CCS assembly, battery pack and vehicle
By designing an adjustable sampling branch connection method in the CCS component, the problem of poor versatility of existing CCS components is solved, and the adaptation of battery cells is achieved is achieved, and the manufacturing cost of the battery pack is reduced.
Patent Information
- Application Number
- CN202420244768.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-31
- Publication Date
- 2025-02-28
- Estimated Expiration
- 2034-01-31
AI Technical Summary
The existing CCS components are less versatile when adapting to different specifications and models of battery cells, resulting in the need to be equipped with CCS components of different specifications and models, which increases manufacturing costs.
A CCS component is designed, wherein a plurality of first connection parts are provided on the FFC wire body and a plurality of second connection parts are provided on the sampling branch. By connecting the second connection part with the first connection part, the extended length of the battery cell sampling part of the sampling branch on the FFC wire body is adjusted to adapt to the battery cell of different specifications and sizes.
The versatility of CCS components is improved, so that a CCS component can be suitable for battery cells of different specifications and models, reducing the manufacturing cost of battery packs.
Smart Images
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Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of battery packs, and in particular to a CCS component, a battery pack and a vehicle. Background Art
[0002] The CCS component (full name Cells Contact System) configured in the battery pack is composed of components such as sampling harnesses and bus bars. The bus bars are welded to the battery cells in the battery pack to realize series and parallel connection of the battery cells. The sampling harnesses are connected to the bus bars to sample the temperature and voltage signals of the battery cells, so as to facilitate real-time monitoring of the battery cell status.
[0003] In the related art, the sampling harness includes an FFC line body (flexible flat cable) and multiple sampling branches, which are arranged on the FFC line body at intervals along the length direction of the FFC line body. The sampling branches collect the temperature signal and voltage signal of the battery cell and transmit them to the battery management system for monitoring through the FFC line body. However, since the length of the sampling branch extending out of the FFC line body is fixed, when sampling batteries of different specifications and models, CCS components of different specifications and models need to be equipped for sampling, resulting in poor versatility of the CCS components. Utility Model Content
[0004] The present disclosure aims to solve at least one of the technical problems in the related art to a certain extent. To this end, the embodiments of the present disclosure provide a CCS assembly with good versatility, the embodiments of the present disclosure provide a battery pack with low manufacturing cost, and the embodiments of the present disclosure provide a vehicle with low manufacturing cost.
[0005] The CCS component disclosed in the present invention includes an FFC line body and a sampling branch, wherein the FFC line body has a first connection part group, the first connection part group includes a plurality of first connection parts arranged along the width direction of the FFC line body; one end of the sampling branch has a battery cell sampling part, and the other end of the sampling branch has a second connection part group, the second connection part group includes a plurality of second connection parts arranged along the length direction of the sampling branch, and at least some of the second connection parts in the second connection part group correspond to at least some of the first connection parts in the first connection part group in a one-to-one manner and are connected to each other.
[0006] In some embodiments, the outer surface of the sampling branch is covered with an insulating film, and the battery cell sampling portion and the second connecting portion are exposed through the insulating film.
[0007] In some embodiments, the first connecting portion is a first solder pad with a window on the FFC line body, and the first solder pad extends along the length direction of the FFC line body. The second connecting portion is a second solder pad with a window on the sampling branch, and the second solder pad extends along the width direction of the sampling branch. The first solder pad is welded to the second solder pad.
[0008] In some embodiments, the sampling branch is an FPC line or an FDC line.
[0009] In some embodiments, the CCS assembly of the present disclosure further includes a bus bar, which is arranged at intervals from the FFC wire body in the width direction of the FFC wire body, and the battery cell sampling part is connected to the bus bar.
[0010] In some embodiments, the battery cell sampling portion has a first welding portion, the first welding portion is arranged toward the bus bar, the bus bar has a second welding portion, and the first welding portion is connected to the second welding portion by welding.
[0011] In some embodiments, the first welding portion has a first welding plane, the second welding portion is disposed on the top of the busbar and has a second welding plane, and the first welding plane is welded to the second welding plane; and / or
[0012] The first welding portion has a first welding plane, the bus is provided with a nickel sheet, the nickel sheet forms the second welding portion, and the surface of the nickel sheet facing the sampling branch is a plane, and the first welding plane is welded on the surface of the nickel sheet facing the sampling branch.
