CN116861133A

CN116861133A - Calculation method and device for static average current of low-voltage lithium battery

Info

Publication number: CN116861133A
Application number: CN202310638174.XA
Authority: CN
Inventors: 詹祖焱; 辛龙威; 陈浩
Original assignee: Eve Energy Co Ltd
Current assignee: Eve Energy Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-10-10

Abstract

The invention discloses a method and a device for calculating static average current of a low-voltage lithium battery, wherein the method comprises the following steps: after receiving a dormancy instruction issued by the whole vehicle, determining the current state of the low-voltage lithium battery; determining the type of the received action issued by the whole vehicle; and determining the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle. Therefore, the accuracy of the static average current calculation result of the low-voltage lithium battery during the dormancy period of the whole vehicle can be improved, so that the accuracy of calculating the power consumption of the whole vehicle during the dormancy period is improved, and the battery is ensured to have sufficient electric quantity to be started successfully.

Description

Calculation method and device for static average current of low-voltage lithium battery

Technical Field

The invention relates to the technical field of batteries, in particular to a method and a device for calculating static average current of a low-voltage lithium battery.

Background

With the rapid development of intelligent automobiles, the whole automobile lithium battery system does not need to provide starting current for an engine, and mainly provides power for a low-voltage system in a power OFF mode, namely, provides power for each controller when the whole automobile is dormant. Because the intelligent automobile has more low-voltage modules and devices, the static power consumption of the intelligent automobile is generally larger than that of the traditional fuel oil automobile, if the lithium battery is deficient for a long time, the intelligent automobile can not be started normally, and therefore the power consumption of the whole automobile during the dormancy period needs to be calculated accurately.

At present, most low-voltage lithium battery manufacturers only calculate the average current of the low-voltage lithium battery in the dormancy period of the whole vehicle when calculating the static average current of the low-voltage lithium battery in the dormancy period of the whole vehicle, but the dormancy of the whole vehicle and the low-voltage lithium battery is not completely synchronous, so that the problem of larger error between the calculation result and the power consumption of the actual whole vehicle in the dormancy period is caused. Therefore, it is important to provide a technical scheme for accurately calculating the static average current of the low-voltage lithium battery during the whole vehicle dormancy period.

Disclosure of Invention

The invention provides a method and a device for calculating the static average current of a low-voltage lithium battery, which can improve the accuracy of the calculation result of the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the dormancy period and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully.

In order to solve the technical problem, the first aspect of the invention discloses a method for calculating the static average current of a low-voltage lithium battery, which comprises the following steps:

after receiving a dormancy instruction issued by the whole vehicle, determining the current state of the low-voltage lithium battery, wherein the current state comprises a dormancy state or a non-dormancy state;

Determining the type of the received action issued by the whole vehicle, wherein the type of the action issued by the whole vehicle comprises an issued awakening instruction or an undelivered awakening instruction;

and determining the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle.

In a first aspect of the present invention, the determining, according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle, the static average current of the low-voltage lithium battery during the rest period of the whole vehicle includes:

when the current state of the low-voltage lithium battery is the non-dormant state and the type of the received action issued by the whole vehicle is the issued wake-up instruction, calculating a first duration from the time when the low-voltage lithium battery receives the dormant instruction issued by the whole vehicle to the time when the wake-up instruction issued by the whole vehicle is received, and calculating a first power value consumed by the low-voltage lithium battery within the first duration;

and calculating the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the first duration and the first electric quantity value.

As an alternative embodiment, in the first aspect of the present invention, the method further includes:

when the current state of the low-voltage lithium battery is the dormant state and the type of the received action issued by the whole vehicle is the issued wake-up instruction, calculating a second time length from the time of receiving the dormant instruction issued by the whole vehicle to the time of entering the dormant state for the first time, and calculating a second electric quantity value consumed by the low-voltage lithium battery within the second time length;

calculating a third duration from the first time of entering the sleep state to the time of receiving a wake-up instruction issued by the whole vehicle, and calculating a third electricity value consumed by the low-voltage lithium battery in the third duration;

and calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time length, the second electric quantity value, the third time length and the third electric quantity value.

when the current state of the low-voltage lithium battery is the dormant state and the received action type issued by the whole vehicle is the non-issued wake-up instruction, judging whether the low-voltage lithium battery is self-awakened;

When the low-voltage lithium battery is judged to be self-awakened, calculating a fourth time length from the first time of entering the sleep state to the self-awakening of the low-voltage lithium battery, and calculating a fourth electric quantity value consumed by the low-voltage lithium battery in the fourth time length;

judging whether the low-voltage lithium battery synchronously sends out a message to wake up the whole vehicle;

when the low-voltage lithium battery synchronous outgoing message is judged to wake up the whole vehicle, calculating the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the second time length, the second electric quantity value, the fourth time length and the fourth electric quantity value.

when judging that the low-voltage lithium battery does not synchronously send out a message to wake up the whole vehicle, and when the current state of the low-voltage lithium battery is the dormant state and the type of the received action issued by the whole vehicle is the wake-up issuing instruction, calculating a fifth time length from self-wake-up to second sleep state entering of the low-voltage lithium battery, and calculating a fifth current value consumed by the low-voltage lithium battery in the fifth time length;

