A charging temperature control method and device, vehicle, charging equipment and medium

Abstract

The application discloses a charging temperature control method and device, a vehicle, a charging device and a medium. The method comprises the following steps: when the vehicle is connected to the charging device, a first temperature of a battery pack is obtained; if the first temperature is lower than a first temperature threshold, the battery pack is heated to obtain a second temperature of the battery pack, and the heating power of the battery pack is compared with the charging power; if the heating power is lower than the charging power and the second temperature is higher than a second temperature threshold, the battery pack is charged and heated until a first voltage of the battery pack reaches a preset voltage threshold; if the heating power is higher than the charging power, a third temperature threshold is determined based on the second temperature and the current power of the battery pack, and the battery pack is discharged and heated until a third temperature of the battery pack is higher than the third temperature threshold, and then the battery pack is charged until a second voltage of the battery pack reaches the preset voltage threshold. The application can improve the battery charging efficiency.

Description

Technical Field

[0001] This application relates to the field of vehicle charging, and more particularly to a charging temperature control method, device, vehicle, charging equipment, and medium. Background Technology

[0002] In low-temperature environments, the chemical reactions inside the battery slow down, preventing it from reaching a suitable temperature and thus hindering its full performance. This impacts charging efficiency and may even damage the battery. Furthermore, the increased internal resistance and slower chemical reaction rate at low temperatures affect the actual charging speed, even with the same charging power, leading to decreased charging efficiency.

[0003] To address the issue of low charging efficiency in low-temperature environments, a preheating strategy has been employed in related technologies. In low-temperature environments, the current temperature of the battery pack is assessed before charging, and then the battery pack is heated by discharging the vehicle's battery pack to reach a suitable temperature. However, because the battery discharge rate is slow at low temperatures, the preheating time is long, increasing the charging time and even affecting the battery's lifespan. To avoid affecting the battery's lifespan, some manufacturers provide an additional battery heating device to heat the battery pack. However, this method increases the vehicle's manufacturing cost and consumes more energy when operating at low temperatures.

[0004] Application content

[0005] This application provides a charging temperature control method, apparatus, vehicle, charging equipment, and medium to enable the battery to quickly reach a suitable temperature, thereby improving battery charging efficiency.

[0006] In a first aspect, this application provides a charging temperature control method, including:

[0007] When the vehicle is connected to the charging equipment, the current first temperature of the battery pack is obtained;

[0008] If the first temperature is lower than the first temperature threshold, the battery pack is heated to obtain the second temperature of the battery pack, and the obtained heating power of the battery pack is compared with the charging power, wherein the charging power is the power output by the charging device;

[0009] If the heating power is lower than the charging power or the second temperature is higher than the second temperature threshold, the battery pack is charged and heated until the current first voltage of the battery pack reaches the preset voltage threshold.

[0010] If the heating power is higher than the charging power, a third temperature threshold is determined based on the second temperature and the current charge of the battery pack. The battery pack is then discharged and heated until the third temperature of the battery pack is higher than the third temperature threshold. Then, the battery pack is charged so that the second voltage of the battery pack reaches a preset voltage threshold.

[0011] This application embodiment heats the battery pack when the first temperature is below a first temperature threshold, raising the battery from a low-temperature state to a safe charging temperature, facilitating subsequent rapid charging. By comparing the obtained heating power of the battery pack with the charging power, charging and heating or discharging and heating can be performed based on the comparison between the heating power and the charging power of the charging device at different temperatures. Different strategies are then used to quickly bring the battery to a suitable temperature, thereby accelerating battery charging efficiency. By charging and heating the battery pack, charging can begin while maintaining the battery temperature, continuously raising the battery temperature to reach the optimal charging temperature range for rapid full charging. By discharging and heating the battery pack, the battery pack temperature can be ensured to quickly reach the suitable charging temperature threshold, thereby accelerating charging efficiency. Compared with existing technologies, this application enables the battery to quickly reach a suitable temperature, thereby improving battery charging efficiency.

[0012] Furthermore, the charging temperature control method also includes:

[0013] If the first temperature is higher than the second temperature threshold, the battery pack is charged and heated until the current third voltage of the battery pack reaches the preset voltage threshold.

[0014] By charging and heating the battery pack in this way, the battery can be charged while maintaining its temperature. The battery temperature can be continuously increased to reach the optimal charging temperature range, thus quickly charging the battery.

[0015] Furthermore, it also includes:

[0016] If the first temperature is higher than the fourth temperature threshold, the battery pack is charged until the current fourth voltage of the battery pack reaches the preset voltage threshold.

[0017] By charging the battery pack when the first temperature is above the fourth temperature threshold, which is the optimal temperature range for charging, the battery can be quickly fully charged.

[0018] Furthermore, the charging and heating of the battery pack until the current first voltage of the battery pack reaches a preset voltage threshold specifically involves:

[0019] The battery pack is charged and heated to obtain a fourth temperature of the battery pack;

[0020] If the fourth temperature is higher than the fourth temperature threshold, the battery pack is charged until the current first voltage of the battery pack reaches the preset voltage threshold.

[0021] By charging and heating the battery pack in this way, the battery can be charged while maintaining its temperature. The battery temperature can be continuously increased to reach the optimal charging temperature range, thus quickly charging the battery.

[0022] Furthermore, before the current first voltage of the battery pack reaches a preset voltage threshold, the method further includes:

[0023] The fifth temperature of the battery pack is obtained and compared with the fifth temperature threshold. If the fifth temperature is lower than the fifth temperature threshold, the battery pack is charged and heated until the sixth temperature is higher than the fifth temperature threshold.

[0024] By charging and heating the battery pack when its fifth temperature is below the fifth temperature threshold, the battery temperature can be kept within the optimal charging temperature range, thus enabling the battery to be fully charged quickly.

[0025] Furthermore, before the second voltage of the battery pack reaches a preset voltage threshold, the following steps are also included:

[0026] The seventh temperature of the battery pack is obtained and compared with the fifth temperature threshold. If the seventh temperature is lower than the fifth temperature threshold, the battery pack is charged and heated until the eighth temperature is higher than the fifth temperature threshold.

[0027] By charging and heating the battery pack when the seventh temperature is below the fifth temperature threshold, the battery temperature can be kept within the optimal charging temperature range, thus quickly charging the battery.

[0028] Secondly, this application provides a charging temperature control device, including: an acquisition module, a first processing module, a second processing module and a third processing module;

[0029] The acquisition module is used to acquire the current first temperature of the battery pack when the vehicle is connected to the charging equipment;

[0030] The first processing module is configured to heat the battery pack if the first temperature is lower than the first temperature threshold to obtain a second temperature of the battery pack, and compare the obtained heating power of the battery pack with the charging power, wherein the charging power is the power output by the charging device.

[0031] The second processing module is used to charge and heat the battery pack if the heating power is lower than the charging power or the second temperature is higher than the second temperature threshold, until the current first voltage of the battery pack reaches a preset voltage threshold.

[0032] The third processing module is used to determine a third temperature threshold based on the second temperature and the current charge of the battery pack if the heating power is higher than the charging power, and to discharge and heat the battery pack until the third temperature of the battery pack is higher than the third temperature threshold, and then charge the battery pack so that the second voltage of the battery pack reaches a preset voltage threshold.

[0033] This application embodiment heats the battery pack when the first temperature is below a first temperature threshold, raising the battery from a low-temperature state to a safe charging temperature, facilitating subsequent rapid charging. By comparing the heating power and charging power of the battery pack, charging and heating or discharging and heating can be performed based on the comparison between the heating power and the charging power of the charging device at different temperatures. Different strategies are then used to quickly bring the battery to a suitable temperature, thereby accelerating battery charging efficiency. By charging and heating the battery pack, charging can begin while maintaining the battery temperature, continuously increasing the battery temperature to reach the optimal charging temperature range for rapid full charging. By discharging and heating the battery pack, the battery pack temperature can be ensured to quickly reach the suitable charging temperature threshold, thus accelerating charging efficiency. Compared with existing technologies, this application enables the battery to quickly reach a suitable temperature, thereby accelerating battery charging efficiency.

[0034] Thirdly, this application provides a vehicle configured to perform the charging temperature control method as described in this application.

[0035] Fourthly, this application provides a charging device, the charging device including a controller, the controller including a memory, a processor and a computer program stored in the memory, the computer program being executed by the processor to implement the charging temperature control method as described in this application.

