A stable wiring lithium ion cell structure

Abstract

The utility model relates to lithium battery technical field discloses a kind of lithium ion cell structure of stable wiring, including heat dissipation baffle, the inside of heat dissipation baffle is equipped with lithium ion cell body by front and rear end position, the top of heat dissipation baffle is provided with cover, the both sides of cover are equipped with connecting box by rear position, the inside of connecting box is equipped with insulating spring by lower position, the both sides of two lithium ion cell body are respectively provided with electrode sheet one and electrode sheet two, the electrode sheet one and electrode sheet two in same measurement are respectively inserted into the inside of connecting box by the end of lithium ion cell body far away, by cover, connecting box, insulating spring, electrode sheet one, can be shrinked compensation, to improve connection stability, high-frequency vibration can be buffered simultaneously, reduce the probability of connection break, can further improve wiring stability, facilitate to enhance torsional capacity, facilitate to improve cover installation stability, reduce cable break probability.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery technology, specifically to a lithium-ion cell structure with stable wiring. Background Technology

[0002] The structure of a lithium-ion battery cell is a closed energy unit composed of multiple functional layers precisely stacked or wound. The core design goal is to maximize energy density, ensure safety and cycle life. During production, different specifications of power banks often require customized lithium batteries, which requires splicing multiple lithium batteries together and connecting the positive and negative terminals.

[0003] A search revealed a Chinese patent for a reliable lithium battery cell module, publication number CN210516790U, which includes two or more cells, a bracket, and a terminal block. The cells are flat and have positive and negative tabs. The bracket has several positioning grooves. The terminal block has several wire-passing holes.

[0004] The aforementioned lithium battery cells effectively improve the wiring reliability of lithium battery cell modules. They can be combined and applied to products such as power banks as needed. Due to the basic positioning and wire bonding stability guarantee, they can be directly applied to products or reused with an external casing, making them highly versatile.

[0005] However, its structure is relatively simple, only guiding the cover plate through the positioning protrusion. The wiring part is located at the cover plate, lacking additional fixation for the cover plate, which can easily lead to cable breakage. Furthermore, the cable is directly connected to the cover plate, resulting in low protection performance. When the battery box is subjected to continuous vibration, the connection is prone to breakage, posing a certain safety hazard. Utility Model Content

[0006] The purpose of this invention is to provide a lithium-ion battery cell structure with stable wiring, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A robust wiring lithium-ion cell structure includes a heat dissipation partition, wherein lithium-ion cell bodies are installed at both the front and rear ends of the heat dissipation partition, a cover plate is provided at the top of the heat dissipation partition, and connection boxes are provided at the rear ends of both sides of the cover plate.

[0009] An insulating spring is provided at the lower part of the interior of the connecting box. Electrode plate one and electrode plate two are respectively provided on both sides of the two lithium-ion battery cell bodies. The ends of electrode plate one and electrode plate two located on the same side, away from the lithium-ion battery cell bodies, extend into the interior of the connecting box. The parts of electrode plate one and electrode plate two extending into the connecting box are welded together. A pressure plate is adhered to the upper part of the interior of the connecting box. An anti-bending tube is provided at the rear of the upper and lower ends of the pressure plate. A wire harness body is provided inside the anti-bending tube. The bottom end of the wire harness body is welded to the top end of electrode plate two.

[0010] Preferably, the insulating spring is wavy, and under the elastic force of the insulating spring, the top surface of the second electrode sheet is in contact with the bottom surface of the pressure plate.

[0011] Preferably, the top of the heat dissipation partition is fixedly installed with positioning protrusions at both the front and rear ends, and the front and rear ends of the cover plate are provided with positioning slots that are compatible with the positioning protrusions.

[0012] Preferably, the top of the heat dissipation partition is provided with a plurality of anti-slip protrusions, the bottom surface of the cover plate is in contact with the top surface of the heat dissipation partition, and the bottom end of the cover plate is provided with an anti-slip groove that is compatible with the anti-slip protrusions.

[0013] Preferably, the sides of electrode plate one and electrode plate two are fitted to the inner wall of the connecting box, and the surfaces of electrode plate one and electrode plate two are roughened.

[0014] Preferably, through holes that adapt to and match electrode plate one and electrode plate two are provided at the upper and lower ends of the cover plate, and a U-shaped bend is provided at the connection between electrode plate one, electrode plate two and the lithium-ion cell body.

[0015] Preferably, the side of the cover plate and the side of the heat dissipation partition are on the same horizontal line, and the top surface of the heat dissipation partition is fixed by the cover plate with modified epoxy resin adhesive.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This utility model, through the setting of a cover plate, a connecting box, and insulating springs in conjunction with electrode plate one and electrode plate two, provides elastic support during wiring by means of insulating springs. At the same time, it can compensate for the thermal expansion of electrode plate one and electrode plate two to improve connection stability. It can also buffer high-frequency vibration and reduce the probability of connection breakage. Meanwhile, the pressure plate is attached to the connecting box to press the electrode plates, and the included anti-bending tube provides anti-bending protection, further improving the stability of the wiring.

