Battery pack with high safety

Abstract

The application discloses a high-safety battery pack, comprising a bottom box, a panel support, a cover body, a battery module and an anti-collision piece. The bottom of the panel support is fixed to the bottom box, and a panel is arranged on the panel support, wherein the panel is provided with an insert for connecting exposed ends of copper bars. The cover body is provided with a panel opening. The battery module is provided with an end plate. The anti-collision piece is arranged on the panel support and extends to the side of the end plate. When the panel support is tilted to the side of the battery module to the limit position under the action of external force, the anti-collision piece is abutted against the end plate, and a gap is formed between the exposed ends of the copper bars and the end plate. The high-safety battery pack of the application can make the anti-collision piece abut against the end plate first when the panel support is tilted to the side of the battery module to the limit position under the action of external force, limit further tilting of the panel support, ensure that a safe gap is kept between the panel and the end plate, effectively avoid contact between the end plate and the exposed ends of the copper bars, fundamentally avoid short-circuit failure, and significantly improve the use safety of the battery pack.

Description

Technical Field

[0001] This application relates to the field of battery pack technology, and in particular to a battery pack with high safety. Background Technology

[0002] As a core component in the field of battery energy storage, the structure of the battery pack directly affects the safety and stability of the equipment. The battery packs provided in related technologies mainly consist of a base box, a panel support, a cover, and battery modules. The panel support is fixed to the base box, and the panel is assembled on the panel support and integrates multiple plug-in modules. The cover includes a top plate and peripheral side plates. The peripheral side plates have a ring structure with panel openings. The cover covers the base box, forming a cavity between the cover and the base box. The battery modules are placed within this cavity, and the panel support portion is located within the cavity, with the panel mounting portion extending from the panel opening. The plug-in modules on the panel are connected to the battery modules via copper busbars, with the end of the copper busbar connected to the plug-in module being the exposed end. Although this battery pack integrates multiple plug-in modules through an integrated panel, simplifying the assembly process, when the panel is subjected to an external force towards the cavity, it easily causes the panel support to tilt towards the battery module side, causing the exposed end of the copper busbar to contact the metal end plate of the battery module, leading to a short circuit fault. This seriously threatens the safety of the battery pack and fails to meet the high safety requirements of new energy equipment for battery packs.

[0003] In view of the above, this utility model is hereby proposed. Utility Model Content

[0004] To solve one of the above-mentioned technical problems, this utility model provides a battery pack with high safety.

[0005] The present invention adopts the following technical solution:

[0006] A high-safety battery pack includes:

[0007] Base box;

[0008] A panel bracket, the bottom of which is fixed to the base box, and a panel is provided on the panel bracket. The panel has a plug for connecting the exposed end of a copper busbar.

[0009] A cover body having a panel opening, the cover body being connected to the base box, a cavity being formed between the cover body and the base box, a panel support portion being located in the cavity, and a portion of the panel support body having a panel protruding from the panel opening;

[0010] A battery module is disposed within the cavity, the battery module has an end plate, and there is a gap between the end plate and the panel support;

[0011] A collision avoidance component is disposed on the panel bracket and extends toward one side of the end plate;

[0012] When the panel bracket tilts to the extreme position towards the battery module under the action of external force, the anti-collision component abuts against the end plate, and there is a gap between the exposed end of the copper busbar and the end plate.

[0013] Optionally, the anti-collision component is located on the side of the panel bracket away from the base box.

[0014] Optionally, the panel bracket has a motherboard and side-bent edges located on both sides of the motherboard;

[0015] The panel is disposed on the motherboard, and the motherboard and the end plate are parallel;

[0016] Along the thickness direction of the motherboard, the anti-collision member protrudes from the side bend edge.

[0017] Optionally, the anti-collision component is located inside the side bend and is fixed to the side bend by fasteners.

[0018] Optionally, the anti-collision component includes an anti-collision center plate and anti-collision side plates disposed on both sides of the anti-collision center plate;

[0019] One of the anti-collision side panels is attached to the side bend and fixed to the side bend by fasteners, and the other anti-collision side panel has a gap with the side bend.

[0020] Optionally, the anti-collision components are respectively provided on both sides of the panel bracket.

[0021] Optionally, the structural strength and hardness of the anti-collision component are greater than those of the panel bracket.

[0022] Optionally, an insulating layer is provided on the side of the end plate of the battery module facing the panel bracket.

[0023] Optionally, the bottom of the panel bracket is provided with a downward bent edge;

[0024] The lower bent edge is fixed to the base box by fasteners.

