CN206575157U - A kind of battery power feeds electric voltage reverse-connection protection circuit - Google Patents
A kind of battery power feeds electric voltage reverse-connection protection circuit Download PDFInfo
- Publication number
- CN206575157U CN206575157U CN201621233893.5U CN201621233893U CN206575157U CN 206575157 U CN206575157 U CN 206575157U CN 201621233893 U CN201621233893 U CN 201621233893U CN 206575157 U CN206575157 U CN 206575157U
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- circuit
- battery power
- protection circuit
- power feeds
- connection
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Abstract
The utility model discloses a kind of battery power feeds electric voltage reverse-connection protection circuit; including battery power feeds, external load circuit; it also includes comparison circuit, first switch protection circuit and relay, and the output end of the battery power feeds is connected by relay with the input of the external load circuit；The input of the comparison circuit is connected with the output end of the battery power feeds, and its output end is connected with the input of the first switch protection circuit, and the output end of the first switch protection circuit is connected with the input of the relay；The comparison circuit is used to detect that the polarity and output control signal of battery power feeds to give first switch protection circuit, when incorrect polarity, the connection of first switch protection circuit control relay cut-out battery power feeds and external load circuit.Reverse connecting protection is realized using pure hardware, compared to software detection action, faster, security is higher for response speed.The utility model is widely used in power technique fields as a kind of battery power feeds electric voltage reverse-connection circuit.
Description
Technical field
The utility model is related to power technique fields, more particularly to a kind of battery power feeds electric voltage reverse-connection protection circuit.
Background technology
Current new energy industry flourishes, wherein, energy-storage system is exactly to store sustainable and can be again by lithium battery
Raw electric energy.Busbar voltage height, energy are extremely big after lithium battery Pack series connection in system.Prevent BMS parts high based on this situation
The positive and negative reversal connection of pressure side and to take corresponding protection circuit be reasonably necessary, the existing Preservation tactics of in the market are all to rely on software detection
Action protection.
1. judging by software detection, superior BMS sends instruction, then closes contactor by higher level's control and disconnect outside
Load circuit, the speed that it is acted is slow, reduces security.
2. protect its poor reliability by software detection, probably due to software failure either Communication and can not protect
Shield.
Utility model content
In order to solve the above-mentioned technical problem, the purpose of this utility model be to provide a kind of fast response time, it is safe
Battery power feeds electric voltage reverse-connection protection circuit.
The technical scheme that the utility model is used is：A kind of battery power feeds electric voltage reverse-connection protection circuit, including battery are female
Line, external load circuit, it also includes comparison circuit, first switch protection circuit and relay, the output of the battery power feeds
End is connected by relay with the input of the external load circuit；The input of the comparison circuit and the battery power feeds
Output end connection, its output end is connected with the input of the first switch protection circuit, the first switch protection circuit
Output end be connected with the input of the relay；The comparison circuit is used for the polarity and output control for detecting battery power feeds
Signal gives first switch protection circuit, when incorrect polarity, first switch protection circuit control relay cut-out battery power feeds with
The connection of external load circuit.
Further, the comparison circuit includes the first divider resistance, operational amplifier and reference voltage circuit, the electricity
Pond bus is connected by the first divider resistance with the positive input terminal of the operational amplifier, the output end and fortune of the reference voltage
The negative input end connection of amplifier is calculated, the output end of the operational amplifier is connected with the first switch protection circuit.
Further, the reference voltage circuit includes the first power supply and the first current-limiting resistance, and first power supply passes through the
The negative input end connection of one current-limiting resistance and operational amplifier.
Further, first switch protection circuit includes the first triode and the second current-limiting resistance, the operational amplifier
Output end is connected by the second current-limiting resistance with the base stage of the first triode, and the emitter stage of first triode is connected to ground,
Its colelctor electrode is connected with the input of the relay.
It is additionally based on another technical scheme of utility model basic conception, a kind of battery power feeds electric voltage reverse-connection protection electricity
Road, including battery, external load circuit, it is characterised in that：Its also include comparison circuit, first switch protection circuit, relay,
Level shifting circuit, MCU and second switch protection circuit, the battery power feeds pass through relay and the external load circuit
Input connection；The output end of the battery power feeds is connected with comparison circuit, level shifting circuit and MCU in turn, described
MCU output end is connected with the second switch protection circuit；The output end of the comparison circuit is connected with first switch in turn
Protection circuit, second switch protection circuit, the output end of second switch circuit are connected with the external load circuit input；Institute
Stating comparison circuit is used to detect that the polarity and output control signal of battery power feeds to give first switch protection circuit, works as incorrect polarity
When, the connection of first switch protection circuit control relay cut-out battery power feeds and external load circuit.
Further, the comparison circuit includes the first divider resistance, operational amplifier and reference voltage circuit, the electricity
Pond bus is connected by the first divider resistance with the positive input terminal of the operational amplifier, the output end and fortune of the reference voltage
The negative input end connection of amplifier is calculated, the output end of the operational amplifier is connected with the first switch protection circuit.
Further, the reference voltage circuit includes the first power supply and the first current-limiting resistance, and first power supply passes through the
The negative input end connection of one current-limiting resistance and operational amplifier.
Further, the level shifting circuit includes the second triode, the 3rd current-limiting resistance, the 4th current-limiting resistance and the
Two power ends, the emitter stage of the second triode be connected to ground, its colelctor electrode passes through the 3rd current-limiting resistance and connected with second source end
Connect, its base stage is connected by the 4th current-limiting resistance with the output end of the operational amplifier, the colelctor electrode of second triode
It is connected with the input of the second switch circuit.
Further, the second switch circuit includes：3rd triode and the 4th current-limiting resistance, the 3rd triode
Colelctor electrode is connected by the 4th current-limiting resistance with the base stage of the 3rd triode, the emitter stage and first switch of the 3rd triode
The output end connection of circuit, its colelctor electrode is connected with the input of the relay.
Further, the second source is 3.3V.
The beneficial effects of the utility model are：The utility model be provided with comparison circuit, first switch protection circuit and after
Electrical equipment, the polarity and output control signal for detecting battery power feeds using comparison circuit gives first switch protection circuit, when polarity is wrong
Mistake, the connection of first switch protection circuit control relay cut-out battery power feeds and external load circuit is real using pure hardware
Existing reverse connecting protection, compared to software detection action, faster, security is higher for response speed.
Be additionally based on another technical scheme of the utility model basic conception, by increase level shifting circuit, MCU, with
And second switch protection circuit, increase a set of software protection loop on the basis of hardware protection, further increase battery female
The security reliability of line reverse connecting protection.
Brief description of the drawings
Embodiment of the present utility model is described further below in conjunction with the accompanying drawings：
Fig. 1 is the electrical block diagram of the utility model embodiment one；
Fig. 2 is the circuit theory diagrams of the comparison circuit in the utility model embodiment one；
Fig. 3 is the circuit theory diagrams of the first switch protection circuit in the utility model embodiment one；
Fig. 4 is the electrical block diagram of the utility model embodiment two；
Fig. 5 is the circuit theory diagrams of the comparison circuit in the utility model embodiment two；
Fig. 6 is the circuit theory diagrams of the level shifting circuit in the utility model embodiment two；
Fig. 7 is the circuit theory diagrams of the second switch protection circuit in the utility model embodiment two.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.
Embodiment 1
As shown in figure 1, a kind of battery power feeds electric voltage reverse-connection protection circuit, including battery power feeds, external load circuit, it is also
Including comparison circuit, first switch protection circuit and relay, the output ends of the battery power feeds by relay with it is described outer
The input connection of section load circuit；The input of the comparison circuit is connected with the output end of the battery power feeds, and it is exported
End is connected with the input of the first switch protection circuit, output end and the relay of the first switch protection circuit
Input connection；The comparison circuit is used to detect that the polarity and output control signal of battery power feeds to protect electricity to first switch
Road, when incorrect polarity, the connection of first switch protection circuit control relay cut-out battery power feeds and external load circuit.
As shown in Fig. 2 the comparison circuit includes the first divider resistance, operational amplifier UK1A and reference voltage electricity
Road, the battery power feeds BUS+ is connected by the first divider resistance with the positive input terminal of the operational amplifier UK1A, the base
The output end of quasi- voltage is connected with operational amplifier UK1A negative input end, the output end of the operational amplifier UK1A with it is described
First switch protection circuit is connected.The reference voltage circuit includes the first power supply -12V and the first current-limiting resistance R89, and described the
One power supply -12V is connected by the first current-limiting resistance R89 with operational amplifier UK1A negative input end.
As shown in figure 3, first switch protection circuit includes the first triode QK4 and the second current-limiting resistance R165, the fortune
The output end for calculating amplifier UK1A is connected by the second current-limiting resistance R165 with the first triode UK1A base stage, and described first
Triode QK4 emitter stage is connected to ground, and its colelctor electrode is connected with the input of the relay RL1.Wherein by some electricity
Sampled signal UR1 is obtained after resistance partial pressure, output logic is compared with the UR95 in reference voltage circuit by operational amplifier UK1A
Level IN-ERROR.
1. when bus BUS+ just connects, voltage is 1000V, then is obtained by Ohm's law：
UR1=[150K/ (3M+3M+3M+3M+3M+150K)] * 1000V=9.9V
UR95=[1K/ (1K+20K)] * -12V=-0.57V
UR1>UR95, so comparator output high level IN-ERROR=+12V.
2. when bus BUS+ reversal connections, voltage is -1000V, then is obtained by Ohm's law：
UR1=[150K/ (3M+3M+3M+3M+3M+150K)] * -1000V=-9.9V
UR95=[1K/ (1K+20K)] * -12V=-0.57V
UR1<UR95, so comparator output low level IN-ERROR=-12V.
IN-ERROR is bus BUS+ positive-negative connected testing result signals, is given to the first triode QK4, utilizes opening for triode
Principle is closed, when bus BUS+ reversal connections, the first triode QK4 disconnects, and the state of dead electricity is motionless at relay RL1 control coils
Make, contact COM and NO is normally open, so the main contactor in external load circuit is also off-state, so as to effectively protect
Lithium battery Pack is protected, not because bus BUS+ reversal connections cause to damage the catastrophic accident of the generation such as device, short-circuit fire.
Reverse connecting protection is realized using pure hardware, compared to software detection action, faster, security is higher for response speed.
Embodiment 2
As shown in figure 4, a kind of battery power feeds electric voltage reverse-connection protection circuit, including battery, external load circuit, it also includes
Comparison circuit, first switch protection circuit, relay, level shifting circuit, MCU and second switch protection circuit, the electricity
Pond bus is connected by relay with the input of the external load circuit；The output end of the battery power feeds is connected with turn
Comparison circuit, level shifting circuit and MCU, the output end of the MCU are connected with the second switch protection circuit；The ratio
Output end compared with circuit is connected with first switch protection circuit, second switch protection circuit, the output of second switch circuit in turn
End is connected with the external load circuit input；The comparison circuit is used for the polarity for detecting battery power feeds and output control letter
Number give first switch protection circuit, when incorrect polarity, first switch protection circuit control relay cut-out battery power feeds with it is outer
The connection of section load circuit.
As shown in figure 5, the comparison circuit includes the first divider resistance, operational amplifier UK1A and reference voltage electricity
Road, the battery power feeds BUS+ is connected by the first divider resistance with the positive input terminal of the operational amplifier UK1A, the base
The output end of quasi- voltage is connected with operational amplifier UK1A negative input end, the output end of the operational amplifier UK1A with it is described
First switch protection circuit is connected.The reference voltage circuit includes the first power supply -12V and the first current-limiting resistance R89, and described the
One power supply -12V is connected by the first current-limiting resistance R89 with operational amplifier UK1A negative input end.First switch protection circuit
Output end including the first triode QK4 and the second current-limiting resistance R165, the operational amplifier UK1A passes through the second current limliting electricity
Resistance R165 is connected with the first triode UK1A base stage, and the emitter stage of the first triode QK4 is connected to ground, its colelctor electrode
It is connected with the input of the relay RL1.Sampled signal UR1 is wherein obtained after some electric resistance partial pressures, is put by computing
Big device UK1A is compared output logic level IN-ERROR with reference voltage circuit.
