Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, relates to the technical field of battery packs, and aims to solve the problems that each layer of battery core assembly in a plurality of layers of battery core assemblies needs to be provided with a tray and the manufacturing cost is too high in the related art. Each module unit comprises a first battery cell assembly, a second battery cell assembly, a first tray, a second tray and a supporting frame body, the first tray and the second tray are arranged on the two opposite sides of the supporting frame body, the first battery cell assembly is arranged on the side, away from the supporting frame body, of the first tray, and the second battery cell assembly is arranged on the side, away from the supporting frame body, of the second tray. And the second battery cell assembly is arranged on one side, far away from the supporting frame body, of the second tray.

Description

Technical Field

[0001] The present application relates to the technical field of battery packs, and in particular to a battery module and a battery pack. Background Art

[0002] The double-layer 46xx large cylindrical MTP battery system can make full use of the Z-direction space (larger Z-direction size). The product will be widely used in passenger cars, SUVs and commercial vehicles. In the related technology, in the multi-layer battery cell assembly, each layer of the battery cell assembly needs to be provided with a tray assembly. For example, in the double-layer battery cell assembly, a tray assembly is usually provided under each layer of the battery cell assembly to relieve the pressure at the bottom of each layer of the battery cell assembly. In this way, the tray assembly cannot be fully utilized and is relatively redundant, which makes the material cost and manufacturing cost of the tray high, thereby increasing the manufacturing cost of the entire battery pack. Utility Model Content

[0003] In view of this, the present application provides a battery module and a battery pack to improve the problem in the related art that each layer of multi-layer battery cell assembly requires a tray, resulting in excessively high costs.

[0004] The technical solution adopted by this application to solve the above technical problems is:

[0005] In a first aspect, the present application provides a battery module, comprising at least one module unit, wherein the module unit comprises a first battery cell assembly, a second battery cell assembly, a first tray, a second tray and a supporting frame, wherein the first tray and the second tray are arranged on opposite sides of the supporting frame, the first battery cell assembly is arranged on a side of the first tray away from the supporting frame, and the second battery cell assembly is arranged on a side of the second tray away from the supporting frame.

[0006] In some embodiments of the present application, the first tray, the second tray and the support frame together form a first pressure relief chamber.

[0007] In some embodiments of the present application, a support column is further included, wherein the support column is used to support the support frame, and a second pressure relief chamber is provided on the support column, and the first pressure relief chamber and the second pressure relief chamber are connected.

[0008] In some embodiments of the present application, the second tray is disposed between the support column and the support frame, and a first sealing member is provided between the support column and the second tray.

[0009] In some embodiments of the present application, the first sealing member is sandwiched between the first tray and the supporting frame, and between the second tray and the supporting frame.

[0010] In some embodiments of the present application, the support frame includes a plurality of frame bars, the plurality of frame bars are sequentially connected to enclose a receiving cavity, the first tray includes a first tray body and a first edge arranged around the tray body, the first edge is arranged on a side surface of the support frame, and the first tray body is embedded in the receiving cavity;

[0011] The second tray comprises a second tray body and a second edge arranged around the tray body, the second edge is arranged on the other side surface of the supporting frame, and the second tray body is embedded in the accommodating cavity.

[0012] In some embodiments of the present application, the first tray is provided with a plurality of first pressure relief holes for adapting to the plurality of battery cells in the first battery cell assembly, and the second tray is provided with a plurality of second pressure relief holes for adapting to the plurality of battery cells in the second battery cell assembly.

[0013] In some embodiments of the present application, the first battery cell assembly and the second battery cell assembly are further provided with integrated busbars, respectively. The integrated busbars are respectively located on the side of the first battery cell assembly and the second battery cell assembly facing away from the tray.

[0014] In some embodiments of the present application, the first pressure relief hole and the second pressure relief hole are staggered with each other.

[0015] In some embodiments of the present application, a reinforcing plate is provided inside the support frame to separate the tray and the first pressure relief cavity in the support frame, and a third pressure relief hole is provided on the reinforcing plate.

[0016] In a second aspect, the present application provides a battery pack, comprising a battery module and a box as described in any one of the above items, wherein the battery module is disposed in the box.

