Battery heating control methods, devices and vehicles

Abstract

This invention provides a battery heating control method, device, and vehicle. The battery heating control method includes: when the vehicle is in a charging state, acquiring the battery temperature and battery SOC value; determining the battery heating mode based on the battery temperature and battery SOC value; wherein the battery heating mode includes battery pulse heating and / or PTC heating; and controlling the battery to heat according to the battery heating mode. The battery heating control method of this invention integrates and adjusts the battery heating mode by real-time monitoring of the battery temperature and battery SOC value, that is, adopting a suitable battery heating mode according to different conditions, improving battery heating efficiency, reducing battery heating energy consumption, solving the problems of low charging efficiency and high battery heating energy consumption at low temperatures, and improving battery charging efficiency under extreme low-temperature conditions.

Description

Technical Field

[0001] This invention relates to the field of vehicle battery technology, and in particular to a battery heating control method, device, and vehicle. Background Technology

[0002] When charging the power battery of a pure electric vehicle under extreme low-temperature conditions, the charging current will be small and the charging speed will be slow. At present, the industry's common method is to solve the problem caused by low-temperature charging by increasing the battery temperature.

[0003] Existing technology can use PTC (Positive Temperature Coefficient) heating to heat batteries under low-temperature conditions. The PTC heating element heats the coolant, which is then pumped through the battery cold plate to achieve the effect of heating the battery. However, the power required for PTC heating comes from the battery itself, meaning the battery needs to charge while simultaneously supplying power to the PTC, resulting in low charging efficiency and high energy consumption for battery heating. Summary of the Invention

[0004] In view of this, the present invention aims to provide a battery heating control method, device and vehicle to solve the problems of low charging efficiency and high energy consumption for battery heating in vehicles at low temperatures.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A battery heating control method, comprising:

[0007] When the vehicle is charging, obtain the battery temperature and battery SOC value;

[0008] The battery heating mode is determined based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating;

[0009] The battery is controlled to heat up according to the battery heating mode.

[0010] Furthermore, the battery heating mode is determined based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating, including:

[0011] If the battery temperature is less than or equal to the heating start temperature, and the battery SOC value is greater than or equal to the heating start SOC value, the battery heating mode is determined to be the battery pulse heating.

[0012] If the battery temperature is higher than the heating start temperature, the battery heating mode is determined to be PTC heating.

[0013] Furthermore, after determining the battery heating mode as battery pulse heating if the battery temperature is less than or equal to the heating start temperature and the battery SOC value is greater than or equal to the heating start SOC value, the process includes:

[0014] If the battery SOC value is less than the preset SOC threshold, the battery heating mode is determined to be PTC heating;

[0015] If the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is less than the preset temperature threshold, then the battery pulse heating continues.

[0016] If the battery SOC value is greater than or equal to a preset SOC threshold, and the battery temperature is greater than or equal to a preset temperature threshold, then the battery heating mode is exited.

[0017] Furthermore, after determining that the battery heating mode is PTC heating, the process includes:

[0018] If the battery temperature is lower than the preset temperature threshold, then the PTC heating continues;

[0019] If the battery temperature is greater than or equal to the preset temperature threshold, the battery heating mode is exited.

[0020] Furthermore, controlling the battery to heat according to the battery heating mode includes:

[0021] If the battery heating mode is battery pulse heating, a first control signal is sent to the motor controller to control the motor to output current waveform to pulse heat the battery.

[0022] Furthermore, controlling the battery to heat according to the battery heating mode includes:

[0023] If the battery heating mode is PTC heating, a second control signal is sent to the air conditioning controller to control the PTC heating coolant to flow through the battery cooling plate via a circulating water pump to heat the battery.

[0024] Another objective of this invention is to provide a battery heating control device to solve the problems of low charging efficiency and high energy consumption for battery heating in vehicles at low temperatures.

[0025] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0026] A battery heating control device, comprising:

[0027] The information acquisition module is used to acquire battery temperature and battery SOC value when the vehicle is charging.

[0028] The mode determination module is used to determine the battery heating mode based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating;

[0029] A heating control module is used to control the battery to heat up according to the battery heating mode.

[0030] Furthermore, the heating control module includes:

[0031] The first control heating submodule is used to send a first control signal to the motor controller if the battery heating mode is battery pulse heating, and control the motor to output current waveform to pulse heat the battery.

