Integrated busbar and battery pack with same

Abstract

The utility model provides an integrated busbar and a battery pack with the same, and the integrated busbar comprises a bearing structure which is used for being arranged on a plurality of battery cells; the confluence structure is arranged on the bearing structure and is connected with the electrodes of the plurality of battery cells; the collecting structure is arranged on the bearing structure, and the collecting structure is in a plate shape and is connected with the confluence structure; the temperature acquisition structure is arranged on the collection structure and is used for detecting the temperature of the confluence structure and transmitting a detection result to the collection structure; the sealing colloid is arranged between the temperature acquisition structure and the collection structure and is used for sealing a gap between the collection structure and the temperature acquisition structure; wherein at least part of the sealing colloid is made of a heat conduction material, and the projection of the temperature acquisition structure on the sealing colloid is located in the outer periphery of the sealing colloid. According to the utility model, the problem of low safety of the power battery in the prior art is effectively solved.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to an integrated busbar and a battery pack having therein. Background Technology

[0002] Currently, with the development of modern technology, electric vehicles have gradually become popular in the market. As the power source of electric vehicles, the performance and efficiency of the battery pack have a significant impact on the overall performance of the electric vehicle. Users' demands for battery packs, especially for the integrated busbars in the battery pack, are also constantly increasing.

[0003] In existing technologies, integrated busbars use separate temperature acquisition devices to collect battery temperature data in order to monitor battery temperature and ensure battery safety.

[0004] However, existing integrated busbars occupy a large space, making it difficult to place temperature acquisition devices within the limited space of the power battery. This results in the inability to install temperature acquisition devices on the power battery, making it impossible to monitor the temperature of the power battery, thereby reducing the safety performance of the power battery. Utility Model Content

[0005] The main objective of this invention is to provide an integrated busbar and a battery pack having therein, in order to solve the problem of low safety of power batteries in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, an integrated busbar is provided, comprising: a support structure for mounting on multiple battery cells; a busbar structure mounted on the support structure and connected to the electrodes of the multiple battery cells; a collection structure mounted on the support structure, the collection structure being plate-shaped and connected to the busbar structure; a temperature acquisition structure mounted on the collection structure for detecting the temperature of the busbar structure and transmitting the detection result to the collection structure; and a sealing colloid disposed between the temperature acquisition structure and the collection structure for sealing the gap between the collection structure and the temperature acquisition structure; wherein at least a portion of the sealing colloid is made of a thermally conductive material, and the projection of the temperature acquisition structure onto the sealing colloid is located within the outer periphery of the sealing colloid.

[0007] Furthermore, there is a minimum distance L between the outer periphery of the sealing colloid and the outer periphery of the temperature acquisition structure, and the value of the minimum distance L satisfies: 2mm≤L≤3mm.

[0008] Furthermore, the collection structure also includes: a main plate, which is mounted on the load-bearing structure; a connecting part, which is mounted on the main plate and connected to the busbar structure to collect the current and temperature information of the busbar structure; wherein, there are multiple temperature acquisition structures, each of which is mounted on a connecting part to collect the temperature of the busbar structure.

[0009] Furthermore, the supporting structure is plate-shaped, and the bus structure includes: two first busbars, which are respectively disposed at both ends of the supporting structure; and multiple second busbars, which are disposed between the two first busbars; each first busbar is used to connect to one battery cell, and each second busbar is used to connect to two adjacent battery cells; wherein, the relationship between the thickness T1 of the first busbar and the thickness T2 of the second busbar satisfies: T2≤T1.

[0010] Furthermore, the first busbar includes a first connecting segment and a second connecting segment that are interconnected. The first connecting segment is disposed on the load-bearing structure, and at least part of the second connecting segment is located on the outer side of the outer peripheral surface of the load-bearing structure. The relationship between the thickness T11 of the first connecting segment, the thickness T12 of the second connecting segment, and the thickness T2 of the second busbar satisfies the following: T11 < T12, T2 < T12, T11 = T2.

[0011] Furthermore, the thickness T11 of the first connecting section has a range of 1.3mm ≤ T11 ≤ 1.7mm; and / or the thickness T12 of the second connecting section has a range of 2.3mm ≤ T12 ≤ 2.7mm.

[0012] Furthermore, the supporting structure includes multiple connecting holes, and the collecting structure also includes multiple clearance holes. The multiple clearance holes are spaced apart along the length direction of the collecting structure, and the multiple clearance holes are arranged opposite to the multiple connecting holes in a one-to-one correspondence, so as to avoid the explosion-proof valve of the battery cell through the clearance holes and connecting holes.

[0013] Furthermore, the collecting structure is provided with a buffer section, which is surrounded by buffer holes opened on the collecting structure. The buffer holes include a first hole segment and a second hole segment that are interconnected. The first hole segment extends along the length direction of the collecting structure, one end of the second hole segment is connected to one end of the first hole segment, and the other end of the second hole segment extends to the side of the collecting structure. Multiple buffer sections are provided on the same side of the collecting structure. The multiple buffer sections are a first buffer group and a second buffer group distributed along the extension direction of the collecting structure. Both the first buffer group and the second buffer group include multiple buffer sections distributed along the extension direction of the collecting structure. The second hole segment of each buffer section in the first buffer group is connected to the end of the first hole segment of the buffer section that is closer to the second buffer group. The second hole segment of each buffer section in the second buffer group is connected to the end of the first hole segment of the buffer section that is closer to the first buffer group.

[0014] Furthermore, a first buffer group and a second buffer group are provided on opposite sides of the collecting structure; and / or, the collecting structure includes a first buffer section and a second buffer section arranged sequentially along its extension direction, with the first buffer group located in the first buffer section and the second buffer group located in the second buffer section.

[0015] Furthermore, the collecting structure includes a main plate and a buffer section that is a strip plate. One end of the buffer section is set on the main plate, and the other end of the buffer section is a free end. The buffer section has an initial state and a buffered state. When the buffer section is in the initial state, the extension direction of the buffer section is parallel to the extension direction of the main plate. When the buffer section is in the buffered state, the buffer section is folded relative to the main plate.

[0016] Furthermore, the integrated busbar also includes: multiple voltage acquisition structures, which are spaced apart along the length or width of the collection structure. One end of each voltage acquisition structure is connected to the busbar structure, and the other end is connected to the buffer section, so as to obtain the voltage of the busbar structure through the voltage acquisition structure and transmit the detection result to the collection structure.

[0017] Furthermore, the integrated busbar also includes: a reinforcing structure disposed at the end of the collecting structure; and a connector disposed on the side of the reinforcing structure away from the collecting structure to monitor the voltage and temperature of the battery cells.

[0018] Furthermore, the collection structure also includes a main plate, the bending portion is formed by bending the end of the main plate and is set at an angle to the main plate; there are multiple reinforcing structures, at least two reinforcing structures are respectively set on opposite sides of the bending portion, and at least one reinforcing structure is located between the bending portion and the connector.

[0019] According to another aspect of the present invention, a battery pack is provided, comprising a plurality of stacked battery cells and an integrated busbar, wherein the integrated busbar is any of the aforementioned integrated busbars.

[0020] The present invention utilizes a busbar support structure mounted on multiple battery cells. A busbar structure is mounted on the support structure and connected to the electrodes of the multiple battery cells. A collection structure, plate-shaped, is mounted on the support structure and connected to the busbar structure. A temperature acquisition structure is mounted on the collection structure and used to detect the temperature of the busbar structure, transmitting the detection result to the collection structure. A sealing compound is placed between the temperature acquisition structure and the collection structure to seal the gap between them. At least a portion of the sealing compound is made of a thermally conductive material, and the projection of the temperature acquisition structure onto the sealing compound is located within its outer periphery. This arrangement allows the integrated busbar to connect to multiple battery cells via the busbar structure, and enables the acquisition of battery cell temperatures through the temperature acquisition structure mounted on the collection structure. This improves the convenience and accuracy of temperature acquisition, achieves battery cell temperature detection, ensures the operational reliability and safety performance of the battery cells, and thus solves the problem of low safety in existing power batteries. Meanwhile, the aforementioned sealing colloid not only connects the temperature acquisition structure and the collection structure, ensuring the reliability of the temperature information collected by the temperature acquisition structure, but also eliminates the need for a separate temperature acquisition structure on the integrated busbar, reducing the space occupied by the temperature acquisition structure and improving the space utilization of the battery cell. On the other hand, it allows workers to connect the temperature acquisition structure and the collection structure simply by applying the sealing colloid, making the overall operation very simple and quick. This not only improves the work efficiency of the workers, but also enhances the overall aesthetic appearance of the battery pack. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0022] Figure 1 A schematic diagram of the overall structure of an embodiment of the integrated busbar according to the present invention is shown;

[0023] Figure 2 It shows Figure 1 A partial structural diagram;

[0024] Figure 3 It shows Figure 1 Enlarged diagram of point A in the diagram;

[0025] Figure 4 It shows Figure 1 Enlarged diagram of point B in the image;

[0026] Figure 5 It shows Figure 1 Enlarged diagram of point C in the image.

