Cell structure having improved heat dissipation and lower vibrations

1. A cell structure, comprising:

at least one electrode comprising:

a positive pole active material layer;

a current collector; and

a negative pole active material layer;

a separator provided between each electrode; and

a casing, and satisfying the following inequality (1):

S

c

×

1000

>

b

×

1000

S

(

1

)

wherein b (mm) indicates a short-side length of the electrode; S (m 2 ) indicates an electrode area; c (mm) indicates a cell structure thickness; and 1000 (m 2 /mm) is a constant, and

wherein the separators have a different Shore A hardness and the separator having the lowest Shore A hardness is placed at a center of the cell structure.

2. A cell structure according to claim 1 having a bipolar structure formed by lamination of not less than 2 bipolar electrodes.

3. A cell structure according to claim 1 , wherein an outer periphery length of the electrode is not less than 130 times the thickness c of the cell structure.

4. A cell structure according to claim 3 , wherein the outer periphery length of the electrode is 150 to 2000 times the thickness c of the cell structure.

5. A cell structure according to claim 1 , wherein an outer periphery length of the electrode is 750 to 1450 mm and the cell structure thickness c is 0.1 to 10 mm.

6. A cell structure according to claim 1 , wherein the cell structure thickness c is 0.1 to 8 mm.

7. A cell structure according to claim 1 , wherein a length of the diagonal lines of the electrode is 260 to 550 mm, and an acute angle formed by the diagonal lines of the electrode is not less than 60° and not more than 90°.

8. A cell structure according to claim 1 , wherein the casing is made of a polymer-metal composite material.

9. A cell structure according to claim 1 , wherein the Shore A hardness of the separators is in the range of 20 to 110.

10. A cell structure according to claim 9 , wherein the separators comprises at least one member selected from a group consisting of a polyester-based resin, an aramid-based resin, a polypropylene-based resin, an inorganic material containing polyester-based resin, an inorganic material containing polypropylene-based resin, and an inorganic material containing aramid-based resin.

11. A cell structure according to claim 1 , wherein an average particle diameter of a positive pole active material forming the positive pole active material layer is not larger than 2 μm.

12. A cell structure according to claim 1 , wherein a positive pole active material forming the positive active material layer comprises a Li-Mn based complex oxide and /or a Li-Ni based complex oxide.

13. A cell structure according to claim 1 , wherein an average particle diameter of the negative pole active material forming the negative pole active material layer is not larger than 2 μm.

14. A cell structure according to claim 1 , wherein an negative pole active material forming the negative pole active material layer comprises a crystalline carbon material and /or an amorphous carbon material.

15. A cell structure according to claim 9 , wherein a passage curvature of the separator is 0.5 to 2.0.

16. A combined cell formed by connecting, in series and/or parallel, not less than 2 cell structures according to claim 1 .

17. A vehicle equipped with the cell structure according to claim 1 .

18. A vehicle equipped with the combined cell according to claim 16 .

19. A cell structure according to claim 1 , wherein the separator holds an electrolyte to form an electrolyte layer.