RECHARGEABLE BATTERY PACK FOR AN ELECTRICAL LOAD

• US 20130164600A1
• Filed: 12/24/2012
• Published: 06/27/2013
• Est. Priority Date: 12/22/2011
• Status: Active Grant

• Current Assignee: Andreas STIHL AG & Company KG (Stihl Holding AG & Company KG)
• Original Assignee: Andreas STIHL AG & Company KG (Stihl Holding AG & Company KG)
• Inventors: Rosskamp, Heiko, Liebhard, Gernot, Gaul, Henrik, Reber, Volker, Kolb, Joachim
• Granted Patent: US 8,968,913 B2
• Time in Patent Office: Days
• US Class Current: 429/159
• CPC Class Codes: H01M 10/0481 Compression means other than compression means for stacks of electrodes and separators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/488 Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
• 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 50/502 Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention is directed to a rechargeable battery pack for an electrical load with the load being connected to the rechargeable battery pack by a connection cable. A housing of the rechargeable battery pack has an inner space for accommodating a large number of rechargeable individual cells which are electrically connected to one another and supply the load via the connection cable. To provide the housing with a high level of stability, provision is made for the receiving space in the housing to be subdivided into individual receptacles by partition walls. A cell pack includes a predefined number of the individual cells and is arranged in a corresponding individual receptacle. Each cell pack forms an independent unit which is held in the individual receptacle. The individual cells of a cell pack are electrically and mechanically connected to one another by cell connectors.

Claims

1. A rechargeable battery pack for an electric load comprising:

a connecting cable;

a multiplicity of rechargeable individual cells which are electrically interconnected and configured to feed the electric load via said connecting cable;

a housing having a receiving space configured for accommodating said, multiplicity of cells;

partitioning walls configured to subdivide said receiving space into individual receptacles;

said multiplicity of individual cells being apportioned into a plurality of cell packs wherein each one of said cell packs contains a predetermined number of said individual cells;

said cell packs defining respective independent components configured to be held in corresponding ones of said, receptacles;

a plurality of cell connectors assigned to corresponding ones of said cell packs; and

,

each one of said cell connectors being configured to electrically interconnect the individual cells of the cell pack to which said one connector is assigned.

2. The rechargeable battery pack of claim 1, wherein each one of said cell packs has an outer contour;

and, said housing has engagement elements configured to engage into the outer contour of each one of said cell packs so as to secure the cell pack in the receptacle corresponding thereto.

3. The rechargeable battery pack of claim 1, wherein each one of said cell packs has a height H;

and, said partitioning walls extend over approximately all of said height H.

4. The rechargeable battery pack of claim 1, wherein said housing has a main body;

and, said receptacles are formed in said main body.

5. The rechargeable battery pack of claim 1, wherein said housing includes a back plate;

and, said receptacles are formed on said back plate.

6. The rechargeable battery pack of claim 4, wherein said housing includes a main plate, a base, and a housing cover;

said main plate and said base conjointly define the shape of said main body of said housing as an L-shape which delimits said receiving space; and

, said housing cover is configured to close said receiving space.

7. The rechargeable battery pack of claim 6, wherein each one of said partition walls is conjointly defined by a first elevation section configured on said main plate and a second elevation section configured on said cover.

8. The rechargeable battery pack of claim 1, wherein each one of said receptacles has a base and supports provided on said base configured to hold the cell pack in said one receptacle in an aligned manner.

9. The rechargeable battery pack of claim 8, wherein said, one cell pack is held at approximately the same distance to each of the partition walls defining the receptacle corresponding to said one cell pack.

10. The rechargeable battery pack of claim 1, wherein said partition wails are configured as ribs of said housing;

said housing has two mutually adjacent first narrow sides and two mutually adjacent second narrow sides; and

, one of said partition walls extends between said two mutually adjacent first;

narrow sides and the other one of said partition walls extends between said mutually adjacent second narrow sides.

11. The rechargeable battery pack of claim 10, wherein each one of said partition walls defines a longitudinal direction;

and, at least one of said partition walls has an elastic deformation sons in said longitudinal direction thereof.

12. The rechargeable battery pack of claim 11, wherein said elastic deformation zone comprises a wall section of said one partition wall which is wave-shaped no s-shaped.

13. The rechargeable battery pack of claim 12, wherein each one of said cell packs has an outer contour with a plurality of recesses formed therein;

said housing has engagement elements configured to engage into said recesses of said outer contour of each one of said cell packs so as to secure said cell pack in said receptacle; and

, said engagement elements are formed by said wave-shaped wall section of said deformation zone.

14. The rechargeable battery pack of claim 13, wherein each one of said cell packs has a first and a second longitudinal side;

and, a plurality of said recesses are arranged on said first longitudinal side so as to be offset from a plurality of said recesses arranged on said second longitudinal side,

15. The rechargeable battery pack of claim 3, wherein said housing has first and second upwardly-directed sides;

at least one of said partition walls runs from said first upwardly-directed side to said second upwardly-directed side; and

, said partition wall includes an interruption.

16. The rechargeable battery pack of claim 15, wherein at least one of said partition walls has an interruption at the elevation of each of said, receptacles;

and, said interruptions are formed by respective cutouts in said one partition wall.

17. The rechargeable battery pack of claim 16, wherein said cell packs have wiring running between each other;

and, slides configured to close said cutouts, respectively, and hold said wiring.

18. The rechargeable battery pack of claim 3, wherein said housing has a narrow side;

at least one of said partition walls has an arch-shaped connecting section which is partially cylindrical in cross-section;

said one partition wall is connected, to said narrow side of said housing via said connecting section.

19. The rechargeable battery pack of claim 18, wherein the partially cylindrical connecting section defines an edge having cutouts configured therein for guiding cables.

20. The rechargeable battery pack of claim 1, wherein said housing has an outer side;

and, said outer side has partially thickened portions configured as reinforcement.

21. The rechargeable battery pack of claim 1, wherein said housing includes a housing cover;

and, said housing cover has partially thickened portions configured as reinforcement.

22. The rechargeable battery pack of claim 1 further comprising a electrical terminal box arranged in said housing.

23. The rechargeable battery pack of claim 22, wherein said housing includes a main plats;

and, said electrical terminal box is arranged recessed in said main plate.

24. The rechargeable battery pack of claim 23, wherein said housing has a base and an upper narrow side;

said main plate has an upper end region; and

, said electrical terminal box is arranged in said upper end region of said main plate below said upper narrow side.

25. The rechargeable battery pack of claim 1, wherein said cell packs are interconnected via at least one of signal lines and energy lines.