Battery integrated busbar and secondary battery

Abstract

This invention provides an integrated battery busbar and a secondary battery. The integrated battery busbar includes multiple current guiding mechanisms, which are spaced apart along the axial direction of the cylindrical battery. Adjacent current guiding mechanisms are electrically connected. Each current guiding mechanism includes two sets of oppositely arranged and electrically connected current guiding components, and different current guiding components are electrically connected to different battery packs. This invention solves the problem of poor adaptability of existing integrated battery busbars.

Description

Technical Field

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

[0002] CCS (Cell Contacting System) is one of the core components of a large cylindrical battery system. In traditional large cylindrical battery systems, the large cylindrical batteries are placed vertically, and CCS is mostly designed and developed for this type of battery placement. However, there are few corresponding CCS designs for large cylindrical battery systems that are placed horizontally.

[0003] Therefore, existing technologies have the problem that the battery integrated busbar cannot be adapted to horizontally placed cylindrical batteries. Utility Model Content

[0004] The main objective of this invention is to provide a battery integrated busbar and a secondary battery to solve the problem of poor adaptability of the existing battery integrated busbar.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery integrated busbar is provided, including multiple current guiding mechanisms. The multiple current guiding mechanisms are spaced apart along the axial direction of the cylindrical battery, and adjacent current guiding mechanisms are electrically connected. Each current guiding mechanism includes two sets of oppositely arranged and electrically connected current guiding components, and different current guiding components are electrically connected to different battery packs.

[0006] Furthermore, the current guiding assembly includes: an FPC having a connector and multiple connecting tabs; and multiple first conductive bars, one end of which is connected to the connecting tabs, and the other end of which is connected to the cylindrical cells of the battery pack.

[0007] Furthermore, the first conductive bus has at least two first positive terminals and at least two first negative terminals, with different first positive terminals and different first negative terminals respectively connected to different cylindrical batteries; and / or one of the first positive terminals of one of two adjacent first conductive buses and one of the first negative terminals of the other first conductive bus are respectively connected to the same cylindrical battery.

[0008] Furthermore, the battery integrated busbar also includes a second conductive busbar, through which adjacent current guiding mechanisms are electrically connected.

[0009] Further, the second conductive bus includes: a conductive segment, one end of which is connected to a connecting piece of the FPC of one current-guiding component of one of the current-guiding mechanisms, and the other end of which is connected to a connecting piece of the FPC of one current-guiding component of another current-guiding mechanism; at least two second positive terminal connections, the two second positive terminal connections being located at one end of the conductive segment, and two different cylindrical batteries in one of the battery packs corresponding to one of the two adjacent current-guiding mechanisms being respectively connected to the two second positive terminal connections; and at least two second negative terminal connections, the two second negative terminal connections being located at the other end of the conductive segment, and two different cylindrical batteries in one of the battery packs corresponding to another of the two adjacent current-guiding mechanisms being respectively connected to the two second negative terminal connections.

[0010] Furthermore, the flow guiding mechanism also includes a third conductive busbar, through which the two flow guiding components of the flow guiding mechanism are electrically connected.

[0011] Furthermore, the third conductive bus has at least two third positive terminals and at least two third negative terminals, which are respectively connected to cylindrical cells of different battery packs.

[0012] Furthermore, the flow guiding assembly also includes: a sealing housing, with an installation gap between the two sealing housings of the two flow guiding assemblies arranged opposite each other to avoid the liquid cooling plate; a mounting bracket, which is disposed on the side of the two sealing housings of the two flow guiding assemblies that are far apart from each other, a first conductive busbar is disposed between the sealing housing and the mounting bracket, and the mounting bracket is provided with a first mounting groove corresponding to the FPC, with at least a portion of the FPC disposed in the first mounting groove.

[0013] Furthermore, the side of the sealed housing away from the mounting bracket forms a filling space with the liquid cooling plate, and the filling space is filled with thermally conductive adhesive.

[0014] Furthermore, the periphery of the sealing housing facing the liquid cooling plate has a sealing groove, and the sealing groove is filled with a sealing strip; and / or the periphery of the sealing housing has an injection hole, through which thermally conductive adhesive is injected into the filling space; and / or the side of the sealing housing facing the liquid cooling plate has at least one support column extending toward the liquid cooling plate.

[0015] Furthermore, the battery integrated busbar also includes a positive output electrode conductive busbar and a negative output electrode conductive busbar, which are respectively connected to different current guiding mechanisms, and the mounting bracket is provided with a second mounting groove corresponding to the positive output electrode conductive busbar or the negative output electrode conductive busbar.

[0016] According to another aspect of the present invention, a secondary battery is provided, comprising: multiple battery packs, each battery pack having multiple cylindrical cells, the multiple battery packs being spaced apart along the axial direction of the cylindrical cells; and the aforementioned battery integrated busbar.

[0017] Furthermore, the secondary battery also includes a thermal management component, which has multiple liquid cooling plates. There is a liquid cooling plate between any two adjacent battery packs. The thickness direction of the liquid cooling plate is parallel to the axial direction of the cylindrical battery, and the number of current guiding mechanisms of the battery integrated busbar is equal to the number of liquid cooling plates and corresponds one-to-one.

[0018] Applying the technical solution of this utility model, the battery integrated busbar in this application includes multiple current guiding mechanisms. The multiple current guiding mechanisms are arranged at intervals along the axial direction of the cylindrical battery. Adjacent current guiding mechanisms are electrically connected. The current guiding mechanism includes two sets of oppositely arranged and electrically connected current guiding components, and different current guiding components are electrically connected to different battery packs.

[0019] When using the battery integrated busbar of this application, because the battery integrated busbar has multiple current guiding mechanisms spaced apart along the axial direction of the cylindrical battery, the battery integrated busbar of this application can adapt to a horizontally placed large cylindrical battery system through the current guiding mechanisms. That is, when the cylindrical batteries of the battery pack in the secondary battery are placed horizontally, the current guiding mechanism can be electrically connected to the two battery packs respectively through two different current guiding components. Therefore, the battery integrated busbar of this application effectively solves the problem of poor adaptability of the battery integrated busbar in the prior art. Attached Figure Description

[0020] 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:

[0021] Figure 1 An exploded view of the battery integration busbar and battery pack of a secondary battery in a specific embodiment of this application is shown;

[0022] Figure 2 This invention illustrates a partial structure of the current-guiding assembly of the battery integrated busbar of a secondary battery and an exploded view of the battery pack in a specific embodiment of this application.

[0023] Figure 3 A schematic diagram of the mounting bracket for the battery integrated busbar is shown in a specific embodiment of this application;

[0024] Figure 4 This illustration shows a partial structural diagram of the sealed housing of the battery integrated busbar in one specific embodiment of this application;

[0025] Figure 5A schematic diagram of the structure of the first conductive busbar of the battery integrated busbar is shown in a specific embodiment of this application;

[0026] Figure 6 A schematic diagram of the structure of the second conductive busbar of the battery integrated busbar is shown in a specific embodiment of this application;

[0027] Figure 7 This invention illustrates a schematic diagram of the third conductive busbar of the battery integrated busbar in a specific embodiment of the present application.

[0028] Figure 8 This invention illustrates a schematic diagram of the positive output electrode conductive busbar of a battery integrated busbar in a specific embodiment of this application.

[0029] Figure 9 This invention illustrates a schematic diagram of the negative output electrode conductor of the battery integrated busbar in a specific embodiment of the present application.

[0030] Figure 10 A schematic diagram of the welding of the first conductive busbar of the battery integrated busbar to the cylindrical battery is shown in a specific embodiment of this application;

[0031] Figure 11 An exploded view of a secondary battery according to a specific embodiment of this application is shown.

[0032] The above figures include the following reference numerals:

[0033] 10. Flow guiding mechanism; 11. Flow guiding assembly; 111. FPC; 1111. Connector; 1112. Connecting piece; 112. First conductive bar; 1121. First positive terminal; 1122. First negative terminal; 113. Sealing shell; 1131. Sealing groove; 1132. Sealing strip; 1133. Injection hole; 1134. Support column; 114. Mounting bracket; 1141. First mounting groove; 1142. Second mounting groove; 1143. Base; 1144. Hexagonal nut; 1145. Top cover; 12. Third guide bar 121. Electric busbar; 122. Third positive terminal connection; 123. Third negative terminal connection; 20. Battery pack; 21. Cylindrical battery; 30. Second conductive busbar; 31. Conductive section; 32. Second positive terminal connection; 33. Second negative terminal connection; 40. Positive output conductive busbar; 50. Negative output conductive busbar; 60. Thermal management assembly; 61. Liquid cooling plate; 70. Housing; 71. Housing top cover; 72. Bolt; 73. Sealing strip; 74. Upper plastic bracket; 75. Lower plastic bracket; 76. Buffer silicone pad; 77. BDU; 78. BMS. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] To address the problem of poor adaptability of battery integrated busbars in the prior art, this application provides a battery integrated busbar and a secondary battery.

