Busbar assembly and battery module

Abstract

The utility model provides a busbar assembly and a battery module, and relates to the technical field of batteries. The busbar assembly comprises a first insulating layer, a second insulating layer, a busbar and a flexible circuit board, the first insulating layer and the second insulating layer are oppositely arranged, the busbar is arranged between the first insulating layer and the second insulating layer, and the flexible circuit board is arranged between the busbar and the first insulating layer. Wherein the outer edge of the flexible circuit board is of a closed structure, the flexible circuit board covers the busbar, and a plurality of hollow parts are formed in the flexible circuit board and used for exposing the positive electrode part and the negative electrode part of the busbar. According to the battery module, the flexible circuit board is arranged to be a board body, when the busbar, the flexible circuit board, the first insulating layer and the second insulating layer are subjected to laminated assembly, assembly and fixation of multiple layers of accessories can be achieved only through one-time alignment and one-time unified welding, and the production efficiency of the battery module can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a busbar assembly and a battery module. BACKGROUND

[0002] The battery module includes a plurality of single batteries, the plurality of single batteries are electrically connected through busbars and collect voltage signals and temperature signals in the battery module by using flexible circuit boards. In the related art, the flexible circuit board used by the plurality of single batteries includes a plurality of flexible sub-boards, and each flexible sub-board corresponds to at least one busbar. The battery module contains a large number of single batteries, thereby causing a large number of flexible sub-boards to be set, and each time the flexible sub-boards are set, the alignment of the flexible sub-boards, the single batteries and the busbars needs to be performed once, and the setting of each flexible sub-board needs to be performed once. The separate wiring is not conducive to improving the production efficiency. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the present application provide a busbar assembly and a battery module to improve the technical problem that the assembly process of the battery module is relatively complex and troublesome.

[0004] In a first aspect, embodiments of the present application provide a busbar assembly, comprising:

[0005] a first insulating layer and a second insulating layer arranged oppositely;

[0006] a busbar arranged between the first insulating layer and the second insulating layer;

[0007] a flexible circuit board arranged between the busbar and the first insulating layer;

[0008] wherein an outer edge of the flexible circuit board is a closed structure, the flexible circuit board covers the busbar, a plurality of hollow parts are formed on the flexible circuit board, and the positive electrode part and the negative electrode part of the busbar are exposed through the hollow parts.

[0009] In some embodiments of the present application, the flexible circuit board includes a circuit board body and a connector, the circuit board body is electrically connected to the connector, and a temperature sensor and a voltage sensor are arranged on the circuit board body.

[0010] In some embodiments of the present application, the flexible circuit board further includes a support plate, the support plate is arranged at one end of the circuit board body, and the connector is arranged on the support plate.

[0011] In some embodiments of the present application, a plurality of the hollow parts are arranged into a hollow part group along the length direction of the flexible circuit board, and a plurality of the hollow part groups are arranged at intervals along the width direction of the flexible circuit board.

[0012] The busbar comprises a plurality of busbar groups, the plurality of busbar groups are arranged at intervals along the width direction, and at least part of one busbar group is arranged in position with one hollow group.

[0013] In some embodiments of the present application, the hollow group comprises a plurality of first through holes and a plurality of second through holes, the plurality of first through holes are arranged along the length direction, and the plurality of first through holes are communicated along the length direction, and the plurality of second through holes are arranged at intervals along the length direction.

[0014] In some embodiments of the present application, the plurality of first through holes and the plurality of second through holes are arranged at intervals along the width direction.

[0015] In some embodiments of the present application, a plurality of soldering points are formed on the flexible circuit board, and each soldering point is located between two adjacent first through holes along the length direction.

[0016] In some embodiments of the present application, the busbar group comprises a plurality of busbars, the plurality of busbars are arranged at intervals along the length direction, each busbar is arranged in position with at least two adjacent first through holes and two adjacent second through holes, and the two first through holes and the two second through holes are arranged at intervals along the width direction.

[0017] In some embodiments of the present application, the busbar comprises a first sub-bar, a second sub-bar and an inclined section, the first sub-bar and the second sub-bar are connected through the inclined section, and the first sub-bar and the second sub-bar are arranged at intervals along the width direction.

