Multi-birth contactor and battery system

Abstract

The invention relates to a multiple-birth contactor and a battery system. The multiple-birth contactor comprises a shell; the first contactor comprises a first positive static contact and a first negative static contact; the second contactor comprises a second positive static contact and a second negative static contact; the contact adhesion detection assembly comprises a first adhesion detection unit and a second adhesion detection unit, the first adhesion detection unit comprises a first input, a second input and a first output, the first input is configured to be electrically connected with the first negative static contact, the second input is configured to be electrically connected with the second negative static contact, and the first output is configured to be electrically connected with the second negative static contact; the first output is configured to output a first signal representing a contact adhesion state of the first contactor; the second adhesion detection unit comprises a third input, a fourth input and a second output, the third input is configured to be electrically connected with the first positive static contact, the fourth input is configured to be electrically connected with the second positive static contact, and the second output is configured to be capable of outputting a second signal representing the contact adhesion state of the second contactor.

Description

Technical Field

[0001] The present application relates to the technical field of contactors, and in particular to a multiple contactor and a battery system. Background Art

[0002] With the rapid development of electric vehicles and hybrid vehicles, the importance of power battery technology in improving cost-effectiveness and performance has become increasingly prominent. In these electric vehicles, high-voltage contactors (or high-voltage relays) are key components for maintaining the safety of high-voltage circuits, and their performance is directly related to the safety and reliability of electric vehicles. High-voltage contactors not only need to have high voltage tolerance, load tolerance and impact resistance, but also need to have excellent arc extinguishing and breaking capabilities.

[0003] However, a major failure mode faced by high-voltage contactors is contact adhesion or contact sticking. In a high-voltage environment, contact adhesion may cause the contactor to fail to disconnect normally. If this condition is not detected in time, it may cause serious safety accidents. For example, under the working conditions of the power battery, its output voltage may reach hundreds of volts, and the contactor is used to control the on and off of the battery output. Under certain special operating or environmental conditions, the contacts of the contactor are prone to adhesion, which not only leads to the risk of high-voltage and high-current shocks to the back-end components, but may also cause the fuse to burn out, which in turn leads to more serious safety hazards.

[0004] At present, the adhesion detection of high-voltage contactors mainly relies on the hardware voltage sampling technology in the battery management system. The battery management system compares the voltages at the front and rear ends of the contactor to determine its adhesion state. Although adhesion detection methods and systems for single contactors have been proposed in the prior art, such as using a voltage sampling unit and a logic judgment unit to monitor a single contactor, in actual applications, these methods face the problems of complex circuit design, non-compact structure and rising manufacturing costs when there are multiple contactors. At the same time, the working states of different contactors affect each other, and it is difficult for existing detection schemes to accurately determine the true condition of each contactor.

[0005] Therefore, those skilled in the art are in urgent need of a reliable and efficient adhesion detection solution for multiple contactors. Summary of the invention

[0006] Therefore, the purpose of the present application is to provide a multiple contactor that can overcome at least one defect in the prior art. This can achieve a beneficial technical effect, that is, the multiple contactor with integrated contact adhesion detection function of the present application can achieve compact integration of multiple discrete contactors while ensuring the reliability and efficiency of contact adhesion detection of multiple contactors. In addition, the present application also relates to a related battery system.

[0007] In order to achieve the above-mentioned objectives, the first aspect of the present application provides a multiple contactor, which comprises: a shell; a first contactor, comprising a moving contact in the shell and a first positive static contact and a first negative static contact partially exposed from the shell; a second contactor, comprising a moving contact in the shell and a second positive static contact and a second negative static contact partially exposed from the shell; and a contact adhesion detection assembly, comprising a first adhesion detection unit provided to the first contactor and a second adhesion detection unit provided to the second contactor, wherein the first adhesion detection unit comprises a first input, a second input and a first output, the first input is configured to be electrically connected to the first negative static contact, the second input is configured to be electrically connected to the second negative static contact, and the first output is configured to output a first signal representing the contact adhesion state of the first contactor; wherein the second adhesion detection unit comprises a third input, a fourth input and a second output, the third input is configured to be electrically connected to the first positive static contact, the fourth input is configured to be electrically connected to the second positive static contact, and the second output is configured to output a second signal representing the contact adhesion state of the second contactor.

[0008] In some embodiments, the contact adhesion detection component includes a circuit board and at least one electrical connection component, wherein a first adhesion detection unit and a second adhesion detection unit are integrated on the circuit board, wherein the at least one electrical connection component is configured to establish a first electrical connection between the first input and the first negative static contact, a second electrical connection between the second input and the second negative static contact, a third electrical connection between the third input and the first positive static contact, and a fourth electrical connection between the fourth input and the second positive static contact.

[0009] In some embodiments, the multiple contactor further includes a third contactor, wherein the third contactor includes a moving contact in a housing and a third positive stationary contact and a third negative stationary contact partially exposed from the housing.

[0010] In some embodiments, the contact adhesion detection assembly also includes a third adhesion detection unit provided to the third contactor, wherein the third adhesion detection unit includes a fifth input, a sixth input and a third output, the fifth input is configured to be electrically connected to the third negative static contact, the sixth input is configured to be electrically connected to the second negative static contact, and the third output is configured to output a third signal characterizing the contact adhesion state of the third contactor.

