# US 12,009,535 B2 · Battery power supply for an industrial truck used in a potentially explosive area

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- Number: US 12,009,535 B2
- Document ID: US12009535B2
- Status: Granted
- Kind: B2
- Application number: 16/962,604
- Filed: 2019-01-04
- Published: 2021-03-25
- Granted: 2024-06-11
- Earliest claimed: 2018-01-17
- Assignees: Ktm AG
- Applicants: Stöcklin Logistik AG
- Inventors: Joerg Backhaus
- Web page: https://patentgrep.com/patent/US12009535B2

## CPC

- H01M 50/202: Casings or frames around the primary casing of a single cell or a single battery
- H01M 50/342: Non-re-sealable arrangements
- B66F 9/07531: {Battery compartments}
- H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/425: {Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00)}
- H01M 50/20: Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46)
- H01M 50/213: adapted for cells having curved cross-section, e.g. round or elliptic (H01M50/209, H01M50/216 take precedence)
- H01M 50/24: adapted for protecting batteries from their environment, e.g. from corrosion (thermal insulation H01M10/658)
- H01M 50/249: specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64)
- H01M 50/253: adapted for specific cells, e.g. electrochemical cells operating at high temperature
- H01M 50/262: with fastening means, e.g. locks
- H01M 50/271: Lids or covers for the racks or secondary casings
- H01M 50/284: with incorporated circuit boards, e.g. printed circuit boards [PCB]
- H01M 50/383: Flame arresting or ignition-preventing means
- H01M 50/394: {Gas-pervious parts or elements}
- H01M 2010/4271: {Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing}
- H01M 2010/4278: {Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- H02J 7/751: {concerning the insertion or the connection of the batteries}
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B66F: HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD ({invalid lifting devices A61G7/10; } mounting artificial islands on piles or like supports E02B17/00; scaffolding combined with lifting devices E04G1/22; lifting devices for sliding forms E04G11/24; lifting of buildings E04G23/06; shores or struts E04G25/00; lifts or other hoisting devices on ladders E06C7/12; props for mining E21D15/00)
- H02J: ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

A battery power supply (1) for an industrial truck (8) used in a potentially explosive area is provided, having a housing (2) having a housing body (47) and a lid (4), wherein the housing body (47) has a receiving chamber (48) for receiving a battery tray (3) that has an inner chamber (20) having a traction battery (25) arranged therein, and the lid (4) is releasably placed on the housing body (47) using securing means (53), and the battery tray (3) has a battery tray lid (49) and a base (26) having walls (17, 18) extending away from the base (26), wherein, in a region adjacent to the base (26), at least one wall (17, 18) has a recess (19) penetrating the wall (17, 18) into the inner chamber (20).

## Claims

### Claim 1

A battery power supply (1) for an industrial truck (8) used in a potentially explosive area, the power supply comprising:
a housing (2) having a housing body (47) and a housing lid (4), wherein the housing body (47) has a receiving chamber (48) for receiving a battery tray (3), which battery tray has an inner chamber (20) having a traction battery (25) arranged therein, and the housing lid (4) is releasably fixable on the housing body (47) by securing means (53), and wherein the battery tray (3) has a battery tray lid (49) and a base (16) having transverse walls (17) and longitudinal walls (18) extending away from the base (16); and
at least one of the walls (17, 18) has, in a region adjacent to the base (16), a recess (19) penetrating the at least one wall (17, 18) into the inner chamber (20).

### Claim 2 (depends on 1)

The battery power supply (1) according to claim 1, wherein, in a top view, the base (16) has a rectangular configuration having longitudinal sides and transverse sides, and the longitudinal sides have a longitudinal extension that is greater than the longitudinal extension of the transverse sides, and, to form the inner chamber (20), the walls (17, 18) extend away from the base (16) at an angle thereto, and the transverse walls (17) arranged on the transverse sides have a penetrating recess (19) in the region of the center of the longitudinal extension of the respective transverse wall (17), and the longitudinal walls (18) arranged on the longitudinal sides respectively have two penetrating recesses (19) on opposite end regions (22) of the longitudinal sides of the respective longitudinal wall (18).

### Claim 3 (depends on 2)

The battery power supply (1) according to claim 2, wherein the penetrating recesses (19) are formed as rectangular wall apertures (21) penetrating the respective transverse wall (17) or longitudinal wall (18).

