CN206293933U - Battery discharge overvoltage crowbar - Google Patents
Battery discharge overvoltage crowbar Download PDFInfo
- Publication number
- CN206293933U CN206293933U CN201621461160.7U CN201621461160U CN206293933U CN 206293933 U CN206293933 U CN 206293933U CN 201621461160 U CN201621461160 U CN 201621461160U CN 206293933 U CN206293933 U CN 206293933U
- Authority
- CN
- China
- Prior art keywords
- gate
- controlled switch
- voltage
- regulator diode
- overvoltage crowbar
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of battery discharge overvoltage crowbar, interrupted for the switching tube in causing DC/DC circuits under battery overvoltage condition, battery discharge overvoltage crowbar includes：The PWM control modules of voltage-regulator diode, gate-controlled switch, and the switching tube interruption in trigger signal control DC/DC circuits；Wherein, gate-controlled switch includes control end, the first connection end and the second connection end that can be connected or disconnect with the first connection end；The negative electrode of voltage-regulator diode is electrically connected with the cathode output end of battery, the anode of voltage-regulator diode is connected with the control end of gate-controlled switch, the first connection end ground connection of gate-controlled switch, second connection end of gate-controlled switch is connected with the trigger signal input of PWM control modules, and the control signal output of PWM control modules is connected with the switching tube interrupt signal input of DC/DC circuits.
Description
Technical field
The utility model is related to battery protecting circuit technical field, more particularly to a kind of battery discharge overvoltage crowbar.
Background technology
In battery discharging circuit, during in order to avoid battery discharge, the voltage of battery is excessive and causes circuit to damage.Typically
Ground, needs to increase overvoltage crowbar in circuit.When the electric voltage over press of battery output, cut-off loop, with protection circuit
Component is not damaged by.In the prior art, the peripheral components that of this sort battery discharge overvoltage crowbar is related to are more multiple
It is miscellaneous, so that the cost of equipment is accordingly improved.
Utility model content
The main purpose of the utility model is：There is provided one kind can simplify overvoltage crowbar, reduce peripheral components
Set, so as to reduce the battery discharge overvoltage crowbar of the cost of equipment.
To achieve the above object, the utility model provides a kind of battery discharge overvoltage crowbar, battery discharge overvoltage
Protection circuit is used to be caused under battery overvoltage condition the switching tube interruption in DC/DC circuits, battery discharge overvoltage crowbar
Including：The PWM of voltage-regulator diode, gate-controlled switch, and the switching tube interruption in the trigger signal control DC/DC circuits
Control module；Wherein, the gate-controlled switch includes control end, the first connection end and can be connected or disconnect with the first connection end the
Two connection ends；The negative electrode of the voltage-regulator diode is electrically connected with the cathode output end of the battery, the sun of the voltage-regulator diode
Pole is connected with the control end of the gate-controlled switch, the first connection end ground connection of the gate-controlled switch, the second of the gate-controlled switch
Connection end is connected with the trigger signal input of the PWM control modules, the control signal output of the PWM control modules with
The switching tube interrupt signal input connection of the DC/DC circuits.
Preferably, the gate-controlled switch is NPN triode, the base stage of the NPN triode and the voltage-regulator diode
Anode is electrically connected, and grounded emitter, colelctor electrode is connected with the trigger signal input of the PWM control modules.
Preferably, battery discharge overvoltage crowbar also include the first current-limiting resistance, first current-limiting resistance with it is described
Voltage-regulator diode is connected.
Preferably, battery discharge overvoltage crowbar also includes the second current-limiting resistance, and the control end of the gate-controlled switch is passed through
Second current-limiting resistance enables signal output part and is connected with outside.
The battery discharge overvoltage crowbar that the utility model is provided, the circuit increases voltage stabilizing two by battery output
Pole pipe.The rated voltage of voltage-regulator diode is slightly above the safe voltage of battery output.When the voltage of battery output is higher than default
Safe pole when, voltage-regulator diode punctures, so cause gate-controlled switch closure, PWM control modules output control signal control DC/
The switching tube of DC circuits disconnects, to avoid the device of excessive pressure damages circuit.Overvoltage crowbar of the present utility model is not influenceing
On the premise of overvoltage protection, the peripheral components of overvoltage crowbar are simplified, so as to reduce the hardware cost of equipment.
Brief description of the drawings
Fig. 1 is the circuit diagram of the utility model battery discharge overvoltage crowbar.
The realization of the utility model purpose, functional characteristics and advantage will be described further referring to the drawings in conjunction with the embodiments.
Specific embodiment
It should be appreciated that specific embodiment described herein is only used to explain the utility model, it is not used to limit this
Utility model.
The utility model provides a kind of battery discharge overvoltage crowbar.
With reference to Fig. 1, Fig. 1 is the circuit diagram of the utility model battery discharge overvoltage crowbar.The one of the present embodiment offer
Plant battery discharge overvoltage crowbar.Battery discharge overvoltage crowbar is used to cause DC/DC circuits 1 under battery overvoltage condition
In switching tube interrupt.Battery BAT electric discharge overvoltage crowbars include：Voltage-regulator diode D, gate-controlled switch Q, and according to triggering
The PWM control modules 2 that switching tube in signal control DC/DC circuits 1 is interrupted.Wherein, gate-controlled switch Q includes control end, first
Connection end and the second connection end that can be connected or disconnect with the first connection end.The negative electrode of voltage-regulator diode D and the positive pole of battery BAT
Output end is electrically connected, and the anode of voltage-regulator diode D is connected with the control end of gate-controlled switch Q, the first connection termination of gate-controlled switch Q
Ground, second connection end of gate-controlled switch Q is connected with the trigger signal input of PWM control modules 2, the control of PWM control modules 2
Signal output part is connected with the switching tube interrupt signal input of DC/DC circuits 1.
When DC/DC circuits 1 receive the trigger signal of the output of PWM control modules 2, the then interrupt switch pipe of DC/DC circuits 1,
With deenergization current supply circuit.In the present embodiment, in order to protection circuit is not by excessive pressure damages, when battery BAT discharge voltages are super
When crossing pre-set value, the interrupt switch pipe of DC/DC circuits 1.
The anode of voltage-regulator diode D is connected with the positive output end of battery BAT.Usually, the rated voltage of voltage-regulator diode D
The slightly above output voltage of battery BAT.Such as：Battery BAT output voltages are+12V, then the rated voltage of voltage-regulator diode D is then selected
With+15V.
Gate-controlled switch Q includes control end, the first connection end and the second connection end.When gate-controlled switch Q the first connection end and
The conducting state of the second connection end depends on the voltage (level) of control end.In this embodiment, gate-controlled switch Q is NPN triode.
The base stage of NPN triode is control end, transmitting extremely first connection end of NPN triode, the current collection extremely second of NPN triode
Connection end.The base stage of NPN triode is electrically connected with the anode of voltage-regulator diode D, grounded emitter, and colelctor electrode controls mould with PWM
The trigger signal input connection of block 2.
Operation principle：When the voltage of battery BAT outputs is more than default safety value, voltage-regulator diode D punctures.NPN tri-
Pressure difference between the base stage and emitter stage of pole pipe is more than 0.7V.Now, the emitter and collector conducting of NPN triode.PWM is controlled
The trigger signal input of molding block 2 is pulled low.PWM control modules 2 receive low level trigger signal, then in its control signal
Output end outputs control signals to DC/DC circuits 1, the then interrupt switch pipe of DC/DC circuits 1, to avoid overvoltage from making circuit devcie
Into infringement.
Further, battery BAT electric discharges overvoltage crowbar also includes the first current-limiting resistance R1.First current-limiting resistance R1 with
Voltage-regulator diode D is connected, and after avoiding voltage-regulator diode D from puncturing, high current is impacted to NPN triode and caused to damage
Evil.It should be noted that the position of both voltage-regulator diode D and the first current-limiting resistance R1 can mutually switch, as long as both strings
It is associated on a circuit.
