Temperature adjusting method of vehicle storage battery and vehicle

Abstract

The invention provides a temperature adjusting method for a vehicle storage battery and a vehicle, and belongs to the technical field of vehicle electronics. The method comprises the steps that under the condition that the power battery is controlled to supplement electricity to the storage battery due to the fact that the electric quantity of the storage battery is too low, the electricity supplementing power of the storage battery is determined based on current and voltage output by the direct-current converter, and when the electricity supplementing power of the storage battery is low, the temperature sensor can be timely awakened to detect the temperature of a passenger compartment of the vehicle; therefore, when the temperature of the passenger compartment is low, the heat management controller can be requested to heat the passenger compartment by starting the air conditioner so as to indirectly heat the storage battery, so that the charging efficiency of the storage battery under the low-temperature working condition is improved, and the situation that the vehicle cannot be started due to the charging failure of the storage battery when the vehicle is placed under the low-temperature working condition is avoided; and the vehicle use experience of the user is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle electronic technology, and in particular to a temperature regulation method for a vehicle battery and a vehicle. Background Art

[0002] The battery is very important for the starting of new energy vehicles. If the battery is low, it will affect the normal starting of the vehicle, thus causing a bad driving experience for the user. At present, the battery power is checked regularly after the vehicle is powered off, and if the power is too low, the battery is recharged. However, if the vehicle is left in low temperature conditions for a long time after being powered off, the battery recharge efficiency will be low, and then when the battery power is too low, the recharge operation will not be able to recharge the battery, resulting in the vehicle being unable to start normally. Summary of the invention

[0003] The embodiment of the present application provides a vehicle battery temperature adjustment method and a vehicle, which can improve the battery charging efficiency under low temperature conditions, avoid the situation where the vehicle cannot be started due to battery charging failure caused by the vehicle being placed under low temperature conditions, and improve the user's vehicle experience. The technical solution is as follows:

[0004] On the one hand, a method for regulating the temperature of a vehicle battery is provided, which is performed by a vehicle, wherein the vehicle includes a battery, a power battery, a temperature sensor, a body controller, a vehicle controller, a DC converter, and a thermal management controller; the method includes:

[0005] When the vehicle is not started, the body controller obtains the power of the storage battery and the power of the power battery at a first preset time interval; when the power of the storage battery is less than a first threshold and the power of the power battery is greater than a second threshold, a power replenishment request is sent to the vehicle controller;

[0006] The vehicle controller feeds back the current and voltage output by the DC converter to the body controller in response to the supplementary power request;

[0007] The vehicle body controller determines the supplementary power of the battery based on the current and voltage output by the DC converter; and wakes up the temperature sensor when the supplementary power is less than a third threshold;

[0008] The temperature sensor detects the passenger compartment temperature of the vehicle in real time after being awakened, and sends the passenger compartment temperature to the vehicle body controller;

[0009] The vehicle body controller sends a passenger compartment heating request to the thermal management controller when the passenger compartment temperature is less than a fourth threshold;

[0010] In response to the passenger compartment heating request, the thermal management controller controls an air conditioner of the vehicle to turn on and sets an operation mode of the air conditioner to a heating mode to heat the battery by increasing a temperature of the passenger compartment of the vehicle.

[0011] In another aspect, a vehicle is provided, the vehicle comprising a storage battery, a power battery, a temperature sensor, a body controller, a vehicle controller, a DC converter, and a thermal management controller;

[0012] The body controller, the vehicle controller, the DC converter and the thermal management controller are connected via a CAN bus, the temperature sensor and the body controller are connected via a LIN bus, the input end of the DC converter is connected to the power battery, and the output end of the DC converter is connected to the storage battery;

[0013] The body controller is used to obtain the power of the storage battery and the power of the power battery at intervals of a first preset time when the vehicle is not started; and send a power replenishment request to the vehicle controller when the power of the storage battery is less than a first threshold and the power of the power battery is greater than a second threshold;

[0014] The vehicle controller is used to feed back the current and voltage output by the DC converter to the vehicle body controller in response to the supplementary power request;

[0015] The vehicle body controller is used to determine the supplementary power of the battery based on the current and voltage output by the DC converter; and wake up the temperature sensor when the supplementary power is less than a third threshold;

[0016] The temperature sensor is used to detect the passenger compartment temperature of the vehicle in real time after waking up, and send the passenger compartment temperature to the body controller;

[0017] the body controller being configured to send a passenger compartment heating request to the thermal management controller when the passenger compartment temperature is less than a fourth threshold;

[0018] The thermal management controller is used to control the vehicle's air conditioner to turn on in response to the passenger compartment heating request, and set the air conditioner's operating mode to a heating mode, so as to heat the battery by increasing the temperature of the vehicle's passenger compartment.

[0019] In some embodiments, when the vehicle is not started, the body controller is used to start timing, and enter the startup state every first preset time after the timing, so as to achieve self-wake-up;

[0020] In response to entering the startup state, the vehicle body controller obtains the power of the storage battery and the power of the power battery.

[0021] In some embodiments, the vehicle body controller is further configured to send an external circulation start request to the thermal management controller when the passenger compartment temperature is less than the fourth threshold;

[0022] The thermal management controller is further used to control the vehicle to start the external circulation function in response to the external circulation start request, so that the hot air generated by the air conditioner passes through the location where the battery is located.

[0023] In some embodiments, the vehicle body controller is further configured to send a time extension request to the vehicle controller when the temperature of the passenger compartment is less than the fourth threshold;

[0024] The vehicle controller is further configured to control the extension of a preset charging time of the battery in response to the time extension request.

