CN113193541A - Intelligent power-off protection system for lithium battery - Google Patents
Intelligent power-off protection system for lithium battery Download PDFInfo
- Publication number
- CN113193541A CN113193541A CN202110319272.8A CN202110319272A CN113193541A CN 113193541 A CN113193541 A CN 113193541A CN 202110319272 A CN202110319272 A CN 202110319272A CN 113193541 A CN113193541 A CN 113193541A
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- China
- Prior art keywords
- main
- signal
- power battery
- auxiliary
- battery assembly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 16
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 16
- 239000002253 acid Substances 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 5
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
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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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- 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
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
-
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00304—Overcurrent protection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Secondary Cells (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses an intelligent power-off protection system for a lithium battery, which comprises: the main power battery assembly and the auxiliary power battery assembly are connected to the positive end and the negative end of the voltage stabilization connecting end in parallel, a main current detector and a main line disconnector are respectively arranged on a branch circuit connected with the main power battery assembly, an auxiliary current detector and an auxiliary line disconnector are respectively arranged on a branch circuit connected with the auxiliary power battery assembly, a main current detector and a main line disconnector are respectively arranged on a main circuit connected with the main power battery assembly in parallel, a signal receiving part of the control assembly is respectively electrically connected with the main current detector, the auxiliary current detector and the main current detector through signal lines, and an instruction execution part of the control assembly is respectively electrically connected with the main line disconnector, the auxiliary line disconnector and the main line disconnector through signal lines. The invention has the advantages of simple structure, safe use, good use effect and the like.
Description
Technical Field
The invention relates to the technical field of lithium battery protection, in particular to an intelligent power-off protection system for a lithium battery.
Background
With the increasing maturity of new energy automobile technology, new energy automobiles are also increasingly popularized, and the quality of the whole automobile is directly influenced by the performance of the power battery as a core part of the new energy automobile; various manufacturers of large new energy vehicles spend a large amount of resources on power battery charging and discharging equipment, and a set of power battery assembly is expensive, so that the safety problem in the driving process cannot be ignored.
The situation that various faults occur to the power battery inevitably occurs in the driving process, so a large number of devices such as detection, power failure, control and the like are arranged on the charging and discharging equipment of the power battery assembly, but because the power battery assembly has certain fluctuation in the operation data under the normal working state, the data fluctuation is judged as a fault by the detection equipment, so that the power battery assembly which normally operates is cut off and cannot be normally used, namely the battery is frequently cut off, and the vehicle cannot normally run; if the threshold value of the judgment of the detection equipment is changed, the detection sensitivity is reduced, when a real fault occurs, the reaction of the detection equipment is delayed or retarded, and the fault is not processed timely, so that the equipment is damaged.
Disclosure of Invention
The invention aims to provide an intelligent power-off protection system for a lithium battery, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an intelligent power-off protection system for a lithium battery, comprising: the main power battery assembly is an electric main storage battery of the new energy automobile, the main power battery assembly is formed by combining lithium battery packs, the auxiliary power battery assembly is an electric auxiliary storage battery of the new energy automobile, the auxiliary power battery assembly is a common lead-acid battery, the main power battery assembly and the auxiliary power battery assembly are connected to the positive end and the negative end of the voltage stabilizing connection end in parallel, a main current detector and a main circuit breaker are respectively arranged on a branch circuit connected to the main power battery assembly, an auxiliary current detector and an auxiliary circuit breaker are respectively arranged on a branch circuit connected to the auxiliary power battery assembly, a main current detector and a main circuit breaker are respectively arranged on a main circuit connected to the main power battery assembly in parallel, and a signal receiving part of the control assembly is respectively connected with the main current detector through a signal line, The auxiliary current detector is electrically connected with the main line disconnector, the auxiliary line disconnector and the bus disconnector through signal lines, the command execution part of the control assembly can receive a current signal conducted by the current detector, then the current signal is compared with a current threshold value, so that a judged execution signal is obtained, the execution signal is sent to the line disconnector, and the holding, the disconnection and the reconnection of the line disconnector are controlled.
Furthermore, the control assembly comprises a signal receiving module, a signal processing module and a signal sending module, wherein the signal receiving module is used for receiving electronic signals of the current detectors on all the lines, threshold values are arranged in all the lines in the signal processing module, the signal processing module compares the received electronic signals of the currents with corresponding set threshold values to obtain executed instruction signals, and the signal sending module sends the generated instruction signals to the line cutter.
Furthermore, the signal processing module generates a holding instruction signal, a cutting instruction signal and a reconnection instruction signal, and the line cutter correspondingly generates actions of holding, circuit breaking and circuit reconnection.
Compared with the prior art, the invention has the beneficial effects that: the intelligent power-off protection system for the lithium battery overcomes the problem of cut-off of a lithium battery power supply circuit caused by sensitivity of a detector, firstly, two power supply storage batteries are adopted, one is arranged as a main battery and the other is arranged as an auxiliary battery, and when the data detected by the current detector of a branch exceeds a threshold value, a control assembly cuts off a line of the corresponding branch and cuts off a storage battery power supply line, so that normal running of a vehicle cannot be influenced; after the disconnection, the control assembly controls the circuit disconnector to reconnect, when the circuit has no fault, the circuit can be reconnected, when the circuit can not be reconnected, the circuit needs to be repaired nearby, and the circuit of the other storage battery is enough for the vehicle to travel to a repair point; on the whole, when a main circuit breaks down, namely data detected by the total current detector exceeds a threshold value, the control assembly firstly cuts off a power supply circuit of the main power battery assembly, because the main power battery assembly is formed by combining lithium battery packs, the price is high, the safety coefficient is not high enough, a common lead-acid battery of the auxiliary power battery assembly supplies power, the price of the common lead-acid battery is low, the safety coefficient is high, if the data detected by the total current detector still exceeds the threshold value at the moment, the control assembly cuts off a branch circuit of the auxiliary power battery assembly, and the main circuit is cut off at the same time.
