Filtering connector and battery system

Abstract

The utility model provides a filtering connector and a battery system, which belongs to the technical field of filtering and comprises a connector body, a filtering circuit, a PCB (printed circuit board) filtering board and a common-mode magnetic ring. The common-mode magnetic ring is of an annular structure, and the annular structure is matched with a high-voltage bus of the connector body and arranged on the high-voltage bus in a sleeving mode to form a common-mode inductor. The filter circuit is integrated on the PCB filter board, and the filter circuit is electrically connected with the high-voltage bus; the common-mode inductor is used for absorbing common-mode interference on a high-voltage bus, the filter circuit is used for discharging the common-mode interference on the high-voltage bus, the common-mode inductor formed by the common-mode magnetic ring is tightly attached to the high-voltage bus, the filter circuit is integrated on the PCB filter board, space is saved, meanwhile, long-distance exposure of an input line of the filter is reduced, and the service life of the filter is prolonged. And the filtering effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering, and in particular to a filtering connector and a battery system. Background Art

[0002] New energy vehicles are developing rapidly, and their electromagnetic compatibility (EMC) issues are more serious and complex than those of traditional fuel vehicles. New energy vehicles have both high-voltage and low-voltage systems, and the external electromagnetic interference generated by high-voltage components when working is much higher than that of low-voltage components. Based on the high-voltage architecture of the whole vehicle, the busbars of the high-voltage components are in parallel state, and the interference will be transmitted to the inside of the battery pack through the busbars. In serious cases, it can cause the components in the pack to malfunction or stop working, triggering a vehicle failure.

[0003] However, currently most filters are installed in series in a box. Due to the width of the busbar and space limitations, the filter input end will be exposed for a long distance. The filter input line will release interference along this path due to the large exposed area, resulting in poor filtering effect or filtering failure. Utility Model Content

[0004] The utility model provides a filter connector and a battery system, which are used to solve the defect of poor high-voltage filtering effect in the prior art.

[0005] In a first aspect, the utility model provides a filter connector, comprising: a connector body, a filter circuit, a PCB filter board and a common mode magnetic ring;

[0006] The common mode magnetic ring is configured as an annular structure, the annular structure matches the high voltage busbar of the connector body, and is sleeved on the high voltage busbar to form a common mode inductor;

[0007] The filter circuit is integrated on the PCB filter board, and the filter circuit is electrically connected to the high-voltage bus;

[0008] The common-mode inductor is used to absorb the common-mode interference on the high-voltage bus, and the filter circuit is used to discharge the common-mode interference on the high-voltage bus.

[0009] According to the utility model, a filter connector is provided, which also includes: a housing;

[0010] The connector body, the filter circuit, the PCB filter board and the common mode magnetic ring are all arranged in the housing;

[0011] The grounding terminal of the filter circuit is electrically connected to the housing through a grounding stud.

[0012] According to a filter connector provided by the utility model, the housing comprises: a body and a metal cover plate;

[0013] The connector body, the filter circuit, the PCB filter board and the common mode magnetic ring are all packaged inside the body;

[0014] The metal cover plate is matched with the body, and the metal cover plate is electrically connected to the grounding end of the filter circuit through a grounding stud.

[0015] According to a filter connector provided by the utility model, the common mode magnetic ring is made of magnetic material.

[0016] According to a filter connector provided by the utility model, two common-mode magnetic rings are provided and are respectively sleeved on the high-voltage busbar.

[0017] According to the utility model, a filter connector is provided, which also includes: a connecting stud;

[0018] The connecting studs are fixedly arranged on the high-voltage busbar, and the connecting studs are used to fix the PCB filter board. The filter circuit is electrically connected to the high-voltage busbar through the connecting studs.

[0019] According to a filter connector provided by the utility model, the filter circuit includes: line capacitors and grounding capacitors;

[0020] Two ends of the line capacitor are respectively connected to the positive line and the negative line of the high-voltage bus; one end of the grounding capacitor is electrically connected to the high-voltage bus, and the other end of the grounding capacitor is grounded;

[0021] The line-to-line capacitor is used to suppress differential-mode interference on the high-voltage bus, and the grounding capacitor is used to discharge common-mode interference on the high-voltage bus.

