Energy storage circuit and electronic equipment

Abstract

The utility model discloses an energy storage circuit and electronic equipment, and belongs to the technical field of charging and discharging. A battery is used for outputting first direct current or charging according to second direct current; the battery management circuit is used for sampling the voltage, current and / or temperature of the battery so as to output battery data information; the control circuit is used for outputting a first switching signal and a second switching signal according to the battery data information; the direct-current switch circuit is used for transmitting direct current according to the first switch signal; the pre-charging circuit is used for carrying out current limiting and switching on the first direct current and then switching on the first direct current; the rectification inverter circuit is used for converting the first direct current into first alternating current or converting the second alternating current into second direct current; and the alternating current switch circuit is used for transmitting the first alternating current or the second alternating current according to the second switch signal, so that the topology of the energy storage circuit is optimized, the size of the integrated energy storage cabinet applying the energy storage circuit is reduced, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of charging and discharging, and particularly relates to a storage energy circuit and an electronic device. BACKGROUND

[0002] With the further widening of the peak-valley price difference in China and the decrease of the cost of lithium batteries, the economy of using industrial and commercial energy storage systems for peak-valley arbitrage is becoming more and more obvious, and industrial and commercial energy storage has become the fastest growing branch in the energy storage track.

[0003] Considering that the industrial and commercial use scenarios are mostly enterprise parks, factories and the like, the available land area is relatively limited, and the mainstream energy storage integration technical solution is to integrate the battery module, the battery management circuit, the high-voltage box, the power distribution unit, the energy storage converter, the energy management system, the cooling system, the fire-fighting system, the power distribution and the like in a single cabinet, which is called an integrated energy storage cabinet. In the design scheme of the common integrated energy storage cabinet, the battery module, the battery management circuit, the power distribution unit and the energy storage converter are respectively configured in the primary main circuit, and an alternating current (AC) main switch and an AC power supply circuit are configured on the incoming line side of the integrated energy storage cabinet. However, in actual use, the power distribution unit and the energy storage converter have the problems of redundant direct current (DC) side switches and redundant DC side pre-charging circuits in the design of the primary main circuit and the power supply circuit, and the power distribution unit has a battery management system main control board and the energy storage converter has an energy storage converter control module, resulting in a large volume of the control module, that is, there are two redundant DC switch circuits and DC side pre-charging circuits and two control modules in the integrated energy storage cabinet. Limited by the above redundant design, the existing integrated energy storage cabinet has the disadvantages of large size and high cost. SUMMARY

[0004] The application aims to provide a storage energy circuit and an electronic device, and aims to solve the problems of large size and high cost of the existing integrated energy storage cabinet.

[0005] The application embodiment provides a storage energy circuit, which comprises:

[0006] a storage energy module, configured to output a first DC current or charge according to a second DC current;

[0007] a battery management circuit, connected with the storage energy module, configured to sample a voltage, a current and / or a temperature of the storage energy module to output battery data information;

[0008] a control circuit, connected with the battery management circuit, configured to output a first switch signal and a second switch signal according to the battery data information;

[0009] a DC switch circuit, connected with the control circuit, configured to transmit the DC current according to the first switch signal;

[0010] The pre-charging circuit is connected with the direct current switching circuit, and is configured to limit and switch the first direct current first, and then switch the first direct current;

[0011] The rectifier-inverter circuit is connected with the pre-charging circuit, and is configured to convert the first direct current into first alternating current or convert second alternating current into the second direct current;

[0012] The alternating current switching circuit is connected with the rectifier-inverter circuit, and is configured to transmit the first alternating current or the second alternating current according to the second switching signal.

[0013] In one of the embodiments, the energy storage circuit further comprises:

[0014] The auxiliary power supply circuit is connected with the direct current switching circuit, the pre-charging circuit, the rectifier-inverter circuit and the alternating current switching circuit, and is configured to output the power supply direct current according to the first direct current and / or the first alternating current, or output the power supply direct current according to the second direct current and / or the second alternating current.

[0015] In one of the embodiments, the energy storage circuit further comprises:

[0016] The alternating current protection circuit is connected with the alternating current switching circuit, and is configured to protect the first alternating current or the second alternating current to output the protected first alternating current or the protected second alternating current.

[0017] In one of the embodiments, the energy storage circuit further comprises:

[0018] The voltage sampling circuit is connected with the direct current switching circuit, the inverter circuit and the control circuit, and is configured to sample the voltage of the first direct current or the voltage of the second direct current to output a voltage sampling signal.

