CN105789491A - Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle - Google Patents
Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle Download PDFInfo
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- CN105789491A CN105789491A CN201410811713.6A CN201410811713A CN105789491A CN 105789491 A CN105789491 A CN 105789491A CN 201410811713 A CN201410811713 A CN 201410811713A CN 105789491 A CN105789491 A CN 105789491A
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- Prior art keywords
- housing
- cover plate
- straight
- battery
- battery case
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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 discloses a battery housing and a preparation method thereof, a battery, a battery bank, a battery pack and an electric vehicle. The battery housing comprises a shell (1) and a cover board (2), wherein an opening is formed in at least one end of the shell (1); the cover board (2) is tightly connected with the shell (1); the cover board (2) sinks into the shell (1) and is sealed at the opening of the shell (1); the cover board (2) comprises a sunk cover board body and a cover board vertical-lift position (21); the cover board vertical-lift position (21) is located on the periphery of the cover board body and is opposite to the inner surface of the shell (1); the part, corresponding to the cover board vertical-lift position (21), of the shell (1) is a shell vertical-lift position (11); and tight connection of the cover board (2) and the shell (1) is achieved by clamping an elastic body (3) with the cover board vertical-lift position (21) and the shell vertical-lift position (11) through deformation of the shell vertical-lift position (11) and. By the battery housing disclosed by the invention, the dimensional accuracy requirements on the cover board and the shell can be reduced; and the quality of the obtained battery housing is improved.
Description
Technical field
The present invention relates to field of batteries, in particular it relates to a kind of battery case and preparation method thereof and battery, set of cells, battery bag and electric automobile.
Background technology
Battery case is the essential and important external packing body of protection battery.
The cover plate constituting battery case is coupled together with housing by currently available technology mainly by the method for laser weld, it is achieved the sealing of battery is protected.When implementing laser weld, laser is taken a round welding along cover plate perimeter weld seam.This process is high to the dimension precision requirement of cover plate and housing, and fire and the abnormal conditions splashed are exploded in existence in welding process, there is the hidden danger to battery when battery case encapsulates.And, the encapsulation calling hierarchy of battery is high, will prevent the electrolyte leakage in battery.
Accordingly, it would be desirable to improve the existing method preparing battery case, overcome the shortcoming that laser weld exists, it is provided that new battery case preparation method, it is achieved security seal and the offer better seal intensity to battery.
Summary of the invention
The invention aims to overcome in the existing method preparing battery case, dimension precision requirement is high and there is unsafe problem, it is provided that a kind of battery case and preparation method thereof and battery, set of cells, battery bag and electric automobile.
To achieve these goals, the present invention provides a kind of battery case, wherein, and housing 1 that this battery case includes at least one end opening and the cover plate 2 being tightly connected with housing 1；Cover plate 2 sinks to housing 1 internal and with housing 1 opening and seals, and cover plate 2 includes the cover board body of sinking and position 21 gone straight up to by the cover board body periphery cover plate relative with housing 1 inner surface；Going straight up to part corresponding to position 21 on housing 1 with cover plate is that housing goes straight up to position 11, and position 21 gone straight up to by cover plate and housing is gone straight up to and gone straight up to the deformation of position 11 by housing between position 11 and/or cover plate is gone straight up to the deformation grip elastomer 3 of position 21 and realized being tightly connected of cover plate 2 and housing 1.
Present invention also offers a kind of method preparing battery case, the method includes: on cover plate and contain cover plate respectively on housing and go straight up to position and housing goes straight up to position；Cover plate is put into the opening part of housing, described cover plate is gone straight up to position and goes straight up to position with described housing and align, go straight up to position and described housing is gone straight up to and is provided with elastomer between position at described cover plate；Position is gone straight up to or described housing is gone straight up to and applied electromagnetic pulse welding on position at described cover plate.
Present invention also offers a kind of battery case prepared by method provided by the invention.
Present invention also offers a kind of battery, this battery includes: battery case, and the battery core being encapsulated in this battery case；Wherein, described battery case is battery case provided by the invention.
Present invention also offers a kind of set of cells, this set of cells includes the battery of multiple series connection and/or parallel connection, and wherein, described battery is battery provided by the invention.
Present invention also offers a kind of battery bag, this battery bag includes multiple set of cells, and wherein, described set of cells is set of cells provided by the invention.
