Battery pack effectively protecting a cell

Abstract

This application relates to a battery pack for effectively protecting battery cells, comprising a housing, a cover, battery cells, and a circuit protection board. The housing contains a partition, and the circuit protection board is mounted on one side of the partition. A battery bracket is located between the other side of the partition and the inner wall of the housing. Multiple battery cells are vertically arranged and mounted within the battery bracket. A test circuit PCB board is located on the top surface of the battery bracket. The test circuit PCB board and the battery bracket have multiple contact ports adapted to the electrodes at the top of the battery cells. The test circuit PCB board has multiple series contact points and a voltage test output interface. The top of the circuit protection board has a voltage test input interface. The cover has a charging plug and a discharging plug. This utility model belongs to the field of battery pack technology, integrating voltage monitoring and circuit protection functions, improving the accuracy and safety of battery cell management, preventing overcharging / over-discharging of battery cells, and extending battery life.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and in particular to a battery pack that effectively protects the battery cells. Background Technology

[0002] With the rapid development of new energy technologies, lithium-ion batteries have been widely used in electric vehicles, energy storage devices, and other fields due to their advantages such as high energy density and long cycle life. However, existing battery packs still have the following technical problems in terms of structural design, thermal management, and circuit protection: (1) Insufficient cell arrangement and space utilization. Traditional battery packs usually adopt a single-layer or simple multi-layer stacking arrangement, with large gaps between cells, resulting in a large overall volume and low energy density. (2) Poor heat dissipation performance. High-density arranged cells generate a lot of heat when working, while existing battery brackets are mostly closed structures that rely solely on external heat sinks or liquid cooling systems, resulting in low heat dissipation efficiency. (3) Maintenance is inconvenient. The cells and brackets are mostly fixed by welding or gluing. When a single cell is damaged, the entire battery pack needs to be disassembled, resulting in high maintenance costs. Therefore, there is an urgent need for a comprehensive and optimized battery pack design. Utility Model Content

[0003] Therefore, it is necessary to provide a battery pack that effectively protects the battery cells, and the specific technical solution is as follows.

[0004] A battery pack for effectively protecting battery cells includes a housing, a cover, battery cells, and a circuit protection board. The housing contains a partition, and the circuit protection board is mounted on one side of the partition. A battery bracket is located between the other side of the partition and the inner wall of the housing. Multiple battery cells are vertically arranged and mounted within the battery bracket. A test circuit PCB board is located on the top surface of the battery bracket. The test circuit PCB board and the battery bracket have multiple contact ports adapted to the electrodes at the top of the battery cells. The test circuit PCB board has multiple series connectors that connect the multiple battery cells in series. The test circuit PCB board also has a voltage test output interface that can be electrically connected to each of the series connectors. The top of the circuit protection board has a voltage test input interface. The cover has a charging plug and a discharging plug.

[0005] Furthermore, the battery bracket includes an upper positioning seat and a lower positioning seat. Multiple positioning cylinders are provided at the adjacent ends of the upper and lower positioning seats. The battery cell is installed in the positioning cylinder. The multiple positioning cylinders are arranged in multiple rows, and each row has multiple positioning cylinders arranged at even intervals. The positioning cylinders in adjacent rows are staggered.

[0006] Furthermore, a heat dissipation groove is provided between two adjacent positioning cylinders in the same row.

[0007] Furthermore, the bottom of the upper positioning seat is provided with an upper connecting column, and the top of the lower positioning seat is provided with a lower connecting column that is connected to the upper connecting column by a bolt structure.

[0008] Furthermore, a plastic pad is provided between the upper and lower positioning seats and the inner wall of the box body and the box cover.

[0009] Furthermore, the top surface of the upper positioning seat is provided with a positioning groove, the test circuit PCB board is installed in the positioning groove, and the groove wall of the positioning groove is provided with a buckle that can be elastically deformed.

[0010] Furthermore, multiple series-connected terminals are arranged in a maze-like pattern on the test circuit PCB board. A support portion for supporting the series-connected terminals is provided between two adjacent terminals on the test circuit PCB board. The test circuit PCB board is provided with copper-plated wires that electrically connect each support portion to the voltage test output interface. Each support portion is connected by a copper-plated wire. The series-connected terminal includes a mounting plate connected to the support portion and L-shaped terminals located at both ends of the mounting plate that are connected to the positive and negative terminals at the top of the battery cell.

[0011] Furthermore, the upper positioning seat has two protrusions at one end near the circuit protection board. A positive terminal plate and a negative terminal plate are installed on the two protrusions by bolts. The positive terminal plate and the negative terminal plate are electrically connected to the charging plug, the discharging plug and the circuit protection board by wires.

[0012] Furthermore, an L-shaped mounting plate is provided on the side of the partition, and mounting terminals are provided on the vertical plate of the L-shaped mounting plate. The circuit protection board is fixed to the mounting terminals by bolts, and the horizontal plate at the top of the L-shaped mounting plate is fixed to the top surface of the partition by bolts.

[0013] Furthermore, an insulating cover is provided above the PCB board of the test circuit, and a plastic pressure plate is provided between the insulating cover and the top wall of the box cover.

[0014] Compared with existing technologies, this utility model has the following beneficial effects: (1) Integrated design, test PCB board and protection board work together to improve monitoring efficiency; (2) Space optimization: staggered arrangement of battery cells and three-dimensional installation structure such as L-shaped plate improve space utilization; (3) Enhanced safety with multiple protective designs including heat dissipation grooves, plastic pads, and insulating covers; (4) Easy to maintain, modular brackets and bolt connections make disassembly and replacement easy. Attached Figure Description

[0015] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of the structure and assembly of the battery pack that effectively protects the battery cells according to this utility model. Figure 2 This is a schematic diagram of the internal structure of a battery pack that effectively protects the battery cells according to this utility model. Figure 3 This is a top view of the internal structure of the battery pack that effectively protects the battery cells according to this utility model. Figure 4 This is an enlarged schematic diagram of the structural assembly of the upper positioning frame, the test circuit PCB board, and the battery cell in this utility model; Figure 5 This is an enlarged schematic diagram of the structural assembly of the upper positioning frame and the test circuit PCB board in this utility model.

[0017] Explanation of reference numerals in the attached diagram: 1. Housing; 2. Cover; 3. Battery cell; 4. Circuit protection board; 5. Partition; 6. Battery bracket; 7. Test circuit PCB board; 8. Power connector; 9. Series connector; 10. Voltage test output interface; 11. Voltage test input interface; 12. Charging plug; 13. Discharging plug; 14. Upper positioning seat; 15. Lower positioning seat; 16. Positioning cylinder; 17. Heat dissipation groove; 18. Upper connecting post; 19. Lower connecting post; 20. Plastic pad; 21. Positioning groove; 22. Buckle; 23. Support part; 24. Boss; 25. Positive terminal plate; 26. Negative terminal plate; 27. L-shaped mounting plate; 28. Insulating cover plate; 29. ​​Plastic pressure plate. Detailed Implementation

[0018] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0019] The embodiments of this utility model will be described below based on its overall structure.

[0020] Reference Figures 1-5As shown, this embodiment provides a battery pack that effectively protects the battery cells, including a housing 1, a cover 2, battery cells 3, and a circuit protection board 4. The housing 1 has a partition 5 inside, and the circuit protection board 4 is mounted on one side of the partition 5. A battery bracket 6 is provided between the other side of the partition 5 and the inner wall of the housing 1. Multiple battery cells 3 are vertically arranged and mounted within the battery bracket 6. A test circuit PCB board 7 is provided on the top surface of the battery bracket 6. The test circuit PCB board 7 and the battery bracket 6 have multiple contact ports 8 adapted to the electrodes at the top of the battery cells 3. The test circuit PCB board 7 has multiple series connectors 9 that connect multiple battery cells 3 in series. The test circuit PCB board 7 has a voltage test output interface 10 that can be electrically connected to each of the series connectors 9. The top of the circuit protection board 4 has a voltage test input interface 11 adapted to the voltage test output interface 10. The cover 2 has a charging plug 12 and a discharging plug 13 that are electrically connected to the circuit protection board 4 and the battery cells 3. The battery pack of this utility model includes a housing 1, a cover 2, battery cells 3, a circuit protection board 4, a partition 5, a battery bracket 6, a test circuit PCB board 7, a power interface 8, a series connector 9, a voltage test output interface 10, a voltage test input interface 11, a charging plug 12, and a discharging plug 13. The battery cells 3 are vertically installed in the battery bracket 6 and connected in series through the series connector 9. The test circuit PCB board 7 monitors the voltage of the battery cells in real time and transmits it to the circuit protection board 4 for protection control through the voltage test output interface 10. The charging plug 12 and the discharging plug 13 are connected to the battery cells 3 through the circuit protection board 4 to achieve safe charging and discharging. During charging, the current flows through the charging plug 12 → circuit protection board 4 → battery cell 3; during discharging, the current is output in reverse to the discharging plug 13. The test circuit PCB board 7 collects the voltage of each battery cell through the series connector 9, and feeds it back to the circuit protection board 4 through the voltage test output interface 10 to achieve overvoltage / undervoltage protection. This battery pack integrates voltage monitoring and circuit protection functions, improving the accuracy and safety of battery cell management, avoiding overcharging / over-discharging of the battery cells, and extending their lifespan. Moreover, it can achieve modular design and installation, which is convenient for maintenance. By integrating the test PCB board 7 and the series connector 9 to connect with the battery cell 3, the wiring complexity is reduced and the response speed is improved.

[0021] Specifically, the battery bracket 6 includes an upper positioning seat 14 and a lower positioning seat 15. Multiple positioning cylinders 16 are provided at their adjacent ends. The battery cell 3 is installed within each positioning cylinder 16. The multiple positioning cylinders 16 are arranged in multiple rows, with each row having multiple evenly spaced positioning cylinders 16. Adjacent rows of positioning cylinders 16 are staggered. In this embodiment, the battery cell 3 is inserted into the positioning cylinder 16. The staggered arrangement optimizes space utilization. The battery cell 3 is vertically fixed from the positioning cylinders 16 of the upper and lower positioning seats 14 and 15. The staggered arrangement of adjacent rows avoids interference, increases the battery cell density, enhances structural stability, saves space with its compact layout, and facilitates heat dissipation.

[0022] Specifically, a heat dissipation groove 17 is provided between two adjacent positioning cylinders 16 in the same row. The heat dissipation groove 17 forms an air circulation channel, accelerates heat dissipation, and also prevents two adjacent battery cells 3 from being too close together. This reduces the temperature of the battery cell 3 from being affected by the temperature of other battery cells 3, thus solving the heat dissipation problem of high-density battery cell arrangement; it also reduces the operating temperature of the battery cells and avoids thermal runaway. Traditional brackets do not have dedicated heat dissipation channels, but this solution achieves passive heat dissipation through the groove 17, eliminating the need for additional heat dissipation components.

[0023] Specifically, the upper positioning seat 14 has an upper connecting post 18 at its bottom, and the lower positioning seat 15 has a lower connecting post 19 at its top, which is connected to the upper connecting post 18 via a bolt structure. In this embodiment, the bolt connection ensures the alignment accuracy and mechanical strength of the upper and lower positioning seats. During assembly, the connecting posts are fastened with bolts, facilitating disassembly and maintenance, and making it easier to replace individual battery cells, thus reducing maintenance costs. Compared to traditional welded brackets that are not detachable, this solution uses a bolt connection, which offers greater flexibility.

[0024] Specifically, a plastic pad 20 is provided between the upper positioning seat 14 and the lower positioning seat 15 and the inner wall of the housing 1 and the cover 2. In this embodiment, the plastic pad 20 has the function of buffering vibration and insulation. The pad 20 absorbs the mechanical vibration during vehicle operation, protects the battery cell 3, improves shock resistance and electrical safety, and reduces damage to the battery cell caused by vibration. In the traditional solution, the battery cell is in direct contact with the outer shell. In this solution, the pad 20 achieves the dual functions of shock absorption and insulation.

[0025] Specifically, the top surface of the upper positioning seat 14 is provided with a positioning groove 21, the test circuit PCB board 7 is installed in the positioning groove 21, and the groove wall of the positioning groove 21 is provided with a buckle 22. The buckle 22 can be elastically deformed. The positioning groove 21 and the buckle 22 realize the quick installation of the test circuit PCB board 7, and then fix it to the upper positioning seat 14 with bolts.

[0026] Specifically, multiple series-connected terminals 9 are arranged in a maze-like pattern on the test circuit PCB board 7. Support portions 23 for supporting the series-connected terminals 9 are provided between adjacent power ports 8 on the test circuit PCB board 7. The test circuit PCB board 7 has copper-plated wires electrically connecting each support portion 23 to the voltage test output interface 10. Each support portion 23 is connected via a copper-plated wire. Each series-connected terminal 9 includes a mounting plate connected to the support portion 23 and L-shaped terminals located at both ends of the mounting plate, connecting to the positive and negative terminals at the top of the battery cell 3. The maze-like arrangement of the series-connected terminals 9 can shorten the wire length, reduce impedance, and decrease heat generation.

[0027] Specifically, the upper positioning base 14 has two protrusions 24 near the end where it is installed on the circuit protection board 4. A positive terminal plate 25 and a negative terminal plate 26 are installed on the two protrusions 24 by bolts. The positive terminal plate 25 and the negative terminal plate 26 are electrically connected to the charging plug 12, the discharging plug 13, and the circuit protection board 4 through wires. The protrusions 24, which install the positive terminal plate 25 and the negative terminal plate 26, simplify the layout of the high-voltage line.

[0028] Specifically, the partition 5 has an L-shaped mounting plate 27 on its side, and mounting terminals are provided on the vertical plate of the L-shaped mounting plate 27. The circuit protection board 4 is fixed to the mounting terminals by bolts, and the horizontal plate at the top of the L-shaped mounting plate 27 is fixed to the top surface of the partition 5 by bolts. The L-shaped mounting plate 27 achieves three-dimensional fixation of the protection board 4, saving lateral space.

[0029] Specifically, an insulating cover plate 28 is provided on the top of the test circuit PCB board 7, and a plastic pressure plate 29 is provided between the insulating cover plate 28 and the top wall of the box cover 2. The insulating cover plate 28 and the plastic pressure plate 29 provide double protection to prevent short circuits; the plastic pressure plate 29 also has a buffering function to prevent the battery cells and battery bracket 6 from swinging significantly.

[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above embodiments only illustrate one or more implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A battery pack effectively protecting an electric core, comprising a box body (1), a box cover (2), an electric core (3) and a circuit protection plate (4), characterized in that, The housing (1) is provided with a partition (5), the circuit protection board (4) is installed on one side of the partition (5), and the other side of the partition (5) is provided with a battery bracket (6) between it and the inner wall of the housing (1). Multiple battery cells (3) are vertically arranged and installed in the battery bracket (6). The top surface of the battery bracket (6) is provided with a test circuit PCB board (7). The test circuit PCB board (7) and the battery bracket (6) are provided with multiple power inlets (8) that are adapted to the electrodes at the top of the battery cells (3). The test circuit PCB board (7) is provided with multiple series connectors (9) that connect multiple battery cells (3) in series. The test circuit PCB board (7) is provided with a voltage test output interface (10) that can be electrically connected to each of the series connectors (9). The top of the circuit protection board (4) is provided with a voltage test input interface (11). The housing cover (2) is provided with a charging plug (12) and a discharging plug (13).

2. The battery pack effectively protecting the battery cell according to claim 1, characterized by, The battery bracket (6) includes an upper positioning seat (14) and a lower positioning seat (15). The upper positioning seat (14) and the lower positioning seat (15) are provided with multiple positioning cylinders (16) at their close ends. The battery cell (3) is installed in the positioning cylinder (16). The multiple positioning cylinders (16) are arranged in multiple rows. Each row has multiple positioning cylinders (16) arranged at even intervals. The positioning cylinders (16) in adjacent rows are staggered.

3. The battery pack effectively protecting the battery cell according to claim 2, characterized by, A heat dissipation groove (17) is provided between two adjacent positioning cylinders (16) in the same row.

4. The battery pack effectively protecting the battery cell according to claim 3, characterized by, The bottom of the upper positioning seat (14) is provided with an upper connecting column (18), and the top of the lower positioning seat (15) is provided with a lower connecting column (19) that is connected to the upper connecting column (18) by a bolt structure.

5. The battery pack effectively protecting the battery cell according to claim 2, wherein, A plastic pad (20) is provided between the upper positioning seat (14) and the lower positioning seat (15) and the inner wall of the box body (1) and the box cover (2).

6. The battery pack effectively protecting the battery cell according to any one of claims 2 to 5, characterized by, The top surface of the upper positioning seat (14) is provided with a positioning groove (21), the test circuit PCB board (7) is installed in the positioning groove (21), and the groove wall of the positioning groove (21) is provided with a buckle (22), which can be elastically deformed.

7. The battery pack effectively protecting the battery cell according to claim 6, characterized by, Multiple series-connected plates (9) are arranged in a maze-like pattern on the test circuit PCB board (7). A support part (23) supporting the series-connected plates (9) is provided between two adjacent power ports (8) on the test circuit PCB board (7). The test circuit PCB board (7) is provided with copper-plated wires that electrically connect each support part (23) to the voltage test output interface (10). Each support part (23) is connected by a copper-plated wire. The series-connected plate (9) includes a mounting plate connected to the support part (23) and L-shaped connecting plates at both ends of the mounting plate that are connected to the positive and negative poles at the top of the battery cell (3).

8. The battery pack effectively protecting the battery cell according to claim 7, characterized by, The upper positioning seat (14) has two protrusions (24) at one end near the circuit protection board (4). A positive electrode plate (25) and a negative electrode plate (26) are installed on the two protrusions (24) by bolts. The positive electrode plate (25) and the negative electrode plate (26) are electrically connected to the charging plug (12), the discharging plug (13) and the circuit protection board (4) by wires.

9. The battery pack effectively protecting the battery cell according to claim 8, characterized by, The partition (5) has an L-shaped mounting plate (27) on its side. The vertical plate of the L-shaped mounting plate (27) has mounting terminals. The circuit protection board (4) is fixed to the mounting terminals by bolts. The horizontal plate at the top of the L-shaped mounting plate (27) is fixed to the top surface of the partition (5) by bolts.

10. The battery pack effectively protecting the battery cell according to claim 9, wherein, An insulating cover plate (28) is provided above the test circuit PCB board (7), and a plastic pressure plate (29) is provided between the insulating cover plate (28) and the top wall of the box cover (2).

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