[0018] In some embodiments of the present application, the first sub-bar comprises a positive electrode connecting portion, a negative electrode connecting portion and a soldering bump, the positive electrode connecting portion is connected with the negative electrode connecting portion, and the soldering bump is arranged on the positive electrode connecting portion and protrudes towards the second insulating layer.

[0019] In some embodiments of the present application, the positive electrode connecting portion is provided with a positive electrode positioning notch, the negative electrode connecting portion is provided with a negative electrode positioning notch, and the positive electrode positioning notch is aligned with the negative electrode positioning notch along the length direction.

[0020] In some embodiments of the present application, the busbar further comprises a positive busbar plate, a negative busbar plate, a positive plate, a negative plate, and a plurality of intermediate busbar plates, the positive plate and the negative plate are arranged opposite to each other, the positive plate is connected with the positive busbar plate, the negative plate is connected with the negative busbar plate, one end of the positive busbar plate away from the positive plate is connected with the positive connection part of the first sub-piece and the positive connection part of the second sub-piece of one of the busbar pieces, and one end of the negative busbar plate away from the negative plate is connected with the negative connection part of the first sub-piece and the negative connection part of the second sub-piece of one of the busbar pieces, the plurality of intermediate busbar plates are arranged along the width direction and the length direction, and the plurality of intermediate busbar plates are located on the current path conducted by the positive busbar plate and the negative busbar plate, and the structure formed by the positive busbar plate, the plurality of intermediate busbar plates, and the negative busbar plate is in a serpentine shape.

[0021] In a second aspect, the embodiments of the present application provide a battery module, comprising a plurality of single batteries and the busbar assembly as described in the first aspect, the plurality of single batteries are arranged and distributed along the length direction and the width direction, and along the width direction, adjacent single batteries are arranged in a staggered manner, and the plurality of single batteries are connected with the busbar.

[0022] The embodiments of the present application have the following beneficial effects:

[0023] The present application provides a busbar assembly and a battery module, by setting the outer edge of the flexible circuit board as a closed structure and covering the busbar, the flexible circuit board can be reasonably deduced as an integral plate structure covering the busbar, and a plurality of hollow parts for exposing the positive part and the negative part of the busbar are formed on the flexible circuit board, so that the flexible circuit board can be integrally formed without interfering with the positive and negative exposure of the busbar, thereby realizing the assembly and fixation of multi-layer accessories only by one-time alignment and one-time unified welding when the busbar, the flexible circuit board, the first insulating layer and the second insulating layer are laminated and assembled, which is beneficial to improve the efficiency of the assembly and formation of the busbar assembly, and in turn improve the production efficiency of the battery module. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is an explosion schematic view of a battery module provided by the embodiments of the present application;

[0025] Figure 2 is a structural schematic view of a busbar assembly provided by the embodiments of the present application;

[0026] Figure 3 is Figure 2 an explosion schematic view of

[0027] Figure 4is a structural schematic view of a flexible circuit board in a busbar assembly provided by an embodiment of the present application;

[0028] Figure 5 is a structural schematic view of a busbar in a busbar assembly provided by an embodiment of the present application;

[0029] Figure 6 is a structural schematic view of a busbar sheet in a busbar assembly provided by an embodiment of the present application.

[0030] Legend of reference signs:

[0031] 1, single battery; 2, busbar assembly; 21, first insulating layer; 22, second insulating layer; 23, busbar; 231, busbar sheet; 2311, first sub-sheet; 23111, positive electrode connecting part; 23112, negative electrode connecting part; 23113, solder bump; 23114, positive electrode positioning notch; 23115, negative electrode positioning notch; 2312, second sub-sheet; 2313, inclined section; 232, positive electrode busbar plate; 233, negative electrode busbar plate; 234, positive electrode plate; 235, negative electrode plate; 236, intermediate busbar plate; 24, flexible circuit board; 241, circuit board body; 2411, hollow part group; 24111, first through hole; 24112, second through hole; 242, support plate; 243, solder joint; 244, connector;

