JP4507487B2 - Sealed alkaline storage battery - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealed alkaline storage battery configured such that a highly versatile voltage can be obtained from an output voltage of an alkaline storage battery such as a nickel-hydrogen storage battery having a low electromotive force in a single battery.
[0002]
[Prior art]
The sealed alkaline storage battery targeted by the present application is a relatively small secondary battery used as a power source for portable electronic devices such as mobile phones and portable personal computers, wireless devices such as cordless phones, and the like. Mainly used for storage batteries and nickel-cadmium storage batteries.
[0003]
For example, a nickel-hydrogen storage battery is effective as a battery power source for portable devices and electric devices because it has a good balance of three elements of high capacity, high energy density, and cost performance. However, since the electromotive force (nominal voltage = 1.2 V) is low, there are many cases where a single cell cannot satisfy the operating voltage required by a device that uses a battery as a power source. In many cases, a plurality of single cells are connected in series to obtain a required output voltage. A configuration for connecting a plurality of single cells in series to obtain an output voltage required by the device is configured in an assembled battery, a battery pack, or the like.
[0004]
The assembled battery is a battery in which a plurality of single cells are connected in series or series-parallel, and the plurality of single cells are integrated by a heat shrinkable tube or the like. For example, as shown in FIG. 8, the positive and negative electrodes of four cylindrical unit cells 30 are connected in series by a connection plate 32, a thermal protector 33 is inserted into the series circuit, and the positive terminals are connected to the unit cells 30 at both ends. 34, after attaching the negative electrode terminal 35, the structure which took out the positive electrode terminal 34 and the negative electrode terminal 35 outside, and united the whole with the heat contraction tube 31 is used widely.
[0005]
Moreover, as shown in FIG. 9, the assembled battery disclosed in Japanese Patent Application Laid-Open No. 13-126690 includes a plurality (three in this case) of rectangular unit cells 200 in a frame body 101, and each unit cell 200 is accommodated. A configuration connected in series is shown.
[0006]
Moreover, as a storage battery corresponding to a case where large electric power such as an electric vehicle or a hybrid vehicle is required, one proposed by the applicants of the present application and disclosed in Japanese Patent Laid-Open No. 2001-57199 is known. As shown in FIG. 10, a plurality of (six in this case) battery cases 53 that house power generation elements are integrally connected to form an integrated battery case 52, and a plurality of storage batteries are integrated into a collective battery. It is. In this assembled battery, a plurality of storage batteries are integrally connected by sharing the adjacent ones of the battery case 53 and the power generation elements are connected in series. Further, the assembled battery is connected in the short direction. The cooling air flow path and the heat radiation protrusion are formed between the connections. The upper open end of the integrated battery case 52 is closed by a lid 54, but the internal space is partitioned by a partition corresponding to each battery case 53, adjacent power generation elements are connected in series by connecting means, and are attached to both ends in the longitudinal direction. Connected to the input / output terminal 55.
[0007]
[Problems to be solved by the invention]
In order to be able to cope with the operating voltage required by the equipment such as nickel-hydrogen storage battery with low electromotive force, a plurality of single cells are connected in series as described above to form a battery pack or an assembled battery. become. The battery pack and the assembled battery require components other than the battery, and there are problems associated with an increase in cost and an increase in volume.
[0008]
Further, when connecting a plurality of unit cells in series, as shown in FIGS. 8 and 9, the connection is facilitated by alternately turning the adjacent unit cells upside down. In the state, a single cell with the sealing portion facing downward always occurs. On the sealing portion side, a space is formed between the electrode plate group and the sealing plate. If the state where the sealing portion side faces downward is continued, an undesirable state such as the electrolyte flowing into the space occurs.
[0009]
Moreover, in the case where a plurality of single cells are integrated by a bundling means such as a pack case or a heat-shrinkable tube, the mechanical strength is inevitably lowered, and it is necessary to provide a structure for compensating for the strength reduction in portable devices and electric tools .
