Wide-voltage-range energy storage system charging device

Abstract

The utility model provides a wide-voltage-range energy storage system charging device, and belongs to the technical field of energy storage batteries. The wide-voltage-range energy storage system electricity supplementing device comprises an electricity supplementing module, a first switch module, a voltage detection module, a temperature detection module and a control module. The input end of the power supply module is connected with the power grid and the PCS module, and the output end is connected with the first end of the first switch module. The second end of the first switch module is used for being connected with the second switch module and the energy storage battery module. The control module is connected with the voltage detection module, the temperature detection module, the first switch module and the second switch module. The voltage detection module is configured to detect voltage information of the energy storage battery module; the temperature detection module is configured to detect temperature information of the energy storage battery module; the control module is configured to control the on-off states of the first switch module and the second switch module according to the voltage information and the temperature information. According to the invention, automatic control of the electricity supplementing device can be realized.

Description

Technical Field

[0001] The present disclosure relates to the technical field of energy storage batteries, and particularly to a power supply replenishment device for an energy storage system with a wide voltage range. Background Art

[0002] With the diversification of power demand, energy storage systems play an increasingly important role in maintaining the stability and reliability of power supply. During the operation of an energy storage system, due to self-discharge, load consumption, etc., it is necessary to replenish power regularly or irregularly to maintain its normal operation and reserve capacity. An energy storage system power supply replenishment device generally refers to a device that can supply electrical energy to an energy storage battery pack in residential, commercial, or industrial applications. However, traditional power supply replenishment methods mostly use a power conversion system (PCS), with a limited working voltage range, and existing power supply replenishment devices lack automatic control and cannot adaptively adjust according to the actual state and requirements of the energy storage system, resulting in unsatisfactory power supply replenishment effects. Summary of the Utility Model

[0003] Embodiments of the present disclosure provide a power supply replenishment device for an energy storage system with a wide voltage range to solve the problem that existing power supply replenishment devices lack automatic control.

[0004] Embodiments of the present disclosure provide a power supply replenishment device for an energy storage system with a wide voltage range, including: a power supply replenishment module, a first switch module, a voltage detection module, a temperature detection module, and a control module;

[0005] The input ends of the power supply replenishment module are respectively used to connect to the power grid and the PCS module, and the output end is connected to the first end of the first switch module; the second end of the first switch module is respectively used to connect to the second switch module and the energy storage battery module;

[0006] The PCS module has its input end connected to the power grid, its output end connected to the first end of the second switch module, and the second end of the second switch module is connected to the energy storage battery module;

[0007] The control module is respectively connected to the voltage detection module, the temperature detection module, and the first switch module; the control module is used to connect to the second switch module; the voltage detection module and the temperature detection module are also both used to connect to the energy storage battery module;

[0008] The voltage detection module is configured to detect the voltage information of the energy storage battery module;

[0009] The temperature detection module is configured to detect the temperature information of the energy storage battery module;

[0010] The control module is configured to control the switch states of the first switch module and the second switch module according to the voltage information and the temperature information.

[0011] In an exemplary embodiment of the present disclosure, the charging module includes a power converter;

[0012] The power converter is used to connect to the power grid;

[0013] The power converter is connected to the first switch module;

[0014] The power converter is configured to convert the electric energy provided by the power grid into a form suitable for storage in the energy storage battery module.

[0015] In an exemplary embodiment of the present disclosure, a charging device for a wide-voltage-range energy storage system further includes a fault detection module;

[0016] The fault detection module is respectively connected to the charging module and the control module.

[0017] In an exemplary embodiment of the present disclosure, the control module includes an OR unit U2 and a control unit;

[0018] The OR unit U2 is respectively connected to the temperature detection module, the voltage detection module and the control unit;

[0019] The control unit is connected to the first switch module;

[0020] The control unit is used to connect to the second switch module.

[0021] In an exemplary embodiment of the present disclosure, the temperature detection module includes a thermistor RT, a resistor R1 and an amplifier U1;

[0022] The first end of the thermistor RT is connected to the VCC power supply, the second end is connected to the first end of the resistor R1, and the second end of the resistor R1 is grounded;

[0023] The second end of the thermistor RT is connected to the non-inverting input terminal of the amplifier U1;

[0024] The inverting input terminal of the amplifier U1 is connected to the Vref reference voltage;

[0025] The output terminal of the amplifier U1 is connected to the OR unit U2.

