Charging and discharging circuit and vehicle

Abstract

The present disclosure relates to a charging and discharging circuit and a vehicle. The charging and discharging circuit includes a controller, a charging and discharging interface connected to the controller, a charging interface, a battery module, a charging and discharging module and a target motor electronic control component. One end of the charging and discharging module is connected to the charging and discharging interface, and the other end is connected to the battery module. One end of the target motor electronic control component is connected to the battery module, and the other end is connected to the charging interface. The controller is used to control the charging path or discharging path formed by the charging and discharging module, the battery module and the target device according to the charging and discharging request; and is also used to control the target motor electronic control component, the battery module and the charging device to form a charging path according to the charging request. In this way, the problem of incompatibility between the target device and the battery module can be effectively avoided; the charging efficiency of the vehicle can also be effectively improved, which is conducive to improving the user experience and satisfaction.

Description

Technical Field

[0001] The present disclosure relates to the field of new energy vehicles, and in particular, to a charging and discharging circuit and a vehicle. Background Art

[0002] As the world pays more attention to environmental sustainability and accelerates energy transformation, electric vehicles have become the core force driving the green revolution in the transportation sector. With the rapid growth of the electric vehicle market, the issue of electric vehicle charging has received continuous attention.

[0003] At present, there are still problems in the charging of electric vehicles, such as low charging efficiency and the inability to charge the vehicle due to the mismatch between the charging facilities and the charging parameters required by the vehicle. Summary of the invention

[0004] An object of the present disclosure is to provide a charging and discharging circuit and a vehicle.

[0005] In order to achieve the above-mentioned purpose, according to a first aspect of an embodiment of the present disclosure, a charge and discharge circuit is provided, the charge and discharge circuit comprising a controller, and a charge and discharge interface connected to the controller, a charging interface, a battery module, a charge and discharge module and a target motor electronic control component, one end of the charge and discharge module is connected to the charge and discharge interface, and the other end is connected to the battery module, one end of the target motor electronic control component is connected to the battery module, and the other end is connected to the charging interface, the charge and discharge interface is used to connect to a target device, and the charging interface is used to connect to a charging device;

[0006] The controller is used to control a charging path or a discharging path formed by the charging and discharging module, the battery module and the target device according to a charging and discharging request;

[0007] The controller is further used to control the target motor electronic control component to form a charging path with the battery module and the charging device according to a charging request.

[0008] Optionally, the target motor electronic control component includes one or more target bridge arm conversion circuits, each of the target bridge arm conversion circuits includes a target bridge arm and a target winding;

[0009] For each target bridge arm conversion circuit, the first end of the target winding is connected to the midpoint of the target bridge arm, the second end of the target winding is connected to the charging interface, and the bus end of the target bridge arm is connected to the battery module.

[0010] Optionally, the controller is used to determine at least one designated bridge arm conversion circuit from the one or more target bridge arm conversion circuits according to the charging request, and form a charging path with the battery module and the charging device through the designated bridge arm conversion circuit.

[0011] Optionally, the controller is used to control the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned on within the first predetermined time period of each control cycle when the charging request is a boost charging request, so as to form a first boost charging path between the charging device and the target winding in the designated bridge arm conversion circuit, and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit, so that the charging device can charge the target winding in the designated bridge arm conversion circuit.

[0012] Optionally, the controller is also used to control the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned on and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned off within the second predetermined time period of each control cycle, so as to form a second boost charging path between the charging device and the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit, the target winding in the designated bridge arm conversion circuit, and the battery module, so that the charging device and the target winding in the designated bridge arm conversion circuit can charge the battery module.

[0013] Optionally, the charging and discharging module includes a first motor electronic control component, a second motor electronic control component and a first switch,

[0014] The first motor electronic control component includes one or more first bridge arm conversion circuits, each of which includes a first bridge arm and a first winding, and the second motor electronic control component includes one or more second bridge arm conversion circuits, each of which includes a second bridge arm and a second winding;

[0015] For each first bridge arm conversion circuit, the first end of the first winding is connected to the midpoint of the first bridge arm, the second end of the first winding is connected to the first end of the first switch, and the bus terminal of the first bridge arm is connected to the charge and discharge interface;

[0016] For each second bridge arm conversion circuit, the first end of the second winding is connected to the midpoint of the second bridge arm, the second end of the second winding is connected to the second end of the first switch, and the bus end of the second bridge arm is connected to the battery module.

[0017] Optionally, the controller is used to determine at least one first target bridge arm conversion circuit from the one or more first bridge arm conversion circuits and at least one second target bridge arm conversion circuit from the one or more second bridge arm conversion circuits according to the charge and discharge request, control the first switch to close, and form a charging path or a discharging path through the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, and the first switch, the battery module and the target device.

[0018] Optionally, the controller is used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on during the first standby time period of each control cycle when the charge and discharge request is a boost charging request, so as to form a third boost charging path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so as to charge the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit.

[0019] Optionally, the controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, so as to form a fourth boost charging path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit and the battery module, so that the target device, the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit charge the battery module.

[0020] Optionally, the controller is used to control the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within a first set time period of each control cycle when the charge and discharge request is a boost discharge request, so as to form a first boost discharge path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the battery module discharges the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit.

[0021] Optionally, the controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off within a second set time period of each control cycle, so as to form a second boost discharge path between the battery module and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit and the target device, so that the battery module, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit discharge the target device.

[0022] Optionally, the controller is used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first specified time period of each control cycle when the charge and discharge request is a step-down charging request, so as to form a first step-down charging path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module, so that the target device charges the battery module.

[0023] Optionally, the controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be cut off, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be cut off within the second specified time period of each control cycle, so as to form a second step-down charging path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit charge the battery module.

[0024] Optionally, the controller is used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within a first preset time period of each control cycle when the charge and discharge request is a step-down discharge request, so as to form a first step-down discharge path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module, so that the battery module discharges the target device, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit.

[0025] Optionally, the controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within a second preset time period of each control cycle, so as to form a second step-down discharge path between the target device and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit discharge the target device.

[0026] Optionally, the charge and discharge circuit further includes a second switch, one end of the second switch is connected to the charge and discharge interface, and the other end of the second switch is connected to the battery module.

[0027] The controller is used to control the second switch to be disconnected, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first duration period of each control cycle when the current temperature of the battery module is less than or equal to a preset temperature threshold, so as to form a first self-heating path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so as to heat the battery module.

[0028] Optionally, the controller is also used to control the second switch to close during the second duration period of each control cycle, and control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, so as to form a second self-heating path between the battery module and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit through the second switch to heat the battery module.

[0029] According to a second aspect of an embodiment of the present disclosure, a vehicle is provided, comprising: the charging and discharging circuit described in the first aspect.