[0019] The current sampling circuit is connected with the direct current switching circuit, the inverter circuit and the control circuit, and is configured to sample the current of the first direct current or the current of the second direct current to output a current sampling signal.

[0020] The control circuit is specifically configured to output the first switching signal, the second switching signal and a communication signal according to the battery data information, the voltage sampling signal and the current sampling signal.

[0021] In one of the embodiments, the energy storage circuit further comprises:

[0022] An overcurrent protection circuit is connected with the direct current switching circuit and the pre-charge circuit, and is configured to perform overcurrent protection on the first direct current and the second direct current to output the overcurrent-protected first direct current and the overcurrent-protected second direct current.

[0023] In one of the embodiments, the energy storage circuit further comprises:

[0024] A direct current filtering circuit is connected with the direct current switching circuit, the pre-charge circuit and the rectification and inversion circuit, and is configured to perform filtering on the first direct current and the second direct current to output the filtered first direct current and the filtered second direct current.

[0025] In one of the embodiments, the energy storage circuit further comprises:

[0026] An alternating current filtering circuit is connected with the inversion circuit and the alternating current switching circuit, and is configured to perform filtering on the first alternating current and the second alternating current to output the filtered first alternating current and the filtered second alternating current.

[0027] In one of the embodiments, the control circuit comprises a microprocessor.

[0028] The first general input and output end of the microprocessor is connected with the battery management circuit as the battery data information input end of the control circuit to input the battery data information; the second general input and output end of the microprocessor is connected with the voltage sampling circuit as the voltage sampling signal input end of the control circuit to input the voltage sampling signal; the third general input and output end of the microprocessor is connected with the current sampling circuit as the current sampling signal input end of the control circuit to input the current sampling signal; the fourth general input and output end of the microprocessor is connected with the direct current switching circuit as the first switching signal output end of the control circuit to output the first switching signal; the fifth general input and output end of the microprocessor is connected with the alternating current switching circuit as the second switching signal output end of the control circuit to output the second switching signal; and the sixth general input and output end of the microprocessor is the communication signal output end of the control circuit to output the communication signal.

[0029] In one of the embodiments, the pre-charge circuit comprises a first switch, a second switch and a first resistor.

[0030] The first end of the first switch and the first end of the second switch are collectively used as an input end of the first direct current and are connected with the direct current switch circuit to input the first direct current; the second end of the second switch and the first end of the first resistor are connected, and the second end of the first switch and the second end of the first resistor are collectively used as an output end of the first direct current and are connected with the rectification inversion circuit to output the first direct current.

[0031] The electronic device provided by the embodiment of the present application comprises the energy storage circuit.

[0032] Compared with the prior art, the embodiment of the present application has the beneficial effects that: the battery management circuit samples the voltage, current and / or temperature of the energy storage module and outputs battery data information, the control circuit outputs the first switch signal and the second switch signal according to the battery data information, the voltage, current and / or temperature of the energy storage module is monitored, the control circuit and the original energy storage converter control module in the energy storage converter in the control circuit are integrated in one control system, the battery management system main control board in the power distribution unit is saved, the direct current side switch and the direct current side pre-charging circuit in the power distribution unit are also saved, only one direct current switch circuit is used to transmit the direct current, and one direct current side pre-charging circuit is used to limit the current and switch the first direct current and then switch the first direct current, so that the topology of the energy storage circuit is optimized, the size of the integrated energy storage cabinet using the energy storage circuit is reduced, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical application in the embodiment of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 A structural schematic diagram of the energy storage circuit provided by an embodiment of the present application;

[0035] Figure 2 Another structural schematic diagram of the energy storage circuit provided by an embodiment of the present application;

[0036] Figure 3 Another structural schematic diagram of the energy storage circuit provided by an embodiment of the present application;

[0037] Figure 4 Another structural schematic diagram of the energy storage circuit provided by an embodiment of the present application;

[0038] Figure 5Another structural schematic diagram of the energy storage circuit provided by an embodiment of the present application is shown.

[0039] Figure 6 Another structural schematic diagram of the energy storage circuit provided by an embodiment of the present application is shown.

[0040] Figure 7 Another structural schematic diagram of the energy storage circuit provided by an embodiment of the present application is shown.

