Conducting bar structure

Abstract

The utility model discloses a conducting bar structure, and relates to the conducting bar technology field, the conducting bar structure comprises a conducting bar and a fuse, the middle part of the conducting bar is partially hollowed out, so that the conducting bar forms a conducting bar part at the residual part, and the fuse is arranged in the conducting bar. Two lap joint parts which are arranged at intervals in the length direction of the conducting bar are formed at the hollowed-out position of the conducting bar. According to the technical scheme of the utility model, the middle part of the conducting bar is provided with a local hollow part, the hollow part is provided with a lap joint part for lap joint installation of a fuse, and the conducting bar is arranged in a parallel shunt manner through the hollow part corresponding to the rest part of the conducting bar. The current can be shunted and then fused in cooperation with the fuse, the specification of the fuse can be reduced through parallel shunting for a high-voltage large-current system, the cost and the space are saved, the over-current power-off protection function is achieved with the size as small as possible, and the effect is more reliable compared with the effect of independently using a conducting bar.

Description

Technical Field

[0001] The utility model relates to the technical field of conductive bars, in particular to a conductive bar structure. Background Art

[0002] Conductive busbar is a commonly used electrical equipment, its function is to provide stable current for electronic equipment and protect the equipment from damage due to overload and short circuit. The internal high-voltage circuit of the power battery generally uses copper busbar or aluminum busbar as the conductive component of the power input and output circuit. In order to avoid safety problems such as fire and explosion during short circuit, a fuse is connected in series in the circuit to quickly cut off the high-voltage circuit during short circuit. Generally, the larger the current of the battery circuit, the larger the fuse specification and the larger the volume. In order to solve the problem of large space and high cost of external fuses, the existing conductive busbar adopts a local narrowing method for overcurrent. However, this method cannot be melted under instantaneous high current and is not suitable for high-voltage and high-current systems, such as power battery systems.

[0003] In view of this, we propose a conductive bar structure to solve the above problems. Utility Model Content

[0004] The main purpose of the utility model is to provide a conductive bar structure, which is intended to reduce the specifications of the fuse by parallel shunting to achieve the purpose of high-voltage and high-current fusing.

[0005] In order to achieve the above-mentioned purpose, the conductive bar structure proposed by the present invention includes:

[0006] A conductive row, wherein the middle portion of the conductive row is partially hollowed out so that the conductive row forms a conductive strip portion at the remaining portion, and the conductive row is provided with two overlapping portions spaced apart in the length direction thereof at the hollowed-out portion; and

[0007] The fuse has two ends respectively connected to the two overlapping parts and electrically connected so as to be arranged in parallel with the conductive strip part.

[0008] In one embodiment, at least one end of the fuse is welded to the corresponding overlapping portion.

[0009] In one embodiment, a narrow-diameter fuse portion is partially formed on the conductive strip portion for overcurrent fusing.

[0010] In one embodiment, the conductive strip portion includes a first conductive segment, a second conductive segment and a third conductive segment that are adjacently arranged;

[0011] The first conductive segment and the third conductive segment are arranged at two sides of the second conductive segment along the length direction thereof, and the widths of the first conductive segment and the third conductive segment are arranged to be smaller than the width of the second conductive segment;

[0012] The narrow diameter fuse portion includes the first conductive segment and the third conductive segment.

[0013] In one embodiment, the conductive bar structure further includes a sensor, and the sensor is disposed on the narrow-diameter fuse portion.

[0014] In one embodiment, the conductive bar structure further includes a controller, and the controller is electrically connected to the sensor.

[0015] In one embodiment, the conductive bar structure further includes two connectors, and the two connectors are disposed at two ends of the conductive bar along its length direction.

[0016] In one embodiment, the conductive bar structure further includes an insulating member.

[0017] In one embodiment, the middle portion of the conductive row is partially hollowed out to form a hollow portion, and the hollow portion includes a first hollow portion and a second hollow portion that are arranged close to each other; wherein,

[0018] The first hollow portion is used for setting the overlapping portion;

[0019] At least a portion of the first hollow portion and the second hollow portion is enclosed by the insulating member, and the remaining portion of the second hollow portion forms an electrical gap.

