Vehicle battery cell voltage control method, device, electronic device and storage medium

Abstract

The present invention provides a method, device, electronic device and storage medium for controlling the voltage of a vehicle battery cell, wherein, when applied to new energy vehicles, the method comprises: determining the charging mode of the vehicle during the charging process; wherein, the charging mode comprises: a fast charging mode and a slow charging mode; wherein, the charging mode comprises: a fast charging mode and a slow charging mode; if the charging mode is a fast charging mode, the upper limit threshold of the charging of the single battery cell of the battery of the vehicle is increased during the charging process; if the charging mode is a slow charging mode, the upper limit threshold of the charging of the single battery cell of the battery of the vehicle is reduced during the charging process. In this way, the upper limit threshold of the charging of the single battery cell of the battery can be adaptively adjusted to balance the charging power of the fast charging mode and the slow charging mode, and reduce the difference in the mileage of the vehicle after being fully charged in the fast charging mode and the slow charging mode, thereby improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage systems, and in particular to a method, device, electronic equipment and storage medium for controlling vehicle battery cell voltage. Background Art

[0002] At present, the popularity of new energy vehicles has been increasing. Under the same driving conditions, car owners can choose fast charging mode or slow charging mode to charge the vehicle to fully charge the vehicle. Generally speaking, when the charging power of the vehicle reaches a certain threshold during the charging process, the main control module of the vehicle will determine that the vehicle is fully charged and charging is completed.

[0003] However, the charging capacity of the vehicle during the charging process generally fluctuates, and the fluctuation of the charging capacity in the fast charging mode is greater than that in the slow charging mode. Therefore, the charging capacity in the fast charging mode will reach the threshold before the charging capacity in the slow charging mode under greater fluctuations, resulting in the total capacity of the vehicle battery in the fast charging mode being less than the total capacity of the vehicle battery in the slow charging mode when the vehicle is fully charged in both the fast charging mode and the slow charging mode. Therefore, the mileage of the vehicle after being fully charged in the fast charging mode will be less than the mileage of the vehicle after being fully charged in the slow charging mode, resulting in a poor user experience. Summary of the invention

[0004] In view of this, the object of the present invention is to provide a method, device, electronic device and storage medium for controlling the voltage of a vehicle battery cell, so as to adaptively adjust the upper limit threshold of charging of a single battery cell of the battery, balance the charging capacity of the fast charging mode and the slow charging mode, and reduce the difference in the mileage of the vehicle after being fully charged in the fast charging mode and the slow charging mode, thereby improving the user experience.

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling the voltage of a vehicle battery cell, which is applied to new energy vehicles, and the method includes: determining a charging mode of the vehicle during a charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode; if the charging mode is a fast charging mode, the upper limit charging threshold of a single cell of the battery of the vehicle is increased during the charging process; if the charging mode is a slow charging mode, the upper limit charging threshold of a single cell of the battery of the vehicle is lowered during the charging process.

[0006] In an optional embodiment of the present application, the above-mentioned step of determining the charging mode of the vehicle during the charging process includes: obtaining the maximum current of the vehicle during the charging process; and determining the charging mode of the vehicle during the charging process based on the maximum current.

[0007] In an optional embodiment of the present application, the above-mentioned step of obtaining the maximum current of the vehicle during the charging process includes: obtaining the current of the vehicle during the charging process based on a current sensor; and determining that the maximum value of the current of the vehicle during the charging process is the maximum current of the vehicle during the charging process.

[0008] In an optional embodiment of the present application, the above-mentioned step of determining the charging mode of the vehicle during the charging process based on the maximum current includes: obtaining the rated current of the battery system of the vehicle; and determining the charging mode of the vehicle during the charging process based on the rated current and the maximum current.

[0009] In an optional embodiment of the present application, the above-mentioned step of determining the charging mode of the vehicle during the charging process based on the maximum current and the maximum current includes: if the maximum current is greater than the product of the rated current and a preset first multiple, determining that the charging mode of the vehicle during the charging process is a fast charging mode; if the maximum current is less than the product of the rated current and a preset second multiple, determining that the charging mode of the vehicle during the charging process is a slow charging mode; wherein the first multiple is greater than the second multiple.

[0010] In an optional embodiment of the present application, the above method further includes: obtaining an upper limit threshold of the battery cell rating of the vehicle and a maximum upper limit voltage within a safe range of the battery cell.

[0011] In an optional embodiment of the present application, the step of increasing the upper limit charging threshold of a single cell of the battery of the vehicle during the charging process includes: during the charging process, increasing the upper limit charging threshold of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit charging threshold of the battery cell and the maximum upper limit voltage; the step of lowering the upper limit charging threshold of a single cell of the battery of the vehicle during the charging process includes: during the charging process, lowering the upper limit charging threshold of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit charging threshold of the battery cell and the maximum upper limit voltage.

