A battery pack architecture

Abstract

This utility model discloses a battery pack architecture, relating to the field of battery pack technology, which improves the problems of large space occupation and low installation efficiency of battery packs. It includes a lower cover, with a battery cell housed in the inner cavity of the lower cover. A bracket is mounted on top of the battery cell, an insulating plate is fixedly mounted on top of the bracket, a BMS board is fixedly mounted on top of the insulating plate, and an upper cover is fixedly mounted on top of the BMS board. An inner protective layer is provided on the inner surface of the lower cover, and an outer protective layer is provided on the outer surface of the lower cover. The inner protective layer includes a high-temperature resistant layer, a waterproof layer, and an anti-corrosion layer. The high-temperature resistant layer is located on the inner surface of the lower cover. This utility model constructs a battery pack by setting up a lower cover, battery cell, bracket, insulating plate, BMS board, and upper cover, which can power electric bicycles. Furthermore, the use of multiple battery cells reduces the number of battery packs required, lowers the space occupied during installation, and improves installation efficiency.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a battery pack architecture. Background Technology

[0002] Electric bicycles are mechatronic personal transportation vehicles that use batteries as auxiliary power and are based on ordinary bicycles. They are equipped with motors, controllers, batteries, throttles, brake levers, and display instrument systems. Electric bicycles generally consist of a charger, battery, controller, throttle, brake levers, power assist sensor, motor, lights, and instrument. Although the battery packs currently used can meet normal usage needs, they still have defects in actual use. For example, the battery packs currently used in electric bicycles often require multiple units to be assembled in series to meet the needs. This method occupies a lot of space, has low installation efficiency, and has a limited lifespan of the bottom cover. Improvements are needed. Therefore, a battery pack architecture is proposed. Utility Model Content

[0003] To address the issues of large space requirements and low installation efficiency during battery pack installation, this utility model provides a battery pack architecture.

[0004] This utility model provides a battery pack architecture, which adopts the following technical solution:

[0005] A battery pack structure includes a lower cover, an inner cavity of which a battery cell is disposed, a bracket is disposed on the top of the battery cell, an insulating plate is fixedly mounted on the top of the bracket, a BMS board is fixedly mounted on the top of the insulating plate, an upper cover is fixedly mounted on the top of the BMS board, an inner protective layer is disposed on the inner surface of the lower cover, and an outer protective layer is disposed on the outer surface of the lower cover.

[0006] By adopting the above technical solution, electric bicycles can be powered. At the same time, the design of multiple battery cells can reduce the number of battery packs used, reduce the space occupied during installation, and improve installation efficiency.

[0007] In one embodiment, the inner protective layer includes a high-temperature resistant layer, a waterproof layer, and an anti-corrosion layer. The high-temperature resistant layer is disposed on the inner surface of the lower cover, the waterproof layer is disposed on the inner surface of the high-temperature resistant layer, and the anti-corrosion layer is disposed on the inner surface of the waterproof layer.

[0008] By adopting the above technical solution, the inner surface of the lower cover can be protected.

[0009] In one embodiment, the outer protective layer includes an explosion-proof layer and a wear-resistant layer, wherein the explosion-proof layer is disposed on the outer surface of the lower cover, and the wear-resistant layer is disposed on the outer surface of the explosion-proof layer.

[0010] By adopting the above technical solution, the outer surface of the lower cover can be protected.

[0011] In one embodiment, a positioning seat is uniformly fixedly connected to the bottom of the inner cavity of the lower cover, and the battery cell is inserted into the inner surface of the positioning seat.

[0012] By adopting the above technical solution, it is convenient to limit the installation of the battery cell.

[0013] In one embodiment, an aluminum plate and a nickel sheet are fixedly mounted on the top of the bracket, and the aluminum plate and the nickel sheet are fixed together by resistance welding.

[0014] In one embodiment, limit blocks are fixedly connected to both sides of the inner cavity of the lower cover, and the bracket is fixedly installed on the top of the limit blocks by screws.

[0015] By adopting the above technical solution, it is convenient to limit the installation of the bracket.

[0016] In one embodiment, the high-temperature resistant layer is a fluorocarbon resin coating, and the waterproof layer is a polyurethane coating.

[0017] In one embodiment, the anti-corrosion layer is an epoxy resin coating, and the high-temperature resistant layer, the waterproof layer, and the anti-corrosion layer have the same thickness.

[0018] In one embodiment, the explosion-proof layer is a barrier explosion-proof film layer, and the wear-resistant layer is a polytetrafluoroethylene coating.

[0019] In one embodiment, the thickness of the explosion-proof layer is 0.6 mm, and the thickness of the wear-resistant layer is 1 mm.

[0020] In summary, this utility model has the following beneficial effects:

[0021] 1. This utility model constructs a battery pack by setting up a lower cover, battery cells, bracket, insulation board, BMS board and upper cover together, which can power electric bicycles. At the same time, the design of multiple battery cells can reduce the number of battery packs used, reduce the space occupied during installation, and improve installation efficiency. By setting an inner protective layer and an outer protective layer, the lower cover can be protected and the service life of the lower cover can be improved.

