End plate of solid-state battery, case, and solid-state battery

Abstract

An end plate of a solid-state battery, a case and a solid-state battery. The end plate comprises an end plate body, wherein the end plate body comprises at least one end portion; a planar portion and one or more inclined portions are provided on the side of the end plate body close to battery cells; and one end of each inclined portion is connected to the planar portion, and the other end of each inclined portion is connected to the end portion, so as to form an end plate having a frustum structure.

Description

Solid-state battery end plate, housing and solid-state battery

[0001] This application claims priority to Chinese Patent Application No. 202520208600.0, filed with the Chinese Patent Office on February 8, 2025, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of solid-state battery technology, specifically to an end plate, housing, and solid-state battery. Background Technology

[0003] Solid-state batteries are a battery technology that uses a solid electrolyte instead of a traditional liquid electrolyte, offering significant advantages such as high energy density and high safety. The endplate of a solid-state battery is a key component ensuring the stability and performance of the battery stack. It can be configured to fix the battery cells and tightly connect them together using bolts or other fasteners, thereby ensuring the stability and reliability of the solid-state battery. Technical issues

[0004] However, solid-state batteries expand to a certain extent during charging. The cells in contact with the end plate will generate expansion force, which will cause a certain degree of compression to the end plate, making the end plate very easy to deform. Technical solutions

[0005] In a first aspect, this application provides an end plate for a solid-state battery, including an end plate body, the end plate body including at least one end, and the side of the end plate body near the battery cell having a planar portion and one or more inclined portions.

[0006] One end of the inclined section is connected to the flat section, and the other end of the inclined section is connected to the end plate to form a frustum-shaped end plate.

[0007] In one implementation, the end plate body includes four ends, namely a first end, a second end, a third end and a fourth end, and the inclined portion includes a first inclined portion, a second inclined portion, a third inclined portion and a fourth inclined portion;

[0008] One end of the first inclined portion, one end of the second inclined portion, one end of the third inclined portion, and one end of the fourth inclined portion are respectively connected to the first end, the second end, the third end, and the fourth end. The other ends of the first inclined portion, the second inclined portion, the third inclined portion, and the fourth inclined portion are all connected to the planar portion to form a frustum-shaped end plate.

[0009] In one implementation, the planar portion, the first inclined portion, the second inclined portion, the third inclined portion, and the fourth inclined portion are integrally formed.

[0010] In one implementation, a reinforcing rib is provided on the side of the end plate body away from the battery cell; the reinforcing rib is integrally formed with the end plate body on the side of the end plate body away from the battery cell.

[0011] In one implementation, the reinforcing rib includes a main body; the end plate body includes four ends, namely a first end, a second end, a third end, and a fourth end;

[0012] The main body is connected to the first end and the third end respectively; the first end and the third end are two ends corresponding to the end plate body, and the second end and the fourth end are two ends corresponding to the end plate body.

[0013] In one implementation, the reinforcing rib further includes a first reinforcing part, a second reinforcing part, a third reinforcing part, a fourth reinforcing part, and a fifth reinforcing part located on one side of the main body;

[0014] One end of the first reinforcing part, one end of the second reinforcing part, one end of the third reinforcing part, one end of the fourth reinforcing part, and one end of the fifth reinforcing part are all connected to the main body part, and the other ends of the first reinforcing part, the second reinforcing part, the third reinforcing part, the fourth reinforcing part, and the fifth reinforcing part are all connected to the second end.

[0015] In one implementation, at least one first groove is formed between the first reinforcing portion and the second reinforcing portion, between the second reinforcing portion and the third reinforcing portion, between the third reinforcing portion and the fourth reinforcing portion, and between the fourth reinforcing portion and the fifth reinforcing portion, and the opening of the first groove extends to the second end.

[0016] In one implementation, the reinforcing ribs also include a sixth, seventh, eighth, ninth, and tenth reinforcing part located on the other side of the main body;

[0017] One end of the sixth reinforcing part, one end of the seventh reinforcing part, one end of the eighth reinforcing part, one end of the ninth reinforcing part, and one end of the tenth reinforcing part are all connected to the main body part, and the other ends of the sixth reinforcing part, the seventh reinforcing part, the eighth reinforcing part, the ninth reinforcing part, and the tenth reinforcing part are all connected to the fourth end.

[0018] In one implementation, the first reinforcing part and the sixth reinforcing part are symmetrically arranged, the second reinforcing part and the seventh reinforcing part are symmetrically arranged, the third reinforcing part and the eighth reinforcing part are symmetrically arranged, the fourth reinforcing part and the ninth reinforcing part are symmetrically arranged, and the fifth reinforcing part and the tenth reinforcing part are symmetrically arranged.

[0019] Secondly, this application also provides a housing, comprising:

[0020] Two end plates provided by the first party are arranged opposite to each other;

[0021] The first side plate is connected to the two end plates respectively;

[0022] The second side plate is positioned opposite to the first side plate and is connected to the two end plates respectively;

[0023] The cover plate is connected to the first side plate, the second side plate, and the two end plates respectively;

[0024] The base plate is positioned opposite the cover plate and is connected to the first side plate, the second side plate, and the two end plates respectively.

[0025] In one implementation, the inclined portion includes a first inclined portion; the first inclined portion is provided with at least one first mounting hole, the first mounting hole being configured to connect the first inclined portion to a cover plate; or / and

[0026] The inclined portion includes a second inclined portion; the second inclined portion is provided with at least one second mounting hole, which is configured to achieve a fixed connection between the second inclined portion and the base plate.

[0027] In one implementation, the second inclined portion is provided with a second groove, the opening of the second groove extending to the end of the end plate body, and a second mounting hole is provided within the second groove; or / and,

[0028] The first mounting hole and the second mounting hole have the same diameter.

[0029] In one implementation, the inclined portion includes a third inclined portion; the third inclined portion is provided with at least one third mounting hole, the third mounting hole being configured to connect the third inclined portion to the first side plate; or / and

[0030] The inclined portion includes a fourth inclined portion; the fourth inclined portion is provided with at least one fourth mounting hole, which is configured to enable the fourth inclined portion to be connected to the second side plate.

[0031] In one implementation, the solid-state battery includes multiple housings;

[0032] The third inclined portion is provided with at least one first positioning groove, which is configured to connect two adjacent housings; or / and

[0033] The fourth inclined portion is provided with at least one second positioning groove, which is configured to connect two adjacent boxes.

[0034] In one implementation, the third inclined portion is provided with a third groove, the opening of the third groove extending to the end of the end plate body, and a third mounting hole is provided within the third groove; or / and,

[0035] The fourth inclined portion is provided with a fourth groove, the opening of which extends to the end of the end plate body, and a fourth mounting hole is provided within the fourth groove; or / and,

[0036] The third and fourth mounting holes have the same diameter.

[0037] Thirdly, this application also provides a solid-state battery, including at least one battery module, the battery module including at least one cell and the housing provided in the second aspect, the cell being assembled in the housing. Beneficial effects

[0038] The end plate of the solid-state battery provided in this application includes an end plate body, the end plate body includes at least one end, and the end plate body has a flat portion and one or more inclined portions on the side near the cell. One end of the inclined portion is connected to the flat portion, and the other end of the inclined portion is connected to the end, so as to form a frustum-shaped end plate. This can effectively transmit and disperse the expansion force generated by the cell without increasing the thickness of the end plate, and can also improve the overall structural strength of the end plate and extend the service life of the end plate. Attached Figure Description

[0039] Figure 1 is a schematic diagram of the first structure of the end plate of the solid-state battery provided in this application;

[0040] Figure 2 is a schematic diagram of the second structure of the end plate of the solid-state battery provided in this application;

[0041] Figure 3 is a schematic diagram of the third structure of the end plate of the solid-state battery provided in this application;

[0042] Figure 4 is a schematic diagram of the structure of the box provided in this application after it has been unfolded.

