Battery module end plate, battery module and domain control battery pack

Abstract

The present application discloses a battery module end plate, a battery module and a domain control battery pack. The battery module end plate includes: an end plate body, including a first surface and a second surface opposite to each other, the end plate body including a support portion, the support portion is located on the first surface; a cover plate, arranged on one side of the end plate body, and abutting against the support portion, the cover plate, the support portion and the first surface enclose a receiving space; a heat insulating portion, arranged in the receiving space. In the battery module end plate, the battery module and the domain control battery pack disclosed in the present application, when the domain controller generates heat, the heat insulating portion will absorb the heat and block the heat from being conducted to the battery cell, thereby reducing the influence of heat on the battery cell, and further extending the service life of the battery cell.

Description

Technical Field

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

[0002] The domain controller can be used to connect to the server of the corresponding network. For example, the domain controller can be used in smart cars to control different functions through signal transmission between the domain controller corresponding to different functions and the central processor. For the purpose of lightweight design, the domain controller will be integrated with the corresponding battery pack to form a domain-controlled battery pack. However, the domain controller will generate heat when working, which will become a heat source in the battery pack, causing the temperature of some cells in the battery pack to rise, affecting the service life of the cells. Summary of the invention

[0003] The embodiments of the present application provide a battery module end plate, a battery module and a domain control battery pack, which can block heat from being conducted to the battery cells, thereby extending the service life of the battery cells.

[0004] In the first aspect, an embodiment of the present application provides a battery module end plate, comprising: an end plate body, comprising a first surface and a second surface opposite to each other, the end plate body comprising a support portion, the support portion being located on the first surface; a cover plate, arranged on one side of the end plate body and abutting against the support portion, the cover plate, the support portion and the first surface enclose a storage space; and a heat insulation portion, arranged in the storage space.

[0005] According to an embodiment of the first aspect of the present application, the end plate body also includes an installation positioning hole, which passes through the first surface and the second surface; the cover plate includes a through hole, and in the plane where the cover plate is located, the orthographic projection of the through hole overlaps with the orthographic projection of the installation positioning hole.

[0006] According to an embodiment of the first aspect of the present application, the end plate body further includes a protrusion, the protrusion is located on the first surface, and the protrusion passes through the through hole; the installation positioning hole passes through the protrusion.

[0007] According to the embodiment of the first aspect of the present application, along the thickness direction of the end plate body, the distance from the end surface of the support portion away from the second surface to the first surface is H1, the distance from the end surface of the protrusion portion away from the second surface to the first surface is H2, and the thickness of the cover plate is h, wherein H2≥H1+h.

[0008] According to an embodiment of the first aspect of the present application, 1mm≤h≤2mm.

[0009] According to the embodiment of the first aspect of the present application, the heat insulation part is made of a phase change material, and the phase change temperature of the phase change material is 30-35°C.

[0010] According to an embodiment of the first aspect of the present application, the support portion includes at least two first sub-portions and at least two second sub-portions, the first sub-portions extend along a first direction, the second sub-portions extend along a second direction, the first direction and the second direction intersect, and both are perpendicular to the thickness direction of the end plate body; at least two first sub-portions, at least two second sub-portions, the first surface and the cover plate enclose a receiving space.

[0011] According to an embodiment of the first aspect of the present application, the end plate body further includes a connecting portion, the connecting portion is arranged at an edge of the first surface, and the edge of the cover plate is sealingly connected to the connecting portion.

[0012] In a second aspect, an embodiment of the present application provides a battery module, comprising: a battery module end plate of an embodiment of the first aspect of the present application; and a plurality of battery cells, arranged on a side of the end plate body facing away from the cover plate.

[0013] In the third aspect, an embodiment of the present application provides a domain-controlled battery pack, comprising: a hollow battery pack case; a domain controller, disposed at one end of the battery pack case along a first reference direction; the domain controller comprises a power supply assembly and a battery cut-off assembly, and the power supply assembly and the battery cut-off assembly are located in the battery pack case; the battery module of the embodiment of the second aspect of the present application is disposed in the battery pack case; along the first reference direction, the battery cell is located on the side of the battery module end plate facing away from the power supply assembly.

