Soft package battery module and battery pack

Abstract

The utility model relates to the technical field of batteries, and discloses a soft package battery module and a battery pack, the soft package battery module comprises a tab welding support piece and a support frame, the surface of the support frame is provided with an accommodating groove, the side surface of the support frame is provided with an insertion notch communicated with the accommodating groove, the insertion notch is positioned at one end of the accommodating groove, the other end of the accommodating groove is provided with a wedging groove, and the wedging groove is provided with a plurality of tabs. A wedging part is arranged at the first end of the tab welding support piece; and the second end of the tab welding support piece is provided with a limiting boss for limiting the end surface of the tab welding support piece from entering the insertion notch. According to the utility model, the first end of the tab welding support piece is inserted into the accommodating groove from the position of the insertion notch until the wedging part is wedged with the wedging groove, and at the moment, the limiting boss at the second end of the tab welding support piece is attached to the side surface provided with the insertion notch, so that the connection and fixation of the tab welding support piece and the support frame are completed; compared with the traditional hot riveting process, the production time is greatly shortened in a manner of directly inserting and installing the tab welding support piece.

Description

Technical Field

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

[0002] At present, the soft-pack battery module for two-wheeled vehicles includes a base, a support frame, multiple soft-pack battery cells and multiple tab welding supports. The multiple soft-pack battery cells are arranged between the base and the support frame. The positive tab or negative tab of the soft-pack battery cell is inserted into the support frame and bent and welded to the tab welding support fixed on the support frame. However, the existing tab welding support is riveted to the support frame through a hot riveting process. When a tab welding support is riveted to the support frame, it is necessary to set multiple rivet columns on the support frame. The tab welding support is fixed to the support frame by hot melting the rivet columns one by one. This will cause the assembly time of the soft-pack battery module to be too long, and the production will be time-consuming and costly. In addition, the heat dissipation method of the existing soft-pack battery module is usually natural heat dissipation, but natural heat dissipation is difficult to meet the requirements of some high-performance battery systems. Utility Model Content

[0003] One of the main purposes of the present utility model is to provide a soft-pack battery module and a battery pack, which aims to solve the problem that the existing pole ear welding support is riveted to the support frame through a hot riveting process, resulting in a long assembly time of the soft-pack battery module and time-consuming and costly production.

[0004] In order to achieve the above-mentioned objectives, in the first aspect, the utility model provides a soft-pack battery module, including a tab welding support and a support frame, a receiving groove is provided on the surface of the support frame, an insertion groove communicated with the receiving groove is opened on the side of the support frame, the insertion groove is located at one end of the receiving groove, and a fitting groove is provided at the other end of the receiving groove, a fitting portion is provided at the first end of the tab welding support, and the fitting portion can be inserted into the receiving groove through the insertion groove and fit and fixed with the fitting groove, and a limiting boss is provided at the second end of the tab welding support for limiting the end face of the second end from entering the insertion slot.

[0005] Furthermore, an insulating protrusion is provided on the side surface of the support frame where the insertion slot is provided, and the insulating protrusion extends to the outside of the end surface of the limiting boss facing away from the fitting portion.

[0006] Furthermore, two spaced connecting blocks are provided at one end of the accommodating groove facing away from the insertion slot, the connecting blocks and the accommodating groove are perpendicular to each other in the horizontal direction, the spacing between the two connecting blocks is a plug-in groove, the matching groove includes the plug-in groove; the matching portion includes a plug-in portion adapted to the plug-in groove.

[0007] Furthermore, the mating groove also includes an eight-shaped groove, and the end surfaces of the two connecting blocks facing the insertion groove are provided with inclined surfaces, and the spacing between the two inclined surfaces forms the eight-shaped groove, and the eight-shaped groove is coaxial and communicated with the plug-in slot; the mating portion also includes an inclined portion and a connecting portion, the inclined portion connects the plug-in portion and the connecting portion, the connecting portion is connected and fixed to the pole ear welding support, and the two relative inclined surfaces of the inclined portion are mated with the inclined surfaces on the two connecting blocks.

[0008] Furthermore, an insulating protrusion is provided on the side surface of the support frame where the insertion slot is provided, and the insulating protrusion extends to the outside of the end surface of the limiting boss facing away from the fitting portion.

[0009] Furthermore, the connection between the inclined portion and the plug-in portion and the connecting portion is an arc transition connection.

