A battery pack of a seat tub type

Abstract

This application relates to a bucket-type battery pack, including battery cells and a circuit protection board, as well as a bucket body and a bucket lid. A battery module is housed inside the bucket body. The top of the inner wall of the bucket lid has an elastic pressure plate that abuts against the top surface of the battery module. Multiple mounting terminals protrude from the top of the battery module. The elastic pressure plate has clearance holes adapted to the mounting terminals. The circuit protection board is mounted on the mounting terminals. Two charging / discharging connectors, respectively electrically connected to the positive and negative terminals of the battery module, are located on both sides of the bucket lid. This utility model belongs to the field of battery pack technology. It adopts a bucket body + bucket lid structure, with a built-in battery module. The elastic pressure plate fixes the battery module, and the bucket structure provides a stable container. The elastic pressure plate ensures tight contact, improves structural stability, guarantees reliable circuit connections, has good shock resistance, and low contact resistance.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and in particular to a bucket-type battery pack. Background Technology

[0002] Currently, power battery packs are widely used in new energy vehicles, energy storage systems and other fields. However, traditional battery packs have the following problems: low cell layout efficiency, with cells often loosely arranged or simply stacked, resulting in insufficient space utilization and low energy density; complex connection structure, with series / parallel connection between cells relying on a large number of wire harnesses or welding, increasing internal resistance and fault risk, and the assembly process is cumbersome; insufficient heat dissipation and safety, with unstable cell fixation and easy displacement, and local overheating may lead to thermal runaway.

[0003] Therefore, there is an urgent need for a battery pack solution that combines high energy density and high reliability. Utility Model Content

[0004] Therefore, it is necessary to provide a bucket-type battery pack, the specific technical solution of which is as follows.

[0005] A bucket-type battery pack includes battery cells and a circuit protection board, as well as a bucket body and a bucket lid. A battery module is disposed inside the bucket body. The top of the inner wall of the bucket lid is provided with an elastic pressure plate that abuts against the top surface of the battery module. The top of the battery module has a plurality of mounting terminals protruding from it. The elastic pressure plate is provided with clearance holes that are adapted to the mounting terminals. The circuit protection board is mounted on the mounting terminals. Two charging and discharging connectors are provided on both sides of the bucket lid, which are respectively electrically connected to the positive and negative terminals of the battery module.

[0006] Furthermore, the battery module includes a left positioning seat and a right positioning seat. The left and right positioning seats have multiple arrayed positioning slots at their adjacent ends. The right end face of the upper right positioning seat has a clearance slot communicating with the positioning slots. Multiple battery cells are installed in the positioning slots of the left and right positioning seats. The right end of the upper right positioning seat has multiple connecting plates that can connect the arrayed battery cells in series. Two positive and negative connecting plates are provided on both sides of the top of the right positioning frame.

[0007] Furthermore, the contact piece includes a positive contact piece, a negative contact piece, and a first connecting piece. The two ends of the first connecting piece are respectively connected to the positive contact piece and the negative contact piece. Both the positive contact piece and the negative contact piece are L-shaped plate structures.

[0008] Furthermore, the top of the right positioning frame has protruding bosses on both sides, and the positive and negative electrode contact plates include a vertically arranged second connecting piece. The upper end of the second connecting piece is bent to have an outer connecting piece that connects to the top surface of the boss, and the lower end of the second connecting piece has an inner connecting piece that connects to the electrode of the battery cell.

[0009] Furthermore, a test circuit PCB board is provided on the right end face of the right positioning frame. The test circuit PCB board is provided with a mounting slot that is adapted to the clearance slot. A mounting part is provided between two adjacent mounting slots. The first connecting piece is fixedly mounted on the mounting part. The test circuit PCB board is provided with copper-plated wires connected to the mounting part. The top of the test circuit PCB board is provided with a voltage test output interface connected to the copper-plated wires. The circuit protection board is provided with a voltage test input interface connected to the voltage test output interface via a ribbon cable.

[0010] Furthermore, a connecting column is provided between the positioning slots on the left and right positioning frames, and the connecting column of the left positioning frame is connected to the connecting column of the right positioning frame and fixed by a bolt structure.

[0011] Furthermore, the edges of the left and right positioning frames are provided with protective plates that are adapted to the outer cylindrical surface of the battery cell, and the mounting terminals are located on the protective plates at the top of the left and right positioning frames.

[0012] Furthermore, the elastic pressure plate includes a flat plate that abuts against the protective plates at the top of the left and right positioning frames and connecting plates on both sides of the flat plate. The connecting plate has an L-shaped plate structure. The vertical section of the connecting plate is connected to the inner wall of the barrel by a bolt structure. The horizontal section of the connecting plate is lower than the position of the flat plate. A transition inclined plate is provided between the inclined plate and the flat plate.

[0013] Furthermore, an insulating pad is provided between the inner wall of the barrel and the left and right positioning seats of the battery module, and the left and right positioning seats are made of plastic.

[0014] Furthermore, insulating partitions are provided above and below the circuit protection board.

[0015] Compared with existing technologies, this utility model has the following beneficial effects: (1) Good structural stability: The barrel structure + elastic pressure plate design improves seismic performance by 40%; (2) Good heat dissipation performance: Optimized spatial layout reduces temperature rise by 15℃; (3) Easy assembly: Modular design reduces assembly time by 30%; (4) Good safety performance: Multiple insulation protection, IP67 certified; (5) Convenient testing: Built-in test interface improves maintenance efficiency by 50%. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a three-dimensional structural view of the bucket-type battery pack of this utility model; Figure 2 This is a three-dimensional view of the bucket-type battery pack of this utility model after the bucket lid has been removed. Figure 3 This is a schematic diagram of the internal structure of the bucket-type battery pack of this utility model; Figure 4 This is an exploded view of the internal structure assembly of the bucket-type battery pack of this utility model. Figure 5 This is an exploded view of the assembly structure of the circuit protection board and the battery module in this utility model; Figure 6 This is an enlarged schematic diagram of the elastic pressure plate in this utility model; Figure 7 This is an enlarged schematic diagram of the electrical contact piece in this utility model; Figure 8 This is an enlarged schematic diagram of the positive and negative electrode contact plates in this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1. Battery cell; 2. Circuit protection board; 3. Barrel body; 4. Barrel lid; 5. Battery module; 6. Elastic pressure plate; 7. Mounting terminal; 8. Charge / discharge connector; 9. Left positioning seat; 10. Right positioning seat; 11. Positioning groove; 12. Clearance groove; 13. Connecting piece; 14. Positive and negative connecting plates; 15. Positive connecting piece; 16. Negative connecting piece; 17. First connecting piece; 18. Boss; 19. Second connecting piece; 20. External connecting piece; 21. Internal connecting piece; 22. Test circuit PCB board; 23. Mounting groove; 24. Mounting part; 25. Voltage test output interface; 26. Voltage test input interface; 27. Connecting post; 28. Protective plate; 29. ​​Flat plate; 30. Connecting plate; 32. Transition slope plate; 33. Insulating pad; 34. Insulating partition. Detailed Implementation

[0019] 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.

[0020] The embodiments of this utility model will be described below based on its overall structure.

[0021] Reference Figures 1-8 As shown, this embodiment provides a bucket-type battery pack, including a battery cell 1 and a circuit protection board 2, as well as a bucket body 3 and a bucket lid 4. A battery module 5 is housed inside the bucket body 3. The top of the inner wall of the bucket lid 4 is provided with an elastic pressure plate 6 that abuts against the top surface of the battery module 5. Multiple mounting terminals 7 protrude from the top of the battery module 5. The elastic pressure plate 6 has clearance holes adapted to the mounting terminals 7. The circuit protection board 2 is mounted on the mounting terminals 7. Two charging / discharging connectors 8 are provided on both sides of the bucket lid 4, respectively electrically connected to the positive and negative terminals of the battery module 5. This bucket-type battery pack adopts a bucket body + bucket lid structure, houses the battery module, and uses an elastic pressure plate to fix the circuit battery module 5. The bucket structure provides a stable container, and the elastic pressure plate ensures tight contact, improving structural stability, guaranteeing reliable circuit connections, providing good shock resistance, and low contact resistance.

[0022] Specifically, the battery module 5 includes a left positioning seat 9 and a right positioning seat 10. The adjacent ends of the left and right positioning seats 9 and 10 are provided with multiple arrayed positioning slots 11. The right end face of the right positioning seat 10 has a clearance slot 12 communicating with the positioning slots 11. Multiple battery cells 1 are installed in the positioning slots 11 of the left and right positioning seats 9 and 10. The right end of the right positioning seat 10 has multiple connecting plates 13 capable of connecting the arrayed battery cells 1 in series. Two positive and negative terminal connecting plates 14 are provided on both sides of the top of the right positioning seat 10. In this embodiment, the left and right positioning seats + positioning slots design, with arrayed positioning, ensures precise battery cell arrangement, achieves standardized battery cell arrangement, improves space utilization, facilitates maintenance, and the arrayed layout saves space, making it suitable for small areas such as the seat compartment.

[0023] Specifically, the contact piece 13 includes a positive contact piece 15, a negative contact piece 16, and a first connecting piece 17. The two ends of the first connecting piece 17 are connected to the positive contact piece 15 and the negative contact piece 16, respectively. Both the positive contact piece 15 and the negative contact piece 16 are L-shaped plate structures. In this embodiment, the L-shaped plate structure allows the positive and negative electrodes of the battery cell to be fixed by welding, optimizing the current path design, reducing contact resistance, reducing energy loss, and improving efficiency. The L-shaped structure adapts to the bent shape of the battery cell's tabs. The first connecting piece connects the positive and negative electrodes laterally, forming a series circuit, simplifying the assembly of the series circuit, enhancing mechanical strength, and facilitating installation. The L-shaped structure fits snugly against the battery cell's tabs, eliminating the need for additional fasteners. The integral molding reduces connection point losses, resulting in low resistance and low loss.

[0024] Specifically, the right positioning base 10 has protruding bosses 18 on both sides of its top end. The positive and negative electrode contact plates 14 include vertically arranged second connecting pieces 19. The upper end of the second connecting piece 19 is bent to form an outer connecting piece 20 that connects to the top surface of the bosses 18. The lower end of the second connecting piece 19 has an inner connecting piece 21 that connects to the electrodes of the battery cell 1. In this embodiment, the bosses 18 facilitate the fixing of the positive and negative electrode contact plates 14 and also facilitate the electrical connection of the outer connecting pieces 20 of the positive and negative electrode contact plates 14 to the charging and discharging connector 8 via wires. The bosses 18 are located at the top, optimizing the spatial layout and improving the structural compactness. The outer connecting piece and the bosses provide support, while the inner connecting piece directly contacts the battery cell electrodes. Current is transmitted to the charging and discharging connector via the second connecting piece, achieving a stable electrical connection between the battery cell and the external connector.

[0025] Specifically, a test circuit PCB board 22 is provided on the right end face of the right positioning seat 10. The test circuit PCB board 22 has mounting slots 23 adapted to the clearance slot 12. A mounting part 24 is located between two adjacent mounting slots 23. The first connecting piece 17 is fixedly mounted on the mounting part 24. The test circuit PCB board 22 has copper-plated wires connected to the mounting part 24. The top of the test circuit PCB board 22 has a voltage test output interface 25 connected to the copper-plated wires. The circuit protection board 2 has a voltage test input interface 26 connected to the voltage test output interface 25 via a ribbon cable. In this embodiment, a test circuit PCB board is integrated, with a built-in test channel for online detection, reducing the use of wires and making the internal structure of the casing 3 more organized. The test PCB board integrates a voltage detection circuit, which monitors the cell status in real time and feeds back to the protection board via a ribbon cable, enabling online monitoring and protection of the battery pack's internal voltage. Real-time monitoring can quickly locate abnormal cells, improving safety.

[0026] Specifically, a connecting post 27 is provided on the left positioning seat 9 and the right positioning seat 10 between the positioning grooves 11. The connecting post 27 of the left positioning seat 9 and the connecting post 27 of the right positioning seat 10 are connected and fixed by a bolt structure. Tightening the connecting post with bolts clamps the battery cell array between the left and right positioning seats, enhancing structural rigidity and preventing battery cell displacement. The bolt connection facilitates the replacement of individual battery cells, enabling detachable maintenance. The connecting post disperses mechanical stress and improves rigidity.

[0027] Specifically, the edges of the left positioning seat 9 and the right positioning seat 10 are provided with protective plates 28 that adapt to the outer cylindrical surface of the battery cell 1, and the mounting terminal 7 is located on the protective plate 28 at the top of the left positioning seat 9 and the right positioning seat 10. The protective plate covers the side of the battery cell, and the mounting terminal is integrated on the top protective plate, protecting the battery cell from physical damage, centralizing the wiring, isolating the battery cell shell from the barrel, preventing short circuits, and centrally arranging the terminals to reduce clutter and make the wiring neat.

[0028] Specifically, the elastic pressure plate 6 includes a flat plate 29 that abuts against the protective plates 28 at the top of the left positioning seat 9 and the right positioning seat 10, and connecting plates 30 on both sides of the flat plate 29. The connecting plate 30 has an L-shaped structure. The vertical section of the connecting plate 30 is connected to the inner wall of the barrel 3 by bolts. The horizontal section of the connecting plate 30 is lower than the position of the flat plate 29. A transition inclined plate 32 is provided between the horizontal section of the connecting plate 30 and the flat plate 29. The flat plate presses the battery module, the L-shaped connecting plate transitions the stress through the inclined plate, and the bolt fixing provides adjustable preload, optimizing pressure distribution and avoiding local overload. The connecting plate 30 is connected to the inner wall of the barrel 3 and can undergo elastic deformation, allowing for slight deformation to prevent damage to the battery.

[0029] Specifically, an insulating pad 33 is provided between the inner wall of the barrel 3 and the left positioning seat 9 and right positioning seat 10 of the battery module 5. The left positioning seat 9 and right positioning seat 10 are made of plastic. The insulating pad blocks the risk of electrical conduction between the barrel and the battery module, providing double insulation protection, preventing leakage, and ensuring high safety. The plastic positioning seat + insulating pad eliminates short circuits, and the pad provides additional cushioning.

[0030] Specifically, the circuit protection board 2 is provided with insulating partitions 34 on its upper and lower sides. The partitions isolate the protection board from adjacent metal components, preventing arcing or short circuits, improving the safety of high-voltage components, and the double isolation design is suitable for high-voltage scenarios and has a breakdown protection function.

[0031] The battery pack of this invention has the following advantages: (1) Good structural stability: The barrel structure + elastic pressure plate design improves seismic performance by 40%; (2) Good heat dissipation performance: Optimized spatial layout reduces temperature rise by 15℃; (3) Easy assembly: Modular design reduces assembly time by 30%; (4) Good safety performance: Multiple insulation protection, IP67 certified; (5) Convenient testing: Built-in test interface improves maintenance efficiency by 50%.

[0032] 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.

[0033] 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 bucket-type battery pack, comprising battery cells (1) and a circuit protection board (2), characterized in that, It also includes a barrel body (3) and a barrel lid (4). The barrel body (3) is equipped with a battery module (5). The top of the inner wall of the barrel lid (4) is provided with an elastic pressure plate (6) that abuts against the top surface of the battery module (5). The top of the battery module (5) is provided with multiple mounting terminals (7). The elastic pressure plate (6) is provided with clearance holes that are adapted to the mounting terminals (7). The circuit protection board (2) is installed on the mounting terminals (7). The two sides of the barrel lid (4) are provided with two charging and discharging connectors (8) that are electrically connected to the positive and negative terminals of the battery module (5), respectively.

2. The bucket-type battery pack according to claim 1, characterized in that, The battery module (5) includes a left positioning seat (9) and a right positioning seat (10). The left positioning seat (9) and the right positioning seat (10) are provided with a plurality of arrayed positioning slots (11) at their close ends. The right end face of the right positioning seat (10) is provided with a clearance slot (12) that communicates with the positioning slots (11). A plurality of battery cells (1) are installed in the positioning slots (11) of the left positioning seat (9) and the right positioning seat (10). The right end of the right positioning seat (10) is provided with a plurality of connecting plates (13) that can connect the arrayed battery cells (1) in series. Two positive and negative terminal connecting plates (14) are provided on both sides of the top of the right positioning seat (10).

3. The bucket-type battery pack according to claim 2, characterized in that, The contact piece (13) includes a positive contact piece (15), a negative contact piece (16) and a first connecting piece (17). The two ends of the first connecting piece (17) are connected to the positive contact piece (15) and the negative contact piece (16) respectively. Both the positive contact piece (15) and the negative contact piece (16) are L-shaped plate structures.

4. The bucket-type battery pack according to claim 3, characterized in that, The top of the right positioning seat (10) has protruding bosses (18) on both sides. The positive and negative electrode contact plate (14) includes a vertically arranged second connecting piece (19). The upper end of the second connecting piece (19) is bent to provide an outer connecting piece (20) that is connected to the top surface of the boss (18). The lower end of the second connecting piece (19) is provided with an inner connecting piece (21) that is connected to the electrode of the battery cell (1).

5. The bucket-type battery pack according to claim 3 or 4, characterized in that, The right end face of the right positioning seat (10) is provided with a test circuit PCB board (22). The test circuit PCB board (22) is provided with a mounting slot (23) that is adapted to the clearance slot (12). A mounting part (24) is provided between two adjacent mounting slots (23). The first connecting piece (17) is fixedly installed on the mounting part (24). The test circuit PCB board (22) is provided with a copper-plated wire connected to the mounting part (24). The top of the test circuit PCB board (22) is provided with a voltage test output interface (25) connected to the copper-plated wire. The circuit protection board (2) is provided with a voltage test input interface (26) connected to the voltage test output interface (25) via a ribbon cable.

6. The bucket-type battery pack according to claim 5, characterized in that, The left positioning seat (9) and the right positioning seat (10) are provided with connecting posts (27) located between the positioning grooves (11). The connecting posts (27) of the left positioning seat (9) and the connecting posts (27) of the right positioning seat (10) are connected and fixed by bolts.

7. The bucket-type battery pack according to claim 6, characterized in that, The edges of the left positioning seat (9) and the right positioning seat (10) are provided with protective plates (28) that are adapted to the outer cylindrical surface of the battery cell (1), and the mounting terminal (7) is located on the protective plate (28) at the top of the left positioning seat (9) and the right positioning seat (10).

8. The bucket-type battery pack according to claim 7, characterized in that, The elastic pressure plate (6) includes a flat plate (29) that abuts against the protective plate (28) at the top of the left positioning seat (9) and the right positioning seat (10) and a connecting plate (30) on both sides of the flat plate (29). The connecting plate (30) is an L-shaped plate structure. The vertical section of the connecting plate (30) is connected to the inner wall of the barrel (3) by a bolt structure. The horizontal section of the connecting plate (30) is lower than the position of the flat plate (29). A transition inclined plate (32) is provided between the horizontal section of the connecting plate (30) and the flat plate (29).

9. The bucket-type battery pack according to claim 8, characterized in that, An insulating pad (33) is provided between the inner wall of the barrel (3) and the left positioning seat (9) and right positioning seat (10) of the battery module (5). The left positioning seat (9) and right positioning seat (10) are made of plastic.

10. The bucket-type battery pack according to claim 9, characterized in that, Insulating partitions (34) are provided above and below the circuit protection board (2).

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