[0014] In the battery module end plate, battery module and domain control battery pack provided by the embodiment of the present application, a support portion is provided on the first surface of the end plate body of the battery module end plate, the cover plate abuts against the support portion, the cover plate, the support portion and the first surface are enclosed to form a receiving space, and the heat insulation portion is filled in the receiving space. When the domain controller generates heat, the heat insulation portion absorbs the heat and blocks the heat from being conducted to the battery cell, thereby reducing the influence of the heat on the battery cell and thus extending the service life of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a structural schematic diagram of a battery module end plate of an embodiment of the present application.

[0017] Figure 2 It is a schematic diagram of an exploded part of a battery module end plate of an embodiment of the present application.

[0018] Figure 3 It is a structural schematic diagram of the end plate body of the battery module end plate of an embodiment of the present application.

[0019] Figure 4 yes Figure 1 A cross-sectional view of the battery module end plate of an embodiment of the present application at section AA.

[0020] Figure 5 It is a structural schematic diagram of a battery module according to an embodiment of the present application.

[0021] Figure 6 It is a structural schematic diagram of the domain control battery pack of an embodiment of the present application.

[0022] Reference numerals:

[0023] 1. end rod body; 11. first surface; 12. second surface; 13. support portion; 131. first sub-portion; 132. second sub-portion; 14. positioning and mounting hole; 15. raised portion; 16. connecting portion;

[0024] 2. Cover plate; 21. Through hole;

[0025] 3. Insulation part;

[0026] 100. Battery pack box;

[0027] 200, domain controller;

[0028] 300, battery module; 310, battery module end plate; 320, battery cell;

[0029] X, first direction; Y, second direction; A, first reference direction. DETAILED DESCRIPTION

[0030] The features and exemplary embodiments of various aspects of the application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the application. However, it is obvious to those skilled in the art that the application can be implemented when some details in these specific details are not needed. The following description of the embodiments is only to provide a better understanding of the application by illustrating the example of the application.

[0031] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The embodiments will be described in detail below in conjunction with the accompanying drawings.

[0032] Relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device. In the absence of further restrictions, the elements defined by the statement "comprising ..." do not exclude the presence of additional identical elements in the process, method, article, or device that includes the elements.

[0033] It should be understood that when describing the structure of a component, when a layer or a region is referred to as being "on" or "over" another layer or another region, it may mean that it is directly on the other layer or another region, or that other layers or regions are included between it and the other layer or another region. Moreover, if the component is turned over, the layer or a region will be "below" or "beneath" another layer or another region.

[0034] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0035] It should be understood that in the embodiment of the present application, "B corresponding to A" means that B is associated with A, and B can be determined according to A. However, it should also be understood that determining B according to A does not mean determining B only according to A, and B can also be determined according to A and / or other information.

[0036] The applicant found that for lightweight design, the domain controller and the corresponding battery pack will be integrated together to form a domain control battery pack, which can be used in the automotive field. In the battery pack box, the battery cells and the components of the domain controller are separated by end plates. The domain controller generates heat when it is working. For example, the insulated gate bipolar transistor (IGBT), on-board charger (OBC), DC-to-DC converter (DCDC) and other devices in the circuit will generate heat when working. The domain controller becomes a heat source in the domain control battery pack, and the heat generated will be conducted to the battery cell through the end plate, causing the temperature of the battery cell to rise by 2 to 5°C, affecting the operation of the battery cell and shortening the service life of the battery cell.

[0037] In view of the above analysis, the applicant proposed a battery module end plate, a battery module and a domain control battery pack. The battery module end plate includes an end plate body, a cover plate and a heat insulation part. The support part of the end plate body is located on the first surface of the end plate body. The cover plate abuts against the support part, so that the cover plate, the support part and the first surface enclose a receiving space, and the heat insulation part is arranged in the receiving space. When the domain controller generates heat, the heat insulation part absorbs the heat and blocks the heat from being conducted to the battery cell, thereby reducing the influence of the heat on the battery cell and extending the service life of the battery cell.

[0038] Figure 1 It is a structural schematic diagram of a battery module end plate of an embodiment of the present application. Figure 2 It is a schematic diagram of an exploded part of a battery module end plate of an embodiment of the present application.

[0039] See also Figure 1 and Figure 2 The embodiment of the present application provides a battery module end plate 310, including: an end plate body, including a first surface 11 and a second surface 12 opposite to each other, the end plate body including a support portion 13, the support portion 13 is located on the first surface 11; a cover plate 2, arranged on one side of the end plate body, and abutting against the support portion 13, the cover plate 2, the support portion 13 and the first surface 11 enclose a receiving space; and a heat insulating portion 3, arranged in the receiving space.

[0040] The battery module end plate 310 of the embodiment of the present application is applied to the battery module, and the battery cells of the battery module can be arranged on the same side of the battery module end plate 310 of the embodiment of the present application. When the battery module is arranged in the domain control battery pack, the battery module end plate of the embodiment of the present application can separate the battery cells from the domain controller.

[0041] The end plate body is in the shape of a plate, and has a first surface 11 and a second surface 12 relative to each other. The first surface 11 is provided with a support portion 13 for supporting the cover plate 2. The cover plate 2 is buckled on the support portion 13 and abuts against the support portion 13. The cover plate 2, the support portion 13 and the first surface 11 are enclosed to form a receiving space, and the heat insulation portion 3 is arranged in the receiving space. The first surface 11 and the cover plate 2 form the bottom surface and the top surface of the receiving space, and the support portion 13 is enclosed to form the side wall of the receiving space, and the heat insulation portion 3 is enclosed in the receiving space. The heat insulation portion 3 can be made of a material with low thermal conductivity, or a material with strong heat absorption capacity, or it can absorb heat by changing the properties of the material. Therefore, the heat insulation portion 3 can absorb the heat generated when the domain controller is working, making it difficult for the heat to be transferred to the battery cell, thereby maintaining the temperature of the battery cell within a reasonable range and reducing the influence of heat on the service life of the battery cell.

[0042] Furthermore, the heat insulating part 3 is made of a phase change material, and the phase change temperature of the phase change material is 30-35°C.

[0043] In the embodiment of the present application, the insulation part 3 can be made of phase change material. When the domain controller of the domain control battery pack generates heat, the insulation part 3 can absorb a large amount of heat and change its own physical properties, while keeping the temperature of the insulation part 3 at the phase change temperature. Considering that the insulation part 3 is used to hinder the temperature rise of the battery cell, the phase change temperature of the insulation part 3 should be close to the ideal operating temperature of the battery cell. Considering that the ideal operating temperature range of the battery cell is 15 to 35°C, illustratively, the phase change temperature of the phase change material can be 30 to 35°C. In addition, the insulation part 3 is filled in the accommodation space. When the phase change occurs, the volume of the insulation part 3 should not change significantly. illustratively, the insulation part 3 can be made of a secondary phase change material.

[0044] Figure 3 It is a structural schematic diagram of the end plate body of the battery module end plate of an embodiment of the present application.

[0045] For further information, see Figure 3 , and combined with Figure 1 and Figure 2 The end plate body also includes an installation positioning hole, which passes through the first surface 11 and the second surface 12; the cover plate 2 includes a through hole 21, and in the plane where the cover plate 2 is located, the orthographic projection of the through hole 21 overlaps with the orthographic projection of the installation positioning hole.

[0046] The installation positioning hole is used to install the battery module end plate 310 of the embodiment of the present application in the domain control battery pack. The installation positioning hole runs through the first surface 11 and the second surface 12, and can be used as a wiring through hole between the domain controller and the battery cell. In the plane where the cover plate 2 is located, the orthographic projection of the through hole 21 of the cover plate 2 overlaps with the orthographic projection of the installation positioning hole, so that the through hole 21 of the cover plate 2 is connected to the installation positioning hole, so as to facilitate the wiring between the domain controller and the battery cell to pass through, and also facilitate the installation of the installation positioning member. Exemplarily, the installation positioning member can be a bolt or a pin, which passes through the installation positioning hole and the through hole 21.

[0047] Further, see Figure 1 and Figure 2 The end plate body further includes a protrusion 15 , which is located on the first surface 11 and passes through the through hole 21 ; the mounting positioning hole passes through the protrusion 15 .

[0048] The installation positioning hole passes through the raised portion 15 of the end plate body, that is, the raised portion 15 forms the side wall of the installation positioning hole. The raised portion 15 passes through the through hole 21, so that the installation positioning hole and the accommodating space are not connected, and the heat insulation part 3 arranged in the accommodating space will basically not leak from the installation positioning hole. Therefore, the heat insulation part 3 can be made of a material with a certain fluidity, thereby expanding the choice of materials for the heat insulation part 3, and different materials can be used according to different insulation requirements. At the installation positioning hole, the raised portion 15 (the side wall of the installation positioning hole), the cover plate 2, the first surface 11 and the support portion 13 enclose a accommodating space to accommodate the heat insulation part 3.

[0049] Figure 4 yes Figure 1 A cross-sectional view of the battery module end plate of an embodiment of the present application at section AA.