[0020] In one embodiment, the material of the conductive bar includes at least one of copper and aluminum.

[0021] The technical solution of the utility model adopts a partial hollowing out arrangement formed in the middle position of the conductive bar, and an overlapping portion is provided at the hollowing out portion for overlapping installation of the fuse. The conductive bar corresponding to the remaining conductive strip portion is arranged in parallel shunt through the hollowing out portion, and the current can be shunted and then blown in cooperation with the fuse. The specification of the fuse can be reduced through parallel shunt for high-voltage and high-current systems, saving cost and space, and achieving the over-current power-off protection function with the smallest possible volume. Compared with using the conductive bar alone, the effect is more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of an embodiment of a conductive bar structure provided by the utility model;

[0024] Figure 2 This is a schematic diagram of an expanded and unclosed insulating member in the conductive bar structure provided by the utility model.

[0025] Description of Figure Numbers:

[0026] 100. Conductive bar structure; 1. Conductive bar; 11. Conductive strip portion; 111. First conductive segment; 112. Second conductive segment; 113. Third conductive segment; 12. Hollow portion; 121. First hollow portion; 122. Second hollow portion; 1221. Electrical gap; 13. Overlap portion; 14. Narrow-diameter fuse portion; 2. Fuse; 3. Sensor; 4. Controller; 5. Connector; 6. Insulator.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] Conductive busbar is a commonly used electrical equipment, its function is to provide stable current for electronic equipment and protect the equipment from damage due to overload and short circuit. The internal high-voltage circuit of the power battery generally uses copper busbar or aluminum busbar as the conductive component of the power input and output circuit. In order to avoid safety problems such as fire and explosion during short circuit, a fuse is connected in series in the circuit to quickly cut off the high-voltage circuit during short circuit. Generally, the larger the current of the battery circuit, the larger the fuse specification and the larger the volume. In order to solve the problem of large space and high cost of external fuses, the existing conductive busbar adopts a local narrowing method for overcurrent. However, this method cannot be melted under instantaneous high current and is not suitable for high-voltage and high-current systems, such as power battery systems.

[0032] The utility model provides a conductive bar structure.

[0033] See also Figure 1 and Figure 2 In one embodiment of the utility model, the conductive bar structure 100 includes a conductive bar 1 and a fuse 2. The middle portion of the conductive bar 1 is partially hollowed out so that the conductive bar 1 forms a conductive strip portion 11 at the remaining portion. The conductive bar 1 has two overlapping portions 13 spaced apart in its length direction at the hollowed-out portion; the two ends of the fuse 2 are respectively connected to the two overlapping portions 13 and electrically connected to be arranged in parallel with the conductive strip portion 11.

[0034] According to the technical solution of the utility model, the conductive bar structure 100 comprises a conductive bar 1 and a fuse 2, wherein the middle part of the conductive bar 1 is partially hollowed out so that the conductive bar 1 forms a conductive strip portion 11 corresponding to the remaining part, and the conductive bar 1 is formed with two overlapping portions 13 spaced apart in the length direction thereof at the hollowed-out part; the two ends of the fuse 2 are respectively connected to the two overlapping portions 13 and electrically connected to be arranged in parallel with the conductive strip portion 11; in this way, by adopting the partial hollowing-out arrangement formed at the middle part of the conductive bar 1, the overlapping portion 13 is provided at the hollowed-out part, which can be used for overlapping installation of the fuse 2, and the conductive bar 1 corresponds to the conductive strip portion 11 of the remaining part through the hollowed-out part in parallel shunting arrangement, and the current can be shunted and then melted in cooperation with the fuse 2, and the specification of the fuse 2 can be reduced by parallel shunting for high-voltage and high-current systems, saving costs and space, and achieving the over-current power-off protection function with the smallest possible volume, which is more reliable than using the conductive bar alone.

[0035] There are many ways to connect the overlapping portion 13 and the fuse 2. The overlapping portion 13 and the fuse 2 can be connected by bolts in cooperation with a mounting base, which has the effect of convenient disassembly and fixing.

