Energy storage device

Abstract

The invention provides energy storage equipment, and relates to the technical field of energy storage equipment, the energy storage equipment comprises a battery assembly, the battery assembly comprises at least two electrically connected battery units, and each battery unit comprises a battery cell; the battery management module is electrically connected with the battery cell, and under the condition that a circuit between the battery management module and the battery cell is conducted, the battery management module is started and generates a starting signal; and the linkage module is electrically connected with the battery management module and is used for controlling a circuit between the battery cells in other battery units electrically connected with the battery unit and the battery management module to be switched on under the condition that the starting signal is received.

Description

Technical Field

[0001] This application relates to the technical field of energy storage devices, and more particularly, to an energy storage device. Background Art

[0002] In the related art, energy storage devices adopt a modular design scheme, and the energy storage device can be expanded or reduced in capacity by increasing or decreasing the number of battery pack modules. To achieve low standby power consumption, the battery pack modules in the energy storage device will only enter the working state after receiving a start command.

[0003] When multiple battery pack modules are simultaneously provided in the energy storage device, if these battery unit packs need to discharge simultaneously, the user needs to manually power on these battery pack modules one by one, and the startup operation steps are cumbersome. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] To this end, this application proposes an energy storage device.

[0006] In view of this, this application provides an energy storage device, including: two electrically connected battery units, and the battery unit includes: a battery cell; a battery management module, the battery management module is electrically connected to the battery cell, and the battery management module is used to start and generate a start signal after being conducted with the battery cell; a linkage module, the linkage module is electrically connected to the battery management module, and is used to control the circuit conduction between the battery cell and the battery management module in other battery units electrically connected to the battery unit when receiving the start signal.

[0007] In this technical solution, multiple electrically connected battery units are provided in the battery assembly of the energy storage device. By increasing or decreasing the number of battery units, the total power of the battery assembly can be adjusted, so as to realize the expansion or reduction of the capacity of the energy storage device, thereby meeting different scenario requirements.

[0008] Among them, the multiple battery units in the battery assembly are modularly designed, and each battery unit is an independent functional module. After the energy storage device is deployed, in the non-working state, in order to reduce standby power consumption and reduce the power loss of the battery unit, the battery unit is in a sleep state, and at this time the battery unit cannot discharge externally.

[0009] When the energy storage device needs to be used, the user needs to manually operate the module switches on each battery unit one by one to control all the battery units to start one by one, resulting in cumbersome operations.

[0010] In view of the above problems, the battery unit in the technical solution of the present application includes a battery cell, a battery management module, and a linkage module. Among them, the number and capacity of the battery cells can be increased or decreased according to actual needs. When there are multiple battery cells, the multiple battery cells can be connected in series or in parallel.

[0011] The battery management module is specifically a BMS (Battery Management System). The battery management module can control the charging and discharging operations of the battery assembly and manage the health status of the battery at the same time.

[0012] When multiple battery units are connected to form a battery assembly, the linkage module is responsible for controlling the interconnection between multiple battery units.

[0013] Specifically, the battery management module is electrically connected to the battery cell. When the battery management module is in the working state, the battery management module obtains the electric energy required for work through the power supply signal output by the battery cell. When the battery unit is in the standby state, the circuit between the battery management module and the battery cell is cut off. At this time, the battery management module is in the power-down state, so it will not consume the electric energy stored in the battery cell, realizing low-power standby.

[0014] When the energy storage device needs to discharge externally, the battery assembly needs to wake up the battery units therein. When the user starts the device, in response to the start signal of the user turning on the machine, the circuit between the battery cell and the battery management module is controlled to conduct.

[0015] Exemplarily, a relay can be set between the battery cell and the battery management module, and the circuit between the battery cell and the battery management module is controlled to conduct or cut off through the relay.

[0016] Exemplarily, a switching tube can be set between the battery cell and the battery management module, and the circuit between the battery cell and the battery management module is controlled to conduct or cut off through the switching tube.

[0017] After the circuit between the battery cell of the current battery unit and the battery management module is conducted, the battery management module powers on and completes self-check. After the battery management module powers on and completes self-check, the current battery unit starts and is ready to discharge externally. At this time, the battery management module generates a start signal, and through the start signal, it controls the circuit between the battery cell and the battery management module in the next battery unit connected to the current battery to conduct. After the circuit between the battery cell and the battery management module in the next battery unit is conducted, the battery management module of this battery unit completes power-on self-check and generates a start signal to control the start of the next battery unit, and so on.

[0018] Exemplarily, the battery assembly includes battery pack A, battery pack B, and battery pack C. These battery packs are connected via the CAN bus. When the user starts the energy storage device to discharge externally, the user triggers the start switch. At this time, the BMS1 of battery pack A powers on and performs self-check. After the self-check of the BMS1 of battery pack A passes, the BMS1 of battery pack A generates start signal A, and controls the BMS2 of battery pack B to power on and perform self-check through start signal A. After the self-check of the BMS2 of battery pack B passes, the BMS2 of battery pack B generates start signal B, and controls the BMS3 of battery pack C to power on and perform self-check through start signal B. After the self-check of the BMS3 of battery pack C passes, the battery assembly is fully started, and at this time the energy storage device can discharge externally.

[0019] Through the technical solution of the present application, by setting a linkage module in the battery unit, after one battery unit in the battery assembly starts, this battery unit will control other battery units electrically connected to it to start, realizing the sequential start of multiple battery units. The user does not need to manually operate all battery units independently. Only one operation is required to control all battery units in the energy storage device to enter the discharge state, simplifying the operation steps of the start operation.

[0020] In addition, the energy storage device in the above technical solution provided by the present application may also have the following additional technical features:

[0021] In some technical solutions of the present application, optionally, the battery unit further includes: a first switching device, and the battery cell and the battery management module are electrically connected through the first switching device; when the first switching device is closed, the circuit between the battery management module and the battery cell is turned on; when the first switching device is open, the circuit between the battery management module and the battery cell is cut off.

