CN106772069B - Method and device for detecting battery short circuit - Google Patents
Method and device for detecting battery short circuit Download PDFInfo
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- CN106772069B CN106772069B CN201611085169.7A CN201611085169A CN106772069B CN 106772069 B CN106772069 B CN 106772069B CN 201611085169 A CN201611085169 A CN 201611085169A CN 106772069 B CN106772069 B CN 106772069B
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
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Abstract
The embodiment of the invention provides a method and a device for detecting a battery short circuit. In one aspect, the method comprises: collecting state data of a battery to be detected in the process of charging the battery to be detected, wherein the state data comprises at least one of a voltage signal and a current signal; acquiring target data according to the state data, wherein the target data is used for detecting whether the battery to be detected is short-circuited; the target data includes a peak number of a waveform corresponding to the state data or a peak number of values corresponding to the state data. The technical scheme provided by the embodiment of the invention avoids the situation that the short-circuited battery is detected as the non-short-circuited battery due to the problems of testing environment or the detection device and the like.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of batteries, in particular to a method and a device for detecting battery short circuit.
[ background of the invention ]
In the manufacturing process of the battery, due to reasons of environment or improper operation, the battery may be short-circuited, for example, pole piece dust may be generated in the process of hot-pressing the battery core of the battery, and the generated pole piece dust may pierce through a diaphragm between positive and negative pole pieces of the battery core, so that the short circuit occurs inside the battery.
In order to ensure the safety of the battery during use, the battery needs to be subjected to short circuit detection before the battery leaves a factory. In the prior art, whether the battery is short-circuited is determined by determining an average resistance value in a current convergence domain. And if the average resistance value is less than the specified resistance value, the short circuit is considered to occur in the battery. However, in the above-described inspection process, the battery having a short circuit therein may be inspected as a qualified battery due to problems such as a test environment or the inspection apparatus itself. For example, if a short circuit actually occurs in the detected battery, the average resistance value in the current convergence region obtained from the voltage value and the current value is greater than or equal to the predetermined resistance value due to a poor contact between the detection device and the battery, or unstable voltage when the battery is charged, or the like, and it is detected that the short circuit does not occur in the battery. Therefore, a problem occurs in the prior art in which a short-circuited battery is detected as an un-short-circuited battery.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a method and an apparatus for detecting a battery short circuit, so as to solve the problem in the prior art that a short-circuited battery is detected as an un-short-circuited battery.
In a first aspect, an embodiment of the present invention provides a method for detecting a battery short circuit, including:
collecting state data of a battery to be detected in the process of charging the battery to be detected, wherein the state data comprises at least one of a voltage signal and a current signal;
acquiring target data according to the state data, wherein the target data is used for detecting whether the battery to be detected is short-circuited; the target data includes a peak number of a waveform corresponding to the state data or a peak number of values corresponding to the state data.
The above-described aspects and any possible implementation further provide an implementation, further including: and detecting whether the battery to be detected is short-circuited or not according to the target data.
The above-described aspect and any possible implementation manner further provide an implementation manner, and the step of obtaining the target data according to the state data includes:
performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data;
obtaining a waveform corresponding to the state data according to the digital signal;
the number of peaks of the waveform is obtained.
The above-described aspect and any possible implementation manner further provide an implementation manner, where the step of obtaining target data according to the state data includes:
performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data;
obtaining a numerical value corresponding to the state data according to the digital signal;
the number of peaks in the values is obtained.
As described in the above aspect and any possible implementation manner, there is further provided an implementation manner, where the step of detecting whether the battery to be detected is short-circuited according to the target data includes:
and when the peak number of the waveform corresponding to the state data in the target data is larger than a first designated numerical value, judging the battery to be detected as a short-circuit battery.
As described in the above aspect and any possible implementation manner, there is further provided an implementation manner, where the step of detecting whether the battery to be detected is short-circuited according to the target data includes:
and when the number of peak values in the numerical values corresponding to the state data in the target data is larger than a second specified numerical value, judging the battery to be detected as a short-circuit battery.
The above-described aspects and any possible implementation further provide an implementation, further including:
outputting the target data; and/or the presence of a gas in the gas,
and storing the target data.
