Busbar assembly and battery module

Abstract

The utility model discloses a bus bar assembly and a battery module, the bus bar assembly comprises an aluminum bar on which a cooling part is formed; the cooling pipe is arranged in the cooling part in a penetrating manner and is positioned between the aluminum bar and the battery cell, a cooling flow channel is formed in the cooling pipe, and cooling liquid can flow in the cooling flow channel. According to the busbar assembly disclosed by the utility model, the cooling flow channel is arranged between the aluminum bar and the battery cell, so that additional cooling equipment is not needed, the heat management efficiency is improved, the problem of heat generated in a high-magnification rapid charging process is effectively solved, the production cost is reduced, the stability and the safety of a battery module are ensured, and the busbar assembly is simple in overall structure and convenient to operate. And production and maintenance are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of battery manufacturing technology, and in particular to a busbar assembly and a battery module. Background Technology

[0002] The relevant technology points out that the demand for charging speed in new energy vehicles is becoming increasingly urgent. While pursuing long driving range, fast charging significantly increases the heat generated by the battery during high-rate fast charging. Most existing battery thermal management systems reduce the temperature of the battery cells by cooling the bottom or sides. Under high-rate charging and discharging conditions, most of the heat of the battery cells is concentrated on the terminals and aluminum bars. Traditional thermal management solutions cannot meet the cooling requirements, thus limiting the fast charging capability. As a result, some manufacturers have adopted a design solution that adds cooling structural components to cool the aluminum bars. This allows the heat generated by the battery cell terminals and aluminum bars to be removed by the cooling system in time, thereby improving the fast charging capability of the system.

[0003] 1. Existing aluminum bar cooling solutions typically use flat metal tubes or cold plates with good thermal conductivity to cool the aluminum bar. Thermally conductive structural adhesive / thermal conductive gel also needs to be applied between the cooling structure and the aluminum bar. The solution is relatively complex and costly to implement.

[0004] 2. If the protection between the cooling structure and the aluminum bar is inadequate or the insulation is damaged, it can easily lead to poor insulation and short circuit problems. Utility Model Content

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a busbar assembly that has good cooling effect, low cost, and high safety.

[0006] This utility model also proposes a battery module having the above-mentioned busbar assembly.

[0007] According to a first aspect of the present invention, a busbar assembly includes: an aluminum bar with a cooling section formed thereon; and a cooling pipe that passes through the cooling section and is located between the aluminum bar and the battery cell, wherein a cooling channel is formed inside the cooling pipe and the cooling channel is suitable for the flow of coolant.

[0008] According to the present invention, the bus assembly improves thermal management efficiency by setting a cooling channel between the aluminum bar and the battery cell, eliminating the need for additional cooling equipment. This effectively solves the heat problem generated during high-rate fast charging, reduces production costs, ensures the stability and safety of the battery module, and has a simple overall structure that is easy to produce and maintain.

[0009] In some embodiments, the cooling section is formed as a groove arched in the thickness direction of the aluminum bar toward the side opposite to the battery cell, the groove extending along the width direction of the aluminum bar and penetrating the aluminum bar, the groove being adapted to the shape of the cooling tube.

[0010] In some embodiments, the groove is formed at one end of the aluminum bar along its length, and the groove includes a first groove portion and a second groove portion, the first groove portion and the second groove portion being arranged spaced apart in the thickness direction of the aluminum bar.

[0011] In some embodiments, the aluminum bar has a first portion and a second portion, and the groove is formed between the first portion and the second portion.

[0012] In some embodiments, one end of the cooling pipe is formed with a water inlet, and the other end of the cooling pipe is formed with a water outlet, both of which are connected to the cooling channel.

[0013] In some embodiments, the bus assembly further includes: a first membrane layer and a second membrane layer, wherein the aluminum bar and the cooling pipe are both disposed between the first membrane layer and the second membrane layer, and the aluminum bar and the cooling pipe are tightly pressed against the first membrane layer and the second membrane layer.

[0014] In some embodiments, a partition groove is formed on the first film layer, the partition groove being located between every two adjacent aluminum bars.

[0015] In some embodiments, the bus assembly further includes a support member disposed between the second membrane layer and the battery cell to support the second membrane layer.

[0016] In some embodiments, the cooling pipe is a silicone tube.

[0017] The battery module according to the second aspect of the present invention includes the bus assembly according to the first aspect of the present invention.

[0018] According to the present invention, by setting the bus assembly of the first aspect, the thermal management performance of the battery module is improved, the heat generated during high-rate fast charging is effectively solved, and the production cost of the battery module is reduced.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a busbar assembly according to an embodiment of the present utility model;

[0021] Figure 2 yes Figure 1 A partial enlarged view of the bus assembly shown;

[0022] Figure 3 yes Figure 1 A schematic diagram of the bus assembly shown from another angle;

[0023] Figure 4 yes Figure 3 A partial enlarged view of the bus assembly shown;

[0024] Figure 5 This is a schematic diagram of the battery module according to an embodiment of the present invention;

[0025] Figure 6 yes Figure 5 A schematic diagram of the battery module from another angle;

[0026] Figure 7 yes Figure 6 A partial enlarged view of the battery module shown;

[0027] Figure 8 yes Figure 5 This is a schematic diagram of the battery module from another angle.

[0028] Figure 9 yes Figure 8 A schematic diagram of the battery module shown from another angle;

[0029] Figure 10 yes Figure 2 A schematic diagram of the aluminum bar shown;

[0030] Figure 11 yes Figure 10 A schematic diagram of the aluminum bar from another angle;

[0031] Figure 12 yes Figure 11 A side view of the aluminum bar shown in the diagram;

[0032] Figure 13 yes Figure 12 The diagram shows the connection between the aluminum bar and the cooling pipe.

[0033] Figure 14 This is a schematic diagram of a battery module according to another embodiment of the present invention;

[0034] Figure 15 yes Figure 14 A schematic diagram of the battery module from another angle;

[0035] Figure 16 yes Figure 14This is a schematic diagram of the battery module from another angle.

[0036] Figure label:

[0037] 100. Busbar assembly; 1. Aluminum bar; 11. Groove; 111. First groove; 112. Second groove; 12. Expansion arch; 13. First part; 14. Second part; 2. Cooling pipe; 21. Inlet; 22. Outlet; 23. Cooling channel; 3. First membrane layer; 31. Separator groove; 4. Second membrane layer; 1000. Battery module; 10. Battery cell. Detailed Implementation

[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0039] The following is for reference. Figures 1-13 A bus assembly 100 according to a first aspect embodiment of the present invention is described.

[0040] like Figures 1-13 As shown, the busbar assembly 100 according to the first aspect of the present invention includes: an aluminum busbar 1 and a cooling pipe 2.

[0041] Specifically, a cooling section is formed on the aluminum bar 1, and a cooling pipe 2 is inserted into the cooling section and located between the aluminum bar 1 and the battery cell 10. A cooling channel 23 is formed inside the cooling pipe 2, which is suitable for the flow of coolant. It can be understood that the cooling pipe 2 is located between the aluminum bar 1 and the battery cell 10, which can more effectively absorb the heat from the aluminum bar 1 and the battery cell 10's terminals, improving cooling efficiency. Compared with the traditional air cooling method, the liquid cooling method has higher heat conduction efficiency. In this way, integrating the cooling function into the busbar assembly 100 reduces the need for additional cooling equipment, making the entire battery pack more compact and helping to improve the space utilization of the power unit.

[0042] According to the embodiment of the present utility model, the bus assembly 100, by setting a cooling channel 23 between the aluminum bar 1 and the battery cell 10, does not require additional cooling equipment, improves thermal management efficiency, effectively solves the heat problem generated during high-rate fast charging, reduces production costs, ensures the stability and safety of the battery module 1000, and has a simple overall structure, which is convenient for production and maintenance.

[0043] In some embodiments, the battery management system (BMS) is tightly integrated with the thermal management system, and the operating temperature of each battery cell is monitored in real time through software algorithms, and the cooling strategy is adjusted accordingly to ensure that the entire battery pack is in optimal working condition.

[0044] Reference Figures 10-13 As shown, the aluminum bar 1 has an expansion arch 12. When the battery cell 10 expands, the expansion arch 12 is used to absorb the displacement changes between the two battery cell 10 terminals and prevent the battery cell 10 terminals from being subjected to excessive force and causing leakage.

[0045] In some embodiments of this invention, the cooling section is formed as a groove 11 that arches in the thickness direction of the aluminum bar 1 towards the side opposite to the battery cell 10. The groove 11 extends along the width direction of the aluminum bar 1 and penetrates the aluminum bar 1. The groove 11 is adapted to the shape of the cooling pipe 2. It can be understood that by forming a groove 11 that arches in the thickness direction of the aluminum bar 1 towards the side opposite to the battery cell 10, the cooling pipe 2 can fit tightly against the aluminum bar 1, increasing the contact area between the cooling pipe 2 and the aluminum bar 1, improving heat transfer efficiency. The cooling pipe 2 being located within the groove 11 reduces additional space occupation, making the battery pack more compact and improving the reliability and stability of the battery pack.

[0046] In some embodiments of this invention, a groove 11 is formed at one end of the aluminum bar 1 along its length. The groove 11 includes a first groove portion 111 and a second groove portion 112, which are spaced apart in the thickness direction of the aluminum bar 1. It is understood that the first groove portion 111 and the second groove portion 112 are spaced apart to avoid the influence of expansion forces, thus ensuring the safety of the battery module 1000. This further improves the performance and reliability of the aluminum bar 1, ensuring effective temperature control during high-rate fast charging, and improving battery life and safety.

[0047] In some other embodiments of this utility model, for the square top-mounted battery cell 10, when the cells 10 are connected in parallel, the middle position of the aluminum bus 1 has the largest current carrying capacity, generates more heat, and has a higher temperature. Cooling is performed on the highest temperature point in the middle of the aluminum bus 1. The aluminum bus 1 has a first part 13 and a second part 14, with a groove 11 formed between the first part 13 and the second part 14. This reduces additional space occupation, making the battery pack more compact, and expands the applicability of the bus assembly 100, improving heat conduction efficiency. Figures 14-16 As shown, the cooling pipe 2 extends back and forth along the extension direction of the groove 11, thereby increasing the cooling path and improving the cooling effect.

[0048] In some embodiments of this utility model, a water inlet 21 is formed at one end of the cooling pipe 2, and a water outlet 22 is formed at the other end of the cooling pipe 2. Both the water inlet 21 and the water outlet 22 are connected to the cooling channel 23. Therefore, by setting a water inlet 21 at one end of the cooling pipe 2 and a water outlet 22 at the other end, the coolant is ensured to flow smoothly within the cooling channel 23, thereby effectively removing the heat generated by the aluminum bar 1 and the battery cell 10 terminals. This not only improves cooling efficiency but also enhances the reliability and maintenance convenience of the battery pack. It is understood that the coolant in the cooling pipe 2 enters from the water inlet 21, flows through the cooling channel 23 to the water outlet 22, and absorbs the heat generated by the aluminum bar 1 and the battery cell 10 terminals during this process, effectively reducing the battery temperature.

[0049] In some embodiments of this utility model, such as Figure 4 and Figure 7 As shown, the busbar assembly 100 further includes a first membrane layer 3 and a second membrane layer 4. The aluminum bar 1 and the cooling pipe 2 are both disposed between the first membrane layer 3 and the second membrane layer 4, and the aluminum bar 1 and the cooling pipe 2 are tightly pressed against the first membrane layer 3 and the second membrane layer 4. Therefore, by adding the first membrane layer 3 and the second membrane layer 4 between the aluminum bar 1 and the cooling pipe 2, not only is the cooling efficiency improved, but the system's sealing and insulation performance are also enhanced. The tight pressing of the aluminum bar 1 and the cooling pipe 2 between the first membrane layer 3 and the second membrane layer 4 ensures good heat conduction and electrical isolation.

