Battery module end plate, battery module and battery pack

Abstract

The present invention relates to the field of battery technology, and proposes a battery module end plate, a battery module and a battery pack. The battery module end plate comprises: an end plate body; a first connector, the first connector is arranged at one end of the end plate body in the length direction, and at least a portion of the first connector extends out along a side away from the battery; a second connector, the second connector is arranged at the other end of the end plate body in the length direction, and at least a portion of the second connector extends out along a side away from the battery; wherein at least one of the first connector and the second connector is telescopically arranged along the thickness direction of the end plate body, and when the battery module end plate and the battery are locked by external components, the installation or manufacturing tolerance can be filled by the telescopic movement of the first connector and / or the second connector, so as to ensure the fixing effect, that is, the fixing effect of the battery module is ensured by improving the structure of the battery module end plate.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a battery module end plate, a battery module and a battery pack. Background Art

[0002] The battery module in the related art includes two end plates for limiting the batteries, a plurality of batteries are arranged between the two end plates, and the end plates are fixed by external components to fix the batteries.

[0003] Due to the structural limitations of the end plate and the battery itself, when the end plate is fixed, the tolerance of each structural component may cause the external component to be unable to fix the end plate well, thereby affecting the normal use of the battery module. Summary of the invention

[0004] The present invention provides a battery module end plate, a battery module and a battery pack to improve the performance of the battery module end plate.

[0005] According to a first aspect of the present invention, there is provided a battery module end plate, comprising:

[0006] End plate body;

[0007] A first connecting member, the first connecting member is disposed at one end of the end plate body in the length direction, and at least a portion of the first connecting member extends out along a side away from the battery;

[0008] A second connecting member, which is disposed at the other end of the end plate body in the length direction, and at least a portion of the second connecting member extends out along a side away from the battery;

[0009] Wherein, at least one of the first connecting member and the second connecting member is telescopically arranged along the thickness direction of the end plate body.

[0010] The battery module end plate of the embodiment of the present invention includes an end plate body, a first connecting member and a second connecting member, wherein the first connecting member and the second connecting member are respectively arranged at opposite ends of the length direction of the end plate body. Since at least one of the first connecting member and the second connecting member is telescopically arranged along the thickness direction of the end plate body, when the battery module end plate and the battery are locked by external components, the installation or manufacturing tolerance can be compensated by the telescopic movement of the first connecting member and / or the second connecting member, thereby ensuring the fixing effect, that is, ensuring the fixing effect of the battery module by improving the structure of the battery module end plate.

[0011] According to a second aspect of the present invention, there is provided a battery module comprising the above-mentioned battery module end plate.

[0012] The battery module according to an embodiment of the present invention includes a battery module end plate, and the battery module end plate includes an end plate body, a first connecting member, and a second connecting member. The first connecting member and the second connecting member are respectively disposed at opposite ends in the length direction of the end plate body. Since at least one of the first connecting member and the second connecting member is disposed telescopically in the thickness direction of the end plate body, when the battery module end plate and the battery are locked by an external component, the installation or manufacturing tolerance can be filled by the telescoping of the first connecting member and / or the second connecting member, so as to ensure the fixing effect and thus improve the use performance of the battery module.

[0013] According to a third aspect of the present invention, there is provided a battery pack including the above-mentioned battery module.

[0014] The battery pack according to an embodiment of the present invention includes a battery module. The battery module end plate includes an end plate body, a first connecting member, and a second connecting member. The first connecting member and the second connecting member are respectively disposed at opposite ends in the length direction of the end plate body. Since at least one of the first connecting member and the second connecting member is disposed telescopically in the thickness direction of the end plate body, when the battery module end plate and the battery are locked by an external component, the installation or manufacturing tolerance can be filled by the telescoping of the first connecting member and / or the second connecting member, so as to ensure the fixing effect and thus improve the use performance of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] To better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted to emphasize and clearly illustrate the technical features of the present disclosure. Additionally, related elements or components may be arranged differently as known in the art. Further, in the drawings, the same reference numerals denote the same or similar components in each drawing. Among them:

[0016] Figure 1 is a schematic structural view of a battery module shown according to an exemplary embodiment;

[0017] Figure 2 is a schematic structural view of a battery module end plate from one perspective shown according to an exemplary embodiment;

