Energy storage system

Abstract

The utility model provides an energy storage system. The energy storage system comprises a battery pack, an energy storage converter and a battery management system, the energy storage converter is connected with the battery pack, and the battery pack is connected with external equipment through the energy storage converter; the battery management system comprises a first main control circuit and a wake-up sleep circuit, and the first main control circuit is connected with the battery pack and the energy storage converter and used for monitoring and managing the battery pack; the wake-up sleep circuit is connected with the first main control circuit and is used for controlling the first main control circuit to be in a wake-up state when the energy storage converter is in a high-voltage state; and the control module is used for controlling the first main control circuit to be in a dormant state when the energy storage converter is in the lower high-voltage state. Through the mode, the fault maintenance difficulty of the energy storage system can be effectively reduced, and the maintenance cost of the energy storage system is further effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, in particular to an energy storage system. BACKGROUND

[0002] At present, in the household energy storage industry, the battery management system (BMS) of the energy storage system will continuously consume the power of its power supply when the energy storage system is under abnormal fault and high voltage. In addition, after the abnormal fault and high voltage, maintenance personnel need to troubleshoot the energy storage system within a short time, or if the maintenance personnel do not troubleshoot the energy storage system within a predetermined time after the abnormal fault and high voltage, the power supply of the BMS will be in an under-voltage state or even a state lower than the chargeable level, which will cause the BMS to be unable to be woken up, so that the maintenance personnel cannot troubleshoot the energy storage system. As a result, the difficulty of fault maintenance and the maintenance cost of the energy storage system are large. CONTENT OF THE UTILITY MODEL

[0003] The present application provides an energy storage system, which comprises a battery pack, an energy storage converter and a battery management system. The energy storage converter is connected with the battery pack, and the battery pack is connected with external equipment through the energy storage converter. The battery management system comprises a first master control circuit and a wake-up and sleep circuit. The first master control circuit is connected with the battery pack and the energy storage converter, and is used for monitoring and managing the battery pack. The wake-up and sleep circuit is connected with the first master control circuit, and is used for controlling the first master control circuit to be in a wake-up state when the energy storage converter is in an upper high voltage state, and for controlling the first master control circuit to be in a sleep state when the energy storage converter is in a lower high voltage state.

[0004] In some embodiments, the wake-up and sleep circuit comprises a first wake-up and sleep circuit, and the energy storage converter comprises a second master control circuit, a conversion circuit connected with the battery pack and the second master control circuit, and a first communication circuit connected with the second master control circuit. The second master control circuit is used for being in communication connection with the first wake-up and sleep circuit and the first master control circuit through the first communication circuit. When the conversion circuit is in an upper high voltage state, the second master control circuit sends a communication message to the first wake-up and sleep circuit, so as to control the first master control circuit to be in a wake-up state. When the conversion circuit is in a lower high voltage state, the second master control circuit stops sending the communication message to the first wake-up and sleep circuit, so as to control the first master control circuit to be in a sleep state.

[0005] In some embodiments, the energy storage converter comprises a second communication circuit connected to the second master control circuit, the second master control circuit being in communication connection with an external host computer through the second communication circuit to obtain a control instruction of the external host computer, and the first wake-up and sleep circuit is further configured to control the first master control circuit to enter the wake-up state or the sleep state based on the control instruction.

[0006] In some embodiments, the wake-up and sleep circuit further comprises a second wake-up and sleep circuit connected to the master control circuit, and configured to control the first master control circuit to be in the initial wake-up state based on the first master control circuit accessing the power supply voltage.

[0007] In some embodiments, the battery management system further comprises a timing circuit connected to the first master control circuit, the timing circuit being configured to start timing in response to the first master control circuit entering the initial wake-up state, and generate a switching signal when a maintenance time of the initial wake-up state is greater than a preset time length, and the first master control circuit being configured to disconnect from the second wake-up and sleep circuit based on the switching signal, and connect to the first wake-up and sleep circuit, so that the first master control circuit realizes wake-up or sleep through the first wake-up and sleep circuit.

