Anti-loose fastener for lithium battery cover plate

Abstract

The utility model discloses a kind of anti-loose fastener for lithium battery cover plate, it is related to lithium battery and its accessory technical field.The utility model includes battery shell;Counterweight assembly is further installed on cover plate body, counterweight hole is opened on the front side wall of cover plate body, counterweight assembly includes spring one placed in counterweight hole and counterweight rod inserted in counterweight hole, locking assembly is installed between ear plate one and ear plate two, locking assembly includes slide-in rod inserted on ear plate one and ear plate two, the lower side wall of slide-in rod is fixedly installed with fixed ring one, the upper side wall of slide-in rod is sleeved with fixed ring two, slide-in rod is connected with fixed ring two by spring rod, and threaded rod is further threadedly connected in the left and right two side walls of fixed ring two.The utility model can change the weight of cover plate body by counterweight assembly, and then better adapt battery shell, through locking assembly, not only improve the effect of connection stability between cover plate body and battery shell, but also facilitate cover plate body dismounting work to carry out.

Description

Technical Field

[0001] This utility model belongs to the technical field of lithium batteries and their accessories, and in particular relates to an anti-loosening fastener for lithium battery cover plates. Background Technology

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the positive / negative electrode material and a non-aqueous electrolyte solution. They are mainly composed of three parts: the battery casing, the battery cover, and the battery cell. The battery cover covers the top of the battery casing, while the battery cell is installed inside the battery casing. The battery casing and the battery cover protect the battery cell.

[0003] Chinese patent application CN222980635U discloses a simplified cover plate assembly and a lithium battery. The assembly includes a cover plate body with electrode lead-out holes, a limiting step extending circumferentially above or below the electrode lead-out holes, and positioning grooves at both ends of the electrode lead-out holes. An electrode post passes through the electrode lead-out holes, and its outer circumferential surface is a rough plane. A plastic part is located between the cover plate body and the electrode post, covering the limiting step, and female buckles are provided at both ends of the plastic part. An electrode through-hole is provided on the lower plastic bracket, and a first elastic arm and a second elastic arm are circumferentially arranged around the electrode through-hole. The ends of the first and second elastic arms are male buckles corresponding to the female buckles. The lithium battery also includes an electrode assembly and a casing. This invention significantly reduces the number of structural components in the cover plate assembly, simplifies the structure and assembly difficulty of the cover plate assembly and lithium battery, and improves the assembly yield of the cover plate assembly and lithium battery.

[0004] The aforementioned minimalist cover assembly and lithium battery have electrode through holes on both sides of the lower plastic bracket. A first elastic arm is fixedly mounted on the inner wall of one side of the electrode through hole, and a second elastic arm is mounted at the upper end of the first elastic arm. The first elastic arm on the lower plastic bracket is engaged with the housing through the second elastic arm. However, the contact area between the first and second elastic arms and the lower plastic bracket is relatively thin, and repeated manipulation of the first and second elastic arms during assembly and disassembly can easily cause them to break. Furthermore, the cover assembly has a double-layer structure, with the two layers stacked together. This stacking increases the overall thickness and weight of the cover, thus increasing the weight of the lithium battery. Therefore, we provide an anti-loosening fastener for a lithium battery cover to solve the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide an anti-loosening fastener for a lithium battery cover. The weight of the cover body can be changed by the counterweight component, thereby making it better fit the battery case. The locking component not only improves the connection stability between the cover body and the battery case, but also facilitates the disassembly of the cover body, thus solving the problems of the aforementioned minimalist cover assembly and lithium battery.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an anti-loosening fastener for a lithium battery cover, comprising a battery casing; a cover body is provided on the upper side wall of the battery casing, and ear plates are provided on the left and right side walls of the battery casing, and ear plates are provided on the left and right side walls of the cover body. A counterweight assembly is also installed on the cover body, and a counterweight hole is provided on the front side wall of the cover body. The counterweight assembly includes a spring placed in the counterweight hole and a counterweight rod inserted into the counterweight hole. A locking assembly is installed between the ear plates and the ear plates, and the locking assembly includes a sliding rod inserted into the ear plates. A fixing ring is fixedly installed on the lower side wall of the sliding rod, and a fixing ring is sleeved on the upper side wall of the sliding rod. A spring rod is also provided inside the sliding rod, and the sliding rod is connected to the fixing ring through the spring rod. Threaded rods are also threadedly connected to the left and right side walls of the fixing ring.

[0008] The present invention is further configured such that a sealing groove is provided on the upper side wall of the battery casing, and a sealing ring is fixedly provided on the bottom side wall of the cover plate body, and the cover plate body is inserted into the sealing groove through the sealing ring.

