Control circuit compatible with multiple platforms, vehicle-mounted charger and control system

Abstract

The invention relates to the field of vehicle-mounted chargers, in particular to a control circuit compatible with multiple platforms, a vehicle-mounted charger and a control system, and the control circuit comprises a transformer T1 which is provided with a primary winding W1, a first secondary winding W21 and a second secondary winding W22; the primary side circuit is coupled with the primary side winding W1; the input end of the high-voltage secondary side circuit is coupled with the first secondary side winding W21 and the second secondary side winding W22; a switching unit; for a high-voltage secondary side circuit, the switching unit is arranged among the first secondary side winding W21, the second secondary side winding W22 and the high-voltage secondary side circuit and is used for switching the series-parallel connection relation of the first secondary side winding W21 and the second secondary side winding W22; for a plurality of high-voltage secondary circuits, the switching unit is arranged between the output ends of the high-voltage secondary circuits and is used for switching the series-parallel connection relation of the output ends. The vehicle-mounted charger has the effect of widening the output range of the vehicle-mounted charger, so that the same vehicle-mounted charger can meet the charging requirements of different vehicle-mounted batteries.

Description

Technical Field

[0001] The present application relates to the field of vehicle-mounted chargers, and in particular to a control circuit, a vehicle-mounted charger and a control system that are compatible with multiple platforms. Background Art

[0002] An on-board charger is a charging device installed on an electric vehicle that allows the vehicle to charge its battery by connecting to an external power source (usually a household power source or a public charging station). A magnetically integrated on-board charger is a device that uses magnetic integration technology to achieve high power density and high efficiency of the on-board charger. By integrating multiple power electronic conversion functions into a single magnetic component, the system size and weight are reduced while improving overall performance and reliability.

[0003] For example, the Chinese patent publication number CN117542623A is a magnetic integrated transformer and an accessory in a vehicle-mounted three-port converter. Figure 4 In the circuit shown, the first secondary circuit is connected to the B port, and can obtain the DC power generated by the transformer through the second winding and the third winding, and convert it into AC power to output a high-voltage signal from the B port. The second secondary circuit is connected to the C port, and can obtain the AC power generated by the transformer through the fourth winding and the fifth winding, and convert it into DC power to output a low-voltage signal from the C port.

[0004] An on-board charger can generally only meet the charging needs of one platform (such as 400V or 800V platform), that is, the same charger is difficult to meet the charging needs of different on-board batteries, and the output voltage range is relatively small. Summary of the invention

[0005] In order to broaden the output range of the on-board charger so that the same on-board charger can meet the charging needs of different on-board batteries, the present application provides a control circuit, an on-board charger and a control system that are compatible with multiple platforms.

[0006] In a first aspect, the present application provides a control circuit compatible with multiple platforms, which adopts the following technical solution:

[0007] A control circuit compatible with multiple platforms, comprising: a transformer T1, provided with a primary winding W1, a first secondary winding W21, and a second secondary winding W22; a primary circuit, coupled to the primary winding W1; one or more high-voltage secondary circuits, the input end of which is coupled to the first secondary winding W21 and the second secondary winding W22; a switching unit; for one high-voltage secondary circuit, the switching unit is arranged between the first secondary winding W21, the second secondary winding W22 and the high-voltage secondary circuit, and is used to switch the series-parallel relationship between the first secondary winding W21 and the second secondary winding W22; for multiple high-voltage secondary circuits, the switching unit is arranged between the output ends of the high-voltage secondary circuits, and is used to switch the series-parallel relationship of the output ends.

[0008] Optionally, for a high-voltage secondary circuit, the switching unit includes a switch K1 and a switch K2; the first end of the switch K1 is coupled to the first end of the first secondary winding W21, the second end of the switch K1 is coupled to the first end of the high-voltage secondary circuit and the first end of the switch K2, the second end of the switch K2 is coupled to the first end of the second secondary winding W22 and the first end of the first secondary winding W21, and the second end of the second secondary winding W22 is coupled to the second end of the high-voltage secondary circuit.

