CN105914336A - Connection structure of power battery cell assembly - Google Patents
Connection structure of power battery cell assembly Download PDFInfo
- Publication number
- CN105914336A CN105914336A CN201610464054.2A CN201610464054A CN105914336A CN 105914336 A CN105914336 A CN 105914336A CN 201610464054 A CN201610464054 A CN 201610464054A CN 105914336 A CN105914336 A CN 105914336A
- Authority
- CN
- China
- Prior art keywords
- copper sheet
- connection
- power battery
- pole piece
- connection copper
- 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.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
-
- 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 relates to a connection structure of a power battery cell assembly. The connection structure comprises a connection copper sheet, a battery cell and a plurality of pole plates, wherein the plurality of pole plates are fixedly arranged on the battery cell, a groove is formed in each pole plate, the width of the groove is adaptive to the width of the connection copper sheet, the depth of the groove is the same as the thickness of the connection copper sheet, and the pole plates are connected with one another through the connection copper sheet embedded in the grooves. In the connection structure, the grooves in the pole plates are fixed with the connection copper sheet, thus, the surface of one side of an electrode of a battery module is smooth and can bear a load, and the problem of module loosen caused by unsmooth electrode side is prevented; all connection sheets are embedded in the grooves in the pole plates and then are welded, and the connection copper sheets cannot derivate from the original positions to cause a short-connection risk even a welding line is failure; and meanwhile, the thickness of the connection copper sheets is increased, the area is reduced, the total material consumption is basically unchanged, while the whole connection copper sheets participate in conduction, the internal resistance is reduced, and the tear resistant capability also can be improved.
Description
Technical field
The present invention relates to power battery pack battery core mounting technology field, be specifically related to the attachment structure of a kind of electrical core of power battery assembly.
Background technology
New energy sources for automobile technology quickly grows at present, and particularly lithium-ion-power cell is the electric automobile field of energy-accumulating medium, and the group technology of electrokinetic cell becomes a big technical bottleneck at present, and wherein the erection welding problem connecting copper sheet of battery core is cashed prominent.
Power battery pack is typically made up of battery core connection in series-parallel, realizes connection in series-parallel by copper sheet between battery core.Copper sheet is directly welded on battery core electrode, and battery core electrode has a pair rivet, and copper sheet exists with rivet and interferes, and typically takes the mode of stamping-out pit on copper sheet to evade.Which results in the integral surface out-of-flatness of battery modules electrode side, be difficult to this surface is carried out operative constraint when designing modular cartridge.
Secondly connect and between copper sheet and battery core electrode, use one-sided resistance weldering, in order to guarantee firm welding, need manual grinding battery core electrode surface to smear solder(ing) paste before welding, and use thin and wide connection copper sheet, copper sheet material utilizes insufficient, and solder joint, junction easily tear.During welding can only manual welding, production automation degree is low, and the little internal resistance of solder joint area is big, and processing quality is unstable, work under bad environment.
Summary of the invention
It is an object of the invention to provide the attachment structure of a kind of electrical core of power battery assembly, make electrode side integral surface more smooth, reduce the internal resistance of copper sheet, improve technique and the lear energy of junction of battery component.
For achieving the above object, present invention employs techniques below scheme:
A kind of attachment structure of electrical core of power battery assembly, including connecting copper sheet, battery core and multiple pole piece being fixed in battery core, the described pole piece groove that to be provided with width suitable with being connected copper sheet width, the degree of depth of this groove is identical with the thickness size connecting copper sheet, and described pole piece is connected with each other by embedding the connection copper sheet in groove.
Described pole piece in battery core in matrix arrangement.
Described pole piece is connected by rivet and battery core are fixing.
Described battery core is provided with position limiting structure.
Described position limiting structure is made up of two projections being oppositely arranged, and the distance between this projection matches with the width size being connected copper sheet.
Described connection copper sheet fixes by welding with pole piece.
The mode of described welding is laser welding or ultrasonic bonding.
As shown from the above technical solution, the attachment structure of electrical core of power battery assembly of the present invention, is fixed with being connected copper sheet by the groove being arranged on pole piece, makes the side surfacing of battery modules electrode and can bear load, avoid the out-of-flatness of electrode side, and the problem that the module that causes is loose.All connection copper sheets be all embed the groove on pole piece after weld again, even if welding seam failure, connect copper sheet and also cause short circuit dangerous without departing from origin-location.Meanwhile, connecting copper thickness increase area reduction material consumption total amount and be basically unchanged, but connect copper sheet entirety and be involved in conduction, internal resistance reduces on the contrary, and lear energy is also improved.Additionally, connecting the laser welding that weld employing automatization between copper sheet and battery core electrode or ultrasonic bonding, and need not time-consuming manual grinding, smear the pretreatment such as solder(ing) paste, weldquality is good, production efficiency and automatization level are high, and work situation the most greatly improves.The weld seam connecting copper sheet and pole piece is butt weld, and section of weld joint is long-pending to be compared spot welding and exceed several times, and weld seam internal resistance small intensity is big.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the partial schematic diagram of A-A in Fig. 1.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings:
As shown in Figure 1, the attachment structure of the electrical core of power battery assembly of the present embodiment, including connecting copper sheet 1, battery core 2 and multiple pole piece 3 being fixed in battery core 2, pole piece 3 groove 31 that to be provided with width suitable with 1 width that is connected copper sheet, the degree of depth of this groove 31 is identical with the thickness size connecting copper sheet 1, and pole piece 3 is connected with each other by embedding the connection copper sheet 1 in groove 31.