[0017] In some embodiments of the present application, the first tray, the second tray and the support frame together form the first pressure relief chamber, the battery pack further includes a support column, the support column is used to support and connect the support frame and the box body, the support column is provided with a second pressure relief chamber, and the first pressure relief chamber and the second pressure relief chamber are connected.

[0018] In some embodiments of the present application, a third pressure relief chamber is further provided on the side wall of the box body, and the first pressure relief chamber, the second pressure relief chamber and the third pressure relief chamber are connected in sequence.

[0019] In summary, due to the adoption of the above technical solution, this application has at least the following beneficial effects:

[0020] A battery module and a battery pack provided by the present application, in an embodiment of the present application, the first battery cell assembly and the second battery cell assembly are respectively mounted on the first tray and the second tray on two sides away from the support frame, and then the first tray and the second tray are assembled on the support frame, and the pressure relief chambers inside the first tray and the second tray are connected with the pressure relief channel inside the support frame, which can reduce the cost of the entire battery module, simplify the assembly process, and save assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments are briefly introduced below. Obviously, the drawings described below only relate to some embodiments of the present application, but are not intended to limit the present application, wherein:

[0022] Figure 1 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0023] Figure 2 A cross-sectional schematic diagram of a battery module provided in an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0025] Figure 4 A cross-sectional schematic diagram of a battery pack provided in an embodiment of the present application.

[0026] The reference numerals are as follows:

[0027] 1. Module unit; 11. First battery cell assembly; 12. Second battery cell assembly; 2. First tray; 21. First tray body; 22. First edge; 23. First pressure relief hole; 3. Second tray; 31. Second tray body; 32. Second edge; 33. Third pressure relief hole; 4. Support frame; 41. Frame bar; 42. Reinforcement plate; 421. Third pressure relief hole; 5. First pressure relief chamber; 6. Support column; 7. Second pressure relief chamber; 8. First seal; 100. Box; 101. Third pressure relief chamber. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0029] In the description of this application, it should be understood that the words "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0030] In this application, the word "exemplary" is used to mean "used as an example, illustration, or description". Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The following description is given to enable any technician in the field to implement and use the present application. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can be implemented without using these specific details. In other instances, known structures and processes are not elaborated in detail to avoid obscuring the description of the present application with unnecessary details. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest scope consistent with the principles disclosed in this application.

[0031] See also Figure 1 and Figure 2 As shown, Figure 1 A schematic diagram of the structure of a battery module provided in an embodiment of the present application is shown in FIG. Figure 2 A cross-sectional schematic diagram of a battery module provided in an embodiment of the present application. In the first aspect, the present application provides a battery module, comprising at least one module unit 1, the module unit 1 comprising a first battery cell assembly 11, a second battery cell assembly 12, a first tray 2, a second tray 3 and a support frame 4, the first tray 2 and the second tray 3 are arranged on opposite sides of the support frame 4, the first battery cell assembly 11 is arranged on a side of the first tray 2 away from the support frame 4, and the second battery cell assembly 12 is arranged on a side of the second tray 3 away from the support frame 4.

[0032] It can be understood that the first battery cell assembly 11 and the second battery cell assembly 12 are respectively arranged on opposite sides of the first tray 2 and the second tray 3, so that the first battery cell assembly 11 and the second battery cell assembly 12 share a pressure relief chamber, so that there is no need to additionally set up a tray and a pressure relief chamber for the second battery cell assembly 12, thereby saving costs and simplifying the installation process, and improving the assembly efficiency of the module unit 1.

[0033] Beneficial effects of the embodiments of the present application: The embodiments of the present application can reduce the cost of the entire battery module, simplify the assembly process, and save assembly efficiency by respectively assembling the first battery cell assembly 11 and the second battery cell assembly 12 on the two sides of the first tray 2 and the second tray 3 away from the support frame 4, and then assembling the first tray 2 and the second tray 3 on the support frame 4.

[0034] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, the first tray 2, the second tray 3 and the support frame 4 enclose a first pressure relief chamber 5.

[0035] It can be understood that the first tray 2, the second tray 3 and the support frame 4 enclose the first pressure relief chamber 5, which can allow the hot pressurized gas inside the first pressure relief chamber 5 to disperse from the inner side of the support frame 4, thereby increasing the pressure relief efficiency of the first pressure relief chamber 5.

[0036] See also Figure 1 and Figure 2 As shown, some embodiments of the present application further include a support column 6, which is used to support the support frame 4. A second pressure relief chamber 7 is provided on the support column 6, and the first pressure relief chamber 5 and the second pressure relief chamber 7 are connected.

[0037] It can be understood that the battery module of the embodiment of the present application also includes a support column 6, in which a second pressure relief chamber 7 is provided and connected to the first pressure relief chamber 5, so that the battery module can be supported by the support column 6 without causing squeezing and damage to the first battery cell assembly 11 and the second battery cell assembly 12 on the battery module.

[0038] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, the second tray 3 is disposed between the support column 6 and the support frame 4 , and a first sealing member 8 is provided between the support column 6 and the second tray 3 .

[0039] It can be understood that the second tray 3 is arranged between the support column 6 and the support frame 4, and a first seal 8 is provided between the support column 6 and the second tray 3 to prevent gas leakage between the support column 6 and the second tray 3 after installation, thereby avoiding adverse effects on the surrounding areas of the battery cells.

[0040] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, a first sealing member 8 is sandwiched between the first tray 2 and the supporting frame 4, and between the second tray 3 and the supporting frame 4, respectively.

[0041] It is understandable that a first seal 8 is sandwiched between the first tray 2 and the support frame 4, and between the second tray 3 and the support frame 4, so that gas is not easily leaked between the first tray 2, the second tray 3 and the support frame 4 after installation, thereby avoiding adverse effects on the surrounding sides of the battery cells.

[0042] See 2 and Figure 3 As shown, in some embodiments of the present application, the support frame 4 includes a plurality of frame bars 41, and the plurality of frame bars 41 are sequentially connected to enclose and form a receiving cavity, the first tray 2 includes a first tray body 21 and a first edge 22 arranged around the first tray body 21, the first edge 22 is arranged on a side surface of the support frame 4, and the first tray body 21 is embedded in the receiving cavity;

[0043] The second tray 3 comprises a second tray body 31 and a second edge 32 arranged around the second tray body 31 . The second edge 32 is arranged on the other side surface of the support frame 4 . The second tray body 31 is embedded in the accommodating cavity.

[0044] It can be understood that the support frame 4 is configured with a plurality of frame bars 41 to enclose a receiving cavity, so that the hot pressurized gas between the first tray 2 and the second tray 3 can be dispersed from all directions, thereby improving the pressure reduction efficiency.

[0045] It can be understood that the first tray 2 and the second tray 3 are respectively provided with the first edge 31 and the second edge 32 , so that the first tray 2 and the second tray 3 can be fixed to the support frame 4 more stably.

[0046] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, the first tray 2 is provided with a plurality of first pressure relief holes 23 for adapting to a plurality of battery cells in the first battery cell assembly 11 , and the second tray 3 is provided with a plurality of second pressure relief holes 33 for adapting to a plurality of battery cells in the second battery cell assembly 12 .

[0047] It can be understood that the first tray 2 and the second tray 3 constitute a first pressure relief chamber 5, the first battery cell assembly 11 is arranged on the first tray 2, and the second battery cell assembly 12 is arranged on the second tray 3, so that the first battery cell assembly 11 and the second battery cell assembly 12 share a first pressure relief chamber 5, so there is no need to set a first pressure relief chamber 5 for each battery cell assembly, thereby saving the cost of the entire battery module.

[0048] See also Figure 2 and Figure 3 In some embodiments of the present application shown, the first battery cell assembly 11 and the second battery cell assembly 12 are further provided with integrated busbars 9 , respectively. The integrated busbars 9 are respectively located on the side of the first battery cell assembly 11 and the second battery cell assembly 12 facing away from the tray 2 .

[0049] It can be understood that an integrated busbar 9 is also provided on the first battery cell assembly 11 and the second battery cell assembly 12. The integrated busbar 9 is arranged on the side of the first battery cell assembly 11 and the second battery cell assembly 12 away from the first tray 2 or the second tray 3 to facilitate the assembly of the integrated busbar 9 on its surface after the first battery cell assembly 11 and the second battery cell assembly 12 are installed on the first tray 2 or the second tray 3, thereby improving the assembly efficiency of the integrated entire battery module.

