Electric vehicle storage battery charging system and control method thereof

Abstract

The invention provides an electric vehicle storage battery charging system and a control method thereof. The electric vehicle storage battery charging system comprises a vehicle body controller, a vehicle control unit, a battery management system, a power battery and a to-be-controlled storage battery. The vehicle body controller obtains operation parameters of the to-be-controlled electric vehicle; when the operating parameters meet the parameter requirements, determining a voltage acquisition period and a charging range of the operating parameters; based on the voltage acquisition period, acquiring a real-time voltage value of the storage battery to be controlled; if the real-time voltage value is within the charging range, a vehicle control unit is awakened through a charging awakening signal; the vehicle control unit receives the charging wake-up signal and outputs the charging wake-up signal of the battery management system; when the battery management system is awakened based on the charging awakening signal, the vehicle control unit also collects the residual electric quantity of the power battery; if the residual electric quantity is greater than the threshold, outputting a charging signal of the battery management system; and the battery management system responds to the charging signal and controls the power battery to charge the storage battery to be controlled for a certain time. The system can reduce the vehicle cost.

Description

Technical Field

[0001] The present invention relates to the field of automobile electronics, and in particular to an electric vehicle battery charging system and a control method thereof. Background Art

[0002] As commercial vehicles gradually move towards electrification, intelligence, networking and sharing, the functions of new energy vehicles are becoming more and more complex, and the number of control components on the vehicle is also increasing. The abnormal awakening and long-term non-sleep problems of various controllers will increase the burden on the low-voltage battery, and may even cause the low-voltage battery to be unable to supply high voltage, affecting the normal operation of the vehicle.

[0003] Currently in the automotive industry, new energy vehicles continuously monitor the battery voltage through the battery health monitoring system IBS or other monitoring modules. This method requires a data acquisition module to collect the voltage data of the battery voltage and transmit it to the central processing unit in real time, resulting in high costs for existing technologies. Summary of the invention

[0004] The object of the present invention is to provide a battery charging system for electric vehicles and a control method thereof, so as to alleviate the technical problem of the high cost of the existing battery charging for electric vehicles, thereby reducing the design cost of the vehicle.

[0005] In a first aspect, an embodiment of the present invention provides a battery charging system for an electric vehicle, comprising: a body controller, a vehicle controller, a battery management system, a power battery and a battery to be controlled which are connected in sequence; the body controller, the vehicle controller, the battery management system, the power battery and the battery to be controlled are all arranged on the electric vehicle to be controlled; the body controller is used to obtain the operating status and environmental parameters of the electric vehicle to be controlled; determine whether the operating status and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage collection period of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the operating status and the environmental parameters according to the operating status and the environmental parameters; based on the electric During the voltage collection cycle, the real-time voltage value of the above-mentioned battery to be controlled is collected; whether the above-mentioned real-time voltage value is within the above-mentioned preset charging range is judged; if so, the above-mentioned vehicle controller is awakened by a charging wake-up signal; the above-mentioned vehicle controller is used to output the charging wake-up signal of the above-mentioned battery management system when receiving the above-mentioned charging wake-up signal; when the above-mentioned battery management system is awakened based on the charging wake-up signal of the above-mentioned battery management system, the above-mentioned vehicle controller is also used to collect the remaining power of the above-mentioned power battery; whether the above-mentioned remaining power is greater than a preset threshold value; if so, the charging signal of the above-mentioned battery management system is output; the above-mentioned battery management system is used to respond to the above-mentioned charging signal to control the above-mentioned power battery to charge the above-mentioned battery to be controlled for a preset time.

[0006] In a preferred embodiment of the present invention, the above-mentioned operating status includes: the braking status of the above-mentioned tram to be controlled; the above-mentioned environmental parameters include: the ambient temperature and ambient humidity of the above-mentioned tram to be controlled; the above-mentioned body controller is also used to obtain the above-mentioned braking status, the above-mentioned ambient temperature and ambient humidity; based on preset parameters, the above-mentioned voltage collection period is adjusted according to the above-mentioned braking status, the above-mentioned ambient temperature and ambient humidity.