[0043] Reference numerals: 1. End plate; 10. End plate body; 11. First end portion; 12. Second end portion; 13. Third end portion; 14. Fourth end portion; 100. Flat portion; 200. Inclined portion; 210. First inclined portion; 211. First mounting hole; 220. Second inclined portion; 221. Second mounting hole; 222. Second groove; 230. Third inclined portion; 231. Third mounting hole; 232. Fifth mounting hole; 233. Third groove; 240. Fourth inclined portion; 241. Fourth mounting hole; 242. Sixth mounting hole; 243. Fourth groove 300. Reinforcing rib; 310. Main body; 301. First reinforcing part; 302. Second reinforcing part; 303. Third reinforcing part; 304. Fourth reinforcing part; 305. Fifth reinforcing part; 306. Sixth reinforcing part; 307. Seventh reinforcing part; 308. Eighth reinforcing part; 309. Ninth reinforcing part; 311. Tenth reinforcing part; 312. First groove; 2. First side plate; 3. Second side plate; 4. Cover plate; 5. Bottom plate. Embodiments of the present invention

[0044] In the description of this application, unless otherwise expressly specified and limited, the terms “connected,” “linked,” and “fixed” shall be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; they may refer to the internal connection of two elements or the interaction between two elements.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, where the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, where the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are configured for descriptive distinction and have no special meaning.

[0047] In some embodiments, in the field of lithium metal solid-state batteries, solid-state batteries exhibit significant expansion during charging. To effectively suppress cell expansion, the thickness of the end plates can be increased to prevent cell expansion.

[0048] While increasing the thickness of the end plate can prevent the expansion of lithium metal solid cells to some extent, it will reduce the efficiency of cell assembly. The increased thickness of the end plate will increase the weight of the battery module, which in turn will reduce the energy density of the battery module.

[0049] Therefore, this application provides an end plate for a solid-state battery and a solid-state battery. The end plate includes an end plate body, which includes at least one end. The end plate body has a flat portion and one or more inclined portions on the side near the battery cell. One end of the inclined portion is connected to the flat portion, and the other end of the inclined portion is connected to the end, so as to form a frustum-shaped end plate. This can effectively transmit and disperse the expansion force generated by the battery cell without increasing the thickness of the end plate, and can also improve the overall structural strength of the end plate and extend the service life of the end plate.

[0050] Please refer to Figures 1 and 2. Figure 1 is a schematic diagram of the first structure of the end plate of the solid-state battery provided in this application; Figure 2 is a schematic diagram of the second structure of the end plate of the solid-state battery provided in this application.

[0051] As shown in Figures 1 and 2, this application provides an end plate 1 for a solid-state battery, including an end plate body 10. The end plate body 10 includes at least one end. The end plate body 10 has a flat portion 100 and one or more inclined portions 200 on the side near the battery cell. One end of the inclined portion 200 is connected to the flat portion 100, and the other end of the inclined portion 200 is connected to the end, so as to form a frustum-shaped end plate 1.

[0052] In this embodiment, the platform-shaped structure can be understood as the side of the end plate 1 that contacts the battery cell and has a certain slope. The inclined part 200 can be inclined away from the battery cell. At the same time, the inclined part 200 can be set at the edge of the flat part 100. Specifically, it can be set on one side of the flat part 100, or on two sides of the flat part 100, or on three sides of the flat part 100, or on four sides of the flat part, to form a platform-shaped end plate 1. Thus, without increasing the thickness of the end plate 1, when the battery cell expands, the squeezing force formed by the battery cell on the flat part 100 can be effectively transmitted to the inclined part 200, thereby effectively preventing the end plate from deforming. It can also extend the service life of the bolts between the end plate 1 and the bottom plate, cover plate and side plate, as well as the end plate 1 itself.

[0053] The end plate 1 can be made of various materials, such as metal, epoxy resin, fiberglass board and polyester fiberboard.

[0054] In some embodiments, in order to reduce the weight of end plate 1 and increase the energy density of solid-state battery, end plate 1 may be made of lightweight material, such as aluminum profile.

[0055] The end plate 1 of the solid-state battery provided in this application includes an end plate body 10. The end plate body 10 includes at least one end. The side of the end plate body 10 near the cell is provided with a flat portion 100 and one or more inclined portions 200. One end of the inclined portion 200 is connected to the flat portion 100, and the other end of the inclined portion 200 is connected to the end, so as to form a frustum-shaped end plate 1. This can effectively transmit and disperse the expansion force generated by the cell without increasing the thickness of the end plate 1, and can also improve the overall structural strength of the end plate 1 and extend the service life of the end plate 1.

