CN207489929U - Cover plate of power battery and the power battery using the cover board - Google Patents
Cover plate of power battery and the power battery using the cover board Download PDFInfo
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- CN207489929U CN207489929U CN201721482602.0U CN201721482602U CN207489929U CN 207489929 U CN207489929 U CN 207489929U CN 201721482602 U CN201721482602 U CN 201721482602U CN 207489929 U CN207489929 U CN 207489929U
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- China
- Prior art keywords
- power battery
- cover plate
- cover board
- connection sheet
- board matrix
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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 is related to a kind of cover plate of power batteries, including the connection sheet for being provided with the cover board matrix of mounting hole and being arranged in the mounting hole, the connection sheet is made of metal material with the cover board matrix, the connection sheet is molded insulated enclosure by resin with the cover board matrix and connect, and the connection sheet includes positive strap and negative straps.The cover plate of power battery of the utility model is sealed between connection sheet and cover board matrix by resin injection, and favorable sealing property, security performance is high, extends the service life of battery；In addition, the overall weight of cover board is obviously reduced as battery electrode column in connection sheet.
Description
Technical field
The utility model is related to power battery fields, should more specifically to a kind of cover plate of power battery and use
The power battery of cover board.
Background technology
With the fast development of new energy, lithium ion battery is widely used in electric tool, new-energy automobile, power grid storage
Can etc. related fields, however for power battery, people to the promotion of its energy density, the lightweight of battery system and
The requirement of three aspect of higher security performance more strong, however often exist should for power battery performance in practical applications
The deficiency of aspect is mainly manifested in three aspects：Single battery core energy density is smaller, cell system design is complicated, single battery core
The security risk that sealing performance is brought.
At present, the covering plate structure of power battery is generally using cover board matrix, copper aluminium pole, the molding work of upper and lower plastic-injection
Skill is processed molding, and the quality of the covering plate structure monomer is larger；In addition, the sealing structure of power battery, generally uses at present
The mode of sealing ring carries out crush seal (for example PFA, viton seal ring, polyethylene etc.), such sealing ring is when battery is long
Between during use, it is possible to fail in the case of high temperature or larger stress, carry out security risk to power battery band.
Utility model content
The technical problem to be solved by the present invention is to, for the drawbacks described above of the prior art, provide a kind of lightweight,
The cover plate of power battery of favorable sealing property and the power battery using the cover board.
Technical solution is used by the utility model solves its technical problem：A kind of cover plate of power battery is constructed, including
The connection sheet for being provided with the cover board matrix of mounting hole and being arranged in the mounting hole, the connection sheet and the cover board base
Body is made of metal material, and the connection sheet is molded insulated enclosure by resin with the cover board matrix and connect, the company
Contact pin includes positive strap and negative straps.
In some embodiments, it is additionally provided with liquid injection hole on the cover plate of power battery.
In some embodiments, it is additionally provided with explosive-proof protector hole on the cover plate of power battery.
In some embodiments, the cover board basis material is aluminum or aluminum alloy.
In some embodiments, the positive strap material is aluminum or aluminum alloy.
In some embodiments, the negative straps material is the compound of copper and aluminum or aluminum alloy.
In some embodiments, inwardly, aluminium end is outwardly at the copper end of the negative straps.
In some embodiments, the negative straps are combined to be formed by friction welding with aluminium for copper.
In some embodiments, the number of the mounting hole is 2.
The utility model also provides a kind of power battery using the cover plate of power battery, including battery case, is arranged on
Core in the battery case and the cover plate of power battery being arranged on the battery case.
