Charging circuit and vehicle

Abstract

The present disclosure relates to a charging circuit and a vehicle. The charging circuit can be connected to a battery pack through the electronic control component by providing a first charging interface and a second charging interface, and the electronic control component can be controlled by a controller according to the connection between the first charging interface and the second charging interface and the charging device to achieve independent control of two charging circuits, and can flexibly switch between a single charging circuit and two charging circuits, so that the battery pack can be charged separately through one charging circuit, or the battery pack can be charged simultaneously through two charging circuits, which can not only effectively ensure charging reliability, but also effectively improve the charging efficiency of the vehicle when charging through the two charging circuits.

Description

Technical Field

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

[0002] With the development of society, vehicles have become an indispensable means of transportation in people's lives. Among them, electric vehicles are popular among users because of their energy saving and environmental protection. Correspondingly, the charging efficiency and reliability of vehicles have also become the focus of users' attention. However, current vehicles still cannot overcome the problems of low charging efficiency and poor charging reliability. Summary of the invention

[0003] In order to achieve the above objectives, the present disclosure provides a charging circuit and a vehicle.

[0004] A first aspect of the present disclosure provides a charging circuit, the charging circuit comprising: a controller, a battery pack, an electronic control component, a first charging interface and a second charging interface, the first charging interface being used to connect a first charging device, and the second charging interface being used to connect a second charging device;

[0005] The electric control assembly is connected to the battery pack, the first charging interface and the second charging interface;

[0006] The controller is connected to the first charging interface, the second charging interface and the electronic control component, and is used to control the first charging interface and / or the second charging interface to form a charging path with the battery pack through the electronic control component when it is determined that the first charging interface is connected to the first charging device and / or the second charging interface is connected to the second charging device.

[0007] Optionally, the input end of the electronic control component is connected to the first charging interface and the second charging interface, and the output end of the electronic control component is connected to the battery pack.

[0008] Optionally, the input end of the electric control component includes a first input end and a second input end.

[0009] The first input end is connected to the first end of the first charging interface;

[0010] The second input end is connected to the first end of the second charging interface;

[0011] The first output end of the electronic control component is connected to the first end of the battery pack, and the second output end of the electronic control component is connected to the second end of the battery pack, the second end of the first charging interface, and the second end of the second charging interface.

[0012] Optionally, the charging circuit further comprises: a first inductive element, and the electric control component comprises a first bridge arm;

[0013] The first end of the first bridge arm is connected to the first end of the battery pack, the midpoint of the first bridge arm is connected to the first end of the first charging interface through the first inductive element, and the second end of the first bridge arm is connected to the second end of the battery pack, the second end of the first charging interface, and the second end of the second charging interface.

[0014] Optionally, the controller is connected to the first bridge arm, and is used to control the upper arm and the lower arm of the first bridge arm to be alternately turned on when it is determined that the first charging interface is connected to the first charging device, so that the first inductive element is alternately charged and discharged, so that the first charging device can boost and charge the battery pack.

[0015] Optionally, the charging circuit further includes: a second inductive element, and the electric control component further includes a second bridge arm;

[0016] The first end of the second bridge arm is connected to the first end of the first bridge arm, the midpoint of the second bridge arm is connected to the first end of the second charging interface through the second inductive element, and the second end of the second bridge arm is connected to the second end of the first bridge arm.

[0017] Optionally, the controller is further connected to the second bridge arm, and is used to control the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on when it is determined that the second charging interface is connected to the second charging device, so that the second inductive element is alternately charged and discharged, so that the second charging device boosts and charges the battery pack;

[0018] The controller is also used to control the upper bridge arm and the lower bridge arm of the first bridge arm and the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on when it is determined that the first charging interface is connected to the first charging device and the second charging interface is connected to the second charging device, so that the first inductive element and the second inductive element are alternately charged and discharged, so that the first charging device and the second charging device can boost and charge the battery pack.

[0019] Optionally, the charging circuit further comprises: a first heating switch, and the battery pack comprises a first battery group and a second battery group connected in series;

[0020] A first end of the first heating switch is connected to a first end of the first charging interface, and a second end of the first heating switch is connected to a negative electrode of the first battery pack and a positive electrode of the second battery pack.

[0021] Optionally, the controller is also connected to the first heating switch, and is used to control the first heating switch to close when it is determined that the second charging interface is connected to the second charging device and when it is determined that the current temperature of the battery pack of the battery pack is less than a preset temperature threshold, so that the upper bridge arm and the lower bridge arm of the first bridge arm are alternately turned on, so that the first inductive element is alternately charged and discharged to heat the battery pack.

[0022] Optionally, the charging circuit further comprises: a second heating switch;

[0023] The first end of the second heating switch is connected to the midpoint of the second bridge arm through the second inductive element, and the second end of the second heating switch is connected to the second end of the first heating switch.

[0024] Optionally, the controller is also connected to the second heating switch, and is used to control the second heating switch to close, and the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on, so that the second inductive element is alternately charged and discharged to heat the battery pack, when it is determined that the first charging interface is connected to the first charging device and the current temperature of the battery pack is less than the preset temperature threshold.

[0025] Optionally, the charging circuit further includes: a charging switch and a first switch;

[0026] The first end of the charging switch is connected to the first end of the battery pack, and the second end of the charging switch is connected to the first end of the first charging interface and the first end of the first switch;

[0027] The second end of the first switch is connected to the first end of the first heating switch.

[0028] Optionally, the controller is also connected to the charging switch and the first switch, and is used to control the charging switch and the first heating switch to close and the first switch to open, so that the battery pack can be heated while in a charging state, when it is determined that the first charging interface is connected to the first charging device and the second charging interface is connected to the second charging device, and if it is determined that the current temperature of the battery pack is lower than a preset temperature threshold.

[0029] Optionally, the charging circuit further includes: a second switch, a third switch, a fourth switch and a resistor;

[0030] One end of the second switch connected in series with the resistor is connected to the first end of the third switch and the first end of the battery pack, and the other end is connected to the second end of the third switch and the first end of the first bridge arm;

[0031] A first end of the fourth switch is connected to a second end of the battery pack, and a second end of the fourth switch is connected to a second end of the first charging interface.

[0032] Optionally, the charging circuit further includes: a fifth switch and a first capacitor;

[0033] A first end of the fifth switch is connected to a second end of the first charging interface, and a second end of the fifth switch is connected to a first end of the first capacitor and a second end of the first bridge arm;

[0034] The second end of the first capacitor is connected to the first end of the first switch and the first end of the first charging interface.

[0035] Optionally, the charging circuit further includes: a sixth switch, a seventh switch and a second capacitor;

[0036] The first end of the sixth switch is connected to the midpoint of the second bridge arm through the second inductive element, and the second end of the sixth switch is connected to the first end of the second capacitor and the first end of the second charging interface;

[0037] A first end of the seventh switch is connected to a second end of the second charging interface, and a second end of the seventh switch is connected to a second end of the second capacitor and a second end of the second bridge arm.

