Control circuit board, battery and electronic equipment

Abstract

The utility model discloses a control circuit board, a battery and electronic equipment, and relates to the technical field of battery control circuit boards. The control circuit board comprises a first circuit board and a second circuit board, and the first circuit board is provided with a power loop; the power loop is used for charging and discharging the battery and acquiring detection information of the battery; the second circuit board is provided with a control loop; the control loop can receive the detection information and is used for generating and sending a control signal for controlling the battery to work; the first circuit board is electrically connected with the second circuit board. According to the control circuit board provided by the invention, the control loop and the power loop can be separately arranged, and under the condition that the control loop and the power loop need different laminates, the control loop and the power loop can be separately arranged according to the specifications of the laminates required by the control loop and the power loop without being arranged according to the height of the laminates; the cost can be effectively reduced; the production cycle of the circuit board is controlled; in addition, components related to control are arranged on the second circuit board in a centralized mode, and the area occupied by the components related to control can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of battery control circuit board technology, and more specifically, to a control circuit board. Furthermore, this application also relates to a battery including the aforementioned control circuit board and an electronic device including the aforementioned battery. Background Technology

[0002] Currently, battery fuel gauge control circuits on the market are all custom-designed projects. For example, in the field of laptop batteries, all projects are custom-designed and developed, making it impossible to achieve universal reuse between different projects. This results in long development cycles and high costs.

[0003] In addition, the power loop routing and signal loop routing in the battery fuel gauge control circuit have different requirements for the number of circuit board layers. They need to be set according to the higher number of layers in the PCB board, which increases the overall cost.

[0004] In conclusion, how to reduce the cost of control circuit boards is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this application is to provide a control circuit board that achieves a modular and standardized design by setting the power circuit on the first circuit board and the control circuit on the second circuit board, which can effectively reduce the process cost.

[0006] Another object of this application is to provide a battery including the above-described control circuit board and an electronic device including the above-described battery.

[0007] To achieve the above objectives, this application provides the following technical solution:

[0008] A control circuit board, comprising:

[0009] The first circuit board is equipped with a power circuit; the power circuit is used to charge and discharge the battery and acquire battery detection information.

[0010] The second circuit board is equipped with a control circuit; the control circuit is capable of receiving the detection information and generating and sending control signals to control the operation of the battery.

[0011] The first circuit board is electrically connected to the second circuit board.

[0012] Optionally, the second circuit board is disposed on the surface of the first circuit board, and the first circuit board is provided with a first welding interface, the second circuit board is provided with a second welding interface, the first welding interface and the second welding interface are welded together, the first welding interface is electrically connected to the power circuit, and the second welding interface is electrically connected to the control circuit.

[0013] Optionally, the outer peripheral side of the second circuit board is provided with a plurality of second welding interfaces, and the second welding interfaces are provided with recessed grooves that penetrate through the thickness direction of the second circuit board.

[0014] Optionally, the second circuit board is provided with a two-stage protection integrated circuit, a power meter integrated circuit, and several resistors.

[0015] Optionally, the two-stage protection integrated circuit, the power meter integrated circuit, and the resistor are all mounted on the second circuit board.

[0016] Optionally, it also includes a shielding cover disposed on the upper surface of the second circuit board, the shielding cover being used to shield electromagnetic signals;

[0017] The shielding cover completely covers the electronic components on the second circuit board.

[0018] Optionally, the shielding cover is a shell structure with an opening, the opening of the shielding cover facing the second circuit board, and the shielding cover is attached and fixed to the second circuit board.

[0019] Optionally, the projection of the shielding cover onto the second circuit board is entirely within the second circuit board, and the edge of the projection of the shielding cover onto the second circuit board is spaced apart from the outer peripheral edge of the second circuit board.

[0020] A battery includes a control circuit board as described in any of the above claims and a battery body, wherein the tabs of the battery body are electrically connected to the first circuit board.

[0021] An electronic device comprising the battery described above.

