High-low voltage battery integrated control power supply system, method and working machine

Abstract

The application provides a high-low voltage battery integrated control power supply system and method and working machine. The system comprises a total power switch, an electric control module, a high-voltage battery pack, a low-voltage battery pack and a battery management module. The high-voltage battery pack, the low-voltage battery pack and the battery management module are integrally arranged in the same box. When the total power switch is closed, the electric control module sends a control instruction to the battery management module according to the closing state of the total power switch. The battery management module controls the high-voltage battery pack and the low-voltage battery pack to supply high-voltage power and low-voltage power to the whole vehicle according to the control instruction. By integrating the high-voltage battery pack, the low-voltage battery pack and the battery management module in the same box, the overall control of the high-voltage battery module and the low-voltage battery module is realized by the battery management module, the control process is simplified, and the integrated control of the high-voltage battery pack and the low-voltage battery pack is efficiently completed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power supply control, in particular to a high and low voltage battery integrated control power supply system, method and working machine. BACKGROUND

[0002] Electric vehicles and electric working machines gradually occupy a larger proportion in the market, and the main power parts include high voltage battery packs and low voltage battery packs, the high voltage battery packs are powered by power lithium batteries with a 600V voltage platform, and the low voltage battery packs are powered by lead-acid storage batteries or 24V lithium batteries with a 24V voltage platform.

[0003] Therefore, how to more simply realize the integrated control of the high voltage battery packs and the low voltage battery packs has become a technical problem to be solved by the person skilled in the art. SUMMARY

[0004] The present application provides a high and low voltage battery integrated control power supply system, method and working machine to solve the defect of complicated control of high voltage battery packs and low voltage battery packs in the prior art.

[0005] The present application provides a high and low voltage battery integrated control power supply system, comprising a total power switch, an electric control module, high voltage battery packs, low voltage battery packs and a battery management module.

[0006] The high voltage battery packs, the low voltage battery packs and the battery management module are integrally arranged in the same box, the high voltage battery packs and the low voltage battery packs are connected with the battery management module, the total power switch is connected with the electric control module, and the electric control module is further connected with the battery management module.

[0007] When the total power switch is closed, the electric control module sends a control instruction to the battery management module according to the closing state of the total power switch, and the battery management module controls the high voltage battery packs and the low voltage battery packs to supply high voltage power and low voltage power to the whole vehicle according to the control instruction.

[0008] The high and low voltage battery integrated control power supply system according to the present application further comprises a switch control module.

[0009] One end of the switch control module is connected with the battery management module, and the other end of the switch control module is connected with the total power switch and the low voltage power module.

[0010] The switch control module is used for controlling the on-off of the low voltage power module, the total power switch and the low voltage battery packs.

[0011] The high and low voltage battery integrated control power supply system according to the present application, the switch control module comprises a first sub-switch and a second sub-switch.

[0012] One end of the first sub-switch is connected with the battery management module, the other end of the first sub-switch is connected with a low-voltage power module, one end of the second sub-switch is connected with the battery management module, the other end of the second sub-switch is connected with the total power switch;

[0013] The first sub-switch is used for controlling the on-off of the low-voltage power module and the low-voltage battery pack, and the second sub-switch is used for controlling the on-off of the total power switch and the low-voltage battery pack.

[0014] According to the high-low voltage battery integrated control power supply system provided by the application, the switch control module further comprises a first diode and a second diode;

[0015] The first diode is connected in series between the second sub-switch and the battery management module, and the second diode is connected in series between the first sub-switch and the battery management module.

[0016] The first diode is used for controlling the battery management module to unidirectionally control the on or off of the second sub-switch, and the second diode is used for controlling the battery management module to unidirectionally control the on or off of the first sub-switch.

[0017] According to the high-low voltage battery integrated control power supply system provided by the application, the switch control module further comprises a first diode and a second diode;

[0018] The third diode is connected in series between the first sub-switch and the electronic control module, and the fourth diode is connected in series between the second sub-switch and the electronic control module.

[0019] The third diode is used for controlling the electronic control module to unidirectionally control the on or off of the first sub-switch, and the fourth diode is used for controlling the electronic control module to unidirectionally control the on or off of the second sub-switch.

[0020] According to the high-low voltage battery integrated control power supply system provided by the application, the total power switch comprises an ignition device, a first power switch, a second power switch and a third power switch.

[0021] The first power switch is connected with the ACC of the ignition device, the second power switch is connected with the first ON electric of the ignition device, the third power switch is connected with the second ON electric of the ignition device, and the ignition device is further connected with the electronic control module.