Calculating a sixth duration from the second time of entering the sleep state to the time of receiving a wake-up instruction issued by the whole vehicle, and calculating a sixth electric quantity value consumed by the low-voltage lithium battery in the sixth duration;

and calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time, the second electric quantity value, the fourth time, the fourth electric quantity value, the fifth time, the fifth electric quantity value, the sixth time and the sixth electric quantity value.

when judging that the low-voltage lithium battery does not synchronously send out a message to wake up the whole vehicle, wherein the current state of the low-voltage lithium battery is the non-dormant state, and the received type of action issued by the whole vehicle is the issued wake-up instruction, calculating a seventh time length from the occurrence of self-wake-up to the reception of the wake-up instruction issued by the whole vehicle by the low-voltage lithium battery, and calculating a seventh current value consumed by the low-voltage lithium battery in the seventh time length;

and calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time length, the second electric quantity value, the fourth time length, the fourth electric quantity value, the seventh time length and the seventh electric quantity value.

judging whether the static average current of the low-voltage lithium battery is higher than a preset static current threshold value or not during the dormancy period of the whole vehicle;

and outputting a battery power shortage early warning when judging that the static average current of the low-voltage lithium battery is higher than a preset static current threshold value in the dormant period of the whole vehicle, wherein the battery power shortage early warning is used for prompting that the low-voltage lithium battery is about to be power shortage.

The invention discloses a calculating device of static average current of a low-voltage lithium battery in a second aspect, which is characterized by comprising a communication module, a first determining module, a second determining module and a third determining module, wherein:

the communication module is used for receiving a dormancy instruction issued by the whole vehicle;

the first determining module is used for determining the current state of the low-voltage lithium battery after the communication module receives the dormancy instruction issued by the whole vehicle, wherein the current state comprises a dormancy state or a non-dormancy state;

the communication module is also used for receiving the action issued by the whole vehicle;

the second determining module is configured to determine a type of an action issued by the whole vehicle, where the type of the action issued by the whole vehicle includes an issued wake-up instruction or an undelivered wake-up instruction;

The third determining module is configured to determine a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the current state of the low-voltage lithium battery and a type of the action issued by the whole vehicle.

As an alternative embodiment, in the second aspect of the present invention, the third determining module includes a calculating sub-module, wherein:

the computing sub-module is configured to calculate a first duration from when the first determining module determines that the current state of the low-voltage lithium battery is the non-sleep state and the second determining module determines that the type of the action issued by the whole vehicle is the issue wake-up instruction, where the first duration is from when the low-voltage lithium battery receives the sleep instruction issued by the whole vehicle to when the low-voltage lithium battery receives the wake-up instruction issued by the whole vehicle;

the calculating submodule is further used for calculating a first electric quantity value consumed by the low-voltage lithium battery in the first duration;

and the calculation submodule is also used for calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the first duration and the first electric quantity value.

As an alternative embodiment, in the second aspect of the present invention, wherein:

The calculating submodule is further used for calculating a second time length from receiving the sleep instruction issued by the whole vehicle to entering the sleep state for the first time when the first determining module determines that the current state of the low-voltage lithium battery is the sleep state and the second determining module determines that the type of action issued by the whole vehicle is the issue wakeup instruction;

the calculating submodule is further used for calculating a second electric quantity value consumed by the low-voltage lithium battery in the second duration;

the calculation submodule is further used for calculating a third duration from the first time of entering the sleep state to the time of receiving a wake-up instruction issued by the whole vehicle;

the calculating submodule is further used for calculating a third electric quantity value consumed by the low-voltage lithium battery in the third duration;

and the calculation submodule is further used for calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second duration, the second electric quantity value, the third duration and the third electric quantity value.

As an optional implementation manner, in the second aspect of the present invention, the third determining module further includes a first judging sub-module and a second judging sub-module, where:

The first judging sub-module is used for judging whether the low-voltage lithium battery is self-awakened or not when the first determining module determines that the current state of the low-voltage lithium battery is the dormant state and the second determining module determines that the type of action issued by the whole vehicle is the non-issued awakening instruction;

the calculating submodule is further used for calculating a fourth time length from the first time of entering the sleep state to the self-awakening of the low-voltage lithium battery when the first judging submodule judges that the self-awakening of the low-voltage lithium battery occurs;

the calculating submodule is further used for calculating a fourth electric quantity value consumed by the low-voltage lithium battery in the fourth duration;

the second judging submodule is used for judging whether the low-voltage lithium battery synchronously sends out a message to wake up the whole vehicle;

the calculating submodule is further configured to calculate a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the second duration, the second electric quantity value, the fourth duration and the fourth electric quantity value when the second judging submodule judges that the low-voltage lithium battery synchronously sends a message to wake up the whole vehicle.

