Lithium battery liquid injection sealing structure

Abstract

The utility model discloses a lithium battery liquid injection sealing structure which comprises a lithium battery shell and a lithium battery cover plate, a containing groove is formed in the left side of the top of the lithium battery cover plate, a liquid injection hole is formed in the bottom of the containing groove, a soft sealing piece is arranged in an inner cavity of the liquid injection hole, and a fixing device is arranged on the rear side of the inner cavity of the containing groove. A control device is arranged on the front side of an inner cavity of the containing groove. According to the utility model, the soft sealing element, the sealing plug, the fixing device and the control device are matched for use, the sealing plug is used for sealing the soft sealing element, the fixing device is used for fixing the sealing plug, and the control device is used for controlling the fixing device; in the prior art, a liquid injection hole is sealed in a welding mode, the welding quality is unstable due to the fact that the liquid injection hole is easily influenced by heat in the welding process, and the liquid leakage phenomenon possibly occurs in the subsequent use process if the welding is not firm, so that the performance and the safety of the battery are influenced are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery liquid injection, and particularly relates to a lithium battery liquid injection sealing structure. Background Technique

[0002] A lithium battery is a battery that uses lithium metal or lithium alloy as the negative electrode material and a non-aqueous electrolyte solution. Lithium batteries usually have characteristics such as high energy density, high voltage, low self-discharge rate, and long service life, and are widely used in portable electronic devices and energy storage devices such as mobile phones, laptop computers, and electric vehicles. With the continuous progress of technology, the performance of lithium batteries has been continuously improved, and the application fields have also been continuously expanded. The problems existing in the prior art are as follows: After the existing lithium batteries are filled with liquid, most of them seal the liquid injection holes by welding. During the welding process, it is easily affected by heat, resulting in unstable welding quality. If the welding is not firm, liquid leakage may occur during subsequent use, affecting the performance and safety of the battery. Content of the Utility Model

[0003] Aiming at the problems existing in the prior art, the utility model provides a lithium battery liquid injection sealing structure, which has the advantage of sealing the lithium battery liquid injection hole through a sealing plug. Aiming at the problems that after the existing lithium batteries are filled with liquid, most of them seal the liquid injection holes by welding. During the welding process, it is easily affected by heat, resulting in unstable welding quality. If the welding is not firm, liquid leakage may occur during subsequent use, affecting the performance and safety of the battery, the problem has been improved.

[0004] The utility model is realized as follows: A lithium battery liquid injection sealing structure includes a lithium battery housing and a lithium battery cover plate. The lithium battery cover plate is arranged on the top of the lithium battery housing. A receiving groove is opened on the left side of the top of the lithium battery cover plate. A liquid injection hole is opened at the bottom of the receiving groove. A soft sealing member is arranged in the inner cavity of the liquid injection hole. A sealing plug is arranged in the inner cavity of the soft sealing member. A fixing device for cooperating with the sealing plug is arranged at the rear side of the inner cavity of the receiving groove. A control device for cooperating with the fixing device is arranged at the front side of the inner cavity of the receiving groove.

[0005] Preferably, one side of the soft sealing member close to the inner wall of the liquid injection hole is fixedly connected to the inner wall of the liquid injection hole. The bottom of the soft sealing member passes through the liquid injection hole and extends into the inner cavity of the lithium battery housing.

[0006] Preferably, one side of the sealing plug close to the soft sealing member is in contact with the soft sealing member.

[0007] Preferably, the fixing device includes two limiting columns. Reset springs are sleeved on both the left and right sides of the curved surface of the limiting columns. Fixing plates are arranged on the opposite sides of the two reset springs, and the bottom of the fixing plate contacts the sealing plug.

[0008] Preferably, the control device includes a control switch. A control gear is arranged at the bottom of the control switch. A support column is arranged on the front side of the control gear. A control rack is sleeved on the surface of the support column. A transmission gear is arranged at the bottom of the control rack. A control screw rod is arranged on the rear side of the transmission gear. A push plate is sleeved on the surface of the control screw rod. Control connecting rods are arranged on both the left and right sides of the top of the push plate.

[0009] Preferably, both the left and right sides of the limiting column are fixedly connected to the inner wall of the accommodating groove, and the left and right sides of the reset spring are respectively fixedly connected to the inner wall of the accommodating groove and the fixing plate.

[0010] Preferably, the bottom of the control switch penetrates through the lithium battery cover plate and extends into the inner cavity of the accommodating groove to be fixedly connected to the control gear. The front side of the control gear meshes with the control rack. Both the left and right sides of the support column are fixedly connected to the inner wall of the accommodating groove. The bottom of the control rack meshes with the transmission gear. The front side of the transmission gear is rotationally connected to the inner wall of the accommodating groove through a rotating shaft. The control screw rod is in threaded connection with the push plate. One side of the control connecting rod close to the push plate is rotationally connected to the push plate through a rotating shaft. The side of the control connecting rod far from the push plate is rotationally connected to the fixing plate through a rotating shaft.

[0011] 1. By the combined use of the soft sealing member, the sealing plug, the fixing device and the control device, the sealing plug seals the soft sealing member, the fixing device fixes the sealing plug, and the control device controls the fixing device. This improves the problem that for existing lithium batteries, after the liquid injection is completed, the liquid injection hole is mostly sealed by welding. During the welding process, it is easily affected by heat, resulting in unstable welding quality. If the welding is not firm, there may be a liquid leakage phenomenon during subsequent use, affecting the performance and safety of the battery.

[0012] 2. By providing the liquid injection hole, the lithium battery can be filled with liquid, which is convenient for the user to use the lithium battery.

[0013] 3. By providing the sealing plug and the soft sealing member, the liquid injection hole can be sealed, which is convenient for the user to use the lithium battery.

[0014] 4. By providing the fixing device, the sealing plug can be fixed, which is convenient for the user to use the sealing plug.

[0015] 5. The utility model can control the fixing device by setting a control device, which is convenient for users to use the fixing device.

[0016] 6. The utility model can support and limit the reset spring and the fixing plate by setting a limit post, can reset the fixing plate by setting a reset spring, and can fix the sealing plug by setting a fixing plate.

[0017] 7. The utility model can drive the control gear to rotate by setting a control switch, can drive the control rack to move by setting a control gear, can support and limit the control rack by setting a support post, can drive the transmission gear to rotate by setting a control rack, can drive the control screw rod to rotate by setting a transmission gear, can drive the push plate to move by setting a control screw rod, can drive the control connecting rod to rotate by setting a push plate, and can drive the fixing plate to move by setting a control connecting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall three-dimensional structural schematic diagram provided by the embodiment of the utility model;

[0019] Figure 2 is the partial cross-sectional view of the lithium battery cover plate provided by the embodiment of the utility model;

[0020] Figure 3 is provided by the embodiment of the utility model Figure 2 Enlarged view of A;

[0021] Figure 4 is the three-dimensional structural schematic diagram of the accommodating groove and the liquid injection hole provided by the embodiment of the utility model;

[0022] Figure 5 is the three-dimensional structural schematic diagram of the soft sealing member and the sealing plug provided by the embodiment of the utility model;

[0023] Figure 6 is the three-dimensional structural schematic diagram of the fixing device and the control device provided by the embodiment of the utility model.

[0024] In the figure: 1. Lithium battery housing; 2. Lithium battery cover plate; 3. Accommodating groove; 4. Liquid injection hole; 5. Soft sealing member; 6. Sealing plug; 7. Fixing device; 8. Control device; 701. Limit post; 702. Reset spring; 703. Fixing plate; 801. Control switch; 802. Control gear; 803. Support post; 804. Control rack; 805. Transmission gear; 806. Control screw rod; 807. Push plate; 808. Control connecting rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to further understand the inventive content, features and effects of the present utility model, the following embodiments are cited and described in detail with reference to the accompanying drawings as follows.

[0026] The structure of the present utility model will be described in detail below with reference to the accompanying drawings.

[0027] As Figures 1 to 6 shown, a lithium battery liquid injection sealing structure provided by an embodiment of the present utility model includes a lithium battery housing 1 and a lithium battery cover plate 2. The lithium battery cover plate 2 is disposed on the top of the lithium battery housing 1. A receiving groove 3 is opened on the left side of the top of the lithium battery cover plate 2. A liquid injection hole 4 is opened at the bottom of the receiving groove 3. A soft sealing member 5 is disposed in the inner cavity of the liquid injection hole 4. A sealing plug 6 is disposed in the inner cavity of the soft sealing member 5. A fixing device 7 for cooperating with the sealing plug 6 is disposed at the rear side of the inner cavity of the receiving groove 3. A control device 8 for cooperating with the fixing device 7 is disposed at the front side of the inner cavity of the receiving groove 3.

[0028] Referring to Figure 3 、 Figure 4 and Figure 5 , one side of the soft sealing member 5 close to the inner wall of the liquid injection hole 4 is fixedly connected to the inner wall of the liquid injection hole 4. The bottom of the soft sealing member 5 passes through the liquid injection hole 4 and extends into the inner cavity of the lithium battery housing 1.

