BATTERY BOX AND BATTERY PACK

Abstract

Provided are a battery housing (120) and a battery pack (100). The battery housing (120) comprises a connecting structure (121) and two end plate assemblies (122), and the two end plate assemblies (122) each comprise an end plate (1221); at least one end plate assembly (1221) comprises a limiting member (1226), and the limiting member (1226) comprises a mounting portion (1227) and a limiting portion (1234) connected to each other; the end plate (1221) works in conjunction with the mounting portion (1227) to limit the limiting member (1226) to move in a direction moving away from the connecting structure (121); and the limiting portion (1234) abuts against at least one of a battery cell (110), a cells contact system support or a busbar so as to limit the battery cell (110) to move in a direction moving away from the connecting structure (121).

Description

1 / 21 BATTERY BOX AND BATTERY PACK CROSS-REFERENCE TO RELATED REQUEST

[0001] This application claims priority to Chinese Patent Application No. 202321384636.1 filed with the National Intellectual Property Administration of China on May 31, 2023, the disclosures of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] This application relates to the field of screen technology and, specifically, to a battery box and a battery pack. TECHNICAL BACKGROUND

[0003] In the state of the art related to batteries, the CTP (cell-to-pack) design is a highly integrated battery system arrangement method, with a high volume ratio, high energy density, and low cost. The battery cell in the CTP-designed battery pack needs to be limited in one direction of height to prevent the battery cell from being displaced in the height direction, which will cause the structures in the battery pack to interfere with each other, resulting in structural failure, short-circuiting of the battery cell, and even causing fire and explosion.

[0004] In the related state of the art, a separate limiting structure can be provided above the battery cell, and the movement of the battery cell in the direction of height is limited by means of the limiting structure. SUMMARY

[0005] However, the structure of the limiting frame is relatively complex and many parts are added, which will result in an increase in the cost of the battery pack.

[0006] The present invention provides a battery box. The battery box includes a connecting structure and two sets of end plates. The two sets of end plates Petition 870250080403, dated 08 / 09 / 2025, page 53 / 102 2 / 21 each includes an end plate. The two end plates are connected to two ends of the connecting frame and arranged at opposite intervals. The two end plates and the connecting frame are closed to form an installation space configured to install a battery cell.

[0007] Wherein, at least one of the end plate assemblies further includes a limiting member, the limiting member includes a mounting portion and a limiting portion which are connected to each other, and the mounting portion is provided on one side of the end plate facing the installation space, the end plate engages with the mounting portion to limit the movement of the limiting member in a direction away from the connecting structure; the limiting portion is configured to abut at least one of the battery cells, a Cell Contact System support or a conductive bar so as to limit the movement of the battery cell in a direction away from the connecting structure.

[0008] The present application also provides a battery pack. The battery pack includes a battery cell and a battery case, as described above. The battery case includes a connecting frame and two sets of end plates. The two sets of end plates each include an end plate. The two end plates are connected to the two ends of the connecting frame and are arranged at opposite intervals, and the two end plates and the connecting frame are closed to form an installation space configured to install a battery cell, and the battery cell is provided in the installation space of the battery case; wherein, at least one of the sets of end plates further includes a limiting member, the limiting member includes a mounting portion and a limiting portion that are connected to each other, the mounting portion is provided on one side Petition 870250080403, dated 08 / 09 / 2025, page 54 / 102 With 3 / 21 of the end plate facing the installation space, the end plate engages with the mounting portion to limit movement of the limiting member in one direction away from the connecting structure; the limiting portion is configured to abut at least one of the battery cells, the Cell Contact System support, or the conductor bar to limit movement of the battery cell in one direction away from the connecting structure.

[0009] In the battery box provided by the present application, the mounting portion of the end plate assembly is connected to the side of the end plate facing the installation space, the end plate fits into the mounting portion to limit the movement of the limiting member in the direction opposite to the connecting structure, and the limiting portion of the limiting member is positioned to abut at least one of the battery cells, the Cell Contact System support, or the conductor bar to directly or indirectly limit the movement of the battery cell in a direction opposite to the connecting structure. Due to the frictional force between the battery cell and the other battery cell, the movement of the battery cell relative to the other battery cell can be restricted in a direction opposite to the connecting structure.Therefore, by directly or indirectly limiting one of the battery cells from moving in a direction opposite to the connecting structure through the limiting portion of the limiting member, the plurality of battery cells can be effectively restricted from moving in a direction opposite to the connecting structure, so that, although the limiting member structure is relatively simple and of lower cost, the plurality of battery cells can also be effectively restricted from moving in a direction opposite to the connecting structure.