[0056] In some embodiments, as shown in Figures 1 and 2, the end plate body includes four ends, namely a first end 11, a second end 12, a third end 13, and a fourth end 14. The inclined portion 200 includes a first inclined portion 210, a second inclined portion 220, a third inclined portion 230, and a fourth inclined portion 240. One end of the first inclined portion 210, one end of the second inclined portion 220, one end of the third inclined portion 230, and one end of the fourth inclined portion 240 are respectively connected to the first end 11, the second end 12, the third end 13, and the fourth end 14. The other ends of the first inclined portion 210, the second inclined portion 220, the third inclined portion 230, and the fourth inclined portion 240 are all connected to the flat portion 100 to form a frustum-shaped end plate 1.

[0057] In this embodiment, the first inclined portion 210, the third inclined portion 230, the second inclined portion 220, the third inclined portion 230 and the fourth inclined portion 240 can be arranged sequentially around the edge of the planar portion 100 so that the planar portion 100 is in the middle position. This allows the compressive force on the planar portion 100 to be evenly transmitted and dispersed from the first inclined portion 210, the second inclined portion 220, the third inclined portion 230 and the fourth inclined portion 240, thereby effectively preventing deformation of the end plate 1.

[0058] Specifically, the planar portion 100 may include a first side, a second side, a third side, and a fourth side. The first side and the third side may be two corresponding sides of the planar portion 100, and the third side and the fourth side may be two corresponding sides of the planar portion 100. The first side is adjacent to the second side and the fourth side, and the third side is adjacent to the second side and the fourth side. A first inclined portion 210 may be provided at the first side, a second inclined portion 220 may be provided at the second side, a third inclined portion 230 may be provided at the third side, and a fourth inclined portion 240 may be provided at the fourth side.

[0059] It should be noted that the slopes of the first inclined portion 210, the second inclined portion 220, the third inclined portion 230, and the fourth inclined portion 240 mentioned in this application may be the same or different, and can be selected according to actual application. This application does not make specific limitations.

[0060] In some embodiments, as shown in FIG1 and FIG2, the planar portion 100, the first inclined portion 210, the second inclined portion 220, the third inclined portion 230, and the fourth inclined portion 240 are integrally formed.

[0061] In this embodiment, during the formation of the planar portion 100, the first inclined portion 210, the second inclined portion 220, the third inclined portion 230, and the fourth inclined portion 240, one side of the end plate body 10 can be directly processed so that the planar portion 100, the first inclined portion 210, the second inclined portion 220, the third inclined portion 230, and the fourth inclined portion 240 are directly formed on one side of the end plate body 10.

[0062] In some embodiments, as shown in FIG4, this application also provides a housing, including:

[0063] Two end plates 1 provided in this application are arranged opposite to each other;

[0064] The first side plate 2 is connected to the two end plates 1 respectively;

[0065] The second side plate 3 is disposed opposite to the first side plate 2 and is connected to the two end plates 1 respectively;

[0066] Cover plate 4 is connected to the first side plate 2, the second side plate 3 and the two end plates 1 respectively;

[0067] The base plate 5 is positioned opposite the cover plate 4 and is connected to the first side plate 2, the second side plate 3, and the two end plates 1 respectively.

[0068] In this embodiment, the housing can be configured to assemble battery cells. After one or more battery cells are assembled in the housing, a battery module can be formed. After multiple battery modules are assembled using positioning slots, a solid-state battery can be formed. The battery cells can be lithium metal solid-state cells with expansion, pouch cells, etc.

[0069] In some embodiments, as shown in FIG1 and FIG2, the inclined portion 200 includes a first inclined portion 210 and a second inclined portion 220. The first inclined portion 210 is provided with at least one first mounting hole 211, which is configured to fix the first inclined portion 210 to the cover plate 4. The second inclined portion 220 is provided with at least one second mounting hole 221, which is configured to fix the second inclined portion 220 to the base plate 5.

[0070] In this embodiment, the first inclined portion 210 and the second inclined portion 220 are disposed opposite to each other. The first inclined portion 210 can be disposed at the cover plate 4 of the housing, and the second inclined portion 220 can be disposed at the bottom plate 5 of the housing. At least one first mounting hole 211 can be provided on the first inclined portion 210, and at least one second mounting hole 221 can be provided on the second inclined portion 220. When assembling the battery module, bolts can be used to pass through the first mounting hole 211 to fix the first inclined portion 210 to the cover plate 4, and bolts can be used to pass through the second mounting hole 221 to fix the second inclined portion 220 to the bottom plate 5.