[0036] Fifthly, this application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the charging temperature control method as described in this application. Attached Figure Description

[0037] Figure 1 This is a flowchart illustrating one embodiment of the charging temperature control method provided in this application;

[0038] Figure 2This is a schematic diagram illustrating the relationship between different temperature thresholds and corresponding action commands provided in this application;

[0039] Figure 3 This is a schematic diagram of one embodiment of the charging temperature control device provided in this application. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0042] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0043] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0044] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0045] In low-temperature environments, the chemical reactions inside the battery slow down, preventing it from reaching the optimal temperature and thus hindering its performance. Due to the sluggish internal reactions, substandard temperature, and increased internal resistance, the actual charging speed is affected even with the same charging power. To address this issue, some technologies employ preheating strategies, assessing the battery temperature and discharging to heat it. However, slow discharge at low temperatures and prolonged preheating times increase charging time. Some manufacturers use additional heating devices, which are effective but increase manufacturing costs and energy consumption in low-temperature environments.

[0046] Based on this, embodiments of this application provide a charging temperature control method, device, vehicle, charging equipment, and medium, which utilizes a preset clustering algorithm to dynamically adjust the deployment of relay nodes according to the dynamic needs of the power system, thereby improving the service quality of the relay nodes.

[0047] This application provides a charging temperature control method, device, vehicle, charging equipment, and medium, which are specifically described through the following embodiments. First, the charging temperature control method in this application embodiment is described.

[0048] The charging temperature control method provided in this application relates to the field of vehicle charging. This method can be applied to a terminal, a server, or software running on either a terminal or a server. In some embodiments, the terminal can be a smartphone, tablet, laptop, desktop computer, etc.; the server can be configured as an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server providing basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communication, middleware services, domain name services, security services, CDN, and big data and artificial intelligence platforms; the software can be an application implementing a charging temperature control method, but is not limited to the above forms.

[0049] This application can also be used in numerous general-purpose or special-purpose computer system environments or configurations. Examples include: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics devices, network PCs, minicomputers, mainframe computers, and distributed computing environments including any of the above systems or devices. This application can be described in the general context of computer-executable instructions executed by a computer, such as program modules. Generally, program modules include routines, programs, objects, components, data structures, etc., that perform specific tasks or implement specific abstract data types. This application can also be practiced in distributed computing environments where tasks are performed by remote processing devices connected via a communication network. In distributed computing environments, program modules can reside in local and remote computer storage media, including storage devices.

[0050] Example 1

[0051] Please refer to Figure 1 , Figure 1 This is a flowchart of an embodiment of the charging temperature control method provided in this application, including steps S101 to S104.

[0052] S101, when the vehicle is connected to the charging equipment, obtain the current first temperature of the battery pack;

[0053] In some embodiments, when the plug of the charging device is inserted into the vehicle and locked, the charging gun establishes a physical connection with the on-board charger (OBC). After detecting this action, the on-board charger (OBC) sends a wake-up frame to wake up the battery management system (BMS). After receiving the wake-up frame sent by the OBC, the BMS initializes and checks the status of the charging interface. If the charging device is correctly connected, the BMS will evaluate the status of the battery, that is, obtain the current first temperature of the battery pack, where the first temperature is the initial temperature of the battery pack at the start of the charging process.

[0054] S102, if the first temperature is lower than the first temperature threshold, the battery pack is heated to obtain the second temperature of the battery pack, and the obtained heating power of the battery pack is compared with the charging power, wherein the charging power is the power output by the charging device;

[0055] In some embodiments, after obtaining the first temperature, it is necessary to compare the first temperature with different temperature thresholds to execute corresponding action instructions based on the comparison results. The action instructions include: heating only, charging and heating simultaneously, and charging only and discharging and heating simultaneously.

[0056] In some embodiments, when a first temperature is obtained, it needs to be compared with a first temperature threshold. If the first temperature is lower than the first temperature threshold, a heating relay or heating element can be controlled to close to heat the battery pack. In this case, the battery pack temperature needs to be monitored in real time until it rises from a low temperature to a second temperature suitable for safe charging. This process is called the heating-only process. During the heating-only process, it is also necessary to detect the type of the current charging device and obtain its maximum output power (i.e., charging power). Simultaneously, the heating power of the current battery pack is obtained, and the heating power is compared with the charging power to determine how to subsequently charge the battery pack based on the comparison result.

