Construction machine

• US 9,611,624 B2
• Filed: 05/13/2015
• Issued: 04/04/2017
• Est. Priority Date: 05/30/2014
• Status: Active Grant

• Current Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Original Assignee: Hitachi Construction Machinery Company Limited (Hitachi, Ltd.)
• Inventors: Yoshida, Shinichiro, Naya, Itaru, Takeuchi, Ken, Yoshihara, Shigeyuki
• Primary Examiner(s): Phan, Hau
• Assistant Examiner(s): MEYER, JACOB B
• Application Number:
  US14/710,638
• Publication Number:
  US 20150345110A1
• Time in Patent Office: 692 Days
• CPC Class Codes: B60K 11/04 Arrangement or mounting of radiators, radiator shutters, or radiator blinds B60K11/085 takes precedence
• CPC Class Codes: B60K 7/0015 the motor being hydraulic
• CPC Class Codes: B60Y 2200/412 Excavators
• CPC Class Codes: E02F 9/0866 Engine compartment, e.g. heat exchangers, exhaust filters, cooling devices, silencers, mufflers, position of hydraulic pumps in the engine compartment
• CPC Class Codes: E02F 9/123 Drives or control devices specially adapted therefor E02F9/125 and E02F9/128 take precedence
• CPC Class Codes: E02F 9/166 movable, tiltable or pivoting, e.g. movable seats, dampening arrangements of cabins seats for vehicles in general B60N2/00
• CPC Class Codes: E02F 9/20 Drives; Control devices gearings in general F16H; controlling in general G05; electric multi-motor drives H02K, H02P
• CPC Class Codes: E02F 9/2075 of the hybrid type for vehicles in general B60W20/00
• CPC Class Codes: E02F 9/2091 Control of energy storage means for electrical energy, e.g. battery or capacitors energy recovery arrangements in hydraulic or pneumatic drives E02F9/2217
• CPC Class Codes: H01G 2/10 Housing; Encapsulation
• CPC Class Codes: H01G 9/0003 Protection against electric or thermal overload; cooling arrangements; means for avoiding the formation of cathode films H01G9/12 takes precedence
• CPC Class Codes: H01M 2220/20 Batteries in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 50/204 Racks, modules or packs for multiple batteries or multiple cells
• CPC Class Codes: 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
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 903/907 Electricity storage, e.g. battery, capacitor

Abstract

An electric power storage device (19) disposed on a revolving frame (6) located closer to an upstream side in a flow direction of cooling air (F) than a heat exchanger (18) is provided on an upper revolving structure (4). The electric power storage device (19) has a box-shaped casing (20) forming an outer wall and a battery module (29) provided in the casing (20) and accommodating an electrolyte. An electrolyte discharge pipe (30) for discharging an electrolyte mist and/or electrolyte injected out of the battery module (29) at abnormality of the battery module (29) to an outside of the upper revolving structure (4) is provided on the casing (20).

Claims

1. A construction machine comprising:

an automotive lower traveling structure, an upper revolving structure provided rotatably on said lower traveling structure, and a working mechanism provided on a front side of said upper revolving structure and driven by a hydraulic actuator,

said upper revolving structure including;

a revolving frame forming a support structural body;

an engine provided on said revolving frame at a location on a rear part side of said revolving frame;

a hydraulic pump driven by said engine and supplying a pressurized oil to said hydraulic actuator;

an assist power generator/electric motor coupled to said engine and said hydraulic pump and performing a power generator action and an electric motor action;

a cooling fan for sucking an outside air as cooling air and supplying said cooling air toward said engine;

a heat exchanger provided on said revolving frame at a location closer to an upstream side in a flow direction of said cooling air than said cooling fan and cooling a fluid by said cooling air; and

an electric power storage device disposed on said revolving frame at a location closer to the upstream side in the flow direction of said cooling air than said heat exchanger and charging generated power by said assist power generator/electric motor or discharging the charged power, wherein

said electric power storage device has a box-shaped casing forming an outer wall and a battery module provided inside said casing and accommodating an electrolyte,

an electrolyte discharge pipe provided on said casing and configured to discharge at least one of an electrolyte mist and an electrolyte ejected from said battery module to an outside of said upper revolving structure when said battery module is in an abnormal state, and

said electrolyte discharge pipe is further configured such that a base end is connected to said casing of said electric power storage device, and a distal end is open on a lower surface side of said revolving frame.

2. The construction machine according to claim 1, wherein

said battery module of said electric power storage device is constituted as a lithium ion battery.