Battery step charging test method, device and electronic equipment

Abstract

The present invention discloses a battery step-charging test method, device, and electronic device. The method comprises: dividing the charging process into n charging stages according to the battery's charging capacity; wherein n is greater than 1 and is a positive integer; charging the first n-1 charging stages, and then obtaining the charging time of the nth charging stage based on the cutoff voltage; and determining the charging capacity and charging parameters of each charging stage based on the relationship between the charging time and a preset time. The present invention provides a battery step-charging test method, device, and electronic device, which implement the testing of the charging capacity and charging parameters of step-charging, improve the accuracy of step-charging, and thereby improve the charging safety and service life of the battery.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of battery charging technology, and in particular to a battery step charging test method, device, and electronic equipment. Background Art

[0002] Electric vehicles primarily draw their power from their battery systems, and the battery's charge directly impacts the vehicle's range. To meet the required range, the battery system must be charged with sufficient power. Existing charging processes typically utilize a step-by-step method to increase the battery's charge capacity.

[0003] In the existing technology, the charging curve Vt-SOC is divided into several rectangles and the charging parameters of each step are obtained using the charging curve. However, the testing process of the charging curve itself is easily affected by the environment, resulting in data deviation, which in turn affects the charging parameters of each step and causes inaccurate charging parameter settings, thereby affecting the charging safety and service life of the battery. Summary of the Invention

[0004] The present invention provides a battery step charging test method, device and electronic equipment, which improve the charging capacity and charging parameter accuracy of the step charging, thereby improving the charging safety and service life of the battery.

[0005] In a first aspect, an embodiment of the present invention provides a battery step charging test method, comprising:

[0006] The charging process is divided into n charging stages according to the charging capacity of the battery; wherein n is greater than 1 and is a positive integer;

[0007] Charging the first n-1 charging stages, and then obtaining the charging time of the nth charging stage according to the cut-off voltage;

[0008] The charging capacity and charging parameters of each charging stage are determined according to the relationship between the charging time and the preset time.

[0009] Optionally, charging the first n-1 charging stages and then obtaining the charging time of the nth charging stage according to the cut-off voltage includes:

[0010] Obtaining the preset charging capacity and preset charging parameters of the first n-1 charging stages;

[0011] Charging the first n-1 charging stages according to the preset charging capacity and the preset charging parameters;

[0012] After the first n-1 charging stages are completed, the battery is charged in the nth charging stage, and the charging time is recorded when the battery is charged to the cut-off voltage.

[0013] Optionally, determining the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time includes:

[0014] If the charging time exceeds the preset time, the preset charging capacity and / or the preset charging parameters of at least one of the first n-1 charging stages are adjusted, and the charging time of the nth charging stage is obtained again until the charging time is less than or equal to the preset time, thereby determining the charging capacity and the charging parameters of each charging stage.

[0015] Optionally, the charging parameters include a temperature influence factor and a charging current multiple.

[0016] Optionally, after determining the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time, the method further includes:

[0017] The charging time of each charging stage is determined according to the charging capacity and the charging parameters.

[0018] Optionally, the charging time of each charging stage is a ratio of the charging capacity to the charging current;

[0019] The charging current is the product of the temperature influence factor, the charging current multiple and the rated current.

[0020] Optionally, the product of the charging current multiple and the rated current is less than or equal to the maximum charging current allowed by the battery.

[0021] Optionally, the charging capacity of each charging stage is less than the rated capacity of the battery.

[0022] In a second aspect, an embodiment of the present invention provides a battery step charging test device, comprising:

[0023] A division module, used to divide the charging process into n charging stages according to the charging capacity of the battery;

[0024] A charging module, configured to charge the first n-1 charging stages and then obtain a charging time for the nth charging stage according to the cut-off voltage;

[0025] The regulating module is used to determine the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time.

