JP2005198405A - Voltage stabilizer of battery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a voltage stabilizer of a battery which can remarkably improve the performance of an ignition system, an electrical system by connecting a ground wire to a cathode side by aiming at the connection of the cathode side in the circuit substrate of the voltage stabilizer to the cathode terminal of the battery. <P>SOLUTION: The stabilizer of the battery stabilizes the power source voltage of a battery 5 by the current discharged from an electric storage circuit 12 by connecting a positive electrode line 4a and a negative electrode line 4b respectively connected to the positive electrode terminal 5a and the negative electrode terminal 5b of the battery 5 to the electric storage circuit 12 providing a plurality of capacitor elements 12a, 12b on the circuit substrate 3. A ground line 9 is connected to the ground side (negative electrode side circuit) of the electric storage circuit 12 by forming a terminal board 1a for clamping a terminal fitting 9a of a ground line 9 in a body case 1 of the insulating material for housing a circuit substrate 3 and fixing the ground line 9 to this terminal board 1a by terminal board clampers 7a, 7b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a battery voltage stabilizer having a terminal block to which a ground wire is connected.

As an earthing system applied to an automobile, for example, as described in Japanese Patent Application Laid-Open No. 2001-257044, a body earth that connects an end portion of an earth wire connected to various electrical devices to a body is known. This comprises a joint connector for ground by fitting and connecting a male connector in which a plurality of ground wires are concentrically connected to a joint connector formed of a female conductive resin material. Fasten the joint connector to the body with bolts. In this way, body grounding can be performed simply by fastening the joint connector of the ground joint connector to the body with bolts, so instead of directly connecting each ground wire directly to the body, it is once connected to the ground joint connector. Like to do.
JP 2001-257044 A

  However, in the above conventional technique, the body is electrically large because it is connected to a body made of a steel plate having a conductivity that is about 1/10 that of copper used for the ground wire. There is a problem that it becomes a resistance, adversely affects various electrical devices such as an engine ignition system, audio, air conditioning, lighting device, etc., and the original potential cannot be exhibited. To solve this problem, it is conceivable to connect the ground wire directly to the negative terminal of the battery. However, in the case of a ground wire with excellent noise reduction and electrical conductivity, the ground wire itself is thick, so many terminal wires of the ground wire are concentrated and connected to the negative terminal of the battery in one place. There is a problem that this is difficult both physically and in terms of installation work.

  On the other hand, in general, when an accelerator operation that makes the vehicle start suddenly is performed, the battery voltage instantaneously decreases and the ignition characteristics are deteriorated. In addition, various types of audio devices, air conditioners, lighting devices, etc. Although there is a problem that causes a decrease in the performance of the electrical equipment, the applicant has developed a voltage stabilizer that is always directly connected to the positive terminal and the negative terminal of the battery as a measure to deal with the problem. In order to solve such problems, the present invention focuses on the fact that the negative electrode side of the circuit board of the voltage stabilizer is connected to the negative electrode terminal of the battery, and by connecting a ground wire to the negative electrode side, An object (problem) of the present invention is to provide a battery voltage stabilizer capable of greatly improving the performance of an ignition system and an electrical system.

  In order to solve the above problems, the following measures are taken in the present invention. In other words, the battery voltage stabilizer according to the invention of claim 1 connects the positive and negative wires connected to the positive and negative terminals of the battery to a power storage circuit having a plurality of capacitor elements provided on the circuit board. A battery voltage stabilizing device for stabilizing a battery power supply voltage by a current discharged from the storage circuit, wherein a terminal block for fastening a ground wire terminal fitting to a main body case of an insulating material that houses the circuit board And the ground wire is fixed to the terminal block with a terminal block fastener, so that the ground wire is connected to the ground side of the power storage circuit.

