Battery housing for lithium-ion cells

#This application is a 35 U.S.C. §371 National Stage Application of PCT/EP2012/056864, filed on Apr. 16, 2012, which claims the benefit of priority to Serial No. DE 10 2011 075 318.4, filed on May 5, 2011 in Germany, the disclosures of which are incorporated herein by reference in their entirety.

#The present disclosure relates to a battery housing, in particular for lithium-ion cells, a galvanic cell and a battery.

#Lithium-ion cells have a positive electrode, referred to as the cathode, and a negative electrode, referred to as the anode, onto which the lithium-ions are reversible deposited and removed again, which is also referred to as intercalation or de-intercalation. A specific packaging form of lithium-ion cells is referred to as lithium-ion polymer cells or lithium-polymer cell. This is understood to mean lithium-ion cells which are packed in an aluminum composite foil, which in the technical technology is also referred to as a pouch or soft pack.

#Further advantages and advantageous refinements of the subject matters according to the disclosure are illustrated by the drawings and explained in the following description. It is to be noted here that the drawings only have a descriptive character and are not intended to limit the disclosure in any way. In the drawings:

#FIG. 1 shows a schematic cross section through an embodiment of a battery according to the disclosure, parallel to the side faces of the galvanic cells;

#FIG. 2a shows a schematic cross section through a first refinement of the embodiment shown in FIG. 1, of a battery according to the disclosure perpendicular to the side faces of the galvanic cells, in which one dispenser is provided per cell; and

#FIGS. 1, 2a and 2b show a battery housing 1, in the interior space of which sixteen modules composed of six galvanic cells 2, in particular lithium-ion cells, each, are arranged. The figures illustrate the fact that the cells 2 are each provided with a cut-out area 3 which can be opened in the event of failure of the cell 2. Within the scope of the embodiments shown, the cut-out areas 3 are formed in a section which is countersunk with respect to the main face of the upper side of the cell. The figures also show that the interior space of the battery housing 1 also has a dispenser 4 for dispensing a flame-inhibiting, flame-retarding and/or flame-extinguishing, liquid, solid or foam agent which have dispenser openings 5; 5a, 5b, 5c, 5d, 5e, 5f which are arranged adjacent to a cut-out area 3 of a cell 2 and can be opened.

#According to the disclosure, these dispenser openings 5; 5a, 5b, 5c, 5d, 5e, 5f are configured to be capable of opening in the event of a mechanical shock and/or an increase in temperature and/or a pressure increase above a predetermined limiting value.

#Within the scope of the embodiment shown, the dispenser openings 5; 5a, 5b, 5c, 5d, 5e, 5f are embodied in the form of thinning of the wall of the dispenser 4. In this context, the dispenser 4 can be formed, at least in the region of the dispenser opening 5; 5a, 5b, 5c, 5d, 5e, 5f, partially or completely from an organic, for example polymer and/or wax-like, or inorganic material, for example in the form of glass, in order to ensure the dispenser opening 5; 5a, 5b, 5c, 5d, 5e, 5f opens in the event of a mechanical shock and/or an increase in temperature and/or a pressure increase. Alternatively, the dispenser openings 5; 5a, 5b, 5c, 5d, 5e, 5f can have an opening mechanism, for example a valve, by means of which the dispenser opening 5; 5a, 5b, 5c, 5d, 5e, 5f can be opened automatically (not illustrated). Such an opening mechanism can open automatically, for example when an accident of a vehicle comprising the battery housing 1 is detected on the basis of crash sensor data, for example an acceleration sensor, of the vehicle.