[0025] Optionally, a positioning pin is provided at the bottom of the panel bracket;

[0026] Positioning holes are provided on the bottom box;

[0027] With the panel bracket and the base box connected, the positioning pin is inserted into the positioning hole.

[0028] By adopting the above technical solution, this application has the following beneficial effects:

[0029] The high-safety battery pack of this application, when the panel bracket tilts to its limit position towards the battery module under external force, the anti-collision component will preferentially stop against the end plate, limiting further tilting of the panel bracket, ensuring a safe gap between the panel and the end plate, effectively avoiding contact between the end plate and the exposed end of the copper busbar, fundamentally avoiding the occurrence of short circuit faults, and significantly improving the safety of the battery pack.

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but do not constitute an undue limitation of the present invention. Obviously, the drawings described below are merely some embodiments; those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0032] Figure 1 A top view of the end plate and panel support of a high-safety battery pack provided in an embodiment of this application;

[0033] Figure 2 A schematic diagram of the panel support of a high-safety battery pack provided in this application embodiment being connected to the base box;

[0034] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0035] Figure 4 A partial structural schematic diagram of a high-safety battery pack provided in an embodiment of this application;

[0036] Figure 5 A schematic diagram of the panel support connection panel structure of a high-safety battery pack provided in this application embodiment;

[0037] Figure 6 A partial structural diagram of the cover of the high-safety battery pack provided in this application embodiment being connected to the bottom box;

[0038] Figure 7 A partial structural diagram of the bottom box of a high-safety battery pack provided in an embodiment of this application;

[0039] Figure 8 A schematic diagram of the panel support structure for a high-safety battery pack provided in this application embodiment;

[0040] Figure 9 Another view of the panel support for a high-safety battery pack provided in the embodiments of this application.

[0041] In the diagram: 1. Base box, 11. Positioning hole, 2. Panel bracket, 21. Main board, 22. Side bend, 23. Lower bend, 23. Positioning pin, 231. Cover, 3. Panel opening, 31. End plate, 4. Anti-collision component, 5. Anti-collision middle plate, 51. Anti-collision side plate, 52. Copper busbar, 6. Exposed end, 61. Panel, 7. High voltage positive plug, 71. High voltage negative plug, 72. Low voltage communication plug, 73. MSD plug, 74.

[0042] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0044] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0046] like Figures 1 to 9As shown in the illustration, this application provides a high-safety battery pack, including: a base box 1, a panel bracket 2, a cover 3, a battery module, and a shock absorber 5. The bottom of the panel bracket 2 is fixed to the base box 1, and a panel 7 is disposed on the panel bracket 2. The panel 7 has a plug for connecting the exposed end 61 of a copper busbar 6. The plug for connecting the copper busbar 6 may include a high-voltage positive plug 71 and a high-voltage negative plug 72. In this application, other plugs may also be disposed on the panel 7, such as a low-voltage communication plug 73 and an MSD plug 74. The placement of each plug on the panel 7 achieves a high degree of integration of the electrical interfaces of the panel 7, eliminating the need for separate installation structures for different plugs, greatly simplifying the assembly process of the battery pack, reducing the number of parts and assembly steps, and significantly improving the assembly efficiency of the battery pack. The copper busbar 6 is used to connect the battery module. The cover 3 has a panel opening 31 and is connected to the base box 1, forming a cavity between the cover 3 and the base box 1. A portion of the panel support 2 is located within this cavity, and the portion of the panel support 2 where the panel 7 is mounted protrudes from the panel opening 31. The battery module is disposed within the cavity and has an end plate 4. A gap exists between the end plate 4 and the panel support 2. An anti-collision member 5 is mounted on the panel support 2 and extends towards the end plate 4. Under external force, when the panel support 2 tilts to its limit towards the battery module, the anti-collision member 5 abuts against the end plate 4, and a gap exists between the exposed end 61 of the copper busbar 6 and the end plate 4. The high-safety battery pack of this application has an anti-collision component 5. When the panel support 2 tilts to the extreme position towards the battery module under the action of external force, the anti-collision component 5 will first stop against the end plate 4, limiting the further tilting of the panel support 2, ensuring that a safe gap is maintained between the panel 7 and the end plate 4, effectively avoiding contact between the end plate 4 and the exposed end 61 of the copper busbar 6, fundamentally avoiding the occurrence of short circuit faults, and significantly improving the safety of the battery pack.

