CN202839813U - Lithium ion battery pack with over-current protection function - Google Patents
Lithium ion battery pack with over-current protection function Download PDFInfo
- Publication number
- CN202839813U CN202839813U CN2012204600241U CN201220460024U CN202839813U CN 202839813 U CN202839813 U CN 202839813U CN 2012204600241 U CN2012204600241 U CN 2012204600241U CN 201220460024 U CN201220460024 U CN 201220460024U CN 202839813 U CN202839813 U CN 202839813U
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- Prior art keywords
- lithium
- lithium ion
- ion battery
- jumper
- battery group
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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 discloses a lithium ion battery pack with an over-current protection function. The lithium ion battery pack comprises a plurality of lithium ion cells connected in series or in parallel. The neighboring lithium ion cells bearing maximum current in a connection circuit of the lithium ion battery pack are connected in series through current limiting strips, and the other lithium ion cells are connected in series or in parallel through connection strips. The lithium ion battery pack can effectively solve the problem that a lithium ion battery pack is poor in safe reliability, the current limiting strips are used for achieving the current limiting protection function of the lithium ion battery pack, and therefore major accidents can be avoided.
Description
Technical field
The utility model relates to a kind of lithium ion battery group, refers in particular to a kind of lithium ion battery group with overcurrent self-protection function, belongs to the lithium-ion battery systems field.
Background technology
At present, lithium ion battery is owing to have higher operating voltage and energy density, have again simultaneously the characteristics such as pollution-free and environmental friendliness and by extensive concern and use, and progressively begun broad development in fields such as electric bicycle, electric automobile, energy storage and use.The fail safe of lithium ion battery is one of people's outline, has carried out a large amount of research work for the fail safe of lithium ion battery at present, and it is dangerous that trial can reduce the use of lithium ion battery.
In the prior art, the lithium ion battery group is mainly connected to form by jumper, nut and hardware control unit (LECU) by some lithium-ion electric cores.At present for the fail safe of lithium ion battery group, the researcher has attempted controlling from external circuit and power-supply management system (BMS), when electric current is excessive so that the relay auto-breaking.
But; thereby present employed relay sticks together easily and loses defencive function; then just be in the starting stage of research and development for BMS; reliability also needs the checking of longer time; if so when the power-supply management system of lithium ion battery group and relay break down, just can't play the effect of protection current limliting.
The utility model content
The purpose of this utility model provides a kind of lithium ion battery group with excess current protective function; can effectively solve the not high problem of lithium ion battery group security reliability; by adopting the current limliting jumper to realize the current-limiting protection function of lithium ion battery group, avoid causing a serious accident.
For achieving the above object, the technical solution of the utility model provides a kind of lithium ion battery group with excess current protective function, and it comprises by some lithium-ion electric cores connected in series or in parallel; Bear in the link circuit of described lithium ion battery group between the adjacent lithium-ion electric core of maximum current and be connected in series by the current limliting jumper; Pass through to connect the jumper serial or parallel connection between described other lithium-ion electric cores.
Described current limliting jumper is by some copper sheet stacked compositions, and the thickness of every copper sheet is 0.1～0.5mm.
The curved projection of the mid portion of described current limliting jumper, and some copper sheet layerings arrange.
Some copper sheet weldings of the two side portions of described current limliting jumper form one.
Two side portions at described current limliting jumper offers some connecting holes, this current limliting jumper is connected the electrode of adjacent lithium-ion electric core, and pad and shell fragment are set, and is fixedly connected with by nut.
Described lithium-ion electric core adopts quadrate lithium battery.
Described connection jumper connects the electrode of adjacent lithium-ion electric core, and pad and shell fragment are set, and is fixedly connected with by nut.
In sum; lithium ion battery group with excess current protective function provided by the utility model; can effectively solve lithium ion battery group in the prior art and use the not high problem of security reliability of power-supply management system and relay protection; by adopting the current limliting jumper to limit maximum current in the whole battery pack link circuit; thereby guarantee the safety of lithium ion battery group, prevent from causing the major disaster accident.
Description of drawings
Fig. 1 is the side diagram of the current limliting jumper in the utility model;
Fig. 2 is the vertical view of the current limliting jumper in the utility model;
Fig. 3 is the structural representation of a kind of embodiment of the lithium ion battery group with excess current protective function in the utility model;
Fig. 4 is the structural representation of the another kind of embodiment of the lithium ion battery group with excess current protective function in the utility model.
Embodiment
Below in conjunction with Fig. 1～Fig. 4, describe a preferred embodiment of the present utility model in detail.
Lithium ion battery group with excess current protective function provided by the utility model, it comprises by some lithium-ion electric cores connected in series or in parallel; Bear in the link circuit of described lithium ion battery group between the adjacent lithium-ion electric core of maximum current and be connected in series by the current limliting jumper, thereby the maximum current in the restriction link circuit plays a protective role; Pass through to connect the jumper serial or parallel connection between described other lithium-ion electric cores.
As depicted in figs. 1 and 2, described current limliting jumper 1 is by 11 stacked compositions of some copper sheets, and the thickness of every copper sheet is 0.1～0.5mm.The curved projection of the mid portion of described current limliting jumper 1, and the 11 layering settings of some copper sheets.Some copper sheets 11 weldings of the two side portions of described current limliting jumper 1 form one.Two side portions at described current limliting jumper 1 offers some connecting holes 12, this current limliting jumper 1 is connected the electrode of adjacent lithium-ion electric core, and pad and shell fragment are set, and is fixedly connected with by nut.
Lowest high-current value according to every layer of copper sheet 11 of described current limliting jumper 1 can bear can calculate the lowest high-current value that whole current limliting jumper 1 can bear.Therefore, can by regulating the number of plies of the copper sheet 11 of processing current limliting jumper 1, can prepare the current limliting jumper 1 of different size, thereby guarantee the fail safe of the lithium ion battery group of various different sizes.
Described lithium-ion electric core adopts quadrate lithium battery.
Described connection jumper connects the electrode of adjacent lithium-ion electric core, and pad and shell fragment are set, and is fixedly connected with by nut.
As shown in Figure 3, be the structural representation of a kind of embodiment of the lithium ion battery group with excess current protective function provided by the utility model.In the present embodiment, described lithium ion battery group is the quadrate lithium battery group, and it is composed in series by jumper as battery core successively by six quadrate lithium batteries 5.The positive pole 4 of the first quadrate lithium battery 5 in this square lithium battery group connects the positive pole 2 of whole quadrate lithium battery group; The negative pole 3 of the tail end quadrate lithium battery 5 in this square lithium battery group connects the negative pole 6 of whole quadrate lithium battery group.Be connected in series by current limliting jumper 1 between the negative pole of the first quadrate lithium battery 5 in this square lithium battery group and the positive pole of second quadrate lithium battery 5, and pad and shell fragment be set, be fixedly connected with by nut, in order to the maximum current in the link circuit that limits the quadrate lithium battery group.Be connected in series by connecting jumper 7 between described other each adjacent quadrate lithium battery 5.
Because then being the performance by battery core (being quadrate lithium battery 5), the maximum withstand current of described quadrate lithium battery group determined.Therefore, the number of plies of the copper sheet 11 of medial arc bossing that can be by regulating current limliting jumper 1 is regulated the lowest high-current value that can bear of described current limliting jumper 1.When the quadrate lithium battery group worked, the electric current in the whole link circuit was less than the maximum withstand current of current limliting jumper 1, and this moment, the quadrate lithium battery group worked.When the quadrate lithium battery group because when electric current is excessive in the link circuit that external short circuit or other reasons cause; because current value surpasses the maximum bearing ability of described current limliting jumper 1; therefore current limliting jumper 1 can fuse; thereby so that the disconnection of the link circuit of quadrate lithium battery group, thereby play the function of protecting the quadrate lithium battery group.
As shown in Figure 4, be the structural representation of the another kind of embodiment of the lithium ion battery group with excess current protective function provided by the utility model.In the present embodiment, described lithium ion battery group is the quadrate lithium battery group, and it is connected to form by jumper as battery core by eight quadrate lithium batteries 5; Wherein per two quadrate lithium batteries 5 form the lithium-ion electric core group by being connected in parallel first, and then the lithium-ion electric core group of four groups of parallel connections forms the quadrate lithium battery group by series connection.The positive pole 4 of the first lithium-ion electric core group in this square lithium battery group connects the positive pole 2 of whole quadrate lithium battery group; The negative pole 3 of the tail end lithium-ion electric core group in this square lithium battery group connects the negative pole 6 of whole quadrate lithium battery group.Be connected in series by current limliting jumper 1 between the negative pole of the first lithium-ion electric core group in this square lithium battery group and the positive pole of second lithium-ion electric core group, and pad and shell fragment be set, be fixedly connected with by nut, in order to the maximum current in the link circuit that limits the quadrate lithium battery group.Be connected in series by connecting jumper 7 between described other each adjacent lithium-ion electric core group.
Same as above, the number of plies of the copper sheet 11 of the medial arc bossing by regulating current limliting jumper 1 is regulated the lowest high-current value that can bear of described current limliting jumper 1, namely the maximum withstand current value of quadrate lithium battery group.When the quadrate lithium battery group worked, the electric current in the whole link circuit was less than the maximum withstand current of current limliting jumper 1, and this moment, the quadrate lithium battery group worked.When the quadrate lithium battery group because when electric current is excessive in the link circuit that external short circuit or other reasons cause; because current value surpasses the maximum bearing ability of described current limliting jumper 1; therefore current limliting jumper 1 can fuse; thereby so that the disconnection of the link circuit of quadrate lithium battery group, thereby play the function of protecting the quadrate lithium battery group.
In sum; lithium ion battery group with excess current protective function provided by the utility model; can effectively solve lithium ion battery group in the prior art and use the not high problem of security reliability of power-supply management system and relay protection; by adopting the current limliting jumper to limit maximum current in the whole battery pack link circuit; thereby guarantee the safety of lithium ion battery group, prevent from causing the major disaster accident.
Although content of the present utility model has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to restriction of the present utility model.After those skilled in the art have read foregoing, for multiple modification of the present utility model with to substitute all will be apparent.Therefore, protection range of the present utility model should be limited to the appended claims.
Claims (7)
1. the lithium ion battery group with excess current protective function comprises by some lithium-ion electric cores connected in series or in parallel; It is characterized in that,
Bear in the link circuit of described lithium ion battery group between the adjacent lithium-ion electric core of maximum current and be connected in series by the current limliting jumper;
Pass through to connect the jumper serial or parallel connection between described other lithium-ion electric cores.
2. the lithium ion battery group with excess current protective function as claimed in claim 1 is characterized in that, described current limliting jumper is by some copper sheet stacked compositions, and the thickness of every copper sheet is 0.1～0.5mm.
3. the lithium ion battery group with excess current protective function as claimed in claim 2 is characterized in that, the curved projection of the mid portion of described current limliting jumper, and some copper sheet layerings arrange.
4. the lithium ion battery group with excess current protective function as claimed in claim 3 is characterized in that, some copper sheet weldings of the two side portions of described current limliting jumper form one.
5. the lithium ion battery group with excess current protective function as claimed in claim 4; it is characterized in that; two side portions at described current limliting jumper offers some connecting holes; the electrode that this current limliting jumper is connected adjacent lithium-ion electric core; and pad and shell fragment are set, be fixedly connected with by nut.
6. the lithium ion battery group with excess current protective function as claimed in claim 1 is characterized in that, described lithium-ion electric core adopts quadrate lithium battery.
7. the lithium ion battery group with excess current protective function as claimed in claim 1 is characterized in that described connection jumper connects the electrode of adjacent lithium-ion electric core, and pad and shell fragment is set, and is fixedly connected with by nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204600241U CN202839813U (en) | 2012-09-11 | 2012-09-11 | Lithium ion battery pack with over-current protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012204600241U CN202839813U (en) | 2012-09-11 | 2012-09-11 | Lithium ion battery pack with over-current protection function |
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| Publication Number | Publication Date |
|---|---|
| CN202839813U true CN202839813U (en) | 2013-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012204600241U Expired - Fee Related CN202839813U (en) | 2012-09-11 | 2012-09-11 | Lithium ion battery pack with over-current protection function |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594750A (en) * | 2013-11-22 | 2014-02-19 | 上海航天电源技术有限责任公司 | Floating charge resistant lithium ion battery module and floating charge method thereof |
| CN105552286A (en) * | 2015-12-14 | 2016-05-04 | 上海动力储能电池系统工程技术有限公司 | Current sharing structure for high-capacity lithium-ion battery system |
| CN105591065A (en) * | 2014-10-21 | 2016-05-18 | 王怀云 | Current-limiting electric-conductive sheet having overcurrent protection and apparatus based on same for quick connection between batteries |
| WO2018192071A1 (en) * | 2017-04-17 | 2018-10-25 | 安普能源科技有限公司 | Lithium battery module connection structure having self-protection function, and connection method |
| CN114188196A (en) * | 2021-11-26 | 2022-03-15 | 星恒电源股份有限公司 | Pulling force current-limiting protector and lithium battery module |
-
2012
- 2012-09-11 CN CN2012204600241U patent/CN202839813U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103594750A (en) * | 2013-11-22 | 2014-02-19 | 上海航天电源技术有限责任公司 | Floating charge resistant lithium ion battery module and floating charge method thereof |
| CN103594750B (en) * | 2013-11-22 | 2016-03-02 | 上海航天电源技术有限责任公司 | A kind of lithium ionic cell module of resistance to floating charge and floating charge method thereof |
| CN105591065A (en) * | 2014-10-21 | 2016-05-18 | 王怀云 | Current-limiting electric-conductive sheet having overcurrent protection and apparatus based on same for quick connection between batteries |
| CN105552286A (en) * | 2015-12-14 | 2016-05-04 | 上海动力储能电池系统工程技术有限公司 | Current sharing structure for high-capacity lithium-ion battery system |
| CN105552286B (en) * | 2015-12-14 | 2018-11-23 | 上海动力储能电池系统工程技术有限公司 | A kind of current equalizing structure of high capacity lithium ion battery system |
| WO2018192071A1 (en) * | 2017-04-17 | 2018-10-25 | 安普能源科技有限公司 | Lithium battery module connection structure having self-protection function, and connection method |
| CN114188196A (en) * | 2021-11-26 | 2022-03-15 | 星恒电源股份有限公司 | Pulling force current-limiting protector and lithium battery module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20200911 |