A battery early warning method, device, vehicle and storage medium

Abstract

Embodiments of the present application provide a battery early warning method, device, vehicle and storage medium, the method comprises: obtaining a reference ampere-hour integral value, the reference ampere-hour integral value is the ampere-hour integral value that can be normally used at the current time after the battery is lower than a preset state of charge threshold value; calculate the cumulative ampere-hour discharge capacity from the time when the state of charge of the battery is lower than the preset state of charge threshold value to the current time; when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, prevent battery overdischarge early warning is carried out. The present application can accurately calculate the cumulative ampere-hour discharge capacity of the battery discharge to the current time, and then compare the cumulative ampere-hour discharge capacity with the reference ampere-hour integral value of the protection battery, so as to judge whether the battery discharge is overdischarge, and timely early warning of the battery, avoid the problem of battery overdischarge, prevent the damage of battery, affect the use of battery, and effectively protect the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of battery, in particular to a battery early warning method, a battery early warning device, a vehicle and a computer storage medium. BACKGROUND

[0002] At present, the application of battery in electric vehicles, energy storage and the like is increasingly widespread, and the particularity of battery belongs to dangerous goods. Therefore, how to protect the battery is the technical problem to be solved at present.

[0003] In the prior art, the method for protecting the battery basically uses the battery SOC (State of Charge) to judge and then performs battery early warning protection. In the prior art, when the battery SOC is too low, the fixed time filtering is often used to judge whether the battery SOC is too low by continuously setting the time when the battery SOC is lower than the set SOC threshold.

[0004] The present application relates to the technical field of battery, in particular to a battery early warning method, a battery early warning device, a vehicle and a computer storage medium. SUMMARY

[0005] In view of the above problems, the present application is proposed to provide a battery early warning method, a battery early warning device, a vehicle and a computer readable storage medium which overcome the above problems or at least partially solve the above problems.

[0006] In order to solve the above problems, the present application discloses a battery early warning method, which comprises:

[0007] obtaining a reference ampere-hour integral value; the reference ampere-hour integral value is an ampere-hour integral value that can be normally used after the battery is lower than a preset state of charge threshold;

[0008] calculating the cumulative ampere-hour discharge capacity from the time when the state of charge of the battery is lower than the preset state of charge threshold to the current time;

[0009] when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, performing the battery over-discharge prevention early warning.

[0010] Optionally, the obtaining of the reference ampere-hour integral value comprises:

[0011] obtaining the initial reference ampere-hour integral value of the battery and the current battery health degree.

[0012] calculating the reference ampere-hour integral value according to the initial reference ampere-hour integral value and the current state of health of the battery.

[0013] Optionally, the initial reference ampere-hour integral value is determined by the following steps:

[0014] sampling the state of charge and the temperature state of the battery according to the preset period within a preset filtering time after the state of charge of the battery is lower than the preset state of charge threshold;

[0015] calculating the ampere-hour value corresponding to each preset period according to the state of charge and the temperature state sampled in each preset period, respectively;

[0016] accumulating the ampere-hour value corresponding to each preset period to obtain the initial reference ampere-hour integral value.

[0017] Optionally, the step of calculating the ampere-hour value corresponding to each preset period according to the state of charge and the temperature state sampled in each preset period, respectively, comprises:

[0018] determining the internal resistance state of the battery at the current time and the power state suffered by the battery at the current time according to the sampled state of charge and temperature state;

[0019] determining the historical open-circuit voltage value of the open-circuit voltage of the battery at the historical time corresponding to the previous preset period according to the sampled state of charge;

[0020] calculating the ampere-hour value corresponding to each preset period according to the power state, the internal resistance state and the historical open-circuit voltage value of each preset period, respectively.

[0021] Optionally, after the step of performing the battery over-discharge prevention warning when the accumulated ampere-hour discharge capacity value reaches the reference ampere-hour integral value, the method further comprises:

[0022] automatically shutting down the function of consuming the battery without affecting normal driving.

[0023] Optionally, after the step of performing the battery over-discharge prevention warning when the accumulated ampere-hour discharge capacity value reaches the reference ampere-hour integral value, the method further comprises:

[0024] automatically switching the battery used for power supply of the vehicle to a backup battery of the vehicle, wherein the backup battery is a normally usable battery.