[0050] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, the first pressure relief hole 23 and the second pressure relief hole 33 are staggered with each other.

[0051] It is understandable that the first pressure relief hole 23 and the second pressure relief hole 33 are respectively arranged on the first tray 2 and the second tray 3, but if the first pressure relief hole 23 and the second pressure relief hole 33 are arranged opposite to each other, it is easy for the battery cell on the first pressure relief hole 23 to affect the battery cell on the second pressure relief hole 33 during the process of thermal runaway pressure relief. Therefore, the first pressure relief hole 23 and the second pressure relief hole 33 are relatively staggered. It is possible to minimize the impact of the pressure relief hole on one side on the pressure relief hole on the other side during the process of thermal runaway and pressure relief of a certain battery cell, such as breaking the mica sheet on the pressure relief hole on the other side.

[0052] See also Figure 1 and Figure 2 As shown, in some embodiments of the present application, a reinforcing plate 42 is provided inside the support frame 4 to separate the tray 2 and the first pressure relief chamber 5 in the support frame 4 , and a third pressure relief hole 421 is provided on the reinforcing plate 42 .

[0053] It can be understood that a reinforcing plate 42 is provided inside the support frame 4, and a third pressure relief hole 421 is provided on the reinforcing plate 42. The third pressure relief hole 421 is used to connect the gas inside the first pressure relief chamber 5 to the inside of the support frame 4. In this way, the supporting strength of the support frame 4 can be guaranteed, so that the support frame 4 is not easily damaged by the impact of the hot and pressurized gas in the first pressure relief chamber 5. At the same time, the load-bearing capacity of the support frame 4 for the first tray 2, the second tray 3, the first battery cell assembly 11 and the second battery cell assembly 12 can be guaranteed.

[0054] See also Figure 3 and Figure 4 As shown, Figure 3 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application is shown in FIG. Figure 4 A cross-sectional schematic diagram of a battery pack provided in an embodiment of the present application. In a second aspect, the present application provides a battery pack, comprising a battery module as described above and a box 100 , wherein the battery module is disposed in the box 100 .

[0055] Since the battery module in the embodiment of the present application can improve the problem in the related art that each layer of multi-layer battery cell assemblies requires a tray, which results in high cost, the battery pack including the battery module also has the same technical effect, which will not be elaborated here.

[0056] See also Figure 3 and Figure 4 As shown, in some embodiments of the present application, the first tray 2, the second tray 3 and the support frame 4 enclose a first pressure relief chamber 5, and the battery pack also includes a support column 6, which is used to support and connect the support frame 4 and the box body 100. The support column 6 is provided with a second pressure relief chamber 7, and the first pressure relief chamber 5 and the second pressure relief chamber 7 are connected.

[0057] It can be understood that connecting the battery module and the box body 100 through the support column 6 can enable the battery module to be stably fixed to the box body 100 through the support frame 4, and also has a certain supporting effect on the battery module, so that the integrated busbars 9 on both sides of the battery module are suspended relative to the inner wall of the box body, thereby preventing the integrated busbars 9 on both sides of the battery module from collision and improving the service life.

[0058] See also Figure 3 and Figure 4 As shown, in some embodiments of the present application, a third pressure relief chamber 101 is further provided on the side wall of the box body 100, and the first pressure relief chamber 5, the second pressure relief chamber 7 and the third pressure relief chamber 101 are connected in sequence.

[0059] It can be understood that a third pressure relief chamber 101 is provided on the side wall of the box body 100, and the first pressure relief chamber 5, the second pressure relief chamber 7 and the third pressure relief chamber 101 are connected in sequence, so that the hot pressure relief gas in the first pressure relief chamber 5 can be discharged through the third pressure relief chamber 101 in the box body 100 without affecting the normal operation of the module unit 1 in the box body 100.

[0060] The basic concepts have been described above. Obviously, for those skilled in the art, the above detailed disclosure is only for example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary embodiments of the present application.

[0061] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0062] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus help understand one or more application embodiments, in the above description of the embodiments of this application, multiple features are sometimes merged into one embodiment, figure or description thereof. However, this disclosure method does not mean that the features required by the object of this application are more than the features mentioned in the claims. In fact, the features of the embodiments are less than all the features of the single embodiment disclosed above.