[0038] Optionally, the charging circuit includes: a third inductive element and a third heating switch, and the electric control component further includes a third bridge arm;

[0039] The first end of the third inductive element is connected to the midpoint of the third bridge arm, the second end of the third inductive element is connected to the first end of the third heating switch, and the second end of the third heating switch is connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack;

[0040] The first end of the third bridge arm is connected to the first end of the first bridge arm, and the second end of the third bridge arm is connected to the second end of the first bridge arm.

[0041] Optionally, the controller is connected to the third bridge arm, and is used to control the third heating switch to close, and the upper bridge arm and the lower bridge arm of the third bridge arm to be alternately turned on, so that the third inductive element is alternately charged and discharged, so that the battery pack can be heated when the first charging device boosts the charging state of the battery pack through the first inductive element, and / or the second charging device boosts the charging state of the battery pack through the second inductive element, if it is determined that the current temperature of the battery pack is less than a preset temperature threshold.

[0042] A second aspect of the present disclosure provides a vehicle, comprising: the charging circuit as described above in the first aspect of the present disclosure.

[0043] Through the above technical scheme, it is possible to set a first charging interface and a second charging interface, reuse the electronic control component, connect to the battery pack through the electronic control component, and control the electronic control component through a controller according to the connection status of the first charging interface and the second charging interface with the charging device to achieve independent control of the two charging circuits. It is possible to flexibly switch between a single charging circuit and two charging circuits, so that the battery pack can be charged separately through one charging circuit, or the battery pack can be charged simultaneously through two charging circuits. This not only effectively ensures the charging reliability, but also effectively improves the charging efficiency of the vehicle when charging through two charging circuits.

[0044] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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:

[0046] Figure 1 is a schematic diagram of a charging circuit according to an exemplary embodiment of the present disclosure;

[0047] Figure 2 According to this disclosure Figure 1 A schematic diagram of a charging circuit shown in the illustrated embodiment;

[0048] Figure 3 According to this disclosure Figure 2 A schematic diagram of current flow of a charging circuit shown in the illustrated embodiment;

[0049] Figure 4 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0050] Figure 5 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0051] Figure 6 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0052] Figure 7 According to this disclosure Figure 2A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0053] Figure 8 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0054] Fig. 9 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0055] Fig.10 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0056] Fig.11 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0057] Fig.12 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0058] Fig.13 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0059] Fig.14 According to this disclosure Figure 2 A schematic diagram of current flow of another charging circuit shown in the illustrated embodiment;

[0060] Fig.15 According to this disclosure Figure 2 A schematic diagram of a charging circuit shown in the illustrated embodiment;

[0061] Fig.16 According to this disclosure Fig.15 A schematic diagram of current flow of a charging circuit shown in the illustrated embodiment;

[0062] Fig.17 It is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure.

[0063] Description of Reference Numerals

[0064] 101 controller; 102 battery pack; 1021 first battery pack; 1022 second battery pack;

[0065] 103 electric control component; 104 first charging interface; 105 second charging interface;

[0066] L1 is the first inductive element; L2 is the second inductive element; Q1 is the first heating switch;

[0067] Q2 second heating switch; Q3 charging switch; K1 first switch; K2 second switch;

[0068] K3 is the third switch; K4 is the fourth switch; K5 is the fifth switch; K6 is the sixth switch;

[0069] K7 is the seventh switch; C1 is the first capacitor; C2 is the second capacitor; R1 is the resistor; VT1 is the first switch tube;

[0070] VT2 is the second switch tube; VT3 is the third switch tube; VT4 is the fourth switch tube. DETAILED DESCRIPTION

[0071] 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.

[0072] Figure 1 is a schematic diagram of a charging circuit according to an exemplary embodiment of the present disclosure, such as Figure 1 As shown, the charging circuit may include: a controller 101, a battery pack 102, an electric control component 103, a first charging interface 104 and a second charging interface 105, wherein the first charging interface 104 may be used to connect a first charging device, and the second charging interface 105 may be used to connect a second charging device; the electric control component 103 is connected to the battery pack 102, the first charging interface 104 and the second charging interface 105; the controller 101 may be connected to the first charging interface 104, the second charging interface 105 and the electric control component 103, and is used to control the first charging interface 104 and / or the second charging interface 105 to form a charging path with the battery pack 102 through the electric control component 103 when it is determined that the first charging interface 104 is connected to the first charging device and / or the second charging interface 105 is connected to the second charging device.

[0073] The first charging interface 104 and the second charging interface 105 may be DC charging interfaces or AC charging interfaces. The first charging device and the second charging device may be different charging devices or different charging guns of the same charging device. The input end of the electric control component 103 is connected to the first charging interface 104 and the second charging interface 105, and the output end of the electric control component 103 is connected to the battery pack 102.

[0074] It should be noted that the input end of the electronic control component 103 includes a first input end and a second input end, the first input end is connected to the first end of the first charging interface 104; the second input end is connected to the first end of the second charging interface 105; the first output end of the electronic control component 103 is connected to the first end of the battery pack 102, and the second output end of the electronic control component 103 is connected to the second end of the battery pack 102, the second end of the first charging interface 104 and the second end of the second charging interface 105. The controller 101 can determine that the first charging interface 104 is connected to the first charging device by receiving a first connection signal sent by the first charging interface 104, and when the first charging interface 104 is connected to the first charging device, control the electronic control component 103 to be turned on to form a first charging path between the first charging device and the battery pack 102, and the first charging device can charge the battery pack 102 through the first charging path; the controller 101 can also determine that the second charging interface 105 is connected to the second charging device by receiving a second connection signal sent by the second charging interface 105, and when the second charging interface 105 is connected to the second charging device, control the electronic control component 103 to be turned on to form a second charging path between the second charging device and the battery pack 102, and the second charging device The battery pack 102 can be charged through the second charging path; the controller 101 can also determine that the first charging interface 104 is connected to the first charging device and the second charging interface 105 is connected to the second charging device when the first charging interface 104 is connected to the first charging device and the second charging interface 105 is connected to the second charging device, and control the electronic control component 103 to conduct when the first charging interface 104 is connected to the first charging device and the second charging interface 105 is connected to the second charging device, and simultaneously form a first charging path between the first charging device and the battery pack 102 and a second charging path between the second charging device and the battery pack 102, and the first charging device charges the battery pack 102 through the first charging path and the second charging device through the second charging path. The controller 101 can flexibly control the conduction of the electronic control component 103 according to the connection status of the charging interface, realize the separate control of the dual-path charging circuit, and can flexibly switch between a single charging circuit and two charging circuits, so that the battery pack can be charged through one charging circuit alone, or the battery pack can be charged through two charging circuits at the same time, which can not only effectively ensure the charging reliability, but also effectively improve the charging efficiency of the vehicle when charging through two charging circuits.