[0018] Figure 3 is a schematic structural view of a battery module end plate from another perspective shown according to an exemplary embodiment;

[0019] Figure 4 is a partial schematic structural view of a battery module end plate from one perspective shown according to an exemplary embodiment;

[0020] Figure 5 is a partial schematic structural view of a battery module end plate from another perspective shown according to an exemplary embodiment;

[0021] Figure 6 is a schematic structural view of a perspective of an end plate of a battery module shown according to another exemplary embodiment;

[0022] Figure 7 is a schematic structural view of another perspective of an end plate of a battery module shown according to another exemplary embodiment;

[0023] Figure 8 is a schematic partial structural view of a perspective of an end plate of a battery module shown according to another exemplary embodiment;

[0024] Figure 9 is a schematic partial structural view of another perspective of an end plate of a battery module shown according to another exemplary embodiment.

[0025] The description of the reference numerals is as follows:

[0026] 1, battery; 2, fixing member; 3, insulating plate; 10, end plate body; 11, strengthening portion; 12, first surface; 13, second surface; 14, groove; 20, first connecting member; 21, first cavity; 22, first depression; 30, second connecting member; 31, second cavity; 32, second depression; 40, first strengthening member; 41, first notch; 42, first protrusion; 43, first weld seam; 50, second strengthening member; 51, second notch; 52, second protrusion; 53, second weld seam; 60, connecting through hole; 61, cantilever protrusion; 62, avoidance groove; 63, limiting post. Specific Embodiments

[0027] Next, the technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the protection scope of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the protection scope of the present disclosure.

[0028] In the description of the present disclosure, unless otherwise clearly defined and limited, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "plurality" means two or more; the term "and / or" includes any combination and all combinations of one or more of the associated listed items. In particular, referring to "the / this" object or "one" object also intends to represent one of the possible multiple such objects.

[0029] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0030] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0031] One embodiment of the present invention provides a battery module end plate, please refer to Figures 1 to 9 The battery module end plate includes: an end plate body 10; a first connecting member 20, the first connecting member 20 is arranged at one end of the end plate body 10 in the length direction, and at least a part of the first connecting member 20 extends out along a side away from the battery 1; a second connecting member 30, the second connecting member 30 is arranged at the other end of the end plate body 10 in the length direction, and at least a part of the second connecting member 30 extends out along a side away from the battery 1; wherein, at least one of the first connecting member 20 and the second connecting member 30 is telescopically arranged along the thickness direction of the end plate body 10.

[0032] A battery module end plate according to an embodiment of the present invention comprises an end plate body 10, a first connector 20 and a second connector 30, wherein the first connector 20 and the second connector 30 are respectively arranged at opposite ends of the length direction of the end plate body 10. Since at least one of the first connector 20 and the second connector 30 is telescopically arranged along the thickness direction of the end plate body 10, when the battery module end plate and the battery are locked by external components, the installation or manufacturing tolerance can be compensated by the telescopic movement of the first connector 20 and / or the second connector 30, thereby ensuring the fixing effect, that is, ensuring the fixing effect of the battery module by improving the structure of the battery module end plate.

[0033] It should be noted that after the battery module end plate and the battery 1 are stacked, the battery 1 and the battery module end plate can be fixed by the fixing member 2, and the fixing member 2 can be a cable tie. In the related art, during the tightening process of the cable tie, due to the tolerance of the battery thickness in the length direction of the battery module, after the stacking tolerance is accumulated, the steel cable tie may not be able to be loaded into the battery module (the battery is too thick), or the cable tie is relatively loose after installation (the battery is too thin). The battery module end plate in this embodiment is provided with a retractable first connector 20 and / or second connector 30, so that the above tolerance can be compensated by the extension and contraction of the first connector 20 and / or the second connector 30, thereby ensuring that the cable tie is reliably tightened.

[0034] The end plate body 10 has a length direction, a width direction and a thickness direction. The length direction of the end plate body 10 can be the length direction of the battery 1, the width direction of the end plate body 10 can be the width direction of the battery 1, and the thickness direction of the end plate body 10 can be the thickness direction of the battery 1, that is, the thickness direction of the end plate body 10 is the stacking direction of the batteries in the battery module, that is, the arrangement direction of each battery 1.

[0035] At least one of the first connector 20 and the second connector 30 is telescopically arranged along the thickness direction of the end plate body 10. The first connector 20 and / or the second connector 30 may be partially telescopically arranged. For example, the first connector 20 and / or the second connector 30 may be deformably arranged, and elastic deformation is achieved by compression of the fixing member 2. The first connector 20 and / or the second connector 30 are elastic members, such as springs, spring members, etc. Alternatively, the first connector 20 and / or the second connector 30 may include a first segment and a second segment, the first segment and the second segment are connected, and the first segment and the second segment may be plugged, and an elastic member may be arranged between the first segment and the second segment, and the first segment and the second segment are relatively moved by compressing the elastic member by the fixing member 2, so as to achieve the telescopic movement of the first connector 20 and / or the second connector 30. In some embodiments, it is not excluded that a power component may be arranged between the first segment and the second segment, so that the first segment or the second segment is driven to move automatically by the power component.

[0036] It should be noted that the side away from the battery is the side of the battery module end plate away from the end battery in the battery module, that is, along the direction away from the battery module. Figure 1The first connector 20 is disposed at one end of the end plate body 10 in the length direction, and at least a portion of the first connector 20 extends out along a side away from the battery 1, that is, the first connector 20 extends out in a direction away from the battery module. Correspondingly, the second connector 30 is disposed at the other end of the end plate body 10 in the length direction, and at least a portion of the second connector 30 extends out along a side away from the battery 1, and the second connector 30 extends out in a direction away from the battery module.

[0037] In one embodiment, at least one of the first connector 20 and the second connector 30 is integrally formed with the end plate body 10, which can not only ensure structural stability but also improve forming efficiency. The end plate body 10 can be a sheet metal part. The sheet metal part can be made of aluminum, aluminum alloy, steel plate, etc.

[0038] In one embodiment, at least one of the first connecting member 20 and the second connecting member 30 is a cantilever structure, so as to ensure that the first connecting member 20 and / or the second connecting member 30 can be arranged telescopically, thereby eliminating the corresponding tolerance and ensuring reliable locking. The cantilever structure can be a spring sheet, and part of the spring sheet can be arranged compressibly to achieve telescoping.

[0039] In one embodiment, the expansion amount of at least one of the first connector 20 and the second connector 30 is 1 mm-5 mm, which can effectively eliminate the tolerance and avoid the first connector 20 and / or the second connector 30 from being crushed by excessive expansion. The expansion amount of at least one of the first connector 20 and the second connector 30 can be 1 mm, 1.5 mm, 2 mm, 2.3 mm, 3 mm, 3.6 mm, 4 mm, 4.5 mm, 4.8 mm or 5 mm, etc.

[0040] In one embodiment, Figure 2 and Figure 6 As shown, a reinforcing portion 11 is provided on the end plate body 10 to improve the structural strength of the end plate body 10. The reinforcing portion 11 may be a reinforcing rib, for example, a convex structure is formed on the end plate body 10. The convex structure can not only increase the strength, but also serve as a handle during the transportation of the battery module.

[0041] In one embodiment, the end plate body 10 includes a first surface 12 and a second surface 13 perpendicular to the thickness direction of the end plate body 10, and a reinforcing portion 11 may be provided on at least one of the first surface 12 and the second surface 13. The first surface 12 may face the battery 1, and the second surface 13 may face away from the battery 1. In some embodiments, the reinforcing portion 11 may be provided on the second surface 13, and the first surface 12 may not be provided with a protruding structure to avoid occupying the internal space of the battery module.

[0042] In one embodiment, Figure 2 ,Figure 3 , Figure 6 and Figure 7 As shown in Figure 3 , Figure 6 and Figure 7 , the end plate body 10 includes a first surface 12 and a second surface 13 perpendicular to the thickness direction of the end plate body 10. The first surface 12 faces the battery 1, and the second surface 13 faces away from the battery 1. The reinforcing portion 11 is provided on the second surface 13. Among them, the reinforcing portion 11 is a protrusion, and a groove 14 corresponding to the protrusion is provided on the first surface 12. The groove 14 can not only avoid occupying the internal space of the battery module, but also be used for placing other components of the battery module, so as to ensure the reliability of installation, and at the same time provide a buffer space for battery expansion.

[0043] The reinforcing portion 11 and the groove 14 can be formed by stamping the end plate body 10, that is, the groove 14 is formed on the first surface 12, and the protrusion is formed on the corresponding second surface 13. In some embodiments, it is not excluded that the groove 14 is formed by a material removal method.