[0009] The present invention is further configured such that the first ear plate has a first plate hole, the second ear plate has a second plate hole, and screw sleeves are fixedly provided on the left and right sides of the second plate hole and the upper side wall of the second ear plate.

[0010] The present invention is further configured such that the sliding rod is slidably inserted into the first plate hole and the second plate hole, the first fixing ring is disposed below the first ear plate, and the second spring is sleeved on the outer wall of the sliding rod, and the second spring is disposed between the first ear plate and the first fixing ring.

[0011] The present invention is further configured such that the sliding rod has a rod groove inside, the fixing ring two has a sliding plate inside, the sliding plate is slidably connected to the rod groove, the bottom side wall of the spring rod is connected to the inner wall of the bottom side wall of the rod groove, and the top side wall of the spring rod is connected to the bottom side wall of the sliding plate.

[0012] The present invention is further configured such that screw holes are provided on the left and right sides of the second fixing ring, and the screw holes and the screw sleeve are arranged opposite each other vertically. The threaded rod is threadedly connected to both the screw hole and the screw sleeve, and a pull ring is fixedly installed on the upper side wall of the threaded rod.

[0013] The present invention is further configured such that a plurality of counterweight holes are provided, the plurality of counterweight holes are equally spaced apart, and a threaded groove is provided in the outer end sidewall of the counterweight hole.

[0014] The present invention is further configured such that the outer end of the counterweight rod is provided with a threaded head, and the threaded head is threadedly connected to the threaded groove at the outer end of the counterweight hole.

[0015] This utility model has the following beneficial effects:

[0016] 1. This utility model comprises a cover plate body and a counterweight assembly. The cover plate body has counterweight holes spaced at equal intervals, and a counterweight assembly is installed in each counterweight hole. The counterweight assembly includes a spring placed in the counterweight hole and a counterweight rod inserted into the counterweight hole. The end of the counterweight rod is also provided with a threaded head. The counterweight rod is connected to the threaded groove at the end of the counterweight hole through the threaded head. In use, the spring is first inserted into the counterweight hole of the cover plate body, and then the counterweight rod is inserted into the counterweight hole. Due to the presence of the spring, the counterweight rod cannot be fully inserted into the counterweight hole under normal conditions. At this time, the counterweight rod is pushed, the spring is compressed, and after the threaded head enters the counterweight hole, the counterweight rod is rotated. At this time, the threaded head connects with the threaded groove at the end of the counterweight hole, thereby fixing the counterweight rod. When removing the counterweight rod, simply rotate the counterweight rod in the opposite direction to disengage the threaded head from the threaded groove at the end of the counterweight hole. Then, under the action of the spring, the end of the counterweight rod is pushed out of the counterweight hole, making it easy to remove the counterweight rod.

[0017] 2. This utility model comprises a battery casing, a cover plate body, and a locking assembly. The upper side wall of the battery casing has a sealing groove, and the bottom side wall of the cover plate body has a sealing ring that is inserted into the sealing groove. Ear plates one are provided on the left and right side walls of the battery casing, and ear plates two are provided on the left and right side walls of the cover plate body. A locking assembly is installed between ear plates one and ear plates two. The locking assembly includes a sliding rod that is slidably inserted into ear plates one and two. A fixing ring one is fixedly installed at the lower end of the sliding rod, and a fixing ring two is slidably sleeved at the upper end. A rod groove is provided inside the sliding rod. A sliding plate is fixedly installed on the inner wall of the fixing ring two, and the sliding plate is slidably connected to the rod groove. A spring two is sleeved on the outer wall of the sliding rod, and a spring rod is installed in the rod groove. The elastic force of the spring rod is greater than that of the spring two. The two sides of the fixing ring two are also threaded together. The device has a threaded rod that passes through the fixing ring two and connects to the ear plate two. In use, first, fix the fixing ring one to the bottom side wall of the sliding rod. Then, sleeve the spring two onto the sliding rod. Next, insert the sliding rod from below the ear plate one and pass it out from above the ear plate two, fixing the spring rod into the groove of the sliding rod. At this point, the end of the spring rod is not under force and is in a naturally extended state. Then, align the sliding plate on the fixing ring two with the groove of the sliding rod and press down on the fixing ring two. At this point, the sliding plate exerts pressure on the spring rod, causing it to retract until it is compressed to its minimum state. Then, insert the threaded rod from above the fixing ring two until its bottom is locked into the threaded sleeve of the ear plate two. This completes the fixing of the cover body to the upper side wall of the battery casing and also ensures the cover body is not loosened. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a schematic diagram of the structure of an anti-loosening fastener for a lithium battery cover.

[0020] Figure 2 This is a schematic diagram of the battery casing.

[0021] Figure 3 A schematic diagram of the cover plate body. Figure 1 .