[0075] For example, the first charging interface 104 may be a DC charging port 1, the second charging interface 105 may be a DC charging port 2, the first charging device may be a charging gun 1 of a charging pile, and the second charging device may be a charging gun 2 of a charging pile. When the DC charging port 1 is connected to the charging gun 1, a first connection signal is sent to the controller 101. When the controller 101 receives the first connection signal sent by the DC charging port 1, it determines that the DC charging port 1 is connected to the charging gun 1, and controls the electronic control component 103 to conduct, so that a first charging path is formed between the charging gun 1 and the battery pack 102, and the charging pile charges the battery pack 102 through the first charging path. When the DC charging port 2 is connected to the charging gun 2, the controller 101 sends a second connection signal to the controller 101. When the controller 101 receives the second connection signal sent by the DC charging port 2, it determines that the DC charging port 2 is connected to the charging gun 2, and controls the electronic control component 103 to conduct, so that a second charging path is formed between the charging gun 2 and the battery pack 102, and the charging pile charges the battery pack 102 through the second charging path. When DC charging port 1 is connected to charging gun 1, a first connection signal is sent to controller 101, and when DC charging port 2 is connected to charging gun 2, a second connection signal is sent to controller 101. Controller 101 can determine that DC charging port 1 is connected to charging gun 1 and DC charging port 2 is connected to charging gun 2 when the first connection signal sent by DC charging port 1 and the second connection signal sent by DC charging port 2 are simultaneously received, and control the electronic control component 103 to be turned on, so that a first charging path is formed between charging gun 1 and battery pack 102, and a second charging path is formed between charging gun 2 and battery pack 102, and the charging pile charges the battery pack 102 through the first charging path and the second charging path.

[0076] Optionally, the controller 101 can also be used to, when it is determined that the first charging interface 104 is connected to a first charging device and the second charging interface 105 is connected to a second charging device, if the voltage provided by the first charging device is greater than or equal to the charging voltage of the battery pack 102, form a first charging path between the first charging device and the battery pack 102 through the electronic control component 103, so that the first charging device charges the battery pack 102; if the voltage provided by the second charging device is greater than or equal to the charging voltage of the battery pack 102, form a second charging path between the second charging device and the battery pack 102 through the electronic control component 103, so that the second charging device charges the battery pack 102.

[0077] The above technical scheme can realize independent control of the two charging circuits by setting a first charging interface and a second charging interface, reusing the electronic control component, connecting to the battery pack through the electronic control component, and controlling the electronic control component through a controller according to the connection status of the first charging interface and the second charging interface with the charging device. It can flexibly switch between a single charging circuit and two charging circuits, so that the battery pack can be charged separately through one charging circuit, or the battery pack can be charged simultaneously through two charging circuits. This can not only effectively ensure the charging reliability, but also effectively improve the charging efficiency of the vehicle when charging through two charging circuits.

[0078] Figure 2 According to this disclosure Figure 1 The embodiment shown is a schematic diagram of a charging circuit, such as Figure 2 As shown, the charging circuit may also include: a first inductive element L1, the electronic control component 103 may include a first bridge arm; the first end of the first bridge arm may be connected to the first end of the battery pack 102, the midpoint of the first bridge arm may be connected to the first end of the first charging interface 104 through the first inductive element L1, and the second end of the first bridge arm may be connected to the second end of the battery pack 102, the second end of the first charging interface 104 and the second end of the second charging interface 105; the controller 101 may be connected to the first bridge arm, and is used to control the upper bridge arm and the lower bridge arm of the first bridge arm to be alternately turned on when it is determined that the first charging interface 104 is connected to the first charging device, so that the first inductive element L1 is alternately charged and discharged, so that the first charging device can boost and charge the battery pack 102.

[0079] The first inductive element L1 may be an inductor, or a transformer, a motor, a speaker, a relay, a contactor, or the like.

[0080] It should be noted that the controller 101 alternately turns on the upper bridge arm and the lower bridge arm of the first bridge arm according to the first preset frequency, so that the first inductive element L1 is alternately charged and discharged, so that the first charging device boosts and charges the battery pack 102. When the controller 101 determines that the first charging interface 104 is connected to the first charging device, it controls the lower bridge arm of the first bridge arm to turn on, and a first boost path is formed between the first charging device and the first inductive element L1, so that the first charging device charges the first inductive element L1 through the first boost path, controls the upper bridge arm of the first bridge arm to turn on, and the lower bridge arm of the first bridge arm to turn off, so that a first charging path is formed between the first charging device, the first inductive element L1 and the battery pack 102, so that the first charging device and the first inductive element L1 simultaneously charge the battery pack 102 through the first charging path. The first inductive element L1 can be charged when the lower arm of the first bridge arm is turned on, and the first inductive element L1 can be discharged when the upper arm of the first bridge arm is turned on. The discharge current of the first inductive element L1 is in the same direction as the charging current of the first charging device. The first inductive element L1 can be used as a charging power source to charge the battery pack 102 simultaneously with the first charging device to achieve boost charging of the charging circuit. By reusing electronic control components, the complexity of the charging circuit control method is reduced, thereby improving the charging efficiency of the charging circuit.

[0081] For example, Figure 3 As shown, Figure 3 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of current flow of a charging circuit, the upper bridge arm of the first bridge arm may include a first switch tube VT1, the lower bridge arm of the first bridge arm may include a second switch tube VT2, the first charging interface 104 may be a DC charging port 1, the first charging device may be a charging gun 1 of a charging pile, and the controller 101 may control the second switch tube VT2 to close when it is determined that the DC charging port 1 is connected to the charging gun 1, so that a first boost path is formed between the charging gun 1 and the first inductive element L1, so that the charging gun 1 charges the first inductive element L1 through the first boost path, such as Figure 4 As shown, Figure 4 According to this disclosure Figure 2The illustrated embodiment shows a current flow diagram of a charging circuit, in which the controller 101 can control the second switch tube VT2 to be disconnected, and a first charging path is formed between the charging gun 1, the first inductive element L1 and the battery pack 102 through the parasitic diode of the first switch tube VT1, and the charging gun 1 and the first inductive element L1 simultaneously charge the battery pack 102 through the first charging path. The first switch tube VT1 and the second switch tube VT2 can be IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor), BJT (Bipolar Junction Transistors, bipolar junction transistor) or MOS (Metal-Oxide-SemiconductorField-Effect Transistor, metal-oxide semiconductor field effect transistor) tubes, etc.

