Power supply method and device for electric vehicle and electric vehicle

Abstract

The present invention relates to the field of electric vehicles, and provides a power supply method, device and electric vehicle for electric vehicles, the method comprising: obtaining an operation signal of the electric vehicle; generating a first control instruction based on the operation signal and sending it to a corresponding first switch device; the first control instruction is used to control the closing or disconnection of the first switch device, and the closing or disconnection of the first switch device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electric equipment; wherein the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electric equipment. The present invention can effectively improve the charging efficiency while ensuring the reliability and comprehensive cost of the electric vehicle.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a power supply method and device for an electric vehicle and an electric vehicle. Background Art

[0002] With the continuous upgrading of environmental protection and emission requirements, the purchase cost of fuel vehicles continues to increase, and the user's use and maintenance costs are also increasing. Users need transportation tools that can meet environmental protection and emission requirements while being economical and efficient. Electric vehicles are one of the products that meet the above needs of customers.

[0003] However, "slow charging" is the core pain point of pure electric vehicles. At present, increasing the charging current or replacing the battery is usually used to increase the charging speed and shorten the charging time. However, pure electric vehicles have a large amount of electricity, and the current charging current has reached the current receiving current of the current national standard charging pile (400 amps). Increasing the charging current does not contribute much to shortening the charging time, and the current charging current has reached the limit current (400 amps) of the natural cooling of the charging system. Further increasing the charging current requires liquid cooling and other methods, which will lead to a significant increase in costs. In addition, due to the high cost of battery replacement and the large investment in the construction of battery replacement stations, the use of battery replacement will lead to a significant increase in costs. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a power supply method and device for an electric vehicle and an electric vehicle.

[0005] The present invention provides a power supply method for an electric vehicle, comprising:

[0006] Acquiring an operation signal of an electric vehicle;

[0007] A first control instruction is generated based on the operation signal, and the first control instruction is sent to the corresponding first switching device; the first control instruction is used to control the closing or opening of the first switching device, and the closing or opening of the first switching device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electrical equipment; wherein, the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electrical equipment, and the voltage platform of the first power battery group and the voltage platform of the second power battery group are the same as the voltage platform of the corresponding electrical equipment.

[0008] According to the power supply method for an electric vehicle provided by the present invention, the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the power consumption of each of the electrical devices of the electric vehicle; the capacity of the first power battery pack is greater than the capacity of the second power battery pack.

[0009] According to the power supply method for an electric vehicle provided by the present invention, the first power battery pack and the second power battery pack are charged by charging devices using different voltage platforms.

[0010] According to the power supply method for an electric vehicle provided by the present invention, the first power battery pack and the second power battery pack are charged by the following steps:

[0011] When it is determined to establish a communication connection with the charging device, a charging request instruction is sent to the charging device; wherein the charging request instruction includes a requested charging voltage corresponding to the first power battery pack or the second power battery pack;

[0012] receiving a charging voltage fed back by the charging device;

[0013] When it is determined that the voltage to be charged is consistent with the requested charging voltage, a second control instruction is generated and sent to the charging control switch; the second control instruction is used to control the closing of the charging control switch, and the closing or opening of the charging control switch is used to control the connection or disconnection of the charging circuit of the first power battery pack or the second power battery pack.

[0014] The power supply method for an electric vehicle provided by the present invention further includes:

[0015] Sending a detection instruction to each of the first switch devices and / or the charging control switch;

[0016] Based on a feedback signal of the first switching device and / or the charging control switch, a fault detection result of the first switching device and / or the charging control switch is determined.

[0017] According to the power supply method for an electric vehicle provided by the present invention, the generating of a first control instruction based on the operation signal and sending the first control instruction to a corresponding first switch device comprises:

[0018] When it is determined that the electrical device needs to be pre-charged, a pre-charging instruction is generated based on the operation signal, and the pre-charging instruction is sent to a second switch device of a pre-charging circuit of the electrical device, wherein the pre-charging instruction is used to control the closing of the second switch device; wherein the closing or opening of the second switch device is used to control the connection or disconnection of the pre-charging circuit;

[0019] When it is determined that the pre-charging of the electrical equipment is completed, a pre-charging end instruction and the first control instruction are generated, and the pre-charging end instruction is sent to the second switching device, and the first control instruction is sent to the corresponding first switching device. The pre-charging end instruction is used to control the second switching device to disconnect.

[0020] The present invention also provides a power supply device for an electric vehicle, comprising:

[0021] A data acquisition module, used for acquiring an operation signal of the electric vehicle;

[0022] A computing module, used to generate a first control instruction based on the operation signal, and send the first control instruction to the corresponding first switching device; the first control instruction is used to control the closing or opening of the first switching device, and the closing or opening of the first switching device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electrical equipment; wherein, the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electrical equipment, and the voltage platform of the first power battery group and the voltage platform of the second power battery group are the same as the voltage platform of the corresponding electrical equipment.

[0023] The present invention also provides an electric vehicle, comprising: a first power battery pack, a second power battery pack, an electric device, a first switch device and a control device;

[0024] The first power battery pack and the second power battery pack are respectively used to supply power to different electrical devices; wherein the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electrical device;

[0025] The control device is used to obtain an operation signal of the electric vehicle; it is also used to generate a first control instruction based on the operation signal, and send the first control instruction to the corresponding first switching device; the first control instruction is used to control the closing or opening of the first switching device, and the closing or opening of the first switching device is used to control the connection or disconnection of the power supply circuit of the first power battery pack and the second power battery pack with the corresponding electrical equipment.

