CN218976374U - Voltage equalization circuit for energy storage system - Google Patents
Voltage equalization circuit for energy storage system Download PDFInfo
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- CN218976374U CN218976374U CN202223158376.4U CN202223158376U CN218976374U CN 218976374 U CN218976374 U CN 218976374U CN 202223158376 U CN202223158376 U CN 202223158376U CN 218976374 U CN218976374 U CN 218976374U
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- energy storage
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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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Abstract
The utility model discloses a voltage equalization circuit for an energy storage system, which comprises a plurality of energy storage units, wherein the plurality of energy storage units are mutually connected in series to externally supply energy, and the independent energy storage units are connected in parallel with independent voltage release circuits, wherein the voltage release circuits comprise power diodes and mos tubes; the set voltage of the mos tube is equal to the standard discharge voltage of the energy storage unit. The voltage release circuit can consume a large amount of power in a short time, so that the reduction of the battery voltage difference is accelerated, the overdischarge of a hardware level is realized, and the stability and the safety are far higher than those of the existing battery voltage stabilizing structure.
Description
Technical Field
The utility model relates to a voltage equalization circuit for an energy storage system.
Background
The electrochemical energy storage device is used as a common energy storage structure, and the structural basis is that a plurality of independent energy storage units are connected in series and in parallel, so that more stable current and voltage levels are output to the outside.
In order to ensure the stability of external energy supply output, the existing device regulates the voltage of the energy storage units with inconsistent use conditions through the voltage regulating circuit, and obtains the power transmission circuit with the differential voltage within a safe range.
However, the existing voltage regulation mode controls the starting or closing of the discharge circuit through real-time voltage measurement, and regulates the voltage through a power component in the discharge circuit, the existing power component is often a resistor, and the circuit structure has a good use effect in a low-density energy storage device, but in a high-density energy storage device, the generated heat and the complexity of the system often bring other potential safety hazards.
In this regard, the developer is more inclined to optimize at the algorithm end, so as to solve the problem, and the problem existing in the hardware layer is solved through a more intelligent algorithm, but the method is not beneficial to the maintenance of the high service life of the equipment and the stable operation of the equipment.
For example, in some high-density application scenarios, errors caused by algorithms are often generated, so that unnecessary functional modules are operated in error, an energy storage unit is over-discharged, potential safety hazards are caused, and the service life of hardware is shortened sharply.
Disclosure of Invention
The utility model aims to solve the defects in the prior art and provides a voltage equalization circuit for an energy storage system.
The voltage equalization circuit is applied to high-density energy storage systems, such as large-scale energy storage clusters for household, commercial and industrial use, vehicle-mounted energy storage and other fields requiring large-scale dense energy storage.
On the basis of the compact energy storage system, a plurality of energy storage units are mutually connected in series to supply energy to the outside, and on the basis, a voltage releasing circuit is connected in parallel to the side face of each energy storage unit, so that a voltage balancing circuit of the energy storage system is formed.
The voltage equalization circuit at least comprises a power diode and a mos tube, wherein the set voltage of the mos tube is equal to the standard discharge voltage of the energy storage unit.
The defect of poor energy conversion efficiency of the power diode is utilized, the problem that excessive energy in the field needs to be consumed in time can be solved, and the common voltage 3v of the energy storage unit is used for example by setting the conducting voltage of the mos tube as the standard discharging voltage of the energy storage unit:
the side face of the 3v energy storage unit is connected with a voltage-releasing circuit in parallel, wherein the positive electrode of the energy storage unit is connected with the power diode, the resistor, the mos tube and the negative electrode of the energy storage unit in sequence. The power type diode can be a power type LED light source. In the use process, when the instantaneous voltage of the energy storage unit is greater than 3v, the power type LED light source is conducted, so that energy is discharged, larger power is consumed, the rapid voltage reduction of the abnormal energy storage unit is accelerated, and if a voltage reduction circuit is not externally connected, the abnormal energy storage unit can be reduced to normal voltage after being slowly discharged, but a certain hidden danger exists.
The external power type LED light source is adopted, energy can be quickly released, so that the reduction of the pressure difference of the energy storage unit is accelerated, and when the voltage of the energy storage unit is reduced to 3v or below, the voltage is lower than 3v, and at the moment, the voltage release circuit cannot be conducted, which is equivalent to automatic disconnection, so that the overdischarge of the energy storage unit caused by algorithm errors is avoided.
