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

Abstract

The invention discloses a charging temperature control method and device, a vehicle, charging equipment and a medium, and the method comprises the steps: obtaining the current first temperature of a battery pack when the vehicle is connected to the charging equipment; if the first temperature is lower than a first temperature threshold, heating the battery pack to obtain a second temperature of the battery pack, and comparing the obtained heating power of the battery pack 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 value, charging and heating the battery pack until the current first voltage of the battery pack reaches a preset voltage threshold value; and if the heating power is higher than the charging power, determining a third temperature threshold value based on the second temperature and the obtained current electric quantity of the battery pack, discharging and heating the battery pack until the third temperature of the battery pack is higher than the third temperature threshold value, and charging the battery pack to enable the second voltage of the battery pack to reach a preset voltage threshold value. The battery charging efficiency can be improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle charging, and in particular to a charging temperature control method, device, vehicle, charging equipment and medium. Background Art

[0002] In low temperature environment, the chemical reaction inside the battery becomes slow, so the battery cannot reach the appropriate temperature, so the battery cannot fully exert its due performance, which in turn affects the charging efficiency of the battery and may also cause damage to the battery. At the same time, in low temperature environment, due to the increase of internal resistance of the battery and the decrease of chemical reaction rate, even if the same charging power is provided, the actual charging speed of the battery will be affected, resulting in a decrease in charging efficiency.

[0003] In order to solve the problem of low charging efficiency in low temperature environments, a preheating strategy is adopted in related technologies. In low temperature environments, the current temperature of the battery pack is evaluated before charging, and then the battery pack is heated by discharging the vehicle battery pack to make the battery pack temperature reach an appropriate temperature. However, the discharge speed of the battery is slow at low temperatures, which results in a long preheating time, which increases the charging time and even affects the battery life. In order not to affect the battery life, some manufacturers provide the battery pack with an additional battery heating device to heat the battery pack, but this method increases the manufacturing cost of the vehicle and consumes more energy when working at low temperatures.

[0004] Application Contents

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

[0006] In a first aspect, the present application provides a charging temperature control method, comprising:

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

[0008] 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 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 a second temperature threshold, charging and heating the battery pack until the current first voltage of the battery pack reaches a 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 power of the battery pack obtained, and the battery pack is discharged and heated until the third temperature of the battery pack is higher than the third temperature threshold, and the battery pack is charged so that the second voltage of the battery pack reaches a preset voltage threshold.

[0011] The embodiment of the present application heats the battery pack when the first temperature is lower than the first temperature threshold, so that the battery can be raised from a low temperature state to a temperature at which it can be safely charged, thereby facilitating the subsequent rapid charging of the battery pack; by comparing the heating power of the obtained battery pack with the charging power, charging and heating or discharging and heating can be performed according to the comparison between the heating power and the charging power of the charging device at different temperatures, and then the battery can be quickly brought to a suitable temperature according to different strategies, thereby accelerating the battery charging efficiency; by charging and heating the battery pack, the battery can be started to be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery; by discharging and heating the battery pack, it can be ensured that the battery pack temperature quickly reaches the temperature threshold suitable for charging, thereby accelerating the charging efficiency. Compared with the prior art, the present application can enable the battery to quickly reach a suitable temperature, thereby improving the battery charging efficiency.

[0012] Furthermore, the charging temperature control method further 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 a preset voltage threshold.

[0014] In this way, by charging and heating the battery pack, the battery can be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery.

[0015] Furthermore, it also includes:

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

[0017] In this way, by charging the battery pack when the first temperature is higher than the fourth temperature threshold, that is, when the temperature reaches the most suitable temperature range for charging, the battery can be fully charged quickly.

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

[0019] charging and heating the battery pack 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 a preset voltage threshold.

[0021] In this way, by charging and heating the battery pack, the battery can be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery.

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

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

[0024] In this way, by charging and heating the battery pack when the fifth temperature of the battery pack is lower than the fifth temperature threshold, it can be ensured that the battery temperature is always maintained in the most suitable temperature range for charging, thereby quickly charging the battery.

[0025] Furthermore, before the second voltage of the battery pack reaches a preset voltage threshold, the method further includes:

[0026] 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 charged and heated until the eighth temperature obtained is higher than the fifth temperature threshold.

[0027] In this way, by charging and heating the battery pack when the seventh temperature of the battery pack is lower than the fifth temperature threshold, it can be ensured that the battery temperature is always maintained in the most suitable temperature range for charging, thereby quickly charging the battery.