[0032] X, length direction; Y, width direction. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0034] Please refer to Figures 1 to 6The embodiments of the present application provide a battery module, which comprises a plurality of single batteries 1 and a busbar assembly 2. The plurality of single batteries 1 are arranged along the length direction X and the width direction Y of the busbar assembly 2. Specifically, the plurality of single batteries 1 are arranged along the length direction X of the busbar assembly 2 in sequence to form a column of single battery columns, and the plurality of single battery columns are arranged along the width direction Y of the busbar assembly 2 in sequence. In addition, since the single battery 1 is a cylindrical battery, the adjacent single batteries 1 are arranged in staggered mode along the width direction Y, so that the adjacent single batteries 1 along the width direction Y can compensate for the gap caused by the cylindrical shape of the battery, thereby making the arrangement of the plurality of single batteries 1 more compact, saving the internal space of the battery module, and improving the integration of the battery.

[0035] The plurality of single batteries 1 are connected with the busbar assembly 2, and the busbar assembly 2 is used to electrically connect the plurality of single batteries 1 and to monitor the working condition of the single battery 1 in real time. Compared with the electrical connection of each single battery 1 by using a separate connector, the circuit is simpler.

[0036] In some embodiments, referring to Figures 2 to 6 , the busbar assembly 2 comprises:

[0037] a first insulating layer 21 and a second insulating layer 22 arranged oppositely;

[0038] a busbar 23 arranged between the first insulating layer 21 and the second insulating layer 22;

[0039] a flexible circuit board 24 arranged between the busbar 23 and the first insulating layer 21;

[0040] wherein the outer edge of the flexible circuit board 24 is a closed structure, and the flexible circuit board 24 covers the busbar 23, and a plurality of hollow parts are formed on the flexible circuit board 24 for exposing the positive and negative parts of the busbar 23.

[0041] In detail, the busbar assembly 2 comprises a first insulating layer 21 and a second insulating layer 22 arranged oppositely, and a busbar 23 located between the two insulating layers. The busbar 23 is a core component for connecting multiple single batteries 1 in the battery module, through which the collection and distribution of electric energy can be achieved. The first insulating layer 21 and the second insulating layer 22 are made of materials with high insulating properties to ensure electrical isolation and prevent electrical short circuit during the operation of the battery module. The two layers of insulating material are arranged oppositely and cover the upper and lower surfaces of the busbar 23, forming an overall busbar 23 structure. The busbar 23 is located between the two layers of insulating material and is responsible for connecting the positive and negative electrodes of each single battery 1, forming the electrical connection of the battery module. The material of the busbar 23 can be copper, aluminum or other metal materials with good electrical conductivity, and its surface can be tinned or subjected to other corrosion prevention treatment as needed to improve its durability and electrical conductivity. In this embodiment, the material of the busbar 23 is nickel, which facilitates the welding between the busbar 23 and the flexible circuit board 24. Specifically, nickel can be directly welded together with the flexible circuit board 24 through soldering, and under the condition of meeting the overcurrent, the welding bonding force is greater. A flexible circuit board 24 is arranged between the first insulating layer 21 and the busbar 23. The flexible circuit board 24 is a plate structure and covers one surface of the busbar 23. Unlike the multiple flexible sub-boards in the prior art, the flexible circuit board 24 in this application covers the busbar 23 at one time, greatly reducing the complexity of installation and the number of alignment operations. To achieve electrical connection of the positive and negative electrodes of the battery, the flexible circuit board 24 is provided with a plurality of hollow parts. These hollow parts are used to expose the positive and negative parts of the busbar 23, thereby achieving electrical connection between the battery and the busbar 23, making the electrical connection of the battery module more convenient, and avoiding installation errors caused by multiple alignment operations.

[0042] In this embodiment, the number and shape of the hollow parts are matched with the structure of the busbar 23 to ensure accurate exposure and good contact of the positive and negative electrodes. Specifically, the hollow parts can be rectangular, circular or other suitable shapes, and are arranged uniformly along the length direction X of the flexible circuit board 24, thereby achieving multi-point simultaneous connection.

[0043] The technical solution provided by the present application sets the flexible circuit board 24 as a plate body and provides a plurality of hollow parts on the flexible circuit board 24 for exposing the positive and negative parts of the busbar 23, so that the flexible circuit board 24 can be integrally formed in a plate body shape without interfering with the exposure of the positive and negative electrodes of the busbar 23. When the busbar 23, the flexible circuit board 24, the first insulating layer 21 and the second insulating layer 22 are stacked and assembled, only one alignment and one unified welding are required to achieve the assembly and fixation of the multi-layer accessories, which is conducive to improving the efficiency of the assembly and formation of the busbar assembly 2, and thereby improving the production efficiency of the battery module.

[0044] In some embodiments, referring to Figure 4 The flexible circuit board 24 includes a circuit board body 241 and a connector 244. The circuit board body 241 is provided with temperature sensors and voltage sensors, and is electrically connected to the connector 244 to realize real-time acquisition and transmission of key parameter information of the battery module, such as voltage and temperature. The circuit board body 241 is covered between the positive and negative parts of the busbar 23, and exposes the positive and negative electrodes in the busbar 23 through a plurality of hollow parts formed therein, facilitating subsequent electrical connection of the busbar 23. The circuit board body 241 is made of a material with good flexibility and conductivity, such as polyimide or other suitable flexible substrate, so as to ensure that it can be flexibly arranged in the complex space of the battery module.

[0045] In order to monitor the working state of the battery module, temperature sensors (not shown in the figure) and voltage sensors (not shown in the figure) are integrated on the circuit board body 241. These sensors are respectively located at different positions of the circuit board body 241 for acquiring temperature signals and voltage signals of the battery module. In actual application, the temperature sensors can be arranged at the part of the battery module close to the current channel to accurately monitor the heat generated by the busbar 23 and the single battery 1 during operation. The voltage sensors are arranged at the key nodes of the battery module for real-time detection of voltage changes of each single battery 1.

[0046] The connector 244 is provided at one end of the circuit board body 241 and is electrically connected to the temperature sensors and voltage sensors on the circuit board body 241. Through the connector 244, the acquired voltage and temperature signals can be transmitted to an external control system or a battery management system (BMS). The connector 244 can adopt a standard multi-pin design to ensure stable electrical connection and support high-speed data transmission. The selection of the material of the connector 244 is also very important. The shell thereof should have high durability and anti-interference performance to ensure that the transmission of sensor data is not affected by electromagnetic interference or environment.

[0047] During installation, the circuit board body 241 is designed integrally, which not only simplifies the installation steps of the flexible circuit board 24, but also avoids the problem of unstable electrical connection caused by inaccurate alignment of multiple sub-boards. At the same time, the integrated temperature and voltage sensor design enables the battery module to realize real-time monitoring of core parameters during operation, effectively improving the safety and reliability of the battery system.

[0048] Further, the flexible circuit board 24 further comprises a support plate 242, which is arranged at one end of the circuit board body 241, and the connector 244 is arranged on the support plate 242. The support plate 242 is made of hard material, such as glass fiber reinforced material or metal sheet, which is different from the base material of the circuit board body 241, and can effectively prevent the bending deformation of this area. The support plate 242 is arranged at the connecting end of the circuit board body 241, i.e. the position where the flexible circuit board 24 is electrically connected with external equipment. Through this design, the support plate 242 can effectively improve the mechanical stability of the connecting end of the flexible circuit board 24, and avoid damage to the flexible circuit board 24 caused by frequent plugging or other external forces. By arranging the connector 244 on the support plate 242, not only can the stable installation of the connector 244 be ensured, but also the other parts of the flexible circuit board 24 can be prevented from being damaged due to frequent connection operations. In addition, the presence of the support plate 242 enables the connector 244 to be firmly fixed on the flexible circuit board 24, ensuring that it maintains stable electrical connection during long-term use.

[0049] In some embodiments, a plurality of hollow parts are arranged along the length direction X of the flexible circuit board 24 into a hollow part group 2411, and a plurality of hollow part groups 2411 are arranged along the width direction Y of the flexible circuit board 24. The bus bar 23 comprises a plurality of bus bar groups, and the plurality of bus bar groups are arranged along the width direction Y, and at least part of one bus bar group is arranged in position with one hollow part group 2411. By arranging at least part of one bus bar group in position with one hollow part group 2411, it can be ensured that the positive and negative electrode parts of each monomer battery 1 in the battery module can be accurately connected to the corresponding part of the bus bar 23. Specifically, the hollow part groups 2411 are arranged at intervals consistent with the bus bar groups, and are all installed in position in groups, which is conducive to reducing the adjustment time during installation and improving the stability of electrical connection.

