CN110299481A - A kind of pin type lithium ion battery - Google Patents
A kind of pin type lithium ion battery Download PDFInfo
- Publication number
- CN110299481A CN110299481A CN201910652058.7A CN201910652058A CN110299481A CN 110299481 A CN110299481 A CN 110299481A CN 201910652058 A CN201910652058 A CN 201910652058A CN 110299481 A CN110299481 A CN 110299481A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- cover board
- ion battery
- shell
- stem
- 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
Links
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 87
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 83
- 229910052751 metal Inorganic materials 0.000 claims abstract description 52
- 239000002184 metal Substances 0.000 claims abstract description 52
- 238000003466 welding Methods 0.000 claims abstract description 24
- 230000002093 peripheral effect Effects 0.000 claims description 55
- 239000007924 injection Substances 0.000 claims description 14
- 238000002347 injection Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 11
- 239000003792 electrolyte Substances 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 2
- 238000009413 insulation Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000007789 sealing Methods 0.000 abstract description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 12
- 239000000463 material Substances 0.000 description 11
- 238000005260 corrosion Methods 0.000 description 9
- 230000007797 corrosion Effects 0.000 description 9
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 229910052744 lithium Inorganic materials 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 229920003023 plastic Polymers 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 230000003447 ipsilateral effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 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
- 230000003698 anagen phase Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000013519 translation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/102—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure
- H01M50/107—Primary casings, jackets or wrappings of a single cell or a single battery characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/152—Lids or covers characterised by their shape for cells having curved cross-section, e.g. round or elliptic
-
- 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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a kind of pin type lithium ion batteries, including cap, shell and bottom cover；It welds one end of the bottom cover and the shell；The cap includes stem, the ring part for being looped around stem periphery and the metal cover board for being looped around the ring part periphery, the other end welding of the metal cover board and shell；The connection of one pole of the stem and core, the stem is configured as an electrode as pin type lithium ion battery, the bottom cover is connect with another pole of the core, and the bottom cover, the shell and the metal cover board are configured as another electrode as the pin type lithium ion battery；Outer diameter≤8mm of the shell.Cap and bottom cover of the invention is connect with shell using welding manner respectively, and compared with riveting method in the prior art connection, pin type lithium ion battery sealing reliability of the invention is higher, and energy density is higher, and can carry out continuous miniaturization to battery.
Description
Technical field
The present invention relates to battery technology fields, more particularly, to a kind of pin type lithium ion battery.
Background technique
As the mature application of AI technology and internet enter all things on earth interconnection stage, the development of miniaturized electronic product is welcome
Golden age, wearable product such as wrist-watch, movement monitor；Medical assistance product such as hearing aid, specified disease monitor；Interconnection
Net acoustic control entrance such as bluetooth headset, miniature translation on line device；Smart home product such as Intelligent key, internet of things sensors are such as independent
Miniature light, electricity, sound, heat, electromagnetic sensor development will enter exponential growth phase, to matched energy source and power system for it
System, the demand of miniature rechargeable lithium ion batteries will be growing.
The definition that pin type lithium ion battery can wherein be filled is cell outside diameter R3-8 millimeters, the cylinder that 10-70 millimeters of height H
Can be charged nonexpondable lithium ion battery repeatedly.
Due to the limitation of manufacturing technology, the cover board for filling pin type lithium ion battery and shell currently on the market is using riveting
Mode connects, and causes the sacrifice in space in diameter and short transverse, and inside battery reduced space is unfavorable for mentioning for battery capacity
It rising, energy density per unit volume declines and there is hidden danger, wherein there are explosion-proof valve cracking pressure is too high or without explosion-proof valve,
Poor reliability, the short disadvantage of service life.
Summary of the invention
It is an object of the present invention to provide a kind of new solutions of pin type lithium ion battery.
According to an aspect of the present invention, a kind of pin type lithium ion battery is provided, the pin type lithium ion battery includes cap
Lid, shell and bottom cover；It welds one end of the bottom cover and the shell；
The cap includes stem, the ring part for being looped around stem periphery and the metal cover for being looped around the ring part periphery
The other end of plate, the metal cover board and shell welds；
The connection of one pole of the stem and core, the stem are configured as an electricity as pin type lithium ion battery
Pole, the bottom cover are connect with another pole of the core, and the bottom cover, the shell and the metal cover board are configured as conduct
Another electrode of the pin type lithium ion battery；
Outer diameter≤8mm of the shell.
Optionally, liquid injection hole is arranged in the metal cover board, and the liquid injection hole is configured as to the pin type lithium ion battery
Middle injection electrolyte；It further include pole on the metal cover board, the pole is configurable for blocking the liquid injection hole.
Optionally, the pole stretches out in the upper surface of the metal cover board, and connect with the core；The pole quilt
It is configured to connect as the electrode of lithium ion battery with external equipment.
Optionally, the stem is configured as stretching out in the upper surface of glassy layer, and the stem is as lithium ion battery
Electrode is attached with external equipment.
Optionally, it is provided with thinning area on the side wall of the shell, is formed with cutting on the thinning area.
Optionally, felt pad is arranged in the upper surface of the metal cover board.
Optionally, insulated support is provided between the metal cover board and core, the insulated support is arranged in institute
The inside at shell nozzle end is stated, and forms hollow structure.
Optionally, the metal cover board includes cover board peripheral assembly, and the lateral wall of the cover board peripheral assembly is fastened on shell
Outside the open end of body.
Optionally, the open end of the cover board peripheral assembly and the shell is sealed after being cooperatively connected by welding manner
Connection.
Optionally, the open end of the shell includes guide section interconnected and cooperation section, the outer diameter of the guide section
Less than the internal diameter of the lateral wall, the outer diameter of the cooperation section is greater than the internal diameter of the lateral wall, the cover board peripheral assembly
Lateral wall is fastened on outside the guide section and cooperation section.
Beneficial effects of the present invention: cap and bottom cover of the invention is connect with shell using welding manner respectively, and existing
Cover board in technology is compared with the connection of shell riveting method, and connection type of the invention is stronger, while pin type lithium ion battery
Leakproofness enhancing, inside battery space can be reasonably utilized, and be conducive to the energy density for improving battery.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Detailed description of the invention
It is combined in the description and the attached drawing for constituting part of specification shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the structural schematic diagram of pin type lithium ion battery of the present invention.
Fig. 2 is the structural schematic diagram of second of pin type lithium ion battery of the embodiment of the present invention.
Fig. 3 is the structural schematic diagram of the third pin type lithium ion battery of the embodiment of the present invention.
Fig. 4 is the structural schematic diagram of the 4th kind of pin type lithium ion battery of the embodiment of the present invention.
Fig. 5 is the structural schematic diagram of the cap of the embodiment of the present invention.
Fig. 6 is the structural schematic diagram of the 5th kind of pin type lithium ion battery of the embodiment of the present invention.
Fig. 7 is the structural schematic diagram of the 6th kind of pin type lithium ion battery of the embodiment of the present invention.
Specific embodiment
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should also be noted that unless in addition having
Body explanation, the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
Be to the description only actually of at least one exemplary embodiment below it is illustrative, never as to the present invention
And its application or any restrictions used.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
It is shown here and discuss all examples in, any occurrence should be construed as merely illustratively, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, then in subsequent attached drawing does not need that it is further discussed.
According to one embodiment of present invention, a kind of pin type lithium ion battery is provided, as shown in Figure 1, including cap, shell
14 and bottom cover 143, ring part 12 and stem 11.
The cap, shell 14 and bottom cover 143 are using seperated welding manner molding, and specifically, the shell 14 is hollow
Cylinder-like structure, the bottom cover 143 and one end of shell 14 connect using welding manner, and the cap is another with shell 14
End is connected using welding manner.
The shell 14 is sealed with bottom cover 143 using welding manner, and the shell 14 is using wall thickness less than 0.2 millimeter
High-strength stainless steel material, to avoid appearing in the pin hole being easy to appear when ultra-thin high-strength metal material integrally stretches and splitting
Line, to improve the reliability of battery.
The cap includes stem 11, is looped around the ring part 12 of 11 periphery of stem, and is looped around outside the ring part 12
The metal cover board 13 enclosed, the metal cover board 13 are sealed with shell 14 using welding manner.The material of ring part 12 is glass
Glass.
