Battery module pressing plate structure and battery pack

Abstract

The utility model provides a battery module pressing plate structure and a battery pack. The utility model relates to a battery module pressing plate structure, which comprises a plate main body, a pressing plate and a pressing plate, the plate main body is of a rectangular plate-shaped structure, and the bottom surface of the plate main body is arranged towards the top of a battery module; the plate main body extends outwards to form the mounting part; and the mounting part is connected with a lower shell of the battery pack so as to restrain the battery module between the plate main body and the lower shell. According to the battery module pressing plate structure disclosed by the utility model, through the arrangement of the plate main body and the mounting part, when the plate main body is connected with the lower shell of the battery pack through the mounting part, the battery module can be stably fixed on the lower shell, so that the battery module is prevented from being separated from the lower shell, and the fixing effect of the battery module is improved; therefore, the use quality of the battery pack is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a pressing plate structure for a battery module. The utility model also relates to a battery pack provided with the above pressing plate structure for a battery module. Background Art

[0002] With the national planning and support for the development of the new energy vehicle industry, and the continuous increase in the market retention of new energy vehicles, pure electric or hybrid vehicles are becoming more and more popular in people's lives. Among them, the battery pack, as the core component of an electric vehicle, is mainly used to provide power for the new energy vehicle to continue driving. At the same time, the safety and structural strength of the battery pack have attracted more and more attention, and the improvement of the safety of the battery pack has always been the focus of the industry.

[0003] Generally, the battery pack mainly includes a housing, and a plurality of battery modules are provided in the housing. Each battery module can output electric energy to the outside of the battery pack, and each battery module is carried and fixed on the lower housing of the battery pack. During the driving of the vehicle, due to the long-term vibration and impact on the battery pack, the housing of the battery pack is prone to slight deformation. At this time, the battery module is easily separated from the lower housing due to vibration, making it difficult to effectively fix the battery module. After the battery module is separated from the lower housing, the battery module is easily knocked against the housing inside the battery pack, resulting in abnormal noise of the battery pack, and it is easy to cause damage to the battery module itself or other electrical components in the battery pack due to the knocking, resulting in a decline in the performance of the battery pack, and even leading to accidents. Therefore, improving the fixing effect of the battery module to avoid the separation of the battery module from the lower housing is particularly crucial for improving the use quality of the battery pack. Summary of the Utility Model

[0004] In view of this, the utility model aims to propose a pressing plate structure for a battery module to improve the fixing effect of the battery module, thereby improving the use quality of the battery pack.

[0005] To achieve the above object, the technical solution of the utility model is realized as follows:

[0006] A pressing plate structure for a battery module includes: a plate body, which is in a rectangular plate shape, and the bottom surface of the plate body faces the top of the battery module; a mounting portion, which extends outward from the plate body; the mounting portion is connected to the lower housing of the battery pack to confine the battery module between the plate body and the lower housing.

[0007] Further, at least one of the mounting portions is provided at each of the two opposite ends of the plate body.

[0008] Further, a plurality of avoidance portions are formed in the plate body, and the pole columns of the battery modules penetrate through the avoidance portions and extend to the top of the plate body. Further, the avoidance portion includes a strip-shaped avoidance hole and / or a notch formed by recessing the edge of the plate body.

[0009] Further, a weight reduction structure is provided on the plate body, and the weight reduction structure includes a cross-shaped weight reduction hole.

[0010] Further, the plate body includes two plate segments arranged at intervals; at least one of the mounting portions is provided at two opposite ends of each plate segment along the length direction or the width direction.

[0011] Further, each of the mounting portions includes an extension portion formed by bending and extending downward from the plate body, and a mounting platform formed by horizontally extending the extension portion away from the plate body; each mounting platform is fixedly connected to each cross beam of the lower housing through a connecting member.

[0012] Further, the connecting member is a bolt.

[0013] Further, the top of the plate body and the battery module are adhesively connected.

[0014] Compared with the prior art, the present utility model has the following advantages:

[0015] For the battery module pressing plate structure of the present utility model, through the arrangement of the plate body and the mounting portion, when the plate body is connected to the lower housing of the battery pack through the mounting portion, the battery module can be stably fixed on the lower housing, avoiding the separation of the battery module from the lower housing, improving the fixing effect of the battery module, and thus improving the use quality of the battery pack.

[0016] By arranging the mounting portions at both ends of the plate body, the number of mounting portions is increased, ensuring uniform stress on the plate body, improving the connection strength between the battery module pressing plate and the lower housing, and thus improving the fixing effect on the battery module.

[0017] Through the arrangement of the avoidance portion, the plate body can be closely attached to the tops of the battery modules, and at the same time, the pole columns of the battery modules extend to the top of the plate body, facilitating connection with the copper busbar, thereby improving the fixing effect of the plate body on the battery module. At the same time, the avoidance portion includes an avoidance hole and a notch, which is beneficial to the processing and forming of the avoidance portion.

[0018] The plate body is provided with a weight reduction structure, including a weight reduction hole. Through the arrangement of the weight reduction hole, the weight of the battery module pressing plate structure can be reduced, thereby reducing the overall weight of the battery pack and improving the use quality of the battery pack.

[0019] The plate body includes two plate segments arranged at intervals, and a plurality of mounting parts are provided at two opposite ends of the plate segments, which can further increase the number of mounting parts, thereby improving the connection strength between the battery module pressing plate and the lower housing, and further improving the fixing effect on the battery module.

[0020] The mounting part includes an extension part and a mounting platform, which can stably connect the plate body to the lower housing, thereby improving the connection effect of the mounting part.

[0021] The connecting piece uses a bolt, which has good connection strength, thereby improving the connection effect between the mounting part and the lower housing. At the same time, the bolt is detachably arranged, which can facilitate the maintenance of the battery module pressing plate structure and the battery module.

[0022] The plate body is adhesively connected to the top of the battery module, which can fill the gap between the bottom of the plate body and the top of the battery module, so that the plate body is closely attached to the battery module, avoiding abnormal noise caused by the plate body knocking against the battery module due to vibration.

[0023] Another object of the present invention is to provide a battery pack, in which the battery module pressing plate structure as described above is provided.

[0024] The battery pack and / or the battery module pressing plate structure described in the present invention have the same technical effects as the prior art, and will not be elaborated here. Description of the Drawings

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 It is a schematic diagram of the overall structure of the battery module pressing plate structure according to Embodiment 1 of the present invention;

[0027] Figure 2 It is a schematic diagram of a structure of an implementation manner of the battery module pressing plate structure according to Embodiment 1 of the present invention;

[0028] Figure 3 It is a schematic diagram of another implementation manner of the battery module pressing plate structure according to Embodiment 1 of the present invention;

[0029] Figure 4 It is an exploded view of the battery module pressing plate structure according to Embodiment 1 of the present invention assembled on the lower housing;

[0030] Description of the Reference Numerals:

[0031] 1. Plate body; 1a. Plate segment; 101. Avoidance hole; 102. Notch; 103. Weight reduction hole;

[0032] 2. Installation part; 201. Extension part; 202. Installation platform;

[0033] 3. Lower housing; 301. Cross beam; 302. Longitudinal beam;

[0034] 4. Battery module. Detailed implementation manner

[0035] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0036] In the following description, for the purpose of illustration rather than limitation, specific details such as specific system structures and technologies are put forward in order to thoroughly understand the embodiments of the present application. However, those skilled in the art should clearly understand that the present application can also be implemented in other embodiments without these specific details. In other cases, the detailed descriptions of well-known systems, devices, circuits and methods are omitted so as not to impede the description of the present application with unnecessary details.

[0037] In the description of the present utility model, it should be noted that if terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. appear, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model 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 a limitation to the present utility model. In addition, if terms such as "first" and "second" appear, they are also only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0038] In addition, in the description of the present utility model, unless otherwise clearly defined, the terms "installation", "connection", "connection", "connector" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood in combination with specific situations.

[0039] The present utility model will be described in detail below with reference to the drawings and in combination with embodiments.

[0040] Embodiment 1

[0041] This embodiment relates to a battery module pressing plate structure for fixing the battery module 4 in the battery pack housing. In terms of the overall structure, as Figure 1 shown, the battery module pressing plate structure of this embodiment includes a plate main body 1 and an installation part 2.

[0042] Among them, the plate body 1 has a rectangular plate-like structure. The bottom surface of the plate body 1 faces the top of the battery module 4. An installation part 2 extends outward from the plate body 1, and the installation part 2 is connected to the lower shell 3 of the battery pack to confine the battery module 4 between the plate body 1 and the lower shell 3.

[0043] It can be understood that during the driving of the vehicle, due to the long-term vibration and impact on the battery pack, each battery module 4 provided on the lower shell 3 of the battery pack is likely to be separated from the lower shell 3 due to vibration, making the battery module 4 unable to be stably held in the shell of the battery pack. As a result, it is easy to shake and collide in the shell due to the vibration of the battery pack, leading to damage to the battery module 4 itself and other electrical components. By setting the battery module pressing plate structure, the battery module 4 can be confined between the battery module pressing plate structure and the lower shell 3 to prevent the battery module 4 from separating from the lower shell 3.

[0044] As described above, through the setting of the plate body 1 and the installation part 2, when the plate body 1 is connected to the lower shell 3 of the battery pack through the installation part 2, the battery module 4 can be stably fixed on the lower shell 3, avoiding the separation of the battery module 4 from the lower shell 3, improving the fixing effect of the battery module 4, and thus enhancing the use quality of the battery pack.

[0045] Based on the above overall introduction, specifically, the battery module pressing plate structure of this embodiment is set as a rectangular plate-like structure, which can cover each battery module 4 in the lower shell 3, thereby ensuring the fixation of each battery module 4. The plate body 1 of this embodiment is made of steel, which has better structural strength and anti-bending performance compared with other materials, and can avoid deformation due to the vibration of the battery pack.

[0046] In order to improve the connection strength between the battery module pressing plate structure and the lower shell 3, thereby enhancing the fixing effect on the battery module 4, at least one installation part 2 is respectively provided at two opposite ends of the plate body 1 of this embodiment. By increasing the number of installation parts 2 and distributing the installation parts 2 at both ends of the plate body 1, the force on the plate body 1 is ensured to be uniform, improving the connection strength between the battery module pressing plate and the lower shell 3, and thus enhancing the fixing effect on the battery module 4.

[0047] During specific implementation, since it is necessary to ensure the structural strength of the lower shell 3, a cross beam 301 extending along the width direction of the lower shell 3 and a longitudinal beam 302 extending along the length direction of the lower shell 3 are usually provided in the lower shell 3. Among them, the longitudinal beam 302 is arranged at the center of the lower shell 3, and the cross beams 301 are configured as multiple ones arranged at intervals along the length direction of the lower shell 3. The longitudinal beam 302 and the cross beam 301 near the center of the lower shell 3 form a crossed cross structure, which can jointly improve the structural strength of the lower shell 3 with other cross beams 301.

[0048] At this time, the installation parts 2 can be arranged at both ends in the length direction of the battery module pressing plate structure and connected to the cross beam 301 on the lower housing 3. And due to the existence of the longitudinal beam 302 and the cross beam 301, each battery module 4 is arranged in the cavity formed by the enclosure of the cross beam 301 and the longitudinal beam 302, and each battery module 4 is respectively arranged on both sides of the longitudinal beam 302. Therefore, in order to further improve the fixing effect of the battery module pressing plate structure on the battery module 4, the installation parts 2 are configured as two groups of installation parts 2 located on both sides of the longitudinal beam 302, and each group of installation parts 2 includes four installation parts 2, which are respectively arranged at both ends of the battery module pressing plate along the arrangement direction of each battery module 4.

[0049] In order to facilitate the connection of each battery module 4 to each other through copper bars, the pole posts of each battery module are arranged at the top of the battery module, and a copper bar is provided at the top of each battery module 4. If the battery module pressing plate structures in this embodiment are arranged on the top of each battery module 4, the existence of the pole posts and the copper bars will reduce the contact area between the plate body 1 and the battery module 4, thereby reducing the fixing effect on each battery module 4. For this reason, a plurality of avoiding parts are provided on the plate body 1 of this embodiment, and the pole posts of each battery module pass through each avoiding part and extend to the top of the plate body 1. Through the arrangement of the avoiding parts, the plate body 1 can be closely attached to the top of each battery module 4, and at the same time, the pole posts of each battery module 4 can extend to the top of the plate body 1 to facilitate connection with the copper bars, thereby improving the fixing effect of the plate body on the battery module 4.

