CN202145564U - Battery major loop interface protection circuit - Google Patents
Battery major loop interface protection circuit Download PDFInfo
- Publication number
- CN202145564U CN202145564U CN201120043847U CN201120043847U CN202145564U CN 202145564 U CN202145564 U CN 202145564U CN 201120043847 U CN201120043847 U CN 201120043847U CN 201120043847 U CN201120043847 U CN 201120043847U CN 202145564 U CN202145564 U CN 202145564U
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- Prior art keywords
- loop
- contactor
- loop protection
- battery pack
- protection
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Abstract
The utility model relates to a battery major loop interface protection circuit, comprising a loop protection resistor 8, a loop protection switch 9, a measuring circuit and an electric controller 7, characterized in that the loop protection resistor 8 and the loop protection switch 9 are connected in series and then the series circuit is connected with both ends of a contactor 4 to be protected in parallel, the loop protection switch 9 is controlled by the electric controller 7, the measuring circuit can be a current sensor 5 connected with a loop protection resistor 8 in series or a voltage sensor 6 connected with the loop protection resistor 8 or the contactor 4 to be protected in parallel, and the output end of the measuring circuit is connected with the electric controller 7. When the contactor 4 to be protected is turned off and the loop protection switch 9 is turned on, the electric controller 7 determines whether the external load of the major loop satisfies the demands of the battery according to the current or voltage signal output by the measuring circuit. The battery major loop interface protection circuit has the advantages of being capable of preventing over-current caused by external short circuit, preventing the contactor 4 to be protected to be burned caused by excessive loop initial current, and increasing the safety and universality of the battery.
Description
Technical field
The utility model relates to a kind of electric interfaces protective device, belongs to power circuit interface protection technical field.
Background technology
Electric automobile is as the representative of new-energy automobile, owing to its cleaning, economy receive increasing concern.Electric motor car uses the battery pack of high pressure to provide the DC power supply powered vehicle to go, and for example the power battery pack used of electrocar generally has the electric energy of 20kWh approximately, adopts the battery pack about the total voltage 300V that series system forms more, and output current can reach 300A.The high-tension battery group of electric automobile is all being had higher requirement aspect electrical safety and the switching device.Particularly change electric formula battery pack; The storage and the charging process that in whole work period, have a lot of time to be in to leave vehicle; Often alternately insert vehicle electrical systems and charging electrical system; And need between different vehicle even vehicle, intersect use, and the external loading condition changes greatly, and the fail safe of major loop interface, adaptability and anti-abuse performance are outstanding important.Shown in Figure 1 is the interior high-voltage electrical apparatus schematic diagram of conventional batteries, lacks interface protection function, fail safe and anti-abuse poor performance.
Summary of the invention
The purpose of the utility model is to provide a kind of battery pack major loop interface protective circuit, does not correctly insert under the situation of load at battery pack major loop interface, identifies the load condition mistake, prevents the damage of D.C. contactor and external loading.
For realizing above purpose; The technical scheme of the utility model is: loop protection resistance, loop protection switch and measuring circuit are installed in battery pack; Voltage or electric current through detecting the loop protection process change; Judge the size and the character of load, and then judge the fail safe that D.C. contactor is closed.
Detect the loop two kinds of schemes generally can be arranged: tandem plan and parallelly connected scheme.
Tandem plan comprises that the loop guarantor expands resistance, loop protection switch, current sensor and electronic controller four parts.Wherein loop protection resistance is connected with the loop protection switch; Be connected in parallel on a D.C. contactor (being called: protected contactor) two ends after loop protection resistance and the series connection of loop protection switch; The loop protection switch is controlled by electronic controller; Current sensor is connected with loop protection resistance, and the output of current sensor links to each other with electronic controller.
The parallel connection scheme comprises loop protection resistance, loop protection switch, voltage sensor and electronic controller four parts.Wherein loop protection resistance is connected with the loop protection switch; Be connected in parallel on a D.C. contactor (being called: protected contactor) two ends after loop protection resistance and the series connection of loop protection switch; The loop protection switch is controlled by electronic controller; Voltage sensor is parallelly connected with loop protection resistance, and the output of voltage sensor links to each other with electronic controller.
In a battery system, electronic controller can be substituted by battery management system, also can be to be controller independently the control system that also can be made up of a plurality of sub-controllers.
The loop protection switch can be contactor, IGBT, solid-state relay, MOSFET.Can be connected on any in two major loop interfaces of battery pack by the protection contactor.
The guard method of this protective circuit; Use by the protection contactor as last closed contactor during output power on the battery pack major loop; After battery pack major loop interface is connected to load, the closed-loop path protection switch is only being arranged on the battery pack major loop under the state that is broken off by the protection contactor; Judge the state of load according to the signal feedback of current sensor or voltage sensor measurement; Judging according to the state of load when judging that external loading is short circuit, is not allowed to be protected contactor closed by the closed fail safe of protection contactor again.
The utility model can effectively protect battery pack when inserting short circuit load, not export, the D.C. contactor of not ablating when inserting capacitive load.
Description of drawings
Describe the embodiment of the utility model below with reference to accompanying drawings in further detail, identical Reference numeral is represented same or analogous parts in the accompanying drawing, wherein:
Fig. 1 is two kinds of high-voltage electrical apparatus schematic diagrams in the conventional batteries
Fig. 2 is the battery pack inner high voltage electrical schematic diagram of the utility model embodiment one
Fig. 3 is the battery pack inner high voltage electrical schematic diagram of the utility model embodiment two
Description of reference numerals:
1, battery cell 2, fuse 3, D.C. contactor 4, quilt are protected contactor 5, current sensor 6, voltage sensor 7, electronic controller 8, loop protection resistance 9, loop protection switch 10, major loop interface 111, major loop interface 2
Embodiment
For further setting forth the utility model is to reach technological means and the effect that predetermined purpose is taked; Below in conjunction with accompanying drawing and preferred embodiment; To specify according to the embodiment of the utility model, structure, characteristic and effect thereof as after, and in the following detailed description that cooperates with reference to graphic preferred embodiment, can know and appear.Yet the appended graphic usefulness that only provides reference and explanation is not to be used for the utility model is limited.
Embodiment one: a kind of battery pack major loop interface protective circuit comprises: loop protection resistance 8, loop protection switch 9, current sensor 5 and electronic controller 7 four parts.Wherein loop protection resistance 8 is connected with loop protection switch 9; After connecting with loop protection switch 9, loop protection resistance 8 is connected in parallel on a D.C. contactor (being called: protected contactor 4) two ends; Loop protection switch 9 is by electronic controller 7 controls; Current sensor 5 is connected with loop protection resistance 9, and the output of current sensor 5 links to each other with electronic controller 7.
The guard method of this protective circuit is: use by protection contactor 4 as last closed contactor during output power on the battery pack major loop; After battery pack major loop interface 10 and 11 is connected to load; Only having on the battery pack major loop under the state that is broken off by protection contactor 4, closed-loop path protection switch 9, the current signal of measuring according to current sensor 5 is judged the state of load; Judge by the closed fail safe of protection contactor 4 according to the state of load again: if current value is non-vanishing in 9 closed moments of loop protection switch; And be decreased to gradually less than a certain value, then be judged as normally, allow by protection contactor 4 closures; If current value is continuously zero, then be judged as load cut-off, allow by protection contactor 4 closures; If electric current is continuously certain certain value, and should be worth, then be judged as short circuit, not allow to be protected contactor 4 closures near the current value of assembled battery total voltage divided by the resistance gained of loop protection resistance 8; If electric current increases to above certain certain value gradually, and should be worth, then be judged as short circuit, not allow to be protected contactor 4 closures near the current value of assembled battery total voltage divided by the resistance gained of loop protection resistance 8.
Embodiment two: a kind of battery pack major loop interface protective circuit comprises: loop protection resistance 8, loop protection switch 9, voltage sensor 6 and electronic controller 7 four parts.It is characterized in that: wherein loop protection resistance 8 is connected with loop protection switch 9; After connecting with loop protection switch 9, loop protection resistance 8 is connected in parallel on a D.C. contactor (being called: protected contactor 4) two ends; Loop protection switch 9 is by electronic controller 7 controls; Voltage sensor 6 is parallelly connected with loop protection resistance 9, and the output of voltage sensor 6 links to each other with electronic controller 7.
The guard method of this protective circuit is: use by protection contactor 4 as last closed contactor during output power on the battery pack major loop; After battery pack major loop interface 10 and 11 is connected to load; Only having on the battery pack major loop under the state that is broken off by protection contactor 4, closed-loop path protection switch 9, the current signal of measuring according to voltage sensor 6 is judged the state of load; Judge by the closed fail safe of protection contactor 4 according to the state of load again: if magnitude of voltage is non-vanishing in 9 closed moments of loop protection switch; And be decreased to gradually less than a certain value, then be judged as normally, allow by protection contactor 4 closures; If magnitude of voltage is continuously zero, then be judged as load cut-off, allow by protection contactor 4 closures; If magnitude of voltage is continuously certain certain value, and should be worth, then be judged as short circuit, not allow to be protected contactor 4 closures near assembled battery total voltage; If voltage increases to above certain certain value gradually, and should be worth, then be judged as short circuit, not allow to be protected contactor 4 closures near assembled battery total voltage.
Claims (8)
1. battery pack major loop interface protective circuit; Comprise: loop protection resistance, loop protection switch, current sensor and electronic controller four parts; It is characterized in that: wherein loop protection resistance is connected with the loop protection switch; Be connected in parallel on a D.C. contactor after loop protection resistance and the series connection of loop protection switch promptly by protection contactor two ends; The loop protection switch is controlled by electronic controller, and current sensor is connected with loop protection resistance, and the output of current sensor links to each other with electronic controller.
2. battery pack major loop interface protective circuit; Comprise: loop protection resistance, loop protection switch, voltage sensor and electronic controller four parts; It is characterized in that: wherein loop protection resistance is connected with the loop protection switch; Be connected in parallel on a D.C. contactor after loop protection resistance and the series connection of loop protection switch promptly by protection contactor two ends; The loop protection switch is controlled by electronic controller, and voltage sensor is parallelly connected with loop protection resistance, and the output of voltage sensor links to each other with electronic controller.
3. a kind of battery pack major loop interface protective circuit according to claim 1 is characterized in that: current sensor is connected on can measure the position of flowing through by the total current of protection contactor and loop protection resistance on the major loop.
4. a kind of battery pack major loop interface protective circuit according to claim 2 is characterized in that: voltage sensor can be parallel to by protection contactor two ends.
5. a kind of battery pack major loop interface protective circuit according to claim 1 and 2, it is characterized in that: electronic controller can be battery management system.
6. a kind of battery pack major loop interface protective circuit according to claim 1 and 2 is characterized in that: electronic controller can be controller independently, also can be the control system of being made up of a plurality of sub-controllers.
7. a kind of battery pack major loop interface protective circuit according to claim 1 and 2 is characterized in that: the loop protection switch can be contactor, IGBT, solid-state relay, MOSFET.
8. a kind of battery pack major loop interface protective circuit according to claim 1 and 2 is characterized in that: protected contactor can be connected on any in two major loop interfaces of battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120043847U CN202145564U (en) | 2011-02-22 | 2011-02-22 | Battery major loop interface protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120043847U CN202145564U (en) | 2011-02-22 | 2011-02-22 | Battery major loop interface protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202145564U true CN202145564U (en) | 2012-02-15 |
Family
ID=45581491
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120043847U Expired - Lifetime CN202145564U (en) | 2011-02-22 | 2011-02-22 | Battery major loop interface protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202145564U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646960A (en) * | 2011-02-22 | 2012-08-22 | 北京科易动力科技有限公司 | Battery pack primary loop interface protection circuit and protection method |
| CN105006848A (en) * | 2014-04-17 | 2015-10-28 | 中国科学院沈阳自动化研究所 | Intelligent power lithium ion battery maintenance system |
| CN108736080A (en) * | 2018-04-11 | 2018-11-02 | 王震 | The system of power battery pack |
-
2011
- 2011-02-22 CN CN201120043847U patent/CN202145564U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102646960A (en) * | 2011-02-22 | 2012-08-22 | 北京科易动力科技有限公司 | Battery pack primary loop interface protection circuit and protection method |
| CN102646960B (en) * | 2011-02-22 | 2016-10-05 | 北京科易动力科技有限公司 | A kind of battery major loop interface protection circuit and guard method |
| CN105006848A (en) * | 2014-04-17 | 2015-10-28 | 中国科学院沈阳自动化研究所 | Intelligent power lithium ion battery maintenance system |
| CN108736080A (en) * | 2018-04-11 | 2018-11-02 | 王震 | The system of power battery pack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120215 |
|
| CX01 | Expiry of patent term |