[0047] like Figure 1 and Figure 2 As shown, the anti-collision member 5 is disposed on the side of the panel bracket 2 away from the base box 1, that is, the anti-collision member 5 is disposed on the side of the battery pack away from the base box 1 along the height direction. Under the action of external force, the upper part of the panel bracket 2 along the height direction will have a larger tilt angle than the lower part, so the upper part of the panel bracket 2 along the height direction will contact the end plate 4 of the battery module first. The anti-collision member 5 is disposed on the top of the panel bracket 2, which can stop against the end plate as early as possible, reduce the tilt angle of the panel bracket 2, limit the further tilting of the panel bracket 2, maintain the safe gap between the end plate 4 and the exposed end 61 of the copper busbar 6, minimize the risk of short circuit, and enhance the structural stability and safety of the battery pack.

[0048] In one possible implementation, such as Figure 2, Figure 3 , Figure 8 and Figure 9 As shown, the panel bracket 2 has a main board 21 and side-bent edges 22 located on both sides of the main board 21. The panel 7 is disposed on the main board 21, and the main board 21 and the end plate 4 are parallel. Along the thickness direction of the main board 21, the anti-collision member 5 protrudes from the side-bent edges 22. The side-bent edges 22 increase the structural strength of the panel bracket 2, improve its resistance to deformation, and structurally reduce the risk of tilting under external forces. Simultaneously, the main board 21 and the end plate 4 remain approximately parallel, and the anti-collision member 5 protrudes from the side-bent edges 22 along the thickness direction of the main board 21. This ensures that when the panel bracket 2 is subjected to external forces and tends to tilt, the anti-collision member 5 will contact the end plate 4 first, prior to the side-bent edges 22 and the panel 7, preventing the side-bent edges 22 or the panel 7 from colliding with the end plate 4 first and causing severe structural deformation. It also limits the tilting amplitude of the panel bracket 2, reliably maintains the safe gap between the end plate 4 and the exposed end 61 of the copper busbar 6, and further ensures the battery pack's short-circuit protection effect.

[0049] like Figure 1 , Figure 2 and Figure 3 As shown, the anti-collision component 5 is located inside the side bend edge 22 and is fixed to the side bend edge 22 by fasteners. The anti-collision component 5 does not need to be connected to the main board 21 by fasteners, simplifying the assembly structure. The anti-collision component 5 is located on the edge of the main board 21, avoiding interference with other structural components and facilitating the optimization of the overall structural layout. The fasteners can be easily disassembled and replaced, facilitating the replacement of the anti-collision component 5. The fasteners can be bolts and nuts, with the bolt shank passing through both the anti-collision component 5 and the side bend edge 22, and the nut threadedly connected to the shank. The bolt nut and the nut are respectively confined within the anti-collision component 5 and the side bend edge 22.

[0050] In one possible implementation, such as Figure 2 and Figure 3As shown, the anti-collision component 5 includes an anti-collision center plate 51 and anti-collision side plates 52 disposed on both sides of the anti-collision center plate 51. One anti-collision side plate 52 is fitted to the side bending edge 22 and fixed to the side bending edge 22 by fasteners, while the other anti-collision side plate 52 has a gap with the side bending edge 22. The two anti-collision side plates 52 are vertically connected to both sides of the anti-collision center plate 51, forming a stable structure with a U-shaped cross-section. The U-shaped structure can utilize the mechanical properties of the U-shape to enhance the bending strength of the anti-collision component 5 itself, making it less prone to deformation when it abuts the end plate 4 under impact force, ensuring a stable and reliable limiting effect. Two U-shaped side openings are formed between the anti-collision center plate 51 and the two anti-collision side plates 52, with the two side openings facing the main plate 21 and the end plate 4, respectively. Under external force, when the panel bracket 2 tilts to its limit position towards the battery module, the side opening of the anti-collision member 5 near the end plate 4 will preferentially abut against the end plate 4. That is, the U-shaped ends of the anti-collision middle plate 51 and the anti-collision side plate 52 abut against the end plate 4. The stable U-shaped structure has good stability, resulting in high structural strength and good limiting effect. It can effectively block the contact between the panel 7 and the end plate 4, fundamentally avoiding the occurrence of short circuit faults and significantly improving the safety of the battery pack. An internal space is formed between the two anti-collision side plates 52, which can easily accommodate the nuts of the fasteners.

[0051] In one possible implementation, such as Figure 1 and Figure 2 As shown, anti-collision members 5 are respectively provided on both sides (both sides along the width direction) of the panel bracket 2. When the panel bracket 2 is tilted under force, both sides can be simultaneously restrained by the anti-collision members 5, forming a symmetrical support and buffer structure. This prevents the panel bracket 2 from tilting or twisting due to uneven force on one side, ensuring that its tilt range is uniformly limited, thereby keeping the panel 7 in a balanced state and preventing local contact with the exposed end 61 of the copper busbar 6 due to excessive tilt on one side. At the same time, the two anti-collision members 5 can share the pressure generated by external impact, preventing the single anti-collision member 5 from being damaged due to excessive force, and significantly improving the service life of the anti-collision members 5.

