Battery pack sampling line structure and battery pack

Abstract

This invention provides a battery pack sampling circuit structure and a battery pack. The battery pack sampling circuit structure of this invention includes a main cable and branch cables connected to the main cable. The main cable includes multiple main cable layers arranged in a stacked manner, and the branch cables include multiple sub-cables. One end of each sub-cable is connected to any main cable layer. Each main cable layer has a main connection terminal located at the end of the main cable, and the other end of each sub-cable has a branch connection terminal relative to the end connected to the main cable layer. The battery pack sampling circuit structure of this invention, by setting up a main cable and branch cables connected to the main cable, simplifies the sampling circuit structure and facilitates the processing and manufacturing of the sampling circuit. At the same time, the structural design of multiple main cable layers arranged in a stacked manner helps to reduce the space occupied by the sampling circuit, making it easier to install and fix the sampling circuit, and has good practicality.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a battery pack sampling circuit structure. This invention also relates to a battery pack incorporating this sampling circuit structure. Background Technology

[0002] As the core of the energy system of new energy vehicles, the power battery requires the battery management system to detect various parameters such as voltage and temperature. The battery management system connects to the detection module through sampling lines to obtain data on relevant battery parameters.

[0003] Existing battery pack testing modules often employ wire harness wiring, but the fabrication process for wire harnesses and terminals is cumbersome and time-consuming. Furthermore, due to the numerous interfaces of the wire harness-related components on the battery pack, and with the increasing energy density of battery packs, the space available for electrical components is limited, making the sampling circuitry difficult to install and secure. In summary, the existing sampling circuitry is inconvenient to fabricate and install, and its practicality needs improvement. Summary of the Invention

[0004] In view of this, the present invention aims to provide a battery pack sampling circuit structure to facilitate the processing, fabrication, installation, and fixation of the sampling circuit, thereby improving the practicality of the sampling circuit.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A battery pack sampling circuit structure includes a main cable and branch cables connected to the main cable; the main cable includes multiple main cable layers arranged in a stacked manner, the branch cables include multiple sub-cables, and one end of each sub-cable is connected to any one of the main cable layers; each main cable layer has a main connection terminal located at the end of the main cable, and the other end of each sub-cable has a branch connection terminal relative to the end connected to the main cable layer.

[0007] Furthermore, the branch cables are multiple cables arranged at intervals along the length of the main cable.

[0008] Furthermore, the sub-wires in the branch cable are separated from each other, or the sub-wires in the branch cable are connected as one unit.

[0009] Furthermore, the separate sub-buses are connected together by a reinforcing member, and the reinforcing member is located at the end of each sub-bus that has the branch connection terminal.

[0010] Furthermore, the main connection terminal includes main pins respectively disposed at the ends of each of the main line layers.

[0011] Furthermore, the end of the main cable is provided with a main pin adapter, and the main pins at the end of each main cable layer are connected to the main pin adapter.

[0012] Furthermore, the branch connection terminal includes gold fingers or pin headers respectively disposed at one end of each of the sub-wires.

[0013] Furthermore, each of the main lines uses FFC cabling, and each of the sub-lines uses FDC cabling.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] The battery pack sampling circuit structure described in this invention simplifies the sampling circuit structure by setting up a main cable and branch cables connected to the main cable, which facilitates the processing and manufacturing of the sampling circuit. At the same time, the structural design of multiple main cables stacked in layers helps to reduce the space occupied by the sampling circuit, making it easier to install and fix the sampling circuit, thus having good practicality.

[0016] Furthermore, using multiple branch cables at intervals facilitates the expansion of the sampling line branches and allows for easy connection between the sampling line and multiple interfaces on the battery pack, thereby improving the practicality of the sampling line structure. The separate arrangement of each sub-cable also facilitates the connection of each sub-cable to each main line layer.

