CN105489811A - Preparation method for safe battery pack - Google Patents
Preparation method for safe battery pack Download PDFInfo
- Publication number
- CN105489811A CN105489811A CN201410478120.2A CN201410478120A CN105489811A CN 105489811 A CN105489811 A CN 105489811A CN 201410478120 A CN201410478120 A CN 201410478120A CN 105489811 A CN105489811 A CN 105489811A
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- Prior art keywords
- battery pack
- battery
- cover
- valve seat
- described process
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention relates to a preparation method for a safe battery pack. The preparation method comprises the steps of (1) preparing a battery pack shell and a battery pack cover, wherein a release valve base is arranged on the battery pack cover; a battery pack general positive terminal and a battery pack general negative terminal are inserted in the battery pack cover in a sealing and fixed manner; (2) isolating multiple adjacent single batteries by insulating blocks, and putting the single batteries into the battery pack shell; (3) sealing and welding the battery pack cover and the battery pack shell into one body; and (4) filling the gap in the battery pack shell with a fire extinguishing agent through a funnel. According to the preparation method for the safe battery pack, the internal residual space of the battery pack is filled with the fire extinguishing agent; when a single battery in the battery pack is burnt, a diaphragm, a metal foil and other solid combustible in the battery are isolated from the air; carbon tetrachloride with chemical inertness volatizes at a high temperature to dilute electrolyte solvent vapor of the battery so as to enable a combustion range to be limited in the burnt single battery in the battery pack without burning other normal single batteries in the battery pack in order to avoid fire spreading; and therefore, the safe battery pack has a function of extinguishing fire in the interior of the battery pack, so that the safety of the battery pack is ensured.
Description
Technical field
The invention belongs to power supply series technique field, particularly relate to a kind of preparation method of safety battery group.
Background technology
In recent years, increasingly extensive along with battery applications, the example of battery generation security incident is also of common occurrence.
For battery.Lithium battery is inner when Charging state has put aside huge energy, once control improper when the ambient temperature residing for lithium battery etc. or internal short-circuit, the accidents such as lithium battery is very easily blasted, catch fire occurring.When a battery has an accident if do not adopt appropriate measures, other batteries contiguous can be involved, cause fire spreading, then cause larger accident.
Find through retrieval, application number is 201120323564.0, publication number is CN202282390U, name is called: the patent of invention of the cell safety case of explosion-proof flame-retardant.This invention comprises battery pack and stuffing box, described stuffing box comprises casing and top cover, described top cover is connected with box sealing, described battery pack is positioned at described casing, described top cover is installed fin, positive conductive terminal and cathode conductive terminal, described top cover is installed to vacuumize and is filled with the gas valve of inert gas.This invention to a certain degree improves the fail safe of battery.But when adopting the safety box described in this invention to store Charging state lithium battery, because battery self has the ability that redox reaction occurs, if therefore in the situation such as battery generation internal short-circuit, box interior temperature is very high, when exceeding the limit of metal cabinet self, casing will cave in, and cells burst blast etc. also can not be stoped to involve situation outside case even if be filled with inert gas in safety box.And usually lithium battery is all charged-state storage.Therefore this patent there is no practical significance.
Also find through retrieval, application number is 200920266418.1, publication number is CN201528016U, name is called: the patent of invention of oil immersion cell box.This invention is full of transformer oil at the remaining space of battery pack except battery cell, pole.Be full of transformer oil at the remaining space of battery pack, the heat dispersion of battery can be improved, and shed by the heat radiation that contacts with transformer oil is stupefied at battery pack adstante febre heat.This method can play protection battery to a certain extent when battery pack normally uses, and battery temperature can not be raised a lot.But when there being Individual cells inside that the faults such as internal short-circuit occur in battery pack, battery can burn.Because inside battery has Oxidizing and Reducing Agents; do not need external oxygen with regard to incendivity; and the now arc extinguishing effect of transformer oil can not play a protective role to battery pack; it is contrary to the intensity of a fire increases; because transformer main body of oil is alkane; at high temperature and be flammable when having air to exist, therefore the existence of transformer oil can help to rise the intensity of a fire on the contrary.Therefore this patent there is no practical application meaning.
As can be seen here, in order to avoid the situations such as initiation fire of being exploded by a batteries caught fire, need a kind of fire control that a battery can be caused or the device limited within the specific limits, prevent fire spreading from causing larger loss.
Summary of the invention
The present invention provides a kind of and can produce the control of fire of the cell of fire in the inside of this cell, the preparation method of a kind of safety battery group avoiding fire spreading to spread to battery pack outside for solving in known technology the technical problem that exists.