Further, battery BAT electric discharges overvoltage crowbar also includes the second current-limiting resistance R2.In order to improve DC/DC
The interruption operability of circuit 1, in the present embodiment, the control end of gate-controlled switch Q is enabled through the second current-limiting resistance R2 with outside
Signal output part is connected.Staff can enable signal output part and export high level to gate-controlled switch Q pipes by outside, to control
The switching tube of DC/DC circuits 1 processed disconnects.Similarly, signal output part can be enabled by outside and exports low level to gate-controlled switch Q
Pipe, is closed with the switching tube for controlling DC/DC circuits 1.
The battery BAT electric discharge overvoltage crowbars that the utility model is provided, the circuit increases by battery BAT output ends
Voltage-regulator diode D.The rated voltage of voltage-regulator diode D is slightly above the safe voltage of battery BAT output ends.When battery BAT outputs
Voltage when being higher than default safe pole, voltage-regulator diode D punctures, and then causes gate-controlled switch Q closures, and PWM control modules 2 are defeated
The switching tube for going out control signal control DC/DC circuits 1 disconnects, to avoid the device of excessive pressure damages circuit.Mistake of the present utility model
Voltage protection circuit simplifies the peripheral components of overvoltage crowbar on the premise of overvoltage protection is not influenceed, and is set so as to reduce
Standby hardware cost.
Preferred embodiment of the present utility model is these are only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using the utility model specification and accompanying drawing content, or be directly or indirectly used in
Other related technical fields, are similarly included in scope of patent protection of the present utility model.
Claims (4)
1. a kind of battery discharge overvoltage crowbar, for causing DC/DC circuits under battery overvoltage condition in switching tube in
It is disconnected, it is characterised in that battery discharge overvoltage crowbar includes：Voltage-regulator diode, gate-controlled switch, and according to trigger signal control
Make the PWM control modules that the switching tube in the DC/DC circuits is interrupted；Wherein, the gate-controlled switch includes that control end, first connect
Connect end and the second connection end that can be connected or disconnect with the first connection end；The negative electrode of the voltage-regulator diode is with the battery just
Pole output end electrical connection, the anode of the voltage-regulator diode is connected with the control end of the gate-controlled switch, the gate-controlled switch
First connection end is grounded, and the second connection end of the gate-controlled switch is connected with the trigger signal input of the PWM control modules,
The control signal output of the PWM control modules is connected with the switching tube interrupt signal input of the DC/DC circuits.
2. battery discharge overvoltage crowbar as claimed in claim 1, it is characterised in that the gate-controlled switch is the poles of NPN tri-
Pipe, the base stage of the NPN triode electrically connects with the anode of the voltage-regulator diode, grounded emitter, colelctor electrode and the PWM
The trigger signal input connection of control module.
3. battery discharge overvoltage crowbar as claimed in claim 1 or 2, it is characterised in that also including the first current-limiting resistance,
First current-limiting resistance is connected with the voltage-regulator diode.
4. battery discharge overvoltage crowbar as claimed in claim 1 or 2, it is characterised in that also including the second current-limiting resistance,
The control end of the gate-controlled switch enables signal output part and is connected through second current-limiting resistance and outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621461160.7U CN206293933U (en) | 2016-12-29 | 2016-12-29 | Battery discharge overvoltage crowbar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621461160.7U CN206293933U (en) | 2016-12-29 | 2016-12-29 | Battery discharge overvoltage crowbar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206293933U true CN206293933U (en) | 2017-06-30 |
Family
ID=59155096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621461160.7U Expired - Fee Related CN206293933U (en) | 2016-12-29 | 2016-12-29 | Battery discharge overvoltage crowbar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206293933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474300A (en) * | 2019-07-30 | 2019-11-19 | 安徽誉昕能源科技有限公司 | A kind of battery of electric vehicle overvoltage protective system |
-
2016
- 2016-12-29 CN CN201621461160.7U patent/CN206293933U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110474300A (en) * | 2019-07-30 | 2019-11-19 | 安徽誉昕能源科技有限公司 | A kind of battery of electric vehicle overvoltage protective system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Battery discharge overvoltage crowbar Effective date of registration: 20191128 Granted publication date: 20170630 Pledgee: Shenzhen hi tech investment small loan Co., Ltd Pledgor: Shenzhen city fine Dresdner Electronics Co. Ltd. Registration number: Y2019440020019 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170630 Termination date: 20201229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |