CN204538792U - A kind of parallel power supply system and power module - Google Patents
A kind of parallel power supply system and power module Download PDFInfo
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- CN204538792U CN204538792U CN201520251737.0U CN201520251737U CN204538792U CN 204538792 U CN204538792 U CN 204538792U CN 201520251737 U CN201520251737 U CN 201520251737U CN 204538792 U CN204538792 U CN 204538792U
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Abstract
The utility model relates to a kind of parallel power supply system and power module.Power-supply system comprises a power module or at least two power modules in parallel, each power module comprises battery pack, control device and flow-restriction, battery pack and flow-restriction are arranged in series, and control device sampling connects corresponding battery pack, control device connects corresponding flow-restriction.Each power module is all supporting is provided with a control device, is conducive to the control of each power module; This control device is for monitoring the state information of battery pack and fault message and monitoring the flow-restriction of corresponding battery pack, control device only controls corresponding battery pack, when this battery pack breaks down, only this battery pack and power-supply system need be disconnected, setting program in control device does not need to change, and controls comparatively easy and flexible.
Description
Technical field
The utility model relates to a kind of parallel power supply system and power module, belongs to application of power technical field.
Background technology
Along with the raising that the universal of the regenerative resource such as photovoltaic, wind energy and people realize, new forms of energy are widelyd popularize.The shortcomings such as traditional lead acid batteries is large with its volume, weight is large, seriously polluted and cycle life is short are replaced by emerging lithium electricity battery gradually, current communication power supply field gradually adopts 15-16 string ferric phosphate battery to replace lead-acid battery, forming 48V DC back-up power supply is that traffic load is powered, according to the difference of website, capacity 50Ah, 100Ah, 150Ah, 200Ah, 300Ah etc., consider adaptability and the flexibility of power module, to realize the parallel extended of module.Simultaneously home-use photovoltaic energy storage power supply is also in rise, adopts the 48V lithium of different capabilities electricity battery pack to carry out parallel connection, combine also/from net photovoltaic DC-to-AC converter, the demand of different home user can be met, thus the solution of formation family new forms of energy.Adopt 48V power module, be convenient to the versatility of product.
According to actual needs; usually multiple lithium power supply module parallel connection can be used; but owing to there is consistency difference between each power module; cause the existence having circulation between module; if circulation is excessive; individual module charging overcurrent or electric discharge overcurrent can be caused, and parallel module can not normally be worked.
Current lithium electricity parallel arrangement roughly has two kinds, and a kind of flow equalizing circuit that adopts realizes the parallel connection of lithium power supply module, and utilize this scheme flow equalizing circuit always in running order, efficiency is lower, and the reliability of system is reduced greatly; Also have a kind of master controller that adopts to control multiple parallel module simultaneously, such as application number is 201310232671.6,, denomination of invention is the Chinese patent application of " cell parallel balancing circuitry ", it discloses a kind of battery system, between just total bus and negative total bus, multiple battery pack is arranged in parallel, and each battery pack is in series with current balance circuit, a controller is set in whole system, the battery pack that this controller control connection is all and current balance circuit.When battery system in this application logs off there being battery pack to break down, need the program readjusting master controller according to the quantity of the parallel module redefined, and then the parallel connection realizing power module uses, this mode controls comparatively complicated, underaction, efficiency is lower, is unfavorable for the control of each power module.
Utility model content
The purpose of this utility model is to provide a kind of parallel power supply system, and control comparatively complicated problem in order to solve traditional power-supply system, meanwhile, the utility model also provides a kind of power module.
For achieving the above object, scheme of the present utility model comprises a kind of parallel power supply system, comprise and be connected to a power module between just total bus and negative total bus or at least two power modules be arranged in parallel, described each power module includes positive binding post and negative binding post, circuit between described positive binding post and negative binding post is serially connected with a battery pack, described each power module also includes a control device and flow-restriction, described battery pack and described flow-restriction are arranged in series, described control device sampling connects corresponding described battery pack, the described flow-restriction that control connection is corresponding.
Described control device is BMS.
Described just total bus or negative total bus are by circuit breaker connecting power line road.
Described circuit breaker is supporting is provided with an emergency stop device controlling described circuit breaker and disconnect, and described emergency stop device comprises scram button, and described scram button string is located in the control loop of described circuit breaker.
Described battery pack is in series by several cells, and the number of the cell in each battery pack is identical.
Described battery pack is lithium battery group.
