Charging heating circuit, method, system and vehicle

Abstract

The present application relates to a charging and heating circuit, method, system, and vehicle, and relates to the field of battery technology, and at least solves the technical problem that the battery heating scenario in the related art is limited. The method includes: obtaining the current state information of the battery; based on the current state information, preset charging conditions, and preset heating conditions, obtaining state requirement information, the preset charging conditions are used to indicate whether the battery currently needs to be charged, the preset heating conditions are used to indicate whether the battery currently needs to be heated, and the state requirement information is used to indicate whether the battery needs to be charged and whether it needs to be heated; when the state requirement information indicates that the battery needs to be heated while charging, a first control instruction is issued, and the first control instruction is used to control the first switch unit and the second switch unit in the charging and heating circuit to be turned on; in this way, the battery can be heated while charging.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a charging heating circuit, method, system and vehicle. Background Art

[0002] With the rapid growth of the new energy vehicle market, users are increasingly demanding the environmental adaptability of electric vehicles. However, in low-temperature environments, the low-temperature performance of batteries is limited, which affects the user experience.

[0003] One prior art provides a battery heating method that detects the current battery temperature and cyclically controls the pulse frequency and discharge duty cycle to generate a pulse-width modulated signal to heat the battery. Another prior art provides a battery heating method that sets pulse heating entry conditions. When these conditions are met, the motor system enters a pulse heating mode to provide pulse heating to the battery.

[0004] The above method can rapidly heat batteries in low-temperature environments through pulse heating, improving battery performance. However, this method has limitations in battery heating scenarios. Therefore, a new method for heating batteries is needed. Summary of the Invention

[0005] One of the purposes of the present application is to provide a charging heating circuit, method, system and vehicle to at least solve the technical problem that battery heating scenarios in related technologies are limited.

[0006] In a first aspect, the present invention provides a charging heating circuit. The charging heating circuit includes: a battery. A power module, wherein the first end of the power module is connected to the first pole of the battery, and the second end of the power module is connected to the second pole of the battery. A motor is connected to the third end of the power module. A charging port is connected between the first pole of the battery and the second pole of the battery. The charging port is used to access a charging device. A first switch unit is connected between the battery and the power module. A second switch unit and an isolation unit are connected in series between the battery and the charging port. When the battery needs to be heated while charging, the second switch unit is configured to be turned on so that the battery and the charging device form a charging circuit. Furthermore, the first switch unit is configured to be turned on so that the battery, the power module and the motor form a heating circuit. The isolation unit allows current to flow from the charging port to the battery and blocks current from flowing from the battery to the charging port.

[0007] In one possible embodiment, the isolation unit includes a diode, with the anode of the diode connected to the charging port and the cathode of the diode connected to the battery. The isolation unit is connected between the charging port and the second switch unit. Alternatively, the isolation unit is connected between the battery and the second switch unit.

[0008] In one possible approach, when the battery needs to be charged without heating, the second switch unit is configured to be turned on, so that the battery and the charging device form a charging circuit. The first switch unit is configured to be turned off. When the battery needs to be heated without charging, the first switch unit is configured to be turned on, so that the battery, power module, and motor form a heating circuit. The second switch unit is configured to be turned off.

[0009] In one possible embodiment, the charging and heating circuit further includes a third switch unit connected in parallel with the isolation unit. The third switch unit is configured to be turned on when the battery is only charged but not heated.

[0010] In one possible embodiment, the first switch unit is connected between the first pole of the battery and the first end of the power module, and the second switch unit and the isolation unit are connected between the first pole of the battery and the charging port.

[0011] In one possible embodiment, the power module includes three parallel-connected bridge arms, and the motor includes three-phase coils. The first ends of the three-phase bridge arms are each connected to the first terminal of the battery, and the second ends of the three-phase bridge arms are connected to the second terminal of the battery. The midpoints of the three-phase bridge arms are respectively connected to the first ends of the three-phase coils, with the midpoints of the bridge arms being the connection points between the upper and lower bridge arms. The three-phase bridge arms include a first arm, a second arm, and a third arm, and the three-phase coils include a first coil, a second coil, and a third coil. To simultaneously charge and heat the battery, in a first phase, the upper arm of the first and / or second bridge arm, and the lower arm of the third bridge arm are forward-conducting, and current from the charging port charges the first coil, the second coil, and the third coil. Forward conduction refers to current flow from the first end of the bridge arm to the midpoint of the bridge arm. In a second phase, the lower arm of the first and / or second bridge arm, and the upper arm of the third bridge arm are reverse-conducting, and the first coil, the second coil, and the third coil discharge electricity to the battery. Reverse conduction is conduction from the second end of the bridge arm to the midpoint of the bridge arm.

[0012] In a possible manner, the third switch unit is configured to be turned on in the first phase and turned off in the second phase.

[0013] In a second aspect, the present application provides a charging and heating method, which is applied to the charging and heating circuit of the first aspect. The method includes: obtaining the current status information of the battery. Based on the current status information, preset charging conditions and preset heating conditions, status requirement information is obtained, the preset charging conditions are used to indicate whether the battery currently needs to be charged, the preset heating conditions are used to indicate whether the battery currently needs to be heated, and the status requirement information is used to indicate whether the battery needs to be charged and whether it needs to be heated. When the status requirement information indicates that the battery needs to be heated while charging, a first control instruction is issued, and the first control instruction is used to control the first switch unit and the second switch unit in the charging and heating circuit to be turned on.

[0014] In one possible approach, when the state requirement information indicates that the battery requires only charging without heating, a second control instruction is issued, the second control instruction being used to control the first switch unit to be disconnected and the second switch unit to be connected. When the state requirement information indicates that the battery requires only heating without charging, a third control instruction is issued, the third control instruction being used to control the first switch unit to be connected and the second switch unit to be disconnected.

[0015] In one possible embodiment, the first control instruction further includes a first required charging power for indicating battery charging and a first required heating temperature for indicating battery heating. The second control instruction further includes a second required charging power for indicating battery charging. The third control instruction further includes a second required heating temperature for indicating battery heating.

