CN101488595B - Secondary battery module - Google Patents

Secondary battery module Download PDF

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Publication number
CN101488595B
CN101488595B CN2009100023214A CN200910002321A CN101488595B CN 101488595 B CN101488595 B CN 101488595B CN 2009100023214 A CN2009100023214 A CN 2009100023214A CN 200910002321 A CN200910002321 A CN 200910002321A CN 101488595 B CN101488595 B CN 101488595B
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China
Prior art keywords
battery
battery module
element cell
lower house
cell
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CN2009100023214A
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CN101488595A (en
Inventor
河真雄
金智浩
李汉浩
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Lg Energy Solution
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LG Chemical Co Ltd
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Priority claimed from KR1020040112596A external-priority patent/KR100897182B1/en
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Publication of CN101488595A publication Critical patent/CN101488595A/en
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    • 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
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/058—Construction or manufacture
    • H01M10/0585—Construction or manufacture of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators
    • 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
    • H01M50/105—Pouches or flexible bags
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • 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
    • H01M50/116—Primary casings; Jackets or wrappings characterised by the material
    • H01M50/124—Primary casings; Jackets or wrappings characterised by the material having a layered structure
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • 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
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • 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

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)

Abstract

Disclosed herein is a high-output, large-capacity secondary battery module, having a plurality of unit cells electrically connected to each other, for charging and discharging electricity. A plurality of unit cells are stacked one on another and mounted on a plate, preferably, between an upper case and a lower case, which are separated from each other, circuit units are continuously mounted at the side surfaces of the module for sensing the voltage, the current, and the temperature of the battery, controlling the battery, and interrupting electricity when overcurrent is generated, whereby the secondary battery module is constructed in a compact structure, design of the battery module is easily changed depending upon electrical capacity and output, and components of the battery module are stably mounted.

Description

Secondary battery module
The application is to be November 29, application number in 2005 the dividing an application for the application for a patent for invention of " secondary battery module " that be 200580041937.2 (international application no is PCT/KR2005/004033), denomination of invention the applying date.
Technical field
The present invention relates to high output, big capacity secondary battery module or group, this secondary battery module or group have plurality of unit cells electrically connected to each other, be used for charging and discharge, and relate more specifically to a kind of secondary battery module, wherein, a plurality of element cells pile up each other and install onboard, be preferably mounted between last shell and lower casing separated from one another, circuit unit is installed on the side of module in succession, be used to detect the voltage of battery, electric current and temperature, control battery and when generation during overcurrent, disconnect electric power, constitute secondary battery module with tight structure thus, can easily change the design of battery module and the parts that battery module stably is installed according to electric capacity and output.
Background technology
In recent years, the secondary cell that can discharge and recharge has been widely used as the energy that is used for wireless mobile apparatus.And, as the power supply that is used for electric motor car and hybrid electric vehicle, secondary cell has caused sizable concern, this electric motor car and hybrid electric vehicle be developed with solve by existing gasoline car that uses fossil fuel and diesel vehicle cause such as the air-polluting problem.Therefore, because the advantage of secondary cell uses the application type of secondary cell to increase, after this, the expectation secondary cell is applied to than more manying now in application and the product.
Because the application that secondary cell was suitable for and the kind of product increase, and also increase the kind of battery, so that battery can provide output and capacity corresponding to various application and product.In addition, need reduce to be applied to the size and the weight of the battery of application corresponding and product strongly.
For example, according to the minimizing of the size and the weight of corresponding product, one or more small sizes, lightweight battery are used for each equipment such as the small type mobile devices of mobile phone, personal digital assistant (PDAs), digital camera and laptop computer.On the other hand, because medium-sized or main equipment needs high output and big capacity, use such as the medium-sized or main equipment of electric bicycle, battery-operated motor cycle, electric motor car and hybrid electric vehicle to have the medium-sized or large-sized battery module (or medium-sized or large-sized battery pack) of a plurality of batteries that are electrically connected to each other.The size of battery module is directly related with corresponding spatial accommodation and output medium-sized or main equipment with weight.For this reason, manufacturer is just attempting making small size, lightweight battery module.In addition, stand a large amount of external impact and vibration such as stable electrical connection and physical connection between the parts of the equipment pattern of wants battery module of electric bike and electric motor car.In addition, use a plurality of batteries to realize high output and big capacity, therefore, think that the safety of battery module is very important.
Usually, by a plurality of element cells and electrical connecting unit battery are installed, make medium-sized or large-sized battery module in having the housing of preliminary dimension (shell).Can be used as element cell with rectangular secondary battery or the pouch-shaped secondary battery that high integration is piled up.Preferably, because bag shape battery is light and cheap, bag shape battery is usually as element cell.
Fig. 1 is the Typical Planar figure of the traditional bag shape battery 100 of example explanation.With reference to figure 1, a bag shape battery 100 comprises the electrode assemblie (not shown), and this electrode assemblie comprises with electrolyte and is installed in negative electrode, barrier film and anode in the bag shape housing 110 of the sealing of being made by aluminum laminate sheet.From electrode assemblie extension electrode tap, this electrode tap protrudes formation plate- shaped electrode terminals 120 and 130 from the upper end of battery.Alternatively, plate- shaped electrode terminals 120 and 130 can be made of the contact conductor that is connected to the electrode tap of protruding from the upper end of battery.
Yet,, when making battery module, produce several problems when above-mentioned battery is used as element cell.
Particularly, the mechanical strength of cell sheath (housing) is lower, therefore, is difficult to use the firm battery module of a plurality of this battery manufacturing structures.And battery itself does not comprise and is used to structure that battery is coupled to each other, therefore, needs other coupling member make battery module.
In conventional art, battery is installed in the battery case that can hold one to three battery, a plurality of battery cases pile up (accumulation) each other, and the battery case that piles up is installed in the module housing so that make battery module.In other words, use a plurality of battery cases and module housing manufacturing to comprise the battery module of a plurality of batteries.Therefore, increased the size of battery module, and the production process complicated that makes battery module.
And, be difficult to make bag plate-shaped electrode terminals of shape battery to be one another in series or in parallel the electrical connection.Therefore, it is complicated also to be used in the process of the electrical connection between electrode tip.Usually,, use lead, plate or bus, electrode tip is connected to each other by welding.For this reason, plate-shaped electrode terminals is local buckling, and by welding, and plate or bus are connected to the sweep of plate-shaped electrode terminals, and this needs masterful technique.And this connection procedure is very complicated.In addition, the coupling part may be owing to external impact and separated from one another, and this causes the quantity of substandard products to increase.
