CN208571658U - A kind of BMS charge control system that can be worked under low pressure power shortage state - Google Patents
A kind of BMS charge control system that can be worked under low pressure power shortage state Download PDFInfo
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- CN208571658U CN208571658U CN201821170648.3U CN201821170648U CN208571658U CN 208571658 U CN208571658 U CN 208571658U CN 201821170648 U CN201821170648 U CN 201821170648U CN 208571658 U CN208571658 U CN 208571658U
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Abstract
The utility model discloses the BMS charge control systems that one kind can work under low pressure power shortage state, including BMS mainboard, detection module and power supply unit, feedback connects signal to BMS mainboard to activate after detection module is connected with power supply unit, power supply unit is fed back according to the voltage swing for the CP test point for characterizing battery voltage in the detection module to the BMS mainboard after activation, BMS mainboard sends CP signal to detection module as needed, detection module controls the voltage of CP test point according to CP signal, to control the power supply state of power supply unit；In the state that CP signal keeps inputting, the voltage value that will test the CP test point of module is set as characterizing the voltage of storage battery power shortage state for it.The utility model innovates CP control mode by the improvement to BMS circuit, reaches the function of charging gun power shortage charging.
Description
Technical field
The utility model relates to electric car charging technique field, especially one kind to work under low pressure power shortage state
BMS charge control system.
Background technique
New-energy automobile either mixes by force, plug-in/extended-range hybrid power, pure electric automobile, on whole system framework all
Replace original generator with DC-DC, with the motor direct-drive vehicle of high pressure.The change of entire 12V electrical architecture, so that
The use characteristic of original 12V battery produces change, its effect just only becomes an auxiliary energy unit, without
Instantaneous high power is provided.DC-DC can carry out electric current and voltage relatively accurate due to itself being power electronics control unit
Control, it is possible to realize energy management to 12V battery, in such a situa-tion so that module in 12V bus compared with
It is more.We it is also envisioned that the case where be, due to several respects factor:
A) electronic control module is more, it is assumed that traditional module is set as 1mA~5mA, and overall quiescent current is larger.
B) electronic control module is more, and the sleep awakening mechanism of CAN network is complex, especially charging (fast charge and full
Punching) when, cause the battery of 12V when tradition is parked, needs to consume more electric energy.
C) control logic of module, especially because the monitoring demand of access car networking, so that vehicle electronic system is patrolled
It collects to jump and becomes relatively fragile, can not may allow completely under certain conditions vehicle " suspend mode ".
So according to these judgements and foreign vehicle some complaints in use, it is relatively high a possibility that occur
Problem is exactly not have to a period of time (several days or one week or more) in vehicle, this vehicle may be in the case where high-tension battery full electricity, just
Do not start.
The reason of canvassing the inside, is primarily due to, although the module normal working voltage that we set is usually 9~16V,
The lead-acid battery of power shortage once exports electric current, and voltage will continue to persistently fall down, and causes storage battery electric power insufficient, and then influence
Maintain the reliable actuation of charge relay.So according to standard empirical, we may quote second piece of battery, with interior power shortage
Battery is together in parallel, and until vehicle launch gets up, battery one is taken away, and vehicle control system all continues power down and closes, high-voltage electricity
Pond maintains output to need to guarantee that contactor has enough holding voltage and currents to supply, once battery does not give power, this system is also
It is that can fall down.In the case, it directly connects AC charging rifle to charge to electric vehicle, because BMS does not have internal storage battery electric power
Supply, BMS system can not start internal communication and identification of shaking hands, can not execute charging action so as to cause charging gun；If
Charging gun cannot provide 12V and supply electricity to electric vehicle power sources system, just be unable to reach the purpose of charging；If what is connected is DC charging
Plug, this situation may be more easy to handle.
Utility model content
In view of the above-mentioned deficiencies of the prior art, technical problem to be solved by the utility model is to provide one kind to lose in low pressure
The BMS charge control system to work under electricity condition.
In order to solve the above technical problems, technical solution adopted in the utility model is: one kind can be in low pressure power shortage state
The BMS charge control system of lower work, including BMS mainboard, detection module and power supply unit, detection module and power supply unit are connected
Feedback connects signal to BMS mainboard to activate afterwards, and power supply unit is according to the CP test point for characterizing battery voltage in the detection module
Voltage swing feedback to the BMS mainboard after activation, BMS mainboard sends CP signal to detection module, detection module as needed
The voltage of CP test point is controlled, according to CP signal to control the power supply state of power supply unit；It keeps the shape of input in CP signal
Under state, the voltage value that will test the CP test point of module is set as characterizing the voltage of storage battery power shortage state.
In above-mentioned technical proposal, the detection module is equipped with regulating circuit, to carry out pressure regulation, pressure regulation electricity to CP test point
Road includes several resistance and an at least control switch, input terminal of the control terminal of the control switch as CP signal, several electricity
Resistance is realized adjustment resistance by the closing or opening of control switch with control switch composition to realize the pressure regulation electricity of adjustment voltage
Road.
