CN109823180A - A kind of precharging circuit of power battery - Google Patents
A kind of precharging circuit of power battery Download PDFInfo
- Publication number
- CN109823180A CN109823180A CN201711173862.4A CN201711173862A CN109823180A CN 109823180 A CN109823180 A CN 109823180A CN 201711173862 A CN201711173862 A CN 201711173862A CN 109823180 A CN109823180 A CN 109823180A
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- China
- Prior art keywords
- relay
- preliminary filling
- electronic switch
- low
- circuit
- Prior art date
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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
-
- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present invention discloses a kind of precharging circuit of power battery, it include: main positive relay, main negative relay and battery management controller, battery management controller includes electronic switch, Chip-R, micro-control unit, the low side driving of preliminary filling relay, the driving of preliminary filling relay flash and high/low-voltage isolation circuit.Preliminary filling relay and preliminary filling resistance electronization are integrated in battery management controller, save the arrangement space of the preliminary filling relay and preliminary filling resistance inside battery pack, and the low voltage wiring harness arrangement of original preliminary filling relay control signal is saved, keep the structure of precharging circuit more compact；And electronic switch compares mechanical relay, and the influence of noise in closure also greatly reduces, and avoids relay mechanical breakdown.
Description
Technical field
The present invention relates to electric automobile power battery technical fields, more specifically to a kind of preliminary filling of power battery
Circuit.
Background technique
Precharging circuit is one of electric automobile high-voltage security fields important technology.The main function of precharging circuit is to power
The bulky capacitor of cell load such as electric machine controller (i.e. inverter) charges, and then when the main relay closure of reduction battery pack
Spark phenomenon of arc discharge occur, reduce impact, increase vehicle safety.
Existing precharging circuit design scheme is preliminary filling relay and preliminary filling resistance outside battery management controller, preliminary filling after
There are certain volumes for electric appliance and preliminary filling resistance, and battery management controller and preliminary filling relay control signal connection wiring harness have centainly
Length increases complexity when battery pack internal mechanism arrangement.
Summary of the invention
In view of this, the present invention proposes a kind of precharging circuit of power battery, it is intended to realize the preliminary filling saved inside battery pack
The arrangement space of relay and preliminary filling resistance makes the overall compact purpose of the structure of precharging circuit.
To achieve the goals above, it is proposed that scheme it is as follows:
A kind of precharging circuit of power battery, comprising: main positive relay, main negative relay and battery management controller；
The battery management controller includes electronic switch, Chip-R, micro-control unit, the low side drive of preliminary filling relay
Dynamic, preliminary filling relay flash driving and high/low-voltage isolation circuit；
The normally opened contact of the positive relay of master is connected between the anode of power battery and the first end of load；
The normally opened contact of the negative relay of master be connected to the power battery cathode and the load second end it
Between；
The junction of the anode of the normally opened contact and power battery of the positive relay of master is through being connected in series
The electronic switch and the Chip-R connect with the first end of the load；
The low-voltage module of the high/low-voltage isolation circuit is separately connected the low side driving of the preliminary filling relay and the preliminary filling
The high-pressure modular of the driving of relay flash, the high/low-voltage isolation circuit connects the electronic switch；
The coil of the coil of main positive relay and the negative relay of the master described in the micro-control unit controls whether it is electric,
The micro-control unit also passes through electricity described in the low side driving of the preliminary filling relay and the preliminary filling relay flash drive control
The on-off of sub switch.
Preferably, the electronic switch are as follows: metal-oxide-semiconductor.
Preferably, the operating voltage of the metal-oxide-semiconductor is 690V, operating current 17.5A, conduction impedance are 0.19 Ω, open
Opening voltage is 4.5V.
Preferably, the operating voltage of the Chip-R be 500V, rated power 100W, thermal resistance be 1.5 DEG C/W.
Preferably, the electronic switch and the Chip-R are fixed on printed circuit board by automatic Welding Process
On.
Preferably, the electronic switch and the Chip-R are realized by the inside cabling of printed circuit board in printing electricity
The connection of road plate and other electronic devices.
Preferably, the electronic switch and the Chip-R pass through radiating insulating glue and the battery management controller
Metal shell is connected.
Preferably, the low-voltage module of the high/low-voltage isolation circuit includes light emitting diode, the high/low-voltage isolation circuit
High-pressure modular include photodiode.
