CN105098133A - Battery pack with short-circuit protection function - Google Patents
Battery pack with short-circuit protection function Download PDFInfo
- Publication number
- CN105098133A CN105098133A CN201510474013.7A CN201510474013A CN105098133A CN 105098133 A CN105098133 A CN 105098133A CN 201510474013 A CN201510474013 A CN 201510474013A CN 105098133 A CN105098133 A CN 105098133A
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- China
- Prior art keywords
- battery
- screening glass
- connection
- short
- battery pack
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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
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention discloses a battery pack with a short-circuit protection function. The battery pack comprises batteries and connection protecting sheets; the number of the batteries is at least two, and the batteries are in serial connection or in parallel connection through the connection protecting sheets; each battery is provided with a positive terminal and a negative terminal; each connection protecting sheet is provided with at least two lugs; the connection protecting sheet is connected with the positive terminal and the negative terminal through the lugs; and the connection protecting sheet is slotted between the lugs to form a narrowed conductive connection part capable of fusing in short circuit of the batteries. According to the battery pack, the connection protecting sheets are slotted in the current path in the section direction for being narrowed and shrunk; the slotted, narrowed and shrunk connection protecting sheets reduce the section area of the current path, namely, the overcurrent capability of the connection protecting sheets is reduced, however, the current-passing capability in normal use can be ensured, and meanwhile, the connection protecting sheet can be fused in time in encountering large current for realizing overcurrent and protection. The battery pack is simple in manufacturing process, and capable of improving the current-passing capability among the batteries, and the battery can be switched off in encountering higher current so as to avoid chain reactions.
Description
Technical field
The present invention is used for automobile power cell technical field, particularly relates to a kind of battery pack with short-circuit protection function.
Background technology
In prior art, battery stack battery bag, in order to obtain comparatively multi-energy, often need multiple battery to combine, relate to serial battery, parallel connection or series-parallel connection, a large amount of battery links together, and needs to be electrically connected.
Traditional technology has: in order to obtain good overcurrent or export energy or power, electrical connection between battery usually uses the good copper of conductivity or copper is zinc-plated or the metal material such as nickel, there is certain potential safety hazard in the electrical connection between this battery, once battery is short-circuited, battery is too large by electric current, between battery, also there is some difference, exceed the ability generation continuation short circuit that battery can be born, around battery needs to bear more multiple current, thus continue to be short-circuited, other batteries continue to bear more multiple current, continue chain-react, cause " avalanche effect " usually said.
The technology be relatively improved has: at the positive and negative electrode of each battery each series connection fuse, battery and fuse form assembly, and then the assembly of multiple such battery and fuse is carried out series, parallel or series-parallel connection, are made into power brick.Thus can reach by electric current, if when being short-circuited, also can disconnecting this battery in time, play safeguard protection effect.Play the effect of fuse.
But " traditional technology " exists very big potential safety hazard, if when a certain battery is punctured (or other modes cause internal short-circuit), external short circuit, other batteries continue chain-react, cause " snowslide ".Time slight, cause FCL battery short circuit to burn, time serious because continue, endlessly big current flow through most batteries, produce large calorimetric and gas, have little time discharge, may cause moment even instantaneous explosion on fire, bring more serious consequence.
" compare the technology be improved " although solve or partly solve this problem, in or beyond battery occurs during portion's short circuit, this battery can be disconnected in time, play the effect of fuse, there is following problem or difficult point in this technology:
1. the resistance ratio of fuse is higher, internal resistance 20m about the Ω of battery, but the resistance 7m Ω of fuse, account for 35% of battery, each battery will add 1 ~ 2 such fuse, and the power having a strong impact on battery plays, thus also has certain influence to energy performance.
2. fuse be various metals and other materials form meet material, can as parts a certain in power brick, but also need to be connected with other metallic conductors, material as connector is generally zinc-plated etc. the single metal material of metallic copper or copper, fuse and this bi-material of metallic conductor is wanted effectively to link together, there is great technical difficulty and need a lot of equipment investment fund, neither conventional, electric-resistance welding, achieved by laser welding, also there is some problems in reliability simultaneously.
3. the cost of fuse is not low yet, and particularly automobile power cell uses field, needs larger electric current environment for use, and the current capacity of total fuse carrying needs higher, and the cost of corresponding fuse also increases greatly.
Summary of the invention
For solving the problem, the invention provides a kind of battery pack with short-circuit protection function, its manufacture craft is simple, improves current capacity between battery, and can disconnect when electric current is higher thus avoid chain reaction.
The technical solution adopted for the present invention to solve the technical problems is: a kind of battery pack with short-circuit protection function; comprise battery and be connected screening glass; described battery at least arranges two pieces and passes through to connect screening glass serial or parallel connection; battery has positive terminal and negative terminal; described connection screening glass is provided with at least two ear seats; connect screening glass to be connected by the positive terminal of ear seat and battery or negative terminal, connection screening glass is slotted to be formed and is narrowed and the conductive connection part that can fuse when battery short circuit between ear seat.
Be further used as the improvement of technical solution of the present invention, described positive terminal column top, negative terminal column top all form the joint face installed and connect screening glass, and battery close-packed arrays also makes the joint face of positive terminal, negative terminal all in the same plane.
Be further used as the improvement of technical solution of the present invention; the joint face of described positive terminal and negative terminal is equipped with screw; the ear seat connecting screening glass is provided with through hole; connection screening glass passes through through described through hole and the bolted screwed in described screw is arranged on joint face, and described bolt is set with flat shim and spring shim outside connection screening glass.
Be further used as the improvement of technical solution of the present invention; the joint face of described positive terminal and negative terminal is equipped with screw; the ear seat connecting screening glass is provided with through hole, and connection screening glass passes through through described through hole and the flange bolt fastening screwed in described screw is arranged on joint face.
Be further used as the improvement of technical solution of the present invention, described connection screening glass adopts the sheet metal with uniform thickness shaping by shearing, punching press, Linear cut or laser cutting.
Be further used as the improvement of technical solution of the present invention, described connection screening glass be that silver, copper, aluminium, nickel, steel, copper are silver-plated, one in copper nickel plating.
Beneficial effect of the present invention: connection screening glass of the present invention slots to form the conductive connection part narrowed between ear seat, namely screening glass is being connected by the cross-wise direction of current path is slotted, narrow and reduce process, fluting, although narrow the sectional area that after reducing, minimizing electric current passes through, namely this sheet overcurrent capability is reduced, but electric current handling capacity when can ensure normal use, simultaneously, when running into special big current, namely when inside battery or short-circuited outside exception, this battery can be disconnected in time, play overcurrent and safety effect, chain reaction can not be caused, improve the fail safe of battery pack.Manufacture craft of the present invention is simple, improves current capacity between battery, and can disconnect when electric current is higher thus avoid chain reaction.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the connection screening glass structural representation that the present invention has two ear seats;
Fig. 2 is the connection screening glass tandem cell configuration schematic diagram that the present invention has two ear seats;
Fig. 3 is the connection screening glass batteries in parallel connection structural representation that the present invention has two ear seats;
Fig. 4 is the connection screening glass structural representation that the present invention has six ear seats;
Fig. 5 is the connection screening glass connection battery structure schematic diagram that the present invention has six ear seats.
Embodiment
Referring to figs. 1 through Fig. 5, that show the concrete structure of the preferred embodiment of the present invention.To the design feature of the present invention each element be described in detail below, and if be described to direction (upper and lower, left and right, before and after) time, be with the structure shown in Fig. 2 for reference to describing, but actual user of the present invention is to being not limited thereto.
The invention provides a kind of battery pack with short-circuit protection function, comprise battery 1 and be connected screening glass 2, described connection screening glass 2 is that silver, copper, aluminium, nickel, steel, copper are silver-plated, one in copper nickel plating.Described battery 1 at least arranges two pieces and by connecting screening glass 2 serial or parallel connection, battery 1 has positive terminal and negative terminal, and time in parallel, positive terminal is connected with negative terminal with positive terminal, negative terminal; During series connection; positive terminal is connected with negative terminal; ensure electric current normal through; described connection screening glass 2 is provided with two or six ear seats 21; connect screening glass 2 to be connected by the positive terminal of ear seat 21 and battery 1 or negative terminal; connection screening glass 2 is slotted to be formed and is narrowed and the conductive connection part 22 that can fuse when battery short circuit between ear seat 21; conductive connection part 22 is good conductors of electricity; resistance is smaller; actual measurement below 0.1m Ω; relatively and internal resistance of cell 2-20m Ω size, negligible.During multiple battery combination, ensure that normal power-up stream uses, be conducive to overcurrent; When battery is short-circuited, this battery can be disconnected in time, play similar action of fuse.
Wherein, described positive terminal column top, negative terminal column top all form the joint face installed and connect screening glass; battery 1 close-packed arrays also makes the joint face of positive terminal, negative terminal all in the same plane; the joint face of described positive terminal and negative terminal is equipped with screw 11; the ear seat 21 connecting screening glass 2 is provided with through hole 23; connection screening glass 2 passes through through described through hole 23 and the bolted screwed in described screw 11 is arranged on joint face, and described bolt is set with flat shim and spring shim outside connection screening glass 2.Certainly, the flange bolt 3 of connection screening glass 2 also by passing described through hole 23 is fastening is arranged in described screw 11.Connect screening glass 2 also by screwing in that flange bolt 3 in described screw 11 is fastening to be arranged on joint face through described through hole 23.
Described connection screening glass 2 adopts the sheet metal with uniform thickness shaping by shearing, punching press, Linear cut or laser cutting, is convenient to manufacture.
Use material 1070 aluminum to slot in the present embodiment, narrow conduction connection screening glass; the conductive connection part 22 that mode of grooving obtains specially makes adding man-hour; but this place's cross section design to ensure that normal current passes through; in automobile power cell group technology, this sectional area does different designs according to the different metal material of use.
For 37V-14Ah battery overcurrent 2C, i.e. 28A electric current handling capacity design, this place's cross-sectional area is designed to 28A/7A/mm
2=4mm
2, this patent is implemented to use 100mm thickness aluminium sheet, and so width is 4mm
2/ 100mm=400mm, therefore fluting place width design is 400mm.
During normal use, electric current is less than 50A, this fluting or narrow conduction to connect screening glass 2 surface temperature lower, and in fact, can continue the long period, because the good conductivity of aluminium, resistance is low, generates heat smaller, therefore, can ensure normally use.
During this battery pack external short circuit, connect screening glass 2 size of current 650-700A, only maintain a 1-2S and namely to have fused this connection screening glass, battery dialysis open circuit, thus make this battery pack keep short-circuit condition, reach the object protecting battery and battery pack.
Certainly, the invention is not limited to above-mentioned execution mode, those of ordinary skill in the art also can make equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (6)
1. one kind has the battery pack of short-circuit protection function; it is characterized in that: comprise battery and be connected screening glass; described battery at least arranges two pieces and passes through to connect screening glass serial or parallel connection; battery has positive terminal and negative terminal; described connection screening glass is provided with at least two ear seats; connect screening glass to be connected by the positive terminal of ear seat and battery or negative terminal, connection screening glass is slotted to be formed and is narrowed and the conductive connection part that can fuse when battery short circuit between ear seat.
2. the battery pack with short-circuit protection function according to claim 1; it is characterized in that: described positive terminal column top, negative terminal column top all form the joint face installed and connect screening glass, and battery close-packed arrays also makes the joint face of positive terminal, negative terminal all in the same plane.
3. the battery pack with short-circuit protection function according to claim 2; it is characterized in that: the joint face of described positive terminal and negative terminal is equipped with screw; the ear seat connecting screening glass is provided with through hole; connection screening glass passes through through described through hole and the bolted screwed in described screw is arranged on joint face, and described bolt is set with flat shim and spring shim outside connection screening glass.
4. the battery pack with short-circuit protection function according to claim 2; it is characterized in that: the joint face of described positive terminal and negative terminal is equipped with screw; the ear seat connecting screening glass is provided with through hole, and connection screening glass passes through through described through hole and the flange bolt fastening screwed in described screw is arranged on joint face.
5. the battery pack with short-circuit protection function according to any one of Claims 1 to 4, is characterized in that: described connection screening glass adopts the sheet metal with uniform thickness shaping by shearing, punching press, Linear cut or laser cutting.
6. the battery pack with short-circuit protection function according to claim 5, is characterized in that: described connection screening glass is that silver, copper, aluminium, nickel, steel, copper are silver-plated, one in copper nickel plating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510474013.7A CN105098133A (en) | 2015-08-05 | 2015-08-05 | Battery pack with short-circuit protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510474013.7A CN105098133A (en) | 2015-08-05 | 2015-08-05 | Battery pack with short-circuit protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105098133A true CN105098133A (en) | 2015-11-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510474013.7A Pending CN105098133A (en) | 2015-08-05 | 2015-08-05 | Battery pack with short-circuit protection function |
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| Country | Link |
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| CN (1) | CN105098133A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579195A (en) * | 2017-08-21 | 2018-01-12 | 广州市云通磁电股份有限公司 | Beam type power battery and its assemble method |
| CN107871841A (en) * | 2017-10-19 | 2018-04-03 | 长沙锂安能电子科技有限公司 | A kind of built-in difunctional protection device and battery for battery |
| CN112366429A (en) * | 2020-10-29 | 2021-02-12 | 新盛力科技股份有限公司 | Conductive metal sheet |
| CN112701425A (en) * | 2019-10-21 | 2021-04-23 | 宝马股份公司 | Battery cell contact device and electric storage device |
Citations (8)
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| JP2009252567A (en) * | 2008-04-08 | 2009-10-29 | Nissei Kogyo Yugenkoshi | Battery pack |
| CN201466084U (en) * | 2009-07-28 | 2010-05-12 | 河北敬众锂电源科技有限公司 | Lithium-ion power battery connecting piece |
| CN201927667U (en) * | 2010-12-23 | 2011-08-10 | 珠海金峰航电源科技有限公司 | Novel battery pack with insurance function |
| CN201946695U (en) * | 2010-12-10 | 2011-08-24 | 深圳浩远电池材料有限公司 | Novel battery pack with insurance function |
| CN102769120A (en) * | 2012-07-24 | 2012-11-07 | 深圳市雄韬电源科技股份有限公司 | Battery pack connecting device, battery system and electric equipment |
| CN103137939A (en) * | 2011-11-30 | 2013-06-05 | 现代自动车株式会社 | Safety structure for high voltage battery of vehicle |
| US20150050531A1 (en) * | 2012-03-05 | 2015-02-19 | Husqvarna Ab | Battery cell connector |
| CN204946998U (en) * | 2015-08-05 | 2016-01-06 | 广州力柏能源科技有限公司 | A kind of battery pack with short-circuit protection function |
-
2015
- 2015-08-05 CN CN201510474013.7A patent/CN105098133A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009252567A (en) * | 2008-04-08 | 2009-10-29 | Nissei Kogyo Yugenkoshi | Battery pack |
| CN201466084U (en) * | 2009-07-28 | 2010-05-12 | 河北敬众锂电源科技有限公司 | Lithium-ion power battery connecting piece |
| CN201946695U (en) * | 2010-12-10 | 2011-08-24 | 深圳浩远电池材料有限公司 | Novel battery pack with insurance function |
| CN201927667U (en) * | 2010-12-23 | 2011-08-10 | 珠海金峰航电源科技有限公司 | Novel battery pack with insurance function |
| CN103137939A (en) * | 2011-11-30 | 2013-06-05 | 现代自动车株式会社 | Safety structure for high voltage battery of vehicle |
| US20150050531A1 (en) * | 2012-03-05 | 2015-02-19 | Husqvarna Ab | Battery cell connector |
| CN102769120A (en) * | 2012-07-24 | 2012-11-07 | 深圳市雄韬电源科技股份有限公司 | Battery pack connecting device, battery system and electric equipment |
| CN204946998U (en) * | 2015-08-05 | 2016-01-06 | 广州力柏能源科技有限公司 | A kind of battery pack with short-circuit protection function |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107579195A (en) * | 2017-08-21 | 2018-01-12 | 广州市云通磁电股份有限公司 | Beam type power battery and its assemble method |
| CN107871841A (en) * | 2017-10-19 | 2018-04-03 | 长沙锂安能电子科技有限公司 | A kind of built-in difunctional protection device and battery for battery |
| CN112701425A (en) * | 2019-10-21 | 2021-04-23 | 宝马股份公司 | Battery cell contact device and electric storage device |
| CN112701425B (en) * | 2019-10-21 | 2023-07-28 | 宝马股份公司 | Battery cell contact-on device and accumulator |
| CN112366429A (en) * | 2020-10-29 | 2021-02-12 | 新盛力科技股份有限公司 | Conductive metal sheet |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151125 |