CN204597550U - A kind of battery pack with stand-by unit - Google Patents

A kind of battery pack with stand-by unit Download PDF

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Publication number
CN204597550U
CN204597550U CN201520283972.6U CN201520283972U CN204597550U CN 204597550 U CN204597550 U CN 204597550U CN 201520283972 U CN201520283972 U CN 201520283972U CN 204597550 U CN204597550 U CN 204597550U
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CN
China
Prior art keywords
battery
cell
battery module
mux
variable connector
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201520283972.6U
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Chinese (zh)
Inventor
王后连
周公博
朱真才
李洋
李伟
曹国华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou Hengyuan Electrical Appliances Co ltd
China University of Mining and Technology CUMT
Original Assignee
Xuzhou Hengyuan Electrical Appliances Co ltd
China University of Mining and Technology CUMT
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Publication date
Application filed by Xuzhou Hengyuan Electrical Appliances Co ltd, China University of Mining and Technology CUMT filed Critical Xuzhou Hengyuan Electrical Appliances Co ltd
Priority to CN201520283972.6U priority Critical patent/CN204597550U/en
Application granted granted Critical
Publication of CN204597550U publication Critical patent/CN204597550U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

With a battery pack for stand-by unit, this battery pack comprises: main battery module, MUX, controller, reserve battery module; Main battery module is connected with MUX; MUX is connected with reserve battery module; Controller is connected with main battery module, MUX, reserve battery module successively.Controller controls main battery module, and estimates the state-of-charge SOC of cell iwith capacity Q i, as the capacity Q of certain cell iwhen being less than 80% with rated capacity Q ratio, standby cell is selected to replace problem battery; As the SOC of a certain cell idiffer by more than 10% with the average SOC of other cells, count, add up to exceed certain number of times, replace cell; If do not reach set point number, according to monomer battery voltage height, cell for subsequent use is selected to charge to cell to the charging of problem battery or problem battery.

