JPS5843470Y2 - Automotive auxiliary battery device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an auxiliary battery device for an automobile that can be operated without any trouble by switching even when the automobile battery cannot fully perform its functions in a cold region or the like.

An automobile battery is essential for starting an engine, but in cold regions where the temperature drops to -108C to -20'C, its function deteriorates and the engine will not start.

This tendency is particularly noticeable as the battery wears down.

However, if the engine starts, the dynamo will charge the battery and the battery will recover, but if the engine does not start, there is nothing that can be done.

By the way, 12V batteries are commonly used as automobile batteries.

The 12V model is composed of six 2■ unit cells connected in series, but only one of the six unit cells has a decreased electromotive force and an increased internal resistance due to wear and tear. or two.

Therefore, the engine can be started by compensating for the consumed unit cells.

This idea was developed in consideration of the above points, and includes an auxiliary battery device that automatically activates a changeover switch as soon as the car battery runs out, and connects the unit cells in the auxiliary battery device in series with the car battery. It can be used by connecting to.

This invention will be explained below with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of this invention, and FIG. 2 is a circuit diagram of FIG. 1.

In these figures, 1 is an original automobile battery, which is provided with terminals 2 and 3 to which positive and negative electrodes are connected, respectively, and 4 is an auxiliary battery device with a unit cell 5 inside.
and an automatic changeover switch 6 are housed therein, and terminals 7 and 8 are provided on the outside.

The configuration of the automatic changeover switch 6 is that the positive electrode of the unit cell 5,
It is excited by the fixed contacts 6a and 6b connected to the negative electrode, the switching contact piece 6C that conducts with the terminal 8, the spring 6d that applies a spring force to bring the switching piece 6C into contact with the fixed contact 6a, and the automobile battery 1. and a coil 6c that acts to bring the switching contact piece 6c into contact with the fixed contact 6b.

In use, as shown in Fig. 2, terminal 2 of the automobile battery 1 is connected to terminal 7 of the auxiliary battery device 4 with a conductor 9, and a load such as a starter motor is connected to the terminal 3 and terminal 8 via the switch SW. All you have to do is connect.

Next, the operation will be explained.

When the automobile battery 1 is normal, its terminal voltage also has a specified value, so a specified current also flows through the coil 6c, and the attraction force is stronger than the force of the spring 6d, so that the switching contact piece 6
c contacts the fixed contact 6b as shown by the dotted line.

Therefore, the unit cell 5 is disconnected, and the load is supplied with power only from the automobile battery 1.

If the output of the automobile battery 1 becomes less than the specified value, the current in the coil 6c becomes smaller, and as a result, the force of the spring 6d becomes stronger than its attractive force, and therefore the switching contact piece 6
．． c & automatically switches to make contact with the fixed contact 6a.

Therefore, since the unit cell 5 is connected in series with the automobile battery 1, the output voltage is compensated and it is possible to supply the same amount of power to the load as under normal conditions.

Note that since the current flowing through the coil 6e is weak, there is no substantial problem.

Further, the suction mechanism using the coil 6e of the switching contact piece 6c is well known as a relay or the like, so its details are omitted.

Further, the automatic changeover switch 6 is not limited to the one shown in FIG. 2, and various other types can be adopted.

As explained in detail above, this invention allows the unit cell to be automatically connected and disconnected in series to the car battery using an automatic changeover switch, so even in an emergency when the engine does not start, the unit cell can be easily connected to and disconnected from the car battery. It is possible to temporarily compensate for battery consumption and perform trouble-free startup.

Additionally, since this device only has a built-in unit cell, it is much lighter in volume and weight than a car battery, and therefore can be installed relatively easily even in cars that do not have space to store a spare car battery. It is extremely effective in practice.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of this invention, and FIG. 2 is a circuit diagram of FIG. 1. In the figure, 1 is a car battery, 2, 3, 7, 8 are terminals,
4 is an auxiliary battery device, 5 is a unit cell, 6 is an automatic changeover switch, 5a, 5b are fixed contacts, 6c is a changeover piece,
6d is a spring, 6e is a coil, 9 is a conductor, L is a load, and SW is a switch.

Claims (1)

[Scope of utility model registration request] An automatic changeover switch that connects the unit cell in series with the automotive battery when the voltages of the unit cell and the automotive battery are below a specified value, and disconnects the unit cell from the automotive battery when the voltage is above the specified value. An auxiliary battery device for an automobile, comprising: