CN202585597U - Cylindrical lithium-ion battery - Google Patents
Cylindrical lithium-ion battery Download PDFInfo
- Publication number
- CN202585597U CN202585597U CN2012201160396U CN201220116039U CN202585597U CN 202585597 U CN202585597 U CN 202585597U CN 2012201160396 U CN2012201160396 U CN 2012201160396U CN 201220116039 U CN201220116039 U CN 201220116039U CN 202585597 U CN202585597 U CN 202585597U
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- Prior art keywords
- battery
- pole piece
- foam metal
- ion battery
- metal layer
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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 the technical field of lithium-ion batteries and particularly relates to a cylindrical lithium-ion battery. The cylindrical lithium-ion battery comprises a battery housing, a pole piece group accommodated in the battery housing and a battery cover cap which is hermetically assembled and connected on the battery housing, wherein a central pipe is arranged at the center of the pole piece group, the pole piece group is formed by winding a positive pole piece, a negative pole piece and a diaphragm spaced between the positive pole piece and the negative pole piece, a blank current collector section is left on one side of the negative pole piece, and the blank current collector section is in conduction with the battery housing through a foam metal layer which is embedded at the bottom of the battery housing. Compared with the prior art, the cylindrical lithium-ion battery disclosed by the utility model adopts a welding-free embedded type contact way, and the negative pole piece of the battery is inserted into foam metal which is in close contact with the battery housing. As the embedding area of the blank current collector section of the negative pole piece of the battery in the foam metal is larger, the contact resistance can be effectively reduced; and the discharge ability of the cylindrical lithium-ion battery can be effectively upgraded, and the discharge current can be upgraded to 0-50A.
Description
Technical field
The utility model belongs to technical field of lithium ion, relates in particular to a kind of column lithium ion battery that can heavy-current discharge.
Background technology
When lithium ion battery uses as electrical appliance power supplys such as electric tools, need it to provide big electric current to guarantee the operate as normal of electrical appliance.The winding type lithium ion battery is the cylindrical steel case lithium ion battery particularly, and the lithium ion battery that is used as big multiplying power uses, and wherein pole piece and electric current are derived the contact resistance size of end (being generally lug), has greatly limited the size of battery discharge current.
Derive the contact resistance of end in order to reduce battery pole piece and electric current; Traditional technology is on battery pole piece, to increase the lug number; Thereby the contact point to increase battery pole piece and electric current derivation end reduces contact resistance, reaches the purpose that increases the lithium-ion electric discharging current thus.But; The location of a plurality of lugs and battery pole piece has increased the preparation difficulty of battery battery core; Battery pole ear and battery current are derived the welding of holding and are received the restriction of operating space simultaneously; So the lug number in the battery can't increase too much, can't further reduce battery pole piece and battery current and derive end in contact resistance, therefore causing the continuous discharge current range of the big magnification lithium ion battery of present multipole ear is 0-25A.
In view of this; Necessary a kind of column lithium ion battery is provided; Derive end in contact resistance with battery pole ear welding can't further reduction battery pole piece and battery current in the solution prior art, and then can't increase the problem of battery discharge current, make battery have the function of heavy-current discharge.
The utility model content
The purpose of the utility model is: to the deficiency of prior art; And a kind of column lithium ion battery is provided; To solve battery pole ear welding can't further reduction battery pole piece and battery current derivation end in contact resistance in the prior art; And then can't increase the problem of battery discharge current, make battery have the function of heavy-current discharge.
In order to achieve the above object, the utility model adopts following technical scheme:
A kind of column lithium ion battery; Comprise battery container, be contained in the interior pole piece group of said battery container, be filled in the electrolyte in the said battery container; And seal group is connected to the battery cap on the said battery container; The central authorities of said pole piece group are provided with central space, are provided with central tube in the said central space, said pole piece group by positive plate, negative plate and be interval in positive plate and negative plate between membrane coil around forming; One side of negative plate leaves blank collector section, and said blank collector section is arranged on the foam metal layer and the battery container conducting of battery container bottom through embedding.