[0032] Furthermore, the heating control module includes:

[0033] The second control heating submodule is used to send a second control signal to the air conditioning controller if the battery heating mode is PTC heating, so as to control the PTC heating coolant to flow through the battery cold plate via a circulating water pump to heat the battery.

[0034] Compared with existing technologies, the battery heating control method of the present invention has the following advantages:

[0035] This invention acquires battery temperature and SOC value when the vehicle is charging, and determines the battery heating mode based on these values. The battery heating mode includes pulse heating and / or PTC heating. The battery is then controlled to heat according to the chosen heating mode. This embodiment of the invention integrates and adjusts the battery heating mode by real-time monitoring of battery temperature and SOC value. Specifically, it dynamically switches between suitable battery heating modes based on the actual battery condition during vehicle charging, fully utilizing resources and improving battery heating efficiency during charging. This, in turn, improves battery charging efficiency under extreme low-temperature conditions, reduces battery heating energy consumption, and enhances charging performance under low-temperature conditions.

[0036] To achieve the above objectives, this application also provides a vehicle, the vehicle including: the above-mentioned battery heating control device, to implement the above-mentioned battery heating control method.

[0037] The vehicle described above has the same advantages over the prior art as the method described above, and will not be repeated here. Attached Figure Description

[0038] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0039] Figure 1 A flowchart illustrating the steps of a battery heating control method provided in an embodiment of the present invention;

[0040] Figure 2 for Figure 1 The specific steps of the battery heating control method provided in the embodiments of the present invention are shown in the flowchart.

[0041] Figure 3 This is a schematic diagram of the structure of a battery heating control device provided in an embodiment of the present invention;

[0042] Figure 4 for Figure 3 A schematic diagram of the structure of the heating control module in a battery heating control device is provided. Detailed Implementation

[0043] It should be noted that, unless otherwise specified, the embodiments and features described in this invention can be combined with each other. To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0044] See Figure 1 , Figure 1 This is a flowchart of a battery heating control method provided in an embodiment of this application, such as... Figure 1 As shown, it includes the following steps:

[0045] Step 101: When the vehicle is charging, obtain the battery temperature and battery SOC value.

[0046] In this embodiment of the invention, when the vehicle controller detects that the vehicle is in a charging state, the battery management system (BMS) acquires the battery temperature and battery SOC value to monitor the battery status during the vehicle charging process.

[0047] Specifically, the Battery Management System (BMS) is used to accurately estimate the State of Charge (SOC) of the power battery, ensuring that the SOC is maintained within a reasonable range to prevent damage to the battery due to overcharging. It also dynamically monitors the operating status of the power battery, that is, during the battery charging process, it collects the battery temperature of each battery in the power battery in real time to prevent overcharging.

[0048] It should be noted that SOC (State of Charge) is the battery's state of charge, used to reflect the battery's remaining capacity. Numerically, it is defined as the ratio of remaining capacity to the battery's total capacity, ranging from 0% to 100%. When SOC = 0, it means the battery has zero remaining charge; when SOC = 100%, it means the battery is fully charged. The battery SOC is estimated by the battery management system based on parameters such as battery terminal voltage, charging / discharging current, and internal resistance.

[0049] Step 102: Determine the battery heating mode based on the battery temperature and battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating.

[0050] In this embodiment of the invention, the battery management system (BMS) determines the battery heating mode as battery pulse heating or PTC heating based on the battery temperature and battery SOC monitored in real time during the charging process, that is, based on the state of charge and charging operation status of the battery during the charging process, and adjusts the heating mode accordingly.

[0051] It should be noted that the lithium-ion power batteries of vehicles are relatively significantly affected by ambient temperature. In extreme low-temperature environments, the starting and charging of pure electric vehicles will also be affected. Specifically, the usable discharge capacity of lithium-ion power batteries, which are widely used in pure electric vehicles, drops sharply at around -10℃, only maintaining about 30% of that at room temperature. Furthermore, lithium batteries are prone to lithium plating when charged below 0℃, causing irreversible damage and safety issues, resulting in low charging efficiency in low-temperature environments. Therefore, it is necessary to heat the battery before charging. In other words, the battery management system determines the battery heating mode and heats the battery based on the battery temperature and the battery SOC value.

[0052] Specifically, based on the battery temperature and battery SOC value, the battery heating mode is determined. In this embodiment, step 102 heats the battery by confirming two battery heating modes: battery pulse heating and PTC heating.