[0022] 2. This utility model can protect the inner surface of the lower cover by setting an inner protective layer and the outer protective layer by setting an outer protective layer, thereby improving the service life of the lower cover. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2This is a cross-sectional view of the structure of this utility model;

[0025] Figure 3 This is a partial cross-sectional view of the inner protective layer structure of this utility model;

[0026] Figure 4 This is a partial cross-sectional view of the outer protective layer structure of this utility model.

[0027] In the diagram: 1. Lower cover; 2. Battery cell; 3. Bracket; 4. Insulation board; 5. BMS board; 6. Upper cover; 7. Inner protective layer; 701. High temperature resistant layer; 702. Waterproof layer; 703. Anti-corrosion layer; 8. Outer protective layer; 801. Explosion-proof layer; 802. Wear-resistant layer; 9. Positioning seat; 10. Aluminum plate; 11. Nickel sheet; 12. Limiting block. Detailed Implementation

[0028] 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. Example 1:

[0029] Please refer to Figure 1-4 A battery pack structure includes a lower cover 1, a battery cell 2 disposed in the inner cavity of the lower cover 1, a bracket 3 disposed on the top of the battery cell 2, an insulating plate 4 fixedly mounted on the top of the bracket 3, a BMS board 5 fixedly mounted on the top of the insulating plate 4, an upper cover 6 fixedly mounted on the top of the BMS board 5, an inner protective layer 7 disposed on the inner surface of the lower cover 1, and an outer protective layer 8 disposed on the outer surface of the lower cover 1.

[0030] As a further technical optimization of this utility model, a positioning seat 9 is uniformly fixedly connected to the bottom of the inner cavity of the lower cover 1, and the battery cell 2 is inserted into the inner surface of the positioning seat 9.

[0031] As a further technical optimization of this utility model, an aluminum plate 10 and a nickel sheet 11 are fixedly installed on the top of the bracket 3, and the aluminum plate 10 and the nickel sheet 11 are fixed by resistance welding.

[0032] As a further technical optimization of this utility model, the lower cover 1 has two fixed connections on both sides of the inner cavity, and the bracket 3 is fixedly installed on the top of the limit block 12 by screws.

[0033] In this embodiment, a battery pack is constructed by setting a lower cover 1, a battery cell 2, a bracket 3, an insulating plate 4, a BMS plate 5, and an upper cover 6, which can provide power to electric bicycles. At the same time, the design of multiple battery cells 2 can reduce the number of battery packs used, reduce the space occupied during installation, and improve installation efficiency. The positioning seat 9 can limit and fix the battery cell 2, and the limiting block 12 can install and fix the bracket 3. Example 2:

[0034] Reference Figure 2 and Figure 3 The inner protective layer 7 includes a high-temperature resistant layer 701, a waterproof layer 702, and an anti-corrosion layer 703. The high-temperature resistant layer 701 is disposed on the inner surface of the lower cover 1, the waterproof layer 702 is disposed on the inner surface of the high-temperature resistant layer 701, and the anti-corrosion layer 703 is disposed on the inner surface of the waterproof layer 702.

[0035] As a further technical optimization of this utility model, the high-temperature resistant layer 701 is a fluorocarbon resin coating. Fluorocarbon resin has good heat resistance, chemical resistance, cold resistance and low-temperature flexibility. The waterproof layer 702 is a polyurethane coating. Polyurethane has excellent thermal insulation properties, chemical resistance, easy processing and good waterproof performance.

[0036] As a further technical optimization of this utility model, the anti-corrosion layer 703 is an epoxy resin coating. Epoxy resin has excellent chemical resistance, especially alkali resistance, and also has good heat resistance and electrical insulation. The high-temperature resistant layer 701, the waterproof layer 702 and the anti-corrosion layer 703 have the same thickness.

[0037] In this embodiment, an inner protective layer 7 is constructed by setting a high-temperature resistant layer 701, a waterproof layer 702, and an anti-corrosion layer 703, which can protect the inner surface of the lower cover 1 and improve the high-temperature resistance, waterproofness, and anti-corrosion performance of the inner surface of the lower cover 1. Example 3:

[0038] Reference Figure 2 and Figure 4 The outer protective layer 8 includes an explosion-proof layer 801 and a wear-resistant layer 802. The explosion-proof layer 801 is disposed on the outer surface of the lower cover 1, and the wear-resistant layer 802 is disposed on the outer surface of the explosion-proof layer 801.

[0039] As a further technical optimization of this utility model, the explosion-proof layer 801 is a barrier explosion-proof film layer, which has good explosion-proof performance; the wear-resistant layer 802 is a polytetrafluoroethylene coating, which has excellent chemical stability, corrosion resistance, sealing performance, high lubricity and non-stickiness, electrical insulation and good wear resistance.

[0040] As a further technical optimization of this utility model, the thickness of the explosion-proof layer 801 is 0.6mm, and the thickness of the wear-resistant layer 802 is 1mm.

[0041] In this embodiment, an outer protective layer 8 is constructed by setting an explosion-proof layer 801 and a wear-resistant layer 802 together, which can protect the outer surface of the lower cover 1, improve the explosion-proof performance and wear resistance of the outer surface of the lower cover 1, and thus improve the service life of the lower cover 1.

[0042] The implementation principle of this utility model is as follows: In use, firstly, the battery cell 2 is assembled into the positioning seat 9 inside the lower cover 1, then the bracket 3 is assembled into the lower cover 1, and the bracket 3 is fixed to the top of the limiting block 12 with screws, which also serves to fix the battery cell 2. Then, the aluminum plate 4 is assembled into the corresponding marking position of the bracket 3, and the aluminum plate 4 and the battery cell 2 are fixed by laser welding. Then, the nickel sheet 5 is assembled into the corresponding engraved marking position of the aluminum plate 4, and the nickel sheet 5 and the aluminum plate 4 are fixed by resistance welding. The insulating plate 6 is fastened to the top of the bracket 3 for fixation, and the BMS board 7 is fixed to the top of the bracket 3. At this time, the part of the nickel sheet 5 protruding is... The sub-cells are inserted into the holes of the BMS board 7, and then the nickel sheet 5 is directly welded to the BMS board 7 to achieve pressure sampling. This simplifies the cumbersome process of using wire harnesses to connect pressure sampling, reduces costs, and finally closes the upper cover 8 and ultrasonically connects and fixes it to the lower cover 1 to complete the assembly. This method also adopts a design of multiple sets of battery cells 2, which can reduce the number of battery packs used, reduce the space occupied during installation, and improve installation efficiency. The inner protective layer 7 is composed of a high-temperature resistant layer 701, a waterproof layer 702, and an anti-corrosion layer 703, and the outer protective layer 8 is composed of an explosion-proof layer 801 and a wear-resistant layer 802, which increases the service life of the lower cover 1.

[0043] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A battery pack structure, including a lower cover (1), characterized in that: The inner cavity of the lower cover (1) is provided with a battery cell (2), the top of the battery cell (2) is provided with a bracket (3), the top of the bracket (3) is fixedly installed with an insulating plate (4), the top of the insulating plate (4) is fixedly installed with a BMS plate (5), the top of the BMS plate (5) is fixedly installed with an upper cover (6), the inner surface of the lower cover (1) is provided with an inner protective layer (7), and the outer surface of the lower cover (1) is provided with an outer protective layer (8).

2. The battery pack architecture according to claim 1, characterized in that: The inner protective layer (7) includes a high temperature resistant layer (701), a waterproof layer (702) and an anti-corrosion layer (703). The high temperature resistant layer (701) is disposed on the inner surface of the lower cover (1), the waterproof layer (702) is disposed on the inner surface of the high temperature resistant layer (701), and the anti-corrosion layer (703) is disposed on the inner surface of the waterproof layer (702).

3. The battery pack architecture according to claim 1, characterized in that: The outer protective layer (8) includes an explosion-proof layer (801) and a wear-resistant layer (802). The explosion-proof layer (801) is disposed on the outer surface of the lower cover (1), and the wear-resistant layer (802) is disposed on the outer surface of the explosion-proof layer (801).

4. The battery pack architecture according to claim 1, characterized in that: The bottom of the inner cavity of the lower cover (1) is uniformly fixedly connected with a positioning seat (9), and the battery cell (2) is inserted into the inner surface of the positioning seat (9).

5. A battery pack architecture according to claim 1, characterized in that: An aluminum plate (10) and a nickel sheet (11) are fixedly installed on the top of the bracket (3), and the aluminum plate (10) and the nickel sheet (11) are fixed together by resistance welding.

6. A battery pack architecture according to claim 1, characterized in that: Limiting blocks (12) are fixedly connected to both sides of the inner cavity of the lower cover (1), and the bracket (3) is fixedly installed on the top of the limiting block (12) by screws.

7. A battery pack architecture according to claim 2, characterized in that: The high-temperature resistant layer (701) is a fluorocarbon resin coating, and the waterproof layer (702) is a polyurethane coating.

8. A battery pack architecture according to claim 2, characterized in that: The anti-corrosion layer (703) is an epoxy resin coating, and the high-temperature resistant layer (701), the waterproof layer (702), and the anti-corrosion layer (703) have the same thickness.

9. A battery pack architecture according to claim 3, characterized in that: The explosion-proof layer (801) is a barrier explosion-proof film layer, and the wear-resistant layer (802) is a polytetrafluoroethylene coating.

10. A battery pack architecture according to claim 3, characterized in that: The thickness of the explosion-proof layer (801) is 0.6 mm, and the thickness of the wear-resistant layer (802) is 1 mm.

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