Vehicle battery charging method and device in high-temperature environment, electronic equipment and storage medium

Abstract

The application provides a high-temperature environment vehicle battery charging method and device, electronic equipment and storage medium. The module temperature of a target battery is obtained, the charging mode and required request current in the corresponding temperature environment are determined according to the module temperature, the output of the charging pile can cover the fast charging demand of the target battery and the low-voltage load consumption of the whole vehicle, and the safety condition and charge condition of the battery under each temperature working condition are met, so that the efficiency and practicability of current regulation are improved, and in addition, the safety and service life of the battery application are improved.

Description

Technical Field

[0001] This application relates to battery technology, and more particularly to a method, apparatus, electronic device, and storage medium for charging vehicle batteries in high-temperature environments. Background Technology

[0002] In high-temperature environments, when new energy vehicles are charging at charging stations, due to the electrochemical characteristics and safety of lithium-ion batteries, the battery management system requests a lower charging current. When the air conditioning in the vehicle is cooled and low-voltage electrical appliances are turned on, the charging current of the battery may decrease or the battery's State of Charge (SOC) may decrease instead of increase during the charging process, which may not meet the fast charging requirements of the vehicle.

[0003] Existing methods for regulating charging current in high-temperature environments monitor the current SOC and temperature of the power battery to reduce thermal management energy consumption. However, they fail to address the issue that when the charging pile's output current is less than the current required by the vehicle's electrical devices during charging, the battery's charged energy decreases instead of increasing, failing to meet fast charging demands. This results in low current regulation efficiency and poor practicality for such methods. Therefore, a new method for charging vehicle batteries in high-temperature environments is needed to improve the efficiency and practicality of current regulation. Summary of the Invention

[0004] This application provides a method, apparatus, electronic device, and storage medium for charging vehicle batteries in high-temperature environments, in order to solve the problems of low efficiency and practicality of current regulation in high-temperature environments.

[0005] In a first aspect, this application provides a method for charging a vehicle battery in a high-temperature environment, comprising:

[0006] Obtain the module temperature of the target battery;

[0007] The charging mode is determined based on the module temperature and a preset threshold.

[0008] Based on the charging mode, the requested current is determined, and based on the requested current, a corresponding current is obtained from the charging pile to charge the target battery.

[0009] The requested current is used to indicate the current required to fast charge the target battery.

[0010] As an optional implementation, the preset threshold includes a first threshold and a second threshold, wherein the first threshold is higher than the second threshold;

[0011] And, determining the charging mode based on the module temperature and a preset threshold includes:

[0012] If the module temperature is higher than the first threshold, the charging mode is set to pure cooling mode, the vehicle battery cooling device is controlled to work, and the cooling process is started until the module temperature drops to the first threshold or the charging pile stops working.

[0013] If the module temperature is not higher than the first threshold but higher than the second threshold, the charging mode is determined to be a cooling-while-charging mode, the vehicle battery cooling device is controlled to be in working state, and the cooling process is started until the module temperature drops to the second threshold or the charging pile stops working.

[0014] If the module temperature is not higher than the second threshold, the charging mode is determined to be pure charging mode, and the vehicle battery cooling device is controlled to be in a deactivated state.

[0015] As an optional implementation, the charging mode is a pure cooling mode or a simultaneous cooling and charging mode, and the method further includes:

[0016] Obtain the cooling operating parameters of the target battery;

[0017] The cooling operating parameters include cooling time, cell temperature change, and battery charge energy.

[0018] If the charging mode is a pure cooling mode, then based on the cooling operating parameters and the corresponding first fault condition, it is determined whether a first cooling fault occurs during the cooling process. If a cooling fault is determined to occur during the cooling process, then the cooling process is stopped.

[0019] The first fault condition includes: if the cooling time exceeds the time threshold and the cell temperature change is lower than the change threshold, or the battery charge energy is lower than the charge threshold, then it is determined that a first cooling fault has occurred during the cooling process.

[0020] If the charging mode is a simultaneous cooling and charging mode, then based on the cooling operating parameters and the corresponding second fault condition, it is determined whether a second cooling fault occurs during the cooling process. If a cooling fault is determined to occur during the cooling process, then the cooling process is stopped.

[0021] The second fault condition includes: if the module temperature is less than the fault threshold and the number of times the thermal management signal is restarted exceeds a preset value, then a second cooling fault is determined to have occurred during the cooling process.

[0022] As an optional implementation, determining the requested current based on the charging mode includes:

[0023] If the charging mode is a simultaneous cooling and charging mode, then the first charging current is determined according to the module temperature, and the first load current of the vehicle battery cooling device and the second load current of the vehicle low-voltage electrical device are obtained. The requested current is determined according to the first charging current, the first load current and the second load current.

[0024] If the charging mode is a pure charging mode, then the second charging current and the third load current of the vehicle's low-voltage electrical device are determined, and the requested current is determined based on the second charging current and the third load current.

[0025] As an optional implementation, the charging mode is either a cooling-while-charging mode or a pure charging mode;

[0026] Before obtaining a current of the corresponding magnitude from the charging pile to charge the target battery according to the requested current, the method further includes:

[0027] Perform charging preprocessing operations;

[0028] Close the negative contactor, and after a first delay, close the pre-charge contactor to perform a pre-charge operation for a preset pre-charge duration on the target battery. Then close the positive contactor and after a second delay, disconnect the pre-charge relay.

[0029] The system sends a pre-charging completion message and the requested current to the charging pile via the bus, and then closes the fast charging contactor.

[0030] As an optional implementation, determining the charging mode based on the module temperature and a preset threshold includes:

[0031] The thermal management process is determined based on the module temperature, the preset threshold, and the ambient temperature at which the battery operates.

