Battery module end plate, battery module with battery module end plate and battery pack

Abstract

The utility model discloses a battery module end plate as well as a battery module and a battery pack with the battery module end plate. The battery module end plate comprises an end plate body, the convex rib is connected to the surface of one side, in the first direction, of the end plate body and extends in the second direction, and the first direction is perpendicular to the second direction; the metal insert is embedded in the convex rib, and the battery module end plate is fixedly connected with the battery pack box body through the metal insert. According to the battery module end plate disclosed by the utility model, the convex ribs and the metal inserts embedded in the convex ribs are arranged, so that the overall structural strength of the end plate can be improved, the overall strength of a battery pack can be further improved, meanwhile, the deformation quantity of an external connecting piece when the battery pack is collided can be reduced, and the safety of the battery pack can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery module end plate and a battery module and a battery pack having the same. Background Art

[0002] The research and development and production of electric vehicles are receiving more and more attention. The power battery pack is one of the core components of electric vehicles, which directly affects the power performance and safety of the vehicle. Generally, the collision protection design of the whole pack is to select a higher-strength material for the battery pack shell, or rely on a reinforcing beam to ensure the overall strength of the battery pack. However, in some whole pack designs, due to the space or weight of the whole pack and the overall design scheme, the single selection of high-strength materials or reinforcing beams cannot meet the collision requirements of the whole pack. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a battery module end plate, which can improve the overall strength of the battery pack and reduce the deformation of the external connector when the battery pack is hit, thereby improving the safety of the battery pack.

[0004] According to the first aspect of the utility model, the battery module end plate is used for a battery pack, and the battery module end plate comprises: a shell end plate body; a convex rib, wherein the convex rib is connected to a side surface of the end plate body in a first direction and extends along a second direction, wherein the first direction and the second direction are perpendicular to each other; a metal insert, wherein the metal insert is embedded in the convex rib, and the battery module end plate is fixedly connected to the battery pack case through the metal insert.

[0005] According to the battery module end plate of the utility model, by providing a convex rib and a metal insert embedded in the convex rib, the overall structural strength of the end plate can be increased, thereby improving the overall strength of the battery pack. At the same time, the deformation of the external connecting parts when the battery pack is hit can be reduced, thereby improving the safety of the battery pack.

[0006] According to some embodiments of the utility model, there are multiple convex ribs, and the multiple convex ribs are arranged at intervals along a third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

[0007] According to some embodiments of the utility model, the convex rib includes: two first ribs, the two first ribs extend along the second direction and are arranged at intervals along the third direction; a plurality of second ribs, the plurality of second ribs are arranged between the two first ribs and connected to the two first ribs, the plurality of second ribs extend along the third direction and are arranged at intervals along the second direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; a plurality of third ribs, the plurality of third ribs are arranged on the side of the first rib away from the second rib, the plurality of third ribs extend along the first direction and are connected to the end plate body.

[0008] According to some embodiments of the present invention, in the first direction, the height of the protrusion of the rib is 20 mm-50 mm; and / or, in the third direction, the thickness of the first rib is 2.5 mm-4 mm.

[0009] According to some embodiments of the utility model, a first mounting hole extending along the second direction is formed on the rib, a second mounting hole extending along the second direction is formed on the end plate body, the first mounting hole and the second mounting hole are arranged at intervals along the first direction, and the metal insert includes a first connecting member and a second connecting member, the first connecting member is embedded in the first mounting hole, and the second connecting member is embedded in the second mounting hole.

[0010] According to some embodiments of the utility model, the first connecting member and the second connecting member are both formed in a cylindrical shape, a plurality of first grooves are formed on the outer circumferential wall of the first connecting member, and a plurality of second grooves are formed on the outer circumferential wall of the second connecting member, the plurality of first grooves extend around the circumference of the first connecting member and are arranged at intervals along the axial direction of the first connecting member, and the plurality of second grooves extend around the circumference of the second connecting member and are arranged at intervals along the axial direction of the second connecting member.

[0011] According to some embodiments of the utility model, the first mounting hole is arranged at one end of the rib in the second direction, the first connecting member is embedded in the first mounting hole, the first connecting member is formed as a metal nut, and an oblique knurling structure is formed on the outer side of the nut.

