Lg Chem, Ltd

Lg Chemical Co., Ltd.

John E Namgoong

Do Yang Jung

Junill Yoon

Jisang Yu

Jaesung Ahn

Heekook Yang

Jongmin Park

Jong-yul Ro

Seungjae You

Hyosang Woo

Ra Young Hwang

Jongmoon Yoon

Hey Woong Park

Youngsun Park

Sung-Woo Kim

Juhyun Kang

Seungtaek Hong

Jong Yul Ro

Jae Hun Yang

Sinyoung Park

Sooryoung Kim

Bo Hyun Kim

Yonghan Lee

Seungdon Choi

Yeo Won Yoon

Masayuki Wakebe

Juyoung Kim

Ji Hoon Han

Won Joon Choi

Sain Park

Myung Hwan Kim

Jea Hoon Choi

Woojin Shin

Woo-Chul Yi

Han Eun Kim

Jong-Yul Ro

Hyosang 6-402 Lg Chem Sawon Apt Woo

Jongmin 103-504 Deogammaeul Apt Park

Disclosed herein is a plate-shaped secondary battery used as a unit cell for middle- or large-sized battery pack, the secondary battery having an electrode assembly, which can be charged and discharged, mounted in a sheet-shaped battery case including a metal layer and a resin layer in a sealed state, the electrode assembly having electrode terminals protruding outside a sealing part of the battery case, wherein at least one of the electrode terminals is provided at a position spaced a predetermined distance from the sealing part with a self cutting part having a vertical sectional area less than that of the remaining part of the at least one electrode terminal such that the self cutting part can break first when overcurrent flows in the secondary battery.

Secondary battery having electrode with self cutting part to be destructed on application of over-current

A battery module has a plurality of batteries, each having an electrode assembly mounted in a battery case including a metal layer and a resin layer, as unit cells, are stacked one on another in the thickness direction, wherein the battery module is constructed such that electrode leads of each unit cell are bent and placed on an upper-end sealing part of each unit cell, through-holes for mechanical coupling and electrical connection are formed in the electrode leads and the sealing part such that the through-holes of the electrode leads communicate with the corresponding through-holes of the sealing part, respectively, and conductive coupling members are inserted through the through-holes of the unit cells. The battery module accomplished a maximum reduction in volume, increasing sealability of the sealing part, and easily accomplishing the electrical connection and the mechanical coupling between components.

Battery module of novel structure

A conductive electrode terminal connecting member configured to electrically connect plate-shaped secondary battery cells ('battery cells') constituting a battery module to each other is provided. The electrode terminal connecting member includes a left-wing connection part to which electrode terminals of left-side battery cells are connected so as to achieve electrical connection in series or in series and in parallel between the battery cells, and a right-wing connection part to which electrode terminals of right-side battery cells are connected so as to achieve electrical connection in series or in series and in parallel between the battery cells. The left-wing connection part is provided with slits through which the electrode terminals of the respective battery cells are inserted, and the right-wing connection part is provided with slits through which the electrode terminals of the respective battery cells are inserted.

Electrode terminal connecting member for battery module

Disclosed herein is a middle- or large-sized battery module having a structure in which two or more plate-shaped secondary battery cells ('battery cells') are arranged in a lateral direction thereof, wherein the battery cells have electrode terminals arranged in the same direction, plate-shaped electrode terminal connecting members to electrically connect the battery cells to one another are electrically connected to oriented surfaces of the electrode terminals of the battery cells, each of the electrode terminal connecting members is provided at a top and/or bottom thereof with a coupling structure to interconnect electrode terminal connecting members, and at least one end of an insulating joint member coupled in the coupling structure is supported by a module case.

Middle and large-sized battery module having electrode terminal connecting member and insulating joint member

The present invention relates to a lithium secondary battery comprising a battery cell formed by stacking a plurality of full cells having a structure of cathode/separator/anode or bicells having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode (anode), as a unit electrode assembly, wherein (i) a cathode active material or (ii) an anode active material or (iii) a cathode active material and an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.

