JP2009054301A - Control valve type lead-acid storage battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To control break of electrode poles for terminals and improve on vibration resistance, at the time of giving of vibration shock to a control valve type lead-acid storage battery with inter-cell connection formed by the Over Partition method. <P>SOLUTION: A cell-fixing protrusion is formed protruded from a strap at each strap forming an electrode pole for a terminal. A tip of the cell-fixing protrusion is fixed with a filler such as epoxy resin in a filler pot for cell fixing in a state housed in the filler pot for cell fixing provided inside a lid. With this, a cell is fixed to the lid at three points of the cell-fixing protrusion, the electrode pole for a terminal, and an inter-cell connection electrode pole, so that break of the electrode pole for the terminal is restrained at vibration shock, and a control valve type lead-acid storage battery excellent in vibration resistance can be obtained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a valve-regulated lead-acid battery.

  Lead-acid batteries are used for various purposes such as backup, engine starting and electric vehicles. Among them, a control valve type lead-acid battery that does not require rehydration and has a high degree of freedom in the installation direction is used for starting an engine of a motorcycle, an electric cart, and an electric motorcycle.

  FIG. 4 is a diagram showing an example of the structure of a conventional control valve type lead storage battery. FIG. 4 shows a state before the lid 501 is attached to the battery case 401 in order to facilitate understanding of the structure. Cells 407, 407 'comprising straps 406, 406' connecting positive electrode tabs 405, 405 'of the same polarity by laminating a separator and a negative electrode plate made of a positive electrode plate and glass fiber or constituent resin fiber mat. Is stored in the cell chamber 408. Note that the cell chamber 408 is formed by partitioning the inside of the battery case 401 with a partition wall 409.

  In so-called medium-capacity control valve type lead-acid batteries exceeding 20 Ah, a through partition system in which connection between cells is made through a through hole provided in a partition wall is the mainstream. Such a connection is made by resistance welding or plasma welding. This is because the space above the cell (dead space) in the cell chamber can be secured to such an extent that the connection between the cells via the partition walls is possible.

  On the other hand, in a small control valve type lead storage battery with a capacity of less than 20 Ah, the dead space above the cell is also smaller than that of a medium capacity battery. As shown in the figure, an over-partition inter-cell connection in which a connection body 410 for inter-cell connection is arranged beyond the partition 409 is performed.

  In the over-partition method, the connecting body 410 connects between the poles 411 and 411 ′ for connecting cells formed protruding from the straps 406 and 406 ′. FIG. 4 shows an example in which six cells 407 and 407 ′ arranged in a U-shape are connected in series, but the cell 407 ′ at the end located at both ends of the series connection is connected to the outside of the battery terminal. The terminal pole 412 used in the above is protruded from the straps 406 and 406 ′.

  FIG. 5 is a cross-sectional view showing a state where the lid 501 is attached to the opening of the battery case 401 shown in FIG. A sealing agent pot 502 that accommodates the connection body 410 and the pole columns 411 and 411 ′ is formed on the inner surface of the battery of the lid 501, and an acid-resistant sealing material such as an epoxy resin is provided in the sealing agent pot 502. By filling and solidifying the agent 503, the cell connection portion 504 constituted by the pole columns 411, 411 ′ and the connection body 410 is sealed with the sealant 503.

  Further, the upper part of the partition wall 409 is immersed in the sealant 503. The space between adjacent cell chambers 408 is sealed in a liquid-tight and air-tight manner.

  The terminal pole 412 is led out of the cell chamber 408 through a through hole 506 formed in the bottom of the recessed portion 505 of the terminal sealing provided on the outer surface of the lid 501. A terminal plate 507 is connected to the tip of the terminal pole 412. The depressed portion 505 is filled with the same sealant 503 as that filled in the sealant filling pot 502, and the terminal pole 412 is sealed.

When a control valve type lead-acid battery with overpartition type inter-cell connection as shown in FIGS. 4 and 5 is used in an application where vibration impact is applied during battery use, the control valve-type lead acid battery receives Acceleration is given to the cells 407 and 407 ′ inside the battery by the vibration shock. Stress corresponding to the acceleration and the mass of the cells 407 and 407 ′ is applied to the cells 407 and 407 ′. Such stress is applied to the inter-cell connecting pole column 411 or the pole column 411 ′ and the terminal pole column 412 in the end cell 407 ′, and in the other intermediate cell 407, 2 for inter-cell connection is applied. Added to the pole poles 411, 411 'of the book.

  A fixed state in the cell chamber 408 differs between the cell 407 ′ located at the end and the cell 407 located in the middle. In the cell 407 ′ located at the end, the sealing depth of the terminal pole column 412 must be shallower than the sealing depth of the inter-cell connection pole columns 411, 411 ′. In this case, in the cell 407 at the end, the terminal pole 412 having a shallower sealing depth than the poles 411 and 411 ′ for inter-cell connection starts to be deformed, and vibration shock is continuously applied. Then, there is a problem that the terminal pole 412 is broken near the connection portion between the terminal pole 412 and the strap 406 or strap 406 ′.

  However, the conventional valve-regulated lead-acid battery as shown in FIGS. 4 and 5 ensures the sealing depth of the terminal pole 412 to be equivalent to the poles 411 and 411 ′ for connection between cells, In order to control the breakage of the terminal pole 412, the depressed portion 505 is set deeper, and the lower surface 505 a which is the surface of the depressed portion 505 on the cell chamber 408 side is lowered to a position where it is connected to the upper surface of the strap 406 or strap 406 ′. Need arises. In such a design, depending on the manufacturing variation of the height of the cell 407 ′, the lower surface 505 a of the depressed portion 505 interferes with the strap 406 and / or the strap 406 ′, and the lid 501 cannot be attached to the battery case 401. End up.

  In addition, there is a method of forming the straps 406, 406 ′ on which the terminal pole 412 is formed at a position lower than the straps 406, 406 ′ on which the poles 111, 111 ′ are formed. The amount of clearance between the strap 406, 406 'and the shoulder of the pole plate of a different pole column is reduced, and there is a problem that an internal short circuit is likely to occur due to deformation due to vibration or corrosion of the pole plate. It is.

  On the other hand, as a technique for enhancing durability when vibration impact is applied to a lead storage battery, Patent Document 1 discloses a configuration in which a strap is pressed and held by a support piece hanging from a lid. In such a configuration, as described above, when the dimensional tolerance of the strap varies, the support piece is pressed against the strap with an excessive force. The strap will break. In addition, it may be impossible to attach the lid to the battery case.

  On the contrary, when the dimensional tolerance of the strap varies, the support piece and the strap do not come into contact with each other, so that the effect of holding the cell with the support piece is impaired.

  Patent Document 2 discloses that reinforcing shoulders such as PP resin are formed near both shoulders of the cell, and the cells are electrically connected to the inner wall or partition wall of the battery case. Controlling movement within the bath is shown.

However, in such a system, a lead-acid battery for an automobile using a polyethylene separator can improve vibration resistance because the separator and the reinforcing beam are welded. In the case of using a glass fiber mat or a synthetic resin fiber mat separator such as PP resin, it is difficult to weld the separator and the reinforcing beam, and even if they are welded, vibration is applied to the battery. In this case, it is difficult to improve the vibration resistance because the separator breaks in the vicinity of the welded portion between the beam and the separator.
JP 58-166632 A JP-A-7-201356

  The present invention controls the breakage of the terminal pole column during vibration shock of the control valve type lead storage battery formed by the over-partition method as described above, and significantly improves the vibration resistance. For the purpose.

  In order to solve the above-described problems, the present invention provides a cell including a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and a strap that collectively welds electrode plates having the same polarity. A plurality of the cells are housed in a cell chamber formed by partitioning the inside of the battery case with partition walls, and have inter-cell connection portions for connecting the cells adjacent to each other via the partition walls; The inter-connection portion is formed by connecting the poles provided on the strap of the cell with a connection body arranged beyond the partition wall, and has a lid for closing the opening of the battery case, A sealing agent filling pot for accommodating the inter-cell connecting portion and the tip of the white wall, and a sealing agent filled in the sealing agent filling pot for sealing between the inter-cell connecting portion and the cell chamber. And one polarity of the end cell located at both ends in the series connection of the cells. A terminal pole protruding from the trap; a depression on the outer surface of the lid; a through-hole through which the terminal pole is inserted at the bottom of the depression; and filling the depression A filler for sealing the pole pole, a protrusion for fixing the cell protruding from the strap having the terminal pole pole, and storing at least the tip of the protrusion for fixing the cell on the inner side surface of the lid The control valve type lead acid battery which has arrange | positioned at least the front-end | tip part of the said cell fixing protrusion in the filler pot for cell fixing, and the filler with which the filler pot for cell fixing of the previous period was filled is shown.