[0050] In some embodiments, the hollowed part group 2411 includes a plurality of first through holes 24111 and a plurality of second through holes 24112. The plurality of first through holes 24111 are arranged in communication along the length direction X, and the plurality of second through holes 24112 are arranged in intervals along the length direction X. The first through holes 24111 are a group of through holes arranged along the length direction X of the flexible circuit board 24. The arrangement of the first through holes 24111 is continuous and in communication, that is, each first through hole 24111 is connected to each other, forming a channel along the length direction X. Through such continuous arrangement, the first through holes 24111 can expose a longer area of the part of the bus bar group, ensuring that the contact area of the electrical connection is large enough. In contrast to the first through holes 24111, the second through holes 24112 are arranged in intervals along the length direction X of the flexible circuit board 24. The position of the second through holes 24112 is adjacent to the first through holes 24111, but not arranged in communication, but in the form of intervals distributed on the flexible circuit board 24. The second through holes 24112 are generally circular, rectangular or other irregular shapes, which are not limited, as long as they can expose the corresponding part of the bus bar group.

[0051] In addition, the interval arrangement of the first through holes 24111 and the second through holes 24112 also has a heat dissipation function. Through the existence of these through holes, part of the bus bar 23 can be directly exposed, thereby helping to dissipate the heat generated by the battery module during operation, reducing the working temperature of the bus bar 23, and facilitating the detection of the temperature in the battery module by the flexible circuit board 24.

[0052] Further, the plurality of first through holes 24111 and the plurality of second through holes 24112 are arranged in intervals along the width direction Y to adapt to the interval arrangement of the plurality of single batteries 1 in the width direction Y, ensuring that each single battery 1 can be connected to the corresponding bus bar group through the first through holes 24111 and the second through holes 24112.

[0053] Further, a plurality of soldering points 243 are formed on the flexible circuit board 24, and along the length direction X, each soldering point 243 is located between two adjacent first through holes 24111. By arranging the soldering points 243 between the two adjacent first through holes 24111, the space of the flexible circuit board 24 in the length direction X is fully utilized, and the formation of the soldering points 243 between the two adjacent first through holes 24111 also helps to improve the uniformity and stability of the soldering fixation.

[0054] In some embodiments, please refer to Figure 5The busbar group includes a plurality of busbars 231. The plurality of busbars 231 are arranged at intervals along the length direction X. Each busbar 231 is arranged in alignment with at least two adjacent first through holes 24111 and two adjacent second through holes 24112, and the two first through holes 24111 and the two second through holes 24112 are arranged out of alignment in the width direction Y. It should be noted that the four first through holes 24111 and second through holes 24112 arranged out of alignment specifically refer to two first through holes 24111 and two second through holes 24112 adjacent along the length direction X, and the two first through holes 24111 and the corresponding two second through holes 24112 are arranged out of alignment in the width direction Y. Through such out-of-alignment arrangement, reliable electrical contact of the busbar 231 with the positive and negative electrode portions can be ensured, and the connection stability of the entire busbar assembly 2 can be improved. In more detail, when each busbar 231 is arranged along the length direction X, the connection position thereof spans two first through holes 24111 and two second through holes 24112 in the length direction X, and spans adjacent first through holes 24111 and second through holes 24112 in the width direction Y. Through the out-of-alignment arrangement in the width direction Y, the busbar 231 and the through hole can more efficiently utilize the space of the flexible circuit board 24, avoiding the case of mutual interference between the through holes, and ensuring the independence of electrical connection.

