Integrated busbar, battery module and electric device

Abstract

The invention discloses an integrated busbar, a battery module and an electric device, and relates to the technical field of batteries. The integrated busbar comprises an insulating support member, a plurality of busbars and a signal acquisition assembly. The insulating support member has a first direction and a second direction which intersect with each other. The insulating support member comprises a first insulating part, a wiring part and a second insulating part which are arranged in the first direction. The first side of the wiring part is provided with a wiring groove which is recessed towards the second side, the first insulating part is provided with a first avoiding hole, and the second insulating part is provided with a second avoiding hole. The busbar is arranged on the first side of the first insulating part. And at least part of the acquisition wire harness of the signal acquisition assembly is accommodated in the wiring groove. The wiring channel of the integrated busbar can accommodate the collection wire harness, the collection wire harness is protected, and the risk that the collection wire harness is damaged by sprayed objects is remarkably reduced. Therefore, the integrated busbar can improve the safety of the battery module and the electric device.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and in particular, to an integrated busbar, a battery module, and an electrical device. Background Art

[0002] In the related technologies in the field of batteries, a signal acquisition component on an integrated busbar uses a combination of a wire harness and a collection terminal to collect relevant information such as the voltage and temperature of a battery cell. Most of the wire harnesses are separated from the busbar by an insulating support. The wire harness and the battery cell are on the same side of the insulating support, while the busbar and the battery cell are on the opposite side of the insulating support. The insulating support is provided with wire holes for some wires in the wire harness to pass through. The wires are connected to the collection terminal, and the collection terminal is connected to the busbar, thereby realizing signal acquisition. However, when the battery cell is operating, it may generate heat and increase the internal pressure due to abnormalities. For safety reasons, when the internal pressure of the battery cell rises to a certain level, it will relieve pressure through an explosion-proof valve to avoid explosion. However, when the battery cell relieves pressure, the high-temperature ejected substances are likely to contaminate, corrode, or ablate the wire harness of the signal acquisition component, resulting in a relatively high risk of short circuit. Therefore, the safety of the integrated busbar in the related technologies is poor.

[0003] In view of this, the present application is specifically proposed. Summary of the Invention

[0004] The objectives of the present application include providing an integrated busbar, a battery module, and an electrical device. The integrated busbar can reduce the risk of damage to the wire harness of the signal acquisition component when the battery cell relieves pressure, and improve the safety of the battery module and the electrical device.

[0005] The embodiments of the present application can be implemented as follows:

[0006] In a first aspect, the present application provides an integrated busbar for connecting battery cells, including:

[0007] An insulating support having intersecting first and second directions. The insulating support includes a first insulating portion, a wire routing portion, and a second insulating portion arranged in the first direction. The first insulating portion, the wire routing portion, and the second insulating portion each have a first side facing the battery cell and a second side facing away from the battery cell in the second direction. A wire routing groove recessed toward the second side is formed on the first side of the wire routing portion. A first avoidance hole is formed on the first insulating portion, and a second avoidance hole is formed on the second insulating portion;

[0008] A plurality of busbars disposed on the second side of the first insulating portion;

[0009] A signal acquisition component for acquiring battery cell information. The signal acquisition component includes a collection wire harness, and at least part of the collection wire harness is received in the wire routing groove.

[0010] In an alternative embodiment, the signal acquisition component further includes acquisition terminals. A wire passing hole is formed in the wire routing groove. The wire passing hole communicates the interior of the wire routing groove with the second side of the wire routing portion. A part of the acquisition wire harness passes through the wire passing hole and is connected to the bus bar through the acquisition terminals.

[0011] In an alternative embodiment, along the first direction, the wire routing portion is located between the first insulating portion and the second insulating portion.

[0012] In an alternative embodiment, the wire routing groove has two side walls spaced apart in the first direction, and the wire passing hole is formed in the side wall of the wire routing groove closer to the first insulating portion among the two side walls.

[0013] In an alternative embodiment, the surface of the second side of the wire routing portion bulges in a direction away from the first side of the wire routing portion in the second direction.

[0014] In an alternative embodiment, the height by which the surface of the second side of the wire routing portion bulges in the second direction relative to the surface of the second side of the second insulating portion is H mm, and the value range of H is 5 to 12.

[0015] In an alternative embodiment, a plurality of second avoidance holes are provided on the second insulating portion, and the plurality of second avoidance holes are arranged at intervals in the third direction, where the third direction is perpendicular to the first direction and the second direction respectively.

[0016] In an alternative embodiment, the second insulating portion is a strip-shaped plate body. The width direction of the second insulating portion is parallel to the first direction, the thickness direction of the second insulating portion is parallel to the second direction, and the length direction of the second insulating portion is parallel to the third direction.

[0017] In an alternative embodiment, the width of the wire routing groove in the first direction is W mm, and the value range of W is 5 to 12;

[0018] and / or, the depth of the wire routing groove in the second direction is D mm, and the value range of D is 5 to 12.

[0019] In an alternative embodiment, the insulating support includes two first insulating portions and two wire routing portions. The two ends of the second insulating portion spaced apart in the first direction are respectively connected to one first insulating portion through one wire routing portion.

[0020] In an alternative embodiment, the material of the bus bar is selected from at least one of aluminum and copper.

[0021] In an alternative embodiment, the insulating support is integrally formed.

[0022] In an alternative embodiment, the material of the insulating support is selected from at least one of polycarbonate, polyethylene terephthalate, polyamide, polyether ether ketone, glass fiber reinforced plastic, and ceramic.

[0023] In an alternative embodiment, a retaining portion protrudes from the first side of the second insulating portion. The retaining portion is disposed around the second avoidance hole and is used to abut against the housing of the battery cell.

[0024] In a second aspect, the present application provides a battery module, including a battery cell and the integrated busbar according to any one of the foregoing embodiments. The battery cell includes an explosion-proof valve and a terminal post. The explosion-proof valve is located on the first side of the second insulating portion and is opposite to the second avoidance hole. The terminal post passes through the first avoidance hole and is connected to the busbar.

[0025] In a third aspect, the present application provides an electrical device, including the battery module according to the foregoing embodiment.

[0026] The beneficial effects of the integrated busbar, battery module, and electrical device provided by the embodiments of the present application include:

[0027] The present application provides an integrated busbar for connecting battery cells. The integrated busbar includes an insulating support, a plurality of busbars, and a signal acquisition component. The insulating support has an intersecting first direction and a second direction. The insulating support includes a first insulating portion, a wiring portion, and a second insulating portion arranged in the first direction. The first insulating portion, the wiring portion, and the second insulating portion all have a first side facing the battery cell and a second side facing away from the battery cell in the second direction. A wiring groove recessed from the first side to the second side is formed on the first side of the wiring portion. A first avoidance hole is formed on the first insulating portion, and a second avoidance hole is formed on the second insulating portion. The busbars are disposed on the first side of the first insulating portion. The signal acquisition component is used to acquire battery cell information. The signal acquisition component includes an acquisition wire harness, and at least a part of the acquisition wire harness is accommodated in the wiring groove. When the battery cell relieves pressure, the ejected matter ejected from the battery cell can be released from the first side of the second insulating portion to the second side through the second avoidance hole on the second insulating portion, so as to be separated from the battery cell and the acquisition wire harness on the same side as the battery cell, reducing the risk of damage to the acquisition wire harness by the ejected matter. Further, the wiring groove is formed on the second side of the wiring portion facing the battery cell. The wiring groove can accommodate the acquisition wire harness, avoiding the acquisition wire harness from being scattered in other areas (for example, avoiding it from being scattered on the first side of the second insulating portion), and being in a semi-wrapping state with respect to the acquisition wire harness. In this case, even if a small amount of battery cell ejected matter does not pass through the second avoidance hole and remains between the insulating support and the battery cell, the acquisition wire harness will be protected by the wiring groove, and the risk of damage by the ejected matter will be significantly reduced. In addition, accommodating the acquisition wire harness in the wiring groove will not be distributed between the second insulating portion and the battery cell, which is conducive to the abutment of the first side of the second insulating portion against the battery cell, not only reducing the risk of thermal runaway spread and damage to the acquisition wire harness caused by the retention of the ejected matter between the insulating support and the battery cell, but also making the overall structure of the battery module more compact.

[0028] The battery module provided by the embodiment of the present application includes a battery cell and the above-mentioned integrated busbar. The electrical device provided by the embodiment of the present application includes the above-mentioned battery module. Therefore, the battery module and the electrical device provided by the embodiment of the present application also correspondingly have the advantage of high safety. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0030] Figure 1 Schematic diagram of a battery module in an embodiment of the present application;

[0031] Figure 2 Exploded view of a battery module in an embodiment of the present application;

[0032] Figure 3 Schematic diagram of a battery cell in an embodiment of the present application;

[0033] Figure 4 Schematic diagram of an integrated busbar in an embodiment of the present application;

[0034] Figure 5 For Figure 4 Enlarged view of the partial V;

[0035] Figure 6 Schematic diagram of an insulating support member in a first perspective in an embodiment of the present application;

[0036] Figure 7 Schematic diagram of an insulating support member in a second perspective in an embodiment of the present application.

[0037] Reference Signs: 100 - battery cell; 110 - housing; 111 - pressure relief hole; 112 - explosion-proof valve; 120 - terminal; 200 - integrated busbar; 210 - insulating support member; 211 - first insulating portion; 2111 - first avoidance hole; 2112 - limiting groove; 212 - second insulating portion; 2121 - second avoidance hole; 2122 - enclosing portion; 213 - wiring portion; 2131 - wiring groove; 2132 - wire passing hole; 220 - acquisition terminal; 230 - bus bar; 241 - first output pole; 242 - second output pole; 300 - frame. Detailed Embodiments

[0038] To make the objectives, technical solutions and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some but not all of the embodiments of this application. Components of the embodiments of this application generally described and illustrated in the figures herein can be arranged and designed in a variety of different configurations.

[0039] Therefore, the detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of this application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of this application without creative efforts fall within the scope of protection of this application.

[0040] It should be noted that like reference numerals and letters denote like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

[0041] In the description of this application, it should be noted that if terms such as "upper", "lower", "inner", "outer", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the inventive product is customarily placed during use, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this application.

[0042] In addition, terms such as "first", "second", etc. are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0043] It should be noted that the features in the embodiments of this application can be combined with each other without conflict.

[0044] At present, the signal acquisition component composed of a collection harness and collection terminals has the characteristics of being easy to waterproof and moisture-proof, high reliability, long service life, etc. compared with the signal acquisition component including a Flexible Printed Circuit (FPC), and also has a lower cost. However, in the signal acquisition component composed of a collection harness and collection terminals, most of the collection harnesses and battery cells are on the same side of the insulating support. When the battery cell vents due to thermal runaway, the high-temperature and highly corrosive ejected substances (including high-temperature electrolyte and high-temperature gas) ejected are likely to damage the collection harness once they stay between the insulating support and the battery cell. For example, it will ablate the insulating layer wrapped outside the harness, resulting in the problem of harness short circuit. Moreover, the collection harnesses are scattered between the battery cell and the insulating support, which is not conducive to the fitting of the insulating support and the battery cell, affecting the compactness of the battery module.

[0045] In order to improve at least one of the above-mentioned deficiencies in the related art, an embodiment of the present application provides an integrated busbar. By providing a wiring groove on the side of the insulating support facing the battery cell to accommodate at least part of the collection harness, the protection of the collection harness is improved, thereby improving the safety of the battery module. Further, an embodiment of the present application also provides a battery module and an electrical device.

[0046] Figure 1 Schematic diagram of a battery module in an embodiment of the present application; Figure 2 Exploded view of a battery module in an embodiment of the present application. As Figure 1 and Figure 2 shown, the battery module provided by the embodiment of the present application includes a plurality of battery cells 100 and an integrated busbar 200. The integrated busbar 200 is used to connect the battery cells 100 to achieve electrical connection between the battery cells 100 and collect relevant information (such as temperature, voltage, etc.) of the battery cells 100. The integrated busbar 200 and the plurality of battery cells 100 are arranged in the second direction Y. That is, the integrated busbar 200 is arranged on one side of the battery cells 100 in the second direction Y. In the embodiment of the present application, the plurality of battery cells 100 are arranged in a row along the third direction Z. The pole column 120 of the battery cell 100 is located at one end of the battery cell 100 in the second direction Y. The end of the battery cell 100 with the pole column 120 faces the integrated busbar 200, and the pole column 120 forms an electrical connection with the integrated busbar 200.

[0047] In an embodiment of the present application, the battery cell 100 includes a housing 110, an electrode assembly (not shown in the figure), and a terminal 120. The electrode assembly is disposed inside the housing 110, and the terminal 120 is connected to the electrode assembly and protrudes from the outer surface of the housing 110. In the embodiment of the present application, a pressure relief hole 111 is provided on the housing 110, and an explosion-proof valve 112 is provided at the pressure relief hole 111. When there is no abnormality in the battery cell 100, the explosion-proof valve 112 blocks the pressure relief hole 111; when the internal pressure of the battery cell 100 rises sharply to a threshold value due to an abnormality, the internal pressure of the housing 110 will damage the explosion-proof valve 112, so that the pressure is released from the pressure relief hole 111, thereby preventing the battery cell 100 from exploding due to excessive internal pressure. When the pressure is released through the pressure relief hole 111, some substances inside the battery cell 100 may be ejected from the pressure relief hole 111 along with the gas. Therefore, the pressure relief hole 111 and the explosion-proof valve 112 can not only be used to release pressure and prevent explosion, but also play a role in directional pressure relief, thereby avoiding the arbitrary diffusion of the ejected substances.

[0048] In the embodiment of the present application, the pressure relief hole 111, the explosion-proof valve 112, and the terminal 120 of the battery cell 100 are disposed on the same side of the housing 110, that is, the pressure relief hole 111 faces the integrated busbar 200 in the second direction Y.

[0049] Figure 3 Schematic diagram of the battery cell 100 in an embodiment of the present application. As Figure 3 shown, optionally, the battery cell 100 is a rectangular battery cell, and the housing 110 of the battery cell 100 has six faces. Specifically, the six faces include a top face, a bottom face, two small faces, and two large faces. The terminal 120, the pressure relief hole 111, and the explosion-proof valve 112 are disposed on the top face of the housing 110. It should be understood that the large face of the housing 110 has a larger area than the small face. When the battery cell 100 is assembled in the battery module, the top face and the bottom face of the housing 110 of the battery cell 100 are spaced apart in the second direction Y, the two small faces of the housing 110 of the battery cell 100 are spaced apart in the first direction X, and the two large faces of the housing 110 of the battery cell 100 are spaced apart in the third direction Z. In this embodiment, the first direction X, the second direction Y, and the third direction Z are perpendicular to each other in pairs. When the battery cells 100 are arranged along the third direction Z when assembled in the battery module, the large faces of two adjacent battery cells 100 face each other.