  According to the present invention, a cell-fixing protrusion is newly formed on a strap formed with a pole column for a single element, and a tip portion thereof is disposed in a filler in a cell-fixing filler pot. The lid and the lid are firmly fixed at two points, so that a remarkable effect is obtained in that breakage of the terminal pole column can be suppressed.

  The structure of the control valve type lead acid battery 101 according to the embodiment of the present invention will be described. FIG. 1 is a view showing the structure of a control valve type lead storage battery of the present invention. FIG. 1 shows a state before the lid 201 is attached to the battery case 102 in order to facilitate understanding of the structure. 2 and 3 are views showing a cross section in a state where the battery case 102 is fitted with the lid 201, and in particular, FIG. 2 is a cross-sectional view of the short end cell. Cell 108, 108 'is formed by stacking positive electrode plate 103, separator 104 made of glass fiber mat and negative electrode plate 105, and forming straps 107, 107' for connecting polar plate ears 106, 106 'of the same polarity. 109 is stored. The cell chamber 109 is formed by partitioning the inside of the battery case 102 with a partition 110.

  In the control valve type lead-acid battery 101 of the present invention, the connecting poles 112 connect the inter-cell connecting poles 111, 111 ′ protruding from the straps 107, 107 ′. The connection body 112 is disposed over the partition 110.

  FIG. 1 shows an example in which six cells 108, 108 ′ arranged in a U shape are connected in series, but the cell 108 ′ located at both ends of the series connection is connected to the outside of the battery terminal. The terminal pole column 113 used for the projection is formed on the straps 107 and 107 ′.

  In the present invention, the terminal pole column 113 of the straps 107 and 107 ′ of the end cell 108 ′ is formed, and the cell fixing protrusion 114 is also formed.

  FIG. 2 is a cross-sectional view showing a state where the lid 201 is attached to the opening of the battery case 102 shown in FIG. 1 and the control valve type lead storage battery 101 of the present invention is assembled. 2 is a cross section at a position where the cross sections of the terminal pole column 113 and the cell fixing protrusion 114 appear.

  The terminal pole column 113 is led out of the cell chamber 109 through a through hole 203 formed at the bottom of a terminal forming depression 202 provided on the outer surface of the lid 201. A terminal plate 116 is connected to the tip of the terminal pole column 113 as necessary. Depending on the terminal structure, the terminal plate 116 is not necessarily required. For example, bolts or nuts (both not shown) are insert-molded on the top surface of the terminal pole column 113, and these bolts or nuts are attached to the outer surface of the battery. It may be an exposed structure.

  The depressed portion 202 has acid resistance. A sealing agent 204 such as an epoxy resin is filled, and the terminal pole column 113 is sealed. When filling the depressed portion 202 with the sealant 204 such as epoxy resin in an uncured state, the sealant 204 flows into the cell chamber 109 through the gap between the terminal pole column 113 and the through hole 203, Since the amount of the sealing agent 204 in the depression 202 may be less than the amount necessary for sealing the terminal pole column 113, the terminal pole column is used to suppress the flow of the sealing agent 204 into the cell chamber 109. A rubber O-ring 205 can be attached to 113.

  In the present invention, the cell fixing protrusion 114 is disposed in a cell fixing filler pot 206 provided on the inner side of the lid 201, and is fixed with the filler 208 filled in the cell fixing filler pot 206.

  Since the filler 208 is for fixing the cell 108 ′ through the fixing fixing projection 114, a filler having strength and acid resistance suitable for the filler 108 is used. However, like the sealant 204, an epoxy resin is used. be able to.