[0022] According to the high-low voltage battery integrated control power supply system provided by the application, the switch control module further comprises a voltage conversion module.

[0023] The input end of the voltage conversion module is connected with the high-voltage battery pack, the output end of the voltage conversion module is connected with the low-voltage battery pack, and the voltage conversion module is also connected with the electric control module.

[0024] The high-low voltage battery integrated control power supply system provided by the application further comprises an interlock switch and a self-reset power switch.

[0025] One end of the interlock switch is connected with the battery management module, and the other end of the interlock switch is connected with the low-voltage battery pack, and the self-reset power switch is connected in series between the low-voltage battery pack and the battery management module.

[0026] The self-reset power switch and the interlock switch are used for self-checking the low-voltage battery pack.

[0027] The application further provides a high-low voltage battery integrated control power supply method, which is applied to the high-low voltage battery integrated control power supply system as described in any one of the above.

[0028] When the battery management module and the low-voltage battery pack are fault-free, the electric control module controls the low-voltage battery pack to perform low-voltage power supply through the battery management module according to the closing state of the total power switch.

[0029] When the battery management module and / or the low-voltage battery pack is faulty, the electric control module converts the voltage of the high-voltage battery pack into a target voltage through the voltage conversion module, and performs whole vehicle power supply through the target voltage according to the closing state of the total power switch.

[0030] The application further provides a working machine, which comprises the high-low voltage battery integrated control power supply system as described in any one of the above or is used for executing the high-low voltage battery integrated control power supply method as described above.

[0031] The application further provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the high-low voltage battery integrated control power supply method as described in any one of the above when executing the program.

[0032] The application further provides a non-transitory computer readable storage medium, which stores a computer program, and the computer program is executable on a processor to implement the high-low voltage battery integrated control power supply method as described in any one of the above.

[0033] The application further provides a computer program product, which comprises a computer program, and the computer program is executable on a processor to implement the high-low voltage battery integrated control power supply method as described in any one of the above.

[0034] This invention provides an integrated high- and low-voltage battery control and power supply system, method, and operating machinery. The system includes a main ignition switch, an electronic control module, a high-voltage battery pack, a low-voltage battery pack, and a battery management module. The high-voltage battery pack, low-voltage battery pack, and battery management module are integrated and housed within the same enclosure. Both the high-voltage and low-voltage battery packs are connected to the battery management module. The main ignition switch is connected to the electronic control module, which in turn is connected to the battery management module. When the main ignition switch is closed, the electronic control module sends control commands to the battery management module based on the switch's closing state. The battery management module then controls the high-voltage and low-voltage battery packs to provide high-voltage and low-voltage power to the vehicle according to the control commands. By integrating the high-voltage battery pack, low-voltage battery pack, and battery management module into the same enclosure, and by using the battery management module to uniformly control both the high-voltage and low-voltage battery modules, the control process is simplified, and the integrated control of the high-voltage and low-voltage battery packs is efficiently achieved. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of the high and low voltage battery integrated control and power supply system provided in an embodiment of the present invention;

[0037] Figure 2 This is a circuit diagram of the high and low voltage battery integrated control and power supply system provided in an embodiment of the present invention;

[0038] Figure 3 This is a schematic flowchart of the high and low voltage battery integrated control power supply method provided in an embodiment of the present invention.

[0039] Figure 4 This is a schematic diagram of the structure of the electronic device provided by the present invention.

[0040] Figure label:

[0041] 1. Electronic control module; 2. Battery management module; 3. Main switch; 31. Ignition device; 32. First switch; 33. Second current collector; 34. Third switch; 4. Low-voltage battery pack; 5. High-voltage battery pack; 6. Voltage conversion module; 71. First sub-switch; 72. Second sub-switch; 8. Interlock relay; 9. Self-resetting power switch; A. Housing; D01. First diode; D02. Second diode; D03. Third diode; D04. Fourth diode. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0043] The following is combined Figures 1-4 This invention describes an integrated high- and low-voltage battery control power supply system, method, and operating machinery.

[0044] Figure 1 This is a schematic diagram of the structure of the high and low voltage battery integrated control and power supply system provided in an embodiment of the present invention. Figure 2 This is a circuit diagram of the high and low voltage battery integrated control power supply system provided in an embodiment of the present invention.

