Lithium ion polymer battery pack assembling structure and assembling method

[0031] Example one:

[0032] Such as figure 1 , 2 3, the battery pack assembly structure includes an upper cover 1, a lower cover 2, N batteries located between the two, and N-1 assembly racks 3. The battery includes a battery slot 6 and a battery fixing portion 7. The battery slot 6 is rectangular, and the battery slot 6 extends outward to form a battery fixing portion 7. The positive and negative lugs 8 arranged on the battery slot 6 extend outside the fixing portion 7, as shown in the above figure. The battery shown is a single-electrode battery, the positive and negative ears 8 of the single-electrode battery are located on the same side, and the adjacent batteries are separated by the assembly frame 3, which is a rectangular parallelepiped, and the upper and lower surfaces are opened in the middle. Rectangular battery accommodating cavity. The outer periphery of the battery accommodating cavity is the frame part of the assembly frame 3. The battery accommodating cavity matches the battery slot 6 so that the battery slot 6 extends into the battery accommodating cavity. The frame part matches the battery fixing part 7, and the height of the assembly frame 3 is greater than The thickness of the battery, the height of the assembly frame 3 is 10-20% higher than that of the battery; the four corners of the assembly frame 3 are provided with connecting holes 9 for piercing bolts to clamp the battery fixing part 7 between the frame parts of the two assembly frames 3 , The positive and negative ears 8 of the battery extend outside the frame part of the assembly frame 3. The negative ear 8 of the battery is bent downward to overlap the positive electrode 8 of the next battery, and the positive electrode 8 of the battery is bent upward to meet the upper one. The negative pole 8 of the battery is overlapped. The assembly structure of the battery pack is an upper and lower layered structure. The upper cover 1 is provided above the battery pack, and the lower cover 2 is provided under the battery pack. The upper and lower covers 2 are rectangular parallelepipeds matching the battery, and the four corners of the two are equipped with an assembly frame. 3 The connecting hole 9 is an opposite through hole, and the lower surface of the upper cover 1 is provided with a rectangular battery accommodating cavity matching the battery slot 6. The sides of the upper and lower covers 2 and the assembling frame 3 are provided with a rectangular mounting groove 11, and the mounting groove 11 is embedded with a fixing block 4 with two threaded holes. The fixing block 4 is located inside the overlap of the positive and negative lugs 8, and , A clamping block 5 is provided on the outside of the overlap of the negative lug 8, two screws 10 pass through the clamping block 5 and screwed on the fixing block 4, pressing the overlapped positive and negative lugs 8 on the fixing block 4 and clamping Between the blocks 5, the mounting slots 11 corresponding to the positions of the electrode tabs 8 are all located on the same side of the assembly frame 3, and the mounting slots 11 on the adjacent assembly frames 3 are arranged in a staggered arrangement.

[0033] If the battery is a single cell battery, such as figure 2 , 3 As shown, the battery fixing portion 7 is located at the lower end of the battery slot 6; the upper surface of the lower cover 2 is a flat surface to resist the battery fixing portion 7.

[0034] If the battery is a dual-slot battery, the battery fixing part 7 is located in the middle of the battery slot 6; the upper surface of the lower cover 2 is provided with a rectangular battery accommodating cavity matching the battery slot 6, and the height of the battery accommodating cavity is higher than the height of the battery slot 6. —20%.

[0035] The anode of the battery pack is the anode of the first battery, which is bent upwards. The side of the upper cover 1 is provided with a mounting slot 11 that is the same as the assembly frame 3, and a fixing block 4 is embedded in the slot. Between block 4 and clamping block 5, when connecting to the outside, you only need to loosen the screw 10, put the external guide on the anode, and tighten the screw 10; the cathode of the battery pack is the negative electrode of the Nth battery, and Bend upwards and set on the N-1th assembly frame 3 to prevent downward protruding from the lower cover 2. When the battery is a dual-slot battery, an installation slot for placing the fixing block can be opened on the lower cover, so that the block and the clamping block fix the negative tab of the Nth battery.

[0036] To facilitate processing, the upper cover 1 can be a combination of a flat plate and an assembly frame 3; if the battery is a battery with a double-slot structure, the lower cover 2 can also be a combination of a flat plate and an assembly frame 3. The fixing portion 7 of the battery 1 can be punched out with a connecting hole opposite to the assembly frame 3, or it can be fixed in the assembly frame 3 by being clamped.

[0037] Assembly steps:

[0038] 1) Stack the lower cover 2, N batteries, N-1 assembly racks 3, and upper cover 1 with battery accommodating cavity on top of each other, and the batteries are separated by the assembly rack 3;

[0039] 2) The bolts pass through the upper cover 1, the battery, the assembling frame 3, and the lower cover 2 and then are screwed with the nuts to fix the layered battery pack;

[0040] 3) Knock the fixing block 4 made of metal copper into the installation slot 11 on the assembly frame 3;

[0041] 4) Bend the negative tab 8 of the battery downwards to overlap the positive tab 8 of the next battery, and bend the positive tab 8 upwards to overlap the negative tab 8 of the previous battery;

[0042] 5) A clamping block 5 is provided at the overlap of the positive and negative electrode tabs 8 of the battery. The screw 10 passes through the clamping block 5 and is screwed to the fixing block 4, thereby fixing the overlapped positive and negative tabs 8 on the On the assembly frame 3, the series connection of the battery pack is realized.

[0043] Embodiment two:

[0044] Such as Figure 4 , 5 , 6, and 7, the battery is a double-electrode battery, the positive and negative lugs 8 of the single-electrode battery are located on both sides of the battery, and the corresponding mounting grooves 11 are located on both sides, and the positive lug 8 of the battery is bent upward and The negative electrode of the previous battery is overlapped, the tab 8 on the other side is bent downward to overlap the positive electrode of the next battery, and the mounting slots 11 on the assembly frame 3 on the same side are arranged at intervals.

[0045] If the battery is a single cell battery, such as Figure 5 As shown, the battery fixing portion 7 is located at the lower end of the battery slot 6; the upper surface of the lower cover 2 is a flat surface to resist the battery fixing portion 7.

[0046] If the battery is a dual-cell battery, such as Image 6 , 7 As shown, the battery fixing part 7 is located in the middle of the battery slot 6; the lower surface of the lower cover 2 is provided with a rectangular battery receiving cavity matching the battery slot 6, and the height of the battery receiving cavity is 10-20% higher than the height of the battery slot 6.