[0032] The charging mode is determined based on the aforementioned thermal management process;

[0033] The thermal management process is used to determine the charging mode based on the module temperature and control the charging process, and to control the target battery to end charging when the corresponding data meets the preset temperature control loop fault condition or charging prohibition fault condition.

[0034] The temperature control circuit includes either a heating circuit or a cooling circuit.

[0035] Secondly, this application provides a vehicle battery charging device for high-temperature environments, the device comprising:

[0036] The acquisition module is used to acquire the module temperature of the target battery.

[0037] The processing module is used to determine the charging mode based on the module temperature and a preset threshold.

[0038] The processing module is further configured to determine the requested current according to the charging mode, and obtain a corresponding current from the charging pile to charge the target battery according to the requested current.

[0039] The requested current is used to indicate the current required to fast charge the target battery.

[0040] As an optional implementation, the preset threshold includes a first threshold and a second threshold, wherein the first threshold is higher than the second threshold;

[0041] Furthermore, the specific method by which the processing module determines the charging mode based on the module temperature and a preset threshold includes:

[0042] If the module temperature is higher than the first threshold, the charging mode is set to pure cooling mode, the vehicle battery cooling device is controlled to work, and the cooling process is started until the module temperature drops to the first threshold or the charging pile stops working.

[0043] If the module temperature is not higher than the first threshold but higher than the second threshold, the charging mode is determined to be a cooling-while-charging mode, the vehicle battery cooling device is controlled to be in working state, and the cooling process is started until the module temperature drops to the second threshold or the charging pile stops working.

[0044] If the module temperature is not higher than the second threshold, the charging mode is determined to be pure charging mode, and the vehicle battery cooling device is controlled to be in a deactivated state.

[0045] As an optional implementation, the charging mode is either a pure cooling mode or a mode that charges while cooling.

[0046] The acquisition module is also used to acquire the cooling operating parameters of the target battery;

[0047] The cooling operating parameters include cooling time, cell temperature change, and battery charge energy.

[0048] The processing module is further configured to, if the charging mode is a pure cooling mode, determine whether a first cooling fault occurs during the cooling process based on the cooling operating parameters and the corresponding first fault condition, and if a cooling fault is determined to occur during the cooling process, stop the cooling process.

[0049] The first fault condition includes: if the cooling time exceeds the time threshold and the cell temperature change is lower than the change threshold, or the battery charge energy is lower than the charge threshold, then it is determined that a first cooling fault has occurred during the cooling process.

[0050] The processing module is further configured to, if the charging mode is a cooling-while-charging mode, determine whether a second cooling fault occurs during the cooling process based on the cooling operating parameters and the corresponding second fault condition; if a cooling fault is determined to occur during the cooling process, then stop the cooling process.

[0051] The second fault condition includes: if the module temperature is less than the fault threshold and the number of times the thermal management signal is restarted exceeds a preset value, then a second cooling fault is determined to have occurred during the cooling process.

[0052] As an optional implementation, the processing module determines the specific method of requesting current based on the charging mode, including:

[0053] If the charging mode is a simultaneous cooling and charging mode, then the first charging current is determined according to the module temperature, and the first load current of the vehicle battery cooling device and the second load current of the vehicle low-voltage electrical device are obtained. The requested current is determined according to the first charging current, the first load current and the second load current.

[0054] If the charging mode is a pure charging mode, then the second charging current and the third load current of the vehicle's low-voltage electrical device are determined, and the requested current is determined based on the second charging current and the third load current.

[0055] As an optional implementation, the charging mode is either a cooling-while-charging mode or a pure charging mode;

[0056] The processing module is further configured to charge the target battery before obtaining a corresponding current from the charging pile based on the requested current.

[0057] Perform charging preprocessing operations;

[0058] Close the negative contactor, and after a first delay, close the pre-charge contactor to perform a pre-charge operation for a preset pre-charge duration on the target battery. Then close the positive contactor and after a second delay, disconnect the pre-charge relay.

[0059] The system sends a pre-charging completion message and the requested current to the charging pile via the bus, and then closes the fast charging contactor.

[0060] As an optional implementation, the processing module determines the specific charging mode based on the module temperature and a preset threshold, including:

[0061] The thermal management process is determined based on the module temperature, the preset threshold, and the ambient temperature at which the battery operates.

[0062] The charging mode is determined based on the aforementioned thermal management process;

[0063] The thermal management process is used to determine the charging mode based on the module temperature and control the charging process, and to control the target battery to end charging when the corresponding data meets the preset temperature control loop fault condition or charging prohibition fault condition.

[0064] The temperature control circuit includes either a heating circuit or a cooling circuit.

[0065] Thirdly, this application also provides an electronic device, comprising:

[0066] At least one processor; and

[0067] A memory communicatively connected to the at least one processor; wherein,

[0068] The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method as described in the first aspect.

[0069] Fourthly, this application also provides a computer-readable storage medium storing computer-executable instructions, which, when executed by a processor, are used to implement the method described in the first aspect.

[0070] The high-temperature environment vehicle battery charging method, device, electronic equipment, and storage medium provided in this application obtain the module temperature of the target battery, determine the charging mode and required current under the corresponding temperature environment based on the module temperature, so that the output of the charging pile can cover the fast charging needs of the target battery and the low-voltage load consumption of the whole vehicle, and meet the safety and charging conditions of the battery under various temperature conditions, thereby improving the efficiency and practicality of current regulation, and also improving the safety and service life of battery applications. Attached Figure Description

[0071] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0072] Figure 1 This is a schematic diagram illustrating an application scenario of a vehicle battery charging method in a high-temperature environment disclosed in an embodiment of the present invention.

[0073] Figure 2 This is a schematic flowchart of a method for charging a vehicle battery in a high-temperature environment, as disclosed in an embodiment of the present invention.

[0074] Figure 3This is a schematic flowchart of another method for charging vehicle batteries in a high-temperature environment disclosed in an embodiment of the present invention.

[0075] Figure 4 This is a schematic flowchart of another method for charging vehicle batteries in a high-temperature environment, as disclosed in an embodiment of the present invention.

[0076] Figure 5 This is a schematic diagram of the structure of a vehicle battery charging device for high-temperature environments disclosed in an embodiment of the present invention;

[0077] Figure 6 This is a schematic diagram of the structure of a vehicle battery charging electronic device for high-temperature environments disclosed in an embodiment of the present invention.

[0078] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept of this application in any way, but rather to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0079] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0080] In recent years, with the development of power battery technology for new energy vehicles and the popularization of charging piles on urban roads, battery management systems have struggled to meet the requirements of users in various energy scenarios. When new energy vehicles are charging at charging piles in high-temperature environments, due to the electrochemical characteristics and safety of lithium-ion batteries, the battery management system requests a lower charging current. After the air conditioning in the vehicle is cooled and low-voltage electrical appliances are turned on, the charging current of the battery will decrease or the SOC will decrease instead of increase during the charging process, failing to meet the fast charging requirements of the vehicle. The decrease in SOC during the charging process brings a poor driving experience to users.

[0081] Please see Figure 1 , Figure 1 This is a schematic diagram illustrating an application scenario of a vehicle battery charging method for low-temperature environments disclosed in an embodiment of the present invention. Figure 1As shown, a common topology diagram for a vehicle battery system with a high-voltage system can be presented in the form shown in the diagram. The left half of the power battery system is used to complete the pre-charging and fast charging processes of the battery, as detailed in the relevant implementation method in Embodiment 2 of this application. The load section can be a four-in-one main and auxiliary drive system. In addition, the vehicle also has some low-voltage loads. To meet the cooling requirements of the battery in some application scenarios, a liquid cooling device can also be connected. However, the liquid cooling device can be directly controlled by the vehicle control system by sending corresponding signals, and its connection can be a physical mechanical connection without needing to be electrically connected to the battery system.

[0082] Regarding the issue of SOC decline in power battery vehicles during charging at high temperatures, current solutions consider monitoring the current SOC value and temperature of the power battery to reduce thermal management energy consumption in high-temperature environments. However, they do not consider the phenomenon that the charging SOC will decrease instead of increase when the charging pile output current is less than the current required by the vehicle's electrical devices during charging. They also do not consider the matching of the charging pile output current with the charging current requested by the battery management system under different power usage conditions in high-temperature environments.

[0083] For example, a thermal management control method and device for a power battery, when the vehicle is in a preset constant high temperature charging condition, acquires the current SOC value and current temperature of the vehicle's power battery, and acquires the charging information of the charging equipment, determines whether the vehicle will meet the preset over-temperature condition during the charging process, and if the preset over-temperature condition is met, matches a cooling strategy that meets the condition for the power battery, so as to control the maximum temperature of the power battery to be less than the maximum temperature index under the corresponding cooling strategy.

[0084] For example, a high-temperature charging test method and device uses software simulation to simulate the device under test rising from an initial temperature to a target temperature under various types of heating scenarios for high-temperature charging testing. The high-temperature charging test measures the parameter information of the device under test when its internal temperature reaches the preset temperature. Compared with the data obtained in the traditional high-temperature environment, it can better reflect the real data of the device under test at the preset temperature, and the test accuracy is higher.

[0085] The technical concept of this application is to adjust the output current of the charging pile according to the output power of the whole vehicle for different power consumption states of the vehicle under high temperature environment, so as to ensure that the power consumption needs of the vehicle under different states are met: the output current of the charging pile ≥ the output current of the whole vehicle's required power + the fast charging current of the battery at the corresponding temperature + the output current of the battery pack when the thermal management is turned on.

[0086] Specifically, the charging mode is adjusted for low-charge batteries in high-temperature environments at different temperature thresholds. When the Battery Management System (BMS) detects that the target battery module temperature T is in the first temperature range, the pure charging mode is activated; when T is in the second temperature range, the liquid cooling and charging mode is activated; when T is in the third temperature range, charging is prohibited, and the BMS activates liquid cooling and disables the charging function through thermal management.

[0087] Furthermore, based on the varying degrees of high-temperature environments, the battery management system (BMS) uses temperature sensors to collect data and adjusts the current request signal value sent by the BMS to the charging station, ensuring that the vehicle meets its power consumption and fast charging requirements under different ambient temperature conditions.

[0088] Example 1

[0089] Please see Figure 2 , Figure 2 This is a schematic flowchart of a vehicle battery charging method for high-temperature environments disclosed in an embodiment of the present invention. Figure 2 As shown, the method includes:

[0090] S101. Obtain the module temperature of the target battery;

[0091] The module temperature is used to determine its relative relationship with a preset threshold, which in turn determines the charging mode. The charging mode may involve temperature management and temperature regulation processes, which can be considered as part of the thermal management process mentioned later.

[0092] S102. Determine the charging mode based on the module temperature and preset threshold.

[0093] The charging mode can be used to determine the requested current and to adjust the module temperature, so that the battery module temperature is under preset safe operating conditions. This allows parameters such as SOC value, temperature, current magnitude, and load to be matched, thereby ensuring the safety and efficiency of the charging process and reducing the phenomenon of SOC decreasing instead of increasing.

[0094] Adjusting the charging mode for low-charge batteries based on different temperature thresholds in high-temperature environments ensures that the vehicle can start normally in high-temperature environments and reduces the impact of high-temperature environments on battery life.

[0095] S103. Determine the requested current according to the charging mode, and obtain the corresponding current from the charging pile to charge the target battery according to the requested current.

[0096] The requested current is used to indicate the amount of current required to fast charge the target battery.

[0097] The requested current is related to the charging mode and should be able to cover the charging current required by the load and the corresponding charging mode. This ensures that the charging current in fast charging mode is sufficient to meet the vehicle's power demand during charging, thus guaranteeing the fast charging capability of the power battery in high-temperature environments and avoiding the phenomenon of slow battery charging in high-temperature environments.

[0098] Furthermore, in conjunction with the battery's thermal management process, the requested current is related to the total output current of the vehicle's electrical devices under high temperature conditions, the output current of the battery when thermal management is activated under high temperature conditions, and the normal charging current of the battery under high temperature conditions. Therefore, adjusting the BMS's requested current for the charging pile can avoid the situation where the power battery's SOC decreases during charging due to the activation of thermal management when the ambient temperature is high.

[0099] The high-temperature environment vehicle battery charging method provided in this embodiment obtains the module temperature of the target battery, determines the charging mode and required current under the corresponding temperature environment based on the module temperature, so that the output of the charging pile can cover the fast charging needs of the target battery and the low-voltage load consumption of the whole vehicle, and meets the safety and charging conditions of the battery under various temperature conditions. This improves the efficiency and practicality of current regulation, and also improves the safety and service life of battery applications.

[0100] Example 2

[0101] Please see Figure 3 , Figure 3 This is a schematic flowchart of another vehicle battery charging method for high-temperature environments disclosed in an embodiment of the present invention. Figure 3 As shown, the preset threshold includes a first threshold and a second threshold, where the first threshold is lower than the second threshold. The method includes:

[0102] S201, Obtain the module temperature of the target battery;

[0103] S202. If the module temperature is higher than the first threshold, the charging mode is set to pure cooling mode, the vehicle battery cooling device is controlled to work, and the cooling process is started until the module temperature drops to the first threshold or the charging pile stops working.

[0104] S203. If the module temperature is not higher than the first threshold but higher than the second threshold, the charging mode is determined to be the cooling and charging mode, the vehicle battery cooling device is controlled to be in working state, and the cooling process is started until the module temperature drops to the second threshold or the charging pile stops working.

[0105] S204. If the module temperature is not higher than the second threshold, the charging mode is determined to be pure charging mode, and the vehicle battery cooling device is controlled to be in a deactivated state.

[0106] S205. Determine the requested current according to the charging mode, and obtain a corresponding current from the charging pile to charge the target battery according to the requested current.

[0107] The requested current is used to indicate the amount of current required to fast charge the target battery.

[0108] It should be noted that the aforementioned charging mode determination process, especially the cooling process, can be implemented as part of the thermal management process mentioned later, together with the thermal management-related implementation methods in this embodiment.

[0109] When the module temperature is higher than the first threshold, it can also be described as the module temperature being in the first temperature range. Correspondingly, when the module temperature is not higher than the first threshold but higher than the second threshold, it can also be described as the module temperature being in the second temperature range. When the module temperature is not higher than the second threshold, it can be described as the module temperature being in the third temperature range.

[0110] As an optional implementation, the charging mode is either a pure cooling mode or a simultaneous cooling and charging mode, and the method further includes:

[0111] Obtain the cooling operating parameters of the target battery;

[0112] The cooling operating parameters include cooling time, cell temperature change, and battery charge energy.

[0113] If the charging mode is pure cooling mode, then based on the cooling operating parameters and the corresponding first fault condition, it is determined whether a first cooling fault occurs during the cooling process. If a cooling fault is determined to occur during the cooling process, the cooling process is stopped.

[0114] The first fault condition includes: if the cooling time exceeds the time threshold and the cell temperature change is lower than the change threshold, or the battery charge energy is lower than the charge threshold, then the first cooling fault is determined to have occurred during the cooling process.

[0115] If the charging mode is the simultaneous cooling and charging mode, then based on the cooling operating parameters and the corresponding second fault condition, it is determined whether a second cooling fault occurs during the cooling process. If a cooling fault is determined to occur during the cooling process, then the cooling process is stopped.

[0116] The second fault condition includes: if the module temperature is less than the fault threshold and the number of times the thermal management signal is restarted exceeds a preset value, then a second cooling fault is determined to have occurred during the cooling process.

[0117] It should be noted that the aforementioned cooling fault monitoring process can also be implemented as part of the thermal management process, together with the thermal management-related implementation methods in this embodiment.

[0118] Battery state-of-charge (SOC) is a key parameter that needs to be monitored during the cooling process. Setting different charging modes aims to ensure that the output current and SOC meet the conditions for normal charging. In addition, cooling time and changes in cell temperature can also be used to determine whether a fault has occurred in the current cooling process, thus ensuring the safety of the cooling process.

[0119] Specifically, as an example, in pure cooling mode, if the cell temperature changes by less than 5°C within 30 minutes of cooling being turned on, the BMS will report a thermal management fault and stop cooling; if the cell SOC is below 5%, battery discharge cooling will be prohibited.

[0120] In the cooling-while-charging mode, if the maximum temperature is less than 20°C and the number of requests to restart the thermal management signal exceeds 5, the BMS will report a thermal management circuit fault and end the charging process.

[0121] By acquiring cooling operating parameters, it is possible to determine whether a cooling fault exists and to promptly cut off the cooling process when a cooling fault occurs, thus ensuring the safety of the charging process and improving the battery's lifespan.