[0008] In some embodiments, the energy storage system further comprises a first switch circuit, the first master control circuit and the second wake-up and sleep circuit being connected to the battery pack through the first switch circuit, and the first switch circuit being configured to selectively turn on or off to selectively connect the first master control circuit and the second wake-up and sleep circuit to the battery pack.

[0009] In some embodiments, the energy storage system further comprises a conversion circuit, the battery pack, the first switch circuit and the conversion circuit being electrically connected in sequence along a direction of electric signal flow of the battery pack, the conversion circuit further being electrically connected to the first master control circuit and the second wake-up and sleep circuit, the first switch circuit being configured to selectively connect the conversion circuit to the battery pack, and the conversion circuit being configured to convert an initial voltage signal of the battery pack into the power supply voltage.

[0010] In some embodiments, the wake-up and sleep circuit comprises a third wake-up and sleep circuit configured to control the first master control circuit to be in the wake-up state based on the first master control circuit accessing the power supply voltage, the energy storage system further comprises a second switch circuit having a first signal end connected to the battery pack and a control end connected to the energy storage converter, and a conversion circuit connected to a second signal end of the second switch circuit, the first master control circuit and the third wake-up and sleep circuit, and configured to convert an initial voltage signal of the battery pack into the power supply voltage, and in the high-voltage state, the energy storage converter is configured to control the first signal end of the second switch circuit to be disconnected from the second signal end of the second switch circuit, so that the first master control circuit enters the sleep state.

[0011] In some embodiments, the energy storage system further comprises a safety circuit comprising a safety switch connected between the battery pack and the energy storage converter for selectively connecting the battery pack and the energy storage converter.

[0012] In some embodiments, the safety circuit further comprises a fuse connected between the battery pack and the energy storage converter for disconnecting the battery pack and the energy storage converter in response to a current between the battery pack and the energy storage converter being greater than a preset threshold.

[0013] The beneficial effects of the embodiments of the present application are: unlike the existing battery management system, in the present application, in addition to the first master control circuit for monitoring and managing the battery pack and the energy storage converter, the battery management system further comprises a wake-up and sleep circuit for controlling the first master control circuit to sleep or wake up according to the high-voltage state of the energy storage converter. The wake-up and sleep circuit controls the first master control circuit to be in a wake-up state when the energy storage converter is in an upper high-voltage state, and controls the first master control circuit to be in a sleep state when the energy storage converter is in a lower high-voltage state, so that the first master control circuit can wake up or sleep according to the high-voltage state of the energy storage converter, which can effectively reduce the power consumption of the first master control circuit to its power supply. Especially when the energy storage system fails and the energy storage converter is in a lower high-voltage state due to a fault anomaly, the wake-up and sleep circuit can directly control the first master control circuit to enter a sleep state, thereby effectively reducing the power consumption of the first master control circuit to the power supply. In this way, the energy storage system can reserve more fault troubleshooting waiting time, thereby effectively reducing the difficulty of fault maintenance of the energy storage system, and further effectively reducing the maintenance cost of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a circuit structure schematic diagram of the first embodiment of the energy storage system of the present application;

[0015] Figure 2 is a circuit structure schematic diagram of the second embodiment of the energy storage system of the present application. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0017] The terms "first", "second", etc. in this application are only for descriptive purpose and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified. In addition, the terms "include" and "have" and any variations thereof are intended to cover exclusive inclusion. For example, a process, method, system, product or device including a series of steps or units is not limited to the listed steps or units, but can optionally include steps or units not listed or can optionally include other steps or units inherent to these processes, methods, products or devices.

