Control assembly and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a control assembly and a battery pack, the control assembly has a first direction and comprises a first printed board and a second printed board, the first printed board and the second printed board are stacked in the thickness direction of the first printed board and are connected, the first printed board is provided with a control circuit, and the second printed board is provided with a second direction. The second printed board is provided with a power circuit, and the control circuit is electrically connected with the power circuit. According to the application, the first printed board provided with the control circuit and the second printed board provided with the power circuit are stacked, so that the problem that the control circuit and the power circuit are integrated on the same printed board to cause inconvenience in installation and maintenance can be solved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a control component and a battery pack. Background Technology

[0002] A Battery Management System (BMS) is an indispensable key component in electric vehicles, energy storage systems, and various portable electronic devices. It is primarily responsible for monitoring critical parameters of the battery pack, such as voltage, current, and temperature, to ensure the safe and efficient operation of the battery. By precisely controlling the battery's charging and discharging process, the BMS effectively extends battery life and improves the overall system reliability and stability.

[0003] In related technologies, battery management systems typically arrange the control circuitry and power circuitry on the same protection board. This design was common in early battery management systems because their functions were relatively simple, requiring fewer components and resulting in a smaller overall board area. However, as the functions of battery management systems have expanded and the number of components has increased, the limitations of this technology have gradually become apparent.

[0004] When a battery management system is designed directly onto a printed circuit board, the overall dimensions are relatively large due to the integration of control and power circuits, making it impossible to accommodate batteries with specific size requirements. Furthermore, the heat generated by the power section can affect the stability of the control board signals, increasing the difficulty of system design and maintenance. Utility Model Content

[0005] This application provides a control component to solve the problem of inconvenient installation and maintenance caused by integrating control circuits and power circuits onto the same printed circuit board.

[0006] In a first aspect, this application provides a control component, including a first printed circuit board and a second printed circuit board, wherein the first printed circuit board and the second printed circuit board are stacked along the thickness direction of the first printed circuit board and connected to each other, wherein the first printed circuit board is provided with a control circuit and the second printed circuit board is provided with a power circuit.

[0007] Beneficial effects: By placing the control circuit and power circuit on two stacked printed circuit boards (PCBs), respectively, the circuit modules are separated, significantly reducing the horizontal space occupied by the control components and facilitating adaptation to battery packs of different sizes. Simultaneously, this design helps reduce the impact of power component heat generation on the stability of the control circuit signals, improving the overall system reliability and stability.

[0008] In one optional embodiment, the second printed circuit board is provided with a fixing hole, and the side of the first printed circuit board facing the second printed circuit board is provided with a fixing member. The second printed circuit board is connected to the fixing member through a connector inserted into the fixing hole.

[0009] Beneficial effects: Through the cooperation of fixing holes, fasteners, and connectors, a firm connection is achieved between the two printed circuit boards, ensuring the stability of the electrical connection between the first and second printed circuit boards. This connection method is simple and easy to implement, facilitating installation and maintenance.

[0010] In one optional embodiment, the fixing member has a threaded hole near the end of the second printed circuit board along the thickness direction of the first printed circuit board, and the connecting member passes through the fixing hole and is connected to the threaded hole by threads.

[0011] Beneficial effects: The threaded connection provides stronger connection force, ensuring the stability of the first and second printed circuit boards during long-term use. At the same time, the threaded connection facilitates disassembly and replacement, improving maintenance convenience.

[0012] In one optional embodiment, the connector includes a connecting portion and an abutting portion, the connecting portion being connected to the abutting portion, the connecting portion passing through the fixing hole and being threadedly connected to the threaded hole, and the abutting portion abutting against the side of the second printed circuit board opposite to the first printed circuit board.

[0013] Beneficial effects: The abutment design of the connector increases the contact area between the second printed circuit boards, improving the stability of the connection. At the same time, the abutment also helps to distribute stress, preventing the second printed circuit board from deforming or being damaged due to uneven stress.