[0011] In some embodiments, the first contactor is configured to be applied to a positive contactor in a battery feed circuit, the second contactor is configured to be applied to a negative contactor in a battery feed circuit, and the third contactor is configured to be applied to a pre-charging contactor in a battery pre-charging circuit, wherein the battery pre-charging circuit includes a pre-charging contactor and a pre-charging resistor connected in series, and the pre-charging contactor and the pre-charging resistor are connected in parallel with the positive contactor.

[0012] In some embodiments, the multiple contactors include multiple pairs of contactors, each pair of contactors consisting of a first contactor and a second contactor.

[0013] In some embodiments, the multiple contactors include: a first pair of contactors, the first pair of contactors including a positive contactor applied in a battery feed circuit as a first contactor and a negative contactor applied in the battery feed circuit as a second contactor; and / or a second pair of contactors, the second pair of contactors including a positive contactor applied in a DC charging circuit as a first contactor and a negative contactor applied in a DC charging circuit as a second contactor; and / or a third pair of contactors, the third pair of contactors including a positive contactor applied in an AC charging circuit as a first contactor and a negative contactor applied in an AC charging circuit as a second contactor.

[0014] In some embodiments, the first adhesion detection unit includes a first input side circuit, a first electrical isolation module and a first output side circuit, wherein the first input side circuit is configured to adjust a first input voltage falling on the first input and the second input, and provide the adjusted first input voltage to the first electrical isolation module, wherein the first electrical isolation module is configured to provide a first output voltage to the first output side circuit based on the adjusted first input voltage, wherein the first output side circuit is configured to adjust the first output voltage, and output the adjusted first output voltage as a first signal characterizing the contact adhesion state of the first contactor.

[0015] In some embodiments, the second adhesion detection unit includes a second input side circuit, a second electrical isolation module, and a second output side circuit, wherein the second input side circuit is configured to adjust the second input voltage falling on the third input and the fourth input, and provide the adjusted second input voltage to the second electrical isolation module, wherein the second electrical isolation module is configured to provide a second output voltage to the second output side circuit based on the adjusted second input voltage, wherein the second output side circuit is configured to adjust the second output voltage, and output the adjusted second output voltage as a second signal characterizing the contact adhesion state of the second contactor.

[0016] In some embodiments, the first input side circuit includes a first resistor network configured to adjust a first input voltage falling on the first input and the second input, and the second input side circuit includes a second resistor network configured to adjust a second input voltage falling on the third input and the fourth input.

[0017] In some embodiments, the first electrical isolation module and the second electrical isolation module are respectively configured as an optical coupling isolation module, a capacitive isolation module or an electromagnetic isolation module.

[0018] In some embodiments, the first output side circuit includes a third resistor network configured to adjust the first output voltage, and the second output side circuit includes a fourth resistor network configured to adjust the second output voltage.

[0019] In some embodiments, the at least one electrical connection component includes at least one flexible circuit board element, which is at least partially mounted on a first surface of the shell, and the first positive static contact and the first negative static contact of the first contactor and the second positive static contact and the second negative static contact of the second contactor are exposed from the first surface of the shell.

[0020] In some embodiments, the circuit board is at least partially mounted at a second surface of the housing, the second surface being perpendicular to the first surface, and the at least one flexible circuit board element and the circuit board are electrically connected to each other.

[0021] In some embodiments, the at least one electrical connection component also includes a first conductive contact element that is in contact with and conductive to the first negative static contact, a second conductive contact element that is in contact with and conductive to the second negative static contact, a third conductive contact element that is in contact with and conductive to the first positive static contact, and a fourth conductive contact element that is in contact with and conductive to the second positive static contact.

[0022] In some embodiments, the at least one flexible circuit board element includes a first electrical connection portion electrically connected to the first conductive contact element, a second electrical connection portion electrically connected to the second conductive contact element, a third electrical connection portion electrically connected to the third conductive contact element, and a fourth electrical connection portion electrically connected to the fourth conductive contact element.

[0023] In some embodiments, each of the first electrical connection portion, the second electrical connection portion, the third electrical connection portion, and the fourth electrical connection portion respectively includes an arc-shaped abutment surface, a through hole for the protrusion of the corresponding conductive contact element to pass through, and a soldering pad arranged around the through hole, wherein the protrusion of the corresponding conductive contact element is configured to be welded to each other with the corresponding electrical connection portion at the soldering pad.

[0024] In some embodiments, the first conductive contact element includes a first arcuate contact surface configured to snap onto an outer peripheral wall of the first negative stationary contact.

[0025] In some embodiments, the second conductive contact element includes a second arc-shaped contact surface, and the second arc-shaped contact surface is configured to snap onto the outer peripheral wall of the second negative stationary contact.

[0026] In some embodiments, the third conductive contact element includes a third arcuate contact surface, and the third arcuate contact surface is configured to snap onto the outer peripheral wall of the first positive static contact.

[0027] In some embodiments, the fourth conductive contact element includes a fourth arcuate contact surface, and the fourth arcuate contact surface is configured to be snapped onto the outer peripheral wall of the second positive static contact.

[0028] In order to achieve the above-mentioned objectives, a second aspect of the present application provides a battery system, which includes a battery, a battery distribution unit, and a battery management system, wherein the battery distribution unit includes a multiple contactor according to some embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present invention and, together with the description, serve to explain the principles of the present invention.

