Charging control system and vehicle

Abstract

The utility model provides a charging control system and a vehicle, the charging control system comprises a low-voltage control circuit, the first end of the low-voltage control circuit is connected with a photovoltaic assembly, and the low-voltage control circuit is used for converting power supply voltage into charging voltage of a first low-voltage battery of a first vehicle; the first end of the first switching circuit is connected with the third end of the low-voltage control circuit, the second end of the first switching circuit is connected with the first low-voltage battery, and the first switching circuit is used for switching on or switching off the first low-voltage power supply loop. The charging stability and safety of the charging control system are improved, the charging disorder phenomenon is avoided, and the vehicle damage probability is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a charging control system and a vehicle. Background Art

[0002] In related technologies, external electrical energy is used to power the battery on a vehicle, and a two-terminal DC charging device can also be used to power the battery of another vehicle. However, if a vehicle powers both its own battery and the battery of another vehicle at the same time, the output objects may be confused, causing charging disorder and resulting in damage to the vehicle. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, one purpose of the present invention is to propose a charging control system, which clarifies the output object through the conduction and shutdown of the first switching circuit, increases the charging stability and safety of the charging control system, avoids charging disorder, and reduces the probability of vehicle damage.

[0005] Therefore, a second object of the present invention is to provide a vehicle.

[0006] In order to achieve the above-mentioned purpose, an embodiment of the first aspect of the present utility model proposes a charging control system, which is used for a vehicle, and the vehicle includes a first vehicle. The charging control system includes: a low-voltage control circuit, the first end of the low-voltage control circuit is connected to the photovoltaic component, and is used to convert the power supply voltage into a charging voltage of a first low-voltage battery of the first vehicle; a first switching circuit, the first end of the first switching circuit is connected to the third end of the low-voltage control circuit, and the second end of the first switching circuit is connected to the first low-voltage battery, and is used to turn on or off the first low-voltage power supply circuit.

[0007] According to the charging control system of the embodiment of the present utility model, the power supply voltage of the first vehicle is converted into the charging voltage of the first low-voltage battery through the low-voltage DCDC conversion circuit, and a first switching circuit is provided between the low-voltage DCDC conversion circuit and the first low-voltage battery. When the first switching circuit turns on the first low-voltage power supply circuit, the output object is the first low-voltage battery; when the first switching circuit turns off the first low-voltage power supply circuit, the output object is other batteries. The output object is clearly defined by turning on and off the first switching circuit, thereby increasing the charging stability and safety of the charging control system, avoiding charging disorder, and reducing the probability of vehicle damage.

[0008] In some embodiments, the low-voltage control circuit includes: a controller, a first end of the controller is connected to the photovoltaic component, and is used to output a low-voltage charging control instruction and / or a high-voltage charging control instruction; a low-voltage DCDC conversion circuit, one end of the low-voltage DCDC conversion circuit is connected to the third end of the controller, and is used to convert the power supply voltage into the charging voltage of the first low-voltage battery when receiving the low-voltage charging control instruction.

[0009] In some embodiments, the charging control system further includes: a high-voltage DCDC conversion circuit, one end of the high-voltage DCDC conversion circuit is connected to the second end of the controller, and the other end of the high-voltage DCDC conversion circuit is connected to the first high-voltage DC charging port of the first vehicle, and is used to convert the power supply voltage into the charging voltage of the first high-voltage battery of the first vehicle when receiving the high-voltage charging control instruction.

[0010] In some embodiments, the vehicle also includes a second vehicle, and the charging control system also includes: a second switch subcircuit, the first end of the second switch subcircuit is connected to the second DC charging port of the second vehicle, and the second end of the second switch subcircuit is connected to the second low-voltage battery of the second vehicle, for turning on or off the second low-voltage power supply circuit.

[0011] In some embodiments, the charging control system further includes: a two-terminal DC charging device, one end of the two-terminal DC charging device is connected to the first DC charging port of the first vehicle, and the other end of the two-terminal DC charging device is connected to the second DC charging port of the second vehicle, for conducting the second low-voltage power supply circuit.

[0012] In some embodiments, the first vehicle includes: a first battery management system, one end of the first battery management system is connected to the other end of the high-voltage DCDC conversion circuit, and is used to control the power supply of the first high-voltage battery of the first vehicle and / or the power supply of the first low-voltage power supply circuit.

[0013] In some embodiments, the second vehicle includes: a second battery management system, one end of the second battery management system is connected to the third end of the second switch subcircuit, and is used to control the power supply of the second low-voltage power supply circuit.

[0014] In some embodiments, the charging control system further includes: a communication bus, one end of the communication bus is connected to the first battery management system, and the other end of the communication bus is connected to the second battery management system.

[0015] In some embodiments, the charging control system further includes: a photovoltaic component, which is connected to one end of the controller and is used to convert solar energy into the power supply voltage.

[0016] In order to achieve the above-mentioned object, an embodiment of a second aspect of the present invention provides a vehicle, which includes the charging control system described in the above-mentioned embodiment.

[0017] According to the vehicle of the embodiment of the present utility model, the power supply voltage of the first vehicle is converted into the charging voltage of the first low-voltage battery through the low-voltage DCDC conversion circuit, and a first switching circuit is provided between the low-voltage DCDC conversion circuit and the first low-voltage battery. When the first switching circuit turns on the first low-voltage power supply circuit, the output object is the first low-voltage battery; when the first switching circuit turns off the first low-voltage power supply circuit, the output object is other batteries. The output object is clearly defined by turning on and off the first switching circuit, thereby increasing the charging stability and safety of the charging control system, avoiding the occurrence of charging disorder, and reducing the probability of vehicle damage.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0020] Figure 1 1 is a schematic structural diagram of a charging control system according to an embodiment of the present utility model;

[0021] Figure 2 It is a structural block diagram of a vehicle according to one embodiment of the present utility model.

[0022] Reference numerals:

[0023] Charging control system 100;

[0024] a first vehicle 10;

[0025] Low voltage control circuit 101;

[0026] Low-voltage DCDC conversion circuit 1; first low-voltage battery 2; first switch circuit 3; high-voltage DCDC conversion circuit 4; first high-voltage battery 5;

[0027] a second vehicle 20;

[0028] Second switch subcircuit 6; second low-voltage battery 7;

[0029] A first battery management system 8; a second battery management system 9;

[0030] Controller 11; Photovoltaic component 12;

[0031] Vehicle 110. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0033] With the rapid growth of the world's population, traditional energy sources are gradually facing depletion. As a result, the number of new energy vehicles is also gradually increasing. As clean energy technologies different from traditional energy, solar photovoltaics and lithium-ion power batteries are increasingly attracting attention in the market and technology fields and are being integrated into electric vehicles. Conventional electric vehicle power distribution systems are divided into high-voltage batteries and low-voltage batteries. High-voltage batteries currently often use lithium-ion power batteries as energy storage components, while low-voltage batteries can use lead-acid batteries or lithium-ion battery packs as energy storage components. Both high-voltage and low-voltage batteries must be powered by external electricity, which mainly relies on the power grid. However, because the layout of charging piles is affected by geographical location, charging points are often only deployed in urban areas and on roads with high traffic volume of electric vehicles. It is difficult to deploy charging points in rural areas and wilderness areas with very low traffic volume of electric vehicles. This limitation, on the one hand, leads to an excessive dependence of electric vehicles on charging outlets, resulting in concerns about charging difficulties and driving range, and on the other hand, it reduces the popularity of electric vehicles in wild areas.

[0034] There are four main ways to charge and replenish the power batteries of new energy vehicles, namely fast charging using a DC charging pile, and slow charging using AC charging piles or on-board chargers. Both charging methods are limited by the layout of charging outlets or charging facilities and cannot meet the replenishment needs of new energy electric vehicles in the wild or in areas without charging facilities. There are also wireless charging and mobile replenishment. The main charging method for low-voltage batteries such as 12V or 24V batteries is to obtain electrical energy from the power battery through the on-board DC-DC (Direct Current) power supply.

[0035] The following combination Figure 1 The charging control system 100 according to the embodiment of the present invention is described as an example. The charging control system 100 according to the embodiment of the present invention is used in a vehicle, and the vehicle includes a first vehicle 10 .

[0036] like Figure 1 As shown, the charging control system 100 of the embodiment of the present utility model includes: a low voltage control circuit 101 and a first switch circuit 3, wherein,

[0037] The first end of the low-voltage control circuit 101 is connected to the photovoltaic component 12, and is used to convert the power supply voltage into the charging voltage of the first low-voltage battery 2 of the first vehicle 10; the first end of the first switching circuit 3 is connected to the third end of the low-voltage control circuit 101, and the second end of the first switching circuit 3 is connected to the first low-voltage battery 2, and is used to turn on or off the first low-voltage power supply circuit.