[0028] In a second aspect, the present 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 device;

[0030] The first processing module is configured to heat the battery pack to obtain a second temperature of the battery pack if the first temperature is lower than a first temperature threshold, 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 configured to charge and heat the battery pack until the current first voltage of the battery pack reaches a preset voltage threshold if the heating power is lower than the charging power or the second temperature is higher than a second temperature threshold;

[0032] The third processing module is used to determine a third temperature threshold based on the second temperature and the acquired current power of the battery pack if the heating power is higher than the charging power, and 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] The embodiment of the present application heats the battery pack when the first temperature is lower than the first temperature threshold, so that the battery can be raised from a low temperature state to a temperature at which it can be safely charged, thereby facilitating the subsequent rapid charging of the battery pack; by comparing the heating power of the obtained battery pack with the charging power, charging and heating or discharging and heating can be performed according to the comparison between the heating power and the charging power of the charging device at different temperatures, and then the battery can be quickly brought to a suitable temperature according to different strategies, thereby accelerating the battery charging efficiency; by charging and heating the battery pack, the battery can be started to be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery; by discharging and heating the battery pack, it can be ensured that the battery pack temperature quickly reaches the temperature threshold suitable for charging, thereby accelerating the charging efficiency. Compared with the prior art, the present application can enable the battery to quickly reach a suitable temperature, thereby accelerating the battery charging efficiency.

[0034] In a third aspect, the present application provides a vehicle, which is configured to execute the charging temperature control method as described in the present application.

[0035] In a fourth aspect, the present application provides a charging device, which includes a controller, the controller includes a memory, a processor and a computer program stored on the memory, and when the computer program is executed by the processor, the charging temperature control method described in the present application is implemented.

[0036] In a fifth aspect, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the charging temperature control method as described in the present application is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a flow chart of an embodiment of the charging temperature control method provided by the present application;

[0038] Figure 2It is a schematic diagram of the judgment relationship between different temperature thresholds and corresponding action instructions provided by this application;

[0039] Figure 3 It is a structural schematic diagram of an embodiment of the charging temperature control device provided in the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] It should be understood that the step numbers used in this article are only for the convenience of description and are not intended to limit the order in which the steps are executed.

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

[0043] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0044] The term "and / or" means and includes any and all possible combinations of one or more of the associated listed items.

[0045] In low temperature environments, the chemical reaction inside the battery becomes slow, making it impossible for the battery to reach a suitable temperature, so that the battery cannot fully exert its due performance. Because the internal reaction of the battery is slow, the temperature does not meet the standard, and the internal resistance increases, even if the charging power is the same, the actual charging speed will be affected. To solve this problem, some technologies use a preheating strategy to evaluate the battery temperature and discharge and heat it, but the discharge is slow at low temperatures and the preheating time is long, which will increase the charging time. Some manufacturers also use additional heating devices, which are effective but increase the manufacturing cost and consume a lot of energy when working in low temperature environments.

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

[0047] A charging temperature control method, device, vehicle, charging equipment and medium provided in the embodiments of the present application are specifically illustrated through the following embodiments. First, the charging temperature control method in the embodiments of the present application is described.

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

[0049] The present application can also be used in numerous general or special computer system environments or configurations. For example: personal computers, server computers, handheld or portable devices, tablet devices, multiprocessor systems, microprocessor-based systems, set-top boxes, programmable consumer electronics, network PCs, minicomputers, mainframe computers, distributed computing environments including any of the above systems or devices, etc. The present 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. The present application can also be practiced in distributed computing environments, in which tasks are performed by remote processing devices connected through a communication network. In a distributed computing environment, program modules can be located in local and remote computer storage media including storage devices.

[0050] Embodiment 1

[0051] Please refer to Figure 1 , Figure 1 is a flow chart of an embodiment of the charging temperature control method provided by the present application, including steps S101 to S104;

[0052] S101, when the vehicle is connected to the charging device, obtaining 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 will initialize and check 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 beginning of the charging process.

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

[0055] In some embodiments, after the first temperature is obtained, the first temperature needs to be compared with different temperature thresholds to execute corresponding action instructions based on the comparison results, wherein the action instructions include: heating only, charging and heating at the same time, and charging only and discharging and heating at the same time.

