End plate structure, battery module and battery pack

Abstract

The utility model provides an end plate structure, a battery module and a battery pack. The end plate structure comprises an end plate main body and a foaming body, the end plate main body comprises a plate-shaped main body part and end parts spliced at the two ends of the main body part respectively, the two end parts and the main body part define a mounting space, and connecting parts used for being connected with an external carrier are arranged on the end parts; the foaming body is arranged in the installation space, and the outer side of the foaming body can abut against the battery cell. According to the end plate structure, the main body part is spliced with the two end parts, and the foaming body is arranged, so that the end plate structure can be processed and formed easily, the weight of the whole end plate structure can be reduced, and the production cost can be reduced easily.

Description

Technical Field

[0001] The utility model relates to the technical field of power batteries, and in particular to an end plate structure. At the same time, the utility model also relates to a battery module provided with the end plate structure, and a battery pack provided with the battery module. Background Art

[0002] At present, the side panels on both sides of the battery module are generally made of aluminum alloy, and the end plates at both ends of the battery module are generally made of aluminum extruded profiles. However, with the development of battery cells in the industry, the size of battery cells is getting larger and longer, which increases the weight of the end plates, which is not conducive to reducing production costs. At the same time, the increase in battery cell specifications also makes aluminum extruded profiles difficult or impossible to manufacture in some cases. The end plates need to be die-cast, and the mold cost is very expensive, and the processing cycle is long. In addition, the end plates made of aluminum extruded profiles are not conducive to the expansion of the battery cells when they are matched with the battery cells, thereby affecting the performance of the battery cells at the ends of the battery module. Utility Model Content

[0003] In view of this, the utility model aims to provide an end plate structure to facilitate processing and forming, and to reduce weight and production costs.

[0004] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0005] An end plate structure comprises an end plate body and a foam body;

[0006] The end plate body comprises a plate-shaped main body part and end parts respectively spliced ​​at both ends of the main body part, the two end parts and the main body part enclose an installation space, and the end parts are provided with a connection part for connecting with an external carrier;

[0007] The foam body is arranged in the installation space, and the outer side of the foam body can abut against the battery core.

[0008] Furthermore, a guide portion is provided between the main body portion and the foam body, and the guide portion is used to guide the foam body to be pressed into the installation space along the thickness direction of the main body portion.

[0009] Furthermore, the guide portion includes at least two guide posts provided on one side of the main body, and guide holes provided on the foam body and capable of being inserted into the guide posts in a one-to-one correspondence;

[0010] And the guide column in the installed state is accommodated in the corresponding guide hole.

[0011] Furthermore, at least one end portion thereof is provided with a limiting protrusion protruding into the installation space, and corresponding to the limiting protrusion, an overlapping protrusion is provided on the corresponding side of the foam body;

[0012] The overlapping protrusion in the installed state overlaps the limiting protrusion.

[0013] Furthermore, a first notch communicating with the installation space is provided on the top of the main body;

[0014] The top of the foam body is provided with a convex block filled in the first notch, or the top of the foam body is provided with a second notch corresponding to the first notch.

[0015] Further, the foam body and the end plate body are bonded to each other; and / or,

[0016] The foamed body is made of MPPE foamed material or EPP foamed material.

[0017] Furthermore, the main body portion is provided with a middle portion located between the two end portions;

[0018] The middle part divides the installation space into two installation parts, and each installation part is provided with the foam body; and / or,

[0019] The end plate body is made of alloy material.

[0020] Furthermore, the middle portion is also provided with a connection portion for connecting to an external carrier.

[0021] Compared with the prior art, the utility model has the following advantages:

[0022] The end plate structure described in the utility model is connected by splicing the main body and the two end parts, and the arrangement of the foam body, which is not only conducive to the processing and forming of the end plate structure, but also can reduce the weight of the entire end plate structure, thereby helping to reduce production costs.

[0023] In addition, the provision of the guide portion facilitates guiding the foam body to be pressed into the installation space, thereby improving the installation effect of the foam body in the installation space. The guide column and the guide hole have a simple structure, and the cooperation of the two has a good guiding effect. The provision of the limiting protrusion and the overlapping protrusion can limit the installation of the foam body, which is conducive to ensuring that the foam body is installed in place. The provision of the first notch and the second notch is conducive to further reducing the weight of the end plate structure, thereby helping to reduce production costs; the provision of the first notch and the protrusion is conducive to further improving the connection effect between the foam body and the end plate body.

[0024] In addition, the foam body is bonded to the end plate body, which is conducive to improving the connection strength between the two, thereby improving the stability of the foam body; the foam body is made of MPPE foam material or EPP foam material, which is conducive to structural molding and has good flame retardant properties, which is conducive to improving the safety of the end plate structure. The middle part is set to improve the strength of the end plate structure; the end plate body is made of alloy material, which is conducive to improving the strength of the end plate structure. A connection part is also set on the middle part to improve the connection firmness of the end plate structure on the external carrier.

[0025] In addition, another object of the utility model is to propose a battery module, comprising two side plates arranged opposite to each other, a plurality of battery cells located between the two side plates and arranged side by side, and end plates respectively connected to the ends of the two side plates, and the end plates are of the end plate structure as described above, and the foam body is arranged toward the battery cells.

[0026] The battery module of the utility model is beneficial to reducing the production cost of the battery module by arranging the end plate structure as described above, and has good practicality.

[0027] In addition, the present invention further provides a battery pack, in which the battery module as described above is provided.

[0028] The battery pack described in the present invention has the same beneficial effects as the above-mentioned battery module, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0030] Figure 1 This is a disassembled diagram of the end plate structure described in Example 1 of the utility model;

[0031] Figure 2 This is a schematic structural diagram of the end structure described in Embodiment 1 of the utility model at one viewing angle;

[0032] Figure 3 This is a schematic structural diagram of the end structure described in Embodiment 1 of the utility model at one viewing angle;

[0033] Figure 4 It is a structural schematic diagram of the end plate structure when a protrusion is arranged on the foam body described in Example 1 of the utility model.

[0034] Description of reference numerals:

[0035] 1. End plate body; 2. Foam body;

[0036] 101, main body; 102, end portion; 1021, limiting protrusion; 103, first notch; 104, connecting hole; 105, guide column; 1051, weight reduction groove;

[0037] 201, bump; 202, second notch; 203, overlapping protrusion; 204, guide hole. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0039] In the description of the present invention, it should be noted that if there are terms indicating orientation or positional relationship such as "upper", "lower", "inner", "back", etc., they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first", "second", etc., they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0041] Embodiment 1

[0042] This embodiment relates to an end plate structure, which is intended to facilitate processing and forming while also helping to reduce weight and production costs.

[0043] In terms of overall structure, the end plate structure includes an end plate body 1 and a foam body 2. The end plate body 1 includes a plate-shaped main body 101 and end parts 102 respectively spliced ​​at both ends of the main body 101. The two end parts 102 and the main body 101 enclose an installation space, and the end parts 102 are provided with a connection part for connecting to an external carrier. The foam body 2 is arranged in the installation space, and the outer side of the foam body 2 can abut against the battery cell.

[0044] The end plate structure of this embodiment, through the splicing of the main part 101 and the two end parts 102, and the arrangement of the foam body 2, is not only conducive to the processing and forming of the end plate structure, but also can reduce the weight of the entire end plate structure, thereby helping to reduce production costs.

[0045] Based on the above overall introduction, an exemplary structure of the end plate structure described in this embodiment is as follows: Figures 1 to 3As shown in . The two end portions 102 are extended along the height direction of the main portion 101 and are arranged on the same side of the main portion 101. In specific implementation, as a preference, the end plate main body 1 is made of alloy material, and the end portions 102 are respectively welded to the two ends of the main portion 101. For example, the end plate main body 1 is made of alloy materials such as aluminum alloy or magnesium alloy, which not only has good structural strength, but also facilitates the lightweight setting of the end plate main body 1. The two end portions 102 can be welded to the main portion 101 by using the CMT welding process, which is beneficial to improving the structural strength of the end plate main body 1 and the reliability during use.

