Battery module and battery pack

Abstract

The utility model relates to the technical fields of lithium cell, provide a kind of battery module and battery pack, including busbar assembly, module upper cover and locking piece;Busbar assembly includes connector support and multiple busbar main body, multiple busbar main body is located on connector support;At least one end of connector support is equipped with limit post, each busbar main body is equipped with protruding portion, and limit hole is set on protruding portion;At least one end of module upper cover is equipped with limit slot, limit slot is limited with limit post, and module upper cover is also equipped with multiple locking holes, multiple locking holes are set up one by one with limit hole, and form locking space;Locking piece is cooperated with the locking space, to fix module upper cover on busbar assembly.The utility model fixes module upper cover on busbar assembly by the cooperation of limit post in limit slot and the locking of locking piece, improves the fixing strength of module upper cover, and effectively solve the problem of vibration failure in actual working condition.

Description

Technical Field

[0001] This utility model relates to the technical field of lithium batteries, and in particular to a battery module and battery pack. Background Technology

[0002] In battery modules, PC material vacuum-formed busbar brackets are a current design trend. Compared to the previous injection-molded busbar brackets, due to their softer and thinner material, there are significant challenges in fixing the module cover (especially mica material). Because the fit between the module cover and the busbar bracket is unstable, the cover and the busbar bracket are prone to tearing or cracking during rigorous tests such as vibration. Utility Model Content

[0003] This utility model provides a battery module and battery pack to solve the defect of weak structural stability in the connection between the busbar assembly and the module cover in the prior art.

[0004] This utility model provides a battery module, characterized in that it includes: a busbar assembly, a module cover, and a locking component; the busbar assembly includes a connector bracket and multiple busbar bodies, the multiple busbar bodies being disposed on the connector bracket; at least one end of the connector bracket is provided with a limiting post, each busbar body is provided with a protrusion, the protrusion having a limiting hole; at least one end of the module cover is provided with a limiting groove, the limiting groove engaging with the limiting post, and the module cover also has multiple locking holes, the multiple locking holes corresponding one-to-one with the limiting holes, forming a locking space; the locking component engages with the locking space to fix the module cover to the busbar assembly.

[0005] According to the battery module provided by this utility model, the locking member includes a limiting part, a connecting post and a locking head. The limiting part and the locking head are connected through the connecting post, and the limiting part cooperates with the limiting hole for limiting, and the locking head cooperates with the locking hole for locking.

[0006] According to the battery module provided by this utility model, the limiting hole is constructed as an elongated hole, and the corresponding limiting part is constructed as an elongated structure, and the length of the limiting part is less than the diameter of the locking hole.

[0007] According to the battery module provided by this utility model, the locking head is constructed as a cylindrical structure, and the diameter of the locking head is larger than the diameter of the locking hole.

[0008] According to the battery module provided by this utility model, there is a receiving space between the protrusion and the connector bracket, and the receiving space is used to receive the limiting part.

[0009] According to the battery module provided by this utility model, the connector bracket includes a supporting connecting plate, and a plurality of busbar bodies are spaced apart on both sides of the supporting connecting plate in the length direction, and there is a gap between adjacent busbar bodies.

[0010] According to the battery module provided by this utility model, the first end of the connector bracket is provided with a plug-in module, and the plug-in module is provided with the limiting post on both sides; wherein, the limiting post includes a smooth rod post and a limiting head, the limiting head is located at the top of the smooth rod post, and the diameter of the limiting head is larger than the diameter of the smooth rod post.

[0011] According to the battery module provided by this utility model, the limiting groove includes a circular hole groove segment and a straight groove segment. The straight groove segment is connected to the circular hole groove segment, and the groove width of the straight groove segment is smaller than the diameter of the circular hole of the circular hole groove segment.

[0012] According to the battery module provided by this utility model, the limiting post and the limiting groove are interference-fitted.

[0013] The second aspect of this utility model provides a battery pack, including the battery module described in any of the above claims.

[0014] The battery module and battery pack provided by this utility model feature a protrusion and a limiting hole on the main body of the busbar, with a locking hole corresponding to the position of the module cover. When installing the module cover, a limiting groove is provided at the end of the module cover, which engages with the limiting post on the busbar assembly for positioning. Furthermore, the locking mechanism, in conjunction with the limiting hole and locking hole, secures the module cover to the busbar assembly, improving the fixation strength of the module cover and effectively solving the vibration failure problem in actual working conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a partial structural schematic diagram of the busbar assembly in the battery module provided by this utility model.