[0082] Optionally, Figure 2 As shown, the charging circuit may further include: a second inductive element L2, and the electric control component 103 may further include a second bridge arm; the first end of the second bridge arm may be connected to the first end of the first bridge arm, the midpoint of the second bridge arm may be connected to the first end of the second charging interface 105 through the second inductive element L2, and the second end of the second bridge arm may be connected to the second end of the first bridge arm; the controller 101 may also be connected to the second bridge arm, and is used to control the upper bridge arm and the lower bridge arm of the second bridge arm when it is determined that the second charging interface 105 is connected to the second charging device. The controller 101 is also used to control the upper bridge arm and the lower bridge arm of the first bridge arm and the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on, so that the first inductive element L1 and the second inductive element L2 are alternately charged and discharged, so that the first charging device and the second charging device can boost the charging voltage of the battery pack 102.

[0083] The second inductive element L2 may be an inductor, or a transformer, a motor, a speaker, a relay, a contactor, or the like.

[0084] It should be noted that the controller 101 alternately turns on the upper bridge arm and the lower bridge arm of the second bridge arm according to the first preset frequency, so that the second inductive element L2 is alternately charged and discharged, so that the second charging device boosts and charges the battery pack 102. When the controller 101 determines that the second charging interface 105 is connected to the second charging device, it controls the lower bridge arm of the second bridge arm to turn on, and a second boost path is formed between the second charging device and the second inductive element L2, so that the second charging device charges the second inductive element L2 through the second boost path, controls the upper bridge arm of the second bridge arm to turn on, and the lower bridge arm of the second bridge arm to turn off, so that a second charging path is formed between the second charging device, the second inductive element L2 and the battery pack 102, so that the second charging device and the second inductive element L2 simultaneously charge the battery pack 102 through the second charging path. The second inductive element L2 can be charged when the lower arm of the second bridge arm is turned on, and the second inductive element L2 can be discharged when the upper arm of the second bridge arm is turned on. The discharge current of the second inductive element L2 is in the same direction as the charging current of the second charging device. The second inductive element L2 can be used as a charging power source to charge the battery pack simultaneously with the second charging device to achieve boost charging of the charging circuit. By reusing electronic control components, the complexity of the charging circuit control method is reduced, thereby improving the charging efficiency of the charging circuit.

[0085] For example, Figure 5 As shown, Figure 5 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of current flow of a charging circuit, the upper bridge arm of the second bridge arm may include a third switch tube VT3, the lower bridge arm of the second bridge arm may include a fourth switch tube VT4, the second charging interface 105 may be a DC charging port 2, the second charging device may be a charging gun 2 of the charging pile, and the controller 101 may control the fourth switch tube VT4 to close when it is determined that the DC charging port 2 is connected to the charging gun 2, so that a second boost path is formed between the charging gun 2 and the second inductive element L2, so that the charging gun 2 charges the second inductive element L2 through the second boost path, such as Figure 6 As shown, Figure 6 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of current flow of a charging circuit, where the controller 101 can control the fourth switch tube VT4 to be disconnected, and a second charging path is formed between the charging gun 2, the second inductive element L2 and the battery pack 102 through the parasitic diode of the third switch tube VT3, and the charging gun 2 and the second inductive element L2 simultaneously charge the battery pack 102 through the second charging path. The third switch tube VT3 and the fourth switch tube VT4 can be IGBT, BJT or MOS tube, etc.

[0086] It should also be noted that, when the controller 101 determines that the first charging interface 104 is connected to the first charging device and the second charging interface 105 is connected to the second charging device, the lower bridge arm of the first bridge arm and the lower bridge arm of the second bridge arm can be independently controlled to be turned on, and a first boost path is formed between the first charging device and the first inductive element L1, and a second boost path is formed between the second charging device and the second inductive element L2, so that the first charging device charges the first inductive element L1 through the first boost path, and the second charging device charges the second inductive element L2 through the second boost path. , and the upper arm of the first bridge arm and the upper arm of the second bridge arm can be independently controlled to be turned on, the lower arm of the first bridge arm and the lower arm of the second bridge arm can be disconnected, a first charging path is formed between the first charging device, the first inductive element L1 and the battery pack 102, and a second charging path is formed between the second charging device, the second inductive element L2 and the battery pack 102, so that the first charging device and the first inductive element L1 can charge the battery pack 102 through the first charging path at the same time, and the second charging device and the second inductive element L2 can charge the battery pack 102 through the second charging path at the same time.

[0087] For example, Figure 7 As shown, Figure 7 According to this disclosure Figure 2 The illustrated embodiment shows a current flow diagram of a charging circuit, in which the upper bridge arm of the first bridge arm may include a first switch tube VT1, the lower bridge arm of the first bridge arm may include a second switch tube VT2, the upper bridge arm of the second bridge arm may include a third switch tube VT3, the lower bridge arm of the second bridge arm may include a fourth switch tube VT4, the first charging interface 104 may be a DC charging port 1, the first charging device may be a charging gun 1 of a charging pile, the second charging interface 105 may be a DC charging port 2, the second charging device may be a charging gun 2 of a charging pile, and the controller 101 may independently control the second switch tube VT2 and the fourth switch tube VT4 to be closed when it is determined that the DC charging port 1 is connected to the charging gun 1 and the DC charging port 2 is connected to the charging gun 2, so that a first boost path is formed between the charging gun 1 and the first inductive element L1 and a second boost path is formed between the charging gun 2 and the second inductive element L2, so that the charging gun 1 charges the first inductive element L1 through the first boost path and the charging gun 2 charges the second inductive element L2 through the second boost path, as shown in FIG. Figure 8 As shown, Figure 8 According to this disclosure Figure 2The embodiment shown is a schematic diagram of current flow of a charging circuit. The controller can control the second switch tube VT2 to be disconnected, and a first charging path is formed between the charging gun 1, the first inductive element L1 and the battery pack 102 through the parasitic diode of the first switch tube VT1. The charging gun 1 and the first inductive element L1 charge the battery pack 102 through the first charging path at the same time, and control the fourth switch tube VT4 to be closed, and a second boost path is formed between the charging gun 2 and the second inductive element L2, so that the charging gun 2 charges the second inductive element L2 through the second boost path. Fig. 9 As shown, Fig. 9 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of current flow of a charging circuit. The controller can also independently control the second switch tube VT2 and the fourth switch tube VT4 to be disconnected, so that a first charging path is formed between the charging gun 1, the first inductive element L1 and the battery pack 102 through the parasitic diode of the first switch tube VT1, and the charging gun 1 and the first inductive element L1 simultaneously charge the battery pack 102 through the first charging path, and a second charging path is formed between the charging gun 2, the second inductive element L2 and the battery pack 102 through the parasitic diode of the third switch tube VT3, and the charging gun 2 and the second inductive element L2 simultaneously charge the battery pack 102 through the second charging path, as shown in FIG. Fig.10 As shown, Fig.10 According to this disclosure Figure 2 The illustrated embodiment shows a current flow diagram of a charging circuit. The controller can control the fourth switch tube VT4 to be disconnected, and form a second charging path between the charging gun 2, the second inductive element L2 and the battery pack 102 through the parasitic diode of the third switch tube VT3. The charging gun 2 and the second inductive element L2 charge the battery pack 102 through the second charging path at the same time, and control the second switch tube VT2 to be closed, and form a first boost path between the charging gun 1 and the first inductive element L1, so that the charging gun 1 charges the first inductive element L1 through the first boost path.

