CN1352472A - Improved structure of battery current collector - Google Patents
Improved structure of battery current collector Download PDFInfo
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- CN1352472A CN1352472A CN00133023A CN00133023A CN1352472A CN 1352472 A CN1352472 A CN 1352472A CN 00133023 A CN00133023 A CN 00133023A CN 00133023 A CN00133023 A CN 00133023A CN 1352472 A CN1352472 A CN 1352472A
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- flow path
- electric current
- circulation flow
- metal foil
- closed loop
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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 invention discloses an improved structure of battery collecting current body composed of conducting metal foil net. Hollowing out the thin conducting metal foil produces the foil net. Conductor consituting current mainstream path, current branch path and current closed loop are laid on conducting metal foil net, making current circulating path shortened greatly. Thus, it makes current distribute to the whole structure rapidly and evenly so as to increase use rate of active material of electrode and reduce the current centralized on electrode lug.
Description
The present invention relates to a kind of polymer rechargeable cell structure, particularly relate to a kind of improved structure of battery current collector.
Polymer rechargeable cell, it is to make by integrated barrier assembly, so-called barrier assembly comprises positive pole, negative pole and electrolyte three parts at least.Positive and negative electrode is provided with the battery afflux liquid that is made of the conductive metal foil net.In the secondary cell manufacture process, the structure of the positive and negative collector of battery tends to influence the discharge performance and the cycle life of battery, because reasonably current collector structure can make battery CURRENT DISTRIBUTION in charge and discharge process even, otherwise, destroys local current because crossing ambassador's collector corrosion-vulnerable, the current limited system of battery discharge, collector is perishable impaired after repeatedly charging and discharging circulation.Known conductive metal foil net as battery afflux liquid is to be formed by thin conducting metal paillon foil hollow out, its openwork part is equally distributed rhombus (as shown in Figure 1) or circle, the conductive metal foil net of this shape, electric current flows along broken line, the circulation flow path path length, and resistance increases, hindered electric current fast, be evenly distributed on the battery afflux liquid, cause the battery local current excessive easily, activate inhomogeneously, easily produce polarization phenomena.
Purpose of the present invention just provides a kind of improved structure of battery current collector that battery CURRENT DISTRIBUTION in the process of charging and discharging is even, improve high-rate battery discharge that makes.
In order to achieve the above object, improved structure of battery current collector of the present invention mainly is made of the conductive metal foil net.Described conductive metal foil net is to be formed by thin conducting metal paillon foil hollow out, and described conductive metal foil is provided with the electric current main flow path, the electric current that are made of its entity part on the net and props up circulation flow path and circuit closed loop; Described circuit closed loop is the close access that forms along the conductive metal foil network edge; Electric current main flow path, electric current prop up and are interconnected between circulation flow path, the circuit closed loop and with openwork part symmetry piecemeal; The axis of described electric current major flow curb lug runs through the conductive metal foil net, and the two ends of electric current main flow path are communicated with the circuit closed loop, and links to each other with the lug that is terminated at the conductive metal foil network edge.
Because the present invention is provided with electric current main flow path on the net at the conductive metal foil as battery afflux liquid, electric current props up circulation flow path, circuit closed loop, make the current flowing path shorten greatly, thereby make electric current can be fast, be evenly distributed on the entire cell collector, increase the utilization rate of electrode active material, slowed down the phenomenon that lug place electric current is too concentrated.And owing to be provided with the circuit closed loop at the battery afflux liquid edge, this edged row structure can be kept the original structure of power cell anode-cathode collector, makes it not yielding and is torn, and has increased the sectional area of electronics circulation.
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 improves the structural representation of structure for the known batteries collector;
Fig. 2 is the structural representation of first embodiment of improved structure of battery current collector of the present invention;
Fig. 3 is the structural representation of second embodiment of improved structure of battery current collector of the present invention;
Electric core discharge performance comparison diagram under different multiplying that electric core that Fig. 4 makes for the improvement structure of battery afflux liquid of the present invention and known batteries collector are made.
