JPS5841625B2 - storage battery - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a storage battery, particularly a sealed storage battery,
The purpose is to provide a highly reliable storage battery that has good resistance to vibrations and shocks.

Sealed storage batteries, in which the electrolyte is gelled or impregnated into a porous material to regulate its flow, have extremely low self-discharge even if the partition wall penetration hole of a monoblock battery case is incompletely sealed. A proposal has already been made to simplify the structure and manufacture of the storage battery by leaving a gap between the cells and inserting the intercell connection conductor.

However, this type of battery has the disadvantage that the battery element sways due to vibrations or shocks.For this reason, a partition wall penetration hole is formed between the battery case base and the battery case cover, and the battery element is moved from the battery case base side or the battery case. Attempts have been made to provide a protrusion on the lid side to press the top surface of the inter-cell connection conductor.

However, with this structure, due to the unevenness of the height of the inter-cell connecting conductor, the protrusions cannot press the inter-cell connecting conductor with an even force, making it extremely unreliable against vibrations and shocks. It was low.

On the other hand, as a method for fixing the strap, the battery case base joint and the battery case lid joint are heated, and the tip of the fixing piece provided downward inward to the battery case lid is heated and softened, and then the battery case base is joined. A method has been proposed in which the strap and the battery case lid joint are overlapped and crimped, and at the same time the upper surface of the strap is pressed with a fixing piece.

However, this method has the disadvantage that when the tip of the fixing piece that has been softened by heating comes into contact with the strap, the strap absorbs heat and hardens.As a heating means for this purpose, the heated part of the fixing piece of the hot plate is heated to a particularly high temperature. It had the disadvantage of requiring special measures such as

The present invention aims to eliminate the drawbacks of the above two technical ideas, and will be explained in detail below with reference to the drawings.

FIG. 1 is a cutaway perspective view of essential parts showing an embodiment of the present invention.

Reference numeral 1 denotes a monoblock battery case made of synthetic resin such as polypropylene/polyethylene resin, and a battery element 2 in which cathode and anode plates and separators are laminated is housed inside.

Further, 3 is a strap that connects the cathode plates or the anode plates.

The separator is made of cotton-like fibers made of intertwined glass fibers, and has a very large liquid holding capacity and is highly effective in regulating the flow of the electrolyte. Therefore, even when the battery is shaken or shocked, the electrolyte remains causes almost no flow.

A notch 5 is formed in the partition wall 4 of the battery case matrix 1, and an inter-cell connection conductor 6 connecting the negative and anode plates of adjacent battery elements 2 is arranged in advance in the notch 5.

Reference numeral I designates a battery case lid made of synthetic resin such as polypropylene/polyethylene resin, and the battery case lid 7 covers the battery case matrix 1.

That is, a hot plate is inserted between the battery case base 1 and the battery case lid 7,
Both are pressed against the hot plate to melt the battery case base joint 8 and the battery case lid joint 9, and then the hot plate is removed and the joints 8 and 9 are crimped to bond them together. It is joined.

Further, a terminal 10 connected to the battery element 2 is formed on the battery case lid 7 in a liquid-tight manner, and an exhaust mechanism 11 is further provided in the center cell of the battery case lid 1.

A hanging wall 12 is provided on the inner surface of the battery case lid T. The hanging wall 12 is joined to the partition wall 4 of the battery case base 1, and the notch 5 of the partition wall 4 and the hanging wall 12 form a partition wall penetration hole 13. is forming.

The partition wall penetration holes 13 serve as gas flow paths between cells.

A fixing member 14 made of synthetic resin is arranged on the strap 3 and the intercell connection conductor 6.

Further, a hanging pillar 15 is formed on the inner surface of the battery case lid 7.
The fixing member joint 16 at the tip of the hanging pillar 15 is melted at the same time as the battery case base joint 8 and the battery case lid joint 9 are melted, and the battery case base joint 8 and the battery case lid joint 9 are melted together. At the time of crimping, the battery case lid joint 9 is attached to the fixing member joint 1 on the upper surface of the fixing member 14.
7, thereby pressing the strap 3 and the inter-cell connection conductor 6, and melting the fixed member joint 16.
The strap 3 and the intercell connection conductor 6 are fixed by forming the Vc shrinkage 18.

As described above, in the present invention, even if the straps 3 and the inter-cell connection conductors 6 are uneven in height, they can be fixed with an average pressing force, thereby improving resistance to vibrations and shocks.

