Vehicle-mounted charger, controller and vehicle

Abstract

The invention provides a vehicle-mounted charger, a controller and a vehicle, and relates to the technical field of vehicle-mounted chargers. The vehicle-mounted charger comprises a controller, a heating module and a water channel module, the controller is provided with a high-voltage plug connector and a low-voltage plug connector, the high-voltage plug connector is configured to be connected with a vehicle high-voltage network, and the low-voltage plug connector is configured to be connected with a vehicle control system; the heating module is coupled with the controller; the water channel module is arranged between the controller and the heating module, the water channel module is provided with a water inlet and a water outlet, the water inlet is configured to introduce cooling liquid, and the water outlet is configured to lead out the cooling liquid heated by the controller and / or the heating module. The heating module and the water channel module are integrated on the vehicle-mounted charger, so that the principle of a high-voltage power system of the new energy electric vehicle is simplified, the use of a power switch tube is reduced, and the heating module is convenient to set and control.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted chargers, and in particular to a vehicle-mounted charger, a controller and a vehicle. Background Art

[0002] As the penetration rate of new energy vehicles gradually increases, the competition among brands in the new energy field becomes increasingly fierce. Controlling the cost of the entire vehicle system through technological innovation has become an important means to enhance competitiveness. In new energy systems, component reuse is an effective means of reducing system costs and an industry trend. Component reuse technology at the system and subsystem principle level has developed rapidly in recent years, and vehicle manufacturers have continuously innovated their technology down to the internal components.

[0003] In existing vehicles, the onboard charger and electric heater are two independent components. The controller of the onboard charger is only used to control the charging and discharging of the power battery, and the electric heater is used to heat the power battery, the passenger compartment and other parts. The existing electric heater needs to set up a separate circuit, which makes the setting and control of the electric heater complicated. In view of this, it is necessary to provide a technology that can realize the integrated setting of electric heating devices to improve the reuse of the onboard charger controller and facilitate the setting and control of the electric heater. Summary of the invention

[0004] In view of the above shortcomings of the prior art, the present invention provides a vehicle-mounted charger to improve the technical problem that the existing electric heater needs to be equipped with a separate circuit, resulting in complicated installation of the electric heater.

[0005] To achieve the above-mentioned object and other related objects, the present invention provides a vehicle-mounted charger, including a controller, provided with a high-voltage connector and a low-voltage connector, the high-voltage connector is configured to be connected to the high-voltage network of the whole vehicle, and the low-voltage connector is configured to be connected to the vehicle control system; a heating module, coupled to the controller; a water channel module, arranged between the controller and the heating module, the water channel module is provided with a water inlet and a water outlet, the water inlet is configured to introduce coolant, and the water outlet is configured to lead out the coolant heated by the controller and / or the heating module.

[0006] In an exemplary embodiment of the present application, the controller includes a bidirectional DC conversion circuit, the bidirectional DC conversion circuit includes a transformer, a first switching circuit and a second switching circuit, the first switching circuit is connected to the primary side of the transformer, the second switching circuit is connected to the secondary side of the transformer, and the heating module is connected to the second switching circuit.

[0007] In an exemplary embodiment of the present application, the second switching circuit includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first power switch tube and a second power switch tube connected in series, the connection point between the first power switch tube and the second power switch tube forms the midpoint of the first bridge arm, the second bridge arm includes a third power switch tube and a fourth power switch tube connected in series, the connection point between the third power switch tube and the fourth power switch tube forms the midpoint of the second bridge arm; the heating module includes a fifth power switch tube and a heater, the fifth power switch tube and the heater are connected to the midpoint of the first bridge arm and the midpoint of the second bridge arm.