[0027] The above figures include the following reference numerals:

[0028] 10. Load-bearing structure; 11. Connecting holes;

[0029] 20. Busbar structure; 21. First busbar component; 211. First connecting section; 212. Second connecting section; 22. Second busbar component;

[0030] 30. Collection structure; 31. Buffer section; 32. Buffer hole; 321. First hole section; 322. Second hole section; 33. First buffer group; 34. Second buffer group;

[0031] 35. Main body plate; 36. Clearance hole; 37. Connecting part; 38. Bending part;

[0032] 40. Voltage acquisition structure;

[0033] 50. Temperature acquisition structure;

[0034] 60. Strengthen the structure;

[0035] 70. Connector. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0038] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0039] To address the issue of low safety in existing power batteries, this application provides an integrated busbar and a battery pack incorporating it.

[0040] like Figure 1 and Figure 2 As shown, the integrated busbar includes a support structure 10, a busbar structure 20, a collection structure 30, a temperature acquisition structure 50, and a sealing compound. The support structure 10 is mounted on multiple battery cells. The busbar structure 20 is mounted on the support structure 10 and connected to the electrodes of the multiple battery cells. The collection structure 30 is mounted on the support structure 10, is plate-shaped, and connected to the busbar structure 20. The temperature acquisition structure 50 is mounted on the collection structure 30 and is used to detect the temperature of the busbar structure 20 and transmit the detection result to the collection structure 30. The sealing compound is disposed between the temperature acquisition structure 50 and the collection structure 30 to seal the gap between them. At least a portion of the sealing compound is made of a thermally conductive material, and the projection of the temperature acquisition structure 50 onto the sealing compound is located within the outer periphery of the sealing compound.

[0041] Using the technical solution of this embodiment, the integrated busbar support structure 10 is used to mount multiple battery cells. A busbar structure 20 is mounted on the support structure 10 and connected to the electrodes of the multiple battery cells. A collecting structure 30 is mounted on the support structure 10, and the collecting structure 30 is plate-shaped and connected to the busbar structure 20. A temperature sensing structure 50 is mounted on the collecting structure 30 and is used to detect the temperature of the busbar structure 20 and transmit the detection result to the collecting structure 30. A sealing compound is disposed between the temperature sensing structure 50 and the collecting structure 30 to seal the gap between them. At least a portion of the sealing compound is made of a thermally conductive material, and the projection of the temperature sensing structure 50 onto the sealing compound is located within the outer periphery of the sealing compound. In this way, the above-mentioned configuration allows the integrated busbar to connect to multiple battery cells via the busbar structure 20, and enables the collection of battery cell temperatures through the temperature acquisition structure 50 located on the collection structure 30. This improves the convenience and accuracy of temperature acquisition by the temperature acquisition structure 50, realizes the detection of battery cell temperatures, ensures the operational reliability and safety performance of the battery cells, and thus solves the problem of low safety in existing power batteries. Simultaneously, the above-mentioned configuration of the sealing colloid not only achieves the connection between the temperature acquisition structure 50 and the collection structure 30, ensuring the reliability of the temperature information collected by the temperature acquisition structure 50, but also eliminates the need for a separate temperature acquisition structure 50 on the integrated busbar, reducing the space occupied by the temperature acquisition structure 50 and improving the space utilization of the battery cells. Furthermore, it allows workers to connect the temperature acquisition structure 50 and the collection structure 30 simply by applying the sealing colloid, making the overall operation very simple and quick. This not only improves the work efficiency of the workers but also enhances the overall aesthetic appearance of the battery pack.

[0042] In this embodiment, the supporting structure 10 is made of polycarbonate. This arrangement serves two purposes: firstly, it enables the supporting structure 10 to support the collecting structure 30 and the busbar structure 20; secondly, it isolates the heat dissipated by the battery cell, ensuring the operational reliability of the collecting structure 30 and the busbar structure 20. Furthermore, in the event of thermal runaway in the battery cell, this arrangement prevents the spread of heat during thermal runaway, thereby ensuring the safety of the integrated busbar and its operational stability.

[0043] Specifically, the supporting structure 10 is a PC film, which is bonded to the battery cell with adhesive.

[0044] In this embodiment, the collecting structure 30 is a flexible circuit board.

[0045] Specifically, the collection structure 30 is manufactured using a physical process of cutting circuit boards with a die.

[0046] Specifically, the flexible circuit board has an adhesive backing on the side closest to the support structure 10, and is connected to the support structure 10 by adhesive bonding.

[0047] In this embodiment, the busbar structure 20 is an aluminum busbar made of 1060 material.

[0048] In this embodiment, the temperature acquisition structure 50 is a patch temperature sensor.

[0049] In this embodiment, the sealant is a structural adhesive, which is made of a thermally conductive material.

[0050] Specifically, no air bubbles should remain in the structural adhesive to improve the accuracy of temperature acquisition by the temperature acquisition structure 50.

[0051] Specifically, the outer periphery of the sealing adhesive and the outer periphery of the temperature sensing structure 50 have a minimum distance L, the value of which satisfies: 2mm ≤ L ≤ 3mm. This arrangement ensures the reliability of the connection between the temperature sensing structure 50 and the collection structure 30, improving the reliability of temperature sensing by the structure 50. Simultaneously, this arrangement allows for more flexible and diverse application of the sealing adhesive by the operator, reducing the difficulty of operation and improving work efficiency.

[0052] like Figures 1 to 5 As shown, the collecting structure 30 also includes a main plate 35 and a connecting part 37. The main plate 35 is mounted on the supporting structure 10. The connecting part 37 is mounted on the main plate 35 and is connected to the busbar structure 20 to collect current and temperature information from the busbar structure 20. At least two temperature acquisition structures 50 are provided, each mounted on a connecting part 37, to collect the temperature of the busbar structure 20. This arrangement allows the temperature acquisition structures 50 to be connected to the busbar structure 20 and the collecting structure 30 via the connecting parts 37, improving the convenience and accuracy of temperature acquisition, reducing the space occupied by the temperature acquisition structures 50, and further improving the space utilization of the battery cell. Simultaneously, this arrangement allows for greater flexibility and variety in the number of temperature acquisition structures 50, improving installation flexibility for workers and enhancing the reliability of temperature acquisition.

[0053] In this embodiment, three temperature acquisition structures 50 are configured.

[0054] It should be noted that the number of temperature acquisition structures 50 is not limited to this and can be adjusted according to working conditions and usage requirements. Optionally, there may be two, four, five, six, seven or more temperature acquisition structures 50.

[0055] like Figures 1 to 4As shown, the supporting structure 10 is plate-shaped, and the busbar structure 20 includes two first busbars 21 and multiple second busbars 22. The two first busbars 21 are respectively disposed at both ends of the supporting structure 10. The multiple second busbars 22 are disposed between the two first busbars 21. Each first busbar 21 is used to connect to one battery cell, and each second busbar 22 is used to connect to two adjacent battery cells. The thickness T1 of the first busbar 21 and the thickness T2 of the second busbar 22 satisfy the relationship: T2 ≤ T1. This arrangement, on the one hand, achieves connection between multiple battery cells, ensuring the operational reliability of the battery cells, and thus ensuring the reliability of the integrated busbar; on the other hand, it improves the buffering performance of the busbar structure 20 to avoid damage to the busbar structure 20 when the battery cells expand, thereby improving the reliability of the integrated busbar. Simultaneously, this arrangement ensures the current-carrying area of ​​the busbar structure 20, improves the heat dissipation performance of the battery cells, reduces the temperature of the battery cells, and further improves the operational stability of the battery cells.

[0056] In this embodiment, the first busbar 21 is an output aluminum busbar, and the second busbar 22 is a series aluminum busbar.

[0057] In this embodiment, the supporting structure 10, the first busbar 21 and the second busbar 22 are each provided with a plurality of through holes. The electrodes of the battery cell corresponding to the first busbar 21 pass through the through holes and are welded to the first busbar 21. The electrodes of the two battery cells corresponding to the second busbar 22 pass through the through holes and are connected to the second busbar 22.