[0050] Specifically, the battery cell 100 includes two pole columns 120, which are a positive pole column and a negative pole column respectively. The two pole columns 120 are spaced apart in the first direction X, and the pressure relief hole 111 and the explosion-proof valve 112 are disposed between the two pole columns 120. Optionally, the material of the pole column 120 can be selected from metal materials, such as copper, aluminum or alloy. Optionally, the battery cell 100 can be a lithium-ion battery, a sodium-ion battery, a solid-state battery or a semi-solid-state battery. It should be understood that in other alternative embodiments, the battery cell 100 can also be selected in other shapes, such as cylindrical.

[0051] To improve the structural stability of the battery module, the battery module in the embodiment of the present application further includes a frame 300, and the frame 300 is used to define the relative positions of the respective battery cells 100, so that the respective battery cells 100 are closely arranged together to prevent the battery cells 100 from shifting.

[0052] Figure 4 Schematic diagram of an integrated busbar 200 in an embodiment of the present application; Figure 5 For Figure 4 Enlarged view of partial V in; Figure 6 Schematic diagram of the insulating support 210 in the first perspective in an embodiment of the present application. As Figures 4 to 6 shown, in the present application, the integrated busbar 200 includes an insulating support 210, a signal acquisition component and a plurality of busbars 230. The insulating support 210 includes a first insulating portion 211, a wiring portion 213 and a second insulating portion 212 arranged in the first direction X. The first insulating portion 211, the wiring portion 213 and the second insulating portion 212 all have a first side facing the battery cell 100 and a second side facing away from the battery cell 100 in the second direction Y. A wiring groove 2131 recessed from the first side to the second side is formed on the first side of the wiring portion 213. A first avoidance hole 2111 is formed on the first insulating portion 211, and a second avoidance hole 2121 is formed on the second insulating portion 212. The busbar 230 is disposed on the second side of the first insulating portion 211. When the integrated busbar 200 is installed on the battery cell 100, the pole column 120 passes through the first avoidance hole 2111 and is connected to the busbar 230. In the present application, each busbar 230 connects the pole columns 120 of two adjacent battery cells 100, so that two adjacent battery cells 100 are electrically connected. The signal acquisition component is used to acquire battery cell 100 information, such as voltage, temperature and other information. In this embodiment, the signal acquisition component includes a collection wire harness (not shown in the figure) and a collection terminal 220, and at least part of the collection wire harness is accommodated in the wiring groove 2131.

[0053] In this embodiment, the insulating support 210 is provided to separate the acquisition wire harness and the battery cell 100 on one side of the insulating support 210, and the bus bar 230 is separated on the other side of the insulating support 210, thereby preventing the bus bar 230 from contacting the housing 110 of the battery cell 100 or the acquisition wire harness, and further preventing negative impacts (such as short circuit or thermal influence) from occurring between the bus bar 230 with a relatively high current and the housing 110 of the battery cell 100 or the acquisition wire harness. In this embodiment, the insulating support 210 also has a first side facing the battery cell 100 and a second side facing away from the battery cell 100 in the second direction Y. The first side of the insulating support 210 is composed of the first sides of the first insulating portion 211, the wire routing portion 213, and the second insulating portion 212, and the second side of the insulating support 210 is composed of the second sides of the first insulating portion 211, the wire routing portion 213, and the second insulating portion 212.

[0054] In this application, when the battery cell 100 relieves pressure, the ejected matter ejected from the battery cell 100 can be released from the first side of the second insulating portion 212 to the second side through the second avoidance hole 2121 on the second insulating portion 212, so as to be separated from the battery cell 100 and the acquisition wire harness on the first side of the insulating support 210, reducing the risk of damage to the acquisition wire harness by the ejected matter. Further, the wire routing portion 213 forms a wire routing groove 2131 on the second side facing the battery cell 100. The wire routing groove 2131 can accommodate the acquisition wire harness, preventing the acquisition wire harness from being scattered in other areas (such as preventing it from being scattered on the first side of the second insulating portion 212), and being in a semi-wrapping state with respect to the acquisition wire harness. In this case, even if a small amount of the ejected matter of the battery cell 100 does not pass through the second avoidance hole 2121 and remains between the insulating support 210 and the battery cell 100, the acquisition wire harness will be protected by the wire routing groove 2131, and the risk of being damaged by the ejected matter will be significantly reduced. In addition, by accommodating the acquisition wire harness in the wire routing groove 2131, it will not be distributed between the second insulating portion 212 and the battery cell 100, which is conducive to the first side of the second insulating portion 212 abutting against the battery cell 100, not only reducing the risk of thermal runaway spread and damage to the acquisition wire harness caused by the ejected matter staying between the insulating support 210 and the battery cell 100, but also making the overall structure of the battery module more compact.