In the utility model, battery container is also derived end as battery current simultaneously and is used except possessing the ability that takes up battery battery core structure and protection battery battery core.The resistance of foam metal self possesses anti-negative pole oxidability and high conductivity simultaneously less than 5m Ω.
As a kind of improvement of the utility model column lithium ion battery, the width of said blank collector section is 1-5mm.If the width of blank collector section is too little, the then difficult contact resistance that reduces pole piece and battery current derivation end; And, then can make corresponding the reducing of width layer of active material on the negative plate if the width of blank collector section is too big, cause the reduction of energy content of battery density.
As a kind of improvement of the utility model column lithium ion battery, the thickness of said foam metal layer is 1-6mm.If the thickness of foam metal layer is too little, the then difficult contact resistance that reduces pole piece and battery current derivation end; And, then can make corresponding the reducing of width layer of active material on the negative plate if the thickness of foam metal layer is too big, cause the reduction of energy content of battery density.
As a kind of improvement of the utility model column lithium ion battery, the thickness of said foam metal layer is 1.5-5.5mm.
As a kind of improvement of the utility model column lithium ion battery, said foam metal layer is foam copper layer or foam nickel dam, and they have property inserted and higher conductivity.
As a kind of improvement of the utility model column lithium ion battery, the contact portion of said foam metal layer and said blank collector section is filled with the conductive rubber layer.
As a kind of improvement of the utility model column lithium ion battery, the contact position of said foam metal layer and said battery container is partially filled to have the conductive rubber layer.The purpose of filled conductive glue-line is contacting between stable foam metal and pole piece, foam metal and the battery container; Battery battery core is being fixed in the battery housing in the position, the resistance that can guarantee the connector that foam metal and pole piece and battery container three form is less than 5m Ω.Conductive rubber injects through central tube.After the injection, battery battery core and battery container closely are pressed on one, and protect, thereby prepare the column lithium ion battery of high security feature through related accessory.
With respect to prior art, the utility model adopts a kind of unjointed embedded way of contact (negative plate is soldering polar ear not), and battery cathode sheet is inserted into battery current derives in the tight foam metal that contacts of end (being battery container).Because the contact area when the embedding area of the blank collector section of battery cathode sheet in foam metal is far longer than negative lug and negative plate welding, thereby can effectively reduce contact resistance; A side of negative plate all is embedded in the foam metal simultaneously, and its derived current distributes more even with respect to the electric current of local welding lug sheet derivation.Can effectively promote the discharge capability of column lithium ion battery thus, it is 0-50A that its discharging current size can be promoted by traditional 0-25A.
In addition; Because need not welding, the utility model do not derive lug on battery cathode sheet; Therefore be not limited by welding position and the welding space that lug and battery current are derived end, only needing the embedding area of control negative plate in foam metal is the scalable contact resistance, flexible and convenient operation.
Description of drawings
Below in conjunction with accompanying drawing and embodiment, the utility model and useful technique effect thereof are elaborated, wherein:
Fig. 1 is the cross-sectional view of the utility model;
Fig. 2 is the structural representation of negative plate in the utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but the execution mode of the utility model is not limited thereto.
As depicted in figs. 1 and 2; A kind of column lithium ion battery of the utility model; Comprise battery container 1, be contained in pole piece group 8 in the said battery container 1, be filled in the electrolyte in the said battery container 1; And seal group is connected to the battery cap 9 on the said battery container 1; The central authorities of said pole piece group 8 are provided with central space, are provided with central tube 5 in the said central space, said pole piece group 8 by positive plate 4, negative plate 2 and be interval in positive plate 4 and negative plate 2 between barrier film 3 reel and form; One side of negative plate 2 leaves blank collector section 21 (as shown in Figure 2), 21 sections foam metal layers 6 and battery container 1 conducting that are arranged on battery container 1 bottom through embedding of said blank collector.
The effect of battery container 1 not only is to carry battery battery core and protection battery battery core, is that also deriving end as the GND electric current uses, and is generally metals such as stainless steel or nickel-plated steel.The effect of blank collector 21 is and 6 embedded connections of foam metal layer, to replace traditional lug bond pattern, reduces contact resistance.