[0026] In an exemplary embodiment of the present disclosure, a charging device for a wide-voltage-range energy storage system further includes an alarm module;

[0027] The alarm module is connected to the control module.

[0028] In an exemplary embodiment of the present disclosure, a charging device for a wide-voltage-range energy storage system further includes a communication module;

[0029] The control module is communicatively connected to the terminal through the communication module.

[0030] The beneficial effects of a power supply replenishment device for a wide-voltage-range energy storage system provided by an embodiment of the present disclosure are as follows:

[0031] The present disclosure realizes the automated power supply replenishment management of a power supply replenishment device for a wide-voltage-range energy storage system. Through the real-time monitoring of the voltage detection module and the temperature detection module, combined with the intelligent analysis of the control module, the device can automatically judge the charging requirements and safety status of the energy storage battery module, thereby accurately controlling the switching states of the first switch module and the second switch module, realizing the automated management of the power supply replenishment process, and effectively avoiding the cumbersome and error-prone manual operation. At the same time, the device can timely adjust the power supply replenishment strategy according to the battery voltage and temperature information. By accurately controlling the power supply replenishment process, unnecessary power waste is avoided. This design realizes the automated control of the power supply replenishment device through the close cooperation and information interaction among various modules, and is an indispensable important part of a modern energy storage system. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0033] Figure 1 is a schematic structural diagram of a power supply replenishment device for a wide-voltage-range energy storage system provided by an embodiment of the present disclosure;

[0034] Figure 2 is a schematic structural diagram of another power supply replenishment device for a wide-voltage-range energy storage system provided by an embodiment of the present disclosure;

[0035] Figure 3 is a circuit diagram of the temperature detection module provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] In order to enable those skilled in the art to better understand this solution, the following will clearly describe the technical solutions in the embodiments of this solution with reference to the drawings in the embodiments of this solution. Obviously, the described embodiments are some, but not all, of the embodiments of this solution. Based on the embodiments in this solution, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this solution.

[0037] In the description and claims of this solution, and in the above-mentioned drawings, the term "including" and any other variations thereof mean "including but not limited to", intending to cover non-exclusive inclusion and not limited only to the examples listed in the text. In addition, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order.

[0038] The implementation of the present disclosure will be described in detail below in conjunction with specific drawings:

[0039] Figure 1 It is a schematic structural diagram of a power supply replenishment device for a wide voltage range energy storage system provided by an embodiment of the present disclosure. Referring to Figure 1 this, the power supply replenishment device for the wide voltage range energy storage system includes a power supply replenishment module 101, a first switch module 102, a voltage detection module 103, a temperature detection module 104, and a control module 105;

[0040] The input end of the power supply replenishment module 101 is respectively used to connect with the power grid 30 and the PCS module 10, and the output end is connected to the first end of the first switch module 102; the second end of the first switch module 102 is respectively used to connect with the second switch module 20 and the energy storage battery module 40;

[0041] The input end of the PCS module 10 is connected to the power grid 30, the output end is connected to the first end of the second switch module 20, and the second end of the second switch module 20 is connected to the energy storage battery module 40;

[0042] The control module 105 is respectively connected to the voltage detection module 103, the temperature detection module 104, and the first switch module 102; the control module 105 is used to connect with the second switch module 20; both the voltage detection module 103 and the temperature detection module 104 are also used to connect with the energy storage battery module 40;

[0043] The voltage detection module 103 is configured to detect the voltage information of the energy storage battery module 40;

[0044] The temperature detection module 104 is configured to detect the temperature information of the energy storage battery module 40;

[0045] The control module 105 is configured to control the switch states of the first switch module 102 and the second switch module 20 according to the voltage information and the temperature information.

[0046] In this embodiment, the operating voltage range of the PCS module 10 is 600V - 900V, while the operating voltage range of the power supply replenishment module 101 is 0V - 600V.

[0047] The charging module 101 is the core of the wide-voltage-range energy storage system charging device and is also the energy input and output part of the entire device. Its input end is connected to the power grid 30, and it can obtain electric energy from the power grid 30. By connecting to the external power grid 30, electric energy can be provided to the energy storage battery module 40. The first switch module 102 is used to control the on-off of the power during the charging process. The first end of the first switch module 102 is connected to the charging module 101, and the second end is connected to the energy storage battery module 40, determining whether the electric energy from the charging module 101 is transmitted to the energy storage battery module 40 for charging.

