A square battery

Abstract

The utility model discloses a square battery, including battery shell and top cap, the inside of battery shell is provided with electric core, the middle part of battery shell is provided with high heat conduction element, high heat conduction element is connected together with the bottom of battery shell through the welding mode, the electric core is wound in the outside of high heat conduction element. The product adopts high heat conduction element to place in the central surface of electric core, aims at through effective heat conduction maximization and keeps the overall temperature uniformity of electric core, improves the overall temperature uniformity of electric core while ensuring the reliability, the leakproofness and the insulation of the inside winding structure and overall structure of electric core.

Description

Technical Field

[0001] This utility model belongs to the field of lithium battery equipment technology, and specifically relates to a square battery. Background Technology

[0002] With the continuous development of battery technology, the requirements for battery performance are becoming increasingly stringent, especially temperature uniformity, which is crucial for battery lifespan and safety. Traditional batteries, when operating at high power, can only conduct heat to the outside through the internal electrolyte and multiple layers of current collectors. This heat conduction resistance is significant, resulting in large temperature differences within the battery, with the center of the cell often experiencing higher temperatures. This leads to heat concentration and uneven temperature distribution, thus affecting battery performance and safety. Therefore, there is an urgent need for a structural design that can effectively manage the internal heat distribution of the battery to improve overall temperature uniformity. Utility Model Content

[0003] The purpose of this invention is to provide a square battery to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A square battery includes a battery casing and a top cover. A battery cell is disposed inside the battery casing. A high thermal conductivity element is disposed in the middle of the battery casing. The high thermal conductivity element is connected to the bottom of the battery casing by welding. The battery cell is wound around the outside of the high thermal conductivity element.

[0006] By adopting the above technical solution, by adding a high thermal conductivity element to the center of the battery and connecting it to the bottom of the battery casing, the heat inside the cell has an additional fast heat conduction path through the center, which greatly increases the heat dissipation capacity of the battery and maintains the temperature uniformity of the battery. The high thermal conductivity element welded to the bottom of the battery casing ensures that the reliability of the battery is consistent with the original design, and maintains the original mechanical reliability while improving the temperature uniformity performance.

[0007] Preferably, the high thermal conductivity element is a heat-conducting plate or a flat heat pipe, used to conduct the heat from the center of the battery cell along the center surface to the bottom of the battery casing.

[0008] By adopting the above technical solution, both the heat-conducting plate and the flat heat pipe are excellent high thermal conductivity elements, which can quickly dissipate the heat generated by the battery cell during operation through the center surface.

[0009] Preferably, the material of the metal heat-conducting plate is selected from copper, aluminum, copper-aluminum composite plate, nickel, titanium, or copper-nickel composite plate.

[0010] Preferably, the flat heat pipe is made of aluminum, copper, or nickel-plated copper.

[0011] By adopting the above technical solutions: copper or copper-aluminum composite plates are suitable for rapid thermal diffusion in high-rate charge and discharge scenarios; aluminum achieves optimal economy in cost-sensitive energy storage batteries; and nickel and titanium-based materials meet the reliability requirements of special batteries in extreme environments.

[0012] Preferably, the battery cell includes a cathode plate, an anode plate, and a separator, with a separator disposed between the cathode plate and the anode plate.

[0013] By adopting the above technical solution, the combination of the battery cell composed of diaphragm and electrode sheet with the high thermal conductivity element forces the heat to be conducted longitudinally to the central thermal conductivity element, thereby improving thermal management efficiency.

[0014] Preferably, the top cover is provided with an anode column and a cathode column, the anode column being connected to the anode plate and the cathode plate being connected to the cathode column.

[0015] By adopting the above technical solution, the column welding and battery top cover assembly lines are convenient.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] By adding a high thermal conductivity element to the center of the battery and connecting it to the bottom of the battery casing, the heat inside the cell has an additional fast heat conduction path through the center, which greatly increases the battery's heat dissipation capacity and maintains the battery's temperature uniformity. The high thermal conductivity element welded to the bottom of the battery casing ensures that the battery's reliability is consistent with the original design, and maintains the original mechanical reliability while improving temperature uniformity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the internal structure of the battery casing in this utility model;

[0020] Figure 3 This is a schematic diagram of the battery cell structure in this utility model.

