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46.8V 44.8AH AGV lithium truck solutions

Writer: TOPAKRelease time: 2020-06-15Page View: 546

One、Background of the case ：

With the advent of Industry 4.0, the manufacturing industry has started the automation reform, and the logistics industry which is closely related to the manufacturing industry is also like this. In recent years, the term “unmanned transportation” appears more and more often in the logistics industry, and the appearance of AGV forklift makes the logistics automation technology make a leaping progress. At the same time, the appearance of AGV forklift is also a collision of knowledge and technology for the traditional forklift; in this stage of replacement of traditional forklift and AGV intelligent forklift, a company in April 2019 asked our company to assist in developing an AGV vehicle power battery pack, which is a structure shaped and cleverly designed power smart battery pack; the project has now been delivered in bulk.

Two、Product functions and main features

●Overcharge, overdischarge, overcurrent, short-circuit, overtemperature, data reading function.
●Highly integrated analog front-end
●Isolated power supply circuits
●Charge balancing function
●CAN communication
●Adjustable parameter settings
●Short circuit protection function
●Integrated serial ICs
●High voltage accuracy (≤20mV)
High current accuracy (≤2%@FS)
●SOC estimation function
●Low power consumption
●SOH estimation function
●Recording of data exceptions

Three、Introduction to the overall programme
1. Cell parameters: using a brand imported 18650/3200mAh/3.6V battery cell rate
2. Finished product specifications：TOPAK 18650-13S14-44.8Ah-46.8V
3. Protection board: The parameters and schematic diagram of the intelligent protection board (RS485\CAN protocol) are as follows.??????????????????????????????????????????????????? 4.Other materials: fireproof epoxy resin version, insulation PET and other materials to isolate the welding point and between the cores.
5. Assembly process: 2 modules of 18650-6S14P and 18650-7S14P are combined, with internal support bracket and ventilation holes on the surface of the shell, which has heat dissipation effect.
6. Special copper sheet: Nickel sheet for battery connection is made of nickel-to-copper material, and each cell is connected in series and parallel through the nickel sheet. It has good welding effect, firm welding, not easy to solder off and even heat dissipation when the battery has high current and good current conductivity.

Protection parameters：

NO.	Indicator projects		Factory default parameters	Is it possible to set	Note
1	Single overcharge protection	Single overcharge alarm voltage	4150mV	assignable
		Monomer overcharge protection voltage	4250mV	assignable
		Single overcharge protection delay	1S	assignable
	Single Overvoltage Protection Release	Single overcharge protection deactivation voltage	4100mV	assignable
	Single Overvoltage Protection Release	Discharged.	Discharge current > 1A
2	Single overdischarge protection	Single Overdischarge Alarm Voltage	3000mV	assignable	If the overdischarge protection fails to recover after 60 seconds, it will enter the low-power mode.
		Monoblock overdischarge protection voltage	2800mV	assignable
		Single overdischarge protection delay	1S	assignable
	Single overdischarge protection release	Single Overdischarge Protection Deactivation Voltage	3200mV	assignable
	Single overdischarge protection release	Release when charging.	Charging current >1A
3	Overall overcharge protection	Overall overcharge alarm voltage	53.95V	assignable
		Overall overcharge protection voltage	55.25V	assignable
		Overall overcharge protection delay	1S	assignable
	Overall overvoltage protection release	Overall Overcharge Protection Deactivation Voltage	53.3V	assignable
	Overall overvoltage protection release	Discharged	Discharge current > 1A
4	Total overdischarge protection	Overall Overdischarge Alarm Voltage	39V	assignable	If the overdischarge protection fails to recover after 60 seconds, it will enter the low-power mode.
		Overall overdischarge protection voltage	36.4V	assignable
		Total overdischarge protection delay	2S	assignable
	Total Overdischarge Protection Release	Overall Overdischarge Protection Discharge Voltage	41.6V	assignable
	Total Overdischarge Protection Release	Release when charging.	Charging current >1A
5	Charge overcurrent protection	Charging overcurrent alarm current	10A	assignable
		Charging overcurrent protection current	30A	assignable
		Charge overcurrent protection delay	1.0S	assignable
	Charging overcurrent protection disengaged	automatic release	Charger Disconnect
	Charging overcurrent protection disengaged	Discharged	Discharge current > 1A
6	Discharge overcurrent 1 protection	Discharge overcurrent 1 alarm current	>80A	assignable
		Discharge overcurrent 1 protection current	>100A	assignable
		Discharge overcurrent 1 protection delay	1.0S	assignable
	Discharge overcurrent 1 protection disabled	automatic release	Load Break
	Discharge overcurrent 1 protection disabled	Charging release	Charging current > 1A
7	Discharge overcurrent 2	Discharge overcurrent 2 protection current	>150A	assignable
	Discharge overcurrent 2	Discharge overcurrent 2 protection delay	100mS	assignable
	Discharge overcurrent 2 protection disabled	automatic release	Load Break
	Discharge overcurrent 2 protection disabled	Charging release	Charging current > 1A
8	short circuit protection	Short-circuit protection current	≥200A
		Short-circuit protection delay	≤300μS
		automatic release	Charging current >1A
		automatic release	Load removal
9	MOS? High temperature protection	MOS Over-temperature alarm temperature	80℃	assignable
		MOS Over-temperature protection temperature	110℃	assignable
		MOS Protecting the disarm temperature	60℃	assignable
10	Cell temperature protection	Low temperature alarm temperature	3℃±3℃	assignable
		High temperature alarm temperature	55℃±3℃	assignable
		Charging low temperature protection temperature	0℃±3℃	assignable
		Charge low-temperature protection release temperature	5℃±3℃	assignable
		Charging high temperature protection temperature	65℃±5℃	assignable
		Charging High Temperature Protection Disarming Temperature	48℃±10℃	assignable
		Discharge low temperature protection temperature	-20℃±3℃	assignable
		Discharged low-temperature protection release temperature	-10℃±3℃	assignable
		Discharge high temperature protection temperature	65℃±5℃	assignable
		Discharge High Temperature Protection Discharge Temperature	48℃±10℃	assignable
11	Environmental temperature protection	Ambient low temperature alarm temperature	-20℃	assignable
		Ambient low temperature protection temperature	-25℃	assignable
		Environmental cryoprotection release temperature	-15℃	assignable
		Environmental high temperature alarm temperature	50℃	assignable
		Environmental high temperature protection temperature	65℃	assignable
		Environmental high temperature protection deactivation temperature	60℃	assignable
12	Current consumption	Operating Current	≤10mA
		Sleeping Current	<250 uA
		Low power mode current	≤20μA
13	Balance of functions	Equalization of turn-on voltage	4200mV	assignable
13	Balance of functions	Turn on the differential pressure	30mV	assignable
14	logbook	Recording conditions	Important information	automate
15	Capacity charging learning	opening conditions	Battery over discharge alarm or protection	automate
16	Volumetric discharge learning	opening conditions	Battery overcharge	automate
17	Factory setting	Date of Manufacture		assignable
17	Factory setting	Battery initial use time	Charge/discharge learning setup	automate
18	Capacity default setting	Full capacity setting		automate
18	Capacity default setting	Design capacity setting	10AH	assignable

Protection block diagram ：