[0009] Optionally, the high-voltage secondary circuit includes: a switch tube Q5, a switch tube Q6, a switch tube Q7, a switch tube Q8, and a capacitor C2; the output end of the high-voltage secondary circuit is connected to a high-voltage battery HV; the first end of the switch tube Q5 is coupled to the first end of the high-voltage battery HV and the first end of the switch tube Q7, and the second end of the switch tube Q5 is coupled to the first end of the switch K1, the first end of the switch K2, and the first end of the switch tube Q6; the second end of the high-voltage battery HV is coupled to the second end of the switch tube Q8 and the second end of the switch tube Q6; the second end of the switch tube Q7 is coupled to the first end of the switch tube Q8 and the first end of the capacitor C2; the second end of the switch K1 is coupled to the first end of the first secondary winding W21, the second end of the switch K2 is coupled to the second end of the first secondary winding W21 and the first end of the second secondary winding W22; the second end of the capacitor C2 is coupled to the second end of the second secondary winding W22.

[0010] Optionally, for a high-voltage secondary circuit, the switching unit includes a switch K1, a switch K2, and a switch K3; the first end of the switch K1 is coupled to the first end of the second secondary winding W22 and the first end of the switch K2, and the second end of the switch K1 is coupled to the first end of the first secondary winding W21 and the first end of the switch K3; the second end of the switch K2 is coupled to the first end of W21 and the first end of the high-voltage secondary circuit; the second end of the switch K3 is coupled to the second end of the second secondary winding W22 and the second end of the high-voltage secondary circuit.

[0011] Optionally, the high-voltage secondary circuit includes: a switch tube Q5, a switch tube Q6, a switch tube Q7, a switch tube Q8, and a capacitor C2; the output end of the high-voltage secondary circuit is connected to a high-voltage battery HV; the first end of the switch tube Q5 is coupled to the first end of the high-voltage battery HV and the first end of the switch tube Q7, and the second end of the switch tube Q5 is coupled to the first end of the first secondary winding W21, the first end of the switch K2, and the first end of the switch tube Q6; the second end of the high-voltage battery HV is coupled to the second end of the switch tube Q8 and the second end of the switch tube Q6; the second end of the switch tube Q7 is coupled to the first end of the switch tube Q8 and the first end of the capacitor C2; the second end of the switch K2 is coupled to the first end of the switch K1 and the first end of the second secondary winding W22, the second end of the switch K1 is coupled to the first end of the switch K3, and the second end of the switch K3 is coupled to the second end of the capacitor C2 and the second end of the second secondary winding W22.

[0012] Optionally, for two high-voltage secondary circuits, the switching unit includes a switch K1, a switch K2 and a switch K3; the high-voltage battery HV includes a high-voltage battery HV1 and a high-voltage battery HV2, the output end of one high-voltage secondary circuit is connected to the high-voltage battery HV1, and the output end of the other high-voltage secondary circuit is connected to the high-voltage battery HV2; the first end of the switch K1 is coupled to the first end of the high-voltage battery HV1 and the first end of the switch K3, the second end of the switch K1 is coupled to the first end of the high-voltage battery HV2 and the first end of the switch K2, the second end of the switch K3 is coupled to the second end of the high-voltage battery HV2, and the second end of the switch K2 is coupled to the second end of the high-voltage battery HV1.

[0013] Optionally, the transformer T1 is provided with a third secondary winding W3 and a fourth secondary winding W4; the control circuit also includes a low-voltage secondary circuit, a first end of the low-voltage secondary circuit is coupled to the third secondary winding W3, and a second end of the low-voltage secondary circuit is coupled to the fourth secondary winding W4.

[0014] Optionally, the use modes of the control circuit include a high-voltage platform mode and a low-voltage platform mode, and the high-voltage platform mode includes: a charging mode, in which electric energy is transmitted from the primary circuit to the primary winding W1, transmitted to the high-voltage battery HV through the first secondary winding W21 and the second secondary winding W22, and transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4; a DCDC mode, in which electric energy is transmitted from the high-voltage battery HV to the primary winding W1 through the first secondary winding W21 and the second secondary winding W22, and then transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4; an inverter mode, in which electric energy is transmitted from the high-voltage battery HV to the primary winding W1 through the first secondary winding W21 and the second secondary winding W22, and then transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4, and output through the primary circuit.

[0015] In a second aspect, the present application provides a vehicle-mounted charger that uses the above-mentioned multi-platform compatible control circuit.

