An integrated busbar and battery module

Abstract

The present invention provides an integrated busbar and a battery module, wherein the integrated busbar is arranged on a plurality of battery cell groups and is electrically connected to the tabs of the battery cell groups, and comprises: a signal acquisition component, comprising a printed circuit board and a plurality of current-passing plates, wherein the current-passing plates are arranged on the sides of the printed circuit board, and the printed circuit board is provided with a plurality of open slots distributed in an array; a conductive plate corresponding to the current-passing plates, wherein a plurality of through holes are arranged on the conductive plate, and the conductive plate cover is arranged on the printed circuit board and the current-passing plates, and the plurality of tabs sequentially pass through the open slots and the through holes corresponding to the tabs, and are electrically connected to the conductive plate. The integrated busbar of the present invention can ensure excessive current and reduce the cumulative tolerance after installation, and is suitable for high-capacity, high-current battery modules.

Description

Technical Field

[0001] The present invention relates to the technical field of power batteries, and in particular to an integrated busbar and battery module. Background Art

[0002] In existing soft-pack battery modules, integrated busbars using printed circuit boards (PCBs) are often used in drones or home storage industries. Compared with more complex solutions such as using flexible printed circuits (FPCs) or wiring harnesses to collect signals, using PCBs is simple.

[0003] The new energy vehicle industry generally requires high-capacity, high-current battery packs. However, when integrating high-current soft-pack modules, multiple cells need to be integrated. At this time, the existing integrated busbars using PCB boards generally cannot pass large currents, and the cumulative tolerances of the components after assembly are large, which makes them unsuitable for high-current soft-pack battery modules.

[0004] Therefore, it is necessary to provide an integrated busbar and battery module to solve the above problems existing in the prior art. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an integrated busbar and battery module to solve the technical problem that the prior art is not applicable to large current soft-pack battery modules.

[0006] In order to solve the above technical problems, the present invention provides an integrated busbar, which is arranged on a plurality of battery cell groups and electrically connected to the tabs of the battery cell groups, comprising:

[0007] The signal acquisition component includes a printed circuit board and a plurality of current-passing plates, wherein the current-passing plates are arranged on the sides of the printed circuit board, and the printed circuit board is provided with open slots distributed in an array;

[0008] A conductive plate corresponding to the current plate has a plurality of through holes formed thereon, the conductive plate cover is disposed on the printed circuit board and the current plate, the pole ears sequentially pass through the opening grooves and the through holes corresponding to the pole ears, and are electrically connected to the conductive plate.

[0009] The integrated busbar provided by the present invention has the following beneficial effects:

[0010] By designing an overcurrent plate on the side of the printed circuit board, and connecting the overcurrent plate to the conductive plate, the current first passes through the conductive plate and then through the overcurrent plate. The overcurrent plate switches the current, thereby increasing the overcurrent cross-sectional area and greatly improving the overcurrent capacity of the integrated busbar. In addition, while ensuring the overcurrent through the overcurrent plate, there is no need to increase the width of the battery module, thereby improving the space utilization of the battery module. At the same time, an array of open slots are provided on the printed circuit board, so that multiple vertical pole ears can be more easily exposed in the corresponding open slots at the same time, and the pole ears are bent after passing through the through holes of the conductive plate to be electrically connected to the conductive plate. While realizing the series and parallel connection of the battery cells, the cumulative tolerance of the pole ears and the integrated busbar after installation is greatly reduced, ensuring the feasibility of the integrated busbar installation, and being suitable for battery modules with high capacity and high current requirements.

[0011] Furthermore, the current plate includes a flat plate and a bent plate, and the flat plate and the bent plate are arranged side by side on the side of the printed circuit board along the length direction of the printed circuit board. The beneficial effect is that the flat plate and the bent plate are designed at the same time, and the overall space design of the battery module is reasonably arranged, which effectively increases the cross-sectional area of ​​the current flow and improves the current flow capacity.

[0012] Furthermore, the conductive plate includes a first connecting plate corresponding to the flat plate, the first connecting plate includes a first lifting member, and the first lifting member is connected to the flat plate. The beneficial effect is that by designing the first connecting plate corresponding to the flat plate and the first lifting member, not only the current capacity is ensured after the first connecting plate and the flat plate are connected, but also the overall structure of the integrated busbar is reasonably arranged.

[0013] Furthermore, the bending plate includes a horizontal plate and a vertical plate, and one side of the vertical plate is connected to a side of the horizontal plate away from the opening slot. The beneficial effect is that the vertical plate transfers the current through the connection between the horizontal plate and the conductive plate, thereby increasing the current cross-sectional area and thus improving the current capacity.

[0014] Furthermore, the conductive plate further includes a second connecting plate corresponding to the bending plate, the second connecting plate includes a second lifting member, and the second lifting member is connected to the transverse plate.

[0015] Furthermore, it also includes foam, which is arranged along the length direction of the printed circuit board and is located between the two opening grooves. The beneficial effect is that by designing the foam between the two opening grooves along the length direction of the printed circuit board, the creepage distance can be increased, thereby ensuring that the battery module operates in a safe and stable environment.

[0016] Furthermore, it also includes an aluminum bar, which is riveted to the two first connecting plates respectively. Its beneficial effect is that the aluminum bar is connected to the first connecting plate by riveting, which is convenient to operate and can quickly complete the connection process, thereby improving efficiency.

[0017] In order to solve the above technical problems, the present invention further provides a battery module, comprising:

[0018] An integrated busbar as described above;

[0019] There are multiple cell groups, the integrated busbar is arranged on the multiple cell groups, and the tabs of the cell groups pass through the opening grooves and the through holes corresponding to the tabs in sequence, and are connected to the conductive plate.

[0020] The beneficial effects of the battery module provided by the present invention can be found in the description of the above-mentioned integrated busbar.

[0021] Furthermore, the plurality of cell groups extend along the length direction of the printed circuit board, the tabs of each cell group include a positive tab and a negative tab, the polarities of the tabs in the same row of two adjacent cell groups are opposite, the opening grooves corresponding to each cell group are distributed in two rows and one column, and the positive tab and the negative tab pass through the opening grooves and the through holes in turn and are connected in parallel to the conductive plate.

[0022] Furthermore, the conductive plate includes a first connecting plate and a second connecting plate, and the total positive tabs or the total negative tabs of the battery cell group corresponding to the end of the printed circuit board are connected in parallel through the first connecting plate; the adjacent positive tabs and the negative tabs in the same row as the total positive tabs or the total negative tabs are connected in series and parallel through the second connecting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is a schematic structural diagram of an integrated busbar according to an embodiment of the present invention;

[0024] Figure 2 Shown is a schematic diagram of the structure of a signal acquisition component according to an embodiment of the present invention;

[0025] Figure 3 Shown is a schematic structural diagram of a first connecting plate according to an embodiment of the present invention;

[0026] Figure 4 It is a schematic structural diagram of a second connecting plate according to an embodiment of the present invention;

[0027] Figure 5-Figure 6 Shown is a schematic structural diagram of a battery module according to an embodiment of the present invention;

[0028] Figure 7-Figure 8It is a partial structural schematic diagram of a battery module according to an embodiment of the present invention;

[0029] Fig. 9 Display as Figure 8 A magnified schematic diagram of part A;

[0030] Fig.10 Display as Fig. 9 Schematic diagram of the enlarged portion B.

[0031] Component number description

[0032] 1. Signal acquisition component; 11. Printed circuit board; 12. Current plate; 121. Flat plate; 122. Bending plate; 122a. Horizontal plate; 122b. Vertical plate; 13. Connector; 2. Conductive plate; 21. First connecting plate; 211. First lifting piece; 212. First connecting plate body; 213. First through hole; 214. Rivet column; 22. Second connecting plate; 221. Second lifting piece; 222. Second connecting plate body; 223. Second through hole; 3. Foam; 4. Aluminum bar; 41. Total positive aluminum bar; 42. Total negative aluminum bar; 10. Integrated busbar; 20. Cell group; 201. Pole ear; 201a. Positive pole ear; 201b. Negative pole ear; 30. Cover plate; 40. End plate; 50. Steel strip. DETAILED DESCRIPTION

[0033] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0034] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification, so that people familiar with this technology can understand and read them, and are not used to limit the limiting conditions that the present invention can implement, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope of the technical content disclosed by the present invention. The following detailed description should not be considered restrictive, and the scope of the embodiments of the present application is limited only by the claims of the published patents. The terms used here are only for describing specific embodiments and are not intended to limit the present application. Spatially related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., can be used in the text to facilitate the description of the relationship between an element or feature shown in the figure and another element or feature.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "hold" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless there is an indication to the contrary in the context. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Therefore, "A, B or C" or "A, B and / or C" means "any of the following: A; B; C; A and B; A and C; B and C; A, B and C". Exceptions to this definition will only occur when the combination of elements, functions or operations is inherently mutually exclusive in some way.

[0037] The existing integrated busbar (Cells Contact System, CCS) is mainly composed of signal acquisition components (FPC, PCB, FFC, etc.), plastic structural parts, copper and aluminum busbars, etc., which are connected into a whole through processes such as hot pressing or riveting to realize the high-voltage series and parallel connection of battery cells, as well as the temperature sampling and battery cell voltage sampling functions of the battery. The temperature and voltage are provided to the battery management system (Battery Management System, BMS) through the FPC / PCB and connector components, which is part of the BMS system. Since the battery body of the existing soft-pack module is narrow and the tabs are generally wide, the design space range of the integrated busbar is very small, and the cross-sectional area of ​​the integrated busbar is limited, resulting in the inability to achieve excessive current. At the same time, the integrated busbar of the PCB board is used, a layer of copper plate is bonded to the PCB board, and a through hole is opened on the copper plate to allow the tab to pass through. However, when the soft-pack battery module is designed to have high capacity and high current, it means that the number of soft-pack batteries will also increase, and more through holes need to be opened on a copper plate to accommodate the tabs to pass through. In this way, the cumulative tolerance of the tabs and through-hole installation of high-capacity, high-current soft-pack modules will become very large. When the cumulative tolerance reaches a certain level, it will affect the performance and quality of the soft-pack module, not meet the design requirements of the soft-pack module, and exceed the cumulative tolerance range after assembly. Therefore, the present application provides an integrated busbar and battery module, which reduces the cumulative tolerance while ensuring that it can pass large currents, meeting the design requirements of high-capacity, high-current battery modules. It should be understood that the cumulative tolerance refers to the total tolerance of the tolerances generated by each part when the parts are assembled together.

[0038] like Figure 1-Figure 10 As shown, an embodiment of the present invention provides an integrated busbar 10, which is arranged on a plurality of battery cell groups 20 and electrically connected to the tabs 201 of the battery cell groups 20. The integrated busbar 10 includes: a signal acquisition component 1 and a conductive plate 2. The signal acquisition component 1 is used to collect temperature signals and voltage signals of the battery cells. The conductive plate 2 is used to connect the battery cells in series and parallel. The signal acquisition component 1 includes a printed circuit board 11 and a plurality of current plates 12. The current plates 12 are arranged on the sides of the printed circuit board 11. A plurality of open slots 111 distributed in an array are provided on the printed circuit board 11. The conductive plate 2 corresponds to the current plates 12. A plurality of through holes are provided on the conductive plate 2. The conductive plate 2 is covered on the printed circuit board 11 and the current plates 12. The tabs 201 pass through the open slots 111 and the through holes corresponding to the tabs 201 in sequence, and are electrically connected to the conductive plate 2. Specifically, the tabs 201 pass through the opening slots 111 and the through holes in sequence, are bent, and are welded to the conductive plate 2 , thereby realizing the series-parallel connection of the battery cells.

[0039] By designing a current-passing plate 12 on the side of the printed circuit board 11, and the current-passing plate 12 is connected to the conductive plate 2, the current first passes through the conductive plate 2, and then passes through the current-passing plate 12. The current transfer by the current-passing plate 12 increases the current cross-sectional area, greatly improves the current-passing capacity of the integrated busbar 10, and while the current-passing plate 12 ensures the current, there is no need to increase the width of the battery module, thereby improving the space utilization of the battery module; at the same time, by providing a plurality of open slots 111 distributed in an array on the printed circuit board 11, a plurality of vertical pole ears 201 can be more easily exposed from the open slots 111 at the same time, and the pole ears 201 are bent after passing through the through holes of the conductive plate 2 and connected to the conductive plate 2. While realizing the series and parallel connection of the battery cells, the cumulative tolerance of the pole ears 201 and the integrated busbar 10 after installation is greatly reduced, ensuring the feasibility of the installation of the integrated busbar 10 assembly, and can be suitable for high-capacity, high-current battery modules.

[0040] like Figure 1 and Figure 2 As shown, in some embodiments of the present invention, the current plate 12 includes a flat plate 121 and a bent plate 122. The flat plate 121 and the bent plate 122 are arranged side by side on the side of the printed circuit board 11 along the length direction of the printed circuit board 11. The bent plate 122 in this embodiment can realize the transfer of current, increase the cross-sectional area of ​​the current flow, greatly improve the current flow capacity, and do not increase the module width under the premise of ensuring the current flow capacity, thereby ensuring the space utilization rate of the module. Specifically, the flat plate 121 and the bent plate 122 are bonded to the side of the printed circuit board 11 by glue. Exemplarily, a flat plate 121 and three bent plates 122 are respectively installed on both sides of the printed circuit board 11, that is, there are two flat plates 121 and six bent plates 122 in total. Exemplarily, the material of the flat plate 121 and the bent plate 122 is copper.

[0041] like Figure 2 As shown, in some embodiments of the present invention, the bending plate 122 includes a horizontal plate 122a and a vertical plate 122b. One side of the vertical plate 122b is connected to the side of the horizontal plate 122a away from the opening groove 111. That is, the horizontal plate 122a and the vertical plate 122b are connected together to form an "L" shape. With such a design, without occupying too much horizontal design space of the integrated busbar 10, the horizontal plate 122a is connected to the conductive plate 2, and the current transfer by the horizontal plate 122a and the vertical plate 122b greatly improves the current flow capacity. Specifically, the conductive plate 2 is welded to the flat plate 121 and the horizontal plate 122a. It should be noted that the horizontal plate 122a and the vertical plate 122b can be either an integrated structure or a split structure, which is not specifically limited here.

[0042] like Figure 1As shown, in some embodiments of the present invention, the conductive plate 2 includes a first connecting plate 21 and a second connecting plate 22. The first connecting plate 21 corresponds to the flat plate 121, that is, the number and structure of the first connecting plate 21 and the flat plate 121 are matched and connected. Exemplarily, the number of first connecting plates 21 corresponding to the two flat plates 121 is also two. The second connecting plate 22 corresponds to the bending plate 122, that is, the number and structure of the second connecting plate 22 and the bending plate 122 are matched and connected. Exemplarily, the number of second connecting plates 22 corresponding to six bending plates 122 is also six. The first connecting plate 21 and the second connecting plate 22 are both provided with corresponding through holes, for the corresponding pole ears 201 to pass through and then bend and weld to the first connecting plate 21 and the second connecting plate 22, so as to realize the series and parallel connection of the battery cells. Exemplarily, the material of the first connecting plate 21 and the second connecting plate 22 is copper. Furthermore, the flat plate 121 is located on one side of an opening slot 111 , and the bent plate 122 is located on one side of two opening slots 111 . Accordingly, the first connecting plate 21 corresponds to one opening slot 111 , and the second connecting plate 22 corresponds to two opening slots 111 .

[0043] like Figure 1 and Figure 3 As shown and combined with reference Figure 7 and Fig. 9 In some embodiments of the present invention, the first connecting plate 21 includes a first lifting member 211. The first lifting member 211 is connected to the flat plate 121. Specifically, the first lifting member 211 is welded to the flat plate 121. When the first connecting plate 21 is covered on the printed circuit board 11, since the flat plate 121 is designed on the side of the printed circuit board 11 and presents a convex state, the first lifting member 211 needs to be designed at the corresponding position of the flat plate 121 and overlapped with the flat plate 121, so that the first lifting member 211 can be welded to the flat plate 121 without obstacles, meeting the space design requirements.

[0044] The first connecting plate 21 also includes a first connecting plate body 212, a first through hole 213 and a rivet column 214. The first lifting member 211 is arranged on the side of the first connecting plate body 212. The first through hole 213 is designed so that the pole ear 201 that exposes the corresponding opening groove 111 passes through the first through hole 213 and is bent, so as to be welded to the first connecting plate body 212 to achieve parallel connection of the battery cells. Further, the number of pole ears 201 welded to the first connecting plate 21 is N, N is a positive integer and N≥2, then the number of corresponding first through holes 213 is M, then M=N-2. Exemplarily, the number of pole ears 201 welded to the first connecting plate body 212 is ten, then the corresponding number of first through holes 213 is eight, that is, the two pole ears 201 located at both ends pass through the two sides of the first connecting plate body 212 and are bent.

