CN209150236U - A kind of lithium ion battery of high security - Google Patents
A kind of lithium ion battery of high security Download PDFInfo
- Publication number
- CN209150236U CN209150236U CN201821943936.8U CN201821943936U CN209150236U CN 209150236 U CN209150236 U CN 209150236U CN 201821943936 U CN201821943936 U CN 201821943936U CN 209150236 U CN209150236 U CN 209150236U
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- positive
- blank area
- lithium ion
- ion battery
- high security
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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
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Abstract
The utility model belongs to technical field of lithium ion, more particularly to a kind of lithium ion battery of high security, including positive plate, negative electrode tab and the isolation film being arranged at intervals between the positive plate and the negative electrode tab, the positive plate is provided with positive pole ear at its 3/5 ~ 2/3 length, the negative electrode tab is provided with negative lug at its 3/5 ~ 2/3 length, and the positive pole ear and the negative lug are not overlapped.Compared with the prior art, during using high current fast charging and discharging, the electronics on pole piece can two-way circulate the utility model, and reducing the resistivity that pole piece is generated in charge and discharge reduces the risk of explosion on fire to slow down the heating of battery.
Description
Technical field
The utility model belongs to technical field of lithium ion more particularly to a kind of lithium ion battery of high security.
Background technique
Energy density is high, have extended cycle life, operating temperature range is wide, memory-less effect etc. is excellent because having for lithium ion battery
Point becomes the main power source of new energy electric motor vehicle.Coiled lithium ion battery technical maturity, consistency are higher, but pole piece
Length on coiling direction is longer.And current tab is generally welded to the head position of battery core positive and negative anodes pole piece, is melted into,
The electronics in pole piece tail portion need to be mobile to the tab position on head when sorting charging, leads to battery core internal resistance since path is longer
Excessive, when using high current fast charging and discharging, battery core temperature rise is higher, and battery core performance is on the one hand caused to decline, and on the other hand pacifies
Full blast is nearly larger, pole piece easily occurs and cross heat damage raw material structure leading to explosion phenomenon on fire.
Utility model content
The purpose of this utility model is that: in view of the deficiencies of the prior art, and provide a kind of lithium-ion electric of high security
Pond, during using high current fast charging and discharging, the electronics on the battery pole piece can two-way circulate, and reduce pole piece in charge and discharge
The resistivity generated when electric reduces the risk of explosion on fire to slow down the heating of battery.
To achieve the goals above, the utility model uses following technical scheme:
A kind of lithium ion battery of high security, including positive plate, negative electrode tab and be arranged at intervals at the positive plate and
Isolation film between the negative electrode tab, the positive plate are provided with positive pole ear at its 3/5 ~ 2/3 length, and the negative electrode tab exists
Negative lug is provided at its 3/5 ~ 2/3 length, the positive pole ear and the negative lug are not overlapped.
It should be noted that tab is arranged at 3/5 ~ 2/3 length of pole piece the utility model, make battery core using big electricity
Electronics two-way circulates when flowing charge and discharge, and resistance reduces, and whens charge and discharge, generated heat became smaller therewith, avoid battery core rise it is hot
Fried security risk.
A kind of improvement of lithium ion battery as high security described in the utility model, the positive plate include anode
Collector and positive active material, the plus plate current-collecting body are provided with positive blank area and positive coating area, the positive-active
Coating substance is in the two sides of the positive coating area.The utility model has saved coating using two-sided while coating form
Process and time, the i.e. two surface synchronizations painting in positive coating area are covered with positive active material, and when coating sets certain size
Range stops coating, two sides is made to reserve positive blank area when at 3/5 ~ 2/3 length, after reserving anode blank area
Continue coating until completing the coating of positive active material.Certainly, it is possible to use empty region is not reserved in full wafer coating, to whole
Piece positive and negative anodes reserve the blank of needs using the modes such as laser cleaning removal film area mode or scraper plate removal after being coated with
Region.
A kind of improvement of lithium ion battery as high security described in the utility model, the anode blank area are located at
At 3/5 ~ 2/3 length of the plus plate current-collecting body, the length of the anode blank area is less than or equal to the plus plate current-collecting body
Width, the positive pole ear are welded in the positive blank area.It is common, the length of positive blank area be 15 ~ 30mm or with just
The width of pole collector is equal, and the width of positive blank area is 6 ~ 20mm.
A kind of improvement of lithium ion battery as high security described in the utility model, the negative electrode tab include cathode
Collector and negative electrode active material, the negative current collector are provided with cathode blank area and cathode coating area, the negative electrode active
Coating substance is in the two sides of the cathode coating area.The utility model has saved coating using two-sided while coating form
Process and time, the i.e. two surface synchronizations painting in cathode coating area are covered with negative electrode active material, and when coating sets certain size
Range stops coating when reserved white space can be used at 3/5 ~ 2/3 length of positive/negative plate, two sides is made to reserve cathode sky
Coating is continued until completing the coating of positive active material, it is possible to use apply in full wafer in white area after reserving cathode blank area
Empty region is not reserved when cloth, and laser cleaning removal film area mode or scraper plate removal etc. are used after full wafer positive and negative anodes have been coated with
Mode come reserve need white space.
A kind of improvement of lithium ion battery as high security described in the utility model, the cathode blank area are located at
At 3/5 ~ 2/3 length of the negative current collector, the length of the cathode blank area is less than or equal to the negative current collector
Width, the negative lug are welded in the cathode blank area.It is common, the length of cathode blank area be 15 ~ 30mm or with it is negative
The width of pole collector is equal, and the width of cathode blank area is 6 ~ 20mm.
A kind of improvement of lithium ion battery as high security described in the utility model, when the positive coating area
When partial region is correspondingly arranged in the cathode blank area, corresponding with the cathode blank area part area in the anode coating area
The positive active material surface in domain is sticked and has protector.To ensure that positive pole ear and negative lug are not overlapped, positive blank area and
Cathode blank area need to guarantee certain safety away from, such that the positive coating area for being coated with positive active material correspond to it is negative
Pole blank area, therefore, to avoid generating analysis lithium phenomenon, positive active material surface of the utility model in corresponding partial region
Be sticked protective glue.
A kind of improvement of lithium ion battery as high security described in the utility model, the protective glue are also attached at
The positive pole ear and the negative lug.
A kind of improvement of lithium ion battery as high security described in the utility model, the protector are also provided at
It is not provided with the positive blank area of positive pole ear.Due to being two sides while being coated with, the one side of unwelded positive pole ear
Positive blank area can be exposed, therefore positive blank area is protected using protective glue, it is avoided to damage diaphragm.
A kind of improvement of lithium ion battery as high security described in the utility model, the protector are also provided at
It is not provided with the cathode blank area of negative lug.Due to being two sides while being coated with, the one side of unwelded negative lug
Cathode blank area can be exposed, therefore cathode blank area is protected using protective glue, it is avoided to damage diaphragm.
The utility model has the beneficial effects that: the utility model provides a kind of lithium ion battery of high security, including
Positive plate, negative electrode tab and the isolation film being arranged at intervals between the positive plate and the negative electrode tab, the positive plate is at it
Be provided with positive pole ear at 3/5 ~ 2/3 length, the negative electrode tab is provided with negative lug at its 3/5 ~ 2/3 length, it is described just
Pole tab and the negative lug are not overlapped.Compared with the prior art, the utility model is using high current fast charging and discharging
In the process, the electronics on pole piece can two-way circulate, and reduce the resistivity that pole piece is generated in charge and discharge, to slow down the liter of battery
Temperature reduces the risk of explosion on fire.
Detailed description of the invention
Fig. 1 is one of the structural schematic diagram of positive plate in the utility model.
Fig. 2 is the second structural representation of positive plate in the utility model.
Fig. 3 is the third structural representation of positive plate in the utility model.
Fig. 4 is one of the structural schematic diagram of negative electrode tab in the utility model.
Fig. 5 is the second structural representation of negative electrode tab in the utility model.
Fig. 6 is the third structural representation of negative electrode tab in the utility model.
Wherein: 1- plus plate current-collecting body, 2- positive active material, 3- positive pole ear, 4- cathode pole fluid, 5- negative electrode active material
Matter, 6- negative lug, 7- protective glue, 11- anode coating area, 12- anode blank area, 41- cathode coating area, the coating of 42- cathode
Area.
Specific embodiment
With reference to embodiment and Figure of description, the utility model is described in further detail, but this
The embodiment of utility model is not limited to this.
As shown in Fig. 1 ~ 6, a kind of lithium ion battery of high security, including positive plate, negative electrode tab and be arranged at intervals at
Isolation film between positive plate and negative electrode tab, positive plate are provided with positive pole ear 3 at its 3/5 ~ 2/3 length, and negative electrode tab is at it
Negative lug 6 is provided at 3/5 ~ 2/3 length, positive pole ear 3 and negative lug 6 are not overlapped.
Further, positive plate includes plus plate current-collecting body 1 and positive active material 2, and plus plate current-collecting body 1 is provided with positive sky
White area 12 and positive coating area 11, positive active material 2 are coated on the two sides of positive coating area 11.
Further, positive blank area 12 is located at 3/5 ~ 2/3 length of plus plate current-collecting body 1, the length of positive blank area 12
Degree is less than or equal to the width of plus plate current-collecting body 1, and positive pole ear 3 is welded in positive blank area 12.
Further, negative electrode tab includes negative current collector 4 and negative electrode active material 5, and negative current collector 4 is provided with cathode sky
White area 42 and cathode coating area 41, negative electrode active material 5 are coated on the two sides of cathode coating area 41.
Further, cathode blank area 42 is located at 3/5 ~ 2/3 length of negative current collector 4, the length of cathode blank area 42
Degree is less than or equal to the width of the negative current collector 4, and negative lug 5 is welded in cathode blank area 42.
Further, when the partial region of positive coating area 11 is correspondingly arranged in cathode blank area 42, positive coating area
The positive active material surface of 11 partial regions corresponding with cathode blank area 42 is sticked and has protector 7.
Further, protective glue 7 is also attached at positive pole ear 3 and negative lug 6.Protector 7, which is also provided at, to be not provided with
The positive blank area 12 of positive pole ear 3 and the cathode blank area 42 for being not provided with negative lug 5.
According to the disclosure and teachings of the above specification, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and is modified.Therefore, the utility model is not limited to above-mentioned specific embodiment, all this field skills
It is practical new that art personnel any conspicuous improvement made on the basis of the utility model, replacement or modification belong to this
The protection scope of type.In addition, these terms are intended merely to facilitate although using some specific terms in this specification
It is bright, any restrictions are not constituted to the utility model.
Claims (9)
1. a kind of lithium ion battery of high security, including positive plate, negative electrode tab and it is arranged at intervals at the positive plate and institute
State the isolation film between negative electrode tab, it is characterised in that: the positive plate is provided with positive pole ear at its 3/5 ~ 2/3 length, institute
It states negative electrode tab and is provided with negative lug at its 3/5 ~ 2/3 length, the positive pole ear and the negative lug are not overlapped.
2. the lithium ion battery of high security according to claim 1, it is characterised in that: the positive plate includes anode collection
Fluid and positive active material, the plus plate current-collecting body are provided with positive blank area and positive coating area, the positive electrode active material
Matter is coated on the two sides of the positive coating area.
3. the lithium ion battery of high security according to claim 2, it is characterised in that: the anode blank area is located at institute
It states at 3/5 ~ 2/3 length of plus plate current-collecting body, the length of the anode blank area is less than or equal to the width of the plus plate current-collecting body
Degree, the positive pole ear are welded in the positive blank area.
4. the lithium ion battery of high security according to claim 2, it is characterised in that: the negative electrode tab includes cathode collection
Fluid and negative electrode active material, the negative current collector are provided with cathode blank area and cathode coating area, the negative electrode active material
Matter is coated on the two sides of the cathode coating area.
5. the lithium ion battery of high security according to claim 4, it is characterised in that: the cathode blank area is located at institute
It states at 3/5 ~ 2/3 length of negative current collector, the length of the cathode blank area is less than or equal to the width of the negative current collector
Degree, the negative lug are welded in the cathode blank area.
6. the lithium ion battery of high security according to claim 5, it is characterised in that: when the portion of the positive coating area
When subregion is correspondingly arranged in the cathode blank area, corresponding with the cathode blank area partial region in the anode coating area
Positive active material surface be sticked and have protector.
7. the lithium ion battery of high security according to claim 6, it is characterised in that: the protector is also attached at institute
State positive pole ear and the negative lug.
8. the lithium ion battery of high security according to claim 6, it is characterised in that: the protector is also provided at not
It is provided with the positive blank area of positive pole ear.
9. the lithium ion battery of high security according to claim 6, it is characterised in that: the protector is also provided at not
It is provided with the cathode blank area of negative lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821943936.8U CN209150236U (en) | 2018-11-23 | 2018-11-23 | A kind of lithium ion battery of high security |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821943936.8U CN209150236U (en) | 2018-11-23 | 2018-11-23 | A kind of lithium ion battery of high security |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209150236U true CN209150236U (en) | 2019-07-23 |
Family
ID=67287293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821943936.8U Active CN209150236U (en) | 2018-11-23 | 2018-11-23 | A kind of lithium ion battery of high security |
Country Status (1)
| Country | Link |
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| CN (1) | CN209150236U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021189380A1 (en) * | 2020-03-26 | 2021-09-30 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| WO2023279257A1 (en) * | 2021-07-06 | 2023-01-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
-
2018
- 2018-11-23 CN CN201821943936.8U patent/CN209150236U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021189380A1 (en) * | 2020-03-26 | 2021-09-30 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113661605A (en) * | 2020-03-26 | 2021-11-16 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| CN113661605B (en) * | 2020-03-26 | 2023-06-27 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
| WO2023279257A1 (en) * | 2021-07-06 | 2023-01-12 | 宁德新能源科技有限公司 | Electrochemical device and electronic device |
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