[0088] Optionally, Figure 2As shown, the charging circuit may also include: a first heating switch Q1, the battery pack 102 may include a first battery group 1021 and a second battery group 1022 connected in series; the first end of the first heating switch Q1 may be connected to the first end of the first charging interface 104, and the second end of the first heating switch Q1 may be connected to the negative electrode of the first battery group 1021 and the positive electrode of the second battery group 1022; the controller 101 may also be connected to the first heating switch Q1, and is used to obtain the current temperature of the battery pack 102 when it is determined that the second charging interface 105 is connected to the second charging device, and when it is determined that the current temperature of the battery pack 102 is less than a preset temperature threshold, control the first heating switch Q1 to close, and the upper bridge arm and the lower bridge arm of the first bridge arm are alternately turned on, so that the first inductive element L1 is alternately charged and discharged, so that the battery pack 102 is heated.

[0089] The first heating switch Q1 may be a relay, or a contactor, an IGBT, a BJT or a MOS tube.

[0090] It should be noted that the controller 101 alternately turns on the upper bridge arm and the lower bridge arm of the first bridge arm according to the second preset frequency, so that the first inductive element L1 is alternately charged and discharged, so as to heat the battery pack 102. The second preset frequency may be the same as or different from the first preset frequency. The first end of the first heating switch Q1 may be connected to the first end of the first charging interface 104 and the first end of the first inductive element L1, the second end of the first heating switch Q1 may be connected to the negative electrode of the first battery pack 1021 and the positive electrode of the second battery pack 1022, the second end of the first inductive element L1 may be connected to the midpoint of the first bridge arm, the first end of the first bridge arm is connected to the positive electrode of the battery pack 102, and the second end of the first bridge arm is connected to the negative electrode of the battery pack 102. When determining that the second charging interface 105 is connected to the second charging device, the controller 101 can obtain the current temperature of the battery pack 102 collected by the temperature sensor, and when determining that the current temperature of the battery pack is less than a preset temperature threshold, control the first heating switch Q1 to close, the upper arm of the first bridge arm to turn on, a first heating path to be formed between the first battery group 1021 and the first inductive element L1, and the first battery group 1021 to be heated by the current in the first heating path, control the upper arm of the first bridge arm to be disconnected, the lower arm of the first bridge arm to be turned on, a second heating path to be formed between the first inductive element L1 and the second battery group 1022, and the second battery group 1022 to be heated by the current in the second heating path. When the controller 101 controls the upper arm of the first bridge arm to be disconnected and the lower arm of the first bridge arm to be turned on, the controller 101 may first control the upper arm of the first bridge arm to be disconnected and then control the lower arm of the first bridge arm to be turned on. Due to the control accuracy of the controller 101, there is a certain time interval between the controller 101 controlling the upper arm of the first bridge arm to be disconnected and controlling the lower arm of the first bridge arm to be turned on. During this time interval, the first inductive element L1 may form a first path with the second battery pack 1022, and the second battery pack 1022 may be heated by the current in the first path. In the case where it is determined that the second charging interface 105 is connected to the second charging device, the controller 101 may control the electric control component 103 as follows: Figure 5 to Figure 6 By reusing the electric control component 103 and controlling the first heating switch Q1 and the electric control component 103 when the battery pack 102 is at a low temperature, the first inductive element L1 and the battery pack 102 form a path to heat the battery pack 102 and improve the charging efficiency of the charging circuit.

[0091] For example, Fig.11 As shown, Fig.11 According to this disclosure Figure 2The illustrated embodiment shows a current flow diagram of a charging circuit, the upper bridge arm of the first bridge arm may be the first switch tube VT1, the lower bridge arm of the first bridge arm may be the second switch tube VT2, the second charging interface 105 may be the DC charging port 2, the second charging device may be the charging gun 2 of the charging pile, the controller 101 may obtain the current temperature of the battery pack 102 collected by the temperature sensor when it is determined that the DC charging port 2 is connected to the charging gun 2, and when it is determined that the current temperature of the battery pack 102 is less than the preset temperature threshold, the first heating switch Q1 and the first switch tube VT1 are controlled to be closed, a first heating path is formed between the first battery pack 1021 and the first inductive element L1, the first battery pack 1021 charges the first inductive element L1, and the first battery pack 1021 is heated by the current in the first heating path, such as Fig.12 As shown, Fig.12 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of current flow of a charging circuit. The controller 101 can control the first switch tube VT1 to be disconnected. Through the parasitic diode of the second switch tube VT2, the first inductive element L1 and the second battery pack 1022 form a first path, and the second battery pack 1022 is heated by the current in the first path. Fig.13 As shown, Fig.13 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of current flow of a charging circuit. The controller 101 can control the second switch tube VT2 to be closed, and a second heating path is formed between the first inductive element L1 and the second battery group 1022. The second battery group 1022 charges the first inductive element L1, and the second battery group 1022 is heated by the current in the second heating path. Fig.14 As shown, Fig.14 According to this disclosure Figure 2 The illustrated embodiment shows a current flow diagram of a charging circuit, in which the controller 101 can control the second switch tube VT2 to be disconnected, and the first inductive element L1 can form a second path with the first battery group 1021 through the parasitic diode of the first switch tube VT1, and the first battery group 1021 is heated by the current in the second path.

[0092] Optionally, the controller 101 can also be used to obtain the current temperature of the battery pack 102 when a discharge signal is received, and when it is determined that the current temperature of the battery pack 102 is less than a preset temperature threshold, control the first heating switch Q1 to close, and the upper bridge arm and the lower bridge arm of the first bridge arm are alternately turned on, so that the first inductive element L1 is alternately charged and discharged, so as to heat the battery pack 102.

[0093] The above technical scheme can realize independent control of the two charging circuits by setting a first charging interface and a second charging interface, reusing the electronic control component, connecting to the battery pack through the electronic control component, and controlling the electronic control component through a controller according to the connection status of the first charging interface and the second charging interface with the charging device. It can flexibly switch between a single charging circuit and two charging circuits, so that the battery pack can be charged separately through one charging circuit, or the battery pack can be charged simultaneously through two charging circuits. This can not only effectively ensure the charging reliability, but also effectively improve the charging efficiency of the vehicle when charging through two charging circuits.

