Cover plate, cover plate assembly and solid-state battery

Abstract

The present disclosure provides a cover plate, a cover plate assembly and a solid-state battery. The cover plate is used for being mounted on the cover plate assembly. A side surface of the cover plate is formed with a mounting groove by means of extruding. The side surface of the cover plate away from the mounting groove is formed with an extrusion boss. The extrusion boss is arranged correspondingly to the mounting groove. The mounting groove is used for mounting a first plastic part for positioning the cover plate assembly. The extrusion boss is provided with a pole mounting hole. The pole mounting hole is communicated with the mounting groove. The pole mounting hole is used for mounting a pole fixed to the cover plate assembly. The cover plate can not only improve the use safety of the solid-state battery, but also prolong the service life of the solid-state battery.

Description

Technical Field

[0001] This disclosure relates to the technical field of solid-state batteries, and in particular to a cover plate, a cover plate assembly, and a solid-state battery. Background Technology

[0002] In solid-state batteries, the cover plate plays a crucial role. It is not only an important component of the battery structure but also bears multiple functions and safety responsibilities. The cover plate typically needs to have mounting grooves at the location of the terminal mounting holes to accommodate plastic components. This allows the plastic components to provide electrical insulation and cushioning for the terminals, and also seals the gap between the terminals and the walls of the mounting holes. Currently available cover plates, such as the top cover and power battery proposed in patent CN220209116U, include a body, terminals, upper plastic, and a welding ring. The body has mounting holes and mounting grooves coaxial with the mounting holes. The lower end face of the terminals extends circumferentially to form a limiting protrusion, fixing the terminals through the mounting holes. The upper plastic is fitted onto the terminals and installed in the mounting groove.

[0003] However, the aforementioned top cover, due to the mounting groove on the main body, makes the part of the main body located in the mounting groove thinner, resulting in lower structural strength. Consequently, during daily use, the main body of the solid-state battery is prone to damage or breakage due to impacts, vibrations, or other external factors, greatly reducing the lifespan of the solid-state battery. Utility Model Content

[0004] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a cover plate, cover plate assembly and solid-state battery that not only have better safety in use, but also have a longer service life.

[0005] The purpose of this disclosure is achieved through the following technical solution:

[0006] A cover plate is used for mounting on a cover plate assembly. One side of the cover plate is pressed to form a mounting groove, so that a pressing boss is formed on the side of the cover plate opposite to the mounting groove. The pressing boss is correspondingly provided with the mounting groove. The mounting groove is used to install and position a first plastic part of the cover plate assembly. The pressing boss has a pole mounting hole, which communicates with the mounting groove. The pole mounting hole is used to install and fix a pole to the cover plate assembly.

[0007] In one embodiment, the piercing boss is formed with a foolproof guide surface.

[0008] In one embodiment, the mounting groove has a polygonal cross-section.

[0009] In one embodiment, the corners of the pressing boss are rounded.

[0010] In one embodiment, the cross-section of the pressing boss is polygonal.

[0011] In one embodiment, there are two mounting slots; there are two pressing protrusions, namely a first pressing protrusion and a second pressing protrusion, each pressing protrusion being correspondingly provided with a mounting slot; the electrode mounting hole includes a positive electrode mounting hole and a negative electrode mounting hole, the positive electrode mounting hole being opened in the first pressing protrusion, the negative electrode mounting hole being opened in the second pressing protrusion, and both the positive electrode mounting hole and the negative electrode mounting hole being connected to the corresponding mounting slot.

[0012] In one embodiment, the number of positive terminal mounting holes and the number of negative terminal mounting holes are both two.

[0013] In one embodiment, the cover plate is further formed with an explosion-proof hole for installing an explosion-proof valve of the cover plate assembly, and the inner peripheral wall of the explosion-proof hole is formed with a flange.

[0014] A cover plate assembly for mounting and fixing to a solid-state battery includes a first plastic part, an electrode post, and a cover plate as described in any of the above embodiments. The electrode post passes through the electrode post mounting hole. The first plastic part is sleeved on the electrode post and installed in the mounting groove, and a portion of the first plastic part extends into the electrode post mounting hole to seal the gap between the hole wall of the electrode post mounting hole and the electrode post.

