Plug and battery pack

Abstract

The utility model provides a plug and a battery pack, the plug provided by the utility model comprises a cylinder body arranged on a shell of the battery pack in a penetrating manner, a plugging main body arranged in the cylinder body in a sliding manner, and an elastic piece arranged between the plugging main body and the cylinder body; a through hole communicating with the interior of the shell is formed in the barrel, a communicating channel is formed in the plugging body, and the elastic piece has an extending state at the low temperature and a contracting state at the high temperature. And when the elastic piece is converted into the contraction state from the stretching state, the plugging main body can be pulled to move towards one side of the shell, so that the through hole is communicated with the outside of the shell through the communication channel. According to the plug disclosed by the utility model, when a battery cell leakage event occurs, the leakage can be quickly and effectively discharged, so that the leakage problem is quickly handled, the potential risk is reduced, and the safety of a battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a plug. Meanwhile, the utility model also relates to a battery pack provided with the plug. Background Art

[0002] The power battery pack is a core component of electric vehicles and energy storage systems. It contains multiple cells. Abnormal conditions may occur during the charging and discharging of these cells, such as cell damage leading to electrolyte leakage. However, electrolyte leakage not only damages the cells, but may also have a negative impact on the safety and performance of the battery pack. Therefore, it is crucial to solve the problem of cell leakage and quickly discharge the leaked electrolyte.

[0003] However, traditional methods for solving the problem of battery leakage usually have the following disadvantages:

[0004] 1. Traditional methods usually require the use of special tools to remove fasteners or sealing devices, which makes the maintenance and repair process complicated and time-consuming, especially in emergency situations, there are problems such as difficulty in solving leakage and poor safety.

[0005] 2. The complexity and difficult-to-disassemble nature of fasteners and sealing devices limits rapid leak handling in emergency situations, which may also cause safety and performance issues.

[0006] 3. High maintenance cost: Traditional maintenance methods require expertise and equipment, which increases maintenance costs. Utility Model Content

[0007] In view of this, the present invention aims to provide a plug to improve the safety of a battery pack.

[0008] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0009] A plug includes a barrel penetratingly disposed on a shell of a battery pack, a blocking body slidably disposed in the barrel, and an elastic member disposed between the blocking body and the barrel;

[0010] The cylinder is provided with a through hole communicating with the interior of the shell, the blocking body is provided with a communicating channel, and the elastic member has an extended state at low temperature and a contracted state at high temperature;

[0011] When the elastic member is converted from the extended state to the contracted state, the blocking body can be pulled to move toward one side of the shell, so that the through hole is connected to the outside of the shell through the connecting channel.

[0012] Furthermore, a baffle is provided at one end of the cylinder located in the shell; the elastic member is a spring, and two ends of the spring are respectively abutted against the baffle and the blocking body.

[0013] Furthermore, the blocking body is provided with a guide portion extending into the shell, and the spring is sleeved on the guide portion.

[0014] Furthermore, the spring is made of shape memory material; and / or the baffle is provided with a first avoidance hole for avoiding the guide portion.

[0015] Furthermore, the blocking body is provided with a sliding protrusion, the inner wall of the cylinder is provided with a sliding groove extending along its circumference, and the sliding protrusion is slidably arranged in the sliding groove.

[0016] Furthermore, a rack is provided at one end of the blocking body away from the baffle, a toggle switch is rotatably provided in the cylinder body and meshes with the rack, and a second avoidance hole is provided on the cylinder body for avoiding the operating end of the toggle switch; when the operating end is toggled, the toggle switch can drive the blocking body to move toward one side of the shell through the rack to compress the spring and connect the connecting channel with the through hole.

[0017] Furthermore, the blocking body is cylindrical, and one end of the communication channel is arranged on the circumferential side of the blocking body, and the other end of the communication channel is arranged on the blocking body at the same end as the rack.

[0018] Furthermore, the toggle switch is disposed in the cylinder via a rotating shaft; and / or a sealing plug is disposed at one end of the cylinder away from the baffle.

[0019] Furthermore, a sealing member is provided between the blocking body and the cylinder.

[0020] Compared with the prior art, the utility model has the following advantages:

[0021] The plug described in the utility model can pull the sealing body to move toward one side of the shell when the elastic member is converted from an extended state to a contracted state, so that the through hole is connected to the outside of the shell through the connecting channel, thereby building a channel for discharging leaked liquid, so that when a battery cell leakage event occurs, the leaked liquid can be discharged quickly and effectively, thereby quickly handling the leakage problem, reducing potential risks, and improving the safety of the battery pack.

