Integrated busbar, battery pack and electrical equipment

Abstract

The application provides an integrated busbar, a battery pack and an electrical equipment, the integrated busbar comprising a bracket assembly, a busbar and a collection wire harness. The bracket assembly is used for being mounted on a battery cell and comprises a base frame and a cover plate, the base frame is provided with a mounting groove and a glue accommodating groove which are arranged separately, a wire passing hole is communicated between the mounting groove and the glue accommodating groove, the glue accommodating groove is used for accommodating a heat-conducting glue, and the cover plate is mounted on the base frame. The busbar is mounted in the glue accommodating groove to be in heat-conducting contact with the heat-conducting glue, and the busbar is used for being electrically connected with the battery cell. The collection wire harness is mounted in the mounting groove, and a collection wire part passes through the wire passing hole and is electrically connected with the battery cell. The cover plate further covers a part of the wire passing hole. The integrated busbar provided by the application can solve the technical problem that the amount of heat-conducting glue overflowing from the wire passing hole to the glue accommodating groove is large.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to an integrated busbar, a battery pack and an electrical equipment. BACKGROUND

[0002] In the related art, a glue accommodating groove is arranged on the integrated busbar in the battery pack, the glue accommodating groove is used for accommodating heat-conducting glue, and a busbar for electrically connecting with the battery cell is installed in the glue accommodating groove, so that the heat-conducting glue can be in heat-conducting contact with the busbar, and then the heat on the busbar is conducted out, so as to avoid the temperature of the busbar and the battery cell being too high. At the same time, in order to facilitate the collection wire harness to be electrically connected with the busbar, a wire passing hole is also formed in the side wall of the glue accommodating groove, and the collection wire harness is partially inserted through the wire passing hole and electrically connected with the busbar. However, since the wire passing hole is relatively large, when the heat-conducting glue is injected into the glue accommodating groove, a relatively large amount of heat-conducting glue will overflow from the wire passing hole to the outside of the glue accommodating groove, which leads to a relatively large amount of heat-conducting glue being used and a relatively high production cost. SUMMARY

[0003] Embodiments of the present application provide an integrated busbar, a battery pack and an electrical equipment, which can solve the technical problem that a large amount of heat-conducting glue overflows from the wire passing hole to the outside of the glue accommodating groove.

[0004] In a first aspect, embodiments of the present application provide an integrated busbar, which comprises a bracket assembly, a busbar and a collection wire harness. The bracket assembly is used for being installed on a battery cell and comprises a base frame and a cover plate. The base frame is provided with a mounting groove and a glue accommodating groove which are separately arranged, and a wire passing hole is formed between the mounting groove and the glue accommodating groove. The glue accommodating groove is used for accommodating heat-conducting glue, and the cover plate is installed on the base frame. The busbar is installed in the glue accommodating groove to be in heat-conducting contact with the heat-conducting glue, and the busbar is used for being electrically connected with the battery cell. The collection wire harness is installed in the mounting groove, and a part of the collection wire harness is inserted through the wire passing hole and electrically connected with the battery cell. In addition, the cover plate also covers a part of the wire passing hole.

[0005] In an embodiment, the cover plate is provided with a first side plate, and the first side plate is at least partially located in the mounting groove and covers a part of the wire passing hole. In addition, or alternatively, the cover plate is provided with a second side plate, and the second side plate is at least partially located in the glue accommodating groove and covers a part of the wire passing hole.

[0006] In an embodiment, the cover plate is provided with a second side plate, and the second side plate is at least partially located in the glue accommodating groove and covers a part of the wire passing hole. In addition, the second side plate is also pressed on the busbar.

[0007] In an embodiment, the acquisition wire bundle comprises a main wire body and a branch wire body connected to each other, the main wire body extends in the mounting groove, and the branch wire body passes through the wire passing hole and is electrically connected with the busbar; the cover plate is further provided with a pressing plate body, which is located in the mounting groove and is pressed on the main wire body.

[0008] In an embodiment, the bracket assembly is used for mounting on an electric core, and the bracket assembly is provided with a liquid collecting groove and a liquid outlet hole, the liquid collecting groove has a first groove bottom, one end of the liquid outlet hole is used for corresponding to the explosion-proof valve of the electric core, and the other end penetrates through the first groove bottom and communicates with the liquid collecting groove.

[0009] In an embodiment, the bracket assembly is further provided with an annular blocking wall, the annular blocking wall is arranged around the liquid outlet hole, and the annular blocking wall at least partially protrudes from the first groove bottom.

[0010] In an embodiment, the bracket assembly comprises a base frame and a cover plate, the base frame is provided with a mounting groove, the mounting groove is provided with the liquid outlet hole and the annular blocking wall, and the cover plate is mounted in the mounting groove and is provided with the liquid collecting groove; the first groove bottom is provided with an assembly hole, and the annular blocking wall penetrates through the assembly hole and protrudes relative to the first groove bottom.

[0011] In an embodiment, the annular blocking wall has a top end and a bottom end opposite in the axial direction thereof, the top end is located in the liquid collecting groove, the bottom end is connected with the base frame, and the outer circumference of the annular blocking wall gradually increases in the direction from the top end to the bottom end; the inner circumference of the assembly hole has a circumference greater than that of the outer circumference of the top end and less than or equal to that of the outer circumference of the bottom end.

[0012] In an embodiment, the first groove bottom is at least partially inclined to guide the electrolyte to a preset position.

[0013] In an embodiment, the liquid collecting groove has a first groove opening opposite to the first groove bottom, and the liquid collecting groove has a first end and a second end opposite in the length direction thereof, the second end is provided with a liquid outlet, and the first groove bottom is inclined to the direction away from the first groove opening while extending from the first end to the second end.

[0014] In an embodiment, the mounting groove has a second groove bottom and a second groove opening opposite to each other, the liquid outlet hole penetrates through the second groove bottom, and the annular blocking wall extends from the second groove bottom to the second groove opening; the first groove bottom or the cover plate is inclined relative to the second groove bottom to guide the electrolyte to a preset position.

[0015] In an embodiment, the glue accommodating groove has opposite third groove bottoms on which a plurality of the busbars are arranged, each of the busbars has a heat-conducting plane facing the third groove opening, and an insulating boss is arranged between two adjacent busbars; a top surface of the insulating boss is convex relative to the heat-conducting plane and faces the third groove opening, or the top surface of the insulating boss is flush with the heat-conducting plane.

[0016] In a second aspect, embodiments of the present application provide a battery pack, which comprises a battery cell assembly, a heat-conducting glue, a cooling plate and the integrated busbar of any of the above embodiments, the battery cell assembly comprises a plurality of battery cells, the integrated busbar is arranged on the battery cell assembly, and the busbars are electrically connected to the battery cells. The heat-conducting glue is accommodated in the glue accommodating groove and is in heat-conducting contact with the busbars, and the cooling plate is arranged on a side of the integrated busbar away from the battery cell assembly and is in heat-conducting contact with the heat-conducting glue.

[0017] In a third aspect, embodiments of the present application provide an electrical device, which comprises the above battery pack.

[0018] The beneficial effects of embodiments of the present application are as follows:

[0019] In embodiments of the present application, by arranging the bracket assembly to comprise a base frame and a cover plate, the cover plate is arranged on the base frame and covers a part of the wire passing hole, so that the opening area of the wire passing hole can be reduced on the basis of ensuring that the wire harness can pass through the wire passing hole and be electrically connected to the busbar, thereby reducing the amount of heat-conducting glue overflowing from the glue accommodating groove through the wire passing hole, avoiding excessive use of heat-conducting glue, and reducing production cost.

[0020] Other features and advantages of the present application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0022] Figure 1 is a structural schematic diagram of an embodiment of the integrated busbar of the present application;

[0023] Figure 2 is Figure 1 a partial structural schematic diagram of the integrated busbar in

[0024] Figure 3 is Figure 2A structural schematic view of the chassis, busbar and collection harness in

[0025] Figure 4 A structural schematic view of the cover plate in Figure 2

[0026] Figure 5 A structural sectional view of an embodiment of the integrated busbar of the present application;

[0027] Figure 6 A structural sectional view of an embodiment of the battery pack of the present application. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, and specifically refer to the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the outline of the device.

[0029] To improve the technical problem that the amount of heat-conducting glue overflowing from the wire passing hole into the glue containing groove is large, in a first aspect, as shown in Figure 1 and Figure 2 An embodiment of the present application provides an integrated busbar 100, which comprises a support assembly 10, a busbar 20 and a collection harness 30.

[0030] The support assembly 10 is used to be mounted on an electric core 211, and the support assembly 10 comprises a chassis 11 and a cover plate 12. As shown in Figure 3 The chassis 11 is provided with a mounting groove 113 and a glue containing groove 114 which are separately arranged, and a wire passing hole 1133 is in communication between the mounting groove 113 and the glue containing groove 114. The glue containing groove 114 is used to contain heat-conducting glue 213. The busbar 20 is mounted in the glue containing groove 114 to be in heat-conducting contact with the heat-conducting glue 213, and the busbar 20 is used to be electrically connected with the electric core 211. The collection harness 30 is mounted in the mounting groove 113, and the collection harness is partially passed through the wire passing hole 1133 and electrically connected with the busbar 20.

[0031] Specifically, in Figure 3 ​In the structural scheme shown, the base frame 11 is made of insulating material, and the base frame 11 is provided with a mounting groove 113 and two glue containing grooves 114, the two glue containing grooves 114 are respectively located on both sides of the width direction of the mounting groove 113, and the mounting groove 113 and any one of the glue containing grooves 114 are separated by a partition plate.

[0032] A plurality of busbars 20 are installed in each glue containing groove 114, and in order to facilitate the electrical connection of the busbar 20 with the battery cell 211 below the base frame 11, the groove bottom of the glue containing groove 114 can be provided with a through hole, and the busbar 20 is electrically connected with the battery cell 211 at the position of the through hole. It should be noted that the busbar 20 can be an aluminum bar, a copper bar or other conductive material, and the busbar 20 is used to connect a plurality of battery cells 211 in series or parallel, and the specific connection mode can be flexibly selected as needed.

[0033] The collection wire harness 30 is used to collect the voltage, current, temperature and other information of the battery cell 211, and transmit the collected information to the battery management system, so as to better control the working of the battery cell 211 according to the voltage, current, temperature and other information of the battery cell 211.

[0034] As shown in Figure 3 The collection wire harness 30 is installed in the mounting groove 113, and the glue containing groove 114 and the mounting groove 113 are also communicated with the wire passing hole 1133, and the collection wire harness 30 part passes through the wire passing hole 1133 and is electrically connected with the battery cell 211, so that the collection wire harness 30 does not need to first stretch out of the mounting groove 113 and then stretch into the glue containing groove 114, so that the connection between the collection wire harness 30 and the busbar 20 will be more convenient.

[0035] Specifically, the collection wire harness 30 includes a main line body 31 and a branch line body 32 connected with each other, the main line body 31 extends in the mounting groove 113, and the branch line body 32 passes through the wire passing hole 1133 and is electrically connected with the busbar 20, and the wire passing hole 1133 is adapted to the branch line body 32 in position and number, for example, when the branch line body 32 is provided with a plurality of wire passing holes 1133, the wire passing hole 1133 is also provided with a plurality of wire passing holes 1133, and the plurality of wire passing holes 1133 correspond to the plurality of branch line bodies 32 one by one. It should be noted that the main line body 31 and the branch line body 32 can be cylindrical or sheet-shaped (for example, the main line body 31 and the branch line body 32 are formed by a flexible circuit board).

[0036] It should be noted that after the collection wire harness 30 passes through the wire passing hole 1133, it can be directly connected to the pole of the battery cell 211, thereby realizing the electrical connection with the battery cell 211. Alternatively, because the busbar 20 is electrically connected with the battery cell 211, the collection wire harness 30 can also be connected to the busbar 20, and then the voltage, current, temperature and other information of the battery cell 211 is collected through the busbar 20.

[0037] It can be combined with Figure 3 andFigure 6 It should be understood that the glue groove 114 is also used to accommodate the heat-conducting glue 213. In actual production, the heat-conducting glue 213 can be injected into the glue groove 114 and cover the busbar 20, so that the heat-conducting contact between the busbar 20 and the heat-conducting glue 213 is achieved, and the heat-conducting glue 213 can conduct the heat on the busbar 20 away, such as to the cooling plate 214 in contact with it, to avoid the temperature of the busbar 20 and the battery cell 211 being too high.

[0038] Key, in this embodiment, please combine Figure 2 and Figure 5 It should be understood that when the cover plate 12 is installed on the frame, the cover plate 12 also covers part of the wire passing hole 1133. Specifically, the cover plate 12 at least partially blocks the aperture of the wire passing hole 1133, or the cover plate 12 at least partially fills into the wire passing hole 1133, so that the opening area of the wire passing hole 1133 is reduced, and the amount of heat-conducting glue 213 overflowing from the wire passing hole 1133 into the glue groove 114 is reduced, avoiding excessive use of heat-conducting glue 213 and reducing production cost.

[0039] It should be noted that the specific structure of the cover plate 12 can be flexibly selected as needed, as long as it can cover part of the wire passing hole 1133.

[0040] For example, in an embodiment, as shown in Figure 5 , the cover plate 12 is provided with a first side plate 124, which is at least partially located in the installation groove 113 and covers part of the wire passing hole 1133. That is, in this embodiment, the cover plate 12 blocks the aperture of the wire passing hole 1133 close to the installation groove 113, thereby reducing the amount of heat-conducting glue 213 flowing out of the wire passing hole 1133. It should be noted that in order to improve the blocking effect of the first side plate 124 on the wire passing hole 1133, the first side plate 124 can be attached to the side wall of the installation groove 113, so that the gap between the first side plate 124 and the wire passing hole 1133 is reduced, further reducing the amount of heat-conducting glue 213 overflowing.

[0041] For another example, in another embodiment, as shown in Figure 5 , the cover plate 12 is provided with a second side plate 122, which is at least partially located in the glue groove 114 and covers part of the wire passing hole 1133. That is, in this embodiment, the cover plate 12 blocks the aperture of the wire passing hole 1133 close to the glue groove 114, thereby reducing the amount of heat-conducting glue 213 flowing out of the wire passing hole 1133. It should be noted that in order to improve the blocking effect of the second side plate 122 on the wire passing hole 1133, the second side plate 122 can be attached to the side wall of the glue groove 114, so that the gap between the second side plate 122 and the wire passing hole 1133 is reduced, further reducing the amount of heat-conducting glue 213 overflowing.

[0042] For another example, in another embodiment, as shown in Figure 5 the cover plate 12 is provided with a first side plate 124 and a second side plate 122 at the same time, the first side plate 124 and the second side plate 122 are arranged at intervals, and the first side plate 124 and the second side plate 122 are connected through a connecting plate body 126, wherein the first side plate 124 is at least partially located in the mounting groove 113 and covers a part of the wire passing hole 1133, and the second side plate 122 is at least partially located in the glue containing groove 114 and covers a part of the wire passing hole 1133. That is, in this embodiment, the cover plate 12 not only shields the side hole of the wire passing hole 1133 close to the mounting groove 113, but also shields the side hole of the wire passing hole 1133 close to the glue containing groove 114, which can achieve better glue blocking effect, thereby reducing the overflow amount of the thermal conductive glue 213 and reducing the production cost.

[0043] Optionally, in an embodiment, as shown in Figure 2 and Figure 5 understand that the cover plate 12 is provided with a second side plate 122, the second side plate 122 is at least partially located in the glue containing groove 114 and covers a part of the wire passing hole 1133, and the second side plate 122 is also pressed on the bus bar 20. That is, in this embodiment, the second side plate 122 not only shields the wire passing hole 1133 to reduce the overflow amount of the thermal conductive glue 213, but also limits the bus bar 20, so that the chassis 11 does not need to be additionally provided with other structures for limiting the bus bar 20, so that the structure of the chassis 11 is simpler.

[0044] Optionally, in an embodiment, as shown in Figure 5 the collection wire harness 30 includes a main wire body 31 and a branch wire body 32 connected with each other, the main wire body 31 extends in the mounting groove 113, and the branch wire body 32 passes through the wire passing hole 1133 and is electrically connected with the bus bar 20; the cover plate 12 is also provided with a pressing plate body 125, which is located in the mounting groove 113 and is pressed on the main wire body 31. That is, in this embodiment, when the cover plate 12 is installed on the chassis 11, the cover plate 12 not only shields the wire passing hole 1133 to reduce the overflow amount of the thermal conductive glue 213, but also limits the collection wire harness 30 at the same time, so that the chassis 11 does not need to be provided with other limiting structures for limiting the collection wire harness 30, thereby simplifying the structure of the chassis 11, hiding part of the collection wire harness 30 at the bottom of the cover plate 12, and limiting the collection wire harness 30 through the cover plate 12, so that the limiting process of the collection wire harness 30 is more simple and convenient, thereby improving the assembly efficiency.

[0045] Further, in order to solve the technical problem that the electrolyte sprayed from the explosion-proof valve is easy to cause the insulation performance of other components to fail or cause short circuit between two conductive components, as shown in Figure 1As shown, the support assembly 10 is also provided with a liquid collecting groove 121 and a liquid outlet hole 111, the liquid collecting groove 121 has a first groove bottom 1211, one end of the liquid outlet hole 111 is used to set the explosion-proof valve 212 corresponding to the battery cell 211 (for reference Figure 6 ), and the other end penetrates the first groove bottom 1211 and communicates with the liquid collecting groove 121.

[0046] Specifically, in the embodiment, the support assembly 10 is mainly used to support and position the busbar 20, the collection harness 30 and other components, and then form a whole with the busbar 20, the collection harness 30 and other components, and then be installed on the battery cell assembly together, so as to improve the assembly efficiency.

[0047] In an embodiment, as Figure 2 shown, Figure 2 is a partial structure diagram of the integrated busbar in Figure 1 , the support assembly 10 includes a chassis 11 and a cover plate 12, both of which are made of insulating material, the chassis 11 is used to install the busbar 20, the collection harness 30 and other components, and then install the busbar 20, the collection harness 30 and other components on the battery cell assembly together. When the chassis 11 is installed on the battery cell assembly, the busbar 20 on the chassis 11 electrically connects the plurality of battery cells 211 in the battery cell assembly to realize the series or parallel connection between the plurality of battery cells 211.

[0048] For reference Figure 5 and Figure 6 , the battery cell assembly includes a plurality of battery cells 211, each of which is provided with an explosion-proof valve 212, the chassis 11 is provided with a liquid outlet hole 111 at a position corresponding to the explosion-proof valve 212, and the cover plate 12 is detachably installed on the chassis 11, and can be combined Figure 4 , the cover plate 12 is provided with a liquid collecting groove 121, the liquid collecting groove 121 has a first groove bottom 1211, the first groove bottom 1211 penetrates an assembly hole 123, and the assembly hole 123 is arranged corresponding to the liquid outlet hole 111. Therefore, when the electrolyte in the battery cell 211 is sprayed out through the explosion-proof valve 212, the electrolyte will be sprayed into the liquid collecting groove 121 through the liquid outlet hole 111, and then the sprayed electrolyte will be left in the liquid collecting groove 121.

[0049] As can be seen, in the above embodiment, the support assembly 10 includes two components of the chassis 11 and the cover plate 12, and the liquid outlet hole 111 and the liquid collecting groove 121 are arranged on the chassis 11 and the cover plate 12 respectively.

[0050] Of course, the liquid outlet hole 111 and the liquid collecting groove 121 can also be arranged on the same component, such as in another embodiment, the Figure 3 can be referred to, the liquid collecting groove 121 and the liquid outlet hole 111 are directly formed on the chassis 11, and the liquid outlet hole 111 is located at the groove bottom of the liquid collecting groove 121 and penetrates the groove bottom of the liquid collecting groove 121.

[0051] Alternatively, in other embodiments, the bracket assembly 10 still comprises the base frame 11 and the cover plate 12, and the cover plate 12 is also detachably mounted on the base frame 11, but the base frame 11 is hollowed out at the position corresponding to the cover plate 12, and the liquid outlet hole 111 and the liquid collecting groove 121 are both arranged on the cover plate 12, and the liquid outlet hole 111 penetrates the groove bottom of the liquid collecting groove 121 and is arranged corresponding to the explosion-proof valve 212 of the battery cell 211.

[0052] In summary, the arrangement mode of the liquid outlet 1215 and the liquid collecting groove 121 in the present application can be various, and can be flexibly selected according to the needs in actual implementation.

[0053] It should be noted here that the battery cell assembly comprises a plurality of battery cells 211, each of which is provided with an explosion-proof valve 212, and therefore a plurality of liquid outlet holes 111 are correspondingly arranged on the bracket assembly 10, the plurality of liquid outlet holes 111 are arranged one-to-one corresponding to the plurality of explosion-proof valves 212, and one end of the plurality of liquid outlet holes 111 penetrates the groove bottom of the liquid collecting groove 121 and communicates with the liquid collecting groove 121, so as to ensure that when any one of the explosion-proof valves 212 is opened, the electrolyte sprayed through the explosion-proof valve 212 can be sprayed into the liquid collecting groove 121.

[0054] From the above, it can be understood that in the embodiments of the present application, by arranging the liquid collecting groove 121 and the liquid outlet hole 111 on the bracket assembly 10 of the integrated busbar 100, the liquid collecting groove 121 has a first groove bottom 1211, one end of the liquid outlet hole 111 is arranged corresponding to the explosion-proof valve 212 of the battery cell 211, and the other end penetrates the first groove bottom 1211 of the liquid collecting groove 121 and communicates with the liquid collecting groove 121, and then when the explosion-proof valve 212 of the battery cell 211 is opened and the electrolyte is sprayed through the explosion-proof valve 212, the electrolyte will be sprayed into the liquid collecting groove 121 through the liquid outlet hole 111, that is, the electrolyte is received in the liquid collecting groove 121, so as to avoid the electrolyte from splashing on other components in the battery pack, and to avoid the technical problems that the sprayed electrolyte causes the insulation performance of other components to fail or causes short circuit between two conductive components.

[0055] Optionally, in an embodiment, as shown in Figure 2 , the bracket assembly 10 is also provided with an annular barrier wall 112, which surrounds the liquid outlet hole 111 and is at least partially protruded from the first groove bottom 1211. Specifically, in the structural scheme shown in Figure 3 , the base frame 11 is provided with a mounting groove 113, the mounting groove 113 has a second groove bottom 1131 and a second groove opening 1132 opposite to each other, the second groove bottom 1131 penetrates the liquid outlet hole 111, one end of the annular barrier wall 112 is integrally connected with the base frame 11 and surrounds the liquid outlet hole 111, and the other end extends towards the second groove opening 1132.

[0056] Please refer toFigure 2 and Figure 4 The cover plate 12 is mounted in the mounting groove 113, and the cover plate 12 is provided with a liquid collecting groove 121, a first groove bottom 1211 of the liquid collecting groove 121 is provided with a fitting hole 123, when the cover plate 12 is assembled to the bottom frame 11, the fitting hole 123 is sleeved outside the annular retaining wall 112, the annular retaining wall 112 penetrates through the fitting hole 123 and protrudes relative to the first groove bottom 1211.

[0057] It can be understood that, in the embodiment, the annular retaining wall 112 is arranged around the liquid outlet hole 111 and protrudes relative to the first groove bottom 1211 of the liquid collecting groove 121, so that the electrolyte falling into the liquid collecting groove 121 can be prevented from flowing back into the battery cell 211, or the electrolyte falling into the liquid collecting groove 121 can be prevented from flowing to the top surface of the battery cell 211 through the liquid outlet hole 111, and further, the electrolyte can be prevented from corroding the insulating film arranged on the top surface of the battery cell 211.

[0058] It can be seen that, in the above embodiment, the annular retaining wall 112 is integrally formed with the bottom frame 11, and the “annular retaining wall 112 integrally formed with the frame” scheme can also be applied to the scheme of “the bottom frame 11 directly forming the liquid collecting groove 121 and the liquid outlet hole 111”.

[0059] Of course, in other embodiments, the annular retaining wall 112 can be arranged on the cover plate 12. Figure 4 For reference, the annular retaining wall 112 can also be arranged on the cover plate 12, specifically, the cover plate 12 is provided with the liquid collecting groove 121, the first groove bottom 1211 of the liquid collecting groove 121 is provided with the fitting hole 123, the fitting hole 123 is arranged opposite to the liquid outlet hole 111, one end of the annular retaining wall 112 is connected to the groove bottom of the liquid collecting groove 121 and arranged around the fitting hole 123, and the other end extends to the first groove opening 1212 of the liquid collecting groove 121. In this way, the annular retaining wall 112 also protrudes relative to the groove bottom of the liquid collecting groove 121, and further, the electrolyte falling into the liquid collecting groove 121 can be prevented from flowing out of the liquid collecting groove 121 through the liquid outlet hole 111.

[0060] Optionally, in an embodiment, reference can be made to Figure 2 Specifically, in the embodiment, when the electrolyte sprayed from the explosion-proof valve 212 is relatively large, or when the electrolyte accumulated in the liquid collecting groove 121 is relatively large over time, the electrolyte may overflow the liquid collecting groove 121 and flow to other positions of the battery pack, or the electrolyte may flow to the battery cell 211 through the liquid outlet hole 111 by crossing the annular retaining wall 112.

[0061] Therefore, in the embodiment, the first groove bottom 1211 of the collecting groove 121 is at least partially inclined, so that the electrolyte can be guided to a preset position. The preset position can be a position with a greater depth in the collecting groove 121 (for example, a specially arranged pit in the collecting groove 121), or a position in the battery pack that can store electrolyte (for example, a specially arranged cavity for storing electrolyte in the battery pack). In this way, the electrolyte can be prevented from overflowing from the collecting groove 121 or flowing onto the battery cell 211 through the liquid outlet hole 111 over the annular baffle wall 112.

[0062] Optionally, in an embodiment, as shown in Figure 2 the collecting groove 121 has a first groove opening 1212 opposite the first groove bottom 1211, and the collecting groove 121 has a first end 1213 and a second end 1214 opposite along the length direction of the collecting groove 121. The second end 1214 is provided with a liquid outlet 1215. The first groove bottom 1211 is inclined away from the first groove opening 1212 while extending from the first end 1213 to the second end 1214. That is, in the embodiment, the first groove bottom 1211 of the collecting groove 121 is integrally inclined along the length direction of the collecting groove 121. When the electrolyte falls into the collecting groove 121, the electrolyte will flow to the second end 1214 under the action of its own gravity and flow out of the liquid outlet 1215. In this way, the electrolyte can be guided out of the collecting groove 121 in time, and the accumulation of the electrolyte in the collecting groove 121 can be avoided.

[0063] It should be noted that a smaller cavity can be separated in the battery pack at a position corresponding to the liquid outlet 1215. The liquid outlet 1215 is in communication with the cavity, so that the electrolyte can be guided into the cavity. Alternatively, a liquid storage tank can be arranged in the battery pack at a position corresponding to the liquid outlet 1215. The liquid outlet 1215 is in communication with the liquid storage tank, so that the electrolyte can be guided into the liquid storage tank.

[0064] In addition, it should be noted that there are various ways to achieve the inclined arrangement of the first groove bottom 1211. For example, during production, the thickness of the first groove bottom 1211 at the first end 1213 is relatively thick, and the thickness of the first groove bottom 1211 at the second end 1214 is relatively thin. In the direction from the first end 1213 to the second end 1214, the thickness of the first groove bottom 1211 gradually decreases. In this way, the surface of the first groove bottom 1211 facing the first groove opening 1212 is an inclined surface, so that the electrolyte can flow to the liquid outlet 1215 at the second end 1214 under the action of its own gravity.

[0065] For example, the plate constituting the first tank bottom 1211 can be inclined relative to the first tank opening 1212, that is, the entire first tank bottom 1211 is inclined relative to the first tank opening 1212. In this case, whether the surface of the first tank bottom 1211 facing the first tank opening 1212 or the surface facing away from the first tank opening 1212, it is inclined relative to the first tank opening 1212. This also allows the electrolyte to flow along the first tank bottom 1211 to the outlet 1215 at the second end 1214 under its own gravity. In this case, the thickness of the plate constituting the first tank bottom 1211 can be set at all positions.

[0066] For example, alternatively, in one embodiment, such as Figure 3 As shown, the mounting groove 113 has a second groove bottom 1131 and a second groove opening 1132, with a liquid outlet 111 penetrating the second groove bottom 1131, and an annular baffle 112 extending from the second groove bottom 1131 to the second groove opening 1132. Please refer to... Figure 2 The cover plate 12 is detachably installed in the mounting groove 113. The liquid collection groove 121 is set on the cover plate 12. When the cover plate 12 is installed on the base frame 11, the cover plate 12 is tilted relative to the bottom of the second groove 1131. This also allows the bottom of the first groove 1211 to be tilted so as to guide the electrolyte to the outlet 1215.

[0067] Optionally, in one embodiment, such as Figure 5 As shown, based on the structure of "annular baffle 112 is set on base frame 11 and surrounds liquid outlet 111, and cover plate 12 is sleeved on the outside of annular baffle 112 through assembly hole 123", annular baffle 112 has a top end 1121 and a bottom end 1122 opposite to each other along its axial direction. Top end 1121 is located in liquid collection tank 121, and bottom end 1122 is connected to base frame 11. In the direction from top end 1121 to bottom end 1122, the circumference of the outer perimeter of annular baffle 112 gradually increases; the circumference of the inner perimeter of assembly hole 123 is greater than the circumference of the outer perimeter of top end 1121, and less than or equal to the circumference of the outer perimeter of bottom end 1122.

[0068] Specifically, in this embodiment, since the explosion-proof valve 212 on the battery cell 211 is elliptical, the liquid outlet 111, the annular baffle 112 and the assembly hole 123 are all designed to be elliptical. The annular baffle 112 has a top end 1121 and a bottom end 1122 along its axial direction. The top end 1121 is located in the liquid collection tank 121, and the bottom end 1122 is integrally connected to the base frame 11. In the direction from the top end 1121 to the bottom end 1122, the circumference of the outer perimeter of the annular baffle 112 gradually increases. That is, the annular baffle 112 has a conical structure that is smaller at the top and larger at the bottom.

[0069] Key, on the basis that the cross section of the annular retaining wall 112 and the assembly hole 123 are both oval, the inner circumference of the assembly hole 123 is longer than the outer circumference of the top end 1121, so that the top end 1121 of the annular retaining wall 112 can pass through the assembly hole 123 and be located in the sump 121. At the same time, the inner circumference of the assembly hole 123 is smaller than or equal to the outer circumference of the bottom end 1122, so that the closer the cover plate 12 is assembled, the tighter the annular retaining wall 112 is clamped in the assembly hole 123, which not only improves the stability of the cover plate 12, but also improves the assembly tightness between the annular retaining wall 112 and the assembly hole 123, avoiding leakage of electrolyte from the gap between the outer wall of the annular retaining wall 112 and the inner wall of the assembly hole 123.

[0070] Optionally, in an embodiment, as shown in Figure 2 and Figure 6 The chassis 11 is provided with a glue containing groove 114 on both sides of the mounting groove 113, and the glue containing groove 114 is used to contain the heat-conducting glue. The busbar 20 is installed in the glue containing groove 114, so that the busbar 20 can be covered by the heat-conducting glue. Specifically, in this embodiment, the busbar 20 needs to be installed in the glue containing groove 114 first, and then the heat-conducting glue is arranged in the glue containing groove 114. The cooling plate 214 can be arranged at the top of the battery pack, and the heat-conducting glue is in contact with the cooling plate 214. In this way, the heat of the battery cell 211 and the busbar 20 can be conducted to the cooling plate 214 through the heat-conducting glue, improving the heat dissipation efficiency of the battery cell 211.

[0071] Optionally, in an embodiment, as shown in Figure 2 The glue containing groove 114 has opposite third groove bottoms 1141 and third groove openings 1142. The third groove bottoms 1141 are provided with a plurality of busbars 20. Each busbar 20 has a heat-conducting plane 21 facing the third groove opening 1142. An insulating boss 40 is arranged between adjacent two busbars 20. The insulating boss 40 can increase the creepage distance between adjacent two busbars 20, thereby avoiding short circuit between adjacent two busbars 20.

[0072] Key, in this embodiment, the top surface of the insulating boss 40 protrudes towards the third groove opening 1142 relative to the heat-conducting plane 21, or the top surface of the insulating boss 40 is flush with the heat-conducting plane 21.

[0073] Specifically, when the heat-conducting glue is a liquid glue (the liquid heat-conducting glue will be solidified later), the top surface of the insulating boss 40 can protrude towards the third groove opening 1142 relative to the heat-conducting plane 21, so that the insulating boss 40 can occupy more space in the glue containing groove 114, thereby reducing the amount of heat-conducting glue and reducing the cost.

[0074] When the heat-conducting glue is in a semi-solid state, the top surface of the insulating boss 40 can be flush with the heat-conducting surface 21 of the busbar 20, so that the heat-conducting glue can be in full contact with the heat-conducting surface 21 of the busbar 20 on the basis of ensuring insulation, thereby ensuring the heat-conducting effect.

[0075] As shown in Figure 6 The battery pack 200 includes a battery cell assembly, an integrated busbar 100, heat-conducting glue 213, and a cooling plate 214. The battery cell assembly includes a plurality of battery cells 211. The integrated busbar 100 is installed on the battery cell assembly, and the busbar 20 is electrically connected to the battery cells 211. The heat-conducting glue 213 is accommodated in the glue accommodating groove 114 and is in heat-conducting contact with the busbar 20. The cooling plate 214 is installed on the side of the integrated busbar 100 away from the battery cell assembly, and the cooling plate 214 is in heat-conducting contact with the heat-conducting glue 213. In this way, the heat on the battery cells 211 and the busbar 20 can be transferred to the cooling plate 214 through the heat-conducting glue 213, and the heat can be taken away from the battery pack by the coolant flowing in the cooling plate 214, thereby achieving the cooling of the battery pack.

[0076] It should be noted that the battery cells 211 are provided with explosion-proof valves 212, and the integrated busbar 100 is installed on the battery cell assembly. The specific structure of the integrated busbar 100 is as described above. The liquid outlet hole 111 of the support assembly 10 is arranged opposite to the explosion-proof valve 212, so that when the electrolyte is sprayed out through the explosion-proof valve 212, the electrolyte can be sprayed into the liquid collecting groove 121 through the liquid outlet hole 111.

[0077] It can be understood that the battery pack 200 adopts all the technical solutions of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0078] The battery pack 200 includes a battery cell assembly and an integrated busbar 100. The specific structure of the integrated busbar 100 is as described above. It can be understood that the battery pack 200 adopts all the technical solutions of the above-mentioned embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0079] The electric equipment can be a car, a ship, an industrial equipment, a household appliance, or the like.

[0080] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application have been described by applying specific examples in this paper, the above embodiment description is only used for helping understanding the method of the application and its core idea; at the same time, for the person skilled in the art, according to the idea of the application, there will be changes in specific implementation mode and application range, and the above is described, the content of the specification should not be understood as the limitation of the application.

Claims

1. An integrated busbar, characterized in that, include: A bracket assembly for mounting on a battery cell includes a base frame and a cover plate. The base frame has a separately arranged mounting groove and an adhesive-containing groove, which are connected by a wire hole. The adhesive-containing groove is used to contain thermally conductive adhesive. The cover plate is mounted on the base frame. A busbar, installed within the adhesive reservoir, is in thermal contact with the thermally conductive adhesive, and the busbar is used for electrical connection to the battery cell; and, A data acquisition harness is installed in the mounting slot, and the data acquisition wire portion passes through the wire through hole and is electrically connected to the battery cell; The cover plate also covers a portion of the wire hole to reduce the opening area of ​​the wire hole; The cover plate is provided with a second side plate, which is pressed onto the busbar.

2. The integrated busbar according to claim 1, characterized in that, The cover plate is provided with a first side plate, which is at least partially located in the mounting groove and covers a portion of the wire hole, and / or, the second side plate is at least partially located in the adhesive groove and covers a portion of the wire hole.

3. The integrated busbar according to claim 1, characterized in that, The acquisition harness includes a main body and a branch body connected together. The main body extends into the mounting groove, and the branch body passes through the cable hole and is electrically connected to the busbar. The cover plate is also provided with a pressing plate, which is located in the mounting groove and pressed onto the main body.

4. The integrated busbar according to any one of claims 1-3, characterized in that, The support assembly is provided with a liquid collection tank and a liquid outlet. The liquid collection tank has a first tank bottom. One end of the liquid outlet is used to correspond to the explosion-proof valve of the battery cell, and the other end passes through the first tank bottom and communicates with the liquid collection tank.

5. The integrated busbar according to claim 4, characterized in that, The support assembly is also provided with an annular baffle wall, which surrounds the liquid outlet hole and at least partially protrudes from the bottom of the first tank.

6. The integrated busbar according to claim 5, characterized in that, The base frame is provided with an installation groove, and the installation groove is provided with the liquid outlet and the annular baffle; the cover plate is installed in the installation groove and is provided with the liquid collection groove, the bottom of the first groove is provided with an assembly hole, and the annular baffle passes through the assembly hole and protrudes relative to the bottom of the first groove.

7. The integrated busbar according to claim 6, characterized in that, The annular baffle has a top end and a bottom end opposite each other along its axial direction. The top end is located inside the liquid collection tank, and the bottom end is connected to the base frame. In the direction from the top end to the bottom end, the circumference of the outer perimeter of the annular baffle gradually increases. The circumference of the inner perimeter of the mounting hole is greater than the circumference of the outer perimeter of the top end, and less than or equal to the circumference of the outer perimeter of the bottom end.

8. The integrated busbar according to claim 4, characterized in that, The bottom of the first tank is at least partially inclined to guide the electrolyte to a preset position.

9. The integrated busbar according to claim 8, characterized in that, The liquid collection tank has a first opening opposite to the bottom of the first tank, and the liquid collection tank has a first end and a second end opposite to each other along its length direction. The second end is provided with a liquid outlet. The bottom of the first tank extends from the first end to the second end and also tilts away from the first opening.

10. The integrated busbar according to claim 6, characterized in that, The mounting groove has a second bottom and a second opening opposite each other. The liquid outlet hole passes through the second bottom of the groove, and the annular baffle extends from the second bottom of the groove to the second opening. The first bottom of the groove or the cover plate is inclined relative to the second bottom of the groove to guide the electrolyte to a preset position.

11. The integrated busbar according to any one of claims 1-3, characterized in that, The adhesive tank has a third bottom and a third opening. A plurality of busbars are installed on the third bottom. Each busbar has a heat-conducting plane facing the third opening, and an insulating boss is provided between two adjacent busbars. The top surface of the insulating boss protrudes toward the third opening relative to the heat-conducting plane, or the top surface of the insulating boss is flush with the heat-conducting plane.

12. A battery pack, characterized in that, include: Battery cell assembly, comprising multiple battery cells; The integrated busbar as described in any one of claims 1-11 is mounted on the battery cell assembly, and the busbar is electrically connected to the battery cell; Thermally conductive adhesive is contained in the adhesive reservoir and makes thermal contact with the manifold. as well as, A cooling plate is installed on the side of the integrated busbar opposite to the cell assembly, and the cooling plate is in thermal contact with the thermally conductive adhesive.

13. An electrical appliance, characterized in that, Includes the battery pack as described in claim 12.

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