CN103779521A - Lithium ion battery module fixing rack and battery component comprising same - Google Patents

Abstract

The invention discloses a lithium-ion battery module fixing frame and a battery assembly containing the same. The fixing frame is used for fixing a lithium-ion battery module, which includes an upper bracket, a lower bracket with ventilation holes and a plurality of Pull rods, one end of these pull rods is used to be fixed on the upper bracket, the other end of these pull rods is used to be fixed on the lower bracket, and the fixing frame also includes a U-shaped anti-vibration pad, and the material of the U-shaped anti-vibration pad is silica gel , the U-shaped anti-vibration pad is arranged on the lower surface of the lower bracket. By providing a U-shaped anti-shock pad made of silica gel, the lithium-ion battery module fixing frame has high shock-isolation performance and thermal insulation performance.

Description

Lithium-ion battery module holder and battery pack containing it

technical field

The invention relates to the field of lithium ion battery manufacturing, in particular to a lithium ion battery module fixing frame and a battery assembly containing the same.

Background technique

Due to the advantages of high energy, long life and stable voltage, lithium-ion batteries are widely used in energy storage systems for electric vehicles. In order to achieve a predetermined voltage and current, multiple discrete lithium-ion batteries need to be connected in series and parallel to form a lithium-ion battery module. Considering that the lithium-ion battery module will be scattered and collided during vehicle installation and transportation, the utility model patent with the authorized notification number CN203103367U provides a fixed bracket for iron-lithium batteries.

Please understand in conjunction with Figure 1 that the iron-lithium battery fixing bracket 1 includes an upper bracket 11, a lower bracket 12, a battery fixing slot 13, a ventilation hole 14, an upper card slot 15, a lower card slot 16, a packing Band limit groove and a plurality of bolts 18.

However, the existing iron-lithium battery fixing brackets have problems in terms of shock isolation and heat preservation. After experiencing frequent bumps, adjacent lithium-ion batteries will form dislocations, which will affect the stability of the output voltage. In winter, the battery has Problem with damage due to cold start.

Contents of the invention

The technical problem to be solved by the present invention is to provide a lithium-ion battery module fixing bracket and a battery assembly containing it in order to overcome the defects of low shock isolation performance and low thermal insulation performance of the battery fixing bracket in the prior art. The ion battery module fixing frame has high shock isolation performance and thermal insulation performance.

The present invention solves the above technical problems through the following technical solutions:

A lithium-ion battery module fixing frame, used to fix a lithium-ion battery module, it includes an upper bracket, a lower bracket with ventilation holes and a plurality of pull rods, one end of these pull rods is used to be fixed on the upper Bracket, the other ends of these pull rods are used to be fixed on the lower bracket, and the feature is that the fixing bracket also includes a U-shaped anti-vibration pad, the material of the U-shaped anti-vibration pad is silicone, and the U-shaped anti-vibration pad is arranged on the lower surface of the lower bracket.

Preferably, the U-shaped antivibration pad has a plurality of ventilation holes arrayed thereon.

Preferably, the lower bracket is provided with a plurality of fixed legs, and each fixed leg is provided with a through hole. Through these fixing legs, the fixing frame can be fixed to the vehicle body, preventing the whole fixing frame from moving.

Preferably, the fixing feet are arranged on the side surface of the lower bracket, and form a step with the lower edge of the side surface. These steps can facilitate the insertion of the fixing frame into the battery accommodating slot of the electric vehicle, play the dual functions of positioning and position limiting, and exert a locking force.

Preferably, the fixing frame further includes a wire harness cover, a wire routing slot is provided on the edge of the upper bracket, and the wire harness cover is used to cover and be fixed on the wire routing slot.

Preferably, the upper bracket is provided with a plurality of vent holes and a plurality of mechanical cavities, the vent holes are used to release the gas generated by the lithium-ion battery module, and the mechanical cavities are used to isolate the power connection piece. The power connection piece is embedded in the mechanical cavity, which can prevent arc discharge or short circuit between adjacent electrodes and ensure the isolation and insulation performance.

Preferably, the upper bracket is made of nylon 1010 or polypropylene, and the lower bracket is made of stainless steel or aluminum alloy. The upper bracket adopts the above-mentioned insulating materials, especially nylon 1010 material, which is not only wear-resistant, heat-resistant and acid-alkali corrosion-resistant, but also can ensure electrical insulation performance, and cooperates with the mechanical cavity on the upper bracket for embedding the power connecting piece , can prevent arc discharge or short circuit between adjacent electrodes, and ensure isolation and insulation performance. The lower bracket is made of stainless steel or aluminum alloy, which makes the fixing frame resistant to impact and friction, and can also prevent acid and alkali corrosion under the condition of using stainless steel.