The present invention includes following technical scheme:
A preparation method for safety battery group, is characterized in: comprise following manufacturing process:
(1) make inwall and be stained with the battery housing of insulation board and supporting and have the battery pack cover in three holes with battery housing, the female disappointing valve seat of one of them eyelet welding tape splicing, a hole sealing in other two apertures is installed with the total plus end of battery pack admittedly, another hole seals and is admittedly installed with the total negative terminal of battery pack;
(2) a plurality of cell is connected into the positive terminal after one and is loaded into one with total plus end in battery pack cover, the negative pole end after a plurality of cell is connected into one and the total negative terminal in battery pack cover are loaded into integrally; With collets isolation between neighboring unit cell, a plurality of cell is parallel to each other and is placed in battery housing;
By battery pack cover and battery housing seal welding integral;
(4) with funnel, extinguishing chemical is injected in battery housing from the opening part of disappointing valve seat, makes extinguishing chemical be filled into the gap of battery housing; After rupture pressure disc being placed in the bottom of disappointing valve seat, screwing in lose heart in the internal thread of valve seat with external screw thread bolt with holes, the periphery sealing of rupture pressure disc is fixed on disappointing valve seat, completes the manufacturing process of safety battery group of the present invention.
The present invention can also adopt following technical measures:
Described process (4) middle extinguishing chemical is the mixture of quality 50% ammonium dihydrogen phosphate, 25% ammonium sulfate and 25% carbon tetrachloride.
Described process (1) in the glass epoxy of insulation board to be thickness be 0.2mm, it is integral that battery housing and glass epoxy pass through silicone adhesive; Described process (1) middle collets is polytetrafluoroethylene block.
Described process (4) middle rupture pressure disc is the aluminum plastic film of thickness 0.15mm.
The described process (1) middle total plus end material of battery pack is LY12 aluminium alloy; A polypropylene insulation sealing ring is had between total plus end and battery pack cover.
The described process (1) middle total negative terminal material of battery pack is Y2 red copper; A material is had to be polyacrylic insulator seal ring between total negative terminal and battery pack cover.
The advantage that the present invention has and good effect:
The present invention fills extinguishing chemical at internal battery pack remaining space, when in battery pack during certain monomer combustion, its heat can impel the ingredient breakdown of extinguishing chemical, decomposition reaction is the endothermic reaction, not only playing cooling effect makes battery pack lower the temperature rapidly, and catabolite can form solid combustible and the air exclusion such as barrier film, metal forming that glassy cover layer makes in battery; In addition chemically inert carbon tetrachloride at high temperature volatilizees and can dilute battery electrolyte solvent vapo(u)r, thus combustion range can be made to be only limitted to bad monomer inside in battery pack, and other normal monomers in battery pack can not be involved, avoid fire spreading, there is the function of internal battery pack knock down the flame, ensure that the fail safe of battery pack.
Accompanying drawing explanation
Fig. 1 is safety battery group internal structure schematic diagram prepared by the present invention.
In figure: 1-battery housing, 2-cell, 3-eye bolt, 4-positive terminal, 5-insulator seal ring, the total plus end of 6-battery pack, 7-battery pack cover, 8-aluminum plastic film, 9-negative pole end, the total negative terminal of 10-battery pack, 11-extinguishing chemical, 12-glass epoxy, 13-loses heart valve seat, 14-polytetrafluoroethylene block.
Embodiment
For summary of the invention of the present invention, Characteristic can be disclosed further, be described in detail as follows especially exemplified by following instance.
Embodiment:
The manufacturing process of safety battery group of the present invention
(1) make 1 wide * of long * thick=102mm*102mm*1mm stainless steel substrates is as battery pack cover 7, battery pack case covers and is shaped with 3 holes, interstitial hole is welded with the disappointing valve seat 13 of band M12 internal thread, a hole in the hole at two ends is equipped with the total plus end 6 of battery pack, the total plus end material of battery pack is LY12 aluminium alloy.There is a material to be polyacrylic insulator seal ring 5 between the total plus end of battery pack and battery pack cover, make battery pack total plus end deformation extruding insulation sealing ring reach the effect of compression seal by punching press.The total negative terminal 10 of battery pack of Y2 red copper material another hole in two stomidiums is equipped with, there is a material to be polyacrylic insulator seal ring between the total negative terminal of battery pack and battery pack cover, make battery pack total negative terminal deformation extruding insulation sealing ring reach the effect of compression seal by punching press.
(2) make 1 interior minister * height * thick=the uncovered Stainless Steel Shell of 100mm*100mm*100mm as battery housing 1, the wall thickness of battery housing is 1mm; Battery housing inwall silica gel glues the glass epoxy 12 that a layer thickness is 0.2mm.
(3) select 8 case materials to be the cell 2 of aluminium alloy, the long * height * of each cell is thick=95mm*80mm*10mm; The capacity of each cell is 5Ah; 8 cells are connected into the positive terminal 4 after one by the total plus end 6 of battery pack in ultrasonic bond welding battery pack cover, on the total negative terminal 10 of battery pack that negative pole end 9 is welded in battery pack cover by ultrasonic bond.
(4) 8 cells after process (3) being connected are parallel to each other and are placed in battery housing, separate between neighboring unit cell with polytetrafluoroethylene block 14, and battery pack cover and battery housing adopt argon arc welding to weld together; By funnel, the ammonium dihydrogen phosphate in extinguishing chemical 11 and ammonium sulfate powder are injected in battery housing from the opening part of disappointing valve seat, shake battery pack gently, extinguishing chemical powder is fully distributed in each cell gap, by funnel, carbon tetrachloride is injected battery housing inside.Each component ratio of extinguishing chemical is ammonium dihydrogen phosphate 50%, ammonium sulfate 25%, carbon tetrachloride 25%, and the total amount injecting battery container inside is 100g; Be the aluminum plastic film 8 of 0.15mm by thickness, be placed on the bottom of disappointing valve seat 13, compress with a trough of belt M12 external screw thread eye bolt 3 and the periphery fixing aluminum plastic film by stack seal, complete the manufacturing process of safety battery group as shown in Figure 1.
The present invention can be used for making safety lithium ion cell group, can also make safe Nickel-Hydrogen batteries, safe Cd Ni battery, safe lead-acid battery group etc., have use value widely.
Operation principle of the present invention:
When in battery pack during some monomer combustion, its heat can impel the composition of extinguishing chemical to decompose, decomposition reaction is the endothermic reaction, playing cooling effect on the one hand makes battery pack lower the temperature rapidly, and catabolite can form the barrier film that glassy cover layer makes in battery, the solid combustibles such as metal forming and air exclusion, chemically inert carbon tetrachloride at high temperature volatilizees and can dilute battery electrolyte solvent vapo(u)r on the other hand, thus combustion range can be made to be only limitted to bad monomer inside in battery pack, and other normal monomers in battery pack can not be involved, avoid fire spreading, reach the object at internal battery pack knock down the flame, drastically increase the fail safe of battery pack.
Although be described the preferred embodiments of the present invention above; but the present invention is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not departing under the ambit that present inventive concept and claim protect, a lot of form can also be made.These all belong within protection scope of the present invention.
Claims (6)
1. a preparation method for safety battery group, is characterized in that: comprise following manufacturing process:
(1) make inwall and be stained with the battery housing of insulation board and supporting and have the battery pack cover in three holes with battery housing, the female disappointing valve seat of one of them eyelet welding tape splicing, a hole sealing in other two apertures is installed with the total plus end of battery pack admittedly, another hole seals and is admittedly installed with the total negative terminal of battery pack;
(2) a plurality of cell is connected into the positive terminal after one and is loaded into one with total plus end in battery pack cover, the negative pole end after a plurality of cell is connected into one and the total negative terminal in battery pack cover are loaded into integrally; With collets isolation between neighboring unit cell, a plurality of cell is parallel to each other and is placed in battery housing;
By battery pack cover and battery housing seal welding integral;
(4) with funnel, extinguishing chemical is injected in battery housing from the opening part of disappointing valve seat, makes extinguishing chemical be filled into the gap of battery housing; After rupture pressure disc being placed in the bottom of disappointing valve seat, screwing in lose heart in the internal thread of valve seat with external screw thread bolt with holes, the periphery sealing of rupture pressure disc is fixed on disappointing valve seat, completes the manufacturing process of safety battery group of the present invention.
2. a kind of high security battery pack according to claim 1, is characterized in that: described process (4) in extinguishing chemical be the mixture of quality 50% ammonium dihydrogen phosphate, 25% ammonium sulfate and 25% carbon tetrachloride.
3. a kind of high security battery pack according to claim 1, is characterized in that: described process (1) in the glass epoxy of insulation board to be thickness be 0.2mm, it is integral that battery housing and glass epoxy pass through silicone adhesive; Described process (1) middle collets is polytetrafluoroethylene block.
4. a kind of high security battery pack according to claim 1, is characterized in that: described process (4) in rupture pressure disc be the aluminum plastic film of thickness 0.15mm.
