12.8v lithium iron phosphate battery supporting wide voltage charging

Abstract

The utility model provides a kind of 12.8V lithium iron phosphate battery of supporting wide voltage charging, belong to battery pack technical field, the battery pack aims at solving the problem that existing battery charging voltage adaptation range is narrow, cannot effectively charge when charging source voltage is unstable, it is constituted by battery shell, battery cover, voltage output terminal, charging input terminal, positive and negative pole schematic mark, charging switch, electric core and intelligent charging conversion circuit etc., multiple electric cores in battery pack are connected in series, compatible with multiple charging power supply, charging input terminal is fixed with M5 screw, wiring is flexible, battery shell and battery pack are filled with heat-conducting glue and partition, beneficial to heat dissipation and fixed, this battery pack can provide stable, safe, durable 12V direct current power support for outdoor operation, emergency standby power, mobile device.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a 12.8V lithium iron phosphate battery pack that supports wide voltage charging. Background Technology

[0002] In scenarios such as outdoor operations, emergency backup power, and mobile device power supply, the stability and reliability of 12V DC power supply directly affect operational efficiency and emergency response effectiveness. Lithium iron phosphate batteries, due to their long cycle life and excellent safety performance, are widely used in energy storage devices for these scenarios.

[0003] Currently, charging for batteries used in outdoor operations or power supply mainly relies on vehicle power supplies, solar panels, generators, etc. Since these are all step-down charging methods (where the input charging voltage must be higher than the battery voltage to charge), when the voltage of the charging source itself is unstable, it cannot charge the battery stably and effectively. Alternatively, traditional batteries must be charged with a charger of the rated charging voltage, and there is a problem of not being able to find a suitable charger outdoors. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies where the input charging voltage must be higher than the battery voltage for charging to occur, and where the charging source itself cannot stably and effectively charge the battery when the voltage is unstable. Therefore, this invention proposes a 12.8V lithium iron phosphate battery pack that supports wide voltage charging.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A 12.8V lithium iron phosphate battery pack supporting wide voltage charging includes a battery casing, a battery cover fixed to the top of the battery casing for sealing the battery casing, a battery pack for energy storage inside the battery casing, and a filling part between the battery casing and the battery pack for buffering, fixing and heat dissipation protection of the battery pack. The battery cover has four accommodating gaps at its top corners. Two voltage output terminals for discharging and two charging input terminals for charging are fixed in the four accommodating gaps respectively. A charging switch is fixed at the top of the battery cover. The battery housing has an intelligent charging conversion circuit that is electrically connected to the two charging input terminals. The intelligent charging conversion circuit is electrically connected to the charging switch. The charging switch is electrically connected to the battery pack.

[0006] In one possible design, positive and negative polarity indicators are fixed on both sides of the top of the battery cover. The two positive and negative polarity indicators show the positive and negative poles respectively, and the positive and negative poles of the two voltage output terminals and the two charging input terminals are located on both sides of the corresponding positive and negative poles of the two positive and negative polarity indicators.

[0007] In one possible design, both of the charging input terminals are secured within the two receiving gaps by M5 screws; The two charging input terminals are fixed with M5 screws, which can accommodate various wiring methods. The charging switch is turned on when charging and turned off when not charging.

[0008] In one possible design, the filling portion includes thermally conductive adhesive and four separators located at the four ends of the battery pack. A filling gap is formed between the inner wall of the battery casing and the four separators, and the thermally conductive adhesive fills the gap.

[0009] In one possible design, a balancing protection plate is fixed to the side of one of the separators, and the battery pack includes multiple cells. The balancing protection plate and the battery pack are electrically connected to balance the voltage of the multiple cells.

[0010] In one possible design, anti-slip bases are fixed at the four corners of the bottom of the battery casing.

[0011] Beneficial effects: The 12.8V lithium iron phosphate battery pack that supports wide voltage charging in this utility model can adapt to a wide range of charging voltages by setting up an intelligent charging conversion circuit. It is compatible with various charging power sources such as mains power, generators, and solar panels, effectively solving the problem of narrow charging voltage adaptation range of existing battery packs and improving the applicability of the battery pack in different scenarios such as outdoor operation and emergency backup power. In this utility model, the 12.8V lithium iron phosphate battery pack that supports wide voltage charging has its charging input terminal fixed with an M5 screw, which can be adapted to various wiring methods such as bolt connection and welding, improving the wiring flexibility, meeting the wiring needs of different usage environments and users, and lowering the threshold for use.