[0022] In this technical solution, the battery cell and the battery management module are electrically connected through the first switching device, that is, the first switching device is serially arranged on the circuit between the battery cell and the battery management module.

[0023] When the first switching device is closed, the circuit between the battery cell and the battery management module is turned on. At this time, the battery cell supplies power to the battery management module, and the battery management module powers on and starts to work. When the first switching device is open, the circuit between the battery cell and the battery management module is cut off. At this time, the battery management module no longer receives the power supply signal from the battery cell, and the battery management module powers off and stops working.

[0024] Exemplarily, the first switching device is a relay.

[0025] Exemplarily, the first switching device is a switching tube.

[0026] The technical solution of this application controls the on / off of the circuit between the battery cell and the battery management module by setting a first switching device. When the energy storage device is on standby, the first switching device disconnects to cut off the circuit between the battery cell and the battery management module, and the battery management module no longer consumes power, which can reduce the standby power consumption.

[0027] In some technical solutions of this application, optionally, the energy storage device further includes: a second switching device, which is connected in parallel with the first switching device. When the second switching device is closed, the circuit between the battery management module and the battery cell is conducted.

[0028] In this technical solution, the second switching device is specifically the start switch of the energy storage device. The second switching device is connected in parallel with the first switching device. When the first switching device is disconnected, the circuit between the battery cell and the battery management module is cut off. At this time, if the user controls the second switching device to conduct, the circuit between the battery cell and the battery management module is conducted through the second switching device, and at this time the battery management module is powered on and starts to work.

[0029] After the battery management module completes the power-on self-check, the battery management module generates a start signal and controls the start of the next battery cell electrically connected to the current battery cell through the start signal until all the battery cells in the battery assembly are started.

[0030] Exemplarily, the second switching device is a reset switch.

[0031] Exemplarily, the second switching device is a self-locking switch.

[0032] The technical solution of this application controls the sequential start of multiple battery cells in the battery assembly through a total start switch, and the user only needs to operate once to control the start of all battery cells, which simplifies the operation steps of the start operation.

[0033] In some technical solutions of this application, optionally, the battery management module is further configured to generate a control signal for controlling the first switching device to close.

[0034] In this technical solution, when the user triggers the second switching device to control the power-on of the battery management module, after the battery management module completes the power-on self-check and the self-check passes, the current battery cell is in a state ready to discharge externally. At this time, the battery management module generates a control signal and sends it to the first switching device to control the first switching device to close through the control signal.

[0035] At this time, the circuit between the battery cell and the battery management module is conducted through the first switching device. Even if the second switching device is disconnected, the battery management module will not lose power, and the battery cell can work normally.

[0036] It can be understood that when a shutdown instruction is received, the battery management module generates a control signal again to control the first switching device to disconnect.

[0037] Taking the second switching device as a reset switch as an example, when the user triggers and presses the reset switch, the circuit between the battery cell and the battery management module is conducted through the second switching device, and the battery management module powers on for self-check. After the battery management module completes the power-on self-check, the battery management module controls the first switching device to close and issues a prompt. At this time, the user can release the reset switch to disconnect the second switching device, and the circuit between the battery management module and the battery cell is conducted through the first switching device.

[0038] The technical solution of this application controls the start of the battery unit through the second switching device. After the start of the battery unit is completed, the battery management module in the battery unit automatically controls the first switching device to close and generates a start signal to control the start of the next battery unit. The user only needs to perform one operation to complete the start of all battery units, simplifying the operation steps of the start operation.

[0039] In some technical solutions of this application, optionally, the energy storage device further includes: a control component, which is electrically connected to the battery component and is used to control at least one battery unit in the battery component to work. The second switching device is arranged on the control component.

[0040] In this technical solution, the control component is used to control the operation of the battery component, specifically to control one or more battery units in the battery component to work. Exemplarily, the control component can set the working mode of the battery component, such as setting the power threshold of each battery unit, or switching the charging and discharging states of the battery component, or setting the automatic shutdown time of the energy storage device, etc.

[0041] The second switching device is arranged on the control component. When installing and deploying the energy storage device, one battery unit in the battery component is directly connected to the control component, and other battery units are indirectly connected to the control component in a sequential connection manner.

[0042] When powering on, the user triggers the second switching device on the control component. At this time, the battery unit directly connected to the control component, assumed to be battery pack A, starts. After battery pack A starts, battery pack A continues to control battery pack B connected to battery pack A to start, and subsequent battery packs start sequentially.

[0043] The technical solution of this application simplifies the operation steps of the start operation by arranging the second switching device on the control component, and the user can control all the battery units in the battery component to start sequentially by operating the second switching device once.

[0044] In some technical solutions of the present application, optionally, the energy storage device further includes: a first operation module, the first operation module is disposed on the control component, and the first operation module is electrically connected to the second switching device, and is configured to control the second switching device to close when receiving a first power-on input.

[0045] In this technical solution, the first operation module is specifically the first operation module for controlling the second switching device to close. The first operation module may be a human-computer interaction module. Exemplarily, physical buttons are provided on the first operation module. Exemplarily, a touch screen is provided on the first operation module. Exemplarily, the first operation module may be a voice input module.

[0046] The first operation module is disposed on the control component. When installing and deploying the energy storage device, one battery unit in the battery assembly is directly connected to the control component, and the other battery units are indirectly connected to the control component in a sequential connection manner. The user can control multiple battery units to start sequentially through the first operation module on the control component at one time.