[0013] In some embodiments, the CCS assembly of the present disclosure further includes a connector, which is disposed at one end of the FFC line body in its length direction, and the connector is connected to the FFC line body by welding or crimping, and the connector is used to connect to a battery management system.
[0014] The battery pack disclosed herein comprises a battery cell module and a CCS assembly, wherein the CCS assembly is the CCS assembly described in any of the above embodiments, and the CCS assembly is arranged on the battery cell module and connected to the battery cells in the battery cell module.
[0015] The vehicle of the present disclosure includes the battery pack described in any of the above embodiments.
[0016] When assembling the CCS component of the present invention, by connecting the second connecting parts at different positions on the sampling branch with the first connecting parts on the FFC line body, the length of the battery cell sampling part of the sampling branch extending out of the FFC line body in the width direction of the FFC line body can be adjusted to adapt to sampling of battery cells of different specifications and sizes, so that the CCS component of the embodiment of the utility model has better versatility. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural schematic diagram of the CCS component of an embodiment of the utility model.
[0018] Figure 2 It is a schematic structural diagram of a sampling branch of an embodiment of the utility model.
[0019] Figure 3 It is a structural schematic diagram of a CCS assembly of another embodiment of the utility model.
[0020] Reference numerals:
[0021] 100, CCS assembly; 1, FFC line body; 101, first connection part group; 1011, first connection part; 2, sampling branch; 201, battery cell sampling part; 2011, first welding part; 202, second connection part group; 2021, second connection part; 3, bus; 301, second welding part; 4, connector; 5, nickel sheet. DETAILED DESCRIPTION
[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.
[0023] The technical solution of the present application is described in detail below with reference to the accompanying drawings.
[0024] like Figures 1 to 3As shown, the CCS assembly 100 of the embodiment of the utility model includes an FFC line body 1 and a sampling branch 2. The FFC line body 1 has a first connection part group 101, and the first connection part group 101 includes a plurality of first connection parts 1011 arranged along the width direction of the FFC line body 1. One end of the sampling branch 2 has a battery sampling part 201, and the other end of the sampling branch 2 has a second connection part group 202. The second connection part group 202 includes a plurality of second connection parts 2021 arranged along the length direction of the sampling branch 2. At least part of the second connection parts 2021 in the second connection part group 202 corresponds to at least part of the first connection parts 1011 in the first connection part group 101 and is connected to each other. Among them, the FFC line body 11 is a flexible cable, which is made of copper foil material of rolled copper, and the thickness is generally 0.1mm. The FFC line body 11 is made by hot pressing a number of parallel copper wires.
[0025] When the sampling branch 2 of the CCS assembly 100 of the embodiment of the utility model is connected to the FFC line body 1, the length direction of the sampling branch 2 is set perpendicular to the length direction of the FFC line body 1, that is, the length direction of the sampling branch 2 is the width direction of the FFC line body 1, and the width direction of the sampling branch 2 is the length direction of the FFC line body 1. Specifically, Figure 1 The first connection part group 101 is arranged on the surface of the FFC wire body 1 facing the sampling branch 2 in the thickness direction, and the second connection part group 202 is arranged on the surface of the sampling branch 2 facing the FFC wire body 1 in the thickness direction, so that the first connection part 1011 is connected to the second connection part 2021.
[0026] Since the multiple second connection parts 2021 are arranged along the length direction of the sampling branch 2, when the battery cell sampling part 201 of the sampling branch 2 needs to extend a larger length along the width direction of the FFC cable body 1, a second connection part 2021 located relatively far away from the battery cell sampling part 201 can be connected to a first connection part 1011 on the FFC cable body 1, or multiple second connection parts 2021 located relatively far away from the battery cell sampling part 201 can be connected to multiple first connection parts 1011 on the FFC cable body 1 in a one-to-one correspondence.
[0027] When the battery cell sampling portion 201 of the sampling branch 2 needs to extend a smaller length along the width direction of the FFC wire body 1, a second connection portion 2021 located closer to the battery cell sampling portion 201 can be connected to a first connection portion 1011 on the FFC wire body 1, or multiple second connection portions 2021 located closer to the battery cell sampling portion 201 can be connected to multiple first connection portions 1011 on the FFC wire body 1 in one-to-one correspondence.
[0028] When the cell sampling portion 201 of the sampling branch 2 needs to extend a normal length along the width direction of the FFC cable body 1 , each second connection portion 2021 on the sampling branch 2 can be aligned one-to-one with the positions of the multiple first connection portions 1011 on the FFC cable body 1 and connected.
[0029] Therefore, the CCS component 100 of the embodiment of the utility model can adjust the length of the battery cell sampling part 201 of the sampling branch 2 extending out of the FFC cable body 1 in the width direction of the FFC cable body 1 by connecting the second connecting part 2021 at different positions on the sampling branch 2 with the first connecting part 1011 on the FFC cable body 1, so as to adapt to the sampling of battery cells of different specifications and sizes, thereby making the CCS component 100 of the embodiment of the utility model more universal.
[0030] In some embodiments, the outer surface of the sampling branch 2 is covered with an insulating film, and the battery cell sampling part 201 and the second connecting part 2021 are exposed through the insulating film. For example, the battery cell sampling part 201 and the second connecting part 2021 are exposed by opening windows in the insulating film. The insulating film can be used to electrically insulate the portion of the sampling branch 2 other than the battery cell sampling part 201 and the second connecting part 2021, thereby avoiding short circuit of the sampling branch 2 between poles of different polarities of the battery cell, thereby improving sampling safety.
[0031] In some embodiments, Figure 1 and Figure 2 As shown, the first connection part 1011 is a first welding pad with a window opened on the FFC line body 1, and the first welding pad extends along the length direction of the FFC line body 1. The second connection part 2021 is a second welding pad with a window opened on the sampling branch 2, and the second welding pad extends along the width direction of the sampling branch 2. The first welding pad is welded to the second welding pad.
[0032] It is understandable that the opening of the pad window can remove the solder mask ink or paint layer covering the wire, so that the wire is partially or completely exposed to the copper surface, and the solder is more easily attached to the wire, reducing the risk of short circuit, which is not only convenient for welding, but also can improve the quality of welding; in addition, the opening of the window also helps to increase the thickness of the copper foil during later welding, so as to handle high current applications. Therefore, the CCS component 100 of the embodiment of the utility model is to improve the connection reliability between the sampling branch 2 and the FFC line body 1 by making the first connecting part 1011 a first pad with a window on the FFC line body 1, and the second connecting part 2021 a second pad with a window on the sampling branch 2, and the first pad and the second pad are welded and connected, and there is no need to perform a more complicated SMT (surface mount technology) for connection, the process is simple, the cost is low, and the efficiency is high. In addition, the failure rate of components is also greatly reduced, which is conducive to reducing the failure rate.
[0033] Of course, in other embodiments, one of the first connection part 1011 and the second connection part 2021 can be a conductive wire, and the other of the first connection part 1011 and the second connection part 2021 can be a wire clamp, and the electrical connection between the sampling branch 2 and the FFC wire body 1 is achieved by clamping the conductive wire with the wire clamp.
[0034] In some embodiments, the sampling branch 2 is an FPC line or an FDC line. Among them, FPC, that is, a flexible circuit board, has the following advantages: 1. Flexibility: One of the biggest advantages of FPC is its bendability. It can be flexibly routed in three-dimensional space, and can be curled and folded within a certain range without damage, which is convenient for the arrangement of the sampling branch 2; 2. Reduce the volume. Since the conductor cross-section of FPC is usually thinner and flatter than that of rigid PCB, it can help reduce the space occupied by the sampling branch 2; 3. Reduce weight. Under the condition of the same volume and current carrying capacity, FPC is about 70% lighter than wire cable and 90% lighter than rigid PCB, which is conducive to reducing the overall weight of CCS assembly 100100;
[0035] FDC line, or flexible die-cut wiring harness board, is a technology that combines electronic wiring harnesses and flexible circuit boards. It has the following advantages: 1. Space saving. FDC line can greatly save space by integrating wiring harnesses and circuit boards. 2. Improved reliability. FDC line adopts automated production to ensure the consistency and quality of production. At the same time, the integration of wiring harnesses and circuit boards reduces the possibility of wiring errors and poor contact, and improves product reliability. 3. Cost reduction. Due to the automation of the production process of FDC line, it can reduce labor costs and error rates, thereby reducing production costs.
