A controller discharges a traction battery according to power limits defined by output that is indicative of a state of charge of the traction battery and is updated by a bar delta filter according to a balancing current. The balancing current is associated with each cell of a string of series connected cells of the traction battery and represents a deviation of an estimated current through the cell from a total current of the string.

In an electrified vehicle, such as a battery electric vehicle, those with a hybrid powertrain, range extended electric vehicles, or hydrogen powered vehicles, integration of the battery may mean that space is very constrained. Typically this means that there is no feasible method to lift the battery to disengage it from the vehicle or to operate any engagement catches or locks etc. The disclosure provides a roller arrangement which has no translation or actuator requirements in order to allow the battery to have reduced frictional engagement with the battery compartment during installation or removal, and also to be well engaged with the battery compartment once installed. Rollers are provided which drop into recesses in the battery compartment at which point they are removed from load bearing engagement and thus, the recesses serve to locate the battery into the installed state in the compartment.

In an electrified vehicle, such as a battery electric vehicle, those with a hybrid powertrain, range extended electric vehicles, or hydrogen powered vehicles, integration of the battery may mean that space is very constrained. Typically this means that there is no feasible method to lift the battery to disengage it from the vehicle or to operate any engagement catches or locks etc. The disclosure provides a roller arrangement which has no translation or actuator requirements in order to allow the battery to have reduced frictional engagement with the battery compartment during installation or removal, and also to be well engaged with the battery compartment once installed. Rollers are provided which drop into recesses in the battery compartment at which point they are removed from load bearing engagement and thus, the recesses serve to locate the battery into the installed state in the compartment.

An apparatus includes an interconnect assembly configured to receive and retain multiple batteries. The interconnect assembly includes a retainer configured to receive portions of the batteries and a conductive interconnect layer carried by the retainer. The conductive interconnect layer includes a first layer of conductive material having a first thickness and a second layer of conductive material having a second thickness less than the first thickness. The first and second layers of conductive material are attached together to form the conductive interconnect layer. The second layer of conductive material includes multiple interconnects configured to be coupled to cathodes and anodes of the batteries.

An apparatus includes an interconnect assembly configured to receive and retain multiple batteries. The interconnect assembly includes a retainer configured to receive portions of the batteries and a conductive interconnect layer carried by the retainer. The conductive interconnect layer includes a first layer of conductive material having a first thickness and a second layer of conductive material having a second thickness less than the first thickness. The first and second layers of conductive material are attached together to form the conductive interconnect layer. The second layer of conductive material includes multiple interconnects configured to be coupled to cathodes and anodes of the batteries.

A bicycle battery system includes a battery tray that mounts within a cavity formed by an opening in a bicycle tube. The battery tray includes a latch mechanism, a first base portion that mounts to the latch mechanism, and a second base portion that mounts to the first base portion. The first base portion includes a cup that is sized to mate with an interior of the bicycle tube. The system also includes a battery that is sized to fit within the battery tray. A first end of the battery includes a protrusion that is sized to fit within the cup of the first base portion, and a second end of the battery includes a secondary latch to secure the second end to the battery tray. The system further includes a battery cover plate mounted to the battery.

A bicycle battery system includes a battery tray that mounts within a cavity formed by an opening in a bicycle tube. The battery tray includes a latch mechanism, a first base portion that mounts to the latch mechanism, and a second base portion that mounts to the first base portion. The first base portion includes a cup that is sized to mate with an interior of the bicycle tube. The system also includes a battery that is sized to fit within the battery tray. A first end of the battery includes a protrusion that is sized to fit within the cup of the first base portion, and a second end of the battery includes a secondary latch to secure the second end to the battery tray. The system further includes a battery cover plate mounted to the battery.

A secondary battery includes a battery element including a positive electrode, a negative electrode, and an electrolytic solution, a housing member configured to accommodate the battery element, and a safety valve mechanism attached to the housing member. The safety valve mechanism includes a valve member including an opening valve portion configured to be opened; and an opening member including a plurality of opening portions radially arranged in a region opposed to the opening valve portion from a center of the region as a base point, and a plurality of protrusion portions radially arranged in a region outside the plurality of opening portions from the center and the plurality of protrusion portions protrude toward the plurality of opening portions. A number of the opening portions and a number of the protrusion portions are equal to each other, and each of the plurality of opening portions and each of the plurality of protrusion portions are opposed to each other in a direction toward the center.

A secondary battery includes a battery element including a positive electrode, a negative electrode, and an electrolytic solution, a housing member configured to accommodate the battery element, and a safety valve mechanism attached to the housing member. The safety valve mechanism includes a valve member including an opening valve portion configured to be opened; and an opening member including a plurality of opening portions radially arranged in a region opposed to the opening valve portion from a center of the region as a base point, and a plurality of protrusion portions radially arranged in a region outside the plurality of opening portions from the center and the plurality of protrusion portions protrude toward the plurality of opening portions. A number of the opening portions and a number of the protrusion portions are equal to each other, and each of the plurality of opening portions and each of the plurality of protrusion portions are opposed to each other in a direction toward the center.

A battery housing for a drive battery, comprising at least one housing shell, wherein the housing shell is formed at least partially or fully from a thermoplastic, wherein the housing shell has a receiving region for insertion of a drive battery, wherein the housing shell has a wall, wherein the wall has a two-layer or multi-layer sandwich structure, wherein at least a first layer of the sandwich structure, at least in some sections, is distanced from a second layer of the sandwich structure such that a wall cavity is formed between the first layer and the second layer, and wherein the wall cavity is designed to store a cooling medium.