According to the first aspect of the present invention, a terminal block is formed on the main body case of the battery voltage stabilizer, and the terminal block is connected to the ground for plug cap of, for example, a direct ignition system type (DIS type) spark plug. Mounting on the circuit board by fastening the terminal fittings of the ground wire connected to the wire, cylinder head, intake manifold, cylinder head cover, throttle body, etc., using terminal block fasteners (for example, bolts and nuts) The grounding side (negative electrode side) of the stored power storage circuit is used for connection. For this reason, the operation | work which attaches the said terminal metal fitting to the negative electrode terminal of a battery can be made unnecessary, arrangement | positioning of the ground wire in an engine room can be gathered up successfully, and it becomes possible to heighten the dress-up effect.
In addition, the ground wire is directly connected to the negative electrode terminal of the battery via the negative electrode side of the circuit board, so that the potential of the ignition system / electrical device system can be fully exhibited.
In addition, since a storage circuit made of a capacitor element is mounted on the circuit board of the battery voltage stabilizer, when the battery voltage drops, the charging current stored in the capacitor element of the storage circuit is discharged, Compensating for an instantaneous current shortage due to a voltage drop of the battery, it is possible to smoothly supply a current to an electric load connected to the battery and to stabilize the battery voltage.

  According to a second aspect of the present invention, there is provided the battery voltage stabilizer according to the first aspect, wherein the circuit board is disposed on the lower surface of the terminal block and the metal plate for the seat plate is disposed on the upper surface. The circuit board and the metal plate are fixed to the terminal block by the terminal block fastener.

  According to the second aspect of the present invention, the metal plate and the circuit board are attached to the main body case at the same time with the terminal block sandwiched by the terminal block fasteners. Therefore, the circuit board is also attached to the main body case simultaneously with the fastening of the metal plate. The attachment for attaching the circuit board to the main body case and the attachment work can be eliminated. Further, by arranging the metal plate on the terminal block, the terminal fitting of the ground wire can be reliably connected to the negative electrode side of the circuit board via the terminal block fastener.

  According to a third aspect of the present invention, there is provided the battery voltage stabilizing device according to the first or second aspect, wherein the main body case forming the terminal block is provided with a protrusion, and the metal plate is engaged with the protrusion. A possible recess is formed.

  According to the third aspect of the present invention, the metal plate can be easily positioned and arranged on the terminal block by allowing the protrusion of the main body case to be engaged with the concave portion of the metal plate. Can be done more efficiently.

  According to a fourth aspect of the present invention, there is provided the battery voltage stabilizing device according to any one of the first to third aspects, wherein a case cover for covering the terminal block from above is detachably provided on the terminal block. Thus, a fastening window for allowing the ground wire to face the protruding portion is formed.

  In the invention according to claim 4, when the case cover is provided on the terminal block, the fastening window having a size that does not interfere with the fastening of the ground wire with the protruding portion formed on the terminal block is projected. Since it is provided so that it is supported and partitioned by the part, the strength of the fastening window can be maintained, and the grounding metal fittings and metal plates are protected from being exposed to the outside. It is possible to avoid contact of the positive electrode member.

  According to a fifth aspect of the present invention, in the battery voltage stabilizer according to any one of the first to fourth aspects, the metal plate and the terminal block fastener are gold-plated. .

  According to the fifth aspect of the present invention, since the metal plate and the terminal block fastener are subjected to gold plating, the electrical connection of the terminal fitting of the ground wire can be reliably performed.

  A sixth aspect of the present invention relates to the battery voltage stabilizer according to any one of the first to fifth aspects, wherein the grommet has a waterproof function so as to wrap each terminal fitting of the positive electrode line and the negative electrode line. The grommet is fitted and fixed to the main body case, and the circuit board is fixed to the terminal fittings via circuit board fasteners.

  In the sixth aspect of the present invention, the terminal fittings of the positive electrode wire and the negative electrode wire are fixed so that the grommet is fitted to the main body case, and the terminal fitting is fastened to the circuit board by the circuit board fastener. The circuit board can be fixed to the main body case with the circuit board fastener and the terminal block fastener, so that the fastener for attaching the circuit board to the main body case can be eliminated, and the mounting work for that is also unnecessary. It will be possible.

  A seventh aspect of the present invention relates to the voltage stabilizer for a battery according to any one of the first to sixth aspects, wherein the battery in a practical use state is in parallel with the power storage circuit of the circuit board. Provided is a first LED that emits light with a power supply voltage and a battery voltage checker circuit that controls light emission of the second LED that emits light with a color different from the first LED when the first LED is turned off when the power supply voltage during normal use is less than In addition, the main body case is provided with holes for allowing the first and second LEDs to face each other.