[0047] For example, physical buttons are provided on the first operation module. When the user inputs on the physical buttons, the first operation module generates a driving signal. After the second switching device receives the first driving signal, the second switching device closes. At this time, the battery cells in the battery unit are electrically connected to the battery management module. After the battery management module performs a power-on self-check, the battery unit completes startup and controls the next battery unit to start until all battery units complete startup.

[0048] The technical solution of the present application controls multiple battery units in the battery assembly to start sequentially through a total first operation module. The user only needs to perform one operation to control all battery units to start, which simplifies the operation steps of the startup operation.

[0049] In some technical solutions of the present application, optionally, the energy storage device further includes: a second operation module, the second operation module is disposed on the battery unit and is electrically connected to the second switching device, and is configured to control the second switching device to close when receiving a second power-on input, and control the battery management module to generate a stop startup signal, and the stop startup signal is used to instruct the linkage module to control the circuit between the battery cells and the battery management module in other battery units electrically connected to the battery unit to remain cut off.

[0050] In this technical solution, an independent second operation module is provided on each independent battery unit, and the second operation module is used to control the independent switch of a single battery unit. Specifically, the second operation module is specifically the second operation module for controlling the second switching device to close. The second operation module may be a human-computer interaction module. Exemplarily, the second operation module may be a physical button, a touch button, etc.

[0051] When the user triggers the second operation module, the second operation module controls the second switching device to close. At this time, the battery cells in the battery unit are electrically connected to the battery management module. After the battery management module powers on and performs self-check, the startup of the battery unit is completed. At the same time, it will also control the battery management module to generate a stop startup signal, and this custom-generated signal will prevent the linkage module from continuing to control the startup of the next battery unit. Therefore, it can achieve the independent startup of a single battery unit.

[0052] The technical solution of this application controls each battery unit in the battery assembly to start independently by setting up an independent second operation module. When the user needs to use the function of a single battery unit, it will not trigger the startup of other battery units, improving the flexibility of the energy storage device.

[0053] In some technical solutions of this application, optionally, the linkage module includes: a third switching device, which is electrically connected to the battery management module, and the startup signal is used to control the third switching device to close; among them, when the first battery unit is electrically connected to the second battery unit, the third switching device in the first battery unit is connected in parallel with the first switching device in the second battery unit. When the third switching device in the first battery unit is closed, the circuit between the battery management module and the battery cells in the second battery unit is turned on. At least two battery units include the first battery unit and the second battery unit.

[0054] In this technical solution, the linkage module includes a third switching device, and the third switching device can be connected in parallel with the first switching device in other battery units. Suppose battery pack A and battery pack B are electrically connected, then the third switching device in battery pack A is connected in parallel with the first switching device in battery pack B.

[0055] When battery pack A and battery pack B are in the sleep state, the circuits between the battery cells and the battery management module in both battery pack A and battery pack B are in the cut-off state. At this time, if the user performs a startup operation, then BMS1 in battery pack A powers on and performs self-check first. After BMS1 completes the power-on self-check, BMS1 generates a startup signal and controls the third switching device in battery pack A to close through the startup signal.

[0056] After the third switching device in battery pack A is closed, the circuit between the battery cells and the battery management module in battery pack B is turned on through the third switching device. At this time, BMS2 in battery pack B powers on and performs self-check. After BMS2 passes the power-on self-check, both battery pack A and battery pack B complete startup.

[0057] The technical solution of this application realizes the sequential startup of multiple battery units by means of parallel switching devices. The user only needs to perform one operation to control the startup of all battery units in the battery assembly, simplifying the operation steps of the startup operation.

[0058] In some technical solutions of the present application, optionally, the energy storage device further includes: a bus circuit, and at least two unit components are electrically connected through the bus circuit.

[0059] In this technical solution, the energy storage device includes a bus circuit, and multiple battery units in the battery assembly are electrically connected through the bus circuit. Exemplarily, the multiple battery units are connected in parallel through the bus circuit.

[0060] The technical solution of the present application realizes the electrical connection of multiple battery units through the bus circuit. Therefore, the energy storage device can freely increase or decrease the battery units in the battery assembly according to actual usage requirements, realizing free expansion or contraction, and improving the flexibility of the energy storage device.

[0061] In some technical solutions of the present application, optionally, the battery unit further includes: a voltage regulating module, the input end of the voltage regulating module is electrically connected to the battery cell, the output end of the voltage regulating module is electrically connected to the bus circuit, and the voltage regulating module is used to adjust the voltage value of the electrical signal output by the battery cell.

[0062] In this technical solution, the energy storage device can supply power to household electrical appliances in a user's home or electrical equipment in a production workshop. In some scenarios, such as for a photovoltaic energy storage device, the photovoltaic energy storage device can store the electric energy generated by photovoltaic power generation in the battery assembly and grid-connect to the mains power grid when the battery assembly has sufficient power.

[0063] In some embodiments, the voltage value of the electrical signal output by the battery unit is different from the voltage value required by the electrical equipment. Therefore, by setting the voltage regulating module, the voltage value of the electrical signal output by the battery assembly can meet the voltage requirements of the electrical equipment.

[0064] In some other embodiments, since the electrical signal during battery unit power generation is a direct current signal, in order to meet the power supply or grid-connection requirements, an inverter needs to be set to convert the direct current signal into an alternating current signal. Since the voltage value of the direct current signal output by the battery assembly does not necessarily match the input voltage range of the inverter, a voltage regulating module can be set to adjust the output voltage of the battery assembly.

[0065] Exemplarily, the voltage regulating module is a direct current voltage regulating module, that is, a DC / DC voltage regulating module.

[0066] The technical solution of the present application can make the voltage value of the discharge signal of the battery assembly meet the power consumption or grid-connection requirements by setting the voltage regulating module to adjust the output voltage of the battery assembly.

[0067] In some technical solutions of the present application, optionally, the battery unit further includes: a fourth switching device, the fourth switching device is arranged between the input end of the voltage regulating module and the battery cell, and is used to control the on / off of the circuit between the voltage regulating module and the battery cell.