  Since the cell 108 ′ can be fixed in the cell chamber 109 via the cell fixing protrusion 114, it is possible to remarkably suppress the breakage of the terminal pole column 113 at the time of vibration impact, which has occurred in the conventional control valve type lead storage battery. it can.

  FIG. 3 is a view showing another cross section of the control valve type lead storage battery 101 of the present invention. In FIG. 3, the cross section of the terminal pole column 113 and the pole columns 111 and 111 ′ is shown.

  Inside the lid 201, a sealant filling pot 207 for accommodating the inter-cell connecting portion 115 composed of the connecting body 112 and the pole columns 111 and 111 ′ is formed. By filling and solidifying an acid-resistant sealant 204 such as resin, the inter-cell connection portion 115 is sealed with the sealant 204.

  Further, the upper part of the partition wall 110 is immersed in the sealant 204, so that the adjacent cell chambers 109 are sealed in a liquid-tight and air-tight manner.

  As shown in FIG. 2, in the control valve type lead storage battery 101 of the present invention, the newly provided cell fixing protrusion 114 is fixed by the filler 208 in the cell fixing filler pot 206. Further, the fixed depth can be secured at the same level as the pole columns 111 and 111 ′. In the end cell 108 ′, the pole column 111 or the pole column 111 ′, the terminal pole column 113, and the cell fixing protrusion 114 are fixed to the lid 201. Distributed to points. As a result, it is possible to obtain a control valve type lead-acid battery that is suppressed from breaking of the terminal pole column 113 due to vibration shock and has excellent vibration resistance.

  Although FIG. 2 shows an example in which the two cell fixing filler pots 206 are independently arranged, they may be continuous. In addition, an example in which the sealant filling pot 207 and the cell fixing filler pot 206 are provided independently is shown. For example, when the lid 201 and the battery case 102 are joined by the sealant 204, the lid A groove portion (not shown) that fits into the battery case 102 is formed in 201, a sealant 204 is disposed in the groove portion, and a sealant filling pot 207 and a cell fixing filler pot 206 are inserted through the groove portion. You may provide continuously. In such a configuration, the sealant 204 and the filler 208 are used.

  In the present invention, even if the height of the straps 107 and 107 ′ varies, even if the tip position of the cell fixing projection 114 varies, the tip position does not interfere with the bottom of the cell fixing filler pot 206. The variation can be absorbed in the range. Such a configuration does not cause a problem caused by the configuration using the support piece in Patent Document 1 described above.

  Further, unlike Patent Document 2, since the straps 107 and 107 ′ can be directly fixed, the separator breakage that occurs in Patent Document 2 does not occur. In addition, it is not necessary to prepare a new fixing material such as PP resin, and the sealant 204 that seals the inter-cell connection portion 115 can be used as the filler 208 as it is.

  In addition, since the cell fixing protrusion 114 and the pole columns 111 and 111 ′ are used as common parts, the number of parts constituting the control valve type lead storage battery 101 is not increased, which is preferable in terms of productivity. The cell-fixing protrusions 114 have comb-shaped molds attached to the pole column ears 106 and 106 ′, and lead components for the cell-fixing projections 114, the terminal pole column 113, and the pole columns 111 and 111 ′. At the same time as forming the straps 107, 107 'by the burning method, placing on the mold, placing additional lead (not shown) on the pole ears 106, 106', and melting and solidifying the additional lead with a burner flame, The cell fixing protrusion 114, the terminal pole column 113, and the pole columns 111 and 111 ′ can be integrally formed on the straps 107 and 107 ′.

  Note that the straps 107 and 107 ', the cell fixing protrusions 114, the terminal pole pillars 113, and the pole poles 111 and 111' are integrally cast from the molten lead by a cast-on method, instead of welding by the burning method. May be formed.

  Hereinafter, the effects of the present invention will be described with reference to examples. The control valve type lead storage battery 101 (example of the present invention) according to the embodiment of the present invention shown in FIG. 1, FIG. 2 and FIG. 3, and the conventional control valve type lead storage battery shown in FIG. 4 and FIG. A vibration test by single vertical vibration required for a battery for a motorcycle was conducted, and the vibration resistance of each battery was compared.