[0016] In a third aspect, the present application provides a control system, including a controller and a memory, wherein the memory stores preset control instructions, and according to the control instructions, the controller controls the above-mentioned on-board charger to switch the usage mode.

[0017] This application has the following technical effects:

[0018] 1. The effect of broadening the output range of the on-board charger is to enable the same on-board charger to meet the charging needs of different on-board batteries (such as 400V and 800V platforms). The switching unit allows switching between different connection configurations, providing more system configuration options to adapt to different charging scenarios and needs, and to adapt to on-board batteries of different voltage levels, increasing the versatility of the on-board charger.

[0019] 2. Able to adapt to different power conversion requirements, including charging, DCDC conversion and inversion, increasing the versatility of the circuit.

[0020] 3. The switching function is realized by using fewer electrical components (2-3 switches), which simplifies the circuit setting, reduces the size of the overall equipment, enhances the portability of the on-board charger, and reduces the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] By reading the detailed description below with reference to the accompanying drawings, the above and other purposes, features and advantages of the exemplary embodiments of the present application will become easily understood. In the accompanying drawings, several embodiments of the present application are shown in an exemplary and non-restrictive manner, and the same or corresponding numbers represent the same or corresponding parts.

[0022] Figure 1 This is the circuit topology diagram of Example 1 of the present application.

[0023] Figure 2 This is a circuit topology diagram of the on-board charger in Example 1 of the present application when operating at an 800V platform.

[0024] Figure 3 This is a circuit topology diagram showing the energy flow direction of the charging mode when the on-board charger in Example 1 of the present application operates at an 800V platform.

[0025] Figure 4 This is a circuit topology diagram showing the energy flow direction of the DCDC mode when the on-board charger in Example 1 of the present application operates at an 800V platform.

[0026] Figure 5This is a circuit topology diagram showing the energy flow direction in the inverter mode when the on-board charger in Example 1 of the present application operates at 800V.

[0027] Figure 6 This is a circuit topology diagram of the on-board charger in Example 1 of the present application operating on a 400V platform.

[0028] Figure 7 This is the circuit topology diagram of Example 2 of the present application.

[0029] Figure 8 This is a circuit topology diagram of the on-board charger in Example 2 of the present application when operating at an 800V platform.

[0030] Fig. 9 This is a circuit topology diagram showing the energy flow direction of the charging mode when the on-board charger in Example 2 of the present application operates at an 800V platform.

[0031] Fig.10 This is a circuit topology diagram showing the energy flow direction of the DCDC mode when the on-board charger in Example 2 of the present application operates at an 800V platform.

[0032] Fig.11 This is a circuit topology diagram showing the energy flow direction in the inverter mode when the on-board charger in Example 2 of the present application operates at an 800V platform.

[0033] Fig.12 This is a circuit topology diagram of the on-board charger in Example 2 of the present application operating on a 400V platform.

[0034] Fig.13 This is the circuit topology diagram of Example 3 of the present application.

[0035] Fig.14 This is a circuit topology diagram of the on-board charger in Example 3 of the present application when operating at an 800V platform.

[0036] Fig.15 This is a circuit topology diagram showing the energy flow direction of the charging mode when the on-board charger in Example 3 of the present application operates at an 800V platform.

[0037] Fig.16 This is a circuit topology diagram showing the energy flow direction of the DCDC mode when the on-board charger in Example 3 of the present application operates at an 800V platform.

[0038] Fig.17 This is a circuit topology diagram showing the energy flow direction in the inverter mode when the on-board charger in Example 3 of the present application operates at 800V.

[0039] Fig.18 This is a circuit topology diagram of the on-board charger in Example 3 of the present application operating on a 400V platform. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0041] It should be understood that when the terms "first", "second", etc. are used in the claims, specification and drawings of the present application, they are only used to distinguish different objects, rather than to describe a specific order. The terms "include" and "comprise" used in the specification and claims of the present application indicate the presence of the described features, wholes, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or their collections.

[0042] The embodiments of the present application disclose a control circuit that can be applied to a magnetically integrated vehicle-mounted charger or other charging devices that can be applied to the present application. The three embodiments, namely, Embodiment 1 to Embodiment 3, are used for description. The principles of Embodiment 1 and Embodiment 2 are to switch the series-parallel relationship between the transformer windings. The principle of Embodiment 3 is to change the series-parallel relationship of the battery pack on the high-voltage battery side.