[0008] In an exemplary embodiment of the present application, the on-board charger includes a single charge and discharge mode, a battery heating mode and a charging and heating mode, wherein: the fifth power switch tube disconnects the connection between the heater and the second switch circuit, the first switch circuit, the transformer and the second switch circuit are used to convert the first direct current into the second direct current to charge the power battery, or the first switch circuit, the transformer and the second switch circuit are used to convert the second direct current into the first direct current for external discharge, and the on-board charger operates in the single charge and discharge mode; the fifth power switch tube conducts the connection between the heater and the second switch circuit, the power battery energizes the heater through the second switch circuit, so that the heater heats the water channel module, and the on-board charger operates in the battery heating mode; the fifth power switch tube conducts the connection between the heater and the first switch circuit, the first switch circuit and the transformer are used to convert the first direct current into the first alternating current to power the heater, and the on-board charger operates in the charging and heating mode.

[0009] In an exemplary embodiment of the present application, when the on-board charger operates in the battery heating mode, the first power switch tube and the fourth power switch tube are turned on, and the voltage value applied to the heater is controlled by the conduction frequency of the first power switch tube and the fourth power switch tube.

[0010] In an exemplary embodiment of the present application, when the on-board charger operates in the charging heating mode, the first power switch tube, the second power switch tube, the third power switch tube and the fourth power switch tube remain disconnected, and the first switch circuit inverts the first direct current into a first alternating current, and after coupling through the transformer, applies an alternating current voltage to the heater to cause the heater to generate heat.

[0011] In an exemplary embodiment of the present application, the heater is a PTC heater.

[0012] In an exemplary embodiment of the present application, the two ends of the secondary side of the transformer are connected to the midpoint of the first bridge arm and the midpoint of the second bridge arm through a first inductor and a first capacitor, respectively; the controller includes a power factor correction circuit, and the power factor correction circuit is connected to the primary side of the bidirectional DC conversion circuit.

[0013] The present application also provides a controller, which includes a first switching circuit, a transformer and a second switching circuit, the second switching circuit includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first power switch tube and a second power switch tube connected in series, the connection point between the first power switch tube and the second power switch tube forms the midpoint of the first bridge arm, the second bridge arm includes a third power switch tube and a fourth power switch tube connected in series, the connection point between the third power switch tube and the fourth power switch tube forms the midpoint of the second bridge arm; the midpoint of the first bridge arm and the midpoint of the second bridge arm are connected to a heater through a fifth power switch tube, and the heater exchanges heat with the vehicle thermal management pipeline.

[0014] The present application also provides a vehicle, which includes an on-board charger as described in any one of the above, or includes a controller as described in the above.

[0015] In combination with the prior art, the beneficial effects of the present invention are:

[0016] Existing electric heaters cannot be reused, which makes the setting of electric heaters complicated. This application simplifies the principle of the high-voltage power system of new energy electric vehicles by integrating the heating module and the water channel module on the on-board charger, reduces the use of power switch tubes, and facilitates the setting and control of the heating module.

[0017] The original electric heater and on-board charger need to be connected to the water channel respectively. After the electric heater and the on-board charger are integrated in this application, the controllers of the electric heater and the on-board charger share a water channel module, which reduces the setting of the water channel module and improves the utilization rate of the water channel module.

[0018] The integrated on-board charger controller is provided with high-voltage connectors and low-voltage connectors, and the water channel module is provided with a water inlet and a water outlet. The interface is simple and practical, which simplifies the on-board charging and discharging system and thermal management system, and facilitates design and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic diagram of an exemplary on-board charger structure of the present application;

[0021] Figure 2 A top view of an exemplary on-board charger of the present application;

[0022] Figure 3 This is an exemplary on-board charger circuit topology diagram of the present application;

[0023] Figure 4 This is a circuit topology diagram of an exemplary on-board charger operating in a single charge and discharge mode of the present application;

[0024] Figure 5 This is a circuit topology diagram of an exemplary on-board charger operating in battery heating mode of the present application;

[0025] Figure 6 This is a circuit topology diagram of an exemplary on-board charger operating in charging and heating mode of the present application.