[0071] The number of the first mounting hole 211 and the second mounting hole 221 can be selected according to the actual application, and this application does not make a specific limitation.

[0072] In some embodiments, as shown in FIG1 and FIG2, the second inclined portion 220 is provided with a second groove 222, the opening of the second groove 222 extends to the end of the end plate body 10, and the second mounting hole 221 is provided at the second groove 222 of the second inclined portion 220; the first mounting hole 211 and the second mounting hole 221 have the same diameter.

[0073] Specifically, to avoid interference from the bolts inside the battery module, this application can provide a second groove 222 on the second inclined portion 220, and a second mounting hole 221 can be provided in the second groove 222, that is, the bolts can fix the second inclined portion 220 to the base plate 5 at the second groove 222. A threaded sleeve can be provided in the second groove 222.

[0074] It should be noted that the diameters of the first mounting hole 211 and the second mounting hole 221 may be the same or different, and can be selected according to the actual application. This application does not make any specific restrictions.

[0075] In some embodiments, as shown in Figures 1 and 2, the inclined portion 200 further includes a third inclined portion 230 and a fourth inclined portion 240, which are disposed opposite to each other; the third inclined portion 230 is provided with at least one third mounting hole 231, which is configured to fix the third inclined portion 230 to the first side plate 2; the fourth inclined portion 240 is provided with at least one fourth mounting hole 241, which is configured to fix the fourth inclined portion 240 to the second side plate 3.

[0076] In this embodiment, the third inclined portion 230 can be provided at the first side plate, and the fourth inclined portion 240 can be provided at the second side plate 3. At least one third mounting hole 231 can be provided on the third inclined portion 230, and at least one fourth mounting hole 241 can be provided on the fourth inclined portion 240.

[0077] Specifically, when assembling the battery module, bolts can be used to pass through the third mounting hole 231 to fix the third inclined part 230 to the first side plate 2, and bolts can be used to pass through the fourth mounting hole 241 to fix the fourth inclined part 240 to the second side plate 3.

[0078] The number of the third mounting hole 231 and the fourth mounting hole 241 can be selected according to the actual application, and this application does not make a specific limit.

[0079] In some embodiments, as shown in Figures 1 and 2, the solid-state battery includes multiple housings, a third inclined portion 230 is provided with at least one first positioning groove 232, the first positioning groove 232 is configured to connect two adjacent housings; a fourth inclined portion 240 is provided with at least one second positioning groove 242, the second positioning groove 242 is configured to connect two adjacent housings.

[0080] In this embodiment, at least one first positioning groove 232 may be provided on the third inclined portion 230, and at least one second positioning groove 242 may be provided on the fourth inclined portion 240. The first positioning groove 232 and the second positioning groove 242 can cooperate to fix two adjacent boxes together.

[0081] In some embodiments, as shown in Figures 1 and 2, the third inclined portion 230 is provided with a third groove 233, the opening of the third groove 233 extending to the end of the end plate body 10, and a third mounting hole 231 is provided at the third groove 233 of the third inclined portion 230; the fourth inclined portion 240 is provided with a fourth groove 243, the opening of the fourth groove 243 extending to the end of the end plate body 10, and a fourth mounting hole 241 is provided at the fourth groove 243 of the fourth inclined portion 240; the third mounting hole 231 and the fourth mounting hole 241 have the same diameter.

[0082] Specifically, to avoid interference from the bolts with the internal structure of the battery module, this application can provide a third groove 233 at the third inclined portion 230, and a third mounting hole 231 can be provided in the third groove 233 of the third inclined portion 230, that is, the bolts can be used to fix the third inclined portion 230 to the base plate 5 at the third groove 233. A threaded sleeve can be provided in the third groove 233.

[0083] Meanwhile, this application may also provide a fourth groove 243 at the fourth inclined portion 240, and a fourth mounting hole 241 may be provided in the fourth groove 243 of the fourth inclined portion 240, that is, the bolt can be used to fix the fourth inclined portion 240 to the base plate 5 at the fourth groove 243.

[0084] In some embodiments, as shown in FIG3, a reinforcing rib 300 is provided on the side of the end plate body 10 away from the battery cell; the reinforcing rib 300 is integrally formed with the end plate body 10 on the side of the end plate body 10 away from the battery cell.