[0007] In a preferred embodiment of the present invention, the above-mentioned body controller is connected to the above-mentioned vehicle controller through a first wire; the above-mentioned body controller is also used to determine whether the above-mentioned real-time voltage value is within the first sub-charging range of the above-mentioned charging range; when the above-mentioned real-time voltage value is within the above-mentioned first sub-charging range; the first charging wake-up signal in the above-mentioned charging wake-up signal is transmitted through the above-mentioned first wire to wake up the above-mentioned vehicle controller.

[0008] In a preferred embodiment of the present invention, the system further includes: a backup battery device connected to both the body controller and the vehicle controller; the backup battery device is connected to the vehicle controller via a second wire; the body controller is also used to determine whether the real-time voltage value is within a second sub-charging range of the charging range; when the real-time voltage value is within the second sub-charging range; the backup battery device is started, and the second charging wake-up signal in the charging wake-up signal is transmitted through the second wire to wake up the vehicle controller.

[0009] In a preferred embodiment of the present invention, the value of the second sub-charging range is smaller than the value of the first sub-charging range.

[0010] In a preferred embodiment of the present invention, the first sub-charging range is 10.5V to 11.5V; the second sub-charging range is 9V to 10.5V; the preset threshold is 20% of the power battery; and the preset time is 45 minutes.

[0011] In a preferred embodiment of the present invention, the system further includes: a voltage conversion module connected to both the power battery and the battery to be controlled; the battery management system is also used to respond to the charging signal and control the power battery to output a first charging voltage; the voltage conversion module is used to convert the first charging voltage into a second charging voltage to charge the battery to be controlled for a preset time.

[0012] In a preferred embodiment of the present invention, the above-mentioned vehicle controller is connected to the above-mentioned battery management system via a relay; the above-mentioned vehicle controller is also used to control the above-mentioned relay to close when receiving the above-mentioned charging wake-up signal, and control the above-mentioned battery to power the above-mentioned battery management system, and output the charging wake-up signal of the above-mentioned battery management system.

[0013] In a preferred embodiment of the present invention, the type of the above-mentioned relay is a five-prong relay.

[0014] In a preferred embodiment of the present invention, when the operating state is the full-function power-on mode of the electric vehicle to be controlled, the battery management system controls the power battery to end the charging state.

[0015] In a preferred embodiment of the present invention, when the remaining power is less than or equal to a preset threshold, the battery management system controls the power battery to end the charging state.

[0016] In a second aspect, an embodiment of the present invention further provides a control method for a battery charging system for an electric vehicle, which is applied to the above-mentioned battery charging system for an electric vehicle, and the above-mentioned method comprises: obtaining the operating state and environmental parameters of the above-mentioned electric vehicle to be controlled through a vehicle body controller; judging whether the above-mentioned operating state and environmental parameters meet the preset parameter requirements; if so, determining the preset voltage collection period of the above-mentioned battery to be controlled and the preset charging range of the above-mentioned battery to be controlled corresponding to the above-mentioned operating state and the above-mentioned environmental parameters according to the above-mentioned operating state and the above-mentioned environmental parameters; based on the above-mentioned voltage collection period, collecting the real-time voltage value of the above-mentioned battery to be controlled; judging whether the above-mentioned real-time voltage value is within the above-mentioned preset charging range; if so, waking up the above-mentioned whole vehicle controller through a charging wake-up signal; when the above-mentioned charging wake-up signal is received by the whole vehicle controller, outputting the charging wake-up signal of the above-mentioned battery management system; when the above-mentioned battery management system is awakened based on the charging wake-up signal of the above-mentioned battery management system, collecting the remaining power of the above-mentioned power battery; judging whether the above-mentioned remaining power is greater than the preset threshold value; if so, outputting the charging signal of the above-mentioned battery management system; responding to the above-mentioned charging signal through the battery management system, controlling the above-mentioned power battery to charge the above-mentioned battery to be controlled for a preset time.

[0017] The embodiments of the present invention have the following beneficial technical effects: The embodiment of the present invention provides a battery charging system for electric vehicles and a control method thereof, comprising: a body controller, a whole vehicle controller, a battery management system, a power battery and a battery to be controlled which are connected in sequence; the body controller, the whole vehicle controller, the battery management system, the power battery and the battery to be controlled are all arranged on the electric vehicle to be controlled; the body controller is used to obtain the operating state and environmental parameters of the electric vehicle to be controlled; it is judged whether the operating state and environmental parameters meet the preset parameter requirements; if so, according to the operating state and environmental parameters, the preset voltage collection period of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the operating state and the environmental parameters are determined; based on the electric During the voltage collection cycle, the real-time voltage value of the battery to be controlled is collected; it is judged whether the real-time voltage value is within the preset charging range; if so, the vehicle controller is awakened by a charging wake-up signal; the vehicle controller is used to output the charging wake-up signal of the battery management system when receiving the charging wake-up signal; when the battery management system is awakened based on the charging wake-up signal of the battery management system, the vehicle controller is also used to collect the remaining power of the power battery; it is judged whether the remaining power is greater than the preset threshold; if so, the charging signal of the battery management system is output; the battery management system is used to respond to the charging signal and control the power battery to charge the battery to be controlled for a preset time. The system monitors the real-time voltage value of the battery to be controlled through the vehicle's body controller, vehicle controller, and battery management system, so there is no need to set up the battery health monitoring system to reduce vehicle costs.

[0018] Other features and advantages disclosed in this embodiment will be described in the subsequent description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology of the present disclosure.

[0019] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram of the structure of a battery charging system for electric vehicles provided by an embodiment of the present invention; Figure 2 A schematic diagram of the structure of another electric vehicle battery charging system provided by an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a third electric vehicle battery charging system provided by an embodiment of the present invention; Figure 4 A schematic flow chart of a control method for a battery charging system for an electric vehicle provided in an embodiment of the present invention.

[0022] Icons: 11-body controller; 12-vehicle controller; 13-battery management system; 14-power battery; 15-battery to be controlled; 21-backup battery device; 31-voltage conversion module. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0024] At present, in the automotive industry, new energy vehicles continuously monitor the battery voltage through the battery health monitoring system IBS or other monitoring modules. This method requires a data acquisition module to collect the voltage data of the battery voltage and transmit it to the central processing unit in real time, resulting in high costs for existing technologies.

[0025] Based on this, an embodiment of the present invention provides a battery charging system for electric vehicles and a control method thereof. The system monitors the real-time voltage value of the battery to be controlled through the vehicle body controller, vehicle controller, and battery management system, so that the battery health monitoring system mentioned above does not need to be set up to reduce vehicle costs. In order to facilitate understanding of the present invention, a battery charging system for electric vehicles is first introduced.

[0026] Example 1 In this embodiment, Figure 1 A schematic structural diagram of a battery charging system for an electric vehicle provided in an embodiment of the present invention.

[0027] Depend on Figure 1 As can be seen, the system includes: a body controller 11, a vehicle controller 12, a battery management system 13, a power battery 14 and a battery to be controlled 15 connected in sequence; the body controller 11, the vehicle controller 12, the battery management system 13, the power battery 14 and the battery to be controlled 15 are all arranged on the electric vehicle to be controlled.

[0028] Among them, the above-mentioned body controller 11 is used to obtain the operating status and environmental parameters of the above-mentioned electric vehicle to be controlled; determine whether the above-mentioned operating status and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage collection period of the above-mentioned battery to be controlled and the preset charging range of the above-mentioned battery to be controlled 15 corresponding to the above-mentioned operating status and the above-mentioned environmental parameters according to the above-mentioned operating status and the above-mentioned environmental parameters; based on the above-mentioned voltage collection period, collect the real-time voltage value of the above-mentioned battery to be controlled 15; determine whether the above-mentioned real-time voltage value is within the above-mentioned preset charging range; if so, wake up the above-mentioned vehicle controller 12 through a charging wake-up signal; the above-mentioned vehicle controller 12 is used to output the charging wake-up signal of the above-mentioned battery management system when receiving the above-mentioned charging wake-up signal; when the above-mentioned battery management system 13 is awakened based on the charging wake-up signal of the above-mentioned battery management system 13, the above-mentioned vehicle controller 12 is also used to collect the remaining power of the above-mentioned power battery; determine whether the above-mentioned remaining power is greater than the preset threshold value; if so, output the charging signal of the above-mentioned battery management system; the above-mentioned battery management system 13 is used to respond to the above-mentioned charging signal and control the above-mentioned power battery 14 to charge the above-mentioned battery to be controlled 15 for a preset time.

[0029] In this embodiment, the above-mentioned operating state includes: the braking state of the above-mentioned tram to be controlled; the above-mentioned environmental parameters include: the ambient temperature and ambient humidity of the above-mentioned tram to be controlled.

[0030] In one embodiment, the parameter requirements include: whether the braking state is a uniform driving state or a stationary state and whether the ambient temperature and the ambient humidity meet the preset ambient temperature threshold and the ambient humidity threshold; if the braking state is a uniform driving state or a stationary state, and the ambient temperature and the ambient humidity meet the preset ambient temperature threshold and the ambient humidity threshold respectively, then it is considered that the operating state and the environmental parameters meet the preset parameter requirements, otherwise, it is not.

[0031] This is because the battery charge fluctuates when the vehicle is accelerating or decelerating; when the ambient temperature of the vehicle is low or the ambient humidity is too high, the battery performance will also decline. Therefore, when the above-mentioned operating status and environmental parameters meet the preset parameter requirements, that is, the performance of the above-mentioned battery changes little, the preset voltage collection period of the above-mentioned battery to be controlled corresponding to the above-mentioned operating status and the above-mentioned environmental parameters is generally the preset basic collection period, which is generally set to 2 hours and minutes.

[0032] Furthermore, the vehicle body controller 11 is also used to obtain the braking state, the ambient temperature and the ambient humidity; based on preset parameters, the voltage acquisition period is adjusted according to the braking state, the ambient temperature and the ambient humidity.

[0033] In one embodiment, assuming that the braking state is when the vehicle is accelerating or decelerating, and the ambient temperature and the ambient humidity exceed the ambient temperature threshold and the ambient humidity threshold, the preset parameter is set to 20 minutes, that is, the voltage sampling period is set to 1 hour and 40 minutes, and the difference between the voltage collection period before adjustment and the preset parameter is set to the voltage collection period after adjustment.

[0034] Here, the above-mentioned environmental temperature threshold is generally set to 45 degrees Celsius; the above-mentioned environmental humidity threshold is between 40% and 60%.

[0035] Furthermore, the voltage of the battery to be controlled is collected according to the adjusted voltage collection cycle. If the fluctuation of the obtained battery voltage is greater than the preset value, the voltage collection cycle is further shortened according to the preset parameters until real-time collection is achieved.

[0036] In another embodiment, assuming that the above-mentioned braking state is that the vehicle is traveling at a constant speed or is stationary, and the above-mentioned ambient temperature and the above-mentioned ambient humidity do not exceed the above-mentioned ambient temperature threshold and the ambient humidity threshold, the above-mentioned system collects the voltage of the above-mentioned battery to be controlled according to the above-mentioned basic collection period. If the fluctuation of the battery voltage is greater than the above-mentioned preset value, then the above-mentioned voltage collection period will continue to be shortened according to the above-mentioned preset parameters until the level of real-time collection is reached.

[0037] In actual operation, the body controller 11 is connected to the vehicle controller 12 via a first wire; the body controller 11 is also used to determine whether the real-time voltage value is within the first sub-charging range of the charging range; when the real-time voltage value is within the first sub-charging range; the first charging wake-up signal in the charging wake-up signal is transmitted via the first wire to wake up the vehicle controller 12.

[0038] Above Figure 1 On the basis of Figure 2 A schematic structural diagram of another electric vehicle battery charging system provided in an embodiment of the present invention.

[0039] Depend on Figure 2 As can be seen, the above-mentioned system also includes: a backup battery device 21 connected to both the above-mentioned body controller 11 and the above-mentioned vehicle controller 12; the above-mentioned backup battery device 21 is connected to the above-mentioned vehicle controller 12 through a second wire; the above-mentioned body controller 11 is also used to determine whether the above-mentioned real-time voltage value is within the second sub-charging range of the above-mentioned charging range; when the above-mentioned real-time voltage value is within the above-mentioned second sub-charging range; the above-mentioned backup battery device 21 is started, and the second charging wake-up signal in the above-mentioned charging wake-up signal is transmitted through the above-mentioned second wire to wake up the above-mentioned vehicle controller 12.

[0040] In one embodiment, a value of the second sub-charging range is smaller than a value of the first sub-charging range.

[0041] Furthermore, the first sub-charging range is 10.5V to 11.5V; the second sub-charging range is 9V to 10.5V; the preset threshold is 20% of the power battery, and the preset time is 45 minutes.

[0042] Here, the present invention integrates the above-mentioned electric vehicle battery charging system through the vehicle body controller to realize the intelligent charging function, and prevents the pure electric vehicle power feeding problem under the premise of double guaranteeing the normal realization of the functions, while reducing costs and increasing efficiency to a certain extent.

[0043] Above Figure 2 On the basis of Figure 3 A schematic structural diagram of a third electric vehicle battery charging system provided in an embodiment of the present invention.

[0044] Depend on Figure 3 As can be seen, the above-mentioned system also includes: a voltage conversion module 31 connected to the above-mentioned power battery 14 and the above-mentioned controlled battery 15; the above-mentioned battery management system 13 is also used to respond to the above-mentioned charging signal and control the above-mentioned power battery 14 to output a first charging voltage; the above-mentioned voltage conversion module 31 is used to convert the above-mentioned first charging voltage into a second charging voltage to charge the above-mentioned controlled battery 15 for a preset time.

[0045] In actual operation, the vehicle controller 12 is connected to the battery management system 13 through a relay; the vehicle controller 12 is also used to control the relay to close when receiving the charging wake-up signal, and control the battery to supply power to the battery management system 13, and output the charging wake-up signal of the battery management system 13.

[0046] Here, the storage battery generally supplies power to the battery management system 13 at a low voltage.

[0047] Furthermore, the type of the above-mentioned relay is a five-prong relay.

[0048] In actual operation, the vehicle controller 12 is connected to the relay via a third wire; the battery management system is connected to the relay via a fourth wire.

[0049] Furthermore, when the above-mentioned operating state is the full-function power-on mode of the above-mentioned electric vehicle to be controlled, the above-mentioned battery management system controls the above-mentioned power battery to end the charging state.

[0050] Here, the above-mentioned operating state is that the full-function power-on mode of the above-mentioned electric vehicle to be controlled is the ON gear power of the above-mentioned electric vehicle to be controlled.

[0051] Furthermore, when the remaining power is less than or equal to a preset threshold, the battery management system 13 controls the power battery to end the charging state.

[0052] Here, the remaining power being less than or equal to a preset threshold generally means that the remaining power is less than 20 percent of the power battery 14 .

[0053] In actual operation, the above-mentioned electric vehicles to be controlled are pure electric commercial vehicles.

[0054] The embodiment of the present invention provides a battery charging system for electric vehicles, comprising: a body controller, a whole vehicle controller, a battery management system, a power battery and a battery to be controlled which are connected in sequence; the body controller, the whole vehicle controller, the battery management system, the power battery and the battery to be controlled are all arranged on the electric vehicle to be controlled; the body controller is used to obtain the operating state and environmental parameters of the electric vehicle to be controlled; determine whether the operating state and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage collection period of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the operating state and the environmental parameters according to the operating state and the environmental parameters; based on the voltage collection period, collect the real-time voltage value of the above-mentioned battery to be controlled; judge whether the above-mentioned real-time voltage value is within the above-mentioned preset charging range; if so, wake up the above-mentioned vehicle controller through the charging wake-up signal; the above-mentioned vehicle controller is used to output the charging wake-up signal of the above-mentioned battery management system when receiving the above-mentioned charging wake-up signal; when the above-mentioned battery management system is awakened based on the charging wake-up signal of the above-mentioned battery management system, the above-mentioned vehicle controller is also used to collect the remaining power of the above-mentioned power battery; judge whether the above-mentioned remaining power is greater than the preset threshold; if so, output the charging signal of the above-mentioned battery management system; the above-mentioned battery management system is used to respond to the above-mentioned charging signal and control the above-mentioned power battery to charge the above-mentioned battery to be controlled for a preset time. The system monitors the real-time voltage value of the battery to be controlled through the vehicle's body controller, vehicle controller, and battery management system, so there is no need to set up the above-mentioned battery health monitoring system to reduce vehicle costs.

