Secondary battery module
AssigneePrime Planet Energy & Solutions, Inc.
InventorDaiki WATANABE
Life of this patent
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Abstract
Each of a plurality of batteries in a secondary battery module includes a case that accommodates an electrode assembly, the case having a prismatic shape. A positive electrode of the electrode assembly has an end portion on a side close to a first surface of the case, and in a first region in which the first surface of the case is in contact with a heat transfer layer, an inner surface of the first surface and the end portion of the positive electrode are separated from each other by a first distance (A), and in a boundary portion with the first surface, an inner surface of a second surface and an inner surface of a third surface of the case are separated from each other by a second distance (B), and the first distance (A) is 20% or more of the second distance (B).
Claims9
A secondary battery module comprising:
- a plurality of batteries each including an electrode assembly and a case that accommodates the electrode assembly, the case having a prismatic shape, the plurality of batteries being arranged in a first direction;
- a temperature control member that controls a temperature of each of the plurality of batteries;
- and
- a heat transfer layer sandwiched between each of the plurality of batteries and the temperature control member in a second direction orthogonal to the first direction, wherein
- the case has
- a first surface extending in a direction orthogonal to the second direction, having at least a portion in contact with the heat transfer layer, and having a first plate thickness,
- a second surface extending in a direction orthogonal to the first surface and having a second plate thickness, and
- a third surface extending parallel to the second surface and facing the second surface in the first direction,
- the electrode assembly includes a positive electrode and a negative electrode, and the positive electrode has an end portion on a side close to the first surface in the second direction,
- in a first region in which the first surface of the case is in contact with the heat transfer layer, an inner surface of the first surface and the end portion of the positive electrode are separated from each other by a first distance in the second direction,
- in a boundary portion with the first surface, an inner surface of the second surface and an inner surface of the third surface are separated from each other by a second distance in the first direction, and
- the first distance is 20% or more of the second distance.
Dependencies are inferred from the claim text.