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Robot battery scheme

time:2018-8-23 15:01:37

With the rapid development of intelligent control technology and sensors, more and more robots are used in various application fields. The application of special robots instead of manual work in special environment is more and more extensive. Our company specializes in the development of intelligent cleaning robot lithium battery for solar photovoltaic power station, with strong environmental weather resistance, low temperature up to - 25 degrees, high temperature up to 65 degrees, can adapt to the Qinghai-Tibet Plateau and other environmental temperature differences. With the characteristics of high energy density, high voltage and high power ratio, the same volume of power can provide the robot with longer working time and adapt to various harsh environments to solve the problem of all-weather continuous work.



I. design requirements for 24V20Ah smart cleaning robot batteries

According to the customer's requirements and specifications, according to local conditions, the design meets the environmental requirements and the host matching battery group. The battery module heating module is added to the design. The device can normally charge and discharge under the condition of more than -25 degrees. It can solve the disadvantage that the ordinary lithium battery is less charged below 0 degrees. The equipment will operate at all weather conditions in extremely harsh environment.

1) electric core modeling requirements: the use of square aluminum shell lithium iron phosphate power battery (LP2770134-8S1P/20Ah/25.6V).

2) structural design requirements: the appearance is exquisite, and the whole battery is waterproof, dust-proof and shockproof. Battery space, 75*145*300mm

3) Circuit design requirements: 24V/20Ah, normal charging current 6A, normal working current 9A, instantaneous maximum working current 15A; Conventional protection function, with equalization circuit, can effectively compensate for the difference between the cell monomers during the use of the battery, maximize the battery life; operating temperature - 25 60 C, low temperature gas It is necessary to heat the battery before heating.



Two, 24V20Ah smart cleaning robot battery design

1) Sheet metal powder spray shell: According to customer requirements, the design of exquisite Sheet metal shell, surface spray powder black treatment, effective protection of the shell from environmental impact and oxidation discoloration. The sealing strip is designed to meet the requirements of waterproof, dust-proof and shockproof. The shell is charged with charging, discharging, temperature sensors and heating four outlet holes. The insulation layer is about 5mm thick insulation material. The outer box is designed with a handle for temporary handling and use, and the upper cover and the panel are flexibly disassembled for battery maintenance.

2) protective plate (PCM):

Protective board design: The scheme selects the BMS with high precision detection as the information acquisition unit of the battery, which has the protection of overcharge, overdischarge, overcurrent, short circuit and high and low temperature, and can balance the voltage and current of a single section.

Heating part design: For the pre-heating before low-temperature charging, we adopt 9 pcs power 5W flexible heating film parallel connection, so that each large plane of the core has heating film, the pre-heating process is completed in about 30 minutes. In order to ensure the heating effect, when the ambient temperature in the battery box reaches 0 C, the customer detects the 0 C signal at the charging end, and then delays heating (10 minutes) to ensure the consistency of the whole temperature of the battery.

3) over current protective sheet (PTC): mainly for two protection function design. PTC can restore the fuse with overcurrent protection, automatic recovery dual function. PTC in battery products can prevent battery from discharging at high temperature and unsafe high current.

4) LP2770134-8S1P/20Ah/25.6V battery pack



Three. 24V20Ah smart cleaning robot battery characteristics:

Long service life (1000 times cycle capacity should be maintained not less than 70%).

Excellent working temperature (stable operation at -20 C to +60 C) for a long time.

_Installing a battery detection unit in the battery pack can accurately and real-time detect the battery voltage, temperature, capacity and other conditions, and timely transmission to the main system through the communication system, which can fully improve the safety of the work of the product;

_Battery pack shell adopts sheet metal material design, excellent impact resistance and high and low temperature resistance, effective flame retardant high performance, can ensure that the battery pack under the impact of external force always maintain effective protection capacity, folding handle outside, easy to carry;

The battery has passed all safety tests of QC/T743-2006 Electric Vehicle Lithium Ion Storage Battery, which conforms to the automotive industry standard of the People's Republic of China and meets all the standards.

Simple installation and combination (unit module design concept, flexible and reliable product installation);



Four. Block diagram of design plan






Battery explosion diagram




Battery explosion diagram



Battery outline drawing


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