[0026] Component number description

[0027] 100. controller; 110. bidirectional DC conversion circuit; 111. transformer; 1121. sixth power switch tube; 1122. seventh power switch tube; 1123. eighth power switch tube; 1124. ninth power switch tube; 1125. second capacitor; 1126. second inductor; 1131. first power switch tube; 1132. second power switch tube; 1133. third power switch tube; 1134. fourth power switch tube; 1135. first capacitor; 1136. first inductor; 120. high-voltage connector; 130. low-voltage connector; 140. power factor correction circuit; 200. heating module; 210. fifth power switch; 220. heater; 300. waterway module; 310. water inlet; 320. water outlet; 400. power battery. DETAILED DESCRIPTION

[0028] The following is an explanation of the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present invention are intended to describe specific embodiments, rather than to limit the scope of protection of the present invention. The test methods for which specific conditions are not specified in the following examples are usually carried out under conventional conditions or according to the conditions recommended by the manufacturers.

[0029] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise specified in the present invention, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in the present invention are familiar to those skilled in the art and the description of the present invention, and any methods, equipment and materials of the prior art similar or equivalent to the methods, equipment and materials described in the embodiments of the present invention can also be used to implement the present invention.

[0030] It should be noted that the terms such as "upper", "lower", "left", "right", "middle" and "one" etc. used in this specification are only for the convenience of description and are not intended to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships, without substantially changing the technical content, should also be regarded as the scope of implementation of the present invention.

[0031] With the development of electric vehicle technology, the comfort requirements of electric vehicles are getting higher and higher. Electric vehicles have many components that need to be heated, such as power batteries, passenger compartments, etc. Separately set up electric heating parts cause redundancy of electric vehicle components, which brings certain difficulties to design and assembly. Based on this, the present application provides an on-board charger that integrates an on-board charger with a heater, thereby facilitating the design and assembly of the overall structure of the electric vehicle.

[0032] See also Figures 1 to 6The present invention provides a vehicle charger, including a controller 100, a heating module 200 and a water channel module 300. The controller 100 is provided with a high-voltage connector 120 and a low-voltage connector 130. The high-voltage connector 120 is configured to be connected to the high-voltage network of the whole vehicle, and the positive and negative poles of the high-voltage network are connected to the control module to achieve the purpose of high-voltage power supply. The high-voltage power supply can be the positive controller 100 to supply power to the high-voltage network, and can also include the reverse vehicle high-voltage network to supply power to the controller 100. The low-voltage connector 130 is configured to be connected to the vehicle control system, which includes CAN communication, low-voltage power supply interface, etc., to achieve the purpose of low-voltage power supply, communication control, etc. The heating module 200 is coupled to the controller 100, and the heating module 200 is powered by the controller 100, so that the heating module 200 is integrated with the vehicle charger, which simplifies the high-voltage principle structure of the whole vehicle and saves the layout space of the whole vehicle. The water channel module 300 is arranged between the controller 100 and the heating module 200. The water channel module 300 is provided with a water inlet 310 and a water outlet 320. The water inlet 310 is configured to introduce coolant, and the water outlet 320 is configured to lead out the coolant heated by the controller 100 and / or the heating module 200. The controller 100 and the heating module 200 share a water channel module 300, which realizes the reuse of the water channel module 300, reduces the arrangement of the water channel module 300, and improves the utilization rate of the water channel module 300. The water channel module 300 absorbs and transfers heat, transfers the heat generated by the controller 100, and achieves the purpose of cooling the controller 100; at the same time, when the heating module 200 is working, it is responsible for absorbing the heat generated by the heating module 200 and transferring the heat, so as to achieve the purpose of heating the thermal management system.

[0033] See also Figure 3 . In one embodiment, the controller 100 is mainly responsible for the control and power conversion of the bidirectional on-board charger, the power supply and control of the heating module 200, and completes the communication with the whole vehicle system, AC charging and discharging functions and other functions. The controller 100 includes a power factor correction circuit 140 and a bidirectional DC conversion circuit 110, and the power factor correction circuit is connected to the primary side of the bidirectional DC conversion circuit 110. The input end of the power factor correction (PFC) circuit is connected to the AC charging pile, and the power factor correction circuit 140 has a rectifying effect and an inverting effect. The power factor correction circuit 140 converts the AC power from the power grid into a first DC power or converts the first DC power from the bidirectional DC conversion circuit 110 into AC power, so that the on-board charger can be forward charged and reverse discharged.