the calculating submodule is further configured to calculate a fifth duration from when the second judging submodule judges that the low-voltage lithium battery is not synchronously sending a message to wake up the whole vehicle, when the first determining module determines that the current state of the low-voltage lithium battery is the sleep state, and when the second determining module determines that the type of the action issued by the whole vehicle is the issue of the wake-up instruction, the low-voltage lithium battery is self-awakened to enter the sleep state for the second time;

the calculating submodule is further used for calculating a fifth current value consumed by the low-voltage lithium battery in the fifth time period;

the calculation submodule is further used for calculating a sixth time length from the second time of entering the sleep state of the low-voltage lithium battery to the time of receiving a wake-up instruction issued by the whole vehicle;

the calculating submodule is further used for calculating a sixth electric quantity value consumed by the low-voltage lithium battery in the sixth duration;

the calculating submodule is further configured to calculate a static average current of the low-voltage lithium battery of the whole vehicle during the sleep period according to the second duration, the second electric quantity value, the fourth duration, the fourth electric quantity value, the fifth duration, the fifth electric quantity value, the sixth duration, and the sixth electric quantity value.

the calculating submodule is further configured to calculate a seventh duration from when the second judging submodule judges that the low-voltage lithium battery is not synchronously sent out to wake up the whole vehicle, when the first determining module determines that the current state of the low-voltage lithium battery is the non-sleep state and when the second determining module determines that the type of the action issued by the whole vehicle is the issue wake-up instruction, the wake-up instruction issued by the whole vehicle is received by the low-voltage lithium battery;

the calculating submodule is further used for calculating a seventh current value consumed by the low-voltage lithium battery in the seventh time period;

the calculating submodule is further used for calculating the static average current of the low-voltage lithium battery of the whole vehicle during the dormancy period according to the second time length, the second electric quantity value, the fourth time length, the fourth electric quantity value, the seventh time length and the seventh electric quantity value.

In a second aspect of the present invention, as an optional implementation manner, the apparatus further includes a judging module, and an output module, where:

the judging module is used for judging whether the static average current of the low-voltage lithium battery is higher than a preset static current threshold value or not during the dormancy period of the whole vehicle;

The output module is used for outputting battery power shortage early warning when the judging module judges that the static average current of the low-voltage lithium battery is higher than a preset static current threshold value in the period of dormancy of the whole vehicle, and the battery power shortage early warning is used for prompting that the low-voltage lithium battery is about to be power shortage.

In a third aspect, the present invention discloses another apparatus for calculating a static average current of a low-voltage lithium battery, the apparatus comprising:

a memory storing executable program code;

a processor coupled to the memory;

the processor invokes the executable program code stored in the memory to perform the method of calculating the static average current of a low voltage lithium battery as claimed in any one of claims 1-7.

A fourth aspect of the invention discloses a computer storage medium storing computer instructions which, when called, are adapted to perform a method of calculating the static average current of a low voltage lithium battery as claimed in any one of claims 1-7.

Compared with the prior art, the embodiment of the invention has the following beneficial effects:

in the embodiment of the invention, after receiving a dormancy instruction issued by the whole vehicle, the current state of the low-voltage lithium battery is determined; determining the type of the received action issued by the whole vehicle; and determining the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle. Therefore, the invention considers the situation that the sleeping time of the whole vehicle and the sleeping time of the low-voltage lithium battery are not synchronous, and can improve the accuracy of the calculation result of the static average current of the low-voltage lithium battery during the sleeping period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the sleeping period and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a method for calculating a static average current of a low-voltage lithium battery according to an embodiment of the present invention;

fig. 2 is a flowchart of another method for calculating a static average current of a low-voltage lithium battery according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a device for calculating a static average current of a low-voltage lithium battery according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another apparatus for calculating static average current of a low-voltage lithium battery according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a computing device for static average current of a low-voltage lithium battery according to another embodiment of the present invention.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or article that comprises a list of steps or elements is not limited to only those listed steps or elements but may alternatively include other steps or elements not listed or inherent to such process, method, article, or article.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The invention discloses a method and a device for calculating the static average current of a low-voltage lithium battery, which can improve the accuracy of the calculation result of the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the dormancy period and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully. The following will describe in detail.

Example 1

Referring to fig. 1, fig. 1 is a flow chart of a method for calculating a quiescent current of a low-voltage lithium battery according to an embodiment of the invention. The method for calculating the quiescent current of the low-voltage lithium battery described in fig. 1 can be applied to a battery management device which needs to calculate the low-voltage lithium battery during the sleep period of the whole vehicle, wherein the battery management device comprises one of a battery management system, a battery management device and a battery management server, and the battery management server comprises a local server or a cloud server. As shown in fig. 1, the method for calculating the quiescent current of the low-voltage lithium battery may include the following operations:

101. and after receiving a dormancy instruction issued by the whole vehicle, determining the current state of the low-voltage lithium battery.

In the embodiment of the present invention, the current state may include a dormant state or a non-dormant state.

102. And determining the type of the received action issued by the whole vehicle.

In the embodiment of the invention, the type of the action issued by the whole vehicle can comprise an issued wake-up instruction or a non-issued wake-up instruction.

103. And determining the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle.

In the embodiment of the invention, the static average current of the low-voltage lithium battery can be understood as the average current consumed from the time when the whole vehicle issues a sleep instruction (no message in the whole vehicle) to the time when the whole vehicle wakes up next time (the message in the whole vehicle).

Therefore, the method for calculating the static average current of the low-voltage lithium battery described in fig. 1 considers the situation that the rest time of the whole vehicle and the low-voltage lithium battery is not synchronous, and can improve the accuracy of the result of calculating the static average current of the low-voltage lithium battery during the rest period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the rest period, and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully.