[0012] In an optional embodiment of the present application, the above-mentioned step of increasing the upper limit threshold of charging of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the maximum upper limit voltage includes: increasing the upper limit threshold of charging of a single cell of the battery of the vehicle by the following formula: V=Vn+(I / In)(Vmax-Vn); wherein, V is the upper limit threshold of charging of a single cell of the battery of the vehicle, Vn is the upper limit threshold of the battery cell amount, Vmax is the maximum upper limit voltage, I is the maximum current, and In is the rated current.

[0013] In an optional embodiment of the present application, the above-mentioned step of lowering the upper limit threshold of charging of a single cell of the battery of the vehicle based on the maximum current, rated current, upper limit threshold of the battery cell amount and maximum upper limit voltage includes: lowering the upper limit threshold of charging of a single cell of the battery of the vehicle by the following formula: V=Vn-(1-10I / In)(Vmax-Vn).

[0014] In an optional embodiment of the present application, the above method also includes: if the maximum current is less than or equal to the product of the rated current and the first multiple, and the maximum current is greater than or equal to the product of the rated current and the second multiple, determining that the charging mode of the vehicle during the charging process is a normal mode.

[0015] In an optional embodiment of the present application, the above method further includes: if the charging mode is a normal mode, the upper limit threshold of the charging of a single cell of the battery of the vehicle is not adjusted during the charging process.

[0016] In an optional embodiment of the present application, the above-mentioned step of determining the charging mode of the vehicle during the charging process includes: determining the type of charging equipment of the vehicle during the charging process; and determining the charging mode of the vehicle during the charging process based on the type of charging equipment.

[0017] In an optional embodiment of the present application, the above-mentioned step of determining the charging mode of the vehicle during the charging process based on the type of charging device includes: if the type of the charging device is a charging pile, determining that the charging mode of the vehicle during the charging process is a fast charging mode; if the type of the charging device is an on-board charger, determining that the charging mode of the vehicle during the charging process is a slow charging mode.

[0018] In the second aspect, an embodiment of the present invention also provides a vehicle battery cell voltage control device, which is applied to new energy vehicles, and the device includes: a charging mode determination module, which is used to determine the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode; a fast charging mode adjustment module, which is used to increase the upper limit charging threshold of the single cell of the vehicle's battery during the charging process if the charging mode is a fast charging mode; a slow charging mode adjustment module, which is used to lower the upper limit charging threshold of the single cell of the vehicle's battery during the charging process if the charging mode is a slow charging mode.

[0019] In a third aspect, an embodiment of the present invention further provides an electronic device, including a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the above-mentioned vehicle battery cell voltage control method.

[0020] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned vehicle battery cell voltage control method.

[0021] The embodiments of the present invention bring the following beneficial effects:

[0022] The embodiment of the present invention provides a method, device, electronic device and storage medium for controlling the voltage of a vehicle battery cell, which determines the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode; if the charging mode is a fast charging mode, the upper limit threshold of the charging of the single cell of the battery of the vehicle is increased during the charging process; if the charging mode is a slow charging mode, the upper limit threshold of the charging of the single cell of the battery of the vehicle is reduced during the charging process. In this way, the upper limit threshold of the charging of the single cell of the battery can be adaptively adjusted to balance the charging power of the fast charging mode and the slow charging mode, and reduce the difference in the mileage of the vehicle after being fully charged in the fast charging mode and the slow charging mode, thereby improving the user experience.

[0023] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0024] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A flow chart of a method for controlling a vehicle battery cell voltage provided by an embodiment of the present invention;

[0027] Figure 2 A flow chart of another method for controlling vehicle battery cell voltage provided by an embodiment of the present invention;

[0028] Figure 3 A flow chart of another method for controlling vehicle battery cell voltage provided by an embodiment of the present invention;

[0029] Figure 4A schematic diagram of the structure of a vehicle battery cell voltage control device provided by an embodiment of the present invention;

[0030] Figure 5 A schematic diagram of the structure of another vehicle battery cell voltage control device provided by an embodiment of the present invention;

[0031] Figure 6 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] At present, the popularity of new energy vehicles has been increasing. Under the same driving conditions, car owners can choose fast charging mode or slow charging mode to charge the vehicle to fully charge the vehicle. Generally speaking, when the charging power of the vehicle reaches a certain threshold during the charging process, the main control module of the vehicle will determine that the vehicle is fully charged and charging is completed.

[0034] However, the charging capacity of the vehicle during the charging process generally fluctuates, and the fluctuation of the charging capacity in the fast charging mode is greater than that in the slow charging mode. Therefore, the charging capacity in the fast charging mode will reach the threshold before the charging capacity in the slow charging mode under greater fluctuations, resulting in the total capacity of the vehicle battery in the fast charging mode being less than the total capacity of the vehicle battery in the slow charging mode when the vehicle is fully charged in both the fast charging mode and the slow charging mode. Therefore, the mileage of the vehicle after being fully charged in the fast charging mode will be less than the mileage of the vehicle after being fully charged in the slow charging mode, resulting in a poor user experience.

