Connecting bar

Abstract

The utility model discloses a connecting bar, and aims to solve the problem that the conventional connecting bar is easy to generate electric arc in the fusing process, thereby causing adverse effects on equipment in an energy storage module. The utility model discloses a bar body and cladding ceramic, both ends of the bar body are provided with pole connection points, the cladding ceramic is arranged between the two pole connection points, the cladding ceramic wraps at least part of the over-current cross section of the bar body between the two pole connection points, and the cladding ceramic wraps the part of the over-current cross section to play an arc extinguishing role. And the reliability of internal components of the energy storage module is improved.

Description

Technical Field

[0001] The utility model relates to the field of lithium batteries, and more specifically, to a connecting bar. Background Art

[0002] Energy storage batteries are composed of several battery modules connected in series, and the series connection between battery modules depends on the connection bar. As the power of energy storage batteries increases, the overcurrent becomes higher and higher, and an arc will be generated when a short circuit is blown. The arc prolongs the time for the switch to break the fault circuit, aggravating the harm of the short circuit fault in the power system. The high temperature generated by the arc will also damage the battery module, and the arc may also damage the components on the integrated busbar.

[0003] In view of this, the present application aims to propose a connection bar that can achieve arc extinguishing function during the short circuit and fusing process of the battery pack. Summary of the invention

[0004] The utility model provides a connecting bar, which can realize the fusing and arc extinguishing functions by using the connecting bar.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A connecting bar comprises a bar body and a coating ceramic, wherein pole connection points are arranged at both ends of the bar body, the coating ceramic is arranged between the two pole connection points, and the coating ceramic covers at least part of the current flow section of the bar body between the two pole connection points.

[0007] In the present application, the two poles of the connecting row are electrically connected to the positive and negative poles of the two battery modules, respectively, so that the two battery modules are turned on. When a short circuit occurs, the current on the connecting row increases sharply, and the temperature rises and the circuit is broken. The distance between the remnants of the connecting row after melting and disintegration is small, and arcing is prone to occur. By setting an insulating coating ceramic on the current-carrying section, the remnants formed after the preset row body is melted are isolated to avoid the occurrence of arcing.

[0008] Preferably, the overcurrent bar is provided with an overcurrent area between the connection points of the two poles, and the cross section of the overcurrent area is smaller than the cross section of the area outside the overcurrent area. By actively reducing the cross section of the overcurrent area, the resistance therein is increased, so that the overcurrent area is preferentially blown after the current increases, thereby realizing the preset of the overcurrent area.

[0009] Preferably, the overcurrent region is thinner than the region outside the overcurrent region to reduce the overcurrent capacity and resistance value there, thereby achieving priority fusing and control of the fusing position there.

[0010] Preferably, along the length direction of the row body, the cross-sectional area of ​​the flow region changes from large to small and then to large.

[0011] Preferably, the cross-sectional areas at various locations in the flow region are of equal size.

[0012] Preferably, the flow-through region is provided with slots, and the flow-through capacity and resistance of the flow-through region are reduced by the slots.

[0013] Preferably, the slot is provided on the end surface of the row body.

[0014] Preferably, the slots are provided on the side surfaces of the row body.

[0015] Preferably, the surface of the coated ceramic is provided with an arc-isolating cap edge, which is arranged along the radial direction of the current flow. The structure further has the effect of isolating the arc, and can also play the role of arc extinguishing under normal switching conditions.

[0016] Preferably, there are several arc-isolating cap edges, and adjacent arc-isolating cap edges are arranged at equal intervals.

[0017] Compared with the prior art, the beneficial effects of the present invention are: (1) reducing the current capacity of the current area and increasing the resistance value, so that the current bar also serves as a fuse, thereby achieving compactness in space at a low cost; (2) by coating part of the current cross section with ceramic, an arc extinguishing effect is achieved, thereby improving the reliability of the internal components of the energy storage module. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of some embodiments of the utility model;

[0020] Figure 3 It is a schematic diagram of an embodiment of the row body of the utility model;

[0021] Figure 4 It is a schematic diagram of another embodiment of the row body of the utility model;

[0022] Figure 5 It is a schematic diagram of another embodiment of the row body of the utility model;

[0023] Figure 6 This is a schematic diagram of another embodiment of the utility model.

[0024] In the figure:

[0025] The pole body 1, the coating ceramic 2, the pole connection point 3, the current-passing area 4, the slot 5, and the arc-isolating cap edge 6. DETAILED DESCRIPTION

[0026] The present disclosure is further described below in conjunction with the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0028] Example:

[0029] A connecting row, Figure 1 As shown. It includes a row body 1 and a coated ceramic 2, and pole connection points 3 are provided at both ends of the row body 1. The coated ceramic 2 is arranged between the two pole connection points 3, and the coated ceramic 2 covers at least part of the flow cross section of the row body between the two pole connection points 3. The material of the connecting row can be a conventional aluminum row, a copper row or a copper-aluminum composite row, and all conductive materials. The so-called coating means that the coated ceramic 2 surrounds the row body 1 for a circle with the length direction of the connecting row as the axis. The direction between the two pole connection points 3 is the length direction. The coated ceramic 2 can cover part of the flow cross section between the two pole connection points 3. In other possible embodiments, the coated ceramic 2 can cover the entire flow cross section between the two pole connection points 3.

[0030] Reference Figure 2 As shown, the surface of the coated ceramic 2 is provided with an arc-isolating cap edge 6, and the arc-isolating cap edge 6 is arranged along the radial direction of the current flow. The structure further has the effect of isolating the arc, and can also play the role of arc extinguishing under normal switching conditions. Furthermore, the number of the arc-isolating cap edges 6 is several, and adjacent arc-isolating cap edges 6 are arranged at equal intervals. The arrangement of the arc-isolating cap edges 6 does not affect the normal use of the connecting bar. Specifically, the bottom part of the arc-isolating cap edge is omitted, and the upper part adapts to the structure of the integrated busbar.

[0031] In the present application, the two poles of the connecting row are electrically connected to the positive and negative poles of the two battery modules, respectively, so that the two battery modules are turned on. When a short circuit occurs, the current on the connecting row increases sharply, and the temperature rises and the circuit is broken. The distance between the remnants of the connecting row after melting and disintegration is small, and arcing is prone to occur. By setting an insulating coating ceramic 2 on the current-carrying section, the remnants formed after the preset row body 1 is melted are isolated to avoid the occurrence of arcing.

[0032] The overcurrent bar is provided with an overcurrent area 4 between the two pole connection points 3, and the cross section of the overcurrent area 4 is smaller than the cross section of the area outside the overcurrent area 4. By actively reducing the cross section of the overcurrent area 4, the resistance therein is increased, so that the overcurrent area 4 is preferentially melted after the current increases, thereby realizing the preset of the overcurrent area 4.

[0033] The overcurrent region 4 is thinner than the region outside the overcurrent region 4 to reduce the overcurrent capacity and resistance value at the location, thereby achieving priority fusing and control of the fusing position at the location. Figure 4 As shown, in some possible embodiments, the cross-sectional areas of the flow region 4 are the same in all places.

[0034] Ginseng Figure 5 As shown, in some embodiments, along the length direction of the row body 1, the cross-sectional area of ​​the flow region 4 changes from large to small and then to large. The structure is formed by extrusion.

[0035] Ginseng Figure 3 As shown, in other solutions, the flow area 4 is provided with a slot 5, and the flow capacity and resistance of the flow area 4 are reduced by the slot 5. The slot 5 is provided on the end face of the row body 1, or the slot 5 is provided on the side of the row body 1. The size is not limited to square or arc shape and all ways to reduce the flow area such as digging holes.

[0036] For the above-mentioned solution of forming the fusible region by compromising the cross-sectional area of ​​the current flow, the arc-isolating cap edge 6 not only extends outward, but also extends inward, further extinguishing the arc and supporting the row body 1, thereby improving its mechanical properties.

[0037] In some possible embodiments, the current-passing region 4 is embedded with or directly uses a conductor material with a larger resistance and a lower melting point.

[0038] In a further solution, the material replacement solution is also used in combination with the above-mentioned solution of damaging the cross-sectional area of ​​the current flow to form the fusible region. Figure 6 Cross-embedded and laminated types.

[0039] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A connecting bar, characterized in that: The invention comprises a row body and a coating ceramic, wherein pole connection points are arranged at both ends of the row body, the coating ceramic is arranged between the two pole connection points, and the coating ceramic covers at least part of the flow cross section of the row body between the two pole connection points.

2. A connecting bar according to claim 1, characterized in that: The current bar is provided with a current region between the connection points of the two poles, and the cross section of the current region is smaller than the cross section of the region outside the current region.

3. A connecting bar according to claim 2, characterized in that: The flow-through area is thinner than areas outside the flow-through area.

4. A connecting bar according to claim 3, characterized in that: Along the length direction of the row body, the cross-sectional area of ​​the flow region changes from large to small and then to large.

5. A connecting bar according to claim 3, characterized in that: The cross-sectional area of ​​the flow region is equal everywhere.

6. A connecting bar according to claim 2, characterized in that: The flow-through area is provided with slots.

7. A connecting bar according to claim 6, characterized in that: The slot is arranged on the end surface of the row body.

8. A connecting bar according to claim 6, characterized in that: The slots are arranged on the side surfaces of the row body.

9. A connecting bar according to claim 1, characterized in that: The surface of the cladding ceramic is provided with an arc-isolating cap edge, and the arc-isolating cap edge is arranged along the radial direction of current flow.

10. A connecting bar according to claim 9, characterized in that: The number of the arc-isolating cap edges is several, and adjacent arc-isolating cap edges are arranged at equal intervals.

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