[0055] Example 2 Based on the above embodiments, Figure 4 A schematic flow chart of a control method for a battery charging system for an electric vehicle provided in an embodiment of the present invention.

[0056] In this embodiment, the control method of the electric vehicle battery charging system is applied to the electric vehicle battery charging system in the above embodiments.

[0057] Depend on Figure 4 As can be seen, the control method includes: Step S401: obtaining the operating status and environmental parameters of the above-mentioned electric vehicle to be controlled through the vehicle body controller; judging whether the above-mentioned operating status and environmental parameters meet the preset parameter requirements; if so, determining the preset voltage collection period of the above-mentioned battery to be controlled and the preset charging range of the above-mentioned battery to be controlled corresponding to the above-mentioned operating status and the above-mentioned environmental parameters according to the above-mentioned operating status and the above-mentioned environmental parameters; based on the above-mentioned voltage collection period, collecting the real-time voltage value of the above-mentioned battery to be controlled; judging whether the above-mentioned real-time voltage value is within the above-mentioned preset charging range; if so, waking up the above-mentioned vehicle controller through a charging wake-up signal.

[0058] Step S402: When the vehicle controller receives the charging wake-up signal, it outputs the charging wake-up signal of the battery management system; when the battery management system is awakened based on the charging wake-up signal of the battery management system, it collects the remaining power of the power battery; determines whether the remaining power is greater than a preset threshold; if so, outputs the charging signal of the battery management system.

[0059] Step S403: the battery management system responds to the charging signal to control the power battery to charge the battery to be controlled for a preset time.

[0060] In one embodiment, the above-mentioned operating state includes: the braking state of the above-mentioned tram to be controlled; the above-mentioned environmental parameters include: the ambient temperature and ambient humidity of the above-mentioned tram to be controlled; after the above-mentioned step S401, the method also includes: the above-mentioned body controller is also used to obtain the above-mentioned braking state, the above-mentioned ambient temperature and ambient humidity; based on preset parameters, the above-mentioned voltage collection period is adjusted according to the above-mentioned braking state, the above-mentioned ambient temperature and ambient humidity.

[0061] The control method of the electric vehicle battery charging system provided in the embodiment of the present invention has the same technical features as the electric vehicle battery charging system provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the control method of the electric vehicle battery charging system described above can refer to the corresponding process in the above electric vehicle battery charging system embodiment, and will not be repeated here.

[0062] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

Claims

1. A battery charging system for electric vehicles, characterized in that: include: A body controller, a vehicle controller, a battery management system, a power battery and a storage battery to be controlled which are connected in sequence; the body controller, the vehicle controller, the battery management system, the power battery and the storage battery to be controlled are all arranged on the electric vehicle to be controlled; The vehicle body controller is used to obtain the operating state and environmental parameters of the electric vehicle to be controlled; and to determine whether the operating state and environmental parameters meet the preset parameter requirements; If yes, according to the operating state and the environmental parameters, determine the preset voltage collection period of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the operating state and the environmental parameters; based on the voltage collection period, collect the real-time voltage value of the battery to be controlled; and determine whether the real-time voltage value is within the preset charging range; If yes, waking up the vehicle controller through a charging wake-up signal; The vehicle controller is used to output the charging wake-up signal of the battery management system when receiving the charging wake-up signal; when the battery management system is awakened based on the charging wake-up signal of the battery management system, the vehicle controller is also used to collect the remaining power of the power battery; determine whether the remaining power is greater than a preset threshold; if so, output the charging signal of the battery management system; The battery management system is used to respond to the charging signal and control the power battery to charge the storage battery to be controlled for a preset time.

2. The electric vehicle battery charging system according to claim 1, characterized in that: The operating state includes: the braking state of the electric vehicle to be controlled; the environmental parameters include: the ambient temperature and humidity of the electric vehicle to be controlled; The vehicle body controller is also used to obtain the braking state, the ambient temperature and the ambient humidity; based on preset parameters, the voltage acquisition cycle is adjusted according to the braking state, the ambient temperature and the ambient humidity.

3. The electric vehicle battery charging system according to claim 1, characterized in that: The body controller is connected to the vehicle controller via a first wire; The vehicle body controller is also used to determine whether the real-time voltage value is within a first sub-charging range of the charging range; when the real-time voltage value is within the first sub-charging range; the first charging wake-up signal in the charging wake-up signal is transmitted through the first wire to wake up the vehicle controller.

4. The electric vehicle battery charging system according to claim 3, characterized in that: The system further comprises: a backup battery device connected to both the vehicle body controller and the vehicle controller; the backup battery device is connected to the vehicle controller via a second wire; The vehicle body controller is also used to determine whether the real-time voltage value is within a second sub-charging range of the charging range; when the real-time voltage value is within the second sub-charging range; start the backup battery device, and transmit the second charging wake-up signal in the charging wake-up signal through the second wire to wake up the vehicle controller.

5. The electric vehicle battery charging system according to claim 4, characterized in that: A value of the second sub-charging range is smaller than a value of the first sub-charging range.

6. The electric vehicle battery charging system according to claim 5, characterized in that: The first sub-charging range is 10.5V to 11.5V; the second sub-charging range is 9V to 10.5V; the preset threshold is 20% of the power battery; and the preset time is 45 minutes.

7. The electric vehicle battery charging system according to claim 1, characterized in that: The system further comprises: a voltage conversion module connected to both the power battery and the storage battery to be controlled; The battery management system is further configured to respond to the charging signal and control the power battery to output a first charging voltage; The voltage conversion module is used to convert the first charging voltage into a second charging voltage to charge the battery to be controlled for a preset time.

8. The electric vehicle battery charging system according to claim 1, characterized in that: The vehicle controller is connected to the battery management system via a relay; The vehicle controller is also used to control the relay to close when receiving the charging wake-up signal, control the battery to power the battery management system, and output the charging wake-up signal of the battery management system.

9. The electric vehicle battery charging system according to claim 8, characterized in that: The type of relay is a five-prong relay.

10. The electric vehicle battery charging system according to claim 1, characterized in that: When the operating state is the full-function power-on mode of the electric vehicle to be controlled, the battery management system controls the power battery to end the charging state.

11. The electric vehicle battery charging system according to claim 1, characterized in that: When the remaining power is less than or equal to a preset threshold, the battery management system controls the power battery to end the charging state.

12. A control method for a battery charging system for an electric vehicle, characterized in that: Applied to the electric vehicle battery charging system according to any one of claims 1 to 11, the method comprises: Obtain the operating status and environmental parameters of the electric vehicle to be controlled through the vehicle body controller; determine whether the operating status and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage collection cycle of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the operating status and the environmental parameters according to the operating status and the environmental parameters; based on the voltage collection cycle, collect the real-time voltage value of the battery to be controlled; determine whether the real-time voltage value is within the preset charging range; if so, wake up the vehicle controller through a charging wake-up signal; When the vehicle controller receives the charging wake-up signal, it outputs the charging wake-up signal of the battery management system; when the battery management system is awakened based on the charging wake-up signal of the battery management system, it collects the remaining power of the power battery; determines whether the remaining power is greater than a preset threshold; if so, outputs the charging signal of the battery management system; The battery management system responds to the charging signal and controls the power battery to charge the battery to be controlled for a preset time.

Images