CN1178398A - Cooling method of batteries - Google Patents
Cooling method of batteries Download PDFInfo
- Publication number
- CN1178398A CN1178398A CN97119364A CN97119364A CN1178398A CN 1178398 A CN1178398 A CN 1178398A CN 97119364 A CN97119364 A CN 97119364A CN 97119364 A CN97119364 A CN 97119364A CN 1178398 A CN1178398 A CN 1178398A
- Authority
- CN
- China
- Prior art keywords
- battery
- batteries
- pole
- unit cells
- refrigerant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
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
Landscapes
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The present invention concerns a method for cooling assembled batteries comprising rechargeable batteries and intends to avoid temperature dispersion among single cells and hence avoid dispersion of battery performance. A module battery 10 is so constructed that convex portions 8 provided on the battery container 2 of the single cells 7 come in contact with each other creating by recessed portion 9 a space 11 in the vertical direction between single cells 7. The module battery 10 is banded by means of aluminum plates 12 and iron bands 13 with the single cells 7 at both ends forced inwardly. The module batteries are placed sideways with the terminals facing the same direction and the cooling medium flows toward the surface where the electrode poles are provided.
Description
The present invention relates to the cooling means of the battery pack that a kind of batteries lumps together.
The closed alkaline battery is representative with nickel-cadmium cell and nickel-hydrogen accumulator, the energy density height, and excellent in reliability, thereby mostly as the power supply of portable equipment (television camera, knee face computer, portable phone etc.).These single batteries belong to metallic casing, be shaped as cylinder or rectangle, capacity is the small-sized closed alkaline battery about 0.5～3Ah.In actual the use, generally be that several being contained in resin-case and the tube to tens single batteries used.These small-sized its battery capacities of closed alkaline battery are about 0.5～3Ah, thus when discharging and recharging single battery average caloric value seldom.Thereby be contained in the time spent in resin-case and the tube, owing to suitably balance has been carried out in heating and heat radiation, thereby do not cause the obvious problem that relates to the battery temperature rise.
The alkaline battery electrode group expands because of repeated charge, but housing is a metallic cylinder, thereby does not have the expansion of electrode group to cause obvious problems such as housing distortion.The rectangle occasion also needn't be taken time to housing etc. specially because of small-sized.
But (medium-sized battery is defined as capacity 10～100Ah to the large and medium-sized battery of tight demand high-energy-density and high reliability, and large-sized battery is defined as more than the capacity 100Ah recently.It is several to hundreds of to use number all to be defined as), with the portable power source that satisfies from household appliances to electric automobile etc.With regard to large and medium-sized battery, open nickel-cadmium cell and lead accumulator are used for purposes such as energy storage purposes and UPS, but fluid injection etc. is safeguarded more loaded down with trivial details between the operating period.Thereby, for the portable power source of household appliances, need battery non-maintaining to electric automobile, that is to say, need battery airtight.When doing the household electrical appliances product, need finish airtight and large and medium-sizedization of battery with alkaline storage battery used simultaneously as mentioned above to the portable power source of electric automobile.Specifically, when reaching the airtight purpose of single battery, need to increase the capacity of single battery, and a plurality of single batteries are connected in series in order to increase cell voltage.
Battery is accompanied by and discharges and recharges reaction heat and the Joule heat generation that electrode reaction produces.Because the capacity of single battery increases and the airtight heat that produces increases, slower to the heat radiation of outside batteries, the heat storage that is produced is in inside battery, and internal temperature of battery rises to some extent than compact battery as a result.In addition, unit cells that the series connection of this large capacity single battery is formed by connecting and the unit cells battery pack disposed adjacent that forms that is connected in series has tens to a hundreds of element cell, thereby how to discharge this heat to the outside becomes problem.In order to address this is that, the spy opens flat 3-291867 communique and proposes a kind of by anodal, negative pole with the battery system heat abstractor that electrolyte constitutes, the system that forms with a plurality of arrangements of single storage battery of generating heat when charge is provided with the circulation of air space between each single battery.
But with the automobile purposes is the mobile battery of representative, because vehicle-mounted space is less, thereby in order to load onto a lot of batteries, battery need be divided into 2 layers of stacking.Simply be divided into 2 layers and stack occasions, tempering air stream has the battery of the stream of warm air of front battery institute release heat through the back just from top to bottom or from the bottom up, causes the cooling capacity of back battery to descend.Front battery and the variant generation of its cooling capacity of back battery, with the difference of battery temperature, difference just appears in charge efficiency, causes battery capacity there are differences.