[0022] Figure 4 This is a structural disassembly diagram of the cover plate body and the counterweight assembly.

[0023] Figure 5 A schematic diagram of the cover plate body. Figure 2 .

[0024] Figure 6 This is a structural disassembly diagram of the locking assembly.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1-Battery casing, 101-Sealing groove, 102-Ear plate one, 102a-Plate hole one, 2-Cover plate body, 201-Sealing ring, 202-Ear plate two, 202a-Plate hole two, 202b-Threaded sleeve, 203-Counterweight hole, 3-Counterweight assembly, 301-Counterweight rod, 302-Threaded head, 303-Spring one, 4-Locking assembly, 401-Sliding rod, 401a-Rod groove, 402-Spring two, 403-Fixing ring one, 404-Fixing ring two, 404a-Sliding plate, 404b-Threaded hole, 405-Spring rod, 406-Threaded rod, 406a-Pull ring. Detailed Implementation

[0027] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0028] Example 1

[0029] Please see Figure 1-3 This utility model is an anti-loosening fastener for a lithium battery cover, including a battery shell 1 and a cover body 2. The cover body 2 can cover the upper end of the battery shell 1 to seal the battery shell 1.

[0030] Specifically, a sealing groove 101 is provided on the upper side wall of the battery casing 1, and a sealing ring 201 is provided on the bottom side wall of the cover body 2, and the sealing ring 201 is inserted into the sealing groove 101.

[0031] Furthermore, ear plates 102 are fixedly installed on the upper ends of the left and right side walls of the battery casing 1, and ear plates 202 are fixedly installed on the lower ends of the left and right side walls of the cover body 2.

[0032] Example 2

[0033] Please see Figure 4 Based on embodiment 1, a cover plate body 2 is also provided. The weight of the cover plate body 2 can be changed by the counterweight component 3, so as to better fit the battery case 1.

[0034] Specifically, a counterweight hole 203 is provided in the front side wall of the cover plate body 2. There are multiple counterweight holes 203, which are equally spaced and a counterweight component 3 is installed in the counterweight hole 203.

[0035] Furthermore, the counterweight assembly 3 includes a spring 303 placed in the counterweight hole 203 and a counterweight rod 301 inserted into the counterweight hole 203. The outer end of the counterweight rod 301 is also provided with a threaded head 302, which is threadedly connected to the threaded groove at the outer end of the counterweight hole 203.

[0036] The operation process of this embodiment is as follows: In use, firstly, spring 303 is inserted into the counterweight hole 203 of the cover plate body 2, and then counterweight rod 301 is inserted into the counterweight hole 203. Due to the presence of spring 303, counterweight rod 301 cannot be fully inserted into counterweight hole 203 under natural conditions. At this time, push counterweight rod 301, spring 303 is compressed by force, and after threaded head 302 enters counterweight hole 203, rotate counterweight rod 301. At this time, threaded head 302 connects with the threaded groove at the end of counterweight hole 203, thereby fixing counterweight rod 301. When removing counterweight rod 301, simply rotate counterweight rod 301 in the opposite direction to disengage threaded head 302 from threaded groove at the end of counterweight hole 203. Then, under the action of spring 303, the end of counterweight rod 301 is pushed out of counterweight hole 203, making it easy to remove counterweight rod 301.

[0037] Example 3

[0038] Please see Figure 5-6 Based on Embodiments 1 and 2, a locking component 4 is also provided. The locking component 4 not only improves the connection stability between the cover body 2 and the battery case 1, but also facilitates the disassembly of the cover body 2.

[0039] Specifically, the first ear plate 102 has a first plate hole 102a, the second ear plate 202 has a second plate hole 202a, and the two sides of the second plate hole 202a and the upper side wall of the second ear plate 202 are also fixedly installed with screw sleeves 202b. The locking assembly 4 includes a sliding rod 401 inserted into the first plate hole 102a and the second plate hole 202a. A first fixing ring 403 is fixedly installed on the bottom side wall of the sliding rod 401, a second fixing ring 404 is sleeved on the upper side wall, and a second spring 402 is sleeved on the lower end of the sliding rod 401.

[0040] Furthermore, the sliding rod 401 has a rod groove 401a inside, and the fixing ring 404 has a sliding plate 404a inside, which slides in conjunction with the rod groove 401a. A spring rod 405 is also installed inside the rod groove 401a, and the upper side wall of the spring rod 405 is connected to the bottom side wall of the sliding plate 404a. The left and right side walls of the fixing ring 404 have screw holes 404b, which are arranged vertically opposite to the screw sleeve 202b. A threaded rod 406 is threaded into the screw hole 404b, and a pull ring 406a is fixedly installed at the upper end of the threaded rod 406, and the lower end is threadedly connected to the screw sleeve 202b.