[0055] Optionally, a limiting groove 2112 is provided on the second side of the first insulating portion 211, and the bus bar 230 is arranged in the limiting groove 2112. The limiting groove 2112 can limit the bus bar 230, thereby restricting its displacement in the first direction X and the third direction Z. The first avoidance hole 2111 is opened at the bottom of the limiting groove 2112. Optionally, the bus bar 230 can be connected to the insulating support 210 through fasteners (such as screws, rivets).

[0056] Optionally, the second avoidance hole 2121 is larger than or equal to the size of the pressure relief hole 111 on the battery cell 100, so as to prevent the second insulating part 212 from blocking the ejected matter; optionally, the second avoidance hole 2121 has the same shape as the pressure relief hole 111. For example, in this embodiment, both the pressure relief hole 111 and the second avoidance hole 2121 are waist-shaped holes. In other embodiments, the pressure relief hole 111 and the second avoidance hole 2121 may adopt other shapes, such as circular, rectangular, oval, triangular, etc.

[0057] Optionally, a retaining part 2122 protrudes from the first side of the second insulating part 212. The retaining part 2122 is arranged around the second avoidance hole 2121 and is used to abut against the housing 110 of the battery cell 100. The retaining part 2122 forms a boss protruding towards the direction where the battery cell 100 is located. When the integrated busbar 200 is arranged on the battery cell 100, the retaining part 2122 abuts against the surface of the housing 110 of the battery cell 100 to form a certain degree of seal. The space surrounded by the retaining part 2122 and the inner space of the second avoidance hole 2121 together form a conveying channel for the ejected matter. Under the blocking action of the retaining part 2122, the ejected matter can be smoothly conveyed along this conveying channel to the second side of the second insulating part 212 without escaping between the insulating support 210 and the battery cell 100, which can further reduce the risk of the ejected matter damaging the acquisition wire harness.

[0058] In this embodiment, a wire passing hole 2132 is formed in the wire routing groove 2131. The wire passing hole 2132 communicates the inside of the wire routing groove 2131 with the second side of the wire routing part 213. Part of the acquisition wire harness passes through the wire passing hole 2132 and is connected to the busbar 230 through the acquisition terminal 220. It can be understood that the acquisition wire harness includes several wires. Part of the acquisition wire harness passes through the wire passing hole 2132 and is connected to the busbar 230 through the acquisition terminal 220, specifically referring to one or more wires separated from the acquisition wire harness passing through the wire passing hole 2132, extending from the second side of the wire routing part 213 to the second side of the first insulating part 211. The end of the wire is connected to the acquisition terminal 220, and the acquisition terminal 220 is connected to the busbar 230, thereby realizing signal acquisition.

[0059] In this embodiment, the first insulating part 211 and the wire routing part 213 are connected in the first direction X. The opening formed by the end of the wire passing hole 2132 away from the wire routing groove 2131 faces the first insulating part 211 connected to the wire routing part 213, so that after the wire passes out of the wire routing groove 2131 to the second side of the wire routing part 213, it can extend to the second side of the first insulating part 211 with a shorter path and fewer bends. It should be understood that the aperture of the wire passing hole 2132 can be set as required to ensure that all wires that need to pass through the wire passing hole 2132 can pass through.

[0060] In this embodiment, along the first direction X, the wiring portion 213 is located between the first insulating portion 211 and the second insulating portion 212. When the ejecta of the battery cell 100 is ejected from the second avoidance hole 2121 to the second side of the second insulating portion 212, since the wiring portion 213 plays a certain separating role between the first insulating portion 211 and the second insulating portion 212, the ejecta is not likely to spread rapidly to the bus bar 230 on the second side of the first insulating portion 211, reducing the risk of short circuit of the bus bar 230 caused by the ejecta. In this embodiment, the insulating support 210 includes two first insulating portions 211 and two wiring portions 213. The two ends of the second insulating portion 212 spaced apart in the first direction X are respectively connected to a first insulating portion 211 through a wiring portion 213. Correspondingly, the integrated bus bar 200 includes two columns of bus bars 230. The two columns of bus bars 230 are spaced apart in the first direction X. Each column of bus bars 230 includes a plurality of bus bars 230 arranged in the third direction Z. A column of bus bars 230 is provided on the second side of each first insulating portion 211. In other alternative embodiments, the wiring portion 213 may also be connected to the end of the first insulating portion 211 far from the second insulating portion 212 in the first direction X, and the first insulating portion 211 and the second insulating portion 212 are directly connected.

