Accumulator

1. A rechargeable battery comprising:

several cylindrical cells for storing electrical energy and

at least one cooling device for cooling or controlling the temperature of the cells,

wherein the cooling device has at least one coolant channel, at least one coolant inlet and at least one coolant outlet,

wherein the cooling device has at least one multi-layer film which is at least partially arranged between the cells,

wherein the at least one multi-layer film comprises a first laminate comprising a first plastic film, an enforcement layer connected thereto, a metal film connected to the enforcement layer or a metalized further plastic film connected to the enforcement layer,

wherein the enforcement layer of the first laminate is arranged between the first plastic film of the first laminate and the metal film or the metalized further plastic film of the first laminate,

wherein the cooling device comprises a further multi-layer film,

wherein the at least one multi-layer film and the further multi-layer film are connected to one another forming the at least one coolant channel between the at least one multi-layer film and the further multi-layer film,

wherein the further multi-layer film comprises at least one second plastic film, which is partially connected to the first plastic film of the first laminate in connection areas, such that between the connection areas at least one cavity is formed, which forms the at least one coolant channel,

wherein the further multi-layer film comprises a second laminate comprising the at least one second plastic film, an enforcement layer connected thereto, a metal film connected to the enforcement layer or a metalized further plastic film connected to the enforcement layer,

wherein the enforcement layer of the second laminate is arranged between the first plastic film of the first laminate and the metal film or the metallized further plastic film of the second laminate, and

wherein the at least one multi-layer film and the further multi-layer film are arranged such that the first plastic film and the second plastic film lie against one another forming a partial connection via the first plastic film and the second plastic film.

2. The rechargeable battery according to claim 1 , wherein the enforcement layer of the first laminate comprises a fiber reinforcement.

3. The rechargeable battery according to claim 2 , wherein the fiber reinforcement is formed by a woven fabric.

4. The rechargeable battery according to claim 1 , wherein at least one of the first plastic film, the second plastic film, the metalized further plastic film of the first laminate and the metalized further plastic film of the second laminate comprises a plastic material that is selected from a group consisting of polyethylene (PE), polyoxymethylene (POM), polyamide (PA), polyphenylene sulfide (PPS), polyethylene terephthalate (PET), cross-linked polyolefins, thermoplastic elastomers on ether basis/ester basis, styrene block copolymers, silicone elastomers.

5. The rechargeable battery according to claim 1 , wherein the coolant outlet and/or the coolant inlet is formed by a distancing element between the at least one multi-layer film and the further multi-layer film.

6. The rechargeable battery according to claim 1 , wherein in a direction towards the cells several films are arranged on top of one another and several coolant channels are formed between these films.

7. The rechargeable battery according to claim 6 , wherein a fiber layer is arranged between the several films arranged on top of one another.

8. The rechargeable battery according to claim 7 , wherein the coolant channels are at least partially formed in the fiber layer.

9. The rechargeable battery according to claim 1 , wherein the coolant channel is arranged to extend spirally.

10. The rechargeable battery according to claim 1 , wherein the cooling device is formed to be hose-shaped.

11. The rechargeable battery according to claim 1 , wherein the enforcement layer of the second laminate comprises a fiber reinforcement.

12. The rechargeable battery according to claim 11 , wherein the fiber reinforcement is formed by a woven fabric.