CN206306853U - Electric automobile and its precharge control circuit - Google Patents
Electric automobile and its precharge control circuit Download PDFInfo
- Publication number
- CN206306853U CN206306853U CN201621183982.3U CN201621183982U CN206306853U CN 206306853 U CN206306853 U CN 206306853U CN 201621183982 U CN201621183982 U CN 201621183982U CN 206306853 U CN206306853 U CN 206306853U
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- China
- Prior art keywords
- module
- relay
- battery pack
- control circuit
- time delay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
A kind of precharge control circuit includes high pressure detection module, pre-charge module, time delay module, control module and relay module.The pre-charge module and the relay module are connected in parallel between battery pack and electrical equipment.When the high pressure detection module detects the high-voltage signal of the battery pack, the battery pack charges to the pre-charge module, and the high pressure detection module exports testing result to the control module after the time delay module time delay.After the control module receives the testing result, the relay module is controlled to close, when the relay module is closed, the charging voltage of the pre-charge module is more than or equal to reference value, and the battery pack is powered by the relay module to the electrical equipment.Above-mentioned precharge control circuit is avoided that relay is damaged in closure moment because of overcurrent.The utility model also provides a kind of electric automobile of the application precharge control circuit.
Description
【Technical field】
The utility model is related to electric vehicle engineering field, more particularly to a kind of electric automobile and its preliminary filling electric control electricity
Road.
【Background technology】
At present, the high-tension electricity accessory power supply circuit of electric automobile is typically using insurance plus relay construction.In this structure
In, exist moment connect high pressure situation, due to moment connect high pressure when electric current it is excessive, so as to cause the bonding of relay or
Damage, and then reduce the reliability of product.
In consideration of it, real be necessary to provide a kind of electric automobile and its precharge control circuit to overcome disadvantages described above.
【The content of the invention】
The purpose of this utility model is to provide and a kind of is avoided that relay in the closure preliminary filling that is damaged by overcurrent of moment
Electric control circuit.
The purpose of this utility model is also to provide a kind of electric automobile of the application precharge control circuit.
To achieve these goals, the utility model provides a kind of precharge control circuit, the precharge control circuit
Including high pressure detection module, pre-charge module, time delay module, control module and relay module, the high pressure detection module with
Battery pack and the time delay module are connected, and the control module is connected with the time delay module and the relay module, described
Pre-charge module and the relay module are connected in parallel between the battery pack and electrical equipment, when high pressure detection module inspection
When measuring the high-voltage signal of the battery pack, the battery pack charges to the pre-charge module, and the high pressure detection module will
Testing result is exported to the control module after the time delay module time delay, and the control module receives the testing result
Afterwards, control relay module closure, when the relay module is closed, the charging voltage of the pre-charge module be more than or
Equal to reference value, the battery pack is powered by the relay module to the electrical equipment.
Further, the high pressure detection module includes first resistor and second resistance, the first end of the first resistor
It is connected with the battery pack, the second end of the first resistor is connected with the time delay module, and is connect by the second resistance
Ground.
Further, the pre-charge module include 3rd resistor and the first electric capacity, the first end of the 3rd resistor with
The battery pack is connected, and the second end of the 3rd resistor is connected with the electrical equipment and the relay module, and passes through
First capacity earth.
Further, voltage Uc (the t)=Vb* (1-exp (- t/r3*c1)) of first electric capacity, wherein, Vb represents institute
The voltage of battery pack output is stated, exp () represents the exponential function with e as bottom, and t represents precharge time, and r3 represents the described 3rd
The resistance of resistance, c1 represents the capacitance of first electric capacity, and voltage Uc (t) of first electric capacity is the pre-charge module
Charging voltage.
Further, the time delay module includes the second electric capacity and the 4th resistance, the first end of second electric capacity and institute
State high pressure detection module to be connected, the second end of second electric capacity is connected with the control module, and by the 4th resistance
Ground connection, the time delay of the time delay module reaches the preliminary filling of the reference value more than or equal to the charging voltage of the pre-charge module
The electric time.
Further, the control module includes timer and electronic switch, and the timer includes triggering pin and defeated
Go out pin, the triggering pin is connected to receive the testing result, the output pin and the electricity with the time delay module
The first end of sub switch is connected, the second end ground connection of the electronic switch, the 3rd end and the relay of the electronic switch
Module is connected.
Further, the relay module includes relay, and the relay includes coil and switch, the coil
First end is connected with power supply, and the second end of the coil is connected with the 3rd end of the electronic switch, the first end of the switch
It is connected with the battery pack, the second end of the switch is connected with the electrical equipment and the pre-charge module.
Further, the relay module also includes diode, the anode of the diode and the second of the coil
End is connected, and the negative electrode of the diode is connected with the first end of the coil.