[0063] Each patent, patent application, patent application publication, and other materials, such as articles, books, specifications, publications, documents, etc., cited in this application is hereby incorporated by reference in its entirety, except for application history documents that are inconsistent with or conflicting with the content of this application, and documents that limit the broadest scope of the claims of this application (currently or later attached to this application). It should be noted that if the descriptions, definitions, and / or use of terms in the attached materials of this application are inconsistent or conflicting with the content of this application, the descriptions, definitions, and / or use of terms in this application shall prevail.

Claims

1. A battery module, characterized in that: The invention comprises at least one module unit (1), wherein the module unit (1) comprises a first battery cell assembly (11), a second battery cell assembly (12), a first tray (2), a second tray (3) and a support frame (4), wherein the first tray (2) and the second tray (3) are arranged on opposite sides of the support frame (4), the first battery cell assembly (11) is arranged on a side of the first tray (2) away from the support frame (4), and the second battery cell assembly (12) is arranged on a side of the second tray (3) away from the support frame (4).

2. The battery module according to claim 1, characterized in that: The first tray (2), the second tray (3) and the support frame (4) enclose a first pressure relief chamber (5).

3. The battery module according to claim 2, characterized in that: It also comprises a support column (6), wherein the support column (6) is used to support the support frame (4), a second pressure relief chamber (7) is provided on the support column (6), and the first pressure relief chamber (5) and the second pressure relief chamber (7) are in communication.

4. The battery module according to claim 3, characterized in that: The second tray (3) is arranged between the support column (6) and the support frame (4), and a first sealing member (8) is provided between the support column (6) and the second tray.

5. The battery module according to claim 4, characterized in that: The first sealing member (8) is respectively sandwiched between the first tray (2) and the supporting frame (4), and between the second tray (3) and the supporting frame (4).

6. The battery module according to claim 1, characterized in that: The support frame (4) comprises a plurality of frame bars (41), wherein the plurality of frame bars (41) are connected in sequence to enclose a receiving cavity, the first tray (2) comprises a first tray body (21) and a first edge (22) arranged around the first tray body (21), the first edge (22) being arranged on a side surface of the support frame (4), and the first tray body (21) being embedded in the receiving cavity; The second tray (3) comprises a second tray body (31) and a second edge (32) arranged around the second tray body (31); the second edge (32) is arranged on the other side surface of the support frame (4); and the second tray body (31) is embedded in the accommodating cavity.

7. The battery module according to any one of claims 1 to 6, characterized in that: The first tray (2) is provided with a plurality of first pressure relief holes (23) for adapting to a plurality of battery cells in the first battery cell assembly (11), and the second tray (3) is provided with a plurality of second pressure relief holes (33) for adapting to a plurality of battery cells in the second battery cell assembly (12).

8. According to claim 1 - The battery module according to any one of claims 6, characterized in that The first battery cell assembly (11) and the second battery cell assembly (12) are also respectively provided with an integrated busbar (9), and the integrated busbar (9) is respectively located on a side of the first battery cell assembly (11) and the second battery cell assembly (12) facing away from the tray (2).

9. The battery module according to claim 7, characterized in that: The first pressure relief hole (23) and the second pressure relief hole (33) are staggered with each other.

10. The battery module according to claim 2 or 3, characterized in that: A reinforcing plate (42) is provided inside the support frame (4) for separating the tray (2) and the first pressure relief chamber (5) inside the support frame (4), and a third pressure relief hole (421) is provided on the reinforcing plate (42).

11. A battery pack, characterized in that: It comprises a battery module and a box (100) as claimed in any one of claims 1 to 10, wherein the battery module is arranged in the box (100).

12. The battery pack according to claim 11, characterized in that: The first tray (2), the second tray (3) and the support frame (4) enclose the first pressure relief chamber (5), and the battery pack further comprises the support column (6), the support column (6) is used to support and connect the support frame (4) and the box body (100), and the support column (6) is provided with a second pressure relief chamber (7), and the first pressure relief chamber (5) and the second pressure relief chamber (7) are connected.

13. The battery pack according to claim 12, characterized in that: A third pressure relief chamber (101) is also provided on the side wall of the box body (100), and the first pressure relief chamber (5), the second pressure relief chamber (7) and the third pressure relief chamber (101) are sequentially connected.

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