Power battery insulation system and control method thereof, electronic equipment and automobile

Abstract

A power battery insulation system and control method thereof, electronic equipment and automobile, including detecting a vehicle key insertion signal, when the key insertion signal is invalid, judging whether the first diesel heater switch signal is valid; when the first diesel heater switch signal is valid, the system enters a diesel heater heating mode, the all-in-one controller, the vehicle controller, the battery management system and the diesel heater heating controller are powered, judging whether the second diesel heater switch signal is valid; when the second diesel heater switch signal is valid, judging whether the diesel heater sleep mode signal is valid, when the diesel heater sleep mode signal is valid, the system enters a diesel heater sleep mode, the all-in-one controller, the vehicle controller, the battery management system and the diesel heater heating controller are powered off; in the diesel heater sleep mode, the main controller is not awakened, judging whether the system sleep time is greater than a threshold, if the system sleep time is greater than the threshold, the system enters the diesel heater heating mode again. Automatic adjustment of the diesel heater is achieved, and the intelligent automation of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle body electrical control, and in particular to a power battery insulation system and a control method thereof, an electronic device and a vehicle. Background Art

[0002] With the continuous development of new energy technology, more and more commercial vehicles are beginning to use new energy batteries as a power source. However, the batteries of new energy commercial vehicles are usually very sensitive to temperature and need to be in a suitable charging and discharging temperature range. Once the temperature exceeds or falls below this temperature range, its charging and discharging will be greatly affected. In low temperature environments in winter, the performance of new energy commercial vehicle batteries is often affected, resulting in reduced power performance of the entire vehicle, and then a reduction in the vehicle's mileage. Therefore, insulation measures for new energy commercial vehicle batteries are particularly important. Insulation measures can help solve the problem of reduced endurance in low temperatures, reduce battery performance degradation caused by temperature changes within a stable operating temperature, and thus improve the performance and safety of the entire vehicle.

[0003] In the prior art, there are two main power battery insulation solutions:

[0004] (1) Selecting materials with good thermal insulation properties, such as thermal insulation foam or thermal insulation cotton, for new energy commercial vehicle battery packs can effectively reduce the impact of low temperature on the battery. At the same time, maintain the sealing around the battery pack to prevent cold air from entering. The advantages of this method are low cost and easy operation, but the disadvantage is that the thermal insulation effect is unstable and it cannot achieve uniform temperature inside the lithium battery.

[0005] (2) Perform PTC heating on the power battery during driving or charging, and avoid charging in extremely cold conditions to avoid affecting battery performance. However, this method has a fixed application scenario. When the vehicle is parked in a cold environment for a long time, the battery cannot be heated, causing the battery performance to deteriorate.

[0006] At the same time, the existing battery insulation solutions lack intelligent control and are unable to adjust the insulation method and time in real time according to the actual state of the battery and environmental conditions, resulting in problems such as energy waste or battery overheating. Summary of the invention

[0007] In view of the deficiencies in the prior art, an object of the present invention is to provide a power battery insulation system and a control method thereof, an electronic device and a vehicle, so as to solve the problems in the background technology.

[0008] The above object of the present invention is achieved through the following technical solutions:

[0009] A power battery insulation system comprises a main controller, the main controller is used to control the low-voltage power distribution of the whole vehicle, and the main controller is electrically connected to a water pump;

[0010] In a low-voltage environment, the main controller is powered by a battery; in a high-voltage environment, the main controller is powered by an all-in-one controller;

[0011] The main controller is used to control the operation of the insulation system, and the main controller is used to switch the diesel heating mode of the insulation system;

[0012] The main controller is electrically connected to a vehicle controller, and the vehicle controller is used to schedule the operation of the insulation system;

[0013] It also includes a battery management system, which is used to detect the status of the power battery;

[0014] The controller, vehicle controller VCU, battery management system BMS and all-in-one controller ICU are used together to control the power supply to the insulation system.

[0015] A control method for a power battery insulation system, comprising:

[0016] Detect whether the vehicle key insertion signal is valid. When the vehicle key insertion signal is valid, execute according to the normal power distribution process;

[0017] When the vehicle key insertion signal is invalid, determining whether the first diesel heater switch signal is valid, and when the first diesel heater switch signal is invalid, executing according to the normal power distribution process;

[0018] When the first diesel heater switch signal is valid, the diesel heater mode is entered, and the main controller supplies power to the vehicle controller, diesel heater controller, battery management system and all-in-one controller, while disconnecting all load power supplies of the vehicle.

