CN101150175B - An electric core shell and electric core - Google Patents
An electric core shell and electric core Download PDFInfo
- Publication number
- CN101150175B CN101150175B CN200610062653A CN200610062653A CN101150175B CN 101150175 B CN101150175 B CN 101150175B CN 200610062653 A CN200610062653 A CN 200610062653A CN 200610062653 A CN200610062653 A CN 200610062653A CN 101150175 B CN101150175 B CN 101150175B
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- electric core
- groove
- tube
- cylindrical shell
- lower cover
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- 239000011258 core-shell material Substances 0.000 title claims description 26
- 239000003792 electrolyte Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 13
- 229910052751 metal Inorganic materials 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 3
- 229910001416 lithium ion Inorganic materials 0.000 description 3
- 230000035515 penetration Effects 0.000 description 3
- 230000002950 deficient Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
Images
Classifications
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- Y02E60/122—
Abstract
This invention discloses a shell of electric core and a core using it, in which, the shell includes a drum, a top cover plate and a bottom cover plate, and the drum is a drum with a bottom with a through hole and an paerture at the top, a groove along the circle is set on the bottom plate and a groove along the circle is set on the drum of the shell, since the heat conductivity of air is much lower than that of metal, it can stop losing of heat at the welding place when welding by laser effectively by grooves along the circle directin on the drum bottom and on the bottom plate so as to deepen the depth fusion under definite laser strength.
Description
Technical field
The present invention relates to electric core assembly, be specifically related to the housing and the electric core of electric core.
Background technology
Lithium-ion electric core is a kind of big capacity, high-power electric core, and it is mainly used on the mini-plant, particularly mobile phone, laptop computer, portable power tool.Lithium-ion electric core generally is made up of electric core shell body and the electrical core coiling body and the electrolyte that are contained in housing, electrical core coiling body by positive and negative plate and membrane coil around forming.Cover plate was formed about existing aluminium matter column lithium ion electric core housing was generally reached by a cylindrical tube, electrical core coiling body is put into cylindrical shell, the positive and negative lug of electrical core coiling body is linked to each other with corresponding positive and negative terminal, the mode that adopts laser welding more up and down cover plate is welded on the two ends up and down of cylindrical shell, makes it to become a confined space.Adopt the housing of this structure owing to lack necessary location structure, its position is difficult to control behind the cylindrical shell so electrical core coiling body is packed into, electrical core coiling body slides in cylindrical shell easily, and the assembling difficulty is returned follow-up welded cover plate and caused certain difficulty.At this problem, our company improves this, and the cylindrical shell at the original penetrating no end is improved to the cylindrical shell that an end has the end, and a tube end is provided with through hole (seeing CN200610061874.3 for details).In the process of practice, find, adopt this shell structure electric core since when welding heat scatter and disappear easily, welding penetration is more shallow, makes the fraction defective of laser welding higher, causes electric core leakage easily.
Visitor in the invention
At the deficiency of above technology, the invention provides a kind of electric core shell body, the fraction defective of this electric core shell volumetric laser welding is lower, uses the electric core leakage rate of this electric core shell body low.
The present invention also provides a kind of electric core that uses this electric core shell body.
Above technical purpose is achieved through the following technical solutions:
A kind of electric core shell body, it comprises a cylindrical shell and upper and lower cover plate, what described cylindrical shell was upper end open has the end cylinder-shaped, and a tube end be provided with through hole, it is characterized in that: the lower cover of described electric core shell body is provided with along the circumferential direction a groove.
Above-mentioned along the circumferential direction the groove that also is provided with at the bottom of the tube.
The periphery of above-mentioned tube end through hole is provided with positioning step or slope, location.
The distance of above-mentioned tube end upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
The distance of above-mentioned lower cover upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
The width of above-mentioned groove is 1-3 a times of cylindrical shell wall thickness.
The degree of depth of above-mentioned tube end upper groove is the 1/4-1/2 of tube bottom wall thickness.
A kind of electric core, electrical core coiling body and electrolyte that it comprises housing and is contained in housing, electrical core coiling body by positive and negative plate and membrane coil around forming, housing is made up of cylindrical shell and upper and lower cover plate, what described cylindrical shell was upper end open has the end cylinder-shaped, and tube is provided with through hole in an end, it is characterized in that: the lower cover of described electric core shell body is provided with along the circumferential direction a groove.
Above-mentioned along the circumferential direction the groove that also is provided with at the bottom of the tube.
The periphery of above-mentioned tube end through hole is provided with positioning step or slope, location.
The distance of above-mentioned tube end upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
The distance of above-mentioned lower cover upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
The width of above-mentioned groove is 1-3 a times of cylindrical shell wall thickness.
The degree of depth of above-mentioned tube end upper groove is the 1/4-1/2 of tube bottom wall thickness.
Adopt the beneficial technical effects that technique scheme produced to be: because the pyroconductivity of the thermal conductivity ratio metal of air is much lower, so by on the lower cover and tube one along the circumferential direction groove was set on the end, can effectively stop scattering and disappearing of when carrying out laser welding weld heat, promptly to decide under the laser intensity welding penetration darker thereby make, the failure welding rate of housing is reduced greatly, and then the leakage rate of electric core is reduced.
Description of drawings
Fig. 1 is for the invention provides electric core shell body schematic diagram;
Fig. 2 is an A enlarged drawing among Fig. 1;
Fig. 3 is that invention provides electric core schematic diagram;
Fig. 4 is a B enlarged drawing among Fig. 3.
Embodiment
The invention provides a kind of electric core shell body and use the electric core of this housing, housing comprises a cylindrical shell and upper and lower cover plate, what described cylindrical shell was upper end open has the end cylinder-shaped, and the tube end, be provided with through hole, the lower cover of electric core shell body is provided with along the circumferential direction a groove, is provided with along the circumferential direction a groove further at the bottom of the tube.Further, the periphery of above-mentioned through hole is provided with positioning step or slope, location.The distance of above-mentioned tube end upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness, the distance of above-mentioned lower cover upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness, the effect that machined grooves mainly is based on the processing complexity and stops heat to run off in above-mentioned this scope is considered, distance too little (＜1 times), processing is difficulty; Distance is big (＞3 times) too, are unfavorable for stoping the loss of heat.The width of above-mentioned groove is 1-3 a times of cylindrical shell wall thickness, the degree of depth of above-mentioned tube end upper groove is the 1/4-1/2 of tube bottom wall thickness, the size of groove is limited to this scope, mainly being based on the effect of prevention heat loss and the intensity of the tube end and lower cover considers, recess width is excessive or the degree of depth is dark excessively, can reduce the intensity of the tube end and lower cover greatly, cause the housing easy deformation; Groove is narrow or shallow excessively, is unfavorable for preventing that heat runs off.With specific embodiment realization of the present invention is described below.
A kind of electric core shell body, as shown in Figure 1, it includes a cylindrical shell 1 and upper cover plate 2 and lower cover 3, what cylindrical shell was upper end open has the end cylinder-shaped, and a tube end be provided with through hole, lower cover is provided with along the circumferential direction a groove 30.The periphery of through hole is provided with positioning step or slope 11, location.The enlarged drawing Fig. 2 at A place can clearer understanding present embodiment in by Fig. 1.The wall thickness of this kind electric core shell body is 0.3mm, and tube base thickness degree is 0.8mm, and the distance of this embodiment further groove and through hole circumference is 0.3mm, and recess width is 0.9mm, and the degree of depth is 0.2mm.
This embodiment and embodiment 1 structure are basic identical, and different is, tube also is provided with groove at the end, and the distance of this embodiment further groove and through hole circumference is 0.9mm, and recess width is 0.3mm, and the degree of depth is 0.4mm.
This embodiment and embodiment 1 structure are basic identical, and different is, also go up and also is provided with along the circumferential direction a groove at the tube end, as shown in Figure 3.Can clearer understanding the present invention by the enlarged drawing Fig. 4 of B place among Fig. 3.The distance of tube end groove and through hole circumference is 0.6mm in this embodiment, and recess width is 0.6mm, and the degree of depth is 0.6mm; The distance of lower cover groove and through hole circumference is 0.6mm, and recess width is 0.6mm, and the degree of depth is 0.35mm;
Embodiment 4
A kind of electric core, electrical core coiling body and electrolyte that it comprises housing and is contained in housing, electrical core coiling body by positive and negative plate and membrane coil around forming, housing is by cylindrical shell and upper cover plate and lower cover, what cylindrical shell was upper end open has the end cylinder-shaped, and a tube end be provided with through hole, be provided with along the circumferential direction a groove at the bottom of the tube, the periphery of through hole is provided with positioning step or slope, location, also is provided with along the circumferential direction a groove on the lower cover of electric core shell body.The wall thickness of this kind electric core shell body is 0.3mm, and tube base thickness degree is 0.8mm, and the thickness of lower cover is 0.7mm, and the distance of tube end groove and through hole circumference is 0.3mm among this embodiment, and recess width is 0.9mm, and the degree of depth is 0.2mm; The distance of lower cover groove and through hole circumference is 0.3mm, and recess width is 0.9mm, and the degree of depth is 0.175mm;
Embodiment 5
This embodiment is substantially the same manner as Example 4, and different is, the distance of tube end groove and through hole circumference is 0.9mm among this embodiment, and recess width is 0.3mm, and the degree of depth is 0.4mm; The distance of lower cover groove and through hole circumference is 0.9mm, and recess width is 0.3mm, and the degree of depth is 0.24mm;
Embodiment 6
This embodiment is substantially the same manner as Example 4, and different is, the distance of tube end groove and through hole circumference is 0.6mm among this embodiment, and recess width is 0.6mm, and the degree of depth is 0.6mm; The distance of lower cover groove and through hole circumference is 0.4mm, and recess width is 0.5mm, and the degree of depth is 0.3mm;
Comparative Examples
Produce 40000 electric cores according to identical production technology, wherein adopt in the CN200610061874.3 patent shell structure of not establishing groove at the bottom of the tube to make 10000 electric cores, adopt each 10000 in the electric core of structure among embodiment 1, embodiment 4, the embodiment 5.After depositing January, above-mentioned electric core is detected, testing result is as follows:
Table 1. different housings structure electricity core leakage rate
| Structure type | The tube end, do not have | Embodiment | 1 | |
|
| The leakage rate | 15％ | 0.4％ | 0.8％ | 0.45％ |
By last table, we are not difficult to find, at the bottom of electric core shell body tube a groove are set, can effectively stop scattering and disappearing of when carrying out laser welding weld heat, promptly to decide under the laser intensity welding penetration darker thereby make, and the failure welding rate of housing reduced greatly, and then the leakage rate of electric core is reduced.One groove particularly also is set on lower cover, and effect is more obvious.
Claims (9)
1. electric core shell body, it comprises a cylindrical shell and upper and lower cover plate, what described cylindrical shell was upper end open has the end cylinder-shaped, and a tube end be provided with through hole, it is characterized in that: the lower cover of described electric core shell body is provided with along the circumferential direction a groove.
2. electric core shell body according to claim 1 is characterized in that: described along the circumferential direction the groove that also is provided with at the bottom of the tube.
3. electric core shell body according to claim 1 and 2 is characterized in that: the periphery of described tube end through hole is provided with positioning step or slope, location.
4. electric core shell body according to claim 2 is characterized in that: the distance of described tube end upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
5. electric core shell body according to claim 1 and 2 is characterized in that: the distance of described lower cover upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
6. electric core, electrical core coiling body and electrolyte that it comprises housing and is contained in housing, electrical core coiling body by positive and negative plate and membrane coil around forming, housing is made up of cylindrical shell and upper and lower cover plate, what described cylindrical shell was upper end open has the end cylinder-shaped, and tube is provided with through hole in an end, it is characterized in that: the lower cover of described electric core shell body is provided with along the circumferential direction a groove.
7. electric core according to claim 6 is characterized in that: described along the circumferential direction the groove that also is provided with at the bottom of the tube.
8. according to claim 6 or 7 described electric cores, it is characterized in that: the periphery of through hole is provided with positioning step or slope, location at the bottom of the described electric core shell body tube.
9. electric core according to claim 6 is characterized in that: the distance of described lower cover upper groove and through hole circumference is 1-3 a times of cylindrical shell wall thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610062653A CN101150175B (en) | 2006-09-19 | 2006-09-19 | An electric core shell and electric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610062653A CN101150175B (en) | 2006-09-19 | 2006-09-19 | An electric core shell and electric core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101150175A CN101150175A (en) | 2008-03-26 |
| CN101150175B true CN101150175B (en) | 2010-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610062653A Active CN101150175B (en) | 2006-09-19 | 2006-09-19 | An electric core shell and electric core |
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| Country | Link |
|---|---|
| CN (1) | CN101150175B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101150177B (en) * | 2006-09-19 | 2010-05-12 | 深圳市比克电池有限公司 | An electric core shell and electric core |
| JP5742792B2 (en) * | 2012-06-27 | 2015-07-01 | トヨタ自動車株式会社 | battery |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236490A (en) * | 1997-09-03 | 1999-11-24 | 松下电器产业株式会社 | Dry cell and method of manufacturing outer can therefor |
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2006
- 2006-09-19 CN CN200610062653A patent/CN101150175B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1236490A (en) * | 1997-09-03 | 1999-11-24 | 松下电器产业株式会社 | Dry cell and method of manufacturing outer can therefor |
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| Publication number | Publication date |
|---|---|
| CN101150175A (en) | 2008-03-26 |
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Effective date of registration: 20160921 Address after: An Zhen Zhongmu County 451470 Henan city of Zhengzhou Province Liu Zheng Qiao Village Patentee after: ZHENGZHOU BAK BATTERY Co.,Ltd. Address before: Kwai Chung street Beek Industrial Park in Longgang District of Shenzhen City, Guangdong province 518119 Patentee before: SHENZHEN BAK BATTERY Co.,Ltd. |
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Effective date of registration: 20191022 Granted publication date: 20100512 |
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