Busbar assembly and battery pack

Abstract

The application provides a busbar assembly and a battery pack, wherein the busbar assembly comprises a connecting row arranged on a battery module, used for connecting two single batteries arranged adjacently in a first direction in series in the first direction and used for connecting two single batteries arranged adjacently in a second direction in parallel in the second direction; a series connecting row arranged on the upper side of the connecting row, used for connecting two battery modules arranged adjacently in series to form a battery pack; a positive electrode row connected to the positive electrode output end of the battery pack, the positive electrode row being arranged on the top of the battery pack; and a negative electrode row connected to the negative electrode output end of the battery pack, the negative electrode row being arranged on the top of the battery pack. The application can facilitate the wiring layout of the positive electrode row and the negative electrode row by arranging the positive electrode row, the negative electrode row and the series connecting row on the top of the battery module, has small space occupation, high installation stability and is beneficial to improving the safety of the battery pack.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a busbar assembly and a battery pack. Background Technology

[0002] Existing cylindrical power battery packs are mostly developing towards CTP (Cell-to-Pack) technology, which offers high battery energy density and high production efficiency. In a conventional battery pack, a certain number and arrangement of individual cells are divided into a battery module. The battery pack usually includes multiple battery modules and also includes a CCS (Cellular Cell System) assembly to connect the individual cells in each battery module in series and parallel. The battery modules are connected in series with thickened and lengthened copper busbars.

[0003] However, long copper busbars are difficult to route and lay out inside the battery pack. They are generally set up along the circumference of the inner side of the battery pack, which takes up a lot of space. Copper busbars are difficult to install and there is a risk that the battery pack may short-circuit when it is squeezed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a bus assembly that facilitates wiring and layout within a battery pack and occupies little space.

[0005] The second objective of this invention is to provide a battery pack that is highly safe.

[0006] The embodiments of the present invention are achieved through the following technical solutions:

[0007] A busbar assembly includes: a connecting busbar disposed on a battery module for connecting two adjacent individual batteries in series along a first direction, and for connecting two adjacent individual batteries in parallel along a second direction; a series busbar disposed on the upper side of the connecting busbar for connecting two adjacent battery modules in series to form a battery pack; a positive electrode busbar connected to the positive output terminal of the battery pack and disposed on the top of the battery pack; and a negative electrode busbar connected to the negative output terminal of the battery pack and disposed on the top of the battery pack.

[0008] According to a preferred embodiment, the device further includes a first insulating layer, which is disposed between the series busbar, the positive busbar, the negative busbar, and the corresponding connecting busbar.

[0009] According to a preferred embodiment, the first insulating layer is a plastic insulating board, and the series busbar, the positive busbar, and the negative busbar are all laid on the upper surface of the plastic insulating board.

[0010] According to a preferred embodiment, the thickness of the first insulating layer is no greater than 2 mm.

[0011] According to a preferred embodiment, a plurality of first injection ports are provided through the first insulating layer, and the first injection ports are connected to the gaps between two adjacent single cells arranged along the first direction.

[0012] According to a preferred embodiment, the busbar assembly further includes a second insulating layer, which is attached to the upper and lower sides of the connecting bar for fixing all the connecting bars corresponding to the same battery module, or for fixing all the connecting bars corresponding to all the battery modules; the second insulating layer has an operation hole, and the connecting bar is exposed at least partially through the operation hole to connect to the corresponding single battery cell.

[0013] According to a preferred embodiment, the thickness of the positive electrode array and the negative electrode array is no greater than 1 mm.

[0014] According to a preferred embodiment, the positive electrode and the negative electrode are plate-type electrodes.

[0015] According to a preferred embodiment, the positive electrode and the negative electrode are aluminum plate electrodes or copper plate electrodes.

[0016] According to a preferred embodiment, the positive electrode array includes a first body, an extension is disposed at the input end of the first body, a first positive electrode is disposed at the end of the first extension, and the first positive electrode is connected to the positive terminal of the individual battery at the positive electrode output end of the battery pack.

[0017] According to a preferred embodiment, a first weakening hole is provided through the first extension.

[0018] According to a preferred embodiment, the negative electrode array includes a second body, the input end of the second body is provided with a second extension, the end of the second extension is provided with a first negative electrode, and the first negative electrode is connected to the negative terminal of the individual cell at the negative electrode output end of the battery pack.

[0019] According to a preferred embodiment, a second weakening hole is provided through the second extension.

[0020] According to a preferred embodiment, the outer sides of the series bus, the positive bus, and the negative bus are all covered with a third insulating layer; the connection ends of each of the series bus, the positive bus, and the negative bus are exposed outside the third insulating layer.

[0021] According to a preferred embodiment, both the positive electrode and the negative electrode are provided with a second glue inlet corresponding to and communicating with the first glue inlet; the connecting electrode is provided with a third glue inlet corresponding to and communicating with the first glue inlet.

[0022] According to a preferred embodiment, the connecting bar is provided with an overflow hole; both the positive electrode bar and the negative electrode bar are provided with a hole structure corresponding to and communicating with the overflow hole.

[0023] A battery pack including the bus assembly described above.

[0024] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0025] In this invention, the positive and negative busbars, as well as the series busbar, are all located on top of the connecting busbar. The positive and negative busbars are routed at the top of the battery pack, enabling direct output from the positive and negative output terminals of the battery pack to the high-voltage connector of the battery pack. This arrangement offers several advantages: firstly, the large top space of the battery pack facilitates the routing and layout of the positive and negative busbars; secondly, it frees up space around the battery pack, which helps improve the energy density of the battery pack and largely solves the problem of short circuits caused by the high-voltage copper busbar being squeezed when the battery pack is compressed. Furthermore, within the same battery pack housing space, the battery pack using this busbar assembly has a larger compression buffer space, resulting in higher safety. Additionally, since the positive and negative busbars are located on top of the connecting busbar or the battery pack, they receive upward support from the connecting busbar in the longitudinal direction, which helps ensure the structural stability of the connection structure between the positive and negative busbars and the battery pack, further improving the safety of the battery pack. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the exploded structure of a battery pack provided in an embodiment of the present invention;

[0028] Figure 2 This is a three-dimensional structural diagram of a battery pack provided in an embodiment of the present invention;

[0029] Figure 3 This is a top view of the battery pack provided in an embodiment of the present invention;

[0030] Figure 4 A three-dimensional structural diagram of the lower low-pressure busbar provided in an embodiment of the present invention;

[0031] Figure 5 This is a three-dimensional structural diagram of the upper high-voltage busbar provided in an embodiment of the present invention;

[0032] Figure 6 This is an exploded view of the bus assembly provided in an embodiment of the present invention;

[0033] Figure 7 for Figure 6 A partially enlarged schematic diagram of the structure at point A;

[0034] Figure 8 for Figure 6 A magnified view of the structure at point B in the middle;

[0035] Figure 9 This is a three-dimensional structural diagram of the connecting row provided in an embodiment of the present invention;

[0036] Figure 10 This is a three-dimensional structural diagram of a series-connected row provided in an embodiment of the present invention;

[0037] Figure 11 A three-dimensional structural diagram of the positive electrode array provided in an embodiment of the present invention;

[0038] Figure 12 This is a three-dimensional structural diagram of the negative electrode array provided in an embodiment of the present invention.

[0039] Icons: 100, Battery Pack; 101, Battery Module; 102, Single Cell; 201, Second Insulating Layer; 202, Connecting Busbar; 2021, Second Positive Electrode; 2022, Second Negative Electrode; 2023, Second Clearance Notch; 2024, Third Injection Port; 2025, Third Weakening Hole; 2026, Connecting Part; 2027, Overflow Hole; 2028, Working Part; 203, First Insulating Layer; 204, Series Busbar; 2041, Third Main Body; 20 42. Positive electrode module; 2043. Negative electrode module; 205. Positive electrode array; 2051. First positive electrode section; 2052. First extension section; 2053. First weakening hole; 2054. First main body; 206. Negative electrode array; 2061. First negative electrode section; 2062. Second extension section; 2063. Second weakening hole; 2064. First clearance notch; 2065. Second main body; 207. First injection port; 208. Second injection port; 209. Operation hole. Detailed Implementation

[0040] To better understand and implement this invention, the technical solutions in the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings.

