| IPC 7 English version |
 H01M - H01M 6/52 |
| H01M00800-H01M01600 |
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| SECTION H – ELECTRICITY |
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| H 01 | BASIC ELECTRIC ELEMENTS |
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| H 01 M | PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY (electrochemical processes or apparatus in general C25; semiconductor or other solid state devices for converting light or heat into electrical energy H01L, e.g. H01L 31/00, H01L 35/00, H01L 37/00) [2] |
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8/ | 00 | Fuel cells; Manufacture thereof [2] |
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| Note |
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| In this group, fuel cells are electrochemical generators wherein the reactants are supplied from outside. [2] |
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8/ | 02 | . | Details (of non-active parts H01M 2/00, of electrodes H01M 4/00) [2] |
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8/ | 04 | . | Auxiliary arrangements or processes, e.g. for control of pressure, for circulation of fluids [2] |
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8/ | 06 | . | Combination of fuel cell with means for production of reactants or for treatment of residues (regenerative fuel cells H01M 8/18; production of reactants per se, see sections B or C) [2] |
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8/ | 08 | . | Fuel cells with aqueous electrolytes [2] |
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8/ | 10 | . | Fuel cells with solid electrolytes [2] |
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8/ | 12 | . | . | operating at high temperature, e.g. with stabilised ZrO2 electrolyte [2] |
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8/ | 14 | . | Fuel cells with fused electrolytes [2] |
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8/ | 16 | . | Biochemical fuel cells, i.e. cells in which micro-organisms function as catalysts [2] |
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8/ | 18 | . | Regenerative fuel cells [2] |
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8/ | 20 | . | Indirect fuel cells, e.g. redox cells (H01M 8/18 takes precedence) [2] |
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8/ | 22 | . | Fuel cells in which the fuel is based on materials comprising carbon or oxygen or hydrogen and other elements; Fuel cells in which the fuel is based on materials comprising only elements other than carbon, oxygen, or hydrogen [2] |
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8/ | 24 | . | Grouping of fuel cells into batteries, e.g. modules [2] |
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10/ | 00 | Secondary cells; Manufacture thereof [2] |
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| Note |
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| In this group, secondary cells are accumulators receiving and supplying electrical energy by means of reversible electrochemical reactions. [2] |
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10/ | 02 | . | Details (of non-active parts H01M 2/00, of electrodes H01M 4/00) [2] |
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10/ | 04 | . | Construction or manufacture in general (H01M 10/12, H01M 10/28, H01M 10/38 take precedence) [2] |
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10/ | 06 | . | Lead-acid accumulators (semi-lead accumulators H01M 10/20) [2] |
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10/ | 08 | . | . | Selection of materials as electrolytes [2] |
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10/ | 10 | . | . | . | Immobilising of electrolyte [2] |
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10/ | 12 | . | . | Construction or manufacture [2] |
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10/ | 14 | . | . | . | Assembling a group of electrodes or separators [2] |
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10/ | 16 | . | . | . | Suspending or supporting electrodes or groups of electrodes in the case [2] |
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10/ | 18 | . | . | with bipolar electrodes [2] |
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10/ | 20 | . | Semi-lead accumulators, i.e. accumulators in which only one electrode contains lead [2] |
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10/ | 22 | . | . | Selection of materials as electrolytes [2] |
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10/ | 24 | . | Alkaline accumulators [2] |
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10/ | 26 | . | . | Selection of materials as electrolytes [2] |
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10/ | 28 | . | . | Construction or manufacture [2] |
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10/ | 30 | . | . | Nickel accumulators (H01M 10/34 takes precedence) [2] |
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10/ | 32 | . | . | Silver accumulators (H01M 10/34 takes precedence) [2] |
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10/ | 34 | . | Gastight accumulators [2] |
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10/ | 36 | . | Accumulators not provided for in groups H01M 10/06 to H01M 10/34 [2] |
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10/ | 38 | . | . | Construction or manufacture [2] |
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10/ | 39 | . | . | working at high temperature [2] |
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10/ | 40 | . | . | with organic electrolytes [2] |
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10/ | 42 | . | Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells [2] |
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10/ | 44 | . | . | Methods for charging or discharging (circuits for charging H02J 7/00) [2] |
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10/ | 46 | . | . | Accumulators structurally combined with charging apparatus (circuits for charging H02J 7/00) [2] |
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10/ | 48 | . | . | Accumulators combined with arrangements for measuring, testing, or indicating condition, e.g. level or density of the electrolyte (indicating or measuring level of liquid in general G01F 23/00; measuring density G01N, e.g. G01N 9/00; measuring electric variables G01R) [2] |
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10/ | 50 | . | . | Heating or cooling or regulating temperature (control of temperature in general G05D 23/00) [2] |
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10/ | 52 | . | . | Removing gases inside the secondary cell, e.g. by absorption (vent plugs or other mechanical arrangements for facilitating escape of gases H01M 2/12) [2] |
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10/ | 54 | . | Reclaiming serviceable parts of waste accumulators [2] |
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12/ | 00 | Hybrid cells; Manufacture thereof [2] |
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| Note |
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| In this group, hybrid cells are electrochemical generators having two different types of half-cells, the half-cell being an electrode-electrolyte combination of either a primary, a secondary, or a fuel cell. [2] |
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12/ | 02 | . | Details (of non-active parts H01M 2/00, of electrodes H01M 4/00) [2] |
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12/ | 04 | . | composed of a half-cell of the fuel-cell type and of a half-cell of the primary-cell type (methods or arrangements for servicing or maintenance H01M 6/50) [2] |
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12/ | 06 | . | . | with one metallic and one gaseous electrode [2] |
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12/ | 08 | . | composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type (methods or arrangements for servicing or maintenance, e.g. for charging, H01M 10/42) [2] |
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14/ | 00 | Electrochemical current or voltage generators not provided for in groups H01M 6/00 to H01M 12/00 [2] |
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16/ | 00 | Structural combinations of different types of electrochemical generators [2] |
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| H01M - H01M 6/52 |  |