[0016] In a third aspect, the present application provides a charging and heating system comprising: a charging and heating circuit as described in the first aspect and a battery management module; wherein the battery management module is connected to a first switch unit and a second switch unit of the charging and heating circuit, and is configured to control the first switch unit and the second switch unit to be turned on or off based on the current battery demand. The current battery demand includes: charging and heating, charging without heating, and heating without charging.

[0017] In one possible embodiment, the charging and heating circuit further includes a motor control unit connected to the three-phase bridge arm of the power module, and configured to control the switching states of the upper bridge arm and the lower bridge arm of the three-phase bridge arm.

[0018] In a fourth aspect, the present application provides a vehicle, comprising the charging and heating system according to the third aspect, and configured to implement the method according to the second aspect and any possible implementation thereof.

[0019] In a fifth aspect, the present application provides a charging and heating device, comprising: a processor; and a memory for storing processor-executable instructions; wherein the processor is configured to execute instructions to implement a method as in the second aspect and any possible implementation method thereof.

[0020] In a sixth aspect, the present application provides a computer-readable storage medium. When the instructions in the computer-readable storage medium are executed by a processor of a charging and heating device, the charging and heating device can perform the method of the second aspect and any possible implementation method thereof.

[0021] In a seventh aspect, the present application provides a computer program product, which includes computer instructions. When the computer instructions are run on a charging and heating device, the charging and heating device implements the method of the second aspect and any possible implementation method thereof.

[0022] Therefore, the above technical features of this application have the following beneficial effects:

[0023] (1) After the second switch unit K2 is turned on, the charging device can directly charge the battery through the charging port. After the first switch unit K1 is turned on, the power module realizes battery heating. The isolation unit D can make the charging current flow into the battery in one direction, blocking the battery from discharging in the opposite direction to the charging device, avoiding energy backflow and causing damage to the device, thereby improving system reliability. In this way, users do not need to wait for the battery to heat up, and charging and heating can be carried out simultaneously, shortening the waiting time.

[0024] (2) When the battery is charged by a charging device connected in series with the charging port, the isolation unit D can prevent the current in the heating circuit from flowing into the charging device through the closed second switch unit K2. Since the diode has unidirectional conductivity, it allows current to flow in one direction while being almost non-conductive in the other direction. This can prevent the current in the heating circuit from flowing into the charging device and causing damage to the charging device.

[0025] (3) When the battery only needs to be charged without being heated, the current can be used to charge the battery through the second switch unit K2. When the battery only needs to be heated without being charged, the current can be used to heat the battery through the first switch unit K1.

[0026] (4) When the battery is only charged and not heated, the third switch unit K3 is turned on, so that the current does not need to pass through the isolation unit D and flows directly through the third switch unit K3 to charge the battery. In this way, the current power of the battery charging can be increased, thereby speeding up the battery charging speed.

[0027] (5) The first switch unit K1, the second switch unit K2, and the isolation unit D are integrated together to facilitate control by the battery management system. Furthermore, by controlling the conduction or disconnection of the second switch unit K2, the battery charging circuit can be controlled to be on or off, thereby controlling the charging of the battery. The isolation unit D can prevent the battery from reversely discharging to the charging terminal when the battery is heated and charged, thereby protecting the battery from damage.

[0028] (6) The charging and heating circuit, which is composed of the battery, power module, motor, charging port, first switch unit K1, second switch unit K2, and isolation unit D, can achieve simultaneous heating and charging of the battery. When it is necessary to charge and heat the battery simultaneously, the three-phase bridge arm can be controlled by the first and second stages to achieve pulse heating of the battery.

[0029] (7) The third switch unit K3 is turned on in the first stage and turned off in the second stage, so that the current does not flow into the charging device, and the power of the current can be increased. While speeding up the battery charging speed, it can also avoid causing damage to the charging device.

[0030] (8) By obtaining the current state information, preset charging conditions, and preset heating conditions of the battery, the state requirement information of the battery can be determined, thereby determining whether the battery requires charging and heating. In the case where the state requirement information indicates that the battery requires charging and heating at the same time, a first control instruction can be issued to control the first switch unit and the second switch unit in the charging and heating circuit to be turned on, thereby achieving simultaneous charging and heating of the battery. In this way, the charging and heating requirements of the battery can be met at the same time, reducing the time required for the battery to reach the working state, thereby improving the starting efficiency.

[0031] (9) The first switch unit and the second switch unit can be controlled to be turned on or off by the second control instruction and thereby realize charging without heating the battery or heating without charging the battery. In this way, the battery can be heated or charged according to the current charging and heating requirements of the battery according to the battery status requirement information, thereby ensuring that the battery is in a normal working environment and thus extending the battery life.

[0032] (10) By obtaining the first charging power requirement and the first heating temperature requirement, the actual tolerable charging power and target heating temperature under the current state can be accurately determined, thereby preventing the battery from overcharging or overheating when charging and heating are required. The second charging power requirement can accurately determine the actual tolerable charging power of the battery when charging without heating is required, and the second heating temperature requirement can accurately control the battery to reach an appropriate temperature when heating without charging is required. This prevents the battery from overcharging when charging without heating is required, and from overheating when heating without charging, thereby ensuring the safety of the battery.

[0033] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application, and do not constitute an improper limitation on the present application.

[0035] Figure 1 is a schematic diagram showing an example of a charging heating circuit according to an exemplary embodiment;

[0036] Figure 2 is a schematic diagram showing another example of a charging heating circuit according to an exemplary embodiment;

[0037] Figure 3 is a schematic diagram showing another example of a charging heating circuit according to an exemplary embodiment;

[0038] Figure 4 is a schematic diagram showing another example of a charging heating circuit according to an exemplary embodiment;

[0039] Figure 5 is a schematic diagram showing another example of a charging heating circuit according to an exemplary embodiment;

[0040] Figure 6 is a flow chart showing a charging heating method according to an exemplary embodiment;

[0041] Figure 7 is a schematic structural diagram of a charging and heating device according to an exemplary embodiment;

[0042] Figure 8 It is a schematic structural diagram of another charging and heating device according to an exemplary embodiment.