[0048] The input end of the PCS module 10 is connected to the power grid 30 to obtain electric energy and can provide electric energy to the energy storage battery module 40. The second switch module 20 is also used to control the on-off of the power during the charging process.

[0049] Exemplarily, when the first switch module 102 is closed, the electric energy of the charging module 101 can be transmitted to the energy storage battery module 40 for charging; when the first switch module 102 is open, the electric energy of the charging module 101 cannot be transmitted to the energy storage battery module 40 for charging.

[0050] In this embodiment, the control module 105 is respectively connected to the voltage detection module 103, the temperature detection module 104, and the first switch module 102. The control module 105 is used to be connected to the second switch module 20, indicating that the control module 105 is in the core control position of the entire device. The voltage detection module 103 and the temperature detection module 104 are also both used to be connected to the energy storage battery module 40. The voltage detection module 103 can detect the voltage information of the energy storage battery module 40 in real time, and these voltage information reflect the charging state and the remaining power level of the battery. Therefore, the voltage information can be transmitted to the control module 105 in the form of an electrical signal, and the control module 105 will analyze and process according to the change of the electrical signal. When the detected voltage range is between 600V and 900V, the control module 105 sends a closing instruction to the second switch module 20 to start the PCS module 10 for charging; when the detected voltage range is between 0V and 600V, the control module 105 sends a closing instruction to the first switch module 102 to control the charging module 101 for charging; when the detected voltage range is greater than 900V, the control module 105 sends a disconnection instruction to control the first switch module 102 or the second switch module 20 to disconnect and stop charging the energy storage battery module 40. The temperature detection module 104 can also detect the temperature information of the energy storage battery module 40 in real time, and can also detect the temperature information of the surrounding environment and transmit the temperature information to the control module 105, and the control module 105 can control the switch states of the first switch module 102 and the second switch module 20 according to the change of the temperature information.

[0051] Exemplarily, based on the information received from the voltage detection module 103 and the temperature detection module 104, the control module 105 makes corresponding decisions and executes these decisions by connecting to the first switch module 102. If the voltage is too low and the temperature is normal, the control module 105 sends a closing instruction to the first switch module 102 or the second switch module 20, enabling the power supply module 101 or the PCS module 10 to charge the energy storage battery module 40. If the voltage is normal and the temperature is too low, the control module 105 also sends a closing instruction to the first switch module 102 or the second switch module 20, enabling the power supply module 101 or the PCS module 10 to charge the energy storage battery module 40. Conversely, if the voltage reaches the full state and the temperature is normal, the control module 105 sends a disconnection instruction to the first switch module 102 or the second switch module 20 to stop the charging process to protect the energy storage battery module 40 from overcharging damage.

[0052] This embodiment realizes the automatic charging management of the power supply device for the energy storage system with a wide voltage range. Through the real-time monitoring of the voltage detection module 103 and the temperature detection module 104, combined with the intelligent analysis of the control module 105, the device can automatically judge the charging demand and safety status of the energy storage battery module 40, thereby accurately controlling the switch states of the first switch module 102 and the second switch module 20, realizing the automatic management of the charging process, and effectively avoiding the cumbersome and error-prone manual operation. At the same time, the device can adjust the charging strategy in a timely manner according to the battery voltage and temperature information. By accurately controlling the charging process, unnecessary power waste is avoided. This design realizes the automatic control of the power supply device through the close cooperation and information interaction among various modules, and is an indispensable important part of modern energy storage systems.

[0053] As Figure 2 shown, in an embodiment of the present disclosure, the power supply module 101 includes a power converter 201;

[0054] The power converter 201 is used to connect to the power grid 30;

[0055] The power converter 201 is connected to the first switch module 102;

[0056] The power converter 201 is configured to convert the electric energy provided by the power grid 30 into a form suitable for storage in the energy storage battery module 40.

[0057] In this embodiment, the electric energy provided by the power grid 30 usually has specific characteristics such as a specific voltage and frequency. The energy storage battery module 40 has specific requirements for receiving and storing electric energy, such as different voltage levels, current characteristics, etc. The core function of the power converter 201 is to perform the conversion of the form of electric energy. It adjusts the electric energy input from the power grid 30, including operations such as voltage boosting and bucking, current transformation, conversion from alternating current to direct current, or optimizing the waveform of the electric energy. Through these conversions, the power converter 201 can adjust the electric energy provided by the power grid 30 into a form suitable for storage by the energy storage battery module 40.