In an embodiment of the present invention, as an optional implementation manner, determining a static average current of the low-voltage lithium battery during a whole vehicle sleep period according to a current state of the low-voltage lithium battery and a type of an action issued by the whole vehicle may include:

when the current state of the low-voltage lithium battery is a non-dormant state and the type of the received action issued by the whole vehicle is an issued wake-up instruction, calculating a first duration from the time when the low-voltage lithium battery receives the dormant instruction issued by the whole vehicle to the time when the wake-up instruction issued by the whole vehicle is received, and calculating a first electricity value consumed by the low-voltage lithium battery within the first duration;

And calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormant period according to the first duration and the first electric quantity value.

In the embodiment of the invention, the method for calculating the first electric quantity value consumed by the low-voltage lithium battery in the first time length can be as follows: exemplary, for example, may be obtained by adding up the power consumed by the low-voltage lithium battery during each operation period in the first period: if the first duration from the time when the sleep command issued by the whole vehicle is received to the time when the wake command issued by the whole vehicle is received is 10 seconds, 2A is consumed by the low-voltage lithium battery in the first second, 5A is consumed in the second, 8A is consumed in the 3 rd second, and 1A is consumed by the low-voltage lithium battery every second in the following 7 seconds, then the first electric quantity value of the low-voltage lithium battery consumption in the 10 seconds is= (2 x 1+5 x 1+8 x 1+3 x 7)/3600=0.01 (AH); further, the static average current of the low-voltage lithium battery=the first electric quantity value/the first duration=0.01 AH/10s=3.6 (a) during the sleep period of the whole vehicle.

Therefore, by combining the interval duration between the low-voltage lithium battery receiving the sleep command and the wake command issued by the whole vehicle and the consumed electric quantity value of the low-voltage lithium battery in the interval duration, the embodiment of the invention can accurately calculate the static average current of the low-voltage lithium battery under the condition that the low-voltage lithium battery is always in a non-sleep state during the whole vehicle sleep period.

In an alternative embodiment, the method for calculating the quiescent current of the low-voltage lithium battery may further include:

when the current state of the low-voltage lithium battery is a dormant state and the type of the received action issued by the whole vehicle is an issued wake-up instruction, calculating a second time length from the time of receiving the dormant instruction issued by the whole vehicle to the time of entering the dormant state for the first time, and calculating a second electricity value consumed by the low-voltage lithium battery within the second time length;

In the embodiment of the invention, the method for calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time length, the second electric quantity value, the third time length and the third electric quantity value comprises the following steps: the sum of the second electric quantity value and the third electric quantity value is divided by the sum of the second time length and the third time length; for example, if the second duration is 10S, the third duration is 5S, the second electric power value is 3.6AH, and the third electric power value is 2.4AH are calculated respectively, the static average current of the low-voltage lithium battery in the whole vehicle during sleep is= (3.6ah+2.4ah)/(10s+5s) =4 (a).

Therefore, by combining the interval time between the low-voltage lithium battery receiving the sleep instruction issued by the whole vehicle and the low-voltage lithium battery entering the sleep state, the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the low-voltage lithium battery entering the sleep state and the wake-up instruction issued by the whole vehicle and the electricity consumption value of the low-voltage lithium battery in the interval time, the embodiment of the invention can accurately calculate the static average current of the low-voltage lithium battery when the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep instruction and the wake-up instruction issued by the whole vehicle is received when the low-voltage lithium battery is in the sleep state.

In another alternative embodiment, the method for calculating the quiescent current of the low-voltage lithium battery may further include:

when the current state of the low-voltage lithium battery is a dormant state and the type of the received action issued by the whole vehicle is a non-issued wake-up instruction, judging whether the low-voltage lithium battery is self-awakened;

when the low-voltage lithium battery is judged to be self-awakened, calculating a fourth time length from the first time of entering the sleep state to the self-awakening of the low-voltage lithium battery, and calculating a fourth electricity value consumed by the low-voltage lithium battery in the fourth time length;

when the synchronous outgoing message of the low-voltage lithium battery is judged to wake up the whole vehicle, calculating the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the second time length, the second electric quantity value, the fourth time length and the fourth electric quantity value.

In the embodiment of the invention, the method for calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time length, the second electric quantity value, the fourth time length and the fourth electric quantity value comprises the following steps: the sum of the second electric quantity value and the fourth electric quantity value is divided by the sum of the second time length and the fourth time length; for example, if the second duration is 10S, the fourth duration is 10S, the second power value is 3.6AH, and the fourth power value is 3.0AH are calculated respectively, the static average current of the low-voltage lithium battery in the whole vehicle during sleep period= (3.6ah+3.0ah)/(10s+10s) =3.3 (a).

Therefore, by combining the interval time between the low-voltage lithium battery receiving the sleep instruction issued by the whole vehicle and the low-voltage lithium battery entering the sleep state, the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the low-voltage lithium battery entering the sleep state and the low-voltage lithium battery self-awakening and synchronous external message awakening, and the electricity consumption value of the low-voltage lithium battery in the interval time, the embodiment of the invention can accurately calculate the static average current of the low-voltage lithium battery when the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep instruction and the low-voltage lithium battery enters the sleep state after working for a period of time and is in the sleep state, and the low-voltage lithium battery self-awakens under the condition of the whole vehicle when the self-awakening and the external message awakens.

