Battery

Abstract

The utility model discloses a battery which comprises a cylinder body, a central shaft, a screw and a connecting structure, two ends of the cylinder body are respectively provided with a first end cover and a second end cover, the cylinder body, the first end cover and the second end cover define an accommodating space, a battery core assembly is arranged in the accommodating space, the first end cover is provided with a liquid injection hole, the central shaft penetrates through the battery core assembly, and the screw is connected with the central shaft. The screw penetrates through the liquid injection hole and is in threaded connection with the central shaft to block the liquid injection hole, and the connecting structure is used for fixing the screw, so that the electrolyte can be prevented from leaking from the liquid injection hole due to loosening of the screw, and the use safety of the battery can be improved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery. Background Technology

[0002] During battery manufacturing, electrolyte filling is required. Current methods often involve creating a filling hole at the top of the battery casing, injecting electrolyte through this hole, and then sealing the hole with screws. However, over time, these screws can loosen, causing electrolyte leakage and compromising battery safety. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a battery that provides safety in battery use.

[0004] The battery according to an embodiment of the present invention includes:

[0005] A cylindrical body, with a first end cap and a second end cap respectively at both ends of the cylindrical body, the first end cap and the second end cap defining an accommodating space, a battery cell assembly being provided in the accommodating space, and the first end cap being provided with a liquid injection hole;

[0006] The central shaft passes through the battery cell assembly;

[0007] A screw is inserted through the injection hole and threaded to the central shaft to seal the injection hole;

[0008] A connecting structure for securing the screw.

[0009] The battery according to the embodiments of this utility model has at least the following beneficial effects:

[0010] By designing a connecting structure, the screw cannot rotate relative to the central axis. After prolonged use, the screw can stably seal the electrolyte injection hole, preventing leakage of electrolyte from the injection hole due to screw loosening, thus improving battery safety. According to some embodiments of this invention, the connecting structure includes an abutment and an annular protrusion on the first end cap. Along the axial direction of the injection hole, the annular protrusion surrounds the outer periphery of the injection hole. The abutment covers the screw and connects to the annular protrusion, abutting against the screw.

[0011] According to some embodiments of the present invention, the abutment member is provided with a first external thread, and the annular protrusion is provided with a first internal thread that matches the first external thread.

[0012] According to some embodiments of the present invention, the annular protrusion and the first end cap are an integral structure.

[0013] According to some embodiments of the present invention, the abutting member includes a connecting portion and an abutting portion connected to the connecting portion. The connecting portion is arranged around the outer periphery of the abutting portion, the first external thread is provided on the connecting portion, and the abutting portion abuts against the screw.

[0014] According to some embodiments of the present invention, the abutting part and the connecting part are an integral structure.

[0015] According to some embodiments of the present invention, a safety valve is also included, wherein the second end cap is provided with a through hole, and the safety valve is disposed on the second end cap and covers the through hole.

[0016] According to some embodiments of the present invention, the first end cap is provided with a connector for connecting the second end cap of another battery.

[0017] According to some embodiments of the present invention, the first end cap is provided with a second internal thread, the second end cap is provided with a third internal thread, the connector is provided with a second external thread that matches the second internal thread, and the connector is provided with a third external thread that matches the third internal thread.

[0018] According to some embodiments of the present invention, the central shaft is hollow to form a channel, the channel is connected to the injection hole, and the side wall of the channel is provided with multiple through holes, the through holes penetrating the central shaft.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0021] Figure 1 This is a schematic diagram of the battery structure according to an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the battery according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 A magnified view of part A in the middle.

[0024] Figure label:

[0025] Cylinder 100, first end cap 200, injection hole 210, annular protrusion 220, second internal thread 230, second end cap 300, third internal thread 310, battery cell assembly 400, central shaft 500, channel 510, through hole 520, screw 600, abutment 700, connecting part 710, abutment part 720, safety valve 800. Detailed Implementation

[0026] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0027] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0029] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0030] In related technologies, electrolyte filling is required during battery production. Current methods often involve creating a filling hole at the top of the battery casing, injecting electrolyte into the battery through this hole, and then sealing the hole with screws. However, over time, these screws can loosen, causing electrolyte leakage and compromising battery safety.

