Discharging system and energy storage equipment

Abstract

The utility model provides a discharging system and energy storage equipment. The discharging system comprises a first auxiliary power supply module, a second auxiliary power supply module and a start-stop module, the first auxiliary power supply module is respectively connected with a bus capacitor module and a start-stop module in the energy storage converter, a fourth port of the first auxiliary power supply module is connected with a control module of the energy storage converter, and the fourth port is used for outputting a first DC voltage; the second auxiliary power supply module is connected with the first power supply and the control module and is used for outputting a second direct-current voltage to the control module; the start-stop module is connected with the control module, the start-stop module comprises a resistance adjusting assembly, and the control module is used for adjusting the resistance value of the resistance adjusting assembly when it is detected that the value of the first direct-current voltage is smaller than a preset direct-current voltage value, so that the start-stop module maintains the starting state of the first auxiliary power module. The starting state of the first auxiliary power supply module can be maintained by adjusting the resistance value to cooperate with discharging of the bus capacitor module, so that the discharging efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a discharge system and energy storage equipment. Background Art

[0002] The power conversion system (PCS) can control the charging and discharging process of the energy storage device, perform AC-DC conversion, and directly supply power to the AC load in the absence of a power grid.

[0003] When inspecting the energy storage converter, in order to ensure the safety of the maintenance personnel, the energy storage converter needs to be powered off, and the maintenance can only be carried out when the voltage value of the bus capacitor module of the energy storage converter drops to a voltage value that can be detected. In the prior art, the bus capacitor module of the energy storage converter is mostly reduced in voltage through the internal resistor of the energy storage converter, which takes a long time. Utility Model Content

[0004] In view of this, the purpose of the present application is to provide a discharge system and energy storage equipment, by adjusting the resistance value of the start-stop module in the discharge system, so that the start-stop module continues to work, maintains the working state of the first auxiliary power supply module in the discharge system, and then enables the discharge system to cooperate with the energy storage inverter to discharge and improve the discharge efficiency.

[0005] In a first aspect, the present application provides a discharge system, comprising: a first auxiliary power module, a second auxiliary power module and a start-stop module;

[0006] The first port of the first auxiliary power module is respectively connected to the first port of the bus capacitor module in the energy storage converter and the first port of the start-stop module, the second port of the first auxiliary power module is connected to the second port of the bus capacitor module, the third port of the first auxiliary power module is connected to the second port of the start-stop module, the fourth port of the first auxiliary power module is connected to the control module of the energy storage converter, and the fourth port of the first auxiliary power module is used to output a first DC voltage, which is a first voltage from the bus capacitor module converted by the first auxiliary power module;

[0007] A first end of the second auxiliary power module is connected to the first power supply, a second end of the second auxiliary power module is connected to the control module, and the second end of the second auxiliary power module is used to output a second DC voltage, where the second DC voltage is a second voltage from the first power supply converted by the second auxiliary power module;

[0008] The start-stop module is connected to the control module, and the start-stop module includes a resistance adjustment component. The start-stop module is used to maintain the start state of the first auxiliary power supply module when working, or stop the first auxiliary power supply module when stopping working. The control module is used to adjust the resistance value of the resistance adjustment component when it is detected that the value of the first DC voltage is less than a preset DC voltage value, so that the start-stop module can work.

[0009] In combination with the first aspect, the start-stop module also includes a start-stop component connected in series with the resistance adjustment component, the resistance adjustment component is connected to the first port of the first auxiliary power module, and the start-stop component is connected to the third port of the first auxiliary power module.

[0010] In combination with the first aspect, the resistance adjustment component includes a first resistor, a second resistor and a relay, the first resistor and the second resistor are connected in series, and the relay is connected in parallel with the first resistor.

[0011] In combination with the first aspect, the resistance of the first resistor is within a first resistance range, the resistance of the second resistor is within a second resistance range, and the minimum resistance within the first resistance range is greater than the maximum resistance within the second resistance range.

[0012] In combination with the first aspect, the first auxiliary power supply module includes a DC / DC converter; the DC / DC converter is connected to one end of the energy storage inverter connected to the positive pole of the battery storage device through the first port of the first auxiliary power supply module, and the DC / DC converter is connected to the control module through the fourth port of the first auxiliary power supply module, and the DC / DC converter is used to convert the third voltage from the battery storage device into a third DC voltage.

