A circuit board and a power bank

Abstract

This utility model discloses a circuit board and a power bank, belonging to the field of battery monitoring technology. It includes a battery protection chip, a tab pad unit, and a solder joint unit, which are connected sequentially. The initial state of the solder joints in the solder joint unit is unsoldered. This utility model, a circuit board and a power bank, avoids the assembly difficulties and low assembly efficiency caused by additional soldering wires. By reserving sub-solder joints on the circuit board, it avoids assembling the circuit board while it is powered on, thereby preventing the current in the battery from impacting the battery protection chip or other electrical components on the circuit board during powered assembly, thus preventing damage. After assembly, the sub-solder joints are soldered to achieve electrical connection between the battery protection chip and the battery, thereby enabling real-time monitoring of the battery voltage and its health status.

Description

Technical Field

[0001] This utility model relates to the field of battery monitoring technology, and in particular to a circuit board and a power bank. Background Technology

[0002] In battery applications, it is necessary to monitor the voltage status of the battery in real time to ensure its safe and stable operation. Especially for applications with multiple batteries connected in series, it is even more necessary to monitor the voltage status of each battery to ensure the overall safe and stable operation of the battery pack. For this purpose, it is usually necessary to establish an electrical connection with the battery through a battery protection chip to achieve voltage monitoring.

[0003] Currently, the common battery voltage monitoring solution involves connecting the battery to a circuit board via soldered wires, and then transmitting the signal to the battery protection chip through the printed circuit board to detect the battery voltage. However, this method has significant drawbacks: on the one hand, it increases the product assembly process, reduces assembly efficiency, and significantly increases assembly difficulty; on the other hand, during assembly, the current in the battery may impact the battery protection chip or other electrical components on the circuit board, causing damage; furthermore, during product use, the additional wires may loosen due to impacts or drops, thereby causing the battery voltage monitoring function to malfunction or damaging electrical components.

[0004] Therefore, there is an urgent need to improve the existing battery voltage monitoring connection method. Utility Model Content

[0005] The present invention aims to provide a circuit board and a power bank.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A circuit board includes a battery protection chip, a tab pad unit, and a solder joint unit, wherein the battery protection chip, the solder joint unit, and the tab pad unit are connected in sequence; the initial state of the solder joints of the solder joint unit is an unsoldered state.

[0008] Furthermore, the aforementioned tab pad unit includes at least one set of tab pads, the solder joint unit includes at least one set of solder joints, the battery protection chip is connected to at least one set of tab pads, and each set of tab pads is connected to a set of solder joints.

[0009] Furthermore, each set of electrode pads includes a positive electrode pad and a negative electrode pad, wherein the positive electrode pad and the negative electrode pad are respectively connected to the positive electrode and the negative electrode of a battery.

[0010] Furthermore, each group of solder joints includes a first sub-solder joint and a second sub-solder joint. The first sub-solder joint is connected to the battery protection chip, and the second sub-solder joint is connected to the positive tab pad of the corresponding group of tab pads.

[0011] Furthermore, the connection between each first sub-solder point and the battery protection chip, and the connection between each second sub-solder point and its corresponding positive electrode pad, are copper foil lines disposed in the circuit board.

[0012] Furthermore, the initial state of each first sub-solder joint and each second sub-solder joint is an unsoldered state.

[0013] In one specific embodiment, the circuit board is a printed circuit board.

[0014] This utility model also provides a portable power supply, including the aforementioned circuit board and a battery pack, wherein the circuit board is connected to the battery pack.

[0015] Furthermore, the present invention provides a portable power supply that also includes one or more charging ports, which are mounted on the circuit board.

[0016] Furthermore, one or more charging ports are USB-A ports or USB-C ports.

[0017] Beneficial effects: This utility model discloses a circuit board and a power bank. By connecting the battery to the circuit board via tab pads, it avoids the assembly difficulties and low efficiency caused by additional soldered wires, and also avoids the loosening problems that may result from adding extra wires. By pre-reserving sub-solder points on the circuit board and then soldering them after the battery and circuit board are assembled, it avoids assembling the circuit board while it is energized. This prevents the current from the battery from impacting the battery protection chip or other electrical components on the circuit board during energized assembly, thus avoiding damage. Soldering the sub-solder points after assembly establishes electrical communication between the battery protection chip and the battery, enabling real-time monitoring of the battery voltage and its health status.

[0018] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a first specific embodiment of a circuit board according to the present invention.

[0020] Figure 2 This is a schematic diagram of the structure of a second specific embodiment of a circuit board according to the present invention.

[0021] Figure 3 This is a schematic diagram of the structure of a portable power supply according to the present invention.

[0022] In the accompanying drawings, similar reference numerals refer to the same elements. Detailed Implementation

[0023] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] Figure 1 This is a schematic diagram of a first specific embodiment of a circuit board according to the present invention. In this specific embodiment, it is necessary to monitor the voltage of N batteries. Figure 1 As shown, circuit board 1 is connected to battery pack 2, which includes a first battery 21 to an Nth battery 2N, where N is an integer greater than or equal to 1. The first battery 21 to the Nth battery 2N are connected in series.

[0025] like Figure 1 As shown, the circuit board 1 provided in this embodiment includes a battery protection chip 11, a tab pad unit 12, and a solder joint unit 13, which are connected sequentially. Specifically, the tab pad unit 12 includes a first group of tab pads 121 to an Nth group of tab pads 12N, and the solder joint unit 13 includes a first group of solder joints 131 to an Nth group of solder joints 13N. The battery protection chip 11 is connected to N groups of tab pads, and each group of tab pads is connected to a set of solder joints.

[0026] Furthermore, each set of tab pads includes a positive tab pad and a negative tab pad, and the positive tab pad and the negative tab pad are respectively connected to the positive tab and the negative tab of a battery.

[0027] More specifically, taking the first set of tab pads 121 as an example, the first set of tab pads 121 includes a positive tab pad 1211 and a negative tab pad 1212, and the positive tab pad 1211 and the negative tab pad 1212 are respectively connected to the positive tab and the negative tab of the first battery 21.

[0028] More specifically, the structure of the other groups of tab pads is similar to that of the first group of tab pads 121, and will not be described in detail here.

[0029] Furthermore, each group of solder joints includes a first sub-solder joint and a second sub-solder joint. The first sub-solder joint is connected to the battery protection chip, and the second sub-solder joint is connected to the positive tab pad of the corresponding group of tab pads.

[0030] More specifically, taking the first group of solder joints 131 as an example, the first group of solder joints 131 includes a first sub-solder joint 1311 and a second sub-solder joint 1312. The first sub-solder joint 1311 is connected to the battery protection chip 11, and the second sub-solder joint 1312 is connected to the positive electrode pad 1211 of the first group of electrode pads 121.

[0031] More specifically, the structures of the other solder joints are similar to those of the first solder joint 131, and will not be described in detail here.

[0032] Furthermore, the initial state of each first sub-solder point and each second sub-solder point is an unsoldered state; after the battery and circuit board are assembled, each first sub-solder point and the second sub-solder point in the same group are in a soldered state.

[0033] More specifically, circuit board 1 is a printed circuit board (PCB).

[0034] More specifically, the connection between each first sub-solder point and the battery protection chip 11, and the connection between each second sub-solder point and its corresponding positive electrode pad, are copper foil lines set in the circuit board 1.

[0035] Optionally, the battery protection chip 11 may be a CM-1332 chip.

[0036] More specifically, the initial state of each first sub-solder point and each second sub-solder point is unsoldered. After the circuit board 1 and N batteries are assembled through the tab pads, each first sub-solder point is soldered together with the second sub-solder point in the same group, so that the copper foil lines in the circuit board 1 are connected, thereby realizing the electrical connection between the battery protection chip 11 and the N batteries, and realizing the real-time monitoring of their voltage.

[0037] In this specific embodiment, the battery and circuit board are connected together via tab pads, avoiding the assembly difficulties and low efficiency caused by additional soldered wires, as well as the potential loosening issues that may result from adding extra wires. By reserving sub-solder points on the circuit board and not soldering them initially, but only after the battery and circuit board are assembled, the assembly of the circuit board with the circuit board under power is avoided. This prevents the current in the battery from impacting the battery protection chip or other electrical components on the circuit board during the power-on process, thus avoiding damage. After assembly, the sub-solder points are soldered to establish electrical connection between the battery protection chip and the battery, thereby enabling real-time monitoring of the battery voltage and its health status.

[0038] The following explanation will continue using the example of monitoring only the voltage of one battery.

[0039] like Figure 2As shown, in this embodiment, the circuit board 1 is connected to the first battery 21. The circuit board 1 includes a battery protection chip 11, a first set of electrode pads 121 and a first set of solder joints 131, which are connected in sequence.

[0040] Furthermore, the first set of electrode pads 121 includes a positive electrode pad 1211 and a negative electrode pad 1212, which are respectively connected to the positive electrode and the negative electrode of the first battery 21.

[0041] Furthermore, the first set of solder joints 131 includes a first sub-solder joint 1311 and a second sub-solder joint 1312. The first sub-solder joint 1311 is connected to the battery protection chip 11, and the second sub-solder joint 1312 is connected to the positive electrode pad 1211.

[0042] Furthermore, the first sub-solder point 1311 and the second sub-solder point 1312 are initially unsoldered; after the battery and circuit board are assembled, the first sub-solder point 1311 and the second sub-solder point 1312 are soldered.

[0043] More specifically, circuit board 1 is a printed circuit board (PCB).

[0044] Optionally, the battery protection chip 11 may be a CM-1332 chip.

[0045] More specifically, the connection between the first sub-solder point 1311 and the battery protection chip 11, and the connection between the second sub-solder point 1312 and the positive electrode pad 1211 are copper foil lines provided in the circuit board 1.

[0046] More specifically, the first sub-solder point 1311 and the second sub-solder point 1312 are initially unsoldered. After the circuit board 1 and the first battery 21 are assembled through the tab pads, the first sub-solder point 1311 and the second sub-solder point 1312 are soldered together to connect the copper foil lines in the circuit board 1, thereby realizing the electrical connection between the battery protection chip 11 and the first battery 21 and enabling real-time monitoring of its voltage.

[0047] In this specific embodiment, the battery and circuit board are connected together by the tab pads, avoiding the assembly difficulties and low assembly efficiency caused by additional soldering wires, as well as the loosening problems that may be caused by adding extra wires. By reserving two sub-solder points on the circuit board and not soldering them first, but soldering them after the battery and circuit board are assembled, the circuit board is not assembled while energized. This avoids the current in the battery impacting the battery protection chip or other electrical components on the circuit board during energized assembly, thus preventing damage. After assembly, the two sub-solder points are soldered to achieve electrical connection between the battery protection chip and the battery, thereby enabling real-time monitoring of the battery voltage.

[0048] like Figure 3 As shown, this utility model also provides a mobile power supply for charging electronic devices, including the aforementioned circuit board 1 and a battery pack 2, with the circuit board 1 connected to the battery pack 2.

[0049] Optionally, battery pack 2 may include one battery or N batteries connected in series. When battery pack 2 includes N batteries connected in series, it can provide greater power to charge electronic devices and store greater power.

[0050] Furthermore, the portable power bank of this invention also includes one or more charging ports 3, which are mounted on the circuit board 1. Through the charging ports 3, an external power source can charge the battery pack 2; the battery pack 2 can also charge electronic devices through the charging ports 3.

[0051] Optionally, one or more charging ports 3 can be USB-A ports or USB-C ports, and this utility model is not limited thereto.

[0052] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A circuit board, characterized by, It includes a battery protection chip, a tab pad unit, and a solder joint unit, wherein the battery protection chip, the solder joint unit, and the tab pad unit are connected in sequence; the initial state of the solder joint of the solder joint unit is an unsoldered state.

2. The circuit board as described in claim 1, characterized in that, The tab pad unit includes at least one set of tab pads, the solder joint unit includes at least one set of solder joints, the battery protection chip is connected to at least one set of tab pads, and each set of tab pads is connected to a set of solder joints.

3. The circuit board as described in claim 2, characterized in that, Each set of electrode pads includes a positive electrode pad and a negative electrode pad, and the positive electrode pad and the negative electrode pad are respectively connected to the positive electrode and the negative electrode of a battery.

4. The circuit board as described in claim 3, characterized in that, Each group of solder joints includes a first sub-solder joint and a second sub-solder joint. The first sub-solder joint is connected to the battery protection chip, and the second sub-solder joint is connected to the positive tab pad of the corresponding group of tab pads.

5. The circuit board as described in claim 4, characterized in that, The connection between each first sub-solder point and the battery protection chip, and the connection between each second sub-solder point and its corresponding positive electrode pad, are copper foil lines set in the circuit board.

6. The circuit board as described in claim 4, characterized in that, The initial state of each first sub-solder point and each second sub-solder point is unsoldered; after the battery and circuit board are assembled, each first sub-solder point and the second sub-solder point in the same group are soldered.

7. The circuit board as described in claim 1, characterized in that, The circuit board is a printed circuit board.

8. A portable power bank, characterized in that, The circuit board includes a circuit board as described in any one of claims 1-7, and also includes a battery pack, wherein the circuit board is connected to the battery pack.

9. A portable power bank as described in claim 8, characterized in that, It also includes one or more charging ports, which are mounted on the circuit board.

10. A portable power bank as described in claim 9, characterized in that, One or more charging ports are USB-A or USB-C.

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