[0030] The above technical solution, through the charge and discharge interface, controls the charge and discharge module to form a charging path or a discharging path with the battery module and the target device according to the charge and discharge request. It can form a charging path or a discharging path compatible with the battery module according to different charge and discharge requests, and can effectively avoid the problem of incompatibility between the target device and the battery module. It can also control the target motor electronic control component to form a charging path with the battery module and the target device to form a charging path with the charge and discharge module according to the charging request and the charge and discharge request, thereby effectively improving the flexibility and reliability of vehicle charging and discharging, and effectively improving the charging efficiency of the vehicle, which is beneficial to improving user experience and satisfaction.

[0031] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0033] Figure 1 is a schematic diagram of a charging and discharging circuit shown in the first embodiment of the present disclosure;

[0034] Figure 2 is a circuit diagram of a charging and discharging circuit shown in the second embodiment of the present disclosure;

[0035] Figure 3 is a circuit diagram of a charging and discharging circuit shown in the third embodiment of the present disclosure;

[0036] Figure 4 is a circuit diagram of a charging and discharging circuit shown in a fourth embodiment of the present disclosure;

[0037] Figure 5 is a circuit diagram of a charging and discharging circuit shown in the fifth embodiment of the present disclosure;

[0038] Figure 6 is a circuit diagram of a charging and discharging circuit shown in a sixth embodiment of the present disclosure;

[0039] Figure 7 is a circuit diagram of a charging and discharging circuit shown in the seventh embodiment of the present disclosure;

[0040] Figure 8 is a circuit diagram of a charging and discharging circuit shown in the eighth embodiment of the present disclosure;

[0041] Fig. 9 is a circuit diagram of a charging and discharging circuit shown in the ninth embodiment of the present disclosure;

[0042] Fig.10 is a circuit diagram of a charging and discharging circuit shown in the tenth embodiment of the present disclosure;

[0043] Fig.11 is a circuit diagram of a charging and discharging circuit shown in the eleventh embodiment of the present disclosure;

[0044] Fig.12 is a circuit diagram of a charging and discharging circuit shown in the twelfth embodiment of the present disclosure;

[0045] Fig.13 is a circuit diagram of a charging and discharging circuit shown in the thirteenth embodiment of the present disclosure;

[0046] Fig.14 is a block diagram of a vehicle according to an exemplary embodiment. DETAILED DESCRIPTION

[0047] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0048] Before the specific embodiments of the present disclosure are described in detail, the application scenarios of the present disclosure are first described as follows. The present disclosure can be applied to scenarios where power batteries of different types of electric vehicles are charged by charging piles, scenarios where power batteries of electric vehicles are discharged to other electric vehicles, and scenarios where two charging devices charge vehicles at the same time. At present, most charging facilities are charging piles with a fixed voltage output range. However, the charging parameters (such as charging voltage, charging current, power, etc.) of power batteries of different types of electric vehicles are different. When charging power batteries of different types of electric vehicles by charging piles with a fixed voltage output range, there may be problems such as the voltage of the charging facility not matching the voltage of the power battery and the problem of low charging efficiency. When the charging voltage of the power battery of the electric vehicle is not compatible with the fixed output voltage of the charging pile, the charging pile cannot directly charge the power battery of the electric vehicle. At this time, a charging conversion device is usually required to connect the charging pile and the electric vehicle, convert the output voltage of the charging pile into a charging voltage suitable for the electric vehicle, and ensure a safe and efficient charging process. However, the charging conversion device has the problem of being large in size and heavy in weight, which is not convenient to carry; in the process of voltage conversion, the charging conversion device will also produce a certain amount of energy loss, so that part of the electrical energy is converted into heat energy and lost, reducing the overall charging efficiency; and the cost of a high-performance charging conversion device may be relatively high. In addition, when faced with some emergencies, such as the electric vehicle running out of power before reaching a fixed charging pile; or in remote areas, the distribution of charging stations is not dense enough, and it is difficult for drivers to find charging stations. The cost of using rescue towing services is relatively high and it takes time to wait for rescue. In the face of these emergencies, the reliability and flexibility of vehicle charging are low, resulting in a poor user experience.

[0049] In order to solve the above technical problems, the present disclosure provides a charging and discharging circuit and a vehicle, wherein the charging and discharging circuit includes a controller, and a charging and discharging interface connected to the controller, a charging interface, a battery module, a charging and discharging module and a target motor electronic control component, wherein one end of the charging and discharging module is connected to the charging and discharging interface, and the other end is connected to the battery module, one end of the target motor electronic control component is connected to the battery module, and the other end is connected to the charging interface, the charging and discharging interface is used to connect to a target device, and the charging interface is used to connect to a charging device; the controller is used to control the charging path or discharging path formed by the charging and discharging module, the battery module and the target device according to a charging and discharging request; the controller is also used to control the target motor electronic control component, the battery module and the charging device to form a charging path according to a charging request. In this way, through the charge and discharge interface, and according to the charge and discharge request, the charge and discharge module is controlled to form a charging path or a discharging path with the battery module and the target device. According to different charge and discharge requests, a charging path or a discharging path compatible with the battery module can be formed, which can effectively avoid the problem of incompatibility between the target device and the battery module. It is also possible to simultaneously control the target motor electronic control component and the battery module to form a charging path, and the target device and the charge and discharge module to form a charging path according to the charging request and the charge and discharge request, thereby effectively improving the flexibility and reliability of vehicle charging and discharging, and effectively improving the charging efficiency of the vehicle, which is beneficial to improving user experience and satisfaction.

[0050] Figure 1 is a schematic diagram of a charging and discharging circuit shown in the first embodiment of the present disclosure, such as Figure 1 As shown, the charge and discharge circuit 100 includes: a controller 101, and a charge and discharge module 102 connected to the controller 101, a target motor electronic control component 103, a battery module 104, a charge and discharge interface 105 and a charging interface 106, one end of the charge and discharge module 102 is connected to the charge and discharge interface 105, and the other end is connected to the battery module 104, one end of the target motor electronic control component 103 is connected to the battery module 104, and the other end is connected to the charging interface 106, the charge and discharge interface 105 is used to connect to a target device 107, and the charging interface 106 is used to connect to a charging device 108;

[0051] The controller 101 is used to control the charging path or the discharging path formed by the charging and discharging module 102, the battery module 104 and the target device 107 according to the charging and discharging request;

[0052] The controller 101 is further used to control the target motor electronic control component 103 to form a charging path with the battery module 104 and the charging device 108 according to a charging request.

[0053] Wherein, the target device 107 may be a charging pile or other charging device with a charging function, or a vehicle that needs to be charged. The charging device 108 may be a charging pile or other charging device with a charging function. In the case where the target device 107 is a charging pile or other charging device with a charging function, the controller 101 sends the charging and discharging request to the target device 107, and the charging and discharging request includes a charging instruction and a charging parameter; in the case where the target device 107 is a vehicle that needs to be charged, the target device 107 sends the charging and discharging request to the controller 101, and the charging and discharging request includes a discharging instruction and a discharging parameter. The charging parameter may be one or more of a charging voltage, a charging current and a charging power, and the discharging parameter may be one or more of a discharging voltage, a discharging current and a discharging power. In the case where the charging device 108 is a charging pile or other charging device with a charging function, the controller 101 sends the charging request to the charging device 108, and the charging request may include a charging instruction and a charging parameter, and the charging parameter may be one or more of a charging voltage, a charging current and a charging power. In the case of receiving a charging instruction, the charge and discharge request is determined according to the charging parameters of the battery module 104 and the output voltage, output current and output power of the target device 107. In the case of receiving a discharging instruction, the charge and discharge request is determined according to the discharge parameters of the battery module 104 and the input voltage, input current and input power of the target device 107. In the case of receiving a charging instruction, the charging request is determined according to the charging parameters of the battery module 104 and the output voltage, output current and output power of the charging device 108.

[0054] For example, when a charging instruction is received, if it is determined that the output voltage of the charging device 108 is less than the charging voltage of the battery module 104, the charging request is determined to be a boost charging request. When a charging instruction is received, if it is determined that the output voltage of the target device 107 is greater than the charging voltage of the battery module 104, the charging and discharging request is determined to be a step-down charging request; if it is determined that the output voltage of the target device 107 is less than the charging voltage of the battery module 104, the charging and discharging request is determined to be a boost charging request. When a discharge instruction of the target device 107 is received, if it is determined that the input voltage of the target device 107 is greater than the discharge voltage of the battery module 104, the charging and discharging request is determined to be a step-down discharge request; if it is determined that the input voltage of the target device 107 is less than the discharge voltage of the battery module 104, the charging and discharging request is determined to be a step-down discharge request.

[0055] In the case where it is determined that the charging request is a boost charging request, the target motor electronic control component 103 is controlled to form a boost charging path with the battery module 104 and the charging device 108, and the battery module 104 is boosted and charged through the charging interface 106. In the case where it is determined that the charging and discharging request is a step-down charging request, the charging and discharging module 102 is controlled to form a step-down charging path with the battery module 104 and the target device 107, and the battery module 104 is step-down charged through the charging and discharging interface 105. In the case where it is determined that the charging and discharging request is a boost charging request, the charging and discharging module 102 is controlled to form a boost charging path with the battery module 104 and the target device 107, and the battery module 104 is boosted and charged through the charging and discharging interface 105. In the case where it is determined that the charging and discharging request is a boost discharge request, the charging and discharging module 102 is controlled to form a boost discharge path with the battery module 104 and the target device 107, and the target device 107 is boosted and discharged through the charging and discharging interface 105. When it is determined that the charge and discharge request is a step-down discharge request, the charge and discharge module 102 is controlled to form a step-down discharge path with the battery module 104 and the target device 107 , and the target device 107 is step-down discharged through the charge and discharge interface 105 .

[0056] The above technical scheme, through the charging and discharging interface, controls the charging and discharging module to form a charging path or a discharging path with the battery module and the target device according to the charging and discharging request. It can form a charging path or a discharging path compatible with the battery module according to different charging and discharging requests of the target device, and can effectively avoid the problem of incompatibility between the target device and the battery module. It can also control the target motor electronic control component to form a charging path with the battery module according to the charging request and the charging and discharging request, and the target device to form a charging and discharging path with the charging and discharging module, thereby effectively improving the flexibility and reliability of vehicle charging and discharging, and effectively improving the charging efficiency of the vehicle, which is beneficial to improving user experience and satisfaction.

[0057] Figure 2 is a circuit diagram of a charging and discharging circuit shown in the second embodiment of the present disclosure, such as Figure 2 As shown, the target motor electronic control component 103 includes one or more target bridge arm conversion circuits, each of which includes a target bridge arm C1 and a target winding C2;

[0058] For each target bridge arm conversion circuit, the first end of the target winding C2 is connected to the midpoint of the target bridge arm C1 , the second end of the target winding C2 is connected to the charging interface 106 , and the bus end of the target bridge arm C1 is connected to the battery module 104 .

[0059] Wherein, the target motor electronic control component 103 can be a single-phase motor, a three-phase motor, or other types of motors. When the target motor electronic control component 103 is a single-phase motor, the target motor electronic control component 103 includes one target bridge arm conversion circuit. When the target motor electronic control component 103 is a three-phase motor, the target motor electronic control component 103 includes three target bridge arm conversion circuits.

[0060] The above technical solution forms a charging path between the target motor electronic control component, the battery module and the charging device through the target bridge arm conversion circuit of the target motor electronic control component, thereby providing a path basis for the subsequent boost charging of the battery module.

[0061] Optionally, the controller 101 is used to determine at least one designated bridge arm conversion circuit from the one or more target bridge arm conversion circuits according to a charging request of the charging device 108, and form a charging path with the battery module 104 and the charging device 108 through the designated bridge arm conversion circuit.

[0062] Wherein, when the target motor electronic control component 103 is a single-phase motor, the target bridge arm conversion circuit in the single-phase motor is directly used as the designated bridge arm conversion circuit. When the target motor electronic control component 103 is a three-phase motor, one of the target bridge arm conversion circuits can be used as the designated bridge arm conversion circuit; two of the target bridge arm conversion circuits can be used as the designated bridge arm conversion circuit; or all three target bridge arm conversion circuits can be used as the designated bridge arm conversion circuit.

[0063] The above technical solution, by determining the designated bridge arm conversion circuit from one or more target bridge arm conversion circuits, can form a charging path through the designated bridge arm conversion circuit, the battery module and the charging device, which can effectively improve the charging efficiency of the vehicle, thereby helping to improve the user experience and satisfaction.

[0064] Alternatively, if Figure 2 As shown, the controller 101 is used to control the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned on within the first predetermined time period of each control cycle when the charging request is a boost charging request, so as to form a first boost charging path between the charging device 108 and the target winding in the designated bridge arm conversion circuit, and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit, so that the charging device 108 charges the target winding in the designated bridge arm conversion circuit.

[0065] Among them, the charging device 108 can be a charging pile or other charging device with a charging function. In the case of receiving a charging instruction from the charging device 108, if it is determined that the output voltage of the target device 107 is less than the charging voltage of the battery module 104, it is determined that the charging request is a boost charging request. At this time, the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit is turned on. The current output by the positive electrode of the charging device 108 passes through the charging interface 106, the target winding of the designated bridge arm conversion circuit, the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit, and returns to the negative terminal of the charging device 108 in sequence.