[0013] In combination with the first aspect, the second auxiliary power supply module includes an AC / DC converter, the AC end of the AC / DC converter is connected to the first power supply through the first end of the second auxiliary power supply module, the DC end of the AC / DC converter is connected to the control module through the second end of the first auxiliary power supply module, and the AC / DC converter is used to convert the second voltage from the first power supply into the second DC voltage.

[0014] In combination with the first aspect, when the control module detects that the voltage value of the bus capacitor module is lower than a preset voltage value, the control module sends a power-off prompt message to the power-off indicator light, and the power-off prompt message is used to indicate that the power-off indicator light works to indicate the disconnection of the first power supply and the second auxiliary power supply module.

[0015] In combination with the first aspect, the first auxiliary power supply module further includes a first grounding port, and the first grounding port is grounded.

[0016] In combination with the first aspect, the second auxiliary power supply module further includes a second grounding port, and the second grounding port is grounded.

[0017] In a second aspect, the present application provides an energy storage device, comprising an energy storage converter and a discharge system as described in any one of the first aspects.

[0018] It can be seen that in the present application, the discharge system includes: a first auxiliary power module, a second auxiliary power module and a start-stop module, the first port of the first auxiliary power module is respectively connected to the first port of the bus capacitor module in the energy storage converter and the first port of the start-stop module, the second port of the first auxiliary power module is connected to the second port of the bus capacitor module, the third port of the first auxiliary power module is connected to the second port of the start-stop module, the fourth port of the first auxiliary power module is connected to the control module of the energy storage converter, and the fourth port is used to output a first DC voltage, which can consume the voltage in the bus capacitor module while providing the first DC voltage to the control module. The first end of the second auxiliary power module is connected to the first power supply, the second end of the second auxiliary power module is connected to the control module, and the second end of the second auxiliary power module is used to output a second DC voltage, thereby providing the second DC voltage to the control module. The start-stop module is connected to the control module, and the start-stop module includes a resistance adjustment component, the start-stop module is used to maintain the start state of the first auxiliary power module when working, or stop the first auxiliary power module when stopping working, and the control module is used to adjust the resistance value of the resistance adjustment component when detecting that the value of the first DC voltage is less than the preset DC voltage value, so that the start-stop module works. The first auxiliary power module and the second auxiliary power module of the discharge system can provide power to the control module in the energy storage converter to improve the integration of the equipment. The first auxiliary power module is connected to the bus capacitor module in the energy storage converter and can cooperate with the bus capacitor module to discharge. The resistance value of the start-stop module can be adjusted under the control of the control module, so that after the voltage of the bus capacitor module drops, the start-stop module can still work, thereby extending the startup time of the first auxiliary power module and further improving the discharge efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 is a structural schematic diagram of a discharge system provided in an embodiment of the present application;

[0021] Figure 2is a structural schematic diagram of another discharge system provided in an embodiment of the present application;

[0022] Figure 3 It is a connection diagram of an energy storage converter, a storage device and a first power supply in an energy storage device provided in an embodiment of the present application;

[0023] Figure 4 This is an example flow chart of a control method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The terms "first", "second", etc. in the specification and claims of this application and the above drawings are used to distinguish different objects rather than to describe a specific order. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusions.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The embodiments of the present application are described below with reference to the accompanying drawings.

[0028] See also Figure 1 and Figure 2 , Figure 1 is a structural schematic diagram of a discharge system provided in an embodiment of the present application; Figure 2 Schematic diagram of another discharge system provided in the embodiment of the present application. Figure 1 and Figure 2 As shown, the present application provides a discharge system, including: a first auxiliary power module 10, a second auxiliary power module 20 and a start-stop module 30.

[0029] Please combine Figure 3 , Figure 3It is a connection diagram of the energy storage converter, the energy storage device and the first power supply in the energy storage device provided in an embodiment of the present application, wherein the first port 101 of the first auxiliary power supply module is respectively connected to the first port 401 of the bus capacitor module in the energy storage converter and the first port 303 of the start-stop module, the second port 102 of the first auxiliary power supply module is connected to the second port 402 of the bus capacitor module, the third port 103 of the first auxiliary power supply module is connected to the second port 304 of the start-stop module, the fourth port 104 of the first auxiliary power supply module is connected to the control module 60 of the energy storage converter, and the fourth port 104 of the first auxiliary power supply module is used to output a first DC voltage, which is the first DC voltage converted from the bus capacitor module 40 by the first auxiliary power supply module 10.

[0030] Among them, the first end 201 of the second auxiliary power supply module is connected to the first power supply 70, the second end 202 of the second auxiliary power supply module is connected to the control module 60, and the second end 202 of the second auxiliary power supply module is used to output a second DC voltage, and the second DC voltage is a second voltage from the first power supply 70 converted by the second auxiliary power supply module 20.

[0031] Among them, the start-stop module 30 is connected to the control module 60, and the start-stop module 30 includes a resistance adjustment component 301. The start-stop module 30 is used to maintain the start state of the first auxiliary power supply module 10 when working, or stop the first auxiliary power supply module 10 when stopping working. The control module 60 is used to adjust the resistance value of the resistance adjustment component 301 when it is detected that the value of the first DC voltage is less than the preset DC voltage value, so that the start-stop module 30 can work.

[0032] Since the bus capacitor module 40 of the energy storage inverter is used to store charge and smooth the voltage to prevent voltage peaks and valleys from damaging the energy storage inverter, and at the same time provide a stable power supply to other components of the energy storage inverter, when it is necessary to detect the energy storage inverter, after disconnecting the energy storage device 50 and the first power supply 70 connected to the energy storage inverter, there is still voltage on the bus capacitor module 40.

[0033] In the specific example, please combine Figure 2, the first port 101 of the first auxiliary power module of the discharge system in the present application is connected to the first port 401 of the bus capacitor module in the energy storage converter, and the second port 102 of the first auxiliary power module is connected to the second port 402 of the bus capacitor module. Therefore, after the energy storage converter is shut down and disconnected from the energy storage device 50, the voltage in the bus capacitor module 40 can be converted by the first auxiliary power module 10 to improve the voltage reduction efficiency of the energy storage converter. The fourth port 104 of the first auxiliary power module is connected to the control module 60 of the energy storage converter, thereby providing the control module 60 with a converted DC voltage. In addition, the second end 202 of the second auxiliary power module of the discharge system is also connected to the control module 60, thereby supplying power to the control module 60, avoiding the control module 60 from stopping working when the DC voltage converted by the first auxiliary power module is insufficient, thereby improving the stability of the circuit.

[0034] Among them, the start-stop module 30 can maintain the start-up state of the first auxiliary power module 10 when working, or stop the first auxiliary power module 10 when stopping working. After the energy storage converter is shut down and disconnected from the storage device 50, the voltage of the bus capacitor module 40 will gradually decrease. In order to ensure the normal operation of the start-stop module 30, the control module 60 adjusts the resistance value of the resistance adjustment component 301 in the start-stop module 30, so that the start-stop module 30 can work normally, thereby maintaining the start-up state of the first auxiliary power module 10. Specifically, when the control module 60 detects that the value of the first DC voltage is less than the preset DC voltage value, the resistance value of the resistance adjustment component 301 is adjusted to enable the start-stop module 30 to work.

[0035] It can be seen that in this example, the start-stop module 30 is operated by adjusting the resistance value of the resistance adjustment component 301 of the start-stop module 30, thereby maintaining the start-up state of the first auxiliary power supply module 10. When the voltage of the bus capacitor module 40 is low, the discharge system can still cooperate with the bus capacitor module 40 to discharge electricity, thereby improving the discharge efficiency.

[0036] In one possible example, see Figure 2 The start-stop module 30 also includes a start-stop component 302 connected in series with the resistance adjustment component 301, the resistance adjustment component 301 is connected to the first port 101 of the first auxiliary power module, and the start-stop component 302 is connected to the third port 103 of the first auxiliary power module.

[0037] In a specific example, the start-stop module 30 includes a resistance adjustment component 301 and a start-stop component 302. The resistance adjustment component 301 is connected in series with the start-stop component 302. The resistance adjustment component 301 is connected to the first port 101 of the first auxiliary power module, and the start-stop component 302 is connected to the third port 103 of the first auxiliary power module. Therefore, after the energy storage converter is disconnected from the storage device 50, the current of the circuit where the start-stop component 302 is located is determined by the resistance value of the resistance adjustment component 301 and the voltage of the bus capacitor module 40. The start-stop component 302 is used to control the first auxiliary power module 10. Specifically, the start-stop component 302 can be a power control chip. If the minimum current required for the power control chip to work normally is a preset current, when the current of the circuit where the power control chip is located is lower than the preset current, the power control chip stops working, thereby causing the first auxiliary power module 10 to stop working. For example, if the preset current corresponding to the power control chip is 3 mA, during the process of reducing the voltage value of the bus capacitor module 40, the current of the circuit where the power control chip is located is less than 3 mA, and the power control chip stops working.

[0038] It can be seen that in this example, the start-stop component 302 controls the start and stop of the first auxiliary power supply module 10, and adjusts the resistance value through the resistance adjustment component 301, thereby maintaining the current value of the circuit where the start-stop component 302 is located, so as to maintain the normal operation of the start-stop component 302, thereby extending the working state of the first auxiliary power supply module 10, so that the discharge system can discharge the energy storage inverter in a low-voltage state.

[0039] In one possible example, see again Figure 2 The resistance adjustment component 301 includes a first resistor R1, a second resistor R2 and a relay S1, the first resistor R1 and the second resistor R2 are connected in series, and the relay S1 is connected in parallel with the first resistor R1.

[0040] In a specific example, the first resistor R1 and the second resistor R2 are connected in series, the first resistor R1 is connected to the first port 101 of the first auxiliary power module, the second resistor R2 is connected to the start-stop component 302, and the relay S1 is connected in parallel to the first resistor R1.

[0041] It can be seen that in this example, the relay S1 is connected in parallel with the first resistor R1. When the relay S1 is closed, the first resistor R1 is short-circuited, thereby reducing the resistance value of the resistance adjustment component 301, thereby achieving resistance value adjustment, making the resistance value adjustment more accurate.

[0042] In a possible example, the resistance adjustment component 301 may include multiple resistors, each of which has a different resistance value, and each resistor is respectively connected in parallel with a relay to further adjust the resistance value of the start-stop module 30 according to demand, so that the adjusted resistance value is more accurate, thereby reducing the energy consumption of the start-stop module 30.

[0043] In a possible example, the resistance of the first resistor R1 is within a first resistance range, the resistance of the second resistor R2 is within a second resistance range, and the minimum resistance within the first resistance range is greater than the maximum resistance within the second resistance range.

[0044] Specifically, the minimum resistance in the first resistance range is greater than the maximum resistance in the second resistance range, so that the resistance of the first resistor R1 is greater than the resistance of the second resistor R2, and thus after closing the relay S1 connected in parallel with the first resistor R1, the current in the start-stop module 30 can be maintained, thereby extending the working time of the start-stop module 30.

[0045] In a possible example, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 can be set according to actual needs. For example, the resistance value of the first resistor R1 and the resistance value of the second resistor R2 are the same, and no specific limitation is made here.

[0046] In a possible example, the first auxiliary power supply module 10 includes a DC / DC converter; the DC / DC converter is connected to one end of the energy storage inverter connected to the positive electrode BAT+ of the battery storage device through the first port 101 of the first auxiliary power supply module, and the DC / DC converter is connected to the control module 60 through the fourth port 104 of the first auxiliary power supply module, and the DC / DC converter is used to convert the third voltage from the battery storage device 50 into a third DC voltage.

[0047] In a specific example, the first auxiliary power supply module 10 includes a DC / DC converter, and the first port 101 of the first auxiliary power supply module is also connected to the positive electrode BAT+ of the battery storage device for powering the energy storage inverter. When the energy storage inverter does not need to discharge, the DC / DC converter can convert the third voltage from the battery storage device 50 into a third DC voltage, thereby powering the control module 60.