[0030] Figure 1 shows a simplified schematic block diagram of a battery system;

[0031] Figure 2 An exemplary perspective view of a multiple-birth contactor according to some embodiments of the present application is shown;

[0032] Figure 3 A schematic block diagram of a battery system according to some embodiments of the present application is shown;

[0033] Figure 4 A schematic block diagram of a battery system according to some further expanded embodiments of the present application is shown;

[0034] Figure 5 and Figure 6 Some schematic diagrams of contact adhesion detection components of multiple contactors according to some embodiments of the present application are shown;

[0035] Figure 7 A schematic block diagram of a adhesion detection unit of a multiple contactor according to some embodiments of the present application is shown.

[0036] Note that in the embodiments described below, sometimes the same reference numerals are used in common between different drawings to represent the same parts or parts with the same functions, and their repeated descriptions are omitted. In some cases, similar numbers and letters are used to represent similar items, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0037] For ease of understanding, the positions, sizes, and ranges of various structures shown in the drawings and the like may not represent actual positions, sizes, and ranges, etc. Therefore, the present invention is not limited to the positions, sizes, and ranges disclosed in the drawings and the like. DETAILED DESCRIPTION

[0038] The present application will be described below with reference to the accompanying drawings, wherein the accompanying drawings illustrate several embodiments of the present application. However, it should be understood that the present application can be presented in a variety of different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure of the present application more complete and fully explain the scope of protection of the present application to those skilled in the art. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide more additional embodiments.

[0039] In the various embodiments described in different ways, the same elements are assigned the same reference numerals or the same element names, wherein the disclosure contained in the entire specification can be transferred to the elements assigned the same reference numerals or the same element names according to the meaning. In addition, in various embodiments, the number, implementation and / or arrangement structure of the elements are not limited to the examples shown, but other numbers, implementations and / or arrangements can be selected according to actual needs.

[0040] As used herein, spatial relational terms such as "upper," "lower," "left," "right," "front," "rear," "higher," "lower," etc. may describe the relationship of one feature to another feature in the accompanying drawings. It should be understood that the spatial relational terms encompass different orientations of the device in use or operation in addition to the orientation shown in the accompanying drawings. For example, features previously described as being "below" other features may now be described as being "above" the other features when the device in the accompanying drawings is turned over. The device may also be otherwise oriented (rotated 90 degrees or in other orientations), and the relative spatial relationships will be interpreted accordingly.

[0041] Herein, the term "A or B" includes "A and B" and "A or B" rather than exclusively including only "A" or only "B", unless specifically stated otherwise.

[0042] In this document, the terms "illustrative" or "exemplary" mean "used as an example, instance or illustration" rather than as a "model" to be exactly copied. Any implementation described as an example herein is not necessarily to be interpreted as preferred or advantageous over other implementations. Moreover, this application is not limited by any expressed or implied theory given in the above technical field, background technology, invention content or detailed description.

[0043] As used herein, the term "substantially" is intended to include any minor variations due to design or manufacturing defects, device or component tolerances, environmental influences, and / or other factors.

[0044] In addition, the terms "first", "second" and the like may also be used herein for reference purposes only, and thus are not intended to be limiting. For example, the terms "first", "second" and other such numerical terms referring to structures or elements do not imply a sequence or order unless the context clearly indicates otherwise.

[0045] Some embodiments of the present application will now be described in more detail with reference to the accompanying drawings.

[0046] like Figure 1 As shown, a simplified schematic block diagram of a battery system 100 is shown. Figure 1 As shown, the battery system 100 may include a battery 1, a battery distribution unit 2, and a battery management system 3. In some embodiments, the battery distribution unit 2 and the battery management system 3 may be configured as independent modules. In some embodiments, the battery distribution unit 2 and the battery management system 3 may be configured as an integrated module.

[0047] In an electric vehicle, the battery 1 (also referred to as a power battery) may have an operating voltage of, for example, 100 V to 1000 V, in particular 400 V to 800 V, and is configured to supply power to an electric drive system.

[0048] The battery distribution unit 2 (also called a battery disconnecting unit) can be configured to control the on and off of the charging circuit and the feeding circuit of the battery. To this end, the battery distribution unit 2 can include a contactor or a relay applied to the corresponding battery charging circuit and the battery feeding circuit. It should be understood that the contactor of the present application can also be called a relay, which can be understood in this article without distinction.

[0049] In some embodiments, the battery distribution unit 2 may include a first pair of contactors, which include a positive contactor and a negative contactor applied to a battery feed circuit. In addition, the battery distribution unit may also include a pre-charge contactor 23 applied to a battery pre-charge circuit. The main function of the battery pre-charge circuit is to charge the pre-charge capacitor before the power battery is started to reduce the impact current generated when the power battery is started. This process not only helps to improve the starting stability of the power battery, but also effectively protects the electronic equipment in the power battery system 100 from being damaged by current shocks. The pre-charge contactor 23, more precisely the battery pre-charge circuit can be, for example, connected in parallel to the positive contactor of the battery feed circuit. The battery pre-charge circuit can generally include a pre-charge contactor 23 and a pre-charge resistor R connected in series.

[0050] Additionally or alternatively, the battery power distribution unit 2 may include a second pair of contactors, wherein the second pair of contactors includes a positive contactor and a negative contactor applied in a DC charging circuit or a fast charging circuit.

