CN100573973C - Battery component - Google Patents
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- CN100573973C CN100573973C CNB2006100739396A CN200610073939A CN100573973C CN 100573973 C CN100573973 C CN 100573973C CN B2006100739396 A CNB2006100739396 A CN B2006100739396A CN 200610073939 A CN200610073939 A CN 200610073939A CN 100573973 C CN100573973 C CN 100573973C
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- battery component
- top cover
- pressure part
- case member
- cell device
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- 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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Abstract
The invention discloses the battery component of a kind of box-like or plate shape.This battery component has cell device, lid and the circuit board of hard outer jacket member, box-like or plate shape.Hard outer jacket member is formed with first opening and second opening at two ends.The cell device of box-like or plate shape is contained in the case member and has electrode terminal.Lid forms and is installed to first opening by resin molded.Circuit board is connected with electrode terminal leads and is contained in the lid.At least electrode terminal leads is extended from first opening.Cover at the two ends of a longer sides and have concave portions.Case member has the notch portion that the concave portions that makes lid is at least exposed.The longer sides of described at least lid and case member hot adhesion.
Description
Technical field
The present invention relates to a kind of battery component (battery pack), wherein cell device is coated with case member (outer jacket member).
Background technology
In recent years, along with the extensive use of portable electron device such as subnotebook PC, mobile phone and PDA(Personal Digital Assistant), high voltage, high-energy-density and light-duty lithium ion battery be widely used in the power supply of these electronic installations.
When battery used liquid electrolyte, the problem that liquid electrolyte is easy to leak into outside batteries can take place.In order to address this problem, in fact used polymer to be soaked in the lithium ion polymer secondary cell of the gel-type polymer film in the non-aqueous electrolytic solution and the lithium ion polymer secondary cell of use solid electrolyte.
Lithium ion polymer secondary cell has unit (cell) structure.Element cell is made of the cell device and the case member of pressing material to make by aluminium lamination.Cell device is made of negative electrode, anode and polymer dielectric.Cell device has from the electrode terminal of negative electrode and anode extension.Cell device is coated with case member.The wiring plate that circuit part is installed on element cell and its is contained in the box-like mold housing of being made up of upper body and lower case.Following patent documentation 1 has been described the example of this lithium ion polymer secondary cell.
[patent documentation 1]
Japanese Patent Application Laid-Open No.2002-260608.
Summary of the invention
Be contained in the molding outer casing in this prior art constructions at cell device, the wall thickness of molding outer casing for about 0.3mm to 0.4mm.When considering fixed double-sided adhesive tape and tolerance, element thickness increases about 0.8mm to 1mm.In addition, need make the top molding outer casing of unit and the shape that the bottom molding outer casing can carry out ultra-sonic welded.For like this, wall thickness increases about 0.7mm.Thereby, to compare with the volume of unit, the volume of battery component increases by 1.3 to 1.4 times.
In addition, when battery unit is contained in the molding outer casing, the heat-sinking capability variation.Thereby battery performance reduces and/or the generation heat.
In order to address this is that, the inventor of present patent application has proposed a kind of battery component with following structure.This battery component is made of hard outer jacket member (hard outer jacket member) and cell device.Hard outer jacket member has first opening and second opening at two ends.Cell device is contained in the case member.Be respectively installed to first opening and second opening by resin molded first lid that forms and second lid.Circuit board is contained in first lid that is installed to first opening.Circuit board has the electrode terminal that is connected to cell device.
Because this battery component has excellent volumetric efficiency (electric capacity of per unit volume/one battery component) and high-cooling property, so this battery component helps to improve battery performance.In addition, can easily assemble this battery component and can realize high yield.Yet because the simple shape of battery component, the inventor recognizes the danger that exists battery component to be connected with the electronic installation reversed polarity.In order to address this problem, can add jut at the edge surface place of battery component.Yet this jut branch reduces the volumetric efficiency of battery component.
In addition, when using above-mentioned battery component because simple in structure, institute so that battery component to avoid external impact very important.In having the battery component of said structure, shown in Figure 1A, 101a carries out spinning molded (spin-molding) to soft shell parts (soft outer jacket member), holds the concave portions of cell device with formation.After cell device is contained in the concave portions, hard outer jacket member 101b is placed on the soft shell parts 101a, make hard outer jacket member 101b cover the opening portion of concave portions.Periphery to cell device carries out hot adhesion.After this, shown in Figure 1B, folding hard outer jacket member 101b and soft shell parts 101a.Thereby resulting structure has elliptic cross-section.The end of bonding case member 101a and 101b.Thereby, obtain battery unit.Lid with elliptic cross-section is installed to the opening of battery unit top and bottom.Thereby, obtain battery component.
Yet, as shown in Figure 2, in having the battery component of this structure, hard outer jacket member 101b and soft shell parts 101a fold along left-hand face part that is connected cell device 104 and right lateral surface part and the straight line that holds the opening portion of cell device 104.Thereby the radius of curvature of these folded parts is less than the radius of curvature of the part of the lower surface part of the left-hand face part that connects cell device 104 and right lateral surface part and cell device 104.Thereby the cross section of cell device 104 is not oval-shaped.
This is because holding the concave portions of cell device 104 forms by spinning is molded, and the end 108 of concave portions can easily fold.When the lid of attempting to have the substantially elliptical cross section was installed to the opening portion of cell device 104, the shape of hard outer jacket member 101b and described lid did not match.Because their contact reduces, so they can not carry out hot adhesion fully.Thereby when applying impact on the battery component Crater plate or to battery component, hard outer jacket member 101b can come off easily.
Another problem of above-mentioned battery component is, when battery component is designed to have elliptic cross-section, because side surface is crooked, aims at the battery component socket portion of electronic installation so battery component is difficult.In addition, after battery component is received electronic installation, the easy and socket portion disengaging of battery component.
In above-mentioned battery component, circuit board 103 is contained in the top cover 102 that is made of upper bracket 102a and lower bracket 102b.Top cover 102 is installed to an opening portion of case member 101.At this moment, shown in Fig. 3 A and 3B, the electrode terminal 105 that is connected to circuit board 103 folds and is contained in the battery component.In this case, when having enough spaces between cell device 104 and the top cover 102, the electrode terminal of folding up 105 does not hinder relative with electrode terminal leads part and is arranged in the part 109 of upper bracket 102a.Yet this structure contradicts with this basic purpose of battery component of the high volumetric efficiency of design.
When the space between cell device 104 and the top cover 102 was narrower, because the structure of electrode terminal leads part, the electrode terminal leads part that places upper bracket 102a just became very little with the hot adhesion part of case member 101.Thereby it is not enough that the hot adhesion intensity between top cover 102 and the case member 101 becomes.In addition, when cell thickness relatively hour, shown in Fig. 3 B, part 110 relative with the electrode terminal leads part and that be positioned on the basal surface of lower bracket 102b is pushed electrode terminals 105.Thereby electrode terminal is outstanding and folding at the thickness direction of cell device.Thereby the thickness of electrode terminal part becomes thicker than other parts.In this case, battery component may not match with the battery component slot of electronic installation.
In addition, the inventor of present patent application proposes a kind of battery component, and its structure is identical with above-mentioned battery component, just thermoplastic resin etc. is injected in first lid, thereby fixedly is contained in wherein circuit board.
Yet in this battery component, resin is not injected in first lid fully and this lid has cavity.Thereby circuit board is not fixed fully.When on the battery component Crater plate, circuit board deforms.Sometimes circuit is impaired.
Consider above-mentionedly, expectation provides a kind of like this battery component, and it can prevent and install reversed polarity and is connected, and can be not cost with the reduction volumetric efficiency.
In addition, expectation provides a kind of battery component, and it has excellent volumetric efficiency and external impact resistance, and can easily aim at the battery component slot.
In addition, expectation provides a kind of battery component, and it makes electrode terminal avoid being subjected to the interference of top cover, and need not to make electrode terminal outstanding and crooked, and can not make the thickness of electrode terminal part become bigger than the other parts of battery component, and can productivity gain.
In addition, expectation provides a kind of battery component, and it is injected in the lid of holding circuit plate thermoplastic resin fully, and the resin that makes injection holding circuit plate reliably, and improves the mechanical strength of battery component.
According to embodiments of the invention, the battery component of a kind of box-like or plate shape is provided, it has cell device, lid and the circuit board of hard outer jacket member, box-like or plate shape.Hard outer jacket member has first opening and second opening that is formed on two ends.The cell device of box-like or plate shape is contained in the case member and has electrode terminal.Lid is formed by resin molded, and is installed to first opening.Circuit board is connected with electrode terminal leads (electrode terminal lead) and is contained in the lid.At least electrode terminal leads is extended from first opening.Cover at the two ends of a longer sides and have concave portions.Case member has the notch portion (cut portion) that the concave portions that makes lid is at least exposed.At least Gai longer sides and case member hot adhesion.
According to embodiments of the invention, a kind of battery component is provided, it has case member, cell device and lid that at least one is resin molded.Case member is made of ground floor pressure part and second layer pressure part.The ground floor pressure part has concave portions.Cell device is contained in the concave portions that forms in the ground floor pressure part.Ground floor pressure part and second layer pressure part are stacked, make second layer pressure part cover the opening of concave portions.The open circumferential of sealing ground floor pressure part.The two ends of second layer pressure part connect in the bottom outside of the concave portions of ground floor pressure part.The tab-like substantially elliptical that becomes in the both sides of second layer pressure part.At least one resin molded lid is installed to the opening portion that is formed by case member.Two at lid form corner part (corner portion) on than minor face.From the opening of the concave portions of ground floor pressure part to each than the radius of curvature of the corner part of the curved surface of minor face less than from the outer surface of the bottom of the concave portions of ground floor pressure part to each radius of curvature than the turning of the curved surface of minor face.
