Energy recovery method and device of vehicle-mounted charger and electronic equipment

Abstract

The invention provides an energy recovery method and device of a vehicle-mounted charger and electronic equipment, and the method comprises the steps that the vehicle-mounted charger outputs direct current; if the voltage of the direct current is smaller than a preset first threshold value, the voltage of the direct current is increased to a first value through a first tool, so that the direct current with the increased voltage flows into an alternating current power grid; wherein the first value is greater than the voltage of the AC power grid; if the voltage of the direct current is larger than a preset second threshold value, the voltage of the direct current is reduced to a second value through a second tool, so that the direct current with the reduced voltage flows into the alternating current power grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the AC power grid. In the mode, the vehicle-mounted charger can be used for energy recovery, and the energy generated by the vehicle-mounted charger during the aging test is recovered, so that the purpose of saving energy is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of commercial kitchen fire extinguishing, and in particular to an energy recovery method, device and electronic equipment for a vehicle-mounted charger. Background Art

[0002] At present, aging tests mainly refer to thermal oxygen aging tests for rubber, plastic products, electrical insulation materials and other materials; or ventilation aging tests for electronic parts and plastic products. The on-board charger needs to be aging tested before leaving the factory. During the aging test, the on-board charger will be started multiple times, which will cause certain energy waste and loss. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an energy recovery method, device and electronic equipment for a vehicle charger, so as to utilize the vehicle charger for energy recovery and recover the energy generated by the vehicle charger during aging testing, thereby achieving the purpose of saving energy.

[0004] In a first aspect, an embodiment of the present invention provides an energy recovery method for an on-board charger, the method comprising: the on-board charger outputs direct current; if the voltage of the direct current is less than a preset first threshold, the voltage of the direct current is increased to a first value by a first tooling, so that the direct current current with the increased voltage enters an alternating current power grid; wherein the first value is greater than the voltage of the alternating current power grid; if the voltage of the direct current is greater than a preset second threshold, the voltage of the direct current is reduced to a second value by a second tooling, so that the direct current current with the reduced voltage enters the alternating current power grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the alternating current power grid.

[0005] In an optional embodiment of the present application, after the step in which the voltage of the above-mentioned DC power is greater than a preset second threshold value, the method also includes: determining the output power of the DC power output by the on-board charger; if the output power corresponds to the rated power of the second tooling, dividing the DC power into a first DC power and a second DC power; wherein the power of the first DC power is the rated power; reducing the voltage of the first DC power to a second value through the second tooling, so that the first DC current after the voltage is reduced enters the AC power grid; adjusting the voltage of the second DC power to the first value through the first tooling, so that the second DC current after the voltage is adjusted enters the AC power grid.

[0006] In an optional embodiment of the present application, the first output terminal of the above-mentioned on-board charger, the first tooling and the AC power grid are connected in sequence; the second output terminal of the on-board charger, the second tooling and the AC power grid are connected in sequence.

[0007] In an optional embodiment of the present application, the step of increasing the voltage of the DC power to a first value through the first tooling if the voltage of the DC power is less than the preset first threshold value includes: if the voltage of the DC power is less than the preset first threshold value, the first output terminal of the vehicle charger outputs DC power to the first tooling; and increasing the voltage of the DC power to the first value through the first tooling.

[0008] In an optional embodiment of the present application, the above-mentioned step of reducing the voltage of the DC power to a second value through the second tooling if the voltage of the DC power is greater than the preset second threshold value includes: if the voltage of the DC power is greater than the preset second threshold value, the second output terminal of the on-board charger outputs DC power to the second tooling; and reducing the voltage of the DC power to the second value through the second tooling.

[0009] In an optional embodiment of the present application, a first node is provided in the connection path between the second output terminal of the above-mentioned on-board charger and the second tooling, and the first node, the relay and the first tooling are connected in sequence; the step of dividing the DC power into the first DC power and the second DC power includes: dividing the DC power into the first DC power and the second DC power through a relay.

[0010] In an optional embodiment of the present application, the loop control of the above-mentioned first tooling adopts a dual-loop competition method of a voltage loop and a current loop.

[0011] In an optional embodiment of the present application, the above-mentioned second tooling includes: a first power factor correction circuit, a first resonant circuit and a target circuit; wherein a second power factor correction circuit and a second resonant circuit are arranged in the target circuit.