[0045] like Figure 1 and Figure 2 As shown in the figure, an integrated high- and low-voltage battery control and power supply system provided by this embodiment of the invention includes: a main ignition switch 3, an electronic control module 1, a high-voltage battery pack 5, a low-voltage battery pack 4, and a battery management module 2; wherein, the high-voltage battery pack 5, the low-voltage battery pack 4, and the battery management module 2 are integrated and disposed inside the same housing A, the high-voltage battery pack 5 and the low-voltage battery pack 4 are both connected to the battery management module 2, the main ignition switch 3 is connected to the electronic control module 1, and the electronic control module 1 is also connected to the battery management module 2; when the main ignition switch 3 is closed, the electronic control module 1 sends a control command to the battery management module 2 according to the closed state of the main ignition switch, and the battery management module 2 controls the high-voltage battery pack 5 and the low-voltage battery pack 4 to provide high-voltage and low-voltage power supply to the vehicle according to the control command.

[0046] In a specific implementation process, the main role of the high-voltage battery pack 5 is to drive the working machine to work and provide power support for the working machine, and the role of the low-voltage battery pack 4 is to provide low-voltage power supply for the low-voltage electrical equipment inside the working machine. The vehicle control unit, that is, the electric control module 1, is the whole vehicle controller of the electric working machine, mainly responsible for coordinating the work of various parts of the vehicle such as the working machine battery, gearbox, motor and engine, and is the general controller of the vehicle power system. The general power door 3 refers to the general power door related part of the working machine, that is, the gear of the key, the ACC gear of the key, the ON gear of the key, etc. The main role of the battery management module 2 is to realize the overall control of the high-voltage battery pack 5 and the low-voltage battery pack 4. The battery management module 2 can be integrated on the control structure of the high-voltage battery pack 5, thereby eliminating the need to separately set up a low-voltage battery pack 4 control module. Through the integrated battery management module 2, the high-voltage battery pack 5 and the low-voltage battery pack 4 are controlled as a whole, effectively simplifying the control logic and reducing the manufacturing cost of the battery, which is more helpful for the manufacturing of the electric working machine.

[0047] The overall working process is that the operator sets the switch to the corresponding closed state through the general power door 3, each different closed state corresponds to a different power supply strategy, including starting power supply, normal power supply, power supply and the like. Therefore, the electric control module 1 will first detect the state of the general power door 3, and after determining the state of the general power door 3, it will send corresponding control instructions to the battery management module 2 through the battery management module 2. The battery management module 2 will control the corresponding low-voltage battery pack 4 and high-voltage battery pack 5 to work according to the corresponding control instructions. For example, if the instruction of the general power door 3 is to start power supply and low-voltage power supply, the battery management module 2 will start the high-voltage battery pack 5 and the low-voltage battery pack 4 to supply power and low-voltage power. If the control instruction of the general power door 3 is to turn on the low-voltage electrical equipment, the battery management module 2 will only start the low-voltage battery pack 4 to supply low-voltage power for the normal use of the low-voltage electrical equipment inside the working machine.

[0048] By centrally arranging the low-voltage battery pack 4, the high-voltage battery pack 5 and the battery management module 2 in the same box A, for example, in the same non-standard box, the connection of the wire harness between the high-voltage battery pack 5 and the low-voltage battery pack 4 is simplified, and the cost of the battery is effectively saved.

[0049] Further, as shown in Figure 2 On the basis of the above embodiment, the high-low voltage battery integrated control power supply system in the embodiment further includes a switch control module; one end of the switch control module is connected with the battery management module 2, and the other end of the switch control module is connected with the general power door 3 and the low-voltage electrical module; the switch control module is used for controlling the on-off of the low-voltage electrical module and the general power door 3 and the low-voltage battery pack 4.

[0050] The switch control module comprises a first sub-switch 71 and a second sub-switch 72. One end of the first sub-switch 71 is connected with the battery management module 2, and the other end of the first sub-switch 71 is connected with the low-voltage power consumption module. One end of the second sub-switch 72 is connected with the battery management module 2, and the other end of the second sub-switch 72 is connected with the total power door 3. The first sub-switch 71 is used for controlling the on-off of the low-voltage power consumption module and the low-voltage battery pack 4, and the second sub-switch 72 is used for controlling the on-off of the total power door 3 and the low-voltage battery pack 4.