[0038] In an embodiment, after the low-voltage control circuit 101 of the first vehicle 10 is enabled, the power supply voltage of the first vehicle 10 is converted into the charging voltage of the first low-voltage battery 2 of the first vehicle 10; the first switching circuit 3 includes a K1 switch and a K2 switch, and a relay can also be used to implement the switching function of the K1 switch and the K2 switch. The first end of the K1 switch is connected to the third end of the low-voltage control circuit 101, and the second end of the K1 switch is connected to the first low-voltage battery 2. The same is true for the K2 switch. When the K1 switch and the K2 switch in the first switching circuit 3 are respectively connected to the b and d ends, the first low-voltage power supply circuit is turned on to realize power supply to the first low-voltage battery 2 of the first vehicle 10; when the K1 switch and the K2 switch in the first switching circuit 3 are respectively connected to the a and c ends, the first low-voltage power supply circuit is turned off, and the power supply circuit of the first low-voltage battery 2 of the first vehicle 10 is switched through the first switching circuit 3.

[0039] According to the charging control system 100 of the embodiment of the present utility model, the power supply voltage of the first vehicle 10 is converted into the charging voltage of the first low-voltage battery 2 through the low-voltage DCDC conversion circuit 1, and a first switching circuit 3 is provided between the low-voltage DCDC conversion circuit 1 and the first low-voltage battery 2. When the first switching circuit 3 turns on the first low-voltage power supply circuit, the output object is the first low-voltage battery 2; when the first switching circuit 3 turns off the first low-voltage power supply circuit, the output object is other batteries. The output object is clearly defined by turning on and off the first switching circuit 3, thereby increasing the charging stability and safety of the charging control system 100, avoiding charging disorder, and reducing the probability of vehicle damage.

[0040] In some embodiments, the low-voltage control circuit 101 includes: a controller 11 and a low-voltage DCDC conversion circuit 1, wherein a first end of the controller 11 is connected to the photovoltaic component 12 for outputting a low-voltage charging control instruction and / or a high-voltage charging control instruction; one end of the low-voltage DCDC conversion circuit 1 is connected to a third end of the controller 11 for converting the power supply voltage into a charging voltage of the first low-voltage battery 2 when receiving a low-voltage charging control instruction.

[0041] In an embodiment, the controller 11 is used to perform load management on the output of the power supply voltage of the first vehicle 10 to output corresponding low-voltage charging control instructions and / or high-voltage charging control instructions. For example, when it is necessary to power the high-voltage battery, a high-voltage charging control instruction is output; when it is necessary to power the low-voltage battery, a low-voltage charging control instruction is output. When the low-voltage DCDC conversion circuit 1 receives the low-voltage charging control instruction, the low-voltage DCDC conversion circuit 1 is enabled to convert the power supply voltage of the first vehicle 10 into the charging voltage of the first low-voltage battery 2 of the first vehicle 10, and charge and replenish the first low-voltage battery 2 through the DC charging circuit to realize power supply to the first low-voltage battery 2 of the first vehicle 10.

[0042] In some embodiments, the charging control system 100 also includes: a high-voltage DCDC conversion circuit 4, one end of the high-voltage DCDC conversion circuit 4 is connected to the second end of the controller 11, and the other end of the high-voltage DCDC conversion circuit 4 is connected to the first high-voltage DC charging port of the first vehicle 10, and is used to convert the power supply voltage into the charging voltage of the first high-voltage battery 5 of the first vehicle 10 when receiving a high-voltage charging control instruction.

[0043] In an embodiment, when the high-voltage DCDC conversion circuit 4 receives a high-voltage charging control instruction, the low-voltage DCDC conversion circuit 1 is turned off and the high-voltage DCDC conversion circuit 4 is enabled, and the power supply voltage of the first vehicle 10 is converted to a charging voltage of the first high-voltage battery 5 of the first vehicle 10, which is greater than the open-circuit voltage. The first high-voltage battery 5 is charged and replenished through a DC charging circuit to realize power supply to the first high-voltage battery 5 of the first vehicle 10. The controller 11, the low-voltage DCDC conversion circuit 1 and the high-voltage DCDC conversion circuit 4 can be integrated into a low-power integrated circuit of MPPT (Maximum Power Point Tracking), making it a core system module for realizing solar energy charging and replenishment of high-voltage batteries and low-voltage batteries.