[0045] like Figure 1 and Figure 3 As shown, in some embodiments of the present invention, the integrated busbar 10 further includes an aluminum bar 4. The aluminum bar 4 is riveted to the two first connecting plates 21 respectively. Specifically, a rivet column 214 is provided on the first connecting plate body 212, and a hole adapted to the rivet column 214 is provided on the aluminum bar 4. The rivet column 214 is inserted into the hole and tightened by a nut, thereby fixing the aluminum bar 4 to the first connecting plate body 212. The aluminum bar 4 includes a total positive aluminum bar 41 and a total negative aluminum bar 42. The total positive aluminum bar 41 is riveted to one first connecting plate 21, and the total negative aluminum bar 42 is riveted to the other first connecting plate 21, so as to respectively realize the input and output of the total positive and negative current voltages.

[0046] like Figure 2 and Figure 4 As shown and combined with reference Figure 7 In some embodiments of the present invention, the second connecting plate 22 includes a second lifting member 221. The second lifting member 221 is connected to the horizontal plate 122a. Specifically, the second lifting member 221 is welded to the horizontal plate 122a. The purpose of designing the second lifting member 221 is similar to the purpose of designing the first lifting member 211. Please refer to the description of the first lifting member 211 above, which will not be repeated here.

[0047] The second connecting plate 22 also includes a second connecting plate body 222 and a second through hole 223. The second lifting member 221 is arranged on the side of the second connecting plate body 222. The second through hole 223 is designed so that the pole ear 201 that exposes the corresponding opening groove 111 passes through the second through hole 223 and is bent, so as to be welded to the second connecting plate body 222, so as to realize the parallel connection and then the series connection of the battery cell. Furthermore, the number of pole ears 201 welded to the second connecting plate 22 is X, X is a positive integer and X≥2, then the number of corresponding second through holes 223 is Y, and Y=X-2. Exemplarily, the number of pole ears 201 welded to the second connecting plate body 222 is twenty, then the corresponding number of second through holes 223 is eighteen, that is, the two pole ears 201 located at the two ends are respectively bent through the two sides of the second connecting plate body 222.

[0048] By opening an open groove 111 on the printed circuit board 11, during installation and assembly, multiple vertical pole ears 201 can easily pass through the printed circuit board 11 at the same time, and the conductive plate 2 is designed to be arranged in blocks, that is, it is divided into a combination of multiple first connecting plates 21 and second connecting plates 22. The number of parallel and series battery cell pole ears of each first connecting plate 21 and second connecting plate 22 is limited. Compared with the prior art that hundreds of pole ears need to be connected on a copper plate at the same time, there will be hundreds of cumulative tolerances. The present application greatly reduces the cumulative tolerance during installation, so that the feasibility of installing the integrated busbar 10 assembly is guaranteed.

[0049] like Figure 1 and Fig.10 As shown, in some embodiments of the present invention, the integrated busbar 10 further includes foam 3. The foam 3 is arranged along the length direction of the printed circuit board 11 and is located between the two open grooves 111. That is, the foam 3 is arranged in the middle position of the printed circuit board 11 along the length direction of the printed circuit board 11. Specifically, the foam 3 is a silicone foam. Exemplarily, the silicone foam is bonded to the printed circuit board 11 by glue. In a large current soft pack battery module, silicone foam is designed between the two open grooves 111 along the length direction of the printed circuit board 11, that is, silicone foam is designed between the first connecting plate 21 and the second connecting plate 22, and between the second connecting plate 22 and the second connecting plate 22 in the length direction of the printed circuit board 11, which can increase the creepage distance, that is, the shortest path length between two conductive parts measured along the insulating surface, thereby effectively preventing arc discharge or breakdown in a high voltage environment, improving insulation performance, and ensuring the safe operation of the battery module. It should be understood that, since silicone foam is a highly insulating material, its excellent insulating properties can effectively prevent current leakage along its surface, thereby providing the necessary isolation between two conductive components.

[0050] like Figure 1 As shown, in some embodiments of the present invention, the signal acquisition component 1 also includes a connector 13, a temperature sensor and a voltage sensor. The connector 13 is electrically connected to the printed circuit board 11. Specifically, the connector 13 is bonded to the printed circuit board 11 by glue. The temperature sensor is arranged on the printed circuit board 11, and is used to collect the temperature signal of the battery cell. The voltage sensor is arranged at the bottom of the current plate 12, and is used to collect the voltage signal of the battery cell. That is, voltage sensors are provided at the bottom of the flat plate 121 and the bending plate 122. The temperature signal collected by the temperature sensor and the voltage signal collected by the voltage sensor are transmitted to the battery management system through the connector 13, and the temperature and voltage of the battery cell are monitored, thereby ensuring the safe and stable operation of the battery module.

[0051] The signal acquisition component 1 integrates the flat plate 121, the bending plate 122, the connector 13, the temperature sensor and the voltage sensor on the printed circuit board 11 as an integrated body, which is convenient for subsequent installation.

[0052] like Figure 1-Figure 10 As shown, an embodiment of the present invention further provides a battery module, comprising: the integrated busbar 10 as described above and a plurality of battery cell groups 20. The integrated busbar 10 is arranged on the plurality of battery cell groups 20, and the tabs 201 of the battery cell groups 20 sequentially pass through the opening slots 111 and the through holes corresponding to the tabs 201, and are connected to the conductive plate 2. That is, the tabs 201 are bent after passing through the opening slots 111 and the through holes in sequence, and are welded to the conductive plate 2, thereby realizing the series and parallel connection of the battery cells.

[0053] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the battery module further includes a cover plate 30. The cover plate 30 is covered on the integrated busbar 10. The cover plate 30 can protect the entire exposed circuit assembly and has insulation and withstand voltage. Furthermore, the cover plate 30 is provided with a through hole through which the connector 13 passes, so that the overall design of the battery module is simple and the space layout is reasonably utilized. Specifically, the cover plate 30 is a polycarbonate plate. Due to the excellent flame retardancy, heat resistance and high voltage resistance of the polycarbonate plate, the selection of the polycarbonate plate ensures the safe and stable operation of the battery module.

[0054] like Figure 5 and Figure 6 As shown, in some embodiments of the present invention, the battery module further includes an end plate 40 and a steel belt 50. The two end plates 40 are respectively disposed at both ends of the stacked multiple battery cell groups 20, and the steel belt 50 is disposed around the stacked multiple battery cell groups 20, so as to fix and integrate the shape of the stacked multiple battery cell groups 20. For example, the shape of the stacked multiple battery cell groups 20 is a cube.

[0055] like Figure 7 and Figure 8 As shown and combined with reference Figure 1 In some embodiments of the present invention, a plurality of cell groups 20 extend along the length direction of the printed circuit board 11. That is, a plurality of cell groups 20 are stacked along the length direction of the printed circuit board 11 to form a cube. Each cell group 20, for example, includes a soft-pack cell, and the soft-pack cell includes a pole ear 201, and the pole ear 201 includes a positive pole ear 201a and a negative pole ear 201b. That is, a soft-pack cell includes a positive pole ear 201a and a negative pole ear 201b. The polarities of the pole ears 201 in the same row of two adjacent cell groups 20 are opposite. The opening slots 111 corresponding to each cell group 20 are distributed in two rows and one column, so that the multiple positive pole ears 201a and negative pole ears 201b of the cell group 20 can easily pass through. The positive pole ear 201a and the negative pole ear 201b pass through the opening slots 111 and the through holes in turn and are connected in parallel to the conductive plate 2, thereby realizing the series and parallel connection of the cells. The rows and columns in this embodiment are Figure 7 The rows and columns displayed.

[0056] like Figure 7 and Fig. 9As shown, in some embodiments of the present invention, the conductive plate 2 includes a first connecting plate 21 and a second connecting plate 22. The total positive ears or the total negative ears of the battery cell group 20 corresponding to the end of the printed circuit board 11 are connected in parallel through the first connecting plate 21. The adjacent positive ears 201a and negative ears 201b in the same row as the total positive ears or the total negative ears are connected in series and parallel through the second connecting plate 22, that is, the positive ears 201a and negative ears 201b in the same row as the total positive ears are connected in series and parallel through the second connecting plate 22, and the positive ears 201a and negative ears 201b in the same row as the total negative ears are connected in series and parallel through the second connecting plate 22. This series-parallel mode can avoid the accumulation of tolerances while realizing the series-parallel connection of the battery cells, thereby reducing the accumulated tolerance and ensuring the feasibility of installation.

[0057] Exemplarily, there are seven battery cell groups 20, each of which includes ten soft-pack battery cells, and each of which includes a positive electrode ear 201a and a negative electrode ear 201b, that is, each battery cell group has ten positive electrode ears 201a and ten negative electrode ears 201b. That is, the electrode ears 201 and the opening slots 111 of each battery cell group 20 are distributed in two rows and one column, so as to ensure that the vertical positive electrode ears 201a and negative electrode ears 201b can easily pass through the corresponding opening slots 111. The positive electrode ear 201a corresponding to the total positive aluminum bar 41 is the total positive electrode ear, and the negative electrode ear 201b corresponding to the total negative aluminum bar 42 is the total negative electrode ear. After the total positive electrode ear or the total negative electrode ear passes through an opening slot 111 and the corresponding first through hole 213 of the printed circuit board 11 in turn, it is bent and welded to the first connecting plate 21, so as to realize the parallel connection of the electrode ears 201 of the same polarity. After the two adjacent positive ears 201a and negative ears 201b located in the same row as the total positive ears or the total negative ears pass through the two corresponding opening grooves 111 and the corresponding second through holes 223 in sequence, they are bent and welded to the second connecting plate 22, so as to realize the parallel connection of the battery cells first and then the series connection. In this specific embodiment, the electrode ears 201 first easily pass through the opening grooves 111, then pass through the first through holes 212 of the first connecting plate 21 and the second through holes 223 of the second connecting plate 22, and are bent and welded to the first connecting plate 21 and the second connecting plate 22 respectively, which can not only meet the series and parallel connection of multiple soft-pack battery cells and realize the requirements of high capacity and high current, but also greatly reduce the cumulative tolerance of the integrated busbar 10 after assembly, and ensure the feasibility of the integrated busbar 10.

[0058] During assembly, multiple battery cell groups 20 are stacked, and the tabs 201 in the initial state of stacking are vertical. At this time, the integrated signal acquisition component 1 is placed on the stacked battery cell groups 20. Since fourteen opening slots 111 are provided on the printed circuit board 11, the nine positive tabs 201a and nine negative tabs 201b corresponding to each battery cell group 20 at both ends can easily pass through the corresponding opening slots 111, and the remaining one positive tab 201a and one negative tab 201b pass through the edge of the printed circuit board 11; the ten positive tabs 201a and ten negative tabs 201b corresponding to the battery cell group 20 in the middle can easily pass through the corresponding opening slots 111, so that the integrated signal acquisition component 1 is placed flat on the stacked assembly of multiple battery cell groups 20. This method can greatly reduce the cumulative tolerance of the assembly of each part. Then, when the first connecting plate 21 is placed, the corresponding eight positive electrode ears 201a or eight negative electrode ears 201b pass through the first through holes 213 of the two first connecting plates 21, respectively, and the two positive electrode ears 201a or negative electrode ears 201b at both ends pass through the two sides of the two first connecting plates 21, respectively. That is, the eight positive electrode ears 201a pass through the first through holes 213 of the first connecting plate 21, the two positive electrode ears 201a at both ends pass through the two sides of the first connecting plate 21, and the eight negative electrode ears 201b pass through the other The first through hole 213 of the first connecting plate 21, the two negative pole ears 201b at both ends pass through the two sides of another first connecting plate 21, the first connecting plate body 212 is placed flat on an open groove 111 of the printed circuit board 11, and the first lifting piece 211 is overlapped on the flat plate 121; the ten positive pole ears 201a or negative pole ears 201b are bent and welded to the first connecting plate body 212, and the first lifting piece 211 is welded to the flat plate 121, so as to realize the parallel connection of the soft-pack battery cells. Similarly, when the second connecting plate 22 is placed, the corresponding nine positive tabs 201a and nine negative tabs 201b pass through the second through hole 223, that is, a total of eighteen tabs 201 pass through the second through hole 223, and the two tabs 201 located at the two ends pass through the two sides of the second connecting plate 22. The second connecting plate body 222 is placed flat on the two opening grooves 111 of the printed circuit board 11, and the second lifting member 221 overlaps the horizontal plate 122a of the bending plate 122; these twenty tabs 201 are bent and welded to the second connecting plate body 222, and the second lifting member 221 is welded to the horizontal plate 122a, so as to realize the parallel connection of the battery cells first and then the series connection, and complete the parallel connection and then the series connection of the current. Finally, the total positive aluminum bar 41 and the total negative aluminum bar 42 are respectively locked on the rivet column 214 of the first connecting plate 21 with nuts, so as to fix the aluminum bar 4, so as to realize the input or output of the total positive and negative voltage current.

[0059] In summary, the existing PCB integrated busbars are generally unable to pass large currents, and the installation of PCB boards has limitations, and cannot be applied to high-capacity, high-current soft-pack modules. Therefore, the present invention provides an integrated busbar and a battery module. By designing an overcurrent plate on the side of the printed circuit board, and the overcurrent plate is connected to the conductive plate, the current first passes through the conductive plate, and then passes through the overcurrent plate. The overcurrent plate transfers the current, which increases the overcurrent cross-sectional area, greatly improves the ability of the integrated busbar to pass large currents, and while ensuring the overcurrent through the overcurrent plate, there is no need to increase the width of the battery module, thereby improving the space utilization of the battery module; at the same time, an array of open slots is provided on the printed circuit board, so that multiple vertical pole ears can be more easily exposed in the corresponding open slots at the same time, and the pole ears are bent after passing through the through holes of the conductive plate, and are electrically connected to the conductive plate. While realizing the series and parallel connection of the battery cells, the cumulative tolerance of the pole ears and the integrated busbar after installation is greatly reduced, ensuring the feasibility of the integrated busbar installation, and can be applied to battery modules with high capacity and high current requirements. Therefore, the present invention effectively overcomes various shortcomings in the prior art and has high industrial utilization value.

[0060] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. An integrated busbar, arranged on a plurality of battery cell groups and electrically connected to the tabs of the battery cell groups, characterized in that: include: A signal acquisition component (1) comprises a printed circuit board (11) and a plurality of current-passing plates (12), wherein the current-passing plates (12) are arranged on the sides of the printed circuit board (11), and the printed circuit board (11) is provided with open slots (111) distributed in an array; A conductive plate (2) corresponding to the current plate (12) is provided with a plurality of through holes, the conductive plate (2) is covered on the printed circuit board (11) and the current plate (12), the pole lug (201) passes through the opening groove (111) and the through hole corresponding to the pole lug (201) in sequence, and is electrically connected to the conductive plate (2).

2. The integrated busbar according to claim 1, characterized in that: The current plate (12) comprises a flat plate (121) and a bent plate (122), wherein the flat plate (121) and the bent plate (122) are arranged side by side on the side of the printed circuit board (11) along the length direction of the printed circuit board (11).

3. The integrated busbar according to claim 2, characterized in that: The conductive plate (2) comprises a first connecting plate (21) corresponding to the flat plate (121), the first connecting plate (21) comprises a first lifting member (211), and the first lifting member (211) is connected to the flat plate (121).

4. The integrated busbar according to claim 3, characterized in that: The bent plate (122) comprises a transverse plate (122a) and a vertical plate (122b), and one side edge of the vertical plate (122b) is connected to one side edge of the transverse plate (122a) away from the opening groove (111).

5. The integrated busbar according to claim 4, characterized in that: The conductive plate (2) further comprises a second connecting plate (22) corresponding to the bending plate (122), the second connecting plate (22) comprising a second lifting member (221), and the second lifting member (221) is connected to the transverse plate (122a).

6. The integrated busbar according to claim 5, characterized in that: It also includes foam (3), which is arranged along the length direction of the printed circuit board (11) and is located between pairs of the open grooves (111).

7. The integrated busbar according to claim 3, characterized in that: It also includes an aluminum bar (4), and the aluminum bar (4) is riveted to the two first connecting plates (21) respectively.

8. A battery module, characterized in that: include: The integrated busbar (10) according to any one of claims 1 to 7; A plurality of battery cell groups (20), the integrated busbar (10) being arranged on the plurality of battery cell groups (20), and the pole tabs (201) of the battery cell groups (20) sequentially passing through the opening slots (111) and the through holes corresponding to the pole tabs (201), and being connected to the conductive plates (2).

9. The battery module according to claim 8, characterized in that: A plurality of the battery cell groups (20) extend along the length direction of the printed circuit board (11); the pole lugs (201) of each battery cell group (20) include a positive pole lug (201a) and a negative pole lug (201b); the pole lugs (201) in the same row of two adjacent battery cell groups (20) have opposite polarities; the opening slots (111) corresponding to each battery cell group (20) are arranged in two rows and one column; the positive pole lugs (201a) and the negative pole lugs (201b) sequentially pass through the opening slots (111) and the through holes and are connected in parallel to the conductive plate (2).

10. The battery module according to claim 9, characterized in that: The conductive plate (2) comprises a first connecting plate (21) and a second connecting plate (22); the total positive pole lug or the total negative pole lug of the battery cell group (20) corresponding to the end of the printed circuit board (11) is connected in parallel via the first connecting plate (21); and the adjacent positive pole lug (201a) and the negative pole lug (201b) in the same row as the total positive pole lug or the total negative pole lug are connected in series and in parallel via the second connecting plate (22).

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