[0051] Specifically, the switch control module controls the power consumption switch, the low-voltage power consumption includes the normal power consumption and other low-voltage power consumption equipment such as air conditioner, audio and other low-voltage power consumption equipment in the vehicle, and the normal power mainly includes the power consumption corresponding to the total power door 3. The electric control module 1 controls the conduction or disconnection of the first sub-switch 71 and the second sub-switch 72. When it is needed to provide normal power supply, the electric control module 1 controls the second sub-switch 72 to be closed, so that the low-voltage battery pack 4 performs normal power output supply, and the total power door 3 enters the working mode. When it is needed to supply power to the low-voltage power consumption equipment, the electric control module 1 controls the first sub-switch 71 to be closed, so that the low-voltage battery pack 4 can perform 24V low-voltage battery power supply, thereby ensuring the low-voltage power supply of the working machine. The first sub-switch 71 and the second sub-switch 72 can realize separate power supply control of the normal power and the low-voltage power consumption, and the two do not affect each other, thereby effectively ensuring the power supply, and the normal power supply and the low-voltage power supply can be controlled separately, thereby ensuring the power consumption safety and fault maintenance and the like.

[0052] Further, on the basis of the above embodiment, as shown in Figure 2 The switch control module further comprises a first diode D01 and a second diode D02. The first diode D01 is connected in series between the second sub-switch 72 and the battery management module 2, and the second diode D02 is connected in series between the first sub-switch 71 and the battery management module 2. The first diode D01 is used for controlling the battery management module 2 to control the conduction or disconnection of the second sub-switch 72 in one direction, and the second diode D02 is used for controlling the battery management module 2 to control the conduction or disconnection of the first sub-switch 71 in one direction.

[0053] Specifically, the first diode D01 is arranged between the second sub-switch 72 and the battery management module 2, so that the battery management module 2 receives the control of the battery management module 2 in one direction, and the scenario that the battery management module 2 is controlled at will by the electric control module 1 does not occur, and the current backflow of the second sub-switch 72 does not cause damage to the battery management module 2. Similarly, the second diode D02 can form one-way control between the first sub-switch 71 and the battery management module 2. As shown in Figure 2As shown, the first diode D01 and the second diode D02 are also located inside the housing A, which can reduce the cost of the wiring harness. Through the unidirectional conduction control of the first diode D01 and the second diode D02, the confusion of the control logic can be effectively avoided, and the current backflow between the electronic control module 1 and the battery management module 2 will not occur, thus effectively ensuring electrical safety.

[0054] Furthermore, such as Figure 2 As shown, based on the above embodiments, the high and low voltage battery integrated control power supply system in this embodiment further includes a voltage conversion module 6; the input terminal of the voltage conversion module 6 is connected to the high voltage battery pack 5, the output terminal of the voltage conversion module 6 is connected to the low voltage battery pack 4, and the voltage conversion module 6 is also connected to the electronic control module 1; when the low voltage battery pack 4 fails and / or the battery management module 2 fails, the electronic control module 1 converts the voltage of the high voltage battery pack 5 into a target voltage through the voltage conversion module 6, and supplies power to the whole vehicle through the target voltage.

[0055] Specifically, the voltage conversion module 6, also known as the DC-DC module, primarily functions to convert the high voltage of the high-voltage battery pack 5 into a target voltage, such as 24V. This allows the high-voltage battery pack 5 to charge the low-voltage battery pack 4, ensuring normal low-voltage power supply. It can also recharge the low-voltage battery pack 4 when its power is insufficient. Furthermore, it can directly convert the voltage of the high-voltage battery pack 5 into the target voltage for low-voltage supply, ensuring the normal operation of low-voltage electrical equipment.

[0056] Furthermore, such as Figure 2 As shown, based on the above embodiments, the high and low voltage battery integrated control power supply system in this embodiment further includes a third diode D03 and a fourth diode D04; the third diode D03 is connected in series between the first sub-switch 71 and the electronic control module 1, and the fourth diode D04 is connected in series between the second sub-switch 72 and the electronic control module 1; the third diode D03 is used to control the electronic control module 1 to unidirectionally control the first sub-switch 71 to turn on or off, and the fourth diode D04 is used to control the electronic control module 1 to unidirectionally control the second sub-switch 72 to turn on or off.

[0057] Specifically, a third diode D03 is placed between the electronic control module 1 and the first sub-switch 71, ensuring unidirectional control between them and preventing signal interference from the first sub-switch 71. Similarly, a fourth diode D04 is placed between the electronic control module 1 and the second sub-switch 72, preventing the current signal from the second sub-switch 72 from affecting the control of the electronic control module 1. Figure 2As shown, diodes are respectively installed on the control lines of the battery management module 2 and the electronic control module 1, so that the control current between the battery management module 2 and the electronic control module 1 will not interfere with each other, effectively ensuring the safe control of the second sub-switch 72 and the first sub-switch 71.