[0044] In some embodiments, the vehicle also includes a second vehicle 20, and the charging control system 100 also includes: a second switch subcircuit 6, the first end of the second switch subcircuit 6 is connected to the second DC charging port of the second vehicle 20, and the second end of the second switch subcircuit 6 is connected to the second low-voltage battery 7 of the second vehicle 20, which is used to turn on or off the second low-voltage power supply circuit, and can provide power to the low-voltage batteries of other electric vehicles whose low-voltage batteries and power batteries are simultaneously out of power and are not near charging points or charging facilities, thereby reducing the chance of electric vehicles stalling.

[0045] In an embodiment, the second switch subcircuit 6 includes a K3 switch and a K4 switch. A relay can also be used to implement the switching function of the K3 switch and the K4 switch. The first end of the K3 switch is connected to the second DC charging port of the second vehicle 20, and the second end of the K3 switch is connected to the second low-voltage battery 7 of the second vehicle 20. The same is true for the K4 switch. When the K3 switch and the K4 switch in the second switch subcircuit 6 are respectively connected to the b and d ends, the second low-voltage power supply circuit is turned on to power the second low-voltage battery 7 of the second vehicle 20; when the K3 switch and the K4 switch in the second switch subcircuit 6 are respectively connected to the a and c ends, the second low-voltage power supply circuit is turned off, and the power supply circuit of the second low-voltage battery 7 of the second vehicle 20 is switched through the second switch subcircuit 6.

[0046] In some embodiments, the charging control system 100 further includes: a two-terminal DC charging device, one end of the two-terminal DC charging device being connected to the first DC charging port of the first vehicle, and the other end of the two-terminal DC charging device being connected to the second DC charging port of the second vehicle, for conducting a second low-voltage power supply circuit to reliably connect the first vehicle 10 and the second vehicle 20.

[0047] In some embodiments, the first vehicle 10 includes: a first battery management system 8, one end of the first battery management system 8 is connected to the other end of the high-voltage DCDC conversion circuit 4, and is used to control the power supply of the first high-voltage battery 5 of the first vehicle 10 and / or the power supply of the first low-voltage power supply circuit. The first battery management system 8 can serve as an output current source to determine whether one end of the two-terminal DC charging device is successfully connected to the first DC charging port, control the power supply voltage to supply power to the first high-voltage battery 5 of the first vehicle 10, or control the conduction of the first low-voltage power supply circuit so that the power supply voltage supplies power to the first low-voltage battery 2 of the first vehicle 10.

[0048] In some embodiments, the second vehicle 20 includes: a second battery management system 9, one end of the second battery management system 9 is connected to the third end of the second switch sub-circuit 6, and is used to control the power supply of the second low-voltage power supply circuit. The second battery management system 9 can act as a current receiver to determine whether the other end of the two-terminal DC charging device is successfully connected to the second DC charging port, and the first battery management system 8 actively guides the second battery management system 9. After determining that the two-terminal DC charging device is reliably connected, it controls the conduction of the second low-voltage power supply circuit so that the power supply voltage supplies power to the second low-voltage battery 7 of the second vehicle 20.

[0049] In some embodiments, the charging control system 100 also includes: a communication bus, one end of the communication bus is connected to the first battery management system 8, and the other end of the communication bus is connected to the second battery management system 9. The first battery management system 8 and the second battery management system 9 communicate and shake hands through the communication bus. The first battery management system sends its own charging voltage and charging current to the second battery management system 9 through the communication bus. The second battery management system 9 determines whether the charging voltage and charging current are appropriate. After the second vehicle 20 is ready, it charges and replenishes the second low-voltage battery 7 of the second vehicle 20 according to the power supply voltage.

[0050] In some embodiments, the charging control system 100 also includes: a photovoltaic component 12, which is connected to one end of the controller 11. The photovoltaic component 12 can be set on the first vehicle 10, such as a vehicle-mounted multi-string monocrystalline solar panel. When the first vehicle 10 is in good sunlight conditions, the vehicle-mounted multi-string monocrystalline solar panel receives sunlight and converts solar energy into the power supply voltage of the first vehicle 10. By using solar energy as an auxiliary energy source to charge and replenish the vehicle's high-voltage battery and low-voltage battery, the degree of restriction and dependence of new energy vehicles on charging outlets and charging facilities during user use can be reduced, thereby avoiding impact on travel.