[0014] In one optional embodiment, the fixing member has a positioning post at the end away from the second printed circuit board along the thickness direction of the first printed circuit board, and a positioning hole is provided on the side of the first printed circuit board facing the second printed circuit board. The positioning post passes through the positioning hole and is connected to the positioning hole.

[0015] Beneficial effects: The design of the positioning posts and holes facilitates precise positioning before connecting the first and second printed circuit boards, ensuring consistent alignment and spacing between the two boards. This contributes to improved accuracy and efficiency in subsequent connections.

[0016] In one alternative embodiment, the system further includes a pin header and a female header, one of which is disposed on the side of the first printed circuit board facing the second printed circuit board, and the other is disposed on the side of the second printed circuit board facing the first printed circuit board, wherein the pin header is connected to the female header.

[0017] Beneficial effects: The pin header and nut header connection provides a high-density, high-reliability electrical connection between the first and second printed circuit boards. This connection method facilitates installation and removal, as well as signal transmission and testing.

[0018] In an optional embodiment, a signal input terminal is further included. The signal input terminal is disposed on the side of the first printed circuit board facing the second printed circuit board. The signal input terminal is electrically connected to the control circuit and is adapted to acquire control signals.

[0019] Beneficial effects: The design of the signal input terminal enables the control circuit to receive external control signals, thereby achieving precise management and control of the battery pack. This design improves the intelligence level and response speed of the battery pack.

[0020] In one optional implementation, a power input interface and a power output interface are further included, both of which are disposed on the side of the second printed circuit board opposite to the first printed circuit board, and the power input interface and the power output interface are electrically connected to the power circuit.

[0021] Beneficial effects: The design of the power input and output interfaces allows the power circuitry to connect to external power sources and loads, thereby enabling the charging and discharging management of the battery pack. This design improves the compatibility and usability of the battery pack.

[0022] In one alternative implementation, both the power input interface and the power output interface are provided in two forms.

[0023] Beneficial effects: The design of two power input interfaces and a power output interface improves the charging and discharging efficiency of the battery pack, while also facilitating backup and redundancy design, thus improving the reliability and stability of the system.

[0024] Secondly, this application also provides a battery pack including the aforementioned control components.

[0025] Since the battery pack includes control components, it has the same effect as the control components, which will not be elaborated here. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a control component according to an embodiment of this application;

[0028] Figure 2 This is an exploded view of a control component according to an embodiment of this application;

[0029] Figure 3 This is a top view of a control component according to an embodiment of this application;

[0030] Figure 4 This is a bottom view of a control component according to an embodiment of this application;

[0031] Figure 5 This is a side view of a control component according to an embodiment of this application;

[0032] Figure 6 This is a schematic diagram of the structure of the fastener in the embodiments of this application;

[0033] Figure 7 This is a schematic diagram of the connector structure in an embodiment of this application.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1. First printed circuit board; 1001. Positioning hole; 2. Second printed circuit board; 2001. Fixing hole; 3. Fixing component; 3001. Threaded hole; 3002. Positioning pin; 4. Connecting component; 4001. Connecting part; 4002. Abutting part; 5. Pin header; 6. Female header; 7. Signal input terminal; 8. Power input interface; 9. Power output interface. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] The following is combined Figures 1 to 7 This describes an embodiment of the present application.

[0038] According to an embodiment of this application, in one aspect, a control component is provided, including a first printed circuit board 1 and a second printed circuit board 2. The first printed circuit board 1 and the second printed circuit board 2 are stacked along the thickness direction of the first printed circuit board 1 and are connected to each other. The first printed circuit board 1 is provided with a control circuit, and the second printed circuit board 2 is provided with a power circuit.

[0039] It should be noted that the first printed circuit board 1 is the control board of the battery management system, including an analog front-end, an isolated power supply, a microcontroller unit (MCU), and control circuitry for connection. The second printed circuit board 2 is the power board of the battery management system, including MOS switching circuitry (MOS stands for Metal Oxide Semiconductor) and power circuitry. Dividing the battery management system into the first printed circuit board 1 and the second printed circuit board 2 according to the control section and the high-current, high-power section effectively reduces the length and width of the battery management system. The battery management system module can be compatible with more batteries of different sizes. It also effectively reduces the interference of high-current signals on low-current signals and effectively reduces the impact of high-current heat-generating devices on the control circuitry on the first printed circuit board 1. The first printed circuit board 1 and the second printed circuit board 2 are directly detachable, which not only facilitates maintenance but also allows for individual upgrades of parts of the first printed circuit board 1 and the second printed circuit board 2 during battery management system upgrades.