In yet another alternative embodiment, the method for calculating the quiescent current of the low-voltage lithium battery may further include:

when judging that the low-voltage lithium battery does not synchronously send out a message to wake up the whole vehicle, and when the current state of the low-voltage lithium battery is a dormant state and the type of the received action issued by the whole vehicle is a wake-up issuing instruction, calculating a fifth time length from self-wake-up to second sleep state entering of the low-voltage lithium battery, and calculating a fifth current value consumed by the low-voltage lithium battery within the fifth time length;

calculating a sixth duration from the second time of entering the sleep state to the time of receiving a wake-up instruction issued by the whole vehicle, and calculating a sixth electricity value consumed by the low-voltage lithium battery in the sixth duration;

and calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time period, the second electric quantity value, the fourth time period, the fourth electric quantity value, the fifth time period, the fifth electric quantity value, the sixth time period and the sixth electric quantity value.

In the embodiment of the invention, the method for calculating the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period according to the second time length, the second electric quantity value, the fourth electric quantity value, the fifth time length, the fifth electric quantity value, the sixth time length and the sixth electric quantity value comprises the following steps: the sum of the second electric quantity value, the fourth electric quantity value, the fifth electric quantity value and the sixth electric quantity value is divided by the sum of the second time period, the fourth time period, the fifth time period and the sixth time period; for example, if the second duration is 10S, the fourth duration is 10S, the fifth duration is 5S, the sixth duration is 5S, the second electric quantity value is 3.6AH, the fourth electric quantity value is 3.0AH, the fifth electric quantity value is 2.4AH, and the sixth electric quantity value is 3.0AH are calculated respectively, the static average current of the low-voltage lithium battery in the rest period of the whole vehicle= (3.6ah+3.0ah+2.4ah+3.0ah)/(10s+10s+5s+5s) =4 (a).

Therefore, by combining the interval time between the low-voltage lithium battery receiving the sleep command issued by the whole vehicle and the low-voltage lithium battery entering the sleep state and the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the low-voltage lithium battery entering the sleep state and the low-voltage lithium battery self-waking but not synchronously sending out messages to wake the whole vehicle and the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the low-voltage lithium battery self-waking and the reentry of the sleep state and the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the low-voltage lithium battery reentry of the sleep state and the reception of the wake-up command issued by the whole vehicle and the electricity consumption value of the low-voltage lithium battery in the interval time, the average current of the low-voltage lithium battery can be accurately calculated when the whole vehicle enters the sleep state after the whole vehicle sends the sleep command, the low-voltage lithium battery self-waking but not sending out the whole vehicle when the whole vehicle is in the sleep state, and the low-voltage lithium battery is in the wake-state again after the whole vehicle enters the sleep state.

When the fact that the low-voltage lithium battery does not synchronously send out a message to wake up the whole vehicle, the current state of the low-voltage lithium battery is a non-dormant state, and the received type of action issued by the whole vehicle is a wake-up instruction is judged, calculating a seventh time length from the occurrence of self-wake-up of the low-voltage lithium battery to the receipt of the wake-up instruction issued by the whole vehicle, and calculating a seventh current value consumed by the low-voltage lithium battery within the seventh time length;

In the embodiment of the invention, according to the second time length, the second electric quantity value, the fourth time length, the fourth electric quantity value, the seventh time length and the seventh electric quantity value, the static average current of the low-voltage lithium battery of the whole vehicle in the dormancy period is calculated as follows: the sum of the second electric quantity value, the fourth electric quantity value and the seventh electric quantity value is divided by the sum of the second time period, the fourth time period and the seventh time period; for example, if the second duration is 10S, the fourth duration is 10S, the seventh duration is 5S, the second electric power value is 3.6AH, the fourth electric power value is 3.0AH, and the seventh electric power value is 2.4AH are calculated respectively, the static average current of the low-voltage lithium battery in the whole vehicle during sleep period= (3.6ah+3.0ah+2.4ah)/(10s+10s+5s) =3.6 (a).

Therefore, by combining the interval time between the low-voltage lithium battery receiving the sleep instruction issued by the whole vehicle and the sleep state of the low-voltage lithium battery, the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the low-voltage lithium battery and the self-wake-up but not synchronous external message of the low-voltage lithium battery to wake up the whole vehicle, the electricity consumption value of the low-voltage lithium battery in the interval time, the interval time between the self-wake-up and the wake-up instruction issued by the whole vehicle and the electricity consumption value of the low-voltage lithium battery in the interval time, the static average current of the low-voltage lithium battery can be accurately calculated when the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep instruction and the whole vehicle is in the sleep state after the low-voltage lithium battery is in the sleep state but the self-wake-up but not synchronous external message is not sent, but the low-voltage lithium battery is in the sleep state again after the self-wake-up.

Example two

Referring to fig. 2, fig. 2 is a flow chart of a method for calculating a quiescent current of a low-voltage lithium battery according to an embodiment of the invention. The method for calculating the quiescent current of the low-voltage lithium battery described in fig. 2 can be applied to a battery management device which needs to calculate the low-voltage lithium battery during the sleep period of the whole vehicle, wherein the battery management device comprises one of a battery management system, a battery management device and a battery management server, and the battery management server comprises a local server or a cloud server. As shown in fig. 2, the method for calculating the quiescent current of the low-voltage lithium battery may include the following operations:

201. And after receiving a dormancy instruction issued by the whole vehicle, determining the current state of the low-voltage lithium battery.

