Cover plate assembly and battery

Abstract

The utility model relates to the technical field of new energy, particularly provides a cover plate assembly and a battery, and aims to solve the technical problem of micro short circuit caused by the fact that overflowing electrolyte flows between a pole and a cover plate in the prior art. Therefore, the cover plate assembly comprises a cover plate, a pole assembly arranged on the cover plate and a liquid injection hole located in one side of the pole assembly, the cover plate comprises a blocking piece located between the liquid injection hole and the pole assembly, and in the width direction of the cover plate, the cover plate is provided with a drainage groove located in one side of the blocking piece. The cover plate is provided with the drainage groove, so that overflowed electrolyte can be blocked by the blocking piece and flows to the drainage groove on one side of the blocking piece to avoid the pole assembly, the electrolyte is effectively prevented from flowing between the pole and the cover plate to generate micro short circuit to cause liquid leakage, and the use safety of the battery is ensured.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, specifically providing a cover plate assembly and a battery. Background Technology

[0002] As people's living standards improve and their environmental awareness increases, the traditional energy industry is gradually shrinking, while the new energy industry is developing rapidly, including the lithium battery industry.

[0003] In traditional lithium batteries, electrolyte often overflows during filling. Since the filling hole is located above the terminal post, the overflowing electrolyte can easily flow between the terminal post and the cover plate. The exposed electrolyte reacts with moisture in the air, causing a micro-short circuit between the negative terminal post and the cover plate, which in turn causes corrosion of the cover plate and the casing, posing a risk of leakage.

[0004] Therefore, a new technical solution is needed in this field to solve the above problems. Utility Model Content

[0005] The present invention aims to solve the above-mentioned technical problem, namely, to solve the technical problem of micro-short circuit caused by the overflowing electrolyte flowing between the electrode and the cover plate.

[0006] In a first aspect, the present invention provides a cover plate assembly, including a cover plate, an electrode assembly disposed on the cover plate, and an injection hole located on one side of the electrode assembly. The cover plate includes a blocking member located between the injection hole and the electrode assembly. In the width direction of the cover plate, the cover plate is provided with a drainage groove located on one side of the blocking member.

[0007] When the above technical solution is adopted, by setting a drainage groove on the cover plate, the electrolyte overflowing from the injection hole during liquid injection is blocked by the blocking component and flows to the drainage groove on the side of the blocking component to avoid the terminal post. This effectively prevents the electrolyte from flowing to the terminal post and the cover plate to generate a micro short circuit, which would lead to leakage and ensure the safety of battery use.

[0008] In the preferred embodiment of the above-mentioned cover plate assembly, the drainage groove extends along the length direction of the cover plate.

[0009] In the preferred embodiment of the above-mentioned cover plate assembly, two drainage channels are provided and located on both sides of the blocking member.

[0010] In the preferred embodiment of the above-mentioned cover plate assembly, the drainage groove is located on both sides of the pole post assembly.

[0011] In the preferred embodiment of the above-mentioned cover plate assembly, the cover plate includes a first surface and a second surface located on one side of the cover plate in the width direction and adjacent to the first surface. The drainage channel includes a first part disposed on the first surface and a second part disposed on the second surface, and the first part and the second part are in communication.

[0012] In the preferred embodiment of the above-mentioned cover plate assembly, the pole assembly includes a pole and an insulating frame covering the side of the pole, and the blocking member is located between the insulating frame and the injection hole.

[0013] In the preferred embodiment of the above-mentioned cover plate assembly, the blocking member is integrally formed with the cover plate.

[0014] In the preferred embodiment of the above-mentioned cover plate assembly, the blocking member covers the side of the insulating frame.

[0015] In the preferred embodiment of the above-mentioned cover plate assembly, the length of the drainage groove is greater than the length of the pole assembly.

[0016] In a second aspect, the present invention also provides a battery, the battery including the aforementioned cover assembly. Attached Figure Description

[0017] The preferred embodiments of this utility model are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a perspective view of the battery of this utility model;

[0019] Figure 2 yes Figure 1 The image shows a side view of the battery of this utility model;

[0020] Figure 3 This is a top view of the cover plate assembly of this utility model;

[0021] Figure 4 yes Figure 3 The figure shows a perspective view of the cover plate assembly of this utility model;

[0022] Figure 5 yes Figure 3 The image shows a front view of the cover plate assembly of this utility model.