[0044] In one embodiment, as Figure 2 and Figure 3 shown, there is one reinforcing portion 11 and one corresponding groove 14, which not only has a simple manufacturing process, but also can ensure the structural strength of the end plate body 10.

[0045] In one embodiment, as Figure 6 and Figure 7 shown, the reinforcing portion 11 extends along the length direction of the end plate body 10. Among them, there are at least two reinforcing portions 11, and at least two reinforcing portions 11 are arranged along the width direction of the end plate body 10, so as to ensure the structural strength of the end plate body 10.

[0046] In some embodiments, the reinforcing portion 11 extends along the width direction of the end plate body 10. Among them, there are at least two reinforcing portions 11, and at least two reinforcing portions 11 are arranged along the length direction of the end plate body 10.

[0047] In one embodiment, as Figures 2 to 9 shown, the battery module end plate further includes: a first reinforcing member 40, the first reinforcing member 40 is connected to the first connecting member 20; a second reinforcing member 50, the second reinforcing member 50 is connected to the second connecting member 30; wherein, a part of the first connecting member 20 is movably arranged relative to the first reinforcing member 40, and / or, a part of the second connecting member 30 is movably arranged relative to the second reinforcing member 50. The first reinforcing member 40 and the second reinforcing member 50 can ensure the structural strength of the first connecting member 20 and the second connecting member 30, and can ensure that at least one of the first connecting member 20 and the second connecting member 30 is telescopically arranged along the thickness direction of the end plate body 10. Further, the telescopic amount of the first connecting member 20 and / or the second connecting member 30 can be controlled. The first reinforcing member 40 and the second reinforcing member 50 can both be reinforcing columns. The reinforcing columns can be made of steel.

[0048] In one embodiment, as shown in Figure 4 , Figure 5 , Figure 8 and Figure 9 , the first connecting member 20 is formed with a first cavity 21, the first reinforcing member 40 is located in the first cavity 21, and a side of the first reinforcing member 40 away from the end plate body 10 is spaced from the first connecting member 20, so that the first connecting member 20 is telescopically arranged along the thickness direction of the end plate body 10; and / or, the second connecting member 30 is formed with a second cavity 31, the second reinforcing member 50 is located in the second cavity 31, and a side of the second reinforcing member 50 away from the end plate body 10 is spaced from the second connecting member 30, so that the second connecting member 30 is telescopically arranged along the thickness direction of the end plate body 10. The first reinforcing member 40 and the second reinforcing member 50 can improve the structural strength of the first connecting member 20 and the second connecting member 30, avoid the deformation of the end plate of the battery module due to force, and the spacing between the side of the first reinforcing member 40 away from the end plate body 10 and the first connecting member 20 can ensure that the first connecting member 20 can be compressed, and the distance between the first reinforcing member 40 and the first connecting member 20 can control the telescopic amount of the first connecting member 20, while the spacing between the side of the second reinforcing member 50 away from the end plate body 10 and the second connecting member 30, and the distance between the second reinforcing member 50 and the second connecting member 30 can control the telescopic amount of the second connecting member 30.

[0049] It should be noted that, as shown in Figure 5 and Figure 9 , the first connecting member 20 is formed with a first cavity 21, the second connecting member 30 is formed with a second cavity 31, and there is a certain distance between the free end of the first connecting member 20 and the end plate body 10, so as to ensure that the first connecting member 20 can be telescopic, and there is a certain distance between the free end of the second connecting member 30 and the end plate body 10, so as to ensure that the second connecting member 30 can be telescopic, that is, the first cavity 21 and the second cavity 31 form openings along the width direction of the end plate body 10. Further, the first cavity 21 and the second cavity 31 may each include three openings.

[0050] In one embodiment, the first reinforcing member 40 is welded to the first connecting member 20, and / or the second reinforcing member 50 is welded to the second connecting member 30, which can not only ensure the reliability of the connection, but also improve the assembly efficiency by welding connection.