[0043] Reference numerals:

[0044] D. Isolation unit;

[0045] K1, first switch unit; K2, second switch unit; K3, third switch unit;

[0046] C. Capacitor;

[0047] S1, first upper bridge arm transistor; S2, second upper bridge arm transistor; S3, third upper bridge arm transistor; S4, first lower bridge arm transistor; S5, second lower bridge arm transistor; S6, third lower bridge arm transistor;

[0048] D1, first upper bridge arm diode; D2, second upper bridge arm diode; D3, third upper bridge arm diode; D4, first lower bridge arm diode; D5, second lower bridge arm diode; D6, third lower bridge arm diode;

[0049] L1, first coil; L2, second coil; L3, third coil. DETAILED DESCRIPTION

[0050] In order to enable ordinary people in the art to better understand the technical solutions of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0051] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

[0052] In an exemplary embodiment, an embodiment of the present application provides a vehicle including a charging and heating system. The vehicle can perform the method in the above embodiment through the charging and heating system.

[0053] In some embodiments, the charging heating system includes: a charging heating circuit.

[0054] In the embodiments of this application, Figure 1 As shown, the charging and heating circuit includes: a battery, a power module, a motor, a charging port, a first switch unit K1, a second switch unit K2 and an isolation unit D.

[0055] The first terminal of the power module is connected to the first terminal of the battery, and the second terminal of the power module is connected to the second terminal of the battery. The motor is connected to the third terminal of the power module. The charging port is connected between the first and second terminals of the battery and is used to connect to a charging device. The first switch unit K1 is connected between the battery and the power module, and the second switch unit K2 and the isolation unit D are connected in series between the battery and the charging port.

[0056] Optionally, the first switch unit K1 is connected between the first pole of the battery and the first end of the power module, and the second switch unit K2 and the isolation unit D are connected between the first pole of the battery and the charging port.

[0057] In one possible design, Figure 1 As shown, the second switch unit (K2), the isolation unit and the first switch unit (K1) are connected in series between the battery and the charging port.

[0058] It can be understood that the first switch unit K1, the second switch unit K2, and the isolation unit D are integrated together to facilitate control by the battery management system. Furthermore, by controlling the conduction or disconnection of the second switch unit K2, the battery charging circuit can be controlled to be connected or disconnected, thereby controlling the battery charging. The isolation unit D can prevent the battery from reverse discharge to the charging port when charging while heating the battery, thereby protecting the battery from damage.

[0059] For example, the first switch unit K1 and the second switch unit K2 may be relays. The first switch unit K1 may be a main relay for controlling battery heating, and the second switch unit K2 may be a fast charge relay for controlling battery charging.

[0060] Specifically, the isolation unit D is connected between the charging port and the second switch unit K2 , or between the battery and the second switch unit K2 .

[0061] It should be noted that the isolation unit D is a component for preventing backflow, and the present application does not limit the isolation unit D. For example, the isolation unit D may be a unidirectional thyristor, a diode, or a component including a diode.

[0062] Optionally, the isolation unit D includes a diode, the anode of the diode is connected to the charging port, and the cathode of the diode is connected to the battery.

[0063] It should be noted that conventional technology does not consider the case where no isolation unit is provided and the first switch unit K1 and the second switch unit K2 of the battery are connected in series. If the battery is heated and charged at the same time, and the first switch unit K1 and the second switch unit K2 are turned on, then during the process of the power module charging the battery, current will flow through the first switch unit K1 and the second switch unit K2, and flow into the charging device through the charging port, causing damage to the battery and the charging device.

[0064] It is understood that when current flows through the charging device connected in series with the charging port to charge the battery, and current flows through the power module to charge the battery, the isolation unit D can prevent the current in the heating circuit from flowing into the charging device through the closed second switch unit K2. Furthermore, because the diode has unidirectional conductivity, allowing current to flow in one direction while being almost non-conductive in the other, the current from the charging port can flow into the battery while the heating circuit is heating the battery, preventing the current from the heating circuit from flowing into the charging device and causing damage to the charging device.

[0065] In some embodiments, as Figure 1 As shown, the charging and heating circuit also includes a motor controller. The motor controller includes a capacitor C and a motor control unit (MCU). The first end of capacitor C is connected between the first switch unit K1 and the first end of the power module, and the second end of capacitor C is connected between the second terminal of the battery and the second end of the power module.

[0066] In an embodiment of the present application, the power module includes multi-phase bridge arms connected in parallel, and the motor includes multi-phase coils.

[0067] For example, Figure 1As shown, the power module includes three-phase bridge arms connected in parallel, and the motor includes three-phase coils. The MCU is connected to the three-phase bridge arms of the power module to control the switching states of the upper and lower bridge arms of the three-phase bridge arms.

[0068] Among them, the first ends of the three-phase bridge arms are connected to the first pole of the battery, the second ends of the three-phase bridge arms are connected to the second pole of the battery, the midpoints of the three-phase bridge arms are respectively connected to the first ends of the three-phase coils, and the second ends of the three-phase coils are connected to the second end of the motor.

[0069] The midpoint of the bridge arm is the connection point between the upper bridge arm and the lower bridge arm.

[0070] Exemplarily, the upper arm of the bridge arm may include a Metal-Oxide-Semiconductor Field-Effect Transistor (MOS), or the upper arm of the bridge arm may also include a transistor and a diode connected in parallel.

[0071] It should be noted that, for the introduction of the lower bridge arm of the bridge arm, reference can be made to the introduction of the upper bridge arm of the bridge arm, and this application will not elaborate on this.

[0072] In the case where the upper bridge arm of the bridge arm includes a MOS tube and the lower bridge arm of the bridge arm includes a MOS tube, the first pole of the MOS tube included in the upper bridge arm of the bridge arm is connected to the first pole of the battery, the second pole of the MOS tube included in the upper bridge arm of the bridge arm is connected to the first pole of the MOS tube included in the lower bridge arm of the bridge arm, and the first pole of the MOS tube included in the lower bridge arm of the bridge arm is connected to the second pole of the battery.

