Battery module and battery pack

Abstract

The utility model provides a battery module and a battery pack, and belongs to the technical field of new energy. The battery cell frame is provided with a first end plate, a first side plate, a second end plate and a second side plate which are sequentially arranged around the side surface of the battery cell; the bottom ends of the first end plate, the second end plate, the first side plate and the second side plate are at least partially provided with first folding edges extending towards the bottom of the battery cell, and the first folding edges are used for supporting the bottom of the battery cell; according to the battery module disclosed by the utility model, the battery cell frame only comprises the first end plate, the first side plate, the second end plate and the second side plate, and the bottom of the battery cell is supported by the first folding edge, so that a bottom plate of the battery cell frame is omitted, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and particularly relates to a battery module and a battery pack. Background Art

[0002] Currently, the battery modules in the industry need to be packaged and designed. Among them, the battery module includes battery cells and a frame wrapped outside the battery cells. In the prior art, the frame generally forms a drawer structure, that is, it has a bottom plate and side plates that form a closed structure around the bottom plate.

[0003] However, the frame of the prior art, which adopts the structure of combining side plates and a bottom plate, has the disadvantages of more materials used, poor sealing performance, and inability to be lightweight, thus resulting in higher production costs. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the present utility model is to overcome the defect of the relatively high cost of the frame of the battery module in the prior art, so as to provide a battery module and a battery pack.

[0005] To solve the above technical problem, the present utility model provides a battery module, which is arranged in a box body and includes:

[0006] Battery cells;

[0007] A battery cell frame, having a first end plate, a first side plate, a second end plate, and a second side plate sequentially arranged around the side of the battery cell;

[0008] At least part of the bottom ends of the first end plate, the second end plate, the first side plate, and the second side plate are provided with first flanges extending towards the bottom of the battery cell, and the first flanges are used to support the bottom of the battery cell.

[0009] Optionally, the bottom ends of the first side plate and the second side plate further have second flanges extending outwards away from the bottom of the battery cell, and the second flanges are used to cooperate with the guide grooves in the box body for limiting.

[0010] Optionally, both the first side plate and the second side plate include: a shoulder side plate and a bottom side plate which are separately arranged up and down, and the first flange and the second flange are both arranged on the bottom side plate.

[0011] Optionally, the shoulder side plate has a flanging structure extending outwards away from the battery cell, and the flanging structure is used to support the positive and negative aluminum bars.

[0012] Optionally, buffer materials are respectively arranged between the first end plate and the second end plate and the battery cell; and / or, insulating sheets are respectively arranged between the first side plate and the second side plate and the battery cell.

[0013] Optionally, an integrated busbar is provided on the top surface of the battery cell. The integrated busbar is connected to the battery cell frame, and a blister upper cover is provided on the integrated busbar. The blister upper cover is fixedly connected to the integrated busbar by a buckle.

[0014] Optionally, a battery management system is connected to the outer side of the first side plate. The battery management system includes a circuit board and a protective cover. The circuit board is fixedly connected inside the protective cover, and the protective cover is connected to the battery cell frame by a fastener.

[0015] The present utility model provides a battery pack, comprising:

[0016] A box body, the box body having a cylindrical body with a hollow inner cavity;

[0017] The battery module according to any one of the above solutions, the battery module being disposed inside the cylindrical body.

[0018] Optionally, the bottom side surface of the cylindrical body has two spaced convex ribs extending in the depth direction. Guide grooves are formed on the convex ribs, and the second folded edge of the battery module is slidably inserted into the guide grooves.

[0019] Optionally, further comprising:

[0020] A front panel, the front panel being sealingly disposed on the first end plate of the battery module;

[0021] A connector assembly, the connector assembly being sealingly disposed on the front panel; the connector assembly includes: a connector body and a connector protective cover. The connector body and the connector protective cover are mounted on the front panel, and the connector protective cover covers the outside of the connector body;

[0022] A plastic protective cover, the plastic protective cover being mounted on the front panel for covering the outside of the connector assembly to seal the connector assembly.

[0023] The technical solution of the present utility model has the following advantages:

[0024] 1. For the battery module provided by the present utility model, the battery cell frame only includes a first end plate, a first side plate, a second end plate and a second side plate, which is equivalent to only having the side plates of the prior art. The bottom of the battery cell is supported by the first folded edge on the side plate, thus omitting the bottom plate of the battery cell frame and saving costs.

[0025] 2. For the battery pack provided by the present utility model, due to the adoption of the above battery module, it has all its advantages; in addition, for the battery pack provided by the present utility model, a cylindrical box body is adopted, saving the sealing cost and having a more beautiful appearance, meeting the product requirements of the high-end market. Description of the Drawings

[0026] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a three-dimensional exploded view of a specific embodiment of the battery module provided in the embodiment of the present utility model;

[0028] Figure 2 It is a three-dimensional exploded view of a specific embodiment of the battery pack provided in the embodiment of the present utility model;

[0029] Figure 3 It is Figure 2 the assembly schematic diagram of the battery pack in

[0030] Explanation of the reference numerals:

[0031] 1. Battery cell; 2. First end plate; 3. First side plate; 4. Second end plate; 5. Second side plate; 6. First folded edge; 7. Second folded edge; 8. Shoulder side plate; 9. Bottom side plate; 10. Flanging structure; 11. Integrated busbar; 12. Blister upper cover; 13. Battery management system; 14. Cylindrical body; 15. Rib; 16. Guide groove; 17. Support rib; 18. Front panel; 19. Connector body; 20. Connector protection cover; 21. Plastic protection cover; 22. Heating film; 23. Support foam. Specific embodiments

[0032] The following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0033] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is 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 of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "coupling" 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 components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0035] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0036] As Figure 1 shown, a specific embodiment of the battery module provided in this embodiment includes: a battery cell 1 and a battery cell frame. The battery cells 1 can be multiple arranged in parallel. When multiple battery cells 1 are arranged in parallel, the multiple battery cells 1 can be isolated by isolation members such as epoxy boards and foams; the battery cell frame has a first end plate 2, a first side plate 3, a second end plate 4, and a second side plate 5 sequentially arranged around the side of the battery cell 1. Specifically, the first end plate 2, the first side plate 3, the second end plate 4, and the second side plate 5 can be connected by welding or can be fixedly connected by fasteners such as bolts.

[0037] At least part of the bottom ends of the first end plate 2, the second end plate 4, the first side plate 3, and the second side plate 5 are provided with first flanges 6 extending towards the bottom of the battery cell 1. The first flanges 6 are used to support the bottom of the battery cell 1. Specifically, in this embodiment, the bottom ends of the first side plate 3 and the second side plate 5 have symmetric first flanges 6 extending towards the bottom of the battery cell 1. Through the arrangement of the first flanges 6, it is used to support the bottom of the battery cell 1, and the bottom plate of the battery cell frame can be omitted, thereby saving the cost of the battery cell frame.

[0038] Of course, the above description is not restrictive. In some alternative embodiments, the first flanges 6 can also be provided on the first end plate 2 and the second end plate 4, or the first flanges 6 can be provided at the bottom ends of the first end plate 2, the second end plate 4, the first side plate 3, and the second side plate 5 to better support the battery cell 1.

[0039] As Figure 1As shown in the figure, in the battery cell 1 module provided in this embodiment, the bottoms of the first side plate 3 and the second side plate 5 further have second flanges 7 that extend outward away from the bottom of the battery cell 1. The second flanges 7 are used to cooperate with the guide grooves 16 in the box body for limiting. Through this setting, the battery cell 1 module can be inserted into the box body and remain stable in the box body. Of course, the above description is not restrictive. In some alternative embodiments, the second flanges 7 can be omitted; or, the second flanges 7 can be replaced with a chute structure, and corresponding convex plates are arranged inside the box body to perform sliding limit in the chute, etc.

[0040] As Figure 1 shown in the figure, in the battery module provided in this embodiment, both the first side plate 3 and the second side plate 5 include: a shoulder side plate 8 and a bottom side plate 9 that are separately arranged up and down. Among them, the bottom side plate 9 is made of an extruded aluminum part, and the first flange 6 and the second flange 7 are both arranged on the bottom side plate 9. Through the setting of the bottom side plate 9, it can be better matched with the box body that is also made of an extruded aluminum part. The first side plate 3 and the second side plate 5 are set in the form of a shoulder side plate 8 and a bottom side plate 9 (T-shaped structure), omitting the bottom plate. Moreover, the shoulder side plate 8 is made of sheet metal, and the bottom side plate 9 is made of an extruded aluminum part (because the bottom side plate 9 needs to be matched with the box body made of an extruded aluminum part), so the cost can be reduced. Of course, the above description is not restrictive. In some alternative embodiments, the first side plate 3 and the second side plate 5 can also be integrally formed structures. For example, they are all made of extruded aluminum parts as a whole.

[0041] As Figure 1 shown in the figure, in this embodiment, the shoulder side plate 8 can be made of a sheet metal part, and the shoulder side plate 8 has a flanging structure 10 that extends outward away from the battery cell 1. The flanging structure 10 is used to support the positive and negative aluminum bars. Specifically, the flanging structure 10 can be formed by folding upward from the bottom end of the shoulder side plate 8. Through the setting of the shoulder side plate 8, the battery cell 1 can be wrapped, and at the same time, through the setting of the flanging structure 10, it can be used to support the positive aluminum bar and the negative aluminum bar of the battery module; in this embodiment, the positive and negative aluminum bars are used to be electrically connected to the integrated bus bar 11, and the integrated bus bar 11 is the acquisition and integration part of the battery module, abbreviated as CCS.

[0042] As Figure 1 shown in the figure, in the battery module provided in this embodiment, buffers are respectively arranged between the first end plate 2 and the second end plate 4 and the battery cell 1. Through the setting of the buffers, the impact on the battery cell 1 can be reduced. Specifically, the buffers can be made of foam, etc.

[0043] As Figure 1As shown, in the battery module provided in this embodiment, insulating sheets are respectively provided between the first side plate 3 and the second side plate 5 and the battery cell 1. By providing this insulating sheet, electrical connection between the side plate and the battery cell 1 can be avoided. Specifically, the insulating sheet can be a PC insulating sheet or the like.

[0044] As Figure 1 shown, in the battery module provided in this embodiment, an integrated busbar 11 is provided on the top surface of the battery cell 1. The integrated busbar 11 is connected to the battery cell frame. A plastic upper cover 12 is provided on the integrated busbar 11. The plastic upper cover 12 and the integrated busbar 11 are fixedly connected by a buckle. Specifically, the plastic upper cover 12 and the integrated busbar 11 can be clamped and fixed by mushroom buttons. Of course, the above description is not restrictive. In some alternative embodiments, the plastic upper cover 12 and the integrated busbar 11 can also be connected by other structures. For example, they can be connected by bolts or by bonding.

[0045] As Figure 2 shown, in the battery module provided in this embodiment, a heating film 22 is provided at the bottom of the battery cell 1. The heating film 22 can be in contact connection with the bottom of the battery cell 1 by pasting. The heating film 22 is used to heat the battery cell 1 to control the temperature of the battery cell 1. A support foam 23 is provided at the bottom of the heating film 22. By providing the support foam 23, it is used to prevent the heating film 22 from falling off. Of course, the above description is not restrictive. In some alternative embodiments, the heating film 22 and the support foam 23 can be omitted.

[0046] As Figure 2 shown, in the battery module provided in this embodiment, a battery management system 13 is connected to the outside of the first side plate 3. The battery management system 13 is abbreviated as BMS. During operation, it is used to collect parameters such as the voltage, current, and temperature of the battery cell 1 and monitor and judge the state of the battery. The battery management system 13 includes a circuit board and a protective cover. The circuit board is fixedly connected inside the protective cover. The protective cover is connected to the battery cell frame by fasteners. Specifically, the circuit board can be fixedly connected inside the protective cover by bolts. The protective cover can be fixed to the first side plate 3 of the battery cell frame by bolts and buckles. Of course, the above description is not restrictive. In some alternative embodiments, the circuit board can be connected to the protective cover in other forms. For example, it can be connected by a buckle or by bonding. The protective cover can also be connected to the battery cell frame in other forms. For example, it can be connected by bonding. It should be noted that in the present invention, the installation position of the battery management system 13 is not limited to the outside of the first side plate 3 as Figure 3 shown, for example, it can also be installed as Figure 3The outer side of the second side plate 5 shown in

[0047] As Figure 2 shown, in this embodiment, in the battery management system 13, there is an insulating sheet between the circuit board and the first side plate 3 for protecting the safety of the circuit board.

[0048] As Figure 3 shown, this embodiment also provides a specific implementation of a battery pack, including: a box body and the battery module described in the above embodiment. The box body has a cylindrical body 14 with a hollow inner cavity, and the battery module is arranged inside the cylindrical body 14. By providing a cylindrical box body with a hollow structure, only the two ends need to be sealed. The battery pack provided in this embodiment uses a cylindrical box body, which saves the sealing cost and has a more beautiful appearance, meeting the product requirements of the high-end market.

[0049] As Figure 3 shown, in this embodiment, on the bottom side surface of the cylindrical body 14 of the box body, there are two spaced convex ribs 15 extending in the depth direction, and guide grooves 16 are formed on the convex ribs 15. The second folded edge 7 of the battery module is slidably inserted into the guide grooves 16. Through the arrangement of the guide grooves 16, the battery module can be limited and guided during the process of being inserted into the box body, so as to realize the limited installation of the battery module and the cylindrical body 14, facilitating the pushing or pulling of the battery module into or out of the cylindrical body 14 and reducing the friction of the battery module on the bottom surface of the cylindrical body 14.

[0050] As Figure 3 shown, in this embodiment, inside the cylindrical body 14 of the box body, on an inner side wall facing the bottom surface of the battery module, several support ribs 17 are provided. Through the support ribs 17, the battery module can be supported, thereby further reducing the friction of the battery module on the bottom surface of the cylindrical body 14 and facilitating the pushing and pulling of the battery module inside the cylindrical body 14. Of course, the above description is not restrictive. In some alternative embodiments, the support ribs 17 can be omitted.

[0051] As Figure 2As shown in the figure, the battery pack provided in this embodiment further includes a front panel 18 and a connector assembly. The front panel 18 is sealingly disposed on the first end plate 2 of the battery module, and the connector assembly is sealingly disposed on the front panel 18. The connector assembly includes a connector body 19 and a connector protective cover 20. The connector body 19 and the connector protective cover 20 are mounted on the front panel 18, and the connector protective cover 20 covers the outside of the connector body 19. Specifically, a first sealing member is provided between the connector protective cover 20 and the front panel 18 to seal the connector body 19 through the first sealing member. Through this setting, the connector body 19 can be waterproof sealed to make the connector body 19 reach the IP65 protection level.

[0052] As Figure 2 As shown in the figure, the battery pack provided in this embodiment further includes a plastic protective cover 21. The plastic protective cover 21 is mounted on the front panel 18 and is used to cover the outside of the connector assembly to seal the connector assembly. Specifically, a second sealing member is provided between the plastic protective cover 21 and the front panel 18 to seal the connector body 19 through the second sealing member. Through this setting, the sealing effect on the connector can be further improved. Of course, the above description is not restrictive. In some alternative embodiments, the plastic protective cover 21 can be omitted.

[0053] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A battery module, arranged in a box, characterized in that: include: Battery cell (1); A cell frame, comprising a first end plate (2), a first side plate (3), a second end plate (4) and a second side plate (5) which are sequentially arranged around the side surface of the cell (1); The bottom ends of the first end plate (2), the second end plate (4), the first side plate (3) and the second side plate (5) are at least partially provided with a first folded edge (6) extending towards the bottom of the battery cell (1), and the first folded edge (6) is used to support the bottom of the battery cell (1).

2. The battery module according to claim 1, characterized in that: The bottom ends of the first side plate (3) and the second side plate (5) also have a second folded edge (7) extending outwardly away from the bottom of the battery cell (1), and the second folded edge (7) is used to cooperate with the guide groove (16) in the box body for limiting.

3. The battery module according to claim 2, characterized in that: The first side panel (3) and the second side panel (5) both comprise: a shoulder side panel (8) and a bottom side panel (9) which are arranged in upper and lower parts, and the first folded edge (6) and the second folded edge (7) are both arranged on the bottom side panel (9).

4. The battery module according to claim 3, characterized in that: The shoulder plate (8) has a flange structure (10) extending outward away from the battery core (1), and the flange structure (10) is used to support the positive and negative aluminum bars.

5. The battery module according to any one of claims 1 to 4, characterized in that: Buffers are provided between the first end plate (2) and the second end plate (4) and the battery core (1), respectively; and / or insulating sheets are provided between the first side plate (3) and the second side plate (5) and the battery core (1), respectively.

6. The battery module according to any one of claims 1 to 4, characterized in that: An integrated busbar (11) is provided on the top surface of the battery cell (1), the integrated busbar (11) is connected to the battery cell frame, a blister cover (12) is provided on the integrated busbar (11), and the blister cover (12) is fixedly connected to the integrated busbar (11) by means of buckles.

7. The battery module according to any one of claims 1 to 4, characterized in that: A battery management system (13) is connected to the outer side of the first side plate (3), the battery management system (13) comprising a circuit board and a protective cover, the circuit board is fixedly connected inside the protective cover, and the protective cover is connected to the battery cell frame via a fastener.

8. A battery pack, characterized in that: include: A casing, the casing having a cylindrical body (14) with a hollow inner cavity; The battery module according to any one of claims 1 to 7, wherein the battery module is arranged in the cylindrical body (14).

9. The battery pack according to claim 8, characterized in that: The bottom side surface of the cylindrical body (14) has two spaced convex ribs (15) extending in the depth direction, and a guide groove (16) is formed on the convex rib (15), and the second folded edge (7) of the battery module is slidably inserted in the guide groove (16).

10. The battery pack according to claim 8 or 9, characterized in that: Also includes: A front panel (18), the front panel (18) being sealingly disposed on the first end plate (2) of the battery module; A connector assembly, the connector assembly being sealed and arranged on the front panel (18); the connector assembly comprising: a connector body (19) and a connector protection cover (20), the connector body (19) and the connector protection cover (20) being installed on the front panel (18), and the connector protection cover (20) being arranged outside the connector body (19); A plastic protective cover (21), the plastic protective cover (21) is installed on the front panel (18) and is used to cover the outside of the connector assembly to seal the connector assembly.

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