WO2005109545A1 - Battery case - Google Patents

Battery case Download PDF

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Publication number
WO2005109545A1
WO2005109545A1 PCT/KR2004/001423 KR2004001423W WO2005109545A1 WO 2005109545 A1 WO2005109545 A1 WO 2005109545A1 KR 2004001423 W KR2004001423 W KR 2004001423W WO 2005109545 A1 WO2005109545 A1 WO 2005109545A1
Authority
WO
WIPO (PCT)
Prior art keywords
vertical
electrolytic bath
battery case
holes
battery
Prior art date
Application number
PCT/KR2004/001423
Other languages
French (fr)
Inventor
Se-Woong Oh
Bong-Ki Park
Tae-Sin Kim
Original Assignee
Saebang Battery Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saebang Battery Co., Ltd. filed Critical Saebang Battery Co., Ltd.
Publication of WO2005109545A1 publication Critical patent/WO2005109545A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L50/00—Electric propulsion with power supplied within the vehicle
    • B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
    • B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
    • B60L50/64—Constructional details of batteries specially adapted for electric vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
    • B60L58/26—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by cooling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/61—Types of temperature control
    • H01M10/613—Cooling or keeping cold
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
    • H01M10/625—Vehicles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/654—Means for temperature control structurally associated with the cells located inside the innermost case of the cells, e.g. mandrels, electrodes or electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6567—Liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/112—Monobloc comprising multiple compartments
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/147—Lids or covers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/202—Casings or frames around the primary casing of a single cell or a single battery
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/65—Means for temperature control structurally associated with the cells
    • H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
    • H01M10/6561—Gases
    • H01M10/6566—Means within the gas flow to guide the flow around one or more cells, e.g. manifolds, baffles or other barriers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