[0041] Figure 8 A partial example circuit schematic diagram of the energy storage circuit provided by an embodiment of the present application is shown. DETAILED DESCRIPTION

[0042] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0044] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0045] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0046] Figure 1 A structural schematic diagram of the energy storage circuit provided by an embodiment of the present application is shown. For ease of description, only parts related to the present embodiment are shown, and are described in detail as follows:

[0047] The energy storage circuit includes an energy storage module 10 , a battery management circuit 20 , a control circuit 30 , a DC switching circuit 40 , a pre-charging circuit 50 , a rectifier and inverter circuit 60 , and an AC switching circuit 70 .

[0048] The energy storage module 10 is configured to output a first direct current, or to be charged according to a second direct current.

[0049] The battery management circuit 20 is connected to the energy storage module 10 and is used to sample the voltage, current and / or temperature of the energy storage module 10 to output battery data information.

[0050] The control circuit 30 is connected to the battery management circuit 20 and is configured to output a first switching signal and a second switching signal according to battery data information.

[0051] The DC switching circuit 40 is connected to the control circuit 30 and is configured to transmit DC power according to the first switching signal.

[0052] The pre-charging circuit 50 is connected to the DC switching circuit 40 and is used to first limit and transfer the first DC power and then transfer the first DC power.

[0053] The rectifier and inverter circuit 60 is connected to the pre-charging circuit 50 and is used to convert the first direct current into the first alternating current or convert the second alternating current into the second direct current.

[0054] The AC switching circuit 70 is connected to the rectifier and inverter circuit 60 and is configured to transmit the first AC power or the second AC power according to the second switching signal.

[0055] The energy storage module 10 may be a battery.

[0056] It should be noted that the battery management circuit 20 can obtain the battery state of charge and battery health status of the current energy storage module 10 based on the sampled voltage and current, and then output battery data information; the control circuit 30 can determine the current state of the energy storage module 10 based on the received battery data information, thereby stopping the output of the first switching signal and the second switching signal when the energy storage module 10 is at high or low temperature, overvoltage, undervoltage or other fault conditions, the DC switching circuit 40 is disconnected according to the stopping of the first switching signal, and the AC switching circuit 70 is disconnected according to the stopping of the second switching signal, thereby protecting the energy storage circuit.

[0057] It is understandable that, in actual use, the energy storage module 10 may be a battery, and the number of batteries may be configured according to the first DC voltage actually required to be output.

[0058] The battery management circuit 20 samples the voltage, current and / or temperature of the energy storage module 10 and outputs battery data information. The control circuit 30 outputs first and second switch signals according to the battery data information, thereby monitoring the voltage, current and / or temperature of the energy storage module 10. The control circuit 30 and the original energy storage converter control module in the energy storage converter are integrated in one control system, thereby eliminating the battery management system main control board in the power distribution unit and the DC side switch and DC side pre-charging circuit in the power distribution unit. Only one DC switch circuit 40 is needed to transmit DC power, and a DC side pre-charging circuit 50 is used to limit the current and switch the first DC power, thereby optimizing the topology of the energy storage circuit, reducing the size of the integrated energy storage cabinet using the energy storage circuit, and reducing the cost.

[0059] As an example but not limitation, as shown in Figure 2 The energy storage circuit further includes an auxiliary power supply circuit 80.

[0060] The auxiliary power supply circuit 80 is connected with the DC switch circuit 40, the pre-charging circuit 50, the rectifier-inverter circuit 60 and the AC switch circuit 70, and is used to output power supply DC power according to the first DC power and / or the first AC power, or output power supply DC power according to the second DC power and / or the second AC power.

[0061] By adding the auxiliary power supply circuit 80, when the AC side voltage or the DC side voltage is within the design voltage range of the auxiliary power supply circuit 80, the auxiliary power supply circuit 80 can always output power supply DC power for auxiliary power supply, thereby eliminating the need for additional uninterruptible power supply in the integrated energy storage cabinet for auxiliary power supply, further reducing the size of the integrated energy storage cabinet using the energy storage circuit, and reducing the cost.

[0062] As an example but not limitation, as shown in Figure 3 The energy storage circuit further includes an AC protection circuit 90.

[0063] The AC protection circuit 90 is connected with the AC switch circuit 70, and is used to protect the first AC power or the second AC power to output the protected first AC power or the protected second AC power.

[0064] The AC protection circuit 90 improves the safety and reliability of the energy storage circuit.