[0035] Based on this, an embodiment of the present invention provides a method, device, electronic device and storage medium for controlling the voltage of a vehicle battery cell, and specifically provides a method for adaptively adjusting the upper limit threshold of the battery cell voltage to control the charging capacity. The upper limit threshold of the charging of a single battery cell of the battery can be adaptively adjusted to balance the charging capacity of the fast charging mode and the slow charging mode, and reduce the difference in the mileage of the vehicle after being fully charged in the fast charging mode and the slow charging mode, thereby improving the user experience.

[0036] To facilitate understanding of this embodiment, a method for controlling a vehicle battery cell voltage disclosed in an embodiment of the present invention is first introduced in detail.

[0037] Embodiment 1:

[0038] The embodiment of the present invention provides a method for controlling the voltage of a vehicle battery cell, which is applied to new energy vehicles. New energy vehicles can also be called new energy vehicles. New energy vehicles refer to vehicles that use unconventional vehicle fuels as a power source (or use conventional vehicle fuels and adopt new vehicle-mounted power devices), integrate advanced technologies in vehicle power control and drive, and form vehicles with advanced technical principles, new technologies, and new structures. New energy vehicles include pure electric vehicles, extended-range electric vehicles, hybrid vehicles, fuel cell electric vehicles, hydrogen engine vehicles, etc.

[0039] Based on the above description, see Figure 1 A flow chart of a method for controlling a battery cell voltage of a vehicle is shown, and the method for controlling a battery cell voltage of a vehicle comprises the following steps:

[0040] Step S102, determining the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode.

[0041] New energy vehicles are generally equipped with a charging system that can be charged in fast charging mode or slow charging mode.

[0042] Fast charging is also called DC charging, that is, the off-board charger (fast charging pile) converts the AC power of the power grid into high-voltage DC power to charge the battery pack. It has high power and can efficiently and quickly charge the electric vehicle in a short time.

[0043] Fast charging piles are generally used in highway service areas, bus stations, community parking lots and other places. They are powered by 380V three-phase electricity. The power can reach tens of kilowatts and hundreds of kilowatts. Common ones are 45kw, 60kw, 120kw, 150kw, 180kw, etc. The output voltage platforms are 200-500V, 500-750V or 200-750V, etc., and the maximum output current is several hundred amperes.

[0044] The AC slow charging system is connected to the AC charging pile or a 220V household AC socket through a slow charging harness (charger pile or vehicle-mounted), and converts 220V AC power into DC power through the on-board charger OBC, thereby replenishing the power battery of the electric vehicle.

[0045] In this embodiment, the charging mode of the vehicle during the charging process can be determined. The charging mode of the vehicle can be the fast charging mode and the slow charging mode mentioned above, or can be other modes other than the fast charging mode and the slow charging mode mentioned above (for example, a mode with a charging speed between the fast charging mode and the slow charging mode, which is called the normal mode in this embodiment).

[0046] After determining the charging mode, in this embodiment, different ways of adjusting the upper limit threshold of the charging of the single cells of the battery of the vehicle may be adopted for different charging modes.

[0047] Step S104: if the charging mode is the fast charging mode, increasing the upper charging threshold of the single cell of the battery of the vehicle during the charging process.

[0048] When the vehicle is fully charged in the fast charging mode and the slow charging mode, the total power of the vehicle battery in the fast charging mode will be less than the total power of the vehicle battery in the slow charging mode.

[0049] Therefore, in the present embodiment, the upper limit threshold of charging of single cells of the vehicle's battery in fast charging mode can be increased, that is, the charging capacity in fast charging mode can be increased, and the total capacity of the vehicle battery in fast charging mode can be increased, thereby increasing the mileage of the vehicle after being fully charged in fast charging mode, thereby achieving the purpose of balancing the charging capacity in fast charging mode and slow charging mode, and reducing the difference in mileage of the vehicle after being fully charged in fast charging mode and slow charging mode.

[0050] Step S106: if the charging mode is the slow charging mode, lowering the upper limit threshold of the charging of the single cells of the battery of the vehicle during the charging process.

[0051] If the charging mode is slow charging mode, in this embodiment, the upper limit threshold of charging of single cells of the vehicle's battery in slow charging mode can be lowered, that is, the charging capacity in slow charging mode can be reduced, and the total capacity of the vehicle battery in slow charging mode can be reduced, thereby reducing the mileage of the vehicle after being fully charged in slow charging mode, thereby achieving the purpose of balancing the charging capacity in fast charging mode and slow charging mode, and reducing the difference in mileage of the vehicle after being fully charged in fast charging mode and slow charging mode.

[0052] The embodiment of the present invention provides a method for controlling the voltage of a vehicle battery cell, which determines the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode; if the charging mode is a fast charging mode, the upper limit threshold of the charging of the single battery cell of the vehicle's battery is increased during the charging process; if the charging mode is a slow charging mode, the upper limit threshold of the charging of the single battery cell of the vehicle's battery is reduced during the charging process. In this way, the upper limit threshold of the charging of the single battery cell of the battery can be adaptively adjusted to balance the charging power of the fast charging mode and the slow charging mode, and reduce the difference in the mileage of the vehicle after being fully charged in the fast charging mode and the slow charging mode, thereby improving the user experience.

[0053] Embodiment 2:

[0054] This embodiment provides another method for controlling the voltage of a vehicle battery cell. This method is implemented on the basis of the above embodiment. Figure 2A flow chart of another method for controlling the voltage of a vehicle battery cell is shown, and the method for controlling the voltage of a vehicle battery cell comprises the following steps:

[0055] Step S202, obtaining the maximum current of the vehicle during the charging process; and determining the charging mode of the vehicle during the charging process based on the maximum current.

[0056] In this embodiment, the charging mode of the vehicle during the charging process may be determined based on the maximum current of the vehicle during the charging process.

[0057] In some embodiments, the current of the vehicle during the charging process can be acquired based on a current sensor; and the maximum value of the current of the vehicle during the charging process is determined as the maximum current of the vehicle during the charging process.

[0058] In this embodiment, the current of the vehicle during the charging process can be obtained through a current sensor. The current sensor can be set in the circuit of the charging system of the vehicle. The current sensor is used to detect the current of the vehicle during the charging process.

[0059] The main control module of the vehicle can determine the maximum value of the current detected by the current sensor as the maximum current of the vehicle during the charging process based on the current of the vehicle during the charging process detected by the current sensor.

[0060] In some embodiments, the rated current of the battery system of the vehicle may be obtained; and the charging mode of the vehicle during the charging process may be determined based on the rated current and the maximum current.

[0061] After determining the maximum current I of the vehicle during the charging process, in this embodiment, the rated current In of the battery system of the vehicle may also be acquired, and the charging mode of the vehicle during the charging process may be determined based on the rated current I and the maximum current In.

[0062] In some embodiments, if the maximum current is greater than the product of the rated current and a preset first rate, it is determined that the charging mode of the vehicle during the charging process is a fast charging mode; if the maximum current is less than the product of the rated current and a preset second rate, it is determined that the charging mode of the vehicle during the charging process is a slow charging mode; wherein the first rate is greater than the second rate.

[0063] For example, the first magnification may be set to 0.3 and the second magnification may be set to 0.1. If the rated current I> the first magnification 0.3×the maximum current In, it may be determined that the charging mode of the vehicle during the charging process is the fast charging mode; if the rated current I< the second magnification 0.1×the maximum current In, it may be determined that the charging mode of the vehicle during the charging process is the slow charging mode.

[0064] After determining the above-mentioned maximum current I and rated current In, in this embodiment, some other parameters need to be obtained for adjusting the upper limit threshold of charging of a single cell of the battery of the vehicle.

[0065] In some embodiments, the upper limit threshold of the battery cell quota of the vehicle and the maximum upper limit voltage within the safety range of the battery cell may also be obtained. In this embodiment, the upper limit threshold Vn of the battery cell quota of the vehicle and the maximum upper limit voltage Vmax within the safety range of the battery cell may also be obtained.

[0066] Step S204: if the charging mode is the fast charging mode, increasing the upper charging threshold of the single cell of the battery of the vehicle during the charging process.

[0067] In some embodiments, during the charging process, the upper limit threshold of the charging of a single cell of the battery of the vehicle may be increased based on the maximum current, the rated current, the upper limit threshold of the battery cell rating, and the highest upper limit voltage.

[0068] In this embodiment, the upper limit threshold of charging of a single cell of the battery of the vehicle can be increased based on the maximum current I, the rated current In, the upper limit threshold Vn of the battery cell of the vehicle, and the highest upper limit voltage Vmax within the safety range of the battery cell.

[0069] Specifically, the upper limit threshold of charging of a single cell of the vehicle's battery can be increased by the following formula: V=Vn+(I / In)(Vmax-Vn); wherein V is the upper limit threshold of charging of a single cell of the vehicle's battery, Vn is the upper limit threshold of the battery cell capacity, Vmax is the maximum upper limit voltage, I is the maximum current, and In is the rated current.

[0070] By increasing the upper charging threshold of the single cell of the vehicle's battery through the above formula, the battery can be charged with more electricity, thereby increasing the total power of the vehicle battery in fast charging mode.

[0071] Step S206: if the charging mode is the slow charging mode, lowering the upper limit threshold of the charging of the single cells of the battery of the vehicle during the charging process.