[0058] Furthermore, such as Figure 2 As shown, based on the above embodiments, the main power switch 3 in this embodiment includes an ignition device 31, a first power switch 32, a second power switch 33, and a third power switch 34. The first power switch 32 is connected to the ACC of the ignition device 31, the second power switch 33 is connected to the first ON of the ignition device 31, and the third power switch 34 is connected to the second ON of the ignition device 31. The ignition device 31 is also connected to the electronic control module 1. When the ignition device 31 is in the ACC state, the first power switch 32 is turned on, and the electronic control module 1 controls the low-voltage battery pack 4 to provide ACC power. When the ignition device 31 is in the first ON state, the second power switch 33 is turned on, and the electronic control module 1 controls the low-voltage battery pack 4 to provide the first ON power. When the ignition device 31 is in the second ON state, the third power switch 34 is turned on, and the electronic control module 1 controls the low-voltage battery pack 4 to provide the second ON power.

[0059] Specifically, the main ignition switch 3 is connected to the constant power distribution via a 10A fuse. The operator selects to switch the ignition device 31 from the LOCK position to the ACC position according to actual operational needs. The ignition device 31 then controls the first ignition switch 32 to close via a hardwire, allowing low-voltage electrical equipment connected to the ACC to operate normally, such as the infotainment system inside the work machinery. When the ignition device 31 is switched to the ON position, it controls the second and third ignition switches 33 and 34 to close via a hardwire. The second ignition switch 33 provides power to vehicle safety-related control units, while the third ignition switch 34 provides ON power to all control units in the vehicle except for those related to vehicle safety, thus ensuring the normal operation of all electrical equipment in the work machinery.

[0060] Furthermore, based on the above embodiments, such as Figure 2 As shown, the high and low voltage battery integrated control power supply system in this embodiment also includes an interlock switch and a self-resetting power switch 9; one end of the interlock switch is connected to the battery management module 2, and the other end of the interlock switch is connected to the low voltage battery pack 4; the self-resetting power switch 9 is connected in series between the low voltage battery pack 4 and the battery management module 2; the self-resetting power switch 9 and the interlock switch are used to perform self-testing on the low voltage battery pack 4.

[0061] Specifically, when the work machine has a power demand, a preset time length of pressing the self-resetting power switch 9 can be selected, for example, 3 seconds of pressing the self-resetting power switch 9, and then the battery management module 2 starts to enter the preparation mode, and the low-voltage battery pack 4 starts to perform self-checking. During the self-checking process, if there is a fault, the fault lamp is lit to prompt the operator to troubleshoot. If there is no fault, the battery management module 2 wakes up the voltage conversion module 6 and performs self-checking, and after the voltage conversion module 6 is fault-free, the voltage conversion module 6 starts to collect the current, voltage and temperature of the low-voltage battery pack 4 to ensure the safety of the low-voltage battery pack 4. The interlocking switch is associated with the self-resetting power switch 9, and through the interlocking relay 8, the battery management module 2 can also be effectively prevented from short-circuiting, effectively ensuring the safety of the battery management module 2.

[0062] Based on the same general inventive concept, the application also protects a high-low voltage battery integrated control power supply method.

[0063] Figure 3 is a flowchart of the high-low voltage battery integrated control power supply method provided by the embodiment of the application.

[0064] As shown in Figure 3 The high-low voltage battery integrated control power supply method provided by the embodiment of the application can be the high-low voltage battery integrated control power supply system of any of the above embodiments, and the method mainly includes the following steps:

[0065] 301、When the battery management module and the low-voltage battery pack are fault-free, the electric control module controls the low-voltage battery pack to perform low-voltage power supply according to the closing state of the total power switch through the battery management module.

[0066] In the application process, the low-voltage power supply can be controlled by the battery management module 2 and the electric control module 1, and in normal operation, the total power switch 3 will be switched to the corresponding position, and the electric control module 1 will control the low-voltage battery pack 4 to perform low-voltage power supply through the battery management module 2 according to the closing state of the total power switch. That is, if the battery management module 2 is switched to ACC, the electric control module 1 controls the low-voltage battery pack 4 to perform low-voltage ACC power supply, and if it is switched to ON power, it controls the low-voltage battery pack 4 to perform ON power supply, and no longer enumerates each case.

[0067] 302、When the battery management module and / or the low-voltage battery pack has a fault, the electric control module converts the voltage of the high-voltage battery pack into a target voltage through the voltage conversion module, and performs whole vehicle power supply through the target voltage according to the closing state of the total power switch.

[0068] When the battery management module 2 and / or the low-voltage battery pack 4 fails, at this time the electric control module 1 directly controls the power supply, the electric control module 1 selects the voltage of the high-voltage battery pack 5 to be converted into the target voltage, and then the electric control module 1 supplies power to the whole vehicle according to the power demand of the total electric door.

