battery

Abstract

The present invention inhibits heat conduction between a bipolar cell and a potting material in a case. A battery has a case, a plurality of bipolar cells housed in the case in layers, a cooler disposed between electrodes of adjacent bipolar cells, a potting material disposed between the bipolar cells and the case, a heat insulating material disposed between the potting material and the bipolar cells, and a heat conducting material disposed between the potting material and the cooler.

Description

Technical Field

[0001] This invention relates to a battery. Background Technology

[0002] A battery comprising a bipolar cell and a cooler is disclosed (see Patent Document 1).

[0003] Patent Document 1: Japanese Patent Application Publication No. 2021-118058 Summary of the Invention

[0004] However, the existing examples described above do not specifically consider the effects of heat on the potting material when the bipolar cell is housed in a casing and the potting material is filled between the bipolar cell and the casing and then cured.

[0005] The purpose of this invention is to suppress thermal conduction between the bipolar battery and the potting material inside the casing.

[0006] The battery according to the first method has: a casing; a plurality of bipolar cells stacked and housed in the casing; a cooler disposed between the electrodes of adjacent bipolar cells; a potting material disposed between the bipolar cells and the casing; a thermal insulation material disposed between the potting material and the bipolar cells; and a thermally conductive material disposed between the potting material and the cooler.

[0007] In this battery, since the encapsulating material and the bipolar cell are insulated by a heat-insulating material, the heat transfer from the curing heat of the bipolar cell to the encapsulating material can be suppressed. Furthermore, since a thermally conductive material is provided between the encapsulating material and the cooler, excess gaps can be filled with the thermally conductive material, and heat can be dissipated to the cooler when the encapsulating material heats up. In other words, heat transfer from the bipolar cell to the encapsulating material when the bipolar cell heats up can be suppressed, and heat transferred to the encapsulating material can be dissipated to the cooler.

[0008] In the second method, in the battery involved in the first method, the heat-insulating material is further disposed between the bipolar battery and the heat-conducting material.

[0009] In this battery, since the heat insulation material is also disposed between the bipolar battery and the heat-conducting material, and the two are insulated from each other, the heat conduction to the potting material through the heat-conducting material can be suppressed when the bipolar battery heats up.

[0010] Invention Effects

[0011] According to the present invention, thermal conduction between the bipolar battery and the potting material inside the casing can be suppressed. Attached Figure Description

[0012] Figure 1This is a cross-sectional view of the battery involved in this embodiment. Detailed Implementation

[0013] Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings. In the drawings, the same symbols are used to denote the same or identical constituent elements. Furthermore, descriptions and symbols repeated in the embodiments described below may sometimes be omitted. Also, the drawings used in the following description are schematic, and the dimensional relationships and ratios of the elements shown in the drawings may not necessarily correspond to reality. Furthermore, the dimensional relationships and ratios of the elements may not necessarily be consistent between multiple drawings.

[0014] exist Figure 1 In this embodiment, the battery 10 includes a casing 12, a plurality of bipolar cells 14, a cooler 16, a potting material 18, a heat insulation material 20, and a heat-conducting material 22.

[0015] The housing 12 is a bottomed container with an opening at the top, which houses parts or components such as the bipolar battery 14. The top of the housing 12 is covered by a cover or the like.

[0016] The bipolar battery 14 is, for example, stacked in the vertical direction within the housing 12. An electrode 31 is provided on the upper surface of the bipolar battery 14. An electrode 32 of the opposite polarity to the electrode 31 is provided on the bottom surface of the bipolar battery 14. For example, if electrode 31 is the positive electrode, then electrode 32 is the negative electrode. Detailed descriptions of the bipolar battery 14 are omitted.

[0017] A cooler 16 is disposed between the electrodes 31 and 32 of adjacent bipolar cells 14. The cooler 16 is conductive, for example, to electrically connect the adjacent electrodes 31 and 32. If the cooler 16 is not conductive, the electrodes 31 and 32 are electrically connected separately. The width of the cooler 16 in the attached figure is smaller than that of the bipolar cell 14, and a step is formed at the boundary between the bipolar cell 14 and the cooler 16.

[0018] A potting material 18 is disposed between the bipolar battery 14 and the casing 12. The potting material 18 is composed of epoxy resin, silicone, polyurethane, acrylic acid, etc., and is filled in the gap between the bipolar battery 14 and the casing 12 and cured to protect the bipolar battery 14 from environmental factors, mechanical stress, and electrical interference.

[0019] Thermal insulation material 20 is disposed between the potting material 18 and the bipolar cell 14. As an example, the thermal insulation material 20 can be configured from the side of the bipolar cell 14 in a roughly C-shaped cross-section, up to a position where it overlaps with the ends of the electrodes 31 and 32 in the vertical direction. Thus, the thermal insulation material 20 is disposed not only between the potting material 18 and the bipolar cell 14, but also, for example, between the bipolar cell 14 and the thermally conductive material 22.

[0020] A thermally conductive material 22 is disposed between the potting material 18 and the cooler 16, filling the step between the cooler 16 and the heat-insulating material 20 on the side of the bipolar battery 14. The thermally conductive material 22 allows heat from the potting material 18 to dissipate towards the cooler 16. The heat-insulating material 20 and the thermally conductive material 22 are, for example, flush, with the potting material 18 filling the space between this flush plane and the housing 12.

[0021] (effect)

[0022] This embodiment is configured as described above, and its function is explained below. Figure 1 In the battery 10 according to this embodiment, since the encapsulating material 18 and the bipolar battery 14 are insulated by the heat-insulating material 20, the heat conduction from the curing of the bipolar battery 14 to the encapsulating material 18 can be suppressed. Furthermore, since a heat-conducting material 22 is provided between the encapsulating material 18 and the cooler 16, excess gaps can be filled with the heat-conducting material 22, and heat can be dissipated to the cooler 16 via the heat-conducting material 22 when the encapsulating material 18 generates heat. In other words, heat conduction from the bipolar battery 14 to the encapsulating material 18 can be suppressed when the bipolar battery 14 generates heat, and heat transferred to the encapsulating material 18 can be dissipated to the cooler 16.

[0023] When the heat insulation material 20 is also disposed between the bipolar battery 14 and the heat-conducting material 22, the heat conduction through the potting material 18 via the heat-conducting material 22 can be suppressed when the bipolar battery 14 heats up because the two are insulated from each other.

[0024] Thus, according to this embodiment, thermal conduction between the bipolar battery 14 and the potting material 18 within the casing 12 can be suppressed.

[0025] [Other Implementation Methods]

[0026] The above describes one example of an embodiment of the present invention, but the embodiments of the present invention are not limited to the above description, and various modifications can be made without departing from its spirit.

[0027] Symbol Explanation

[0028] 10-Battery, 12-Casing, 14-Bipolar battery, 16-Cooler, 18-Potting material, 20-Insulating material, 22-Thermal conductive material.

Claims

1. A battery, characterized in that, have: case; Multiple bipolar batteries are stacked and housed within the housing; A cooler is disposed between the electrodes of adjacent bipolar cells; Encapsulating material is disposed between the bipolar battery and the casing; A heat-insulating material is disposed between the potting material and the bipolar battery; and A thermally conductive material is disposed between the potting material and the cooler.

2. The battery according to claim 1, characterized in that, The heat insulation material is also disposed between the bipolar battery and the heat-conducting material.

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