Battery end plate, battery module and battery pack

Abstract

The application discloses a battery end plate, a battery module and a battery pack, and belongs to the technical field of energy storage. The battery end plate comprises an end plate body and a reinforcing pipe. The reinforcing pipe is fixedly arranged in the through hole of the end plate body, and the strength of the reinforcing pipe is greater than that of the end plate body. Therefore, the reinforcing pipe can increase the overall structural strength of the battery end plate. In this way, the battery end plate has good effects of resisting stress when the battery core circulates and expands and resisting the pulling force of the steel belt. In addition, the first slot is arranged on the end plate body, and the part of the reinforcing pipe exposed through the first slot has a second slot. In this way, the hoisting tool can move the battery module through the second slot, thereby avoiding the risk that the end plate body is deformed due to the direct contact between the hoisting tool and the end plate body, and the reliability of the battery end plate can be improved.

Description

Technical Field

[0001] This application relates to the field of energy storage technology, and in particular to a battery end plate, a battery module, and a battery pack. Background Technology

[0002] An end plate is a structure used to fix and protect individual battery cells.

[0003] Currently, end plates are either metal or plastic. The structural strength of plastic end plates is lower than that of metal end plates. Therefore, reinforcing ribs are usually added to plastic end plates to increase their structural strength in order to resist the stress during the cyclic expansion of the battery cell and the tensile force of the steel strip.

[0004] However, due to the material properties of the plastic end plate, the strength increase from the reinforcing ribs is limited, resulting in low structural strength of the plastic end plate and making it prone to deformation. Utility Model Content

[0005] This application provides a battery endplate, a battery module, and a battery pack. The technical solution is as follows:

[0006] According to a first aspect of this application, a battery end plate is provided, the battery end plate comprising: an end plate body and a reinforcing tube;

[0007] The end plate body has a through hole and a first slot communicating with the through hole; the first slot is located on one side of the end plate body in the thickness direction, the through hole extends along a first direction and penetrates the end plate body, and the through hole is distributed in a second direction on at least one side of the end plate body; the first direction and the second direction intersect each other and both intersect with the thickness direction of the end plate body.

[0008] The reinforcing tube is fixed in the through hole, and the portion of the reinforcing tube exposed through the first slot has a second slot; the second slot communicates with the interior of the reinforcing tube and with the first slot.

[0009] The strength of the reinforcing tube is greater than the strength of the end plate body.

[0010] Optionally, the orthographic projection of the second slot onto the plate surface parallel to the end plate body is located within the orthographic projection of the first slot onto the plate surface parallel to the end plate body.

[0011] Optionally, the length of the second slot in the first direction is less than the length of the first slot in the first direction; and / or, the width of the second slot in the second direction is less than or equal to the width of the first slot in the second direction.

[0012] Optionally, the end plate body includes: a main support plate and a connecting part; the main support plate is fixedly connected to the connecting part on one side in the thickness direction, and the connecting part has the through hole;

[0013] The main support plate has a plurality of first grooves arranged in an array on the side opposite to the connecting part, and the depth of the first grooves is less than the thickness of the main support plate.

[0014] Optionally, the central region of the main support plate on the side away from the connecting part has a bearing groove, and a plurality of first strips and a plurality of second strips are distributed in the bearing groove, wherein the first strips extend along the first direction and the second strips extend along the second direction;

[0015] The plurality of first strips and the plurality of second strips are used to form the plurality of first grooves.

[0016] Optionally, in the thickness direction, the depth of the bearing groove is greater than the thickness of the first strip and greater than the thickness of the second strip.

[0017] Optionally, the orthographic projection of the connecting portion on the main support plate does not overlap with the area where the bearing groove is located.

[0018] Optionally, the main support plate also has an edge region on the side opposite to the connecting part, and the edge region is distributed around the central region;

[0019] The orthographic projection of the connecting part on the main support plate is located within the edge region.

