Gm Global Technolgoy Operations, Inc.

Sami A Syed

Herman K Phlegm

John G Dorrough

Mahmoud H Abd Elhamid

Edgar P Calderon

Benjamin R Christian

Igor M Kan

Nicholas Compton

Roger Michael Brisbane

Robert J Heydel

Jason Mazza

Steven Daniel Lorentz

Timothy J Howe

A cell stack includes adjacent first and second battery cells respectively having a positive cell tab, a negative cell tab, and an outer surface. The outer surfaces are flush. The positive cell tab of the first battery cell protrudes from the outer surface of the first battery cell, and the negative cell tab of the second battery cell protrudes from the outer surface of the second battery cell. An isolative shield is positioned adjacent to the outer surfaces, and defines through-slots receiving therein a respective one of the cell tabs. A method includes providing the cell stack, inserting the cell tabs into the pair of through-slots of the isolative shield, positioning a primary surface of the isolative shield adjacent to the outer surfaces of the adjacent battery cells after inserting the cell tabs, and affixing the primary surface of the isolative shield to the cell stack.

Isolative shield with positional control features for welded flexible cell tabs in an HV battery cell stack

A high voltage battery module includes a plurality of battery cells, a plurality of cooling fins dispersed between the battery cells, and a frame for holding the plurality of battery cells and the plurality of fins. An intumescent layer is proximate to at least one battery module component selected from the battery cells, the plurality of cooling fins, and the frame. The intumescent layer includes sodium silicate having formula NaSiO, pentaerythitol, a resin that is cross-linked by melamine, boron nitride particles, and triammonium phosphate.

Thermal propagation mitigation for HV battery modules

Provided herein are battery packs comprising a first polymeric endplate, a second polymeric endplate, and a plurality (n) of partitions extending between the first endplate and second endplate and defining (n&#x2212;1) battery cavities. Each cavity is capable of receiving a battery cell stack comprising a plurality of battery cells and optionally cooling plates and foam pads. Partitions comprise a plurality of polymeric repeating spacers, and each spacer from each partition can correspond to a cooling plate common to a plurality of battery cell stacks. Each of the repeating spacers and cooling plates can include a plurality of aligned apertures, and corresponding bolts can occupy the aligned apertures and secure the same to the endplates. Each repeating spacer can correspond to a complete or partial battery unit, wherein a complete battery unit comprises a first battery cell, a cooling plate, a second battery cell, and a foam pad.

Polymeric battery frames and battery packs incorporating the same

A coated electronic device that is fire resistant includes an electronic component and an intumescent layer disposed over the electronic component. The intumescent layer includes sodium silicate having formula NaSiO, pentaerythitol, a resin that is cross-linked by melamine, boron nitride particles, and triammonium phosphate.

Thermal protection system for powered circuit boards including fuses

A battery assembly includes a plurality of stacked battery cartridges. Each battery cartridge includes a first receptacle unit, a battery cell stack, and a second receptacle unit positioned within first receptacle unit. The battery cell stack includes a first battery cell, a second battery cell, and a foam layer interposed between the first battery cell and the second battery cell. The battery cell stack is positioned within the first receptacle unit, with the second receptacle unit compressing the battery cell stack. The battery module assembly also includes a receiving assembly that holds the plurality of battery cartridges.

Stackable cartridge module design

A method of assembling a battery module assembly includes a step of preparing a plurality of battery cell stacks. Each battery cell stack is constructed by positioning a pre-compressed foam unit interposed between a first battery cell and a second battery cell. Each battery cell stack is positioned in a receiving frame. After such positioning, the pre-compressed foam unit of each battery cell stack is expanded.

Utilizing vacuum to pre-compress foam to enable cell insertion during HV battery module assembly

A battery module includes two or more battery cells and a continuous wave fin disposed between the battery cells. The construction of the wave fin is generally one-piece such that fewer parts are needed to form the battery module. In a preferred form, the wave fin is made from a high thermal conductivity material to promote removal of heat generated by the batteries during their operation. Portions of the wave fin not in direct contact with the battery cells may be placed in direct contact with a heat sink to help remove excess heat from the module. Expansion units or related additional structure may be placed, along with the various battery cells, between the generally serpentine-shaped wave fin to provide uniformity in cell spacing. A method of making one or more battery modules is also described.

Growing community of inventors

Windsor, CA, United States of America

Sami A Syed