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A battery pack (1) has a double casing structure, including an inner case (2) disposed inside an outer case (3). The inner case (2) includes a radiator plate (9) that is in contact with the side walls of battery cells (4) disposed within the battery pack (1). A forked air passage (32) extends from an air inlet (27) and is defined between the inner case (2) and the outer case (3) and along the outer surface of the radiator plate (9) until reaching a pair of air outlets (31). 6. A process for the preparation of a benzophenone compound of claim 1 which co...
A battery pack (1) has a double casing structure, including an inner case (2) disposed inside an outer case (3). The inner case (2) includes a radiator plate (9) that is in contact with the side walls of battery cells (4) disposed within the battery pack (1). A forked air passage (32) extends from an air inlet (27) and is defined between the inner case (2) and the outer case (3) and along the outer surface of the radiator plate (9) until reaching a pair of air outlets (31). 6. A process for the preparation of a benzophenone compound of claim 1 which comprises the following steps: (i) reacting a hydroxyhydrocarbyl functional benzophenone, described by the following structure: wherein R is a hydroxyalkyl group containing from one to about 10 carbon atoms, and X, Y and Z are as described above, with a carbonyl compound for a sufficient time and at a suitable temperature and pressure, optionally in the presence of a catalyst, to form a first reaction product; and (ii) reacting the first reaction product with additional hydroxyhydrocarbyl functional benzophenone wherein the hydroxyalkyl group contains from 1 to about 10 carbon atoms to form a compound of claim 1. 7. The process of claim 5, wherein the hydroxyhydrocarbyl functional benzophenone is 2-hydroxy-4-hydroxyethoxy benzophenone, and the carbonyl compound is a dialkyl carbonate or dialkyl oxalate. 8. The process of claim 7, wherein each alkyl group of the carbonyl compound contains from one to about 4 carbon atoms. 9. The process of claim 8, wherein each alkyl group of the carbonyl compound is a methyl group. 10. The process of claim 5, wherein the catalyst is an inorganic acid, an organic acid, a Lewis acid or a base. 11. The process of claim 10, wherein the acid catalyst is RCO2H, RSO3H, RsO2H, RSH, ROH, RPO3H, RPO2H, wherein R is a hydrocarbyl group, HCl, HBr, HI, HNO3,HNO2,H2S, H2SO4,H2CO3,acetic acid, formic acid, propionic acid, butanoic acid, benzoic acid, phthalic acid, oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, methanesulfonic acid, p-toluenesulfonic acid, aluminum halides, alkylaluminum halides, boron halides, dialkyl tin oxides and derivatives thereof, tin halides, titanium halides, lead halides, zinc halides, iron halides, gallium halides, arsenic halides, copper halides, cadmium halides, mercury halides, antimony halides and mixtures thereof. 12. The process of claim 10, wherein the Lewis acid catalyst is aluminum trichloride, aluminum tribromide, 1,3-diacetoxy-1,1,3,3-tetrabutyldistannoxane, trimethylaluminum, boron trifluoride, boron trichloride, zinc dichloride, titanium tetrachloride, titanium (IV) isopropoxide, tin dichloride, tin tetrachloride, a tetraalkoxytitanate or mixtures thereof. 13. The process of claim 10, wherein the base catalyst is an alkoxide compound, a hydroxide compound, an amide compound, a carbonate compound, a bicarbonate compound, an organic amine including triethylamine, 2,6-lutidine, DBU (1,8-diazobicyclo[5.4.0]undec-7-ene, or DBN (1,5-diazobicyclo[4.3.0]non-5-ene, a tertiary amine compound. 14. The process of claim 13, wherein the base catalyst is sodium methoxide. 15. The process of claim 5, wherein the catalyst is present in an amount between about 0.5 to about 30 molar percent based on the molar amount of benzophenone. 16. The process of claim 15, wherein the catalyst is present in an amount between about 0.5 to about 5 molar percent based on the molar amount of hydroxyhydrocarbyl functional benzophenone. 17. The process of claim 5, wherein the solvent is excess dialkyl carbonate, excess dialkyl oxalate, toluene, xylene, benzene, mesitylene, tetralin, naptha, hexane, heptane, cyclohexane, octane, an alcohol, a halogenated solvent including methylene chloride, chloroform, chlorobenzene, an ether including diethyl ether, diphenyl ether, dioxane and tetrahydrofuran, an amide including dimethylformamide, a sulfoxide including dimethyl sulfoxide, a ketone including 2-butanone and methyl butyl ketone and mixtures thereof. 18. The process of claim 5, wherein the reaction is carried out at a temperature of from about 25° C. to about 250° C. 19. The process of claim 5, wherein the reaction is carried out at a temperature of from about 75° C. to about 150° C. 20. A process for the preparation of a benzophenone compound of claim 1, which com