Definitions

  • the present invention relates generally to a battery case, particularly to a battery cases for effectively dissipating the heat generated from a 36V car-battery.
  • a 12V car-battery has a case including an electrolytic bath with its top opened and an upper lid covering the opened top.
  • the electrolytic bath is partitioned into six compartments. Each compartment is filled with electrolyte and has a cell (a group of electrode plates) inserted therein.
  • the car-battery A pair of terminals is connected to the cells.
  • the car battery as structured above is placed on a tray and mounted in the engine room.
  • the conventional 12V battery cannot supply enough electric power to effectively cope with a trend toward increased amount of consumed power due to an increase in the number of electronic equipment in the car and the higher grade in their quality and functions. Therefore, A 36V car-battery has been proposed, and the development and commercialization of 36V batteries have been extensively attempted.
  • the 36V battery is structured to have eighteen cells connected in series, in contrast with the six cells in the conventional 12V-battery structure.
  • the 36V car-battery can be easily heated up during charging and discharging thereof, due to the higher number of cells and their congregated structure.
  • the center portion of the 36V battery may be heated up to around 80 ° C, and thus the electrolyte filled therein is also heated likewise, thereby significantly deteriorating the performance and lifespan of the battery, along with danger of explosion.
  • Korean Patent No. 292222 The conventional technique for cooling the car battery is exemplified by Korean Patent No. 292222, in which polyethylene foam is interposed between electrolyte and the battery case such that the heat produced from the engine can be absorbed by the polyethylene foam.
  • Korean Patent Laid-Open Publication No. 1998-62965 discloses a technique for releasing the heat of the battery by providing plural cooling fins to the outer faces of the battery case, together with injection of cooling water into the case.
  • this approach leads to the complexity of the case structure and assembling procedures, thereby increasing the manufacturing cost. Disclosure
  • a battery case capable of being used in car batteries, particularly in 36V car batteries.
  • the battery case includes an electrolytic bath having an open top and a plurality of compartments, and a lid for covering the top of the electrolytic bath.
  • the compartments are defined by a central partition and a plurality of partitions arranged perpendicular to the central partition.
  • the electrolytic bath is provided with a plurality of vertical through-holes formed by the central partition for dissipating the heat and a transversal through-hole for dissipating the heat.
  • the vertical and transversal through- holes pass through the electrolytic bath in a vertical and transversal direction, respectively, and are inter-connected.
  • the lid is provided with a plurality of upper openings, the positions of which correspond to those of the vertical through-holes.
  • the battery case is placed on a tray and mounted in the engine room of vehicles.
  • a plurality of lower openings is formed on the tray, the positions of which correspond to those of the vertical through-holes.
  • the heat generated from the high-temperature electrolyte can be effectively dissipated in a vertical and transversal direction through a plurality of through-holes, which especially are structured to pass through the high temperature area of the battery. Therefore, the performance and lifespan of the batteries can be significantly improved.
  • the structure for heat-release may be integrally formed with the electrolytic bath, and thus separate parts for heat-dissipation are not required, thereby increasing productivity and reducing the manufacturing cost of the battery case. Description of Drawings
  • FIG. 1 is a perspective view showing the battery case according to one embodiment of the invention.
  • FIG. 2 is a top plan view showing an electrolytic bath of the battery case shown in Fig. 1;
  • FIG. 3 is a top plan showing a lid of the battery case according to one embodiment of the invention.
  • Fig. 4 depicts a tray for the use in the battery case of the invention
  • Fig. 5 is a graph showing the compared heat generation of the 36V batteries to which the battery case of the invention and the conventional case are applied, respectively;
  • Fig. 6 is a graph illustrating a method of accelerated lifespan test for the battery case of the invention and conventional art.
  • Fig. 7 shows the result of the test in Fig. 6. Best Mode
  • Fig. 1 illustrates a perspective view of a battery case according to one embodiment of the invention.
  • the battery case of the invention comprises an electrolytic bath 10 and a lid 30 for covering the upper portion of the electrolytic bath.
  • Fig. 2 is a top plan view of the battery case shown in Fig. 1.
  • the electrolytic bath 10 takes a box-shaped structure with the top thereof opened, for example, a rectangular box.
  • the inside of the electrolytic bath 10 is partitioned into plural compartments 16 by a central partition 12 and plural cell partitions 14 formed perpendicularly to the central partition 12.
  • eighteen (18) compartments are illustrated for the use in 36V batteries, but not limited thereto.
  • a group of electrode plates will be inserted into each compartment 16.
  • the battery case of this embodiment is provided with a plurality of vertical through-holes 20 formed by the central partition 12.
  • the through-holes 20 pass through the electrolytic bath 10 in a vertical direction such that the heat generated from the 36V battery can be effectively dissipated upwardly and downwardly through the vertical through-holes 20.
  • seven (7) through-holes are illustrated, but not limited thereto.
  • the battery case of the invention includes a transversal through-hole 22, which passes through the electrolytic bath 10 transversally and is inter-connected with the vertical through-holes 20. Therefore, the heat produced by the 36V battery can be effectively released horizontally through the transversal through-hole 22.
  • the electrolytic bath 10 is preferably integrally formed of synthetic resin, to enhance productivity due to a reduction in the molding and assembling time of the battery case.
  • Fig. 3 illustrates a top plan of the lid of the battery case according to one embodiment of the invention. As shown in Figs. 1 and 3, the lid 30 is provided with plural upper openings 32, the positions of which correspond to those of the vertical through-holes 20 such that the upward dissipation of the heat through the vertical through-holes 20 can be effectively carried out.
  • Fig. 4 depicts a tray 40 for the use in the battery case of the invention.
  • the battery is placed on the tray 40 and mounted in the engine room.
  • the tray 40 is provided with a plurality of lower openings 42, the positions of which correspond to those of the vertical through-holes. Therefore, the heat from the electrolytic bath 10 can be effectively released through the lower openings 42 downwardly via the vertical through-holes 20.
  • the temperature of the 36V battery will be increased due to the heat generated from the electrolyte filled in the electrolytic bath 10 during the charging/discharging of the battery.
  • the center portion of the bath 10 can rise up to around 80 ° C.
  • the heat from the electrolyte can be effectively dissipated in a vertical and transversal direction through the vertical through-holes 20 formed by the central partition 12, the transversal through-hole 22 formed perpendicularly to the vertical through-hole 20, and the upper openings 32 of the lid 30 and the lower openings 42 of the tray 40, both of which correspond to the vertical through-hole 20.
  • Fig. 5 is a graph showing a comparison between the heat generations of the 36V batteries to which the battery case of the invention and the conventional case are applied, respectively. As shown in Fig. 5, due to the effective discharge of the heat through the through-holes 20 and 22, the temperature of the center portion in the battery case of the invention has been found to be reduced to about 55 ° C, as compared to about 80 ° C in the conventional battery case.
  • Fig. 6 is a graph illustrating a method of accelerated lifespan test for the battery case of the invention and the conventional art.
  • the heat generated from the high-temperature electrolyte can be effectively dissipated in a vertical and transversal direction through a plurality of through-holes, which especially are structured to pass through the high temperature area of the battery. Therefore, the performance and lifespan of the batteries can be significantly improved.
  • the structure for heat-release may be integrally formed with the electrolytic bath, and thus separate parts for heat- dissipation are not required, thereby increasing productivity and reducing the manufacturing cost of the battery case.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Sustainable Development (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