The above aspect and any possible implementation manner further provide an implementation manner, and the charging process is pulse charging.
The above-described aspects and any possible implementation further provide an implementation, further including: and outputting a detection result.
One of the above technical solutions has the following beneficial effects: in the embodiment of the invention, in the process of charging the battery to be detected, state data of the battery to be detected, such as a voltage signal and/or a current signal, is acquired, and then corresponding target data, such as the peak number of a waveform corresponding to the state data or the peak number of a numerical value corresponding to the state data, is acquired according to the acquired state data. When the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is a fixed value, and when the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is larger than the fixed value, so that whether the battery to be detected is short-circuited or not can be detected through the target data. Moreover, when a test environment or a detection device itself has a problem that affects the test, the acquired voltage signal and/or current signal may change accordingly, so that the number of peaks of a waveform corresponding to the state data in the target data or the number of peaks in a value corresponding to the state data is greater than the predetermined value. The reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem includes two aspects, that is, the reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem is that the battery itself is a short-circuited battery, and the test environment problem and the detection device problem affect the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data, so that when the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data is greater than the predetermined value, the battery is detected as a short-circuited battery, thereby avoiding the situation that the short-circuited battery is detected as a non-short-circuited battery due to the problems of the test environment or the detection device itself.
In a second aspect, an embodiment of the present invention provides a device for detecting a battery short circuit, including:
the control unit is used for acquiring state data of the battery to be detected in the process of charging the battery to be detected, wherein the state data comprises at least one of a voltage signal and a current signal;
the central processing unit is used for obtaining target data according to the state data, and the target data is used for detecting whether the battery to be detected is short-circuited; the target data includes a peak number of a waveform corresponding to the state data or a peak number of values corresponding to the state data.
The above-mentioned aspects and any possible implementation manners further provide an implementation manner, where the central processing unit is further configured to detect whether the battery to be detected is short-circuited according to the target data.
The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the central processing unit is configured to, when obtaining the target data according to the state data, specifically:
performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data;
obtaining a waveform corresponding to the state data according to the digital signal;
the number of peaks of the waveform is obtained.
The above-mentioned aspect and any possible implementation manner further provide an implementation manner, where the central processing unit is configured to, when obtaining the target data according to the state data, specifically:
performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data;
obtaining a numerical value corresponding to the state data according to the digital signal;
the number of peaks in the values is obtained.
As for the above aspect and any possible implementation manner, an implementation manner is further provided, where the central processing unit is configured to, when detecting whether the battery to be detected is short-circuited according to the target data, specifically:
and when the peak number of the waveform corresponding to the state data in the target data is larger than a first designated numerical value, judging the battery to be detected as a short-circuit battery.
As for the above aspect and any possible implementation manner, an implementation manner is further provided, where the central processing unit is configured to, when detecting whether the battery to be detected is short-circuited according to the target data, specifically:
and when the number of peak values in the numerical values corresponding to the state data in the target data is larger than a second specified numerical value, judging the battery to be detected as a short-circuit battery.
The above-described aspects and any possible implementation further provide an implementation, where the apparatus further includes a first output unit and/or a storage unit;
the first output unit is used for outputting the target data;
the storage unit is used for storing the target data.
The above aspect and any possible implementation manner further provide an implementation manner, and the charging process is pulse charging.
The above-described aspects and any possible implementations further provide an implementation, where the apparatus further includes:
and the second output unit is used for outputting the detection result.
One of the above technical solutions has the following beneficial effects: in the embodiment of the invention, in the process of charging the battery to be detected, state data of the battery to be detected, such as a voltage signal and/or a current signal, is acquired, and then corresponding target data, such as the peak number of a waveform corresponding to the state data or the peak number of a numerical value corresponding to the state data, is acquired according to the acquired state data. When the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is a fixed value, and when the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is larger than the fixed value, so that whether the battery to be detected is short-circuited or not can be detected through the target data. Moreover, when a test environment or a problem of the detection device itself affects the test, the acquired voltage signal and/or current signal may change accordingly, so that the number of peaks of the waveform corresponding to the state data in the target data or the number of peaks in the value corresponding to the state data is greater than the predetermined value. The reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem includes two aspects, that is, the reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem is that the battery itself is a short-circuited battery, and the test environment problem and the detection device problem affect the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data, so that when the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data is greater than the predetermined value, the battery is detected as a short-circuited battery, thereby avoiding the situation that the short-circuited battery is detected as a non-short-circuited battery due to the problems of the test environment or the detection device itself.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
FIG. 1a is a waveform diagram illustrating voltage formation according to an embodiment of the present invention;
FIG. 1b is a waveform diagram illustrating the formation of a current according to an embodiment of the present invention;
FIG. 2a is a waveform diagram illustrating another voltage generation provided by an embodiment of the present invention;
FIG. 2b is a waveform diagram illustrating another current shaping provided by an embodiment of the present invention;
fig. 3 is a schematic flow chart of a method for detecting a battery short circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a device for detecting a battery short circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a device for detecting a battery short circuit according to an embodiment of the present invention.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first and second may be used to describe specified values in embodiments of the present invention, the specified values should not be limited to these terms. These terms are only used to distinguish one designated value from another. For example, a first specified value may also be referred to as a second specified value, and similarly, a second specified value may also be referred to as a first specified value, without departing from the scope of embodiments of the present invention.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
Since the resistance of the battery not short-circuited is a constant value, the resistance of the battery short-circuited is a variable value. When the short circuit of the battery is detected by charging the battery after the charging mode is determined, the number of peak values of waveforms corresponding to the charging voltage and the charging current of the battery without the short circuit is a fixed value, or the number of peaks in the values corresponding to the charging voltage and/or the charging current of the battery in which the short circuit does not occur is a fixed value, and the number of peaks of the waveform corresponding to the charging voltage and the charging current of the short-circuited battery is greater than the fixed value, or the number of peaks in the corresponding values of the charging voltage and the charging current of the battery in which the short circuit occurs is greater than a fixed value, it is therefore possible to determine the number of peaks of the waveform corresponding to the charging voltage and/or the charging current, or whether the battery is short-circuited is detected by the number of peaks in the values corresponding to the charging voltage and/or the charging current.
In the embodiment of the present invention, a pulse charging mode is taken as an example to charge a battery, and an implementation scheme for detecting whether the battery is short-circuited is illustrated. The pulse charging mode can be as follows: the battery is constant current charged using a constant current, and then constant voltage charged using a constant voltage.
As shown in fig. 1a, a waveform diagram of the voltage of a battery without short circuit is shown. When the battery is not short-circuited and is charged by the method, the voltage of the battery forms a waveform corresponding to a peak.
As shown in fig. 1b, a waveform diagram of the current formation of the battery without short circuit is shown. When the battery is not short-circuited and is charged by the method, the current of the battery forms a wave pattern corresponding to a peak.
As shown in fig. 2a, a waveform diagram of the voltage of the battery with short circuit is formed. When the battery is in short circuit and is charged by the method, the number of wave peaks corresponding to a wave form formed by the voltage of the battery is more than 1.
As shown in fig. 2b, the waveform diagram of the current of the battery with short circuit is shown, when the battery is short-circuited and is charged by the method, the number of peaks corresponding to the waveform diagram of the current of the battery is more than 1.
When the test environment or the detection device itself has an influence on the test, the charging voltage and/or the charging current will change accordingly, at this time, the number of peaks in the generated values corresponding to the charging voltage and/or the charging current will be greater than a fixed value, or the number of peaks in the waveform corresponding to the charging voltage and/or the charging current will be greater than a fixed value, and the waveform diagram formed by the voltage and the current is similar to the waveform diagram formed when the battery is short-circuited.
The reason for the change caused by the short-circuit battery, the test environment problem and the detection device problem includes two aspects, that is, on one hand, the battery is the short-circuit battery, and on the other hand, the battery is the test environment and the detection device problem, so when the peak value number of the waveform corresponding to the state data in the target data or the peak value number of the numerical value corresponding to the state data is larger than the fixed value, the battery is detected as the short-circuit battery, thereby avoiding the situation that the short-circuit battery is detected as the non-short-circuit battery due to the test environment or the detection device.
Example one
An embodiment of the present invention provides a method for detecting a battery short circuit, as shown in fig. 3, the method may include the following steps:
301. the method comprises the steps of collecting state data of a battery to be detected in the process of charging the battery to be detected, wherein the state data comprises at least one of a voltage signal and a current signal.
In a specific embodiment, the battery to be tested is charged by using a pulse charging method, wherein the pulse charging method comprises the following steps: constant current charging is performed on the battery by using constant current, and then constant voltage charging is performed on the battery by using constant voltage. And, the number of times of charging when carrying out pulse charging can set up according to actual demand.
302. Acquiring target data according to the state data, wherein the target data is used for detecting whether the battery to be detected is short-circuited; the target data includes a peak number of a waveform corresponding to the state data or a peak number of values corresponding to the state data.
In a specific embodiment, after the target data is acquired, whether the battery to be detected is short-circuited may be detected according to a peak number of a waveform corresponding to the state data in the target data or a peak number of a numerical value corresponding to the state data.
In a specific embodiment, the specific step of obtaining the target data according to the state data includes: performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data; obtaining a waveform corresponding to the state data according to the digital signal; then, the number of peaks of the waveform is obtained.
Specifically, since the acquired voltage signal and/or current signal is an analog signal, analog-to-digital conversion needs to be performed on the voltage signal and/or current signal to obtain a corresponding digital signal, and then the peak number of the waveform can be determined after a corresponding waveform is obtained according to the digital information.
In another specific embodiment, the specific step of obtaining the target data according to the state data includes: performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data; obtaining a numerical value corresponding to the state data according to the digital signal; the number of peaks in the values is obtained.
Specifically, a comparison may be made between the obtained values, and when there is a value greater than one of two values adjacent thereto and greater than or equal to the other of the two values adjacent thereto, the value is determined to be a peak, and the number of peaks in the plurality of values may be obtained by this method.
In a specific embodiment, the detecting whether the battery to be detected is short-circuited according to the target data includes: when the number of peak values of the waveform corresponding to the state data in the target data is larger than a first designated value, judging the battery to be detected as a short-circuit battery; and when the number of peak values of the waveform corresponding to the state data in the target data is less than or equal to a first designated value, judging the battery to be detected as a normal battery.
Taking the above-mentioned pulsed charging as an example, the magnitude of the first specified value may be 1.
In a specific embodiment, the detecting whether the battery to be detected is short-circuited according to the target data includes: when the number of peak values in numerical values corresponding to the state data in the target data is larger than a second specified numerical value, judging the battery to be detected as a short-circuit battery; and when the number of peak values in the numerical values corresponding to the state data in the target data is less than or equal to a second specified numerical value, judging the battery to be detected as a normal battery.
In a specific embodiment, after the detection of the battery to be detected is completed, the detection result is output. Specifically, the detection result is output to the user, so that the user can be reminded whether the short circuit occurs to the battery to be detected currently detected, the user is prevented from manually judging the battery, and the detection efficiency is improved.
Taking the above mentioned pulsed charging as an example, the magnitude of the second specified value may be 1.
In a particular embodiment, after obtaining the target data, the target data may be output; and/or the target data may be stored.
Specifically, after the target data is output, a user can visually see the target data corresponding to the battery to be tested, and the user can manually judge whether the battery is a short-circuit battery according to the peak number of the waveform corresponding to the state data in the target data or the peak number of the numerical value corresponding to the state data.
In addition, the target data can be stored for the production or recording of the data, so that the target data can be read from the storage space when the target data is needed.
In the embodiment of the invention, in the process of charging the battery to be detected, state data of the battery to be detected, such as a voltage signal and/or a current signal, is acquired, and then corresponding target data, such as the peak number of a waveform corresponding to the state data or the peak number of a numerical value corresponding to the state data, is acquired according to the acquired state data. When the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is a fixed value, and when the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is larger than the fixed value, so that whether the battery to be detected is short-circuited or not can be detected through the target data. Moreover, when a test environment or a problem of the detection device itself affects the test, the acquired voltage signal and/or current signal may change accordingly, so that the number of peaks of the waveform corresponding to the state data in the target data or the number of peaks in the value corresponding to the state data is greater than the predetermined value. The reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem includes two aspects, that is, the reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem is that the battery itself is a short-circuited battery, and the test environment problem and the detection device problem affect the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data, so that when the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data is greater than the predetermined value, the battery is detected as a short-circuited battery, thereby avoiding the situation that the short-circuited battery is detected as a non-short-circuited battery due to the problems of the test environment or the detection device itself.