[0010]
An object of the present invention is to configure an alkaline storage battery having a low electromotive force so as to obtain an output voltage that can easily correspond to the operation of the device without configuring the battery pack or the assembled battery.
[0011]
[Means for Solving the Problems]
  In order to achieve the above object, a sealed alkaline storage battery according to the first invention of the present application includes a plurality of power generation elements housed in a metal battery can, each of which is housed in an insulating liquid junction prevention body. Are electrically connected in series and / or in parallel to be connected to the positive terminal and the negative terminal exposed from the sealing plate that closes the battery can.In addition, a common space is provided for each power generation element, an exhaust valve for exhausting abnormal internal pressure in the space to the outside is provided on the sealing plate, and a connection member that electrically connects a plurality of power generation elements is connected to both ends thereof A liquid junction prevention means is formed by inserting into the resin molding plate so that the portion is exposed, and the electrolyte solution constituting the power generation element is formed in a gel electrolyte solutionIt is characterized by.
[0012]
  According to the sealed alkaline storage battery according to the first aspect of the present invention, when a plurality of power generation elements housed in the liquid junction prevention body are housed in the battery can and the plurality of power generation elements are connected in series, like a nickel-hydrogen storage battery. A single battery can be configured as a sealed alkaline storage battery capable of obtaining a highly versatile output voltage even with a low electromotive force. Further, if a plurality of power generation elements are connected in series and parallel, the discharge capacity can be increased simultaneously with the output voltage. Conventionally, these objects have been achieved by configuring a battery pack or a battery pack. However, the sealed alkaline storage battery of the present invention achieves the object with the battery itself. Therefore, it is possible to eliminate members and man-hours.In addition, by providing a common space for each power generation element, and providing an exhaust valve for releasing the abnormal internal pressure in the space to the outside on the sealing plate, gas is generated from the power generation element due to abnormal use, and the inside of the sealed battery can If the pressure rises abnormally, there is a risk of rupture, but the exhaust valve connected to the space common to each power generation element releases the abnormally raised internal pressure to the outside, so that the battery rupture due to abnormal use is prevented. Furthermore, it is ensured that a liquid junction is generated between the plurality of power generation elements by inserting the connection member that electrically connects the plurality of power generation elements into the resin molding plate so that the connection portions at both ends thereof are exposed. By forming the electrolytic solution constituting the power generation element with a gel electrolyte, it is possible to suppress the flow of the electrolytic solution and more reliably prevent the occurrence of a liquid junction between the plurality of power generation elements.
[0013]
  Further, in the sealed alkaline storage battery according to the second invention of the present application, a plurality of power generation elements respectively accommodated in an insulating liquid junction prevention body are accommodated in a metal battery can, and the opening of the battery can is a sealing plate. The plurality of power generation elements are electrically connected in series and / or in parallel and connected to the plurality of components disposed on the outer surface side of the sealing plate, and the conductor surfaces of the plurality of components are connected to the positive terminal and the negative electrode. As a terminal, each is exposed to the outside through an opening provided in an insulating plate that closes the outer surface of the sealing plate.In addition, a common space is provided for each power generation element, an exhaust valve for exhausting abnormal internal pressure in the space to the outside is provided on the sealing plate, and a connection member that electrically connects a plurality of power generation elements is connected to both ends thereof A liquid junction prevention means is formed by inserting into the resin molding plate so that the portion is exposed, and the electrolyte solution constituting the power generation element is formed in a gel electrolyte solutionIt is characterized by.