[0036] In the embodiment of the utility model, since the fuse 2 is small in size, the fuse 2 can be directly welded to the conductive bar 1 by welding. Compared with the bolt setting method, there is no need to install the base, which saves space and cost, and the overall design structure and process are simpler and the yield rate is high.

[0037] It should be noted that the two overlapping portions 13 can be arranged at the ends of the hollow part or in the middle of the hollow part. It can be understood that as the battery system solution shifts from MTP to CTP, the fuse is generally arranged at the end of the battery circuit, because there is no space in the middle of the battery circuit to arrange a large fuse. Therefore, in this embodiment, since the specifications of the fuse 2 are set to be smaller and there is no need to cooperate with the installation base, the fuse 2 can be arranged in the middle of the CTP battery system circuit to improve the safety and reliability of the system.

[0038] Specifically, in the technical solution of the present invention, at least one end of the fuse 2 is welded to the corresponding overlapping portion 13. Such a configuration saves the traditional bolt structure, making the processing procedure simple, efficient and easy to obtain. In the present embodiment, preferably, both ends of the fuse 2 are welded to the corresponding overlapping portion 13, which is simple and convenient to operate.

[0039] In some embodiments, in order to achieve overcurrent fusing after diversion, the conductive strip portion 11 is partially formed with a narrow diameter fuse portion 14 for overcurrent fusing. In this way, when the current passes through the conductive strip portion 11, the narrow diameter fuse portion 14 can be over-temperature-fused, thereby cooperating with the fuse 2 to adapt to the fusing of large currents.

[0040] In some embodiments, the narrow-diameter fuse portion 14 may be formed in various ways, for example, by cutting a groove on the conductive strip portion 11 .

[0041] Specifically, in the technical solution of the present utility model, the conductive strip portion 11 includes a first conductive segment 111, a second conductive segment 112 and a third conductive segment 113 which are adjacently arranged; the first conductive segment 111 and the third conductive segment 113 are arranged on both sides of the second conductive segment 112 along its length direction, and the widths of the first conductive segment 111 and the third conductive segment 113 are reduced compared with the width of the second conductive segment 112; the narrow-diameter fuse portion 14 includes the first conductive segment 111 and the third conductive segment 113; Thus, the narrow-diameter fuse portion 14 includes the first conductive segment 111 and the third conductive segment 113, and the widths thereof are reduced. The width of the second conductive segment 112 is greater than the width of the narrow-diameter fuse portion 14, that is, the cross-sectional area of ​​the second conductive segment 112 is greater than the cross-sectional area of ​​the narrow-diameter fuse portion 14. Thus, when the current passes through the conductive bar 1, all the current is carried by the second conductive segment 112, and the narrow-diameter fuse portion 14 is over-current-fused, thereby achieving the effect of stable fusing with a small-specification fuse when a large current is generated.

[0042] In the embodiment of the present invention, there is no limitation on the specific configuration of the width of the first conductive segment 111 and the third conductive segment 113 being smaller than the width of the second conductive segment 112. For example, it can be realized by providing an arc groove. Figure 1 That is, the two ends of the arc-shaped groove correspond to form the first conductive segment 111 and the third conductive segment 113 , and the concave portion of the arc-shaped groove corresponds to the second conductive segment 112 .

[0043] In some embodiments, in order to monitor the overcurrent temperature of the narrow diameter fuse part 14, the practical technical solution of the present invention is that the conductive bar structure 100 also includes a sensor 3, and the sensor 3 is arranged on the narrow diameter fuse part 14; in this way, the overcurrent temperature of the narrow diameter fuse part 14 is monitored by the sensor 3 to provide protection for the conductive bar 1.

[0044] It should be noted that the sensor 3 includes a temperature sensor, so as to monitor the overcurrent temperature of the narrow-diameter fuse 14 .

[0045] Furthermore, the conductive bar structure 100 also includes a controller 4, which is electrically connected to the sensor 3; thus, through the setting of the controller 4, it plays a role in receiving signal feedback from the temperature sensor, thereby actively cutting off the loop current after the overcurrent temperature threshold condition or the temperature change rate condition is met, thereby protecting the conductive bar 1.