[0019] In a preferred example, the present invention can be further configured as follows: after entering the diesel heater mode, the diesel heater switch signal is detected again to see if it is valid, if not, the normal power distribution process is executed; if valid, further detection is performed to see if the diesel heater sleep mode signal is received, if not, the diesel heater mode is re-entered.

[0020] In a preferred example, the present invention can be further configured as follows: when a diesel heater sleep mode signal is received, the power supply of the vehicle controller, diesel heater controller, battery management system and all-in-one controller is disconnected, and the sleep indication position is set to 1, the main controller stops sending messages, enters sleep mode, and waits to be awakened.

[0021] In a preferred example, the present invention can be further configured as follows: determine whether the main controller is awakened, and when awakened, determine whether the diesel heating switch is valid, and when the diesel heating switch is valid, re-enter the diesel heating mode; when the diesel heating switch is invalid, execute according to the normal power distribution process.

[0022] In a preferred example, the present invention can be further configured as follows: setting a sleep waiting time threshold, when the waiting time is greater than the threshold, re-entering the diesel heating mode; otherwise, continuing the sleep waiting.

[0023] In a preferred example, the present invention can be further configured as follows: in sleep mode, the main controller prohibits switching of the vehicle power gear, and in this mode, when the vehicle key is inserted, the vehicle will not power on normally; when the diesel heating switch is turned off, the main controller controls the system to exit the diesel heating mode, at which time the vehicle key can be started normally, and the vehicle enters the normal power distribution process.

[0024] An electronic device, comprising a storage device and a processor:

[0025] Memory: used to store programs;

[0026] A processor is used to call the program stored in the memory,

[0027] A control method for executing a power battery insulation system.

[0028] A car, comprising a power battery insulation system or an electronic device.

[0029] In summary, the present invention includes at least one of the following beneficial technical effects:

[0030] (1) The present invention adopts a diesel heating system to heat the power battery. The system generates heat by burning fuel and transfers the heat to the coolant of the power battery through a heat exchanger to preheat the power battery, thereby reducing the power consumption of traditional vehicles that need to consume their own electricity to heat the battery during operation, thereby improving the power and cruising range of the whole vehicle and improving the economy of the whole vehicle. The diesel heating system has low fuel consumption, high thermal efficiency and fast heating speed.

[0031] (2) The present invention monitors the average temperature of the battery cells through the coordinated work of the main controller, the vehicle controller and the battery management system, and automatically adjusts the working state and heating time of the diesel heating system according to the average temperature of the power battery cells, the vehicle status, the fault status of the diesel heating controller and the ambient temperature, thereby avoiding the problem of the diesel heating controller continuing to work when the battery is already at a suitable temperature, reducing battery power consumption, protecting battery safety, realizing intelligent management of the diesel heating controller, and improving the intelligence level and automation level of the system.

[0032] (3) The present disclosure monitors the battery's temperature, voltage, current and other parameters through a battery management system, automatically adjusts the discharge power of the power battery and the heating power of the diesel heating system, realizes insulation and power battery output isolation control, and ensures that the battery can be maintained within the optimal temperature range during discharge and insulation, thereby improving the battery's performance and life. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a principle block diagram of a power battery insulation system in one embodiment of the present disclosure;

[0034] Figure 2 This is a control flow chart of a wood-fired heating and insulation system in one embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0036] like Figure 1 As shown, a power battery insulation system disclosed in the technical solution includes a main controller, the main controller is used to control the low-voltage power distribution of the whole vehicle, and the main controller is electrically connected to a water pump;

[0037] In the low-voltage environment, the low voltage here is set to 24V, and the main controller is powered by a battery; in the high-voltage environment, the high voltage here is set to 220V, and the main controller is powered by an all-in-one controller (ICU for short); the controller here uses MOSFET chips instead of the traditional fuse + relay solution to realize the digitization and visualization of power distribution information.

[0038] The main controller is used to control the operation of the insulation system, and the main controller is used to switch the diesel heating mode of the insulation system; the main controller is electrically connected to the vehicle controller (VCU for short), and the vehicle controller is used to schedule the operation of the insulation system; it also includes a battery management system (BMS for short), and the battery management system is used to detect the status of the power battery.

[0039] The power supply control of the diesel heating system is completed by the controller, vehicle controller, battery management system and all-in-one controller. The vehicle controller is the brain of the vehicle and is responsible for the overall scheduling of the diesel heating system. The battery management system is responsible for monitoring the battery status and intelligently managing the battery. The main controller is the control and execution unit of the diesel heating system and controls the switching of various diesel heating modes. The main controller collects the vehicle key insertion signal and the diesel heating switch hard line signal.

[0040] Through the coordinated work of the main controller, vehicle controller and battery management system, the average temperature of the battery cells is monitored. According to the average temperature of the power battery cells, the vehicle status, the fault status of the diesel heating controller and the ambient temperature, the working status and heating time of the diesel heating system are automatically adjusted to avoid the problem of the diesel heating controller continuing to work when the battery is already at a suitable temperature, reduce battery power consumption, protect battery safety, realize intelligent management of the diesel heating controller, and improve the intelligence level and automation level of the system.

[0041] This embodiment also discloses a control method for a power battery insulation system, which starts a diesel heating insulation system to keep the battery warm when the vehicle is parked, so that the battery reaches a reasonable temperature range when the vehicle is started. Specifically, it includes:

[0042] (1) Detect whether the vehicle key insertion signal is valid. When the vehicle key insertion signal is valid, the normal power distribution process is executed. Specifically, when the key insertion signal is valid, the vehicle enters the normal power distribution process. When the main controller collects the vehicle key insertion signal and it is valid, the vehicle is powered on normally, and the diesel heating mode is not entered at this time.

[0043] (2) When the vehicle key insertion signal is invalid, determine whether the first diesel heater switch signal is valid. When the first diesel heater switch signal is invalid, the main controller controls the vehicle to power on normally, and the power battery insulation system does not enter the diesel heater insulation mode, and executes according to the normal power distribution process. Same as (1), the vehicle is still powered on normally, and the diesel heater mode is not entered at this time.

[0044] (3) When the first diesel heater switch signal is valid, the diesel heater mode is entered. The main controller supplies power to the vehicle controller, diesel heater controller, battery management system and all-in-one controller, and disconnects all load power supplies of the vehicle, that is, the power supply of the battery temperature management system (BTMS) is disconnected to prevent BTMS from dissipating heat to the battery. In addition, the power battery insulation system continues to operate in the diesel heater mode to heat and insulate the power battery.

[0045] This includes the following process:

[0046] When the main controller supplies power to BMS, VCU, ICU and diesel heating controller, the main controller receives the "electronic water pump switch = 1 (i.e. open)" signal sent by VCU, supplies power to the water pump, and the water pump runs to dissipate heat for the diesel heating controller. When the diesel heating controller receives the "diesel heating controller control = 1 (i.e. normal output)" signal sent by VCU, the diesel heating controller works. In this mode, the main controller constantly receives the "diesel heating working state = 2 (i.e. heating mode)" signal sent by VCU. If the main controller receives the "diesel heating working state ≠ 2", the main controller starts other related strategies. For example: the sleep strategy mentioned above: when the diesel heating working state = 1 (i.e. diesel heating sleep) signal sent by VCU is received, the vehicle controller, diesel heating controller, battery management system and all-in-one controller are disconnected from power, and the sleep indication position is set to 1. The main controller stops sending messages, enters sleep mode, and waits for wake-up.

[0047] In the diesel heating mode, the BMS monitors the battery cell temperature in real time, and the VCU communicates with the diesel heating controller in real time through the CAN bus. When the diesel heating controller fails or the battery cell temperature reaches the set value, the VCU sends the control command "diesel heating controller control = 00 (i.e. stop output)", and after a certain delay, sends the "electronic water pump switch = 00 (i.e. close)" signal to the main controller, and the main controller immediately cuts off the power to the water pump, and the water pump stops running. The system generates heat by burning fuel, and transfers the heat to the coolant of the power battery through the heat exchanger to preheat the power battery, reducing the power consumption of traditional vehicles that need to consume their own power to heat the battery during operation, improving the power and cruising range of the whole vehicle, and improving the economy of the whole vehicle. The diesel heating system has low fuel consumption, high thermal efficiency, and fast heating speed.

