阅读说明：本技术 一种氢能燃料电池汽车动力电池自加热系统及方法 (Self-heating system and method for power battery of hydrogen energy fuel cell automobile ) 是由 谭乐 郝义国 陈华明 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种氢能燃料电池汽车动力电池自加热系统及方法,系统包括：整车控制器VCU、车载T-BOX、电池管理系统BMS、行车电脑ECU1、燃料电池控制器FCU和手机APP；其中,整车控制器VCU、车载T-BOX、电池管理系统BMS、行车电脑ECU1通过CAN总线进行连接通讯；车载T-BOX和手机APP通过无线网络与服务商TSP通信。方法具体为：所述服务商TSP在断电停车期间实时获取当地温度,当车辆所在地理位置环境温度低于设定的阈值A时,所述服务商TSP通过无线网络向手机APP发送提醒用车计划；手机APP反馈是否用车,若在预设时间T1内反馈用车,则动力电池自动进入加热状态；否则,服务商TSP间隔一定时间后再次发送提醒用车计划。本发明的有益效果是：成本低,可节约动力电池加热能耗。(The invention discloses a self-heating system and a method for a power battery of a hydrogen energy fuel cell automobile, wherein the system comprises the following components: the system comprises a vehicle control unit VCU, a vehicle-mounted T-BOX, a battery management system BMS, a driving computer ECU1, a fuel battery controller FCU and a mobile phone APP; the vehicle control unit VCU, the vehicle-mounted T-BOX, the battery management system BMS and the traveling computer ECU1 are connected and communicated through the CAN bus; the vehicle-mounted T-BOX and the mobile phone APP are communicated with the service provider TSP through a wireless network. The method comprises the following specific steps: the service provider TSP acquires local temperature in real time during power-off parking, and when the environmental temperature of the geographic position where the vehicle is located is lower than a set threshold value A, the service provider TSP sends a vehicle reminding plan to the mobile phone APP through a wireless network; the mobile phone APP feeds back whether the vehicle is used or not, and if the vehicle is fed back within the preset time T1, the power battery automatically enters a heating state; otherwise, the service provider TSP sends the reminding vehicle using plan again after a certain time interval. The invention has the beneficial effects that: the cost is low, and the heating energy consumption of the power battery can be saved.)

1. The utility model provides a hydrogen energy fuel cell car power battery self-heating system which characterized in that: the method comprises the following steps: the system comprises a vehicle control unit VCU, a vehicle-mounted T-BOX, a battery management system BMS, a driving computer ECU1, a fuel battery controller FCU and a mobile phone APP;

the vehicle control unit VCU, the vehicle-mounted T-BOX, the battery management system BMS and the traveling computer ECU1 are connected and communicated through the CAN bus;

the vehicle-mounted T-BOX and the mobile phone APP are communicated with the service provider TSP through a wireless network.

2. A self-heating method of a hydrogen energy fuel cell automobile power battery is characterized in that: the service provider TSP acquires local temperature in real time during power-off parking, and when the environmental temperature of the geographic position where the vehicle is located is lower than a set threshold value A, the service provider TSP sends a vehicle reminding plan to the mobile phone APP through a wireless network;

the mobile phone APP feeds back whether the vehicle is used or not, and if the vehicle is fed back within the preset time T1, the power battery automatically enters a heating state; otherwise, the service provider TSP sends the reminding vehicle using plan again after a certain time interval.

3. The self-heating method of the power battery of the hydrogen energy fuel cell automobile as claimed in claim 2, characterized in that:

after the mobile phone APP feeds back the vehicle using time, the vehicle-mounted T-BOX starts timing, and the vehicle controller VCU is awakened at the T1 moment before the vehicle using starts;

the vehicle control unit VCU controls low-voltage electrification, and the battery management system BMS sends the highest temperature value of the battery pack monomer to the vehicle control unit VCU through the CAN bus after power-on self-checking is completed;

the VCU of the vehicle control unit receives the highest temperature value of the battery pack unit sent by the BMS and judges whether the highest temperature value is lower than a threshold value B or not, if so, the VCU of the vehicle control unit sends a high-voltage power-on command, and the VCU starts to charge the low-voltage storage battery after reducing the DC high voltage, so that the low-voltage storage battery is prevented from feeding power during the self-heating period of the battery pack; otherwise, the VCU of the vehicle controller disconnects the low-voltage relay, sends a self-heating completion state message to the vehicle-mounted T-BOX, and enters the dormancy.

