High Voltage Lithium Polymer Battery for Portable Use

Abstract

The utility model relates to the field of electrical engineering, in particular to autonomous power sources based on lithium-polymer (Li-Po) cells, and can be used in portable electronic devices, power tools, robotic systems, unmanned aerial vehicles, as well as other equipment requiring a stable source of direct current with increased capacity. The technical result of the utility model consists in increasing the mechanical strength and operational safety. The lithium-polymer High Voltage battery for portable use comprises a soft case in which batteries are placed, connected to each other using polypropylene adhesive tape, has a capacity of 8800-9000 mAh and a nominal voltage of 22.8 V, while the battery pack contains six batteries, the battery pack is equipped with a balancing cable for balancing the batteries and a power cable for charging or powering the consumer. 1 ill.

Description

[0001] The utility model relates to the field of electrical engineering, in particular to autonomous power sources based on lithium-polymer (Li-Po) cells, and can be used in portable electronic devices, electric tools, robotic systems, unmanned aerial vehicles, as well as other equipment requiring a stable DC source with increased capacity.

[0002] The claimed device is a lithium-polymer battery with a 6S2P configuration, a nominal voltage of 22.8 V, and a capacity of 8800-9000 mAh. It can be used to maintain a stable voltage under load. The utility model consists of six batteries housed in a soft case with an exposed balancing connector and power connector.

[0003] Currently, there are similar batteries on the market, but many of them have a number of significant disadvantages:

[0004] - insufficient capacity - limits the battery life of the equipment;

[0005] - low resistance to climatic influences - leads to reduced reliability under extreme operating conditions;

[0006] - lack of standardized documentation - complicates the process of certification and implementation into production;

[0007] - overseas production - dependence on global supply chains and logistics, high transportation costs and delivery times, currency risks and price fluctuations, customs barriers and duties, difficulties with localization and adaptation.

[0008] These problems reduce the efficiency of batteries.

[0009] A prototype device is known: A lithium-polymer battery, including a sealed housing with a lithium-polymer power source installed therein, characterized in that the negative electrodes consist of a current terminal made of copper foil, an active mass made of a binder, graphite and an electrically conductive additive, the positive electrodes consist of a current terminal made of aluminum foil and an active mass made of a binder, the space between the electrodes is filled with an electrolyte, while the same gel-polymer electrolyte is used as the electrolyte and the binding material of the positive and negative electrodes (Patent RU 148290 U1 dated 03 / 31 / 2021, IPC H01M 10 / 052). It has large dimensions and weight compared to the utility model under consideration, which makes it impossible to use it in electronic equipment where the weight and volume of the power source are critical.

[0010] Another drawback of the prototype is that it doesn't provide stable voltage under sustained load, while the advertised model maintains the required voltage level thanks to its 6S2P configuration and increased energy density. As a result, existing solutions must compensate for the voltage drop by increasing the number of batteries, which increases weight and reduces efficiency.

[0011] The purpose of the claimed utility model is to create a compact and energy-intensive battery and, as a result, reduce the dimensions and weight, and increase the power.

[0012] The technical result of the utility model is to increase mechanical strength and operational safety.

[0013] The claimed utility model allows:

[0014] - increase the energy density per unit volume;

[0015] - improve mechanical strength and operational safety;

[0016] - provide convenient connection and charging.

[0017] The above technical result is achieved in that the lithium-polymer High Voltage battery for portable use contains a soft case in which batteries are placed, connected to each other using polypropylene adhesive tape, has a capacity of 8800-9000 mAh and a nominal voltage of 22.8 V, while six batteries are placed in the battery, the battery is equipped with a balancing cable for balancing the batteries and a power cable for charging or powering the consumer.

[0018] The claimed utility model is illustrated by a drawing (Figure 1).

[0019] When manufacturing a lithium-polymer battery in accordance with the proposed utility model, lithium-polymer batteries with a capacity of 9000 mAh and a voltage of 22.8 V are assembled into a battery block, and the batteries (1, Fig. 1) are fixed together in the block using polypropylene adhesive tape.

[0020] The current-carrying parts (terminals) of the batteries are connected in a certain sequence by soldering to the printed circuit board (2, Fig. 1). Next, the balancing (3, Fig. 1) and power (4, Fig. 1) wire assemblies are soldered to the printed circuit board. Polyimide adhesive tape (8, Fig. 1) is glued to the current-carrying parts of the printed circuit board for electrical insulation. Next, an ethylene vinyl acetate gasket (5, Fig. 1) and an electrical cardboard gasket (6, Fig. 1) are placed on the printed circuit board, which are fixed with reinforced adhesive tape (7, Fig. 1). The battery is installed in a housing material made of heat-shrinkable tube (9, Fig. 1) and heat-shrinkage is performed.

[0021] The battery is equipped with:

[0022] - balancing cable for connection to the load (for example, to an electric motor, equipment power supply, controller, etc.);

[0023] - power cable for connection to an external charger that provides current and voltage control.

[0024] The balancing leads are equipped with a standard JST-xH 7pin-F connector, ensuring a reliable connection to the load. The power cable is also equipped with a standard XT90S-F connector.

[0025] Polymer electrolyte is used as electrolyte.

[0026] The design of the utility model provides high current loads (up to 135A) and is compatible with standard 6S LiPo chargers.

[0027] Thus, the design of the utility model gives the following positive effect:

[0028] - Improved reliability: the battery provides at least 100 charge / discharge cycles with a residual capacity of at least 80%, which reduces the frequency of replacement and maintenance costs;

[0029] - energy efficiency: high capacity (8800-9000 mAh) and stable voltage under load increase the battery life of the equipment, reducing the number of required recharges;

[0030] - Compatibility: The use of standard connectors and chargers reduces the cost of additional equipment.

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