[0043] The three embodiments can achieve the following effects: broaden the output range of the on-board charger, so that the same on-board charger can work on both the 400V platform and the 800V platform.

[0044] The specific scheme of this application is as follows:

[0045] Embodiment 1, wherein Figure 1-Figure 6 FIG. 1 is a diagram corresponding to Example 1, referring to Figure 1 and Figure 2 The control circuit includes a primary circuit, a transformer T1, a high-voltage secondary circuit, a low-voltage secondary circuit, and a switching unit.

[0046] The transformer T1 is provided with a primary winding W1, a first secondary winding W21, a second secondary winding W22, a third secondary winding W3 and a fourth secondary winding W4. The primary winding W1 is the input winding of the transformer T1, receiving the alternating current from the primary circuit, and the first secondary winding W21, the second secondary winding W22, the third secondary winding W3 and the fourth secondary winding W4 are four output windings respectively, and the multi-output configuration can provide different voltage levels.

[0047] The switching unit includes a switch K1 and a switch K2, wherein the first end of the switch K1 is coupled to the first end of the first secondary winding W21, the second end of the switch K1 is coupled to the first end of the high-voltage secondary circuit and the first end of the switch K2, the second end of the switch K2 is coupled to the first end of the second secondary winding W22 and the first end of the first secondary winding W21, and the second end of the second secondary winding W22 is coupled to the second end of the high-voltage secondary circuit.

[0048] The primary circuit is coupled with the primary winding W1. Specifically, the primary circuit includes: a power factor correction output VBUS, a switch tube Q1, a switch tube Q2, a switch tube Q3, a switch tube Q4, an inductor L1, and a capacitor C1; the first end of the switch tube Q1 is coupled with the first end of the power factor correction output VBUS and the first end of the switch tube Q3, and the second end of the switch tube Q1 is coupled with the first end of the switch tube Q2 and the first end of the inductor L1; the second end of the switch tube Q3 is coupled with the second end of the switch tube Q4 and the second end of the capacitor C1; the second end of the switch tube Q2 is coupled with the second end of the power factor correction output VBUS and the second end of the switch tube Q4; and the two ends of the primary winding W1 are respectively coupled with the second end of the inductor L1 and the second end of the capacitor C1.

[0049] The input end of the primary circuit is connected to the power factor correction output VBUS, and the primary circuit can convert the VUBS direct current into alternating current and output it to the primary winding W1.

[0050] The first end of the high-voltage secondary circuit is coupled to the first secondary winding W21, the second end of the high-voltage secondary circuit is coupled to the second secondary winding W22, and a high-voltage battery HV is arranged in the high-voltage secondary circuit. Specifically, the high-voltage secondary circuit includes: switch tube Q5, switch tube Q6, switch tube Q7, switch tube Q8, and capacitor C2. The first end of the switch tube Q5 is coupled to the first end of the high-voltage battery HV and the first end of the switch tube Q7, and the second end of the switch tube Q5 is coupled to the first end of the switch K1, the first end of the switch K2, and the first end of the switch tube Q6; the second end of the high-voltage battery HV is coupled to the second end of the switch tube Q8 and the second end of the switch tube Q6; the second end of the switch tube Q7 is coupled to the first end of the switch tube Q8 and the first end of the capacitor C2; the second end of the switch K1 is coupled to the first end of the first secondary winding W21, the second end of the switch K2 is coupled to the second end of the first secondary winding W21 and the first end of the second secondary winding W22; the second end of the capacitor C2 is coupled to the second end of the second secondary winding W22.

[0051] The output end of the high-voltage secondary circuit is connected to a high-voltage battery HV. The high-voltage secondary circuit can convert the alternating current generated by the first secondary winding W21 and the second secondary winding W22 of the transformer T1 into direct current to charge the high-voltage battery HV. A first end of the low-voltage secondary circuit is coupled to the third secondary winding W3, and a second end of the low-voltage secondary circuit is coupled to the fourth secondary winding W4. Specifically, the low-voltage secondary circuit includes: a switch tube Q9, a switch tube Q10, a switch tube Q11, a switch tube Q12, and an inductor L2; a first end of the switch tube Q9 is coupled to the switch tube Q10, the switch tube Q12, and a first end of the low-voltage battery LV, and a second end of the switch tube Q9 is coupled to a second end of the fourth secondary winding W4; a second end of the switch tube Q10 is coupled to a first end of the third secondary winding W3, a second end of the switch tube Q12 is coupled to a first end of the inductor L2 and a first end of the switch tube Q11, and a second end of the low-voltage battery LV is coupled to a second end of the inductor L2; a second end of the switch tube Q11 is coupled to a second end of the third secondary winding W3 and a first end of the fourth secondary winding W4.

[0052] The output end of the low-voltage secondary circuit is connected to a low-voltage battery LV, and the low-voltage secondary circuit can convert the AC power generated by the third secondary winding W3 and the fourth secondary winding W4 of the transformer T1 into DC power to charge the low-voltage battery LV. Figure 3-Figure 5 When switch K1 is closed and switch K2 is open, the on-board charger operates on the 800V platform (high-voltage platform mode). At this time, the use modes of the control circuit include: charging mode, DCDC mode, and inverter mode.

[0053] In charging mode, refer to Figure 3 , the electric energy is transmitted from VBUS to the primary winding W1 through the primary circuit, and is transmitted to the high-voltage battery HV through the first secondary winding W21 and the second secondary winding W22 through the high-voltage secondary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit; in DCDC mode, refer to Figure 4 , the electric energy is transmitted from the high-voltage battery HV to the first secondary winding W21 and the second secondary winding W22 through the high-voltage secondary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit; in the inverter mode, refer to Figure 5 The electric energy is transmitted from the high-voltage battery HV to the first secondary winding W21 and the second secondary winding W22 through the high-voltage secondary circuit, and is transmitted to VBUS through the primary winding W1 through the primary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit. The switches in this application are not limited to relays, MOSFETs, IGBTs, etc., and will not be described in detail later.

[0054] Reference Figure 6When switch K2 is closed and switch K1 is open, the on-board charger operates on the 400V platform (low-voltage platform mode). At this time, the high-voltage battery HV can support the 400V platform voltage output.

[0055] Embodiment 2, Figure 7-Figure 12 For the accompanying drawings corresponding to Example 2, refer to Figure 7 and Figure 8 , Embodiment 2 differs from Embodiment 1 in the setting of the switching unit, specifically: the switching unit includes a switch K1, a switch K2 and a switch K3.

[0056] The first end of the switch K1 is coupled to the first end of the second secondary winding W22 and the first end of the switch K2, and the second end of the switch K1 is coupled to the first end of the first secondary winding W21 and the first end of the switch K3; the second end of the switch K2 is coupled to the first end of W21 and the first end of the high-voltage secondary circuit; the second end of the switch K3 is coupled to the second end of the second secondary winding W22 and the second end of the high-voltage secondary circuit.

[0057] The high-voltage secondary circuit includes: a switch tube Q5, a switch tube Q6, a switch tube Q7, a switch tube Q8, and a capacitor C2; a first end of the switch tube Q5 is coupled to a first end of the high-voltage battery HV and a first end of the switch tube Q7, and a second end of the switch tube Q5 is coupled to a first end of the first secondary winding W21, a first end of the switch K2, and a first end of the switch tube Q6; a second end of the high-voltage battery HV is coupled to a second end of the switch tube Q8 and a second end of the switch tube Q6; a second end of the switch tube Q7 is coupled to a first end of the switch tube Q8 and a first end of the capacitor C2; a second end of the switch K2 is coupled to a first end of the switch K1 and a first end of the second secondary winding W22, a second end of the switch K1 is coupled to a first end of the switch K3, and a second end of the switch K3 is coupled to a second end of the capacitor C2 and a second end of the second secondary winding W22.

[0058] Reference Figure 9-11 When the switch K1 is closed, the switches K2 and K3 are opened, the first secondary winding W21 and the second secondary winding W22 are connected in series, so that the high-voltage battery HV can support the 800V platform voltage output. At this time, when the on-board charger operates on the 800V platform, the operating conditions of the on-board charger include charging mode, DCDC mode and inverter mode.

