JP7542984B2 - Lead acid battery grid - Google Patents
Lead acid battery grid Download PDFInfo
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- JP7542984B2 JP7542984B2 JP2020073875A JP2020073875A JP7542984B2 JP 7542984 B2 JP7542984 B2 JP 7542984B2 JP 2020073875 A JP2020073875 A JP 2020073875A JP 2020073875 A JP2020073875 A JP 2020073875A JP 7542984 B2 JP7542984 B2 JP 7542984B2
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- 239000002253 acid Substances 0.000 title claims description 46
- 210000000988 bone and bone Anatomy 0.000 claims description 60
- 239000002184 metal Substances 0.000 claims description 40
- 238000005266 casting Methods 0.000 claims description 26
- 238000000034 method Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 230000007547 defect Effects 0.000 description 13
- 210000005069 ears Anatomy 0.000 description 10
- 230000005484 gravity Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011149 active material Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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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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- Cell Electrode Carriers And Collectors (AREA)
Description
本発明は、鉛蓄電池極板用格子体に関するものである。 The present invention relates to a grid for lead-acid battery plates.
鉛蓄電池は多数枚の極板を用いて構成された極板群と電解液を電槽内に収納して製造されている。用いられる極板は格子体にペースト状活物質を塗布充填して得られるが、この格子体は格子目形状の内骨とその外側を囲む枠骨と上枠骨から突設した耳部と、さらに必要に応じて耳部を形成した上枠骨とは対向する下枠骨に突設した足部とから構成される。 Lead-acid batteries are manufactured by storing a plate group consisting of many plates and an electrolyte in a battery case. The plates used are obtained by filling a grid with a paste-like active material, and this grid is composed of a grid-shaped inner frame, a frame surrounding the outside, ears protruding from the upper frame, and, if necessary, feet protruding from the lower frame that faces the upper frame with the ears formed on it.
鉛蓄電池用格子体の製造方法としては、従来から鋳造方式が使用されてきた。その中でもブックモールド式の鋳造方式が一般的である。ブックモールド式の鋳造方式は、通常、一対の板状の鋳型を使用し、一方の鋳型を固定鋳型として鋳造装置本体に対して移動しないように固定し、もう一方の鋳型を移動鋳型として、スライド装置等によって鋳造装置本体に対して前後に移動できるようにしたものである（特許文献１の図１９を参照）。これら固定鋳型の内面および移動鋳型の内面は、極板用格子体の基板形状に刻印されており、固定鋳型と移動鋳型とが突き合わされて形成された空間内（以下、「湯道」と記すこともある）に、湯口から溶融金属（以下、「溶湯」と記すこともある）が注ぎ込まれ、冷却凝固されることにより、鉛蓄電池用格子体が鋳造される（特許文献１の図２０を参照）。 Casting methods have been used as a manufacturing method for lead-acid battery grids. Among them, the book-mold casting method is the most common. The book-mold casting method usually uses a pair of plate-shaped molds, one of which is fixed as a fixed mold so as not to move relative to the casting device body, and the other is a movable mold that can be moved back and forth relative to the casting device body by a slide device or the like (see FIG. 19 of Patent Document 1). The inner surfaces of the fixed mold and the movable mold are engraved with the substrate shape of the electrode plate grid, and molten metal (hereinafter sometimes referred to as "molten metal") is poured from a sprue into the space (hereinafter sometimes referred to as "runner") formed by butting the fixed mold and the movable mold together, and the lead-acid battery grid is cast by cooling and solidifying (see FIG. 20 of Patent Document 1).
しかしながら、湯道に溶湯を流し込む際、溶湯の流れを制御することが難しく、耳部に対応する湯道は、格子目形状の内骨やその外側を囲む枠骨に対応する湯道と比較して大きく、耳部の奥側まで溶湯が流れ込みにくい。特にブックモールド式のように重力を利用して湯道に溶湯を流し込む鋳造方式においては、耳部のような湯道が他の部位と比較して大きい箇所にひけ巣や空孔、切れ目等の鋳造不良が発生しやすいという問題があった。 However, when pouring molten metal into the runners, it is difficult to control the flow of the molten metal, and the runners corresponding to the ears are larger than those corresponding to the lattice-shaped inner frame and the frame surrounding it, making it difficult for the molten metal to flow deep into the ears. In particular, in casting methods that use gravity to pour molten metal into the runners, such as the book mold method, there is a problem that casting defects such as shrinkage cavities, voids, and cuts are likely to occur in areas such as the ears where the runners are larger than other parts.
上記の問題を解決する方法として、特許文献２には、格子体の耳部と枠骨との接続部に凹部を形成し（特許文献２の図１および図５を参照）、溶湯の湯回りを改善して鋳造不良が発生することを抑制する方法が開示されている。しかしながら、特許文献２の凹部の形状では、凹部の上面または頂点が上枠骨の上面よりも上方に位置しており、湯道が狭くなっている。上記の形状では、耳部の奥側まで溶湯が流れ込みにくく、鋳造不良が発生する恐れがある。また、耳部の集電部分が減少するため、集電効率が減少し、出力特性の低下につながる恐れもある。さらには、格子体が負極板として使用される場合には、負極板の耳部の鉛が硫酸鉛に変質して耳痩せが生じる可能性もあり、耳部の破断が発生しやすくなる恐れもある。 As a method for solving the above problem, Patent Document 2 discloses a method of forming a recess at the connection between the ear of the grid and the frame (see Figures 1 and 5 of Patent Document 2), improving the flow of molten metal and suppressing the occurrence of casting defects. However, in the shape of the recess in Patent Document 2, the upper surface or apex of the recess is located above the upper surface of the upper frame, narrowing the runner. With the above shape, it is difficult for molten metal to flow to the back of the ear, which may cause casting defects. In addition, the current collecting portion of the ear is reduced, which may reduce the current collecting efficiency and lead to a decrease in output characteristics. Furthermore, when the grid is used as a negative electrode plate, the lead in the ear of the negative electrode plate may change to lead sulfate, causing ear thinning, and the ear may be more likely to break.
そこで本発明は上記事情を鑑み、ひけ巣や空孔、切れ目等の鋳造不良の発生が抑制された鉛蓄電池用格子体を提供することを目的とする。 In view of the above circumstances, the present invention aims to provide a grid for lead-acid batteries that suppresses the occurrence of casting defects such as shrinkage cavities, voids, and cuts.
横方向に延びる上枠骨および下枠骨と、縦方向に延びる左枠骨および右枠骨と、４つの枠骨により囲繞される領域内に配置され、上枠骨と下枠骨とに接続される複数の縦内骨と、左枠骨と右枠骨とに接続される複数の横内骨と、４つの枠骨と複数の縦内骨または横内骨とにより囲繞される領域、および複数の縦内骨と横内骨とによって囲繞される領域からなる複数の開口部と、上枠骨に突設される耳部と、を備える鋳造方式で作製した鉛蓄電池用格子体において、上枠骨と耳部との接続部に凹部を有し、凹部は、耳部の直下に位置する少なくとも１つの開口部に耳部側へ延設するように設けられており、凹部が上枠骨の上面から下面までの範囲内に位置することを特徴とするものである。
The grid for a lead-acid battery is manufactured by a casting method and comprises upper and lower frame bones extending horizontally, left and right frame bones extending vertically, a number of vertical inner bones connected to the upper and lower frame bones, a number of horizontal inner bones connected to the left and right frame bones, a number of openings consisting of an area surrounded by the four frame bones and the multiple vertical inner bones or horizontal inner bones, and an area surrounded by the multiple vertical inner bones and horizontal inner bones, and an ear portion protruding from the upper frame bone.The grid for a lead-acid battery is manufactured by a casting method and comprises upper and lower frame bones extending horizontally, a number of vertical inner bones connected to the upper and lower frame bones, a number of horizontal inner bones connected to the left and right frame bones, a number of openings consisting of an area surrounded by the four frame bones and the multiple vertical inner bones or horizontal inner bones, and an area surrounded by the multiple vertical inner bones and horizontal inner bones, and an ear portion protruding from the upper frame bone.The grid for a lead-acid battery is characterized in that it has a recess at the connection between the upper frame and the ear portion, and the recess is provided in at least one opening located directly below the ear portion so as to extend toward the ear portion, and is located within a range from the top to the bottom surface of the upper frame bone.
また、上枠骨の幅寸法に対する、上枠骨の上面から凹部の上面または頂点までの長さの比が０．２以上０．８以下であることが好ましい。 It is also preferable that the ratio of the length from the top surface of the upper frame to the top surface or apex of the recess to the width dimension of the upper frame be 0.2 or more and 0.8 or less.
さらには、上枠骨と耳部との接続部は、第１の接続点と第２の接続点とを有し、凹部は、溶湯流れ方向の上流側に位置する第１の接続点から溶湯流れ方向の下流側に位置する第２の接続点までの長さ寸法の２／３以内までの位置に設けられていることが好ましい。 Furthermore, it is preferable that the connection portion between the upper frame and the ear portion has a first connection point and a second connection point, and the recess is provided at a position within 2/3 of the length dimension from the first connection point located upstream in the molten metal flow direction to the second connection point located downstream in the molten metal flow direction.
本発明に係る鉛蓄電池用格子体によれば、上枠骨と耳部との接続部に凹部を形成することで、溶湯が湯道を流れる際、湯道が枠骨および内骨よりも大きい耳部に溶湯を流しやすくなり、耳部の奥側まで溶湯が回ることで、ひけ巣や空孔、切れ目等の鋳造不良の発生を抑制することができる。 In the lead-acid battery grid of the present invention, by forming a recess at the connection between the upper frame and the lug, when the molten metal flows through the runner, the runner can easily direct the molten metal through the lug, which is larger than the frame and inner frame, and the molten metal can reach the back of the lug, thereby preventing the occurrence of casting defects such as shrinkage cavities, voids, and cuts.
以下の図面の記載において、同一符号は同一構成部材を示す。ただし、図面は模式的なものであり、厚みと平面寸法との関係、各部材の厚みの比率等は現実のものとは異なり得る。また、図面相互間においても互いの寸法の関係や比率等が異なり得る。 In the following drawings, the same reference numerals indicate the same components. However, the drawings are schematic, and the relationship between thickness and planar dimensions, the thickness ratio of each component, etc. may differ from the actual ones. Furthermore, the dimensional relationships and ratios between the drawings may differ.
以下の図面の記載では、Ｘ軸方向およびＹ軸方向を用いて、方向を示す場合がある。例えば、Ｘ軸方向は、後述する上枠骨の長手方向である。Ｙ軸方向は、後述する上枠骨の幅方向である。 In the following drawings, directions may be indicated using the X-axis and Y-axis directions. For example, the X-axis direction is the longitudinal direction of the upper frame bone, which will be described later. The Y-axis direction is the width direction of the upper frame bone, which will be described later.
本発明の実施形態を、図を用いて説明する。尚、以下に説明する実施形態は本発明の一例を示したものであって、本発明は本実施形態に限定されるものではない。また、本実施形態には種々の変更または改良を加えることが可能であり、そのような変更または改良を加えた形態も本発明に含まれ得る。 An embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is merely an example of the present invention, and the present invention is not limited to this embodiment. In addition, various modifications and improvements can be made to this embodiment, and forms incorporating such modifications or improvements can also be included in the present invention.
図１は、本発明の実施形態に係る鉛蓄電池用格子体の耳部の直下に位置する開口部近傍を拡大した平面図である。図２（ａ）～（ｅ）は、図１の凹部の変形例である。図３は、本発明の実施形態に係る鉛蓄電池用格子体の足部の直上に位置する開口部近傍を拡大した平面図である。図４は、従来の鉛蓄電池用格子体を示した平面図である。 Figure 1 is an enlarged plan view of the vicinity of an opening located directly below the ear of a lead-acid battery grid according to an embodiment of the present invention. Figures 2(a) to (e) are modified examples of the recess in Figure 1. Figure 3 is an enlarged plan view of the vicinity of an opening located directly above the foot of a lead-acid battery grid according to an embodiment of the present invention. Figure 4 is a plan view showing a conventional lead-acid battery grid.
先ず、本発明の鉛蓄電池用格子体１と従来の鉛蓄電池用格子体１０とで共通する構成について、図４を参照しながら説明する。本発明の鉛蓄電池用格子体１と従来の鉛蓄電池用格子体１０とは、枠骨と、枠骨内に配置される内骨と、耳部３とを備えている。枠骨は、矩形枠状であって、横方向（Ｘ軸方向）に延びる上枠骨１１および下枠骨１２と、縦方向（Ｙ軸方向）に延びる左枠骨１３および右枠骨１４と、を備えている。
尚、本明細書中では、「上枠骨１１および下枠骨１２が延びる方向」を横方向（以下、「Ｘ軸方向」と記すこともある）、「左枠骨１３および右枠骨１４が延びる方向」を縦方向（以下、「Ｙ軸方向」と記すこともある）と定義する。また、「上枠骨１１が配置される部位」を上側、「下枠骨１２が配置される部位」を下側、「左枠骨１３が配置される部位」を左側、「右枠骨１３が配置される部位」を右側と定義する。
First, a common configuration between the lead-acid battery grid 1 of the present invention and the conventional lead-acid battery grid 10 will be described with reference to Fig. 4. The lead-acid battery grid 1 of the present invention and the conventional lead-acid battery grid 10 each include a frame, an inner frame disposed within the frame, and a lug 3. The frame is rectangular and includes an upper frame 11 and a lower frame 12 extending in the horizontal direction (X-axis direction), and a left frame 13 and a right frame 14 extending in the vertical direction (Y-axis direction).
In this specification, the "direction in which the upper frame bone 11 and the lower frame bone 12 extend" is defined as the horizontal direction (hereinafter sometimes referred to as the "X-axis direction"), and the "direction in which the left frame bone 13 and the right frame bone 14 extend" is defined as the vertical direction (hereinafter sometimes referred to as the "Y-axis direction"). Furthermore, the "area where the upper frame bone 11 is disposed" is defined as the upper side, the "area where the lower frame bone 12 is disposed" is defined as the lower side, the "area where the left frame bone 13 is disposed" is defined as the left side, and the "area where the right frame bone 13 is disposed" is defined as the right side.
枠骨内には、枠骨と接続して、格子状に配列される複数の縦内骨１５および横内骨１６を備える内骨が配置されている。複数の縦内骨１５および横内骨１６は、例えば互いに直角に交差して配置されている。鉛蓄電池電池用格子体１において、複数の開口部２は枠骨と複数の縦内骨１５および横内骨１６とによって囲繞される領域、および複数の縦内骨１５および横内骨１６によって囲繞される領域からなる。複数の開口部２は、それぞれ矩形状を有する。尚、複数の開口部２を平面視した形状は上記に限定されず、例えば斜めの内骨が入る場合などには、台形や三角形等、その他の多角形であっても良い。 Inside the frame, an inner frame is arranged that is connected to the frame and has a number of vertical inner bones 15 and horizontal inner bones 16 arranged in a lattice pattern. The vertical inner bones 15 and horizontal inner bones 16 are arranged, for example, crossing each other at right angles. In the lead-acid battery grid 1, the multiple openings 2 consist of an area surrounded by the frame and the vertical inner bones 15 and horizontal inner bones 16, and an area surrounded by the vertical inner bones 15 and horizontal inner bones 16. Each of the multiple openings 2 has a rectangular shape. Note that the shape of the multiple openings 2 in a plan view is not limited to the above, and may be other polygonal shapes such as trapezoids and triangles, for example, when an oblique inner bone is inserted.
また、鉛蓄電池用格子体１を外部に接続するために耳部３を有し、耳部３は上枠骨１１の接続部１７から上側に突設されており、図４では上枠骨１１の右側に位置している。
尚、本明細書中では「接続部１７」を上枠骨１１の上面（上辺）および下面（下辺）をＸ軸方向に延長した線と、上枠骨１１と耳部３との接続点ＡおよびＢからＹ軸の負の方向へ下ろした垂線とで囲繞される領域と定義する。
In addition, the lead-acid battery grid 1 has a lug 3 for connecting to the outside, and the lug 3 protrudes upward from the connection portion 17 of the upper frame 11, and is located to the right of the upper frame 11 in Figure 4.
In this specification, the "connection portion 17" is defined as the area surrounded by a line extending from the upper surface (upper edge) and lower surface (lower edge) of the upper frame bone 11 in the X-axis direction and a perpendicular line drawn down in the negative direction of the Y-axis from connection points A and B between the upper frame bone 11 and the ear portion 3.
以上が本発明の鉛蓄電池用格子体１と従来の鉛蓄電池用格子体１０とで共通する構成であり、以下に本発明の鉛蓄電池用格子体１の特徴である構成について、図を参照しながら説明する。 The above is the common configuration between the lead acid battery grid 1 of the present invention and the conventional lead acid battery grid 10. Below, the configuration that is characteristic of the lead acid battery grid 1 of the present invention will be explained with reference to the drawings.
図１に示すように、本発明の鉛蓄電池用格子体１において、上枠骨１１と耳部３との接続部１７に凹部５が設けられており、凹部５は、耳部３の直下に位置する少なくとも１つの開口部２１に耳部３側へ延設するように設けられており、上枠骨１１の上面（上辺）から下面（下辺）までの範囲内に位置する。
尚、本明細書中では「耳部３の直下に位置する少なくとも１つの開口部２１」を複数の開口部２のうち、上枠骨１１に隣接し、かつ上枠骨１１と耳部３との接続点Ａから接続点Ｂまでの長さ寸法Ｗ３（以下、「接続点Ａ－Ｂ間の長さ寸法Ｗ３」と記すこともある）内に位置する開口部２と定義する。
鉛蓄電池用格子体１をこのような構成にすることで、鉛蓄電池用格子体１の鋳造方式において、溶湯が上枠骨１１と耳部３との接続部１７に対応する湯道に流れ込む際、溶湯が凹部５を伝うことで、耳部３側（上側）への湯流れが発生する。そのため、湯道が枠骨および内骨よりも大きい耳部３へ溶湯を流しやすくなり、耳部３の奥側まで溶湯を流し込むことができ、ひけ巣や空孔、切れ目等の鋳造不良の発生を抑制することができる。
As shown in FIG. 1, in the lead-acid battery grid 1 of the present invention, a recess 5 is provided at a connection portion 17 between the upper frame 11 and the ear portion 3, and the recess 5 is provided so as to extend toward the ear portion 3 in at least one opening 21 located directly below the ear portion 3, and is located within the range from the upper surface (upper edge) to the lower surface (lower edge) of the upper frame 11.
In this specification, "at least one opening 21 located directly below the ear portion 3" is defined as an opening 2 among the multiple openings 2 that is adjacent to the upper frame 11 and is located within the length dimension W 3 from connection point A to connection point B between the upper frame 11 and the ear portion 3 (hereinafter sometimes referred to as "length dimension W 3 between connection points A and B").
By configuring the lead-acid battery grid 1 in this way, in the casting method of the lead-acid battery grid 1, when the molten metal flows into the runner corresponding to the connection 17 between the upper frame 11 and the lug 3, the molten metal runs down the recess 5, causing a flow of the molten metal toward the lug 3 (upward). Therefore, the runner makes it easier for the molten metal to flow into the lug 3, which is larger than the frame and inner frame, and the molten metal can flow all the way to the back of the lug 3, thereby suppressing the occurrence of casting defects such as shrinkage cavities, voids, and cuts.
図１に示すように、鉛蓄電池用格子体１において、鋳型の湯道に溶湯を流し込む湯口が、鉛蓄電池用格子体１の右側に配置される場合、溶湯流れ方向Ｍは左方向である。この場合において、より確実に溶湯の湯回りを改善し、耳部３の鋳造不良を抑制する効果を得るためには、凹部５は、溶湯流れ方向Ｍの上流側（右側）に位置する接続点Ａから溶湯流れ方向Ｍの下流側（左側）に位置する接続点Ｂにかけて、接続点Ａ－Ｂ間の長さ寸法Ｗ３の２／３以内までの位置に設けられているのが好ましい。一方、湯口が鉛蓄電池用格子体１の左側に配置される場合は、溶湯流れ方向Ｍが右方向であるため、凹部５は、接続点Ｂ（左側）から接続点Ａ（右側）にかけて、接続点Ｂ－Ａ間の長さ寸法Ｗ３の２／３以内までの位置に設けられているのが好ましい。
尚、本明細書中では「溶湯流れ方向Ｍ」を、鋳型の湯道に溶湯が流れ込む際の溶湯の進行方向と定義する。
As shown in FIG. 1, in the lead-acid battery grid 1, when the gate for pouring the molten metal into the runner of the mold is located on the right side of the lead-acid battery grid 1, the molten metal flow direction M is the left direction. In this case, in order to more reliably improve the flow of the molten metal and suppress the casting defects of the ear portion 3, it is preferable that the recess 5 is provided at a position within 2/3 of the length dimension W 3 between the connection points A and B from the connection point A located on the upstream side (right side) of the molten metal flow direction M to the connection point B located on the downstream side (left side) of the molten metal flow direction M. On the other hand, when the gate is provided on the left side of the lead-acid battery grid 1, since the molten metal flow direction M is the right direction, it is preferable that the recess 5 is provided at a position within 2/3 of the length dimension W 3 between the connection points B and A from the connection point B (left side) to the connection point A (right side).
In this specification, the "molten metal flow direction M" is defined as the direction in which the molten metal advances as it flows into the runner of the mold.
また、上枠骨１１の幅寸法Ｗ１１に対する上枠骨１１の上面（上辺）から凹部５の上面または頂点までの長さＬの比Ｌ／Ｗ１１が、０．２以上０．８以下であると、溶湯が流れ込む湯道を十分に確保しつつ、耳部３への湯回りがさらに改善され、ひけ巣や空孔、切れ目等の鋳造不良の発生をさらに抑制することができるため、より好ましい。さらには、Ｌ／Ｗ１１が０．３以上０．７以下であるのがより好ましい。
尚、本明細書中では「上枠骨１１の幅寸法Ｗ１１」を上枠骨１１の上面（上辺）と下面（下辺）とが平行である部分の上枠骨１１の上面（上辺）から下面（下辺）までの長さと定義する。
Furthermore, when the ratio L/ W11 of the length L from the upper surface (upper edge) of the upper frame 11 to the upper surface or apex of the recess 5 to the width dimension W11 of the upper frame 11 is 0.2 or more and 0.8 or less, this is more preferable because it further improves the flow of the molten metal to the edge portion 3 while sufficiently securing a channel for the molten metal to flow, and further suppresses the occurrence of casting defects such as shrinkage cavities, voids, and discontinuities. Furthermore, it is even more preferable for L/ W11 to be 0.3 or more and 0.7 or less.
In this specification, the "width dimension W 11 of the upper frame 11" is defined as the length from the upper surface (upper edge) to the lower surface (lower edge) of the upper frame 11 at the portion where the upper surface (upper edge) and the lower surface (lower edge) of the upper frame 11 are parallel.
また、図２（ａ）、（ｂ）に示すように凹部５の数は特に限定されない。さらには、複数の凹部５を有する場合、全ての凹部５が上枠骨１１と耳部３との接続部１７内に位置していれば上枠骨１１の上面（上辺）から凹部５の上面または頂点までの長さは同一でも良く、同一でなくても良い。尚、上枠骨１１の上面（上辺）から複数の凹部５の上面または頂点までの長さが同一でない場合は、溶湯流れ方向Ｍの上流側から、上枠骨１１の上面（上辺）から凹部５の上面または頂点までの長さが小さくなるように階段状に設けるのが好ましい。 In addition, as shown in Figures 2(a) and (b), the number of recesses 5 is not particularly limited. Furthermore, when there are multiple recesses 5, as long as all of the recesses 5 are located within the connection portion 17 between the upper frame 11 and the ear portion 3, the length from the upper surface (upper edge) of the upper frame 11 to the upper surface or apex of the recesses 5 may or may not be the same. If the length from the upper surface (upper edge) of the upper frame 11 to the upper surfaces or apexes of the multiple recesses 5 is not the same, it is preferable to provide them in a stepped manner so that the length from the upper surface (upper edge) of the upper frame 11 to the upper surface or apex of the recesses 5 becomes smaller from the upstream side of the molten metal flow direction M.
さらには、図２（ｃ）に示すように、凹部５の長さ寸法を開口部２１の長さ寸法と同一な長さにしても良い。尚、凹部５の長さ寸法は特に限定されないが、より確実に、溶湯の湯回りを改善し、耳部３の鋳造不良を抑制する効果を得るためには、開口部２１の最大長さ寸法に対する凹部５の長さ寸法の比が０．４以上であることが好ましい。
尚、本明細書中では「開口部２の最大長さ寸法」を開口部２の横方向（Ｘ軸方向）の長さが最長である部分の長さと定義し、「凹部５の長さ寸法」を、凹部５の凹形状の始点から終点までの横方向（Ｘ軸方向）の長さと定義する。
2(c), the length of the recess 5 may be the same as the length of the opening 21. Although the length of the recess 5 is not particularly limited, in order to more reliably improve the running of the molten metal and suppress casting defects in the ear portion 3, it is preferable that the ratio of the length of the recess 5 to the maximum length of the opening 21 is 0.4 or more.
In this specification, the "maximum length dimension of the opening 2" is defined as the length of the longest part of the opening 2 in the horizontal direction (X-axis direction), and the "length dimension of the recess 5" is defined as the length in the horizontal direction (X-axis direction) from the start point to the end point of the concave shape of the recess 5.
尚、図２（ｄ）、（ｅ）に示すように、凹部５を平面視した際の形状は特に限定されず、平面視した凹部５の形状が、孤形状でも良く、三角形状でも良く、溶湯が凹部５を伝って、耳部３側（上側）への湯流れを発生させることができる形状であれば良い。 As shown in Figures 2(d) and (e), the shape of the recess 5 when viewed in a plane is not particularly limited, and the shape of the recess 5 when viewed in a plane may be an arc shape or a triangular shape, as long as the molten metal can flow down the recess 5 and generate a flow of molten metal toward the ear portion 3 (upper side).
また、図３に示すように鉛蓄電池用格子体１において、極板群を電槽内に収納した際に電槽の鞍部に当接させる足部４を下枠骨１２に突設させる場合、耳部の直下の開口部に設けた凹部と同様に、下枠骨１２と足部４との接続部１８に凹部５を設けても良く、凹部５は、足部４の直上に位置する少なくとも１つの開口部２２に延設するように設けられており、下枠骨１２の上面（上辺）から下面（下辺）までの範囲内に位置する。
尚、本明細書中では「接続部１８」を下枠骨１２の上面（上辺）および下面（下辺）をＸ軸方向に延長した線と、下枠骨１２と足部４との接続点ＣおよびＤからＹ軸の正の方向へ延ばした垂線とで囲繞される領域と定義し、「足部４の直上に位置する開口部２２」を複数の開口部２のうち、下枠骨１２に隣接し、かつ下枠骨１２と足部４との接続点Ｃから接続点Ｄまでの長さ寸法Ｗ４内に位置する開口部２と定義する。
このような構成にすることで、耳部に加えて、足部４における、ひけ巣や空孔、切れ目等の鋳造不良の発生を抑制することができる。
Furthermore, in the lead-acid battery grid 1 as shown in FIG. 3, when the foot 4 that will abut the saddle portion of the battery case when the plate group is stored in the battery case is protruded from the lower frame 12, a recess 5 may be provided in the connection portion 18 between the lower frame 12 and the foot 4, similar to the recess provided in the opening directly below the ear portion, and the recess 5 is provided so as to extend into at least one opening 22 located directly above the foot 4, and is located within the range from the upper surface (upper edge) to the lower surface (lower edge) of the lower frame 12.
In this specification, the "connection portion 18" is defined as the area surrounded by a line extending from the upper surface (upper edge) and lower surface (lower edge) of the lower frame 12 in the X-axis direction and a perpendicular line extending in the positive direction of the Y-axis from connection points C and D between the lower frame 12 and the foot portion 4, and the "opening 22 located directly above the foot portion 4" is defined as one of the multiple openings 2 that is adjacent to the lower frame 12 and is located within the length dimension W4 from connection point C to connection point D between the lower frame 12 and the foot portion 4.
By adopting such a configuration, it is possible to suppress the occurrence of casting defects such as shrinkage cavities, voids, and discontinuities in the foot portion 4 as well as the ear portions.
尚、本発明に係る実施形態に係る鉛蓄電池用格子体１は、正極格子体に用いても良く、負極格子体に用いても良い。 The lead-acid battery grid 1 according to the embodiment of the present invention may be used as a positive electrode grid or a negative electrode grid.
その他、本発明は前記実施形態に限らず、本発明の趣旨を逸脱しない限り、前述した構成を適宜組み合わせても良い。 In addition, the present invention is not limited to the above-described embodiments, and the above-described configurations may be combined as appropriate without departing from the spirit of the present invention.
次に、本発明の実施例について説明する。但し、本発明は以下の実施例に限定されるものではない。 Next, examples of the present invention will be described. However, the present invention is not limited to the following examples.
（実施例１）
本発明の図１の実施形態に係る鉛蓄電池用格子体１を、ブックモールド式の鋳造方式で作製した。図１の凹部５の形状となるような鋳型を用意して、湯口を鉛蓄電池用格子体１の右側に設け、重力を利用して溶湯を湯道に流し込み、冷却凝固して、鉛蓄電池用格子体１を鋳造し、実施例１とした。凹部５は、上枠骨１１の幅寸法Ｗ１１と上枠骨１１の上面（上辺）から凹部５の上面までの長さＬとがＬ／Ｗ１１＝０．５の条件を満たすように設けた。
Example 1
The lead-acid battery grid 1 according to the embodiment of Fig. 1 of the present invention was produced by a book mold casting method. A mold having the shape of the recess 5 in Fig. 1 was prepared, a sprue was provided on the right side of the lead-acid battery grid 1, and molten metal was poured into the runner by utilizing gravity, cooled and solidified, and the lead-acid battery grid 1 was cast as Example 1. The recess 5 was provided so that the width W11 of the upper frame 11 and the length L from the top surface (upper edge) of the upper frame 11 to the top surface of the recess 5 satisfied the condition L/ W11 = 0.5.
（従来例）
図４に示すように、凹部がない形状の鉛蓄電池用格子体１０をブックモールド式の鋳造方式で作製し、従来例とした。
(Conventional example)
As shown in FIG. 4, a grid 10 for a lead-acid battery having no recesses was produced by a book mold casting method as a conventional example.
上記の実施例１および従来例の鉛蓄電池用格子体をそれぞれ１０００枚製造して、耳部の鋳造不良を判定した。 1,000 grids for lead-acid batteries were manufactured for each of the above Example 1 and the conventional example, and casting defects in the ears were evaluated.
実施例１の鉛蓄電池用格子体１において、製造された１０００枚の格子体の耳部３に鋳造不良が認められなかった。これは、凹部５を設けたことにより、格子体の鋳造方式において、溶湯が上枠骨１１と耳部３との接続部１７に対応する湯道に流れ込む際、溶湯が凹部５を伝うことで、耳部３側（上側）への湯流れを発生させることができ、耳部３の奥側まで確実に溶湯を流し込むことができたためである。 In the lead-acid battery grid 1 of Example 1, no casting defects were found in the ears 3 of the 1,000 grids manufactured. This is because the recesses 5 are provided, and when the molten metal flows into the runner corresponding to the connection 17 between the upper frame 11 and the ears 3 in the casting method of the grid, the molten metal runs down the recesses 5, causing a flow of metal toward the ears 3 (upper side), and the molten metal can be reliably poured all the way to the back of the ears 3.
一方、従来例の鉛蓄電池用格子体１０において、製造された１０００枚の格子体のうち、３０枚に鋳造不良が認められた。 On the other hand, in the conventional lead-acid battery grid 10, 30 out of 1,000 grids manufactured were found to have casting defects.
１ 鉛蓄電池用格子体
１１ 上枠骨
１２ 下枠骨
１３ 左枠骨
１４ 右枠骨
１５ 縦内骨
１６ 横内骨
１７、１８ 接続部
Ａ、Ｂ、Ｃ、Ｄ 接続点
２ 開口部
２１ 耳部直下の開口部
２２ 足部直上の開口部
３ 耳部
４ 足部
５ 凹部
Ｍ 溶湯流れ方向
Ｗ１１ 上枠骨の幅寸法
Ｗ３、Ｗ４ 接続部の長さ寸法
Ｌ 上枠骨の上面から凹部の上面または頂点までの長さ寸法
1 Lead-acid battery grid 11 Upper frame 12 Lower frame 13 Left frame 14 Right frame 15 Vertical inner frame 16 Horizontal inner frame 17, 18 Connection parts A, B, C, D Connection points 2 Opening 21 Opening directly below ear 22 Opening directly above foot 3 Ear 4 Foot 5 Recess M Molten metal flow direction W 11 Width dimensions W3 , W4 of upper frame Length dimension L of connection part Length dimension from the top surface of the upper frame to the top surface or apex of the recess
Claims (3)
縦方向に延びる左枠骨および右枠骨と、
前記４つの枠骨により囲繞される領域内に配置され、前記上枠骨と前記下枠骨とに接続される複数の縦内骨と、前記左枠骨と前記右枠骨とに接続される複数の横内骨と、
前記４つの枠骨と複数の前記縦内骨または前記横内骨とにより囲繞される領域、および複数の前記縦内骨と前記横内骨とによって囲繞される領域からなる複数の開口部と、
前記上枠骨に突設される耳部と、を備える鋳造方式で作製した鉛蓄電池用格子体において、
前記上枠骨と前記耳部との接続部に凹部を有し、
前記凹部は、前記耳部の直下に位置する少なくとも１つの前記開口部に前記耳部側へ延設するように設けられており、
前記凹部が前記上枠骨の上面から下面までの範囲内に位置することを特徴とする鉛蓄電池用格子体。 Upper and lower frame bones extending laterally;
A left frame bone and a right frame bone extending in the vertical direction;
A plurality of vertical inner bones are arranged within an area surrounded by the four frame bones, and are connected to the upper frame bone and the lower frame bone, and a plurality of horizontal inner bones are connected to the left frame bone and the right frame bone.
A plurality of openings each including an area surrounded by the four frame bones and a plurality of the vertical bones or the horizontal bones, and an area surrounded by a plurality of the vertical bones and the horizontal bones;
A grid for a lead-acid battery manufactured by a casting method , the grid comprising: a lug portion protruding from the upper frame;
A recess is provided at a connection portion between the upper frame and the ear portion,
The recess is provided in at least one of the openings located directly below the ear portion so as to extend toward the ear portion,
2. A grid for a lead-acid battery, wherein the recess is located within a range from the upper surface to the lower surface of the upper frame.
前記凹部は、溶湯流れ方向の上流側に位置する前記第１の接続点から前記溶湯流れ方向の下流側に位置する前記第２の接続点までの長さ寸法の２／３以内までの位置に設けられていることを特徴とする請求項１または２に記載の鉛蓄電池用格子体。 the connection portion has a first connection point and a second connection point,
3. The lead-acid battery grid according to claim 1, wherein the recess is provided at a position within 2/3 of a length from the first connection point located upstream in the molten metal flow direction to the second connection point located downstream in the molten metal flow direction.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994015375A1 (en) | 1992-12-28 | 1994-07-07 | Yuasa Corporation | Expanded net, method for its manufacture, and plate for lead storage battery |
| JP2003297368A (en) | 2002-03-29 | 2003-10-17 | Yuasa Corp | Lattice for lead acid storage battery electrode plate and manufacturing method for lattice |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1994015375A1 (en) | 1992-12-28 | 1994-07-07 | Yuasa Corporation | Expanded net, method for its manufacture, and plate for lead storage battery |
| JP2003297368A (en) | 2002-03-29 | 2003-10-17 | Yuasa Corp | Lattice for lead acid storage battery electrode plate and manufacturing method for lattice |
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