[0053] One battery heating mode is battery pulse heating, which involves controlling the IGBT (Insulated Gate Bipolar Transistor) to periodically conduct through a circuit composed of the vehicle's power battery and the motor inverter to achieve periodic storage / discharge of the motor inductor. This allows the battery lithium ions to shuttle between the cathode and anode under the action of alternating current, and achieve self-heating due to the heat generated by the ohmic internal resistance and electrochemical reaction.

[0054] It should be noted that in a low-temperature charging environment, battery pulse heating can quickly heat the battery and increase its temperature. As the battery temperature increases, the battery's SOC gradually decreases. That is, during the battery pulse start-up process, the battery management system (BMS) determines whether the battery SOC has reached the preset threshold. If the battery temperature is higher than the heating start-up temperature and the battery SOC is lower than the heating start-up SOC value, then PTC heating can be used to reduce energy consumption.

[0055] Another battery heating mode is PTC heating. PTC (Positive Temperature Coefficient) is a constant resistance heating element. It uses PTC to heat the vehicle's coolant, which is then circulated through the battery cold plate by a water pump to heat the battery.

[0056] It should be noted that PTC heating coolant heats the battery, causing the battery temperature to rise rapidly. When the battery temperature reaches the preset temperature threshold, heating needs to be stopped to prevent overheating and damage to the battery.

[0057] Specifically, in this embodiment of the invention, when the vehicle controller detects that the vehicle is in a charging state, the battery management system (BMS) monitors the battery temperature and battery SOC. If the battery temperature is less than or equal to the heating start temperature and the battery SOC value is greater than or equal to the heating start SOC value, the battery heating mode is determined to be battery pulse heating; if the battery temperature is greater than the heating start temperature, the battery heating mode is determined to be positive temperature coefficient device (PTC) heating. The heating start temperature and heating start SOC value are determined based on the battery performance and are not specifically limited here.

[0058] Specifically, after determining the battery heating mode as pulse heating, battery heating is initiated. If the battery SOC value is less than the preset SOC threshold, the battery heating mode is switched to PTC heating. If the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is less than the preset temperature threshold, pulse heating continues. If the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is greater than or equal to the preset temperature threshold, the battery heating mode is exited.

[0059] Specifically, the battery heating mode is set to PTC heating. If the battery temperature is lower than the preset temperature threshold, PTC heating continues. If the battery temperature is greater than or equal to the preset temperature threshold, the battery heating mode is exited.

[0060] It should be noted that, in this embodiment of the invention, the specific process of battery pulse heating is as follows: the battery management system (BMS) is connected to the motor controller, the BMS sends a control signal to the motor controller, and after receiving the control signal, the motor controller enters the pulse heating mode to pulse heat the battery. The coolant that absorbs the heat from the motor system enters the cooling pipe of the power battery to heat the power battery.

[0061] It should be noted that, in this embodiment of the invention, the PTC heating process is as follows: the vehicle controller communicates with the battery management system (BMS) and the thermal management system via the CAN line. The BMS communicates with the PTC heater and controls the operation of the PTC heater. If the battery heating mode is PTC heating, a control signal is sent to the air conditioning controller to control the PTC heating coolant to flow through the battery cold plate via a circulating water pump to heat the battery.

[0062] In this embodiment of the invention, the battery heating mode is determined to be either pulse heating or PTC heating based on the battery temperature and the battery SOC value. The battery heating mode is switched according to the battery heating status to improve battery heating efficiency, make full use of resources, and reduce energy consumption during the battery heating process.

[0063] Step 103: Control the battery to heat up according to the battery heating mode.

[0064] In this embodiment of the invention, when the vehicle is charging, the Battery Management System (BMS) instructs the control unit corresponding to the determined battery heating mode, which includes battery pulse heating and PTC heating, to control the circuit to heat the battery.