[0012] According to some embodiments of the utility model, the second mounting hole passes through the end plate body along the second direction, the second connecting member is embedded in the second mounting hole, the second connecting member is formed as a metal sleeve, and a plurality of vertical grooves are formed on the outer peripheral wall of the metal sleeve. The plurality of vertical grooves extend along the axial direction of the metal sleeve and are arranged at intervals along the circumference of the metal sleeve.

[0013] A battery module according to a second aspect of the present invention comprises a battery module end plate according to the first aspect of the present invention.

[0014] According to the battery module of the utility model, the battery module end plate of the first aspect is provided, thereby improving the overall performance of the battery module.

[0015] The battery pack according to the third aspect of the present invention comprises a box body, a first adhesive layer and a battery module according to the second aspect of the present invention, wherein the battery module is fixedly connected to the box body via the battery module end plate and the first adhesive layer.

[0016] According to the battery pack of the utility model, the overall performance of the battery pack is improved by providing the battery module of the second aspect.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of a battery pack according to an embodiment of the utility model;

[0019] Figure 2 yes Figure 1 A schematic diagram of a battery module end plate shown in ;

[0020] Figure 3 yes Figure 2 A schematic diagram of a first connecting member shown in ;

[0021] Figure 4 yes Figure 2 Schematic diagram of the second connecting member shown in .

[0022] Reference numerals:

[0023] 1. Battery pack;

[0024] 100. Battery module end plate;

[0025] 10. End plate body;

[0026] 20, convex rib; 21, first rib; 22, second rib; 23, third rib;

[0027] 30. Metal insert; 31. First connecting member; 311. First groove; 312. Oblique knurling; 32. Second connecting member; 321. Second groove; 322. Vertical groove;

[0028] 2000, cabinet. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] Reference below Figure 1-Figure 4 A battery module end plate 100 according to an embodiment of the first aspect of the present invention is described.

[0031] like Figure 2 As shown, the battery module end plate 100 according to the first embodiment of the utility model is used for a battery pack 1, comprising: an end plate body 10, a rib 20 and a metal insert 30, the rib 20 is connected to the end plate body 10 in a first direction (for example Figure 2 and along a second direction (e.g. Figure 2 The metal insert 30 is embedded in the rib 20, and the battery module end plate 100 is fixedly connected to the battery pack body 2000 through the metal insert 30.

[0032] The battery module end plates 100 are generally disposed at both ends of the battery module in the front-to-back direction. The battery module end plates 100 mainly play the role of structural support and resisting the expansion of battery cells.

[0033] Specifically, the end plate body 10 is the main structure of the end plate 100, which can provide installation space and support for multiple electrical components. The convex rib 20 mainly plays the role of a reinforcing rib. The convex rib 20 is arranged on the end plate body 10, which can increase the mechanical strength and bending resistance of the end plate body 10, and further increase the collision resistance of the end plate 100. Therefore, when the front of the battery pack 1 is hit, the impact of the collision on the battery module can be reduced, and further improve the safety performance of the battery pack 1. The metal insert 30 is mainly used to cooperate with the external connector to fix the battery module end plate 100 on the battery pack box 2000, wherein the metal insert 30 can enhance the connection strength between the end plate 100 and the battery pack box 2000, so that on the one hand, the connection stability between the battery module and the battery pack box 2000 can be improved, and on the other hand, when the battery pack 1 is hit by an external collision, the deformation of the external connector when the battery pack 1 is hit can be reduced, and further improve the safety of the battery pack 1.

[0034] According to the battery module end plate 100 of the embodiment of the utility model, by providing the convex rib 20 and the metal insert 30 embedded in the convex rib 20, the overall structural strength of the end plate 100 can be increased, thereby improving the overall strength of the battery pack 1. At the same time, the deformation of the external connector when the battery pack 1 is hit can be reduced, thereby improving the safety of the battery pack 1.

[0035] According to some embodiments of the present invention, Figure 2 As shown, the number of ribs 20 is multiple, and the multiple ribs 20 are arranged along the third direction (eg Figure 2 The convex ribs 20 are arranged in a spaced manner (from left to right as shown), wherein the first direction, the second direction and the third direction are perpendicular to each other. For example, the number of the convex ribs 20 can be two, three or more. Among them, the multiple convex ribs 20 can further increase the strength of the end plate 100, thereby improving the mechanical properties of the end plate 100, and improving the bending resistance and collision resistance of the end plate 100.

