CN201134448Y - Housing of high-capacity lithium ion power cell - Google Patents
Housing of high-capacity lithium ion power cell Download PDFInfo
- Publication number
- CN201134448Y CN201134448Y CNU2007200974076U CN200720097407U CN201134448Y CN 201134448 Y CN201134448 Y CN 201134448Y CN U2007200974076 U CNU2007200974076 U CN U2007200974076U CN 200720097407 U CN200720097407 U CN 200720097407U CN 201134448 Y CN201134448 Y CN 201134448Y
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- China
- Prior art keywords
- housing
- battery
- safety valve
- capacity lithium
- upper cover
- 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.)
- Expired - Fee Related
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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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- Sealing Battery Cases Or Jackets (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses a high capacity lithium power battery housing capable of guaranteeing battery safety and battery heat radiation capacity during process of charging and discharging. The high capacity lithium power battery housing is realized according to the following technical scheme of comprising a housing side wall and a housing upper cover, wherein the housing side wall is composed of two long side walls and two short side walls, the long side walls are provided with reinforcement ribs, the housing upper cover is provided with a boss on circumference edge of the housing upper cover, a groove is arranged at the top end of the housing body side wall, and the boss is engaged with the groove, further a housing vent hole is arranged on the housing upper cover, an aluminum plate with notch or indentation on perimeter is fixed above the housing vent hole and arranged inside a safety valve cover, furthermore, the safety valve cover is fixed with a battery upper cover, and a valve body vent hole is arranged on the top of the safety valve cover. By arranging reinforcement ribs on two large sides of the housing, integral intensity of the housing is increased. By arranging the safety valve, when the battery internal is in overpressure, the aluminum plate in the middle of the safety valve turns over outwards then is open to release pressure, thereby avoiding personal injury caused by battery explosion. Furthermore, by scoring notch on the periphery of the aluminum plate of the safety valve, safety valve reliability is increased.
Description
Technical field
The utility model relates to field of batteries, in particular, relates to a kind of high-capacity lithium-ion power battery external shell structure.
Background technology
Lithium ion battery compare with the battery of other types such as plumbic acid, cadmium nickel have that specific capacity is big, operating voltage is high, charging rate is fast, operating temperature range is wide, have extended cycle life, advantages such as volume is little, light weight.At present, be widely used in fields such as mobile phone, notebook computer, electric tool, and its range of application more and more widely.
Along with the maturation of electric vehicle engineering and perfect day by day, the dream that electric automobile, hybrid vehicle are come into daily life to be becoming possibility, and breeding huge business opportunity in the process that electric automobile is popularized.And the quality of vehicle-mounted great-capacity power battery performance directly affects the overall performance of electric automobile.This is electric automobile vehicle mounted dynamic battery have higher requirement (such as will having higher fail safe, bigger specific capacity, weight is lighter).But the available dynamic battery container is processed into by stainless steel materials, though mechanical strength meets the requirement of electrokinetic cell, its battery container weight is bigger.Great-capacity power battery generates heat more serious in charge and discharge process, and the stainless steel material thermal conductivity is low, and it is insufficient to cause dispelling the heat in the battery operated process, and temperature is too high, causes cell safety hidden danger easily, influences the normal use of battery.In order to improve the fail safe of battery, common lithium ion battery all is provided with safety device, housing indentation type for example, Copper Foil type or the like.But existing safety device all has certain defective.With housing indentation type is example, if indentation is dark excessively, battery container will not destroyed when reaching threshold pressure; If indentation is shallow excessively, indentation is not opened when the housing internal pressure surpasses threshold pressure, and indentation does not play safety effect.Copper Foil type safety valve (safety device) also is like this.The sealing of battery also is technological difficulties and the emphasis in the great-capacity power battery manufacturing process.If battery sealing-performance is bad, cause battery leakage easily, influence the various performance parameters of lithium battery and finally cause battery can't continue to use.
The utility model content
In order to solve the problems of the technologies described above, the utility model is improved to electric automobile or hybrid-electric car by battery container material and structure, provide a kind of and can guarantee battery security (insulation property and sealing property), guarantee battery heat dispersion in charge and discharge process, the high-capacity lithium-ion power battery housing of control battery charging and discharging working temperature.
The utility model high-capacity lithium-ion power battery housing is achieved by following technical proposals, comprises housing sidewall and case top lid, and described housing sidewall is made up of two long sidewalls and two short sidewalls, and long sidewall is provided with the reinforcement gusset; The case top lid edge is provided with boss, and body sidewall top is provided with groove, and described boss matches with groove; Described case top lid is provided with the housing air vent, housing air vent upper fixed aluminium sheet; Aluminium sheet is arranged in the safe valve gap, and the aluminium sheet periphery is provided with indentation or impression; Safe valve gap and cell cover are fixed, and the safety valve tops is provided with the valve body air vent.
The utility model battery container is an aluminum alloy material.
Gusset is strengthened at least three of the long sidewall settings of housing, and middle gusset width is greater than other gusset width.The gusset width is greater than other gusset width wherein, and its reason is that deformation maximum in middle part so just can reduce shell deformation to greatest extent when inner pressure of battery increases the generation expansion.
In the groove of body sidewall top the quad seal pad is set
Cell cover central authorities are provided with relief valve device, the explosion hazard that cause to prevent excessive when inner pressure of battery.Safety valve is made by aluminium sheet, is carved with indentation around it.
The utlity model has following beneficial effect:
Battery container is an aluminum alloy materials, compares with stainless steel material, and aluminium density is little, in light weight, good heat-transfer, assembly precision height.Replace stainless steel material to help the heat radiation of great-capacity power battery with casting aluminium material, reduce battery operated temperature, improve battery security.Under the production in enormous quantities situation, cast aluminum can also reduce the housing processing cost.But because the mechanical strength of aluminium is lower than stainless steel, so the utility model is provided with the reinforcement gusset respectively at two long sidewalls of housing, to improve the bulk strength of housing.Because shell length and thickness ratio are 2～3: about 1, so two short sidewalls are not provided with gusset.The utility model Shell model has passed through the analysis of ANSYS finite element software, and short sidewall of housing and long sidewall meet the engineering strength requirement fully.By the cooperation of loam cake boss and body groove, the middle in addition quad seal pad that is provided with makes the sealing property of battery container improve a lot than other shell structures.The utility model electrokinetic cell is provided with safety valve, and excessive when cell internal pressure, the aluminium sheet in the middle of the safety valve outwards overturns to open and lays down internal pressure, has avoided battery explosion to hurt sb.'s feelings.Be carved with indentation around the safety valve aluminium sheet, improved the reliability of safety valve.
Description of drawings
Fig. 1 is a large-capacity power lithium battery shell structure schematic diagram;
Fig. 2 is a large-capacity power lithium battery case top lid schematic diagram.
Embodiment
The utility model is a high-capacity lithium-ion power battery external shell structure.With the 100Ah high-capacity lithium-ion power battery is that example is described further the utility model in conjunction with the accompanying drawings.
As shown in Figure 1, case top lid is provided with safe valve gap 1, housing sidewall is made up of two long sidewalls and two short sidewalls, long sidewall is provided with the reinforcement gusset, wherein two big sides of battery container are respectively arranged with 7 reinforcement gussets, and wherein six roots of sensation small gusset 4, and middle gusset is big gusset 5 (width is greater than other six roots of sensation gussets), because shell length and thickness ratio are 2～3: about 1, so two little sides are not provided with gusset; The case top lid edge is provided with boss, and body sidewall top is provided with groove, and described boss matches with groove; As shown in Figure 2, cell cover is provided with housing air vent 3, housing air vent upper fixed aluminium sheet 2; Aluminium sheet is arranged in the safe valve gap 1, and safe valve gap and cell cover are fixed; The safety valve tops is provided with valve body air vent 6, and aluminium sheet 2 is arranged in the safe valve gap; The aluminium sheet periphery is provided with indentation or impression.Wherein safety valve adopts novel score structure, and by scribe circular score line on the safety valve aluminium sheet, safety valve goes out to wash open at indentation when inner pressure of battery surpasses safe threshold values, discharges internal pressure, avoids the generation of accident.Because previous housing of power cell generally adopts stainless steel material, and the material of the utility model housing of power cell is an aluminium alloy, so material and the whole stiffness of housing are wanted special concern.This patent is used Pro/Engineer software and is drawn the battery container threedimensional model, utilizes the ANSYS finite element software to simulate stress and distortion at 1Mp pressure body then, makes housing distortion be issued to minimum in uniform pressure by changing shell structure.And optimize Shell model reduces its weight as far as possible.
Claims (4)
1. a high-capacity lithium-ion power battery housing comprises housing sidewall and case top lid, it is characterized in that, described housing sidewall is made up of two long sidewalls and two short sidewalls, and long sidewall is provided with the reinforcement gusset; The case top lid edge is provided with boss, and body sidewall top is provided with groove, and described boss matches with groove; Described case top lid is provided with the housing air vent, housing air vent upper fixed aluminium sheet; Aluminium sheet is arranged in the safe valve gap, and the aluminium sheet periphery is provided with indentation or impression; Safe valve gap and cell cover are fixed, and the safety valve tops is provided with the valve body air vent.
2. high-capacity lithium-ion power battery housing according to claim 1 is characterized in that, gusset is strengthened at least three of described long sidewall settings, and middle gusset width is greater than other gusset width.
3. high-capacity lithium-ion power battery housing according to claim 1 is characterized in that, in the groove of described body sidewall top the quad seal pad is set.
4. high-capacity lithium-ion power battery housing according to claim 1 is characterized in that, described battery container is an aluminum alloy materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200974076U CN201134448Y (en) | 2007-10-31 | 2007-10-31 | Housing of high-capacity lithium ion power cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200974076U CN201134448Y (en) | 2007-10-31 | 2007-10-31 | Housing of high-capacity lithium ion power cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201134448Y true CN201134448Y (en) | 2008-10-15 |
Family
ID=40062716
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200974076U Expired - Fee Related CN201134448Y (en) | 2007-10-31 | 2007-10-31 | Housing of high-capacity lithium ion power cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201134448Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010124566A1 (en) * | 2009-04-30 | 2010-11-04 | Byd Company Limited | Power battery module |
| CN102473864A (en) * | 2009-07-31 | 2012-05-23 | 戴姆勒股份公司 | Galvanic cell having overpressure protection |
-
2007
- 2007-10-31 CN CNU2007200974076U patent/CN201134448Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010124566A1 (en) * | 2009-04-30 | 2010-11-04 | Byd Company Limited | Power battery module |
| CN102473864A (en) * | 2009-07-31 | 2012-05-23 | 戴姆勒股份公司 | Galvanic cell having overpressure protection |
| CN102473864B (en) * | 2009-07-31 | 2015-03-18 | 戴姆勒股份公司 | Galvanic cell having overpressure protection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081015 Termination date: 20121031 |