[0052] The anti-collision component 5 has a greater structural strength and hardness than the panel support 2. The anti-collision component 5 can be made of 700L series steel, which has superior structural strength and hardness compared to the commonly used materials for the panel support 2. As a high-strength, low-alloy structural steel, 700L series steel possesses excellent impact resistance and deformation resistance, maintaining structural stability under external impact and is less prone to bending or breakage.

[0053] An insulating layer is provided on the side of the end plate 4 of the battery module facing the panel support 2. The insulating layer forms a second layer of insulation protection, so that even if the end plate 4 accidentally comes into contact with the exposed end 61 of the copper busbar 6, the insulating layer can block the current conduction path, fundamentally avoiding the risk of short circuit.

[0054] In one possible implementation, such as Figure 8 and Figure 9 As shown, the bottom of the panel bracket 2 is provided with a lower bent edge 23, which is fixed to the base box 1 by fasteners. The lower bent edge 23 facilitates the connection with the base box 1 and enhances the structural strength of the bottom of the panel bracket 2, reducing the risk of deformation of the panel bracket 2 as a whole.

[0055] like Figure 7 , Figure 8 and Figure 9 As shown, a positioning pin 231 is provided at the bottom of the panel bracket 2, and a positioning hole 11 is provided on the base box 1. When the panel bracket 2 and the base box 1 are connected, the positioning pin 231 is inserted into the positioning hole 11. The positioning pin 231 is connected to the side of the lower bent edge 23 near the base box 1. The insertion of the positioning pin 231 into the positioning hole 11 enables rapid and accurate positioning of the panel bracket 2 and the base box 1, avoiding positional shifts during assembly and significantly improving assembly efficiency and accuracy. The lower bent edge 23 is fixed to the base box 1 by fasteners, which can be screws and nuts. The screw shank passes through the lower bent edge 23 and the base box 1, and the nut is threaded onto the screw. The screw head and the nut are located on opposite sides of the lower bent edge 23 and the base box 1.

[0056] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-safety battery pack, characterized in that, include: Base box; A panel bracket, the bottom of which is fixed to the base box, and a panel is provided on the panel bracket. The panel has a plug for connecting the exposed end of a copper busbar. A cover body having a panel opening, the cover body being connected to the base box, a cavity being formed between the cover body and the base box, a panel support portion being located in the cavity, and a portion of the panel support body having a panel protruding from the panel opening; A battery module is disposed within the cavity, the battery module has an end plate, and there is a gap between the end plate and the panel support; A collision avoidance component is disposed on the panel bracket and extends toward one side of the end plate; When the panel bracket tilts to the extreme position towards the battery module under the action of external force, the anti-collision component abuts against the end plate, and there is a gap between the exposed end of the copper busbar and the end plate.

2. The high-safety battery pack according to claim 1, characterized in that, The anti-collision component is located on the side of the panel bracket away from the base box.

3. The high-safety battery pack according to claim 1, characterized in that, The panel support has a main board and side-bent edges located on both sides of the main board; The panel is disposed on the motherboard, and the motherboard and the end plate are parallel; Along the thickness direction of the motherboard, the anti-collision member protrudes from the side bend edge.

4. The high-safety battery pack according to claim 3, characterized in that, The anti-collision component is located inside the side bend and is fixed to the side bend by fasteners.

5. The high-safety battery pack according to claim 3, characterized in that, The anti-collision component includes an anti-collision center plate and anti-collision side plates disposed on both sides of the anti-collision center plate; One of the anti-collision side panels is attached to the side bend and fixed to the side bend by fasteners, and the other anti-collision side panel has a gap with the side bend.

6. The high-safety battery pack according to claim 1, characterized in that, The anti-collision components are respectively installed on both sides of the panel bracket.

7. The high-safety battery pack according to claim 1, characterized in that, The structural strength and hardness of the anti-collision component are both greater than those of the panel bracket.

8. The high-safety battery pack according to claim 1, characterized in that, An insulating layer is provided on the side of the end plate of the battery module facing the panel bracket.

9. The high-safety battery pack according to claim 1, characterized in that, The bottom of the panel bracket is provided with a downward bent edge; The lower bent edge is fixed to the base box by fasteners.

10. The high-safety battery pack according to any one of claims 1-9, characterized in that, The bottom of the panel bracket is provided with a positioning pin; Positioning holes are provided on the bottom box; With the panel bracket and the base box connected, the positioning pin is inserted into the positioning hole.

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