A battery case for effectively dissipating the heat from 36V car batteries is disclosed. The battery case comprises an electrolytic bath having a plurality of compartments, and a lid covering the top of the electrolytic bath. The compartments are defined by a central partition and a plurality of cell partitions arranged perpendicular to the central partition. The electrolytic bath is provided with a plurality of vertical through-holes and a transversal through-hole for dissipating the heat. The vertical and transversal through-holes pass through the electrolytic bath in a vertical and transversal direction respectively, and are inter-connected. The lid is provided with a plurality of upper openings, the positions of which correspond to those of the vertical through-holes. The battery case is placed on a tray and mounted in the engine room of vehicles. A plurality of lower openings is formed on the tray, the positions of which correspond to those of the vertical through-holes.

Description

Description BATTERY CASE Technical Field
[1] The present invention relates generally to a battery case, particularly to a battery cases for effectively dissipating the heat generated from a 36V car-battery. Background Art
[2] In general, a 12V car-battery has a case including an electrolytic bath with its top opened and an upper lid covering the opened top. The electrolytic bath is partitioned into six compartments. Each compartment is filled with electrolyte and has a cell (a group of electrode plates) inserted therein. The car-battery A pair of terminals is connected to the cells. The car battery as structured above is placed on a tray and mounted in the engine room.
[3] However, the conventional 12V battery cannot supply enough electric power to effectively cope with a trend toward increased amount of consumed power due to an increase in the number of electronic equipment in the car and the higher grade in their quality and functions. Therefore, A 36V car-battery has been proposed, and the development and commercialization of 36V batteries have been extensively attempted. The 36V battery is structured to have eighteen cells connected in series, in contrast with the six cells in the conventional 12V-battery structure. Thus, as compared to the conventional 12V car-battery, the 36V car-battery can be easily heated up during charging and discharging thereof, due to the higher number of cells and their congregated structure. Particularly, the center portion of the 36V battery may be heated up to around 80 ° C, and thus the electrolyte filled therein is also heated likewise, thereby significantly deteriorating the performance and lifespan of the battery, along with danger of explosion.
[4] The conventional technique for cooling the car battery is exemplified by Korean Patent No. 292222, in which polyethylene foam is interposed between electrolyte and the battery case such that the heat produced from the engine can be absorbed by the polyethylene foam. With this technique in the prior art, the heat generated from the engine may be released, but dissipation of the heat caused by the electrolyte of high- temperature cannot be achieved. Also, Korean Patent Laid-Open Publication No. 1998-62965 discloses a technique for releasing the heat of the battery by providing plural cooling fins to the outer faces of the battery case, together with injection of cooling water into the case. However, this approach leads to the complexity of the case structure and assembling procedures, thereby increasing the manufacturing cost. Disclosure
[5] Therefore, it is an object of the invention to provide a battery case in which the heat generated from 36V car batteries can be effectively dissipated.
[6] To accomplish the above object, according to one aspect of the invention, there is provided a battery case capable of being used in car batteries, particularly in 36V car batteries. The battery case includes an electrolytic bath having an open top and a plurality of compartments, and a lid for covering the top of the electrolytic bath. The compartments are defined by a central partition and a plurality of partitions arranged perpendicular to the central partition. The electrolytic bath is provided with a plurality of vertical through-holes formed by the central partition for dissipating the heat and a transversal through-hole for dissipating the heat. The vertical and transversal through- holes pass through the electrolytic bath in a vertical and transversal direction, respectively, and are inter-connected. The lid is provided with a plurality of upper openings, the positions of which correspond to those of the vertical through-holes.
[7] Preferably, the battery case is placed on a tray and mounted in the engine room of vehicles. A plurality of lower openings is formed on the tray, the positions of which correspond to those of the vertical through-holes.
[8] According to the present invention, the heat generated from the high-temperature electrolyte can be effectively dissipated in a vertical and transversal direction through a plurality of through-holes, which especially are structured to pass through the high temperature area of the battery. Therefore, the performance and lifespan of the batteries can be significantly improved. The structure for heat-release may be integrally formed with the electrolytic bath, and thus separate parts for heat-dissipation are not required, thereby increasing productivity and reducing the manufacturing cost of the battery case. Description of Drawings
[9] Further objects and advantages of the invention can be more fully understood from the following detailed description taken in conjunction with the accompanying drawings in which:
[10] Fig. 1 is a perspective view showing the battery case according to one embodiment of the invention;
[11] Fig. 2 is a top plan view showing an electrolytic bath of the battery case shown in Fig. 1;
[12] Fig. 3 is a top plan showing a lid of the battery case according to one embodiment of the invention;
[13] Fig. 4 depicts a tray for the use in the battery case of the invention;
[14] Fig. 5 is a graph showing the compared heat generation of the 36V batteries to which the battery case of the invention and the conventional case are applied, respectively;