[0057] It should be noted that in the heating-only process, the charging power of the charging device is only used for heating the battery pack, that is, the charging power is equal to the heating power. Therefore, when there is a relationship between the charging power and the heating power, it means that the heating-only process has been skipped and other processes have begun.

[0058] In some embodiments, the method further includes: if the first temperature is higher than a second temperature threshold, charging and heating the battery pack until the current third voltage of the battery pack reaches a preset voltage threshold. Specifically, when the first temperature is obtained, it needs to be compared with the second temperature threshold. If the first temperature is higher than the second temperature threshold, it indicates that the battery pack temperature is safe for charging. In this case, the BMS will send a signal to the charging system, instructing it to charge the battery pack. Simultaneously, since a low ambient temperature will affect the first temperature of the battery pack, and the first temperature still needs to be maintained or raised to the optimal charging temperature range, the BMS will also send a signal to the thermal management system, instructing it to perform necessary heating of the battery pack. This process is the simultaneous charging and heating process. During the simultaneous charging and heating process, the third voltage of the battery pack also needs to be monitored in real time until the third voltage reaches the preset voltage threshold, i.e., the battery is fully charged. Then, charging ends, and the user is reminded to disconnect from the charging device.

[0059] In some embodiments, the battery pack can also be charged and heated simultaneously by closing both the heating relay and the main relay.

[0060] It should be noted that during the simultaneous charging and heating process, the charging power of the charging equipment is used for both charging and heating the battery pack. That is, the charging power of the charging equipment = heating power + battery charging power. Therefore, when the heating power is lower than the charging power, it indicates that this process is underway.

[0061] By charging and heating the battery pack in this way, the battery can be charged while maintaining its temperature. The battery temperature can be continuously increased to reach the optimal charging temperature range, thus quickly charging the battery.

[0062] In some embodiments, the method further includes: if the first temperature is higher than a fourth temperature threshold, then charging the battery pack until the current fourth voltage of the battery pack reaches a preset voltage threshold. Specifically, when the first temperature is obtained, it needs to be compared with the fourth temperature threshold. If the first temperature is higher than the fourth temperature threshold, it indicates that the temperature of the battery pack has reached the optimal charging temperature range. In this case, the BMS will send a signal to the charging system, instructing it to directly charge the battery pack; this process is the charging-only process. It should be noted that instructing it to directly charge the battery pack means charging the battery pack by closing the main relay, wherein the optimal charging temperature range is higher than the fifth temperature threshold but lower than the fourth temperature threshold.

[0063] By charging the battery pack when the first temperature is above the fourth temperature threshold, which is the optimal temperature range for charging, the battery can be quickly fully charged.

[0064] It should be noted that the first temperature threshold, the second temperature threshold, and subsequent third, fourth, and fifth temperature thresholds can all be understood as terms, and can all be set according to the battery status. A diagram illustrating the relationship between different temperature thresholds and their corresponding action commands is shown below. Figure 2 As shown, the first temperature threshold is used to determine whether to enter the heating-only phase, the second temperature threshold is used to determine whether to enter the simultaneous charging and heating phase, the third temperature threshold is used to determine whether to enter the simultaneous discharging and heating phase, the fourth temperature threshold is used to determine whether to enter the charging-only phase, and the fifth temperature threshold is used to determine whether to return to the simultaneous charging and heating phase during the charging phase. The order of temperature thresholds is: first temperature threshold < second temperature threshold < fifth temperature threshold < fourth temperature threshold, and first temperature threshold < third temperature threshold < fifth temperature threshold < fourth temperature threshold. The second and fourth temperature thresholds cannot be compared in magnitude.

[0065] S103, if the heating power is lower than the charging power or the second temperature is higher than the second temperature threshold, the battery pack is charged and heated until the current first voltage of the battery pack reaches the preset voltage threshold.

[0066] In some embodiments, when the heating power is lower than the charging power, it indicates that the charging and heating process is simultaneous. Since when the battery is heated in the heating-only phase, if the battery temperature, i.e., the second temperature, is higher than the second temperature threshold, it indicates that the temperature is safe for charging. However, since the optimal charging temperature range has not yet been reached, it is necessary to charge and heat the battery simultaneously.

