CN202535104U - Battery management system capable of automatically cutting off failure units in series-connected battery pack - Google Patents

Battery management system capable of automatically cutting off failure units in series-connected battery pack Download PDF

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Publication number
CN202535104U
CN202535104U CN201220100178XU CN201220100178U CN202535104U CN 202535104 U CN202535104 U CN 202535104U CN 201220100178X U CN201220100178X U CN 201220100178XU CN 201220100178 U CN201220100178 U CN 201220100178U CN 202535104 U CN202535104 U CN 202535104U
Authority
CN
China
Prior art keywords
battery
series
battery unit
units
interlock switch
Prior art date
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
CN201220100178XU
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Chinese (zh)
Inventor
毛珂
况钧耀
彭滔
毛林彬
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.)
CHENGDU YUNENGTONG ENERGY DEVELOPMENT Co Ltd
Original Assignee
CHENGDU YUNENGTONG ENERGY DEVELOPMENT Co Ltd
Priority date (The priority date 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 date listed.)
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Publication date
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Priority to CN201220100178XU priority Critical patent/CN202535104U/en
Application granted granted Critical
Publication of CN202535104U publication Critical patent/CN202535104U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a battery management system capable of automatically cutting off failure units in a series-connected battery pack. The battery management system capable of automatically cutting off the failure units in the series-connected battery pack is characterized by comprising a battery pack formed by a plurality of series-connected battery units, wherein two ends of each battery unit are connected with a battery unit detection module. A positive electrode and a negative electrode of each battery unit are respectively connected with a contact head of a two-circuit interlock switch, and an active end of the two-circuit interlock switch is connected with adjacent negative electrodes of battery units in order to enable the battery units to be connected in series. The battery unit detection module is connected with the two-circuit interlock switch and connected with a main control module through a communication line. The battery units are connected with the main control switch in series, the main control switch is connected with the main control module, and the main control module is connected with a host computer through a trunk. The battery management system can automatically cut the failure units near expiry in the series-connected battery units away from the whole series-connected return circuit; meanwhile, the battery units being cut off can also be reconnected to the series-connected return circuit when the battery units are needed, for example, when charging is needed. Therefore, the flexibility is high, and the battery consistency requirement is reduced.

Description

A kind of battery management system that can excise disabling unit in the series battery automatically
Technical field
The utility model relates to the battery management device, is specifically related to a kind of battery management system that can excise disabling unit in the series battery automatically.
Background technology
Along with various be the popularization of the equipment of the energy with the battery, the reliability of battery system and maintenance cost more and more receive people's attention.Because battery cell voltage is lower, in order to reach the requirement of electrical appliance electric pressure, need connect to battery unit, to reach high voltage, is convenient to directly drive electrical appliance work.Need the voltage about 48v like electric bicycle, electronic big bus car needs the voltage about 500v, all need use the battery series connection of some to use.But the series-connected cell system may cause whole crosstalk pond to be lost efficacy because a certain cell performance in the series loop is bad, for the user causes damage.Series connection quantity is many more, and the probability that is out of order is also just big more, and the difficulty of maintenance also increases thereupon.
Because the battery unit individual difference, electric parameters such as the capacity of each battery unit, self discharge, internal resistance and discharge platform can not be just the same.The work even the approaching battery unit of initial condition is combined in series through the use of a period of time, the unbalanced phenomenon in inner each unit of series system usually can occur and produce.Though can on one section degree, alleviate the individual difference that battery unit is in operation and produces through battery pack being installed additional balancing circuitry, if battery unit lost efficacy for some reason, battery pack still can lose efficacy, traditional method can only be taken stopgap measures and can not be effected a permanent cure.
The utility model content
The purpose of the utility model promptly is to overcome the deficiency of prior art; A kind of battery management system that can excise disabling unit in the series battery automatically is provided; The battery unit that it can be automatically be about to the series battery the inside to lose efficacy cut off out whole series loop, also can be in needs inserts again such as the time battery unit that will cut off of charging.Flexibility is very high.Greatly reduce the conforming requirement of battery unit.
The utility model is realized through following technical scheme:
A kind of battery management system that can excise disabling unit in the series battery automatically, it comprises the battery pack that is in series by a plurality of battery units, each battery unit two ends is connected with the battery unit detection module through photoisolator; Also comprise a plurality of two road interlock switch, the both positive and negative polarity of each battery is connected with two contacts of one two road interlock switch respectively, and the movable end of two road interlock switch is connected with adjacent battery unit negative pole connects battery unit; The battery unit detection module is connected with two road interlock switch, and the battery unit detection module is connected with the master control module with photoisolator through communication line; Battery pack is in series with main switching control, and main switching control is connected through communication line with the master control module, and the master control module is connected with host computer through CAN bus or 485 buses.
Each battery unit is parallel with a diode, and the anode of diode is connected with the negative pole of battery unit, and the negative electrode of diode is connected with the movable end of two road interlock switch.
Described battery unit detection module comprises test circuit for cell status and PLC controller; Test circuit for cell status is connected with the PLC controller through communication line; The PLC controller connects with two road corresponding interlock switch through circuit; Described master control module is the PLC controller, and described host computer is a PC.
The advantage of the utility model is:
1. have in the discharge process in real time the function that had reached the battery unit excision of putting threshold value in the battery pack, guarantee the whole battery group discharging voltage balance with this; Adopt this structure can guarantee that each battery unit discharges fully in the battery pack, can guarantee that again each battery unit is unlikely to because of overdischarge causes damage, has prolonged the useful life and the reliability of battery pack greatly simultaneously;
2. have in the charging process in real time with the function that has reached the battery unit excision that overcharges threshold value in the battery pack; Can reach the state that is full of fully one by one with this battery unit that guarantees the electricity of underfill still, adopt this kind structure can be full of the higher voltage batteries group with the charger of low voltage;
3. has the function of judging fail battery unit in the battery pack; Be lower than the permission minimum threshold like the fault battery cell voltage; This moment, this battery unit can forever be excised out battery pack; And,, and no longer it is carried out access operation with convenient ensuing repair work by the numbering and the malfunction of this fail battery unit of host computer record;
4. battery unit is parallel with diode; Need not break off main switching control switching moment; The operating current in whole loop will flow in the loop through diode; Realize online excision or access, the output of battery pack or input can not interrupted, and use under the situation that is adapted at not allowing electric power that short interruption is arranged;
5. the static power consumption of this system is low, can be connected on the battery pack for a long time.
Description of drawings
Fig. 1 is the structured flowchart of the utility model embodiment one;
Fig. 2 is the structured flowchart of the utility model embodiment two.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further, the protection range of the utility model is not limited to the following stated.
Embodiment one:
As shown in Figure 1, a kind of battery management system that can excise disabling unit in the series battery automatically, it comprises the battery pack that is in series by a plurality of battery units, each battery unit two ends is connected with the battery unit detection module through photoisolator; Also comprise a plurality of two road interlock switch, the both positive and negative polarity of each battery unit is connected with two contacts of one two road interlock switch respectively, and the movable end of two road interlock switch is connected with adjacent battery unit negative pole connects battery unit; The battery unit detection module is connected with two road interlock switch, and the battery unit detection module is connected with the master control module with photoisolator through communication line; Battery pack is in series with main switching control, and main switching control is connected through communication line with the master control module, and the master control module is connected with host computer through CAN bus or 485 buses.
The battery unit detection module comprises test circuit for cell status and PLC controller; Test circuit for cell status is connected with the PLC controller through communication line; Test circuit for cell status can be used for sending the battery unit working state signal to the PLC controller by operation; The PLC controller be connected with two road corresponding interlock switch through circuit, the master control module is the PLC controller, host computer is a PC.
But the test circuit for cell status detection of dynamic battery unit state in the battery unit detection module; And status signal is sent to the PLC controller; Voltage just often; The movable end that the PLC controller is controlled two road interlock switch is connected with the positive pole of battery unit, and battery unit is under the normal charging and discharging state.When battery cell voltage unusual; Or reached and overcharge, cross when putting threshold voltage, the movable end that the PLC controller is controlled two road interlock switch is connected with the negative pole of battery unit, and this battery unit is in by the excision state; By bypass outside series system; And the operating state of this battery unit transferred to the master control module, the master control module is passed to host computer with the information of receiving, the numbering and the state of this battery unit of host computer record;, and no longer the fail battery unit is inserted next to the repair work of fail battery unit with convenient.
In whole series loop by main switching control that can bear battery pack current and voltage of master control module controls; When battery unit when carrying out change action; Master control module controls main switching control temporarily breaks off the whole battery group loop, and then the access of beginning battery unit or excision operation.Master control module controls main switching control was closed after operation was accomplished, thereby had realized the zero current switching, reduced the impact to switch element, improved its life-span and reliability.
Embodiment two:
As shown in Figure 2, present embodiment is on the basis of embodiment one, to improve to obtain, and promptly each battery unit is parallel with a diode, and the anode of diode is connected with the negative pole of battery unit, and the negative electrode of diode is connected with the movable end of two road interlock switch.Need not break off main switching control switching moment like this, the operating current in whole loop will be mobile in the loop through diode, realize online excision or access.Output of entire cell system or input can not interrupted, and use under the situation that is adapted at not allowing electric power that short interruption is arranged.

Claims (3)

1. the battery management system that can excise disabling unit in the series battery automatically is characterized in that it comprises the battery pack that is in series by a plurality of battery units, and each battery unit two ends is connected with the battery unit detection module through photoisolator;
Also comprise a plurality of two road interlock switch, the both positive and negative polarity of each battery is connected with two contacts of one two road interlock switch respectively, and the movable end of two road interlock switch is connected with adjacent battery unit negative pole connects battery unit;
The battery unit detection module is connected with two road interlock switch, and the battery unit detection module is connected with the master control module with photoisolator through communication line;
Battery pack is in series with main switching control, and main switching control is connected through communication line with the master control module, and the master control module is connected with host computer through CAN bus or 485 buses.
2. a kind of battery management system that can excise disabling unit in the series battery automatically according to claim 1; It is characterized in that; Each battery unit is parallel with a diode; The anode of diode is connected with the negative pole of battery unit, and the negative electrode of diode is connected with the movable end of two road interlock switch.
3. a kind of battery management system that can excise disabling unit in the series battery automatically according to claim 1 and 2; It is characterized in that; Described battery unit detection module comprises test circuit for cell status and PLC controller, and test circuit for cell status is connected with the PLC controller through communication line, and the PLC controller connects with two road corresponding interlock switch through circuit; Described master control module is the PLC controller, and described host computer is a PC.
CN201220100178XU 2012-03-16 2012-03-16 Battery management system capable of automatically cutting off failure units in series-connected battery pack Expired - Fee Related CN202535104U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201220100178XU CN202535104U (en) 2012-03-16 2012-03-16 Battery management system capable of automatically cutting off failure units in series-connected battery pack

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201220100178XU CN202535104U (en) 2012-03-16 2012-03-16 Battery management system capable of automatically cutting off failure units in series-connected battery pack

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624050A (en) * 2012-03-16 2012-08-01 成都宇能通能源开发有限公司 Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack
CN102991372A (en) * 2012-11-26 2013-03-27 精功镇江汽车制造有限公司 Battery management system of pure electric vehicle
CN103532203A (en) * 2013-10-30 2014-01-22 薛可扬 Battery pack application node as well as matrix battery management system and implementation method thereof
CN103872710A (en) * 2012-12-11 2014-06-18 苏州宝时得电动工具有限公司 Battery management system and electric tool
CN103904376A (en) * 2014-04-23 2014-07-02 武汉市欧力普能源与自动化技术有限公司 Self-adaptive optimized control system and method of distributive battery management system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624050A (en) * 2012-03-16 2012-08-01 成都宇能通能源开发有限公司 Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack
CN102624050B (en) * 2012-03-16 2014-02-19 成都宇能通能源开发有限公司 Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack
CN102991372A (en) * 2012-11-26 2013-03-27 精功镇江汽车制造有限公司 Battery management system of pure electric vehicle
CN103872710A (en) * 2012-12-11 2014-06-18 苏州宝时得电动工具有限公司 Battery management system and electric tool
CN103532203A (en) * 2013-10-30 2014-01-22 薛可扬 Battery pack application node as well as matrix battery management system and implementation method thereof
CN103532203B (en) * 2013-10-30 2016-04-20 薛可扬 A kind of battery pack application node and matrix battery management system and implementation method
CN103904376A (en) * 2014-04-23 2014-07-02 武汉市欧力普能源与自动化技术有限公司 Self-adaptive optimized control system and method of distributive battery management system
CN103904376B (en) * 2014-04-23 2016-08-17 武汉市欧力普能源与自动化技术有限公司 The control system of a kind of distributed battery management system adaptive optimization and method

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

Granted publication date: 20121114

Termination date: 20160316

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