A fluid-cooled battery system includes at least one battery module which includes a plurality of rows of battery cells, an outer casing, and at least one cell fixture. The outer casing defines therein an accommodation space. The cell fixture includes a holding web fitted inside the accommodation space, and formed with a plurality of rows of retaining holes. The retaining holes of each row are configured to retain cell bodies of a respective row of the battery cells so as to permit the battery cells to be held in the accommodation space by the holding web, to thereby keep the battery cells in stable position against undesired vibration.

Thermal insulation materials for batteries are generally described. The thermal insulation materials described herein have a number of advantages. For example, in some embodiments, the thermal insulation materials have desirable thermal properties, such as low thermal conductivity and/or high thermal stability. As another example, in some embodiments, the thermal insulation materials described herein have desirable structural properties, such as having a relatively low thickness, and/or beneficial mechanical properties. The thermal insulation materials described herein may also have a combination of desirable thermal and structural properties.

Thermal insulation materials for batteries are generally described. The thermal insulation materials described herein have a number of advantages. For example, in some embodiments, the thermal insulation materials have desirable thermal properties, such as low thermal conductivity and/or high thermal stability. As another example, in some embodiments, the thermal insulation materials described herein have desirable structural properties, such as having a relatively low thickness, and/or beneficial mechanical properties. The thermal insulation materials described herein may also have a combination of desirable thermal and structural properties.

The present disclosure relates to a battery comprising a housing defining an electrochemical zone, at least one electrode that comprises a conductive substrate, wherein the substrate comprises a first region in the electrochemical zone and a second region that protrudes from the electrochemical zone, and a contact tab that is coupled to the second region, wherein the ratio of the width of the second region to the width of the contact tab is greater than 1.

The present disclosure relates to a battery comprising a housing defining an electrochemical zone, at least one electrode that comprises a conductive substrate, wherein the substrate comprises a first region in the electrochemical zone and a second region that protrudes from the electrochemical zone, and a contact tab that is coupled to the second region, wherein the ratio of the width of the second region to the width of the contact tab is greater than 1.

Power supply device includes: battery stack formed by stacking a plurality of battery cells; a pair of end plates disposed at both ends of the battery stack; binding bars configured to connect the pair of end plates; lower plate that is brought into contact with heat radiation surfaces of battery cells forming the battery stack and to which heat energy of battery cell is transferred; and heat conductive sheet having plasticity and stacked on a surface of lower plate. In lower plate, contact surface that is brought into contact with heat conductive sheet is regular uneven surface, heat conductive sheet is stacked on uneven surface in a pressed state, heat conductive surface of heat conductive sheet is deformed into a concave shape along uneven surface, and heat conductive sheet and lower plate are stacked on each other in a contact state.

Power supply device includes: battery stack formed by stacking a plurality of battery cells; a pair of end plates disposed at both ends of the battery stack; binding bars configured to connect the pair of end plates; lower plate that is brought into contact with heat radiation surfaces of battery cells forming the battery stack and to which heat energy of battery cell is transferred; and heat conductive sheet having plasticity and stacked on a surface of lower plate. In lower plate, contact surface that is brought into contact with heat conductive sheet is regular uneven surface, heat conductive sheet is stacked on uneven surface in a pressed state, heat conductive surface of heat conductive sheet is deformed into a concave shape along uneven surface, and heat conductive sheet and lower plate are stacked on each other in a contact state.

A partition member has two surfaces in a thickness direction, and separates single cells that make up an assembled battery. When the average temperature of one of the two surfaces exceeds 180° C., a thermal resistance per unit area (θ.sub.1) in the thickness direction satisfies Expression 1 below, and when the average temperatures of both of the two surfaces do not exceed 80° C., a thermal resistance per unit area (θ.sub.2) in the thickness direction satisfies Expression 2 below.

[00001]$\begin{array}{cc}{\theta }_1\ge 5.0\times {10}^{-3}\left(m^2.Math.K/W\right),\mathrm{and}& \left(\mathrm{Expression}1\right)\\ {\theta }_2\le 4.0\times {10}^{-3}\left(m^2.Math.K/W\right).& \left(\mathrm{Expression}2\right)\end{array}$

A partition member has two surfaces in a thickness direction, and separates single cells that make up an assembled battery. When the average temperature of one of the two surfaces exceeds 180° C., a thermal resistance per unit area (θ.sub.1) in the thickness direction satisfies Expression 1 below, and when the average temperatures of both of the two surfaces do not exceed 80° C., a thermal resistance per unit area (θ.sub.2) in the thickness direction satisfies Expression 2 below.

[00001]$\begin{array}{cc}{\theta }_1\ge 5.0\times {10}^{-3}\left(m^2.Math.K/W\right),\mathrm{and}& \left(\mathrm{Expression}1\right)\\ {\theta }_2\le 4.0\times {10}^{-3}\left(m^2.Math.K/W\right).& \left(\mathrm{Expression}2\right)\end{array}$

A battery module includes a first heat transfer component and a first thermal expansion material member that are disposed between the battery cells adjacent to each other. The first thermal expansion material member has a thermal conductivity lower than a thermal conductivity of the first heat transfer component and expands at a first predetermined temperature or higher, in which when temperature of the first thermal expansion material member is less than the first predetermined temperature, the adjacent battery cells are connected to each other via a high thermal conductive route including the first heat transfer component and having a first thermal conductivity, and in which when the temperature of the first thermal expansion material member reaches the first predetermined temperature or higher, the adjacent battery cells are connected to each other via a low thermal conductive route having a second thermal conductivity lower than the first thermal conductivity.