[0018] As shown in Figure 1 and Figure 2 The present application provides an energy storage system 10, which is a household energy storage system 10. The energy storage system 10 comprises a battery pack 700, an energy storage converter 200 (PCS, Power Conversion System) and a battery management system 100. The energy storage converter 200 is connected with the battery pack 700, and the battery pack 700 is connected with an external device 20 through the energy storage converter 200. The battery management system 100 comprises a first master control circuit 110 and a wake-up and sleep circuit 600. The first master control circuit 110 is connected with the battery pack 700 and the energy storage converter 200, and is used for monitoring and managing the battery pack 700. The wake-up and sleep circuit 600 is connected with the first master control circuit 110, and is used for controlling the first master control circuit 110 to be in a wake-up state when the energy storage converter 200 is in an upper high-voltage state, and for controlling the first master control circuit 110 to be in a sleep state when the energy storage converter 200 is in a lower high-voltage state.

[0019] Specifically, the energy storage converter 200, also known as a bidirectional energy storage converter 200, is used to convert the direct current signal of the battery pack 700 into an alternating current signal to power the external device 20 (a power consumption device), and is used to convert the alternating current signal of the external device 20 (a charging device) into a direct current signal to charge the battery pack 700. Wherein, the upper high-voltage state of the energy storage converter 200 refers to the state of the energy storage converter 200 when performing the electrical signal conversion function to power the external device 20 (a power consumption device) or charge the battery pack 700 through the external device 20 (a power supply device), and the lower high-voltage state of the energy storage converter 200 refers to the state of the energy storage converter 200 when stopping performing the electrical signal conversion function, i.e. disconnecting with the external device 20 (including a power consumption device and a power supply device) or disconnecting with the external device 20 (including a power consumption device and a power supply device) due to fault reasons and unable to perform the electrical signal conversion function.

[0020] The first master circuit 110 is a circuit for monitoring and managing the battery pack 700 in the battery management system 100. For example, the first master circuit 110 can monitor and manage the voltage, current, temperature, etc. of the battery pack 700. Of course, the first master circuit 110 is also used to control components such as the energy storage converter 200 based on voltage, current, temperature, etc. control information of the battery pack 700, etc. For details, please refer to the related documents on the energy storage system 10. In the research and development stage, the energy storage system 10 needs to calculate the power consumption of the first master circuit 110. In the prior art, when the first master circuit 110 is woken up (i.e. the first master circuit 110 enters the wake-up state), the first master circuit 110 will continuously consume the power of the power supply that supplies power to it. When the energy storage converter 200 is in a lower high-voltage state, for example, due to a fault of the energy storage system 10, the energy storage converter 200 is in a lower high-voltage state, the first master circuit 110 cannot immediately enter the sleep state, thereby causing the first master circuit 110 to excessively consume the power of its power supply, thereby causing the energy storage system 10 to have too little troubleshooting waiting time for maintenance personnel after a fault. If the maintenance personnel do not perform fault maintenance on the energy storage system 10 for a long time, the power of the power supply of the battery management system 100 will be completely consumed, causing the maintenance personnel to be unable to perform fault maintenance on the energy storage system 10 or needing to charge the power supply before performing fault maintenance on the energy storage system 10. This will greatly increase the difficulty of fault maintenance of the energy storage system 10, thereby greatly increasing the maintenance cost of the energy storage system 10. In the embodiments of the present application, the power supply of the battery management system 100 is the battery pack 700. In other embodiments, the power supply of the battery management system 100 can also be an independent power supply, which will not be described in detail here.

[0021] Unlike the existing battery management system 100, in the embodiments of the present application, in addition to being provided with the first master control circuit 110 for monitoring and managing the battery pack 700 and the energy storage converter 200, the battery management system 100 further comprises a wake-up and sleep circuit 600 for controlling the first master control circuit 110 to sleep or wake up according to the high-voltage state of the energy storage converter 200. The wake-up and sleep circuit 600 controls the first master control circuit 110 to be in a wake-up state when the energy storage converter 200 is in an upper high-voltage state, and controls the first master control circuit 110 to be in a sleep state when the energy storage converter 200 is in a lower high-voltage state, so that the first master control circuit 110 can wake up or sleep according to the high-voltage state of the energy storage converter 200, which can effectively reduce the power consumption of the first master control circuit 110. Especially when the energy storage system 10 fails and the energy storage converter 200 is in a lower high-voltage state due to a fault anomaly, the wake-up and sleep circuit 600 can directly control the first master control circuit 110 to enter a sleep state, thereby effectively reducing the power consumption of the first master control circuit 110. In this way, the energy storage system 10 can reserve more troubleshooting waiting time, thereby effectively reducing the difficulty of fault maintenance of the energy storage system 10, and further effectively reducing the maintenance cost of the energy storage system 10.