[0014]
  According to the sealed alkaline storage battery according to the second aspect of the present invention, a plurality of power generation elements are housed in a liquid junction prevention body in a battery can, and the output voltage and battery capacity are not affected by the configuration of the assembled battery or battery pack. Can be increased. Further, since the sealing plate that seals the battery can is closed by the insulating plate, a terminal member, a safety valve, a protective element, and the like can be disposed on the outer surface side of the sealing plate. A sealed alkaline storage battery having a high output and a safety function is formed by exposing the conductor surfaces of these constituent members to the positive electrode terminal and the negative electrode terminal from the opening of the insulating plate.In addition, by providing a common space for each power generation element, and providing an exhaust valve for releasing the abnormal internal pressure in the space to the outside on the sealing plate, gas is generated from the power generation element due to abnormal use, and the inside of the sealed battery can If the pressure rises abnormally, there is a risk of rupture, but the exhaust valve connected to the space common to each power generation element releases the abnormally raised internal pressure to the outside, so that the battery rupture due to abnormal use is prevented. Furthermore, it is ensured that a liquid junction is generated between the plurality of power generation elements by inserting the connection member that electrically connects the plurality of power generation elements into the resin molding plate so that the connection portions at both ends thereof are exposed. By forming the electrolytic solution constituting the power generation element with a gel electrolyte, it is possible to suppress the flow of the electrolytic solution and more reliably prevent the occurrence of a liquid junction between the plurality of power generation elements.
[0017]
In addition, when an overcurrent / overheat protection element is provided in series with the positive electrode connection circuit or the negative electrode connection circuit, the device to which the storage battery is connected fails or the positive electrode terminal and the negative electrode terminal are short-circuited. The overcurrent / overheat protection element is tripped by the short-circuit current, and the resistance value is rapidly increased. Therefore, the short-circuit current is regulated, and the storage battery can be prevented from being damaged by the short-circuit.
[0018]
In addition, a member for forming a terminal by providing an electrode plate of an overcurrent / overheat protection element disposed on the outer surface side of the sealing plate or a metal member constituting a discharge valve for a positive electrode terminal or a negative electrode terminal Therefore, it is possible to reduce the size and cost.
[0019]
In addition, the electrode plate group constituting the power generation element has a laminated structure in which a plurality of positive plates and negative plates are stacked via a separator, or a winding structure in which positive plates and negative plates are wound via a separator. Can be configured.
[0021]
Further, the liquid junction prevention body can be formed by partitioning the inside of the bottomed cylindrical body into a plurality of storage chambers that accommodate the respective power generation elements by a partition body, and the plurality of liquid junction prevention bodies are integrated into a constituent member. The number can be reduced.
[0022]
In addition, it is effective to apply gold plating to the positive electrode terminal and / or the negative electrode terminal, which not only reduces contact resistance and improves wear strength when connecting the battery to equipment, but also improves corrosion resistance. be able to. When the gold plating is performed, the above-described effect can be obtained only by applying only to the externally exposed portion of the positive electrode terminal and / or the negative electrode terminal.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention. The following embodiment is an example embodying the present invention, and does not limit the technical scope of the present invention.First, a reference example of the present invention will be described.
[0024]
  BookReference exampleThe sealed alkaline storage battery according to FIG. 1 shows an example in which the output voltage from the positive electrode terminal to the negative electrode terminal is a nickel-hydrogen storage battery with a voltage of 3.6 V. FIG. Show.
[0025]
In FIG. 1, insulative liquid junction prevention bags (solutions) containing electrode plate groups 41a, 41b, and 41c in battery cans 45 formed in three independent power generation element storage chambers by partitions 46a and 46a, respectively. An anti-tangle body) 46 is disposed, and the electrode plate groups 41a, 41b, 41c are connected in series by connecting the positive electrode lead and the negative electrode lead drawn from the respective positive electrode plate and negative electrode plate, as shown in the figure. . The opening of the battery can 45 is sealed by a sealing plate 42 provided with liquid injection ports 48, 48, 49 corresponding to the electrode plate groups 41a, 41b, 41c. After the sealing, the electrolyte is injected from the liquid injection ports 48, 48, 49 into the three power generation element accommodation chambers divided by the partition 46a. After the injection, the injection ports 48 and 48 are closed by inserting the plugs 43 and 43, respectively, and the injection port 49 is closed by the plug 44 through the gasket 47. The positive electrode side in which the electrode plate groups 41a, 41b, 41c are connected in series is connected to a sealing plug 44 as shown in the figure, and the negative electrode side is connected to a sealing plate 42. Therefore, the plug 44 can be used for external connection with the positive electrode terminal and the sealing plate 42 or the battery can 45 as the negative electrode terminal.
[0026]
  thisReference exampleWith this configuration, three power generation elements having an electromotive force of 1.2V are accommodated in the battery can 45, and a sealed alkaline storage battery having an output voltage of 3.6V, which is connected in series, constitutes an assembled battery or a battery pack. Formed without. As described above, when a plurality of power generation elements are connected inside the battery, a liquid junction may flow due to a potential difference and the electrolyte flows through the connection leads to the adjacent power generation elements. In order to prevent this, as shown in the figure, it is effective to provide a liquid junction prevention means 50 for applying an insulating coating to the connection leads straddling adjacent power generation elements.
[0027]
  Next, the aboveAccording to reference examplesThe development of the structure and more practicality1The configuration of the embodiment will be described.
[0028]
  First1As shown in FIG. 2, the sealed alkaline storage battery according to the embodiment is configured as a flat rectangular prismatic battery, and a positive electrode terminal (+) and a negative electrode terminal (−) are provided on the top surface thereof. The shape and the output voltage are almost the same as those of the rectangular lithium ion secondary battery, and a nickel-hydrogen storage battery can be used instead of the lithium ion secondary battery.
[0029]
FIG. 3 shows the internal configuration of the sealed alkaline storage battery in a cross section taken along the line XX of FIG. 2. In the battery can 5 formed by pressing a nickel-plated steel plate into a bottomed rectangular tube, The first, second, and third power generation elements A, B, and C housed in the liquid junction prevention bag 6 made of polypropylene are housed. As is well known, the power generation elements A, B, and C are composed of a positive electrode plate, a negative electrode plate, an electrode plate group consisting of separators, and an electrolyte solution. Here, a plurality of positive electrode plates and negative electrode plates are connected via separators. Each of the first, second, and third electrode plate groups 1a, 1b, and 1c having a laminated structure and an alkaline electrolyte are accommodated in the liquid junction prevention bag 6 and have independent nickel-hydrogen storage battery functions. ing. The liquid junction prevention bag 6 may be made of a fluorine resin, a polyphenylene sulfide, or the like in addition to a polyolefin resin such as polypropylene. Further, without using a separate bag for each power generation element A, B, C, a configuration in which a plurality of power generation element accommodation chambers are formed by partitions as in the configuration of the first embodiment shown in FIG. It can also be applied. In any case, it can be easily manufactured by resin molding.
[0030]
FIG. 4 shows the structure of the power generation element A (the power generation elements B and C have the same structure), in which a plurality of positive plates 20 and a plurality of negative plates 21 accommodated in an envelope separator 22 are alternately stacked. The electrode plate group 1a is configured and stored in the liquid junction prevention bag 6. Each positive electrode plate 20 is provided with a lead lead, which are bundled and welded together with one end of the positive electrode lead 10a. Similarly, with respect to each negative electrode plate 21, the lead leads provided on each negative electrode plate 21 are bundled and welded together with one end to the negative electrode lead 11a.
[0031]
An alkaline electrolyte is injected into the liquid junction prevention bag 6 together with the electrode plate group 1 a constituted by the positive electrode plate 20, the negative electrode plate 21, and the separator 22. Since the upper part of the liquid junction prevention bag 6 is opened, it is more preferable to use a gelled alkaline electrolyte. The gelation of the alkaline electrolyte is performed by mixing a gelled compound containing a gelling agent as a main component, or applying the gelled material to the separator, or impregnating the separator with a compound mainly containing a gelling agent, After the electrode plate group 1a is accommodated in the liquid junction prevention bag 6, a method of injecting a single electrolyte into the liquid junction prevention bag 6 to gel the alkaline electrolyte can be employed. At this time, the weight of the organic compound for increasing the viscosity of the electrolytic solution is preferably 1 to 15% of the electrolytic solution. If the weight of the organic compound is less than this range, the amount of increase in the viscosity of the alkaline liquid is reduced, and it becomes difficult to suppress the movement of the alkaline liquid. If the weight of the organic compound exceeds 15% of the weight of the electrolyte, the occupied volume of the amount of the organic compound in the battery cannot be ignored, the battery's volumetric energy density is lowered, and the gas permeation of the electrode plate is reduced. This is not preferable because the battery internal pressure is extremely increased during charging.
[0032]
As a gelling agent for gelling the alkaline electrolyte, a polymer having a hydrophilic group in the side chain can be used without any particular limitation. For example, polyacrylic acid, polymethacrylic acid, acrylic acid / methacrylic acid copolymer, isobutylene / maleic acid copolymer, poly (2-acrylamido-2-methylpropanesulfonic acid), polyacryloxypropanesulfonic acid, polyvinylsulfone Examples include alkali metal salts such as acids. However, it is not always necessary that all acidic groups are alkali metal salts. These may be used alone or in combination of two or more. Of these, potassium polyacrylate, sodium polyacrylate, polypotassium methacrylate, and polysodium methacrylate are particularly preferable. The gelling agent is preferably a crosslinked polymer. For crosslinking, for example, when a polymer such as polyacrylic acid, polymethacrylic acid, or acrylic acid / methacrylic acid copolymer is prepared, a crosslinking agent such as divinylbenzene may be added.
[0033]
Each liquid junction prevention bag 6 containing the first to third electrode plate groups 1a, 1b, and 1c configured as described above is housed in the battery can 5, and the first to third electrode plate groups. The positive leads 10a, 10b, and 10c and the negative leads 11a, 11b, and 11c drawn from the respective 1a, 1b, and 1c are connected to predetermined positions.
[0034]
The sealing plate 2 for sealing the battery can 5 has a resin molded plate 3 bonded to the inside of the can. Through holes are formed in the sealing plate 2 and the resin molding plate 3 corresponding to the first to third electrode plate groups 1a, 1b, and 1c, respectively, and an electrolytic solution is injected into each liquid junction prevention bag 6. Served to do. A hollow rivet 4 is attached to a through hole above the first electrode plate group 1a with a gasket 17 so as to be insulated from the sealing plate 2 with a washer 8 fixed thereto.
[0035]
Connection plates 12a and 12b are inserted into the resin can 3 at two locations with exposed surfaces in the battery can 5, and the first to third electrode plate groups 1a, 1b and 1c are connected in series. Served to do. The positive electrode lead 10a drawn from the first electrode plate group 1a is bonded to the washer 8, and the negative electrode lead 11a is bonded to one exposed surface of the connection plate 12a. Further, the positive electrode lead 10b drawn out from the second electrode plate group 1b is joined to the other exposed surface of the connection plate 12a, and the negative electrode lead 11b is joined to one exposed surface of the connection plate 12b. Further, the positive electrode lead 10 c drawn from the third electrode plate group 1 c is bonded to the other exposed surface of the connection plate 12 b, and the negative electrode lead 11 c is bonded to the sealing plate 2 through the opening 18 formed in the resin molding plate 3. Is done. With this connection configuration, the first to third electrode plate groups 1a, 1b, and 1c are connected in series while the washer 8 is on the positive electrode side and the sealing plate 2 is on the negative electrode side. Since this series connection is made via the connection plates 12a and 12b inserted in the resin molding plate 3, the portions embedded in the resin molding plate 3 of the connection plates 12a and 12b serve to prevent liquid junctions and are adjacent to each other. Due to the potential difference between the matching power generation elements, it is possible to reliably prevent a liquid junction from passing through the electrolyte through the positive leads 10b and 10c and the negative leads 11a and 11b.
