Small square aluminum shell capacitive lithium battery

Abstract

The utility model discloses a small square aluminum shell capacitive lithium battery which comprises a shell, a roll core and a rubber plug, the rubber plug is used for sealing the roll core in the shell, a pressure release valve is arranged at the bottom of the shell, a pin is arranged on the roll core, the pin penetrates through the rubber plug and protrudes out of the end face of the rubber plug, and the pressure release valve is arranged at the bottom of the shell of the lithium battery, so that the battery core is convenient to assemble. The lithium battery is high in mechanical strength and good in safety performance, meanwhile, the pins are used for replacing traditional nickel tab welding, cost can be effectively reduced, wires and welding steps in the assembling process can be reduced, the internal structure can be optimized, the production cost can be reduced, and meanwhile the lithium battery has the advantages of being high in power density, low in temperature and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium batteries, and particularly relates to a small square aluminum shell capacitor type lithium battery. Background Art

[0002] In the prior art, some lithium batteries adopt a cylindrical soft pack process and use an aluminum-plastic film for external packaging of the battery. The aluminum-plastic film itself has low strength. Once the battery is short-circuited, it can develop into overall thermal decomposition, thereby reacting with the electrolyte to increase the internal pressure and temperature of the battery cell, leading to fire and combustion, which poses a great safety hazard. More importantly, most lithium batteries have thin metal sheets at the positive and negative electrodes that are connected to the electrode pieces and the battery casing by welding. The internal resistance is high, and it is difficult to ensure the consistency of the battery cell quality. In addition, manual soldering of leads is required in the later stage, which increases labor and material costs. At the same time, the lithium battery in the prior art has a high energy density, but a low power density and a short life. Although supercapacitors have the advantages of high power density and long life, their energy density is relatively small. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a small square aluminum shell capacitor lithium battery, which can use pins to replace traditional nickel.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows: a small square aluminum shell capacitor lithium battery, characterized in that it includes an outer shell, a winding core and a rubber plug, the rubber plug is used to seal the winding core in the outer shell, a pressure relief valve is provided at the bottom of the outer shell, and a pin is provided on the winding core, and the pin passes through the rubber plug and protrudes from the end face of the rubber plug.

[0005] Compared with the prior art, the beneficial effects of the utility model are: a pressure relief valve is provided at the bottom of the lithium battery shell, which is convenient for the assembly of the battery cell, so that the lithium battery has high mechanical strength and good safety performance. At the same time, the use of pins instead of traditional nickel pole ear welding can not only effectively reduce costs, but also reduce wires and welding steps in the assembly process, optimize the internal structure, and reduce production costs. At the same time, it has the beneficial effects of high power density, low temperature characteristics, etc.

[0006] In the above-mentioned capacitive lithium battery, the winding core includes positive and negative electrode sheets, a diaphragm and a guide needle, the diaphragm is located between the positive and negative electrode sheets, the diaphragm is wound and connected to the positive and negative electrode sheets, and the guide needle is connected to the positive and negative electrode sheets.

[0007] In the above-mentioned capacitive lithium battery, the rubber plug is provided with a lead-out hole, and the pin passes through the lead-out hole.

[0008] In the above-mentioned capacitive lithium battery, the pressure relief valve is made of a cross-shaped structure.

[0009] The above-mentioned capacitive lithium battery, the shell is a square structure.

[0010] The above-mentioned capacitive lithium battery also includes an electrolyte, and the electrolyte is injected into the winding core.

[0011] The above-mentioned capacitive lithium battery has a marking portion on the shell, and the marking portion is used to indicate the rated value of the lithium battery.

[0012] In the above-mentioned capacitive lithium battery, the edge of the shell adopts an arc design.

[0013] In the above-mentioned capacitive lithium battery, the pins are made of aluminum material.

[0014] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of a capacitive lithium battery according to an embodiment of the present utility model Figure 1 ;

[0016] Figure 2 An exploded diagram of a capacitive lithium battery according to an embodiment of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of a pressure relief valve according to an embodiment of the utility model;

[0018] Description of the accompanying drawings: 100 housing, 110 pressure relief valve, 120 identification portion, 200 winding core, 300 rubber plug, 210 pin, 310 lead-out hole. DETAILED DESCRIPTION

[0019] The embodiments of the present invention are described in detail below. Figures 1 to 3 The embodiment of the utility model provides a small square aluminum shell capacitor lithium battery, including a shell 100, a winding core 200 and a plug 300, the plug 300 is used to seal the winding core 200 in the shell 100, a pressure relief valve 110 is provided at the bottom of the shell 100, and a pin 210 is provided on the winding core 200, and the pin 210 passes through the plug 300 and protrudes from the end surface of the plug 300. The bottom of the shell 100 of the lithium battery is provided with a pressure relief valve 110, which is convenient for the assembly of the battery cell, so that the lithium battery has high mechanical strength and good safety performance. At the same time, the use of the pin 210 instead of the traditional nickel pole ear welding can not only effectively reduce the cost, but also reduce the wire and welding steps in the assembly process, optimize the internal structure, reduce the production cost, and at the same time have the beneficial effects of high power density and low temperature characteristics.

[0020] Furthermore, the winding core 200 includes positive and negative electrode sheets, a diaphragm, and a guide needle. The diaphragm is located between the positive and negative electrode sheets, the diaphragm is wound and connected to the positive and negative electrode sheets, and the guide needle is connected to the positive and negative electrode sheets. Of course, the utility model does not limit the specific material of the positive and negative electrode sheets. Preferably, the positive electrode of the small square capacitive lithium battery provided by the utility model is made of lithium manganese oxide or lithium ferrous phosphate, and the negative electrode sheet is made of lithium titanate. The diaphragm is sandwiched between the positive and negative electrode sheets to separate the positive and negative electrode sheets. The guide needle is riveted to the positive and negative electrode sheets and then wound with the diaphragm to form the winding core 200. The winding core 200 is placed into the aluminum shell by pressing the core. Further, referring to Figure 1 A pin 210 is provided on the winding core 200. Of course, the utility model does not limit the specific material of the pin 210. The pin 210 is used to connect the lithium battery to the electrical equipment. The electrolyte is injected into the winding core 200, and then the aluminum shell is sealed with a rubber plug 300. The rubber plug 300 is provided with a lead-out hole 310 for leading out the pin 210.

[0021] Furthermore, the capacitive lithium battery proposed in the present invention adopts a chemical experimental technology method of chemical composition, injects electrolyte into the winding core 200 to form a capacitive lithium battery, and sleeves a heat shrink tube on the pin 210 to insulate and protect the capacitive lithium battery. Further, the shell 100 of a small square capacitive lithium battery proposed in the present invention is a square structure. Of course, referring to Figure 2 The square housing 100 can be integrally formed. Preferably, the housing 100 is made of aluminum material, and the edge of the housing 100 is designed with an arc to prevent the capacitive lithium battery from being damaged due to the impact of foreign objects or falling from a high place during daily use, thereby ensuring the service life and quality of the capacitive lithium battery body and improving the volume energy density. Figure 1 The outer shell 100 is provided with a marking portion 120, and the marking portion 120 is used to indicate the rated value of the lithium battery.

[0022] Further, refer to Figure 3 The bottom of the housing 100 is provided with a pressure relief valve 110. Of course, the utility model does not limit the specific structure of the pressure relief valve 110. Preferably, the pressure relief valve 110 adopts a cross-shaped structure. The pressure relief valve 110 is used to release the pressure inside the lithium battery. When an abnormal situation occurs inside the capacitive lithium battery, such as overload, overcharge, over-discharge and overtemperature, a large amount of gas is generated inside the battery, causing the internal pressure to rise. The lithium battery pressure relief valve 110 will be activated, and its pressure release sheet will automatically expand or bounce up to release the excess gas and heat, keep the internal pressure of the lithium battery pack stable within a reasonable range, and prevent the occurrence of dangerous accidents such as battery short circuit and explosion.

[0023] It should be noted that in the description of the present invention, if there are any orientation descriptions, such as up, down, front, back, left, right, etc., the orientations or positional relationships indicated are all based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A small square aluminum shell capacitor lithium battery, characterized in that: The invention comprises a shell (100), a winding core (200) and a rubber plug (300), wherein the rubber plug (300) is used to seal the winding core (200) in the shell (100), a pressure relief valve (110) is provided at the bottom of the shell (100), and a pin (210) is provided on the winding core (200), wherein the pin (210) passes through the rubber plug (300) and protrudes from the end surface of the rubber plug (300).

2. The capacitive lithium battery according to claim 1, characterized in that: The winding core (200) comprises positive and negative electrode sheets, a separator and a guide needle, wherein the separator is located between the positive and negative electrode sheets, the separator is wound and connected to the positive and negative electrode sheets, and the guide needle is connected to the positive and negative electrode sheets.

3. The capacitive lithium battery according to claim 1, characterized in that: The rubber plug (300) is provided with a lead-out hole (310), and the pin (210) passes through the lead-out hole (310).

4. The capacitive lithium battery according to claim 1, characterized in that: The pressure relief valve (110) is made of a cross-shaped structure.

5. The capacitive lithium battery according to claim 1, characterized in that: The housing (100) is a square structure.

6. The capacitive lithium battery according to claim 1, characterized in that: It also includes an electrolyte, which is injected into the winding core (200).

7. The capacitive lithium battery according to claim 1, characterized in that: The housing (100) is provided with a marking portion (120), and the marking portion (120) is used to indicate the rated value of the lithium battery.

8. The capacitive lithium battery according to claim 1, characterized in that: The edge of the housing (100) is designed with an arc.

9. The capacitive lithium battery according to claim 1, characterized in that: The pin (210) is made of aluminum material.

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