Wherein, the width of said blank collector section 21 is 1-5mm.
The thickness of said foam metal layer 6 is 1-6mm.
The thickness of said foam metal layer 6 is 1.5-5.5mm.
Said foam metal layer 6 is foam copper layer or foam nickel dam.
Said foam metal layer 6 is filled with conductive rubber layer 7 with the contact portion of said blank collector section 21.
Said foam metal layer 6 and the contact position of said battery container 1 be partially filled to have conductive rubber layer 7.
Conductive rubber layer 7 is a series of adhesive material with conductive capability; Can foam metal layer 6 and battery container 1, foam metal layer 6 and negative plate 2 be bonded together, increase the electrical conductivity effect between foam metal layer 6 and battery container 1, foam metal layer 6 and the negative plate 2 simultaneously.
During assembling, earlier negative plate 2, barrier film 3 and positive plate 4 are prepared pole piece group 8 through coiling, its septation 3 guarantees the obstruct fully between negative plate 2 and the positive plate 4 all the time.To be inserted into by the pole piece group 8 that negative plate 2, barrier film 3 and positive plate 4 are formed in the battery container 1; Blank collector section 21 on the negative plate 2 is embedded in the foam metal layer 6; Inject conductive rubber from central tube 5 then, make foam metal layer 6 and the contact portion of blank collector section 21 and the contact position part of foam metal layer 6 and said battery container 1 all be filled with conductive rubber layer 7.Conductive rubber layer 7 can make foam metal layer 6 be connected more closely with negative plate 2 with battery container 1, foam metal layer 6, and the resistance that can guarantee the connector that battery container 1, negative plate 2 and foam metal layer 6 threes form is less than 5m Ω.Welding block 9 on battery container 1 makes the positive pole ear of battery be electrically connected with block 9 at last.
Resistance sizes between foam metal layer 6 and the negative plate 2 is determined by the embedding area size of negative plate 2 empty collectors 21 in foam metal layer 6; Promptly bigger and thickness foam metal layer 6 can obtain the little contact resistance of healing more greatly when the width of negative plate 2 empty collectors 21; But in order to reduce of the influence of its both sizes for energy content of battery density; Need be that the width of blank collector section 21 is controlled to be less than 5mm less than 6mm with the THICKNESS CONTROL of foam metal layer 6.
Nothing through using the utility model is welded Embedded mode of communicating, can effectively reduce battery cathode sheet 2 and derive the contact resistance size of end with battery current, thereby promote the battery discharge ability.Thereby can the discharging current scope of battery be expanded by 0-25A is 0-50A.
According to the announcement and the instruction of above-mentioned specification, the utility model those skilled in the art can also carry out suitable change and modification to above-mentioned execution mode.Therefore, the embodiment that discloses and describe above the utility model is not limited to is in the protection range of the claim that also should fall into the utility model to some modifications and the change of the utility model.In addition, although used some specific terms in this specification, these terms are explanation for ease just, the utility model is not constituted any restriction.
Claims (7)
1. column lithium ion battery; Comprise battery container, be contained in the interior pole piece group of said battery container, be filled in the electrolyte in the said battery container; And seal group is connected to the battery cap on the said battery container; The central authorities of said pole piece group are provided with central space, are provided with central tube in the said central space, said pole piece group by positive plate, negative plate and be interval in positive plate and negative plate between membrane coil around forming; It is characterized in that: a side of negative plate leaves blank collector section, and said blank collector section is arranged on the foam metal layer and the battery container conducting of battery container bottom through embedding.
2. column lithium ion battery according to claim 1 is characterized in that: the width of said blank collector section is 1-5mm.
3. column lithium ion battery according to claim 1 is characterized in that: the thickness of said foam metal layer is 1-6mm.
4. column lithium ion battery according to claim 3 is characterized in that: the thickness of said foam metal layer is 1.5-5.5mm.
5. column lithium ion battery according to claim 1 is characterized in that: said foam metal layer is foam copper layer or foam nickel dam.
6. column lithium ion battery according to claim 1 is characterized in that: the contact portion of said foam metal layer and said blank collector section is filled with the conductive rubber layer.