[0025] In some embodiments, when the operating mode of the air conditioner is the heating mode, the thermal management controller is further used to control the operating temperature of the air conditioner to increase.

[0026] In some embodiments, when a preset condition is met, the vehicle body controller is further configured to send a heating end request to the thermal management controller;

[0027] The thermal management controller is further configured to, in response to the heating end request, execute at least one of the following:

[0028] Controlling the air conditioning of the vehicle to shut down;

[0029] Controlling the external circulation function of the vehicle to be turned off;

[0030] resetting the operating temperature of the air conditioner to a default temperature;

[0031] The preset charging time of the battery is reset to the default time.

[0032] In some embodiments, the preset condition includes any one of the following:

[0033] The battery charging time reaches the preset charging time;

[0034] The passenger compartment temperature is greater than the fourth threshold and lasts for a second preset time period;

[0035] The power of the battery reaches the target power;

[0036] The power quantity is less than the second threshold.

[0037] In some embodiments, the vehicle body controller is further configured to send a passenger compartment cooling request to the thermal management controller when the passenger compartment temperature is greater than a fifth threshold;

[0038] The thermal management controller is further used to control the vehicle's air conditioner to turn on in response to the passenger compartment cooling request, and set the air conditioner's operating mode to a cooling mode, so as to cool the battery by lowering the temperature of the vehicle's passenger compartment.

[0039] In some embodiments, the vehicle body controller is further configured to send an external circulation start request to the thermal management controller when the passenger compartment temperature is greater than the fifth threshold;

[0040] The thermal management controller is further used to control the vehicle to start the external circulation function in response to the external circulation start request, so that the cold air generated by the air conditioner passes through the location where the battery is located.

[0041] An embodiment of the present application provides a temperature regulation method for a vehicle battery. When the power battery is controlled to recharge the battery due to low battery power, the recharging power of the battery is determined based on the current and voltage output by the DC converter. When the recharging power of the battery is low, the temperature sensor can be awakened in time to detect the temperature of the vehicle's passenger compartment. When the temperature of the passenger compartment is low, the thermal management controller can be requested to heat the passenger compartment by turning on the air conditioner to indirectly heat the battery, thereby improving the recharging efficiency of the battery under low temperature conditions, avoiding the situation where the vehicle cannot be started due to failure of battery recharging due to the vehicle being placed in low temperature conditions, and improving the user's car experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 is a flow chart of a vehicle battery temperature regulation method provided according to an embodiment of the present application;

[0044] Figure 2 is a flow chart of another vehicle battery temperature regulation method provided according to an embodiment of the present application;

[0045] Figure 3 is a schematic diagram of a temperature regulation process of a vehicle battery provided according to an embodiment of the present application;

[0046] Figure 4 It is a structural schematic diagram of a vehicle provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0047] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0048] In this application, the terms "first", "second", etc. are used to distinguish identical or similar items with basically the same effects and functions. It should be understood that there is no logical or temporal dependency between "first", "second", and "nth", nor is there any limitation on quantity and execution order.

[0049] In the present application, the term "at least one" means one or more, and the term "plurality" means two or more.

[0050] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.) and signals involved in this application are all authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions.

[0051] Figure 1 The flowchart of a method for regulating the temperature of a vehicle battery provided in accordance with an embodiment of the present application is executed by a vehicle, and the vehicle includes a battery, a power battery, a temperature sensor, a body controller, a vehicle controller, a DC converter, and a thermal management controller. Figure 1 As shown, the temperature regulation method of the vehicle battery comprises the following steps:

[0052] 101. When the vehicle is not started, the body controller obtains the battery power and the power battery power at intervals of a first preset time; when the battery power is less than a first threshold and the power battery power is greater than a second threshold, a power replenishment request is sent to the vehicle controller.

[0053] In the embodiment of the present application, the vehicle is not started means that the vehicle is in a stopped state, at which time, the power battery of the vehicle does not charge the battery. In addition, the battery at this time may power the low-voltage electrical system and accessories on the vehicle, but considering that the battery power may gradually decrease when the vehicle is not started, and the battery power is too low, it will cause the battery to be depleted, which will affect the life of the battery. Therefore, when the vehicle is not started, the body controller will obtain the battery power and the power battery power at a certain time interval (i.e., the first preset duration) so that when the battery power is too low and the power battery power is sufficient, the power battery can be controlled in time to charge the battery, ensuring that the battery has enough power to support the subsequent operation of the vehicle. For example, starting the vehicle or powering some low-power on-board electrical appliances. Among them, the first preset duration can be half an hour or 1 hour, and the embodiment of the present application does not limit this.

[0054] When the battery power is less than the first threshold, it indicates that the battery power may be insufficient, which may affect the subsequent startup or other operations of the vehicle. At the same time, if the power battery power is greater than the second threshold, it indicates that the power battery has enough energy to replenish the battery. Accordingly, when the battery power is less than the first threshold and the power battery power is greater than the second threshold, the body controller will send a power replenishment request to the vehicle controller to start the battery replenishment process. The power replenishment request is a signal for requesting the vehicle controller to control related equipment to replenish the battery with insufficient power. The first threshold can be 20% or 30%, and the second threshold can be 10% or 20%.

[0055] 102. In response to the power replenishment request, the vehicle controller feeds back the current and voltage output by the DC converter to the body controller.

[0056] In the embodiment of the present application, the vehicle controller can control the power battery to charge the storage battery in response to the power replenishment request. During the charging process, the DC converter plays an important role. It can convert the high voltage of the power battery into a voltage suitable for charging the storage battery and control the corresponding current to realize the charging of the storage battery.

[0057] In order to let the body controller understand the parameters of the charging process and ensure that the battery can obtain appropriate power replenishment from the power battery, the vehicle controller can also feed back the current and voltage output by the DC converter to the body controller. This information is very important for monitoring and controlling the subsequent charging process, such as ensuring that the voltage and current during the charging process are within a safe and appropriate range to avoid damage to the battery due to problems such as overcharging or overcurrent.

[0058] 103. The body controller determines the battery charging power based on the current and voltage output by the DC converter; when the battery charging power is less than a third threshold, wakes up the temperature sensor.

[0059] In the embodiment of the present application, when the battery charging power is less than the third threshold, it indicates that the battery charging efficiency is low. Since environmental factors may affect the battery charging efficiency, in order to further explore the reasons for the low charging efficiency, the body controller can send a wake-up signal to wake up the vehicle's temperature sensor. The temperature sensor is used to detect the passenger compartment temperature of the vehicle, that is, the internal ambient temperature of the vehicle.

[0060] 104. After being awakened, the temperature sensor detects the passenger compartment temperature of the vehicle in real time and sends the passenger compartment temperature to the body controller.

[0061] In the embodiment of the present application, after the temperature sensor is awakened, it starts to detect the temperature of the vehicle passenger compartment in real time. The passenger compartment refers to the space in the vehicle used to accommodate the driver and passengers, and its temperature can reflect the ambient temperature of the battery. By sending the real-time detected passenger compartment temperature to the body controller, the body controller can make further decisions based on this information.

[0062] 105. When the temperature of the passenger compartment is less than a fourth threshold, the body controller sends a passenger compartment heating request to the thermal management controller.

[0063] In an embodiment of the present application, a low temperature environment will have a negative impact on the performance of the battery (for example, it will cause the internal resistance of the battery to increase and the chemical reaction rate to slow down, thereby affecting the battery's charging efficiency). Therefore, the body controller can send a passenger compartment heating request to the thermal management controller when the passenger compartment temperature is less than a fourth threshold, in the hope of improving the battery charging environment by increasing the temperature of the passenger compartment.

[0064] 106. In response to the passenger compartment heating request, the thermal management controller controls the vehicle's air conditioner to turn on and sets the air conditioner's operating mode to a heating mode, so as to heat the battery by increasing the temperature of the vehicle's passenger compartment.

[0065] In an embodiment of the present application, after receiving a request to heat the passenger compartment, the thermal management controller will control the vehicle's air conditioning system. It will set the air conditioning's operating mode to heating mode, thereby turning on the air conditioning's heating function. After the air conditioning is started, the vehicle's passenger compartment temperature is raised by blowing out hot air. The purpose of raising the passenger compartment temperature is not only to improve the comfort inside the vehicle, but more importantly to heat the battery so that it is in a more suitable temperature environment, thereby improving the battery's performance and improving the charging effect. This allows the battery to be charged in a relatively warm environment, improves charging efficiency, protects the battery from the adverse effects of low temperatures, ensures the normal use of the battery and extends its service life.

[0066] An embodiment of the present application provides a temperature regulation method for a vehicle battery. When the power battery is controlled to recharge the battery due to low battery power, the recharging power of the battery is determined based on the current and voltage output by the DC converter. When the recharging power of the battery is low, the temperature sensor can be awakened in time to detect the temperature of the vehicle's passenger compartment. When the temperature of the passenger compartment is low, the thermal management controller can be requested to heat the passenger compartment by turning on the air conditioner to indirectly heat the battery, thereby improving the recharging efficiency of the battery under low temperature conditions, avoiding the situation where the vehicle cannot be started due to failure of battery recharging due to the vehicle being placed in low temperature conditions, and improving the user's car experience.

[0067] Figure 2 1 is a flow chart of another method for regulating the temperature of a vehicle battery according to an embodiment of the present application. The method is performed by a vehicle, and the vehicle includes a battery, a power battery, a temperature sensor, a body controller, a vehicle controller, a DC converter, and a thermal management controller. Figure 2 As shown, the temperature regulation method of the vehicle battery comprises the following steps:

[0068] 201. When the vehicle is not started, the body controller starts timing, and enters the startup state every first preset time after the timing to achieve self-wake-up.

[0069] In the embodiment of the present application, a timing device is provided in the vehicle body controller, and the timing device can realize the timing function. When the vehicle is not started, the timing device can start timing, and during the timing process, every time the first preset time is counted, a start instruction is sent to the input and output module in the vehicle body controller, so that the vehicle body controller enters the startup state to realize self-wake-up. Among them, the first preset time can be half an hour or one hour, and the embodiment of the present application does not limit this.

[0070] 202. In response to entering the startup state, the body controller obtains the power of the battery and the power of the power battery; when the power of the battery is less than a first threshold and the power of the power battery is greater than a second threshold, a power replenishment request is sent to the vehicle controller.

[0071] In the embodiment of the present application, after being awakened, the body controller can monitor whether the battery needs to be recharged, and perform corresponding recharge operations when recharge is needed. Accordingly, the body controller can obtain the battery power by waking up the battery sensor, and can also obtain the power of the power battery by waking up the battery management system.

[0072] By waking up the body controller at regular intervals, the body controller can continuously monitor the battery power when the vehicle is parked for a long time. This saves battery power and effectively avoids the situation where the vehicle cannot be started due to battery depletion after being parked for a long time.

[0073] 203. In response to the power replenishment request, the vehicle controller feeds back the current and voltage output by the DC converter to the body controller.

[0074] In the embodiment of the present application, step 203 is the same as step 102, which will not be repeated here.