[0122] As an optional implementation, the requested current is determined based on the charging mode, including:

[0123] If the charging mode is a simultaneous cooling and charging mode, the first charging current is determined based on the module temperature, and the first load current of the vehicle battery cooling device and the second load current of the vehicle low-voltage electrical device are obtained. The requested current is determined based on the first charging current, the first load current and the second load current.

[0124] If the charging mode is pure charging mode, then the second charging current and the third load current of the vehicle's low-voltage electrical devices are determined, and the requested current is determined based on the second charging current and the third load current.

[0125] Specifically, after the BMS enters the charging process, it first detects the module temperature T of the target battery. When T is in the first temperature range, it requests to start cooling. The BMS prohibits charging and enters pure cooling mode until the highest temperature of the battery module reaches the first threshold or the charging pile ends the charging.

[0126] When the cooling mode is activated and the battery module temperature reaches the first threshold, cooling can be requested to begin. The BMS enters a cooling-while-charging mode. Based on the sub-ranges of the second temperature range, such as 5℃~10℃ below the first threshold and 10℃~15℃ below the first threshold, the module temperature can be divided into two different ranges. The battery charging current I2 can be controlled. At this time, the BMS collects the liquid cooling operating current I3. The power management system sends the vehicle's low-voltage power current I4 to the BMS and adjusts the current requested by the BMS from the charging pile to I5 = I2 + I3 + I4.

[0127] When the target battery module temperature reaches the third temperature range, the battery cooling mode is turned off, the BMS enters the pure charging mode, the BMS outputs the charging current I2 according to the charging power meter, the power management system collects the low voltage current of the whole vehicle I4 and sends it to the BMS, and adjusts the BMS to request the current I5 = I2 + I4 from the charging pile.

[0128] The output current I1 of the charging pile should be at least no less than I5 to ensure that the battery is charged normally and to avoid a decrease in charging current and SOC during the charging process.

[0129] By determining the charging mode, the vehicle's load current and the charging current required for charging can be obtained. Based on the load current and the charging current, the corresponding requested current can be determined. The magnitude of the requested current should cover the sum of the load current and the charging current, thereby improving the efficiency and practicality of current regulation and ensuring the effectiveness of the charging process.

[0130] As an optional implementation method, the charging mode is either a cooling-while-charging mode or a pure charging mode.

[0131] Before obtaining a corresponding current from the charging station to charge the target battery based on the requested current, the method further includes:

[0132] Perform charging preprocessing operations;

[0133] Close the negative contactor, and after a first delay, close the pre-charge contactor to perform a pre-charge operation on the target battery for a preset pre-charge duration. Then close the positive contactor and after a second delay, disconnect the pre-charge relay.

[0134] The system sends a pre-charging completion message and a current request to the charging station via the bus, and closes the fast charging contactor.

[0135] Specifically, the charging preprocessing operation can include self-test operation, parameter configuration operation, and initialization operation. For example, when charging in a high-temperature environment, after connecting the charging pile, the charging wakes up the BMS. After the BMS completes the normal high-voltage power-on after a fault-free self-test, it checks whether the national standard DC charging has entered the parameter configuration stage. First, the negative contactor is closed and delayed for 100ms (TBD), then the BMS closes the pre-charge contactor. After 1s (TBD) of pre-charging, the BMS closes the positive contactor. After another 100ms (TBD), the BMS disconnects the pre-charge relay. The BMS sends a high-voltage circuit working status pre-charge completion information on the bus. The BMS closes the fast-charging contactor, and the charging pile outputs current to start charging according to the request current signal sent by the BMS on the bus.

[0136] It should be noted that TBD in parentheses indicates that the value is a preset value to be determined, which is a reference value to meet the preset operating conditions.

[0137] By employing charging pre-processing and pre-charging procedures, the circuitry is provided with the necessary operating conditions for the fast charging process, thereby improving charging efficiency and the effectiveness of fast charging.

[0138] As an optional implementation, the charging mode is determined based on the module temperature and a preset threshold, including:

[0139] The thermal management process is determined based on the module temperature, preset threshold, and ambient temperature at which the battery operates.

[0140] The charging mode is determined based on the thermal management process;

[0141] The thermal management process is used to determine the charging mode based on the module temperature and control the charging process. When the corresponding data meets the preset temperature control loop fault conditions or charging prohibition fault conditions, the target battery is controlled to end charging.

[0142] The temperature control circuit includes either a heating circuit or a cooling circuit.

[0143] By analyzing the ambient temperature at which the battery operates, it can be determined whether the target battery requires a thermal management process, and what specific management content is included in the thermal management process. This allows for adaptive adjustment of the target battery's module temperature and monitoring of various data during the charging process, thereby improving the efficiency and practicality of current regulation and ensuring charging safety.

[0144] Please see Figure 4 , Figure 4 This is a schematic flowchart of another vehicle battery charging method in a high-temperature environment disclosed in an embodiment of the present invention, used to illustrate the data adjustment and monitoring process of the vehicle battery charging process after thermal management is activated. Figure 4 As shown, when preset conditions are met, the thermal management process of the BMS can be triggered, or the corresponding thermal management process can be directly activated when connecting to a charging pile, so as to ensure safety throughout the charging process.

[0145] Specifically, after plugging in the charging gun and receiving the charging station ready message (CRO), the BMS begins to determine whether thermal management is needed before requesting charging current. The value n is assigned as 0.

[0146] The values ​​mentioned are all preset values ​​to be determined. These values ​​are reference values ​​to meet the preset working conditions.

[0147] The key thermal management processes may include the following aspects:

[0148] If the minimum temperature T is greater than 33℃, request the temperature management system to activate cooling. At this time, charge according to the charging strategy of cooling while charging. When the maximum temperature of the battery module is less than 30℃, request to turn off the cooling function.