[0058] Exemplarily, if the power grid 30 provides alternating current of 220V, and the energy storage battery module 40 requires direct current of 48V for storage, the power converter 201 will convert the 220V alternating current into 48V direct current.

[0059] In this embodiment, through this conversion function, the power supply replenishment module 101 can adapt to different types and specifications of energy storage battery modules 40, improving the compatibility and flexibility of the entire user energy storage system.

[0060] As Figure 2 shown, in an embodiment of the present disclosure, a power supply replenishment device for a wide voltage range energy storage system further includes a fault detection module 202;

[0061] The fault detection module 202 is respectively connected to the power supply replenishment module 101 and the control module 105.

[0062] In this embodiment, since the power supply replenishment module 101 is an important part of the power supply replenishment device, and the fault detection module 202 is an important part to ensure the safe and reliable operation of the entire power supply replenishment process. The fault detection module 202 can directly detect the working state and performance parameters in the power supply replenishment module 101 by being directly connected to the power supply replenishment module 101. The main function of the fault detection module 202 is to promptly detect various types of faults or abnormal situations. These faults include but are not limited to: damage, overheating, overvoltage, overcurrent of internal components of the power converter 201, voltage fluctuations or abnormalities of the input power grid 30, and problems such as short circuits and open circuits of the connection lines. By continuously monitoring and analyzing these parameters and states, the fault detection module 202 can quickly determine whether there is a fault. Once a fault is detected, it will immediately take corresponding measures, such as sending a fault signal to the control module 105, triggering an alarm device to remind the user, or directly starting a protection mechanism, such as cutting off the power input of the power supply replenishment module 101, to prevent the fault from further expanding, thereby protecting the power supply replenishment module 101 itself and other devices connected thereto (such as the energy storage battery module 40) from damage.

[0063] Exemplarily, if it is detected that the power converter 201 is overheated, the fault detection module 202 will notify the control module 105 to reduce the operating power of the charging module 101, or directly stop the charging operation in case of severe overheating, so as to avoid the power converter 201 being burned out due to overheating.

[0064] The presence of the fault detection module 202 in this embodiment greatly improves the reliability and stability of the charging module 101, and effectively reduces the risk of equipment damage and safety accidents caused by faults.

[0065] As Figure 2 shown, in an embodiment of the present disclosure, the control module 105 includes an OR unit U2 and a control unit 301;

[0066] The OR unit U2 is respectively connected to the temperature detection module 104, the voltage detection module 103 and the control unit 301;

[0067] The control unit 301 is connected to the first switch module 102;

[0068] The control unit 301 is used to be connected to the second switch module 20.

[0069] In this embodiment, the OR unit U2 is respectively connected to the temperature detection module 104 and the voltage detection module 103, and can receive the detection signals from these two modules. The temperature detection module 104 transmits the temperature information of the energy storage battery module 40, and the voltage detection module 103 transmits the voltage information of the energy storage battery module 40. The OR unit U2 will perform logical processing on these information. The logical relationship of "OR" means that as long as the information transmitted by the temperature detection module 104 or the voltage detection module 103 indicates that a control operation is required, the OR unit U2 will transmit the corresponding signal. The OR unit U2 is also connected to the control unit 301, and it will transmit the processed information to the control unit 301. The control unit 301 is the part that finally makes specific control decisions and executes them. Since the control unit 301 is connected to the first switch module 102 and is also used to be connected to the second switch module 20, it can directly control the switch states of the first switch module 102 or the second switch module 20 according to the information received from the OR unit U2.

[0070] Exemplarily, the OR unit U2 includes "0" and "1" signals. If the temperature is too low or the voltage is too low, the OR unit U2 will transmit the corresponding "1" signal to the control unit 301, and the control unit 301 will immediately control the first switch module 102 to close, allowing the charging module 101 to charge the energy storage battery module 40; while when the temperature and voltage are both within the normal range, the OR unit U2 will transmit the corresponding "0" signal to the control unit 301, and the control unit 301 will then control the first switch module 102 to open and stop the charging operation.

[0071] In this embodiment, through this connection method with clear division of labor and mutual cooperation, the control module 105 can accurately and timely control the first switch module 102 or the second switch module 20 according to the state of the energy storage battery module 40, so as to achieve precise management and safety guarantee of the charging process.