It is positive and negative to prevent that the first felt pad 130 is arranged in the upper surface of the ring part 12 and the upper surface of metal cover board 13
External short circuit between pole prevents pin type lithium ion battery when connecting with external equipment, stem 11 and metal cover board 13, shell
14 occur short circuit.
Outer diameter≤8mm of pin type lithium ion battery of the invention, the pin type lithium ion battery of the application can be applied to micro-
In small-sized electronic product, such as intelligent spire lamella, smartwatch, microminiature sounding device etc..
For example, as shown in Figure 1, the metal cover board 13 includes cover board peripheral assembly 131, the cover board peripheral assembly 131
In tabular.
The ring part 12 has annular inner surface and annular outer surface, the annular outer surface and the cover board peripheral group
The inner sidewall of part 131 is tightly connected, and the ring portion inner surface and stem 11 are tightly connected.
Optionally, there is the ring part 12 protruding parts B, the protruding parts B to coat the cover board peripheral assembly 131
Lower end surface, in this example, the structure design of 12 special shape of ring part can prevent pin type lithium ion battery in use process
In, the direct contact of anode ear 15 and metal cover board 13 (i.e. the cathode of pin type lithium ion battery) avoids pin type lithium-ion electric
Short circuit phenomenon inside pond.
Optionally, insulated support 20, the insulated support 20 are provided between the metal cover board 13 and core
The open end of shell 14 is set, and forms hollow structure.In soldering polar ear, tab is located at the hollow portion of insulated support 20
Position.On the one hand, the insulated support 20 is configurable for preventing core from moving along the axial direction of the pin type lithium ion.
Specifically, the upper surface of the insulated support 20 and the 13 lower end face contact of metal cover board, the insulated support 20
Lower end surface is contacted with the core；In testing experiment, such as in the fall-down test of pin type lithium ion battery, the insulation branch
Support member 20 can prevent the play of core, it is ensured that the stability of pin type inside lithium ion cell structure.On the other hand, described exhausted
Edge supporting element 20 can prevent pin type inside lithium ion cell from short circuit phenomenon occurs；Specifically, in the group of pin type lithium ion battery
During dress or during testing experiment (such as fall-down test of battery), the insulated support 20 can prevent uncoated
The anode ear 15 of insulating layer is contacted with the inner sidewall of shell 14, and then avoids pin type inside lithium ion cell short circuit phenomenon.
Optionally, connector 21 is arranged in the pin type inside lithium ion cell, specifically, is arranged in the lower section of anode ear 15
Connector 21, the connector 21 are connect with stem 11 using welding manner；For example, laser welding or supersonic welding can be used
It connects, punctures the connector 21 and anode ear 15, so that the connector 21 and stem 11 weld, to play fixed anode ear
15 effect；The inventors discovered that in the prior art, usually anode ear 15 is directly connected to stem 11, but anode ear
15 material is usually aluminium material, and the material of stem 11 is usually stainless steel material, unlike material welds together when, is being welded
Locate brittle alloy easy to form, solder joint is insecure, therefore when use connector 21 and the welding of stem 11, the connector 11 is used
With the identical material of the stem 11, anode ear 15, and firm welding can be preferably fixed.
According to one embodiment of present invention, as shown in Fig. 2, the first felt pad is arranged in the upper surface of metal cover board 13
130, the material of first felt pad 130 can select plastics, rubber etc.；Specifically, when stem 11 stretches out described first absolutely
The upper surface of edge pad 130, when the stem 11 is configured as an electrode as the pin type lithium ion battery, the shell
14, metal cover board 13 and bottom cover 143 can be as another electrodes of pin type lithium ion battery；For example, being used as needle in stem 11
When anode and the external equipment of formula lithium ion battery are attached, metal cover board 13 directly contacts hair with external equipment in order to prevent
Raw short circuit phenomenon etc., the first felt pad 130 is arranged in the upper surface of metal cover board 13 in the present invention, so that shell 14 or bottom cover 143
As the cathode of pin type lithium ion battery, the generation of external short circuit is avoided.