In addition, since the fixing member 14 made of synthetic resin is used, heat is only gradually removed from the joint part 16 to the fixing member, and the strap 3 and the inter-cell connection conductor 6 can always be stably suppressed, allowing the battery to be kept within standard dimensions. It becomes easier to put it down.

Furthermore, since the FC battery case motherboard joint part 8 and the battery case lid joint part 9 are heated by the hot plate, and at the same time the fixed member joint part 16 is melted, work efficiency is particularly improved.

Next, other embodiments will be described.

2nd and 3 are a cutaway perspective view and a front sectional view of the main part, respectively.

In this embodiment, the position of the intercell connection conductor 6' can be adjusted by providing a protrusion 19' that engages with the notch 5' of the partition wall 4' on the fixing member 14/ that presses the intercell connection conductor 6'. The fixing member 1 is designed to prevent it from shifting.
By providing a locking pawl 20' for locking the fixing member 14' to the inter-cell connection conductor, resistance against rolling can be improved, and the hot plate can be attached to the fixing member joint 1 of the fixing member 14'.
Even if the fixing member 14' is brought into contact with the hot plate 7' and melted, and then pulled up, the fixing member 14' is not lifted up along with the hot plate.

Although two embodiments of the present invention have been described above, the present invention is not limited to these, and various embodiments are possible.

For example, by creating a structure in which the strap or the inter-cell connection conductor and the fixing member can be fitted, it is possible to prevent the positions of the two from shifting.

In addition, by appropriately selecting the length of the joint to the fixing member or the joint to the fixing member that protrudes from the battery case lid joint or the battery case motherboard joint, thermal bonding can be carried out using a flat hot plate. I can do it.

Furthermore, even when applied to batteries manufactured using a manufacturing method in which each joining part is brought into contact, ultrasonic vibration is applied, and the resulting frictional heat is used to bond the parts, since the fixing member is made of synthetic resin, the battery case lid and the fixing member are and can be reliably joined.

Further, when employing the present invention, it is preferable to stabilize the battery element by bringing the lower part of the electrode plate into contact with the bottom of the four battery containers.

At this time, it goes without saying that one of the negative and anode plates needs to be lifted from the bottom of the four battery containers, or a separator plate or the like must be placed to prevent short circuits at the bottom.

As described above, the present invention provides a highly reliable storage battery that has good resistance to vibrations and shocks, and has great industrial value.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a cutaway perspective view of essential parts showing an embodiment of the present invention. Second. FIG. 3 is a cutaway perspective view and a cross-sectional view of main parts showing another embodiment. 1...Four battery containers, 2...Battery element, 3
...Strap, 4. 4'... Bulkhead, 5, 5'... Notch, 6.6'...
Inter-cell connection conductor, 7...Case lid 1, 8...
...Battery container lid joint, 9...Battery container lid joint, 10
...Terminal, 11...Exhaust mechanism, 12.
... Hanging wall, 13 ... Bulkhead penetration, 14
．． 14'... fixed member, 15... hanging column, 16... fixed member joint part, 1γ, 17/
...Fixing member joint portion, 18... Shrinkage allowance, 19/... Protrusion, 201... Locking claw.

Claims (1)

[Scope of Claims] 1. In a storage battery formed by joining a battery case motherboard and a battery case cover by heat welding, a fixing member made of an electrolyte-resistant synthetic resin is disposed on the connection member between the electrode plates, At the time of thermal melting of the tank motherboard joint part and the battery case lid joint part, at least one of the fixing member joint part on the surface of the fixing member-1- and the counter-fixing member joint part provided on the inner surface of the battery case lid is melted or When the battery case base joint and the battery case lid joint are crimped together, the fixed member joint and the counter-fixing member joint are joined together, and the plate-to-plate twill member is pressed, and the fixed member joint and the pair are softened. A storage battery formed by fixing a plate-to-plate twill member by forming an appropriate melted or softened shrinkage margin at the joint of the fixing member. 2. The storage battery according to claim 1, wherein the melting or softening is caused by heating by contacting each joint with a hot plate. 3. The storage battery according to claim 1, wherein the melting or softening is caused by frictional heat caused by ultrasonic vibration when the joint parts are brought into contact with each other. 4. The storage battery according to claim 1, wherein the plate-to-plate twill member is a strap. 5. The storage battery according to claim 1, wherein the plate-to-plate twill member is an inter-cell connection conductor. 6. The storage battery according to claim 5, wherein the inter-cell connection conductor is arranged in a notch provided in a partition wall of the battery case matrix. I. The storage battery according to claim 6, wherein the fixing member engages with the cutout.