[0065] As an example but not limitation, as shown in Figure 4 The energy storage circuit further includes a voltage sampling circuit 100 and a current sampling circuit 110.

[0066] The voltage sampling circuit 100 is connected to the DC switching circuit 40 , the inverter circuit and the control circuit 30 , and is used to sample the voltage of the first DC power or the voltage of the second DC power to output a voltage sampling signal.

[0067] The current sampling circuit 110 is connected to the DC switching circuit 40 , the inverter circuit and the control circuit 30 , and is used to sample the current of the first DC power or the current of the second DC power to output a current sampling signal.

[0068] The control circuit 30 is specifically configured to output a first switching signal, a second switching signal, and a communication signal according to the battery data information, the voltage sampling signal, and the current sampling signal.

[0069] In a specific implementation, the control circuit 30 can also detect the DC switch circuit ( Figure 4 Not shown) in the DC contactor, the AC switch circuit ( Figure 4 The status of the AC contactor and the overcurrent protection circuit (not shown) Figure 4 The controller 30 can output a rectifier control signal or an inverter control signal to the drive circuit 30 based on the status of the fuse in the control circuit 30, and output a communication signal to the host computer in combination with the control circuit 30's own parameters, battery data information, voltage sampling signal and current sampling signal. In addition, the host computer can also output a scheduling instruction to the control circuit 30, and the control circuit 30 can output a rectifier control signal or an inverter control signal to the drive circuit 30 based on the scheduling instruction. Figure 4 (not shown), the driving circuit drives the rectifier inverter circuit 60 to rectify according to the rectifier control signal to realize charging of the energy storage module 10, or drives the rectifier inverter circuit 60 to invert according to the inversion control signal to realize discharging of the energy storage module 10.

[0070] When the voltage sampling signal and / or the current sampling signal exceeds a preset range, the control circuit 30 stops outputting the first switching signal and the second switching signal, thereby protecting the energy storage circuit.

[0071] By way of example and not limitation, Figure 5 As shown, the energy storage circuit further includes an overcurrent protection circuit 120 .

[0072] The overcurrent protection circuit 120 is connected to the DC switch circuit 40 and the pre-charging circuit 50, and is used to perform overcurrent protection on the first DC power and the second DC power, so as to output the first DC power and the second DC power after overcurrent protection.

[0073] The overcurrent protection circuit 120 further improves the safety of the energy storage circuit.

[0074] By way of example and not limitation, Figure 6 As shown, the energy storage circuit further includes a DC filter circuit 130 .

[0075] The direct-current filter circuit 130 is connected with the direct-current switch circuit 40, the pre-charge circuit 50 and the rectification and inversion circuit 60, and is configured to filter the first direct current and the second direct current to output the filtered first direct current and the filtered second direct current.

[0076] The peak voltage in the direct current is filtered by the direct-current filter circuit 130, and the stability of the energy storage circuit is improved.

[0077] As an example but not limitation, as shown in Figure 7 The energy storage circuit further includes an alternating-current filter circuit 140.

[0078] The alternating-current filter circuit 140 is connected with the inversion circuit and the alternating-current switch circuit 70, and is configured to filter the first alternating current and the second alternating current to output the filtered first alternating current and the filtered second alternating current.

[0079] The harmonic in the alternating current is suppressed by the alternating-current filter circuit 140, and the working reliability and stability of the energy storage circuit are improved.

[0080] Figure 8 A partial example circuit structure of the energy storage circuit provided by the embodiment of the present application is shown, and only the part related to the embodiment of the present application is shown for the convenience of description, and the details are as follows:

[0081] The first direct current and the second direct current are transmitted through a direct-current bus, and the direct-current bus includes a positive direct-current bus and a negative direct-current bus.

[0082] The first alternating current and the second alternating current are both three-phase alternating currents, and are transmitted through three-phase lines, and the three-phase lines include an A-phase line, a B-phase line and a C-phase line.

[0083] The control circuit 30 includes a microprocessor U1.