[0022] Of course, in some embodiments, the energy storage system 10 further comprises an energy management system (EMS, Energy Management System) (not shown in the figure), which cooperates with the battery management system 100 to monitor and manage the battery pack 700 and the energy storage converter 200. The cooperation between the energy management system, the battery management system 100 and the energy storage converter 200 can refer to the related literature of the energy storage system, which will not be described in detail here.

[0023] Optionally, as Figure 1As shown, in some embodiments, the wake-up sleep circuit 600 comprises the first wake-up sleep circuit 120, the energy storage converter 200 comprises: a second master circuit 210, a conversion circuit 220, and a first communication circuit 230. The conversion circuit 220 is connected with the battery pack 700 and the second master circuit 210, the battery pack 700 is connected with the external device 20 through the energy storage converter 200; the first communication circuit 230 is connected with the second master circuit 210, and the second master circuit 210 is used for being in communication connection with the first wake-up sleep circuit 120 and the first master circuit 110 through the first communication circuit 230; wherein when the conversion circuit 220 is in the upper high-voltage state, the second master circuit 210 sends a communication message to the first wake-up sleep circuit 120, so that the first wake-up sleep circuit 120 controls the first master circuit 110 to be in the wake-up state; when the conversion circuit 220 is in the lower high-voltage state, the second master circuit 210 stops sending the communication message to the first wake-up sleep circuit 120, so that the first wake-up sleep circuit 120 controls the first master circuit 110 to be in the sleep state.

[0024] Specifically, the conversion circuit 220 is a circuit in the energy storage converter 200 for performing an electrical signal conversion function based on the control of the second master control circuit 210, for example, the conversion circuit 220 is used to convert the direct current signal of the battery pack 700 into an alternating current signal to power the external device 20 (a power consumption device), and is used to convert the alternating current signal of the external device 20 (a charging device) into a direct current signal to charge the battery pack 700. Wherein, the conversion circuit 220 is in an upper high voltage state, that is, the energy storage converter 200 is in an upper high voltage state, and the conversion circuit is in a lower high voltage state, that is, the energy storage converter 200 is in a lower high voltage state. The second master control circuit 210 can monitor and manage the conversion circuit 220 in real time, and send a communication message related to the working state of the conversion circuit 220 to the first master control circuit 110 through the first communication circuit 230. Wherein, when the conversion circuit 220 is in an upper high voltage state, the second master control circuit 210 sends a communication message to the first master control circuit 110 and the first wake-up and sleep circuit 120 through the first communication circuit 230, so that the first wake-up and sleep circuit 120 controls the first master control circuit 110 to enter a wake-up state (that is, controls the first master control circuit 110 to wake up and keep) based on the communication message, and when the conversion circuit 220 is in a lower high voltage state, the second master control circuit 210 stops sending a communication message to the first wake-up and sleep circuit 120 and the first master control circuit 110, so that the first wake-up and sleep circuit 120 controls the first master control circuit 110 to enter a sleep state. In this way, the second master control circuit 210 can control the wake-up and sleep work of the first master control circuit 110 by the first wake-up and sleep circuit 120 based on the upper and lower high voltage states of the conversion circuit 220. It should be noted that the second master control circuit 210 can realize real-time communication with the first master control circuit 110 and the first wake-up and sleep circuit 120 through the first communication circuit 230 in an off-grid state (that is, the second master control circuit 210 is not connected with an external remote device, for example, an external host computer), so as to control the wake-up and sleep work of the first master control circuit 110 by the first wake-up and sleep circuit 120 based on the upper and lower high voltage states of the conversion circuit 220.

[0025] As Figure 1 and Figure 2As shown, in some embodiments, the battery management system 100 further comprises a third communication circuit 140, which is in communication connection with the first master control circuit 110 and in communication connection with the second communication circuit 240, so as to enable the first master control circuit 110 to communicate with the second master control circuit 210. The first communication circuit 230 and the third communication circuit 140 can be the same type of communication circuit, and the communication type can be universal asynchronous receiver-transmitter (UART). Of course, in other embodiments, the first communication circuit 230 and the third communication circuit 140 can also be other types of communication circuits, which will not be described in detail herein.

[0026] Optionally, as shown, Figure 1 and Figure 2 As shown, in some embodiments, the energy storage converter 200 comprises a second communication circuit 240. The second communication circuit 240 is connected with the second master control circuit 210, and the second master control circuit 210 is in communication connection with an external host computer through the second communication circuit 240, so as to obtain the control instruction of the external host computer, so that the first master control circuit 110 can realize hibernation or wake-up under the remote control of the external host computer.

[0027] Specifically, the second communication circuit 240 can be a local area network circuit or other communication circuit, and the second master control circuit 210 can realize remote communication connection with the external host computer through the second communication circuit 240, so that the first master control circuit 110 can realize hibernation or wake-up under the remote control of the external host computer. For example, in Figure 1 As shown in the first embodiment of the energy storage system 10, the second master control circuit 210 is in communication connection with the external host computer through the second communication circuit 240, so as to obtain the control instruction of the external host computer, and the first wake-up and hibernation circuit 120 is further used to control the first master control circuit 110 to enter the wake-up state or the hibernation state based on the control instruction. In other words, after the external host computer is in communication connection with the second master control circuit 210, the corresponding control instruction can be sent to the first wake-up and hibernation circuit 120 through the second master control circuit 210, so as to control the first wake-up and hibernation circuit 120 to control the wake-up or hibernation of the first master control circuit 110, or the external host computer can also send the control instruction directly to the first wake-up and hibernation circuit 120 through the first communication circuit 230 after being in communication connection with the second master control circuit 210, so as to control the first wake-up and hibernation circuit 120 to control the wake-up or hibernation of the first master control circuit 110. For another example, in Figure 2In the first embodiment of the energy storage system 10 shown, the second master control circuit 210 is connected to an external host computer through the second communication circuit 240 to obtain control instructions from the external host computer and transmit the control instructions to the third wake-up and sleep circuit 160, so that the third wake-up and sleep circuit 160 controls the first master control circuit 110 to enter the wake-up state or the sleep state based on the control instructions.

[0028] For example, when the energy storage system 10 is in the lower high-voltage state due to a fault, the energy storage converter 200 can be connected to the external host computer through the second communication circuit 240, so that the maintenance personnel can wake up the first master control circuit 110 through the external host computer, thereby enabling the maintenance personnel to quickly view the fault information of the energy storage system 10.

[0029] Optionally, as Figure 1 In some embodiments, the wake-up and sleep circuit 600 further includes a second wake-up and sleep circuit 130 connected to the first master control circuit 110 and configured to control the first master control circuit 110 to enter the initial wake-up state based on the first master control circuit 110 being connected to the power supply voltage (power supply voltage V1+, power supply voltage V1-).

[0030] Specifically, before the first master control circuit 110 is connected to the power supply voltage (power supply voltage V1+, power supply voltage V1-), the first master control circuit 110 is controlled to wake up by the second wake-up and sleep circuit 130, in other words, after the first master control circuit 110 is connected to the power supply voltage (power supply voltage V1+, power supply voltage V1-), the second wake-up and sleep circuit 130 controls the first master control circuit 110 to enter the initial wake-up state, so that the first master control circuit 110 can work normally. When the first master control circuit 110 is initially woken up by the second wake-up and sleep circuit 130, the first master control circuit 110 can actively shield the wake-up and sleep control of the second wake-up and sleep circuit 130, for example, the first master control circuit 110 can be disconnected from the second wake-up and sleep circuit 130 and switched to be controlled to wake up and sleep by the first wake-up and sleep circuit 120. After the first master control circuit 110 is disconnected from the power supply, that is, the power supply voltage (power supply voltage V1+, power supply voltage V1-) is stopped being provided to the first master control circuit 110, the first master control circuit 110 is switched again to be controlled to wake up and sleep by the second wake-up and sleep circuit 130, and after the first master control circuit 110 is connected to the power supply voltage (power supply voltage V1+, power supply voltage V1-) again, the second wake-up and sleep circuit 130 can control the first master control circuit 110 to enter the wake-up state again.

