CN203910900U - Power battery pack - Google Patents
Power battery pack Download PDFInfo
- Publication number
- CN203910900U CN203910900U CN201420302974.0U CN201420302974U CN203910900U CN 203910900 U CN203910900 U CN 203910900U CN 201420302974 U CN201420302974 U CN 201420302974U CN 203910900 U CN203910900 U CN 203910900U
- Authority
- CN
- China
- Prior art keywords
- power battery
- copper
- aluminium
- battery pack
- electrokinetic cell
- 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 - Lifetime
Links
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 70
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 70
- 238000003466 welding Methods 0.000 claims abstract description 24
- 239000004411 aluminium Substances 0.000 claims description 61
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 19
- 229910052802 copper Inorganic materials 0.000 abstract description 19
- 239000010949 copper Substances 0.000 abstract description 19
- 239000000463 material Substances 0.000 description 10
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model provides a power battery pack. The power battery pack comprises a plurality of adjacent power batteries which are fixedly and electrically connected with one another in sequence and in series, and each power battery comprises an aluminum positive pole and a copper negative pole. The power battery pack further comprises aluminum connecting sheets and bolts, wherein one end part of each aluminum connecting sheet is provided with a screwed hole and is connected with the copper pole of one power battery through laser welding, and the other end part of each aluminum connecting sheet and the aluminum pole of the corresponding adjacent power battery are connected together through laser welding, and a screwed hole is formed in the copper pole of each power battery; each bolt is in threaded connection with the screwed hole in the copper pole of one power battery and the screwed hole in one end part of the aluminum connecting sheet of the power battery, so that the end part of the aluminum connecting plate of the power battery is fastened on the copper pole. By directly welding the aluminum connecting sheets with the aluminum poles and the copper poles, the area is greatly increased and the conductivity is improved; meanwhile, the structure is simplified, and the structural reliability at joints is improved.
Description
Technical field
The utility model relates to energy storage device field, relates in particular to a kind of power battery pack.
Background technology
Nowadays air pollution is more and more serious, and motor vehicle exhaust emission is important pollutant sources.Therefore reduce, even stopping motor vehicle exhaust emission, be the main direction of follow-up car industry development, and electric automobile is one of them heat subject.The core of electric automobile is electrokinetic cell.Electrokinetic cell is modularization assembling in a distinguishing feature of the application in electric automobile field, by a lot of battery pack, dresses up battery pack, more a plurality of battery pack serial or parallel connections are assembled into power brick.In battery pack, the circuit connection between battery is to realize by being connected of electric connecting sheet and battery electrode column.Yet need be on active service under various complex environments because of automobile, battery pack needs to possess very strong reliability in the use procedure of electric automobile, this just proposes very high requirement to battery electrode column and being connected of brace.
Referring to figs. 1 through Fig. 3, very typical a kind of scheme is to adopt J type switching piece 4 to be welded on the pole of electrokinetic cell 1 at present, and then I type brace 5 is stuck in the kink of J type switching piece 4, and both are welded together, then stamps set bolt 3.The main cause that adopts this scheme is that the negative terminal of electrokinetic cell 1 is the copper-base post 12 of copper material, positive terminal is the aluminium pole 11 of aluminium material, in series circuit, copper-base post 12 must link together by brace with aluminium pole 11, in order to ensure electric conductivity and economy, I type brace 5 is all to adopt copper material or aluminium, but after the welding of copper aluminium heterogeneous material, structural strength is too poor, so I type brace 5 is no matter select copper material or aluminium, always keep away unavoidable copper aluminium and must weld the still inadequate difficult problem of weld strength, in order to address this problem, existing technology is introduced third party can with copper or aluminium the J type switching piece 4 of certain weld strength, realize welding.Embodiment is: first J type switching piece 4 and aluminium pole 11, copper-base post 12 welded together, then I type brace 5 is stuck in the bending part of J type switching piece 4, allow bending part by I type brace 5 clampings, then by both welding.For guaranteeing the mechanical connection intensity of aluminium pole 11, copper-base post 12, J type switching piece 4, I type brace 5, finally use bolt 3 that three is locked.Realize thus fixing and conduction.But the problem that this scheme exists is:
1. complex structure, realizes conducting between I type brace 5 and aluminium pole 11, copper-base post 12 with 4 transition of J type switching piece, by clamping, welding, locking, and complex structure, reliability will variation.The link position of J type switching piece 4 and I type brace 5, in use easy vibrated impact is loosening, thereby has increased welding resistance;
2. manufacturing process is complicated, and the J type groove requirement on machining accuracy of J type switching piece 4 is higher, need to fit tightly with I type brace 5.In assembling process, need welding, card I type brace 5, operating procedure is many, bad control;
The general employing of 3.J type switching piece 4 preferably nickel material or zinc material relative to copper or aluminium weld strength, price comparison is expensive, and cost increases.