[0012] In a second aspect, an embodiment of the present invention further provides an energy recovery device for a vehicle-mounted charger, the device comprising: an on-board charger output module, for the on-board charger to output direct current; a first tooling processing module, for increasing the voltage of the direct current to a first value through the first tooling if the voltage of the direct current is less than a preset first threshold value, so that the direct current current with the increased voltage enters the alternating current power grid; wherein the first value is greater than the voltage of the alternating current power grid; a second tooling processing module, for reducing the voltage of the direct current to a second value through the second tooling if the voltage of the direct current is greater than a preset second threshold value, so that the direct current current with the reduced voltage enters the alternating current power grid; wherein the second threshold value is greater than or equal to the first threshold value, and the second value is greater than the voltage of the alternating current power grid.

[0013] In a third aspect, an embodiment of the present invention further provides an electronic device, the electronic device comprising a processor and a memory, the memory storing computer executable instructions that can be executed by the processor, and the processor executing the computer executable instructions to implement the above-mentioned energy recovery method of the on-board charger.

[0014] The embodiments of the present invention bring the following beneficial effects:

[0015] The embodiment of the present invention provides an energy recovery method, device and electronic device for an on-board charger, wherein the on-board charger outputs direct current; if the voltage of the direct current is less than a preset first threshold, the voltage of the direct current is increased to a first value by a first tool, so that the direct current after the voltage is increased enters the alternating current grid; wherein the first value is greater than the voltage of the alternating current grid; if the voltage of the direct current is greater than a preset second threshold, the voltage of the direct current is reduced to a second value by a second tool, so that the direct current after the voltage is reduced enters the alternating current grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the alternating current grid. In this manner, the on-board charger can be used for energy recovery, and the energy generated by the on-board charger during the aging test can be recovered, thereby achieving the purpose of energy saving.

[0016] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0017] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A flow chart of an energy recovery method for a vehicle charger provided by an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of an energy recovery method for a vehicle charger provided by an embodiment of the present invention;

[0021] Figure 3 A schematic structural diagram of a second tooling provided by an embodiment of the present invention;

[0022] Figure 4 A schematic diagram of a PFC-level loop in a grid-connected mode of a second tooling provided in an embodiment of the present invention;

[0023] Figure 5 A schematic structural diagram of a first tooling provided by an embodiment of the present invention;

[0024] Figure 6A schematic diagram of the structure of an energy recovery device for a vehicle charger provided by an embodiment of the present invention;

[0025] Figure 7 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] At present, aging tests mainly refer to thermal oxygen aging tests for rubber, plastic products, electrical insulation materials and other materials; or ventilation aging tests for electronic parts and plastic products. The on-board charger needs to be aging tested before leaving the factory. During the aging test, the on-board charger will be started multiple times, which will cause certain energy waste and loss.

[0028] Based on this, an energy recovery method, device and electronic device for a vehicle charger provided in an embodiment of the present invention can utilize the vehicle charger for energy recovery, recovering the energy generated by the vehicle charger during aging testing, thereby achieving the purpose of saving energy.

[0029] To facilitate understanding of this embodiment, an energy recovery method for a vehicle charger disclosed in an embodiment of the present invention is first introduced in detail.

[0030] Embodiment 1:

[0031] The embodiment of the present invention provides an energy recovery method for a vehicle charger. Figure 1 The flowchart of an energy recovery method of an on-board charger is shown, and the energy recovery method of the on-board charger comprises the following steps:

[0032] Step S102: the on-board charger outputs direct current.

[0033] See also Figure 2 A schematic diagram of an energy recovery method for an on-board charger is shown, wherein the first output terminal (i.e. Figure 2 OBC output terminal in the first tooling and AC power grid (i.e. Figure 2 The AC power grid in the vehicle) is connected in sequence; the second output terminal of the on-board charger (i.e. Figure 2 The DC output end in the second tooling and the AC power grid are connected in sequence.

[0034] like Figure 2 As shown, the on-board charger of this embodiment can output direct current from the OBC output and / or DC output. The energy recovery method of the on-board charger provided in this embodiment can be applied to output direct current from a single OBC output terminal, output direct current from a single DC output terminal, or output direct current from both the OBC output terminal and the DC output terminal.

[0035] Step S104, if the voltage of the DC power is less than a preset first threshold, the voltage of the DC power is increased to a first value by a first tool, so that the DC current with the increased voltage enters the AC power grid; wherein the first value is greater than the voltage of the AC power grid.

