A high-voltage controller and a high-voltage control system

Abstract

This invention provides a high-voltage controller and a high-voltage control system, belonging to the technical field of high-voltage controllers. The high-voltage controller proposed in this invention includes an OBC module, a DC-DC converter module, and a PDU module, which are integrated together. The PDU module is connected to the positive terminal of the OBC module's battery, the high-voltage positive terminal of the DC-DC converter module is connected to the positive terminal of the OBC module's battery, and the high-voltage negative terminal of the DC-DC converter module is connected to the negative terminal of the OBC module's battery. The PDU module is electrically connected to an electric compressor and an electric heater. Compared with existing technologies, this invention effectively solves the problems of high cost and large size in existing technologies.

Description

Technical Field

[0001] This invention belongs to the field of high voltage controller technology, specifically relating to a high voltage controller and a high voltage control system. Background Technology

[0002] Currently, the existing high-voltage controllers have separate OBC (On-Board Charger) and DCDC (Direct Current to DC) converters, which are not integrated into one unit, resulting in higher costs and larger size.

[0003] Furthermore, current high-voltage controllers use fuses for their PDUs (Power Distribution Units). Once a fuse blows, it needs to be replaced, which affects the airtightness of the PDU. Therefore, the entire PDU is usually replaced, which not only takes a long time but also increases unnecessary costs.

[0004] In summary, existing high-voltage controllers suffer from high cost and large size. Summary of the Invention

[0005] The purpose of this invention is to provide a high-voltage controller and a high-voltage control system to solve the problems of high cost and large size in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, the present invention provides a high-voltage controller, including an OBC module, a DC-DC module, and a PDU module, wherein the OBC module, the DC-DC module, and the PDU module are integrated together.

[0008] A further improvement of the present invention is that the PDU module is connected to the positive terminal of the OBC module's battery, the high voltage positive terminal of the DC-DC module is connected to the positive terminal of the OBC module's battery, and the high voltage negative terminal of the DC-DC module is connected to the negative terminal of the OBC module's battery.

[0009] A further improvement of the present invention is that the OBC module includes a first rectifier circuit, a first inverter circuit, and a first transformer. The first rectifier circuit includes a first power transistor, a second power transistor, a third power transistor, and a fourth power transistor. The first inverter circuit includes a fifth power transistor, a sixth power transistor, a seventh power transistor, and an eighth power transistor. The drain of the first power transistor is connected to the drain of the second power transistor. The source of the first power transistor and the source of the fourth power transistor are both connected to the primary side of the first transformer. The drains of the third power transistor and the fourth power transistor are both connected to the primary side of the first transformer. The source of the third power transistor is connected to the fourth power transistor. The source of the transistor; the drain of the fifth power transistor is connected to the drain of the sixth power transistor, the source of the fifth power transistor and the source of the sixth power transistor are both connected to the secondary side of the first transformer, the drain of the seventh power transistor and the drain of the eighth power transistor are both connected to the secondary side of the first transformer, and the source of the seventh power transistor is connected to the source of the eighth power transistor; the gates of the first power transistor, the second power transistor, the third power transistor, the fourth power transistor, the fifth power transistor, the sixth power transistor, the seventh power transistor, and the eighth power transistor are connected to the corresponding power transistor drive circuits.

[0010] A further improvement of the present invention is that a capacitor is connected in parallel with the first rectifier circuit for filtering.

[0011] A further improvement of the present invention is that the DC-DC module includes a second rectifier circuit, a second inverter circuit, and a second transformer. The second rectifier circuit includes a ninth power transistor, a tenth power transistor, an eleventh power transistor, and a twelfth power transistor. The second inverter circuit includes a thirteenth power transistor, a fourteenth power transistor, a fifteenth power transistor, and a sixteenth power transistor. The drain of the ninth power transistor is connected to the drain of the tenth power transistor. The sources of the ninth and tenth power transistors are both connected to the primary side of the second transformer. The drains of the eleventh and twelfth power transistors are both connected to the primary side of the second transformer. The source of the eleventh power transistor is connected to the drain of the twelfth power transistor. The source of the thirteenth power transistor is connected to the drain of the fourteenth power transistor. The sources of the thirteenth and fourteenth power transistors are both connected to the secondary side of the second transformer. The drains of the fifteenth and sixteenth power transistors are both connected to the secondary side of the second transformer. The source of the fifteenth power transistor is connected to the source of the sixteenth power transistor. The gates of the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, and sixteenth power transistors are connected to the corresponding power transistor drive circuits.

[0012] A further improvement of the present invention is that the second rectifier circuit is connected to the low-voltage positive terminal and the low-voltage negative terminal of the DC-DC module, and the second inverter circuit is connected in parallel with a capacitor for filtering.