In above-mentioned technical proposal, diode D1 is in series between the regulating circuit and CP test point.
In above-mentioned technical proposal, the CP test point is in series with a current-limiting resistance R1.
In above-mentioned technical proposal, several resistance compositions are at least with the parallel resistance of two branches, the branch of one of them
Road resistance is in series with the control switch；When CP signal keeps inputting, control switch keeps normally closed, so that parallel resistance has
Effect, when CP blackout, control switch is disconnected, so that parallel resistance fails.
In above-mentioned technical proposal, the regulating circuit includes resistance R2, resistance R3, control switch S2 and control switch Q1,
One end of resistance R2 and the input terminal of control switch S2 are electrically connected, the other end of resistance R2 and the output end of control switch S2
It is electrically connected respectively with the both ends of resistance R3, the input terminal of control switch Q1 and the control terminal of control switch S2 are electrically connected, control
Make input terminal of the control terminal of switch Q1 as CP signal, one end ground connection of control switch Q1, control switch S2 and resistance R3.
In above-mentioned technical proposal, the regulating circuit is also parallel with concatenated resistance R10 and resistance R11, resistance R10 and electricity
The node between node and control switch S2 control terminal and control switch Q1 input terminal between resistance R11 crosses.
The beneficial effects of the utility model are:
1. compatibility: by the design to BMS, achieving the purpose that also charge when controlling 12V discharged or defective battery, while simultaneous
Hold the charge function of normal mode.
2. economic and practical: the Functional Design is little to BMS cost impact, economic and practical, and design efficiently, is promoted and is easy.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
As shown in Figure 1, a kind of BMS charge control system that can be worked under low pressure power shortage state, including BMS mainboard, inspection
Survey module and power supply unit, after detection module and power supply unit are connected feedback connection signal to BMS mainboard to activate, power supply unit
According to the voltage swing feedback for the CP test point for characterizing battery voltage in the detection module to the BMS mainboard after activation, BMS mainboard
CP signal is sent as needed to detection module, and detection module controls the voltage of CP test point according to CP signal, to control power supply
The power supply state of equipment；In the state that CP signal keeps inputting, the voltage value that will test the CP test point of module is set as it
Characterize the voltage of storage battery power shortage state.
Wherein, the detection module is equipped with regulating circuit, and to carry out pressure regulation to CP test point, which includes several
Resistance and at least a control switch, input terminal of the control terminal of the control switch as CP signal, several resistance and the control
Switch composition is realized adjustment resistance by the closing or opening of control switch to realize the regulating circuit of adjustment voltage.The pressure regulation
Diode D1 is in series between circuit and CP test point.The CP test point is in series with a current-limiting resistance R1.
Wherein, several resistance compositions are at least with the parallel resistance of two branches, the branch resistance series connection of one of them
There is the control switch；When CP signal keeps inputting, control switch keeps normally closed, so that parallel resistance is effective, when CP believes
Number disappear when, control switch disconnect so that parallel resistance fail.
Wherein, the regulating circuit includes resistance R2, resistance R3, control switch S2 and control switch Q1, and the one of resistance R2
End is electrically connected with the input terminal of control switch S2, the output end of the other end of resistance R2 and control switch S2 respectively with resistance
The both ends of R3 are electrically connected, and the input terminal of control switch Q1 and the control terminal of control switch S2 are electrically connected, control switch Q1's
Input terminal of the control terminal as CP signal, one end ground connection of control switch Q1, control switch S2 and resistance R3.The pressure regulation electricity
Road is also parallel with concatenated resistance R10 and resistance R11, the node between resistance R10 and resistance R11 and control switch S2 control terminal
Node between control switch Q1 input terminal crosses.
In the present embodiment, R1=1.00K；R3=2.70K；R4=1.30K；R10=100K；R11=100K；D1 diode Vf=
0.7V；When S2 is normally off, Rf=R3//R2//(R10+R11)=0.866K；At this time: Vcp=(12-0.7)/(1+Rf) * Rf+
0.7V=5.944V；At this point, just meeting charging gun charging detection voltage achievees the purpose that charging.
Utility model works principle: the S2 of Fig. 1 is designed as normally closed mode, and (in the state that CP is inputted, S2 enters normal
Close pattern).
In the case where 12V discharged or defective battery, BMS cisco unity malfunction, BMS can not carry out the identification and charging of CP signal
Control, under the premise of this, when CP signal accesses, according to circuit theory, S2 enters normally closed mode, at this point, CP test point is 6V electricity
Flat, charger is directly entered charge mode at this time.
When charger enters charge mode, BMS obtains the charging source from charging gun CHG12V, into normal work mould
Formula, conjunction make charging process obtain Detection & Controling.
When BMS detects that battery completely fills signal, BMS opens Q1 by CPU_CP_DRV, disconnects S2, charging gun CP inspection
Measuring point detects 9V level, stops charging.
Above embodiment only indicates that rather than limits the utility model, therefore all according to the utility model patent application
The equivalent change or modification that method described in range is done, is included in the scope of the utility model patent application.
