JPH0135408Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a lead-acid battery storage box for electric vehicles.

BACKGROUND OF THE INVENTION Currently, lead-acid battery storage boxes for electric vehicles such as forklifts and haulage trucks are made of wood or steel and are used solely for the purpose of storing batteries.

Problems that the invention aims to solve: However, in actual use, the stored batteries must be pressurized evenly during the charging and discharging cycles, and they must be charged outdoors regardless of the season while being stored in the storage box. Therefore, there is still a lack of consideration for battery performance when stored, such as when batteries tend to be insufficiently charged in cold regions or during freezing conditions.

Therefore, the present invention focuses on the above-mentioned problems and provides an effective solution to the problem, and provides a lead-acid battery storage box for electric vehicles that has the functions of uniformly pressurizing the stored group batteries and keeping the batteries at a constant temperature. purpose.

Means for Solving the Problems In order to achieve this objective, the present invention has the following configuration. In other words, the present invention is a storage box that stores multiple lead-acid batteries for electric vehicles, and a pressure frame and a temperature sensor are placed around each battery so that each battery is evenly pressurized, and the temperature sensor is placed at a constant level at all times. It is equipped with a heat-retaining heater so that the battery can be charged at an ambient temperature of .

Effect: With the above configuration, the multiple batteries are kept sufficiently evenly pressurized, the ambient temperature of the batteries is maintained constant, and insufficient charging due to deep discharge or temperature changes is eliminated. Become.

EXAMPLE The present invention will be explained below with reference to the drawings. FIG. 4 shows the charging characteristics of the battery in a low temperature atmosphere. From the drawing, the characteristic curve marked with ● indicates the charging state in a lower temperature atmosphere than the characteristic curve marked with Γ, and even with a temperature difference of 7 to 8 degrees Celsius, the charger's timer operation time, that is, the battery terminal voltage is detected to keep the charging current constant. The time it takes to cut off the battery after that time is different by as much as an hour, and if the timers are set at the same time, the charging time will be shorter at a lower temperature, resulting in insufficient charging. Therefore, a vicious cycle of deep discharge and insufficient charging greatly impairs battery life. Therefore, the storage box is provided with a function that allows the battery to be charged at a constant ambient temperature at all times while the battery is stored. FIG. 2 shows a conventional storage box 1 in which batteries are arranged and assembled, and the temperature and dimensions of the storage box 1 sometimes affect battery performance. However, in the present invention, each battery 4 is housed in an iron storage box 1 as shown in FIG.
It is equipped with an iron pressurizing frame 2 that surrounds the battery, and has a heating wire 3 within the frame, so it is possible to charge the batteries while heating and keeping them warm. It is possible to apply even pressure to the battery, which is extremely effective in improving battery performance. As a specific means, each battery 4 is housed in a pressurized frame,
When charging, a connection wire for the heater wire is also incorporated into the connection clip with the charger to draw the heater wire input from the charger. A temperature sensor 5 is attached near the unit cell at a position indicating the temperature of the entire battery group, and a circuit is provided that can set the output of the heater wire 3 based on the signal output from the sensor 5. Therefore, the battery can be charged in just the right amount at a constant ambient temperature even in cold regions or during freezing conditions.

Effects of the invention As described above, with this invention, each stored battery is evenly pressurized and the battery performance is stable, and the ambient temperature of the battery is maintained constant even when used in cold regions. This is of great practical value, as it allows for proper charging with just the right amount of energy, improving battery life.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view showing an embodiment of the present invention;
Figure 2 is a schematic explanatory diagram showing the conventional example, and Figure 3 is the first example.
FIG. 4, which is an enlarged view of part A in the figure, is a charging characteristic curve diagram of the battery in a low-temperature atmosphere. 1 is a storage box, 2 is a pressurizing frame, 3 is a heating wire,
4 is a battery, 5 is a temperature sensor.

Claims (1)

[Scope of utility model registration request] In a storage box that stores multiple lead-acid batteries for electric vehicles, a pressure frame and a temperature sensor are placed around each battery so that each battery is equally pressurized, and a temperature sensor is placed around each battery to maintain a constant ambient temperature at all times. A lead-acid battery storage box for electric vehicles that has a heat insulating heater to charge the battery.