[0036] In some embodiments, the CCS assembly 100 of the utility model embodiment includes a busbar 3, which is spaced apart from the FFC line body 1 in the width direction of the FFC line body 1, and the cell sampling part 201 is connected to the busbar 3. Specifically, the busbar 3 is welded to the poles of multiple cells of the cell module by laser penetration welding to realize the series and parallel connection of the cells, and then the cell sampling part 201 is connected to the busbar 3, so as to facilitate the installation of the cell sampling part 201 and improve the assembly efficiency.
[0037] In some embodiments, the cell sampling part 201 has a first welding part 2011, the first welding part 2011 is arranged toward the bus 3, the bus 3 has a second welding part 301, and the first welding part 2011 is welded to the second welding part 301. Specifically, the first welding part 2011 is arranged on the surface of the sampling branch 2 facing the bus, and the second welding part 301 is arranged on the surface of the bus 3 facing the sampling branch 2, so as to realize the rapid connection between the sampling branch 2 and the bus 3, which is conducive to improving the connection efficiency, thereby improving the assembly efficiency of the CCS assembly 100.
[0038] For example, the first welding part 2011 is connected to the second welding part 301 by ultrasonic welding. Ultrasonic welding is a thermoplastic welding technology that uses ultrasonic vibrations, and has the following advantages: First, fast and efficient. The process of ultrasonic welding is very fast, and the welding time is usually between a few hundred milliseconds and a few seconds. At the same time, since no additional filling materials are required during the welding process, production time and cost can be saved. Second, no need to add materials. Ultrasonic welding does not require the use of welding materials, such as solder or glue, which not only simplifies the welding process, but also avoids the environmental pollution and health risks that may be caused by adding materials. Third, no heat-affected zone. Compared with traditional thermal welding methods, ultrasonic welding produces a smaller heat-affected zone, which means that the thermal deformation around the welded parts is smaller, making the welding process more precise and controllable. Fourth, high strength and stability. Ultrasonic welding forms a solid weld at the welding joint, and its strength is usually comparable to the welding material itself. Since the weld has no obvious bumps or pores, the quality of the welded joint is very stable. Fifth, precise welding control. The ultrasonic welding system can achieve precise control of welding parameters, such as welding time, pressure, amplitude, etc., which makes the welding process highly repeatable and consistent. 6. High energy efficiency: Ultrasonic welding has high energy conversion efficiency and almost no energy waste. Therefore, it is an energy-saving and environmentally friendly welding method.
[0039] In some embodiments, the first welding portion 2011 has a first welding plane, wherein the first welding plane is obtained by opening a window in the sampling branch 2, the second welding portion 301 is arranged on the top of the bus 3 and has a second welding plane, and the first welding plane is welded on the second welding plane to increase the welding area between the first welding portion 2011 and the second welding portion 301, which can avoid the desoldering phenomenon caused by the small welding area between the first welding portion 2011 and the second welding portion 301 due to the high local temperature when the battery cell is charged and discharged with a large current, and can effectively ensure the welding reliability of the first welding portion 2011 and the second welding portion 301.
[0040] Of course, in other embodiments, such as Figure 3 As shown, the first welding portion 2011 has a first welding plane, wherein the first welding plane is obtained by opening a window in the sampling branch 2, a nickel sheet 5 is provided on the bus 3, the nickel sheet 5 is welded to the bus 3, the nickel sheet 5 forms a second welding portion 301, and the surface of the nickel sheet 5 facing the sampling branch 2 is a plane, and the first welding plane is welded on the surface of the nickel sheet 5 facing the sampling branch 2, but since the nickel sheet 5 is expensive, it is a component with a relatively high cost ratio, which is not conducive to cost reduction.
[0041] In some embodiments, the CCS assembly 100 of the utility model further includes a connector 4, which is arranged at one end of the FFC cable body 1 in the length direction, and the connector 4 is connected to the FFC cable body 1 by welding or crimping, and the connector 4 is used to connect to the battery management system. This makes it unnecessary to perform a more complicated SMT (surface mount technology) connection between the connector 4 and the FFC cable body 1, and the process is simple, the cost is low, the efficiency is high, and the failure rate of components is greatly reduced, which is conducive to reducing the failure rate.
[0042] The battery pack of the embodiment of the utility model includes a battery cell module and a CCS assembly 100 . The CCS assembly 100 is the CCS assembly 100 in any of the above embodiments. The battery cell sampling part 201 of the sampling branch 2 is connected to the pole of the battery cell in the battery cell module 100 .
[0043] Specifically, when assembling the battery pack, first place the bus 3 on the top of the battery module, and the bus 3 is welded to the poles of multiple cells of the battery module by laser penetration welding to realize the series and parallel connection of the cells. Then place the FFC wire body 1 on the battery module, so that the length direction of the FFC wire body 1 is parallel to the length direction of the bus 3, the FFC wire body 1 is arranged at intervals with the bus 3 in its width direction, the length direction of the sampling branch 2 is perpendicular to the FFC wire body 1, the battery sampling part 201 at one end of the sampling branch 2 is welded to the bus 3, and the second connection part 2021 at the other end of the sampling branch 2 is welded to the first connection part 1011 on the FFC wire body 1, thereby completing the installation of the CCS assembly 100 on the battery module. When assembling the battery pack, due to the good versatility of the CCS component 100, one CCS component 100 can be used for sampling of battery cells of different specifications and models, thereby reducing the specifications and models of the CCS component 100 to reduce the manufacturing cost of the battery pack, so that the battery pack of the embodiment of the utility model has the advantage of low manufacturing cost.
[0044] The vehicle of the embodiment of the utility model includes the battery pack described in any of the above embodiments, so that the vehicle of the embodiment of the utility model has the advantage of low manufacturing cost.
[0045] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0047] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0048] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.
[0049] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.
[0050] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.
Claims
1. A CCS component, characterized in that: include: An FFC line body, wherein the FFC line body has a first connection portion group, wherein the first connection portion group includes a plurality of first connection portions arranged along a width direction of the FFC line body; A sampling branch, one end of the sampling branch has a battery cell sampling portion, and the other end of the sampling branch has a second connection portion group, the second connection portion group includes a plurality of second connection portions arranged along the length direction of the sampling branch, at least part of the second connection portions in the second connection portion group corresponds to at least part of the first connection portions in the first connection portion group in a one-to-one manner and is connected to each other.
2. The CCS assembly according to claim 1, characterized in that: The outer surface of the sampling branch is covered with an insulating film, and the battery cell sampling portion and the second connecting portion are exposed through the insulating film.
3. The CCS assembly according to claim 1, characterized in that: The first connection portion is a first pad extending along the length direction of the FFC line body, the second connection portion is a second pad extending along the width direction of the sampling branch, and the first pad is connected to the second pad by welding.
4. The CCS assembly according to claim 1, characterized in that: The sampling branch is an FPC line or an FDC line.
5. The CCS assembly according to claim 1, characterized in that: It also includes a bus bar, which is arranged at a distance from the FFC line body in the width direction of the FFC line body, and the battery cell sampling part is connected to the bus bar.
6. The CCS assembly according to claim 5, characterized in that: The cell sampling portion is provided with a first welding portion, the busbar is provided with a second welding portion, and the first welding portion is connected to the second welding portion by welding.
7. The CCS assembly according to claim 6, characterized in that: The first welding portion has a first welding plane, the second welding portion is arranged on the top of the busbar and has a second welding plane, and the first welding plane is welded on the second welding plane; and / or The first welding portion has a first welding plane, the bus is provided with a nickel sheet, the nickel sheet forms the second welding portion, and the surface of the nickel sheet facing the sampling branch is a plane, and the first welding plane is welded on the surface of the nickel sheet facing the sampling branch.
8. The CCS assembly according to claim 1, characterized in that: It also includes a connector, which is arranged at one end of the FFC line body in its length direction, and the connector is welded or crimped to the FFC line body, and the connector is used to connect to a battery management system.
9. A battery pack, characterized in that: include: Battery cell module; and The CCS component is the CCS component described in any one of claims 1-8, the CCS component is arranged on the battery cell module, and the battery cell sampling part of the sampling branch is connected to the pole of the battery cell in the battery cell module.
10. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 9.