[0067] In some embodiments, charging and heating the battery pack until the current first voltage of the battery pack reaches a preset voltage threshold includes: charging and heating the battery pack to obtain a fourth temperature of the battery pack; if the fourth temperature is higher than the fourth temperature threshold, then charging the battery pack until the current first voltage of the battery pack reaches the preset voltage threshold. Specifically, during the charging and heating phase of the battery pack, the BMS sends signals to the charging system and the thermal management system, instructing the charging system to charge the battery pack and instructing the thermal management system to heat the battery pack. During the simultaneous charging and heating process, the current fourth temperature of the battery pack needs to be detected and compared with the fourth temperature threshold. If the fourth temperature is higher than the fourth temperature threshold, it indicates that the temperature of the battery pack has reached the most suitable temperature for charging, and the main heating relay is disconnected to enter the charging-only phase. During the charging-only phase, the current first voltage of the battery pack needs to be monitored in real time until the first voltage reaches the preset voltage threshold, i.e., the battery is fully charged, then charging ends and the user is reminded to disconnect from the charging device. If the fourth temperature is lower than the fourth temperature threshold, then charging and heating of the battery pack continues.

[0068] By charging and heating the battery pack in this way, the battery can be charged while maintaining its temperature. The battery temperature can be continuously increased to reach the optimal charging temperature range, thus quickly charging the battery.

[0069] In some embodiments, before the first voltage of the battery pack reaches a preset voltage threshold, the method further includes: acquiring a fifth temperature of the battery pack and comparing the fifth temperature with a fifth temperature threshold; if the fifth temperature is lower than the fifth temperature threshold, charging and heating the battery pack until a sixth temperature is obtained that is higher than the fifth temperature threshold. Specifically, during the charging-only phase, the current fifth temperature of the battery pack needs to be monitored in real time and compared with a fifth temperature threshold. If the fifth temperature is lower than the fifth temperature threshold, it indicates that the battery pack is not within the optimal charging temperature range, so charging and heating of the battery pack are required simultaneously until the current sixth temperature of the battery pack is higher than the fifth temperature threshold, i.e., returning to the optimal charging temperature range.

[0070] By charging and heating the battery pack when its fifth temperature is below the fifth temperature threshold, the battery temperature can be kept within the optimal charging temperature range, thus enabling the battery to be fully charged quickly.

[0071] S104, if the heating power is higher than the charging power, then a third temperature threshold is determined based on the second temperature and the current charge of the battery pack, and the battery pack is discharged and heated until the third temperature of the battery pack is higher than the third temperature threshold, then the battery pack is charged so that the second voltage of the battery pack reaches a preset voltage threshold.

[0072] In some embodiments, when the heating power is higher than the charging power, it is necessary to read the current second temperature and current charge level of the battery pack. Then, by combining this information with the battery characteristic curve, it is determined whether to enter the simultaneous discharge and heating phase and to determine the third temperature threshold. In the simultaneous discharge and heating phase, the charging device and the battery pack simultaneously provide power for battery heating, with the battery pack sacrificing a portion of its charge level for heating. During the charging and heat dissipation process, it is necessary to continuously monitor the current third temperature of the battery pack and determine whether it is higher than the third temperature threshold. If the third temperature is higher than the third temperature threshold, it indicates that the charging and heat dissipation process has ended and the charging-only phase has begun. In this phase, the main heating circuit is disconnected, and the charging-only phase begins. During the charging-only phase, the current second voltage of the battery pack needs to be monitored in real time until the second voltage reaches a preset voltage threshold, i.e., the battery is fully charged. Then, charging ends, and the user is reminded to disconnect from the charging device.

[0073] It should be noted that, during the simultaneous charging and heat dissipation process, some battery power needs to be sacrificed to heat the battery pack so that it can quickly reach the optimal charging temperature. In this case, the heating power = charging power of the charging equipment + battery discharge power.

[0074] It should be noted that the battery cannot be discharged when the charge is too low.

[0075] It should be noted that the third temperature threshold can be pre-calculated based on battery pack testing and big data to obtain the corresponding parameter table, and determined based on the current power level and the third temperature.