[0069] Overall, the work flow is described. First, when the vehicle has power demand, first press the self-reset power switch 9 for three seconds, then the low-voltage battery pack 4 enters the preparation mode, the low-voltage battery pack 4 performs self-checking, after self-checking, if the low-voltage battery pack 4 has a fault, a fault prompt is issued. If there is no fault, the battery management module 2 wakes up the voltage conversion module 6, the voltage conversion module 6 performs self-checking, if there is a fault, a fault alarm prompt is issued, and if there is no fault, the voltage value, temperature value and current value of the low-voltage battery pack 4 are collected, according to the size of the voltage value, current value and temperature value, the state of the low-voltage battery pack 4 and other parameters can be understood in real time. And the battery management module 2 controls the conduction or disconnection of the second sub-switch 72 through the series connection of the diode, the constant power output end of the low-voltage battery pack 4 is connected to the chassis fuse, and the constant power distribution of the whole vehicle is distributed, and the total electric door 3 is connected to the constant power distribution through the 10A fuse.

[0070] The operator will put the ignition device 31 from the LOCK gear to the ACC gear according to the demand, at this time the ignition device 31 will control the first electric switch 32 to close and conduct, so that the low-voltage battery pack 4 supplies power to the information entertainment device hanging on the ACC. When the operator puts the ignition device 31 from the LOCK gear to the ON gear according to the demand, the ignition device 31 will control the second electric switch 33 and the third electric switch 34 to close and conduct, the second electric switch 33 supplies ON power to the driving safety related control unit, and the third electric switch 34 supplies ON power to the other control units of the whole vehicle except driving safety, so as to realize different power supply control of the low-voltage battery pack 4 according to the demand of the ignition control module.

[0071] Then, the battery management module 2 detects the ON signal, if the ON signal is detected, the battery management module 2 starts the detection management of the high-voltage battery pack 5, the battery management module 2 interacts with the vehicle and the voltage conversion module 6 through the CAN line, at the same time, the battery management module 2 collects and outputs the relevant information of the high-voltage battery pack 5, judges whether there is an alarm of the high-voltage battery pack 5, if there is an alarm, the fault is eliminated and repaired, if there is no alarm, the first sub-switch 71 is controlled to output, and the output loop is increased with a diode protection. After the monitoring management of the high-voltage battery pack 5, the electric control module 1 is powered by the 10A power distribution insurance, the electric control module 1 communicates with the vehicle through the bus, after the electric control module 1 receives the ON signal, the vehicle control system is managed, the electric control module 1 outputs the normal power interlocking signal, controls the second sub-switch 72 to keep the working state, and ensures that the vehicle can be temporarily operated when the low-voltage battery pack 4 fails. For example, when the low-voltage battery pack 4 fails, the electric control module 1 activates the voltage conversion module 6, the voltage conversion module 6 converts the high-voltage battery pack 5 into 24V low-voltage, and then controls the vehicle power supply. Therefore, through the electric control module 1 and the voltage conversion module 6, even if the low-voltage battery pack 4 or the related circuit fails, the voltage of the high-voltage battery pack 5 can be converted to supply low-voltage power of the vehicle, and the power consumption is ensured.

[0072] After ensuring that the vehicle has power supply, in the normal working state, the battery management module 2 monitors the power of the 24V low-voltage battery pack 4 in real time. When the current of the low-voltage battery pack 4 is lower than 30% or the voltage is lower than 22V, the voltage conversion module 6 is powered through the 10A fuse of the normal power output end, connected with the vehicle through the CAN bus, and can also monitor the vehicle power current in real time. When the discharge current of the low-voltage battery pack 4 is greater than 20A, or the current of the low-voltage battery pack 4 is lower than 30% or the voltage is lower than 22V, the voltage conversion module 6 and the high-voltage power distribution circuit are awakened. The voltage conversion module 6 converts the high voltage of the high-voltage battery pack 5 into 24V voltage to charge the low-voltage battery pack 4, and stops charging when the power of the low-voltage battery pack 4 exceeds 95%. Then, the ON signal is detected, and when the battery management module 2 detects that the ON signal lasts for 5s without signal, it indicates that there is no high-voltage power demand at this time, and the vehicle enters the low-power sleep mode, and only monitors the parameter state of the low-voltage battery pack 4. The battery management module 2 closes the first sub-switch 71, and the vehicle only has normal power output. If the vehicle has no power demand at this time, the operator can close the low-voltage battery pack 4 by pressing the self-reset power switch 9 for a certain time, the low-voltage battery pack 4 no longer supplies power to the outside, the battery management module 2 controls the interlocking relay 8 to be disconnected, and all power-consuming devices and control units stop working, and the vehicle as a whole enters the sleep parking state.