[0068] In this technical solution, the battery cell includes a fourth switching device, which is connected in series to the circuit between the voltage regulating module and the battery cell. When the fourth switching device is turned off, the circuit between the battery cell and the voltage regulating module is cut off, and at this time, the battery cell cannot discharge externally.

[0069] When the fourth switching device is turned on, the circuit between the battery cell and the voltage regulating module is turned on, and at this time, the battery cell can discharge externally through the voltage regulating module.

[0070] The technical solution of this application can ensure the safety of the battery cell by setting the fourth switching device to control the on / off of the circuit between the voltage regulating module and the battery cell.

[0071] In some technical solutions of this application, the energy storage device further includes: a power supply module, which is electrically connected to the battery management module and the voltage regulating module and is used to supply power to the battery management module and the voltage regulating module.

[0072] In this technical solution, the power supply module is specifically a functional module for supplying power to the battery management module and the voltage regulating module. Specifically, the input end of the power supply module is electrically connected to the battery cell, the first output end of the power supply module is electrically connected to the battery management module, and the second output end of the power supply module is electrically connected to the voltage regulating module.

[0073] The power supply module can adjust the electrical signal of the battery cell discharge into an electrical signal suitable for supplying power to the battery management module and the voltage regulating module, so as to ensure that the battery management module and the voltage regulating module can work normally without being affected by the voltage fluctuation of the battery cell, and improve the reliability and stability of the battery cell and the energy storage device.

[0074] In some technical solutions of this application, optionally, the energy storage device further includes: a fuse device, which is connected in series with the fourth switching device.

[0075] In this technical solution, the fourth switching device is used to control the on / off of the circuit between the voltage regulating module and the battery cell. When a system failure occurs, the circuit between the battery cell and the voltage regulating module can be disconnected through the fourth switching device, thereby preventing the spread of faults such as overcurrent and overvoltage.

[0076] When a specific fault occurs, such as an instantaneous overcurrent being too large, the fourth switching device may not be able to disconnect the battery cell and the voltage regulating module in the first time. At this time, the fuse device can disconnect the battery cell and the voltage regulating module before the fourth switching device operates.

[0077] Exemplarily, the fuse device is a thermal fuse.

[0078] Exemplarily, the fuse device is an air circuit breaker.

[0079] The technical solution of the present application sets a fuse device at the output end of the battery cell. When a battery unit fails, the faulty battery unit can be cut off immediately, thereby ensuring the reliability and safety of the battery assembly and the energy storage device. Description of the Drawings

[0080] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:

[0081] Figure 1 The circuit diagram of the energy storage device showing some embodiments of the present application is shown;

[0082] Figure 2 The circuit diagram of the battery unit showing some embodiments of the present application is shown.

[0083] Reference Signs:

[0084] 10 Energy storage device, 100 Battery assembly, 102 Battery unit, GB Battery cell, 1022 Battery management module, 1023 Linkage module, K1 First switch device, K3 Third switch device, 1026 Voltage regulation module, K4 Fourth switch device, 1028 Power supply module, FU Fuse device, K2 Second switch device, 104 Control component, 105 First operation module, 106 Bus circuit, 107 Second operation module. Detailed Embodiments

[0085] In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.

[0086] Many specific details are set forth in the following description in order to fully understand the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below.

[0087] The following refers to Figure 1 and Figure 2 to describe the energy storage device according to some embodiments of the present application.

[0088] In some embodiments of the present application, an energy storage device is provided, including: at least two electrically connected battery units 102, where the battery unit 102 includes: a battery cell GB; a battery management module 1022, the battery management module 1022 is electrically connected to the battery cell GB, and the battery management module is configured to start and generate a start signal after the circuit between it and the battery cell GB is turned on; a linkage module 1023, the linkage module 1023 is electrically connected to the battery management module 1022, and is configured to control the conduction of the circuit between the battery cell GB and the battery management module 1022 in other battery units 102 electrically connected to the battery unit 102 when receiving the start signal.

[0089] In this embodiment, a plurality of electrically connected battery units 102 are provided in the battery assembly 100 of the energy storage device 10. By increasing or decreasing the number of battery units 102, the total power of the battery assembly 100 can be adjusted, so as to realize the expansion or contraction of the energy storage device 10, thereby meeting the requirements of different scenarios.

[0090] Among them, the multiple battery units 102 in the battery assembly 100 are modularly designed, and each battery unit 102 is an independent functional module. After the energy storage device 10 is deployed, in the non-working state, in order to reduce standby power consumption and reduce the power loss of the battery unit 102, the battery unit 102 is in a sleep state, and at this time the battery unit 102 cannot discharge externally.

[0091] When the energy storage device 10 needs to be used, the user needs to manually operate the module switches on each battery unit 102 one by one to control the start of all battery units 102 one by one, resulting in cumbersome operations.

[0092] To address the above problems, the battery unit 102 in the embodiments of the present application includes a battery cell GB, a battery management module 1022, and a linkage module 1023. Among them, the number and capacity of the battery cells GB can be increased or decreased according to actual needs. When the number of battery cells GB is multiple, the multiple battery cells GB can be connected in series or in parallel.

[0093] The battery management module 1022 is specifically a BMS. The battery management module 1022 can control the charging and discharging operations of the battery assembly 100 and manage the health status of the battery at the same time.

[0094] When a plurality of battery units 102 are connected to form a battery assembly 100, the linkage module 1023 is responsible for controlling the interlinkage between the plurality of battery units 102.