[15] Fig. 6 is a graph illustrating a method of accelerated lifespan test for the battery case of the invention and conventional art; and
[16] Fig. 7 shows the result of the test in Fig. 6. Best Mode
[17] Referring to the accompanying drawings, the embodiments according to the present invention are described in detail hereafter. The same reference numerals are used in different figures to denote similar or identical components.
[18] Fig. 1 illustrates a perspective view of a battery case according to one embodiment of the invention. As shown in Fig. 1, the battery case of the invention comprises an electrolytic bath 10 and a lid 30 for covering the upper portion of the electrolytic bath.
[19] Fig. 2 is a top plan view of the battery case shown in Fig. 1. As shown in Fig. 2, the electrolytic bath 10 takes a box-shaped structure with the top thereof opened, for example, a rectangular box. The inside of the electrolytic bath 10 is partitioned into plural compartments 16 by a central partition 12 and plural cell partitions 14 formed perpendicularly to the central partition 12. In this embodiment, eighteen (18) compartments are illustrated for the use in 36V batteries, but not limited thereto. A group of electrode plates will be inserted into each compartment 16.
[20] As shown in Fig. 2, the battery case of this embodiment is provided with a plurality of vertical through-holes 20 formed by the central partition 12. The through-holes 20 pass through the electrolytic bath 10 in a vertical direction such that the heat generated from the 36V battery can be effectively dissipated upwardly and downwardly through the vertical through-holes 20. In this embodiment, seven (7) through-holes are illustrated, but not limited thereto. As shown in Fig. 1, the battery case of the invention includes a transversal through-hole 22, which passes through the electrolytic bath 10 transversally and is inter-connected with the vertical through-holes 20. Therefore, the heat produced by the 36V battery can be effectively released horizontally through the transversal through-hole 22.
[21] According to the invention, the electrolytic bath 10 is preferably integrally formed of synthetic resin, to enhance productivity due to a reduction in the molding and assembling time of the battery case. [22] Fig. 3 illustrates a top plan of the lid of the battery case according to one embodiment of the invention. As shown in Figs. 1 and 3, the lid 30 is provided with plural upper openings 32, the positions of which correspond to those of the vertical through-holes 20 such that the upward dissipation of the heat through the vertical through-holes 20 can be effectively carried out.
[23] Fig. 4 depicts a tray 40 for the use in the battery case of the invention. The battery is placed on the tray 40 and mounted in the engine room. According to one embodiment of the invention, the tray 40 is provided with a plurality of lower openings 42, the positions of which correspond to those of the vertical through-holes. Therefore, the heat from the electrolytic bath 10 can be effectively released through the lower openings 42 downwardly via the vertical through-holes 20.
[24] The operation and advantages of the battery case of the invention will be described in detail below.
[25] As described above, the temperature of the 36V battery will be increased due to the heat generated from the electrolyte filled in the electrolytic bath 10 during the charging/discharging of the battery. Particularly, the center portion of the bath 10 can rise up to around 80 ° C. In the battery case of the present invention, however, the heat from the electrolyte can be effectively dissipated in a vertical and transversal direction through the vertical through-holes 20 formed by the central partition 12, the transversal through-hole 22 formed perpendicularly to the vertical through-hole 20, and the upper openings 32 of the lid 30 and the lower openings 42 of the tray 40, both of which correspond to the vertical through-hole 20.
[26] Fig. 5 is a graph showing a comparison between the heat generations of the 36V batteries to which the battery case of the invention and the conventional case are applied, respectively. As shown in Fig. 5, due to the effective discharge of the heat through the through-holes 20 and 22, the temperature of the center portion in the battery case of the invention has been found to be reduced to about 55 ° C, as compared to about 80 ° C in the conventional battery case.
[27] As described above, the battery case of the invention is able to significantly improve the lifespan of the battery by effectively dissipating the heat caused by the high temperature of the electrolytic bath, which adversely affects the lifespan of the batteries. Fig. 6 is a graph illustrating a method of accelerated lifespan test for the battery case of the invention and the conventional art.
[28] That is, an accelerated lifespan test of PSOC (Partial State of Charge) has been carried out in a simulation manner, applying the running test of the mild hybrid vehicle where the 36 battery and an internal combustion engine are mounted. Fig. 7 shows the result of the test in Fig. 6. As shown in Fig. 7, it has been found that the battery case of the invention makes a great contribution to improvement in the lifespan of the 36V batteries, i.e., more than 3 times the conventional batteries. Industrial Applicability
[29] As described above, according to the present invention, the heat generated from the high-temperature electrolyte can be effectively dissipated in a vertical and transversal direction through a plurality of through-holes, which especially are structured to pass through the high temperature area of the battery. Therefore, the performance and lifespan of the batteries can be significantly improved. The structure for heat-release may be integrally formed with the electrolytic bath, and thus separate parts for heat- dissipation are not required, thereby increasing productivity and reducing the manufacturing cost of the battery case.
[30] While the present invention has been described with reference to the particular illustrative embodiments, it is not to be restricted by the embodiments but only by the appended claims. It is to be appreciated that those skilled in the art can change or modify the embodiments without departing from the scope and spirit of the present invention.