[0065] Table 1: Comparison of Data on Heating Control Methods for Low-Temperature Rechargeable Batteries

[0066] Initial battery temperature (°C) -9.9℃ -9.8℃ Battery temperature rise rate (°C / min) 0.6℃ / min 1.8℃ / min Battery heating temperature (°C) 10.2℃ 10.1℃ Initial battery SOC (%) 29.8％ 29.7％ Final battery SOC (%) 80％ 80％ Charging time (min) 65min 46.3min Average charging power (kW) 45.4kw 66.3kw Charging grid power consumption (kWh) 49.2kw.h 51.2kw.h PTC heating power consumption (kWh) 5.42kw.h 2.3kw.h Battery charging capacity (kWh) 43.8kw.h 48.9kw.h

[0067] Referring to Table 1, which compares data on battery heating control methods under low-temperature charging conditions, the battery pulse heating mode and PTC heating mode control switching used in this embodiment of the invention achieve battery heating under low-temperature charging conditions, improving battery heating efficiency and further improving vehicle charging efficiency under low-temperature driving conditions. As shown in Table 1, the battery heating control method used in this application shortens the charging time by approximately 25 minutes, thus improving battery charging efficiency under extreme low-temperature conditions, reducing battery heating energy consumption, and enhancing charging performance under low-temperature conditions.

[0068] Specifically, when the vehicle controller detects that the vehicle is currently charging, the battery management system monitors the battery temperature and battery SOC. If the battery temperature is less than or equal to the heating start temperature and the battery SOC is greater than or equal to the heating start SOC, the battery pulse heating mode is used to heat the battery. As the battery temperature gradually rises, the battery SOC gradually decreases. When the battery temperature reaches the preset temperature threshold, the battery pulse heating is discontinued. If, during pulse heating, the battery SOC is detected to have dropped to the preset threshold but the battery temperature has not reached the preset temperature threshold, pulse heating is discontinued to prevent over-discharge of the battery, and the system switches to PTC heating of the battery, simultaneously starting battery charging, until the battery temperature reaches the preset temperature threshold, at which point the battery heating state is discontinued. If the battery temperature is greater than the heating start temperature, PTC heating of the battery is used, and charging is simultaneously started, until the battery temperature reaches the preset temperature threshold, at which point the battery heating state is discontinued.

[0069] This invention, in its embodiments, acquires battery temperature and battery SOC value when the vehicle is charging. Based on these values, it determines the battery heating mode, which includes pulse heating and / or PTC heating. The battery is then controlled to heat according to this mode. This invention integrates and adjusts the battery heating mode based on real-time monitoring of battery temperature and SOC value. Specifically, it dynamically switches between suitable heating modes according to the actual battery condition during charging, fully utilizing resources and improving battery heating efficiency during charging. This, in turn, improves battery charging efficiency under extreme low-temperature conditions, reduces battery heating energy consumption, and enhances charging performance under low-temperature conditions.

[0070] To enable those skilled in the art to more clearly understand the overall process of the battery heating control method disclosed in the above embodiments of the present invention, please refer to... Figure 2 , Figure 2 The flowchart of the battery heating control method disclosed in the embodiments of the present invention is shown, including:

[0071] S201, Vehicle charging.

[0072] Specifically, when the vehicle controller detects that the vehicle is in a charging state, it needs to determine whether to start battery heating based on the charging operation status and battery status in order to improve the battery charging efficiency under low temperature charging conditions. That is, after the vehicle controller detects that the vehicle is in a charging state, it sends a signal to the battery management system, and the battery management system (BMS) further obtains the battery temperature and battery SOC.

[0073] It should be noted that the Battery Management System (BMS) accurately estimates the battery's State of Charge (SOC) to ensure that the SOC is maintained within a reasonable range, preventing damage to the battery due to overcharging. It also dynamically monitors the operating status of the power battery, that is, during the battery charging process, it collects the battery temperature of each cell in the power battery in real time to prevent overcharging.

[0074] S202, the battery temperature is less than or equal to the heating start temperature, and the battery SOC is greater than or equal to the heating start SOC value.

[0075] Specifically, the Battery Management System (BMS) monitors the battery temperature and SOC of the power battery pack during vehicle charging. The heating start temperature and heating start SOC value are determined based on battery performance. In this embodiment of the invention, the heating start temperature can be 5°C and the heating start SOC can be 30%. That is, when the battery temperature is greater than or equal to 5°C and the battery SOC is greater than or equal to 30%, the battery is in a low-temperature charging state, and then proceeds to step 203; otherwise, proceeds to step 204.

[0076] Of course, the above heating start-up temperature and heating start-up SOC value are only examples of embodiments of the present invention. In actual use, S202 can also set the start-up temperature according to the vehicle's power battery, which will not be elaborated here.

[0077] It should be noted that SOC (State of Charge) is the battery's state of charge, used to reflect the battery's remaining capacity. Numerically, it is defined as the ratio of remaining capacity to the battery's total capacity, ranging from 0 to 100%. When SOC = 0, it indicates that the battery has no remaining charge; when SOC = 100%, it indicates that the battery is fully charged. The battery SOC is estimated by the battery management system based on parameters such as battery terminal voltage, charging / discharging current, and internal resistance.

