CN110518662A - Battery pack charging unit and control method - Google Patents
Battery pack charging unit and control method Download PDFInfo
- Publication number
- CN110518662A CN110518662A CN201910801215.6A CN201910801215A CN110518662A CN 110518662 A CN110518662 A CN 110518662A CN 201910801215 A CN201910801215 A CN 201910801215A CN 110518662 A CN110518662 A CN 110518662A
- Authority
- CN
- China
- Prior art keywords
- switch
- load
- power supply
- timer
- voltage
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
Abstract
The invention discloses a kind of battery pack charging unit and control methods, it include: power supply circuit, pre-charge circuit and control device, power supply circuit is in parallel with pre-charge circuit, power supply circuit is to apply supply voltage to load, pre-charge circuit is to apply pre- voltage to load, pre- voltage is less than supply voltage, and after pre- voltage reaches certain value, power supply circuit is powered on-off.By to power supply, the circuit in parallel pre-charge circuit that control device is used to detect circuit in the pre- voltage and control power supply circuit, pre-charge circuit of load can reduce surge current, and a switch and a preliminary filling resistance may be implemented as multiple loads precharge, pre-charge circuit cost is reduced, and improves the reliability of pre-charge circuit.
Description
Technical field
The present invention relates to electric vehicle engineering field, in particular to a kind of battery pack charging unit and a kind of charging of battery pack
The control method of device.
Background technique
On existing electric car, electric machine controller input terminal biggish Support Capacitor in parallel, to reduce motor control
The distortion of reactive current and voltage between device and battery processed.For battery, loads as capacitive load, be connected on capacitive load
With the main switch among battery, in the moment of closure switch life can be caused to shorten and even caused by very big surge current
The damage of load isolation.It is general to increase pre-charge circuit to electric machine controller to avoid the electric current, before main switch closure,
It is powered by pre-charge circuit to electric machine controller, after so that the end voltage of electric machine controller is reached certain numerical value, recloses master
Switch reduces surge current.
Pre-charge circuit is made of pre-charge contactor, charging resistor and contactor control loop.Pre-charge contactor is opened
Logical and shutdown direct current, will there is the function of sparkproof and the difficult direct-current arc put out of going out, and manufacturing cost is high.Charging resistor is generally selected
Select the wire resistor of cement sheath or section aluminum shell, it is easy to be burnt, cost is again very high, and increases control loop increase
The complexity of system, reduces the reliability of pre-charge circuit.
With vehicle vehicle mounted electrical apparatus such as DCDC power module, (DC/DC, expression is that high pressure (low pressure) DC power supply is transformed to low pressure
(high pressure) DC power supply.Such as it is low pressure that the DC/DC converter connect on Vehicular direct-current power supply, which is the DC power conversion of high pressure,
Direct current.), air-conditioner controller, the capacity such as charger increase, these did not connect the electrical appliance of precharging circuit there is an urgent need to increase in the past
Add pre-charge circuit, to improve the reliability of system.Pre-charge circuit is by pre-charge contactor, charging resistor and contactor control
Circuit processed is constituted.Pre-charge contactor turns on and off direct current, to there is the function of sparkproof and the direct-current arc that difficulty or ease are put out of going out
Can, manufacturing cost is high.Charging resistor is typically chosen the wire resistor of cement sheath or section aluminum shell.It is easy to be burnt, cost
It is again very high.Increase the complexity that control loop increases system, reduces reliability.
Therefore a kind of reductions surge current and reduction pre-charge circuit cost are needed, and improves the reliable of pre-charge circuit
Property.
Summary of the invention
(1) goal of the invention
To overcome above-mentioned at least one defect of the existing technology, reduce surge current and reduce pre-charge circuit at
This, and the reliability of pre-charge circuit is improved, the invention discloses following technical schemes.
(2) technical solution
As the first aspect of the present invention, the invention discloses a kind of battery pack charging units, comprising:
Power supply circuit, the power supply circuit are used for the electrical energy transportation of battery pack to loading, with the power supply applied to load
Voltage, for at least one load supplying；
At least one pre-charge circuit, the pre-charge circuit is in parallel with the power supply circuit, is used for the battery pack
Electrical energy transportation to loading, to apply pre- voltage to load, wherein the pre- voltage is less than the supply voltage；
Control device, the control device are used to control the on-off of the power supply circuit, the pre-charge circuit, Yi Jijian
The value for surveying the pre- voltage is closed the power supply circuit when the detection pre- voltage value reaches threshold value.
