CN102340022B - Power battery and manufacturing method for same - Google Patents
Power battery and manufacturing method for same Download PDFInfo
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- CN102340022B CN102340022B CN201110281327.7A CN201110281327A CN102340022B CN 102340022 B CN102340022 B CN 102340022B CN 201110281327 A CN201110281327 A CN 201110281327A CN 102340022 B CN102340022 B CN 102340022B
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- Prior art keywords
- cell
- battery
- motive
- power battery
- cell module
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 23
- 238000011056 performance test Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000007257 malfunction Effects 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 5
- 229910001416 lithium ion Inorganic materials 0.000 description 5
- 238000009413 insulation Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 150000004681 metal hydrides Chemical class 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a power battery and a manufacturing method for the same. The manufacturing method for the power battery comprises the following steps of: acquiring a plurality of single batteries and testing performance parameters of the single batteries; dividing the plurality of single batteries with the performance parameters meeting requirements into a plurality of groups of which each comprises n single batteries with consistent performance parameters, and connecting the n single batteries in parallel to form a battery unit module; performing performance testing on the battery unit modules; and connecting the m battery unit modules with the consistent performance parameters in series to form a battery pack, wherein n and m are both integers more than 1. By the manufacturing method, not only the power battery with high specific capacity and specific power can be obtained, but also the power battery with equalized charging, high security and long service life can be obtained.
Description
Technical field
The present invention relates to electric vehicle engineering field, be specifically related to a kind of motive-power battery and manufacture method thereof.
Background technology
Economic development, the utilization of resources and environmental protection are the focuses of paying close attention to the new century; and day by day serious along with the day by day exhausted and automobile exhaust pollution of petroleum-based energy; in the urgent need to researching and developing and producing clear energy sources automobile of new generation, as electric automobile, to alleviate oil crisis and to reduce environmental pollution.
As everyone knows, the core of electric automobile is high power capacity, powerful battery, and battery is generally in series by multiple cells.Cell can be lithium rechargeable battery, nickel one metal hydride battery or other secondary cell, can be also the charge storage element such as capacitor etc.
As, Japanese Patent Application Laid-Open JP2001-57196 discloses a kind of on-vehicle battery group, and this on-vehicle battery group is that nickle-metal hydride secondary battery identical multiple shapes is cascaded and is formed.
And for example, Chinese patent CN1976112B discloses a kind of manufacture method of large-capacity power type lithium ion battery pack, and it adopts multiple cells to combine equally.The lithium ion battery group being produced by this manufacture method is made up of multiple batteries time composite module of parallel connection, and each battery time composite module is made up of multiple battery cell modules of connecting, and each battery cell module is made up of multiple monocells of parallel connection.
Although the motive-power battery of two kinds of structures that above-mentioned Japan Patent and Chinese patent are recorded all can obtain high power capacity, powerful capacity, but it exists that charging is unbalanced, poor stability and the shortcoming such as useful life is short.
Summary of the invention
The present invention proposes a kind of manufacture method of motive-power battery, not only specific capacity is high for the motive-power battery of being made by the method, specific power is high, and charge balancing, safe and long service life.
The invention allows for a kind of motive-power battery, not only specific capacity is high for this motive-power battery, specific power is high, and charge balancing, safe and long service life.
In order to achieve the above object, the present invention proposes a kind of manufacture method of motive-power battery, comprise the following steps: obtain multiple cells and test its performance parameter; Satisfactory performance parameter described multiple cells are divided into many groups, and every group comprises n the described cell that performance parameter is consistent, and by a described n cell and be unified into battery cell module; Described battery cell module is carried out to performance test; A m consistent performance parameter battery cell module is connected into battery pack; Wherein, n and m are the integer that is greater than 1.
Preferably, the performance test that described cell carries out comprises: anti-vibration ability, ageing aptitude, internal resistance, voltage, weight and the voltage drop of described cell.
Preferably, the performance test that described cell carries out also comprises:
Described cell is carried out to more than three times 1C charge and discharge cycles, test constant current percentage, discharging efficiency and the discharge capacity of described cell.
Preferably, the performance test that described battery cell module carries out comprises:
Described battery cell module is carried out to above 1C charge and discharge cycles, the temperature of testing constant current percentage, discharging efficiency, discharge capacity and each described cell of described battery cell module twice;
Described battery cell module is charged to the combination voltage of motive-power battery group, and more than shelving 24h.
The present invention also provides a kind of motive-power battery, comprises shell and battery pack, and described battery pack adopts the manufacture method of described motive-power battery provided by the invention choose and be connected.