[0025] Optionally, the step of performing the battery over-discharge prevention warning according to the accumulated ampere-hour discharge capacity of the battery when the accumulated ampere-hour discharge capacity value reaches the reference ampere-hour integral value comprises:

[0026] When the accumulated ampere-hour discharge capacity value reaches the reference ampere-hour integral value, a pre-warning message is pushed in at least one of voice, text, and short message.

[0027] The embodiments of the present application disclose a battery pre-warning device, which comprises:

[0028] The obtaining module is configured to obtain a reference ampere-hour integral value, wherein the reference ampere-hour integral value is an ampere-hour integral value that can be normally used after the battery is below a preset state of charge threshold.

[0029] The determining module is configured to calculate an accumulated ampere-hour discharge capacity from a time when the state of charge of the battery is below the preset state of charge threshold to a current time.

[0030] The pre-warning module is configured to perform a battery over-discharge pre-warning when the accumulated ampere-hour discharge capacity value reaches the reference ampere-hour integral value.

[0031] Optionally, the obtaining module comprises:

[0032] The obtaining submodule is configured to obtain an initial reference ampere-hour integral value of the battery and a current battery health degree.

[0033] The first calculating submodule is configured to calculate the reference ampere-hour integral value according to the initial reference ampere-hour integral value and the current battery health degree.

[0034] Optionally, the device further comprises:

[0035] The sampling module is configured to sample the state of charge and the temperature state of the battery according to the preset period within a preset filtering time after the state of charge of the battery is below the preset state of charge threshold.

[0036] The calculating module is configured to calculate an ampere-hour value corresponding to each preset period according to the state of charge and the temperature state sampled in each preset period.

[0037] The accumulating module is configured to accumulate the ampere-hour values corresponding to each preset period to obtain the initial reference ampere-hour integral value.

[0038] Optionally, the calculating module comprises:

[0039] The first determining submodule is configured to determine a current internal resistance state of the battery and a current power state to which the battery is subjected according to the sampled state of charge and the temperature state.

[0040] a second determining sub-module, configured to determine a historical open-circuit voltage value of the open-circuit voltage of the battery at a historical moment corresponding to a previous preset period according to the state of charge obtained by sampling;

[0041] a second calculating sub-module, configured to calculate an ampere-hour value corresponding to each of the preset periods respectively according to the power state, the internal resistance state and the historical open-circuit voltage value of each of the preset periods.

[0042] Optionally, the device further comprises:

[0043] an automatic closing module, configured to automatically close a function of consuming the battery without affecting normal driving.

[0044] Optionally, the device further comprises:

[0045] an automatic switching module, configured to automatically switch the battery used for power supply of the vehicle to a backup battery of the vehicle, wherein the backup battery is a normally usable battery.

[0046] Optionally, the early warning module comprises:

[0047] a pushing sub-module, configured to push an early warning message in at least one of a voice, a text and a short message when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value.

[0048] The application further discloses a vehicle comprising a memory, a processor and a computer program stored in the memory and capable of running on the processor, and the processor implements the steps of the battery early warning method when executing the computer program.

[0049] The application further discloses a computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program implements the steps of the battery early warning method when executed by a processor.

[0050] The application has the following advantages:

[0051] Compared with the prior art, the application does not determine the power state of the battery by using a set time, but determines whether the battery is over-discharged according to the relationship between the cumulative ampere-hour discharge capacity of the battery and the reference ampere-hour integral value detected in advance. The set time can only determine the time period of battery discharge, and cannot accurately know the actual total ampere-hour value in the set time. The application can accurately calculate the cumulative ampere-hour discharge capacity of the battery discharged to the current moment, compare the cumulative ampere-hour discharge capacity with the reference ampere-hour integral value for protecting the battery, and thus determine whether the battery is over-discharged, so that the battery can be early warned, the problem of over-discharge of the battery can be avoided, the battery can be prevented from being damaged due to over-discharge, and the battery is effectively protected. BRIEF DESCRIPTION OF DRAWINGS

[0052] Figure 1 is a step flow chart of a battery early warning method provided by an embodiment of the present application;

[0053] Figure 2 is a step flow chart of determining an initial reference ampere-hour integral value provided by an embodiment of the present application;

[0054] Figure 3 is a structural block diagram of a battery early warning device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0055] The above objects, features and advantages of the present application will become more apparent from the following detailed description considered in conjunction with the accompanying drawings.

[0056] In the prior art, the SOC of the battery is determined by time filtering, which cannot effectively prevent the battery from being over-discharged and causing damage to the battery. To solve the above technical problem, the present application provides a battery early warning method, the core idea of which is that, after the state of charge of the battery is lower than a preset state of charge threshold, the cumulative ampere-hour discharge capacity value of the battery and the reference ampere-hour integral value are used to prevent the battery from being over-discharged.

[0057] Referring to Figure 1 , a step flow chart of a battery early warning method provided by an embodiment of the present application is shown, which can specifically include the following steps:

[0058] Step 101, obtaining a reference ampere-hour integral value; the reference ampere-hour integral value is an ampere-hour integral value that can be normally used after the battery is lower than a preset state of charge threshold;

[0059] In an embodiment of the present application, when a user uses a vehicle or a battery, the state of charge of the vehicle or the battery is first detected, and when the state of charge of the battery reaches a preset state of charge threshold, a reference ampere-hour integral value that can be normally used when the state of charge of the battery is lower than the preset state of charge threshold is obtained. The reference ampere-hour integral value is the amount of electricity that can be normally discharged after the state of charge of the battery is lower than the preset state of charge threshold, i.e., discharging the amount of electricity will not cause over-discharge of the battery. The preset state of charge threshold and the preset filtering time are set according to the data provided by the battery cell manufacturer.

[0060] In an example, when the state of charge of the vehicle reaches the preset state of charge threshold, the initial reference ampere-hour integral value of the battery and the current battery health degree are first obtained, and then the reference ampere-hour integral value is calculated according to the initial reference ampere-hour integral value and the current battery health degree.

[0061] The initial reference ampere-hour integral value of the battery is determined by pre-detecting relevant parameters of the battery, and then processing and calculating the relevant parameters and relevant data according to the corresponding relationship between the relevant parameters provided by the battery cell manufacturer and the relevant data. The initial reference ampere-hour integral value is pre-detected and determined. When the battery state of charge is lower than the preset state of charge threshold, the reference ampere-hour integral value is determined according to the current battery health degree and the initial reference ampere-hour integral value, so as to ensure that the reference ampere-hour integral value is not affected by the aging of the battery. The battery health degree can be the percentage of the current actual capacity of the battery to the capacity of the battery when it leaves the factory, which can represent the aging degree of the battery. With the use of the battery, the actual capacity of the battery is lower, the aging degree of the battery is higher, and the battery health degree is also lower.

[0062] In the embodiment of the application, the health state of the battery can be detected periodically according to a preset time period, and the health state of the battery can also be detected each time the user uses the vehicle or the battery. The health state of the battery can also be detected when the state of charge of the battery reaches the preset state of charge threshold when the user uses the vehicle or the battery, so as to obtain the current battery health state of the battery. Then, the current battery health degree is calculated according to the current battery health state, and then the reference ampere-hour integral value is calculated according to the corresponding relationship between the current battery health degree and the initial reference ampere-hour integral value. The health state of the battery can be the current actual capacity of the battery, and the battery health degree can be the percentage of the current actual capacity of the battery to the capacity of the battery when it leaves the factory. Generally, the current battery health degree, the initial reference ampere-hour integral value and the reference ampere-hour integral value belong to a product relationship, and the reference ampere-hour integral value is obtained by multiplying the current battery health degree by the initial reference ampere-hour integral value. The specific relationship between the current battery health degree, the initial reference ampere-hour integral value and the reference ampere-hour integral value is not limited here and can be set according to the specific situation. Thus, it is ensured that the reference ampere-hour integral value is in the current state and is not affected by the aging of the battery, and the actual reference ampere-hour integral value of the battery is avoided to be affected by the aging of the battery.