[0010] Furthermore, the soft-pack battery cell module of the utility model also includes a heat dissipation base and a soft-pack battery cell, the soft-pack battery cell is arranged between the heat dissipation base and the support frame, the accommodating groove is located on the side of the support frame facing away from the heat dissipation base, and the support frame is also provided with a pole ear outlet groove which is communicated with the accommodating groove and parallel to the pole ear of the soft-pack battery cell, the positive pole ear or negative pole ear of the soft-pack battery cell is inserted into the accommodating groove through the pole ear outlet groove and can be bent and welded to the pole ear welding support.

[0011] Furthermore, a plurality of heat dissipation cavities are provided on a surface of the heat dissipation base facing the soft-pack battery core, the heat dissipation cavities are filled with heat dissipation material, and upper surfaces of the plurality of heat dissipation cavities are sealed and connected to a heat dissipation base plate.

[0012] Furthermore, two mutually intersecting reinforcing plates are provided in the heat dissipation cavity.

[0013] Furthermore, a thermally conductive silicone layer is coated between the heat dissipation base plate and the soft-pack battery core.

[0014] Furthermore, a mounting portion for connecting with a battery housing is also provided on the outer peripheral wall of the heat dissipation base.

[0015] Furthermore, an isolation portion is provided between two adjacent accommodating grooves, and an extending direction of the isolation portion is the same as an extending direction of the accommodating grooves.

[0016] In a second aspect, the utility model provides a battery pack, comprising a battery housing and the soft-pack battery module described in the first aspect of the present application, wherein the soft-pack battery module is disposed in the battery housing.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] When assembling the soft-pack battery module of the utility model, the first end of the pole ear welding support is inserted into the accommodating groove from the position of the insertion slot until the fitting portion fits with the fitting groove. At this time, the limiting boss at the second end of the pole ear welding support fits with the side of the insertion slot set on the support frame, thereby completing the connection and fixation of the pole ear welding support and the support frame. Compared with the traditional hot riveting process, the utility model directly inserts and installs the pole ear welding support, which greatly shortens the production time. In addition, the insertion and installation of the pole ear welding support can be automated by a robot, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an exploded view of the soft-pack battery module of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the support frame involved in the embodiment of the utility model;

[0021] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0022] Figure 4 This is a schematic diagram of the structure of a tab welding support member according to an embodiment of the utility model;

[0023] Figure 5 It is a schematic structural diagram of a heat dissipation base according to an embodiment of the utility model.

[0024] Reference numerals in the accompanying drawings:

[0025] 1. Support frame; 10. Insertion slot; 11. Accommodation slot; 110. Ear outlet slot; 12. Fitting groove; 120. Slot; 121. Plug slot; 13. Connecting block; 14. Insulating protrusion; 15. First area; 16. Second area; 2. Ear welding support; 20. Fitting part; 201. Plug part; 202. Inclined part; 203. Connecting part; 21. Limiting boss; 3. Battery cell stack; 30. Soft-pack battery cell; 301. Positive ear; 302. Negative ear; 4. Isolation part; 5. Heat dissipation base; 50. Heat dissipation cavity; 500. Reinforcement plate; 51. Heat dissipation bottom plate; 52. Mounting part; 520. Mounting hole. DETAILED DESCRIPTION

[0026] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] In the description of the present invention, it should be understood that the terms "width", "up", "down", "front", "back", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying 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 a limitation on the present invention.

[0028] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", and "set" 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, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] Please refer to Figure 1-Figure 5In the first aspect, the utility model provides a soft-pack battery module, including a tab welding support 2 and a support frame 1, a receiving groove 11 is provided on the surface of the support frame 1, an insertion groove 10 communicating with the receiving groove 11 is opened on the side of the support frame 1, the insertion groove 10 is located at one end of the receiving groove 11, and a fitting groove 12 is provided at the other end of the receiving groove 11, a fitting portion 20 is provided at the first end of the tab welding support 2, the fitting portion 20 can be inserted into the receiving groove 11 through the insertion groove 10 and fit and fixed with the fitting groove 12, and a limiting boss 21 is provided at the second end of the tab welding support 2, and the limiting boss 21 is used to limit the end face of the second end of the tab welding support 2 from entering the insertion slot 10. It can be seen that when assembling the soft-pack battery module of the utility model, the first end of the pole tab welding support 2 is inserted into the accommodating groove 11 from the position of the insertion notch 10, and the fitting portion 20 is fitted with the fitting groove 12. At this time, the limiting boss 21 at the second end of the pole tab welding support 2 is fitted with the side of the insertion notch 10 set on the support frame 1, and the connection and fixation of the pole tab welding support 2 and the support frame 1 can be completed. Compared with the traditional hot riveting process, the method of directly inserting and installing the pole tab welding support 2 in this application greatly shortens the production time. In addition, the insertion and installation of the pole tab welding support 2 can be automated by a manipulator, which improves production efficiency.

[0031] In one embodiment, referring to Figure 2 The side of the support frame 1 where the insertion slot 10 is provided is also provided with an insulating protrusion 14. The material of the support frame 1 is generally an insulating material such as plastic, and the insulating protrusion 14 is integrally formed with the support frame 1. The insulating protrusion 14 extends to the outside of the end surface of the limiting boss 21 facing away from the fitting portion 20. In this way, when the soft-pack battery module is installed in the battery metal shell, the insulating protrusion 14 can effectively prevent the tab welding support 2 from contacting the battery metal shell, thereby effectively avoiding the occurrence of short-circuit faults and eliminating safety hazards.

[0032] In one embodiment, referring to Figure 2 and Figure 3, one end of the receiving groove 11 facing away from the insertion slot 10 is provided with two spaced connecting blocks 13, and the connecting blocks 13 can be welded to the support frame 1. The connecting blocks 13 and the receiving groove 11 are perpendicular to each other in the horizontal direction, and the two connecting blocks 13 are provided with inclined surfaces on the end faces facing the insertion slot 10, and the spacing between the two inclined surfaces is an eight-shaped groove 120, and the spacing between the two connecting blocks 13 is also provided with a plug-in groove 121, and the eight-shaped groove 120 is coaxial and connected with the plug-in groove 121, and the plug-in groove 121 is located at the end of the eight-shaped groove 120 facing away from the insertion slot 10. Of course, the fitting groove 12 includes the eight-shaped groove 120 and the plug-in groove 121, and the fitting groove 12 with such a structure can facilitate the fitting and fixing of the fitting part 20 therewith. In addition, the fitting portion 20 includes an integrally connected plug-in portion 201, an inclined portion 202 and a connecting portion 203, the inclined portion 202 connects the plug-in portion 201 and the connecting portion 203, the connecting portion 203 is connected and fixed to the tab welding support 2, and when the fitting groove 12 is fitted and fixed to the fitting portion 20, the plug-in portion 201 is plugged into the inserting groove 121, and the two relatively inclined surfaces of the inclined portion 202 are fitted with the inclined surfaces on the two connecting blocks 13. In summary, it can be seen that through the above-mentioned structure of the fitting groove 12 and the fitting portion 20, the fitting portion 20 can be easily fitted with the fitting groove 12, and it is also convenient to pull out, replace or repair the tab welding support 2.

[0033] In one embodiment, referring to Figure 4 The connection between the inclined portion 202 and the plug-in portion 201 and the connecting portion 203 is an arc transition connection, which can effectively avoid interference between the fitting portion 20 and the fitting groove 12 during the fitting process, thereby facilitating the fitting of the fitting portion 20 and the fitting groove 12.

[0034] Based on the above structure, refer to Figure 1 The soft-pack battery module of the utility model also includes a heat dissipation base 5 and a soft-pack battery cell 30. The soft-pack battery cell 30 is arranged between the heat dissipation base 5 and the support frame 1. The accommodating groove 11 is located on the side of the support frame 1 facing away from the heat dissipation base 5. The support frame 1 is also provided with a tab outlet groove 110 which is communicated with the accommodating groove 11 and parallel to the tab of the soft-pack battery cell 30. The positive tab 301 or the negative tab 302 of the soft-pack battery cell 30 passes through the tab outlet groove 110 and is inserted into the accommodating groove 11 and can be bent and welded to the tab welding support 2. Specifically, it can be understood that the battery cell is placed on the heat dissipation base 5 and supported by the heat dissipation base 5, the positive pole ear 301 and the negative pole ear 302 of the battery cell are located on one side of the battery cell, and the pole ears of the battery cell are located at the end of the battery cell facing away from the heat dissipation base 5. Taking the welding of the positive pole ear 301 of the battery cell and the pole ear welding support 2 as an example, the positive pole ear 301 of the battery cell passes through the pole ear outlet groove 110 on the support frame 1 and enters the accommodating groove 11, and then the positive pole ear 301 of the battery cell is bent and welded to the pole ear welding support 2, so that the welding of the positive pole ear 301 of the battery cell and the pole ear welding support 2 can be achieved.

