Battery pole piece and battery
By designing a snake-shaped hollow groove heating piece in a lithium-ion battery, a self-heating closed circuit is formed, which solves the problems of charging and discharging of lithium-ion batteries and energy waste at low temperatures, and improves the battery performance and life in low temperature environments.
Patent Information
- Application Number
- CN202323544780.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-26
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2033-12-26
AI Technical Summary
Existing lithium-ion batteries have difficulty charging and discharging in low-temperature environments, with large capacity attenuation, large internal resistance, and reduced cycle life. The external heating method cannot directly act on the battery cell electrode, resulting in waste of energy.
A heating sheet is designed with a serpentine arrangement of hollow grooves, which is sandwiched between the positive and negative electrode sheets, forming a current path, accurately controlling the heating part, directly transmitting heat to the electrode sheet, forming a self-heating closing circuit.
It improves the energy utilization rate and battery life of lithium-ion batteries in low-temperature environments, keeps the battery working normally at low temperatures, and avoids energy waste.
Smart Images
Figure CN223218348U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of lithium-ion batteries, in particular to a battery pole piece and a battery. Background Art
[0002] As the energy source of energy storage systems, the charging and discharging performance of lithium-ion batteries is directly related to the charging speed, battery life, power, etc. of the energy storage system; the quality of its performance will directly affect the service life and safety of the energy storage system.
[0003] The performance of lithium-ion batteries is greatly affected by the ambient temperature. At low temperatures, charging and discharging of lithium-ion batteries becomes difficult, the capacity decays significantly, the internal resistance increases, the peak power decreases, and the cycle life is shortened.
[0004] Currently, square-shell power batteries are mainly heated externally in cold weather to keep them at their normal operating temperature. This heating method cannot directly act on the battery cell electrodes and also seriously wastes energy.
[0005] To this end, we propose a battery electrode and a battery to solve the problem of energy waste. Utility Model Content
[0006] The purpose of this utility model is to solve the shortcomings of the prior art. In order to achieve the above purpose, this utility model adopts the following technical solutions:
[0007] A battery electrode comprises a heating plate, wherein the heating plate is provided with a hollow groove, the heating plate is symmetrically arranged and arranged in a serpentine shape, and the width of the heating plate is equal to the width of the hollow groove; the hollow groove is provided on the surface of the heating plate, so that the heating plate is arranged in a serpentine shape, and the heating plate is directly clamped between the positive and negative electrode plates, and the heating plate is arranged in a serpentine cycle, and its path becomes the necessary path for current; the heating position is precisely controlled, and more heat is generated under the same power; the heat is directly transferred to the positive and negative electrode plates, greatly improving energy utilization.
[0008] Further preferably, the corners of the heating plate are in a "C-shape" or "half-circle" or "half-racetrack" or "half-ellipse" shape.
[0009] Further preferably, the width of the heating plate is set to 0.5-50 mm.
[0010] Further preferably, positive and negative electrode terminals are connected to both sides of the upper end of the heating plate.
[0011] A battery comprises a shell, a top cover, a negative terminal, a heating terminal, a positive terminal, a battery cell and the above-mentioned heating plate, wherein the battery cell and the heating plate are installed in the shell, the top cover is sealed and connected to the shell, the negative terminal, the heating terminal and the positive terminal are installed on the surface of the top cover, the positive electrode tab and the negative electrode tab of the battery cell are connected to the positive terminal and the negative terminal respectively, the positive terminal of the heating plate is connected to the heating terminal, the negative terminal of the heating plate is connected to the negative terminal, and a protective switch is provided between the heating terminal and the positive terminal.
[0012] Further preferably, the battery cell includes a positive electrode sheet and a negative electrode sheet, and the heating sheet is sandwiched between the positive electrode sheet and the negative electrode sheet.
[0013] Compared with the prior art, the beneficial effects of the present invention are:
[0014] The utility model directly sandwiches the heating plate between the positive and negative electrodes, and the heating plates are arranged in a serpentine cycle, and their path becomes the necessary path for current; the heating position is precisely controlled, and more heat is generated under the same power; it directly transfers heat to the positive and negative electrodes, greatly improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 Schematic diagram of the heating plate structure Figure 1 ;
[0016] Figure 2 Schematic diagram of the heating plate structure Figure 2 ;
[0017] Figure 3 Schematic diagram of the heating plate structure Figure 3 ;
[0018] Figure 4 This is a schematic diagram of battery assembly;
[0019] Figure 5 This is a schematic diagram of an explosion when the heating plate is installed in the battery cell;
[0020] Figure 6 This is a circuit diagram of the connection between the positive electrode, negative electrode and heating plate.
[0021] In the figure: heating plate 1, hollow groove 11, terminal 12, negative electrode plate 2, positive electrode plate 3, shell 4, top cover 5, negative terminal 6, heating terminal 7, positive terminal 8. Implementation Method
[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0023] Reference Figure 1-Figure 3 A battery electrode comprises a heating plate 1, wherein a hollow groove 11 is formed on the heating plate 1, the heating plate 1 is symmetrically arranged on the left and right sides and arranged in a serpentine shape, the width A of the heating plate 1 is equal to the width B of the hollow groove 11, the corners of the heating plate 1 are in a "C-shaped" or "half-circular" or "half-runway" or "half-elliptical" shape, and the positive and negative terminal 12 are connected to both sides of the upper end of the heating plate 1.
[0024] In the embodiment, hollow grooves 11 are provided on the surface of the heating plate 1, so that the heating plate 1 is arranged in a serpentine shape. Figure 1 The corner of the heating plate 1 is a "half-loop" structure. Figure 2 The corner of the heating plate 1 is a "half-runway" structure. Figure 3 The corners of the heating plate 1 are in a "C-shaped" structure.
[0025] The heating plate 1 is directly sandwiched between the positive and negative electrodes, and the heating plates are arranged in a serpentine cycle, and its path becomes the necessary path for current; the heating position is precisely controlled, and more heat is generated under the same power; it directly transfers heat to the positive and negative electrodes, greatly improving energy utilization.
[0026] The width A of the heating plate 1 is set to 0.5-50 mm.
[0027] In the embodiment, the width of the heating plate 1 can be uniform or uneven. The heating part of the heating plate 1 can be uniform or narrow, so that more heat can be generated under the same power; the heating part of the heating plate 1 can be uneven in width and designed with wide and narrow alternating widths, so that it is convenient to control where the heating part is heated and perform precise control.
[0028] Reference Figure 4-Figure 6 , a battery, comprising a shell 4, a top cover 5, a negative terminal 6, a heating terminal 7, a positive terminal 8, a battery cell and the above-mentioned heating plate 1, the battery cell and the heating plate 1 are installed in the shell 4, the top cover 5 is sealed and connected to the shell 4, the negative terminal 6, the heating terminal 7 and the positive terminal 8 are installed on the surface of the top cover 5, the positive pole ear and the negative pole ear of the battery cell are connected to the positive terminal 8 and the negative terminal 6 respectively, the positive terminal of the heating plate is connected to the heating end, and the negative terminal of the heating plate is connected to the negative terminal 6, a protection switch is provided between the heating end and the positive terminal, the battery cell comprises a positive electrode sheet 3 and a negative electrode sheet 2, and the heating plate 1 is sandwiched between the positive electrode sheet 3 and the negative electrode sheet 2.
[0029] In the embodiment: a heating plate is arranged inside the battery cell, and the heating end is connected to the positive end by closing the switch to form a battery self-heating closed loop, so that the battery can self-heat to room temperature in a short time at low temperature, so that the energy density and output power of the battery are not affected by the low temperature environment, and the battery can maintain normal operation at low temperatures, thereby improving the reliability of the battery during use and increasing the battery life.
[0030] The utility model directly sandwiches the heating plate between the positive and negative electrodes, and the heating plates are arranged in a serpentine cycle, and their path becomes the necessary path for current; the heating position is precisely controlled, and more heat is generated under the same power; the heat is directly transferred to the positive and negative electrodes, greatly improving the energy utilization rate.
Claims
1. A battery electrode, characterized in that: It includes a positive electrode sheet, a negative electrode sheet and a heating sheet directly sandwiched between the positive electrode sheet and the negative electrode sheet. The heating sheet is provided with a hollow groove. The heating sheet is symmetrically arranged and arranged in a serpentine shape. The width of the heating sheet is equal to the width of the hollow groove.
2. A battery electrode according to claim 1, characterized in that: The corners of the heating plate are in a "C-shaped" or "half-circle" or "half-racetrack" or "half-ellipse" shape.
3. A battery electrode according to claim 1, characterized in that: The width of the heating plate is set to 0.5-50 mm.
4. A battery electrode according to claim 1, characterized in that: Both sides of the upper end of the heating plate are connected with positive and negative electrode terminals.
5. A battery, characterized in that: It includes a shell, a top cover, a negative terminal, a heating terminal, a positive terminal, a battery cell and a heating plate as described in any one of claims 1 to 4, the battery cell and the heating plate are installed in the shell, the top cover is sealed and connected to the shell, the negative terminal, the heating terminal and the positive terminal are installed on the surface of the top cover, the positive pole tab and the negative pole tab of the battery cell are connected to the positive terminal and the negative terminal respectively, the positive terminal of the heating plate is connected to the heating end, the negative terminal of the heating plate is connected to the negative end, and a protection switch is provided between the heating end and the positive end.
6. A battery according to claim 5, characterized in that: The battery core includes a positive electrode sheet and a negative electrode sheet, and the heating sheet is sandwiched between the positive electrode sheet and the negative electrode sheet.