Implement the cover plate of power battery of the utility model, have the advantages that：The power battery cover of the utility model
Plate, due to being sealed between connection sheet and cover board matrix by resin injection, which can allow connection sheet and cover board matrix
Close connection is molded by resin, thus there is good sealing performance, security performance is high, extends the useful life of sealing,
The service life of battery is also extended simultaneously；In addition, using the cover plate of power battery of this connection mode, connection sheet is as battery
Pole for the connection in series-parallel PACK in groups of late monomer battery, eliminates the pole contained in most of covering plate structure design at present
The presence of this bulk metal of column, is obviously reduced the overall weight of cover board, and then the quality of battery core is made significantly to reduce, very well
The energy density for improving single battery, for follow-up battery core connection in series-parallel formed PACK packets quality also greatly reduce, meet mesh
Preceding power battery lightweight, the developing direction for improving energy density.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the structure diagram of power battery in the utility model some embodiments；
Fig. 2 is the configuration schematic diagram of cover plate of power battery in the utility model some embodiments；
Fig. 3 is the vertical view of cover plate of power battery in the utility model some embodiments；
Fig. 4 is the sectional view of cover plate of power battery in the utility model some embodiments.
Specific embodiment
The utility model is further elaborated below in conjunction with specific embodiment.Wherein, attached drawing is only schematic diagram, right
Utility model plays the role of schematically illustrate, the not pictorial diagram of utility model, it is impossible to be interpreted as the limitation to this patent；And
In the embodiment of the utility model, some material objects are practical necessary component, and are public for those skilled in the art
Know, but because being influenced on utility model little, can omit it, some product sizes may since it is desired that and amplify or
It reduces, does not represent the size of actual product.
The structure diagram of power battery in some embodiments as shown in Figure 1 for the utility model, including battery case
1st, the battery roll core 2 being arranged in battery case 1 and the cover plate of power battery 3 being arranged on battery case 1.
As in Figure 2-4, which includes the cover board matrix 31 equipped with mounting hole 311, is arranged on mounting hole
Connection sheet 32 in 311 and the insulation resin part 33 for being coated on 32 periphery of connection sheet, cover board matrix 31 pass through with connection sheet 32
33 mutually insulated of insulation resin part is tightly connected.Cover board matrix 31 is made of metal material with connection sheet 32, insulation resin
Part 33 is molded by resin to be formed.Wherein, connection sheet 32 includes positive strap 321 and negative straps 322, and positive and negative electrode connects
Contact pin is engaged with cover board matrix 31 by resin injection, is sealed using the technology of metal-resin jointing-and-forming.
In some embodiments, the number of mounting hole 311 is 2, is respectively used to place positive strap 321 and cathode
Connection sheet 322.In some embodiments, insulation resin part 33 includes anode insulation resin part 331 and cathode insulation resin part
332, positive and negative electrode connection sheet is connect with cover board matrix 31 by positive and negative electrode insulation resin part insulated enclosure respectively.
The resin injection-moulding position of cover board matrix 31 is previously provided with the mounting hole 311 passed through for connection sheet 32, and when injection leads to
It crosses connection sheet 32 to be positioned across mounting hole 311, then carries out resin injection.In some embodiments, on cover board matrix 31
Liquid injection hole 312 is provided with, for the fluid injection process after power battery assembling.In some embodiments, may be used also on cover board matrix 31
Explosive-proof protector hole 313 is set, is abnormal inside power battery, when air pressure inside drastically increases, the valve in explosive-proof protector hole 313
Door is opened in time, is played the role of pressure release, is prevented power battery from exploding, the danger such as burning.
In some embodiments, the material of cover board matrix 31 is aluminum or aluminum alloy；The material of positive strap 321 for aluminium or
Aluminium alloy, the trade mark can be 1 system, 3 systems, 5 systems；For copper and aluminum or aluminum alloy compound, (copper aluminium passes through friction welding (FW) to negative straps 322
Be bonded together), can be set to copper end 3221 as shown in Figure 2 inwardly, aluminium end 3222 outwardly, copper end 3221 be inwardly in order to
Can with battery roll core lug carry out laser welding, aluminium end 3222 be outwardly in order to later stage battery series-parallel connection in groups when with external aluminium converge
Stream discharges into capable welding, and aluminium is chronically exposed in air and is not easy to be aoxidized, strong compared with the oxidation resistance of copper.
Resin is in some embodiments thermoplastic resin material, especially high temperature resistant, ageing-resistant, electrolyte resistance corrodes
Polyphenylene sulfide (PPS) material.
Following steps can be used when making in the cover plate of power battery 3：
S1, punching press cover board matrix 31 set mounting hole 311, liquid injection hole 312 and explosive-proof protector on cover board matrix 31
Hole 313；
S2, cover board matrix 31 and connection sheet 32 are surface-treated；
S3, the cover board matrix 31 with mounting hole 311 with connection sheet 32 in injection molding machine is had good positioning, is molded using resin
Cover board matrix 31, insulation resin part 33 and connection sheet 32 are bonded together by technique, after the completion of injection, obtain strong binding force,
The cover plate of power battery 3 of stiff stability, strong sealing performance.
Specifically, it can be used in field that injection molding machine is molded well known to technical staff, made using rational injection mold
Resin is well molded in the mounting hole 311 of cover board matrix 31, and injection molding machine carries out injection using hot runner to be helped to control resin
Injection temperature, and can reduce waste material so that save material.
The PPS materials that resin can be used by specially treated (have high temperature resistant, ageing-resistant, electrolyte resistance corrosion etc. well
Performance), this kind of material need to keep certain stability in atmosphere is aoxidized, and need to have higher mechanical strength and in gold
Need that there is larger bond strength during category-resin-bonded.
Combination between metal and resin needs to reach certain bond strength, can just make the cover plate of power battery 3 in property
Can on reach requirement.In order to which metal is made to carry out good engagement with resin, need to be surface-treated metallic matrix, and need
Reasonably to select resin material.The surface treatment may include following steps：
S21, anodic oxidation：Cover board matrix 31 and connection sheet 32 are subjected to pre-treatment and anodized respectively,
Cover board matrix 31 and connection sheet metal surface generation layer oxide film layer；
Specifically, the cover board matrix 31 and connection sheet 32 carry out pre-treatment, refer to polish to metal surface,
Then the basic operations such as oil removing, washing, alkaline etching, neutralization are carried out successively.The anodic oxidation refers to that technical staff is public in field
The anodizing technology known, and using well known anodic oxidation equipment in field, for example anodizing tank.The utility model is preferred
Anodic oxidation scheme be the cover board matrix 31 Jing Guo pre-treatment and connection sheet 32 are put into a concentration of 20wt% sulfuric acid it is molten
In liquid, temperature is controlled at 10-20 DEG C, and 10-15min is electrolysed under 20-25V voltages and obtains the anode oxidation membrane of 10-20um thickness.
S22, phosphoric acid processing：It is molten that cover board matrix 31 Jing Guo anodized in S21 and connection sheet 32 are immersed into phosphoric acid
In liquid, obtain being surface-treated complete cover board matrix 31 and connection sheet 32.
Specifically, the preferred phosphoric acid processing scheme of the utility model is using certain mass score and with halogen inorganic matter
The phosphoric acid solution of additive carries out the cover board matrix 31 after oxidation processes and connection sheet 32 phosphoric acid processing, and additive is solubility
The one or more of hydrochloride, for example sodium chloride, potassium chloride or aluminium chloride.The temperature of phosphoric acid processing is 20 DEG C -30 DEG C, the time
It for 60min, handles in six times, each 10min.Phosphoric acid processing can form etch pit, etch pit below in anode oxidation membrane
Follow-up thermoplastic resin is contributed to preferably to be combined in injection moulding process with metal, reaches higher bond strength.
Insulation resin part 33 is formed between above-mentioned connection sheet 32 and cover board matrix 31 by casting resin to be sealed, even
Anodized is first passed through in advance between contact pin 32 and insulation resin part 33 and between cover board matrix 31 and insulation resin part 33
One layer of anode oxide film is formd, and etch pit, thermoplastic resin are formd under anode oxidation membrane after being handled through peroxophosphoric acid
Fat can be combined with cover board matrix 31 well when being molded by etch pit.In some embodiments, insulation resin part
33 injection length is 36mm, width 15mm, and the thickness in 31 outer surface of cover board matrix is 6mm, in cover board matrix 31
The thickness of inner surface is 3mm.
The cover plate of power battery 3 of the utility model, due to passing through thermoplastic resin between connection sheet 32 and cover board matrix 31
It is sealed using metal-resin engagement, there is high intensity, high rigidity and preferable high temperature resistance, and which can
Connection sheet 32 is allowed closely to be connect with cover board matrix 31 with insulation resin part 33, insulation resin part 33, thus with good sealing
Performance, sealing security performance is high, extends the useful life of sealing, while also extend the service life of battery.