[0015] In one embodiment, the cover plate assembly further includes a second plastic component disposed within the electrode mounting hole and abutting against the first plastic component to seal the gap between the hole wall of the electrode mounting hole and the electrode, and a portion of the second plastic component extends to a side of the cover plate opposite to the mounting groove.

[0016] A solid-state battery includes an electrode assembly and a cover assembly as described in any of the above embodiments.

[0017] Compared with the prior art, this disclosure has at least the following advantages:

[0018] The aforementioned cover plate has an mounting groove formed on one side by pressing, resulting in a pressing boss on the side of the cover plate away from the mounting groove. The pressing boss is correspondingly set with the mounting groove, which increases the thickness of the portion of the cover plate located at the mounting groove. This improves the structural strength of the cover plate and greatly enhances its impact resistance and durability. This prevents damage or even destruction of the cover plate due to the thinness of the portion at the mounting groove when subjected to a large impact, thus significantly extending the service life of the solid-state battery. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the cover plate in one embodiment;

[0021] Figure 2 for Figure 1 A schematic cross-sectional view of the cover plate at point AA;

[0022] Figure 3 for Figure 2 A partially enlarged schematic diagram of the cover plate shown;

[0023] Figure 4 for Figure 2 Another enlarged view of a portion of the cover plate shown;

[0024] Figure 5 for Figure 2 Another enlarged schematic diagram of the cover plate shown;

[0025] Figure 6 for Figure 1 Another perspective view of the cover plate is shown;

[0026] Figure 7 for Figure 1 Another perspective view of the cover plate shown;

[0027] Figure 8 This is a schematic diagram of the structural model of the cover plate. Detailed Implementation

[0028] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments:

[0032] like Figures 1 to 8 As shown, in one embodiment, a cover plate 10 is used for mounting on a cover plate assembly. One side of the cover plate 10 is formed by pressing to create a mounting groove 100, and a pressing boss 200 is formed on the side of the cover plate 10 facing away from the mounting groove 100. The pressing boss 200 corresponds to the mounting groove 100, allowing the cover plate 10 to increase the thickness of the portion located at the mounting groove 100 through the pressing boss 200. This improves the structural strength of the cover plate 10, significantly enhancing its impact resistance and durability. This prevents damage or even breakage of the cover plate 10 due to the thinness of the portion at the mounting groove 100 when subjected to significant impact, thus greatly extending the lifespan of the solid-state battery. The mounting groove 100... The first plastic part is used for installing the positioning cover assembly; the pressing boss 200 has a terminal mounting hole 210, which is connected to the mounting groove 100. The terminal mounting hole 210 is used to install and fix the terminal to the cover assembly, so that the cover 10 can reliably fix the terminal and prevent the terminal from loosening or even rotating relative to the cover 10 under external force, thereby greatly improving the stability of the solid-state battery. At the same time, the first plastic part can not only provide electrical insulation and buffering for the terminal, but also seal the gap between the terminal and the hole wall of the terminal mounting hole 210, so as to ensure that the cover assembly has good sealing performance and further improve the stability of the solid-state battery.

[0033] The aforementioned cover plate 10 has an mounting groove 100 formed on one side by pressing, so that a pressing boss 200 is formed on the side of the cover plate 10 away from the mounting groove 100. The pressing boss 200 is correspondingly arranged with the mounting groove 100, so that the cover plate 10 can increase the thickness of the part located at the mounting groove 100 through the pressing boss 200, thereby improving the structural strength of the cover plate 10 and greatly improving the impact resistance and durability of the cover plate 10. This avoids the phenomenon that the cover plate 10 is damaged or even destroyed when subjected to a large impact force due to the thinness of the part at the mounting groove 100, and greatly extends the service life of the solid-state battery.

[0034] like Figure 6 As shown, in one embodiment, the pressing boss 200 is formed with a foolproof guide surface 220 so that the cover plate 10 can be accurately installed at the preset position of the solid-state battery through the foolproof guide surface 220, avoiding the phenomenon that the solid-state battery needs to be reworked due to the misalignment of the cover plate 10 during the assembly process, thereby greatly improving the production efficiency of the solid-state battery.

[0035] like Figure 7 As shown, in one embodiment, the cross-section of the mounting groove 100 is polygonal so that the first plastic part can be securely confined within the mounting to prevent the first plastic part from loosening or even rotating relative to the cover plate 10 when subjected to external forces, thus ensuring the cover plate assembly.

[0036] like Figure 6 As shown, in one embodiment, the corners of the pressing boss 200 are rounded to prevent the solid-state battery from being damaged or even destroyed by the sharp corners of the pressing boss 200 during assembly or daily use, thereby greatly improving the stability of the solid-state battery.

[0037] like Figure 1 and Figure 6 As shown, in one embodiment, the cross-section of the pressing boss 200 is polygonal, so that the cover plate 10 can be securely fixed to the preset position of the solid-state battery by the pressing boss 200, thereby improving the stability of the solid-state battery in use.

[0038] In this embodiment, the electrode includes a positive electrode and a negative electrode.

[0039] like Figures 1 to 6As shown, in one embodiment, there are two mounting slots 100; there are two pressing protrusions 200, namely a first pressing protrusion 230 and a second pressing protrusion 240. Each pressing protrusion 200 is correspondingly provided with a mounting slot 100. The electrode mounting hole 210 includes a positive electrode mounting hole 211 and a negative electrode mounting hole 212. The positive electrode mounting hole 211 is opened in the first pressing protrusion 230, and the negative electrode mounting hole 212 is opened in the second pressing protrusion 240. Both the positive electrode mounting hole 211 and the negative electrode mounting hole 212 are connected to the corresponding mounting slots 100, so that the positive electrode can be installed and fixed on the cover plate 10 through the positive electrode mounting hole 211, and the negative electrode can be installed and fixed on the cover plate 10 through the negative electrode mounting hole 212, so as to avoid the electrode from loosening or even rotating relative to the cover plate 10 under the action of external force, which greatly improves the stability of solid-state battery use.

[0040] like Figure 1 As shown, in one embodiment, there are two positive terminal mounting holes 211 and two negative terminal mounting holes 212, so that the positive terminal and the negative terminal can be more securely fixed on the cover plate 10, effectively preventing the positive terminal and the negative terminal from loosening or even rotating relative to the cover plate 10 under the action of external force, thereby greatly improving the stability of solid-state battery use.

[0041] like Figure 5 and Figure 6 As shown, in one embodiment, the cover plate 10 also has an explosion-proof hole 300. The explosion-proof hole 300 is used to install the explosion-proof valve of the cover plate assembly, so that when the solid-state battery experiences a sharp increase in pressure due to an abnormal reaction, the solid-state battery can release pressure through the explosion-proof hole 300, preventing the solid-state battery from exploding due to excessive internal pressure, thus greatly improving the safety of the solid-state battery. The inner peripheral wall of the explosion-proof hole 300 has a flange 310 to improve the structural strength of the cover plate 10, enhance the impact resistance of the cover plate 10, and extend the service life of the cover plate 10. At the same time, the inner peripheral wall of the explosion-proof hole 300 can also be more tightly pressed against the explosion-proof valve through the flange 310 to improve the sealing performance of the explosion-proof hole 300, prevent the electrolyte or other harmful substances inside the solid-state battery from leaking from the explosion-proof hole 300, and thus ensure that the solid-state battery can maintain stable normal operation, greatly improving the stability of the solid-state battery.

[0042] like Figures 1 to 7As shown, this disclosure also provides a cover plate assembly, including a first plastic part, an electrode post, and a cover plate 10 as described in any of the above embodiments. The electrode post passes through an electrode post mounting hole 210. The first plastic part is sleeved on the electrode post and installed in the mounting groove 100, and a portion of the first plastic part extends into the electrode post mounting hole 210 to seal the gap between the hole wall of the electrode post mounting hole 210 and the electrode post. This allows the first plastic part to not only insulate and isolate the electrode post, but also to buffer the electrode post, reducing the external impact force on the electrode post, thereby improving the stability and safety of solid-state battery use. At the same time, the first plastic part can also seal the gap between the electrode post and the hole wall of the electrode post mounting hole 210 to ensure that the cover plate assembly has good sealing performance, further improving the stability of solid-state battery use.