In a kind of possible embodiment, the power supply circuit includes:
First fuse and first switch, first fuse, the first switch main contacts, the battery pack and negative
Load is sequentially connected in series, and the first switch is used to control the on-off of the power supply circuit, for controlling at least one load.
In a kind of possible embodiment, the pre-charge circuit includes:
Second fuse, second switch, resistance and diode, second fuse, the second switch main contacts, institute
It states resistance, the diode, the battery pack and load to be sequentially connected in series, the second switch is for controlling the precharge
The on-off of circuit.
In a kind of possible embodiment, the diode is connected to the cathode output end of the battery pack and loads just
Between terminal or the diode is connected between the cathode output end of the battery pack and load negative terminal.
In a kind of possible embodiment, the charging unit is additionally provided with third switch, the battery pack, described the
Three switch main contacts and load are sequentially connected in series, and the third switch is for controlling the power supply circuit, the pre-charge circuit.
In a kind of possible embodiment, the control device includes:
First timer, the first timer are used for the interval for judging to be pre-charged twice；
Second timer, the second timer are used to control time and the judgement precharge time-out of precharge；
Detector, the detector are used to detect the value of the pre- voltage, when the detection pre- voltage value reaches threshold value,
It is closed the power supply circuit, the detector is also used to detect the timing time of the timer, when detection first timing
When device reaches the first timer threshold value, it is closed the pre-charge circuit, reaches described the when detecting the second timer
When two Timer Thresholds, it is closed the power supply circuit.
In a kind of possible embodiment, the charging unit further include:
Battery management system, the battery management system are connected to the control terminal of all switches, and with and with
All timer connections.
In a kind of possible embodiment, all switches select touch switch or electronic switch.
As a second aspect of the invention, the invention also discloses a kind of control methods of battery pack preliminary filling charging unit:
S1, judges whether first timer is greater than the threshold value of first timer, if being less than threshold value, executes S11；
S2 is closed second switch, connects pre-charge circuit；
S3 starts second timer；
S4 detects the output voltage of load；
S5, judges whether output voltage is greater than threshold value, executes S8 if more than threshold value；
S6, judges whether second timer is greater than the threshold value of second timer, if being less than the threshold value of second timer, executes
S4；
S7, second timer time-out, then be closed flag bit；
S8 is closed first switch, connects main power supply circuit；
S9 restarts first timer；
S10, delay disconnect second switch；
S11 exits pre-charge circuit；
S12 is closed first switch, connects main power supply circuit；
S13, first timer restarting；
S14 exits pre-charge circuit.
As the third aspect of the present invention, the invention also discloses a kind of electric cars, comprising:
Charging unit described in any of the above-described technical solution.
(3) beneficial effect
Battery pack charging unit disclosed by the invention and control method, have the following beneficial effects:
1, the power supply circuit powering load of battery pack generates very big surge current in the moment of closure power supply circuit,
Pre-charge circuit is in parallel with power supply circuit, surge current is reduced, the service life of switch is improved.
2, load increases pre-charge circuit, reduces the voltage difference at load both ends, to improve the reliability of system.
3, fuse is set in power supply circuit and pre-charge circuit, prevents the electric current in circuit excessive, plays overload protection.
4, will multiple loads it is in parallel after, be connected to power supply circuit and pre-charge circuit, realize multiple loads together precharge and
Power supply, reduces section components, reduces costs.
5, precharge control method reduces pre-charge operation number, and has preliminary filling time-out and voltage detecting, and increasing can
By property.
Detailed description of the invention
It is exemplary below with reference to the embodiment of attached drawing description, it is intended to for the explanation and illustration present invention, and cannot manage
Solution is the limitation to protection scope of the present invention.
Fig. 1 is a kind of circuit diagram of the first embodiment of battery pack charging unit disclosed by the invention.
Fig. 2 is the specific implementation circuit diagram of battery pack charging unit.
Fig. 3 is a kind of flow chart of the first embodiment of the control method of battery pack charging unit disclosed by the invention.
Specific embodiment
To keep the purposes, technical schemes and advantages of the invention implemented clearer, below in conjunction in the embodiment of the present invention
Attached drawing, technical solution in the embodiment of the present invention is further described in more detail.
It should be understood that in the accompanying drawings, from beginning to end same or similar label indicate same or similar element or
Element with the same or similar functions.Described embodiments are some of the embodiments of the present invention, rather than whole implementation
Example, in the absence of conflict, the features in the embodiments and the embodiments of the present application can be combined with each other.Based in the present invention
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It shall fall within the protection scope of the present invention.
Below with reference to the first embodiment of battery pack charging unit disclosed in Fig. 1-Fig. 2 the present invention is described in detail.This implementation
Example is mainly used in electric car, reduces surge current and reduces pre-charge circuit cost, and improves the reliable of pre-charge circuit
Property.
As depicted in figs. 1 and 2, the present embodiment mainly includes, power supply circuit, at least one pre-charge circuit and control fill
Set 400.
Battery pack 210 is electric to other electric appliances offer on electric car for providing electric power to electric car, while also
Power, such as air-conditioner controller, charger.
Power supply circuit includes battery pack 210, for the electrical energy transportation of battery pack 210 extremely to be loaded 100, to load 100
Apply supply voltage, pre-charge circuit is in parallel with power supply circuit, pre-charge circuit for by the electrical energy transportation of battery pack 210 to bear
100 are carried, to apply pre- voltage to load 100, the numerical value of pre- voltage is less than the numerical value of supply voltage, that is to say, that load 100
Before charging, first load 100 is pre-charged, after so that it is reduced the voltage difference at load 100 and supply voltage both ends, to load
100 charge.
Control device 400 is used to control opening and disconnecting for power supply circuit and pre-charge circuit, and the pre- voltage value of detection,
When the pre- voltage value of detection reaches threshold value, power supply circuit is closed to apply supply voltage to load 100.When control device 400 connects
When receiving the order to the charging of load 100, control device 400 starts pre-charge circuit, is pre-charged to load 100, when negative
When the pre- voltage of load 100 reaches threshold value, control device 400 starts power supply circuit and charges to load 100, then disconnects preliminary filling
Circuit.
In one embodiment, power supply circuit includes: the first fuse 220 and first switch 230.First fuse
220,230 main contacts of first switch, battery pack 210 and load 100 are sequentially connected in series, and first switch 230 is for controlling power supply
The on-off of circuit.One end of output the first fuse 220 of termination of battery pack 210, another termination first of the first fuse 220
One end of switch 230, one end of another terminating load 100 of first switch 230 load 100 another termination battery pack 210
The other end, so that the circuit of power supply circuit is formed, for providing electric energy to load 100.
In one embodiment, pre-charge circuit includes: the second fuse 310, second switch 320, resistance 330 and two
Pole pipe 340, the second fuse 310,320 main contacts of second switch, resistance 330, diode 340, battery pack 210 and load 100
It is sequentially connected in series, second switch 320 is used to control the on-off of pre-charge circuit.The second insurance of output termination of battery pack 210
One end of silk 310, the other end of the second fuse 310 are connect with one end of second switch 320, the other end of second switch 320
Connect with one end of resistance 330, the other end of resistance 330 is connect with one end of diode 340, the other end of diode 340 with
One end connection of load 100, loads 100 other end and connect with the other end of battery pack 210, to form pre-charge circuit
Circuit, for providing pre- electric energy to load 100 before power supply circuit is to 100 offer electric energy of load.
In one embodiment, diode 340 is connected to 100 plus ends of cathode output end and load of battery pack 210
Between or diode 340 be connected to battery pack 210 cathode output end and load 100 negative terminals between.
There are two types of the connections of pre-charge circuit, and one is the anode outputs of battery pack 210 to connect the one of the second fuse 310
End, the other end of the second fuse 310 are connect with one end of second switch 320, the other end and resistance 330 of second switch 320
One end connection, the other end of resistance 330 connect with the anode of diode 340, the cathode of diode 340 with load 100 and bear
Terminal connection, loads 100 plus end and connect with the other end of battery pack 210, to form the circuit of pre-charge circuit.
Another connection is that the cathode output of battery pack 210 connects one end of the second fuse 310, the second fuse 310
The other end is connect with one end of second switch 320, and the other end of second switch 320 is connect with one end of resistance 330, resistance 330
The other end connect with the cathode of diode 340, diode 340 anode with load 100 negative terminal connect, load 100
Plus end is connect with the other end of battery pack 210, to form the circuit of pre-charge circuit.
In one embodiment, charging unit is additionally provided with third switch 350, and battery pack 210, third switch 350 are main
Contact and load 100 are sequentially connected in series, and third switch 350 is for controlling power supply circuit, pre-charge circuit.That is, third is opened
One end of pass 350 is connect with one end of battery pack 210, and the other end of third switch 350 is connect with load 100.
The anode of battery pack 210 connects one end of the contact of third switch 350, another termination of the contact of third switch 350
The anode of load 100 or the cathode of battery pack 210 connect one end of the contact of third switch 350, the contact of third switch 350
Another terminating load 100 negative terminal.For save the cost, third switch 350 be can be omitted, and battery pack 210 is directly connected to bear
Carry 100.
