WO2010087040A1 - 安全弁とその製造方法,密閉型電池とその製造方法,車両,電池搭載機器 - Google Patents
安全弁とその製造方法,密閉型電池とその製造方法,車両,電池搭載機器 Download PDFInfo
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- WO2010087040A1 WO2010087040A1 PCT/JP2009/059562 JP2009059562W WO2010087040A1 WO 2010087040 A1 WO2010087040 A1 WO 2010087040A1 JP 2009059562 W JP2009059562 W JP 2009059562W WO 2010087040 A1 WO2010087040 A1 WO 2010087040A1
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- groove
- safety valve
- measurement
- battery
- sealed
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/342—Non-re-sealable arrangements
- H01M50/3425—Non-re-sealable arrangements in the form of rupturable membranes or weakened parts, e.g. pierced with the aid of a sharp member
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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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- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49412—Valve or choke making with assembly, disassembly or composite article making
- Y10T29/49416—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting
- Y10T29/49417—Valve or choke making with assembly, disassembly or composite article making with material shaping or cutting including molding or casting
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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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49405—Valve or choke making
- Y10T29/49426—Valve or choke making including metal shaping and diverse operation
Definitions
- the present invention relates to a safety valve that is provided in a battery case and is cleaved when the internal pressure of the battery rises, and a manufacturing method thereof. Further, it extends to a sealed battery in which a safety valve is formed, a manufacturing method thereof, a vehicle equipped with the sealed battery, and a battery-equipped device. More specifically, the present invention relates to a safety valve in which a cleavage groove is formed in a valve portion by a press and a manufacturing method thereof, a sealed battery and a manufacturing method thereof, a vehicle, and a battery-equipped device.
- some sealed batteries have a safety valve on the outer surface.
- the safety valve opens when the internal pressure of the battery rises beyond the allowable range. Thereby, it becomes an opening for exhausting internal gas and the like. Therefore, it is required that the valve opening pressure is as intended.
- a valve in which a thin portion is formed and a thinner groove portion is formed therein has been proposed.
- the above-described conventional safety valve has a problem that it is difficult to measure the groove depth if the groove width is extremely small. In order to confirm whether the valve opening pressure is appropriate, it is necessary to know the remaining thickness of the groove. And in order to know this remaining plate thickness by nondestructive inspection, it is required to accurately acquire the groove depth of the groove portion.
- the irradiated laser light is scattered by the side wall of the groove portion, so that accurate measurement cannot be performed.
- the present invention has been made in order to solve the problems of the conventional techniques described above.
- the problem is to provide a safety valve and its manufacturing method, a sealed battery and its manufacturing method, a vehicle, and a battery-equipped device that can reliably assure quality as well as having small variations in valve opening pressure and stable quality. There is to do.
- a safety valve according to one aspect of the present invention which has been made for the purpose of solving this problem, is a safety valve that is provided in a battery case of a sealed battery that contains a power generation element and is sealed, and has a cleavage groove. In part, a measurement groove wider than the other part is formed.
- the measurement groove is partially formed in the cleavage groove. Since the measurement groove is wider than other portions, the groove depth can be measured by a known measurement method using, for example, laser light.
- the cleavage grooves other than the measurement groove may be narrow enough to make it difficult to measure the groove depth.
- the cleavage groove other than the measurement groove provides a stable quality safety valve with small variations in valve opening pressure, and a safety valve that ensures quality assurance by measuring the measurement groove.
- a method of manufacturing a safety valve provided in a battery case of a sealed battery that contains a power generation element therein and is sealed, and includes a convex portion that forms a cleavage groove, and a portion of the convex portion.
- the second step of measuring the depth of the measurement groove, and if the measurement groove depth obtained in the second step is a value within a predetermined range This is a method for manufacturing a safety valve including a third step of determining and rejecting a defective product.
- the cleavage groove and the measurement groove are formed at the same time in the first step.
