GALVANIC CELL FOR AN ACCUMULATOR

• US 20100119933A1
• Filed: 10/23/2009
• Published: 05/13/2010
• Est. Priority Date: 10/23/2008
• Status: Active Grant

• Current Assignee: Li-Tec Battery GmbH (Mercedes-Benz Group AG)
• Original Assignee: Li-Tec Battery GmbH (Mercedes-Benz Group AG)
• Inventors: Gutsch, Andreas, SCHÄFER, Tim
• Granted Patent: US 8,394,527 B2
• Time in Patent Office: Days
• US Class Current: 429/163
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2307/202 Conductive
• CPC Class Codes: B32B 2307/306 Resistant to heat
• CPC Class Codes: B32B 2307/3065 Flame resistant or retardant, fire resistant or retardant
• CPC Class Codes: B32B 2307/714 Inert, i.e. inert to chemical degradation, corrosion
• CPC Class Codes: B32B 2307/7246 Water vapor barrier
• CPC Class Codes: B32B 2457/10 Batteries
• CPC Class Codes: B32B 2605/08 Cars
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 2200/00 Safety devices for primary or secondary batteries
• CPC Class Codes: H01M 2200/10 Temperature sensitive devices
• CPC Class Codes: H01M 2200/20 Pressure-sensitive devices
• CPC Class Codes: H01M 50/105 Pouches or flexible bags
• CPC Class Codes: H01M 50/117 Inorganic material
• CPC Class Codes: H01M 50/119 Metals
• CPC Class Codes: H01M 50/121 Organic material
• CPC Class Codes: H01M 50/122 Composite material consisting of a mixture of organic and inorganic materials
• CPC Class Codes: H01M 50/124 : having a layered structure
• CPC Class Codes: H01M 50/136 : Flexibility or foldability
• CPC Class Codes: H01M 50/202 : Casings or frames around the primary casing of a single cell or a single battery
• CPC Class Codes: H01M 50/211 : adapted for pouch cells
• CPC Class Codes: H01M 50/22 : of the casings or racks
• CPC Class Codes: H01M 50/242 : adapted for protecting batteries against vibrations, collision impact or swelling
• CPC Class Codes: H01M 50/574 : Devices or arrangements for the interruption of current
• CPC Class Codes: H01M 50/578 : in response to pressure
• CPC Class Codes: Y02E 60/10 : Energy storage using batteries

Abstract

The galvanic cell according to the invention comprises at least one current conductor and a casing. Said casing at least partially surrounds said galvanic cell. A contact area is assigned to said casing. The casing is at least partially materially engaged with the current conductor via the contact area. The casing comprises at least one first layer and one second layer. The materials of said first layer and said second layer of the casing are different in respect to at least one chemical material.

Claims

1. Galvanic cell, comprising:

a current conductor,

a casing which at least partially surrounds the galvanic cell, and

a contact area that is assigned to the casing, in which the casing is at least partially connected with the current conductor,

wherein the casing comprises at least one first layer and one second layer, wherein the material of the first layer and the material of the second layer are different from each other in respect to at least one chemical substance.

2. Galvanic cell according to claim 1, wherein at least one of the layers of casing comprise at least one first material and at least one second material.

3. Galvanic cell according to claim 2, wherein the second material has a higher module of elasticity than the first material, and wherein the second material is realized in the shape of fibers, the fibers are connected with the first material at least partially in material engagement, the fibers are at least partially connected with each other forming a first strand-like entity and wherein a plurality of said first strand-like entities are essentially arranged in the direction of a tensile force.

4. Galvanic cell according to claim 1, wherein at least one first device for conducting electrical current is assigned to casing.

5. Galvanic cell according to claim 4, wherein the at least one device for conducting electrical current has a lower degree of elongation at fracture than casing.

6. Galvanic cell according to claim 1, further comprising at least one first sensor device assigned to the casing.

7. Accumulator comprising at least one galvanic cell according to claim 1, and a wall which at least partially surrounds at least one galvanic cell.

8. Accumulator according to claim 7, wherein the wall comprises at least one third material and at least one fourth material.

9. Accumulator according to claim 8, wherein said fourth material has a higher module of elasticity than the third material,

wherein the fourth material is realized in the shape of fibers,

wherein the fibers are at least partially connected in material engagement with the third material, and wherein

the fibers are connected with each other, at least partly, in a second strand-like entity, several second strand-like entities are arranged essentially in the direction of a tensile force.

10. Accumulator (10) according to claim 7, wherein the wall (11) comprises at least one second device for conducting electrical current, which is at least partially surrounded by the wall (11).

11. Accumulator (10) according to claim 7, wherein at least one second device for conducting electrical current (13) has a lower degree of elongation at fracture than wall (11).

12. Accumulator (10) according to claim 7, wherein at least one second sensor unit (14) is assigned to wall (11).

13. Accumulator (10) according to claim 7, further comprising at least one dampening unit (15) which is assigned to at least one galvanic cell.