[0020] Optionally, the connecting part has a transition surface between the side opposite to the main support plate and the outer side of the end plate body, and the transition surface is an outwardly convex arc-shaped surface.

[0021] Optionally, the connecting portion further has a third groove on the side opposite to the main support plate, and the third groove is located on the side of the connecting portion opposite to the main support plate;

[0022] The orthographic projection of the third groove on the main support plate does not overlap with the orthographic projection of the first slot on the main support plate.

[0023] Optionally, the end plate body further includes: a plurality of reinforcing ribs, the plurality of reinforcing ribs and the connecting portion being located on the same side of the main support plate, and the main support plate being fixedly connected to the plurality of reinforcing ribs on one side of the thickness direction;

[0024] The plurality of reinforcing ribs are used to form a plurality of fourth grooves arranged in an array.

[0025] Optionally, the end plate body is a plate-shaped structure made of plastic material, and the reinforcing tube is a tubular structure made of metal material.

[0026] Secondly, a battery module is provided, comprising: a battery end plate and a plurality of battery cells, wherein the battery end plate is any of the aforementioned battery end plates.

[0027] Thirdly, a battery pack is provided, comprising: a housing, a connector, and a battery module, wherein the battery module is the aforementioned battery module;

[0028] The connector passes through the reinforcing tube in the battery module and is then connected to the housing.

[0029] The beneficial effects of the technical solutions provided in this application include at least the following:

[0030] A reinforcing tube is fixedly installed in the through hole of the end plate body. The strength of the reinforcing tube is greater than that of the end plate body. Therefore, the reinforcing tube can increase the overall structural strength of the battery end plate. Thus, the battery end plate is better able to resist the stress of cell cyclic expansion and the tensile force of steel strip. Furthermore, a first slot is provided on the end plate body, and the portion of the reinforcing tube exposed through the first slot has a second slot. In this way, the lifting tool can move the battery module through the second slot, avoiding the risk of deformation of the end plate body due to direct contact between the lifting tool and the end plate body, thereby improving the reliability of the battery end plate. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural diagram of a battery end plate provided in an embodiment of this application;

[0033] Figure 2 yes Figure 1 An exploded view of the provided battery endplate;

[0034] Figure 3 yes Figure 1 A front view of the provided battery end plate;

[0035] Figure 4 This is a three-dimensional structural diagram of another battery module provided in an embodiment of this application;

[0036] Figure 5 yes Figure 4 A rear view of the provided battery module;

[0037] Figure 6 yes Figure 5 An isometric schematic diagram of the provided battery module;

[0038] Figure 7 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application;

[0039] Figure 8 This is a schematic diagram of the hoisting of a battery module provided in an embodiment of this application.

[0040] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0042] This application provides a battery end plate, please refer to... Figure 1 and Figure 2 , Figure 1 This is a three-dimensional structural diagram of a battery end plate provided in an embodiment of this application. Figure 2 yes Figure 1 An exploded view of a battery end plate is provided, the battery end plate 100 including: an end plate body 110 and a reinforcing tube 120.

[0043] The battery end plate 100 provided in this application embodiment can be applied to a battery module and used to fix and protect the battery cells in the battery module. Therefore, the battery end plate 100 needs to have a certain structural strength to cope with the internal and external stresses of the battery module, such as the expansion pressure applied by the battery cells and the tensile force of the steel strip.

[0044] The end plate body 110 has a through hole K1 and a first slot H1 communicating with the through hole K1. The first slot H1 is located on one side of the end plate body 110 in the thickness direction Z. The through hole K1 extends along the first direction X and penetrates the end plate body 110, and the through holes K1 are distributed on at least one side of the end plate body 110 in the second direction Y. The first direction X and the second direction Y intersect, and both intersect with the thickness direction Z of the end plate body 110.

[0045] The through hole K1 is used to accommodate the reinforcing tube 120 and the connector, which is used to secure the battery module with the battery end plate 100 applied to it in the battery pack. For example, Figure 1 In the battery end plate 10 shown, there are two through holes K1, and the two through holes K1 are distributed on both sides of the end plate body 110 in the second direction Y to ensure balanced force distribution. However, this application is not limited to this. The first slot H1 is used to expose at least a portion of the reinforcing tube 120 so that the second slot H2 is exposed.

[0046] The reinforcing tube 120 is fixed in the through hole K1, and the portion of the reinforcing tube 120 exposed through the first slot H1 has a second slot H2. The second slot H2 communicates with the interior of the reinforcing tube 120 and with the first slot H1. Here, the reinforcing tube 120 is a tubular structure, and the opening inside the reinforcing tube 120 can extend along the first direction X. Therefore, the extension direction of the opening inside the reinforcing tube 120 and the through hole K1 can be the same to ensure that the connector can pass through the opening inside the reinforcing tube 120 without interference. The second slot H2 can be used as a lifting hole, that is, the hook in the lifting fixture can pass through the first slot H1 and hook into the second slot H2, thereby enabling the movement of the battery end plate 100 and driving the battery module using the battery end plate 100 to move.

[0047] The strength of the reinforcing tube 120 is greater than that of the end plate body 110. Here, strength refers to the ability of the reinforcing tube 120 to resist damage and deformation under stress. For example, the strength of the reinforcing tube 120 can be measured by at least one of tensile / compressive strength, yield strength, and fatigue strength, where: tensile / compressive strength is the maximum load-bearing capacity of a material under tension or compression; yield strength is the critical stress at which the material begins to undergo plastic deformation; and fatigue strength is the durability of the material under cyclic loading. In this application, the reinforcing tube 120 and the end plate body 110 can be made of different materials to achieve different strengths, but this application is not limited to this. For example, different strengths can also be achieved through different manufacturing processes or structural designs.

[0048] Therefore, the reinforcing tube 120 not only improves the overall structural strength of the battery end plate 100, effectively resisting the expansion pressure exerted by the battery cells and the tensile force of the steel strip, but also ensures that the end plate body 110 does not deform during the movement of the battery end plate 100 by the hoisting fixture, thereby improving the reliability of the battery end plate.

[0049] In summary, this application provides a battery end plate, wherein a reinforcing tube is fixedly disposed in a through hole in the end plate body. The strength of the reinforcing tube is greater than the strength of the end plate body, thus increasing the overall structural strength of the battery end plate. This improves the battery end plate's resistance to stress during cell cyclic expansion and the tensile force of the steel strip. Furthermore, a first slot is provided on the end plate body, and the portion of the reinforcing tube exposed through the first slot has a second slot. This allows lifting fixtures to move the battery module through the second slot, avoiding the risk of deformation caused by direct contact between the lifting fixtures and the end plate body, thereby improving the reliability of the battery end plate.

[0050] The structure of the second slot H2 is described below:

[0051] Optionally, the orthographic projection of the second slot H2 onto the plate surface parallel to the end plate body 110 lies within the orthographic projection of the first slot H1 onto the plate surface parallel to the end plate body 110. Here, the plate surface of the end plate body 110 can be the plane containing the first direction X and the second direction Y. This arrangement avoids the exposed portion of the second slot H2 being too small, allowing the second slot H2 to be fully exposed within the first slot H1, ensuring that the hook in the lifting fixture can pass through the first slot H1 and hook onto the second slot H2.

[0052] To ensure that the second slot H2 is fully exposed within the first slot H1, one possible approach is to set the relative sizes of the first slot H1 and the second slot H2. Please refer to [reference needed]. Figure 3 , Figure 3 yes Figure 1 A front view of the provided battery end plate. The length D12 of the second slot H2 in the first direction X is less than the length D11 of the first slot H1 in the first direction X. And / or, the width D22 of the second slot H2 in the second direction Y is less than or equal to the width D21 of the first slot H1 in the second direction Y.