[0038] Furthermore, the secondary battery in this application includes: multiple battery packs 20, each battery pack 20 having multiple cylindrical cells 21, the multiple battery packs 20 being spaced apart along the axial direction of the cylindrical cells 21; and the battery integrated busbar described below. That is, in this application, the battery pack 20 of the secondary battery has multiple horizontally placed cylindrical cells 21.

[0039] Specifically, in this application, the axial direction of the cylindrical battery 21 can be a first direction, and each battery pack 20 has at least two groups of cylindrical batteries 21 arranged along a second direction, with the cylindrical batteries 21 in the same group arranged along a third direction. Furthermore, different groups of cylindrical batteries 21 can be staggered relative to each other in the third direction. In the above, the first direction, the second direction, and the third direction are mutually perpendicular.

[0040] In the following embodiments of this application, each battery pack 20 includes two sets of cylindrical battery packs arranged along a second direction, and each set of cylindrical battery packs includes a plurality of cylindrical batteries 21 arranged along a third direction.

[0041] like Figures 1 to 11 As shown, the battery integrated busbar in this application includes multiple current guiding mechanisms 10. These mechanisms 10 are spaced apart along the axial direction of the cylindrical battery 21. Adjacent current guiding mechanisms 10 are electrically connected. Each current guiding mechanism 10 includes two sets of opposing and electrically connected current guiding components 11, and different current guiding components 11 are electrically connected to different battery packs 20. In other words, the multiple current guiding mechanisms 10 are spaced apart along a first direction, and the two current guiding components 11 of the same current guiding mechanism 10 are also spaced apart along the first direction.

[0042] When using the battery integrated busbar of this application, since the battery integrated busbar has multiple current guiding mechanisms 10 spaced apart along the axial direction of the cylindrical battery 21, the battery integrated busbar of this application can adapt to a horizontally placed large cylindrical battery 21 system through the current guiding mechanisms 10. That is, when the cylindrical batteries 21 of the battery pack 20 in the secondary battery are placed horizontally, the current guiding mechanism 10 can be electrically connected to the two battery packs 20 respectively through two different current guiding components 11. Therefore, the battery integrated busbar of this application effectively solves the problem of poor adaptability of the battery integrated busbar in the prior art.

[0043] Specifically, the current guiding assembly 11 includes: an FPC 111, which has a connector 1111 and multiple connecting tabs 1112; and multiple first conductive bars 112, one end of which is connected to the connecting tab 1112, and the other end of which is connected to the cylindrical battery 21 of the battery pack 20. Furthermore, in this application, the FPC 111 can be connected to the low-voltage wiring harness plug of the secondary battery via the connector 1111. Simultaneously, in this application, the multiple first conductive bars 112 can be arranged according to the arrangement of the cylindrical batteries 21 in the battery pack 20, so that the first conductive bars 112 are welded to the FPC 111 simultaneously with the connecting tabs 1112.

[0044] In one specific embodiment of this application, the FPC 111 is L-shaped and includes a first plate segment and a second plate segment that are perpendicular to each other. A plurality of connecting pieces 1112 are spaced apart on the first plate segment along its length, and a connector 1111 is provided at the end of the second plate segment away from the first plate segment. Furthermore, in this application, for two adjacent flow guiding mechanisms 10, the FPC 111s of the two flow guiding components 11 that are close to each other can be interconnected and share a single connector 1111. Of course, the two FPCs 111 can also each have different connectors 1111. The specific configuration can be adaptively adjusted according to actual design requirements.

[0045] Optionally, the first conductive bus 112 has at least two first positive terminal 1121 and at least two first negative terminal 1122, and different first positive terminal 1121 and different first negative terminal 1122 are respectively connected to different cylindrical batteries 21.

[0046] Optionally, one of the first positive terminal 1121 of one of the two adjacent first conductive bars 112 and one of the first negative terminal 1122 of the other first conductive bar 112 are respectively connected to the same cylindrical battery 21.

[0047] In one specific embodiment of this application, the first conductive bus 112 has at least two first positive terminal connections 1121 and at least two first negative terminal connections 1122, with different first positive terminal connections 1121 and different first negative terminal connections 1122 respectively connected to different cylindrical batteries 21. Furthermore, one first positive terminal connection 1121 of one of two adjacent first conductive buses 112 and one first negative terminal connection 1122 of the other first conductive bus 112 are respectively connected to the same cylindrical battery 21. In this embodiment, the two first positive terminal connections 1121 of the first conductive bus 112 are respectively welded to the positive terminals of two different cylindrical batteries 21, and for these two cylindrical batteries 21, they are batteries in two different cylindrical battery packs of the battery pack 20. Therefore, the two first positive terminal connections 1121 of the first conductive bus 112 can be considered to be approximately spaced apart along the second direction. However, since the cylindrical cells 21 of the two cylindrical battery packs are staggered, there is an angle greater than 0 degrees between the line connecting the two first positive terminal connections 1121 and the second direction. As for the two first negative terminal connections 1122 of the first conductive bus 112, the arrangement is similar to that of the first positive terminal connections 1121, so it will not be described again.

[0048] Furthermore, the two first positive terminal connections 1121 and two first negative terminal connections 1122 of the first conductive busbar 112 can be divided into two groups. One group of first positive terminal connections 1121 and first negative terminal connections 1122 are spaced apart along a third direction and welded to two adjacent cylindrical batteries 21 of one cylindrical battery pack. The other group of first positive terminal connections 1121 and first negative terminal connections 1122 are also spaced apart along a third direction and welded to two adjacent cylindrical batteries 21 of another cylindrical battery pack. In this application, the welding portion of the first positive terminal connection 1121 to the cylindrical battery 21 is circular or approximately circular, and the welding portion of the first negative terminal connection 1122 to the cylindrical battery 21 is arc-shaped or approximately arc-shaped. This arrangement ensures the welding strength with the battery while reducing the material required for the production of the first conductive busbar 112.

[0049] Specifically, the battery integrated busbar also includes a second conductive busbar 30, through which adjacent current guiding mechanisms 10 are electrically connected. In this application, by providing the second conductive busbar 30, multiple battery packs 20 of the secondary battery can be connected in series or in parallel.

[0050] In one specific embodiment of this application, the second conductive bus 30 includes: a conductive segment 31, one end of which is connected to a connecting piece 1112 of the FPC 111 of one of the current guiding components 11 of one of the current guiding mechanisms 10, and the other end of which is connected to a connecting piece 1112 of the FPC 111 of one of the current guiding components 11 of another current guiding mechanism 10; at least two second positive terminal connections 32, which are located at one end of the conductive segment 31, and two different cylindrical batteries 21 in one of the battery packs 20 corresponding to one of the two adjacent current guiding mechanisms 10 are respectively connected to the two second positive terminal connections 32; and at least two second negative terminal connections 33, which are located at the other end of the conductive segment 31, and two different cylindrical batteries 21 in one of the battery packs 20 corresponding to another of the two adjacent current guiding mechanisms 10 are respectively connected to the two second negative terminal connections 33. Furthermore, in this embodiment, the cylindrical batteries 21 welded to the two second positive terminal connection 32 are located in different cylindrical battery packs. Therefore, the two second positive terminal connection 32 can be considered to be approximately spaced apart along the second direction. Since the cylindrical batteries 21 of the two sets of cylindrical battery packs are staggered, there is an angle greater than 0 degrees between the line connecting the two second positive terminal connection 32 and the second direction. The connection method of the two second negative terminal connection 33 is the same as that of the two second positive terminal connection 32, so it will not be described again. In this application, the two second positive terminal connection 32 and the two second negative terminal connection 33 are respectively connected to the cylindrical batteries 21 located at the ends in the third direction of the cylindrical battery pack. At the same time, in this application, the conductive segment 31 of the second conductive bus 30 is welded to the connecting piece 1112 of the first plate segment of the FPC111 near the second plate segment.