[0022] According to a filter connector provided by the utility model, the line-to-line capacitor comprises: a first capacitor and a second capacitor;

[0023] After being connected in parallel, the first capacitor and the second capacitor are connected between the positive line and the negative line of the high-voltage bus.

[0024] According to a filter connector provided by the utility model, the grounding capacitor includes: a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor;

[0025] The third capacitor and the fourth capacitor are connected in series and connected between the positive line and the negative line of the high voltage bus;

[0026] The fourth capacitor and the fifth capacitor are connected in series and connected between the positive line and the negative line of the high voltage bus;

[0027] The third capacitor, the fourth capacitor, the fifth capacitor and the sixth capacitor are all grounded.

[0028] In a second aspect, the utility model further provides a battery system, comprising a filter connector as described in any one of the above items.

[0029] The utility model provides a filter connector and a battery system, comprising: a connector body, a filter circuit, a PCB filter board and a common-mode magnetic ring; the common-mode magnetic ring is arranged as an annular structure, the annular structure matches the high-voltage bus of the connector body, and is sleeved on the high-voltage bus to form a common-mode inductor; the filter circuit is integrated on the PCB filter board, and the filter circuit is electrically connected to the high-voltage bus; the common-mode inductor is used to absorb the common-mode interference on the high-voltage bus, and the filter circuit is used to discharge the common-mode interference on the high-voltage bus. The common-mode inductor formed by the common-mode magnetic ring is closely attached to the high-voltage bus, and the filter circuit is integrated on the PCB filter board, which saves space and reduces the long-distance exposure of the filter input line, thereby effectively improving the filtering effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0031] Figure 1 is a schematic diagram of the internal structure of the filter connector provided in this embodiment;

[0032] Figure 2 is an overall structural diagram of the filter connector provided in this embodiment;

[0033] Figure 3 yes Figure 2 Schematic diagram of some structures;

[0034] Figure 4 yes Figure 2 Exploded view of the filter connector;

[0035] Figure 5 4 is a circuit schematic diagram of the filter connector provided in this embodiment.

[0036] Reference numerals:

[0037] 1. Connector body; 2. PCB filter board; 3. Common mode magnetic ring; 4. Shell; 41. Body; 42. Metal cover; 5. Connecting studs; A. High voltage busbar. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] Figure 1 It is a schematic diagram of the internal structure of a filter connector provided in this embodiment.

[0040] like Figure 1-Figure 5 As shown, a filter connector provided by an embodiment of the utility model includes: a connector body 1, a filter circuit, a PCB filter board 2 and a common-mode magnetic ring 3; the common-mode magnetic ring 3 is set as an annular structure, the annular structure matches the high-voltage bus A of the connector body 1, and is sleeved on the high-voltage bus A to form a common-mode inductor; the filter circuit is integrated on the PCB filter board 2, and the filter circuit is electrically connected to the high-voltage bus A; the common-mode inductor L1 and the common-mode inductor L2 are used to absorb the common-mode interference on the high-voltage bus A, and the filter circuit is used to discharge the common-mode interference on the high-voltage bus A. The common-mode magnetic ring 3 is selected from a magnetic material, and two are provided, which are respectively sleeved on the high-voltage bus A. The common-mode magnetic ring adopts a prefabricated U-shaped magnetic ring, which fits tightly to the copper bus, ensuring full utilization of the magnetic ring performance while maximizing the utilization of the internal space.