[0072] In some embodiments, the upper limit threshold of charging a single cell of the battery of the vehicle may be lowered based on the maximum current, the rated current, the upper limit threshold of the battery cell rating, and the highest upper limit voltage.

[0073] In this embodiment, the upper limit threshold of charging of a single cell of the battery of the vehicle may be lowered based on the maximum current I, the rated current In, the upper limit threshold Vn of the battery cell of the vehicle, and the highest upper limit voltage Vmax within the safety range of the battery cell.

[0074] Specifically, the upper limit threshold of charging of a single cell of the vehicle's battery can be lowered by the following formula: V=Vn-(1-10I / In)(Vmax-Vn); wherein V is the upper limit threshold of charging of a single cell of the vehicle's battery, Vn is the upper limit threshold of the battery cell capacity, Vmax is the maximum upper limit voltage, I is the maximum current, and In is the rated current.

[0075] By lowering the upper limit threshold of the single-cell charging of the vehicle's battery through the above formula, the battery can be charged with less electricity, thereby reducing the total power of the vehicle battery in slow charging mode, thereby balancing the charging power in fast charging mode and slow charging mode, narrowing the difference in the mileage of the vehicle after full charge in fast charging mode and slow charging mode, and improving the user experience.

[0076] In addition, in addition to the fast charging mode and the slow charging mode, the charging mode may also be other modes, for example: a mode in which the charging speed is between the fast charging mode and the slow charging mode, which is referred to as the normal mode in this embodiment.

[0077] In some embodiments, if the maximum current is less than or equal to the product of the rated current and the first rate, and the maximum current is greater than or equal to the product of the rated current and the second rate, it is determined that the charging mode of the vehicle during the charging process is the normal mode.

[0078] Continuing with the example of setting the first magnification to 0.3 and the second magnification to 0.1, if the rated current I ≥ the first magnification 0.3×the maximum current In, and the rated current I ≤ the second magnification 0.1×the maximum current In, it can be determined that the charging mode of the vehicle during the charging process is the normal mode.

[0079] In some embodiments, if the charging mode is the normal mode, the upper charging limit threshold of the single cell of the battery of the vehicle is not adjusted during the charging process.

[0080] For the normal mode, the charging capacity of the normal mode is generally between the charging capacity of the fast charging mode and the charging capacity of the slow charging mode. Therefore, in this embodiment, the upper limit threshold of the charging capacity of the single cell of the battery of the vehicle in the normal mode may not be adjusted, that is, the upper limit threshold of the charging capacity of the single cell of the battery of the vehicle is kept unchanged.

[0081] The above method provided by the embodiment of the present invention can automatically adjust the upper charging limit threshold of the battery's single cell according to the feedback of the current sensor while ensuring the safety of the battery, based on the characteristic that the higher the battery power, the higher the voltage value, thereby achieving the purpose of controlling the charging power.

[0082] The above method provided by the embodiment of the present invention, through the feedback of the current sensor, when it is judged that the battery is in the fast charging mode, the upper limit threshold of the battery cell charging is automatically passed, so that the battery can be charged more. When it is judged that the battery is in the slow charging mode, the upper limit threshold of the battery cell charging is automatically lowered, so that the battery can be charged less. When it is judged that the battery is in the normal mode between fast charging and slow charging, the upper limit threshold of the battery cell charging is not adjusted.

[0083] The above method provided by the embodiment of the present invention can adaptively adjust the upper voltage threshold of the battery cell according to the charging status of the vehicle, thereby adaptively adjusting the charging power, which can reduce the mileage difference between the fast charging mode and the slow charging mode and improve the user's car experience.

[0084] Embodiment three:

[0085] This embodiment provides another method for controlling the voltage of a vehicle battery cell. This method is implemented on the basis of the above embodiment. Figure 3 A flow chart of another method for controlling the voltage of a vehicle battery cell is shown, and the method for controlling the voltage of a vehicle battery cell comprises the following steps:

[0086] Step S302, determining the type of charging equipment used by the vehicle during the charging process; and determining the charging mode of the vehicle during the charging process based on the type of charging equipment.

[0087] In addition to the method of determining the charging mode of the vehicle during the charging process based on the maximum current of the vehicle during the charging process mentioned in the aforementioned embodiment, the charging mode of the vehicle during the charging process can be determined in some other ways in this embodiment.

[0088] For example, the charging mode of the vehicle during the charging process is determined based on the type of the charging device used by the vehicle during the charging process. In this embodiment, the charging device can send information representing the type of the charging device to the main control module of the vehicle; the main control module can parse the information to obtain the type of the charging device, and then determine the charging mode of the vehicle during the charging process according to the type of the charging device.