The invention has the advantages of simple structure, safe use, good use effect and the like.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Referring to fig. 1, the present invention provides an intelligent power-off protection system for a lithium battery, including: the main power battery assembly is an electric main storage battery of the new energy automobile, the main power battery assembly is formed by combining lithium battery packs, the auxiliary power battery assembly is an electric auxiliary storage battery of the new energy automobile, the auxiliary power battery assembly is a common lead-acid battery, the main power battery assembly and the auxiliary power battery assembly are connected to the positive end and the negative end of the voltage stabilizing connection end in parallel, a main current detector and a main circuit breaker are respectively arranged on a branch circuit connected to the main power battery assembly, an auxiliary current detector and an auxiliary circuit breaker are respectively arranged on a branch circuit connected to the auxiliary power battery assembly, a main current detector and a main circuit breaker are respectively arranged on a main circuit connected to the main power battery assembly in parallel, and a signal receiving part of the control assembly is respectively connected with the main current detector through a signal line, The auxiliary current detector is electrically connected with the main line disconnector, the auxiliary line disconnector and the bus disconnector through signal lines, the command execution part of the control assembly can receive a current signal conducted by the current detector, then the current signal is compared with a current threshold value, so that a judged execution signal is obtained, the execution signal is sent to the line disconnector, and the holding, the disconnection and the reconnection of the line disconnector are controlled.
Furthermore, the control assembly comprises a signal receiving module, a signal processing module and a signal sending module, wherein the signal receiving module is used for receiving electronic signals of the current detectors on all the lines, threshold values are arranged in all the lines in the signal processing module, the signal processing module compares the received electronic signals of the currents with corresponding set threshold values to obtain executed instruction signals, and the signal sending module sends the generated instruction signals to the line cutter.
Furthermore, the signal processing module generates a holding instruction signal, a cutting instruction signal and a reconnection instruction signal, and the line cutter correspondingly generates actions of holding, circuit breaking and circuit reconnection.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. The utility model provides a lithium cell intelligence power-off protection system which characterized in that includes: the main power battery assembly is an electric main storage battery of the new energy automobile, the main power battery assembly is formed by combining lithium battery packs, the auxiliary power battery assembly is an electric auxiliary storage battery of the new energy automobile, the auxiliary power battery assembly is a common lead-acid battery, the main power battery assembly and the auxiliary power battery assembly are connected to the positive end and the negative end of the voltage stabilizing connection end in parallel, a main current detector and a main circuit breaker are respectively arranged on a branch circuit connected to the main power battery assembly, an auxiliary current detector and an auxiliary circuit breaker are respectively arranged on a branch circuit connected to the auxiliary power battery assembly, a main current detector and a main circuit breaker are respectively arranged on a main circuit connected to the main power battery assembly in parallel, and a signal receiving part of the control assembly is respectively connected with the main current detector through a signal line, The auxiliary current detector is electrically connected with the main line disconnector, the auxiliary line disconnector and the bus disconnector through signal lines, the command execution part of the control assembly can receive a current signal conducted by the current detector, then the current signal is compared with a current threshold value, so that a judged execution signal is obtained, the execution signal is sent to the line disconnector, and the holding, the disconnection and the reconnection of the line disconnector are controlled.
2. The system according to claim 1, wherein the control assembly comprises a signal receiving module, a signal processing module and a signal sending module, the signal receiving module is used for receiving electronic signals of the current detectors on the lines, the signal processing module is internally provided with thresholds on the lines, the signal processing module compares the received electronic signals of the currents with the corresponding set thresholds to obtain executed command signals, and the signal sending module sends the generated command signals to the line breaker.
3. The intelligent power-off protection system for the lithium battery as claimed in claim 2, wherein the signal processing module generates a hold command signal, a cut-off command signal and a reconnect command signal, and the line breaker correspondingly generates actions of holding, circuit breaking and circuit reconnecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319272.8A CN113193541A (en) | 2021-03-25 | 2021-03-25 | Intelligent power-off protection system for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110319272.8A CN113193541A (en) | 2021-03-25 | 2021-03-25 | Intelligent power-off protection system for lithium battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113193541A true CN113193541A (en) | 2021-07-30 |
Family
ID=76973798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110319272.8A Pending CN113193541A (en) | 2021-03-25 | 2021-03-25 | Intelligent power-off protection system for lithium battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113193541A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633679A (en) * | 2012-08-28 | 2014-03-12 | 六逸科技股份有限公司 | Electric product, high voltage safety power supply system and high voltage safety protector |
| CN105914333A (en) * | 2015-03-16 | 2016-08-31 | 中国新能源汽车有限公司 | Battery pack and connecting circuits of battery modules |
-
2021
- 2021-03-25 CN CN202110319272.8A patent/CN113193541A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103633679A (en) * | 2012-08-28 | 2014-03-12 | 六逸科技股份有限公司 | Electric product, high voltage safety power supply system and high voltage safety protector |
| CN105914333A (en) * | 2015-03-16 | 2016-08-31 | 中国新能源汽车有限公司 | Battery pack and connecting circuits of battery modules |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20210730 |