CN107843802B

CN107843802B - Internal short circuit detection method and device

Info

Publication number: CN107843802B
Application number: CN201710993428.4A
Authority: CN
Inventors: 高锃; 陈仁杰; 罗文辉; 王宗强
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2017-10-23
Filing date: 2017-10-23
Publication date: 2020-06-02
Anticipated expiration: 2037-10-23
Also published as: CN107843802A

Abstract

The application discloses an internal short circuit detection method and device, and belongs to the technical field of electronics. The method comprises the following steps: acquiring the loss electric quantity of the battery in a first preset time period; acquiring the consumed electric quantity of an external circuit connected with a battery in a first preset time period; judging whether the ratio of the consumed electric quantity to the lost electric quantity is smaller than a first preset ratio threshold value, wherein the first preset ratio threshold value is smaller than 1; and when the ratio of the consumed electric quantity to the lost electric quantity is smaller than a first preset ratio threshold value, determining that the internal short circuit occurs in the battery. The present disclosure detects whether the battery is internally short-circuited by determining the ratio of the consumed power to the lost power of the external circuit, thereby achieving effective detection of the internal short-circuit. The present disclosure is used to detect whether an internal short circuit occurs in a battery.

Description

Internal short circuit detection method and device

Technical Field

The present disclosure relates to the field of electronic technologies, and in particular, to a method and an apparatus for detecting an internal short circuit.

Background

With the development of electronic technology, batteries are widely used, and batteries are more indispensable in electronic devices such as smart phones.

In the related art, the positive pole piece and the negative pole piece of the battery are arranged relatively close to each other, and the positive pole piece and the negative pole piece are separated by a diaphragm. When the battery is used, the diaphragm can be broken due to collision or heating, so that the positive and negative pole pieces are in contact with each other to cause internal short circuit of the battery, and further the current consumed in the battery is increased. With time, the battery generates heat due to an increase in the current consumed therein, which in turn causes the battery to swell and even explode.

After the battery is put into use, a user cannot determine whether the battery has an internal short circuit, and therefore, a method for detecting the internal short circuit is needed.

Disclosure of Invention

The application provides an internal short circuit detection method and device, which can detect whether a battery is internally short-circuited. The technical scheme is as follows:

according to a first aspect of the present disclosure, there is provided an internal short detection method, the method comprising:

acquiring the loss electric quantity of the battery in a first preset time period;

acquiring the consumed electric quantity of an external circuit connected with the battery in the first preset time period;

judging whether the ratio of the consumed electric quantity to the lost electric quantity is smaller than a first preset ratio threshold value, wherein the first preset ratio threshold value is smaller than 1;

and when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the first preset ratio threshold value, determining that the internal short circuit occurs in the battery.

Optionally, when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the first preset ratio threshold, determining that an internal short circuit occurs in the battery includes:

acquiring the actual internal resistance of the battery at least one moment in the first preset time period;

determining the average value of the actual internal resistance at the at least one moment as an average internal resistance;

obtaining rated internal resistance of the battery;

judging whether the ratio of the average internal resistance to the rated internal resistance is smaller than a second preset ratio threshold value, wherein the second preset ratio threshold value is smaller than 1;

and when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the first preset ratio threshold value, and the ratio of the average internal resistance to the rated internal resistance is smaller than the second preset ratio threshold value, determining that the internal short circuit occurs in the battery.

Optionally, the obtaining of the power loss of the battery in the first preset time period includes:

acquiring a preset Open Circuit Voltage (OCV) curve of the battery;

when the external circuit is detected to meet a first preset condition, acquiring a first voltage between the anode and the cathode of the battery, wherein the first preset condition is as follows: the current consumption of the external circuit is continuously smaller than a preset current threshold value within a first preset time, the preset current threshold value is x, and x is more than 0 milliampere and less than or equal to 300 milliampere;

determining a first electric quantity corresponding to the first voltage according to the OCV curve;

when the external circuit is detected to meet a second preset condition, acquiring a second voltage between the anode and the cathode of the battery, wherein the second preset condition is as follows: within a second preset time after the external circuit meets the first preset condition, the current consumption of the external circuit is continuously smaller than the preset current threshold;

when the second voltage is smaller than the first voltage, determining a second electric quantity corresponding to the second voltage according to the OCV curve;

determining a difference between the first and second electrical quantities as the lost electrical quantity.

Optionally, the step of obtaining the consumed electric quantity of the external circuit connected to the battery within the first preset time period includes:

and acquiring the consumed electric quantity through the coulometer.

Optionally, the method further includes:

and when the internal short circuit of the battery is determined, controlling the electronic equipment to display prompt information for indicating the internal short circuit of the battery.

Optionally, the method further includes:

after the internal short circuit of the battery is determined, judging whether the ratio of the consumed electric quantity to the lost electric quantity is smaller than a third preset ratio threshold value, wherein the third preset ratio threshold value is smaller than the first preset ratio threshold value;

and when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the third preset ratio threshold value, controlling the electronic equipment to display early warning information for indicating that the battery is damaged.

Optionally, the method further includes:

after the battery is determined to be damaged, judging whether the ratio of the consumed electric quantity to the lost electric quantity is smaller than a fourth preset ratio threshold value, wherein the fourth preset ratio threshold value is smaller than the third preset ratio threshold value;

and when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the fourth preset ratio threshold value, controlling the electronic equipment to shut down.