[0073] In the case where the upper arm of the bridge arm includes a transistor and a diode connected in parallel, the first end of the diode of the upper arm of the bridge arm is electrically connected to the second end of the transistor of the upper arm of the bridge arm, the second end of the diode of the upper arm of the bridge arm is electrically connected to the first end of the transistor of the upper arm of the bridge arm, the second end of the diode of the upper arm of the bridge arm and the first end of the transistor of the upper arm of the bridge arm are both electrically connected to the midpoint of the bridge arm, and the first end of the diode of the upper arm of the bridge arm and the second end of the transistor of the upper arm of the bridge arm are both electrically connected to the first terminal of the battery. The first end of the diode of the lower arm of the bridge arm is electrically connected to the second end of the transistor of the lower arm of the bridge arm, the second end of the diode of the lower arm of the bridge arm is electrically connected to the first end of the transistor of the lower arm of the bridge arm, the first end of the diode of the lower arm of the bridge arm and the second end of the transistor of the lower arm of the bridge arm are both electrically connected to the midpoint of the bridge arm, and the second end of the diode of the lower arm of the bridge arm and the first end of the transistor of the lower arm of the bridge arm are both electrically connected to the second terminal of the battery.

[0074] Optionally, the three-phase bridge arm includes a first bridge arm, a second bridge arm and a third bridge arm, and the three-phase coil includes a first coil L1, a second coil L2 and a third coil L3.

[0075] It should be noted that the number of phases of the power module is the same as the number of phases of the motor, and the lead wire between the upper bridge arm and the lower bridge arm of each phase (i.e., the midpoint of the bridge arm) is connected to the corresponding phase of the motor stator winding (i.e., the three-phase coil).

[0076] For example, Figure 1 As shown, the first bridge arm includes: a first upper bridge arm and a first lower bridge arm, the second bridge arm includes: a second upper bridge arm and a second lower bridge arm, and the third bridge arm includes: a third upper bridge arm and a third lower bridge arm.

[0077] The first upper arm includes: a first upper arm transistor S1 and a first upper arm diode D1. The first end of the first upper arm diode D1 is electrically connected to the second end of the first upper arm transistor S1, the second end of the first upper arm diode D1 is electrically connected to the first end of the first upper arm transistor S1, the second end of the first upper arm diode D1 and the first end of the first upper arm transistor S1 are both electrically connected to the first coil L1, and the first end of the first upper arm diode D1 and the second end of the first upper arm transistor S1 are both electrically connected to the first terminal of the battery. The first end of the first lower arm diode D4 is electrically connected to the second end of the first lower arm transistor S4, the second end of the first lower arm diode D4 is electrically connected to the first end of the first lower arm transistor S4, the first end of the first lower arm diode D4 and the second end of the first lower arm transistor S4 are both electrically connected to the first coil L1, and the second end of the first lower arm diode D4 and the first end of the first lower arm transistor S4 are both electrically connected to the second terminal of the battery.

[0078] The second upper arm includes: a second upper arm transistor S2 and a second upper arm diode D2. The first end of the second upper arm diode D2 is electrically connected to the second end of the second upper arm transistor S2, the second end of the second upper arm diode D2 is electrically connected to the first end of the second upper arm transistor S2, the second end of the second upper arm diode D2 and the first end of the second upper arm transistor S2 are both electrically connected to the second coil L2, and the first end of the second upper arm diode D2 and the second end of the second upper arm transistor S2 are both electrically connected to the first terminal of the battery. The first end of the second lower arm diode D5 is electrically connected to the second end of the second lower arm transistor S5, the second end of the second lower arm diode D5 is electrically connected to the first end of the second lower arm transistor S5, the first end of the second lower arm diode D5 and the second end of the second lower arm transistor S5 are both electrically connected to the second coil L2, and the second end of the second lower arm diode D5 and the first end of the second lower arm transistor S5 are both electrically connected to the second terminal of the battery.

[0079] The third upper arm includes: a third upper arm transistor S3 and a third upper arm diode D3. The first end of the third upper arm diode D3 is electrically connected to the second end of the third upper arm transistor S3, the second end of the third upper arm diode D3 is electrically connected to the first end of the third upper arm transistor S3, the second end of the third upper arm diode D3 and the first end of the third upper arm transistor S3 are both electrically connected to the third coil L3, and the first end of the third upper arm diode D3 and the second end of the third upper arm transistor S3 are both electrically connected to the first terminal of the battery. The first end of the third lower arm diode D6 is electrically connected to the second end of the third lower arm transistor S6, the second end of the third lower arm diode D6 is electrically connected to the first end of the third lower arm transistor S6, the first end of the third lower arm diode D6 and the second end of the third lower arm transistor S6 are both electrically connected to the third coil L3, and the second end of the third lower arm diode D6 and the first end of the third lower arm transistor S6 are both electrically connected to the second terminal of the battery.

[0080] In some embodiments, as Figure 1 As shown, the charging and heating system further includes: a battery management module (ie, a battery management system (BMS)).

[0081] The battery management module is connected to the first and second switch units K1 and K2 of the charging and heating circuit and is used to control the first and second switch units K1 and K2 to be turned on or off based on the current battery demand. The current battery demand includes: charging and heating, charging without heating, and heating without charging.

[0082] In one possible design, when simultaneous charging and heating of the battery is required, the second switch unit K2 is configured to be turned on, allowing the battery and the charger to form a charging circuit. Furthermore, the first switch unit K1 is configured to be turned on, allowing the battery, power module, and motor to form a heating circuit. The isolation unit D allows current to flow from the charging port to the battery, but blocks current from the battery to the charging port.

[0083] In this way, when the second switch unit K2 is turned on, the charging device can directly charge the battery through the charging port. When the first switch unit K1 is turned on, the power module heats the battery. The isolation unit D allows the charging current to flow unidirectionally into the battery, preventing reverse discharge from the battery to the charging device, preventing energy backflow and causing damage to the device, thereby improving system reliability. This way, users do not need to wait for the battery to heat up; charging and heating can proceed simultaneously, shortening waiting time.