[0022] This application provides a control circuit board, including a first circuit board and a second circuit board. The first circuit board is provided with a power circuit. The power circuit is used to charge and discharge a battery and acquire battery detection information. The detection information mentioned herein includes information such as battery voltage, current, and temperature. The second circuit board is provided with a control circuit. The control circuit is capable of receiving the detection information and is used to generate and send control signals to control the operation of the battery. The first circuit board and the second circuit board are electrically connected.

[0023] In actual use, the battery can be charged and discharged through the power circuit, and the start and stop of charging and discharging can be controlled by the control circuit. The power circuit can obtain the battery's detection information, specifically, the detection information can be output voltage, current, temperature and other information. The control circuit is electrically connected to the power circuit. The control circuit generates a control signal to control the operation of the battery based on the detection information and sends the control signal to the host.

[0024] The beneficial effects of the control circuit board provided in this application include:

[0025] 1. Separate settings for control circuits and power circuits: When the control circuits and power circuits require different layers, it is not necessary to set them according to the number of layers. Instead, they can be set according to the specifications of the layers required for the control circuits and power circuits, which can effectively reduce costs and shorten the production cycle of control circuit boards.

[0026] 2. In this application, the control loop is set separately on the second circuit board, and the relevant control components are centrally set on the second circuit board, which realizes standardization and modularization and can effectively reduce the area occupied by the control-related components.

[0027] 3. In this application, the control circuit is set separately on the second circuit board, which can adapt to batteries with different numbers of cells in series, thus improving versatility.

[0028] 4. The control circuit and power circuit are set up separately. The pins of the second circuit board only run through the control circuit, reducing the degree of confusion and effectively improving the anti-interference capability of the integrated circuit.

[0029] In addition, this application also provides a battery including the above-described control circuit board and an electronic device including the above-described battery. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0031] Figure 1 An exploded view of a specific embodiment of the control circuit board provided in this application;

[0032] Figure 2 A schematic diagram of a specific embodiment of the control circuit board provided in this application;

[0033] Figure 3 A schematic diagram illustrating the installation of the shielding cover for the control circuit board provided in this application;

[0034] Figure 4 This is a schematic diagram of the structure of the second circuit board provided in this application;

[0035] Figure 5 for Figure 4 A top view of the second circuit board.

[0036] Figures 1-5 middle:

[0037] 1 represents the first circuit board;

[0038] 2 is the second circuit board, 21 is the second welding interface, 22 is the two-stage protection integrated circuit, and 23 is the power meter integrated circuit;

[0039] 3 is a shielding protective cover. Detailed Implementation

[0040] 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, and 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.

[0041] The core of this application is to provide a control circuit board. By setting the power circuit on the first circuit board and the control circuit on the second circuit board, a modular and standardized design is achieved, which can effectively reduce process costs.

[0042] Another core aspect of this application is to provide a battery including the aforementioned control circuit board and an electronic device including the aforementioned battery.

[0043] Example 1

[0044] This specific embodiment provides a control circuit board, including a first circuit board 1 and a second circuit board 2. The first circuit board 1 is provided with a power circuit. The power circuit is used to charge and discharge the battery and acquire the battery's detection information. The detection information mentioned here includes information such as the battery's voltage, current, and temperature. The second circuit board 2 is provided with a control circuit. The control circuit can receive the detection information and is used to generate and send control signals to control the operation of the battery. The first circuit board 1 and the second circuit board 2 are electrically connected.

[0045] The power circuit mentioned in this specific embodiment is a power trace, whose main function is to provide a power transmission path for various components in the circuit. It delivers power from the power source (such as a battery or power adapter) to components that require power, such as chips, integrated circuits, resistors, and capacitors. The control circuit mentioned in this specific embodiment is a signal trace, used to transmit various electrical signals, including digital signals (such as binary data signals composed of high and low levels) and analog signals (such as audio signals and video signals). Signal traces serve as a bridge for communication between various components in the circuit. They also transmit various control signals, such as read / write signals from the CPU to the memory chip.

[0046] In actual use, the battery can be charged and discharged through the power circuit, and the start and stop of charging and discharging can be controlled by the control circuit. The power circuit can obtain the battery's detection information, specifically, the detection information can be output voltage, current, temperature and other information. The control circuit is electrically connected to the power circuit. The control circuit generates a control signal to control the operation of the battery based on the detection information and sends the control signal to the host.