Example two
To further illustrate the technical idea and implementation manner of the embodiment of the present invention, the embodiment of the present invention will be described in detail with reference to specific application scenarios, and specifically, the method for detecting a battery short circuit may be applied to a device for detecting a battery short circuit, where the device includes: as shown in fig. 4, the method for detecting a battery short circuit may include the following steps:
1. the human-computer interface 41 obtains a charging mode input by the user, where the charging mode includes what charging method is used to charge the battery, and a current value and a voltage value used when charging the battery, specifically, taking pulse charging as an example for charging the battery, where the pulse charging includes: constant current charging is carried out on the battery by using a constant current of 0.5C, and then constant voltage charging is carried out on the battery by using a constant voltage of 4.5V, wherein the charging times are 1.
2. The human-machine interface 41 sends the charging pattern to the central processing unit 42.
3. The central processing unit 42 transmits the charging mode to the control unit 43.
4. The control unit 43 controls the power supply 44 to charge the battery according to the charging mode.
Specifically, when the control unit 43 controls the power supply 44 to charge the battery, the battery is first subjected to constant current charging using a constant current of 0.5C, and then subjected to constant voltage charging using a constant voltage of 4.5V, and the number of charging times is 1.
5. The control unit 43 collects a voltage signal and a current signal of the battery.
6. The control unit 43 sends the collected voltage signal and current signal to the central processing unit 42.
7. The central processing unit 42 performs analog-to-digital conversion on the voltage signal and the current signal to obtain a digital signal corresponding to the voltage signal and a digital signal corresponding to the current signal.
8. The central processing unit 42 generates a waveform diagram corresponding to the voltage signal according to the digital signal corresponding to the voltage signal; and generating a waveform diagram corresponding to the current signal according to the digital signal corresponding to the current signal.
9. The central processing unit outputs 42 the waveform diagram corresponding to the voltage signal and the waveform diagram corresponding to the current signal to the human interface 41, and stores the waveform diagram corresponding to the voltage signal and the waveform diagram corresponding to the current signal in the storage unit 45.
10. The central processing unit 42 determines the number of peaks of the waveform corresponding to the voltage signal from the waveform corresponding to the voltage signal, and determines the number of peaks of the waveform corresponding to the current signal from the waveform corresponding to the current signal.
11. The central processing unit 42 detects whether the battery is short-circuited based on the number of peaks of the waveform pattern corresponding to the voltage signal and the number of peaks of the waveform pattern corresponding to the current signal.
Specifically, when the number of peaks of the waveform corresponding to the voltage signal is greater than 1, and/or the number of peaks of the waveform corresponding to the current signal is greater than 1, the occurrence of the short circuit of the battery is detected.
12. The central processing unit 42 outputs the detection result to the human-machine interaction interface 41.
13. The human-computer interaction interface 41 displays the detection result, so that the user can browse the detection result on the human-computer interaction interface 41.
The embodiment of the invention further provides an embodiment of a device for realizing the steps and the method in the embodiment of the method.
EXAMPLE III
An embodiment of the present invention provides a device for detecting a battery short circuit, as shown in fig. 5, the device includes:
the control unit 51 is configured to acquire state data of a battery to be detected in a charging process of the battery to be detected, where the state data includes at least one of a voltage signal and a current signal;
the central processing unit 52 is configured to obtain target data according to the state data, where the target data is used to detect whether the battery to be detected is short-circuited; the target data includes a peak number of a waveform corresponding to the state data or a peak number of values corresponding to the state data.
In a specific embodiment, the central processing unit 52 is further configured to detect whether the battery to be detected is short-circuited according to the target data.
In a specific embodiment, when the central processing unit 52 is configured to obtain the target data according to the state data, it is specifically configured to: performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data; obtaining a waveform corresponding to the state data according to the digital signal; the number of peaks of the waveform is obtained.
In a specific embodiment, when the central processing unit 52 is configured to obtain the target data according to the state data, it is specifically configured to: performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data; obtaining a numerical value corresponding to the state data according to the digital signal; the number of peaks in the values is obtained.
In a specific embodiment, the central processing unit 52 is configured to, when detecting whether the battery to be detected is short-circuited according to the target data, specifically: and when the peak number of the waveform corresponding to the state data in the target data is larger than a first designated numerical value, judging the battery to be detected as a short-circuit battery.
In a specific embodiment, the central processing unit 52 is configured to, when detecting whether the battery to be detected is short-circuited according to the target data, specifically: and when the number of peak values in the numerical values corresponding to the state data in the target data is larger than a second specified numerical value, judging the battery to be detected as a short-circuit battery.
In a particular embodiment, the apparatus further comprises a first output unit 53 and/or a storage unit 54;
the first output unit 53, configured to output the target data;
the storage unit 54 is configured to store the target data.
In a specific embodiment, the charging process is pulsed charging.
In a specific embodiment, the apparatus further comprises: and a second output unit 55 for outputting the detection result.
Since each unit in this embodiment can execute the method shown in the first embodiment, reference may be made to the related description of the first embodiment for a part of this embodiment that is not described in detail.
In the embodiment of the invention, in the process of charging the battery to be detected, state data of the battery to be detected, such as a voltage signal and/or a current signal, is acquired, and then corresponding target data, such as the peak number of a waveform corresponding to the state data or the peak number of a numerical value corresponding to the state data, is acquired according to the acquired state data. When the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is a fixed value, and when the battery to be detected is short-circuited, the peak value number of the waveform corresponding to the state data or the peak value number in the numerical value corresponding to the state data is larger than the fixed value, so that whether the battery to be detected is short-circuited or not can be detected through the target data. Moreover, when a test environment or a problem of the detection device itself affects the test, the acquired voltage signal and/or current signal may change accordingly, so that the number of peaks of the waveform corresponding to the state data in the target data or the number of peaks in the value corresponding to the state data is greater than the predetermined value. The reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem includes two aspects, that is, the reason for the change caused by the short-circuited battery, the test environment problem and the detection device problem is that the battery itself is a short-circuited battery, and the test environment problem and the detection device problem affect the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data, so that when the peak number of the waveform corresponding to the state data in the target data or the peak number of the value corresponding to the state data is greater than the predetermined value, the battery is detected as a short-circuited battery, thereby avoiding the situation that the short-circuited battery is detected as a non-short-circuited battery due to the problems of the test environment or the detection device itself.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) or a Processor (Processor) to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for detecting a short circuit in a battery, the method comprising:
collecting state data of a battery to be detected in the process of charging the battery to be detected, wherein the state data comprises at least one of a voltage signal and a current signal;
performing analog-to-digital conversion on the state data to obtain a digital signal corresponding to the state data;
obtaining a waveform or a corresponding numerical value corresponding to the state data according to the digital signal;
obtaining the peak number of the waveform or the peak number in the numerical values, wherein the peak number of the waveform or the peak number in the numerical values is used for detecting whether the battery to be detected is short-circuited;
detecting whether the battery to be detected is short-circuited or not according to the peak number of the waveform; or detecting whether the battery to be detected is short-circuited according to the number of peak values in the numerical values;
the step of detecting whether the battery to be detected is short-circuited or not according to the peak number of the waveform comprises the following steps:
when the number of the peak values of the waveform is larger than a first designated value, judging the battery to be detected as a short-circuit battery;
according to the number of the peak values in the numerical values, the step of detecting whether the battery to be detected is short-circuited comprises the following steps:
and when the number of the peak values in the numerical values is larger than a second specified numerical value, judging the battery to be detected as a short-circuit battery.
2. The method of claim 1, further comprising:
outputting the number of peaks of the waveform or the number of peaks in the values; and/or the presence of a gas in the gas,
storing the number of peaks of the waveform or the number of peaks in the values.
3. The method of claim 1, wherein the charging is pulsed.
4. The method of claim 1, further comprising:
and outputting a detection result.