7. column lithium ion battery according to claim 1 is characterized in that: the contact position of said foam metal layer and said battery container is partially filled to have the conductive rubber layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201160396U CN202585597U (en) | 2012-03-26 | 2012-03-26 | Cylindrical lithium-ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201160396U CN202585597U (en) | 2012-03-26 | 2012-03-26 | Cylindrical lithium-ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202585597U true CN202585597U (en) | 2012-12-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201160396U Expired - Lifetime CN202585597U (en) | 2012-03-26 | 2012-03-26 | Cylindrical lithium-ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202585597U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470558A (en) * | 2015-12-16 | 2016-04-06 | 山东精工电子科技有限公司 | Cylindrical lithium ion battery and manufacturing method therefor |
| CN110690408A (en) * | 2018-07-05 | 2020-01-14 | 宁德新能源科技有限公司 | Battery core and battery thereof |
| CN113871803A (en) * | 2021-09-01 | 2021-12-31 | 多氟多新能源科技有限公司 | Cylindrical battery cell adopting non-welding conductive connection and preparation method thereof |
| CN113921899A (en) * | 2021-10-15 | 2022-01-11 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
| CN114094286A (en) * | 2021-11-26 | 2022-02-25 | 多氟多新能源科技有限公司 | Preparation method of non-welding conductive connection battery cell and battery cell |
| CN114122632A (en) * | 2021-10-26 | 2022-03-01 | 上海道赢实业有限公司 | Conductive connection structure replacing tab welding, full-tab battery and preparation process thereof |
| CN114374000A (en) * | 2022-01-12 | 2022-04-19 | 江苏正力新能电池技术有限公司 | Battery and energy storage device |
| WO2023000629A1 (en) * | 2021-07-23 | 2023-01-26 | 重庆市紫建新能源有限公司 | Tab-free lithium ion battery and manufacturing method therefor |
-
2012
- 2012-03-26 CN CN2012201160396U patent/CN202585597U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470558A (en) * | 2015-12-16 | 2016-04-06 | 山东精工电子科技有限公司 | Cylindrical lithium ion battery and manufacturing method therefor |
| CN105470558B (en) * | 2015-12-16 | 2018-01-02 | 山东精工电子科技有限公司 | Cylindrical lithium ion battery and preparation method thereof |
| CN110690408A (en) * | 2018-07-05 | 2020-01-14 | 宁德新能源科技有限公司 | Battery core and battery thereof |
| WO2023000629A1 (en) * | 2021-07-23 | 2023-01-26 | 重庆市紫建新能源有限公司 | Tab-free lithium ion battery and manufacturing method therefor |
| CN113871803A (en) * | 2021-09-01 | 2021-12-31 | 多氟多新能源科技有限公司 | Cylindrical battery cell adopting non-welding conductive connection and preparation method thereof |
| CN113921899A (en) * | 2021-10-15 | 2022-01-11 | 珠海冠宇电池股份有限公司 | Battery with a battery cell |
| CN113921899B (en) * | 2021-10-15 | 2023-06-02 | 珠海冠宇电池股份有限公司 | Battery cell |
| CN114122632A (en) * | 2021-10-26 | 2022-03-01 | 上海道赢实业有限公司 | Conductive connection structure replacing tab welding, full-tab battery and preparation process thereof |
| WO2023070821A1 (en) * | 2021-10-26 | 2023-05-04 | 上海道赢实业有限公司 | Conductive connection structure for replacing tab welding and full-tab battery and manufacturing process therefor |
| CN114094286A (en) * | 2021-11-26 | 2022-02-25 | 多氟多新能源科技有限公司 | Preparation method of non-welding conductive connection battery cell and battery cell |
| CN114094286B (en) * | 2021-11-26 | 2024-05-14 | 多氟多新能源科技有限公司 | Preparation method of non-welding conductive connection battery cell and battery cell thereof |
| CN114374000A (en) * | 2022-01-12 | 2022-04-19 | 江苏正力新能电池技术有限公司 | Battery and energy storage device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121205 |