CN219659458U - Battery rapid voltage equalization circuit and electronic equipment - Google Patents
Battery rapid voltage equalization circuit and electronic equipment Download PDFInfo
- Publication number
- CN219659458U CN219659458U CN202320987983.7U CN202320987983U CN219659458U CN 219659458 U CN219659458 U CN 219659458U CN 202320987983 U CN202320987983 U CN 202320987983U CN 219659458 U CN219659458 U CN 219659458U
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- battery
- voltage
- control chip
- module
- pin
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- 238000004146 energy storage Methods 0.000 claims abstract description 23
- 230000003750 conditioning effect Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 11
- 230000008878 coupling Effects 0.000 claims description 4
- 238000010168 coupling process Methods 0.000 claims description 4
- 238000005859 coupling reaction Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical group [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process 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
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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a battery rapid voltage equalization circuit and electronic equipment, which comprise a plurality of groups of voltage equalization units, wherein each voltage equalization unit comprises a control chip and an energy storage equalization module, a first voltage pin of the control chip is connected with the positive electrode of a first single battery, a second voltage pin of the control chip is connected with the common end of the first single battery and a second single battery, a third voltage pin of the control chip is connected with the negative electrode of the second single battery, one end of the energy storage equalization module is connected with a switch pin of the control chip, and the other end of the energy storage equalization module is connected with the common end of the first single battery and the common end of the second single battery, wherein the first single battery and the second single battery are connected in series. According to the utility model, the control chip and the energy storage balancing module are used for balancing the voltages of two adjacent single batteries in the power battery pack, so that the voltages of all the single batteries in the power battery pack are balanced and consistent, and the damage of the batteries is avoided.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a battery rapid voltage equalization circuit and electronic equipment.
Background
For the single battery, the manufacturing and using processes are different, and the differences can lead to the inconsistency of the single battery, wherein the inconsistency is mainly reflected in the aspects of capacity, internal resistance, self-discharge rate, replay electric efficiency and the like of the single battery, and the inconsistency of the single battery can lead to the loss of the capacity of the power battery pack in the power battery pack, so that the service life of the battery pack is reduced. The battery pack is easy to overcharge when the battery pack is charged due to individual differences among the batteries, and easy to overdischarge when the battery pack is discharged, and the battery pack is less likely to enter a vicious circle due to damage of the battery pack with the minimum capacity. The performance of the single battery directly affects the charge and discharge characteristics of the whole battery, so that the capacity of the battery is reduced. Therefore, voltage equalization between the unit cells is important, and a technical scheme capable of keeping the voltage of the unit cells uniform is necessary.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model aims to provide a battery rapid voltage equalization circuit.
In order to achieve the above purpose, the specific technical scheme adopted by the utility model is as follows:
the utility model provides a quick voltage equalization circuit of battery, includes multiunit voltage equalization unit, every voltage equalization unit all includes control chip and energy storage equalization module, the positive pole of first battery cell is connected to control chip's first voltage pin, control chip's second voltage pin is connected the public end of first battery cell and second battery cell, control chip's third voltage pin is connected the negative pole of second battery cell, energy storage equalization module's one end with control chip's switch pin is connected, the other end with first battery cell with the public end of second battery cell is connected, wherein, first battery cell with second battery cell establishes ties.
Further, the energy storage equalization module comprises a power inductor.
Further, the voltage equalization unit further comprises a current detection resistor, and the energy storage equalization module is connected with the switch pin of the control chip through the current detection resistor.
Further, the voltage balancing unit further comprises a first current limiting resistor, and the second voltage pin of the control chip is connected with the common end of the first single battery and the common end of the second single battery through the first current limiting resistor.
Further, the voltage equalization unit further comprises a second current limiting resistor, one end of the second current limiting resistor is connected with the energy storage equalization module, and the other end of the second current limiting resistor is connected with an overcurrent detection pin of the control chip.
Further, a coupling capacitor is connected between the first voltage pin and the third voltage pin of the control chip.
Further, the control chip comprises a first analog signal conditioning module, a processor module, a second analog signal conditioning module and a driving module, wherein the processor module is respectively connected with the first analog signal conditioning module, the second analog signal conditioning module and the driving module.
The utility model also provides electronic equipment comprising the battery rapid voltage equalization circuit.