[0061] In this embodiment, the first insulating portion 211 is a strip-shaped structure extending in the third direction Z. A plurality of first avoidance holes 2111 are provided on the first insulating portion 211. The plurality of first avoidance holes 2111 are arranged at intervals in the third direction Z. Optionally, the second insulating portion 212 is a strip-shaped plate body. The width direction of the second insulating portion 212 is parallel to the first direction X. The thickness direction of the second insulating portion 212 is parallel to the second direction Y. The length direction of the second insulating portion 212 is parallel to the third direction Z. A plurality of second avoidance holes 2121 are provided on the second insulating portion 212. The plurality of second avoidance holes 2121 are arranged at intervals in the third direction Z. It should be understood that in this embodiment, one battery cell 100 has one explosion-proof valve 112 and two pole columns 120. Therefore, the number of the first avoidance holes 2111 on the first insulating portion 211 is the same as the number of the battery cells 100; the number of the second avoidance holes 2121 on the second insulating portion 212 is the same as the number of the battery cells 100 and corresponds to each explosion-proof valve 112 one by one.

[0062] In this embodiment, the wire routing groove 2131 has two side walls spaced in the first direction X, and the wire passing hole 2132 is formed in the side wall of the wire routing groove 2131 that is closer to the first insulating portion 211 (specifically, the first insulating portion 211 adjacent to the wire routing portion 213 where the wire routing groove 2131 is provided). Specifically, the inner wall surface of the wire routing groove 2131 may include a concave cylindrical surface, the generatrix of which extends along the third direction Z, and the surface of the second side of the wire routing portion 213 may include a convex cylindrical surface, the generatrix of which extends along the third direction Z; optionally, the above-mentioned concave cylindrical surface and convex cylindrical surface may be selected as a semi-cylindrical surface, a semi-elliptical cylindrical surface or a cylindrical surface with a parabola as the directrix. It should be understood that in other alternative embodiments, the wire routing groove 2131 may also be other shapes such as a trapezoidal groove, a dovetail groove, a rectangular groove, etc.

[0063] Furthermore, the surface of the second side of the wire routing portion 213 bulges in the direction away from the first side of the wire routing portion 213. In this embodiment, the vertex of the second side of the wire routing portion 213 in the second direction Y should be higher than the surface of the second side of the second insulating portion 212. By setting the wire routing portion 213 into a convex structure, the wire routing portion 213 has surfaces facing the first insulating portion 211 and the second insulating portion 212; among them, one end opening of the wire passing hole 2132 is formed on the surface facing the first insulating portion 211, which is convenient for leading out the wire, and the surface facing the second insulating portion 212 can, after the battery cell 100 is depressurized, block the ejected matter and prevent the ejected matter from moving from the second side of the second insulating portion 212 towards the direction where the first insulating portion 211 is located, thereby reducing the risk of the bus bar 230 being contaminated, corroded, and short-circuited by the ejected matter. In this embodiment, since the wire routing portions 213 are connected to both ends of the second insulating portion 212 in the first direction X, the two wire routing portions 213 and the second insulating portion 212 together form a groove body, and this groove body can limit the diffusion of the ejected matter in the first direction X, keeping the ejected matter on the second side of the second insulating portion 212 and not easily affecting other areas.

[0064] Figure 7 It is a schematic diagram of the insulating support 210 in a second perspective in an embodiment of the present application. As Figure 7As shown, the height of the surface of the second side of the wiring portion 213 protruding in the second direction Y with respect to the surface of the second side of the second insulating portion 212 is H mm, and the value range of H is 5 to 12. The height of the surface of the second side of the wiring portion 213 protruding with respect to the surface of the second side of the second insulating portion 212, that is, the distance between the vertex of the surface of the second side of the wiring portion 213 and the plane where the surface of the second side of the second insulating portion 212 is located. By setting the protruding height of the second side of the wiring portion 213 to 5 to 12 mm, the wiring portion 213 can effectively separate the second side of the first insulating portion 211 and the second side of the second insulating portion 212. When the ejecta of the battery cell 100 is ejected from the second relief hole 2121 to the second side of the second insulating portion 212, the wiring portion 213 can block the ejecta from moving to the second side of the first insulating portion 211, thereby reducing the influence of the ejecta on the bus bar 230. At the same time, the protrusion of the second side of the wiring portion 213 can provide more space for the wiring groove 2131, so that the wiring groove 2131 has enough capacity to accommodate the acquisition harness. It should be understood that the protruding height of the wiring portion 213 should be reasonably set. If it is too small, the blocking effect of the wiring portion 213 will deteriorate, and at the same time, the depth of the wiring groove 2131 is difficult to meet the requirements for accommodating the acquisition harness; while too large a protruding height is likely to cause the battery module to have a larger size in the second direction Y and not be compact enough.

[0065] Optionally, the width of the wiring groove 2131 in the first direction X is W mm, and the value range of W is 5 to 12; optionally, the depth of the wiring groove 2131 in the second direction Y is D mm, and the value range of D is 5 to 12. It should be understood that the width and depth of the wiring groove 2131 should be set to be able to accommodate the acquisition harness. In order to ensure the reliability of the acquisition harness in the wiring groove 2131, the acquisition harness can be adhesively fixed by tape or glue, or a limiting structure can be provided at the opening of the wiring groove 2131. The limiting structure is spaced relative to the bottom of the wiring groove 2131 in the depth direction of the wiring groove 2131 (that is, the second direction Y), and the limiting structure can block the acquisition harness to prevent it from falling out of the wiring groove 2131. The acquisition terminal 220 can be connected to the bus bar 230 by welding or by tape; the part of the wire between the acquisition terminal 220 and the wire passing hole 2132 can be fixed to the bus bar 230 and / or the insulating support 210 by glue or tape, thereby improving the reliability.

[0066] In this embodiment, the integrated busbar 200 further includes a first output terminal 241 and a second output terminal 242. The first output terminal 241 and the second output terminal 242 are respectively located at two ends of the insulating support 210 in the third direction Z and on the second side of the insulating support 210. The electrode terminals 120 of the two battery cells 100 at both ends in the third direction Z are respectively connected to the first output terminal 241 and the second output terminal 242. For example, the positive electrode terminal of one battery cell 100 is connected to the first output terminal 241, and the negative electrode terminal of the other battery cell 100 is connected to the second output terminal 242. The first output terminal 241 and the second output terminal 242 constitute the positive and negative electrodes of the entire battery module.

[0067] Optionally, the materials of the busbar 230, the first output terminal 241, and the second output terminal 242 are selected from at least one of aluminum and copper. In a specific embodiment, the material of the electrode terminal 120 of the battery cell 100 is aluminum, and the materials of the busbar 230, the first output terminal 241, and the second output terminal 242 are also aluminum. The busbar 230, the first output terminal 241, and the second output terminal 242 can be connected to the electrode terminal 120 by welding, or can be connected to the electrode terminal 120 using fasteners such as screws and rivets.

[0068] Optionally, the insulating support 210 is integrally formed to improve the structural reliability of the insulating support 210. The material of the insulating support 210 is selected from at least one of polycarbonate (PC), polyethylene terephthalate (PET), polyamide (PA), polyether ether ketone (PEEK), fiberglass reinforced plastic (FRP), and ceramics. The insulating support 210 can be a single-layer structure or a multi-layer composite material. Optionally, the insulating support 210 is formed by injection molding.

[0069] The thickness of the insulating support 210 should be set according to the required strength. Optionally, the thickness of the second insulating portion 212 can be selected to be 0.2 - 2 mm; the thickness between the inner wall surface of the wire groove 2131 of the wire routing portion 213 and the surface of the second side of the wire routing portion 213 can be selected to be 0.2 - 2 mm. The insulating support 210 can have a uniform thickness, or can be thickened or thinned locally to meet the usage requirements.

[0070] In other alternative embodiments, the insulating support 210 can also be a split design. For example, the first insulating portion 211, the second insulating portion 212, and the wire routing portion 213 can be separate parts, and the three are connected by a snap structure, adhesive, or fasteners.

[0071] The embodiment of the present application further provides an electrical device, including the above battery module. The electrical device can be a new energy vehicle, and the battery module serves as the power battery of the new energy vehicle. In other embodiments, the electrical device can also be other electrical equipment such as an aircraft or a household appliance.

[0072] In summary, the present application provides an integrated busbar 200 for connecting the battery cells 100. The integrated busbar 200 includes an insulating support 210, a plurality of busbars 230, and a signal acquisition component. The insulating support 210 has an intersecting first direction X and second direction Y. The insulating support 210 includes a first insulating portion 211, a wiring portion 213, and a second insulating portion 212 arranged in the first direction X. The first insulating portion 211, the wiring portion 213, and the second insulating portion 212 all have a first side facing the battery cell 100 and a second side facing away from the battery cell 100 in the second direction Y. A wiring groove 2131 recessed from the first side to the second side is formed on the first side of the wiring portion 213. A first avoidance hole 2111 is formed on the first insulating portion 211, and a second avoidance hole 2121 is formed on the second insulating portion 212. The busbar 230 is disposed on the first side of the first insulating portion 211. The signal acquisition component is used to acquire information of the battery cell 100. The signal acquisition component includes a collection wire harness, and at least part of the collection wire harness is accommodated in the wiring groove 2131. When the battery cell 100 relieves pressure, the ejected matter ejected from the battery cell 100 can be released from the first side to the second side of the second insulating portion 212 through the second avoidance hole 2121 on the second insulating portion 212, so as to be separated from the battery cell 100 and the collection wire harness on the same side as the battery cell 100, reducing the risk of damage to the collection wire harness by the ejected matter. Further, the wiring groove 2131 is formed on the second side of the wiring portion 213 facing the battery cell 100. The wiring groove 2131 can accommodate the collection wire harness, avoiding the collection wire harness from being scattered in other areas (for example, avoiding it from being scattered on the first side of the second insulating portion 212), and being in a semi-wrapping state for the collection wire harness. In this case, even if a small amount of ejected matter from the battery cell 100 does not pass through the second avoidance hole 2121 and remains between the insulating support 210 and the battery cell 100, the collection wire harness will be protected by the wiring groove 2131, and the risk of damage by the ejected matter will be significantly reduced. In addition, by accommodating the collection wire harness in the wiring groove 2131, it will not be distributed between the second insulating portion 212 and the battery cell 100, which is conducive to the first side of the second insulating portion 212 abutting against the battery cell 100. This not only reduces the risk of thermal runaway spread and damage to the collection wire harness caused by the ejection matter remaining between the insulating support 210 and the battery cell 100, but also makes the overall structure of the battery module more compact.

