JP2005116387A - Lead-acid battery equipped with state judging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance reliability of electrical connection between a state judging device and a storage battery body, and stably operate the state judging device for a long time in a lead-acid battery integrally equipped with the state judging device. <P>SOLUTION: The lead-acid battery has a positive terminal 4 and a negative terminal formed by inserting a pole installed in an electrode group into a bushing 20 installed in a cover 3 covering a container in which the electrode group is housed and formed by connecting the bushing and the pole, and connects the state judging device with a detecting terminal 22 introduced from the bushing. A projection 23 is installed on at least a bottom of the detecting terminal. The detecting terminal is installed in the almost perpendicularly crossing direction to a virtual line connecting the positive terminal and the negative terminal. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a lead storage battery mainly used in automobiles.

  Some lead storage batteries (hereinafter referred to as storage batteries) used for starting an automobile engine are provided with an indicator for checking the state thereof. For example, Patent Document 1 discloses an indicator for a lead storage battery that displays the electrolyte specific gravity and the electrolyte surface by using a float that floats and sinks in accordance with a change in the electrolyte specific gravity. By using such an indicator, it becomes possible to predict the charged state or discharged state of the storage battery, and maintenance work such as supplementary charging or replacement fluid can be performed based on these results. Such an indicator is widely used because of its relatively simple structure.

  On the other hand, unlike the indicator as described above, a method for determining the charge / discharge state and deterioration state of the storage battery based on information obtained from the terminal voltage of the storage battery and its change, for example, information on the internal resistance, etc. Various studies have been made.

As a structure in which such a storage battery state determination display device is integrally provided in the storage battery, for example, the structure disclosed in Patent Document 2 is generally known. Here, a structure in which a voltmeter as a state determination display device is housed in a recess formed on the top surface of the lid of the storage battery is shown, and an auxiliary terminal is formed integrally with a lead bushing of the storage battery terminal. And it is set as the structure which measures the voltage between storage battery terminals by making this auxiliary terminal and the connection piece of a voltmeter contact.
JP-A-6-243900 JP 59-94381 A

  However, the structure of Patent Document 2 is a structure in which the shape of the auxiliary terminal is a simple flat plate and is simply extended from the lead bushing in the horizontal direction, and the connection between this and the contact piece of the voltmeter is only contact. Therefore, the electrolytic solution (dilute sulfuric acid) inside the storage battery may crawl up the auxiliary terminal and corrode the contact piece. In addition, the electrolytic solution adhering to the outside of the storage battery, moisture due to condensation, and dust may enter the contact portion between the auxiliary terminal and the contact piece, and the electrical connection thereof may become unstable.

  In particular, an automobile storage battery is used in a state where vibration is applied in a high temperature atmosphere exceeding 60 ° C., for example. Under such conditions, the rising of the electrolytic solution to the auxiliary terminal was promoted, and the electrolytic solution reached the voltmeter relatively early such as several months, which sometimes caused the above-described problems.

  Furthermore, the structure of Patent Document 2 has the following problems.

  That is, since the auxiliary terminals extending from the storage battery terminals are arranged in different polar terminals, the voltmeter is arranged between the positive electrode and the negative electrode terminal. Even in the case of an automotive storage battery such as the 26B17 type storage battery defined in JIS, D5301, a relatively small storage battery has a short dimension between the positive electrode and the negative electrode terminal, and the space for arranging such a voltmeter is limited. Moreover, since the stay for attaching the storage battery to the vehicle is disposed between the positive electrode and the negative electrode terminal, the display unit of the voltmeter may be covered and the display unit may not be read.

  In order to solve the above-described problem, the invention according to claim 1 of the present invention includes a determination unit that determines the state of the storage battery based on voltage information of the storage battery, and a light emitting diode, a liquid crystal panel, or the like that displays the determination result. A state discriminating device having a display means is provided, and a pole column provided in the electrode plate group is inserted into a bushing provided in a lid that covers a battery case housing the electrode plate group, and the bushing and the pole column are joined. Provided with the formed positive electrode terminal and negative electrode terminal, an exposed portion protruding from the bushing and exposed from the lid to a part of the detection terminal embedded in the lid, and derived from the exposed portion and the state determination device In a lead storage battery comprising a state determination device in which the storage battery terminal and the state determination device are electrically connected by connecting a lead wire for storage battery voltage input, the detection terminal is the front Projecting from the bushing in a direction substantially orthogonal to a virtual line connecting the positive electrode terminal and the negative electrode terminal, and a protrusion is provided on at least the bottom surface of the detection terminal from the exposed portion to the bushing. The lead acid battery provided with the state discrimination device is shown.