[0059] In charging mode, refer to Fig. 9 , the electric energy is transmitted from VBUS to the primary winding W1 through the primary circuit, and is transmitted to the high-voltage battery HV through the first secondary winding W21 and the second secondary winding W22 through the high-voltage secondary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit; in DCDC mode, refer to Fig.10, the electric energy is transmitted from the high-voltage battery HV to the first secondary winding W21 and the second secondary winding W22 through the high-voltage secondary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit; in the inverter mode, refer to Fig.11 The electric energy is transmitted from the high-voltage battery HV to the first secondary winding W21 and the second secondary winding W22 through the high-voltage secondary circuit, transmitted to VBUS through the primary winding W1 through the primary circuit, and transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit. Fig.12 When the switch K1 is opened, the switches K2 and K3 are closed, the first secondary winding W21 and the second secondary winding W22 are connected in parallel, so that the HV can support a 400V platform voltage output.

[0060] Embodiment 3, Figure 13-Figure 18 For the accompanying drawings corresponding to Example 3, refer to Fig.13 and Fig.14 , which is different from Example 2 in that: a plurality of high-voltage secondary circuits are provided, and a switching unit is provided.

[0061] The present application takes two high-voltage secondary circuits as an example, and sets two high-voltage secondary circuits, namely a first high-voltage secondary circuit and a second high-voltage secondary circuit. The first high-voltage secondary circuit and the second high-voltage secondary circuit are coupled with both ends of the first secondary winding W21, and the second high-voltage secondary circuit is coupled with both ends of the second secondary winding W22;

[0062] The high-voltage battery HV includes a high-voltage battery HV1 and a high-voltage battery HV2. The high-voltage battery HV1 is arranged at the voltage output end of the first high-voltage secondary circuit for storing and / or releasing electric energy, and the high-voltage battery HV2 is arranged at the voltage output end of the second high-voltage secondary circuit for storing and / or releasing electric energy.

[0063] The first end of the switch K1 is coupled to the first end of the high-voltage battery HV1 and the first end of the switch K3, and the second end of the switch K1 is coupled to the first end of the high-voltage battery HV2 and the first end of the switch K2; the second end of the switch K3 is coupled to the second end of the high-voltage battery HV2, and the second end of the switch K2 is coupled to the second end of the high-voltage battery HV1.

[0064] The first high-voltage secondary circuit includes: a switch tube Q51, a switch tube Q61, a switch tube Q71, a switch tube Q81, and a capacitor C21; the first end of the switch tube Q51 is coupled with the first end of the switch tube Q71 and the second end of the high-voltage battery HV1, and the second end of the switch tube Q51 is coupled with the first end of the second secondary winding W21 and the first end of the switch tube Q61; the second end of the switch tube Q71 is coupled with the first end of the capacitor C21 and the first end of the switch tube Q81, the second end of the capacitor C21 is coupled with the second end of the second secondary winding W21, and the second end of the switch tube Q81 is coupled with the first end of the high-voltage battery HV1.

[0065] The second high-voltage secondary circuit includes: a switch tube Q52, a switch tube Q62, a switch tube Q72, a switch tube Q82, and a capacitor C22; the first end of the switch tube Q52 is coupled to the first end of the switch tube Q72 and the first end of the high-voltage battery HV2, and the second end of the switch tube Q52 is coupled to the first end of the second secondary winding W22 and the first end of the switch tube Q62; the second end of the switch tube Q72 is coupled to the first end of the capacitor C22 and the first end of the switch tube Q82, the second end of the capacitor C22 is coupled to the second end of the second secondary winding W22, and the second end of the switch tube Q82 is coupled to the second end of the high-voltage battery HV2.

[0066] Reference Figure 15-17 When switch K1 is closed, switches K2 and K3 are opened, the outputs of high-voltage battery HV1 and high-voltage battery HV2 are connected in series, so that the high-voltage battery HV can support the 800V platform voltage output. At this time, the use modes of the control circuit include: charging mode, DCDC mode, and inverter mode.