[0051] In one embodiment, as shown in Figure 4 , Figure 5 , Figure 8 and Figure 9As shown, on one side of the first connecting member 20 facing the battery 1, there is a first recess 22, and at least part of the first weld seam 43 formed by the first reinforcing member 40 and the first connecting member 20 is located within the first recess 22; and / or, on one side of the second connecting member 30 facing the battery 1, there is a second recess 32, and at least part of the second weld seam 53 formed by the second reinforcing member 50 and the second connecting member 30 is located within the second recess 32. The first weld seam 43 being located within the first recess 22 and the second weld seam 53 being located within the second recess 32 can prevent the weld seams from protruding, thereby avoiding occupying the internal space of the battery module and preventing the weld seams from interfering with other structures of the battery module.

[0052] In one embodiment, as Figure 5 and Figure 9 shown, the first reinforcing member 40 is provided with a first protrusion 42, and a recess is formed inside the first connecting member 20, so as to ensure that there is a first recess 22 on the side of the first connecting member 20 facing the battery 1, and the first protrusion 42 is located within the recess. Correspondingly, the second reinforcing member 50 is provided with a second protrusion 52, and a recess is formed inside the second connecting member 30, so as to ensure that there is a second recess 32 on the side of the second connecting member 30 facing the battery 1, and the second protrusion 52 is located within the recess.

[0053] In some embodiments, the first reinforcing member 40 and the first connecting member 20 can be connected by other connection methods, and the second reinforcing member 50 and the second connecting member 30 can be connected by other connection methods. For example, they can be connected by fasteners, or it can be a snap connection or other methods.

[0054] In one embodiment, at least one of the first reinforcing member 40 and the second reinforcing member 50 is provided with a connection through-hole 60, so that the fastener can pass through the connection through-hole 60 to connect the battery module to the battery box body. The connection through-hole 60 can be a round hole, such as a threaded hole. In some embodiments, it is not excluded that the connection through-hole 60 is a clearance hole, such as a round hole, a square hole, a triangular hole or other polygonal holes.

[0055] In one embodiment, at least one end of the first reinforcing member 40 in the height direction protrudes from the first connecting member 20; and / or, at least one end of the second reinforcing member 50 in the height direction protrudes from the second connecting member 30. The protrusion of the first reinforcing member 40 and / or the second reinforcing member 50 not only facilitates the installation of the battery module on the battery box body, but also prevents the end plate body 10, the first connecting member 20 and the second connecting member 30 from being overstressed, thereby avoiding damage to the end plate of the battery module.

[0056] In one embodiment, at least one end of the first reinforcing member 40 in the height direction protrudes from the first connecting member 20 by a length of 0.5 mm - 5 mm; and / or, at least one end of the second reinforcing member 50 in the height direction protrudes from the second connecting member 30 by a length of 0.5 mm - 5 mm, which can not only ensure the reliable connection of the first reinforcing member 40 and / or the second reinforcing member 50 to the battery box body, but also avoid the problem of excessive height of the end plate of the battery module.

[0057] In some embodiments, the first reinforcing member 40 can be connected to the end plate body 10, and the second reinforcing member 50 can be connected to the end plate body 10.

[0058] In one embodiment, a limiting portion is provided on at least one of the first connecting member 20 and the second connecting member 30; wherein, the limiting portion protrudes from the outer surface of the first connecting member 20, and / or the limiting portion protrudes from the outer surface of the second connecting member 30. The limiting portion can limit the cable tie, thereby preventing the cable tie from detaching from the end plate of the battery module.

[0059] The limiting portion can be provided on the retractable part of the first connecting member 20 and / or the second connecting member 30, or the limiting portion can be provided on the non-retractable part of the first connecting member 20 and / or the second connecting member 30.

[0060] In one embodiment, as Figure 4 , Figure 5 , Figure 8 and Figure 9 shown, the limiting portion includes a cantilever protrusion 61, and an avoidance groove 62 is provided on at least one of the first connecting member 20 and the second connecting member 30, and the cantilever protrusion 61 is located in the avoidance groove 62; and / or, the limiting portion includes a limiting post 63. The cantilever protrusion 61 can facilitate the installation of the cable tie on the battery module and can ensure that the cable tie can be clamped after the cable tie is installed, while the limiting post 63 can effectively limit the cable tie to prevent the cable tie from detaching from the end plate of the battery module.

[0061] In some embodiments, at least two cantilever protrusions 61 can be provided on at least one of the first connecting member 20 and the second connecting member 30. During the process of fixing the cable tie to the battery module, the cable tie can compress the cantilever protrusion 61 to facilitate the installation of the cable tie on the battery module, and after the cable tie is installed in place, the cantilever protrusion 61 returns to its original position, so as to ensure that the adjacent two cantilever protrusions 61 can reliably limit the cable tie.