[0010] The battery pack provided by this application adopts the battery case mentioned above, and the limiting portion Petition 870250080403, dated 08 / 09 / 2025, page 55 / 102 4 / 21 of the battery box is configured to make contact with at least one of the battery cells, the Cell Contact System support, or the conductor bar, so as to limit the movement of the battery cell in the opposite direction to the connecting structure. In this way, it is possible to effectively restrict the movement of multiple battery cells along a direction opposite to the connecting structure, so that, while making the limiting member structure relatively simple and less expensive, the multiple battery cells can also be effectively prevented from moving in the opposite direction to the connecting structure. Thus, it is possible to make the battery pack structure simpler and effectively reduce the cost of the battery pack. DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a structural representation of some implementations of the battery pack provided by this application; Figure 2 is a schematic diagram of the fitting structure of some implementations of the battery and the limiting member provided by this application; Figure 3 is a structural representation of some implementations of the limiting member provided by this application; Figure 4 is another angled view of the limiting member provided by this application; Figure 5 is a structural representation of some implementations of the endplate provided by this application; Figure 6 is a structural representation of some implementations of the endplate assembly provided by this application; Figure 7 is another angled view of the end plate assembly provided by the present application. Petition 870250080403, dated 08 / 09 / 2025, page 56 / 102 5 / 21

[0012] Explanation of reference symbols: Battery pack 100; Battery cell 110; Cell pole 111; Cell body 112; Cell top cover 113; Battery case 120; Installation space 1200; Connection structure 121; End plate assembly 122; End plate 1221; First surface 1222; Limiting groove 1223; Through hole 1224; Reinforcing rib 1225; Limiting member 1226; Mounting portion 1227; Second surface 1228; Limiting protrusion 1229; Connection end 1230; Confining end 1231; Confining portion 1232; Confining surface 1233; Limiting portion 1234; First direction X. DESCRIPTION OF THE MODALITIES

[0013] In the description of the present application, unless explicitly specified and limited otherwise, the terms interconnection, connection and fixed shall be understood in a broad sense. For example, it may be a fixed connection, or a detachable connection, or it may be integrally formed; it may be a mechanical connection or an electrical connection; it may be a direct or indirect connection through an intermediate medium; it may be an internal connection between two elements or an interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present application may be understood based on specific circumstances.

[0014] In the present application, unless explicitly specified and limited otherwise, a first feature being above or below a second feature may include direct contact between the first and second features, or may include indirect contact between the first and second features by means of the additional feature between them. Furthermore, the first feature being above, on top of, and over the second feature includes the first feature being directly above and diagonally above the second. Petition 870250080403, dated 08 / 09 / 2025, page 57 / 102 6 / 21 characteristic, and the first characteristic has a greater horizontal height than the second characteristic. The first characteristic being below, underneath, and beneath the second characteristic includes the first characteristic being directly below and diagonally below the second characteristic, and the first characteristic has a lesser horizontal height than the second characteristic.

[0015] In the description of the present embodiment, the oriental or positional relationships, such as the terms superior, inferior, left, right, front and back, are based on the orientations or positional relationships illustrated in the drawings. The terms are intended to facilitate and simplify the description of the present disclosure, rather than indicating or implying that the devices or elements mentioned herein must have specific orientations or be constructed or operated in those specific orientations. Consequently, the terms should not be interpreted as limiting the present application. Furthermore, the terms first and second are used to differentiate in the description and have no special meaning.

[0016] This application provides a battery box and a battery pack.

[0017] Figure 1 is a structural representation of some implementations of the battery pack provided by the present application. Figure 2 is a schematic diagram of the interlocking structure of some implementations of the battery and the limiting member provided by the present application. As shown in Figures 1 and 2, the battery pack 100 includes a battery cell 110 and a battery box 120. The battery box 120 has an installation space 1200, and the battery cell 110 is provided in the installation space 1200 of the battery box 120. The battery pack 100 includes a plurality of battery cells 110, and the plurality of battery cells 110 are installed sequentially in the installation space 1200 of the box. Petition 870250080403, dated 08 / 09 / 2025, page 58 / 102 7 / 21 of battery 120. The battery box 120 is configured to directly or indirectly limit the position of the battery cell 110, so as to restrict the movement distance of the battery cell 110 within the installation space 1200.