In one embodiment, all switch selects touch switch, in the present invention, the normally opened contact of contact-making switch
With circuit connection.
In one embodiment, control device 400 includes: first timer, second timer and detector.Wherein
One timer is used for the interval for judging to be pre-charged twice；Second timer is used to control the maximum time of precharge and judges preliminary filling
Electric time-out；Detector is used to detect the value of pre- voltage, when the pre- voltage value of detection reaches threshold value, is closed power supply circuit.
In one embodiment, charging unit includes: battery management system 410, and battery management system 410 is connected to institute
There is the control terminal of switch, and connect with all timers, for controlling opening and disconnecting for power supply circuit and pre-charge circuit.
The coil both ends of contact-making switch are connect with the both ends of battery management system 410 respectively.
It is respectively electric machine controller, DCDC, electric air-conditioning and vehicle-mounted fills as shown in Fig. 2, is provided with 4 loads in the present invention
Motor.
The anode of battery pack connects one end of fuse F1, one end of the main contacts of another termination switch K1 of fuse F1,
Another anode for terminating to electric machine controller output terminal of the main contacts of switch K1；The anode of battery pack 210 meets fuse F5
One end, one end of another terminating resistor R of fuse F5, the anode of another terminating diode D1 of resistance R, diode D1's
Cathode connects the anode of electric machine controller output terminal；The cathode of battery pack connects one end of the contact of switch K6, the contact of switch K6
The negative terminal of another termination electric machine controller output terminal；The control terminal of switch K1, switch K5 and switch K6 are coupled with BMS
(battery management system) both ends.
When establishing starting voltage in control terminal K1 and the K6 closure of switch K1 and switch K6, electric machine controller output terminal.When
When control terminal K5, the K6 closure of switch K5 and switch K6, the capacitor inside electric machine controller passes through the limit of resistance R and diode D1
Stream completes precharge work.
Pre-charge contactor is that switch K6 is connected in parallel on switch K6 master and opens after main contacts and charging resistor the R series connection of switch K6
It closes on contact, the main switch contactor circuit switch K6 is closed pre-charge contactor contact switch before switch K6 main switch closure
K5, by means of the charging current of the metering function limitation load of preliminary filling resistance R.Voltage at electric machine controller end is increased to centainly
When value, closure switch K1, because the potential difference at contact both ends is small, to avoid in the upper excessive surge of the electric shock of switch K1, K6
Electric current, protective switch.
The anode of battery pack connects one end of fuse F2, one end of the main contacts of another termination switch K2 of fuse F1,
Another anode for terminating to DCDC (power module) output terminal of the main contacts of switch K2；The anode of battery pack meets fuse F5
One end, one end of another terminating resistor R of fuse F5, the anode of another terminating diode D2 of resistance R, diode D2's
Cathode connects the anode of DCDC output terminal；The cathode of battery pack 210 connects one end of the contact of switch K6, and the contact of switch K6 is another
Terminate the negative terminal of DCDC output terminal；The control terminal of switch K2, switch K5 and switch K6 are coupled with the both ends BMS.
When establishing starting voltage in control terminal K1 and the K6 closure of switch K2 and switch K6, DCDC output terminal.As switch K5
When being closed with control terminal K5, K6 of switch K6, the capacitor inside DCDC completes precharge by the current limliting of resistance R and diode D2
Work, to realize a switch and a preliminary filling resistance for multiple loads precharge.
The anode of battery pack connects one end of fuse F3, one end of the main contacts of another termination switch K3 of fuse F3,
Another anode for terminating to electric air-conditioning output terminal of the main contacts of switch K3；The anode of battery pack meets the one of fuse F5
End, one end of another terminating resistor R of fuse F5, the anode of another terminating diode D3 of resistance R, the cathode of diode D3
Connect the anode of electric air-conditioning output terminal；The cathode of battery pack connects one end of the contact of switch K6, the contact other end of switch K6
Connect the negative terminal of electric air-conditioning output terminal；The control terminal of switch K3, switch K5 and switch K6 are coupled with the both ends BMS.
When establishing starting voltage in control terminal K1 and the K6 closure of switch K3 and switch K6, electric air-conditioning output terminal.When opening
When closing control terminal K5, the K6 closure of K5 and switch K6, the capacitor inside electric air-conditioning is complete by the current limliting of resistance R and diode D3
At precharge work.
The anode of battery pack connects one end of fuse F4, one end of the main contacts of another termination switch K4 of fuse F4,
Another anode for terminating to Vehicular charger output terminal of the main contacts of switch K4；The anode of battery pack meets the one of fuse F5
End, one end of another terminating resistor R of fuse F5, the anode of another terminating diode D4 of resistance R, the cathode of diode D4
Connect the anode of Vehicular charger output terminal；The cathode of battery pack 210 connects one end of the contact of switch K6, and the contact of switch K6 is another
One end connects the negative terminal of Vehicular charger output terminal；The control terminal of switch K4, switch K5 and switch K6 are coupled with BMS two
End.
When establishing starting voltage in control terminal K1 and the K6 closure of switch K4 and switch K6, Vehicular charger output terminal.When
When control terminal K5, the K6 closure of switch K5 and switch K6, the capacitor inside Vehicular charger passes through the limit of resistance R and diode D4
Stream completes precharge work.
It is real below with reference to first of the control method of a kind of battery pack charging unit disclosed in Fig. 1-3 the present invention is described in detail
Apply example.The present embodiment is mainly used in electric car, reduces surge current and reduces pre-charge circuit cost, and improves precharge
The reliability of circuit.
As shown in Figure 1-3, the present embodiment mainly includes the device recorded in battery pack charging unit first embodiment, and control
Method processed.
Power supply circuit, power supply circuit are used to supply the electrical energy transportation of battery pack 210 to load 100 to apply load 100
Piezoelectric voltage, for at least one load supplying；
At least one pre-charge circuit, pre-charge circuit is in parallel with power supply circuit, for by the electrical energy transportation of battery pack 210
To load 100, to apply pre- voltage to load 100, wherein pre- voltage is less than supply voltage；
Control device 400, control device 400 are used to control the on-off of power supply circuit, pre-charge circuit, and the pre- electricity of detection
The value of pressure is closed power supply circuit when the pre- voltage value of detection reaches threshold value.
In a kind of possible embodiment, power supply circuit includes:
First fuse 220 and first switch 230, the first fuse 220,230 main contacts of first switch, battery pack 210
It is sequentially connected in series with load 100, first switch 230 is used to control the on-off of power supply circuit, for controlling at least one load.
In a kind of possible embodiment, pre-charge circuit includes:
Second fuse 310, second switch 320, resistance 330 and diode 340, the second fuse 310, second switch
320 main contacts, resistance 330, diode 340, battery pack 210 and load 100 are sequentially connected in series, and second switch 320 is for controlling
The on-off of pre-charge circuit processed.
In a kind of possible embodiment, diode 340 is connected to cathode output end and the load 100 of battery pack 210
Between plus end or diode 340 is connected between 100 negative terminals of cathode output end and load of battery pack 210.
In a kind of possible embodiment, charging unit is additionally provided with third switch 350, battery pack 210, third switch
350 main contacts and load 100 are sequentially connected in series, and third switch 350 is for controlling power supply circuit, pre-charge circuit.
In a kind of possible embodiment, control device 400 includes:
First timer, first timer are used for the interval for judging to be pre-charged twice；
Second timer, second timer are used to control time and the judgement precharge time-out of precharge；
Detector, detector are used to detect the value of pre- voltage, when the pre- voltage value of detection reaches threshold value, closure power supply electricity
Road.
In a kind of possible embodiment, charging unit further include:
Battery management system 410, battery management system 410 are connected to the control terminal of all switches, and with all timings
Device connection.
In a kind of possible embodiment, all switches select touch switch or electronic switch.
As shown in figure 3, in one embodiment, S1 judges whether first timer is greater than the threshold value of first timer,
If being less than threshold value, S11 is executed；
S2 is closed second switch, connects pre-charge circuit；
S3 starts second timer；
S4 detects the output voltage of load；
S5, judges whether output voltage is greater than threshold value, executes S8 if more than threshold value；
S6, judges whether second timer is greater than the threshold value of second timer, if being less than the threshold value of second timer, executes
S4；
S7, second timer time-out, then be closed flag bit；
S8 is closed first switch, connects main power supply circuit；
S9 restarts first timer；
S10, delay disconnect second switch；
S11 exits pre-charge circuit；
S12 is closed first switch, connects main power supply circuit；
S13, first timer restarting；
S14 exits pre-charge circuit.
Specific step are as follows: S1 checks first timer, if first timer does not reach timing, into S11；
S11 is closed first switch 230, gives load 100 power supply；
S12 restarts first timer；
S13 exits power supply circuit start-up course.
When BMS receive to capacitive load 100 be powered on instruction after, first check for first periodically when whether reaching timing
Between Tth1, if first timer does not reach timing Tth1, first switch 230 charges to capacitive load 100, first
Timer starting, to exit start-up course.
S2 checks first timer, if first timer reaches timing, into S21；
S21 is closed second switch 320, gives load 100 power supply, load 100 is made to generate pre- voltage；
S22 starts second timer, starts timing；
S23, the pre- voltage of 100 output of detector detection load, if pre- voltage reaches threshold value, into S26；
S24, if pre- voltage is not up to threshold value, detector detects the time of second timer, if not reaching second timer
Timing time, into s23；
S25 enters if second timer reaches second timer timing time and sets time-out closure flag bit；
S26 is closed first switch 230, gives load 100 power supply；
S27 restarts first timer；
S28, delay disconnect second switch 320；
S29 completes the precharge to load 100.When BMS receive to load 100 be powered on instruction after, first check for
Whether the first timing reaches timing Tth1, if first timer does not reach timing Tth1, second switch 320,
It is pre-charged to load 100, second timer starting, and starts timing, secondly the voltage value of 100 output of detection load, if reaching
To threshold value, then it being closed first switch 230, gives load 100 charging, first timer starting, delay disconnects second switch 320, from
And exit power supply circuit start-up course.
If judging whether second timer reaches timing time after the voltage value of 100 output of detection load does not reach threshold value
Tth2 then sets time-out closure flag bit, is closed first switch 230 if reaching timing time Tth2, gives load 100 charging, the
The starting of one timer, delay disconnects second switch 320, to exit pre-charge circuit start-up course.
If second timer is to reach timing time Tth2, it is back to the voltage value of 100 output of detection load, again to negative
The voltage value for carrying 100 outputs is detected, and above-mentioned movement is then repeated.
As shown in Fig. 2, specifically, the first timer Initialize installation made in BMS is at arrival timing Tth1.When
It receives after connecting the instruction of circuit with DCDC to electric machine controller, first checks for whether the first timer in BMS reaches calmly
When time Tth1, if not reaching timing Tth1, BMS closure switch K1, switch K2 and switch K6, connect circuit, give
100 power supply of load.Meanwhile starting first timer, exit startup program.If having reached the timing of first timer
Tth1, then closure switch K5 and switch K6, powers to electric machine controller and DCDC, and electric current passes through switch K5, resistance R, diode
The pre-charge circuit that D1, diode D2 are constituted charges to DCDC and electric machine controller.Start second timer, second timer
Start timing, detection 100 output voltages of load, if the voltage of 100 output of load reaches threshold value Uth, closure switch K1 and opens
K2 is closed, delay disconnects preliminary filling relay, exits charging process.If the voltage of 100 output of load is not up to threshold value Uth, detect
Whether second timer reaches timing time Tth2, if reaching timing time Tth1, sets time-out closure flag bit, closure switch
K1 and switch K2, delay disconnect preliminary filling relay, exit charging process.If second timer does not reach timing time Tth2,
Again detection 100 output voltage values of load and second timer, meet until having ready conditions, exit preliminary filling process.
Below with reference to a kind of first embodiment of electric car disclosed in Fig. 1-Fig. 3 the present invention is described in detail.The present embodiment
It is mainly used in electric car, reduce surge current and reduces pre-charge circuit cost, and improves the reliability of pre-charge circuit.
As shown in Figure 1-Figure 3, the present embodiment mainly includes the device recorded in battery pack charging unit first embodiment, main
There are load 100, power supply circuit, pre-charge circuit and control device 400, comprising:
Power supply circuit, power supply circuit are used to supply the electrical energy transportation of battery pack 210 to load 100 to apply load 100
Piezoelectric voltage, for at least one load supplying；
At least one pre-charge circuit, pre-charge circuit is in parallel with power supply circuit, for by the electrical energy transportation of battery pack 210
To load 100, to apply pre- voltage to load 100, wherein pre- voltage is less than supply voltage；
Control device 400, control device 400 are used to control the on-off of power supply circuit, pre-charge circuit, and the pre- electricity of detection
The value of pressure is closed power supply circuit when the pre- voltage value of detection reaches threshold value.
In a kind of possible embodiment, power supply circuit includes:
First fuse 220 and first switch 230, the first fuse 220,230 main contacts of first switch, battery pack 210
It is sequentially connected in series with load 100, first switch 230 is used to control the on-off of power supply circuit, for controlling at least one load.