[0031] As Figure 1As shown, in some embodiments, the battery management system 100 further comprises a timing circuit 150 connected with the first master control circuit 110. The timing circuit 150 is configured to start timing in response to the first master control circuit 110 entering the initial wake-up state, and generate a switching signal when the maintenance time of the initial wake-up state is greater than a preset time length. The first master control circuit 110 is configured to disconnect from the second wake-up and sleep circuit 130 and connect with the first wake-up and sleep circuit 120 based on the switching signal, so that the first master control circuit 110 realizes wake-up or sleep through the first wake-up and sleep circuit 120. The preset time length can be set according to actual working conditions, which will not be described in detail here.

[0032] Optionally, as shown in the figure, Figure 1 As shown, in some embodiments, the energy storage system 10 further comprises a first switch circuit 300, and the first master control circuit 110 and the second wake-up and sleep circuit 130 are connected with the battery pack 700 through the first switch circuit 300. The first switch circuit 300 is configured to selectively turn on or off, so that the first master control circuit 110 and the second wake-up and sleep circuit 130 are selectively connected with the battery pack 700.

[0033] Specifically, in the embodiments of the present application, the battery management system 100 is powered by the battery pack 700, in other words, the first master control circuit 110 is electrically connected with the battery pack 700 through the first switch circuit 300. The first switch circuit 300 can be selectively turned on or off to provide the first master control circuit 110 with a supply voltage (supply voltage V1+, supply voltage V1-). The second wake-up and sleep circuit 130 and the first master control circuit 110 are both electrically connected with the battery pack 700 through the first switch circuit 300. In this way, when the first switch circuit 300 is turned on, the second wake-up and sleep circuit 130 can quickly determine that the first master control circuit 110 has accessed the supply voltage (supply voltage V1+, supply voltage V1-), so as to control the first master control circuit 110 to enter the initial wake-up state. The first switch circuit 300 can be a physical switch, an electronic switch or other controllable switch.

[0034] Optionally, as shown in the figure, Figure 1As shown, in some embodiments, the energy storage system 10 further comprises: a conversion circuit 500, the battery pack 700, the first switch circuit 300 and the conversion circuit 500 are sequentially electrically connected in the direction of the electric signal flow of the battery pack 700, and the conversion circuit 500 is further electrically connected with the first main control circuit 110 and the second wake-up and sleep circuit 130, the first switch circuit 300 is used for selectively connecting the conversion circuit 500 and the battery pack 700, and the conversion circuit 500 is used for converting the initial voltage signal (the initial voltage signal V2+, the initial voltage signal V2-) of the battery pack 700 into the supply voltage (the supply voltage V1+, the supply voltage V1-). Wherein, the conversion circuit 500 is a circuit for converting the initial electric signal of the battery pack 700 into the supply voltage (the supply voltage V1+, the supply voltage V1-), which can be a DC to DC converter.

[0035] Optionally, as Figure 2 As shown, in some embodiments, the wake-up and sleep circuit 600 comprises a third wake-up and sleep circuit 160, which is used for controlling the first main control circuit 110 to be in the wake-up state based on the first main control circuit 110 accessing the supply voltage (the supply voltage V1+, the supply voltage V1-), and the energy storage system 10 further comprises: a second switch circuit 301, a first signal end of which is connected with the battery pack 700, and a control end of the second switch circuit 301 is connected with the energy storage converter 200; a conversion circuit 500, which is connected with a second signal end of the second switch circuit 301, the first main control circuit 110 and the third wake-up and sleep circuit 160, and is used for converting the initial voltage signal (the initial voltage signal V2+, the initial voltage signal V2-) of the battery pack 700 into the supply voltage (the supply voltage V1+, the supply voltage V1-); in the high-voltage state, the energy storage converter 200 is used for controlling the first signal end of the second switch circuit 301 to be disconnected with the second signal end of the second switch circuit 301, so as to make the first main control circuit 110 enter the sleep state.

