Integrated busbar, battery pack and electric equipment

Abstract

The invention provides an integrated busbar, a battery pack and electric equipment. The integrated busbar comprises a bracket assembly, a busbar and an acquisition wire harness, the support assembly is used for being installed on a battery cell and comprises a bottom frame and a cover plate, the bottom frame is provided with an installation groove and a glue containing groove which are arranged in a separated mode, a wire passing hole is communicated between the installation groove and the glue containing groove, the glue containing groove is used for containing heat-conducting glue, and the cover plate is installed on the bottom frame. The busbar is mounted in the glue accommodating groove so as 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 acquisition wire harness is mounted in the mounting groove, and the acquisition wire harness partially penetrates through the wire passing hole and is electrically connected with the battery cell. Wherein the cover plate also covers a part of the wire passing hole. According to the integrated busbar provided by the invention, the technical problem that the amount of heat-conducting glue overflowing from the wire passing hole to the glue accommodating groove is large can be solved.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to an integrated busbar, a battery pack and an electrical device. Background Art

[0002] In the related art, a glue groove is provided on the integrated busbar in the battery pack, and the glue groove is used to accommodate thermally conductive glue, and the busbar electrically connected to the battery cell is installed in the glue groove, so that the thermally conductive glue can be in thermal contact with the busbar, and then the heat on the busbar is discharged to avoid the busbar and the battery cell from being too high in temperature. At the same time, in order to facilitate the electrical connection of the collection harness with the busbar, a wire-passing hole is also penetrated on the side wall of the glue groove, and the collection harness part passes through the wire-passing hole and is electrically connected to the busbar. However, due to the large wire-passing hole, when the thermally conductive glue is injected into the glue groove, the amount of thermally conductive glue overflowing from the wire-passing hole and the glue groove is relatively large, which leads to a large amount of thermally conductive glue used and a high production cost. Summary of the invention

[0003] The embodiments of the present invention provide an integrated busbar, a battery pack and an electrical device, which can improve the technical problem that a large amount of thermal conductive adhesive overflows from the wire hole into the adhesive storage groove.

[0004] In the first aspect, an embodiment of the present invention provides an integrated busbar, which includes a bracket assembly, a busbar and a collection harness. The bracket assembly is used to be installed on the battery cell, and includes a base frame and a cover plate, the base frame is provided with a mounting groove and a glue holding groove which are separated, and a wire passing hole is connected between the mounting groove and the glue holding groove, the glue holding groove is used to hold thermally conductive glue, and the cover plate is installed on the base frame. The busbar is installed in the glue holding groove to be in thermal contact with the thermally conductive glue, and the busbar is used to be electrically connected to the battery cell. The collection harness is installed in the mounting groove, and the collection line part passes through the wire passing hole and is electrically connected to the battery cell. Wherein, the cover plate also covers a part of the wire passing hole.

[0005] In one embodiment, the cover plate is provided with a first side plate, which is at least partially located in the installation groove and covers a portion of the wire hole, and / or the cover plate is provided with a second side plate, which is at least partially located in the glue containing groove and covers a portion of the wire hole.

[0006] In one embodiment, the cover plate is provided with a second side plate, the second side plate is at least partially located in the glue containing groove and covers a portion of the wire through hole, and the second side plate is also pressed onto the bus bar.

[0007] In one embodiment, the collection harness includes a main line body and a branch line body connected to each other, the main line body extends into the installation groove, the branch line body passes through the wire hole and is electrically connected to the bus; the cover plate is also provided with a pressing plate body, the pressing plate body is located in the installation groove and pressed onto the main line body.

[0008] In one embodiment, the bracket assembly is used to be installed on the battery cell, and the bracket assembly is provided with a liquid collecting tank and a liquid outlet, the liquid collecting tank has a first tank bottom, one end of the liquid outlet is used to correspond to the explosion-proof valve setting of the battery cell, and the other end passes through the first tank bottom and is connected to the liquid collecting tank.

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

[0010] In one embodiment, the bracket assembly includes 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 and the annular retaining wall; the cover plate is installed in the mounting groove and is provided with the liquid collecting groove, the bottom of the first groove is provided with an assembly hole, the annular retaining wall passes through the assembly hole and protrudes relative to the bottom of the first groove.

[0011] In one embodiment, the annular retaining wall has a top end and a bottom end opposite to each other along its axial direction, the top end is located in the liquid collecting tank, and the bottom end is connected to the base frame, and the circumference of the outer periphery of the annular retaining wall gradually increases in the direction from the top end to the bottom end; the circumference of the inner periphery of the assembly hole is greater than the circumference of the outer periphery of the top end, and is less than or equal to the circumference of the outer periphery of the bottom end.

[0012] In one embodiment, at least a portion of the first tank bottom is tilted to guide the electrolyte to a preset position.

[0013] In one embodiment, the liquid collecting trough has a first slot opposite to the first slot bottom, and the liquid collecting trough 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, and the first slot bottom extends from the first end to the second end while also inclining in a direction away from the first slot.

[0014] In one embodiment, the mounting groove has a second groove bottom and a second groove opening relative to each other, the liquid outlet passes through the second groove bottom, and the annular retaining 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 one embodiment, the glue containing groove has a relative third groove bottom and a third notch, and a plurality of the bus bars are installed on the third groove bottom, each of the bus bars has a heat-conducting plane facing the third notch, and an insulating boss is provided between two adjacent bus bars; the top surface of the insulating boss protrudes toward the third notch relative to the heat-conducting plane, or the top surface of the insulating boss is flush with the heat-conducting plane.

[0016] In a second aspect, an embodiment of the present invention provides a battery pack, the battery pack comprising a battery cell assembly, a thermally conductive adhesive, a cooling plate, and an integrated busbar as described in any one of the above embodiments, the battery cell assembly comprising a plurality of battery cells, the integrated busbar being mounted on the battery cell assembly, and the busbar being electrically connected to the battery cells. The thermally conductive adhesive is contained in the adhesive container and is in thermal contact with the busbar, the cooling plate is mounted on a side of the integrated busbar that is away from the battery cell assembly, and the cooling plate is in thermal contact with the thermally conductive adhesive.

[0017] In a third aspect, an embodiment of the present invention provides an electrical device, wherein the electrical device includes the above-mentioned battery pack.

[0018] Beneficial effects of the embodiments of the present invention: In an embodiment of the present invention, the bracket assembly includes a base frame and a cover plate, and the cover plate is installed on the base frame and covers a portion of the wire hole. In this way, the opening area of ​​the wire hole can be reduced while ensuring that the collection harness can be electrically connected to the bus through the wire hole, thereby reducing the amount of thermal conductive adhesive overflowing from the adhesive containing groove from the wire hole, avoiding excessive use of thermal conductive adhesive, and reducing production costs.

[0019] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a structural schematic diagram of an embodiment of an integrated busbar of the present application; Figure 2 yes Figure 1 A partial structural diagram of the integrated busbar; Figure 3 yes Figure 2 A schematic diagram of the structure of the chassis, busbars and collection harness; Figure 4 yes Figure 2 A schematic diagram of the structure of the cover plate; Figure 5 This is a structural cross-sectional view of an embodiment of an integrated busbar of the present application; Figure 6 It is a structural cross-sectional view of an embodiment of a battery pack of the present application. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device.

[0023] In order to improve the technical problem that the amount of thermal conductive glue overflowing from the wire hole to the glue storage groove is large, firstly, Figure 1 and Figure 2 As shown, an embodiment of the present invention provides an integrated busbar 100 , which includes a bracket assembly 10 , a busbar 20 and a collection harness 30 .

[0024] The support assembly 10 is used to be installed on the battery cell 211, and the support assembly 10 includes a base frame 11 and a cover plate 12. Figure 3 As shown, the chassis 11 is provided with a mounting groove 113 and a glue holding groove 114 which are separated and connected, and a wire hole 1133 is connected between the mounting groove 113 and the glue holding groove 114, and the glue holding groove 114 is used to hold the thermal conductive glue 213. The bus 20 is installed in the glue holding groove 114 to be in thermal contact with the thermal conductive glue 213, and the bus 20 is used to be electrically connected to the battery cell 211. The collection harness 30 is installed in the mounting groove 113, and the collection wire part passes through the wire hole 1133 and is electrically connected to the bus 20.

[0025] Specifically, in Figure 3 In the structural scheme shown, the base frame 11 is made of insulating material, and 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 mounting groove 113 in the width direction, and the mounting groove 113 and any one of the glue containing grooves 114 are separated by a partition plate.

[0026] A plurality of busbars 20 are installed in each adhesive groove 114, and in order to facilitate the electrical connection between the busbars 20 and the battery cells 211 under the bottom frame 11, a through hole may be provided at the bottom of the adhesive groove 114, and the busbars 20 are electrically connected to the battery cells 211 at the positions of the through holes. It should be noted that the busbars 20 may be aluminum bars, copper bars or other conductive materials, and the busbars 20 are used to connect the plurality of battery cells 211 in series or in parallel, and the specific connection method may be flexibly selected as needed.