[0058] like Figure 3 and Figure 4 As shown, the first busbar 21 includes a first connecting section 211 and a second connecting section 212 that are interconnected. The first connecting section 211 is disposed on the supporting structure 10, and at least a portion of the second connecting section 212 is located on the outer side of the outer peripheral surface of the supporting structure 10. The thicknesses T11 of the first connecting section 211, T12 of the second connecting section 212, and T2 of the second busbar 22 satisfy the following relationship: T11 < T12, T2 < T12, T11 = T2. This arrangement ensures smooth installation of the first busbar 21 and the second busbar 22, reduces processing difficulty for workers, and improves work efficiency. Furthermore, it allows the second busbar 22 to improve the heat dissipation efficiency of the battery cell through the second connecting section 212, thereby enhancing the operational stability of the battery cell.

[0059] Specifically, the first busbar is manufactured by a thinning process after H24 heat treatment.

[0060] Specifically, the thickness T11 of the first connecting section 211 ranges from 1.3mm to 1.7mm; and / or the thickness T12 of the second connecting section 212 ranges from 2.3mm to 2.7mm. This arrangement makes the thicknesses of the first busbar 21 and the second busbar 22 more suitable, further improving the operational reliability of the battery cell while also ensuring the work efficiency of the staff.

[0061] Specifically, the thickness T11 of the first connecting segment 211 is: T11 = 1.5 mm.

[0062] Specifically, the thickness T12 of the second connecting section 212 is: T12 = 5.5 mm.

[0063] like Figure 1 and Figure 2 As shown, the supporting structure 10 includes multiple connecting holes 11, and the collecting structure 30 also includes multiple clearance holes 36. The clearance holes 36 are spaced apart along the length of the collecting structure 30, and are arranged in a one-to-one correspondence with the connecting holes 11 to avoid interference with the explosion-proof valve of the battery cell. This arrangement avoids interference between the integrated busbar and the battery cell's explosion-proof valve, ensuring the reliability of the explosion-proof valve's operation and thus improving the safety of the battery cell and the operational reliability of the integrated busbar. Simultaneously, this arrangement further enhances the buffering performance of the integrated busbar, further improving its safety.

[0064] like Figure 1 and Figure 2As shown, a buffer section 31 is provided on the collecting structure 30. The buffer section 31 is surrounded by buffer holes 32 formed on the collecting structure 30. The buffer holes 32 include a first hole segment 321 and a second hole segment 322 that are interconnected. The first hole segment 321 extends along the length direction of the collecting structure 30. One end of the second hole segment 322 is connected to one end of the first hole segment 321, and the other end of the second hole segment 322 extends to the side of the collecting structure 30. Multiple buffer sections 31 are provided on the same side of the collecting structure 30. The multiple buffer sections 31 are divided into a first buffer group 33 and a second buffer group 34 distributed along the extension direction of the collecting structure 30. Both the first buffer group 33 and the second buffer group 34 include multiple buffer sections 31 distributed along the extension direction of the collecting structure 30. The second hole segment 322 of each buffer part 31 in the first buffer group 33 is connected to the end of the first hole segment 321 of the buffer part 31 near the second buffer group 34, and the second hole segment 322 of each buffer part 31 in the second buffer group 34 is connected to the end of the first hole segment 321 of the buffer part 31 near the first buffer group 33. In this way, when the battery cell expands, the arrangement of the buffer part 31 increases the range of motion of the collecting structure 30 in the length and width directions, thereby buffering the impact force of the battery cell on the collecting structure 30, improving the buffering performance of the collecting structure 30, and preventing damage to the collecting structure 30 due to the pulling of the battery cell during the expansion process. This ensures the operational stability of the collecting structure 30, extends its service life, and improves the integrated reliability of the integrated busbar, solving the problem of low reliability of integrated busbars in the prior art.

[0065] Specifically, when multiple cells are arranged side by side, the expansion mainly occurs from the middle cell to the two sides. The arrangement of the first buffer group 33 and the second buffer group 34 further increases the amount of movement of the collecting structure 30 along its length, further improves the buffering performance of the collecting structure 30, and further ensures the operational stability of the integrated busbar.

[0066] like Figure 1 and Figure 2 As shown, a first buffer group 33 and a second buffer group 34 are provided on both opposite sides of the collecting structure 30. And / or, the collecting structure 30 includes a first buffer section and a second buffer section arranged sequentially along its extending direction, with the first buffer group 33 located in the first buffer section and the second buffer group 34 located in the second buffer section. Thus, the above arrangement further improves the buffering performance of the collecting structure 30, enhances its operational stability, and consequently improves the reliability of the integrated busbar.

[0067] Specifically, along the length of the collecting structure 30, the collecting structure 30 is divided into left and right parts, with a first buffer section located in the left part of the collecting structure 30 and a second buffer section located in the right part of the collecting structure 30.

[0068] like Figure 1 and Figure 2 As shown, the collecting structure 30 includes a main plate 35 and a buffer section 31, which is a strip plate. One end of the buffer section 31 is disposed on the main plate 35, and the other end is a free end. The buffer section 31 has an initial state and a buffered state. In the initial state, the extension direction of the buffer section 31 is parallel to the extension direction of the main plate 35. In the buffered state, the buffer section 31 folds relative to the main plate 35. Thus, in the initial state, the buffer section 31 and the main plate 35 are on the same horizontal plane, reducing the space occupied by the integrated busbar and increasing the energy density of the battery cell. When the battery cell expands, the buffer section 31 is in the buffered state, folds relative to the main plate 35, and the free end of the buffer section 31 tilts upward, further increasing the mobility of the collecting structure 30 and further improving its buffering performance.

[0069] like Figures 1 to 5 As shown, the integrated busbar also includes multiple voltage acquisition structures 40. These voltage acquisition structures 40 are spaced apart along the length or width of the collection structure 30. One end of each voltage acquisition structure 40 is connected to the busbar structure 20, and the other end is connected to the buffer section 31. This allows the voltage of the busbar structure 20 to be acquired through the voltage acquisition structures 40, and the detection results are transmitted to the collection structure 30. In this way, the voltage acquisition structures 40 enable the acquisition of cell voltage information, ensuring the reliability of the integrated busbar. Furthermore, the arrangement of multiple voltage acquisition structures 40 improves the acquisition efficiency and accuracy, thereby enhancing cell safety. It also allows for greater flexibility in the number of voltage acquisition structures 40, improving installation flexibility for operators. Additionally, the placement of the voltage acquisition structures 40 on the buffer section 31 enhances their buffering capacity, further improving their acquisition reliability.

[0070] In this embodiment, the voltage acquisition structure 40 is a nickel sheet, with one end welded to the busbar structure 20 and the other end welded to the buffer section 31. This arrangement ensures the stability of the voltage acquisition structure 40 while reducing the space occupied by the integrated busbar.

[0071] like Figure 1 and Figure 3As shown, the integrated busbar also includes a reinforcing structure 60 and a connector 70. The reinforcing structure 60 is located at the end of the collecting structure 30. The connector 70 is located on the side of the reinforcing structure 60 away from the collecting structure 30 to monitor the voltage and temperature of the battery cells. Thus, the above arrangement, on the one hand, enables the integrated busbar to monitor the voltage and temperature of the battery cells, improving the automation level of the integrated busbar and the safety of the battery cells; on the other hand, it increases the strength of the collecting structure 30, improves the connection stability of the connector 70, and further enhances the reliability of the integrated busbar.

[0072] In this embodiment, the reinforcing structure 60 is a reinforcing plate.

[0073] like Figure 1 and Figure 3 As shown, the collecting structure 30 also includes a main body plate 35, and a bent portion 38 is formed by bending the end of the main body plate 35, forming an angle with the main body plate 35. Multiple reinforcing structures 60 are present, with at least two reinforcing structures 60 respectively disposed on opposite sides of the bent portion 38, and at least one reinforcing structure 60 located between the bent portion 38 and the connector 70. This arrangement, on the one hand, improves the space utilization of the integrated busbar, further reducing the space occupied by the integrated busbar; on the other hand, it protects other components, preventing damage to them and further improving the safety of the integrated busbar.

[0074] In this embodiment, the included angle between the bent portion 38 and the main body plate 35 is set at 90°.