Optionally, the first preset ratio threshold is 95%, and the second preset ratio threshold is 80%.

According to a second aspect of the present disclosure, there is provided an internal short detection device including:

the first acquisition module is configured to acquire the loss electric quantity of the battery within a first preset time period;

the second acquisition module is configured to acquire the consumed electric quantity of the external circuit connected with the battery in the first preset time period;

a first determining module configured to determine whether a ratio of the consumed electric energy to the lost electric energy is smaller than a first preset ratio threshold, where the first preset ratio threshold is smaller than 1;

a determination module configured to determine that an internal short circuit has occurred in the battery when the ratio of the consumed power amount to the lost power amount is less than the first preset ratio threshold.

Optionally, the determining module is configured to:

obtaining rated internal resistance of the battery;

Optionally, the first obtaining module is configured to:

acquiring a preset Open Circuit Voltage (OCV) curve of the battery;

Optionally, the external circuit is connected to a coulometer, and the second acquisition module is configured to:

and acquiring the consumed electric quantity through the coulometer.

Optionally, the battery and the external circuit are both disposed in an electronic device, and the internal short circuit detection device further includes:

the first control module is configured to control the electronic equipment to display prompt information for indicating the occurrence of the internal short circuit of the battery when the internal short circuit of the battery is determined.

Optionally, the internal short circuit detection device further includes:

the second judging module is configured to judge whether the ratio of the consumed electric quantity to the lost electric quantity is smaller than a third preset ratio threshold value after the internal short circuit of the battery is determined, wherein the third preset ratio threshold value is smaller than the first preset ratio threshold value;

a second control module configured to control the electronic device to display warning information indicating that the battery is damaged when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the third preset ratio threshold.

Optionally, the internal short circuit detection device further includes:

a third determining module configured to determine whether a ratio of the consumed electric quantity to the lost electric quantity is smaller than a fourth preset ratio threshold after determining that the battery is damaged, wherein the fourth preset ratio threshold is smaller than the third preset ratio threshold;

a third control module configured to control the electronic device to shut down when the ratio of the consumed electric quantity to the lost electric quantity is smaller than the fourth preset ratio threshold.

According to a third aspect of the present disclosure, there is provided an internal short detection apparatus including:

a processing component;

a memory for storing executable instructions of the processing component;

wherein the processing component is configured to:

According to a fourth aspect of the present disclosure, there is provided a readable storage medium having stored therein instructions which, when run on a processing component, cause the processing component to perform the internal short detection method as in the first aspect.

The technical scheme provided by the disclosure has the following beneficial effects:

the present disclosure provides an internal short detection method in which the proportion of the consumed power of an external circuit is determined by comparing the entire lost power of a battery with the consumed power of the external circuit. When the proportion of the consumed electric quantity of the external circuit is low, the proportion of the self discharge quantity of the battery can be determined to be high, and at the moment, the internal short circuit of the battery can be determined.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

Fig. 1 is a schematic structural diagram illustrating an electronic device and an internal short detection apparatus according to an exemplary embodiment;

FIG. 2 is a method flow diagram illustrating a method of internal short detection in accordance with an exemplary embodiment;

FIG. 3 is a method flow diagram illustrating another internal short detection method in accordance with an exemplary embodiment;

FIG. 4 is a flow diagram illustrating a method of acquiring lost power in accordance with an exemplary embodiment;

FIG. 5 is a schematic diagram illustrating a configuration of an electronic device in accordance with an exemplary embodiment;

FIG. 6 is a schematic diagram illustrating another electronic device in accordance with an exemplary embodiment;

FIG. 7 is a method flow diagram illustrating yet another internal short detection method in accordance with an exemplary embodiment;

FIG. 8 is a schematic diagram illustrating the structure of an internal short detection device according to an exemplary embodiment;

FIG. 9 is a schematic diagram illustrating another internal short detection arrangement in accordance with an exemplary embodiment;

FIG. 10 is a schematic diagram illustrating a further internal short detection arrangement in accordance with an exemplary embodiment;

FIG. 11 is a schematic diagram illustrating a further internal short detection arrangement in accordance with an exemplary embodiment;

fig. 12 is a block diagram illustrating an internal short detection device according to an exemplary embodiment.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

In various electronic devices, a battery is essential, and the battery may be internally short-circuited during a long-term use, thereby possibly disabling the battery and possibly even causing a danger such as explosion of the battery. Therefore, detecting whether the internal short circuit of the battery occurs is very important for safe use of the electronic device.

As shown in fig. 1, a battery 101 may be provided in the electronic apparatus 10. The battery 101 may include a battery core 1011, a positive pole piece 1012, a negative pole piece 1013, and a separator 1014. The positive pole piece 1012 is connected to the positive pole of the battery core 1011 (connection is not shown in fig. 1), the negative pole piece 1013 is connected to the negative pole of the battery core 1011, the positive pole piece 1012 and the negative pole piece 1013 are disposed relatively close to each other, and the positive pole piece 1012 and the negative pole piece 1013 are separated by a diaphragm 1014.

Both the positive pole piece 1012 and the negative pole piece 1013 of the battery 101 may be connected to an internal short detection device (not shown in fig. 1). The internal short detection means may be located in the electronic device 10 or may be independent from the electronic device 10. For example, when the internal short circuit detection device is located in the electronic device, the internal short circuit detection device may be a Central Processing Unit (CPU) in the electronic device, or may be another device in the electronic device except for the CPU, which is not limited in this disclosure. The internal short detection means may be used to detect whether an internal short occurs in the battery 101.

FIG. 2 is a flow chart illustrating a method of internal short detection in accordance with an exemplary embodiment. As shown in fig. 2, the internal short detection method is performed by an internal short detection apparatus, and may include:

in step 201, the lost power of the battery in a first preset time period is obtained.

In step 202, the consumed power of the external circuit connected with the battery in a first preset time period is acquired.

In step 203, it is determined whether the ratio of the consumed power to the lost power is smaller than a first predetermined ratio threshold.

Wherein, the first preset ratio threshold is smaller than 1. For example, the first preset ratio threshold may be 95%.

In step 204, when the ratio of the consumed power to the lost power is smaller than a first preset ratio threshold, it is determined that an internal short circuit occurs in the battery.

It should be noted that the power loss of the battery in a certain period of time includes: the amount of power consumed by the external circuit to which the battery is connected, and the amount of discharge of the battery itself. When the battery is not internally short-circuited, the consumed electric quantity of an external circuit connected with the battery in the time period is far larger than the self discharge quantity of the battery, and the ratio of the consumed electric quantity to the lost electric quantity of the battery is larger than a first preset ratio threshold. When the battery is internally short-circuited, the self discharge capacity of the battery is increased, and the ratio of the consumed electric quantity of an external circuit connected with the battery to the lost electric quantity of the battery is smaller than a first preset ratio threshold value.

In summary, in the internal short circuit detection method provided in the embodiment of the present disclosure, the ratio of the consumed electric quantity of the external circuit is determined by comparing the entire lost electric quantity of the battery with the consumed electric quantity of the external circuit. When the proportion of the consumed electric quantity of the external circuit is low, the discharging quantity of the battery can be determined to be high, at the moment, the internal short circuit of the battery is determined, and therefore effective detection of whether the internal short circuit of the battery occurs is achieved.

FIG. 3 is a method flow diagram illustrating another internal short detection method in accordance with an exemplary embodiment. The internal short circuit detection method may be executed by an internal short circuit detection device, and the embodiment of the present disclosure is explained by taking the internal short circuit detection device as an example, where the internal short circuit detection device is located in an electronic device and is a CPU in the electronic device, and as shown in fig. 3, the internal short circuit detection method may include:

in step 301, the power loss of the battery in a first preset time period is obtained. Step 302 is performed.

As shown in fig. 4, step 301 may include:

in step 3011, a preset OCV curve of the battery is obtained. Step 3012 is performed.

The OCV curve of the battery may also be referred to as an Open Circuit Voltage (OCV) curve of the battery. The OCV curve of the battery is a curve of the electric quantity of the battery with respect to the open-circuit voltage of the battery, that is, the abscissa of the OCV curve is the open-circuit voltage of the battery, and the ordinate is the electric quantity of the battery.

Before the electronic device where the battery is located leaves the factory, a worker may measure a plurality of open-circuit voltages of the battery and an electric quantity of the battery when the battery is in a stationary state (at this time, a current consumption of an external circuit is continuously less than a preset current threshold value within a first preset time period), respectively, to obtain an OCV curve of the battery, and store the OCV curve in the electronic device where the battery is located, for example, the OCV curve may be stored in a memory in the electronic device. In step 3011, the CPU may directly read the OCV curve stored in the memory in advance.

In step 3012, upon detecting that the external circuit satisfies a first preset condition, a first voltage between the positive and negative electrodes of the battery is obtained. Step 3013 is performed.

Wherein the first preset condition is as follows: the current consumption of the external circuit is continuously smaller than the preset current threshold value within the first preset duration, and when the external circuit meets the first preset condition, the battery is in a standing state.

For example, an ammeter may be provided in the electronic device in which the battery is provided, and the ammeter may be connected to the external circuit and the CPU, respectively. The ammeter can acquire the current consumption of the external circuit, and the CPU can measure the current consumption of the external circuit at regular intervals through the ammeter. And when the CPU measures that the current consumption of the external circuit is continuously smaller than the preset current threshold value within the first preset time period through the ammeter, the CPU can determine that the external circuit meets the first preset condition at the moment. For example, the first preset time period may be 2 hours, the preset current threshold may be x, and x may range from 0 ma < x ≦ 300 ma, where x ═ 300 ma is taken as an example for explanation in the embodiment of the present disclosure.

Furthermore, the electronic device in which the battery is located may further include a voltmeter, and the voltmeter may be connected to the positive electrode and the negative electrode of the battery and the CPU, respectively. The voltmeter can acquire the voltage between the positive electrode and the negative electrode of the battery, and the CPU can acquire the first voltage between the positive electrode and the negative electrode of the battery at the moment through the voltmeter after determining that the external circuit meets the first preset condition.

For example, at 9, the power consumption of the external circuit acquired by the CPU through the ammeter is less than 300 milliamperes, and the power consumption of the external circuit acquired by the CPU through the ammeter continues to be less than 300 milliamperes within a first preset time period (2 hours) thereafter, then the CPU may determine that the power consumption of the external circuit satisfies the first preset condition. At this time, the CPU may acquire the first voltage between the positive electrode and the negative electrode of the battery at the end time of the 2 hours (i.e., at 11 o' clock) by the voltmeter. For example, the first voltage obtained by the voltmeter is 3.5 volts.

In step 3013, a first electrical quantity corresponding to the first voltage is determined according to the OCV curve. Step 3014 is performed.

For example, the CPU may compare the first voltage obtained by the voltmeter with the OCV curve obtained in step 3011 to obtain a first electric quantity corresponding to the first voltage. For example, the first voltage of 3.5 volts corresponds to a first electrical quantity of 3000 milliamp-hours.

In step 3014, upon detecting that the external circuit satisfies a second preset condition, a second voltage between the positive electrode and the negative electrode of the battery is obtained. Step 3015 is performed.

Wherein the second preset condition is as follows: and within a second preset time after the external circuit meets the first preset condition, the current consumption of the external circuit is continuously smaller than a preset current threshold, and when the external circuit meets the second preset condition, the battery is in a standing state. After detecting that the external circuit meets the first preset condition, the CPU can continue to acquire the current consumption of the external circuit through the ammeter. If the power consumption current of the external circuit acquired by the CPU is continuously smaller than the preset current threshold within a second preset time period after the external circuit meets the first preset condition, the CPU may determine that the external circuit meets the second preset condition at this time. At this time, the CPU may acquire the second voltage between the positive electrode and the negative electrode of the battery through the voltmeter.

Optionally, the second preset duration may be equal to the first preset duration, and the second preset duration may also be unequal to the first preset duration. For example, the second preset time period may be 2 hours.

For example, assuming that the CPU detects that the external circuit satisfies the first preset condition at 11 o ' clock, and the CPU obtains the current consumption less than 300 ma again through the ammeter at 11 o ' clock and 10 o ' clock, and the current consumption obtained by the CPU through the ammeter is less than 300 ma within 2 hours after 11 o ' clock and 10 o ' clock, the CPU may determine that the external circuit satisfies the second preset condition at this time, and may obtain a second voltage between the positive electrode and the negative electrode of the battery at the termination time of the 2 hours (i.e., 13 o ' clock and 10 o ' clock) through the voltmeter, where the second voltage is, for example, 3 v.

In step 3015, it is determined whether the second voltage is less than the first voltage. If the second voltage is less than the first voltage, go to step 3016; if the second voltage is greater than or equal to the first voltage, step 3012 is performed.

After acquiring the first voltage and the second voltage, the CPU may compare the first voltage and the second voltage to determine whether the second voltage is less than the first voltage. It should be noted that when the second voltage of the battery is smaller than the first voltage, it can indicate that the battery is not in the charging state, and the relationship between the second voltage and the second electric quantity of the battery at this time corresponds to the relationship between the open-circuit voltage and the electric quantity in the OCV curve obtained in step 3011. When the second voltage of the battery is greater than or equal to the first voltage, it may indicate that the battery is in a charging state, and at this time, the relationship between the second voltage and the second electric quantity of the battery at this time does not conform to the relationship between the open-circuit voltage and the electric quantity in the OCV curve obtained in step 3011.

In step 3016, a second electrical quantity corresponding to the second voltage is determined according to the obtained OCV curve. Step 3017 is performed.

For example, the second voltage 3 volts obtained by the voltmeter is less than the first voltage 3.5 volts, and the CPU may determine a second electric quantity corresponding to the second voltage 3 volts according to the OCV curve, for example, the second electric quantity is 1000 ma hours.

In step 3017, a difference between the first power and the second power is determined as a power loss of the battery in a first preset time period.

The time period between the time when the external circuit meets the first preset condition and the time when the external circuit meets the second preset condition is a first preset time period, and the CPU may determine a difference between a first electric quantity of the battery at a start time and a second electric quantity at an end time of the first preset time period as a loss electric quantity of the battery within the first preset time period.

For example, the CPU may determine that a difference between 3000 ma-hrs of the first power and 1000 ma-hrs of the second power is 2000 ma-hrs, and determine that a lost power of the battery for a first preset time period is 2000 ma-hrs.

In step 302, the consumption of the external circuit in a first preset time period is obtained. Step 303 is performed.

And the time period between the moment when the external circuit meets the first preset condition and the moment when the external circuit meets the second preset condition is a first preset time period. The electronic equipment where the battery is located can be also provided with a coulometer which can be respectively connected with an external circuit and the CPU. When the CPU determines that the external circuit meets the first preset condition, the CPU can continuously acquire the consumed electric quantity of the external circuit through the coulometer until the external circuit is detected to meet the second preset condition. For example, the first preset time period may be a time period between 11 o 'clock (a time when the external circuit is detected to satisfy the first preset condition) and 13 o' clock (a time when the external circuit is detected to satisfy the second preset condition) and 10 minutes, and the coulomb meter may acquire the consumption power of the external circuit to 1860 ma hours.

In step 303, it is determined whether the ratio of the consumed power to the lost power is smaller than a first predetermined ratio threshold. When the ratio of the consumed power to the lost power is smaller than the first preset ratio threshold, go to step 304; when the ratio of the consumed power to the lost power is greater than or equal to the first preset ratio threshold, step 301 is executed.

For example, the first predetermined ratio threshold may be 95%, and if the ratio of the power consumption 1860 ma hours to the power loss 2000 ma hours is 1860 ÷ 2000 ÷ 93%, the CPU may determine that the ratio is less than the first predetermined ratio threshold 95%, and may execute step 304. If the consumed power is 1920 ma, the ratio of the consumed power to the lost power is 1920 ma, i.e. 1920 ÷ 2000 ÷ 96%, and the CPU may determine that the ratio is greater than the first preset ratio threshold value of 95%, then step 301 may be continued.

In step 304, it is determined that an internal short circuit has occurred in the battery. Step 305 is performed.

When the ratio of the consumed electric quantity to the lost electric quantity is smaller than a first preset ratio threshold value, the CPU can determine that the battery is internally short-circuited, namely the positive pole piece and the negative pole piece of the battery are already contacted, and the self discharge capacity of the battery is higher at the moment.

In step 305, the electronic device is controlled to display a prompt. Step 306 is performed.

Wherein the prompt message can be used for indicating that the internal short circuit occurs in the battery. When the battery has an internal short circuit, the CPU may control the electronic device (e.g., a mobile phone) to display a prompt message indicating that the battery has an internal short circuit. The prompting message may also be used to prompt the user to take precautions (e.g., replace batteries). As shown in fig. 5, the content of the prompt message may be: "the battery has an internal short circuit and please replace the battery in time! "

It should be noted that, in step 305, the CPU controls the electronic device to display the prompt message, so that the user using the electronic device can know that the internal short circuit of the battery in the electronic device has occurred, and make corresponding precautionary measures to avoid the danger possibly brought by the internal short circuit of the battery.

In step 306, it is determined whether the ratio of the consumed power to the lost power is less than a third predetermined ratio threshold. When the ratio of the consumed electric quantity to the lost electric quantity is smaller than a third preset ratio threshold, executing step 307; when the ratio of the consumed power to the lost power is greater than or equal to the third preset ratio threshold, step 301 is executed.

The third preset ratio threshold may be smaller than the first preset ratio threshold, and for example, the third preset ratio threshold may be 90%.

In step 307, the electronic device is controlled to display the warning information. Step 308 is performed.

The warning information may be used to indicate that the battery has been damaged. Since the lost electric power of the battery includes the consumed electric power of the external circuit and the discharged electric power of the battery itself, when the ratio of the consumed electric power to the lost electric power is less than 90%, it may be determined that the ratio of the discharged electric power of the battery itself to the lost electric power is greater than 10%. At this moment, the discharge capacity of the battery is too large, so that it can be determined that the short circuit condition in the battery is serious, the battery is damaged, and the use of the electronic equipment by a user is influenced.

As shown in fig. 6, the electronic device (e.g., a mobile phone) may display warning information indicating that the battery is damaged, and the warning information may be used to prompt the user to take a precautionary measure (e.g., to replace the battery), and may prompt the user whether to perform a relevant operation (e.g., to control the electronic device to turn off). As shown in fig. 6, the warning information may include: "is the battery damaged, please replace the battery in time, if shutdown? "

In addition, the electronic device may also display different selection buttons (e.g., "yes" and "no" buttons) so that the user can control the electronic device to perform different operations, such as power off or continued use, by pressing or clicking the different selection buttons. When the user clicks the 'yes' button, the CPU can control the electronic equipment to be powered off; when the user clicks the no button, the CPU may control the electronic device to stop displaying the warning information.

It should be noted that, when the user sees the warning information, the user can know that the battery in the electronic device is damaged, and can replace the battery, so as to prevent the damage degree of the battery from further aggravating, and even prevent the battery from expanding or exploding.

In step 308, it is determined whether the ratio of the consumed power to the lost power is smaller than a fourth predetermined ratio threshold. When the ratio of the consumed electric quantity to the lost electric quantity is smaller than a fourth preset ratio threshold, executing step 309; when the ratio of the consumed power to the lost power is greater than or equal to the fourth preset ratio threshold, step 301 is executed.

And the fourth preset ratio threshold is smaller than the third preset ratio threshold. As an example, the fourth preset ratio threshold may be 80%.

In step 309, the electronic device is controlled to power off.

When the ratio of the consumed electric quantity to the lost electric quantity is less than 80%, the internal short circuit condition of the battery is very serious, and at the moment, the CPU can control the electronic equipment to be shut down to force the battery to stop using, so that the danger caused by the use of the battery under the condition of serious damage is avoided.

In the internal short circuit detection method provided by the embodiment of the disclosure, the ratio of the consumed electric quantity of the external circuit is determined by comparing the whole lost electric quantity of the battery with the consumed electric quantity of the external circuit. When the proportion of the consumed electric quantity of the external circuit is low, the discharging quantity of the battery can be determined to be high, at the moment, the internal short circuit of the battery is determined, and therefore effective detection of whether the internal short circuit of the battery occurs is achieved. In addition, according to the severity of the internal short circuit of the battery, the electronic equipment can be controlled to display prompt information and early warning information and to shut down the electronic equipment, so that the situation that the battery expands or even explodes due to the internal short circuit of the battery is prevented.

Optionally, as shown in fig. 7, on the basis of the internal short circuit detection method provided in fig. 3, after determining that the ratio of the consumed power to the lost power is smaller than the first preset ratio threshold in step 303, step 310, step 311, step 312, and step 313 may also be sequentially performed, where step 313 is a step of determining, and step 304, step 305, step 306, step 307, step 308, and step 309 are performed only when the determination result in step 313 is yes. Step 310, step 311, step 312 and step 313 will be exemplified below.

In step 310, the actual internal resistance of the battery at least one moment in time within a first preset time period is obtained. Step 311 is performed.

For example, an internal resistance meter may be provided in the electronic device in which the battery is located, and the internal resistance meter may be connected to the battery and the CPU, respectively, and the CPU may obtain the actual internal resistance of the battery through the internal resistance meter. For example, when detecting that the external circuit satisfies the first preset condition, the CPU may obtain the actual internal resistance of the battery through the internal resistance meter at regular intervals (e.g., 30 minutes) until detecting that the external circuit satisfies the second preset condition. For example, the first preset time period is 2 hours, and the internal resistance meter acquires the actual internal resistance of the battery for 4 times in total within the 2 hours, which are 90 milliohms, 110 milliohms, 85 milliohms, and 115 milliohms, respectively.

In step 311, an average value of the actual internal resistances at least one time is determined as an average internal resistance. Step 312 is performed.

For example, when the average value of the 4 actual internal resistances obtained by the CPU through the internal resistance meter in step 310 is (90+110+85+115) ÷ 4 ═ 100 milliohms, the CPU may determine that the average internal resistance is the average value of the 4 actual internal resistances, that is, 100 milliohms.

In step 312, the nominal internal resistance of the battery is obtained. Step 313 is performed.

The rated internal resistance may be stored in the electronic device before the electronic device in which the battery is located is shipped, and for example, the rated internal resistance may be stored in a memory in the electronic device. The rated internal resistance can be an average value of actual internal resistances of the battery obtained by multiple measurements when the internal short circuit of the battery does not occur. For example, the nominal internal resistance of the battery may be 110 milliohms.

In step 313, it is determined whether the ratio of the average internal resistance to the nominal internal resistance is less than a second predetermined ratio threshold. When the ratio of the average internal resistance to the rated internal resistance is smaller than a second preset ratio threshold, executing step 304; when the ratio of the average internal resistance to the rated internal resistance is greater than or equal to a second preset ratio threshold, step 301 is executed.

It should be noted that, when the internal short circuit occurs in the battery, the internal resistance of the battery decreases to some extent, that is, the ratio of the average internal resistance to the rated internal resistance of the battery is smaller than 1. The second preset ratio threshold may be less than 1. For example, the second predetermined ratio threshold may be 80%, and when the ratio of the average internal resistance of 100 milliohms to the rated internal resistance of 110 milliohms is 100 ÷ 110 ≈ 90.9%, which is greater than the second predetermined ratio threshold 80%, the CPU may determine that the internal short circuit of the battery has not occurred. When the ratio of the average internal resistance to the rated internal resistance is less than 80% (i.e., when the average internal resistance is less than 88 milliohms), the CPU may determine that an internal short circuit has occurred in the battery.

In the internal short circuit detection method provided by the embodiment of the disclosure, after it is determined that the proportion of the consumed electric quantity of the external circuit connected to the battery is high, the average internal resistance is obtained by obtaining the actual internal resistance of the battery, and the ratio of the average internal resistance to the rated internal resistance is compared with the second preset ratio threshold. When the ratio is smaller than the second preset ratio threshold, the internal short circuit of the battery can be determined, and therefore the battery can be detected more accurately whether the internal short circuit occurs. In the related art, whether the battery has an internal short circuit or not can be monitored in the manufacturing process of the battery, and usually, when the battery is monitored to have the internal short circuit, the battery is irradiated by using X rays so as to check whether positive and negative pole pieces of the battery are connected or not, and further, whether the battery has the internal short circuit or not is determined. However, the related art cannot detect the internal short circuit in the using process after the battery is manufactured, and the internal short circuit detection method provided by the embodiment of the disclosure can detect the internal short circuit in the using process after the battery is manufactured, so that a user can know whether the internal short circuit occurs in the battery in time, and the internal short circuit detection method is simple and rapid.

In summary, in the internal short circuit detection method provided in the embodiment of the present disclosure, the ratio of the consumed electric quantity of the external circuit is determined by comparing the entire lost electric quantity of the battery with the consumed electric quantity of the external circuit. When the proportion of the consumed electric quantity of the external circuit is low, the proportion of the self discharge quantity of the battery can be determined to be high, and at the moment, the internal short circuit of the battery can be determined. In addition, according to the severity of the internal short circuit of the battery, the electronic equipment can be controlled to display prompt information and early warning information and to shut down the electronic equipment, so that the situation that the battery expands or even explodes due to the internal short circuit of the battery is prevented.

Fig. 8 is a schematic structural diagram illustrating an internal short detection device according to an exemplary embodiment. As shown in fig. 8, the internal short detection device 00 may include:

the first acquisition module 001 is configured to acquire the power loss of the battery within a first preset time period;

a second acquiring module 002 configured to acquire the consumed power of the external circuit connected with the battery within a first preset time period;

a first determining module 003 configured to determine whether a ratio of the consumed electric energy to the lost electric energy is smaller than a first preset ratio threshold, where the first preset ratio threshold is smaller than 1;

a determination module 004 configured to determine that an internal short circuit occurs in the battery when a ratio of the consumed power to the lost power is less than a first preset ratio threshold.