[0023] List of reference numerals in the attached diagram:

[0024] 100. Battery; 1. Cover plate; 11. First surface; 12. Second surface; 2. Housing; 21. First side; 22. Second side; 3. Terminal assembly; 31. Terminal; 32. Insulating frame; 4. Blocking element; 5. Injection hole; 6. Drainage channel; 61. First part; 62. Second part. Detailed Implementation

[0025] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0026] It should be noted that in the description of this utility model, terms such as "inner," "outer," "upper," "lower," "top," "bottom," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] In one embodiment, a cover plate assembly of the present invention includes a cover plate 1, an electrode assembly 3 disposed on the cover plate 1, and an injection hole 5 located on one side of the electrode assembly 3, such as... Figures 1 to 5 As shown.

[0029] Preferably, the cover plate 1 can be a cuboid, a disk, or other geometric shapes, etc., without specific limitations. In this embodiment, the cover plate 1 is a cuboid.

[0030] More preferably, the cover plate 1 can be made of aluminum plate, steel plate or other materials, without specific limitation. In this embodiment, the cover plate 1 is an aluminum plate.

[0031] More preferably, the pole assembly 3 penetrates both ends of the cover plate 1 in the thickness direction, so that one end of the pole assembly 3 is electrically connected to the battery cell located on one side of the cover plate 1, and the other end is electrically connected to the electrical connector located on the other side of the cover plate 1, so as to realize the output or input of electrical energy.

[0032] More preferably, the pole assembly 3 is fixedly connected to the cover plate 1, such as by snap-fit ​​connection or riveting, which can be set by the user as needed, and no specific limitation is made here.

[0033] Furthermore, the injection hole 5 is used for injection. The injection hole 5 penetrates both ends of the cover plate 1 in the thickness direction, thereby achieving the purpose of injection through the injection structure.

[0034] Furthermore, the injection hole 5 is located on one side of the pole assembly 3, for example, on one side of the pole assembly 3 in the length direction x of the cover plate 1, and during injection, the injection hole 5 is above the pole assembly 3.

[0035] It should be noted that in other embodiments, the injection hole 5 may be located on one side of the pole assembly 3 in the width direction y of the cover plate 1. Users can set it as needed, and no specific limitation is made here.

[0036] In one embodiment, the cover plate 1 includes a blocking member 4 located between the injection hole 5 and the electrode assembly 3. In the width direction y of the cover plate 1, the cover plate 1 is provided with a drainage groove 6 located on one side of the blocking member 5, such as... Figures 1 to 5 As shown.

[0037] Preferably, the blocking member 4 is fixedly connected to the cover plate 1, such as by welding, bonding or other fixed connection methods, which are not specifically limited here.

[0038] More preferably, the blocking member 4 can be in the shape of a flat plate or a frame, etc., without being specifically limited here.

[0039] More preferably, the blocking member 4 is disposed between the electrode assembly 3 and the injection hole 5, so that the electrolyte overflowing from the injection hole 5 during injection can be blocked by the blocking member 4 to prevent it from flowing between the electrode assembly 3 and the cover plate 1.

[0040] Preferably, the blocking member 4 is arranged perpendicular to the cover plate 1, or it can be arranged at an acute angle, etc. The specific tilt angle value can be set as needed, and is not specifically limited here.

[0041] More preferably, the blocking member 4 can be disposed near the injection hole 5, near the electrode assembly 3, or in the middle of the area between the injection hole 5 and the electrode assembly 3.

[0042] Furthermore, the flow channel 6 is located on one side of the blocking member 4 in the width direction y of the cover plate 1 and is set close to the blocking member 4, so that the electrolyte blocked by the blocking member 4 flows into the flow channel 6 and then flows out from the flow channel 6, preventing it from flowing between the electrode assembly 3 and the cover plate 1, thus protecting the electrode assembly 3 and preventing its corrosion.

[0043] Furthermore, the drainage groove 6 is formed by recessing inward from the surface of the cover plate 1. The drainage groove 6 can be elongated, or it can be arc-shaped or wavy, etc. The specific shape can be set according to needs and is not specifically limited here.

[0044] Furthermore, one end of the flow channel 6 is close to the end of the blocking member 4 in the width direction y, so that the electrolyte blocked by the blocking member 4 flows from the end of the blocking member 4 into the flow channel 6, and then flows along the flow channel 6, preventing it from flowing between the electrode assembly 3 and the cover plate 1.

[0045] In one embodiment, the drainage channel 6 extends along the length x direction of the cover plate 1, such as... Figures 1 to 5 As shown.

[0046] Preferably, the flow channel 6 is disposed on the surface of the cover plate 1 and extends along the length direction x, so that the electrolyte flows along the flow channel 6 along the length direction x to the bottom of the electrode assembly 3, preventing contact with the electrode assembly 3.