[0056] In some embodiments, when the first temperature is obtained, it is necessary to compare the first temperature with the first temperature threshold. If the first temperature is lower than the first temperature threshold, the heating relay may be controlled to close or the heating element may be controlled to heat the battery pack, but it is not limited to that the temperature of the battery pack is monitored in real time until the temperature of the battery pack is raised from a low temperature state to a second temperature that can be safely charged. This process is a heating-only process. In the heating-only process, it is also necessary to detect the type of the current charging device, obtain the maximum output power of the current charging device, that is, the charging power, and obtain the heating power of the current battery pack. The heating power is compared with the charging power to determine how to charge the battery pack in the future based on the comparison result.

[0057] It should be noted that in the heating-only process, the charging power of the charging equipment 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 exited and other processes have been entered.

[0058] In some embodiments, the method further includes: 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 a preset voltage threshold. Specifically, when the first temperature is obtained, the first temperature needs to be compared with the second temperature threshold. If the first temperature is higher than the second temperature threshold, it means that the temperature of the battery pack can be safely charged. In this case, the BMS will send a signal to the charging system to instruct it to charge the battery pack. At the same time, since the low ambient temperature will affect the first temperature of the battery pack, and the first temperature still needs to be maintained or increased to the most suitable temperature range for charging, the BMS will also send a signal to the thermal management system to instruct it to perform necessary heating on the battery pack. This process is also a simultaneous charging and heating process. During the simultaneous charging and heating process, it is also necessary to monitor the third voltage of the battery pack in real time until the third voltage reaches the preset voltage threshold, that is, the battery is fully charged, then the charging is terminated to remind the user to disconnect from the charging device.

[0059] In some embodiments, the battery pack may be charged and heated simultaneously by closing the heating relay and the main relay at the same time.

[0060] It should be noted that during the simultaneous charging and heating process, the charging power of the charging equipment is used for 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 means that it belongs to this process.

[0061] In this way, by charging and heating the battery pack, the battery can be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery.

[0062] In some embodiments, the method further includes: if the first temperature is higher than a fourth temperature threshold, 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 is necessary to compare the first temperature with the fourth temperature threshold. If the first temperature is higher than the fourth temperature threshold, it means that the temperature of the battery pack has reached the most suitable temperature range for charging. In this case, the BMS will send a signal to the charging system to instruct it to charge the battery pack directly. This process is also the charging process only. It should be noted that instructing it to charge the battery pack directly is to charge the battery pack by closing the main relay, wherein the most suitable temperature range for charging is higher than the fifth temperature threshold and lower than the fourth temperature threshold.

[0063] In this way, by charging the battery pack when the first temperature is higher than the fourth temperature threshold, that is, when the temperature reaches the most suitable temperature range for charging, the battery can be fully charged quickly.

[0064] It should be noted that the first temperature threshold, the second temperature threshold, the subsequent third temperature threshold, the fourth temperature threshold and the subsequent fifth temperature threshold can all be understood as nouns and can be set according to the battery status. The schematic diagram of the judgment relationship between different temperature thresholds and corresponding action instructions is as follows: Figure 2 As shown, the first temperature threshold is used to determine whether to enter the heating-only stage, the second temperature threshold is used to determine whether to enter the simultaneous charging and heating stage, the third temperature threshold is used to determine whether to enter the simultaneous discharging and heating stage, the fourth temperature threshold is used to determine whether to enter the charging-only stage, and the fifth temperature threshold is used to determine whether to return to the simultaneous charging and heating stage during the charging stage. Among them, the first temperature threshold < the second temperature threshold < the fifth temperature threshold < the fourth temperature threshold, the first temperature threshold < the third temperature threshold < the fifth temperature threshold < the fourth temperature threshold, and the second temperature threshold and the fourth temperature threshold cannot be compared in size.

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

[0066] In some embodiments, when the heating power is lower than the charging power, it indicates that the process is a simultaneous charging and heating process. Since the battery is heated in the heating-only stage, when the battery temperature, i.e., the second temperature, is higher than the second temperature threshold, it also indicates that the temperature has reached a safe charging temperature, but the temperature range most suitable for charging has not yet been reached, so the battery needs to be charged and heated at the same time.

[0067] In some embodiments, the charging and heating of 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, charging the battery pack until the current first voltage of the battery pack reaches the preset voltage threshold. Specifically, during the charging and heating stage of the battery pack, the BMS will send a signal 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, it is necessary to detect the current fourth temperature of the battery pack and compare the fourth temperature with the fourth temperature threshold. If the fourth temperature is higher than the fourth temperature threshold, it means that the temperature of the battery pack has reached the most suitable temperature for charging, then the main heating relay is disconnected to enter the charging-only stage. In the charging-only stage, it is necessary to monitor the current first voltage of the battery pack in real time until the first voltage reaches the preset voltage threshold, that is, the battery is fully charged, then the charging is terminated to remind the user to disconnect from the charging device. If the fourth temperature is lower than the fourth temperature threshold, the battery pack continues to be charged and heated.

[0068] In this way, by charging and heating the battery pack, the battery can be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery.

[0069] In some embodiments, before the current first voltage of the battery pack reaches the preset voltage threshold, it also includes: obtaining the fifth temperature of the battery pack, and comparing the fifth temperature 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 obtained is higher than the fifth temperature threshold. Specifically, when charging in the charging-only stage, it is necessary to monitor the current fifth temperature of the battery pack in real time, and compare the fifth temperature with the fifth temperature threshold. If the fifth temperature is lower than the fifth temperature threshold, it means that it is not within the most suitable temperature range for charging, so it is necessary to charge and heat the battery pack at the same time until the current sixth temperature of the battery pack is higher than the fifth temperature threshold, that is, it returns to the most suitable temperature range for charging.

[0070] In this way, by charging and heating the battery pack when the fifth temperature of the battery pack is lower than the fifth temperature threshold, it can be ensured that the battery temperature is always maintained in the most suitable temperature range for charging, thereby quickly charging the battery.

[0071] S104, 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 obtained, and the battery pack is discharged and heated until the third temperature of the battery pack is higher than the third temperature threshold, and 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 power of the battery pack, and then combine the battery characteristic curve to determine whether to enter the simultaneous discharge and heating stage and determine the third temperature threshold. In the simultaneous discharge and heating stage, the charging device and the battery pack provide power for battery heating at the same time, and the battery pack sacrifices a part of the battery power to heat the battery pack. During the charging and heat release process, it is necessary to continuously monitor the current third temperature of the battery pack and determine whether the current third temperature of the battery pack is higher than the third temperature threshold. If the third temperature is higher than the third temperature threshold, it means that the charging and heat release process has been jumped out and the charging-only stage has been entered. Then, the main heating circuit is disconnected to enter the charging-only stage. In the charging-only stage, it is necessary to monitor the current second voltage of the battery pack in real time until the second voltage reaches the preset voltage threshold, that is, the battery is fully charged, then the charging is terminated to remind the user to disconnect from the charging device.

[0073] It should be noted that, during the simultaneous charging and heat release process, part of the battery power needs to be sacrificed to heat the battery pack so that the battery pack can quickly reach the most suitable charging temperature. At this time, the heating power = charging power of the charging device + battery discharge power.

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

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

[0076] In some embodiments, before the second voltage of the battery pack reaches the preset voltage threshold, it also includes: obtaining the seventh temperature of the battery pack, and comparing the seventh temperature 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 obtained is higher than the fifth temperature threshold. Specifically, when charging in the charging-only stage, it is necessary to monitor the current seventh temperature of the battery pack in real time, and compare the seventh temperature with the fifth temperature threshold. If the seventh temperature is lower than the fifth temperature threshold, it means that it is not within the most suitable temperature range for charging, so it is necessary to close the heating relay to charge and heat the battery pack at the same time, until the current eighth temperature of the battery pack is higher than the fifth temperature threshold, that is, it returns to the most suitable temperature range for charging.

[0077] In this way, by charging and heating the battery pack when the seventh temperature of the battery pack is lower than the fifth temperature threshold, it can be ensured that the battery temperature is always maintained in the most suitable temperature range for charging, thereby quickly charging the battery.

[0078] The embodiment of the present application heats the battery pack when the first temperature is lower than the first temperature threshold, so that the battery can be raised from a low temperature state to a temperature at which it can be safely charged, thereby facilitating the subsequent rapid charging of the battery pack; by comparing the heating power of the obtained battery pack with the charging power, charging and heating or discharging and heating can be performed according to the comparison between the heating power and the charging power of the charging device at different temperatures, and then the battery can be quickly brought to a suitable temperature according to different strategies, thereby accelerating the battery charging efficiency; by charging and heating the battery pack, the battery can be started to be charged while maintaining the battery temperature, and the battery temperature can be continuously increased to reach the most suitable temperature range for charging, thereby quickly filling the battery; by discharging and heating the battery pack, it can be ensured that the battery pack temperature quickly reaches the temperature threshold suitable for charging, thereby accelerating the charging efficiency. Compared with the prior art, the present application can enable the battery to quickly reach a suitable temperature, thereby improving the battery charging efficiency.

[0079] Embodiment 2

[0080] Please refer to Figure 3 , Figure 3 It is a structural schematic diagram of an embodiment of the charging temperature control device provided in the present application, comprising: 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 device;

[0082] The first processing module 200 is configured to heat the battery pack to obtain a second temperature of the battery pack if the first temperature is lower than a first temperature threshold, 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;

[0083] The second processing module 300 is configured to charge and heat the battery pack if the heating power is lower than the charging power or the second temperature is higher than a 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 acquired current power of the battery pack if the heating power is higher than the charging power, and 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, execution process, etc. 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 specific contents, please refer to the description in Embodiment 1 of the method of the present invention, and will not be repeated here.

[0086] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separated, i.e., may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the method of this embodiment.

[0087] The present invention also provides a vehicle, which is configured to execute the charging temperature control method as described in the first embodiment.

[0088] The present invention also provides a charging device, which includes a controller, and the controller includes a memory, a processor, and a computer program stored in the memory. When the computer program is executed by the processor, the charging temperature control method as described in Example 1 is implemented.

[0089] The present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the charging temperature control method as described in the first embodiment is implemented.

[0090] A person skilled in the art can understand that all or part of the processes in the above-mentioned embodiments can be implemented by instructing the relevant hardware through a computer program, and the program can be stored in a computer-monitorable storage medium, and when the program is executed, it can include the processes of the embodiments of the above-mentioned methods. The storage medium can be a disk, an optical disk, a read-only memory (ROM) or a random access memory (RAM), etc.

[0091] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present application in detail. It should be understood that the above description is only a specific embodiment of the present application and is not intended to limit the scope of protection of the present application.

[0092] It is particularly pointed out that for those skilled in the art, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the protection scope of this application.

Claims

1. A charging temperature control method, characterized in that: include: When the vehicle is connected to the charging device, the current first temperature of the 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 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; If the heating power is lower than the charging power or the second temperature is higher than a second temperature threshold, charging and heating the battery pack until the current 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 obtained, and the battery pack is discharged and heated until the third temperature of the battery pack is higher than the third temperature threshold, and the battery pack is charged so that the second voltage of the battery pack reaches a preset voltage threshold.

2. The charging temperature control method according to claim 1, characterized in that: Also includes: 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 a preset voltage threshold.

3. The charging temperature control method according to claim 1, characterized in that: Also includes: If the first temperature is higher than a fourth temperature threshold, the battery pack is charged until a current fourth voltage of the battery pack reaches a preset voltage threshold.

4. The charging temperature control method according to claim 3, characterized in that: The charging and heating of the battery pack is performed until the current first voltage of the battery pack reaches a preset voltage threshold, specifically: 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, the battery pack is charged until the current first voltage of the battery pack reaches a preset voltage threshold.

5. The charging temperature control method according to claim 4, characterized in that: Before the first voltage of the battery pack reaches the preset voltage threshold, the method further includes: A fifth temperature of the battery pack is obtained, and the fifth temperature is compared with a fifth temperature threshold. If the fifth temperature is lower than the fifth temperature threshold, the battery pack is charged and heated until a sixth temperature is higher than the fifth temperature threshold.

6. The charging temperature control method according to claim 1, characterized in that: Before the second voltage of the battery pack reaches a preset voltage threshold, the method further includes: 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 charged and heated until the eighth temperature obtained is higher than the fifth temperature threshold.

7. A charging temperature control device, characterized in that: include: An acquisition module, a first processing module, a second processing module and a third processing module; The acquisition module is used to acquire the current first temperature of the battery pack when the vehicle is connected to the charging device; The first processing module is configured to heat the battery pack to obtain a second temperature of the battery pack if the first temperature is lower than a first temperature threshold, 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; The second processing module is configured to charge and heat the battery pack until the current first voltage of the battery pack reaches a preset voltage threshold if the heating power is lower than the charging power or the second temperature is higher than a second temperature threshold; The third processing module is used to determine a third temperature threshold based on the second temperature and the acquired current power of the battery pack if the heating power is higher than the charging power, and 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.

8. A vehicle, characterized in that: The vehicle is configured to execute the charging temperature control method according to any one of claims 1 to 6.

9. A charging device, characterized in that: The charging device includes a controller, which includes a memory, a processor, and a computer program stored in the memory. When the computer program is executed by the processor, the charging temperature control method according to any one of claims 1 to 6 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the charging temperature control method according to any one of claims 1 to 6 is implemented.

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