Claims (7)
1. the BMS charge control system that one kind can work under low pressure power shortage state, including BMS mainboard, detection module and power supply
Equipment, feedback connects signal to BMS mainboard to activate after detection module is connected with power supply unit, and power supply unit is according to the detection mould
The voltage swing feedback of the CP test point of characterization battery voltage is sent as needed to the BMS mainboard after activation, BMS mainboard in block
CP signal is to detection module, and detection module controls the voltage of CP test point according to CP signal, to control the power supply shape of power supply unit
State；It is characterized by: the voltage value that will test the CP test point of module is set as characterizing in the state that CP signal keeps inputting
The voltage of storage battery power shortage state.
2. the BMS charge control system that one kind according to claim 1 can work under low pressure power shortage state, feature exist
It is equipped with regulating circuit in: the detection module, to carry out pressure regulation to CP test point, which includes several resistance and at least
One control switch, input terminal of the control terminal of the control switch as CP signal, several resistance and the control switch form by
The closing or opening of control switch adjusts resistance to realize to realize the regulating circuit for adjusting voltage.
3. the BMS charge control system that one kind according to claim 2 can work under low pressure power shortage state, feature exist
In: diode D1 is in series between the regulating circuit and CP test point.
4. the BMS charge control system that one kind according to claim 1 or 2 can work under low pressure power shortage state, special
Sign is: the CP test point is in series with a current-limiting resistance R1.
5. the BMS charge control system that one kind according to claim 2 can work under low pressure power shortage state, feature exist
In: several resistance compositions at least have the parallel resistance of two branches, and the branch resistance of one of them is in series with the control
System switch；When CP signal keeps inputting, control switch keeps normally closed, so that parallel resistance is effective, when CP blackout, control
System switch disconnects, so that parallel resistance fails.
6. the BMS charge control system that one kind according to claim 5 can work under low pressure power shortage state, feature exist
In: the regulating circuit includes resistance R2, resistance R3, control switch S2 and control switch Q1, and one end and the control of resistance R2 is opened
The input terminal for closing S2 is electrically connected, and the other end of resistance R2 and the output end of control switch S2 are electric with the both ends of resistance R3 respectively
Property connection, the control terminal of the input terminal of control switch Q1 and control switch S2 is electrically connected, the control terminal conduct of control switch Q1
The input terminal of CP signal, one end ground connection of control switch Q1, control switch S2 and resistance R3.
7. the BMS charge control system that one kind according to claim 6 can work under low pressure power shortage state, feature exist
In: the regulating circuit is also parallel with concatenated resistance R10 and resistance R11, the node and control between resistance R10 and resistance R11
Node between system switch S2 control terminal and control switch Q1 input terminal crosses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821170648.3U CN208571658U (en) | 2018-07-16 | 2018-07-16 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821170648.3U CN208571658U (en) | 2018-07-16 | 2018-07-16 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
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| CN208571658U true CN208571658U (en) | 2019-03-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821170648.3U Expired - Fee Related CN208571658U (en) | 2018-07-16 | 2018-07-16 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964181A (en) * | 2018-07-16 | 2018-12-07 | 东莞市德尔能新能源股份有限公司 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
-
2018
- 2018-07-16 CN CN201821170648.3U patent/CN208571658U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108964181A (en) * | 2018-07-16 | 2018-12-07 | 东莞市德尔能新能源股份有限公司 | A kind of BMS charge control system that can be worked under low pressure power shortage state |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200817 Address after: Building 2, 3 and 4, Xiulin SME Incubation Park, No. 71, Shishou Avenue, Shishou Economic Development Zone, Jingzhou City, Hubei Province Patentee after: Hubei delneng New Energy Technology Co.,Ltd. Address before: 523000, No. 243 North Long Road, Lane head, Dalang Town, Dongguan, Guangdong Patentee before: DONGGUAN DRN NEW ENERGY Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210414 Address after: 464000 No.76, Liuwa Industrial Park, Xinyang high tech Zone, Henan Province Patentee after: Henan Dexi new energy Co.,Ltd. Address before: 434000 Building 2, 3 and 4, Xiulin small and medium sized Enterprise Incubation Park, No. 71, Shishou Avenue, Shishou Economic Development Zone, Jingzhou City, Hubei Province Patentee before: Hubei delneng New Energy Technology Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211028 Address after: 434499 Room 401, building 4, Xiulin SME Incubation Park, No. 71, Shishou Avenue, Shishou Economic Development Zone, Jingzhou City, Hubei Province (self declaration) Patentee after: Hubei DEX new energy Co.,Ltd. Address before: 464000 No.76, Liuwa Industrial Park, Xinyang high tech Zone, Henan Province Patentee before: Henan Dexi new energy Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20221027 Address after: Room 1530, Block B, Fenghui Times Technology Center, Shijia Community, Matian Street, Guangming District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Electric Genie Sales Co.,Ltd. Address before: 434499 Room 401, building 4, Xiulin SME Incubation Park, No. 71, Shishou Avenue, Shishou Economic Development Zone, Jingzhou City, Hubei Province (self declaration) Patentee before: Hubei DEX new energy Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190301 |