Further, the electronic switch is NMOS FETs, the first end of the electronic switch, the second end and the 3rd
End corresponds respectively to grid, drain electrode and the source electrode of the NMOS FETs.
To achieve these goals, the utility model also provides a kind of electric automobile, and the electric automobile includes as above institute
Precharge control circuit, battery pack and the electrical equipment stated, the battery pack give the use by the precharge control circuit
Electric equipment is powered.
Compared to prior art, the utility model postpones to be controlled described in the detection triggers by the time delay module
The time of module, so that the relay module is closed after the charging voltage of the pre-charge module reaches the reference value,
So as to reduce the voltage difference at the relay module two ends, so effectively prevent the relay module closure moment because
Overcurrent and damage, improve the reliability of the electric automobile.
【Brief description of the drawings】
The theory diagram of the electric automobile that Fig. 1 is provided for embodiment of the present utility model.
Fig. 2 is the circuit diagram of precharge control circuit in Fig. 1.
【Specific embodiment】
In order that the purpose of this utility model, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with
Accompanying drawing in the utility model embodiment, is clearly and completely described to the technical scheme in the utility model embodiment, shows
So, described embodiment is only a part of embodiment of the utility model, rather than whole embodiments.It is new based on this practicality
Embodiment in type, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of the utility model protection.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with technology of the present utility model is belonged to
The implication that the technical staff in domain is generally understood that is identical.It is herein to be in term used in the description of the present utility model
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
Refer to Fig. 1, the theory diagram of the electric automobile 10 that Fig. 1 is provided for embodiment of the present utility model.It is described electronic
Automobile 10 includes precharge control circuit 100, battery pack 200 and electrical equipment 300.The battery pack 200 passes through the preliminary filling
Electric control circuit 100 is powered to the electrical equipment 300.In the present embodiment, the electrical equipment 300 includes air-conditioning, oil
One or more in pump controller, air pump controller, direct current electric transducer (DC/DC Converter).
The precharge control circuit 100 includes high pressure detection module 110, pre-charge module 120, time delay module 130, control
Molding block 150 and relay module 160.The high pressure detection module 110 and the battery pack 200 and the time delay module 130
It is connected.The control module 150 is connected with the time delay module 130 and the relay module 160.The pre-charge module
120 and the relay module 160 be connected in parallel between the battery pack 200 and the electrical equipment 300.When high pressure detection
When module 110 detects the high-voltage signal of the battery pack 200,200 pairs of pre-charge modules 120 of the battery pack charge,
The high pressure detection module 110 exports testing result to the control module 150 after the time delay of the time delay module 130.Institute
State after control module 150 receives the testing result, control the relay module 160 to close, the relay module 160
During closure, the charging voltage of the pre-charge module 120 is more than or equal to reference value, and the battery pack 200 is by the relay
Device module 160 is powered to the electrical equipment 300.
Refer to Fig. 2, the circuit diagram of the precharge control circuit 100 that Fig. 2 is provided for embodiment of the present utility model.It is described
High pressure detection module 110 includes first resistor R1 and second resistance R2.The first end of the first resistor R1 and the battery pack
200 are connected, and second end of the first resistor R1 is connected with the time delay module 130, and are grounded by the second resistance R2.
The pre-charge module 120 includes 3rd resistor R3 and the first electric capacity C1.The first end of the 3rd resistor R3 with
The battery pack 200 is connected, the second end and the electrical equipment 300 and the relay module 160 of the 3rd resistor R3
It is connected, and is grounded by the first electric capacity C1.
The time delay module 130 includes the second electric capacity C2 and the 4th resistance R4.The first end of the second electric capacity C2 and institute
State high pressure detection module 110 to be connected, second end of the second electric capacity C2 is connected with the control module 150, and by described
4th resistance R4 is grounded.
The control module 150 includes timer U1 and electronic switch Q1.The timer U1 includes triggering pin TRIG
And output pin OUT, the triggering pin TRIG is connected with the time delay module 130 to receive the testing result, described defeated
Go out pin OUT to be connected with the first end of the electronic switch Q1.The second end ground connection of the electronic switch Q1, the electronic switch
3rd end of Q1 is connected with the relay module 160.
In the present embodiment, the timer U1 also includes reset pin RESET, power pins VCC and grounding pin
GND.The reset pin RESET and the power pins VCC are connected with power supply V1, the grounding pin GND ground connection.
The relay module 160 includes relay 166, and the relay 166 includes coil J1 and switch K1.The line
The first end for enclosing J1 is connected with the power supply V1, and second end of the coil J1 is connected with the 3rd end of the electronic switch Q1,
The first end of the switch K1 is connected with the battery pack 200, second end of the switch K1 and the electrical equipment 300 and institute
Pre-charge module 120 is stated to be connected.
The relay module 160 also includes diode D1, the anode of the diode D1 and the second of the coil J1
End is connected, and the negative electrode of the diode D1 is connected with the first end of the coil J1.In the present embodiment, the diode D1
Electric energy for consuming the coil J1 when the electronic switch Q1 ends.
In the present embodiment, the electronic switch Q1 is NMOS FETs, the first end of the electronic switch Q1, the
Two ends and the 3rd end correspond respectively to grid, drain electrode and the source electrode of the NMOS FETs.In other embodiments, institute
It can be other switches, such as NPN type triode and IGBT with similar functions to state electronic switch Q1.
The operation principle of the utility model electric automobile 10 and its precharge control circuit 100 will be illustrated below.
When the battery pack 200 exports high-tension electricity, the battery pack 200 gives described first by the 3rd resistor R3
Electric capacity C1 charges.Voltage Uc (the t)=Vb* (1-exp (- t/r3*c1)) of the first electric capacity C1, wherein, Vb represents the electricity
The voltage of the output of pond group 200, exp () represents the exponential function with e as bottom, and t represents precharge time, and r3 represents the described 3rd
The resistance of resistance R3, c1 represents the capacitance of the first electric capacity C1.Voltage Uc (t) of the first electric capacity C1 is the precharge
The charging voltage of module 120.Flow through electric current i (t)=(Vb-Uc (t))/r3 of the 3rd resistor R3.
The first resistor R1 and the second resistance R2 carry out partial pressure to the high-tension electricity that the battery pack 200 is exported, and
The voltage that the second resistance R2 divides is exported to the time delay module as the testing result of the high pressure detection module 110
130.By the testing result time delay T=1.1*c2*r4, (wherein, c2 represents the second electric capacity C2's to the time delay module 130
Capacitance, r4 represents the resistance of the 4th resistance R4) after, the testing result is exported to the triggering pin of the timer U1
TRIG, is started working with triggering the timer U1.
The output pin OUT output control signals of the timer U1 give the first end of the electronic switch Q1, so that institute
Electronic switch Q1 conductings are stated, there is electric current to flow through in the coil J1, switch K1 closure, the first end of the switch K1 and the
Voltage difference U k (t)=Vb-Uc (t) between two ends.It follows that voltage Uc (t) of the first electric capacity C1 is bigger, it is described to open
Voltage difference U k (t) closed between the first end of K1 and the second end is smaller, and the electric current for flowing through the switch K1 is smaller.In this embodiment party
In formula, when the electronic switch Q1 is turned on, the electric current satisfaction for flowing through the coil J1 drives the electric current of the switch K1 closures to want
Ask, i.e. the electronic switch Q1 can meet the current requirements for driving the relay 166.
In order to prevent the relay 166 from being damaged because of overcurrent in closure moment, need to be when the relay 166 be closed
The current control of the switch K1 will be flowed through in safe range, i.e., need to be when the relay 166 be closed by the switch K1
First end and the second end between voltage difference be reduced to certain scope, that is, the switch K1 need to be made in the precharge mould
The charging voltage of block 120 is just closed after reaching reference value.In the present embodiment, the time delay T of the time delay module 130 be more than or
Equal to the precharge time t that the charging voltage of the pre-charge module 120 reaches the reference value, therefore, as the switch K1
During closure, the charging voltage of the pre-charge module 120 is more than or equal to the reference value, and the electric current for flowing through the switch K1 exists
In safe range, damaged because of overcurrent in closure moment so as to effectively prevent the relay 166.
The utility model by the time delay module 130 postpone control module 150 described in the detection triggers when
Between, so that the relay module 160 is closed after the charging voltage of the pre-charge module 120 reaches the reference value, from
And the voltage difference at the two ends of the relay module 160 is reduced, and then the relay module 160 is effectively prevent in closure
Moment damages because of overcurrent, improves the reliability of the electric automobile 10.
The utility model is not restricted to described in description and embodiments, thus for familiar field personnel and
Speech is easily achieved additional advantage and modification, therefore in the universal limited without departing substantially from claim and equivalency range
In the case of spirit and scope, the utility model be not limited to specific details, representational equipment and shown here as with description
Examples shown.
Claims (9)
1. a kind of precharge control circuit, it is characterised in that：The precharge control circuit includes high pressure detection module, precharge
Module, time delay module, control module and relay module, the high pressure detection module and battery pack and the time delay module phase
Even, the control module is connected with the time delay module and the relay module, the pre-charge module and the relay
Wired in parallel between the battery pack and electrical equipment, when the high pressure detection module detect the battery pack high pressure letter
Number when, the battery pack charges to the pre-charge module, and the high pressure detection module is by testing result through the time delay module
Exported after time delay to the control module, after the control module receives the testing result, control the relay module
Closure, when the relay module is closed, the charging voltage of the pre-charge module is more than or equal to reference value, the battery pack
Powered to the electrical equipment by the relay module.