[0017] Figure 2 This utility model provides Figure 1 A magnified structural diagram of point A in the middle.

[0018] Figure 3 This utility model provides Figure 1 A magnified structural diagram at point B in the middle.

[0019] Figure 4 This is a partial structural diagram of the upper cover of the battery module provided by this utility model.

[0020] Figure 5 This utility model provides Figure 4 A magnified structural diagram at point C.

[0021] Figure 6 This is a structural schematic diagram of the battery module provided by this utility model.

[0022] Figure 7 This utility model provides Figure 6 A magnified structural diagram at point D.

[0023] Figure 8 This is a structural schematic diagram of the locking component in the battery module provided by this utility model.

[0024] Figure 9 This is a schematic diagram of the state structure of the locking component in the battery module provided by this utility model during the installation process.

[0025] Figure 10 This is a schematic diagram of the structure of the battery module provided by this utility model after the locking component is installed.

[0026] Figure label:

[0027] 1. Busbar assembly; 11. Connector bracket; 12. Busbar body; 121. Protrusion; 122. Limiting hole; 123. Accommodation space; 13. Limiting post; 131. Smooth post; 132. Limiting head; 14. Plug-in module; 2. Module cover; 21. Locking hole; 22. Limiting groove; 221. Straight groove segment; 222. Round hole groove segment; 3. Locking component; 31. Limiting part; 32. Connecting post; 33. Locking head. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0031] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined with Figures 1-10This utility model describes a battery module, including a busbar assembly 1, a module cover 2, and a locking member 3. The busbar assembly 1 includes a connector bracket 11 and multiple busbar bodies 12, with the multiple busbars disposed on the connector bracket 11. At least one end of the connector bracket 11 is provided with a limiting post 13, and each busbar body 12 is provided with a protrusion 121, on which a limiting hole 122 is formed. At least one end of the module cover 2 is provided with a limiting groove 22, which cooperates with the limiting post 13 for limiting. The module cover 2 is also provided with multiple locking holes 21, which are arranged one-to-one with the limiting holes 122 to form a locking space. The locking member 3 cooperates with the locking space to fix the module cover 2 to the busbar assembly 1. In the battery, current transmission between different battery cells is achieved through busbar assembly 1. The module cover 2 is used to protect the busbar body 12 and various internal components in the inner busbar assembly 1. In this example, the end is snapped together by the cooperation of the limiting post 13 and the limiting groove 22, and the main body of the module cover 2 is snapped together by the cooperation of the locking member 3 and the locking space. This enables the overall fast connection of the module cover 2 and improves the structural stability of the connection between the module cover 2 and the busbar assembly 1.

[0034] Specifically, the busbar body 12 is a plate-shaped structure. A protrusion 121 is provided on the surface of the busbar body 12, and a limiting hole 122 is formed on the plate of the protrusion 121. The limiting hole 122 is used to cooperate with the locking member 3 to connect the module cover 2 to the busbar assembly 1. Furthermore, a limiting component is provided at at least one end of the busbar body 12 and the module cover 2. The limiting component includes a limiting post 13 provided on the connector bracket 11 and a limiting groove 22 formed on the module cover 2. The limiting groove 22 and the limiting post 13 engage to achieve a secure connection at the ends.

[0035] In a specific embodiment, the limiting post 13 can be a column structure of any cross-sectional shape. The shape of the limiting groove 22 matches the shape of the limiting post 13, so that the main body of the limiting post 13 is inserted into the limiting groove 22 under the action of external force, thereby achieving a tight fit between the busbar assembly 1 and the end of the module cover 2. Furthermore, the specific shapes of the limiting hole 122 and the locking hole 21 are not limited, as long as they can cooperate with the locking member 3 to achieve locking. For example, they can be round holes, polygonal holes, irregular holes, etc. Correspondingly, the shape of the limiting post 13 matches the shape of the hole to achieve locking and positioning.

