Lithium ion battery with bottom support
By introducing bottom bracket, flow guide groove, thermal conduction plate and liquid replenishment components into the lithium-ion battery, the problem of insufficient circulation space of the electrolyte is solved, the wetting effect and heat dissipation ability are improved, convenient liquid replenishment is achieved, and the battery service life is extended.
Patent Information
- Application Number
- CN202421957954.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The circulation space of the electrolyte in existing lithium batteries is limited, the wetting effect is poor, and the electrolyte cannot be replenished, resulting in a short service life.
A lithium-ion battery with a bottom bracket is designed, including a bottom bracket, a flow guide groove, a heat conduction plate, an insulating sleeve and a liquid replenishing assembly. The electrolyte is wetted by the flow guide groove, the groove enhances the liquid replenishing effect, the heat conduction plate enhances the heat dissipation ability, the insulation sleeve prevents electricity leakage, and the liquid replenishing assembly facilitates electrolyte replenishment.
It improves the circulation space and wetting effect of the electrolyte, extends the service life of lithium-ion batteries, enhances heat dissipation capabilities, prevents short circuits and leakage, and achieves convenient electrolyte replenishment.
Smart Images
Figure CN223093086U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, and more specifically, to a lithium-ion battery with a bottom tray. Background Technique
[0002] A lithium battery is a type of battery with lithium metal or lithium alloy as the positive / negative electrode material and using a non-aqueous electrolyte solution. The chemical properties of lithium metal are very active. With the development of science and technology, lithium batteries have become the mainstream. As an important part of lithium batteries, the bottom tray is mainly used for insulation and protection between the internal electrode group of the through-hole and the through-hole housing, and to protect the safety inside the through-hole.
[0003] The patent document with the publication number of CN21292077787U in the prior art provides a power battery bottom tray and its power battery. The device wraps an insulating sheet around the through-hole, places the through-hole inside the outer shell, opens a through-hole on the insulating sheet at the bottom of the through-hole, sets the bottom tray at the bottom of the through-hole, the bottom tray is located between the insulating sheet at the bottom of the through-hole and the inner side of the bottom of the outer shell, the bottom tray is an insulating and porous structure, and a diversion groove is arranged on the bottom tray, and the position of the diversion groove corresponds to the position of the through-hole of the upper insulating sheet.
[0004] Although the device has many beneficial effects, there are still the following problems: during the use of the device, the bottom of the through-hole and the bottom tray are in a squeezing state, the space available for the electrolyte to flow through at the bottom of the through-hole is limited, and the wetting effect is poor; secondly, the device cannot replenish the electrolyte during use, and the service life is short, so it needs to be improved. In view of this, we propose a lithium-ion battery with a bottom tray. Content of the Utility Model
[0005] 1. Technical Problems to be Solved
[0006] The purpose of the utility model is to provide a lithium-ion battery with a bottom tray to solve the problems of limited space for the electrolyte to flow through, poor wetting effect, and inability to replenish the electrolyte proposed in the above background technique.
[0007] 2. Technical Solution
[0008] A lithium-ion battery with a bottom tray includes an outer shell. A bottom tray assembly is provided at the bottom of the inner cavity of the outer shell. The bottom tray assembly includes a bottom tray. A plurality of diversion grooves are opened at the top of the bottom tray. A groove is opened at the bottom of the bottom tray. A cavity is opened inside the bottom tray. A heat conducting plate is provided inside the cavity. Welding strips are provided on both sides of the bottom tray. A plurality of raised blocks are provided on the top of the welding strips. An insulating sleeve is provided on the top of the bottom tray assembly. A plurality of through-holes are opened at the bottom of the inner cavity of the insulating sleeve. An electric core is provided inside the insulating sleeve. A liquid replenishing assembly is provided on the side wall of the outer shell.
[0009] Preferably, the liquid replenishing component includes a liquid replenishing port, which is threadedly connected with a cover body. A sealing plate is provided on the inner wall of the cavity of the cover body, and a turning handle is provided on the outer circumferential wall of the cover body.
[0010] Preferably, the cross-section of the diversion groove is a trapezoid with the bottom side length greater than the top side length. The size and position of the diversion groove match the size and position of the through hole, and the inner diameter of the top of the through hole is greater than the inner diameter of the bottom of the through hole.
[0011] Preferably, the diversion groove is arranged longitudinally, and both the starting end and the ending end of the diversion groove are located on the side wall of the bottom support plate.
[0012] Preferably, the material of the bottom support plate is polyethylene, and the material of the heat conducting plate is asbestos fiber.
[0013] Preferably, a sealing ring is provided on the top of the outer shell, and the materials of the sealing ring and the sealing plate are both vulcanized rubber.
[0014] 3. Beneficial Effects
[0015] Compared with the prior art, the advantages of the present utility model are as follows:
[0016] The present utility model prevents short circuit caused by the contact between the through hole and the outer shell through the bottom support plate, improves the infiltration efficiency of the electrolyte into the through hole through the diversion groove, improves the liquid replenishing effect during the circulation process through the groove, improves the heat dissipation capacity through the heat conducting plate, prevents the reduction of the lithium-ion battery capacity caused by overheating, concentrates the ultrasonic energy through the raised block to improve the ultrasonic welding effect, prevents the lithium-ion battery from leaking electricity through the insulating sleeve, and the electrolyte flows into the through hole through the diversion groove and contacts and infiltrates the battery core;
[0017] Secondly, the turning handle facilitates the staff to manually screw the cover body, the sealing plate prevents the electrolyte from leaking out of the liquid replenishing port, and the liquid replenishing port facilitates the replenishment of the electrolyte, thus prolonging the service life of the lithium-ion battery; the structure design of the present utility model is compact and reasonable, the flow space for the electrolyte is sufficient, the infiltration effect is good, and it is convenient to replenish the electrolyte to prolong the service life. Description of the Drawings
[0018] Figure 1 is the overall structure schematic diagram of the present utility model;
[0019] Figure 2 is the partial structure sectional view of the bottom support assembly of the present utility model;
[0020] Figure 3 is Figure 2 the enlarged schematic diagram at A in
[0021] Figure 4 is the partial structure schematic diagram of the insulating sleeve of the present utility model;
[0022] Figure 5Partial structural schematic diagram of the liquid replenishment component of the present utility model;
[0023] Explanation of reference numerals in the figure: 1. Outer shell; 2. Bottom support component; 3. Insulating sleeve; 4. Through hole; 5. Electric core; 6. Liquid replenishment component; 7. Sealing ring; 201. Bottom support plate; 202. Flow guiding groove; 203. Groove; 204. Cavity; 205. Heat conducting plate; 206. Welding strip; 207. Protruding block; 601. Liquid replenishment port; 602. Cover body; 603. Sealing plate; 604. Rotating handle. Specific embodiments
[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.
[0025] In the description of the present utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.
[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, terms such as "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.
[0027] Please refer to Figures 1-5 , the present utility model provides a technical solution:
[0028] A lithium-ion battery with a bottom support includes a housing 1. At the bottom of the inner cavity of the housing 1, a bottom support assembly 2 is fixedly provided. The bottom support assembly 2 includes a bottom support plate 201. A plurality of diversion grooves 202 are formed at the top of the bottom support plate 201. A groove 203 is formed at the bottom of the bottom support plate 201. A cavity 204 is formed inside the bottom support plate 201. A heat conducting plate 205 is fixedly provided inside the cavity 204. Welding strips 206 are fixedly provided on both sides of the bottom support plate 201. A plurality of raised blocks 207 are fixedly provided at the top of the welding strips 206. An insulating sleeve 3 is welded on the top of the bottom support assembly 2. A plurality of through holes 4 are formed at the bottom of the inner cavity of the insulating sleeve 3. A battery cell 5 is fixedly provided inside the insulating sleeve 3. A liquid supplementing assembly 6 is fixedly provided on the side wall of the housing 1. In the present utility model, the bottom support plate 201 prevents the through holes 4 from contacting the housing 1 and causing a short circuit. The diversion grooves 202 improve the infiltration efficiency of the electrolyte into the through holes 4. The groove 203 improves the liquid supplementing effect during the circulation process. The heat conducting plate 205 improves the heat dissipation ability and prevents the capacity of the lithium-ion battery from decreasing due to excessive temperature. The raised blocks 207 concentrate the ultrasonic energy and improve the ultrasonic welding effect. The insulating sleeve 3 prevents the lithium-ion battery from leaking electricity. The electrolyte in the diversion grooves 202 enters the through holes 4 and contacts and infiltrates the battery cell 5.
[0029] Specifically, the liquid supplementing assembly 6 includes a liquid supplementing port 601. A cover body 602 is threadedly connected to the liquid supplementing port 601. A sealing plate 603 is fixedly provided on the side wall of the inner cavity of the cover body 602. A turning handle 604 is fixedly provided on the circumferential outer wall of the cover body 602. The turning handle 604 facilitates the staff to manually screw the cover body 602. The sealing plate 603 prevents the electrolyte from leaking out of the liquid supplementing port 601. The liquid supplementing port 601 facilitates the supplement of the electrolyte and prolongs the service life of the lithium-ion battery.
[0030] Furthermore, the cross-section of the diversion groove 202 is a trapezoid with the bottom side length greater than the top side length. The size and position of the diversion groove 202 match the size and position of the through holes 4. The inner diameter of the top of the through holes 4 is greater than the inner diameter of the bottom of the through holes 4. By setting the cross-section of the diversion groove 202 as a trapezoid, more electrolyte can pass through the inside of the diversion groove 202, effectively improving the infiltration and formation rate of the electrolyte and the through holes 4.
[0031] It should be noted that the diversion grooves 202 are longitudinally arranged, and both the starting end and the ending end of the diversion grooves 202 are located on the side wall of the bottom support plate 201. Through the diversion grooves 202 with both the starting end and the ending end located on the side wall of the bottom support plate 201, the electrolyte can enter the diversion grooves 202 from the side wall of the bottom support plate 201, preventing the available electrolyte flow space from being limited due to extrusion and affecting the infiltration effect.
[0032] It should be noted that the material of the bottom support plate 201 is polyethylene, and the material of the heat conducting plate 205 is asbestos fiber. The heat conducting plate 205 made of asbestos fiber improves the heat insulation and electrical insulation properties, preventing the capacity of the lithium-ion battery from being affected by excessive temperature.
[0033] In addition, a sealing ring 7 is fixedly installed on the top of the outer shell 1. The sealing ring 7 and the sealing plate 603 are both made of vulcanized rubber. The sealing ring 7 and the sealing plate 603 made of vulcanized rubber improve the sealing performance of the lithium-ion battery with a bottom tray, preventing the electrolyte from flowing out.
[0034] Working principle: When the installation of a lithium-ion battery with a bottom tray is required by this device, the staff places the outer shell 1 at the required position, fills the interior with electrolyte, uses ultrasonic welding to weld the cover body 602 and the welding strip 206, places the battery cell 5 inside the insulating sleeve 3, places the battery cell 5 together with the bottom tray assembly 2 and the insulating sleeve 3 inside the outer shell 1. The bottom tray plate 201 prevents the through hole 4 from contacting the outer shell 1 and causing a short circuit. The diversion groove 202 improves the infiltration efficiency of the electrolyte into the through hole 4. The groove 203 improves the liquid supplement effect during the circulation process. The heat conducting plate 205 made of asbestos fiber improves the heat insulation and electrical insulation properties, preventing the high temperature from affecting the capacity of the lithium-ion battery. The raised block 207 concentrates the ultrasonic energy, improving the effect of ultrasonic welding. The insulating sleeve 3 prevents the lithium-ion battery from leaking electricity. The electrolyte diversion groove 202 enters the through hole 4 and contacts and infiltrates the battery cell 5. The turning handle 604 facilitates the staff to manually turn the cover body 602. The sealing plate 603 prevents the electrolyte from leaking out from the liquid supplement port 601. The liquid supplement port 601 facilitates the replenishment of the electrolyte, extending the service life of the lithium-ion battery. The sealing ring 7 and the sealing plate 603 made of vulcanized rubber improve the sealing performance of the lithium-ion battery with a bottom tray, preventing the electrolyte from flowing out.
[0035] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and do not limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A lithium-ion battery with a base, comprising a housing (1), characterized in that: At the bottom of the inner cavity of the outer shell (1), there is a bottom support assembly (2). The bottom support assembly (2) includes a bottom support plate (201). A plurality of flow guiding grooves (202) are formed at the top of the bottom support plate (201). A groove (203) is formed at the bottom of the bottom support plate (201). A cavity (204) is formed inside the bottom support plate (201). A heat conducting plate (205) is arranged inside the cavity (204). Welding strips (206) are arranged on both sides of the bottom support plate (201). A plurality of raised blocks (207) are arranged at the top of the welding strips (206). An insulating sleeve (3) is arranged at the top of the bottom support assembly (2). A plurality of through holes (4) are formed at the bottom of the inner cavity of the insulating sleeve (3). An electric core (5) is arranged inside the insulating sleeve (3). A liquid supplementing assembly (6) is arranged on the side wall of the outer shell (1).
2. The lithium-ion battery with a base according to claim 1, wherein: The liquid supplementing assembly (6) includes a liquid supplementing port (601). A cover body (602) is threadedly connected to the liquid supplementing port (601). A sealing plate (603) is arranged on the side wall of the inner cavity of the cover body (602). A turning handle (604) is arranged on the circumferential outer wall of the cover body (602).
3. The lithium-ion battery with a base according to claim 2, characterized in that: The cross-section of the flow guiding groove (202) is a trapezoid with the bottom side length greater than the top side length. The size and position of the flow guiding groove (202) match the size and position of the through hole (4). The inner diameter of the top of the through hole (4) is greater than the inner diameter of the bottom of the through hole (4).
4. The lithium ion battery with a base according to claim 3, wherein: The flow guiding groove (202) is longitudinally arranged. The starting end and the ending end of the flow guiding groove (202) are both located on the side wall of the bottom support plate (201).
5. The lithium-ion battery with a bottom support according to claim 4, characterized in that: The material of the bottom support plate (201) is polyethylene, and the material of the heat conducting plate (205) is asbestos fiber.
6. The lithium-ion battery with a bottom support according to claim 5, characterized in that: A sealing ring (7) is arranged at the top of the outer shell (1). The materials of the sealing ring (7) and the sealing plate (603) are both vulcanized rubber.