In addition, using the cover plate of power battery 3 of this connection mode, connection sheet 32 is used as battery electrode column, for later stage list
The connection in series-parallel of body battery PACK in groups eliminates this bulk metal of pole that contains in most of covering plate structure design at present
In the presence of the overall weight of cover board being obviously reduced, and then the quality of battery core is made significantly to reduce, improves single battery well
Energy density, for follow-up battery core connection in series-parallel formed PACK packets quality also greatly reduce, meet the lightweight of current driving force battery,
Improve the developing direction of energy density.
It should be understood that above example only expresses the preferred embodiment of the utility model, description is more specific
With it is detailed, but it should not be interpreted as limiting the scope of the present invention；It should be pointed out that for this field
Those of ordinary skill for, without departing from the concept of the premise utility, can to above-mentioned technical characterstic carry out freely
Combination, various modifications and improvements can be made, these belong to the scope of protection of the utility model；Therefore, it is all with this practicality
The equivalents and modification that novel right is done should all belong to the covering scope of the utility model claims.
Claims (10)
1. a kind of cover plate of power battery, which is characterized in that cover board matrix (31), Yi Jishe including being provided with mounting hole (311)
The connection sheet (32) in the mounting hole (311) is put, the connection sheet (32) uses metal with the cover board matrix (31)
Material is made, and the connection sheet (32) is molded insulated enclosure by resin with the cover board matrix (31) and connect, the connection sheet
(32) including positive strap (321) and negative straps (322).
2. cover plate of power battery according to claim 1, which is characterized in that note is additionally provided on the cover plate of power battery
Fluid apertures (312).
3. cover plate of power battery according to claim 1, which is characterized in that be additionally provided on the cover plate of power battery anti-
Quick-fried protection hole (313).
4. cover plate of power battery according to claim 1, which is characterized in that cover board matrix (31) material is aluminium or aluminium
Alloy.
5. cover plate of power battery according to claim 1, which is characterized in that positive strap (321) material is aluminium
Or aluminium alloy.
6. cover plate of power battery according to claim 1, which is characterized in that negative straps (322) material is copper
It is compound with aluminum or aluminum alloy.
7. cover plate of power battery according to claim 6, which is characterized in that the copper end of the negative straps (322)
(3221) inwardly, aluminium end (3222) outwardly.
8. cover plate of power battery according to claim 6, which is characterized in that the negative straps are for copper with aluminium by rubbing
Welding is wiped to be combined to be formed.
9. cover plate of power battery according to claim 1, which is characterized in that the number of the mounting hole is 2.
10. a kind of power battery including battery case, the core being arranged in the battery case and is arranged on the battery
Cover board on housing, which is characterized in that the cover board is the cover plate of power battery described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721482602.0U CN207489929U (en) | 2017-11-06 | 2017-11-06 | Cover plate of power battery and the power battery using the cover board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721482602.0U CN207489929U (en) | 2017-11-06 | 2017-11-06 | Cover plate of power battery and the power battery using the cover board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207489929U true CN207489929U (en) | 2018-06-12 |
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ID=62475998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721482602.0U Active CN207489929U (en) | 2017-11-06 | 2017-11-06 | Cover plate of power battery and the power battery using the cover board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207489929U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904357A (en) * | 2019-01-24 | 2019-06-18 | 浙江中泽精密科技有限公司 | A kind of cover plate assembly and its packaging technology of battery |
| CN113285109A (en) * | 2020-02-03 | 2021-08-20 | 阿发屋株式会社 | Pouch-shaped battery cell and method for manufacturing same |
-
2017
- 2017-11-06 CN CN201721482602.0U patent/CN207489929U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904357A (en) * | 2019-01-24 | 2019-06-18 | 浙江中泽精密科技有限公司 | A kind of cover plate assembly and its packaging technology of battery |
| CN113285109A (en) * | 2020-02-03 | 2021-08-20 | 阿发屋株式会社 | Pouch-shaped battery cell and method for manufacturing same |
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| GR01 | Patent grant |