CN208908371U - A kind of pre-charge system of electric car - Google Patents
A kind of pre-charge system of electric car Download PDFInfo
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- CN208908371U CN208908371U CN201821868116.7U CN201821868116U CN208908371U CN 208908371 U CN208908371 U CN 208908371U CN 201821868116 U CN201821868116 U CN 201821868116U CN 208908371 U CN208908371 U CN 208908371U
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Abstract
The utility model is suitable for electric vehicle engineering field, provide a kind of pre-charge system of electric car, it include: power battery circuit, the negative contact terminal other end of the power battery including the connection of negative contact terminal one end of cathode and D.C. contactor, D.C. contactor connects high-voltage load；Connect the pre-charge circuit between power battery anode and high-voltage load, comprising: pre-charge resistance, it is in parallel with the positive contact of D.C. contactor after precharge contactor of connecting；The electromagnetic mechanism of D.C. contactor connects full-vehicle control unit.The utility model connects pre-charge circuit between power battery anode and high-voltage load, powers on for completing to high-voltage load.Positive contact and negative contact terminal are used as main contact, and auxiliary contact is used as precharge contactor, poor using the actuation time between positive contact and auxiliary contact, control powering on for high-voltage load.
Description
Technical field
The utility model belongs to electric vehicle engineering field more particularly to a kind of pre-charge system of electric car.
Background technique
New-energy automobile includes hybrid vehicle, and especially pure electric automobile contains higher battery high-pressure system, is made
System and drive system are provided for the energy, high-voltage system battery voltage is generally greater than 320V, and some motor bus cell voltages are even
Reach 600V, has the characteristics that high voltage, high current.The load of battery system is motor and its frequency convertor system, to ensure
The stability of its work, high-voltage load input the electric capacity of voltage regulation for being terminated with larger capacity；Because large bulk capacitance loads, control system
Rush of current of system when powering on is equipped with pre-charge circuit in high-tension circuit.
The status of existing published the recharge technique: (electric car delivered with " car electrics " fifth phase in 2013
Pre-charge process research) for, simplify new-energy automobile pre-charge circuit structure as shown in Figure 1, by two contactor (KM-
1, KM-2), a pre-charge-relay KP and pre-charge resistance R powered on to control capacitive load, the control terminal of KM-1, KM-2
The control terminal C1 of A1, B1 and pre-charge-relay KP are all connected to BMS, battery voltage 324.6V, and power supply is connect by anode
Tentaculum KM-1, cathode contact device KM-2 power to capacitor C and full-vehicle control unit B MS (IGBT frequency converter).When on electric car
When electric, management system sends out process control pulse, connects KM-1, KM-2, since capacitor C both end voltage is close to 0V, because connection is led
Line and accumulator internal resistance very little, generally less than 0.02 Ω, connection immediate current is very big, can allow connection electricity more than contactor
Stream makes contact generate melting welding, power up is caused to fail.Therefore powering on main order control program should make and pre-charge-relay KP
It is also turned on the concatenated circuit of pre-charge resistance R and cathode contact device KM-2, after capacitor C is pre-charged, then connects first
Logical anode contactor KM-1, pre-charge resistance R is bypassed, such power up could be completed safely.It also provides in the prior art
A kind of new-energy automobile pre-charge circuit as shown in Figure 2, in structure basis shown in Fig. 1, pre-charge resistance precharge
Electric resistance array substitution.
Therefore, judge that precharge is completed to be that extremely pay attention to, big three kinds of the reduction of a fraction of the precharge control strategy of the prior art:
1) acquisition battery voltage and acquire load capacitor voltage value be compared, at two voltage close to it is equal when, sending preliminary filling
Electricity completes signal.2) frequency changer direct current bus electric current is acquired, when DC bus current is close to 0A, precharge is issued and completes letter
Number.3) frequency changer direct current bus voltage is acquired, when DC bus-bar voltage reaches the voltage value of setting, letter is completed in sending precharge
Number.
Published Chinese patent CN106564390A is using controller in control cathode relay, pre-charge-relay
After being in turn switched on positive relay, meets resistor power in the effective resistance for determining resistor matrix, issue precharge and complete
Signal.
Published Chinese patent CN106602622A is also using controller in control cathode relay, precharge relay
After device and positive relay in turn switch on, pre-charge resistance temperature value is being determined after setting range, sending has been pre-charged
At signal.
Analyze from the disclosed prior art, generally existing following defect: 1) pre-charge resistance is easy overheats, burns out, is breaking
Or short circuit illustrates pre-charge resistance above-mentioned several so that sparing no expense to increase pre-charge resistance matrix or increasing real-time monitoring
It is a crucial weak link in the high pressure precharge circuitry of a electric car.2) it needs with controller strictly by one
Fixed sequence controls three relays (contactor) and pre-charge resistance；3) Control system architecture due to complication design, it is right
Pre-charge process detected, compared, is monitored and is caused generally existing precharge success rate lower.
Utility model content
The utility model embodiment provides a kind of pre-charge system of electric car, it is intended to solve preliminary filling in pre-charge circuit
The problem of resistance is safe and reliable, in any case will not be too long because of conduction time, causes pre-charge resistance overload, burns out.
The utility model embodiment is achieved in that a kind of pre-charge system of electric car, comprising:
Power battery circuit, the power battery including the connection of negative contact terminal one end of cathode and D.C. contactor, direct current connect
The negative contact terminal other end of tentaculum connects high-voltage load；
Connect the pre-charge circuit between power battery anode and high-voltage load, comprising: pre-charge resistance；Pre-charge resistance
It is in parallel with the positive contact of D.C. contactor after series connection precharge contactor；
The electromagnetic mechanism of D.C. contactor connects full-vehicle control unit.
Further, the full-vehicle control unit replaces with a control switch, to the electromagnetism of the D.C. contactor
Mechanism powers on, and connects negative contact terminal, precharge contactor, positive contact, powers on pre-charge resistance safely.
Further, the D.C. contactor uses a D.C. contactor or two D.C. contactors；Described two
The electromagnetic mechanism of platform D.C. contactor is connect with full-vehicle control unit.
Further, when the D.C. contactor uses a D.C. contactor, the precharge contactor includes: first
Precharge contactor and the second precharge contactor；
The first precharge contactor of pre-charge resistance one end series connection, the other end the second precharge contactor of series connection, concatenated first
Precharge contactor, pre-charge resistance, the second precharge contactor are in parallel with the positive contact of D.C. contactor.
Further, when the D.C. contactor uses two D.C. contactors, the precharge contactor includes first
Precharge contactor；It is in parallel with the positive contact of D.C. contactor after pre-charge resistance the first precharge contactor of series connection；The anode
Contact and first precharge contactor belong to a D.C. contactor, and the negative contact terminal and one group of auxiliary contact belong to another
Platform D.C. contactor.
Further, when the D.C. contactor uses a D.C. contactor, the negative contact terminal is opened away from, preliminary filling
Electrical contact is opened away from opening than the positive contact away from small 0.8~1mm.
Further, when the D.C. contactor uses two D.C. contactors, the negative contact terminal is opened away from, preliminary filling
Electrical contact is opened away from opening than the positive contact away from small 0.8mm~1mm.
Further, when the D.C. contactor uses two D.C. contactors, the full-vehicle control unit control two
The electromagnetic mechanism of platform D.C. contactor powers on simultaneously.
Further, when the D.C. contactor uses a D.C. contactor, the system also includes: red indicator light
With green indicator light；Between red one the first precharge contactor of end Jie of indicator light and pre-charge resistance, other end ground connection；Green indicator light
Between one the second precharge contactor of end Jie and pre-charge resistance, other end ground connection.
Further, when the D.C. contactor uses two D.C. contactors, the system also includes: red instruction
Lamp；Red indicator light one terminates precharge contactor, other end ground connection.
The utility model has the following beneficial effects: the pre-charge system of electric car provided by the utility model is instead of tradition
The technical solution that capacitive load powers on is controlled by two contactors, a pre-charge-relay and pre-charge resistance,
In the pre-charge system of electric car provided by the utility model, precharge is connected between power battery anode and high-voltage load
Circuit powers on high-voltage load for completing.D.C. contactor has two pairs of main contacts and two pairs of auxiliary contacts, except a control
Outside the positive contact of positive pole, excess-three to be it is small open away from contact, utilize the actuation time of positive contact and auxiliary contact
Difference controls powering on for high-voltage load, when the electromagnetic mechanism coil of D.C. contactor obtains electric, makes the cathode touching for connecting power cathode
Head and auxiliary contact are first closed, and pre-charge resistance is accessed circuit, realize precharge, the anode of positive pole is connected after several ms
Pre-charge resistance and the auxiliary contact as precharge switch are bypassed, complete the power up to high-voltage load by contact closure.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application,
The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model
It limits.In the accompanying drawings:
Fig. 1 is a kind of new-energy automobile pre-charge circuit figure that the prior art provides；
Fig. 2 is another new-energy automobile pre-charge circuit figure that the prior art provides；
The pre-charge system circuit of electric car when Fig. 3 is a D.C. contactor provided by the embodiment of the utility model
Figure；
The pre-charge system circuit of electric car when Fig. 4 is two D.C. contactors provided by the embodiment of the utility model
Figure.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Embodiment one
The utility model embodiment provides a kind of pre-charge system of electric car, as shown in Figure 3-4, comprising:
Power battery circuit 100, the power electric of negative contact terminal KM2 one end T2 connection including cathode and D.C. contactor
Pond, the negative contact terminal KM2 other end L2 connection high-voltage load 300 of D.C. contactor；
Connect the pre-charge circuit 200 between power battery anode and high-voltage load 300, comprising: pre-charge resistance R；In advance
It is in parallel with the positive contact KM1 of D.C. contactor after charging resistor R series connection precharge contactor；
The electromagnetic mechanism of D.C. contactor connects full-vehicle control unit B MS.
In the present embodiment, pre-charge circuit 200 is connected between the anode and high-voltage load of power battery, for completion pair
High-voltage load 300 (capacitor C) powers on.Positive contact KM1 and negative contact terminal KM2 is used as main contact, and auxiliary contact is used as precharge
Contact, poor using the actuation time between positive contact and auxiliary contact, control high-voltage load 300 (capacitor C) powers on, when straight
When the electromagnetic mechanism coil of stream contactor obtains electric, it is closed the negative contact terminal for connecting power cathode and auxiliary contact first, by preliminary filling
Resistance R accesses circuit, realizes precharge, and the positive contact closure of positive pole is connected after several ms, by pre-charge resistance R and
Auxiliary contact bypass as precharge switch, completes the power up to high-voltage load 300 (capacitor C).Pre-charge resistance R string
Join precharge contactor, and be arranged in the closed shell filled with protective gas, the artificial probability very little for causing damage, conduction time is to produce
Contact movement velocity and distance are determined in product power up, only several milliseconds of conduction times, prevent the hair of overheat accident
It is raw, prevent pre-charge resistance to the high-pressure system of electric car and precharge and brings security risk, reliable operation, safety
Height, and control program is few, easy to operate, power-up speeds are fast, power on success rate height.
Pre-charge resistance R selects the Aludirome Cr25Al5 electrothermal alloy resistive conductor of diameter 0.45mm, and length foundation is wanted
It asks determining, the electric car of 500V, the length of resistive conductor about 400mm is greater than for the voltage of power battery；For power electric
The voltage in pond is the electric car of 320V, the length of resistive conductor about 240mm.
It should be noted that verifying above-mentioned precharge switch and preliminary filling in the utility model embodiment with two examples
The high current impulse withstanding capability of resistance:
Example 1, the electric car explanation with the production of certain company: the voltage of power battery is 324.6V, due to precharge time
Several hundred milliseconds of time is not needed, when the utility model embodiment is pre-charged using the actuation time of D.C. contactor as control
Between (about several milliseconds), be by precharge time6Millisecond calculates, and the heating current for paying contact of D.C. contactor can reach I=
20A is connected in breaking capacity and is provided from standard GB/T/the 7.2.4.1 articles of T14048.5-2017: loading class for AC-13
Not, short-time overload is 10 times 40 milliseconds, if being 6 milliseconds from calorific value calculating conduction time, electric current allowable value: IP=I ×
I × 10 × 40/6=20 × 20 × 10 × 40/6=26666.7A2, when energized between when being 6 milliseconds, electric current is tolerable at this time
Value I=163A, at this time pre-charge resistance minimum value are as follows: 324.6/163=1.99 Ω；The utility model embodiment takes R=2.0
Ω, precharge switch connect moment, flow through the maximum current that precharge switch enters capacitor C: IP=UB/ R=324.6/2.0=
162A；UBFor the voltage of power battery, it can be seen that precharge switch and pre-charge resistance are all safe and reliable.
Example 2, power battery voltage be 576V, from calorific value calculate conduction time be6The electric current allowable value of millisecond: this
When electric current allowable value be still I=163A, pre-charge resistance R minimum value at this time are as follows: 576/163=3.53 Ω；The utility model
Embodiment takes R=3.6 Ω, and precharge switch connects moment, flows through the maximum current that precharge switch enters capacitor C: IP=UB/R
=576/3.6=160A；It can be seen that precharge switch and pre-charge resistance are all safe and reliable.
In the utility model embodiment, the shadow of heavy current impact is born in the selection of pre-charge resistance to appliance component
It rings:
The high current that positive contact is born calculates: by taking the positive contact of 300A D.C. contactor as an example, utilizing a direct current
It time (only several millisecond) of the actuation time of contactor as control precharge, is at most calculated (in calculating formula by 6 milliseconds
Take 10ms), provide according in standard GB/T/T14048.4-2010 8.2.4.4 tolerance overload current: 8 times calculate for 10 seconds
:
I × I × 0.01=300A × 300A × 8 × 10S × 1000ms
=7200000A.AS/0.01S=720000000A.A=26800A, if precharge time is no more than 10 milliseconds,
The positive contact of D.C. contactor can bear very big electric current.
In the utility model embodiment, high-voltage load 300 (capacitor C, the i.e. equivalent electricity of high-voltage load end input capacitance
Hold) bear high current calculating: by certain company production electric motor coach for illustrate:
The voltage of power battery is 576V, and maintaining the capacitance of frequency converter steady operation is 1800 microfarads, peak-peak
Electric current I=8000A, according to standard GB/T/T17702-2013 power electronic capacitor, 5.15.3 durability test is simultaneously pressed
1000 times are carried out to it according to 5.9 to discharge, but peak point current IPIt is peak inrush current, I for 1.4I, IP=1.4 × 8000A=
11200A。
The above example illustrates that the charge and discharge current value of allowing of capacitor C is to choose in a big way, it is not necessary to take capacitor into account
It is damaged under instantaneous large-current impact.
Embodiment two
The utility model embodiment provides a kind of pre-charge system of electric car, as shown in Figure 3-4, in embodiment one
On the basis of, D.C. contactor uses a D.C. contactor or two D.C. contactors；When using two D.C. contactors
When, negative contact terminal and auxiliary contact belong to a D.C. contactor, and positive contact and precharge contactor belong to another direct current and connect
Tentaculum；The electromagnetic mechanism of two D.C. contactors is connect with full-vehicle control unit B MS.
In the present embodiment, D.C. contactor can be a tool, and there are two normally opened main contact and two normally opened auxiliary contacts
D.C. contactor or two D.C. contactors with a normally opened main contact and a normally opened auxiliary contact, two ways are equal
Being able to achieve is closed the negative contact terminal for connecting power cathode and auxiliary contact first, by pre-charge resistance
R accesses circuit, realizes precharge, and the positive contact closure of positive pole is connected after several ms, by pre-charge resistance R and is used as pre-
The auxiliary contact of charge switch bypasses, and completes the power up to high-voltage load (capacitor C).
When D.C. contactor is one, A2 is the control terminal of D.C. contactor coil in Fig. 3, is connected to full-vehicle control unit
BMS；When D.C. contactor is two, A3, B3 in Fig. 4 are the control terminal of two D.C. contactor coils respectively, are connected to whole
Vehicle control unit BMS.
Embodiment three
The utility model embodiment provides a kind of pre-charge system of electric car, as shown in figure 3, in embodiment two
On the basis of, when D.C. contactor uses a D.C. contactor, precharge contactor includes: the first precharge contactor KP1 and second
Precharge contactor KP2；
Pre-charge resistance R one end X1 series connection the first precharge contactor KP1, other end X3 the second precharge contactor KP2 of series connection,
The positive contact of concatenated first precharge contactor KP1, pre-charge resistance R, the second precharge contactor KP2 and D.C. contactor
KM1 is in parallel.
In the present embodiment, both ends L1, T1 of positive contact KM1 is separately connected the first precharge contactor KP1, the second precharge
Contact KP2.Pre-charge resistance R is connected between two precharge contactors KP1, KP2, and is arranged in filled with the closed of protective gas
In shell, the artificial probability very little for causing damage, conduction time is that contact movement velocity and distance are determined in product power up,
Only several milliseconds of conduction times, the generation of overheat accident is prevented, has prevented pre-charge resistance to the high-pressure system of electric car
Security risk is brought with precharge, reliable operation is highly-safe, and control program is few, and easy to operate, power-up speeds are fast, power on
Success rate is high.
Example IV
The utility model embodiment provides a kind of pre-charge system of electric car, as shown in figure 4, in embodiment three
On the basis of, when D.C. contactor uses two D.C. contactors, precharge contactor includes the first precharge contactor KP1；Precharge
It is in parallel with the positive contact KM1 of D.C. contactor after the first precharge contactor KP1 of resistance R series connection；Negative contact terminal KM2 and electromagnetic motor
Structure belongs to a D.C. contactor, and positive contact KM1 and the first precharge contactor KP1 belong to another D.C. contactor.
In the present embodiment, both ends L1, T1 of positive contact KM1 is separately connected the first precharge contactor KP1, pre-charge resistance
R。
Embodiment five
The utility model embodiment provides a kind of pre-charge system of electric car, on the basis of embodiment three, directly
When flowing contactor and using a D.C. contactor, negative contact terminal KM2's opens opening away from than positive contact KM1 away from, precharge contactor
It opens away from small 0.8~1mm.
In the present embodiment, when D.C. contactor is a tool, there are two the straight of normally opened main contact and two normally opened load contacts
When flowing contactor, main contact therein be positive it is normally opened away from, excess-three contact be than positive contact open away from it is small by 0.8~
The small of 1mm is opened away from using the D.C. contactor one-shot, the time that contact connects circuit is different, completes pre-charge resistance control
High-voltage load (capacitor C) processed powers on safely, and can be according to the main contact, auxiliary contact and high-voltage load of D.C. contactor
The ability for bearing transient high-current impact of (capacitor C) designs pre-charge resistance and accurately controls the charging time of precharge, really
Protect the failure that pre-charge resistance will not be burnt out.
Embodiment six
The utility model embodiment provides a kind of pre-charge system of electric car, on the basis of embodiment three, directly
When flowing contactor and using two D.C. contactors, negative contact terminal KM2's opens opening away from than positive contact KM1 away from, precharge contactor
It opens away from small 0.8mm~1mm.
In the present embodiment, when D.C. contactor is two straight with a normally opened main contact and normally opened load contact
When flowing contactor, wherein the positive contact as main contact is positive normally opened away from excess-three contact is to compare positive contact
Open away from small 0.8~1mm it is small open away from, it is poor using the actuation time between positive main contact and auxiliary contact, control high-voltage load
(capacitor C's) powers on, and when electromagnetic mechanism coil obtains electric, is closed the main contact for connecting power cathode and auxiliary contact first, will be pre-
Charging resistor R accesses circuit, realizes precharge, and the main contact closure of positive pole is connected after several ms, by pre-charge resistance R and
Auxiliary contact bypass as precharge switch, completes the power up to high-voltage load (capacitor C).
Embodiment seven
The utility model embodiment provides a kind of pre-charge system of electric car, on the basis of embodiment three, directly
When flowing contactor using two D.C. contactors, full-vehicle control unit B MS controls the electromagnetic mechanism of two D.C. contactors simultaneously
It powers on.
In the present embodiment, two D.C. contactors should select the same model of same producer, same by two D.C. contactors
Shi Qidong, the time that contact connects circuit is different, completes pre-charge resistance control high-voltage load (capacitor C) and powers on safely.
Embodiment eight
The utility model embodiment provides a kind of pre-charge system of electric car, as shown in figure 3, in embodiment three
On the basis of, when D.C. contactor uses a D.C. contactor, system further include: red indicator light D1 and green indicator light D2；Red finger
Show between lamp D1 mono- end Jie the first precharge contactor KP1 and pre-charge resistance R, other end ground connection；Green indicator light D2 mono- is terminated
Between the second precharge contactor KP2 and pre-charge resistance R, other end ground connection.
In the present embodiment, green light is dimmed, requires supplementation with electric energy, can realize fast powering-up by start button immediately, is charging
In the process, indicate that pre-charge circuit is working when red light D1 is bright, green light D2 when dark bright during the work time from secretly to bright, indicating
Pre-charge circuit works there are failure, and the voltage at load capacitance both ends does not reach the requirement of precharge.After charging complete,
Red light D1 indicates that cell voltage, green light D2 light levels indicate high-voltage load (capacitor C) both end voltage when bright.If there is pre-
Charge fault can be relatively easy to find out fault point by two indicator lights.
Embodiment nine
The utility model embodiment provides a kind of pre-charge system of electric car, as shown in figure 4, in embodiment three
On the basis of, when D.C. contactor uses two D.C. contactors, system further include: red indicator light D1；Red indicator light D1 mono- is terminated
Precharge contactor, other end ground connection.
In the present embodiment, indicate that pre-charge circuit is working during the charging process, when red light D1 is bright, in charging complete
Afterwards, cell voltage is indicated when red light D1 is bright.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (10)
1. a kind of pre-charge system of electric car characterized by comprising
Power battery circuit, the power battery including the connection of negative contact terminal one end of cathode and D.C. contactor, D.C. contactor
The negative contact terminal other end connect high-voltage load；
Connect the pre-charge circuit between power battery anode and high-voltage load, comprising: pre-charge resistance；Pre-charge resistance series connection
It is in parallel with the positive contact of D.C. contactor after precharge contactor；
The electromagnetic mechanism of D.C. contactor connects full-vehicle control unit.
2. the pre-charge system of electric car as described in claim 1, which is characterized in that the full-vehicle control unit replaces with
One control switch, powers on the electromagnetic mechanism of the D.C. contactor, connects negative contact terminal, precharge contactor, positive contact,
Power on pre-charge resistance safely.
3. the pre-charge system of electric car as described in claim 1, which is characterized in that the D.C. contactor uses one
D.C. contactor or two D.C. contactors；The electromagnetic mechanism of two D.C. contactors connects with full-vehicle control unit
It connects.
4. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses one
When D.C. contactor, the precharge contactor includes: the first precharge contactor and the second precharge contactor；
The first precharge contactor of pre-charge resistance one end series connection, the other end the second precharge contactor of series connection, concatenated first preliminary filling
Electrical contact, pre-charge resistance, the second precharge contactor are in parallel with the positive contact of D.C. contactor.
5. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses two
When D.C. contactor, the precharge contactor includes the first precharge contactor；Pre-charge resistance is connected after the first precharge contactor
It is in parallel with the positive contact of D.C. contactor；The positive contact and first precharge contactor belong to a direct current contact
Device, the negative contact terminal and one group of auxiliary contact belong to another D.C. contactor.
6. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses one
When D.C. contactor, the negative contact terminal opens opening away from opening than the positive contact away from small 0.8 ~ 1mm away from, precharge contactor.
7. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses two
When D.C. contactor, the negative contact terminal open away from, precharge contactor open away from, open away from small 0.8mm than the positive contact ~
1mm。
8. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses two
When D.C. contactor, the electromagnetic mechanism that the full-vehicle control unit controls two D.C. contactors powers on simultaneously.
9. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses one
When D.C. contactor, the system also includes: red indicator light and green indicator light；Red one the first precharge contactor of end Jie of indicator light
Between pre-charge resistance, other end ground connection；Between green one the second precharge contactor of end Jie of indicator light and pre-charge resistance, separately
One end ground connection.
10. the pre-charge system of electric car as claimed in claim 3, which is characterized in that the D.C. contactor uses two
When platform D.C. contactor, the system also includes: red indicator light；Red indicator light one terminates precharge contactor, other end ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821868116.7U CN208908371U (en) | 2018-11-14 | 2018-11-14 | A kind of pre-charge system of electric car |
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| CN201821868116.7U CN208908371U (en) | 2018-11-14 | 2018-11-14 | A kind of pre-charge system of electric car |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256841A (en) * | 2018-11-14 | 2019-01-22 | 沈阳二三控制电器制造有限公司 | A kind of pre-charge system of electric car |
| CN111532133A (en) * | 2019-08-20 | 2020-08-14 | 长城汽车股份有限公司 | Automobile direct-current bus pre-charging method and equipment |
-
2018
- 2018-11-14 CN CN201821868116.7U patent/CN208908371U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109256841A (en) * | 2018-11-14 | 2019-01-22 | 沈阳二三控制电器制造有限公司 | A kind of pre-charge system of electric car |
| CN111532133A (en) * | 2019-08-20 | 2020-08-14 | 长城汽车股份有限公司 | Automobile direct-current bus pre-charging method and equipment |
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