Description

A kind of battery pack with stand-by unit
Technical field
The utility model relates to a kind of battery pack, particularly a kind of battery pack with stand-by unit.
Background technology
Storage battery (as super capacitor, lithium battery etc.) is as power source, generally be connected into battery module to use, but due to the reason of raw material, equipment, manufacturing process, even if the battery of same batch, its parameter such as capacity, internal resistance also can be different, in use there will be over-charging of battery or cross the phenomenon of putting.When battery pack is in a kind of like this state of inconsistency, can cause the average size of capacity lower than battery pack of some cell, in its discharge process, first its electricity discharges.Although now other batteries also have a lot of electricity, in order to protect this cell, having to stop the electric discharge of whole battery pack, therefore not making full use of the energy in battery pack.Time more serious, there will be that a certain cell is scrapped completely, the intact situation of other batteries, whole battery pack can be caused like this to scrap and quit work.
Current battery pack is made up of some cells, equalizing circuit usually, does not arrange reserve battery in inside.When cell consistency is bad, portfolio effect is not good, a certain cell capacity, reduced lifespan can be caused, according to Bucket Principle, the actual capacity of battery pack is often by the constraint of problem cell, and described problem cell is that capacity reduces, state-of-charge departs from average state-of-charge.If things go on like this, there will be when whole battery pack is scrapped, actual battery group inner most cell can also continue the phenomenon used, and thus form the wasting of resources.
Summary of the invention
The purpose of this utility model to provide a kind of battery pack with stand-by unit, solves the problem that existing internal battery pack problem cell affects battery pack service efficiency.
For realizing above-mentioned utility model object, the utility model by the following technical solutions: this battery pack comprises: main battery module, MUX, controller, reserve battery module; Main battery module is connected with MUX; MUX is connected with reserve battery module; Controller is connected with main battery module, MUX, reserve battery module successively.
Described main battery module comprises Acquisition Circuit, cell and variable connector; The parallel connection of Acquisition Circuit and cell is connected, and cell and variable connector intersect successively and be connected in series.
Described reserve battery module comprises Acquisition Circuit for subsequent use, cell for subsequent use, bidirectional voltage boosting circuit, electronic switch; Reserve battery module is made up of multiple branch road, and in each branch road, cell for subsequent use is connected with bidirectional voltage boosting circuit connected in series; Cell for subsequent use and Acquisition Circuit are connected in parallel; Electronic switch is connected with bidirectional voltage boosting circuit in parallel.
Described controller controls main battery module, and estimates the state-of-charge SOC of cell iwith capacity Q i, as the capacity Q of certain cell iwhen being less than 80% with rated capacity Q ratio, standby cell is selected to replace problem battery; As the SOC of a certain cell idiffer by more than 10% with the average SOC of other cells, count, add up to exceed certain number of times, replace cell; If do not reach set point number, according to monomer battery voltage height, cell for subsequent use is selected to charge to cell to the charging of problem battery or problem battery.
Preferably, described variable connector has three interfaces, and variable connector is interface 1 near left side anode, and variable connector is interface 2 near right side battery cathode, and near MUX is interface 3; Synchronization only connects any 2 interfaces, disconnects other interfaces; Generally, 1,3 interfaces connected by variable connector, disconnect other interfaces.
Preferably, to realize cell replacement problem battery for subsequent use, controller is needed to control variable connector; When go wrong battery and cell degradation time, 1,2 interfaces connected by variable connector on the left of control problem battery, disconnect the connection between 2 and 3,1 and 3; 2,3 interfaces connected by variable connector on the right side of control problem battery; Other variable connectors remain unchanged; Control MUX simultaneously, make the wire of No. 2 interfaces of the variable connector of the adjacent both sides of problem battery connect the reserve battery tributary interface H of MUX respectively, G; The paralleling switch keeping bidirectional voltage boosting circuit is also needed to close, short circuit bidirectional voltage boosting circuit.
Preferably, to realize cell for subsequent use to the charging of problem battery, controller is needed to control variable connector; When go wrong battery and brownout time, 1,2 interfaces connected by variable connector on the left of control problem battery; 2,3 interfaces connected by variable connector on the right side of control problem battery; Other variable connector actions remain unchanged; Control MUX simultaneously, make the wire of No. 2 interfaces of the variable connector of the adjacent both sides of problem battery connect reserve battery tributary interface H, G of MUX respectively; Also need the paralleling switch keeping bidirectional voltage boosting circuit to disconnect, control bidirectional voltage boosting circuit and charge to problem battery.
Preferably, to problem of implementation battery to the charging of monomer reserve battery, controller is needed to control variable connector; When go wrong battery and overtension time, 1,2 interfaces connected by variable connector on the left of control problem battery; 2,3 interfaces connected by variable connector on the right side of control problem battery; Other variable connector actions remain unchanged; Control MUX simultaneously, make the wire of No. 2 interfaces of the variable connector of the adjacent both sides of problem battery connect reserve battery tributary interface H, G of MUX respectively; Also need the paralleling switch keeping bidirectional voltage boosting circuit to disconnect, control bidirectional voltage boosting circuit and charge to reserve battery.
Beneficial effect, owing to have employed such scheme, during reserve battery replacement problem battery, controller controls variable connector, disconnects the path of problem battery and neighboring unit cell; Control MUX simultaneously, make the wire of the variable connector of the adjacent both sides of problem battery connect the reserve battery branch road of MUX respectively, be communicated with the cell of reserve battery and problem battery both sides; The paralleling switch of bidirectional voltage boosting circuit is kept to connect, thus replacement problem battery.When reserve battery charges to problem battery, compare the action of reserve battery replacement problem battery, other actions are identical, only need the paralleling switch keeping bidirectional voltage boosting circuit to disconnect, and control bidirectional voltage boosting circuit to problem battery or cell charging.So, cell for subsequent use can realize replacement problem battery and secondary is balanced, solves the problem that existing internal battery pack problem cell affects battery pack service efficiency, reaches the purpose of this utility model.
Advantage: when internal battery pack goes wrong battery, uses cell for subsequent use to its charging or directly replaces, improve battery pack service efficiency.
Accompanying drawing illustrates:
Fig. 1 is a kind of battery pack system structure chart with stand-by unit of the present utility model.
Embodiment
Description below in conjunction with accompanying drawing is done into lower step to an embodiment of the present utility model:
The battery pack with stand-by unit of this practicality comprises: main battery module, MUX, controller, reserve battery module.Main battery module is connected with MUX; MUX is connected with reserve battery module.Controller is connected with main battery module, MUX, reserve battery module successively.
Fig. 1 is a kind of battery pack system structure chart with stand-by unit, 9 cell series connection are set in main battery module, 2 reserve battery branch roads are set in reserve battery module to be easier to understand description, but the quantity of cell, reserve battery can be more.
Described main battery module comprises Acquisition Circuit, cell and variable connector.Acquisition Circuit is connected with cell parallel connection; Cell 1-9 and variable connector 1-10 intersects successively and is connected in series.
Described reserve battery module comprises Acquisition Circuit for subsequent use, cell for subsequent use, bidirectional voltage boosting circuit, electronic switch.Reserve battery module is made up of some branch roads.In each branch road, cell for subsequent use is connected with bidirectional voltage boosting circuit connected in series; Cell for subsequent use and Acquisition Circuit are connected in parallel; Electronic switch is connected with bidirectional voltage boosting circuit in parallel.
Preferably, described variable connector has three interfaces, and variable connector is interface 1 near left side anode, and variable connector is interface 2 near right side battery cathode, and near MUX is interface 3.Any 2 interfaces only connected by synchronization variable connector, disconnect other interfaces.Generally, 1,3 interfaces connected by variable connector, disconnect other interfaces.
Preferably, to realize cell replacement problem battery for subsequent use, controller is needed to control variable connector; When go wrong battery and cell degradation time, 1,2 interfaces connected by variable connector on the left of control problem battery, disconnect the connection between 2 and 3,1 and 3; 2,3 interfaces connected by variable connector on the right side of control problem battery; Other variable connectors remain unchanged; Control MUX simultaneously, make the wire of No. 2 interfaces of the variable connector of the adjacent both sides of problem battery connect the reserve battery tributary interface H of MUX respectively, G; The paralleling switch keeping bidirectional voltage boosting circuit is also needed to close, short circuit bidirectional voltage boosting circuit.
Preferably, to realize cell for subsequent use to the charging of problem battery, controller is needed to control variable connector; When go wrong battery and brownout time, 1,2 interfaces connected by variable connector on the left of control problem battery; 2,3 interfaces connected by variable connector on the right side of control problem battery; Other variable connector actions remain unchanged; Control MUX simultaneously, make the wire of No. 2 interfaces of the variable connector of the adjacent both sides of problem battery connect reserve battery tributary interface H, G of MUX respectively; Also need the paralleling switch keeping bidirectional voltage boosting circuit to disconnect, control bidirectional voltage boosting circuit and charge to problem battery.
Preferably, to problem of implementation battery to the charging of monomer reserve battery, controller is needed to control variable connector; When go wrong battery and overtension time, 1,2 interfaces connected by variable connector on the left of control problem battery; 2,3 interfaces connected by variable connector on the right side of control problem battery; Other variable connector actions remain unchanged; Control MUX simultaneously, make the wire of No. 2 interfaces of the variable connector of the adjacent both sides of problem battery connect reserve battery tributary interface H, G of MUX respectively; Also need the paralleling switch keeping bidirectional voltage boosting circuit to disconnect, control bidirectional voltage boosting circuit and charge to reserve battery.

