CN111916857A - Effective discrete charging method for storage battery pack - Google Patents
Effective discrete charging method for storage battery pack Download PDFInfo
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- CN111916857A CN111916857A CN202010828370.XA CN202010828370A CN111916857A CN 111916857 A CN111916857 A CN 111916857A CN 202010828370 A CN202010828370 A CN 202010828370A CN 111916857 A CN111916857 A CN 111916857A
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- Prior art keywords
- storage battery
- charging
- battery pack
- monomer
- battery
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000178 monomer Substances 0.000 claims abstract description 19
- 230000000694 effects Effects 0.000 claims abstract description 14
- 230000005611 electricity Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
- H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an effective discrete charging method for a storage battery pack, and relates to the technical field of storage battery pack charging. The effective discrete charging method for the storage battery pack comprises the following steps: charging the storage battery pack by using an effective discrete charging device; the inside a plurality of switching power supply circuit that is provided with of the discrete charging device of actual effect, the discrete charging device of actual effect passes through charging wire and storage battery electric connection, the parallelly connected electric connection of monomer battery or monomer battery parallel layer in switching power supply circuit and the storage battery, the charging voltage and the charging current on every monomer battery or monomer battery parallel layer of independent regulation during charging reach the purpose of carrying out the independent charging of actual effect to every monomer battery or monomer battery parallel layer, solved current storage battery and adopted the wholeness method of charging for storage battery's actual life is less than monomer battery electricity core life far away, causes the extravagant and expense with high costs problem of material.
Description
Technical Field
The invention relates to the technical field of storage battery pack charging, in particular to an effective discrete charging method for a storage battery pack.
Background
Single storage battery: also known in the industry as a cell, the basic unit device that directly converts chemical energy into electrical energy, includes electrodes, a separator, an electrolyte, a housing, and terminals, and is designed to be rechargeable. A storage battery pack: more than one single storage battery (battery cell) is combined in a series connection, parallel connection or series-parallel connection mode, and only one pair of positive and negative output terminals are used as a combined body of a power supply. Service life of the storage battery: the service life of the single storage battery or the storage battery pack is measured by the number of times of full charge and full discharge, and is counted once in one deep charge-discharge cycle.
The storage battery is widely applied to various electronic fields: the portable electric heating flashlight is commonly used for high-grade highlight flashlights, portable power supplies, wireless data transmitters, electric heating warm-keeping clothes, shoes, portable instruments and meters, portable lighting equipment, portable printers, industrial instruments, medical instruments and the like.
The voltage and capacity of the single storage battery (battery cell) can not meet the power requirements of equipment on voltage and current in many occasions, so that a plurality of single storage batteries (battery cells) need to be combined in a series-parallel connection mode to supply power to the equipment. For example, a power battery pack of a new energy automobile, fig. 1 is a schematic diagram of a power battery pack used by a tesla certain type of new energy electric vehicle, and the power battery pack is formed by connecting 74 single lithium storage batteries in parallel to form a layer and connecting up to 96 battery layers in series.
In the prior art and products, when a storage battery pack is charged, the storage battery pack is taken as a super-large single storage battery to be charged integrally, the charging principle is shown in fig. 2, and each battery symbol in the drawing represents a single storage battery (battery cell) or a parallel battery layer consisting of a plurality of single storage batteries (battery cells).
The existing storage battery pack charging product adopts an integral charging method, and the constant over-charging or under-charging of each battery cell or a parallel layer in the storage battery pack is inevitable, so that the actual service life of the storage battery pack is far shorter than that of a single storage battery (battery cell) and is less than one third of the service life of the battery cell.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an effective discrete charging method for a storage battery pack, and solves the problems of material waste and high cost caused by the fact that the actual service life of the storage battery pack is far shorter than the service life of a single storage battery cell because the storage battery pack adopts an integral charging method.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an effective discrete charging method for a storage battery pack comprises the following steps: charging the storage battery pack by using an effective discrete charging device, and independently adjusting the charging voltage and the charging current of each single storage battery or the parallel layer of the single storage batteries in the storage battery pack during charging; the utility model discloses a charging device is including setting up a plurality of switch power supply circuit, the inside charging device that stands separately of effect passes through charging wire and storage battery electric connection, storage battery is including the monomer battery or the parallelly connected layer of monomer battery of establishing ties each other, switch power supply circuit passes through the parallelly connected electric connection of wire with the outside on the parallelly connected layer of monomer battery or monomer battery, independently adjusts the charging voltage and the charging current on every monomer battery or the parallelly connected layer of monomer battery during charging, reaches and carries out the purpose that the independent charging of effect nature is carried out to every monomer battery or the parallelly connected layer of monomer battery.
Advantageous effects
The invention provides an effective discrete charging method for a storage battery pack. The method has the following beneficial effects:
the actual effect discrete charging method of the storage battery pack achieves the purpose of substantially independently charging each battery cell or the parallel layer by connecting each battery cell or the parallel layer in parallel with a switching power supply circuit, independently adjusting the charging voltage and the charging current of each battery cell or the parallel layer, and ensures that each battery cell in the storage battery pack is not undercharged or overcharged due to the fact that the actual effect discrete charging method can achieve independent charging of each battery cell in the storage battery pack, so that the service life of the storage battery pack is multiplied and is equal to the service life of a single storage battery (battery cell).
Drawings
FIG. 1 is a schematic diagram of a Tesla certain type power battery pack;
FIG. 2 is a schematic diagram of the prior art and product charging principles;
fig. 3 is a schematic diagram of the principle of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The existing storage battery pack charging product adopts an integral charging method, and the constant over-charging or under-charging of each battery cell or a parallel layer in the storage battery pack is inevitable, so that the actual service life of the storage battery pack is far shorter than that of a single storage battery (battery cell) and is less than one third of the service life of the battery cell. The detailed reasons are explained as follows:
the single storage batteries (electric cores) in the storage battery set have differences in the aspects of capacity, internal resistance, voltage, discharge curve and the like, so that the electric quantity released by each electric core or the parallel layer in the discharge process is inconsistent. The battery cell or the parallel layer with large electric quantity is released, the residual capacity is small, and the residual voltage is low; the residual capacity with less released electric quantity is large, and the residual voltage is high.
When the existing integral charging method is used for charging the storage battery pack, the charging current I (shown in fig. 2) flowing through each battery cell or parallel layer connected in series is the same, the charging voltage Ui (shown in fig. 2) of each battery cell or parallel layer is related to the residual voltage after the battery cells or parallel layers are respectively discharged, the residual voltage is high, the charging voltage Ui is high, and the residual voltage is low, and the charging voltage Ui is low.
The electric quantity charged by the storage battery is equal to 'voltage x current x time', and a cell or a parallel layer with high residual capacity needs to be charged less, but the charged electric quantity is too much due to high charging voltage, so that overcharging is caused; the cell or the parallel layer having a low residual capacity is originally charged more, but the charged amount of electricity is rather small due to the low charging voltage, resulting in an under-charge.
The overcharge of the storage battery can cause the structural change of the anode material to cause capacity loss, the decomposition and oxygen release of the storage battery can have violent chemical reaction with the electrolyte, and the worst result is explosion naturally. If the battery is overcharged frequently, excessive gas is generated in the battery, so that the internal pressure of the battery is increased to cause a bulging phenomenon. The internal pressure of the storage battery is increased due to the undercharge of the storage battery, and the reversibility of positive and negative active substances is damaged, so that the capacity is obviously attenuated. The service life of the battery can be greatly influenced by over-charging or under-charging of the storage battery, and the actual service life of the storage battery pack is far shorter than that of a single storage battery (battery cell) and is less than one third of the service life of the battery cell.
Referring to fig. 1-3, the present invention provides a technical solution: an effective discrete charging method for a storage battery pack comprises the following steps: charging the storage battery pack by using an effective discrete charging device; the inside a plurality of switching power supply circuits that are provided with of the actual effect discrete charging device, the actual effect discrete charging device is electrically connected with the storage battery pack through a charging wire, the storage battery pack comprises single storage batteries or single storage battery parallel layers which are connected in series, the switching power supply circuits are electrically connected with the single storage batteries or the outer parts of the single storage battery parallel layers in parallel through wires in parallel, the charging voltage and the charging current of each single storage battery or each single storage battery parallel layer are independently adjusted during charging, the purpose of actual effect independent charging of each single storage battery or each single storage battery parallel layer is achieved, the independent charging of each electric core in the storage battery pack can be realized through the actual effect discrete charging method, the situation that the electric core is not under-charged or over-charged is guaranteed, the service life of the storage battery pack is prolonged in multiples, and the service life of the.
The comparison between the actual discrete charging method and the integral charging method adopted by the storage battery pack is shown in the following table:
it is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. An effective discrete charging method for a storage battery pack is characterized by comprising the following steps:
charging the storage battery pack by using an effective discrete charging device, and independently adjusting the charging voltage and the charging current of each single storage battery or the parallel layer of the single storage batteries in the storage battery pack during charging;
the utility model discloses a storage battery is including setting up a plurality of discrete charging device in the real effect, the discrete charging device of real effect passes through charging wire and storage battery electric connection, storage battery includes the monomer battery or the parallelly connected layer of monomer battery of establishing ties each other, the parallelly connected electric connection of wire is passed through to switching power supply circuit and monomer battery or the outside on the parallelly connected layer of monomer battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828370.XA CN111916857A (en) | 2020-08-18 | 2020-08-18 | Effective discrete charging method for storage battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010828370.XA CN111916857A (en) | 2020-08-18 | 2020-08-18 | Effective discrete charging method for storage battery pack |
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| Publication Number | Publication Date |
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| CN111916857A true CN111916857A (en) | 2020-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010828370.XA Pending CN111916857A (en) | 2020-08-18 | 2020-08-18 | Effective discrete charging method for storage battery pack |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178624A (en) * | 2021-03-03 | 2021-07-27 | 安徽力普拉斯电源技术有限公司 | High-consistency matching method for power batteries for electric road vehicles |
-
2020
- 2020-08-18 CN CN202010828370.XA patent/CN111916857A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113178624A (en) * | 2021-03-03 | 2021-07-27 | 安徽力普拉斯电源技术有限公司 | High-consistency matching method for power batteries for electric road vehicles |
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Application publication date: 20201110 |