[0026] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, a method for powering an electric vehicle as described in any one of the above is implemented.

[0027] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the method for powering an electric vehicle as described in any one of the above is implemented.

[0028] The power supply method, device and electric vehicle provided by the present invention obtain an operation signal of the electric vehicle, generate a first control instruction based on the operation signal, and send it to the corresponding first switch device to control the closing or opening of the first switch device, and control the first power battery pack or the second power battery pack to supply power or stop supplying power to the corresponding electrical equipment through the closing or opening of the first switch device, which can effectively ensure the normal and stable operation of the electric vehicle; at the same time, since the voltage platform of the first power battery pack is greater than the preset voltage, the charging efficiency of the electric vehicle can be effectively improved, and the voltage platform of the second power battery pack is less than or equal to the preset voltage, so that the electrical equipment corresponding to the second power battery pack adopts mass-produced mature equipment with high reliability and low comprehensive cost, thereby effectively improving the charging efficiency while ensuring the reliability and comprehensive cost of the electric vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is a schematic flow chart of a power supply method for an electric vehicle provided by the present invention;

[0031] Figure 2 It is a structural schematic diagram of a power supply device for an electric vehicle provided by the present invention;

[0032] Figure 3 is a schematic structural diagram of an electric vehicle provided by the present invention;

[0033] Figure 4 This is one of the structural schematic diagrams of the power supply system of the electric tractor provided by the present invention;

[0034] Figure 5 This is the second structural schematic diagram of the power supply system of the electric tractor provided by the present invention;

[0035] Figure 6 It is a structural schematic diagram of the electronic device provided by the present invention. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Combine the following Figure 1 The power supply method of the electric vehicle of the present invention is described. The power supply method of the electric vehicle of the present invention is executed by an electronic device such as a control device or the hardware and / or software therein. The control device can be the control device of the electric vehicle itself, such as a BMS (Battery Management System) controller, or a newly added control device. Figure 1 As shown, the power supply method of the electric vehicle of the present invention includes:

[0038] S101. Acquire an operation signal of an electric vehicle.

[0039] Specifically, an electric vehicle is a vehicle that uses a power battery as an energy source, such as an electric passenger car, an electric commercial vehicle, etc. The electric commercial vehicle is an electric tractor, an electric heavy truck, etc. The operation signal of the electric vehicle is a signal input by the user through the control components of the electric vehicle, such as a high-voltage power-on request signal, a driving request signal, a water cooling start signal, a water heating start signal, a battery pack heating request signal, and an air conditioning start signal.

[0040] S102. Generate a first control instruction based on the operation signal, and send the first control instruction to the corresponding first switch device; the first control instruction is used to control the closing or opening of the first switch device, and the closing or opening of the first switch device is used to control the connection or disconnection of the power supply circuit of the first power battery pack and the second power battery pack with the corresponding electrical equipment; wherein, the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used to power different electrical equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electrical equipment.

[0041] Specifically, the electric vehicle may include at least one first power battery pack and at least one second power battery pack, the first power battery pack and the second power battery pack are respectively used to supply power to different electric devices on the electric vehicle, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are respectively the same as the voltage platform of the corresponding electric devices. The first switch device is arranged on the power supply circuit of the first power battery pack and the second power battery pack and the corresponding electric device, and is used to control the connection or disconnection of the corresponding power supply circuit. When the power supply circuit is connected, the first power battery pack or the second power battery pack supplies power to the corresponding electric device, and when the power supply circuit is disconnected, the first power battery pack or the second power battery pack stops supplying power to the corresponding electric device.

[0042] The voltage platform of the first power battery pack is greater than the preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage. The specific value of the preset voltage can be set according to actual needs. As an optional implementation, the preset voltage can be set according to the voltage platform commonly used by electric vehicles on the market, for example, it can be set to 600 volts; the voltage platform of the first power battery pack is greater than the preset voltage, for example, it can be set to 1000 volts or higher, which can effectively increase the charging power of the first power battery pack, thereby shortening the charging time of the electric vehicle and improving the charging efficiency of the electric vehicle. The voltage platform of the second power battery pack can be equal to the preset voltage, for example, it can be set to 600 volts, that is, the electric equipment corresponding to the second power battery pack can adopt a mass-produced mature equipment with a 600-volt voltage platform, so that the reliability of the electric equipment is high and the comprehensive cost is effectively reduced, so that the reliability and comprehensive cost of the electric vehicle can be guaranteed while improving the charging efficiency. Among them, the first power battery pack and its corresponding electrical equipment are on a first voltage platform, the second power battery pack and its corresponding electrical equipment are on a second voltage platform, the first voltage platform and the second voltage platform are independent of each other, and there is no risk of electrical equipment failure caused by cross-circuiting even if the user makes an error operation.

[0043] It can be understood that, when a plurality of first power battery packs and a plurality of second power battery packs are included, the voltage platforms of the first power battery packs may be the same or different, and the voltage platforms of the second power battery packs may also be the same or different.

[0044] In addition, during the power supply process, the control device can also obtain the discharge current of the corresponding power battery pack to prevent damage to the corresponding electrical equipment due to abnormal discharge current.

[0045] The specific method of generating the first control instruction based on the operation signal can be set according to actual needs. For example, the vehicle can be self-checked after receiving the operation signal, and the corresponding first control instruction can be generated after determining that there is no abnormality; the electrical equipment can be pre-charged according to the needs of the electrical equipment after receiving the operation signal, and the corresponding first control instruction can be generated after the pre-charging is completed; the corresponding first control instruction can also be directly generated after receiving the operation signal.