[0078] S203, activate battery pulse heating.

[0079] Specifically, the battery management system (BMS) sends a first control signal to the motor controller to control the motor output current waveform to pulse heat the battery; the first control signal is used to instruct the motor controller to start the battery pulse heating circuit.

[0080] It should be noted that in a low-temperature charging environment, battery pulse heating can quickly heat the battery and increase its temperature. As the battery temperature increases, the battery's SOC gradually decreases. That is, during the process of starting the battery pulse, step 205 is entered, where the battery management system (BMS) determines whether the battery's SOC has reached the preset threshold.

[0081] S204, PTC heating is started.

[0082] Specifically, if the battery temperature is higher than the heating start temperature and the battery SOC is lower than the heating start SOC value, then PTC heating can be used to reduce energy consumption. That is, the battery management system (BMS) sends a second control signal to the air conditioning controller to control the PTC to heat the coolant, which then flows through the battery cold plate via a circulating water pump to heat the battery.

[0083] It should be noted that the PTC heating coolant heats the battery, causing the battery temperature to rise rapidly. When the battery temperature reaches the battery threshold, heating needs to be stopped to prevent overheating and damage to the battery. This is where step 208 begins, where the battery management system (BMS) monitors the battery temperature during the heating process.

[0084] S205, the battery SOC is greater than or equal to the preset SOC threshold.

[0085] Specifically, after starting the battery pulse heating, during the battery heating process, the Battery Management System (BMS) estimates the battery SOC and determines whether the battery SOC is greater than or equal to a preset SOC threshold. The preset SOC threshold is determined based on the battery charging protection, and the specific value is determined according to the battery performance and charging requirements, which is not limited here. In this embodiment of the invention, as the battery temperature gradually rises, the battery SOC gradually decreases. When the battery SOC is detected to drop to 10% during the battery pulse heating process, step 206 is entered to monitor whether the battery temperature has reached the preset temperature threshold; otherwise, step 204 is entered to start PTC heating.

[0086] S206, the battery temperature is greater than or equal to the preset temperature threshold.

[0087] Specifically, during the battery pulse heating process, the battery SOC value gradually decreases as the heating temperature rises. When the battery SOC is less than a preset SOC threshold, it is determined whether the battery temperature has been heated to the preset temperature threshold. The preset temperature threshold is determined based on the battery charging protection, and the specific value is determined according to the battery performance and charging requirements, which is not limited here. In this embodiment of the invention, when the battery temperature is detected to be greater than or equal to the preset temperature threshold, step 207 is entered, the battery heating is completed, and the battery heating is exited; otherwise, that is, the battery temperature has not reached the preset temperature threshold, step 203 is entered to continue the battery pulse heating.

[0088] S207, Battery heating off.

[0089] Specifically, under low-temperature charging conditions, the condition for determining whether battery heating is complete is the battery temperature. Once the battery is heated to a preset temperature threshold, battery heating is stopped, thereby heating the battery to its optimal performance, improving battery heating efficiency under low-temperature conditions, and thus improving battery charging efficiency.

[0090] S208, the battery temperature is greater than or equal to the preset temperature threshold.

[0091] Specifically, during the PTC heating process, it is determined whether the battery temperature has been heated to a preset temperature threshold. The preset temperature threshold is determined based on the battery charging protection, and the specific value is determined according to the battery performance and charging requirements, which is not limited here. In this embodiment of the invention, when the battery temperature is detected to be greater than or equal to the preset temperature threshold, step 209 is entered, the battery heating is completed, and the battery heating is exited; otherwise, that is, the battery temperature has not reached the preset temperature threshold, step 204 is entered to continue PTC heating.

[0092] S209, Battery heating off.

[0093] Specifically, under low-temperature charging conditions, the condition for determining whether battery heating is complete is the battery temperature. Once the battery is heated to a preset temperature threshold, battery heating is stopped, thereby heating the battery to its optimal performance, improving battery heating efficiency under low-temperature conditions, and thus improving battery charging efficiency.

