CN116111193A - Power energy storage battery matching process method and battery pack - Google Patents
Power energy storage battery matching process method and battery pack Download PDFInfo
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- CN116111193A CN116111193A CN202211462055.5A CN202211462055A CN116111193A CN 116111193 A CN116111193 A CN 116111193A CN 202211462055 A CN202211462055 A CN 202211462055A CN 116111193 A CN116111193 A CN 116111193A
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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
- H01M10/058—Construction or manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
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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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
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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
Abstract
The invention is applicable to the technical field of battery technology, and provides a process method for matching power energy storage batteries and a battery pack, wherein the process method comprises the following steps: after the multiple battery cores to be assembled are respectively subjected to constant-current constant-voltage charge and constant-current discharge, the capacities of the multiple battery cores to be assembled are collected; grouping the plurality of battery cores to be assembled according to the capacities of the plurality of battery cores to be assembled to obtain a plurality of first battery packs; and matching each to-be-matched battery cell according to the electrical performance parameters of each to-be-matched battery cell in the first battery pack to obtain a plurality of target battery packs. According to the scheme, the consistency of the battery cells is improved by matching the battery cells in multiple dimensions, so that the electrical parameters of each battery cell in each battery pack tend to be consistent. According to the scheme, the battery packs are assembled according to the constant-current charging time and the discharging average voltage of each battery cell to be assembled, so that a plurality of target battery packs are obtained, the voltage difference between the battery cells is further reduced, and the service life of the battery packs is prolonged.
Description
Technical Field
The invention belongs to the technical field of battery technology, and particularly relates to a power energy storage battery matching technology method and a battery pack.
Background
Because the characteristics of the same batch of batteries may have certain differences in the production process of the battery cells, a plurality of battery cells need to be divided into capacity and matched. The capacity division refers to classification according to actual calibration capacity differences of the battery cells. The battery pack is to classify and combine a plurality of battery cells into battery packs, wherein the electric parameters of each battery cell in each battery pack are required to be ensured to be consistent. After the capacity of the battery cells is divided (the capacity of the battery cells is classified according to the capacity of the battery cells), the plurality of battery cells with the same battery cell capacity level are subjected to constant-current constant-voltage charging to a preset voltage by the traditional matching process, and then the battery is matched according to the battery cell voltage corresponding to each battery cell and other electrical parameters.
However, the battery pack obtained by the conventional assembly process has a relatively long service life due to an excessive voltage difference between each cell, which is a technical problem to be solved.
Disclosure of Invention
In view of the above, the embodiment of the invention provides a process method for assembling a power energy storage battery and the battery pack, so as to solve the technical problem of lower service life of the battery pack caused by overlarge voltage difference of each battery core in the battery pack obtained by the traditional assembling process.
A first aspect of an embodiment of the present invention provides a process method for assembling a power energy storage battery, where the process method includes:
after a plurality of battery cores to be assembled are respectively subjected to constant-current constant-voltage charge and constant-current discharge, the capacities of the plurality of battery cores to be assembled are collected;
grouping the plurality of battery cores to be assembled according to the capacities of the plurality of battery cores to be assembled to obtain a plurality of first battery packs;
and matching each to-be-matched battery cell according to the electrical performance parameters of each to-be-matched battery cell in the first battery pack to obtain a plurality of target battery packs, wherein the electrical performance parameters comprise constant current charging time or discharge average voltage.
Further, the step of collecting the capacities of the plurality of battery cells to be assembled after the plurality of battery cells to be assembled are respectively subjected to constant-current constant-voltage charging and constant-current discharging includes:
constant-current discharging is carried out on the plurality of battery cores to be assembled until the electric quantity is exhausted;
constant-current and constant-voltage charging is carried out on the plurality of battery cores to be assembled to a full-charge state;
and performing constant-current discharge on the plurality of battery cells to be assembled within a preset time period, and collecting the capacities of the plurality of battery cells to be assembled.