  In the seventh aspect of the invention, the battery voltage checker circuit is provided with the first LED and the second LED, and both the first and second LEDs are exposed to the outside from the hole of the main body case. For example, a battery voltage check device can be connected to a battery installed in the engine room of a car. When using it, the power supply voltage of the battery can always be checked even when the engine is stopped, so whether the battery is in practical use, should be charged, recharged with battery fluid, Can easily manage the battery maintenance by visually checking whether the battery should be replaced. In addition to the storage circuit, the battery voltage checker circuit is mounted on the circuit board in the battery voltage stabilizer, so the battery voltage stabilizer can be made compact as a whole, saving the engine room space. This is advantageous for the dress-up effect.

  The invention according to claim 8 relates to the voltage stabilizer for a battery according to claim 7, wherein a reverse connection prevention circuit is connected, and when the reverse connection prevention circuit is normally connected to the battery, The first LED or the second LED blinks, but the first LED and the second LED are turned off when they are connected in reverse polarity.

In the invention according to claim 8, the reverse connection prevention circuit includes a pair of relays, a pair of movable switches opened and closed by the relays, and a reverse connection detection diode. The reverse connection prevention circuit is connected to the battery. When connected normally, the battery current flows through the reverse connection detection diode, and either the first LED or the second LED incorporated in the battery voltage checker circuit blinks according to the battery voltage at that time, and is normal. Shows that it is connected to. On the other hand, when connected in reverse polarity, the battery current does not flow through the reverse connection detection diode, so that both the first LED and the second LED are turned off. You will be able to know.

According to the present invention, the following effects can be achieved.
That is, according to the first aspect of the present invention, the work of attaching the terminal fitting to the negative electrode terminal of the battery can be eliminated, the arrangement of the ground wires in the engine room can be successfully gathered, and the dress-up effect is enhanced. In addition, the ground wire is directly connected to the negative terminal of the battery via the negative side of the circuit board, so that the potential of the ignition system and electrical equipment system can be fully demonstrated. The circuit board of the voltage stabilizer is equipped with a storage circuit consisting of a capacitor element. Therefore, when the battery voltage drops, the charging current stored in the capacitor element of the storage circuit is discharged and the battery voltage drop Compensates for an instantaneous current shortage caused by the, and can smoothly supply the current to the electrical load connected to the battery, thus stabilizing the battery voltage.

  According to the second aspect of the present invention, since the circuit board is attached to the main body case simultaneously with the fastening of the metal plate, the mounting tool for attaching the circuit board to the main body case, and the mounting work thereof can be made unnecessary. By arranging the metal plate on the terminal block, there is an effect that the terminal fitting of the ground wire can be reliably connected to the negative electrode side of the circuit board via the terminal block fastener.

  According to the third aspect of the present invention, by aligning the concave portion of the metal plate with the protrusion of the terminal block, the metal plate can be easily positioned and placed on the terminal block, and the ground wire can be attached efficiently. There is an effect that can be made.

  Further, according to the invention of claim 4, when the case cover is provided on the terminal block, the case cover is supported by the protrusion provided on the terminal block, so that the strength of the fastening window can be maintained, Since the ground metal terminal fitting, the metal plate, and the like are protected from being exposed to the outside, it is possible to prevent the external positive electrode member from coming into contact for some reason.

  According to the invention described in claim 5, since the metal plate and the terminal block fastener are subjected to gold plating, the gap between the ground wire terminal fitting and the metal plate or the terminal block fastener in the terminal block. There exists an effect which can raise an electrical conductivity.

According to the invention described in claim 6, since the circuit board is fixed to the main body case by the circuit board fastener and the terminal block fastener, it is easy to attach the circuit board to the main body case. It is possible to obtain a battery voltage stabilizer that can be firmly attached by work and has excellent earthquake resistance against vehicle vibration.
Therefore, the fastener for attaching the circuit board to the main body case can be eliminated, and the attachment work for that purpose can be eliminated.

Further, according to the seventh aspect of the present invention, for example, when the battery voltage check device is used by being connected to a battery installed in an engine room of an automobile, the power supply voltage of the battery is maintained even when the engine is stopped. Since it can always be checked, it is possible to manage the maintenance and maintenance of the battery by visually checking whether the battery is in practical use, should be charged, should be replenished with battery fluid, or should be replaced. Can be easily performed.
In addition to the storage circuit, the battery voltage checker circuit is mounted on the circuit board in the battery voltage stabilizer, so the battery voltage stabilizer can be made compact as a whole, saving the engine room space. This is advantageous for the dress-up effect, and has the effect of realizing a multi-function battery voltage stabilization device such as a central earthing system function, a battery voltage stabilization function, and a battery voltage management function.