202. And determining the type of the received action issued by the whole vehicle.

203. And determining the static average current of the low-voltage lithium battery during the dormancy period of the whole vehicle according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle.

In the embodiment of the present invention, step 201 to step 203 are described in detail with reference to embodiment 1 to step 103, and the description of the embodiment of the present invention is omitted.

204. Judging whether the static average current of the low-voltage lithium battery of the whole vehicle is higher than a preset static current threshold value in the dormancy period, and triggering and executing step 205 when the judgment result of step 204 is yes; when the result of the determination in step 204 is no, the execution of step 203 is triggered.

205. And outputting the early warning of the power shortage of the battery.

In the embodiment of the invention, the power shortage early warning is used for prompting that the low-voltage lithium battery is short of power, the power shortage early warning can be sent to a battery management system of the low-voltage lithium battery, and prompt information can be output to at least one of a user terminal, a vehicle control APP and a charging APP through a mobile network, and further, the user terminal can comprise at least one of a personal computer, a notebook computer, a smart phone, a tablet personal computer, portable wearable equipment and other personal terminals.

Therefore, the implementation of the method for calculating the static average current of the low-voltage lithium battery described in fig. 2 considers the situation that the rest time of the whole vehicle and the low-voltage lithium battery is not synchronous, and can improve the accuracy of the result of calculating the static average current of the low-voltage lithium battery during the rest period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the rest period, and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully; the prompt information can be timely output when the low-voltage lithium battery is deficient, so that a battery management system or a user can timely respond to the prompt information, and the problem that a vehicle cannot be started due to the low-voltage lithium battery is avoided.

Example III

Referring to fig. 3, fig. 2 is a schematic structural diagram of a low-voltage lithium battery quiescent current computing device according to an embodiment of the invention. As shown in fig. 3, the calculating device for the low-voltage lithium battery quiescent current may include a communication module 301, a first determining module 302, a second determining module 303, and a third determining module 304, where:

the communication module 301 is configured to receive a sleep instruction issued by the whole vehicle;

the first determining module 302 is configured to determine a current state of the low-voltage lithium battery after the communication module 301 receives a sleep instruction issued by the whole vehicle.

The communication module 301 is further configured to receive an action issued by the whole vehicle.

A second determining module 303, configured to determine a type of action issued by the whole vehicle.

The third determining module 304 is configured to determine a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the current state of the low-voltage lithium battery and the type of the action issued by the whole vehicle.

In the embodiment of the invention, the current state may include a sleep state or a non-sleep state, and the type of the action issued by the whole vehicle may include an issued wake-up instruction or an undelivered wake-up instruction.

Therefore, the calculating device for the static average current of the low-voltage lithium battery described in fig. 3 considers the situation that the rest time of the whole vehicle and the low-voltage lithium battery is not synchronous, and can improve the accuracy of the result of calculating the static average current of the low-voltage lithium battery during the rest period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the rest period, and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully.

In an alternative embodiment, the third determination submodule 304 may include a calculation submodule 3041. At this time, the device for calculating the quiescent current of the low-voltage lithium battery may be shown in fig. 4, and fig. 4 is a schematic structural diagram of another device for calculating the quiescent current of the low-voltage lithium battery according to the embodiment of the present invention, where:

The calculating submodule 3041 is configured to calculate a first duration from when the first determining module 302 determines that the current state of the low-voltage lithium battery is a non-sleep state and the second determining module 303 determines that the type of the action issued by the whole vehicle is an issue wake-up instruction, where the first duration is from when the sleep instruction issued by the whole vehicle is received to when the wake-up instruction issued by the whole vehicle is received;

the calculating submodule 3041 is further used for calculating a first electric quantity value consumed by the low-voltage lithium battery in a first duration;

the calculating submodule 3041 is further configured to calculate a static average current of the low-voltage lithium battery of the whole vehicle during the sleep period according to the first duration and the first electric quantity value.

Therefore, the calculating device for the static average current of the low-voltage lithium battery described in fig. 4 can accurately calculate the static average current of the low-voltage lithium battery under the condition that the low-voltage lithium battery does not meet the sleep condition during the whole vehicle sleep period and is always in the non-sleep state by combining the interval duration between the sleep command and the wake command sent by the whole vehicle and the electric quantity value consumed by the low-voltage lithium battery during the interval duration.

In another optional embodiment, the calculating submodule 3041 is further configured to calculate a second duration from receiving the sleep instruction issued by the whole vehicle to entering the sleep state for the first time when the first determining module 302 determines that the current state of the low-voltage lithium battery is the sleep state and the second determining module 303 determines that the type of the action issued by the whole vehicle is the issue wake instruction;

The calculating submodule 3041 is further used for calculating a second electric quantity value consumed by the low-voltage lithium battery in a second duration;

the calculating submodule 3041 is further used for calculating a third time length from the first time of entering the sleep state to the time of receiving a wake-up instruction issued by the whole vehicle;

the calculating submodule 3041 is further used for calculating a third electric quantity value consumed by the low-voltage lithium battery in a third duration;

the calculating submodule 3041 is further configured to calculate a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the second duration, the second electric quantity value, the third duration and the third electric quantity value.

