Integrated busbar with flexible safety flat cable and integrated busbar

Abstract

The utility model discloses an integrated busbar with a flexible safety flat cable and an integrated busbar, the integrated busbar with the flexible safety flat cable comprises the flexible safety flat cable, the flexible safety flat cable comprises an FFC main flat cable and a plurality of FFC branch lines, the first ends of the FFC branch lines are welded on the FFC main flat cable, the second ends of the FFC branch lines are welded on the FFC main flat cable, and the first ends of the FFC branch lines are welded on the FFC main flat cable. At least one of the FFC main flat cable and the FFC branch line is provided with a fuse section; the series bars are arranged at the second ends of the FFC branch lines and are used for connecting the battery monomers; and the plurality of collectors are arranged on the series row, and the collectors are connected with the second ends of the FFC branch lines. In the information acquisition process of the single batteries, current flows to the FFC main flat cable through the FFC branch line, so that the current inevitably passes through the fuse section, the high-power current can be limited through the fuse section, a circuit is fused in advance before a large amount of heat is generated or open fire is generated, a large amount of heat can be effectively prevented from being generated, and the safety of the battery cell is improved.

Description

Technical Field

[0001] This utility model relates to the field of energy storage battery technology, and in particular to an integrated busbar with flexible safety wiring and an integrated busbar. Background Technology

[0002] To improve the automated management, monitoring, and safety of new energy batteries, integrated busbars have become an essential structure. The main structure of a new energy battery consists of an integrated busbar and a battery pack. The battery pack comprises multiple cells arranged in a row. The integrated busbar covers the top of the battery pack, collecting information from each cell and accurately monitoring the internal state of the battery pack.

[0003] The integrated busbar includes flexible flat cables, with branch lines extending from these cables connecting to the battery cells. Data acquisition devices collect information from each cell. These branch lines are typically formed by bending sections of the flexible flat cables. Some data acquisition devices are used to collect temperature data, while others are used to collect voltage data. Within the integrated busbar, some lines experience excessively high output, leading to increased heat generation in the conductors and posing a safety risk. Utility Model Content

[0004] In order to solve the technical problem of safety risks caused by wire overheating in the existing integrated busbar, one of the objectives of this utility model is to provide an integrated busbar with flexible safety wiring.

[0005] One of the objectives of this utility model is achieved through the following technical solution:

[0006] An integrated busbar with flexible safety cabling, the integrated busbar comprising:

[0007] A flexible safety cable includes an FFC main cable and several FFC branch cables, the first end of each FFC branch cable is soldered to the FFC main cable, and at least one of the FFC main cable and the FFC branch cables is provided with a fuse section.

[0008] Several series-connected rows are arranged at the second end of the FFC branch line for connecting individual battery cells;

[0009] Several data collectors are arranged on the serial bus and connected to the second end of the FFC branch line.

[0010] Optionally, the FFC main cable includes two main insulation layers and a plurality of flat main conductors disposed between the two main insulation layers;

[0011] The FFC branch line includes two layers of insulation and at least one flat branch conductor disposed between the two layers of insulation;

[0012] At least one of the flat main conductor and the flat branch conductor is provided with the fuse section.

[0013] Optionally, the width of the fuse section is smaller than that of the non-fuse section.

[0014] Optionally, the fuse section is provided with a hollow structure for reducing the cross-sectional area.

[0015] Optionally, a first welding portion is provided on the flat main guide line, and a first opening is provided on the main insulating layer for exposing the first welding portion;

[0016] The first end of the flat conductor is provided with a second welding part, and the first end of the insulating layer is provided with a second opening for exposing the second welding part.

[0017] Optionally, the second welding part has one or more welding holes.

[0018] Optionally, the plurality of flat main conductors include a main ground line and multiple main acquisition lines, and the flat branch conductors include a branch ground line, each of the branch ground lines being connected to the main ground line.

[0019] Optionally, the main ground line is provided with a plurality of first welding parts, the main acquisition line is provided with a first welding part, and the main insulation layer is provided with a first opening for exposing the first welding part;

[0020] The first end of the flat conductor is provided with a second welding part, and the first end of the insulating layer is provided with a second opening for exposing the second welding part.

[0021] Optionally, the main ground line is located in the middle of the plurality of main acquisition lines.

[0022] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0023] The integrated busbar includes flexible safety cables, several series-connected busbars, and several data acquisition units. The flexible safety cables include FFC main cables and several FFC branch cables. At least one of the FFC main cables and FFC branch cables is equipped with a fuse section. Thus, during the data acquisition process of a battery cell, the current flows from the FFC branch cables to the FFC main cables, inevitably passing through the fuse section. This fuse section can limit the high-power current and melt the circuit before generating a large amount of heat or an open flame, effectively preventing excessive heat generation and improving the safety of the battery cell.

[0024] One of the objectives of this utility model is achieved through the following technical solution:

[0025] An integrated busbar, the integrated busbar comprising:

[0026] The data acquisition cable includes an FFC main cable and several FFC branch cables. The FFC main cable includes several flat main cables. Each FFC branch cable includes at least one flat branch cable. Each of the flat main cables includes one main ground line and multiple main acquisition lines. Each flat branch cable includes one branch ground line. Each branch ground line is connected to the main ground line.

[0027] Several series-connected rows are arranged at the second end of the FFC branch line for connecting individual battery cells;

[0028] Several data collectors are arranged on the serial bus and connected to the second end of the FFC branch line.

[0029] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0030] In a series of flat main lines, one main ground line and multiple main acquisition lines are set up. The flat branch line includes one branch ground line. Each branch ground line is connected to the main ground line. In this way, multiple branch ground lines are connected by one main ground line, which greatly reduces the number of ground lines on the FFC main line and reduces the width of the integrated busbar. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the integrated busbar with flexible safety cable of this utility model;

[0032] Figure 2 This is a top view schematic diagram of the integrated busbar with flexible safety cabling of this utility model;

[0033] Figure 3 This is an exploded view of the FFC branch line and temperature acquisition device in the integrated busbar with flexible safety cabling of this utility model.

[0034] Explanation of reference numerals in the attached diagram:

[0035] 1. Flexible safety cable; 11. FFC main cable; 12. FFC branch cable; 121. Insulation layer; 122. Flat branch conductor; 1221. Solder hole; 13. Fuse section;

[0036] 2. Series busbar;

[0037] 3. Data collector;

[0038] 4. Pallet. Detailed Implementation

[0039] The following will refer to the appendices in the embodiments of this application. Figure 1 To be continued Figure 3The technical solutions in the embodiments of this application are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application. Embodiment 1

[0042] like Figure 1-3 As shown, this utility model embodiment improves an integrated busbar with a flexible safety cable 1. The integrated busbar includes a flexible safety cable 1, several series-connected busbars 2, and several data collectors 3.

[0043] Specifically, the flexible safety cable 1 includes an FFC (Flexible Flat Cable) main cable 11 and several FFC branch cables 12. The first end of each FFC branch cable 12 is soldered to the FFC main cable 11. At least one of the FFC main cable 11 and the FFC branch cables 12 is provided with a fuse section 13. The FFC cable with the fuse section 13 is an FIC (Fuse Inside Cable) cable. Thus, the flexible safety cable 1 includes the FFC main cable 11 and several FIC branch cables, or the flexible safety cable 1 includes the FIC main cable and several FFC branch cables 12, or the flexible safety cable 1 includes the FIC main cable and several FIC branch cables.

[0044] Several series-connected rows 2 are arranged at the second end of the FFC branch line 12 for connecting individual battery cells. Several collectors 3 are arranged on the series-connected rows 2 and connected to the second end of the FFC branch line 12.

[0045] In this embodiment, the integrated busbar includes a flexible safety cable 1, several series busbars 2, and several data collectors 3. The flexible safety cable 1 includes an FFC main cable 11 and several FFC branch lines 12. At least one of the FFC main cable 11 and the FFC branch lines 12 is provided with a fuse section 13. Thus, during the information acquisition process of the battery cell, the current flows from the FFC branch line 12 to the FFC main cable 11, and thus inevitably passes through the fuse section 13. In this way, the high-power current can be limited by the fuse section 13, and the circuit can be melted in advance before a large amount of heat or open flame is generated, which can effectively avoid the occurrence of a large amount of heat generation and improve the safety of the battery cell.

[0046] Furthermore, for the FFC main cable 11 and FFC branch cable 12, the processing technology is the insulation layer hot pressing and melting process. The main structure of the equipment used is a double hot roller. The double roller heats the insulation layer and simultaneously presses the insulation layer and the flat wire together, so that the two insulation layers and the flat wire are connected together by hot melting.

[0047] At least one of the FFC main line 11 and the FFC branch line 12 is provided with a fuse section 13. Specifically, the FFC main line 11 includes two main insulation layers and a plurality of flat main conductors disposed between the two main insulation layers, with the plurality of flat main conductors arranged side by side at intervals. The FFC branch line 12 includes two sub-insulation layers 121 and at least one flat branch conductor 122 disposed between the two sub-insulation layers 121. When there are multiple flat branch conductors 122, the multiple flat branch conductors 122 are arranged side by side at intervals.

[0048] At least one of the flat main conductor and the flat branch conductor 122 is provided with a fuse section 13, that is, the flat main conductor is provided with a fuse section 13, or the flat branch conductor 122 is provided with a fuse section 13, or both the flat main conductor and the flat branch conductor 122 are provided with fuse sections 13.

[0049] In some embodiments of fuse section 13, such as Figure 3 As shown, the width of the fuse section 13 is smaller than that of the non-fuse section. Alternatively, the fuse section 13 may have a perforated structure to reduce its cross-sectional area; this perforated structure can specifically be a hole, opening, or groove.

[0050] In some connection methods of FFC main cable 11 and FFC branch cable 12, a first solder joint is provided on the flat main cable, and a first opening is provided on the main insulation layer to expose the first solder joint. A second solder joint is provided at the first end of the flat branch cable 122, and a second opening is provided at the first end of the branch insulation layer 121 to expose the second solder joint.

[0051] The first opening exposes the first welding part, and the second opening exposes the second welding part. When connecting, the first end of the FFC branch line 12 is connected to the FFC main line 11, that is, the second welding part of the first end of the flat branch line 122 is welded to the flat main line which has the first welding part.

[0052] The first weld portion specifically refers to a region or section used for welding, particularly the region or section exposed by the first opening. For example... Figure 3 As shown, the second welding part has one or more welding holes 1221. When welding the second welding part to the first welding part, welding can be performed through the welding holes 1221. For example, when performing ultrasonic or laser welding, the side wall of the welding hole 1221 can be directly heated to achieve welding at the welding hole 1221, forming a good avoidance effect.

[0053] In some grounding embodiments, several flat main conductors include one main ground wire and multiple main acquisition lines, and flat branch conductors 122 include one branch ground wire, with each branch ground wire connected to the main ground wire. A single main ground wire connects to multiple branch ground wires simultaneously, reducing the number of main ground wires required for the FFC main cabling 11 to only one, significantly reducing the number of flat main conductors in the FFC main cabling 11 and thus reducing the width of the FFC main cabling 11.

[0054] Furthermore, the main grounding wire has multiple first welding points, and the main acquisition wire has one first welding point. The main insulation layer has a first opening for exposing the first welding points. The first welding points on each main acquisition wire are located in different positions, or the first welding points on each main acquisition wire are staggered. The first end of the flat branch conductor 122 has a second welding point, and the first end of the branch insulation layer 121 has a second opening for exposing the second welding point. The multiple first welding points on the main grounding wire allow multiple branch grounding wires to be simultaneously welded to the main grounding wire.

[0055] Preferably, the main ground line is located in the middle of the multiple main acquisition lines.

[0056] In some embodiments of integrated busbars, such as Figure 1 As shown, the integrated busbar also includes a tray 4, which has multiple first openings corresponding to the electrodes of the battery cells. A series busbar 2 is fixed to the tray 4, and the electrodes of two adjacent battery cells are welded to both ends of the series busbar 2.

[0057] Specifically, tray 4 is flat, which gives it a minimalist structure, reducing its production cost and thus the overall cost of the integrated busbar.

[0058] For the series bus 2 placed on the tray 4, both ends of the series bus 2 are provided with welding holes 1221 and connection holes. The series bus 2 is welded to the electrode of the battery cell at the welding holes 1221, and the series bus 2 is fixedly connected to the tray 4 at the connection holes.

[0059] Of course, to improve assembly convenience, tray 4 is equipped with two rows of positioning slots. The two rows of connecting bars are placed in the two rows of positioning slots respectively. Through the positioning slots, the series busbar 2 and the output electrode can be accurately positioned during assembly, thus speeding up production efficiency.

[0060] When assembling the series busbar 2, adhesive can be applied to the connecting holes to glue the series busbar 2 into the positioning groove. Alternatively, positioning posts can be installed on the tray 4, with the upper end of the positioning post protruding from the series busbar 2, and the series busbar 2 can be fixed into the positioning groove by heat fusion positioning post.

[0061] Example 2

[0062] In this embodiment, an integrated busbar is provided, which includes a data acquisition cable, several series-connected busbars 2 and several data acquisition devices 3.

[0063] Compared to Embodiment 1, the difference lies in that the data acquisition cable includes an FFC main cable 11 and several FFC branch cables 12. The FFC main cable 11 includes several flat main conductors, and each FFC branch cable 12 includes at least one flat branch conductor 122. Each flat main conductor includes a main ground wire and multiple main acquisition lines. Each flat branch conductor 122 includes a branch ground wire, and each branch ground wire is connected to the main ground wire. A series busbar 2 is located at the second end of the FFC branch cable 12 and is used to connect individual battery cells. The data acquisition device 3 is located on the series busbar 2 and is connected to the second end of the FFC branch cable 12.

[0064] In some data acquisition devices 3, such as temperature data acquisition devices, there are multiple contacts. The connected FFC branch line 12 includes three flat branch wires 122, of which at least one is a ground wire. Thus, when there are multiple data acquisition devices 3 with multiple temperatures, the integrated busbar needs to be set with multiple corresponding ground wires, which makes the number of wires required for the integrated busbar large and causes the integrated busbar to be too wide.

[0065] In this invention, a main ground wire and multiple main acquisition wires are set among several flat main conductors. The flat branch conductor 122 includes a branch ground wire, and each branch ground wire is connected to the main ground wire. In this way, multiple branch ground wires are connected to one main ground wire at the same time, which greatly reduces the number of ground wires on the FFC main busbar 11 and reduces the width of the integrated busbar.

[0066] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. An integrated busbar with flexible safety wiring, characterized in that, The integrated busbar includes: A flexible safety cable includes an FFC main cable and several FFC branch cables, the first end of each FFC branch cable is soldered to the FFC main cable, and at least one of the FFC main cable and the FFC branch cables is provided with a fuse section. Several series-connected rows are arranged at the second end of the FFC branch line for connecting individual battery cells; Several data collectors are arranged on the serial bus and connected to the second end of the FFC branch line.

2. The integrated busbar with flexible safety cabling as described in claim 1, characterized in that, The FFC main cable includes two main insulation layers and several flat main conductors disposed between the two main insulation layers; The FFC branch line includes two layers of insulation and at least one flat branch conductor disposed between the two layers of insulation; At least one of the flat main conductor and the flat branch conductor is provided with the fuse section.

3. The integrated busbar with flexible safety cabling as described in claim 2, characterized in that, The width of the fuse section is smaller than that of the non-fuse section.

4. The integrated busbar with flexible safety cabling as described in claim 2, characterized in that, The fuse section has a hollow structure for reducing the cross-sectional area.

5. The integrated busbar with flexible safety cabling as described in claim 2, characterized in that, A first welding portion is provided on the flat main guide line, and a first opening is provided on the main insulating layer to expose the first welding portion; The first end of the flat conductor is provided with a second welding part, and the first end of the insulating layer is provided with a second opening for exposing the second welding part.

6. The integrated busbar with flexible safety cabling as described in claim 5, characterized in that, The second welding part has one or more welding holes.

7. The integrated busbar with flexible safety cabling as described in claim 2, characterized in that, The flat main conductor includes a main ground line and multiple main acquisition lines, and the flat branch conductor includes a branch ground line, with each branch ground line connected to the main ground line.

8. The integrated busbar with flexible safety cabling as described in claim 7, characterized in that, The main ground line is provided with multiple first welding parts, the main acquisition line is provided with one first welding part, and the main insulation layer is provided with a first opening for exposing the first welding part; The first end of the flat conductor is provided with a second welding part, and the first end of the insulating layer is provided with a second opening for exposing the second welding part.

9. The integrated busbar with flexible safety cabling as described in claim 7, characterized in that, The main ground line is located in the middle of the multiple main acquisition lines.

10. An integrated busbar, characterized in that, The integrated busbar includes: The data acquisition cable includes an FFC main cable and several FFC branch cables. The FFC main cable includes several flat main cables. Each FFC branch cable includes at least one flat branch cable. Each of the flat main cables includes one main ground line and multiple main acquisition lines. Each flat branch cable includes one branch ground line. Each branch ground line is connected to the main ground line. Several series-connected rows are arranged at the second end of the FFC branch line for connecting individual battery cells; Several data collectors are arranged on the serial bus and connected to the second end of the FFC branch line.

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