Preferably, described battery cell module is cascaded by the mode that is flexible coupling.
Preferably, in described battery cell module, described cell adopts metal current collecting tier made of copper to connect.
Preferably, total output of described battery pack is serially connected with BMS management system and the equalizer for monitoring described battery cell operating state.
Preferably, be in series with for preventing that high voltage is to the hurtful high voltage protective system of described cell at total output of described battery pack.
Preferably, between described shell and described battery pack, be provided with the insulating epoxy plate of fastening described battery pack.
Compared with prior art, the present invention has following beneficial effect:
The manufacture method of the motive-power battery that the present invention proposes, with the consistent cell of performance parameter and be unified into battery cell module, again battery cell module consistent performance parameter is connected into battery pack, this manufacture method not only can obtain specific capacity, motive-power battery that specific power is high, and can obtain the motive-power battery of charge balancing, fail safe and high life.
In the motive-power battery that the present invention proposes, not only the performance parameter of each battery cell module is consistent, and the performance parameter of each cell of composition battery cell module is also consistent, this not only makes motive-power battery have height ratio capacity, high-specific-power, and can make motive-power battery charge balancing, improve its fail safe and useful life.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the flow chart of the motive-power battery manufacture method that proposes of the present invention;
Fig. 2 is the motive-power battery structure diagram that the present invention proposes;
Fig. 3 is the structural representation of the battery cell module that proposes of the present invention.
Embodiment
For making those skilled in the art understand better technical scheme of the present invention, the motive-power battery and the manufacture method thereof that the present invention are proposed below in conjunction with accompanying drawing are described in detail.
The manufacture method that the invention allows for a kind of motive-power battery, refers to Fig. 1, and the manufacture method of the motive-power battery that the present invention proposes is as follows:
Step s10, obtains multiple cells and its performance is tested.
In step s10, first to choose qualified cell, then according to the requirement of national standardization technical guide, each cell is tested successively as follows:
The first, anti-vibration aptitude tests.After vibration processing, observe cell and whether can normally work, the cell of cisco unity malfunction is got rid of.
The second, ageing aptitude.Whether shelve at normal temperatures cell 15 days, observing cell has the problem such as leakage, swell, and the cell that has leakage, swell problem is got rid of.Placing in the process of cell, can make the electrolyte in cell fully infiltrate, thereby make the stable performance of capacity of cell.
The 3rd, measure internal resistance, voltage, weight and the voltage degradation performance parameter of each cell, cell consistent performance parameter is carried out to pre-combo.
Step s20, is divided into many groups by described multiple cells, and every group comprises n the described cell that performance parameter is consistent, and by a described n cell and be unified into battery cell module.
Each cell to pre-combo in step s10 carries out three times or more times 1C charge and discharge cycles, detects constant current percentage, discharging efficiency and the discharge capacity of cell, then chooses 1C and discharges and recharges the basically identical n of a data cell and carry out combo; Adopt again metal current collecting tier, if copper current collecting tier is by n cell and be unified into battery cell module, and make battery cell module can meet the required capacity of motive-power battery.
Step s30, carries out performance test to described battery cell module.
Battery cell module is carried out to above 1C charge and discharge cycles twice, preferably 2～5 1C charge and discharge cycles, the performance parameter such as temperature, voltage of constant current percentage, discharging efficiency, discharge capacity and each cell of test battery unit module.Then battery cell module basically identical performance parameter is charged to the combination voltage of motive-power battery group, and more than shelving 24h, whether there is the problem such as leakage, swell with the cell of further observing in battery cell module, the cell that has leakage, swell problem is changed, and retested the performance parameter of this battery cell module.Shelving in process of battery cell module, can make the electrolyte in cell fully infiltrate, thereby make the capacity of battery cell module stable.
Step s40, is connected into battery pack by a m consistent performance parameter battery cell module.
Choose m the battery cell module that performance parameter is consistent, and adopt copper mesh, in the mode that is flexible coupling, m battery cell module is connected into motive-power battery, wherein, m is greater than 1 integer.The mode that is flexible coupling can increase the toughness connecting between battery cell module, thereby can avoid causing the connection between battery cell module loosening because of vehicle vibrations, this can be avoided contacting internal resistance increases, thereby can avoid damaging because cell is overheated, and then improve the useful life of motive-power battery.
Step s50, connects BMS management system (lithium ion battery management system) and equalizer at the output of battery pack.
BMS management system can detect the voltage of each battery cell module, temperature, current status and state-of-charge.In the time of certain battery cell module existing problems, BMS management system will be sent the instruction of reporting to the police, thereby can prevent that the electric current of cell is excessive, overcharges, overdischarge and excess Temperature, and then equilibrium that can more effective guarantee battery pack and stablizing.Particularly, the mode that equalizer adopts charge balancing and equalization discharge to combine, in charging, the cell higher to minority voltage discharges, to guarantee that motive-power battery obtains maximum energy supply; Travel electric discharge process in, the cell of low voltage is charged, makeup energy, with improve motive-power battery discharge capability and flying power.Equalizer can solve the problem that motive-power battery consistency is brought preferably, thereby the cycle-index of motive-power battery can be brought up to more than 500 times.
Step s60, puts into battery pack on the shell of motive-power battery, and is filled into the space between whole battery pack and shell with insulating epoxy plate, thereby battery pack is securely fixed in shell.
Step s70, connects ADS system (high voltage protective system) at the output of battery pack, to prevent that the high pressure that load produces from causing damage to battery pack, thereby improves the fail safe of motive-power battery.
Step s80, at the output of motive-power battery and be positioned at the arranged outside protection type rubber parts (not shown) of shell, to prevent that battery pack from causing damage because shelving for a long time, motive-power battery entirety is carried out to waterproof and dustproof, anti-short circuit processing simultaneously.
The manufacture method of the motive-power battery that the present embodiment proposes, with the consistent cell of performance parameter and be unified into battery cell module, again battery cell module consistent performance parameter is connected into battery pack, this not only can obtain specific capacity, motive-power battery that specific power is high, and can obtain the motive-power battery of charge balancing, fail safe and high life.Particularly, specific power can reach 150w/kg, and specific energy can reach 75wh/kg, and cycle life can reach more than 500 times.
The present embodiment also provides a kind of motive-power battery.Fig. 2 is the motive-power battery structure diagram that the present invention proposes, and Fig. 3 is the structural representation of the battery cell module that proposes of the present invention.See also Fig. 2 and Fig. 3, motive-power battery comprises shell 1 and is arranged on battery pack 2, BMS management system and equalizer 4, the ADS system 5 in shell 1, and battery pack 2 comprises 14 battery cell modules 21, for obtaining the required voltage of motive-power battery; Each battery cell module 21 comprises 4 cells 22 in parallel, to obtain the required capacity of motive-power battery.
In the present embodiment, cell 22 in parallel connects by metal current collecting tier, and the battery cell module 21 of series connection adopts copper mesh 3 to be flexible coupling, and this connected mode can avoid the electrical connection between cell 22 and between battery cell module 21 to damage.
Be in series with BMS management system (lithium ion battery management system) 4 and equalizer 4 protection controls at total output of battery pack.BMS management system and equalizer 4 can detect voltage, temperature, current status and the state-of-charge of each cell 22.In the time that certain cell 22 goes wrong, BMS management system and equalizer 4 send the instruction of reporting to the police, remind operating personnel to check this cell 22, thereby can prevent because the electric current of this cell 22 is excessive, overcharge, stability that overdischarge and excess Temperature affect motive-power battery.
Also be provided with ADS system (high voltage protective system) 5 at the output of battery pack 2, to prevent that the high pressure that load produces from causing damage to battery pack, thereby improve the fail safe of motive-power battery.
Between battery pack 2 and shell 1, be provided with the insulation board (not shown) for fastening battery pack 2, insulation board adopts insulating epoxy plate, battery pack can be securely fixed in shell 1 by insulation board, thereby can avoid battery pack 2 loosening and damage.
Be provided with protection type rubber parts 7 at the output of battery pack 2 and the outside that is positioned at shell 1, damage to avoid motive-power battery to shelve for a long time.
In the motive-power battery that the present embodiment proposes, cell 22 can adopt lithium ion battery, ni-MH battery or other secondary cell.
It should be noted that, in the present embodiment, motive-power battery is provided with 14 battery cell modules 21, and each battery cell module 21 comprises 4 cells, but the present invention is also without ceasely limited to this.In motive-power battery, can comprise that two with last battery cell module 21, and each battery cell module 21 can comprise that two with last cell 22, be that the motive-power battery that the present invention proposes can comprise m battery cell module 21, and, each battery cell module 21 can comprise n cell 22, wherein, m, n are greater than 1 integer.