A kind of power module, comprise positive binding post and negative binding post, circuit between described positive binding post and negative binding post is serially connected with a battery pack, described power module also comprises a control device and flow-restriction, described battery pack and described flow-restriction are arranged in series, the described flow-restriction that the described battery pack of described control device sampling connection correspondence, control connection are corresponding.
Described control device is BMS.
The series circuit of described battery pack is provided with hand switch.
Described battery pack is lithium battery group.
Each power module is all supporting is provided with a control device, this control device is only used for controlling corresponding battery pack, for monitoring state information and the fault message of corresponding battery pack, do not need to control other battery pack, be conducive to controling effectively to each power module, avoid the problem of the control inconvenience that whole power-supply system only has a control device to bring, and, when certain power module breaks down, only this power module need be logged off, other power module is unaffected, control device in other power modules still controls corresponding battery pack, setting program wherein does not need to change, control comparatively easy and flexible.
Accompanying drawing explanation
Fig. 1 is the structural representation of parallel power supply system embodiment;
Fig. 2 is the control strategy flow chart of parallel power supply system embodiment;
Fig. 3 is the structural representation of power module embodiment.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in more detail.
The embodiment of parallel power supply system
Lithium electricity power-supply system in parallel as shown in Figure 1, comprise at least two the lithium power supply modules 1 be arranged in parallel be connected between just total bus and negative total bus, each lithium power supply module all has positive pole forceful electric power binding post 5 and negative pole forceful electric power binding post 6, a Li-ion batteries piles 2 is connected in series between positive pole forceful electric power binding post 5 and negative pole forceful electric power binding post 6, each Li-ion batteries piles 2 is composed in series by several cells, the number of the cell of connecting in the battery pack in each power module is identical, but capacity can be different.The number of the cell of connecting in battery pack sets as the case may be, and generally, each Li-ion batteries piles is made up of 15 or 16 string Large Copacity (capacity of each cell is more than or equal to 10Ah) monomer lithium ion batteries.
Each lithium power supply module 1 is all supporting is provided with battery management system (BMS) mainboard 3, and the sampling of battery management system (BMS) mainboard 3 connects corresponding lithium electricity battery pack 2.Battery management system monitors state information and the fault message of the cell in corresponding battery pack in real time, and wherein state information comprises voltage, electric current, SOC and SOH of battery pack, the voltage of cell and temperature; Fault message comprises too high and too low alarm of the overvoltage of battery pack and undervoltage alarm and protection, high temperature and low-temperature warning and protection, overcurrent alarm and protection, short circuit alarm and protection, reversal connection alarm and protection, SOC capacity etc.Battery management system is monitored battery pack and is reached display interface plate or display shows (not drawing in Fig. 1) by monitoring the information that obtains, display interface plate or display screen include capacity indicator light, run indicator and alarm indicator, indicating status information and fault message; Meanwhile, display interface plate or display include the communication interfaces such as RS232, RS485 or CAN, in parallel and communicate with host computer and use for communication between module.
Each lithium power supply module 1 inside is provided with a current-limiting circuit plate 4, and current-limiting circuit plate 4 is connected with corresponding battery pack, the current-limiting circuit plate 4 that battery management system mainboard 3 control connection is corresponding.Battery management system mainboard controls current-limiting circuit plate 4 according to the operating current size of the power module of correspondence and opens or close, when the charging current value of lithium power supply module 1 is greater than setting overcurrent value, current-limiting circuit plate 4 is opened, the charging current of lithium power supply module is limited, the situation that corresponding power module can not overcharge; When the charging current value of lithium power supply module 1 is less than another setting current value, charging current limiter function is closed, and now this power module enters normal operating conditions.
The series circuit of each power module inside, battery pack is provided with hand switch 7, for when this power module breaks down or other things occur, can in time this power module and other equipment be disconnected.When multiple power module is in parallel, the positive terminal of all power modules is connected on main positive copper bar 8, the negative terminal of all power modules is connected on main negative copper bar 9.Then, main positive copper bar 8 is connected on load end P+ copper bar 14, main negative copper bar 9 is connected on load end P-copper bar 13, line between load end copper bar and main positive and negative copper bar is serially connected with circuit breaker 10, in order to disconnect this power-supply system at any time, access an emergency stop device, device comprises a breaker control circuit, this control loop is the loop be connected in series by scram button SB11, DCDC power module 12 and relay coil 15, scram button SB11, in case of emergency pressing when power-supply system, can carry out emergent stopping operation.Relay coil 15 obtains electric circuit breaker 10 corresponding to dead electricity and disconnects and close.Such as, when needs emergent stopping power-supply system works, press scram button SB11, relay coil 15 obtains electric, and circuit breaker 10 disconnects, and realizes the emergent stopping operation of power-supply system.As other embodiment, also can not arrange emergency stop device, circuit breaker carries out auto-cutout according to line conditions.
As shown in Figure 2, it is the control strategy flow chart of lithium electricity power-supply system.
First battery management system (BMS) judges that power module is in charged state or discharge condition:
If lithium power supply module is in charged state, then whether the charging current of judge module is greater than overcharge overcurrent threshold and the time of trickle charge is greater than 1min, if, then open charging current limiter circuit, charge closing current-limiting circuit after 1min, again judge charging current and charging overcurrent threshold size, if be still greater than charging overcurrent threshold, then continue the above step of circulation; If the charging current of module is greater than overcharge overcurrent threshold and the time of trickle charge is less than 1min or charging current is less than charging overcurrent threshold, then charging current limiter function is without the need to opening, and wired in parallel normally runs.
If lithium power supply module is in discharge condition, then the discharging current of judge module whether be greater than electric discharge overcurrent threshold and the time of continuous discharge be greater than 1min, if, then cut off discharge loop, electric discharge is interrupted, closed discharge loop after 1min, electric discharge proceeds, the discharging current of judge module and electric discharge overcurrent threshold size, if discharging current is still greater than electric discharge overcurrent threshold 1min, then continue the above step of circulation again; If the discharging current of module is greater than electric discharge overcurrent threshold value and the time of continuous discharge is less than 1min or discharging current is less than electric discharge overcurrent threshold, then lithium power supply module is in parallel normally runs.
If the lithium power supply module of parallel connection neither charges, also do not discharge, between them, there is no circulation, then normally run after wired in parallel, and charging current limiter function is not opened.
For lithium battery in above-described embodiment, as other execution mode, also can be made up of other forms of battery in power-supply system, and, also only can comprise a power module in power-supply system.
In above-described embodiment, power module comprises a battery pack, as other execution mode, can comprise multiple battery pack in each power module, and these battery pack can carry out connection in series-parallel connection according to concrete condition.
Power module embodiment
Lithium power supply module as shown in Figure 3, there are positive pole forceful electric power binding post 5 and negative pole forceful electric power binding post 6, a Li-ion batteries piles 2 is connected in series between positive pole forceful electric power binding post 5 and negative pole forceful electric power binding post 6, this Li-ion batteries piles is composed in series by several cells, the number of the cell of connecting in battery pack is identical, but capacity can be different.In battery pack 2, the number of the cell of series connection sets as the case may be, and generally, Li-ion batteries piles is made up of 15 or 16 string Large Copacity (capacity of each cell is more than or equal to 10Ah) monomer lithium ion batteries.
Supportingly in lithium power supply module be provided with battery management system (BMS) mainboard 3, the sampling of battery management system (BMS) mainboard 3 connects lithium electricity battery pack 2.The state information of the cell in the real-time monitoring battery group of battery management system (BMS) mainboard 3 and fault message, wherein state information comprises voltage, electric current, SOC and SOH of battery pack, the voltage of cell and temperature; Fault message comprises too high and too low alarm of the overvoltage of battery pack and undervoltage alarm and protection, high temperature and low-temperature warning and protection, overcurrent alarm and protection, short circuit alarm and protection, reversal connection alarm and protection, SOC capacity etc.Battery management system (BMS) mainboard 3 pairs of battery pack 2 are monitored and are reached display interface plate or display 16 shows by monitoring the information that obtains, display interface plate or display screen 16 include capacity indicator light, run indicator and alarm indicator, indicating status information and fault message; Meanwhile, display interface plate or display 16 include the communication interfaces such as RS232, RS485 or CAN, use for communicating with host computer.
Lithium power supply module inside is provided with a current-limiting circuit plate 4, and current-limiting circuit plate 4 is connected with battery pack 2, battery management system (BMS) mainboard 3 control connection current-limiting circuit plate 4.Battery management system (BMS) mainboard 3 controls current-limiting circuit plate 4 according to the operating current size of power module and opens or close, when the charging current value of lithium power supply module is greater than setting overcurrent value, current-limiting circuit plate is opened, the charging current of lithium power supply module is limited, the situation that corresponding power module can not overcharge; When the charging current value of lithium power supply module is less than another setting current value, charging current limiter function is closed, and now this power module enters normal operating conditions.
