Vehicle-mounted integrated circuit and vehicle

Abstract

The utility model proposes a vehicle-mounted integrated circuit and a vehicle, and the integrated circuit comprises at least two OBC circuits, and the at least two OBC circuits are connected in parallel, and are used for charging a device to be charged in a charging state and / or a discharging state. According to the utility model, the plurality of OBC circuits are connected in parallel, so that different power requirements of a vehicle can be met by increasing or reducing the number of the OBC circuits connected in parallel, and flexible expansion of the power requirements is realized. Moreover, the OBC circuits are connected in parallel, when one OBC circuit breaks down, the other OBC circuits without faults can still work, the charging fault of the whole vehicle caused by partial faults of the circuits is avoided, the charging reliability of the vehicle is improved, the driving safety and the user experience of the vehicle are improved, meanwhile, an additional vehicle-mounted power supply does not need to be adopted, and the cost is reduced. And the weight of the whole vehicle is reduced while the vehicle-mounted cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a vehicle-mounted integrated circuit and a vehicle. Background Art

[0002] At present, with the popularization of electric vehicles, the power demand of on-board power supply is gradually increasing, and users' requirements for vehicle safety and reliability are also gradually increasing.

[0003] In the related art, the vehicle power supply cannot be expanded to meet different power requirements, and when a part of the power circuit fails, the vehicle will be unable to perform AC charging or will break down. The reliability is weak and the user experience is poor. If an additional redundant vehicle power supply is used, it is easy to increase the cost of the vehicle power supply and increase the weight of the vehicle. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, one purpose of the utility model is to propose a vehicle-mounted integrated circuit, which improves the charging reliability and fault tolerance of the vehicle, thereby improving the vehicle's driving safety and user experience. At the same time, there is no need to use an additional vehicle-mounted power supply, thereby reducing the vehicle cost and the weight of the entire vehicle.

[0006] To this end, a second objective of the present invention is to provide a vehicle.

[0007] In order to achieve the above-mentioned purpose, an embodiment of the first aspect of the utility model proposes a vehicle-mounted integrated circuit, including: at least two OBC (On Board Charger) circuits, at least two of the OBC circuits are connected in parallel to charge the device to be charged.

[0008] According to the on-board integrated circuit of the embodiment of the utility model, by connecting multiple OBC circuits in parallel, different power requirements of the vehicle can be met by increasing or decreasing the parallel number of OBC circuits, thereby realizing flexible expansion of power requirements. In addition, by connecting the OBC circuits in parallel, if one of the OBC circuits fails, the remaining fault-free OBC circuits can continue to work, thereby avoiding charging failure of the entire vehicle caused by partial circuit failure, so that the charging function will not be completely lost, thereby improving the charging reliability and fault tolerance of the vehicle, and then improving the driving safety and user experience of the vehicle. At the same time, there is no need to use an additional on-board power supply, thereby reducing the vehicle cost and the weight of the entire vehicle.

[0009] In addition, the vehicle-mounted integrated circuit according to the embodiment of the utility model may also have the following additional technical features:

[0010] In some embodiments, the device to be charged includes a first device to be charged, and each of the OBC circuits includes: a PFC conversion subcircuit, one end of the PFC (Power Factor Correction) conversion subcircuit is connected to the AC charging port; a voltage conversion subcircuit, one end of the voltage conversion subcircuit is connected to the other end of the PFC conversion subcircuit, and the other end of the voltage conversion subcircuit is connected to the first device to be charged.

[0011] In some embodiments, the voltage conversion subcircuit includes: a primary side conversion subcircuit, one end of the primary side conversion subcircuit is connected to the other end of the PFC conversion subcircuit; a secondary side first conversion subcircuit, one end of the secondary side first conversion subcircuit is originally connected to the primary side conversion subcircuit, and the other end of the secondary side first conversion subcircuit is connected to the first device to be charged, so as to cooperate with the primary side conversion subcircuit or the secondary side first conversion subcircuit to realize the DCDC conversion function, and charge the second device to be charged in the charging state and / or discharging state.

[0012] In some embodiments, the device to be charged also includes a second device to be charged, and each of the OBC circuits also includes: a secondary side second conversion subcircuit, one end of the secondary side second conversion subcircuit is connected to the other end of the primary side conversion subcircuit, and the other end of the secondary side second conversion subcircuit is connected to the second device to be charged.

[0013] In some embodiments, each of the OBC circuits further includes: a magnetically integrated transformer, the primary winding of the magnetically integrated transformer being connected to the other end of the primary conversion subcircuit, the secondary first winding of the magnetically integrated transformer being connected to one end of the secondary first conversion subcircuit, and the secondary second winding of the magnetically integrated transformer being connected to one end of the secondary second conversion subcircuit.

[0014] In some embodiments, the on-board integrated circuit further includes: a first EMI circuit, one end of the first EMI circuit is connected to the AC charging port, and the other end of the first EMI circuit is connected to one end of the PFC conversion sub-circuit.

[0015] In some embodiments, the on-board integrated circuit further includes: a second EMI circuit, one end of the second EMI circuit is connected to the other end of the secondary side first conversion subcircuit, and the other end of the second EMI circuit is connected to the first device to be charged.

[0016] In some embodiments, the on-board integrated circuit also includes: at least two first switches, at least two of the first switches are arranged corresponding to at least two of the OBC circuits, one end of each of the first switches is connected to the other end of the first EMI circuit, and the other end of each of the first switches is connected to one end of the PFC conversion sub-circuit.

[0017] In some embodiments, the on-board integrated circuit also includes: at least two second switches, at least two second switches are arranged corresponding to at least two OBC circuits, one end of each second switch is connected to a point at the other end of the first EMI circuit, and the other end of each second switch is connected to one end of the PFC conversion sub-circuit.

[0018] In order to achieve the above-mentioned object, an embodiment of a second aspect of the present utility model provides a vehicle, comprising the on-board integrated circuit as described in the above-mentioned embodiment.

[0019] According to the vehicle of the embodiment of the utility model, the different power requirements of the vehicle are met by increasing or decreasing the number of parallel OBC circuits, thereby realizing flexible expansion of power requirements and flexible selection of AC input phase. Moreover, by connecting the OBC circuits in parallel, if one of the OBC circuits fails, the remaining healthy OBC circuits can continue to work, thus avoiding charging failure of the entire vehicle caused by partial circuit failure, and preventing the charging function from being completely lost, thereby improving the reliability and fault tolerance of the vehicle, and further improving the driving safety and user experience of the vehicle. At the same time, there is no need to use an additional on-board power supply, thereby reducing the vehicle cost and the weight of the entire vehicle.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic structural diagram of a vehicle-mounted integrated circuit according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic diagram of a three-phase input vehicle-mounted integrated circuit according to an embodiment of the utility model;

[0024] Figure 3 It is a schematic diagram of a single-phase input vehicle-mounted integrated circuit according to an embodiment of the utility model;

[0025] Figure 4is a schematic diagram of another single-phase input vehicle-mounted integrated circuit according to an embodiment of the utility model;

[0026] Figure 5 is a schematic diagram of a vehicle-mounted integrated circuit according to an embodiment of the utility model;

[0027] Figure 6 The invention relates to a vehicle according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] On-board integrated circuit 10;

[0030] OBC circuit 2;

[0031] PFC conversion sub-circuit 21; voltage conversion sub-circuit 22;

[0032] Secondary side second conversion sub-circuit 23; magnetic integrated transformer 24; primary side conversion sub-circuit 221; secondary side first conversion sub-circuit 222;

[0033] First EMI circuit 3; second EMI circuit 4; first switch 5; second switch 6;

[0034] Vehicle 11. DETAILED DESCRIPTION

[0035] The embodiments of the present utility model are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present utility model are described in detail below.

[0036] Reference below Figures 1 to 5 The vehicle-mounted integrated circuit according to the embodiment of the utility model is described.

[0037] Figure 1 Schematic diagram of a vehicle-mounted integrated circuit according to an embodiment of the utility model. Figure 1 As shown, the on-vehicle integrated circuit 10 of the utility model mainly includes: at least two OBC circuits 2.

[0038] At least two OBC circuits 2 are connected in parallel to charge the device to be charged in a charging state and / or a discharging state.

[0039] In an embodiment, Figure 2As shown, it is a schematic diagram of a three-phase input vehicle integrated circuit of an embodiment of the utility model. If the power required by the device to be charged is relatively large, a three-phase input high-power OBC circuit 2 can be used. The three-phase input high-power OBC circuit 2 can be used to charge the device to be charged, such as a power battery. For example, if the charging power requires 10KW of power, if the power of each OBC circuit 2 is 3.3KW, three OBC circuits 2 can be selected in parallel to achieve the 10KW charging demand. Similarly, the 10KW charging power demand can be expanded to a single-phase power supply.

[0040] like Figure 3 The figure shows a schematic diagram of a vehicle charging circuit with a single-phase power input according to an embodiment of the utility model. Single-phase power input and three-phase power input can meet the vehicle power requirements and reduce the development difficulty, cycle and cost.

[0041] For example, Figure 4 The figure shows a schematic diagram of a vehicle-mounted integrated circuit with a single-phase power input of an embodiment of the utility model. The charging power required is different, and the number of OBC circuits 2 connected is different. If the charging power required is 6.6KW, three OBC circuits 2 can be selected in parallel, or two OBC circuits 2 can be selected in parallel. When three OBC circuits 2 are selected in parallel, the power of each OBC circuit 2 is 2.2KW, and when two OBC circuits 2 are selected in parallel, the power of each OBC circuit 2 is 3.3KW. By modifying the control circuit, 6.6KW can be expanded to single-phase power input and three-phase power input. Different numbers of OBC circuits 2 can be connected according to the power requirements, and the circuit can be flexibly expanded.

[0042] On the other hand, by connecting at least two OBC circuits 2 in parallel, for example, two or three OBC circuits 2 in parallel, when one of the OBC circuits 2 fails, the remaining healthy OBC circuits 2 can still charge the device to be charged, avoiding problems such as inability to charge or breakdown caused by failure of the OBC circuit 2, thereby improving the reliability of vehicle charging as well as the safety of vehicle driving and user experience.

[0043] Therefore, the above-mentioned on-vehicle integrated circuit, by connecting multiple OBC circuits in parallel, can meet the different power requirements of the vehicle by increasing or decreasing the number of parallel OBC circuits. In addition, by connecting the OBC circuits in parallel, if one of the OBC circuits fails, the remaining fault-free OBC circuits can continue to work, avoiding charging failure of the entire vehicle caused by partial circuit failure, so that the charging function will not be completely lost, thereby improving the charging reliability and fault tolerance of the vehicle, and then improving the driving safety and user experience of the vehicle. At the same time, there is no need to use an additional on-board power supply, which reduces the vehicle cost and the weight of the entire vehicle.

[0044] In one embodiment of the present invention, Figure 5 As shown, the device to be charged includes a first device to be charged, and each OBC circuit 2 includes: a PFC conversion subcircuit 21, one end of the PFC conversion subcircuit 21 is connected to the AC charging port; a voltage conversion subcircuit 22, one end of the voltage conversion subcircuit 22 is connected to the other end of the PFC conversion subcircuit 21, and the other end of the voltage conversion subcircuit 22 is connected to the first device to be charged.

[0045] In an embodiment, the first device to be charged is, for example, a power battery. One end of the PFC conversion subcircuit 21 is connected to the AC charging port, and then connected to the first device to be charged through the voltage conversion subcircuit 22, thereby realizing the charging function of the first device to be charged, such as a power battery.

[0046] Specifically, if Figure 5 As shown, there are three single modules in the circuit, namely module 1, module 2 and module 3. The specific number of single modules required depends on the power demand of the vehicle, and the working process of each single module in the forward operation, such as charging the power battery, is the same. For charging the power battery, for example, the external AC power passes through the PFC conversion sub-circuit 21, and the PFC conversion sub-circuit 21 filters the AC power and converts it into a high-voltage DC signal for output. The voltage conversion sub-circuit 22 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC signal output by the PFC conversion sub-circuit 21 and convert it into a high-voltage DC charging signal to charge the power battery, thereby realizing the charging function of the OBC circuit for the power battery.

[0047] Alternatively, working in reverse, that is, the OBC circuit 2 charges the device to be charged in the discharge state, for example, when the OBC circuit 2 charges the device to be charged, such as an external load, the voltage conversion subcircuit 22 is used to receive the high-voltage DC charging signal of the power battery and output a high-voltage DC signal. The other end of the voltage conversion subcircuit 22 is connected to one end of the PFC conversion subcircuit 21, so that the PFC conversion subcircuit 21 receives the high-voltage DC signal and outputs an AC power supply signal for charging the external load, thereby realizing the charging function of the OBC circuit for the external load.

[0048] In one embodiment of the present invention, Figure 5 As shown, the voltage conversion subcircuit 22 includes: a primary side conversion subcircuit 221, one end of the primary side conversion subcircuit 221 is connected to the other end of the PFC conversion subcircuit 21; a secondary side first conversion subcircuit 222, one end of the secondary side first conversion subcircuit 222 is connected to the other end of the primary side conversion subcircuit 221, and the other end of the secondary side first conversion subcircuit 222 is connected to the first device to be charged.

[0049] In an embodiment, Figure 5As shown, the voltage conversion subcircuit 22 includes a primary conversion subcircuit 221 and a secondary first conversion subcircuit 222, wherein one end of the primary conversion subcircuit 221 is connected to the other end of the PFC conversion subcircuit 21, the primary conversion subcircuit 221 can receive the high-voltage DC signal output by the PFC conversion subcircuit 21, and convert it into an AC square wave signal, one end of the secondary first conversion subcircuit 222 is connected to the other end of the primary conversion subcircuit 221, the secondary first conversion subcircuit 222 can receive the AC square wave signal converted by the primary conversion subcircuit 221, and convert it into a high-voltage DC charging signal, and then connected to the first device to be charged, for charging the first device to be charged.

[0050] For example, Figure 5 As shown, when the OBC circuit 2 charges the power battery, the AC power supply outputs a high-voltage DC signal through the PFC conversion sub-circuit 21, one end of the PFC conversion sub-circuit 21 is connected to the primary conversion sub-circuit 221, the primary conversion sub-circuit 221 receives the high-voltage DC signal and outputs an AC square wave signal, the primary conversion sub-circuit 221 is connected to the secondary first conversion sub-circuit 222 through the magnetic integrated transformer 24, so that the secondary first conversion sub-circuit 222 receives the AC square wave signal and converts it into a high-voltage DC charging signal for charging the power battery.

[0051] When the OBC circuit 2 charges the external load, the high-voltage DC charging signal of the power battery passes through the secondary-side first conversion sub-circuit 222. The secondary-side first conversion sub-circuit 222 receives the high-voltage DC charging signal and outputs an AC square wave electrical signal. The secondary-side first conversion sub-circuit 222 is connected to the primary-side conversion sub-circuit 221 via the magnetic integrated transformer 24. The primary-side conversion sub-circuit 221 receives the AC square wave electrical signal output by the secondary-side first conversion sub-circuit 222, outputs a high-voltage DC signal, and is then connected to the PFC conversion sub-circuit 21. The PFC conversion sub-circuit 21 receives the high-voltage DC signal and outputs an AC power supply signal for powering the external load.

[0052] In this way, the conversion of high-voltage direct current and the output of charging signals can be achieved to meet the power requirements of the vehicle. In addition, multiple OBC circuits are connected in parallel. Even if one of the modules fails, the other circuits can continue to work, which improves the reliability of vehicle charging and reduces costs.

[0053] In one embodiment of the present invention, Figure 5As shown, the device to be charged also includes a second device to be charged, and each OBC circuit 2 also includes: a secondary side second conversion subcircuit 23, one end of the secondary side second conversion subcircuit 23 is connected to the other end of the primary side conversion subcircuit 221, and the other end of the secondary side second conversion subcircuit 23 is connected to the second device to be charged, so as to cooperate with the primary side conversion subcircuit or the secondary side first conversion subcircuit to realize the DCDC conversion function, and charge the second device to be charged in the charging state and / or the discharging state.