[0084] It should be noted that, during the battery heating process, the charging heating circuit switches between a first stage and a second stage.

[0085] Optionally, if simultaneous charging and heating of the battery is desired, in the first phase, the battery management module controls the upper arm of the first bridge arm and / or the second bridge arm, and the lower arm of the third bridge arm, to conduct forward. Current from the charging port charges the first coil L1 and / or the second coil L2, and the third coil L3. Forward conduction occurs when current is conducted from the first end of the bridge arm to the midpoint of the bridge arm. In the second phase, the lower arm of the first bridge arm and / or the second bridge arm, and the upper arm of the third bridge arm, conduct reversely, discharging the first coil L1 and / or the second coil L2, and the third coil L3 to the battery. Reverse conduction occurs when current is conducted from the second end of the bridge arm to the midpoint of the bridge arm.

[0086] For example, Figure 2 As shown, the charging port is connected in series with the charging device. When the battery needs to be heated while charging, the second switch unit K2 is turned on, forming a charging circuit with the charging device, the charging port, the isolation unit D, the second switch element, and the battery. In the first phase, the first switch unit K1, the first upper-arm transistor S1, the second upper-arm transistor S2, and the third lower-arm transistor S6 are turned on, forming a first-phase heating circuit with the first switch unit K1, the first upper-arm transistor S1, the second upper-arm transistor S2, the first coil L1, the second coil L2, the third coil L3, the third lower-arm transistor S6, and the battery.

[0087] In this way, a portion of the current output by the charging device connected in series with the charging port flows through the second switch unit K2 and into the first electrode of the battery (i.e., the positive electrode) to charge the battery. The remaining current output by the charging device connected in series with the charging port flows through the first upper-arm transistor S1 and the first coil L1, and the second upper-arm transistor S2 and the second coil L2. All currents then converge at the third coil L3 and flow through the third lower-arm transistor S6 to charge the three-phase coils.

[0088] For example, Figure 3 As shown, the charging port is connected in series with the charging device. When the battery needs to be heated while charging, the second switch unit K2 is turned on, forming a charging circuit with the charging device, the charging port, the isolation unit D, the second switch element, and the battery. In the second phase, the first switch unit K1 is turned on, the first upper-arm transistor S1, the second upper-arm transistor S2, the third upper-arm transistor S3, the first lower-arm transistor S4, the second lower-arm transistor S5, and the third lower-arm transistor S6 are turned off, and the third coil L3, the third upper-arm diode D3, the first switch unit K1, the battery, the first lower-arm diode D4, the second lower-arm diode D5, the first coil L1, and the second coil L2 form a second-phase heating circuit.

[0089] In this way, all the current output by the charging device connected in series with the charging port flows into the battery to charge the battery. At the same time, the current stored in the three-phase coil can be released to charge the battery through the third upper bridge arm diode D3, the first lower bridge arm diode D4, and the second lower bridge arm diode D5.

[0090] In some embodiments, when the voltage of the three-phase coil is higher than the voltage of the charging device, the charging device is controlled to stop outputting.

[0091] For example, Figure 4 As shown, the second switch unit K2 is turned on, and the charging device connected in series with the charging port does not output current. In the second phase, the first switch unit K1 is turned on, the first upper-arm transistor S1, the second upper-arm transistor S2, the third upper-arm transistor S3, the first lower-arm transistor S4, the second lower-arm transistor S5, and the third lower-arm transistor S6 are turned off, and the third coil L3, the third upper-arm diode D3, the first switch unit K1, the battery, the first lower-arm diode D4, the second lower-arm diode D5, the first coil L1, and the second coil L2 form a second-phase heating circuit.

[0092] In this way, the charging device and battery can be protected.

[0093] It is understood that the charging and heating circuit, consisting of the battery, power module, motor, charging port, first switch unit K1, second switch unit K2, and isolation unit D, can achieve simultaneous heating and charging of the battery. If simultaneous charging and heating of the battery is required, pulse heating of the battery can be achieved by controlling the three-phase bridge arms in the first and second stages.

[0094] In another possible design, when the battery needs to be charged without heating, the second switch unit K2 is configured to be turned on, so that the battery and the charger form a charging circuit. The first switch unit K1 is configured to be turned off. When the battery needs to be heated without charging, the first switch unit K1 is configured to be turned on, so that the battery, power module, and motor form a heating circuit. The second switch unit K2 is configured to be turned off.

[0095] It is understandable that when the battery needs to be charged without being heated, the current can be charged by the second switch unit K2. When the battery needs to be heated without being charged, the current can be heated by the first switch unit K1.

[0096] In some embodiments, as Figure 5 As shown, the charging and heating circuit further includes a third switch unit K3 , and the third switch unit K3 is connected to the isolation unit D in parallel.

[0097] The battery management module is connected to the third switch unit K3 and is used to control the first switch unit K1 , the second switch unit K2 and the third switch unit K3 to be turned on or off based on the current demand of the battery.

[0098] Exemplarily, the third switch unit K3 is configured to be turned on when the battery is only charged without being heated.

[0099] It is understandable that when the battery is only charged and not heated, the third switch unit K3 is turned on, so that the current can flow directly through the third switch unit K3 to charge the battery without passing through the isolation unit D. In this way, the current power of the battery charging can be increased, thereby accelerating the battery charging speed.

[0100] Alternatively, the third switch unit K3 may be configured to be turned on in the first stage and turned off in the second stage.

[0101] It should be noted that the third switch unit K3 can be turned on when the battery is only charged without being heated; and when the third switch unit K3 is charged and heated at the same time, the third switch unit K3 can also be turned on in the first stage.

[0102] It is understood that turning on the third switch unit K3 in the first phase can increase the power of the current without the current flowing into the charging device, thereby accelerating the charging speed of the battery. Turning off the third switch unit K3 in the second phase can prevent the current from flowing into the charging device in the second phase and causing damage to the charging device.

