Battery device including battery cell group configured by a plurality of laminated battery cells in outer packaging and method for manufacturing the battery device

Patent metadata

Field	Value
Publication number	US-11735785-B2
Application number	US-201817256658-A
Country	US
Kind code	B2
Filing date	Jul 17, 2018
Priority date	Jul 17, 2018
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

A battery device is provided with: an exterior body having two outer side walls; at least one battery cell group that is arranged between the two outer side walls of the exterior body and that is composed of a plurality of laminated battery cells; a first temperature-adjusting medium flow path that is provided in at least one of the two outer side walls of the exterior body and in which a temperature-adjusting medium capable of exchanging heat with the battery cells via the outer side wall flows; and a holding mechanism that brings the battery cell group into contact with the outer side wall so that heat can be exchanged and that holds the battery cell group in the exterior body by applying, to the battery cell group in the exterior body, a pressing force in a direction towards the outer side wall having the first temperature-adjusting medium flow path.

First claim

The invention claimed is:

1. A battery device comprising:
a tubular outer packaging having an upper side wall, a lower side wall, and two outer side walls;
at least one battery cell group disposed between the two outer side walls of the outer packaging, and configured by a plurality of battery cells laminated in a length direction of the outer packaging;
a first temperature-adjusting medium flow path provided to least one of the two outer side walls of the outer packaging; and
a retaining mechanism which causes the battery cell group to contact the outer side wall having the first temperature-adjusting medium flow path in a heat exchangeable manner, and retains the battery cell group within the outer packaging, by applying pressure in a direction pressing towards the outer side wall having the first temperature-adjusting medium flow path from a side opposite to the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group within the outer packaging,
wherein the first temperature-adjusting medium flow path is provided to each of two of the outer side wall,
wherein a plurality of the battery cells groups is disposed in parallel between the two outer side walls in the outer packaging, and
wherein the retaining mechanism is disposed between the plurality of the battery cell groups, and applies pressure against the plurality of battery cell groups in a direction separating the battery cell groups and pressing towards the two outer side walls which are opposing.

2. The battery device according to claim 1 , wherein the first temperature-adjusting medium flow path is provided inside of the outer side wall.

3. The battery device according to claim 1 , wherein the retaining mechanism is configured from a resin which can expand by chemical reaction, or a resin which can fill into the outer packaging at a predetermined filling pressure, and applies pressure in a direction pressing towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by expansion pressure or filling pressure of the resin.

4. The battery device according to claim 3 comprising, at a site adjacent to the resin retaining the battery cell group within the outer packaging, an escape space which permits infiltration of the resin upon deforming by way of load input to the resin.

5. The battery device according to claim 1 ,
wherein the retaining mechanism is configured by a leaf spring of shape memory alloy, and
wherein the leaf spring applies pressure in a direction pressing towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by way of spring counterforce.

6. The battery device according to claim 1 , wherein the retaining mechanism is configured by a coil having elasticity disposed so that an axial direction thereof follows a lamination direction of the battery cells, and
wherein the coil applies pressure in a direction pressing towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by way of being elastically expanded in diameter.

7. The battery device according to claim 6 , wherein the coil is expanded in diameter by being rotationally displaced in an opposite direction to a winding direction.

8. The battery device according to claim 6 , wherein the coil consists of hollow wire having a heat transfer property, and inside of the hollow wire configures a second temperature-adjusting medium flow path.

9. The battery device according to claim 1 , wherein the retaining mechanism is configured by a cam member consisting of a rigid body having a cross-sectional shape in which a radius continuously changes from a center of rotation relative to a rotation direction, and
wherein the cam member applies a pressure in a direction pressing towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by being disposed at a rotational displacement position at which the radius increases along the pressing direction of the battery cell group.

10. The battery device according to claim 9 , wherein at least one end part of the cam member has a fixing member which maintains the rotational displacement position of the cam member.

11. The battery device according to claim 1 , wherein the retaining mechanism is configured by a pressing member capable of increasing width dimension in a pressing direction of the battery cell group by way of elastic deformation, and
wherein the pressing member applies pressure in a direction pressing towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by way of being plastically deformed.

12. The battery device according to claim 1 ,
wherein the retaining mechanism is configured by a link mechanism having two parallel support plates disposed along a lamination direction of the battery cells, and a plurality of parallel connecting members which are rotatably connected over the two support plates, the link mechanism being capable of expanding an interval between the support plates by the support plates relatively moving in opposite directions from each other along the lamination direction of the battery cells, and
wherein the link mechanism applies pressure in a pressing direction towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by way of expansion of the interval between the support plates.

13. The battery device according to claim 12 , wherein end plates are respectively disposed at both ends in the lamination direction of the battery cells in the battery cell group, and
wherein the support plates of the link mechanism are maintained in a state expanding the interval, by being sandwiched between the end plates.

14. The battery device according to claim 1 , wherein the retaining mechanism is configured from a wedge mechanism having a through hole which penetrates the outer packaging, and a wedge member having a sloped surface at a leading end, and
wherein the sloped surface of the wedge member inserted in the through hole applies pressure in a pressing direction towards the outer side wall having the first temperature-adjusting medium flow path against the battery cell group, by way of contacting with the battery cell group.

15. The battery device according to claim 1 ,
wherein the retaining mechanism is configured by a filling member having a gas filled layer in which a gas is filled, and a resin filled layer disposed at an outer circumference of the gas filled layer, and in which curable resin is filled, and
wherein the filling member applies pressure in a pressing direction towards the outer side wall having the first temperature-adjusting medium flow path, against the battery cell group, by the curable resin filled into the resin filled layer curing in a state pushing the battery cell group by way of pressure of the gas filled into the gas filled layer.

16. The battery device according to claim 15 , wherein the filling member has, at a terminal part, a joint part for filling the gas into the gas filled layer, and a joint part for filling the curable resin into the resin filled layer.

17. The battery device according to claim 16 , wherein the joint part is a female joint part.

18. The battery device according to claim 15 , wherein the resin filled layer has a path part traversing the gas filled layer along the pressing direct of the battery cell group.

Assignees

• Honda Motor Co Ltd

Inventors

• Miyoshi Kyosuke
• Takada Satoshi
• Hidaka Shoshi
• Tate Ryu
• Sakai Hideaki
• Asai Yoshiatsu

Classifications

• H01M10/6556 Primary

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M10/6551

  Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings · CPC title

• H01M50/209 Primary

  adapted for prismatic or rectangular cells (H01M50/216 takes precedence) · CPC title

• H01M50/24

  adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658) · CPC title

• H01M50/242

  adapted for protecting batteries against vibrations, collision impact or swelling · CPC title