In a kind of possible embodiment, pre-charge circuit includes:
Second fuse 310, second switch 320, resistance 330 and diode 340, the second fuse 310, second switch
320 main contacts, resistance 330, diode 340, battery pack 210 and load 100 are sequentially connected in series, and second switch 320 is for controlling
The on-off of pre-charge circuit processed.
In a kind of possible embodiment, diode 340 is connected to cathode output end and the load 100 of battery pack 210
Between plus end or diode 340 is connected between 100 negative terminals of cathode output end and load of battery pack 210.
In a kind of possible embodiment, charging unit is additionally provided with third switch 350, battery pack 210, third switch
350 main contacts and load 100 are sequentially connected in series, and third switch 350 is for controlling power supply circuit, pre-charge circuit.
In a kind of possible embodiment, control device 400 includes:
First timer, first timer are used for the interval for judging to be pre-charged twice；
Second timer, second timer are used to control time and the judgement precharge time-out of precharge；
Detector, detector are used to detect the value of pre- voltage, when the pre- voltage value of detection reaches threshold value, closure power supply electricity
Road.
In a kind of possible embodiment, charging unit further include:
Battery management system 410, battery management system 410 are connected to the control terminal of all switches, and with all timings
Device connection.
In a kind of possible embodiment, all switches select touch switch or electronic switch.
The specific structure of the components such as the load 100, power supply circuit, pre-charge circuit and control device 400 of the present embodiment is equal
It can refer to structure setting described in the first embodiment of aforementioned battery pack charging unit, no longer repeat one by one.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by those skilled in the art, should all cover
Within protection scope of the present invention.Therefore, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of battery pack charging unit characterized by comprising
Power supply circuit, the power supply circuit are used to loading, to apply supply voltage to load, use the electrical energy transportation of battery pack
In at least one load supplying；
At least one pre-charge circuit, the pre-charge circuit is in parallel with the power supply circuit, for by the electricity of the battery pack
It can be delivered to load, to apply pre- voltage to load, wherein the pre- voltage is less than the supply voltage；
Control device, the control device are used to control the on-off of the power supply circuit, the pre-charge circuit, and detection institute
The value for stating pre- voltage is closed the power supply circuit when the detection pre- voltage value reaches threshold value.
2. charging unit as described in claim 1, which is characterized in that the power supply circuit includes:
First fuse and first switch, first fuse, the first switch main contacts, the battery pack and load according to
Secondary series connection, the first switch is used to control the on-off of the power supply circuit, for controlling at least one load.
3. charging unit as described in claim 1, which is characterized in that the pre-charge circuit includes:
Second fuse, second switch, resistance and diode, second fuse, the second switch main contacts, the electricity
Resistance, the diode, the battery pack and load are sequentially connected in series, and the second switch is for controlling the pre-charge circuit
On-off.
4. charging unit as claimed in claim 3, which is characterized in that the anode that the diode is connected to the battery pack is defeated
Outlet and load plus end between or the diode be connected to the battery pack cathode output end and load negative terminal it
Between.
5. charging unit as described in claim 1, which is characterized in that the charging unit is additionally provided with third switch, described
Battery pack, the third switch main contacts and load are sequentially connected in series, and third switch is for controlling the power supply circuit, described
Pre-charge circuit.
6. charging unit as described in claim 1, which is characterized in that the control device includes:
First timer, the first timer are used for the interval for judging to be pre-charged twice；
Second timer, the second timer are used to control time and the judgement precharge time-out of precharge；
Detector, the detector are used to detect the value of the pre- voltage, reach pre- voltage threshold when detecting the pre- voltage value
When, it is closed the power supply circuit.
7. the charging unit as described in Claims 2 or 3 or 5 or 6, which is characterized in that the charging unit further include:
Battery management system, the control terminal of the battery management system connection and all switches, and connect with all timers.
8. the charging unit as described in Claims 2 or 3 or 5, which is characterized in that all switches select touch switch
Or electronic switch.
9. a kind of control method of battery pack charging unit, which is characterized in that step are as follows:
S1, judges whether first timer is greater than the threshold value of first timer, if being less than threshold value, executes S11；
S2 is closed second switch, connects pre-charge circuit；
S3 starts second timer；
S4 detects the output voltage of load；
S5, judges whether output voltage is greater than threshold value, executes S8 if more than threshold value；
S6, judges whether second timer is greater than the threshold value of second timer, if being less than the threshold value of second timer, executes S4；
S7, second timer time-out, then be closed flag bit；
S8 is closed first switch, connects main power supply circuit；
S9 restarts first timer；
S10, delay disconnect second switch；
S11 exits pre-charge circuit；
S12 is closed first switch, connects main power supply circuit；
S13, first timer restarting；
S14 exits pre-charge circuit.