The utility model has the beneficial effects that: the control chip and the energy storage balancing module are used for balancing the voltages of two adjacent single batteries in the power battery pack, so that the voltages among the single batteries in the power battery pack are balanced and consistent, and the damage of the batteries is avoided.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a battery fast voltage equalization circuit according to an embodiment of the present utility model;
fig. 2 is a schematic circuit diagram of the control chip in fig. 1 according to an embodiment of the present utility model.
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. Based on the embodiments of the present utility model, other embodiments that may be obtained by those of ordinary skill in the art without making any inventive effort are within the scope of the present utility model.
In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "vertical", "upper", "lower", "horizontal", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
As shown in fig. 1, a battery rapid voltage equalization circuit comprises a plurality of groups of voltage equalization units, each voltage equalization unit comprises a control chip and an energy storage equalization module, a first voltage pin of the control chip is connected with the positive electrode of a first single battery, a second voltage pin of the control chip is connected with the public end of the first single battery and a second single battery, a third voltage pin of the control chip is connected with the negative electrode of the second single battery, one end of the energy storage equalization module is connected with a switch pin of the control chip, and the other end of the energy storage equalization module is connected with the public end of the first single battery and the public end of the second single battery, wherein the first single battery and the second single battery are connected in series.
Specifically, the control chip refers to a chip U1 and a chip U2 … … in fig. 1, in which a chip Un, BT1 … … BT (n+1) is a single battery, and VPP to GND are voltage differences after multiple single batteries are connected in series. The single battery is a lithium ion battery, the first voltage pin is BATP, the second voltage pin is BATC, and the third voltage pin is BATN.
It can be understood that the voltage equalization is carried out on two adjacent single batteries in the power battery pack through the control chip and the energy storage equalization module, so that the voltage equalization among all the single batteries in the power battery pack is consistent, the battery is prevented from being damaged, and each two adjacent single batteries use one set of circuit for voltage equalization. To improve battery utilization and cycle life.
Further, the energy storage equalization module includes a power inductor, and specifically, the power inductor is L1 … … Ln.
Further, the voltage equalization unit further comprises a current detection resistor, and the energy storage equalization module is connected with the switch pin of the control chip through the current detection resistor, and specifically, the current detection resistor is R13 … … Rn3.
Further, the voltage balancing unit further comprises a first current limiting resistor, and the second voltage pin of the control chip is connected with the common end of the first single battery and the common end of the second single battery through the first current limiting resistor. Specifically, the first current limiting resistor is R11 … … Rn1.
Further, the voltage equalization unit further comprises a second current limiting resistor, one end of the second current limiting resistor is connected with the energy storage equalization module, and the other end of the second current limiting resistor is connected with an overcurrent detection pin of the control chip. Specifically, the second current limiting resistor is R12 … … Rn2.
Further, a coupling capacitor is connected between the first voltage pin and the third voltage pin of the control chip. Specifically, the coupling capacitance is C1 … … Cn.
The working principle of the voltage equalization unit is illustrated below with one embodiment:
assuming that the chip U1 detects that the voltage of the battery BT1 is higher than the battery BT2, the start SW outputs a PWM waveform. In one PWM cycle, the first half-cycle transfers a portion of the energy of battery BT1 into inductor L1 and the second half-cycle transfers the energy in inductor L1 into battery BT 2. In the fast PWM operation, the energy of the battery BT1 is transferred to the battery BT2, and the voltages of both batteries are detected in real time, and the SW output is stopped once the voltages are the same.
Wherein the two ends of BATP and BATC of U1 are high-order battery cell voltage U BT1 The two ends of BATC and BATN are low-level battery cell voltage U BT2 U1 is according to U BT1 And U BT2 The voltage difference of the battery is adjusted to adjust the duty ratio of the output PWM, so that the transferred energy is larger when the voltage difference of the battery is larger; when the battery voltage difference is small, the transferred energy is also small.
In addition, the chip U1 also detects current through the ISET pin to provide overcurrent protection, and limits the PWM maximum duty ratio output by the SW according to the voltage signal on the current detection resistor R3.
Fig. 2 is a schematic circuit diagram of the control chip in fig. 1 provided by the embodiment of the present utility model, as shown in fig. 2, where the control chip includes a first analog signal conditioning module, a processor module, a second analog signal conditioning module, and a driving module, and the processor module is connected to the first analog signal conditioning module, the second analog signal conditioning module, and the driving module, respectively.
