CN111413644A - Short circuit recovery detection method of energy storage battery management system - Google Patents
Short circuit recovery detection method of energy storage battery management system Download PDFInfo
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- CN111413644A CN111413644A CN202010342809.8A CN202010342809A CN111413644A CN 111413644 A CN111413644 A CN 111413644A CN 202010342809 A CN202010342809 A CN 202010342809A CN 111413644 A CN111413644 A CN 111413644A
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- Prior art keywords
- short circuit
- detection method
- energy storage
- preset
- recovery
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
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- General Physics & Mathematics (AREA)
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Abstract
The invention relates to a short circuit recovery detection method of an energy storage battery management system, which is applied to the short circuit of the system and comprises the following steps: s1, acquiring a short-circuit signal, controlling two MOS switches to be switched off, and starting load AD signal detection after a first preset delay time; s2, reading the AD signal value, judging the relation between the AD signal value and a preset voltage range value to determine whether the system is recovered, wherein when the AD signal value is larger than a preset upper limit value, the recovery is not allowed, and when the AD signal value is smaller than a preset lower limit value, the recovery is allowed; when the system allows recovery, the two MOS switches are started after a second preset delay time, and in the process, if the system does not allow recovery, the system is re-timed. The short circuit recovery detection method of the energy storage battery management system can effectively protect the service life of the MOS switch, reduce after-sale maintenance and claim risks, and can protect the battery pack from being damaged due to short circuit detection.
Description
Technical Field
The invention belongs to the technical field of short circuit recovery detection of a battery management system, and particularly relates to a short circuit detection method of an energy storage battery management system.
Background
The hardware circuit of the energy storage battery management system comprises two MOS switches, and when a short circuit occurs, the two MOS switches are all disconnected, so that the whole circuit can not detect the current any more, and the short circuit fault can not be judged to disappear.
In the existing control technology, after the fault occurs, the system closes the two MOS switches again after a certain time (1min) to perform short circuit detection.
Therefore, the existing control technology has the following technical defects: whether the short circuit is recovered or not can not be judged on time; the MOS switch is moved back and forth to cause the service life of hardware to be reduced; the repeated detection consumes power continuously, and finally the battery pack is damaged.
Disclosure of Invention
The invention aims to solve the problems and provide a short circuit recovery detection method of an energy storage battery management system, which has a simple structure and reasonable design.
The invention realizes the purpose through the following technical scheme:
a short circuit recovery detection method of an energy storage battery management system is applied to the occurrence of short circuit of the system, and comprises the following steps:
s1, acquiring a short-circuit signal, controlling two MOS switches to be switched off, and starting load AD signal detection after a first preset delay time;
and S2, reading the AD signal value, judging the relation between the AD signal value and a preset voltage range value to determine whether the system is recovered, wherein when the AD signal value is larger than a preset upper limit value, the recovery is not allowed, and when the AD signal value is smaller than a preset lower limit value, the recovery is allowed.
As a further optimization scheme of the invention, when the system allows recovery, the two MOS switches are started after the second preset delay time, and in the process, if the system does not allow recovery, timing is restarted to prevent jitter and jump of the AD value in the judgment process.
As a further preferable aspect of the present invention, the short circuit recovery detection method further includes stopping the detection if the lowest voltage of the battery pack is lower than a set value during the detection.
As a further optimization scheme of the present invention, the first preset delay time is 10 s.
As a further optimization scheme of the invention, the preset upper limit value is 2500mv, and the preset lower limit value is 650 mv.
As a further optimization scheme of the present invention, the second preset delay time is 200 s.
As a further optimization of the invention, the set value is 1800 mv.
As a further optimization scheme of the present invention, when the AD signal value is between the preset upper limit value and the preset lower limit value, the last calculation result is kept unchanged.
The invention has the beneficial effects that:
1) the invention can effectively protect the service life of the MOS switch and reduce the after-sale maintenance and claim risks;
2) the invention can protect the battery pack from being damaged due to short circuit detection.