In summary, in the internal short circuit detection device provided in the embodiment of the present disclosure, the first determining module determines the ratio of the consumed electric quantity of the external circuit by comparing the entire lost electric quantity of the battery with the consumed electric quantity of the external circuit. When the proportion of the consumed electric quantity of the external circuit is low, the determining module can determine that the proportion of the discharged electric quantity of the battery is high, and at the moment, the battery is determined to be internally short-circuited, so that whether the battery is internally short-circuited or not is effectively detected.

Optionally, the determining module 004 is configured to:

acquiring the actual internal resistance of the battery at least one moment in a first preset time period;

determining the average value of the actual internal resistance at least one moment as the average internal resistance;

obtaining rated internal resistance of the battery;

and when the ratio of the consumed electric quantity to the lost electric quantity is smaller than a first preset ratio threshold value and the ratio of the average internal resistance to the rated internal resistance is smaller than a second preset ratio threshold value, determining that the internal short circuit occurs in the battery.

Optionally, the first obtaining module 001 is configured to:

acquiring a preset Open Circuit Voltage (OCV) curve of the battery;

when detecting that an external circuit meets a first preset condition, acquiring a first voltage between a positive electrode and a negative electrode of a battery, wherein the first preset condition is as follows: the power consumption current of the external circuit is continuously smaller than a preset current threshold value within a first preset time, the preset current threshold value is x, and x is larger than 0 milliampere and smaller than or equal to 300 milliampere;

when detecting that the external circuit meets a second preset condition, acquiring a second voltage between the anode and the cathode of the battery, wherein the second preset condition is as follows: within a second preset time after the external circuit meets the first preset condition, the current consumption of the external circuit is continuously smaller than a preset current threshold value;

the difference between the first and second electrical quantities is determined as a lost electrical quantity.

Optionally, the external circuit is connected to a coulometer, and the second acquisition module 002 is configured to: the consumed electric quantity is obtained by a coulometer.

Optionally, the battery and the external circuit are both disposed in the electronic device, fig. 9 is a schematic structural diagram of another internal short circuit detection apparatus according to an exemplary embodiment, as shown in fig. 9, and on the basis of fig. 8, the internal short circuit detection apparatus 00 may further include:

the first control module 005 is configured to control the electronic device to display a prompt message indicating that the internal short circuit occurs in the battery when it is determined that the internal short circuit occurs in the battery.

Optionally, fig. 10 is a schematic structural diagram of another internal short circuit detection device according to an exemplary embodiment, as shown in fig. 10, on the basis of fig. 9, the internal short circuit detection device 00 may further include:

the second determining module 006 is configured to determine whether a ratio of the consumed power to the lost power is smaller than a third preset ratio threshold after the internal short circuit of the battery is determined, where the third preset ratio threshold is smaller than the first preset ratio threshold;

the second control module 007 is configured to control the electronic device to display warning information indicating that the battery is damaged when the ratio of the consumed power to the lost power is smaller than a third preset ratio threshold.

Optionally, fig. 11 is a schematic structural diagram of another internal short circuit detection device according to an exemplary embodiment, as shown in fig. 11, on the basis of fig. 10, the internal short circuit detection device 00 may further include:

a third determining module 008 configured to determine whether a ratio of the consumed power to the lost power is smaller than a fourth preset ratio threshold after the battery is determined to be damaged, wherein the fourth preset ratio threshold is smaller than the third preset ratio threshold;

the third control module 009 is configured to control the electronic device to shut down when the ratio of the consumed power to the lost power is smaller than a fourth preset ratio threshold.

In summary, in the internal short circuit detection device provided in the embodiment of the present disclosure, the first determining module determines the ratio of the consumed electric quantity of the external circuit by comparing the entire lost electric quantity of the battery with the consumed electric quantity of the external circuit. When the proportion of the consumed electric quantity of the external circuit is low, the discharging quantity of the battery can be determined to be high, at the moment, the determining module determines that the internal short circuit occurs in the battery, and therefore effective detection of whether the internal short circuit occurs in the battery is achieved. In addition, the first control module can control the electronic equipment to display prompt information when the internal short circuit occurs in the battery, the second control module can control the electronic equipment to display early warning information, and the third control module can control the electronic equipment to be shut down, so that the situation that the battery expands or even explodes due to the internal short circuit of the battery is prevented.

Fig. 12 is a block diagram illustrating an internal short detection device according to an exemplary embodiment. Alternatively, the internal short detection apparatus 1400 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, or the like.

Referring to fig. 12, apparatus 1400 may include one or more of the following components: a processing component 1402, a memory 1404, a power component 1406, a multimedia component 1408, an audio component 1410, an input/output (I/O) interface 1412, a sensor component 1414, and a communication component 1416.

The processing component 1402 generally controls the overall operation of the device 1400, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. Processing component 1402 may include one or more processors 1420 to execute instructions to perform all or a portion of the steps of the methods described above. Further, processing component 1402 can include one or more modules that facilitate interaction between processing component 1402 and other components. For example, the processing component 1402 can include a multimedia module to facilitate interaction between the multimedia component 1408 and the processing component 1402.

The memory 1404 is configured to store various types of data to support operations at the apparatus 1400. Examples of such data include instructions for any application or method operating on device 1400, contact data, phonebook data, messages, pictures, videos, and so forth. The memory 1404 may be implemented by any type of volatile or non-volatile storage device or combination of devices, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disks.

The power supply component 1406 provides power to the various components of the device 1400. The power components 1406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for the device 1400.

The multimedia component 1408 includes a screen that provides an output interface between the device 1400 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive an input signal from a user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundary of a touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 1408 includes a front-facing camera and/or a rear-facing camera. The front camera and/or the rear camera may receive external multimedia data when the device 1400 is in an operation mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 1410 is configured to output and/or input audio signals. For example, the audio component 1410 includes a Microphone (MIC) configured to receive external audio signals when the apparatus 1400 is in operating modes, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may further be stored in the memory 1404 or transmitted via the communication component 1416. In some embodiments, audio component 1410 further includes a speaker for outputting audio signals.

I/O interface 1412 provides an interface between processing component 1402 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor component 1414 includes one or more sensors for providing various aspects of state assessment for the apparatus 1400. For example, the sensor component 1414 may detect an open/closed state of the apparatus 1400, a relative positioning of components, such as a display and keypad of the apparatus 1400, a change in position of the apparatus 1400 or a component of the apparatus 1400, the presence or absence of user contact with the apparatus 1400, an orientation or acceleration/deceleration of the apparatus 1400, and a change in temperature of the apparatus 1400. The sensor assembly 1414 may include a proximity sensor configured to detect the presence of a nearby object in the absence of any physical contact. The sensor assembly 1414 may also include a photosensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 1414 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 1416 is configured to facilitate wired or wireless communication between the apparatus 1400 and other devices. The device 1400 may access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 1416 receives broadcast signals or broadcast related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 1416 further includes a Near Field Communication (NFC) module to facilitate short-range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, Ultra Wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

In an exemplary embodiment, the apparatus 1400 may be implemented by one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors or other electronic components for performing the above-described methods.

In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as the memory 1404 that includes instructions executable by the processor 1420 of the apparatus 1400 to perform the above-described method. For example, the non-transitory computer readable storage medium may be a ROM, a Random Access Memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like.

A non-transitory computer readable storage medium having instructions therein which, when executed by a processor of a device 1400, enable the device 1400 to perform a method of internal short detection, the method comprising:

obtaining rated internal resistance of the battery;

acquiring a preset Open Circuit Voltage (OCV) curve of the battery;

and acquiring the consumed electric quantity through the coulometer.

Optionally, the method further includes:

It should be noted that: in the internal short circuit detection device provided in the above embodiment, when detecting whether the battery has an internal short circuit, only the division of the functional modules is illustrated, and in practical applications, the function distribution may be completed by different functional modules according to needs, that is, the internal structure of the internal short circuit detection device is divided into different functional modules to complete all or part of the functions described above. In addition, the internal short circuit detection device provided by the above embodiment and the internal short circuit detection method embodiment belong to the same concept, and the implementation process thereof is detailed in the method embodiment and is not described herein again.

It should be noted that, the method embodiments provided in the embodiments of the present disclosure can be mutually referred to corresponding apparatus embodiments, and the embodiments of the present disclosure do not limit this. The sequence of the steps of the method embodiments provided in the embodiments of the present disclosure can be appropriately adjusted, and the steps can be correspondingly increased or decreased according to the circumstances, and any method that can be easily conceived by those skilled in the art within the technical scope of the present disclosure is covered by the protection scope of the present disclosure, and therefore, the detailed description is omitted.

The above description is intended to be exemplary only and not to limit the present disclosure, and any modification, equivalent replacement, or improvement made without departing from the spirit and scope of the present disclosure is to be considered as the same as the present disclosure.

Claims

1. An internal short detection method, comprising:

2. The method of claim 1, wherein the determining that the battery has an internal short circuit when the ratio of the consumed power to the lost power is less than the first preset ratio threshold comprises:

obtaining rated internal resistance of the battery;

3. The method according to claim 1 or 2, wherein the obtaining of the power loss of the battery in the first preset time period comprises:

acquiring a preset Open Circuit Voltage (OCV) curve of the battery;

4. The method of claim 1 or 2, wherein the external circuit is connected to a coulometer, and the obtaining the consumed power of the battery-connected external circuit in the first preset time period comprises:

and acquiring the consumed electric quantity through the coulometer.

5. The method of claim 1, wherein the battery and the external circuit are both disposed in an electronic device, the method further comprising:

6. The method of claim 5, further comprising:

7. The method of claim 6, further comprising:

8. The method of claim 2,

the first preset ratio threshold is 95%, and the second preset ratio threshold is 80%.

9. An internal short detection device, comprising:

10. The internal short detection device according to claim 9, wherein the determination module is configured to:

obtaining rated internal resistance of the battery;

11. The internal short detection device according to claim 9 or 10, wherein the first obtaining module is configured to:

acquiring a preset Open Circuit Voltage (OCV) curve of the battery;

12. The internal short detection device according to claim 9 or 10, wherein the external circuit is connected to a coulometer, and the second acquisition module is configured to:

and acquiring the consumed electric quantity through the coulometer.

13. The internal short detection device according to claim 9, wherein the battery and the external circuit are provided in an electronic apparatus, the internal short detection device further comprising:

14. The internal short detection device according to claim 13, further comprising:

15. The internal short detection device according to claim 14, further comprising:

16. The internal short detection device according to claim 10,

17. An internal short detection device, comprising:

a processing component;

a memory for storing executable instructions of the processing component;

wherein the processing component is configured to:

18. A readable storage medium having stored therein instructions which, when run on a processing component, cause the processing component to execute the internal short detection method according to any one of claims 1 to 8.