Abstract: Disclosed herein is a secondary battery module constructed approximately in a rectangular parallelepiped structure. The battery module includes a pair of side members (right and left side members) having pluralities of grooves formed at the inside surfaces thereof such that the sides of unit cells are securely fitted in the grooves and at least one connection member integrally formed with the side members such that the side members are spaced apart from each other by the width of the unit cells while the grooves of the side members face each other. A medium- or large-sized battery system is manufactured using one or more secondary battery module. The secondary battery module allows a plurality of unit cells to be mounted in the battery module with high density. Consequently, the total size of the battery system can be considerably reduced, and the electrical connection between the electrodes is highly stable.

Abstract: Disclosed herein is a heat exchange system for battery packs, which controls the temperature of a medium- or large-sized battery pack including a plurality of unit cells such that the battery pack can be operated under the optimum operating conditions. The heat exchange system includes an air inlet port and an air outlet port formed at one side of a housing surrounding the outer surface of the battery pack so as to form a predetermined flow channel, through which air flows, a driving fan mounted in the flow channel for driving the air to flow through the flow channel, and a Peltier element mounted at the air inlet port for controlling the temperature of air introduced into the air inlet port. In the heat exchange system according to the present invention, the thermoelectric element is mounted inside the air inlet port, through which air for cooling the battery pack is introduced into the heat exchange system.

Abstract: A battery cartridge includes a pair of outer frame members for receiving unit cells and an inner frame member disposed between the outer frame members. The unit cells are mounted between the outer and inner frame members. The inner frame member has a plurality of through-holes, which communicate with the outside while the unit cells are mounted between the outer and inner frame members. An opened type battery module includes such a battery cartridge. The battery cartridge and the battery module have a high structural integration and mechanical strength. Consequently, the present invention has the effect of minimizing the size of a battery system, stably mounting unit cells having low mechanical strength, and effectively removing heat from the unit cells.

Abstract: Disclosed herein is a battery module for medium- or large-sized battery packs, including a plurality of unit cells, wherein the unit cells are generally plate-shaped unit cells, and the unit cells are electrically connected with each other while the unit cells are arranged in a module case so as to constitute at least two rows and at least two columns. According to the present invention, integration of the battery module is highly improved. Especially, the vertical-direction mechanical strength of the battery module is further increased, and the number of connecting members necessary for the electrical connection between the unit cells is reduced.

Abstract: Disclosed herein are a secondary battery including an electrode assembly for charging and discharging mounted in a sheathing member including a metal layer and a resin layer, wherein the secondary battery further includes a secondary battery having a molding part of a predetermined thickness at least partially formed at the outside of a sheathing member, preferably, at a sealing region of the sheathing member, and a medium- or large-sized battery pack including the same. The molding part is formed at the outside of the sheathing member of the secondary battery. Consequently, the secondary battery according to the present invention has high mechanical strength, and therefore, it is possible to construct a battery pack without using addition members, such as cartridges. When the molding part is formed at the sealing region, which is weak, the molding part increases the mechanical strength and the sealing force of the secondary battery.

Abstract: A process for controlling temperature of a battery pack includes operating a fan to change a battery temperature to an optimal range of temperature (Topt) when a condition is satisfied that the battery temperature is equal to or greater than a maximum acceptable temperature (Tmax) or when the battery temperature is equal to or less than a minimum acceptable temperature (Tmin) and, at the same time, when the difference between a battery temperature (Tbat) and an air temperature (Tair) of air is equal to or greater than a critical temperature (Tct), and operating the fan to change the battery temperature to an optimal range of temperature variation (Topt1) of each unit cell when the battery temperature does not satisfy the condition, and a temperature variation (Tvar) of each unit cell is equal to or greater than a predetermined critical temperature (Tcrt1).

Abstract: Disclosed herein is a cooling system for a battery pack that is usable as a power source of electric vehicles and hybrid-electric vehicles. The cooling system has the effect of effectively dissipating heat generated from battery cells by supplying a refrigerant to the battery cells at a constant flow rate, and of minimizing a temperature difference between the battery cells during a cooling process. This prevents degradation in the performance of the battery cells, and achieves optimal temperature control. Also, the cooling system employs a single refrigerant guide member arranged at a side of the battery pack, resulting in a reduction in the size of an overall battery system.

Abstract: A member for measurement of cell voltage and temperature in a battery pack comprises temperature measuring elements (a) attached to the surfaces of unit cells, and a printed circuit board (b) having protrusions formed at the upper end thereof such that the protrusions are connected to electrode lead connection members that connect electrode leads of the unit cells, connection parts formed at the lower part thereof for allowing the temperature measuring elements to be attached to the printed circuit board, and a circuit through which electric current for voltage measurement of the unit cells and electric current for temperature measurement of the temperature measuring elements flow.

Abstract: Disclosed is a cartridge-type lithium ion polymer battery pack including: at least two lithium ion polymer batteries in which adjacent electrode tabs are connected to each other so as to form a predetermined series circuit with a desired instrument; and an upper plate and a lower plate disposed at the top and the bottom of the whole lithium ion polymer batteries, respectively, and coupled to each other so that each lithium ion polymer battery is partially covered with them. Multiple layers of the battery packs are laminated and fixed with ease so as to conform to the electric power requirement for a desired instrument.