CCS sampling device and battery pack

Abstract

The utility model discloses a CCS sampling device and battery pack, the CCS sampling device comprises a connector, a sampling line, a sampling terminal and an aluminum bar busbar, one end of the sampling line is connected with the connector, the other end of the sampling line is divided into a plurality of branch sampling lines, each branch sampling line comprises a plurality of strands of sampling leads, one end of each strand of sampling lead is connected with the connector, and the other end of each strand of sampling lead is connected with the aluminum bar busbar. One end of the sampling wire is connected with the aluminum bar busbar, the other end of the sampling wire is connected with a sampling terminal, the sampling terminal comprises a first conductive terminal and a second conductive terminal, the first conductive terminal is connected with the aluminum bar busbar, and the second conductive terminal comprises a first conductive part connected with the first conductive terminal and a second conductive part connected with the sampling wire; the first conductive part and the second conductive part are connected through a fusing conductor. According to the CCS sampling device, when a short circuit phenomenon occurs on an installation or operation site, the fusing conductor with relatively small current-carrying capacity is fused, so that the sampling lead is protected, the whole CCS sampling device cannot be damaged or a battery pack cannot be scrapped, and the cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of battery pack components technology, specifically to a CCS sampling device and a battery pack. Background Technology

[0002] With the explosive growth of the energy storage and new energy industry, the application of CCS sampling solutions in energy storage and new energy battery pack sampling is a result of the combined effects of technological iteration and market demand in the new energy industry. In the future, as energy storage systems develop towards higher integration and intelligence, CCS solutions will further enhance their application status in battery management systems.

[0003] In related technologies, during the assembly of energy storage production battery packs, the sampling wires are directly locked to the aluminum cell via OT terminals, or the wire harness is crimped onto a nickel sheet and then the nickel sheet is soldered onto the aluminum cell. In practice, the above methods often result in problems such as OT terminals or nickel sheets sticking together or incorrect installation, which can easily cause short circuits in the cells, leading to damage to the entire CCS wiring harness or scrapping of the battery pack. Summary of the Invention

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of this utility model propose a CCS sampling device. When a short circuit occurs at the installation or operation site, the fusible conductor with a small current carrying capacity will melt, thereby protecting the sampling wire and preventing damage to the entire CCS sampling device or the battery pack from being scrapped, thus reducing costs.

[0006] The CCS sampling device of this utility model embodiment includes a connector, a sampling line, a sampling terminal, and an Aluminum Bar bus. One end of the sampling line is connected to the connector, and the other end is divided into multiple branch sampling lines. Each branch sampling line includes multiple sampling wires. One end of each sampling wire is connected to the connector, and the other end is connected to a sampling terminal. The sampling terminal includes a first conductive terminal and a second conductive terminal. The first conductive terminal is connected to the Aluminum Bar bus, and the second conductive terminal includes a first conductive part connected to the first conductive terminal and a second conductive part connected to the sampling wire. The first conductive part and the second conductive part are connected by a fusible conductor.

[0007] The CCS sampling device of this utility model embodiment has a sampling line connected to a connector at one end and divided into multiple branch sampling lines at the other end. Each branch sampling line includes multiple sampling wires. One end of each sampling wire is connected to the connector, and the other end is connected to a sampling terminal. The sampling terminal includes a first conductive terminal and a second conductive terminal. The first conductive terminal is connected to the aluminum busbar, and the second conductive terminal includes a first conductive part connected to the first conductive terminal and a second conductive part connected to the sampling wire. The first conductive part and the second conductive part are connected by a fusible conductor. Therefore, when a short circuit occurs at the installation or operation site, the fusible conductor will melt, thereby protecting the sampling wires and preventing damage to the entire CCS sampling device or the battery pack from being scrapped. Only the damaged second conductive terminal needs to be replaced, reducing costs.

[0008] In some embodiments, the first conductive portion has a snap-fit ​​groove, and the first conductive terminal engages within the snap-fit ​​groove and snaps into the first conductive portion.

[0009] In some embodiments, the first conductive portion includes a base plate, a first side plate, and a second side plate. The first side plate and the second side plate are connected to opposite sides of the base plate to form the snap-fit ​​groove. The first conductive terminal includes a first side surface and a second side surface that are respectively opposite to the first side plate and the second side plate. The first side surface and / or the second side surface are provided with snap-fit ​​protrusions. The first conductive portion is provided with snap-fit ​​holes that are adapted to the snap-fit ​​protrusions.

[0010] In some embodiments, the first conductive terminal is provided with a through hole extending through the first conductive terminal along its thickness direction, and the base plate is provided with a connection hole corresponding to the through hole. The through hole and the connection hole are used for a connector to pass through to connect the first conductive terminal and the base plate.

[0011] In some embodiments, the first side plate and / or the second side plate are bent inward to form a pressing plate that is opposite to and spaced apart from the base plate, the pressing plate being used to press the first conductive terminal.

[0012] In some embodiments, the CCS sampling device further includes a protective sleeve that is fitted over the outer periphery of the sampling terminal.

[0013] In some embodiments, the plurality of branch sampling lines extend in the same direction, and adjacent branch sampling lines are spaced apart to form a clearance zone.

[0014] In some embodiments, each of the sampling wires and the sampling terminal has an extension section extending outward toward the outside of the avoidance area, and a plurality of the extension sections are arranged at intervals along the length direction of the branch sampling line.

[0015] In some embodiments, the fusible conductor is a fuse; and / or the first conductive terminal is a nickel plate terminal; and / or the second conductive terminal is a copper plate terminal.

[0016] The battery pack of this utility model embodiment includes a BMS battery management system and a CCS sampling device as described in the above embodiment, wherein the connector is plugged into the BMS sampling port of the BMS battery management system.

[0017] The battery pack of this utility model embodiment uses the above-mentioned CCS sampling device. One end of the sampling line is connected to a connector, and the other end is divided into multiple branch sampling lines. Each branch sampling line includes multiple sampling wires. One end of each sampling wire is connected to the connector, and the other end is connected to a sampling terminal. The sampling terminal includes a first conductive terminal and a second conductive terminal. The first conductive terminal is connected to the aluminum busbar, and the second conductive terminal includes a first conductive part connected to the first conductive terminal and a second conductive part connected to the sampling wire. The first conductive part and the second conductive part are connected by a fusible conductor. Therefore, when a short circuit occurs at the installation or operation site, the fusible conductor will melt, thereby protecting the sampling wires and preventing damage to the entire CCS sampling device or scrapping of the battery pack. Only the damaged second conductive part needs to be replaced, reducing costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the CCS sampling device according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the second conductive terminal of the CCS sampling device according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the first conductive terminal of the CCS sampling device according to an embodiment of the present invention;

[0021] Figure 4 This is an isometric view of the integral component consisting of the first conductive terminal and the second conductive terminal of the CCS sampling device according to an embodiment of the present utility model.

[0022] Figure 5 This is a schematic diagram of the assembly of the aluminum busbar and sampling terminals of the CCS sampling device according to an embodiment of the present invention.

[0023] Figure label:

[0024] Connector 1, sampling line 2, branch sampling line 21, sampling wire 22, sampling terminal 3, first conductive terminal 31, snap-fit ​​protrusion 311, through hole 312, fusible conductor 32, second conductive part 33, first conductive part 34, snap hole 341, aluminum busbar 4, protective sleeve 5. Detailed Implementation

[0025] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] like Figures 1-5 As shown, the CCS sampling device of this utility model embodiment includes a connector 1, a sampling line 2, a sampling terminal 3, and an aluminum bus 4.

[0027] Specifically, one end of the sampling line 2 is connected to the connector 1, and the other end is divided into multiple branch sampling lines 21. Each branch sampling line 21 includes multiple sampling wires 22. One end of each sampling wire 22 is connected to the connector 1, and the other end is connected to a sampling terminal 3. The sampling terminal 3 includes a first conductive terminal 31 and a second conductive terminal. The first conductive terminal 31 is connected to the Albar bus 4. The second conductive terminal includes a first conductive part 34 connected to the first conductive terminal 31 and a second conductive part 33 connected to the sampling wire 22. The first conductive part 34 and the second conductive part 33 are connected by a fusible conductor 32.

[0028] It is understood that the second conductive terminal of this application is composed of a first conductive part 34, a fusible conductor 32, and a second conductive part 33 connected together. In the event of a short circuit during installation or operation, the fusible conductor 32, which has the lowest current carrying capacity, will melt, thus preventing the sampling lead 22 from burning out. Only the damaged second conductive terminal needs to be replaced, without damaging the entire CCS sampling device or rendering the battery pack unusable. Preferably, the fusible conductor 32 is a fuse, the first conductive terminal 31 is a nickel-plated terminal, and the second conductive terminal is a copper-plated terminal.

[0029] In this embodiment of the CCS sampling device, one end of the sampling line 2 is connected to the connector 1, and the other end is divided into multiple branch sampling lines 21. Each branch sampling line 21 includes multiple sampling wires 22. One end of each sampling wire 22 is connected to the connector 1, and the other end is connected to a sampling terminal 3. The sampling terminal 3 includes a first conductive terminal 31 and a second conductive terminal. The first conductive terminal 31 is connected to the aluminum busbar 4, and the second conductive terminal includes a first conductive part 34 connected to the first conductive terminal 31 and a second conductive part 33 connected to the sampling wire 22. The first conductive part 34 and the second conductive part 33 are connected by a fusible conductor 32. Thus, when a short circuit occurs at the installation or operation site, the fusible conductor 32 will melt, thereby protecting the sampling wires 22 and preventing damage to the entire CCS sampling device or the battery pack from being scrapped. Only the damaged second conductive terminal needs to be replaced, reducing costs.

