A power battery charging control method, device, system, and automobile

Abstract

This invention provides a power battery charging control method, device, system, and vehicle. The method includes: when a charging pile and a vehicle are configured for charging, obtaining the maximum charging current value of the charging pile; when the maximum charging current value is greater than or equal to a preset current threshold, obtaining charging parameters; and controlling the charging of the power battery according to the charging parameters. The solution of this invention can enable the battery to achieve optimal charging performance, improve charging efficiency, shorten charging time, reduce waiting time for charging vehicles, and without affecting battery life.

Description

Technical Field

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

[0002] Electric vehicles are developing rapidly, and power batteries are the core components of electric vehicles. In recent years, with the continuous increase in research and development efforts, battery performance has been continuously improved, and the charging rate has also been significantly improved. Mainstream batteries have developed power batteries with a charging rate of 3C and above, and the charging capacity can reach 80% in 10 to 20 minutes.

[0003] Different charging ambient temperatures, charging pile power, current battery level, and other factors can affect the efficiency of high-power charging. Increasing battery temperature can increase the charging rate, but excessively high temperatures can lead to battery thermal runaway and shorten its lifespan. Summary of the Invention

[0004] This invention provides a battery charging control method, device, system, and vehicle to maximize battery capacity, shorten charging time, optimize charging resources, and solve users' charging anxiety.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A power battery charging control method, comprising:

[0007] When configuring the charging pile and the vehicle for charging, obtain the maximum charging current value of the charging pile;

[0008] When the maximum charging current value is greater than or equal to a preset current threshold, the charging parameters are obtained;

[0009] The charging of the power battery is controlled according to the charging parameters.

[0010] Optionally, the charging parameters include at least one of the following:

[0011] Ambient temperature;

[0012] Battery level;

[0013] Battery temperature.

[0014] Optionally, the charging control of the power battery according to the charging parameters includes:

[0015] When the ambient temperature is less than or equal to a first preset temperature threshold, the power battery is determined to be charged at high power based on the battery charge and battery temperature, and the charging rate of the high power charging is greater than a preset value.

[0016] When the ambient temperature exceeds the first preset temperature threshold, high-power charging of the power battery will be stopped.

[0017] Optionally, based on battery charge and battery temperature, high-power charging control of the power battery can be implemented, including:

[0018] Get the current battery level and current battery temperature;

[0019] When the current battery charge is greater than or equal to a first charge threshold and less than or equal to a second charge threshold, and the current battery temperature is less than or equal to a second preset temperature threshold, the power battery is charged at high power.

[0020] Wherein, the first power threshold is less than or equal to the second power threshold.

[0021] Optionally, high-power charging control of the power battery based on battery charge and battery temperature also includes:

[0022] When the current battery charge is less than the first charge threshold and / or the current battery charge is greater than the second charge threshold, high-power charging of the power battery is stopped; when the current battery temperature is greater than the second preset temperature threshold, high-power charging of the power battery is stopped.

[0023] Optionally, the high-power charging process for the power battery may also include:

[0024] Obtain the real-time battery temperature during the high-power charging process of the power battery.

[0025] If the current battery charge is greater than the third charge threshold and the real-time battery temperature is greater than the first preset temperature threshold, then high-power charging of the power battery will be stopped. The third charge threshold is greater than the second charge threshold.

[0026] Optionally, the high-power charging process for the power battery may also include:

[0027] The power battery is heated or cooled to keep the battery temperature within a preset temperature range.

[0028] This invention provides a power battery charging control device, comprising:

[0029] The first acquisition module is used to acquire the maximum charging current value of the charging pile when the charging pile and the vehicle are configured for charging.

[0030] The second acquisition module is used to acquire charging parameters when the maximum charging current value is greater than or equal to a preset current threshold.

[0031] The control module is used to control the charging of the power battery according to the charging parameters.

[0032] The present invention also provides a battery management system, including the power battery charging control device described above.

[0033] The present invention also provides an automobile including the battery management system described above.

