CN202905821U - Assembly structure of lithium ion battery - Google Patents
Assembly structure of lithium ion battery Download PDFInfo
- Publication number
- CN202905821U CN202905821U CN2012205618702U CN201220561870U CN202905821U CN 202905821 U CN202905821 U CN 202905821U CN 2012205618702 U CN2012205618702 U CN 2012205618702U CN 201220561870 U CN201220561870 U CN 201220561870U CN 202905821 U CN202905821 U CN 202905821U
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- China
- Prior art keywords
- support plate
- lithium ion
- battery
- resilient support
- assembly structure
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- 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.)
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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 utility model relates to an assembly structure of a lithium ion battery, which is used for solving the problem of gradual loose due to untight contact between positive and negative pole piece diaphragms caused by multiple times of charging and discharging circulation of the lithium ion battery in the using process. According to a technique scheme, the assembly structure comprises a shell and pole-group battery cells arranged in the shell. The assembly structure is characterized by being provided with an elastic support plate, wherein the elastic support plate is arranged in the shell and located between a big surface of the shell and the pole-group battery cells or between pole-group battery cells units. Under the action of the elastic support plate, each pole piece and each diaphragm are contacted flatly and tightly, and in the charging and discharging processes of the battery, the reaction is uniform, the pole-group units are tight, dead areas are not generated, the expansion of the pole pieces is decreased, and the shell of the battery is effectively inhibited from expanding and deforming; and besides, the liquid retention of the lithium ion battery can be enhanced by a liquid absorption material layer, therefore, the filling quantity of the electrolytic solution of the battery can be increased, the electrolytic solution does not flow freely, and the pole-group battery cells are fully filled with the electrolytic solution, so that the service life of the battery is prolonged effectively and the safety of the battery is improved.
Description
Technical field
The utility model relates to a kind of storage battery, particularly can prevent from causing because of the lithium-ion battery shell distortion lithium ion battery assembly structure of battery performance decline, belongs to the battery technology field.
Background technology
Lithium ion battery has that operating voltage is high, energy density is large, have extended cycle life, the advantages such as self-discharge rate is little, environmental protection, be widely used in the portable type electronic product field, along with the development of lithium-ion-power cell technology is increasingly mature, its range of application is more and more extensive, and the industries such as motor vehicle, UPS, energy-accumulating power station are also increasing gradually to the demand of lithium-ion-power cell.Large capacity rectangular cell mainly contains coiling, Z-type lamination and barrier film and seals three kinds of structures of lamination, wherein the rectangular cell barrier film is sealed lamination and is possessed the easily advantage such as control of simple to operate, lamination quality because of it, and becomes the above high capacity lithium ion battery main separation of 200Ah pattern.Because large capacity rectangular lithium ion battery number of laminations is many, utmost point group battery core is thicker, may there be minimum gas in its inside, affect the compactness that contacts between pole piece and barrier film, in addition, battery is in the charge and discharge cycles process, and pole piece can expand repeatedly, the pole piece expansive force acts on housing, make the distortion of housing bulging, the primary flat of housing is larger, and the shell wall distortion is more serious; The elasticity of utmost point group battery core changes, contacting between positive/negative plate and barrier film is loose and inhomogeneous gradually, even the dead band can occur, thereby has affected the motion of inside battery ion, cause the problems such as internal resistance of cell increase, the cycle life of battery is reduced and security performance decline; In addition, lithium ion battery is in recycling process, and electrolyte can tail off gradually, thereby affects the transmission of lithium ion in battery, and the cycle performance of battery is variation gradually.
The utility model content
The utility model is used for solving the defective of above-mentioned prior art, provides a kind of and can prevent because of repeatedly charge and discharge cycles effect, causes occurring between both positive and negative polarity pole piece barrier film contacting not closely and gradually loose lithium ion battery assembly structure.
The alleged problem of the utility model solves by the following technical programs:
A kind of lithium ion battery assembly structure, it comprises housing and is installed in the interior utmost point group battery core of housing, special feature is: described assembly structure also is provided with the resilient support plate, and the resilient support plate is arranged in the housing, between large of housing and the utmost point group battery core or between each utmost point group battery core group.
Above-mentioned lithium ion battery assembly structure, described resilient support plate is comprised of waveform metal profile and imbibition material layer, uniform shape liquid drain hole on the described waveform metal profile, setting-in imbibition material layer between the crest of described waveform metal profile and the trough.
Above-mentioned lithium ion battery assembly structure, described resilient support plate comprises sheet metal and the imbibition material layer that admittedly closes with sheet metal, uniform liquid drain hole on the sheet metal, described imbibition material composite bed is provided with spring mounting hole, and spring fitting is connected in spring mounting hole and with sheet metal.
Above-mentioned lithium ion battery assembly structure, the sheet metal of described resilient support plate is positioned at the one or both sides of imbibition material layer, and wherein, the resilient support plate that both sides all arrange sheet metal is seated between each utmost point group battery core group; The resilient support plate that one side arranges sheet metal is seated between large of housing and the utmost point group battery core, and the inwall of its imbibition material layer and housing touches.
Above-mentioned lithium ion battery assembly structure, described resilient support plate is rectangle, the contour dimension coupling of its contour dimension and utmost point group battery core, the thickness of resilient support plate is the 2-10 millimeter, described waveform metal profile or sheet metal thickness are the 0.2-1 millimeter.
The utility model for large capacity square laminated plates structure lithium ion battery because of repeatedly charge and discharge cycles effect, cause between both positive and negative polarity pole piece barrier film occurring contact not closely and gradually loose problem improve, in lithium-ion battery shell, set up the resilient support plate that can continue to provide a supporting role to utmost point group battery core.Under the effect of resilient support plate, pole piece is more smooth closely with contacting of barrier film, make battery in charge and discharge process, reaction evenly, utmost point group can be not loose, can not produce the dead band, reduces pole piece and expand, establishment battery container bulging distortion has solved because of the battery gradually problem that increases of the loose internal resistance of cell that causes of utmost point group that repeatedly circulates; In addition, the imbibition material layer of described resilient support plate setting can strengthen lithium ion battery and protect the fluidity energy, can increase the electrolyte filling amount and can not flow freely, and makes electrolyte be flooded in utmost point group battery core, infiltrate more thorough, thereby the fail safe that effectively prolongs the useful life of battery and improve battery.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the utility model structural representation;
Fig. 2 is resilient support plate schematic diagram;
Fig. 3 is the A-A cutaway view of Fig. 2;
Fig. 4 is waveform metal profile schematic diagram;
Fig. 5 is another embodiment schematic diagram of the utility model;
Fig. 6 is another embodiment schematic diagram of resilient support plate;
Fig. 7 is the B-B cutaway view of Fig. 6;
Fig. 8 is the rearview of Fig. 6;
Fig. 9 is the resilient support plate schematic diagram that both sides all arrange sheet metal;
Figure 10 is the C-C cutaway view of Fig. 9;
Figure 11 is the rearview of Fig. 9.
Each list of reference numerals is among the figure: 1, housing, 2. utmost point group battery core, 3. resilient support plate, 4. waveform metal profile, 5, the imbibition material layer, 6, liquid drain hole, 7, spring mounting hole, 8, wavy spring, 9, sheet metal.
Embodiment
Referring to Fig. 1, Fig. 5, the utility model comprises housing 1 and is installed in the interior utmost point group battery core 2 of housing, for solving lithium ion battery in use because of repeatedly charge and discharge cycles effect, cause between both positive and negative polarity pole piece barrier film occurring not tight and gradually loose problem of contact, the utility model has been set up resilient support plate 3, the resilient support plate is arranged in the housing 1, between large of housing and utmost point group battery core 2, for the large capacity rectangular lithium ion battery of thickness greater than 65mm, a plurality of battery core utmost point group may be housed, also the resilient support plate can be contained in the middle of a plurality of battery core utmost point group, be used for supporting fitting tightly between the positive/negative plate barrier film, can also play the effect of heat radiation simultaneously.
Referring to Fig. 1-4, the first embodiment of the present utility model: described resilient support plate is comprised of waveform metal profile 4 and imbibition material layer 5, setting-in imbibition material layer between the crest of waveform metal profile and the trough.Uniform a plurality of circular liquid drain holes 6 on the described metal profile.Waveform metal profile 4 has good elasticity, and it is made by the metal material of electrolyte resistance, such as materials such as stainless steel, nickel plating spring steel.Imbibition material layer 5 is made for the high superfine fibre cotton of liquid absorption of electrolyte resistance, such as polypropylene superfine fiber non-woven cotton etc.The circular liquid drain hole 6 that arranges on the waveform metal profile can make the electrolyte of storing in the imbibition material layer spread in both positive and negative polarity pole piece and barrier film by this hole.
Referring to Fig. 5-8, another embodiment of the present utility model: described resilient support plate comprises sheet metal 9 and the imbibition material layer 5 that admittedly closes with sheet metal, uniform a plurality of circular liquid drain holes 6 on the sheet metal, at the imbibition material composite bed spring mounting hole 7 is set, spring 8 namely is installed in the spring mounting hole and with sheet metal and is connected, consider the elastic force of integral thickness and the spring of resilient support plate, described spring preferred wave shape form spring.Above-mentioned sheet metal and spring are made by the metal material of electrolyte resistance, such as materials such as stainless steel, nickel plating spring steel.
Sheet metal can be positioned at a side (as shown in Figure 7) or both sides (shown in Fig. 9-11) of imbibition material layer 5, wherein, the resilient support plate that both sides all arrange sheet metal is applicable to thickness greater than the large capacity rectangular lithium ion battery of 65mm, and it is seated between each utmost point group battery core group; The resilient support plate that one side arranges sheet metal is seated between housing 1 large face and the utmost point group battery core 2, and its imbibition material layer 5 touches (as shown in Figure 5) with the inwall of housing 1.
No matter resilient support plate 3 adopts above-mentioned which kind of structure, the contour dimension coupling of its contour dimension and utmost point group battery core 2, and the thickness of resilient support plate is the 2-10 millimeter, the thickness of waveform metal profile 4 or sheet metal 9 is the 0.2-1 millimeter.
Claims (5)
1. lithium ion battery assembly structure, it comprises housing and is installed in the interior utmost point group battery core of housing, it is characterized in that: described assembly structure is provided with resilient support plate (3), and the resilient support plate is arranged in the housing (1), be positioned between large of housing and the utmost point group battery core (2) or between each utmost point group battery core group.
2. lithium ion battery assembly structure according to claim 1, it is characterized in that: described resilient support plate (3) is comprised of waveform metal profile (4) and imbibition material layer (5), uniform liquid drain hole (6) on the described waveform metal profile, setting-in imbibition material layer between the crest of described waveform metal profile and the trough.
3. lithium ion battery assembly structure according to claim 1, it is characterized in that: described resilient support plate comprises sheet metal (9) and the imbibition material layer (5) that admittedly closes with sheet metal, uniform liquid drain hole (6) on the sheet metal, described imbibition material composite bed is provided with spring mounting hole (7), and spring (8) is installed in the spring mounting hole and with sheet metal and is connected.
4. lithium ion battery assembly structure according to claim 3, the sheet metal of described resilient support plate is positioned at the one or both sides of imbibition material layer, and wherein, the resilient support plate that both sides all arrange sheet metal is seated between each utmost point group battery core group; The resilient support plate that one side arranges sheet metal is seated between large of housing and the utmost point group battery core (2), and its imbibition material layer (5) touches with the inwall of housing (1).
5. according to claim 1 and 2 or 3 or 4 described lithium ion battery assembly structures, described resilient support plate (3) is rectangle, the contour dimension coupling of its contour dimension and utmost point group battery core (2), the thickness of resilient support plate is the 2-10 millimeter, and described waveform metal profile (4) or sheet metal (9) thickness are the 0.2-1 millimeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205618702U CN202905821U (en) | 2012-10-30 | 2012-10-30 | Assembly structure of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012205618702U CN202905821U (en) | 2012-10-30 | 2012-10-30 | Assembly structure of lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202905821U true CN202905821U (en) | 2013-04-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012205618702U Expired - Fee Related CN202905821U (en) | 2012-10-30 | 2012-10-30 | Assembly structure of lithium ion battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN202905821U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647105A (en) * | 2013-12-12 | 2014-03-19 | 奇瑞汽车股份有限公司 | Power battery |
| CN114566745A (en) * | 2022-01-28 | 2022-05-31 | 上海兰钧新能源科技有限公司 | Roll up core and battery |
-
2012
- 2012-10-30 CN CN2012205618702U patent/CN202905821U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647105A (en) * | 2013-12-12 | 2014-03-19 | 奇瑞汽车股份有限公司 | Power battery |
| CN114566745A (en) * | 2022-01-28 | 2022-05-31 | 上海兰钧新能源科技有限公司 | Roll up core and battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160722 Address after: 071057 Hebei province Baoding Fuchang Road No. 8 Patentee after: Fengfan Co., Ltd. Address before: 071057 Hebei province Baoding Fuchang Road No. 8 Patentee before: Fengfan Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20201030 |