Tram Battery Charging System and Its Control Method

Abstract

The present invention provides a tram battery charging supplement system and its control method, including: a body controller, a vehicle controller, a battery management system, a power battery, and a battery to be controlled; the body controller obtains the operating parameters of the tram to be controlled; when the operating parameters meet the parameter requirements, determine the voltage acquisition period and charging range corresponding to the operating parameters; based on the voltage acquisition period, collect the real-time voltage value of the battery to be controlled; if the real-time voltage value is within the charging range, wake up the vehicle controller through a charging wake-up signal; when the vehicle controller receives the charging wake-up signal, output a charging wake-up signal for the battery management system; when the battery management system is woken up based on the charging wake-up signal, the vehicle controller also collects the remaining power of the power battery; if the remaining power is greater than the threshold value, output a charging signal for the battery management system; the battery management system responds to the charging signal and controls the power battery to perform a charging action on the battery to be controlled for a certain time. This system can reduce vehicle costs.

Description

Technical Field

[0001] The present invention relates to the field of automotive electronics, and particularly to a charging system for an electric vehicle battery 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 have become increasingly complex, and the control components on the vehicle have also increased accordingly. The abnormal wake-up 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 lose power, resulting in the vehicle being unable to go on high voltage and affecting the normal operation of the vehicle.

[0003] Currently, in the automotive industry, the health monitoring system IBS of the new energy vehicle battery or other monitoring modules continuously monitor the battery voltage. This method has a high cost in the prior art because it 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. Summary of the Invention

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

[0005] In a first aspect, an embodiment of the present invention provides a charging system for an electric vehicle battery, including: 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 vehicle to be controlled; the body controller is used to obtain the operating state and environmental parameters of the vehicle to be controlled; determine whether the operating state and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage acquisition period of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the operating state and environmental parameters based on the operating state and the environmental parameters; collect the real-time voltage value of the battery to be controlled based on the voltage acquisition period; 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; the vehicle controller is used to output a charging wake-up signal of the battery management system when receiving the charging wake-up signal; when the battery management system is woken up based on the charging wake-up signal of the battery management system, the vehicle controller is further used to collect the remaining power of the power battery; determine whether the remaining power is greater than a preset threshold; if so, output a 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 perform a charging operation on the battery to be controlled for a preset time.

[0006] In a preferred embodiment of the present invention, the above operating state includes: the braking state of the tram to be controlled; the above environmental parameters include: the environmental temperature and environmental humidity where the tram to be controlled is located; the body controller is further configured to obtain the braking state, the environmental temperature, and the environmental humidity; based on preset parameters, adjust the voltage acquisition period according to the braking state, the environmental temperature, and the environmental humidity.

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

[0008] In a preferred embodiment of the present invention, the above system further includes: an emergency battery device connected to both the body controller and the vehicle controller; the emergency battery device is connected to the vehicle controller through a second wire; the body controller is further configured to determine whether the real-time voltage value is within a second sub-charging range of the above charging range; when the real-time voltage value is within the second sub-charging range; start the emergency battery device and transmit a second charging wake-up signal in the above charging wake-up signal 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 less 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 above power battery; the preset time is 45 minutes.

[0011] In a preferred embodiment of the present invention, the above system further includes: a voltage conversion module connected to both the power battery and the battery to be controlled; the battery management system is further configured to respond to the above charging signal and control the power battery to output a first charging voltage; the voltage conversion module is configured 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 vehicle controller is connected to the battery management system through a relay; the vehicle controller is further configured to, when receiving the above charging wake-up signal, control the relay to close, control the battery to supply power to the battery management system, and output the charging wake-up signal of the battery management system.

[0013] In a preferred embodiment of the present invention, the 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, the method comprising: obtaining the operating status and environmental parameters of the above-mentioned electric vehicle to be controlled through a vehicle body controller; judging whether the above-mentioned operating status and environmental parameters meet preset parameter requirements; if so, determining a preset voltage acquisition period of the above-mentioned battery to be controlled and a preset charging range of the above-mentioned battery to be controlled corresponding to the above-mentioned operating status and the above-mentioned environmental parameters based on the above-mentioned operating status and the above-mentioned environmental parameters; based on the above-mentioned voltage acquisition period, acquiring 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; when the above-mentioned charging wake-up signal is received, the vehicle controller outputs a 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, acquiring the remaining power of the above-mentioned power battery; judging whether the above-mentioned remaining power is greater than a preset threshold value; if so, outputting a charging signal of the above-mentioned battery management system; and controlling the above-mentioned power battery to charge the above-mentioned battery to be controlled for a preset time in response to the above-mentioned charging signal through the battery management system.

