POWER BATTERY COVER

A power battery cover, which comprises a cover plate, a burst vent, a first terminal, a second terminal and a conducting strip; wherein, the burst vent, the first terminal and the second terminal are arranged on the cover plate, the second terminal is electrically connected to the cover plate, and the first terminal is subject to an insulated assembly with the cover plate and is electrically connected to the conducting strip; the power battery cover also comprises a tensile shrapnel which is welded to the cover plate; the tensile shrapnel is arranged under and close to the conducting strip; under the condition of overcharge of a battery, air pressure in the battery cell rises due to decomposition of the electrolyte.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Detailed description of the invention and the beneficial effect thereof is made in conjunction with the accompanying drawings and embodiments. However, the invention is not limited to the embodiments.

Embodiment 1, just shown asFIGS. 1 and 2, a power battery cover comprises a cover plate1, a burst vent2, a first terminal3, a second terminal4and a conducting strip5; wherein, the burst vent2, the first terminal3and the second terminal4are arranged on the cover plate1, the second terminal4is electrically connected to the cover plate1, and the first terminal3is subject to an insulated assembly with the cover plate1and is electrically connected to the conducting strip5; the power battery cover also comprises a tensile shrapnel6which is welded to the cover plate1; the tensile shrapnel6is arranged under and close to the conducting strip5;

Preferably, the tensile shrapnel6comprises a tensile top7and a tensile lateral8, and the tensile lateral8is connected to the tensile top7.

More preferably, a section formed by the tensile top7and the tensile lateral8is shaped like an “n”, the free end of the tensile lateral8is provided with a first extended part12, and the first extended part12is parallel to the tensile top7. The tensile top7shall be made as thick as possible, while the tensile lateral8shall be made as thin as possible, which is to the benefit of elongation under an authorised pressure and of increasing discharge capacity, thus preventing the tensile shrapnel from fusing due to overheating resulted from heavy current after the tensile shrapnel touches the conducting strip.

The tensile shrapnel6is made from aluminum or nickel, while the conducting strip5is made from copper, aluminum or nickel; and the surface of the conducting strip5is nickel plated or tin plated so as to reduce the contact resistance between the conducting strip5and the tensile shrapnel6.

Preferably, the tensile top7is shaped like a rectangle, a circle or an oval.

Embodiment 2, just shown asFIG. 3, is different from Embodiment 1 in that: the tensile lateral8comprises a first arc9and a second extended part10, the first arc9is set as an incurvate semi-circle, the second extended part10is connected to the first arc9, and the second extended part10is parallel to the tensile top7.

The remaining steps are the same as described in Embodiment 1, not repeated here.

Embodiment 3, just shown asFIG. 4, is different from Embodiment 2 in that: the tensile lateral8comprises a second arc19and a first L-shaped block11, the second arc19is set as an incurvate semi-circle, and the first L-shaped block11is connected to the second arc19.

The remaining steps are the same as described in Embodiment 2, not repeated here.

Embodiment 4, just shown asFIG. 5, is different from Embodiment 3 in that: the tensile lateral8comprises a sunken concave part14, a raised convex part15and a second L-shaped block13, the concave part14is smoothly connected to the convex part15, and the convex part15is connected to the second L-shaped block13.

The remaining steps are the same as described in Embodiment 2, not repeated here.

Those skilled in the art can, on the basis of disclosure and instruction of the specification above-mentioned, make a change or modification of the embodiments mentioned above. Therefore, the invention is not limited to the embodiments, and equivalent modification and change of the invention are within the scope of protection of claims of the invention. In addition, some specific terms are used in the specification for the convenience of description, but not to limit the invention.