[0018] As shown in Figure 1, the battery case 120 includes a connecting frame 121 and two sets of end plates 122. The two sets of end plates 122 each include an end plate 1221. The two end plates 1221 are connected to both ends of the connecting frame 121 and are arranged opposite each other at intervals. The two end plates 1221 and the connecting frame 121 are closed to form the installation space 1200 configured to install the battery cell 110. The plurality of battery cells 110 of the battery pack 100 are arranged sequentially in the installation space 1200 along the distribution direction of the two end plates 1221.The two sets of end plates 122 can directly or indirectly touch the battery cells 110 at both ends of the plurality of battery cells 110 along the arrangement direction, respectively, thus exerting a compressive force on the plurality of battery cells 110 and increasing the frictional force of the two adjacent battery cells 110 to reduce the risk of movement of the battery cell 110 in the installation space 1200.

[0019] Among others, as shown in figures 1, 6 and 7, at least one set of end plates 122 further includes a limiting member 1226, which includes a mounting portion 1227 and a limiting portion 1234 connected to each other. The mounting portion 1227 of the limiting member 1226 is provided on one side of the end plate 1221 facing the installation space 1200. The end plate 1221 fits into the mounting portion 1227 of the limiting member 1226 to limit the movement of the limiting member 1226 away from the connecting structure 121. Petition 870250080403, dated 08 / 09 / 2025, page 59 / 102 8 / 21 After the plurality of battery cells 110 are installed in the installation space 1200, the mounting portion 1227 of the limiting member 1226 of the end plate assembly 122 is fixed between the end plate 1221 and the battery cell 110. The end plate 1221 exerts a compressive force on the battery cell 110 by means of the mounting portion 1227.

[0020] The limiting portion 1234 of the limiting member 1226 is configured to abut at least one of the battery cells 110, a Cell Contact System (CCS) support (not shown in the Figure) or a conductive bar (not shown in the Figure) to restrict the movement of battery cell 110 in a direction away from the connecting structure 121. The limiting member 1226 can limit the movement of battery cell 110 abutting the mounting portion 1227 in the direction away from the connecting structure 121 by means of the limiting portion 1234, and the frictional force between battery cell 110 and the other battery cell 110 can limit the movement of battery cell 110 relative to the other battery cell 110 in a direction away from the connecting structure 121.

[0021] In the battery box 120 supplied by the present application, the mounting portion 1227 of the end plate assembly 122 is disposed on the side of the end plate 1221 facing the installation space 1200, such that the end plate 1221 engages with the mounting portion 1227 of the limiting member 1226 to limit the movement of the limiting member 1226 in the direction away from the connecting structure 121, and to limit the movement of the battery cell 110 in the direction away from the connecting structure 121 by causing the limiting portion 1234 of the limiting member 1226 to abut the battery cell 110; alternatively, the limiting portion 1234 of the limiting member 1226 is placed in contact with at least one of the supports of the Cell Contact System or with the conductive bar to limit the movement of the support of the System. Petition 870250080403, dated 08 / 09 / 2025, pages 60 / 102 9 / 21 Contact between cells or the conductive bar in a direction away from the connecting structure 121, indirectly limiting the movement of battery cell 110 in a direction away from the connecting structure 121. Since the frictional force between battery cell 110 and another battery cell 110 can limit the movement of battery cell 110 relative to another battery cell 110 in the opposite direction to the connecting structure 121, one of the battery cells 110 is prevented from moving in the opposite direction to the connecting structure 121 by the limiting portion 1234 of the limiting member 1226, so that it can effectively restrict the movement of the plurality of cells 110 in the opposite direction to the connecting structure 121, thus effectively restricting the movement of the plurality of battery cells 110 in the opposite direction to the connecting structure 121, while at the same time making the structure of the limiting member 1226 relatively simple, lighter and... lowest cost.

[0022] In some possible implementations, battery cell 110 includes a cell body 112, a cell top cover 113, and a cell pole 111. The cell top cover 113 is provided on one side of the cell body 112, away from the connection structure 121. The cell pole 111 is connected to the side of the cell body 112, away from the connection structure 121. The conductor bar is configured to connect a plurality of battery cells 110 in series. The Cell Contact System support is the support carrier for components such as the conductor bar, a wiring harness, and a battery management system of the battery pack 100. That is, when assembling the battery pack 100, the conductor bar, the wiring harness, the battery management system, etc., need to be arranged on the CCS support.

[0023] When the limiting portion 1234 touches the battery cell 110, the limiting portion 1234 may be caused to touch at least one of the following: the top cover of the cell. Petition 870250080403, dated 08 / 09 / 2025, pages 61 / 102 10 / 21 battery 113, the battery pole post 111, the aluminum housing etc. of the battery cell 110. Specifically, depending on the structure and position of the limiting portion 1234, it only needs to be able to directly or indirectly limit the movement of the battery cell 110 along the direction in which the limiting portion 1226 is away from the connecting structure 121.

