High-voltage battery manager with double batteries connected in parallel

Abstract

The high-voltage battery manager comprises a protection plate, a power plate and a control plate, a sampling chip, a power supply chip and a connector are welded at the top of the control plate, a heat conduction pad is placed at the top of the power plate, the protection plate and the power plate are placed at the top of the control plate in an overlapped mode, and the power plate is connected with the control plate. Splicing holes are formed in the four corners and the middle of the power board, hexagonal copper columns are arranged on the inner sides of the splicing holes, the control board is fixedly connected with the power board through pin headers, and an insulating film is placed on the top of the control board. According to the utility model, the double-battery parallel connection function is adopted, the battery capacity is increased, when one battery quits working due to undervoltage, the other battery can continue to supply power, the reliability and continuity of the system are improved, and the batteries with higher power consumption are preferentially used, so that the over-discharge can be avoided, and the service life of the batteries is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of battery management systems, in particular to a high-voltage battery manager with two batteries connected in parallel. Background Art

[0002] Conventional BMS 48V systems have limited energy density and may not be suitable for applications that require high energy output, such as high-performance electric vehicles. In applications that require high power output, the 48V system is not as good as a higher voltage system because it provides lower power. Although the 48V system charges relatively quickly, in some cases, it may still take a long time to charge, especially when the charger is power-limited, for example;

[0003] 1. For applications that require higher power output, the 48V system is not as good as higher voltage systems. In electric vehicles, the 48V system may not provide enough power for rapid acceleration.

[0004] 2. The energy density of 8V systems is generally lower than that of high-voltage systems, which means that a 48V system may not be able to store the same amount of energy as a higher voltage system in the same volume or weight.

[0005] 3. Due to the lower voltage of the 48V system, it may take longer to charge, especially when the charger is power-limited. Utility Model Content

[0006] The purpose of the present invention is to provide a high-voltage battery manager with dual parallel batteries to solve the problems proposed in the above background art that a 48V system may not be able to store the same amount of energy as a higher voltage system, and that a 48V system is inferior to a higher voltage system in applications requiring higher power output, and that a dual parallel battery function is adopted.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-voltage battery manager with two batteries connected in parallel, comprising a protection board, a power board and a control board, wherein a sampling chip, a power chip and a connector are welded on the top of the control board, a thermal pad is placed on the top of the power board, the protection board and the power board are overlapped and placed on the top of the control board, splicing holes are opened at the four corners and the middle position of the power board, and a hexagonal copper column is provided on the inner side of the splicing hole, the control board is connected and fixed to the power board through a pin header, an insulating film is placed on the top of the control board, connection holes are opened at the four corners and the middle position of the control board, and screws are provided on the inner side of the connection holes, and five groups of the screws are respectively connected and fixed to the insulating film and the power board.

[0008] Preferably, the screws are connected to the hexagonal copper columns to fix the solar panels.

[0009] Preferably, the protection plate is an I-shaped structure, and a through opening is opened on one side of the I-shaped structure to facilitate structural combination and connection.

[0010] Preferably, the five groups of hexagonal copper pillars are interconnected with the protection board, and the five groups of screws pass through the insulating film and the power board and are interconnected with the hexagonal copper pillars to fix the combined circuit board and improve the firmness between the boards.

[0011] Preferably, the thermal pad is placed on the resistor on top of the power board and connected and fixed to enhance the heat conduction efficiency.

[0012] Preferably, the splicing hole on the power board is adapted to the upper end of the hexagonal copper column.

[0013] The utility model proposes a high-voltage battery manager with two batteries connected in parallel, which has at least the following beneficial effects:

[0014] 1. The dual-battery parallel function is used to increase battery capacity. When one battery stops working due to undervoltage, the other battery can continue to supply power, which improves the reliability and continuity of the system. By giving priority to the battery with higher power, over-discharge can be avoided, thereby extending the battery life.

[0015] During the discharge process, when the remaining power of the two battery groups is basically the same, the second battery is enabled to output. This can use the two batteries more evenly and avoid one battery from being over-discharged while the other battery has too much power remaining.

[0016] Under different environmental conditions, the system can dynamically adjust the charging and discharging strategies according to the actual state of the battery, adapt to different usage scenarios and needs, and maintain battery performance.

[0017] 2. High voltage 60V can provide higher power output, which may bring better acceleration performance and climbing ability. The 60V system may provide longer driving range with the same battery capacity as 48V. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional exploded view of the utility model;

[0019] Figure 2 This is the first stereogram of the present utility model;

[0020] Figure 3 This is a second perspective view of the present invention;

[0021] Figure 4 It is a top view of the utility model;

[0022] Figure 5 It is a side view of the present utility model.