[0050] For further information, see Figure 4 , and combined with Figures 1 to 3 Along the thickness direction of the end plate body, the distance from the end surface of the support portion 13 away from the second surface 12 to the first surface 11 is H1, the distance from the end surface of the protrusion 15 away from the second surface 12 to the first surface 11 is H2, and the thickness of the cover plate 2 is h, where H2≥H1+h.

[0051] After the battery module end plate 310 of the embodiment of the present application is installed, the end surface of the raised portion 15 away from the second surface 12 protrudes from the side surface of the cover plate 2 away from the first surface 11, that is, H2≥H1+h. Considering that the installation positioning hole is provided on the raised portion 15, the raised portion 15 protrudes from the cover surface, which can provide sufficient installation positioning space for the installation positioning hole, so as to facilitate the connection of other components of the domain control battery pack, and also facilitate the wiring of the domain control battery pack, and reduce the impact of the cover plate 2 on the use of the installation positioning hole. Exemplarily, 1mm≤h≤2mm, if the thickness of the cover plate 2 is too small, the structural strength of the cover plate 2 is reduced, and the sealing ability of the heat insulation part 3 is deteriorated; if the thickness of the cover plate 2 is too large, then the manufacturing cost of the battery module end plate 310 of the embodiment of the present application will be increased, and the heat insulation ability of the battery module end plate 310 of the embodiment of the present application will not be significantly improved.

[0052] Further, see Figures 1 to 3 The support portion 13 includes at least two first sub-portions 131 and at least two second sub-portions 132. The first sub-portion 131 extends along a first direction X, and the second sub-portion 132 extends along a second direction Y. The first direction X and the second direction Y intersect and are both perpendicular to the thickness direction of the end plate body. The at least two first sub-portions 131, the at least two second sub-portions 132, the first surface 11 and the cover plate 2 enclose a receiving space.

[0053] The first sub-section 131 extends along the first direction X and is arranged along the second direction Y, and the second sub-section 132 extends along the second direction Y and is arranged along the first direction X. Considering that the cover plate 2 abuts against the support portion 13, the first sub-section 131 and the second sub-section 132 can provide uniform support for the cover plate 2, thereby improving the structural strength of the battery module end plate 310 of the embodiment of the present application. In addition, the two first sub-sections 131 and the two second sub-sections 132 can form a quadrilateral, which can increase the surface of the heat insulation portion 3, which is beneficial for the heat insulation portion 3 to absorb heat, and improve the heat insulation portion 3 The absorption rate of the heat generated by the domain controller, thereby reducing the impact of heat on the battery cell. The first sub-section 131 and the second sub-section 132 can be an integrated structure, which can reduce the difficulty of making the end plate body. When the first direction X and the second direction Y are perpendicular, the two first sub-sections 131 and the two second sub-sections 132 can form a rectangle, which is also beneficial for the processing and manufacturing of the end plate body.

[0054] Further, see Figures 1 to 3 The end plate body further includes a connecting portion 16 , which is disposed at an edge of the first surface 11 , and an edge of the cover plate 2 is sealed and connected to the connecting portion 16 .

[0055] The connection portion 16 is disposed at the edge of the first surface 11, and the edge of the cover plate 2 is connected to the connection portion 16. At the edge of the battery module end plate 310 in the embodiment of the present application, the cover plate 2, the first surface 11, the support portion 13 and the connection portion 16 can also enclose a receiving space. Through the connection portion 16, the end plate body and the cover plate 2 can be connected as a whole, which facilitates the installation of the battery module end plate 310 in the embodiment of the present application in the domain control battery pack.

[0056] Figure 5 It is a structural schematic diagram of a battery module according to an embodiment of the present application.

[0057] See also Figure 5 , the embodiment of the present application further provides a battery module 300, including the battery module end plate 310 of the aforementioned embodiment of the present application; a plurality of battery cells 320, which are arranged on the side of the end plate body away from the cover plate 2. The battery module 300 can be installed in a domain control battery pack or in an ordinary battery pack. When there is a heat source in the battery pack, the battery module 300 of the embodiment of the present application can be used, so that the battery module end plate 310 faces the heat source to block the heat generated by the heat source from being conducted to the battery cell 320, thereby protecting the battery cell 320.

[0058] Figure 6 It is a structural schematic diagram of the domain control battery pack of an embodiment of the present application.