Optionally, as shown in Fig. 2, the second felt pad 132 is arranged in the lower end surface of cap, second felt pad 132 is
Annular insulating mat, second felt pad 132 are configurable for preventing anode ear 15 from contacting with the direct of cap, avoid pin type
For lithium ion battery in mounted inside, in use process or in test process, tab 15 is contacted with cover board 13 occurs internal short-circuit.
Optionally, the stem 11 is inverted T-type structure, and the area of the lower end surface of the stem 11 is greater than on the stem 11
The area of end face；The lower end surface of the stem 11 with anode ear 15 for connecting, the stem 11 of inverted T-type structure, so that with anode
The area that ear 15 connects is larger, facilitates the connection and fixation of anode ear.
According to one embodiment of present invention, as shown in figure 3, the metal cover board 13 includes cover board peripheral assembly 131, institute
State the U-shaped structure of cover board peripheral assembly 131.For example, the U-shaped profile of cover board peripheral assembly 131.
The open end of the shell 14 is in upper end closing, and the open end of the shell 14 includes guide section interconnected
141 and cooperation section 142, the lateral wall of the cover board peripheral assembly 131 and the open end of shell are fastened and connected.
Described to be fastened and connected using thrust button, wherein shell 14 is fixation side, and cap is activity side, by external force by cover board
The connection type of the propulsion shell 14 of peripheral assembly 131.
Specifically, the open end of the shell 14 and the lateral wall of cover board peripheral assembly 131 are fastened and connected so as to part dress
It is welded after matching.The open end of the shell 14 includes guide section 141 and cooperation section 142, the outside diameter d 2 of the guide section 141
Less than the internal diameter d1 of the lateral wall of the cover board peripheral assembly 131, the outer diameter of the cooperation section 142 is greater than the cover board peripheral group
The internal diameter of the lateral wall of part 131.The cover board peripheral assembly 131 with shell 14 be cooperatively connected when, cover board peripheral assembly 131
Lateral wall is fastened on outside the guide section and cooperation section, and specifically, the cover board peripheral assembly 131 is sequentially along guide section 142
It is fastened and connected with cooperation section 142 with shell 14.Since the outer diameter of cooperation section 142 is greater than the outside of the cover board peripheral assembly 131
The internal diameter of wall, so the fit system of the shell 14 and cover board peripheral assembly 131 is equivalent in the fit system of hole and axis
Interference fit, wherein the design of 14 open end of the shell provides the precision-fit of cover board and shell and good sealing is imitated
Fruit, and improve the reliability of welding.
The metal cover board 13 and shell 14 are all made of metal material, in this example, the metal cover board 13 and shell 14
To be tightly connected again with welding manner after snap fit, wherein metal cover board 13 and shell 14 fix it with manner
Afterwards, when then being welded, mutually transverse dislocation will not occur between the lateral wall and shell 14 of cover board peripheral assembly 131, simultaneously
It links together after metal and metal molten, can more effectively and reliably seal and prevents steam from entering, that improves battery can
By property.
Preferably, 131 height of cover board peripheral assembly is within the scope of 0-5mm.
According to one embodiment of present invention, a kind of pin type lithium ion battery is provided, as shown in figure 4, the pin type lithium
The stem 11 of ion battery is connect with a pole of core, and the stem 11 is configured as one electricity of pin type lithium ion battery
Pole；Specifically, the stem 11 is connect by anode ear 15 with core, and the stem 11 is configured as stretching out in described first absolutely
The upper surface of edge pad 130, the anode that the stem 11 can be used as pin type lithium ion battery are attached with external equipment.
In the prior art, when pin type lithium ion battery is attached by connecting line and external equipment, due to pin type lithium from
Inherently very little, junction are not easy to connect and fix the structure of sub- battery, it is easy to it leaks electricity, the accident potential such as short circuit；
In order to solve this technical problem, the inventors discovered that, when stem 11 stretches out the upper surface of the first felt pad 130, stem 11 is made
When being attached for the electrode of lithium ion battery by the modes such as grafting or welding and external equipment, the lithium ion battery and outer
The junction of portion's equipment can be stably connected with, while simplify connection type.
