CN201138676Y - Balanced control module of protection circuit board of 10 string lithium ion batteries - Google Patents
Balanced control module of protection circuit board of 10 string lithium ion batteries Download PDFInfo
- Publication number
- CN201138676Y CN201138676Y CNU2007200989512U CN200720098951U CN201138676Y CN 201138676 Y CN201138676 Y CN 201138676Y CN U2007200989512 U CNU2007200989512 U CN U2007200989512U CN 200720098951 U CN200720098951 U CN 200720098951U CN 201138676 Y CN201138676 Y CN 201138676Y
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- battery
- protection circuit
- control chip
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The utility model relates to a equalizing control module for decimal string lithium ion battery pack protection circuit board, which is characterized in that: the utility model consists of a main control chip, an equalizing resistance and a controlling field effect tube connected with one another. The signal input end of the main control chip is respectively connected with various battery core of the battery pack; the signal output end of the control chip is respectively connected with the grid control end of the controlling field effect tube; the source electrode of the controlling field effect tube is connected with the anode of the corresponding battery core; the equalizing resistance is respectively connected with the cathode of corresponding battery core and the drain electrode of corresponding controlling field effect tube. The main control chip adopts the mode of OZ890. After the protection circuit board is connected with the battery pack, if the signal detected by the chip meets the condition for equalizing start, the equalizing module will begin to work. Therefore, the utility model enhances the group matching rate of the battery core, enhances the recycling service life of battery and ensures the discharge capacity of the battery pack. All in all, the utility model has the advantages of simple structure, reliable performance, low manufacturing cost and wide application scope.
Description
Technical field
The utility model relates to the balanced control module of a kind of lithium ion battery group protection circuit plate, the balanced control module of particularly a kind of ten string lithium ion battery group protection circuit plates.
Background technology
As everyone knows, battery pack is to be combined by some electric cores, and same batch electric core is after making, and all there are certain difference in their capacity, internal resistance.This species diversity is very little at the beginning of using, but through after the several times circulation, the difference between them will continue to increase, and battery pack becomes and seriously do not match, and causes whole Battery pack not use at last.Therefore, must carry out combo to battery before combination, make the less electric core branch of difference at one group, this has just guaranteed the cycle life of battery pack to a certain extent, and these basic measures only are disposable.The balance module of protection circuit has the function of circulation compensation, and it all can compensate the low electric core of capacity in charging process each time, makes battery pack continue the consistency that keeps good.
At present, the balanced principle of the lithium ion battery protection circuit plate that proposes in the industry has: two kinds on energy transfer and energy consumption type.These two kinds of equilibriums that all are based on energy, i.e. Δ Q=I* ∫ t.Because the design complexity of energy transfer, therefore the cost height is used less.Concerning the energy consumption type, if euqalizing current I design is very big, then the temperature rise meeting of baffle is very high, so euqalizing current generally designs about 100mA.Existing general energy consumption type also has simple gate limit manner of comparison, promptly adopt simple gate limit comparator to control the mode of balance module, it has only a constraints, i.e. just action of balance module when electric core voltage is higher than balanced threshold voltage, begin to electric core discharge, after electric core voltage was lower than balanced threshold voltage, equilibrium just stopped action.The shortcoming of this balanced way is: (1) simple gate limit comparator is to protect the control end that overcharges of chip to realize with the single string of a slice, and its action threshold value then needs to consult customized with chip supplier if will change once determining just to be difficult to change.The operation chip cost can increase like this, and delivery cycle can extend.(2) this threshold voltage is difficult to set.If it is too high as 4.20V that this threshold voltage is provided with, because the maximum charging voltage of ten series lithium battery chargers is 42.0V, then balance module is failure to actuate probably, even action charger this moment thinks that battery is full of, the time of continuing to charge the battery does not return very long, the time of so balanced action can be very not long yet, and then Δ Q will be very little, so portfolio effect is just bad.If the too low as 4.10V that this threshold voltage is provided with balanced operate time can be guaranteed, Δ Q can be very big, portfolio effect clearly, but last every economize on electricity core can remain on this platform of 4.10V after battery pack was full of electricity.Make the discharge capacity of battery pack to reduce.
Therefore, provide a kind of balanced control module of ten string lithium ion battery group protection circuit plates of using easy, dependable performance, become one of new problem that this field scientific research personnel is badly in need of researching and developing.
The utility model content
The purpose of this utility model is to overcome the weak point in the above-mentioned technology, and a kind of flexible, two constraints, balanced control module of high-efficiency reliable ten string lithium ion battery group protection circuit plates of being provided with is provided.
The technical scheme that the utility model adopted is for achieving the above object: the balanced control module of a kind of ten string lithium ion battery group protection circuit plates is characterized in that being connected to form by main control chip, equalizing resistance and control field effect transistor; The signal input part of main control chip is connected on each electric core of battery pack; The signal output part of main control chip is connected respectively to the grid control end of control field effect transistor; The source electrode of control field effect transistor links to each other with the positive pole of corresponding battery battery core; Equalizing resistance is connected respectively to the negative pole of corresponding battery battery core and the drain electrode of corresponding control field effect transistor.
The utility model beneficial effect is: increased the combo rate of battery battery core, improved the cycle life of battery, guaranteed the discharge capacity of battery pack.This equilibrium control module has the function of circulation compensation, makes battery pack continue the consistency that keeps good.In a word, it is simple in structure, dependable performance, low cost of manufacture, applied range.
Description of drawings
Fig. 1 is the utility model circuit structure connection diagram.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, details are as follows to embodiment, structure, feature that foundation the utility model provides:
As shown in Figure 1, the balanced control module of a kind of ten string lithium ion battery group protection circuit plates is characterized in that being connected to form by master control chip IC, equalizing resistance R1～R10 and control field effect transistor; The signal input part of main control chip IC is connected on each electric core of battery pack; The signal output part of main control chip IC is connected respectively to the grid control end of control field effect transistor Q1～Q10; The source electrode of control field effect transistor links to each other with the positive pole of corresponding electric core, links to each other with the positive pole of battery battery core B10 as the source electrode of controlling field effect transistor Q10; Equalizing resistance R1～R10 is connected respectively to the negative pole of corresponding electric core and the drain electrode of corresponding control field effect transistor, is connected respectively to the drain electrode of battery battery core B10 negative pole and Q10 as equalizing resistance R10.
The utility model adopts the chip OZ890 of concavo-convex electronics as main control chip IC, monitors the voltage of every economize on electricity core.Threshold voltage vt-this value that is higher than setting when the voltage of electric core can be set flexibly, and the voltage difference of any two economize on electricitys between the cores be when surpassing this value of threshold value Δ V-that is provided with and can set flexibly, and balance module just moves.These two conditions be with relation, must satisfy balance module simultaneously and just move.As long as condition satisfies, no matter be in charging process or under static state, balance module is all worked.Make after battery pack is being full of electricity, all keep good consistency between each electric core.
With the protection circuit plate with after battery pack is connected, if chip detection to signal satisfy balanced entry condition, balance module is just started working.
Above-mentioned detailed description of the balance module of this ten string lithium ion batteries group baffle being carried out with reference to embodiment; be illustrative rather than determinate; can make various specification as required; therefore in the variation and the modification that do not break away under the utility model general plotting, should belong within the protection range of the present utility model.
Claims (2)
1, the balanced control module of a kind of ten string lithium ion battery group protection circuit plates is characterized in that being connected to form by main control chip, equalizing resistance and control field effect transistor; The signal input part of main control chip is connected on each electric core of battery pack; The signal output part of main control chip is connected respectively to the grid control end of control field effect transistor; The source electrode of control field effect transistor links to each other with the positive pole of corresponding battery battery core; Equalizing resistance is connected respectively to the negative pole of corresponding battery battery core and the drain electrode of corresponding control field effect transistor.
2, the balanced control module of ten string lithium ion battery group protection circuit plates according to claim 1 is characterized in that it is OZ890 that described main control chip adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200989512U CN201138676Y (en) | 2007-12-14 | 2007-12-14 | Balanced control module of protection circuit board of 10 string lithium ion batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200989512U CN201138676Y (en) | 2007-12-14 | 2007-12-14 | Balanced control module of protection circuit board of 10 string lithium ion batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201138676Y true CN201138676Y (en) | 2008-10-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200989512U Expired - Lifetime CN201138676Y (en) | 2007-12-14 | 2007-12-14 | Balanced control module of protection circuit board of 10 string lithium ion batteries |
Country Status (1)
| Country | Link |
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| CN (1) | CN201138676Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860066A (en) * | 2009-04-03 | 2010-10-13 | 索尼公司 | Battery pack and charging method |
| CN101986508A (en) * | 2010-12-03 | 2011-03-16 | 安徽力高新能源技术有限公司 | Battery equalizing device |
| CN107086624A (en) * | 2017-05-16 | 2017-08-22 | 沃太能源南通有限公司 | A kind of lithium ion battery active equalization circuit |
| CN114660493A (en) * | 2022-05-20 | 2022-06-24 | 苏州恒美电子科技股份有限公司 | Battery cell information acquisition circuit and battery cell internal resistance acquisition method |
-
2007
- 2007-12-14 CN CNU2007200989512U patent/CN201138676Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860066A (en) * | 2009-04-03 | 2010-10-13 | 索尼公司 | Battery pack and charging method |
| CN101986508A (en) * | 2010-12-03 | 2011-03-16 | 安徽力高新能源技术有限公司 | Battery equalizing device |
| CN101986508B (en) * | 2010-12-03 | 2013-01-16 | 安徽力高新能源技术有限公司 | Battery equalizing device |
| CN107086624A (en) * | 2017-05-16 | 2017-08-22 | 沃太能源南通有限公司 | A kind of lithium ion battery active equalization circuit |
| CN107086624B (en) * | 2017-05-16 | 2023-04-07 | 沃太能源股份有限公司 | Active equalization circuit of lithium ion battery |
| CN114660493A (en) * | 2022-05-20 | 2022-06-24 | 苏州恒美电子科技股份有限公司 | Battery cell information acquisition circuit and battery cell internal resistance acquisition method |
| CN114660493B (en) * | 2022-05-20 | 2022-08-30 | 苏州恒美电子科技股份有限公司 | Battery cell information acquisition circuit and battery cell internal resistance acquisition method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20081022 |