[0040] Understandably, by stacking and connecting the first printed circuit board 1 and the second printed circuit board 2 along the thickness direction of the first printed circuit board 1, the first printed circuit board 1 and the second printed circuit board 2 can be configured as a single integrated structure with relatively fixed positions, and the first printed circuit board 1 and the second printed circuit board 2 are parallel to each other. Optionally, by stacking and connecting the first printed circuit board 1 and the second printed circuit board 2, the first printed circuit board 1 and the second printed circuit board 2 can be configured as a structure with non-fixed relative positions, which facilitates adjustment of positions at any time.

[0041] In this embodiment, by separately mounting the control circuit and power circuit on two stacked printed circuit boards 1 and 2, the circuit modules are separated, significantly reducing the horizontal space occupied by the control components and facilitating adaptation to battery packs of different sizes. Simultaneously, this design also helps reduce the impact of power component heat generation on the stability of the control circuit signals, improving the overall system reliability and stability.

[0042] In one embodiment, the second printed circuit board 2 is provided with a fixing hole 2001, and the side of the first printed circuit board 1 facing the second printed circuit board 2 is provided with a fixing member 3. The second printed circuit board 2 is connected to the fixing member 3 through a connector 4 inserted into the fixing hole 2001.

[0043] It should be noted that the end of the connector 4 away from the second printed circuit board 2 along the thickness direction of the first printed circuit board 1 abuts against the side wall of the second printed circuit board 2, and the end of the fixing member 3 away from the first printed circuit board 1 along the thickness direction of the first printed circuit board 1 abuts against the other opposite side wall of the second printed circuit board 2, so that the second printed circuit board 2 can be clamped and fixed by the connector 4 and the fixing member 3, thereby realizing the relative fixation of the first printed circuit board 1 and the second printed circuit board 2.

[0044] Optionally, the cross-sectional shape of the fixing hole 2001 perpendicular to the thickness direction of the first printed circuit board 1 can be set as a circle, a near-circular shape, a strip shape or other polygonal structure, so that the connector 4 can pass through the fixing hole 2001 and the connector 4 abuts against the side wall of the second printed circuit board 2 at the end of the first printed circuit board 1 away from the second printed circuit board 2.

[0045] In this embodiment, a secure connection between the two printed circuit boards is achieved through the cooperation of the fixing hole 2001, the fixing member 3, and the connector 4, ensuring the stability of the electrical connection between the first printed circuit board 1 and the second printed circuit board 2. This connection method is simple and easy to implement, facilitating installation and maintenance.

[0046] In one embodiment, the fixing member 3 is provided with a threaded hole 3001 at the end near the second printed circuit board 2 along the thickness direction of the first printed circuit board 1, and the connecting member 4 passes through the fixing hole 2001 and is connected to the threaded hole 3001 by threads.

[0047] Understandably, the outer wall of the connector 4 is also provided with a threaded structure, which can cooperate with the threaded structure in the threaded hole 3001 to fix the connector 4 and the fastener 3, and finally fix the first printed circuit board 1 and the second printed circuit board 2.

[0048] Optionally, connector 4 can be a screw.

[0049] In this embodiment, the threaded connection provides stronger connection force, ensuring the stability of the first printed circuit board 1 and the second printed circuit board 2 during long-term use. At the same time, the threaded connection also facilitates disassembly and replacement, improving maintenance convenience.

[0050] In one embodiment, the fastener 3 is provided with a recessed groove at the end of the first printed circuit board 1 near the second printed circuit board 2 along the thickness direction of the first printed circuit board 1. A snap-fit ​​groove is provided on the inner wall of the recessed groove, and an elastic snap-fit ​​block is provided on the outer wall of the connector 4. The snap-fit ​​block can snap-fit ​​and fix with the snap-fit ​​groove, thereby realizing the fixed connection of the first printed circuit board 1 and the second printed circuit board 2.