[0048] It can be seen that, in this example, the DC / DC converter can convert the third voltage from the battery 50 into a third DC voltage, thereby supplying power to the control module 60 and improving the integration.

[0049] In a possible example, the second auxiliary power supply module 20 includes an AC / DC converter, the AC end of the AC / DC converter is connected to the first power supply through the first end 201 of the second auxiliary power supply module, and the DC end of the AC / DC converter is connected to the control module through the second end 202 of the first auxiliary power supply module, and the AC / DC converter is used to convert the second voltage from the first power supply 70 into the second DC voltage.

[0050] It can be seen that in this example, the second auxiliary power supply module includes an AC / DC converter, which can convert AC voltage into DC voltage, that is, the second voltage from the first power supply 70 is converted into a second DC voltage through the AC / DC converter, thereby powering the control module 60 and improving the stability of the discharge system.

[0051] In a possible example, when the control module 60 detects that the voltage value of the bus capacitor module 40 is lower than a preset voltage value, the control module 60 sends a power-off prompt message to the power-off indicator light, and the power-off prompt message is used to indicate that the power-off indicator light is working to indicate the disconnection of the first power supply 70 and the second auxiliary power supply module 20.

[0052] In a specific example, if the control module 60 detects that the voltage value of the bus capacitor module 40 is lower than the preset voltage value, it proves that the voltage in the energy storage inverter has dropped to a detectable voltage, and the control module 60 sends a power-off prompt message to the power-off indicator light to prompt the disconnection of the first power supply 70 and the second auxiliary power supply module 20.

[0053] It can be seen that in this example, the indicator light is used for prompting, which saves energy and improves the user experience.

[0054] In a possible example, the first auxiliary power supply module 10 further includes a first grounding port 105, and the first grounding port 105 is grounded, thereby improving the safety of the power supply system.

[0055] In a possible example, the second auxiliary power module 20 further includes a second grounding port 203, and the second grounding port 203 is grounded, thereby improving the safety of the discharge system.

[0056] In one possible example, see again Figure 2 , the first ground port 105 and the second ground port 203 of the first auxiliary power module are connected to the ground GND, thereby improving the system integration. In a possible example, the fourth port 104 of the first auxiliary power module is connected to the control module 60 through the third diode D3, the storage device 50 is connected to the first port 101 of the first auxiliary power module through the first diode D1, and the bus capacitor module 40 is connected to the first port 101 of the first auxiliary power module through the second diode D2.

[0057] An embodiment of the present application also provides an energy storage device, which includes an energy storage converter and the discharge system as described above.

[0058] For details, please refer to Figure 3One end of the energy storage converter is connected to the battery 50, and the other end is connected to the first power source 70, which can be a power grid. The energy storage converter can convert the electric energy of the first power source 70 to charge the battery 50, or control the battery 50 to discharge, so as to supply power.

[0059] The energy storage converter includes a control module 60, a bus capacitor module 40 connected to the control module 60, a discharge module, an inverter module 90 and an AC fuse group module 80. The first port 401 of the bus capacitor module is connected to the positive electrode BAT+ of the storage battery through a DC contactor K5 and a DC fuse 1001, that is, the first port 401 of the bus capacitor module is connected to the positive power supply BUS+; the second port 402 of the bus capacitor module is connected to the negative electrode BAT- of the storage battery, that is, the second port 402 of the bus capacitor module is connected to the negative power supply BUS-. The DC contactor K5 is connected in parallel with a soft start circuit, which includes a fifth resistor R5 and a fourth diode D4 connected in series with the fifth resistor R5. The discharge module includes a third resistor R3 and a fourth resistor R4, and the bus capacitor module 40 includes a first capacitor C1 and a second capacitor C2, the third resistor R3 is connected in parallel with the first capacitor C1, and the fourth resistor R4 is connected in parallel with the second capacitor C2.