[0034] The bidirectional DC conversion circuit 110 is a bidirectional isolated converter for realizing bidirectional DC conversion. The bidirectional DC conversion circuit 110 can charge the power battery 400 after converting the first DC power obtained from the power factor correction circuit 140, and can also convert the second DC power obtained from the power battery 400 to feed power outward. The bidirectional DC conversion circuit 110 can be a bidirectional resonant converter (capacitor inductor capacitor, CLLC) circuit, a bidirectional active full bridge (DAB) circuit or other types of bidirectional isolated DC converters, etc., which are not limited here.

[0035] See also Figure 3 In one embodiment, the bidirectional DC conversion circuit 110 includes a transformer 111, a first switch circuit and a second switch circuit, the first switch circuit is connected to the primary side of the transformer 111, the second switch circuit is connected to the secondary side of the transformer 111, and the heating module 200 is connected to the second switch circuit, so that the heating module 200 is integrated with the original on-board charger, and the heating module 200 uses the second switch circuit to draw electricity from the power battery 400 or from the charging pile to generate heat. Compared with a separately set heating component, the heating module 200 of the present application uses the circuit of the controller 100 to reduce the redundancy of the control and power supply circuits of the heating module 200, facilitate the design and assembly of the heating module 200, and facilitate the control and management of the vehicle thermal management system.

[0036] See also Figure 3 In one embodiment, the second switch circuit includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first power switch tube 1131 and a second power switch tube 1132 connected in series, the connection point between the first power switch tube 1131 and the second power switch tube 1132 forms the midpoint of the first bridge arm, the second bridge arm includes a third power switch tube 1133 and a fourth power switch tube 1134 connected in series, the connection point between the third power switch tube 1133 and the fourth power switch tube 1134 forms the midpoint of the second bridge arm; the heating module 200 includes a fifth power switch tube 210 and a heater 220, the fifth power switch tube 210 and the heater 220 are connected to the midpoint of the first bridge arm and the midpoint of the second bridge arm respectively. By turning on and off the fifth power switch tube 210, the heater 220 and the second switch circuit can be turned on and off.

[0037] See also Figure 3In one embodiment, the two ends of the secondary side of the transformer 111 are respectively connected to the midpoint of the first bridge arm and the midpoint of the second bridge arm through the first inductor 1136 and the first capacitor 1135. Specifically, a first inductor 1136 is provided between the midpoint of the first bridge arm and one end of the secondary side of the transformer 111, and a first capacitor 1135 is provided between the middle point of the second bridge arm and the other end of the secondary side of the transformer 111. The first inductor 1136 and the first capacitor 1135 can be used to smooth the output voltage, reduce voltage fluctuations and noise, and limit the rate of current change to prevent current mutations from damaging the circuit.

[0038] See also Figure 3 In one embodiment, the first switch circuit has a third bridge arm and a fourth bridge arm connected in parallel, the third bridge arm includes a sixth power switch tube 1121 and a seventh power switch tube 1122 connected in series, the connection point between the sixth power switch tube 1121 and the seventh power switch tube 1122 forms the midpoint of the third bridge arm, and the fourth bridge arm includes an eighth power switch tube 1123 and a ninth power switch tube 1124 connected in series, the connection point between the eighth power switch tube 1123 and the ninth power switch tube 1124 forms the midpoint of the fourth bridge arm.

[0039] See also Figure 3 The two ends of the primary side of the transformer 111 are connected to the midpoint of the third bridge arm and the midpoint of the fourth bridge arm through the second inductor 1126 and the second capacitor 1125 respectively. Specifically, a second inductor 1126 is provided between the midpoint of the third bridge arm and one end of the primary side of the transformer 111, and a second capacitor 1125 is provided between the fourth bridge arm and the other end of the primary side of the transformer 111. The second inductor 1126 and the second capacitor 1125 can smooth the output voltage, reduce voltage fluctuations and noise, and limit the rate of current change to prevent current mutations from damaging the circuit.