In one example, the component of the ring part 12 and the surface setting hydrofluoric acid corrosion resistance of electrolyte contacts, tool
Body, the lower end surface of the ring part 12 is provided with the component of hydrofluoric acid corrosion resistance, the component includes hydrofluoric acid corrosion resistance
Coating and/or hydrofluoric acid corrosion resistance part, keep ring part 12 long-term in pin type lithium-ion battery electrolytes environment
Reliably use.
In one example, as shown in figure 5, the ring part includes upper layer 121 and lower layer 122, the lower layer 122 is resistance to
The component of hydrofluoric acid corrosion.
The component of the hydrofluoric acid corrosion resistance includes corrosion-resistant glass, corrosion-resistant ceramic, any one in corrosion-resistant finishes
Kind.
The upper layer 121 be common inorganic nonmetallic materials, the common inorganic nonmetallic materials include simple glass and
Conventional ceramic.
According to one embodiment of present invention, a kind of pin type lithium ion battery is provided, as shown in fig. 6, the pin type lithium
The core of ion battery draws anode ear 15 and negative electrode lug, the anode ear are connect with stem 11, the negative electrode lug and bottom cover 143
Connection.
Liquid injection hole is arranged in the metal cover board 13, and the liquid injection hole is configured as injecting into the pin type lithium ion battery
Electrolyte；It further include pole 09 on the metal cover board 13, the pole 09 blocks institute after being configured in fluid injection
State liquid injection hole.
The pole 09 stretches out in the upper surface of the metal cover board 13, the pole 09 be configured as pin type lithium from
One electrode of subpool is connect with external equipment.
In this example, the stem 11 of the pin type lithium ion battery is as anode, the pole of the pin type lithium ion battery
09 is used as cathode, and the stem 11 and pole 09 are located at the ipsilateral of pin type lithium ion battery, and the stem 11 and pole 09 are non-right
Claim distribution, specifically, as shown in fig. 6-7, the stem 11 is set to the geometric center of the cap, and 11 periphery of stem, which is surround, to be set
Ring part 12 is set, 12 periphery of ring part is around setting metal cover board 13.Pole 09 is located on metal cover board 13.In metal cover board 13
Upper surface be provided with the first felt pad 130.
In this example, the stem 11 and pole 09 are located at the ipsilateral of lithium ion battery.This setup facilitates user
Assembly, since pole 09 is same polarity, such as cathode with shell and bottom cover.User both can choose stem 11 and ipsilateral pole
Column 09 is connect respectively as the two poles of the earth of pin type lithium ion battery with external circuit, also can choose stem 11 and bottom cover respectively as
The two poles of the earth of pin type lithium ion battery are connect with external circuit.In the prior art, the positive and negative anodes of battery are located at lithium ion battery
Both ends, the both ends of battery can only connect by user as the two poles of the earth with external circuit；It was found by the inventors of the present invention that passing through
Technical solution of the present invention, external circuit design can greatly simplify, while can reduce the volume of electronic equipment or product.
According to one embodiment of present invention, a kind of pin type lithium ion battery is provided, as shown in fig. 7, the pin type lithium
The stem 11 of ion battery is connect with a pole of core, the stem 11 be configured as electrode as pin type lithium ion battery with
External equipment connection；Specifically, the stem 11 is connect by anode ear 15 with core, and the stem 11 is configured as stretching out in
The upper surface of first felt pad 130, the stem 11 are attached as the anode of lithium ion battery with external equipment.
The pin type lithium ion battery includes pole 09, and the pole 09 is set on metal cover board 13, the pole 09
It is configured as connecting as the electrode of pin type lithium ion battery with external equipment；Wherein, the pole be configured as lithium from
The cathode of sub- battery is connect with external equipment.
In this example, the stem 11 of the pin type lithium ion battery is as anode, the pole of the pin type lithium ion battery
09 is used as cathode, and the stem 11 and pole are located at the ipsilateral of pin type lithium ion battery, and the stem 11 and pole 09 symmetrically divide
Cloth, specifically, the stem 11 are not disposed on the geometric center of the cap, and the stem 11 is positioned away from the pin type lithium
The position of ion battery central axis, the pole 09 are substantially symmetrical about its central axis about the pin type lithium ion battery with the stem 11.