[0060] The first end of the inverter module 90 is connected to the discharge module, and the second end of the inverter module 90 is connected to the AC fuse group module 80. The AC fuse group module 80 includes a plurality of AC fuses, and a single AC fuse is connected to the first power source 70 through a relay. Figure 3 As shown, it includes a first AC fuse 801, a second AC fuse 802, a third AC fuse 803 and a fourth AC fuse 804. The first AC fuse 801 is connected to the first power supply 70 through the first grid-connected relay K1. Similarly, the second AC fuse 802 is connected to the first power supply 70 through the second grid-connected relay K2, the third AC fuse 803 is connected to the first power supply 70 through the third grid-connected relay K3, and the fourth AC fuse 804 is connected to the first power supply 70 through the fourth grid-connected relay K4.

[0061] In order to more intuitively understand the control method applied to the control module 60 of the present utility model embodiment, please refer to Figure 4 , Figure 4 is a flow chart of a control method provided in an embodiment of the present application. Figure 4 The control method shown comprises:

[0062] Step S10: stopping the energy storage converter according to the received detection instruction, and disconnecting the energy storage converter from the electrical storage device.

[0063] Among them, the control module 60 stops the energy storage converter after receiving the detection instruction, and the detection instruction represents the instruction to stop the energy storage converter. The control module 60 disconnects the connection between the energy storage converter and the battery storage 50. The first port 101 of the first auxiliary power module is connected to the end of the energy storage converter connected to the positive electrode BAT+ of the battery storage. After the control module 60 disconnects the connection between the energy storage converter and the battery storage 50, the first auxiliary power module 10 stops converting the third voltage of the battery storage 50 into the third DC voltage. Avoid the influence of the voltage of the battery storage 50 and improve the discharge efficiency.

[0064] Step S20, detecting whether the value of the first DC voltage is less than a preset DC voltage value.

[0065] The first port 101 of the first auxiliary power module is also connected to the first port 401 of the bus capacitor module in the energy storage converter and the first port 303 of the start-stop module. The first auxiliary power module 10 converts the first voltage from the bus capacitor module 40 into a first DC voltage, and determines whether the resistance value of the resistance adjustment component 301 needs to be adjusted according to the comparison result between the first DC voltage and the preset DC voltage.

[0066] If not, step S30 is executed to wait for a first preset time period.

[0067] Among them, the first preset duration can be set according to actual needs and is not specifically limited here.

[0068] If yes, step S40 is executed to close the relay.

[0069] If the value of the first DC voltage is less than the preset DC voltage value, the relay S1 is closed, thereby reducing the resistance value in the start-stop module 30, so that the start-stop module 30 works.

[0070] Step S50, detecting whether the voltage value of the bus capacitor module is less than a preset voltage value.

[0071] After the relay S1 is closed, it is detected whether the voltage value of the bus capacitor module 40 is less than the preset voltage value, and a power-off prompt message is issued in time to save energy consumption.

[0072] If not, execute step S60 to wait for a second preset time period.

[0073] If yes, step S70 is executed to send a power-off prompt message to the power-off indicator light.

[0074] The control module 60 sends a power-off prompt message to the power-off indicator light to prompt the first power supply 70 and the second auxiliary power supply module 20 to be disconnected, thereby saving energy and improving the user experience.

[0075] The control method of the embodiment of the utility model is described in detail below by taking a specific scenario as an example. For example, if the first capacitor C1 and the second capacitor C2 of the energy storage converter are 1000 microfarads respectively, and the third resistor R3 and the fourth resistor R4 are 400 kilo-ohms respectively. The first auxiliary power module 10 and the second auxiliary power module 20 of the discharge system can both receive an input voltage of 50V to 1000V, the minimum current required by the start-stop component 302 in the start-stop module 30 is 3 mA, the resistance value of the first resistor R1 is 16 kilo-ohms, and the resistance value of the second resistor R2 is 10 kilo-ohms. When the energy storage converter works normally, the relay S1 is in a normally open state. After receiving the detection instruction, the control module 60 stops the energy storage converter according to the received detection instruction, disconnects the connection between the energy storage converter and the storage device 50, and then detects whether the value of the first DC voltage is less than the preset DC voltage value. If the preset DC voltage value is 12V, if the value of the first DC voltage is less than the preset DC voltage value, the relay S1 is closed. After closing the relay S1, if it is detected that the voltage value of the bus capacitor module 40 is less than the preset voltage value, a power-off prompt message is sent to the power-off indicator light, thereby prompting to disconnect the first power supply 70 and the second auxiliary power supply module 20. If the preset voltage value is 50V, it only takes 100 seconds from the shutdown of the energy storage converter to the voltage of the bus capacitor module 40 dropping to 50V.