2. precharge control circuit as claimed in claim 1, it is characterised in that：The high pressure detection module includes first resistor
And second resistance, the first end of the first resistor is connected with the battery pack, and the second end of the first resistor is prolonged with described
When module be connected, and be grounded by the second resistance.
3. precharge control circuit as claimed in claim 1, it is characterised in that：The pre-charge module include 3rd resistor and
First electric capacity, the first end of the 3rd resistor is connected with the battery pack, the second end and the electricity consumption of the 3rd resistor
Equipment and the relay module are connected, and by first capacity earth.
4. precharge control circuit as claimed in claim 1, it is characterised in that：The time delay module includes the second electric capacity and the
Four resistance, the first end of second electric capacity is connected with the high pressure detection module, the second end of second electric capacity with it is described
Control module is connected, and by the 4th resistance eutral grounding, the time delay of the time delay module is more than or equal to the precharge mould
The charging voltage of block reaches the precharge time of the reference value.
5. precharge control circuit as claimed in claim 1, it is characterised in that：The control module includes timer and electronics
Switch, the timer includes triggering pin and output pin, and the triggering pin is connected to receive with the time delay module
Testing result is stated, the output pin is connected with the first end of the electronic switch, the second end ground connection of the electronic switch, institute
The 3rd end for stating electronic switch is connected with the relay module.
6. precharge control circuit as claimed in claim 5, it is characterised in that：The relay module includes relay, institute
Stating relay includes coil and switch, and the first end of the coil is connected with power supply, the second end and the electronics of the coil
3rd end of switch is connected, and the first end of the switch is connected with the battery pack, the second end and the electricity consumption of the switch
Equipment and the pre-charge module are connected.
7. precharge control circuit as claimed in claim 6, it is characterised in that：The relay module also includes diode,
The anode of the diode is connected with the second end of the coil, the first end phase of the negative electrode of the diode and the coil
Even.
8. precharge control circuit as claimed in claim 5, it is characterised in that：The electronic switch is NMOS FETs,
The first end of the electronic switch, the second end and the 3rd end correspond respectively to grid, drain electrode and the source of the NMOS FETs
Pole.
9. a kind of electric automobile, it is characterised in that：The electric automobile includes the preliminary filling as any one of claim 1-8
Electric control circuit, battery pack and electrical equipment, the battery pack are supplied by the precharge control circuit to the electrical equipment
Electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621183982.3U CN206306853U (en) | 2016-11-03 | 2016-11-03 | Electric automobile and its precharge control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621183982.3U CN206306853U (en) | 2016-11-03 | 2016-11-03 | Electric automobile and its precharge control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206306853U true CN206306853U (en) | 2017-07-07 |
Family
ID=59244895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621183982.3U Active CN206306853U (en) | 2016-11-03 | 2016-11-03 | Electric automobile and its precharge control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206306853U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106564396A (en) * | 2016-11-03 | 2017-04-19 | 深圳市沃特玛电池有限公司 | Electric vehicle and precharging control circuit thereof |
| CN108790924A (en) * | 2018-07-23 | 2018-11-13 | 厦门金龙联合汽车工业有限公司 | A kind of electric vehicle is total to the precharging circuit and its principal and subordinate's pre-charge method of preliminary filling resistance |
| EP3654507A1 (en) * | 2018-11-16 | 2020-05-20 | Siemens Aktiengesellschaft | Monitorable electrical component with at least one functional alignment as capacitor |
-
2016
- 2016-11-03 CN CN201621183982.3U patent/CN206306853U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106564396A (en) * | 2016-11-03 | 2017-04-19 | 深圳市沃特玛电池有限公司 | Electric vehicle and precharging control circuit thereof |
| CN108790924A (en) * | 2018-07-23 | 2018-11-13 | 厦门金龙联合汽车工业有限公司 | A kind of electric vehicle is total to the precharging circuit and its principal and subordinate's pre-charge method of preliminary filling resistance |
| EP3654507A1 (en) * | 2018-11-16 | 2020-05-20 | Siemens Aktiengesellschaft | Monitorable electrical component with at least one functional alignment as capacitor |
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| PP01 | Preservation of patent right |
Effective date of registration: 20180428 Granted publication date: 20170707 |
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Date of cancellation: 20210428 Granted publication date: 20170707 |
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Effective date of registration: 20210428 Granted publication date: 20170707 |