  According to a second aspect of the present invention, there is provided a lead storage battery comprising the state determination device according to the first aspect, wherein the state determination device includes at least a circuit board having a determination unit and a display unit. The lead wire is housed in a protective case that can be seen through, and the lead wire lead-out portion is sealed with a sealant.

  According to a third aspect of the present invention, in the lead storage battery including the state determination device according to the first or second aspect, the exposed portion is provided in a first recess provided in the lid, and the first The concave portion of 1 is filled with a sealing agent, and the connection portion between the lead wire and the exposed portion of the detection terminal is sealed in a liquid-tight manner.

  Furthermore, the invention according to claim 4 of the present invention is the lead storage battery including the state determination device according to claim 3, wherein the lid is provided with a second recess that houses the state determination device, and the first A groove for accommodating the lead wire is formed from the recess to the second recess.

  Further, the invention according to claim 5 of the present invention is the lead storage battery comprising the state determination device according to claim 4, wherein the battery case is partitioned into a plurality of cell chambers by a partition wall, and at least the second The concave portion is provided corresponding to only one arbitrary cell chamber.

  According to a sixth aspect of the present invention, in the lead-acid battery according to the fourth or fifth aspect, the first concave portion, the second concave portion and the groove portion are covered, and at least the display means can be seen through. The upper lid is attached to the lid.

  And the invention which concerns on Claim 7 of this invention stuck the seal | sticker which displayed the annotation sentence of the said display means in the lead acid battery of Claim 6 so that the boundary part of the said upper cover and the said cover might be covered. It is characterized by this.

  According to the present invention, in a lead storage battery equipped with a state discriminating device, by preventing the electrolyte from creeping into the connecting portion between the state discriminating device and the main body of the storage battery, and preventing moisture and dust from entering, Connection failure due to this is suppressed. Thereby, the reliability of a connection part can be improved and a state determination function can be provided stably over a long period of time.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing an appearance of a lead storage battery 1 provided with a state determination device according to the present invention.

  The lead storage battery 1 of the present invention has a battery case 2 that houses an electrode plate group (not shown) and a lid 3 that covers the battery case 2. The lid 2 is provided with a positive electrode terminal 4 and a negative electrode terminal 5 and is welded to a pole column derived from the aforementioned electrode plate group.

  In this embodiment, an example of a lead acid battery for starting automobiles in which six unit cells of the lead acid battery are connected in series and has a nominal voltage of 12V will be described. Therefore, the battery case 2 is partitioned into six cell chambers by partition walls therein, and the electrode plate group is accommodated in each cell chamber. In addition, an exhaust plug 6 is attached to each cell chamber. In addition, instead of the exhaust plug 6, the exhaust of 6 cells may be collected and exhausted collectively.

  In the present invention, a state determination device 7 for measuring the terminal voltage of the storage battery and determining the state such as the charge / discharge state or the deterioration state of the storage battery based on the measured value is housed in the lid 3. The state discriminating device 7 is electrically connected to the positive terminal 4 and the negative terminal 5, and this structure will be described later.

  Further, the present invention does not define a flow for state determination of the state determination device 7. Various state determination flows that have been proposed in the past for performing state determination based on the storage battery voltage can be applied.

  As shown in FIG. 2, the state discriminating apparatus 7 includes a circuit board 9 constituted by a discriminating means for performing state discrimination and a display means 8 for displaying the discrimination result, and a storage battery voltage measurement derived from the circuit board 9. Lead wires 12 and 12 '. As the display means 8, a light emitting LED or a liquid crystal panel arranged on the circuit board 9 can be used.

  Further, the circuit board 9 can be housed in the protective case 10 to prevent moisture and dust from adhering to the electrolyte and condensation from the outside and damage to the circuit board 9 due to these. In addition, the structure of the protective case 10 can use the synthetic resin molded product which opened one side of the rectangular parallelepiped in consideration of cost, productivity, and drawing of the lead wires 12 and 12 '. Further, since the display means 8 is disposed on the circuit board 9, it is necessary to use a synthetic resin material having transparency that does not hinder the visual recognition of the display means 8 from the outside of the protective case 10. It is. For example, a polycarbonate resin or an acrylic resin can be used.

  And in order to prevent the intrusion of moisture and dust as described above into the protective case 10, the circuit board 9 itself is isolated from the outside by filling the protective case 11 with a filling resin material having transparency, or It is preferable to seal at least an opening for leading out the lead wires 12 and 12 ′ of the protective case 10 with a filling resin material.

  As this filling resin material 11, an ordinary one for protecting electronic circuit components can be used. In the lead acid battery for motor vehicles, it is used in a wide temperature range of −30 ° C. to 90 ° C. On the other hand, the protective case 10, the circuit board 9, and various electronic components arranged on the circuit board 9 have different thermal expansion coefficients. Therefore, when used in a wide temperature range as described above, stresses are generated in the protective case 10 and the circuit board 9 due to different expansion amounts, and these members are cracked or cracked. The electrical connection between the various electronic components and the circuit board 9 is impaired.