[0017] The embodiments of the present invention have the following beneficial technical effects:

[0018] An embodiment of the present invention provides a trolley battery charging system and its control method, including: a body controller, a vehicle controller, a battery management system, a power battery, and a battery to be controlled connected in sequence; the above body controller, the above vehicle controller, the above battery management system, the above power battery, and the above battery to be controlled are all arranged on the trolley to be controlled; the body controller is used to obtain the operating state and environmental parameters of the trolley to be controlled; judge whether the operating state and environmental parameters meet the preset parameter requirements; if so, determine the voltage acquisition period of the preset 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; collect the real-time voltage value of the battery to be controlled based on the voltage acquisition period; judge 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; 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 woken up based on the charging wake-up signal of the battery management system, the vehicle controller is further used to collect the remaining power of the power battery; judge 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 perform a charging action on the battery to be controlled for a preset time. This system monitors the real-time voltage value of the battery to be controlled through the body controller, vehicle controller, and battery management system of the vehicle, so there is no need to set up the above battery health monitoring system to reduce the vehicle cost.

[0019] Other features and advantages disclosed in this embodiment will be described in the subsequent description, or, some features and advantages can be inferred from the description or determined without doubt, or can be known by implementing the above technologies of the present disclosure.

[0020] In order to make the above objects, features, and advantages of the present disclosure more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic structural diagram of a trolley battery charging system provided by an embodiment of the present invention;

[0023] Figure 2 Schematic diagram of another battery charging system for electric vehicles provided by an embodiment of the present invention;

[0024] Figure 3 Schematic diagram of the third battery charging system for electric vehicles provided by an embodiment of the present invention;

[0025] Figure 4 Schematic flow chart of a control method for a battery charging system of an electric vehicle provided by an embodiment of the present invention.

[0026] 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 implementation manners

[0027] To make the objectives, 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 with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Usually, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0028] Currently, in the automotive industry, new energy vehicles monitor the battery voltage continuously through a battery health monitoring system IBS or other monitoring modules. This type of 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 a relatively high cost in the prior art.

[0029] Based on this, the embodiments of the present invention provide a battery charging system for electric vehicles and its control method. The system monitors the real-time voltage value of the battery to be controlled through the body controller, vehicle controller, and battery management system of the vehicle, so that it is not necessary to set the above-mentioned battery health monitoring system to reduce the vehicle cost. To facilitate the understanding of the present invention, a battery charging system for electric vehicles will be introduced first.

[0030] Embodiment 1

[0031] In this embodiment, Figure 1 Schematic diagram of a battery charging system for electric vehicles provided by an embodiment of the present invention.

[0032] By Figure 1As 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 above-mentioned body controller 11, the above-mentioned vehicle controller 12, the above-mentioned battery management system 13, the above-mentioned power battery 14 and the above-mentioned battery to be controlled 15 are all arranged on the electric vehicle to be controlled.

[0033] wherein the vehicle body controller 11 is configured to obtain the operating status and environmental parameters of the electric vehicle to be controlled; determine whether the operating status and environmental parameters meet preset parameter requirements; if so, determine a preset voltage acquisition period of the battery to be controlled and a preset charging range of the battery to be controlled 15 corresponding to the operating status and the environmental parameters based on the operating status and the environmental parameters; acquire the real-time voltage value of the battery to be controlled 15 based on the voltage acquisition period; determine whether the real-time voltage value is within the preset charging range; if so, awaken the vehicle controller 12 via a charging awakening signal; the vehicle controller 12 is configured to output a charging awakening signal of the battery management system upon receiving the charging awakening signal; when the battery management system 13 is awakened based on the charging awakening signal of the battery management system 13, the vehicle controller 12 is further configured to acquire the remaining power of the power battery; determine whether the remaining power is greater than a preset threshold; if so, output a charging signal of the battery management system; the battery management system 13 is configured to respond to the charging signal and control the power battery 14 to charge the battery to be controlled 15 for a preset time.

[0034] In this embodiment, the operating state includes: a braking state of the electric vehicle to be controlled; and the environmental parameters include: an ambient temperature and an ambient humidity of the electric vehicle to be controlled.

[0035] In one embodiment, the above-mentioned parameter requirements include: whether the above-mentioned braking state is a uniform speed driving state or a stationary state, and whether the above-mentioned ambient temperature and the above-mentioned ambient humidity meet the preset ambient temperature threshold and ambient humidity threshold; if the above-mentioned braking state is a uniform speed driving state or a stationary state, and the ambient temperature and the above-mentioned ambient humidity respectively meet the preset ambient temperature threshold and ambient humidity threshold, then it is considered that the above-mentioned operating state and environmental parameters meet the preset parameter requirements, otherwise, it is not.

[0036] 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 a preset basic collection period, which is generally set to 2 hours and minutes.

[0037] Furthermore, the vehicle body controller 11 is also used to obtain the braking state, the ambient temperature and the ambient humidity; and adjust the voltage acquisition period based on preset parameters and according to the braking state, the ambient temperature and the ambient humidity.

[0038] In one embodiment, assuming that the above-mentioned braking state is when the vehicle is accelerating and decelerating, and the above-mentioned ambient temperature and the above-mentioned ambient humidity exceed the above-mentioned ambient temperature threshold and the ambient humidity threshold, the above-mentioned preset parameter is set to 20 minutes, that is, the above-mentioned voltage sampling period is set to 1 hour and 40 minutes, that is, the difference between the voltage collection period before adjustment and the above-mentioned preset parameter is set to the voltage collection period after adjustment.

[0039] Here, the above-mentioned ambient temperature threshold is generally set to 45 degrees Celsius; the above-mentioned ambient humidity threshold is between 40% and 60%.

[0040] Furthermore, the voltage of the battery to be controlled is collected according to the adjusted voltage collection cycle. If the fluctuation of the 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.

[0041] In another embodiment, assuming that the above-mentioned braking state is when 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 obtained is greater than the above-mentioned preset value, 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.

[0042] In actual operation, the above-mentioned body controller 11 is connected to the above-mentioned vehicle controller 12 through a first wire; the above-mentioned body controller 11 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 12.

[0043] AboveFigure 1 Based on Figure 2 FIG. is a schematic structural diagram of another electric vehicle battery charging system provided by an embodiment of the present invention.

[0044] As Figure 2 seen, the above system further includes: a backup battery device 21 connected to both the above body controller 11 and the above vehicle controller 12; the backup battery device 21 is connected to the above vehicle controller 12 through a second wire; the above body controller 11 is further configured to determine whether the above real-time voltage value is within a second sub-charging range of the above charging range; when the above real-time voltage value is within the above second sub-charging range; start the above backup battery device 21, and transmit a second charging wake-up signal in the above charging wake-up signal through the above second wire to wake up the above vehicle controller 12.

[0045] In one of the implementation manners, the value of the above second sub-charging range is less than the value of the above first sub-charging range.

[0046] Further, the above first sub-charging range is 10.5V to 11.5V; the above second sub-charging range is 9V to 10.5V; the above preset threshold is 20% of the above power battery, and the above preset time is 45 minutes.

[0047] Here, the present invention integrates the above electric vehicle battery charging system through a body controller to realize an intelligent charging function, double-guarantee the normal realization of the function, prevent the problem of power failure of pure electric vehicles, and reduce costs and increase efficiency to a certain extent.

[0048] The above Figure 2 Based on Figure 3 FIG. is a schematic structural diagram of a third electric vehicle battery charging system provided by an embodiment of the present invention.

[0049] As Figure 3 seen, the above system further includes: a voltage conversion module 31 connected to both the above power battery 14 and the above battery to be controlled 15; the above battery management system 13 is further configured to respond to the above charging signal and control the above power battery 14 to output a first charging voltage; the above voltage conversion module 31 is configured to convert the above first charging voltage into a second charging voltage to charge the above battery to be controlled 15 for a preset time.

[0050] In actual operation, the above vehicle controller 12 and the above battery management system 13 are connected through a relay; the above vehicle controller 12 is further configured to control the relay to close when receiving the above charging wake-up signal, control the above battery to supply power to the above battery management system 13, and output a charging wake-up signal of the above battery management system 13.

[0051] Here, the above-mentioned storage battery generally powers the above-mentioned battery management system 13 in a low-voltage manner.

[0052] Furthermore, the type of the above-mentioned relay is a five-claw relay.

[0053] In actual operation, the above-mentioned vehicle controller 12 is connected to the above-mentioned relay through a third wire; the above-mentioned battery management system is connected to the above-mentioned relay through a fourth wire.

[0054] Furthermore, when the above-mentioned operating state is the full-function power-on mode of the above-mentioned to-be-controlled electric vehicle; the above-mentioned battery management system controls the above-mentioned power battery to end the charging state.

[0055] Here, the above-mentioned operating state being the full-function power-on mode of the above-mentioned to-be-controlled electric vehicle means that the above-mentioned to-be-controlled electric vehicle is in the ON gear.

[0056] Furthermore, when the above-mentioned remaining power is less than or equal to a preset threshold, the above-mentioned battery management system 13 controls the above-mentioned power battery to end the charging state.

[0057] Here, the above-mentioned remaining power being less than or equal to the preset threshold generally means that the remaining power is less than 20% of the above-mentioned power battery 14.

[0058] In actual operation, the above-mentioned to-be-controlled electric vehicle is a pure electric commercial vehicle.

[0059] An embodiment of the present invention provides a tram battery charging system, including: 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 tram to be controlled; the body controller is used to obtain the operating state and environmental parameters of the tram to be controlled; judge whether the operating state and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage acquisition 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; collect the real-time voltage value of the battery to be controlled based on the voltage acquisition period; judge 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; 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 woken up based on the charging wake-up signal of the battery management system, the vehicle controller is further used to collect the remaining power of the power battery; judge 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 perform a charging action on the battery to be controlled for a preset time. This system monitors the real-time voltage value of the battery to be controlled through the body controller, vehicle controller, and battery management system of the vehicle, so that there is no need to set up the above-mentioned battery health monitoring system to reduce the vehicle cost.

[0060] [[ID=③]]Embodiment 2

[0061] Based on the above embodiment, Figure 4 It is a schematic flowchart of a control method for a tram battery charging system provided by an embodiment of the present invention.

[0062] In this embodiment, the control method of the tram battery charging system is applied to the tram battery charging system in the above embodiment.

[0063] As can be seen from Figure 4 the control method includes:

[0064] Step S401: Obtain the operating state and environmental parameters of the to-be-controlled tram through the vehicle body controller; determine whether the operating state and environmental parameters meet the preset parameter requirements; if so, determine the preset voltage acquisition period of the to-be-controlled battery and the preset charging range of the to-be-controlled battery corresponding to the operating state and the environmental parameters based on the operating state and the environmental parameters; collect the real-time voltage value of the to-be-controlled battery based on the voltage acquisition period; 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.

[0065] Step S402: When the vehicle controller receives the charging wake-up signal, output the charging wake-up signal of the battery management system; when the battery management system is woken up based on the charging wake-up signal of the battery management system, 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.

[0066] Step S403: In response to the charging signal through the battery management system, control the power battery to perform a charging operation on the to-be-controlled battery for a preset time.

[0067] In one of the implementation manners, the operating state includes: the braking state of the to-be-controlled tram; the environmental parameters include: the environmental temperature and environmental humidity where the to-be-controlled tram is located; after step S401, the method further includes: the vehicle body controller is further configured to obtain the braking state, the environmental temperature, and the environmental humidity; based on preset parameters, adjust the voltage acquisition period according to the braking state, the environmental temperature, and the environmental humidity.

[0068] The control method of the tram battery supplementary charging system provided by the embodiment of the present invention has the same technical features as the tram battery supplementary charging system provided by 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 brevity of description, the specific working process of the control method of the tram battery supplementary charging system described above can refer to the corresponding process in the foregoing embodiment of the tram battery supplementary charging system, and will not be elaborated here.

[0069] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0070] 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 trolley battery charging system, characterized in that, Including: A body controller, a vehicle controller, a battery management system, a power battery, and a battery to be controlled 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 vehicle to be controlled; The body controller is used to obtain the running state and environmental parameters of the vehicle to be controlled; and judge whether the running state and environmental parameters meet the preset parameter requirements; If so, according to the running state and the environmental parameters, determine the preset voltage acquisition period of the battery to be controlled and the preset charging range of the battery to be controlled corresponding to the running state and the environmental parameters; based on the voltage acquisition period, collect the real-time voltage value of the battery to be controlled; Judge 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; The running state includes: the braking state of the vehicle to be controlled; the environmental parameters include: the environmental temperature and environmental humidity where the vehicle to be controlled is located; 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 woken up 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; judge 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 perform a charging action on the battery to be controlled for a preset time; the body controller is also used to obtain the braking state, the environmental temperature, and the environmental humidity; and adjust the voltage acquisition period based on preset parameters according to the braking state, the environmental temperature, and the environmental humidity.

2. The tram battery charging supplementary system according to claim 1, wherein The body controller is connected to the vehicle controller through a first wire; The body controller is also used to judge 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; wake up the vehicle controller through the first charging wake-up signal in the charging wake-up signal transmitted through the first wire.

3. The electric vehicle battery charging supplementary system according to claim 2, characterized in that The system further includes: a standby battery device connected to both the body controller and the vehicle controller; the standby battery device is connected to the vehicle controller through a second wire; The body controller is also used to judge whether the real-time voltage value is within the second sub-charging range of the charging range; when the real-time voltage value is within the second sub-charging range; start the standby battery device and wake up the vehicle controller through the second charging wake-up signal in the charging wake-up signal transmitted through the second wire.

4. The tram battery charging system according to claim 3, characterized in that, The value of the second sub-charging range is less than the value of the first sub-charging range.

5. The tram battery charging system according to claim 4, 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; the preset time is 45 minutes.

6. The tram battery charging system according to claim 1, characterized in that, 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 further configured to respond to the charging signal and control the power battery to output a first charging voltage; The voltage conversion module is configured to convert the first charging voltage into a second charging voltage to charge the battery to be controlled for a preset time.

7. The tram battery charging system according to claim 1, characterized in that, The vehicle controller is connected to the battery management system through a relay; The vehicle controller is further configured to, when receiving the charging wake-up signal, control the relay to close, control the battery to supply power to the battery management system, and output the charging wake-up signal of the battery management system.

8. The trolley battery charging system according to claim 7, wherein The type of the relay is a five-claw relay.

9. The tram battery charging supplementary system according to claim 1, characterized in that When the operating state is the full-function power-on mode of the tram to be controlled; the battery management system controls the power battery to end the charging state.

10. The trolley battery charging system according to claim 1, wherein 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.

11. A control method for a tram battery charging system, characterized in that, Applied to the battery replenishment system of the tram according to any one of claims 1 to 10, the method includes: Obtaining the operating state and environmental parameters of the tram to be controlled through the body controller; determining whether the operating state and environmental parameters meet the preset parameter requirements; if so, determining the preset voltage acquisition 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 operating state and the environmental parameters; collecting the real-time voltage value of the battery to be controlled based on the voltage acquisition period; determining whether the real-time voltage value is within the preset charging range; if so, waking up the vehicle controller through a charging wake-up signal; the operating state includes: the braking state of the tram to be controlled; the environmental parameters include: the environmental temperature and environmental humidity where the tram to be controlled is located; When the vehicle controller receives the charging wake-up signal, output the charging wake-up signal of the battery management system; when the battery management system is woken up based on the charging wake-up signal of the battery management system, 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; Through the battery management system, in response to the charging signal, control the power battery to perform a charging operation on the battery to be controlled for a preset time; Obtain the braking state, the environmental temperature, and the environmental humidity through the body controller; adjust the voltage acquisition period based on preset parameters according to the braking state, the environmental temperature, and the environmental humidity.

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