[0043] like Figure 6 As shown, in one embodiment, the cover plate assembly further includes a second plastic part, which is disposed in the terminal mounting hole 210 and abuts against the first plastic part to seal the gap between the hole wall of the terminal mounting hole 210 and the terminal. A portion of the second plastic part extends to the side of the cover plate 10 opposite to the mounting groove 100, so that the first plastic part and the second plastic part can cooperate to insulate and isolate the terminal, and further reduce the external impact force on the terminal, greatly improving the stability and safety of the solid-state battery. At the same time, it can further improve the sealing performance of the cover plate assembly, thereby greatly improving the stability of the solid-state battery.

[0044] This disclosure also provides a solid-state battery, including the cover assembly described in any of the above embodiments.

[0045] Compared with the prior art, this disclosure has at least the following advantages:

[0046] In the aforementioned solid-state battery, a mounting groove 100 is formed on one side of the cover plate 10 by pressing, and a pressing boss 200 is formed on the side of the cover plate 10 away from the mounting groove 100. The pressing boss 200 is correspondingly arranged with the mounting groove 100, so that the thickness of the part of the cover plate 10 located at the mounting groove 100 can be increased by the pressing boss 200, thereby improving the structural strength of the cover plate 10 and greatly improving the impact resistance and durability of the cover plate 10. This avoids the phenomenon that the cover plate 10 is damaged or even destroyed when subjected to a large impact force due to the thinness of the part at the mounting groove 100, and greatly extends the service life of the solid-state battery.

[0047] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A cover plate for mounting on a cover plate assembly, characterized in that, One side of the cover plate is pressed to form an installation groove, so that the side of the cover plate opposite to the installation groove forms a pressing boss. The pressing boss is correspondingly provided with the installation groove. The installation groove is used to install and position the first plastic part of the cover plate assembly. The pressing boss has a pole mounting hole, which is connected to the installation groove. The pole mounting hole is used to install and fix the pole to the cover plate assembly.

2. The cover plate according to claim 1, characterized in that, The pier protrusion has a foolproof guide surface.

3. The cover plate according to claim 1, characterized in that, The mounting groove has a polygonal cross-section.

4. The cover plate according to claim 3, characterized in that, The corners of the pressing boss are rounded; and / or, The cross-section of the pier pressing boss is polygonal.

5. The cover plate according to claim 1, characterized in that, The number of mounting slots is two; the number of pressing protrusions is two, namely a first pressing protrusion and a second pressing protrusion. Each pressing protrusion is correspondingly provided with a mounting slot. The electrode mounting hole includes a positive electrode mounting hole and a negative electrode mounting hole. The positive electrode mounting hole is opened in the first pressing protrusion, and the negative electrode mounting hole is opened in the second pressing protrusion. Both the positive electrode mounting hole and the negative electrode mounting hole are connected to the corresponding mounting slot.

6. The cover plate according to claim 5, characterized in that, The number of positive terminal mounting holes and the number of negative terminal mounting holes are both two.

7. The cover plate according to claim 1, characterized in that, The cover plate also has an explosion-proof hole for installing an explosion-proof valve of the cover plate assembly, and the inner peripheral wall of the explosion-proof hole has a flange.

8. A cover plate assembly for mounting on a solid-state battery, characterized in that, The device includes a first plastic component, an electrode post, and a cover plate according to any one of claims 1 to 7. The electrode post passes through the electrode post mounting hole, the first plastic component is sleeved on the electrode post and installed in the mounting groove, and a portion of the first plastic component extends into the electrode post mounting hole to seal the gap between the hole wall of the electrode post mounting hole and the electrode post.

9. The cover plate assembly according to claim 8, characterized in that, The cover plate assembly further includes a second plastic part, which is disposed in the pole mounting hole and abuts against the first plastic part to seal the gap between the hole wall of the pole mounting hole and the pole, and a portion of the second plastic part extends to one side of the cover plate away from the mounting groove.

10. A solid-state battery, characterized in that, The cover assembly according to any one of claims 8 to 9.

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