[0040] See also Figures 4 to 6In one embodiment, the on-board charger includes a single charge and discharge mode, a battery heating mode, and a charging and heating mode, so as to meet the charging and heating requirements in different scenarios. Wherein: the fifth power switch tube 210 disconnects the connection between the heater 220 and the second switch circuit, the first switch circuit, the transformer 111, and the second switch circuit are used to convert the first direct current into the second direct current to charge the power battery 400, or the first switch circuit, the transformer 111, and the second switch circuit are used to convert the second direct current into the first direct current to discharge outward, and the on-board charger operates in the single charge and discharge mode; the fifth power switch tube 210 conducts the connection between the heater 220 and the second switch circuit, and the power battery 400 is The heater 220 is energized through the second switch circuit so that the heater 220 heats the water channel module 300, and the on-board charger operates in the battery heating mode; the fifth power switch tube 210 conducts the connection between the heater 220 and the first switch circuit, and the first switch circuit and the transformer 111 are used to convert the first direct current into the first alternating current to power the heater 220, and the on-board charger operates in the charging heating mode. By running the on-board charger in different modes, the needs of charging and discharging and heating in different scenarios, and heat dissipation of the controller 100, etc. are met.

[0041] See also Figure 4 When the vehicle performs AC charging and discharging functions, the fifth power switch tube 210 is controlled to be in the disconnected state and maintained, and the heating module 200 is in the disconnected and non-working state. Through the bidirectional on-board charger circuit, that is, the power factor correction circuit 140 and the bidirectional DC conversion circuit 110, the energy conversion work of AC charging / discharging is completed according to the needs of the vehicle. For example, when the AC power of the AC charging pile is converted into the second DC power to power the power battery 400 by the on-board charger, the power factor correction circuit 140 runs the rectification mode to convert the AC power of the AC charging pile into the first DC power, and the bidirectional DC conversion circuit 110 converts the first DC power into the second DC power to power the power battery 400. When the second DC power from the power battery 400 is converted into AC power for external output by the on-board charger, the bidirectional DC conversion circuit 110 converts the second DC power into the first DC power, and the power factor correction circuit 140 runs the inverter mode to convert the first DC power into AC power for external output. At this time, the water channel module 300 acts as a cooling module to dissipate heat from the controller 100 and reduce the temperature of the heating elements in the controller 100; at the same time, if the passenger compartment needs to be heated, the heat generated by the bidirectional on-board charger circuit will be used to heat the passenger compartment, thereby effectively improving energy utilization, reducing costs, and saving resources.

[0042] See also Figure 5In the non-AC charging and discharging scenario, when the vehicle power battery 400 and / or the passenger compartment need to be heated, the on-board charger needs to operate the battery heating mode, that is, the power battery 400 supplies energy to the heater 220, so that the heater 220 generates heat to heat the power battery 400 and / or the passenger compartment. When the on-board charger operates in the battery heating mode, the first power switch tube 1131 and the fourth power switch tube 1134 are turned on, and the voltage value applied to the heater 220 is controlled by the conduction frequency of the first power switch tube 1131 and the fourth power switch tube 1134. For example, the first direct current of the power battery 400 is converted into the first alternating current and applied to the heater 220 through the conduction frequency of the first power switch tube 1131 and the fourth power switch tube 1134, so that the heater 220 generates heat, and then performs heat exchange with the water channel module 300, thereby heating the vehicle power battery 400 and / or the passenger compartment, such as preheating the passenger compartment of the vehicle in a cold scene.