[0022] In addition, the setting of the baffle facilitates the disassembly and assembly of the spring. The setting of the guide part can improve the reliability of the spring. The spring is made of shape memory material, which can be fixed into another shape after plastic deformation at low temperature and can be restored to the original shape by heating to a certain critical temperature, so as to realize the switching of the spring between the extended state and the contracted state.

[0023] In addition, by setting the sliding protrusion and the slide groove, the sliding stability of the plugging body can be improved. The coordinated setting of the rack and the toggle switch can realize the manual opening of the plug, which is conducive to the purpose of manually handling the leakage. The setting of the sealing plug can not only improve the protective effect and aesthetic appearance of the plug, but also facilitate replacement and reduce the maintenance cost of the plug. The setting of the seal is conducive to ensuring the sealing of the battery pack under normal use.

[0024] Another object of the present invention is to provide a battery pack, on which the plug as described above is provided.

[0025] The battery pack described in the utility model and the above-mentioned plug have the same beneficial effects as the conventional technology, and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the plug and the housing when assembled according to an embodiment of the utility model;

[0028] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0029] Figure 3 for Figure 1 A schematic structural diagram of the structure from another viewing angle;

[0030] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0031] Figure 5 This is a schematic diagram of the three-dimensional structure of the plug according to an embodiment of the utility model;

[0032] Figure 6 This is a schematic diagram of the internal structure of the plug according to an embodiment of the utility model;

[0033] Figure 7 This is an exploded view of the plug according to an embodiment of the utility model;

[0034] Figure 8 It is a structural schematic diagram of the cylinder described in the embodiment of the utility model;

[0035] Fig. 9 This is a structural schematic diagram of the blocking body according to an embodiment of the utility model;

[0036] Fig.10 This is a schematic diagram of the structure of the sealing member according to an embodiment of the utility model;

[0037] Description of reference numerals:

[0038] 1. Shell; 11. Bottom plate; 12. Side beam; 13. Cross beam;

[0039] 2. Cylinder; 21. Baffle; 211. First avoidance hole; 22. Slide groove; 23. Through hole; 24. Second avoidance hole;

[0040] 3. Blocking body; 30. Communication channel; 31. Guide part; 32. Sliding protrusion; 33. Rack;

[0041] 4. Spring;

[0042] 5. Toggle switch; 51. Operation end; 52. Mounting hole; 53. Toothed disc;

[0043] 6. Rotating shaft; 7. Sealing plug; 8. Sealing element. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0045] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0047] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0048] Embodiment 1

[0049] The present embodiment relates to a plug, which is installed on the shell 1 of the battery pack and can quickly and effectively discharge the leaked liquid when a battery cell leakage event occurs, thereby reducing potential risks and improving the safety of the battery pack.

[0050] In terms of overall structure, Figures 1 to 10 As shown, the plug of this embodiment includes a barrel 2 which is penetrated through the shell 1 of the battery pack, a blocking body 3 which is slidably disposed in the barrel 2 , and an elastic member disposed between the blocking body 3 and the barrel 2 .

[0051] In addition, the cylinder 2 is provided with a through hole 23 communicating with the interior of the shell 1, the blocking body 3 is provided with a communicating channel 30, and the elastic member has an extended state at low temperature and a contracted state at high temperature. When the elastic member is converted from the extended state to the contracted state, it can pull the blocking body 3 to move toward the side of the shell 1, so that the through hole 23 is connected to the outside of the shell 1 through the communicating channel 30.

[0052] It can be understood that, in the plug of this embodiment, when the elastic member is converted from the extended state to the contracted state, the through hole 23 can be connected to the outside of the housing 1 through the connecting channel 30 to discharge the leaked liquid. Such a setting can not only improve the safety of the battery pack, but also reduce maintenance time, improve response speed, reduce maintenance costs, and improve the maintainability and reliability of the battery pack.

[0053] See also Figures 1 to 4 As shown, the shell 1 of the battery pack in this embodiment includes a bottom plate 11, and side beams 12 and a cross beam 13 arranged on the bottom plate 11. The bottom plate 11, the side beams 12 and the cross beams 13 cooperate to form a plurality of installation areas, each of which is used to place a battery module composed of a plurality of battery cells.

[0054] At the same time, in order to ensure that the leakage is discharged smoothly, in the specific implementation, the plug of this embodiment, that is, the cylinder 2 is preferably arranged at the bottom of the side beam 12, and one end of the cylinder 2 having a through hole 23 is inserted into the shell 1, and the other end of the cylinder 2 is located outside the shell 1. The advantage of such a setting is that the leakage can be discharged more cleanly without affecting the flatness and layout of the battery pack.

[0055] Based on the above overall introduction, specifically, in this embodiment, as a preferred implementation form, Figure 3 and Figure 5 As shown, a baffle 21 is provided at one end of the cylinder 2 located in the housing 1. At the same time, the elastic member is a spring 4, and the two ends of the spring 4 are respectively abutted against the baffle 21 and the blocking body 3. In this way, the spring 4 is easy to disassemble and assemble.

[0056] Furthermore, in this embodiment, as a preferred implementation form, Figure 3 and Figure 5 As shown, the blocking body 3 is provided with a guide portion 31 extending into the housing 1 , and the spring 4 is sleeved on the guide portion 31 to improve the reliability of the spring 4 .

[0057] Secondly, as a preferred implementation form, the baffle 21 of this embodiment is provided with a first avoidance hole 211 for avoiding the guide portion 31 to ensure that the displacement of the blocking body 3 in the cylinder 2 can meet the connection between the through hole 23 and the connecting channel 30.

[0058] Similarly, as a preferred embodiment, the spring 4 is made of shape memory material. The advantage of such a configuration is that the shape memory material can be fixed into another shape after plastic deformation at low temperature, and can be restored to its original shape by heating to a certain critical temperature. This can realize the switching of the spring 4 between the extended state and the contracted state, thereby achieving the purpose of automatically eliminating leakage of the plug.

[0059] The shape memory material is specifically a shape memory alloy well known to those skilled in the art, such as nickel-titanium alloy, titanium-nickel-copper, titanium-nickel-iron or titanium-nickel-chromium, etc. Springs 4, washers and metal wires made of shape memory alloys are relatively mature and inexpensive, and are often used in the automotive and aerospace industries.

[0060] In addition, combined Figure 8 and Fig. 9 As shown, the blocking body 3 is provided with a sliding protrusion 32, and the inner wall of the cylinder 2 is provided with a slide groove 22 extending along its circumference, and the sliding protrusion 32 is slidably arranged in the slide groove 22. By providing the sliding protrusion 32 and the slide groove 22, the sliding stability of the blocking body 3 can be improved.

[0061] In specific implementation, the displacement of the blocking body 3 can also be limited by setting the length of the slide groove 22. For example, the length of the slide groove 22 is set to a degree that the connecting channel 30 is just connected to the through hole 23 when the blocking body 3 moves toward the side of the shell 1, and the connecting channel 30 is at least completely misaligned with the through hole 23 when the blocking body 3 moves away from the side of the shell 1.

[0062] At the same time, the number of the above-mentioned sliding protrusions 32 and sliding grooves 22 can be set and adjusted according to the actual sliding requirements of the blocking body 3. For example, there are two sliding protrusions 32 arranged at intervals along the circumference of the blocking body 3, and the number and position of the sliding grooves 22 correspond to the sliding protrusions 32.

[0063] Furthermore, in this embodiment, as a preferred implementation form, Figure 6 , Figure 7 and Fig. 9 As shown, a rack 33 is provided at one end of the blocking body 3 away from the baffle 21 , a toggle switch 5 rotatably engaged with the rack 33 is provided in the cylinder 2 , and a second avoidance hole 24 for avoiding the operating end 51 of the toggle switch 5 is provided on the cylinder 2 .

[0064] When the operating end 51 is toggled, the toggle switch 5 can drive the blocking body 3 to move toward the side of the housing 1 through the rack 33 to compress the spring 4 and connect the communication channel 30 with the through hole 23. The advantage of this arrangement is that the plug can be manually opened, which is conducive to the purpose of manually handling the leakage.

[0065] In the specific implementation, in this embodiment, as a preferred implementation form, the toggle switch 5 is arranged in the cylinder 2 through the rotating shaft 6, and the toggle switch 5 is provided with a mounting hole 52 for assembling with the rotating shaft 6. Furthermore, the toggle switch 5 is meshed and connected with the rack 33 through a toothed disc 53, and the toothed disc 53 and the operating end 51 are respectively arranged on both sides of the mounting hole 52 and arranged opposite to each other.

[0066] Of course, different directions of moving the operating end 51 will cause the connecting channel 30 to be connected or disconnected with the through hole 23. Specifically, when the operating end 51 is moved away from the side of the shell 1, the toothed disc 53 pushes the blocking body 3 to move toward the side of the shell 1 through the rack 33, so that the connecting channel 30 is connected with the through hole 23. When the operating end 51 is moved toward the side of the shell 1 (in the reverse direction), the connecting channel 30 and the through hole 23 are misaligned and disconnected.

[0067] Moreover, the second avoidance hole 24 of the present embodiment is preferably configured as a long hole extending axially along the cylinder 2 , so that the smoothness of the operation of the toggle switch 5 can be ensured without affecting the structural strength of the cylinder 2 .

[0068] At the same time, as a preferred implementation form, in this embodiment, a sealing plug 7 is provided at one end of the cylinder 2 away from the baffle 21. When in use, the sealing plug 7 can be pulled out to ensure the leakage discharge effect. In this way, not only the protection effect and aesthetic appearance of the plug can be improved, but also it is easy to replace and reduce the maintenance cost of the plug.

[0069] Furthermore, in this embodiment, as a preferred implementation form, Figure 6 and Fig. 9 As shown, the blocking body 3 is cylindrical, and one end of the communication channel 30 is arranged on the peripheral side of the blocking body 3, and the other end of the communication channel 30 and the rack 33 are arranged on the blocking body 3. In specific implementation, the communication channel 30 is L-shaped, so that the communication channel 30 can be opened along the radial direction and axial direction of the blocking body 3, reducing the difficulty of setting the communication channel 30.

[0070] In addition, in this embodiment, as a preferred implementation form, see Figure 6 and Fig.10 As shown, a seal 8 is provided between the blocking body 3 and the barrel 2. The seal 8 can be a sealing ring, which is sleeved on the blocking body 3 to ensure the sealing between the blocking body 3 and the barrel 2, thereby facilitating the sealing of the battery pack under normal use.

[0071] The plug of this embodiment can pull the sealing body 3 to move toward the side of the shell 1 when the elastic member is converted from an extended state to a contracted state, so that the through hole 23 is connected to the outside of the shell 1 through the connecting channel 30, thereby building a channel for discharging leaked liquid, so that when a battery cell leakage event occurs, the leaked liquid can be discharged quickly and effectively, thereby quickly dealing with the leakage problem, reducing potential risks, and improving the safety of the battery pack.

[0072] Embodiment 2

[0073] The present embodiment relates to a battery pack, on which the plug in the first embodiment is provided.

[0074] The battery pack of this embodiment can achieve rapid and effective treatment of leakage by providing the plug in the first embodiment, thereby having better safety quality.

[0075] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plug, characterized in that: It comprises a barrel which is arranged on the shell of the battery pack in a penetrating manner, a blocking body which is slidably arranged in the barrel, and an elastic member which is arranged between the blocking body and the barrel; The cylinder is provided with a through hole communicating with the interior of the shell, the blocking body is provided with a communicating channel, and the elastic member has an extended state at low temperature and a contracted state at high temperature; When the elastic member is converted from the extended state to the contracted state, the blocking body can be pulled to move toward one side of the shell, so that the through hole is connected to the outside of the shell through the connecting channel.

2. The plug according to claim 1, characterized in that: A baffle is provided at one end of the cylinder located inside the shell; The elastic member is a spring, and two ends of the spring are respectively abutted against the baffle and the blocking body.

3. The plug according to claim 2, characterized in that: The blocking body is provided with a guide portion extending into the shell, and the spring is sleeved on the guide portion.

4. The plug according to claim 3, characterized in that: The spring is made of shape memory material; and / or, the baffle is provided with a first avoidance hole for avoiding the guide portion.

5. The plug according to claim 2, characterized in that: The blocking body is provided with a sliding protrusion, the inner wall of the cylinder is provided with a sliding groove extending along the circumference of the cylinder, and the sliding protrusion is slidably arranged in the sliding groove.

6. The plug according to claim 5, characterized in that: A rack is provided at one end of the blocking body away from the baffle, a toggle switch rotatably engaged with the rack is provided in the cylinder, and a second avoidance hole for avoiding the operating end of the toggle switch is provided on the cylinder; When the operating end is toggled, the toggle switch can drive the blocking body to move toward one side of the housing through the rack to compress the spring and connect the communication channel with the through hole.

7. The plug according to claim 6, characterized in that: The blocking body is cylindrical, and one end of the communication channel is arranged on the peripheral side of the blocking body, and the other end of the communication channel is arranged on the blocking body at the same end as the rack.

8. The plug according to claim 6, characterized in that: The toggle switch is arranged in the cylinder through a rotating shaft; and / or a sealing plug is arranged at one end of the cylinder away from the baffle.

9. The plug according to any one of claims 1 to 8, characterized in that: A sealing member is provided between the blocking body and the cylinder.

10. A battery pack, characterized in that: The battery pack is provided with a plug as claimed in any one of claims 1 to 9.

Images