[0055] In some embodiments, the busbar 231 includes a first sub-bar 2311, a second sub-bar 2312, and an inclined segment 2313. The first sub-bar 2311 and the second sub-bar 2312 are connected by the inclined segment 2313, and the first sub-bar 2311 and the second sub-bar 2312 are arranged out of alignment in the width direction Y. A portion of the first sub-bar 2311 is arranged in alignment with one first through hole 24111, and a portion thereof is arranged in alignment with an adjacent one first through hole 24111, i.e., the first sub-bar 2311 can expose two portions through two adjacent first through holes 24111 in the length direction X, and the electrical properties of the two portions are opposite. Similarly, a portion of the second sub-bar 2312 is arranged in alignment with one second through hole 24112, and a portion thereof is arranged in alignment with an adjacent one second through hole 24112, i.e., the second sub-bar 2312 can expose two portions through two adjacent second through holes 24112 in the length direction X, and the electrical properties of the two portions are opposite. For the first sub-bar 2311 and the second sub-bar 2312, the structure and size are the same, facilitating centralized production of the busbar 231. In addition, the first sub-bar 2311 and the second sub-bar 2312 are connected by the inclined segment 2313, which can not only ensure that the first sub-bar 2311 and the second sub-bar 2312 are arranged out of alignment in the width direction Y, but also reduce the number of alignments of the busbar 231.

[0056] Further, the first sub-tab 2311 comprises a positive electrode connecting portion 23111, a negative electrode connecting portion 23112, and a solder bump 23113. The positive electrode connecting portion 23111 and the negative electrode connecting portion 23112 are integrally formed along the length direction X, and the solder bump 23113 is provided on the positive electrode connecting portion 23111 and protrudes towards the second insulating layer 22. The solder bump 23113 protrudes towards the second insulating layer 22, facilitating soldering of the first sub-tab 2311. The positive electrode connecting portion 23111 of the first sub-tab 2311 is connected in alignment with one first through hole 24111, so that the first through hole 24111 can expose the positive electrode connecting portion 23111, and the negative electrode connecting portion 23112 is connected in alignment with another first through hole 24111 adjacent in the length direction X, so that the another first through hole 24111 can expose the negative electrode connecting portion 23112. Similarly, since the second sub-tab 2312 has the same structure size as the first sub-tab 2311, the second sub-tab 2312 also has corresponding positive electrode connecting portion 23111, negative electrode connecting portion 23112, and solder bump 23113, which will not be described here.

[0057] Further, the positive electrode connecting portion 23111 is provided with a positive electrode positioning notch 23114, and the negative electrode connecting portion 23112 is provided with a negative electrode positioning notch 23115. The positive electrode positioning notch 23114 and the negative electrode positioning notch 23115 are aligned in the length direction X. When the busbar 23 is stacked on the single battery 1, the positive electrode positioning notch 23114 and the negative electrode positioning notch 23115 of the positive electrode connecting portion 23111 and the negative electrode connecting portion 23112, respectively, cooperate with the preset positioning plate, so that the busbar 23 can be accurately and quickly stacked on the single battery 1, and then the positioning plate can be removed.

[0058] In some embodiments, the busbar 23 further comprises a positive busbar plate 232, a negative busbar plate 233, a positive plate 234, a negative plate 235, and a plurality of intermediate busbar plates 236. The positive plate 234 and the negative plate 235 are arranged diagonally opposite, specifically, the busbar 23 is in a rectangular shape, and the positive plate 234 and the negative plate 235 are located near the diagonally opposite corners. The positive plate 234 is connected to the positive busbar plate 232, and the negative plate 235 is connected to the negative busbar plate 233. The positive busbar plate 232 is connected to the positive connection part 23111 of the first sub-plate 2311 and the positive connection part 23111 of the second sub-plate 2312 of one busbar sheet 231 at the end away from the positive plate 234, and the negative busbar plate 233 is connected to the negative connection part 23112 of the first sub-plate 2311 and the negative connection part 23112 of the second sub-plate 2312 of one busbar sheet 231 at the end away from the negative plate 235. The integrated connection of a plurality of single batteries 1 can be achieved by one positive busbar plate 232, one negative busbar plate 233, a plurality of busbar sheet groups, and a plurality of intermediate busbar plates 236. The number of single batteries 1 is much greater than the number of intermediate busbar plates 236 and also greater than the number of busbar sheets 231. The first sub-plate 2311 in each busbar sheet 231 is connected to one single battery 1, and the second sub-plate 2312 is connected to one single battery 1, that is, one busbar sheet 231 can be connected to two single batteries 1 at the same time.

[0059] In addition, the intermediate busbar plates 236 are arranged along the width direction Y and the length direction X, and the plurality of intermediate busbar plates 236 are all located on the current path conducted by the positive busbar plate 232 and the negative busbar plate 233, and the current path is in a serpentine shape. Specifically, at least one intermediate busbar plate 236 is arranged along the width direction Y, and in this embodiment, two intermediate busbar plates 236 are arranged along the width direction Y, and at least two intermediate busbar plates 236 are arranged along the length direction X. The two intermediate busbar plates 236 are arranged in a staggered manner along the length direction X to correspond to the diagonal arrangement of the positive plate 234 and the negative plate 235. At this time, the current path is that the current flows from the positive plate 234 along the length direction X through the first intermediate busbar plate 236, then flows through the intermediate busbar plate 236 along the length direction X towards the other intermediate busbar plate 236 opposite to it, and then flows towards the other intermediate busbar plate 236, so that the current flow path is in a back-and-forth serpentine shape. Correspondingly, the structure formed by the positive busbar plate 232, the plurality of intermediate busbar plates 236, and the negative busbar plate 233 is in a serpentine shape, thereby improving the integration of the plurality of single batteries 1.

[0060] It should be further noted that the intermediate busbar plate 236 has four connection ends, that is, one intermediate busbar plate 236 can connect two groups of busbar sheet groups adjacent in the width direction Y, which is beneficial to saving costs.

[0061] To sum up, the technical scheme provided in the application is mainly that the flexible circuit board 24 is arranged as a plate body, and a plurality of hollow parts for exposing the positive and negative parts of the bus bars 23 are formed on the flexible circuit board 24, so that the flexible circuit board 24 can be integrally formed in a plate body shape on the basis of not interfering with the exposure of the positive and negative of the bus bars 23, thereby when the bus bars 23, the flexible circuit board 24, the first insulating layer 21 and the second insulating layer 22 are laminated and assembled, the assembly and fixation of the multi-layer assembly can be realized by only one alignment and one unified welding, which is beneficial to improve the efficiency of the assembly and formation of the bus bar assembly 2, and then improve the production efficiency of the battery module.

[0062] The above describes the embodiments of the application in detail, and the principles and implementation manners of the application are described by applying specific examples; the above embodiment description is only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, the specific implementation manner and application range can be changed according to the idea of the application; in conclusion, the content of the specification should not be understood as a limitation of the application.

Claims

1. A busbar assembly, characterized in that, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model discloses a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model discloses a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

2. The busbar assembly of claim 1, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

3. The busbar assembly of claim 2, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

4. The busbar assembly of any one of claims 1 to 3, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

5. The busbar assembly of claim 4, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

6. The busbar assembly of claim 5, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

7. The busbar assembly of claim 6, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

8. The busbar assembly of claim 6, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

9. The busbar assembly of claim 8, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

10. The busbar assembly of claim 9, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack.

11. The busbar assembly of claim 10, wherein, The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit board and a battery pack, and relates to the technical field of battery pack. The utility model relates to a flexible circuit 12. The busbar assembly of claim 10, wherein, The busbar further comprises a positive busbar plate, a negative busbar plate, a positive plate, a negative plate and a plurality of intermediate busbar plates, the positive plate and the negative plate are oppositely arranged, the positive plate is connected with the positive busbar plate, the negative plate is connected with the negative busbar plate, the positive busbar plate is connected with the positive connection part of the first sub-piece and the positive connection part of the second sub-piece of one of the busbar pieces at the end away from the positive plate, the negative busbar plate is connected with the negative connection part of the first sub-piece and the negative connection part of the second sub-piece of one of the busbar pieces at the end away from the negative plate, the plurality of intermediate busbar plates are arranged along the width direction and the length direction, and the plurality of intermediate busbar plates are located on the current path conducted by the positive busbar plate and the negative busbar plate, and the structure formed by the positive busbar plate, the plurality of intermediate busbar plates and the negative busbar plate is in a serpentine shape.

13. A battery module, characterized by The battery pack comprises a plurality of single batteries and the busbar assembly as claimed in any one of claims 1 to 12, the plurality of single batteries are arranged and distributed along the length direction and the width direction, and along the width direction, the adjacent single batteries are arranged in a staggered manner, and the plurality of single batteries are connected with the busbar.

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