[0103] On this basis, the present application provides a charging heating method, which is applied to the above-mentioned charging heating circuit, such as Figure 6 As shown, the charging heating method includes:

[0104] S601: Obtain current battery status information.

[0105] The current status information of the battery includes at least one of the following: the current temperature of the battery and the current power level of the battery.

[0106] In a possible implementation, the battery may be monitored in real time to obtain current status information of the battery.

[0107] S602 : Obtaining state requirement information based on current state information, preset charging conditions, and preset heating conditions.

[0108] The preset charging condition is used to indicate whether the battery currently needs to be charged, the preset heating condition is used to indicate whether the battery currently needs to be heated, and the status requirement information is used to indicate whether the battery needs to be charged and whether it needs to be heated.

[0109] It should be noted that this application does not limit the preset charging conditions. For example, the preset charging condition may be whether the charge-discharge circuit has completed pre-charging preparations. The completion of pre-charging preparations may be when the current battery charge is lower than a preset charge threshold, or when the charging device is connected to the charging port.

[0110] Optionally, the preset charging condition is: the current battery power is lower than a preset power threshold, and the preset heating condition is: the current battery temperature is lower than a preset temperature threshold.

[0111] In one possible implementation, when the current temperature of the battery is lower than a preset temperature threshold, and the current battery charge is lower than a preset charge threshold, status requirement information is obtained, and the status requirement information is used to indicate that the battery needs to be charged and heated. When the current temperature of the battery is higher than the preset temperature threshold, and the current battery charge is lower than the preset charge threshold, status requirement information is obtained, and the status requirement information is used to indicate that the battery needs to be charged. When the current temperature of the battery is lower than the preset temperature threshold, and the current battery charge is higher than the preset charge threshold, status requirement information is obtained, and the status requirement information is used to indicate that the battery needs to be heated. When the current temperature of the battery is higher than the preset temperature threshold, and the current battery charge is higher than the preset charge threshold, the current status information of the battery is obtained, and the status requirement information is used to indicate that the battery does not need to be charged or heated.

[0112] S603: When the state requirement information indicates that the battery needs to be heated while being charged, issue a first control instruction.

[0113] The first control instruction includes: a first charging power requirement when the battery is charged, and a first heating temperature requirement when the battery is heated. The first control instruction is used to control the first switch unit and the second switch unit in the charging and heating circuit to be turned on.

[0114] In this way, by obtaining the first charging requirement power and the first heating requirement temperature, the actual tolerable charging power and target heating temperature under the current state can be accurately determined, preventing the battery from overcharging or overheating when it needs to be charged and heated at the same time, thereby ensuring the safety of the battery.

[0115] In a possible implementation, when the status requirement information indicates that the battery needs to be heated while being charged, a battery management function may be started and a first control instruction may be issued.

[0116] Optionally, battery management functions include: pulse heating function and DC charging function.

[0117] It should be noted that the pulse heating function is used to control the battery to enter a heating state, thereby heating the battery; the DC charging function is used to control the battery to enter a charging state, thereby charging the battery.

[0118] In one possible design, the pulse heating function and the DC charging function can be started simultaneously, so that the battery can enter a state of pulse heating while charging.

[0119] It should be noted that, when the DC charging function is enabled, the output voltage and output current of the charging device may be requested based on the charging power requirement of the battery to control the charging power of the battery.

[0120] Based on the above technical solution, by obtaining the battery's current state information, preset charging conditions, and preset heating conditions, the battery's state requirement information can be determined, thereby determining whether the battery requires charging and heating. If the state requirement information indicates that the battery requires simultaneous charging and heating, a first control instruction can be issued to control the first and second switch units in the charging and heating circuit to be conductive, thereby achieving simultaneous charging and heating of the battery. In this way, the battery's charging and heating requirements can be met simultaneously, reducing the time required for the battery to reach an operating state, thereby improving startup efficiency.

[0121] In some embodiments, when the state requirement information indicates that the battery requires only charging without heating, a second control instruction is issued, the second control instruction being used to control the first switch unit to be disconnected and the second switch unit to be connected. When the state requirement information indicates that the battery requires only heating without charging, a third control instruction is issued, the third control instruction being used to control the first switch unit to be connected and the second switch unit to be disconnected.

[0122] Optionally, the second control instruction further includes a second charging requirement power for indicating battery charging. The third control instruction further includes a second heating requirement temperature for indicating battery heating.

[0123] In this way, the second required charging power can accurately determine the actual charging power the battery can withstand when charging without heating is required, and the second required heating temperature can accurately control the battery to reach the appropriate temperature when heating without charging is required. This prevents the battery from overcharging when charging without heating is required, and from overheating when heating without charging is required, thereby ensuring battery safety.

[0124] In one possible implementation, the pulse heating function may be activated to enter a pulse heating state. Thereafter, a second control instruction may be issued. The DC charging function may be activated to enter a DC charging state.

[0125] It should be understood that when the battery does not need to be heated or charged, the pulse heating function and the DC charging function may not be started.

[0126] It is understood that the second and third control instructions can be used to control the on / off switching of the first and second switch units, thereby enabling the battery to be charged without heating, or heated without charging. In this way, the battery's current charging and heating requirements can be determined based on the battery's status and requirement information, ensuring the battery operates in a normal operating environment and extending its lifespan.

[0127] In some embodiments, when the pulse heating function is started, the switching sequence and duty cycle of the power switch can be controlled based on the first control instruction to control the current and power of the pulse heating, thereby generating a high-frequency pulse current across the battery.

[0128] It should be noted that each cycle of generating high-frequency pulse current across the battery consists of a first phase and a second phase. In the first phase, the battery discharges, with current flowing from the battery into the three-phase coil to charge it. During this process, the MCU controls the motor using space vector pulse width modulation (SVPWM) technology. It controls the on / off sequence of the first, second, and third bridge arms with the goal of achieving zero motor torque, and controls the duty cycle of each power switch based on the effective current required for battery heating. In the second phase, the MCU controls the first, second, and third bridge arms to completely shut down, releasing the energy stored in the three-phase coil during the first phase to charge the battery. Alternating between the first and second phases produces the high-frequency pulse current required for battery pulse heating. The high-frequency pulse current then flows through the battery's internal resistance, generating a significant amount of heat, thereby achieving pulse heating of the battery. The frequency of the high-frequency pulse current can be adjusted based on the battery's needs.