[0075] 204. The body controller determines the battery charging power based on the current and voltage output by the DC converter; when the battery charging power is less than a third threshold, wakes up the temperature sensor.

[0076] In an embodiment of the present application, after receiving the current and voltage output by the DC converter fed back by the vehicle controller, the body controller can calculate the battery's charging power according to an electrical formula. The third threshold is a pre-set power value, which is used to determine whether the battery's charging condition is normal. When the battery's charging power is less than the third threshold, it indicates that the battery's charging efficiency is low, that is, the battery's charging condition may be abnormal due to environmental factors or battery performance problems. Accordingly, in order to further explore the reasons for the abnormal charging condition, the body controller can send a wake-up signal to wake up the vehicle's temperature sensor. Among them, the temperature sensor is usually in a dormant or low-power state in the vehicle to save energy. When it is needed to work, the body controller can activate it through a specific signal (wake-up signal).

[0077] 205. After being awakened, the temperature sensor detects the passenger compartment temperature of the vehicle in real time and sends the passenger compartment temperature to the body controller.

[0078] In the embodiment of the present application, step 205 is the same as step 104 and will not be described again here.

[0079] 206 . When the temperature of the passenger compartment is less than a fourth threshold, the body controller sends a passenger compartment heating request to the thermal management controller.

[0080] In an embodiment of the present application, after the body controller receives the passenger compartment temperature sent by the temperature sensor, it compares it with the fourth threshold value. The fourth threshold value is a set temperature value used to determine whether the passenger compartment temperature is too low. When the passenger compartment temperature is less than the fourth threshold value, it means that the passenger compartment temperature is too low, which means that the ambient temperature of the battery is too low. Since a low temperature environment will have a negative impact on the performance of the battery (for example, it will increase the internal resistance of the battery and slow down the chemical reaction rate, thereby affecting the battery's charging efficiency), the body controller can send a passenger compartment heating request to the thermal management controller when the passenger compartment temperature is less than the fourth threshold value, in the hope of improving the battery charging environment by increasing the temperature of the passenger compartment.

[0081] 207 . In response to the passenger compartment heating request, the thermal management controller controls the vehicle's air conditioner to turn on and sets the air conditioner's operating mode to a heating mode, so as to heat the battery by increasing the temperature of the vehicle's passenger compartment.

[0082] In an embodiment of the present application, after receiving a request to heat the passenger compartment, the thermal management controller will control the vehicle's air conditioning system. Specifically, it first controls the vehicle's air conditioning to turn on, and then sets the air conditioning's operating mode to the heating mode, thereby turning on the air conditioning's heating function. By adjusting the working states of relevant components of the air conditioning system, such as the compressor, heating elements, etc., the air conditioning starts to deliver hot air to the passenger compartment, thereby increasing the temperature of the vehicle's passenger compartment. The purpose of increasing the temperature of the passenger compartment is not only to improve the comfort in the vehicle, but more importantly to heat the battery. Because the vehicle's battery is usually installed near the passenger compartment (front cabin), an increase in the temperature of the passenger compartment can increase the ambient temperature around the battery, thereby increasing the battery's temperature and improving its performance, which helps to improve the battery's charging efficiency and allows the battery to receive charging in a better state.

[0083] In some embodiments, when the working mode of the air conditioner is the heating mode, the thermal management controller can also control the working temperature of the air conditioner to increase. This is mainly to further increase the temperature of the passenger compartment. Since the battery can be heated indirectly by increasing the temperature of the passenger compartment, the temperature of the passenger compartment can be further increased by increasing the working temperature of the air conditioner, so that the battery can be heated quickly, and then the charging efficiency of the battery can be quickly improved, ensuring the battery power.

[0084] 208. When the temperature of the passenger compartment is lower than a fourth threshold, the body controller sends an external circulation start request to the thermal management controller.

[0085] In the embodiment of the present application, when the temperature of the passenger compartment is low, the body controller may also send an external circulation start request to the thermal management controller. The external circulation start request is used to instruct the thermal management controller to adjust the air circulation mode of the vehicle air conditioning system, that is, to instruct the thermal management controller to switch the vehicle's air circulation mode from the internal circulation mode to the external circulation mode.

[0086] 209. In response to the external circulation start request, the thermal management controller controls the vehicle to start the external circulation function so that the hot air generated by the air conditioner passes through the location where the battery is located.

[0087] In the embodiment of the present application, after the thermal management controller receives the external circulation start request sent by the body controller, it can switch the vehicle's air circulation mode from the internal circulation mode to the external circulation mode by controlling the vehicle's air conditioning system and other related components. Among them, in the external circulation mode, the automobile air conditioning system will open the channel connected to the air outside the car, and introduce the fresh air outside the car into the car through the fan. After being processed by the air conditioning system (such as heating, cooling, filtering, etc.), the air is then transported to various air outlets in the car, thereby realizing the exchange of air inside the car with air outside the car. In this process, the air inside the car will be discharged outside the car through a specific channel to maintain the circulation and freshness of the air inside the car.

[0088] When the external circulation function is turned on in the heating mode, the hot air generated by the air conditioner can pass through the location of the battery during the exchange of air inside the car with air outside the car, so that the battery can quickly heat up using the heat generated by the air conditioner. By allowing the hot air to flow through the location of the battery, the temperature around the battery can be quickly increased, so that it is in the appropriate operating temperature range as soon as possible, thereby improving the battery's charging efficiency more quickly.