5. a kind of high security battery pack according to claim 1, is characterized in that: described process (1) in the total plus end material of battery pack be LY12 aluminium alloy; A polypropylene insulation sealing ring is had between total plus end and battery pack cover.
6. a kind of high security battery pack according to claim 1, is characterized in that: described process (1) in the total negative terminal material of battery pack be Y2 red copper; A material is had to be polyacrylic insulator seal ring between total negative terminal and battery pack cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478120.2A CN105489811A (en) | 2014-09-18 | 2014-09-18 | Preparation method for safe battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410478120.2A CN105489811A (en) | 2014-09-18 | 2014-09-18 | Preparation method for safe battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN105489811A true CN105489811A (en) | 2016-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410478120.2A Pending CN105489811A (en) | 2014-09-18 | 2014-09-18 | Preparation method for safe battery pack |
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| CN (1) | CN105489811A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018157558A1 (en) * | 2017-02-28 | 2018-09-07 | 宁德时代新能源科技股份有限公司 | Battery module |
| WO2019037366A1 (en) * | 2017-08-23 | 2019-02-28 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN110120567A (en) * | 2019-05-09 | 2019-08-13 | 华东交通大学 | One kind being based on phase-change heat transfer and CO218650 battery modules of thermal protection |
| US10967210B2 (en) | 2019-03-25 | 2021-04-06 | Volkswagen Aktiengesellschaft | Transportation vehicle power safety |
| CN112803104A (en) * | 2021-01-13 | 2021-05-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Pressure-resistant high-volume-ratio energy battery pack and welding method thereof |
| WO2022012449A1 (en) * | 2020-07-16 | 2022-01-20 | 哲弗智能系统（上海）有限公司 | Passive fire extinguishing device and battery pack |
Citations (4)
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| CN1996640A (en) * | 2006-01-04 | 2007-07-11 | 株式会社Lg化学 | Medium- or large-sized battery pack having safety device |
| CN103125039A (en) * | 2010-08-19 | 2013-05-29 | 锂电池科技有限公司 | Electrochemical energy store having a multiplicity of electrochemical cells |
| CN103825059A (en) * | 2014-02-13 | 2014-05-28 | 浙江吉利控股集团有限公司 | Heat management and automatic-fire extinguishing system for vehicle battery |
| CN203800094U (en) * | 2014-04-14 | 2014-08-27 | 浙江君飞科技有限公司 | Storage battery with fire prevention function |
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2014
- 2014-09-18 CN CN201410478120.2A patent/CN105489811A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1996640A (en) * | 2006-01-04 | 2007-07-11 | 株式会社Lg化学 | Medium- or large-sized battery pack having safety device |
| CN103125039A (en) * | 2010-08-19 | 2013-05-29 | 锂电池科技有限公司 | Electrochemical energy store having a multiplicity of electrochemical cells |
| CN103825059A (en) * | 2014-02-13 | 2014-05-28 | 浙江吉利控股集团有限公司 | Heat management and automatic-fire extinguishing system for vehicle battery |
| CN203800094U (en) * | 2014-04-14 | 2014-08-27 | 浙江君飞科技有限公司 | Storage battery with fire prevention function |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018157558A1 (en) * | 2017-02-28 | 2018-09-07 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN108511660A (en) * | 2017-02-28 | 2018-09-07 | 宁德时代新能源科技股份有限公司 | Battery module |
| CN108511660B (en) * | 2017-02-28 | 2020-08-28 | 宁德时代新能源科技股份有限公司 | Battery module |
| WO2019037366A1 (en) * | 2017-08-23 | 2019-02-28 | 宁德时代新能源科技股份有限公司 | Battery module |
| US10967210B2 (en) | 2019-03-25 | 2021-04-06 | Volkswagen Aktiengesellschaft | Transportation vehicle power safety |
| CN110120567A (en) * | 2019-05-09 | 2019-08-13 | 华东交通大学 | One kind being based on phase-change heat transfer and CO218650 battery modules of thermal protection |
| CN110120567B (en) * | 2019-05-09 | 2024-04-02 | 华东交通大学 | Based on phase transition heat transfer and CO 2 18650 battery module with heat protection function |
| WO2022012449A1 (en) * | 2020-07-16 | 2022-01-20 | 哲弗智能系统（上海）有限公司 | Passive fire extinguishing device and battery pack |
| CN112803104A (en) * | 2021-01-13 | 2021-05-14 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Pressure-resistant high-volume-ratio energy battery pack and welding method thereof |
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Application publication date: 20160413 |