[0084] The first general input and output terminal P1.0 of the microprocessor U1 serves as the battery data information input terminal of the control circuit 30 and is connected to the battery management circuit 20 to input battery data information; the second general input and output terminal P1.1 of the microprocessor U1 serves as the voltage sampling signal input terminal of the control circuit 30 and is connected to the voltage sampling circuit 100 to input the voltage sampling signal; the third general input and output terminal P1.2 of the microprocessor U1 serves as the current sampling signal input terminal of the control circuit 30 and is connected to the current sampling circuit 110 to input the current sampling signal; the fourth general input and output terminal P2.0 of the microprocessor U1 serves as the first switching signal output terminal of the control circuit 30 and is connected to the DC switching circuit 40 to output the first switching signal; the fifth general input and output terminal P2.1 of the microprocessor U1 serves as the second switching signal output terminal of the control circuit 30 and is connected to the AC switching circuit 70 to output the second switching signal; the sixth general input and output terminal P2.2 of the microprocessor U1 serves as the communication signal output terminal of the control circuit 30 to output the communication signal.

[0085] The microprocessor has a high level of integration, which improves the convenience of use.

[0086] The pre-charging circuit 50 includes a first switch S3 , a second switch S4 , and a first resistor R1 .

[0087] The first end of the first switch S3 and the first end of the second switch S4 serve together as an input end of the first DC power and are connected to the DC switching circuit 40 to input the first DC power; the second end of the second switch S4 is connected to the first end of the first resistor R1, and the second end of the first switch S3 and the second end of the first resistor R1 serve together as an output end of the first DC power and are connected to the rectifier inverter circuit 60 to output the first DC power.

[0088] The pre-charging circuit 50 is simple and reliable.

[0089] The DC switching circuit 40 includes a first DC contactor S1 and a second DC contactor S2 .

[0090] The first end of the first DC contactor S1 is connected with the positive DC bus as the first DC input end of the DC switching circuit 40 and the second DC output end of the DC switching circuit 40, so as to input the first DC or output the second DC; the second end of the first DC contactor S1 is connected with the positive DC bus as the first DC output end of the DC switching circuit 40 and the second DC input end of the DC switching circuit 40, so as to output the first DC or input the second DC; the first end of the second DC contactor S2 is connected with the negative DC bus as the first DC input end of the DC switching circuit 40 and the second DC output end of the DC switching circuit 40, so as to output the first DC or input the second DC; the second end of the second DC contactor S2 is connected with the negative DC bus as the first DC output end of the DC switching circuit 40 and the second DC input end of the DC switching circuit 40, so as to output the first DC or input the second DC; the control end of the first DC contactor S1 and the control end of the second DC contactor S2 are connected with the control circuit 30 as the first switch signal input end of the DC switching circuit 40, so as to input the first switch signal.

[0091] The overcurrent protection circuit 120 comprises a fuse F1.

[0092] The first end of the fuse F1 is connected with the positive DC bus as the first DC input end of the overcurrent protection circuit 120 and the second DC output end of the overcurrent protection circuit 120, so as to input the first DC or output the second DC; the second end of the fuse F1 is connected with the positive DC bus as the first DC output end of the overcurrent protection circuit 120 and the second DC input end of the overcurrent protection circuit 120, so as to output the first DC or input the second DC.

[0093] The DC filtering circuit 130 comprises a first capacitor C1.

[0094] The first end of the first capacitor C1 is connected with the positive DC bus, the second end of the first capacitor C1 is connected with the negative DC bus, and the first end of the first capacitor C1 and the second end of the first capacitor C1 are connected as the first DC input end of the DC filtering circuit 130, the second DC input end of the DC filtering circuit 130, the filtered first DC output end of the DC filtering circuit 130, and the filtered second DC output end of the DC filtering circuit 130, so as to input the first DC and the second DC and output the filtered first DC and the filtered second DC.

[0095] The AC switching circuit 70 comprises a first AC contactor S5, a second AC contactor S6, and a third AC contactor S7.

[0096] The first AC contactor S5 is connected in series to the A-phase line, the second AC contactor S6 is connected in series to the B-phase line, and the third AC contactor S7 is connected in series to the B-phase line. The control end of the first AC contactor S5, the control end of the second AC contactor S6, and the control end of the third AC contactor S7 are collectively used as a second switch signal input end of the AC switch circuit 70, and are connected with the control circuit 30 to input a second switch signal.

[0097] The AC protection circuit 90 includes a first AC circuit breaker QF1, a second AC circuit breaker QF2, and a third AC circuit breaker QF3.

[0098] The first AC circuit breaker QF1 is connected in series to the A-phase line, the second AC circuit breaker QF2 is connected in series to the B-phase line, and the third AC circuit breaker QF3 is connected in series to the B-phase line.

[0099] The working principle is further described below in combination with the drawings: Figure 8

[0100] ​During rectification, the energy storage module 10 outputs the first DC power to the first terminal of the first DC contactor S1 and the first terminal of the second DC contactor S2. The battery management circuit 20 samples the voltage, current and / or temperature of the energy storage module 10 and outputs battery data information to the first universal input and output terminal P1.0 of the microprocessor U1. The voltage sampling circuit 100 samples the voltage of the first DC power and outputs a voltage sampling signal to the second universal input and output terminal P1.1 of the microprocessor U1. The current sampling circuit 110 samples the current of the first DC power and outputs a current sampling signal. The microprocessor U1 outputs a first switching signal from the fourth general input and output terminal P2.0 of the microprocessor U1 to the control terminal of the first DC contactor S1 and the control terminal of the second DC contactor S2 based on the battery data information, the voltage sampling signal and the current sampling signal. The microprocessor U1 also outputs a second switching signal from the fifth general input and output terminal P2.1 of the microprocessor U1 to the control terminal of the first AC contactor S5, the control terminal of the second AC contactor S6 and the control terminal of the third AC contactor S7; the first The DC contactor S1 and the second DC contactor S2 transmit the first DC power to the first end of the fuse F1 according to the first switching signal. The fuse F1 performs overcurrent protection on the first DC power and outputs the first DC power after overcurrent protection from the second end of the fuse F1 to the first end of the first switch S3 and the first end of the second switch S4. The second switch S4 is closed, the first resistor R1 limits the current of the first DC power and outputs the first DC power after current limiting from the second end of the first resistor R1. After the first DC voltage reaches a preset threshold, the second switch S4 is disconnected, the first switch S3 is closed, and the transmission The first DC power is transmitted to the rectifier and inverter circuit 60. The rectifier and inverter circuit 60 rectifies the first DC power and outputs the first AC power. The AC filter circuit 140 filters the first AC power and outputs the filtered first AC power to the first AC contactor S5, the second AC contactor S6, and the third AC contactor S7. The first AC contactor S5, the second AC contactor S6, and the third AC contactor S7 transmit the first AC power according to the second switching signal. The first AC power is output through the first AC circuit breaker QF1, the second AC circuit breaker QF2, and the third AC circuit breaker QF3.

[0101] When the inverter is performed, the battery management circuit 20 samples the voltage, the current and / or the temperature of the energy storage module 10, outputs the battery data information to the first general input / output terminal P1.0 of the microprocessor U1, the microprocessor U1 outputs the first switch signal from the fourth general input / output terminal P2.0 of the microprocessor U1 to the control terminal of the first direct current contactor S1 and the control terminal of the second direct current contactor S2 based on the battery data information, the microprocessor U1 also outputs the second switch signal from the fifth general input / output terminal P2.1 of the microprocessor U1 to the control terminal of the first alternating current contactor S5, the control terminal of the second alternating current contactor S6 and the control terminal of the third alternating current contactor S7, the second alternating current is input to the first alternating current contactor S5, the second alternating current contactor S6 and the third alternating current contactor S7 through the first alternating current breaker QF1, the second alternating current breaker QF2 and the third alternating current breaker QF3, the alternating current filter circuit 140 filters the second alternating current to output the filtered second alternating current to the rectification and inverter circuit 60, the rectification and inverter circuit 60 inverts the second alternating current to output the second direct current to the second terminal of the first switch S3, the second terminal of the first resistor R1 and the first terminal of the second resistor, the first switch S3 transmits the second direct current to the second terminal of the fuse F1, the fuse F1 transmits the second direct current to the second terminal of the first direct current contactor S1, the first direct current contactor S1 and the second direct current contactor S2 output the second direct current to the energy storage module 10 to charge, the voltage sampling circuit 100 samples the voltage of the second direct current to output the voltage sampling signal to the second general input / output terminal P1.1 of the microprocessor U1, the current sampling circuit 110 samples the current of the second direct current to output the current sampling signal to the third general input / output terminal P1.2 of the microprocessor U1, the microprocessor U1 specifically outputs the first switch signal from the fourth general input / output terminal P2.0 of the microprocessor U1 based on the battery sampling information, the voltage sampling signal and the current sampling signal to control the first direct current contactor S1 and the second direct current contactor S2.

[0102] The embodiment of the present application also provides an electronic device, which comprises the energy storage circuit.

[0103] It should be understood that the size of the serial number of each step in the above embodiment does not mean the order of execution, the execution order of each process should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0104] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part 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 embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A tank circuit, characterized in that: include: an energy storage module, configured to output a first direct current, or to be charged according to a second direct current; a battery management circuit, connected to the energy storage module, for sampling the voltage, current and / or temperature of the energy storage module to output battery data information; a control circuit, connected to the battery management circuit, and configured to output a first switching signal and a second switching signal according to the battery data information; a DC switching circuit, connected to the control circuit, and configured to transmit the DC power according to the first switching signal; a pre-charging circuit, connected to the DC switching circuit, configured to first limit and transfer the first DC power, and then transfer the first DC power; a rectifier inverter circuit, connected to the pre-charging circuit, configured to convert the first direct current into a first alternating current or convert the second alternating current into the second direct current; An AC switching circuit is connected to the rectifier inverter circuit and is used to transmit the first AC power or the second AC power according to the second switching signal.

2. The energy storage circuit according to claim 1, wherein: Also includes: An auxiliary power supply circuit is connected to the DC switching circuit, the pre-charging circuit, the rectifier inverter circuit and the AC switching circuit, and is used to output the power supply DC according to the first DC power and / or the first AC power, or to output the power supply DC according to the second DC power and / or the second AC power.

3. The energy storage circuit according to claim 1, wherein: Also includes: An AC protection circuit is connected to the AC switch circuit and is used to protect the first AC power or the second AC power to output the protected first AC power or the protected second AC power.

4. The energy storage circuit according to claim 1, wherein: Also includes: a voltage sampling circuit, connected to the DC switching circuit, the inverter circuit, and the control circuit, and configured to sample the voltage of the first DC power or the voltage of the second DC power to output a voltage sampling signal; a current sampling circuit, connected to the DC switching circuit, the inverter circuit, and the control circuit, and configured to sample the current of the first DC power or the current of the second DC power to output a current sampling signal; The control circuit is specifically configured to output the first switch signal, the second switch signal, and a communication signal according to the battery data information, the voltage sampling signal, and the current sampling signal.

5. The energy storage circuit according to claim 1, wherein: Also includes: An overcurrent protection circuit is connected to the DC switching circuit and the pre-charging circuit, and is used to perform overcurrent protection on the first DC power and the second DC power, so as to output the first DC power after overcurrent protection and the second DC power after overcurrent protection.

6. The energy storage circuit according to claim 1, wherein: Also includes: A DC filter circuit is connected to the DC switching circuit, the pre-charging circuit and the rectifier inverter circuit, and is used to filter the first DC power and the second DC power to output the filtered first DC power and the filtered second DC power.

7. The energy storage circuit according to claim 1, wherein: Also includes: The AC filter circuit is connected to the inverter circuit and the AC switch circuit, and is used to filter the first AC power and the second AC power to output the filtered first AC power and the filtered second AC power.

8. The energy storage circuit according to claim 1, wherein: The control circuit includes a microprocessor; The first general input / output terminal of the microprocessor serves as the battery data information input terminal of the control circuit and is connected to the battery management circuit to input the battery data information; the second general input / output terminal of the microprocessor serves as the voltage sampling signal input terminal of the control circuit and is connected to the voltage sampling circuit to input the voltage sampling signal; The third general input / output terminal of the microprocessor serves as the current sampling signal input terminal of the control circuit and is connected to the current sampling circuit to input the current sampling signal; The fourth general input / output terminal of the microprocessor serves as the first switch signal output terminal of the control circuit and is connected to the DC switch circuit to output the first switch signal; The fifth general input / output terminal of the microprocessor serves as the second switch signal output terminal of the control circuit and is connected to the AC switch circuit to output the second switch signal; The sixth general input and output terminal of the microprocessor serves as the communication signal output terminal of the control circuit to output a communication signal.

9. The energy storage circuit according to claim 1, wherein: The pre-charging circuit includes a first switch, a second switch and a first resistor; The first end of the first switch and the first end of the second switch serve together as an input end of the first DC power and are connected to the DC switching circuit to input the first DC power; the second end of the second switch is connected to the first end of the first resistor, and the second end of the first switch and the second end of the first resistor serve together as an output end of the first DC power and are connected to the rectifier inverter circuit to output the first DC power.

10. An electronic device, characterized in that: Comprising the energy storage circuit according to any one of claims 1 to 9.

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