[0089] In some embodiments, when the temperature of the passenger compartment is less than the fourth threshold, the body controller can also send a duration extension request to the vehicle controller; the vehicle controller controls the extension of the preset charging duration of the battery in response to the duration extension request. The duration extension request is used to instruct the vehicle controller to adjust the battery charging duration to better cope with the situation where the temperature inside the vehicle is too low. By extending the battery charging duration when the temperature in the passenger compartment is low, on the one hand, even if the battery charging efficiency fails to return to normal levels during the heating process, this operation can ensure that the battery obtains sufficient power in a low temperature environment to avoid battery power loss. On the other hand, it can enable the battery to obtain more power to ensure its performance and life, because in a low temperature environment, the battery power consumption may be accelerated and the performance will also decline. Sufficient power helps maintain its normal operation.

[0090] In some embodiments, when a preset condition is met, the vehicle body controller sends a heating end request to the thermal management controller; and the thermal management controller performs at least one of the following in response to the heating end request:

[0091] (1) Control the vehicle's air conditioner to turn off. After receiving a request to end heating, the thermal management controller may perform an operation of turning off the vehicle's air conditioner. This is because when the heating demand ends, the air conditioner will consume additional energy if it continues to run. Turning off the air conditioner can save electricity and reduce unnecessary energy consumption. For example, when the temperature inside the vehicle has reached the normal temperature range and no longer needs to be maintained by air conditioning, turning off the air conditioner can avoid energy waste.

[0092] (2) Control the vehicle's external circulation function to turn off. The external circulation function may be used to introduce outside air to assist in adjusting the temperature or heating the battery during the heating process. When the heating is completed, the external circulation function may no longer be needed. Turning it off can prevent external dust, odors, etc. from entering the vehicle. It also helps to maintain a relatively stable temperature inside the vehicle and reduce energy loss. For example, when a vehicle is driving through a dusty road, if the external circulation is continuously turned on, dust will enter the vehicle. Turning off the external circulation can prevent this from happening.

[0093] (3) Reset the operating temperature of the air conditioner to the default temperature. The operating temperature of the air conditioner is reset to the default temperature to prepare for the next possible temperature adjustment operation. The default temperature is usually a temperature value pre-set by the vehicle manufacturer based on the comfort needs of most users and vehicle performance. In this way, when the air conditioner is needed again, the system can quickly restore to the standard initial settings, improving the convenience and consistency of operation. For example, the default temperature may be set to 25 degrees Celsius. When the air conditioner is turned on again, if the user has no special settings, the air conditioner will be adjusted to 25 degrees Celsius as the target temperature.

[0094] (4) Reset the preset charging time of the battery to the default time. In particular, during the heating process, in order to ensure that the battery can obtain sufficient power in a low temperature environment, the preset charging time of the battery may be extended. When the heating is completed and the vehicle components return to normal working conditions, resetting the preset charging time to the default time can ensure that in the subsequent normal charging process, the battery is charged according to the standard time setting, avoiding damage to the battery due to excessive or short charging time, and ensuring the normal service life and performance of the battery. For example, under normal circumstances, the default charging time is 1 hour, which is extended to 1.5 hours under special heating requirements, and returns to the default time of 1 hour after the heating is completed.

[0095] After completing the heating task, through the information interaction between the body controller and the thermal management controller, the vehicle's air-conditioning system, external circulation function, battery charging time and other related parameters are adjusted to restore to normal working state, realize the rational use of energy and the stable operation of the vehicle system.

[0096] In some embodiments, the preset condition includes any of the following:

[0097] (1) The battery charging time reaches the preset charging time. The vehicle system sets a specific charging time standard for the battery, namely the preset charging time. When the actual battery charging time reaches this preset time, it means that the vehicle can believe that the battery has completed enough charging process within this charging time, and may have reached the power state that can meet the current and subsequent operation needs of the vehicle, or has reached the upper limit of the safe charging time of the battery. Therefore, the body controller can end the battery charging process. When the battery charging is completed, in order to reduce unnecessary energy consumption

[0098] The body controller can send a heating end request to the thermal management controller after the battery charging time reaches a preset charging time.

[0099] (2) The passenger compartment temperature is greater than the fourth threshold and lasts for a second preset time. When the passenger compartment temperature rises to a value greater than the fourth threshold and this high temperature state lasts for a second preset time, this indicates that the temperature inside the vehicle has been maintained at a high level for a certain period of time, which may mean that the vehicle is warm enough and no additional heating operation is required, or that such a high temperature state may have an impact on other components or systems of the vehicle, so the body controller can send a heating end request to the thermal management controller when this condition is met.

[0100] (3) The battery reaches the target power. The target power refers to the maximum limit of the battery power allowed under the premise of ensuring that the battery can work normally, is not damaged, and ensures the safe operation of vehicles and other equipment. This value is determined based on a combination of factors such as the vehicle's operating requirements and the performance of the battery. When the battery reaches this target power through the charging process, it means that the battery has been charged with enough power to meet the various power needs of the vehicle at present and in the following period of time. At this time, the body controller can end the battery charging process. When the battery charging is completed, in order to reduce unnecessary energy consumption, the body controller can send a heating end request to the thermal management controller after the battery reaches the target power.

[0101] (4) The power battery level is less than the second threshold. When the power battery level drops below the second threshold, it indicates that the power battery level is already at a low level. In order to ensure that the subsequent vehicle can continue to operate safely and stably, the body controller can limit the use of certain high-energy consumption functions, that is, it can send a heating end request to the thermal management controller to avoid vehicle failure or inability to drive due to low power level.