Preferably, the pull rods are all sleeved in the insulating sleeve. The pull rod is wrapped with an insulating sleeve, which can prevent the pull rod from leaking electric charge to the metal casing of the electric vehicle.

Preferably, the upper bracket is provided with a plurality of accommodating grooves, and the nuts of the pull rods are embedded in the accommodating grooves. The nuts of the pull rods sink into the accommodating grooves, which can ensure the insulation performance of the entire fixing frame. In case of electric leakage of these electrodes, the danger of electrification at the end of the tie rod is prevented.

A battery assembly, which includes a lithium-ion battery module, is characterized in that the battery assembly also includes the above-mentioned lithium-ion battery module fixing frame.

On the basis of conforming to common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain preferred examples of the present invention.

The positive and progressive effect of the present invention is that the lithium-ion battery module fixing frame has higher shock-isolation performance and heat-preservation performance by providing a U-shaped shockproof pad made of silica gel.

Description of drawings

FIG. 1 is an exploded view of an existing iron-lithium battery fixing bracket.

FIG. 2 is a schematic structural view of the lithium-ion battery module fixing frame of the present invention.

FIG. 3 is an exploded view of the lithium-ion battery module fixing frame in FIG. 2 .

FIG. 4 is a schematic structural diagram of the U-shaped antivibration pad in FIG. 2 .

FIG. 5 is a schematic structural diagram of the upper bracket in FIG. 2 .

Fig. 6 is an enlarged view of part A of the upper bracket in Fig. 2 .

Explanation of reference signs:

Existing iron-lithium battery fixing bracket: 1

Upper bracket: 11 Lower bracket: 12

Battery fixing slot: 13 Ventilation hole: 14

Upper card slot: 15 Lower card slot: 16

Bolts: 18

Li-ion battery module holders: 2

Upper bracket: 21 Pull rod: 22

Lower bracket: 23 U-shaped shock pads: 24

Fixed foot: 25 Limit block: 26

Harness cover: 27 Vent: 28

Wire slot: 29 Screw section: 220

Vent: 230 Vent: 240

Mechanical cavity: 260

Li-ion battery module: 3 Exhaust valve: 31

Power connectors: 32

Detailed ways

The present invention is further illustrated below by means of examples, but the present invention is not limited to the scope of the examples.

The structure of the lithium-ion battery module fixing frame of the present embodiment is as follows:

Please understand in conjunction with Figures 2-5, the lithium-ion battery module fixing frame 2 of this embodiment is used to fix a lithium-ion battery module 3, the fixing frame 2 includes an upper bracket 21, a lower bracket with ventilation holes Bracket 23 and a plurality of pull rods 22, one end of these pull rods 22 is used to be fixed on this upper bracket 21, and the other end of these pull rods 22 is used to be fixed on the limit piece 26 of this lower bracket 23, and this pull rod 22 has The screw section 220 of the limiting block 26 is used for screw connection with the electric vehicle, the pull rods 22 are all sleeved in the insulating sleeve, and the fixing frame 2 also includes a U-shaped anti-vibration pad 24, The U-shaped anti-vibration pad 24 is made of silica gel, and the U-shaped anti-vibration pad 24 is disposed on the lower surface of the lower bracket 23 . A plurality of ventilation holes 240 are arrayed on the U-shaped antivibration pad 24 .

The lower bracket 23 is provided with a plurality of fixed legs 25, and each fixed leg 25 is provided with a through hole. The fixing feet 25 are disposed on the side surface of the lower bracket 23 and form a step with the lower edge of the side surface. The fixing frame 2 also includes a wire harness cover 27 , a wire routing slot 29 is provided at an edge of the upper bracket 21 , and the wire harness cover 27 is used to cover and be fixed on the wire routing slot 29 . The upper bracket 21 is provided with a plurality of exhaust holes 28 and a plurality of mechanical cavities 260, and these exhaust holes 28 communicate with the exhaust valve 31 of the lithium-ion battery module 3 so as to release the lithium-ion battery module. Group 3 produced gas. These mechanical cavities 260 can prevent arc discharge or short circuit between adjacent electrodes, and ensure isolation and insulation performance. The upper bracket 21 is provided with a plurality of accommodating grooves, please understand with reference to FIG. 6 , the nuts of the pull rods 22 are embedded in the accommodating grooves to realize a countersunk installation structure of the nuts. The upper bracket 21 is made of nylon 1010 or polypropylene, and the lower bracket 23 is made of stainless steel or aluminum alloy.

The installation and use principles of the lithium-ion battery module fixing frame of this embodiment are as follows:

When installing, please understand it in conjunction with Figure 2-3. First, buckle the U-shaped anti-vibration pad 24 in the chute on the lower surface of the lower bracket 23; secondly, set the upper bracket 21 and the lower bracket 23 respectively. on the upper and lower surfaces of the lithium-ion battery module 3, and are fixed by the tie rods 22; finally, the metal wires on the lithium-ion battery module 3 are arranged in the wiring groove 29, and passed through The harness cover 27 is sealed.

When in use, the lithium-ion battery module fixing frame shown in FIG. 2 is installed on the electric vehicle through the fixing feet 25 , and the power transmission line is crimped through the power connecting pieces 32 .

Compared with the existing fixing frame, the lithium-ion battery module fixing frame of this embodiment has the following technical effects:

First, it has high shock-isolation performance and thermal insulation performance. By setting the U-shaped shock-proof pad 24 made of silica gel, the shock-isolation performance of the fixed frame 2 is improved; in addition, the U-shaped shock-proof pad 24 also has high thermal insulation performance. , to avoid the problem that in winter, the bottom surface of the lithium-ion battery module 3 is directly in contact with the vehicle body and is overcooled, and the battery is damaged due to cold start.

Second, maintain the heat function of the ventilation fan, the lower bracket 23 is provided with a plurality of vents 230, and the U-shaped anti-vibration pad 24 is arrayed with a plurality of vents 240, in summer, air can pass through the vents 230, vents 240 and the gaps on both sides of the lower bracket 23 are poured into the lithium-ion battery module 3, so the heat function of the ventilation fan is maintained.

Thirdly, neat wiring and anti-oxidation, the wiring trough 29 and the wire harness cover 27 can make the wiring tidy, and can prevent metal wires from being directly exposed to be polluted or oxidized.

Fourth, to prevent the battery from bulging or bursting, the vent hole 28 and the exhaust valve 31 can discharge the gas generated by the lithium-ion battery module 3 to prevent the battery from swelling or bursting.

The battery assembly of this embodiment has the following structure:

Please refer to FIGS. 2-3 to understand that this embodiment also provides a battery assembly, which includes a lithium-ion battery module 3 and the above-mentioned lithium-ion battery module fixing frame 2 .

Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims (10)

1. A lithium-ion battery module fixing frame is used to fix a lithium-ion battery module, which includes an upper bracket, a lower bracket with ventilation holes and a plurality of pull rods, one end of these pull rods is used to be fixed on For the upper bracket, the other ends of the pull rods are used to fix the lower bracket. It is characterized in that the fixing bracket also includes a U-shaped anti-vibration pad. The material of the U-shaped anti-vibration pad is silica gel. The U-shaped anti-vibration pad is set on the lower surface of the lower bracket. 2 . The fixing frame according to claim 1 , wherein a plurality of ventilation holes are arrayed on the U-shaped antivibration pad. 3 . 3. The fixing frame according to claim 1, characterized in that, the lower frame is provided with a plurality of fixing feet, each of which is provided with a through hole. 4 . The fixing bracket as claimed in claim 3 , wherein the fixing feet are disposed on a side surface of the lower bracket, and form a step with a lower edge of the side surface. 5. The fixing frame according to any one of claims 1-4, characterized in that, the fixing frame also includes a wire harness cover, a wiring groove is arranged at the edge of the upper bracket, and the wire harness cover is used to cover And fixed in the wire slot. 6. The fixed mount according to any one of claims 1-4, wherein the upper bracket is provided with a plurality of vent holes and a plurality of mechanical cavities, and these vent holes are used to release the lithium The gas generated by the ion battery module, these mechanical cavities are used to isolate the power connector. 7. The fixing frame according to any one of claims 1-4, wherein the material of the upper bracket is nylon 1010 or polypropylene, and the material of the lower bracket is stainless steel or aluminum alloy. 8. The fixing frame according to any one of claims 1-4, characterized in that, the pull rods are all sleeved in insulating sleeves. 9. The fixing bracket according to any one of claims 1-4, wherein the upper bracket is provided with a plurality of accommodation grooves, and the nuts of the pull rods are embedded in the accommodation grooves. 10. A battery assembly comprising a lithium ion battery module, characterized in that the battery assembly further comprises the lithium ion battery module fixing frame according to any one of claims 1-9.

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