As shown in Figure 2, be first embodiment of improved structure of battery current collector of the present invention.Improved structure of battery current collector of the present invention mainly is made of conductive metal foil net 1.Described conductive metal foil net 1 is to be formed by thin conducting metal paillon foil hollow out, and conductive metal foil net 1 is provided with electric current main flow path 11, electric current props up circulation flow path 12 and circuit closed loop 13.Described electric current main flow path 11, electric current prop up circulation flow path 12, circuit closed loop 13 is the entity part of conductive metal foil net 1, and the width of its entity is the 1/10-1/15 of lug 2 width approximately; Circuit closed loop 13 is the close access that forms along conductive metal foil net 1 edge; Electric current main flow path 11, electric current prop up and are interconnected between circulation flow path 12, the circuit closed loop 13 and with openwork part symmetry piecemeal; Described electric current main flow path 11 runs through conductive metal foil net 1 along the axis of lug 2, the two ends of electric current main flow path 11 are communicated with circuit closed loop 13, and link to each other with the lug 2 that is terminated at conductive metal foil net 1 edge, lug 2 is positioned at the middle part of conductive metal foil net 1 minor face.Described electric current props up circulation flow path 12 and is an angle with electric current main flow path 11, and the length-width ratio of neglecting battery afflux liquid greatly of its angle is different and decide, generally between 30 degree are spent to 60; Electric current props up circulation flow path 12 1 ends and is communicated with electric current main flow path 11, and the other end is communicated with circuit closed loop 13; Electric current main flow path 11 extends many electric currents to bilateral symmetry at regular intervals and props up circulation flow path 12, makes electric current prop up circulation flow path 12 and is the distribution of fishbone shape with electric current main flow path 11.Mesh 14 in the present embodiment is circular, also can be hexagon; Shape mesh 14 of the same size props up circulation flow path 12 with electric current at certain intervals and is arranged in parallel.
As shown in Figure 3, be second embodiment of improved structure of battery current collector of the present invention.Present embodiment and first embodiment are basic identical, and difference is: it is to constitute by parallel the circulation flow path 121 ' that is parallel to electric current main flow path 11 ' with a tiltedly circulation flow path 122 ' that electric current main flow path 11 ' is an angle that described electric current props up circulation flow path 12 '.Described parallel circulation flow path 121 ' two ends are connected in circuit closed loop 13 ' and join with an oblique circulation flow path 122 '; Tiltedly circulation flow path 122 ' one end is communicated with electric current main flow path 11 ', and the other end is communicated with circuit closed loop 13 '; Electric current main flow path 11 ' extends a many tiltedly circulation flow path 122 ' to bilateral symmetry at regular intervals, makes electric current prop up circulation flow path 12 ' and is the grating form distribution with electric current main flow path 11 '.Mesh 14 ' in the present embodiment is a grating structure, and the grid size unanimity is also certain at interval, is arranged in parallel with an oblique circulation flow path 122 '.
As shown in Figure 4, the electric core made of electric core of making for the netted battery afflux liquid that adopts first embodiment of the invention to propose and the known batteries collector performance of discharging under different multiplying relatively.
At room temperature, carry out the charge and discharge cycles experiment of constant-current constant-voltage charging and constant-current discharge with the multiplying power of 0.2 ℃ and 1 ℃, the charging/discharging voltage interval is respectively the 4.1-2.75 volt and 3.9-2.75 lies prostrate.What represent among the figure is the circulation discharge curve in the 3rd when circle, and solid line is the discharge curve of the electric core that adopts method of the present invention and make, and dotted line is the discharge curve of the electric core that adopts general structure and make.By these two kinds of different curve ratio as seen, adopt battery current collecting body structure of the present invention, the capacity that battery is emitted under identical discharge system is more, and working voltage platform is also higher.In addition, the loss late data of charge and discharge cycles have also proved the superiority of this battery current collecting body structure when battery changes into.When making the electric core of same model, the capacitance loss rate of ordinary production electricity core is between 30%-40%, and the electric core that uses this new battery current collecting body structure to produce, its loss late has only 10%-15%, greatly reduce the irreversible loss amount of capacity, the discharge performance of electric core is improved greatly.
Claims (4)
1, a kind of improved structure of battery current collector that mainly constitutes by the conductive metal foil net, described conductive metal foil net is to be formed by thin conducting metal paillon foil hollow out, it is characterized in that: described conductive metal foil is provided with the electric current main flow path, the electric current that are made of its entity part on the net and props up circulation flow path and circuit closed loop; Described circuit closed loop is the close access that forms along the conductive metal foil network edge; Electric current main flow path, electric current prop up and are interconnected between circulation flow path, the circuit closed loop and with openwork part symmetry piecemeal; The axis of described electric current major flow curb lug runs through the conductive metal foil net, and the two ends of electric current main flow path are communicated with the circuit closed loop, and links to each other with the lug that is terminated at the conductive metal foil network edge.
2, improved structure of battery current collector according to claim 1, it is characterized in that: described electric current props up circulation flow path and electric current main flow path is an angle, electric current main flow path extends many electric currents to bilateral symmetry at regular intervals and props up circulation flow path, make electric current prop up circulation flow path and electric current main flow path and be the fishbone shape and distribute that the other end that electric current props up circulation flow path is communicated with the circuit closed loop; Shape mesh of the same size props up circulation flow path with electric current at certain intervals and is arranged in parallel.
3, improved structure of battery current collector according to claim 1 is characterized in that: it is to constitute by parallel the circulation flow path that is parallel to electric current main flow path with a tiltedly circulation flow path that electric current main flow path is an angle that described electric current props up circulation flow path; Described parallel circulation flow path two ends are connected in the circuit closed loop and join with an oblique circulation flow path; Electric current main flow path extends a many tiltedly circulation flow path to bilateral symmetry at regular intervals, makes electric current prop up circulation flow path and is grating form with electric current main flow path and distributes, and tiltedly props up the other end connection circuit closed loop of circulation flow path; Shape mesh of the same size is arranged in parallel with an oblique circulation flow path at certain intervals.
4, according to any one described improved structure of battery current collector in the claim 1 to 3, it is characterized in that: the entity width that described electric current main flow path, the electric current that partly is made of the conductive metal foil network entity props up circulation flow path, circuit closed loop is the 1/10-1/15 of lug width approximately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00133023A CN1352472A (en) | 2000-11-15 | 2000-11-15 | Improved structure of battery current collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00133023A CN1352472A (en) | 2000-11-15 | 2000-11-15 | Improved structure of battery current collector |
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| CN1352472A true CN1352472A (en) | 2002-06-05 |
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| CN00133023A Pending CN1352472A (en) | 2000-11-15 | 2000-11-15 | Improved structure of battery current collector |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490895B (en) * | 2006-07-19 | 2012-10-03 | 丰田自动车株式会社 | Electric storage device |
| CN109935910A (en) * | 2017-12-19 | 2019-06-25 | 成都亦道科技合伙企业（有限合伙） | A kind of lithium battery electric core, lithium battery and preparation method thereof |
| CN109935839A (en) * | 2017-12-19 | 2019-06-25 | 成都亦道科技合伙企业（有限合伙） | A kind of collector, lithium battery electric core and lithium battery |
| CN111834637A (en) * | 2020-07-24 | 2020-10-27 | 江西理工大学 | Flexible lithium ion battery with multi-channel flexible current collector structure for reducing internal resistance and preparation method thereof |
-
2000
- 2000-11-15 CN CN00133023A patent/CN1352472A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101490895B (en) * | 2006-07-19 | 2012-10-03 | 丰田自动车株式会社 | Electric storage device |
| CN109935910A (en) * | 2017-12-19 | 2019-06-25 | 成都亦道科技合伙企业（有限合伙） | A kind of lithium battery electric core, lithium battery and preparation method thereof |
| CN109935839A (en) * | 2017-12-19 | 2019-06-25 | 成都亦道科技合伙企业（有限合伙） | A kind of collector, lithium battery electric core and lithium battery |
| CN109935910B (en) * | 2017-12-19 | 2024-04-02 | 成都大超科技有限公司 | Lithium battery cell, lithium battery and preparation method of lithium battery cell |
| CN109935839B (en) * | 2017-12-19 | 2024-04-02 | 成都大超科技有限公司 | Current collector, lithium battery cell and lithium battery |
| CN111834637A (en) * | 2020-07-24 | 2020-10-27 | 江西理工大学 | Flexible lithium ion battery with multi-channel flexible current collector structure for reducing internal resistance and preparation method thereof |
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