[0073] Based on the same general inventive concept, the application also protects a working machine comprising a high-low voltage battery integrated control power supply system as in any of the above embodiments, or for performing a high-low voltage battery integrated control power supply method as in the above embodiments. For example, the working machine comprises a pure electric working machine or a hybrid working machine, etc.

[0074] Figure 4 is a structural schematic diagram of an electronic device provided by the application.

[0075] As Figure 4 shown, the electronic device can include a processor 410, a communications interface 420, a memory 430, and a communications bus 440, wherein the processor 410, the communications interface 420, and the memory 430 communicate with each other through the communications bus 440. The processor 410 can invoke the logic instructions in the memory 430 to execute a high-low voltage battery integrated control power supply method, which includes: when the battery management module and the low-voltage battery pack are fault-free, the electric control module controls the low-voltage battery pack to perform low-voltage power supply through the battery management module according to the closing state of the total power door; when the battery management module and / or the low-voltage battery pack are fault-free, the electric control module converts the voltage of the high-voltage battery pack into a target voltage through a voltage conversion module, and performs whole vehicle power supply through the target voltage according to the closing state of the total power door.

[0076] In addition, the logic instructions in the memory 430 described above can be implemented in the form of a software functional unit and sold or used as an independent product when used, which can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the method described in the various embodiments of the application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various program code storage media.

[0077] In another aspect, the present application also provides a computer program product comprising a computer program, which can be stored on a non-transitory computer readable storage medium, and the computer program is executable by a processor to enable a computer to perform the high and low voltage battery integrated control power supply method provided by the above-mentioned methods, which comprises: when the battery management module and the low voltage battery pack are fault-free, the electronic control module controls the low voltage battery pack to perform low voltage power supply through the battery management module according to the closing state of the total power door; when the battery management module and / or the low voltage battery pack are fault-free, the electronic control module converts the voltage of the high voltage battery pack into a target voltage through a voltage conversion module, and performs vehicle power supply through the target voltage according to the closing state of the total power door.

[0078] In another aspect, the present application also provides a non-transitory computer readable storage medium having a computer program stored thereon, and the computer program is executable by a processor to implement the high and low voltage battery integrated control power supply method provided by the above-mentioned methods, which comprises: when the battery management module and the low voltage battery pack are fault-free, the electronic control module controls the low voltage battery pack to perform low voltage power supply through the battery management module according to the closing state of the total power door; when the battery management module and / or the low voltage battery pack are fault-free, the electronic control module converts the voltage of the high voltage battery pack into a target voltage through a voltage conversion module, and performs vehicle power supply through the target voltage according to the closing state of the total power door.

[0079] The device embodiments described above are only schematic, wherein the units illustrated as separate components can or can not be physically separate, and the components illustrated as units can or can not be physical units, i.e., can be located in one place or can be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment scheme. Those skilled in the art can understand and implement without creative labor.

[0080] From the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus necessary universal hardware platforms, and of course can also be realized by hardware. Based on such understanding, the above technical solutions, essentially or in terms of the contribution to the prior art, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0081] It should be pointed out finally that the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit the same; and although the present application has been described in detail with reference to the foregoing embodiments, it should be appreciated by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features thereof can be replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high- and low-voltage battery integrated control and power supply system, characterized in that, include: Main power switch, electronic control module, high-voltage battery pack, low-voltage battery pack, battery management module, and voltage conversion module; The high-voltage battery pack, the low-voltage battery pack, and the battery management module are integrated inside the same enclosure. The high-voltage battery pack and the low-voltage battery pack are both connected to the battery management module. The main power switch is connected to the electronic control module, and the electronic control module is also connected to the battery management module. The input terminal of the voltage conversion module is connected to the high-voltage battery pack, the output terminal of the voltage conversion module is connected to the low-voltage battery pack, and the voltage conversion module is also connected to the electronic control module. When the main ignition switch is closed, assuming there is no fault in the battery management module and the low-voltage battery pack, the electronic control module sends a control command to the battery management module according to the closed state of the main ignition switch. The battery management module then controls the high-voltage battery pack and the low-voltage battery pack to provide high-voltage and low-voltage power to the vehicle according to the control command. When the battery management module and / or the low-voltage battery pack malfunctions, the electronic control module converts the voltage of the high-voltage battery pack into a target voltage through the voltage conversion module, and supplies power to the vehicle through the target voltage according to the closed state of the main ignition switch. It also includes interlock switches and self-resetting power switches; One end of the interlock switch is connected to the battery management module, and the other end of the interlock switch is connected to the low-voltage battery pack. The self-resetting power switch is connected in series between the low-voltage battery pack and the battery management module. The self-resetting power switch and the interlock switch are used to perform self-testing on the low-voltage battery pack; Press the self-reset power switch for 3 seconds, and the battery management module will enter the preparation mode. The low-voltage battery pack will start self-testing. If a fault is found during the self-test, the fault light will illuminate to prompt the operator to troubleshoot and repair the fault. If there is no fault, the battery management module wakes up the voltage conversion module and performs a self-test. If the voltage conversion module fails, it begins to collect current, voltage and temperature information of the low-voltage battery pack to ensure the power safety of the low-voltage battery pack. The interlock switch and the self-reset power switch are interconnected and prevent the battery management module from short-circuiting through the interlock relay.

2. The high and low voltage battery integrated control and power supply system according to claim 1, characterized in that, It also includes a switch control module; One end of the switch control module is connected to the battery management module, and the other end of the switch control module is connected to the main power switch and the low-voltage power module. The switch control module is used to control the connection and disconnection of the low-voltage power module, the main switch, and the low-voltage battery pack.

3. The high and low voltage battery integrated control and power supply system according to claim 2, characterized in that, The switch control module includes a first sub-switch and a second sub-switch; One end of the first sub-switch is connected to the battery management module, and the other end of the first sub-switch is connected to the low-voltage power module. One end of the second sub-switch is connected to the battery management module, and the other end of the second sub-switch is connected to the main power switch. The first sub-switch is used to control the connection between the low-voltage power module and the low-voltage battery pack, and the second sub-switch is used to control the connection between the main power switch and the low-voltage battery pack.

4. The high and low voltage battery integrated control and power supply system according to claim 3, characterized in that, The switch control module further includes a first diode and a second diode; The first diode is connected in series between the second sub-switch and the battery management module, and the second diode is connected in series between the first sub-switch and the battery management module; The first diode is used to control the battery management module to unidirectionally control the second sub-switch to turn on or off, and the second diode is used to control the battery management module to unidirectionally control the first sub-switch to turn on or off.

5. The high and low voltage battery integrated control and power supply system according to claim 3, characterized in that, It also includes a third diode and a fourth diode; The third diode is connected in series between the first sub-switch and the electronic control module, and the fourth diode is connected in series between the second sub-switch and the electronic control module; The third diode is used to control the electronic control module to unidirectionally control the first sub-switch to turn on or off, and the fourth diode is used to control the electronic control module to unidirectionally control the second sub-switch to turn on or off.

6. The high and low voltage battery integrated control and power supply system according to claim 1, characterized in that, The main switch includes an ignition device, a first switch, a second switch, and a third switch; The first ignition switch is connected to the ACC of the ignition device, the second ignition switch is connected to the first ON of the ignition device, the third ignition switch is connected to the second ON of the ignition device, and the ignition device is also connected to the electronic control module.

7. A method for integrated control and power supply of high and low voltage batteries, characterized in that, The method, applied to the high- and low-voltage battery integrated control power supply system as described in any one of claims 1-6, comprises: When the battery management module and the low-voltage battery pack are fault-free, the electronic control module controls the low-voltage battery pack to provide low-voltage power supply through the battery management module according to the closed state of the main switch. When the battery management module and / or the low-voltage battery pack malfunctions, the electronic control module converts the voltage of the high-voltage battery pack into a target voltage through the voltage conversion module, and supplies power to the entire vehicle through the target voltage according to the closed state of the main ignition switch. Press the self-reset power switch for 3 seconds, and the battery management module will enter the preparation mode, and the low-voltage battery pack will begin self-testing. During the self-test, if a fault is found, a fault light will illuminate to prompt the operator to troubleshoot and repair the fault. If there is no fault, the battery management module will wake up the voltage conversion module and perform a self-test. If the voltage conversion module fails, it will begin collecting current, voltage, and temperature information of the low-voltage battery pack to ensure the electrical safety of the low-voltage battery pack. The interlock switch is interconnected with the self-reset power switch, and through the interlock relay, it prevents short circuits in the battery management module.

8. A type of operating machinery, characterized in that, The operating machinery includes the high and low voltage battery integrated control power supply system as described in any one of claims 1-6, or is used to perform the high and low voltage battery integrated control power supply method as described in claim 7.

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