JPH0561955U - Sealed lead acid battery - Google Patents

Abstract

(57) [Abstract] [Purpose] The purpose is to simplify the structure for applying pressure to the unit cell group of the sealed lead-acid battery and to make the pressure uniform. [Structure] An electrode plate group consisting of an anode plate, a cathode plate and a retainer is encased in a synthetic resin bag-like body, and the required number of unit cells are stacked to form a unit cell group, which is housed in a pair of upper and lower outer cases having rigidity. In the sealed lead-acid battery described above, a unit cell group in which a required number of unit cells having the electrode plate facing the elastic body contacting the upper and outer case as a cathode plate is stacked is pressed by the elastic body.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a sealed lead acid battery in which a required number of unit cells are stacked.

[0002]

[Prior Art]

 A unit cell group 1 in which a required number of unit cells enclosed in a bag made of a synthetic resin are stacked is used to pressurize the unit cell group 1 by a pair of upper and lower pressure cases 2 and 2'having rigidity. The pair of upper and lower pressure cases 2 and 2'fix the unit cell group 1 in a pressurized state. In order to fix the upper pressure case 2 and the lower pressure case 2 ', a mating fixing portion 3 having a claw cut-out shape is provided on the long side surfaces of these pressure cases 2 and 2'to be opposed to each other. The notch of the nail is hooked on the lower part of the hole to fix the unit cell group 1 under pressure. An upper outer case 4 is fixed to the lower outer case 4 '.

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional pressing structure uses a pair of upper and lower pressing cases 2 and 2'having rigidity, and the unit cell group 1 is fixed in both the upper pressing case 2 and the lower pressing case 2 '. Due to this, the press-fitting cases 2 and 2'are provided with the fitting fixing portions 3 in the form of claw cuts on the long side surfaces. Therefore, there is a problem that the structure of the pressure cases 2 and 2'becomes complicated and the cost and man-hours of the pressure cases 2 and 2'increase. In addition, since the unit cell structure has a variation in thickness, the unit cell group 1 becomes thicker or thinner, resulting in a stronger or weaker pressing force, which makes it difficult to make the pressing force uniform. Therefore, if the applied pressure becomes strong, the liquid may leak, and if it becomes weak, there is a problem that the capacity and life are affected.

[0004]

[Means for Solving the Problems]

 In the present invention, the unit cell group is pressed by an elastic body.

[0005]

[Action]

 The present invention uses an elastic body to pressurize the unit cells to make them uniform.

[0006]

【Example】

 An embodiment of the present invention will be described. After the unit cell group 1 in which a number of unit cells contained in a synthetic resin bag-like body are stacked is arranged on the lower exterior case 4 ', an elastic body acting as a pressure spring on the unit cell group 1 5 is placed, and the upper outer case 4 is pushed on the elastic body 5. When pressed in this state, the upper outer case 4 and the lower outer case 4'are fitted to each other at a place where a predetermined pressure is applied due to the elasticity of the elastic body 5. In this case, the electrode plate of the unit cell group 1 facing the elastic body 5 is used as a cathode plate having rigidity higher than that of the anode plate, and the entire electrode plate is uniformly pressed.

[0007]

[Effect of the device]

 As described above, according to the present invention, cost and man-hours can be reduced by simplifying the pressurization structure of the sealed lead-acid battery, and the uniform pressing force can improve the battery performance. It is of great practical value, such as being able to stabilize it.

[Brief description of drawings]

FIG. 1 is a side view showing a schematic structure of a sealed lead acid battery of the present invention.

FIG. 2 is a perspective view of an elastic body according to the present invention.

FIG. 3 is a perspective view showing a schematic configuration of a conventional sealed lead-acid battery.

[Explanation of symbols]

Reference numeral 1 is a storage battery group, 4 is an upper outer case, 4'is a lower outer case, and 5 is an elastic body.

Claims (1)

[Scope of utility model registration request] 1. An outer case having a pair of upper and lower rigidity by stacking a required number of unit cells in which a group of electrode plates consisting of an anode plate, a cathode plate and a retainer is enclosed in a synthetic resin bag-like body to form a unit cell group. In a sealed lead acid battery to be housed, a sealed lead acid battery in which a unit cell group of unit cells having an electrode plate facing an elastic body abutting the upper and outer case as a cathode plate is pressed by the elastic body.