A flexible thermal insulator for an electric vehicle battery pack, and an electric vehicle battery pack therewith is provided. The flexible thermal insulator has a composite wall including a sheet of fire-resistant material having opposite first and second sides. A first pressure sensitive adhesive layer is bonded to the first side of the sheet of fire-resistant material. Further, one of a scrim reinforced, polyether ether ketone layer is bonded to the second side of the fire-resistant material, or a silicone rubber layer is bonded to the second side of the fire-resistant material.

A flexible thermal insulator for an electric vehicle battery pack, and an electric vehicle battery pack therewith is provided. The flexible thermal insulator has a composite wall including a sheet of fire-resistant material having opposite first and second sides. A first pressure sensitive adhesive layer is bonded to the first side of the sheet of fire-resistant material. Further, one of a scrim reinforced, polyether ether ketone layer is bonded to the second side of the fire-resistant material, or a silicone rubber layer is bonded to the second side of the fire-resistant material.

The present application relates to a thermal insulation fireproof cloth for power battery and its preparation method. A thermal insulation fireproof cloth for power battery includes a fireproof cloth made from fireproof fiber, which can include one or more layers. The fire-facing surface of the fireproof cloth is coated with a high-temperature-resistant fireproof inorganic coating, and an unexposed surface of the fireproof cloth is coated with a structure reinforcing coating. The fireproof cloth is made into a box shape matching with a battery pack and arranged between a battery cell and battery housing. The fireproof cloth is made of high-silica fiber fabric or alumina fiber fabric. The fireproof inorganic coating is an inorganic material coating including SiO.sub.2 and Al.sub.2O.sub.3. The structure reinforcing coating is a coating which contains PTFE, silane, phosphate and alumina.

The present application relates to a thermal insulation fireproof cloth for power battery and its preparation method. A thermal insulation fireproof cloth for power battery includes a fireproof cloth made from fireproof fiber, which can include one or more layers. The fire-facing surface of the fireproof cloth is coated with a high-temperature-resistant fireproof inorganic coating, and an unexposed surface of the fireproof cloth is coated with a structure reinforcing coating. The fireproof cloth is made into a box shape matching with a battery pack and arranged between a battery cell and battery housing. The fireproof cloth is made of high-silica fiber fabric or alumina fiber fabric. The fireproof inorganic coating is an inorganic material coating including SiO.sub.2 and Al.sub.2O.sub.3. The structure reinforcing coating is a coating which contains PTFE, silane, phosphate and alumina.

A secondary battery includes an outer package member, a battery device, and a heat-resistant member. The battery device is contained inside the outer package member. The heat-resistant member has an insulating property and is disposed between the outer package member and the battery device. The outer package member includes a container member and a closing member. The container member has an opening, and contains the battery device inside. The closing member closes the opening, and is welded to the container member. The battery device has an opposed surface and a side surface. The opposed surface is opposed to the closing member. The side surface is coupled to the opposed surface. The heat-resistant member covers from the opposed surface to the side surface.

A secondary battery includes an outer package member, a battery device, and a heat-resistant member. The battery device is contained inside the outer package member. The heat-resistant member has an insulating property and is disposed between the outer package member and the battery device. The outer package member includes a container member and a closing member. The container member has an opening, and contains the battery device inside. The closing member closes the opening, and is welded to the container member. The battery device has an opposed surface and a side surface. The opposed surface is opposed to the closing member. The side surface is coupled to the opposed surface. The heat-resistant member covers from the opposed surface to the side surface.

Battery packs are presented having structural members for improving thermal management of battery cells therein. In some embodiments, the battery packs include a first end-member positioned opposite a second end-member and parallel thereto. The battery packs also include a first side beam positioned opposite a second side beam and parallel thereto. The first side beam and the second side beam extend longitudinally between the first end-member and the second end-member. A longitudinal member is disposed between the first side beam and the second side beam and defines a plurality of longitudinal rows. The battery packs may additionally include a lateral member disposed between first end-member and the second end-member to partition the plurality of longitudinal rows into an array of battery cell compartments. A battery cell is disposed within at least one battery cell compartment.

Battery packs are presented having structural members for improving thermal management of battery cells therein. In some embodiments, the battery packs include a first end-member positioned opposite a second end-member and parallel thereto. The battery packs also include a first side beam positioned opposite a second side beam and parallel thereto. The first side beam and the second side beam extend longitudinally between the first end-member and the second end-member. A longitudinal member is disposed between the first side beam and the second side beam and defines a plurality of longitudinal rows. The battery packs may additionally include a lateral member disposed between first end-member and the second end-member to partition the plurality of longitudinal rows into an array of battery cell compartments. A battery cell is disposed within at least one battery cell compartment.

A battery cell assembly includes a plurality of cylindrical cell blocks, each of the plurality of cylindrical cell blocks including a plurality of cylindrical cells, a block cover configured to cover an upper side of the plurality of cylindrical cell blocks and electrically connect the plurality of cylindrical cell blocks, a cooling plate located opposite to the block cover and disposed at a lower side of the plurality of cylindrical cell blocks and a heat transfer member disposed between the cooling plate and the plurality of cylindrical cell blocks and having a plurality of thermal interface materials corresponding to bottom portions of the plurality of cylindrical cells.

A battery cell assembly includes a plurality of cylindrical cell blocks, each of the plurality of cylindrical cell blocks including a plurality of cylindrical cells, a block cover configured to cover an upper side of the plurality of cylindrical cell blocks and electrically connect the plurality of cylindrical cell blocks, a cooling plate located opposite to the block cover and disposed at a lower side of the plurality of cylindrical cell blocks and a heat transfer member disposed between the cooling plate and the plurality of cylindrical cell blocks and having a plurality of thermal interface materials corresponding to bottom portions of the plurality of cylindrical cells.