[0029] By adopting the above scheme: by providing the liquid injection hole 4, the lithium battery can be injected with liquid, which is convenient for the user to use the lithium battery.

[0030] Referring to Figure 5 , one side of the sealing plug 6 close to the soft sealing member 5 is in contact with the soft sealing member 5.

[0031] By adopting the above scheme: by providing the sealing plug 6 and the soft sealing member 5, the liquid injection hole 4 can be sealed, which is convenient for the user to use the lithium battery.

[0032] Referring to Figure 5 and Figure 6 , the fixing device 7 includes two limit posts 701. A return spring 702 is sleeved on both the left side and the right side of the curved surface of the limit post 701. A fixing plate 703 is disposed on one side of the two return springs 702 facing each other. The bottom of the fixing plate 703 is in contact with the sealing plug 6.

[0033] By adopting the above scheme: by providing the fixing device 7, the sealing plug 6 can be fixed, which is convenient for the user to use the sealing plug 6.

[0034] Referring to Figure 6, the control device 8 includes a control switch 801. A control gear 802 is provided at the bottom of the control switch 801. A support column 803 is provided on the front side of the control gear 802. A control rack 804 is sleeved on the surface of the support column 803. A transmission gear 805 is provided at the bottom of the control rack 804. A control lead screw 806 is provided on the rear side of the transmission gear 805. A push plate 807 is sleeved on the surface of the control lead screw 806. Control linkages 808 are provided on both the left and right sides at the top of the push plate 807.

[0035] Adopting the above solution: By providing the control device 8, it is possible to control the fixing device 7, facilitating the user's use of the fixing device 7.

[0036] Reference Figure 3 and Figure 6 , both the left and right sides of the limit post 701 are fixedly connected to the inner wall of the receiving groove 3. The left and right sides of the return spring 702 are respectively fixedly connected to the inner wall of the receiving groove 3 and the fixing plate 703.

[0037] Adopting the above solution: By providing the limit post 701, it is possible to support and limit the return spring 702 and the fixing plate 703. By providing the return spring 702, it is possible to reset the fixing plate 703. By providing the fixing plate 703, it is possible to fix the sealing plug 6.

[0038] Reference Figure 3 and Figure 6 , the bottom of the control switch 801 penetrates through the lithium battery cover plate 2 and extends into the inner cavity of the receiving groove 3 to be fixedly connected to the control gear 802. The front side of the control gear 802 meshes with the control rack 804. Both the left and right sides of the support column 803 are fixedly connected to the inner wall of the receiving groove 3. The bottom of the control rack 804 meshes with the transmission gear 805. The front side of the transmission gear 805 is rotatably connected to the inner wall of the receiving groove 3 through a rotating shaft. The control lead screw 806 is threadedly connected to the push plate 807. The side of the control linkage 808 close to the push plate 807 is rotatably connected to the push plate 807 through a rotating shaft. The side of the control linkage 808 away from the push plate 807 is rotatably connected to the fixing plate 703 through a rotating shaft.

[0039] Adopting the above solution: By setting the control switch 801, it can drive the control gear 802 to rotate. By setting the control gear 802, it can drive the control rack 804 to move. By setting the support column 803, it can support and limit the control rack 804. By setting the control rack 804, it can drive the transmission gear 805 to rotate. By setting the transmission gear 805, it can drive the control lead screw 806 to rotate. By setting the control lead screw 806, it can drive the push plate 807 to move. By setting the push plate 807, it can drive the control link 808 to rotate. By setting the control link 808, it can drive the fixed plate 703 to move.

[0040] During use, rotate the control switch 801 to drive the control gear 802 to rotate. The control gear 802 drives the control rack 804 to move on the surface of the support column 803. The control rack 804 drives the transmission gear 805 to rotate. The transmission gear 805 drives the control lead screw 806 to rotate. The control lead screw 806 drives the push plate 807 to move. The push plate 807 drives the control link 808 to rotate. The control link 808 drives the fixed plate 703 to move on the surface of the limit post 701 and compresses the return spring 702. When the fixed plate 703 is opened, the liquid is injected into the inner cavity of the lithium battery housing 1 through the flexible seal 5. After the liquid injection is completed, the sealing plug 6 is placed into the inner cavity of the flexible seal 5. Release the control switch 801. The force released after the return spring 702 is compressed drives the fixed plate 703 to move in the reverse direction on the surface of the limit post 701. When the fixed plate 703 contacts the sealing plug 6, it will push the sealing plug 6 to descend and compress the flexible seal 5 to seal the liquid injection hole 4. At the same time, the fixed plate 703 drives the control link 808 to rotate in the reverse direction. The control link 808 drives the push plate 807 to move in the reverse direction. The push plate 807 drives the control lead screw 806 and the transmission gear 805 to rotate synchronously in the reverse direction. The transmission gear 805 drives the control rack 804 to move in the reverse direction on the surface of the support column 803. The control rack 804 drives the control rack 804 and the control switch 801 to move in the reverse direction and reset synchronously, completing the sealing.