[0031] Based on this, refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the battery structure according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the internal structure of the battery according to an embodiment of the present invention. Figure 3for Figure 2 A partial enlarged view of part A. The battery according to this embodiment includes a cylindrical body 100, a central shaft 500, a screw 600, and a connecting structure. The cylindrical body 100 has a first end cap 200 and a second end cap 300 at both ends, defining an accommodating space. A cell assembly 400 is disposed within the accommodating space. The first end cap 200 has an electrolyte injection hole 210. The central shaft 500 passes through the cell assembly 400. The screw 600 passes through the electrolyte injection hole 210 and is threadedly connected to the central shaft 500 to seal the electrolyte injection hole 210. The connecting structure is used to fix the screw 600. This prevents the screw 600 from loosening and causing electrolyte leakage from the electrolyte injection hole 210, thus improving the battery's safety.

[0032] Specifically, by setting up a connection structure, the screw 600 cannot rotate relative to the central shaft 500. After long-term use, the screw 600 can stably seal the electrolyte injection hole 210 to prevent the electrolyte from leaking from the electrolyte injection hole 210 due to loosening of the screw 600, thereby improving the safety of battery use.

[0033] It should be noted that in this embodiment, the battery is a cylindrical battery, and the cross-section of the cylinder 100 is circular in the direction perpendicular to the axial direction of the cylinder 100. Of course, in other specific embodiments, the cross-section of the cylinder 100 in the direction perpendicular to the axial direction of the cylinder 100 can also be rectangular, and this is not a limitation.

[0034] In some embodiments of this utility model, the connecting structure includes an abutment 700 and an annular protrusion 220 disposed on the first end cap 200. Along the axial direction of the injection hole 210, the annular protrusion 220 is arranged around the outer periphery of the injection hole 210. The abutment 700 covers the screw 600 and is connected to the annular protrusion 220. The abutment 700 abuts against the screw 600, which can prevent the screw 600 from loosening and causing electrolyte to leak from the injection hole 210, thereby improving the safety of battery use.

[0035] Specifically, along the axial direction perpendicular to the cylinder 100, the annular protrusion 220 has a circular structure. The annular protrusion 220 is coaxially arranged with the liquid injection hole 210, and the liquid injection hole 210 is located inside the annular protrusion 220. After the liquid injection is completed, the screw 600 is threaded into the central shaft 500 so that the nut of the screw 600 seals the liquid injection hole 210. Then, the abutment 700 is threaded into the annular protrusion 220. Rotating the abutment 700 causes the abutment 700 to abut against the nut of the screw 600, which can restrict the movement of the screw 600 in the direction of exiting the liquid injection hole 210, prevent the screw 600 from loosening and causing the electrolyte to leak from the liquid injection hole 210, and improve the safety of battery use.

[0036] As another implementation, the connection structure can also be a structure in which the abutment 700 is welded to the first end cap 200. After the screw 600 blocks the liquid injection hole 210, the abutment 700 is welded to the first end cap 200 to fix the screw 600. There is no limitation here.

[0037] As another implementation, the connection structure can also be a welding structure between the screw 600 and the first end cover 200. After the screw 600 blocks the injection hole 210, the screw 600 can be fixed by welding it onto the first end cover 200 using a welding device. No limitation is made here.

[0038] In some embodiments of this utility model, the abutment 700 is provided with a first external thread, and the annular protrusion 220 is provided with a first internal thread that matches the first external thread. The operation is simple, the connection is reliable, and it is convenient to assemble the abutment 700.

[0039] Specifically, when assembling the abutment 700, the abutment 700 is screwed on so that the first external thread and the first internal thread are engaged. When the abutment 700 abuts against the nut of the screw 600, the abutment 700 is installed in place, which can restrict the screw 600 from moving in the direction of exiting the injection hole 210. The operation is simple, the connection is reliable, and it is convenient to assemble the abutment 700.

[0040] As another implementation, the connection structure can also be a snap-fit ​​connection between the annular protrusion 220 and the abutment 700. For example, the annular protrusion 220 is provided with a slot, and the abutment 700 is provided with a hook. The hook part is accommodated in the slot and can abut against the side wall of the slot, and can also connect and fix the abutment 700. This will not be described in detail here.

[0041] In some embodiments of this utility model, the annular protrusion 220 and the first end cap 200 are an integral structure, which can reduce the number of molds, thereby reducing the production and manufacturing cost of the molds and thus reducing the production and manufacturing cost of the battery.

[0042] It should be noted that the annular protrusion 220 and the first end cap 200 can be integrally formed by stamping, which can reduce the number of molds, thereby reducing the production cost of the molds and thus reducing the production cost of the battery.

[0043] It should be noted that the annular protrusion 220 can also be fixedly connected to the first end cap 200 by welding. Welding methods include, but are not limited to, resistance welding, laser welding, or ultrasonic welding.

[0044] In some embodiments of this utility model, the abutment 700 includes a connecting portion 710 and an abutment portion 720 connected to the connecting portion 710. The connecting portion 710 is arranged around the outer periphery of the abutment portion 720. A first external thread is provided on the connecting portion 710. The abutment portion 720 abuts against the screw 600. On the one hand, it can isolate the screw 600 from contact with the outside air. On the other hand, it can facilitate the assembly of the abutment 700.

[0045] Specifically, the abutting part 720 and the connecting part 710 together define a clearance space. When assembling the abutting part, the nut of the bolt is placed in the clearance space, and the nut of the screw 600 abuts against the abutting part 720. On the one hand, this can isolate the screw 600 from contact with the outside air, and on the other hand, it can facilitate the assembly of the abutting part 700.

[0046] In some embodiments of this utility model, the abutment portion 720 and the connecting portion 710 are integral structures, which can reduce the number of molds, thereby reducing the production and manufacturing costs of the molds and thus reducing the production and manufacturing costs of the battery.

[0047] It should be noted that the abutting part 720 and the connecting part 710 can be integrally formed by stamping, which can reduce the number of molds, thereby reducing the production cost of the molds and thus reducing the production cost of the battery.

[0048] It should be noted that the annular protrusion 220 can also be fixedly connected to the first end cap 200 by welding. Welding methods include, but are not limited to, resistance welding, laser welding, or ultrasonic welding.

[0049] In some embodiments of this utility model, a safety valve 800 is also included. The second end cap 300 is provided with a through hole 520. The safety valve 800 is disposed on the second end cap 300 and covers the through hole 520, which can improve the safety of battery use.

[0050] Specifically, by setting up a safety valve 800, corrosive substances in the electrolyte can be prevented from contacting the electrodes, thereby protecting the internal structure of the battery from damage. Moreover, during the charging and discharging process of the battery, the safety valve 800 can release overpressured gas to prevent the internal temperature of the battery from becoming too high and avoid thermal runaway. When excessive gas pressure is generated inside the battery, the safety valve 800 will automatically open to depressurize, preventing the battery from cracking or deforming, thus improving the safety of battery use.

[0051] It should be noted that the specific structure of the safety valve 800 is a well-known technology and is not restricted here.

[0052] It should be noted that the safety valve 800 can be installed on the second end cap 300 by welding, and there is no restriction on this.

[0053] In some embodiments of this utility model, the first end cap 200 is provided with a connector for connecting the second end cap 300 to another battery, thereby enabling multiple batteries to be connected together and facilitating the series connection of multiple batteries.

[0054] In some embodiments of this utility model, the first end cap 200 is provided with a second internal thread 230, the second end cap 300 is provided with a third internal thread 310, the connector is provided with a second external thread that matches the second internal thread 230, and the connector is provided with a third external thread that matches the third internal thread 310. That is, two adjacent batteries are connected by a threaded structure, the number of batteries connected in series can be freely adjusted, and when only one battery is used, the connector can be removed from the battery without affecting the use.

[0055] In some embodiments of this utility model, the central shaft 500 is hollow to form a channel 510, the channel 510 is connected to the liquid injection hole 210, and the side wall of the channel 510 is provided with a plurality of through holes 520, which penetrate the central shaft 500, so as to facilitate the electrolyte to penetrate into the cell assembly 400, so as to facilitate the production and manufacturing of batteries.

[0056] Specifically, during electrolyte injection, the electrolyte flows into the channel 510 through the injection hole 210. Then, the electrolyte in the channel 510 flows into the cell assembly 400 through the through hole 520, which facilitates the electrolyte to penetrate into the cell assembly 400, so as to facilitate the production and manufacturing of batteries.

[0057] It should be noted that the heat generated during the charging and discharging of the battery cell assembly 400 can also be dissipated to the outside through the central shaft 500, which can improve the heat dissipation efficiency of the battery.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The present invention has been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the invention.

Claims

1. A battery, characterized in that, include: A cylindrical body (100) is provided with a first end cap (200) and a second end cap (300) at both ends of the cylindrical body (100). The cylindrical body (100), the first end cap (200) and the second end cap (300) define an accommodating space. A battery cell assembly (400) is provided in the accommodating space. The first end cap (200) is provided with a liquid injection hole (210). A central shaft (500) is inserted through the cell assembly (400). A screw (600) is inserted through the injection hole (210) and threadedly connected to the central shaft (500) to seal the injection hole (210). A connecting structure for securing the screw (600).

2. The battery according to claim 1, characterized in that, The connection structure includes an abutment (700) and an annular protrusion (220) disposed on the first end cap (200). Along the axial direction of the injection hole (210), the annular protrusion (220) is arranged around the outer periphery of the injection hole (210). The abutment (700) covers the screw (600) and is connected to the annular protrusion (220). The abutment (700) abuts against the screw (600).

3. The battery according to claim 2, characterized in that, The abutment (700) is provided with a first external thread, and the annular protrusion (220) is provided with a first internal thread that matches the first external thread.

4. The battery according to claim 2, characterized in that, The annular protrusion (220) and the first end cap (200) are an integral structure.

5. The battery according to claim 3, characterized in that, The abutment (700) includes a connecting portion (710) and an abutment portion (720) connected to the connecting portion (710). The connecting portion (710) is arranged around the outer periphery of the abutment portion (720). The first external thread is provided on the connecting portion (710). The abutment portion (720) abuts against the screw (600).

6. The battery according to claim 5, characterized in that, The abutting part (720) and the connecting part (710) are an integral structure.

7. The battery according to claim 1, characterized in that, It also includes a safety valve (800), and the second end cap (300) is provided with a through hole (520). The safety valve (800) is provided on the second end cap (300) and covers the through hole (520).

8. The battery according to claim 1, characterized in that, The first end cap (200) is provided with a connector for connecting the second end cap (300) of the other battery.

9. The battery according to claim 8, characterized in that, The first end cap (200) is provided with a second internal thread (230), the second end cap (300) is provided with a third internal thread (310), the connector is provided with a second external thread that matches the second internal thread (230), and the connector is provided with a third external thread that matches the third internal thread (310).

10. The battery according to claim 1, characterized in that, The central shaft (500) is hollow to form a channel (510), the channel (510) is connected to the injection hole (210), and the side wall of the channel (510) is provided with a plurality of through holes (520), the through holes (520) penetrating the central shaft (500).

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