[0089] In some embodiments, if the type of the charging device is a charging pile, it is determined that the charging mode of the vehicle during the charging process is a fast charging mode; if the type of the charging device is an on-board charger, it is determined that the charging mode of the vehicle during the charging process is a slow charging mode.

[0090] That is, if the main control module parses and obtains that the type of charging device is a charging pile, it can be determined that the charging mode of the vehicle during the charging process is a fast charging mode; if the main control module parses and obtains that the type of charging device is a vehicle-mounted charger, it can be determined that the charging mode of the vehicle during the charging process is a slow charging mode.

[0091] It should be noted here that the types of charging equipment are not limited to charging piles and on-board chargers. In this embodiment, the specific content of the type of charging equipment is not limited. It is only necessary to pre-set the correspondence between the type of charging equipment and the charging mode. The main control module can determine the charging mode of the vehicle during the charging process based on the type of charging equipment.

[0092] Step S304: if the charging mode is the fast charging mode, the upper limit threshold of the charging of the single cells of the battery of the vehicle is increased during the charging process.

[0093] For the specific steps of increasing the upper charge threshold of the single cell of the battery of the vehicle during the charging process in this embodiment, reference may be made to the corresponding contents of increasing the upper charge threshold of the single cell of the battery of the vehicle in the aforementioned embodiment, which will not be repeated in this embodiment.

[0094] Step S306: if the charging mode is the slow charging mode, lower the upper charging threshold of the single cell of the battery of the vehicle during the charging process.

[0095] For the specific steps of lowering the upper limit threshold of charging of a single cell of the battery of the vehicle during charging in this embodiment, reference may be made to the corresponding contents of lowering the upper limit threshold of charging of a single cell of the battery of the vehicle in the aforementioned embodiment, which will not be repeated in this embodiment.

[0096] Embodiment 4:

[0097] Corresponding to the above method embodiment, the present invention provides a vehicle battery cell voltage control device, which is applied to new energy vehicles, see Figure 4 The structure diagram of a control device for a vehicle battery cell voltage is shown, and the control device for a vehicle battery cell voltage includes:

[0098] The charging mode determination module 41 is used to determine the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode;

[0099] The fast charging mode adjustment module 42 is used to increase the upper limit threshold of the single cell charging of the battery of the vehicle during the charging process if the charging mode is the fast charging mode;

[0100] The slow charging mode adjustment module 43 is used to reduce the upper charging limit threshold of the single cell of the battery of the vehicle during the charging process if the charging mode is the slow charging mode.

[0101] The embodiment of the present invention provides a control device for the battery cell voltage of a vehicle, which determines the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; wherein the charging mode includes: a fast charging mode and a slow charging mode; if the charging mode is a fast charging mode, the upper limit threshold of the charging of the single cell of the battery of the vehicle is increased during the charging process; if the charging mode is a slow charging mode, the upper limit threshold of the charging of the single cell of the battery of the vehicle is reduced during the charging process. In this way, the upper limit threshold of the charging of the single cell of the battery can be adaptively adjusted to balance the charging power of the fast charging mode and the slow charging mode, and reduce the difference in the mileage of the vehicle after being fully charged in the fast charging mode and the slow charging mode, thereby improving the user experience.

[0102] In a feasible embodiment of the present invention, the above-mentioned charging mode determination module is used to determine the charging mode of the vehicle during the charging process, including: obtaining the maximum current of the vehicle during the charging process; and determining the charging mode of the vehicle during the charging process based on the maximum current.

[0103] In a feasible embodiment of the present invention, the charging mode determination module is used to obtain the current of the vehicle during the charging process based on the current sensor; and determine the maximum value of the current of the vehicle during the charging process as the maximum current of the vehicle during the charging process.

[0104] In a feasible embodiment of the present invention, the charging mode determination module is used to obtain the rated current of the battery system of the vehicle; and determine the charging mode of the vehicle during the charging process based on the rated current and the maximum current.

[0105] In a feasible embodiment of the present invention, the above-mentioned charging mode determination module is used to determine that the charging mode of the vehicle during the charging process is a fast charging mode if the maximum current is greater than the product of the rated current and a preset first multiple; if the maximum current is less than the product of the rated current and a preset second multiple, determine that the charging mode of the vehicle during the charging process is a slow charging mode; wherein the first multiple is greater than the second multiple.

[0106] See also Figure 5 The structural schematic diagram of another vehicle battery cell voltage control device is shown. In a feasible embodiment of the present invention, the vehicle battery cell voltage control device also includes: other parameter acquisition module 44, which is used to obtain the vehicle's battery cell quota upper limit threshold and the highest upper limit voltage within the battery cell safety range.

[0107] In a feasible embodiment of the present invention, the above-mentioned fast charging mode adjustment module is used to increase the upper limit charging threshold of the single cell of the vehicle's battery based on the maximum current, rated current, the upper limit charging threshold of the battery cell and the maximum upper limit voltage during the charging process; the above-mentioned slow charging mode adjustment module is used to lower the upper limit charging threshold of the single cell of the vehicle's battery based on the maximum current, rated current, the upper limit charging threshold of the battery cell and the maximum upper limit voltage during the charging process.