And as previously mentioned, in medium-sized or main equipment were used, owing to there is the multiple product that uses secondary cell, it was necessary that the various battery modules of corresponding electric capacity and output can be provided.In addition, even in the like products group, when the size of product not simultaneously, therefore corresponding electric capacity and export also differently, be necessary to change the design of battery module.
In having the housing of preliminary dimension (shell), hold a plurality of element cells, and element cell is electrically connected to each other, thereby construct traditional medium-sized or large secondary battery module.At the outer surface of housing, installation is used for voltage, electric current and the temperature of detecting unit battery and the circuit unit that is used to control battery.Yet the structure of this battery module has several problems.
At first, be difficult to increase or reduce the size of battery module according to the electric capacity of hope and output.The design cell battery is so that element cell is suitable for having the housing and the various parts that have corresponding to the structure of housing of preliminary dimension.Therefore, for example, when the adding device battery increases output, be necessary to change the entire cell Module Design.
In addition, be installed in the structure that housing various parts outer or that provide for electrical connection and lead are not configured to compactness (high density).Therefore, increase the size of battery module, and battery module does not provide the high security of opposing external impact.
Summary of the invention
Therefore, the objective of the invention is to avoid basically the problems referred to above of conventional art and the technical problem that requires in the past.
First purpose of the present invention provides a kind of battery module, wherein, according to required electric capacity and output, can be easy to increase or reduce the size of battery module, the lead that constitutes the parts of battery module and be used to be electrically connected constitutes compact structure, stably realizes simultaneously being electrically connected.
Second purpose of the present invention provides a kind of battery module, has tight structure and relative low intensive module housing even use, and this battery module also can provide the high security of opposing external impact.
According to the present invention, by a kind of high output, big capacity secondary battery module are provided, can realize above-mentioned and other purposes, this battery module has plurality of unit cells electrically connected to each other, be used for charging and discharge, wherein, battery module comprises: plate, on this plate, for chargeable a plurality of element cells with the secondary cell that discharges pile up mutually; And circuit unit, be used to control the work of battery.
Do not limit this plate especially, as long as this plate has the structure of stacked unit cells each other.This plate can be the housing that has corresponding to the accommodation section of the size of element cell, so that element cell can be easy to be installed in the accommodation section.Preferably, casing structure is a separated structures, in this structure, is covered the top and the bottom of the element cell that piles up respectively by the housing that separates.
In a preferred embodiment of the invention, secondary battery module comprises: be a plurality of element cells chargeable and secondary cell that discharges; Lower house, sequentially mutual thereon stacked unit cells, lower house has last accommodation section; Upper shell is used to cover the upper end of the element cell that piles up on the lower house, and upper shell has following accommodation section; First circuit unit is used for carrying out being electrically connected between the element cell that piles up, first circuit unit comprises the check-out console assembly, and this check-out console assembly is used to detect voltage, electric current and/or the temperature of battery; Be electrically connected to the second circuit unit of first circuit unit, this second circuit unit comprises the mainboard assembly that is used to control battery module; And the tertiary circuit unit that is electrically connected to the second circuit unit, the tertiary circuit unit also is connected to outside output, prevents from simultaneously to overcharge, overdischarge and/or overcurrent.
According to the width of battery module of the present invention and length width and the length less times greater than element cell, therefore, the overall dimensions of battery module is very little.Therefore, therefore the size of minimise battery module, is installed in battery module on the external equipment and device of using this battery module effectively.
Not special limiting unit battery is as long as element cell is a secondary cell chargeable and discharge.For example, lithium secondary battery, ni-mh (Ni-MH) battery, or NI-G (Ni-Cd) battery can be used as element cell.Preferably, lithium secondary battery is used as element cell, because lithium secondary battery provides high output-weight ratio.Based on their shape, lithium secondary battery is divided into cylindrical battery, rectangular battery and bag shape battery.Preferably, can be used as element cell with rectangular battery and the bag shape battery that high integration is piled up.More preferably, the bag shape battery that its weight is little is as element cell.
In a preferred embodiment of the invention, the upper shell of battery module and lower house are separated from one another.Therefore, when the electric capacity that changes battery module as required or when output, increase between upper shell and lower house or shift out element cell, the flexible design of battery module is possible thus.
The overall dimensions of upper shell and lower house is similar to the consistent size with element cell.Therefore, the consistent size of the main body of the following accommodation section of the upper shell of the last accommodation section of the lower house of accomodating unit battery and accomodating unit battery and element cell.
Preferably, between one of the top of the element cell that piles up and upper shell, arrange tabular, high strength safety member, so that settle safety member abreast with the battery lead plate of going up most element cell.
Relate to because the coming off and collide or of the battery module that external impact causes as the machine security of the serious problems in compactness and battery module light weight owing to the internal short-circuit in the element cell that causes of penetrating of needle-like conductor.When the direction along the battery lead plate of element cell applies external impact, seriously damage the fail safe of battery module.Therefore, during, high strength safety member tabular,, but increased mechanical safety widely even only increase the weight of battery module a little when in housing, arranging along the direction of the battery lead plate of element cell.
Safety member is preferably made by high-strength metal material, and is more preferably made by stainless steel.Preferably, the size of safety member is set so that safety member has surface area suitable with element cell and suitable thickness.When the thickness of safety member too hour, be difficult to provide required mechanical strength.On the other hand, when the thickness of safety member is too big, significantly increase the weight of battery module, this is not preferred.
In a preferred embodiment of the invention, between the element cell that piles up, place double-sided adhesive members.Element cell more stably piles up mutually and is fixed in the battery module by double-sided adhesive members.Double-sided adhesive members can be a two-sided tape.Yet double-sided adhesive members is not limited to two-sided tape.For example, two or more double-sided adhesive members can be placed in each and pile up on the face, make double-sided adhesive members be separated from each other.In this case, by double-sided adhesive members, between the element cell that piles up, form predetermined gap.When the charge or discharge element cell, the variation that the gap between the element cell that piles up is used for the absorptive unit volume of battery simultaneously, dissipates effectively by the heat of element cell generation.
Stacked unit cells makes the electrode tip of element cell be orientated along equidirectional each other.Preferably, each of element cell has plate-shaped electrode terminals, on electrode tip, form connecting through hole respectively, and by passing the fixed component that connecting through hole inserts, make upper shell and lower house fixed to one another, thus, realize being fixedly connected between element cell, simultaneously, the contact between the link of easily realizing being used to be electrically connected.
Plate-shaped electrode terminals is considered to have low mechanical strength.For this reason, plate-shaped electrode terminals need not act on the direct coupling arrangement of connection unit battery usually.In other words, as previously mentioned, battery is installed in the box usually, and a plurality of boxes are connected to each other to make battery module.Yet in a preferred embodiment of the invention, the plate-shaped electrode terminals that forms through hole on it directly is used for connecting battery.
Can construct electrode tip and make on a side of each battery and to form cathode terminal and anode tap, or on a side of each battery, form cathode terminal, and form anode tap at the opposite side of each battery.For example, can form cathode terminal and anode tap respectively, make cathode terminal and anode tap toward each other in the top and bottom of each battery.Electrode tip can be used for realizing because the conductivity that the electrochemical reaction of electrode assemblie causes by making such as the electric conducting material of aluminium, copper, nickel or its alloy.
In a preferred embodiment of the invention, battery module also comprises: be installed in the insulating component between the electrode tip of adjacent-cell battery, be used to realize the electric insulation between electrode tip, insulating component has the projection that is assemblied in the connecting through hole; And connecting elements, this connecting elements is connected to insulating component, is used to be one another in series or is electrically connected the electrode tip of the element cell that is connected to insulating component in parallel.
In this case, insulating component also is used for by projection connection electrode end mechanically.Preferably, each of projection has the through hole of interior diameter less than the interior diameter of the connecting through hole of electrode tip, and, between element cell, place insulating component simultaneously and pass the through hole insertion fixed component of projection, thereby element cell is connected to each other by stacked unit cells.
The details of insulating component and connecting elements has been described in the korean patent application No.2004-112590 that submits to the application's applicant's name.The disclosure of this application is introduced by reference at this.
In battery module according to the present invention, first circuit unit comprises: connecting elements is used to make element cell to be connected in parallel to each other or to be connected in series; And the check-out console assembly, be used to receive and detect voltage, electric current and temperature signal from each element cell.Preferably, the voltage and the temperature signal of the first circuit unit receiving element battery.Can measure temperature at check-out console assembly or mainboard assembly, as the bulk temperature of battery.First circuit unit is installed on the side with the electrode tip adjacent modules of element cell.
Do not limit the structure of connecting elements especially, as long as, be connected in serial or parallel with each other element cell by connecting elements.Preferably, attachment security member between connecting elements is used for when overcurrent or overheated the appearance interruptive current.Safety member can be fuse, bimetallic devices or positive temperature coefficient (PTC) element.
Preferably, the check-out console assembly is a printed circuit board (PCB), and it is electrically connected to each element cell.
The second circuit unit can be installed on the side with the electrode tip adjacent modules of element cell with first circuit unit.The second circuit unit also can be installed in the following accommodation section of lower house.Alternatively, the second circuit unit can be installed on the another side of module, makes the second circuit unit relative with first circuit unit.Preferably, the second circuit unit is installed in the following accommodation section of lower house.In this case, by first circuit unit, element cell is electrically connected to the second circuit unit in the following accommodation section that is installed in lower house.The work of the mainboard assembly control battery of second circuit unit.