Drawings
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1, a short-circuit recovery detection method for an energy storage battery management system is applied when a system is short-circuited, and the method includes:
s1, acquiring a short-circuit signal, controlling two MOS switches to be switched off, and starting load AD signal detection after a first preset delay time of 10s, wherein the AD signal represents an external load condition;
s2, reading an AD signal value, judging the relation between the AD signal value and a preset voltage range value to determine whether the system is recovered, artificially enabling an external real load to exist and not allowing recovery when the AD signal value is larger than a preset upper limit value of 2500mv, and considering that the external real load does not exist and allowing recovery when the AD signal value is smaller than a preset lower limit value of 650 mv; when the AD signal value is between the preset upper limit value and the preset lower limit value, the last calculation result is kept unchanged, so that the system can recover two MOS switches to enable the system to recover to a normal operation state from an open circuit state at the first time when the real load is cut off from the outside;
when the system is allowed to recover, the two MOS switches are started after the second preset delay time is 200s, in the process, if the system is not allowed to recover, timing is performed again, the jitter and jump of an AD value in the judgment process are prevented, the stability and the safety of the system in the open circuit recovery process are increased, the condition that an external load exists in the recovery process is prevented, the service lives of the MOS switches can be effectively protected, and the after-sale maintenance and claim risks are reduced;
the short circuit recovery detection method also comprises the step of stopping detection if the lowest voltage of the battery pack is lower than the set value 1800mv in the detection process, and the battery pack does not recover under the condition of undervoltage of the battery pack, so that the battery pack is prevented from being damaged, and the battery pack can be protected from being damaged due to short circuit recovery detection.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. A short circuit recovery detection method of an energy storage battery management system is applied to the occurrence of short circuit of the system, and is characterized by comprising the following steps:
s1, acquiring a short-circuit signal, controlling two MOS switches to be switched off, and starting load AD signal detection after a first preset delay time;
and S2, reading the AD signal value, judging the relation between the AD signal value and a preset voltage range value to determine whether the system is recovered, wherein when the AD signal value is larger than a preset upper limit value, the recovery is not allowed, and when the AD signal value is smaller than a preset lower limit value, the recovery is allowed.
2. The short circuit recovery detection method of the energy storage battery management system according to claim 1, characterized in that: and when the system allows recovery, the two MOS switches are started after the second preset delay time, and in the process, if the system does not allow recovery, timing is restarted to prevent the jitter and jump of the AD value in the judgment process.
3. The short circuit recovery detection method of the energy storage battery management system according to claim 2, characterized in that: the short circuit recovery detection method further includes stopping the detection if the lowest voltage of the battery pack is lower than a set value during the detection.
4. The short circuit recovery detection method of the energy storage battery management system according to claim 1, characterized in that: the first preset delay time is 10 s.
5. The short circuit recovery detection method of the energy storage battery management system according to claim 1, characterized in that: the preset upper limit value is 2500mv, and the preset lower limit value is 650 mv.
6. The short circuit recovery detection method of the energy storage battery management system according to claim 2, characterized in that: the second preset delay time is 200 s.
7. The short circuit recovery detection method of the energy storage battery management system according to claim 3, characterized in that: the set point is 1800 mv.
8. The short circuit recovery detection method of the energy storage battery management system according to claim 1, characterized in that: and when the AD signal value is between the preset upper limit value and the preset lower limit value, keeping the last calculation result unchanged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010342809.8A CN111413644A (en) | 2020-04-27 | 2020-04-27 | Short circuit recovery detection method of energy storage battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010342809.8A CN111413644A (en) | 2020-04-27 | 2020-04-27 | Short circuit recovery detection method of energy storage battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111413644A true CN111413644A (en) | 2020-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010342809.8A Pending CN111413644A (en) | 2020-04-27 | 2020-04-27 | Short circuit recovery detection method of energy storage battery management system |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829031A (en) * | 2005-03-03 | 2006-09-06 | 中兴通讯股份有限公司 | Short-circuit protection circuit with self-recovering function |
| CN101944715A (en) * | 2010-08-31 | 2011-01-12 | 深圳拓邦股份有限公司 | Load short-circuit protection circuit |
| CN106451367A (en) * | 2016-11-24 | 2017-02-22 | 欣旺达电子股份有限公司 | Lithium battery short circuit protection method and system |
| CN206076930U (en) * | 2016-08-22 | 2017-04-05 | 丁雪 | Li battery protection IC with excessively stream and short-circuit protection release function |
| CN209805407U (en) * | 2019-03-19 | 2019-12-17 | 浙江大华技术股份有限公司 | Short-circuit protection circuit |
-
2020
- 2020-04-27 CN CN202010342809.8A patent/CN111413644A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1829031A (en) * | 2005-03-03 | 2006-09-06 | 中兴通讯股份有限公司 | Short-circuit protection circuit with self-recovering function |
| CN101944715A (en) * | 2010-08-31 | 2011-01-12 | 深圳拓邦股份有限公司 | Load short-circuit protection circuit |
| CN206076930U (en) * | 2016-08-22 | 2017-04-05 | 丁雪 | Li battery protection IC with excessively stream and short-circuit protection release function |
| CN106451367A (en) * | 2016-11-24 | 2017-02-22 | 欣旺达电子股份有限公司 | Lithium battery short circuit protection method and system |
| CN209805407U (en) * | 2019-03-19 | 2019-12-17 | 浙江大华技术股份有限公司 | Short-circuit protection circuit |
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Application publication date: 20200714 |
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| RJ01 | Rejection of invention patent application after publication |