Therefore, the calculating device for the static average current of the low-voltage lithium battery described in fig. 4 can accurately calculate the static average current of the low-voltage lithium battery when the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep instruction and after the low-voltage lithium battery works for a period of time and receives the wake-up instruction sent by the whole vehicle when the low-voltage lithium battery is in the sleep state by combining the interval time between the low-voltage lithium battery receiving the sleep instruction sent by the whole vehicle and the sleep state of the low-voltage lithium battery and the consumed electric quantity value of the low-voltage lithium battery in the interval time.

In yet another alternative embodiment, as shown in fig. 4, the third determining module 304 may further include a first judging sub-module 3042, a second judging sub-module 3043, where:

the first judging submodule 3042 is configured to judge whether the low-voltage lithium battery is self-awakened when the first determining module 302 determines that the current state of the low-voltage lithium battery is a dormant state and the second determining module 303 determines that the type of action issued by the whole vehicle is a non-issued awakening instruction;

the calculating submodule 3041 is further configured to calculate a fourth duration from when the first judging submodule 3042 judges that the low-voltage lithium battery is self-awakened to when the low-voltage lithium battery is first put into a sleep state to when the low-voltage lithium battery is self-awakened;

the calculating submodule 3041 is further used for calculating a fourth electric quantity value consumed by the low-voltage lithium battery in a fourth duration;

the second judging submodule 3041 is used for judging whether the low-voltage lithium battery synchronously sends out a message to wake up the whole vehicle;

the calculating submodule 3041 is further configured to calculate a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the second duration, the second electric quantity value, the fourth duration, and the fourth electric quantity value when the second submodule 3043 determines that the low-voltage lithium battery sends a message synchronously to wake up the whole vehicle.

Therefore, the calculating device for the static average current of the low-voltage lithium battery described in fig. 4 can accurately calculate the static average current of the low-voltage lithium battery under the conditions that the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep command and the low-voltage lithium battery enters the sleep state after a period of time, and the self-wake-up occurs when the low-voltage lithium battery enters the sleep state and the self-wake-up occurs when the self-wake-up occurs and the self-wake-up is synchronized.

In yet another alternative embodiment, wherein:

the calculating submodule 3041 is further configured to calculate a fifth duration of time from when the low-voltage lithium battery is self-awakened to when the second judging submodule 3042 judges that the low-voltage lithium battery does not send a message synchronously to awaken the whole vehicle, when the first determining module 302 determines that the current state of the low-voltage lithium battery is a sleep state and the second determining module 303 determines that the type of action issued by the whole vehicle is an issue of an awakening instruction;

The calculating submodule 3041 is further used for calculating a fifth current value consumed by the low-voltage lithium battery in a fifth duration;

the calculating submodule 3041 is further used for calculating a sixth time length from the second time of entering the sleep state to the time of receiving a wake-up instruction issued by the whole vehicle;

the calculating submodule 3041 is further used for calculating a sixth electric quantity value consumed by the low-voltage lithium battery in a sixth duration;

the calculating submodule 3041 is further configured to calculate a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the second duration, the second electric quantity value, the fourth duration, the fourth electric quantity value, the fifth duration, the fifth electric quantity value, the sixth duration, and the sixth electric quantity value.

As can be seen, the calculating device for the static average current of the low-voltage lithium battery described in fig. 4 combines the interval duration between the low-voltage lithium battery receiving the sleep command issued by the whole vehicle and the low-voltage lithium battery entering the sleep state and the electric quantity value consumed by the low-voltage lithium battery in the interval duration, the interval duration between the low-voltage lithium battery entering the sleep state and the low-voltage lithium battery being self-awakened but not sending out the message in synchronization to wake up the whole vehicle, the electric quantity value consumed by the low-voltage lithium battery in the interval duration, the interval duration between the low-voltage lithium battery entering the sleep state from the self-awakening to the reentry, the electric quantity value consumed by the low-voltage lithium battery in the interval duration, the interval duration between the low-voltage lithium battery reentry to the reception of the wake-up command issued by the whole vehicle, and the electric quantity value consumed by the low-voltage lithium battery in the interval duration, so that the low-voltage lithium battery can accurately calculate the average current of the low-voltage lithium battery entering the sleep state after the whole vehicle sends the sleep command, the low-voltage lithium battery enters the sleep state after a period of time, the rest state, which is self-awakened but not sent out the whole vehicle, and the rest state, and the average current under the condition of the low-voltage lithium battery is once-low-voltage lithium battery is under the sleep state.

In yet another alternative embodiment, wherein:

the calculating submodule 3041 is further configured to calculate a seventh duration from when the second judging submodule 3043 judges that the low-voltage lithium battery does not send a message synchronously to wake up the whole vehicle, when the first determining module 302 determines that the current state of the low-voltage lithium battery is a non-sleep state and the second determining module 303 determines that the type of the action issued by the whole vehicle is to issue a wake-up instruction, the wake-up instruction issued by the whole vehicle is received from self-wake-up of the low-voltage lithium battery;

the calculating submodule 3041 is further used for calculating a seventh current value consumed by the low-voltage lithium battery in a seventh time period;

the calculating submodule 3041 is further configured to calculate a static average current of the low-voltage lithium battery during the sleep period of the whole vehicle according to the second duration, the second electric quantity value, the fourth duration, the fourth electric quantity value, the seventh duration and the seventh electric quantity value.