[0048] After the main controller receives the "diesel heating working state = 1 (i.e. sleep mode)" signal sent by VCU, it disconnects the power of VCU, BMS, ICU, and diesel heating controller, and sets the sleep indication position to 1. Here, position 1 refers to the sleep preparation state, which realizes the function of indicating the current state of the vehicle to the driver. When the CAN bus receives the sleep response, the whole vehicle enters low power consumption. At this time, controller 1 starts the timer and sets the time. After the timer ends, the main controller is awakened and re-powers VCU, BMS, ICU and diesel heating controller. The system enters the diesel heating mode again. The process is the same as above. The sleep time can be calibrated according to the specific application environment. The figure shows 2 hours. Through the coordinated work of the main controller, BMS and VCU, the average temperature of the battery cell is monitored. According to the average temperature of the power battery cell, the vehicle status, the fault status of the diesel heating controller and the ambient temperature, the working state and heating time of the diesel heating system are automatically adjusted to avoid the problem that the diesel heating controller continues to work when the battery is already at a suitable temperature, reduce the battery power consumption, protect the battery safety, realize the intelligent management of the diesel heating controller, and improve the intelligence level and automation level of the system.

[0049] In diesel heater sleep mode, the main controller is within the sleep timing time. If the vehicle performs the following operations: key insertion, charging, hazard warning light switch and other wake-up sources are valid, the main controller control system exits diesel heater sleep mode and re-enters diesel heater heating mode.

[0050] In addition, it should be noted that the main controller is prohibited from switching the vehicle power level in either the diesel heating or sleep mode. If the key is inserted by mistake, the vehicle will not power on normally. If the vehicle needs to be operated, the diesel heating switch must be turned off, and the main controller control system exits the diesel heating mode. At this time, insert the key again and the vehicle will enter the normal power-on process. Otherwise, the vehicle will enter the normal sleep process.

[0051] Working principle: See Figure 1 and Figure 2 The control strategy for supplying power to the power battery insulation system first detects the vehicle key insertion signal. When the key insertion signal is invalid, it determines whether the first diesel heater switch signal is valid; when the first diesel heater switch signal is valid, the system enters the diesel heater heating mode, and the BMS, VCU, ICU and diesel heater heating controller are powered, and it is determined whether the second diesel heater switch signal is valid; when the second diesel heater switch signal is valid, it determines whether the diesel heater sleep mode signal is valid. When the diesel heater sleep mode signal is invalid, the diesel heater heating mode is maintained. When the diesel heater sleep mode signal is valid, the system enters the diesel heater sleep mode, and the BMS, VCU, ICU and diesel heater heating controller are powered off; if the controller is awakened during the sleep period and the diesel heater switch is valid, it enters the diesel heater heating mode, otherwise it enters the normal power on and off process of the controller; if the controller is not awakened, it determines whether the system sleep time is greater than 2 hours. If the system sleep time is greater than 2 hours, the system enters the diesel heater heating mode again.

[0052] The present invention adopts a diesel heating system to heat the power battery. The system generates heat by burning fuel, and transfers the heat to the coolant of the power battery through a heat exchanger to realize preheating of the power battery, thereby reducing the power consumption of traditional vehicles that need to consume their own power to heat the battery during operation, thereby improving the power and cruising range of the whole vehicle, and improving the economic efficiency of the whole vehicle. The diesel heating system has low fuel consumption, high thermal efficiency and fast heating speed; through the coordinated work of the main controller, BMS and VCU, etc., the average temperature of the battery cell is monitored, and the working state and heating time of the diesel heating system are automatically adjusted according to the average temperature of the power battery cell, the vehicle state, the fault state of the diesel heating controller and the ambient temperature, so as to avoid the problem that the diesel heating controller continues to work when the battery is already at a suitable temperature, reduce the battery power consumption, protect the battery safety, realize the intelligent management of the diesel heating controller, and improve the intelligence level and automation degree of the system; through the BMS monitoring the temperature, voltage, current and other parameters of the battery, the discharge power of the power battery and the heating power of the diesel heating system are automatically adjusted, and the insulation and power battery output isolation control are realized to ensure that the battery can be kept in the optimal temperature range during discharge and insulation, thereby improving the performance and life of the battery.

[0053] Based on the control method of a power battery insulation system described in the above solution, the present technical solution also provides an electronic device, the electronic device includes a storage and a processor:

[0054] Memory: used to store programs. Computer programs are stored on it.

