A lightweight cell structure for lithium-ion batteries

Abstract

This utility model discloses a lightweight cell structure for lithium-ion batteries, including a lithium-ion battery, heat dissipation fins, an electrolyte chamber, a separator, a cathode core rod, and an anode core rod. The lithium-ion battery has multiple heat dissipation fins on its outer side and an electrolyte chamber inside. The lithium-ion battery has an upper cap and a lower cap at both ends, with the anode core rod and cathode core rod respectively located at their bottom ends, both embedded within the electrolyte chamber. The heat dissipation fins on the outer side of the lithium-ion battery improve heat dissipation and reduce the weight of the integral cell structure, increasing the battery's functionality and practicality. The upper and lower caps facilitate the installation of the cathode and anode core rods, and a screw head is provided at the end of the anode core rod.

Description

Technical Field

[0001] This utility model relates to the field of battery cell structure, specifically a lightweight battery cell structure for lithium-ion batteries. Background Technology

[0002] Lithium-ion batteries, commonly known as rocking chair batteries, are a general term for batteries that use lithium-ion intercalation compounds as positive electrode materials. They are a type of secondary battery (rechargeable battery) that mainly works by the movement of lithium ions between the positive and negative electrodes. A lithium-ion battery consists of a positive electrode, a negative electrode, an electrolyte and a separator, plus positive and negative leads, a battery case, safety devices, etc. [1]. During the charging and discharging process of a lithium-ion battery, Li+ ions are inserted and extracted back and forth between the two electrodes: during charging, Li+ ions are extracted from the positive electrode and inserted into the negative electrode through the electrolyte, and the negative electrode is in a lithium-rich state. The opposite is true during discharging.

[0003] For example, the authorized patent with publication number CN210074070U (High-Safety Lithium-ion Battery Cell Structure) includes a cell structure body, which includes a positive electrode sheet and a negative electrode sheet. The positive electrode sheet includes a positive current collector and a positive active material coating coated on the surface of the positive current collector. The negative electrode sheet includes a negative current collector and a negative active material coating coated on the surface of the negative current collector. The amount of active material coating on the outer layer of the positive and / or negative electrode sheets is lower than the amount of active material coating at the center of the cell structure body. This utility model provides a high-safety lithium-ion battery cell structure, which not only effectively avoids severe capacity decay of the cell but also improves the safety and reliability of lithium-ion batteries, thereby effectively reducing the occurrence of thermal runaway and combustion / explosion accidents in lithium-ion batteries and ensuring personnel safety.

[0004] The existing battery cell structure has insufficient heat dissipation capacity, adopts an integral structure, which makes the battery cell structure heavy, and the electrode rods of the lithium battery cannot be recycled and reused, making installation and disassembly inconvenient. In addition, the internal lithium-ion compound cannot be replaced, resulting in insufficient versatility. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight cell structure for lithium-ion batteries, in order to solve the problems mentioned in the background art, such as insufficient heat dissipation capacity of the cell structure itself, large mass of the cell structure due to the use of an integral structure, inability to recycle the electrode rods of the lithium battery, inconvenience of installation and disassembly, inability to replace the internal lithium-ion compound, and insufficient versatility.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a lightweight cell structure for lithium-ion batteries, comprising a lithium-ion battery, heat dissipation fins, an electrolyte chamber, a separator, a cathode core rod, and an anode core rod. The lithium-ion battery has multiple heat dissipation fins on its outer side and an electrolyte chamber inside. The lithium-ion battery has an upper cap and a lower cap at its two ends, and an anode core rod and a cathode core rod are respectively provided at the bottom of the upper cap and the lower cap, and both the anode core rod and the cathode core rod are embedded in the electrolyte chamber.

[0007] Preferably, the heat dissipation fins are designed with a lightweight structure, and the heat dissipation fins and the lithium-ion battery are designed as an integral structure.

[0008] Preferably, the anode core rod includes a lithium-ion compound filler cavity, a plug, a screw head, and a positive terminal;

[0009] The lithium-ion compound filler cavity is located in the middle of the inner cavity of the anode core rod. The screw head is located at the top of the anode core rod. The positive terminal is located at the top of the screw head. A positive terminal head is provided at the middle of the top of the positive terminal head. An exhaust hole is provided on one side of the top of the positive terminal head.

[0010] Preferably, the bottom end of the plug is provided with a sealing plug, which seals the inside of the lithium-ion compound filler cavity.

[0011] Preferably, the upper cap has an internal threaded hole at the middle of its end, and the screw head is threadedly fixed to the internal threaded hole.

[0012] Preferably, it also includes a diaphragm, which is disposed in the middle of the electrolyte chamber, and the cathode core rod and the anode core rod are symmetrically arranged through the diaphragm.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. The lithium-ion battery of this utility model is provided with heat dissipation fins on the outside. The heat dissipation fins can not only improve the heat dissipation capacity of the lithium-ion battery, but also reduce the weight of the integral cell structure, thereby increasing the functionality and practicality of the battery.

[0015] 2. The lithium-ion battery of this utility model is provided with an upper cap and a lower cap at both ends, which facilitates the installation of the cathode core rod and the anode core rod. A screw head is provided at the end of the anode core rod, which can be easily threaded and fixed to the upper cap. A lithium-ion compound filler cavity is provided inside the anode core rod, which can be filled and replaced with lithium-ion compound filler, so that the anode core rod can be recycled and reused, increasing its versatility. Attached Figure Description

[0016] Figure 1This is a schematic diagram of a lightweight cell structure for lithium-ion batteries according to the present invention.

[0017] Figure 2 This is a schematic diagram of the structure of the lithium-ion battery of this utility model;

[0018] Figure 3 This is a schematic diagram of the anode core rod of this utility model;

[0019] Figure 4 This is a front view of the positive terminal of this utility model;

[0020] Figure 5 This is a top view of the upper cap of this utility model;

[0021] Figure 6 This is a structural schematic diagram of part A of this utility model.

[0022] In the diagram: 1. Positive terminal; 2. Positive terminal connector; 3. Upper cap; 4. Lithium-ion battery; 5. Heat sink fins; 6. Lower cap; 7. Electrolyte chamber; 8. Separator; 9. Cathode core rod; 10. Screw head; 11. Plug; 12. Sealing plug; 13. Lithium-ion compound filler chamber; 14. Anode core rod; 15. Vent hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0024] Please see Figure 1-6 The present invention provides an embodiment of a lightweight cell structure for lithium-ion batteries, comprising a lithium-ion battery 4, heat dissipation fins 5, an electrolyte chamber 7, a separator 8, a cathode core rod 9, and an anode core rod 14. The lithium-ion battery 4 has multiple heat dissipation fins 5 on its outer side and an electrolyte chamber 7 inside. The lithium-ion battery 4 has an upper cap 3 and a lower cap 6 at its two ends, and the anode core rod 14 and the cathode core rod 9 are respectively located at the bottom of the upper cap 3 and the lower cap 6, and both the anode core rod 14 and the cathode core rod 9 are embedded in the electrolyte chamber 7.

[0025] The heat dissipation fins 5 can protect the outside of the lithium-ion battery 4, the electrolyte is stored in the electrolyte chamber 7, and the upper cap 3 and lower cap 6 are used to protect the two ends of the lithium-ion battery 4.

[0026] Furthermore, the heat dissipation fins 5 are designed to be lightweight, and the heat dissipation fins 5 and the lithium-ion battery 4 are designed as an integral structure. The heat dissipation fins 5 can not only improve the heat dissipation capacity of the lithium-ion battery 4, but also reduce the weight of the lithium-ion battery 4.

[0027] Furthermore, the anode core rod 14 includes a lithium-ion compound filler cavity 13, a plug 11, a screw head 10, and a positive terminal 1;

[0028] The lithium-ion compound filler cavity 13 is located in the middle of the inner cavity of the anode core rod 14. The screw head 10 is located at the top of the anode core rod 14. The positive terminal 1 is located at the top of the screw head 10. The positive terminal 2 is located at the middle of the top of the positive terminal 1. The top side of the positive terminal 2 is provided with an exhaust hole 15. The lithium-ion compound filler cavity 13 can be filled with lithium-ion compound filler, which can be replaced and recycled. The positive terminal 1 facilitates the connection of the battery.

[0029] Furthermore, the bottom end of the plug 11 is provided with a sealing plug 12, which seals the inside of the lithium-ion compound filling cavity 13. The lithium-ion compound filling cavity 13 can be blocked by the sealing plug 12.

[0030] Furthermore, the upper cap 3 has an internal threaded hole at the middle of its end, and the screw head 10 is threadedly fixed to the internal threaded hole, which facilitates threaded fixing to the screw head 10.

[0031] Furthermore, it also includes a diaphragm 8, which is located in the middle of the electrolyte chamber 7, and the cathode core rod 9 and the anode core rod 14 are symmetrically arranged through the diaphragm 8, which is used for ion exchange.

[0032] Working principle: During use, the heat dissipation fins 5 can improve the heat dissipation capacity of the lithium-ion battery 4. The upper cap 3 and the lower cap 6 seal both ends of the lithium-ion battery 4, and the lithium-ion compound is filled into the lithium-ion compound filling cavity 13. The screw head 10 controls the sealing plug 12 to seal the lithium-ion compound filling cavity 13 through the plug 11. The anode core rod 14 is inserted into the electrolyte cavity 7 and is fixed by thread locking the screw head 10 with the threaded hole in the middle of the upper cap 3. The positive terminal 1 and the positive terminal head 2 at its top are used to connect the battery to the power supply. The electrolyte is stored in the electrolyte cavity 7, and the ion exchange is controlled by the separator 8. During the charging and discharging process of the lithium-ion battery, Li+ ions are inserted and extracted back and forth between the cathode core rod 9 and the anode core rod 14. During charging, Li+ ions are extracted from the anode core rod 14 and inserted into the cathode core rod 9 through the electrolyte, and the negative electrode is in a lithium-rich state; the opposite is true during discharging.

[0033] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A lightweight cell structure for lithium-ion batteries, comprising a lithium-ion battery (4), heat dissipation fins (5), an electrolyte chamber (7), a separator (8), a cathode core rod (9), and an anode core rod (14), characterized in that: The lithium-ion battery (4) has multiple heat dissipation fins (5) on its outer side. The lithium-ion battery (4) has an electrolyte chamber (7) inside. The lithium-ion battery (4) has an upper cap (3) and a lower cap (6) at its two ends respectively. The bottom ends of the upper cap (3) and the lower cap (6) are respectively provided with an anode core rod (14) and a cathode core rod (9), and the anode core rod (14) and the cathode core rod (9) are both embedded in the electrolyte chamber (7).

2. The lightweight cell structure for lithium-ion batteries according to claim 1, characterized in that: The heat dissipation fins (5) are designed to be lightweight, and the heat dissipation fins (5) and the lithium-ion battery (4) are designed as an integral structure.

3. A lightweight cell structure for lithium-ion batteries according to claim 1, characterized in that: The anode core rod (14) includes a lithium-ion compound filler cavity (13), a plug (11), a screw head (10), and a positive terminal (1); The lithium-ion compound filler cavity (13) is located in the middle of the inner cavity of the anode core rod (14), the screw head (10) is located at the top of the anode core rod (14), the positive terminal (1) is located at the top of the screw head (10), the positive terminal head (2) is located at the middle of the top of the positive terminal head (1), and the positive terminal head (2) has an exhaust hole (15) on one side of the top.

4. A lightweight cell structure for lithium-ion batteries according to claim 3, characterized in that: The bottom end of the plug (11) is provided with a sealing plug (12), which is sealed inside the lithium-ion compound filler cavity (13).

5. A lightweight cell structure for lithium-ion batteries according to claim 1, characterized in that: The upper cap (3) has an internal threaded hole at the middle of its end, and the screw head (10) is threadedly fixed to the internal threaded hole.

6. A lightweight cell structure for lithium-ion batteries according to claim 1, characterized in that: It also includes a diaphragm (8), which is located in the middle of the electrolyte chamber (7), and the cathode core rod (9) and the anode core rod (14) are symmetrically arranged through the diaphragm (8).

Images