4. The self-heating method of the power battery of the hydrogen energy fuel cell automobile according to claim 3, characterized in that: after the vehicle is electrified at high voltage, the running computer ECU1 controls the start of a PTC heating loop inside the battery pack or an external water heating loop for heating the battery pack.

5. The self-heating method of the power battery of the hydrogen energy fuel cell automobile as claimed in claim 4, characterized in that: the ECU1 judges whether the lowest temperature of the monomer in the battery pack is greater than a threshold value C, if so, the PTC heating loop in the battery pack or the external water heating loop is closed; otherwise, heating is continued.

6. The self-heating method of the power battery of the hydrogen energy fuel cell automobile according to claim 5, characterized in that: when the VCU of the vehicle controller receives the message function of the battery pack and is closed or the lowest temperature of a single battery pack is higher than C, whether the SOC of the power battery is less than or equal to E and the residual weight of hydrogen is more than or equal to F is judged, if yes, the VCU of the vehicle controller sends a starting command to the FCU of the fuel battery controller to charge the power battery, the SOC of the power battery is more than or equal to Q in the process of charging the power battery by the fuel battery, the VCU sends a high-voltage power-down command, after the high-voltage power-down is completed, the VCU sends a self-heating completion message to the vehicle-mounted T-BOX, and the low-voltage relay is disconnected in a delayed mode and enters the sleep mode; wherein E < Q; E. q, F are preset values, and are greater than 0 and less than 1;

if not, continuously judging whether the SOC of the power battery is larger than or equal to E and the residual weight of hydrogen is larger than or equal to F, if so, sending a high-voltage power-off instruction by the VCU;

otherwise, if the conditions that the SOC of the power battery is less than or equal to E and the residual hydrogen weight is greater than or equal to F and the conditions that the SOC of the power battery is greater than or equal to E and the residual hydrogen weight is greater than or equal to F are not met, the VCU sends a self-heating termination message to the vehicle-mounted T-BOX and sends a high-voltage low-voltage instruction, and then the low-voltage relay is disconnected to enter the dormancy state.

Technical Field

The invention relates to the field of hydrogen energy automobiles, in particular to a self-heating system and a self-heating method for a power battery of a hydrogen energy fuel cell automobile.

Background

The hydrogen fuel cell automobile can completely realize zero pollution and zero emission, has short energy storage time and long endurance, and is one of the development directions of new energy automobiles in the future. Because the hydrogen fuel cell does not have the energy recovery function, the whole vehicle needs to be provided with a power battery for energy recovery and auxiliary driving of the whole vehicle. However, under a low-temperature environment, the discharge performance of the power battery is poor, the discharge voltage is obviously reduced, and the discharge capacity is obviously reduced. Therefore, it is necessary to heat and keep the temperature of the power battery of the fuel cell automobile.

Disclosure of Invention

In order to solve the above problems, the present invention provides a self-heating system and method for a power battery of a hydrogen energy fuel cell vehicle, wherein the system comprises:

the system comprises a vehicle control unit VCU, a vehicle-mounted T-BOX, a battery management system BMS, a driving computer ECU1, a fuel battery controller FCU and a mobile phone APP;

the vehicle control unit VCU, the vehicle-mounted T-BOX, the battery management system BMS and the traveling computer ECU1 are connected and communicated through the CAN bus;

the vehicle-mounted T-BOX and the mobile phone APP are communicated with the service provider TSP through a wireless network.

A self-heating method of a power battery of a hydrogen energy fuel cell automobile is applied to a self-heating system of the power battery of the hydrogen energy fuel cell automobile, and the method specifically comprises the following steps:

the service provider TSP acquires local temperature in real time during power-off parking, and when the environmental temperature of the geographic position where the vehicle is located is lower than a set threshold value A, the service provider TSP sends a vehicle reminding plan to the mobile phone APP through a wireless network;

the mobile phone APP feeds back whether the vehicle is used or not, and if the vehicle is fed back within the preset time T1, the power battery automatically enters a heating state; otherwise, the service provider TSP sends the reminding vehicle using plan again after a certain time interval.

Further, after the mobile phone APP feeds back the vehicle using time, the vehicle-mounted T-BOX starts to time, and the vehicle controller VCU is awakened at the T1 moment before the vehicle using starts;

the vehicle control unit VCU controls low-voltage electrification, and the battery management system BMS sends the highest temperature value of the battery pack monomer to the vehicle control unit VCU through the CAN bus after power-on self-checking is completed;

the VCU of the vehicle control unit receives the highest temperature value of the battery pack unit sent by the BMS and judges whether the highest temperature value is lower than a threshold value B or not, if so, the VCU of the vehicle control unit sends a high-voltage power-on command, and the VCU starts to charge the low-voltage storage battery after reducing the DC high voltage, so that the low-voltage storage battery is prevented from feeding power during the self-heating period of the battery pack; otherwise, the VCU of the vehicle controller disconnects the low-voltage relay, sends a self-heating completion state message to the vehicle-mounted T-BOX, and enters the dormancy.

Further, after the vehicle is powered on at high voltage, the driving computer ECU1 controls the start of the PTC heating circuit inside the battery pack or the water heating circuit outside the battery pack for heating the battery pack.

Further, the ECU1 determines whether the lowest temperature of the single cells in the battery pack is greater than a threshold value C, and if so, closes the PTC heating circuit inside the battery pack or the water heating circuit outside the battery pack; otherwise, heating is continued.

Further, when the vehicle control unit VCU receives the function shutdown of the battery pack message or the lowest temperature of a battery pack monomer is greater than C, whether the SOC of the power battery is less than or equal to E and the residual weight of hydrogen is greater than or equal to F is judged, if yes, the vehicle control unit VCU sends a starting command to the fuel battery controller FCU to charge the power battery, when the SOC of the power battery is greater than or equal to Q in the process of charging the power battery by the fuel battery, the VCU sends a high-voltage power-down command, after the high-voltage power-down is completed, the VCU sends a self-heating completion message to the vehicle-mounted T-BOX, and the low-voltage relay is disconnected in a delayed mode and enters a sleep mode; wherein E < Q; E. q, F are preset values, and are greater than 0 and less than 1;

if not, continuously judging whether the SOC of the power battery is larger than or equal to E and the residual weight of hydrogen is larger than or equal to F, if so, sending a high-voltage power-off instruction by the VCU;

otherwise, if the conditions that the SOC of the power battery is less than or equal to E and the residual hydrogen weight is greater than or equal to F and the conditions that the SOC of the power battery is greater than or equal to E and the residual hydrogen weight is greater than or equal to F are not met, the VCU sends a self-heating termination message to the vehicle-mounted T-BOX and sends a high-voltage low-voltage instruction, and then the low-voltage relay is disconnected to enter the dormancy state.

The beneficial effects provided by the invention are as follows:

according to the geographical environment temperature of the vehicle and the time for the driver to reserve the vehicle, the vehicle heating system is automatically started to heat the power battery, so that the normal vehicle use of the driver is ensured, and meanwhile, the heating energy consumption of the power battery can be saved;

on the basis of original vehicle hardware, the self-heating function of the power battery can be realized only by software upgrading, and the application cost is low;

through cell-phone APP notice user and reservation good time of using the car, avoid giving power battery heating, extravagant electric energy under the condition of long-time useless car demand.

Drawings

Fig. 1 is a schematic flow chart of a self-heating method for a power battery of a hydrogen energy fuel cell vehicle according to the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

The invention provides a self-heating system and a self-heating method for a power battery of a hydrogen energy fuel cell automobile, wherein the system comprises the following components:

the system comprises a vehicle control unit VCU, a vehicle-mounted T-BOX, a battery management system BMS, a driving computer ECU1, a fuel battery controller FCU and a mobile phone APP;

the vehicle control unit VCU, the vehicle-mounted T-BOX, the battery management system BMS and the traveling computer ECU1 are connected and communicated through the CAN bus;

the vehicle-mounted T-BOX and the mobile phone APP are communicated with the service provider TSP through a wireless network.

Referring to fig. 1, fig. 1 is a schematic flow chart of a self-heating method for a power battery of a hydrogen-energy fuel cell vehicle according to the present invention. A self-heating method of a power battery of a hydrogen energy fuel cell automobile is applied to a self-heating system of the power battery of the hydrogen energy fuel cell automobile, and comprises the following specific steps:

the service provider TSP acquires local temperature in real time during power-off parking, and when the environmental temperature of the geographic position where the vehicle is located is lower than a set threshold value A, the service provider TSP sends a vehicle reminding plan to the mobile phone APP through a wireless network;

the mobile phone APP feeds back whether the vehicle is used or not, and if the vehicle is fed back within the preset time T1, the power battery automatically enters a heating state; otherwise, the service provider TSP sends the reminding vehicle using plan again after a certain time interval.

After the mobile phone APP feeds back the vehicle using time, the vehicle-mounted T-BOX starts timing, and the vehicle controller VCU is awakened at the T1 moment before the vehicle using starts;

the vehicle control unit VCU controls low-voltage electrification, and the battery management system BMS sends the highest temperature value of the battery pack monomer to the vehicle control unit VCU through the CAN bus after power-on self-checking is completed;

the VCU of the vehicle control unit receives the highest temperature value of the battery pack unit sent by the BMS and judges whether the highest temperature value is lower than a threshold value B or not, if so, the VCU of the vehicle control unit sends a high-voltage power-on command, and the VCU starts to charge the low-voltage storage battery after reducing the DC high voltage, so that the low-voltage storage battery is prevented from feeding power during the self-heating period of the battery pack; otherwise, the VCU of the vehicle controller disconnects the low-voltage relay, sends a self-heating completion state message to the vehicle-mounted T-BOX, and enters the dormancy.

After the vehicle is electrified at high voltage, the running computer ECU1 controls the start of a PTC heating loop inside the battery pack or an external water heating loop for heating the battery pack.

The ECU1 judges whether the lowest temperature of the monomer in the battery pack is greater than a threshold value C, if so, the PTC heating loop in the battery pack or the external water heating loop is closed; otherwise, heating is continued.

When the VCU of the vehicle controller receives the message function of the battery pack and is closed or the lowest temperature of a single battery pack is higher than C, whether the SOC of the power battery is less than or equal to E and the residual weight of hydrogen is more than or equal to F is judged, if yes, the VCU of the vehicle controller sends a starting command to the FCU of the fuel battery controller to charge the power battery, the SOC of the power battery is more than or equal to Q in the process of charging the power battery by the fuel battery, the VCU sends a high-voltage power-down command, after the high-voltage power-down is completed, the VCU sends a self-heating completion message to the vehicle-mounted T-BOX, and the low-voltage relay is disconnected in a delayed mode and enters the sleep mode; wherein E < Q; E. q, F are preset values, and are greater than 0 and less than 1;

if not, continuously judging whether the SOC of the power battery is larger than or equal to E and the residual weight of hydrogen is larger than or equal to F, if so, sending a high-voltage power-off instruction by the VCU;

otherwise, if the conditions that the SOC of the power battery is less than or equal to E and the residual hydrogen weight is greater than or equal to F and the conditions that the SOC of the power battery is greater than or equal to E and the residual hydrogen weight is greater than or equal to F are not met, the VCU sends a self-heating termination message to the vehicle-mounted T-BOX and sends a high-voltage low-voltage instruction, and then the low-voltage relay is disconnected to enter the dormancy state.

And the T-BOX restarts the power battery self-heating process after the user uses the vehicle or reaches the time T2.

In the invention, the preset values are set as follows: t1 is XX30min, T2 is XX4 h; e is 30 percent; f is 60 percent; q is 95%; a is-30 ℃; b is-28 ℃; c is 25 ℃.

The invention has the beneficial effects that:

according to the geographical environment temperature of the vehicle and the time for the driver to reserve the vehicle, the vehicle heating system is automatically started to heat the power battery, so that the normal vehicle use of the driver is ensured, and meanwhile, the heating energy consumption of the power battery can be saved;

on the basis of original vehicle hardware, the self-heating function of the power battery can be realized only by software upgrading, and the application cost is low;

through cell-phone APP notice user and reservation good time of using the car, avoid giving power battery heating, extravagant electric energy under the condition of long-time useless car demand.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.