[0062] In some embodiments, at least one of the first connecting member 20 and the second connecting member 30 can be provided with one cantilever protrusion 61 and at least one limiting post 63. In this embodiment, one cantilever protrusion 61 and multiple limiting posts 63 can be provided on the first connecting member 20 and the second connecting member 30. For example, the number of limiting posts 63 can be 3, as Figure 4 andFigure 8 as shown

[0063] In one embodiment, as Figure 5 and Figure 9 shown, a first notch 41 is provided on the first reinforcing member 40, and the avoidance groove 62 provided on the first connecting member 20 can be disposed opposite to the first notch 41. The first notch 41 can extend to opposite ends of the first reinforcing member 40. A second notch 51 is provided on the second reinforcing member 50, and the avoidance groove 62 provided on the second connecting member 30 can be disposed opposite to the second notch 51. The second notch 51 can extend to opposite ends of the second reinforcing member 50. In some embodiments, two sides of the first reinforcing member 40 close to the first notch 41 can be welded to the first connecting member 20, and two sides of the second reinforcing member 50 close to the second notch 51 can be welded to the second connecting member 30.

[0064] It should be noted that the structures of the first reinforcing member 40 and the second reinforcing member 50 can be the same, or the structures of the first reinforcing member 40 and the second reinforcing member 50 can be different. The structures of the first connecting member 20 and the second connecting member 30 can be the same, or the structures of the first connecting member 20 and the second connecting member 30 can be different. In this embodiment, the battery module end plate can be a centrally symmetric structure.

[0065] An embodiment of the present invention further provides a battery module. Please refer to Figures 1 to 9 , the battery module includes the above-mentioned battery module end plate.

[0066] The battery module according to an embodiment of the present invention includes a battery module end plate, and the battery module end plate includes an end plate body 10, a first connecting member 20, and a second connecting member 30. The first connecting member 20 and the second connecting member 30 are respectively disposed at opposite ends in the length direction of the end plate body 10. Since at least one of the first connecting member 20 and the second connecting member 30 is disposed telescopically in the thickness direction of the end plate body 10, when the battery module end plate and the battery are locked by an external component, the installation or manufacturing tolerance can be filled by the telescoping of the first connecting member 20 and / or the second connecting member 30, so as to ensure the fixing effect and thus improve the use performance of the battery module.

[0067] In one embodiment, as Figure 1 shown, the battery module further includes: a battery 1, the battery 1 is located between two opposite battery module end plates; a fixing member 2, the fixing member 2 surrounds the battery module end plate and the battery 1 to fix the battery module end plate and the battery 1; wherein, both the first connecting member 20 and the second connecting member 30 are connected to the fixing member 2, and the fixing member 2 can cause the first connecting member 20 and the second connecting member 30 to telescope, so as to absorb the cumulative tolerance formed by the battery size tolerance and improve the overall strength of the battery module.

[0068] The battery 1 includes a battery cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charging / discharging. The battery cell refers to a unit formed by winding or laminating a stacked portion, and the stacked portion includes a first electrode, a separator, and a second electrode. When the first electrode is the positive electrode, the second electrode is the negative electrode. Among them, the polarities of the first electrode and the second electrode can be interchanged. The battery cell is disposed within a battery housing. A buffer structure may be provided between the batteries 1.

[0069] In one embodiment, the fixing member 2 is a cable tie; wherein, the cable tie includes at least one of a steel strip and a plastic strip, and the cable tie is limited within the limiting portion of the battery module end plate, thereby preventing the cable tie from detaching from the battery module end plate.

[0070] Combined Figure 1 As shown, the cable tie may include a steel strip and a plastic strip. The steel strip may be located between the cantilever protrusion 61 and the limiting post 63, while the plastic strip may be located between the two limiting posts 63. The steel strip can be fixed from top to bottom, thereby compressing the cantilever protrusion 61 during this process, and the plastic strip can be deformed. Therefore, it is very convenient to install and can be installed from bottom to top or from top to bottom.

[0071] In one embodiment, as Figure 1 shown, the battery module further includes: an insulating plate 3, and the insulating plate 3 is located between the battery 1 and the battery module end plate; wherein, connection protrusions are provided on the insulating plate 3, and the connection protrusions cooperate with the grooves 14 of the battery module end plate, which can not only improve the connection strength between the insulating plate 3 and the battery module end plate, but also the grooves 14 can achieve a buffering function, thereby avoiding safety problems caused by the expansion of the battery 1 during the use of the battery module.

[0072] The insulating plate 3 and the battery module end plate may be bonded. The insulating plate 3 is bonded to the end plate body 10. During this process, the first recess 22 and / or the second recess 32 can receive the overflow glue between the insulating plate 3 and the battery module end plate, thereby avoiding the problem of overflow glue leakage. The insulating plate 3 may be made of an insulating material, such as a plastic plate. The insulating plate 3 may also be a plate-like structure coated with an insulating coating, such as alumina (Al 2 O 3 )), zirconia (ZrO 2 ) and other ceramic materials.

[0073] In an embodiment of the present invention, the battery module may include a battery module end plate. A cantilever protrusion 61 and an avoidance groove 62 may be provided on the battery module end plate. The cantilever protrusion 61 is located within the avoidance groove 62, so that the cantilever protrusion 61 can be deformably arranged. The cantilever protrusion 61 may be a hook. Further, limiting posts 63 may be provided on the battery module end plate. The limiting posts 63 are spaced from the cantilever protrusion 61 to limit the cable tie. The limiting posts 63 may be at least two.

[0074] An embodiment of the present invention further provides a battery pack, including the above-mentioned battery module.

[0075] The battery pack according to an embodiment of the present invention includes a battery module. The end plate of the battery module includes an end plate body 10, a first connecting member 20, and a second connecting member 30. The first connecting member 20 and the second connecting member 30 are respectively disposed at opposite ends in the length direction of the end plate body 10. Since at least one of the first connecting member 20 and the second connecting member 30 is disposed to be telescopic in the thickness direction of the end plate body 10, when the end plate of the battery module and the battery are locked by an external component, the installation or manufacturing tolerance can be filled by the telescoping of the first connecting member 20 and / or the second connecting member 30, so as to ensure the fixing effect and thus improve the service performance of the battery pack.

[0076] In one embodiment, the battery pack further includes a battery box body. The battery module is disposed in the battery box body, and at least two battery modules may be disposed in the battery box body. The end plate of the battery module may be connected to the battery box body through a fastening member passing through a connection through hole 60.

[0077] Those skilled in the art will readily conceive of other embodiments of the present disclosure after considering the specification and practicing the inventive concept disclosed herein. The present disclosure is intended to cover any variations, uses, or adaptations of the present invention, which follow the general principles of the present disclosure and include known common knowledge or conventional technical means in the technical field not disclosed herein. The specification and the example embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the appended claims.

[0078] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The protection scope of the present disclosure is only limited by the appended claims.

Claims

1. A battery module end plate, It is characterized in that include: End plate body (10); A first connecting member (20), the first connecting member (20) being arranged at one end of the end plate body (10) in the length direction, and at least a portion of the first connecting member (20) extending out along a side away from the battery (1); A second connecting member (30), the second connecting member (30) being arranged at the other end of the end plate body (10) in the length direction, and at least a portion of the second connecting member (30) extending out along a side away from the battery (1); a first reinforcing member (40), the first reinforcing member (40) being connected to the first connecting member (20), a portion of the first connecting member (20) being movably arranged relative to the first reinforcing member (40), and a connecting through hole (60) being arranged on the first reinforcing member (40); The first connecting member (20) forms a first cavity (21), the first reinforcing member (40) is located in the first cavity (21), and the first reinforcing member (40) is spaced apart from the first connecting member (20) at a side away from the end plate body (10), so that the first connecting member (20) can be telescopically arranged along the thickness direction of the end plate body (10).

2. The battery module end plate according to claim 1, It is characterized in that At least one of the first connecting member (20) and the second connecting member (30) is integrally formed with the end plate body (10).

3. The battery module end plate according to claim 1, It is characterized in that At least one of the first connecting member (20) and the second connecting member (30) is a cantilever structure.

4. The battery module end plate according to claim 1, It is characterized in that The expansion and contraction amount of at least one of the first connecting member (20) and the second connecting member (30) is 1 mm to 5 mm.

5. The battery module end plate according to claim 1, It is characterized in that The end plate body (10) is provided with a reinforcement portion (11).

6. The battery module end plate according to claim 5, It is characterized in that The end plate body (10) comprises a first surface (12) and a second surface (13) perpendicular to the thickness direction of the end plate body (10), the first surface (12) faces the battery (1), the second surface (13) faces away from the battery (1), and the reinforcing portion (11) is arranged on the second surface (13); Wherein, the reinforcing portion (11) is a protrusion, and the first surface (12) is provided with a groove (14) corresponding to the protrusion.

7. The battery module end plate according to claim 6, It is characterized in that The reinforcement portion (11) extends along the length direction of the end plate body (10); There are at least two reinforcing parts (11), and at least two reinforcing parts (11) are arranged along the width direction of the end plate body (10).

8. The battery module end plate according to any one of claims 1 to 7, It is characterized in that The battery module end plate also includes: A second reinforcing member (50), the second reinforcing member (50) being connected to the second connecting member (30); Wherein, a part of the second connecting member (30) is movably arranged relative to the second reinforcing member (50).

9. The end plate of the battery module according to claim 8, Characterized in that The second connecting member (30) forms a second cavity (31), the second reinforcing member (50) is located in the second cavity (31), and a side of the second reinforcing member (50) away from the end plate body (10) is spaced from the second connecting member (30), so that the second connecting member (30) is telescopically arranged along the thickness direction of the end plate body (10).

10. The end plate of the battery module according to claim 8, Characterized in that The first reinforcing member (40) is welded to the first connecting member (20), and / or the second reinforcing member (50) is welded to the second connecting member (30).

11. The end plate of the battery module according to claim 10, Characterized in that A first recess (22) is provided on a side of the first connecting member (20) facing the battery (1), and at least a part of a first weld seam (43) formed by the first reinforcing member (40) and the first connecting member (20) is located in the first recess (22); and / or a second recess (32) is provided on a side of the second connecting member (30) facing the battery (1), and at least a part of a second weld seam (53) formed by the second reinforcing member (50) and the second connecting member (30) is located in the second recess (32).

12. The end plate of the battery module according to claim 8, Characterized in that A connection through hole (60) is provided on the second reinforcing member (50).

13. The end plate of the battery module according to claim 12, Characterized in that At least one end of the first reinforcing member (40) in the height direction protrudes from the first connecting member (20); and / or at least one end of the second reinforcing member (50) in the height direction protrudes from the second connecting member (30).

14. The end plate of the battery module according to claim 13, Characterized in that The length by which at least one end of the first reinforcing member (40) in the height direction protrudes from the first connecting member (20) is 0.5 mm - 5 mm; and / or the length by which at least one end of the second reinforcing member (50) in the height direction protrudes from the second connecting member (30) is 0.5 mm - 5 mm.

15. The end plate of the battery module according to any one of claims 1 to 7, Characterized in that At least one of the first connecting member (20) and the second connecting member (30) is provided with a limiting portion; Wherein, the limiting portion protrudes from the outer surface of the first connecting member (20), and / or the limiting portion protrudes from the outer surface of the second connecting member (30).

16. The end plate of the battery module according to claim 15, Characterized in that The limiting part includes a cantilever protrusion (61), and an avoidance groove (62) is provided on at least one of the first connecting member (20) and the second connecting member (30), and the cantilever protrusion (61) is located in the avoidance groove (62); and / or, the limiting part includes a limiting post (63).

17. The battery module end plate according to any one of claims 1 to 7, characterized in that the second connecting member (30) is provided so as to be telescopic in the thickness direction of the end plate body (10).

18. A battery module, characterized in that it includes the battery module end plate according to any one of claims 1 to 17.

19. The battery module according to claim 18, characterized in that the battery module further includes: a battery (1), and the battery (1) is located between two opposite battery module end plates; a fixing member (2), and the fixing member (2) is disposed around the battery module end plate and the battery (1) to fix the battery module end plate and the battery (1); wherein, both the first connecting member (20) and the second connecting member (30) are connected to the fixing member (2).

20. The battery module according to claim 19, characterized in that the fixing member (2) is a tie strap; wherein, the tie strap includes at least one of a steel strip and a plastic strip, and the tie strap is limited within the limiting part of the battery module end plate.

21. A battery pack, characterized in that it includes the battery module according to any one of claims 18 to 20.

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