[0051] According to the charging control system 100 of the embodiment of the present utility model, the power supply voltage of the first vehicle 10 is converted into the charging voltage of the first low-voltage battery 2 through the low-voltage DCDC conversion circuit 1, and a first switching circuit 3 is provided between the low-voltage DCDC conversion circuit 1 and the first low-voltage battery 2. When the first switching circuit 3 turns on the first low-voltage power supply circuit, the output object is the first low-voltage battery 2; when the first switching circuit 3 turns off the first low-voltage power supply circuit, the output object is other batteries. The output object is clearly defined by turning on and off the first switching circuit 3, thereby increasing the charging stability and safety of the charging control system 100, avoiding charging disorder, and reducing the probability of vehicle damage.

[0052] The following combination Figure 2 A vehicle 110 according to an embodiment of the present invention is described.

[0053] like Figure 2 As shown, the vehicle 110 according to the embodiment of the present invention includes the charging control system 100 according to the above embodiment.

[0054] According to the vehicle 110 of the embodiment of the present utility model, the power supply voltage of the first vehicle 10 is converted into the charging voltage of the first low-voltage battery 2 through the low-voltage DCDC conversion circuit 1, and a first switching circuit 3 is provided between the low-voltage DCDC conversion circuit 1 and the first low-voltage battery 2. When the first switching circuit 3 turns on the first low-voltage power supply circuit, the output object is the first low-voltage battery 2; when the first switching circuit 3 turns off the first low-voltage power supply circuit, the output object is other batteries. The output object is clarified by turning on and off the first switching circuit 3, thereby increasing the charging stability and safety of the charging control system 100, avoiding the occurrence of charging disorder, and reducing the probability of vehicle damage.

[0055] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0056] 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 purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A charging control system, characterized in that: For a vehicle, the vehicle including a first vehicle, the charging control system including: a low-voltage control circuit, a first end of the low-voltage control circuit being connected to the photovoltaic assembly and configured to convert a power supply voltage into a charging voltage for a first low-voltage battery of the first vehicle; A first switching circuit, wherein a first end of the first switching circuit is connected to a third end of the low-voltage control circuit, and a second end of the first switching circuit is connected to the first low-voltage battery, and is used to turn on or off the first low-voltage power supply circuit.

2. The charging control system according to claim 1, characterized in that: The low voltage control circuit comprises: a controller, a first end of the controller being connected to the photovoltaic assembly and configured to output a low-voltage charging control instruction and / or a high-voltage charging control instruction; A low-voltage DCDC conversion circuit, one end of which is connected to the third end of the controller, is used to convert the power supply voltage into the charging voltage of the first low-voltage battery when receiving the low-voltage charging control instruction.

3. The charging control system according to claim 2, characterized in that: The charging control system further includes: a high-voltage DC-DC conversion circuit, one end of the high-voltage DC-DC conversion circuit being connected to the second end of the controller, and the other end of the high-voltage DC-DC conversion circuit being connected to the first high-voltage DC charging port of the first vehicle, for converting the power supply voltage into a charging voltage of the first high-voltage battery of the first vehicle upon receiving the high-voltage charging control instruction.

4. The charging control system according to claim 3, characterized in that: The vehicle further includes a second vehicle, and the charging control system further includes: A second switch subcircuit, wherein a first end of the second switch subcircuit is connected to a second DC charging port of the second vehicle, and a second end of the second switch subcircuit is connected to a second low-voltage battery of the second vehicle, and is used to turn on or off the second low-voltage power supply circuit.

5. The charging control system according to claim 4, characterized in that: The charging control system further includes: A two-terminal DC charging device, one end of which is connected to the first DC charging port of the first vehicle, and the other end of which is connected to the second DC charging port of the second vehicle, for conducting the second low-voltage power supply circuit.

6. The charging control system according to claim 3, characterized in that: The first vehicle comprises: A first battery management system, one end of which is connected to the other end of the high-voltage DCDC conversion circuit, and is used to control the power supply of the first high-voltage battery of the first vehicle and / or the power supply of the first low-voltage power supply circuit.

7. The charging control system according to claim 4, characterized in that: The second vehicle comprises: A second battery management system, one end of the second battery management system is connected to the third end of the second switch sub-circuit, and is used to control the power supply of the second low-voltage power supply circuit.

8. The charging control system according to claim 7, characterized in that: The charging control system further includes: A communication bus, one end of which is connected to the first battery management system, and the other end of which is connected to the second battery management system.

9. The charging control system according to claim 2, characterized in that: The charging control system further includes: A photovoltaic component is connected to one end of the controller and is used to convert solar energy into the power supply voltage.

10. A vehicle, characterized in that: include: A charging control system according to any one of claims 1 to 9.

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