Further, the step of grouping each to-be-grouped battery cell according to the electrical performance parameter of each to-be-grouped battery cell in the battery pack to obtain a plurality of target battery packs includes:
and matching each battery cell to be matched according to the voltage, the internal resistance, the K value, the constant-current charging time and the discharging average voltage of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the constant-current charging time refers to the time required for charging the battery cell to be matched from 0 electric quantity to a constant voltage point.
Further, the step of matching each to-be-matched battery cell according to the voltage, the internal resistance, the K value, the constant current charging time and the discharging average voltage of each to-be-matched battery cell in the battery pack to obtain a plurality of target battery packs includes:
according to the voltages of the plurality of battery cores to be assembled in the first battery pack, arranging the plurality of battery cores to be assembled from high to low, and orderly forming a first battery core group to be assembled;
dividing the first battery cell group to be assembled in equal parts to obtain a plurality of second battery packs;
arranging a plurality of to-be-assembled battery cells from high to low according to the internal resistance of each to-be-assembled battery cell in the second battery pack to obtain an ordered second to-be-assembled battery cell group;
dividing the second to-be-assembled battery cell group in equal parts to obtain a plurality of third battery packs;
arranging a plurality of to-be-assembled battery cells from high to low according to the K value in each third battery pack to obtain an ordered third to-be-assembled battery cell group;
dividing the third to-be-assembled battery cell group in equal parts to obtain a plurality of fourth battery packs;
arranging a plurality of to-be-assembled battery cells from high to low according to the constant current charging time to obtain ordered fourth to-be-assembled battery cell groups;
and dividing the fourth to-be-assembled battery cell group in equal parts to obtain a plurality of target battery packs.
Further, the step of grouping each to-be-grouped battery cell according to the voltage, the internal resistance, the K value and the constant current charging time of each to-be-grouped battery cell in the battery pack includes:
respectively acquiring a plurality of interval ranges corresponding to the voltage, the internal resistance, the K value and the constant current charging time;
and grouping the plurality of batteries to be assembled according to the interval range of the electrical performance parameters corresponding to each battery to be assembled to obtain a plurality of battery packs.
Further, the step of grouping each to-be-grouped battery cell according to the electrical performance parameter of each to-be-grouped battery cell in the battery pack to obtain a plurality of target battery packs includes:
and matching each battery cell to be matched according to the voltage, the internal resistance, the K value and the charging constant current ratio of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the charging constant current ratio refers to the percentage of the constant current charging capacity of the battery to be matched to the total constant current constant voltage charging capacity.
Further, the step of grouping each to-be-grouped battery cell according to the electrical performance parameter of each to-be-grouped battery cell in the battery pack to obtain a plurality of target battery packs includes:
and matching each battery cell to be matched according to the voltage, the internal resistance, the K value and the discharge average voltage of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the discharge average voltage refers to the average voltage of the battery to be matched in the constant current discharge process.
A second aspect of the embodiments of the present invention provides a battery pack applied to the steps of the process method provided in the first aspect.
Further, the connection relation of the electric cores in the battery pack is serial-parallel connection.
Further, the battery pack comprises a nickel cobalt manganese ternary battery, a nickel cobalt aluminum ternary battery, a lithium iron phosphate battery, a lithium manganate battery, a ternary lithium manganate battery, a lithium iron phosphate battery, a ternary lithium iron phosphate battery, a lithium cobaltate plus ternary battery, a lithium cobaltate plus lithium manganate battery, a sodium ion battery or a solid-state battery.
