CN105428566A - Lithium ion battery with low internal resistance and high shock resistance - Google Patents
Lithium ion battery with low internal resistance and high shock resistance Download PDFInfo
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- CN105428566A CN105428566A CN201510945105.9A CN201510945105A CN105428566A CN 105428566 A CN105428566 A CN 105428566A CN 201510945105 A CN201510945105 A CN 201510945105A CN 105428566 A CN105428566 A CN 105428566A
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- 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
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- 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
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- 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
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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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- 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
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Connection Of Batteries Or Terminals (AREA)
- Secondary Cells (AREA)
Abstract
本发明公开了一种低内阻高抗振锂离子电池，其特征在于：包括锂电池壳体、锂离子电芯、负极汇流盘、固定圈和正负极盖板，所述锂离子电芯置于锂电池壳体内，所述固定圈置于负极汇流盘上端，所述正极盖板和负极盖板分别置于锂电池壳体的上下两个端面，所述正负极盖板上还分别设有电极接触端子。本发明的优点在于：本发明结构简单，负极盖板接触固定圈，固定圈接触负极汇流盘，负极汇流盘接触电芯负极，电芯正极接触壳底，整个高度与壳体内部有效高度一致，将电芯固定于壳体内，提高电池的抗振性；同时电芯正极直接与壳体焊接，减少了中间连接步骤，降低了内阻和生产成本。
The invention discloses a lithium-ion battery with low internal resistance and high vibration resistance, which is characterized in that it comprises a lithium battery casing, a lithium-ion battery cell, a negative electrode confluence plate, a fixing ring and a positive and negative electrode cover plate, and the lithium-ion battery cell is placed in a lithium battery In the casing, the fixed ring is placed on the upper end of the negative electrode collector plate, the positive electrode cover plate and the negative electrode cover plate are respectively placed on the upper and lower end faces of the lithium battery case, and the positive and negative electrode cover plates are also respectively provided with electrode contacts. terminals. The advantages of the present invention are: the structure of the present invention is simple, the negative cover plate contacts the fixed ring, the fixed ring contacts the negative collector plate, the negative collector plate contacts the negative electrode of the battery cell, and the positive electrode of the battery cell contacts the bottom of the shell, and the entire height is consistent with the effective height inside the shell. The battery cell is fixed in the shell to improve the vibration resistance of the battery; at the same time, the positive electrode of the battery cell is directly welded to the shell, reducing intermediate connection steps, reducing internal resistance and production costs.
Description
技术领域 technical field
本发明属于锂电池通用技术领域，具体涉及一种低内阻高抗振锂离子电池。 The invention belongs to the general technical field of lithium batteries, in particular to a lithium-ion battery with low internal resistance and high vibration resistance.
背景技术 Background technique
随着电动汽车行业的迅速发展，对高性能锂离子电池的需求也越来越高。电动汽车在运行过程中要求电池比功率高，电池发热量小，同时汽车在运行过程中遇到颠簸、碰撞等情况时，要求电池性能保持稳定，电池内部电芯不会随轴向冲击或剧烈运动而导致电池内阻变大，容量变小甚至短路等问题。 With the rapid development of the electric vehicle industry, the demand for high-performance lithium-ion batteries is also increasing. During the operation of electric vehicles, the battery requires high specific power and low heat generation. At the same time, when the vehicle encounters bumps and collisions during operation, the performance of the battery is required to be stable, and the internal cells of the battery will not be impacted or violently Exercise will cause the internal resistance of the battery to increase, the capacity will become smaller, and even short-circuit and other problems.
发明内容 Contents of the invention
本发明的目的在于针对现有技术的不足，现提供一种低内阻高抗振锂离子电池。 The object of the present invention is to provide a low internal resistance and high anti-vibration lithium-ion battery for the deficiencies of the prior art.
为解决上述技术问题，本发明采用的技术方案为：一种低内阻高抗振锂离子电池，其创新点在于：包括锂电池壳体、锂离子电芯、负极汇流盘、固定圈和正负极盖板，所述锂离子电芯置于锂电池壳体内，所述固定圈置于负极汇流盘上端，所述正极盖板和负极盖板分别置于锂电池壳体的上下两个端面，所述正负极盖板上还分别设有电极接触端子。 In order to solve the above technical problems, the technical solution adopted in the present invention is: a low internal resistance and high vibration resistance lithium-ion battery, the innovation point of which is: including lithium battery casing, lithium-ion battery cell, negative electrode collector plate, fixed ring and positive and negative electrode cover plates , the lithium ion cell is placed in the lithium battery case, the fixing ring is placed on the upper end of the negative electrode collector plate, the positive electrode cover plate and the negative electrode cover plate are respectively placed on the upper and lower end faces of the lithium battery case, the positive Electrode contact terminals are respectively arranged on the negative cover plate.