[0018] By setting up positioning protrusions, positioning slots, anti-slip protrusions, and cover plates, the positioning protrusions can be used for positioning guidance, and the anti-slip protrusions can be inserted into the anti-slip grooves at the bottom of the cover plate. After adhesion, the probability of the cover plate sliding to the side can be effectively reduced, which can enhance the torsional resistance, improve the installation stability of the cover plate, and reduce the probability of cable breakage. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a lithium-ion battery cell with a stable wiring in an embodiment of the present invention.

[0020] Figure 2 This is a cross-sectional view of the connection between the insulating spring, the pressure plate, and the second electrode sheet in this embodiment of the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of the heat dissipation partition, cover plate, and insulating spring in the embodiment of this utility model.

[0022] In the diagram: 1. Lithium-ion battery cell body; 2. Heat dissipation plate; 3. Cover plate; 4. Connector box; 5. Insulating spring; 6. Electrode plate one; 7. Electrode plate two; 8. Pressure plate; 9. Anti-bending tube; 10. Wire harness body; 11. Positioning protrusion; 12. Positioning slot; 13. Anti-slip protrusion. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] Combination Figures 1-3 A lithium-ion battery cell structure with stable wiring includes a heat dissipation partition 2. The lithium-ion battery cell body 1 is installed at both the front and rear ends of the heat dissipation partition 2. A cover plate 3 is provided at the top of the heat dissipation partition 2, and a connection box 4 is provided at the rear ends of both sides of the cover plate 3.

[0026] See Figure 2 and Figure 3Furthermore, an insulating spring 5 is provided at the lower part of the interior of the connecting box 4. Electrode sheet 6 and electrode sheet 7 are respectively provided on both sides of the two lithium-ion battery cell bodies 1. The ends of electrode sheet 6 and electrode sheet 7 located on the same side, away from the lithium-ion battery cell body 1, extend into the interior of the connecting box 4. The parts of electrode sheet 6 and electrode sheet 7 extending into the connecting box 4 are welded together. A pressure plate 8 is bonded to the upper part of the interior of the connecting box 4. An anti-bending tube 9 is provided at the rear of the upper and lower ends of the pressure plate 8. A wire harness body 10 is provided inside the anti-bending tube 9. The bottom end of the wire harness body 10 is welded to the top end of electrode sheet 7. The insulating spring 5 is wavy. Under the elastic force of the insulating spring 5, the top surface of electrode sheet 7 is in contact with the bottom surface of the pressure plate 8. Through holes that are compatible with electrode sheet 6 and electrode sheet 7 are provided at the upper and lower ends of the cover plate 3. A U-shaped bend is provided at the connection between electrode sheet 6, electrode sheet 7 and lithium-ion battery cell body 1.

[0027] Specifically, by stacking the electrode plates 6 and 7 of the two lithium-ion battery cell bodies 1 into the connector box 4, their range of motion can be limited, preventing excessive displacement after wiring. The pressure plate 8, after being glued to the connector box 4, restricts the electrode plates 6 and 7, preventing them from moving upwards when pulled, further reducing the probability of connection breakage. The electrode plates 6 and 7 are elastically supported by the insulating springs 5 ​​below. Simultaneously, when the electrode plates 6 and 7 expand and contract due to heat, the elastic force of the insulating springs 5 ​​compensates for this, preventing them from loosening and swaying arbitrarily, thus improving connection stability. The insulating springs 5 ​​also buffer high-frequency vibrations. Meanwhile, the wire harness body 10 passes through the anti-bending tube 9 and is welded to the electrode plate 7. The anti-bending tube 9 limits the bending angle of the wire harness body 10's inserted portion, preventing excessive bending above the connector box 4.

[0028] Example 2

[0029] See Figure 3 Furthermore, based on Embodiment 1, the following is further obtained: positioning protrusions 11 are fixedly installed at the front and rear ends of the top of the heat dissipation partition 2; positioning slots 12 that are compatible with the positioning protrusions 11 are provided at the front and rear ends of the cover plate 3; a number of anti-slip protrusions 13 are provided at the top of the heat dissipation partition 2; the bottom surface of the cover plate 3 is in contact with the top surface of the heat dissipation partition 2; and an anti-slip groove that is compatible with the anti-slip protrusions 13 is opened at the bottom of the cover plate 3; the sides of electrode sheet 1 6 and electrode sheet 2 7 are in contact with the inner wall of the connecting box 4; the surfaces of electrode sheet 1 6 and electrode sheet 2 7 are roughened; the side of the cover plate 3 is at the same horizontal line as the side of the heat dissipation partition 2; and the top surface of the heat dissipation partition 2 is fixed by the cover plate 3 with modified epoxy resin adhesive.

[0030] Specifically, by setting the cover plate 3, a stable platform can be provided for fixing the cable. When the cover plate 3 is installed, the positioning protrusion 11 and the positioning slot 12 can provide positioning to improve the installation efficiency. Furthermore, by using the anti-slip protrusions 13 set on the top surface of the heat dissipation partition 2 to engage with the anti-slip groove below the cover plate 3, the strength of the connection between the heat dissipation partition 2 and the cover plate 3 can be effectively improved, reducing the probability of the cover plate 3 sliding after bonding, thereby reducing the impact on the stability of the cable connection.

[0031] In actual operation, the steps of reinforcing the lithium-ion battery cell body 1 and the heat dissipation partition 2 with fiber tape and epoxy board in the existing technology will not be described in detail here. By stacking the electrode plates 6 and 7 of the two lithium-ion battery cell bodies 1 and inserting them into the connection box 4, their range of motion can be limited to prevent them from shifting excessively after wiring. After the pressure plate 8 is glued to the connection box 4 with fixing adhesive, it can restrict the electrode plates 6 and 7 to prevent them from moving upward when pulled, further reducing the probability of connection disconnection. The electrode plates 6 and 7 are elastically supported by the insulating spring 5 set below. At the same time, when the electrode plates 6 and 7 expand and contract with heat, the elastic force of the insulating spring 5 can compensate to prevent them from loosening and shaking at will, so as to improve the connection stability.

[0032] Meanwhile, the insulating spring 5 can buffer high-frequency vibration. At the same time, the wire harness body 10 passes through the anti-bending tube 9 and is welded to the electrode plate 7. The anti-bending tube 9 can limit the bending angle of the wire harness body 10 extending into the tube, preventing it from bending excessively above the connector box 4.

[0033] By setting the cover plate 3, a stable platform can be provided for fixing the cable. When the cover plate 3 is installed, the positioning protrusion 11 and the positioning slot 12 can provide positioning to improve the installation efficiency. Furthermore, by using the anti-slip protrusions 13 set on the top surface of the heat dissipation partition 2 to engage with the anti-slip groove below the cover plate 3, the strength of the connection between the heat dissipation partition 2 and the cover plate 3 can be effectively improved, reducing the probability of the cover plate 3 sliding after bonding, thereby reducing the impact on the stability of the cable connection. At the same time, after the cable harness body 10 is connected, it can be connected to the appropriate contact of the external cable tray.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lithium-ion battery cell structure with stable wiring, comprising a heat dissipation partition (2), wherein lithium-ion battery cell bodies (1) are installed at both the front and rear ends of the heat dissipation partition (2), and a cover plate (3) is provided at the top of the heat dissipation partition (2), characterized in that: Connecting boxes (4) are provided on both sides of the cover plate (3) at the rear position; An insulating spring (5) is provided at the lower part of the interior of the connecting box (4). Electrode plate one (6) and electrode plate two (7) are respectively provided on both sides of the two lithium-ion battery cell bodies (1). The ends of electrode plate one (6) and electrode plate two (7) located on the same side, away from the lithium-ion battery cell body (1), extend into the interior of the connecting box (4). The parts of electrode plate one (6) and electrode plate two (7) extending into the connecting box (4) are welded together. A pressure plate (8) is adhered to the upper part of the interior of the connecting box (4). An anti-bending tube (9) is provided at the rear position of the upper and lower ends of the pressure plate (8). A wire harness body (10) is provided inside the anti-bending tube (9). The bottom end of the wire harness body (10) is welded to the top end of electrode plate two (7).

2. The lithium-ion cell structure with stable wiring according to claim 1, characterized in that: The insulating spring (5) is wavy, and under the elastic force of the insulating spring (5), the top surface of the electrode sheet (7) is attached to the bottom surface of the pressure plate (8).

3. The lithium-ion cell structure with stable wiring according to claim 1, characterized in that: The top of the heat dissipation partition (2) is fixedly installed with positioning protrusions (11) at both the front and rear ends, and the front and rear ends of the cover plate (3) are provided with positioning slots (12) that are compatible with the positioning protrusions (11).

4. The lithium-ion cell structure with stable wiring according to claim 2, characterized in that: The top of the heat dissipation partition (2) is provided with several anti-slip protrusions (13), the bottom surface of the cover plate (3) is in contact with the top surface of the heat dissipation partition (2), and the bottom end of the cover plate (3) is provided with an anti-slip groove that is compatible with the anti-slip protrusions (13).

5. The lithium-ion cell structure with stable wiring according to claim 1, characterized in that: The sides of electrode sheet one (6) and electrode sheet two (7) are attached to the inner wall of the connecting box (4), and the surfaces of electrode sheet one (6) and electrode sheet two (7) are roughened.

6. The lithium-ion cell structure with stable wiring according to claim 2, characterized in that: Through holes are provided at the upper and lower ends of the cover plate (3) to adapt to and match the first electrode plate (6) and the second electrode plate (7). A U-shaped bend is provided at the connection between the first electrode plate (6), the second electrode plate (7) and the lithium-ion battery cell body (1).

7. The lithium-ion cell structure with stable wiring according to claim 4, characterized in that: The side of the cover plate (3) is on the same horizontal line as the side of the heat dissipation partition (2), and the top surface of the heat dissipation partition (2) is fixed by the cover plate (3) with modified epoxy resin adhesive.

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