Integrated busbar and battery pack

Abstract

An integrated busbar and a battery pack relate to the technical field of battery devices. The integrated busbar comprises a tray, a plurality of series connection pieces and a plurality of bridging connection pieces. The tray is used for covering a plurality of battery modules which are arranged side by side; and a plurality of pole avoiding holes are formed in the tray. And the series connection piece is arranged between the two pole receding holes in a covering manner along the first direction and is used for connecting the battery cells of the same battery module in series. And the bridging connecting piece is arranged between the two pole avoiding holes in a covering manner along the second direction and is used for connecting the battery cells of the adjacent battery modules. The battery pack comprises the integrated busbar and a plurality of battery modules which are arranged side by side along a second direction. The battery module is provided with a plurality of battery cells along a first direction; and the integrated busbar covers the battery module. The integrated busbar of the battery pack can reduce the use of copper bars and reduce the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of battery devices, and more specifically, to an integrated busbar and a battery pack. Background Art

[0002] A battery module is an energy storage component that provides power for electrical equipment and is one of the important components of electrical equipment. The battery module is formed by connecting multiple battery cells in series and fixing the battery cells. Then, multiple battery modules are connected in series and parallel, and a battery management system (BMS), a cooling device, etc. are added to jointly form a complete battery pack. The integrated busbar, also called CCS (Cells Contact System), is a key link for connecting battery cells, achieving high-voltage series and parallel connections, and collecting key data.

[0003] The inventor has found through research that the existing integrated busbar used in the battery pack connects the battery cells in the battery module in series. When connecting in series and parallel between battery modules, the length of the connecting copper bar at the end of the battery module is relatively long, resulting in high costs. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an integrated busbar and a battery pack, which can reduce the use of copper bars and lower costs.

[0005] The embodiments of the utility model are implemented as follows:

[0006] In a first aspect, the utility model provides an integrated busbar, including a tray, a plurality of series connection members, and a plurality of cross-connection members. The tray is used to cover a plurality of juxtaposed battery modules. A plurality of pole post relief holes are provided on the tray. The series connection members are covered between two of the pole post relief holes along a first direction and are used to connect the battery cells of the same battery module in series. The cross-connection members are covered between two of the pole post relief holes along a second direction and are used to connect the battery cells of adjacent battery modules.

[0007] In an optional embodiment, a cross bar is fixedly connected to the tray, and the cross bar is arranged along the second direction.

[0008] In an optional embodiment, the cross bar is used to abut against the cross-connection members.

[0009] In an optional embodiment, a longitudinal bar is further provided on the tray, and the longitudinal bar is arranged along the first direction. The longitudinal bar is used to be clamped between adjacent battery modules.

[0010] In an optional embodiment, a structural adhesive is further connected to the tray, and the structural adhesive is used to fixedly connect the tray and the battery module.

[0011] In a second aspect, the present utility model provides an integrated busbar according to claim 5, wherein the structural adhesive is provided with a relief opening for avoiding the pole columns of the battery module.

[0012] In an alternative embodiment, the number of the trays is multiple, and the multiple trays are arranged in sequence along a first direction and fixedly connected to each other.

[0013] In an alternative embodiment, the series connection member straddles the pole column relief holes of two adjacent trays.

[0014] In a third aspect, the present utility model provides a battery pack, comprising the integrated busbar according to any one of the foregoing embodiments and a plurality of battery modules arranged side by side along a second direction. The battery modules are provided with a plurality of battery cells along the first direction, and the integrated busbar covers the battery modules.

[0015] In an alternative embodiment, the battery modules are fixedly connected by bonding.

[0016] The beneficial effects of the embodiments of the present utility model are as follows:

[0017] The integrated busbar of the present utility model comprises a tray, a plurality of series connection members and a plurality of bridging connection members. The tray is used for covering a plurality of battery modules arranged side by side. A plurality of pole column relief holes are formed in the tray. The series connection members are arranged along the first direction and cover between two pole column relief holes for connecting the battery cells of the same battery module in series. The bridging connection members are arranged along the second direction and cover between two pole column relief holes for connecting the battery cells of adjacent battery modules. By changing the series connection members in the battery module to bridging connection members, there is no need to arrange long copper bars at the ends of the battery modules for connection, reducing the usage amount of copper bars and lowering the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Structural schematic diagram of the integrated busbar provided by the first embodiment of the present utility model;

[0020] Figure 2 Exploded view of the battery pack provided by the second embodiment of the present utility model;

[0021] Figure 3 Structural schematic diagram of the integrated busbar in the prior art;

[0022] Figure 4 The structural schematic diagram of the integrated busbar provided for the first embodiment of the present utility model;

[0023] Figure 5 The first perspective structural schematic diagram of the tray provided for the first embodiment of the present utility model;

[0024] Figure 6 The second perspective structural schematic diagram of the tray provided for the first embodiment of the present utility model.

[0025] Icons: 100 - integrated busbar; 10 - tray; 11 - pole post relief hole; 12 - explosion-proof valve relief hole; 13 - cross bar; 14 - longitudinal bar; 20 - series connection member; 30 - cross-connection member; 40 - structural adhesive; 41 - relief opening; 200 - battery pack; 201 - battery module; 202 - base; 203 - long copper bar. Detailed implementation manners

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0028] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is usually placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, terms such as "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] First Embodiment

[0033] Please refer to Figure 1 and Figure 2 , this embodiment provides an integrated busbar 100, which includes a tray 10, a plurality of series connectors 20 and a plurality of jumper connectors 30. The tray 10 is used to cover a plurality of battery modules 201 arranged side by side. A plurality of pole post relief holes 11 are formed in the tray 10. The series connector 20 is covered between two pole post relief holes 11 along a first direction and is used to connect the battery cells of the same battery module 201 in series. The jumper connector 30 is covered between two pole post relief holes 11 along a second direction and is used to connect the battery cells of adjacent battery modules 201.

[0034] Specifically, Figure 1The x-direction therein represents the first direction, and the y-direction represents the second direction. It can be understood that multiple battery cells in the battery module 201 are arranged along the first direction. Multiple battery modules 201 are arranged along the second direction. A pole column facing the tray 10 is provided on the battery cell, and a pole column relief hole 11 is provided so that the series connection member 20 and the jumper connection member 30 can be electrically connected to the pole column. The series connection member 20 is used to connect adjacent battery cells in the same battery module 201. The jumper connection member 30 is used to connect adjacent battery cells of different battery modules 201.

[0035] Please refer to Figure 3 and Figure 4 , Figure 3 for the electrical connection method of the integrated busbar 100 in the prior art, Figure 4 and for the electrical connection method of the integrated busbar 100 in this embodiment. As Figure 3 shown, after the battery cells of the same battery module 201 are connected in series and then the adjacent battery modules 201 are connected, the distance between the connection points at the end of the battery module 201 is too long, and a long copper bar 203 needs to be provided for connection. And as Figure 4 shown, in this application, part of the series connection member 20 is changed to a jumper connection member 30, and the battery cells of adjacent battery modules 201 can be connected in sequence, so as to reduce the distance between the connection points at the end of the battery module 201, without the need to provide a long copper bar 203, reducing the usage amount of the copper bar and lowering the cost.

[0036] Specifically, in this embodiment, the number of battery modules 201 is three, and the three battery modules 201 are arranged side by side and fixedly connected. The tray 10 simultaneously covers the three battery modules 201. It can be understood that when the battery module 201 vibrates, relative displacement occurs between the battery modules 201, and the battery modules 201 are fixed through the tray 10 to prevent relative movement of the battery modules 201 and avoid breakage of the jumper connection member 30.

[0037] In this embodiment, both the series connection member 20 and the jumper connection member 30 are aluminum busbars.

[0038] Please refer to Figure 2 , the number of trays 10 is multiple. Multiple trays 10 are arranged in sequence along the first direction. Multiple trays 10 are fixedly connected. Specifically, the number of trays 10 in this embodiment is four. The trays 10 are fixed by bonding.

[0039] Furthermore, the series connection member 20 straddles the pole column relief holes 11 of two adjacent trays 10. It can be understood that the tray 10 in this embodiment is provided with three rows of pole column relief holes 11 and covers three rows of battery cells. Part of the series connection members 20 above straddle between two adjacent trays 10.

[0040] Please refer toFigure 1 And Figure 5 On the tray 10, a cross bar 13 is fixedly connected. The cross bar 13 is arranged along the second direction. It can be understood that the cross bar 13 increases the thickness of the tray 10 at some positions, thereby improving the stiffness of the tray 10 in the second direction and preventing the tray 10 from deforming.

[0041] Furthermore, the cross bar 13 is used to abut against the cross-connecting connector 30. It can be understood that the cross bar 13 is preset on the tray 10. When the cross-connecting connector 30 needs to be installed on the tray 10, the cross-connecting connector 30 can be positioned by abutting the cross-connecting connector 30 against the cross bar 13.

[0042] Still further, the length of the cross bar 13 is the same as the length of the cross-connecting connector 30. It can be understood that abutting the cross-connecting connector 30 against the cross bar 13 positions the cross-connecting connector 30 in the first direction; then aligning the cross-connecting connector 30 with the cross bar 13 in the second direction positions the cross-connecting connector 30 in the second direction. The above-mentioned cross bar 13 can accurately position the cross-connecting connector 30 on the tray 10, ensuring stable electrical connection between the cross-connecting connector 30 and the battery cell.

[0043] Please refer to Figure 6 , in this embodiment, the tray 10 is further provided with longitudinal bars 14. The longitudinal bars 14 are arranged along the first direction and are used to be clamped between adjacent battery modules 201. Specifically, there are two longitudinal bars 14. The two longitudinal bars 14 are fixed on the tray 10, dividing the tray 10 into three equal parts, corresponding to the three battery modules 201 below the tray 10 respectively. In other embodiments, the number of longitudinal bars 14 can be set according to the number of battery modules 201. For example, when the number of battery modules 201 is four, that is, the four battery modules 201 are arranged side by side, the number of longitudinal bars 14 is set to three, dividing the tray 10 into four equal parts, corresponding to the four battery modules 201 below the tray 10 respectively. The number of longitudinal bars 14 can also be set to other numbers, and the present invention does not limit the number of longitudinal bars 14.

[0044] It can be understood that the longitudinal bars 14 are used to support the sides of the battery modules 201, so that the battery modules 201 are spaced apart to prevent collision between the battery modules 201.

[0045] Please refer to Figure 2 , the tray 10 is further provided with an explosion-proof valve relief hole 12. The explosion-proof valve relief hole 12 corresponds to the explosion-proof valve on the battery cell. It can be understood that the explosion-proof valve is located between the two pole columns of the battery cell. The explosion-proof valve relief hole 12 is provided to avoid closing the explosion-proof valve and improve safety.

[0046] Further, a structural adhesive 40 is also connected to the tray 10. The structural adhesive 40 is used to fixedly connect the tray 10 and the battery module 201. It can be understood that when fixing the tray 10 above the battery module 201, first apply the structural adhesive 40 on the battery module 201, and then cover the tray 10 on the battery module 201. The structural adhesive 40 is provided with a relief opening 41. The relief opening 41 is used to avoid the pole posts of the battery module 201. It can be understood that when applying the structural adhesive 40, avoid the positions of the pole posts and the explosion-proof valve of the battery module 201, so as to form the relief opening 41.

[0047] Second Embodiment

[0048] Please refer to Figure 2 , this embodiment provides a battery pack 200, which includes the integrated busbar 100 of the above first embodiment and a plurality of battery modules 201 arranged side by side in the second direction. The battery module 201 is provided with a plurality of battery cells in the first direction. The integrated busbar 100 is covered on the battery module 201.

[0049] Specifically, this embodiment includes three battery modules 201. The three battery modules 201 are installed in the base 202.

[0050] Further, the battery modules 201 are fixed by bonding. It can be understood that the bottom of the battery module 201 is fixed by bonding, and the upper part is fixed by the tray 10 of the integrated busbar 100, which improves the stiffness of the battery pack 200 and has strong anti-vibration ability.

[0051] The beneficial effect of the integrated busbar 100 of the battery pack 200 of the present invention is:

[0052] The integrated busbar 100 of the present invention includes a tray 10, a plurality of series connection members 20 and a plurality of cross connection members 30. The tray 10 is used to cover a plurality of battery modules 201 placed side by side. A plurality of pole post relief holes 11 are formed in the tray 10. The series connection members 20 are covered along the first direction between two pole post relief holes 11 for connecting the battery cells of the same battery module 201 in series. The cross connection members 30 are covered along the second direction between two pole post relief holes 11 for connecting the battery cells of adjacent battery modules 201. By changing the series connection members 20 in the battery module 201 to cross connection members 30, there is no need to arrange long copper bars 203 at the ends of the battery module 201 for connection, reducing the usage amount of copper bars and lowering the cost.

[0053] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An integrated busbar, characterized in that: The invention comprises a tray, a plurality of series connectors and a plurality of jumper connectors, wherein the tray is used to cover a plurality of battery modules placed side by side, a plurality of pole clearance holes are provided on the tray, the series connector is covered between two pole clearance holes along a first direction, and is used to connect the battery cells of the same battery module in series, and the jumper connector is covered between two pole clearance holes along a second direction, and is used to connect the battery cells of adjacent battery modules.

2. The integrated busbar according to claim 1, characterized in that: A horizontal bar is fixedly connected to the tray, and the horizontal bar is arranged along the second direction.

3. The integrated busbar according to claim 2, characterized in that: The horizontal bar is used to abut against the bridging connector.

4. The integrated busbar according to claim 1, characterized in that: The tray is also provided with longitudinal bars, which are arranged along a first direction and are used to be sandwiched between adjacent battery modules.

5. The integrated busbar according to claim 1, characterized in that: The tray is also connected with structural adhesive, and the structural adhesive is used to fix the tray and the battery module together.

6. The integrated busbar according to claim 5, characterized in that: The structural adhesive is provided with a clearance opening, and the clearance opening is used to avoid the pole of the battery module.

7. The integrated busbar according to claim 1, characterized in that: There are multiple trays, and the multiple trays are arranged in sequence along the first direction, and the multiple trays are fixedly connected.

8. The integrated busbar according to claim 7, characterized in that: The series connection member is connected across the pole clearance holes of two adjacent trays.

9. A battery pack, characterized in that: It comprises an integrated busbar as described in any one of claims 1 to 8 and a plurality of battery modules arranged side by side along a second direction, wherein the battery module has a plurality of battery cells arranged along a first direction, and the integrated busbar cover is arranged on the battery module.

10. The battery pack according to claim 9, characterized in that: The battery modules are fixed by bonding.

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