[0017] Secondly, by incorporating reinforcing plates, the separately arranged sub-wires can be connected into a single unit, facilitating the insertion of branch connection terminals and improving the structural strength of the branch wires. The independent placement of main pins at the ends of each main wire layer allows for flexible and convenient insertion of each main wire layer into the battery pack. Using a main pin adapter to connect multiple main pins into a single unit facilitates rapid connection between the main connection terminals and the battery pack.

[0018] In addition, the branch connection terminals use gold fingers or pins located at the ends of the sub-buses, eliminating the need for manual connection between the branch connection terminals and the individual lines in the sub-buses. This improves the production efficiency and quality of the sampling lines and reduces production costs. The main line layer and each sub-bus uses FFC and FDC cables respectively to facilitate the processing, fabrication, and installation of the sampling lines, thus enhancing their practicality.

[0019] Another object of the present invention is to provide a battery pack having the battery pack sampling circuit structure described above.

[0020] Furthermore, the main connection terminal is connected to the low-voltage connector on the battery pack, and the branch connection terminal is connected to the BMS, BDU, or module interface in the battery pack.

[0021] The battery pack of the present invention, with the same beneficial effects as the battery pack sampling circuit structure described above, has the same advantages as the prior art, and will not be repeated here. Attached Figure Description

[0022] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the sampling line structure described in an embodiment of the present invention;

[0024] Figure 2 This is an exploded view of a portion of the sampling line structure described in an embodiment of the present invention;

[0025] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0026] Figure 4 for Figure 1 Enlarged view of point B in the middle;

[0027] Figure 5 This is a schematic diagram of the main cable and main connection terminal according to an embodiment of the present invention;

[0028] Figure 6 This is a schematic diagram of the sub-cable structure described in an embodiment of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Main cable; 11. Upper main cable layer; 12. Lower main cable layer; 13. Main connection terminal; 131. Main pin; 14. Main pin adapter;

[0031] 2. Sub-sub ...

[0032] 3. Battery pack interface. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0034] In the description of this invention, it should be noted that the use of terms such as "upper," "lower," "inner," and "outer," indicating orientation or positional relationship, is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description. It does not 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 the invention. Furthermore, the use of terms such as "first" and "second" is also for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0036] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0037] Example 1

[0038] This embodiment relates to a battery pack sampling circuit structure (hereinafter referred to as the sampling circuit structure). In terms of overall structure, it combines... Figures 1 to 6 As shown, the sampling line structure includes a main cable 1 and branch cables connected to the main cable 1.

[0039] The main cable 1 includes multiple main cable layers arranged in a stacked manner, and the branch cable includes multiple sub-cables 2, with one end of each sub-cable 2 connected to any main cable layer. Each main cable layer has a main connection terminal 13 located at the end of the main cable 1, and each sub-cable 2 has a branch connection terminal 23 at the other end relative to the end connected to the main cable layer.

[0040] As shown above, the sampling line structure of this embodiment simplifies the sampling line structure by setting up a main cable 1 and branch cables connected to the main cable 1, which facilitates the processing and manufacturing of the sampling line. At the same time, the structural design of multiple main lines stacked in layers helps to reduce the space occupied by the sampling line, making it easier to install and fix the sampling line, and has good practicality.

[0041] Based on the above overview, as an exemplary structure, this embodiment will take a sampled line structure with two main lines as an example to provide a detailed description.

[0042] At this point, for ease of description, the main cabling 1 includes an upper main cabling layer 11 and a lower main cabling layer 12 arranged in a stacked manner. Correspondingly, the branch cabling includes an upper sub-cabling 21 and a lower sub-cabling 22, with the upper sub-cabling 21 connected to the upper main cabling layer 11 and the lower sub-cabling 22 connected to the lower main cabling layer 12.

[0043] In detail, both the upper main line layer 11 and the lower main line layer 12 have multiple signal loops. According to the specific signals required by the corresponding battery pack interface 3, the upper sub-bus 21 and the lower sub-bus 22 are connected to any loop in the upper main line layer 11 and the lower main line layer 12 by means of, for example, soldering.

[0044] In practical implementation, in order to make the sampling line have good flexibility and easy installation and connection, the main line layer and sub-line cable in this embodiment adopt existing related cable products, such as flexible printed circuit board (FPC), flexible flat cable (FFC), and flexible die-cutting circuit board (FDC).

[0045] Meanwhile, in this embodiment, the upper main line layer 11 and the lower main line layer 12 are respectively connected to the upper sub-line 21 and the lower sub-line 22 by, for example, welding, and then the upper main line layer 11 and the lower main line layer 12 are stacked by, for example, adhesive bonding, so that the main line 1 and the branch line connected to the group line form an integral sampling line, so as to facilitate the installation and connection of the sampling line in the battery pack.

[0046] Of course, in addition to setting two main line layers, the number of main line layers in this embodiment can be adjusted according to the actual situation, such as using three or four main line layers stacked together, so as to set more loops in a smaller space, thereby improving the practicality of the sampling line.

[0047] As a preferred implementation method, such as Figure 1 As shown, the branch cables are arranged at intervals along the length of the main cable 1. In this case, arranging multiple branch cables at intervals facilitates the expansion of the sampling line branches and allows for easy connection between the sampling line and multiple interfaces on the battery pack, thereby improving the practicality of the sampling line structure.

[0048] In practice, the number and location of each branch cable are determined according to the position and orientation of each interface of the battery pack, so that the sampling line can connect multiple battery pack interfaces 3, and the branch cables are arranged at intervals to reduce mutual interference between the branch cables.

[0049] As a preferred implementation method, such as Figures 1 to 4As shown, in this embodiment, the sub-buses 2 in the branch cabling are separated, which facilitates the connection of each sub-buse 2 to each main layer. Of course, in addition to the separation arrangement, the sub-buses 2 in the branch cabling can also be connected into one unit to facilitate the overall plug-in of the branch cabling.

[0050] Specifically, such as Figures 2 to 4 As shown, the upper sub-cable 21 and the lower sub-cable 22 are separated, allowing the upper sub-cable 21 and the lower sub-cable 22 to be independently connected to the upper main line layer 11 and the lower main line layer 12, respectively. Then, the upper main line layer 11, connected to the upper sub-cable 21, and the lower main line layer 12, connected to the lower sub-cable 22, are connected as a single unit.

[0051] In this embodiment, as a preferred implementation, the separately arranged sub-buses 2 are connected together by a reinforcing member 25, and the reinforcing member 25 is located at the end of each sub-bus 2 that has a branch connection terminal 23. At this time, by providing the reinforcing member, it is possible to connect the separately arranged sub-buses into one unit, so as to facilitate the insertion of the branch connection terminal 23, and to improve the structural strength of the branch bus.

[0052] In detail, the reinforcing member 25 in this embodiment adopts a related structure or product well known to those skilled in the art, such as a reinforcing sheet. Specifically, as an exemplary structure, the reinforcing sheet is connected to the back of each sub-bus 2 by means of, for example, adhesive bonding, thereby connecting each sub-bus 2 into one unit.

[0053] As a preferred implementation method, such as Figure 1 and Figure 5 As shown, the main connection terminal 13 in this embodiment includes main pins 131 respectively disposed at the ends of each main line layer. This arrangement allows for flexible and convenient connection of each main line layer to the battery pack by independently providing main pins 131 at the ends of each main line layer.

[0054] In practice, the main connection terminal 13 can be made of gold fingers or other terminal forms in addition to the main pin 131. Of course, in addition to setting the main pin 131 at the end of each main layer, it is also feasible to connect the connector to the ends of both the upper main layer 11 and the lower main layer 12 at the same time, so that each main layer has a common connector.

[0055] In this embodiment, as a preferred implementation, the end of the main cable 1 is provided with a main pin adapter 14, and the main pins 131 at the ends of each main cable layer are connected to the main pin adapter 14. At this time, by using the main pin adapter 14 to connect multiple main pins 131 into one unit, it is beneficial to quickly connect the main connection terminal 13 to the battery pack.

[0056] Specifically, one end of the main connector 14 has a pin for connection to the battery pack interface 3, and the other end has a socket or pin soldering point for connection to multiple main connectors 131. By plugging or soldering, two main connectors 131 are connected to the main connector 14. Of course, in addition to the above-described form, the main connector 14 can also be an existing product with pin conversion capability.

[0057] As a preferred implementation method, such as Figure 2 , Figure 4 as well as Figure 6 As shown, the branch connection terminal 23 of this embodiment includes gold fingers 231 or pin headers 24 respectively disposed at one end of each sub-wire 2.

[0058] With this configuration, the branch connection terminal 23 in this embodiment uses gold fingers 231 or pin headers 24 located at the end of the sub-bus 2, so that the branch connection terminal 23 and each line in the sub-bus 2 do not need to be manually connected, which is beneficial to improving the production efficiency and quality of the sampling line and reducing production costs.

[0059] In specific implementation, for the battery pack interface 3 connected using gold fingers 231, the branch connection terminal in this embodiment adopts gold fingers 231 corresponding to the battery pack 3 interface. Specifically, the gold fingers 231 are formed at the end of the sub-wire 2 using relevant processing techniques and equipment well known to those skilled in the art, thus enabling connection to the corresponding battery pack interface 3 via the gold fingers 231.

[0060] Besides using the gold finger 231, it is understood that for the battery pack interface 3 connected by the pin header 24, the branch connection terminal 23 in this embodiment uses the pin header 24 located at the end of the sub-ribbon cable 2. Specifically, existing equipment is used to set the pin header 24 at the end of the sub-ribbon cable 2, so that each pin in the pin header 24 is connected to each line on the sub-ribbon cable 2, in order to adapt to different battery pack interfaces 3.

[0061] Thus, when connecting the sub-cable 2 to the battery pack interface 3, a quick-connect connection can be made between the gold fingers and the battery pack interface 3, or a pin header 24 can be provided at the end of the sub-cable 2 using existing technologies such as integral crimping and piercing terminal technology. Unlike the method of using wire harness terminals, which requires one-to-one insertion of each pin hole, the pin header 24 can be integrated and quickly connected to the battery pack interface 3, such as a plastic sheath, thereby improving the insertion efficiency. At the same time, the integrated quick-connection can also avoid pin errors, which is beneficial to improving the practicality of the sampling circuit.

[0062] In this embodiment, as a preferred implementation, each main line layer uses FFC cabling, and each sub-line 2 uses FDC cabling. In this case, the main line layer and each sub-line 2 use FFC cabling and FDC cabling respectively to facilitate the fabrication of the main line 1 and sub-line 2, and to facilitate the installation of the sampling line, thereby giving the sampling line better practicality.

[0063] In detail, both main cable 1 and sub-cable 2 have multiple circuits. When main cable 1 and sub-cable 2 are connected, there may be connections between different circuits or multiple circuits connected to the same circuit. When both main cable 1 and sub-cable 2 use FFC cabling, to avoid mixed connections between circuits on main cable 1 and sub-cable 2, they are usually connected manually or by equipment. In this case, the circuits on sub-cable 2 also need to be reordered, making the production process more complex and the overall process cost higher.

[0064] When both the main cable 1 and the sub-cable 2 use FPC cables, the large size of the battery pack sampling lines results in significant waste of FPC cable substrate, leading to high sampling line costs. Furthermore, when using FDC die-cutting technology to fabricate the sampling lines as a whole, sampling lines exceeding 1 meter in length typically require secondary die-cutting, increasing mold costs and reducing production efficiency.

[0065] In this embodiment, by using a main cable 1 with a lower cost FFC cable and a sub-cable 2 with an FDC cable, and by using existing technologies such as automated welding processes to connect the circuits on the main cable 1 and the sub-cable 2, it is beneficial to solve the problems of mixed connection of different circuits, high cost and low production efficiency.

[0066] Furthermore, by using the main cable 1 with FFC cabling and the sub-cable 2 with FDC cabling, the circuits can be selectively reordered during the production process of the sampling line. This allows the circuits on the sub-cable 2 to be arranged in a one-to-one correspondence with the circuit sequence required by the interface, thus meeting the need for rapid docking between the sampling line structure and the battery pack interface 3. It also improves the production efficiency of the sampling line and reduces production costs.

[0067] The sampling line structure in this embodiment simplifies the sampling line structure by setting a main cable 1 and branch cables connected to the main cable 1. In addition, by using gold fingers 231 or pin headers 241 at the ends of the sub-cables 2, the production efficiency and quality of the sampling line are improved, and the production cost is reduced. At the same time, the structural design of multiple main lines stacked in layers helps to reduce the space occupied by the sampling line, thereby facilitating the installation and fixing of the sampling line and improving the practicality of the sampling line.

[0068] Example 2

[0069] This embodiment relates to a battery pack, which is equipped with the sampling circuit structure described in Embodiment 1. Any structures not mentioned in the battery pack can be found using existing structures.

[0070] The battery pack in this embodiment, by applying the sampling circuit structure of Embodiment 1, facilitates the installation of the sampling circuit, thereby improving the practicality of the sampling circuit.

[0071] In a preferred embodiment, the main connection terminal 13 is connected to a low-voltage connector on the battery pack, and the branch connection terminal 23 is connected to a BMS, BDU, or module interface in the battery pack. In this case, connecting the main connection terminal 13 and the branch connection terminal 23 to multiple battery pack interfaces 3 facilitates the transmission of sampling signals between these interfaces.

[0072] The battery pack in this embodiment, by applying the sampling line structure of Embodiment 1, facilitates the installation of sampling lines to connect multiple battery pack interfaces 3, thus possessing good practicality.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A battery pack sampling circuit structure, characterized in that: Includes a main cable and branch cables connected to the main cable; The main cabling includes multiple main cabling layers arranged in a stacked manner, and the branch cabling includes multiple sub-cabs, with one end of each sub-cabling connected to any of the main cabling layers; Each of the main wire layers has a main connection terminal located at the end of the main cable, and each of the sub-cables has a branch connection terminal at the other end relative to the end connected to the main wire layer; The main cabling and the branch cabling connected to the main cabling can form a whole; The branch connection terminal includes gold fingers or pin headers respectively disposed at one end of each of the sub-wires.

2. The battery pack sampling circuit structure according to claim 1, characterized in that: The branch cables are multiple cables arranged at intervals along the length of the main cable.

3. The battery pack sampling circuit structure according to claim 1, characterized in that: The sub-wires in the branch cable are separated from each other, or the sub-wires in the branch cable are connected into one unit.

4. The battery pack sampling circuit structure according to claim 3, characterized in that: The separate sub-buses are connected together by a reinforcing member, which is located at the end of each sub-bus that has the branch connection terminal.

5. The battery pack sampling circuit structure according to claim 1, characterized in that: The main connection terminal includes main pins respectively located at the ends of each of the main line layers.

6. The battery pack sampling circuit structure according to claim 5, characterized in that: The main cable is provided with a main pin adapter at its end, and the main pins at the ends of each main cable layer are connected to the main pin adapter.

7. The battery pack sampling circuit structure according to any one of claims 1-6, characterized in that: Each of the main lines uses FFC cabling, and each of the sub-lines uses FDC cabling.

8. A battery pack, characterized in that: The battery pack is provided with a battery pack sampling circuit structure as described in any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that: The main connection terminal is connected to the low-voltage connector on the battery pack, and the branch connection terminal is connected to the BMS, BDU or module interface in the battery pack.

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