[0051] In one specific embodiment of this application, the secondary battery has a total of 6 battery packs 20, and the battery integrated busbar has three current guiding mechanisms 10, two second conductive busbars 30, and the second conductive busbars 30 are arranged between the two adjacent current guiding components 11 of the two adjacent current guiding mechanisms 10.

[0052] Specifically, the current guiding mechanism 10 further includes a third conductive bus 12, through which the two current guiding components 11 of the current guiding mechanism 10 are electrically connected. Furthermore, the third conductive bus 12 has at least two third positive terminal connections 121 and at least two third negative terminal connections 122, which are respectively connected to the cylindrical batteries 21 of different battery packs 20.

[0053] In one specific embodiment of this application, the third positive terminal 121 and the third negative terminal 122 of the third conductive bus 12 are spaced apart along a third direction, and the two third positive terminal 121 are spaced apart along a second direction, with the line connecting the two third positive terminal 121 having an angle greater than 0 degrees with the second direction; the two third negative terminal 122 are spaced apart along the second direction, with the line connecting the two third negative terminal 122 having an angle greater than 0 degrees with the second direction. That is, in this application, the two third positive terminal 121 and the two third negative terminal 122 of the third conductive bus 12 are respectively provided for two battery packs 20, wherein the two third positive terminal 121 are welded to two cylindrical batteries 21 of the same battery pack 20, and the two cylindrical batteries 21 are respectively located in two cylindrical battery packs; the two third negative terminal 122 are welded to two cylindrical batteries 21 of another battery pack 20, and the two cylindrical batteries 21 are respectively located in two cylindrical battery packs. Furthermore, in this application, the third conductive bus 12 is welded to the connecting piece 1112 at the end of the first plate segment of FPC 111 that is away from the second plate segment.

[0054] It should be noted that in this application, the first conductive bus 112, the second conductive bus 30, and the third conductive bus 12 can all be made of copper.

[0055] Specifically, the flow guiding assembly 11 further includes a sealing shell 113 and a mounting bracket 114. The two sealing shells 113 of the two flow guiding assemblies 11, which are arranged opposite each other, have a mounting gap to avoid the liquid cooling plate 61. The mounting bracket 114 is located on the side of the two sealing shells 113 of the two flow guiding assemblies that are far apart from each other. The first conductive bus 112 is located between the sealing shell 113 and the mounting bracket 114, and the mounting bracket 114 has a first mounting groove 1141 corresponding to the FPC 111. At least a portion of the FPC 111 is located within the first mounting groove 1141. Further, the side of the sealing shell 113 away from the mounting bracket 114 and the liquid cooling plate 61 form a filling space, which is filled with thermally conductive adhesive. In this application, the mounting bracket 114 has mounting holes to avoid the cylindrical battery 21. The welding end of the cylindrical battery 21 passes through the mounting holes and is welded to the first conductive bus 112, the second conductive bus 30, and the third conductive bus 12.

[0056] Optionally, the periphery of the sealed housing 113 facing the liquid cooling plate 61 has a sealing groove 1131, and the sealing groove 1131 is filled with a sealing strip 1132.

[0057] Optionally, the periphery of the sealing housing 113 has an injection hole 1133 through which thermally conductive adhesive is injected into the filling space.

[0058] Optionally, the sealed housing 113 has at least one support column 1134 extending toward the liquid cooling plate 61 on the side facing the liquid cooling plate 61.

[0059] Furthermore, in this application, the sealing shell 113 can be made of plastic material.

[0060] In one specific embodiment of this application, the periphery of the sealing housing 113 facing the liquid cooling plate 61 has a sealing groove 1131, and the sealing groove 1131 is filled with a sealing strip 1132. The periphery of the sealing housing 113 has an injection hole 1133, through which thermally conductive adhesive is injected into the filling space, and in a second direction, the injection hole 1133 is located on the top edge of the sealing housing 113. At the same time, the side of the sealing housing 113 facing the liquid cooling plate 61 has a plurality of support columns 1134 extending toward the liquid cooling plate 61, and the plurality of support columns 1134 respectively abut against the liquid cooling plate 61. Furthermore, when the liquid cooling plate 61 and the sealing shell 113 are assembled in this application, the sealing strip 1132 is squeezed, and the sealing groove 1131, the frame of the sealing shell 113 and the support column 1134 abut against the liquid cooling plate 61, and the three play a supporting role. At this time, a space is formed between the sealing shell 113 and the liquid cooling plate 61, and thermally conductive structural adhesive can be filled into it through the glue injection hole 1133, thereby enhancing the heat dissipation effect.

[0061] Specifically, the battery integrated busbar also includes a positive output electrode conductive busbar 40 and a negative output electrode conductive busbar 50. The positive output electrode conductive busbar 40 and the negative output electrode conductive busbar 50 are respectively connected to different current guiding mechanisms 10, and the mounting bracket 114 is provided with a second mounting groove 1142 corresponding to the positive output electrode conductive busbar 40 or the negative output electrode conductive busbar 50. In a specific embodiment of this application, in the first direction, that is, in the axial direction of the cylindrical battery 21, the positive output electrode conductive busbar 40 and the negative output electrode conductive busbar 50 are respectively welded to the connecting pieces 1112 of the FPC111 of the two current guiding components 11 located at both ends of the first direction. At the same time, the positive output electrode conductive busbar 40 is respectively welded to the positive electrode of the two cylindrical batteries 21 of one battery pack 20, and the negative output electrode conductive busbar 50 is respectively welded to the negative electrode of the two cylindrical batteries 21 of the other battery pack 20. Meanwhile, for the portions of the positive output electrode conductor 40 and the negative output electrode conductor 50 located in the second mounting groove 1142, the second mounting groove 1142 is respectively provided with a base 1143, a hexagonal nut 1144, and a top cover 1145 at the ends of the positive output electrode conductor 40 and the negative output electrode conductor 50. The hexagonal nut 1144 fixes the ends of the positive output electrode conductor 40 and the top cover 1145 protects the ends of the positive output electrode conductor 40 and the negative output electrode conductor 50. Furthermore, the positive output electrode conductor 40 and the negative output electrode conductor 50 can also be connected to the high-voltage wiring harness of the secondary battery.

[0062] In this application, as Figure 11 As shown, the secondary battery also includes a thermal management component 60, which has multiple liquid cooling plates 61. One liquid cooling plate 61 is located between any two adjacent battery packs 20. The thickness direction of the liquid cooling plate 61 is parallel to the axial direction of the cylindrical battery 21, and the number of current guiding mechanisms 10 of the battery integrated busbar is equal to and corresponds one-to-one with the number of liquid cooling plates 61. Additionally, in this application, the secondary battery may also include a housing 70 and a housing top cover 71, which are fixed together by bolts 72. A sealing strip 73 may also be provided between the housing 70 and the housing top cover 71. The battery packs 20, the battery integrated busbar, and the thermal management component 60 are disposed within the space enclosed by the housing and the housing top cover. Furthermore, an upper plastic bracket 74 and a lower plastic bracket 75 may be respectively provided above and below the assembly consisting of the battery packs 20, the battery integrated busbar, and the thermal management component 60. A buffer silicone pad 76 may also be provided between the lower plastic bracket 75 and the bottom surface of the housing 70. Of course, secondary batteries can also have structures such as BDU77 and BMS78.

[0063] As can be seen from the above description, the embodiments of this utility model achieve the following technical effects:

[0064] 1. Effectively solves the problem of poor adaptability of battery integrated busbars in existing technologies;

[0065] 2. Simple structure and stable performance.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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. A battery integrated busbar, characterized in that, It includes multiple flow guiding mechanisms (10), which are spaced apart along the axial direction of the cylindrical battery (21). Adjacent flow guiding mechanisms (10) are electrically connected. Each flow guiding mechanism (10) includes two sets of flow guiding components (11) that are arranged opposite to each other and electrically connected. Different flow guiding components (11) are electrically connected to different battery packs (20).

2. The battery-integrated busbar according to claim 1, wherein The flow guiding component (11) includes: FPC (111), the FPC (111) having a connector (1111) and a plurality of connecting pieces (1112); Multiple first conductive bars (112) are provided, one end of which is connected to the connecting piece (1112), and the other end of which is connected to the cylindrical battery (21) of the battery pack (20).

3. The battery-integrated busbar according to claim 2, characterized by, The first conductive bus (112) has at least two first positive terminal connections (1121) and at least two first negative terminal connections (1122). Different first positive terminal (1121) and different first negative terminal (1122) are respectively connected to different cylindrical batteries (21); and / or One of the first positive terminal (1121) of one of the two adjacent first conductive bars (112) and one of the first negative terminal (1122) of the other first conductive bar (112) are respectively connected to the same cylindrical battery (21).

4. The battery integrated busbar according to claim 2, wherein, The battery integrated busbar also includes: The second conductive bus (30) is electrically connected to the adjacent flow guiding mechanism (10) via the second conductive bus (30).

5. The battery integrated busbar according to claim 4, characterized in that, The second conductive bus (30) includes: A conductive segment (31), one end of which is connected to the connecting piece (1112) of the FPC (111) of one of the flow guiding components (11) of one of the flow guiding mechanisms (10), and the other end of which is connected to the connecting piece (1112) of the FPC (111) of one of the flow guiding components (11) of the other flow guiding mechanism (10); At least two second positive terminal connections (32) are located at one end of the conductive segment (31), and two different cylindrical batteries (21) in one of the battery packs (20) corresponding to one of the two adjacent current guiding mechanisms (10) are respectively connected to the two second positive terminal connections (32). At least two second negative electrode connection terminals (33) are located at the other end of the conductive segment (31), and two different cylindrical batteries (21) in one of the battery packs (20) corresponding to another of the two adjacent current guiding mechanisms (10) are respectively connected to the two second negative electrode connection terminals (33).

6. The battery integrated busbar according to claim 2, wherein, The flow guiding mechanism (10) further includes: The third conductive bus (12) is used to electrically connect the two flow guiding components (11) of the flow guiding mechanism (10).

7. The battery-integrated busbar according to claim 6, characterized by, The third conductive bus (12) has at least two third positive terminal connections (121) and at least two third negative terminal connections (122), and the third positive terminal connections (121) and the third negative terminal connections (122) are respectively connected to the cylindrical batteries (21) of different battery packs (20).

8. The battery-integrated busbar according to any one of claims 2 to 7, characterized in that, The flow guiding component (11) further includes: The two sealed housings (113) of the two oppositely arranged flow guiding assemblies (11) have an installation gap between them for avoiding the liquid cooling plate (61); Mounting bracket (114) is disposed on one side of the two sealing shells (113) of the two flow guiding assemblies (11) that are far apart from each other. The first conductive bus (112) is disposed between the sealing shell (113) and the mounting bracket (114). The mounting bracket (114) is provided with a first mounting groove (1141) corresponding to the FPC (111). At least a portion of the FPC (111) is disposed in the first mounting groove (1141).

9. The battery-integrated busbar according to claim 8, characterized by, The sealed outer shell (113) on the side away from the mounting bracket (114) forms a filling space with the liquid cooling plate (61), and the filling space is filled with thermally conductive adhesive.

10. The battery integrated busbar according to claim 9, characterized in that, The sealing housing (113) has a sealing groove (1131) on the periphery of the side facing the liquid cooling plate (61), and the sealing groove (1131) is filled with a sealing strip (1132); and / or The periphery of the sealed housing (113) has an injection hole (1133), through which the thermally conductive adhesive is injected into the filling space; and / or The sealed housing (113) has at least one support column (1134) extending toward the liquid cooling plate (61) on the side facing the liquid cooling plate (61).

11. The battery integrated busbar of claim 8, wherein, The battery integrated busbar also includes a positive output electrode conductive busbar (40) and a negative output electrode conductive busbar (50). The positive output electrode conductive busbar (40) and the negative output electrode conductive busbar (50) are respectively connected to different current guiding mechanisms (10), and the mounting bracket (114) is provided with a second mounting groove (1142) corresponding to the positive output electrode conductive busbar (40) or the negative output electrode conductive busbar (50).

12. A secondary battery characterized by comprising: include: Multiple battery packs (20), each battery pack (20) having multiple cylindrical cells (21), the multiple battery packs (20) being spaced apart along the axial direction of the cylindrical cells (21); The battery integrated busbar according to any one of claims 1 to 11.

13. The secondary battery according to claim 12, characterized by The secondary battery also includes a thermal management component (60), which has multiple liquid cooling plates (61). There is one liquid cooling plate (61) between any two adjacent battery packs (20). The thickness direction of the liquid cooling plate (61) is parallel to the axial direction of the cylindrical battery (21), and the number of the current guiding mechanism (10) of the battery integrated busbar is equal to the number of the liquid cooling plates (61) and corresponds one-to-one.

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