[0013] A further improvement of the present invention is that the PDU module is electrically connected to the electric compressor and the electric heater.

[0014] A further improvement of the present invention is that the PDU module includes a seventeenth power transistor, an eighteenth power transistor, and a nineteenth power transistor. The drain of the seventeenth power transistor is connected to an electric compressor, and the drains of the eighteenth and nineteenth power transistors are both connected to an electric heater. The source of the seventeenth power transistor is connected to the positive terminal of the electric compressor, and the sources of the eighteenth and nineteenth power transistors are both connected to the positive terminal of the electric heater. The gate of the seventeenth power transistor is connected to the source of the eighteenth power transistor, and the gate of the eighteenth power transistor is connected to the source of the nineteenth power transistor.

[0015] A further improvement of the present invention is that the power transistor is a MOSFET or an IGBT.

[0016] Secondly, the present invention provides a high-voltage control system, including a high-voltage controller, which includes an OBC module, a DC-DC module and a PDU module, wherein the OBC module, the DC-DC module and the PDU module are integrated together.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention is an improved invention. Compared with existing high-voltage controllers, the high-voltage controller proposed in this invention integrates the OBC module, DC-DC module and PDU module together. It can be seen that the high-voltage controller proposed in this invention integrates the OBC module, DC-DC module and PDU module into one piece. Some components can be used together, reducing the occupied area and cost, and effectively solving the problems of high cost and large size in the prior art.

[0019] Furthermore, this invention discloses a DC-DC module comprising a second rectifier circuit, a second inverter circuit, and a second transformer, as well as the connection relationships between the components of the second rectifier circuit, the second inverter circuit, and the second transformer. It is evident that this invention can achieve low-voltage electricity boosting to high-voltage electricity and high-voltage electricity stepping down to low-voltage electricity through the second rectifier circuit, the second inverter circuit, and the second transformer of the DC-DC module. Moreover, when the DC-DC module boosts low-voltage electricity to high-voltage electricity, it can pre-charge the battery pack, thereby eliminating the need for a separate battery pre-charging circuit. Attached Figure Description

[0020] Figure 1 This is a circuit diagram of the high-voltage controller of the present invention. Detailed Implementation

[0021] To further understand the content of this invention, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments are merely illustrative and not limiting of the invention.

[0022] The high-voltage controller proposed in this invention includes an OBC module, a DC-DC converter module, and a PDU module, which are integrated together. Compared with the prior art, this invention effectively solves the problems of high cost and large size in the prior art.

[0023] Example of a high-voltage controller:

[0024] The circuit diagram of the high-voltage controller of this invention is as follows: Figure 1 As shown, the technical solution of the present invention is specifically described as follows:

[0025] The high-voltage controller proposed in this invention includes an OBC module (also called OBC), a DC-DC module (also called DC-DC), and a PDU module (also called PDU), which are integrated together.

[0026] The PDU module is connected to the positive terminal BAT+ of the OBC module's battery, the high-voltage positive terminal HV+ of the DCDC module is connected to the positive terminal BAT+ of the OBC module's battery, and the high-voltage negative terminal HV- of the DCDC module is connected to the negative terminal BAT- of the OBC module's battery.

[0027] The PDU module is electrically connected to the electric compressor EAC and the electric heater PTC. In this embodiment, the PDU module input is electrically connected to two electric heaters PTC (PTC1 FUSE and PTC2 FUSE), and the PDU module is electrically connected to one electric compressor EAC (EAC FUSE). The PDU module output is connected to PTC1+, PTC2+, and EAC+ respectively.

[0028] The OBC module includes a first rectifier circuit (also called rectifier circuit 1), a first inverter circuit (also called inverter circuit 1), and a first transformer T1. The first rectifier circuit includes a first power transistor (also called power transistor 1), a second power transistor (also called power transistor 2), a third power transistor (also called power transistor 3), and a fourth power transistor (also called power transistor 4). The first inverter circuit includes a fifth power transistor (also called power transistor 5), a sixth power transistor (also called power transistor 6), a seventh power transistor (also called power transistor 7), and an eighth power transistor (also called power transistor 8). The drain of the first power transistor is connected to the drain of the second power transistor. The source of the first power transistor and the source of the fourth power transistor are both connected to the primary side of the first transformer T1. The drains of the third power transistor and the fourth power transistor are both connected to the primary side of the first transformer T1. The source of the third power transistor is connected to the source of the fourth power transistor. The drain of the fifth power transistor is connected to the drain of the sixth power transistor. The sources of both the fifth and sixth power transistors are connected to the secondary side of the first transformer T1. The drains of both the seventh and eighth power transistors are connected to the secondary side of the first transformer T1, and the source of the seventh power transistor is connected to the source of the eighth power transistor. The gates of the first, second, third, fourth, fifth, sixth, seventh, and eighth power transistors are connected to their respective power transistor drive circuits. Figure 1 The red pentagon in the middle is connected to the corresponding power transistor driver circuit. A capacitor C1 is connected in parallel with the first rectifier circuit for filtering.