[0067] In charging mode, refer to Fig.15 , the electric energy is transmitted from VBUS to the primary winding W1 through the primary circuit, and is transmitted to the high-voltage battery HV1 through the first secondary winding W21 through the first high-voltage secondary circuit, and is transmitted to the high-voltage battery HV2 through the second secondary winding W22 through the second high-voltage secondary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit; in DCDC mode, refer to Fig.16 , the electric energy is transmitted from the high-voltage battery HV1 to the first secondary winding W21 through the first high-voltage secondary circuit, and is transmitted from the high-voltage battery HV2 to the second secondary winding W22 through the second high-voltage secondary circuit, and is transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit;

[0068] In inverter mode, refer to Fig.17The electric energy is transmitted from the high-voltage battery HV1 to the first secondary winding W21 through the first high-voltage secondary circuit, and from the high-voltage battery HV2 to the second secondary winding W22 through the second high-voltage secondary circuit, and then transmitted to VBUS through the primary winding W1 through the primary circuit, and then transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4 through the low-voltage secondary circuit. Fig.18 When switch K1 is disconnected, switches K2 and K3 are closed, the outputs of the high-voltage battery HV1 and the high-voltage battery HV2 are connected in parallel, so that the high-voltage battery HV supports a 400V platform voltage output, thereby enhancing the power output capacity of the high-voltage battery HV.

[0069] The embodiment of the present application also discloses a vehicle-mounted charger, which uses the above-mentioned multi-platform compatible control circuit.

[0070] The embodiment of the present application also discloses a control system, in which a memory stores preset control instructions, and according to the control instructions, a controller controls the above-mentioned on-board charger to switch the usage mode.

[0071] The control system can realize automatic switching between 400V and 800V systems, as well as switching between charging mode, DCDC mode and inverter mode.

[0072] The user can adjust the mode manually or through the controller according to the control instruction. For example, the user can manually adjust the mode through an intuitive user interface, which improves the convenience of operation and user experience. The controller automatically switches the use mode of the on-board charger according to the preset control instructions in the memory to achieve intelligent management.

[0073] Although this specification has shown and described a plurality of embodiments of the present application, it is obvious to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art will think of many changes, modifications and alternatives without departing from the thought and spirit of the present application. It should be understood that in the process of practicing the present application, various alternatives to the embodiments of the present application described herein may be adopted.

[0074] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A control circuit compatible with multiple platforms, characterized in that: include: The transformer T1 is provided with a primary winding W1, a first secondary winding W21, and a second secondary winding W22; The primary circuit is coupled with the primary winding W1; One or more high-voltage secondary circuits, the input end of which is coupled to the first secondary winding W21 and the second secondary winding W22; Switching unit; For a high-voltage secondary circuit, the switching unit is arranged between the first secondary winding W21, the second secondary winding W22 and the high-voltage secondary circuit, and is used to switch the series-parallel relationship between the first secondary winding W21 and the second secondary winding W22; For multiple high-voltage secondary circuits, the switching unit is arranged between the output ends of the high-voltage secondary circuits to switch the series-parallel relationship of the output ends.

2. The multi-platform compatible control circuit according to claim 1, characterized in that: For a high-voltage secondary circuit, the switching unit includes a switch K1 and a switch K2; The first end of the switch K1 is coupled to the first end of the first secondary winding W21, the second end of the switch K1 is coupled to the first end of the high-voltage secondary circuit and the first end of the switch K2, the second end of the switch K2 is coupled to the first end of the second secondary winding W22 and the first end of the first secondary winding W21, and the second end of the second secondary winding W22 is coupled to the second end of the high-voltage secondary circuit.

3. The multi-platform compatible control circuit according to claim 2, characterized in that: The high-voltage secondary circuit includes: a switch tube Q5, a switch tube Q6, a switch tube Q7, a switch tube Q8, and a capacitor C2; the output end of the high-voltage secondary circuit is connected to a high-voltage battery HV; The first end of the switch tube Q5 is coupled to the first end of the high-voltage battery HV and the first end of the switch tube Q7, and the second end of the switch tube Q5 is coupled to the first end of the switch K1, the first end of the switch K2, and the first end of the switch tube Q6; the second end of the high-voltage battery HV is coupled to the second end of the switch tube Q8 and the second end of the switch tube Q6; the second end of the switch tube Q7 is coupled to the first end of the switch tube Q8 and the first end of the capacitor C2; the second end of the switch K1 is coupled to the first end of the first secondary winding W21, and the second end of the switch K2 is coupled to the second end of the first secondary winding W21 and the first end of the second secondary winding W22; the second end of the capacitor C2 is coupled to the second end of the second secondary winding W22.