In the motive-power battery that the present invention proposes, not only the performance of each battery cell module is consistent, and the performance of each cell of composition battery cell module is also consistent, this not only makes motive-power battery have height ratio capacity, high-specific-power, and can make motive-power battery charge balancing, improve its fail safe and useful life.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a manufacture method for motive-power battery, for electric automobile, is characterized in that, comprises the following steps:
Obtain multiple cells and test its performance parameter; Wherein, the performance test that described cell carries out comprises: anti-vibration ability, ageing aptitude, internal resistance, voltage, weight and the voltage drop of described cell;
Particularly, each cell is tested successively as follows:
The first, anti-vibration aptitude tests; After vibration processing, observe cell and whether can normally work, the cell of cisco unity malfunction is got rid of;
The second, ageing aptitude; Shelve at normal temperatures cell 15 days, whether have leakage, swell problem, the cell that has leakage, swell problem is got rid of, in the process of placement cell if observing cell, electrolyte in cell is fully infiltrated, so that the stable performance of the capacity of cell;
The 3rd, measure these performance parameters of internal resistance, voltage, weight and voltage drop of each cell, cell consistent above-mentioned performance parameter is carried out to pre-combo;
Multiple cells in satisfactory performance parameter described pre-combo are divided into many groups, and every group comprises n the described cell that performance parameter is consistent, and by a described n cell and be unified into battery cell module;
Described battery cell module is carried out to performance test;
A m consistent performance parameter battery cell module is connected into battery pack;
Wherein, n and m are the integer that is greater than 1.
2. the manufacture method of motive-power battery as claimed in claim 1, is characterized in that, the performance test that described cell carries out also comprises:
Described cell is carried out to more than three times 1C charge and discharge cycles, test constant current percentage, discharging efficiency and the discharge capacity of described cell.
3. the manufacture method of motive-power battery as claimed in claim 1, is characterized in that, the performance test that described battery cell module carries out comprises:
Described battery cell module is carried out to above 1C charge and discharge cycles, the temperature of testing constant current percentage, discharging efficiency, discharge capacity and each described cell of described battery cell module twice;
Described battery cell module is charged to the combination voltage of motive-power battery group, and more than shelving 24h.
4. a motive-power battery, comprises shell and battery pack, it is characterized in that, described battery pack adopts the manufacture method of the motive-power battery described in claim 1-3 any one choose and be connected.
5. motive-power battery as claimed in claim 4, is characterized in that, described battery cell module is cascaded by the mode that is flexible coupling.
6. motive-power battery as claimed in claim 4, is characterized in that, in described battery cell module, described cell adopts metal current collecting tier made of copper to connect.
7. motive-power battery as claimed in claim 4, is characterized in that, total output of described battery pack is serially connected with BMS management system and the equalizer for monitoring described battery cell operating state.
8. motive-power battery as claimed in claim 7, is characterized in that, is in series with for preventing that high voltage is to the hurtful high voltage protective system of described cell at total output of described battery pack.
9. motive-power battery as claimed in claim 4, is characterized in that, is provided with the insulating epoxy plate of fastening described battery pack between described shell and described battery pack.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110281327.7A CN102340022B (en) | 2011-09-16 | 2011-09-16 | Power battery and manufacturing method for same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110281327.7A CN102340022B (en) | 2011-09-16 | 2011-09-16 | Power battery and manufacturing method for same |
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| Publication Number | Publication Date |
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| CN102340022A CN102340022A (en) | 2012-02-01 |
| CN102340022B true CN102340022B (en) | 2014-11-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5928441B2 (en) | 2013-12-19 | 2016-06-01 | トヨタ自動車株式会社 | Manufacturing method of all solid state battery |
| CN104091975B (en) * | 2014-07-22 | 2016-09-07 | 合肥国轩高科动力能源有限公司 | Efficient lithium battery matching method |
| CN106252763A (en) * | 2016-09-29 | 2016-12-21 | 马洪沛 | A kind of electric vehicle power sources |
| CN106532150B (en) * | 2016-12-02 | 2019-05-03 | 中国船舶重工集团公司第七一九研究所 | A kind of modular controllable topological structure of high-voltage large-capacity lithium battery group |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100033128A1 (en) * | 2007-10-09 | 2010-02-11 | O2Micro, Inc. | Circuit and method for cell balancing |
| CN101814632A (en) * | 2010-05-05 | 2010-08-25 | 章森 | Cell optimizing and matching technology based on charge and discharge characteristics |
| CN101944638B (en) * | 2010-09-08 | 2013-06-12 | 奇瑞汽车股份有限公司 | Manufacturing method of lithium-ion battery pack used for electric automobile |
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