[0094] In this embodiment of the invention, if the battery temperature is ≤5℃ and the battery SOC is ≥30%, the charging power of the battery will decrease significantly, and the charging time is expected to reach 15 hours, which far exceeds the requirements for slow charging at low temperatures. Therefore, the battery pulse heating function is used to heat the battery. As the battery temperature gradually rises, the battery SOC gradually decreases. When the battery temperature reaches 10℃, the battery pulse heating is deactivated. Under fast charging conditions, the charging power is significantly limited at 5℃. When the battery temperature reaches 10℃, the charging power is suitable, and the pulse heating function is deactivated. When the initial battery temperature is greater than 5℃, PTC heating is used. Considering that PTC heating efficiency is higher than pulse heating, PTC heating is sufficient. By using the above methods in combination, the charging time can be shortened by 10%, and the battery heating energy consumption can be reduced by about 5%.

[0095] In this embodiment of the invention, when the vehicle is charging, different battery heating modes, including battery pulse heating and / or PTC heating, are adopted according to the battery temperature and battery SOC value to control the battery heating. This embodiment of the invention integrates and adjusts the battery heating mode by real-time monitoring of the battery temperature and battery SOC value. That is, it adopts a suitable battery heating mode based on the actual condition of the battery during vehicle charging, dynamically switching the battery heating mode to fully utilize resources, improve battery heating efficiency during charging, thereby improving battery charging efficiency under extreme low-temperature conditions, reducing battery heating energy consumption, and enhancing charging performance under low-temperature conditions.

[0096] like Figure 3 As shown, based on the above-described battery heating control method, this embodiment of the invention also provides a battery heating control device, comprising:

[0097] The information acquisition module 301 is used to acquire the battery temperature and battery SOC value when the vehicle is in a charging state.

[0098] The mode determination module 302 is used to determine the battery heating mode based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating;

[0099] The heating control module 303 is used to control the battery to heat according to the battery heating mode.

[0100] In some embodiments, the mode determination module 302 is further configured to:

[0101] If the battery temperature is less than or equal to the heating start temperature, and the battery SOC value is greater than or equal to the heating start SOC value, the battery heating mode is determined to be battery pulse heating; if the battery temperature is greater than the heating start temperature, the battery heating mode is determined to be positive temperature coefficient device (PTC) heating.

[0102] In some embodiments, the mode determination module 302 is further configured to:

[0103] If the battery SOC value is less than the preset SOC threshold, the battery heating mode is set to PTC heating; if the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is less than the preset temperature threshold, the battery pulse heating continues; if the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is greater than or equal to the preset temperature threshold, the battery heating mode is exited.

[0104] In some embodiments, the mode determination module 302 is further configured to:

[0105] If the battery temperature is lower than the preset temperature threshold, PTC heating will continue; if the battery temperature is greater than or equal to the preset temperature threshold, the battery heating mode will be exited.

[0106] Specifically, such as Figure 4 As shown, in some embodiments, the heating control module 303 includes:

[0107] The first control heating submodule 401 is used to send a first control signal to the motor controller if the battery heating mode is battery pulse heating, and control the motor output current waveform to pulse heat the battery.

[0108] The second control heating submodule 402 is used to send a second control signal to the air conditioning controller if the battery heating mode is PTC heating, so as to control the PTC heating coolant to flow through the battery cold plate to heat the battery via a circulating water pump.

[0109] The battery heating control device provided in this embodiment of the invention, when the vehicle is in a charging state, acquires the battery temperature and battery SOC value through an information acquisition module; a mode determination module determines the battery heating mode based on the battery temperature and battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating; and a heating control module controls the battery to heat according to the battery heating mode. This embodiment of the invention integrates and adjusts the battery heating mode by real-time monitoring of the battery temperature and battery SOC value, that is, it adopts a suitable battery heating mode according to the actual condition of the battery during vehicle charging, dynamically switches the battery heating mode, makes full use of resources, improves battery heating efficiency during charging, thereby improving battery charging efficiency under extreme low-temperature conditions, reducing battery heating energy consumption, and improving charging effect under low-temperature conditions.

[0110] Based on the above-described battery heating control method, this embodiment of the invention also provides a vehicle, the vehicle including: the battery heating control device described in the above steps, used to execute the battery heating control method described in the above steps.

[0111] It is understood that the vehicle shown in this application can be any type of automobile, and the battery heating control method proposed in this application can be applied to these various types of automobiles to ensure battery heating control during driving, so as to optimize the vehicle's driving range.