According to embodiments of the invention, the battery component of a kind of box-like or plate shape is provided, it has cell device, first lid and second lid of hard outer jacket member, box-like or plate shape.Hard outer jacket member has first opening and second opening at two ends.The cell device of box-like or plate shape is contained in the case member, and has the electrode terminal leads that is connected with circuit board.First lid and second lid cover first opening and second opening.First lid is installed to first opening.Circuit board is contained in first lid.First lid has upper bracket and a lower bracket at least, and upper bracket is formed and at the opposite side holding circuit plate of cell device by resin molded, and lower bracket is formed and at cell device side holding circuit plate by resin molded.Upper bracket and lower bracket bonding or mechanical connection.Upper bracket has the corresponding notch portion of electrode terminal leads part with the electrode terminal that extends from cell device.
According to embodiments of the invention, the battery component of a kind of box-like or plate shape is provided, it has cell device, first lid and second lid of hard outer jacket member, box-like or plate shape.Hard outer jacket member has first opening and second opening at two ends.The cell device of box-like or plate shape is contained in the case member, and has the electrode terminal leads that is connected to circuit board.First lid and second lid cover first opening and second opening.First lid is installed to first opening.Circuit board is contained in first lid.First lid has upper bracket and a lower bracket at least, and upper bracket is formed and at the opposite side holding circuit plate of cell device by resin molded, and lower bracket is formed and at cell device side holding circuit plate by resin molded.Upper bracket and lower bracket bonding or mechanical connection.Upper bracket has through hole, and resin is injected in the space that forms between the cell device and first lid by this through hole.Lower bracket has jut at two ends, and described jut has notch portion at core, and lower bracket has at least one in the side-prominent base plate supports projection of circuit substrate near core.Resin is injected in the space that forms between the cell device and first lid.
Preferably, the opening of an end of case member by being installed to lid goes out the thickness of lid approximately from a distal process of cell device.Preferably, the hot adhesion layer is arranged in the jut of case member.
Preferably, case member is made of ground floor pressure part with approximate same size and second layer pressure part.Preferably, the ground floor pressure part has the concave portions of holding cell device, stacked ground floor pressure part and second layer pressure part, make second layer compressing tablet parts cover the opening of concave portions, the open circumferential sealing of ground floor pressure part, the electrode terminal leads that is connected to cell device is extended from hermetic unit, the end of ground floor pressure part and second layer pressure part is connected in the bottom outside of the concave portions of ground floor pressure part, the tab-like ellipse that becomes in the both sides of ground floor pressure part and second layer pressure part.
As mentioned above,, cover at the two ends of a longer sides and have concave portions, and case member has the notch portion that the concave portions that makes lid is at least exposed according to embodiments of the invention.Thereby, the battery component with excellent volumetric efficiency can be provided, this battery component has the structure that prevents that the battery component reversed polarity from connecting.
In addition, according to another embodiment of the invention, because the contact of the lid and the mounting portion of case member is improved, so can avoid hot adhesion partly to come off.Thereby, when battery component falls or be subjected to impacting, can avoid battery component to be damaged.In addition, owing to battery component can easily be aimed at the battery component slot of electronic installation, and can avoid battery component and the dislocation of battery component slot, so can improve the quality of battery component.
In addition, according to another embodiment of the invention, because the lid of containment circuit board has notch portion, so when lid was installed to case member, notch portion can be held crooked electrode terminal.Thereby after lid and case member hot adhesion, the thickness of battery component can not increase.In addition, owing to avoided hot adhesion partly to come off, so improved the quality of battery component.
In addition, according to embodiments of the invention, owing to used the support that can not stop the resin flows of injection, resin can be injected in the top cover fully, reliably the holding circuit plate.In addition, can improve the mechanical strength of battery component.
In addition, according to the present invention since the rib at lower bracket two ends battery component vertically have a jut, so when the injection resin, can simplify resin flow.Thereby resin can be injected in the top cover fully.
In addition, according to another embodiment of the present invention, because lower bracket has jut, so when upper bracket and lower bracket are installed, because through hole is relative with jut, so even metallic pin is inserted in the through hole, also can avoid metallic pin to contact with cell device.Thereby, can avoid taking place accident such as short circuit.
According to the detailed description of following most preferred embodiment of the present invention as shown in drawings, it is more apparent that these and other objects of the present invention, feature and benefit will become.
Description of drawings
From the detailed description below in conjunction with accompanying drawing the present invention is more comprehensively understood, identical Reference numeral is represented identical parts in the accompanying drawing, in the accompanying drawing:
Figure 1A and Figure 1B are the sectional views of structure that the battery unit of prior art is shown;
Fig. 2 is the schematic diagram of structure that the battery unit of prior art is shown;
Fig. 3 A and Fig. 3 B are the sectional views of structure that the battery unit of prior art is shown;
Fig. 4 is the decomposition diagram that illustrates according to the example of the structure of the battery component of first embodiment of the invention;
Fig. 5 is the perspective view that illustrates according to the example of the shape of battery component one end of first embodiment of the invention;
Fig. 6 A and Fig. 6 B are respectively perspective view and the sectional views that illustrates according to the example of the structure of the cell device of first embodiment of the invention;
Fig. 7 A, Fig. 7 B and Fig. 7 C be plane graph that first example of case member is shown, than minor face sectional view and longer sides sectional view;
Fig. 8 is the sectional view of example that the structure of the flexible laminated parts that constitute case member is shown;
Fig. 9 is the perspective view that second example of case member is shown;
Figure 10 is the perspective view of example that the shape of upper bracket is shown;
Figure 11 is the perspective view of example that the outward appearance of the cell device that is coated with case member is shown;
Figure 12 is the amplification sectional view that the case member that coats cell device is shown;
Figure 13 is the perspective view of description according to the production method of the battery component of first embodiment of the invention;
Figure 14 is the perspective view of description according to the production method of the battery component of first embodiment of the invention;
Figure 15 is the perspective view of description according to the production method of the battery component of first embodiment of the invention;
Figure 16 is the perspective view of description according to the production method of the battery component of first embodiment of the invention;
Figure 17 is the perspective view of description according to the production method of the battery component of first embodiment of the invention;
Figure 18 is the perspective view that illustrates according to the external shape of the battery component of first embodiment of the invention;
Figure 19 is the perspective view that illustrates according to the external shape of the battery component of first comparative example;
Figure 20 is the perspective view that illustrates according to the external shape of the battery component of second comparative example;
Figure 21 is the perspective view that illustrates according to the external shape of the battery component of the 3rd comparative example;
Figure 22 is the schematic diagram that illustrates according to the structure of the battery component of second embodiment of the invention;
Figure 23 is the schematic diagram of the cap structure that uses in the battery component that illustrates according to second embodiment of the invention;
Figure 24 illustrates the schematic diagram that the top cover of producing according to second embodiment of the invention is installed to the state of battery unit;
Figure 25 illustrates the schematic diagram that the top cover of producing according to second embodiment of the invention is installed to the state of battery unit;
Figure 26 illustrates the schematic diagram that the top cover of producing according to second embodiment of the invention is installed to the state of battery unit;
Figure 27 A, Figure 27 B and Figure 27 C are perspective view, front view and the perspective views that the top cover of producing according to second embodiment of the invention is shown;
Figure 28 is the schematic diagram that the structure of battery component of the prior art is shown;
Figure 29 is the schematic diagram that the structure of the top cover that is used in the battery component of the prior art and battery unit is shown;
Figure 30 illustrates the perspective view that is used in according to the structure of the upper bracket of the top cover in the battery component of third embodiment of the invention;
Figure 31 is the perspective view that illustrates according to the example of the structure of the battery component of third embodiment of the invention;
Figure 32 is that the top cover that uses in the battery component that is illustrated in according to third embodiment of the invention is installed in the state of battery unit, the plane graph of the electrode terminal leads of battery unit part;
Figure 33 is the schematic diagram of structure of the lower bracket of the formation top cover that uses in the battery component that illustrates according to third embodiment of the invention;
Figure 34 A and Figure 34 B are the perspective views that illustrates according to the wiring of the electrode terminal in the battery component of third embodiment of the invention;
Figure 35 is the perspective view of the structure of upper bracket, lower bracket and battery unit according to third embodiment of the invention;
Figure 36 illustrates the perspective view that the top cover of producing according to third embodiment of the invention is installed to the state of battery unit;
Figure 37 illustrates the perspective view that the top cover of producing according to third embodiment of the invention is installed to the state of battery unit;
Figure 38 illustrates the perspective view that the top cover of producing according to third embodiment of the invention is installed to the state of battery unit;
Figure 39 A, Figure 39 B, Figure 39 C and Figure 39 D illustrate the sectional view that the top cover of producing according to third embodiment of the invention is installed to the state of battery unit;
Figure 40 illustrates the perspective view that is installed to the state of battery unit according to the upper bracket of fourth embodiment of the invention;
Figure 41 is the perspective view that illustrates according to first example of the lower bracket of fourth embodiment of the invention;
Figure 42 illustrates according to the upper bracket of invention the 4th embodiment and the perspective view of the mounted state of lower bracket;
Figure 43 illustrates according to the upper bracket of fourth embodiment of the invention and the enlarged detail view of lower bracket mounting portion;
Figure 44 is the perspective view that the state in the opening of the end face that upper bracket and lower bracket according to fourth embodiment of the invention be inserted into battery unit is shown;
Figure 45 is the perspective view that illustrates according to second example of the lower bracket of fourth embodiment of the invention;
Figure 46 is the perspective view that illustrates according to the 3rd example of the lower bracket of fourth embodiment of the invention;
Figure 47 is under the upper bracket and the mounted state of lower bracket that illustrates according to fourth embodiment of the invention, near the enlarged perspective the through hole of lower bracket;
Figure 48 is the perspective view according to the example of the shape of the lower bracket of fourth embodiment of the invention;
Figure 49 is the perspective view of example that the shape of the lower bracket of using in the battery component of prior art is shown;
Figure 50 is the perspective view of example that the shape of the lower bracket with a plurality of circuit board supporting projections is shown.