[0075] It should be noted that the included angle between the bent portion 38 and the main body plate 35 is not limited to this value and can be adjusted according to working conditions and usage requirements. Optionally, the included angle between the bent portion 38 and the main body plate 35 is 45°, 60°, 75°, 105°, 120°, or 135°.

[0076] According to another aspect of the present invention, a battery pack is provided, comprising a plurality of stacked battery cells and an integrated busbar, wherein the integrated busbar is the aforementioned integrated busbar.

[0077] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0078] The integrated busbar's support structure is used to mount multiple battery cells. A busbar structure is mounted on the support structure and connected to the electrodes of the multiple battery cells. A collection structure, plate-shaped, is mounted on the support structure and connected to the busbar structure. A temperature acquisition structure is mounted on the collection structure to detect the temperature of the busbar structure and transmit the detection result to the collection structure. A sealing compound is placed between the temperature acquisition structure and the collection structure to seal the gap between them. At least a portion of the sealing compound is made of a thermally conductive material, and the projection of the temperature acquisition structure onto the sealing compound is located within its outer periphery. This arrangement allows the integrated busbar to connect to multiple battery cells via the busbar structure, and enables the acquisition of battery cell temperatures through the temperature acquisition structure mounted on the collection structure. This improves the convenience and accuracy of temperature acquisition, achieves battery cell temperature detection, ensures the operational reliability and safety performance of the battery cells, and thus solves the problem of low safety in existing power batteries. Meanwhile, the aforementioned sealing colloid not only connects the temperature acquisition structure and the collection structure, ensuring the reliability of the temperature information collected by the temperature acquisition structure, but also eliminates the need for a separate temperature acquisition structure on the integrated busbar, reducing the space occupied by the temperature acquisition structure and improving the space utilization of the battery cell. On the other hand, it allows workers to connect the temperature acquisition structure and the collection structure simply by applying the sealing colloid, making the overall operation very simple and quick. This not only improves the work efficiency of the workers, but also enhances the overall aesthetic appearance of the battery pack.

[0079] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0080] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0081] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0082] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An integrated busbar, characterized by, The application relates to a battery pack, comprising: a bearing structure (10) arranged on a plurality of battery cells; a current collecting structure (20) arranged on the bearing structure (10) and connected with electrodes of the plurality of battery cells; a collecting structure (30) arranged on the bearing structure (10), the collecting structure (30) being plate-shaped and connected with the current collecting structure (20); a temperature collecting structure (50) arranged on the collecting structure (30) and used for detecting the temperature of the current collecting structure (20) and transmitting the detection result to the collecting structure (30); a sealing adhesive arranged between the temperature collecting structure (50) and the collecting structure (30) and used for sealing the gap between the collecting structure (30) and the temperature collecting structure (50); at least part of the sealing adhesive is made of a heat-conducting material, and the projection of the temperature collecting structure (50) on the sealing adhesive is located within the outer periphery of the sealing adhesive.

2. The integrated busbar of claim 1, wherein, The shortest distance L between the outer periphery of the sealing adhesive and the outer periphery of the temperature collecting structure (50) satisfies 2mm<=L<=3mm.

3. The integrated busbar of claim 1, wherein, The collecting structure (30) further comprises: a main body plate (35) arranged on the bearing structure (10); a connecting part (37) arranged on the main body plate (35) and connected with the current collecting structure (20) to collect the current and temperature information of the current collecting structure (20); the temperature collecting structure (50) is in plurality, each temperature collecting structure (50) is arranged on one connecting part (37) to collect the temperature of the current collecting structure (20).

4. The integrated busbar of claim 1, wherein, The bearing structure (10) is plate-shaped, and the current collecting structure (20) comprises: two first current collecting parts (21) arranged at two ends of the bearing structure (10) respectively; a plurality of second current collecting parts (22) arranged between the two first current collecting parts (21); each first current collecting part (21) is used for connecting with one battery cell, and each second current collecting part (22) is used for connecting with two adjacent battery cells; the relationship between the thickness T1 of the first current collecting part (21) and the thickness T2 of the second current collecting part (22) satisfies T2<=T1.