[0053] It should be noted that the shapes of the first slot H1 and the second slot H2 may include, but are not limited to, those of other types. Figure 1 The rectangular slots shown can also be circular or polygonal, for example, the first slot H1 and the second slot H2. Furthermore, the shapes of the first slot H1 and the second slot H2 can be the same or different; this embodiment does not impose any limitations on this.

[0054] In one exemplary embodiment, please refer to Figure 4 and Figure 5 , Figure 4 This is a three-dimensional structural diagram of another battery module provided in an embodiment of this application. Figure 5 yes Figure 4A rear view of the provided battery module. The end plate body 110 includes a main support plate 111 and a connecting portion 112. The main support plate 111 is fixedly connected to the connecting portion 112 on one side in the thickness direction Z, and the connecting portion 112 has a through hole K1. Here, the main support plate 111 and the connecting portion 112 can be an integral structure. For example, in the embodiments of this application, the main support plate 111 and the connecting portion 112 can be formed in one step by an in-mold injection molding process, thereby improving the connection strength between the main support plate 111 and the connecting portion 112.

[0055] The main support plate 111 is used to support the battery cells in the battery module. The connecting part 112 is the part with a through hole K1. Therefore, the thickness of the connecting part 112 is greater than the thickness of the main support plate 111.

[0056] Optionally, the connecting portion 112, on the side facing away from the main support plate 111, has a transition surface S1 with the outer surface of the end plate body 110. The transition surface S1 is an outwardly convex arc-shaped surface. Here, the outer surface of the end plate body 110 is the outer surface of the end plate body 110 in the second direction Y, and the transition surface S1 is located at the corner of the connecting portion 112. That is, the connecting portion 112 can be rounded at the corner to avoid stress concentration. For example, in the end plate body 110, there can be two connecting portions 112, and the two connecting portions 112 are distributed on both sides of the end plate body 110 in the second direction Y to ensure balanced force distribution.

[0057] The main support plate 111 has multiple first grooves A1 arranged in an array on the side opposite to the connecting part 112. This side of the main support plate 111, which is opposite to the connecting part 112 and is in contact with the battery cell, experiences slight expansion during charging and discharging due to the electrochemical reactions occurring in the battery cell and the material properties of the electrode materials and electrolyte within the battery cell. Since a battery module typically comprises multiple battery cells, the volume change becomes more pronounced after long-term use. By providing multiple first grooves A1, space can be reserved for the potential expansion of the multiple battery cells, thus releasing the expansion stress of the battery cells. This avoids deformation of the battery end plate 100 due to expansion, thereby improving the structural stability of the battery end plate 100.

[0058] Furthermore, battery cells can generate heat during charging and discharging. By setting multiple first grooves A1, heat dissipation channels can be reserved for battery cells, thereby improving heat dissipation and thus increasing the lifespan and safety of battery modules using the battery end plate 100.

[0059] The depth of the first groove A1 is less than the thickness of the main support plate 111, meaning that the first groove A1 is not a through groove. This ensures that the main support plate 111 can effectively buffer external stress and dissipate heat, while minimizing the impact of the first groove A1 on the structural strength of the main support plate 111. For example, the thickness of the main support plate 111 can be 3 mm, and the depth of the first groove A1 can range from 1 mm to 2 mm, such as 1 mm.

[0060] In this embodiment, the depth of the first groove A1 is positively correlated with the expansion rate of the battery cell. The expansion rate of the battery cell can be determined by performing a cyclic charge-discharge test, and the depth of the first groove A1 can be set based on the expansion rate of the battery cell. The depth of the first groove A1 is also positively correlated with the number of battery cells in the battery module. That is, the more battery cells there are in the battery module, the more space needs to be reserved to alleviate the expansion pressure.

[0061] Alternatively, please refer to Figure 5 and Figure 6 , Figure 6 yes Figure 5 A schematic diagram of an isometric view of the provided battery module shows that the central region Q1 of the main support plate 111 opposite to the connecting portion 112 has a bearing groove A2, and a plurality of first strips A11 and a plurality of second strips A12 distributed within the bearing groove A2. The first strips A11 extend along a first direction X, and the second strips A12 extend along a second direction Y. The plurality of first strips A11 and the plurality of second strips A12 are used to form a plurality of first grooves A1.