[0129] It should be noted that the present application does not limit the conversion conditions for alternating between the first stage and the second stage. For example, the conversion condition may be: if the energy stored in the three-phase coil in the first stage is greater than or equal to the preset energy threshold, then the second stage is entered; if the energy stored in the three-phase coil in the second stage is less than or equal to the preset energy threshold, then the first stage is entered. For another example, the conversion condition may be: if the duration of the first stage is greater than or equal to the preset charging time threshold, then the second stage is entered; if the duration of the second stage is greater than or equal to the preset discharge time threshold, then the first stage is entered. For another example, the conversion condition may be: if the battery voltage in the first stage is greater than or equal to the preset charging voltage threshold, then the second stage is entered; if the battery voltage in the second stage is less than or equal to the preset discharge voltage threshold, then the first stage is entered.

[0130] In an embodiment of the present application, the motor control unit can control the on and off of each phase switch tube in the power module in response to the pulse heating instruction of the BMS to generate a pulse current at both ends of the battery, thereby performing pulse heating on the battery.

[0131] It should be noted that the MCU can control the current and power of pulse heating by controlling the switching sequence and duty cycle of the power switch.

[0132] In some embodiments, the current state of the battery can be monitored in real time via the BMS. Based on the current state information and preset charging conditions, if the current state information satisfies the preset charging conditions, a determination can be made as to whether the current state information satisfies the preset heating conditions. If the current state information satisfies the preset heating conditions, the battery enters a state of both charging and heating; if the current state information does not meet the preset heating conditions, the battery enters a state of only charging without heating. If the current state information does not meet the preset charging conditions, a determination can be made as to whether the current state information satisfies the preset heating conditions. If the current state information does meet the preset heating conditions, the battery enters a state of only heating without charging; if the current state information does not meet the preset heating conditions, the battery enters a state of only heating without charging.

[0133] The above mainly introduces the solution provided by the embodiment of the present application from the perspective of the method. In order to realize the above functions, the charging and heating device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should easily realize that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0134] In the embodiment of the present application, the functional modules of the charging and heating device can be divided according to the above method. For example, the charging and heating device can include functional modules corresponding to the functional divisions, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical functional division. In actual implementation, there may be other division methods.

[0135] Reference Figure 7 The charging and heating device includes an acquisition module 701 and a processing module 702 .

[0136] The acquisition module 701 is used to acquire the current status information of the battery.

[0137] Processing module 702 is configured to obtain state requirement information based on current state information, preset charging conditions, and preset heating conditions. The preset charging conditions indicate whether the battery currently requires charging, the preset heating conditions indicate whether the battery currently requires heating, and the state requirement information indicates whether the battery requires both charging and heating. Processing module 702 is further configured to issue a first control instruction, if the state requirement information indicates that the battery requires simultaneous charging and heating, to control both the first and second switch units in the charging and heating circuit to be conductive.

[0138] Regarding the apparatus in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

[0139] like Figure 8 As shown, the charging and heating device includes but is not limited to: a processor 801 and a memory 802 .

[0140] The memory 802 is used to store executable instructions of the processor 801. It is understandable that the processor 801 is configured to execute instructions to implement the charging heating method in the above embodiment.

[0141] It should be noted that those skilled in the art can understand that Figure 8 The charging heating device structure shown in the figure does not constitute a limitation on the charging heating device. The charging heating device may include Figure 8 More or fewer components may be shown, or certain components may be combined, or the components may be arranged differently.

[0142] The processor 801 is the control center of the charging and heating device. It uses various interfaces and lines to connect the various parts of the entire charging and heating device. By running or executing software programs and / or modules stored in the memory 802 and calling data stored in the memory 802, it performs various functions of the charging and heating device and processes data, thereby monitoring the charging and heating device as a whole. The processor 801 may include one or more processing units. Optionally, the processor 801 may integrate an application processor and a modem processor, wherein the application processor mainly processes the operating system, user interface, and application programs, etc., and the modem processor mainly processes wireless communications. It is understandable that the above-mentioned modem processor may not be integrated into the processor 801.

[0143] Memory 802 can be used to store software programs and various data. Memory 802 may primarily include a program storage area and a data storage area. The program storage area may store an operating system and application programs required by at least one functional module (such as a determination unit, a processing unit, etc.). Furthermore, memory 802 may include high-speed random access memory and non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0144] In an exemplary embodiment, a computer-readable storage medium including instructions is further provided, such as a memory 802 including instructions. The instructions can be executed by the processor 801 of the charging and heating device to implement the method in the above embodiment.

[0145] In actual implementation, Figure 7 The functions of the acquisition module 701 and the processing module 702 can be obtained by Figure 8 The processor 801 in the embodiment calls the computer program stored in the memory 802. The specific execution process can be referred to the description of the method part in the above embodiment, which will not be repeated here.

[0146] Optionally, the computer-readable storage medium may be a non-temporary computer-readable storage medium, for example, the non-temporary computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), a magnetic tape, a floppy disk, an optical data storage device, etc.

[0147] In an exemplary embodiment, the present application also provides a computer program product including one or more instructions, which can be executed by the processor 801 of the charging and heating device to implement the method in the above embodiment.

[0148] It should be noted that when the instructions in the above-mentioned computer-readable storage medium or one or more instructions in the computer program product are executed by the processor of the charging and heating device, the various processes of the above-mentioned method embodiment are implemented and the same technical effect as the above-mentioned method can be achieved. To avoid repetition, they will not be repeated here.

[0149] Through the description of the above implementation methods, technical personnel in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional modules is used as an example. In actual applications, the above-mentioned functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above.

[0150] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of modules or units is only a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0151] Units described as separate components may or may not be physically separate, and components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0152] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0153] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium. Based on this understanding, the technical solution of the embodiment of the present application, or the part that contributes to the existing technology, or all or part of the technical solution can be embodied in the form of a software product. The software product is stored in a storage medium and includes a number of instructions for causing a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or optical disk, etc. Various media that can store program code.

[0154] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or replacements within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A charging heating circuit, characterized in that: include: Battery; a power module, wherein a first end of the power module is connected to the first electrode of the battery, and a second end of the power module is connected to the second electrode of the battery; a motor connected to the third terminal of the power module; A charging port connected between the first pole of the battery and the second pole of the battery; the charging port is used to connect to a charging device; A first switch unit (K1) connected between the battery and the power module; a second switch unit (K2) and an isolation unit connected in series between the battery and the charging port; The first switch unit (K1) is connected in series between the battery and the power module; In the case where the battery needs to be heated while being charged, the second switch unit (K2) is configured to be turned on so that the battery and the charging device form a charging circuit; and the first switch unit (K1) is configured to be turned on so that the battery, the power module and the motor form a heating circuit; the isolation unit allows current to flow from the charging port to the battery and blocks current from flowing from the battery to the charging port; The motor includes a three-phase coil. When the battery needs to be charged and heated simultaneously, the three-phase coil is charged in a first stage. In a second stage, the three-phase coil can store current and discharge the stored current to the battery. The charging and heating circuit also includes a third switch unit (K3) connected in parallel with the isolation unit. The third switch unit (K3) is configured to be turned on in the first stage and turned off in the second stage.

2. The charging heating circuit according to claim 1, characterized in that: The isolation unit includes a diode, an anode of the diode is connected to the charging port, and a cathode of the diode is connected to the battery.

3. The charging heating circuit according to claim 1, characterized in that: The isolation unit is connected between the charging port and the second switch unit (K2); or, The isolation unit is connected between the battery and the second switch unit (K2).

4. The charging heating circuit according to claim 1, characterized in that: When the battery needs to be charged without being heated, the second switch unit (K2) is configured to be turned on so that the battery and the charging device form a charging circuit; and the first switch unit (K1) is configured to be turned off; When the battery needs to be heated but not charged, the first switch unit (K1) is configured to be turned on so that the battery, the power module and the motor form a heating circuit; and the second switch unit (K2) is configured to be turned off.

5. The charging heating circuit according to claim 4, characterized in that: The third switch unit (K3) is configured to be turned on when the battery is only charged without being heated.

6. The charging heating circuit according to any one of claims 1 to 5, characterized in that: The first switch unit (K1) is connected between the first pole of the battery and the first end of the power module; The second switch unit (K2) and the isolation unit are connected between the first pole of the battery and the charging port.

7. The charging heating circuit according to claim 5, characterized in that: The power module includes three-phase bridge arms connected in parallel, and the motor includes a three-phase coil; a first end of the three-phase bridge arm is connected to a first pole of the battery, a second end of the three-phase bridge arm is connected to a second pole of the battery, and a midpoint of the three-phase bridge arm is connected to the first end of the three-phase coil respectively, and the midpoint of the bridge arm is the connection point of the upper bridge arm and the lower bridge arm of the bridge arm; The three-phase bridge arm includes a first bridge arm, a second bridge arm and a third bridge arm, and the three-phase coil includes a first coil (L1), a second coil (L2) and a third coil (L3); When the battery needs to be heated while being charged, in a first stage, the first bridge arm and / or the upper bridge arm of the second bridge arm, and the lower bridge arm of the third bridge arm are forward-conducted, and the current from the charging port charges the first coil (L1) and / or the second coil (L2), and the third coil (L3); the forward conduction is conducted from the first end of the bridge arm to the midpoint of the bridge arm; In the second stage, the first bridge arm and / or the lower bridge arm of the second bridge arm, and the upper bridge arm of the third bridge arm are reversely conducted, and the first coil (L1) and / or the second coil (L2), and the third coil (L3) discharge to the battery; the reverse conduction is conducted from the second end of the bridge arm to the midpoint of the bridge arm.

8. A charging heating method, characterized in that: Applied to the charging heating circuit according to any one of claims 1 to 7, the method comprises: Get the current status information of the battery; obtaining state requirement information based on the current state information, a preset charging condition, and a preset heating condition, wherein the preset charging condition is used to indicate whether the battery currently needs to be charged, the preset heating condition is used to indicate whether the battery currently needs to be heated, and the state requirement information is used to indicate whether the battery needs to be charged and whether it needs to be heated; When the state requirement information indicates that the battery needs to be heated while being charged, a first control instruction is issued, where the first control instruction is used to control both the first switch unit and the second switch unit in the charging and heating circuit to be turned on.

9. The charging heating method according to claim 8, characterized in that: The method further comprises: When the state requirement information indicates that the battery needs to be charged only without heating, issuing a second control instruction, wherein the second control instruction is used to control the first switch unit to be disconnected and the second switch unit to be connected; When the state requirement information indicates that the battery needs to be heated but not charged, a third control instruction is issued, where the third control instruction is used to control the first switch unit to be turned on and the second switch unit to be turned off.

10. The charging heating method according to claim 9, characterized in that: The first control instruction further includes a first charging requirement power for indicating the battery is charged, and a first heating requirement temperature for indicating the battery is heated; The second control instruction further includes a second charging required power for indicating the battery is being charged; The third control instruction further includes a second heating requirement temperature for indicating heating of the battery.

11. A charging heating system, characterized in that: The charging heating system includes: The charging heating circuit according to any one of claims 1 to 7; A battery management module is connected to the first switch unit and the second switch unit of the charging and heating circuit, and is used to control the first switch unit and the second switch unit to be turned on or off based on the current needs of the battery; the current needs of the battery include: charging and heating, charging without heating, and heating without charging.

12. The charging heating system according to claim 11, characterized in that: The charging and heating circuit further includes a motor control unit connected to the three-phase bridge arm of the power module and configured to control the switching states of the upper bridge arm and the lower bridge arm of the three-phase bridge arm.

13. A vehicle, characterized in that: The vehicle includes the charging heating system according to claim 11 .

Images