[0036] According to some embodiments of the present invention, Figure 2 As shown, the convex rib 20 includes: two first ribs 21, a plurality of second ribs 22 and a plurality of third ribs 23, the two first ribs 21 extending along the second direction and the convex ribs 23 extending along the third direction (for example Figure 2 A plurality of second ribs 22 are arranged between two first ribs 21 and connected to the two first ribs 21, and a plurality of second ribs 22 extend along a third direction and are arranged at intervals along the second direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; a plurality of third ribs 23 are arranged on a side of the first rib 21 away from the second rib 22, and a plurality of third ribs 23 extend along the first direction and are connected to the end plate body 10.

[0037] Specifically, the first rib 21 and the second rib 22 are connected to form a frame structure, wherein the frame structure can improve the strength of the protrusion 20, thereby improving the collision force that the end plate 100 can withstand; at the same time, the frame structure can also reduce the weight of the convex rib 20, thereby improving the structural strength of the end plate 100 while reducing the overall weight of the end plate 100, thereby improving the lightweight of the battery pack 1. A plurality of third ribs 23 connect the convex rib 20 and the end plate body 10, thereby further improving the connection stability of the convex rib 20 and the end plate body 10, enhancing the structural stability of the convex rib 20, and further improving the impact resistance and bending resistance of the end plate 100.

[0038] For example, the number of the second ribs 22 may be two, three or more, and the number of the third ribs 23 may be two, three or more.

[0039] According to some embodiments of the utility model, in the first direction, the height of the protrusion of the rib 20 is 20mm-50mm. For example, in the first direction, the height of the protrusion of the rib 20 can be 20mm, 30mm, 40mm or 50mm. In this way, the height of the protrusion of the rib 20 can be not too small, which is conducive to the arrangement of the metal insert 30 in the rib 20. At the same time, the height of the protrusion of the rib 20 can be not too large, which can improve the mechanical properties of the end plate 100 while reducing the space occupied by the end plate 100 and improving the energy density of the battery pack 1.

[0040] According to some embodiments of the utility model, in the third direction, the thickness of the first rib 21 is 2.5mm-4mm. For example, in the third direction, the thickness of the first rib 21 can be 2.5mm, 3mm, 3.5mm or 4mm. In this way, the thickness of the first rib 21 can be not too thin, thereby improving the overall strength of the convex rib 20 and the connection area with the end plate body 10, which is conducive to ensuring that the convex rib 20 can withstand a large tensile force. At the same time, the thickness of the first rib 21 can be not too thick, thereby reducing the overall size and overall weight of the convex rib 20, which is conducive to ensuring the lightweight of the battery pack 1.

[0041] According to some embodiments of the utility model, a first mounting hole extending along the second direction is formed on the rib 20, a second mounting hole extending along the second direction is formed on the end plate body 10, the first mounting hole and the second mounting hole are arranged at intervals along the first direction, and the metal insert 30 includes a first connecting member 31 and a second connecting member 32, the first connecting member 31 is embedded in the first mounting hole, and the second connecting member 32 is embedded in the second mounting hole. Specifically, the first connecting member 31 and the second connecting member 32 are respectively used to be fixedly connected to the upper box body and the lower box body of the battery pack 1, so that it is conducive to realizing reliable connection and fixation between the end plate 100 and the box body 2000.

[0042] In some specific embodiments, the material of the rib 20 is engineering plastic, and the rib 20 and the metal insert 30 are an integrated structure, which can be manufactured in one go by using the injection molding process. In this way, on the one hand, the two are not easy to separate when subjected to external impact force; on the other hand, there is no gap between the two, so that when either of them is subjected to external force, the two will deform or move synchronously, and the existence of the gap will not cause the two to be subjected to asynchronous or unbalanced force, resulting in friction and wear between the two during long-term use, and then causing the metal insert 30 to loosen and fail relative to the rib 20. In addition, when the injection molding process is used, the processing steps of the end plate 100 can also be reduced, thereby improving the processing efficiency of the end plate 100.

[0043] In other specific embodiments, the end plate 100 is made of metal material, for example, aluminum alloy, magnesium alloy, etc., so that the impact resistance of the end plate 100 can be further improved, thereby increasing the safety of the battery pack 1 in frontal collision.