[0066] It should be noted that when determining one or less designated bridge arm conversion circuits from one or more target bridge arm change circuits, the designated bridge arm conversion circuit is cyclically selected and determined from one or more target bridge arm change circuits in each control cycle. For example, when the target motor electronic control component 103 is a three-phase motor, the three-phase motor includes three target bridge arm conversion circuits U, W, and V. When determining a designated bridge arm conversion circuit from one or more target bridge arm change circuits, in the first control cycle, U can be selected as the designated bridge arm conversion circuit, in the second control cycle, W can be selected as the designated bridge arm conversion circuit, in the third control cycle, V can be selected as the designated bridge arm conversion circuit, and in the fourth control cycle, U can be selected as the designated bridge arm conversion circuit, and the designated bridge arm conversion circuit is determined cyclically in sequence. When determining the designated bridge arm conversion circuits less than the number of the target bridge arm change circuits from one or more target bridge arm change circuits, in the first control cycle, U and W can be selected as the designated bridge arm conversion circuits, in the second control cycle, W and V can be selected as the designated bridge arm conversion circuits, in the third control cycle, V and U can be selected as the designated bridge arm conversion circuits, and in the fourth control cycle, U and W can be selected as the designated bridge arm conversion circuits, and the designated bridge arm conversion circuits are determined in turn in a cycle. By alternately determining the designated bridge arm conversion circuits from one or more target bridge arm change circuits, it is possible to avoid overheating of a single target bridge arm, improve the overall heat dissipation efficiency, and extend the service life of the target bridge arm conversion circuits. In the figure, the target motor electronic control component 103 is an example of a three-phase motor, and the designated bridge arm conversion circuits are three target bridge arm conversion circuits.

[0067] The above technical scheme forms a boost charging path through the charging device, the designated bridge arm conversion circuit and the battery module, so that the charging device can boost and charge the battery module. When the output voltage of the charging device is lower than the charging voltage of the battery module, the battery module can be boosted and charged. The designated bridge arm conversion circuit is charged first, which provides a basis for the subsequent boost charging of the battery module through the charging device and the designated bridge arm conversion circuit.

[0068] Figure 3 is a circuit diagram of a charging and discharging circuit shown in the third embodiment of the present disclosure, such as Figure 3 As shown, the controller 101 is also used to control the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned on and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned off within the second predetermined time period of each control cycle, so as to form a second boost charging path between the charging device 108 and the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit, the target winding in the designated bridge arm conversion circuit, and the battery module 104, so that the charging device 108 and the target winding in the designated bridge arm conversion circuit charge the battery module 104.

[0069] Wherein, the charging device 108 may be a charging pile or other charging device with a charging function. In the case of receiving a charging instruction, if it is determined that the output voltage of the charging device 108 is less than the charging voltage of the battery module 104, the charging request is determined to be a boost charging request. At this time, the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit is turned on, and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit is turned off. In the first predetermined time period, the charging device 108 charges the target winding in the designated bridge arm conversion circuit, and in the second predetermined time period, the charging device 108 and the target winding in the designated bridge arm conversion circuit charge the battery module 104. In the second predetermined time period, the current output from the positive electrode of the charging device 108 passes through the charging interface 106, the target winding of the designated bridge arm conversion circuit, the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit, the positive electrode of the battery module, the negative electrode of the battery module 104, and returns to the negative end of the charging device 108 in sequence.

[0070] The above technical scheme forms a second boost charging path through the charging device, the designated bridge arm conversion circuit and the battery module, so that the charging device and the designated bridge arm conversion circuit can boost and charge the battery module. When the output voltage of the charging device is lower than the charging voltage of the battery module, the battery module can be boosted and charged through the charging device and the designated bridge arm conversion circuit, thereby avoiding the problem of prolonged charging time and low efficiency caused by the output voltage of the target device being lower than the charging voltage of the battery module, thereby effectively improving the charging efficiency and reducing the charging time, which is beneficial to improving the user experience and satisfaction.

[0071] Figure 4 is a circuit diagram of a charging and discharging circuit shown in the fourth embodiment of the present disclosure, such as Figure 4 As shown, the charging and discharging module 102 includes a first motor electronic control component 1021, a second motor electronic control component 1022 and a first switch 109.

[0072] The first motor electronic control component 1021 includes one or more first bridge arm conversion circuits, each of which includes a first bridge arm A1 and a first winding A2; the second motor electronic control component 1022 includes one or more second bridge arm conversion circuits, each of which includes a second bridge arm B1 and a second winding B2;

[0073] For each first bridge arm conversion circuit, the first end of the first winding is connected to the midpoint of the first bridge arm, the second end of the first winding is connected to the first end of the first switch 109, and the bus end of the first bridge arm is connected to the charge and discharge interface 105;

[0074] For each second bridge arm conversion circuit, the first end of the second winding is connected to the midpoint of the second bridge arm, the second end of the second winding is connected to the second end of the first switch 109 , and the bus end of the second bridge arm is connected to the battery module 104 .

[0075] Wherein, the first motor electronic control component 1021 can be a single-phase motor, a three-phase motor, or other types of motors. When the first motor electronic control component 1021 is a single-phase motor, the first motor electronic control component 1021 includes one first bridge arm conversion circuit. When the first motor electronic control component 1021 is a three-phase motor, the first motor electronic control component 1021 includes three first bridge arm conversion circuits; the second motor electronic control component 1022 can be a single-phase motor, a three-phase motor, or other types of motors. When the second motor electronic control component 1022 is a single-phase motor, the second motor electronic control component 1022 includes one second bridge arm conversion circuit. When the second motor electronic control component 1022 is a three-phase motor, the second motor electronic control component 1022 includes three second bridge arm conversion circuits. In the figure, the first motor electronic control component 1021 and the second motor electronic control component 1022 are three-phase motors for example, and the first bridge arm conversion circuit is three first bridge arm conversion circuits, and the second bridge arm target conversion circuit is three second bridge arm conversion circuits.

[0076] The above technical scheme forms a charging and discharging path between the first motor electronic control component and the second motor electronic control component and the battery module and the target device through the first bridge arm conversion circuit of the first motor electronic control component and the second bridge arm conversion circuit of the second motor electronic control component, thereby providing a path basis for the subsequent charging or discharging of the battery module.

[0077] Optionally, the controller 101 is used to determine at least one first target bridge arm conversion circuit from the one or more first bridge arm conversion circuits and at least one second target bridge arm conversion circuit from the one or more second bridge arm conversion circuits according to the charge and discharge request, control the first switch to close, and form a charging path or a discharging path through the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, as well as the first switch, the battery module 104 and the target device 107.

[0078] Wherein, when the first motor electronic control component 1021 is a single-phase motor, the first bridge arm conversion circuit in the single-phase motor is directly used as the first target bridge arm conversion circuit. When the first motor electronic control component 1021 is a three-phase motor, one of the first bridge arm conversion circuits can be used as the first target bridge arm conversion circuit; two of the first bridge arm conversion circuits can be used as the first target bridge arm conversion circuit; or all three first bridge arm conversion circuits can be used as the first target bridge arm conversion circuit. When the second motor electronic control component 1022 is a single-phase motor, the second bridge arm conversion circuit in the single-phase motor can be used as the second target bridge arm conversion circuit. When the second motor electronic control component 1022 is a three-phase motor, one of the second bridge arm conversion circuits can be used as the second target bridge arm conversion circuit; two of the second bridge arm conversion circuits can be used as the second target bridge arm conversion circuit; or all three second bridge arm conversion circuits can be used as the second target bridge arm conversion circuit.