[0076] In some embodiments, before the second voltage of the battery pack reaches a preset voltage threshold, the method further includes: acquiring a seventh temperature of the battery pack and comparing the seventh temperature with a fifth temperature threshold; if the seventh temperature is lower than the fifth temperature threshold, then charging and heating the battery pack until an eighth temperature is obtained that is higher than the fifth temperature threshold. Specifically, during the charging-only phase, it is necessary to monitor the current seventh temperature of the battery pack in real time and compare it with the fifth temperature threshold. If the seventh temperature is lower than the fifth temperature threshold, it indicates that it is not within the optimal charging temperature range. Therefore, it is necessary to close the heating relay to simultaneously charge and heat the battery pack until the current eighth temperature of the battery pack is higher than the fifth temperature threshold, that is, to return to the optimal charging temperature range.

[0077] By charging and heating the battery pack when the seventh temperature is below the fifth temperature threshold, the battery temperature can be kept within the optimal charging temperature range, thus quickly charging the battery.

[0078] This application embodiment heats the battery pack when the first temperature is below a first temperature threshold, raising the battery from a low-temperature state to a safe charging temperature, facilitating subsequent rapid charging. By comparing the obtained heating power of the battery pack with the charging power, charging and heating or discharging and heating can be performed based on the comparison between the heating power and the charging power of the charging device at different temperatures. Different strategies are then used to quickly bring the battery to a suitable temperature, thereby accelerating battery charging efficiency. By charging and heating the battery pack, charging can begin while maintaining the battery temperature, continuously raising the battery temperature to reach the optimal charging temperature range for rapid full charging. By discharging and heating the battery pack, the battery pack temperature can be ensured to quickly reach the suitable charging temperature threshold, thereby accelerating charging efficiency. Compared with existing technologies, this application enables the battery to quickly reach a suitable temperature, thereby improving battery charging efficiency.

[0079] Example 2

[0080] Please refer to Figure 3 , Figure 3 This is a schematic diagram of the structure of an embodiment of the charging temperature control device provided in this application, including: an acquisition module 100, a first processing module 200, a second processing module 300, and a third processing module 400;

[0081] The acquisition module 100 is used to acquire the current first temperature of the battery pack when the vehicle is connected to the charging equipment;

[0082] The first processing module 200 is used to heat the battery pack if the first temperature is lower than the first temperature threshold, to obtain a second temperature of the battery pack, and to compare the obtained heating power of the battery pack with the charging power, wherein the charging power is the power output by the charging device.

[0083] The second processing module 300 is used to charge and heat the battery pack if the heating power is lower than the charging power or the second temperature is higher than the second temperature threshold, until the current first voltage of the battery pack reaches a preset voltage threshold.

[0084] The third processing module 400 is used to determine a third temperature threshold based on the second temperature and the current charge of the battery pack if the heating power is higher than the charging power, and to discharge and heat the battery pack until the third temperature of the battery pack is higher than the third temperature threshold, and then charge the battery pack so that the second voltage of the battery pack reaches a preset voltage threshold.

[0085] The information interaction and execution process between the modules in the above-mentioned charging temperature control device are based on the same concept as the embodiment of the charging temperature control method of the first aspect of the present invention, and the technical effects achieved are basically the same. For details, please refer to the description in the first embodiment of the method of the present invention, which will not be repeated here.

[0086] The device embodiments described above are merely illustrative. The modules described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of the method in this embodiment, depending on actual needs.

[0087] The present invention also provides a vehicle configured to perform the charging temperature control method as described in Embodiment 1.

[0088] The present invention also provides a charging device, the charging device including a controller, the controller including a memory, a processor and a computer program stored in the memory, the computer program being executed by the processor to implement the charging temperature control method as described in Embodiment 1.

[0089] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, it implements the charging temperature control method as described in Embodiment 1 above.

[0090] Those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), or random access memory (RAM), etc.

[0091] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application.