[0046] In this embodiment, the sensor 3 may be installed in a fixed manner at the position of the narrow-diameter fuse 14 , and the controller 4 may be an external device that is electrically connected to the sensor 3 through a wire.

[0047] In addition, the conductive bar structure 100 further includes two connectors 5, which are disposed at both ends of the conductive bar along its length direction. In this embodiment, the provision of the connectors 5 facilitates the installation of the conductive bar 1 with external conductive components.

[0048] It should be noted that the two connectors 5 may be fixed at both ends of the conductive bar 1 .

[0049] Specifically, the two joints 5 may be connected to an external conductive component by bolts to achieve overcurrent use of the conductive bar 1 .

[0050] In some embodiments, the conductive bar structure 100 further includes an insulating member 6 , wherein the insulating member 6 may be an insulating sleeve, which is formed by an injection molding process after the fuse 2 is installed.

[0051] Specifically, in an embodiment of the utility model, the middle portion of the conductive bar 1 is partially hollowed out to form a hollow portion 12, and the hollow portion 12 includes a first hollow portion 121 and a second hollow portion 122 that are arranged close to each other; wherein, the first hollow portion 121 is used for the arrangement of the overlapping portion 13; at least part of the first hollow portion 121 and the second hollow portion 122 are closed by the insulating member 6, and the remaining part of the second hollow portion 122 forms an electrical gap 1221; in this way, the insulating member 6 isolates the first hollow portion 121 from the second hollow portion 122, thereby avoiding air breakdown of the first hollow portion 121 and the second hollow portion 122, changing the overcurrent distribution ratio, and reducing the life and reliability of the conductive bar 1.

[0052] In addition, the material of the conductive bar 1 includes at least one of copper and aluminum. Thus, the conductive bar 1 can be made of copper or aluminum, and the material selection is easy and simple to obtain.

[0053] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A conductive bar structure, characterized in that: include: A conductive row, wherein the middle portion of the conductive row is partially hollowed out so that the conductive row forms a conductive strip portion at the remaining portion, and the conductive row is provided with two overlapping portions spaced apart in the length direction thereof at the hollowed-out portion; and The fuse has two ends respectively connected to the two overlapping parts and electrically connected so as to be arranged in parallel with the conductive strip part.

2. The conductive bar structure according to claim 1, characterized in that: At least one end of the fuse is welded and connected to the corresponding overlapping portion.

3. The conductive bar structure according to claim 1, characterized in that: The conductive strip portion is partially formed with a narrow-diameter fuse portion for overcurrent fusing.

4. The conductive bar structure according to claim 3, characterized in that: The conductive strip portion includes a first conductive segment, a second conductive segment and a third conductive segment which are adjacently arranged; The first conductive segment and the third conductive segment are arranged at two sides of the second conductive segment along the length direction thereof, and the widths of the first conductive segment and the third conductive segment are arranged to be smaller than the width of the second conductive segment; The narrow diameter fuse portion includes the first conductive segment and the third conductive segment.

5. The conductive bar structure according to claim 3, characterized in that: The conductive bar structure further includes a sensor, and the sensor is disposed on the narrow-diameter fuse portion.

6. The conductive bar structure according to claim 5, characterized in that: The conductive bar structure further includes a controller, and the controller is electrically connected to the sensor.

7. The conductive bar structure according to claim 1, characterized in that: The conductive bar structure further includes two connectors, which are located at two ends of the conductive bar along its length direction.

8. The conductive bar structure according to claim 1, characterized in that: The conductive bar structure further includes an insulating member.

9. The conductive bar structure according to claim 8, characterized in that: The middle part of the conductive row is partially hollowed out to form a hollow portion, and the hollow portion includes a first hollow portion and a second hollow portion which are arranged close to each other; wherein, The first hollow portion is used for setting the overlapping portion; At least a portion of the first hollow portion and the second hollow portion is enclosed by the insulating member, and the remaining portion of the second hollow portion forms an electrical gap.

10. The conductive bar structure according to claim 1, characterized in that: The material of the conductive bar includes at least one of copper and aluminum.

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