[0051] Additionally or alternatively, the battery power distribution unit 2 may include a third pair of contactors, wherein the third pair of contactors includes a positive contactor and a negative contactor applied in an AC charging circuit or a slow charging circuit.

[0052] A major failure mode faced by these contactors is contact sticking or contact adhesion. In a high voltage environment, contact adhesion may prevent the contactor from disconnecting normally. If this condition is not detected in time, it may cause serious safety accidents. For example, under the working conditions of the power battery, its output voltage may reach hundreds of volts, and the contactor is used to control the on and off of the battery output. Under certain special operating or environmental conditions, the contacts of the contactor are prone to adhesion, which not only puts the back-end components at risk of high voltage and high current shocks, but may also cause the fuse to burn out, which in turn causes more serious safety hazards.

[0053] The present application proposes a multiple contactor with an integrated contact adhesion detection function, which ensures the reliability and efficiency of contact adhesion detection of multiple contactors while realizing the compact integration of multiple discrete contactors. In some embodiments, the multiple contactor can integrate the first pair of contactors used in the battery feed circuit, and / or the pre-charging contactor, and / or the second pair of contactors used in the DC charging circuit, and / or the third pair of contactors used in the AC charging circuit introduced above. In other words, the multiple contactor can be configured as a twin contactor, a triplet contactor, a quadruple contactor, a quintuplet contactor, a sextuplet contactor, a septuplet contactor, and the like.

[0054] Figure 2 FIG. 2 shows an exemplary stereogram of a multiple contactor 50 according to some embodiments of the present application. Figure 2 As shown, the multiple contactor 50 may include a housing 10, a pair of contactors 21, 22 (see Figure 3 and 4 ), and a contact adhesion detection assembly 30. In the illustrated embodiment, the multiple contactor 50 includes only one pair of contactors, so the multiple contactor 50 can also be called a twin contactor. It should be understood that in other embodiments, the multiple contactor 50 can include a larger number of contactors, and is not limited to the illustrated embodiment.

[0055] The twin contactor may include a first contactor 21 and a second contactor 22. The first contactor 21 may include a moving contact in the housing 10 and a first positive static contact 211 and a first negative static contact 212 partially exposed from the housing 10. The switching function of the first contactor 21 may be realized by controlling the movement of the moving contact to cause the first positive static contact 211 and the first negative static contact 212 to be turned on and off. The second contactor 22 may include a moving contact in the housing 10 and a second positive static contact 221 and a second negative static contact 222 partially exposed from the housing 10. The switching function of the second contactor 22 may be realized by controlling the movement of the moving contact to cause the second positive static contact 221 and the second negative static contact 222 to be turned on and off. In some embodiments, this pair of contactors may be configured as the first pair of contactors mentioned above for use in a battery feed circuit. In some embodiments, this pair of contactors may be configured as the second pair of contactors mentioned above for use in a DC charging circuit. In some embodiments, this pair of contactors may be configured as the third pair of contactors mentioned above for use in an AC charging circuit.

[0056] Figure 3 1 shows a schematic block diagram of a battery system 100 according to some embodiments of the present application. Figure 3 As shown, the battery system 100 may include a battery, a battery distribution unit, and a battery management system. The battery distribution unit may include at least one Figure 2 Multiple contactors 50 are shown.

[0057] The contact adhesion detection assembly 30 of the multiple contactor 50 may include a first adhesion detection unit 31 provided to the first contactor 21 and a second adhesion detection unit 32 provided to the second contactor 22. The first adhesion detection unit 31 may include a first input 311, a second input 312 and a first output 313, wherein the first input 311 is configured to be electrically connected to the first negative static contact 212, the second input 312 is configured to be electrically connected to the second negative static contact 222 (the second negative static contact 222 may be electrically connected to the negative pole of the battery), and the first output 313 is configured to output a first signal representing the contact adhesion state of the first contactor 21. The second adhesion detection unit 32 may include a third input 321, a fourth input 322 and a second output 323, the third input 321 is configured to be electrically connected to the first positive static contact 211 (the first positive static contact 211 may be electrically connected to the positive pole of the battery), the fourth input 322 is configured to be electrically connected to the second positive static contact 221, and the second output 323 is configured to output a second signal representing the contact adhesion state of the second contactor 22.

[0058] The battery management system 3 may be configured to be electrically connected to the first adhesion detection unit 31 and the second adhesion detection unit 32 of the contact adhesion detection assembly 30, so as to receive a first signal representing the contact adhesion state of the first contactor 21 from the first adhesion detection unit 31 and receive a second signal representing the contact adhesion state of the second contactor 22 from the second adhesion detection unit 32. It should be understood that the electrical connection between the battery management system 3 and the contact adhesion detection assembly 30 may be achieved by wired and / or wireless connection, which will not be described in detail herein.

[0059] The battery management system 3 can be configured to find out the contact adhesion state of the first contactor 21 based on the first signal and take corresponding measures based on this; and to find out the contact adhesion state of the second contactor 22 based on the second signal and take corresponding measures based on this. It should be understood that when performing contact adhesion detection, the first contactor 21 and the second contactor 22 should be in a theoretical disconnection state. That is, the battery management system 3 can be configured to apply a disconnection signal to the first contactor 21 and the second contactor 22 to promote the movement of the moving contact of the first contactor 21 to cause the disconnection between the first positive static contact 211 and the first negative static contact 212 and to promote the movement of the moving contact of the second contactor 22 to cause the disconnection between the second positive static contact 221 and the second negative static contact 222.