[0046] Traditional methods usually use increasing charging current or battery replacement to increase charging speed and shorten charging time. However, pure electric vehicles carry a large amount of electricity, and the current charging current has reached the current current (400A) of the current national standard charging pile. Increasing the charging current does not contribute much to shortening the charging time. The current charging current has reached the limit current (400A) of natural cooling of the charging system. Further increasing the charging current requires the use of liquid cooling and other methods, which will greatly increase costs. In addition, due to the high cost of battery replacement and the large investment in the construction of battery replacement stations, the use of battery replacement will greatly increase costs.

[0047] The embodiment of the present invention obtains an operation signal of the electric vehicle, generates a first control instruction based on the operation signal, and sends it to the corresponding first switch device to control the closing or opening of the first switch device, and controls the first power battery pack or the second power battery pack to supply power or stop supplying power to the corresponding electrical equipment through the closing or opening of the first switch device, thereby effectively ensuring the normal and stable operation of the electric vehicle; at the same time, since the voltage platform of the first power battery pack is greater than the preset voltage, the charging efficiency of the electric vehicle can be effectively improved, and the voltage platform of the second power battery pack is less than or equal to the preset voltage, so that the electrical equipment corresponding to the second power battery pack adopts mass-produced mature equipment with high reliability and low overall cost, thereby effectively improving the charging efficiency while ensuring the reliability and overall cost of the electric vehicle.

[0048] Based on the above embodiment, the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the power consumption of each of the electrical devices of the electric vehicle; the capacity of the first power battery pack is greater than the capacity of the second power battery pack.

[0049] Specifically, the electrical equipment corresponding to the first power battery pack and the electrical equipment corresponding to the second power battery pack can be determined based on the power consumption of each electrical equipment of the electric vehicle, and then the capacity of the first power battery pack can be determined based on the power consumption of the electrical equipment corresponding to the first power battery pack, and the capacity of the second power battery pack can be determined based on the power consumption of the electrical equipment corresponding to the second power battery pack.

[0050] Among them, the specific method of determining the electric devices corresponding to the first power battery pack and the electric devices corresponding to the second power battery pack based on the power consumption of each electric device of the electric vehicle can be set according to actual needs, and it is sufficient to ensure that the capacity of the first power battery pack is greater than the capacity of the second power battery pack, so as to ensure that the electric vehicle meets the working condition requirements while reducing redundant power, and effectively improve the overall charging efficiency of the electric vehicle. For example, the electric devices with large power consumption, such as the driving motor, can be powered by the first power battery pack, so as to effectively improve the charging efficiency while ensuring that fewer electric devices are upgraded to the high-voltage platform; the electric devices on the high-voltage platform with relatively mature technology can also be powered by the first power battery pack to effectively improve the charging efficiency while ensuring the reliability of the electric devices; the electric devices powered by the first power battery pack can also be determined based on the power consumption of the electric devices and the technical maturity of the high-voltage platform electric devices. Taking an electric tractor as an example, the first power battery pack can be used to power the driving motor, and the second power battery pack can be used to power other electrical equipment, such as steering oil pumps, air pumps, three-in-one controllers, air conditioning compressors, water cooling units, water heaters, battery heating films, etc., so that the capacity of the first power battery pack accounts for more than 90% of the total power consumption of the electric vehicle, effectively improving the charging efficiency of the electric vehicle. Experiments have shown that when the first power battery pack uses a 1000V voltage platform and the second power battery pack uses the existing 600V voltage platform, the charging time can be shortened by more than 35%. At the same time, it is only necessary to upgrade the driving motor to the high voltage platform corresponding to the first power battery pack, and other electrical equipment still uses existing mass-produced electrical equipment with relatively mature technology, which has high reliability and low overall cost.

[0051] The embodiment of the present invention determines the capacity of the first power battery pack and the capacity of the second power battery pack based on the power consumption of each electrical device of the electric vehicle. It can reduce redundant power while ensuring that the electric vehicle meets the operating requirements, and ensures the reliability and comprehensive cost of the electric vehicle, thereby effectively improving the charging efficiency.

[0052] Based on any of the above embodiments, the first power battery pack and the second power battery pack are charged by charging devices using different voltage platforms.

[0053] Specifically, the first power battery pack and the second power battery pack are charged respectively by charging devices with different voltage platforms, that is, the voltage platform adopted by the charging device for charging the first power battery pack is consistent with the voltage platform of the first power battery pack, such as 1000 volts; the voltage platform adopted by the charging device for charging the second power battery pack is consistent with the voltage platform of the second power battery pack, such as 600 volts, thereby effectively ensuring the charging safety while improving the charging efficiency of the electric vehicle.

[0054] Based on any of the above embodiments, the first power battery pack and the second power battery pack are charged through the following steps:

[0055] When it is determined to establish a communication connection with the charging device, a charging request instruction is sent to the charging device; wherein the charging request instruction includes a requested charging voltage corresponding to the first power battery pack or the second power battery pack;

[0056] receiving a charging voltage fed back by the charging device;

[0057] When it is determined that the voltage to be charged is consistent with the requested charging voltage, a second control instruction is generated and sent to the charging control switch; the second control instruction is used to control the closing of the charging control switch, and the closing or opening of the charging control switch is used to control the connection or disconnection of the charging circuit of the first power battery pack or the second power battery pack.

[0058] Specifically, the first power battery pack and the second power battery pack are charged through different charging ports, that is, the electric vehicle includes charging ports corresponding to the first power battery pack and the second power battery pack. During the charging process, the charging plug of the charging device is inserted into the corresponding charging port to charge the first power battery pack and / or the second power battery pack.

[0059] The control device can collect the power of the first power battery pack and the second power battery pack in real time, and issue a charging reminder when the current is lower than a preset value; the user can insert the charging plug of the charging device into the charging port corresponding to the power battery pack to be charged according to the charging reminder information or charging requirements. After the charging plug is inserted into the charging port, the electric vehicle establishes a communication connection with the charging device. When the control device determines that a communication connection is established with the charging device, it sends a charging request to the charging device, and the charging request includes the requested charging voltage of the first power battery pack or the second power battery pack corresponding to the charging port. After receiving the charging request, the charging device feeds back the voltage to be charged to the control device of the electric vehicle; the voltage to be charged is the charging voltage that the charging device can provide. When the control device determines that the charging voltage fed back by the charging device is consistent with the requested charging voltage, it generates a second control instruction and sends it to the charging control switch to control the charging circuit of the first power battery pack or the second power battery pack corresponding to the charging port to be connected. Among them, the voltage to be charged is consistent with the requested charging voltage, that is, the difference between the voltage to be charged and the requested charging voltage is less than or equal to the preset voltage value. The charging control switch and the first switch device may overlap.

[0060] It is understandable that when the first power battery pack and the second power battery pack are charged simultaneously, charging request instructions may be sent to charging devices connected to corresponding charging ports respectively.

[0061] In addition, during the charging process, the control device can also obtain the charging current of the corresponding power battery pack to prevent damage to the corresponding power battery pack due to abnormal charging current.

[0062] When determining to establish a communication connection with the charging device, the embodiment of the present invention sends a request instruction including the requested charging voltage corresponding to the first power battery pack or the second power battery pack to the charging device, and receives the voltage to be charged fed back by the charging device, and generates a second control instruction to control the closing of the charging control switch when it is determined that the voltage to be charged is consistent with the requested charging voltage, thereby controlling the connection of the corresponding charging circuit, which can effectively avoid damage to the corresponding power battery packs caused by incorrect insertion of guns into the charging port corresponding to the first power battery pack and the charging port corresponding to the second power battery pack, thereby ensuring the safety of charging the first power battery pack and the second power battery pack.

[0063] Based on any of the above embodiments, it also includes:

[0064] Sending a detection instruction to each of the first switch devices and / or the charging control switch;

[0065] Based on a feedback signal of the first switching device and / or the charging control switch, a fault detection result of the first switching device and / or the charging control switch is determined.

[0066] Specifically, the fault detection result may include no fault and a specific fault type, such as a sticking fault and an open circuit fault. The detection instruction may be a current signal. For example, when the first switch device and / or the charging control switch is disconnected, a current signal may be sent to the corresponding first switch device and / or the charging control switch through the control device, and the current signal fed back by the first switch device and / or the charging control switch is 0, indicating that there is no sticking fault in the corresponding first switch device and / or the charging control switch, otherwise, there is a sticking fault; when the first switch device and / or the charging control switch is closed, a current signal may be sent to the corresponding first switch device and / or the charging control switch through the control device, and the current signal fed back by the first switch device and / or the charging control switch is 0, indicating that there is an open circuit fault in the corresponding first switch device and / or the charging control switch, otherwise, there is no open circuit fault.

[0067] It is understandable that fault detection can be performed when the vehicle high voltage is powered on, or it can be performed at preset time intervals according to actual needs.

[0068] The embodiment of the present invention sends a detection instruction to the first switch device and / or the charging control switch, and determines the fault detection result of the first switch device and / or the charging control switch based on the feedback signal of the first switch device and / or the charging control switch, so that when a fault occurs in the first switch device and / or the charging control switch, it can be discovered in time and corresponding measures can be taken, thereby ensuring the reliability of the operation of the electric vehicle and avoiding damage to electrical equipment.

[0069] Based on any of the above embodiments, generating a first control instruction based on the operation signal, and sending the first control instruction to the corresponding first switch device includes:

[0070] When it is determined that the electrical device needs to be pre-charged, a pre-charging instruction is generated based on the operation signal, and the pre-charging instruction is sent to a second switch device of a pre-charging circuit of the electrical device, wherein the pre-charging instruction is used to control the closing of the second switch device; wherein the closing or opening of the second switch device is used to control the connection or disconnection of the pre-charging circuit;

[0071] When it is determined that the pre-charging of the electrical equipment is completed, a pre-charging end instruction and the first control instruction are generated, and the pre-charging end instruction is sent to the second switching device, and the first control instruction is sent to the corresponding first switching device. The pre-charging end instruction is used to control the second switching device to disconnect.

[0072] Specifically, after receiving the operation signal, it can be determined whether the electrical equipment needs pre-charging. If pre-charging is required, the corresponding second switch device is first controlled to close to pre-charge the electrical equipment. After the pre-charging is completed, the second switch device is controlled to open, and the corresponding first switch device is controlled to close to supply power to the electrical equipment normally.

[0073] The specific method for determining whether an electrical device needs to be pre-charged can be set according to actual needs. For example, it can be determined based on the type of the electrical device, or the electrical devices that need to be pre-charged can be pre-defined and stored in the control device so that after receiving the operation signal, it can quickly and accurately determine whether the corresponding electrical device needs to be pre-charged.

[0074] The pre-charging circuit may include a second switch device and a pre-charging resistor, and the second switch device may overlap with the first switch device and the charging control switch. At the same time, the control device may also send a detection instruction to each second switch device, and determine the fault detection result of the second switch device based on the feedback signal of the second switch device.

[0075] The specific method for determining whether the pre-charging of the electrical equipment is completed can also be set according to actual needs. For example, the pre-charging can be determined to be completed when the voltage of the electrical equipment reaches a preset voltage (such as 95% U, U is the rated voltage of the electrical equipment), or when the pre-charging time reaches a preset time.

[0076] When the embodiment of the present invention determines that an electrical device needs to be pre-charged, a pre-charging instruction is generated based on an operation signal and sent to the second switch device of the pre-charging circuit of the electrical device to control the pre-charging circuit of the electrical device to be connected for pre-charging. After the pre-charging is completed, a pre-charging end instruction and a first control instruction are generated, and the pre-charging end instruction is sent to the second switch device of the pre-charging circuit of the electrical device, and the first control instruction is sent to the first switch device of the power supply circuit of the electrical device, thereby effectively ensuring the normal operation of each electrical device.

[0077] The power supply device of the electric vehicle provided by the present invention is described below. The power supply device of the electric vehicle described below and the power supply method of the electric vehicle described above can be referred to each other. Figure 2 As shown, the power supply device of the electric vehicle of the present invention comprises:

[0078] A data acquisition module 201 is used to acquire an operation signal of the electric vehicle;

[0079] The calculation module 202 is used to generate a first control instruction based on the operation signal and send the first control instruction to the corresponding first switch device; the first control instruction is used to control the closing or opening of the first switch device, and the closing or opening of the first switch device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electrical equipment; wherein, the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electrical equipment, and the voltage platform of the first power battery group and the voltage platform of the second power battery group are the same as the voltage platform of the corresponding electrical equipment.

[0080] Based on the above embodiment, the capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the power consumption of each of the electrical devices of the electric vehicle; the capacity of the first power battery pack is greater than the capacity of the second power battery pack.

[0081] Based on any of the above embodiments, the first power battery pack and the second power battery pack are charged by charging devices using different voltage platforms.

[0082] Based on any of the above embodiments, it further includes a charging module, wherein the charging module is used to:

[0083] When it is determined to establish a communication connection with the charging device, a charging request instruction is sent to the charging device; wherein the charging request instruction includes a requested charging voltage corresponding to the first power battery pack or the second power battery pack;

[0084] receiving a charging voltage fed back by the charging device;

[0085] When it is determined that the voltage to be charged is consistent with the requested charging voltage, a second control instruction is generated and sent to the charging control switch; the second control instruction is used to control the closing of the charging control switch, and the closing or opening of the charging control switch is used to control the connection or disconnection of the charging circuit of the first power battery pack or the second power battery pack.

[0086] Based on any of the above embodiments, it further includes a detection module, wherein the detection module is used to:

[0087] Sending a detection instruction to each of the first switch devices and / or the charging control switch;

[0088] Based on a feedback signal of the first switching device and / or the charging control switch, a fault detection result of the first switching device and / or the charging control switch is determined.

[0089] Based on any of the above embodiments, the calculation module 202 is specifically used for:

[0090] When it is determined that the electrical device needs to be pre-charged, a pre-charging instruction is generated based on the operation signal, and the pre-charging instruction is sent to a second switch device of a pre-charging circuit of the electrical device, wherein the pre-charging instruction is used to control the closing of the second switch device; wherein the closing or opening of the second switch device is used to control the connection or disconnection of the pre-charging circuit;

[0091] When it is determined that the pre-charging of the electrical equipment is completed, a pre-charging end instruction and the first control instruction are generated, and the pre-charging end instruction is sent to the second switching device, and the first control instruction is sent to the corresponding first switching device. The pre-charging end instruction is used to control the second switching device to disconnect.

[0092] The electric vehicle provided by the present invention is described below. The electric vehicle described below and the power supply method of the electric vehicle described above can be referred to each other. Figure 3 As shown, the electric vehicle of the present invention comprises: a first power battery pack 301, a second power battery pack 302, an electric device 303, a first switch device 304 and a control device 305;

[0093] The first power battery pack 301 and the second power battery pack 302 are respectively used to supply power to different power-consuming devices 303; wherein the voltage platform of the first power battery pack 301 is greater than a preset voltage, and the voltage platform of the second power battery pack 302 is less than or equal to the preset voltage; the voltage platform of the first power battery pack 301 and the voltage platform of the second power battery pack 302 are the same as the voltage platform of the corresponding power-consuming device 303;

[0094] The control device 305 is used to obtain an operation signal of the electric vehicle; it is also used to generate a first control instruction based on the operation signal, and send the first control instruction to the corresponding first switching device 304; the first control instruction is used to control the closing or opening of the first switching device 304, and the closing or opening of the first switching device 304 is used to control the connection or disconnection of the power supply circuit of the first power battery pack 301 and the second power battery pack 302 with the corresponding electrical equipment 303.

[0095] Specifically, electric vehicles are vehicles that use power batteries as energy sources, such as electric passenger cars, electric commercial vehicles, etc. Electric commercial vehicles include electric tractors, electric heavy trucks, etc.

[0096] It should be noted that the number of the first power battery pack 301 and the second power battery pack 302 can be one or more. Figure 3 In the figure, only one first power battery pack 301 and one second power battery pack 302 are used as an example.