[0027] The collection harness 30 is used to collect information such as the voltage, current, and temperature of the battery cell 211 , and transmit the collected information to the battery management system, so as to better control the operation of the battery cell 211 based on the information such as the voltage, current, and temperature of the battery cell 211 .

[0028] like Figure 3 As shown, the collection harness 30 is installed in the installation groove 113, and a wire hole 1133 is connected between the glue holding groove 114 and the installation groove 113. The collection harness 30 partially passes through the wire hole 1133 and is electrically connected to the battery cell 211. In this way, the collection harness 30 does not need to extend upward from the installation groove 113 and then extend into the glue holding groove 114, which makes the connection between the collection harness 30 and the bus 20 more convenient.

[0029] Specifically, the collection harness 30 includes a main line body 31 and a branch line body 32 connected to each other. The main line body 31 extends in the installation groove 113. The branch line body 32 passes through the wire hole 1133 and is electrically connected to the bus 20. The wire hole 1133 is adapted to the branch line body 32 in position and quantity. For example, when there are multiple branch lines 32, there are also multiple wire holes 1133. The multiple wire holes 1133 correspond to the multiple branch lines 32 one by one. It should be noted here that the main line body 31 and the branch line body 32 can be cylindrical or sheet-like in shape (for example, the main line body 31 and the branch line body 32 are formed by a flexible circuit board).

[0030] It should be noted that after the collection harness 30 passes through the wire hole 1133, it can be directly connected to the pole of the battery cell 211, thereby achieving electrical connection with the battery cell 211. Alternatively, because the busbar 20 is electrically connected to the battery cell 211, the collection harness 30 can also be connected to the busbar 20, and then the voltage, current, temperature and other information of the battery cell 211 are collected through the busbar 20.

[0031] Can be combined Figure 3 and Figure 6It can be understood that the glue groove 114 is also used to accommodate the thermal conductive glue 213. In actual production, the thermal conductive glue 213 can be injected into the glue groove 114, and the thermal conductive glue 213 can cover the bus 20, so that thermal conductive contact between the bus 20 and the thermal conductive glue 213 can be achieved, and then the thermal conductive glue 213 can conduct the heat on the bus 20 away, for example, to the cooling plate 214 in contact with it, to avoid the temperature of the bus 20 and the battery cell 211 being too high.

[0032] The key point is that in this embodiment, please combine Figure 2 and Figure 5 It is understood that when the cover 12 is installed on the frame, the cover 12 also covers a portion of the wire hole 1133. Specifically, the cover 12 at least partially blocks the opening of the wire hole 1133, or the cover 12 at least partially fills the wire hole 1133. In this way, the opening area of ​​the wire hole 1133 can be reduced, thereby reducing the amount of thermal conductive adhesive 213 overflowing from the wire hole 1133 and the adhesive groove 114, thereby avoiding excessive use of thermal conductive adhesive 213 and reducing production costs.

[0033] It should be noted here that the specific structure of the cover plate 12 can be flexibly selected according to needs, as long as it can cover a part of the wire hole 1133.

[0034] For example, optionally, in one embodiment, Figure 5 As shown, the cover plate 12 is provided with a first side plate 124, and the first side plate 124 is at least partially located in the mounting groove 113 and covers a part of the wire hole 1133, that is, in this embodiment, the cover plate 12 blocks the opening of the wire hole 1133 on one side close to the mounting groove 113, thereby reducing the amount of the thermal conductive adhesive 213 flowing out of the wire hole 1133. It should be noted here that in order to improve the shielding effect of the first side plate 124 on the wire hole 1133, the first side plate 124 can fit the side wall of the mounting groove 113, so that the gap between the first side plate 124 and the wire hole 1133 can be reduced, and the overflow of the thermal conductive adhesive 213 can be further reduced.

[0035] For example, in another embodiment, Figure 5 As shown, the cover plate 12 is provided with a second side plate 122, 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 is used to block the opening of one side of the wire passing hole 1133 close to the glue containing groove 114, thereby reducing the amount of thermal conductive glue 213 flowing out of the wire passing hole 1133. It should be noted here that in order to improve the shielding effect of the second side plate 122 on the wire passing hole 1133, the second side plate 122 can fit the side wall of the glue containing groove 114, so that the gap between the second side plate 122 and the wire passing hole 1133 can be reduced, and the overflow of the thermal conductive glue 213 can be further reduced.

[0036] For example, in yet another embodiment, Figure 5 As shown, 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 by 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 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 hole 1133. That is to say, in this embodiment, the cover plate 12 not only blocks the opening of the wire hole 1133 on one side close to the mounting groove 113, but also blocks the opening of the wire hole 1133 on one side close to the glue containing groove 114, which can achieve a better glue blocking effect, thereby reducing the overflow of the thermal conductive glue 213 and reducing the production cost.

[0037] Optionally, in one embodiment, please combine Figure 2 and Figure 5 It is understood 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 adhesive groove 114 and covers a part of the wire hole 1133, and the second side plate 122 is also pressed on the bus 20. That is, in this embodiment, the second side plate 122 not only blocks the wire hole 1133 to reduce the overflow of the thermal conductive adhesive 213, but also limits the bus 20, so that there is no need to set other additional structures for limiting the bus 20 on the bottom frame 11, so that the structure of the bottom frame 11 is simpler.

[0038] Optionally, in one embodiment, as Figure 5 As shown, the collection harness 30 includes a main line body 31 and a branch line body 32 connected to each other, the main line body 31 extends into the installation groove 113, and the branch line body 32 passes through the wire hole 1133 and is electrically connected to the bus 20; the cover plate 12 is also provided with a pressing plate body 125, which is located in the installation groove 113 and pressed on the main line body 31. That is, in this embodiment, when the blocking cover plate 12 is installed on the base frame 11, the cover plate 12 not only blocks the wire hole 1133 to reduce the overflow of the thermal conductive glue 213, but also limits the collection harness 30 by the way, so that other limiting structures for limiting the collection harness 30 are not required on the base frame 11, the structure of the base frame 11 is simplified, and part of the collection harness 30 can be hidden at the bottom of the cover plate 12. In addition, the collection harness 30 is limited by the cover plate 12, so that the limiting process of the collection harness 30 is simpler and more convenient, thereby improving the assembly efficiency.

[0039] Furthermore, in order to solve the technical problem that the electrolyte sprayed out from the explosion-proof valve easily causes the insulation performance of other components to fail or causes a short circuit between two conductive components, such as Figure 1As shown, the bracket assembly 10 is also provided with a liquid collecting tank 121 and a liquid outlet 111. The liquid collecting tank 121 has a first tank bottom 1211. One end of the liquid outlet 111 is used to correspond to the explosion-proof valve 212 of the battery cell 211 (refer to Figure 6 ), and the other end passes through the first tank bottom 1211 and communicates with the liquid collecting tank 121.

[0040] Specifically, in this embodiment, the bracket assembly 10 is mainly used to support and position the bus 20, the collection harness 30 and other components, and then form a whole with the bus 20, the collection harness 30 and other components, and then installed together on the battery cell assembly, which can improve the assembly efficiency.

[0041] In one embodiment, if Figure 2 As shown, Figure 2 for Figure 1 The schematic diagram of the partial structure of the integrated busbar in FIG. 1 shows a support assembly 10 including a base frame 11 and a cover plate 12. The base frame 11 and the cover plate 12 are both made of insulating materials. The base frame 11 is used to install components such as a busbar 20 and a collection harness 30, and then is installed on a cell assembly together with the busbar 20 and the collection harness 30. When the base frame 11 is installed on the cell assembly, the busbar 20 on the base frame 11 electrically connects multiple cells 211 in the cell assembly to achieve series or parallel connection between the multiple cells 211.

[0042] You can refer to 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, and the bottom frame 11 is provided with a liquid outlet 111 at a position corresponding to the explosion-proof valve 212, and the cover plate 12 is detachably mounted on the bottom frame 11 and can be combined with Figure 4 The cover plate 12 is provided with a liquid collecting tank 121, and the liquid collecting tank 121 has a first tank bottom 1211, and the first tank bottom 1211 is penetrated by 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 tank 121 through the liquid outlet hole 111, and then the sprayed electrolyte will be retained in the liquid collecting tank 121.

[0043] It can be seen that in the above embodiments, the bracket assembly 10 includes two components, namely a base frame 11 and a cover plate 12 , and the liquid outlet 111 and the liquid collecting tank 121 are respectively arranged on the base frame 11 and the cover plate 12 .

[0044] Of course, the liquid outlet 111 and the liquid collecting tank 121 can also be arranged on the same component. For example, in other embodiments, Figure 3 For reference, a liquid collecting trough 121 and a liquid outlet 111 are directly formed on the bottom frame 11 . The liquid outlet 111 is located at the bottom of the liquid collecting trough 121 and passes through the bottom of the liquid collecting trough 121 .

[0045] Alternatively, in other embodiments, the bracket assembly 10 still includes a base frame 11 and a cover plate 12, and the cover plate 12 is also detachably mounted on the base frame 11. The difference is that a position on the base frame 11 corresponding to the cover plate 12 is hollowed out, and the liquid outlet 111 and the liquid collecting tank 121 are both arranged on the cover plate 12. The liquid outlet 111 passes through the bottom of the liquid collecting tank 121 and is arranged corresponding to the explosion-proof valve 212 of the battery cell 211.