  Therefore, the filling resin material 11 is preferably a flexible material. For example, a polyurethane-based resin can alleviate stress concentration by flexibly following expansion and contraction generated under a wide temperature range as described above.

  Next, a connection structure between the state determination device 7 and the storage battery main body will be described. FIG. 3 is a schematic view showing the configuration of the lead storage battery of the present invention. The lid 2 has a second concave portion 13 for accommodating the state discriminating device 7 and first concave portions 14 and 14 'corresponding to the leading end portions of the lead wires. More preferably, guide grooves 15 and 15 'for accommodating the lead wires 12 and 12' are formed between the second recess 13 and the first recesses 14 and 14 '. The state discriminating device 7 and the lead wires 12 and 12 'are accommodated in the second recess 13, the first recesses 14 and 14', and the guide grooves 15 and 15 ', respectively.

  FIG. 4 is a view showing a state in which the state discriminating device 7 and the lead wires 12 and 12 ′ are housed in the second recess 13, the first recesses 14 and 14 ′, and the guide grooves 15 and 15 ′, respectively. Here, each of the positive terminal 4 and the negative terminal 5 is provided with a detection terminal 22 and is insert-molded in the lid 3.

  In the present invention, the detection terminal 22 is disposed so as to protrude in a direction substantially orthogonal to the virtual line L connecting the center lines of the positive electrode terminal 4 and the negative electrode terminal 5. In such an arrangement of the detection terminals 22, as compared with the case where the detection terminals 22 are protruded toward the virtual line L, the state determination device 7 body is arranged closer to the positive electrode terminal 4 or the negative electrode terminal 5 side. it can. Therefore, when the storage battery body is attached to a device such as an automobile, it can be avoided that the attachment stay covers the display means 8 of the state determination device 7.

  FIG. 5 is a view showing an AA ′ cross section in FIG. 4. A lead bushing 20 is insert-molded on the lid joined to the battery case 2. The lead bushing 20 is provided with a pole column 25 connected to the electrode plate group, and the lead bushing 20 and the pole column 25 are joined at the top to constitute the positive electrode terminal 4. Note that the negative electrode terminal 5 has the same configuration as the positive electrode terminal 4.

  A part of the detection terminal 22 extending from the lead bushing 20 is exposed at the first recess 14 provided in the lid 2, thereby forming an exposed portion 24. On the negative electrode side, similarly to the positive electrode side, the first recess 14 ′ has an exposed portion 24 where the detection terminal 22 extending from the lead bushing 20 of the negative electrode is exposed. The exposed portion 24 and the lead wires 12 and 12 'are electrically connected between the storage battery terminals using the solder 26 or the like.

  Here, in the present invention, the detection terminal 22 extended from the lead bushing 20 protrudes in the horizontal direction from the insert portion 21 insert-molded on the lid 3 as shown in FIG. Protrusions 23 are provided on the bottom and side surfaces. By providing the protrusion 23, it is possible to provide a blocking property against the electrolyte rising from the storage battery to the detection terminal 22.

  As for the mechanism, the protrusion 23 significantly improves the adhesion to the lid 3 as compared with the case where the protrusion 23 is not provided in the bottom wall 23 a between the protrusions 23. This is because when the detection terminal 22 provided with the protrusion 23 is insert-molded to form the lid 3, the molten synthetic resin flowing into the bottom wall 23a and the side wall 23b of the detection terminal 22 is blocked by the side wall 23b. This is because the resin injection pressure is effectively applied to the bottom wall 23, and as a result, the adhesion between the detection terminal 22 and the lid 3 is improved. Further, the protrusion 23 can also suppress the electrolyte from rising when the contact area between the detection terminal 22 and the lid 3 is increased.

  Preferably, the first recess is used for the purpose of preventing corrosion / disconnection of the lead wire itself due to the electrolyte solution, moisture, or dust from the outside of the storage battery adhering to the connection portion between the exposed portion 24 and the lead wires 12, 12 ′. 14, 14 ′ is filled with a sealant, and the connection portion is sealed in a liquid-tight manner. As the sealant, a sealant having acid resistance considering the adhesiveness with the synthetic resin (eg, polypropylene resin) constituting the lid 3 and the time of adhesion of the electrolytic solution is used. For example, a polypropylene resin hot melt material or a polyurethane resin used as the filling resin material 11 of the state determination device 7 is used.