10. a kind of electric car characterized by comprising
Charging unit described in any one of the claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910801215.6A CN110518662A (en) | 2019-08-28 | 2019-08-28 | Battery pack charging unit and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910801215.6A CN110518662A (en) | 2019-08-28 | 2019-08-28 | Battery pack charging unit and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110518662A true CN110518662A (en) | 2019-11-29 |
Family
ID=68627727
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910801215.6A Pending CN110518662A (en) | 2019-08-28 | 2019-08-28 | Battery pack charging unit and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110518662A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644859A (en) * | 2021-08-17 | 2021-11-12 | 河南牧原智能科技有限公司 | Power-on method, device and equipment for high-voltage distribution box of new energy automobile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202737512U (en) * | 2012-07-19 | 2013-02-13 | 隆鑫通用动力股份有限公司 | Motor controller pre-charging control system and electric car thereof |
| CN105322622A (en) * | 2015-11-27 | 2016-02-10 | Tcl移动通信科技（宁波）有限公司 | Temperature-based method and system for setting charging current of mobile terminal |
| CN106410834A (en) * | 2016-12-05 | 2017-02-15 | 苏州协鑫集成储能科技有限公司 | Soft start circuit for rechargeable battery |
| CN107437834A (en) * | 2017-07-03 | 2017-12-05 | 深圳市沃特玛电池有限公司 | A kind of double contactor control circuits and control method |
-
2019
- 2019-08-28 CN CN201910801215.6A patent/CN110518662A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202737512U (en) * | 2012-07-19 | 2013-02-13 | 隆鑫通用动力股份有限公司 | Motor controller pre-charging control system and electric car thereof |
| CN105322622A (en) * | 2015-11-27 | 2016-02-10 | Tcl移动通信科技（宁波）有限公司 | Temperature-based method and system for setting charging current of mobile terminal |
| CN106410834A (en) * | 2016-12-05 | 2017-02-15 | 苏州协鑫集成储能科技有限公司 | Soft start circuit for rechargeable battery |
| CN107437834A (en) * | 2017-07-03 | 2017-12-05 | 深圳市沃特玛电池有限公司 | A kind of double contactor control circuits and control method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113644859A (en) * | 2021-08-17 | 2021-11-12 | 河南牧原智能科技有限公司 | Power-on method, device and equipment for high-voltage distribution box of new energy automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6593363B2 (en) | Power system | |
| CN101740839B (en) | Battery system | |
| US8575940B2 (en) | Power supply device and method for detecting non-contact state of load connected to power supply device | |
| CN102934316B (en) | Battery system and method for controlling battery system | |
| US9190831B2 (en) | Power supply system, vehicle incorporating the same and method for controlling power supply system | |
| US10017138B2 (en) | Power supply management system and power supply management method | |
| CN110138044B (en) | Power battery charging and discharging control system and method and vehicle | |
| CN102195333A (en) | Direct-current power source apparatus | |
| EP1067654A1 (en) | Electric car battery pack charging device and a method | |
| US20170264136A1 (en) | Multiple Energy Accumulator System for Motor Vehicle Electrical Systems | |
| US10333179B2 (en) | Method for operating a battery system, battery system and motor vehicle | |
| CN103119822A (en) | Electrical storage system and method for controlling electrical storage system | |
| CN102545678A (en) | Inverter and startup method thereof | |
| CN103855748A (en) | Vehicle charging system and method | |
| CN103531861A (en) | Battery and motor vehicle | |
| CN105416069B (en) | A kind of power supply for electric car | |
| CN102801189A (en) | Rechargeable battery power supply starter and cell balancing apparatus | |
| US20150274024A1 (en) | Charge transfer method and related electric device | |
| CN111284356A (en) | Mobile energy storage charging pile and control method thereof | |
| US20110156620A1 (en) | Battery protection system and method thereof | |
| CN110518662A (en) | Battery pack charging unit and control method | |
| US20180037132A1 (en) | Secondary lithium battery for vehicle use | |
| EP3059831A1 (en) | Secondary lithium battery for vehicle use | |
| CN110816311A (en) | Method for operating a battery pack system and electric vehicle | |
| JP7185750B2 (en) | Charging/discharging device, charging/discharging system, and charging/discharging control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191129 |
|
| RJ01 | Rejection of invention patent application after publication |