Furthermore, the energy storage unit is externally powered through series supercharging, and the energy storage unit is a lead-mercury storage battery or a lithium battery.
The beneficial effects are that:
the energy storage unit that this application can take place to current energy storage system hardware layer produces the problem of pressure differential, through external voltage-releasing circuit to including the form of power type diode and mos pipe in the design voltage-releasing circuit, both utilized the poor characteristics of power type diode energy conversion efficiency, again utilized the controllable characteristics of mos pipe break-make voltage, thereby accomplish the selection of break-make at appointed voltage value, and do not need external detection circuit.
Meanwhile, the voltage release circuit can consume a large amount of power in a short time, so that the reduction of the battery voltage difference is accelerated, the overdischarge of a hardware level is realized, and the stability and the safety are far higher than those of the existing battery voltage stabilizing structure.
Drawings
FIG. 1 is a schematic diagram of a connection of a voltage equalization circuit of an energy storage system;
fig. 2 is a schematic diagram of a conventional voltage release circuit.
Detailed Description
The present utility model will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present utility model, which examples are provided for the purpose of illustrating the present utility model only and are not to be construed as limiting the scope of the present utility model.
As shown in fig. 1, the energy storage system comprises a plurality of energy storage units, wherein the plurality of energy storage units are mutually connected in series to supply energy to the outside, and the independent energy storage units are connected in parallel with independent voltage release circuits, and the voltage release circuits comprise power diodes and mos tubes; the set voltage of the mos tube is equal to the standard discharge voltage of the energy storage unit.
When the instantaneous voltage of the energy storage unit is greater than 3v, the discharge circuit is conducted, the power diode is electrified, and redundant electric energy is rapidly released, the release form can be selected from various forms such as light, sound and the like, and a thermal form is not generally adopted, so that the damage of the energy storage device caused by local overheating is prevented, but the thermal form can also be adopted for energy conversion under certain special application scenes, such as an ultralow-temperature environment.
Meanwhile, compared with the existing discharging circuit shown in fig. 2, the voltage equalizing circuit shown in fig. 1 has the characteristics of high stability and no algorithm basis, and can effectively improve the service life level of the whole energy storage system.
The chip and the energy storage unit can be protected from the hardware level in the form shown in the figure 1, so that the phenomenon that the energy storage unit is excessively discharged or overheated is prevented, and mechanical faults and potential safety hazards caused by algorithm faults are avoided. And although the cost is possibly slightly increased, the use safety and the convenience are improved to a certain extent.
The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.
Claims (5)
1. The voltage equalization circuit for the energy storage system comprises a plurality of energy storage units, and is characterized in that the energy storage units are mutually connected in series to supply energy to the outside, and the independent energy storage units are connected in parallel with independent voltage release circuits, wherein the voltage release circuits comprise power diodes and mos tubes; the set voltage of the mos tube is equal to the standard discharge voltage of the energy storage unit.
2. A voltage equalization circuit for an energy storage system as defined in claim 1 wherein at least one resistor block is coupled to the discharge circuit.
3. The voltage equalization circuit for an energy storage system of claim 1, wherein the energy storage system comprises a plurality of groups of energy storage units connected in series, the standard voltage value of the energy storage units is 3v, and the positive electrode of the energy storage units is sequentially connected with the power diode, the resistor, the mos tube and the negative electrode of the energy storage units.
4. The voltage equalization circuit for an energy storage system of claim 1, wherein said power diode is a power LED light source.
5. The voltage equalization circuit for an energy storage system of claim 1, wherein said energy storage unit is a lead-mercury battery or a lithium battery, and wherein said energy storage unit is externally powered by series boosting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223158376.4U CN218976374U (en) | 2022-11-28 | 2022-11-28 | Voltage equalization circuit for energy storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223158376.4U CN218976374U (en) | 2022-11-28 | 2022-11-28 | Voltage equalization circuit for energy storage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218976374U true CN218976374U (en) | 2023-05-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223158376.4U Active CN218976374U (en) | 2022-11-28 | 2022-11-28 | Voltage equalization circuit for energy storage system |
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| Country | Link |
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| CN (1) | CN218976374U (en) |
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2022
- 2022-11-28 CN CN202223158376.4U patent/CN218976374U/en active Active
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