[0085] Specifically, in order to ensure the strength of the end plate, this application can also provide a reinforcing rib 300 on the side of the end plate body 10 away from the battery cell. At the same time, the reinforcing rib 300 is integrally formed with the end plate body 10 on the side of the end plate body 10 away from the battery cell. This can reduce the weight of the end plate 1 without reducing its strength, and effectively improve the energy density of the battery module.

[0086] It should be noted that the shape and structure of the reinforcing rib 300 can be selected according to the actual application, such as E-shaped, cross-shaped, etc., and this application does not make specific limitations in this regard.

[0087] In some embodiments, as shown in FIG3, the reinforcing rib 300 includes a main body 310; the end plate body 10 includes four ends, namely a first end 11, a second end 12, a third end 13 and a fourth end 14; wherein, the main body 310 is connected to the first end 11 and the third end 13 respectively; the first end 11 and the third end 13 are two corresponding ends of the end plate body 10, and the second end 12 and the fourth end 14 are two corresponding ends of the end plate body 10.

[0088] In this embodiment, the two ends of the main body 310 can extend to the two corresponding ends of the end plate body 10 to achieve connection with the two ends corresponding to the end plate body 10, such as the first end 11 and the second end, and be integrally formed so that the reinforcing rib 300 can be directly embedded in the end plate body 10.

[0089] In some embodiments, as shown in FIG3, the reinforcing rib 300 further includes a first reinforcing part 301, a second reinforcing part 302, a third reinforcing part 303, a fourth reinforcing part 304, and a fifth reinforcing part 305 located on one side of the main body 310; wherein, one end of the first reinforcing part 301, one end of the second reinforcing part 302, one end of the third reinforcing part 303, one end of the fourth reinforcing part 304, and one end of the fifth reinforcing part 305 are all connected to the main body 310, and the other ends of the first reinforcing part 301, the second reinforcing part 302, the third reinforcing part 303, the fourth reinforcing part 304, and the fifth reinforcing part 305 are all connected to the second end portion 12.

[0090] In this embodiment, one side of the main body 310 may be extended to form a first reinforcing part 301, a second reinforcing part 302, a third reinforcing part 303, a fourth reinforcing part 304, and a fifth reinforcing part 305 of the reinforcing rib 300. The first reinforcing part 301, the second reinforcing part 302, the third reinforcing part 303, the fourth reinforcing part 304, and the fifth reinforcing part 305 may extend to the end of the end plate body 10, that is, the second end 12, and connect with the second end 12.

[0091] In some embodiments, as shown in FIG3, at least one first groove 312 is formed between the first reinforcing portion 301 and the second reinforcing portion 302, between the second reinforcing portion 302 and the third reinforcing portion 303, between the third reinforcing portion 303 and the fourth reinforcing portion 304, and between the fourth reinforcing portion 304 and the fifth reinforcing portion 305, and the opening of the first groove 312 extends to the end of the end plate body 10.

[0092] In this embodiment, a first groove 312 can be formed between the first reinforcing part 301 and the second reinforcing part 302, between the second reinforcing part 302 and the third reinforcing part 303, between the third reinforcing part 303 and the fourth reinforcing part 304, and between the fourth reinforcing part 304 and the fifth reinforcing part 305. The opening of the first groove 312 extends to the end of the end plate body 10 to connect with the second end, so as to reduce the weight of the end plate while ensuring the strength of the end plate 1, thereby effectively improving the energy density of the battery module.

[0093] The shapes of the first grooves 312 may be the same or different, and can be selected according to the actual application. This application does not make specific limitations.

[0094] In some embodiments, as shown in FIG3, the reinforcing rib 300 further includes a sixth reinforcing part 306, a seventh reinforcing part 307, an eighth reinforcing part 308, a ninth reinforcing part 309, and a tenth reinforcing part 311 located on the other side of the main body part 310; wherein, one end of the sixth reinforcing part 306, one end of the seventh reinforcing part 307, one end of the eighth reinforcing part 308, one end of the ninth reinforcing part 309, and one end of the tenth reinforcing part 311 are all connected to the main body part 310, and the other ends of the sixth reinforcing part 306, the seventh reinforcing part 307, the eighth reinforcing part 308, the ninth reinforcing part 309, and the tenth reinforcing part 311 are all connected to the fourth end portion 14.