[0051] In one embodiment, elastic washers are provided between the second printed circuit board 2 and the connector 4 and the fixing member 3, the connector 4 passes through the elastic washers, and the elastic washers are configured as insulating structures.

[0052] In one embodiment, the connector 4 includes a connecting portion 4001 and an abutting portion 4002. The connecting portion 4001 is connected to the abutting portion 4002. The connecting portion 4001 passes through the fixing hole 2001 and is threadedly connected to the threaded hole 3001. The abutting portion 4002 abuts against the side of the second printed circuit board 2 that is away from the first printed circuit board 1.

[0053] It should be noted that the cross-sectional shape of the abutment portion 4002 perpendicular to the thickness direction of the first printed circuit board 1 can be set as a circular, near-circular, or polygonal structure, and the maximum straight length of the abutment portion 4002 perpendicular to the thickness direction of the first printed circuit board 1 is greater than the maximum straight length of the first printed circuit board 1 in the thickness direction of the fixing hole 2001, so that the abutment portion 4002 can abut against the side wall of the second printed circuit board 2.

[0054] In this embodiment, the abutment portion 4002 of the connector 4 is designed to increase the contact area between the second printed circuit boards 2, thereby improving the stability of the connection. At the same time, the abutment portion 4002 can also disperse stress, preventing the second printed circuit board 2 from deforming or being damaged due to uneven stress.

[0055] In one embodiment, the fixing member 3 is provided with a positioning post 3002 at the end away from the second printed circuit board 2 along the thickness direction of the first printed circuit board 1. The side of the first printed circuit board 1 facing the second printed circuit board 2 is provided with a positioning hole 1001. The positioning post 3002 passes through the positioning hole 1001 and is connected to the positioning hole 1001.

[0056] It should be noted that the cross-sectional shape of the positioning post 3002, perpendicular to the thickness direction of the first printed circuit board 1, can be circular, near-circular, or polygonal, and the shape of the positioning post is compatible with that of the positioning hole 1001. The positioning post 3002 can be first connected to the first printed circuit board 1 by soldering. Specifically, the positioning post 3002 is inserted into the positioning hole 1001 and then soldered to the first printed circuit board 1. Alternatively, the fixing member 3 can be soldered to the first printed circuit board 1.

[0057] In this embodiment, the design of the positioning post 3002 and the positioning hole 1001 facilitates precise positioning before connecting the first printed circuit board 1 and the second printed circuit board 2, ensuring consistent alignment and spacing between the two printed circuit boards. This helps improve the accuracy and efficiency of subsequent connections.

[0058] In one embodiment, the system further includes a pin header 5 and a female header 6, one of which is disposed on the side of the first printed circuit board 1 facing the second printed circuit board 2, and the other is disposed on the side of the second printed circuit board 2 facing the first printed circuit board 1, wherein the pin header 5 and the female header 6 are connected.

[0059] It should be noted that the connection between pin header 5 and pin header 6 enables the control signal connection between the first printed circuit board 1 and the second printed circuit board 2.

[0060] In this embodiment, the connection between the pin header 5 and the female header 6 provides a high-density, high-reliability electrical connection between the first printed circuit board 1 and the second printed circuit board 2. This connection method facilitates installation and disassembly, as well as signal transmission and testing.

[0061] In one embodiment, a signal input terminal 7 is also included. The signal input terminal 7 is disposed on the side of the first printed circuit board 1 facing the second printed circuit board 2. The signal input terminal 7 is electrically connected to the control circuit and is adapted to acquire control signals.

[0062] In this embodiment, the design of signal input terminal 7 enables the control circuit to receive external control signals, thereby achieving precise management and control of the battery pack. This design improves the intelligence level and response speed of the battery pack.