When the charge or discharge battery, as be connected to external equipment be used to control overcharge, the tertiary circuit unit of last element of the module of overdischarge and/or overcurrent can be installed in a side with the electrode tip adjacent modules of element cell with first circuit unit.The tertiary circuit unit also can be installed in the following accommodation section of lower house.Alternatively, the tertiary circuit unit can be installed on the another side of module, make the tertiary circuit unit relative with first circuit unit.Preferably, the tertiary circuit unit is installed on the another side of module, makes the tertiary circuit unit relative with first circuit unit.
Circuit unit can partly or wholly constitute combining structure.Most preferably, the second circuit unit is installed in the following accommodation section of lower house, and the tertiary circuit unit is installed on the another side of module, makes the tertiary circuit unit relative with first circuit unit.In this case, be used for the circuit unit of actuating battery to be connected to each other, make circuit unit surround ground battery module, therefore, reduced the overall dimensions of battery module widely according to the present invention.
In a preferred embodiment of the invention, the tertiary circuit unit comprises switchboard, and this switchboard comprises: switch element, be used to control the charging and the discharge of secondary battery module, and the heat radiating fin structure that is connected to switch element.Preferably, switchboard is the printed circuit board (PCB) (PCB) that comprises interlock circuit.
Switch element and the element cell that constitutes battery module are connected in series and are used for controlling electric current in the battery.Switch element also is connected to protective circuit, is used to detect the voltage and/or the electric current of battery, so that the control switch element.Special limit switch element is as long as switch element control is overcharged, overdischarge or overcurrent.For example, field-effect transistor (FET) element or transistor can be used as switch element.Preferably, the FET element is as switch element.
The switch element of charging purpose is the switch element that is used to control the charged state of battery, and the switch element of discharge purpose is the switch element that is used to control the discharge condition of battery.Usually, the switch element of battery module comprises charging purpose switch element and discharge purpose switch element.
Switch element is connected to control circuit, is used to detect the voltage of battery and/or electric current so that the control switch element.According to the signal from control circuit output, the control switch element opens or closes.Particularly, control circuit maintains out state with switch element (charging purpose switch element and discharge purpose switch element).On the other hand, when when rechargeable battery abnormality occurs therebetween, charging purpose switch element is disconnected so that interrupt charging current.When during discharge battery, abnormality occurring, disconnect discharge purpose switch element, so that interrupt discharging current.And during rechargeable battery, when the voltage of battery exceeded predetermined maximum voltage, control circuit output was used to disconnect charging purpose switch element to prevent the signal that overcharges of battery.On the other hand, during discharge battery, when the voltage of battery is reduced to when being lower than predetermined minimum voltage, control circuit output is used to disconnect discharge purpose switch element to prevent the signal of battery over-discharge.Outlet side short circuit when battery, therefore and when overcurrent flows in battery, or when high charging voltage being applied to battery owing to the abnormal operation of battery, therefore and when overcurrent flows in battery, control circuit detects the overcurrent that flows in the battery, and output is used for the signal of cut-off switch element.The control circuit of control switch element is included in printed circuit board (PCB) or the other circuit member.
Preferably be used in according to battery module of the present invention and have in high output and the jumbo medium-sized or large-sized battery system.Restriction is not high especially exports and jumbo scope.
For example, can comprise the power supply that is used for such as the vehicle of electric bike (e-bikes), battery-operated motor cycle, electric motor car or hybrid electric vehicle with the power supply that acts on various application and product according to battery module of the present invention.Because battery module configurations becomes tight structure, thereby more preferably, use the power supply that acts on electric bike according to battery module according to the present invention.
Description of drawings
From following detailed description in conjunction with the accompanying drawings, will more be expressly understood above-mentioned and other purposes, feature and other advantages of the present invention, wherein:
Fig. 1 is the Typical Planar figure of the traditional bag shape battery of example explanation;
Fig. 2 and 3 is typical perspective view and typical end views of example explanation battery module according to a preferred embodiment of the invention respectively;
Fig. 4 is the exemplary view of piling up of the element cell on the lower casing of example explanation battery module shown in Figure 2;
Fig. 5 is the perspective view of lower surface of the lower casing of example explanation battery module shown in Figure 2; And
Fig. 6 is the perspective view of lower surface of the last shell of example explanation battery module shown in Figure 2.
Embodiment
Now, with reference to the accompanying drawings, the preferred embodiment of the present invention will be described in detail.Yet, it should be noted that scope of the present invention is not limited by illustrated embodiment.
Fig. 2 and 3 is typical perspective view and typical end views of example explanation battery module 1000 according to a preferred embodiment of the invention respectively.