[0047] The routing requirements for the control circuit and the power circuit are different. The control circuit provided in this application can realize the separate setting of the control circuit and the power circuit. When the control circuit and the power circuit require different layers, it is not necessary to set according to the higher number of layers. Instead, they can be set according to the required layer specifications of the control circuit and the power circuit, which can effectively reduce costs and shorten the production cycle of the control circuit.

[0048] Furthermore, in this application, the control loop is separately located on the second circuit board 2, and all relevant control components are centrally located on the second circuit board 2, achieving standardization and modularization, which can effectively reduce the area occupied by control-related components. The second circuit board 2 can serve as a standardized, universal circuit board, eliminating the need for redesign in similar projects; the second circuit board 2 can be used instead, improving efficiency and reducing R&D costs.

[0049] Furthermore, in this application, the control circuit is separately located on the second circuit board 2, which can accommodate batteries with different numbers of strings, improving versatility. Specifically, the second circuit board 2 with the same number of strings can be shared, and a common 4-string control scheme can be designed. Alternatively, in the case of a common 4-string configuration, components with different resistance values ​​in the same package can be mounted on the second circuit board 2 to meet the requirements of 3-string and 2-string designs. It should be noted that the 4-string configuration mentioned in this application refers to a battery pack composed of 4 individual batteries connected in series, the 3-string configuration represents a battery pack composed of 3 individual batteries connected in series, and the 2-string configuration represents a battery pack composed of 2 individual batteries connected in series. The output of the second circuit board 2 is fixed at a 4-string hardware scheme. The control schemes for different numbers of batteries (different numbers of strings) mainly differ in the resistance and capacitance on the voltage detection line. By mounting two capacitors and resistors on the voltage detection line during surface mounting and then programming the software inside the fuel gauge integrated circuit 23 to other string numbers, the 4-string scheme can be changed to a 3-string scheme or a 2-string scheme.

[0050] On the other hand, by separating the control circuit and the power circuit, the pins of the second circuit board 2 only run through the control circuit, reducing the degree of confusion and effectively improving the anti-interference capability of the integrated circuit.

[0051] Example 2

[0052] like Figure 1 , Figure 3 , Figure 4 , Figure 5As shown, the second circuit board 2 is disposed on the surface of the first circuit board 1, and the first circuit board 1 is provided with a first welding interface, and the second circuit board 2 is provided with a second welding interface 21. The first welding interface and the second welding interface 21 are welded together. The first welding interface is electrically connected to the power circuit, and the second welding interface 21 is electrically connected to the control circuit. Specifically, multiple second welding interfaces 21 can be provided on the outer peripheral side of the second circuit board 2. The second welding interface 21 is provided with a recessed groove that penetrates the thickness direction of the second circuit board 2.

[0053] Specifically, such as Figure 4 , Figure 5 As shown, the second circuit board 2 can be configured as a rectangular circuit board, and second welding interfaces 21 are provided on all four sides of the rectangular circuit board. The second welding interfaces 21 are arc-shaped recesses. Figure 1 , Figure 3 As shown, the size of the second circuit board 2 is smaller than that of the first circuit board 1, so that control-related components can be centrally set on the second circuit board 2 to achieve standardized and modular setup.

[0054] The control loop samples detection information on the power loop, including signals such as voltage, current, and temperature. This information is transmitted back to the control loop on the second circuit board 2 via the interface between the first circuit board 1 and the second circuit board 2. After processing, the control loop controls the battery's charge / discharge switch via control signals and reports relevant battery information to the host via the bus. During the transmission of detection information from the power loop to the control loop, the first welding interface and the second welding interface 21 can be configured as network connections in a specific sequence. The network includes voltage detection signal lines, current detection signal lines, temperature detection signal lines, SMBus communication lines, charge / discharge tube switch control lines, and FUSE fuse control lines. Connection signals are provided at the first welding interface and the second welding interface 21 to connect the aforementioned signal lines to the voltage, current, and temperature signals collected by the power loop on the first circuit board 1.

[0055] In this application, a second welding interface 21 is provided on the outer peripheral side of the second circuit board 2, and a groove is provided at the second welding interface 21. This avoids the second welding interface 21 protruding from the outer peripheral side of the second circuit board 2 and occupying additional installation space. At the same time, it also protects the second welding interface 21 from being damaged. In addition, using a welding connection to connect the first circuit board 1 and the second circuit board 2 can effectively improve the connection strength between the first circuit board 1 and the second circuit board 2.

[0056] Example 3

[0057] like Figure 4 , Figure 5As shown, the second circuit board 2 is provided with a two-stage protection integrated circuit 22, a fuel gauge integrated circuit 23 and several resistors; and the two-stage protection integrated circuit 22, the fuel gauge integrated circuit 23 and the resistors are all attached to the second circuit board 2.

[0058] The two-stage protection integrated circuit 22 is a two-stage protection IC, typically referring to a chip in electronic equipment that provides two levels of protection. Level one protection primarily prevents minor abnormalities. For example, in a power supply circuit, it might suppress small voltage fluctuations. When the input voltage experiences a momentary spike or trough, as long as the change is within the range set by level one protection, it can stabilize the output voltage by adjusting its internal circuit parameters (such as changing the on-resistance), ensuring that subsequent circuits receive a relatively stable voltage signal. Level two protection is set up to handle more severe abnormalities, building upon level one protection. When level one protection fails or encounters a large abnormality exceeding its handling capacity (such as power surges or severe electrostatic discharge), level two protection activates. For instance, when electronic equipment suffers a powerful surge voltage induced by lightning strikes, the level two protection IC might quickly disconnect the circuit or bypass the overvoltage signal to ground to prevent sensitive internal electronic components (such as chips and transistors) from being damaged by high voltage. Its tolerance range for abnormal voltages is usually higher than that of level one protection.

[0059] The fuel gauge integrated circuit 23 is a fuel gauge IC, an integrated circuit chip used to measure and monitor battery power. It is widely used in various electronic devices. It can accurately measure the remaining battery power in real time and output it in digital form for easy display by the device and viewing by the user. Based on the current charge / discharge state of the battery and historical data, it can predict the remaining battery usage time and the time required to fully charge the battery, helping users to rationally arrange device usage and charging plans. When applied to laptops, it can estimate how long the battery can last under the current working state. It monitors battery voltage and current, and when the battery voltage is higher than the overcharge threshold or lower than the over-discharge threshold, it can promptly cut off the charging and discharging circuit to prevent the battery from bulging, leaking, or even exploding due to overcharging, or irreversible damage due to over-discharging, effectively extending battery life. In multi-cell battery pack applications, it ensures that the charge / discharge state of each battery cell is consistent, avoiding overcharging and over-discharging of individual batteries, improving the overall performance and lifespan of the battery pack. It is commonly used in lithium battery packs used in electric vehicles, electric bicycles, etc. It can transmit data with the device's main control chip or other external devices through communication interfaces such as I2C and SPI, realizing real-time sharing and interaction of power information, which facilitates the system's comprehensive management and control of battery status.

[0060] In this specific embodiment, by adopting a surface-mount mounting method, the output of the control board is fixed at a 4-cell hardware scheme during actual use. The control scheme for different numbers of batteries (different cell numbers) mainly lies in the difference between the resistors and capacitors on the voltage detection lines. By mounting two capacitors and resistors on the voltage detection lines during surface mounting, and then burning the software inside the fuel gauge integrated circuit 23 to other cell numbers, the 4-cell scheme can be changed to a 3-cell scheme or a 2-cell scheme to accommodate batteries with different cell numbers, thereby improving the versatility of the second circuit board 2.

[0061] Example 4

[0062] like Figure 1 , Figure 2 , Figure 3 As shown, the control circuit board also includes a shielding cover 3 covering the upper surface of the second circuit board 2. The shielding cover 3 is used to shield electromagnetic signals. The shielding cover 3 completely covers the electronic components on the second circuit board 2. Specifically, the shielding cover 3 can be a shell structure with an opening. The opening of the shielding cover 3 faces the second circuit board 2, and the shielding cover 3 is attached and fixed to the second circuit board 2. The projection of the shielding cover 3 onto the second circuit board 2 is completely located inside the second circuit board 2, and the edge of the projection of the shielding cover 3 onto the second circuit board 2 is spaced from the outer peripheral edge of the second circuit board 2.