[0036] If the voltage of the direct current is less than a preset first threshold value, energy recovery can be performed through the first tooling.

[0037] In some embodiments, if the voltage of the direct current is less than a preset first threshold, the first output terminal of the on-board charger outputs direct current to the first tooling; and the voltage of the direct current is increased to a first value through the first tooling.

[0038] like Figure 2 As shown, if the voltage of the direct current is less than the preset first threshold, it corresponds to the situation where the single DC output terminal outputs direct current as mentioned above. The on-board charger outputs low-voltage direct current (which can be called LV low voltage) that is less than the preset first threshold from the DC output terminal. The first tooling can reversely pre-charge the LV low voltage and convert the LV low voltage into HV high voltage, that is, the voltage of the direct current is increased to the first value. The OBC of the first tooling can control the HV high voltage to be lower than the high voltage of the DC inverter, so that there is a voltage difference, so that energy flows from the first tooling into the AC power grid to achieve energy recovery.

[0039] Step S106, if the voltage of the DC power is greater than a preset second threshold, the voltage of the DC power is reduced to a second value by a second tooling so that the DC current with reduced voltage enters the AC power grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the AC power grid.

[0040] If the voltage of the direct current is greater than a preset second threshold value, energy recovery can be performed through the second tooling.

[0041] In some embodiments, if the voltage of the direct current is greater than a preset second threshold, the second output terminal of the on-board charger outputs direct current to the second tooling; and the voltage of the direct current is reduced to a second value through the second tooling.

[0042] like Figure 2As shown, if the voltage of the DC power is greater than the preset second threshold, it corresponds to the case where the single OBC output terminal outputs DC power. The on-board charger outputs high-voltage DC power (which can be called HV voltage) greater than the preset second threshold from the DC output terminal. The second tooling can control the HV voltage to drop to a second value so that there is a voltage difference, so that energy flows from the second tooling into the AC power grid to achieve energy recovery.

[0043] In this embodiment, in addition to the above-mentioned situation where the single DC output terminal outputs direct current and the single OBC output terminal outputs direct current, there may also be a situation where the OBC output terminal and the DC output terminal jointly output direct current.

[0044] In some embodiments, the output power of the DC power output by the on-board charger can also be determined; if the output power corresponds to the rated power of the second tooling, the DC power is divided into a first DC power and a second DC power; wherein the power of the first DC power is the rated power; the voltage of the first DC power is reduced to a second value by the second tooling, so that the first DC current after the voltage is reduced enters the AC power grid; the voltage of the second DC power is adjusted to the first value by the first tooling, so that the second DC current after the voltage is adjusted enters the AC power grid.

[0045] This embodiment can utilize the aging energy output by the second fixture to recover the OBC output terminal, and utilize the aging energy output by the first fixture to recover the DC output terminal. When the output power of the on-board charger exceeds the rated power capacity of the second fixture, the second fixture and the first fixture can be connected in parallel through a relay, and the OBC of the first fixture can share part of the power from the HV voltage, thereby increasing the overall load and energy recovery capacity.

[0046] In some embodiments, a first node is provided in the connection path between the second output terminal of the vehicle charger and the second tooling, and the first node, the relay and the first tooling are connected in sequence; the step of dividing the DC power into the first DC power and the second DC power includes: dividing the DC power into the first DC power and the second DC power through the relay.

[0047] like Figure 2 As shown, the first fixture and the second fixture can be connected in parallel as an inverter for OBC output, and the first fixture can also be used as an inverter for DC output.

[0048] When the output voltage of the on-board charger is less than 460V, the relay K1 is closed, and the second fixture and the first fixture are connected in parallel, and can be used together as an inverter for OBC output.

[0049] When the output voltage of the on-board charger is greater than 460V, the relay K1 is disconnected, and the second fixture is used as an inverter for OBC output alone. The first fixture is used as an inverter for DC output.

[0050] In addition, in this embodiment, the host computer can also perform a self-check on the relay K1 before the on-board charger aging test, and when the on-board charger output voltage is greater than 460V, it is confirmed that the relay K1 is in the disconnected state.

[0051] The embodiment of the present invention provides an energy recovery method for an on-board charger, wherein the on-board charger outputs direct current; if the voltage of the direct current is less than a preset first threshold, the voltage of the direct current is increased to a first value by a first tool, so that the direct current after the voltage is increased enters the alternating current grid; wherein the first value is greater than the voltage of the alternating current grid; if the voltage of the direct current is greater than a preset second threshold, the voltage of the direct current is reduced to a second value by a second tool, so that the direct current after the voltage is reduced enters the alternating current grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the alternating current grid. In this method, the on-board charger can be used for energy recovery, and the energy generated by the on-board charger during the aging test can be recovered, thereby achieving the purpose of energy saving.

[0052] Embodiment 2:

[0053] An embodiment of the present invention provides an energy recovery method for a vehicle charger. The method is implemented on the basis of the above embodiment, and focuses on describing the structure and working mode of the second tooling.

[0054] In some embodiments, the second tooling includes: a first power factor correction circuit, a first resonant circuit and a target circuit; wherein a second power factor correction circuit and a second resonant circuit are arranged in the target circuit.

[0055] See also Figure 3 A schematic diagram of the structure of a second tooling shown in FIG. Figure 4 Schematic diagram of a grid-connected mode PFC stage loop of a second tooling.

[0056] like Figure 3 As shown, PFC is the power factor correction circuit of the second fixture; LC is the resonant circuit of the second fixture; OBC is the general term for the power factor correction circuit + resonant circuit of the second fixture, that is, the target circuit. Vbulk is the bus voltage between the resonant circuit of the second fixture and the power factor correction circuit.

[0057] like Figure 3 and Figure 4As shown, the LC stage is used to stabilize the voltage on the HV side of the previous stage, the PFC is used to stabilize the bus voltage, and the grid-connected current depends on the OBC output power at the front end of the HV. The working sequence can be: OBC no-load start, running the voltage loop → LC extracts energy from the HV side, so that the HV side voltage is consistent with the set value → PFC extracts energy from the bus and connects to the grid, so that the bus voltage is maintained at 700V → OBC runs the current loop. In addition, if the HV voltage is lower than the set voltage of the second tooling, the drive of the LC stage is turned off by hiccups until the HV voltage is higher than the set value, and the LC re-enters the loop to work.

[0058] In summary, this embodiment provides the structure and working mode of the second tooling, which can be used to implement the energy recovery method of the above-mentioned on-board charger, utilize the on-board charger to perform energy recovery, and recover the energy generated by the on-board charger during the aging test, thereby achieving the purpose of saving energy.

[0059] Embodiment three:

[0060] An embodiment of the present invention provides an energy recovery method for a vehicle charger. The method is implemented on the basis of the above embodiment, and focuses on describing the structure and working mode of the first tooling.

[0061] In some embodiments, the loop control of the first tooling adopts a dual-loop competition method of a voltage loop and a current loop.

[0062] See also Figure 5 A schematic diagram of the structure of a first tooling is shown in FIG. Figure 5 As shown, DCDC is a DC circuit, LC is a resonant circuit, PFC is a power factor correction circuit, Duty, DLC, and DPFC are output duty cycles, PI is a PI control algorithm, Vbulk is a bus voltage feedback value, Vbulk* is a bus voltage reference value, Vhv is an HV voltage feedback value, Vhv* is an HV voltage reference value, LvCur is a LV current feedback value, LvCur* is a LV current reference value, and MIN is the smaller one.

[0063] like Figure 5 As shown, the DCDC control strategy of the first fixture is: DCDC needs to convert the energy of LV to the HV side, and the loop control adopts a dual-loop competition method of voltage loop and current loop. The first fixture requires DC to first establish the HV voltage to the target voltage. Since the error between the target voltage and the actual voltage will gradually become smaller, the voltage loop will eventually win, and the HV voltage will stabilize at the target voltage value. In addition, OBC will also control the HV voltage, so the HV side can be regarded as having a CV load. When the HV needs current, the LV current will continue to increase, and eventually the current loop will win, and it also plays a role in current limiting.

[0064] like Figure 5As shown, the OBC control strategy of the first fixture is changed to: To control the output current of the first fixture, the LC part of the first fixture needs to work in the current loop, so the CV load needs to be connected to clamp the output voltage of the LC. Therefore, the rear-stage LC of the first fixture needs to implement the function of the CV load to control the HVDC voltage to be constant. When the HV voltage is constant, in order to increase the output power of the first fixture, if the grid-connected power remains unchanged, the bus voltage will be too high. Therefore, the rear-stage inverter needs to increase the grid-connected output power to stabilize the bus voltage. Therefore, the inverter adopts the bus voltage outer loop + dq current inner loop.

[0065] In summary, this embodiment provides the structure and working mode of the first tooling, which can be used to implement the energy recovery method of the above-mentioned on-board charger, utilize the on-board charger to perform energy recovery, and recover the energy generated by the on-board charger during the aging test, thereby achieving the purpose of saving energy.

[0066] Embodiment 4:

[0067] Corresponding to the above method embodiment, the present invention provides an energy recovery device for a vehicle charger, see Figure 6 The schematic diagram of the structure of an energy recovery device of an on-board charger is shown, and the energy recovery device of the on-board charger includes:

[0068] The on-board charger output module 61 is used for the on-board charger to output direct current;

[0069] A first tool processing module 62 is used to increase the voltage of the DC power to a first value through a first tool if the voltage of the DC power is less than a preset first threshold value, so that the DC current with the increased voltage enters the AC power grid; wherein the first value is greater than the voltage of the AC power grid;

[0070] The second tooling processing module 63 is used to reduce the voltage of the DC power to a second value through the second tooling if the voltage of the DC power is greater than a preset second threshold value, so that the DC current with the reduced voltage enters the AC power grid; wherein the second threshold value is greater than or equal to the first threshold value, and the second value is greater than the voltage of the AC power grid.

[0071] The above-mentioned device also includes: a first tooling and a second tooling common processing module, which is used to determine the output power of the DC power output by the on-board charger; if the output power corresponds to the rated power of the second tooling, the DC power is divided into a first DC power and a second DC power; wherein the power of the first DC power is the rated power; the voltage of the first DC power is reduced to a second value by the second tooling, so that the first DC current after the voltage is reduced enters the AC power grid; the voltage of the second DC power is adjusted to the first value by the first tooling, so that the second DC current after the voltage is adjusted enters the AC power grid.

[0072] The first output end of the on-board charger, the first tooling and the AC power grid are connected in sequence; the second output end of the on-board charger, the second tooling and the AC power grid are connected in sequence.

[0073] The first tooling processing module is used to, if the voltage of the DC power is less than a preset first threshold, output DC power to the first tooling from the first output end of the on-board charger; and increase the voltage of the DC power to a first value through the first tooling.

[0074] The second tooling processing module is used to, if the voltage of the DC power is greater than a preset second threshold, cause the second output end of the on-board charger to output the DC power to the second tooling; and reduce the voltage of the DC power to a second value through the second tooling.

[0075] A first node is provided in the connection path between the second output end of the above-mentioned on-board charger and the second tooling, and the first node, the relay and the first tooling are connected in sequence; the step of dividing the DC power into the first DC power and the second DC power includes: dividing the DC power into the first DC power and the second DC power through the relay.

[0076] The loop control of the first tooling mentioned above adopts a dual-loop competition method of a voltage loop and a current loop.

[0077] The above-mentioned second tooling includes: a first power factor correction circuit, a first resonant circuit and a target circuit; wherein the target circuit is provided with a second power factor correction circuit and a second resonant circuit.

[0078] The embodiment of the present invention provides an energy recovery method, device and electronic device for an on-board charger, wherein the on-board charger outputs direct current; if the voltage of the direct current is less than a preset first threshold, the voltage of the direct current is increased to a first value by a first tool, so that the direct current after the voltage is increased enters the alternating current grid; wherein the first value is greater than the voltage of the alternating current grid; if the voltage of the direct current is greater than a preset second threshold, the voltage of the direct current is reduced to a second value by a second tool, so that the direct current after the voltage is reduced enters the alternating current grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the alternating current grid. In this manner, the on-board charger can be used for energy recovery, and the energy generated by the on-board charger during the aging test can be recovered, thereby achieving the purpose of energy saving.

[0079] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the energy recovery system of the on-board charger described above can refer to the corresponding process in the embodiment of the energy recovery method of the on-board charger mentioned above, and will not be repeated here.

[0080] Embodiment five:

[0081] The embodiment of the present invention also provides an electronic device for running the energy recovery method of the vehicle charger; see Figure 7 A structural schematic diagram of an electronic device is shown, the electronic device includes a memory 100 and a processor 101, wherein the memory 100 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the energy recovery method of the above-mentioned on-board charger.