[0035] In one embodiment, the number of soft-pack battery cells 30 is set to be multiple, so that the energy density of the soft-pack battery module can be improved. Among them, multiple soft-pack battery cells 30 are stacked on each other in the horizontal direction to form a battery cell stack 3. In addition, the positive pole ear 301 of a battery cell corresponds to a pole ear welding support 2, and the negative pole ear 302 of a battery cell corresponds to a pole ear welding support 2, that is, one battery cell corresponds to two pole ear welding supports 2, and two soft-pack battery cells 30 correspond to four pole ear welding supports 2, and so on.

[0036] In one embodiment, referring to Figure 1 and Figure 2 The side of the support frame 1 facing away from the heat dissipation base 5 is divided into a first area 15 and a second area 16. The tab welding support 2 in the first area 15 corresponds to the positive tab 301 of the soft-pack battery cell 30, and the tab welding support 2 in the second area 16 corresponds to the negative tab 302 of the soft-pack battery cell 30. Figure 1 As shown, illustratively, a plurality of soft-pack battery cells 30 are stacked along a first horizontal direction, and the positive tabs 301 and negative tabs 302 of the soft-pack battery cells 30 are spaced apart along a second horizontal direction. Then, the tab welding supports 2 in the first area 15 on the support frame 1 are also spaced apart along the first horizontal direction, and the tab welding supports 2 in the second area 16 on the support frame 1 are also spaced apart along the first horizontal direction. In this way, the positive tabs 301 of each soft-pack battery cell 30 pass through the tab outlet grooves 110 in the first area 15 and are bent and welded to the tab welding supports 2 in the first area 15. Similarly, the negative tabs 302 of each soft-pack battery cell 30 pass through the tab outlet grooves 110 in the second area 16 and are bent and welded to the tab welding supports 2 in the second area 16.

[0037] It should be noted that since there is an isolation portion 4 between two adjacent accommodating grooves 11, and the extension direction of the isolation portion 4 is the same as the extension direction of the accommodating groove 11, the bending of the tabs of the soft-pack battery cell 30 and welding with the tab welding support 2 can effectively avoid the occurrence of short circuit during assembly.

[0038] In one embodiment, the material of the heat dissipation base 5 is aluminum alloy, which can improve the heat dissipation efficiency of the heat dissipation base 5 to a certain extent. The heat dissipation base 5 has a plurality of heat dissipation cavities 50 on the surface facing the soft-pack battery cell 30, and the heat dissipation cavities 50 are filled with heat dissipation materials. The upper surfaces of the plurality of heat dissipation cavities 50 are sealed and connected with a heat dissipation bottom plate 51, and the heat dissipation bottom plate 51 can be welded to the heat dissipation base 5 to improve the strength of the entire heat dissipation base 5. Figure 5It can be understood by those skilled in the art that the heat dissipation cavity 50 on the heat dissipation base 5 can be filled with heat dissipation materials such as paraffin, acetic acid, etc. in advance, and then the heat dissipation bottom plate 51 and the upper surface of the heat dissipation base 5 are welded and sealed to form an integrated part, so that the heat dissipation bottom plate 51 can seal multiple heat dissipation cavities 50, so that the heat dissipation material is sealed and filled in the heat dissipation cavity 50. Of course, the heat dissipation material is in contact with the heat dissipation bottom plate 51, so that the heat generated by each soft-pack battery cell 30 during operation is transferred to the heat dissipation material and the heat dissipation base 5 through the heat dissipation bottom plate 51, thereby improving the heat dissipation performance of the soft-pack battery module.

[0039] In one embodiment, referring to Figure 5 Two mutually intersecting reinforcing plates 500 are provided in the heat dissipation cavity 50, and the opposite ends of the reinforcing plates 500 are welded to the diagonals in the heat dissipation cavity 50. The strength of the heat dissipation cavity 50 can be strengthened by the reinforcing plates 500. At the same time, the mutually intersecting reinforcing plates 500 can also divide the heat dissipation cavity 50 into multiple heat dissipation material filling cavities. In this way, multiple heat dissipation materials can be filled in the heat dissipation cavity 50, so that the heat dissipation effect of the heat dissipation base 5 is optimized.

[0040] In one embodiment, a thermally conductive silicone layer is coated between the heat dissipation base plate 51 and the soft-pack battery cell 30. The thermally conductive silicone layer has the function of transferring heat. Therefore, the heat generated by the soft-pack battery cell 30 can be quickly transferred to the heat dissipation base plate 51 through the thermally conductive silicone layer, thereby improving the heat dissipation efficiency of the soft-pack battery cell 30.