4. The multi-platform compatible control circuit according to claim 1, characterized in that: For a high-voltage secondary circuit, the switching unit includes a switch K1, a switch K2 and a switch K3; The first end of the switch K1 is coupled to the first end of the second secondary winding W22 and the first end of the switch K2, and the second end of the switch K1 is coupled to the first end of the first secondary winding W21 and the first end of the switch K3; the second end of the switch K2 is coupled to the first end of W21 and the first end of the high-voltage secondary circuit; the second end of the switch K3 is coupled to the second end of the second secondary winding W22 and the second end of the high-voltage secondary circuit.

5. The multi-platform compatible control circuit according to claim 4, characterized in that: The high-voltage secondary circuit includes: a switch tube Q5, a switch tube Q6, a switch tube Q7, a switch tube Q8, and a capacitor C2; the output end of the high-voltage secondary circuit is connected to a high-voltage battery HV; The first end of the switch tube Q5 is coupled to the first end of the high-voltage battery HV and the first end of the switch tube Q7, and the second end of the switch tube Q5 is coupled to the first end of the first secondary winding W21, the first end of the switch K2, and the first end of the switch tube Q6; the second end of the high-voltage battery HV is coupled to the second end of the switch tube Q8 and the second end of the switch tube Q6; the second end of the switch tube Q7 is coupled to the first end of the switch tube Q8 and the first end of the capacitor C2; the second end of the switch K2 is coupled to the first end of the switch K1 and the first end of the second secondary winding W22, the second end of the switch K1 is coupled to the first end of the switch K3, and the second end of the switch K3 is coupled to the second end of the capacitor C2 and the second end of the second secondary winding W22.

6. The multi-platform compatible control circuit according to claim 1, characterized in that: For two high-voltage secondary circuits, the switching unit includes a switch K1, a switch K2 and a switch K3; the high-voltage battery HV includes a high-voltage battery HV1 and a high-voltage battery HV2, the output end of one high-voltage secondary circuit is connected to the high-voltage battery HV1, and the output end of the other high-voltage secondary circuit is connected to the high-voltage battery HV2; The first end of the switch K1 is coupled to the first end of the high-voltage battery HV1 and the first end of the switch K3, the second end of the switch K1 is coupled to the first end of the high-voltage battery HV2 and the first end of the switch K2, the second end of the switch K3 is coupled to the second end of the high-voltage battery HV2, and the second end of the switch K2 is coupled to the second end of the high-voltage battery HV1.

7. The multi-platform compatible control circuit according to any one of claims 1 to 6, characterized in that: The transformer T1 is provided with a third secondary winding W3 and a fourth secondary winding W4; The control circuit further includes a low-voltage secondary circuit, a first end of the low-voltage secondary circuit is coupled to the third secondary winding W3, and a second end of the low-voltage secondary circuit is coupled to the fourth secondary winding W4.

8. The multi-platform compatible control circuit according to claim 7, characterized in that: The use modes of the control circuit include a high voltage platform mode and a low voltage platform mode, and the high voltage platform mode includes: In charging mode, electric energy is transmitted from the primary circuit to the primary winding W1, and then to the high-voltage battery HV through the first secondary winding W21 and the second secondary winding W22, and then to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4; In DCDC mode, electric energy is transmitted from the high-voltage battery HV to the primary winding W1 through the first secondary winding W21 and the second secondary winding W22, and then transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4; In the inverter mode, electric energy is transmitted from the high-voltage battery HV to the primary winding W1 through the first secondary winding W21 and the second secondary winding W22, and then transmitted to the low-voltage battery LV through the third secondary winding W3 and the fourth secondary winding W4, and output through the primary circuit.

9. A vehicle-mounted charger, characterized in that: A multi-platform compatible control circuit as described in any one of claims 1 to 8 is used.

10. A control system, characterized in that: It comprises a controller and a memory, wherein the memory stores preset control instructions, and according to the control instructions, the controller controls the on-board charger of claim 9 to switch the use mode.

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