Preferably, between the high-pressure modular and the electronic switch of the high/low-voltage isolation circuit further include:
High-voltage switch gear protects circuit, and the high-voltage switch gear protection circuit includes TVS diode, inductance, resistance and counnter attack two
Pole pipe, the TVS diode be used to ensure the unblocked level of the electronic switch in the voltage range of safety, the inductance and
The resistance is used to ensure the driving current of the electronic switch in the current range of safety, and the counnter attack diode prevents instead
To electronic switch described in circuit damage.
Compared with prior art, technical solution of the present invention has the advantage that
A kind of precharging circuit for power battery that above-mentioned technical proposal provides, comprising: main positive relay, main negative relay and
Battery management controller, battery management controller include electronic switch, Chip-R, micro-control unit, the low side of preliminary filling relay
Driving, the driving of preliminary filling relay flash and high/low-voltage isolation circuit.Preliminary filling relay and preliminary filling resistance electronization are integrated in electricity
In the Management Controller of pond, the arrangement space of the preliminary filling relay and preliminary filling resistance inside battery pack is saved, and saves original
There is the low voltage wiring harness of preliminary filling relay control signal to arrange, keeps the structure of precharging circuit more compact；And electronic switch is compared
Mechanical relay, the influence of noise in closure also greatly reduces, and avoids relay mechanical breakdown.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of the precharging circuit of power battery provided in an embodiment of the present invention；
Fig. 2 is a kind of inside preliminary filling control structure schematic diagram of power source management controller provided in an embodiment of the present invention.
Specific embodiment
Preliminary filling relay and preliminary filling resistance are outside battery management controller in existing precharging circuit design scheme, and preliminary filling
The movement of relay is mechanical action.The present invention is by the way that battery management controller and preliminary filling relay and preliminary filling resistance to be integrated in
Together, the arrangement space for effectively saving the preliminary filling relay and preliminary filling resistance inside battery pack further saves former pre-
The low voltage wiring harness arrangement for filling relay control signal, so that the structure of precharging circuit is more compact.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
The precharging circuit for present embodiments providing a kind of power battery, referring to Fig. 1, the circuit include: main positive relay 2,
Main negative relay 3 and battery management controller 4；
Battery management controller 4 includes electronic switch 41, Chip-R 42, micro-control unit 43, the low side of preliminary filling relay
Driving 44, preliminary filling relay flash driving 45 and high/low-voltage isolation circuit 46；
The normally opened contact of main positive relay 2 is connected between the anode of power battery 1 and the first end of load 5；
The normally opened contact of main negative relay 3 is connected between the cathode of power battery 1 and the second end of load 5；
Electronic switch 41 of the junction of the anode of the normally opened contact and power battery 1 of main positive relay 2 through being connected in series and
Chip-R 42 is connect with the first end of load 5；
The low-voltage module of high/low-voltage isolation circuit 46 is separately connected the low side driving 44 of preliminary filling relay and preliminary filling relay is high
Side driving 45, the high-pressure modular of high/low-voltage isolation circuit 46 connects electronic switch 41；
The coil of the coil of the main positive relay 2 of the control of micro-control unit 43 and main negative relay 3 whether electric, microcontroller list
Member 43 also passes through the on-off of 45 control electronic switch 41 of the low side driving 44 of preliminary filling relay and the driving of preliminary filling relay flash.
The control principle of the precharging circuit of power battery: when micro-control unit 43 receives power-up request, microcontroller list
The coils of the main negative relays 3 of the first control of member 43 obtain it is electric, to be closed the normally opened contact of main negative relay 3；Then micro-control unit
43 control electronic switches 41 are connected；Finally when 41 turn-on time of electronic switch reaches the time (i.e. preliminary filling completion) of preliminary filling electric current,
The coil of the main positive relay 2 of the control of micro-control unit 43 obtain it is electric, to be closed the normally opened contact of main positive relay 2.When it is main just after
After the normally opened contact of electric appliance 2 is closed completely, micro-control unit 43 disconnects electronic switch 41, what power battery 1 can be safe at this time
It powers to load 5.
Under the conditions of working performance is comparable, electronic switch 41 has advantage relative to tradition machinery relay:
(1), device volume is small.Electronic switch 41 is made of chemical material, is encapsulated in the shell of small volume；And it is mechanical
In the cavity by encapsulation such as coil, iron core, switch contact, sealing ring, insulating materials, volume is larger for relay.
(2), closure sound is small.Electronic switch 42 carries out on-off by chemical material characteristic, almost noiseless；Mechanical relay
It is closed by mechanical contact by electromagnetic action, noise is larger.