[0024] In some possible implementations, as shown in Figures 3, 5, and 7, one of the mounting portions 1227 and the end plate 1221 of the end plate assembly 122 are provided with a limiting groove 1223, and the other mounting portion 1227 and the end plate 1221 of the end plate assembly 122 are provided with a limiting protrusion 1229. The limiting protrusion 1229 is fitted into the limiting groove 1223 to limit the movement of the limiting member 1226 in the direction opposite to the connecting structure 121. By fitting the limiting protrusion 1229 into the limiting groove 1223, the limiting member 1226 can be effectively prevented from moving in the direction opposite to the connecting structure 121. Furthermore, the structures of the limiting protrusion 1229 and the limiting groove 1223 are relatively simple, so the production and processing costs of end plate 1221 and limiting member 1226 can be reduced.

[0025] It should be noted that the limiting groove 1223 can be provided in the mounting portion 1227 and the limiting protrusion 1229 can be provided in the end plate 1221. Alternatively, the limiting protrusion 1229 can be provided in the mounting portion 1227 and the limiting groove 1223 can be provided in the end plate 1221. Furthermore, both the limiting protrusion 1229 and the limiting groove 1223 can also be provided in the mounting portion 1227, and the limiting protrusion 1229 and the limiting groove 1223 can be provided in the end plate 1221, in which the protrusion Petition 870250080403, dated 08 / 09 / 2025, pages 62 / 102 11 / 21 limiting protrusion 1229 on end plate 1221 is connected to limiting groove 1223 of mounting portion 1227 and limiting protrusion 1229 of mounting portion 1227 is fitted into limiting groove 1223 of end plate 1221.

[0026] As shown in figures 3 to 5, the end plate 1221 has a first surface 1222 on one side facing the installation space 1200, and the mounting portion 1227 has a second surface 1228 on one side facing away from the installation space 1200. In some possible implementations, the first surface 1222 of the end plate 1221 is provided with the limiting groove 1223, and the second surface 1228 of the mounting portion 1227 protrudes with the limiting protrusion 1229. Thus, the thickness of the mounting portion 1227 in the distribution direction of the two end plates 1221 can be defined as thinner, thereby reducing the length of the battery box 120 in the distribution direction of the two end plates 1221.

[0027] Naturally, the limiting protrusion 1229 may also protrude on the first surface 1222 of the end plate 1221, and the limiting groove 1223 may be provided on the second surface 1228 of the mounting portion 1227. Between them, in the direction of distribution of the two end plates 1221, the length of the limiting protrusion 1229 may be less than the thickness of the mounting portion 1227, or the length of the limiting protrusion 1229 may be less than the depth of the limiting groove 1223 to prevent the limiting protrusion 1229 on the end plate 1221 from passing through the mounting portion 1227 and coming into contact with the battery cell 110 and thus damaging the battery cell 110.

[0028] As shown in Figure 4, the limiting projection 1229 includes a confining portion 1232. One end of the confining portion 1232 is a connecting end 1230, and the other end of the confining portion 1232 is an end Petition 870250080403, dated 08 / 09 / 2025, pages 63 / 102 12 / 21 confining portion 1231. The connecting end 1230 is connected to the end plate 1221 or connected to the mounting portion 1227. Among others, when the limiting protrusion 1229 is provided on the mounting portion 1227, the connecting end 1230 of the confining portion 1232 is connected to the mounting portion 1227; when the limiting protrusion 1229 is provided on the end plate 1221, the connecting end 1230 of the confining portion 1232 is connected to the end plate 1221.

[0029] In some possible implementations, as shown in Figure 4, in the direction from the connecting end 1230 of the confining portion 1232 to the confining end 1231, the confining portion 1232 is bent into a hook-shaped structure along the direction in which the limiting member 1226 is away from the connecting structure 121. When the limiting protrusion 1229 is fitted into the corresponding limiting groove 1223, as shown in Figure 7, the confining portion 1232 is located in the limiting groove 1223, and the confining end 1231 rests against an inner surface on one side of the limiting groove 1223 along the direction in which the connecting structure 121 moves away from the connecting structure 121, thus improving the stability of the confining end 1231 and the inner surface of the limiting groove 1223 and, in turn, improving the effect end plate limiter 1221 on the limiting member 1226.