[0055] A processor is used to call the program stored in the memory,

[0056] When the program is executed by the processor, a control method for the power battery insulation system is implemented to realize the insulation function of the power battery, which will not be described in detail here.

[0057] Based on the electronic device described in the above solution, the present technical solution also provides a car, which includes the above electronic device and is used to perform the functions of the above electronic device and realize the heat preservation function of the power battery.

[0058] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A power battery insulation system, characterized in that: It includes a main controller, a battery, an all-in-one controller ICU, a vehicle controller VCU, a battery management system BMS, a diesel heating controller and a water pump. The main controller is used to control the 24V low-voltage power distribution of the vehicle, and the main controller is electrically connected to the water pump; In a low-voltage environment, the main controller is powered by a battery; in a 220V high-voltage environment, the main controller is powered by an all-in-one controller; The main controller is used to control the operation of the insulation system, and the main controller is used to switch the diesel heating mode of the insulation system; The main controller is electrically connected to a vehicle controller, and the vehicle controller is used to schedule the operation of the insulation system; The battery management system is used to detect the status of the power battery; The main controller, vehicle controller, battery management system and all-in-one controller are used together to control the power supply to the insulation system; The control method of the power battery insulation system comprises: detecting whether the vehicle key insertion signal is valid, and when the vehicle key insertion signal is valid, executing according to the normal power distribution process; When the vehicle key insertion signal is invalid, determining whether the first diesel heater switch signal is valid, and when the first diesel heater switch signal is invalid, executing according to the normal power distribution process; When the first diesel heater switch signal is valid, the diesel heater mode is entered, and the main controller supplies power to the vehicle controller, diesel heater controller, battery management system and all-in-one controller, while disconnecting all load power supplies of the vehicle; After entering the diesel heater heating mode, check again whether the diesel heater switch signal is valid. If not, execute the normal power distribution process; if valid, further check whether the diesel heater sleep mode signal is received. If not, re-enter the diesel heater heating mode.

2. A control method for the power battery insulation system according to claim 1, characterized in that: include: Detect whether the vehicle key insertion signal is valid. When the vehicle key insertion signal is valid, execute according to the normal power distribution process; When the vehicle key insertion signal is invalid, determining whether the first diesel heater switch signal is valid, and when the first diesel heater switch signal is invalid, executing according to the normal power distribution process; When the first diesel heater switch signal is valid, the diesel heater mode is entered, and the main controller supplies power to the vehicle controller, diesel heater controller, battery management system and all-in-one controller, while disconnecting all load power supplies of the vehicle; After entering the diesel heater heating mode, check again whether the diesel heater switch signal is valid. If not, execute the normal power distribution process; if valid, further check whether the diesel heater sleep mode signal is received. If not, re-enter the diesel heater heating mode.

3. The control method of the power battery insulation system according to claim 2, characterized in that: When receiving the diesel heater sleep mode signal, the vehicle controller, diesel heater controller, battery management system and all-in-one controller are powered off, and the sleep indication position is set to 1. The main controller stops sending messages, enters sleep mode and waits to be awakened.

4. The control method of the power battery insulation system according to claim 3, characterized in that: Determine whether the main controller is awake. When awake, determine whether the diesel heating switch is valid. If the diesel heating switch is valid, re-enter the diesel heating mode; if the diesel heating switch is invalid, execute according to the normal power distribution process.

5. The control method of the power battery insulation system according to claim 4, characterized in that: Set the sleep waiting time threshold. When the waiting time is longer than the threshold, the system will re-enter the diesel heating mode. Otherwise, the system will continue to sleep and wait.

6. The control method of the power battery insulation system according to claim 5, characterized in that: In sleep mode, the main controller prohibits switching the vehicle power gear, and in this mode, the vehicle will not power on normally when the vehicle key is inserted; turn off the diesel heater switch, and the main controller control system exits the diesel heater mode. At this time, the vehicle key can be started normally and the vehicle enters the normal power distribution process.

7. An electronic device, characterized in that: The electronic device comprises a memory and a processor: Memory: used to store programs; A processor is used to call the program stored in the memory, Used to execute the control method of the power battery insulation system as described in any one of claims 2-6.

8. A car, characterized in that: The automobile comprises the power battery insulation system as claimed in claim 1 or the electronic device as claimed in claim 7.

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