[0063] In an example, the initial reference ampere-hour integral value is determined by the following steps:

[0064] As Figure 2 , a step flow chart for determining the initial reference ampere-hour integral value is shown, and the specific steps are as follows:

[0065] In step 201, the state of charge and temperature state of the battery are sampled according to the preset period within the preset filtering time after the state of charge of the battery is lower than the preset state of charge threshold.

[0066] The initial reference ampere-hour integral value of the battery can be determined when the battery is produced and has not yet been shipped or installed on a vehicle, or can be determined after the battery is installed on a vehicle, which is not limited in the application. The initial reference ampere-hour integral values of different models and different battery cell manufacturers can be different.

[0067] When the state of charge of the battery is lower than the preset state of charge threshold, a first-order battery model can be used, and the first-order battery model can be implemented using a single battery equivalent circuit and Simscape language. The state of charge and the temperature state of the battery within a preset filtering time are sampled according to a preset period of time, wherein the preset state of charge threshold and the preset filtering time are set according to the data provided by the battery cell manufacturer, and the data provided by different battery cell manufacturers can be different. The preset filtering time is the time during which the battery can be normally used after the state of charge of the battery is lower than the preset state of charge threshold. For example, the preset battery state of charge threshold is 10%, the preset filtering time is 10 minutes, and the preset period is 1 second. When the state of charge of the battery reaches 10%, the time during which the battery can be normally used is 10 minutes, and the state of charge and the temperature state of the battery are sampled every 1 second. The preset period can be determined according to the required precision, and the higher the calculation precision, the smaller the preset period. The time of the preset period is not limited herein.

[0068] In step 202, the ampere-hour value corresponding to each preset period is calculated according to the state of charge and the temperature state sampled in each preset period.

[0069] After sampling the state of charge and the temperature state of the battery according to the preset period, the state of charge and the temperature state of each period are obtained, and then the ampere-hour value corresponding to each preset period is calculated according to the state of charge and the temperature state of each period. The state of charge and the temperature state of each period can be the same or different, and therefore the ampere-hour value corresponding to each preset period can also be the same or different. For example, the preset filtering time is 10 minutes, and the preset period is 1 second. The state of charge and the temperature state of the battery are sampled every 1 second, and then there are 600 groups of data of the sampled state of charge and temperature state. Then, the ampere-hour value corresponding to each of the 600 preset periods is calculated according to the sampled state of charge and temperature state.

[0070] In an example, the internal resistance state of the battery at the current time and the power state of the battery at the current time are determined according to the state of charge and the temperature state obtained by sampling. The state of charge of the battery at the current time and the temperature state of the battery at the current time are obtained by sampling the battery at a preset period, and the internal resistance state of the battery at the current time and the power state of the battery at the current time are determined according to the correspondence between the state of charge at the current time and the temperature state at the current time and the internal resistance state at the current time, and the correspondence between the state of charge at the current time and the temperature state at the current time and the power state of the battery at the current time. Wherein, the correspondence between the state of charge at the current time and the temperature state at the current time and the internal resistance state at the current time, and the correspondence between the state of charge at the current time and the temperature state at the current time and the power state of the battery at the current time are provided by the battery cell manufacturer according to the corresponding relationship of different specifications of the battery. For example, the battery cell manufacturer provides the correspondence between the state of charge at the current time and the temperature state at the current time and the internal resistance state at the current time as shown in Table (1) below, and the correspondence between the state of charge at the current time and the temperature state at the current time and the power state of the battery at the current time as shown in Table (2) below:

[0071] Table (1)

[0072] 5％ 10％ 15％ 20％ 10℃ 1.115 KΩ 1.040 KΩ 0.983 KΩ 0.966 KΩ 25℃ 0.639 KΩ 0.615 KΩ 0.604 KΩ 0.575 KΩ

[0073] Table (2)

[0074] 5％ 10％ 15％ 20％ 10℃ 18 KW 24 KW 25 KW 25 KW 25℃ 23 KW 46 KW 54 KW 62 KW

[0075] If the state of charge of the battery at the current time is 10%, and the temperature state of the battery at the current time is 25℃, according to the corresponding relationship, the internal resistance state of the battery at the current time is 0.615KΩ, and the power state of the battery at the current time is 46KW.