[0073] The present application also provides a battery module and an electrical device. The battery module includes a battery cell 100 and the above-mentioned integrated busbar 200. The electrical device provided by the embodiments of the present application includes the above-mentioned battery module. Therefore, the battery module and the electrical device provided by the embodiments of the present application also correspondingly have the advantage of high safety.

[0074] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application.

Claims

1. An integrated busbar for connecting battery cells (100), characterized in that: include: An insulating support member (210), the insulating support member (210) having a first direction (X) and a second direction (Y) intersecting each other, the insulating support member (210) comprising a first insulating portion (211), a wiring portion (213) and a second insulating portion (212) arranged in the first direction (X), the first insulating portion (211), the wiring portion (213) and the second insulating portion (212) all having a first side facing the battery cell (100) and a second side facing away from the battery cell (100) in the second direction (Y), a wiring groove (2131) recessed toward the second side is formed on the first side of the wiring portion (213), a first avoidance hole (2111) is provided on the first insulating portion (211), and a second avoidance hole (2121) is provided on the second insulating portion (212); a plurality of busbars (230), wherein the busbars (230) are arranged on a second side of the first insulating portion (211); A signal acquisition component is used to acquire information of a battery cell (100), the signal acquisition component comprising an acquisition wiring harness, at least a portion of the acquisition wiring harness being accommodated in the wiring groove (2131).

2. The integrated busbar according to claim 1, characterized in that: The signal acquisition component also includes an acquisition terminal (220), a wire hole (2132) is provided in the wiring groove (2131), the wire hole (2132) connects the inside of the wiring groove (2131) and the second side of the wiring portion (213), and part of the acquisition wire harness passes through the wire hole (2132) and is connected to the bus (230) through the acquisition terminal (220).

3. The integrated busbar according to claim 2, characterized in that: Along the first direction (X), the routing portion (213) is located between the first insulating portion (211) and the second insulating portion (212).

4. The integrated busbar according to claim 3, characterized in that: The wiring groove (2131) has two side walls spaced apart in the first direction (X), and the wire hole (2132) is opened on the side wall of the two side walls of the wiring groove (2131) close to the first insulating portion (211).

5. The integrated busbar according to claim 3, characterized in that: The surface of the second side of the wiring portion (213) protrudes in a direction away from the first side of the wiring portion (213).

6. The integrated busbar according to claim 5, characterized in that: The height of the surface of the second side of the routing portion (213) protruding relative to the surface of the second side of the second insulating portion (212) in the second direction (Y) is H mm, and the value range of H is 5-12.

7. The integrated busbar according to claim 1, characterized in that: The second insulating portion (212) is provided with a plurality of the second avoidance holes (2121), and the plurality of the second avoidance holes (2121) are arranged at intervals in a third direction (Z), wherein the third direction (Z) is respectively perpendicular to the first direction (X) and the second direction (Y).

8. The integrated busbar according to any one of claims 1 to 7, characterized in that: The width of the wiring groove (2131) in the first direction (X) is W mm, and the value range of W is 5 to 12; And / or, the depth of the wiring groove (2131) in the second direction (Y) is D mm, and the value range of D is 5 to 12.

9. The integrated busbar according to any one of claims 1 to 7, characterized in that: The insulating support member (210) comprises two first insulating portions (211) and two wiring portions (213), and two ends of the second insulating portion (212) spaced apart in the first direction (X) are respectively connected to one of the first insulating portions (211) via one of the wiring portions (213).

10. The integrated busbar according to any one of claims 1 to 7, characterized in that: The insulating support member (210) is integrally formed.

11. The integrated busbar according to any one of claims 1 to 7, characterized in that: The material of the insulating support member (210) is selected from at least one of polycarbonate, polyethylene terephthalate, polyamide, polyetheretherketone, glass fiber reinforced plastic and ceramic.

12. The integrated busbar according to any one of claims 1 to 7, characterized in that: A blocking portion (2122) is convexly provided on the first side of the second insulating portion (212), the blocking portion (2122) is arranged around the second avoidance hole (2121), and the blocking portion (2122) is used to abut against the shell (110) of the battery cell (100).

13. A battery module, characterized in that: The invention comprises a battery cell (100) and an integrated busbar (200) as claimed in any one of claims 1 to 12, wherein the battery cell (100) comprises an explosion-proof valve (112) and a pole (120), wherein the explosion-proof valve (112) is located on a first side of the second insulating portion (212) and is opposite to the second avoidance hole (2121), and the pole (120) is passed through the first avoidance hole (2111) and is connected to the busbar (230).

14. An electrical device, characterized in that: Comprising the battery module as claimed in claim 13.

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