Utility model content
In view of the problem existing in background technology, the purpose of this utility model is to provide a kind of power battery pack, and it can improve the conductivity of power battery pack.
Another object of the present utility model is to provide a kind of power battery pack, and it can improve the structural reliability of power battery pack.
To achieve these goals, the utility model provides a kind of power battery pack, it comprises a plurality of adjacent electrokinetic cells that are fixedly connected sequentially together and are electrically connected, described electrical connection comprises and being electrically connected in series, and each electrokinetic cell comprises that electric polarity is that positive aluminium pole and electric polarity is negative copper-base post.Wherein, described power battery pack also comprises: aluminium brace, one end offer screwed hole and with the copper-base post laser welding of an electrokinetic cell together and together with the aluminium pole laser welding of the other end and corresponding adjacent electrokinetic cell, wherein on the copper-base post of this electrokinetic cell, offer screwed hole; And bolt, be spirally connected with the screwed hole of this end of the aluminium brace of the screwed hole of offering on the copper-base post of this electrokinetic cell and this electrokinetic cell, so that this end of the aluminium brace of this electrokinetic cell is anchored on to copper-base post.
The beneficial effects of the utility model are as follows:
Aluminium brace and aluminium pole, copper-base post have increased contact area after directly welding greatly, improve conductivity; The structure of having simplified aluminium brace and aluminium pole, copper-base post, further improves the structural reliability of junction; The aluminium that aluminium brace adopts at a low price and electric conductivity meets the demands equally, cost reduces greatly.
Accompanying drawing explanation
Fig. 1 is the vertical view of existing power battery pack;
Fig. 2 is the front view of an electrokinetic cell of existing power battery pack;
Fig. 3 is the enlarged drawing of the circle part of Fig. 2;
Fig. 4 is the vertical view according to power battery pack of the present utility model;
Fig. 5 is according to the front view of power battery pack of the present utility model electrokinetic cell;
Fig. 6 is the enlarged drawing of the circle part of Fig. 5.
Wherein, description of reference numerals is as follows:
1 electrokinetic cell 21 screwed holes
11 aluminium pole 22 basal surfaces
12 copper-base post 3 bolts
121 screwed hole 4J type switching pieces
122 top surface 5I type braces
2 aluminium braces
Embodiment
Describe in detail with reference to the accompanying drawings according to power battery pack of the present utility model.
With reference to Fig. 4 to Fig. 6, according to power battery pack of the present utility model, comprise a plurality of adjacent electrokinetic cells 1 that are fixedly connected sequentially together and are electrically connected, described electrical connection comprises and being electrically connected in series, and each electrokinetic cell 1 comprises that electric polarity is that positive aluminium pole 11 and electric polarity is negative copper-base post 12.Wherein, described power battery pack also comprises: aluminium brace 2, one end offer screwed hole 21 and with copper-base post 12 laser welding of an electrokinetic cell 1 together and together with aluminium pole 11 laser welding of the other end and corresponding adjacent electrokinetic cell 1, wherein on the copper-base post 12 of this electrokinetic cell 1, offer screwed hole 121; And bolt 3, be spirally connected with the screwed hole 21 of this end of the aluminium brace 2 of the screwed hole 121 of offering on the copper-base post 12 of this electrokinetic cell 1 and this electrokinetic cell 1, so that this end of the aluminium brace 2 of this electrokinetic cell 1 is anchored on to copper-base post 12.At this, it should be added that, whether described electrical connection also comprises in parallel electrical connection, can determine depending on actual service condition, and in other words, actual conditions can be independent being connected in series or being connected in series and the combination being connected in parallel.
The characteristic that is difficult to welding due to aluminium and copper heterogeneous material, aluminium brace 2 can be very poor with the weld strength of copper-base post 12, therefore aluminium brace 2 is by aluminium, copper fusing with the object of copper-base post 12 welding, copper aluminium is embedded mutually, increase the contact area of aluminium and copper, thereby increase overcurrent capability, guarantees the reliability of overcurrent.For guaranteeing the connection reliability of aluminium brace 2 and copper-base post 12, after aluminium brace 2 and copper-base post 12 weld, use bolt 3 lockings, thereby guarantee the reliability of mechanical strength, further improve the reliability that power battery pack is electrically connected in Vehicle Driving Cycle process.Than prior art (referring to figs. 1 through Fig. 3), the utility model makes up the opposing party's defect cleverly by a side advantage, realize well combination: by bolt 3 lockings, make up the intensity defect of copper aluminium welding, by copper and aluminium welding, fetch and make up bolt-locking because of the little defect of the little overcurrent capability causing of the actual occlusal contact area of thread.Simultaneously, because aluminium brace 2 and aluminium pole 11 are materials of the same race, there is very high soldering reliability, therefore can directly weld, do not need bolt 3 to lock again.
In the utility model, because the aluminium brace 2 that material is identical can be realized good welding with aluminium pole 11, thus can save the clamping screw on aluminium pole 11, and aluminium is easily processed, cost is low.
The utility model has the following advantages with respect to prior art: aluminium brace 2 directly welds with aluminium pole 11, copper-base post 12, saves J type switching piece 4, has greatly increased contact area, improves conductivity; Simplify the structure of aluminium brace 2 with aluminium pole 11, copper-base post 12, further improved the structural reliability of junction; The aluminium that aluminium brace 2 adopts at a low price and electric conductivity meets the demands equally, cost reduces greatly.
According in an embodiment of power battery pack of the present utility model, with reference to Fig. 6, the position of this end of aluminium brace 2 together with copper-base post 12 laser welding of this electrokinetic cell 1 is (in Fig. 6, for the sake of clarity, with black fill color, show the part that the two welding fuses together) be the part of the top surface 122 around screwed hole 21 of the part of the basal surface 22 around screwed hole 21 of aluminium brace 2 and the copper-base post 12 of this electrokinetic cell 1.
According in power battery pack of the present utility model, the electrokinetic cell 1 of power battery pack can be lithium-ion-power cell, is certainly not limited to this, and it can be for being applicable to the electrokinetic cell of other types of the present utility model.
Claims (3)
1. a power battery pack, comprise a plurality of adjacent electrokinetic cells (1) that are fixedly connected sequentially together and are electrically connected, described electrical connection comprises and being electrically connected in series, each electrokinetic cell (1) comprises that electric polarity is that positive aluminium pole (11) and electric polarity is negative copper-base post (12), it is characterized in that, described power battery pack also comprises:
Aluminium brace (2), one end offer screwed hole (21) and with copper-base post (12) laser welding of an electrokinetic cell (1) together and together with aluminium pole (11) laser welding of the other end and corresponding adjacent electrokinetic cell (1), wherein on the copper-base post (12) of this electrokinetic cell (1), offer screwed hole (121); And
Bolt (3), be spirally connected with the screwed hole (21) of this end of the aluminium brace (2) of the screwed hole (121) of offering on the copper-base post (12) of this electrokinetic cell (1) and this electrokinetic cell (1), so that this end of the aluminium brace (2) of this electrokinetic cell (1) is anchored on to copper-base post (12).
2. power battery pack according to claim 1, it is characterized in that, the position together with copper-base post (12) laser welding of electrokinetic cell of this end and this (1) of aluminium brace (2) is the part of the part of the basal surface around screwed hole (21) (22) of aluminium brace (2) and the top surface around screwed hole (121) (122) of the copper-base post (12) of this electrokinetic cell (1).
3. power battery pack according to claim 1, is characterized in that, the electrokinetic cell of power battery pack (1) is lithium-ion-power cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420302974.0U CN203910900U (en) | 2014-06-09 | 2014-06-09 | Power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420302974.0U CN203910900U (en) | 2014-06-09 | 2014-06-09 | Power battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203910900U true CN203910900U (en) | 2014-10-29 |
Family
ID=51785150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420302974.0U Expired - Lifetime CN203910900U (en) | 2014-06-09 | 2014-06-09 | Power battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203910900U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054332A (en) * | 2017-11-23 | 2018-05-18 | 江西安驰新能源科技有限公司 | A kind of duralumin pole piece and battery modules |
-
2014
- 2014-06-09 CN CN201420302974.0U patent/CN203910900U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108054332A (en) * | 2017-11-23 | 2018-05-18 | 江西安驰新能源科技有限公司 | A kind of duralumin pole piece and battery modules |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 Patentee after: Contemporary Amperex Technology Co.,Ltd. Address before: 352100 Jiaocheng District of Ningde City, Fujian Province Zhang Wan Zhen Xingang Road No. 1 West Building 1F- research Patentee before: CONTEMPORARY AMPEREX TECHNOLOGY Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |