Battery pack

Abstract

The utility model provides a battery pack. The battery pack comprises a shell body and a battery module arranged in the shell body, the battery module is provided with a front end plate, and the front end plate is connected with the shell body in the Z direction. According to the battery pack disclosed by the utility model, the overall structural strength of the shell body can be enhanced through the front end plate, the function of the front end plate is expanded, a collision safety protection mode under the combined action of the battery module modules and the shell body modules in the battery pack is realized, and under the combined cooperation of the two modules, the safety of the battery pack is improved. Compared with the prior art that only the protective measure of the shell body module is considered, the battery pack has the advantages that the collision performance of the whole battery pack can be effectively improved, so that the damage of front collision to the battery pack can be effectively reduced, and the safety coefficient of the battery pack is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery pack. Background Art

[0002] The power battery pack is mainly composed of five parts: housing module, battery module, electrical module, thermal management module, and BMS module. It is one of the core components of electric vehicles and directly affects the power performance and safety of the vehicle. Therefore, the design of the power battery pack needs to consider many factors such as its energy density, life, and safety. In order to ensure the safe use of the power battery pack, a series of tests are required, such as charging and discharging protection, temperature control, simulated collision, etc. These measures can effectively prevent damage to the battery pack performance and thus ensure the safety of the vehicle.

[0003] Collision is an important test item for power battery packs. Collision may cause damage to the battery cell or battery module, which may lead to electrochemical risks, thermal runaway, fire or explosion, etc. In order to reduce this risk, some protective measures are taken during the design and manufacturing process of the battery pack to resist the impact caused by the collision, such as selecting a higher strength material for the battery pack shell, or relying on a reinforced beam structure to ensure the overall structural strength of the battery pack to prevent damage to the battery module after a collision.

[0004] However, in order to reduce the impact caused by collision, the existing power battery packs generally adopt protective measures for the shell module, such as using the above-mentioned reinforcing materials or reinforcing beam structures. However, only considering the improvement of the collision performance of a single shell module, the overall structural strength and safety of the battery pack are still insufficient, especially the protection performance of internal components is relatively weak, resulting in the internal components of the battery pack being easily damaged when responding to certain collision conditions, and failing to meet collision and safety requirements. Utility Model Content

[0005] In view of this, the utility model aims to provide a battery pack to improve the collision performance of the entire pack.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A battery pack comprises a shell body and a battery module arranged in the shell body;

[0008] The battery module has a front end plate, and the top and bottom of the front end plate are connected to the shell body in the Z direction.

[0009] Furthermore, the shell body includes an upper shell; the front end plate is provided with a plurality of protrusion structures extending forward, and the front end plate is detachably connected to the upper shell in the Z direction through the plurality of protrusion structures.

[0010] Furthermore, the protruding structure is connected to the upper shell via a connecting piece.

[0011] Furthermore, the protruding structure is provided with a screw hole, and the upper shell is provided with a screw fitting hole; the connecting member passes through the screw fitting hole and is screwed into the screw hole to form a connection between the protruding structure and the upper shell.

[0012] Furthermore, the protrusion structure includes a protrusion body and a bushing embedded in the protrusion body, and the screw hole is formed on the bushing.

[0013] Furthermore, the protrusion body includes an upper protrusion provided with the bushing, and a lower protrusion provided at the bottom of the upper protrusion; in the Y direction, the width dimension of the upper protrusion is greater than the width dimension of the lower protrusion.

[0014] Furthermore, in the Z direction, the upper protrusion is formed with a first cavity and multiple second cavities in sequence from top to bottom, and the first cavity and each of the second cavities extend along the X direction; the top of the first cavity is open, and a boss is provided in the first cavity; the bushing is embedded in the boss.

[0015] Furthermore, first reinforcing ribs are provided between the boss and the side wall of the first cavity, and between the boss and the bottom wall of the first cavity.

[0016] Furthermore, a second reinforcing rib is provided between each of the protruding bodies and the front end plate; and / or each of the protruding bodies and the front end plate are integrally formed.

[0017] Furthermore, a reinforcing plate is provided on the upper shell; the reinforcing plate is sandwiched between the plurality of protruding structures and the upper shell.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The battery pack described in the utility model connects the top and bottom of the front end plate in the battery module with the shell body in the Z direction, so that the overall structural strength of the shell body can be strengthened by the front end plate, the function of the front end plate is expanded, and a collision safety protection mode in which the battery module module and the shell body module in the battery pack work together is realized. Moreover, with the joint cooperation of the two major modules, the overall collision protection measures of the battery pack have more obvious advantages. Compared with the traditional technology that only considers the protection measures of the shell body module, the collision performance of the whole pack can be effectively improved, thereby effectively reducing the damage to the battery pack caused by the front collision and increasing the safety factor of the battery pack.

[0020] In addition, multiple protrusions extending forward are arranged on the front panel, so that each protrusion can carry and absorb the collision energy when the battery pack collides with the front, which has a high benefit on the front collision safety, thereby further improving the collision safety of the whole pack. At the same time, the front panel is detachably connected to the upper shell in the Z direction through multiple protrusions, which is conducive to the assembly between the front panel and the upper shell. The protrusion structure is connected to the upper shell through a connector, which is conducive to building a more effective Z-direction force transmission channel through the connector, thereby improving the Z-direction safety of the whole pack.

[0021] Secondly, by providing a bushing, it is convenient to arrange and form the screw connection hole, and the bushing is embedded in the protrusion body, which is convenient to improve the stability of the bushing. In the Y direction, the width of the upper protrusion is larger than the width of the lower protrusion, which can form a T-shaped structure to improve the structural strength and collision performance of the protrusion body. The first cavity and multiple second cavities are provided on the upper protrusion, which can utilize the high strength of the cavity structure to improve the structural strength of the upper protrusion, and is also convenient for weight reduction design. At the same time, the top of the first cavity is open, which is also convenient for the arrangement and embedding of the bushing.

[0022] In addition, the provision of the first reinforcing rib is conducive to improving the structural stability of the boss, thereby further improving the reliability of the bushing. The provision of the second reinforcing rib can improve the connection strength between the front end plate and the plurality of protruding bodies, thereby helping to increase the front collision safety with great benefits. The provision of the reinforcing plate is not only conducive to improving the structural strength of the upper shell, but also can further enhance the collision safety factor of the front end plate and the shell body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the battery pack according to the embodiment of the utility model;

[0025] Figure 2 An exploded view of a battery pack according to an embodiment of the present utility model;

[0026] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0027] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0028] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0029] Figure 6 A top view of a battery pack according to an embodiment of the present utility model;

[0030] Figure 7 for Figure 6 Cross-sectional view along the DD direction;

[0031] Figure 8 for Figure 7 Enlarged view of point E in the middle;

[0032] Description of reference numerals:

[0033] 1. Shell body; 10. Screw-fitting hole; 11. Lower shell; 12. Upper shell; 13. Reinforcement plate; 130. Through hole;

[0034] 2. Battery module; 20. Battery cell; 21. Front end plate; 200. Screw hole; 211. Protrusion body; 2111. Upper protrusion; 21111. First cavity; 21112. Second cavity; 21113. Boss; 21114. First reinforcing rib; 2112. Lower protrusion; 212. Second reinforcing rib; 22. Side plate; 23. Rear end plate; 24. Bushing;

[0035] 3. Connectors. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0037] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0038] Taking the vehicle in which the battery pack described in the utility model is located as an example, the directional words used in the embodiments, such as "up, down, left, right, front, and back", are defined based on the up and down direction (also known as the height direction, or the Z direction of the whole vehicle), the left and right direction (also known as the Y direction, or the Y direction of the whole vehicle), and the front and rear direction (also known as the X direction, or the X direction of the whole vehicle). "Inside and outside" are defined based on the contour of the corresponding parts. For example, "inside" and "outside" are defined based on the contour of the vehicle, and the side of the vehicle contour close to the middle of the vehicle is "inside", and the opposite is "outside".

[0039] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "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 a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

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

[0041] The present embodiment relates to a battery pack, which can improve the collision performance of the entire pack and effectively reduce the damage to the battery pack caused by a frontal collision, thereby increasing the safety of the battery pack.

[0042] In terms of overall structure, the battery pack of this embodiment is as follows Figures 1 to 8 As shown, it includes a shell body 1 and a battery module 2 arranged in the shell body 1. In addition, the battery module 2 has a front end plate 21, and the top and bottom of the front end plate 21 are connected to the shell body 1 in the Z direction.

[0043] The battery pack of this embodiment connects the top and bottom of the front end plate 21 in the battery module 2 to the shell body 1 in the Z direction, so that the overall structural strength of the shell body 1 can be strengthened by the front end plate 21, the function of the front end plate 21 is expanded, and a collision safety protection mode in which the battery module 2 and the shell body 1 in the battery pack work together is realized. With the joint cooperation of the two modules, the overall collision protection measures of the battery pack are more obviously advantageous. Compared with the traditional technology that only considers the protection measures of the shell body 1 module, the collision performance of the entire pack can be effectively improved, thereby effectively reducing the damage to the battery pack caused by a front collision and increasing the safety factor of the battery pack.

[0044] Specifically, in this embodiment, as an exemplary structure, Figure 2 and Figure 3 As shown, the shell body 1 includes a lower shell 11 and an upper shell 12 that are interlocked. At the same time, the front side of the front plate 21 is provided with a plurality of protrusions extending forward, and the front plate 21 is detachably connected to the upper shell 12 in the Z direction through the plurality of protrusions.

[0045] It can be understood here that a plurality of protruding structures extending forward are provided on the front end plate 21, so that each protruding structure can carry and absorb the collision energy when a front collision with the battery pack occurs, thereby having a high benefit on the front collision safety, thereby further improving the collision safety of the entire pack. At the same time, the front end plate 21 is detachably connected to the upper shell 12 in the Z direction through a plurality of protruding structures, which also facilitates the assembly between the front end plate 21 and the upper shell 12.

[0046] Of course, the number and arrangement of the protruding structures in this embodiment can be set and adjusted accordingly according to actual collision performance requirements. For example, they can be specifically set to three or four protruding structures arranged at intervals along the Y direction.

[0047] Combination Figure 3 , Figures 6 to 8 As shown, in this embodiment, as a preferred implementation form, the protrusion structure is connected to the upper shell 12 through the connecting member 3, so as to facilitate the construction of a more effective Z-direction force transmission channel through the connecting member 3, thereby improving the Z-direction safety of the entire package.

[0048] Furthermore, in the specific implementation of this embodiment, as a preferred implementation form, the protruding structure is provided with a screw hole 200, and the upper shell 12 is provided with a screw matching hole 10. The connecting member 3 passes through the screw matching hole 10 and is screwed into the screw hole 200 to form a connection between the protruding structure and the upper shell 12.

[0049] The connecting member 3 of this embodiment can be a bolt or a screw. In addition, in this embodiment, the protrusion structure and the upper shell 12 can be connected by riveting in addition to the screw connection, and the riveting and screwing can achieve basically the same effect in terms of connection strength. In this case, the connecting member 3 can be a rivet.

[0050] At the same time, considering the connection strength requirements between the front end plate 21 and the shell body 1, in this embodiment, as a preferred implementation form, on the basis of the above-mentioned screw connection or riveting, the protrusion structure and the lower shell 11, as well as the protrusion structure and the upper shell 12 are glued together, thereby further improving the connection strength and connection reliability.

[0051] See also Figure 4 As shown, in this embodiment, as a preferred implementation form, the protrusion structure includes a protrusion body 211, and a bushing 24 embedded in the protrusion body 211, and the screw hole 200 is formed on the bushing 24. Here, by providing the bushing 24, the arrangement and forming of the screw hole 200 are facilitated, and the bushing 24 is embedded in the protrusion body 211, which is conducive to improving the use stability of the bushing 24.

[0052] In detail, as a preferred implementation form, the protrusion body 211 of this embodiment includes an upper protrusion 2111 provided with a bushing 24, and a lower protrusion 2112 provided at the bottom of the upper protrusion 2111. In the Y direction, the width dimension of the upper protrusion 2111 is greater than the width dimension of the lower protrusion 2112.

[0053] The main benefit of such a configuration is that it can form a T-shaped structure to enhance the structural strength and collision performance of the protruding body 211 , thereby further enhancing the collision safety of the entire package.

[0054] Furthermore, in this embodiment, as a preferred implementation form, in the Z direction, the upper protrusion 2111 is sequentially formed with a first cavity 21111 and a plurality of second cavities 21112 from top to bottom, and the first cavity 21111 and each second cavity 21112 extend along the X direction. The top of the first cavity 21111 is open, and a boss 21113 is provided in the first cavity 21111, and the bushing 24 is embedded in the boss 21113.

[0055] It can be understood that by providing a first cavity 21111 and multiple second cavities 21112 on the upper protrusion 2111, the structural strength of the upper protrusion 2111 can be improved by utilizing the high strength of the cavity structure, which is also beneficial to the weight reduction design. At the same time, the top of the first cavity 21111 is open, which is also beneficial to the arrangement and installation of the bushing 24.

[0056] The extension lengths of the upper protrusion 2111 and the lower protrusion 2112 in the Z direction can be set and adjusted according to the actual structural reinforcement requirements and the arrangement requirements of the bushing 24. At the same time, the number of the second cavities 21112 can also be set to two or three arranged in sequence according to the actual structural reinforcement requirements and weight reduction requirements.

[0057] Continue to see Figure 4 As shown, in this embodiment, as a preferred implementation form, first reinforcing ribs 21114 are provided between the boss 21113 and the side wall of the first cavity 21111, and between the boss 21113 and the bottom wall of the first cavity 21111. In this way, the structural stability of the boss 21113 can be improved, thereby further improving the reliability of the bushing 24.