[0026] In a third aspect, an embodiment of the present invention provides an electronic device, comprising:

[0027] at least one processor; and

[0028] a memory communicatively connected to the at least one processor; wherein,

[0029] The memory stores a computer program that can be executed by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can perform any of the battery step charging test methods provided in the embodiments of the present invention.

[0030] The present invention provides a battery step charging test method, device and electronic equipment, which utilize a cutoff voltage to obtain the charging time of the nth charging stage. Using the charging time of the nth charging stage as a reference standard, one or more step charging capacities and charging parameters of the front-end stage are adjusted. Through actual measurement, the charging process of the front stage can be flexibly adjusted, so that the step charging of the battery can be set according to actual conditions, so that the charging process meets the charging requirements, reduces drift errors caused by other factors, improves the accuracy of step charging, and thus improves the charging safety and service life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A flow chart of a battery step charging test method is provided for an embodiment of the present invention;

[0032] Figure 2 A flow chart of a battery step charging test method is provided for an embodiment of the present invention;

[0033] Figure 3 Relationship diagram between charging time and charging capacity in each stage;

[0034] Figure 4 A battery step charging test device is provided for an embodiment of the present invention;

[0035] Figure 5 A schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0037] Figure 1A flowchart of a battery step-charging test method is provided for an embodiment of the present invention. This embodiment is applicable to battery step-charging test situations. The method can be performed by a battery step-charging test device, which can be implemented using hardware and / or software. The method specifically includes the following steps:

[0038] S110, dividing the charging process into n charging stages according to the charging capacity of the battery; wherein n is greater than 1 and is a positive integer;

[0039] Specifically, the charging capacity of a battery refers to the charging current multiple that the battery cell can withstand. For example, the battery can be charged at charging current multiples of 0.5C, 1.2C, 0.6C, 0.3C and 0.1C, and the battery can be divided into 5 charging stages.

[0040] S120, charging the first n-1 charging stages, and then obtaining the charging time of the nth charging stage according to the cut-off voltage;

[0041] Specifically, the first n-1 charging stages are charged according to preset parameters. When entering the nth charging stage, the time when the battery reaches the cutoff voltage is obtained, which is the charging time. For example, the charging capacity, charging current multiplier, and temperature influence factor are set for each charging stage. The battery is charged according to the set parameters. After completing the first n-1 charging stages, the charging process enters the nth charging stage. When the nth charging stage reaches the cutoff voltage, it is defined as the full charge moment, and the charging time of this stage can be recorded.

[0042] S130: Determine the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time.

[0043] Specifically, the preset time is a reasonable threshold for the charging time of the nth charging stage. If the charging time of the nth charging stage is less than or equal to the preset time, then the charging capacity and charging parameters of the nth charging stage can meet the charging requirements. The charging capacity and charging parameters of each stage can be determined based on the preset parameters of the first n-1 charging stages and the charging capacity and charging parameters of the nth charging stage. If the charging time of the nth charging stage exceeds the preset time, it means that the charging duration of the nth charging stage is too long and does not meet the charging requirements. Exemplarily, the charging capacity and / or charging parameters of one or more charging stages at the front end can be adjusted to reduce the charging duration of the nth charging stage. The charging capacity and charging parameters of each charging stage are then determined.

[0044] The present invention provides a battery step charging test method, device and electronic equipment, which utilize a cutoff voltage to obtain the charging time of the nth charging stage. Using the charging time of the nth charging stage as a reference standard, one or more step charging capacities and charging parameters of the front-end stage are adjusted. Through actual measurement, the charging process of the front stage can be flexibly adjusted, so that the step charging of the battery can be set according to actual conditions, so that the charging process meets the charging requirements, reduces drift errors caused by other factors, improves the accuracy of step charging, and thus improves the charging safety and service life of the battery.