With reference to figure 2 and 3, battery module 1000 comprises upper shell 200, lower house 300, a plurality of element cell 100, first circuit unit 400, second circuit unit (not shown) and tertiary circuit unit 500.Element cell 100 is stacked between the upper shell 200 and lower house 300 that is separated from each other.First circuit unit 400 is installed on the front surface of battery module 1000, and the second circuit unit is installed in the lower surface of battery module 1000, and tertiary circuit unit 500 is installed in the rear surface of battery module 1000.
Because upper shell 200 and lower house 300 are separated from one another, thereby the quantity of stackable each other element cell 100 is not subjected to upper shell 200 and lower house 300 restrictions.Therefore, can be easy to design battery module 1000, so that,, make battery module 1000 have required electric capacity and output by revising first circuit unit 400 and tertiary circuit unit 500 according to the quantity of the element cell 100 that piles up.And therefore exposure unit battery 100, in charge or discharge element cell 100, realizes heat radiation effectively.
Fig. 4 is the element cell of the battery module shown in the example key diagram 2 and the perspective view of lower house, and Fig. 5 is the perspective view of the lower surface of example explanation lower house that the second circuit unit is installed.
At first with reference to figure 4, lower house 300 is the structural elements with almost identical with the outward appearance of element cell 100 outward appearance.Lower casing 300 comprises the last accommodation section 301 of accomodating unit battery 100.Preferably, lower house 300 is made by the plastic resin such as acrylonitrile-butadiene-styrene (ABS), Merlon (PC) or polybutylene terephthalate (PBT) (PBT) with high strength and electric insulation.
The element cell 100 that is stacked on the lower house 300 is pouch-shaped secondary batteries, has the cathode terminal 120 and the anode tap 130 that protrude from the upper end of battery body 110.On electrode tip 120 and 130, form connecting through hole 140 respectively.When element cell 100 and 101 is in stacked state, fixing hole 302 by connecting through hole 140 and formation in lower house 300, insert other fixed component, for example securing member 700, then below lower house 300, therefore assembling nut (not shown) on securing member 700, makes element cell 101 and 101 fixed to one another.
Insulating component 600 is installed between the electrode tip 120,130 of the electrode tip 120,130 of element cell 100 and element cell 101, is used to realize the electric insulation between element cell 100 and 101.Form projection 610 on insulating component 600, this projection 610 is assemblied in the connecting through hole 140 of electrode tip 120 and 130.Also form through hole 620 at protruding 610 places, therefore, securing member 700 that the through hole 620 by protruding 610 inserts and the electric insulation between electrode tip 120 and 130 are held.Although not shown in this Figure, under the situation that comprises insulating component 600, can be by the electrical connection between the other connecting elements (not shown) realization electrode tip.As previously mentioned, described the details of insulating component and connecting elements in the korean patent application No.2004-112590 that submits to the application's applicant's name, the disclosure of this application is incorporated by reference here.
And two- sided tape 800 and 801 is connected to the battery body 110 of element cell 100, guarantees the element cell 100 pile up and 101 more stable connection thus.In addition, element cell 100 that piles up and 101 thickness with two- sided tape 800 and 801 are separated from each other.When element cell 100 and 101 charge or discharge, element cell 100 that piles up and 101 gap are used for the variation of volume of absorptive unit battery 100 and 101, and are used for dissipating effectively by element cell 100 and 101 heats that produce.
As shown in Figure 5, lower house 300 has the following accommodation section 310 that second circuit 330 is installed at its lower surface place.Second circuit 330 comprises and is used to realize the negative electrode of main terminal (not shown) and the electric wire 320 and 322 of the conductivity between anode. Electric wire 320 and 322 is connected to the tertiary circuit unit.And second circuit 330 comprises electric wire 332 and 334, and this electric wire 332 and 334 is electrically connected to the check-out console assembly 410 of first circuit unit 400 and tertiary circuit unit respectively.
Fig. 6 is the lower surface of upper shell of example explanation battery module shown in Figure 2 and the perspective view of safety member that is connected to the lower surface of upper shell.
With reference to figure 6, upper shell 200 can be made by the insulating component identical with lower house or another insulating component that is different from lower house.Preferably, upper shell 200 is made by plastic resin.
Upper shell 200 has following accommodation section 201, and this time accommodation section 201 has and the suitable size of element cell 100 (see figure 2)s, makes the upper end of going up element cell 100 most be contained in down in the accommodation section 201.And upper shell 200 has hole 202, and this hole 202 is corresponding to the through hole of the electrode tip of element cell.
At the following accommodation section of upper shell 200 201 upper mounting plate shape safety members 900.Safety member 900 has almost identical with element cell size.Safety member 900 is arranged to parallel with the battery lead plate of units corresponding battery.
Although be the example purpose, the preferred embodiments of the present invention are disclosed, it is possible those skilled in the art will recognize various improvement, increase and substituting, and does not deviate from as disclosed scope and spirit of the present invention in claims.
Industrial usability
As obviously visible from foregoing description, based on required electric capacity and output, can easily increase or reduce the size according to secondary cell module of the present invention. And, consist of the parts of battery module and the lead of the parts that are connected battery module and be arranged to compact structure. In addition, secondary cell module according to the present invention has high security for the outside bump. Therefore, the present invention has the effect that realizes stable electrical connection.

