

[0080] In a third possible implementation, the power supplement terminal is connected to the power supplement device wirelessly for power supplement, and the power supplement terminal is connected to the power supplement device via a wired connection for power supplement.

[0081] Exemplarily, the power compensation end includes a power compensation coil and a wired interface, the power compensation device includes at least one of a wired power compensation device and a wireless power compensation device, the power supply end of the wireless power compensation device is a power supply coil, and the power supply end of the wired power compensation device is a wired charging plug corresponding to the wired interface.

[0082] Specifically, the BMS chip is provided with a wired interface and a charging coil. When a wireless charging device is present, electric energy can be obtained by induction between the charging coil in the BMS chip 14 and the power supply coil in the wireless power supply device. Similarly, when there is no wireless charging device, the staff can connect the charging cable of the wired power supply device (such as a DC power supply or a battery, etc.) to the wired interface 15 of the BMS chip 14 where the under-powered battery cell 1 exists, and the BMS chip 14 controls the obtained electric energy to be transmitted to the under-powered battery cell 1.

[0083] Based on the BMS chip 14 being provided with the wired interface 15, the staff may determine the battery cell 1 that is under-powered by:

[0084] In a first possible implementation, the battery module of the present application may include a processor, which is connected to a BMS chip 14 included in the battery module, and is used to receive a voltage value collected by the BMS chip 14 from a corresponding battery cell 1 and a battery cell 1 identifier corresponding to the voltage value, and determine and display an underpowered battery cell 1 identifier based on the voltage value.

[0085] Specifically, each BMS chip 14 collects the voltage value of the corresponding battery cell 1, and the processor is connected to the BMS chip 14 included in the battery module. The BMS chip 14 sends the collected voltage value of each corresponding battery cell 1 and the battery cell 1 identification of the battery cell 1 (exemplarily, the identification of the battery cell 1 can be the position number of the battery cell 1 in the battery pack, and of course, a unique identification can be defined for each battery cell 1 in the battery pack in other ways) to the processor. The processor receives the voltage value of each battery cell 1 and the battery cell 1 identification corresponding to each voltage value. The processor compares the voltage value of each battery cell 1 with a threshold value (the threshold value is the minimum value in the voltage value range for normal operation of the battery cell 1, for example, the voltage value range for normal operation of the battery cell 1 is 2.8V-3.6V, and the threshold value is 2.8V). If the voltage value is lower than the threshold value, it is determined to be an under-powered battery cell 1 (for example, when the voltage value of the battery cell 1 is lower than 2.8V, the battery cell 1 is considered to be an under-powered battery cell 1) and the battery cell 1 identifier corresponding to the under-powered battery cell 1 is determined. The battery cell 1 identifier of the under-powered battery cell 1 can be displayed on the display screen of the processor itself or on an external display screen. Furthermore, when there is no wireless power supply device, the staff can connect the charging cable to the wired interface 15 of the BMS chip 14 of the under-powered battery cell 1 for charging according to the displayed battery cell 1 identifier of the under-powered battery cell 1.

[0086] In a second possible implementation, an indicator element is provided corresponding to each battery cell 1, and the indicator element is connected to the BMS chip 14 corresponding to the battery cell 1; the indicator element is used to send an under-power indication signal of the battery cell 1 when the voltage value of the battery cell 1 collected by the BMS chip 14 is less than a threshold value.

[0087] When there is no wireless power supply device, the user can follow the indication of the indicating element. When the indicating element sends an indication signal that the battery cell 1 is under-powered, the user can insert the charging cable plug of the wired power replenishing device (such as a power supply, a battery, etc.) into the wired interface 15 of the BMS chip 14 corresponding to the battery cell 1 under-powered indicated by the indicating element. The BMS chip 14 controls the wired interface 15 to transmit the electric energy obtained from the wired power replenishing device to the battery cell 1 under-powered (for example, the BMS chip 14 can control the circuit connected between the power supply end of the power replenishing coil and the pole of the battery cell 1 under-powered corresponding to the BMS chip 14 to be turned on).

[0088] Based on the above-mentioned battery module, a shell for sealing and encapsulating the battery cell 1 is arranged outside the battery cell 1 .

