CN103178236A - Lithium battery external over-current protection device - Google Patents
Lithium battery external over-current protection device Download PDFInfo
- Publication number
- CN103178236A CN103178236A CN2013100725586A CN201310072558A CN103178236A CN 103178236 A CN103178236 A CN 103178236A CN 2013100725586 A CN2013100725586 A CN 2013100725586A CN 201310072558 A CN201310072558 A CN 201310072558A CN 103178236 A CN103178236 A CN 103178236A
- Authority
- CN
- China
- Prior art keywords
- lithium battery
- electrode
- flexible fusible
- fusible electrode
- lithium
- 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
Images
Classifications
-
- 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
Abstract
The invention provides a lithium battery external over-current protection device. The protection device comprises a lithium battery body, at least one electrode end of the lithium battery body is provided with a flexible fusible electrode, the flexible fusible electrode is composed of a fixed portion and a self-fusing portion, and the flexible fusible electrode is fixedly with a battery through the fixed portion. The protection device provided for the lithium battery (pack) is a mechanical protection device, and the flexible fusible electrode is welded onto the electrode end of the lithium battery body, so the self-fusing portion is instantly fused when a work current exceeds the maximal carrying current of the flexible fusible electrode, thereby the huge heat generation even explosion case of the internal of the lithium battery, caused by the external short circuit of the lithium battery, is avoided, and the safety performances of the lithium battery and used equipment are protected; and the connection between/among other lithium batteries in a battery pack is isolated, and the work of the other lithium batteries is not influenced.
Description
Technical field
The present invention relates to a kind of lithium battery, be specifically related to the protective device of the outside overcurrent of a kind of lithium battery.
Background technology
, noiselessness little due to the lithium battery environmental pollution, energy advantages of higher now are widely used in the fields such as mobile phone, notebook computer, automobile.Especially in recent years as a kind of new forms of energy, the electric automobile paid close attention to of people extremely, its groundwork principle was to provide electric energy by lithium battery to motor, the drive motor running, thus propelling vehicle advances.Power set as electric automobile are by a plurality of single lithium battery series and parallels, form high-power, jumbo lithium battery group.
If lithium battery external short circuit, internal short-circuit and overcharging etc. all can difficulty blast lithium cell core, the person, economic asset etc. all there is certain injury.As during lower than 2.4V, allowing battery capacity produce permanent decline, and both positive and negative polarity be short-circuited, thereby cause lithium battery to blast higher than 4.2V or lithium cell discharge voltage when the lithium cell core charging voltage.Also have when the electric current of lithium battery is excessive, lithium ion has little time to enter memory location, can be gathered in material surface, and lithium battery is blasted.The short circuit of lithium battery outside refers to the caused short circuits such as the design of the excessive or battery pack built-in electrical insulation of the foreign current of battery core is bad, when the battery core outside is short-circuited, when electronic building brick is failed again cut-off loop, battery core is inner can produce high heat, cause the vaporization of part electrolyte, li battery shell is burst and exploded.In particular as the lithium battery group of the automobile power energy, in case after some lithium batteries are blasted, can guide coupled lithium battery in succession to blast due to the diffusion of heat, have not only had a strong impact on travelling of vehicle, also bring potential safety hazard.Although at present overcharging of lithium battery all designed flexible fusible electrode with the internal short-circuit situation with charger avoids lithium battery to blast, caused the situation that short circuit is exploded still to exist for the outside overcurrent of lithium battery.
At present generally to monitor and control the parameters such as voltage, electric current of lithium battery when its work by software to the protection of battery pack.If but the time marquis of software failure, all lithium batteries just are in state out of control, do not have a kind of when effectively avoiding the lithium battery external short circuit to its means of protecting, happen occasionally so the phenomenon of lithium battery blast is still.
Summary of the invention
Purpose of the present invention just is to provide the protective device of the outside overcurrent of a kind of lithium battery, avoids lithium battery to cause inside battery to produce huge heat and explosion phenomenon because electric current is excessive.
In order to reach above-mentioned effect; the invention provides the protective device of the outside overcurrent of a kind of lithium battery; comprise the lithium battery body; at least one electrode tip of described lithium battery body is installed with flexible fusible electrode; described flexible fusible electrode by fixed part with form from fusing section, described flexible fusible electrode is fixedly connected with electrode by fixed part.
The preferred version of such scheme is that the material of described flexible fusible electrode is preferably aluminum slice, but its material is not limited to again aluminium, as nickel etc.; The thickness of described aluminum slice is 0.1-1mm.
When this device is used for battery pack is protected, a plurality of flexible fusible electrodes can be connected into a baffle, the upper surface of described baffle is welded with collector plate, and the position with respect to flexible fusible electrode on described collector plate is provided with the hole.Collector plate is as the large power, electrically circulation road of battery pack.
In order to protect the fail safe of lithium battery body; described flexible fusible electrode overcurrent protection threshold values is according to the different lithium battery behavior and the different application of the lithium battery group in groups requires to determine; generally, the overcurrent protection threshold values of described flexible fusible electrode be lithium battery body discharge-rate 5-20 doubly.The design guarantees normal current-carrying under the specific currents scope, surpasses fusible of specific currents scope, thereby has protected the lithium battery body be without prejudice or explode.
Described flexible fusible electrode is fixed by the electrode welding of fixed part and lithium battery body.
The shape of the flexible fusible electrode in the present invention is restriction not, and its size is suitable with battery electrode, and its shape can be helical form, U-shaped shape, L-type etc., and wherein helical form, U-shaped shape are best, the mechanical stress in the time of can eliminating work.The fixed part of flexible fusible electrode satisfies should not rupture when being welded on electrode of lithium cell and gets final product with reliability; section utilizes the fusing point of material low from fusing; can fuse moment when surpassing the maximum current-carrying of its design, serve as action of fuse, thereby protected the lithium battery body to be without prejudice.
The electric current of maximum is that 20A is when following when this protective device is applied in work; fixed part on the flexible fusible electrode of aluminium material is welded on the negative or positive electrode of lithium battery body, also can all welds flexible fusible electrode on positive and negative the two poles of the earth of lithium battery body.During work, electric current is transferred to by flexible fusible electrode and needs on electric equipment.When its operating current surpassed the maximum current-carrying of flexible fusible electrode design, it had avoided lithium battery to produce because of overcurrent the situation that external short circuit causes the lithium battery blast from the moment fusing of fusing section, has protected the security performance of lithium battery with the equipment of use.
When the load current of maximum surpasses the situation of 20A when this protective device is applied in work; when namely using the lithium battery group to power; the baffle that a plurality of flexible fusible electrodes are connected into first is welded on collector plate; soldering member with collector plate and baffle is installed on battery pack again; and the fixed part on each flexible fusible electrode is welded to any one electrode on each corresponding lithium battery monomer, also can be installed on positive and negative the two poles of the earth.During work; when if the electric current by some flexible fusible electrodes surpasses the maximum current-carrying of its design; certainly the fusing section of flexible fusible electrode can moment fusing; thereby protect this single lithium battery to avoid the generation of its blast situation; and cut off the contact between other lithium batteries in the battery pack, do not affect the work of other lithium batteries.
The present invention has following beneficial effect:
1, the present invention provides a kind of mechanical protective device to lithium battery (group), by the flexible fusible electrode of welding on its electrode, and the coefficient of safety when having protected lithium battery work.
2, when single lithium battery is protected; when as long as operating current surpasses the maximum current-carrying of flexible fusible electrode design; it is from the moment fusing of fusing section; avoid lithium battery to produce because of overcurrent the situation that external short circuit causes the lithium battery blast, protected the security performance of lithium battery with the equipment of use.
3, when the lithium battery group is protected; the baffle that a plurality of flexible fusible electrodes are connected into first is welded on collector plate; again the fixed part on each flexible fusible electrode is welded on the electrode on each corresponding lithium battery monomer; when if the electric current by some flexible fusible electrodes surpasses the maximum current-carrying of its design; certainly the fusing section of flexible fusible electrode can moment fusing; thereby protect this single lithium battery to avoid the generation of its blast situation; and cut off the contact between other lithium batteries in the battery pack, do not affect the work of other lithium batteries.
4, flexible fusible electrode of the present invention can be eliminated the stress that adds man-hour, improves its useful life.
Description of drawings
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Fig. 1 is flexible fusible electrode the first structural representation;
Fig. 2 is flexible fusible electrode the second structural representation;
Fig. 3 is the structural representation of baffle;
Fig. 4 is the structural representation of collector plate;
Fig. 5 is the soldering member schematic diagram of baffle of the present invention and collector plate;
Fig. 6 is that the present invention is arranged on the structural representation on the lithium battery group;
In figure: the flexible fusible electrode of 1-, 11-fixed part, 12-be from fusing section, 2-baffle, 3-collector plate, 4-hole, 5-lithium electricity body body.
Embodiment
Flexible fusible electrode the first structural representation as shown in Figure 1, flexible fusible electrode 1 in the shape of a spiral, by fixed part 11 with form from fusing section 12; The material of described flexible fusible electrode 1 is aluminum slice, and the thickness of described aluminum slice is 0.1mm, and the overcurrent protection threshold values of flexible fusible electrode 1 is 5-20 times of lithium battery body discharge-rate.
Flexible fusible electrode the second structural representation as shown in Figure 2; flexible fusible electrode 1 is U-shaped shape; by fixed part 11 with form from fusing section 12; the material of described flexible fusible electrode 1 is aluminum slice; the thickness of described aluminum slice is 1mm, and the overcurrent protection threshold values of flexible fusible electrode 1 is 5-20 times of lithium battery body discharge-rate.
Be the structural representation of baffle as shown in Figure 3, baffle 2 is to connect into an integral body by a plurality of flexible fusible electrodes 1, flexible fusible electrode 1 in the shape of a spiral, by fixed part 11 with form from fusing section 12.
Be the structural representation of collector plate as shown in Figure 4, the position with respect to flexible fusible electrode on collector plate 3 is provided with hole 4.
Baffle and collector plate soldering member schematic diagram as shown in Figure 5; connect into an integral body by a plurality of flexible fusible electrodes 1 and form baffle 2; the upper surface of baffle 2 is welded with collector plate 3; position with respect to flexible fusible electrode 1 on described collector plate 3 is provided with hole 4, and collector plate 3 is as the large power, electrically circulation road of battery pack.
That the present invention is arranged on the structural representation on the lithium battery group as shown in Figure 6, the battery pack that lithium battery body 5 forms.Be welded with the large power, electrically circulation road collector plate 3 as battery pack in the upper surface that a plurality of flexible fusible electrodes 1 connect into a baffle 2, the position with respect to flexible fusible electrode 1 on described collector plate 3 is provided with hole 4.First baffle 2 is welded on collector plate 3; again the soldering member of collector plate 3 with baffle 2 is installed on battery pack; and the fixed part on each flexible fusible electrode 1 is welded to any one electrode on each corresponding lithium battery monomer, also can be installed on positive and negative the two poles of the earth.The maximum current-carrying of described flexible fusible electrode 1 is 5-20 times (5C-20C) of battery body discharge-rate; When on the electric current that passes through can moment fusing when surpassing the maximum current-carrying of its design, served as action of fuse, thereby protected the lithium battery body be without prejudice or explode.
Above embodiment is not limited only to protection scope of the present invention, all modify based on basic thought of the present invention or change all belong to protection scope of the present invention.
Claims (5)
1. the protective device of the outside overcurrent of a lithium battery; comprise the lithium battery body; it is characterized in that: at least one electrode tip of described lithium battery body is welded with flexible fusible electrode; described flexible fusible electrode by fixed part with form from fusing section, described flexible fusible electrode is fixedly connected with battery by fixed part.
2. the protective device of the outside overcurrent of a kind of lithium battery according to claim 1, it is characterized in that: the material of described flexible fusible electrode is aluminum slice, the thickness of described aluminum slice is 0.1-1mm.
3. the protective device of the outside overcurrent of a kind of lithium battery according to claim 1; it is characterized in that: a plurality of flexible fusible electrodes connect into baffle; the upper surface of described baffle is welded with collector plate, is provided with the hole with respect to flexible fusible electrode position on described collector plate.
4. the protective device of the outside overcurrent of a kind of lithium battery according to claim 1 is characterized in that: the overcurrent protection threshold values of described flexible fusible electrode be lithium battery body discharge-rate 5-20 doubly.
5. the protective device of the outside overcurrent of a kind of lithium battery according to claim 1, it is characterized in that: described flexible fusible electrode is fixed by the electrode welding of fixed part and lithium battery body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100725586A CN103178236A (en) | 2013-03-07 | 2013-03-07 | Lithium battery external over-current protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100725586A CN103178236A (en) | 2013-03-07 | 2013-03-07 | Lithium battery external over-current protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103178236A true CN103178236A (en) | 2013-06-26 |
Family
ID=48637959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013100725586A Pending CN103178236A (en) | 2013-03-07 | 2013-03-07 | Lithium battery external over-current protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103178236A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105702908A (en) * | 2016-01-20 | 2016-06-22 | 华霆（合肥）动力技术有限公司 | Multi-stage over-current protection device of lithium ion battery |
| CN106450128A (en) * | 2016-10-18 | 2017-02-22 | 许继电源有限公司 | Battery group and electrode current piece thereof |
| CN106784567A (en) * | 2017-01-18 | 2017-05-31 | 华霆（合肥）动力技术有限公司 | Prevent the power supply and electric power system of battery thermal runaway |
| JP2018521446A (en) * | 2015-05-11 | 2018-08-02 | ゴゴロ インク | Electrical connector for portable multi-cell electrical energy storage device |
| CN108695448A (en) * | 2017-04-05 | 2018-10-23 | 广东广晟通信技术有限公司 | A kind of over-current protection structure of lithium battery module |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201365119Y (en) * | 2009-01-16 | 2009-12-16 | 东莞新能源科技有限公司 | Power battery protection device |
| US20100291426A1 (en) * | 2009-05-15 | 2010-11-18 | Sinoelectric Powertrain Corporation | Flexible fusible link, systems, and methods |
| US20120103930A1 (en) * | 2010-11-02 | 2012-05-03 | Sinoelectric Powertrain Corporation | Method of making fusible links |
| CN102916158A (en) * | 2011-08-05 | 2013-02-06 | 深圳市沃特玛电池有限公司 | Safety structure for power battery pack |
| CN203119024U (en) * | 2013-03-07 | 2013-08-07 | 华霆（合肥）动力技术有限公司 | External overcurrent protection device for lithium battery |
-
2013
- 2013-03-07 CN CN2013100725586A patent/CN103178236A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201365119Y (en) * | 2009-01-16 | 2009-12-16 | 东莞新能源科技有限公司 | Power battery protection device |
| US20100291426A1 (en) * | 2009-05-15 | 2010-11-18 | Sinoelectric Powertrain Corporation | Flexible fusible link, systems, and methods |
| US20120103930A1 (en) * | 2010-11-02 | 2012-05-03 | Sinoelectric Powertrain Corporation | Method of making fusible links |
| CN102916158A (en) * | 2011-08-05 | 2013-02-06 | 深圳市沃特玛电池有限公司 | Safety structure for power battery pack |
| CN203119024U (en) * | 2013-03-07 | 2013-08-07 | 华霆（合肥）动力技术有限公司 | External overcurrent protection device for lithium battery |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2018521446A (en) * | 2015-05-11 | 2018-08-02 | ゴゴロ インク | Electrical connector for portable multi-cell electrical energy storage device |
| US11165123B2 (en) | 2015-05-11 | 2021-11-02 | Gogoro Inc. | Electrical connector positioned in a battery pack |
| CN105702908A (en) * | 2016-01-20 | 2016-06-22 | 华霆（合肥）动力技术有限公司 | Multi-stage over-current protection device of lithium ion battery |
| CN105702908B (en) * | 2016-01-20 | 2018-10-19 | 华霆（合肥）动力技术有限公司 | A kind of lithium ion battery multistage overcurrent protective device |
| CN106450128A (en) * | 2016-10-18 | 2017-02-22 | 许继电源有限公司 | Battery group and electrode current piece thereof |
| CN106784567A (en) * | 2017-01-18 | 2017-05-31 | 华霆（合肥）动力技术有限公司 | Prevent the power supply and electric power system of battery thermal runaway |
| CN106784567B (en) * | 2017-01-18 | 2024-03-12 | 华霆（合肥）动力技术有限公司 | Power supply and power supply system for preventing battery thermal runaway |
| CN108695448A (en) * | 2017-04-05 | 2018-10-23 | 广东广晟通信技术有限公司 | A kind of over-current protection structure of lithium battery module |
| CN108695448B (en) * | 2017-04-05 | 2020-11-24 | 广东广晟通信技术有限公司 | Over-current protection structure of lithium battery module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5804540B2 (en) | Battery pack with improved safety | |
| KR101433199B1 (en) | Battery module and Busbar applied for battery module | |
| JP5372495B2 (en) | Secondary battery protection circuit and secondary battery having the same | |
| KR101370264B1 (en) | Soldering connector, and Battery module and Battery pack comprising the same | |
| US20140186667A1 (en) | Battery pack of improved safety | |
| CN105702908B (en) | A kind of lithium ion battery multistage overcurrent protective device | |
| CN103178236A (en) | Lithium battery external over-current protection device | |
| CN103000957A (en) | Chargeable electric bicycle lithium battery module with function of thermal runaway protection | |
| JP2008504665A (en) | Secondary battery having constant voltage element | |
| CN103985834B (en) | Based on the lithium battery module of expansion of metal formula memory switch protector | |
| CN203787945U (en) | Lithium ion battery protector | |
| CN203119024U (en) | External overcurrent protection device for lithium battery | |
| KR101608694B1 (en) | A Safeguard Apparatus Preventing Overcharge for A Secondary Battery | |
| CN107221629A (en) | Battery and mobile terminal | |
| JPH11339766A (en) | Battery pack | |
| CN104104068A (en) | Lithium ion battery protector | |
| CN107482140A (en) | A kind of battery cover board of external dual fail-safe protection device | |
| CN111181205A (en) | Parallel high-voltage control box of battery system | |
| CN201975450U (en) | Multi-parallel-connection multi-serial-connection lithium ion battery pack protecting device | |
| CN104241590B (en) | Accumulator list pond and for the method for accumulator list tank discharge | |
| CN203839453U (en) | Metal expansion type memory switch protector based lithium battery module | |
| CN201229970Y (en) | Charging lithium battery having heat stopping mechanism | |
| CN202260411U (en) | Protection plate special for iron phosphate lithium batteries | |
| CN205303593U (en) | Lithium cell structure for motorcycle | |
| CN101286555B (en) | Time-delay protective system for external short circuit positioned inside lithium ion cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130626 |