[0102] Combine the following Figure 3 The schematic diagram of the temperature regulation process of the vehicle battery shown in FIG. 1 is used to describe the temperature regulation scheme of the vehicle battery provided in the embodiment of the present application as a whole. Figure 3 As shown, after the vehicle is powered off, the body controller (ZCU, Zone Control Unit) can be awakened at a fixed time, and after waking up, it obtains the battery power and the power battery power, and determines whether condition 1 is met: the power battery power is higher than the second threshold and the battery power is lower than the first threshold. When condition 1 is met, the body controller sends a charging request to the vehicle controller (VCCM, Vehicle Central Control Module), and at the same time, the temperature sensor detects the passenger compartment temperature of the vehicle and sends the passenger compartment temperature to the body controller. After the charging function is turned on, the vehicle controller can feedback the current and voltage output by the DC converter (DCDC) to the body controller. After receiving it, the body controller calculates the battery charging power. After the calculation is completed, it determines whether condition 2 is met: the battery charging efficiency is less than the third threshold and the passenger compartment temperature is less than the fourth threshold. When condition 2 is met, the body controller sends a passenger compartment heating request to the thermal management controller (ECC, Electronic Climate Control) in the vehicle controller. The thermal management controller controls the passenger compartment to turn on the heating function and the external circulation function at the same time to increase the temperature of the front compartment battery. At the same time, the vehicle control can also control the preset charging time of the battery to extend to ensure the battery power. After turning it on, it is determined whether condition 3 is met: the charging function is turned off (the battery charging time reaches the preset charging time); or, the passenger compartment temperature is greater than the fourth threshold and lasts for a certain period of time; or, the battery power reaches the target power; or, the power of the power battery is lower than the second threshold. When condition 3 is met, the body controller immediately sends a heating end request to the thermal management controller. After receiving it, the thermal management controller controls the air conditioner to turn off, controls the external circulation function to turn off, and resets the working temperature of the air conditioner and the preset charging time of the battery to the state before the start.

[0103] In some embodiments, the vehicle body controller can also reduce the temperature around the battery in a high temperature environment. Accordingly, when the passenger compartment temperature is greater than a fifth threshold, the vehicle body controller sends a passenger compartment cooling request to the thermal management controller; in response to the passenger compartment cooling request, the thermal management controller controls the vehicle's air conditioner to turn on, and sets the air conditioner's operating mode to a cooling mode, so as to cool the battery by reducing the vehicle's passenger compartment temperature.

[0104] Among them, after the body controller receives the passenger compartment temperature sent by the temperature sensor, it will compare it with the fifth threshold. The fifth threshold is a set temperature value used to determine whether the passenger compartment temperature is too high. When the passenger compartment temperature is less than the fifth threshold, it means that the passenger compartment temperature is too high, that is, it means that the ambient temperature of the battery is too high. Since the high temperature environment will have a negative impact on the performance of the battery, the body controller can send a passenger compartment cooling request to the thermal management controller when the passenger compartment temperature is greater than the fifth threshold, in the hope of improving the battery charging environment by lowering the temperature of the passenger compartment. After receiving the passenger compartment cooling request, the thermal management controller will control the vehicle's air conditioning system. Specifically, it first controls the vehicle's air conditioning to turn on, and then sets the working mode of the air conditioning to the cooling mode, thereby turning on the cooling function of the air conditioning. By adjusting the working status of relevant components of the air conditioning system, such as the compressor, cooling element, etc., the air conditioning starts to deliver cold air to the passenger compartment, thereby reducing the temperature of the vehicle's passenger compartment. The purpose of lowering the temperature of the passenger compartment is not only to improve the comfort inside the vehicle, but more importantly to cool the battery. Because the vehicle's battery is usually installed near the passenger compartment (front cabin), the reduction in the passenger compartment temperature can reduce the ambient temperature around the battery, thereby reducing the battery's temperature and improving its performance, which helps to improve the battery's charging efficiency and allows the battery to receive charging in a better condition.

[0105] In some embodiments, when the temperature of the passenger compartment is greater than a fifth threshold, the body controller sends an external circulation start request to the thermal management controller; the thermal management controller responds to the external circulation start request and controls the vehicle to start the external circulation function so that the cold air generated by the air conditioner passes through the location of the battery.

[0106] Among them, when the temperature of the passenger compartment is high, the body controller can also send an external circulation start request to the thermal management controller. After receiving the external circulation start request sent by the body controller, the thermal management controller can switch the vehicle's air circulation mode from internal circulation mode to external circulation mode by controlling the vehicle's air conditioning system and other related components. Turning on the external circulation function in cooling mode can allow the cold air generated by the air conditioner to pass through the location of the battery during the exchange of air inside the car and air outside the car, so that the battery can use the cold air generated by the air conditioner to quickly cool down. By allowing cold air to flow through the location of the battery, the temperature around the battery can be quickly reduced so that it is in a suitable operating temperature range as soon as possible, thereby improving the battery's charging efficiency more quickly.

[0107] An embodiment of the present application provides a temperature regulation method for a vehicle battery. When the power battery is controlled to recharge the battery due to low battery power, the recharging power of the battery is determined based on the current and voltage output by the DC converter. When the recharging power of the battery is low, the temperature sensor can be awakened in time to detect the temperature of the vehicle's passenger compartment. When the temperature of the passenger compartment is low, the thermal management controller can be requested to heat the passenger compartment by turning on the air conditioner to indirectly heat the battery, thereby improving the recharging efficiency of the battery under low temperature conditions, avoiding the situation where the vehicle cannot be started due to failure of battery recharging due to the vehicle being placed in low temperature conditions, and improving the user's car experience.

[0108] Figure 4 is a schematic diagram of the structure of a vehicle provided according to an embodiment of the present application. Figure 4 As shown, the vehicle includes a storage battery 401, a power battery 402, a temperature sensor 403, a body controller 404, a vehicle controller 405, a DC converter 406 and a thermal management controller 407;

[0109] The body controller 404, the vehicle controller 405, the DC converter 406 and the thermal management controller 407 are connected via a CAN (Controller Area Network) bus, the temperature sensor 403 and the body controller 404 are connected via a LIN (Local Interconnect Network) bus, the input end of the DC converter 406 is connected to the power battery 402, and the output end of the DC converter 406 is connected to the battery 401;

[0110] In some embodiments, the vehicle also includes a battery sensor 408 and a battery management system 409. The battery sensor 408 and the body controller 404 are connected via a LIN bus, the power battery 402 and the battery management system 409 are connected via a hard wire, and the battery management system 409, the body controller 404 and the vehicle controller 405 are connected via a CAN bus.

[0111] The battery sensor 408 is used to detect the power level of the battery 401 in real time after waking up, and send the power level of the battery 401 to the body controller 404;

[0112] The battery management system 409 is used to detect the power level of the power battery 402 in real time after waking up, and send the power level of the power battery 402 to the body controller 404 .

[0113] The body controller 404 is used to obtain the power of the storage battery 401 and the power of the power battery 402 at a first preset time interval when the vehicle is not started; when the power of the storage battery 401 is less than a first threshold and the power of the power battery 402 is greater than a second threshold, send a power replenishment request to the vehicle controller 405;

[0114] The vehicle controller 405 is used to respond to the power replenishment request and feed back the current and voltage output by the DC converter 406 to the body controller 404;

[0115] The body controller 404 is used to determine the supplementary power of the battery 401 based on the current and voltage output by the DC converter 406; when the supplementary power is less than a third threshold, wake up the temperature sensor 403;

[0116] The temperature sensor 403 is used to detect the passenger compartment temperature of the vehicle in real time after waking up, and send the passenger compartment temperature to the body controller 404;

[0117] The body controller 404 is configured to send a passenger compartment heating request to the thermal management controller 407 when the passenger compartment temperature is less than a fourth threshold;

[0118] The thermal management controller 407 is used to control the vehicle's air conditioner to start in response to a passenger compartment heating request, and set the air conditioner's operating mode to a heating mode to heat the battery 401 by increasing the vehicle's passenger compartment temperature.

[0119] In some embodiments, when the vehicle is not started, the body controller 404 is used to start timing, and enter the startup state every first preset time after the timing, so as to achieve self-wake-up;

[0120] In response to entering the startup state, the vehicle body controller 404 obtains the power of the storage battery 401 and the power of the power battery 402 .

[0121] In some embodiments, the body controller 404 is further configured to send an external circulation start request to the thermal management controller 407 when the passenger compartment temperature is less than a fourth threshold;

[0122] The thermal management controller 407 is also used to control the vehicle to start the external circulation function in response to the external circulation start request, so that the hot air generated by the air conditioner passes through the location where the battery 401 is located.

[0123] In some embodiments, the body controller 404 is further configured to send a time extension request to the vehicle controller 405 when the temperature of the passenger compartment is less than a fourth threshold value;

[0124] The vehicle controller 405 is also used to control the extension of the preset charging time of the battery 401 in response to a time extension request.

[0125] In some embodiments, when the working mode of the air conditioner is the heating mode, the thermal management controller 407 is also used to control the working temperature of the air conditioner to increase.

[0126] In some embodiments, when a preset condition is met, the body controller 404 is further configured to send a heating end request to the thermal management controller 407;

[0127] The thermal management controller 407 is further configured to execute at least one of the following in response to the heating end request:

[0128] Control the vehicle's air conditioning to shut down;

[0129] Control the vehicle's external circulation function to shut down;

[0130] Reset the air conditioner's operating temperature to the default temperature;

[0131] The preset charging time of the battery 401 is reset to the default time.

[0132] In some embodiments, the preset condition includes any of the following:

[0133] The charging time of the storage battery 401 reaches the preset charging time;

[0134] The temperature of the passenger compartment is greater than a fourth threshold value and the duration thereof reaches a second preset duration;

[0135] The power level of the storage battery 401 reaches the target power level;

[0136] The power level is less than a second threshold.

[0137] In some embodiments, the body controller 404 is further configured to send a passenger compartment cooling request to the thermal management controller 407 when the passenger compartment temperature is greater than a fifth threshold;

[0138] The thermal management controller 407 is also used to control the vehicle's air conditioner to start in response to a passenger compartment cooling request, and set the air conditioner's operating mode to a cooling mode, so as to cool the battery 401 by lowering the temperature of the vehicle's passenger compartment.

[0139] In some embodiments, the body controller 404 is further configured to send an external circulation start request to the thermal management controller 407 when the passenger compartment temperature is greater than a fifth threshold;

[0140] The thermal management controller 407 is also used to control the vehicle to start the external circulation function in response to the external circulation start request, so that the cold air generated by the air conditioner passes through the location where the battery 401 is located.

[0141] An embodiment of the present application provides a vehicle, in the case where a power battery is controlled to recharge the battery due to low battery power, the recharging power of the battery is determined based on the current and voltage output by a DC converter, and when the recharging power of the battery is low, a temperature sensor can be awakened in time to detect the temperature of the passenger compartment of the vehicle, and then when the temperature of the passenger compartment is low, a thermal management controller can be requested to heat the passenger compartment by turning on the air conditioner to indirectly heat the battery, thereby improving the recharging efficiency of the battery under low temperature conditions, avoiding the situation where the vehicle cannot be started due to failure of battery recharging due to the vehicle being placed in low temperature conditions, and improving the user's vehicle experience.