[0036]
After the connection with the first to third electrode plate groups 1a, 1b, and 1c, the sealing plate 2 is laser-welded to the open end of the battery can 5, and the inside of the battery can 5 is sealed. Thereafter, an alkaline electrolyte is injected from the hollow portion of the rivet 4 attached to the sealing plate 2 into the liquid junction prevention bag 6 containing the first electrode plate group 1a, and the second electrode plate group 1b and the third electrode plate 3b. From the through hole provided above the electrode plate group 1c, an electrolyte is injected into the liquid junction prevention bag 6 that accommodates the first electrode plate group 1b and the second electrode plate group 1c, respectively. After that, as shown in FIG.
[0037]
The hollow portion of the rivet 4 is closed when a rubber valve body 14 is disposed thereon and the positive electrode cap 7 is joined onto the rivet 4 by enclosing the rubber valve body 14. The upper surface of the positive electrode cap 7 is externally exposed from the positive electrode opening 16a that opens to the resin cover 9 that covers the components disposed on the sealing plate 2, and is used for the positive electrode terminal (+) of the battery. . Further, the rubber valve element 14 functions as a safety valve that discharges the abnormal internal pressure to the outside when the pressure in the battery can 5 rises abnormally due to abnormal use of the battery or the like. A plurality of exhaust holes 7a are formed on the side surface of the positive electrode cap 7, and the exhaust holes 7a are closed by the rubber valve element 14 in a normal state. However, when the pressure in the battery can 5 rises abnormally, the pressure is increased. When the rubber valve body 14 is compressed by this, the exhaust hole 7a closed by the rubber valve body 14 is opened, and the internal pressure is released to the outside from the exhaust hole 7a. By providing this safety valve structure, it is possible to prevent a situation in which gas is generated due to abnormal use or the like, the internal pressure increases, and the battery ruptures.
[0038]
The PTC element (overcurrent / overheat protection element) 15 is attached to the upper surface side of the sealing plate 2 by joining the extended portion of the lower electrode 15 b to the sealing plate 2, and the upper electrode 15 a is configured on the sealing plate 2. It is exposed to the outside from the negative electrode opening 16b opened in the resin cover 9 covering the object, and is used for the negative electrode terminal (-) of the battery.
[0039]
The PTC element 15 is a thermistor having a positive temperature coefficient, and the resistance value rapidly increases when the element temperature exceeds a predetermined temperature. When a short circuit occurs between the positive electrode terminal (+) and the negative electrode terminal (−) for some reason, a short circuit current flows through the PTC element 15 connected in series with the charge / discharge circuit. When the internal temperature rises and the temperature rises above a predetermined temperature, the resistance value increases rapidly, causing a trip to a high resistance state and limiting the short circuit current. Therefore, the storage battery is prevented from being damaged by the short circuit. Moreover, since the resistance value of the PTC element 15 increases as the temperature rises due to the influence of the ambient temperature as well as the heat generation due to the overcurrent, it can be prevented that the storage battery is used in a state where the temperature has risen. For example, when the storage battery or a device equipped with the storage battery is left in a car parked under a hot summer sun, the battery temperature may exceed 80 ° C. In such a case, since the PTC element 15 is in a trip state and the resistance value is increased, the storage battery cannot be used, and is prevented from being used in an abnormal temperature state. Since the resistance value of the PTC element 15 returns to a low state when the temperature decreases, the PTC element 15 returns to a normal usable state.
[0040]
By joining the resin cover 9 to the battery can 5 and the sealing plate 2, as shown in FIG. 2, a nickel-hydrogen storage battery having a positive electrode terminal (+) and a negative electrode terminal (-) exposed to the top is formed. Is done. This storage battery is covered with a heat shrink sheet or the like, and can be marked with product display, standard display, cautionary notes, and the like.
[0041]
In the above configuration, it is effective to apply gold plating to at least a portion exposed to the outside of the positive electrode terminal (+) and / or the negative electrode terminal (−). Since the contact terminal (probe etc.) provided in the apparatus which connects the said battery is contact-connected to a positive electrode terminal (+) and a negative electrode terminal (-), it is requested | required that contact resistance should be made low. Since gold is difficult to form an oxide film and its own specific resistance is small, contact resistance can be reduced by applying gold plating to an externally exposed portion, that is, a contact connection portion. Further, since gold is excellent in corrosion resistance, it is possible to eliminate an increase in contact resistance and contact failure due to corrosion of the contact surface.
[0042]
In the above embodiment, since the upper surface of the positive electrode cap 7 is formed on the positive electrode terminal (+) and the upper electrode 15a of the PTC element 15 is formed on the negative electrode terminal (−), the gold plating is performed on the positive electrode cap 7 and the PTC element 15. It is preferable to partially apply to the externally exposed portion of the upper electrode 15a. Alternatively, the entire surface may be plated with gold in a state where the positive electrode cap 7 and the upper electrode 15a of the PTC element 15 are present as parts.
[0043]
In the above configuration, as shown in FIG. 5 as a circuit diagram, three power generating elements A, B, and C are connected in series between the positive terminal (+) and the negative terminal (−) to cope with an external short circuit or the like. Therefore, a nickel-hydrogen storage battery having an output voltage of 3.6 V is configured by connecting PTC elements 15 in series.
[0044]
The configuration described above shows an example in which a nickel-hydrogen storage battery having an output voltage of 3.6 V is shown. However, the number of power generation elements to be combined is arbitrarily selected, and the required output voltage is obtained in series and / or parallel. And a sealed alkaline storage battery having a discharge capacity.
[0045]
  FIG. 6 shows a configuration in which ten power generation elements A to J are accommodated in a battery can 25 and configured as a nickel-hydrogen storage battery having an output voltage of 12V.2This embodiment is configured in the same manner as the 3.6 V nickel-hydrogen storage battery described above except that the battery can 25 and the like are formed corresponding to the increase in the number of power generation elements A to J. be able to. FIG. 7 shows a circuit diagram of the 12V nickel-hydrogen storage battery. Ten power generation elements A to J are connected in series to obtain an output voltage of 12V, and a PTC element 15 is connected in series to short-circuit the circuit. Protected from.
[0046]
Moreover, although the example which used the thing of a laminated structure was shown as the electrode group 1a-1c which comprises electric power generation element AJ in the structure demonstrated above, a strip | belt-shaped positive electrode plate and a negative electrode plate are flattened through the separator. It is also possible to apply an electrode plate group having a wound structure wound around.
[0047]
【The invention's effect】
As described above, according to the sealed alkaline storage battery according to the present invention, when a plurality of power generation elements are housed in a battery can and connected in series, a single battery such as a nickel-hydrogen storage battery is used. Even a battery having a small electromotive force can be configured as a sealed alkaline storage battery capable of obtaining a highly versatile output voltage. Further, if a plurality of power generation elements are connected in series and parallel, the discharge capacity can be increased simultaneously with the output voltage. In addition, a safety function and a protection function can be incorporated in a small battery. Conventionally, these objects have been achieved by configuring a battery pack or a battery pack. However, the sealed alkaline storage battery of the present invention achieves the object with the battery itself. Therefore, it is possible to eliminate members and man-hours.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a sealed alkaline storage battery according to a first embodiment.
FIG. 2 is a perspective view showing an appearance of a 3.6V nickel-hydrogen storage battery according to a second embodiment.
FIG. 3 is a cross-sectional view showing the configuration of the storage battery.
FIG. 4 is a perspective view of a power generation element constituting the storage battery.
FIG. 5 is a circuit diagram showing the configuration of the storage battery.