### Claim 4 (depends on 3)

The battery power supply (1) according to claim 3, wherein the recesses (19) are formed on a base-side end region of the inner chamber (20) of the battery tray (3), and have an entire surface which reduces a test explosion inner pressure emerging as a result of a test explosion triggered in the housing (2) as part of a type-testing of the housing (2) to a permissible inner pressure prevailing in the battery tray (3), which is smaller than an explosion inner pressure that opens the battery tray (3) and/or the housing (2).

### Claim 5 (depends on 4)

The battery power supply (1) according to claim 4, wherein the recesses (19) are on the base-side end region of the inner chamber (20) of the battery tray (3) above the base (16) in a region at which a superposition wave occurs, which is caused by an explosion triggered in the housing (2).

### Claim 6 (depends on 1)

The battery power supply (1) according to claim 1, further comprising a finely processed cavity surface (33), having a predetermined cavity surface width and an average roughness of less than or equal to 6.3 μm, formed between a lid surface (31) facing towards the housing body (47) and a surface of the housing body (47) facing towards the housing lid (4).

### Claim 7 (depends on 1)

The battery power supply (1) according to claim 1, wherein the housing lid (4) is releasably placed on the housing body (47) by means of a plurality of screw connections (53), and the screw connections (53) are provided running along an outer peripheral line (28) of the housing lid (4) and are at a predetermined spacing apart from one another.

### Claim 8 (depends on 1)

The battery power supply (1) according to claim 1, further comprising an intermediary lid (36), releasably fixed on the battery tray (3), is provided between the receiving chamber (48) and an underside (35) of the battery tray lid (49), said intermediary lid forming a receiving chamber (37) between an upper side (38) of the intermediary lid (36) and the underside (35) of the battery tray lid (49) and being formed to receive an electronic circuit (14).

### Claim 9 (depends on 8)

The power supply (1) according to claim 8, further comprising cable screw connections (5, 6, 7, 10, 11) for providing an electrical charging connection for charging the traction battery (25) and an electrical output connection for providing electrical energy for the industrial truck (8).

### Claim 10 (depends on 8)

The battery power supply (1) according to claim 8, further comprising a load power circuit switchable by a contactor (43) for the operation of the industrial truck (8), and a charging power circuit switchable by a contactor (44) for charging the traction battery (25).

### Claim 11 (depends on 10)

The battery power supply (1) according to claim 10, further comprising an externally switchable linking device (45) coupled to the contactors (43, 44) such that an external circuit alternately switches the load power circuit without power and interconnects the charging power circuit such that the charging power circuit is without power with a switched load power circuit.

### Claim 12 (depends on 8)

The battery power supply (1) according to claim 8, further comprising an interface device (12) for exchanging data and/or signals between the electronic circuit (14) functionally coupled to the traction battery (25) and an external charging device for charging the traction battery (25).

### Claim 13 (depends on 1)

The battery power supply (1) according to claim 1, wherein the traction battery (25) comprises a plurality of lithium iron phosphate cells (39) arranged extensively in parallel to the base (16) of the battery tray (3), and further comprising empty spaces (41) between the cells (39) for gaseous fluid to pass out of the inner chamber (20) to the recess (19).

### Claim 14 (depends on 2)

An industrial truck (1) having at least one electrically actuated drive device for driving the industrial truck (8) and/or moving a load, comprising a battery power supply (1) according to claim 2.

### Claim 15 (depends on 12)

The battery power supply (1) according to claim 12, wherein the interface device (12) comprises a CAN-bus interface.

### Claim 16 (depends on 9)

The battery power supply (1) according to claim 9, further comprising a CAN-bus interface device for exchanging data and/or signals between the electronic circuit (14) functionally coupled to the traction battery (25) and an external charging device for charging the traction battery (25).

### Claim 17 (depends on 10)

The battery power supply (1) according to claim 10, further comprising a CAN-bus interface device for exchanging data and/or signals between the electronic circuit (14) functionally coupled to the traction battery (25) and an external charging device for charging the traction battery (25).

### Claim 18 (depends on 11)

The battery power supply (1) according to claim 11, further comprising a CAN-bus interface device for exchanging data and/or signals between the electronic circuit (14) functionally coupled to the traction battery (25) and an external charging device for charging the traction battery (25).