The first analog signal conditioning module is N1, the processor module is N3, the second analog signal conditioning module is N2, and the driving module is N4. N1 is an analog signal conditioning circuit for detecting the voltage U between BATP and BATC in real time BT1 Voltage U between BATC and BATN BT2 According to U BT1 And U BT2 Outputs a PWM digital signal to N3. N2 is an analog signal conditioning circuit, which detects the voltage between ISET and SW in real time and outputs logic according to the voltageSignal to N3. N3 is output to the corresponding MOSFET through the N4 driving circuit according to the PWM signal provided by N1. N3 limits the output PWM maximum duty cycle according to the logic signal provided by N2, and further limits the output PWM maximum duty cycle of N4 and the corresponding MOSFET.
The utility model also provides electronic equipment comprising the battery rapid voltage equalization circuit.
The utility model has the beneficial effects that: the control chip and the energy storage balancing module are used for balancing the voltages of two adjacent single batteries in the power battery pack, so that the voltages among the single batteries in the power battery pack are balanced and consistent, and the damage of the batteries is avoided.
With the above description of the preferred embodiments according to the present utility model as a teaching, those skilled in the art can make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of the claims.
Claims (8)
1. The utility model provides a quick voltage equalization circuit of battery, its characterized in that includes multiunit voltage equalization unit, every voltage equalization unit all includes control chip and energy storage equalization module, the positive pole of first battery cell is connected to control chip's first voltage pin, control chip's second voltage pin is connected the public end of first battery cell and second battery cell, control chip's third voltage pin is connected the negative pole of second battery cell, energy storage equalization module's one end with control chip's switch pin is connected, the other end with first battery cell with the public end of second battery cell is connected, wherein, first battery cell with the second battery cell is established ties.
2. The battery fast voltage equalization circuit of claim 1, wherein said energy storage equalization module comprises a power inductor.
3. The battery rapid voltage equalization circuit of claim 2, wherein the voltage equalization unit further comprises a current detection resistor, and the energy storage equalization module is connected with the switch pin of the control chip through the current detection resistor.
4. The battery rapid voltage equalization circuit of claim 1, wherein the voltage equalization unit further comprises a first current limiting resistor, and the second voltage pin of the control chip is connected to a common terminal of the first single battery and the second single battery through the first current limiting resistor.
5. The rapid battery voltage equalization circuit of claim 1, wherein the voltage equalization unit further comprises a second current limiting resistor, one end of the second current limiting resistor is connected with the energy storage equalization module, and the other end of the second current limiting resistor is connected with an overcurrent detection pin of the control chip.
6. The battery rapid voltage equalization circuit of claim 1, wherein a coupling capacitor is connected between the first voltage pin and the third voltage pin of the control chip.
7. The rapid battery voltage equalization circuit of claim 1, wherein the control chip comprises a first analog signal conditioning module, a processor module, a second analog signal conditioning module, and a driving module, wherein the processor module is respectively connected with the first analog signal conditioning module, the second analog signal conditioning module, and the driving module.
8. An electronic device comprising the battery fast voltage equalization circuit of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320987983.7U CN219659458U (en) | 2023-04-27 | 2023-04-27 | Battery rapid voltage equalization circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320987983.7U CN219659458U (en) | 2023-04-27 | 2023-04-27 | Battery rapid voltage equalization circuit and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219659458U true CN219659458U (en) | 2023-09-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320987983.7U Active CN219659458U (en) | 2023-04-27 | 2023-04-27 | Battery rapid voltage equalization circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219659458U (en) |
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2023
- 2023-04-27 CN CN202320987983.7U patent/CN219659458U/en active Active
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Address after: 518000, Building 304, Tsinghua Information Port, No.1 Xindong Road, Songpingshan Community, Xili Street, Nanshan District, Shenzhen, Guangdong Province Patentee after: Shenzhen Jizhi New Energy Technology Co.,Ltd. Country or region after: China Address before: Room 313, 3rd Floor, Tsinghua Information Port Complex Building, No.1 Xindong Road, Xili Street, Nanshan District, Shenzhen City, Guangdong Province, 518000 Patentee before: Shenzhen Jizhi Electric Technology Co.,Ltd. Country or region before: China |