[0054] In an embodiment, Figure 5 As shown, the second device to be charged, such as a battery, is integrated with the secondary side second conversion subcircuit 23 in the OBC circuit 2. In the charging state, the secondary side second conversion subcircuit 23 cooperates with the primary side conversion subcircuit 221 to realize the charging function of the DCDC conversion subcircuit, which is the charging function of the battery, and, in the discharging state, the secondary side second conversion subcircuit 23 cooperates with the secondary side first conversion subcircuit 222 to realize the charging of the second charging device to be charged, such as an external power load, thereby realizing the charging function of the DCDC conversion circuit for the second device to be charged in the charging state and / or the discharging state.

[0055] In other embodiments, Figure 5 As shown, when the forward operation of the DCDC conversion function is realized, for example, when charging a battery, the external AC power passes through the PFC conversion subcircuit 21, and the primary conversion subcircuit 221 is connected to the PFC conversion subcircuit 21 to receive the high-voltage DC power signal output by the PFC conversion subcircuit 21, and convert it into an AC square wave electrical signal for output, and the secondary second conversion subcircuit 23 is connected to the primary conversion subcircuit 221 through the magnetic integrated transformer 24, and the secondary second conversion subcircuit 23 can receive the AC square wave electrical signal output by the primary conversion subcircuit 221, and convert it into a low-voltage DC charging signal, thereby realizing the DCDC charging function for the battery.

[0056] For example, when the DCDC conversion circuit charges an external power load, the high-voltage DC charging signal of the power battery passes through the secondary side first conversion sub-circuit 222, the secondary side first conversion sub-circuit 222 receives the high-voltage DC charging signal, and converts it into an AC square wave electrical signal for output, the secondary side first conversion sub-circuit 222 is connected to the secondary side second conversion sub-circuit 23 through the magnetic integrated transformer 24, so that the secondary side second conversion sub-circuit 23 can receive the AC square wave electrical signal output by the secondary side first conversion sub-circuit 222, and output a low-voltage DC power supply signal for charging the external power load, thereby realizing the DCDC charging function for the external power load.

[0057] In a specific embodiment, Figure 5The figure shows a schematic diagram of a three-phase input vehicle integrated circuit of an embodiment of the utility model. The charging power required is different, and the number of OBC circuits 2 connected is different. If the charging power required is 3KW, two OBC circuits 2 can be selected in parallel, or three OBC circuits 2 can be selected in parallel. When two OBC circuits 2 are selected in parallel, the power of each OBC circuit 2 is 1.5KW, and when three OBC circuits 2 are selected in parallel, the power of each OBC circuit 2 is 1KW. By modifying the control circuit, 3KW can be expanded to three-phase power input and single-phase power input. Different numbers of OBC circuits 2 can be connected according to the power requirements, and the circuit can be flexibly expanded.

[0058] On the other hand, by connecting at least two OBC circuits 2 in parallel, for example, two or three OBC circuits 2 in parallel, when one of the OBC circuits 2 fails, the remaining healthy OBC circuits 2 can still charge the second device to be charged, such as a battery, thereby avoiding problems such as failure to charge or breakdown caused by failure of the OBC circuit 2, thereby improving the reliability of vehicle charging as well as the safety of vehicle driving and user experience.

[0059] In one embodiment of the present invention, Figure 5 As shown, each OBC circuit 2 also includes: a magnetic integrated transformer 24, the primary winding of the magnetic integrated transformer 24 is connected to the other end of the primary side conversion sub-circuit 221, the secondary first winding of the magnetic integrated transformer 24 is connected to one end of the secondary side first conversion sub-circuit 222, and the secondary second winding of the magnetic integrated transformer 24 is connected to one end of the secondary side second conversion sub-circuit 23.

[0060] For example, when the OBC circuit 2 charges the first device to be charged, the external AC power passes through the PFC conversion sub-circuit 21, and the PFC conversion sub-circuit 21 converts the filtered AC power into a high-voltage DC signal output. One end of the primary conversion sub-circuit 221 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC signal and convert it into an AC square wave signal output. The other end of the primary conversion sub-circuit 221 is connected to the primary winding of the magnetic integrated transformer 24, and then connected to the secondary first conversion sub-circuit 222 through the secondary first winding of the magnetic integrated transformer 24. The secondary first conversion sub-circuit 222 can receive the AC square wave signal output by the primary conversion sub-circuit 221, and output a high-voltage DC charging signal, thereby realizing the charging function of the OBC circuit for the first device to be charged.

[0061] Alternatively, when the OBC circuit 2 charges an external load, the secondary side first conversion subcircuit 222 is connected to the first device to be charged to receive a high-voltage DC charging signal output by the first device to be charged, and then connected to the primary side conversion subcircuit 221 through the magnetic integrated transformer 24. The primary side conversion subcircuit 221 receives the high-voltage DC charging signal output by the secondary side first conversion subcircuit 222 and converts it into an AC power supply signal to realize the charging function of the OBC circuit for the external load. On the other hand, when charging the second device to be charged, the external AC power passes through the PFC conversion sub-circuit 21, and the PFC conversion sub-circuit 21 converts the filtered AC power into a high-voltage DC signal output. One end of the primary conversion sub-circuit 221 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC signal and convert it into an AC square wave signal output, and the other end is connected to the primary winding of the magnetic integrated transformer 24, and then connected to the secondary second conversion sub-circuit 23 through the secondary second winding of the magnetic integrated transformer 24. It can receive the AC square wave signal output by the primary conversion sub-circuit 221 and output a low-voltage DC charging signal, thereby realizing the DCDC charging function for the second device to be charged, such as a battery.