[0097] The following takes an electric tractor as an example to describe in detail the specific implementation process of the power supply method for an electric vehicle of the present invention. Figure 4 As shown, the electrical equipment 303 includes: a driving motor 401, a steering oil pump 402, an air pump 403, a low-voltage battery 404, an air-conditioning compressor 405, a water cooling unit 406, a water heater 407, a first battery heating film 408 and a second battery heating film 409.

[0098] Among them, the driving motor 401 is connected to the first power battery pack 301 through the driving motor controller 410, the steering oil pump 402, the air pump 403 and the low-voltage battery 404 are connected to the second power battery pack 302 through the three-in-one controller 411, the first battery heating film 408 and the second battery heating film 409 are used to heat the first power battery pack 301 and the second power battery pack 302 respectively; the first power battery pack 301 is charged through the first charging port 412, and the second power battery pack 302 is charged through the second charging port 413; the first charging port 412 is used to connect a DC 800-1500 volt charging device, and the second charging port 413 is used to connect a DC 400-750 volt charging device.

[0099] A first manual maintenance switch MSD1 and a second switch K2 connected in series are provided between the positive electrode of the first power battery pack 301 and the positive electrode of the travel motor controller 410, and a first pre-charging branch connected in parallel with the second switch K2 is also provided, and the first pre-charging branch includes a third switch K3 and a first pre-charging resistor R1 connected in series; a first switch K1 is provided between the negative electrode of the first power battery pack 301 and the negative electrode of the travel motor controller 410; a fourth switch K4 is provided between the positive electrode of the first power battery pack 301 and the positive electrode of the first charging port 412, and the negative electrode of the first charging port 412 is connected to the negative electrode of the first power battery pack 301 through the first switch K1.

[0100] The positive electrode of the second power battery pack 302 is connected to the positive electrodes of the three-in-one controller 411, the air-conditioning compressor 405, the water-cooling unit 406, the water-heating heater 407, the first battery heating film 408, the second battery heating film 409 and the second charging port 413 through the fifth switch K5, and the negative electrode of the second power battery pack 302 is connected to the negative electrodes of the three-in-one controller 411, the air-conditioning compressor 405, the water-cooling unit 406, the water-heating heater 407, the first battery heating film 408, the second battery heating film 409 and the second charging port 413 through the sixth switch K6; a second manual maintenance switch MSD2 is also provided between the fifth switch K5 and the positive electrode of the second power battery pack 302; a fourth fuse F4 and an eighth switch K8 connected in series are provided between the fifth switch K5 and the positive electrode of the first battery heating film 408; the eighth switch K8 is connected to the positive electrode of the first battery heating film 408; the eighth switch K9 is connected to the positive electrode of the second power battery pack 302; the eighth switch K10 is connected to the positive electrode of the first battery heating film 408; the eighth switch K11 is connected to the positive electrode of the second power battery pack 302; the eighth switch K12 is connected to the positive electrode of the first battery heating film 408; the eighth switch K13 is connected to the positive electrode of the second power battery pack 302; the eighth switch K14 is connected to the positive electrode of the first battery heating film 408; the eighth switch K15 is connected to the positive electrode of the second power battery pack 302; the eighth switch K15 is connected to the positive electrode of the first battery heating film 408; the eighth switch K14 is connected to the positive electrode of the second power battery pack 302; the eighth switch K15 is connected to the positive electrode of A fifth fuse F5 and a ninth switch K9 connected in series are provided between the fifth switch K5 and the positive electrode of the second battery heating film 409; a first fuse F1 and an eleventh switch K11 connected in series are provided between the fifth switch K5 and the positive electrode of the air-conditioning compressor 405, and a second pre-charging branch is also provided, the second pre-charging branch is connected in parallel with the first fuse F1 and the eleventh switch K11, and the second pre-charging branch includes a tenth switch K10 and a second pre-charging resistor R2 connected in series; a second fuse F2 and a twelfth switch K12 connected in series are provided between the fifth switch K5 and the positive electrode of the water cooling unit 406; a third fuse F3 and a thirteenth switch K13 connected in series are provided between the fifth switch K5 and the positive electrode of the water heater 407; a seventh switch K7 is provided between the fifth switch K5 and the positive electrode of the second charging port 413. A first shunt FL1 is provided at the negative electrode of the first power battery pack 301, and a second shunt FL2 is provided at the negative electrode of the second power battery pack 302.

[0101] like Figure 5 As shown, the power supply system also includes a control device 305, which is electrically connected to the first switch K1 to the thirteenth switch K13 through a control line and a detection line, and is electrically connected to the first shunt FL1 and the second shunt FL2 through a detection line; the control device 305 is connected to the travel motor controller 410, the three-in-one controller 411, the air conditioning compressor 405, the water cooling unit 406, the water heater 407, the first battery heating film 408, the second battery heating film 409, the first charging port 412, the second charging port 413, the first power battery pack 301, the second power battery pack 302 and the vehicle controller 501 through a CAN bus. Among them, Figure 5 The dashed line represents the detection line, the single solid line represents the control line, and the double solid line represents the CAN bus.

[0102] The power supply process includes:

[0103] The control device 305 detects the high-voltage power-on request through the CAN bus and performs self-inspection. If there is no abnormality, the fifth switch K5 and the sixth switch K6 are closed, and the three-in-one controller 411 connects the high-voltage power to supply power to the steering oil pump 402, the air pump 403 and the low-voltage battery 404.

[0104] The control device 305 detects the driving request (the key is turned to the START position) through the CAN bus, first closes the first switch K1, and then closes the third switch K3, and charges the driving motor controller 410 through the first pre-charging resistor R1. When the bus voltage of the driving motor controller 410 meets the requirement, the pre-charging is completed, the second switch K2 is closed and the third switch K3 is opened, and the driving motor 401 can work according to the gear position and throttle position information of the electric vehicle.

[0105] According to the user's operation signal, the twelfth switch K12 can be closed to power the water cooling unit 406, the thirteenth switch K13 can be closed to power the water heating heater 407, the eighth switch K8 can be closed to power the first battery heating film 408, the ninth switch K9 can be closed to power the second battery heating film 409, and the tenth switch K10 can be closed to pre-charge the air-conditioning compressor 405 through the second pre-charging resistor R2. When the bus voltage of the air-conditioning compressor 405 meets the requirements, the pre-charging is completed, the eleventh switch K11 is closed and the tenth switch K10 is opened.

[0106] During the power supply process, the message signals of the driving motor controller 410, the three-in-one controller 411, the air conditioning compressor 405, the water cooling unit 406, the water heater 407, the first battery heating film 408, the second battery heating film 409, the first charging port 412, the second charging port 413, the first power battery pack 301, the second power battery pack 302 and the vehicle controller 501 are collected through the CAN bus to detect and display the status signals of the relevant power-consuming equipment 303 and determine whether charging is required. At the same time, the discharge current of the first power battery pack 301 and the second power battery pack 302 are respectively detected through the first shunt FL1 and the second shunt FL2 to disconnect the corresponding switch or issue an early warning when the discharge current is abnormal.

[0107] The charging process includes:

[0108] When the control device 305 determines to establish a communication connection with the charging device, it sends a charging request instruction to the charging device connected to the first charging port 412 and the charging device connected to the second charging port 413 respectively; the corresponding charging device feeds back the voltage to be charged to the control device 305, and the control device 305 compares the voltage to be charged fed back by the charging device connected to the first charging port 412 with the requested charging voltage corresponding to the first power battery pack 301. If they match, the first switch K1 and the fourth switch K4 are closed to charge the first power battery pack 301. At the same time, the voltage to be charged fed back by the charging device connected to the second charging port 413 is compared with the requested charging voltage corresponding to the second power battery pack 302. If they match, the fifth switch K5, the sixth switch K6 and the seventh switch K7 are closed to charge the second power battery pack 302, so as to prevent the user from plugging the charging plugs of the first charging port 412 and the second charging port 413 into the opposite direction to damage the electric vehicle.

[0109] During the charging process, the first shunt FL1 and the second shunt FL2 are used to detect the charging current of the first power battery pack 301 and the second power battery pack 302 respectively, so as to prevent the first power battery pack 301 and the second power battery pack 302 from being damaged by abnormal charging current.

[0110] Figure 6 An example of a physical structure diagram of an electronic device is shown in FIG. Figure 6 As shown, the electronic device may include: a processor (processor) 601, a communication interface (Communications Interface) 602, a memory (memory) 603 and a communication bus 604, wherein the processor 601, the communication interface 602, and the memory 603 communicate with each other through the communication bus 604. The processor 601 may call the logic instructions in the memory 603 to execute the power supply method of the electric vehicle, the method comprising: obtaining an operation signal of the electric vehicle;

[0111] A first control instruction is generated based on the operation signal, and the first control instruction is sent to the corresponding first switching device; the first control instruction is used to control the closing or opening of the first switching device, and the closing or opening of the first switching device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electrical equipment; wherein, the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electrical equipment, and the voltage platform of the first power battery group and the voltage platform of the second power battery group are the same as the voltage platform of the corresponding electrical equipment.

[0112] In addition, the logic instructions in the above-mentioned memory 603 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the prior art. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0113] On the other hand, the present invention further provides a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, the computer can execute the power supply method for an electric vehicle provided by the above methods, the method comprising: obtaining an operation signal of the electric vehicle;

[0114] A first control instruction is generated based on the operation signal, and the first control instruction is sent to the corresponding first switching device; the first control instruction is used to control the closing or opening of the first switching device, and the closing or opening of the first switching device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electrical equipment; wherein, the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electrical equipment, and the voltage platform of the first power battery group and the voltage platform of the second power battery group are the same as the voltage platform of the corresponding electrical equipment.

[0115] In another aspect, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program being implemented when executed by a processor to perform the above-mentioned power supply method for an electric vehicle, the method comprising: obtaining an operation signal of the electric vehicle;

[0116] A first control instruction is generated based on the operation signal, and the first control instruction is sent to the corresponding first switching device; the first control instruction is used to control the closing or opening of the first switching device, and the closing or opening of the first switching device is used to control the connection or disconnection of the power supply circuit of the first power battery group and the second power battery group with the corresponding electrical equipment; wherein, the voltage platform of the first power battery group is greater than a preset voltage, and the voltage platform of the second power battery group is less than or equal to the preset voltage; the first power battery group and the second power battery group are respectively used to power different electrical equipment, and the voltage platform of the first power battery group and the voltage platform of the second power battery group are the same as the voltage platform of the corresponding electrical equipment.

[0117] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0118] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for supplying power to an electric vehicle, characterized in that: include: Acquire an operation signal of the electric vehicle; the operation signal is a signal input by a user through a control component of the electric vehicle; generating a first control instruction based on the operation signal, and sending the first control instruction to a corresponding first switch device; The first control instruction is used to control the closing or opening of the first switch device, and the closing or opening of the first switch device is used to control the connection or disconnection of the power supply circuit of the first power battery pack and the second power battery pack with the corresponding power-consuming equipment; wherein, the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used to supply power to different power-consuming equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding power-consuming equipment; The first power battery pack and the second power battery pack are charged by the following steps: When it is determined to establish a communication connection with the charging device, a charging request instruction is sent to the charging device; wherein the charging request instruction includes a requested charging voltage corresponding to the first power battery pack or the second power battery pack; receiving a charging voltage fed back by the charging device; When it is determined that the voltage to be charged is consistent with the requested charging voltage, a second control instruction is generated, and the second control instruction is sent to the charging control switch; the second control instruction is used to control the closing of the charging control switch, and the closing or opening of the charging control switch is used to control the connection or disconnection of the charging circuit of the first power battery pack or the second power battery pack; Also includes: Sending a detection instruction to each of the first switch devices and / or the charging control switch; Based on a feedback signal of the first switching device and / or the charging control switch, a fault detection result of the first switching device and / or the charging control switch is determined.

2. The method for powering an electric vehicle according to claim 1, characterized in that: The capacity of the first power battery pack and the capacity of the second power battery pack are determined based on the power consumption of each of the power-consuming devices of the electric vehicle; the capacity of the first power battery pack is greater than the capacity of the second power battery pack.

3. The method for powering an electric vehicle according to claim 1, characterized in that: The first power battery pack and the second power battery pack are charged by charging devices using different voltage platforms.

4. The method for powering an electric vehicle according to claim 1, characterized in that: The generating a first control instruction based on the operation signal and sending the first control instruction to the corresponding first switch device includes: When it is determined that the electrical device needs to be pre-charged, a pre-charging instruction is generated based on the operation signal, and the pre-charging instruction is sent to a second switch device of a pre-charging circuit of the electrical device, wherein the pre-charging instruction is used to control the closing of the second switch device; wherein the closing or opening of the second switch device is used to control the connection or disconnection of the pre-charging circuit; When it is determined that the pre-charging of the electrical equipment is completed, a pre-charging end instruction and the first control instruction are generated, and the pre-charging end instruction is sent to the second switching device, and the first control instruction is sent to the corresponding first switching device. The pre-charging end instruction is used to control the second switching device to disconnect.

5. A power supply device for an electric vehicle, characterized in that: include: A data acquisition module, used for acquiring an operation signal of the electric vehicle; The operation signal is a signal input by the user through the control component of the electric vehicle; a calculation module, configured to generate a first control instruction based on the operation signal, and send the first control instruction to a corresponding first switch device; The first control instruction is used to control the closing or opening of the first switch device, and the closing or opening of the first switch device is used to control the connection or disconnection of the power supply circuit of the first power battery pack and the second power battery pack with the corresponding power-consuming equipment; wherein, the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the first power battery pack and the second power battery pack are respectively used to supply power to different power-consuming equipment, and the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding power-consuming equipment; A charging module, configured to send a charging request instruction to the charging device when determining to establish a communication connection with the charging device; wherein the charging request instruction includes a requested charging voltage corresponding to the first power battery pack or the second power battery pack; receive a voltage to be charged fed back by the charging device; when determining that the voltage to be charged is consistent with the requested charging voltage, generate a second control instruction, and send the second control instruction to a charging control switch; the second control instruction is used to control the closing of the charging control switch, and the closing or opening of the charging control switch is used to control the connection or disconnection of the charging circuit of the first power battery pack or the second power battery pack; A detection module is used to send a detection instruction to each of the first switching devices and / or the charging control switches; based on the feedback signal of the first switching device and / or the charging control switch, determine the fault detection result of the first switching device and / or the charging control switch.

6. An electric vehicle, characterized in that: include: A first power battery pack, a second power battery pack, an electrical device, a first switch device, and a control device; The first power battery pack and the second power battery pack are respectively used to supply power to different electrical devices; wherein the voltage platform of the first power battery pack is greater than a preset voltage, and the voltage platform of the second power battery pack is less than or equal to the preset voltage; the voltage platform of the first power battery pack and the voltage platform of the second power battery pack are the same as the voltage platform of the corresponding electrical device; The control device is used to obtain an operation signal of the electric vehicle; and is also used to generate a first control instruction based on the operation signal, and send the first control instruction to the corresponding first switch device; the first control instruction is used to control the closing or opening of the first switch device, and the closing or opening of the first switch device is used to control the connection or disconnection of the first power battery pack and the second power battery pack with the corresponding power supply circuit of the electric device; the operation signal is a signal input by the user through the control component of the electric vehicle; The first power battery pack and the second power battery pack are charged by the following steps: When it is determined to establish a communication connection with the charging device, a charging request instruction is sent to the charging device; wherein the charging request instruction includes a requested charging voltage corresponding to the first power battery pack or the second power battery pack; receiving a charging voltage fed back by the charging device; When it is determined that the voltage to be charged is consistent with the requested charging voltage, a second control instruction is generated, and the second control instruction is sent to the charging control switch; the second control instruction is used to control the closing of the charging control switch, and the closing or opening of the charging control switch is used to control the connection or disconnection of the charging circuit of the first power battery pack or the second power battery pack; Also includes: Sending a detection instruction to each of the first switch devices and / or the charging control switch; Based on a feedback signal of the first switching device and / or the charging control switch, a fault detection result of the first switching device and / or the charging control switch is determined.

7. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for powering an electric vehicle according to any one of claims 1 to 4 is implemented.

8. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method for powering an electric vehicle according to any one of claims 1 to 4 is implemented.

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