Present invention also offers a kind of electric automobile, this electric automobile includes multiple battery bag, and wherein, described battery bag is battery bag provided by the invention.
Adopt battery case provided by the invention, do not have the electromagnetic pulse of heating functioin to weld by applying on housing in preparation process, make sealing that housing generation plastic deformation realizes between cover plate with housing to step up elastomer and be connected.The method is low to the dimension precision requirement of cover plate and housing, and the security risk that when eliminating metal solder, encapsulation cell process is brought by fried fire, splashing etc..And this battery case has better seal intensity.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below.In the accompanying drawings:
Fig. 1 is the sectional view applying the front battery case of electromagnetic pulse welding；
Fig. 2 is the sectional view of the battery case that the present invention prepares.
Description of reference numerals
1 housing 2 cover plate 3 elastomer
11 housings are gone straight up to position 21 cover plate and are gone straight up to position
Detailed description of the invention
Hereinafter the specific embodiment of the present invention is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
The present invention provides a kind of battery case, wherein, and housing 1 that this battery case includes at least one end opening and the cover plate 2 being tightly connected with housing 1；Cover plate 2 sinks to housing 1 internal and with housing 1 opening and seals, and cover plate 2 includes the cover board body of sinking and position 21 gone straight up to by the cover board body periphery cover plate relative with housing 1 inner surface；Going straight up to part corresponding to position 21 on housing 1 with cover plate is that housing goes straight up to position 11, and position 21 gone straight up to by cover plate and housing is gone straight up to and gone straight up to the deformation of position 11 by housing between position 11 and/or cover plate is gone straight up to the deformation grip elastomer 3 of position 21 and realized being tightly connected of cover plate 2 and housing 1.Preferably, cover plate goes straight up to position 21 and housing is gone straight up to and gone straight up to the deformation grip elastomer 3 of position 11 by housing between position 11 and realize being tightly connected of cover plate 2 and housing 1.
Method provided by the invention does not need laser weld, it is possible to avoid the high accuracy process requirements to cover plate and the size of housing, eliminates laser beam welding simultaneously yet and fried fire or splash the product quality risk and the hidden danger that are likely to bring occur.Method provided by the invention makes cover plate or housing generation plastic deformation by electromagnetic pulse welding; compress the elastomer being placed between cover plate and housing; this elastomer produces bounce between cover plate and housing and realizes the sealing of cover plate and housing and obtain the battery case of entirety, it is achieved security seal and the protection to battery core and electrolyte.It addition, compared with the laser weld of prior art, the method for the present invention is more conducive to carry out automated production, save manufacturing cost, it is also possible to the problem that solution housing, cover plate cannot weld when being foreign material.
Fig. 2 is the side view of the battery case that the present invention prepares.Figure cover plate is gone straight up to position 21 and housing and is gone straight up to position 11 and align placement, and elastomer 3 goes straight up to position 21 and housing is gone straight up between position 11 and is enclosed within cover plate and goes straight up on position 21 at cover plate.Wherein, housing go straight up to position 11 because apply electromagnetic pulse welding and deform and extrude elastomer 3 and realize being tightly connected.
According to the invention it is preferred in situation, elastomer 3 is plastics or rubber；Preferably, described plastics are at least one in polyethylene, polypropylene and politef, but are not limited to this；Described rubber is ethylene propylene diene rubber and/or fluorubber, but is not limited to this.
According to the invention it is preferred in situation, housing goes straight up to position 11 or cover plate to go straight up to the height of position 21 be 1-20mm；Housing go straight up to position 11 and cover plate to go straight up to the gap between position 21 be 0.3-4mm.
According to the invention it is preferred in situation, cover plate 2 and housing 1 are identical or different metal；Cover plate 2 and housing 1 are rustless steel or aluminium alloy.
According to the invention it is preferred in situation, the sealing intensity between cover plate 2 and housing 1 is 0.3-8MPa；It is preferably 0.5-1.5MPa.
Present invention also offers a kind of method preparing battery case, the method includes: on cover plate 2 and contain cover plate respectively on housing 1 and go straight up to position 21 and housing goes straight up to position 11；Cover plate 2 is put into the opening part of housing 1, described cover plate is gone straight up to position 21 and goes straight up to position 11 with described housing and align, go straight up to position 21 and described housing is gone straight up to and is provided with elastomer 3 between position 11 at described cover plate；Position 21 is gone straight up to or described housing is gone straight up to and applied electromagnetic pulse welding on position 11 at described cover plate.
Fig. 1 is the side view applying the front battery case of electromagnetic pulse welding.Figure cover plate is gone straight up to position 21 and housing and is gone straight up to position 11 and align placement, and elastomer 3 goes straight up to position 21 and housing is gone straight up between position 11 and is enclosed within cover plate and goes straight up on position 21 at cover plate.Electromagnetic pulse welding is applied directly to cover plate and goes straight up to position 21 or described housing is gone straight up on position 11.Preferably, applying electromagnetic pulse welding on position 11 is gone straight up at described housing.It is more conducive to the automated production of battery case.
As it is shown in figure 1, for carrying out electromagnetic pulse welding, it is preferable that in situation, before applying electromagnetic pulse welding, described cover plate go straight up to position 21 and described housing to go straight up to the gap between position 11 be 0.5-8mm.
According to the present invention, apply electromagnetic pulse and make described housing 1 occur plastic deformation to compress elastomer 3.The welding energy of electromagnetic pulse welding obtains enough deformation, it is ensured that elastomer 3 security seal.Under preferable case, the welding energy of described electromagnetic pulse welding is 8-40KJ.
According to the invention it is preferred in situation, after applying electromagnetic pulse welding, described cover plate go straight up to position 21 and described housing to go straight up to the gap between position 11 be 0.3-4mm.Compacted elastomer 3 can be completely filled with the space between cover plate 2 and housing 1 and provide enough security seal.As shown in Figure 2.
According to the invention it is preferred in situation, the thickness of described elastomer 3 is 0.3-5mm, the height of described elastomer 3 is 1-20mm.This thickness and be highly the described elastomer 3 thickness before compacted and height, as shown in Figure 1.
According to the present invention, position 21 gone straight up to by cover plate and housing is gone straight up to the height of position 11 and ensured that electromagnetic pulse welding is normal and implement, it is thus achieved that enough seal.Under preferable case, position 21 gone straight up to by described cover plate or described housing to go straight up to the height of position 11 be 1-20mm；Preferably, described height is 2-5mm.
According to the invention it is preferred in situation, described elastomer 3 is plastics or rubber；Preferably, described elastomer is including but not limited to polyethylene, polypropylene, politef etc., or described rubber is including but not limited to ethylene propylene diene rubber, fluorubber etc.；Described cover plate 2 and housing 1 are identical or different metal；Described cover plate 2 and housing 1 can be rustless steel or aluminium alloy.Electromagnetic pulse welding can make cover plate 2 and housing 1 select different metal material according to actual needs.And same and limited optional several metals can only be welded by laser weld.
Present invention also offers a kind of battery case prepared by method provided by the invention.
Preferably, this battery case includes cover plate, housing and sealing elastomer；This sealing elastomer is between cover plate and housing.
According to the invention it is preferred in situation, the sealing intensity between described cover plate and described housing is 0.3-8MPa；It is preferably 0.5-1.5MPa.
Present invention also offers a kind of battery, this battery includes: battery case, and the battery core being encapsulated in this battery case；Wherein, described battery case is battery case provided by the invention.
Present invention also offers a kind of set of cells, this set of cells includes the battery of multiple series connection and/or parallel connection, and wherein, described battery is battery provided by the invention.
Present invention also offers a kind of battery bag, this battery bag includes multiple set of cells, and wherein, described set of cells is set of cells provided by the invention.
Present invention also offers a kind of electric automobile, this electric automobile includes multiple battery bag, and wherein, described battery bag is battery bag provided by the invention.
Hereinafter will be described the present invention by embodiment.
In following example, sealing intensity adopts BYD company air-tightness tester CPB model instrument to record by air tightness testing method.
Embodiment 1
The present embodiment is for illustrating the method preparing battery case provided by the invention.
Obtain cover plate go straight up to position and housing goes straight up to position, highly respectively 5mm as it is shown in figure 1, cover plate and housing are processed respectively.
Fluorubber elastomer sleeve is gone straight up on position at cover plate, goes straight up to position and housing is gone straight up between position at cover plate.Cover plate being gone straight up to position go straight up to position with housing and align, the gap that position gone straight up to by cover plate and housing is gone straight up between position is 3mm.
Going straight up at housing and apply electromagnetic pulse welding (PST company model PS48-16/25) on position, welding energy is 35KJ, obtains battery case as shown in Figure 2.The gap that position gone straight up to by cover plate and housing is gone straight up between position is 2mm.
The sealing intensity of the battery case of preparation is 1.2MPa, meets 0.5-1.5MPa sealing intensity requirement.
Embodiment 2
The present embodiment is for illustrating the method preparing battery case provided by the invention.
Obtain cover plate go straight up to position and housing goes straight up to position, highly respectively 2mm as it is shown in figure 1, cover plate and housing are processed respectively.
Polypropylene elastomer is enclosed within cover plate and goes straight up on position, go straight up to position and housing is gone straight up between position at cover plate.Cover plate being gone straight up to position go straight up to position with housing and align, the gap that position gone straight up to by cover plate and housing is gone straight up between position is 1.6mm.
Going straight up at housing and apply electromagnetic pulse welding (PST company model PS48-16/25) on position, welding energy is 25KJ, obtains battery case as shown in Figure 2.The gap that position gone straight up to by cover plate and housing is gone straight up between position is 1mm.
The sealing intensity of the battery case of preparation is 0.8MPa, meets 0.5-1.5MPa sealing intensity requirement.
Embodiment 3
The present embodiment is for illustrating the method preparing battery case provided by the invention.
Obtain cover plate go straight up to position and housing goes straight up to position, highly respectively 4mm as it is shown in figure 1, cover plate and housing are processed respectively.
Ethylene-propylene diene elastomer is enclosed within cover plate and goes straight up on position, go straight up to position and housing is gone straight up between position at cover plate.Cover plate being gone straight up to position go straight up to position with housing and align, the gap that position gone straight up to by cover plate and housing is gone straight up between position is 2.8mm.
Going straight up at housing and apply electromagnetic pulse welding (PST company model PS48-16/25) on position, welding energy is 28KJ, obtains battery case as shown in Figure 2.The gap that position gone straight up to by cover plate and housing is gone straight up between position is 2mm.
The sealing intensity of the battery case of preparation is 0.9MPa, meets 0.5-1.5MPa sealing intensity requirement.
By the result of above-described embodiment it can be seen that the method preparing battery case provided by the invention can obtain the satisfactory battery case of sealing property.
Claims (18)
1. a battery case, it is characterised in that housing (1) that this battery case includes at least one end opening and the cover plate (2) being tightly connected with housing (1)；Cover plate (2) sinks to housing (1) internal and with housing (1) opening and seals, and cover plate (2) includes the cover board body of sinking and position (21) gone straight up to by the cover board body periphery cover plate relative with housing (1) inner surface；Housing (1) is upper, and to go straight up to part corresponding to position (21) with cover plate be that housing goes straight up to position (11), and position (21) gone straight up to by cover plate and housing is gone straight up to and gone straight up to the deformation of position (11) by housing between position (11) and/or cover plate is gone straight up to the deformation grip elastomer (3) of position (21) and realized being tightly connected of cover plate (2) and housing (1).
2. battery case according to claim 1, wherein, cover plate goes straight up to position (21) and housing is gone straight up to and gone straight up to the deformation grip elastomer (3) of position (11) by housing between position (11) and realize being tightly connected of cover plate (2) and housing (1).
3. battery case according to claim 1 and 2, wherein, elastomer (3) is plastics or rubber；Preferably, described plastics are at least one in polyethylene, polypropylene and politef, and described rubber is ethylene propylene diene rubber and/or fluorubber.
4. battery case according to claim 1 and 2, wherein, housing goes straight up to position (11) or cover plate to go straight up to the height of position (21) be 1-20mm；Housing go straight up to position (11) and cover plate to go straight up to the gap between position (21) be 0.3-4mm.
5. battery case according to claim 1 and 2, wherein, cover plate (2) and housing (1) are identical or different metal；Cover plate (2) and housing (1) are rustless steel or aluminium alloy.
6. the battery case according to any one in claim 1-5, wherein, the sealing intensity between cover plate (2) and housing (1) is 0.3-8MPa；It is preferably 0.5-1.5MPa.
7. the method preparing battery case, the method includes: on cover plate and contain cover plate respectively on housing and go straight up to position and housing goes straight up to position；Cover plate is put into the opening part of housing, described cover plate is gone straight up to position and goes straight up to position with described housing and align, go straight up to position and described housing is gone straight up to and is provided with elastomer between position at described cover plate；Position is gone straight up to or described housing is gone straight up to and applied electromagnetic pulse welding on position at described cover plate.
8. method according to claim 7, wherein, the welding energy of described electromagnetic pulse welding is 8-40KJ.
9. method according to claim 7, wherein, position gone straight up to by described cover plate or described housing to go straight up to the height of position be 1-20mm；Preferably, described height is 2-5mm.
10. method according to claim 7, wherein, before applying electromagnetic pulse welding, the gap that position gone straight up to by described cover plate and described housing is gone straight up between position is 0.5-8mm；After applying electromagnetic pulse welding, the gap that position gone straight up to by described cover plate and described housing is gone straight up between position is 0.3-4mm.
11. method according to claim 7, wherein, the thickness of described elastomer is 0.3-5mm, and the height of described elastomer is 1-20mm.
12. method according to claim 7, wherein, described elastomer is plastics or rubber；Preferably, described plastics are at least one in polyethylene, polypropylene and politef, and described rubber is EPDM and/or fluorubber；Described cover plate and housing are identical or different metal；Described cover plate and housing can be rustless steel or aluminium alloy.
13. method according to claim 7, wherein, go straight up at described housing and position applies electromagnetic pulse welding.
14. the battery case that the method described in any one in claim 7-13 prepares.
15. a battery, this battery includes: battery case, and the battery core being encapsulated in this battery case；Wherein, described battery case is the battery case in claim 1-6 and 14 described in any one.
16. a set of cells, this set of cells includes the battery of multiple series connection and/or parallel connection, and wherein, described battery is the battery described in claim 15.
17. a battery bag, this battery bag includes multiple set of cells, and wherein, described set of cells is the set of cells described in claim 16.
18. an electric automobile, this electric automobile includes multiple battery bag, and wherein, described battery bag is the battery bag described in claim 17.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811713.6A CN105789491A (en) | 2014-12-23 | 2014-12-23 | Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410811713.6A CN105789491A (en) | 2014-12-23 | 2014-12-23 | Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN105789491A true CN105789491A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410811713.6A Pending CN105789491A (en) | 2014-12-23 | 2014-12-23 | Battery housing and preparation method thereof, battery, battery bank, battery pack and electric vehicle |
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| CN (1) | CN105789491A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224103A (en) * | 2019-07-25 | 2019-09-10 | 蜂巢能源科技有限公司 | Preparation method for the tab of battery, lithium ion battery and lithium ion battery |
| CN113927164A (en) * | 2021-12-16 | 2022-01-14 | 铭镭激光智能装备（河源）有限公司 | Aluminum-shell battery flexible connection laser welding device |
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| US5979694A (en) * | 1997-04-09 | 1999-11-09 | Techmatics, Inc. | Pressure canister |
| CN103208594A (en) * | 2012-12-04 | 2013-07-17 | 丁振荣 | Method for sealing and fixing cylindrical battery cell, battery and shell cover |
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2014
- 2014-12-23 CN CN201410811713.6A patent/CN105789491A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5979694A (en) * | 1997-04-09 | 1999-11-09 | Techmatics, Inc. | Pressure canister |
| CN103208594A (en) * | 2012-12-04 | 2013-07-17 | 丁振荣 | Method for sealing and fixing cylindrical battery cell, battery and shell cover |
Non-Patent Citations (1)
| Title |
|---|
| S.D. KORE等: "Electromagnetic impact welding of aluminum to stainless steel sheets", 《JOURNAL OF MATERIALS PROCESSING TECHNOLOGY》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110224103A (en) * | 2019-07-25 | 2019-09-10 | 蜂巢能源科技有限公司 | Preparation method for the tab of battery, lithium ion battery and lithium ion battery |
| CN113927164A (en) * | 2021-12-16 | 2022-01-14 | 铭镭激光智能装备（河源）有限公司 | Aluminum-shell battery flexible connection laser welding device |
| CN113927164B (en) * | 2021-12-16 | 2022-03-22 | 铭镭激光智能装备（河源）有限公司 | Aluminum-shell battery flexible connection laser welding device |
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Application publication date: 20160720 |
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