[0062] Alternatively, when the DCDC conversion circuit charges the electrical load, the secondary side first conversion sub-circuit 222 receives the high-voltage DC charging signal output by the first device to be charged, and outputs an AC square wave electrical signal. One end of the secondary side first conversion sub-circuit 222 is connected to the secondary first winding of the magnetic integrated transformer 24, and then connected to the secondary side second conversion sub-circuit 23 through the secondary second winding of the magnetic integrated transformer 24, so that the secondary side second conversion sub-circuit 23 converts the AC square wave electrical signal into a low-voltage DC power supply signal, thereby realizing the charging function of the DCDC conversion circuit for the electrical load.

[0063] In one embodiment of the present invention, during the charging process, Figure 5 As shown, the vehicle integrated circuit 10 further includes: a first EMI circuit 3 , one end of the first EMI circuit 3 is connected to the AC charging port, and the other end of the first EMI circuit 3 is connected to one end of the PFC conversion sub-circuit 21 .

[0064] In the embodiment, one end of the first EMI circuit 3 is connected to the AC charging port for receiving AC charging and filtering out interference signals, and the other end of the first EMI circuit 3 is connected to the PFC conversion subcircuit 21, thereby realizing the charging function for the vehicle.

[0065] For example, Figure 5As shown, when the circuit works in the forward direction, for example, when the DCDC conversion circuit charges the battery, the external AC power passes through the first EMI circuit 3 to filter out interference signals, and then passes through the PFC conversion sub-circuit 21. One end of the primary conversion sub-circuit 221 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC power signal output by the PFC conversion sub-circuit 21, and converts it into an AC square wave electrical signal for output. The other end of the primary conversion sub-circuit 221 is connected to the primary winding of the magnetic integrated transformer 24, and the secondary second winding of the magnetic integrated transformer 24 is connected to the secondary second conversion sub-circuit 23. The secondary second conversion sub-circuit 23 can receive the AC square wave electrical signal output by the primary conversion sub-circuit 221, and convert it into a low-voltage DC charging signal, thereby realizing the charging function of the DCDC conversion circuit for the battery.

[0066] Alternatively, when the DCDC conversion circuit charges the electrical load, the secondary side first conversion sub-circuit 222 receives the high-voltage DC charging signal output by the first device to be charged, and outputs an AC square wave electrical signal. The other end of the secondary side first conversion sub-circuit 222 is connected to the secondary first winding of the magnetic integrated transformer 24, and then magnetically connected to the secondary side second conversion sub-circuit 23 through the secondary second winding of the magnetic integrated transformer 24. The secondary side second conversion sub-circuit 23 converts the AC square wave electrical signal into a low-voltage DC power supply signal, thereby realizing the charging function of the DCDC conversion circuit for the electrical load.

[0067] On the other hand, when the OBC circuit 2 charges the power battery, the external AC power passes through the first EMI circuit 3 to filter out interference signals, and then passes through the PFC conversion sub-circuit 21. The primary conversion sub-circuit 221 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC power signal output by the PFC conversion sub-circuit 21, and converts it into an AC square wave electrical signal for output. The secondary first conversion sub-circuit 222 is connected to the primary conversion sub-circuit 221 through the magnetic integrated transformer 24, receives the AC square wave electrical signal output by the primary conversion sub-circuit 221, and converts it into a high-voltage DC charging signal, thereby realizing the charging function of the OBC circuit for the power battery.

[0068] Alternatively, when the OBC circuit charges an external load, one end of the secondary side first conversion subcircuit 222 is connected to the first device to be charged to receive the high-voltage DC charging signal output by the first device to be charged, and the other end of the secondary side first conversion subcircuit 222 is connected to the secondary first winding of the magnetic integrated transformer 24, and then magnetically connected to the primary side conversion subcircuit 221 through the primary winding of the magnetic integrated transformer 24. The primary side conversion subcircuit 221 is then connected to the PFC conversion subcircuit 21 to convert the high-voltage DC power signal into an AC power supply signal. The interference signal is filtered out by the first EMI circuit 3, so that the OBC circuit can realize the charging function of the external load.

[0069] In one embodiment of the present invention, during the charging process, Figure 5 As shown, the on-board integrated circuit 10 further includes: a second EMI circuit 4, one end of the second EMI circuit 4 is connected to the other end of the secondary side first conversion sub-circuit 222, and the other end of the second EMI circuit 4 is connected to the first device to be charged.

[0070] In an embodiment, Figure 5 As shown, one end of the second EMI circuit 4 is connected to the secondary side first conversion subcircuit 222 to filter out interference signals, and the other end of the second EMI circuit 4 is connected to the first device to be charged to realize the charging function of the first device to be charged.

[0071] For example, when the OBC circuit 2 charges the power battery, the external AC power passes through the first EMI circuit 3 to filter out interference signals, and then passes through the PFC conversion sub-circuit 21. The PFC conversion sub-circuit 21 converts the filtered AC power into a high-voltage DC signal for output. One end of the primary conversion sub-circuit 221 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC signal and convert it into an AC square wave signal for output. The other end of the primary conversion sub-circuit 221 is connected to the primary winding of the magnetic integrated transformer 24, and then connected to the secondary first conversion sub-circuit 222 through the secondary first winding of the magnetic integrated transformer 24. It can receive the AC square wave signal output by the primary conversion sub-circuit 221 and output a high-voltage DC charging signal. The secondary first conversion sub-circuit 222 is connected to the second EMI circuit 4, and the interference signal is filtered out through the second EMI circuit 4, thereby realizing the charging function of the OBC circuit for the power battery. Alternatively, when the OBC circuit 2 charges an external load, one end of the secondary side first conversion subcircuit 222 is connected to the first device to be charged through the second EMI circuit 4 to receive the high-voltage DC charging signal output by the first device to be charged, and the other end of the secondary side first conversion subcircuit 222 is connected to the secondary first winding of the magnetic integrated transformer 24, and then magnetically connected to one end of the primary side conversion subcircuit 221 through the primary winding of the magnetic integrated transformer 24, and the other end of the primary side conversion subcircuit 221 is connected to one end of the PFC conversion subcircuit 21 to convert the high-voltage DC charging signal into an AC power supply signal, and the interference signal is filtered out by the first EMI circuit 3, so that the OBC circuit can realize the charging function of the external load.

[0072] On the other hand, for example, when the DCDC conversion circuit charges the battery, the external AC power passes through the first EMI circuit 3 to filter out interference signals, and then passes through the PFC conversion sub-circuit 21, so that one end of the primary conversion sub-circuit 221 is connected to one end of the PFC conversion sub-circuit 21 to receive the high-voltage DC signal output by the PFC conversion sub-circuit 21, and convert it into an AC square wave signal for output, and the other end of the primary conversion sub-circuit 221 is connected to the primary winding of the magnetic integrated transformer 24, and is connected to the secondary second conversion sub-circuit 23 through the secondary second winding of the magnetic integrated transformer 24, so that the secondary second conversion sub-circuit 23 receives the AC square wave signal output by the primary conversion sub-circuit 221, and converts it into a low-voltage DC charging signal, thereby realizing the charging function of the DCDC conversion circuit for the battery. Alternatively, when the DCDC conversion circuit charges the electrical load, one end of the secondary side first conversion sub-circuit 222 is connected to the first device to be charged through the second EMI circuit 4 to receive the high-voltage DC charging signal output by the first device to be charged and output an AC square wave electrical signal. The other end of the secondary side first conversion sub-circuit 222 is connected to the secondary first winding of the magnetic integrated transformer 24, and then magnetically connected to the secondary side second conversion sub-circuit 23 through the secondary second winding of the magnetic integrated transformer 24. The secondary side second conversion sub-circuit 23 converts the AC square wave electrical signal into a low-voltage DC power supply signal, thereby realizing the charging function of the DCDC conversion circuit for the electrical load.

[0073] In one embodiment of the present invention, Figure 5 As shown, the on-board integrated circuit 10 also includes: at least two first switches 5, at least two first switches 5 are arranged corresponding to at least two OBC circuits 2, one end of each first switch 5 is connected to the other end of the first EMI circuit 3, and the other end of each first switch 5 is connected to one end of the PFC conversion sub-circuit 21.

[0074] In the embodiment, the number of the first switches 5 may be set accordingly according to the number of OBC circuits 2 required, for example, Figure 5 There are three OBC circuits 2 , so three first switches 5 can be correspondingly provided, and the charging function of the vehicle is realized by controlling the OBC circuits 2 by turning on and off the first switches 5 .

[0075] For example, Figure 5As shown, when the OBC circuit 2 charges the power battery, the AC power passes through the first EMI circuit 3, and the first EMI circuit 3 can filter out interference signals. One end of the first EMI circuit 3 is connected to one end of the first switch 5, and then connected to the PFC conversion subcircuit 21 through the other end of the first switch 5. The PFC conversion subcircuit 21 converts the filtered AC power into a high-voltage DC signal for output. One end of the primary conversion subcircuit 221 is connected to the PFC conversion subcircuit 21 to receive the high-voltage DC signal and convert it into an AC square wave signal for output. The other end of the primary conversion subcircuit 221 is connected to the primary winding of the magnetic integrated transformer 24, and then connected to one end of the secondary first conversion subcircuit 222 through the secondary first winding of the magnetic integrated transformer 24, which can receive the AC square wave signal output by the primary conversion subcircuit 221 and output a high-voltage DC charging signal. The other end of the secondary first conversion subcircuit 222 is connected to the second EMI circuit 4, and the interference signal is filtered out through the second EMI circuit 4, so as to realize the charging function of the OBC circuit for the power battery. Alternatively, when the OBC circuit 2 charges an external load, one end of the secondary side first conversion subcircuit 222 is connected to the first device to be charged through the second EMI circuit 4 to receive the high-voltage DC charging signal output by the first device to be charged and output an AC square wave electrical signal. The other end of the secondary side first conversion subcircuit 222 is connected to the secondary first winding of the magnetic integrated transformer 24, and then connected to the primary side conversion subcircuit 221 through the primary winding of the magnetic integrated transformer 24 to receive the AC square wave electrical signal and convert the AC square wave electrical signal into a high-voltage DC electrical signal, and then pass through the PFC conversion subcircuit 21 to receive the output high-voltage DC charging signal and convert it into an AC power supply signal. The primary side conversion subcircuit 221 is connected to the first EMI circuit 3 through the first switch 5, and the first EMI circuit 3 is connected to the external AC power supply. By turning the first switch 5 on and off, the OBC circuit realizes the charging function of the external load.

[0076] On the other hand, when the DCDC conversion circuit charges the battery, the AC power passes through the first EMI circuit 3, and the first EMI circuit 3 can filter out interference signals. One end of the first EMI circuit 3 is connected to one end of the first switch 5, and then connected to the PFC conversion sub-circuit 21 through the other end of the first switch 5. The PFC conversion sub-circuit 21 converts the filtered AC power into a high-voltage DC signal for output. One end of the primary conversion sub-circuit 221 is connected to the PFC conversion sub-circuit 21 to receive the high-voltage DC signal and convert it into an AC square wave signal for output. The other end of the primary conversion sub-circuit 221 is connected to the primary winding of the magnetic integrated transformer 24, and then connected to the secondary second conversion sub-circuit 23 through the secondary second winding of the magnetic integrated transformer 24. It can receive the AC square wave signal output by the primary conversion sub-circuit 221 and output a low-voltage DC charging signal, thereby realizing the charging function of the DCDC conversion circuit for the battery.

[0077] Therefore, the first switch 5 is set corresponding to the OBC circuit 2, and the OBC circuit 2 can be controlled by controlling the on-off of the first switch 5 according to the power demand of the vehicle, for example, Figure 5 As shown in the schematic diagram of the on-board integrated circuit, if the required charging power is 6.6KW, three OBC circuits 2 can be selected in parallel, so three first switches 5 are set accordingly. When three OBC circuits 2 are selected in parallel, the power of each OBC circuit 2 is 2.2KW, and the three first switches 5 are controlled to be in a closed state; if the power required by the vehicle is 4.4KW, that is, when two OBC circuits 2 are selected in parallel, any one of the first switches 5 can be controlled to be in an open state. According to the power of each OBC circuit 2 being 2.2KW, the required power of the vehicle can be met, or, if one of the OBC circuits 2 fails, its corresponding first switch 5 can be controlled to be in an open state, and the first switch 5 corresponding to the OBC circuit 2 without fault is in a closed state, so that the other two OBC circuits 2 without fault continue to charge the vehicle. Therefore, by modifying the control circuit and adjusting the first switch according to the OBC circuit, the circuit can be flexibly expanded. By setting at least two first switches corresponding to at least two OBC circuits, when one of the OBC circuits fails, the remaining fault-free OBC circuits can still charge the device to be charged, avoiding problems such as inability to charge or breakdown caused by OBC circuit failure, thereby improving the reliability of vehicle charging as well as the safety of vehicle driving and user experience.

[0078] In one embodiment of the present invention, Figure 3 As shown, the on-board integrated circuit 10 also includes: at least two second switches 6, at least two second switches 6 are arranged corresponding to at least two OBC circuits 2, one end of each second switch 6 is connected to a point at the other end of the first EMI circuit 3, and the other end of each second switch 6 is connected to one end of the PFC conversion sub-circuit 21.

[0079] In an embodiment, Figure 3 As shown, the number of second switches 6 can be set accordingly according to the number of OBC circuits 2 required, for example, Figure 3 There are three OBC circuits 2 , so three second switches 6 can be correspondingly provided, and the OBC circuits 2 are controlled by turning on and off the second switches 6 to realize the charging function of the vehicle.

[0080] Specifically, one end of the second switch 6 is connected to the first EMI circuit 3, and the other end is connected to one end of the PFC conversion subcircuit 21. When the OBC circuit 2 charges the first device to be charged, the external AC power passes through the first EMI circuit 3 to filter out interference signals, and then is connected to the PFC conversion subcircuit 21 through the second switch 6. At least two second switches 6 are connected in parallel. Therefore, the charging function of the vehicle can be realized by controlling the opening or closing of the second switch 6. When one of the OBC circuits 2 fails, the corresponding second switch 6 can be controlled to be opened, so that the second switch 6 corresponding to the remaining OBC circuits 2 without faults is in a closed state, so that the OBC circuit 2 corresponding to the second switch 6 in the closed state can realize the charging function of the vehicle. Therefore, by modifying the control circuit and adjusting the second switch according to the OBC circuit, the circuit can be flexibly expanded. By setting at least two second switches corresponding to at least two OBC circuits, when one of the OBC circuits fails, the remaining OBC circuits without faults can still charge the device to be charged, avoiding the problems of being unable to charge or breaking down due to the failure of the OBC circuit, and improving the reliability of vehicle charging, the safety of vehicle driving and the user experience.

[0081] In summary, combined with Figure 5 As shown, the vehicle integrated circuit of the utility model mainly comprises a first EMI circuit 3, a second EMI circuit 4, a plurality of OBC circuits 2 and switches corresponding to the plurality of OBC circuits 2 to realize the charging function of the vehicle. The OBC circuit 2 charges the first device to be charged by setting a PFC conversion subcircuit 21 and a voltage conversion subcircuit 22. In addition, the OBC circuit 2 can also charge the second device to be charged by setting a secondary side second conversion subcircuit 23. During the working process of the circuit, the charging process of the first device to be charged, such as a power battery, and the charging process of the second device to be charged, such as a storage battery, can be understood as the forward working process of the vehicle integrated circuit 10, that is, the working process in the charging state. The process of charging the external load and the charging process of the power load can be understood as the reverse working process of the vehicle integrated circuit 10, that is, the working process in the discharge state.

[0082] According to the vehicle-mounted integrated circuit of the embodiment of the utility model, multiple OBC circuits are connected in parallel, and the conversion of high-voltage direct current and the output of charging signals are realized through a magnetic integrated transformer, so as to charge the device to be charged. By increasing or decreasing the number of parallel OBC circuits and the corresponding number of switches, the different power requirements of the vehicle can be met, the power requirements can be flexibly expanded, and the flexible selection of the AC input phase can also be realized. In addition, by adopting the parallel connection of OBC circuits, if one of the OBC circuits fails, the remaining fault-free OBC circuits can continue to work and provide charging for the required equipment, avoiding the charging failure of the whole vehicle caused by partial circuit failure, so that the charging function will not be completely lost, thereby improving the driving safety and user experience of the vehicle. At the same time, there is no need to use an additional on-board power supply, which reduces the vehicle cost and the weight of the whole vehicle.

[0083] Reference below Figure 6 A vehicle 11 according to an embodiment of the present invention is described.

[0084] Figure 6 1 is a structural block diagram of a vehicle according to an embodiment of the present utility model. Figure 6 As shown, the vehicle 11 of the present invention includes the on-board integrated circuit 10 as described in any one of the above embodiments of the present invention.

[0085] According to the vehicle 11 of the utility model, multiple OBC circuits are connected in parallel, and the conversion of high-voltage direct current and the output of charging signals are realized through a magnetic integrated transformer, so as to charge the device to be charged. By increasing or decreasing the number of parallel OBC circuits and the corresponding number of switches, the different power requirements of the vehicle can be met, the power requirements can be flexibly expanded, and the flexible selection of the AC input phase can be realized. In addition, by adopting the parallel connection of OBC circuits, if one of the OBC circuits fails, the remaining fault-free OBC circuits can continue to work, avoiding the charging failure of the whole vehicle caused by partial circuit failure, so that the charging function will not be completely lost, thereby improving the reliability and fault tolerance of the vehicle, and then improving the driving safety and user experience of the vehicle. At the same time, there is no need to use an additional on-board power supply, which reduces the vehicle cost and the weight of the whole vehicle.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0087] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vehicle-mounted integrated circuit, characterized in that: include: At least two OBC circuits are connected in parallel and are used to charge the device to be charged in a charging state and / or a discharging state.

2. The vehicle-mounted integrated circuit according to claim 1, characterized in that: The device to be charged includes a first device to be charged, and each of the OBC circuits includes: A PFC conversion sub-circuit, one end of which is connected to the AC charging port; A voltage conversion subcircuit, one end of the voltage conversion subcircuit is connected to the other end of the PFC conversion subcircuit, and the other end of the voltage conversion subcircuit is connected to the first device to be charged.

3. The vehicle-mounted integrated circuit according to claim 2, characterized in that: The voltage conversion subcircuit comprises: a primary side conversion sub-circuit, one end of which is connected to the other end of the PFC conversion sub-circuit; A secondary side first conversion subcircuit, one end of the secondary side first conversion subcircuit is connected to the other end of the primary side conversion subcircuit, and the other end of the secondary side first conversion subcircuit is connected to the first device to be charged.

4. The vehicle-mounted integrated circuit according to claim 3, characterized in that: The device to be charged further includes a second device to be charged, and each of the OBC circuits further includes: A secondary side second conversion subcircuit, one end of the secondary side second conversion subcircuit is connected to the other end of the primary side conversion subcircuit, and the other end of the secondary side second conversion subcircuit is connected to the second device to be charged, so as to cooperate with the primary side conversion subcircuit or the secondary side first conversion subcircuit to realize the DCDC conversion function, and charge the second device to be charged in the charging state and / or the discharging state.

5. The vehicle-mounted integrated circuit according to claim 4, characterized in that: Each of the OBC circuits further comprises: A magnetic integrated transformer, wherein the primary winding of the magnetic integrated transformer is connected to the other end of the primary conversion subcircuit, the secondary first winding of the magnetic integrated transformer is connected to one end of the secondary first conversion subcircuit, and the secondary second winding of the magnetic integrated transformer is connected to one end of the secondary second conversion subcircuit.

6. The vehicle-mounted integrated circuit according to claim 2, characterized in that: The vehicle-mounted integrated circuit further comprises: A first EMI circuit, wherein one end of the first EMI circuit is connected to the AC charging port, and the other end of the first EMI circuit is connected to one end of the PFC conversion sub-circuit.

7. The vehicle-mounted integrated circuit according to claim 3, characterized in that: The vehicle-mounted integrated circuit further comprises: A second EMI circuit, one end of the second EMI circuit is connected to the other end of the secondary side first conversion sub-circuit, and the other end of the second EMI circuit is connected to the first device to be charged.

8. The vehicle-mounted integrated circuit according to claim 6, characterized in that: The vehicle-mounted integrated circuit further comprises: At least two first switches are provided corresponding to at least two OBC circuits, one end of each first switch is connected to the other end of the first EMI circuit, and the other end of each first switch is connected to one end of the PFC conversion sub-circuit.

9. The vehicle-mounted integrated circuit according to claim 6, characterized in that: The vehicle-mounted integrated circuit further comprises: At least two second switches, at least two second switches are arranged corresponding to at least two OBC circuits, one end of each second switch is connected to a point at the other end of the first EMI circuit, and the other end of each second switch is connected to one end of the PFC conversion sub-circuit.

10. A vehicle, characterized in that: include: An on-vehicle integrated circuit as claimed in any one of claims 1 to 9.

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