[0063] In this specific embodiment, the shielding cover 3 effectively improves the EMC (Electromagnetic Compatibility) capability of the control circuit board, which refers to the ability of a device or system to operate normally in its electromagnetic environment without causing unacceptable electromagnetic interference to anything in that environment. The shielding cover 3 effectively prevents the control circuit from being subjected to electromagnetic interference. Vulnerable areas such as IC signal circuits in the control loop are integrated with protection, enhancing anti-interference capabilities. Furthermore, because the modules share a single board, the trial-and-error costs of EMC / ESD (Electro-Static Discharge) testing in the early stages of the project are reduced.

[0064] In addition to the control circuit board described above, this application also provides a battery that includes the control circuit board and battery body disclosed in the above embodiments. The structure of other parts of the battery can be found in the prior art and will not be described in detail here.

[0065] In this specific embodiment, the tabs of the battery body are electrically connected to the first circuit board 1. The first circuit board 1 is provided with nickel bricks for electrical connection with the tabs of the battery body. When the position of the tabs of the battery body changes, the position of the corresponding nickel bricks on the first circuit board 1 will also be adjusted accordingly.

[0066] In addition to the battery described above, this application also provides an electronic device that includes the battery described above.

[0067] The electronic device in this specific embodiment can be a laptop, tablet, mobile phone, or other electronic devices that meet the requirements, depending on the actual situation.

[0068] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. All combinations of the embodiments provided in this application are within the scope of protection of this application and will not be elaborated upon here.

[0069] The control circuit board, battery, and electronic device provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A control circuit board, characterized in that, include: The first circuit board (1) is provided with a power circuit; the power circuit is used to charge and discharge the battery and acquire battery detection information; The second circuit board (2) is provided with a control circuit; the control circuit is capable of receiving the detection information and generating and sending control signals to control the operation of the battery; The first circuit board (1) is electrically connected to the second circuit board (2).

2. The control circuit board according to claim 1, characterized in that, The second circuit board (2) is disposed on the surface of the first circuit board (1), and the first circuit board (1) is provided with a first welding interface, and the second circuit board (2) is provided with a second welding interface (21). The first welding interface and the second welding interface (21) are welded together. The first welding interface is electrically connected to the power circuit, and the second welding interface (21) is electrically connected to the control circuit.

3. The control circuit board according to claim 2, characterized in that, The outer peripheral side of the second circuit board (2) is provided with a plurality of second welding interfaces (21), and the second welding interface (21) is provided with a recessed groove that penetrates the thickness direction of the second circuit board (2).

4. The control circuit board according to claim 1, characterized in that, The second circuit board (2) is provided with a two-stage protection integrated circuit (22), a power meter integrated circuit (23) and several resistors.

5. The control circuit board according to claim 4, characterized in that, The two-stage protection integrated circuit (22), the power meter integrated circuit (23), and the resistor are all attached to the second circuit board (2).

6. The control circuit board according to claim 1, characterized in that, It also includes a shielding cover (3) covering the upper surface of the second circuit board (2), the shielding cover (3) being used to shield electromagnetic signals; The shielding cover (3) completely covers the electronic components on the second circuit board (2).

7. The control circuit board according to claim 6, characterized in that, The shielding cover (3) is a shell structure with an opening. The opening of the shielding cover (3) faces the second circuit board (2), and the shielding cover (3) is attached and fixed to the second circuit board (2).

8. The control circuit board according to claim 6, characterized in that, The projection of the shielding cover (3) onto the second circuit board (2) is completely located within the second circuit board (2), and the edge of the projection of the shielding cover (3) onto the second circuit board (2) is spaced apart from the outer peripheral edge of the second circuit board (2).

9. A battery, characterized in that, It includes the control circuit board as described in any one of claims 1-8 and the battery body, wherein the tabs of the battery body are electrically connected to the first circuit board (1).

10. An electronic device, characterized in that, Includes the battery as described in claim 9.

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