Battery capacity there are differences, and the less battery of capacity will overdischarge in discharge latter stage, and being in caloric value sharply increases this unsafe condition.And, can estimate this discharge and recharge repeat to cause the cycle life this problem that also shortens.
The present invention addresses this is that just, and its purpose is, provides a kind of temperature contrast between this battery that suppresses, the cooling means of the outstanding battery pack of battery performance indifference.
The present invention is a kind of battery pack that a plurality of unit cells are combined, the per unit battery keeps a plurality of cuboid electricity grooves, its inside contains the electrode group, only on certain one side, anodal and negative pole pole are arranged, at least with the contact-making surface of another electric groove on have and form the used projection in space that refrigerant passes through, wherein refrigerant contacts with the discontinuous face that is provided with electric slot lip, and refrigerant flows to pole place face from pole place face opposite face.
According to above-mentioned formation, the heat that produces in the battery can be released into outside batteries expeditiously, can reduce the temperature difference of each battery.Thereby, can prevent the capacity volume variance of each battery, thereby can provide cycle life characteristics outstanding battery pack.
Fig. 1 is the pie graph of one embodiment of the invention single battery.
Fig. 2 is the pie graph of one embodiment of the invention unit cells.
Fig. 3 is the pie graph of one embodiment of the invention battery pack.
Fig. 4 is the pie graph of Comparative Examples 1 battery pack.
Fig. 5 is the pie graph of Comparative Examples 2 battery pack.
Fig. 6 is life test result's a schematic diagram.
Fig. 7 is the pie graph of one embodiment of the invention battery pack.
Fig. 8 is the pie graph of one embodiment of the invention battery pack.
Following with reference to description of drawings one embodiment of the invention.Fig. 1 illustrates the single battery of the used closed alkaline battery of the present invention, and Fig. 2 illustrates the structure of unit cells.
The 1 following making of electrode group.Positive plate is filling active material nickel hydroxide cadmium dust in foaming shape NI-G porous body, rolls and is cut to given size, is made into the NI-G positive pole that each pole plate average size is 10Ah.Next, but negative plate is the MmNi that electrochemical means absorb is discharged hydrogen
3.6Co
0.7Mn
0.4Al
0.4The hydrogen absorbing alloy powder of forming is coated on the perforated metal with bonding agent, rolls and is cut to given size, is made into the hydrogen absorbed alloy alloy negative pole that each pole plate average size is 13Ah.
Encase these positive and negative pole plates by bag shape spacer respectively, 10 positive plates and 11 negative plate alternate combinations for spacer encases are made into electrode group 1.In addition, electrode group 1 is made into and has about 85～100% thickness with respect to electric groove 2 inside dimensions.With pole is that the positive terminal 3 that the copper and mickel cadmium constitutes is connected with this electrode group 1 with negative terminal 4, inserts the electric groove 2 of polypropylene system.Next, inject 180cm
3Alkaline electrolyte.Then, (it is 2～3kg/cm that effect is pressed by having safety valve 5
2) the airtight peristome that should electricity groove 2 of lid 6, make single battery 7.
Being provided with many flanges that allow refrigerant flow through usefulness along the vertical direction outside electricity groove 2 has is the structure of protuberance 8 and recess 9.Specifically, refrigerant is not to contact with the electric groove that is provided with flange continuously all the time, but by the discontinuous contact of flange disjunction.In addition, the height of protuberance 8 is 1.5mm, and single battery 7 discharges and recharges (charging=10A * 15 hour, discharge=with the 20A discharge is till 1.0V) for the first time, because the expansion of electrode group 1, the most external of electrode group 1 is in the state of contacting with electric groove 2.This single battery 7 is by positive pole regulation battery capacity, and battery capacity is 100Ah.
10 single batteries of making like this 7 are connected in series, make unit cells shown in Figure 2 12.The set protuberance 8 in electric groove 2 outsides that this unit cells 12 forms single battery 7 is in contact with one another, and is provided with the structure in above-below direction space 11 between single battery 7 by recess 9.Unit cells 10 is made of two ends single battery 7 aluminum plate 12 and iron bar 13 along the mounting direction constraint.In addition, cell voltage is 12V.
Cooling means for changing into two this unit cells when two-layer comprises Comparative Examples, and following three kinds are made comparisons.In addition, represent the refrigerant fluid direction with arrow among each figure.(present embodiment) makes the battery traverse as shown in Figure 3, terminal in the same direction, cryogen flow is to the one side that is provided with pole.(Comparative Examples 1) makes battery still be in vertical state as shown in Figure 4, and refrigerant is the coolant flat battery continuously.(Comparative Examples 2) makes the protuberance direction of electric rooved face take laterally to make identical battery as shown in Figure 5, and battery still is in vertically, makes refrigerant cross single battery.