Optionally, liquid injection hole is set on the metal cover board 13.After fluid injection, liquid injection hole is blocked using pole 09.
For example, pole 09 is welded in liquid injection hole.
Optionally, thinning area is set on the side wall of the shell 14, and the thickness of shell of the thinning area is less than non-thinning area
Thickness of shell；The thinning area is formed with cutting；In this example, when the air pressure inside of lithium ion battery reaches setting value,
Under the action of air pressure inside, the cutting cracking of thinning area cracks or gap, the crackle and gap are capable of forming gas
Leakage path, this enables internal gas to discharge.
According to one embodiment of present invention, the metal cover board 13 includes cover board peripheral assembly 131, the cover board periphery
The U-shaped structure of component 131.The cover board peripheral assembly 131 is fixedly connected by guiding parts with the shell 14.The present embodiment
Described in guiding parts be set as buffer part 18.
As shown in figure 4, the buffer part 18 is set between the inner sidewall and lateral wall of the cover board peripheral assembly 131 simultaneously
And the open end of the cover board peripheral assembly 131 is protruded from, the outer edge in the protrusion part of the buffer part 18, which is provided with, leads
To angle, the shell 14 is set in the protrusion exceptionally via the guide angle, the shell 14 and the cover board peripheral group
The lateral wall of part 131 is opposite.
According to one embodiment of present invention, as shown in figure 4, the U-shaped structure of the cover board peripheral assembly 131, described slow
Portion 18 is rushed to be set between the inner sidewall and lateral wall of the cover board peripheral assembly 131 and protrude from the cover board peripheral assembly
Guide angle is arranged in the outer edge of 131 open end, the protrusion part of the buffer part 18.The guide angle is arranged in the buffering
Chamfering is arranged in the two sides of the protrusion part lower end surface in portion 18.
The shell 14 is from top to bottom outside the outer peripheral guide angle and cover board along the protrusion part of the buffer part 18
The lateral wall for enclosing component 131 is opposite, wherein the link position of the shell 14 and cover board peripheral assembly 131 is placed in the guide angle
Upper apex angle A top.
In this example, there is no the inner space for occupying pin type lithium ion battery itself, the metals for the buffer part 18
Without using plastic part between cover board 13 and shell 14, removing cover board and the wall thickness of shell in the height direction can be used as placing
Battery roll core can be improved battery inner space utilization rate in short transverse, to improve battery energy density per unit volume.
Prior art cover plate and the riveting mode of shell use plastic part, and the plastic part is equivalent to washer setting
Between cover board and shell, the plastic part causes the sacrifice in space in diameter and short transverse, inside battery reduced space, no
Conducive to the promotion of battery capacity, energy density per unit volume decline.
When the shell 14 is completed to be welded again after part cooperates with cover board peripheral assembly 131 by buffer part 18,
In welding process, due to the guiding role and fixed function of buffer part 18, the lateral wall and shell 14 of cover board peripheral assembly 131 it
Between mutually transverse dislocation will not occur, improve the leakproofness of shell 14 Yu metal cover board 13.For example, delaying described in the present embodiment
Rushing portion 18 is plastic part.
The present embodiment cover board peripheral assembly uses U-shaped structure, increases welding position at a distance from insulated enclosure position, together
When pin type inside battery space it is small, when being welded together cover board peripheral assembly 131 and shell 14 indirectly using buffer part, generate
The cover board peripheral assembly 131 of a large amount of heat, U-shaped structure increases the heat-dissipating space of inside battery, plays the role of rapid cooling.
Wherein the insulating and sealing member is ring part 12.
According to one embodiment of present invention, the metal cover board 13 includes cover board peripheral assembly 131, the cover board periphery
The U-shaped structure of component 131, the cover board peripheral assembly 131 are fixedly connected by guiding parts with the shell 14.The present embodiment
Described in guiding parts be cover board peripheral assembly connected structure connected to the housing.
In one example, as shown in figure 5, the lateral wall of the cover board peripheral assembly 131 forms ring-shaped step structure
1311, specifically, annular protrusion structure can be formed in the lateral wall of cover board peripheral assembly 131, the outer wall of the shell 14 is set
It sets and is connected with the mutually matched groove of the bulge-structure, the cover board peripheral assembly by protrusion and groove inserting mode and shell
It connects.In this example, the structure of the protrusion and groove cooperation is connected structure.
In another example, the lateral wall of the cover board peripheral assembly 131 forms ring-shaped step structure 1321, specifically
Ground, can the lateral wall of cover board peripheral assembly 131 formed circular groove structure, the shell 14 outer wall setting with it is described recessed
The mutually matched protrusion of slot, the cover board peripheral assembly are connect by protrusion with groove inserting mode with shell.In this example, institute
The structure for stating protrusion and groove cooperation is connected structure.
The U-shaped structure of the cover board peripheral assembly 131, the cover board peripheral assembly 131 and shell by welding indirectly or
The mode directly welded is tightly connected, and in this example, the shell 14 completes zero by inserting mode with cover board peripheral assembly 131
When being welded again after part cooperation, in the welding process, due to the guiding role and fixed function of connected structure, cover board peripheral group
Mutually transverse dislocation will not occur between the lateral wall and shell 14 of part 131, improve the sealing of shell 14 Yu metal cover board 13
Property.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to being illustrated, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above embodiments.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of pin type lithium ion battery, which is characterized in that including cap, shell and bottom cover；The bottom cover and the shell
One end welding；
The cap includes stem, the ring part for being looped around stem periphery and the metal cover board for being looped around the ring part periphery,
The welding of the other end of the metal cover board and shell；
The connection of one pole of the stem and core, the stem are configured as an electrode as pin type lithium ion battery, institute
It states bottom cover to connect with another pole of the core, the bottom cover, the shell and the metal cover board are configured as described
Another electrode of pin type lithium ion battery；
Outer diameter≤8mm of the shell.
2. lithium ion battery according to claim 1, which is characterized in that liquid injection hole, the note is arranged in the metal cover board
Fluid apertures is configured as injecting electrolyte into the pin type lithium ion battery；It further include pole on the metal cover board, the pole
Column is configurable for blocking the liquid injection hole.
3. lithium ion battery according to claim 2, which is characterized in that the pole stretches out in the upper of the metal cover board
Surface, and connect with the core；The pole is configured as connecting as the electrode of lithium ion battery with external equipment.
4. lithium ion battery according to claim 1, which is characterized in that the stem is configured as stretching out in glassy layer
Upper surface, the stem are attached as the electrode of lithium ion battery with external equipment.
5. lithium ion battery according to claim 1, which is characterized in that it is provided with thinning area on the side wall of the shell,
Cutting is formed on the thinning area.
6. lithium ion battery according to claim 1, which is characterized in that insulation is arranged in the upper surface of the metal cover board
Pad.
7. lithium ion battery according to claim 1, which is characterized in that be provided between the metal cover board and core absolutely
The inside at the shell nozzle end is arranged in edge supporting element, the insulated support, and forms hollow structure.
8. lithium ion battery according to claim 1, which is characterized in that the metal cover board includes cover board peripheral assembly,
The lateral wall of the cover board peripheral assembly is fastened on outside the open end of shell.
9. lithium ion battery according to claim 8, which is characterized in that the cover board peripheral assembly is opened with the shell
Mouth end passes through welding manner after being cooperatively connected and is tightly connected.
10. lithium ion battery according to claim 8 or claim 9, which is characterized in that the open end of the shell includes mutually interconnecting
The guide section and cooperation section connect, the outer diameter of the guide section are less than the internal diameter of the lateral wall, and the outer diameter of the cooperation section is greater than
The internal diameter of the lateral wall, the lateral wall of the cover board peripheral assembly are fastened on outside the guide section and cooperation section.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652058.7A CN110299481A (en) | 2019-07-18 | 2019-07-18 | A kind of pin type lithium ion battery |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910652058.7A CN110299481A (en) | 2019-07-18 | 2019-07-18 | A kind of pin type lithium ion battery |
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| CN110299481A true CN110299481A (en) | 2019-10-01 |
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ID=68031426
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| CN201910652058.7A Pending CN110299481A (en) | 2019-07-18 | 2019-07-18 | A kind of pin type lithium ion battery |
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