Compared with the prior art, the embodiment of the invention has the beneficial effects that: the method comprises the steps of respectively carrying out constant-current constant-voltage charge and constant-current discharge on a plurality of battery cells to be assembled, and then collecting the capacities of the plurality of battery cells to be assembled; grouping the plurality of battery cores to be assembled according to the capacities of the plurality of battery cores to be assembled to obtain a plurality of first battery packs; and matching each to-be-matched battery cell according to the electrical performance parameters of each to-be-matched battery cell in the first battery pack to obtain a plurality of target battery packs, wherein the electrical performance parameters comprise constant current charging time and discharge average voltage. According to the scheme, after constant-current constant-voltage charging and constant-current discharging, the battery cells to be assembled are grouped according to the capacity of the battery cells to be assembled, and on the basis of grouping, the battery cells to be assembled are assembled according to the constant-current charging time and the discharging average voltage of each battery cell to be assembled, so that a plurality of target battery packs are obtained. Through the grouping in a plurality of dimensions, the consistency of the battery cells is improved, and the electrical parameters of each battery cell in each group of battery packs tend to be consistent. According to the scheme, the battery packs are assembled according to the constant-current charging time and the discharging average voltage of each battery cell to be assembled, so that a plurality of target battery packs are obtained, the voltage difference between the battery cells is further reduced, and the service life of the battery packs is prolonged.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 shows a schematic flow chart of a process method for assembling a power storage battery provided by the invention;
fig. 2 shows a specific schematic flow chart of step 101 in a process method for assembling a power storage battery provided by the invention;
fig. 3 shows a specific schematic flowchart of step 103 in a process method for assembling a power storage battery according to the present invention.
Detailed Description
Firstly, the invention provides a process method for assembling a power energy storage battery. Referring to fig. 1, fig. 1 is a schematic flow chart of a process method for assembling a power energy storage battery according to the present invention. As shown in fig. 1, the process may include the steps of:
step 101: and after the plurality of battery cells to be assembled are respectively subjected to constant-current constant-voltage charge and constant-current discharge, collecting the capacities of the plurality of battery cells to be assembled.
In the field of power energy storage batteries, a large number of single battery cells are often required to be assembled to achieve higher voltage and capacity, and the requirement of a motor on power is met. However, certain performance differences exist among the single battery cells in the production process of the power battery, and if the single battery cells are assembled with the differences, the overall consistency of a battery system is poor, and the due performance of the single battery cells cannot be exerted. Meanwhile, the available capacity and the service life of the battery system can be seriously influenced, so that the single battery cells are reasonably assembled, and the influence of the electrical property difference on the overall performance is very necessary.
In order to improve the consistency of the electrical differences among the battery cells in the power battery, the power battery needs to be divided into capacity and assembled before output. The capacity division refers to classification according to actual calibration capacity differences of the battery cells. The battery pack is formed by classifying and combining a plurality of battery cells according to fixed electrical parameters. Wherein, the electric parameters of each battery cell in each group of battery packs are required to be ensured to be consistent. The electrical parameters include, but are not limited to, one or a combination of parameters such as cell capacity, voltage, internal resistance, and K-value. Where the K value represents the voltage drop per unit time.
Firstly, the invention performs capacity-dividing treatment on a plurality of batteries to be assembled, and the specific process is as follows:
specifically, step 101 specifically includes steps 1011 to 1013. As shown in fig. 2, fig. 2 is a specific schematic flowchart of step 101 in a process method for assembling a power storage battery according to the present invention.
Step 1011: and performing constant-current discharge on the plurality of battery cells to be assembled until the electric quantity is exhausted.
Step 1012: and carrying out constant-current and constant-voltage charging on the plurality of battery cells to be assembled to a full-charge state.
In order to accurately measure the capacity of each cell, the cells to be assembled are subjected to constant-current discharge until the electric quantity is exhausted, and then the cells to be assembled are subjected to constant-current constant-voltage charge until the state of full charge, so that the charge resources of each cell are consistent.
Step 1013: and performing constant-current discharge on the plurality of battery cells to be assembled within a preset time period, and collecting the capacities of the plurality of battery cells to be assembled.
Step 102: and grouping the plurality of battery cells to be assembled according to the capacities of the plurality of battery cells to be assembled to obtain a plurality of first battery packs.
And arranging the plurality of battery cells to be assembled from high to low according to the capacities of the plurality of battery cells to be assembled, so as to obtain the ordered battery cell group to be assembled. And dividing the to-be-assembled battery cell groups in equal parts to obtain a plurality of first battery packs. Wherein the number of the equal division is a preset number. For example: the 1200 battery cells to be assembled are ordered according to the volume, the equal division number is 3, 1 to 400 battery cells to be assembled are used as a first battery pack, 401 to 800 battery cells to be assembled are used as a first battery pack, and 801 to 1200 battery cells to be assembled are used as the first battery pack.
Step 103: and matching each to-be-matched battery cell according to the electrical performance parameters of each to-be-matched battery cell in the first battery pack to obtain a plurality of target battery packs, wherein the electrical performance parameters comprise constant current charging time and discharge average voltage.
The invention provides two assembly modes, which are respectively as follows:
the first formula: specifically, step 103 specifically includes: and matching each battery cell to be matched according to the voltage, the internal resistance, the K value, the constant-current charging time and the discharging average voltage of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the constant-current charging time refers to the time required for charging the battery cell to be matched from 0 electric quantity to a constant voltage point.
Specifically, the first formulation specifically includes: step 1031 to step 1037. As shown in fig. 3, fig. 3 is a specific schematic flowchart illustrating step 103 in a process method for assembling a power storage battery according to the present invention.
Step 1031: and according to the voltages of the plurality of battery cells to be assembled in the first battery pack, arranging the plurality of battery cells to be assembled from high to low, and orderly forming a first battery cell group to be assembled.
Step 1032: and dividing the first battery cell group to be assembled in equal parts to obtain a plurality of second battery packs.
For example: the 400 battery cells to be assembled in the first battery pack are ordered according to the voltage, the number of equal division is 4, 1 to 100 battery cells to be assembled are taken as a second battery pack, 101 to 200 battery cells to be assembled are taken as a second battery pack, 201 to 300 battery cells to be assembled are taken as a second battery pack, and 301 to 400 battery cells to be assembled are taken as a second battery pack. The dividing process of the subsequent steps is similar to step 1032 of step 1031, and will not be described herein.
Step 1033: and arranging a plurality of to-be-assembled battery cells from high to low according to the internal resistance of each to-be-assembled battery cell in the second battery pack to obtain an ordered second to-be-assembled battery cell group.
Step 1034: and dividing the second to-be-assembled battery cell group in equal parts to obtain a plurality of third battery packs.
Step 1035: and arranging a plurality of to-be-assembled battery cells from high to low according to the K value in each to-be-assembled battery cell in the third battery pack to obtain an ordered third to-be-assembled battery cell group.
Step 1036: and dividing the third to-be-assembled battery cell group in equal parts to obtain a plurality of fourth battery packs.
Step 1037: and arranging a plurality of to-be-assembled battery cells from high to low according to the constant current charging time to obtain ordered fourth to-be-assembled battery cell groups.
Step 1038: and dividing the fourth to-be-assembled battery cell group in equal parts to obtain a plurality of target battery packs.
Specifically, the composition may also be performed as follows: and respectively acquiring a plurality of interval ranges corresponding to the voltage, the internal resistance, the K value and the constant current charging time. And grouping the plurality of batteries to be assembled according to the interval range of the electrical performance parameters corresponding to each battery to be assembled to obtain a plurality of battery packs. For example: taking voltage as an example, the ranges of the intervals corresponding to the voltage are respectively as follows: 3.700 to 3.705 volts, 3.705 to 3.710 volts and 3.710 to 3.715 volts, and the battery to be assembled belonging to the same interval range is used as a battery.
The second assembly mode is as follows: specifically, step 103 specifically includes: and matching each battery cell to be matched according to the voltage, the internal resistance, the K value and the discharge average voltage of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the discharge average voltage refers to the average voltage of the battery to be matched in the constant current discharge process.
Specifically, the process method provided by the invention is applied to a battery pack, wherein the battery pack comprises a nickel cobalt manganese ternary battery, a nickel cobalt aluminum ternary battery, a lithium iron phosphate battery, a lithium manganate battery, a ternary lithium manganate battery, a lithium iron phosphate battery, a ternary lithium iron phosphate battery, a lithium cobaltate plus ternary battery, a lithium cobaltate lithium manganate battery, a sodium ion battery or a solid-state battery and the like. The connection relation of the battery cells in the battery pack is serial-parallel connection.