[0046] It should be noted that the end plate body 1 in this embodiment can be made of other materials besides alloy material. The end portion 102 can be connected to the main portion 101 by plug-in, snap-on or screw connection, etc., as long as it can ensure that the end portion 102 can be spliced ​​with the main portion 101 to form the end plate body 1.

[0047] As a preferred embodiment, a guide portion is provided between the main body 101 and the foam body 2, and the guide portion is used to guide the foam body 2 to be pressed into the installation space along the thickness direction of the end plate main body 1. The guide portion is provided here to facilitate guiding the foam body 2 to be pressed into the installation space, thereby improving the installation effect of the foam body 2 in the installation space.

[0048] In terms of specific structure, Figure 1 As shown in , the guide portion includes two guide posts 105 provided on one side of the main body 101, and guide holes 204 provided on the foam body 2 and capable of being inserted into the guide posts 105 in a one-to-one correspondence, and the guide posts 105 in the installed state are accommodated in the corresponding guide holes 204. When the foam body 2 is pressed into the installation space, the guide posts 105 can be inserted into the corresponding guide holes 204, so that the foam body 2 can only move along the thickness direction of the end plate body 1, and then be installed in the installation space.

[0049] In addition, the guide column 105 in the installed state is located in the guide hole 204, which is beneficial to avoid the contact between the guide column 105 and the battery cell, thereby facilitating the expansion of the battery cell. In this embodiment, the guide column 105 and the guide hole 204 have simple structures, and the guiding effect of the two is good. In order to reduce the weight of the guide column 105, a weight reduction groove 1051 is provided on each guide column 105. Of course, in the specific implementation, the number and position of the guide column 105 and the guide hole 204 can also be determined according to the use requirements.

[0050] like Figure 1 and Figure 2As shown in , both end portions 102 are provided with limiting protrusions 1021 protruding into the installation space, and corresponding to the limiting protrusions 1021, overlapping protrusions 203 are provided on the corresponding sides of the foam body 2, and the overlapping protrusions 203 in the installed state overlap the limiting protrusions 1021. Here, the setting of the limiting protrusions 1021 and the overlapping protrusions 203 can limit the installation of the foam body 2, which is conducive to ensuring that the foam body 2 is installed in place.

[0051] In this embodiment, the outer side surface of the foam body 2 in the installed state is flush with the corresponding surface of the end portion 102 to ensure the fit between the end plate structure and the battery cell. It should be noted that it is also feasible to set the limiting protrusion 1021 only on one end portion 102. In this case, the abutting protrusion on the foam body 2 and the limiting protrusion 1021 can be set correspondingly.

[0052] As a preferred embodiment, Figure 1 As shown in the figure, the top of the main body 101 is provided with a first notch 103 connected to the installation space, and the top of the foam body 2 is provided with a second notch 202 corresponding to the first notch 103. The shapes of the first notch 103 and the second notch 202 are adapted to each other, which is conducive to reducing the weight of the end plate body 1, thereby helping to reduce the production cost, and the structures of the first notch 103 and the second notch 202 are simple and easy to process and shape.

[0053] It should be noted that if Figure 4 As shown in , the top of the foam body 2 may not be provided with the second notch 202, but with a convex block 201 filled in the first notch 103. At this time, the cooperation between the convex block 201 and the first notch 103 is conducive to improving the connection strength between the end plate body 1 and the foam body 2.

[0054] Furthermore, the foam body 2 in this embodiment is bonded to the end plate body 1. For example, a colloid is provided on the end plate body 1 or the foam body 2, and the two are bonded to each other by the colloid, which is beneficial to improve the connection reliability between the end plate body 1 and the foam body 2 and is easy to arrange and implement.

[0055] The foam body 2 in this embodiment is made of MPPE foam material or EPP foam material in the prior art. The foam body 2 prepared in this way not only has a good supporting effect, but also has a UL94-V0 flame retardant effect, which is beneficial to improve the safety of the end plate structure.

[0056] In addition, in this embodiment, a middle part located between the two end parts 102 can be provided on the main part 101, and the middle part divides the installation space into two installation parts, and each installation part is provided with a foam body 2. In specific implementation, the middle part is also extended along the height direction of the end plate main body 1, and a limiting protrusion 1021 can also be provided on the middle part to abut and cooperate with the overlapping protrusion 203 on each foam body 2. The provision of the middle part here is conducive to improving the structural strength of the end plate main body 1.