Claims

Claims
[1] 1. A battery case comprising: an electrolytic bath having an open top and a plurality of compartments, the compartments being defined by a central partition and a plurality of cell partitions arranged perpendicular to the central partition; and a lid for covering the top of the electrolytic bath, wherein the electrolytic bath includes a plurality of vertical through-holes and a transversal through-hole for dissipating the heat generated from the electrolytic bath, the vertical through-holes being formed by the central partition and passing through the electrolytic bath vertically, the transversal through-hole passing through the electrolytic bath transversally and being connected with the vertical through-hole; and wherein the lid includes a plurality of upper openings formed thereon, the positions of the upper openings corresponding to those of the vertical through- holes.
[2] 2. A battery case according to claim 1, further comprising a tray where the battery case is placed and which is mounted in the engine room of vehicles, wherein a plurality of lower openings are formed on the tray, the positions of which correspond to those of the vertical through-holes of the electrolytic bath.
PCT/KR2004/001423 2004-05-08 2004-06-15 Battery case WO2005109545A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040032452A KR20050107169A (en) 2004-05-08 2004-05-08 Battery case
KR10-2004-0032452 2004-05-08

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WO2005109545A1 true WO2005109545A1 (en) 2005-11-17

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PCT/KR2004/001423 WO2005109545A1 (en) 2004-05-08 2004-06-15 Battery case

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Cited By (1)

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CN107256932A (en) * 2017-02-23 2017-10-17 吴华锋 A kind of electric automobile Power Supply Assembly

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Publication number Priority date Publication date Assignee Title
US8945746B2 (en) 2009-08-12 2015-02-03 Samsung Sdi Co., Ltd. Battery pack with improved heat dissipation efficiency
US20240234939A9 (en) * 2021-10-01 2024-07-11 Lg Energy Solution, Ltd. Battery module and battery pack comprising same
WO2023128394A1 (en) * 2021-12-27 2023-07-06 주식회사 엘지에너지솔루션 Cell unit and battery pack comprising same

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US5800942A (en) * 1995-10-24 1998-09-01 Matsushita Electric Industrial Co., Ltd. Storage battery with ventilation system
JP2002294226A (en) * 2001-04-02 2002-10-09 Sekisui Jushi Co Ltd Snow and ice-sliding coated matter
US20030013009A1 (en) * 2000-02-25 2003-01-16 Yoshitaka Dansui Battery pack

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US5800942A (en) * 1995-10-24 1998-09-01 Matsushita Electric Industrial Co., Ltd. Storage battery with ventilation system
US20030013009A1 (en) * 2000-02-25 2003-01-16 Yoshitaka Dansui Battery pack
JP2002294226A (en) * 2001-04-02 2002-10-09 Sekisui Jushi Co Ltd Snow and ice-sliding coated matter

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107256932A (en) * 2017-02-23 2017-10-17 吴华锋 A kind of electric automobile Power Supply Assembly

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