Embodiment
Next, describe the first embodiment of the present invention with reference to the accompanying drawings.Fig. 4 is the decomposition diagram that illustrates according to the example of the structure of the battery component of first embodiment of the invention.Fig. 5 is the perspective view that illustrates according to the example of the shape of battery component one end of first embodiment of the invention.Battery component is the battery component of box-like or plate shape lithium ion polymer battery.As shown in Figure 4, battery component has case member 1 (having openend), is contained in the cell device in the case member 1 and is installed in the top cover 2 and the bottom 3 of two openends of case member 1.In following explanation, the openend that top cover 2 is installed to is called the top, and the openend that bottom 3 is installed to is called the bottom.
Cell device for example is box-like or plate shape winding type battery element (box-shaped or plate-shapedroll type battery element).Case member 1 is a plate shape.When primary flat is observed, case member 1 is a rectangle.Case member 1 has at least the concave portions 6a that exposes the longer sides two ends that are formed on top cover 2 and notch portion 10a and the 10b of 6b.The opening at place, case member 1 end is a rectangle.Two of each opening are outstanding with the shape of elliptic arc than minor face.
In addition, the shape of top cover 2 and bottom 3 forms and makes them be installed to the opening at place, case member 1 two ends.When observing from the front of top cover 2 and bottom 3, they be giving prominence to the shape of elliptic arc than minor face of rectangle and theirs.As shown in Figure 5, concave portions 6a and 6b are formed on the two ends of a longer sides of top cover 2, thereby prevent that battery component is connected with the battery component slot reversed polarity of electronic installation.In addition, on the front surface of top cover 2, form through hole 26a and 26b.
Next, with reference to Fig. 6 to 10, cell device 4, case member 1, top cover 2 and bottom 3 are described.
＜cell device 〉
Fig. 6 A and Fig. 6 B are perspective view and the sectional views that illustrates according to the example of the outward appearance of the cell device 4 of first embodiment of the invention.Fig. 6 B illustrates the structure of the terminal part of negative electrode 8 and anode 9 coilings.Cell device 4 is made of the anode 9 and the dividing plate 19b that form band shape and the negative electrode 8 of reeling along its longitudinal direction, dividing plate 19a, be oppositely arranged with negative electrode 8.Negative electrode 8 and anode 9 two surface-coated separately have polymer dielectric 20.As shown in Fig. 6 B, polymer dielectric 20 is applied to negative electrode 8 and anode 9 two surfaces separately fully, makes the terminal part of polymer dielectric 20 complete covered cathodes 8 and anode 9.The anode terminal 5b that is connected to the cathode terminal 5a of negative electrode 8 and is connected to anode 9 stretches out (unless spell out electrode terminal, otherwise cathode terminal 5a and anode terminal 5b only are called electrode terminal 5) from cell device 4.Cathode terminal 5a and anode terminal 5b two surface-coated separately have resin sheet 7a and 7b, with the bond properties that improves laminated film (below will be described as case member 1) (below, resin sheet 7a and 7b are called sealant (sealant)).
According to cell types, the cathode active material of negative electrode 8 can be metal oxide, metal sulfide or predetermined polymer.When battery component was lithium ion battery, cathode active material can be lithium composite xoide Li for example
XMO
2(wherein M represents one or more transition metal; Value in X representative from 0.05 to 1.10 scope, this value depends on the charge/discharge state of battery).The transition metal of forming lithium composite xoide is preferably cobalt (Co), nickel (Ni), manganese (Mn) etc.
Cathode active material layer is made of for example cathode active material, conductive agent and binding agent.Equalization is mixed these materials (equally) and is formed cathode mix.This cathode mix is dispersed in the solvent.Thereby obtain the slurry of cathode mix.By for example scraping the skill in using a kitchen knife in cookery cathode mix slurry is coated on the cathode collector equably.At high temperature the target current-collector heats so that solvent evaporates.Thereby obtain cathode active material.In this case, the mixing ratio of target active material, conductive agent, binding agent and solvent does not limit, as long as they are dispersed in the solvent equably.
Lithium ion composite oxides (lithium ion multi-oxide) specifically be exemplified as LiCoO
2, LiNiO
2, LiNi
yCo
1-yO
2(wherein 0＜y＜1) and LiMnO
4Replacedly, a part of transition metal can be used as the lithium ion composite oxides by the solid solution that another metal replaces.This solid solution be exemplified as LiNi
0.5Co
0.5O
2And LiNi
0.8Co
0.2O
2These lithium composite xoides can produce high voltage and have high-energy-density.Interchangeable, cathode active material can be metal sulfide or the metal oxide that does not contain lithium, for example TiS
2, MoS
2, NbSe
2Or V
2O
5Negative electrode can be made by polytype these cathode active materials.When negative electrode is made by these cathode active materials, can add conductive agent and/or binding agent.
The material with carbon element of use such as carbon black or graphite is as conductive agent.Use for example poly-(vinylidene fluoride) (poly (vinylidene fluoride)), polytetrafluoroethylene (poly (tetrafluoroethylene)) or Kynoar (PVDF) as binding agent.For example use N-methyl pyrrolidone (methylpyrrolidone) as solvent.
Anode active material layer is made of for example anode active material, also comprises conductive agent and binding agent if desired.Mix these materials equably and form anode mixture.This anode mixture is dispersed in the solvent.Thereby obtain the slurry of anode mixture.By for example scraping the skill in using a kitchen knife in cookery slurry of anode mixture is coated to anode collector equably.At high temperature the antianode current-collector heats so that solvent evaporates.Thereby obtain anode active material.In this case, the mixing ratio of antianode active material, conductive agent, binding agent and solvent does not limit, as long as they are dispersed in the solvent equably.
As the material of anode 9, for example can use the material that can embed (dope) or take off embedding (dedope) lithium.The carbonizable substance that is exemplified as ungraphitised carbon of this material and graphite mould material.More specifically, can use RESEARCH OF PYROCARBON class, coke class (pitch coke, needle coke, petroleum coke etc.), graphite-like, glass mould carbon class, organic polymer sintered body (carbonized bodies of sintering phenolic resins or furane resins under proper temperature), carbon fiber, active carbon etc.Material as embedding or removal lithium embedded for example can use polymer such as polyacetylene, polypyrrole and oxide (for example, SnO
2).When anode 9 is made by these materials, can add binding agent etc.
Can with lithium form alloy material be exemplified as various types of metals such as tin (Sn), cobalt (Co), indium (In), aluminium (Al), silicon (Si) and alloy thereof.When using lithium metal, needn't always use its powder of adhesive coated.Interchangeable, can use (rolled) lithium metallic plate of roll extrusion.
Binding agent be exemplified as polyvinylidene fluoride and butadiene-styrene rubber (SBR).Solvent be exemplified as N-methyl pyrrolidone and butanone (methyl ethyl ketone).
The same with negative electrode 8, anode 9 has spot welding or is ultrasonically welded to anode terminal 5b on the part of current-collector.Anode terminal 5b is preferably the mesh type metal paper tinsel.Yet anode terminal 5b can be made by the nonmetallic substance of conduction, as long as this material is electrochemistry or chemically stable and conduction.The material of anode terminal 5b is for example copper (Cu) or nickel (Ni).
Polymer dielectric is made up of polymer material, electrolyte and electrolytic salt.Their are mixed and the electrolyte of gel is carried out polymerization.With electrolyte dissolve polymer material.Polymer material be exemplified as that silicon gel, acrylic gel, acrylonitrile gel, condensed phosphate (polyphosphazen) are polymer-modified, poly(ethylene oxide) and PPOX.As the example of these conjugated polymers, these cross-linked polymers, polymer-modified and fluorinated polymer, use polymer material as poly-(vinylidene fluoride), poly-(vinylidene fluoride is hexafluoropropylene altogether), polyvinylidene fluoride trifluoro-ethylene altogether) and composition thereof.
Electrolyte ingredient be exemplified as the aprotic solvent (aprotic solvent) that for example can disperse above-mentioned polymer material.The example of aprotic solvent is ethylene carbonate (EC), propylene carbonate (PC) and carbonic acid fourth diester (BC).Dissolving electrolyte salt is formed in solvent and by cation and anion.As cationic example, use alkali metal and alkaline-earth metal.As anionic example, use Cl
-, Br
-, I
-, SCN
-, ClO
4 -, BF
4 -, PF
6 -And CF
3SO
3Specifically being exemplified as to dissolve in of electrolytic salt has certain density lithium hexafluoro phosphate (LiPF in the electrolyte solution
6) and hexafluoro lithium borate (LiBF
4).
Electrolyte solution as the mixture of above-mentioned electrolyte and electrolytic salt forms gel with matrix polymer (matrix polymer).Thereby obtain gel electrolyte.Matrix polymer is not limited, as long as it is dissolved in the non-electrolytic solution that dissolving electrolyte salt forms in nonaqueous solvents and forms gel.Matrix polymer be exemplified as the polymer that in predetermined unit (in predetermined units) repeats to contain poly-(vinylidene fluoride), poly(ethylene oxide), PPOX, polyacrylonitrile and/or polyisobutene nitrile (poly (methacrylonitrile)).This polymer can be one of these components or its mixture.
＜case member 〉
Fig. 7 A, Fig. 7 B and Fig. 7 C illustrate first example of case member 1.As Fig. 7 A to shown in Fig. 7 C, case member 1 is made up of (softlaminate member) 1a of the flexible laminated parts with concave portions 15 of holding cell device 4 and rigid layer pressure part (hard laminate member) 1b, and rigid layer pressure part 1b covers concave portions 15 on rigid layer pressure part 1b.Concave portions 15 spinning blocks are made the shape of cell device 4.Hot adhesion sheet 15a is set on the bottom outer surface of concave portions 15.