[0060] It can be seen that the contact adhesion detection function of the multiple contactor 50 makes full use of the favorable conditions of integrating multiple contactors together, and simplifies the circuit complexity of contact adhesion detection. When the adhesion detection of the first contactor 21 is performed, the second negative static contact 222 of the second contactor 22 is used to maintain electrical connection with the negative pole of the battery, thereby forming a closed loop when contact adhesion occurs. When contact adhesion occurs, the first input 311 should be applied with a high potential, and the second input 312 should be applied with a low potential. When contact adhesion does not occur, the first input 311 should be applied with a low potential, and the second input 312 should be applied with a low potential. Thus, when contact adhesion occurs, the input voltage between the first input 311 and the second input 312 of the first adhesion detection unit 31 should be higher than a predetermined voltage threshold. When contact adhesion does not occur, the input voltage between the first input 311 and the second input 312 of the first adhesion detection unit 31 should be lower than a predetermined voltage threshold. Similarly, when the adhesion detection for the second contactor 22 is performed, the first positive static contact 211 of the first contactor 21 is used to maintain electrical connection with the positive electrode of the battery, thereby forming a closed loop when contact adhesion occurs. When contact adhesion occurs, the third input 321 should be applied with a high potential, and the fourth input 322 should be applied with a low potential. When contact adhesion does not occur, the third input 321 should be applied with a high potential, and the fourth input 322 is in a potential floating state. Thus, when contact adhesion occurs, the input voltage between the third input 321 and the fourth input 322 of the second adhesion detection unit 32 should be higher than a predetermined voltage threshold. When contact adhesion does not occur, the input voltage between the third input 321 and the fourth input 322 of the second adhesion detection unit 32 should be lower than a predetermined voltage threshold. Therefore, the multiple contactor 50 of the present invention can efficiently and compactly realize the integration of multiple contactors and the contact adhesion detection function for multiple contactors.

[0061] Figure 4 FIG. 1 shows a schematic block diagram of a battery system 100 according to some further embodiments of the present application. Figure 4 As shown, the battery system 100 may include a battery 1, a battery distribution unit 2, and a battery management system 3. The battery distribution unit 2 may include a multiple contactor 50 according to some embodiments of the present application.

[0062] In some embodiments, the multiple contactors 50 may include a first pair of contactors, the first pair of contactors including a positive contactor applied to a battery feed circuit as a first contactor 21 and a negative contactor applied to a battery feed circuit as a second contactor 22. Additionally or alternatively, the multiple contactors 50 may include a second pair of contactors, the second pair of contactors including a positive contactor applied to a DC charging circuit as a first contactor 21 and a negative contactor applied to a DC charging circuit as a second contactor 22. Additionally or alternatively, the multiple contactors 50 may include a third pair of contactors, the third pair of contactors including a positive contactor applied to an AC charging circuit as a first contactor 21 and a negative contactor applied to an AC charging circuit as a second contactor 22. It should be understood that the first contactors 21 and the second contactors 22 involved in each pair of contactors and their first adhesion detection units 31 and second adhesion detection units 32 may refer to the embodiments described in accordance with the present invention. Figure 3 The contents introduced in the embodiments will not be repeated here.

[0063] In a further improved embodiment, the battery distribution unit 2 may also include a third contactor, which may be configured, for example, as a pre-charge contactor 23 applied to a battery pre-charge circuit. The contact adhesion detection assembly 30 may also include a third adhesion detection unit provided to the third contactor. The third adhesion detection unit may include a fifth input, a sixth input, and a third output, wherein the fifth input is configured to be electrically connected to the third negative static contact, the sixth input is configured to be electrically connected to the second negative static contact 222, and the third output is configured to output a third signal representing the contact adhesion state of the third contactor. It can be seen that the contact adhesion detection function of the multiple contactor 50 makes full use of the favorable conditions of integrating multiple contactors together, and simplifies the circuit complexity of the contact adhesion detection. When the adhesion detection of the third contactor is performed, the second negative static contact 222 of the second contactor 22 is electrically connected to the negative pole of the battery, thereby forming a closed loop when contact adhesion occurs. When contact adhesion occurs, the fifth input should be applied with a high potential, and the sixth input should be applied with a low potential. When contact adhesion does not occur, the fifth input should be applied with a low potential, and the sixth input should be applied with a low potential. Thus, when contact adhesion occurs, the input voltage between the fifth input and the sixth input of the third adhesion detection unit should be higher than a predetermined voltage threshold. When contact adhesion does not occur, the input voltage between the fifth input and the sixth input of the third adhesion detection unit should be lower than a predetermined voltage threshold.

[0064] Reference Figure 5 and 6 , further illustrating some schematic diagrams of the contact adhesion detection assembly 30 of the multiple contactor 50 according to some embodiments of the present application. Figure 1 , 5 As shown in Figures 6 and 7, the contact adhesion detection component 30 may include a circuit board 34, such as a printed circuit board and at least one electrical connection component 36. A first adhesion detection unit 31 and a second adhesion detection unit 32 may be integrated on the circuit board 34. When the multiple contactor 50 includes multiple pairs of contactors, multiple pairs of adhesion detection units may be integrated on the circuit board 34 accordingly. In some embodiments, the at least one electrical connection component 36 may be configured to establish a first electrical connection between a first input 311 of the first adhesion detection unit 31 and a first negative static contact 212, a second electrical connection between a second input 312 of the first adhesion detection unit 31 and a second negative static contact 222, a third electrical connection between a third input 321 of the second adhesion detection unit 32 and a first positive static contact 211, and a fourth electrical connection between a fourth input 322 of the second adhesion detection unit 32 and a second positive static contact 221.

[0065] In some embodiments, the at least one electrical connection component 36 may include at least one flexible circuit board element. Figure 1 As shown, the at least one flexible circuit board element may be at least partially mounted on the first surface of the housing 10, and the first positive static contact 211 and the first negative static contact 212 of the first contactor 21 and the second positive static contact 221 and the second negative static contact 222 of the second contactor 22 are exposed from the first surface of the housing 10. In some embodiments, the circuit board 34 may be at least partially mounted on the second surface of the housing 10, and the second surface may be substantially perpendicular to the first surface. Advantageously, the at least one flexible circuit board element may be integrated with the circuit board 34, thereby achieving efficient and reliable electrical connection between the flexible circuit board element and the corresponding adhesion detection unit on the circuit board 34. Advantageously, as Figure 6 It is schematically shown that a first electrical connection between the first input 311 and the first negative static contact 212 can be implemented based on a first printed trace on a flexible circuit board element, a second electrical connection between the second input 312 and the second negative static contact 222 can be implemented based on a second printed trace on the flexible circuit board element, a third electrical connection between the third input 321 and the first positive static contact 211 can be implemented based on a third printed trace on the flexible circuit board element, and a fourth electrical connection between the fourth input 322 and the second positive static contact 221 can be implemented based on a fourth printed trace on the flexible circuit board element.

[0066] It should be understood that the arrangement position and arrangement mode of the circuit board 34 and the electrical connection assembly 36 can be flexibly designed and are not limited to the illustrated embodiment. For example, at least a portion of the circuit board 34 and / or the electrical connection assembly 36 can be arranged inside the housing 10 or at other surfaces or other positions. In addition, it should be understood that the at least one electrical connection assembly 36 can also be configured as other forms of electrical connectors, such as cables or electrical conductor structures, which should not be understood restrictively.

[0067] Reference Figure 5 and 6 The at least one electrical connection component 36 may also include a first conductive contact element 361 that is in contact with and conductive to the first negative static contact 212, a second conductive contact element 362 that is in contact with and conductive to the second negative static contact 222, a third conductive contact element 363 that is in contact with and conductive to the first positive static contact 211, and a fourth conductive contact element 364 that is in contact with and conductive to the second positive static contact 221. Thus, the first electrical connection between the first input 311 and the first negative static contact 212 can be realized based on the first printed trace and the first conductive contact element 361 on the flexible circuit board element, the second electrical connection between the second input 312 and the second negative static contact 222 can be realized based on the second printed trace and the second conductive contact element 362 on the flexible circuit board element, the third electrical connection between the third input 321 and the first positive static contact 211 can be realized based on the third printed trace and the third conductive contact element 363 on the flexible circuit board element, and the fourth electrical connection between the fourth input 322 and the second positive static contact 221 can be realized based on the fourth printed trace and the fourth conductive contact element 364 on the flexible circuit board element.

[0068] In some embodiments, the first conductive contact element 361 may include a first arcuate contact surface, which is configured to be snapped, especially interference-fitted, onto the outer peripheral wall of the first negative static contact 212. The second conductive contact element 362 includes a second arcuate contact surface, which is configured to be snapped, especially interference-fitted, onto the outer peripheral wall of the second negative static contact 222. The third conductive contact element 363 includes a third arcuate contact surface, which is configured to be snapped, especially interference-fitted, onto the outer peripheral wall of the first positive static contact 211. The fourth conductive contact element 364 includes a fourth arcuate contact surface, which is configured to be snapped, especially interference-fitted, onto the outer peripheral wall of the second positive static contact 221. Advantageously, the corresponding conductive contact element may surround 50%, 60%, 80% or more than 90% of the outer peripheral wall of the corresponding static contact to achieve a large area and good electrical contact. In some embodiments, the corresponding conductive contact element may be configured as an annular contact element.

[0069] In order to realize the electrical connection between the flexible circuit board element, more precisely the corresponding printed trace on the flexible circuit board element and the corresponding stationary contact, the at least one flexible circuit board element may include a first electrical connection portion 381 electrically connected to the first conductive contact element 361, a second electrical connection portion 382 electrically connected to the second conductive contact element 362, a third electrical connection portion 383 electrically connected to the third conductive contact element 363, and a fourth electrical connection portion 384 electrically connected to the fourth conductive contact element 364. In some embodiments, each of the first electrical connection portion 381, the second electrical connection portion 382, ​​the third electrical connection portion 383, and the fourth electrical connection portion 384 may respectively include an arc-shaped abutment surface, a through hole for the protrusion of the corresponding conductive contact element to pass through, and a pad arranged around the through hole, wherein the protrusion of the corresponding conductive contact element is configured to be welded to each other at the pad with the corresponding electrical connection portion. Advantageously, the protrusion of the corresponding conductive contact element may be configured to be interference-fitted into the corresponding through hole so as to realize a reliable electrical connection and a stable assembly structure. In some embodiments, the arcuate abutment surface of each electrical connection portion can be abutted against the outer peripheral wall of the corresponding static contact, thereby achieving a stable assembly structure. In some embodiments, the arcuate abutment surface of each electrical connection portion can be arranged above the arcuate contact surface of the corresponding conductive contact element.

[0070] Reference Figure 7 , further illustrating a schematic block diagram of an adhesion detection unit of a multiple contactor 50 according to some embodiments of the present application.

[0071] like Figure 7 As shown, the first adhesion detection unit 31 may include a first input side circuit 41, a first electrical isolation module 51 and a first output side circuit 61. The first input side circuit 41 may be configured to adjust the first input voltage falling on the first input 311 and the second input 312, and provide the adjusted first input voltage to the first electrical isolation module 51. The first electrical isolation module 51 may be configured to provide a first output voltage to the first output side circuit 61 based on the adjusted first input voltage. The first output side circuit 61 is configured to adjust the first output voltage, and use the adjusted first output voltage as a first output 313 characterizing the contact adhesion state of the first contactor 21. As the first output 313 characterizing the contact adhesion state of the first contactor 21, the output value of the first output side circuit 61 can be either an analog quantity, such as a voltage value, or a digital quantity, such as a digital signal of a communication bus such as CAN or LIN.

[0072] Similarly, the second adhesion detection unit 32 may include a second input side circuit 42, a second electrical isolation module 52, and a second output side circuit 62. The second input side circuit 42 may be configured to adjust the second input voltage falling on the third input 321 and the fourth input 322, and provide the adjusted second input voltage to the second electrical isolation module 52. The second electrical isolation module 52 may be configured to provide a second output voltage to the second output side circuit 62 based on the adjusted second input voltage. The second output side circuit 62 may be configured to adjust the second output voltage, and use the adjusted second output voltage as a second output 323 characterizing the contact adhesion state of the second contactor 22. As the second output 323 characterizing the contact adhesion state of the second contactor 22, the output value of the second output side circuit 62 may be an analog quantity, such as a voltage value, or a digital quantity, such as a digital signal of a communication bus such as CAN or LIN.

[0073] In some embodiments, the first input side circuit 41 may include a first resistor network, which may be configured to adjust a first input voltage falling on the first input 311 and the second input 312, and the second input side circuit 42 includes a second resistor network, which is configured to adjust a second input voltage falling on the third input 321 and the fourth input 322.

[0074] In some embodiments, the first electrical isolation module 51 and the second electrical isolation module 52 can be respectively configured as an optical coupling isolation module, a capacitive isolation module or an electromagnetic isolation module.

[0075] In some embodiments, the first output side circuit 61 includes a third resistor network configured to adjust the first output voltage, and the second output side circuit 62 includes a fourth resistor network configured to adjust the second output voltage.

[0076] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0077] The features or feature combinations mentioned above in the specification and drawings may be used in any combination or alone as long as they are meaningful within the scope of the present application and do not contradict each other.

[0078] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent transformations made by using the contents of the present application specification and drawings under the inventive concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.

Claims

1. Multiple birth contactor, characterized in that: The multiple birth contactor comprises: case; A first contactor includes a moving contact in a housing and a first positive stationary contact and a first negative stationary contact partially exposed from the housing; A second contactor includes a moving contact in the housing and a second positive stationary contact and a second negative stationary contact partially exposed from the housing; and The contact adhesion detection assembly comprises a first adhesion detection unit provided for the first contactor and a second adhesion detection unit provided for the second contactor. Wherein, the first adhesion detection unit comprises a first input, a second input and a first output, the first input is configured to be electrically connected to the first negative static contact, the second input is configured to be electrically connected to the second negative static contact, and the first output is configured to output a first signal representing a contact adhesion state of the first contactor; Wherein, the second adhesion detection unit includes a third input, a fourth input and a second output, the third input is configured to be electrically connected to the first positive static contact, the fourth input is configured to be electrically connected to the second positive static contact, and the second output is configured to output a second signal representing the contact adhesion state of the second contactor.

2. The multiple birth contactor according to claim 1, characterized in that: The contact adhesion detection component includes a circuit board and at least one electrical connection component, wherein a first adhesion detection unit and a second adhesion detection unit are integrated on the circuit board, wherein the at least one electrical connection component is configured to establish a first electrical connection between a first input and a first negative static contact, a second electrical connection between a second input and a second negative static contact, a third electrical connection between a third input and a first positive static contact, and a fourth electrical connection between a fourth input and a second positive static contact.

3. The multiple birth contactor according to claim 1, characterized in that: The multiple contactor further includes a third contactor, wherein the third contactor includes a moving contact in the housing and a third positive static contact and a third negative static contact partially exposed from the housing. Among them, the contact adhesion detection component also includes a third adhesion detection unit equipped for the third contactor, wherein the third adhesion detection unit includes a fifth input, a sixth input and a third output, the fifth input is configured to be electrically connected to the third negative static contact, the sixth input is configured to be electrically connected to the second negative static contact, and the third output is configured to output a third signal representing the contact adhesion state of the third contactor.