[0045] Figure 2 A flow chart of a battery step charging test method is provided for an embodiment of the present invention. Figure 2 , methods include:

[0046] S210, dividing the charging process into n charging stages according to the charging capacity of the battery; wherein n is greater than 1 and is a positive integer;

[0047] S220, obtaining a preset charging capacity and preset charging parameters for the first n-1 charging stages;

[0048] Among them, the preset charging parameters include coefficients that affect the charging capacity, such as the charging current multiple and the temperature influence factor. According to the preset charging parameters and the rated charging current, the charging capacity of each stage of the first n-1 charging stages can be obtained.

[0049] S230, charging the first n-1 charging stages according to a preset charging capacity and preset charging parameters;

[0050] S240 , after the first n-1 charging stages are completed, the battery is charged in the nth charging stage, and the charging time is recorded when the battery is charged to the cut-off voltage.

[0051] Specifically, after the first n-1 charging stages are completed, the charging process of the nth stage is entered, the timing is started, and the battery voltage is measured during charging. When the charging voltage reaches the cut-off voltage, the charging is considered complete, and the charging time of the nth charging stage is recorded.

[0052] S250: Determine the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time.

[0053] Optionally, the charging capacity and charging parameters of each charging stage are determined based on the relationship between the charging time and the preset time, including:

[0054] If the charging time exceeds the preset time, the preset charging capacity and / or preset charging parameters of at least one of the first n-1 charging stages are adjusted, and the charging time of the nth charging stage is obtained again until the charging time is less than or equal to the preset time, thereby determining the charging capacity and charging parameters of each charging stage.

[0055] Specifically, if the charging time of the final stage determined by testing is too long and fails to meet the charging time requirement, this indicates that the charging capacity of the final stage is too large and cannot be fully charged within the preset time. For example, the preset charging capacity of any one or more of the first n-1 charging stages can be adjusted. Since the total battery capacity of the battery remains unchanged, the preset charging capacity of the final stage can be increased, thereby reducing the charging capacity of the final stage and thus reducing the charging time of the final stage. The charging capacity of the final stage can also be adjusted by increasing the preset charging capacity of any of the first n-1 charging stages and adjusting the preset charging parameters of each stage so that the charging time of the final stage meets the requirement. Optionally, to facilitate adjustment, if the charging time of the final stage determined by testing is too long and fails to meet the charging time requirement, the preset charging capacity of the n-1th charging stage can be increased and the charging time of the final stage can be retested. If the charging time of the final stage still fails to meet the charging time requirement, the preset charging capacity of the n-1th charging stage and the preset charging parameters of each stage can be increased until the charging requirement is met, thereby determining the charging capacity and charging parameters for each charging stage.

[0056] Optionally, the charging parameters include a temperature influence factor and a charging current multiple.

[0057] Specifically, the temperature impact factor is the coefficient of temperature affecting the charging capacity value. The temperature impact factor ranges from 0 to 1. When the temperature is normal, the temperature impact factor an is 1. When the temperature is low or high, the temperature impact factor an is less than 1. The charging capacity of each stage can be expressed as the product of the temperature impact factor, the charging current multiple, the rated current, and the charging time of each stage. Therefore, the total charging capacity of the battery c = a1b1I0t1+a2b2I0t2+a3b3I0t3+...+a n-1 b n-1 I0t n-1 +a n b n I0t n

[0058] That is, c=c1+c2+c3+...+c n-1 +c n

[0059] Where I0 is the rated charging current, which is determined by the charging capacity of the battery cell and is a known value;

[0060] a1, a2, a3…a n-1 、a n The temperature impact factor corresponding to each charging stage;

[0061] b1, b2, b3…b n-1 、b n The charging current multiple corresponding to each charging stage;

[0062] c1, c2, c3…c n-1 is the charging capacity corresponding to the first n-1 charging stages;

[0063] t1, t2, t3…t n-1 is the charging time corresponding to the first n-1 charging stages, t n is the charging time of the last stage, t n Can be obtained through measurement.

[0064] Optionally, after determining the charging parameters of each charging stage according to the relationship between the charging time and the preset time, the method further includes:

[0065] The charging time for each charging stage is determined according to the charging capacity and charging parameters.

[0066] Specifically, the rated charging current can be known based on the battery performance. Therefore, the charging time for each stage can be quickly obtained based on the rated charging current combined with the charging parameters and the relationship between the charging time and the charging capacity.

[0067] Optionally, the charging time of each charging stage is a ratio of the charging capacity to the charging current;

[0068] The charging current is the product of the temperature influence factor, the charging current multiple and the rated current.

[0069] Specifically, the charging time is calculated as: Among them, t m is the charging time of the mth charging stage, c m is the charging capacity of the mth charging stage, a m b m I0 is the charging current of the mth charging stage, 1≤m≤n-1, and is a positive integer. The charging time of the nth charging stage can be obtained during testing.

[0070] For example, according to this embodiment, the charging time and total charging time of different steps can be quickly calculated. Assuming that charging is divided into 5 stages, the total charging capacity c is equal to the rated capacity c0 of 58Ah, the rated current I0 is 58A, and assuming that it is at room temperature, the temperature influence factor is 1. The charging current multiple b1 of the first charging stage is 0.5, the charging current multiple b2 of the second charging stage is 1.2, the charging current multiple b3 of the third charging stage is 0.6, the charging current multiple b4 of the fourth charging stage is 0.3, and the charging current multiple b5 of the fifth charging stage is 0.1. The charging capacity c1 of the first charging stage is 0.1c0, the charging capacity c2 of the second charging stage is 0.6c0, the charging capacity c3 of the third charging stage is 0.2c0, the charging capacity c4 of the fourth charging stage is 0.07c0, and the charging capacity c5 of the fifth charging stage is 0.03c0. Then:

[0071] c=a1b1I0t1+a2b2I0t2+a3b3I0t3+a4b4I0t4+a5b5I0t5

[0072] That is: 0.5t1+1.2t2+0.6t3+0.3t4+0.1t5=1

[0073] 0.5t1=0.1

[0074] 1.2t2=0.6

[0075] 0.6t3=0.2

[0076] 0.3t4==0.07

[0077] 0.1t5=0.03

[0078] Calculation results show that: t1 = 0.2h, t2 = 0.5h, t3 = 0.33h, t4 = 0.23h, t5 = 0.3h. According to the calculation results, we can get Figure 3 The relationship diagram between charging time and charging capacity in each stage can quickly calculate the charging time and total charging time of different steps.

[0079] Optionally, the product of the charging current multiple and the rated current is less than or equal to the maximum allowable charging current of the battery.

[0080] Specifically, the charging current in each stage needs to be less than or equal to the maximum allowable charging current of the battery to ensure charging safety.

[0081] Optionally, the charging capacity of each charging stage is less than the rated capacity of the battery. Specifically, the rated capacity of the battery can be obtained based on the type and performance of the battery, which is a known value. The charging capacity of each stage needs to be less than the rated capacity to further improve charging safety.

[0082] Figure 4 The present invention provides a battery step charging test device, see Figure 4 ,include:

[0083] a division module 110 for dividing the charging process into n charging stages according to the charging capacity of the battery;

[0084] The charging module 120 is used to charge the first n-1 charging stages and then obtain the charging time of the nth charging stage according to the cut-off voltage;

[0085] The adjustment module 130 is configured to determine the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time.