[0041] In a specific implementation process, the size of the common-mode magnetic ring 3 is first adapted according to the specifications of the high-voltage bus A, so that the common-mode magnetic ring 3 is sleeved on the high-voltage bus A without shaking, and the common-mode magnetic ring 3 and the high-voltage bus A can still fit tightly. After the common-mode magnetic ring 3 is sleeved on the high-voltage bus A, the two common-mode magnetic rings 3 will form a common-mode inductor. The main function of the common-mode inductor is to absorb the common-mode interference on the high-voltage bus A. The single-turn inductance of the common-mode inductor can be selected to be 30-50μH@100kHz, thereby efficiently filtering out the common-mode interference generated by the high-voltage bus A. Usually, the common-mode inductor interacts with the filter circuit to ensure a better filtering effect. Therefore, the filter circuit is selected to be directly connected to the main positive and negative of the high-voltage bus A, and in order to ensure the stability of the structure, the filter circuit is integrated on the PCB filter board 2, and the filter circuit on the PCB filter board 2 is connected to the main positive and negative of the high-voltage bus A by electrical connection, thereby ensuring that the filter circuit can effectively suppress differential mode interference and effectively discharge common mode interference. Through the joint action of the common mode inductor and the filter circuit, the filtering effect on the high-voltage bus A is effectively improved.

[0042] Figure 2 is an overall structural diagram of the filter connector provided in this embodiment, Figure 3 yes Figure 2 Exploded view of the filter connector.

[0043] Furthermore, the filter connector is characterized in that it also includes: a shell 4; the connector body 1, the filter circuit, the PCB filter board 2 and the common mode magnetic ring 3 are all arranged in the shell 4; the ground end of the filter circuit is electrically connected to the shell 4 through a grounding stud.

[0044] Among them, the shell 4 includes: a main body 41 and a metal cover plate 42; the connector body 1, the filter circuit, the PCB filter board 2 and the common mode magnetic ring 3 are all encapsulated inside the main body 41; the metal cover plate 42 is adapted to the main body 41, and the metal cover plate 42 is electrically connected to the ground end of the filter circuit through a grounding stud.

[0045] Specifically, the housing 4 is used to encapsulate the connector body 1, the filter circuit, the PCB filter board 2 and the common mode magnetic ring 3, to achieve shielding of the overall filter-related components, and effectively avoid the coupling between the input of the high-voltage filter and external interference. The housing 4 is composed of a body 41 and a metal cover 42. The body 41 passes through the high-voltage bus A to encapsulate the filter components inside, and then the metal cover 42 is buckled with the body 41 to form a closed space. The metal cover 42 is connected to the PCB filter board 2 through a grounding stud, which can fix the filter circuit on the one hand, and realize the grounding connection in the filter circuit on the other hand.

[0046] Further, based on the above embodiment, Figure 1 As shown, the filter connector in this embodiment also includes: a connecting stud 5; the connecting stud 5 is fixedly arranged on the high-voltage bus A, the connecting stud 5 is used to fix the PCB filter board 2, and the filter circuit is electrically connected to the high-voltage bus A through the connecting stud 5.

[0047] Specifically, the PCB filter board 2 is fixed to the high-voltage bus A through the connecting studs 5, and the electrical connection between the filter circuit and the high-voltage bus A can be achieved through the connecting studs 5, effectively suppressing differential mode interference and discharging common mode interference through the filter circuit. Moreover, for the PCB board, it can also play a fixing role to ensure the stability of the entire structure. The connecting studs 5 are installable and removable structures, which facilitates the installation of the common mode magnetic ring 3 into the high-voltage bus.

[0048] Figure 4 4 is a circuit schematic diagram of the filter connector provided in this embodiment.

[0049] like Figure 4As shown, the filter circuit provided in this embodiment includes: line capacitors and grounding capacitors; the two ends of the line capacitors are respectively connected to the positive line and the negative line of the high-voltage bus A; one end of the grounding capacitor is electrically connected to the high-voltage bus A, and the other end of the grounding capacitor is grounded; the line capacitors are used to suppress differential mode interference on the high-voltage bus A, and the grounding capacitors are used to discharge common mode interference on the high-voltage bus A. The IN terminal is the high-voltage input terminal, and the OUT terminal is the high-voltage output terminal.

[0050] Among them, the line capacitance includes: a first capacitor C1 and a second capacitor C2; after the first capacitor C1 and the second capacitor C2 are connected in parallel, they are connected between the positive line and the negative line of the high-voltage bus A. The grounding capacitor includes: a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5 and a sixth capacitor C6; after the third capacitor C3 and the fourth capacitor C4 are connected in series, they are connected between the positive line and the negative line of the high-voltage bus A; after the fourth capacitor C4 and the fifth capacitor C5 are connected in series, they are connected between the positive line and the negative line of the high-voltage bus A; the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are all grounded.

[0051] Specifically, the circuit schematic diagram is composed of a filter circuit and a common mode inductor, wherein two common mode inductors are respectively connected to the two ends of the high voltage bus A to effectively absorb the common mode interference. The capacitor component in the filter circuit is divided into two parts, which are respectively cross-arranged with the common mode inductor, thereby effectively improving the filtering effect on the high voltage bus A.

[0052] The first capacitor C1 and the second capacitor C2 suppress differential mode interference, and the capacitance value can be set to 2.2μF, the third capacitor C3 and the fourth capacitor C4 can be set to 47nF, the fifth capacitor C5 and the sixth capacitor C6 can be set to 470nF, and before the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6 are grounded, a resistor of 0.2Ω-3Ω is connected in series, and the final filter circuit can better filter out the interference of the high-voltage bus A.

[0053] Based on the same general utility model concept, the utility model also protects a battery system, including a filter connector as described in any of the above embodiments.

[0054] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0055] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the prior art can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiments.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A filter connector, characterized in that: include: Connector body, filter circuit, PCB filter board and common mode magnetic ring; The common mode magnetic ring is configured as an annular structure, the annular structure matches the high voltage busbar of the connector body, and is sleeved on the high voltage busbar to form a common mode inductor; The filter circuit is integrated on the PCB filter board, and the filter circuit is electrically connected to the high-voltage bus; The common-mode inductor is used to absorb the common-mode interference on the high-voltage bus, and the filter circuit is used to discharge the common-mode interference on the high-voltage bus.

2. The filter connector according to claim 1, characterized in that: Also includes: case; The connector body, the filter circuit, the PCB filter board and the common mode magnetic ring are all arranged in the housing; The grounding terminal of the filter circuit is electrically connected to the housing through a grounding stud.

3. The filter connector according to claim 2, characterized in that: The housing comprises: a body and a metal cover plate; The connector body, the filter circuit, the PCB filter board and the common mode magnetic ring are all packaged inside the body; The metal cover plate is matched with the body, and the metal cover plate is electrically connected to the grounding end of the filter circuit through a grounding stud.

4. The filter connector according to claim 1, characterized in that: The common mode magnetic ring is made of magnetic material.

5. The filter connector according to claim 4, characterized in that: The common mode magnetic rings are provided with two and are respectively sleeved on the high voltage busbar.

6. The filter connector according to claim 1, characterized in that: Also includes: Leading studs; The connecting studs are fixedly arranged on the high-voltage busbar, and the connecting studs are used to fix the PCB filter board. The filter circuit is electrically connected to the high-voltage busbar through the connecting studs.

7. The filter connector according to claim 1, characterized in that: The filter circuit includes: line capacitance and grounding capacitance; Two ends of the line capacitor are respectively connected to the positive line and the negative line of the high-voltage bus; one end of the grounding capacitor is electrically connected to the high-voltage bus, and the other end of the grounding capacitor is grounded; The line-to-line capacitor is used to suppress differential-mode interference on the high-voltage bus, and the grounding capacitor is used to discharge common-mode interference on the high-voltage bus.

8. The filter connector according to claim 7, characterized in that: The line-to-line capacitor comprises: a first capacitor and a second capacitor; After being connected in parallel, the first capacitor and the second capacitor are connected between the positive line and the negative line of the high-voltage bus.

9. The filter connector according to claim 7, characterized in that: The grounding capacitor includes: a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor; The third capacitor and the fourth capacitor are connected in series and connected between the positive line and the negative line of the high voltage bus; The fourth capacitor and the fifth capacitor are connected in series and connected between the positive line and the negative line of the high voltage bus; The third capacitor, the fourth capacitor, the fifth capacitor and the sixth capacitor are all grounded.

10. A battery system, characterized in that: Comprising the filter connector as described in any one of claims 1-9.

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