[0050] In some embodiments of this utility model, in order to facilitate the absorption of gap changes when the cell 10 expands, a separation groove 31 is formed on the first film layer 3. The separation groove 31 is located between every two adjacent aluminum bars 1. In this way, electrical isolation is further enhanced, current interference between adjacent aluminum bars 1 is prevented, and the stability and safety of the battery pack are improved.

[0051] In some embodiments of this utility model, in order to ensure the reliability of the fit between the cooling pipe 2 and the aluminum bar 1, the bus assembly 100 further includes a support member, which is disposed between the second film layer 4 and the battery cell 10 to support the second film layer 4, prevent the second film layer 4 from delaminating after long-term operation, which would result in poor fit between the cooling pipe 2 and the groove 11, thereby ensuring the cooling effect.

[0052] In some embodiments, depending on the cooling requirements, the aluminum bar 1 can be cooled in a straight line or in a U-shape. When using a U-shape, grooves 11 need to be provided at both ends of the aluminum bar 1, and the sampling strip needs to be designed for matching and adjustment.

[0053] In some embodiments of this utility model, the cooling pipe 2 is a silicone pipe, which has the functions of heat conduction and insulation.

[0054] Preferably, the first film layer 3 and the second film layer 4 are both PET films.

[0055] The battery module 1000 according to a second aspect embodiment of the present invention includes the bus assembly 100 according to the first aspect embodiment of the present invention.

[0056] According to the embodiment of the present utility model, the battery module 1000 improves the thermal management performance of the battery module 1000 by setting the bus assembly 100 of the first aspect embodiment, effectively solves the heat problem generated during high-rate fast charging, and reduces the production cost of the battery module 1000.

[0057] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0058] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0059] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0061] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A bus assembly, characterized in that, include: An aluminum bar, on which a cooling section is formed; A cooling pipe is inserted into the cooling section and located between the aluminum battery and the cell. A cooling channel is formed inside the cooling pipe, and the cooling channel is suitable for the flow of coolant.

2. The bus assembly according to claim 1, characterized in that, The cooling section is formed as a groove that arches in the thickness direction of the aluminum bar toward the side opposite to the battery cell. The groove extends along the width direction of the aluminum bar and penetrates the aluminum bar. The groove is adapted to the shape of the cooling tube.

3. The bus assembly according to claim 2, characterized in that, The groove is formed at one end of the aluminum bar along its length. The groove includes a first groove and a second groove, which are spaced apart in the thickness direction of the aluminum bar.

4. The bus assembly according to claim 2, characterized in that, The aluminum bar has a first portion and a second portion, and the groove is formed between the first portion and the second portion.

5. The bus assembly according to claim 3 or 4, characterized in that, One end of the cooling pipe has a water inlet, and the other end of the cooling pipe has a water outlet. Both the water inlet and the water outlet are connected to the cooling channel.

6. The bus assembly according to claim 5, characterized in that, Also includes: The first film layer and the second film layer, the aluminum bar and the cooling pipe are both disposed between the first film layer and the second film layer, and the aluminum bar and the cooling pipe are tightly pressed with the first film layer and the second film layer.

7. The bus assembly according to claim 6, characterized in that, A partition groove is formed on the first film layer, and the partition groove is located between each two adjacent aluminum bars.

8. The bus assembly according to claim 6, characterized in that, Also includes: A support member is disposed between the second film layer and the battery cell to support the second film layer.

9. The bus assembly according to any one of claims 6-8, characterized in that, The cooling pipe is a silicone tube.

10. A battery module, characterized in that, The bus assembly included in any one of claims 1-9.

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