CN105730378A - Digital power supply control system used for charging machine - Google Patents
Digital power supply control system used for charging machine Download PDFInfo
- Publication number
- CN105730378A CN105730378A CN201610095728.6A CN201610095728A CN105730378A CN 105730378 A CN105730378 A CN 105730378A CN 201610095728 A CN201610095728 A CN 201610095728A CN 105730378 A CN105730378 A CN 105730378A
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- digital
- power supply
- control unit
- control system
- controller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
Abstract
The invention discloses a digital power supply control system used for a charging machine. The digital power supply control system comprises a power adapter, a secondary auxiliary power supply circuit, a CAN bus controller and a digital control unit. The digital control unit is connected with a BMS or a VCU through the CAN bus controller. The CAN bus controller controls the secondary auxiliary power supply circuit to supply power to the digital control unit. The system is characterized in that a control signal line between the digital control unit and the CAN bus controller is connected with a downward-pulling capacitor, one end of the capacitor is connected with a control signal line, and the other end of the capacitor is grounded. By the adoption of the system, the risks of software upgrading failures can be thoroughly eliminated, and meanwhile the normal effect of a dormancy awakening function is guaranteed.
Description
Technical field
The present invention relates to the numerical control system of ECU in electric automobile (ECU), particularly relate to a kind of wake up with CAN, sleep mode, simultaneously need to realized the online upgrading function of digital display circuit software by CAN communication, for the digital power control system of the vehicle-mounted charger of electric automobile.
Background technology
Digital power by its construction cycle height short, portable, control the advantage such as flexible and achieve and be widely applied, particularly in needing in the mutual electric automobile battery charger of communication, digital power can not replace especially.In Vehicular charger, not only the application software of charger is carried out upgrade maintenance, in addition it is also necessary to charger possess wake up, sleep mode.Current charger all passes through bus (CAN) controller (TJA1043A such as NXP) and battery management system (BMS) or other electronic control units (ECU) communication, and the application software of charger completes upgrading also by CAN controller and refreshes.
Under wake-up states, digital signal processor (DSP) is drawn high control signal wire (STB) pin and is kept system power supply normal, and when needs dormancy, DSP drags down STB pin, by CAN chip to electricity under system.
But to control chip IC(DSP or MCU) carry out software upgrade process needs to IC reset operation, and the STB pin state DSP after resetting is defaulted as low level, if resetting time is longer, system will power down, thus software upgrading failure.And if STB pin is adopted pull-up resistor design, although can solving the failed problem of upgrading, but can not realize again sleep mode, because STB pin level state is dependent on external circuit after DSP power down, pull-up is then height, and system is re-powered again.
Prior art extends power down time by the electric capacity of increase accessory power supply mostly as far as possible so that during DSP resets, system is unlikely to power down.But this method resets and the compatibility waking sleep mode up when fundamentally not solving upgrading, and there is following shortcoming: first this method yet suffers from the risk that upgrading is failed, secondly during DSP resets, system power supply is also unstable, reduce life-span and the stability of control chip, again increase bulky capacitor at minimum system auxiliary power output end and add product cost.
Summary of the invention
It is an object of the invention to the defect existed for above-mentioned prior art, it is proposed to a kind of for electric automobile
The digital power control system of load charger, this system can eliminate the risk that the software upgrading of digitial controller is failed thoroughly, ensures that it wakes normally acting on of sleep mode up simultaneously.
The technical solution used in the present invention is, a kind of digital power control system for charger, including power supply changeover device, secondary auxiliary power circuit, CAN controller and digital control unit, described digital control unit is connected with battery management system (BMS) or whole-control system (VCU) by CAN controller, described CAN controller controls a level auxiliary power circuit and powers to digital control unit, it is characterized in that: the control signal wire between described digital control unit with CAN controller is connected a drop-down electric capacity, this electric capacity one terminates control signal wire, other end ground connection.
Described secondary auxiliary power circuit includes: the external 12V DC source (accumulator) connected by a diode, it is listed as CAN controller powers by the inside 12V accessory power supply that a diode is connected with power supply changeover device, external 12V DC source and internal 12V accessory power supply；CAN controller is powered to digital control unit by a transistor control circuit and a level shifting circuit.
Described digital control unit has the function being realized digital display circuit on-line software updating and dormancy awakening by CAN communication.
In one embodiment, described drop-down electric capacity adopts capacity to be the small capacitances of 47pF；Described CAN controller adopts TJA1043 series CAN chip；Described digital control unit adopts DSP or MCU.
It is an advantage of the current invention that and can eliminate the risk that software upgrading is failed thoroughly, ensure to wake up the normal effect of sleep mode simultaneously.Further it is proposed that control circuit reliable, simple, cost is low.
Accompanying drawing explanation
Fig. 1 is principles of the invention block diagram；
Fig. 2 is secondary auxiliary power circuit block diagram in the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, invention is described in detail.
The digital power control system that the present invention proposes includes: power supply changeover device, CAN controller and digital control unit, and digital control unit is communicated with battery management system (BMS) or whole-control system (VCU) by CAN controller.Also including a level auxiliary power circuit, described CAN controller controls secondary auxiliary power circuit and powers to digital control unit.The technical scheme that the present invention proposes increases a minimum drop-down electric capacity (47pF) on the holding wire between the STB pin of DSP and CAN control chip.This electric capacity one terminates STB control signal wire, other end ground connection.
The charger internal auxiliary power supply transducer of low-voltage DC is turned as it is shown in figure 1, DC-DC is high voltage direct current.The input of DC-DC is high-voltage DC power supply, it is possible to be the output of charger, it is also possible to be the output of vehicle-mounted energy-storage battery.High voltage direct current is converted to low-voltage DC (12V) by charger internal auxiliary power supply transducer.Additionally auxiliary power circuit provides 5V, 3.3V power supply, is controlled by CAN signal INH, is specifically shown in Fig. 2.
The power supply (12V) of CAN chip both can come from charger accessory power supply, it is also possible to powers from outside 12V.CAN chip is connected with car load CAN network (mainly battery management system BMS and whole-control system VCU) by CANBUS.Power supply changeover device provides low-tension supply to CAN chip and digital control unit (DSP/MCU), is connected by pcb board cabling.It is joined directly together by pcb board cabling between CAN chip and DSP, mainly several signals line signals such as () CAN-H, CAN-L, STB, ENABLE, WEEKUP.CAN-H and CAN-L is the CAN communication holding wire between CAN chip and DSP.CAN chip can adopt TJA1043A family chip.CAN chip exports control signal to auxiliary power circuit, and this signal condition, by the impact of STB and other signals, uses the signals to control the power supply of accessory power supply, to reach system dormancy and the function waken up in this programme.
Power supply changeover device is followed by a secondary auxiliary power circuit, as shown in Figure 2, including: by a diode and external 12V DC source (accumulator), it is listed as CAN controller powers by the inside 12V accessory power supply that a diode is connected with power supply changeover device, external 12V DC source and internal 12V accessory power supply；CAN controller is powered to digital control unit by a transistor control circuit and a level shifting circuit.CAN chip one signal (INH) of output, is used for controlling accessory power supply and powers to dsp system.When other signal conditions are determined, when STB is high level, INH is also high signal, and accessory power supply provides power supply (5V/3.3V) to DSP/MCU minimum system, and system is in wake-up states；When STB is low level, INH is also low signal, and accessory power supply disconnects powers to DSP, thus reaching the function of system dormancy, to save power consumption.
In Fig. 2, external 12V DC source typically directly connects accumulator on electric automobile；The internal 12V accessory power supply of charger is converted by internal DC-DC；CAN chip power supply power supply may be from external 12V DC source or the internal 12V accessory power supply of charger.CAN chip output control signal INH, in order to control the power supply of DSP minimum system.When system needs dormancy time, this signal is low, cuts off the power supply of 12V power supply.When system needs to wake up, INH becomes high level, connects accessory power supply power supply circuits.Electrical level transferring chip for by 12V level conversion be DSP minimum system can 5V or 3.3V level.
After adopting technical solution of the present invention, when DSP is when carrying out the homing action during software upgrading, the STB pin of DSP side is high-impedance state, and its level state depends on external circuit.And external circuit can remain high level due to the existence of newly-increased drop-down electric capacity.Owing to the STB pin of now DSP and CAN chip is all high-impedance state, so this capacitive energy is bled off by off-load hardly, it can be ensured that DSP resets and upgrades successfully；When system needs dormancy, DSP by STB pin is dragged down (DSP inner ground), the energy abrupt release on drop-down electric capacity, STB pin level becomes low level, CAN chip detection after STB step-down by under system electricity.Under system after electricity, the STB pin of DSP is no longer controlled (being equivalent to unsettled), but because drop-down electric capacity does not have energy, so STB pin will stay in that low level, thus ensureing that system remains resting state.
CAN chip is not limited to use TJA1043 series, can use as long as having the CAN chip waking control function up.
Digit chip is not limited to DSP, as long as requiring over CAN communication to carry out software upgrading simultaneously need to realize digital control power-supply system and wake the chip of sleep mode up and can use (MCU including but not limited to DSP, the MICROCHIP of TI).
The technical scheme that the present invention proposes is not limited to be applied to onboard charger of electric car, and in other need to be provided simultaneously with software upgrading and wake communication power supply or the numerical control system of sleep mode up, this inventive technique is all effective.
Above-described embodiment is merely to illustrate the specific embodiment of the present invention.It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to make some deformation and change, these deformation and change all should belong to protection scope of the present invention.
Claims (6)
1. the digital power control system for charger, including power supply changeover device, secondary auxiliary power circuit, CAN controller and digital control unit, described digital control unit is connected with battery management system (BMS) or whole-control system (VCU) by CAN controller, described CAN controller controls a level auxiliary power circuit and powers to digital control unit, it is characterized in that: the control signal wire between described digital control unit with CAN controller is connected a drop-down electric capacity, this electric capacity one terminates control signal wire, other end ground connection.
2. digital power control system as claimed in claim 1, it is characterized in that: described secondary auxiliary power circuit includes: the external 12V DC source (accumulator) connected by a diode, it is listed as CAN controller powers by the inside 12V accessory power supply that a diode is connected with power supply changeover device, external 12V DC source and internal 12V accessory power supply；CAN controller is powered to digital control unit by a transistor control circuit and a level shifting circuit.
3. digital power control system as claimed in claim 1, it is characterised in that: described drop-down electric capacity is the small capacitances of 47pF.
4. digital power control system as claimed in claim 1, it is characterised in that: described CAN controller adopts TJA1043 series CAN chip.
5. digital power control system as claimed in claim 1, it is characterised in that: described digital control unit adopts DSP or MCU.
6. digital power control system as claimed in claim 1, it is characterised in that: described digital control unit has the function being realized digital display circuit on-line software updating and dormancy awakening by CAN communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095728.6A CN105730378B (en) | 2016-02-22 | 2016-02-22 | For the digital power control system of charger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610095728.6A CN105730378B (en) | 2016-02-22 | 2016-02-22 | For the digital power control system of charger |
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| CN105730378A true CN105730378A (en) | 2016-07-06 |
| CN105730378B CN105730378B (en) | 2018-06-22 |
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| CN201610095728.6A Active CN105730378B (en) | 2016-02-22 | 2016-02-22 | For the digital power control system of charger |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125628A (en) * | 2016-08-26 | 2016-11-16 | 东南（福建）汽车工业有限公司 | A kind of dual power supply input car body controller |
| CN113119733A (en) * | 2019-12-26 | 2021-07-16 | 北汽福田汽车股份有限公司 | Control method and device of vehicle-mounted charger, medium, vehicle-mounted charger and vehicle |
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| CN100487970C (en) * | 2003-12-18 | 2009-05-13 | 武汉理工大学 | Multilayer distributed battery managing system based on CAN bus |
| CN102255352A (en) * | 2011-05-26 | 2011-11-23 | 南昌大学 | Distributed intelligent power battery pack management system |
| JP2013223394A (en) * | 2012-04-19 | 2013-10-28 | Panasonic Corp | Stator of synchronous rotation machine and air-conditioning brushless dc fan motor |
| CN203645381U (en) * | 2013-12-13 | 2014-06-11 | 深圳市航盛电子股份有限公司 | Vehicle charger system of electric vehicle |
| CN105226735A (en) * | 2014-06-13 | 2016-01-06 | 国家电网公司 | A kind of alternating current-direct current compatible type Vehicular charger front stage circuits and Vehicular charger |
-
2016
- 2016-02-22 CN CN201610095728.6A patent/CN105730378B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100487970C (en) * | 2003-12-18 | 2009-05-13 | 武汉理工大学 | Multilayer distributed battery managing system based on CAN bus |
| CN102255352A (en) * | 2011-05-26 | 2011-11-23 | 南昌大学 | Distributed intelligent power battery pack management system |
| JP2013223394A (en) * | 2012-04-19 | 2013-10-28 | Panasonic Corp | Stator of synchronous rotation machine and air-conditioning brushless dc fan motor |
| CN203645381U (en) * | 2013-12-13 | 2014-06-11 | 深圳市航盛电子股份有限公司 | Vehicle charger system of electric vehicle |
| CN105226735A (en) * | 2014-06-13 | 2016-01-06 | 国家电网公司 | A kind of alternating current-direct current compatible type Vehicular charger front stage circuits and Vehicular charger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106125628A (en) * | 2016-08-26 | 2016-11-16 | 东南（福建）汽车工业有限公司 | A kind of dual power supply input car body controller |
| CN113119733A (en) * | 2019-12-26 | 2021-07-16 | 北汽福田汽车股份有限公司 | Control method and device of vehicle-mounted charger, medium, vehicle-mounted charger and vehicle |
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| CN105730378B (en) | 2018-06-22 |
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Address after: 518000, 5 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee after: Shenzhen Weimei New Energy Co., Ltd. Address before: 518000, 4 floor, Fengyun mansion, five road north, Nanshan District science and Technology Park, Shenzhen, Guangdong Patentee before: Shenzhen Vmax Power Co., Ltd. |