[0046] In summary, there are many ways to configure the liquid outlet 1215 and the liquid collecting tank 121 in the present application, and they can be flexibly selected according to needs during actual implementation.

[0047] It should be noted here that the battery cell assembly includes multiple battery cells 211, each battery cell 211 is provided with an explosion-proof valve 212, so the bracket assembly 10 is correspondingly provided with multiple liquid outlet holes 111, and the multiple liquid outlet holes 111 are used to be arranged one-to-one with the multiple explosion-proof valves 212, and one end of the multiple liquid outlet holes 111 passes through the bottom of the liquid collecting tank 121 and is connected with the liquid collecting tank 121 to ensure that when any explosion-proof valve 212 is opened, the electrolyte sprayed through the explosion-proof valve 212 can be sprayed into the liquid collecting tank 121.

[0048] In summary, it can be understood that in an embodiment of the present invention, a liquid collecting tank 121 and a liquid outlet 111 are provided on the bracket assembly 10 of the integrated busbar 100, the liquid collecting tank 121 has a first tank bottom 1211, one end of the liquid outlet 111 is used to correspond to the explosion-proof valve 212 of the battery cell 211, and the other end passes through the first tank bottom 1211 of the liquid collecting tank 121 and is connected to the liquid collecting tank 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 tank 121 through the liquid outlet 111, that is, the electrolyte is received in the liquid collecting tank 121, so that the electrolyte can be prevented from splashing onto other components in the battery pack, thereby avoiding the technical problem that the sprayed electrolyte causes the insulation performance of other components to fail or causes a short circuit between two conductive components.

[0049] Optionally, in one embodiment, as Figure 2 As shown, the bracket assembly 10 is further provided with an annular retaining wall 112, which is arranged around the liquid outlet hole 111, and the annular retaining wall 112 at least partially protrudes from the first groove bottom 1211. Figure 3 In the structural scheme shown, a mounting groove 113 is provided on the base frame 11, and the mounting groove 113 has a second groove bottom 1131 and a second groove opening 1132 opposite to each other, and a liquid outlet 111 passes through the second groove bottom 1131, and one end of the annular retaining wall 112 is integrally connected to the base frame 11 and is arranged around the liquid outlet 111, and the other end extends toward the second groove opening 1132.

[0050] Please combine Figure 2 and Figure 4 The cover plate 12 is installed in the installation groove 113, and a liquid collecting groove 121 is provided on the cover plate 12. The first groove bottom 1211 of the liquid collecting groove 121 is penetrated by an assembly hole 123. When the cover plate 12 is assembled to the base frame 11, the assembly hole 123 is sleeved on the outside of the annular retaining wall 112, and the annular retaining wall 112 passes through the assembly hole 123 and protrudes relative to the first groove bottom 1211.

[0051] It can be understood that in this embodiment, an annular retaining wall 112 is provided, which surrounds the circumference of the liquid outlet 111 and protrudes relative to the first groove bottom 1211 of the liquid collecting groove 121. In this way, the electrolyte falling into the liquid collecting groove 121 can be prevented from flowing back into the battery cell 211, or the electrolyte falling in the liquid collecting groove 121 can be prevented from flowing to the top surface of the battery cell 211 through the liquid outlet 111, thereby preventing the electrolyte from corroding the insulating film arranged on the top surface of the battery cell 211.

[0052] It can be seen that in the above embodiments, the annular retaining wall 112 is integrally formed with the base frame 11, and this "annular retaining wall 112 and the frame body are integrally formed" solution can also be applied to the "base frame 11 directly forms the liquid collecting tank 121 and the liquid outlet 111" solution.

[0053] Of course, in other embodiments, 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 a liquid collecting tank 121. The first bottom 1211 of the liquid collecting tank 121 is penetrated with an assembly hole 123. The assembly hole 123 is arranged opposite to the liquid outlet 111. One end of the annular retaining wall 112 is connected to the bottom of the liquid collecting tank 121 and is arranged around the assembly hole 123, and the other end extends to the first notch 1212 of the liquid collecting tank 121. In this way, the annular retaining wall 112 also protrudes relative to the bottom of the liquid collecting tank 121, thereby preventing the electrolyte falling into the liquid collecting tank 121 from flowing out of the liquid collecting tank 121 through the liquid outlet 111.

[0054] Optionally, in one embodiment, reference may be made to Figure 2 , the first tank bottom 1211 is at least partially inclined to guide the electrolyte to a preset position. Specifically, in this embodiment, when a large amount of electrolyte is sprayed out from the explosion-proof valve 212, or when a large amount of electrolyte is accumulated in the liquid collecting tank 121 over time, the electrolyte may overflow the liquid collecting tank 121 and flow to other positions of the battery pack, or the electrolyte may pass over the annular retaining wall 112 and flow to the battery cell 211 through the liquid outlet 111.

[0055] Therefore, in this embodiment, the first bottom 1211 of the liquid collecting tank 121 is at least partially inclined, so that the electrolyte can be guided to a preset position. This "preset position" can be a deeper position in the liquid collecting tank 121 (such as a pit specially arranged in the liquid collecting tank 121), or a position in the battery pack where the electrolyte can be stored (such as a compartment specially provided in the battery pack for storing the electrolyte). This can prevent the electrolyte from overflowing the liquid collecting tank 121, or flowing over the annular retaining wall 112 and onto the battery cell 211 through the liquid outlet 111.

[0056] Optionally, in one embodiment, as Figure 2 As shown, the liquid collecting tank 121 has a first notch 1212 opposite to the first tank bottom 1211, and the liquid collecting tank 121 has a first end 1213 and a second end 1214 opposite to each other along its length direction, and the second end 1214 is provided with a liquid outlet 1215, and the first tank bottom 1211 is extended from the first end 1213 to the second end 1214, and is also inclined in a direction away from the first notch 1212. That is, in this embodiment, the first tank bottom 1211 of the liquid collecting tank 121 is arranged to be tilted as a whole along its length direction, and when the electrolyte falls into the liquid collecting tank 121, the electrolyte will flow to the second end 1214 under the action of its own gravity, and flow out from the liquid outlet 1215, so that the electrolyte can be timely guided out of the liquid collecting tank 121 to avoid the electrolyte from accumulating in the liquid collecting tank 121.

[0057] It should be noted that a smaller cavity can be separated in the battery pack at one end corresponding to the liquid outlet 1215, and the liquid outlet 1215 is connected to the cavity, so that the electrolyte can be guided into the cavity. Alternatively, a liquid storage tank can be provided in the battery pack at a position corresponding to the liquid outlet 1215, and the liquid outlet 1215 is connected to the liquid storage tank, so that the electrolyte can be guided into the liquid storage tank.

[0058] It should also be noted that there are many ways to achieve the inclined setting of the first groove bottom 1211. For example, during production, the first groove bottom 1211 is thicker at the first end 1213 and thinner at the second end 1214. 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 slot 1212 can be 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.

[0059] For another example, the plate body constituting the first groove bottom 1211 can be tilted relative to the first notch 1212, that is, the first groove bottom 1211 as a whole can be tilted relative to the first notch 1212. In this case, both the surface of the first groove bottom 1211 facing the first notch 1212 and the surface facing away from the first notch 1212 are tilted relative to the first notch 1212, so that the electrolyte can flow along the first groove bottom 1211 to the liquid outlet 1215 at the second end 1214 under the action of its own gravity. In this case, the plate body constituting the first groove bottom 1211 can be set to have the same thickness at each position.

[0060] For another example, optionally, in one embodiment, if Figure 3 As shown, the installation groove 113 has a second groove bottom 1131 and a second groove opening 1132 opposite to each other, the liquid outlet 111 passes through the second groove bottom 1131, and the annular retaining wall 112 extends from the second groove bottom 1131 to the second groove opening 1132. Figure 2 The cover plate 12 is detachably installed in the installation groove 113, and the liquid collecting 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 second groove bottom 1131 as a whole, so that the first groove bottom 1211 can also be tilted to guide the electrolyte to the liquid outlet 1215.

[0061] Optionally, in one embodiment, as Figure 5 As shown, based on the structure of "the annular retaining wall 112 is arranged on the base frame 11 and around the liquid outlet 111, and the cover plate 12 is sleeved on the outside of the annular retaining wall 112 through the assembly hole 123", the annular retaining wall 112 has a top end 1121 and a bottom end 1122 opposite to each other along its axial direction, the top end 1121 is located in the liquid collecting tank 121, and the bottom end 1122 is connected to the base frame 11, and the circumference of the outer periphery of the annular retaining wall 112 gradually increases in the direction from the top end 1121 to the bottom end 1122; the circumference of the inner periphery of the assembly hole 123 is greater than the circumference of the outer periphery of the top end 1121, and is less than or equal to the circumference of the outer periphery of the bottom end 1122.

[0062] Specifically, in the present embodiment, because the explosion-proof valve 212 on the battery cell 211 is elliptical in shape, the liquid outlet 111, the annular baffle wall 112 and the assembly hole 123 are all adapted to be designed as an elliptical shape, wherein the annular baffle wall 112 has a top end 1121 and a bottom end 1122 along its axial direction, the top end 1121 is located in the liquid collecting tank 121, the bottom end 1122 is integrally connected to the base frame 11, and in the direction from the top end 1121 to the bottom end 1122, the circumference of the outer periphery of the annular baffle wall 112 gradually increases, that is, the outer shape of the annular baffle wall 112 is a conical structure that is small at the top and large at the bottom.

[0063] Crucially, on the basis that the cross sections of the annular retaining wall 112 and the assembly hole 123 are both elliptical, the circumference of the inner circumference of the assembly hole 123 is greater than the circumference of 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 liquid collecting tank 121. At the same time, the circumference of the inner circumference of the assembly hole 123 is less than or equal to the circumference of the outer circumference of the bottom end 1122, and thus the more the cover plate 12 is assembled downward, the tighter the annular retaining wall 112 is stuck in the assembly hole 123, which can not only improve the installation stability of the cover plate 12, but also improve the assembly tightness between the annular retaining wall 112 and the assembly hole 123, and prevent the electrolyte from leaking from the gap between the outer wall of the annular retaining wall 112 and the inner wall of the assembly hole 123.

[0064] Optionally, in one embodiment, as Figure 2 and Figure 6 As shown, the base frame 11 is provided with glue grooves 114 on both sides of the mounting groove 113, and the glue grooves 114 are used to accommodate thermally conductive glue, and the bus 20 is installed in the glue grooves 114 so that the bus 20 can be covered by the thermally conductive glue. Specifically, in this embodiment, the bus 20 needs to be installed in the glue grooves 114 first, and then the thermally conductive glue is arranged in the glue grooves 114. A cooling plate 214 can be arranged on the top of the battery pack, and the thermally conductive glue is in contact with the cooling plate 214. In this way, the heat on the battery cell 211 and the bus 20 can be conducted to the cooling plate 214 through the thermally conductive glue, thereby improving the heat dissipation efficiency of the battery cell 211.

[0065] Optionally, in one embodiment, as Figure 2 As shown, the glue containing groove 114 has a relative third groove bottom 1141 and a third notch 1142, and a plurality of bus bars 20 are installed on the third groove bottom 1141. Each bus bar 20 has a heat conducting surface 21 facing the third notch 1142, and an insulating boss 40 is provided between two adjacent bus bars 20. The insulating boss 40 can increase the creepage distance between the two adjacent bus bars 20, thereby avoiding a short circuit between the two adjacent bus bars 20.

[0066] Crucially, in the present embodiment, the top surface of the insulating boss 40 protrudes toward the third notch 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 .

[0067] Specifically, when the thermal conductive adhesive is liquid adhesive (the liquid thermal conductive adhesive will solidify later), the top surface of the insulating boss 40 can protrude toward the third slot 1142 relative to the thermal conductive plane 21, so that the insulating boss 40 can occupy more space in the adhesive groove 114, thereby reducing the amount of thermal conductive adhesive used and reducing costs.

[0068] When the thermal conductive adhesive is semi-solid, the top surface of the insulating boss 40 can be flush with the thermal conductive plane 21 of the bus 20, so that the thermal conductive adhesive can fully contact the thermal conductive plane 21 of the bus 20 while ensuring insulation, thereby ensuring the thermal conductive effect.

[0069] like Figure 6 As shown, the embodiment of the present application also provides a battery pack 200, which includes a battery cell assembly, an integrated busbar 100, a thermally conductive adhesive 213 and a cooling plate 214. Among them, the battery cell 211 assembly includes a plurality of battery cells 211211, the integrated busbar 100 is installed on the battery cell 211 assembly, and the busbar 20 is electrically connected to the battery cell 211. The thermally conductive adhesive 213 is contained in the adhesive container groove 114 and is in thermal contact with the busbar 20. The cooling plate 214 is installed on the side of the integrated busbar 100 away from the battery cell 211 assembly, and the cooling plate 214 is in thermal contact with the thermally conductive adhesive 213, so that the heat on the battery cell 211 and the busbar 20 can be transferred to the cooling plate 214 through the thermally conductive adhesive 213, and the refrigerant circulating in the cooling plate 214 takes the heat out of the battery panel, thereby achieving cooling of the battery panel.

[0070] It should be noted that an explosion-proof valve 212 is provided on the battery cell 211, and the integrated busbar 100 is installed on the battery cell assembly, and the specific structure of the integrated busbar 100 refers to the above embodiment, wherein the liquid outlet 111 on the bracket assembly 10 is arranged opposite to the explosion-proof valve 212, so that when the electrolyte is sprayed through the explosion-proof valve 212, the electrolyte can be sprayed into the liquid collecting tank 121 through the liquid outlet hole 111.

[0071] It can be understood that since the battery pack 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0072] The embodiment of the present application also provides an electric device (not shown), which includes a battery pack 200, and the battery pack 200 includes a battery cell assembly and an integrated busbar 100. The specific structure of the integrated busbar 100 refers to the above embodiment. It can be understood that since the battery pack 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0073] Among them, electrical equipment can be automobiles, ships, industrial equipment, household appliances, etc.

[0074] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. An integrated busbar, characterized in that: include: A bracket assembly is used to be installed on the battery cell and includes a base frame and a cover plate. The base frame is provided with a mounting groove and a glue holding groove which are separated from each other. A wire hole is connected between the mounting groove and the glue holding groove. The glue holding groove is used to hold thermally conductive glue. The cover plate is installed on the base frame. A bus bar is installed in the adhesive groove to be in thermal contact with the thermally conductive adhesive, and the bus bar is used to be electrically connected to the battery core; and, A collection wire harness is installed in the installation groove, and the collection wire portion passes through the wire hole and is electrically connected to the battery cell; Wherein, the cover plate also covers a part of the wire hole.

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 installation groove and covers a portion of the wire hole, and / or the cover plate is provided with a second side plate, which is at least partially located in the glue containing groove and covers a portion of the wire hole.

3. The integrated busbar according to claim 1, characterized in that: The cover plate is provided with a second side plate, the second side plate is at least partially located in the glue containing groove and covers a part of the wire through hole, and the second side plate is also pressed on the bus bar.

4. The integrated busbar according to claim 1, characterized in that: The collection harness includes a main line body and a branch line body connected to each other, the main line body extends into the installation groove, the branch line body passes through the wire hole and is electrically connected to the bus; the cover plate is also provided with a pressing plate body, the pressing plate body is located in the installation groove and pressed on the main line body.

5. The integrated busbar according to any one of claims 1 to 4, characterized in that: The bracket assembly is provided with a liquid collecting tank and a liquid outlet. The liquid collecting 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 is connected to the liquid collecting tank.

6. The integrated busbar according to claim 5, characterized in that: The support assembly is further provided with an annular retaining wall, which is arranged around the liquid outlet hole and at least partially protrudes from the bottom of the first groove.

7. The integrated busbar according to claim 6, characterized in that: The base frame is provided with a mounting groove, in which the liquid outlet and the annular retaining wall are provided; the cover plate is installed in the mounting groove and is provided with the liquid collecting groove, the first groove bottom is provided with an assembly hole, the annular retaining wall passes through the assembly hole and protrudes relative to the first groove bottom.

8. The integrated busbar according to claim 7, characterized in that: The annular retaining wall has a top end and a bottom end opposite to each other in its axial direction, the top end is located in the liquid collecting tank, and the bottom end is connected to the base frame, and the circumference of the outer periphery of the annular retaining wall gradually increases in the direction from the top end to the bottom end; the circumference of the inner periphery of the assembly hole is greater than the circumference of the outer periphery of the top end, and is less than or equal to the circumference of the outer periphery of the bottom end.

9. The integrated busbar according to claim 5, characterized in that: The first tank bottom is at least partially inclined to guide the electrolyte to a preset position.

10. The integrated busbar according to claim 9, characterized in that: The liquid collecting trough has a first notch opposite to the first trough bottom, and the liquid collecting trough 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, and the first trough bottom extends from the first end to the second end while also inclining in a direction away from the first notch.

11. The integrated busbar according to claim 7, characterized in that: The mounting groove has a second groove bottom and a second groove opening relative to each other, the liquid outlet passes through the second groove bottom, and the annular retaining 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.

12. The integrated busbar according to any one of claims 1 to 4, characterized in that: The glue containing groove has a relative third groove bottom and a third notch, and a plurality of the bus bars are installed on the third groove bottom, each of the bus bars has a heat-conducting plane facing the third notch, and an insulating boss is provided between two adjacent bus bars; the top surface of the insulating boss protrudes toward the third notch relative to the heat-conducting plane, or the top surface of the insulating boss is flush with the heat-conducting plane.

13. A battery pack, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells; The integrated busbar according to any one of claims 1 to 12 is mounted on the battery cell assembly, and the busbar is electrically connected to the battery cell; Thermally conductive adhesive, contained in the adhesive containing groove and in thermal contact with the bus bar; as well as, A cooling plate is installed on a side of the integrated busbar that is away from the battery core assembly, and the cooling plate is in thermal contact with the thermal conductive adhesive.

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

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