[0086] Specifically, the charging capacity of a battery refers to the charging current multiple that the battery cell can withstand. For example, the battery can be charged at charging current multiples of 0.5C, 1.2C, 0.6C, 0.3C and 0.1C, and the division module 110 can divide the battery into 5 charging stages. The charging module 120 charges the first n-1 charging stages according to preset parameters. When entering the nth charging stage, the time when the battery reaches the cut-off voltage is obtained, which is the charging time. For example, the charging module 120 sets the charging capacity, charging current multiple and temperature influence factor of each charging stage, and charges the battery according to the set parameters. After completing the first n-1 charging stages, the charging process enters the nth stage of charging. When the nth charging stage is charged to the cut-off voltage, it is defined as the full charge moment, and the charging time of this stage can be recorded. The preset time is a reasonable threshold for the charging time of the nth charging stage. If the charging time of the nth charging stage is less than or equal to the preset time, then the settings of the charging capacity and charging parameters of the nth charging stage can meet the charging requirements. The adjustment module can determine the charging capacity and charging parameters of each stage based on the preset parameters of the first n-1 charging stages and the charging capacity and charging parameters of the nth charging stage. If the charging time of the nth charging stage exceeds the preset time, it means that the charging duration of the nth charging stage is too long and does not meet the charging requirements. Exemplarily, the adjustment module 130 can adjust the charging capacity and / or charging parameters of one or more charging stages at the front end, thereby reducing the charging duration of the nth charging stage, and then determining the charging capacity and charging parameters of each charging stage.

[0087] An embodiment of the present invention further provides an electronic device, the electronic device comprising:

[0088] at least one processor; and

[0089] a memory communicatively connected to at least one processor; wherein,

[0090] The memory stores a computer program that can be executed by at least one processor. The computer program is executed by the at least one processor so that the at least one processor can execute any battery step charging test method in the embodiments of the present invention.

[0091] Figure 5 A schematic diagram of the structure of an electronic device provided for an embodiment of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device may also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0092] like Figure 5 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0093] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0094] The processor 11 may be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A battery step charging test method, characterized in that: include: The charging process is divided into n charging stages according to the charging capacity of the battery; wherein n is greater than 1 and is a positive integer; Charging the first n-1 charging stages, and then obtaining the charging time of the nth charging stage according to the cut-off voltage; Determining the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time; wherein determining the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time includes: If the charging time exceeds the preset time, the preset charging capacity and / or charging parameters of at least one of the first n-1 charging stages are adjusted, and the charging time of the nth charging stage is obtained again until the charging time is less than or equal to the preset time, thereby determining the charging capacity and charging parameters of each charging stage.

2. The battery step charging test method according to claim 1, wherein: Charging the first n-1 charging stages, and then obtaining the charging time of the nth charging stage according to the cut-off voltage, includes: Obtaining the preset charging capacity and preset charging parameters of the first n-1 charging stages; Charging the first n-1 charging stages according to the preset charging capacity and the preset charging parameters; After the first n-1 charging stages are completed, the battery is charged in the nth charging stage, and the charging time is recorded when the battery is charged to the cut-off voltage.

3. The battery step charging test method according to any one of claims 1-2, characterized in that: The charging parameters include a temperature influence factor and a charging current multiple.

4. The battery step charging test method according to claim 3, wherein: After determining the charging capacity and charging parameters of each charging stage according to the relationship between the charging time and the preset time, the method further includes: The charging time of each charging stage is determined according to the charging capacity and the charging parameters.

5. The battery step charging test method according to claim 4, characterized in that: The charging time of each charging stage is the ratio of the charging capacity to the charging current; The charging current is the product of the temperature influence factor, the charging current multiple and the rated current.

6. The battery step charging test method according to claim 4, characterized in that: The product of the charging current multiple and the rated current is less than or equal to the maximum charging current allowed by the battery.

7. The battery step charging test method according to any one of claims 1-2, characterized in that: The charging capacity of each charging stage is less than the rated capacity of the battery.

8. A battery step charging test device, characterized in that: include: A division module, used to divide the charging process into n charging stages according to the charging capacity of the battery; A charging module, configured to charge the first n-1 charging stages and then obtain a charging time for the nth charging stage according to the cut-off voltage; An adjustment module is used to determine the charging capacity and charging parameters of each charging stage based on the relationship between the charging time and the preset time; if the charging time exceeds the preset time, adjust the preset charging capacity and / or charging parameters of at least one of the first n-1 charging stages, and obtain the charging time of the nth charging stage again until the charging time is less than or equal to the preset time, thereby determining the charging capacity and charging parameters of each charging stage.

9. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the battery step charging test method according to any one of claims 1 to 7.

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