[0044] According to some embodiments of the present invention, Figure 2-Figure 4 As shown, the first connector 31 and the second connector 32 are both formed into a cylindrical shape, and a plurality of first grooves 311 are formed on the outer peripheral wall of the first connector 31, and a plurality of second grooves 321 are formed on the outer peripheral wall of the second connector 32. The plurality of first grooves 311 extend around the circumference of the first connector 31 and are arranged at intervals along the axial direction of the first connector 31, and the plurality of second grooves 321 extend around the circumference of the second connector 32 and are arranged at intervals along the axial direction of the second connector 32. Specifically, a plurality of annular protrusions are formed in the first mounting hole and the second mounting hole, respectively, and the plurality of protrusions are respectively adapted to the plurality of first grooves 311 and the plurality of second grooves 321, so that the connection strength between the first connector 31 and the second connector 32 and the rib 20 can be further increased, and the pulling force of the first connector 31 and the second connector 32 can be increased, thereby improving the connection stability between the battery module and the box 2000. At the same time, the cylindrical structure is relatively simple, and the manufacturing cost of the metal insert 30 can be reduced. For example, the number of the first groove 311 and the second groove 321 may be two, three or more.

[0045] According to some embodiments of the present invention, Figure 2 and 3 As shown, the first mounting hole is arranged at one end of the rib 20 in the second direction, the first connecting member 31 is embedded in the first mounting hole, the first connecting member 31 is formed as a metal nut, and an oblique knurling 312 structure is formed on the outer side of the nut. Among them, the metal nut has good mechanical properties and connection strength. Therefore, the first connecting member 31 is formed as a metal nut, which can ensure the connection stability between the end plate 100 and the battery pack box 2000. At the same time, the price of the metal nut is relatively low, which can also reduce the overall cost of the end plate 100. Specifically, the oblique knurling 312 is a process for increasing friction and anti-slip effects. Therefore, an oblique knurling 312 structure is formed on the outer side of the nut, which can increase the friction between the nut and the rib 20, and further improve the pulling force between the nut and the rib 20. At the same time, the oblique knurling 312 structure is embedded in the first mounting hole, and can also limit the movement of the nut in the circumferential direction, thereby preventing the nut from rotating when the end plate 100 and the box 2000 are fixed, thereby improving the connection tightness between the end plate 100 and the box 2000.

[0046] According to some embodiments of the present invention, Figure 2 and 4As shown, the second mounting hole passes through the end plate body 10 along the second direction, and the second connecting member 32 is embedded in the second mounting hole. The second connecting member 32 is formed as a metal sleeve, and a plurality of vertical grooves 322 are formed on the outer peripheral wall of the metal sleeve. The plurality of vertical grooves 322 extend along the axial direction of the metal sleeve and are arranged at intervals along the circumference of the metal sleeve. Among them, the plurality of vertical grooves 322 can increase the locking effect when the second connecting member 32 is connected to the rib 20, and at the same time, can also limit the movement of the metal sleeve in the circumferential direction, prevent the metal sleeve from rotating when locking the end plate 100 and the box body 2000, thereby improving the tightness of the connection between the end plate 100 and the box body 2000.

[0047] According to some embodiments of the present invention, the depth of the first groove 311 is 1.5 mm to 2.5 mm in the radial direction of the first connector 31, and the width of the first groove 311 is 2 mm to 3 mm in the axial direction of the first connector 31. In this way, the pulling force of the plastic material of the first connector 31 and the rib 20 after injection molding can be ensured, thereby improving the connection stability between the battery module and the box 2000 and improving the impact resistance of the battery pack 1.

[0048] For example, in the radial direction of the first connecting member 31, the depth of the first groove 311 can be 1.5mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm or 2.5mm; in the axial direction of the first connecting member 31, the width of the first groove 311 can be 2mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm or 3mm.

[0049] According to some embodiments of the utility model, in the radial direction of the second connecting member 32, the depths of the second groove 321 and the vertical groove 322 are both 0.5mm-0.8mm, in the axial direction of the second connecting member 32, the width of the second groove 321 is 1.5mm-3mm, and in the circumferential direction of the second connecting member 32, the width of the vertical groove 322 is 1.5mm-3mm. In this way, the binding force between the second connecting member 32 and the rib 20 can be ensured, and the second connecting member 32 can be prevented from being pulled out by force. At the same time, the second connecting member 32 can be prevented from rotating under force when the end plate 100 and the box body 2000 are locked, thereby improving the tightness of the connection between the end plate 100 and the box body 2000.

