A new hot press plate
By setting material zones with different thermal conductivity on the hot press plate, the temperature difference of the core can be controlled, which solves the problem of core adhesion after hot pressing, improves electrolyte wetting and ion movement efficiency, and reduces manufacturing time and cost.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI SHUANGDENG ENERGY STORAGE TECHNOLOGY CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-06-12
AI Technical Summary
The uniformity of existing hot-pressed plate materials results in the core positive and negative electrode sheets being tightly bonded to the separator after hot pressing, which affects electrolyte wetting and ion movement. This requires long-term high-temperature wetting, increasing costs and manufacturing cycle.
The first and second thermally conductive zones, made of materials with different thermal conductivity, create a temperature difference, which controls the adhesion of the positive and negative electrode sheets and constructs channels for electrolyte wetting and ion movement.
The tiny pores created by temperature differences improve the electrolyte wetting and ion movement efficiency of the battery, shortening manufacturing time and reducing energy costs.
Smart Images
Figure CN224355227U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery manufacturing, and in particular to a novel hot press plate. Background Technology
[0002] In lithium battery manufacturing, hot pressing is a crucial process that shapes the battery core through heating and pressurization. However, currently used hot pressing plates are all made of the same material. The tight adhesion between the positive and negative electrode sheets and the separator after hot pressing can affect subsequent electrolyte wetting and ion movement during charging and discharging. To eliminate this effect, prolonged high-temperature wetting is required to ensure sufficient electrolyte wetting of the cell. This necessitates significant time and energy costs, substantially impacting battery manufacturing costs and cycle time.
[0003] Therefore, there is an urgent need for a hot press plate that can control the core during the hot pressing process. Utility Model Content
[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a novel hot press plate.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A novel hot press plate is provided, comprising: an insulating layer, a heat-conducting layer, and a heat-spreading layer arranged sequentially from top to bottom;
[0007] The heat-conducting layer includes: a plurality of first heat-conducting zones and second heat-conducting zones arranged alternately.
[0008] Preferably, the thickness of the insulating layer is 30-60 μm.
[0009] More preferably, the insulating layer is a polyimide insulating film.
[0010] Preferably, the thickness of the thermally conductive layer is 1-2 mm.
[0011] Preferably, the first thermally conductive area is an aluminum nitride ceramic plate, and the second thermally conductive area is an anodized aluminum plate.
[0012] Preferably, the width of the first heat-conducting area is 8-12 mm, and the width of the second heat-conducting area is 8-12 mm.
[0013] The present invention adopts the above technical solution and has the following technical effects compared with the prior art:
[0014] This invention uses a first thermally conductive zone and a second thermally conductive zone made of materials with different thermal conductivity properties to enable the hot press plate to have different temperatures, thereby forming different tiny pores during hot pressing, which create channels for electrolyte wetting and ion movement. Attached Figure Description
[0015] Figure 1 This is a side view of a novel hot press plate according to an embodiment of the present invention;
[0016] Figure 2 This is a side view of the hot-pressed core in one embodiment of the present invention.
[0017] The reference numerals in the figure include:
[0018] Insulating layer 1; thermally conductive layer 2; first thermally conductive zone 21; second thermally conductive zone 22; heat-spreading layer 3. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.
[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.
[0022] Example
[0023] This embodiment provides a novel hot press plate, comprising: an insulating layer 1, a heat-conducting layer 2, and a heat-spreading layer 3 arranged sequentially from top to bottom;
[0024] Wherein, the thickness of the insulating layer 1 is 50 μm, and the insulating layer 1 is a polyimide insulating film;
[0025] The thickness of the heat-conducting area 2 is 1 mm. The heat-conducting layer 2 includes: a plurality of first heat-conducting areas 21 and second heat-conducting areas 22 arranged alternately; the first heat-conducting area 21 is made of aluminum nitride ceramic plate and the width a is 10 mm; the second heat-conducting area 22 is made of anodized aluminum plate and the width b is 10 mm.
[0026] The operating principle is as follows:
[0027] Materials with different thermal conductivity will result in different temperatures in different areas. The adhesion between the positive and negative electrodes in the hot-pressed battery cell is mainly affected by pressure and temperature. Under the same pressure, areas with higher temperatures will release more space on the adhesive separator, resulting in a higher degree of adhesion between the positive and negative electrodes, i.e., a smaller distance between the electrodes. Areas with lower temperatures will result in a lower degree of adhesion between the positive and negative electrodes, i.e., a larger distance between the electrodes. The larger distance creates tiny pores, providing channels for electrolyte wetting and ion movement during charging and discharging, thereby improving battery performance.
[0028] In summary, this invention, by setting up a first thermally conductive zone and a second thermally conductive zone made of materials with different thermal conductivity, enables the hot press plate to have different temperatures, thereby forming different tiny pores during hot pressing, which creates channels for electrolyte wetting and ion movement.
[0029] The above description is only a preferred embodiment of the present utility model and does not limit the implementation method and protection scope of the present utility model. Those skilled in the art should realize that all solutions obtained by equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A new hot-pressing plate characterized by, include: The layers arranged from top to bottom are an insulating layer (1), a heat-conducting layer (2), and a heat-spreading layer (3); The heat-conducting layer (2) includes: a plurality of first heat-conducting zones (21) and second heat-conducting zones (22) arranged alternately.
2. The novel hot press plate according to claim 1, characterized in that, The thickness of the insulating layer (1) is 30-60 μm.
3. The novel hot press plate according to claim 2, wherein The insulating layer (1) is a polyimide insulating film.
4. The novel hot press plate according to claim 1, characterized in that, The thickness of the heat-conducting layer (2) is 1-2 mm.
5. The novel hot press plate according to claim 1, characterized in that, The first heat-conducting area (21) is an aluminum nitride ceramic plate, and the second heat-conducting area (22) is an anodized aluminum plate.
6. The novel hot press plate according to claim 1, characterized in that, The width of the first heat-conducting area (21) is 8-12 mm, and the width of the second heat-conducting area (22) is 8-12 mm.