[0030] Among other things, the limiting protrusion 1229 may protrude onto the first surface 1222 of the end plate 1221 or onto the second surface 1228 of the mounting portion 1227, the limiting groove 1223 is correspondingly provided on the second surface 1228 of the mounting portion 1227 or on the first surface 1222 of the end plate 1221. Furthermore, the connecting end 1230 of the confining portion 1232 may be connected directly to the end plate 1221 or to the mounting portion 1227, or the connecting end 1230 Petition 870250080403, dated 08 / 09 / 2025, pages 64 / 102 13 / 21 of the confining portion 1232 can also be connected indirectly to the end plate 1221 or to the mounting portion 1227 by means of other parts of the limiting projection 1229.

[0031] In some possible implementations, as shown in Figure 3, the limiting protrusion 1229 extends along the first X direction on the first surface 1222 of the end plate 1221 or on the second surface 1228 of the mounting portion 1227, wherein the first X direction is perpendicular to the direction of the limiting member 1226 away from the connecting structure 121, and the first X direction is parallel to the first surface 1222 or the second surface 1228. As such, the length of the limiting protrusion 1229 in the first X direction can be increased, and when the limiting protrusion 1229 is fitted into the limiting groove 1233, the limiting protrusion 1229 can rest more stably on the inner surface of the limiting groove 1223.

[0032] It should be noted that when the limiting protrusion 1229 is arranged on the first surface 1222, the first X direction is parallel to the first surface 1222; when the limiting protrusion 1229 is arranged on the second surface 1228, the first X direction is parallel to the second surface 1228.

[0033] In other possible implementations, the number of limiting protrusions 1229 may also be plural, and the plurality of limiting protrusions 1229 are sequentially spaced in the first X direction on the first surface 1222 of the end plate 1221 or on the second surface 1228 of the mounting portion 1227.

[0034] Among others, the limiting groove number 1223 can also be plural, and the plurality of limiting grooves 1229 are fitted into the plurality of limiting grooves 1223 in one-to-one correspondence. That is, the plurality of limiting grooves 1223 are spaced sequentially along the first direction and the plurality of Petition 870250080403, dated 08 / 09 / 2025, pages 65 / 102 14 / 21 limiting grooves 1223 correspond to the plurality of limiting protrusions 1229, one by one.

[0035] Alternatively, the plurality of limiting protrusions 1229 can also be fitted into the same limiting groove 1223. Specifically, the limiting groove 1223 is a strip-shaped groove extending along the first direction, the plurality of limiting protrusions 1229 are fitted into the strip-shaped limiting grooves and abut the inner surface of the limiting groove 1223.

[0036] Naturally, the number of limiting protrusions 1229 can also be plural, and the plurality of limiting protrusions 1229 are sequentially distributed along the first X direction, and each limiting protrusion 1229 extends along the first X direction to further improve the support stability between the limiting protrusion 1229 and the inner surface of the limiting groove 1223.

[0037] Furthermore, the limiting protrusion 1229 can also be a columnar protrusion. Its cross-sectional shape perpendicular to the direction of the protrusion can be circular, square, elliptical, triangular, etc. Correspondingly, the limiting groove 1223 can be a cylindrical groove. Its cross-sectional shape perpendicular to the depth square can be circular, square, elliptical, triangular, etc.

[0038] As shown in Figures 4, 6 and 7, the mounting portion 1227 has a confining surface 1233 on one side facing the installation space 1200. The confining surface 1233 is configured to abut at least one of the battery cells 110, the Cell Contact System support or the conductor bar. When the mounting portion 1227 is provided on the side of the end plate 1221 facing the installation space 1200 and the various battery cells 110 are installed in the installation space 1200, the first Petition 870250080403, dated 08 / 09 / 2025, pages 66 / 102 15 / 21 surface 1222 of end plate 1221 abuts the second surface 1228 of mounting portion 1227 and the confining surface 1233 of mounting portion 1227 abuts the battery cell 110 in the installation space 1200.

[0039] Among them, battery cell 110 and limiting member 1226 can be installed in the installation space 1200 in a pre-tensioned manner. Specifically, the confining surface 1233 of the mounting portion 1227 of the limiting member 1226 is abutted against the outermost battery cell 110, and the confining surface 1233 of the mounting portion 1227 and the battery cell 110 can be joined by glue or double-sided tape, and then the mounting portion 1227 and the plurality of battery cells 110 are clamped using tools and inserted into the installation space 1200. Currently, the limiting protrusion 1229 is arranged opposite the limiting groove 1223, and the plurality of battery cells 110 is formed in a compressed state. When the tool is removed, the plurality of battery cells 110 will bounce to a certain extent, pushing the limiting protrusion 1229 to be fitted into the limiting groove 1223.