[0047] More preferably, the extension direction of the drainage groove 6 is parallel to the length direction x. In other embodiments, the extension direction of the drainage groove 6 may intersect with the length direction x and be set at an acute angle, etc., which are not specifically limited here.

[0048] More preferably, the end of the drainage groove 6 can be flush with the end face of the blocking member 4 facing the injection hole 5, or it can extend between the blocking member 4 and the injection hole 5, or extend to a position close to the injection hole 5, etc., without specific limitations.

[0049] In one embodiment, the drainage channel 6 is provided in two locations on both sides of the blocking member 4, such as... Figures 1 to 5 As shown.

[0050] Preferably, there are two flow channels 6 located on both sides of the blocking member 4 in the width direction, so that the electrolyte flows from both sides of the blocking member 4 into the flow channels 6, realizing the complete flow of the electrolyte and effectively preventing the electrolyte from flowing between the electrode assembly 3 and the cover plate 1.

[0051] More preferably, the two drainage channels 6 are arranged in parallel to each other, or they may not be arranged in parallel, etc. The specific arrangement can be set as needed, and no specific limitation is made here.

[0052] More preferably, the two drainage channels 6 may have the same or different lengths, and the two drainage channels 6 may have the same or different shapes, etc.

[0053] In one embodiment, the drainage groove 6 is located on both sides of the pole assembly 3, such as... Figures 1 to 5 As shown.

[0054] Preferably, the two drainage channels 6 are located on both sides of the electrode assembly 3, thereby guiding the electrolyte located on both sides of the electrode assembly 3 and effectively preventing the electrolyte from flowing between the electrode assembly 3 and the cover plate 1.

[0055] More preferably, the drainage groove 6 is located on both sides of the electrode assembly 3 in the width direction y, thereby protecting the electrode assembly 3 from both sides in the width direction y and preventing electrolyte from flowing between the electrode assembly 3 and the cover plate 1.

[0056] In one embodiment, the cover plate 1 includes a first surface 11 and a second surface 12 located on one side of the cover plate 1 in the width direction and adjacent to the first surface 11. The drainage channel 6 includes a first portion 61 disposed on the first surface 11 and a second portion 62 disposed on the second surface 12. The first portion 61 and the second portion 62 are in communication. Figure 4 As shown.

[0057] Preferably, the first surface 11 is the surface of the cover plate 1 facing the external space of the battery, and it is also the surface with the largest area of ​​the cover plate 1.

[0058] More preferably, the electrode assembly 3 and the injection hole 5 are both disposed on the first surface 11, thereby facilitating connection with an external electrical connector and facilitating injection.

[0059] Preferably, the second surface 12 is located on one side of the cover plate 1 in the width direction y, the second surface 12 is disposed adjacent to the first surface 11, and the area of ​​the second surface 12 is smaller than the area of ​​the first surface 11.

[0060] More preferably, the first part 61 is disposed on the first surface 11 and the second part 62 is disposed on the second surface 12, so that the electrolyte on the first surface 11 flows into the first part 61 and then flows into the second surface 12 through the second part 62, thereby achieving the function of guiding the electrolyte and preventing it from flowing between the electrode assembly 3 and the cover plate 1.

[0061] Furthermore, the first part 61 is connected to the second part 62, so that the electrolyte flowing into the first part 61 flows into the second part 62 and finally flows onto the second surface 12, thereby achieving the function of guiding the electrolyte.

[0062] In one embodiment, the electrode assembly 3 includes an electrode 31 and an insulating frame 32 covering the side of the electrode 31. The blocking member 4 is located between the insulating frame 32 and the injection hole 5. Figure 3 and Figure 4 As shown.

[0063] Preferably, the pole post 31 penetrates the cover plate 1, one end of the pole post 31 is electrically connected to the battery cell, and the other end is electrically connected to an external electrical connector, thereby realizing the output and input of electrical energy.

[0064] More preferably, the insulating frame 32 is disposed between the pole post 31 and the cover plate 1, thereby providing insulation between the pole post 31 and the cover plate 1 and preventing contact between the two from causing a micro short circuit.

[0065] More preferably, the insulating frame 32 covers the pole post 31 circumferentially, thereby achieving comprehensive insulation of the pole post 31.

[0066] Preferably, the blocking member 4 is disposed between the insulating frame 32 and the liquid injection hole 5, thereby hindering the electrolyte flowing toward the insulating frame 32 and preventing the electrolyte from flowing to the insulating frame 32.

[0067] More preferably, the blocking member 4 can abut against the surface of the insulating frame 32, or there can be a gap between it and the insulating frame 32, etc. The user can set it as needed, and no specific limitation is made here.

[0068] In one embodiment, the blocking member 4 is integrally formed with the cover plate 1, such as... Figures 1 to 5 As shown.

[0069] Preferably, the blocking member 4 is integrally formed with the cover plate 1, which not only simplifies the process but also improves the structural stability.

[0070] More preferably, the blocking member 4 is disposed on the first surface 11 of the cover plate 1 to protect the pole assembly 3.

[0071] It should be noted that the blocking component 4 and the cover plate 1 can also be connected by other methods, such as welding or bonding. The specific fixed connection method can be set as needed and is not specifically limited here.

[0072] In one embodiment, the blocking member 4 covers the side of the insulating frame 32, such as... Figure 3 and Figure 4 As shown.

[0073] Preferably, the blocking member 4 is frame-shaped and covers the side of the insulating frame 32 circumferentially, thereby achieving comprehensive protection of the electrode assembly 3 and preventing electrolyte from flowing between the electrode assembly 3 and the cover plate 1.

[0074] More preferably, the blocking member 4 can cover all sides of the insulating frame 32 circumferentially, or it can cover part of the sides of the insulating frame 32. It is sufficient to prevent the electrolyte from flowing into the space between the electrode assembly 3 and the cover plate 1. No specific limitation is made here.

[0075] In one embodiment, the length of the drainage groove 6 is greater than the length of the pole assembly 3, such as... Figure 3 As shown.

[0076] Preferably, in the length direction, the length of the drainage channel 6 is L1 and the length of the pole assembly 3 is L2. Therefore, L1 > L2, which effectively prevents the liquid flowing out of the drainage channel 6 from flowing back to the pole assembly 3 and the cover plate 1, thereby achieving a more effective protection for the pole assembly 3.

[0077] More preferably, the projection of the pole post assembly 3 onto the drainage groove 6 is located within the drainage groove 6, so that the drainage groove 6 covers the pole post assembly 3 in the length direction, thereby achieving effective protection for the pole post assembly 3.

[0078] In one embodiment, the present invention also provides a battery 100, the battery 100 including the cover plate assembly of any of the above.

[0079] Preferably, the battery 100 further includes a housing 2 with an opening, and a cover plate 1 is sealed to the opening and fixedly connected to the housing 2, such as by welding, so as to achieve fixation and sealing of the two.

[0080] More preferably, the housing 2 includes a first side 21 and a second side 22, the first side 21 and the second side 22 are arranged adjacent to each other, the first side 21 and the second side 22 are arranged around the opening, and the area of ​​the first side 21 is larger than the area of ​​the second side 22.

[0081] Preferably, the first side surface 21 and the second surface 12 are arranged opposite to each other, that is, the first side surface 21 and the second surface 12 are in the same plane, so that the electrolyte flowing into the second part 62 of the drainage groove 6 flows onto the first side surface 21, so that the electrolyte is away from the cover plate 1, effectively preventing contact with the electrode assembly 3 and preventing corrosion.

[0082] Those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this application and form different embodiments. For example, any of the claimed embodiments in the claims of this application can be used in any combination.

[0083] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A cover plate assembly, characterized by The cover plate includes a blocking piece between the liquid injection hole and the pole post assembly, and the cover plate is provided with a drainage groove on one side of the blocking piece in the width direction of the cover plate.

2. The cover plate assembly of claim 1, wherein, The drainage groove extends along the length direction of the cover plate.

3. The cover plate assembly of claim 1, wherein, The drainage groove is provided with two drainage grooves on both sides of the blocking piece.

4. The cover plate assembly of claim 3, wherein, The drainage groove is located on both sides of the pole post assembly.

5. The cover plate assembly of claim 4, wherein, The cover plate includes a first surface and a second surface located on one side of the cover plate in the width direction and adjacent to the first surface, the drainage groove includes a first part provided on the first surface and a second part provided on the second surface, and the first part and the second part are in communication.

6. The cover plate assembly of claim 5, wherein, The pole post assembly includes a pole post and an insulating frame covering the side surface of the pole post, and the blocking piece is located between the insulating frame and the liquid injection hole.

7. The cover plate assembly of claim 6, wherein, The blocking piece is integrally formed with the cover plate.

8. The cover plate assembly of claim 7, wherein, The blocking piece covers the side surface of the insulating frame.

9. The cover plate assembly of claim 8, wherein, The length of the drainage groove is greater than the length of the pole post assembly.

10. A battery, characterized by The cover plate assembly includes any one of claims 1-9.

Images