CN105789501A - Battery pack body and preparation method thereof, battery pack and electric vehicle - Google Patents
Battery pack body and preparation method thereof, battery pack and electric vehicle Download PDFInfo
- Publication number
- CN105789501A CN105789501A CN201410814903.3A CN201410814903A CN105789501A CN 105789501 A CN105789501 A CN 105789501A CN 201410814903 A CN201410814903 A CN 201410814903A CN 105789501 A CN105789501 A CN 105789501A
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- battery
- turn
- edge
- inclusion
- pallet
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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)
Abstract
The invention discloses a battery pack body and a preparation method thereof, a battery pack and an electric vehicle. The battery pack body comprises a tray and a seal cover, wherein an opening is formed in one end of the tray; and the edge of an open end of the tray is connected with the edge of the seal cover in an atom binding manner. The battery pack body disclosed by the invention can have relatively good connection strength and sealing property.
Description
Technical field
The present invention relates to a kind of battery inclusion and preparation method thereof and battery bag and electric automobile.
Background technology
Battery inclusion for being protected from impact by battery module.Battery inclusion generally has multiple part, and the connection between various piece needs to seal, to protect the battery module in battery bag.
The mode that existing battery inclusion is generally adopted gluing realizes sealing.There is aging problem in glue, there is the risk causing seal failure owing to glue is aging during life-time service.So that screw can be adopted to be attached, but sealing effectiveness is still not enough, and implements complex process during automated production.
As can be seen here, in order to realize the good protection of battery module, it is desirable to provide a kind of new battery inclusion, there is reliable sealing property and bond strength.
Summary of the invention
The invention aims to realize the better protection of battery module, it is provided that a kind of new battery inclusion and preparation method thereof and battery bag and electric automobile.
To achieve these goals, the present invention provides a kind of battery inclusion, and this battery inclusion includes: the pallet of one end open and sealing lid；The mode combined by atom between edge and the edge of described sealing lid of the opening of described pallet is attached.
The preparation method that the present invention also provides for a kind of battery inclusion, the method includes: by sealing the top that lid is positioned over the opening of pallet, being placed as join domain interval at the edge of the edge sealing lid and the opening of pallet, gap is 0.5-3mm；Adopt electromagnetic pulse to be welded on described join domain to weld.
The present invention also provides for a kind of battery inclusion prepared by method provided by the invention.
The present invention also provides for a kind of battery bag, and this battery bag includes battery inclusion and the battery module being encapsulated in this battery inclusion, and wherein, described battery inclusion is battery inclusion provided by the invention.
The present invention also provides for a kind of electric automobile, and this electric automobile includes multiple battery bag, and wherein, described battery bag is battery bag provided by the invention.
Battery inclusion provided by the invention is with atom combination connecting trays and seals lid, it is ensured that battery inclusion has better bonding strength and sealing property, and reliability is high, facilitates automated production.
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 welded schematic diagram of one (for partial enlargement in circle) of the battery inclusion of the present invention；
Fig. 2 is the welded schematic diagram of another kind (for partial enlargement in circle) of the battery inclusion of the present invention；
Fig. 3 is the structural representation of the battery inclusion of the present invention；
Fig. 4 is the metallograph (in square frame, weld is without transition zone) of electromagnetic pulse of the present invention weldering weld；
Fig. 5 is the metallograph (in circle, weld is transition zone) of Laser Welding weld；
Fig. 6 is the metallograph of Laser Welding weld new life alloy fracture.
Description of reference numerals
1, pallet 2, seal lid 3, battery module 4, joint gap
5, join domain 6, inverted v-shaped 7, turn-up portion 8, brim part
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 invention provides a kind of battery inclusion, this battery inclusion includes: the pallet of one end open and sealing lid；The mode combined by atom between edge and the edge of described sealing lid of the opening of described pallet is attached.
The present inventor finds under study for action, owing to needs seal large-sized battery pack, the common length, width and height size of battery inclusion needs to reach (180-210) × (90-100) × (15-25) cm, compare the existing battery inclusion generally used owing to having bigger overall dimensions, when requiring to prepare this battery inclusion, not only to weld and compare the weld seam that general battery inclusion is longer, and to have broader weld seam just can provide necessary bonding strength and sealing intensity.Additionally, battery inclusion is when welding, its inner sealing has battery module, existing melting type welding method such as electric resistance welding, arc-welding and laser weld etc., not only weld seam is narrow, generally only has 0.5-2mm, and the fragile structure that weld fusing recrystallization is formed, intensity difference, and produce high temperature even electric arc when welding and be easy to affect battery module therein, poor stability.And other to seal, conventionally by sealing ring, the sealing intensity not only needing bigger sealings structure but also can provide poor, it is impossible to the requirement of the battery inclusion of satisfied sealing large-sized battery pack.Thus, the present inventor proposes battery inclusion of the present invention with the bonding strength needed for satisfied sealing large-sized battery pack and sealing intensity.
Fig. 3 is the structural representation of battery inclusion provided by the invention.Battery inclusion includes pallet 1 and seals lid 2.
In the present invention, by the interatomic connection being implemented in combination with between described pallet and sealing lid on the interface of contact between described pallet and sealing lid, for non-melt welding manner, the impact not being heated, and the weld seam provided is wider, it is provided that the bonding strength of battery inclusion needs and sealing property.
According to the invention it is preferred in situation, described pallet includes the edge of opening and turns up the turn-up portion formed；The described edge sealing lid contacts as join domain with described turn-up portion；The width of described turn-up portion is 20-100mm.
According to the invention it is preferred in situation, the described lid that seals is in hat, and described sealing lid includes edge and turns up the brim part formed, and described brim part contacts as join domain with described turn-up portion；The width of described brim part is 20-100mm.
According to the present invention, described in be connected as non-melt welding manner, the impact that the part being attached for shell is not heated, do not produce intermetallic compound.Thus soldering reliability is high, and weld intensity is not less than pallet or seals the intensity of the material that lid uses own.Under preferable case, the interface connected between turn-up portion and the brim part of described sealing lid of described pallet is absent from transition zone.Described transition zone refers to the structure of the metal of cover plate and housing metal molten recrystallization of formation under the welding manner of fusing or the brazing layer of welded cover plate and housing formation.
According to the invention it is preferred in situation, the width of the part being attached between described turn-up portion and brim part is 1-20mm；Preferred described width is 10-20mm.
According to the invention it is preferred in situation, the bonding strength between described turn-up portion and brim part is 100-1000MPa；It is preferably 150-600MPa.
According to the invention it is preferred in situation, the sealing intensity of the part that described turn-up portion and brim part are attached is 0.015-0.2MPa；It is preferably 0.02-0.1MPa.
The preparation method that the present invention also provides for a kind of battery inclusion, the method includes: by sealing the top that lid is positioned over the opening of pallet, being placed as join domain interval at the edge of the edge sealing lid and the opening of pallet, gap is 0.5-3mm；Adopt electromagnetic pulse to be welded on described join domain to weld.
According to the invention it is preferred in situation, the method also includes: the edge of the opening of described pallet is carried out formation turn-up portion of turning up, the described edge sealing lid is carried out the formation brim part that turns up；Described brim part is parallel with described turn-up portion and has the slab construction in gap；Using described brim part and described turn-up portion as described join domain.Fig. 1 is the welded schematic diagram of one of battery inclusion provided by the invention.Sealing cover strip and have brim part 8, pallet, with turn-up portion 7, is placed every joint gap 4 between the two, and electromagnetic pulse is welded on join domain 5 and welds.
According to the invention it is preferred in situation, described brim part carries out being bent to inverted V-shaped structure, and the gap of V-shaped structure is 0.5-3mm.Fig. 2 is the another kind of Welding Structure schematic diagram of battery inclusion provided by the invention, and wherein, sealing cover strip has inverted v-shaped structure 6, obtains even curface after join domain 5 implements welding.
According to the invention it is preferred in situation, the welding energy of described electromagnetic pulse welding is 16-96KJ.
The present invention also provides for a kind of battery inclusion prepared by method provided by the invention.
The present invention also provides for a kind of battery bag, and this battery bag includes battery inclusion and the battery module being encapsulated in this battery inclusion, and wherein, described battery inclusion is battery inclusion provided by the invention.
The present invention also provides for a kind of electric automobile, and 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, bonding strength adopts the GP-TS2000M that company is surveyed in high product examine to record by pull force test method；Sealing intensity adopts the CPB air-tightness tester of BYD company to record by air tightness testing method.
Embodiment 1
By retreading forming turn-up portion outside the edge of pallet, sealing retreading forming brim part outside the edge covered, respective width is 15mm.
By the turn-up portion of pallet and the brim part parallel interval placement sealing lid, gap is 1.2mm, then carries out electromagnetic pulse welding (welding equipment model PS48-16/25 at join domain place, PST company), welding energy is 20KJ, as it is shown in figure 1, be the welding signal of battery inclusion.Wherein, the width of the part of connection is 12mm.
The battery inclusion obtained is attached intensity and sealing property test, and bonding strength is 185MPa, and sealing intensity is 0.05MPa.
The structure and morphology of the part connected is covered, as shown in Figure 4, it does not have alloy phase diagram with metallography microscope sem observation pallet and sealing.
Embodiment 2
By retreading forming turn-up portion outside the edge of pallet, sealing outside the edge of lid retreading forming brim part and be bent to form inverted V-shaped structure, respective width is 20mm.
By the turn-up portion of pallet and the brim part interval placement sealing lid, gap is 1.8mm, then carries out electromagnetic pulse welding at join domain place, and welding energy is 30KJ, as in figure 2 it is shown, be the welding signal of battery inclusion.Wherein, the width of the part of connection is 18mm.
The battery inclusion obtained is attached intensity and sealing property test, and bonding strength is 260MPa, and sealing intensity is 0.1MPa.
With metallography microscope sem observation pallet and the structure and morphology sealing the part that lid connects, similar to shown in Fig. 4, it does not have alloy phase diagram.
Embodiment 3
By retreading forming turn-up portion outside the edge of pallet, sealing retreading forming brim part outside the edge covered, respective width is 20mm.
By the turn-up portion of pallet and the brim part parallel interval placement sealing lid, gap is 1.5mm, then carries out electromagnetic pulse welding at join domain place, and welding energy is 25KJ, as it is shown in figure 1, be the welding signal of battery inclusion.Wherein, the width of the part of connection is 15mm.
The battery inclusion obtained is attached intensity and sealing property test, and bonding strength is 232MPa, and sealing intensity is 0.08MPa.
With metallography microscope sem observation pallet and the structure and morphology sealing the part that lid connects, shown in Fig. 4, it does not have alloy phase diagram.
Comparative example 1
By retreading forming turn-up portion outside the edge of pallet, sealing retreading forming brim part outside the edge covered, respective width is 15mm.
By the turn-up portion of pallet with seal the brim part surface of lid and fit parallel placement, then carry out laser weld (welding equipment model DISC8002, Tong Kuai company) at join domain place, bonding power is 4KW, speed of welding is 80mm/s, and weld width is 1.5mm, obtains battery inclusion.
The battery inclusion obtained is attached intensity and sealing property test, and bonding strength is 60MPa, and sealing intensity is 0.001MPa.
With metallography microscope sem observation pallet and the structure and morphology sealing the part that lid connects, as shown in Figure 5,6, there is alloy phase diagram.
Comparative example 2
To seal with sealing ring between pallet and sealing lid, sealed width is 100mm, obtains battery inclusion.
The battery inclusion obtained is attached intensity and sealing property test, and bonding strength is 60MPa, and sealing intensity is 0.001MPa.
By the result of above-described embodiment and comparative example it can be seen that battery inclusion provided by the invention can have better bonding strength and sealing property.And compare existing sealing ring and seal and can provide better bonding strength and sealing property with less sealed width, save the bulk of battery inclusion.
Claims (14)
1. a battery inclusion, this battery inclusion includes: the pallet of one end open and sealing lid；The mode combined by atom between edge and the edge of described sealing lid of the opening of described pallet is attached.
2. battery inclusion according to claim 1, wherein, described pallet includes the edge of opening and turns up the turn-up portion formed；The described edge sealing lid contacts as join domain with described turn-up portion；The width of described turn-up portion is 20-100mm.
3. battery inclusion according to claim 2, wherein, the described lid that seals is in hat, and described sealing lid includes edge and turns up the brim part formed, and described brim part contacts as join domain with described turn-up portion；The width of described brim part is 20-100mm.
4. battery inclusion according to claim 3, wherein, the interface connected between turn-up portion and the brim part of described sealing lid of described pallet is absent from transition zone.
5. battery inclusion according to claim 4, wherein, the width of the part being attached between described turn-up portion and brim part is 1-20mm；Preferred described width is 10-20mm.
6. battery inclusion according to claim 4, wherein, the bonding strength of the part being attached between described turn-up portion and brim part is 100-1000MPa；It is preferably 150-600MPa.
7. battery inclusion according to claim 4, wherein, the sealing intensity of the part being attached between described turn-up portion and brim part is 0.015-0.2MPa；It is preferably 0.02-0.1MPa.
8. a preparation method for battery inclusion, the method includes: by sealing the top that lid is positioned over the opening of pallet, being placed as join domain interval at the edge of the edge sealing lid and the opening of pallet, gap is 0.5-3mm；Adopt electromagnetic pulse to be welded on described join domain to weld.
9. method according to claim 8, wherein, the method also includes: the edge of the opening of described pallet is carried out formation turn-up portion of turning up, and the described edge sealing lid is carried out the formation brim part that turns up；Described brim part is parallel with described turn-up portion and has the slab construction in gap；Using described brim part and described turn-up portion as described join domain.
10. method according to claim 9, wherein, described brim part carries out being bent to inverted V-shaped structure, and the gap of V-shaped structure is 0.5-3mm.
11. method described in any one in-10 according to Claim 8, wherein, the welding energy of described electromagnetic pulse welding is 16-96KJ.
12. the battery inclusion that the method described in any one in claim 8-11 prepares.
13. a battery bag, this battery bag includes battery inclusion and the battery module being encapsulated in this battery inclusion, and wherein, described battery inclusion is the battery inclusion in claim 1-7 and 12 described in any one.
14. an electric automobile, this electric automobile includes multiple battery bag, and wherein, described battery bag is the battery bag described in claim 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410814903.3A CN105789501A (en) | 2014-12-23 | 2014-12-23 | Battery pack body and preparation method thereof, battery pack and electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410814903.3A CN105789501A (en) | 2014-12-23 | 2014-12-23 | Battery pack body and preparation method thereof, battery pack and electric vehicle |
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| CN105789501A true CN105789501A (en) | 2016-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410814903.3A Pending CN105789501A (en) | 2014-12-23 | 2014-12-23 | Battery pack body and preparation method thereof, battery pack and electric vehicle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20190035336A (en) * | 2017-09-26 | 2019-04-03 | 주식회사 엘지화학 | Battery module housing by applying Electromagnetic pulse technology and Method for manufacturing the same |
| CN112768817A (en) * | 2019-10-21 | 2021-05-07 | 比亚迪股份有限公司 | Battery seal assembly, battery module and car |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20190035336A (en) * | 2017-09-26 | 2019-04-03 | 주식회사 엘지화학 | Battery module housing by applying Electromagnetic pulse technology and Method for manufacturing the same |
| WO2019066266A1 (en) * | 2017-09-26 | 2019-04-04 | 주식회사 엘지화학 | Battery module housing to which electromagnetic pulse bonding technology is applied and method for manufacturing same |
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| US10964985B2 (en) | 2017-09-26 | 2021-03-30 | Lg Chem, Ltd. | Battery module housing to which electromagnetic pulse bonding technology is applied and method for manufacturing same |
| KR102248228B1 (en) * | 2017-09-26 | 2021-05-03 | 주식회사 엘지화학 | Battery module housing by applying Electromagnetic pulse technology and Method for manufacturing the same |
| CN112768817A (en) * | 2019-10-21 | 2021-05-07 | 比亚迪股份有限公司 | Battery seal assembly, battery module and car |
| CN112768817B (en) * | 2019-10-21 | 2021-12-07 | 比亚迪股份有限公司 | Battery module and automobile |
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Application publication date: 20160720 |