[0023] In the figure: 1, the protection plate; 2, the heat-conducting pad; 3, the power plate; 4, the hexagonal copper column; 5, the control plate; 6, the insulating film; 7, the screw; 8, the sampling chip; 9, the power supply chip; 10, the connector. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0025] Please refer to Figure 1-5 The utility model provides an embodiment: a high voltage battery manager of double battery parallel connection, including protection plate 1 and power plate 3 with control plate 5, the top welding of control plate 5 has sampling chip 8, power supply chip 9 and connector 10, the protection plate is I type structure, and the one side of I type structure is equipped with the passageway, and it is convenient for structural splicing combination;

[0026] The top of power plate 3 places heat-conducting pad 2, protection plate 1 and power plate 3 overlap and place in the top of control plate 5, and the four corners and the middle position of power plate 3 are equipped with splicing hole, and the inner side of splicing hole is equipped with hexagonal copper column 4, and control plate 5 is connected and fixed with power plate 3 through the row pin, and the top of control plate 5 places insulating film 6, and the four corners and the middle position of control plate 5 are equipped with connecting hole, and the inner side of connecting hole is equipped with screw 7, and five groups of screw 7 are connected and fixed with insulating film 6 and power plate 3, and the model of screw 7 is M3 screw, and screw 7 is connected and fixed with hexagonal copper column 4, and it is convenient to utilize the connection of screw structure to fix the battery plate, and heat-conducting pad 2 is placed on the resistance on the top of power plate 3 and is connected and fixed, and the heat conduction efficiency is strengthened;

[0027] Five groups of hexagonal copper column 4 are connected with protection plate 1, and five groups of screw 7 pass through insulating film 6 and power plate 3 and are connected with hexagonal copper column 4, and the fixed circuit board is combined, and the firmness between the plate bodies is improved, and the splicing hole on power plate 3 is adapted to the upper end of hexagonal copper column 4.

[0028] In embodiment 1, the protection plate 1, the power plate 3 and the control plate 5 are all composed of 19S voltage series, and the AFE sampling chip 8 can process the voltage sampling signal from the 19S battery, and the power supply chip 9 is responsible for controlling the charging current and voltage, so that the battery is prevented from overcharging and overdischarging.

[0029] The embodiment 2 is connected with the power board 3 by welding the 2*13 connector 10 on the top of the control board 5, which makes the board body tightly connected.

[0030] Working principle: the high-voltage battery manager in parallel with two batteries,

[0031] The sampling voltage string number is increased to 19, so that the sampling chip 8 can process the voltage sampling signal from the 19 battery strings, and the power chip 9 is responsible for controlling the charging current and voltage, protecting the battery from overcharging and overdischarging, and the 60V voltage is supplied to the CPU through the 2*13 connector 10, the sampling chip 8 and the power chip 9, so that the CPU calculates the current and voltage to control the charging and discharging.

[0032] The CAN controller and CAN communication protocol are used to detect the battery capacity, when two batteries are connected for discharging at the same time, the two batteries judge their respective states through communication, and the battery with higher capacity is used preferentially, when the SOC of the two batteries is basically the same, and the total battery group voltage is basically the same, the second battery is enabled to output, when one group of battery exits the work due to undervoltage, the second group of battery continues to discharge until the discharge is completed and the work is exited; when two batteries are connected for charging at the same time, the two batteries judge their respective states through communication, and the battery with lower capacity is charged first, when the SOC of the two batteries is basically the same, and the total battery group voltage is basically the same, the second battery is enabled to output, and the two batteries are charged at the same time; when one of the two batteries is charged, the charging is automatically exited, and the second battery is continuously charged until the battery is fully charged, and the charger works according to the highest demand voltage and current instruction.

[0033] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims.

[0034] In the description of this utility model, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connected" should be understood in a broad sense. For example, they can refer to fixed or detachable connections, mechanical or electrical connections, and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A high-voltage battery manager with two batteries connected in parallel, characterized by: The invention comprises a protection plate (1), a power plate (3) and a control plate (5), wherein a sampling chip (8), a power chip (9) and a connector (10) are welded on the top of the control plate (5), a thermal pad (2) is placed on the top of the power plate (3), the protection plate (1) and the power plate (3) are overlapped and placed on the top of the control plate (5), splicing holes are opened at the four corners and the middle position of the power plate (3), and a hexagonal copper column (4) is provided on the inner side of the splicing hole, the control plate (5) is connected and fixed to the power plate (3) through a pin row, an insulating film (6) is placed on the top of the control plate (5), connection holes are opened at the four corners and the middle position of the control plate (5), and screws (7) are sleeved on the inner side of the connection holes, and five groups of the screws (7) are respectively connected and fixed to the insulating film (6) and the power plate (3).

2. The high-voltage battery manager with two batteries connected in parallel according to claim 1, characterized in that: The screw (7) is connected to the hexagonal copper column (4).

3. The high-voltage battery manager with two batteries connected in parallel according to claim 1, characterized in that: The protection plate (1) is an I-shaped structure, and a through opening is provided on one side of the I-shaped structure.

4. The high-voltage battery manager with two batteries connected in parallel according to claim 1, characterized in that: The five groups of hexagonal copper pillars (4) are connected to the protection plate (1), and the five groups of screws pass through the insulating film (6) and the power plate (3) and are connected to the hexagonal copper pillars (4).

5. The high-voltage battery manager with two batteries connected in parallel according to claim 1, characterized in that: The thermal pad (2) is placed on the resistor on top of the power board (3) and is connected and fixed.

6. The high-voltage battery manager with two batteries connected in parallel according to claim 4, characterized in that: The splicing holes on the power board (3) are adapted to the upper ends of the hexagonal copper columns (4).

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