Connect being connected with each other of copper sheet 1 and pole piece 3 for convenience, then this pole piece 3 in battery core 2 in matrix arrangement.As in figure 2 it is shown, pole piece 3 is connected by rivet 4 is fixing with battery core 2.
Battery core 2 is provided with position limiting structure 21, this position limiting structure 21 is made up of two projections being oppositely arranged, distance between this projection matches with the width size being connected copper sheet 1, in this position limiting structure 21 is able to ensure that the electrode water flat grooves 31 that the connection copper sheet 1 of correspondence can accurately embed all connected battery cores.
Power pole piece 3 processes the horizontal groove 31 of one fixed width and the degree of depth when producing, and the direction of this groove 31 is the vertical long limit of battery core 2.Battery core string mode in the different set of cells of foundation, processing is corresponding connects copper sheet 1, copper sheet 1 thickness is consistent with the pole piece 3 level trough degree of depth, copper sheet 1 embedded part is consistent with level trough width, after all connection copper sheets 1 of one battery modules embed pole piece 3 level trough, by in clamping for the module automatic laser welding machine putting into CNC control or supersonic welder, being finally completed the welding job connecting copper sheet 1 with pole piece 3, the mode length of this welding uses laser welding or ultrasonic bonding.
Embodiment described above is only to be described the preferred embodiment of the present invention; not the scope of the present invention is defined; on the premise of designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (7)
1. the attachment structure of an electrical core of power battery assembly, it is characterized in that: include connecting copper sheet (1), battery core (2) and multiple pole piece (3) being fixed in battery core (2), described pole piece (3) groove (31) that to be provided with width suitable with (1) width that is connected copper sheet, the degree of depth of this groove (31) is identical with the thickness size connecting copper sheet (1), and described pole piece (3) is connected with each other by embedding the connection copper sheet (1) in groove (31).
The attachment structure of electrical core of power battery assembly the most according to claim 1, it is characterised in that: described pole piece (3) in battery core (2) in matrix arrangement.
The attachment structure of electrical core of power battery assembly the most according to claim 1, it is characterised in that: described pole piece (3) is connected by rivet (4) and battery core (2) are fixing.
The attachment structure of electrical core of power battery assembly the most according to claim 1, it is characterised in that: described battery core (2) is provided with position limiting structure (21).
The attachment structure of electrical core of power battery assembly the most according to claim 1, it is characterised in that: described position limiting structure (21) is made up of two projections being oppositely arranged, and the distance between this projection matches with the width size being connected copper sheet (1).
The attachment structure of electrical core of power battery assembly the most according to claim 1, it is characterised in that: described connection copper sheet (1) fixes by welding with pole piece (3).
The attachment structure of electrical core of power battery assembly the most according to claim 6, it is characterised in that: the mode of described welding is laser welding or ultrasonic bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610464054.2A CN105914336A (en) | 2016-06-24 | 2016-06-24 | Connection structure of power battery cell assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610464054.2A CN105914336A (en) | 2016-06-24 | 2016-06-24 | Connection structure of power battery cell assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105914336A true CN105914336A (en) | 2016-08-31 |
Family
ID=56758595
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610464054.2A Pending CN105914336A (en) | 2016-06-24 | 2016-06-24 | Connection structure of power battery cell assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105914336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113560724A (en) * | 2021-08-16 | 2021-10-29 | 深圳市博敏电子有限公司 | Laser welding method for power battery copper sheet |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110798A (en) * | 2009-12-28 | 2011-06-29 | Sb锂摩托有限公司 | Battery module |
| CN104466220A (en) * | 2013-09-13 | 2015-03-25 | 三星Sdi株式会社 | Secondary battery module |
| CN105514336A (en) * | 2016-01-20 | 2016-04-20 | 华霆（合肥）动力技术有限公司 | Battery pack connection structure |
| KR20160051443A (en) * | 2014-11-03 | 2016-05-11 | 주식회사 엘지화학 | Battery module with insert injection mold structure of cell |
| CN205985165U (en) * | 2016-06-24 | 2017-02-22 | 合肥国轩高科动力能源有限公司 | Connection structure of power battery electricity core subassembly |
-
2016
- 2016-06-24 CN CN201610464054.2A patent/CN105914336A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102110798A (en) * | 2009-12-28 | 2011-06-29 | Sb锂摩托有限公司 | Battery module |
| CN104466220A (en) * | 2013-09-13 | 2015-03-25 | 三星Sdi株式会社 | Secondary battery module |
| KR20160051443A (en) * | 2014-11-03 | 2016-05-11 | 주식회사 엘지화학 | Battery module with insert injection mold structure of cell |
| CN105514336A (en) * | 2016-01-20 | 2016-04-20 | 华霆（合肥）动力技术有限公司 | Battery pack connection structure |
| CN205985165U (en) * | 2016-06-24 | 2017-02-22 | 合肥国轩高科动力能源有限公司 | Connection structure of power battery electricity core subassembly |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113560724A (en) * | 2021-08-16 | 2021-10-29 | 深圳市博敏电子有限公司 | Laser welding method for power battery copper sheet |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160831 |
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| RJ01 | Rejection of invention patent application after publication |