Efficient self-cooling battery
By designing hollow pole columns, current collector plates with give way holes and heat dissipation rods in lithium-ion batteries, multi-directional heat dissipation inside the battery is achieved, solving the problem of difficulty in heat dissipation during fast charging, extending battery life and improving safety performance.
Patent Information
- Application Number
- CN202421537252.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-02
AI Technical Summary
When existing lithium-ion batteries are quickly charged or discharged at high rates, it is difficult for heat to effectively dissipate heat, resulting in an increase in temperature and affecting battery life and safety performance.
An efficient self-heating battery is designed. By installing a hollow pole and a current collecting plate with a give way hole inside the shell, a heat dissipation rod is installed, and an electrode pole, a current collecting plate and a core are installed around the heat dissipation rod, so that heat can be diffused radially to the heat dissipation rod, and heat is quickly transmitted to the outside through the heat conduction channel of the heat dissipation rod.
It effectively reduces the temperature in the center of the battery, realizes multi-directional heat dissipation inside the battery, extends the service life of the battery, and improves the safety performance of the battery.
Smart Images
Figure CN222867802U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, in particular to a high-efficiency self-heating battery. Background Art
[0002] At present, in order to shorten the charging time and improve the user charging experience, the existing lithium-ion batteries generally have the ability to charge quickly. However, when the lithium-ion battery is charged quickly or discharged at a high rate, due to the large charging and discharging current, the heat generated by the battery will also increase, resulting in a relatively high temperature rise. If the heat is not discharged to the outside in time, it will seriously affect the life and safety performance of the battery. The existing structural form is difficult to meet the needs of rapid heat conduction and heat dissipation, and its structure needs to be optimized. In addition, the internal temperature of the battery center mainly relies on the residual electrolyte and voids inside the battery as the heat conduction medium, and its heat conduction capacity is poor, resulting in slow heat conduction and diffusion, which needs to be solved urgently. Utility Model Content
[0003] In view of the above-mentioned deficiencies in the prior art, the present application provides a high-efficiency self-heating battery.
[0004] The above invention objectives of the present application are achieved through the following technical solutions:
[0005] A shell, wherein poles are coaxially arranged at opposite ends of the shell, and current collecting plates are coaxially electrically connected to positions corresponding to the two poles inside the shell, the poles are hollow and connected to the inside of the shell, and the current collecting plates are provided with a clearance hole;
[0006] A heat dissipation rod, which is hollow and coaxially penetrates the interior of the housing through the pole and the clearance hole and communicates with the outside;
[0007] The winding core is arranged between the two current collecting plates, the winding core is arranged around the heat dissipation rod as the center, and the winding core abuts against the two current collecting plates at the same time and is electrically connected to the two current collecting plates.
[0008] By adopting the above technical scheme, the hollow pole and the current collecting plate with the clearance hole can allow the heat dissipation rod to be coaxially installed in the position inside the shell. During the battery charging and discharging process, the pole, current collecting plate and winding core arranged around the heat dissipation rod can evenly diffuse the heat to the heat dissipation rod in the radial direction. The heat dissipation rod serves as an independent heat conduction channel connected to the outside of the battery center. The external air continuously passes through the inside of the heat dissipation rod by convection, so that the heat on the heat dissipation rod can be quickly conducted to the outside along its axial direction, thereby effectively reducing the temperature of the battery center. In addition to dissipating heat outward through the shell, the battery can also dissipate heat outward from the center of the battery, thereby realizing multi-directional heat dissipation inside the battery, so as to solve the heat dissipation problem caused by fast charging now, and help to extend the service life of the battery.
[0009] In a preferred example, the present application may be further configured as follows: the current collecting plate is provided with a fixing groove along the winding direction of the winding core, and the winding core is located in the fixing groove.
[0010] By adopting the above technical solution and providing the fixing groove, the winding core can maintain a relatively fixed position on the current collecting plate, thereby preventing the winding core from loosening during the battery charging and discharging process and then contacting the heat dissipation rod to cause a short circuit.
[0011] In a preferred example, the present application can be further configured as follows: the high-efficiency self-heating battery also includes a fixed insulating sleeve, and the fixed insulating sleeve is located inside the outer shell and covers the inner wall of the outer shell.
[0012] By adopting the above technical solution and setting a fixed insulating sleeve, it is possible to prevent the internal components of the battery, such as the winding core, from contacting the outer shell and causing a short circuit.
[0013] In a preferred example, the present application can be further configured as follows: limiting flanges are radially extended at both ends of the fixed insulating sleeve, the two current collecting plates are located between the two limiting flanges, and the limiting flanges are used to abut against the current collecting plates.
[0014] By adopting the above technical solution, the limiting flange plays a role in limiting the current collecting plate, thereby preventing the current collecting plate from shaking during the battery charging and discharging process, and improving the stability of the internal structure of the battery.
[0015] In a preferred example, the present application may be further configured as follows: an insulating ring is coaxially arranged inside the pole, and the insulating ring is sleeved on the heat dissipation rod.
[0016] By adopting the above technical solution and providing an insulating ring, it is possible to avoid the heat dissipation rod directly contacting the pole and causing a short circuit.
[0017] In a preferred example, the present application can be further configured as follows: the shell is made of any one of steel, aluminum, and organic polymer.
[0018] In summary, the present application includes at least one of the following beneficial technical effects:
[0019] 1. The hollow pole and the current collecting plate with the clearance hole can be coaxially installed with the heat dissipation rod in the position inside the shell. During the battery charging and discharging process, the pole, current collecting plate and winding core arranged around the heat dissipation rod can evenly diffuse the heat to the heat dissipation rod in the radial direction. The heat dissipation rod serves as an independent heat conduction channel connecting the battery center to the outside. The external air continuously passes through the heat dissipation rod through convection, so that the heat on the heat dissipation rod can be quickly conducted to the outside along its axial direction, thereby effectively reducing the temperature of the battery center. In addition to dissipating heat outward through the shell, the battery will also dissipate heat outward from the center of the battery, realizing multi-directional heat dissipation inside the battery, so as to solve the heat dissipation problem caused by fast charging now, and help to extend the service life of the battery.
[0020] 2. By setting the fixing groove, the winding core can maintain a relatively fixed position on the current collecting plate, preventing the winding core from loosening during the battery charging and discharging process, thereby contacting the heat dissipation rod and causing a short circuit.
[0021] 3. The limiting flange serves to limit the current collecting plate, thereby preventing the current collecting plate from shaking during the battery charging and discharging process and improving the stability of the internal structure of the battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency self-heating battery in one embodiment of the present application;
[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of a high-efficiency self-heating battery in one embodiment of the present application.
[0024] Figure numerals: 1, shell; 2, heat dissipation rod; 3, winding core; 4, pole; 5, collecting plate; 6, clearance hole; 7, fixing groove; 8, fixed insulating sleeve; 9, limiting flange; 10, insulating ring. DETAILED DESCRIPTION
[0025] The following is a description of exemplary embodiments of the present application in conjunction with the accompanying drawings, including various details of the embodiments of the present application to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description.
[0026] It should be noted that the terms "first", "second", etc. in the present invention are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure.
[0027] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.
[0028] The following describes a high-efficiency self-heating battery of the present application with reference to the accompanying drawings.
[0029] like Figure 1 and Figure 2 As shown, the high-efficiency self-heating battery includes a shell 1, a heat dissipation rod 2 and a winding core 3, the opposite ends of the shell 1 are coaxially provided with poles 4, the positions of the two poles 4 in the shell 1 are coaxially electrically connected with current collecting plates 5, the poles 4 are hollow and connected to the inside of the shell 1, the current collecting plates 5 are provided with a clearance hole 6, the heat dissipation rod 2 is hollow, the heat dissipation rod 2 is coaxially penetrated through the inside of the shell 1 through the poles 4 and the clearance hole 6 and connected to the outside, the winding core 3 is arranged between the two current collecting plates 5, the winding core 3 is arranged around the heat dissipation rod 2 as the center, the winding core 3 is simultaneously abutted against the two current collecting plates 5 and is electrically connected to the two current collecting plates 5, so as to realize the power conduction between the poles, the current collecting plates and the winding core, wherein the hollow poles 4 and the poles with the clearance hole 6 are provided with a clearance hole 6. The current collecting plate 5 with the position hole 6 can coaxially install the heat dissipation rod 2 at the position inside the shell 1. During the battery charging and discharging process, the pole 4, current collecting plate 5 and winding core 3 arranged around the heat dissipation rod 2 can evenly diffuse the heat to the heat dissipation rod 2 in the radial direction. The heat dissipation rod 2 serves as an independent heat conduction channel connected to the outside of the battery center. The external air continuously passes through the heat dissipation rod 2 through convection, so that the heat on the heat dissipation rod 2 can be quickly conducted to the outside along its axial direction, thereby effectively reducing the temperature of the battery center. In addition to dissipating heat outward through the shell 1, the battery can also dissipate heat outward from the center of the battery, thereby realizing multi-directional heat dissipation inside the battery, so as to solve the heat dissipation problem caused by rapid charging now, and help to extend the service life of the battery.
[0030] It should be noted that the convection process inside the heat dissipation rod 2 can refer to the chimney principle. During the operation of the battery, the heat in the middle of the battery diffuses to the heat dissipation rod 2. At this time, the temperature inside the heat dissipation rod 2 is high, and the gas inside the heat dissipation rod 2 expands due to the heat, and the thermal motion is enhanced, so that the density of the internal gas is reduced, thereby forming an upward airflow. The middle part of the battery will absorb the external cold air from bottom to top and discharge the hot air to achieve the function of heat dissipation.
[0031] Specifically, in the present embodiment, the outer shell 1, the pole 4, the current collecting plate 5 and the heat dissipation rod 2 are all cylindrical in shape to adapt to the shape of most cylindrical batteries on the market. The outer shell 1 is made of any one of steel, aluminum and organic polymer. Among them, the outer shell 1 made of steel has good thermal conductivity and is suitable for the working condition of heat dissipation from the inside of the battery to the outside. In addition, the steel material is hard and corrosion-resistant, which can effectively avoid the contact between the inside of the battery and the external environment, thereby ensuring the stability of the battery. The pole 4 and the current collecting plate 5 are both made of conductive materials such as metal materials, which can effectively transfer current and dissipate heat. The heat dissipation rod 2 should be made of materials with good thermal conductivity, such as materials with high thermal conductivity such as copper, aluminum or graphite. Among them, because graphite has good thermal conductivity and insulation effect, graphite can be preferably used as the manufacturing material of the heat dissipation rod 2, which is suitable for the heat dissipation working condition inside the battery.
[0032] Furthermore, the current collecting plate 5 is provided with a fixing groove 7 along the winding direction of the core 3, and the core 3 is located in the fixing groove 7. By providing the fixing groove 7, the core 3 can maintain a relatively fixed position on the current collecting plate 5, thereby preventing the core 3 from loosening during the battery charging and discharging process, thereby contacting the heat dissipation rod 2 and causing a short circuit.
[0033] In addition, the high-efficiency self-heating battery also includes a fixed insulating sleeve 8, which is located inside the outer shell 1 and covers the inner wall of the outer shell 1. By setting the fixed insulating sleeve 8, the internal components of the battery such as the core 3 can be prevented from contacting the outer shell 1 and causing a short circuit.
[0034] Furthermore, limiting flanges 9 are radially extended at both ends of the fixed insulating sleeve 8, and the two current collecting plates 5 are located between the two limiting flanges 9. The limiting flanges 9 are used to abut the current collecting plates 5, wherein the limiting flanges 9 play a role in limiting the current collecting plates 5, thereby preventing the current collecting plates 5 from shaking during the battery charging and discharging process, thereby improving the stability of the internal structure of the battery.
[0035] In addition, an insulating ring 10 is coaxially arranged inside the pole 4, and the insulating ring 10 is sleeved on the heat dissipation rod 2. By setting the insulating ring 10, the heat dissipation rod 2 can be prevented from directly contacting the pole 4 and causing a short circuit. Specifically, in the present embodiment, the insulating ring 10 is preferably made of rubber material. The insulating ring 10 made of rubber material not only has an insulating effect, but also has excellent elastic deformation performance. When it is installed, it cooperates with the hollow setting inside the pole 4 to play a role of abutting and fixing the heat dissipation rod 2, thereby reducing the loosening of the heat dissipation rod 2.
[0036] The above specific implementations do not constitute a limitation on the protection scope of this application. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included in the protection scope of this application.
Claims
1. A high-efficiency self-heating battery, characterized in that: include: A shell (1), wherein poles (4) are coaxially arranged at opposite ends of the shell (1), and current collecting plates (5) are coaxially electrically connected to positions corresponding to the two poles (4) inside the shell (1), the poles (4) are hollow and connected to the inside of the shell (1), and the current collecting plates (5) are provided with clearance holes (6); A heat dissipation rod (2), the heat dissipation rod (2) being hollow, the heat dissipation rod (2) being coaxially penetrated through the pole (4) and the clearance hole (6) inside the housing (1) and being connected to the outside; A winding core (3), wherein the winding core (3) is arranged between the two current collecting plates (5), the winding core (3) is arranged around the heat dissipation rod (2) as the center, and the winding core (3) simultaneously abuts against the two current collecting plates (5) and is electrically connected to the two current collecting plates (5).
2. A high-efficiency self-heating battery as claimed in claim 1, characterized in that: The current collecting plate (5) is provided with a fixing groove (7) along the winding direction of the winding core (3), and the winding core (3) is located in the fixing groove (7).
3. A high-efficiency self-heating battery as claimed in claim 1, characterized in that: It also comprises a fixed insulating sleeve (8), wherein the fixed insulating sleeve (8) is located inside the outer shell (1) and covers the inner side wall of the outer shell (1).
4. A high-efficiency self-heating battery as claimed in claim 3, characterized in that: Both ends of the fixed insulating sleeve (8) are provided with limit flanges (9) extending radially, the two current collecting plates (5) are located between the two limit flanges (9), and the limit flanges (9) are used to abut against the current collecting plates (5).
5. A high-efficiency self-heating battery as claimed in claim 1, characterized in that: An insulating ring (10) is coaxially arranged inside the pole (4), and the insulating ring (10) is sleeved on the heat dissipation rod (2).
6. A high-efficiency self-heating battery as claimed in claim 1, characterized in that: The housing (1) is made of any one of steel, aluminum, and organic polymer.