Electronic switch 41 and Chip-R 42 are fixed on a printed circuit board by automatic Welding Process.Consider electronic cutting
The ontology of heat dissipation when pass 41 and Chip-R 42 work, electronic switch 41 and Chip-R 42 is existed by radiating insulating glue connection
On the metal shell (not shown) of battery management controller 4, radiated by the large area of metal shell.
Electronic switch 41 and Chip-R pass through printed circuit in the connection line of printed wiring board and other electronic devices
The inside cabling of plate is realized, arrangement space is greatly saved.So that the integrated level of battery management controller 4 is further mentioned
It is high.
Electronic switch 41 and Chip-R 42 work in the high-pressure section of electrokinetic cell system, and the control of electrokinetic cell system
Device work processed realizes that the voltage of high-low pressure working region is isolated in low-pressure section, by high/low-voltage isolation circuit 46.High-low pressure every
From the signal transmission that circuit 46 is also used to the side driving 44 low with preliminary filling relay of preliminary filling relay flash driving 45.
Referring to fig. 2, high/low-voltage isolation circuit 46 is specially light-coupled isolation device, and left side of dotted line is high-pressure modular, and dotted line is right
Side is low-voltage module；The low-voltage module of high/low-voltage isolation circuit 46 includes light emitting diode, the high pressure of high/low-voltage isolation circuit 46
Module includes photodiode.
When micro-control unit 43 will control the conducting of electronic switch 41, it is first closed preliminary filling relay flash driving 45, it is outer at this time
12V power supply conducting in portion's is input to the anode of the light emitting diode of high/low-voltage isolation circuit 46；The low side of preliminary filling relay is reclosed to drive
Dynamic 46, the cathode of light emitting diode is grounded, at this time LEDs ON, works normally and shine；High/low-voltage isolation circuit 46
Photodiode the potential difference with certain driving capability can be generated based on photoelectric effect, electronic switch is made by the potential difference
41 conductings.
Between the high-pressure modular and electronic switch 41 of high/low-voltage isolation circuit 46 further include:
High-voltage switch gear protects circuit 47, and it includes TVS diode, inductance, resistance and counnter attack two that high-voltage switch gear, which protects circuit 47,
Pole pipe, TVS diode are used to ensure the unblocked level of electronic switch 41 in the voltage range of safety, and inductance and resistance are for protecting
Hinder the driving current of electronic switch 41 in the current range of safety, counnter attack diode prevents reverse current from damaging electronic switch
41。
The effect of preliminary filling relay is charged to the power battery load such as bulky capacitor of electric machine controller, to reduce electricity
The spark arcing of the main relay closed type of Chi Bao reduces impact.Therefore, the type selecting of electronic switch must satisfy high voltage operation
It is sufficiently low etc. that environment, short time can bear higher operating current, conduction impedance.Preferred electronic switch 41 is metal-oxide-semiconductor, should
The operating voltage of metal-oxide-semiconductor is 690V, operating current 17.5A, conduction impedance are 0.19 Ω, cut-in voltage 4.5V.
The type selecting of Chip-R, which should meet, can bear short time thermal shock, bear entire preliminary filling week several electric current and
Thermal shock brought by external short circuit thermal shock and frequent power-on and power-off under unusual service condition.The operating voltage of Chip-R 42 is
500V, rated power 100W, thermal resistance are 1.5 DEG C/W.The operating current of Chip-R 42 is according to electrokinetic cell system total voltage
Difference has different requirements, and conduction impedance also has different requirements according to Full Vehicle System and preliminary filling electric current.
Herein, relational terms such as first and second and the like be used merely to by an entity or operation with it is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to the packet of nonexcludability
Contain, so that the process, method, article or equipment for including a series of elements not only includes those elements, but also including
Other elements that are not explicitly listed, or further include for elements inherent to such a process, method, article, or device.
In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including the element
Process, method, article or equipment in there is also other identical elements.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.
To the above description of disclosed embodiment of this invention, it can be realized professional and technical personnel in the field or use this
Invention.Various modifications to these embodiments will be readily apparent to those skilled in the art, institute herein
The General Principle of definition can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore,
The present invention will not be limited to the embodiments shown herein, and is to fit to special with principles disclosed herein and novelty
The consistent widest scope of point.