[0041] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" used to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0042] In the description of this invention, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more; and the term "and / or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the / described" object or "an" object are also intended to indicate one of a possible plurality of such objects.

[0043] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification, claims and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0044] Furthermore, in the description of this invention, it should be understood that the directional terms such as "upper," "lower," "inner," and "outer" are used to describe the angles shown in the accompanying drawings and should not be construed as limiting specific embodiments. It should also be understood that, in the context of an element or feature being connected "upper," "lower," "inner," or "outer" of another element (one or more), it can be directly connected to the other element (one or more) "upper," "lower," "inner," or "outer," or indirectly connected to the other element (one or more) "upper," "lower," "inner," or "outer" through an intermediate element.

[0045] Please refer to Figures 1 to 12A busbar assembly includes a connecting busbar 202, a series busbar 204, a positive electrode busbar 205, and a negative electrode busbar 206, wherein: the connecting busbar 202 is disposed on a battery module 101 for connecting two adjacent individual batteries 102 in series in a first direction, and for connecting two adjacent individual batteries 102 in parallel in a second direction; the series busbar 204 is laid on the upper side of the connecting busbar 202 for connecting two adjacent battery modules 101 in series to form a battery pack 100; the positive electrode busbar 205 is connected to the positive output terminal of the battery pack 100 and is laid on the top of the battery pack 100; the negative electrode busbar 206 is connected to the negative output terminal of the battery pack 100 and is laid on the top of the battery pack 100.

[0046] In this embodiment, as Figure 1 and Figure 3 As shown, the bus assembly provided in this embodiment is applied to a battery pack, which includes, as shown in the figure, a busbar assembly used in a battery pack. Figure 3 The eight battery modules 101 shown constitute two battery packs 100.

[0047] Specifically, such as Figure 1 and Figure 3 As shown, the first direction refers to... Figure 1 The front and rear directions of the battery pack are shown. The second direction refers to... Figure 1 The battery pack is shown in the left and right directions. In this embodiment, the first direction is defined, that is, as shown... Figure 1 The battery pack shown has a row of individual cells 102 arranged in the front and rear directions, which is a battery row. The battery module 101 includes cells arranged in the second direction, i.e., as shown... Figure 1 The battery pack shown has five rows of batteries arranged in the left and right directions.

[0048] For ease of description, such as Figure 3 As shown, this embodiment uses a battery pack 100 located on the left side as an example for explanation. By definition, the four battery modules 101 arranged from left to right in the battery pack 100 are, in order, the first module, the second module, the third module, and the fourth module. Specifically, as... Figure 1 As shown, the rear end of the first module is the negative output terminal of the battery pack 100, and the rear end of the fourth module is the positive output terminal of the battery pack 100. Under the action of the series busbar 204, the front end of the first module and the front end of the second module are connected in series, the rear end of the second module and the rear end of the third module are connected in series, and the front end of the third module and the front end of the fourth module are connected in series.

[0049] In this embodiment, the negative electrode busbar 206 electrically connected to the negative output terminal of the first module and the positive electrode busbar 205 electrically connected to the positive output terminal of the fourth module are the high-voltage output terminals of the battery pack 100. Here, the positive electrode busbar 205, negative electrode busbar 206, and series busbar 204 are all located above the connecting busbar 202. The positive electrode busbar 205 and negative electrode busbar 206 are routed at the top of the battery pack 100, allowing direct output from the positive and negative output terminals of the battery pack to the high-voltage connector (not shown in the figure). This arrangement, on the one hand, provides ample space at the top of the battery pack 100, facilitating the routing and layout of the positive electrode busbar 205 and negative electrode busbar 206; on the other hand, it frees up space around the battery pack 100, which is beneficial for improving battery efficiency. The energy density of the battery pack can largely solve the problem of short circuits caused by compression of the high-voltage copper busbars when the battery pack is squeezed. Furthermore, within the same battery pack housing space, the battery pack provided in this embodiment has a larger compression buffer space (specifically, the gap between the battery pack 100 and the inner wall of the housing), resulting in higher safety. Additionally, since the positive electrode 205 and negative electrode 206 are located at the top of the connecting busbar 202 or the battery pack 100, the positive electrode 205 and negative electrode 206 are longitudinally... Figure 1 The battery pack shown can be supported upwards by the connecting bar 202 in the upper and lower directions. In use, the positive electrode bar 205, negative electrode bar 206, series bar 204 and connecting bar 202 are integrally cured by potting glue, which helps to ensure the structural stability of the connection structure between the positive electrode bar 205 and the negative electrode bar 206 and the battery pack 100, and further improves the safety of the battery pack.

[0050] Furthermore, such as Figure 1 and Figure 6 As shown, the bus assembly also includes a first insulating layer 203, which is located between the series bus 204, the positive bus 205, and the negative bus 206, and their respective connecting bus 202. For ease of description, the series bus 204, the positive bus 205, and the negative bus 206 located above the connecting bus 202 are defined as the upper high-voltage bus, while the connecting bus 202 are defined as the lower low-voltage bus. The first insulating layer 203 is used to achieve insulation between the upper high-voltage bus and the lower low-voltage bus, preventing short circuits between them.

[0051] Optionally, the first insulating layer 203 may include, but is not limited to, a PET insulating film or a plastic sheet.

[0052] In this embodiment, preferably, the first insulating layer 203 is a plastic insulating board, and the series busbar 204, positive busbar 205, and negative busbar 206 are all laid on the upper surface of the insulating board. When the first insulating layer 203 is a plastic insulating board, its structural strength is relatively high, which can support the upper high-voltage busbar and facilitate the positioning and installation of the upper high-voltage busbar, namely the series busbar 204, positive busbar 205, and negative busbar 206. At the same time, when foaming adhesive is filled into the box, the plastic insulating board can act as a pressure plate when the foaming adhesive is foaming, which limits the foaming adhesive in the longitudinal upward direction and is conducive to the uniform foaming and diffusion of the foaming adhesive in the lower area of ​​the plastic insulating board, thereby improving the bonding quality of the components.

[0053] The thickness of the first insulating layer 203 is no more than 2 mm. Preferably, the thickness of the first insulating layer 203 is 1.5 mm. This setting ensures that the first insulating layer 203 maintains sufficient strength while effectively controlling its thickness, thus reducing its occupancy of the top space inside the enclosure.

[0054] Furthermore, such as Figure 6 and Figure 7 As shown, a plurality of first injection ports 207 are provided through the first insulating layer 203, and the first injection ports 207 are connected to the gaps between two adjacent single cells 102 arranged along the first direction. Here, the first injection ports 207 facilitate better and more efficient injection of foaming adhesive into the gaps between two adjacent single cells 102, ensuring the bonding quality between the single cells 102.

[0055] In this embodiment, to further improve the safety of the battery pack and enhance the insulation between the upper high-voltage busbar and the lower low-voltage busbar, a third insulating layer is applied to the outer sides of the series busbar 204, the positive electrode busbar 205, and the negative electrode busbar 206; the connection ends of each of the series busbar 204, the positive electrode busbar 205, and the negative electrode busbar 206 are exposed outside the third insulating layer. Optionally, the third insulating layer may include, but is not limited to, a PET insulating film. Thus, under the combined action of the first insulating layer 203 and the third insulating layer, the insulation between the upper high-voltage busbar and the lower low-voltage busbar is effectively guaranteed, effectively preventing short circuits between them.

[0056] In this embodiment, as Figure 6 and Figure 8As shown, the busbar assembly also includes a second insulating layer 201, which is attached to the upper and lower sides of the connecting busbar 202. This second insulating layer 201 is used to fix all connecting busbars 202 corresponding to the same battery module 101, or to fix all connecting busbars 202 corresponding to all battery modules 101. An operation hole 209 is provided on the second insulating layer 201, through which at least a portion of the connecting busbar 202 is exposed to connect to its corresponding individual battery cell 102. In this embodiment, all connecting busbars 202 corresponding to the same battery module 101 constitute one of the aforementioned lower low-voltage busbars. Here, there are a total of eight battery modules 101, corresponding to eight lower low-voltage busbars.

[0057] Optionally, the second insulating layer 201 includes, but is not limited to, a PET insulating film. This second insulating layer 201 can position and fix all the connecting bars 202 corresponding to the same battery module 101 into a single unit, forming a lower low-voltage bar, while also providing insulation to the upper and lower sides of the connecting bars 202. The portion of the connecting bar 202 exposed through the operating hole 209 is used for welding to the positive and negative terminals of its corresponding individual battery cell 102, or to the nickel sheet of the FPC or the nickel sheet of the data acquisition harness.

[0058] In this embodiment, optionally, the thickness of the positive electrode 205 and the negative electrode 206 is no greater than 1 mm. Preferably, the thickness of the positive electrode 205, the negative electrode 206, and the series bus 204 is all 1 mm. Further, the positive electrode 205 and the negative electrode 206 are plate busbars. Optionally, the positive electrode 205 and the negative electrode 206 are aluminum plate busbars or copper plate busbars. Preferably, the positive electrode 205, the negative electrode 206, and the series bus 204 are all made of thin aluminum plates. With this configuration, the upper high-voltage busbar occupies less space in the height direction within the housing, the thin aluminum plate has relatively good heat dissipation effect, high safety, is easy to manufacture, and has low cost.

[0059] In this embodiment, as Figure 2 and Figure 11 As shown, the positive electrode array 205 includes a first body 2054. A first extension 2052 is disposed at the input end of the first body 2054, and a first positive electrode portion 2051 is disposed at the end of the first extension 2052. The first positive electrode portion 2051 is connected to the positive terminal of the individual battery 102 at the positive output end of the battery pack 100. In this embodiment, the input end of the first body 2054 is provided with five first extensions 2052 corresponding to five battery columns of the same battery module 101. In this embodiment, the first positive electrode portion 2051 is welded to the positive terminal of its corresponding individual battery 102.

[0060] Furthermore, a first weakening hole 2053 is provided through the first extension 2052. The first weakening hole 2053 can reduce the current-passing area of ​​the first extension 2052. When a short circuit occurs outside or inside the battery pack, this structure melts and acts as a fuse.

[0061] In this embodiment, the negative electrode array 206 includes a second body 2065. A second extension 2062 is configured at the input end of the second body 2065, and a first negative electrode portion 2061 is configured at the end of the second extension 2062. The first negative electrode portion 2061 is connected to the negative terminal of the individual battery 102 at the negative electrode output end of the battery pack 100. In this embodiment, the input end of the second body 2065 is configured with five second extensions 2062 corresponding to five battery columns of the same battery module 101. In this embodiment, the first negative electrode portion 2061 is welded to the negative terminal of its corresponding individual battery 102. Furthermore, a second weakening hole 2063 is provided through the second extension 2062. This second weakening hole 2063 reduces the current-carrying area of ​​the second extension 2062, and when a short circuit occurs externally or internally in the battery pack, this structure melts and acts as a fuse.

[0062] In this embodiment, as Figure 12 As shown, a first clearance notch 2064 is provided on the second extension 2062, which extends and penetrates the first negative electrode portion 2061. The first clearance notch 2064 is used to avoid the positive terminal of the single cell 102 connected to the first negative electrode portion 2061.

[0063] In this embodiment, both the positive electrode array 205 and the negative electrode array 206 are provided with a second glue inlet 208 corresponding to the first glue inlet 207. It should be noted that, vertically, the first glue inlet 207 and its corresponding second glue inlet 208 are directly opposite and connected. That is, the second glue inlet 208 is exposed outside the third insulating layer.

[0064] Optionally, in some embodiments, a second glue inlet 208 is also provided on the series busbar 204. Accordingly, the second glue inlet 208 on the series busbar 204 and its corresponding first glue inlet 207 are opposite to and connected to each other.

[0065] Correspondingly, the connecting busbar 202 is provided with a third injection port 2024 corresponding to the first injection port 207, and the third injection port 2024 is at least partially located within the operating hole 209. The third injection port 2024 and its corresponding first injection port 207 are directly opposite and connected. Specifically, after the busbar assembly of the battery pack is installed, expanding foam is injected through the second injection port 208 and the first injection port 207, and the expanding foam passes through the operating hole 209 and the third injection port 2024 into the gap between two adjacent individual cells 102.

[0066] In this embodiment, as Figure 9 As shown, the connecting row 202 includes five working parts 2028 connected in sequence, corresponding to the five battery columns of the same battery module 101, and two adjacent working parts 2028 are connected by a connecting part 2026.

[0067] The working section 2028 includes a second positive electrode section 2021 and a second negative electrode section 2022 connected to each other. For ease of description, one of the working sections 2028 will be used as an example here. The second positive electrode section 2021 is used to connect to the positive terminal of one of the individual cells 102 in the battery pack, and the second negative electrode section 2022 of the working section 2028 is used to connect to the negative terminal of another individual cell 102 adjacent to the first individual cell 102, thereby connecting two adjacent individual cells 102 in the same battery pack in series.

[0068] In this embodiment, preferably, a second clearance notch 2023 is provided at the end of the second negative electrode portion 2022 away from the second positive electrode portion 2021, which is used to avoid the positive terminal structure of the single cell 102 connected to the second negative electrode portion 2022, so that the second negative electrode portion 2022 can have a larger contact area with the negative terminal of the single cell 102, which is beneficial to improving the welding strength between the two.

[0069] Preferably, the third injection port 2024 is located at the transition connection between the second positive electrode portion 2021 and the second negative electrode portion 2022. Simultaneously, a third weakening hole 2025 is also provided at the transition connection between the second positive electrode portion 2021 and the second negative electrode portion 2022. This third injection port 2024 serves two purposes: firstly, it injects expanding foam; secondly, it acts as the third weakening hole 2025, fulfilling the same fuse function as the first weakening hole 2053 and the second weakening hole 2063, thereby improving the safety of the battery pack.

[0070] In this embodiment, an overflow hole 2027 is provided through the second positive electrode portion 2021. The overflow hole 2027 can allow excess foam to overflow when the foam is foamed vertically upward, which can prevent the foam from lifting the connecting strip 202 and causing the welding structure between the connecting strip 202 and the single cell 102 to fail to a certain extent.

[0071] It should be noted that the first insulating layer 203, the positive electrode row 205, the negative electrode row 206, and the third insulating layer are all perforated with holes corresponding to and communicating with the overflow hole 2027, in order to facilitate the overflow of the expanding foam.

[0072] like Figure 10 , Figure 11 and Figure 12As shown, the negative electrode array 206 includes a third main body 2041, on the same side of which a positive electrode module 2042 and a negative electrode module 2043 are disposed. The positive electrode module 2042 is used to connect to the positive terminal of one of the battery modules 101, and the negative electrode module 2043 is used to connect to the negative terminal of another battery module 101 adjacent to the first battery module 101, so as to connect the two adjacent battery modules 101 in series. In this embodiment, the structure of the positive electrode module 2042 is consistent with the input terminal structure of the first main body 2054 of the positive electrode array 205. Correspondingly, the structure of the negative electrode module 2043 is consistent with the input terminal structure of the second main body 2065 of the negative electrode array 206. Further details are omitted here.

[0073] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A bus assembly, characterized in that, include: A connecting bar (202) is disposed on a battery module (101) for connecting two individual batteries (102) arranged adjacent to each other in a first direction in a first direction, and for connecting two individual batteries (102) arranged adjacent to each other in a second direction in parallel in a second direction. A series bar (204) is laid on the upper side of the connecting bar (202) for connecting two adjacent battery modules (101) to form a battery pack (100); A positive electrode array (205) is connected to the positive output terminal of the battery pack (100), and the positive electrode array (205) is laid on top of the battery pack (100); and A negative electrode array (206) is connected to the negative output terminal of the battery pack (100), and the negative electrode array (206) is laid on the top of the battery pack (100); The positive and negative output terminals of the battery pack (100) are both located on the same side of the battery pack (100). The positive electrode array (205) and the negative electrode array (206) are both located on the upper side of the connecting array (202). The end of the positive electrode array (205) away from the positive output terminal of the battery pack (100) and the end of the negative electrode array (206) away from the negative output terminal of the battery pack (100) are both located on the other side of the battery pack (100).

2. The bus assembly according to claim 1, characterized in that, It also includes a first insulating layer (203) which is located between the series bus (204), the positive bus (205), and the negative bus (206) and their respective corresponding connecting bus (202).

3. The bus assembly according to claim 2, characterized in that, The first insulating layer (203) is a plastic insulating board, and the series bus (204), the positive electrode bus (205) and the negative electrode bus (206) are all laid on the upper surface of the plastic insulating board.

4. The bus assembly according to claim 2 or 3, characterized in that, The thickness of the first insulating layer (203) is no greater than 2 mm.

5. The bus assembly according to claim 2 or 3, characterized in that, A plurality of first injection ports (207) are provided through the first insulating layer (203), and the gaps between the first injection ports (207) and the adjacent two single cells (102) arranged along the first direction are connected.

6. The bus assembly according to claim 1, characterized in that, The busbar assembly further includes a second insulating layer (201), which is attached to the upper and lower sides of the connecting bar (202) to fix all the connecting bars (202) corresponding to the same battery module (101), or to fix all the connecting bars (202) corresponding to all the battery modules (101); An operation hole (209) is provided on the second insulating layer (201), and the connection bar (202) is exposed at least partially through the operation hole (209) to be connected to the corresponding single cell (102).

7. The bus assembly according to claim 1, characterized in that, The thickness of the positive electrode array (205) and the negative electrode array (206) is no greater than 1 mm.

8. The bus assembly according to claim 1 or 7, characterized in that, The positive electrode array (205) and the negative electrode array (206) are plate arrays.

9. The bus assembly according to claim 8, characterized in that, The positive electrode (205) and the negative electrode (206) are aluminum plate electrodes or copper plate electrodes.

10. The bus assembly according to claim 1, characterized in that, The positive electrode array (205) includes a first body (2054), the input end of the first body (2054) is provided with a first extension (2052), the end of the first extension (2052) is provided with a first positive electrode (2051), and the first positive electrode (2051) is connected to the positive terminal of the single cell (102) at the positive electrode output end of the battery pack (100).

11. The bus assembly according to claim 10, characterized in that, A first weakening hole (2053) is provided through the first extension (2052).

12. The bus assembly according to claim 1, characterized in that, The negative electrode array (206) includes a second body (2065), the input end of the second body (2065) is provided with a second extension (2062), the end of the second extension (2062) is provided with a first negative electrode (2061), and the first negative electrode (2061) is connected to the negative terminal of the single cell (102) at the negative electrode output end of the battery pack (100).

13. The bus assembly according to claim 12, characterized in that, A second weakening hole (2063) is provided through the second extension (2062).

14. The bus assembly according to claim 1, characterized in that, The outer sides of the series bus (204), the positive bus (205) and the negative bus (206) are all covered with a third insulating layer; The connection ends of the series bus (204), the positive bus (205), and the negative bus (206) are all exposed on the third insulating layer.

15. The bus assembly according to claim 5, characterized in that, Both the positive electrode array (205) and the negative electrode array (206) are provided with a second glue inlet (208) that is connected to the first glue inlet (207); The connecting bar (202) is provided with a third glue inlet (2024) that is connected to the first glue inlet (207).

16. The bus assembly according to claim 1, characterized in that, The connecting bar (202) is provided with an overflow hole (2027); Both the positive electrode (205) and the negative electrode (206) are provided with hole structures that are connected to the overflow hole (2027).

17. A battery pack, characterized in that, Includes the bus assembly as described in any one of claims 1-16.

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