With two unit cells the present invention and Comparative Examples 1,2 these three kinds of formations are carried out cycling life test.Test is, to place 1 hour after 12 hours with the 10A charging, again with the 20A discharge, till 20V.The calculating of unit cells discharge capacity is with calculating the discharge time that cell voltage is discharged to 20V.During charging, by fan along the direction of arrow among the figure to space segment air-supply separately between the unit cells single battery and between aluminium sheet and the single battery.Air is 2.0m/sec by the mean wind speed of space segment 13.Ambient temperature is 20 ℃.Fig. 6 illustrates result of the test.
As shown in Figure 6, life test result, Comparative Examples 1 unit cells capacity descends at first, and next Comparative Examples 2 unit cells capacity descend.Unit cells longest-lived of the present invention.This at first is, Comparative Examples 1 unit cells is to make bottom unit cells cooling by the cooling air that the below is come, and has its heat again by between each single battery in the unit cells of top.Therefore thereby how upper cell is not cooled off, and temperature can be variant between two groups of unit cells.Because this temperature contrast cause charge efficiency variant, thereby discharge capacity is different.The top unit cells enters over-discharge state, and just the anticathode alloy corrodes, lifetime.Secondly,, do not have difference between single battery although Comparative Examples 2 does not have the temperature difference up and down, about produce the temperature difference.Therefore, the variant generation of the charge efficiency of pole plate inside, the reaction of pole plate inside is inhomogeneous, thus when charging the part overcharge overdischarge during discharge, active material variation, lifetime.
Different therewith, unit cells of the present invention makes cooling air evenly by each battery, does not have difference between single battery.In addition,, remove the heat that the pole plate group discharges, can suppress the difference of pole plate inside by terminal although cooling air outlet one side temperature rises.Thereby reach the long-life.
In addition, Comparative Examples 1 air-supply cross section is half of Comparative Examples 2, thus total air output also be Comparative Examples 2 half., thereby can confirm that if 2 times of Comparative Examples 1 air flow rates, cycle life characteristics is than Comparative Examples 2 raisings owing to make Comparative Examples 1 identical with total air output of Comparative Examples 2.
In addition, by as shown in Figure 7 with two groups of this structures back to side-by-side, can evenly cool off more batteries, can obtain effect of the present invention.In addition, export away from staying air-supply side by side slightly again, just can evenly cool off more batteries by the structure that will obtain so as shown in Figure 8.
In sum, according to the present invention, be a kind of battery pack that a plurality of unit cells are combined, the per unit battery keeps a plurality of cuboid electricity grooves, its inside contains the electrode group, only on certain one side, anodal and negative pole pole are arranged, at least with the contact-making surface of another electric groove on have the refrigerant of formation by the used projection in space, wherein refrigerant contacts with the discontinuous face that is provided with electric slot lip, refrigerant flows to pole place face from pole place face opposite face, utilize this cooling method of batteries, the heat that produces in the battery can be released into outside batteries expeditiously, can reduce the temperature difference of each battery.Thereby, can prevent the capacity volume variance of each battery, thereby can provide cycle life characteristics outstanding battery pack.
Claims (3)
1. cooling method of batteries, described battery pack is combined by a plurality of unit cells, the per unit battery keeps a plurality of cuboid electricity grooves, its inside contains the electrode group, only on certain one side, anodal and negative pole pole are arranged, at least with the contact-making surface of another electric groove on have the refrigerant of formation by the used projection in space, it is characterized in that refrigerant flows to described pole place face from described pole place face opposite face.
2. cooling method of batteries as claimed in claim 1 is characterized in that, refrigerant and discontinuous contact of electric rooved face that is provided with described projection.
3. cooling method of batteries, described battery pack is laterally placed a plurality of unit cells, the per unit battery keeps a plurality of cuboid electricity grooves, its inside contains the electrode group, only on certain one side, anodal and negative pole pole are arranged, at least with the contact-making surface of another electric groove on have the refrigerant of formation by the used projection in space, described pole place face is combined unit cells is laminated towards equidirectional, it is characterized in that refrigerant flows to described pole place face from described pole place face opposite face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97119364A CN1178398A (en) | 1996-09-30 | 1997-09-30 | Cooling method of batteries |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP258492/96 | 1996-09-30 | ||
| CN97119364A CN1178398A (en) | 1996-09-30 | 1997-09-30 | Cooling method of batteries |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1178398A true CN1178398A (en) | 1998-04-08 |
Family
ID=5175334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97119364A Pending CN1178398A (en) | 1996-09-30 | 1997-09-30 | Cooling method of batteries |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1178398A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7138205B2 (en) | 2001-10-02 | 2006-11-21 | Matsushita Electric Industrial Co., Ltd. | Battery with proportional collectors, straps, and plates |
| CN100349310C (en) * | 2003-10-10 | 2007-11-14 | 日产自动车株式会社 | Battery |
| CN100372168C (en) * | 2004-07-20 | 2008-02-27 | 乐金电子(中国)研究开发中心有限公司 | Cell of mobile communication terminal |
| CN100461526C (en) * | 2004-10-28 | 2009-02-11 | 三星Sdi株式会社 | Secondary battery module |
| US7981538B2 (en) | 2005-08-10 | 2011-07-19 | Samsung Sdi Co., Ltd. | Battery module with improved cell barrier between unit cells |
| CN101689620B (en) * | 2007-07-23 | 2012-06-27 | 丰田自动车株式会社 | Battery assembly |
-
1997
- 1997-09-30 CN CN97119364A patent/CN1178398A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7138205B2 (en) | 2001-10-02 | 2006-11-21 | Matsushita Electric Industrial Co., Ltd. | Battery with proportional collectors, straps, and plates |
| CN100382382C (en) * | 2001-10-02 | 2008-04-16 | 松下电器产业株式会社 | Battery |
| CN100349310C (en) * | 2003-10-10 | 2007-11-14 | 日产自动车株式会社 | Battery |
| CN100372168C (en) * | 2004-07-20 | 2008-02-27 | 乐金电子(中国)研究开发中心有限公司 | Cell of mobile communication terminal |
| CN100461526C (en) * | 2004-10-28 | 2009-02-11 | 三星Sdi株式会社 | Secondary battery module |
| US7746033B2 (en) | 2004-10-28 | 2010-06-29 | Samsung Sdi Co., Ltd. | Secondary battery module |
| US7981538B2 (en) | 2005-08-10 | 2011-07-19 | Samsung Sdi Co., Ltd. | Battery module with improved cell barrier between unit cells |
| US8268474B2 (en) | 2005-08-10 | 2012-09-18 | Samsung Sdi Co., Ltd. | Battery module with cell barrier between unit cells and having bending element |
| CN101689620B (en) * | 2007-07-23 | 2012-06-27 | 丰田自动车株式会社 | Battery assembly |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3355958B2 (en) | Battery cooling method | |
| KR100449983B1 (en) | A fluid cooled battery pack for a vehicle drive system | |
| US20020028375A1 (en) | Battery system | |
| US7217473B2 (en) | Mechanical and thermal improvements in metal hydride batteries, battery modules, and battery packs | |
| JP5290288B2 (en) | Medium or large battery pack with improved cooling efficiency | |
| KR101020587B1 (en) | Middle or Large-sized Battery Pack Case Providing Improved Distribution Uniformity in Coolant Flux | |
| JP3365577B2 (en) | Single-cell and unit cells of sealed nickel-hydrogen storage batteries | |
| KR100709261B1 (en) | Secondary battery module | |
| KR101097226B1 (en) | Battery pack | |
| US6372377B1 (en) | Mechanical and thermal improvements in metal hydride batteries, battery modules and battery packs | |
| US20070111089A1 (en) | Electrochemical cell for hybrid electric vehicle applications | |
| US6641951B1 (en) | Battery cell tray assembly and sytem | |
| JPH0785847A (en) | Unit cell and battery system of sealed type alkaline storage battery | |
| JPH07235326A (en) | Unit cell and unit battery for sealed type alkaline storage battery | |
| CN1134041A (en) | Unit cell for sealed alkaline storage battery | |
| KR20110070199A (en) | Battery pack | |
| US20230261308A1 (en) | Thermally conductive divider configuration for batteries | |
| CN112072008A (en) | Battery pack and vehicle | |
| CN1178398A (en) | Cooling method of batteries | |
| EP0692838B1 (en) | method for manufacturing a sealed storage battery | |
| JP3339327B2 (en) | Storage battery | |
| JP3573892B2 (en) | Assembled battery | |
| Letourneau et al. | Progress in lithium polymer battery development for telecommunication system | |
| Chilenskas et al. | Status of the Li-Al/FeS battery manufacturing technology. An evaluation for the US Army, Belvoir R and D Center. Final report | |
| MXPA99006499A (en) | Mechanical and thermal improvements in metal hydride batteries, battery modules and battery packs |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |