CN203387175U - Battery management system voltage surge protection circuit applicable to electric vehicles - Google Patents
Battery management system voltage surge protection circuit applicable to electric vehicles Download PDFInfo
- Publication number
- CN203387175U CN203387175U CN201320460266.5U CN201320460266U CN203387175U CN 203387175 U CN203387175 U CN 203387175U CN 201320460266 U CN201320460266 U CN 201320460266U CN 203387175 U CN203387175 U CN 203387175U
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- CN
- China
- Prior art keywords
- management system
- protection circuit
- battery management
- transient voltage
- negative electrode
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- Protection Of Static Devices (AREA)
Abstract
The utility model relates to a battery management system voltage surge protection circuit applicable to electric vehicles, and belongs to the technical field of the safety of a battery management system. The battery voltage surge protection circuit provided by the utility model solves problems of poor voltage suppression effect and large size of an existing protection circuit of the battery management system (BMS). One end of a first resettable fuse Rp1 of the voltage surge protection circuit is connected with a positive electrode Vi+ of a tested single battery, the other end of the first resettable fuse Rp1 is connected with a negative electrode of a transient voltage suppression diode Zt, a positive electrode of the transient voltage suppression diode Zt is connected with one end of a second resettable fuse Rp2, the other end of the second resettable fuse Rp2 is connected with a negative electrode Vi- of the tested single battery, the negative electrode of the transient voltage suppression diode Zt is a positive electrode output end of the protection circuit, and the positive electrode of the transient voltage suppression diode Zt is a negative electrode output end of the protection circuit. The protection circuit provided by the utility model is used for voltage surge protection of the battery management system.
Description
Technical field
The utility model relates to the battery management system voltage surge protective circuit that is applicable to electric automobile, belongs to the safe practice field of battery management system.
Background technology
Existing battery management system BMS, in the process of test lithium battery voltage, tends to occur the surge voltage of hundreds of volts on the p-wire that connects battery, if do not add protection, will damage BMS.
In the conventional method of protection BMS, adopt common voltage stabilizing didoe to be absorbed surge voltage, its absorbability is poor, only has several milliamperes, and the moment therefore arrived at surge, the voltage inhibitory action is poor; Adopt in addition piezo-resistance as the peak restrained element in circuit, during the piezo-resistance action, can produce larger electric current in circuit, make stability and the poor reliability of system; Simultaneously, the complex structure of existing protective circuit, volume is large, can not directly be integrated in battery management system BMS.
The utility model content
The utility model purpose is in order to solve the poor and bulky problem of protective circuit voltage inhibitory action of existing BMS, a kind of battery management system voltage surge protective circuit that is applicable to electric automobile to be provided.
The battery management system voltage surge protective circuit that is applicable to electric automobile described in the utility model, it forms from recovering insurance and transient voltage suppressor diode from recovering insurance, second by first,
The first end from the recovery insurance connects the positive electrode V of tested monocell
i+, the first negative electrode from the other end connection transient voltage suppressor diode that recovers insurance, the anodic bonding second of transient voltage suppressor diode is from an end that recovers insurance, and second other end from the recovery insurance connects the negative electrode V of tested monocell
i-, the cathode output end that the negative electrode of transient voltage suppressor diode is protective circuit, the cathode output end that the anode of transient voltage suppressor diode is protective circuit.
The reverse breakdown voltage of described transient voltage suppressor diode is 5V.
Advantage of the present utility model: the utility model does not adopt in art technology the conventional design thinking to surge restraint circuit, but adopt transient voltage suppressor diode to realize Surge suppression, that is: overcome prior art prejudice, and the technique effect of this kind of design acquisition is compared with prior art very outstanding, specifically has:
(1) reaction speed is fast, current capacity is large:
The utility model adopts the detecting element of transient voltage suppressor diode as surge voltage, and protection speed is very fast, can reach nanosecond.The immediate current of transient voltage suppressor diode can reach tens amperes, the absorbability of surge voltage is far longer than to several milliamperes of the traditional circuit that adopts common voltage stabilizing didoe.Therefore the moment arrived at surge has good voltage inhibitory action.
(2) impedance is little, the blocking-up electric current is little:
The blocking element used in surge protection circuit is for insuring from recovery, and the resistance of its non-blocking state only has tens ohm, and the pressure drop of generation is very little, very little on follow-up System of voltage acquisition impact.When certainly recovering the insurance blocking-up, blocking-up maintains electric current and only has several milliamperes, heats up not obvious.Surge restraint circuit adopts the guard method in the whole loop of blocking-up and only uses the method for piezo-resistance to compare, and guard period does not have large electric current, and stability and the reliability of system obviously improve.
(3) little, the unlimited action of volume:
The circuit element of described surge protection circuit is few, can directly be installed on printed circuit board (PCB).The blocking element adopted in circuit is from recovering insurance, comparing with traditional disposable fuse, after it enters blocking state, do not need manual intervention, after disappearing, surge voltage can automatically restore to conducting state, and can perseveration, there is no the restriction of number of times.
In the battery management system and battery protecting plate that can be applicable to series battery of described surge protection circuit, in the battery management system that is particularly useful for electric automobile is used.
The accompanying drawing explanation
Fig. 1 is the circuit theory diagrams that are applicable to the battery management system voltage surge protective circuit of electric automobile described in the utility model.
Embodiment
Embodiment one: below in conjunction with Fig. 1, present embodiment is described, the described battery management system voltage surge protective circuit that is applicable to electric automobile of present embodiment, it insures R by first from recovery
p1, second from recovering insurance R
p2with transient voltage suppressor diode Z
tform,
First from recovering insurance R
p1an end connect the positive electrode V of tested monocell
i+, first from recovering insurance R
p1the other end connect transient voltage suppressor diode Z
tnegative electrode, transient voltage suppressor diode Z
tanodic bonding second from recovering insurance R
p2an end, second from recovering insurance R
p2the other end connect the negative electrode V of tested monocell
i-, transient voltage suppressor diode Z
tnegative electrode be protective circuit cathode output end, transient voltage suppressor diode Z
tthe anode cathode output end that is protective circuit.
Embodiment two: below in conjunction with Fig. 1, present embodiment is described, present embodiment is described further execution mode one, the described transient voltage suppressor diode Z of present embodiment
treverse breakdown voltage be 5V.
Operation principle: shown in Fig. 1, V
i+and V
i-with the positive and negative electrode of tested monocell, be connected respectively.Under normal circumstances, V
i+and V
i-pressure reduction be 2.8V～4.5V.First from recovering insurance R
p1insure R with second from recovery
p2operating voltage be greater than 400V.V
o+and V
o-be respectively cathode output end and the cathode output end of voltage surge protective circuit, its output voltage signal is connected to the voltage detecting input of battery management system BMS.
Work as V
i+-V
i-during≤5V, Z
tin reverse blocking state, R
p1and R
p2for conducting state.V
o+=V
i+，V
o-=V
i-。
Work as V
i+-V
i-during 5V, Z
treverse breakdown, the voltage clamping at its two ends is in about 5V, and reverse current moment can reach tens amperes.R
p1and R
p2change rapidly blocking state into by conducting state.V
o+-V
o-maintain Z
tclamp voltage on.Work as V
i+-V
i-return to 5V when following, Z
tbe transformed into reverse blocking state, R
p1and R
p2revert to conducting state, V
o+=V
i+, V
o-=V
i-.Circuit reverts to normal operating conditions.
Claims (2)
1. a battery management system voltage surge protective circuit that is applicable to electric automobile, is characterized in that, it insures (R by first from recovery
p1), second from recovering insurance (R
p2) and transient voltage suppressor diode (Z
t) form,
First from recovering insurance (R
p1) an end connect the positive electrode V of tested monocell
i+, first from recovering insurance (R
p1) the other end connect transient voltage suppressor diode (Z
t) negative electrode, transient voltage suppressor diode (Z
t) anodic bonding second from recovering insurance (R
p2) an end, second from recovering insurance (R
p2) the other end connect the negative electrode V of tested monocell
i-, transient voltage suppressor diode (Z
t) negative electrode be protective circuit cathode output end, transient voltage suppressor diode (Z
t) the anode cathode output end that is protective circuit.
2. the battery management system voltage surge protective circuit that is applicable to electric automobile according to claim 1, is characterized in that described transient voltage suppressor diode (Z
t) reverse breakdown voltage be 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320460266.5U CN203387175U (en) | 2013-07-31 | 2013-07-31 | Battery management system voltage surge protection circuit applicable to electric vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320460266.5U CN203387175U (en) | 2013-07-31 | 2013-07-31 | Battery management system voltage surge protection circuit applicable to electric vehicles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203387175U true CN203387175U (en) | 2014-01-08 |
Family
ID=49875624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320460266.5U Expired - Lifetime CN203387175U (en) | 2013-07-31 | 2013-07-31 | Battery management system voltage surge protection circuit applicable to electric vehicles |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203387175U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346550A (en) * | 2013-07-31 | 2013-10-09 | 哈尔滨威星动力电源科技开发有限责任公司 | Voltage surge protection circuit of battery management system suitable for electric car |
| CN104466939A (en) * | 2014-12-18 | 2015-03-25 | 上海康耐司信号设备有限公司 | Protective circuit for non-centralized load releasing 5A pulse testing |
| GB2558010A (en) * | 2016-12-16 | 2018-07-04 | Mahindra Electric Mobility Ltd | Method and device for surge protection of electric vehicle during charging |
-
2013
- 2013-07-31 CN CN201320460266.5U patent/CN203387175U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103346550A (en) * | 2013-07-31 | 2013-10-09 | 哈尔滨威星动力电源科技开发有限责任公司 | Voltage surge protection circuit of battery management system suitable for electric car |
| CN104466939A (en) * | 2014-12-18 | 2015-03-25 | 上海康耐司信号设备有限公司 | Protective circuit for non-centralized load releasing 5A pulse testing |
| GB2558010A (en) * | 2016-12-16 | 2018-07-04 | Mahindra Electric Mobility Ltd | Method and device for surge protection of electric vehicle during charging |
| GB2558010B (en) * | 2016-12-16 | 2020-08-26 | Mahindra Electric Mobility Ltd | Method and device for surge protection of electric vehicle during charging |
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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: 20140108 |
|
| CX01 | Expiry of patent term |