The series circuit of power module inside, battery pack is provided with hand switch 7, during for breaking down at power module or other things occurring, can in time this power module and other equipment be disconnected.
For lithium battery in above-described embodiment, as other execution mode, also can be made up of the battery of other kinds or model in power-supply system.
In above-described embodiment, power module comprises a battery pack, as other execution mode, can comprise multiple battery pack in power module, and these battery pack can carry out connection in series-parallel connection according to concrete condition.
Be presented above concrete execution mode, but the utility model is not limited to described execution mode.The equivalents of carrying out the parallel power supply system in execution mode and the individual part in power module when not departing from principle of the present utility model and spirit or change still fall in protection range of the present utility model.
Claims (10)
1. a parallel power supply system, comprise and be connected to a power module between just total bus and negative total bus or at least two power modules be arranged in parallel, described each power module includes positive binding post and negative binding post, circuit between described positive binding post and negative binding post is serially connected with a battery pack, it is characterized in that, described each power module also includes a control device and flow-restriction, described battery pack and described flow-restriction are arranged in series, described control device sampling connects corresponding described battery pack, the described flow-restriction that control connection is corresponding.
2. parallel power supply system according to claim 1, is characterized in that, described control device is BMS.
3. parallel power supply system according to claim 1 and 2, is characterized in that, described just total bus or negative total bus are by circuit breaker connecting power line road.
4. parallel power supply system according to claim 3, it is characterized in that, described circuit breaker is supporting is provided with an emergency stop device controlling described circuit breaker and disconnect, and described emergency stop device comprises scram button, and described scram button string is located in the control loop of described circuit breaker.
5. parallel power supply system according to claim 1, is characterized in that, described battery pack is in series by several cells, and the number of the cell in each battery pack is identical.
6. parallel power supply system according to claim 1, is characterized in that, described battery pack is lithium battery group.
7. a power module, comprise positive binding post and negative binding post, circuit between described positive binding post and negative binding post is serially connected with a battery pack, it is characterized in that, described power module also comprises a control device and flow-restriction, described battery pack and described flow-restriction are arranged in series, the described flow-restriction that the described battery pack of described control device sampling connection correspondence, control connection are corresponding.
8. power module according to claim 7, is characterized in that, described control device is BMS.
9. the power module according to claim 7 or 8, is characterized in that, the series circuit of described battery pack is provided with hand switch.
10. the power module according to claim 7 or 8, is characterized in that, described battery pack is lithium battery group.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520251737.0U CN204538792U (en) | 2015-04-23 | 2015-04-23 | A kind of parallel power supply system and power module |
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| CN201520251737.0U CN204538792U (en) | 2015-04-23 | 2015-04-23 | A kind of parallel power supply system and power module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365659A (en) * | 2018-03-23 | 2018-08-03 | 中航锂电（洛阳）有限公司 | A kind of battery module parallel connection tooling and a kind of battery module parallel system |
| CN110401257A (en) * | 2019-07-26 | 2019-11-01 | 唐山鼎石汽车制造有限公司 | Double branch power control systems of electric loader |
| WO2023040642A1 (en) * | 2021-09-16 | 2023-03-23 | 远景能源有限公司 | Energy storage system and management method |
-
2015
- 2015-04-23 CN CN201520251737.0U patent/CN204538792U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108365659A (en) * | 2018-03-23 | 2018-08-03 | 中航锂电（洛阳）有限公司 | A kind of battery module parallel connection tooling and a kind of battery module parallel system |
| CN110401257A (en) * | 2019-07-26 | 2019-11-01 | 唐山鼎石汽车制造有限公司 | Double branch power control systems of electric loader |
| WO2023040642A1 (en) * | 2021-09-16 | 2023-03-23 | 远景能源有限公司 | Energy storage system and management method |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211228 Address after: No.1 Jiangdong Avenue, Jintan District, Changzhou City, Jiangsu Province Patentee after: Zhongchuangxin Aviation Technology Co.,Ltd. Address before: No.66, Binhe North Road, high tech Development Zone, Luoyang City, Henan Province Patentee before: CHINA AVIATION LITHIUM BATTERY Co.,Ltd. |
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| TR01 | Transfer of patent right |