[0095] Specifically, this application may also extend to the other side of the main body 310 to form a sixth reinforcing part 306, a seventh reinforcing part 307, an eighth reinforcing part 308, a ninth reinforcing part 309, and a tenth reinforcing part 311. The sixth reinforcing part 306, the seventh reinforcing part 307, the eighth reinforcing part 308, the ninth reinforcing part 309, and the tenth reinforcing part 311 may extend to the end of the end plate body 10, that is, the fourth end 14, and connect with the fourth end 14.

[0096] In some implementations, the first reinforcing part 301 and the sixth reinforcing part 306 are symmetrically arranged, the second reinforcing part 302 and the seventh reinforcing part 307 are symmetrically arranged, the third reinforcing part 303 and the eighth reinforcing part 308 are symmetrically arranged, the fourth reinforcing part 304 and the ninth reinforcing part 309 are symmetrically arranged, and the fifth reinforcing part 305 and the tenth reinforcing part 311 are symmetrically arranged.

[0097] In some embodiments, this application also provides a solid-state battery, including at least one battery module, the battery module including at least one cell and the housing provided in this application, the cell being assembled in the housing.

Claims

1. An end plate (1) for a solid-state battery, comprising an end plate body (10), the end plate body (10) comprising at least one end, the end plate body (10) having a flat portion (100) and one or more inclined portions (200) on the side near the battery cell; in, One end of the inclined portion (200) is connected to the flat portion (100), and the other end of the inclined portion (200) is connected to the end plate to form a frustum-shaped end plate (1).

2. The end plate (1) of the solid-state battery according to claim 1, wherein, The end plate body includes four ends, namely the first end (11), the second end (12), the third end (13) and the fourth end (14), and the inclined portion (200) includes the first inclined portion (210), the second inclined portion (220), the third inclined portion (230) and the fourth inclined portion (240); One end of the first inclined portion (210), one end of the second inclined portion (220), one end of the third inclined portion (230), and one end of the fourth inclined portion (240) are respectively connected to the first end portion (11), the second end portion (12), the third end portion (13), and the fourth end portion (14). The other ends of the first inclined portion (210), the second inclined portion (220), the third inclined portion (230), and the fourth inclined portion (240) are all connected to the flat portion (100) to form the end plate (1) of the frustum structure.

3. The end plate (1) of the solid-state battery according to claim 2, wherein, The planar portion (100), the first inclined portion (210), the second inclined portion (220), the third inclined portion (230), and the fourth inclined portion (240) are integrally formed.

4. The end plate (1) of the solid-state battery according to any one of claims 1-3, wherein, The end plate body (10) is provided with a reinforcing rib (300) on the side away from the battery cell; the reinforcing rib (300) is integrally formed with the end plate body (10) on the side away from the battery cell.

5. The end plate (1) of the solid-state battery according to claim 4, wherein, The reinforcing rib (300) includes a main body (310); the end plate body (10) includes four ends, namely a first end (11), a second end (12), a third end (13) and a fourth end (14); The main body (310) is connected to the first end (11) and the third end (13) respectively; the first end (11) and the third end (13) are two ends corresponding to the end plate body (10), and the second end (12) and the fourth end (14) are two ends corresponding to the end plate body (10).

6. The end plate (1) of the solid-state battery according to claim 5, wherein, The reinforcing rib (300) further includes a first reinforcing part (301), a second reinforcing part (302), a third reinforcing part (303), a fourth reinforcing part (304), and a fifth reinforcing part (305) located on one side of the main body (310); One end of the first reinforcing part (301), one end of the second reinforcing part (302), one end of the third reinforcing part (303), one end of the fourth reinforcing part (304), and one end of the fifth reinforcing part (305) are all connected to the main body part (310), and the other end of the first reinforcing part (301), the other end of the second reinforcing part (302), the other end of the third reinforcing part (303), the other end of the fourth reinforcing part (304), and the other end of the fifth reinforcing part (305) are all connected to the second end part (12).