[0058] Also, see again Figure 4 As shown, in this embodiment, as a preferred implementation form, a second reinforcing rib 212 is provided between each protrusion body 211 and the front end plate 21, thereby being able to improve the connection strength between the front end plate 21 and the plurality of protrusion bodies 211, thereby being beneficial to increasing the front collision safety with great benefits.

[0059] Moreover, the number and arrangement of the first reinforcing ribs 21114 and the second reinforcing ribs 212 of this embodiment can be set and adjusted according to actual structural reinforcement requirements. For example, the second reinforcing ribs 212 can be specifically set to five or six arranged at intervals along the Y direction.

[0060] At the same time, as a preferred implementation form, in this embodiment, each protrusion body 211, each second reinforcing rib 212, the boss 21113, each first reinforcing rib 21114 and the front end plate 21 are integrally formed to obtain good structural strength and molding quality.

[0061] In addition, see Figure 3 and Figure 8 As shown, in this embodiment, as a preferred implementation form, a reinforcing plate 13 is provided on the upper shell 12, and the reinforcing plate 13 is sandwiched between the plurality of protruding structures and the upper shell 12. The main benefit of such a setting is that it is not only conducive to improving the structural strength of the upper shell 12, but also can further enhance the collision safety factor of the front end plate 21 and the shell body 1.

[0062] It can be understood that the battery pack of this embodiment combines the battery module 2 and the shell body 1, and expands the function of the front end plate 21 of the battery module 2 in the design concept. The raised structure has a great benefit on the front collision safety performance. Compared with the reinforcing effect of the reinforcing plate 13 in the X direction, the multiple raised structures of the front end plate 21 and the upper shell 12 are fixed, which not only strengthens the protection measures in the X direction, but also provides a strong structural reinforcement effect in the Z direction, making the front collision structure of the whole pack safer and more reliable.

[0063] It is still necessary to mention here that the reinforcing plate 13 of this embodiment is provided with through holes 130 corresponding to the screw fitting holes 10 for the connector 3 to pass through. At the same time, the relevant structural parts not mentioned in the battery pack of this embodiment can refer to the various structures in the existing battery pack, for example, the battery module 2 includes a plurality of battery cells 20, and the front end plate 21 is arranged at the front end of the plurality of battery cells 20. In addition to the front end plate 21, the battery module 2 also includes side plates 22 arranged on both sides of the plurality of battery cells 20, and a rear end plate 23 arranged at the rear end of the plurality of battery cells 20.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack, characterized in that: It includes a shell body, and a battery module arranged in the shell body; The battery module has a front end plate, and the top and bottom of the front end plate are connected to the shell body in the Z direction.

2. The battery pack according to claim 1, characterized in that: The shell body includes an upper shell; The front end plate is provided with a plurality of protrusion structures extending forward, and the front end plate is detachably connected to the upper shell in the Z direction via the plurality of protrusion structures.

3. The battery pack according to claim 2, characterized in that: The protruding structure is connected to the upper shell through a connecting piece.

4. The battery pack according to claim 3, characterized in that: The protruding structures are each provided with a screw connection hole, and the upper shell is provided with a screw connection matching hole; The connecting piece passes through the threaded fitting hole and is threadedly connected in the threaded hole to form a connection between the protruding structure and the upper shell.

5. The battery pack according to claim 4, characterized in that: The protrusion structure comprises a protrusion body and a bushing embedded in the protrusion body, and the screw hole is formed on the bushing.

6. The battery pack according to claim 5, characterized in that: The protrusion body includes an upper protrusion provided with the bushing, and a lower protrusion provided at the bottom of the upper protrusion; In the Y direction, the width dimension of the upper protrusion is greater than the width dimension of the lower protrusion.

7. The battery pack according to claim 6, characterized in that: In the Z direction, the upper protrusion is formed with a first cavity and a plurality of second cavities in sequence from top to bottom, and the first cavity and each of the second cavities extend along the X direction; The top of the first cavity is open, and a boss is arranged in the first cavity; the bushing is embedded in the boss.

8. The battery pack according to claim 7, characterized in that: First reinforcing ribs are provided between the boss and the side wall of the first cavity, and between the boss and the bottom wall of the first cavity.

9. The battery pack according to claim 5, characterized in that: A second reinforcing rib is provided between each of the protruding bodies and the front end plate; and / or each of the protruding bodies and the front end plate are integrally formed.

10. The battery pack according to any one of claims 2 to 9, characterized in that: The upper shell is provided with a reinforcement plate; The reinforcing plate is sandwiched between the plurality of protruding structures and the upper shell.

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