Therefore, the calculating device for the static average current of the low-voltage lithium battery described in fig. 4 can accurately calculate the static average current of the low-voltage lithium battery under the conditions that the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep command and the low-voltage lithium battery enters the sleep state after a period of time, the low-voltage lithium battery enters the sleep state and the low-voltage lithium battery is self-awakened but does not send out a message synchronously to awaken the whole vehicle, the interval time between the low-voltage lithium battery and the wake-up command sent by the whole vehicle and the electric quantity consumed by the low-voltage lithium battery within the interval time, and the low-voltage lithium battery enters the sleep state after the whole vehicle sends the sleep command and the low-voltage lithium battery enters the sleep state after the low-voltage lithium battery is in the sleep state, and the low-voltage lithium battery is self-awakened but does not send out a message to awaken the whole vehicle after the low-voltage lithium battery is self-awaken.

In yet another alternative embodiment, as shown in fig. 4, the calculating device of the static average current of the low-voltage lithium battery may further include a determining module 305 and an output module 306, where:

the judging module 305 is configured to judge whether the static average current of the low-voltage lithium battery of the whole vehicle is higher than a preset static current threshold during the sleep period;

and the output module 306 is configured to output a battery power shortage early warning when the judging module 305 judges that the static average current of the low-voltage lithium battery of the whole vehicle is higher than the preset static current threshold value during the sleep period.

In the embodiment of the invention, the battery power shortage early warning is used for prompting that the low-voltage lithium battery is short of power, the power shortage early warning can be sent to a battery management system of the low-voltage lithium battery, and prompt information can be output to at least one of a user terminal, a vehicle control APP and a charging APP through a mobile network.

Therefore, the calculating device for the static average current of the low-voltage lithium battery described in fig. 4 considers the situation that the rest time of the whole vehicle and the low-voltage lithium battery is not synchronous, and can improve the accuracy of the result of calculating the static average current of the low-voltage lithium battery during the rest period of the whole vehicle, thereby being beneficial to improving the accuracy of calculating the power consumption of the whole vehicle during the rest period, and further being beneficial to ensuring that the battery has sufficient electric quantity to be started successfully; the prompt information can be timely output when the low-voltage lithium battery is deficient, so that a battery management system or a user can timely respond to the prompt information, and the problem that a vehicle cannot be started due to the low-voltage lithium battery is avoided.

Example IV

Referring to fig. 5, fig. 5 is a schematic structural diagram of a calculating device for static average current of a low-voltage lithium battery according to another embodiment of the invention. As shown in fig. 5, the calculating means of the static average current of the low-voltage lithium battery may include:

a memory 401 storing executable program codes;

a processor 402 coupled with the memory 701;

the processor 402 invokes executable program codes stored in the memory 701 to execute steps in the method for calculating the static average current of the low-voltage lithium battery described in the first embodiment or the second embodiment of the present invention.

Example five

The embodiment of the invention discloses a computer storage medium which stores computer instructions for executing the steps in the method for calculating the static average current of the low-voltage lithium battery described in the first embodiment or the second embodiment of the invention when the computer instructions are called.

Example six

The embodiment of the invention discloses a computer program product, which comprises a non-transient computer storage medium storing a computer program, and the computer program is operable to cause a computer to execute the steps in the method for calculating the static average current of the low-voltage lithium battery described in the first embodiment or the second embodiment of the invention.

The apparatus embodiments described above are merely illustrative, wherein the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer storage medium including Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (One-time Programmable Read-OnlyMemory, OTPROM), electrically erasable rewritable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disk Memory, tape Memory, or any other medium that can be used for a computer that carries or stores data.

Finally, it should be noted that: the embodiment of the invention discloses a method and a device for calculating the static average current of a low-voltage lithium battery, which are disclosed by the embodiment of the invention, are only used for illustrating the technical scheme of the invention, and are not limited by the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A method for calculating a static average current of a low-voltage lithium battery, the method comprising:

2. The method for calculating the static average current of the low-voltage lithium battery according to claim 1, wherein the determining the static average current of the low-voltage lithium battery during the entire vehicle sleep period according to the current state of the low-voltage lithium battery and the type of the action issued by the entire vehicle comprises:

3. The method for calculating the static average current of the low-voltage lithium battery according to claim 2, further comprising:

4. The method for calculating the static average current of a low-voltage lithium battery according to claim 3, further comprising:

5. The method of calculating the static average current of a low-voltage lithium battery according to claim 4, further comprising:

6. The method of calculating the static average current of a low-voltage lithium battery according to claim 5, further comprising:

7. The method of any one of claims 1-6, further comprising:

8. A device for calculating static average current of a low-voltage lithium battery, which is characterized by comprising a communication module, a first determination module, a second determination module and a third determination module, wherein:

9. A device for calculating a static average current of a low voltage lithium battery, the device comprising:

a memory storing executable program code;

A processor coupled to the memory;

10. A computer storage medium storing computer instructions which, when invoked, are adapted to perform the method of calculating the static average current of a low voltage lithium battery according to any one of claims 1-7.