[0062] The support groove A2 is used to accommodate multiple first strips A11 and multiple second strips A12, for example, as shown below. Figure 5 and Figure 6 As shown, the boundary of the bearing groove A2 surrounds multiple first grooves A1, that is, multiple first grooves A1 are distributed in the bearing groove A2. Based on the extension directions of multiple first strips A11 and multiple second strips A12, the multiple first grooves A1 are arranged in an array in the first direction X and the second direction Y.

[0063] The depth of the bearing groove A2 is less than the thickness of the main support plate 111. That is, the bearing groove A2 is not a through groove. In this way, while ensuring that the main support plate 111 can buffer external stress and dissipate heat, the bearing groove A2 has little impact on the structural strength of the main support plate 111.

[0064] It should be noted that the side of the main support plate 111 away from the connecting portion 112 may also include an edge region Q2, which is distributed around the central region Q1. In this embodiment, a first groove A1 and a bearing groove A2 are provided in the central region Q1, so the central region Q1 mainly serves to release expansion stress and dissipate heat. The edge region Q2 can be a flat surface, so the edge region Q2 mainly serves to support the battery cells to ensure that the main support plate 111 has sufficient support strength for multiple battery cells. The orthogonal projection of the connecting portion 112 on the main support plate 111 is located within the edge region Q2, that is, the position of the connecting portion 112 is opposite to the edge region Q2 with strong support strength in the thickness direction Z, thereby improving the structural stability of the connecting portion 112.

[0065] Optionally, in the thickness direction Z, the depth of the bearing groove A2 is greater than the thickness of the first strip A11 and greater than the thickness of the second strip A12. This creates a certain gap between the first strip A11 and the second strip A12 and the battery cell, thereby further improving the stress buffering and heat dissipation effects.

[0066] Optionally, the orthographic projection of the connecting portion 112 on the main support plate 111 does not overlap with the area where the bearing groove A2 is located. For example, the orthographic projection of the connecting portion 112 on the main support plate 111 can be located within the orthographic projection of the edge region Q2 on the main support plate 111. This results in higher strength for the portion of the main support plate 111 in contact with the connecting portion 112. Since the connecting portion 112 is near the corner of the battery end plate 100, where stress is concentrated, this arrangement provides higher support strength for the portion of the main support plate 111 in contact with the connecting portion 112, thus improving the reliability of the connecting portion 112 at the corner.

[0067] Alternatively, please refer to Figure 4 The end plate body 110 further includes a plurality of reinforcing ribs 113, which are located on the same side of the main support plate 111 as the connecting portions 112, and are fixedly connected to the plurality of reinforcing ribs 113 on one side of the main support plate 111 in the thickness direction Z. When there are two connecting portions 112, the reinforcing ribs 113 can be located between the two connecting portions 112. Here, the main support plate 111 and the reinforcing ribs 113 can be an integral structure. For example, in this embodiment, the main support plate 111 and the reinforcing ribs 113 can be formed in one step by in-mold injection molding, thereby improving the connection strength between the main support plate 111 and the reinforcing ribs 113.

[0068] The plurality of reinforcing ribs 113 are used to form a plurality of fourth grooves A5 arranged in an array. In one possible implementation, at least a portion of the plurality of reinforcing ribs 113 extend along a first direction X and / or a second direction Y. For example, as shown... Figure 4 As shown, the multiple reinforcing ribs 113 can be divided into three types of reinforcing ribs 113. The first type of reinforcing ribs 113 all extend along a first direction X, the second type of reinforcing ribs 113 all extend along a second direction Y, and the third type of reinforcing ribs 113 all extend along a third direction. This third direction can be on the same plane as the first direction X and the second direction Y, and the third direction intersects both the first direction X and the second direction Y.