[0034] The above-described solution of the present invention has at least the following beneficial effects:

[0035] The above-mentioned solution of the present invention includes: obtaining the maximum charging current value of the charging pile when the charging pile and the vehicle are configured for charging; obtaining charging parameters when the maximum charging current value is greater than or equal to a preset current threshold; and controlling the charging of the power battery according to the charging parameters. The solution of the present invention can enable the battery to achieve optimal charging performance, improve charging efficiency, shorten charging time, reduce the waiting time for charging vehicles, and without affecting battery life. Attached Figure Description

[0036] Figure 1 This is a flowchart of a power battery charging control method provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic flowchart of a power battery charging control method according to a specific example of the present invention.

[0038] Figure 3 This is a detailed flowchart of the power battery charging control method of the present invention;

[0039] Figure 4 This is a schematic diagram of the operation of a vehicle controller provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram illustrating the relationship between charging parameters and charging strategies provided in an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of a power battery charging control device provided in an embodiment of the present invention. Detailed Implementation

[0042] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0043] like Figure 1As shown, an embodiment of the present invention proposes a power battery charging control method, including:

[0044] Step 11: When configuring the charging pile and the vehicle for charging, obtain the maximum charging current value of the charging pile.

[0045] Step 12: When the maximum charging current value is greater than or equal to a preset current threshold, obtain the charging parameters;

[0046] Step 13: Control the charging of the power battery according to the charging parameters.

[0047] In this embodiment, the maximum charging current value of the charging pile is obtained when the charging pile and the vehicle are configured for charging; when the maximum charging current value is greater than a preset current threshold, charging parameters are obtained; and the charging of the power battery is controlled according to the charging parameters. This allows the battery to achieve optimal charging performance, improves charging efficiency, shortens charging time, reduces waiting time for the vehicle to charge, and does not affect battery life.

[0048] In an optional embodiment of the present invention, step 11 includes:

[0049] When the charging pile is configured to charge the vehicle, the maximum charging current of the charging pile is determined according to the charging message CML in GB27930 standard. When the current is ≥XA, the power battery charging control method is activated.

[0050] This current is used to determine whether a charging station is a high-power charging station. High-power charging stations can utilize the performance of batteries with a capacity of 3C or higher. The reference value for X is approximately 400A~600A.

[0051] In an optional embodiment of the present invention, step 12 involves obtaining charging parameters, wherein the charging parameters include at least one of the following:

[0052] Ambient temperature;

[0053] Battery level;

[0054] Battery temperature.

[0055] In an optional embodiment of the present invention, step 13 may include:

[0056] Step 131, controlling the charging of the power battery according to the charging parameters, including:

[0057] Step 1311: When the ambient temperature is less than or equal to the first preset temperature threshold, determine to charge the power battery at high power based on the battery charge and battery temperature.

[0058] Step 1312: When the ambient temperature is greater than the first preset temperature threshold, stop charging the power battery at high power.

[0059] In practice, when the ambient temperature is ≤ Y ℃, the power battery charging control method is activated after charging is started.

[0060] By using ambient temperature as a reference, when the ambient temperature is high, based on the battery characteristics, high-power charging of the battery can be directly achieved, avoiding overheating that could affect battery life. This method is initiated at a reasonable temperature. The reference value for Y is approximately 20℃.

[0061] Step 132, according to the charging control strategy, performs high-power charging control on the power battery, including:

[0062] Step 1321: Obtain the current battery level and current battery temperature;

[0063] Step 1322: When the current battery charge is greater than or equal to the first charge threshold and less than or equal to the second charge threshold, and the current battery temperature is less than or equal to the second preset temperature threshold, the power battery is charged at high power.

[0064] Wherein, the first power threshold is less than or equal to the second power threshold.

[0065] In practice, when the battery charge A ≤ SOC ≤ B, the power battery charging control method is activated.

[0066] The starting point of SOC is used to determine the state. In non-extremely cold temperatures, based on battery characteristics, at low SOC levels, battery temperature has a relatively small impact on the charging rate, allowing for high-power charging. Here, A is less than or equal to B, with a reference value for A of approximately 25% and a reference value for B of approximately 40%.

[0067] Step 133, according to the charging control strategy, performs high-power charging control on the power battery, further including:

[0068] Step 1331: When the current battery power is less than the first power threshold and / or the current battery power is greater than the second power threshold, stop charging the power battery at high power.

[0069] Step 1332: When the current battery temperature is greater than the second preset temperature threshold, stop charging the power battery at high power.

[0070] In practice, the current battery temperature is obtained. When the current battery temperature is ≤ C℃, the power battery charging control method is activated to perform high-power charging.

[0071] When the current battery temperature exceeds C℃, the power battery charging control method will be deactivated to avoid overheating. The reference value for C is approximately 35℃.

[0072] In an optional embodiment of the present invention, step 134 includes:

[0073] Step 1341: Obtain the real-time battery temperature during the high-power charging process of the power battery.

[0074] Step 1342: If the current battery charge is greater than the third charge threshold and the real-time battery temperature is greater than the first preset temperature threshold, stop high-power charging of the power battery. The third charge threshold is greater than the second charge threshold.

[0075] In practice, during the charging process, when the SOC of the battery is greater than D% and the battery temperature is greater than or equal to E℃, high-power charging is not performed in the high SOC and high temperature ranges of the battery, and the power battery charging control method is terminated.

[0076] Among them, the reference value for D is approximately 80%, and the reference value for E is approximately 42℃.

[0077] In an optional embodiment of the present invention, the process of high-power charging of the power battery further includes:

[0078] The power battery is heated or cooled to keep the battery temperature within a preset temperature range.

[0079] After the power battery charging control method is activated, during high-power charging, if the battery management system (BMS) detects that the battery temperature is higher or lower than the preset range, the BMS sends a command to the thermal management system to heat or cool the battery, keeping it at F~G℃. Within this temperature range, the battery charging rate is optimal and does not affect the battery life.

[0080] The reference value for F is approximately 42℃, and the reference value for G is approximately 45℃.

[0081] like Figure 2 and Figure 3 The diagram shows the specific implementation flow of the above method, including:

[0082] Step 21: When configuring the charging pile and the vehicle for charging, the maximum charging current of the charging pile is determined according to the charging message CML in GB27930 standard. When the current is ≥XA, the power battery charging control method is activated.

[0083] This current is used to determine whether a charging station is a high-power charging station. High-power charging stations can utilize the performance of batteries with a capacity of 3C or higher. The reference value for X is approximately 400A~600A.

[0084] Step 22: When the ambient temperature is ≤ Y ℃, start charging and activate the power battery charging control method.

[0085] By using ambient temperature as a reference, when the ambient temperature is high, based on the battery characteristics, high-power charging of the battery can be directly achieved, avoiding overheating that could affect battery life. This method is initiated at a reasonable temperature. The reference value for Y is approximately 20℃.

[0086] Step 23: When the battery charge A ≤ SOC ≤ B %, activate the power battery charging control method.

[0087] The battery's state is determined by the starting point of its State of Charge (SOC). In non-extremely cold temperatures, based on battery characteristics, the battery temperature has a relatively small impact on the charging rate at low SOC levels, allowing for high-power charging. The reference value for A is approximately 25%, and the reference value for B is approximately 40%.

[0088] Step 24: If the current battery temperature is ≤C ℃, activate the power battery charging control method.

[0089] To avoid overheating, determine whether to discontinue this charging method. The reference value for temperature C is approximately 35°C.

[0090] Step 25: During the charging process, when the SOC of the battery is greater than D%, and the battery temperature is greater than or equal to E℃, the power battery charging control method is stopped.

[0091] During charging, high-power charging is not performed in the high SOC and high-temperature ranges of the battery, based on the battery characteristics, and the power battery charging control method is terminated. The reference value for D is approximately 80%, and the reference value for E is approximately 42℃.

[0092] After the power battery charging control method is activated, the thermal management system heats and cools the battery to keep it at F~G℃. Within this temperature range, the battery charging rate is optimal and does not affect the battery life.

[0093] The reference value for F is approximately 42℃, and the reference value for G is approximately 45℃.

[0094] like Figure 4 As shown, the maximum current of the charging pile and the charging parameters of the power battery are obtained through the vehicle controller, and the air conditioning system is controlled by the air conditioning controller to heat or cool the power battery.

[0095] like Figure 5 As shown, based on the maximum current of the charging pile and the charging parameters of the power battery, the system determines whether to activate the power battery charging control method to perform high-power charging according to the charging strategy.

[0096] like Figure 6 As shown, this embodiment of the invention also provides a power battery charging control device 60, comprising:

[0097] The first acquisition module 61 is used to acquire the maximum charging current value of the charging pile when the charging pile and the vehicle are configured for charging.

[0098] The second acquisition module 62 is used to acquire charging parameters when the maximum charging current value is greater than or equal to a preset current threshold.

[0099] The control module 63 is used to control the charging of the power battery according to the charging parameters.

[0100] Optionally, the second acquisition module 62 includes:

[0101] The first acquisition submodule is used to acquire charging parameters, wherein the charging parameters include at least one of the following:

[0102] Ambient temperature; battery charge; battery temperature.

[0103] Optionally, the control module 63 includes:

[0104] The first control submodule is used to control the charging of the power battery according to the charging parameters, including:

[0105] When the ambient temperature is less than or equal to a first preset temperature threshold, the power battery is determined to be charged at high power based on the battery charge and battery temperature, and the charging rate of the high power charging is greater than a preset value.

[0106] When the ambient temperature exceeds the first preset temperature threshold, high-power charging of the power battery will be stopped.

[0107] Optionally, the second acquisition module 62 further includes:

[0108] The second acquisition submodule is used to acquire the current battery level and current battery temperature.

[0109] Optionally, the control module 63 includes:

[0110] The second control submodule is used to perform high-power charging control of the power battery based on the battery charge and battery temperature, including:

[0111] When the current battery charge is greater than or equal to a first charge threshold and less than or equal to a second charge threshold, and the current battery temperature is less than or equal to a second preset temperature threshold, the power battery is charged at high power.

[0112] Wherein, the first power threshold is less than or equal to the second power threshold.

[0113] Optionally, the control module 63 includes:

[0114] The third control submodule is used to control the high-power charging of the power battery based on the battery charge and battery temperature, including:

[0115] Get the current battery temperature;

[0116] When the current battery level is less than the first battery level threshold and / or the current battery level is greater than the second battery level threshold, high-power charging of the power battery shall be stopped.

[0117] When the current battery temperature exceeds the second preset temperature threshold, high-power charging of the power battery is stopped.

[0118] Optionally, the second acquisition module 62 further includes:

[0119] The third acquisition submodule is used to acquire the real-time battery temperature during the high-power charging process of the power battery.

[0120] Optionally, the control module 63 further includes:

[0121] The fourth control module is used to control the charging of the power battery based on the real-time battery temperature during high-power charging, including:

[0122] If the current battery charge is greater than the third charge threshold and the real-time battery temperature is greater than or equal to the first preset temperature threshold, high-power charging of the power battery will be stopped. The third charge threshold is greater than the second charge threshold.

[0123] Optionally, the control module 63 further includes:

[0124] The process of charging the power battery at high power also includes:

[0125] The fifth control module is used to heat or cool the power battery according to the real-time battery temperature, so that the battery temperature is within a preset temperature range.

[0126] It should be noted that this device is the same as the method described above. All implementations in the above method embodiments are applicable to the embodiments of this device and can achieve the same technical effect.

[0127] This invention also provides a battery management system, including the power battery charging control device described above.

[0128] This invention also provides a vehicle including the battery management system described above. All implementations of the methods described above are applicable to this embodiment and can achieve the same technical effects.

[0129] The power battery charging control method of this invention determines the power of the charging pile based on the communication standard between the charging pile and the vehicle. The vehicle then controls and regulates its thermal management system based on parameters such as the ambient temperature, the vehicle's current battery level, and the battery temperature to maintain a reasonable battery temperature and achieve optimal charging performance. This improves charging efficiency, shortens charging time, reduces waiting time for charging vehicles, and enhances the charging experience.

[0130] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A power battery charging control method, characterized in that, include: When configuring the charging pile and the vehicle for charging, obtain the maximum charging current value of the charging pile; When the maximum charging current value is greater than or equal to a preset current threshold, charging parameters are obtained to determine whether the charging pile is a high-power charging pile. The high-power charging pile utilizes the performance of batteries with a capacity of 3C or higher. The charging parameters include at least one of the following: ambient temperature, battery capacity, and battery temperature. The charging of the power battery is controlled according to the charging parameters. The charging control of the power battery based on the charging parameters includes: When the ambient temperature is less than or equal to a first preset temperature threshold, the power battery is determined to be charged at high power based on the battery charge and battery temperature, and the charging rate of the high power charging is greater than a preset value. When the ambient temperature exceeds the first preset temperature threshold, high-power charging of the power battery will be stopped. The step of determining high-power charging of the power battery based on battery charge and battery temperature includes: Get the current battery level and current battery temperature; When the current battery charge is greater than or equal to a first charge threshold and less than or equal to a second charge threshold, and the current battery temperature is less than or equal to a second preset temperature threshold, the power battery is charged at high power. Wherein, the first power threshold is less than or equal to the second power threshold.

2. The power battery charging control method according to claim 1, characterized in that, Based on battery charge and temperature, high-power charging control of the power battery also includes: When the current battery level is less than the first battery level threshold and / or the current battery level is greater than the second battery level threshold, high-power charging of the power battery shall be stopped. When the current battery temperature exceeds the second preset temperature threshold, high-power charging of the power battery is stopped.

3. The power battery charging control method according to claim 1, characterized in that, The process of charging the power battery at high power also includes: Obtain the real-time battery temperature during the high-power charging process of the power battery. If the current battery charge is greater than the third charge threshold and the real-time battery temperature is greater than the first preset temperature threshold, then high-power charging of the power battery will be stopped. The third charge threshold is greater than the second charge threshold.

4. The power battery charging control method according to any one of claims 1 to 3, characterized in that, The process of charging the power battery at high power also includes: The power battery is heated or cooled to keep the battery temperature within a preset temperature range.

5. A power battery charging control device, characterized in that, include: The first acquisition module is used to acquire the maximum charging current value of the charging pile when the charging pile and the vehicle are configured for charging. The second acquisition module is used to acquire charging parameters when the maximum charging current value is greater than or equal to a preset current threshold, and to determine whether the charging pile is a high-power charging pile. The high-power charging pile can utilize the performance of batteries with a capacity of 3C or higher. The charging parameters include at least one of the following: ambient temperature, battery capacity, and battery temperature. The control module is used to control the charging of the power battery according to the charging parameters; The control module includes: The first control submodule is used to control the charging of the power battery according to the charging parameters, including: When the ambient temperature is less than or equal to a first preset temperature threshold, the power battery is determined to be charged at high power based on the battery charge and battery temperature, and the charging rate of the high power charging is greater than a preset value. When the ambient temperature exceeds the first preset temperature threshold, high-power charging of the power battery will be stopped. The second acquisition module further includes: The second acquisition submodule is used to acquire the current battery level and current battery temperature; The control module includes: The second control submodule is used to perform high-power charging control of the power battery based on the battery charge and battery temperature, including: When the current battery charge is greater than or equal to a first charge threshold and less than or equal to a second charge threshold, and the current battery temperature is less than or equal to a second preset temperature threshold, the power battery is charged at high power. Wherein, the first power threshold is less than or equal to the second power threshold.

6. A battery management system, characterized in that, Includes the power battery charging control device as described in claim 5.

7. A car, characterized in that, Includes the battery management system as described in claim 6.

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