[0108] In a feasible embodiment of the present invention, the above-mentioned fast charging mode adjustment module is used to increase the upper limit threshold of charging of a single cell of the vehicle's battery through the following formula: V=Vn+(I / In)(Vmax-Vn); wherein, V is the upper limit threshold of charging of a single cell of the vehicle's battery, Vn is the upper limit threshold of the battery cell, Vmax is the maximum upper limit voltage, I is the maximum current, and In is the rated current.

[0109] In a feasible embodiment of the present invention, the above-mentioned slow charging mode adjustment module is used to reduce the upper limit threshold of the single cell charging of the battery of the vehicle through the following formula: V=Vn-(1-10I / In)(Vmax-Vn).

[0110] like Figure 5 As shown, in a feasible embodiment of the present invention, the control device for the vehicle battery cell voltage also includes: a normal mode processing module 45, which is used to determine that the charging mode of the vehicle during the charging process is a normal mode if the maximum current is less than or equal to the product of the rated current and the first multiple, and the maximum current is greater than or equal to the product of the rated current and the second multiple.

[0111] In a feasible embodiment of the present invention, the above-mentioned normal mode processing module is also used for not adjusting the upper limit threshold of charging of a single cell of the battery of the vehicle during the charging process if the charging mode is the normal mode.

[0112] In a feasible embodiment of the present invention, the charging mode determination module is used to determine the type of charging equipment of the vehicle during the charging process; and determine the charging mode of the vehicle during the charging process based on the type of charging equipment.

[0113] In a feasible embodiment of the present invention, the above-mentioned charging mode determination module is used to determine that the charging mode of the vehicle during the charging process is a fast charging mode if the type of the charging device is a charging pile; if the type of the charging device is an on-board charger, determine that the charging mode of the vehicle during the charging process is a slow charging mode.

[0114] Technicians in the relevant field can clearly understand that, for the convenience and simplicity of description, the specific working process of the vehicle battery cell voltage control system described above can refer to the corresponding process in the aforementioned embodiment of the vehicle battery cell voltage control method, and will not be repeated here.

[0115] Embodiment five:

[0116] The embodiment of the present invention also provides an electronic device for implementing the above-mentioned vehicle battery cell voltage control method; see Figure 6 A structural schematic diagram of an electronic device is shown, which includes a memory 100 and a processor 101, wherein the memory 100 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the above-mentioned vehicle battery cell voltage control method.

[0117] Further, Figure 6 The electronic device shown further includes a bus 102 and a communication interface 103 , and the processor 101 , the communication interface 103 and the memory 100 are connected via the bus 102 .

[0118] The memory 100 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0119] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100 and completes the steps of the method of the above embodiment in combination with its hardware.

[0120] An embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned vehicle battery cell voltage control method. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0121] The vehicle cell voltage control method, device, electronic device and computer program product of the storage medium provided in the embodiments of the present invention include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods in the previous method embodiments. The specific implementation can be found in the method embodiments, which will not be repeated here.

[0122] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and / or device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0123] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0124] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0125] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0126] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for controlling the voltage of a vehicle battery cell, characterized in that: Applied to new energy vehicles, the method comprises: Determine a charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; If the charging mode is the fast charging mode, increasing the upper limit threshold of the charging of a single cell of the battery of the vehicle during the charging process; If the charging mode is the slow charging mode, lowering the upper limit threshold of the charging of a single cell of the battery of the vehicle during the charging process; The step of determining a charging mode of a vehicle during a charging process comprises: obtaining a maximum current of the vehicle during the charging process; determining a charging mode of the vehicle during the charging process based on the maximum current; The step of determining the charging mode of the vehicle in the charging process based on the maximum current includes: obtaining a rated current of a battery system of the vehicle; determining the charging mode of the vehicle in the charging process based on the rated current and the maximum current; The step of determining the charging mode of the vehicle in the charging process based on the rated current and the maximum current includes: if the maximum current is greater than the product of the rated current and a preset first multiple, determining that the charging mode of the vehicle in the charging process is the fast charging mode; if the maximum current is less than the product of the rated current and a preset second multiple, determining that the charging mode of the vehicle in the charging process is the slow charging mode; wherein the first multiple is greater than the second multiple, the first multiple is 0.3, and the second multiple is 0.1; The method further includes: obtaining an upper limit threshold of the battery cell amount of the vehicle and a maximum upper limit voltage within a safe range of the battery cell; The step of increasing the upper limit threshold of charging of a single cell of the battery of the vehicle during the charging process comprises: increasing the upper limit threshold of charging of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the highest upper limit voltage during the charging process; the step of decreasing the upper limit threshold of charging of a single cell of the battery of the vehicle during the charging process comprises: decreasing the upper limit threshold of charging of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the highest upper limit voltage during the charging process; The step of increasing the upper limit threshold of charging of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the highest upper limit voltage comprises: increasing the upper limit threshold of charging of a single cell of the battery of the vehicle by the following formula: V=Vn+(I / In)(Vmax-Vn); wherein V is the upper limit threshold of charging of a single cell of the battery of the vehicle, Vn is the upper limit threshold of the battery cell amount, Vmax is the highest upper limit voltage, I is the maximum current, and In is the rated current; The step of lowering the upper limit threshold of charging of a single cell of the battery of the vehicle based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the maximum upper limit voltage includes: lowering the upper limit threshold of charging of a single cell of the battery of the vehicle by the following formula: V=Vn-(1-10I / In)(Vmax-Vn).