[0112] It should be noted that the embodiments of the present invention are described with reference to the methods and apparatus according to embodiments of the present invention. It should be understood that each block of the flowchart and / or block diagram, and combinations of blocks in the flowchart and / or block diagram, can be implemented by computer program instructions of the vehicle system management system. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing terminal device to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal device, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0113] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal equipment, causing a series of operational steps to be performed on the computer or other programmable terminal equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable terminal equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0114] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the embodiments of the present invention.

[0115] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process or method that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process or method.

[0116] The embodiments of the present invention have been described above with reference to the accompanying drawings. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery heating control method, characterized by, The method includes: When the vehicle is charging, obtain the battery temperature and battery SOC value; The battery heating mode is determined based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating; According to the battery heating mode, the battery is controlled to heat up; The battery heating mode is determined based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating, including: If the battery temperature is less than or equal to the heating start temperature, and the battery SOC value is greater than or equal to the heating start SOC value, the battery heating mode is determined to be the battery pulse heating. If the battery temperature is higher than the heating start temperature, the battery heating mode is determined to be PTC heating; If the battery temperature is less than or equal to the heating start temperature, and the battery SOC value is greater than or equal to the heating start SOC value, after determining that the battery heating mode is the battery pulse heating mode, the process includes: If the battery SOC value is less than the preset SOC threshold, the battery heating mode is determined to be PTC heating; If the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is less than the preset temperature threshold, then the battery pulse heating continues. If the battery SOC value is greater than or equal to a preset SOC threshold, and the battery temperature is greater than or equal to a preset temperature threshold, then exit the battery heating mode. Battery pulse heating can quickly heat the battery, and as the battery temperature increases, the battery's SOC gradually decreases.

2. The method according to claim 1, characterized in that, After determining that the battery heating mode is PTC heating, the process includes: If the battery temperature is lower than the preset temperature threshold, then the PTC heating continues; If the battery temperature is greater than or equal to the preset temperature threshold, the battery heating mode is exited.

3. The method according to claim 1, characterized in that, The step of controlling the battery to heat up according to the battery heating mode includes: If the battery heating mode is battery pulse heating, a first control signal is sent to the motor controller to control the motor to output current waveform to pulse heat the battery.

4. The method according to claim 1, characterized in that, The step of controlling the battery to heat up according to the battery heating mode includes: If the battery heating mode is PTC heating, a second control signal is sent to the air conditioning controller to control the PTC heating coolant to flow through the battery cooling plate via a circulating water pump to heat the battery.

5. A battery heating control device, characterized in that, The device employing the battery heating control method as described in claim 1 includes: The information acquisition module is used to acquire battery temperature and battery SOC value when the vehicle is charging. The mode determination module is used to determine the battery heating mode based on the battery temperature and the battery SOC value, wherein the battery heating mode includes battery pulse heating and / or PTC heating; A heating control module is used to control the battery to heat according to the battery heating mode; The mode determination module is used to determine the battery heating mode as battery pulse heating if the battery temperature is less than or equal to the heating start temperature and the battery SOC value is greater than or equal to the heating start SOC value. If the battery temperature is higher than the heating start temperature, the battery heating mode is determined to be PTC heating; If the battery temperature is less than or equal to the heating start temperature, and the battery SOC value is greater than or equal to the heating start SOC value, after determining that the battery heating mode is the battery pulse heating mode, the process includes: If the battery SOC value is less than the preset SOC threshold, the battery heating mode is determined to be PTC heating; If the battery SOC value is greater than or equal to the preset SOC threshold and the battery temperature is less than the preset temperature threshold, then the battery pulse heating continues. If the battery SOC value is greater than or equal to a preset SOC threshold, and the battery temperature is greater than or equal to a preset temperature threshold, then exit the battery heating mode. Battery pulse heating can quickly heat the battery, and as the battery temperature increases, the battery's SOC gradually decreases.

6. The apparatus according to claim 5, characterized in that, The heating control module includes: The first control heating submodule is used to send a first control signal to the motor controller if the battery heating mode is battery pulse heating, and control the motor to output current waveform to pulse heat the battery.

7. The apparatus according to claim 6, characterized in that, The heating control module includes: The second control heating submodule is used to send a second control signal to the air conditioning controller if the battery heating mode is PTC heating, so as to control the PTC heating coolant to flow through the battery cold plate via a circulating water pump to heat the battery.

8. A vehicle, characterized in that, The vehicle includes a battery heating control device as described in any one of claims 5 to 7.

Images