[0142] It should be noted that the vehicle and vehicle battery detection method embodiments provided in the above embodiments belong to the same concept, and the specific implementation process is detailed in the method embodiment, which will not be repeated here.

[0143] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A method for regulating the temperature of a vehicle battery, characterized in that: The method is performed by a vehicle, wherein the vehicle includes a storage battery, a power battery, a temperature sensor, a body controller, a vehicle controller, a DC converter, and a thermal management controller; the method includes: When the vehicle is not started, the body controller obtains the power of the storage battery and the power of the power battery at a first preset time interval; when the power of the storage battery is less than a first threshold and the power of the power battery is greater than a second threshold, a power replenishment request is sent to the vehicle controller; The vehicle controller feeds back the current and voltage output by the DC converter to the body controller in response to the supplementary power request; The vehicle body controller determines the supplementary power of the battery based on the current and voltage output by the DC converter; and wakes up the temperature sensor when the supplementary power is less than a third threshold; The temperature sensor detects the passenger compartment temperature of the vehicle in real time after being awakened, and sends the passenger compartment temperature to the vehicle body controller; The vehicle body controller sends a passenger compartment heating request to the thermal management controller when the passenger compartment temperature is less than a fourth threshold; In response to the passenger compartment heating request, the thermal management controller controls an air conditioner of the vehicle to turn on and sets an operation mode of the air conditioner to a heating mode to heat the battery by increasing a temperature of the passenger compartment of the vehicle.

2. The method according to claim 1, characterized in that When the vehicle is not started, the vehicle body controller obtains the power of the storage battery and the power of the power battery at intervals of a first preset time, including: When the vehicle is not started, the body controller starts timing, and enters the startup state every first preset time after timing, so as to achieve self-wake-up; In response to entering the startup state, the vehicle body controller obtains the power of the storage battery and the power of the power battery.

3. The method according to claim 1, characterized in that The method further comprises: The body controller sends an external circulation start request to the thermal management controller when the passenger compartment temperature is lower than the fourth threshold; In response to the external circulation start request, the thermal management controller controls the vehicle to start an external circulation function so that hot air generated by the air conditioner passes through a location where the battery is located.

4. The method according to claim 1, characterized in that The method further comprises: The body controller sends a time extension request to the vehicle controller when the temperature of the passenger compartment is less than the fourth threshold; The vehicle controller controls the preset charging time of the battery to be extended in response to the time extension request.

5. The method according to claim 1, characterized in that The method further comprises: When the operating mode of the air conditioner is the heating mode, the thermal management controller controls the operating temperature of the air conditioner to increase.

6. The method according to any one of claims 1 to 5, characterized in that: The method further comprises: When a preset condition is met, the vehicle body controller sends a heating end request to the thermal management controller; In response to the heating end request, the thermal management controller performs at least one of the following: Controlling the air conditioning of the vehicle to shut down; Controlling the external circulation function of the vehicle to be turned off; resetting the operating temperature of the air conditioner to a default temperature; The preset charging time of the battery is reset to the default time.

7. The method according to claim 6, characterized in that The preset condition includes any of the following: The battery charging time reaches the preset charging time; The passenger compartment temperature is greater than the fourth threshold and lasts for a second preset time period; The power of the battery reaches the target power; The power quantity is less than the second threshold.

8. The method according to claim 1, characterized in that: The method further comprises: The vehicle body controller sends a passenger compartment cooling request to the thermal management controller when the passenger compartment temperature is greater than a fifth threshold; In response to the passenger compartment cooling request, the thermal management controller controls the air conditioner of the vehicle to turn on and sets the operating mode of the air conditioner to a cooling mode, so as to cool the battery by lowering the temperature of the passenger compartment of the vehicle.

9. The method according to claim 8, characterized in that The method further comprises: The body controller sends an external circulation start request to the thermal management controller when the passenger compartment temperature is greater than the fifth threshold; In response to the external circulation start request, the thermal management controller controls the vehicle to start an external circulation function so that the cold air generated by the air conditioner passes through the location where the battery is located.

10. A vehicle, characterized in that: The vehicle includes a storage battery, a power battery, a temperature sensor, a body controller, a vehicle controller, a DC converter and a thermal management controller; The body controller, the vehicle controller, the DC converter and the thermal management controller are connected via a CAN bus, the temperature sensor and the body controller are connected via a LIN bus, the input end of the DC converter is connected to the power battery, and the output end of the DC converter is connected to the storage battery; The body controller is used to obtain the power of the storage battery and the power of the power battery at intervals of a first preset time when the vehicle is not started; and send a power replenishment request to the vehicle controller when the power of the storage battery is less than a first threshold and the power of the power battery is greater than a second threshold; The vehicle controller is used to feed back the current and voltage output by the DC converter to the vehicle body controller in response to the supplementary power request; The vehicle body controller is used to determine the supplementary power of the battery based on the current and voltage output by the DC converter; and wake up the temperature sensor when the supplementary power is less than a third threshold; The temperature sensor is used to detect the passenger compartment temperature of the vehicle in real time after waking up, and send the passenger compartment temperature to the body controller; the body controller being configured to send a passenger compartment heating request to the thermal management controller when the passenger compartment temperature is less than a fourth threshold; The thermal management controller is used to control the vehicle's air conditioner to turn on in response to the passenger compartment heating request, and set the air conditioner's operating mode to a heating mode, so as to heat the battery by increasing the temperature of the vehicle's passenger compartment.

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