[0149] If the minimum temperature is below 0°C, thermal management is activated and a current of 12.5A is requested. Charging is not allowed at this time. When the minimum temperature is above 0°C, thermal management is activated and charging begins according to the charging strategy.

[0150] If the minimum temperature is 15≤T≤30℃, heating stops, and n=n+1 is assigned. At this time, the BMS turns off thermal management and charges according to the charging strategy.

[0151] When n > 5, a thermal management fault is reported, and charging ends.

[0152] It should be noted that even in high-temperature environments, heating steps may be involved in the thermal management process to ensure the highest possible safety and efficiency during battery charging and operation. The high temperature is used to describe the ambient temperature of the battery operation, not the module temperature of the battery itself.

[0153] The thermal management process describes the data processing for temperature control during battery charging. While related to electricity, it should not be confused with it. The aforementioned embodiments included some steps of the thermal management process, but also steps of the electrical management process. This embodiment focuses on illustrating the thermal management process.

[0154] The thermal management process involves data coordination between the battery management system and the temperature management system, while the electrical management process involves data coordination between the battery management system and the power management system. Those skilled in the art should understand this.

[0155] In addition, the diagram shows the minimum and maximum module temperatures. These two temperatures can be understood as the minimum and maximum module temperatures obtained by monitoring the target battery within a preset temperature acquisition period. They can also be understood as the minimum and maximum module temperatures of different parts inside the same target battery at a certain moment. In other words, the module temperature can have two values. During thermal management, both the minimum and maximum module temperatures can be used to set data processing conditions.

[0156] This embodiment can determine three preset temperature ranges through the first threshold and the second threshold. Based on the relationship between the target battery and the two thresholds, the current charging mode can be determined. According to the determined charging mode, the corresponding temperature adjustment process or direct charging is executed, which ensures the effectiveness and charging efficiency of the battery under various temperature environments, that is, improves the efficiency and practicality of current regulation, as well as the adaptability to the operating temperature.

[0157] Example 3

[0158] This invention also provides a vehicle battery charging device for high-temperature environments to implement the aforementioned method. Please refer to [link to relevant documentation]. Figure 5 , Figure 5 This is a schematic diagram of the structure of a vehicle battery charging device for high-temperature environments, as disclosed in an embodiment of the present invention. Figure 5 As shown, based on any other embodiment, the apparatus includes:

[0159] Acquisition module 31 is used to acquire the module temperature of the target battery;

[0160] The processing module 32 is used to determine the charging mode based on the module temperature and a preset threshold.

[0161] The processing module 32 is also used to determine the requested current according to the charging mode, and to obtain a corresponding current from the charging pile to charge the target battery according to the requested current.

[0162] The requested current is used to indicate the amount of current required to fast charge the target battery.

[0163] By acquiring the module temperature of the target battery, the charging mode and required current under the corresponding temperature environment are determined based on the module temperature. This enables the output of the charging pile to cover the fast charging needs of the target battery and the low-voltage load consumption of the vehicle, and to meet the safety and charging conditions of the battery under various temperature conditions. This improves the efficiency and practicality of current regulation, and also enhances the safety and lifespan of battery applications.

[0164] As an optional implementation, the preset threshold includes a first threshold and a second threshold, wherein the first threshold is higher than the second threshold;

[0165] Furthermore, the processing module determines the specific charging mode based on the module temperature and preset thresholds, including:

[0166] If the module temperature is higher than the first threshold, the charging mode will be set to pure cooling mode, the vehicle battery cooling device will be put into operation, and the cooling process will be started until the module temperature drops to the first threshold or the charging pile stops working.

[0167] If the module temperature is not higher than the first threshold but higher than the second threshold, the charging mode will be set to the cooling-while-charging mode, the vehicle battery cooling device will be kept in working state, and the cooling process will be started until the module temperature drops to the second threshold or the charging pile stops working.

[0168] If the module temperature is not higher than the second threshold, the charging mode will be set to pure charging mode, and the vehicle battery cooling device will be turned off.

[0169] Three preset temperature ranges can be determined by using the first and second thresholds. Based on the relationship between the target battery and these two thresholds, the current charging mode can be determined. According to the determined charging mode, the corresponding temperature adjustment process or direct charging is executed, which ensures the effectiveness and efficiency of battery charging in various temperature environments, thereby improving the efficiency and practicality of current regulation and adaptability to operating temperature.

[0170] As an optional implementation method, the charging mode is either a pure cooling mode or a mode that charges while cooling.

[0171] The acquisition module 31 is also used to acquire the cooling operating parameters of the target battery;

[0172] The cooling operating parameters include cooling time, cell temperature change, and battery charge energy.

[0173] The processing module 32 is also used to determine whether a first cooling fault occurs during the cooling process based on the cooling working parameters and the corresponding first fault condition if the charging mode is a pure cooling mode; if a cooling fault is determined to occur during the cooling process, the cooling process is stopped.

[0174] The first fault condition includes: if the cooling time exceeds the time threshold and the cell temperature change is lower than the change threshold, or the battery charge energy is lower than the charge threshold, then the first cooling fault is determined to have occurred during the cooling process.

[0175] The processing module 32 is also used to determine whether a second cooling fault occurs during the cooling process based on the cooling working parameters and the corresponding second fault condition if the charging mode is a cooling-while-charging mode; if a cooling fault is determined to occur during the cooling process, the cooling process is stopped.

[0176] The second fault condition includes: if the module temperature is less than the fault threshold and the number of times the thermal management signal is restarted exceeds a preset value, then a second cooling fault is determined to have occurred during the cooling process.

