CN103107521B - A kind of multi-series lithium battery pack protection board - Google Patents
A kind of multi-series lithium battery pack protection board Download PDFInfo
- Publication number
- CN103107521B CN103107521B CN201310062074.3A CN201310062074A CN103107521B CN 103107521 B CN103107521 B CN 103107521B CN 201310062074 A CN201310062074 A CN 201310062074A CN 103107521 B CN103107521 B CN 103107521B
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- China
- Prior art keywords
- lithium battery
- series
- charge
- battery pack
- voltage
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- Expired - Fee Related
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 32
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 230000000087 stabilizing effect Effects 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims description 8
- 239000003381 stabilizer Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The problem to be solved in the present invention is to provide a kind of multi-series lithium battery pack protection board; comprise the voltage stabilizing circuit between negative pole and positive pole charge node that is series at every series lithium battery group and compare switching circuit, between the earth terminal comparing the first segment lithium battery of switching circuit and minus earth, being connected to a charge and discharge switch.Beneficial effect of the present invention is: lithium battery protection board of the present invention is applicable to the charge and discharge protecting of multi-series lithium battery group, can ensure when being full of electricity that the voltage differences between each cell is less than set point (general ± 20mV), realize all filling of each cell of battery pack, effectively improve the charging effect under serial connection charge mode; Detect the voltage of each cell in battery pack, protect and extend battery, product can long-term reliable and stable work in-20 DEG C ~+60 DEG C ambient temperature ranges simultaneously.
Description
Technical field
The present invention relates to lithium cell charging resist technology field, particularly relate to a kind of multi-series lithium battery pack protection board.
Background technology
In lithium ion battery use procedure, use for avoiding the mistake of user and charger continuous firing and cause battery to heat up, the decomposition of battery electrolyte inside and produce gas and make to press in it liter, disengaging of lithium metal etc. and cause danger that is on fire and that break.Therefore, in lithium ion battery loop, all to adopt protective circuit, Li-Ion rechargeable battery is protected, over-charge protective function must be had, to prevent the deterioration in characteristics of battery, on fire and break, guarantee the safety and reliability of battery.
In the prior art; mostly protective circuit is the charge protection for a string battery pack, and voltage differences when being full of electricity between each cell is larger, and the charge condition of each battery is uneven; charging effect under serial connection charge mode is not good, thus affects the useful life of battery.
Summary of the invention
For the problems referred to above, the problem to be solved in the present invention is to provide a kind of multi-series lithium battery pack protection board of charge balancing.
Technical scheme of the present invention is as follows:
A kind of multi-series lithium battery pack protection board; comprise the voltage stabilizing circuit between negative pole and positive pole charge node that is series at every series lithium battery group and compare switching circuit, between the earth terminal comparing the first segment lithium battery of switching circuit and minus earth, being connected to a charge and discharge switch.
Preferably, described voltage stabilizing circuit comprises voltage-stabiliser tube between the two poles of the earth being series at every series lithium battery group and current-limiting resistance.
Preferably, described charge and discharge switch is metal-oxide-semiconductor.
Preferably, the described switching circuit that compares comprises comparator and triode, the negative pole of an input termination voltage-stabiliser tube of comparator, another input connects positive pole charge node by current-limiting resistance, the output of comparator connects the base stage of triode by a resistance, the emitter and collector of described triode connects source electrode and the grid of metal-oxide-semiconductor respectively.
Beneficial effect of the present invention is: lithium battery protection board of the present invention is applicable to the charge and discharge protecting of multi-series lithium battery group, can ensure when being full of electricity that the voltage differences between each cell is less than set point (general ± 20mV), realize all filling of each cell of battery pack, effectively improve the charging effect under serial connection charge mode; Detect the voltage of each cell in battery pack, protect and extend battery, product can long-term reliable and stable work in-20 DEG C ~+60 DEG C ambient temperature ranges simultaneously.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the baffle of a string battery pack of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
Below in conjunction with accompanying drawing for n series lithium battery group, brief description is made to the preferred embodiment of one of the present invention.
As shown in Figure 1, 2:
A kind of multi-series lithium battery pack protection board, comprise the negative pole of each the series lithium battery group being series at n series lithium battery group and the voltage stabilizing circuit 1 between positive pole charge node B1, B2 to Bn and compare switching circuit 2, between the earth terminal comparing the first segment lithium battery of switching circuit 2 and minus earth, being connected to a charge and discharge switch 3;
Described voltage stabilizing circuit 1 comprises voltage-stabiliser tube (Z1, Z2 to Zn) between each the series lithium battery group the two poles of the earth being series at n series lithium battery group and current-limiting resistance (RA1, RA2 to RAn), described charge and discharge switch 3 is metal-oxide-semiconductor M1, the described switching circuit 2 that compares comprises comparator (A1, A2 to An) and the triode (Q1 that connect corresponding to it, Q2 to Qn), n comparator (A1, A2 to An) a n voltage-stabiliser tube (Z1 corresponding to input termination, Z2 to Zn) negative pole, another input meets n corresponding positive pole charge node (B1 by current-limiting resistance, B2 to Bn), n comparator (A1, A2 to An) output meet corresponding triode (Q1 by a resistance, Q2 to Qn) base stage, described triode (Q1, Q2 to Qn) emitter and collector all connect source electrode and the grid of metal-oxide-semiconductor M1.
Specific works principle is: charger is the charging of multi-series lithium battery group, voltage-stabiliser tube Z1, Z2 to Zn adopts 3.6V voltage-stabiliser tube, respectively by current-limiting resistance RA1, RA2 to RAn is comparator A1, 3 pins of A2 to An provide a stable 3.6V voltage, along with charger is constantly the charging of multi-series lithium battery group, the positive pole charge node B1 of every series lithium battery group, the voltage of B2 to Bn progressively promotes, when its voltage is higher than 4.2V, namely comparator A1, when the voltage of 2 pins of A2 to An is higher than 4.2V, comparator A1, the internal body diodes conducting of A2 to An, now comparator A1, 4 pins of A2 to An export high level to corresponding triode Q1, the base stage of Q2 to Qn is powered, as triode Q1, when the base stage of Q2 to Qn has electric current to pass through, according to its characteristic, triode Q1, the collector electrode of Q2 to Qn and emitter conducting, cause grid and the source intereelectrode short-circuit of metal-oxide-semiconductor M1, thus the drain electrode of metal-oxide-semiconductor M1 and source electrode are disconnected, namely reach between battery cathode and charger negative pole and form off state, completing charger is no longer the protection process of battery charging.
If following table 1 is for the battery pack of 14 strings, the data of monitoring with charge-discharge test instrument, table 1 be the data of intercepting when being full of electricity close to battery in 5 minutes.Can the finding out of Zhe clearly by table 1, this kind of baffle has good current-sharing protective effect to battery, and under baffle monitoring, the battery error of 14 strings are less than 20mV.
The data when battery pack that table 114 is gone here and there is full of electricity in 5 minutes
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (2)
1. a multi-series lithium battery pack protection board, it is characterized in that: comprise the voltage stabilizing circuit between negative pole and positive pole charge node that is series at every series lithium battery group and compare switching circuit, between the earth terminal comparing the first segment lithium battery of switching circuit and minus earth, be connected to a charge and discharge switch; Described charge and discharge switch is metal-oxide-semiconductor;
The described switching circuit that compares comprises comparator and triode, the negative pole of an input termination voltage-stabiliser tube of comparator, another input connects corresponding positive pole charge node by current-limiting resistance, the output of comparator connects the base stage of triode by a resistance, the emitter and collector of described triode connects source electrode and the grid of metal-oxide-semiconductor respectively.
2. multi-series lithium battery pack protection board according to claim 1, is characterized in that: described voltage stabilizing circuit comprises voltage-stabiliser tube between the two poles of the earth being series at every series lithium battery group and current-limiting resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062074.3A CN103107521B (en) | 2013-02-28 | 2013-02-28 | A kind of multi-series lithium battery pack protection board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310062074.3A CN103107521B (en) | 2013-02-28 | 2013-02-28 | A kind of multi-series lithium battery pack protection board |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103107521A CN103107521A (en) | 2013-05-15 |
| CN103107521B true CN103107521B (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310062074.3A Expired - Fee Related CN103107521B (en) | 2013-02-28 | 2013-02-28 | A kind of multi-series lithium battery pack protection board |
Country Status (1)
| Country | Link |
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| CN (1) | CN103107521B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110266068B (en) * | 2019-06-18 | 2023-11-07 | 季华实验室 | High-voltage battery control circuit, control method and storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163019A (en) * | 1994-10-31 | 1997-10-22 | 摩托罗拉公司 | Protection switch for a battery powered device |
| US5695886A (en) * | 1996-03-07 | 1997-12-09 | Motorola, Inc. | Overvoltage disconnect circuit and battery using same |
| CN201601478U (en) * | 2009-12-31 | 2010-10-06 | 深圳市力通威电子科技有限公司 | Soft package type lithium battery protection circuit |
| CN202260414U (en) * | 2011-09-05 | 2012-05-30 | 惠州市汉派电池科技有限公司 | Over-charging protection circuit for power lithium ion battery |
-
2013
- 2013-02-28 CN CN201310062074.3A patent/CN103107521B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1163019A (en) * | 1994-10-31 | 1997-10-22 | 摩托罗拉公司 | Protection switch for a battery powered device |
| US5695886A (en) * | 1996-03-07 | 1997-12-09 | Motorola, Inc. | Overvoltage disconnect circuit and battery using same |
| CN201601478U (en) * | 2009-12-31 | 2010-10-06 | 深圳市力通威电子科技有限公司 | Soft package type lithium battery protection circuit |
| CN202260414U (en) * | 2011-09-05 | 2012-05-30 | 惠州市汉派电池科技有限公司 | Over-charging protection circuit for power lithium ion battery |
Non-Patent Citations (2)
| Title |
|---|
| 一种集散式动力电池组动态均衡管理系统;罗玉涛等;《电工技术学报》;20080831;第23卷(第8期);第131－136页以及第142页 * |
| 手持终端设备中的锂电池充电技术;王非等;《电子器件》;20041231;第27卷(第4期);第755－758页 * |
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| Publication number | Publication date |
|---|---|
| CN103107521A (en) | 2013-05-15 |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20170228 |