[0079] The above technical scheme, by determining the first target bridge arm conversion circuit from one or more first bridge arm conversion circuits, and determining the second target bridge arm conversion circuit from one or more second bridge arm conversion circuits, can form various forms of charging paths or discharging paths with the battery module and the target device through the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, thereby improving the flexibility and reliability of vehicle charging and discharging.

[0080] Optionally, Figure 4 For example, the controller 101 is used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on during the first standby time period of each control cycle when the charge and discharge request is a boost charging request, so as to form a third boost charging path between the target device 107 and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so as to charge the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit.

[0081] Wherein, the target device 107 can be a charging pile or other charging device with a charging function. In the case of receiving a charging instruction, if it is determined that the output voltage of the target device 107 is less than the charging voltage of the battery module 104, it is determined that the charge and discharge request is a boost charging request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. The current output by the positive electrode of the target device 107 passes through the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the first switch 109, the second winding in the second target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and returns to the negative terminal of the target device 107.

[0082] It should be noted that when determining one or less first target bridge arm conversion circuits from one or more first bridge arm change circuits, in each control cycle, the first target bridge arm conversion circuit is cyclically selected and determined from one or more first bridge arm change circuits. For example, when the first motor electronic control component 1021 is a three-phase motor, the three-phase motor includes three first bridge arm conversion circuits U, W, and V. When determining a first target bridge arm conversion circuit from one or more first bridge arm change circuits, in the first control cycle, U can be selected as the first target bridge arm conversion circuit, in the second control cycle, W can be selected as the first target bridge arm conversion circuit, in the third control cycle, V can be selected as the first target bridge arm conversion circuit, and in the fourth control cycle, U can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is cyclically determined in sequence. When determining the first target bridge arm conversion circuit less than the number of the first bridge arm change circuits from one or more first bridge arm change circuits, in the first control cycle, U and W can be selected as the first target bridge arm conversion circuit, in the second control cycle, W and V can be selected as the first target bridge arm conversion circuit, in the third control cycle, V and U can be selected as the first target bridge arm conversion circuit, in the fourth control cycle, U and W can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is determined in turn in a cycle. The method for determining the second target bridge arm conversion circuit is similar to the method for determining the first target bridge arm conversion circuit described above, and will not be repeated here. By alternately determining the first target bridge arm conversion circuit from one or more first bridge arm change circuits, or alternately determining the second target bridge arm conversion circuit from one or more second bridge arm change circuits, it is possible to avoid overheating of a single bridge arm, improve the overall heat dissipation efficiency, and extend the service life of the first bridge arm conversion circuit and the second bridge arm conversion circuit.

[0083] The above technical scheme forms a first boost charging path through the target device and the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, so that the target device can charge the first target bridge arm conversion circuit and the second target bridge arm conversion circuit. When the output voltage of the target device is lower than the charging voltage of the battery module, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit can be charged first, thereby providing a basis for the subsequent boost charging of the battery module through the target device, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit.

[0084] Figure 5 is a circuit diagram of a charging and discharging circuit shown in the fifth embodiment of the present disclosure, such as Figure 5 As shown, the controller 101 is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, so as to form a fourth boost charging path between the target device 107 and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit and the battery module 104, so that the target device 107, the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit charge the battery module 104.

[0085] Wherein, the target device 107 can be a charging pile or other charging device with charging function. In the case of receiving a charging instruction, if it is determined that the output voltage of the target device 107 is less than the charging voltage of the battery module 104, it is determined that the charge and discharge request is a boost charging request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned off. In the first standby time period, the target device 107 charges the first winding in the first target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module 104. In the second standby time period, the target device 107, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit charge the battery module 104. During the second standby time period, the current output by the positive electrode of the target device 107 passes through the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the first switch 109, the second winding in the second target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the positive electrode of the battery module 104, the negative electrode of the battery module 104, and returns to the negative end of the target device 107.

[0086] The above technical scheme forms a fourth boost charging path through the target device, the first target bridge arm conversion circuit, the second target bridge arm conversion circuit and the battery module, so that the target device, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit can boost and charge the battery module. When the output voltage of the target device is lower than the charging voltage of the battery module, the battery module can be boosted and charged through the target device, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, which can avoid the problem of prolonged charging time and low efficiency caused by the output voltage of the target device being lower than the charging voltage of the battery module, thereby effectively improving the charging efficiency and reducing the charging time, which is beneficial to improving the user experience and satisfaction.

[0087] Figure 6 is a circuit diagram of a charging and discharging circuit shown in the sixth embodiment of the present disclosure, such as Figure 6As shown, the controller 101 is used to control the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first set time period of each control cycle when the charge and discharge request is a boost discharge request, so as to form a first boost discharge path between the battery module 104 and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the battery module 104 discharges the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit.

[0088] The target device 107 may be a vehicle that needs to be charged. When a discharge instruction is received, if it is determined that the input voltage of the target device 107 is greater than the discharge voltage of the battery module 104, the charge and discharge request is determined to be a boost discharge request. At this time, the first switch 109 is closed, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. The current output from the positive electrode of the battery module 104 passes through the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, the first switch 109, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, and returns to the negative terminal of the battery module 104.

[0089] It should be noted that when determining one or less first target bridge arm conversion circuits from one or more first bridge arm change circuits, in each control cycle, the first target bridge arm conversion circuit is cyclically selected and determined from one or more first bridge arm change circuits. For example, when the first motor electronic control component is a three-phase motor, the three-phase motor includes three first bridge arm conversion circuits U, W, and V. When determining a first target bridge arm conversion circuit from one or more first bridge arm change circuits, in the first control cycle, U can be selected as the first target bridge arm conversion circuit, in the second control cycle, W can be selected as the first target bridge arm conversion circuit, in the third control cycle, V can be selected as the first target bridge arm conversion circuit, and in the fourth control cycle, U can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is cyclically determined in sequence. When determining the first target bridge arm conversion circuit less than the number of the first bridge arm conversion circuits from one or more first bridge arm conversion circuits, in the first control cycle, U and W can be selected as the first target bridge arm conversion circuit, in the second control cycle, W and V can be selected as the first target bridge arm conversion circuit, in the third control cycle, V and U can be selected as the first target bridge arm conversion circuit, in the fourth control cycle, U and W can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is determined in turn in a cycle. The method for determining the second target bridge arm conversion circuit is similar to the method for determining the first target bridge arm conversion circuit, and will not be repeated here.

[0090] The above technical scheme forms a first boost discharge path through the battery module and the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, so that the battery module can charge the first target bridge arm conversion circuit and the second target bridge arm conversion circuit. When the input voltage of the target device is greater than the discharge voltage of the battery module, the battery module can first charge the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, thereby providing a basis for the subsequent boost discharge of the target device through the battery module, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit.