[0072] As Figure 3 shown, in an embodiment of the present disclosure, the temperature detection module 104 includes a thermistor RT, a resistor R1, and an amplifier U1;

[0073] The first end of the thermistor RT is connected to the VCC power supply, the second end is connected to the first end of the resistor R1, and the second end of the resistor R1 is grounded;

[0074] The second end of the thermistor RT is connected to the non-inverting input terminal of the amplifier U1;

[0075] The inverting input terminal of the amplifier U1 is connected to the Vref reference voltage;

[0076] The output terminal of the amplifier U1 is connected to the OR unit U2.

[0077] In this embodiment, the thermistor RT is the core sensing element of the temperature detection module 104. The resistance value of the thermistor RT changes with the temperature. When the temperature rises, its resistance value usually decreases; when the temperature drops, the resistance value rises. Since the thermistor RT and the resistor R1 are connected in series to form a voltage dividing circuit, the voltage at their connection point (i.e., the second end of the thermistor RT) changes with the change of the resistance value of the thermistor RT. This changing voltage is input to the non-inverting input terminal of the amplifier U1. The inverting input terminal of the amplifier U1 is connected to a fixed Vref reference voltage. The function of the amplifier U1 is to amplify the voltage difference between the non-inverting input terminal and the inverting input terminal. When the temperature change causes the resistance value of the thermistor RT to change, and then the voltage at the non-inverting input terminal changes, the amplifier U1 outputs a corresponding amplified voltage signal. This amplified voltage signal is output from the output terminal of the amplifier U1 and connected to the OR unit U2. The OR unit U2 determines whether the temperature is within the normal range or whether corresponding control measures need to be taken according to this voltage signal.

[0078] The temperature detection module 104 constructed by the thermistor RT, the resistor R1, and the amplifier U1 in this embodiment realizes high-precision detection of temperature. Through the ingenious combination of the temperature-sensitive characteristic of the thermistor RT and the voltage dividing circuit, the temperature change is accurately converted into a voltage signal, and then amplified and processed by the amplifier U1, significantly improving the reliability and recognizability of the signal. This not only improves the response speed of the device to temperature changes, but also enhances the overall stability and safety of the device.

[0079] As Figure 2 shown, in one embodiment of the present disclosure, a power supply replenishment device for a wide voltage range energy storage system further includes an alarm module 302;

[0080] The alarm module 302 is connected to the control module 105.

[0081] In this embodiment, the alarm module 302 is an important auxiliary part. The alarm module 302 is connected to the control module 105, enabling this module to obtain the working status and relevant information of the control module 105 in real time. The main function of the alarm module 302 is to send a warning signal to the user or relevant personnel in a timely manner when abnormal or faulty conditions occur during the power supply replenishment process. These abnormal conditions include, but are not limited to: overvoltage, overcurrent, overheating of the power supply replenishment module 101, the voltage or temperature of the energy storage battery module 40 exceeding the safe range, and other problems affecting the safety and normal operation of the power supply replenishment. The alarm methods of the alarm module 302 can be various, such as through a sound alarm (such as a buzzer), a light flash (such as an indicator light), etc.

[0082] Exemplarily, when detecting the above abnormal conditions, the alarm module 302 will immediately initiate corresponding alarm actions to attract the user's attention. This enables the user to take timely measures, such as stopping the power supply replenishment operation, checking for equipment faults, etc., thereby avoiding more serious consequences that may occur and ensuring the safe and stable operation of the entire energy storage system. For example, if the power supply replenishment module 101 shows an overheating phenomenon, the alarm module 302 may emit a continuous high-pitched beeping sound accompanied by a red light flash to remind the user to deal with it in a timely manner.

[0083] This embodiment ensures that the alarm module 302 can immediately trigger various forms of warnings by real-time monitoring the working status of the power supply replenishment module 101 and the energy storage battery module 40. Once potential risks or faults such as overvoltage, overcurrent, and overheating are detected, it ensures that users or maintenance personnel can respond quickly. This not only reduces the risk of equipment damage caused by faults not being detected in a timely manner but also effectively avoids safety accidents, safeguarding the safety of users' lives and property.

[0084] As Figure 2 shown, in one embodiment of the present disclosure, a power supply replenishment device for a wide voltage range energy storage system further includes a communication module 303;

[0085] The control module 105 is communicatively connected to the terminal through the communication module 303.