[0063] In one embodiment, a power input interface 8 and a power output interface 9 are also included, both of which are disposed on the side of the second printed circuit board 2 opposite to the first printed circuit board 1, and the power input interface 8 and the power output interface 9 are electrically connected to the power circuit.

[0064] In this embodiment, the design of the power input interface 8 and the power output interface 9 enables the power circuit to connect to an external power source and load, thereby achieving charging and discharging management of the battery pack. This design improves the compatibility and usability of the battery pack.

[0065] In one embodiment, both the power input interface 8 and the power output interface 9 are provided in twos.

[0066] In this embodiment, the design of two power input interfaces 8 and power output interfaces 9 improves the charging and discharging efficiency of the battery pack, while also facilitating backup and redundancy design, thereby improving the reliability and stability of the system.

[0067] In one embodiment, the control component is assembled as follows:

[0068] The first printed circuit board 1 is equipped with various components using surface mount technology (SMT) and the mounting bracket 3 is soldered using wave soldering. The second printed circuit board 2 is also equipped with various components using surface mount technology. The second printed circuit board 2 is mounted on top of the first printed circuit board 1, and the first and second printed circuit boards 1 and 2 are electrically connected by mating nuts 6 and pin headers 5. Finally, the connector 4 is connected to the mounting bracket 3 through the mounting hole 2001.

[0069] According to an embodiment of this application, another aspect provides a battery pack including a control component.

[0070] Since the battery pack includes control components, it has the same effect as the control components, which will not be elaborated here.

[0071] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A control component, characterized in that, include: A first printed circuit board (1) and a second printed circuit board (2) are stacked along the thickness direction of the first printed circuit board (1) and connected to each other. The first printed circuit board (1) is provided with a control circuit and the second printed circuit board (2) is provided with a power circuit.

2. The control component according to claim 1, characterized in that, The second printed circuit board (2) is provided with a fixing hole (2001), and the first printed circuit board (1) is provided with a fixing member (3) on the side facing the second printed circuit board (2). The second printed circuit board (2) is connected to the fixing member (3) through a connector (4) inserted into the fixing hole (2001).

3. The control component according to claim 2, characterized in that, The fixing member (3) has a threaded hole (3001) at the end of the first printed circuit board (1) near the second printed circuit board (2) along the thickness direction. The connecting member (4) passes through the fixing hole (2001) and is connected to the threaded hole (3001) by thread.

4. The control component according to claim 3, characterized in that, The connector (4) includes a connecting part (4001) and an abutting part (4002). The connecting part (4001) is connected to the abutting part (4002). The connecting part (4001) passes through the fixing hole (2001) and is threadedly connected to the threaded hole (3001). The abutting part (4002) abuts against the side of the second printed circuit board (2) away from the first printed circuit board (1).

5. The control component according to claim 2, characterized in that, The fixing member (3) has a positioning post (3002) at the end away from the second printed circuit board (2) along the thickness direction of the first printed circuit board (1). The first printed circuit board (1) has a positioning hole (1001) on the side facing the second printed circuit board (2). The positioning post (3002) passes through the positioning hole (1001) and is connected to the positioning hole (1001).

6. The control component according to claim 1, characterized in that, Also includes: The pin header (5) and the nut header (6) are respectively disposed on the side of the first printed circuit board (1) facing the second printed circuit board (2) and the other disposed on the side of the second printed circuit board (2) facing the first printed circuit board (1). The pin header (5) and the nut header (6) are connected.

7. The control component according to claim 1, characterized in that, Also includes: The signal input terminal (7) is located on the side of the first printed circuit board (1) facing the second printed circuit board (2). The signal input terminal (7) is electrically connected to the control circuit and is adapted to acquire control signals.

8. The control component according to claim 1, characterized in that, Also includes: The power input interface (8) and the power output interface (9) are both located on the side of the second printed circuit board (2) opposite to the first printed circuit board (1), and the power input interface (8) and the power output interface (9) are electrically connected to the power circuit.

9. The control component according to claim 8, characterized in that, Both the power input interface (8) and the power output interface (9) are provided in twos.

10. A battery pack, characterized in that, include: The control component according to any one of claims 1 to 9.

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