Stacking-type secondary battery providing two or more operation voltages

Disclosed herein is a middle- or large-sized battery pack including a plurality of unit cells electrically connected with each other, wherein the battery pack is constructed in a structure in which a heat transfer medium flows through gaps defined between the unit cells for controlling the overall temperature of the battery pack to be within a predetermined temperature range for the optimum operation of the battery pack, and each unit cell is provided at the outer surface thereof, at which the heat transfer medium is brought into contact with each unit cell, with a layer containing a phase transformation material ('phase transformation layer') for minimizing individual temperature difference between the unit cells. The present invention has the effect of controlling the overall temperature of the battery pack and individual controlling the temperatures of unit cells constituting the battery pack. Also, the present invention has the effect of restraining the abrupt change in temperature of the unit cells, when the battery pack is not in operation or when the external environment abruptly changes, thereby preventing the degradation of the unit cells. Furthermore, the present invention has the effect of minimizing damage to the unit cells due to foreign matter when the foreign matter is brought into contact with the unit cells. In addition, the present invention has the effect of reducing the overall temperature difference of the battery pack and manufacturing a middle- or large-sized battery pack having a compact structure.

Battery pack comprising combined temperature-controlling system

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. Consequently, a battery pack including the secondary batteries as unit cells can be manufactured generally in a compact structure and with relatively small weight, and the assembly process of the battery pack is greatly simplified. The battery pack according to the present invention has high structural stability. Consequently, the battery pack can be preferably used as a power source for electric vehicles, hybrid electric vehicles, electric motorcycles, and electric bicycles.

Secondary battery of novel structure and battery pack having the same

Disclosed herein is a secondary battery for medium-sized or large-sized battery modules. The secondary battery is assembled while an electrically connecting member used at the time of manufacturing a battery module is previously welded to at least one of electrode terminals of the secondary battery.

Secondary battery for medium and large size battery module

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.

Cartridge-type lithium ion polymer battery pack

Provided is a stacked-type secondary battery comprising a battery cell formed by stacking a plurality of full cells having a structure of cathode/separator/anode or bicells having a structure of cathode(anode)/separator/anode(cathode)/separator/cathode(anode), as a unit electrode assembly, wherein a cathode active material and/or an anode active material in two or more unit electrode assemblies are configured to have a different composition to induce a voltage difference and separate electrode terminals are installed in a battery case according to the voltage difference to thereby simultaneously provide two or more voltages by a single battery.

Stacking-typed secondary battery providing two or more operation voltages

Provided is a lithium secondary battery which uses a lithium manganese metal oxide as a cathode active material and a non-graphitic carbon material as an anode active material, and based on the total weight of the electrolyte, contains 0.1 to 20% by weight of a salt represented by Formula I in a lithium salt-containing non-aqueous electrolyte:RXYZ&#x2003;&#x2003;(I) The lithium secondary battery of the present invention can improve low-temperature properties of the battery by increasing the lithium ion-electrode reactivity and decreasing the electrode-interface resistance, via the formation of a charge double layer at the cathode-anode interface upon charging/discharging of the battery at a low temperature, and therefore can be preferably used in medium/large battery systems such as power sources for electric vehicles (EVs) and hybrid electric vehicles (HEVs) requiring operation under severe conditions.

Electrolyte for lithium secondary battery of improved low-temperature property and secondary battery containing the same

Disclosed herein is a battery module constructed in a structure in which unit modules are horizontally stacked while the unit modules are vertically erected, wherein the battery module includes a base plate on which the unit modules are horizontally stacked while the unit modules are vertically erected, a pair of side plates fixed to the base plate at lower ends thereof such that the side plates are brought into tight contact with outer surfaces of the outermost unit modules, and a housing fixed to the base plate in a structure to surround the unit modules, the housing being provided at the inside thereof with supporting parts for supporting upper ends of the side plates, respectively.

Medium and large size battery module of vertical stacking structure

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. Furthermore, a risk of an engineer or a user being exposed to the electrical short-circuits is minimized, and a risk of electrical short-circuits due to external forces is greatly reduced.

Secondary battery module, a battery system including the secondary battery module and method of manufacture of the battery system

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.

Battery cartridge for novel structure and open type battery module containing the same

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. Consequently, the present invention has the effect of easily controlling the optimum operating temperature of the battery pack, reducing influences caused by external conditions, and decreasing noise and vibration.

Growing community of inventors

Daejeon, South Korea

John E Namgoong