A power battery with adjustable thickness side support plate

Abstract

The utility model discloses a kind of power battery with adjustable thickness side support plate, including battery cell module, box, box cover and battery control system;The inner side wall of box is provided with side plate, and battery cell module is assembled in the box by lateral support through side plate;The side plate is the structure with adjustable thickness, and it is closely abutted to the side of battery cell module by adjusting plate body thickness, to realize the transverse constraint of battery cell module;The top frame is provided in the bottom of box cover, and when box cover is closed on the box, the top frame is pressed down and acts on battery cell module, to realize the vertical constraint of battery cell module.The utility model eliminates transverse assembly gap by side plate thickness adjustment, and solves the displacement risk caused by vibration of battery cell module by top frame pressing down and vertical limiting.

Description

Technical Field

[0001] This utility model belongs to the field of power battery technology, and in particular relates to a power battery with an adjustable thickness side support plate. Background Technology

[0002] Battery cell modules are typically assembled directly into the casing, with lateral support structures often consisting of fixed-thickness side plates. This fixed-side-plate assembly method introduces minute gaps in the lateral direction, potentially causing the cell modules to wobble or shift within the casing. On one hand, during battery manufacturing, transportation, and use, loosening of the cell modules can lead to unstable internal electrical connections, affecting battery performance and lifespan. On the other hand, insecurely secured cell modules can reduce battery safety; under conditions of vehicle vibration, collisions with the cell modules could trigger short circuits, fires, and other serious safety incidents. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a power battery with an adjustable thickness side support plate. The side plate thickness adjustment eliminates the lateral assembly gap, and the top frame presses down to limit the vertical positioning, thus solving the risk of displacement of the cell module caused by vibration.

[0004] Technical Solution: To achieve the above objectives, this utility model provides a power battery with an adjustable thickness side support plate, comprising a cell module, a housing, a housing cover, and a battery control system; the inner wall of the housing is provided with a side plate, and the cell module is laterally supported and assembled in the housing through the side plate; the side plate has an adjustable thickness structure, which, by adjusting the thickness of the plate, tightly abuts against the side of the cell module to achieve lateral constraint on the cell module; the bottom of the housing cover is provided with a top frame, and when the housing cover is closed on the housing, the top frame presses down on the cell module to achieve vertical constraint on the cell module.

[0005] Furthermore, when the lid is closed, a heat dissipation gap is formed between its bottom and the top of the battery cell module, and the battery control system is located within the heat dissipation gap.

[0006] Furthermore, the battery control system is fixedly installed on the top frame.

[0007] Furthermore, the side panel includes a fixed base plate, a movable pressure plate, and a thickness adjustment mechanism; the fixed base plate is fixed to the inner side wall of the housing; the movable pressure plate is connected to the fixed base plate through the thickness adjustment mechanism; the thickness adjustment mechanism drives the movable pressure plate to move laterally relative to the fixed base plate to continuously adjust the thickness of the side panel.

[0008] Furthermore, the fixed substrate has an opening facing the cavity of the battery cell module, and the movable pressure plate is slidably disposed within the cavity.

[0009] Furthermore, the thickness adjustment mechanism includes a screw, a slider, a guide rail, and a push-pull rod; the screw is vertically arranged, with its two ends rotatably connected to a fixed base plate; the slider is threadedly engaged with the screw; the guide rail is vertically mounted on the fixed base plate, and the slider is slidably connected to the guide rail; the push-pull rod is inclined, with its two ends respectively hinged to the slider and the movable pressure plate; rotating the screw drives the slider to rise and fall, and the push-pull rod pushes the movable pressure plate to move laterally.

[0010] Furthermore, the top of the screw is provided with an internal hexagonal operating hole for external tools to rotate the screw.

[0011] Furthermore, the movable pressure plate has a hole on its surface, and a pressure detection component, including an elastic element and a pressure sensor, is installed in the hole; one end of the elastic element abuts against the movable pressure plate, and the other end extends out of the hole to contact the side of the battery cell module; the pressure sensor is set between the abutting surfaces of the elastic element and the movable pressure plate, and is used to detect the pressure on the elastic element to provide feedback on the lateral constraint force.

[0012] Beneficial effects: This utility model eliminates the lateral assembly gap by adjusting the thickness of the side plate 5, and solves the risk of displacement of the battery cell module caused by vibration by pressing down the top frame for vertical limiting. The adjustable thickness of the side plate can adapt to the dimensional tolerance and expansion deformation of the battery cell, avoiding overvoltage damage or gap noise. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the power battery.

[0014] Figure 2 This is an exploded view of the power battery structure.

[0015] Figure 3 This is a partial structural diagram of a power battery in its cut-out state.

[0016] Figure 4 This is a structural diagram showing the cut-out of the box body and side panels. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figure 1 and Figure 2As shown, a power battery with an adjustable-thickness side support plate includes a cell module 1, a housing 2, a housing cover 3, and a battery control system 4. The inner wall of the housing 2 is provided with a side plate 5, through which the cell module 1 is laterally supported and assembled within the housing 2. The side plate 5 has an adjustable thickness, allowing it to tightly abut against the side of the cell module 1 by adjusting its thickness, thus achieving lateral constraint on the cell module 1. A top bracket 6 is provided at the bottom of the housing cover 3. When the housing cover 3 is closed on the housing 2, the top bracket 6 presses down on the cell module 1, achieving vertical constraint on the cell module 1. This invention eliminates lateral assembly gaps by adjusting the thickness of the side plate 5 and provides vertical limiting by pressing down on the top bracket 6, thus addressing the risk of displacement of the cell module 1 due to vibration. The adjustable side plate thickness adapts to cell dimensional tolerances and expansion deformation, avoiding overvoltage damage or gap noise.

[0019] During the assembly of the power battery, an adjustable-thickness side plate 5 is used to flexibly adjust its thickness, thus adapting to the gap between the cell module 1 and the inner wall of the housing 2. This ensures a tight fit between the cell module 5 and its side, solving the problem of slight lateral gaps inherent in existing fixed-thickness side plate support methods. This provides more reliable lateral constraint, preventing lateral swaying and displacement of the cell module 1 during battery operation, and improving battery stability and safety. Simultaneously, when the housing cover 3 is closed, the top frame 6 presses down on the cell module 1, creating a vertical constraint. This further enhances the fixation of the cell module 1 within the housing, preventing vertical loosening and ensuring the compactness and reliability of the overall battery structure, effectively guaranteeing the battery's normal performance and lifespan.

[0020] like Figure 2 As shown, when the cover 3 is closed, a heat dissipation gap 31 is formed between its bottom and the top of the cell module 1, and the battery control system 4 is disposed within the heat dissipation gap 31. Furthermore, the top frame 6 serves as a rigid load-bearing structure, and the battery control system 4 is fixedly mounted on the top frame 6. By utilizing the space between the casing 2 and the cell module 1, the battery control system 4 can be rationally arranged. Simultaneously, the heat dissipation gap 31 facilitates the dissipation of heat generated by the battery during operation, preventing the battery control system 4 from malfunctioning due to overheating. This improves the overall heat dissipation performance of the battery and the reliability of the battery control system, ensuring that the battery can operate in a suitable temperature environment and extending the service life of the battery and control system.

[0021] like Figure 3 and Figure 4As shown, the side plate 5 includes a fixed base plate 8, a movable pressure plate 9, and a thickness adjustment mechanism 10; the fixed base plate 8 is fixed to the inner side wall of the housing 2; the movable pressure plate 9 is connected to the fixed base plate 8 through the thickness adjustment mechanism 10; the thickness adjustment mechanism 10 drives the movable pressure plate 9 to move laterally relative to the fixed base plate 8 to continuously adjust the thickness of the side plate 5, accurately control the lateral clamping force on the battery cell module 1, and compensate for the cyclic expansion of the battery cell without disassembling the module.

[0022] The fixed substrate 8 has a cavity 8a with an opening facing the cell module 1, and the movable pressure plate 9 is slidably disposed within the cavity 8a. The cavity 8a constrains the movable pressure plate 9 to move laterally, ensuring that the movable pressure plate 9 can accurately fit the side of the cell module 1, preventing uneven force on the cell due to off-center loading, thereby providing uniform and stable lateral support force and improving the overall assembly accuracy and reliability of the battery.

[0023] More specifically, the thickness adjustment mechanism 10 includes a screw 11, a slider 12, a guide rail 13, and a push-pull rod 14. The screw 11 is vertically arranged, with both ends rotatably connected to the fixed base plate 8. The slider 12 is threadedly engaged with the screw 11. The guide rail 13 is vertically mounted on the fixed base plate 8, and the slider 12 is slidably connected to the guide rail 13. The push-pull rod 14 is inclined, with both ends hinged to the slider 12 and the movable pressure plate 9, respectively. Rotating the screw 11 drives the slider 12 to rise and fall, and the push-pull rod 14 pushes the movable pressure plate 9 to move laterally. The screw mechanism converts rotational torque into linear thrust, outputting high lateral pressure with light operating force, achieving force amplification transmission. Moreover, the threaded engagement maintains a constant position under vibration, eliminating the need for additional locking components and achieving self-locking and anti-loosening.