[0043] See also Figure 6When AC charging is performed under extremely cold conditions, the entire vehicle is in extremely cold conditions, and the charging power of the power battery 400 is very small or even cannot be charged. In order to increase the charging power, the power battery 400 needs to be heated to a certain temperature point before charging. However, due to the low temperature, the discharge power of the power battery 400 cannot support the operation of the heater 220, so it is necessary to use an external power supply to power the heater 220 to heat the power battery 400. The vehicle charger operates in the charging and heating mode. The first power switch tube 1131, the second power switch tube 1132, the third power switch tube 1133, and the fourth power switch tube 1134 remain disconnected, and the first switch circuit inverts the first direct current into the first alternating current, and after coupling through the transformer 111, applies an alternating current voltage to the heater 220, so that the heater 220 heats the water channel module 300. In one embodiment, the fifth power switch tube 210 is controlled to be turned on, and the transformer 111, the first inductor 1136, the first capacitor 1135, the fifth power switch tube 210 and the heater 220 communicate a complete current loop. When the vehicle is connected to the AC power of the charging pile, the power factor correction circuit 140 works normally, converts the AC power into the first DC power, and then the sixth power switch tube 1121, the seventh power switch tube 1122, the eighth power switch tube 1123 and the ninth power switch tube 1124 form an inverter circuit to convert the first DC power into a voltage-controllable AC power. After coupling with the transformer 111, a voltage-controllable AC voltage can be obtained on the heater 220, thereby realizing the heating function of the heater 220, and the heating power is controllable. Through the heat exchange between the heating module 200 and the water channel module 300, the heat is transmitted to the power battery 400 through the thermal management system to heat the power battery 400. When the temperature of the power battery 400 rises to a certain value or the chargeable power is greater than the maximum power of the on-board charger, the charging and heating mode is exited and the single charge and discharge mode is operated to ensure the charging efficiency.

[0044] In one embodiment, the heater 220 is a PTC heater 220 , that is, heat is generated by a positive temperature coefficient resistor.

[0045] In one embodiment, each of the power switch tubes is a MOS tube, and MOS tubes with different parameters and qualities can be used based on the characteristic requirements of each module. Further, the controller in the bidirectional charger can be connected to the control end of all the power switch tubes in the bidirectional charger, and control the voltage of the control end of the power switch tube in each module based on the characteristic requirements of each module to achieve control of the power switch tube in each module.

[0046] Furthermore, the bidirectional charger may also include a protection capacitor connected between the positive electrode and the negative electrode of the output terminal of the bidirectional charger to prevent a voltage mutation at the output terminal of the bidirectional charger.

[0047] The present application also provides a controller, the controller 100 includes a first switch circuit, a transformer 111, and a second switch circuit, the second switch circuit includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first power switch tube 1131 and a second power switch tube 1132 connected in series, the connection point between the first power switch tube 1131 and the second power switch tube 1132 forms the midpoint of the first bridge arm, the second bridge arm includes a third power switch tube 1133 and a fourth power switch tube 1134 connected in series, the connection point between the third power switch tube 1133 and the fourth power switch tube 1134 forms the midpoint of the second bridge arm; the midpoint of the first bridge arm and the midpoint of the second bridge arm are connected to a heater 220 through a fifth power switch tube 210, and the heater 220 exchanges heat with the vehicle thermal management pipeline. The heater 220 is connected to the controller 100 through the fifth power switch tube 210, so that the heating needs in different scenarios are realized through the cooperation of the first switch circuit, the transformer 111, and the second switch circuit, so as to facilitate the control and arrangement of the heater 220 and the design of the vehicle thermal management system.

[0048] The present application also provides a vehicle, which includes an on-board charger as described in any one of the above, or includes a controller 100 as described in the above, and the vehicle also includes other components, such as a power battery 400, a motor and a vehicle body, etc. This application does not elaborate on this, please refer to the existing vehicle structure.

[0049] This application simplifies the principle of the vehicle's high-voltage power system by integrating the heating module 200 with the on-board charger, realizes the reuse of the controller 100, improves the reuse of high-voltage power switch tubes, and reduces the setting of high-voltage power switch tubes; by setting the water channel module 300 between the controller 100 and the heating module 200, the reuse of the water channel is realized, saving the layout of the water channel. The on-board charger can operate in single charge and discharge mode, battery heating mode and charging and heating mode, so as to meet the requirements of charging and discharging in different scenarios, heating requirements of the power battery 400 and / or the passenger compartment, and heat dissipation of the controller 100.