[0041] To sum up: For this lithium battery liquid injection and sealing structure, through the combined use of the flexible seal 5, the sealing plug 6, the fixing device 7 and the control device 8, the sealing plug 6 seals the flexible seal 5, the fixing device 7 fixes the sealing plug 6, and the control device 8 controls the fixing device 7. Aiming at the problem that for existing lithium batteries, after the liquid injection is completed, the liquid injection hole is mostly sealed by welding. During the welding process, it is easily affected by heat, resulting in unstable welding quality. If the welding is not firm, there may be a liquid leakage phenomenon during subsequent use, affecting the performance and safety of the battery, improvements have been made.

[0042] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device.

[0043] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A liquid injection and sealing structure for a lithium battery, comprising a lithium battery housing (1) and a lithium battery cover plate (2), the lithium battery cover plate (2) being arranged on the top of the lithium battery housing (1), characterized in that: A receiving groove (3) is formed on the left side of the top of the lithium battery cover plate (2). A liquid injection hole (4) is formed at the bottom of the receiving groove (3). A soft seal (5) is arranged in the inner cavity of the liquid injection hole (4). A sealing plug (6) is arranged in the inner cavity of the soft seal (5). A fixing device (7) used in cooperation with the sealing plug (6) is arranged at the rear side of the inner cavity of the receiving groove (3). A control device (8) used in cooperation with the fixing device (7) is arranged at the front side of the inner cavity of the receiving groove (3).

2. The liquid injection and sealing structure of a lithium battery according to claim 1, wherein: One side of the soft seal (5) close to the inner wall of the liquid injection hole (4) is fixedly connected with the inner wall of the liquid injection hole (4). The bottom of the soft seal (5) passes through the liquid injection hole (4) and extends into the inner cavity of the lithium battery housing (1).

3. A lithium battery liquid injection and sealing structure according to claim 1, characterized in that: One side of the sealing plug (6) close to the soft seal (5) is in contact with the soft seal (5).

4. A liquid injection and sealing structure of a lithium battery according to claim 1, characterized in that: The fixing device (7) includes two limit posts (701). Return springs (702) are sleeved on the left side and the right side of the curved surface of the limit posts (701). Fixing plates (703) are arranged on the opposite sides of the two return springs (702). The bottom of the fixing plate (703) is in contact with the sealing plug (6).

5. A liquid injection and sealing structure for a lithium battery according to claim 1, characterized in that: The control device (8) includes a control switch (801). A control gear (802) is arranged at the bottom of the control switch (801). A support post (803) is arranged at the front side of the control gear (802). A control rack (804) is sleeved on the surface of the support post (803). A transmission gear (805) is arranged at the bottom of the control rack (804). A control lead screw (806) is arranged at the rear side of the transmission gear (805). A push plate (807) is sleeved on the surface of the control lead screw (806). Control connecting rods (808) are arranged on the left side and the right side of the top of the push plate (807).

6. The liquid injection and sealing structure of a lithium battery according to claim 4, wherein: The left side and the right side of the limit posts (701) are fixedly connected with the inner wall of the receiving groove (3). The left side and the right side of the return springs (702) are respectively fixedly connected with the inner wall of the receiving groove (3) and the fixing plate (703).

7. A lithium battery liquid injection sealing structure according to claim 5, characterized in that: The bottom of the control switch (801) penetrates through the lithium battery cover plate (2) and extends into the inner cavity of the receiving groove (3) to be fixedly connected with the control gear (802). The front side of the control gear (802) is meshed with the control rack (804). The left side and the right side of the support post (803) are fixedly connected with the inner wall of the receiving groove (3). The bottom of the control rack (804) is meshed with the transmission gear (805). The front side of the transmission gear (805) is rotationally connected with the inner wall of the receiving groove (3) through a rotating shaft. The control lead screw (806) is in threaded connection with the push plate (807). One side of the control connecting rod (808) close to the push plate (807) is rotationally connected with the push plate (807) through a rotating shaft. One side of the control connecting rod (808) far away from the push plate (807) is rotationally connected with the fixing plate (703) through a rotating shaft.

Images