Abstract: A battery module includes a first housing portion and a second housing portion defining a sealed volume. A plurality of electrochemical cells is provided in the volume, each of the plurality of electrochemical cells including a respective vent to enable a release of a gas into the volume when an internal pressure of the respective electrochemical cell reaches a threshold. A ventilation vent is coupled with the housing and in fluid communication with the volume. A burst vent is coupled with the housing and in fluid communication with the volume, the burst vent including a valve having a first valve portion and a second valve portion. The first and second valve portions enable a staged release of vented gases through the burst vent based on incremented thresholds.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.

Abstract: Systems and methods for de-energizing battery packs in vehicles that receive at least a portion of their motive power from electricity generated from a battery are provided. By way of example, one embodiment includes a battery de-energizer that is configured to electrically couple to a port or receptacle, such as the service disconnect receptacle, on the vehicle and discharge the electrical energy stored in the battery pack. Another embodiment includes a battery management unit (BMU) designed to monitor one or more sensors to determine if a crash has occurred. If a crash is determined, the BMU electrically couples a battery de-energizer circuit to the battery pack to discharge the electrical energy stored in the battery pack.

Abstract: A system includes a vent housing configured to be installed on a lower housing of a battery module at a first side of the vent housing. The vent housing has a main body having an opening on a second side of the vent housing and an internal chamber coupled to the opening. The internal chamber includes a first wall having an internal burst vent configured to open at a first pressure threshold and a second wall having a ventilation vent comprising a gas-selective permeability layer.