[0095] Specifically, the battery management module 1022 is electrically connected to the battery cell GB. When the battery management module 1022 is in the working state, the battery management module 1022 obtains the electric energy required for operation through the power supply signal output by the battery cell GB. When the battery unit 102 is in the standby state, the circuit between the battery management module 1022 and the battery cell GB is cut off. At this time, the battery management module 1022 is in the power-down state, so it will not consume the electric energy stored in the battery cell GB, achieving low-power standby.

[0096] When the energy storage device 10 needs to discharge externally, the battery assembly 100 needs to wake up the battery unit 102 therein. When the user starts the device, in response to the start signal of the user turning on the machine, the circuit between the battery cell GB and the battery management module 1022 is controlled to conduct.

[0097] Exemplarily, a relay can be set between the battery cell GB and the battery management module 1022, and the circuit between the battery cell GB and the battery management module 1022 is controlled to conduct or cut off through the relay.

[0098] Exemplarily, a switching tube can be set between the battery cell GB and the battery management module 1022, and the circuit between the battery cell GB and the battery management module 1022 is controlled to conduct or cut off through the switching tube.

[0099] After the circuit between the battery cell GB of the current battery unit 102 and the battery management module 1022 is conducted, the battery management module 1022 is powered on and completes self-check. After the battery management module 1022 is powered on and completes self-check, the current battery unit 102 starts and is ready to discharge externally. At this time, the battery management module 1022 generates a start signal, and through the start signal, it controls the circuit between the battery cell GB and the battery management module 1022 in the next battery unit 102 connected to the current battery to conduct. After the circuit between the battery cell GB and the battery management module 1022 in the next battery unit 102 is conducted, the battery management module 1022 of this battery unit 102 completes power-on self-check and generates a start signal to control the next battery unit 102 to start, and so on.

[0100] Exemplarily, the battery assembly 100 includes battery pack A, battery pack B, and battery pack C. These battery packs are connected through the bus CAN. When the user starts the energy storage device 10 to discharge externally, the user triggers the start switch. At this time, the BMS1 of battery pack A is powered on and self-checks. After the BMS1 of battery pack A passes the power-on self-check, the BMS1 of battery pack A generates a start signal A, and through the start signal A, it controls the BMS2 of battery pack B to power on and self-check. After the BMS2 of battery pack B passes the power-on self-check, the BMS2 of battery pack B generates a start signal B, and through the start signal B, it controls the BMS3 of battery pack C to power on and self-check. After the BMS3 of battery pack C passes the power-on self-check, the battery assembly 100 is fully started, and at this time, the energy storage device 10 can discharge externally.

[0101] In the embodiment of the present application, by providing a linkage module 1023 in the battery unit 102, after one battery unit 102 in the battery assembly 100 is started, this battery unit 102 will control the start of other battery units 102 electrically connected thereto, realizing the sequential start of multiple battery units 102. The user does not need to manually operate all the battery units 102 to start independently respectively, and only needs to perform one operation to control all the battery units 102 in the energy storage device 10 to enter the discharge state, simplifying the operation steps of the start operation.

[0102] In some embodiments of the present application, optionally, the battery unit 102 further includes: a first switching device K1, and the battery cell GB and the battery management module 1022 are electrically connected through the first switching device K1; when the first switching device K1 is closed, the circuit between the battery management module 1022 and the battery cell GB is conducted; when the first switching device K1 is open, the circuit between the battery management module 1022 and the battery cell GB is cut off.

[0103] In this embodiment, the battery cell GB and the battery management module 1022 are electrically connected through the first switching device K1, that is, the first switching device K1 is serially arranged on the circuit between the battery cell GB and the battery management module 1022.

[0104] When the first switching device K1 is closed, the circuit between the battery cell GB and the battery management module 1022 is conducted, and at this time, the battery cell GB supplies power to the battery management module 1022, and the battery management module 1022 is powered on and starts to work. When the first switching device K1 is open, the circuit between the battery cell GB and the battery management module 1022 is cut off, and at this time, the battery management module 1022 no longer receives the power supply signal from the battery cell GB, and the battery management module 1022 is powered off and stops working.

[0105] Exemplarily, the first switching device K1 is a relay.

[0106] Exemplarily, the first switching device K1 is a switching tube.

[0107] In the embodiment of the present application, by providing the first switching device K1 to control the on-off of the circuit between the battery cell GB and the battery management module 1022, when the energy storage device 10 is on standby, the first switching device K1 is open to cut off the circuit between the battery cell GB and the battery management module 1022, and the battery management module 1022 no longer consumes power, which can reduce the standby power consumption.

[0108] In some embodiments of the present application, optionally, the energy storage device 10 further includes: a second switching device K2, the second switching device K2 is connected in parallel with the first switching device K1, and when the second switching device K2 is closed, the circuit between the battery management module 1022 and the battery cell GB is conducted.

[0109] In this embodiment, the second switching device K2 is specifically the starting switch of the energy storage device 10. The second switching device K2 is connected in parallel with the first switching device K1. When the first switching device K1 is turned off, the circuit between the battery cell GB and the battery management module 1022 is cut off. At this time, if the user controls the second switching device K2 to be turned on, the circuit between the battery cell GB and the battery management module 1022 is turned on through the second switching device K2. At this time, the battery management module 1022 is powered on and starts to work.

[0110] After the battery management module 1022 completes the power-on self-check, the battery management module 1022 generates a start signal and controls the start of the next battery cell 102 electrically connected to the current battery cell 102 through the start signal until all the battery cells 102 in the battery assembly 100 are started.

[0111] Exemplarily, the second switching device K2 is a reset switch.

[0112] Exemplarily, the second switching device K2 is a self-locking switch.

[0113] In the embodiment of the present application, a total starting switch is used to control the sequential start of multiple battery cells 102 in the battery assembly 100. The user only needs to perform one operation to control the start of all the battery cells 102, which simplifies the operation steps of the starting operation.

[0114] In some embodiments of the present application, optionally, the battery management module 1022 is further configured to generate a control signal for controlling the first switching device K1 to close.