[0030] Furthermore, such as Figure 5As shown, the first conductive part 34 has a snap-fit ​​groove, and the first conductive terminal 31 fits into the snap-fit ​​groove and snaps into the first conductive part 34. Therefore, the first conductive part 34 and the first conductive terminal 31 can be quickly inserted and removed, improving assembly efficiency.

[0031] Specifically, such as Figure 4 As shown, the first conductive part 34 includes a base plate, a first side plate, and a second side plate. The first side plate and the second side plate are connected to opposite sides of the base plate to form a snap-fit ​​groove. The first conductive terminal 31 includes a first side surface and a second side surface opposite to the first side plate and the second side plate, respectively. A snap-fit ​​protrusion 311 is provided on the first side surface and / or the second side surface. The first conductive part 34 is provided with a snap-fit ​​hole 341 adapted to the snap-fit ​​protrusion 311. Figure 3 and Figure 4 As shown, both sides of the first conductive terminal 31 are provided with snap-fit ​​protrusions 311, and both the first side plate and the second side plate are provided with snap-fit ​​holes 341 corresponding to the snap-fit ​​protrusions 311. When the first conductive terminal 31 moves along the snap-fit ​​groove to the position where the snap-fit ​​protrusions 311 and the snap-fit ​​holes 341 correspond, the snap-fit ​​protrusions 311 will extend into the snap-fit ​​holes 341 to realize the snap-fit ​​between the first conductive terminal 31 and the first conductive part 34.

[0032] Understandably, the first and second side plates can have a small amount of deformation to facilitate a smooth snap-fit ​​process.

[0033] It should be noted that the snap-fit ​​structure between the first conductive part 34 and the first conductive terminal 31 is not limited to the engagement form of the snap-fit ​​protrusion 311 and the snap-fit ​​hole 341. As long as the snap-fit ​​plate 34 and the first conductive terminal 31 can be quickly inserted and pulled out and locked, there are no restrictions here.

[0034] Furthermore, such as Figure 3 As shown, the first conductive terminal 31 has a through hole 312 extending through it along its thickness direction. The base plate has a corresponding connecting hole 312. The through hole 312 and the connecting hole allow a connector to pass through to connect the first conductive terminal 31 and the base plate. In other words, after the first conductive part 34 engages with the first conductive terminal 31, the connector can further fix the first conductive part 34 and the first conductive terminal 31. The combination of engagement and fixation further stabilizes the connection between the first conductive part 34 and the first conductive terminal 31.

[0035] Furthermore, such as Figure 4 As shown, the first side plate and / or the second side plate are bent inward to form a pressing plate that is opposite to and spaced apart from the base plate. The pressing plate is used to press the first conductive terminal 31. In other words, the pressing plate and the base plate can clamp the first conductive terminal 31, further ensuring the stability of the assembly between the first conductive part 34 and the first conductive terminal 31.

[0036] In some embodiments, the CCS sampling device further includes a protective sleeve 5, which is fitted around the outer periphery of the sampling terminal 3. It is understood that the protective sleeve 5 can be first fitted onto the sampling harness. After the first conductive part 34 and the first conductive terminal 31 are snapped together, the protective sleeve 5 can slide and cover the sampling terminal 3. When the fusible conductor 32 melts, the protective sleeve 5 can effectively protect the second conductive terminal from random detachment when it burns out, avoiding secondary damage.

[0037] In some embodiments, multiple branch sampling lines 21 extend in the same direction, and adjacent branch sampling lines 21 are spaced apart to form a clearance zone. Specifically, as Figure 1 As shown, there are two branch sampling lines 21. One end of each line is tied together to form sampling line 2, and the other end is U-shaped and spaced apart to form a clearance area. The clearance area can avoid structural components on the battery module, such as explosion-proof valves or other protruding structures.

[0038] Furthermore, as a preferred embodiment, such as Figure 1 As shown, each sampling wire 22 has an extension section extending outward toward the avoidance area at its connection point with the sampling terminal 3. Multiple extension sections are spaced apart along the length of the branch sampling line 21 to facilitate corresponding arrangement with each battery cell. Figure 1 The layout of the branch sampling line 21 and the sampling wire 22 is shown. By adopting a side-by-side flat structure for the multiple sampling wires 22, it is beneficial to improve the overall integrity of the wire harness arrangement, and it is also convenient to connect each sampling wire 22 to each aluminum busbar 4.

[0039] It should be noted that, in this embodiment, in addition to using two branch sampling lines 21, the sampling line 2 can also use multiple other branch sampling lines 21, and the branch sampling lines 21 can be arranged at intervals. Furthermore, the formed avoidance zone can be used not only to avoid explosion-proof valves but also to avoid other structural components; this embodiment does not impose any restrictions on this.

[0040] In addition, the multi-strand sampling wires 22 in this embodiment can be set to different colors to facilitate differentiation, reduce the difficulty of manual connection, and improve assembly efficiency.

[0041] The battery pack of this utility model embodiment includes a BMS battery management system and a CCS sampling device as described in the above embodiment, with connector 1 plugged into the BMS sampling port of the BMS battery management system.

[0042] The battery pack of this utility model embodiment uses the above-mentioned CCS sampling device. One end of the sampling line 2 is connected to the connector 1, and the other end is divided into multiple branch sampling lines 21. Each branch sampling line 21 includes multiple sampling wires 22. One end of each sampling wire 22 is connected to the connector 1, and the other end is connected to a sampling terminal 3. The sampling terminal 3 includes a first conductive terminal 31 and a second conductive terminal. The first conductive terminal 31 is connected to the aluminum busbar 4. The second conductive terminal includes a first conductive part 34 connected to the first conductive terminal 31 and a second conductive part 33 connected to the sampling wire 22. The first conductive part 34 and the second conductive part 33 are connected by a fusible conductor 32. Therefore, when a short circuit occurs at the installation or operation site, the fusible conductor 32 will melt, thereby protecting the sampling wires 22 and preventing damage to the entire CCS sampling device or scrapping of the battery pack. Only the damaged second conductive terminal needs to be replaced, reducing costs.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0048] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A CCS sampling device, characterized in that, The device includes a connector, a sampling line, a sampling terminal, and an aluminum busbar. One end of the sampling line is connected to the connector, and the other end is divided into multiple branch sampling lines. Each branch sampling line includes multiple sampling wires. One end of each sampling wire is connected to the connector, and the other end is connected to a sampling terminal. The sampling terminal includes a first conductive terminal and a second conductive terminal. The first conductive terminal is connected to the aluminum busbar, and the second conductive terminal includes a first conductive part connected to the first conductive terminal and a second conductive part connected to the sampling wire. The first conductive part and the second conductive part are connected by a fusible conductor.

2. The CCS sampling device according to claim 1, characterized in that, The first conductive part has a snap-fit ​​groove, and the first conductive terminal is fitted into the snap-fit ​​groove and snap-fitted into the first conductive part.

3. The CCS sampling device according to claim 2, characterized in that, The first conductive part includes a base plate, a first side plate and a second side plate. The first side plate and the second side plate are connected to opposite sides of the base plate to form the snap-fit ​​groove. The first conductive terminal includes a first side surface and a second side surface that are respectively opposite to the first side plate and the second side plate. The first side surface and / or the second side surface are provided with snap-fit ​​protrusions. The first conductive part is provided with snap-fit ​​holes that are adapted to the snap-fit ​​protrusions.

4. The CCS sampling device according to claim 3, characterized in that, The first conductive terminal has a through hole extending through the first conductive terminal along its thickness direction, and the base plate has a connection hole corresponding to the through hole. The through hole and the connection hole are used for a connector to pass through to connect the first conductive terminal and the base plate.

5. The CCS sampling device according to claim 3, characterized in that, The first side plate and / or the second side plate are bent inward to form a pressing plate that is opposite to and spaced apart from the bottom plate, and the pressing plate is used to press the first conductive terminal.

6. The CCS sampling device according to any one of claims 1-5, characterized in that, It also includes a protective sleeve, which is fitted around the outer periphery of the sampling terminal.

7. The CCS sampling device according to claim 1, characterized in that, The multiple branch sampling lines extend in the same direction, and adjacent branch sampling lines are spaced apart to form a clearance zone.

8. The CCS sampling device according to claim 7, characterized in that, Each of the sampling wires has an extension section extending outward toward the outside of the avoidance area at the connection end with the sampling terminal, and the plurality of the extension sections are arranged at intervals along the length direction of the branch sampling line.

9. The CCS sampling device according to claim 1, characterized in that, The fusible conductor is a fuse; and / or the first conductive terminal is a nickel plate terminal; and / or the second conductive terminal is a copper plate terminal.

10. A battery pack, characterized in that, It includes a BMS battery management system and a CCS sampling device according to any one of claims 1-9, wherein the connector is plugged into the BMS sampling port of the BMS battery management system.

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