[0029] The DC-DC module includes a second rectifier circuit (also called rectifier circuit 2), a second inverter circuit (also called inverter circuit 2), and a second transformer T2. The second rectifier circuit includes a ninth power transistor (also called power transistor 9), a tenth power transistor (also called power transistor 10), an eleventh power transistor (also called power transistor 11), and a twelfth power transistor (also called power transistor 12). The second inverter circuit includes a thirteenth power transistor (also called power transistor 13), a fourteenth power transistor (also called power transistor 15), a fifteenth power transistor (also called power transistor 15), and a sixteenth power transistor (also called power transistor 16). The drain of the ninth power transistor is connected to the drain of the tenth power transistor. The sources of the ninth and tenth power transistors are both connected to the primary side of the second transformer T2. The drains of the eleventh and twelfth power transistors are both connected to the primary side of the second transformer T2. The source of the eleventh power transistor is connected to the source of the twelfth power transistor. The drain of the thirteenth power transistor is connected to the drain of the fourteenth power transistor. The sources of both the thirteenth and fourteenth power transistors are connected to the secondary side of the second transformer T2. The drains of both the fifteenth and sixteenth power transistors are connected to the secondary side of the second transformer T2, and the source of the fifteenth power transistor is connected to the source of the sixteenth power transistor. The gates of the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, and sixteenth power transistors are connected to their respective power transistor drive circuits. Figure 1 The red pentagon in the middle connects to the corresponding power transistor drive circuit. The second rectifier circuit connects to the low-voltage positive terminal LV+ and the low-voltage negative terminal LV- of the DCDC module. The second inverter circuit has a capacitor C2 connected in parallel for filtering. It can be seen that the DCDC module of this invention is bidirectional, capable of boosting low-voltage electricity to high-voltage electricity and stepping high-voltage electricity down to low-voltage electricity. Moreover, when boosting low-voltage electricity to high-voltage electricity, it can pre-charge the battery pack, thus eliminating the need for a separate battery pre-charge circuit.

[0030] The PDU module includes a seventeenth power transistor (also called power transistor 17), an eighteenth power transistor (also called power transistor 18), and a nineteenth power transistor (also called power transistor 19). The drain of the seventeenth power transistor is connected to the EAC fuse of the electric compressor; the drains of the eighteenth and nineteenth power transistors are both connected to the PTC heaters (PTC1 fuse and PTC2 fuse). The source of the seventeenth power transistor is connected to the positive terminal EAC+ of the electric compressor; the sources of the eighteenth and nineteenth power transistors are both connected to the positive terminals of the electric heaters (PTC1+ and PTC2+). The gate of the seventeenth power transistor is connected to the source of the eighteenth power transistor, and the gate of the eighteenth power transistor is connected to the source of the nineteenth power transistor. The PDU module controls the on / off state of the PDU module circuit through these power transistors. The specific working principle of these power transistors is explained below:

[0031] When the current reaches the set current threshold, the power transistor disconnects. This current threshold is set based on the power values ​​of the electric compressor's EAC and the electric heater's PTC; there is no specific value for the current threshold. Once the current returns to normal, the power transistor closes, and the PDU module circuit returns to normal. This avoids unnecessary costs and time consumption associated with replacing fuses in the PDU module. Furthermore, the power transistor's fast switching speed and low failure probability improve the circuit's safety and reliability.

[0032] In this embodiment, the power transistors used are all MOSFETs or IGBTs. The specific model of the power transistor in this embodiment needs to be selected according to the voltage and current values ​​of the circuit, and there is no specific model.

[0033] Example of a high-voltage control system:

[0034] The high-voltage control system includes a high-voltage controller, which comprises an OBC module, a DC-DC converter module, and a PDU module, all integrated together. This embodiment refers to an embodiment of the high-voltage controller, and will not be repeated here.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A high-voltage controller, characterized in that, It includes an OBC module, a DC-DC module, and a PDU module, which are integrated together. The PDU module is connected to the positive terminal of the OBC module's battery, the high voltage positive terminal of the DC-DC module is connected to the positive terminal of the OBC module's battery, and the high voltage negative terminal of the DC-DC module is connected to the negative terminal of the OBC module's battery. The OBC module includes a first rectifier circuit, a first inverter circuit, and a first transformer. The first rectifier circuit includes a first power transistor, a second power transistor, a third power transistor, and a fourth power transistor. The first inverter circuit includes a fifth power transistor, a sixth power transistor, a seventh power transistor, and an eighth power transistor. The drain of the first power transistor is connected to the drain of the second power transistor. The source of the first power transistor and the source of the fourth power transistor are both connected to the primary side of the first transformer. The drain of the third power transistor and the drain of the fourth power transistor are both connected to the primary side of the first transformer. The source of the third power transistor is connected to the source of the fourth power transistor. The drain of the fifth power transistor is connected to the drain of the sixth power transistor. The sources of the fifth and sixth power transistors are both connected to the secondary side of the first transformer. The drains of the seventh and eighth power transistors are both connected to the secondary side of the first transformer. The source of the seventh power transistor is connected to the source of the eighth power transistor. The gates of the first, second, third, fourth, fifth, sixth, seventh, and eighth power transistors are connected to the corresponding power transistor drive circuits.

2. The high-voltage controller according to claim 1, characterized in that, The first rectifier circuit has a capacitor connected in parallel for filtering.

3. The high-voltage controller according to claim 1, characterized in that, The DC-DC module includes a second rectifier circuit, a second inverter circuit, and a second transformer. The second rectifier circuit includes a ninth power transistor, a tenth power transistor, an eleventh power transistor, and a twelfth power transistor. The second inverter circuit includes a thirteenth power transistor, a fourteenth power transistor, a fifteenth power transistor, and a sixteenth power transistor. The drain of the ninth power transistor is connected to the drain of the tenth power transistor. The sources of the ninth and tenth power transistors are both connected to the primary side of the second transformer. The drains of the eleventh and twelfth power transistors are both connected to the primary side of the second transformer. The source of the eleventh power transistor is connected to the source of the twelfth power transistor. The drain of the thirteenth power transistor is connected to the drain of the fourteenth power transistor. The sources of the thirteenth power transistor and the fourteenth power transistor are both connected to the secondary side of the second transformer. The drains of the fifteenth power transistor and the sixteenth power transistor are both connected to the secondary side of the second transformer. The source of the fifteenth power transistor is connected to the source of the sixteenth power transistor. The gates of the ninth, tenth, eleventh, twelfth, thirteenth, fourteenth, fifteenth, and sixteenth power transistors are connected to the corresponding power transistor drive circuits.

4. The high-voltage controller according to claim 3, characterized in that, The second rectifier circuit is connected to the low-voltage positive and low-voltage negative terminals of the DC-DC module, and the second inverter circuit is connected in parallel with a capacitor for filtering.

5. The high-voltage controller according to claim 1, characterized in that, The PDU module is electrically connected to the electric compressor and the electric heater.

6. The high-voltage controller according to claim 5, characterized in that, The PDU module includes a seventeenth power transistor, an eighteenth power transistor, and a nineteenth power transistor. The drain of the seventeenth power transistor is connected to an electric compressor, and the drains of the eighteenth and nineteenth power transistors are both connected to an electric heater. The source of the seventeenth power transistor is connected to the positive terminal of the electric compressor, and the sources of the eighteenth and nineteenth power transistors are both connected to the positive terminal of the electric heater. The gate of the seventeenth power transistor is connected to the source of the eighteenth power transistor, and the gate of the eighteenth power transistor is connected to the source of the nineteenth power transistor.

7. The high-voltage controller according to claim 6, characterized in that, The power transistor is either a MOSFET or an IGBT.

8. A high-voltage control system, characterized in that, It includes a high-voltage controller, which comprises an OBC module, a DC-DC module, and a PDU module, wherein the OBC module, the DC-DC module, and the PDU module are integrated together. The PDU module is connected to the positive terminal of the OBC module's battery, the high voltage positive terminal of the DC-DC module is connected to the positive terminal of the OBC module's battery, and the high voltage negative terminal of the DC-DC module is connected to the negative terminal of the OBC module's battery. The OBC module includes a first rectifier circuit, a first inverter circuit, and a first transformer. The first rectifier circuit includes a first power transistor, a second power transistor, a third power transistor, and a fourth power transistor. The first inverter circuit includes a fifth power transistor, a sixth power transistor, a seventh power transistor, and an eighth power transistor. The drain of the first power transistor is connected to the drain of the second power transistor. The source of the first power transistor and the source of the fourth power transistor are both connected to the primary side of the first transformer. The drain of the third power transistor and the drain of the fourth power transistor are both connected to the primary side of the first transformer. The source of the third power transistor is connected to the source of the fourth power transistor. The drain of the fifth power transistor is connected to the drain of the sixth power transistor. The sources of the fifth and sixth power transistors are both connected to the secondary side of the first transformer. The drains of the seventh and eighth power transistors are both connected to the secondary side of the first transformer. The source of the seventh power transistor is connected to the source of the eighth power transistor. The gates of the first, second, third, fourth, fifth, sixth, seventh, and eighth power transistors are connected to the corresponding power transistor drive circuits.

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