[0041] The operation process of this embodiment is as follows: First, fix the first fixing ring 403 to the bottom side wall of the sliding rod 401. Then, the second spring 402 is sleeved on the sliding rod 401. Next, insert the sliding rod 401 from below the first ear plate 102 and pass it out from above the second ear plate 202. Fix the spring rod 405 into the rod groove 401a of the sliding rod 401. At this time, the end of the spring rod 405 is not under force, i.e., it is in a naturally extended state. Then, fix the second fixing ring 404... Align the sliding plate 404a with the groove 401a of the sliding rod 401 and press down the fixing ring 404. At this time, the sliding plate 404a will exert pressure on the spring rod 405 and cause the spring rod 405 to retract under force until the spring rod 405 is compressed to the minimum state. Then, insert the threaded rod 406 from above the fixing ring 404 until its bottom is locked into the screw sleeve 202b of the ear plate 202. This completes the fixing of the cover body 2 to the upper side wall of the battery case 1.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A locking fastener for a lithium battery cover, comprising a battery casing (1); characterized in that: The upper side wall of the battery casing (1) is covered with a cover plate body (2). The left and right side walls of the battery casing (1) are provided with ear plates one (102), and the left and right side walls of the cover plate body (2) are provided with ear plates two (202). A counterweight assembly (3) is also installed on the cover plate body (2). A counterweight hole (203) is opened on the front side wall of the cover plate body (2). The counterweight assembly (3) includes a spring one (303) placed in the counterweight hole (203) and a counterweight rod (301) inserted into the counterweight hole (203). The ear plates one (102) and ear plates two (202) are also provided. A locking assembly (4) is installed between the two. The locking assembly (4) includes a sliding rod (401) inserted into the first ear plate (102) and the second ear plate (202). A fixing ring (403) is fixedly installed on the lower side wall of the sliding rod (401), and a fixing ring (404) is sleeved on the upper side wall of the sliding rod (401). A spring rod (405) is also provided inside the sliding rod (401), and the sliding rod (401) is connected to the fixing ring (404) through the spring rod (405). Threaded rods (406) are also threadedly connected to the left and right side walls of the fixing ring (404).

2. The anti-loosening fastener for a lithium battery cover according to claim 1, characterized in that, The upper side wall of the battery case (1) is provided with a sealing groove (101), and a sealing ring (201) is fixedly provided on the bottom side wall of the cover plate body (2). The cover plate body (2) is inserted into the sealing groove (101) through the sealing ring (201).

3. The anti-loosening fastener for a lithium battery cover according to claim 1, characterized in that, The first ear plate (102) has a first plate hole (102a), the second ear plate (202) has a second plate hole (202a), and screw sleeves (202b) are fixedly provided on the left and right sides of the second plate hole (202a) and the upper side wall of the second ear plate (202).

4. The anti-loosening fastener for a lithium battery cover according to claim 3, characterized in that, The sliding rod (401) is slidably inserted into the first plate hole (102a) and the second plate hole (202a). The first fixing ring (403) is located below the first ear plate (102). The second spring (402) is also sleeved on the outer wall of the sliding rod (401), and the second spring (402) is located between the first ear plate (102) and the first fixing ring (403).

5. The anti-loosening fastener for a lithium battery cover according to claim 1, characterized in that, The sliding rod (401) has a rod groove (401a) inside, and the fixed ring 2 (404) has a sliding plate (404a) inside. The sliding plate (404a) is slidably connected to the rod groove (401a). The bottom side wall of the spring rod (405) is connected to the inner wall of the bottom side wall of the rod groove (401a), and the top side wall of the spring rod (405) is connected to the bottom side wall of the sliding plate (404a).

6. The anti-loosening fastener for a lithium battery cover according to claim 3, characterized in that, The second fixing ring (404) has screw holes (404b) on its left and right sides, and the screw holes (404b) and the screw sleeve (202b) are arranged opposite each other vertically. The threaded rod (406) is threadedly connected to both the screw hole (404b) and the screw sleeve (202b), and a pull ring (406a) is fixedly installed on the upper side wall of the threaded rod (406).

7. The anti-loosening fastener for a lithium battery cover according to claim 1, characterized in that, Multiple counterweight holes (203) are provided, and the multiple counterweight holes (203) are equally spaced, and a threaded groove is provided in the outer end sidewall of the counterweight hole (203).

8. The anti-loosening fastener for a lithium battery cover according to claim 7, characterized in that, The outer end of the counterweight rod (301) is provided with a threaded head (302), and the threaded head (302) is threadedly connected to the threaded groove at the outer end of the counterweight hole (203).

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