[0092] In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A charge temperature control method characterized by, The application comprises the following steps: When the vehicle accesses the charging device, the current first temperature of the battery pack is obtained; If the first temperature is lower than the first temperature threshold, only heating is performed on the battery pack to obtain the second temperature of the battery pack, and the obtained heating power of the battery pack is compared with the charging power, wherein the charging power is the power output by the charging device; wherein, if the first temperature is higher than the second temperature threshold, the battery pack is simultaneously charged and heated until the current third voltage of the battery pack reaches the preset voltage threshold; If the heating power is lower than the charging power or the second temperature is higher than the second temperature threshold, the battery pack is simultaneously charged and heated until the current first voltage of the battery pack reaches the preset voltage threshold; If the heating power is higher than the charging power, whether the battery pack is simultaneously discharged and heated is determined based on the second temperature, the obtained current power of the battery pack and the battery characteristic curve; after entering the simultaneous discharging and heating, the third temperature of the battery pack is detected until the third temperature is higher than the third temperature threshold, and only charging is performed on the battery pack to make the second voltage of the battery pack reach the preset voltage threshold, wherein the third temperature threshold is determined based on the corresponding parameter table obtained by battery pack testing and big data calculation, the current power and the third temperature.

2. The charge temperature control method according to claim 1, characterized by, The application further comprises the following steps: If the first temperature is higher than the fourth temperature threshold, only charging is performed on the battery pack until the current fourth voltage of the battery pack reaches the preset voltage threshold.

3. The charge temperature control method according to claim 2, characterized by, The simultaneous charging and heating of the battery pack until the current first voltage of the battery pack reaches the preset voltage threshold specifically comprises the following steps: The battery pack is simultaneously charged and heated to obtain the fourth temperature of the battery pack; If the fourth temperature is higher than the fourth temperature threshold, only charging is performed on the battery pack until the current first voltage of the battery pack reaches the preset voltage threshold.

4. The charge temperature control method according to claim 3, characterized by, After the only charging of the battery pack when the fourth temperature is higher than the fourth temperature threshold, the following steps are further included: The fifth temperature of the battery pack is obtained, and the fifth temperature is compared with the fifth temperature threshold; if the fifth temperature is lower than the fifth temperature threshold, the battery pack is simultaneously charged and heated until the current sixth temperature of the battery pack is higher than the fifth temperature threshold.

5. The charge temperature control method according to claim 1, characterized by, After the only charging of the battery pack when the third temperature is higher than the third temperature threshold, the following steps are further included: The seventh temperature of the battery pack is obtained, and the seventh temperature is compared with the fifth temperature threshold; if the seventh temperature is lower than the fifth temperature threshold, the battery pack is simultaneously charged and heated until the current eighth temperature of the battery pack is higher than the fifth temperature threshold.

6. A charge temperature control device characterized by comprising: The application comprises the following steps: An obtaining module, a first processing module, a second processing module and a third processing module are included; The obtaining module is used to obtain the current first temperature of the battery pack when the vehicle accesses the charging device; The first processing module is configured to, if the first temperature is lower than a first temperature threshold, only heat the battery pack to obtain a second temperature of the battery pack, and compare the obtained heating power of the battery pack with a charging power, wherein the charging power is a power output by the charging device; and if the first temperature is higher than a second temperature threshold, simultaneously charge and heat the battery pack until a third voltage of the battery pack reaches a preset voltage threshold. The second processing module is configured to, if the heating power is lower than the charging power or the second temperature is higher than the second temperature threshold, simultaneously charge and heat the battery pack until a first voltage of the battery pack reaches the preset voltage threshold. The third processing module is configured to, if the heating power is higher than the charging power, determine whether to simultaneously discharge and heat the battery pack based on the second temperature, an obtained current power of the battery pack, and a battery characteristic curve; after entering the simultaneous discharging and heating, detect a third temperature of the battery pack until the third temperature is higher than a third temperature threshold, and only charge the battery pack to make a second voltage of the battery pack reach the preset voltage threshold, wherein the third temperature threshold is determined based on a corresponding parameter table obtained by battery pack testing and big data calculation, the current power, and the third temperature.

7. A vehicle characterized by comprising: The vehicle is configured to perform the charging temperature control method according to any one of claims 1-5.

8. A charging device, characterized by The charging device comprises a controller, the controller comprising a memory, a processor, and a computer program stored on the memory, and the computer program is executed by the processor to implement the charging temperature control method according to any one of claims 1-5.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the charging temperature control method according to any one of claims 1-5.

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