Lithium ion battery module for electric forklift truck, and power supply box

A lithium-ion battery and electric forklift technology, applied in the field of lithium-ion batteries, can solve the problems of increased product cost, no box, hidden safety hazards, etc., and achieve the effect of increasing energy density, improving protection, and high protection level

Pending Publication Date: 2021-03-30
ZIBO TORCH ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The entire system structure is not designed with a box, and the structure is open. The battery module, BMS module, and wiring harness are exposed. When impacted or squeezed, there is no protection from the box, and there are certain potential safety hazards.
In terms of thermal management, the forced air cooling design needs to consider factors such as fan installation and power consumption, noise reduction, and additional wiring harness design, but the patent does not introduce the above details
Compared with free cooling, the above design factors will increase the product cost

Method used

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  • Lithium ion battery module for electric forklift truck, and power supply box
  • Lithium ion battery module for electric forklift truck, and power supply box
  • Lithium ion battery module for electric forklift truck, and power supply box

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] Such as Figure 1-3 As shown, the lithium-ion battery module for the electric forklift of the present invention includes a casing and a battery pack in the casing. The end face insulating plate 14, the side insulating plate 15, the bus bar bracket 7 on the top, and the battery cell 11 are square lithium iron phosphate batteries, which are grouped in 1 parallel and 8 strings. The bus bar bracket 7 is provided with the connecting row 4 between the cells 11 and the terminal connecting row 6 , and the shell includes an end plate 8 , a bottom plate 9 , a side plate 10 , and an upper outer cover 2 . The end plate 8 and the side plate 10 are connected by rivets 16, and the bottom plate 9 and the side plate 10 are connected by long dry screws. The end connection row 6 includes the total positive connection row 4 and the total negative connection row 4 with the same structure.

[0068] Such as Figure 6 As shown, the upper and lower edges of the side plate 10 are provided wit...

Embodiment 2

[0083] In order to achieve high structural strength, light weight, and high energy density of the lithium-ion battery module for electric forklifts without weakening the heat dissipation effect, this embodiment is designed on the basis of Embodiment 1: 1) Change the structural design of the end plate 8 and material; 2) Change the material of the plastic parts, that is, the upper outer cover 2, the total positive and negative insulation cover, the bus bar support 7, the bottom insulation plate 13, the end surface insulation plate 14, the side insulation plate 15; 3) Change the structure of the side plate 10 .

[0084] Such as Figure 12 As shown, the difference from Example 1 is that the end plate 8 is made of carbon fiber composite material, taking advantage of its excellent mechanical properties. The end plate 8 is the structure that accounts for the largest weight in the module except for the battery cell 11, and generally accounts for about 5% of the power battery pack, so...

Embodiment 3

[0091] Such as Figure 13-16 As shown, the lithium-ion power supply box for electric forklifts of the present invention includes a box body 34, a high-voltage box 35 and a BMS are arranged in the box body 34, and the lithium-ion battery module 38 for electric forklifts of embodiment 1 or 2 is also included. . There are 6 groups of battery modules 38, symmetrically placed on the left and right sides; the connection mode is 2 parallel and 3 series, the modules on the same side are connected in series, and the modules on both sides are connected in parallel.

[0092] The outer dimensions of the box body 34 can be 1127mm in length, 669mm in width and 686mm in height. The material is Q235a carbon steel, the thickness of the bottom is 176mm, the thickness of the surrounding plates is 16mm, and the thickness of the cover plate is 5mm. In order to increase the counterweight, there is a cavity at the bottom of the box body 34, which is filled with steel plates and compacted as a count...

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Abstract

A lithium ion battery module for an electric forklift truck, and a power supply box, which belong to the technical field of lithium ion batteries. The battery module comprises a housing and a batterypack in the housing; the battery pack comprises cells (11), an inter-cell heat insulation sheet (12), and a bottom surface insulating plate (13), a side surface insulating plate (15) and an end surface insulating plate (14) which are at the periphery of the cells (11), and a bus bar support (7) at the top; the cells (11) are square lithium iron phosphate batteries, and are grouped in a mode with each parallel branch having eight cells which are connected in series, a protruding spacer (18) is provided on the surface of the side surface insulating plate (15) and the surface of the bottom surface insulating plate (13), and the bus bar support (7) is provided with an inter-cell (11) connection bar (4) and an end connection bar (6). The power supply box comprises a box body (34), the box body(34) is internally provided with a high-voltage box (35), a BMS and the described lithium ion battery module for an electric forklift truck, a box cover (39) is provided on the box body (34), and an exhaust valve (50) is provided on the box cover (39). The lithium ion battery module and the power supply box both have high reliability in terms of structure and thermal performance.

Description

technical field [0001] The invention relates to a lithium-ion battery module and a power box for an electric forklift, belonging to the technical field of lithium-ion batteries. Background technique [0002] According to the global electric forklift industry market analysis and forecast for 2018-2023, the output of electric forklifts in 2017 is estimated to be 2766.99 thousand units, and is expected to reach 4097.06 thousand units by the end of 2023, with a CAGR of 6.6% from 2018 to 2023. Persistence Market Research (hereinafter referred to as PMR), the world's third largest research institution platform, published a report entitled "Global Market Research on Forklifts: Asia-Pacific Region Will Witness the Highest Growth in 2021" in 2014. The survey results show that the global The forklift market was valued at USD 35.3 billion, and the electric forklift market was then expected to grow at a compound annual growth rate (CAGR) of 6.9% over the forecast period to reach USD 55....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M50/209H01M50/244H01M50/249H01M50/258H01M50/233H01M50/236H01M50/24H01M10/613H01M10/625H01M10/617H01M10/658H01M10/0525B66F9/20
CPCH01M10/613H01M10/625H01M10/617H01M10/658H01M10/0525B66F9/20H01M50/209H01M50/244H01M50/249H01M50/258H01M50/233H01M50/236H01M50/24Y02E60/10
Inventor 吴涛贺中捷冷枫丁广波王元李开元唐胜群张梦颖张秀萍阎中超
Owner ZIBO TORCH ENERGY
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