# US 9,029,001 B2 · Separator for gel electrolyte storage batteries > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,029,001 B2 - Document ID: US9029001B2 - Status: Granted - Kind: B2 - Application number: 12/733,870 - Filed: 2008-10-17 - Published: 2012-01-26 - Granted: 2015-05-12 - Earliest claimed: 2007-10-20 - Assignees: Exide Technologies - Applicants: Friedrich Kramm; Georg Meckl; Harald Niepraschk; Peter Nemec-Losert - Inventors: Friedrich Kramm; Georg Meckl; Harald Niepraschk; Peter Nemec-Losert - Web page: https://patentgrep.com/patent/US9029001B2 ## CPC - H01M 10/10: Immobilising of electrolyte - H01M 50/414: Synthetic resins, e.g. thermoplastics or thermosetting resins - H01M 50/44: Fibrous material - H01M 50/466: U-shaped, bag-shaped or folded - H01M 50/474: characterised by their position inside the cells - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - Y10T 29/49108: Electric battery cell making - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A separator (1) for electrode plates (2) in gel storage batteries having two substantially rectangular layers (3, 3′) of a flat separator material, which layers come to lie in mutually superposed relationship. In order to provide less expensive separators for the separation of plate electrodes in gel storage batteries, which have a low electrical resistance and which afford additional protection for the edges and side surfaces and at the same time permit homogenous gel filling of the storage battery, the invention proposes that the two layers of separator material are connected together at least portion-wise in the region of their edges, forming a casing or pocket for the introduction of an electrode plate and a method and battery employing the separator. ## Claims ### Claim 1 A separator (1) for electrode plates (2) of storage batteries having two substantially rectangular layers (3, 3′) of a flat separator material, which layers come to lie in mutually superposed relationship, wherein the two layers of separator material are connected together at least portion-wise in the region of their edges, forming a casing or pocket for the introduction of an electrode plate and the separator material has a separator leaf (6) with ribs (5, 5′) on its mutually opposite surfaces, the configuration of the ribs (5) on a surface of the separator leaf has a multiplicity of intersection points (5″) with the configuration of the ribs (5′) on the opposite surface of the separator leaf. ### Claim 2 (depends on 1) A separator according to claim 1 wherein the ribs (5, 5′) project from the surface of the separator leaf (6) and are of a height of between 0.3 mm and 2 mm, preferably between 0.5 mm and 1.5 mm. ### Claim 3 (depends on 2) A separator according to claim 2 wherein the ribs (5, 5′) at least on a surface of the separator leaf (6) extend in substantially parallel relationship. ### Claim 4 (depends on 1) A separator according to claim 1 wherein a centre-to-centre spacing of adjacent ribs (5, 5′) on the same surface of the separator leaf (6) is between 1 mm and 12 mm. ### Claim 5 (depends on 1) A separator according to claim 1 wherein the two layers (3, 3′) are produced in one piece and come to lie in mutually superposed relationship by folding. ### Claim 6 (depends on 1) A separator according to claim 1 wherein the two rectangular layers (3, 3′) which come to lie in mutually superposed relationship are connected together completely at an outside edge of the separator (1) over the entire length of the side edge and are connected together at least partly at the oppositely disposed outside edge of the separator. ### Claim 7 (depends on 1) A separator according to claim 1 wherein the two rectangular layers (3, 3′) which come to lie in mutually superposed relationship are connected together completely at an outside edge of the separator (1) over the entire length of the side edge and are connected together at least portion-wise at the adjoining outside edge of the separator. ### Claim 8 (depends on 1) A separator according to claim 1 wherein the layers (3, 3′) are connected together at least partially by welding or knurling. ### Claim 9 (depends on 1) A separator according to claim 1 wherein the separator material is porous polyethylene or porous polyvinylychloride. ### Claim 10 (depends on 1) A separator according to claim 1 wherein the separator leaf (6) is of a thickness of between 0.1 and 0.6 mm. ### Claim 11 (depends on 1) A separator according to claim 1 wherein at least one additional separation layer in the form of a fiber mat is provided between the layers (3, 3′), which upon insertion of an electrode plate (2) into the separator (1) is arranged between the separator material and the electrode plate. ### Claim 12 A method for retaining an electrode plate (2) in gel storage batteries using a separator having two substantially rectangular layers (3, 3′) of a flat separator material, which layers come to lie in mutually superposed relationship, wherein the two layers of separator material are connected together at least partly in the region of their edges, forming a casing or pocket for the introduction of an electrode plate, wherein the separator material has a separator leaf (6) with ribs (5, 5′) on both mutually opposite surfaces of the separator leaf (6) and the configuration of the ribs (5) on a surface of the separator leaf has a multiplicity of intersection points (5″) with the configuration of the ribs (5′) on the opposite surface of the separator leaf. ### Claim 13 (depends on 12) The method of claim 12 wherein the ribs (5, 5′) at least on a surface of the separator leaf (6) extend in substantially parallel relationship. ### Claim 14 (depends on 12) The method of claim 12 wherein the two layers (3, 3′) are produced in one piece and come to lie in mutually superposed relationship by folding and the two rectangular layers (3, 3′) which come to lie in mutually superposed relationship are connected together completely at an outside edge of the separator (1) over the entire length of the outside edge. ### Claim 15 (depends on 12) The method of claim 12 wherein the separator material is porous. ### Claim 16 (depends on 12) The method of claim 12 wherein the separator leaf (6) is of a thickness of between 0.15 and 0.4 mm. ### Claim 17 (depends on 12) The method of claim 12 wherein at least one additional separation layer in the form of a fiber mat is provided between the layers, and which upon insertion of an electrode plate (2) into the separator (1) is arranged between the separator material and the electrode plate. ### Claim 18 (depends on 1) A storage battery having a separator (1) according to claim 1.