[0040] Alternatively, battery cell 110 and limiting member 1226 can also be installed in installation space 1200 using a zero pre-tensioning method. That is, battery cell 110 and limiting member 1226 are installed, respectively, in installation space 1200 in a predetermined order.

[0041] The limiting portion 1234 of the limiting member 1226 projects from the confining surface 1233, such that the limiting portion 1234 extends towards the installation space 1200 and touches at least one of the battery cells 110, the Cell Contact System support or the conductor bar. The limiting portion 1234 is located at one end of the confining surface 1233, away from the structure. Petition 870250080403, dated 08 / 09 / 2025, pages 67 / 102 16 / 21 of connection 121, so that the limiting portion 1234 can touch the side of at least one of the battery cells 110, of the Cell Contact System support or of the conductor bar, moving away from the connection structure 121, so as to directly or indirectly restrict the movement of the battery cell 110 along the direction in which the limiting member 1226 moves away from the connection structure 121.

[0042] In some possible implementations, as shown in figures 3 and 4, the limiting portion 1234 extends along the edge at one end of the confining surface 1233, moving away from the connecting structure 121. Thus, the length of the limiting portion 1234 can be increased, thereby increasing the confining area between the limiting portion 1234 and the battery cell 110 to improve the limiting effect on the battery cell 110.

[0043] Alternatively, the number of limiting portions 1234 can also be plural, and the plurality of limiting portions 1234 can be distributed at intervals sequentially along the edge at one end of the confining surface 1233, away from the connecting structure 121, thus increasing the confining area between the limiting portion 1234 and the battery cell 110 to improve the limiting effect on the battery cell 110.

[0044] Naturally, the number of limiting portions 1234 can also be plural. The plurality of limiting portions 1234 is sequentially distributed at intervals along the edge at one end of the confining surface 1233, away from the connecting structure 121. Furthermore, each limiting portion 1234 extends along the edge at one end of the confining surface 1233, away from the connecting structure 121, to further enhance the limiting effect on the battery cell 110.

[0045] In some possible implementations, at least one of the limiting portion 1234 and the limiting protrusion 1229 of Petition 870250080403, dated 08 / 09 / 2025, pages 68 / 102 17 / 21 limiting member 1226 is integrally formed with mounting portion 1227, thereby improving the structural strength of limiting member 1226 and, in turn, improving the limiting effect of limiting portion 1234 of limiting member 1226 on battery cell 110.

[0046] Among others, both the limiting portion 1234 and the limiting projection 1229 can be formed integrally with the mounting portion 1227, or only one of the limiting portions 1234 and the limiting projection 1229 can be formed integrally with the mounting portion 1227. Naturally, the former can further improve the structural strength of the limiting member 1226.

[0047] In other possible implementations, at least one of the limiting portions 1234 and the limiting protrusion 1229 of the limiting member 1226 is provided separately from the mounting portion 1227, thus improving the processing accuracy of each component of the limiting member 1226 and, in turn, improving the structural accuracy of the limiting portion 1234. Among others, both the limiting portion 1234 and the limiting protrusion 1229 may be provided separately from the mounting portion 1227, or only one of the limiting portions 1234 and the limiting protrusion 1229 may be provided separately from the mounting portion 1227. Obviously, the former can further improve the structural accuracy of the limiting member 1226. The limiting portion 1234 and / or the limiting protrusion 1229 may be connected to the mounting portion 1227 by means of a screw, fastener, membership, etc.

[0048] In some possible implementations, as shown in Figure 6, the mounting portion 1227 is arranged in plate form. The mounting portion 1227 has a confining surface 1233 on one side facing the installation space 1200. The confining surface 1233 is configured to abut the side surface of the battery cell in the space of Petition 870250080403, dated 08 / 09 / 2025, pages 69 / 102 18 / 21 installation 1200. By arranging the mounting portion 1227 of the limiting member 1226 in plate form, the contact area between the confining surface 1233 of the mounting portion 1227 and the battery cell 110 can be increased, thus making the distribution of the acting force between the mounting portion 1227 and the battery cell 110 more uniform to further improve the limiting effect on the battery cell 110. In addition, the mounting portion 1227 has a larger area, which can provide better effects such as insulation, heat preservation and prevention of foreign bodies from puncturing the battery cell.

[0049] The material of the mounting portion 1227 of the limiting member 1226 may be a plastic, such as polyurethane foam or MPP, so that the limiting portion 1234 may achieve better insulation and heat preservation effects. Obviously, the material of the mounting portion 1227 of the limiting member 1226 may also be metallic to improve the structural strength of the mounting portion 1227. The material of the limiting protrusion 1229 and the limiting portion 1234 of the limiting member 1226 may be the same as the material of the mounting portion 1227, or it may be different from the material of the mounting portion 1227, which may be specifically determined depending on the actual use scenario of the limiting portion 1226.

[0050] Specifically, as shown in figures 3 to 7, the mounting portion 1227 is provided in plate form. The second surface 1228 of the mounting portion 1227 is rectangular. The second surface 1228 of the mounting portion 1227 extends in the first X direction along both lateral edges of the limiting member 1226 in the direction opposite to the connecting structure 121. The direction of extension of the two lateral edges of the second surface 1228 of the mounting portion 1227 along the first X direction is perpendicular to the first X direction.

[0051] Among others, a plurality of limiting protrusions 1229 stand out from the second surface Petition 870250080403, dated 08 / 09 / 2025, pages 70 / 102 19 / 21 1228 of the mounting portion 1227. The plurality of limiting projections 1229 are sequentially distributed along the first X direction, and each limiting projection 1229 extends along the first X direction. Each limiting projection 1229 includes a confining portion 1232. The end plate 1221 is provided with a plurality of through holes 1224 that penetrate through the end plate 1221 along the first direction, the plurality of through holes 1224 are sequentially distributed along the direction of the limiting member 1226 away from the connecting structure 121, the two adjacent through holes are separated by a reinforcing rib 1225. A plurality of limiting slots 1223 is provided on the first surface 1222 of the end plate 1221, facing the limiting space, and the slots Limiters 1223 extend to through holes 1224.The number of limiting protrusions 1229 is equal to the number of limiting grooves 1223, and the limiting protrusion 1229 is fitted into the limiting groove 1223 in a one-to-one correspondence. The limiting protrusion 1229 rests against the reinforcing rib 1225 on the side of the limiting groove 1223 along the direction of the limiting member 1226 away from the connecting structure 121.

[0052] The limiting portion 1234 of the limiting member 1226 is arranged in a plate-like form. The limiting portion 1234 forms an angle of intersection with the confining surface 1233 of the mounting portion 1227. In some possible implementations, the angle of intersection formed by the limiting portion 1234 and the confining surface 1233 of the mounting portion 1227 is a right or acute angle, so that the limiting portion 1234 can more stably abut the battery cell 110. Among others, the limiting portion 1234 extends from an edge of the confining surface 1233 away from the connecting structure 121 to exhibit a strip-like plate structure. Furthermore, the Petition 870250080403, dated 08 / 09 / 2025, pages 71 / 102 20 / 21 limiting portion 1234 is located in the middle of the edge, at one end of the confining surface 1233 away from the connecting structure 121.

[0053] In other possible implementations, the end plate 1221 has a first surface 1222 on one side facing the installation space 1200, and the mounting portion 1227 includes an annular frame (not shown in the figure) arranged along the circumferential direction of the first surface 1222. The annular frame is connected to the end plate 1221, and the limiting portion 1234 is connected to the annular frame. After the annular frame is connected to the end plate 1221, the annular frame can be prevented from moving along a direction in which the limiting member 1226 is away from the connecting structure 121. An isolation space is provided between the battery cell 110 and the end plate 1221 in the annular frame to improve the thermal insulation effect between the battery cell 110 and the end plate 1221.

[0054] Among others, a limiting protrusion 1229 or a limiting groove 1223 may be provided in the annular frame, so that, after the annular frame is connected to the end plate 1221, the annular frame may be prevented from moving along the direction in which the limiting member 1226 is away from the connecting structure 121.

[0055] In some possible implementations, as shown in Figure 1, two sets of end plates 122 can be made to each include the limiting member 1226, further improving the limiting effect on the battery cell 110. Naturally, it is also possible that only one set of end plates 122 includes the limiting member 1226 and the other set of end plates 122 does not include the limiting member 1226. The limiting member 1226 of a set of end plates 122 can also equally exert a certain limiting effect on the battery cell 110. Petition 870250080403, dated 08 / 09 / 2025, pp. 72 / 102 21 / 21

[0056] This application also provides a battery pack. The battery pack includes a battery case. The specific structure of the battery case refers to the possible implementations mentioned above. As this battery pack adopts all the technical solutions of all the possible implementations mentioned above, it possesses at least all the beneficial effects brought about by the technical solutions of the possible implementations, which will not be repeated here.