[0089] Furthermore, the BMS chip is installed in the housing of the battery cell or the battery module.

[0090] Furthermore, the shell of the battery cell is provided with an explosion-proof valve, so that each battery in the battery module is sealed and packaged, thereby improving the waterproof and explosion-proof properties of the battery cell.

[0091] In addition, based on the above-mentioned battery module, the present application also provides a battery pack, which includes at least one of the above-mentioned battery modules.

[0092] In addition, based on the above-mentioned battery pack, the present application also provides an energy storage system, which includes a new energy module, a DC / DC converter and at least one of the above-mentioned battery packs, the new energy module is used to obtain direct current, the output end of the new energy module is connected to the input end of the DC / DC converter, and the output end of the DC / DC converter is connected to the battery pack.

[0093] The power module can be a photovoltaic solar panel string, or a wind power module. The DC / DC converter is used to convert the voltage output by the new energy module into a supply voltage that can be accepted by the battery pack.

[0094] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0095] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery cell, characterized in that: include: BMS chip; The BMS chip is electrically connected to the pole of the battery cell; The BMS chip includes a power replenishment terminal, and the power replenishment terminal is used to correspond to the power supply terminal of the power replenishment device to replenish power for the battery cell.

2. The battery cell according to claim 1, characterized in that: The power supplement terminal is connected to the power supplement device wirelessly for power supplement, and / or the power supplement terminal is connected to the power supplement device via wire for power supplement.

3. The battery cell according to claim 1, characterized in that: The power supplement end is a power supplement coil, and the power supplement device is a wireless power supplement device whose power supply end is a power supply coil.

4. The battery cell according to claim 1, characterized in that: The power supplement end is a wired interface, and the power supplement device is a wired power supplement device whose power supply end corresponds to the wired interface.

5. The battery cell according to claim 1, characterized in that: The power compensation end includes a power compensation coil and a wired interface, the power compensation device includes at least one of a wired power compensation device and a wireless power compensation device, the power supply end of the wireless power compensation device is a power supply coil, and the power supply end of the wired power compensation device corresponds to the wired interface.

6. The battery cell according to claim 4 or 5, characterized in that: Also included is an indicator element, the indicator element is connected to the BMS chip; The indicating element is used to send a cell low-power indication signal when the voltage value of the cell collected by the BMS chip is less than a threshold value.

7. The battery cell according to claim 1, characterized in that: Also includes: A shell is used to seal and encapsulate the battery cell.

8. The battery cell according to claim 7, characterized in that: The housing is provided with an explosion-proof valve.

9. The battery cell according to claim 7, characterized in that: The BMS chip is mounted on the housing.

10. A battery module, characterized in that: It comprises a plurality of battery cells and at least one BMS chip, wherein the battery cell is a battery cell according to any one of claims 1 to 5 and 7 to 8; Each BMS chip corresponds to one or more battery cell settings; The BMS chip is electrically connected to the pole of each corresponding battery cell; The BMS chip includes a power replenishment terminal, which is used to correspond to the power supply terminal of the power replenishment device to replenish power for the underpowered battery cell corresponding to the BMS chip.

11. The battery module according to claim 10, characterized in that: The processor is connected to the BMS chip included in the battery module, and is used to receive the voltage value collected by the BMS chip from the corresponding battery cell and the battery cell identification corresponding to the voltage value, and determine and display the identification of the low-power battery cell according to the voltage value.

12. The battery module according to claim 10, characterized in that: Each battery cell is provided with an indicator element corresponding to the battery cell, and the indicator element is connected to the BMS chip corresponding to the battery cell; The indicating element is used to send a cell low-power indication signal when the voltage value of the cell collected by the BMS chip is less than a threshold value.

13. The battery module according to any one of claims 10 to 12, characterized in that: The BMS chip is installed in the housing of the battery cell or the battery module.

14. A battery pack, characterized in that: The battery pack comprises at least one battery module according to any one of claims 10-13.

15. An energy storage system, characterized in that: The energy storage system includes a new energy module, a DC / DC converter and at least one battery pack according to claim 14, wherein the new energy module is used to obtain direct current, the output end of the new energy module is connected to the input end of the DC / DC converter, and the output end of the DC / DC converter is connected to the battery pack.

Images