Circuit board assembly mounting structure

Abstract

The utility model discloses a circuit board assembly mounting structure, relates to the technical field of battery packs, and solves the problem of short circuit caused by easy contact between a connecting part between a circuit board and a busbar and a conductive plate. The device comprises a circuit board, two side edges, close to the positive and negative electrodes of a battery cell, of the circuit board are respectively provided with connecting sheets, and the circuit board is provided with an input end and an output end; the connecting sheet on at least one side of the circuit board can be inserted into the back surface of the insulating plate; the busbar is electrically connected with the positive electrodes or the negative electrodes of at least part of the battery cells, and the connecting sheet is used for electrically connecting the busbar with the circuit board; and the current input conductive plate is isolated from the connecting sheet through the insulating plate. The current input conductive plate is isolated from the connecting sheet through the insulating plate, so that the current input conductive plate is prevented from being in contact with the connecting sheet in a working scene such as a bumping process of an automobile, the problem of poor contact or short circuit is avoided, normal working of the circuit board is ensured, and the use safety of the battery pack is improved.

Description

Technical Field

[0001] This utility model relates to the field of battery pack technology, and in particular to a circuit board assembly mounting structure. Background Technology

[0002] A circuit board is installed inside the battery pack housing. The main functions of this circuit board include managing the battery charging and discharging process, monitoring the battery status, and protecting battery safety.

[0003] Battery packs, which can be used as, but are not limited to, automotive starting power sources, typically have conductive plates soldered to their internal circuit boards at the current input and output terminals. These conductive plates connect to busbars or terminals. The busbars connect to the positive or negative terminals of the battery cells within the pack. The cells collect current onto the busbars, which then transmit the current to the circuit board, and finally output it through the terminals. Due to limited space within the battery pack, the conductive plates are usually soldered to the surface of the circuit board. Therefore, the connection points between the circuit board and the busbars are easily exposed on the outside of the conductive plates. In operating scenarios, such as during vehicle vibrations, the conductive plates connected to the current input terminals are prone to contact with the connection points between the circuit board and the busbars due to external forces. This can lead to poor contact or short circuits, and in severe cases, burn out the circuit board, affecting the normal power supply of the battery pack. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems by designing a circuit board assembly mounting structure, which solves the problem that short circuits are caused by the connection between the circuit board and the busbar easily coming into contact with the conductive plate.

[0005] The technical solution of this utility model to achieve the above objectives is a circuit board assembly mounting structure, comprising:

[0006] A circuit board, wherein connecting pieces are respectively provided on both sides near the positive and negative terminals of the battery cell, and the circuit board has an input terminal and an output terminal;

[0007] An insulating board, wherein the circuit board is mounted on the front side of the insulating board, and a connecting piece on at least one side of the circuit board can be inserted into the back side of the insulating board;

[0008] A busbar, which is electrically connected to the positive or negative terminal of at least a portion of the battery cells, and a connecting piece for electrically connecting the busbar to the circuit board;

[0009] A current input conductive plate is attached to the circuit board and electrically connected to the input terminal of the circuit board. The current input conductive plate is isolated from the connecting piece by the insulating plate.

[0010] Preferably, the connecting piece is welded and fixed to the back of the circuit board and electrically connected to the circuit board.

[0011] Preferably, the connecting piece is welded to the busbar.

[0012] Preferably, the insulating plate has clearance holes to facilitate the insertion of the connecting piece into the back of the insulating plate.

[0013] Preferably, the back of the insulating plate is provided with a clearance groove extending to the location of the clearance hole.

[0014] Preferably, a positioning portion is formed on the side edge of the insulating plate near the current input conductive plate, and the positioning portion is used to position the current input conductive plate.

[0015] Preferably, it also includes a current output conductive plate, which is attached to the circuit board and electrically connected to the output terminal of the circuit board.

[0016] Preferably, the insulating plate is provided with a plurality of positioning posts, each positioning post having a threaded hole, the circuit board having a plurality of positioning holes corresponding to the positioning posts, the current input conductive plate and the current output conductive plate having mounting holes corresponding to the positioning posts, the positioning posts being able to pass through the positioning holes and the current input conductive plate and the current output conductive plate being fixed by screws.

[0017] Its advantages over existing technologies are:

[0018] In this invention, the circuit board is mounted on an insulating board. The two sides of the circuit board are connected to the busbars corresponding to the positive and negative terminals of the battery cell via connecting tabs. The connecting tab near the current input conductive plate is inserted through the back of the insulating board and then connected to the busbar. The insulating board isolates the current input conductive plate and the connecting tab from each other, preventing them from coming into contact during working conditions such as when a car is bumpy. This avoids problems such as poor contact or short circuits, ensures the normal operation of the circuit board, and thus improves the safety of the battery pack. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the installation structure of the large capacitor fixing device on the circuit board in this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the large capacitor fixing device on the circuit board in this utility model when it is combined with the circuit board;

[0021] Figure 3 This is a structural diagram of the fixed base;

[0022] Figure 4 This is a schematic diagram of the bottom structure of the mounting base;

[0023] Figure 5 This is a schematic diagram of the insulating board structure;

[0024] Figure 6 This is a structural schematic diagram of the insulating board from another perspective.

[0025] In the diagram, 1 is the circuit board; 11 is the MOSFET; 2 is the insulating plate; 21 is the positioning post; 22 is the platform; 221 is the positioning part; 201 is the clearance hole; 202 is the clearance groove; 3 is the busbar; 4 is the current input conductive plate; 5 is the current output conductive plate; and 6 is the connecting piece. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0027] like Figure 1 and Figure 2 As shown in the figure, this embodiment proposes a circuit board assembly mounting structure, which mainly includes components such as a circuit board 1, an insulating plate 2, a current input conductive plate 4, a current output conductive plate 5, and a busbar 3, and is used on a battery pack. The insulating plate 2 is used to isolate the battery cells (not shown in the figure) inside the battery pack from the circuit board 1.

[0028] Several cells within the battery pack are connected in series and parallel, and the current is collected through busbars 3. At least two busbars 3 are provided at each of the two poles of the cell. The current input conductive plate 4 is fixedly connected to one of the busbars 3 at one pole of the cell, while the other busbars 3 are electrically connected to the circuit board 1.

[0029] like Figure 3 , Figure 4 As shown, a row of MOSFETs 11 is soldered onto circuit board 1. Each MOSFET 11 has a row of sockets on both sides, serving as the input and output terminals of circuit board 1. The current input conductive plate 4 and the current output conductive plate 5 have one side bent to form a connecting portion, which is inserted into the socket and soldered to it. Current is transmitted to circuit board 1 through the current input conductive plate 4, flows through the MOSFETs 11, and then exits from the current output conductive plate 5, transmitting to the corresponding terminals.

[0030] refer to Figure 3 , Figure 5 The circuit board 1 is fixedly installed on the right side of the insulating plate 2, and a platform 22 is formed on the left side of the insulating plate 2. The platform 22 is used to support the current input conductive plate 4.

[0031] Multiple positioning posts 21 are formed on the right side of the circuit board 1, each with a threaded hole. Two rows of positioning holes are also formed on the circuit board 1, located on either side of the MOSFET 11, corresponding to the current input conductive plate 4 and the current output conductive plate 5, respectively. Mounting holes are formed on the current input conductive plate 4 and the current output conductive plate 5, each corresponding to a positioning hole. When mounting the circuit board 1, the positioning posts 21 pass through the positioning holes to position the circuit board 1. Then, screws are passed through the mounting holes on the conductive plates and connected to the threaded holes on the positioning posts 21, thereby fixing the current input conductive plate 4 and the current output conductive plate 5.

[0032] The left and right sides of circuit board 1 correspond to the positive and negative terminals of the battery cell, respectively. Two connecting tabs 6 are located on each side of circuit board 1. These connecting tabs 6 are soldered and fixed to circuit board 1 and are connected to the circuitry within circuit board 1. The connecting tabs 6 electrically connect portions of the busbars 3 located at the two terminals of the battery cell to circuit board 1, allowing current to flow through circuit board 1. Circuit board 1 manages the battery charging and discharging process, monitors battery status, and protects battery safety. The connecting tabs 6 are soldered to the busbars 3.

[0033] like Figure 5 As shown, in order to prevent the connecting piece 6 from contacting the conductive plate, two clearance holes 201 are opened between the area where the circuit board 1 is mounted on the insulating plate 2 and the area of ​​the left platform 22. All the connecting pieces 6 are welded and fixed to the back of the circuit board 1 (i.e. the side away from the conductive plate).

[0034] The two connecting pieces 6 on the left side of the circuit board 1 extend through the two clearance holes 201 to the back of the insulating plate 2, and then connect to the busbar 3. The insulating plate 2 isolates the current input conductive plate 4 from the connecting pieces 6, and the insulating plate 2 serves as an insulator to prevent the current input conductive plate 4 from contacting the connecting pieces 6.

[0035] refer to Figure 5 A positioning part 221 is formed on the left edge of the insulating plate 2. The positioning part 221 serves two purposes: first, to position the current input conductive plate 4, and second, to prevent the left side of the input conductive plate from contacting the connecting piece 6.

[0036] refer to Figure 6Correspondingly, two clearance grooves 202 are also provided on the left side of the back of the insulating plate 2. The two clearance grooves 202 correspond one-to-one with the two clearance holes 201, and the clearance grooves 202 extend to the positions of the clearance holes 201. The depth of the clearance grooves 202 is adapted to the thickness of the connecting piece 6. Because the connecting piece 6 has a certain thickness, after the connecting piece 6 is inserted into the back of the insulating plate 2, it will have a certain impact on the installation of the insulating plate 2, resulting in a certain gap between the insulating plate 2 and the bracket for fixing the battery cell. Therefore, the connecting piece 6 can be embedded in the clearance grooves 202, so that there will be no gap between the insulating plate 2 and the bracket for fixing the battery cell.

[0037] In this embodiment, the circuit board 1 is relatively large, so the connecting piece 6 on the right side of the circuit board 1 is offset from the current output circuit board 1, so that the current output circuit board 1 will not contact the connecting piece 6. If the circuit board 1 is too small, the connecting piece 6 on the right side of the circuit board 1 can be inserted and extended to the back of the insulating plate 2, and then connected to the busbar 3.

[0038] The above technical solution only embodies the preferred technical solution of this utility model. Any changes that may be made by those skilled in the art to certain parts of it embody the principle of this utility model and fall within the protection scope of this utility model.

Claims

1. A circuit board assembly mounting structure, characterized in that, The utility model relates to a kind of battery pack, including: Circuit board (1), the connecting sheet (6) is arranged along respectively on the two sides of the circuit board (1) close to the positive and negative poles of battery core, the circuit board (1) has input and output; Insulating plate (2), the circuit board (1) is installed on the front of the insulating plate (2), and the connecting sheet (6) of at least one side of the circuit board (1) can be inserted into the back of the insulating plate (2); Busbar (3), the busbar (3) is electrically connected with the positive pole or negative pole of at least part of battery core, and the connecting sheet (6) is used to electrically connect the busbar (3) with the circuit board (1); Current input conductive plate (4), the current input conductive plate (4) is attached on the circuit board (1) and is electrically connected with the input of the circuit board (1), and the current input conductive plate (4) is isolated from the connecting sheet (6) by the insulating plate (2).

2. The circuit board assembly mounting structure according to claim 1, wherein The connecting sheet (6) is welded and fixed on the back of the circuit board (1) and is electrically connected with the circuit board (1).

3. The circuit board assembly mounting structure according to claim 2, wherein The connecting sheet (6) is welded with the busbar (3).

4. The circuit board assembly mounting structure of claim 1, wherein The insulating plate (2) is provided with a relief hole (201) on the back of the insulating plate (2) for the connecting sheet (6) to be inserted into the back of the insulating plate (2).

5. The circuit board assembly mounting structure according to claim 4, wherein The back of the insulating plate (2) is provided with a relief groove (202) extending to the position of the relief hole (201).

6. The circuit board assembly mounting structure of claim 1, wherein The front of the insulating plate (2) is provided with a positioning portion (221) on one side edge close to the current input conductive plate (4), and the positioning portion (221) is used for positioning the current input conductive plate (4).

7. The circuit board assembly mounting structure of claim 1, wherein Further including current output conductive plate (5), the current output conductive plate (5) is attached on the circuit board (1) and is electrically connected with the output of the circuit board (1).

8. The circuit board assembly mounting structure according to claim 7, wherein The insulating plate (2) is provided with a plurality of positioning columns (21), the positioning columns (21) are provided with threaded holes, the circuit board (1) is provided with a plurality of positioning holes corresponding to the positioning columns (21), the current input conductive plate (4) and the current output conductive plate (5) are provided with mounting holes corresponding to the positioning columns (21), and the positioning columns (21) can pass through the positioning holes and fix the current input conductive plate (4) and the current output conductive plate (5) by screw.

Images