[0024] The top end of the screw 11 is provided with an internal hexagonal operating hole 11a, which is used for external tools to rotate the screw 11, supporting quick adjustment, improving assembly speed and reducing maintenance costs.

[0025] The movable pressure plate 9 has a hole 9a on its surface, and a pressure detection component 15, including an elastic element and a pressure sensor, is installed inside the hole 9a. One end of the elastic element abuts against the movable pressure plate 9, and the other end extends out of the hole 9a to contact the side of the cell module 1. The pressure sensor is located between the contact surface of the elastic element and the movable pressure plate 9 to detect the pressure on the elastic element and provide feedback on the lateral constraint force. This enables real-time monitoring of the lateral constraint force of the cell module, accurately acquiring the lateral pressure experienced by the cell module during battery operation. This allows for timely adjustment of the side plate thickness or implementation of corresponding control measures based on actual needs, ensuring that the cell module is always in an optimal stress state. Simultaneously, the side plates 5 are distributed around the cell module 1. During initial assembly, the detection by each pressure detection component 15 ensures that the lateral constraint forces on the two length sides and the two width sides of the cell module 1 are the same, improving the assembly quality and accuracy of the side plate support and increasing the yield rate.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A power battery with an adjustable thickness side support plate, characterized in that: The system includes a battery cell module (1), a housing (2), a housing cover (3), and a battery control system (4). The inner wall of the housing (2) is provided with a side plate (5), and the battery cell module (1) is laterally supported and assembled in the housing (2) through the side plate (5). The side plate (5) has an adjustable thickness structure, which can be adjusted to closely abut against the side of the battery cell module (1) to achieve lateral constraint on the battery cell module (1). The bottom of the housing cover (3) is provided with a top frame (6). When the housing cover (3) is closed on the housing (2), the top frame (6) presses down on the battery cell module (1) to achieve vertical constraint on the battery cell module (1).

2. A power battery with an adjustable thickness side support plate according to claim 1, characterized in that: When the cover (3) is closed, a heat dissipation gap (31) is formed between its bottom and the top of the cell module (1), and the battery control system (4) is located in the heat dissipation gap (31).

3. A power battery with an adjustable thickness side support plate according to claim 1 or 2, characterized in that: The battery control system (4) is fixedly installed on the top frame (6).

4. A power battery with an adjustable thickness side support plate according to claim 1, characterized in that: The side plate (5) includes a fixed base plate (8), a movable pressure plate (9), and a thickness adjustment mechanism (10); the fixed base plate (8) is fixed to the inner side wall of the housing (2); the movable pressure plate (9) is connected to the fixed base plate (8) through the thickness adjustment mechanism (10); the thickness adjustment mechanism (10) drives the movable pressure plate (9) to move laterally relative to the fixed base plate (8) to continuously adjust the thickness of the side plate (5).

5. A power battery with an adjustable thickness side support plate according to claim 4, characterized in that: The fixed substrate (8) has a cavity (8a) with an opening facing the cell module (1), and the movable pressure plate (9) is slidably disposed in the cavity (8a).

6. A power battery with an adjustable thickness side support plate according to claim 5, characterized in that: The thickness adjustment mechanism (10) includes a screw (11), a slider (12), a guide rail (13), and a push-pull rod (14); the screw (11) is vertically arranged and its two ends are rotatably connected to the fixed base plate (8); the slider (12) is threadedly engaged with the screw (11); the guide rail (13) is vertically installed on the fixed base plate (8), and the slider (12) is slidably connected to the guide rail (13); the push-pull rod (14) is inclined and its two ends are respectively hinged to the slider (12) and the movable pressure plate (9); rotating the screw (11) drives the slider (12) to rise and fall, and pushes the movable pressure plate (9) to move laterally through the push-pull rod (14).

7. A power battery with an adjustable thickness side support plate according to claim 6, characterized in that: The screw (11) has an internal hexagonal operating hole (11a) at its top end for external tools to rotate the screw (11).

8. A power battery with an adjustable thickness side support plate according to any one of claims 4 to 7, characterized in that: The movable pressure plate (9) has a hole (9a) on its surface. A pressure detection component (15) is provided in the hole (9a), including an elastic element and a pressure sensor. One end of the elastic element abuts against the movable pressure plate (9), and the other end extends out of the hole (9a) to contact the side of the battery cell module (1). The pressure sensor is located between the abutting surface of the elastic element and the movable pressure plate (9) and is used to detect the pressure on the elastic element to provide feedback on the lateral constraint force.

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