- the groove depth of the measurement groove is measured. Since they are formed simultaneously by one mold, the groove depth of the cleavage groove can be determined by measuring the groove depth of the measurement groove. Furthermore, based on the measurement result in the second step, it is determined in the third step whether the product is non-defective. Further, if it is determined that the product is defective, it is eliminated. Therefore, it is a safety valve with guaranteed quality.
- a mold having wide portions formed at a plurality of convex portions is used as the mold, and in the second step, the depth of the measurement grooves at the plurality of locations is set.
- the depths of the measurement grooves at a plurality of locations are all within a predetermined range, and the difference between the depths is a value within a predetermined upper limit. In some cases, it is determined that the product is a non-defective product, and in other cases, it is determined that the product is defective and is rejected. In this case, it is possible to easily eliminate the case where the cleavage groove having the groove depth partially outside the allowable range due to the inclination of the mold is formed.
- Still another aspect of the present invention is a sealed battery which is sealed by housing a power generation element inside the battery case, and the battery case has a safety valve in which a cleavage groove is formed.
- measurement grooves are provided at a plurality of locations of the cleavage grooves.
- a method for manufacturing a sealed battery in which a power generation element is housed and sealed in a battery case provided with a safety valve.
- the safety valve is formed by forming a cleavage groove and a part of the measurement groove wider than the other part by pressing with a mold in which a part having a part wider than the other part is pressed.
- the first step of forming the measurement groove, the second step of measuring the depth of the measurement groove, and the measurement groove depth obtained in the second step is determined to be a non-defective product if the value is within a predetermined range.
- a third step of determining and rejecting the defective product as a defective product in other cases is provided.
- the first step a mold having wide portions formed at a plurality of convex portions is used as the mold, and in the second step, the depth of the measurement grooves at the plurality of locations is used.
- the depths of the measurement grooves at a plurality of locations are all within a predetermined range, and the difference between the depths is within a predetermined upper limit value. If it is a value, it is determined that the product is non-defective, and if not, it is determined that the product is defective and is rejected.
- Still another embodiment of the present invention is a vehicle or a battery-equipped device on which the above sealed battery is mounted.
- the valve opening pressure variation is small, the quality is stable, and quality assurance can be assured.
- the present invention is applied to a safety valve provided in a case of a flat-type lithium ion secondary battery.
- the secondary battery 10 of the present embodiment has a power generation element 16 stored in a battery case 11.
- the battery case 11 has a box-shaped main body 13 having an opening on one side and a sealing plate 12 that seals the one side.
- a positive electrode terminal 14 and a negative electrode terminal 15 which are external electrode terminals are respectively attached to the upper portion of the sealing plate 12 in the figure so as to protrude.
- the positive terminal 14 and the negative terminal 15 are connected to positive and negative electrode plates included in the power generation element 16, respectively.
- the safety valve 18 and the liquid injection part 19 are formed in the position between both the terminals 14 and 15 in the sealing board 12.
- FIG. 2 is a plan view of a portion of the safety valve 18.
- 3 is a cross-sectional view taken along the line AA in FIG. 4 is a cross-sectional view taken along the line BB in FIG.
- the safety valve 18 is a thin plate portion whose outer shape is substantially rectangular in plan view.
- the safety valve 18 is formed integrally with the sealing plate 12 in the surface of the sealing plate 12.
- the main body 13 and the sealing plate 12 of the battery case 11 are each formed of a metal plate such as aluminum or iron.
- the safety valve 18 of this embodiment is a portion that is formed thinner than the surrounding sealing plate 12 as shown in FIGS. Furthermore, in this embodiment, as shown in FIG. 2, the safety valve 18 is formed with a continuous cleavage groove 21 having a shape in which two Y-shaped legs are connected in opposite directions. The cleavage groove 21 is a recess provided in the range of the safety valve 18 as shown in FIGS.
- the cleavage groove 21 of this embodiment has a central groove 22 along the longitudinal direction of the sealing plate 12 and four oblique grooves 23 extending from both ends thereof toward the four corners of the safety valve 18. ing. Further, the central groove 22 is formed with a measurement groove 24 which is a part where the groove width is partially increased. The measurement groove 24 is a substantially circular range provided at two locations separated in the longitudinal direction of the central groove 22.
- the safety valve 18 is for cleaving and releasing gas when the internal pressure rises excessively during use of the secondary battery 10. For this reason, it is required that the internal pressure for opening (valve opening pressure) is within an appropriate range. Note that it is generally from the central groove 22 that cleaves. Then, the four portions S of the safety valve 18 other than the cleavage groove 21 are deformed and opened so as to be raised toward the outside of the battery case.
- the remaining plate thickness at the deepest portion of the cleavage groove 21, particularly the central groove 22 suffices to be within an appropriate range. Therefore, as shown in FIGS. 3 and 4, the remaining plate thickness (hereinafter referred to as groove thickness) T of the central groove 22 is set within an appropriate range based on the relationship with the pressure receiving area of the safety valve 18. . It is not preferable that the groove thickness T of the cleavage groove 21 is too large or too small. In this embodiment, the groove thickness T of the cleavage groove 21 is, for example, about several tens of ⁇ m.
- the groove width of the central groove 22 is very small, a more stable valve opening pressure can be obtained with less variation.
- the groove width W1 (opening width, see FIG. 3) of the central groove 22 is extremely small, for example, about several tens of ⁇ m. For this reason, it is very difficult to measure the depth of the groove at this location using, for example, a laser beam.
- the groove width W ⁇ b> 2 of the measurement groove 24 is particularly large unlike the other portions of the cleavage groove 21.
- the groove width W2 of the measurement groove 24 of the present embodiment is an opening width of, for example, 300 to 1000 ⁇ m.
- the groove bottom is planar, and the width of the groove bottom is formed to be considerably larger than the width of the central groove 22.
- the groove depth can be accurately measured by irradiating the bottom of the measurement groove 24 with laser light and receiving the reflected light from above in the figure.
- the length of the measurement groove 24 in the groove longitudinal direction is approximately the same as the groove width W2 (specifically, within twice). If the wide portion of the central groove 22 is at this level, the valve opening pressure is stable.
- the groove width of the four oblique side grooves 23 is approximately the same as that of the central groove 22.
- This manufacturing method includes the following four steps. That is, (1) a crushing step for forming a location for making the safety valve 18 in the sealing plate 12, (2) a groove pressing step for forming the cleavage groove 21 in the location, (3) the depth of the cleavage groove 21 A measurement process to be acquired, and (4) a determination process for determining the quality of the formed cleavage groove 21.
- the groove pressing step (2) corresponds to the first step
- the measuring step (3) corresponds to the second step
- the determination step (4) corresponds to the third step.
- a part for forming the safety valve 18 is formed by crushing a part of the sealing plate 12 with a press.
- a flat mold having the size of the safety valve 18 is applied to the front and back surfaces of the sealing plate 12 and pressed from above and below.
- the range of the safety valve 18 shown in FIG. 2 can be made thin compared with the periphery. Since it is formed in this way, the thickness of the safety valve 18 other than the cleavage groove 21 is substantially uniform.
- the plate thickness is formed to a predetermined thickness.
- the entire cleavage groove 21 is formed by one press. That is, as shown in FIG. 5, the punch 31 having the shape of the cleavage groove 21 and the convex portions formed at a uniform height is pressed into the range of the portion subjected to the crushing process in (1). In the punch 31, a central convex portion 32 that forms the central groove 22, an oblique convex portion 33 that forms the oblique groove 23, and a measuring convex portion 34 that forms the measurement groove 24 are formed at the same height. . Therefore, all of the central groove 22, the hypotenuse groove 23, and the measurement groove 24 are formed simultaneously by this groove pressing step (2).