Flexible laminated parts 1a forms rectangle.Flexible laminated parts 1a have top longer sides 11a, bottom longer sides 12a, left side than minor face 13a and right side than minor face 14a.The length of top longer sides 11a is identical with the length of bottom longer sides 12a.The left side is identical than the length of minor face 14a with the right side than the length of minor face 13a.Similarly, rigid layer pressure part 1b forms rectangle.Rigid layer pressure part 1b has top longer sides 11b, bottom longer sides 12b, left side than minor face 13b and the short end 14b in right side.The length of top longer sides 11b is identical with the length of bottom longer sides 12b.The left side is identical than the length of minor face 14b with the right side than the length of minor face 13b.The left side of flexible laminated parts 1a and rigid layer pressure part 1b and right side all are the positions based on from the top view of Figure 13 A the time.
The longer sides 11b of rigid layer pressure part 1b and the length of 12b makes when the concave portions 15 of holding cell device 4 is covered by rigid layer pressure part 1b, than minor face 13b and 14b contacts with each other or the interval is less distance.The longer sides 11a of flexible laminated parts 1a and the length of 12a are less than the longer sides 11b of rigid layer pressure part 1b and the length of 12b.The longer sides 11a of flexible laminated parts 1a and the length of 12a makes when the concave portions 15 of holding cell device 4 is covered by flexible laminated parts 1a, than minor face 13a and 14a contacts with each other or the interval is less distance.The spacing than minor face 13a and 14a of flexible laminated parts 1a is not limited to less distance, but certain distance can be arranged.
Flexible laminated parts 1a than the length of minor face 13a and 14a length than minor face 13b and 14b less than rigid layer pressure part 1b.Thereby flexible laminated parts 1a and rigid layer pressure part 1b can be stacked appear at the top of case member 1 for rigid layer pressure part 1b only.In this case, the periphery of top cover 2 that is arranged on the top open part of case member 1 can carry out hot adhesion by the polypropylene layer of rigid layer pressure part 1b.Similarly, the tack coat of rigid layer pressure part 1b can be exposed to the bottom of case member 1, thereby makes the periphery of the bottom 3 at the bottom opening place that is arranged on case member 1 carry out hot adhesion by the polypropylene layer of rigid layer pressure part 1b.
The longer sides of rigid layer pressure part 1b has notch portion 10a and 10b.Notch portion 10a and 10b are formed on such position at least, promptly when cell device 4 is installed to the open top of case member 1 by case member 1 coating and top cover 2, the concave portions 6a of top cover 2 and 6b are exposed.The shape that notch portion 10a and 10b form makes that the concave portions 6a of top cover 2 and 6b expose at least when top cover 2 is installed to the open top of case member 1.
Flexible laminated parts 1a is suitable for holding by the molded formation of spinning the concave portions 15 of cell device 4.Flexible laminated parts 1a is than rigid layer pressure part 1b softness.
Fig. 8 is the sectional view of example that the structure of the flexible laminated parts 1a that constitutes case member 1 is shown.Flexible laminated parts 1a has stepped construction, wherein stacks gradually polypropylene (PP) layer 16a as tack coat in order, as the flexible aluminium lamination 17a of metal level, as the nylon layer or PETG (PET) the layer 18a of sealer.Polypropylene layer 16a is innermost layer (1b contacts with the rigid layer pressure part).
The effect of flexible aluminium lamination 17a is to prevent the polymer dielectric sex change.For example use cast polypropylene (CPP) as polypropylene layer 16a.The thickness of polypropylene (PP) layer 16a is for example 30 μ m.
The effect of flexible aluminium lamination 17a is to avoid moisture to enter into inside.The material of flexible aluminium lamination 17a be exemplified as annealed aluminium (JIS A8021P-O) or (JIS A8079P-O).The thickness of flexible aluminium lamination 17a at 30 μ m in the scope of 130 μ m.The effect of nylon layer or pet layer 18a is the protection surface.The thickness of nylon layer or pet layer 18a at 10 μ m in the scope of 30 μ m.
Rigid layer pressure part 1b can keep resisting the shape of dimensional deformation bending.Rigid layer pressure part 1b has stepped construction, wherein stacks gradually polypropylene layer as tack coat in order, as the rigid aluminium lamination of metal level and as the nylon layer or the pet layer of sealer.
The polypropylene layer of rigid layer pressure part 1b and nylon layer or pet layer are identical with flexible laminated parts 1a's.Rigid aluminium lamination is made by non-annealed aluminium (JIS A3003P-H18) or (JIS A3004P-H18).The thickness of rigid aluminum metal at 30 μ m in the scope of 130 μ m.Select the thickness of each layer of flexible laminated parts 1a and rigid layer pressure part 1b by the gross thickness of considering battery component.
Fig. 9 illustrates second example of case member 1.Among Fig. 9, lamination cell device 50 is coated by case member 1.Top cover 2 and bottom 3 are arranged on two end faces of lamination cell device 50.
Subsequently, on the direction of lamination cell device 50 folding shell parts 1 than minor face 32a with than minor face 32b.The tack coat of the sealer of lamination cell device 50 and case member 1 carries out for example hot adhesion.After this, the predetermined anchor clamps of utilization keep lamination cell device 50, top cover 2 and bottom 3 and they are carried out hot adhesion.In other words, will be by the above and below that is placed on case member 1 top such as the metal heater block of copper.Heater block pressurizes to the top of case member 1, makes the tack coat of inner surface of the periphery of top cover 2 and rigid layer pressure part 1b carry out hot adhesion.Similarly, heater block is placed on the above and below of case member 1 bottom.Heater block pressurizes to the bottom of case member 1, makes the tack coat of inner surface of the periphery of bottom 3 and rigid layer pressure part 1b carry out hot adhesion.
Subsequently, by the through hole 26a and the 26b of top cover 2, molten resin is injected in the space that forms between cell device 4 and the top cover 2.After this, molten resin is solidified.Then, by the through hole of bottom 3, molten resin is injected in the space that forms between cell device 4 and the bottom 3.After this, molten resin is solidified.
With case member 1 coating layer piezoelectricity pond element 50 and after two ends of case member 1 form open top and bottom opening, top cover 2 and bottom 3 can be respectively installed to open top and bottom opening.
＜top cover 〉
Though it is unrestricted to be formed on the shape of concave portions 6a on the two ends of a longer sides of upper bracket 2a and 6b, preferably, considers the flexibility of electronic installation side design and form them.For example, concave portions 6a and 6b cave in and become the stairstepping than minor face towards upper bracket 2a.
In addition, top cover 2 has circuit board.Be connected to circuit board from cell device 4 extended electrode terminal 5a and 5b.
Circuit board has protective circuit, and this protective circuit comprises the ID resistance of temperature protection device (for example, fuse), positive temperature coefficient (PTC) circuit, thermistor and identification battery component.In addition, this circuit board has a plurality of (for example three) contact portion.Protective circuit comprises the IC and the charge/discharge control FET of monitoring battery element 4 and controlling filed effect transistor (FET).
PTC circuit and cell device 4 are connected in series.When the temperature of cell device 4 becomes when being higher than design temperature, the resistance of PTC circuit sharply increases, and stops electric current to flow in cell device 4 substantially.Fuse and thermistor also are connected in series with cell device 4.When the temperature of cell device 4 becomes design temperature than fuse and thermistor when high, they are breaking at the electric current that flows in the cell device 4.Comprise monitoring battery element 4 and control the IC of FET and the voltage that charge/discharge is controlled the protective circuit monitoring battery element 4 of FET.When the voltage of cell device 4 surpasses 4.3V to 4.4V, because may cause danger in the cell device 4 situation such as heat production, so protective circuit shutoff charge/discharge control FET, to forbid to cell device 4 chargings.When cell device 4 overdischarge (over-discharge), the terminal voltage of cell device 4 is reduced to discharge and is forbidden voltage, and the voltage of cell device 4 becomes 0V, and cell device 4 becomes the not internal short-circuit state of rechargeable of cell device 4.Thereby, the voltage of protective circuit monitoring battery element 4.When the voltage of cell device 4 becomes when forbidding that than discharge voltage hangs down, protective circuit is turn-offed discharge control FET to forbid cell device 4 discharges.
＜bottom 〉
The bottom opening of bottom 3 closure parts 1.When observing from the front of bottom 3, it be that rectangle and two give prominence to ellipse arc than minor face.Bottom 3 has sidewall on the surface of its adjacent cells element 4.Sidewall is suitable for the bottom opening of case member 1.Sidewall is along the part of bottom 3 or whole neighboring and form.Sidewall is formed on the position that separates the length of case member 1 with the neighboring of bottom 3.
Next, with the manufacture method of describing according to the cell device of first embodiment of the invention.
＜cell device manufacturing step 〉
Stack gradually anode, dividing plate, negative electrode and dividing plate in order.Thereby cambium layer casting die.Anode and negative electrode have gel electrolyte layer on two surface.With laminate at the transversely coiling of core repeatedly around dull and stereotyped core.Thereby make winding type battery element 4.
＜case member encapsulation steps 〉
Molded flexible laminated parts 1a forms the concave portions 15 of holding cell device 4 by degree of depth ground spinning.In this, shown in Fig. 7 A, the concave portions 15 of holding cell device 4 is formed on the position that takes over a little from the center of flexible laminated parts 1a.Cell device 4 is placed in the concave portions 15 that is formed among the flexible laminated parts 1a.
After this, shown in Fig. 7 A, stacked rigid layer pressure part 1b and flexible laminated parts 1a make rigid layer pressure part 1b take over a little from flexible laminated parts 1a.Thereby, when flexible laminated parts 1a and rigid layer pressure part 1b carrying out like that shown in Fig. 7 A was stacked, the non-lamination area in left side of flexible laminated parts 1a appearred, and the non-lamination area in right side of rigid layer pressure part 1b.As described later, after the end with flexible laminated parts 1a and rigid layer pressure part 1b was folded in the bottom surface outside of concave portions 15 of flexible laminated parts 1a, the polypropylene layer that these zones make flexible laminated parts 1a bondd with predetermined width with the polypropylene layer of rigid layer pressure part 1b.