[0012] This device is a 12.8V lithium iron phosphate battery pack that supports wide voltage charging. It is a high-performance energy storage solution designed for complex power environments. It adopts advanced wide voltage adaptive charging technology (supports 9V-32V DC input), which is perfectly compatible with vehicle power supplies, solar panels, generators and other scenarios with unstable output voltage. At the same time, it has multiple safety protection mechanisms such as built-in input low voltage protection threshold (configurable) and constant current and constant voltage threshold (configurable), providing stable, safe and long-lasting 12V DC power support for outdoor operations, emergency backup power and mobile devices. Attached Figure Description

[0013] Figure 1 This is a front perspective perspective view of a 12.8V lithium iron phosphate battery pack that supports wide voltage charging, as proposed in this utility model. Figure 2A partial explosion diagram illustrating a 12.8V lithium iron phosphate battery pack supporting wide voltage charging proposed in this utility model; Figure 3 The flowchart of a 12.8V lithium iron phosphate battery pack that supports wide voltage charging proposed in this utility model is shown.

[0014] In the diagram: 1. Battery casing; 2. Battery cover; 3. Voltage output terminal; 4. Charging input terminal; 5. Positive and negative polarity indicators; 6. Charging switch; 7. Battery cell; 8. Balance protection board; 9. Intelligent charging conversion circuit; 10. Anti-slip base. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] In one embodiment: Refer to Figures 1-3 A 12.8V lithium iron phosphate battery pack that supports wide voltage charging is used in the field of battery pack technology. It includes a battery casing 1, a battery cover 2, a voltage output terminal 3, a charging input terminal 4, positive and negative polarity indicators 5, a charging switch 6, a battery cell 7, a separator, and an intelligent charging conversion circuit 9.

[0017] The battery casing 1 is a rectangular hollow structure, and its top end is fixedly connected to the battery cover 2 by bolts to achieve a sealed protection for the inside of the battery casing 1. The battery casing 1 contains a battery pack for energy storage. The battery pack consists of multiple cells 7 connected in series to form a rated voltage of 12.8V. A filling part is provided between the battery casing 1 and the battery pack. The filling part includes thermally conductive adhesive and four separators. The four separators are respectively attached to the four ends of the battery pack and are in close contact with the battery pack. An annular filling gap is formed between the inner wall of the battery casing 1 and the four separators. The thermally conductive adhesive is uniformly filled in the filling gap. The thermally conductive adhesive is a high-temperature resistant silicone thermally conductive adhesive with excellent insulation properties. It can not only buffer and fix the battery pack, but also conduct the heat generated by the cells 7 during operation to the battery casing 1, and dissipate it to the outside through the battery casing 1.

[0018] One of the separators has a balance protection plate 8 fixed to its side by screws. The balance protection plate 8 is electrically connected to the battery pack and can balance and adjust the voltage of multiple cells 7 to ensure that the voltage of each cell 7 is consistent, thereby improving the charging and discharging performance and service life of the battery pack. The intelligent charging conversion circuit 9 is electrically connected to a dedicated control chip, such as an MCU (Microcontroller Unit), which is also electrically connected to the charging switch 6 and the battery cells 7 of the battery pack. The intelligent charging conversion circuit 9 is electrically connected to the charging switch 6, and the charging switch 6 is electrically connected to the battery pack. The control chip receives the input voltage signal and the battery cell 7 voltage signal from the intelligent charging conversion circuit 9, enabling programmable settings for the input low-voltage protection threshold and the constant current / constant voltage threshold. By controlling the voltage conversion parameters of the intelligent charging conversion circuit 9, it achieves wide voltage input adaptation and voltage balance adjustment among multiple battery cells 7, while simultaneously controlling the on / off state of the charging switch 6 to ensure safe control of the charging circuit.

[0019] The battery cover 2 has four accommodating gaps at its top corners, which are symmetrically distributed. Two voltage output terminals 3 and two charging input terminals 4 are fixed in the four accommodating gaps respectively. The two voltage output terminals 3 are used for external discharge, and the two charging input terminals 4 are used for connecting to the charging power supply. The two charging input terminals 4 are fixed in the corresponding accommodating gaps by M5 screws. The M5 screw fixing method can be adapted to various wiring methods such as bolt connection and welding, which improves wiring flexibility.

[0020] Both sides of the top of the battery cover 2 are fixed with positive and negative polarity indicators 5. The two positive and negative polarity indicators 5 are marked with "+" and "-" symbols respectively to indicate the positive and negative polarities. The positive and negative polarities of the two voltage output terminals 3 and the two charging input terminals 4 are located on both sides of the corresponding positive and negative polarity indicators 5. That is, the two sides of the positive and negative polarity indicators 5 marked with "+" are the positive terminals of voltage output terminal 3 and charging input terminal 4, respectively, and the two sides of the positive and negative polarity indicators 5 marked with "-" are the negative terminals of voltage output terminal 3 and charging input terminal 4, respectively. This makes it easy for users to quickly identify the wiring polarity and avoid reverse connection.