[0177] By acquiring cooling operating parameters, it is possible to determine whether a cooling fault exists and to promptly cut off the cooling process when a cooling fault occurs, thus ensuring the safety of the charging process and improving the battery's lifespan.

[0178] As an optional implementation, the processing module 32 determines the specific method of requesting current based on the charging mode, including:

[0179] If the charging mode is a simultaneous cooling and charging mode, the first charging current is determined based on the module temperature, and the first load current of the vehicle battery cooling device and the second load current of the vehicle low-voltage electrical device are obtained. The requested current is determined based on the first charging current, the first load current and the second load current.

[0180] If the charging mode is pure charging mode, then the second charging current and the third load current of the vehicle's low-voltage electrical devices are determined, and the requested current is determined based on the second charging current and the third load current.

[0181] By determining the charging mode, the vehicle's load current and the charging current required for charging can be obtained. Based on the load current and the charging current, the corresponding requested current can be determined. The magnitude of the requested current should cover the sum of the load current and the charging current, thereby improving the efficiency and practicality of current regulation and ensuring the effectiveness of the charging process.

[0182] As an optional implementation method, the charging mode is either a cooling-while-charging mode or a pure charging mode.

[0183] The processing module 32 is also used to charge the target battery before obtaining a current of the corresponding magnitude from the charging pile according to the requested current.

[0184] Perform charging preprocessing operations;

[0185] Close the negative contactor, and after a first delay, close the pre-charge contactor to perform a pre-charge operation on the target battery for a preset pre-charge duration. Then close the positive contactor and after a second delay, disconnect the pre-charge relay.

[0186] The system sends a pre-charging completion message and a current request to the charging station via the bus, and closes the fast charging contactor.

[0187] By employing charging pre-processing and pre-charging procedures, the circuitry is provided with the necessary operating conditions for the fast charging process, thereby improving charging efficiency and the effectiveness of fast charging.

[0188] As an optional implementation, the processing module 32 determines the specific method of the charging mode based on the module temperature and a preset threshold, including:

[0189] The thermal management process is determined based on the module temperature, preset threshold, and ambient temperature at which the battery operates.

[0190] The charging mode is determined based on the thermal management process;

[0191] The thermal management process is used to determine the charging mode based on the module temperature and control the charging process. When the corresponding data meets the preset temperature control loop fault conditions or charging prohibition fault conditions, the target battery is controlled to end charging.

[0192] The temperature control circuit includes either a heating circuit or a cooling circuit.

[0193] By analyzing the ambient temperature at which the battery operates, it can be determined whether the target battery requires a thermal management process, and what specific management content is included in the thermal management process. This allows for adaptive adjustment of the target battery's module temperature and monitoring of various data during the charging process, thereby improving the efficiency and practicality of current regulation and ensuring charging safety.

[0194] Example 4

[0195] This application also provides an electronic device, including:

[0196] At least one processor; and

[0197] A memory that is communicatively connected to at least one processor; wherein,

[0198] The memory stores instructions that can be executed by at least one processor to enable the at least one processor to perform the method as in any embodiment.

[0199] This application also provides a computer-readable storage medium storing computer-executable instructions that, when executed by a processor, are used to implement the method as described in any of the embodiments.

[0200] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of an electronic device disclosed in an embodiment of the present invention. For example... Figure 6 As shown, the electronic device may include:

[0201] The device includes a processor 291 and a memory 292 storing executable program code; it may also include a communication interface 293 and a bus 294. The processor 291, memory 292, and communication interface 293 can communicate with each other via the bus 294. The communication interface 293 can be used for information transmission. The processor 291 is coupled to the memory 292, and the processor 291 can call logical instructions (executable program code) in the memory 292 to execute the text processing model training method of any of the above embodiments.

[0202] Furthermore, the logic instructions in the aforementioned memory 292 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium.

[0203] The memory 292, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of this application. The processor 291 executes functional applications and data processing by running the software programs, instructions, and modules stored in the memory 292, thereby implementing the methods in the above-described method embodiments.

[0204] The memory 292 may include a program storage area and a data storage area. The program storage area may store the operating system and application programs required for at least one function; the data storage area may store data created based on the use of the terminal device. Furthermore, the memory 292 may include high-speed random access memory and may also include non-volatile memory.

[0205] This invention also provides a computer-readable storage medium storing computer-executable instructions, which, when invoked, are used to implement the method in any of the embodiments.

[0206] This invention also discloses a computer program product, which includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to cause a computer to perform the steps in the text processing model training method described in any embodiment.

[0207] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules; that is, they may be located in one place or distributed across multiple network modules. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0208] Through the detailed description of the above embodiments, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, including read-only memory (ROM), random access memory (RAM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), one-time programmable read-only memory (OTPROM), electrically-Erasable Programmable Read-Only Memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0209] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0210] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A method for charging a vehicle battery in a high-temperature environment, characterized in that, The method includes: Obtain the module temperature of the target battery; The charging mode is determined based on the module temperature and a preset threshold. Based on the charging mode, the requested current is determined, and based on the requested current, a corresponding current is obtained from the charging pile to charge the target battery. The requested current is used to indicate the current required to fast charge the target battery. If the charging mode is a simultaneous cooling and charging mode, then the first charging current is determined based on the module temperature, and the first load current of the vehicle battery cooling device and the second load current of the vehicle low-voltage electrical device are obtained. The requested current is determined based on the first charging current, the first load current and the second load current. If the charging mode is a pure charging mode, then the second charging current and the third load current of the vehicle's low-voltage electrical device are determined, and the requested current is determined based on the second charging current and the third load current. After determining the charging mode, the following is also included: Obtain the cooling operating parameters of the target battery; the cooling operating parameters include cooling time, cell temperature change, and battery charge energy. If the charging mode is a pure cooling mode, then based on the cooling operating parameters and the corresponding first fault condition, it is determined whether a first cooling fault occurs during the cooling process. If a cooling fault is determined to occur during the cooling process, the cooling process is stopped. The first fault condition includes: if the cooling time exceeds the time threshold and the cell temperature change is lower than the change threshold, or the battery charge energy is lower than the charge threshold, then it is determined that a first cooling fault has occurred during the cooling process. If the charging mode is a simultaneous cooling and charging mode, then based on the cooling operating parameters and the corresponding second fault condition, it is determined whether a second cooling fault occurs during the cooling process. If a cooling fault is determined to occur during the cooling process, then the cooling process is stopped. The second fault condition includes: if the module temperature is less than the fault threshold and the number of times the thermal management signal is restarted exceeds a preset value, then a second cooling fault is determined to have occurred during the cooling process.