[0094] Fig.15 According to this disclosure Figure 2 The embodiment shown is a schematic diagram of a charging circuit, such as Fig.15 As shown, the charging circuit may further include: a second heating switch Q2; the first end of the second heating switch Q2 may be connected to the midpoint of the second bridge arm through the second inductive element L2, and the second end of the second heating switch Q2 may be connected to the second end of the first heating switch Q1; the controller 101 may also be connected to the second heating switch Q2, and is used to control the second heating switch Q2 to close, and the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on, so that the second inductive element L2 is alternately charged and discharged, so that the battery pack 102 is heated.

[0095] The second heating switch Q2 may be a relay, a contactor, an IGBT, a BJT or a MOS tube, etc.

[0096] It should be noted that the controller 101 alternately turns on the upper bridge arm and the lower bridge arm of the second bridge arm according to the second preset frequency, so that the second inductive element L2 is alternately charged and discharged, so as to heat the battery pack 102. The first end of the second heating switch Q2 can be connected to the first end of the second charging interface 105 and the first end of the second inductive element L2, the second end of the second heating switch Q2 can be connected to the second end of the first heating switch Q1, the negative electrode of the first battery pack 1021 and the positive electrode of the second battery pack 1022, the second end of the second inductive element L2 can be connected to the midpoint of the second bridge arm, the first end of the second bridge arm is connected to the positive electrode of the battery pack 102, and the second end of the second bridge arm is connected to the negative electrode of the battery pack 102. When determining that the first charging interface 104 is connected to the first charging device, the controller 101 can obtain the current temperature of the battery pack 102 collected by the temperature sensor, and when determining that the current temperature of the battery pack 102 is less than a preset temperature threshold, control the second heating switch Q2 to close, the upper bridge arm of the second bridge arm to turn on, a third heating path is formed between the first battery group 1021 and the second inductive element L2, and the first battery group 1021 is heated by the current in the third heating path, control the upper bridge arm of the second bridge arm to be disconnected, the lower bridge arm of the second bridge arm to be turned on, a fourth heating path is formed between the second inductive element L2 and the second battery group 1022, and the second battery group 1022 is heated by the current in the fourth heating path. When the controller 101 controls the upper arm of the second bridge arm to be disconnected and the lower arm of the second bridge arm to be turned on, the upper arm of the second bridge arm can be controlled to be disconnected first, and then the lower arm of the second bridge arm can be controlled to be turned on. Due to the control accuracy of the controller 101, there is a certain time interval between the controller 101 controlling the upper arm of the second bridge arm to be disconnected and the controller controlling the lower arm of the second bridge arm to be turned on. During this time interval, the second inductive element L2 can form a third path with the second battery pack 1022, and the second battery pack 1022 is heated by the current in the third path. In which, when it is determined that the first charging interface 104 is connected to the first charging device, the controller 101 can control the electric control component 103 as follows: Figure 3 to Figure 4 By reusing the electric control component 103 and controlling the second heating switch Q2 and the electric control component 103 when the battery pack 102 is at a low temperature, the second inductive element L2 and the battery pack 102 form a path to heat the battery pack 102 and improve the charging efficiency of the charging circuit.

[0097] For example, the upper bridge arm of the second bridge arm may be the third switch tube VT3, the lower bridge arm of the second bridge arm may be the fourth switch tube VT4, the first charging interface 104 may be a DC charging port 1, and the first charging device may be a charging gun 1 of a charging pile. The controller 101 may, when determining that the DC charging port 1 is connected to the charging gun 1, control the second heating switch Q2 and the third switch tube VT3 to close if it is determined that the current temperature of the battery pack is less than a preset temperature threshold, so that a third heating path is formed between the first battery group 1021 and the second inductive element L2, the first battery group 1021 charges the second inductive element L2, and the first battery group 1021 is heated by the current in the third heating path. The controller 101 may control the third switch tube VT3 to be disconnected, and the third heating path may be used to heat the first battery group 1021. The parasitic diode of the fourth switch tube VT4 forms a third path between the second battery group 1022 and the second inductive element L2, and the second battery group 1022 is heated by the current in the third path. The controller 101 can control the fourth switch tube VT4 to close, and a fourth heating path is formed between the second inductive element L2 and the second battery group 1022. The second battery group 1022 charges the second inductive element L2, and the second battery group 1022 is heated by the current in the fourth heating path. The controller 101 can control the fourth switch tube VT4 to open, and a fourth path is formed between the first battery group 1021 and the second inductive element L2 through the parasitic diode of the third switch tube VT3, and the first battery group 1021 is heated by the current in the fourth path.

[0098] Optionally, the controller 101 can also be used to obtain the current temperature of the battery pack 102 when a discharge signal is received, and when it is determined that the current temperature of the battery pack 102 is less than a preset temperature threshold, control the second heating switch Q2 to close, and the upper bridge arm and the lower bridge arm of the second bridge arm are alternately turned on, so that the second inductive element L2 is alternately charged and discharged, so as to heat the battery pack 102.

[0099] Optionally, Fig.15 As shown, the charging circuit may further include: a charging switch Q3 and a first switch K1; the first end of the charging switch Q3 may be connected to the first end of the battery pack 102, and the second end of the charging switch Q3 may be connected to the first end of the first charging interface 104 and the first end of the first switch K1; the second end of the first switch K1 may be connected to the first end of the first heating switch Q1; the controller 101 may also be connected to the charging switch Q3 and the first switch K1, and is used to control the charging switch Q3 and the first heating switch Q1 to be closed and the first switch K1 to be disconnected when it is determined that the first charging interface 104 is connected to the first charging device and the second charging interface 105 is connected to the second charging device, and when it is determined that the current temperature of the battery pack 102 is less than a preset temperature threshold, so that the battery pack 102 is heated while in a charging state.

[0100] The charging switch Q3 and the first switch K1 may be relays, contactors, IGBTs, BJTs or MOS tubes, etc.

[0101] It should be noted that, when the battery pack 102 is charged simultaneously through the first charging interface 104 and the second charging interface 105, if it is determined that the current temperature of the battery pack 102 is less than the preset temperature threshold, the controller 101 can control the charging switch Q3 to close and the first switch K1 to disconnect, so that the first charging device can directly charge the battery pack 102 through the first charging interface 104. At the same time, the controller 101 can also control the upper bridge arm and the lower bridge arm of the first bridge arm to be alternately turned on, the first heating switch Q1 to be closed, and the first inductive element L1 to be alternately charged and discharged, so that the battery pack 102 is heated while in the charging state.

[0102] For example, Fig.16 As shown, Fig.16 According to this disclosure Fig.15 The illustrated embodiment shows a current flow diagram of a charging circuit, in which the controller 101 controls the charging switch Q3 to close, and the charging current flows from the DC charging port 1 through the charging switch Q3 to the positive electrode of the battery pack 102, and flows from the negative electrode of the battery pack 102 to the negative electrode of the DC charging port 1.