[0021] In the diagram: 1. Battery casing; 2. Top cover; 21. Anode post; 22. Cathode post; 3. Battery cell; 31. Cathode plate; 32. Anode plate; 33. Separator; 4. High thermal conductivity element. Detailed Implementation

[0022] The following will refer to the appendix in the embodiments of this utility model. Figures 1-3The technical solutions in the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The specific embodiments described herein are merely used to explain this utility model and are not intended to limit this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Example:

[0024] like Figures 1-3 As shown, this utility model provides a square battery, including a battery casing 1 and a top cover 2. A battery cell 3 is disposed inside the battery casing 1, and a high thermal conductivity element 4 is disposed in the middle of the battery casing 1. The high thermal conductivity element 4 is connected to the bottom of the battery casing 1 by welding. The battery cell 3 is wound around the outside of the high thermal conductivity element 4. By adding the high thermal conductivity element 4 at the center of the battery and connecting it to the bottom of the battery casing, the heat inside the battery cell 3 has an additional fast heat conduction path through the center, which can greatly increase the heat dissipation capacity of the battery and thus maintain the temperature uniformity of the battery. The high thermal conductivity element 4 welded to the bottom of the battery casing 1 ensures that the reliability of the battery is consistent with the original design, and maintains the original mechanical reliability while improving the temperature uniformity performance.

[0025] The high thermal conductivity element 4 is a heat-conducting plate or a flat heat pipe, used to conduct the heat from the center of the cell 3 along the center surface to the bottom of the battery casing 1. The material of the metal heat-conducting plate is selected from copper, aluminum, copper-aluminum composite plate, nickel, titanium or copper-nickel composite plate. The material of the flat heat pipe is aluminum heat pipe, copper heat pipe or nickel-plated copper heat pipe. Both the heat-conducting plate and the flat heat pipe are good high thermal conductivity elements 4, which can quickly conduct the heat generated by the cell 3 during operation through the center surface. Copper or copper-aluminum composite plate is suitable for rapid heat diffusion in high-rate charge and discharge scenarios. Aluminum achieves the best economy in cost-sensitive energy storage batteries. Nickel and titanium-based materials meet the reliability requirements of special batteries in extreme environments.

[0026] The battery cell 3 includes a cathode plate 31, an anode plate 32, and a separator 33. A separator 33 is provided between the cathode plate 31 and the anode plate 32. An anode post 21 and a cathode post 22 are provided on the top cover 2. The anode post 21 is connected to the anode plate 32, and the cathode plate 31 is connected to the cathode post 22. The battery cell 3, composed of the separator 33 and the electrode plate, works in conjunction with the high thermal conductivity element 4 to force heat to be conducted longitudinally to the central thermal conductivity element, thereby improving thermal management efficiency. The welding of the post body and the assembly line of the battery top cover 2 are convenient.

[0027] In summary, this product's structural design effectively manages the internal heat distribution of the battery, thereby improving the overall temperature uniformity of the battery.

[0028] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A square battery, characterized in that: The battery includes a battery housing (1) and a top cover (2). The battery housing (1) contains a battery cell (3). A high thermal conductivity element (4) is provided in the middle of the battery housing (1). The high thermal conductivity element (4) is connected to the bottom of the battery housing (1) by welding. The battery cell (3) is wound around the outside of the high thermal conductivity element (4).

2. A square battery according to claim 1, characterized in that: The high thermal conductivity element (4) is a heat-conducting plate or a flat heat pipe, used to conduct the heat from the center of the cell (3) along the center surface to the bottom of the battery casing (1).

3. A square battery according to claim 2, characterized in that: The material of the metal heat-conducting plate is selected from copper, aluminum, copper-aluminum composite plate, nickel, titanium, or copper-nickel composite plate.

4. A square battery according to claim 2, characterized in that: The flat heat pipe is made of aluminum, copper, or nickel-plated copper.

5. A square battery according to claim 1, characterized in that: The battery cell (3) includes a cathode plate (31), an anode plate (32) and a separator (33), with a separator (33) disposed between the cathode plate (31) and the anode plate (32).

6. A square battery according to claim 5, characterized in that: The top cover (2) is provided with an anode column (21) and a cathode column (22). The anode column (21) is connected to the anode plate (32), and the cathode plate (31) is connected to the cathode column (22).

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