[0069] Optionally, the end plate body 110 also has a second groove A3 and a third groove A4.

[0070] The second groove A3 and the reinforcing rib 113 are located on the same side of the main support plate 111, and the second groove A3 is located on the side of the reinforcing rib 113 in the first direction X. The second groove A3 can be used to set the first bracket, which is used to connect to the input or output end of the busbar. This allows the battery end plate 100 and the first bracket to fix the busbar, preventing it from shaking and falling off, thus ensuring the normal operation of the battery module. At least a portion of the sidewall of the second groove A3 is formed by the main support plate 111, the connecting part 112, and the reinforcing rib 113.

[0071] For example, Figure 4 In the battery end plate 100 shown, there are two second grooves A3, and l

[0072] The second grooves A3 are arranged along the second direction Y. When the battery end plate 100 is applied in a battery module, one battery end plate 100 can be provided on each side of the multiple battery cells in the arrangement direction. One second groove A3 in one battery end plate 100 is used to provide a bracket corresponding to the input end, and one second groove A3 in the other battery end plate 100 is used to provide a bracket corresponding to the output end. When the number of battery cells is odd, the second grooves A3 of the two battery end plates 100 that provide brackets are staggered in the second direction Y.

[0073] The third groove A4 is located on the side of the connecting portion 112 opposite to the main support plate 111. The third groove A4 is used to set the steel strip, which can limit the steel strip and prevent it from slipping, thereby improving the reliability of the steel strip in fixing multiple battery cells and the battery end plate 100. Here, since a reinforcing tube 120 is provided at the location of the third groove A4 where the steel strip is set, the reinforcing tube 120 can resist the tensile force of the steel strip, thereby reducing the risk of deformation of the battery end plate 100.

[0074] For example, in a connecting portion 112, the number of third grooves A4 can be at least two, and the at least two third grooves A4 are respectively distributed on both sides of the first slot H1 in the first direction X. In the case where two connecting portions 112 are provided in the battery end plate, the third grooves A4 for providing the same steel strip in the two connecting portions 112 are arranged opposite to each other.

[0075] Optionally, the end plate body 110 is a plate-like structure made of plastic material, and the reinforcing tube 120 is a tubular structure made of metal material. The plastic material provides insulation, eliminating the need for an insulating sheet between the battery end plate 100 and the individual battery cells in the battery module. Metal materials have higher strength than plastic materials; using a metal reinforcing tube 120 increases the strength of the battery end plate 100, resisting the stress of cyclic expansion of the battery cells and the tensile force of the steel strip, and preventing deformation of the battery end plate 100 during hoisting. For example, the reinforcing tube 120 can be made of 304 stainless steel.

[0076] In summary, this application provides a battery end plate, wherein a reinforcing tube is fixedly disposed in a through hole in the end plate body. The strength of the reinforcing tube is greater than the strength of the end plate body, thus increasing the overall structural strength of the battery end plate. This improves the battery end plate's resistance to stress during cell cyclic expansion and the tensile force of the steel strip. Furthermore, a first slot is provided on the end plate body, and the portion of the reinforcing tube exposed through the first slot has a second slot. This allows lifting fixtures to move the battery module through the second slot, avoiding the risk of deformation caused by direct contact between the lifting fixtures and the end plate body, thereby improving the reliability of the battery end plate.

[0077] This application also provides a battery module, please refer to... Figure 7 , Figure 7 This is a schematic diagram of the structure of a battery module provided in an embodiment of this application. The battery module 200 includes: a battery end plate 100 and a plurality of battery cells 210, wherein the battery end plate 100 is the battery end plate 100 provided in any of the above embodiments.

[0078] For example, Figure 7 The battery module 200 shown includes two battery end plates 100, which are located on both sides of a plurality of battery cells 210 in the thickness direction Z, to fix and protect the plurality of battery cells.

[0079] Since the module 200 includes the battery end plate 100 provided in any of the above embodiments, the module 200 can also have a similar effect, that is, the reliability of the module 200 can be improved.