- the groove thickness T is the same at least in the design everywhere in the cleavage groove 21. That is, if the safety valve 18 and the punch 31 are parallel to each other during pressing, the entire cleavage groove 21 has a uniform depth. However, if the pressing is performed while tilting each other, the groove thickness T is slightly different depending on the location.
- the groove thickness T of the cleavage groove 21 formed in the groove pressing step (2) is measured. Therefore, as shown in FIG. 6, the laser beam L is irradiated to two measurement grooves 24, and the depth to the groove bottom is measured.
- the measurement groove 24 has a groove width W2 that is large enough to perform measurement with a laser beam. Therefore, the laser beam L is not scattered by the side wall of the groove. Therefore, high-precision measurement is possible with the laser beam L. Since the plate thickness of the safety valve 18 at a place other than the cleavage groove 21 is known from the crushing step (1), the groove thickness T in the measurement groove 24 can be obtained.
- the determination step (4) it is determined from the result of the measurement step (3) whether or not the formed cleavage groove 21 is a non-defective product.
- an appropriate range of the groove thickness T is determined and stored in advance. Then, it is determined whether or not the groove thickness T obtained in the measurement step (3) is within this appropriate range. If it is determined that the groove thickness T is not within an appropriate range in any of the two measurement grooves 24, the cleavage groove 21 is determined as a defective product. When it is determined that the cleavage groove 21 is defective, the sealing plate 12 including the safety valve 18 is excluded and is not used for manufacturing the secondary battery 10.
- the groove thicknesses T in the two measurement grooves 24 are within an appropriate range, the difference between the groove thicknesses T in the two measurement grooves 24 is further calculated. Thereby, the presence or absence of the inclination of the bottom face of the cleavage groove 21 by the inclination of the punch 31 and the sealing plate 12 at the time of pressing can be grasped. When these are not parallel at the time of pressing, the groove thickness T of the two measurement grooves 24 is good within the other range (near the left and right end portions in FIG. 6). This is because it may be out of the range.
- the allowable range of the difference between the groove thicknesses T of the two measurement grooves 24 is also determined and stored in advance. If the obtained difference value is within this range, it is determined that the product is non-defective. If it is out of this range, it is determined as a defective product. And when it determines with it being inferior goods, the sealing board 12 containing the safety valve 18 is excluded, and it is not used for manufacture of the secondary battery 10.
- FIG. 1 the allowable range of the difference between the groove thicknesses T of the two measurement grooves 24 is also determined and stored in advance. If the obtained difference value is within this range, it is determined that the product is non-defective. If it is out of this range, it is determined as a defective product. And when it determines with it being inferior goods, the sealing board 12 containing the safety valve 18 is excluded, and it is not used for manufacture of the secondary battery 10.
- the sealing plate 12 determined as a non-defective product by this determination is further sent to the next process and used for manufacturing the secondary battery 10. That is, the power generation element 16 is housed in the main body 13 of the battery case 11 and sealed with a good sealing plate 12. Thereby, the secondary battery 10 provided with the favorable safety valve 18 can be manufactured. By doing in this way, even if it is a measurement of only two places, it can be determined whether the whole groove thickness T of the cleavage groove 21 is in a favorable range. Therefore, it is possible to manufacture the safety valve 18 and the secondary battery 10 with small variations in valve opening pressure and stable quality.
- the cleavage groove 21 is Judged to be non-defective. However, if any of the groove thicknesses T of the measurement grooves 24 is not within a predetermined range or the difference between them is large, the product is determined to be defective. In addition, it can replace with the measurement by the laser beam L, and the same determination can be performed even if it performs the contact-type measurement by a contactor. Depending on the measurement method, the groove width W2 and length of the measurement groove 24 may be appropriately set.
- the safety valve 18 is integrally formed from the sealing plate 12, but the safety valve 41 may be formed by a separate member 42 as shown in FIG.
- the separate member 42 on which the safety valve 41 is formed may be attached to the sealing plate 12 by welding, for example.
- the safety valve 41 and the cleavage groove 21 are first formed in the separate member 42 and fixed to the sealing plate 12.
- the cleavage groove 21 may be formed in the order in which the safety valve 41 is attached to the sealing plate 12.
- the measurement groove 24 is provided in the cleavage groove 21, so that the groove thickness T at the position of the measurement groove 24 can be measured with high accuracy. Furthermore, since the measurement grooves 24 are provided at two locations separated from each other, the inclination of the mold at the time of groove formation can be estimated from the difference between the measurement results at the two locations. Therefore, it can be determined whether or not the groove thickness T is within the allowable range at all locations of the cleavage groove 21 including both ends of the central groove 22 and the oblique groove 23. Furthermore, since the groove width is very small at locations other than the measurement groove 24, the variation in the valve opening pressure is kept small. Therefore, it is possible to obtain a safety valve that has a small variation in valve opening pressure, is stable in quality, and can assure quality reliably.
- a battery pack 100 using a plurality of secondary batteries 10 is manufactured and used.
- a plurality of secondary batteries 10 are arranged such that the side surfaces (large area surfaces) of the adjacent secondary batteries 10 are in contact with each other so that the external electrode terminals are arranged on the same side.
- the restraint plates 110 are brought into contact with both sides thereof, and the restraint plates 110 are fastened with the restraint screws 111 and the nuts 112.
- each secondary battery 10 can be restrained and used with a restraint pressure suitable for use.
- the positive electrode terminal 14 and the negative electrode terminal 15 of each secondary battery 10 are connected in series in order to form a battery pack 100 that is mounted on various devices.
- the battery pack 100 can be used by being mounted on a vehicle 200 as shown in FIG. 9, for example.
- the vehicle 200 is a hybrid vehicle that is driven by using an engine 240, a front motor 220, and a rear motor 230 in combination.
- This vehicle 200 includes a vehicle body 290, an engine 240, a front motor 220, a rear motor 230 attached thereto, a cable 250, an inverter 260, and a battery pack 100 having a plurality of secondary batteries 10 therein.
- the vehicle may be a vehicle that uses battery-generated electric energy for all or a part of its power source.
- an electric vehicle, a hybrid vehicle, a plug-in hybrid vehicle, a hybrid railway vehicle, a forklift, an electric vehicle Wheelchairs, electric assist bicycles, electric scooters, etc. are listed.
- the battery pack 100 can be used for a battery-equipped device as shown in FIG. Shown in this figure is a hammer drill 300 on which a battery pack 100 including the secondary battery 10 of this embodiment is mounted.
- the hammer drill 300 is a battery-equipped device having a battery pack 100 and a main body 320.
- the battery pack 100 is detachably accommodated in the bottom 321 of the main body 320 of the hammer drill 300.
- the battery-equipped device may be any device equipped with a battery and using it as at least one energy source.
- a personal computer a mobile phone, a battery-powered electric tool, an uninterruptible power supply, etc.
- Various types of home appliances, office equipment, and industrial equipment driven by In addition to the battery pack 100, devices that can be used with a single battery that is not in an assembled battery state are also included.
- planar shape of the safety valve is not limited to the illustrated rectangular shape, and may be any shape such as a circle, an oval, or a square. In any case, a cleavage groove is provided in that range.
- planar shape of the measurement groove 24 is not limited to the substantially circular shape shown in the figure, and may be any shape. The same effect can be obtained even if the measurement grooves 24 are provided in the four oblique grooves 23, respectively.
- the depth of the cleavage groove 21 including the measurement groove 24 is made uniform. However, only a part of the measurement groove may be provided with a slight step. For example, it may be formed slightly shallower than other parts of the cleavage groove within a range that does not affect the valve opening pressure. However, even in this case, the measurement groove and the other part of the cleavage groove are formed with the same punch, and the difference in depth between them must be known.
- the safety valve 18 is formed on the sealing plate 12, but it may be provided on the main body 13 of the battery case 11. Further, the shape of the battery case 11 is not limited to the illustrated one.
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Abstract
Description
このようなものであれば,開裂溝の長さ方向について,複数箇所での測定が可能である。開裂溝が深さ方向に傾いて形成された場合でも,その全体の深さを推測できる。従って,より確実に品質保証することができる。
このようなものであれば,金型の傾きによって,溝深さが部分的に許容範囲外となった開裂溝が形成されてしまったものを,容易に排除できる。
例えば,安全弁の平面形状は,図示の長方形のものに限らず,円形,長丸,正方形等どのようなものでもよい。いずれの場合でも,その範囲内に開裂溝が設けられる。また,測定溝24の平面形状も,図示の略円形状に限らず,どのようなものであってもよい。また,測定溝24を4つの斜辺溝23にそれぞれ設けたものとしても,同様の効果が得られる。
12 封口板
18 安全弁
21 開裂溝
24 測定溝
31 パンチ
32 中央凸部
34 測定凸部
Claims (10)
- 内部に発電要素を収納して密閉された密閉型電池の電池ケースに設けられ,開裂溝が形成されている安全弁において,
前記開裂溝には部分的に,他の部分より幅広の測定溝が形成されていることを特徴とする安全弁。 - 請求項1に記載の安全弁において,
前記測定溝が,前記開裂溝の複数箇所に設けられていることを特徴とする安全弁。 - 内部に発電要素を収納して密閉された密閉型電池の電池ケースに設けられる安全弁の製造方法において,
開裂溝を形成する凸部と,前記凸部に部分的に,他の部分より幅広の箇所とが形成されている金型を用いて,プレスすることによって,開裂溝およびその一部分であって他の部分より幅広の測定溝を形成する第1工程と,
前記測定溝の深さを測定する第2工程と,
前記第2工程で取得した前記測定溝の深さが予め決めた範囲内の値である場合に良品であると判定し,それ以外である場合に不良品であると判定し排除する第3工程とを含むことを特徴とする安全弁の製造方法。 - 請求項3に記載の安全弁の製造方法において,
前記第1工程では,前記金型として,前記幅広の箇所が前記凸部の複数箇所に形成されているものを用い,
前記第2工程では,前記複数箇所の測定溝の深さをそれぞれ測定し,
前記第3工程では,前記複数箇所の測定溝の深さがいずれも前記予め決めた範囲内の値であり,かつ,それらの深さの差の値が予め決めた上限値以内の値である場合に良品であると判定し,それ以外である場合に不良品であると判定し排除することを特徴とする安全弁の製造方法。 - 電池ケースの内部に発電要素を収納して密閉された密閉型電池において,
前記電池ケースは,開裂溝が形成された安全弁を有しており,
前記開裂溝には部分的に,他の部分より幅広の測定溝が形成されていることを特徴とする密閉型電池。 - 請求項5に記載の密閉型電池において,
前記測定溝が,前記開裂溝の複数箇所に設けられていることを特徴とする密閉型電池。 - 安全弁が設けられた電池ケースの内部に発電要素を収納して密閉する密閉型電池の製造方法において,
開裂溝を形成する凸部と,前記凸部に部分的に,他の部分より幅広の箇所とが形成されている金型を用いて,プレスすることによって,開裂溝およびその一部分であって他の部分より幅広の測定溝を形成することにより前記安全弁を形成する第1工程と,
前記測定溝の深さを測定する第2工程と,
前記第2工程で取得した前記測定溝の深さが予め決めた範囲内の値である場合に良品であると判定し,それ以外である場合に不良品であると判定し排除する第3工程とを含むことを特徴とする密閉型電池の製造方法。 - 請求項7に記載の密閉型電池の製造方法において,
前記第1工程では,前記金型として,前記幅広の箇所が前記凸部の複数箇所に形成されているものを用い,
前記第2工程では,前記複数箇所の測定溝の深さをそれぞれ測定し,
前記第3工程では,前記複数箇所の測定溝の深さがいずれも前記予め決めた範囲内の値であり,かつ,それらの深さの差の値が予め決めた上限値以内の値である場合に良品であると判定し,それ以外である場合に不良品であると判定し排除することを特徴とする密閉型電池の製造方法。 - 請求項5または請求項6記載の密閉型電池を搭載することを特徴とする車両。
- 請求項5または請求項6記載の密閉型電池を搭載することを特徴とする電池搭載機器。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12/740,415 US8431262B2 (en) | 2009-01-27 | 2009-05-26 | Safety valve and manufacturing method thereof, sealed battery and manufacturing method thereof, vehicle, and battery mounting device |
KR1020107009490A KR101052998B1 (ko) | 2009-01-27 | 2009-05-26 | 안전 밸브와 그 제조 방법, 밀폐형 전지와 그 제조 방법, 차량, 전지 탑재 기기 |
CN2009801007217A CN101868870B (zh) | 2009-01-27 | 2009-05-26 | 安全阀和其制造方法、密封型电池和其制造方法、车辆、电池搭载设备 |
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JP2009015174A JP5075138B2 (ja) | 2009-01-27 | 2009-01-27 | 安全弁とその製造方法,密閉型電池とその製造方法,車両,電池搭載機器 |
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US (1) | US8431262B2 (ja) |
JP (1) | JP5075138B2 (ja) |
KR (1) | KR101052998B1 (ja) |
CN (1) | CN101868870B (ja) |
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Cited By (1)
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CN102376925A (zh) * | 2010-08-13 | 2012-03-14 | Sb锂摩托有限公司 | 二次电池 |
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JP5819051B2 (ja) * | 2010-09-08 | 2015-11-18 | 日立オートモティブシステムズ株式会社 | 二次電池 |
CN103109413B (zh) * | 2011-02-28 | 2015-07-01 | 株式会社杰士汤浅国际 | 铅蓄电池及其制造方法 |
JP5382205B2 (ja) | 2011-04-01 | 2014-01-08 | トヨタ自動車株式会社 | 蓄電装置 |
DE102012216479A1 (de) * | 2012-09-14 | 2014-03-20 | Robert Bosch Gmbh | Batteriezelle mit in Gehäusedeckplatte integrierter Berstscheibe |
CN107394063B (zh) * | 2016-05-16 | 2023-06-06 | 宁德时代新能源科技股份有限公司 | 二次电池 |
JP6865954B2 (ja) * | 2016-12-22 | 2021-04-28 | 株式会社大北製作所 | 電池ケース用厚み測定装置 |
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- 2009-05-26 US US12/740,415 patent/US8431262B2/en active Active
- 2009-05-26 CN CN2009801007217A patent/CN101868870B/zh active Active
- 2009-05-26 WO PCT/JP2009/059562 patent/WO2010087040A1/ja active Application Filing
- 2009-05-26 KR KR1020107009490A patent/KR101052998B1/ko active IP Right Grant
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EP2418711A3 (en) * | 2010-08-13 | 2013-07-17 | Samsung SDI Co., Ltd. | Secondary battery |
US9118061B2 (en) | 2010-08-13 | 2015-08-25 | Samsung Sdi Co., Ltd. | Secondary battery |
Also Published As
Publication number | Publication date |
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JP5075138B2 (ja) | 2012-11-14 |
US20110269000A1 (en) | 2011-11-03 |
CN101868870B (zh) | 2013-03-27 |
US8431262B2 (en) | 2013-04-30 |
JP2010176867A (ja) | 2010-08-12 |
KR101052998B1 (ko) | 2011-07-29 |
KR20100100768A (ko) | 2010-09-15 |
CN101868870A (zh) | 2010-10-20 |
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