[0050] For example, in the radial direction of the second connecting member 32, the depth of the second groove 321 and the vertical groove 322 can be 0.5mm, 0.6mm, 0.7mm or 0.8mm, in the axial direction of the second connecting member 32, the width of the second groove 321 can be 1.5mm, 2.0mm, 2.5mm or 3mm, and in the circumferential direction of the second connecting member 32, the width of the vertical groove 322 can be 1.5mm, 2.0mm, 2.5mm or 3mm.

[0051] The battery module according to the embodiment of the second aspect of the present invention comprises the battery module end plate 100 according to the embodiment of the first aspect of the present invention.

[0052] According to the battery module of the embodiment of the utility model, the battery module end plate 100 of the first embodiment is provided, thereby improving the overall performance of the battery module.

[0053] The battery pack 1 according to the third aspect of the present invention comprises a box body 2000, a first adhesive layer and a battery module according to the second aspect of the present invention, wherein the battery module is fixedly connected to the box body 2000 via a battery module end plate 100 and the first adhesive layer.

[0054] According to the battery pack 1 of the embodiment of the utility model, the overall performance of the battery pack 1 is improved by providing the battery module of the above-mentioned second aspect embodiment.

[0055] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0056] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery module end plate for a battery pack, characterized in that: include: End plate body; A convex rib, the convex rib is connected to a side surface of the end plate body in a first direction and extends along a second direction, the first direction and the second direction being perpendicular to each other; A metal insert is embedded in the convex rib, and the battery module end plate is fixedly connected to the battery pack body through the metal insert.

2. The battery module end plate according to claim 1, characterized in that: There are multiple convex ribs, and the multiple convex ribs are arranged at intervals along the third direction, wherein the first direction, the second direction and the third direction are perpendicular to each other.

3. The battery module end plate according to claim 2, characterized in that: The convex ribs include: two first ribs, the two first ribs extending along the second direction and arranged at intervals along the third direction; a plurality of second ribs, the plurality of second ribs being arranged between two of the first ribs and connected to the two of the first ribs, the plurality of second ribs extending along the third direction and being arranged at intervals along the second direction, wherein the first direction, the second direction and the third direction are perpendicular to each other; A plurality of third ribs are arranged on a side of the first rib away from the second rib, and the plurality of third ribs extend along the first direction and are connected to the end plate body.

4. The battery module end plate according to claim 3, characterized in that: In the first direction, the height of the convex rib is 20 mm-50 mm; and / or, In the third direction, the thickness of the first rib is 2.5 mm-4 mm.

5. The battery module end plate according to claim 1, characterized in that: The convex rib is formed with a first mounting hole extending along the second direction, the end plate body is formed with a second mounting hole extending along the second direction, and the first mounting hole and the second mounting hole are arranged at intervals along the first direction. The metal insert includes a first connecting member and a second connecting member, the first connecting member is embedded in the first mounting hole, and the second connecting member is embedded in the second mounting hole.

6. The battery module end plate according to claim 5, characterized in that: The first connecting member and the second connecting member are both formed in a cylindrical shape, and a plurality of first grooves are formed on the outer circumferential wall of the first connecting member, and a plurality of second grooves are formed on the outer circumferential wall of the second connecting member. The plurality of first grooves extend around the circumference of the first connecting member and are arranged at intervals along the axial direction of the first connecting member, and the plurality of second grooves extend around the circumference of the second connecting member and are arranged at intervals along the axial direction of the second connecting member.

7. The battery module end plate according to claim 6, characterized in that: The first mounting hole is arranged at one end of the convex rib in the second direction, the first connecting member is embedded in the first mounting hole, the first connecting member is formed as a metal nut, and an oblique knurling structure is formed on the outer side of the nut.

8. The battery module end plate according to claim 6, characterized in that: The second mounting hole passes through the end plate body along the second direction, the second connecting member is embedded in the second mounting hole, the second connecting member is formed as a metal sleeve, and a plurality of vertical grooves are formed on the outer peripheral wall of the metal sleeve. The plurality of vertical grooves extend along the axial direction of the metal sleeve and are arranged at intervals along the circumference of the metal sleeve.

9. A battery module, characterized in that: Comprising a battery module end plate according to any one of claims 1-8.

10. A battery pack, characterized in that: It comprises a box body, a first adhesive layer and the battery module according to claim 9, wherein the battery module is fixedly connected to the box body through the battery module end plate and the first adhesive layer.

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