[0080] Optionally, the battery module 200 may also include: a steel strip 220 and a busbar 230.

[0081] At least a portion of the steel strip 220 is located in the third groove A4. The steel strip 220 is used to bind the battery end plate 100 and multiple battery cells 210 together, which can ensure the stability of the battery module 200 during movement. Figure 7 The battery module 200 shown has two steel strips 220, which can balance the force on the battery end plate 100 in the first direction X. Furthermore, the corners, which are most susceptible to the tensile force of the steel strips 220, are reinforced with reinforcing tubes 120 to enhance their strength, thereby improving the reliability of the battery module 200.

[0082] Busbar 230 is used to electrically connect multiple battery cells 210. For example, busbar 230 can be a copper busbar or an aluminum busbar. Busbar 230 has an input terminal and an output terminal, which are respectively fixed by a first bracket 240 in the second groove of the two battery end plates 10 to prevent busbar 230 from shaking and falling off, thereby ensuring the normal operation of battery module 200.

[0083] Please refer to Figure 8 , Figure 8 This is a schematic diagram of a battery module hoisting according to an embodiment of this application. The hook in the hoisting fixture C can be hooked into the second slot H2 of the reinforcing tube 120, thereby enabling the movement of the battery end plate 100 and driving the battery module 200 to move. Here, Figure 8 The lifting fixture C shown may only be a part of the lifting fixture structure, and this application embodiment does not limit this.

[0084] For example, two second slots H2 are provided in a battery end plate 100, and two battery end plates 100 are provided in the battery module 200. In this way, when the lifting fixture C applies an external force to the battery module 100, the battery module 100 can be subjected to balanced forces in both the second direction Y and the thickness direction Z, thereby improving the stability of the battery module during movement.

[0085] This application also provides a battery pack, including: a housing, a connector, and a battery module, wherein the battery module is the same as that provided in any of the above embodiments. The connector passes through a reinforcing tube in the battery module and connects to the housing. For example, the connector can be a long screw, which can be used to lock the battery module onto the housing to secure it.

[0086] Since the battery pack includes the battery module provided in any of the above embodiments, and the battery module includes the battery end plate provided in any of the above embodiments, the battery pack can also have a similar effect, that is, it can improve the reliability of the battery pack.

[0087] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0088] In this application, the term "at least one of A and B" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, "at least one of A and B" can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone. Similarly, "at least one of A, B, and C" indicates that seven relationships can exist, representing seven cases: A exists alone, B exists alone, C exists alone, A and B exist simultaneously, A and C exist simultaneously, C and B exist simultaneously, and A, B, and C exist simultaneously.

[0089] It should be noted that the dimensions of layers and regions may be exaggerated in the accompanying drawings for clarity. Furthermore, it is understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be intermediate layers. Additionally, it is understood that when an element or layer is referred to as being "below" another element or layer, it can be directly below the other element, or there may be more than one intermediate layer or element. Furthermore, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Similar reference numerals throughout indicate similar elements.

[0090] In this application, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" means two or more, unless otherwise expressly defined.

[0091] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery end plate, characterized in that, The battery end plate (100) includes: an end plate body (110) and a reinforcing tube (120); The end plate body (110) has a through hole (K1) and a first slot (H1) communicating with the through hole (K1); the first slot (H1) is located on one side of the end plate body (110) in the thickness direction (Z), the through hole (K1) extends along the first direction (X) and penetrates the end plate body (110), and the through hole (K1) is distributed on at least one side of the end plate body (110) in the second direction (Y); the first direction (X) and the second direction (Y) intersect, and both intersect with the thickness direction (Z) of the end plate body (110); The reinforcing tube (120) is fixed in the through hole (K1), and the portion of the reinforcing tube (120) exposed through the first slot (H1) has a second slot (H2); the second slot (H2) communicates with the interior of the reinforcing tube (120) and with the first slot (H1); The strength of the reinforcing tube (120) is greater than the strength of the end plate body (110).

2. The battery end plate according to claim 1, characterized in that, The orthographic projection of the second slot (H2) onto the plate surface parallel to the end plate body (110) is located within the orthographic projection of the first slot (H1) onto the plate surface parallel to the end plate body (110).

3. The battery end plate according to claim 2, characterized in that, The length (D12) of the second slot (H2) in the first direction (X) is less than the length (D11) of the first slot (H1) in the first direction (X); and / or, the width (D22) of the second slot (H2) in the second direction (Y) is less than or equal to the width (D21) of the first slot (H1) in the second direction (Y).

4. The battery end plate according to any one of claims 1-3, characterized in that, The end plate body (110) includes: a main support plate (111) and a connecting part (112); the main support plate (111) is fixedly connected to the connecting part (112) on one side in the thickness direction (Z), and the connecting part (112) has the through hole (K1); The main support plate (111) has a plurality of first grooves (A1) arranged in an array on the side opposite to the connecting part (112), and the depth of the first grooves (A1) is less than the thickness of the main support plate (111).

5. The battery end plate according to claim 4, characterized in that, The main support plate (111) has a bearing groove (A2) in the central region (Q1) on the side opposite to the connecting part (112), and a plurality of first strips (A11) and a plurality of second strips (A12) distributed in the bearing groove (A2), the first strips (A11) extending along the first direction (X), and the second strips (A12) extending along the second direction (Y); The plurality of first strips (A11) and the plurality of second strips (A12) are used to form the plurality of first grooves (A1).

6. The battery end plate according to claim 5, characterized in that, In the thickness direction (Z), the depth of the bearing groove (A2) is greater than the thickness of the first strip (A11) and greater than the thickness of the second strip (A12).

7. The battery end plate according to claim 5, characterized in that, The orthographic projection of the connecting part (112) on the main support plate (111) does not overlap with the area where the bearing groove (A2) is located.

8. The end plate according to claim 7, characterized in that, The main support plate (111) also has an edge region (Q2) on the side opposite to the connecting part (112), and the edge region (Q2) is distributed around the central region (Q1); The orthographic projection of the connecting part (112) on the main support plate (111) is located within the edge region (Q2).

9. The end plate according to claim 4, characterized in that, The connecting part (112) is located away from the main support plate (111) and has a transition surface (S1) between it and the outer side of the end plate body (110). The transition surface (S1) is an outwardly convex arc-shaped surface.

10. The end plate according to any one of claims 5-9, characterized in that, The connecting part also has a third groove (A4) on the side away from the main support plate, and the third groove (A4) is located on the side of the connecting part (112) away from the main support plate (111); The orthographic projection of the third groove (A4) on the main support plate (111) does not overlap with the orthographic projection of the first slot (H1) on the main support plate (111).

11. The end plate according to any one of claims 5-9, characterized in that, The end plate body (110) further includes: a plurality of reinforcing ribs (113), the plurality of reinforcing ribs (113) and the connecting part (112) are located on the same side of the main support plate (111), and the main support plate (111) is fixedly connected to the plurality of reinforcing ribs (113) on one side in the thickness direction (Z); The plurality of reinforcing ribs (113) are used to form a plurality of fourth grooves (A5) arranged in an array.

12. The battery end plate according to any one of claims 1-3, 5-9, characterized in that, The end plate body (110) is a plate-shaped structure made of plastic material, and the reinforcing tube (120) is a tubular structure made of metal material.

13. A battery module, characterized in that, include: The battery end plate (100) and a plurality of battery cells (210) are provided, wherein the battery end plate (100) is the battery end plate (100) according to any one of claims 1 to 12.

14. A battery pack, characterized in that, include: The enclosure (300), connector (400), and battery module (200), wherein the battery module (200) is the battery module (200) as described in claim 13; The connector (400) passes through the reinforcing tube (120) in the battery module (200) and is connected to the housing (300).

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