2. The method according to claim 1, characterized in that, The preset threshold includes a first threshold and a second threshold, wherein the first threshold is higher than the second threshold; And, determining the charging mode based on the module temperature and a preset threshold includes: If the module temperature is higher than the first threshold, the charging mode is set to pure cooling mode, the vehicle battery cooling device is controlled to work, and the cooling process is started until the module temperature drops to the first threshold or the charging pile stops working. If the module temperature is not higher than the first threshold but higher than the second threshold, the charging mode is determined to be a cooling-while-charging mode, the vehicle battery cooling device is controlled to be in working state, and the cooling process is started until the module temperature drops to the second threshold or the charging pile stops working. If the module temperature is not higher than the second threshold, the charging mode is determined to be pure charging mode, and the vehicle battery cooling device is controlled to be in a deactivated state.

3. The method according to claim 2, characterized in that, The charging mode is either a cooling-while-charging mode or a pure charging mode. Before obtaining a current of the corresponding magnitude from the charging pile to charge the target battery according to the requested current, the method further includes: Perform charging preprocessing operations; Close the negative contactor, and after a first delay, close the pre-charge contactor to perform a pre-charge operation for a preset pre-charge duration on the target battery. Then close the positive contactor and after a second delay, disconnect the pre-charge relay. The system sends a pre-charging completion message and the requested current to the charging pile via the bus, and then closes the fast charging contactor.

4. The method according to claim 1, characterized in that, The step of determining the charging mode based on the module temperature and a preset threshold includes: The thermal management process is determined based on the module temperature, the preset threshold, and the ambient temperature at which the battery operates. The charging mode is determined based on the aforementioned thermal management process; The thermal management process is used to determine the charging mode based on the module temperature and control the charging process, and to control the target battery to end charging when the corresponding data meets the preset temperature control loop fault condition or charging prohibition fault condition. The temperature control circuit includes either a heating circuit or a cooling circuit.

5. A vehicle battery charging device for high-temperature environments, characterized in that, The device includes: The acquisition module is used to acquire the module temperature of the target battery. The processing module is used to determine the charging mode based on the module temperature and a preset threshold. The processing module is further configured to determine the requested current according to the charging mode, and obtain a corresponding current from the charging pile to charge the target battery according to the requested current. The requested current is used to indicate the current required to fast charge the target battery. The processing module is specifically configured to: if the charging mode is a simultaneous cooling and charging mode, determine a first charging current based on the module temperature, and obtain a first load current of the vehicle battery cooling device and a second load current of the vehicle low-voltage electrical device, and determine a requested current based on the first charging current, the first load current, and the second load current; if the charging mode is a pure charging mode, determine a second charging current and a third load current of the vehicle low-voltage electrical device, and determine a requested current based on the second charging current and the third load current. After determining the charging mode, the acquisition module is further configured to acquire the cooling operating parameters of the target battery; the cooling operating parameters include cooling time, cell temperature change, and battery charge energy. The processing module is further configured to, if the charging mode is a pure cooling mode, determine whether a first cooling fault occurs during the cooling process based on the cooling operating parameters and the corresponding first fault condition; if a cooling fault is determined to occur during the cooling process, stop the cooling process; wherein, the first fault condition includes: if the cooling time exceeds a time threshold and the cell temperature change is lower than a change threshold, or the battery charge energy is lower than a charge threshold, then it is determined that a first cooling fault has occurred during the cooling process. The processing module is further configured to, if the charging mode is a cooling-while-charging mode, determine whether a second cooling fault occurs during the cooling process based on the cooling operating parameters and the corresponding second fault condition; if a cooling fault is determined to occur during the cooling process, the cooling process is stopped; wherein, the second fault condition includes: if the module temperature is less than a fault threshold and the number of times the thermal management signal is restarted exceeds a preset value, then a second cooling fault is determined to occur during the cooling process.

6. The apparatus according to claim 5, characterized in that, The preset threshold includes a first threshold and a second threshold, wherein the first threshold is higher than the second threshold; Furthermore, the specific method by which the processing module determines the charging mode based on the module temperature and a preset threshold includes: If the module temperature is higher than the first threshold, the charging mode is set to pure cooling mode, the vehicle battery cooling device is controlled to work, and the cooling process is started until the module temperature drops to the first threshold or the charging pile stops working. If the module temperature is not higher than the first threshold but higher than the second threshold, the charging mode is determined to be a cooling-while-charging mode, the vehicle battery cooling device is controlled to be in working state, and the cooling process is started until the module temperature drops to the second threshold or the charging pile stops working. If the module temperature is not higher than the second threshold, the charging mode is determined to be pure charging mode, and the vehicle battery cooling device is controlled to be in a deactivated state.

7. An electronic device, comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the method as described in any one of claims 1-4.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions, which, when executed by a processor, are used to implement the method as described in any one of claims 1-4.

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