As shown in fig. 6, the level shifting circuit includes the second triode Q2, the 3rd current-limiting resistance R104, the 4th current limliting
Resistance and second source end 3.3V, the second triode Q2 emitter stage be connected to ground, its colelctor electrode passes through the 3rd current limliting electricity
Resistance R104 is connected with second source end 3.3V, and its base stage passes through the 4th current-limiting resistance R105's and operational amplifier UK1A
Output end is connected, and the colelctor electrode of the second triode Q2 is connected with the input of the second switch circuit.
As shown in fig. 7, the second switch circuit includes：3rd triode QKA4 and the 4th current-limiting resistance R164, it is described
3rd triode QKA4 colelctor electrode is connected by the 4th current-limiting resistance R164 with the 3rd triode QKA4 base stage, and described
Three triode QKA4 emitter stage is connected with the output end of first switch circuit, its colelctor electrode and the input of the relay RL1
End connection.
As described in Example 1, comparison circuit is detected as bus BUS+ positive-negative connected testing result signal IN-ERROR, output
It is bus BUS+ positive-negative connected testing result signals to IN-ERROR, is given to the first triode QK4, it is former using the switch of triode
Reason, when bus BUS+ reversal connections, the first triode QK4 is disconnected, and the state of dead electricity is failure to actuate at relay RL1 control coils, is touched
Point COM and NO is normally open, so the main contactor in external load circuit is also off-state, synchronous signal IN-ERROR
After level shifting circuit, it is converted into 3.3V signals and is given to MCU, be used as fault alarm signal.$ IN-ERROR are when normal
Low level 0V, $ IN-ERROR are high level 3.3V during failure reversal connection.$ DO1 are the signal that MCU softwares control DO loops, and MCU leads to
Control triode QKA4 shut-offs, control relay RL1 allows the connection of battery power feeds BUS+ and external load circuit,
By increasing level shifting circuit, MCU and second switch protection circuit, increase on the basis of hardware protection
A set of software protection loop, further increases the security reliability of battery power feeds reverse connecting protection.
Above is preferable implementation of the present utility model is illustrated, but the utility model is created and is not limited to institute
State embodiment, those skilled in the art can also make a variety of etc. on the premise of without prejudice to the utility model spirit
With deformation or replacement, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (10)
1. a kind of battery power feeds electric voltage reverse-connection protection circuit, including battery power feeds, external load circuit, it is characterised in that：It is also
Including comparison circuit, first switch protection circuit and relay, the output ends of the battery power feeds by relay with it is described outer
The input connection of section load circuit；
The input of the comparison circuit is connected with the output end of the battery power feeds, and its output end is protected with the first switch
The input connection of circuit, the output end of the first switch protection circuit is connected with the input of the relay；
The comparison circuit is used to detect that the polarity and output control signal of battery power feeds to give first switch protection circuit, works as polarity
During mistake, the connection of first switch protection circuit control relay cut-out battery power feeds and external load circuit.
2. battery power feeds electric voltage reverse-connection protection circuit according to claim 1, it is characterised in that：The comparison circuit includes
First divider resistance, operational amplifier and reference voltage circuit, the battery power feeds pass through the first divider resistance and the fortune
The positive input terminal connection of amplifier is calculated, the output end of the reference voltage and the negative input end of operational amplifier are connected, the fortune
The output end for calculating amplifier is connected with the first switch protection circuit.
3. battery power feeds electric voltage reverse-connection protection circuit according to claim 2, it is characterised in that：The reference voltage circuit
Including the first power supply and the first current-limiting resistance, first power supply passes through the first current-limiting resistance and the negative input end of operational amplifier
Connection.
4. battery power feeds electric voltage reverse-connection protection circuit according to claim 2, it is characterised in that：First switch protection circuit
Including the first triode and the second current-limiting resistance, the output end of the operational amplifier passes through the second current-limiting resistance and the one or three pole
The base stage connection of pipe, the emitter stage of first triode is connected to ground, and its colelctor electrode is connected with the input of the relay.
5. a kind of battery power feeds electric voltage reverse-connection protection circuit, including battery, external load circuit, it is characterised in that：It also includes
Comparison circuit, first switch protection circuit, relay, level shifting circuit, MCU and second switch protection circuit, the electricity
Pond bus is connected by relay with the input of the external load circuit；
The output end of the battery power feeds is connected with comparison circuit, level shifting circuit and MCU, the output of the MCU in turn
End is connected with the second switch protection circuit；
The output end of the comparison circuit is connected with first switch protection circuit, second switch protection circuit, second switch in turn
The output end of circuit is connected with the external load circuit input；
The comparison circuit is used to detect that the polarity and output control signal of battery power feeds to give first switch protection circuit, works as polarity
During mistake, the connection of first switch protection circuit control relay cut-out battery power feeds and external load circuit.
6. battery power feeds electric voltage reverse-connection protection circuit according to claim 5, it is characterised in that：The comparison circuit includes
First divider resistance, operational amplifier and reference voltage circuit, the battery power feeds pass through the first divider resistance and the fortune
The positive input terminal connection of amplifier is calculated, the output end of the reference voltage and the negative input end of operational amplifier are connected, the fortune
The output end for calculating amplifier is connected with the first switch protection circuit.
7. battery power feeds electric voltage reverse-connection protection circuit according to claim 6, it is characterised in that：The reference voltage circuit
Including the first power supply and the first current-limiting resistance, first power supply passes through the first current-limiting resistance and the negative input end of operational amplifier
Connection.
8. battery power feeds electric voltage reverse-connection protection circuit according to claim 6, it is characterised in that：The level shifting circuit
Including the second triode, the 3rd current-limiting resistance, the 4th current-limiting resistance and second source end, the emitter stage of the second triode with
Ground is connected, and its colelctor electrode is connected by the 3rd current-limiting resistance with second source end, its base stage by the 4th current-limiting resistance with it is described
The output end connection of operational amplifier, the colelctor electrode of second triode is connected with the input of the second switch circuit.
9. battery power feeds electric voltage reverse-connection protection circuit according to claim 8, it is characterised in that：The second switch circuit
Including：3rd triode and the 4th current-limiting resistance, the colelctor electrode of the 3rd triode pass through the 4th current-limiting resistance and the three or three
The base stage connection of pole pipe, the emitter stage of the 3rd triode is connected with the output end of first switch circuit, its colelctor electrode and institute
State the input connection of relay.
10. battery power feeds electric voltage reverse-connection protection circuit according to claim 8, it is characterised in that：The second source is
3.3V。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621233893.5U CN206575157U (en) | 2016-11-17 | 2016-11-17 | A kind of battery power feeds electric voltage reverse-connection protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621233893.5U CN206575157U (en) | 2016-11-17 | 2016-11-17 | A kind of battery power feeds electric voltage reverse-connection protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206575157U true CN206575157U (en) | 2017-10-20 |
Family
ID=60063360
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621233893.5U Withdrawn - After Issue CN206575157U (en) | 2016-11-17 | 2016-11-17 | A kind of battery power feeds electric voltage reverse-connection protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206575157U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655145A (en) * | 2016-11-17 | 2017-05-10 | 深圳市科陆电子科技股份有限公司 | Battery bus voltage reverse connection protection circuit |
-
2016
- 2016-11-17 CN CN201621233893.5U patent/CN206575157U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655145A (en) * | 2016-11-17 | 2017-05-10 | 深圳市科陆电子科技股份有限公司 | Battery bus voltage reverse connection protection circuit |
| CN106655145B (en) * | 2016-11-17 | 2018-12-07 | 深圳市科陆电子科技股份有限公司 | A kind of battery power feeds electric voltage reverse-connection protection circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20171020 Effective date of abandoning: 20181207 |