[0041] In one embodiment, referring to Figure 5 A plurality of mounting portions 52 are fixed to the outer peripheral wall of the heat dissipation base 5, each mounting portion 52 is provided with a mounting hole 520, and the mounting holes 520 on the mounting portion 52 are connected to the battery housing through screws to form a whole. Of course, after the soft-pack battery module of the present application is placed in the battery housing, thermal conductive glue is poured into the battery housing to immerse the battery module, and the heat of the battery module is introduced into the heat dissipation base 5 to achieve the purpose of heat dissipation.

[0042] In a second aspect, the utility model provides a battery pack, including a battery housing and the soft-pack battery module provided in the first aspect of the present application, wherein the soft-pack battery module is disposed in the battery housing. The battery pack provided in the second aspect of the present application includes the soft-pack battery module in the first aspect of the present application, and thus has the technical effects of any one of the above-mentioned first aspect of the present application, which will not be described in detail here.

[0043] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A soft pack battery module, characterized in that: It includes a pole lug welding support and a support frame, a receiving groove is provided on the surface of the support frame, an insertion groove communicated with the receiving groove is opened on the side of the support frame, the insertion groove is located at one end of the receiving groove, and a fitting groove is provided at the other end of the receiving groove, a fitting portion is provided at the first end of the pole lug welding support, and the fitting portion can be inserted into the receiving groove through the insertion groove and fixed in fit with the fitting groove, and a limiting boss is provided at the second end of the pole lug welding support for preventing the end face of the second end of the pole lug welding support from entering the insertion groove.

2. The soft pack battery module according to claim 1, characterized in that: An insulating protrusion is also provided on the side surface of the support frame where the insertion slot is opened, and the insulating protrusion extends to the outside of the end surface of the limiting boss facing away from the fitting portion.

3. The soft pack battery module according to claim 1, characterized in that: Two spaced connection blocks are provided at one end of the accommodating groove facing away from the insertion slot. The connection blocks and the accommodating groove are perpendicular to each other in the horizontal direction. The spacing between the two connection blocks is a plug-in groove. The matching groove includes the plug-in groove; the matching portion includes a plug-in portion adapted to the plug-in groove.

4. The soft pack battery module according to claim 3, characterized in that: The mating groove also includes an eight-shaped groove, and the end surfaces of the two connecting blocks facing the insertion groove are provided with inclined surfaces, and the spacing between the two inclined surfaces forms the eight-shaped groove, and the eight-shaped groove is coaxial with and communicated with the plug-in groove; the mating portion also includes an inclined portion and a connecting portion, the inclined portion connects the plug-in portion and the connecting portion, and the connecting portion is connected and fixed to the pole ear welding support, and the two relatively inclined surfaces of the inclined portion are mated with the inclined surfaces on the two connecting blocks.

5. The soft pack battery module according to claim 4, characterized in that: The connection between the inclined portion and the plug-in portion and the connecting portion is an arc transition connection.

6. The soft pack battery module according to claim 1, characterized in that: It also includes a heat dissipation base and a soft-pack battery cell, the soft-pack battery cell is arranged between the heat dissipation base and the support frame, the accommodating groove is arranged on the side of the support frame facing away from the heat dissipation base, and the support frame is also provided with a pole ear outlet groove which is communicated with the accommodating groove and parallel to the pole ear of the soft-pack battery cell, the positive pole ear or the negative pole ear of the soft-pack battery cell is inserted into the accommodating groove through the pole ear outlet groove and can be bent and welded to the pole ear welding support.

7. The soft pack battery module according to claim 6, characterized in that: The surface of the heat dissipation base facing the soft-pack battery core is provided with a plurality of heat dissipation cavities, the heat dissipation cavities are filled with heat dissipation materials, and the upper surfaces of the plurality of heat dissipation cavities are sealed and connected with a heat dissipation bottom plate.

8. The soft pack battery module according to claim 7, characterized in that: The heat dissipation cavity is provided with reinforcing plates intersecting each other.

9. The soft pack battery module according to claim 7, characterized in that: A thermally conductive silicone layer is coated between the heat dissipation base plate and the soft-pack battery core.

10. The soft pack battery module according to claim 7, characterized in that: The heat dissipation bottom plate and the heat dissipation base are welded into one body.

11. The soft pack battery module according to claim 1, characterized in that: An isolation portion is provided between two adjacent accommodating grooves, and an extending direction of the isolation portion is the same as an extending direction of the accommodating grooves.

12. The soft pack battery module according to claim 6, characterized in that: The outer peripheral wall of the heat dissipation base is also provided with a mounting portion for connecting with the battery housing.

13. A battery pack, characterized in that: It comprises a battery housing and the soft-pack battery module according to any one of claims 1 to 12, wherein the soft-pack battery module is arranged in the battery housing.

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