In this embodiment, after constant current discharge and constant current charge are performed on a plurality of to-be-assembled battery cells, the capacities of the plurality of to-be-assembled battery cells are collected; grouping the plurality of battery cores to be assembled according to the capacities of the plurality of battery cores to be assembled to obtain a plurality of first battery packs; and matching each to-be-matched battery cell according to the electrical performance parameters of each to-be-matched battery cell in the first battery pack to obtain a plurality of target battery packs, wherein the electrical performance parameters comprise constant current charging time and discharge average voltage. According to the scheme, after constant-current constant-voltage charging and constant-current discharging, the battery cells to be assembled are grouped according to the capacity of the battery cells to be assembled, and on the basis of grouping, the battery cells to be assembled are assembled according to the constant-current charging time and the discharging average voltage of each battery cell to be assembled, so that a plurality of target battery packs are obtained. Through the grouping in a plurality of dimensions, the consistency of the battery cells is improved, and the electrical parameters of each battery cell in each group of battery packs tend to be consistent. According to the scheme, the battery packs are assembled according to the constant-current charging time and the discharging average voltage of each battery cell to be assembled, so that a plurality of target battery packs are obtained, the voltage difference between the battery cells is further reduced, and the service life of the battery packs is prolonged.
It should be understood that the sequence number of each step in the foregoing embodiment does not mean that the execution sequence of each process should be determined by the function and the internal logic, and should not limit the implementation process of the embodiment of the present invention.
It should also be understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Furthermore, the terms "first," "second," "third," and the like in the description of the present specification and in the appended claims, are used for distinguishing between descriptions and not necessarily for indicating or implying a relative importance.
Reference in the specification to "one embodiment" or "some embodiments" or the like means that a particular feature, structure, or characteristic described in connection with the embodiment is included in one or more embodiments of the invention. Thus, appearances of the phrases "in one embodiment," "in some embodiments," "in other embodiments," and the like in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments" unless expressly specified otherwise. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention.
Claims (10)
1. The process method for matching the power energy storage battery is characterized by comprising the following steps of:
after a plurality of battery cores to be assembled are respectively subjected to constant-current constant-voltage charge and constant-current discharge, the capacities of the plurality of battery cores to be assembled are collected;
grouping the plurality of battery cores to be assembled according to the capacities of the plurality of battery cores to be assembled to obtain a plurality of first battery packs;
and matching each to-be-matched battery cell according to the electrical performance parameters of each to-be-matched battery cell in the first battery pack to obtain a plurality of target battery packs, wherein the electrical performance parameters comprise constant current charging time and discharge average voltage.
2. The process of claim 1, wherein the step of collecting the capacities of the plurality of battery cells to be assembled after the plurality of battery cells to be assembled are respectively charged with constant current and constant voltage and discharged with constant current comprises the steps of:
constant-current discharging is carried out on the plurality of battery cores to be assembled until the electric quantity is exhausted;
constant-current and constant-voltage charging is carried out on the plurality of battery cores to be assembled to a full-charge state;
and performing constant-current discharge on the plurality of battery cells to be assembled within a preset time period, and collecting the capacities of the plurality of battery cells to be assembled.
3. The process according to claim 1, wherein the step of assembling each of the to-be-assembled battery cells according to the electrical performance parameter of each of the to-be-assembled battery cells in the battery pack to obtain a plurality of target battery packs comprises:
and matching each battery cell to be matched according to the voltage, the internal resistance, the K value, the constant-current charging time and the discharging average voltage of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the constant-current charging time refers to the time required for charging the battery cell to be matched from 0 electric quantity to a constant voltage point.
4. The process according to claim 3, wherein the step of grouping each of the battery cells to be assembled according to the voltage, the internal resistance, the K value, the constant current charging time and the discharge average voltage of each of the battery cells to be assembled to obtain a plurality of target battery packs comprises:
according to the voltages of the plurality of battery cores to be assembled in the first battery pack, arranging the plurality of battery cores to be assembled from high to low, and orderly forming a first battery core group to be assembled;
dividing the first battery cell group to be assembled in equal parts to obtain a plurality of second battery packs;
arranging a plurality of to-be-assembled battery cells from high to low according to the internal resistance of each to-be-assembled battery cell in the second battery pack to obtain an ordered second to-be-assembled battery cell group;
dividing the second to-be-assembled battery cell group in equal parts to obtain a plurality of third battery packs;
arranging a plurality of to-be-assembled battery cells from high to low according to the K value in each third battery pack to obtain an ordered third to-be-assembled battery cell group;
dividing the third to-be-assembled battery cell group in equal parts to obtain a plurality of fourth battery packs;
arranging a plurality of to-be-assembled battery cells from high to low according to the constant current charging time to obtain ordered fourth to-be-assembled battery cell groups;
and dividing the fourth to-be-assembled battery cell group in equal parts to obtain a plurality of target battery packs.
5. The process according to claim 3, wherein said step of assembling each of said plurality of cells according to said voltage, internal resistance, K value and said constant current charging time of each of said plurality of cells comprises:
respectively acquiring a plurality of interval ranges corresponding to the voltage, the internal resistance, the K value and the constant current charging time;
and grouping the plurality of batteries to be assembled according to the interval range of the electrical performance parameters corresponding to each battery to be assembled to obtain a plurality of battery packs.
6. The process according to claim 1, wherein the step of assembling each of the to-be-assembled battery cells according to the electrical performance parameter of each of the to-be-assembled battery cells in the battery pack to obtain a plurality of target battery packs comprises:
and matching each battery cell to be matched according to the voltage, the internal resistance, the K value and the charging constant current ratio of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the charging constant current ratio refers to the percentage of the constant current charging capacity of the battery to be matched to the total constant current constant voltage charging capacity.
7. The process according to claim 1, wherein the step of assembling each of the to-be-assembled battery cells according to the electrical performance parameter of each of the to-be-assembled battery cells in the battery pack to obtain a plurality of target battery packs comprises:
and matching each battery cell to be matched according to the voltage, the internal resistance, the K value and the discharge average voltage of each battery cell to be matched in the battery pack to obtain a plurality of target battery packs, wherein the K value refers to the voltage drop of the battery in unit time, and the discharge average voltage refers to the average voltage of the battery to be matched in the constant current discharge process.
8. A battery pack, characterized in that it is applied to the steps of the process according to any one of claims 1 to 7.
9. The battery pack of claim 8, wherein the cell connections in the battery pack are in series-parallel connection.
10. The battery of claim 8, wherein the battery comprises a nickel cobalt manganese ternary battery, a nickel cobalt aluminum ternary battery, a lithium iron phosphate battery, a lithium manganate battery, a lithium ternary manganate battery, a lithium iron manganese phosphate battery, a lithium ternary manganate battery, a lithium cobaltate plus ternary battery, a lithium cobaltate plus lithium manganate battery, a sodium ion battery, or a solid state battery.
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| CN202211462055.5A CN116111193A (en) | 2022-11-17 | 2022-11-17 | Power energy storage battery matching process method and battery pack |
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| CN202211462055.5A CN116111193A (en) | 2022-11-17 | 2022-11-17 | Power energy storage battery matching process method and battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577687A (en) * | 2023-07-14 | 2023-08-11 | 南昌航空大学 | Cell screening method and system for quick-charging battery pack, storage medium and computer |
| CN116577687B (en) * | 2023-07-14 | 2024-04-19 | 南昌航空大学 | Cell screening method and system for quick-charging battery pack, storage medium and computer |
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2022
- 2022-11-17 CN CN202211462055.5A patent/CN116111193A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116577687A (en) * | 2023-07-14 | 2023-08-11 | 南昌航空大学 | Cell screening method and system for quick-charging battery pack, storage medium and computer |
| CN116577687B (en) * | 2023-07-14 | 2024-04-19 | 南昌航空大学 | Cell screening method and system for quick-charging battery pack, storage medium and computer |
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