Claims (9)
1. a kind of precharging circuit of power battery characterized by comprising main positive relay, main negative relay and battery management
Controller；
The battery management controller includes electronic switch, Chip-R, the low side driving of micro-control unit, preliminary filling relay, pre-
Fill the driving of relay flash and high/low-voltage isolation circuit；
The normally opened contact of the positive relay of master is connected between the anode of power battery and the first end of load；
The normally opened contact of the negative relay of master is connected between the cathode of the power battery and the second end of the load；
Institute of the junction through being connected in series of the anode of the normally opened contact and power battery of the positive relay of master
Electronic switch and the Chip-R is stated to connect with the first end of the load；
The low-voltage module of the high/low-voltage isolation circuit is separately connected the low side driving of the preliminary filling relay and the preliminary filling relay
The high-pressure modular of the driving of device flash, the high/low-voltage isolation circuit connects the electronic switch；
The coil of the coil of main positive relay and the negative relay of the master described in the micro-control unit controls whether it is electric, it is described
Micro-control unit also passes through electronic cutting described in the low side driving of the preliminary filling relay and the preliminary filling relay flash drive control
The on-off of pass.
2. circuit according to claim 1, which is characterized in that the electronic switch are as follows: metal-oxide-semiconductor.
3. circuit according to claim 2, which is characterized in that the operating voltage of the metal-oxide-semiconductor is 690V, operating current is
17.5A, conduction impedance be 0.19 Ω, cut-in voltage 4.5V.
4. circuit according to claim 1, which is characterized in that the operating voltage of the Chip-R is 500V, specified function
Rate is 100W, and thermal resistance is 1.5 DEG C/W.
5. circuit described in any one according to claim 1~4, which is characterized in that the electronic switch and patch electricity
Resistance is fixed on a printed circuit board by automatic Welding Process.
6. circuit according to claim 5, which is characterized in that the electronic switch and the Chip-R pass through printing electricity
The inside cabling of road plate realizes the connection in printed circuit board and other electronic devices.
7. circuit described in any one according to claim 1~4, which is characterized in that the electronic switch and patch electricity
Resistance is connected by radiating insulating glue with the metal shell of the battery management controller.
8. circuit according to claim 1, which is characterized in that the low-voltage module of the high/low-voltage isolation circuit includes shining
Diode, the high-pressure modular of the high/low-voltage isolation circuit include photodiode.
9. circuit according to claim 1, which is characterized in that the high-pressure modular of the high/low-voltage isolation circuit and institute
It states between electronic switch further include:
High-voltage switch gear protects circuit, and high-voltage switch gear protection circuit includes TVS diode, inductance, resistance and counnter attack diode,
The TVS diode be used to ensure the unblocked level of the electronic switch in the voltage range of safety, the inductance and described
Resistance is used to ensure the driving current of the electronic switch in the current range of safety, and the counnter attack diode prevents reversed electricity
Stream damages the electronic switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173862.4A CN109823180B (en) | 2017-11-22 | 2017-11-22 | Pre-charging circuit of power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711173862.4A CN109823180B (en) | 2017-11-22 | 2017-11-22 | Pre-charging circuit of power battery |
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| CN109823180A true CN109823180A (en) | 2019-05-31 |
| CN109823180B CN109823180B (en) | 2022-04-26 |
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| CN201711173862.4A Active CN109823180B (en) | 2017-11-22 | 2017-11-22 | Pre-charging circuit of power battery |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110406381A (en) * | 2019-09-02 | 2019-11-05 | 常州索维尔电子科技有限公司 | Power battery precharge switch device based on IGBT module |
| CN111049227A (en) * | 2019-12-31 | 2020-04-21 | 苏州绿控传动科技股份有限公司 | Pre-charging circuit and charging method for motor controller |
| CN112793422A (en) * | 2019-10-24 | 2021-05-14 | 中车时代电动汽车股份有限公司 | Protection control circuit |
| CN113484586A (en) * | 2021-07-13 | 2021-10-08 | 上海中科深江电动车辆有限公司 | Device for detecting auxiliary power consumption differential pressure of electric automobile high-voltage relay control |
| CN114995891A (en) * | 2022-05-31 | 2022-09-02 | 维沃移动通信有限公司 | Non-contact starting method and device |
| US11996722B2 (en) | 2020-06-29 | 2024-05-28 | Dongguan Poweramp Technology Limited | Electrochemical apparatus, electrical apparatus, electric vehicle, and power supply control method |
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| CN110406381A (en) * | 2019-09-02 | 2019-11-05 | 常州索维尔电子科技有限公司 | Power battery precharge switch device based on IGBT module |
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| CN113484586A (en) * | 2021-07-13 | 2021-10-08 | 上海中科深江电动车辆有限公司 | Device for detecting auxiliary power consumption differential pressure of electric automobile high-voltage relay control |
| CN114995891A (en) * | 2022-05-31 | 2022-09-02 | 维沃移动通信有限公司 | Non-contact starting method and device |
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