7. The end plate (1) of the solid-state battery according to claim 6, wherein, At least one first groove (312) is formed between the first reinforcing part (301) and the second reinforcing part (302), between the second reinforcing part (302) and the third reinforcing part (303), between the third reinforcing part (303) and the fourth reinforcing part (304), and between the fourth reinforcing part (304) and the fifth reinforcing part (305), and the opening of the first groove (312) extends to the second end (12).

8. The end plate (1) of the solid-state battery according to claim 6, wherein, The reinforcing rib (300) also includes a sixth reinforcing part (306), a seventh reinforcing part (307), an eighth reinforcing part (308), a ninth reinforcing part (309) and a tenth reinforcing part (311) located on the other side of the main body (310); One end of the sixth reinforcing part (306), one end of the seventh reinforcing part (307), one end of the eighth reinforcing part (308), one end of the ninth reinforcing part (309), and one end of the tenth reinforcing part (311) are all connected to the main body part (310), and the other end of the sixth reinforcing part (306), the seventh reinforcing part (307), the eighth reinforcing part (308), the ninth reinforcing part (309), and the tenth reinforcing part (311) are all connected to the fourth end part (14).

9. The end plate (1) of the solid-state battery according to claim 8, wherein, The first reinforcing part (301) is symmetrically arranged with the sixth reinforcing part (306), the second reinforcing part (302) is symmetrically arranged with the seventh reinforcing part (307), the third reinforcing part (303) is symmetrically arranged with the eighth reinforcing part (308), the fourth reinforcing part (304) is symmetrically arranged with the ninth reinforcing part (309), and the fifth reinforcing part (305) is symmetrically arranged with the tenth reinforcing part (311).

10. A housing, comprising: The two end plates (1) according to any one of claims 1-9 are arranged opposite to each other; The first side plate (2) is connected to the two end plates (1) respectively; The second side plate (3) is disposed opposite to the first side plate (2) and is connected to the two end plates (1) respectively; The cover plate (4) is connected to the first side plate (2), the second side plate (3) and the two end plates (1) respectively; The bottom plate (5) is disposed opposite to the cover plate (4) and is connected to the first side plate (2), the second side plate (3) and the two end plates (1) respectively.

11. The housing according to claim 10, wherein, The inclined portion (200) includes a first inclined portion (210); the first inclined portion (210) is provided with at least one first mounting hole (211), the first mounting hole (211) being configured to connect the first inclined portion (210) to the cover plate (4); or / and, The inclined portion (200) includes a second inclined portion (220); the second inclined portion (220) is provided with at least one second mounting hole (221), the second mounting hole (221) being configured to achieve a fixed connection between the second inclined portion (220) and the base plate (5).

12. The housing according to claim 11, wherein, The second inclined portion (220) is provided with a second groove (222), the opening of which extends to the end of the end plate body (10), and the second mounting hole (221) is provided within the second groove (222); or / and, The first mounting hole (211) and the second mounting hole (221) have the same diameter.

13. The housing according to claim 10, wherein, The inclined portion (200) includes a third inclined portion (230); the third inclined portion (230) is provided with at least one third mounting hole (231), the third mounting hole (231) being configured to connect the third inclined portion (230) to the first side plate (2); or / and, The inclined portion (200) includes a fourth inclined portion (240); the fourth inclined portion (240) is provided with at least one fourth mounting hole (241), the fourth mounting hole (241) being configured to connect the fourth inclined portion (240) to the second side plate (3).

14. The housing according to claim 13, wherein, The solid-state battery includes multiple of the aforementioned housings; The third inclined portion (230) is provided with at least one first positioning groove (232), the first positioning groove (232) being configured to connect two adjacent housings; or / and, The fourth inclined portion (240) is provided with at least one second positioning groove (242), which is configured to realize the connection between the two adjacent boxes.

15. The housing according to claim 13, wherein, The third inclined portion (230) is provided with a third groove (233), the opening of which extends to the end of the end plate body (10), and the third mounting hole (231) is provided in the third groove (233); or / and, The fourth inclined portion (240) is provided with a fourth groove (243), the opening of which extends to the end of the end plate body (10), and the fourth mounting hole (241) is provided in the fourth groove (243); or / and, The third mounting hole (231) and the fourth mounting hole (241) have the same diameter.

16. A solid-state battery, comprising at least one battery module, the battery module comprising at least one battery cell and a housing according to any one of claims 10-15, the battery cell being assembled in the housing.

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