[0076] According to the state of charge obtained by sampling, the historical open circuit voltage value of the open circuit voltage of the battery at the historical time corresponding to the last preset period is determined. The state of charge of the battery is obtained by sampling the battery at a preset period, and the historical open circuit voltage of the open circuit voltage of the battery at the historical time corresponding to the last preset period is determined according to the correspondence between the state of charge of the battery and the open circuit voltage value. Wherein, the correspondence between the state of charge of the battery and the open circuit voltage value is provided by the battery cell manufacturer according to the corresponding relationship of different specifications of the battery.

[0077] For example, if the preset period is 1 second, the state of charge and the temperature state of the battery are sampled every 1 second, and the state of charge and the temperature state of the battery at the 60th preset period are sampled at the 60th second. At this time, the current state of the battery is determined by the corresponding relationship between the state of charge and the temperature state of the battery at the 60th preset period and the current state of the battery and the current state of the power received by the battery at the current time. The state of the battery at the 59th preset period is sampled at the 59th second, that is, the state of charge at the 59th preset period is sampled. According to the corresponding relationship between the state of charge and the open circuit voltage value of the battery, the open circuit voltage value of the open circuit voltage of the battery at the 59th preset period is determined, that is, the historical open circuit voltage value of the open circuit voltage of the battery at the historical time corresponding to the previous preset period.

[0078] According to the power state of each preset period, the internal resistance state of the preset period, and the historical open circuit voltage value of the battery at the historical time corresponding to the previous preset period, the ampere-hour value corresponding to each preset period is calculated.

[0079] In an example, the current value of the battery at the current time is determined according to the power state, the internal resistance state, and the historical open circuit voltage value. After sampling the state of charge and the temperature state of the battery, the internal resistance state of the battery at the current time and the power state of the battery at the current time are determined, and the historical open circuit voltage value of the battery corresponding to the previous preset period is determined. According to the power state of the preset period at the current time, the internal resistance state at the current time, and the historical open circuit voltage value of the battery corresponding to the previous preset period, the ampere-hour value corresponding to each preset period is calculated, for example, the power state at the current time is P t , the internal resistance state at the current time is R t , and the historical open circuit voltage value of the battery corresponding to the previous preset period is U ocv，t-1 . In this embodiment, the current value I t of the battery at the current time in the current preset period can be calculated by formula (1).

[0080]

[0081] By simplifying formula (1), formula (2) can be obtained:

[0082] R t *I t 2 -U ocv，t-1 *I t +P t = 0 formula (2)

[0083] By solving formula (2), formula (3) can be obtained:

[0084]

[0085] Because the current value of the battery is positive, the above formula (3) is solved as formula (4):

[0086]

[0087] According to the current value of the battery at the current time of each preset period, the ampere-hour value corresponding to each preset period is calculated. After calculating the current value of the battery at the current time in the current period by the above formula (4), the current value of the battery at the current time of each preset period can be calculated, and then the ampere-hour value corresponding to each preset period is calculated according to the current value of each preset period. In this embodiment, the ampere-hour value corresponding to each preset period can be calculated by formula (5), where T is the time interval of the preset period, and Ah t is the ampere-hour value at the current time. For example, if the preset period is 1 second, T in formula (5) is 1S.

[0088] Ah t = I t* T formula (5)

[0089] Step 203, the ampere-hour values corresponding to each of the preset periods are accumulated to obtain the initial reference ampere-hour integral value.

[0090] After calculating the ampere-hour value corresponding to each preset period, the ampere-hour values corresponding to each preset period are accumulated, which can be calculated by formula (6) in this embodiment. The calculated value is the initial reference ampere-hour integral value, where Ah tol is the initial reference ampere-hour integral value.

[0091] Ah tol =∑Ah t formula (6)

[0092] Step 102, calculating the cumulative ampere-hour discharge capacity from the time when the state of charge of the battery is lower than the preset state of charge threshold to the current time;

[0093] When the state of charge of the battery is detected to reach the preset state of charge threshold, the detection and statistics of the ampere-hour discharge capacity of the battery are started, and the cumulative ampere-hour discharge capacity of the battery from when the state of charge is lower than the preset state of charge threshold to the current time is calculated according to the detected and statistical ampere-hour discharge capacity of the battery. The cumulative ampere-hour discharge capacity of the battery from when the state of charge is lower than the preset state of charge threshold to the current time can be obtained by accumulating the ampere-hour discharge capacities corresponding to respective preset statistical periods when the state of charge of the battery reaches the preset state of charge threshold.

[0094] Step 103: When the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, a battery overdischarge prevention warning is performed.

[0095] When the cumulative ampere-hour discharge capacity of the battery is detected to reach the obtained reference ampere-hour integral value, a battery overdischarge prevention warning is performed. The warning message can be pushed in at least one of a voice, a text, and a short message. When the user lends the vehicle to a friend or the vehicle is not nearby, if the cumulative discharge capacity of the battery of the vehicle reaches the reference ampere-hour integral value, the user can obtain the warning information through the short message push, and the user can remind the friend in time or charge the battery in time, so as to avoid damage to the battery due to overdischarge and protect the battery to prolong the use time of the battery.

[0096] In an example, when the cumulative ampere-hour discharge capacity value of the battery reaches the obtained reference ampere-hour integral value, the battery overdischarge prevention warning is performed, and the function of consuming the battery and not affecting normal driving can be automatically turned off, so as to reduce the overdischarge of the battery and automatically protect the battery. The function not affecting normal driving includes an air conditioning function, a player function, a seat heating function, and the like, which are not limited herein.

[0097] In an example, when the cumulative ampere-hour discharge capacity value of the battery reaches the obtained reference ampere-hour integral value, the battery overdischarge prevention warning is performed, and if the vehicle has a backup battery and the backup battery can be normally used at this time, the battery supplying power to the vehicle can be automatically switched to the backup battery, so as to avoid damage to the battery due to overdischarge and automatically protect the battery. For example, the vehicle carries not only one battery or one group of batteries, but also a backup battery. The backup battery and the battery being used exist in the same system or the same circuit. When the battery being used to supply power to the vehicle is switched to the backup battery, the normal use of the user is not affected. Specifically, the user does not have the feeling of switching the battery when switching, and can only know that the battery has been automatically switched through a switching prompt or a battery use indication, which does not affect the user experience of the battery.

[0098] In the above embodiment of the present application, instead of using the set time to judge the power state of the battery, whether the battery is over-discharged is judged according to the relationship between the cumulative ampere-hour discharge capacity of the battery and the reference ampere-hour integral value detected in advance, the specific ampere-hour value of the battery in each preset period can be accurately known through the cumulative ampere-hour discharge capacity, and the total ampere-hour value in the set time can only be judged through the set time, and the actual total ampere-hour value in the set time cannot be accurately known, therefore, the ampere-hour value of the battery discharge and the ampere-hour integral value for protecting the over-discharge of the battery can be accurately and clearly known by the present application, and the present application is not affected by the aging of the battery, the battery can be timely warned, the damage of the battery caused by over-discharge can be prevented, and the battery is effectively protected.

[0099] Reference Figure 3 The structure block diagram of the battery warning device provided by the embodiment of the present application is shown, and the device specifically comprises the following modules:

[0100] The acquisition module 301 is used for acquiring a reference ampere-hour integral value, and the reference ampere-hour integral value is an ampere-hour integral value that can be normally used after the battery is lower than a preset state of charge threshold value;

[0101] The determination module 302 is used for calculating a cumulative ampere-hour discharge capacity from the time when the state of charge of the battery is lower than the preset state of charge threshold value to the current time;

[0102] The warning module 303 is used for performing over-discharge prevention warning of the battery when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value.

[0103] In an embodiment of the present application, the acquisition module 301 comprises:

[0104] The acquisition submodule is used for acquiring an initial reference ampere-hour integral value of the battery;

[0105] The first calculation submodule is used for calculating the reference ampere-hour integral value according to the initial reference ampere-hour integral value and the current battery health degree.

[0106] In an embodiment of the present application, the device further comprises:

[0107] The sampling module is used for sampling the state of charge and the temperature state of the battery according to the preset period within a preset filtering time after the state of charge of the battery is lower than the preset state of charge threshold value;

[0108] The calculation module is used for calculating the ampere-hour value corresponding to each preset period according to the state of charge and the temperature state sampled in each preset period, respectively;

[0109] The accumulation module is used for accumulating the ampere-hour value corresponding to each preset period to obtain the initial reference ampere-hour integral value.

[0110] In an embodiment of the present application, the calculating module comprises:

[0111] a first determining sub-module, configured to determine, according to the state of charge and the state of temperature obtained by sampling, a state of internal resistance of the battery at the current moment and a state of power suffered by the battery at the current moment;

[0112] a second determining sub-module, configured to determine, according to the state of charge obtained by sampling, a historical open-circuit voltage value of the open-circuit voltage of the battery at a historical moment corresponding to the previous preset period;

[0113] a second calculating sub-module, configured to calculate, according to the state of power, the state of internal resistance and the historical open-circuit voltage value of each preset period, an ampere-hour value corresponding to each preset period.

[0114] In an embodiment of the present application, the second calculating sub-module comprises:

[0115] a determining unit, configured to determine, according to the state of power, the state of internal resistance and the historical open-circuit voltage value, a current value of the battery at the current moment;

[0116] a calculating unit, configured to calculate, according to the current value of the battery at the current moment of each preset period, an ampere-hour value corresponding to each preset period.

[0117] In an embodiment of the present application, the device further comprises:

[0118] an automatic closing module, configured to automatically close a function consuming the battery and not affecting normal driving.

[0119] In an embodiment of the present application, the device further comprises:

[0120] an automatic switching module, configured to automatically switch the battery used for power supply of the vehicle to a backup battery of the vehicle, wherein the backup battery is a normally usable battery.

[0121] In an embodiment of the present application, the early warning module comprises:

[0122] a pushing sub-module, configured to push a warning message in at least one of voice, text and short message when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value.

[0123] In the embodiment of the present application, instead of using the set time to judge the power state of the battery, the relationship between the accumulated ampere-hour discharge capacity of the battery and the reference ampere-hour integral value detected in advance is used to judge whether the battery is over-discharged, the accumulated ampere-hour discharge capacity can accurately know the specific ampere-hour value of the battery in each preset period, and the set time can only judge the time period of the battery discharge, and cannot accurately know the actual total ampere-hour value in the set time, therefore, the present application can accurately and clearly know the ampere-hour value of the battery discharge and the ampere-hour integral value of the battery over-discharge protection, and is not affected by the aging of the battery, timely warning the battery, preventing the battery from being damaged due to over-discharge, and effectively protecting the battery.

[0124] For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts refer to the part of the method embodiment.

[0125] The embodiment of the present application also provides a vehicle, which comprises:

[0126] The computer program is stored in the memory and can be run on the processor, and when the computer program is executed by the processor, each process of the above-mentioned battery warning method embodiment is realized, and the same technical effect can be achieved, and to avoid repetition, it will not be repeated here.

[0127] The embodiment of the present application also provides a computer readable storage medium, and the computer readable storage medium stores a computer program, and when the computer program is executed by the processor, each process of the above-mentioned battery warning method embodiment is realized, and the same technical effect can be achieved, and to avoid repetition, it will not be repeated here.

[0128] In the present specification, each embodiment mainly explains the difference from other embodiments, and the same and similar parts between each embodiment can be referred to each other.

[0129] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a device, or a computer program product. Therefore, the embodiments of the present application can adopt a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the embodiments of the present application can adopt the form of a computer program product implemented on one or more computer usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer usable program codes.

[0130] The embodiments of the present application are described with reference to the flowchart illustrations and / or block diagrams of the methods, terminal devices (systems) and computer program products according to the embodiments of the present application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal devices to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal devices, create means for implementing the functions specified in the flowchart illustrations and / or block diagrams. Figure 1 one or more of the flowcharts and / or block diagrams. Figure 1 one or more of the flowcharts and / or block diagrams.

[0131] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal devices to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the function specified in the flowcharts and / or block diagrams. Figure 1 one or more of the flowcharts and / or block diagrams. Figure 1 one or more of the flowcharts and / or block diagrams.

[0132] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal devices, such that a series of operational steps are performed on the computer or other programmable terminal devices to produce a computer implemented process so that the instructions which execute on the computer or other programmable terminal devices provide steps for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 one or more of the flowcharts and / or block diagrams. Figure 1 one or more of the flowcharts and / or block diagrams.

[0133] Although preferred embodiments of the present application have been described, those skilled in the art will be able to make additional modifications and variations to the described embodiments without departing from the inventive concepts disclosed in the present application. Accordingly, the appended claims are intended to cover all such modifications and variations as falling within the scope of the present application.

[0134] Finally, it is to be understood that the phraseology or terminology such as "first" and "second" etc. used herein is merely intended to differentiate one entity or operation from another entity or operation, without necessarily requiring or implying any actual such relationship or order between such entities or operations. Moreover, the terms "comprising", "including", or any other closure, are intended to cover the non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include those elements alone but can include other elements not expressly listed or even include elements inherent in such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus including the element.

[0135] The above describes in detail the battery early warning method and the battery early warning device provided by the present application. The principles and implementation manners of the present application are described by using specific examples. The above description of the examples is only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges will be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A battery early warning method, characterized in that, include: Obtain the reference ampere-hour integral value; The reference ampere-hour integral value is the ampere-hour integral value that allows the battery to be used normally after it falls below a preset state of charge threshold. Calculate the cumulative ampere-hour discharge capacity from the moment when the battery's state of charge is lower than the preset state of charge threshold to the current moment; When the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, an over-discharge warning is issued to prevent battery over-discharge.

2. The method according to claim 1, characterized in that, The process of obtaining the reference ampere-hour integral value includes: Obtain the initial reference ampere-hour integral value and the current battery health of the battery; The reference ampere-hour integral value is calculated based on the initial reference ampere-hour integral value and the current battery health.

3. The method according to claim 2, characterized in that, The initial reference ampere-hour integral value is determined through the following steps: Within a preset filtering time after the state of charge of the battery falls below the preset state of charge threshold, the state of charge and temperature of the battery are sampled according to a preset period. Based on the state of charge and the temperature state obtained from sampling at each preset period, calculate the ampere-hour value corresponding to each preset period; The ampere-hour values ​​corresponding to each preset period are summed to obtain the initial reference ampere-hour integral value.

4. The method according to claim 3, characterized in that, The step of calculating the ampere-hour value corresponding to each preset period based on the state of charge and the temperature state obtained from sampling at each preset period includes: Based on the sampled state of charge and temperature, determine the current internal resistance state of the battery and the current power state of the battery. Based on the sampled state of charge, determine the historical open-circuit voltage value of the battery at the historical moment corresponding to the previous preset period; Based on the power state, internal resistance state, and historical open-circuit voltage value of each preset period, the ampere-hour value corresponding to each preset period is calculated.

5. The method according to claim 1, characterized in that, After issuing a warning to prevent battery over-discharge when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, the method further includes: Automatically disable functions that consume the battery without affecting normal driving.

6. The method according to claim 1, characterized in that, After issuing a warning to prevent battery over-discharge when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, the method further includes: The battery used to power the vehicle will be automatically switched to the vehicle's backup battery, which is a working battery.

7. The method according to claim 1, characterized in that, The step of issuing a warning to prevent battery over-discharge when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value includes: When the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value, a warning message will be pushed out in at least one of the following ways: voice, text, or SMS.

8. A battery warning device, characterized in that, The device includes: The acquisition module is used to acquire a reference ampere-hour integral value; the reference ampere-hour integral value is the ampere-hour integral value that allows the battery to be used normally after it is below a preset state of charge threshold. The determination module is used to calculate the cumulative ampere-hour discharge capacity from the moment when the state of charge of the battery is lower than the preset state of charge threshold to the current moment; The early warning module is used to issue an early warning to prevent battery over-discharge when the cumulative ampere-hour discharge capacity value reaches the reference ampere-hour integral value.

9. A vehicle, characterized in that, include: A processor, a memory, and a computer program stored in the memory and capable of running on the processor, wherein the computer program, when executed by the processor, implements the steps of the battery warning method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, A computer program is stored on the computer-readable storage medium, which, when executed by a processor, implements the steps of the battery warning method as described in any one of claims 1-7.

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