  According to the eighth aspect of the present invention, the reverse connection prevention circuit can easily determine whether or not an electrical circuit mounted with a power storage circuit, a battery voltage checker circuit, or the like mounted on a circuit board is reversely connected. There is an effect that the capacitor element in the power storage circuit can be prevented from early deterioration and damage in advance.

The embodiment of the battery voltage stabilizer according to the present invention will be described in detail with reference to FIGS. 1 to 9 by taking as an example a case where the battery voltage stabilizer is connected to a battery installed in an automobile engine room.
1A is an external plan view of a battery voltage stabilizer in a state in which a ground wire is not connected, FIG. 1B is a left side view showing an enlarged left side of FIG. 1A, and FIG. FIG. 2 is an enlarged cross-sectional view taken along line 2-2 in FIG. 1, and FIG.

  The battery voltage stabilizer includes a body case 1 that is substantially box-shaped with an insulating material such as a synthetic resin material, and a bottom plate 2 that is also formed of an insulating material. The circuit board 3 is accommodated in the housing. As shown in FIG. 6, an electric circuit EC including a protection circuit 10, a reverse connection prevention circuit 11, a storage circuit 12, and a battery voltage checker circuit 13 is formed on the circuit board 3. The electric circuit EC will be described in detail later.

  First, the structure of the main body case 1 will be described mainly with reference to FIGS. 1 and 2 (a), on the right side of the main body case 1, a terminal fitting 4a1 of a positive electrode wire 4a and a negative electrode wire 4b connected to a positive electrode terminal 5a and a negative electrode terminal 5b of a battery 5 (see FIG. 6). 4b1 are connected. Specifically, waterproof grommets 4a2 and 4b2 are provided so as to wrap the terminal fittings 4a1 and 4b1, and bolts 3a1 and 3b1 which are circuit board fasteners and flanges are provided in holes 3a and 3b formed in the circuit board 3. The terminal fittings 4a1 and 4b1 are fastened to the positive side circuit and the negative side circuit of the circuit board 3 by the nuts 3a2 and 3b2 (see FIGS. 3 and 4). Then, the right side of the circuit board 3 is positioned and fixed to the main body case 1 through the grommets 4a2 and 4b2 by fitting the fitting grooves formed in the waterproof grommets 4a2 and 4b2 into predetermined positions of the main body case 1. .

  Next, the structure on the left side of the main body case 1 will be described. In the following description, the same member or part will be described by adding a single reference numeral to avoid complication. That is, a flat terminal block 1a having a step is formed on the left side (FIGS. 1 and 2) of the main body case, a gold-plated metal plate 6 is formed on the upper surface of the terminal block 1a, and a circuit board 3 is formed on the lower surface. As shown in FIG. 4, each of the terminal block 1a, the metal plate 6, and the circuit board 3 has three bolt holes 1b, 6b, and 3c arranged at substantially equal intervals in corresponding positions. As shown in FIG. 5, the bolts with holes 7a and 7b are flanged bolts 7a and 7b, which are three terminal block fasteners plated in gold and plated in these bolt holes, and are fastened together by the fasteners 7a and 7b. The circuit board 3 is electrically connected to the negative side circuit (ground side).

  After the circuit board 3 and the metal plate 6 are fastened by the terminal block fasteners 7a and 7b, the case cover 8 is mounted from above so as to cover the terminal block 1a with the bolts 8b inserted through the bolt holes 8a. At this time, the protrusions 1c provided on the terminal block 1a and the protrusions 8c provided on the case cover 8 are attached to each other to form struts, and the terminal fitting of the ground wire 9 (see FIG. 7) between the struts. A fastening window 1d (see FIG. 1B) that can accommodate 9a is provided.

  In addition, on the upper surface of the main body case 1, a hole 1 e for allowing the two-color LED 14 of the battery voltage checker circuit 13 (see FIG. 6) mounted on the circuit board 3 to face and the circuit board 3, for example, a two-component epoxy resin An injection hole 1f for injecting a potting material is provided, and after the injection, a belt-like logo sticker 1g is adhered.

  In addition, the metal plate 6 is provided with a recess 6a that prevents interference with the protrusion 1c of the terminal block 1a, thereby facilitating positioning with respect to the terminal block 1a.

  Thus, when the left side of the circuit board 3 is fastened to the main body case 1 by the fasteners 7a and 7b, the main case 1 is sealed from the outside by fastening the bottom cover 2 shown in FIG. 5 to the main case 1 with the screws 1j. The circuit board 3 is coupled to the main body case 1 by bolts 3a1, 3b1 and nuts 3a2, 3b2 which are circuit board fasteners, and at the same time connected to the positive side circuit and the negative side circuit of the electric circuit EC. The terminal block fasteners 7a and 7b are connected to the main body case 1 to be connected to the negative electrode side circuit.

Next, the electric circuit EC mounted on the circuit board 3 will be described. That is, the electric circuit 2 includes a protection circuit (fuse) 10, a reverse connection prevention circuit 11, a power storage circuit 12, and a battery voltage checker circuit 13, as shown in FIG.
The protection circuit 10 is connected to the positive terminal of the battery 5.
The reverse connection prevention circuit 11 includes a pair of relays, a pair of movable switches opened and closed by the relays, and a reverse connection detection diode 11a and a diode 11b. In the non-energized state in which the battery 5 is not connected, the pair of movable switches are in the positions illustrated in FIG. 6. When the battery 5 is connected and energized, the diodes 11 a and 11 b are energized. As a result, the first LED 14a or the second LED 14b of the battery voltage checker circuit 13, which will be described later, blinks to indicate that it is normally connected. On the contrary, when the polarities are reversed, the diodes 11a and 11b are not energized, so that both the first LED 14a and the second LED 14b are extinguished, and the positive line 4a and the negative line 4b (FIG. 1, 3) is in a state of being reversely connected to the battery 5, so that it is possible to prevent early deterioration and damage of capacitor elements in the storage circuit 12 to be described later. I have to.

  The storage circuit 12 is one of the main components of the battery voltage stabilization device, and is connected in parallel to the reverse connection prevention circuit 11 to stabilize the supply voltage to each electrical component and ignition system, and the potential of the vehicle For example, an organic semiconductor aluminum solid capacitor (electrolytic capacitor having a capacity of 0.1 μF) 12a (5 is installed in this embodiment) 12a and a ceramic capacitor (5 is installed) 12b Are connected in parallel. When the battery 5 is energized, a voltage is stored in each of the capacitors 12a and 12b, and functions to supply a voltage to the battery 5 when the battery 5 voltage drops.

  Next, the battery voltage checker circuit 13 will be described. The battery voltage checker circuit 13 is connected in parallel to the power storage circuit 12 and includes the following components. That is, the battery voltage checker circuit 13 includes a two-color LED 14 in which a first LED 14a that emits green light and a second LED 14b that emits red light are integrated, a first Zener diode 15 that functions as a voltage check function, and a second Zener diode 16 The switching function element 17 including the first transistor 17a, the second transistor 17b, the third transistor 17c, and the fourth transistor 17d for switching control of the light emission of the first and second LEDs 14a and 14b, and a timer formed of an IC. A circuit 18 is provided.

Whether the first Zener diode 15 has a power supply voltage in a practical use state of the battery 5 of, for example, 12 volts or more, the 12 volts as a first reference value, and is the first reference value or more? It is to check whether or not. That is, the second transistor 17b is turned on when a voltage greater than or equal to the first reference value is applied to the first Zener diode 15, and is turned off when a voltage smaller than the first reference value is applied.
The second Zener diode 16 operates so that the power supply voltage of the battery operates at a second reference value (for example, 11 volts) that is lower than the first reference value (12 volts), but does not operate below that. That is, when the battery voltage falls between the first reference value (11 volts) and the second reference value (12 volts), the second Zener diode 16 operates to turn on the fourth transistor 17d. When the terminal voltage of the battery acting on the two Zener diode 16 becomes less than the second reference value (11 volts), the fourth transistor 17d is turned off.

  The collector of the first transistor 17a in the switch function element 17 is connected to the output side of the first and second LEDs 14a and 14b, and the collector of the second transistor 17b is connected to the input side of the second LED 14b (red LED). The collector of the third transistor 17c is connected to the input side of the first LED 14a (green LED), is connected to the output side of the first Zener diode 15 to the base of the second transistor 17b, and is connected to the base of the fourth transistor 17d. It is connected to the output side of the diode 16.

  The timer circuit 18 controls, for example, the light emission period of the first LED 14a and the second LED 14b. The first pin for GND, the second pin for trigger, the third pin for output, the fourth pin for reset, Pin No. 5 with voltage control No. 5, pin No. 6 for threshold, No. 7 pin for resistance, and No. 8 pin for Vcc, No. 3 pin is connected to the base terminal of the first transistor 17a The fourth pin (for reset) is connected to the collector of the fourth transistor 17d.

  Various ground wires 9 (see FIG. 7) provided on the terminal block 1 a of the main body case 1 are electrically connected to the ground side circuit of the electric circuit 2.

  In the figure, reference numerals R1 to R10 are resistors, 20 and 21 are capacitors for removing noise, 22 is a capacitor for determining the blinking cycle of the first and second LEDs 14a and 14d, and 23 is for circuit protection. Each zener diode is shown.

The operation of the battery voltage checker circuit 13 is as follows.
(When the power supply voltage is 12 volts or more)
A positive line 4a and a negative line 4b of the battery voltage stabilizer are connected to a predetermined positive terminal 5a and a negative terminal 5b of the battery 5, respectively. The first Zener diode 15 is energized and the second transistor 17b is turned on, whereby the third transistor 17c is turned off. On the other hand, since the voltage acting on the second Zener diode 16 is 13 volts or more, it is energized and the fourth transistor 17d is turned on, whereby the voltage acts on the fourth pin and the timer circuit 18 is turned on. An ON state (non-reset state) is entered, and an output signal is applied to the first transistor 17a from the 3rd pin and the ON operation is performed. Thus, when the first transistor 17a is turned on by a signal periodically output from the timer circuit 18, the first LED 14a emits green light and turns off when turned off. Therefore, the first transistor 17a is repeatedly turned on and off. Thus, the first LED 14a blinks in green, and it can be known that the power supply voltage of the battery is at or above the practical use voltage level of 12 volts and is normal.

(When the power supply voltage drops between 11 and 12 volts)
In this case, the first Zener diode 15 is turned off. As a result, the second transistor 17b is turned off, the third transistor 17c is turned on, and the first LED 14a is turned off. On the other hand, since the 2nd Zener diode 16 is continuing ON state, it switches to 1st LED14a and 2nd LED14b blinks, emitting red light. This informs that the battery terminal voltage is in a state of decreasing between 11 volts and 12 volts.

(When the power supply voltage is less than 11 volts)
In this case, the second Zener diode 16 is de-energized and the fourth transistor 17d is turned off. Then, the timer circuit 18 is reset, the output becomes zero, and the first transistor 17a is turned off. As a result, both the first and second LEDs 14a and 14b are turned off, and the battery terminal voltage is less than 11 volts, indicating that the battery is running out.

(When power supply voltage drops suddenly)
Since the power storage circuit 12 is connected in parallel with the battery voltage checker circuit 13, even when the battery voltage is being checked, a sudden voltage drop occurs in the battery voltage and a current shortage occurs. Since the charging current stored in the storage circuit 13 is supplied to the ignition system and electrical components via the battery 5, the potential of the vehicle can be extracted, so that the battery voltage can be stabilized. Become.

Thus, the circuit board 3 on which the electric circuit EC including the protection circuit 10, the reverse connection prevention circuit 11, the storage circuit 12, and the battery voltage checker circuit 13 is mounted is attached to the main body case 1 of the battery voltage stabilizer. Since the wire 4a and the negative electrode wire 4b are fastened to the main body case 1, it is connected to the positive electrode side circuit and the negative electrode side circuit of the circuit board 3, and the positive electrode wire 4a and the negative electrode wire 4b are connected to each other in FIG. A battery voltage stabilizer as shown in a) can be completed.
When the ground wire 9 is attached to the body case 1, as shown in FIGS. 7 and 8, the terminal metal 9a is attached to the bolt 7a upright on the terminal block 1a through the terminal metal 9a of the ground wire 9 and the nut 7b. Fasten to metal plate 6. Next, by attaching the case cover 8 to the terminal block 1a with the bolts 8b, as shown in FIG. 9, a battery voltage stabilizer in a form in which the ground wire 9 is connected can be obtained.