Claims (3)

1. a high output, jumbo secondary battery module have plurality of unit cells electrically connected to each other, are used for charging and discharge, and wherein, this battery module comprises:
Lower house sequentially piles up described element cell on described lower house, described lower house has last accommodation section;
Upper shell, described upper shell is used to cover the upper end of the described element cell that piles up on the described lower house, and described upper shell has following accommodation section; And
Circuit unit is used to control the work of this battery module, wherein,
Each of described element cell has plate-shaped electrode terminals, forms connecting through hole on this plate-shaped electrode terminals respectively;
Described upper shell and described lower house are fixed to one another by fixed component, and this fixed component passes described connecting through hole and inserts, and
The consistent size of the following accommodation section of the last accommodation section of the lower house of accomodating unit battery and the upper shell of accomodating unit battery and the main body of element cell.
2. battery module as claimed in claim 1 also comprises:
Insulating component, this insulating component is installed between the electrode tip of adjacent-cell battery, is used to realize the electric insulation between this electrode tip, and this insulating component has the projection that is assemblied in the described connecting through hole; And
Connecting elements is connected to this insulating component, and the electrode tip that is used for being connected to the element cell of this insulating component is electrically connected in series or in parallel mutually.
3. battery module as claimed in claim 2, wherein,
Each projection has through hole, and its interior diameter is less than the interior diameter of the connecting through hole of described electrode tip, and
By piling up described element cell, between described element cell, arrange described insulating component simultaneously, and insert fixed component, thereby described element cell is connected to each other by the described through hole of described projection.
CN2009100023214A 2004-12-24 2005-11-29 Secondary battery module Active CN101488595B (en)

Applications Claiming Priority (6)

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KR1020040112596 2004-12-24
KR1020040112589A KR100875606B1 (en) 2004-12-24 2004-12-24 Secondary battery module
KR10-2004-0112589 2004-12-24
KR1020040112589 2004-12-24
KR10-2004-0112596 2004-12-24
KR1020040112596A KR100897182B1 (en) 2004-12-24 2004-12-24 Secondary Battery Module of Improved Stability

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CN101488595A (en) 2009-07-22

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