[0115] In this embodiment, after the user triggers the second switching device K2 to power on the battery management module 1022, when the battery management module 1022 completes the power-on self-check and the self-check passes, the current battery cell 102 is in a state ready to discharge externally. At this time, the battery management module 1022 generates a control signal and sends it to the first switching device K1 to control the first switching device K1 to close through the control signal.

[0116] At this time, the circuit between the battery cell GB and the battery management module 1022 is turned on through the first switching device K1. Even if the second switching device K2 is turned off, the battery management module 1022 will not lose power, and the battery cell 102 can work normally.

[0117] It can be understood that when a shutdown instruction is received, the battery management module 1022 generates a control signal again to control the first switching device K1 to open.

[0118] Taking the second switching device K2 as the reset switch as an example, when the user triggers and presses the reset switch, the circuit between the battery cell GB and the battery management module 1022 is turned on through the second switching device K2, and the battery management module 1022 powers on and performs self-check. After the battery management module 1022 completes the power-on self-check, the battery management module 1022 controls the first switching device K1 to close and issues a prompt. At this time, the user can release the reset switch to disconnect the second switching device K2, and the circuit between the battery management module 1022 and the battery cell GB is turned on through the first switching device K1.

[0119] In the embodiment of the present application, the battery unit 102 is started by controlling the second switching device K2. After the battery unit 102 starts successfully, the battery management module 1022 in the battery unit 102 automatically controls the first switching device K1 to close and generates a start signal to control the next battery unit 102 to start. The user only needs to perform one operation to complete the start of all battery units 102, which simplifies the operation steps of the start operation.

[0120] In some embodiments of the present application, optionally, the energy storage device 10 further includes: a control component 104, which is electrically connected to the battery component 100 and is used to control at least one battery unit 102 in the battery component 100 to work. The second switching device K2 is arranged on the control component 104.

[0121] In this embodiment, the control component 104 is used to control the battery component 100 to work, specifically to control one or more battery units 102 in the battery component 100 to work. Exemplarily, the control component 104 can set the working mode of the battery component 100, such as setting the power threshold of each battery unit 102, or switching the charging and discharging states of the battery component 100, or setting the automatic shutdown time of the energy storage device 10, etc.

[0122] The second switching device K2 is arranged on the control component 104. When installing and deploying the energy storage device 10, one battery unit 102 in the battery component 100 is directly connected to the control component 104, and the other battery units 102 are indirectly connected to the control component 104 in a sequential connection manner.

[0123] When starting up, the user triggers the second switching device K2 on the control component 104. At this time, the battery unit 102 directly connected to the control component 104, assumed to be battery pack A, starts. After battery pack A starts, battery pack A continues to control battery pack B connected to battery pack A to start, and subsequent battery packs start sequentially.

[0124] In an embodiment of the present application, by providing a second switching device K2 on the control component 104, a user can control all the battery cells 102 in the battery assembly 100 to start sequentially with a single operation on the second switching device K2, simplifying the operation steps of the start-up operation.

[0125] In some embodiments of the present application, optionally, the energy storage device 10 further includes: a first operation module 105, electrically connected to the second switching device K2, and configured to control the second switching device K2 to close upon receiving a first power-on input.

[0126] In this embodiment, the first operation module 105 is specifically the first operation module 105 configured to control the second switching device K2 to close. The first operation module 105 can be a human-machine interaction module. Exemplarily, physical buttons are provided on the first operation module 105. Exemplarily, a touch screen is provided on the first operation module 105. Exemplarily, the first operation module 105 can be a voice input module.

[0127] The user can control the battery cells 102 in the battery assembly 100 to start via the first operation module 105.

[0128] For example, physical buttons are provided on the first operation module 105. When the user inputs on the physical buttons, the first operation module 105 generates a drive signal. After the first drive signal is received by the second switching device K2, the second switching device K2 closes. At this time, the battery cell GB in the battery cell 102 is electrically connected to the battery management module 1022. After the battery management module 1022 performs a power-on self-check, the start-up of the battery cell 102 is completed, and the next battery cell 102 is controlled to start until the start-up of all the battery cells 102 is completed.

[0129] In an embodiment of the present application, a total of first operation module 105 controls multiple battery cells 102 in the battery assembly 100 to start sequentially. The user only needs to perform one operation to control the start-up of all the battery cells 102, simplifying the operation steps of the start-up operation.

[0130] In some technical solutions of the present application, optionally, the energy storage device 10 further includes: a second operation module 107, provided on the battery cell 102 and electrically connected to the second switching device K2, and configured to control the second switching device K2 to close upon receiving a second power-on input, and control the battery management module 1022 to generate a stop start signal, where the stop start signal is used to instruct the linkage module to control the circuit between the battery cell and the battery management module 1022 in other battery cells 102 electrically connected to the battery cell 102 to remain cut off.

[0131] In this technical solution, an independent second operation module 107 is provided on each independent battery cell 102, and the second operation module 107 is used to control the independent switching of a single battery cell 102. Specifically, the second operation module 107 is specifically a second operation module 107 for controlling the closing of the second switching device K2. The second operation module 107 can be a human-computer interaction module. Exemplarily, the second operation module 107 can be a physical button, a touch button, etc.

[0132] When the user triggers the second operation module 107, the second operation module 107 controls the second switching device K2 to close. At this time, the battery cells in the battery cell 102 are electrically connected to the battery management module 1022. After the battery management module 1022 performs a power-on self-check, the startup of the battery cell 102 is completed. At the same time, it will also control the battery management module 1022 to generate a stop startup signal, and this custom-generated signal will prevent the linkage module from continuing to control the startup of the next battery cell 102. Therefore, it is possible to control the independent startup of a single battery cell 102.

[0133] The technical solution of this application controls the independent startup of each battery cell 102 in the battery assembly by setting an independent second operation module 107. When the user needs to use the function of a single battery cell 102, it will not cause the linkage startup of other battery cells 102, improving the flexibility of the energy storage device 10.

[0134] In some embodiments of this application, optionally, the linkage module 1023 includes: a third switching device K3, the third switching device K3 is electrically connected to the battery management module 1022, and the startup signal is used to control the third switching device K3 to close; wherein, in the case where the first battery cell is electrically connected to the second battery cell, the third switching device K3 in the first battery cell is connected in parallel with the first switching device K1 in the second battery cell. When the third switching device K3 in the first battery cell is closed, the circuit between the battery management module 1022 and the battery cells GB in the second battery cell is turned on. At least two battery cells 102 include the first battery cell and the second battery cell.

[0135] In this embodiment, the linkage module 1023 includes a third switching device K3, and the third switching device K3 can be connected in parallel with the first switching device K1 in other battery cells 102. Assuming that battery pack A and battery pack B are electrically connected, the third switching device K3 in battery pack A is connected in parallel with the first switching device K1 in battery pack B.

[0136] When the battery packs A and B are in the sleep state, the circuits between the battery cells GB in the battery packs A and B and the battery management module 1022 are all in the cut-off state. At this time, if the user performs a start operation, the BMS1 in the battery pack A is powered on for self-check first. After the BMS1 completes the power-on self-check, the BMS1 generates a start signal and controls the third switching device K3 in the battery pack A to close through the start signal.

[0137] After the third switching device K3 in the battery pack A closes, the circuit between the battery cell GB in the battery pack B and the battery management module 1022 is conducted through the third switching device K3. At this time, the BMS2 in the battery pack B is powered on for self-check. After the BMS2 passes the power-on self-check, both the battery packs A and B complete the start-up.

[0138] The embodiment of the present application realizes the sequential start-up of multiple battery units 102 by means of parallel switching devices. The user only needs to perform one operation to control all the battery units 102 in the battery assembly 100 to start, simplifying the operation steps of the start-up operation.

[0139] In some embodiments of the present application, optionally, the energy storage device 10 further includes: a bus circuit 106, and at least two unit components are electrically connected through the bus circuit 106.

[0140] In this embodiment, the energy storage device 10 includes a bus circuit 106, and multiple battery units 102 in the battery assembly 100 are electrically connected through the bus circuit 106. Exemplarily, multiple battery units 102 are connected in parallel through the bus circuit 106.

[0141] The embodiment of the present application realizes the electrical connection of multiple battery units 102 through the bus circuit 106. Therefore, the energy storage device 10 can freely increase or decrease the battery units 102 in the battery assembly 100 according to actual usage requirements, realizing free expansion or contraction, and improving the flexibility of the energy storage device 10.

[0142] In some embodiments of the present application, optionally, the battery unit 102 further includes: a voltage regulating module 1026. The input end of the voltage regulating module 1026 is electrically connected to the battery cell GB, and the output end of the voltage regulating module 1026 is electrically connected to the bus circuit 106. The voltage regulating module 1026 is used to adjust the voltage value of the electrical signal output by the battery cell GB.

[0143] In this embodiment, the energy storage device 10 can supply power to household electrical appliances in the user's home or electrical equipment in the production workshop. In some scenarios, such as for the photovoltaic energy storage device 10, the photovoltaic energy storage device 10 can store the electric energy generated by photovoltaic power generation in the battery assembly 100 and perform grid connection to the commercial power grid when the power in the battery assembly 100 is sufficient.

[0144] In some embodiments, the voltage value of the electrical signal output by the battery cell 102 is different from the voltage value required by the electrical device. Therefore, by setting the voltage regulation module 1026, the voltage value of the electrical signal output by the battery assembly 100 can meet the voltage requirement of the electrical device.

[0145] In other embodiments, since the electrical signal during power generation of the battery cell 102 is a direct current (DC) electrical signal, in order to meet the power supply or grid connection requirements, an inverter needs to be set to convert the DC electrical signal into an alternating current (AC) electrical signal. Since the voltage value of the DC electrical signal output by the battery assembly 100 does not necessarily match the input voltage range of the inverter, the voltage regulation module 1026 can be set to adjust the output voltage of the battery assembly 100.

[0146] Exemplarily, the voltage regulation module 1026 is a DC voltage regulation module 1026, that is, a DC / DC voltage regulation module 1026.

[0147] By setting the voltage regulation module 1026 to adjust the output voltage of the battery assembly 100 in the embodiments of the present application, the voltage value of the discharge signal of the battery assembly 100 can meet the power consumption or grid connection requirements.

[0148] In some embodiments of the present application, optionally, the battery cell 102 further includes: a fourth switching device K4. The fourth switching device K4 is disposed between the input end of the voltage regulation module 1026 and the battery cell GB, and is used to control the on / off of the circuit between the voltage regulation module 1026 and the battery cell GB.

[0149] In this embodiment, the battery cell 102 includes a fourth switching device K4. The fourth switching device K4 is connected in series to the circuit between the voltage regulation module 1026 and the battery cell GB. When the fourth switching device K4 is turned off, the circuit between the battery cell GB and the voltage regulation module 1026 is cut off, and at this time, the battery cell GB cannot discharge externally.

[0150] When the fourth switching device K4 is turned on, the circuit between the battery cell GB and the voltage regulation module 1026 is conducted, and at this time, the battery cell GB can discharge externally through the voltage regulation module 1026.

[0151] By setting the fourth switching device K4 to control the on / off of the circuit between the voltage regulation module 1026 and the battery cell GB in the embodiments of the present application, the safety of the battery cell 102 can be ensured.