5. A device for detecting a short circuit in a battery, the device comprising:
the control unit is used for acquiring state data of the battery to be detected in the process of charging the battery to be detected, wherein the state data comprises at least one of a voltage signal and a current signal;
the central processing unit is used for carrying out analog-to-digital conversion on the state data so as to obtain a digital signal corresponding to the state data; obtaining a waveform or a corresponding numerical value corresponding to the state data according to the digital signal; obtaining a number of peaks of the waveform or a number of peaks in the values; the peak number of the waveform or the peak number of the numerical values is used for detecting whether the battery to be detected is short-circuited;
the central processing unit is also used for detecting whether the battery to be detected is short-circuited or not according to the peak number of the waveform; or detecting whether the battery to be detected is short-circuited according to the number of peak values in the numerical values;
the central processing unit is configured to, when detecting whether the battery to be detected is short-circuited according to the peak number of the waveform, specifically:
when the number of the peak values of the waveform is larger than a first designated value, judging the battery to be detected as a short-circuit battery;
the central processing unit is configured to, when detecting whether the battery to be detected is short-circuited according to the number of peaks in the numerical values, specifically:
and when the number of the peak values in the numerical values is larger than a second specified numerical value, judging the battery to be detected as a short-circuit battery.
6. The apparatus of claim 5, further comprising a first output unit and/or a storage unit;
the first output unit is used for outputting the peak number of the waveform or the peak number in the numerical values;
the storage unit is used for storing the peak number of the waveform or the peak number in the numerical values.
7. The apparatus of claim 5, wherein the charging process is pulsed charging.
8. The apparatus of claim 5, wherein the apparatus further comprises:
and the second output unit is used for outputting the detection result.
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| CN201611085169.7A CN106772069B (en) | 2016-11-30 | 2016-11-30 | Method and device for detecting battery short circuit |
| PCT/CN2017/093207 WO2018099093A1 (en) | 2016-11-30 | 2017-07-17 | Battery short-circuit detection method and device |
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| CN201611085169.7A CN106772069B (en) | 2016-11-30 | 2016-11-30 | Method and device for detecting battery short circuit |
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| CN106772069B (en) * | 2016-11-30 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Method and device for detecting battery short circuit |
| CN108226693B (en) * | 2017-12-18 | 2020-02-07 | 清华大学 | Method and apparatus for detecting short circuit in battery in real time, and computer-readable storage medium |
| CN110133530A (en) * | 2019-05-16 | 2019-08-16 | 深圳市博诺技术有限公司 | Battery state detecting device and method |
| CN111722129B (en) * | 2020-06-01 | 2023-08-15 | 国联汽车动力电池研究院有限责任公司 | Battery micro-short circuit detection method and system |
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| WO2004021498A1 (en) * | 2002-08-29 | 2004-03-11 | Matsushita Electric Industrial Co., Ltd. | Method for testing precursor of secondary cell, its testing instrument, and method for manufacturing secondary cell using the method |
| KR102210162B1 (en) * | 2013-03-13 | 2021-02-02 | 티악스 엘엘씨 | System and methods for detection of internal shorts in batteries |
| CN104347895A (en) * | 2013-07-23 | 2015-02-11 | 海洋王（东莞）照明科技有限公司 | Test method of lithium battery short circuit protection |
| DE102014204956A1 (en) * | 2014-03-18 | 2015-09-24 | Robert Bosch Gmbh | Method for detecting anomalies in a battery cell and short-circuit sensor |
| CN105527583B (en) * | 2016-02-05 | 2018-08-03 | 华霆（常州）动力技术有限公司 | Battery pack self discharge detection method, battery controller and system |
| CN105974330A (en) * | 2016-07-27 | 2016-09-28 | 上海市计量测试技术研究院 | Battery short circuit test device and use method thereof |
| CN106772069B (en) * | 2016-11-30 | 2020-05-05 | 宁德时代新能源科技股份有限公司 | Method and device for detecting battery short circuit |
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| US4376266A (en) * | 1979-10-15 | 1983-03-08 | Jaeger | Device for the monitoring of peak values of a nonperiodic phenomenon with a low recurrence rate |
| JPS58117470A (en) * | 1981-12-29 | 1983-07-13 | Japan Storage Battery Co Ltd | Battery monitor |
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| WO2018099093A1 (en) | 2018-06-07 |
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