CN111786451A - Multi-path power supply system for battery management system - Google Patents
Multi-path power supply system for battery management system Download PDFInfo
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- CN111786451A CN111786451A CN202010574038.5A CN202010574038A CN111786451A CN 111786451 A CN111786451 A CN 111786451A CN 202010574038 A CN202010574038 A CN 202010574038A CN 111786451 A CN111786451 A CN 111786451A
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- supply module
- ups
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 63
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 63
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 40
- 230000009466 transformation Effects 0.000 claims abstract description 17
- 230000009467 reduction Effects 0.000 claims abstract description 7
- 230000001133 acceleration Effects 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 2
- 229910044991 metal oxide Inorganic materials 0.000 claims 1
- 150000004706 metal oxides Chemical class 0.000 claims 1
- 239000004065 semiconductor Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 7
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 230000002035 prolonged effect Effects 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
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Classifications
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- 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
- H02J7/34—Parallel operation in networks using both storage and other DC sources, e.g. providing buffering
- H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
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- 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
- H02J7/02—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from AC mains by converters
- H02J7/04—Regulation of charging current or voltage
- H02J7/06—Regulation of charging current or voltage using discharge tubes or semiconductor devices
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- 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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
- H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
- H02M7/02—Conversion of AC power input into DC power output without possibility of reversal
- H02M7/04—Conversion of AC power input into DC power output without possibility of reversal by static converters
- H02M7/06—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
- H02M7/064—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode with several outputs
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
The invention provides a multi-path power supply system for a battery management system, which comprises: the dry battery power supply module is characterized in that a plurality of dry batteries are connected in series and parallel and then connected to the DC/DC voltage stabilizing unit to realize BMS power supply; the mains supply module is used for supplying power to the BMS through the rectifying unit and the voltage stabilizing unit after the mains supply is subjected to voltage reduction through the transformer; the UPS power supply module comprises a UPS power supply input unit, a PWM control unit, a voltage transformation unit and a rectification voltage stabilizing circuit, and is used for supplying power to the BMS; and the direct current is connected to the PWM control unit of the UPS power supply module through the switch and the anti-reverse diode, and then the power supply for the BMS is realized through the power supply loop of the UPS power supply module. The invention provides a multi-path power supply system for a battery management system of a lithium battery in an uninterruptible power supply, can realize four-path power supply and enhances the stability of the system.
Description
Technical Field
The present invention relates to a power supply system, and more particularly, to a multi-path power supply system for a battery management system.
Background
In the fields of industrial manufacturing and informatization, the continuous and stable operation of a power supply system matched with equipment is a premise for ensuring the normal operation of the equipment. Among them, ups (unified Power supply), which is an uninterruptible Power supply, is a device that provides "backup Power" for important devices. When the mains supply is not powered off, the unstable mains supply can provide stable power supply for equipment after being converted by the UPS; when the commercial power is disconnected, the UPS is seamlessly switched from the commercial power mode to the battery mode, the direct current output by the battery is inverted into alternating current to supply power to the equipment, the whole process aims at ensuring that the equipment is not powered off, sufficient response time is reserved, and an operator is allowed to stop working procedures to save work such as data. However, in the prior art, the lithium battery power supply mode of the uninterruptible power supply is too single, and the power supply loop has less selectivity.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a multi-path power supply system which can provide four power supply loops and further realize multi-path power supply for a battery management system corresponding to a lithium battery of an uninterruptible power supply.
To this end, the present invention provides a multi-path power supply system for a battery management system, including:
the dry battery power supply module is characterized in that a plurality of dry batteries are connected in series and in parallel and then are connected to the DC/DC voltage stabilizing unit through a switch to realize power supply for the BMS;
the commercial power supply module is used for supplying power to the BMS through the anti-reverse diode after the commercial power is subjected to voltage reduction through the transformer and then passes through the rectifying unit and the voltage stabilizing unit;
the UPS power supply module comprises a UPS power supply input unit, a PWM control unit, a voltage transformation unit, an anti-reverse diode and a rectification voltage stabilizing circuit, wherein the UPS power supply input unit provides direct current charging voltage, the direct current charging voltage is input to the PWM control unit to modulate charging current, then voltage reduction is realized through the voltage transformation unit, and power supply for the BMS is realized after the direct current charging voltage is connected to the rectification voltage stabilizing circuit through the anti-reverse diode;
and the direct current of the lithium battery power supply module is connected to the PWM control unit of the UPS power supply module through a switch and an anti-reverse diode, and then the power supply for the BMS is realized through the power supply loop of the UPS power supply module.
The further improvement of the invention is that when the lithium battery of the lithium battery power supply module is sufficient in electric quantity, the BMS is powered by the lithium battery, and the BMS is started; when the commercial power is disconnected, the lithium battery power supply module supplies power to the UPS of the UPS power supply module until the lithium battery discharges to an empty power state, and the UPS is shut down; when the mains supply is connected, the BMS is powered through the mains supply module, and the BMS is started; when the electric quantity of the lithium battery is too low, the mains supply is connected but unstable, the BMS cannot be started, and the UPS cannot normally supply power to the BMS through the UPS power supply module after the UPS is started, the BMS is started through the dry battery power supply module, after the start, the main loop relay is closed and is in communication connection with the UPS power supply module, and the lithium battery of the lithium battery power supply module is charged through the UPS power supply module; when the BMS is started and the lithium battery power supply module normally operates, the BMS starts to be powered by the lithium battery of the lithium battery power supply module or the commercial power.
The invention has the further improvement that when the electric quantity of the lithium battery power supply module is too low, if the mains supply is switched on but the mains supply is unstable and the BMS cannot be started, whether the UPS power supply module can normally supply power is judged, if so, the lithium battery of the lithium battery power supply module is charged through the UPS power supply module, and the UPS power supply input unit supplies power to the BMS to start the BMS.
The invention is further improved in that the PWM control unit includes a switch start circuit, a switch power supply circuit, a MOS transistor switch control circuit, and an RCD absorption circuit, the UPS power supply input unit is connected to the switch power supply circuit through the switch start circuit, the switch power supply circuit is connected to the voltage transformation unit through the MOS transistor switch control circuit, and the MOS transistor switch control circuit is further connected to the RCD absorption circuit.
The further improvement of the present invention is that the PWM control unit further comprises a switching power supply compensation circuit, and the switching power supply compensation circuit is connected to the reference terminal and the compensation terminal of the switching power supply circuit, respectively.
The further improvement of the invention is that the PWM control unit further comprises a switching acceleration circuit, and the switching acceleration circuit is respectively connected to the switching power supply circuit and the MOS transistor switching control circuit.
The further improvement of the invention is that the PWM control unit further comprises a control protection circuit, and the control protection circuit is respectively connected with the MOS tube switch control circuit and the voltage transformation unit.
The invention is further improved in that the rectifying and voltage stabilizing circuit comprises an anti-reverse diode circuit, a first rectifying and voltage stabilizing unit, a second rectifying and voltage stabilizing unit and a third rectifying and voltage stabilizing unit, wherein the first rectifying and voltage stabilizing unit, the second rectifying and voltage stabilizing unit and the third rectifying and voltage stabilizing unit are respectively connected to different taps of a transformer in the voltage transformation unit through the anti-reverse diode circuit.
A further development of the invention is that the UPS supply input unit is connected in series via a charging output interface to a fuse, which is connected to the switch activation circuit via an anti-reverse diode.
In the commercial power supply module, commercial power is directly supplied to the BMS after being subjected to voltage transformation, rectification and stabilization. .
Compared with the prior art, the invention has the beneficial effects that: the system comprises a battery management module, a battery power supply module, a UPS power supply module, a lithium battery power supply module, a battery management module and a battery management module, wherein the battery management system is used for managing the battery of the battery; on the basis, the utilization rate of the electric energy of the dry battery is improved, the service time of the dry battery is prolonged, and frequent maintenance is avoided through optimization of a control mode; can also start BMS when the low unable BMS power supply of lithium cell electric quantity starts to open major loop relay, supply power for the lithium cell of low electric quantity, prevent that the lithium cell from being in the empty electricity state for a long time, influencing battery life.
Drawings
FIG. 1 is a schematic circuit diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a power supply startup circuit according to an embodiment of the invention;
fig. 3 is a schematic circuit diagram of a dry cell power module according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a mains supply module according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a UPS power supply module and a lithium battery power supply module according to an embodiment of the invention;
FIG. 6 is a schematic circuit diagram of a PWM control unit according to an embodiment of the present invention;
FIG. 7 is a schematic circuit diagram of a rectifying voltage regulator circuit according to one embodiment of the present invention.
Detailed Description
Preferred embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
As shown in fig. 1 to 7, the present example provides a multi-path power supply system for a battery management system, including:
the dry battery power supply module 1 is characterized in that a plurality of dry batteries are connected in series and in parallel and then are connected to a DC/DC voltage stabilizing unit through a switch to realize power supply for the BMS;
the mains supply power supply module 2 is used for supplying power to the BMS through the anti-reverse diode after the mains supply is subjected to voltage reduction through the transformer and then passes through the rectifying unit and the voltage stabilizing unit;
the UPS power supply module 3 comprises a UPS power supply input unit 301, a PWM control unit 302, a voltage transformation unit 303, an anti-reverse diode and a rectification voltage stabilizing circuit 304, wherein the UPS power supply input unit 301 provides a direct current charging voltage, the direct current charging voltage is input to the PWM control unit 302 to modulate charging current, then voltage reduction is realized through the voltage transformation unit 303, and power supply for the BMS is realized after the direct current charging voltage is connected to the rectification voltage stabilizing circuit 304 through the anti-reverse diode;
and the direct current of the lithium battery power supply module 4 is connected to the PWM control unit 302 of the UPS power supply module 3 through a switch and an anti-reverse diode, and then the power supply for the BMS is realized through the power supply loop of the UPS power supply module 3.
The BMS referred to in this example is a Battery Management System; as shown in fig. 3, the dry battery power supply module 1 selectively matches long-life dry batteries according to the power supply power, and a plurality of dry batteries are connected in series and in parallel to serve as an electric energy source. In actual operation, the switch is turned on, and the BMS is powered through the DC/DC voltage stabilizing chip to start the BMS. An anti-reverse diode is connected in series in a loop where the dry battery power supply module 1 is located, and the function of preventing reverse voltage is achieved.
That is, the DC/DC voltage stabilization unit in the dry battery power supply module 1 is preferably implemented by a voltage stabilization chip, and when the switch is turned on, the 5V dry battery voltage is stabilized and boosted to 12V by the voltage stabilization chip, and then a stable power supply voltage is provided to start the BMS.
As shown in fig. 4, in the utility power supply module 2 of this embodiment, after the 220V utility power is stepped down to 13 to 15Vac by the transformer, the utility power is rectified and stabilized, the rectification in the utility power supply module 2 is preferably realized by the rectifier bridge, and then the BMS is powered by the anti-reverse diode to start the BMS.
As shown in fig. 5 to 7, the power supply loop of the UPS power supply module 3 according to this embodiment provides a dc charging voltage, modulates a charging current using PWM control, steps down the charging current using a transformer, and supplies power to the BMS after rectification and voltage stabilization through an anti-reverse diode to realize start-up of the BMS.
In fig. 5, a lithium battery power supply input unit 401 of the lithium battery power supply module 4 draws power supply voltage from the positive electrode and the negative electrode of the lithium battery pack, and a fuse is connected in series in a loop for protection; the UPS power supply input unit 301 is connected to a charging output interface of a UPS, and a fuse is connected in series in a loop for protection, that is, the UPS power supply input unit 301 is connected in series to the fuse through the charging output interface, and the fuse is connected to the switch starting circuit 3021 through an anti-reverse diode, so that protection of UPS power supply is facilitated; the PWM control unit 302 controls the MOS transistor to open and close, so that the dc loop is continuously opened and closed, and a varying PWM voltage waveform is generated; the voltage transformation unit 303 reduces the voltage through a transformer, and different taps have different voltage outputs; in the rectification voltage stabilizing circuit 304, an anti-reverse diode is connected in series behind a transformer tap, a circuit at the rear end of the diode rectifies PWM current and converts the PWM current into direct current, and then voltage stabilization is performed through a voltage stabilizing chip to supply power to the BMS so as to start the BMS.
As shown in fig. 5 to 7, the PWM control unit 302 of the present embodiment preferably includes a switch start circuit 3021, a switching power supply circuit 3022, a MOS transistor switch control circuit 3023, and an RCD snubber circuit 3024, the UPS power supply input unit 301 is connected to the switching power supply circuit 3022 through the switch start circuit 3021, the switching power supply circuit 3022 is connected to the voltage transformation unit 303 through the MOS transistor switch control circuit 3023, and the MOS transistor switch control circuit 3023 is further connected to the RCD snubber circuit 3024. The switch starting circuit 3021 is used for realizing the switch starting, the switch power supply circuit 3022 realizes the switch power supply through the switch power supply chip, the MOS transistor switch control circuit 3023 controls the break-make of the return circuit through the MOS transistor, and the RCD absorption circuit 3024 is used for realizing the control of voltage, so as to enhance the stability of the product.
Preferably, as shown in fig. 5 and fig. 6, the PWM control unit 302 in this embodiment further preferably includes a switching power supply compensation circuit 3025, a switching acceleration circuit 3026 and a control protection circuit 3027, where the switching power supply compensation circuit 3025 is connected to the reference terminal and the compensation terminal of the switching power supply circuit 3022, respectively, that is, connected to the reference pin and the compensation pin of the switching power supply chip, and is used to implement control and compensation of the switching power supply and ensure stability of system operation; the switch accelerating circuit 3026 is respectively connected to the switch power supply circuit 3022 and the MOS transistor switch control circuit 3023, and is configured to implement preprocessing of switch control in the circuit, promote speed of switch control, and improve working efficiency and circuit response speed; the control protection circuit 3027 is connected to the MOS transistor switch control circuit 3023 and the voltage transformation unit 303, respectively, and is configured to implement circuit protection and prolong the service life of the product.
It should be noted that the circuit design of the switching power supply compensation circuit 3025, the switching acceleration circuit 3026, the control protection circuit 3027, and the like of this example is not a conventional circuit in the prior art, but is designed for the application environment of this example, and therefore, the response speed of the circuit can be effectively increased, the system stability can be improved, and the service life of the product can be prolonged.
As shown in fig. 5 and fig. 7, the rectifying and voltage stabilizing circuit 304 in this embodiment includes an anti-reverse diode circuit 3041, a first rectifying and voltage stabilizing unit 3042, a second rectifying and voltage stabilizing unit 3043, and a third rectifying and voltage stabilizing unit 3044, where the first rectifying and voltage stabilizing unit 3042, the second rectifying and voltage stabilizing unit 3043, and the third rectifying and voltage stabilizing unit 3044 are respectively connected to different taps of the transformer in the transforming unit 303 through the anti-reverse diode circuit 3041.
As can be seen from fig. 7, the rectifying and voltage stabilizing circuit 304 of the present embodiment can output different voltages, such as 5V and 12V, and can well meet the requirements of different voltage outputs through different taps of the transformer.
As shown in fig. 2, in this embodiment, when the lithium battery of the lithium battery power supply module 4 has sufficient electric quantity, the lithium battery supplies power to the BMS to start the BMS; when the mains supply is disconnected, the lithium battery power supply module 4 supplies power to the UPS power supply module 3, the UPS is in a battery mode with a load, and the UPS is shut down until the lithium battery discharges to an empty state; when the mains supply is switched on again, the BMS is powered through the mains supply module 2, and the BMS is started; when the electric quantity of the lithium battery is too low, the mains supply is switched on but is unstable, the BMS cannot be started, and the UPS cannot normally supply power to the BMS through the UPS power supply module 3 after the UPS is started, the BMS is started through the dry battery power supply module 1, after the start, the main loop relay is closed and is in communication connection with the UPS power supply module 3, and the lithium battery of the lithium battery power supply module 4 is charged through the UPS power supply module 3; when the BMS is started and the lithium battery power supply module 4 normally operates, the BMS starts to be supplied with power by the lithium battery of the lithium battery power supply module 4 or the commercial power.
That is, the present embodiment preferably uses a lithium battery to realize power supply, and if the commercial power is turned off and the battery power is discharged, the commercial power is waited to be switched on, and the commercial power supply module 2 supplies power to the BMS; after the commercial power is switched on, whether the commercial power is stable or not is judged, if the commercial power is stably supplied, if the commercial power is unstable, the commercial power is supplied through the UPS power supply module 3, and if the UPS power supply module 3 cannot be started, the dry battery power supply module 1 is adopted to start the BMS.
It should be noted that, in this embodiment, when the electric quantity of the lithium battery power supply module 4 is too low, if the commercial power is switched on, but the commercial power is unstable and the BMS cannot be started, it is determined whether the UPS power supply module 3 can normally supply power, if so, the lithium battery of the lithium battery power supply module 4 is charged through the UPS power supply module 3, and the UPS power supply input unit 301 supplies power to the BMS to start the BMS; furthermore, on the basis of ensuring power supply, the problems of low battery capacity (over discharge) and the like can be effectively prevented.
In the utility power supply module 2, after rectification, utility power is directly mounted on the PWM control unit 302 of the UPS power supply module 3, so that the utility power supply module 2, the UPS power supply module 3 and the lithium battery power supply module 4 all adopt a common PWM control loop to save circuit cost.
In summary, the present embodiment provides a multi-path power supply system for a battery management system of a lithium battery in an uninterruptible power supply, and can realize four-path power supply through the dry battery power supply module 1, the utility power supply module 2, the UPS power supply module 3, and the lithium battery power supply module 4, and supply power to the BMS to start the BMS; on the basis, through optimization of a control mode, the self-consumption of the dry battery power supply module 1 is effectively reduced, the utilization rate of the electric energy of the dry battery is improved, the service time of the dry battery is prolonged, and frequent maintenance is avoided; can also start BMS when the low unable BMS power supply of lithium cell electric quantity starts to open major loop relay, supply power for the lithium cell of low electric quantity, prevent that the lithium cell from being in the empty electricity state for a long time, influencing battery life.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (10)
1. A multi-channel power supply system for a battery management system, comprising:
the dry battery power supply module is characterized in that a plurality of dry batteries are connected in series and in parallel and then are connected to the DC/DC voltage stabilizing unit through a switch to realize power supply for the BMS;
the commercial power supply module is used for supplying power to the BMS through the anti-reverse diode after the commercial power is subjected to voltage reduction through the transformer and then passes through the rectifying unit and the voltage stabilizing unit;
the UPS power supply module comprises a UPS power supply input unit, a PWM control unit, a voltage transformation unit, an anti-reverse diode and a rectification voltage stabilizing circuit, wherein the UPS power supply input unit provides direct current charging voltage, the direct current charging voltage is input to the PWM control unit to modulate charging current, then voltage reduction is realized through the voltage transformation unit, and power supply for the BMS is realized after the direct current charging voltage is connected to the rectification voltage stabilizing circuit through the anti-reverse diode;
and the direct current of the lithium battery power supply module is connected to the PWM control unit of the UPS power supply module through a switch and an anti-reverse diode, and then the power supply for the BMS is realized through the power supply loop of the UPS power supply module.
2. The multi-power supply system for the battery management system according to claim 1, wherein when the lithium battery of the lithium battery power supply module is sufficient, the lithium battery supplies power to the BMS to start the BMS; when the commercial power is disconnected, the lithium battery power supply module supplies power to the UPS of the UPS power supply module until the lithium battery discharges to an empty power state, and the UPS is shut down; when the mains supply is connected, the BMS is powered through the mains supply module, and the BMS is started; when the electric quantity of the lithium battery is too low, the mains supply is connected but unstable, the BMS cannot be started, and the UPS cannot normally supply power to the BMS through the UPS power supply module after the UPS is started, the BMS is started through the dry battery power supply module, after the start, the main loop relay is closed and is in communication connection with the UPS power supply module, and the lithium battery of the lithium battery power supply module is charged through the UPS power supply module; when the BMS is started and the lithium battery power supply module normally operates, the BMS starts to be powered by the lithium battery of the lithium battery power supply module or the commercial power.
3. The multi-power supply system for the battery management system according to claim 2, wherein when the amount of electricity of the lithium battery power supply module is too low, if the commercial power is turned on but the commercial power is unstable and the BMS cannot be started, it is determined whether the UPS power supply module can normally supply power, if so, the lithium battery of the lithium battery power supply module is charged by the UPS power supply module, and the UPS power supply input unit supplies power to the BMS to start the BMS.
4. The multi-power supply system for the battery management system according to any one of claims 1 to 3, wherein the PWM control unit comprises a switch start circuit, a switch power supply circuit, a MOS (metal oxide semiconductor) tube switch control circuit and an RCD absorption circuit, the UPS power supply input unit is connected to the switch power supply circuit through the switch start circuit, the switch power supply circuit is connected to the voltage transformation unit through the MOS tube switch control circuit, and the MOS tube switch control circuit is further connected to the RCD absorption circuit.
5. The multi-channel power supply system for the battery management system according to claim 4, wherein the PWM control unit further comprises a switching power supply compensation circuit, and the switching power supply compensation circuit is respectively connected with the reference terminal and the compensation terminal of the switching power supply circuit.
6. The multi-channel power supply system for the battery management system according to claim 4, wherein the PWM control unit further comprises a switching acceleration circuit, and the switching acceleration circuit is respectively connected with the switching power supply circuit and the MOS tube switching control circuit.
7. The multi-channel power supply system for the battery management system according to claim 4, wherein the PWM control unit further comprises a control protection circuit, and the control protection circuit is respectively connected with the MOS transistor switch control circuit and the voltage transformation unit.
8. The multi-power supply system for the battery management system according to any one of claims 1 to 3, wherein the rectifying and voltage stabilizing circuit comprises an anti-reverse diode circuit, a first rectifying and voltage stabilizing unit, a second rectifying and voltage stabilizing unit and a third rectifying and voltage stabilizing unit, and the first rectifying and voltage stabilizing unit, the second rectifying and voltage stabilizing unit and the third rectifying and voltage stabilizing unit are respectively connected to different taps of a transformer in the transformation unit through the anti-reverse diode circuit.
9. The multi-power supply system for battery management system according to claim 4, wherein the UPS power supply input unit is connected in series to a fuse through a charging output interface, the fuse being connected to the switch activation circuit through an anti-reverse diode.
10. The multi-power supply system for the battery management system according to any one of claims 1 to 3, wherein in the commercial power supply module, commercial power is directly supplied to the BMS after being transformed, rectified and stabilized.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116154903A (en) * | 2023-02-06 | 2023-05-23 | 深圳拓邦股份有限公司 | Battery management system and battery pack |
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2020
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| US20040017110A1 (en) * | 2002-07-24 | 2004-01-29 | Yim Mau Shin Frank | Uninterruptible switching power supply device and method for uninterruptibly switching voltage |
| CN104426377A (en) * | 2013-09-03 | 2015-03-18 | 聚龙股份有限公司 | Wide-input voltage flyback-type switch power supply applicable to drive of direct-current motor |
| US20160190865A1 (en) * | 2014-12-29 | 2016-06-30 | Lg Cns Co., Ltd. | Switchable uninterruptible power supply system and battery charging method thereof |
| TWI668940B (en) * | 2018-05-24 | 2019-08-11 | 國立彰化師範大學 | Mobile solar energy storage device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116154903A (en) * | 2023-02-06 | 2023-05-23 | 深圳拓邦股份有限公司 | Battery management system and battery pack |
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| CN111786451B (en) | 2024-08-02 |
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