[0076] The embodiments of the present application are introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

[0077] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art can easily think of changes or substitutions without departing from the spirit and scope of the present application, and can make various changes and modifications, including the combination of the above-mentioned different functions and implementation steps, including software and hardware implementation methods, all of which are within the scope of protection of the present application.

Claims

1. A discharge system, characterized in that: include: A first auxiliary power module, a second auxiliary power module and a start-stop module; The first port of the first auxiliary power module is respectively connected to the first port of the bus capacitor module in the energy storage converter and the first port of the start-stop module, the second port of the first auxiliary power module is connected to the second port of the bus capacitor module, the third port of the first auxiliary power module is connected to the second port of the start-stop module, the fourth port of the first auxiliary power module is connected to the control module of the energy storage converter, and the fourth port of the first auxiliary power module is used to output a first DC voltage, which is a first voltage from the bus capacitor module converted by the first auxiliary power module; A first end of the second auxiliary power module is connected to the first power supply, a second end of the second auxiliary power module is connected to the control module, and the second end of the second auxiliary power module is used to output a second DC voltage, where the second DC voltage is a second voltage from the first power supply converted by the second auxiliary power module; The start-stop module is connected to the control module, and the start-stop module includes a resistance adjustment component. The start-stop module is used to maintain the start state of the first auxiliary power supply module when working, or stop the first auxiliary power supply module when stopping working. The control module is used to adjust the resistance value of the resistance adjustment component when it is detected that the value of the first DC voltage is less than a preset DC voltage value, so that the start-stop module can work.

2. The discharge system according to claim 1, characterized in that: The start-stop module also includes a start-stop component connected in series with the resistance adjustment component, the resistance adjustment component is connected to the first port of the first auxiliary power module, and the start-stop component is connected to the third port of the first auxiliary power module.

3. The discharge system according to claim 2, characterized in that: The resistance adjustment component includes a first resistor, a second resistor and a relay, the first resistor and the second resistor are connected in series, and the relay is connected in parallel with the first resistor.

4. The discharge system according to claim 3, characterized in that: The resistance value of the first resistor is within a first resistance range, the resistance value of the second resistor is within a second resistance range, and the minimum resistance value within the first resistance range is greater than the maximum resistance value within the second resistance range.

5. The discharge system according to any one of claims 1 to 4, characterized in that: The first auxiliary power supply module includes a DC / DC converter; The DC / DC converter is connected to one end of the energy storage inverter connected to the positive pole of the battery storage device through the first port of the first auxiliary power supply module, and the DC / DC converter is connected to the control module through the fourth port of the first auxiliary power supply module. The DC / DC converter is used to convert the third voltage from the battery storage device into a third DC voltage.

6. The discharge system according to any one of claims 1 to 4, characterized in that: The second auxiliary power supply module includes an AC / DC converter, The AC end of the AC / DC converter is connected to the first power supply through the first end of the second auxiliary power supply module, and the DC end of the AC / DC converter is connected to the control module through the second end of the first auxiliary power supply module. The AC / DC converter is used to convert the second voltage from the first power supply into the second DC voltage.

7. The discharge system according to any one of claims 1 to 4, characterized in that: When the control module detects that the voltage value of the bus capacitor module is lower than a preset voltage value, the control module sends a power-off prompt message to the power-off indicator light, and the power-off prompt message is used to indicate that the power-off indicator light works to indicate the disconnection of the first power supply and the second auxiliary power supply module.

8. The discharge system according to any one of claims 1 to 4, characterized in that: The first auxiliary power supply module also includes a first grounding port, and the first grounding port is grounded.

9. The discharge system according to any one of claims 1 to 4, characterized in that: The second auxiliary power supply module also includes a second grounding port, and the second grounding port is grounded.

10. An energy storage device, characterized in that: The energy storage device comprises an energy storage converter and a discharge system as described in any one of claims 1-9.

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