[0036] Understandably, the module cover 2 is connected to the busbar assembly 1 to protect the components inside the busbar assembly 1. In traditional technology, the busbar assembly 1 and the module cover 2 are only connected by bolts or adhesives. This method is less stable, especially for the connector bracket 11, which is made of a relatively thin material. Bolts and other connection methods are difficult to achieve a stable connection. In this embodiment, the module cover 2 is stably connected by the engagement of the limiting post 13 and the limiting groove 22, as well as the setting of the locking part 3, thereby improving the stability of the connection between the two.

[0037] Furthermore, by setting the protrusion 121, when the module cover 2 is connected to the bus body 12, there is a certain gap between the bottom surface of the module cover 2 and the structure of the bus body 12, which is beneficial for the arrangement of circuits and other components.

[0038] In some embodiments, such as Figure 8 As shown, the locking component 3 in the battery module includes a limiting part 31, a connecting post 32, and a locking head 33. The limiting part 31 and the locking head 33 are connected by the connecting post 32, and the limiting part 31 cooperates with the limiting hole 122 for limiting, while the locking head 33 cooperates with the locking hole 21 for locking. In the above embodiment, the main connection between the module cover 2 and the busbar assembly 1 is mainly locked by the locking component 3. In this embodiment, the limiting part 31 cooperates with the limiting hole 122 for limiting, and the locking head 33 is used to lock the module cover 2 and the busbar assembly 1.

[0039] Specifically, a locking head 33 is formed at one end of the connecting post 32. The size of the locking head 33 is larger than the size of the connecting post 32. The limiting part 31 is located at the other end of the connecting post 32, and the locking head 33, the connecting post 32, and the limiting part 31 are integrally formed. The overall structural strength can be improved by integral forming.

[0040] In this embodiment, the specific structures of the limiting part 31 and the locking head 33 are not limited. As long as the limiting part can cooperate with the limiting hole 122 for limiting, and the locking head 33 can cooperate with the locking hole 21 for limiting, it is acceptable. For example, the limiting part 31 can be a structure with an elastic protrusion, and the locking head 33 can be a polygonal disc-shaped structure. The length of the connecting post 32 is set within a suitable size range, so that the elastic protrusion can retract after reaching the limiting hole 122, and pop out when it just passes the limiting hole 122 to achieve axial limiting. At this time, the locking head 33 contacts and abuts against the surface of the module cover 2, thereby achieving a stable connection between the two. Of course, the locking head 33 can also be designed as an axially adjustable structure, for example, it can be a nut or a locking clip structure.

[0041] In conjunction with the above embodiments, such as Figure 3As shown, the limiting hole 122 is constructed as an elongated hole, and the corresponding limiting part 31 is constructed as an elongated structure, with the length of the limiting part 31 being less than the diameter of the locking hole 21. The locking member 3 needs to fix the module cover 2 to the busbar assembly 1 in the axial direction to improve the stability of the connection between the two. This embodiment, by defining the specific structure of the locking member 3, facilitates the assembly of the locking member 3, enables quick assembly of the locking member 3, and achieves stable locking.

[0042] Specifically, such as Figure 9 As shown, the limiting part 31 is a cylindrical structure, and the limiting part 31 extends radially along the connecting column 32. During installation, the limiting part 31 cooperates with the elongated hole. After the limiting part 31 passes through the elongated hole, the locking member 3 is rotated to make the extension direction of the limiting part deviate from the length direction of the elongated hole. At this time, the locking member 3 and the limiting hole 122 can be limited. At the same time, the locking head 33 part abuts against the module cover 2, so that the module cover 2 and the busbar assembly 1 are stably connected.

[0043] Furthermore, when locking, after the limiting part 31 passes over the limiting hole 122, the locking part 3 rotates 90° so that the extension direction of the limiting part 31 is perpendicular to the length direction of the limiting hole 122, thereby achieving axial limiting and ensuring a stable connection between the module cover 2 and the busbar assembly 1.

[0044] In conjunction with the above embodiments, the locking head 33 is constructed as a cylindrical structure, and the diameter of the locking head 33 is larger than the diameter of the locking hole 21. When the locking member 3 is locked, the locking head 33 abuts against the module cover 2, and the limiting part 31 contacts and abuts against the protrusion 121, thereby achieving a stable connection of the module cover 2. In this embodiment, by setting the cylindrical structure and limiting the diameter, the locking head 33 can contact the module cover 2 after connection to achieve abutment and locking.

[0045] Specifically, the locking head 33 and the connecting post 32 are integrally formed. The locking head 33 is constructed as a cylindrical head, which makes it easy to process and reduce the difficulty of processing.

[0046] In conjunction with the above embodiments, such as Figure 10 As shown, there is a receiving space 123 between the protrusion 121 and the connector bracket 11, which is used to accommodate the limiting part 31. In this embodiment, when locking, it is necessary to rotate the locking member 3 so that the direction of the limiting part 31 is perpendicular to the direction of the limiting hole 122, thereby achieving the limiting. In this embodiment, the setting of the receiving space 123 facilitates the rotation of the limiting part 31.

[0047] Specifically, such as Figure 10As shown, the protrusion 121 is integrally formed with the busbar body 12, and the accommodating space 123 is located below the protrusion 121. After the limiting part 31 passes the limiting hole 122, the limiting part 31 is located entirely within the accommodating space 123, and the limiting part 31 is limited by rotating the locking member 3.

[0048] It is understandable that by using the limiting part 31, the contact area between the limiting part 31 and the bracket of the protrusion 121 can be increased within a limited space, thereby improving the locking stability of the limiting part 31.

[0049] In some embodiments, the connector bracket 11 includes a supporting connecting plate, and a plurality of busbar bodies 12 are spaced apart on both sides of the supporting connecting plate along the length direction, with a gap between adjacent busbar bodies 12. By having a plurality of busbar bodies 12 arranged along the length direction, the distribution range of the protrusions 121 can be increased, thereby improving the connection stability between the module cover 2 and the busbar assembly 1.

[0050] Specifically, multiple busbar assemblies 1 are spaced apart on both sides of the support connecting plate along its length, and each busbar assembly 1 is fixedly connected by a locking member 3. This results in a large distribution range of the locking member 3's operating position, which can cover the entire module cover 2, thereby improving the stability of the module cover 2 connection.

[0051] It is understandable that the module cover 2 is a rectangular thin block structure. The module cover 2 needs to be stably connected to the busbar assembly 1. In this embodiment, the arrangement of multiple busbar bodies 12 makes the locking action points of the locking member 3 more widely distributed, thereby improving the stability of the connection of the module cover 2.

[0052] In some embodiments, such as Figure 2 , Figure 6 , Figure 7 As shown, the connector bracket 11 has a plug-in module 14 at its first end, and limiting posts 13 are provided on both sides of the plug-in module 14. Each limiting post 13 includes a smooth rod 131 and a limiting head 132. The limiting head 132 is located at the top of the smooth rod 131, and its diameter is larger than that of the smooth rod 131. The limiting post 13 engages with the limiting groove 22 to achieve stability of the end connection. In this embodiment, by providing a limiting post 13 at one end of the plug-in module 14, the stability of one end of the plug-in module 14 can be improved, thus enhancing the overall stability of the product.

[0053] Specifically, the limiting head 132 and the smooth rod post 131 are integrally formed. The limiting head 132 is roughly spherical in shape, and the diameter of the limiting head 132 is larger than the diameter of the smooth rod post 131. This allows the limiting post 13 to be axially limited, thereby improving the engagement stability between the limiting post 13 and the limiting groove 22.

[0054] In this embodiment, the overall shape of the limiting groove 22 is not limited, as long as it can be engaged with the smooth rod post 131. For example, the limiting groove 22 can be a straight groove, an elliptical groove, an inverted conical groove, etc.

[0055] It is understandable that one end of the plug-in module 14 is used relatively frequently, which places higher demands on the stability of that end. In this embodiment, by providing limiting posts 13 on both sides of the plug-in module 14 and using limiting holes 122 corresponding to the limiting posts 13 to achieve a fixed connection at the end, the overall stability of the product is improved.

[0056] In conjunction with the above embodiments, such as Figure 4 , Figure 5 As shown, the limiting groove 22 includes a circular hole groove segment 222 and a straight groove segment 221. The straight groove segment 221 communicates with the circular hole groove segment 222, and the groove width of the straight groove segment 221 is smaller than the diameter of the circular hole in the circular hole groove segment 222. When the limiting post 13 is engaged with the limiting groove 22, in order to further improve the stability of the engagement, this embodiment achieves the limiting of the limiting post 13 through the cooperation of the straight groove segment 221 and the circular hole groove segment 222.

[0057] Specifically, the width of the straight groove segment 221 is smaller than the diameter of the smooth rod segment 131. This requires the smooth rod segment 131 to be engaged into the circular hole groove segment 222 by external force, and the engagement is achieved within the circular hole groove segment 222. This method improves the stability of the connection of the limiting post 13, resulting in a higher structural stability for the overall fixed connection.

[0058] In conjunction with the above embodiments, the limiting post 13 and the limiting groove 22 are interference-fitted. The interference fit between the limiting post 13 and the limiting groove 22 can improve the stability of their connection, increase the structural strength of the assembly, and enable it to withstand greater external impacts.

[0059] Specifically, the diameter of the smooth rod 131 of the limiting post 13 is slightly larger than the diameter of the circular hole groove section 222, so that it can be stably engaged after passing through the straight groove section 221 and then being inserted into the circular hole groove section 222.

[0060] The second aspect of this utility model provides an electric battery pack, including the knife battery module provided in any of the above embodiments.

[0061] Specifically, the battery pack provided in this example has the battery module of any of the aforementioned embodiments. Therefore, the battery pack in this example has the characteristic effects of each of the aforementioned battery modules. To avoid redundancy in the effect description, it will not be repeated here.

[0062] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment designs a protrusion 121 and opens a limiting hole 122 on the busbar body 12, and simultaneously opens a locking hole 21 at the corresponding position of the module cover 2. When installing the module cover 2, a limiting groove 22 is provided at the end of the module cover 2, which is engaged and positioned with the limiting post 13 on the busbar assembly 1; and by using the cooperation of the locking member 3 with the limiting hole 122 and the locking hole 21, the module cover 2 is fixed to the busbar assembly 1, which improves the fixing strength of the module cover 2 and can effectively solve the problem of vibration failure in actual working conditions.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery module, characterized in that, include: A bus assembly includes a connector bracket and multiple bus bodies, the multiple bus bodies being disposed on the connector bracket; at least one end of the connector bracket is provided with a limiting post, and each bus body is provided with a protrusion, the protrusion having a limiting hole; The module cover has a limiting groove at at least one end, which engages with the limiting post. The module cover also has multiple locking holes, which correspond one-to-one with the limiting holes and form a locking space. A locking element that engages with the locking space to secure the module cover to the busbar assembly.

2. The battery module according to claim 1, characterized in that, The locking component includes a limiting part, a connecting post, and a locking head. The limiting part and the locking head are connected through the connecting post, and the limiting part cooperates with the limiting hole for limiting, while the locking head cooperates with the locking hole for locking.

3. The battery module according to claim 2, characterized in that, The limiting hole is constructed as an elongated hole, and the corresponding limiting part is constructed as an elongated structure, with the length of the limiting part being less than the diameter of the locking hole.

4. The battery module according to claim 3, characterized in that, The locking head is constructed in a cylindrical shape, and the diameter of the locking head is larger than the diameter of the locking hole.

5. The battery module according to claim 2, characterized in that, There is a receiving space between the protrusion and the connector bracket, and the receiving space is used to accommodate the limiting part.

6. The battery module according to claim 1, characterized in that, The connector bracket includes a support connecting plate, and a plurality of busbar bodies are spaced apart on both sides of the support connecting plate in the length direction, with a gap between adjacent busbar bodies.

7. The battery module according to claim 1, characterized in that, The connector bracket has a plug-in module at its first end, and the limiting posts are provided on both sides of the plug-in module; The limiting post includes a smooth rod and a limiting head. The limiting head is located at the top of the smooth rod, and the diameter of the limiting head is larger than the diameter of the smooth rod.

8. The battery module according to claim 7, characterized in that, The limiting groove includes a circular hole groove segment and a straight groove segment. The straight groove segment is connected to the circular hole groove segment, and the groove width of the straight groove segment is smaller than the diameter of the circular hole in the circular hole groove segment.

9. The battery module according to claim 7, characterized in that, The limiting post and the limiting groove are interference-fitted.

10. A battery pack, characterized in that, Includes the battery module as described in any one of claims 1-9.

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