CN213816367U - Prevent short circuit utmost point ear and electric core - Google Patents
Prevent short circuit utmost point ear and electric core Download PDFInfo
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- CN213816367U CN213816367U CN202022954226.9U CN202022954226U CN213816367U CN 213816367 U CN213816367 U CN 213816367U CN 202022954226 U CN202022954226 U CN 202022954226U CN 213816367 U CN213816367 U CN 213816367U
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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 relates to a battery technology field discloses a prevent short circuit utmost point ear and electric core. The short-circuit-proof tab comprises a metal band and a tab glue, wherein the metal band comprises a welding section, a hot melting section and an outer leakage section which are sequentially connected; the welding section is positioned in the battery cell and used for welding with an electrode of the battery cell, and the leakage section is positioned outside the battery cell; the tab glue is adhered between the welding section and the hot melting section or between the hot melting section and the outer leakage section, and the cross sectional area of the hot melting section is smaller than that of the welding section and the outer leakage section. This prevent short circuit utmost point ear can fuse rapidly after electric core short circuit, forces to stop electric core short circuit, avoids electric core to catch a fire and explode. The battery cell comprises the short-circuit-proof tab, so that the safety is high, and the battery cell is not easy to ignite and explode.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a prevent short circuit utmost point ear and electric core.
Background
Lithium ion battery short circuit is a common safety risk item, and in the certification standard of battery production, testing the short circuit condition of the battery is particularly important for evaluating the safe use of the battery. Once the external short circuit occurs to the battery, a large instantaneous current is generated, so that the temperature of the battery rises suddenly, liquid leakage occurs, the danger such as fire is easily caused, and serious damage to the human body, property and the like can be caused in the serious case. At present, the problem of short circuit of a battery cell is solved, firstly, the short circuit of the battery cell is not exploded or ignited by optimizing a formula or optimizing an internal structure, but the protection effect is limited; secondly, through set up fusing area on utmost point ear and thus can stop the short circuit by fast fusing when making the short circuit, nevertheless because fusing area sets up unreasonablely, when probably leading to fusing area not reach fusing temperature yet, the electric core burnt out on fire.
SUMMERY OF THE UTILITY MODEL
Based on it is above, an object of the utility model is to provide a prevent short circuit utmost point ear and electric core, should prevent that short circuit utmost point ear can fuse rapidly after electric core short circuit, force to stop electric core short circuit, avoid electric core to catch fire and explosion, improve electric core security.
In order to achieve the purpose, the utility model adopts the following technical proposal:
an anti-short tab comprising:
the metal band comprises a welding section, a hot melting section and an outer leakage section which are sequentially connected, wherein the welding section is positioned inside the battery cell and used for welding with an electrode of the battery cell, and the outer leakage section is positioned outside the battery cell;
the tab glue is pasted between the welding section and the hot melting section or between the hot melting section and the outer leakage section; the cross section area of the hot melting section is smaller than that of the welding section and that of the outer leakage section.
As a preferred scheme of preventing short circuit utmost point ear, still include:
and the insulating section penetrates through the shell of the battery cell, the insulating section is connected between the welding section and the hot melting section or between the hot melting section and the outer leakage section, and the pole lugs are adhered to two surfaces of the insulating section.
As a preferred scheme for preventing the short circuit pole lug, the width of the welding section, the outer leakage section and the insulation section ranges from 1.5mm to 7 mm.
As a preferred scheme of the short-circuit prevention tab, when the tab glue is pasted between the welding section and the hot melting section, the length of the hot melting section is less than 4 mm.
As a preferred scheme of the short-circuit prevention pole lug, when the pole lug glue is pasted between the hot melting section (13) and the outer leakage section, the length of the hot melting section is not more than 2 mm.
As a preferable scheme of the short-circuit prevention tab, the width of the welding section and the width of the outer leakage section are equal, and the width of the heat fusing section ranges from 1/3 to 1/2 of the width of the welding section.
As a preferable scheme of the short-circuit prevention pole lug, the width of the hot melting section is 1mm, 1.5mm, 2mm, 2.5mm, 3mm or 3.5 mm.
As a preferable scheme of the short-circuit prevention pole lug, the thickness of the metal belt is 0.04mm-0.1 mm.
As a preferable scheme of the short-circuit prevention tab, the metal belt is an aluminum belt.
An electric core, includes the short circuit prevention utmost point ear of any above-mentioned technical scheme.
The utility model has the advantages that:
the utility model provides a prevent short circuit utmost point ear, glue including strap and utmost point ear, wherein the strap is including welding section, hot melt section and the outer section that leaks that connects gradually, and the welding section is located the inside of electric core and is used for the electrode welding with electric core, and the outer section that leaks is located the outside of electric core, and utmost point ear glue is pasted between welding section and hot melt section or hot melt section and the outer section that leaks between, and the cross-sectional area of hot melt section is less than the cross-sectional area of welding section and outer hourglass. Because the temperature near the tab glue is highest, the hot melting section with the minimum cross section area is arranged near the tab glue, when the battery cell is in short circuit, the current is overlarge, the temperature of the metal belt is rapidly increased, and the hot melting section with the minimum cross section area is most easily fused at the moment, so that the short circuit of the battery cell is stopped, and the phenomenon that the battery cell is ignited and exploded due to the fact that the battery cell is continuously in short circuit is avoided.
The utility model also provides an electric core, including foretell short circuit prevention utmost point ear, during the electric core short circuit, utmost point ear fuses fast to make electric core terminate the short circuit, avoid catching fire and explosion, improve electric core safety in utilization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a hot-melting section of a short-circuit prevention tab provided in an embodiment of the present invention, the hot-melting section being located outside a battery cell;
fig. 2 is a schematic structural diagram of the embodiment of the present invention, which provides a hot-melting section of a short-circuit prevention tab inside an electrical core.
In the figure:
1-a metal strip; 11-a welding section; 12-an outer leakage section; 13-hot melting section;
2-pole ear.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
As shown in fig. 1 and fig. 2, this embodiment provides a short-circuit prevention tab, including a metal strap 1 and a tab glue 2, where the metal strap 1 includes a welding section 11, a hot-melting section 13, and an outer leakage section 12 that are connected in sequence, the welding section 11 is located inside the battery cell and is used for welding with an electrode of the battery cell, the outer leakage section 12 is located outside the battery cell, the tab glue 2 is pasted between the welding section 11 and the hot-melting section 13 or between the hot-melting section 13 and the outer leakage section 12, and a cross-sectional area of the hot-melting section 13 is smaller than cross-sectional areas of the welding section 11 and the outer leakage section 12.
During the electric core short circuit, the utmost point ear upper temperature highest point that actual measurement arrived is located utmost point ear and glues near 2, sets up the less hot melt section 13 of cross sectional area near utmost point ear is glued 2, and when the electric core short circuit, the electric current is too big, and the strap 1 temperature is heated up rapidly, and the minimum place of cross sectional area fuses most easily this moment to terminate the electric core short circuit, avoided electric core to continue the short circuit to lead to electric core to catch fire and explode.
When the battery cell is in short circuit, the temperature is highest at the position of 0-4mm outside the tab glue 2, so that when the hot melting section 13 is positioned outside the battery cell, the length of the hot melting section 13 is not more than 4 mm. In order to avoid the rupture of the hot melting section 13 with a smaller cross section area by the external environment of the battery cell, the hot melting section 13 can be arranged inside the battery cell, and the length of the hot melting section 13 is not more than 2mm due to the space limitation inside the battery cell, so that the influence on the internal structure of the battery cell is avoided. Of course, in other embodiments, the length of the heat-fusible section 13 may be designed according to the cell space and the actual requirement.
Specifically, the short-circuit prevention tab further comprises an insulation section connected between the welding section 11 and the hot melting section 13 or between the hot melting section 13 and the outer leakage section 12, and more specifically, when the hot melting section 13 is arranged outside the battery cell, the insulation section is connected between the welding section 11 and the hot melting section 13; when the heat-melting section 13 is arranged inside the battery cell, the insulating section is connected between the heat-melting section 13 and the outer leakage section 12. The insulating section runs through in the casing of electric core, and utmost point ear glue 2 pastes in the both sides of insulating section. Preferably, the tab compound 2 completely covers the insulation segment. Alternatively, the tab glue 2 may be black glue or white glue.
In this embodiment, the opposite both sides limit of strap 1 interlude is provided with the recess, forms hot melt section 13 for the width of hot melt section 13 is compared in other positions of strap 1 and is narrowed, thereby makes the resistance grow of hot melt section 13, and when electric core short circuit, the electric current is too big, and hot melt section 13 blows more easily, in order to terminate the electric core short circuit. The widths of other parts of the metal strip 1 are unchanged, namely the widths of the welding section 11, the insulating section and the outer leakage section 12 are unchanged, so that the requirements of tab 2 welding on the width of the metal strip 1 and the requirements of battery pack processing welding on the width of the metal strip 1 are not influenced. Optionally, the groove may be rectangular, or may be in any other shape, such as an arc shape or an irregular shape, and details thereof are not repeated here.
Preferably, the metal strip 1 is made of aluminum. In the lithium ion battery, the positive tab is made of aluminum, the negative tab is made of nickel, the melting point of nickel metal is 1453 ℃, the melting point of aluminum metal is 660 ℃, and obviously, the positive tab is easier to blow at the same temperature; and when the electrode lugs made of the same material are narrowed and thinned, the temperature required by fusing is also reduced. Therefore, the heat-fusible section 13 is provided on the positive tab, i.e., the cross-sectional area of a certain section of the metal strip 1 of the positive tab is reduced. When the current is too large, the melting point of the positive tab is lower, the resistance at the position with the smaller cross section area is the largest, the required fusing temperature is also smaller, and the hot melting section 13 is positioned near the tab glue 2, so that the temperature of the hot melting section 13 is the highest, and in sum, the hot melting section 13 can be fused at the fastest speed, and the purposes of terminating short circuit and protecting the battery cell are achieved.
Preferably, the thickness of the metal strip 1 is 0.04mm-0.1mm, and the specific value needs to be selected according to actual requirements.
Further, the width of the metal strip 1 except the hot-melting section 13 ranges from 1.5mm to 7mm, and the width of the hot-melting section 13 ranges from 1/3 to 1/2 of the width of the part. Alternatively, the width of the heat-melting section 13 may be 1mm, 1.5mm, 2mm, 2.5mm, 3mm or 3.5mm, according to the cell capacity and the width of the tab itself.
The short circuit prevention tab provided by the embodiment utilizes the characteristic that the temperature near the tab adhesive 2 is higher, and the hot melting section 13 with the smaller cross sectional area is reasonably arranged on the tab, so that when the short circuit occurs to the battery cell, the tab can be fused at the fastest speed, the tab 2 is prevented from not being fused, and the battery cell is subjected to the condition of firing.
The embodiment also provides a battery cell, which comprises the short-circuit-proof tab. When the short circuit occurs in the battery cell, the hot melting section 13 of the short circuit prevention lug is quickly blown, so that the short circuit is stopped and continued, the battery cell is prevented from exploding and firing, and the safety of the battery cell is enhanced.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. An anti-short tab, comprising:
the metal band (1) comprises a welding section (11), a hot melting section (13) and an outer leakage section (12) which are sequentially connected, wherein the welding section (11) is positioned inside the battery cell and used for being welded with an electrode of the battery cell, and the outer leakage section (12) is positioned outside the battery cell;
the tab glue (2) is pasted between the welding section (11) and the hot melting section (13) or between the hot melting section (13) and the outer leakage section (12); the cross-sectional area of the hot melting section (13) is smaller than that of the welding section (11) and the outer leakage section (12).
2. The short circuit prevention tab as claimed in claim 1, further comprising:
the insulating section runs through the shell of the battery cell, the insulating section is connected between the welding section (11) and the hot melting section (13) or between the hot melting section (13) and the outer leakage section (12), and the tab glue (2) is bonded on two sides of the insulating section.
3. The short-circuit prevention tab as claimed in claim 2, wherein the widths of the welding section (11), the outer leakage section (12) and the insulation section range from 1.5mm to 7 mm.
4. The short-circuit prevention tab as claimed in claim 1, wherein the length of the heat-fusible section (13) is less than 4mm when the tab compound (2) is adhered between the welding section (11) and the heat-fusible section (13).
5. The short-circuit prevention tab as claimed in claim 1, wherein the length of the heat-fusing section (13) is not more than 2mm when the tab compound (2) is stuck between the heat-fusing section (13) and the outer leakage section (12).
6. The short-circuit prevention tab as claimed in claim 1, wherein the welded segment (11) and the outer leakage segment (12) have equal widths, and the width of the heat-fusing segment (13) ranges from 1/3 to 1/2 of the width of the welded segment (11).
7. The short-circuit prevention tab as claimed in claim 1, wherein the width of the heat-fusible section (13) is 1mm, 1.5mm, 2mm, 2.5mm, 3mm or 3.5 mm.
8. The short-circuit prevention tab as claimed in claim 1, wherein the metal strip (1) has a thickness of 0.04mm to 0.1 mm.
9. The short-circuit prevention tab as claimed in claim 1, characterized in that the metal strip (1) is an aluminum strip.
10. A battery cell comprising the anti-short tab of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022954226.9U CN213816367U (en) | 2020-12-08 | 2020-12-08 | Prevent short circuit utmost point ear and electric core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022954226.9U CN213816367U (en) | 2020-12-08 | 2020-12-08 | Prevent short circuit utmost point ear and electric core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213816367U true CN213816367U (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022954226.9U Active CN213816367U (en) | 2020-12-08 | 2020-12-08 | Prevent short circuit utmost point ear and electric core |
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| Country | Link |
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| CN (1) | CN213816367U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566769A (en) * | 2022-02-28 | 2022-05-31 | 东莞新能安科技有限公司 | Electrochemical device, battery module, and electric device |
| CN115360481A (en) * | 2022-10-21 | 2022-11-18 | 辽宁通用航空研究院 | Aviation lithium battery tab, design method and aviation lithium battery |
-
2020
- 2020-12-08 CN CN202022954226.9U patent/CN213816367U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114566769A (en) * | 2022-02-28 | 2022-05-31 | 东莞新能安科技有限公司 | Electrochemical device, battery module, and electric device |
| CN114566769B (en) * | 2022-02-28 | 2024-01-19 | 东莞新能安科技有限公司 | Electrochemical device, battery module, and electricity using device |
| CN115360481A (en) * | 2022-10-21 | 2022-11-18 | 辽宁通用航空研究院 | Aviation lithium battery tab, design method and aviation lithium battery |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230915 Address after: No.38, Huifeng 7th Road, Zhongkai high tech Zone, Huizhou City, Guangdong Province Patentee after: EVE ENERGY Co.,Ltd. Address before: 516006 63 District, Hui Tai Industrial Park, Zhongkai hi tech Zone, Huizhou, Guangdong Patentee before: Huizhou Yiwei Energy Battery Co.,Ltd. Patentee before: EVE ENERGY Co.,Ltd. |