[0103] Optionally, Fig.15 As shown, the charging circuit may further include: a second switch K2, a third switch K3, a fourth switch K4 and a resistor R1; one end of the second switch K2 connected in series with the resistor is connected to the first end of the third switch K3 and the first end of the battery pack 102, and the other end is connected to the second end of the third switch K3 and the first end of the first bridge arm; the first end of the fourth switch K4 is connected to the second end of the battery pack 102, and the second end of the fourth switch K4 is connected to the second end of the first charging interface.

[0104] The second switch K2, the third switch K3 and the fourth switch K4 may be relays, contactors, IGBTs, BJTs or MOS tubes, etc.

[0105] It should be noted that the controller 101 can be connected to the second switch K2, the third switch K3 and the fourth switch K4, and is used to control the second switch K2 and the fourth switch K4 to be closed when it is determined that the first charging interface 104 is connected to the first charging device, and control the upper bridge arm and the lower bridge arm of the first bridge arm to be alternately turned on, so that the first charging device pre-charges the battery pack 102 through the first inductive element L1 and the electronic control component 103, and when it is determined that the current in the pre-charging path is within the preset current range, control the second switch K2 to be disconnected, the third switch K3 to be closed, and control the upper bridge arm and the lower bridge arm of the first bridge arm to be alternately turned on, so that the first charging device boosts the battery pack 102 through the first inductive element L1 and the electronic control component 103. In particular, when the controller 101 determines that the first charging interface 104 is connected to the first charging device, it can first control the fourth switch K4 to be closed, and then control the second switch K2 to be closed, or it can control the second switch K2 and the fourth switch K4 to be closed at the same time.

[0106] Optionally, Fig.15 As shown, the charging circuit may further include: a fifth switch K5 and a first capacitor C1; the first end of the fifth switch K5 is connected to the second end of the first charging interface 104, and the second end of the fifth switch K5 is connected to the first end of the first capacitor C1 and the second end of the first bridge arm; the second end of the first capacitor C1 is connected to the first end of the first switch K1 and the first end of the first charging interface 104.

[0107] The fifth switch K5 may be a relay, a contactor, an IGBT, a BJT or a MOS tube.

[0108] It should be noted that the controller 101 may be connected to the fifth switch K5, and is used to control the first switch K1 and the fifth switch K5 to be closed when it is determined that the first charging interface 104 is connected to the first charging device, so that the first charging device charges the battery pack 102, and to control the first switch K1 and the fifth switch K5 to be disconnected when it is determined that the battery pack 102 is fully charged, so that the first charging device stops charging the battery pack 102. Whether the battery pack 102 is fully charged can be determined by collecting the voltage, charging current or power of the battery pack 102.

[0109] Optionally, Fig.15As shown, the charging circuit may further include: a sixth switch K6, a seventh switch K7 and a second capacitor C2; the first end of the sixth switch K6 may be connected to the midpoint of the second bridge arm through the second inductive element L2, and the second end of the sixth switch K6 may be connected to the first end of the second capacitor C2 and the first end of the second charging interface 105; the first end of the seventh switch K7 may be connected to the second end of the second charging interface 105, and the second end of the seventh switch K7 may be connected to the second end of the second capacitor C2 and the second end of the second bridge arm.

[0110] The sixth switch K6 and the seventh switch K7 may be relays, contactors, IGBTs, BJTs or MOS tubes, etc.

[0111] It should be noted that the controller 101 can be connected to the sixth switch K6 and the seventh switch K7, and is used to control the sixth switch K6 and the seventh switch K7 to close when it is determined that the second charging interface 105 is connected to the second charging device, so that the second charging device charges the battery pack 102, and when it is determined that the charging of the battery pack 102 is completed, control the first switch K1 and the fifth switch K5 to disconnect, so that the second charging device stops charging the battery pack 102.

[0112] Optionally, the charging circuit may include: a third inductive element and a third heating switch, and the electric control component 103 may also include a third bridge arm; the first end of the third inductive element may be connected to the midpoint of the third bridge arm, the second end of the third inductive element may be connected to the first end of the third heating switch, and the second end of the third heating switch may be connected to the negative electrode of the first battery pack 1021 and the positive electrode of the second battery pack 1022; the first end of the third bridge arm may be connected to the first end of the first bridge arm, and the second end of the third bridge arm may be connected to the second end of the first bridge arm; the controller 101 may be connected to the third bridge arm , which is used to control the third heating switch to close, and the upper bridge arm and the lower bridge arm of the third bridge arm to be alternately turned on, so that the third inductive element is alternately charged and discharged, so that the first charging device can boost the charging state of the battery pack 102 through the first inductive element L1, and / or the second charging device can boost the charging state of the battery pack 102 through the second inductive element L2, if it is determined that the current temperature of the battery pack 102 is less than a preset temperature threshold when it is determined that the first charging interface 104 is connected to the first charging device and / or the second charging interface 105 is connected to the second charging device, and the battery pack 102 is heated.

[0113] The third inductive element may be an inductor, or a transformer, a motor, a speaker, a relay or a contactor, etc. The third heating switch may be a relay, a contactor, an IGBT, a BJT or a MOS tube, etc.

[0114] It should be noted that, by separately setting the third inductive element and the third heating switch and reusing the third bridge arm of the electric control component 103, the battery pack 102 can be heated during the charging process of the battery pack 102, thereby improving the charging efficiency of the battery pack 102. When the controller determines that the first charging interface 104 is connected to the first charging device and / or the second charging interface 105 is connected to the second charging device, if it is determined that the current temperature of the battery pack 102 is less than the preset temperature threshold, the third heating switch is controlled to close, and the upper bridge arm and the lower bridge arm of the third bridge arm are controlled to be alternately turned on according to the second preset frequency, so that the third inductive element is alternately charged and discharged, so that the battery pack 102 is boosted and charged and heated at the same time.

[0115] The above technical scheme can realize independent control of the two charging circuits by setting a first charging interface and a second charging interface, reusing the electronic control component, connecting to the battery pack through the electronic control component, and controlling the electronic control component through a controller according to the connection status of the first charging interface and the second charging interface with the charging device. It can flexibly switch between a single charging circuit and two charging circuits, so that the battery pack can be charged separately through one charging circuit, or the battery pack can be charged simultaneously through two charging circuits. This can not only effectively ensure the charging reliability, but also effectively improve the charging efficiency of the vehicle when charging through two charging circuits.

[0116] Fig.17 is a block diagram of a vehicle according to an exemplary embodiment of the present disclosure, such as Fig.17 As shown, the vehicle includes: Figure 1-Figure 16 Any charging circuit provided.