[0036] Specifically, different from the first embodiment of the energy storage system 10, in the second embodiment of the energy storage system 10, the wake-up and sleep circuit 600 in the battery management system 100 can only be provided with the third wake-up and sleep circuit 160, wherein the third wake-up and sleep circuit 160 can control the first master control circuit 110 to be in the wake-up state or the sleep state according to whether the first master control circuit 110 is connected to the power supply voltage (the power supply voltage V1+, the power supply voltage V1-). The first switch circuit 300 can be replaced by a second switch circuit 301, and the specific circuit structure of the energy storage converter 200 can refer to the description in any of the above embodiments, wherein the second switch circuit 301 is in control connection with the energy storage converter 200, and when the energy storage converter 200 is in the high-voltage state, the energy storage converter 200 sends a control signal to the first switch circuit 300 to control the first switch circuit 300 to be disconnected, so that the battery pack 700 is disconnected from the third wake-up and sleep circuit 160 and the first master control circuit 110, and thus the first master control circuit 110 stops working (which can also be understood as that the first master control circuit 110 enters the sleep state), thereby effectively reducing the power consumption of the first master control circuit 110 on the battery pack 700. The specific functions of the conversion circuit 500 can refer to the description in the above embodiments, which will not be described in detail here. The specific circuit structure and circuit connection of the energy storage system 10 can refer to the description in the above embodiments, which will not be described in detail here. Figure 2

[0037] Optionally, as shown in Figure 1 and Figure 2 In some embodiments, the energy storage system 10 further comprises a safety circuit 400, and the safety circuit 400 comprises a safety switch 420 connected between the battery pack 700 and the energy storage converter 200, used to selectively connect the battery pack 700 and the energy storage converter 200. Specifically, the safety circuit 400 is a circuit for providing safety guarantee for the electrical connection between the battery pack 700 and the energy storage converter 200. The safety switch 420 can be a physical switch or a controllable switch such as a relay, so that when the energy storage converter 200 needs to work in the high-voltage state, the safety switch 420 can be turned on to make the energy storage converter 200 work in the high-voltage state, and when the energy storage converter 200 does not need to work in the high-voltage state, the safety switch 420 can be turned off to make the energy storage converter 200 work in the low-voltage state. By providing the safety switch 420 between the battery pack 700 and the energy storage converter 200, the safety switch 420 can also quickly cut off the electrical circuit between the battery pack 700 and the energy storage converter 200 when the energy storage converter 200 is in an abnormal working state, thereby effectively improving the safety performance of the energy storage system 10.

[0038] Optionally, as shown in Figure 1 and Figure 2 ​As shown, in some embodiments, the safety circuit 400 further comprises a fuse 410 connected between the battery pack 700 and the energy storage converter 200, for disconnecting the battery pack 700 and the energy storage converter 200 in response to a current between the battery pack 700 and the energy storage converter 200 being greater than a preset threshold, so as to further improve the safety performance of the energy storage system 10.

[0039] It is worth noting that the drawings herein are only for showing the structural relationship and connection relationship of the utility model product, and do not limit the specific structural size of the utility model product.

[0040] The above is only the embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process transformation using the content of the utility model specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection range of the utility model.

Claims

1. An energy storage system, characterized in that, The energy storage system includes: Battery pack; An energy storage converter is connected to the battery pack, and the battery pack is connected to external devices through the energy storage converter. Battery management system, including: The first main control circuit is connected to the battery pack and the energy storage converter, and is used to monitor and manage the battery pack. A wake-up and hibernation circuit, connected to the first main control circuit, is used to control the first main control circuit to be in a wake-up state when the energy storage converter is in an upper high voltage state; and to control the first main control circuit to be in a hibernation state when the energy storage converter is in a lower high voltage state.

2. The energy storage system according to claim 1, characterized in that, The wake-up sleep circuit includes a first wake-up sleep circuit, and the energy storage converter includes: Second main control circuit; A converter circuit is connected to the battery pack and the second main control circuit, and the battery pack is connected to external devices through the energy storage converter. A first communication circuit is connected to a second main control circuit. The second main control circuit is used to communicate with the first wake-up and sleep circuit and the first main control circuit through the first communication circuit. Specifically, when the converter circuit is in a high-voltage state, the second main control circuit sends a communication message to the first wake-up and sleep circuit, so that the first wake-up and sleep circuit controls the first main control circuit to be in a wake-up state; when the converter circuit is in a low-voltage state, the second main control circuit stops sending the communication message to the first wake-up and sleep circuit, so that the first wake-up and sleep circuit controls the first main control circuit to be in a sleep state.

3. The energy storage system according to claim 2, characterized in that, The energy storage converter includes: The second communication circuit is connected to the second main control circuit. The second main control circuit communicates with an external host computer through the second communication circuit to obtain control commands from the external host computer. The first wake-up and sleep circuit is also used to control the first main control circuit to enter a wake-up state or a sleep state based on the control commands.

4. The energy storage system according to claim 2, characterized in that, The wake-up sleep circuit also includes: The second wake-up and hibernation circuit is connected to the first main control circuit and is used to control the first main control circuit to be in the initial wake-up state based on the power supply voltage applied to the first main control circuit.

5. The energy storage system according to claim 4, characterized in that, The battery management system also includes: A timing circuit is connected to the first main control circuit. The timing circuit is used to start timing in response to the first main control circuit entering the initial wake-up state, and to generate a switching signal when the duration of the initial wake-up state is greater than a preset duration. The first main control circuit is used to disconnect from the second wake-up sleep circuit based on the switching signal and connect to the first wake-up sleep circuit, so that the first main control circuit can wake up or go into sleep through the first wake-up sleep circuit.

6. The energy storage system according to claim 4, characterized in that, The energy storage system also includes: A first switching circuit is used to selectively turn the first main control circuit and the second wake-up / sleep circuit on and off, so that the first main control circuit and the second wake-up / sleep circuit can selectively connect to the battery pack.

7. The energy storage system according to claim 6, characterized in that, The energy storage system further includes a conversion circuit, wherein the battery pack, the first switching circuit, and the conversion circuit are sequentially electrically connected along the direction of electrical signal flow of the battery pack, the conversion circuit is also electrically connected to the first main control circuit and the second wake-up and hibernation circuit, the first switching circuit is used to selectively connect the conversion circuit and the battery pack, and the conversion circuit is used to convert the initial voltage signal of the battery pack into the supply voltage.

8. The energy storage system according to claim 1, characterized in that, The wake-up and sleep circuit includes a third wake-up and sleep circuit, used to control the first main control circuit to be in a wake-up state based on the power supply voltage applied to the first main control circuit. The energy storage system further includes: The second switching circuit has its first signal terminal connected to the battery pack and its control terminal connected to the energy storage converter. A conversion circuit, connected to the second signal terminal of the second switching circuit, the first main control circuit, and the third wake-up and sleep circuit, is used to convert the initial voltage signal of the battery pack into a power supply voltage. When the voltage is low, the energy storage converter is used to control the first signal terminal of the second switching circuit to disconnect from the second signal terminal of the second switching circuit, so that the first main control circuit enters a sleep state.

9. The energy storage system according to claim 8, characterized in that, The energy storage system also includes: a safety circuit, comprising: A safety switch is connected between the battery pack and the energy storage converter for selectively connecting the battery pack and the energy storage converter.

10. The energy storage system according to claim 9, characterized in that, The safety circuit also includes: A fuse, connected between the battery pack and the energy storage converter, is used to disconnect the connection between the battery pack and the energy storage converter in response to the current between the battery pack and the energy storage converter exceeding a preset threshold.

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