[0059] See also Figure 6The embodiment of the present application also provides a domain-controlled battery pack, including: a hollow battery pack case 100; a domain controller 200, arranged at one end of the battery pack case 100 along a first reference direction A; the domain controller 200 includes a power supply component and a battery cut-off component, and the power supply component and the battery cut-off component are located in the battery pack case 100; the battery module 300 of the aforementioned embodiment of the present application is arranged in the battery pack case 100; along the first reference direction A, the battery cell 320 is located on the side of the battery module end plate 310 away from the power supply component.

[0060] In the embodiment of the present application, the domain controller 200 can be used in a smart car, and different functions are controlled by signal transmission between the domain controller 200 and the central processing unit corresponding to different functions. The power supply assembly is used to control the battery module 300, and the battery cut-off assembly is used to cut off the power supply of the battery module 300. The power supply assembly and the battery cut-off assembly are located in the battery pack case 100 to protect the power supply assembly and the battery cut-off assembly. When the domain controller 200 is working, the power supply assembly and the battery cut-off assembly will generate heat. The battery module end plate 310 of the battery module 300 faces the power supply assembly and the battery cut-off assembly, which can block the heat generated by the power supply assembly and the battery cut-off assembly from being conducted to the battery cell 320, thereby protecting the battery cell 320 and extending the service life of the battery cell 320.

[0061] In summary, the embodiments of the present application provide a battery module end plate, a battery module, and a domain control battery pack, wherein a support portion is provided on the first surface of the end plate body of the battery module end plate, the cover plate abuts against the support portion, the cover plate, the support portion, and the first surface enclose a receiving space, and the heat insulating portion is filled in the receiving space. When the domain controller generates heat, the heat insulating portion absorbs the heat and blocks the heat from being conducted to the battery cell, thereby reducing the influence of the heat on the battery cell, thereby extending the service life of the battery cell.

[0062] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A battery module end plate, characterized in that: include: An end plate body, comprising a first surface and a second surface opposite to each other, wherein the end plate body comprises a support portion, and the support portion is located on the first surface; A cover plate, disposed on one side of the end plate body and abutting against the support portion, wherein the cover plate, the support portion and the first surface enclose a receiving space; The heat insulation part is arranged in the accommodating space.

2. The battery module end plate according to claim 1, characterized in that: The end plate body further comprises an installation positioning hole, and the installation positioning hole passes through the first surface and the second surface; The cover plate comprises a through hole, and in the plane where the cover plate is located, the orthographic projection of the through hole overlaps with the orthographic projection of the installation positioning hole.

3. The battery module end plate according to claim 2, characterized in that: The end plate body further includes a protrusion, the protrusion is located on the first surface, and the protrusion passes through the through hole; the installation positioning hole passes through the protrusion.

4. The battery module end plate according to claim 3, characterized in that: Along the thickness direction of the end plate body, the distance from the end surface of the support portion away from the second surface to the first surface is H1, the distance from the end surface of the protrusion portion away from the second surface to the first surface is H2, and the thickness of the cover plate is h, where H2≥H1+h.

5. The battery module end plate according to claim 4, characterized in that: 1mm≤h≤2mm.

6. The battery module end plate according to claim 1, characterized in that: The heat insulation part is made of phase change material, and the phase change temperature of the phase change material is 30-35°C.

7. The battery module end plate according to claim 1, characterized in that: The supporting portion includes at least two first sub-portions and at least two second sub-portions, the first sub-portions extend along a first direction, the second sub-portions extend along a second direction, the first direction and the second direction intersect, and both are perpendicular to the thickness direction of the end plate body; at least two first sub-portions, at least two second sub-portions, the first surface and the cover plate enclose the accommodating space.

8. The battery module end plate according to claim 1, characterized in that: The end plate body further includes a connecting portion, which is disposed at an edge of the first surface, and an edge of the cover plate is sealed and connected to the connecting portion.

9. A battery module, characterized in that: include: The battery module end plate according to any one of claims 1 to 8; A plurality of battery cells are arranged on a side of the end plate body away from the cover plate.

10. A domain control battery pack, characterized in that: include: Hollow battery pack box; A domain controller is arranged at one end of the battery pack case along the first reference direction; the domain controller comprises a power supply component and a battery cut-off component, and the power supply component and the battery cut-off component are located in the battery pack case; The battery module described in claim 9 is arranged in the battery pack box; along the first reference direction, the battery cell is located on the side of the battery module end plate away from the power supply assembly.

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