[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 circuit, characterized in that: The charging circuit includes: a controller, a battery pack, an electronic control component, a first charging interface and a second charging interface, wherein the first charging interface is used to connect to a first charging device, and the second charging interface is used to connect to a second charging device; The electric control assembly is connected to the battery pack, the first charging interface and the second charging interface; The controller is connected to the first charging interface, the second charging interface and the electronic control component, and is used to control the first charging interface and / or the second charging interface to form a charging path with the battery pack through the electronic control component when it is determined that the first charging interface is connected to the first charging device and / or the second charging interface is connected to the second charging device; The charging circuit further comprises: a first inductive element, and the electric control component comprises a first bridge arm; The first end of the first bridge arm is connected to the first end of the battery pack, the midpoint of the first bridge arm is connected to the first end of the first charging interface through the first inductive element, and the second end of the first bridge arm is connected to the second end of the battery pack, the second end of the first charging interface, and the second end of the second charging interface; The charging circuit further comprises: a first heating switch, the battery pack comprises a first battery pack and a second battery pack connected in series; A first end of the first heating switch is connected to a first end of the first charging interface, and a second end of the first heating switch is connected to a negative electrode of the first battery pack and a positive electrode of the second battery pack; The controller is further connected to the first heating switch, and is used to control the first heating switch to close when it is determined that the second charging interface is connected to the second charging device and when it is determined that the current temperature of the battery pack is less than a preset temperature threshold, so that the upper bridge arm and the lower bridge arm of the first bridge arm are alternately turned on, so that the first inductive element is alternately charged and discharged, so as to heat the battery pack; The charging circuit further includes: a charging switch and a first switch; The first end of the charging switch is connected to the first end of the battery pack, and the second end of the charging switch is connected to the first end of the first charging interface and the first end of the first switch; The second end of the first switch is connected to the first end of the first heating switch; The controller is also connected to the charging switch and the first switch, and is used to control the charging switch and the first heating switch to close and the first switch to open, so that the battery pack can be heated while in a charging state, when it is determined that the first charging interface is connected to the first charging device and the second charging interface is connected to the second charging device, and if it is determined that the current temperature of the battery pack is less than a preset temperature threshold.

2. The charging circuit according to claim 1, characterized in that: The input end of the electronic control component is connected to the first charging interface and the second charging interface, and the output end of the electronic control component is connected to the battery pack.

3. The charging circuit according to claim 2, characterized in that: The input end of the electric control component includes a first input end and a second input end. The first input end is connected to the first end of the first charging interface; The second input end is connected to the first end of the second charging interface; The first output end of the electronic control component is connected to the first end of the battery pack, and the second output end of the electronic control component is connected to the second end of the battery pack, the second end of the first charging interface, and the second end of the second charging interface.

4. The charging circuit according to claim 1, characterized in that: The controller is connected to the first bridge arm, and is used to control the upper bridge arm and the lower bridge arm of the first bridge arm to be alternately turned on when it is determined that the first charging interface is connected to the first charging device, so that the first inductive element is alternately charged and discharged, so that the first charging device can boost and charge the battery pack.

5. The charging circuit according to claim 1, characterized in that: The charging circuit further includes: a second inductive element, and the electric control component further includes a second bridge arm; The first end of the second bridge arm is connected to the first end of the first bridge arm, the midpoint of the second bridge arm is connected to the first end of the second charging interface through the second inductive element, and the second end of the second bridge arm is connected to the second end of the first bridge arm.

6. The charging circuit according to claim 5, characterized in that: The controller is further connected to the second bridge arm, and is used to control the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on when it is determined that the second charging interface is connected to the second charging device, so that the second inductive element is alternately charged and discharged, so that the second charging device boosts and charges the battery pack; The controller is also used to control the upper bridge arm and the lower bridge arm of the first bridge arm and the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on when it is determined that the first charging interface is connected to the first charging device and the second charging interface is connected to the second charging device, so that the first inductive element and the second inductive element are alternately charged and discharged, so that the first charging device and the second charging device can boost and charge the battery pack.

7. The charging circuit according to claim 5, characterized in that: The charging circuit further includes: a second heating switch; The first end of the second heating switch is connected to the midpoint of the second bridge arm through the second inductive element, and the second end of the second heating switch is connected to the second end of the first heating switch.

8. The charging circuit according to claim 7, characterized in that: The controller is also connected to the second heating switch, and is used to control the second heating switch to close, and the upper bridge arm and the lower bridge arm of the second bridge arm to be alternately turned on, so that the second inductive element is alternately charged and discharged, so as to heat the battery pack, when it is determined that the first charging interface is connected to the first charging device and the current temperature of the battery pack is less than the preset temperature threshold.

9. The charging circuit according to claim 1, characterized in that: The charging circuit further includes: a second switch, a third switch, a fourth switch and a resistor; One end of the second switch connected in series with the resistor is connected to the first end of the third switch and the first end of the battery pack, and the other end is connected to the second end of the third switch and the first end of the first bridge arm; A first end of the fourth switch is connected to a second end of the battery pack, and a second end of the fourth switch is connected to a second end of the first charging interface.

10. The charging circuit according to claim 9, characterized in that: The charging circuit further includes: a fifth switch and a first capacitor; A first end of the fifth switch is connected to a second end of the first charging interface, and a second end of the fifth switch is connected to a first end of the first capacitor and a second end of the first bridge arm; The second end of the first capacitor is connected to the first end of the first switch and the first end of the first charging interface.

11. The charging circuit according to claim 5, characterized in that: The charging circuit further includes: a sixth switch, a seventh switch and a second capacitor; The first end of the sixth switch is connected to the midpoint of the second bridge arm through the second inductive element, and the second end of the sixth switch is connected to the first end of the second capacitor and the first end of the second charging interface; The first end of the seventh switch is connected to the second end of the second charging interface, and the second end of the seventh switch is connected to the second end of the second capacitor and the second end of the second bridge arm.

12. The charging circuit according to claim 5, characterized in that: The charging circuit includes: a third inductive element and a third heating switch, and the electric control component also includes a third bridge arm; The first end of the third inductive element is connected to the midpoint of the third bridge arm, the second end of the third inductive element is connected to the first end of the third heating switch, and the second end of the third heating switch is connected to the negative electrode of the first battery pack and the positive electrode of the second battery pack; The first end of the third bridge arm is connected to the first end of the first bridge arm, and the second end of the third bridge arm is connected to the second end of the first bridge arm.

13. The charging circuit according to claim 12, characterized in that: The controller is connected to the third bridge arm, and is used to control the third heating switch to close, and the upper bridge arm and the lower bridge arm of the third bridge arm to be alternately turned on, so that the third inductive element is alternately charged and discharged, so that the battery pack is heated when the first charging device boosts the charging state of the battery pack through the first inductive element, and / or the second charging device boosts the charging state of the battery pack through the second inductive element, if it is determined that the current temperature of the battery pack is less than a preset temperature threshold.

14. A vehicle, characterized in that: The vehicle comprises: a charging circuit as described in any one of claims 1 to 13 above.

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