POWER STORAGE MODULE, POWER STORAGE SYSTEM, ELECTRONIC APPARATUS, ELECTRIC VEHICLE, AND POWER SYSTEM

• US 20170352931A1
• Filed: 12/11/2015
• Published: 12/07/2017
• Est. Priority Date: 01/16/2015
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: YOSHIDA, NAOTAKE, AOYAMA, TSUTOMU, ADACHI, TATSUYA, ONO, HIROAKI, YOSHIZAWA, NORITSUGU
• Granted Patent: US 10,446,890 B2
• Time in Patent Office: Days
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/617 for achieving uniformity or desired distribution of temperature
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/627 Stationary installations, e.g. power plant buffering or backup power supplies
• CPC Class Codes: H01M 10/637 characterised by the use of reversible temperature-sensitive devices, e.g. NTC, PTC or bimetal devices; characterised by control of the internal current flowing through the cells, e.g. by switching means for preventing undesired use or discharge H01M50/572
• CPC Class Codes: H01M 10/643 Cylindrical cells
• CPC Class Codes: H01M 10/652 characterised by gradients for achieving a desired temperature gradient H01M10/617
• CPC Class Codes: H01M 10/653 characterised by electrically insulating or thermally conductive materials
• CPC Class Codes: H01M 10/6553 Terminals or leads
• CPC Class Codes: H01M 10/6554 Rods or plates
• CPC Class Codes: H01M 10/6556 Solid parts with flow channel passages or pipes for heat exchange closed pipes H01M10/6552
• CPC Class Codes: H01M 10/6562 with free flow by convection only
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: H01M 50/291 characterised by their shape
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A power storage module includes: a battery block group including a plurality of battery cells; a connecting terminal portion joined to terminal surfaces of the plurality of battery cells; and a heat conductive material arranged in a manner contacting the connecting terminal portion. The heat conductive material includes at least any member of a plurality of interspersed members or a member having a clearance. The heat conductive materials are distributed more densely in a center portion of a region surrounded by an outermost peripheral edge of the battery block group than in peripheral portions surrounding the center portion in a plan view from a normal line direction of an arrangement surface of the heat conductive materials.

Claims

1. A power storage module comprising:

a battery block group including a plurality of battery cells;

a connecting terminal portion joined to terminal surfaces of the plurality of battery cells; and

a heat conductive material arranged on the connecting terminal portion in a contacting manner, wherein

the heat conductive material includes at least any member of a plurality of interspersed members or a member having a clearance, and

the heat conductive materials are distributed more densely in a center portion of a region surrounded by an outermost peripheral edge of the battery block group than in peripheral portions surrounding the center portion in a plan view from a normal line direction of an arrangement surface of the heat conductive materials.

2. The power storage module according to claim 1, wherein the heat conductive materials are distributed more densely in part of peripheral portions near a heat generating member than in the peripheral portions excluding the part of the peripheral portions in the plan view from the normal line direction of the arrangement surface of the heat conductive materials.

3. The power storage module according to claim 1, wherein the heat conductive materials are formed of a plurality of interspersed members, and an area of a flat surface shape of the member is smaller than an area of an end surface of the battery cell.

4. The power storage module according to claim 3, wherein one piece of the member is arranged in a position corresponding to one end surface of the battery cell.

5. The power storage module according to claim 4, wherein the member is arranged in a position corresponding to substantially a center of one end surface of the battery cell.

6. The power storage module according to claim 1, wherein

the heat conductive materials are more densely arranged on a center portion side than on an outer peripheral side

at least on anyone of a front end side of the peripheral portions, a rear end side of the peripheral portions, and a center side of the peripheral portions located between the front end side and the rear end side of the peripheral portions in the plan view from the normal line direction of the arrangement surface of the heat conductive materials.

7. The power storage module according to claim 1, wherein the heat conductive material has a sheet-like shape.

8. The power storage module according to claim 1, wherein

the heat conductive materials are formed of a plurality of interspersed members, and

the member has a shape same as or a shape similar to a flat surface shape of a terminal surface of the battery cell.

9. The power storage module according to claim 1, including a stacked body in which battery units each including a battery case housing the battery block group, the connecting terminal portion, and the heat conductive material are stacked in two or more stages, wherein

the heat conductive materials are arranged on one surface side and the other surface side facing the one surface side of the stacked body.

10. The power storage module according to claim 9, wherein distribution of the heat conductive materials arranged on the one surface side differs from distribution of the heat conductive materials on the other surface side.

11. The power storage module according to claim 9, wherein

the battery case has a structural body fitted into a space equivalent to substantially a size of one battery cell, and

at least part of the structural body is located in the center portion in a plan view from a normal line direction of an arrangement surface of the heat conductive materials.

12. The power storage module according to claim 1, wherein the battery block group has a structure in which a plurality of battery rows including the plurality of battery cells arranged in rows is arranged side by side in a direction substantially orthogonal to a row direction.

13. The power storage module according to claim 12, wherein the connecting terminal portion is joined to terminal surfaces of the plurality of battery cells constituting at least one of the battery rows, and has a longitudinal direction arranged in parallel to the row direction of the battery row.

14. A power storage system configured to be charged by a power generator in which the power storage module according to claim 1 generates power from renewable energy.

15. A power storage system including the power storage module according to claim 1 and configured to supply power to an electronic apparatus connected to the power storage module.

16. An electronic apparatus configured to receive power supply from the power storage module according to claim 1.

17. An electric vehicle comprising:

a converter configured to receive power supply from the power storage module according to claim 1 and convert the power to drive force of a vehicle; and

a control device configured to perform information processing related to vehicle control on the basis of information related to the power storage module.

18. A power system wherein

a power information transmitting/receiving unit configured to perform transmission and receipt of signals with other apparatuses via a network is provided, and

charging/discharging control for the power storage module according to claim 1 is performed on the basis of information received by the transmitting/receiving unit.

19. A power system configured to receive power supply from the power storage module according to claim 1 or supply power to the power storage module from a power generator or a power network.