5. The integrated busbar of claim 4, wherein, The first current collecting part (21) comprises a first connecting section (211) and a second connecting section (212) connected with each other, the first connecting section (211) is arranged on the bearing structure (10), and at least part of the second connecting section (212) is located outside the outer periphery of the bearing structure (10); the relationship between the thickness T11 of the first connecting section (211), the thickness T12 of the second connecting section (212) and the thickness T2 of the second current collecting part (22) satisfies T11 6. The integrated busbar of claim 5, wherein, The first connecting section (211) has a thickness T11 in a range of 1.3mm≤T11≤1.7mm; and / or the second connecting section (212) has a thickness T12 in a range of 2.3mm≤T12≤2.7mm.

7. The integrated busbar of any one of claims 1 to 3, wherein, The bearing structure (10) comprises a plurality of connecting holes (11), The collecting structure (30) further comprises a plurality of avoiding holes (36), the plurality of avoiding holes (36) are arranged at intervals along the length direction of the collecting structure (30), and the plurality of avoiding holes (36) are arranged opposite to the plurality of connecting holes (11) one by one to avoid the explosion-proof valve of the battery cell through the avoiding holes (36) and the connecting holes (11).

8. The integrated busbar of claim 1, wherein, The collecting structure (30) is provided with a buffer part (31), the buffer part (31) is surrounded by a buffer hole (32) opened on the collecting structure (30), The buffer hole (32) comprises a first hole section (321) and a second hole section (322) in communication with each other, the first hole section (321) extends along the length direction of the collecting structure (30), one end of the second hole section (322) is connected with one end of the first hole section (321), and the other end of the second hole section (322) extends to the side edge of the collecting structure (30); The same side edge of the collecting structure (30) is provided with a plurality of buffer parts (31), the plurality of buffer parts (31) are divided into a first buffer group (33) and a second buffer group (34) distributed along the extension direction of the collecting structure (30), and the first buffer group (33) and the second buffer group (34) each comprise a plurality of buffer parts (31) distributed along the extension direction of the collecting structure (30); The second hole section (322) of each buffer part (31) in the first buffer group (33) is connected with one end of the first hole section (321) of the buffer part (31) close to the second buffer group (34), and the second hole section (322) of each buffer part (31) in the second buffer group (34) is connected with one end of the first hole section (321) of the buffer part (31) close to the first buffer group (33).

9. The integrated busbar of claim 8, wherein The first buffer group (33) and the second buffer group (34) are arranged at the opposite two side edges of the collecting structure (30); and / or The collecting structure (30) comprises a first buffer section and a second buffer section arranged in sequence along the extension direction thereof, the first buffer group (33) is arranged in the first buffer section, and the second buffer group (34) is arranged in the second buffer section.

10. The integrated busbar of claim 9, wherein, The collecting structure (30) comprises a main plate (35), The buffer part (31) is a strip-shaped plate, one end of the buffer part (31) is arranged on the main plate (35), and the other end of the buffer part (31) is a free end; The buffer portion (31) has an initial state and a buffering state. When the buffer portion (31) is in the initial state, the extension direction of the buffer portion (31) is parallel to the extension direction of the main body plate (35). When the buffer portion (31) is in the buffering state, the buffer portion (31) is folded relative to the main body plate (35).

11. The integrated busbar of any one of claims 8 to 10, wherein, The integrated busbar further comprises: A plurality of voltage collection structures (40) are arranged along the length direction or the width direction of the collection structure (30). One end of the voltage collection structure (40) is connected to the busbar structure (20), and the other end of the voltage collection structure (40) is connected to the buffer portion (31), so as to obtain the voltage of the busbar structure (20) through the voltage collection structure (40), and transmit the detection result to the collection structure (30).

12. The integrated busbar of any one of claims 1 to 3, wherein, The integrated busbar further comprises: A reinforcing structure (60) is arranged at the end of the collection structure (30); A connector (70) is arranged on the side of the reinforcing structure (60) away from the collection structure (30), so as to monitor the voltage and temperature of the battery cell.

13. The integrated busbar of claim 12, wherein, The collection structure (30) further comprises a main body plate (35), A bending portion (38) is bent from the end of the main body plate (35) and is arranged at an angle with the main body plate (35); The reinforcing structure (60) is a plurality of reinforcing structures, at least two reinforcing structures (60) are arranged on opposite sides of the bending portion (38), and at least one reinforcing structure (60) is located between the bending portion (38) and the connector (70).

14. A battery pack, characterized by The integrated busbar further comprises: A plurality of stacked battery cells and an integrated busbar, wherein the integrated busbar is any one of claims 1-13.

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