Tricycle power pack structure

Abstract

The utility model discloses a power pack structure of a tricycle. The power pack structure comprises a box cover, an insulating column, a pressing strip, foam, a box body, a handle, a connector, a battery cell module and a BMS (Battery Management System), the handles are mounted on the left and right side surfaces of the box body and the top surface of the box cover, the foam is adhered to the inner side of the box body to insulate the inner side of the battery pack, the four groups of battery cell modules are connected in series and are sequentially placed in the box body, the pressing strips are locked on the corresponding battery cell modules, the BMS and the insulating columns are locked on the pressing strips, the connector is mounted on the box body, and the box cover and the box body are fixed by screws. According to the utility model, an early lead-acid battery is replaced by the tricycle power pack of the lithium battery, so that the whole battery has the advantages of lighter weight, higher energy density, higher charging speed, longer service life, better environmental protection performance, stronger temperature adaptability, lower self-discharge rate and the like.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicles, in particular to a power pack structure for a tricycle. Background Art

[0002] In the field of modern logistics, lead-acid battery electric tricycles have become an important tool for urban logistics distribution. Compared with traditional fuel-powered tricycles, lead-acid battery electric tricycles do not require fuel consumption, reduce exhaust emissions, and help improve urban air quality. Electric tricycles have low maintenance costs, reducing operating costs for enterprises and improving economic benefits. However, existing technologies have the following drawbacks:

[0003] It is highly polluting. Its main components, heavy metal lead and sulfuric acid, are very harmful to the environment. Lead accounts for more than 60% of the battery's mass. In addition, it also contains harmful substances such as cadmium compounds.

[0004] Short service life: The chemical reaction mechanism of lead-acid batteries leads to a shortened lifespan. Lead-acid batteries utilize a stable charge and discharge reaction, but this reaction causes chemical changes between the anode and cathode, leading to changes in the electrochemically active materials at the positive and negative electrodes, thus reducing battery performance. Due to their large size, the battery has a low energy density, storing less energy per unit volume, making it less suitable for long-term power supply. Furthermore, lead-acid batteries are relatively heavy, making them unsuitable for use in portable devices. Utility Model Content

[0005] The purpose of this utility model is to provide a tricycle power pack structure to solve the above technical problems.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A tricycle power pack structure includes a box cover, insulating columns, pressure strips, foam, a box body, a handle, a connector, a battery module, and a battery management system (BMS). Handles are installed on the left and right sides of the box body and the top surface of the box cover. The foam is pasted on the inside of the box body to insulate the inside of the battery pack. The four groups of battery modules are placed in series in the box body. The pressure strips are locked to the corresponding battery modules. The BMS and insulating columns are locked to the pressure strips. The connector is installed on the box body. The box cover and the box body are fixed with screws.

[0008] Preferably, the battery cell module includes a connecting piece, fiber tape, battery cell foam, battery cells and epoxy boards. Several battery cells are arranged in sequence with opposite positive and negative polarities, and two battery cell foams are pasted between adjacent battery cells, and the battery cells at both ends are pasted with epoxy boards; the upper and lower sides of several battery cells are wrapped and fixed with fiber tape, the connecting piece is placed on the pole of the battery cell, and the connecting piece and several battery cells are welded into a single battery cell module.

[0009] Preferably, during the process of stacking the battery cells, the battery cell pole surfaces are on the same basis, and the battery cell foam and epoxy board pasting area shall not exceed the four sides of the battery cell.

[0010] Preferably, the box cover, pressure strips and box body are made of 304 stainless steel.

[0011] Preferably, the insulating column is made of BMC.

[0012] Preferably, the foam and battery core foam are made of EVA.

[0013] Preferably, the box cover is made of 304 stainless steel.

[0014] Preferably, the connecting piece is made of aluminum 6061.

[0015] Preferably, the fiber tape is made of PET glass fiber.

[0016] Preferably, the battery cell is a lithium iron phosphate battery cell, a ternary battery cell or a sodium ion square aluminum shell battery cell, and the epoxy board is made of FR4.

[0017] Compared with the existing technology, the utility model has the following advantages: the utility model replaces the early lead-acid battery with a lithium-ion tricycle power pack, which can make the entire battery lighter, have higher energy density, faster charging speed, longer service life, better environmental performance, stronger temperature adaptability and lower self-discharge rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the assembly of the utility model;

[0019] Figure 2 This is a schematic diagram of the assembly of the battery cell module of the present invention. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] A tricycle power pack structure includes a box cover 1, an insulating column 2, a pressure strip 3, foam 4, a box body 5, a handle 6, a connector 7, a battery module 8, and a BMS 9; handles 6 are installed on the left and right sides of the box body 5 and the top surface of the box cover 1, the foam 4 is pasted on the inside of the box body 5 to insulate the inside of the battery pack, the four groups of battery modules 8 are connected in series and placed in the box body 5 in sequence, the pressure strip 3 is locked on the corresponding battery module 8, the BMS 9 and the insulating column 2 are locked on the pressure strip 3, the connector 7 is installed on the box body 5, and the box cover 1 and the box body 5 are fixed with screws.

[0022] The battery cell module 8 includes a connecting piece 10, a fiber tape 11, a battery cell foam 12, a battery cell 13 and an epoxy board 14. Several battery cells 13 are arranged in sequence with opposite positive and negative polarities, and two battery cell foams 12 are pasted between adjacent battery cells, and the battery cells 13 at both ends are pasted with epoxy boards 14; the upper and lower sides of several battery cells 13 are wrapped and fixed with fiber tape 11, and the connecting piece 10 is placed on the pole of the battery cell 13. The connecting piece 10 and several battery cells 13 are welded into a single battery cell module 8.

[0023] During the stacking of the battery cells 13 , the battery cell pole surfaces are on the same basis, and the pasting area of ​​the battery cell foam 12 and the epoxy board 14 must not exceed the four sides of the battery cell 13 .

[0024] The cover 1, bead 3 and box body 5 are made of stainless steel 304. They protect the battery cells and other components from the external environment, and at the same time provide waterproof, dustproof and shockproof functions, and improve the heat dissipation performance of the battery to maintain the stability and safety of the battery pack.

[0025] The insulating column 2 is made of BMC, which helps to improve the structural design of the battery module, reduce the use of connectors, and lower manufacturing costs.

[0026] The foam 4 and the battery core foam 12 are made of EVA, which has heat insulation, cushioning, flame retardancy, sealing, support and shock absorption.

[0027] The connector 7 is used to connect the battery and the device, and also ensures stable and reliable transmission of electric energy.

[0028] The BMS 9 is used to improve the utilization rate of the battery, prevent the battery from being overcharged and over-discharged, extend the service life of the battery, and monitor the status of the battery.

[0029] The box cover 6 is made of stainless steel 304. Its function is to solve the problems existing in the battery transportation process and provide a safer and more comfortable transportation experience.

[0030] The connecting piece 10 is made of aluminum 6061. Its function The battery connecting piece in the battery mainly includes current conduction, stability and reliability, heat dissipation and thermal balance, and safety.

[0031] The fiber tape 11 is made of PET fiberglass. It has strong adhesion, high tensile strength, and good temperature resistance. It leaves no adhesive residue after long-term use, thus ensuring the safety and reliability of the battery.

[0032] The battery cell is a lithium iron phosphate, ternary or sodium ion square aluminum shell battery cell, which stores and releases electrical energy. The quality of the battery cell directly determines the performance of the battery, including endurance, safety and overall performance.

[0033] The epoxy board is made of FR4. Its electrical insulation properties ensure the safety of the battery heat dissipation assembly and prevent potential electrical failures.

[0034] The cell stacking process is as follows Figure 2 As shown:

[0035] Several battery cells 13 are arranged sequentially with opposite positive and negative polarity, ensuring that two strips of foam pads 12 are attached between adjacent cells. During the stacking process, ensure that all cell poles are aligned, and that the areas where foam pads 12 and epoxy sheets 14 are attached do not extend beyond the four edges of the cells 13. After stacking, secure the top and bottom sides with fiber tape 11. Using a welding fixture, place the connector 10 on the cell poles. Using laser welding equipment, weld the connector 10 and the battery cells 13 into a single module 8.

[0036] Battery pack assembly process Figure 1 As shown:

[0037] First, install handle 6 on box 5 and lid 1. Then, affix foam 4 to the inside of box 5 to insulate the battery pack. Place the four modules 8 in the box according to the design requirements, connect them in series, and then install the voltage and temperature acquisition cables. Lock hold-down strips 3 onto the corresponding modules to secure the modules 8 and prevent them from shifting during use. Attach BMS 9 and insulating posts 2 to hold-down strips 3, and install connector 7 on box 5. Secure the low-voltage and high-voltage wiring harnesses within the box and apply torque. Finally, secure lid 1 to box 5 with screws.

[0038] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, based on the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, replacements and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A tricycle power pack structure, characterized in that: It includes a box cover, insulating columns, pressure strips, foam, a box body, a handle, a connector, a battery module, and a BMS. Handles are installed on the left and right sides of the box body and the top surface of the box cover. The foam is pasted on the inside of the box body to insulate the inside of the battery pack. The four groups of battery modules are placed in series in the box body. The pressure strips are locked on the corresponding battery modules. The BMS and the insulating columns are locked on the pressure strips. The connector is installed on the box body. The box cover and the box body are fixed with screws.

2. A tricycle power pack structure as claimed in claim 1, characterized in that: battery cell module It includes connecting pieces, fiber tape, battery foam, battery cells and epoxy boards. Several battery cells are arranged in sequence with opposite positive and negative polarities, and two battery foams are pasted between adjacent battery cells. The battery cells at both ends are pasted with epoxy boards; the upper and lower sides of several battery cells are wrapped and fixed with fiber tape, and the connecting pieces are placed on the poles of the battery cells. The connecting pieces and several battery cells are welded into a single battery cell module.

3. A tricycle power pack structure as claimed in claim 2, characterized in that: During the cell stacking process, the cell pole surfaces must be on the same basis, and the cell foam and epoxy board pasting area must not exceed the four sides of the cell.

4. A tricycle power pack structure as claimed in claim 2, characterized in that: The box cover, pressure strip and box body are made of 304 stainless steel.

5. A tricycle power pack structure as claimed in claim 2, characterized in that: The insulating column is made of BMC.

6. A tricycle power pack structure as claimed in claim 2, characterized in that: The foam and battery core foam are made of EVA.

7. A tricycle power pack structure as claimed in claim 2, characterized in that: The box cover is made of 304 stainless steel.

8. A tricycle power pack structure as claimed in claim 2, characterized in that: The connecting piece is made of aluminum 6061.

9. A tricycle power pack structure as claimed in claim 2, characterized in that: The fiber tape is made of PET glass fiber.

10. A tricycle power pack structure as claimed in claim 2, characterized in that: The battery cell is a lithium iron phosphate square aluminum shell battery cell, and the epoxy board is made of FR4.

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