2. The method according to claim 1, characterized in that The steps to obtain the maximum current of the vehicle during charging include: Acquire the current of the vehicle during charging based on the current sensor; The maximum value of the current of the vehicle during the charging process is determined as the maximum current of the vehicle during the charging process.

3. The method according to claim 1, characterized in that The method further comprises: If the maximum current is less than or equal to the product of the rated current and the first rate, and the maximum current is greater than or equal to the product of the rated current and the second rate, it is determined that the charging mode of the vehicle in the charging process is a normal mode.

4. The method according to claim 3, characterized in that The method further comprises: If the charging mode is the normal mode, the upper limit threshold of charging of a single cell of the battery of the vehicle is not adjusted during the charging process.

5. The method according to claim 1, characterized in that The steps of determining a charging mode of a vehicle during a charging process include: Determining the type of charging equipment used by the vehicle during charging; A charging mode of the vehicle during the charging process is determined based on the type of the charging equipment.

6. The method according to claim 5, characterized in that The step of determining a charging mode of the vehicle in the charging process based on the type of the charging device includes: If the type of the charging device is a charging pile, determining that the charging mode of the vehicle in the charging process is the fast charging mode; If the type of the charging device is an on-board charger, it is determined that the charging mode of the vehicle in the charging process is the slow charging mode.

7. A control device for a vehicle battery cell voltage, characterized in that: Applied to new energy vehicles, the device comprises: A charging mode determination module, used to determine the charging mode of the vehicle during the charging process; wherein the charging mode includes: a fast charging mode and a slow charging mode; A fast charging mode adjustment module, configured to increase a charging upper limit threshold of a single cell of a battery of the vehicle during the charging process if the charging mode is the fast charging mode; A slow charging mode adjustment module, configured to reduce an upper charging threshold of a single cell of a battery of the vehicle during the charging process if the charging mode is the slow charging mode; The charging mode determination module is used to obtain the maximum current of the vehicle during the charging process; and determine the charging mode of the vehicle during the charging process based on the maximum current; The charging mode determination module is used to obtain the rated current of the battery system of the vehicle; and determine the charging mode of the vehicle in the charging process based on the rated current and the maximum current; The charging mode determination module is used to determine that the charging mode of the vehicle in the charging process is the fast charging mode if the maximum current is greater than the product of the rated current and a preset first magnification; if the maximum current is less than the product of the rated current and a preset second magnification, determine that the charging mode of the vehicle in the charging process is the slow charging mode; wherein the first magnification is greater than the second magnification, the first magnification is 0.3, and the second magnification is 0.1; The device further comprises: another parameter acquisition module, which is used to acquire the upper limit threshold of the battery cell quota of the vehicle and the highest upper limit voltage within the safety range of the battery cell; The fast charging mode adjustment module is used to increase the upper limit charging threshold of the single cell of the battery of the vehicle during the charging process based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the maximum upper limit voltage; the slow charging mode adjustment module is used to reduce the upper limit charging threshold of the single cell of the battery of the vehicle during the charging process based on the maximum current, the rated current, the upper limit threshold of the battery cell amount and the maximum upper limit voltage; The fast charging mode adjustment module is used to increase the upper limit threshold of the single cell charging of the battery of the vehicle through the following formula: V=Vn+(I / In)(Vmax-Vn); wherein V is the upper limit threshold of the single cell charging of the battery of the vehicle, Vn is the upper limit threshold of the battery cell, Vmax is the maximum upper limit voltage, I is the maximum current, and In is the rated current; The slow charging mode adjustment module is used to reduce the upper limit threshold of the single cell charging of the battery of the vehicle through the following formula: V=Vn-(1-10I / In)(Vmax-Vn).

8. An electronic device, characterized in that: It comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the vehicle battery cell voltage control method as described in any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions. When the computer-executable instructions are called and executed by the processor, the computer-executable instructions prompt the processor to implement the vehicle battery cell voltage control method according to any one of claims 1 to 6.

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