CN220358853U - Lithium battery pack charging saturation equalization circuit - Google Patents
Lithium battery pack charging saturation equalization circuit Download PDFInfo
- Publication number
- CN220358853U CN220358853U CN202322012482.XU CN202322012482U CN220358853U CN 220358853 U CN220358853 U CN 220358853U CN 202322012482 U CN202322012482 U CN 202322012482U CN 220358853 U CN220358853 U CN 220358853U
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- Prior art keywords
- electrically connected
- electrode
- lithium battery
- battery pack
- mos tube
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 44
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 44
- 239000000178 monomer Substances 0.000 claims abstract description 10
- 230000005611 electricity Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 abstract 1
- 238000005259 measurement Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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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- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a lithium battery pack charge saturation equalization circuit, which comprises a plurality of lithium battery cells connected in series, wherein the negative electrode of each lithium battery cell is respectively and electrically connected with the S electrode of an MOS tube, the g electrode of the MOS tube is electrically connected with the output end of a NOT gate, and the d electrode of the MOS tube is electrically connected with a resistor R S Each battery cell is coupled with a protection chip, and the model of the protection chip is S-8241The MOS tube controls to turn off the corresponding charging circuit after the battery monomer is charged and saturated, then the circuit is balanced through the protection chip and the anode and cathode MOS tube Q1/Q2 of the lithium battery pack, voltage is distributed to the battery monomer with low voltage for charging, the balancing effect of the circuit is good, and the service life of the lithium battery pack is prolonged.
Description
Technical Field
The utility model relates to the field of circuits, in particular to a lithium battery pack charging saturation equalization circuit.
Background
When the lithium battery pack is charged in series, the balanced charge of each battery is ensured, otherwise, the performance and the service life of the whole battery pack can be influenced in the use process, and the prior art does not contain the balanced charge control function; the equalizing charge control function of the lithium battery protection chip needs to be externally connected with a CPU, and is realized through serial communication with the protection chip, so that the complexity and design difficulty of a protection circuit are increased, the efficiency and reliability of a system are reduced, and the power consumption is increased.
Disclosure of Invention
In order to achieve the above purpose, the present utility model provides the following technical solutions:
lithium battery pack charging saturation equalization circuit, lithium battery pack include a plurality of lithium cell monomer of establishing ties, and the S utmost point of a MOS pipe is all connected to the free negative pole of every lithium cell respectively, the output of a NOT door is all connected to the equal electricity of the g utmost point of MOS pipe, a resistance R is all connected to the equal electricity of the d utmost point of MOS pipe S Each battery cell is coupled with a protection chip, and the model of the protection chip is S-8241.
Further, the VDD pin and the VSS pin of the protection chip are respectively electrically connected to a voltage measurer, the positive electrode of the voltage measurer is electrically connected to the positive electrode of the corresponding battery cell, and the negative electrode of the voltage measurer is electrically connected to the negative electrode of the corresponding battery cell.
Further, the resistor R S And the input end of the NOT gate is electrically connected with a CO pin of the corresponding protection chip.
Further, the positive electrode of the lithium battery is electrically connected with a series R L And R is M The electrode is electrically connected with the electrode S of a MOS tube Q2, the electrode S of a MOS tube Q1 is electrically connected with the electrode D of the MOS tube Q2, the electrode D of the MOS tube Q2 is electrically connected with the electrode D of the MOS tube Q1, the electrode g of the MOS tube Q1 is electrically connected with the output end of an OR gate, AND the electrode g of the MOS tube Q2 is electrically connected with the output end of an AND gate.
Further, the input end of the OR gate is electrically connected with the CO pin of each protection chip, the input end of the AND gate is electrically connected with the DO pin of each protection chip, the VM pins between the protection chips are electrically connected, the VM pins of each protection chip are also electrically connected with a voltage measurer, the negative electrode of the voltage measurer is electrically connected with the positive electrode of the lithium battery pack, AND the positive electrode of the voltage measurer is electrically connected with the negative electrode of the lithium battery pack.
Compared with the prior art, the utility model has the following beneficial effects:
the application provides a lithium battery pack charge saturation equalization circuit carries out voltage measurement to every battery monomer, controls to turn off the corresponding charging circuit through corresponding protection chip and MOS pipe after the battery monomer charges saturation, then carries out equalization circuit through protection chip and the positive and negative MOS pipe Q1/Q2 of lithium battery pack, distributes voltage to the battery monomer of low voltage, charges, and the equalization effect of circuit is good, prolongs the life of lithium battery pack.
Drawings
Fig. 1 is a schematic circuit diagram of the present application.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The application provides a lithium battery pack charge saturation equalization circuit, as shown in fig. 1, the lithium battery pack comprises a plurality of lithium battery cells connected in series, in this embodiment, two lithium battery cells are included, the lithium battery pack of the utility model comprises but is NOT limited to two lithium battery cells, the negative electrode of each lithium battery cell is respectively and electrically connected with the S electrode of an MOS tube, the g electrode of the MOS tube is electrically connected with the output end of a NOT gate, and the d electrode of the MOS tube is electrically connected with a resistor R S Each battery cell is coupled with a protection chip, and the model of the protection chip is S-8241. The VDD pin and the VSS pin of the protection chip are respectively and electrically connected with a voltage measurer, the positive electrode of the voltage measurer is electrically connected with the positive electrode of the corresponding battery cell, and the negative electrode of the voltage measurer is electrically connected with the negative electrode of the corresponding battery cell. The resistor R S And the voltage is equal toThe positive electrode of the measurer is electrically connected, and the input end of the NOT gate is electrically connected with the CO pin of the corresponding protection chip. The positive electrode of the lithium battery is electrically connected with a group of R in series connection L And R is M The electrode is electrically connected with the electrode S of a MOS tube Q2, the electrode S of a MOS tube Q1 is electrically connected with the electrode D of the MOS tube Q2, the electrode D of the MOS tube Q2 is electrically connected with the electrode D of the MOS tube Q1, the electrode g of the MOS tube Q1 is electrically connected with the output end of an OR gate, AND the electrode g of the MOS tube Q2 is electrically connected with the output end of an AND gate. The input end of the OR gate is respectively AND electrically connected with the CO pin of each protection chip, the input end of the AND gate is respectively AND electrically connected with the DO pin of each protection chip, the VM pins among the protection chips are electrically connected, the VM pins of each protection chip are also electrically connected with a voltage measurer, the negative electrode of the voltage measurer is electrically connected with the positive electrode of the lithium battery pack, AND the positive electrode of the voltage measurer is electrically connected with the negative electrode of the lithium battery pack.
The application provides a lithium battery pack charge saturation equalization circuit carries out voltage measurement to every battery monomer, controls to turn off the corresponding charging circuit through corresponding protection chip and MOS pipe after the battery monomer charges saturation, then carries out equalization circuit through protection chip and the positive and negative MOS pipe Q1/Q2 of lithium battery pack, distributes voltage to the battery monomer of low voltage, charges, and the equalization effect of circuit is good, prolongs the life of lithium battery pack.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. Lithium battery pack charge saturation equalization circuit, its characterized in that, lithium battery pack includes a plurality of lithium cell monomer of establishing ties, and the free negative pole of every lithium cell is all electric respectively to be connected the S utmost point of a MOS pipe, the output of a NOT door is all connected to the G utmost point electricity of MOS pipe, a resistance R is all connected to the d utmost point electricity of MOS pipe S Each battery cell is coupled with oneAnd the protection chip is of the model S-8241.
2. The lithium battery pack charge saturation equalization circuit according to claim 1, wherein the VDD pin and the VSS pin of the protection chip are electrically connected to a voltage measurer, respectively, the positive electrode of the voltage measurer is electrically connected to the positive electrode of the corresponding battery cell, and the negative electrode of the voltage measurer is electrically connected to the negative electrode of the corresponding battery cell.
3. The lithium battery pack charge saturation equalization circuit according to claim 2, wherein said resistor R S And the input end of the NOT gate is electrically connected with a CO pin of the corresponding protection chip.
4. The lithium battery pack charge saturation equalization circuit of claim 3, wherein the positive electrode of the lithium battery pack is electrically connected to a series of R L And R is M The electrode is electrically connected with the electrode S of a MOS tube Q2, the electrode S of a MOS tube Q1 is electrically connected with the electrode D of the MOS tube Q2, the electrode D of the MOS tube Q2 is electrically connected with the electrode D of the MOS tube Q1, the electrode g of the MOS tube Q1 is electrically connected with the output end of an OR gate, AND the electrode g of the MOS tube Q2 is electrically connected with the output end of an AND gate.
5. The charge saturation equalization circuit of a lithium battery pack of claim 4, wherein the input of the OR gate is electrically connected to the CO pin of each of the protection chips, the input of the AND gate is electrically connected to the DO pin of each of the protection chips, the VM pins between each of the protection chips are electrically connected, AND the VM pins of each of the protection chips are further electrically connected to a voltage measurer, the negative electrode of the voltage measurer is electrically connected to the positive electrode of the lithium battery pack, AND the positive electrode of the voltage measurer is electrically connected to the negative electrode of the lithium battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322012482.XU CN220358853U (en) | 2023-07-28 | 2023-07-28 | Lithium battery pack charging saturation equalization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322012482.XU CN220358853U (en) | 2023-07-28 | 2023-07-28 | Lithium battery pack charging saturation equalization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220358853U true CN220358853U (en) | 2024-01-16 |
Family
ID=89506059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322012482.XU Active CN220358853U (en) | 2023-07-28 | 2023-07-28 | Lithium battery pack charging saturation equalization circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220358853U (en) |
-
2023
- 2023-07-28 CN CN202322012482.XU patent/CN220358853U/en active Active
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