[0152] In some embodiments of the present application, the energy storage device 10 further includes: a power supply module 1028. The power supply module 1028 is electrically connected to the battery management module 1022 and the voltage regulation module 1026, and is used to supply power to the battery management module 1022 and the voltage regulation module 1026.

[0153] In this embodiment, the power supply module 1028 is specifically a functional module for supplying power to the battery management module 1022 and the voltage regulation module 1026. Specifically, the input end of the power supply module 1028 is electrically connected to the battery cell GB, the first output end of the power supply module 1028 is electrically connected to the battery management module 1022, and the second output end of the power supply module 1028 is electrically connected to the voltage regulation module 1026.

[0154] The power supply module 1028 can adjust the electrical signal discharged by the battery cell GB into an electrical signal suitable for supplying power to the battery management module 1022 and the voltage regulation module 1026, so as to ensure that the battery management module 1022 and the voltage regulation module 1026 can work normally without being affected by the voltage fluctuation of the battery cell GB, and improve the reliability and stability of the battery unit 102 and the energy storage device 10.

[0155] In some embodiments of the present application, optionally, the energy storage device 10 further includes: a fuse device FU, and the fuse device FU is connected in series with the fourth switching device K4.

[0156] In this embodiment, the fourth switching device K4 is used to control the on / off of the circuit between the voltage regulation module 1026 and the battery cell GB. When a system fault occurs, the circuit between the battery cell GB and the voltage regulation module 1026 can be disconnected through the fourth switching device K4, so as to prevent the spread of faults such as overcurrent and overvoltage.

[0157] When a specific fault occurs, such as an instantaneous overcurrent being too large, the fourth switching device K4 may not be able to disconnect the battery cell GB and the voltage regulation module 1026 in the first time. At this time, the fuse device FU can disconnect the battery cell GB and the voltage regulation module 1026 before the fourth switching device K4 operates.

[0158] Exemplarily, the fuse device FU is a thermal fuse.

[0159] Exemplarily, the fuse device FU is an air circuit breaker.

[0160] In the embodiment of the present application, the fuse device FU is arranged at the output end of the battery cell GB. When a battery unit 102 fails, the faulty battery unit 102 can be cut off in the first time, so as to ensure the reliability and safety of the battery assembly 100 and the energy storage device 10.

[0161] In the description of the present application, the term "a plurality of" means two or more. Unless otherwise clearly defined, the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship described in the drawings. This is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present application. The terms "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0162] In the description of the present application, the description of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0163] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An energy storage device, characterized in that, Comprising: At least two electrically connected battery cells, the battery cells comprising: A battery core; A battery management module, the battery management module being electrically connected to the battery core, the battery management module being configured to start and generate a start signal after being conducted with the battery core; A linkage module, the linkage module being electrically connected to the battery management module, and being configured to control the conduction of the circuit between the battery core and the battery management module in other battery cells electrically connected to the battery cell when receiving the start signal.

2. The energy storage device according to claim 1, wherein The battery cell further comprises: A first switching device, the battery core and the battery management module being electrically connected through the first switching device; when the first switching device is closed, the circuit between the battery management module and the battery core is conducted; when the first switching device is open, the circuit between the battery management module and the battery core is cut off.

3. The energy storage device according to claim 2, wherein Further comprising: A second switching device, the second switching device being connected in parallel with the first switching device, and when the second switching device is closed, the circuit between the battery management module and the battery core is conducted.

4. The energy storage device according to claim 3, wherein The battery management module is further configured to generate a control signal for controlling the first switching device to close.

5. The energy storage device according to claim 3, characterized in that, Further comprising: A control component, the control component being electrically connected to the battery cell for controlling the operation of the battery cell, and the second switching device is disposed on the control component.

6. The energy storage device according to claim 5, wherein, Further comprising: A first operation module, the first operation module being disposed on the control component and electrically connected to the second switching device, and being configured to control the second switching device to close when receiving a first power-on input.

7. The energy storage device according to claim 3, wherein, Further comprising: A second operation module, the second operation module being disposed on the battery cell and electrically connected to the second switching device, and being configured to control the second switching device to close when receiving a second power-on input, and control the battery management module to generate a stop start signal, the stop start signal being used to instruct the linkage module to control the circuit between the battery core and the battery management module in other battery cells electrically connected to the battery cell to remain cut off.

8. The energy storage device according to any one of claims 2 to 7, characterized in that, The linkage module comprises: A third switching device, the third switching device being electrically connected to the battery management module, and the start signal being used to control the third switching device to close; Wherein, when the first battery cell is electrically connected to the second battery cell, the third switching device in the first battery cell is connected in parallel with the first switching device in the second battery cell, and when the third switching device in the first battery cell is closed, the circuit between the battery management module and the battery core in the second battery cell is conducted, and at least two of the battery cells include the first battery cell and the second battery cell.

9. The energy storage device according to any one of claims 1 to 7, characterized in that Further comprising: A bus circuit, at least two of the battery cells being electrically connected through the bus circuit.

10. The energy storage device according to claim 9, wherein The battery cell further comprises: A voltage regulation module, the input end of the voltage regulation module is electrically connected to the battery cell, the output end of the voltage regulation module is electrically connected to the bus circuit, and the voltage regulation module is used to adjust the voltage value of the electrical signal output by the battery cell.

11. The energy storage device according to claim 10, wherein, The battery unit further includes: A fourth switching device, the fourth switching device is arranged between the input end of the voltage regulation module and the battery cell, and is used to control the on-off of the circuit between the voltage regulation module and the battery cell.

12. The energy storage device according to claim 10, wherein The battery unit further includes: A power supply module, the power supply module is electrically connected to the battery management module and the voltage regulation module, and is used to supply power to the battery management module and the voltage regulation module.

13. The energy storage device according to claim 11, characterized in that, The battery unit further includes: A fuse device, the fuse device is connected in series with the fourth switching device.

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