[0050] Therefore, the present invention effectively overcomes some practical problems in the prior art and thus has high utilization value and use significance. The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A vehicle-mounted charger, characterized in that: include: A controller is provided with a high-voltage connector and a low-voltage connector, wherein the high-voltage connector is configured to be connected to the high-voltage network of the vehicle, and the low-voltage connector is configured to be connected to the vehicle control system; A heating module, coupled to the controller; A water channel module is arranged between the controller and the heating module. The water channel module is provided with a water inlet and a water outlet. The water inlet is configured to introduce coolant, and the water outlet is configured to lead out the coolant heated by the controller and / or the heating module.

2. The vehicle-mounted charger according to claim 1, characterized in that: The controller includes a bidirectional DC conversion circuit, which includes a transformer, a first switch circuit and a second switch circuit, the first switch circuit is connected to the primary side of the transformer, the second switch circuit is connected to the secondary side of the transformer, and the heating module is connected to the second switch circuit.

3. The vehicle-mounted charger according to claim 2, characterized in that: The second switch circuit includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first power switch tube and a second power switch tube connected in series, the connection point between the first power switch tube and the second power switch tube forms a midpoint of the first bridge arm, and the second bridge arm includes a third power switch tube and a fourth power switch tube connected in series, the connection point between the third power switch tube and the fourth power switch tube forms a midpoint of the second bridge arm; The heating module includes a fifth power switch tube and a heater, and the fifth power switch tube and the heater are connected to a midpoint of the first bridge arm and a midpoint of the second bridge arm.

4. The vehicle-mounted charger according to claim 3, characterized in that: The on-board charger includes a single charge and discharge mode, a battery heating mode and a charging and heating mode, wherein: The fifth power switch tube disconnects the heater from the second switch circuit, the first switch circuit, the transformer and the second switch circuit are used to convert the first direct current into the second direct current to charge the power battery, or the first switch circuit, the transformer and the second switch circuit are used to convert the second direct current into the first direct current to discharge externally, and the on-board charger operates in the single charge and discharge mode; The fifth power switch tube conducts the connection between the heater and the second switch circuit, and the power battery energizes the heater through the second switch circuit, so that the heater heats the water channel module, and the on-board charger operates in the battery heating mode; The fifth power switch tube conducts the connection between the heater and the first switch circuit. The first switch circuit and the transformer are used to convert the first direct current into the first alternating current to power the heater. The on-board charger operates in the charging heating mode.

5. The vehicle-mounted charger according to claim 4, characterized in that: When the on-board charger operates in the battery heating mode, the first power switch tube and the fourth power switch tube are turned on, and the voltage value applied to the heater is controlled by the conduction frequency of the first power switch tube and the fourth power switch tube.

6. The vehicle-mounted charger according to claim 4, characterized in that: When the on-board charger operates in the charging heating mode, the first power switch tube, the second power switch tube, the third power switch tube and the fourth power switch tube remain disconnected, and the first switch circuit inverts the first direct current into the first alternating current, and after coupling through the transformer, applies the alternating current voltage to the heater to make the heater generate heat.

7. The vehicle-mounted charger according to claim 3, characterized in that: The heater is a PTC heater.

8. The vehicle-mounted charger according to claim 3, characterized in that: The two ends of the secondary side of the transformer are connected to the midpoint of the first bridge arm and the midpoint of the second bridge arm through a first inductor and a first capacitor respectively; the controller includes a power factor correction circuit, and the power factor correction circuit is connected to the primary side of the bidirectional DC conversion circuit.

9. A controller, characterized in that: The controller includes a first switch circuit, a transformer, and a second switch circuit, the second switch circuit includes a first bridge arm and a second bridge arm connected in parallel, the first bridge arm includes a first power switch tube and a second power switch tube connected in series, the connection point between the first power switch tube and the second power switch tube forms the midpoint of the first bridge arm, the second bridge arm includes a third power switch tube and a fourth power switch tube connected in series, the connection point between the third power switch tube and the fourth power switch tube forms the midpoint of the second bridge arm; The midpoint of the first bridge arm and the midpoint of the second bridge arm are connected to a heater via a fifth power switch tube, and the heater exchanges heat with a vehicle thermal management pipeline.

10. A vehicle, characterized in that: The vehicle includes the on-board charger according to any one of claims 1 to 8, or includes the controller according to claim 9.

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