4. The multiple birth contactor according to claim 3, characterized in that: The first contactor is configured to be applied to a positive contactor in a battery feed circuit, the second contactor is configured to be applied to a negative contactor in a battery feed circuit, and the third contactor is configured to be applied to a pre-charging contactor in a battery pre-charging circuit, wherein the battery pre-charging circuit includes a pre-charging contactor and a pre-charging resistor connected in series, and the pre-charging contactor and the pre-charging resistor are connected in parallel with the positive contactor.

5. The multiple birth contactor according to any one of claims 1 to 4, characterized in that: The multiple contactors include multiple pairs of contactors, each pair of contactors consists of a first contactor and a second contactor, wherein the multiple contactors include: a first pair of contactors, the first pair of contactors comprising a positive contactor as a first contactor applied in a battery feed circuit and a negative contactor as a second contactor applied in the battery feed circuit; and / or A second pair of contactors, the second pair of contactors comprising a positive contactor applied in a DC charging circuit as a first contactor and a negative contactor applied in a DC charging circuit as a second contactor; and / or A third pair of contactors includes a positive contactor used in an AC charging circuit as a first contactor and a negative contactor used in an AC charging circuit as a second contactor.

6. The multiple birth contactor according to any one of claims 1 to 4, characterized in that: The first adhesion detection unit includes a first input side circuit, a first electrical isolation module and a first output side circuit, wherein the first input side circuit is configured to adjust a first input voltage falling on the first input and the second input, and provide the adjusted first input voltage to the first electrical isolation module, wherein the first electrical isolation module is configured to provide a first output voltage to the first output side circuit based on the adjusted first input voltage, wherein the first output side circuit is configured to adjust the first output voltage, and output the adjusted first output voltage as a first signal representing a contact adhesion state of the first contactor; and The second adhesion detection unit includes a second input side circuit, a second electrical isolation module and a second output side circuit, wherein the second input side circuit is configured to adjust a second input voltage falling on a third input and a fourth input, and provide the adjusted second input voltage to the second electrical isolation module, wherein the second electrical isolation module is configured to provide a second output voltage to the second output side circuit based on the adjusted second input voltage, wherein the second output side circuit is configured to adjust the second output voltage, and output the adjusted second output voltage as a second signal characterizing the contact adhesion state of the second contactor.

7. The multiple birth contactor according to claim 6, characterized in that: The first input side circuit includes a first resistor network configured to adjust a first input voltage falling on the first input and the second input, and the second input side circuit includes a second resistor network configured to adjust a second input voltage falling on the third input and the fourth input; The first electrical isolation module and the second electrical isolation module are respectively configured as an optical coupling isolation module, a capacitive isolation module or an electromagnetic isolation module; The first output side circuit includes a third resistor network configured to adjust the first output voltage, and the second output side circuit includes a fourth resistor network configured to adjust the second output voltage.

8. The multiple birth contactor according to claim 2, characterized in that: The at least one electrical connection component includes at least one flexible circuit board element, which is at least partially mounted on a first surface of the shell, and the first positive static contact and the first negative static contact of the first contactor and the second positive static contact and the second negative static contact of the second contactor are exposed from the first surface of the shell.

9. The multiple birth contactor according to claim 8, characterized in that: The circuit board is at least partially mounted at a second surface of the housing, the second surface being perpendicular to the first surface, and the at least one flexible circuit board element and the circuit board are electrically connected to each other.

10. The multiple birth contactor according to claim 8 or 9, characterized in that: The at least one electrical connection assembly further includes a first conductive contact element that contacts and conducts with the first negative static contact, a second conductive contact element that contacts and conducts with the second negative static contact, a third conductive contact element that contacts and conducts with the first positive static contact, and a fourth conductive contact element that contacts and conducts with the second positive static contact, and The at least one flexible circuit board element includes a first electrical connection portion electrically connected to the first conductive contact element, a second electrical connection portion electrically connected to the second conductive contact element, a third electrical connection portion electrically connected to the third conductive contact element, and a fourth electrical connection portion electrically connected to the fourth conductive contact element.

11. The multiple birth contactor according to claim 10, characterized in that: Each of the first electrical connection part, the second electrical connection part, the third electrical connection part, and the fourth electrical connection part respectively includes an arc-shaped abutment surface, a through hole for the protrusion of the corresponding conductive contact element to pass through, and a soldering pad arranged around the through hole, wherein the protrusion of the corresponding conductive contact element is configured to be welded to each other with the corresponding electrical connection part at the soldering pad.

12. The multiple birth contactor according to claim 11, characterized in that: The first conductive contact element comprises a first arc-shaped contact surface, wherein the first arc-shaped contact surface is configured to be snapped onto the outer peripheral wall of the first negative stationary contact; The second conductive contact element comprises a second arc-shaped contact surface, wherein the second arc-shaped contact surface is configured to be snapped onto the outer peripheral wall of the second negative stationary contact; The third conductive contact element comprises a third arcuate contact surface, wherein the third arcuate contact surface is configured to be snapped onto the outer peripheral wall of the first positive static contact; The fourth conductive contact element includes a fourth arc-shaped contact surface, and the fourth arc-shaped contact surface is configured to be snapped onto the outer peripheral wall of the second positive static contact.

13. A battery system, characterized in that The battery system comprises a battery, a battery distribution unit, and a battery management system, wherein the battery distribution unit comprises the multiple contactor according to any one of claims 1 to 12.

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