[0057] As the battery pack utilizes the battery case mentioned above, and the limiting portion of the battery case is configured to touch at least one of the battery cells, the Cell Contact System support, or the conductor bar, so as to restrict the movement of the battery cell along a direction away from the connecting structure, it can effectively restrict the movement of the plurality of battery cells in the direction away from the connecting structure, so that, while making the structure of the limiting member relatively simple and less expensive, it can also effectively restrict the movement of the plurality of cells in the direction away from the connecting structure, thus making the battery pack structure simpler and effectively reducing the cost of the battery pack. Petition 870250080403, dated 08 / 09 / 2025, pp. 73 / 102

Claims

1 / 4 CLAIMS 1. Battery box, characterized in that it comprises: a connecting structure; two sets of end plates, each of the two sets of end plates comprising an end plate, the two end plates being connected to both ends of the connecting structure and being arranged opposite each other at intervals, the two end plates and the connecting structure being closed to form an installation space configured to install a battery cell;wherein, at least one of the end plate assemblies further comprises a limiting member, the limiting member comprising a mounting portion and a limiting portion which are connected to each other, the mounting portion being provided on one side of the end plate facing the installation space, the end plate fitting into the mounting portion to limit the movement of the limiting member in a direction away from the connecting structure; the limiting portion being configured to abut at least one of the battery cells, a Cell Contact System support or a conductive bar to limit the movement of the battery cell in a direction away from the connecting structure.

2. Battery box, according to claim 1, characterized in that one of the mounting portions and the end plate of the end plate assemblies are provided with a limiting groove, the other of the mounting portions and the end plate of the Petition 870250080403, dated 08 / 09 / 2025, page 49 / 102 2 / 4 end plate assemblies are provided with a limiting protrusion, the limiting protrusion is connected to the limiting groove.

3. Battery box, according to claim 2, characterized in that the end plate has a first surface on one side facing the installation space, and the mounting portion has a second surface on one side away from the installation space; wherein the first surface is provided with the limiting groove and the second surface protrudes with the limiting protrusion; and / or the first surface is designed with the limiting protrusion and the second surface is provided with the limiting groove.

4. Battery box, according to claim 3, characterized in that the limiting protrusion extends along a first direction on the first surface or the second surface, and the first direction is parallel to the first surface or the second surface and perpendicular to a direction of the limiting member away from the connecting structure; and / or, a number of limiting protrusions is plural, and a plurality of limiting protrusions are sequentially spaced on the first surface or the second surface along the first direction, and the first direction is parallel to the first surface or the second surface and perpendicular to a direction of the limiting member away from the connecting structure; wherein, each of the limiting protrusions is connected in the same limiting groove, or a number of limiting grooves is plural, and the plurality of protrusions Petition 870250080403, dated 08 / 09 / 2025, p.50 / 102 3 / 4 limiting is connected in the plurality of limiting protrusions in one-to-one correspondence.

5. Battery box, according to claim 2, characterized in that the limiting protrusion comprises a confining portion, one end of the confining portion is a connecting end and the other end of the confining portion is a confining end, and the connecting end is connected to the end plate or mounting portion, and in a direction from the connecting end to the confining end, the confining portion is bent into a hook-like structure in a direction from the limiting member away from the connecting structure.

6. Battery box, according to claim 1, characterized in that the mounting portion has a confining surface on one side facing the installation space, the confining surface is configured to abut the battery cell in the installation space, the limiting portion projects from the confining surface; the limiting portion is located at one end of the confining surface, away from the connecting structure.

7. Battery box, according to claim 6, characterized in that the limiting portion extends along an edge at one end of the confining surface, away from the connecting structure; and / or, the number of limiting portions is plural, and the plurality of limiting portions is sequentially distributed at intervals along the edge at one end of the confining surface, away from the connecting structure. Petition 870250080403, dated 08 / 09 / 2025, p. 51 / 102 4 / 4 8. Battery box, according to claim 1, characterized in that the mounting portion is arranged in the form of a plate, the mounting portion has a confining surface on one side facing the installation space and the confining surface is configured to abut a lateral surface of the battery cell in the installation space; or, the end plate has a first surface on one side facing the installation space, the mounting portion comprises an annular frame arranged along a circumferential direction of the first surface, the annular frame is connected to the end plate and the limiting portion is connected to the annular frame.

9. Battery box, according to claim 2, characterized in that the two sets of end plates each comprise the limiting member and / or at least one of the limiting portions and the limiting protrusion is integrally formed with the mounting portion, or at least one of the limiting portions and the limiting protrusion is provided separately with the mounting portion.

10. Battery pack, characterized in that it comprises: a battery cell; the battery case, as defined in claim 1, the battery cell being provided in the installation space of the battery case. Petition 870250080403, dated 08 / 09 / 2025, p. 52 / 102

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