[0021] In another embodiment: Reference Figures 1-3 A 12.8V lithium iron phosphate battery pack supporting wide voltage charging is described. This embodiment has a structure basically the same as the previous embodiments, except that a charging switch 6 is fixed to the top of the battery cover 2. The charging switch 6 is a rocker switch, with its input terminal electrically connected to the intelligent charging conversion circuit 9 and its output terminal electrically connected to the battery pack. The input terminal of the intelligent charging conversion circuit 9 is electrically connected to two charging input terminals 4, realizing series connection between the charging power supply, the intelligent charging conversion circuit 9, the charging switch 6, and the battery pack. During use, the charging switch 6 is turned on for charging, and the charging power supply is connected through the charging input terminals 4. After voltage adjustment and adaptation by the intelligent charging conversion circuit 9, the battery pack is charged. When not charging, the charging switch 6 is turned off to cut off the charging circuit and prevent accidental charging or leakage.

[0022] Anti-slip bases 10 are fixed at the four corners of the bottom of the battery casing 1. The support feet are made of rubber, which has good anti-slip and cushioning performance, which can reduce the collision damage between the battery pack and the ground when it is placed, and at the same time improve the stability of the battery pack when it is placed on uneven ground.

[0023] The working process is as follows: During charging, according to the markings on the positive and negative terminals 5, connect the positive and negative terminals of the external charging power supply to the positive and negative terminals of the two charging input terminals 4 respectively. Turn on the charging switch 6, and the charging power enters the intelligent charging conversion circuit 9. The intelligent charging conversion circuit 9 adjusts the input voltage, converting a wide range of input voltages into a charging voltage suitable for the battery pack. At the same time, it balances the voltage of multiple battery cells 7 to ensure uniform and stable charging. After charging is completed, turn off the charging switch 6 and disconnect the charging power supply. During discharging, connect the connection cable of the external electrical device to the two voltage output terminals 3. The battery pack provides 12V DC power to the electrical device through the voltage output terminals 3.

[0024] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0025] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A 12.8V lithium iron phosphate battery pack supporting wide voltage charging, used to provide stable, safe, and long-lasting 12V DC power support for outdoor operations, emergency backup power, and mobile devices, characterized in that, include: A battery housing (1) is provided with a battery cover (2) fixed at the top of the battery housing (1) for sealing the battery housing (1). A battery pack for energy storage is provided inside the battery housing (1). A filling part is provided between the battery housing (1) and the battery pack. The filling part is used for buffering, fixing and heat dissipation protection of the battery pack. The battery cover (2) has four accommodating gaps at the top corners. Two voltage output terminals (3) for discharging and two charging input terminals (4) for charging are fixed in the four accommodating gaps respectively. A charging switch (6) is fixed at the top of the battery cover (2). The battery housing (1) is provided with an intelligent charging conversion circuit (9) that is electrically connected to the two charging input terminals (4). The intelligent charging conversion circuit (9) is electrically connected to the charging switch (6). The charging switch (6) is electrically connected to the battery pack.

2. A 12.8V lithium iron phosphate battery pack supporting wide voltage charging according to claim 1, characterized in that, The battery cover (2) has positive and negative polarity indicators (5) fixed on both sides of its top. The two positive and negative polarity indicators (5) show the positive and negative poles respectively. The positive and negative poles of the two voltage output terminals (3) and the two charging input terminals (4) are located on both sides of the positive and negative poles corresponding to the two positive and negative polarity indicators (5).

3. A 12.8V lithium iron phosphate battery pack supporting wide voltage charging according to claim 2, characterized in that, Both charging input terminals (4) are fixed in the two receiving gaps by M5 screws; Among them, the two charging input terminals (4) are fixed with M5 screws, which can adapt to various wiring methods. The charging switch (6) is turned on when charging and turned off when not charging.

4. A 12.8V lithium iron phosphate battery pack supporting wide voltage charging according to claim 1, characterized in that, The filling part includes thermally conductive adhesive and four separators. The four separators are located at the four ends of the battery pack. A filling gap is formed between the inner wall of the battery casing (1) and the four separators. The thermally conductive adhesive fills the gap.

5. A 12.8V lithium iron phosphate battery pack supporting wide voltage charging according to claim 4, characterized in that, One of the separators is fixed to a side end with a balancing protection plate (8). The battery pack includes multiple cells (7). The balancing protection plate (8) and the battery pack are electrically connected to balance the voltage of the multiple cells (7).

6. A 12.8V lithium iron phosphate battery pack supporting wide voltage charging according to claim 1, characterized in that, Anti-slip bases (10) are fixed at the four corners of the bottom of the battery casing (1).

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