[0082] Further, Figure 7 The electronic device shown further includes a bus 102 and a communication interface 103 , and the processor 101 , the communication interface 103 and the memory 100 are connected via the bus 102 .

[0083] The memory 100 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 7 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0084] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100 and completes the steps of the method of the above embodiment in combination with its hardware.

[0085] An embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the energy recovery method of the above-mentioned on-board charger. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0086] The energy recovery method, device and computer program product of the on-board charger provided in the embodiments of the present invention include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method in the previous method embodiment. The specific implementation can be referred to the method embodiment, which will not be repeated here.

[0087] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and / or device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0088] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0090] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0091] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes 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 invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. An energy recovery method for a vehicle charger, characterized in that: The method comprises: The on-board charger outputs DC power; If the voltage of the DC power is less than a preset first threshold, the voltage of the DC power is increased to a first value by a first tool, so that the DC current with increased voltage enters the AC power grid; wherein the first value is greater than the voltage of the AC power grid; If the voltage of the DC power is greater than a preset second threshold, the voltage of the DC power is reduced to a second value by a second tooling so that the DC current with reduced voltage enters the AC power grid; wherein the second threshold is greater than or equal to the first threshold, and the second value is greater than the voltage of the AC power grid.

2. The method according to claim 1, characterized in that After the step of ensuring that the voltage of the direct current is greater than a preset second threshold, the method further comprises: Determining the output power of the direct current output by the on-board charger; If the output power corresponds to the rated power of the second tooling, the direct current is divided into a first direct current and a second direct current; wherein the power of the first direct current is the rated power; reducing the voltage of the first direct current to the second value by the second tool, so that the first direct current after the voltage is reduced enters the alternating current grid; The voltage of the second direct current is adjusted to the first value by the first tool, so that the second direct current with adjusted voltage enters the alternating current power grid.

3. The method according to claim 2, characterized in that The first output end of the on-board charger, the first tooling and the AC power grid are connected in sequence; the second output end of the on-board charger, the second tooling and the AC power grid are connected in sequence.

4. The method according to claim 3, characterized in that If the voltage of the direct current is less than a preset first threshold, the step of increasing the voltage of the direct current to a first value by a first tool comprises: If the voltage of the direct current is less than a preset first threshold, the first output terminal of the on-board charger outputs the direct current to the first tooling; The voltage of the direct current is increased to a first value by the first tool.

5. The method according to claim 3, characterized in that: If the voltage of the direct current is greater than a preset second threshold, the step of reducing the voltage of the direct current to a second value by a second tool comprises: If the voltage of the direct current is greater than a preset second threshold, the second output terminal of the on-board charger outputs the direct current to the second tooling; The voltage of the direct current is reduced to a second value by the second tool.

6. The method according to claim 3, characterized in that A first node is provided in a connection path between the second output end of the on-board charger and the second tooling, and the first node, the relay and the first tooling are connected in sequence; The step of dividing the direct current into a first direct current and a second direct current includes: dividing the direct current into the first direct current and the second direct current by the relay.

7. The method according to any one of claims 1 to 6, characterized in that: The loop control of the first tooling adopts a dual-loop competition method of a voltage loop and a current loop.

8. The method according to any one of claims 1 to 6, characterized in that: The second tooling includes: a first power factor correction circuit, a first resonant circuit and a target circuit; wherein the target circuit is provided with a second power factor correction circuit and a second resonant circuit.

9. An energy recovery device for a vehicle charger, characterized in that: The device comprises: On-board charger output module, used for on-board charger to output DC power; A first tool processing module is used to increase the voltage of the direct current to a first value through a first tool if the voltage of the direct current is less than a preset first threshold value, so that the direct current with the increased voltage enters the alternating current grid; wherein the first value is greater than the voltage of the alternating current grid; The second tooling processing module is used to reduce the voltage of the DC power to a second value through a second tooling if the voltage of the DC power is greater than a preset second threshold value, so that the DC current with reduced voltage enters the AC power grid; wherein the second threshold value is greater than or equal to the first threshold value, and the second value is greater than the voltage of the AC power grid.

10. An electronic device, characterized in that: The electronic device includes a processor and a memory, the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the energy recovery method of the on-board charger according to any one of claims 1 to 8.

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