  As described above, according to the present embodiment, when the ground wire 9 is attached, the ground wires 9 can be collectively attached to the terminal block 1a of the battery voltage stabilizer, so that the negative electrode of the battery 5 can be attached. The operation of attaching the terminal fittings 9a to the terminals one by one can be eliminated, the dressing effect on the ground wire wiring in the engine room can be enhanced, and the ground wire 9 can be routed through the negative circuit on the circuit board 3. Since the battery is directly connected to the negative electrode terminal 5b (see FIG. 6), the efficiency of the ignition system / electric device system can be improved. Further, the battery voltage stabilizer 13 includes a storage circuit 12 formed of a capacitor element. As a result, even when the battery voltage drops, current can be supplied smoothly to the electrical load, thus greatly improving the engine output and the performance of each electrical insertion. There can be effectively.

  Further, the circuit board 3 can connect the positive wire 4a to the positive circuit by the circuit board fasteners 3a1 and 3a2, and the negative wire 4b to the negative circuit by the fasteners 3b1 and 3b2, and can be used for the terminal block. By fastening the fasteners 7a and 7b, the ground wire 9 can be connected to the negative circuit on the circuit board 3, and a reliable and reliable electrical connection can be realized.

  In addition, since the concave portion 6a of the metal plate 6 can be set on the terminal block 1a while aligning with the protrusion 1c of the terminal block 1a, the metal plate 6 can be easily positioned and placed on the terminal block, and the ground wire is attached. Can improve the efficiency.

  Further, the case cover 8 is formed with the fastening window 1d in a state where the projection 8c is attached to the projection 1c of the terminal block 1a, so that the strength of the case cover 8 can be increased, and the ground wire 9 Since the terminal fitting 9a, the metal plate 6 and the like are protected from being exposed to the outside, a short circuit can be avoided.

  Moreover, since the metal plate 6 and the terminal block fasteners 7a and 7b are subjected to gold plating, when the ground wire 9 is fastened, resistance loss between them can be suppressed.

  Further, since the circuit board 3 is fixed to the main body case 1 by the circuit board fasteners and the terminal block fasteners, the circuit board 3 has a large holding force with respect to the main body case, and is also resistant to vibration during vehicle travel. Not only can a battery voltage stabilizer excellent in vibration resistance be obtained, but the circuit board fasteners 3a1, 3a2, 3b1, 3b2 and terminal block fasteners 7a, 7b can be used to attach the circuit board to the body case. The number of parts can be reduced because it is also used as a fastener.

  Also, when using the battery voltage stabilizer connected to the battery installed in the engine room of the car, it is always connected to the battery, so the power supply voltage of the battery is always kept even when the engine is stopped. Easily manage battery maintenance and maintenance by visually checking whether the battery is in practical use, should be charged, should be replenished with battery fluid, or should be replaced. There is an advantage that can be done.

  In addition to the storage circuit, the battery voltage checker circuit is mounted on the circuit board in the battery voltage stabilizer, so the battery voltage stabilizer can be made compact as a whole, saving the engine room space. This is advantageous for the dress-up effect, and has the effect of realizing a multi-function battery voltage stabilization device such as a central earthing system function, a battery voltage stabilization function, and a battery voltage management function.

In the present embodiment, the reverse connection prevention circuit 11 including the pair of relays, the pair of movable switches opened and closed by the relays, and the reverse connection detection diode is provided in the electric circuit EC. Is normally connected to the battery 5, the battery current is supplied to the reverse connection detection diodes 11 a and 11 b, so that the first LED 14 a or the first LED 14 a incorporated in the battery voltage checker circuit 13 according to the battery voltage at that time is connected. One of the 2LEDs 14b blinks to indicate that it is normally connected. On the other hand, when the polarity is reversed, the battery current is not supplied to the reverse connection detection diodes 11a and 11b, so that both the first LED 14a and the second LED 14b are turned off, and the reverse connection state is established. You will know that there is. As described above, the reverse connection prevention circuit 11 can easily determine whether or not the electric circuit EC mounted with the battery circuit 12 mounted on the circuit board 3, the battery voltage checker circuit 13 and the like is reversely connected. There is an effect that the early deterioration and damage of the capacitor element can be prevented without fail.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the present invention can be applied even if there is a design change or the like without departing from the gist of the present invention. included.
For example, although the case where the present invention is applied to an automobile has been described in the above embodiment, the present invention can also be applied to a two-wheeled vehicle, a motor boat, a snow vehicle, and the like.
In the above-described embodiment, the timer circuit 18 is provided to cause the LEDs 14a and 14b to flash and emit light. However, the timer circuit may be omitted and lighted up.

(A) is an external appearance top view of the voltage stabilizer of the battery which concerns on embodiment of this invention, (b) is a left view of (a). (A) is the arrow sectional enlarged view of the main body case in the 2-2 line of Fig.1 (a), (b) is principal part sectional drawing which expanded and showed the A section of (a). It is a disassembled perspective view explaining the structure which attaches a positive electrode wire and a negative electrode wire to a circuit board. It is the disassembled perspective view which decomposed | disassembled and showed the structure by which a circuit board and a metal plate are fastened by the terminal block of a main body case. It is the external appearance disassembled perspective view which showed the state which attaches a case cover to a terminal block. It is the electric circuit diagram mounted in the circuit board of the voltage stabilizer of a battery. It is an external appearance perspective view which shows the state before fastening a ground wire to the voltage stabilizer of a battery. Similarly, it is an external perspective view showing a state before the case cover is attached to the terminal block. It is an external appearance perspective view of the battery voltage stabilizer in the state by which the earth wire was fastened.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main body case 1a Terminal block 1c Protrusion part 2 Bottom cover 3 Circuit board 4a Positive electrode wire 4b Negative electrode wire 4a1, 4b1 Terminal metal fitting 4a2, 4b2 Grommet 5 Battery 5a Positive electrode terminal 5b Negative electrode terminal 6 Metal plate 7a Bolt (fastener for terminal blocks)
7b Nut (terminal block fastener)
8 Case cover 9 Ground wire 9a Terminal fitting 10 Protection circuit 11 Reverse connection prevention circuit 12 Storage circuit 13 Battery voltage checker circuit 14a First LED
14b Second LED
15 First Zener Diode 16 Second Zener Diode 17 Switch Functional Element 18 Timer Circuit EC Electric Circuit S Space in the Body Case

Claims (8)

  Connect the positive and negative wires connected to the positive and negative terminals of the battery to a power storage circuit with multiple capacitor elements on the circuit board, and stabilize the power supply voltage of the battery by the current discharged from the power storage circuit. A voltage stabilizer for a battery, wherein a terminal block for fastening a ground wire terminal fitting is formed on a body case of an insulating material that accommodates the circuit board, and the ground wire is connected to the terminal block with a fastener for a terminal block. The battery voltage stabilizer is configured such that the ground wire is connected to the ground side of the power storage circuit by being fixed at a point.   The circuit board is disposed on the lower surface of the terminal block and the metal plate for the seat plate is disposed on the upper surface, and the circuit board and the metal plate are fixed to the terminal block by the terminal block fastener. The voltage stabilizer for a battery according to claim 1.   The battery voltage stabilizer according to claim 1, wherein a protrusion is provided on the main body case forming the terminal block, and a recess that can be engaged with the protrusion is formed on the metal plate.   4. A fastening window for allowing the ground wire to face the protruding portion is formed on the terminal block by detachably providing a case cover that covers the terminal block from above. Battery voltage stabilizer.   The battery voltage stabilizer according to any one of claims 1 to 4, wherein the metal plate and the terminal block fastener are gold-plated.   The terminal fittings of the positive electrode line and the negative electrode line are fitted and fixed to the main body case via a grommet having a waterproof function, while the circuit board is attached to the terminal fittings via a circuit board fastener. The battery voltage stabilizer according to any one of claims 1 to 5, wherein the battery voltage stabilizer is fixed.   In parallel with the power storage circuit of the circuit board, a first LED that emits light at a power supply voltage in a practical use state of the battery, and the first LED is turned off when the power supply voltage in a normal use state is less than the first LED. 2. A battery voltage checker circuit for controlling light emission of a second LED that emits light of a color different from that of the first LED, and a hole for allowing the first and second LEDs to face the main body case. The voltage stabilizer for a battery according to claim 6.   When a reverse connection prevention circuit is connected to the circuit board between the battery and the storage circuit, and the reverse connection prevention circuit is normally connected to the battery, the first LED or the second LED blinks. 8. The battery voltage stabilizer according to claim 7, wherein the first and second LEDs are extinguished when connected in reverse polarity.

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