[0086] In this embodiment, the communication module 303 plays a crucial role in information transmission. The communication methods supported by the communication module 303 are diverse and can include Bluetooth, Wi-Fi, mobile networks, etc., to meet the communication requirements in different scenarios. The control module 105 establishes a communication connection with the terminal through the communication module 303, enabling the control module 105 to accurately and timely transmit the real-time operation data and status information of the device, such as the voltage, current, and temperature of the energy storage battery module 40, the working parameters of the power supply module 101, and any fault or alarm information, etc., to the terminal. Here, the terminal can be devices such as the user's mobile phone, computer, tablet, or a remote monitoring center. Through this communication connection, users or monitoring personnel can intuitively understand the operation status of the power supply device without being present on-site. Moreover, the terminal can also send control instructions and parameter settings to the control module 105 through the communication module 303. For example, users can adjust parameters such as the start time of power supply, charging speed, and stop conditions on the terminal according to actual needs. In addition, when the power supply device encounters abnormalities or faults, it can promptly send the fault information to the terminal, enabling users or relevant personnel to quickly learn about it and take timely countermeasures to reduce losses and risks.

[0087] Exemplarily, when going out, users can view the working status of the power supply device through the application on their mobile phones and remotely control it to pause charging to prevent increased costs during peak electricity price periods. The monitoring center can also conduct centralized management and monitoring of multiple power supply devices through this communication connection to achieve efficient operation and maintenance. Or, after receiving the fault alarm information, the monitoring center can remotely diagnose the problem and guide on-site personnel for repair.

[0088] The presence of the communication module 303 in this embodiment greatly improves the monitorability, operability, and intelligence level of the power supply device for the wide voltage range energy storage system.

[0089] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present disclosure.

Claims

1. A power supply replenishment device for a wide voltage range energy storage system, characterized in that, It includes a charging module, a first switching module, a voltage detection module, a temperature detection module, and a control module; For the charging module, the input ends are respectively used to connect to the power grid and the PCS module, and the output end is connected to the first end of the first switching module; the second end of the first switching module is respectively used to connect to the second switching module and the energy storage battery module; For the PCS module, the input end is connected to the power grid, the output end is connected to the first end of the second switching module, and the second end of the second switching module is connected to the energy storage battery module; The control module is respectively connected to the voltage detection module, the temperature detection module, and the first switching module; the control module is used to connect to the second switching module; both the voltage detection module and the temperature detection module are also used to connect to the energy storage battery module; The voltage detection module is configured to detect the voltage information of the energy storage battery module; The temperature detection module is configured to detect the temperature information of the energy storage battery module; The control module is configured to control the switching states of the first switching module and the second switching module according to the voltage information and the temperature information.

2. The supplementary power supply device for a wide voltage range energy storage system according to claim 1, characterized in that, The charging module includes a power converter; The power converter is used to connect to the power grid; The power converter is connected to the first switching module; The power converter is configured to convert the electric energy provided by the power grid into a form suitable for storage in the energy storage battery module.

3. The power supply replenishing device for a wide voltage range energy storage system according to claim 2, wherein It also includes a fault detection module; The fault detection module is respectively connected to the charging module and the control module.

4. The supplementary power supply device for a wide-voltage-range energy storage system according to claim 1, characterized in that The control module includes an OR unit U2 and a control unit; The OR unit U2 is respectively connected to the temperature detection module, the voltage detection module, and the control unit; The control unit is connected to the first switching module; The control unit is used to connect to the second switching module.

5. The power supply replenishing device for a wide voltage range energy storage system according to claim 4, wherein The temperature detection module includes a thermistor RT, a resistor R1, and an amplifier U1; The first end of the thermistor RT is connected to the VCC power supply, the second end is connected to the first end of the resistor R1, and the second end of the resistor R1 is grounded; The second end of the thermistor RT is connected to the non-inverting input end of the amplifier U1; The inverting input end of the amplifier U1 is connected to the Vref reference voltage; The output end of the amplifier U1 is connected to the OR unit U2.

6. The supplementary power supply device for a wide-voltage-range energy storage system according to claim 1, characterized in that It also includes an alarm module; The alarm module is connected to the control module.

7. The power supply replenishing device for a wide voltage range energy storage system according to claim 1, characterized in that, It also includes a communication module; The control module is communicatively connected to the terminal through the communication module.

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