[0091] Figure 7 is a circuit diagram of a charging and discharging circuit shown in the seventh embodiment of the present disclosure, such as Figure 7As shown, the controller 101 is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off within the second set time period of each control cycle, so as to form a second boost discharge path between the battery module 104 and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit and the target device 107, so that the battery module 104, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit discharge the target device 107.

[0092] Wherein, the target device 107 may be a vehicle that needs to be charged. In the case of receiving a discharge instruction, if it is determined that the input voltage of the target device 107 is greater than the discharge voltage of the battery module 104, it is determined that the charge and discharge request is a boost discharge request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned off. In the first set time period, the battery module 104 discharges the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit. In the second set time period, the battery module 104, the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit perform boost discharge on the target device 107. The current output from the positive electrode of the battery module 104 passes through the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, the first switch 109, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the negative electrode of the target device 107, the positive electrode of the target device 107, and returns to the negative end of the battery module 104.

[0093] The above technical scheme forms a second boost discharge path through the target device and the first target bridge arm conversion circuit, the second target bridge arm conversion circuit and the battery module, so as to boost and discharge the target device through the battery module, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit. It can boost and discharge the target device when the input voltage of the target device is greater than the discharge voltage of the battery module, and can avoid the problem of being unable to discharge the power-deficient vehicle due to emergencies, thereby effectively improving the flexibility and practicality of vehicle discharge, which is conducive to improving user experience and satisfaction.

[0094] Figure 8 is a circuit diagram of a charging and discharging circuit shown in the eighth embodiment of the present disclosure, such as Figure 8 As shown, the controller 101 is used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first specified time period of each control cycle when the charge and discharge request is a step-down charging request, so as to form a first step-down charging path between the target device 107 and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module 104, so that the target device 107 charges the battery module 104.

[0095] Wherein, the target device 107 can be a charging pile or other charging device with a charging function. In the case of receiving a charging instruction, if it is determined that the output voltage of the target device 107 is greater than the charging voltage of the battery module 104, it is determined that the charge and discharge request is a step-down charging request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. The current output by the positive electrode of the target device 107 passes through the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the first switch 109, the second winding in the second target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the positive electrode of the battery module 104 and the negative electrode of the battery module 104, and returns to the negative end of the target device 107.

[0096] It should be noted that when determining one or less first target bridge arm conversion circuits from one or more first bridge arm change circuits, in each control cycle, the first target bridge arm conversion circuit is cyclically selected and determined from one or more first bridge arm change circuits. For example, when the first motor electronic control component is a three-phase motor, the three-phase motor includes three first bridge arm conversion circuits U, W, and V. When determining a first target bridge arm conversion circuit from one or more first bridge arm change circuits, in the first control cycle, U can be selected as the first target bridge arm conversion circuit, in the second control cycle, W can be selected as the first target bridge arm conversion circuit, in the third control cycle, V can be selected as the first target bridge arm conversion circuit, and in the fourth control cycle, U can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is cyclically determined in sequence. When determining the first target bridge arm conversion circuit less than the number of the first bridge arm change circuits from one or more first bridge arm change circuits, in the first control cycle, U and W can be selected as the first target bridge arm conversion circuit, in the second control cycle, W and V can be selected as the first target bridge arm conversion circuit, in the third control cycle, V and U can be selected as the first target bridge arm conversion circuit, in the fourth control cycle, U and W can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is determined in turn in a cycle. The method for determining the second target bridge arm conversion circuit is similar to the method for determining the first target bridge arm conversion circuit described above, and will not be repeated here. By alternately determining the first target bridge arm conversion circuit from one or more first bridge arm change circuits, or alternately determining the second target bridge arm conversion circuit from one or more second bridge arm change circuits, it is possible to avoid overheating of a single bridge arm, improve the overall heat dissipation efficiency, and extend the service life of the first bridge arm conversion circuit and the second bridge arm conversion circuit.

[0097] The above technical scheme forms a first step-down charging path through the target device, the first target bridge arm conversion circuit, the second target bridge arm conversion circuit and the battery module, so that the target device can step down and charge the battery module. When the output voltage of the target device is greater than the charging voltage of the battery module, the battery module can be stepped down and charged, which can reduce energy loss during charging and improve energy conversion efficiency, thereby effectively improving charging efficiency. It can also avoid the problem of shortening the service life of the battery module due to excessive heat generated by increased charging current caused by the output power of the target device being greater than the charging power of the battery module, thereby effectively improving charging safety.

[0098] Fig. 9 is a circuit diagram of a charging and discharging circuit shown in the ninth embodiment of the present disclosure, such as Fig. 9As shown, the controller 101 is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be cut off, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be cut off within the second specified time period of each control cycle, so as to form a second step-down charging path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit charge the battery module 104.

[0099] Wherein, the target device 107 can be a charging pile or other charging device with charging function. In the case of receiving a charging instruction, if it is determined that the output voltage of the target device 107 is greater than the charging voltage of the battery module 104, it is determined that the charge and discharge request is a step-down charging request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned off, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned off. In the first specified time period, the target device 107 charges the first winding in the first target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module 104; in the second specified time period, the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit output the electric energy provided by the target device 107 to the battery module 104. In the second specified time period, the current output from the positive pole of the first winding in the first target bridge arm conversion circuit passes through the first switch 109, the second winding in the second target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the positive pole of the battery module 104, the negative pole of the battery module 104, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, and returns to the negative end of the first winding in the first target bridge arm conversion circuit.

[0100] The above technical scheme forms a second step-down charging path through the first target bridge arm conversion circuit, the second target bridge arm conversion circuit and the battery module, so that the first target bridge arm conversion circuit and the second target bridge arm conversion circuit can step down and charge the battery module. When the output voltage of the target device is greater than the charging voltage of the battery module, the battery module can be stepped down and charged through the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, which can reduce energy loss during charging and improve energy conversion efficiency, thereby effectively improving charging efficiency; it can also avoid the problem of shortening the service life of the battery module due to excessive heat generated by the increase in charging current due to the output power of the target device being greater than the charging power of the battery module, thereby effectively improving charging safety and reliability.

[0101] Fig.10 is a circuit diagram of a charging and discharging circuit shown in the tenth embodiment of the present disclosure, such as Fig.10 As shown, the controller 101 is used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first preset time period of each control cycle when the charge and discharge request is a step-down discharge request, so as to form a first step-down discharge path between the target device 107 and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module, so that the battery module 104 discharges the target device 107, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit.

[0102] The target device 107 may be a vehicle that needs to be charged. When a discharge instruction is received, if it is determined that the input voltage of the target device 107 is less than the discharge voltage of the battery module 104, the charge and discharge request is determined to be a step-down discharge request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. The current output by the positive electrode of the battery module 104 passes through the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, the first switch 109, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the negative terminal of the target device 107, the positive terminal of the target device 107, and returns to the negative terminal of the battery module 104.

[0103] It should be noted that when determining one or less first target bridge arm conversion circuits from one or more first bridge arm change circuits, in each control cycle, the first target bridge arm conversion circuit is cyclically selected and determined from one or more first bridge arm change circuits. For example, when the first motor electronic control component is a three-phase motor, the three-phase motor includes three first bridge arm conversion circuits U, W, and V. When determining a first target bridge arm conversion circuit from one or more first bridge arm change circuits, in the first control cycle, U can be selected as the first target bridge arm conversion circuit, in the second control cycle, W can be selected as the first target bridge arm conversion circuit, in the third control cycle, V can be selected as the first target bridge arm conversion circuit, and in the fourth control cycle, U can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is cyclically determined in sequence. When determining the first target bridge arm conversion circuit less than the number of the first bridge arm change circuits from one or more first bridge arm change circuits, in the first control cycle, U and W can be selected as the first target bridge arm conversion circuit, in the second control cycle, W and V can be selected as the first target bridge arm conversion circuit, in the third control cycle, V and U can be selected as the first target bridge arm conversion circuit, in the fourth control cycle, U and W can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is determined in turn in a cycle. The method for determining the second target bridge arm conversion circuit is similar to the method for determining the first target bridge arm conversion circuit described above, and will not be repeated here. By alternately determining the first target bridge arm conversion circuit from one or more first bridge arm change circuits, or alternately determining the second target bridge arm conversion circuit from one or more second bridge arm change circuits, it is possible to avoid overheating of a single bridge arm, improve the overall heat dissipation efficiency, and extend the service life of the first bridge arm conversion circuit and the second bridge arm conversion circuit.

[0104] The above technical scheme forms a first step-down discharge path through the target device, the first target bridge arm conversion circuit, the second target bridge arm conversion circuit and the battery module, so that the battery module can perform step-down discharge on the target device. It can perform step-down discharge on the target device when the input voltage of the target device is less than the discharge voltage of the battery module, and can effectively avoid the problem of being unable to charge a power-deficient vehicle due to an emergency, and can effectively improve the flexibility and practicality of vehicle discharge, which is beneficial to improving user experience and satisfaction.

[0105] Fig.11 is a circuit diagram of a charging and discharging circuit shown in the eleventh embodiment of the present disclosure, such as Fig.11As shown, the controller 101 is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the second preset time period of each control cycle, so as to form a second step-down discharge path between the target device 107 and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit discharge the target device 107.

[0106] Wherein, the target device 107 may be a vehicle that needs to be charged. In the case of receiving a discharge instruction, if it is determined that the input voltage of the target device 107 is less than the discharge voltage of the battery module 104, it is determined that the charge and discharge request is a step-down discharge request. At this time, the first switch 109 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. In the first preset time period, the battery module 104 discharges the first winding in the first target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the target device 107. In the second specified time period, the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit output the electric energy provided by the battery module 104 to the target device 107. In the second specified time period, the current output from the positive pole of the second winding in the second target bridge arm conversion circuit passes through the first switch 109, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the negative terminal of the target device 107, the positive terminal of the target device 107, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and returns to the negative terminal of the second winding in the second target bridge arm conversion circuit.

[0107] The above technical scheme forms a second step-down discharge path through the target device and the first target bridge arm conversion circuit, the second target bridge arm conversion circuit and the battery module, so as to perform step-down discharge on the target device through the first target bridge arm conversion circuit and the second target bridge arm conversion circuit. The target device can be discharged when the input voltage of the target device is less than the discharge voltage of the battery module, and the problem of being unable to discharge the power-deficient vehicle due to emergencies can be effectively avoided. The flexibility and practicality of vehicle discharge can be effectively improved, which is beneficial to improving user experience and satisfaction.

[0108] Fig.12 is a circuit diagram of a charging and discharging circuit shown in the twelfth embodiment of the present disclosure, such as Fig.12 As shown, the charging and discharging circuit further includes a second switch 110, one end of the second switch 110 is connected to the charging and discharging interface 105, and the other end of the second switch 110 is connected to the battery module 104.

[0109] The controller 101 is used to control the first switch 109 to be closed and the second switch 110 to be disconnected within the first duration period of each control cycle when the current temperature of the battery module 104 is less than or equal to a preset temperature threshold, and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on, so as to form a first self-heating path between the battery module 104 and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so as to heat the battery module 104.

[0110] Wherein, when the current temperature is less than or equal to the preset temperature threshold, the first switch 109 is closed, the second switch 110 is opened, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. During the first duration period, the current output by the positive electrode of the battery module 104 passes through the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, the first switch 109, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, and returns to the negative terminal of the battery module 104.

[0111] It should be noted that when determining one or less first target bridge arm conversion circuits from one or more first bridge arm change circuits, in each control cycle, the first target bridge arm conversion circuit is cyclically selected and determined from one or more first bridge arm change circuits. For example, when the first motor electronic control component is a three-phase motor, the three-phase motor includes three first bridge arm conversion circuits U, W, and V. When determining a first target bridge arm conversion circuit from one or more first bridge arm change circuits, in the first control cycle, U can be selected as the first target bridge arm conversion circuit, in the second control cycle, W can be selected as the first target bridge arm conversion circuit, in the third control cycle, V can be selected as the first target bridge arm conversion circuit, and in the fourth control cycle, U can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is cyclically determined in sequence. When determining the first target bridge arm conversion circuit less than the number of the first bridge arm conversion circuits from one or more first bridge arm conversion circuits, in the first control cycle, U and W can be selected as the first target bridge arm conversion circuit, in the second control cycle, W and V can be selected as the first target bridge arm conversion circuit, in the third control cycle, V and U can be selected as the first target bridge arm conversion circuit, in the fourth control cycle, U and W can be selected as the first target bridge arm conversion circuit, and the first target bridge arm conversion circuit is determined in turn in a cycle. The method for determining the second target bridge arm conversion circuit is similar to the method for determining the first target bridge arm conversion circuit, and will not be repeated here.

[0112] The above technical solution forms a first self-heating path through the battery module, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, which can heat the battery module when the current temperature of the battery module is less than or equal to a preset temperature threshold, thereby avoiding the problem of fast power consumption caused by the low temperature of the battery module, thereby effectively improving the user experience and satisfaction.

[0113] Fig.13 is a circuit diagram of a charging and discharging circuit shown in the thirteenth embodiment of the present disclosure, such as Fig.13As shown, the controller 101 is also used to control the second switch 110 to close during the second duration period of each control cycle, and to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, so as to form a second self-heating path between the battery module and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit through the second switch 110 to heat the battery module 104.

[0114] Wherein, in the second duration period, the second switch 110 is closed, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit is turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit is turned on. In the first duration period, the battery module 104 discharges the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit, and in the second duration period, the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit charge the battery module 104. During the second duration period, the current output from the positive pole of the second winding in the second target bridge arm conversion circuit passes through the first switch 109, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the second switch 110, the positive pole of the battery module 104, the negative pole of the battery module 104, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and returns to the negative end of the second winding in the second target bridge arm conversion circuit.

[0115] The above technical solution forms a second self-heating path through the battery module, the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, which can heat the battery module when the current temperature of the battery module is less than or equal to a preset temperature threshold, thereby avoiding the problem of fast power consumption caused by the low temperature of the battery module, thereby effectively improving the user experience and satisfaction.

[0116] Fig.14 is a block diagram of a vehicle 1400 according to an exemplary embodiment. Fig.14 As shown, the vehicle includes the above-mentioned charging and discharging circuit 100.

[0117] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0118] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0119] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A charging and discharging circuit, characterized in that: The charge and discharge circuit includes a controller, a charge and discharge interface connected to the controller, a charging interface, a battery module, a charge and discharge module and a target motor electronic control component, one end of the charge and discharge module is connected to the charge and discharge interface, and the other end is connected to the battery module, one end of the target motor electronic control component is connected to the battery module, and the other end is connected to the charging interface, the charge and discharge interface is used to connect to the target device, and the charging interface is used to connect to the charging device; The controller is used to control the charging and discharging module, the battery module and the target device to form a charging path or a discharging path according to a charging and discharging request; The controller is further used to control the target motor electronic control component to form a charging path with the battery module and the charging device according to a charging request; The charging and discharging module includes a first motor electronic control component, a second motor electronic control component and a first switch. The first motor electronic control component includes one or more first bridge arm conversion circuits, each of which includes a first bridge arm and a first winding, and the second motor electronic control component includes one or more second bridge arm conversion circuits, each of which includes a second bridge arm and a second winding; For each first bridge arm conversion circuit, the first end of the first winding is connected to the midpoint of the first bridge arm, the second end of the first winding is connected to the first end of the first switch, and the bus terminal of the first bridge arm is connected to the charge and discharge interface; For each second bridge arm conversion circuit, the first end of the second winding is connected to the midpoint of the second bridge arm, the second end of the second winding is connected to the second end of the first switch, and the bus end of the second bridge arm is connected to the battery module.

2. The charge and discharge circuit according to claim 1, characterized in that: The target motor electronic control component includes one or more target bridge arm conversion circuits, each of which includes a target bridge arm and a target winding; For each target bridge arm conversion circuit, the first end of the target winding is connected to the midpoint of the target bridge arm, the second end of the target winding is connected to the charging interface, and the bus end of the target bridge arm is connected to the battery module.

3. The charge and discharge circuit according to claim 2, characterized in that: The controller is used to determine at least one designated bridge arm conversion circuit from the one or more target bridge arm conversion circuits according to the charging request, and form a charging path with the battery module and the charging device through the designated bridge arm conversion circuit.

4. The charge and discharge circuit according to claim 3, characterized in that: The controller is used to control the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned on within the first predetermined time period of each control cycle when the charging request is a boost charging request, so as to form a first boost charging path between the charging device and the target winding in the designated bridge arm conversion circuit, and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit, so that the charging device can charge the target winding in the designated bridge arm conversion circuit.

5. The charge and discharge circuit according to claim 4, characterized in that: The controller is also used to control the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned on and the lower bridge arm of the target bridge arm in the designated bridge arm conversion circuit to be turned off within the second predetermined time period of each control cycle, so as to form a second boost charging path between the charging device and the upper bridge arm of the target bridge arm in the designated bridge arm conversion circuit, the target winding in the designated bridge arm conversion circuit, and the battery module, so that the charging device and the target winding in the designated bridge arm conversion circuit charge the battery module.

6. The charge and discharge circuit according to claim 1, characterized in that: The controller is used to determine at least one first target bridge arm conversion circuit from the one or more first bridge arm conversion circuits and at least one second target bridge arm conversion circuit from the one or more second bridge arm conversion circuits according to the charge and discharge request, control the first switch to close, and form a charging path or a discharging path through the first target bridge arm conversion circuit and the second target bridge arm conversion circuit, and the first switch, the battery module and the target device.

7. The charge and discharge circuit according to claim 6, characterized in that: The controller is used for controlling the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on during the first standby time period of each control cycle when the charge and discharge request is a boost charging request, so as to form a third boost charging path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so as to charge the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit.

8. The charge and discharge circuit according to claim 7, characterized in that: The controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off during the second standby time period of each control cycle, so as to form a fourth boost charging path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module, so that the target device, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit charge the battery module.

9. The charge and discharge circuit according to claim 6, characterized in that: The controller is used for controlling the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within a first set time period of each control cycle when the charge and discharge request is a boost discharge request, so as to form a first boost discharge path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the battery module discharges the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit.

10. The charge and discharge circuit according to claim 9, characterized in that: The controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off within the second set time period of each control cycle, so as to form a second boost discharge path between the battery module and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit and the target device, so that the battery module, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit discharge the target device.

11. The charge and discharge circuit according to claim 6, characterized in that: The controller is used for controlling the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first specified time period of each control cycle when the charge and discharge request is a step-down charging request, so as to form a first step-down charging path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module, so that the target device charges the battery module.

12. The charge and discharge circuit according to claim 11, characterized in that: The controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be cut off, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be cut off within the second specified time period of each control cycle, so as to form a second step-down charging path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit charge the battery module.

13. The charge and discharge circuit according to claim 6, characterized in that: The controller is used for controlling the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within a first preset time period of each control cycle when the charge and discharge request is a step-down discharge request, so as to form a first step-down discharge path between the target device and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, the second winding in the second target bridge arm conversion circuit, and the battery module, so that the battery module discharges the target device, the first winding in the first target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit.

14. The charge and discharge circuit according to claim 13, characterized in that: The controller is also used to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the second preset time period of each control cycle, so as to form a second step-down discharge path between the target device and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so that the first winding in the first target bridge arm conversion circuit and the second winding in the second target bridge arm conversion circuit discharge the target device.

15. The charge and discharge circuit according to claim 6, characterized in that: The charge and discharge circuit further includes a second switch, one end of the second switch is connected to the charge and discharge interface, and the other end of the second switch is connected to the battery module. The controller is used to control the second switch to be disconnected, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, and the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on within the first duration period of each control cycle when the current temperature of the battery module is less than or equal to a preset temperature threshold, so as to form a first self-heating path between the battery module and the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit, so as to heat the battery module.

16. The charge and discharge circuit according to claim 15, characterized in that: The controller is also used to control the second switch to close during the second duration period of each control cycle, and to control the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned on, the lower bridge arm of the first bridge arm in the first target bridge arm conversion circuit to be turned off, the upper bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned off, and the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit to be turned on, so as to form a second self-heating path between the battery module and the upper bridge arm of the first bridge arm in the first target bridge arm conversion circuit, the first winding in the first target bridge arm conversion circuit, the lower bridge arm of the second bridge arm in the second target bridge arm conversion circuit, and the second winding in the second target bridge arm conversion circuit through the second switch to heat the battery module.

17. A vehicle, characterized in that: The vehicle comprises: a charging and discharging circuit as described in any one of claims 1-16.

Images