FIG. 6 is a perspective view showing a configuration of a 12V nickel-hydrogen storage battery according to a third embodiment.
FIG. 7 is a circuit diagram showing the configuration of the storage battery.
FIG. 8 is a perspective view showing a configuration of a battery pack using a conventional cylindrical battery.
FIG. 9 is a perspective view showing a configuration of a battery pack using a conventional square battery.
FIG. 10 is a perspective view showing a configuration of a conventional stationary assembled battery.
[Explanation of symbols]
A to J Power generation element
1a, 1b, 1c, 41a, 41b, 41c
2,42 Sealing plate
3 Resin molding plate
5, 25, 45 Battery can
6,46 Liquid junction prevention bag (liquid junction prevention body)
12a, 12b connecting plate
14 Rubber valve (exhaust valve)
15 PTC element (overcurrent / overheat protection element)

Claims (10)

A plurality of power generation elements respectively housed in an insulating liquid junction prevention body are housed in a metal battery can, and the plurality of power generation elements are electrically connected in series and / or in parallel to close the battery can is connected to the positive and negative terminals for external exposure from Rutotomoni,
A common space is provided for each power generation element, and an exhaust valve for discharging the abnormal internal pressure in the space to the outside is provided on the sealing plate.
A connection member that electrically connects a plurality of power generation elements is inserted into the resin molding plate so that the connection portions at both ends thereof are exposed, and a liquid junction prevention means is formed,
Electrolyte constituting the power generating element is sealed alkaline storage battery characterized by comprising formed into a gel electrolyte. A plurality of power generation elements respectively accommodated in the insulating liquid junction prevention body are accommodated in a metal battery can, the opening of the battery can is sealed by a sealing plate, and the plurality of power generation elements are connected in series and / or in parallel. Connected to a plurality of components disposed on the outer surface side of the sealing plate and provided on an insulating plate that closes the outer surface side of the sealing plate with the conductor surfaces of the plurality of components as positive and negative terminals. was Rutotomoni is externally exposed respectively from the opening,
A common space is provided for each power generation element, and an exhaust valve for discharging the abnormal internal pressure in the space to the outside is provided on the sealing plate.
A connection member that electrically connects a plurality of power generation elements is inserted into the resin molding plate so that the connection portions at both ends thereof are exposed, and a liquid junction prevention means is formed,
Electrolyte constituting the power generating element is sealed alkaline storage battery characterized by comprising formed into a gel electrolyte. The positive electrode connection circuit or sealed alkaline storage battery according to claim 1 or 2 overcurrent and overheat protection elements arranged therein the negative electrode connection circuit in series. The sealed alkaline storage battery according to claim 2 or 3 , wherein an electrode plate of an overcurrent / overheat protection element disposed on an outer surface side of the sealing plate is formed on a positive electrode terminal or a negative electrode terminal. The sealed alkaline storage battery according to claim 2 or 3 , wherein the metal member constituting the discharge valve is formed on the positive electrode terminal or the negative electrode terminal. Power generating element, a plurality of sealed alkaline storage battery according to claim 1 to 5 any one of the positive electrode plate and the negative electrode plate comprising comprises a electrode plate group of a laminated structure formed by laminating with a separator. Power generating element sealed alkaline storage battery according to claim 1 to 5 any one consisting includes a electrode plate group of winding structure by winding via a separator and a positive electrode plate and the negative electrode plate. The sealed alkaline storage battery according to any one of claims 1 to 7 , wherein the liquid junction prevention body is partitioned by a partitioning body into a plurality of storage chambers in which the inside of the bottomed cylindrical body stores each power generation element. Positive terminal and / or gold-plated to the negative terminal is being subjected claim 2, 4, 5 sealed alkaline storage battery according to any one. The sealed alkaline storage battery according to claim 9 , wherein the gold plating is performed only on an externally exposed portion of the positive electrode terminal and / or the negative electrode terminal.

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