  Six test valve type lead storage batteries 12V12Ah according to the present invention and the conventional example were prepared as test batteries. The vibration test was performed under the condition that the acceleration was 68.6 m / sec 2 and vibration was applied in the vertical direction at a frequency of 50 to 500 Hz for 2 hours. The results are shown in Table 1.

  When the open circuit voltage of each battery was measured after the end of the vibration, the battery of the example of the present invention had a normal value of about 12.6 V. On the other hand, in the battery of the comparative example, the voltage could not be measured, indicating an abnormal state. In addition, when a discharge test was performed on the battery of the example of the present invention, 14 Ah exceeding 12 Ah, which is the specified capacity, was secured in 10 hour rate discharge, and there was no problem in characteristics.

  Furthermore, when each battery was disassembled and the inside was examined, in the conventional battery, the terminal pole columns 412 of both electrodes were broken. In addition, no abnormality was observed in the inter-cell connection portion 504.

  In the battery of the present invention, the terminal pole column 113 of both electrodes, the inter-cell connection portion 115 and the cell fixing projection 114 are not deformed or broken, and the initial state is maintained in terms of shape, and no abnormality has occurred. It was. In the battery of the present invention, the vibration of the cell 108 ′ was suppressed by the cell fixing protrusion 114, and the vibration resistance was significantly improved as compared with the battery of the conventional example.

  According to the present invention, since the vibration resistance of the control valve type lead-acid battery can be remarkably improved, the present invention is useful for a battery that is used in an environment where a vibration shock is applied, such as a motorcycle.

The figure which shows the structure of the control valve type lead acid battery of this invention. Sectional drawing which shows the control valve type lead acid battery of this invention The figure which shows the other cross section of the control valve type lead acid battery of this invention The figure which shows the structure of the conventional control valve type lead acid battery Sectional view showing a conventional control valve type lead-acid battery

Explanation of symbols

101 Control valve type lead acid battery 102 Battery case 103 Positive electrode plate 104 Separator 105 Negative electrode plate 106, 106 'Electrode plate ear 107, 107' Strap 108, 108 'Cell 109 Cell chamber 110 Bulkhead 111, 111' Polar column 112 Connector 113 Terminal Polar column 114 Cell fixing protrusion 115 Inter-cell connection portion 116 Terminal plate 201 Lid 202 Depressed portion 203 Through hole 204 Sealant 205 O-ring 206 Cell fixing filler pot 207 Sealant filling pot 208 Filler 401 Battery 405 , 405 ′ Polar column ear 406, 406 ′ Strap 407, 407 ′ Cell 408 Cell chamber 409 Bulkhead 410 Connection body 411, 411 ′ Polar column 412 Terminal pole column 501 Lid 502 Sealant filling pot 503 Sealant 504 Connection between cells Part 505 Depression 505a Bottom surface 506 Through 507 terminal plate

Claims (1)

A plurality of cells including a positive electrode plate, a negative electrode plate, a separator disposed between the positive electrode plate and the negative electrode plate, and a strap that collectively welds electrode plates of the same polarity;
The cell is housed in a cell chamber formed by partitioning the inside of the battery case with a partition, and has an inter-cell connection part that connects the cells adjacent to each other via the partition,
The inter-cell connecting portion is formed by connecting the pole columns provided on the strap of the cell with a connecting body disposed beyond the partition wall,
Inside the lid that closes the opening of the battery case, the inter-cell connection portion and a sealing agent filling pot that accommodates the tip of the partition wall, the sealing agent filling pot is filled, and the inter-cell connection portion, Having a sealant that seals between the cell chambers;
A terminal pole protruding from one polarity strap of the end cell located at both ends in the series connection of the cells;
Having a depression on the outer surface of the lid;
It has a through-hole through which the terminal pole column is inserted at the bottom of the depressed portion, has a filler that is filled in the depressed portion and seals the terminal pole column,
A cell fixing protrusion protruding from the strap having the terminal pole;
A cell fixing filler pot that houses at least the tip of the cell fixing protrusion on the inner surface of the lid, and at least the tip of the cell fixing protrusion in the filler filled in the cell fixing filler pot in the previous period. Control valve type lead-acid battery arranged.

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