Claims (3)

1. with a battery pack for stand-by unit, it is characterized in that: this battery pack comprises: main battery module, MUX, controller, reserve battery module; Main battery module is connected with MUX; MUX is connected with reserve battery module; Controller is connected with main battery module, MUX, reserve battery module successively.
2. a kind of battery pack with stand-by unit according to claim 1, is characterized in that: main battery module comprises Acquisition Circuit, cell and variable connector; The parallel connection of Acquisition Circuit and cell is connected, and cell and variable connector intersect successively and be connected in series.
3. a kind of battery pack with stand-by unit according to claim 1, is characterized in that: reserve battery module comprises Acquisition Circuit for subsequent use, cell for subsequent use, bidirectional voltage boosting circuit, electronic switch; Reserve battery module is made up of multiple branch road, and in each branch road, cell for subsequent use is connected with bidirectional voltage boosting circuit connected in series; Cell for subsequent use and Acquisition Circuit are connected in parallel; Electronic switch is connected with bidirectional voltage boosting circuit in parallel.
CN201520283972.6U 2015-05-05 2015-05-05 A kind of battery pack with stand-by unit Expired - Fee Related CN204597550U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104810891A (en) * 2015-05-05 2015-07-29 中国矿业大学 Battery pack with standby unit and dynamic management method of battery pack
CN111361420A (en) * 2020-03-19 2020-07-03 湖北亿纬动力有限公司 Power battery system and electric automobile
TWI732687B (en) * 2020-09-22 2021-07-01 低碳動能開發股份有限公司 Vehicle lithium iron phosphate battery backup power control system and control method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104810891A (en) * 2015-05-05 2015-07-29 中国矿业大学 Battery pack with standby unit and dynamic management method of battery pack
CN111361420A (en) * 2020-03-19 2020-07-03 湖北亿纬动力有限公司 Power battery system and electric automobile
TWI732687B (en) * 2020-09-22 2021-07-01 低碳動能開發股份有限公司 Vehicle lithium iron phosphate battery backup power control system and control method

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150826

Termination date: 20170505

CF01 Termination of patent right due to non-payment of annual fee