  Further, after the connection between the state discriminating device 7 and the positive electrode terminal 4 and the negative electrode terminal 5 is completed, the upper cover 28 covering the second concave portion 13, the first concave portions 14, 14 'and the guide grooves 15, 15' is covered. Thus, the appearance of the lead storage battery 1 can be adjusted. When such an upper lid 28 is used, the upper lid 28 needs to be made of a material having transparency enough to allow the display means 8 disposed in the state determination device 7 to be seen through.

  Furthermore, it is preferable to provide the second recess 13 for accommodating the state determination device 7 corresponding to only one arbitrary cell chamber. That is, since the state discriminating apparatus 7 is not provided across a plurality of cell chambers, a battery case corresponding to a conventional lid not provided with the second recess 13 can be used for the lead storage battery of the present invention. is there. If the second recess 13 is provided so as to extend over a plurality of cell chambers, the partition walls partitioning the plurality of cell chambers and the second recess 13 interfere with each other. This is because parts are not shared and it is difficult to reduce product costs.

  Furthermore, as shown in FIG. 7 as a preferred embodiment of the present invention, a seal 31 displaying the annotation text 30 of the display means 6 can be attached so as to cover the boundary between the upper lid 28 and the lid 3. As the seal 31, for example, an acid-resistant resin film coated is used. With this configuration, the display content of the display means 6 can be transmitted to the user without misunderstanding. Further, it is extremely effective in suppressing dust and moisture from entering the boundary between the upper lid 28 and the lid 3.

  The lead storage battery provided with the state determination device of the present invention can improve the reliability of the connection between the state determination device and the storage battery body, and is used as a lead storage battery for automobiles used under severe conditions such as high temperature and vibration. can do.

The figure which shows the external appearance of the lead acid battery by this invention The figure which shows a state discrimination device The figure which shows the structure of the lead acid battery by this invention The figure which shows the structure of the cover upper surface of the lead acid battery by this invention. The figure which shows the AA 'cross section of FIG. Diagram showing lead bushing The figure which shows the lead acid battery of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Lead acid battery 2 Battery case 3 Lid 4 Positive electrode terminal 5 Negative electrode terminal 6 Exhaust plug 7 State discrimination device 8 Display means 9 Circuit board 10 Protective case 11 Filling resin material 12, 12 'Lead wire 13 2nd recessed part 14, 14' 1st 1 recess 15, 15 ′ guide groove 20 lead bushing 21 insert part 22 detection terminal 23 protrusion 23 a bottom wall 23 b side wall 24 exposed part 25 pole pillar 26 solder 27 sealant 28 top cover 30 commentary 31 seal

Claims (7)

A state discriminating means for discriminating the state of the storage battery based on voltage information of the storage battery, and a state discriminating device having a display means such as a light emitting diode or a liquid crystal panel for displaying the discrimination result;
Inserting the pole column provided in the electrode plate group into the bushing provided on the lid that covers the battery case containing the electrode plate group, and having a positive electrode terminal and a negative electrode terminal formed by joining the bushing and the electrode column,
Providing an exposed portion that protrudes from the lid to a part of the detection terminal protruding from the bushing and embedded in the lid,
In a lead storage battery including a state determination device that electrically connects a terminal of the storage battery and the state determination device by connecting the exposed portion and a lead wire for battery voltage input derived from the state determination device. ,
The detection terminal protrudes from the bushing in a direction substantially orthogonal to a virtual line connecting the positive electrode terminal and the negative electrode terminal,
A lead storage battery comprising a state determining device, wherein a protrusion is provided on at least the bottom surface of the detection terminal from the exposed portion to the bushing. The state discriminating device stores the circuit board having the discriminating means and the display means in at least a protective case that allows the display means to be seen through, and seals the lead-out portion from the case of the lead wire with a sealant. A lead storage battery comprising the state determination device according to claim 1. The exposed portion is provided in a first recess provided in the lid, and a sealing agent is filled in the first recess to seal the connection portion between the lead wire and the exposed portion of the detection terminal in a liquid-tight manner. The lead acid battery provided with the state discriminating device according to claim 1 or 2 characterized by stopping. The second cover for storing the state determination device is provided in the lid, and a groove for storing the lead wire is formed from the first recess to the second recess. Lead-acid battery equipped with a state discrimination device. The state determination device according to claim 4, wherein the battery case is divided into a plurality of cell chambers by partition walls, and at least the second recess is provided corresponding to only one arbitrary cell chamber. Lead-acid battery with The lead storage battery according to claim 4 or 5, wherein an upper lid that covers the first concave portion, the second concave portion, and the groove portion and at least allows the display means to be seen through is attached to the lid. The lead-acid battery according to claim 6, wherein a sticker displaying the annotation text of the display means is attached so as to cover a boundary portion between the upper lid and the lid.

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