进一步的，所述壳体开设有上放置腔、下放置腔和腔体夹层，所述腔体夹层上设有一注液孔，所述上放置腔内由下至上一次连接有锂离子电芯、负极汇流盘、固定圈和负极盖板，所述正极盖板置于下放置腔上，与壳体密封连接，所述正极盖板上还设有防爆阀。 Further, the housing is provided with an upper placement cavity, a lower placement cavity and a cavity interlayer, and a liquid injection hole is provided on the cavity interlayer, and lithium-ion batteries, lithium-ion batteries, Negative electrode collector plate, fixing ring and negative electrode cover plate, the positive electrode cover plate is placed on the lower storage chamber, and sealed with the casing, and the positive electrode cover plate is also provided with an explosion-proof valve.
进一步的，所述负极盖板与锂电池壳体顶端连接，正极盖板与锂电池壳体底端相连接，所述集流体上端的固定圈置于负极盖板与负极汇流盘之间，集流体与锂离子电芯负极相连接，所述锂离子电芯正极与锂电池壳体底端相连接。 Further, the negative electrode cover plate is connected to the top end of the lithium battery case, the positive electrode cover plate is connected to the bottom end of the lithium battery case, the fixed ring at the upper end of the current collector is placed between the negative electrode cover plate and the negative electrode collector plate, and the collector The fluid is connected to the negative electrode of the lithium ion battery cell, and the positive electrode of the lithium ion battery cell is connected to the bottom end of the lithium battery case.
进一步的，所述负极盖板与锂电池壳体之间的连接密封方式为激光连续焊接，所述正极盖板与锂电池壳体之间采取激光连续焊接的方式进行连接，所述负极汇流盘与锂离子电芯负极之间采取激光连续焊接的方式进行连接，所述锂离子电芯正极与锂电池壳体底端之间采取激光连续焊接的方式进行连接。 Further, the connection and sealing method between the negative electrode cover plate and the lithium battery case is laser continuous welding, the connection between the positive electrode cover plate and the lithium battery case is carried out by laser continuous welding, and the negative electrode bus plate The negative electrode of the lithium ion battery is connected by laser continuous welding, and the positive electrode of the lithium ion battery is connected with the bottom end of the lithium battery case by continuous laser welding.
本发明的有益效果如下：本发明结构简单，负极盖板接触固定圈，固定圈接触负极汇流盘，负极汇流盘接触电芯负极，电芯正极接触壳底，整个高度与壳体内部有效高度一致，将电芯固定于壳体内，提高电池的抗振性；同时电芯正极直接与壳体焊接，减少了中间连接步骤，降低了内阻和生产成本。 The beneficial effects of the present invention are as follows: the structure of the present invention is simple, the negative electrode cover plate contacts the fixed ring, the fixed ring contacts the negative electrode junction plate, the negative electrode junction plate contacts the negative electrode of the battery cell, and the positive electrode of the battery cell contacts the bottom of the shell, and the entire height is consistent with the effective height inside the shell , fix the cell in the shell, improve the vibration resistance of the battery; at the same time, the positive electrode of the cell is directly welded to the shell, reducing the intermediate connection steps, reducing the internal resistance and production cost.
附图说明 Description of drawings
图1为本发明的结构示意图。 Fig. 1 is a structural schematic diagram of the present invention.
具体实施方式 detailed description
以下由特定的具体实施例说明本发明的实施方式，熟悉此技术的人士可由本说明书所揭露的内容轻易地了解本发明的其他优点及功效。 The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
如图1所示为本发明的结构示意图，一种低内阻、高抗振锂电池，它包括负极盖板1、固定圈2、负极汇流盘3、电芯4、壳体5、正极盖板6。所述壳体开有上放置腔7和下放置腔8及腔体夹层9，腔体夹层上设有注液孔10，所述上放置腔内由下至上依次连接有电芯4、负极汇流盘3、固定圈2、负极盖板1，所述负极盖板1与负极汇流盘3连接，固定圈2置于负极盖板与负极汇流盘之间，负极汇流盘3与电芯4连接，电芯4与腔体夹层9连接；负极盖板1压入上放置腔7，通过激光连续焊接方式与壳体5密封，通过注液孔10注液后，将正极盖板6置于下放置腔8，通过激光连续焊接方式与壳体5密封，所述正极盖板6上设有防爆阀11。 As shown in Figure 1, it is a schematic structural diagram of the present invention, a low internal resistance, high vibration resistance lithium battery, which includes a negative electrode cover plate 1, a fixed ring 2, a negative electrode bus plate 3, a battery cell 4, a casing 5, and a positive electrode cover plate 6 . The housing is provided with an upper placement chamber 7, a lower placement chamber 8 and a cavity interlayer 9, the cavity interlayer is provided with a liquid injection hole 10, and the upper placement chamber is sequentially connected with a battery cell 4, a negative electrode confluence Disk 3, fixed ring 2, negative electrode cover plate 1, the negative electrode cover plate 1 is connected to the negative electrode collector plate 3, the fixed ring 2 is placed between the negative electrode cover plate and the negative electrode collector plate, the negative electrode collector plate 3 is connected to the battery cell 4, The battery cell 4 is connected to the interlayer 9 of the cavity; the negative cover plate 1 is pressed into the upper cavity 7, sealed with the casing 5 through laser continuous welding, and the positive cover plate 6 is placed on the bottom after injecting liquid through the liquid injection hole 10 The cavity 8 is sealed with the casing 5 by continuous laser welding, and the positive electrode cover plate 6 is provided with an explosion-proof valve 11 .
电芯4的正负极耳均为全极耳，使得极耳的焊接面积最大化，焊接更牢固，从而降低电池的内阻。卷绕好的电芯4全极耳整形后，电芯4一端与负极汇流盘3通过激光焊接连接，置于壳体上放置腔内7，将固定圈2置于负极汇流盘上3，压上负极盖板1，将电芯4另外一端与腔体夹层9通过激光焊接方式连接，将负极盖板1与壳体5通过激光焊接方式密封，密封完毕后电池进入下道工序进行注液，最后将正极盖板6置于铝壳下放置腔内8，将正极盖板6与壳体5通过激光焊接方式密封。 The positive and negative tabs of the battery cell 4 are all tabs, which maximizes the welding area of the tabs and makes the welding firmer, thereby reducing the internal resistance of the battery. After the wound cell 4 has been reshaped with all tabs, one end of the cell 4 is connected to the negative collector plate 3 by laser welding, placed on the housing and placed in the cavity 7, and the fixing ring 2 is placed on the negative collector plate 3, pressed Put on the negative cover plate 1, connect the other end of the battery cell 4 with the cavity interlayer 9 by laser welding, seal the negative cover plate 1 and the casing 5 by laser welding, after the sealing is completed, the battery enters the next process for liquid injection, Finally, the positive electrode cover plate 6 is placed in the cavity 8 under the aluminum shell, and the positive electrode cover plate 6 and the casing 5 are sealed by laser welding.
本发明结构简单，负极盖板1接触固定圈2，固定圈2接触负极汇流盘3，负极汇流盘3接触电芯4负极，电芯4正极接触壳底，整个高度与壳体5内部有效高度一致，将电芯4固定于壳体5内，提高电池的抗振性；同时电芯4正极直接与壳体5焊接，减少了中间连接步骤，降低了内阻和生产成本。 The structure of the present invention is simple, the negative cover plate 1 contacts the fixed ring 2, the fixed ring 2 contacts the negative junction plate 3, the negative junction plate 3 contacts the negative pole of the battery cell 4, and the positive pole of the battery cell 4 contacts the bottom of the case, and the entire height is the same as the effective height inside the case body 5 Consistent, the battery cell 4 is fixed in the casing 5 to improve the vibration resistance of the battery; at the same time, the positive electrode of the battery cell 4 is directly welded to the casing 5, reducing intermediate connection steps, reducing internal resistance and production costs.
上述实施例只是本发明的较佳实施例，并不是对本发明技术方案的限制，只要是不经过创造性劳动即可在上述实施例的基础上实现的技术方案，均应视为落入本发明专利的权利保护范围内。 The above-described embodiments are only preferred embodiments of the present invention, and are not limitations to the technical solutions of the present invention. As long as they are technical solutions that can be realized on the basis of the above-mentioned embodiments without creative work, they should be regarded as falling into the scope of the patent of the present invention. within the scope of protection of rights.
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| CN201510945105.9A CN105428566A (en) | 2015-12-17 | 2015-12-17 | Lithium ion battery with low internal resistance and high shock resistance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106025342A (en) * | 2016-06-30 | 2016-10-12 | 中天储能科技有限公司 | Low-cost aluminum-structured lithium ion battery |
| CN109119674A (en) * | 2018-10-16 | 2019-01-01 | 苏州创能新能源实业有限公司 | A kind of dynamic lithium battery |
| CN115513514A (en) * | 2022-09-06 | 2022-12-23 | 天津力神电池股份有限公司 | A single battery and its preparation method |
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