In the layout plan shown in Fig. 7 A, hot adhesion is carried out on four limits of the opening of concave portions 15 under the atmospheric pressure that reduces.In this case, the lap of polypropylene layer can hot adhesion.When the peripheral hot adhesion of concave portions 15, cell device 4 is sealed.
After this, shown in Fig. 7 A, the hot adhesion sheet 15a of reservation shape is placed on the outside of the bottom surface of concave portions 15.Hot adhesion sheet 15a is the nylon layer of the flexible laminated parts 1a of hot adhesion or the accessory of pet layer.Consider the integral thickness of battery component, the thickness of preferred hot adhesion sheet 15a 10 μ m in the scope of 60 μ m and its fusing point be about 100 ℃.The fusing point of preferred hot adhesion sheet 15a does not have thermal impact to cell device 4.
After this, as shown in figure 11, the end of flexible laminated parts 1a and rigid layer pressure part 1b is folded in the outside of bottom surface of the concave portions 15 of flexible laminated parts 1a.Just, inwardly the folding of flexible laminated parts 1a than minor face 13a, 14a and rigid layer pressure part 1b than minor face 13b, 14b.Subsequently, hot adhesion is carried out in the end of flexible laminated parts 1a and rigid layer pressure part 1b.In addition, flexible laminated parts 1a is thermally bonded to the outside of the bottom surface of concave portions 15.Thereby flexible laminated parts 1a and rigid layer pressure part 1b make concave portions 15 sealings of holding cell device 4.Thereby form open top and bottom opening.
As shown in Figure 12, when rigid layer pressure part 1b coated cell device 4, rigid layer pressure part 1b contact with 14b or joint L1 occurs than minor face 13b, and was relative with the gap of lacking than the end face of minor face 13b and 14b at this joint L1.In rigid layer pressure part 1b, flexible laminated parts 1a contacts with 14a or joint L2 occurs than minor face 13a, and is relative with short gap than the end face of minor face 13a and 14a at this joint L2.In Figure 12, Reference numeral 16b represents the polypropylene layer of rigid layer pressure part 1b.Reference numeral 17b represents rigid aluminium lamination.Reference numeral 18b represents nylon layer or pet layer.In this example, than minor face 13a contact with 14a or their end face relative with less clearance.Perhaps, the end face than minor face 13a and 14a can be relative with clearance of predetermined width.
As shown in Figure 12, the nylon layer of flexible laminated parts 1a or pet layer 18a are placed on the top of hot adhesion sheet 15a.Thereby hot adhesion sheet 15a is clipped in the middle of nylon layer or the pet layer 18a.Thereby when from the outside nylon layer or pet layer 18a being heated, they can bond.In addition, because the polypropylene layer 16a of flexible laminated parts 1a and rigid layer pressure part 1b contacts with 16b, so when from the outside they being heated, polypropylene layer 16a and 6b can bond.
Therefore, can make the battery component that coats by laminate member, and not need box-like resin-case and left and right sides resinous framework as case member.
＜top cover installation steps 〉
After this, as shown in Figure 13, make electrode terminal 5a and 5b be connected to circuit board 22 by for example electric resistance welding or ultrasonic bond.After this, as shown in figure 14, circuit board 22 is inserted in the open space of upper bracket 2a, makes upper bracket 2a covering board 22.Upper bracket 2a is the resine moulded unit made from for example different injection moulding steps.
Flatly the holding member of holding circuit plate 22 (hold member) is arranged among the upper bracket 2a.On the upper surface of upper bracket 2a, form three openings 21 in position corresponding to the contact portion 23 of circuit board 22.Contact portion 23 extends to the outside by opening 21.The width of upper bracket 2a is slightly less than open-topped inside dimension in the case member 1.
After this, as shown in figure 15, lower bracket 2b is installed to upper bracket 2a.Lower bracket 2b is the resine moulded unit made from for example different injection moulding steps.Two ends and middle position at the longer sides of lower bracket 2b are provided with rib 25a, 25b and 25c.Rib 25a, 25b and 25c are in the face of upper bracket 2a.The end face of rib 25a, 25b and 25c receives the circuit board 22 of upper bracket 2a.Thereby rib 25a, 25b and 25c be support circuit plate 22 reliably.
After this, as shown in Figure 16 shown in the arrow R, upper bracket 2a that will install with hand or anchor clamps and lower bracket 2b revolve in the counterclockwise direction and turn 90 degrees.The orientation of circuit board 22 thereby (orientation) changes 90 degree.Circuit board 22 is kept by upper bracket 2a and lower bracket 2b, is not exposed to the outside.Thereby, when rotation circuit plate 22, can prevent that circuit board 22 from being stain or damaging by hand or anchor clamps.
After this, as shown in Figure 17, in folding electrode terminal 5a and 5b, upper bracket 2a and lower bracket 2b are pushed in the open top of case member 1 (along the direction of arrow S1).Thereby top cover 2 is installed to the open top of case member 1.As mentioned above, because the width of top cover 2 is slightly less than the open-topped inside dimension of case member 1, therefore the upper bracket 2a of holding circuit plate 22 and lower bracket 2b are contained in the open top that is formed by rigid layer pressure part 1b near the end face of case member 1.
＜bottom installation steps 〉
After this, as shown in Figure 17, the sidewall of bottom 3 is pushed in the bottom opening of case member 1 (along the direction shown in the arrow S2).Thereby the sidewall of bottom 3 is installed to the bottom opening of case member 1.In addition, the bottom opening of bottom 3 covering shell parts 1.Bottom 3 is resine moulded units made from different injection moulding steps.
＜hot adhesion step 〉
After this, with predetermined anchor clamps, keep case member 1, top cover 2 and bottom 3 and they are carried out hot adhesion.In other words, will be by the above and below that is placed on case member 1 top such as the metal heater block of copper.With heater block pressurizeed in the top of case member 1, so that the tack coat of the inner surface of the periphery of top cover 2 and rigid layer pressure part 1b carries out hot adhesion.Similarly, heater block is placed on the above and below of case member 1 bottom.With heater block pressurizeed in the bottom of case member 1, make the polypropylene layer of inner surface of the periphery of bottom 3 and rigid layer pressure part 1b carry out hot adhesion.
＜resin implantation step 〉
After this, by through hole 26a and 26b molten resin is injected in the space that forms between cell device 4 and the top cover 2.Make resin solidification subsequently.Thereby make top cover 2 be bonded to the end face of cell device 4.
After this, the through hole by bottom 3 is injected into molten resin in the space that forms between cell device 4 and the bottom 3.Make resin solidification subsequently.Thereby make bottom 3 be bonded to the end face of cell device 4.The resin that is injected is not limited to specific type, as long as this resin has low viscosity in top that is injected into case member 1 and bottom opening the time.The polyamide type that the is exemplified as thermoplastic resin of resin, polyolefin-type thermoplastic resin, nylon, polypropylene (PP) resin, Merlon (PC) resin and acrylonitrile-butadiene-styrene resin (ABS).
In these steps, can make battery component according to first embodiment of the invention.
According to the first embodiment of the present invention, can obtain following effect.
Battery component has and comprises the square of openend or rectangular enclosure parts 1, is contained in wherein cell device 4, is installed to the top cover 2 and the bottom 3 of the openend of case member 1.Top cover 2 has concave portions 6a and 6b in the both sides of a longer sides.Case member 1 has notch portion 10a and the 10b that the concave portions 6a that makes top cover 2 at least and 6b expose.Thereby, can not prevent under the condition that volumetric efficiency is a cost that to reduce the battery component reversed polarity from connecting.
Next, the first embodiment of the present invention is specifically described.The present invention is not limited to following example.Next, with reference to the accompanying drawings, first embodiment and comparative example are described.
First embodiment
Figure 18 is the perspective view that illustrates according to the battery component profile of first embodiment of the invention.The place, two ends of a longer sides of top cover 2 forms concave portions 6a and 6b.Case member 1 has notch portion 10a and the 10b that the concave portions 6a that makes top cover 2 and 6b expose.
First comparative example
Figure 19 is the perspective view that illustrates according to the battery component profile of first comparative example.Identical according to the structure of the battery component of first comparative example with structure according to the battery component of first embodiment, just saved the notch portion 10a and the 10b of case member 1 according to the battery component of first comparative example.
Second comparative example
Figure 20 is the perspective view that illustrates according to the battery component profile of second comparative example.Identical according to the structure of the battery component of second comparative example with structure according to the battery component of first embodiment, just the battery component according to second comparative example has jut 51a and the 51b that distinguishes negative electrode and anode on the end face of the top of battery component, rather than the notch portion 10a and the 10b of the concave portions 6a of top cover 2 and 6b and case member 1.
The 3rd comparative example
Figure 21 is the perspective view that illustrates according to the battery component profile of the 3rd comparative example.Identical according to the structure of the battery component of the 3rd comparative example with structure according to the battery component of first embodiment, just the end face of top cover 2 is outstanding from the open top of case member 1, rather than the notch portion 10a of case member 1 and 10b, thereby make the concave portions 6a of top cover 2 and 6b not coated by case member 1.
According to first embodiment and comparative example, draw following result.
In the battery component according to first comparative example, because the whole periphery of top cover 2 coats by case member 1, so the electronic installation side does not have the flexibility that design is suitable for the jut of concave portions 6a and 6b.When the case member 1 that covers concave portions 6a and 6b because of external impact for example under battery component drops situation on the floor at concave portions 6a and 6b place when recessed, can prevent that battery component from receiving electronic installation.
In the battery component according to second comparative example, though the jut 51a and the 51b that are arranged on the top cover end face can distinguish negative electrode and anode, it is big that the external dimensions of battery component becomes.In addition, the shape of jut 51a and 51b need with the form fit of cell apparatus side.Like this, battery component has lost versatility.In addition, when jut 51a and 51b for example damaged under battery component drops to the situation on floor because of external impact, negative electrode and anode just can not have been distinguished.
In battery component, because it is bigger to be used for the space of top cover 2 and case member 1 hot adhesion, so need to increase the height of top cover 2 according to the 3rd comparative example.Thereby the volumetric efficiency of battery component is improved.
On the contrary, in battery component according to first embodiment of the invention, because top cover 2 has concave portions 6a and 6b on the both sides of a longer sides, and case member 1 has notch portion 10a and 10b that the concave portions 6a that makes top cover 2 at least and 6b expose, so the problem in first comparative example to the, three comparative example can not occur.In other words, in the battery component according to first embodiment, volumetric efficiency does not reduce.In addition, the battery component according to first embodiment provides following advantage: case member 1 not can because of external impact for example battery component drop under the situation on floor deform, excellent versatility and excellent volumetric efficiency.
Next, second embodiment of the invention is described.According to second embodiment, the molding outer casing parts make it have the different elliptic cross-section of radius of curvature.In following description, the part identical with first embodiment represented by identical Reference numeral and omitted description of them.
According to second embodiment, when coating cell device, make flexible laminated parts 1a and rigid layer pressure part 1b shape bending along cell device with case member.Because flexible laminated parts 1a is that spinning is molded, so the end of the top of rigid layer pressure part 1b and bottom opening can be easily crooked.When molded flexible laminated parts 1a, the radius of curvature from the bottom surface portions of battery component to its each lateral parts diminishes.On the other hand, because the rigidity of the metal level of laminated film, the radius of curvature from each lateral parts of battery component to its upper surface is greater than the radius of curvature from bottom surface portions to each lateral parts.Flexible laminated parts 1a and rigid layer pressure part 1b be molded as make their elliptic cross-section have different radius of curvature, battery unit 29 as shown in Figure 22.After this, make the CPP layer hot adhesion of rigid layer pressure part 1b and flexible laminated parts 1a.Thereby obtain the battery component of rigid layer pressure part 1b as outermost layer protection cell device 4.
In this case, bonding sheet 15a is placed in the outside, the bottom surface of the concave portions 15 that preferably forms in flexible laminated parts 1a.Bonding sheet 15a makes the nylon layer of flexible laminated parts 1a or the accessory of pet layer hot adhesion.
After this, cathode terminal 5a and anode terminal 5b that extends from the top of the battery unit 29 that is molded as reservation shape and the protective circuit that has been installed on the circuit board are carried out electric resistance welding or ultrasonic bond.As shown in figure 23, the circuit board that is connected to cell device 4 is inserted in the space of top cover 27, wherein upper bracket 27a and lower bracket 27b are molded and install.
Next, describe procedure of processing with reference to Figure 24, Figure 25 and Figure 26, it is initial step that described step is contained in the top cover with circuit board, is end step with the rigid layer pressure part 1b that top cover is connected to as case member.Figure 24, Figure 25 and Figure 26 illustrate the perspective view that top cover is installed to the step of case member.
As shown in figure 24, upper bracket 27a is placed on the top of the circuit board 22 that is connected to battery unit 29, makes upper bracket 27a covering board 22.After this, as shown in figure 25, lower bracket 27b and upper bracket 27a are aimed at and be mounted to, make circuit board 22 be contained in therebetween.As shown in Figure 26, change the orientation of top cover 27, make lower bracket 27b towards battery unit 29.After this, top cover 27 is installed to an opening portion of battery unit 29.When top cover 27 was installed to the opening portion of battery unit 29, folding electrode terminal 5 also was contained in the battery unit 29 it.
When top cover 27 is installed to battery unit 29, the contact of upper bracket 27a and rigid layer pressure part 1b is descended.For fear of this problem, molded end face R part 33 makes it have corner part, and described corner part has different radius of curvature R and r.In addition, molded upper surface portion 34 makes it have the identical corner part of radius of curvature and end face R part 33.Thereby shown in Figure 27 C, the shape of the shape of top cover 27 and battery unit 29 becomes identical.Thereby the contact of battery unit 29 and top cover 27 improves and prevents that top cover 27 from coming off because of impact.
In order to understand this embodiment of the present invention easily, Figure 28 shows the state that the top cover with elliptic cross-section 35 that uses in the prior art is installed to battery unit.In this case, because the radius of curvature of top cover 35 is bigger than the radius of curvature at battery unit 29 basal surface part two ends, thus there is the gap at the two ends of battery unit 29 basal surfaces part, shown in dotted line 30.Thereby top cover 35 becomes not enough with the contact of battery unit 29.Thereby the contact deficiency can cause battery component to break down.
As shown in figure 22, will be installed to the bottom opening part of battery unit 29 by the bottom 28 that the resine moulded unit of injection moulding is made.The bottom 28 and the case member of hot adhesion battery unit 29.Bottom 28 can have the cross section of approximate ellipsoidal.Replacedly be, the same with top cover 27, bottom 28 can have corner part, and described corner part has different radius of curvature r and R.In this case, the contact of bottom 28 improves.In addition, can prevent that bottom 28 from coming off.When bottom 28 when having planar section F as the left side of the part of a case member part and right side, battery component can easily be aimed at the battery component slot of electronic installation, and prevents dislocation.
Thereby, can obtain having the battery component of the easy alignment of excellent volumetric efficiency, stronger external impact resistance and battery component slot.
Next, the result of the test that the battery component according to second embodiment of the invention is carried out fall-down test (drop test) describes.
Test battery assembly with structure is as shown in figure 22 fallen to concrete floor from the height of 1.5m, check the state that top cover separates with battery component then.The end face R that is installed to the upper bracket that constitutes top cover partly has corner part, makes the radius of curvature at basal surface part two ends of battery component be different from the radius of curvature at the upper surface two ends of battery component.The upper surface portion of upper bracket has the concave portions of distinguishing negative electrode and anode at the bigger corner part of radius of curvature, and has planar section on the side that forms between the less corner part of the bigger corner part of radius of curvature and radius of curvature.Carry out fall-down test under the following conditions.
(1) battery component falls at top cover state down.
(2) battery component falls at a side state down.
As the battery component that is used to carry out fall-down test, make 50 test battery assembly A and 50 test battery assembly B, wherein battery component A has such top cover, the radius of curvature of two sides of mounting portion is 1/2 of a battery component thickness, battery component B has such top cover, the radius of curvature from the opening portion of the concave portions of holding cell device to the side less than from the surface in the outside of the basal surface of concave portions to the radius of curvature of side.Each battery component test 30 times.In fall-down test (2), to every side test of each battery component 15 times.
The state of testing the battery component after 30 times is divided into three types.Calculating is divided into the quantity of all types of battery components.
State A: top cover coming off from the case member less than 1/4 zone of top cover neighboring.
State B: top cover is 1/4 to 3/4 zone of top cover neighboring from coming off on the case member.
State C: top cover coming off from the case member surpasses 3/4 zone (comprising the state that lid is removed from case member) of top cover neighboring.
Table 1 illustrates the test result of fall-down test (1).
Table 1
Table 2 shows the test result of fall-down test (2).
Table 2
The test result of fall-down test (1) shows that among the test battery assembly A of the top cover A that uses, when the assembled battery assembly, the installation error rate of case member and top cover is higher, and the shedding frequence of top cover and case member is relative higher in using prior art.On the contrary, in the test battery assembly B that has according to the top cover B of the embodiment of the invention, when the assembled battery assembly, the installation error rate of case member and top cover is very low, and the shedding frequence of top cover and case member is lower.Thereby, can know that the external impact resistance of finding out the battery component B with top cover B is higher than the battery component A with top cover A.
The test result of fall-down test (2) shows that among the test battery assembly A of the top cover A that uses, the shedding frequence of top cover and case member is higher in using prior art.In the test battery assembly B that has according to the top cover B of the embodiment of the invention, shedding frequence is lower.In having the test battery assembly A of top cover A, the external dimensions difference of case member and top cover A is bigger.In having the test battery assembly B of top cover B, (equality) is higher for the isotropism of the shape of lateral parts.This will cause the difference of damping performance.
Next, third embodiment of the invention is described.In the battery component of Shi Yonging, circuit board 103 is contained in the top cover 102 that is made of upper bracket 102a and lower bracket 102b in the prior art.Top cover 102 is installed to an opening portion of case member 1.Like this, shown in Fig. 3 A and Fig. 3 B, the electrode terminal 105 that is connected to circuit board 103 is folded and is contained in the battery component.
In order to understand the third embodiment of the present invention easily, Figure 29 shows the electrode terminal leads part (lead portion) of the battery component that uses in the prior art and the layout of upper bracket 102a.In the electrode terminal leads represented by the dotted line shown in Figure 29 part, electrode terminal extends out near the end as the rigid layer pressure part of case member.Thereby, when top cover is installed to the rigid layer pressure part, the electrode terminal 5 of the relative part extruding electrode terminal leads part that the solid line by shown in Figure 29 of upper bracket 102a is represented.
In order to prevent that part hinders the electrode terminal of folding up 105 relatively, need between top cover 102 and cell device, provide space or minimizing to be thermally bonded to the mounting portion of case member.Yet in last structure, volumetric efficiency reduces.In one structure of back, the hot adhesion undercapacity of top cover and rigid layer pressure part.
Thereby as shown in figure 30, a third embodiment in accordance with the invention forms notch portion 37a at the part place of upper bracket 36a.Notch portion prevents upper bracket 36a hindrance electrode terminal 5.Figure 31 shows the example according to the structure of the battery component of third embodiment of the invention.In this battery component, the top cover that is made of upper bracket 36a and lower bracket 36b (describing after a while) is installed to the opening portion of rigid layer pressure part.Thereby, the increase that can avoid pushing electrode terminal He avoid battery component thickness.In following description, the part identical with first and second embodiment represented by identical Reference numeral and omitted description of them.
Figure 32 shows the state under electrode terminal leads part is installed to flexible laminated parts 1a at the upper bracket 36a shown in Figure 30 situation.Shown in figure 32, the mounting portion of upper bracket 36a is inserted in the end of flexible laminated parts 1a.Yet, because upper bracket 36a has notch portion 37a, so upper bracket 36a does not hinder electrode terminal 5.Thereby, because upper bracket 36a has the notch portion relative with electrode terminal 5, so can reduce the space of formation between top cover 36 and the cell device 4.Thereby, can make the battery component that electrode terminal 5 does not hinder top cover 36 with enough hot adhesion intensity.
When the thickness of battery component hour, electrode terminal 5 hinders lower bracket and electrode terminal 5 outstanding on the thickness direction of battery component.For fear of like this, as shown in figure 33, on the basal surface of top cover 36, form notch portion 37b and 37c, make notch portion 37b corresponding with the wiring of electrode terminal with 37c.Thereby, electrode terminal 5 is folded and is contained among notch portion 37b and the 37c.
In this case, because notch portion 37b and 37c be formed on the lateral parts of basal surface of lower bracket 36b, so the zone with notch portion of basal surface diminishes.Thereby the intensity of lower bracket 36b reduces.In addition, as bottom support 36b during by resin molded forming, lower bracket 36b is easy to distortion.For fear of this problem, as shown in figure 33, preferably thickness be equal to or greater than bottom thickness lower bracket 36b basal surface part vertically on form protrusion walls, thereby keep intensity and the mouldability of lower bracket 36b.
Figure 34 A and Figure 34 B show the layout under lower bracket 36b and electrode terminal 5 be installed to the rigid layer pressure part at top cover the state.Figure 34 A shows lower bracket 36b and the layout of cell device 4 under the ventricumbent state of electrode terminal leads part of battery unit.Figure 34 B shows lower bracket 36b and the layout of cell device 4 under the ventricumbent state of electrode terminal leads part of battery unit.When top cover was installed to the rigid layer pressure part, the position of lower bracket 36b was near cell device 4.In Figure 34 A and Figure 34 B, for clear, lower bracket 36b and cell device 4 are separately.
Figure 34 A and Figure 34 B illustrate, and the notch portion 37b and the 37c that are formed on the precalculated position of lower bracket 36b provide the space for electrode terminal 5, and have avoided upper bracket 36a extruding electrode terminal 5 and prevented that battery component thickness from increasing.
Figure 35 shows upper bracket 36a, lower bracket 36b according to third embodiment of the invention and the structure of battery unit 29.When the thickness of battery component hour, as shown in figure 35, rely on top cover 36 with notch portion 37a and lower bracket 36b with notch portion 37b and 37c, these notch portion can more effectively prevent top cover 36 and lower bracket 36b extruding electrode terminal.
When the thickness of battery component is relatively large, rely on the lower bracket 36b with basal surface part of thickness less than upper bracket 36a, can obtain the effect identical with 37c with the notch portion 37b of lower bracket 36b.Thereby, can save notch portion 37b and the 37c of lower bracket 36b.When the thickness of battery component is big, because the thickness of upper bracket 36a is bigger, even, can not cause adverse effect to the intensity of battery component so upper bracket 36a and lower bracket 36b are designed so that the thickness of the thickness of lower bracket 36b less than upper bracket 36a yet.Even the thickness of battery component increases, the position of electrode terminal leads part can not change yet, as long as adopt the structure according to the cell device of this embodiment.Thereby upper bracket 36a need have notch portion 37a.
Next, with reference to Figure 36, Figure 37, Figure 38, Figure 39 A, Figure 39 B, Figure 39 C and Figure 39 D, describe procedure of processing, it is initial step that described step is contained in the top cover with circuit board, and to be installed to rigid layer pressure part 1b with top cover be end step.Figure 36 is that the perspective view that top cover 36 is installed to the step of rigid layer pressure part 1b is shown to Figure 38.Figure 39 A is the sectional view that top cover 36 and the electrode terminal of folding up 5 are shown to 39D.
At first, as shown in figure 36, upper bracket 36a is placed on the top of the circuit board 22 that is connected to battery unit 29.After this, shown in Figure 37 and 39A, lower bracket 36b and upper bracket 36a are aimed at and be mounted to, make circuit board 22 be contained in therebetween.After this, shown in Figure 38 and Figure 39 B, change the orientation of top cover 36, make lower bracket 36b near battery unit 29.After top cover 36 is installed to an opening portion of battery unit 29 (referring to Figure 39 C and Figure 39 D), the top cover 36 and the case member of hot adhesion battery unit 29.When top cover 36 was installed to opening portion, electrode terminal 5 folded and is contained among notch portion 37b and the 37c.
Figure 39 D illustrates, and notch portion 37a, the 37b of upper bracket 36a and lower bracket 36b and 37c prevent the electrode terminal leads part of upper bracket 36a and lower bracket 36b extruding battery unit 29.Thereby, can prevent effectively that the thickness of battery component from increasing.In addition, because the notch portion 37b of lower bracket 36b holds the electrode terminal of folding up 5, so the notch portion 37b of lower bracket 36b need have the space of the folding electrode terminal 5 that is used to be coated with sealant 7.On the contrary, because notch portion 37c is corresponding with the wiring of electrode terminal 5, so notch portion 37c need have the space of the electrode terminal 5 that is used to be coated with sealant 7.
As shown in figure 31, be installed to and be installed to the opening opposite opening portion portions of top cover 36 as bottom 39 with the resine moulded unit of different injection moulding step manufacturing.Bottom 39 and rigid layer pressure part 1b carry out hot adhesion as the case member of battery unit 29.Alternative, can bottom 39 be connected with case member by hot resin material (hot melt agent) is injected into.When injecting hot resin, need prevent circuit board thermal deformation and/or damage.
By this way, under the situation that does not increase battery component thickness, can realize having high-quality, the battery component of the crushing resistance of high yield, high volumetric efficiency, electrode terminal.
Next, the test result of testing according to the battery component of the 3rd embodiment is described.
Manufacturing structure as shown in figure 31 and thickness be the test battery assembly of 3.97mm.After top cover and case member hot adhesion, measure the thickness of the hot adhesion part of battery component.Under each following condition, make 10 test battery assemblies.
(1) upper bracket and lower bracket each all have notch portion.
(2) upper bracket has notch portion, and lower bracket does not have notch portion.
(3) upper bracket does not have notch portion, and lower bracket has notch portion.
(4) upper bracket and lower bracket all do not have notch portion.
The maximum ga(u)ge of each battery component design is 4.00mm.After top cover and case member hot adhesion, determine that each test suite is that get well or bad.Table 3 shows the measurement result of thickness of each test battery assembly of top cover and case member hot adhesion.
Table 3
Test result represents that the thickness of some battery components of type (4) (that is, upper bracket and lower bracket all do not have notch portion) has surpassed the maximum ga(u)ge of design.Yet the thickness of the battery component of type (1), (2) and (3) does not surpass designed maximum ga(u)ge.Especially, the battery component of type (1) does not depart from its thickness.
Next, with reference to accompanying drawing, fourth embodiment of the invention is described.A fourth embodiment in accordance with the invention forms notch portion at the middle body of the installation rib of lower bracket.In addition, be parallel to or perpendicular to the trapezoidal circuit board supporting projections of vertically being provided with of lower bracket.Thereby resin can be injected in the top cover fully and equably.In this embodiment, the part identical with the part of first embodiment, second embodiment and the 3rd embodiment represented by identical Reference numeral and omitted description of them.
In addition, as describing after a while, lower bracket 41 can be expressed as lower bracket 41a, lower bracket 41b, lower bracket 41c, lower bracket 41d or lower bracket 41e.In following description, when not needing to discern lower bracket 41a, 41b, 41c, 41d and 41e, they are expressed as lower bracket 41 simply.
As shown in figure 40, circuit board 22 is inserted in the scope of freedom (free surface) of upper bracket 40a.Upper bracket 40a is installed on the circuit board 22, makes upper bracket 40a covering board 22.Upper bracket 40a has the retaining part of holding circuit plate 22 flatly.Contact portion 23 corresponding positions with circuit board 22 on upper bracket 40a form a plurality of (for example, three) opening 21.Contact portion 23 extends to the outside by opening 21.The width of upper bracket 40a is slightly less than the width of the opening on the top end face of battery unit 29.
Near the two ends of upper bracket 40a, form through hole 26a and 26b, make through hole 26a and 26b not hinder circuit board 22.The diameter of through hole 26a and 26b at Φ 0.8mm in the scope of Φ 1.5mm.
In addition, form circuit board supporting projections 43a in center near lower bracket 41a.Base plate supports projection 43a has the surface longitudinally that is parallel to lower bracket 41a.When upper bracket 40a and lower bracket 41a were installed, circuit board supporting projections 43a kept being arranged on circuit board 22 therebetween.
Figure 42 shows the state that upper bracket 40a and lower bracket 41a are installed.Lower bracket 41a is installed to upper bracket 40a, makes circuit board 22 place therebetween.According to the 4th embodiment, upper bracket 40a and lower bracket 41a install by mechanical connecting device.In other words, as shown in figure 43, upper bracket 40a has fixing hole 44a and 44b.The hook 45a that is formed on the rib 42a edge of lower bracket 41a is inserted among the 44a of hole.The hook 45b that is formed on the rib 42a edge of lower bracket 41a is inserted among the 44b of hole.Thereby upper bracket 40a and lower bracket 41a are installed.
After this, upper bracket 40a and the lower bracket 41a that has installed is inserted in the battery unit 29.After this, by through hole 26a and 26b thermoplastic resin is injected in the battery unit 29.The thermoplastic resin that injects is maintained circuit board 22, and improves the mechanical strength of battery component.
In Figure 45, Reference numeral 41b represents second example of lower bracket.Lower bracket 41b has the circuit board supporting projections 43b that is integrally formed on it.Circuit board supporting projections 43b has the surface longitudinally perpendicular to lower bracket 41b.Circuit board supporting projections 43b forms trapezoidal, and wherein the edge of circuit board supporting projections 43b is tapered.Thereby, because the circuit board supporting projections has reduced the resistance of thermoplastic resin, so can improve the injection of resin.
Next, the 3rd example to lower bracket is described.As the 3rd example, as shown in figure 46, jut 46a and 46b go out at vertical costal process from the lower bracket two ends of lower bracket 41c.Lower bracket 41c makes the injection of thermoplastic resin than getting a greater increase in the foregoing example.
In other words, when upper bracket 40a and lower bracket 41c were installed, jut 46a and 46b faced through hole 26a and the 26b of upper bracket 40a respectively.Figure 47 is illustrated in upper bracket 40a and near the bottom perspective view of the mounted state lower through-hole of lower bracket 41c 26a.As shown in figure 47, because being mounted to, lower bracket 41c and upper bracket 40a make the jut 46a of lower bracket 41c cover the through hole 26a of upper bracket 40a, so can inject thermoplastic resin equably.Thereby, can improve the injection of resin.
When metallic pin was inserted in the battery component by one among through hole 26a and the 26b, jut 46a can prevent that with 46b metallic pin from contacting with cell device 4.Thereby, can prevent that jut 46a and 46b are short-circuited.
Next, the test result that the battery component according to the 4th embodiment is carried out drop test describes.Carry out drop test by battery component is fallen from the height of 1.5m to concrete floor, check the unusual of top cover 40 and case member then and come off.
Make 50 battery components and they are tested, each all has lower bracket 41a, lower bracket 41b, lower bracket 41c, lower bracket 41d shown in Figure 48 and lower bracket 41e shown in Figure 49 wherein said battery component.Lower bracket 41d place, two ends in the vertical has rib 42a and 42b.Rib 42a and 42b are installed to top cover 40a.Core at rib 42a and 42b forms notch portion.Core at rib 42a and 42b forms notch portion.Circuit board supporting projections 43c is integrally formed on the lower bracket 41d.Circuit board supporting projections 43c has square surface.This square surface is formed near the center of lower bracket 41d.This square surface form perpendicular to lower bracket 41d vertically.
Table 4
The expression that " quantity of the battery component of circuit abnormality takes place " detects the quantity of the unusual battery component of circuit board 22.The quantity of the battery component of " state " expression top cover 40 distortion.According to the come off degree of top cover 40 with case member, " state " is subdivided into " state A " and arrives " state C ".The degree of coming off of " state A " expression top cover 40 is the quantity of battery component of 3/4 or more (comprise and remove top cover 40) of neighboring.The degree of coming off of " state B " expression top cover 40 is the quantity of 1/2 to 3/4 battery component of neighboring.The degree that comes off of " state C " expression top cover 40 is less than the quantity of 1/2 battery component of neighboring.In table 4, " */50 " are illustrated in the drop test of 50 battery components making to 41e with lower bracket 41a, and it is unusual or the quantity that " state A " arrives the battery component of one of " state C " occurs that circuit board takes place.Using lower bracket 41a in the battery component of lower bracket 41d, it is unusual that circuit substrate does not take place.In 50 battery components that use lower bracket 41e, there are 7 generation circuit substrates unusual.In the drop test of the battery component that uses lower bracket 41a, there are not to occur the top cover 40 of " state A " and the degree that comes off of case member.In 50 battery components that use lower bracket 41a, there are 6 and " state B " occurred.In 50 battery components that use lower bracket 41a, there are 44 and " state C " occurred.
As the test result of drop test, in the battery component that uses lower bracket 41a, circuit board 22 does not occur unusual.In addition, " state A " do not appear.In the battery component that uses lower bracket 41b and 41c, circuit board 22 does not occur unusual.1 or several appearance the " state A " are arranged in 50 battery components.The degree that comes off of other battery component is less relatively.
In the battery component that uses lower bracket 41d, circuit board 22 does not occur unusual.The degree that comes off of using top cover 40 in the battery component of lower bracket 41d is than using lower bracket 41a big in the battery component of 41c.In some battery components that use lower bracket 41e, circuit board 22 has occurred unusually.The degree that comes off of top cover 40 is maximum using other lower bracket 41a in the battery component of 41d in the battery component that uses lower bracket 41e.
The battery component of five types lower bracket 41 is adopted in dismounting, detects the inside of battery component then.In the battery component that uses lower bracket 41e, resin fully is not injected in the battery component, and manyly in them has a bigger hole.
The first embodiment of the present invention, second embodiment, the 3rd embodiment and the 4th embodiment have been described.Yet the present invention is not limited to these embodiment.But, can carry out various modifications according to spirit of the present invention.
For example, the numerical value that uses in aforementioned first embodiment, second embodiment, the 3rd embodiment and the 4th embodiment only is example.In case of necessity, can adopt other numerical value.
Aluminium (Al) paper tinsel that is used for rigid layer pressure part and flexible laminated parts is not construed as limiting foregoing example.Alternately, can use various materials.Especially, for the rigid layer pressure part, except JIS 1100H group, can also use other rigid aluminium, for example 2000 groups, 5000 groups and 6000 groups.
In addition, in case of necessity, can form a plurality of base plate supports projection 43a and 43b.As shown in figure 50, when forming a plurality of base plate supports projection 43a and 43b, they are support circuit plate 22 reliably.
It will be appreciated by those skilled in the art that in the scope of claims or its equivalent, according to the design needs with other factors can carry out various changes, combination, subgroup is closed and replace.
The present invention includes the Japanese patent application No.2005-013862 that submitted on January 21st, 2005, the Japanese patent application No.2005-013863 that on January 21st, 2005 submitted to, the Japanese patent application No.2005-014616 that on January 21st, 2005 submitted to and the related theme of submitting on January 21st, 2005 of Japanese patent application No.2005-014758, in conjunction with its full content as a reference at this.
Claims (3)
1, a kind of battery component comprises:
By the case member that ground floor pressure part and second layer pressure part constitute, the ground floor pressure part has concave portions;
Be contained in the cell device in the concave portions that forms in the ground floor pressure part, ground floor pressure part and second layer pressure part are stacked, make second layer pressure part cover the opening of concave portions, the open circumferential sealing of ground floor pressure part, the two ends of second layer pressure part connect the tab-like ellipse that becomes in the both sides of second layer pressure part in the bottom outside of the concave portions of ground floor pressure part; And
Be installed at least one resin molded lid of the opening portion that forms by case member,
Wherein, form corner part on than minor face two of lid, and
Wherein, from the opening of the concave portions of ground floor pressure part to each than the radius of curvature of the corner part of the curved surface of minor face less than from the outer surface of the bottom of the concave portions of ground floor pressure part to each radius of curvature than the turning of the curved surface of minor face.
2, according to the battery component of claim 1,
Wherein, the described lid has flat part than the corner part of minor face and from the bottom outer surface of the concave portions of ground floor pressure part to each from the opening of the concave portions of ground floor pressure part to each corner part than minor face.
3, according to the battery component of claim 1,
Wherein, described lid has concave portions, and the concave portions of this lid is formed on from the bottom outer surface of the concave portions of ground floor pressure part to the corner part office than the curved surface of minor face.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP014758/05 | 2005-01-21 | ||
| JP2005013862 | 2005-01-21 | ||
| JP013862/05 | 2005-01-21 | ||
| JP013863/05 | 2005-01-21 | ||
| JP014616/05 | 2005-01-21 |
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| CN2009101651691A Division CN101615700B (en) | 2005-01-21 | 2006-01-20 | Battery pack |
| CN2009101651704A Division CN101615701B (en) | 2005-01-21 | 2006-01-20 | Battery pack |
| CN2009101651687A Division CN101615699B (en) | 2005-01-21 | 2006-01-20 | Battery pack |
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| CN1828979A CN1828979A (en) | 2006-09-06 |
| CN100573973C true CN100573973C (en) | 2009-12-23 |
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| CNB2006100739396A Active CN100573973C (en) | 2005-01-21 | 2006-01-20 | Battery component |
| CN2009101651704A Active CN101615701B (en) | 2005-01-21 | 2006-01-20 | Battery pack |
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| KR100875430B1 (en) * | 2007-01-19 | 2008-12-22 | 삼성에스디아이 주식회사 | Secondary battery case and battery pack including same |
| US20110039128A1 (en) * | 2009-08-11 | 2011-02-17 | Samsung Sdi Co., Ltd. | Battery pack and method of manufacturing the same |
| KR101146377B1 (en) | 2009-09-14 | 2012-05-17 | 삼성에스디아이 주식회사 | Battery Pack |
| KR101097253B1 (en) * | 2009-11-19 | 2011-12-21 | 삼성에스디아이 주식회사 | Secondary battery |
| US8802278B2 (en) | 2010-07-08 | 2014-08-12 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| JP5966591B2 (en) * | 2012-05-15 | 2016-08-10 | ソニー株式会社 | Battery pack |
| CN104900820B (en) * | 2015-06-12 | 2017-03-22 | 福建南平南孚电池有限公司 | Secondary electrochemical battery sealing body with encapsulated type chip shield structure and battery |
| JP7310096B2 (en) * | 2018-04-10 | 2023-07-19 | ソニーグループ株式会社 | Battery packs and electronic devices |
| WO2021070757A1 (en) * | 2019-10-08 | 2021-04-15 | 株式会社村田製作所 | Battery pack and electronic device |
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| CN101615701B (en) | 2012-05-30 |
| CN1828979A (en) | 2006-09-06 |
| CN101615701A (en) | 2009-12-30 |
| CN101615700B (en) | 2012-05-30 |
| CN101615699A (en) | 2009-12-30 |
| CN101615699B (en) | 2012-08-08 |
| CN101615700A (en) | 2009-12-30 |
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Effective date of registration: 20180419 Address after: Kyoto Japan Patentee after: Murata Manufacturing Co.,Ltd. Address before: Fukushima Patentee before: Murata, Northeast China Effective date of registration: 20180419 Address after: Fukushima Patentee after: Murata, Northeast China Address before: Tokyo, Japan Patentee before: Sony Corp. |