[0050] Specifically, the avoiding parts in this embodiment include strip-shaped avoiding holes 101 or notches 102 formed by the depression of the edge of the plate body 1, which is beneficial to the processing and forming of the avoiding parts. The two pole posts of any battery module 4 can extend to the top of the plate body 1 through a corresponding avoiding hole 101 or notch 102. In specific implementation, a plurality of avoiding holes 101 are provided in the middle of the plate body 1, and notches 102 can be provided at the edge. However, since the processing specifications of the avoiding holes 101 and the notches 102 are different, in order to facilitate the processing and forming of the plate body 1, only a plurality of avoiding holes 101 are provided on the plate body 1 with an integral structure, while a plurality of notches 102 can be provided on the plate body with a split structure described below.

[0051] In order to reduce the weight of the battery module pressing plate structure while ensuring the structural strength of the battery module pressing plate structure, a weight reduction structure is provided on the plate body 1 of this embodiment. The weight reduction structure includes a cross-shaped weight reduction hole 103. Through the setting of the weight reduction hole 102, while ensuring that there is sufficient contact area between the plate body 1 and the top of the battery module 4, the weight of the battery module pressing plate structure can be reduced, thereby reducing the overall weight of the battery pack and improving the usage quality of the battery pack. In specific implementation, the weight reduction hole 103 is cross-shaped, and the cross structure of the weight reduction hole 103 is arranged along the length and width directions of the plate body 1, and the weight reduction hole 103 is configured to be two to reduce the plate body 1 between the battery modules 4 and thus reduce the weight of the plate body 1. And the two weight reduction holes 103 are arranged at intervals to prevent the two weight reduction holes 103 from being connected and causing a decrease in the structural strength of the plate body 1. And a weight reduction opening may also be provided between the two weight reduction holes 103 to further reduce the weight of the plate body 1.

[0052] In order to further improve the connection strength between the battery module pressing plate structure and the lower housing 3, thereby improving the fixing effect on the battery module 4, as Figure 2 , Figure 3 and Figure 4 shown, the plate body 1 of this embodiment includes two plate segments 1a arranged at intervals. At least one mounting portion 2 is provided at each of the two opposite ends of each plate segment 1a along the length direction or the width direction. By dividing the plate body 1 into two plate segments 1a and arranging a plurality of mounting portions 2 at the two opposite ends of the plate segments 1a, the number of mounting portions 2 can be further increased, thereby improving the connection strength between the battery module 4 pressing plate and the lower housing 3, and thus further improving the fixing effect on the battery module 4.

[0053] In specific implementation, as an implementation manner, as Figure 2 shown, the plate body 1 can be divided into two plate segments 1a along its width direction. The above-mentioned avoidance hole 101 is provided on the plate segment 1a, and the mounting portions 2 on both sides of the plate segment 1a are connected to two adjacent cross beams 301. As another implementation manner, as Figure 3 shown, the plate body 1 can be divided into two plate segments 1a along its length direction. At this time, a notch 102 formed by the length side of the plate segment 1a recessing into the plate segment 1a is formed on the plate segment 1a. The notch 102 can avoid the two pole columns of the battery module 4, thereby facilitating the connection between the battery module 4 and the copper row.

[0054] In order to improve the connection effect of the mounting part 2, each mounting part 2 of this embodiment includes an extension part 201 formed by bending and extending downward from the board main body 1, and a mounting platform 202 formed by horizontally extending from the extension part 201 in a direction away from the board main body 1. Each mounting platform 202 is fixedly connected to each cross beam 301 of the lower housing 3 through a connecting piece. By providing the extension part 201 and the mounting platform 202, the board main body 1 can be stably connected to the lower housing 3, thereby improving the connection effect of the mounting part 2. And since the mounting part 2 is connected to the cross beam 301 of the lower housing 3, and the cross beam 301 only plays a strengthening role, in order to reduce the size of the cross beam 301 in the thickness direction of the battery pack to reduce the weight of the lower housing 3, the setting of the extension part 201 can increase the distance between the mounting platform 202 and the board main body 1, so as to effectively connect the cross beam 301 and reduce the size requirement for the cross beam 301.

[0055] In order to further improve the connection effect between the mounting part 2 and the lower housing 3, the connecting piece of this embodiment is a bolt, which has good connection strength, thereby improving the connection effect between the mounting part 2 and the lower housing 3. At the same time, the detachable setting of the bolt can facilitate the maintenance of the battery module pressing plate structure and the battery module 4. In specific implementation, the bolts of this embodiment are configured as a plurality of bolts arranged at intervals along the extending direction of the mounting platform 202.

[0056] It can be understood that since the board main body 1 presses the battery module 4 tightly on the lower housing 3, there will still be a certain gap between the board main body 1 and the top of the battery module 4. When the battery pack receives vibration, the existence of this gap will cause the board main body 1 and the battery module 4 to collide with each other and generate abnormal noises. Moreover, the existence of this gap easily leads to the battery module 4 not being pressed tightly on the lower housing 3, and there is still a risk of separation between the battery module 4 and the lower housing 3.

[0057] Therefore, in order to improve the fixing effect on the battery module 4, the board main body 1 and the top of the battery module 4 of this embodiment are adhesively connected, which can fill the gap between the bottom of the board main body 1 and the top of the battery module 4, so that the board main body 1 and the battery module 4 are closely attached to each other, avoiding abnormal noises caused by the board main body 1 colliding with the battery module 4 due to vibration, and at the same time improving the fixing effect on the battery module 4 and avoiding the separation of the battery module 4 from the lower housing 3. In specific implementation, the glue used for adhesive connection can adopt the adhesive glue well-known to those skilled in the art, such as structural glue, foaming glue, etc., as long as it can bond the board main body 1 and the battery module 4 together.

[0058] In summary, for the battery module pressing plate structure of this embodiment, when the plate body 1 is connected to the lower housing 3 of the battery pack through the installation part 2, the battery module 4 can be stably fixed on the lower housing 3, preventing the battery module 4 from separating from the lower housing 3, improving the fixing effect of the battery module 4, thereby enhancing the usage quality of the battery pack, and having good practicality.

[0059] Embodiment 2

[0060] This embodiment relates to a battery pack. In terms of the overall structure, the battery pack is provided with the battery module pressing plate structure as described in Embodiment 1.

[0061] By setting the battery pressing plate structure, the battery pack of this embodiment can improve the fixing effect on the battery module 4, prevent the battery module 4 from separating from the lower housing 3 of the battery pack, and thereby enhance the usage quality of the battery pack.

[0062] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A battery module pressing plate structure, characterized in that, Comprising: A plate body, which is in a rectangular plate-like structure, and the bottom surface of the plate body is arranged facing the top of the battery module; A mounting portion, which is formed by extending outward from the plate body; The mounting portion is connected to the lower housing of the battery pack to constrain the battery module between the plate body and the lower housing.

2. The battery module pressing plate structure according to claim 1, wherein: At least one of the mounting portions is provided at each of the two opposite ends of the plate body.

3. The battery module pressing plate structure according to claim 1, wherein: A plurality of avoidance portions are formed on the plate body, and the pole columns of the battery modules pass through the avoidance portions and extend to the top of the plate body.

4. The battery module pressing plate structure according to claim 3, wherein: The avoidance portion includes a strip-shaped avoidance hole and / or a notch formed by recessing the edge of the plate body.

5. The battery module pressing plate structure according to claim 1, wherein: A weight reduction structure is provided on the plate body, and the weight reduction structure includes a cross-shaped weight reduction hole.

6. The battery module pressing plate structure according to claim 1, wherein: The plate body includes two plate segments arranged at intervals; At least one of the mounting portions is provided at each of the two opposite ends of each of the plate segments along the length direction or the width direction.

7. The battery module pressing plate structure according to any one of claims 1 to 6, wherein: Each of the mounting portions includes an extension portion formed by bending and extending downward from the plate body, and a mounting platform formed by laterally extending from the extension portion away from the plate body; Each of the mounting platforms is fixedly connected to each cross beam of the lower housing through a connecting member.

8. The battery module pressing plate structure according to claim 7, wherein: The connecting member is a bolt.

9. The battery module pressing plate structure according to claim 7, wherein: The plate body and the top of the battery module are adhesively connected.

10. A battery pack, wherein: The battery pack is provided with the battery module pressing plate structure according to any one of claims 1 to 9.

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