Patent Application
20070292751
The features of the invention believed to be novel are set forth with particularity in the appended claims. The invention itself however may be best understood by reference to the following detailed description of the invention, which describes certain exemplary embodiments of the invention, taken in conjunction with the accompanying drawings in which:
The technical characteristics, features and advantages of the present invention will become apparent in the following detailed description of the preferred embodiments with reference to the accompanying drawings, and the drawings are provided for reference and illustration and not intended for limiting the scope of the present invention.
Referring to
The casing 10 includes an upper casing panel 11 and a lower casing panel 12 connected to the bottom of the upper casing panel 11, each casing panel 11, 12 could be made of a plastic material, a hollow containing space 13 is formed between the upper casing panel 11 and the lower casing panel 12, and the exterior of the upper casing panel 11 includes an anode 14 and a cathode 15.
The cell 20 is installed in the containing space 13 of the casing 10 and could be a secondary battery such as a lithium-ion battery or a polymer lithium battery. A lateral side of the cell 20 has an anode handle 21 and a cathode handle 22, and the anode handle 21 is electrically coupled to the anode 14 of the casing 10, and the cathode handle 22 is electrically coupled to the cathode 15 of the casing 10.
One or more heat absorbing bodies 30 could be installed in the containing space 13 of the casing 10. This preferred embodiment includes two heat absorbing bodies 30. An end surface of each heat absorbing body 30 is attached onto the corresponding surface of the cell 20, and the heat absorbing body 30 includes an upper soft film 31 and a lower soft film 32 sealed and coupled to the upper soft film 31. The upper soft film 31 and the lower soft film 32 could be made of metal foils (such as aluminum foils and nickel foils), a phase change material 33 is filled between the upper soft film 31 and the lower soft film 32, and the phase change material 33 could be sodium silicate, sodium borate, sodium sulfate, paraffin or their mixtures. Further, the sodium sulfate mixture is composed of water, sodium sulfate, sodium borate, bentonite clay powder and attapulgite clay, and the mixture is in a thick sticky form at room temperature (below 32° C.) for providing the best water absorbing effect and shortening the crystallization time.
The anode and cathode of the casing 10 can be connected to an electric appliance or equipment (not shown in the figure) for supplying electric power to the electric appliance or equipment. After the electric appliance or equipment is turned on, each cell 20 will output electric currents continuously, thus each cell 20 will produce high heat, and such heat will be conducted to the heat absorbing body 30 to heat up the heat absorbing body 30. The phase change material 33 installed in the heat absorbing body 30 absorbs a large amount of heat during the process of converting a solid phase into a liquid phase or a liquid phase into a gas phase, so that each cell 20 can be operated continuously at a lower operating temperature, so as to achieve the effect of extending the life of the battery apparatus.
Referring to
Refer to
If a hole occurs at a portion of the upper soft film 31 or the lower soft film 32 of each block 36, the whole phase change material 33 will not be lost, so as to prevent overheating or damaging the cell 20. Further, the installation of the partition bars 35 can enhance the effect of holding the porous tissue 34.
Refer to
In addition of the aforementioned advantages, the battery apparatus with a heat absorbing body of the present invention will not cause corrosion or electric conduction problems to the cells 20, since the phase change material 33 is sealed between the upper soft film 31 and the lower soft film 32 and selectively installed at a high-heat area (such as the central position) according to the actual heat dissipating requirements of the battery apparatus, so as to achieve the best heat dissipating performance.
In summation of the description above, the battery apparatus with a heat absorbing body of the invention definitely achieves the foregoing objectives and complies with the patent application requirements.
The present invention are illustrated with reference to the preferred embodiment and not intended to limit the patent scope of the present invention. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.