[0057] As a preferred embodiment, the middle part is also provided with a connection part for connecting with an external carrier. Such a configuration is conducive to improving the connection firmness of the end plate structure on the external carrier. As a structural example of the connection part, the connection part in this embodiment is a connection hole 104 set through the end part 102 and the middle part. The bolt passes through the corresponding connection hole 104 and is screwed to the threaded hole on the external component, thereby completing the fixation of the end plate structure on the external carrier.

[0058] The end plate structure in this embodiment is conducive to reducing production costs by optimizing the processing method of the end plate body 1 and the coordination of the end plate body 1 and the foam body 2, and can achieve large-area molding to meet the use requirements of large-size batteries. In addition, the foam body 2 is in contact with the battery cell, which can also facilitate the expansion and deformation of the end battery cell, thereby not only reducing the force on the end plate body 1, but also improving the use performance of the end battery cell.

[0059] Embodiment 2

[0060] The present embodiment relates to a battery module, comprising two side plates arranged opposite to each other, a plurality of battery cells located between the two side plates and arranged side by side, and end plates respectively connected to the ends of the two side plates, and the end plates are the end plate structures in the first embodiment, and the foam body 2 is arranged toward the battery cells.

[0061] In terms of specific structure, in order to improve the connection effect between the end plate and the battery cell, the end portion 102 and the foam body 2 are both bonded and connected to the battery cell at the same end. As for the connection relationship between other components in the battery module, all can be referred to the existing technology and will not be repeated here.

[0062] The battery module in this embodiment, by providing the end plate structure as described above, is conducive to reducing the production cost of the battery module and has good practicality.

[0063] In addition, the present embodiment also relates to a battery pack, in which the above battery module is provided.

[0064] The battery pack of this embodiment has the same beneficial effects as the above-mentioned battery module, which will not be described in detail here.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An end plate structure, Features: It includes an end plate body and a foam body; The end plate body comprises a plate-shaped main body part and end parts respectively spliced ​​at both ends of the main body part, the two end parts and the main body part enclose an installation space, and the end parts are provided with a connection part for connecting with an external carrier; The foam body is arranged in the installation space, and the outer side of the foam body can abut against the battery core.

2. The end plate structure according to claim 1, Features: A guide portion is provided between the main body and the foam body, and the guide portion is used to guide the foam body to be pressed into the installation space along the thickness direction of the main body.

3. The end plate structure according to claim 2, Features: The guide portion includes at least two guide posts provided on one side of the main body, and guide holes provided on the foam body and capable of being inserted into the guide posts in a one-to-one correspondence; And the guide column in the installed state is accommodated in the corresponding guide hole.

4. The end plate structure according to claim 1, Features: At least one end portion thereof is provided with a limiting protrusion protruding into the installation space, and corresponding to the limiting protrusion, a lap protrusion is provided on the corresponding side of the foam body; The overlapping protrusion in the installed state overlaps the limiting protrusion.

5. The end plate structure according to claim 1, Features: A first notch communicating with the installation space is provided on the top of the main body; The top of the foam body is provided with a convex block filled in the first notch, or the top of the foam body is provided with a second notch corresponding to the first notch.

6. The end plate structure according to claim 1, Features: The foam body and the end plate body are bonded together; and / or, The foamed body is made of MPPE foamed material or EPP foamed material.

7. The end plate structure according to any one of claims 1 to 6, Features: The main body portion is provided with a middle portion located between the two end portions; The middle part divides the installation space into two installation parts, and each installation part is provided with the foam body; and / or, The end plate body is made of alloy material.

8. The end plate structure according to claim 7, Features: The middle part is also provided with a connection portion for connecting with an external carrier.

9. A battery module, Features: It includes two side plates arranged opposite to each other, a plurality of battery cells located between the two side plates and arranged side by side, and an end plate connected to the ends of the two side plates, wherein the end plate is an end plate structure as described in any one of claims 1 to 8, and the foam body is arranged toward the battery cells.

10. A battery pack, Features: The battery pack is provided with the battery module as claimed in claim 9.

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