Integrated busbar, battery pack, and electric device

Abstract

The present application provides an integrated busbar, a battery pack, and an electric device. The integrated busbar comprises a support assembly, busbars, and a collection wire harness. The support assembly is mounted on battery cells, and comprises a bottom frame and a cover plate, the bottom frame is provided with mounting grooves and adhesive accommodating grooves which are arranged separately, wire holes are communicated between the mounting grooves and the adhesive accommodating grooves, the adhesive accommodating grooves are used for accommodating thermally conductive adhesive, and the cover plate is mounted on the bottom frame. The busbars are mounted in the adhesive accommodating grooves so as to be in thermally conductive contact with the thermally conductive adhesive, and the busbars are electrically connected to the battery cells. The collection wire harness is mounted in the mounting grooves, and part of the collection wire passes through the wire holes and is electrically connected to the battery cells. The cover plate also covers part of the wire holes.

Description

An integrated busbar, battery pack and electrical equipment

[0001] This application claims priority to Chinese Patent Application No. 202411441900.X, filed on October 15, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, specifically to an integrated busbar, battery pack, and electrical device. Background Technology

[0003] The integrated busbar in the battery pack has a heat-conducting groove for holding thermally conductive adhesive. The busbar, which connects to the battery cells, is installed within the groove, allowing the thermally conductive adhesive to make thermal contact with the busbar and dissipate heat, preventing overheating of the busbar and battery cells. Simultaneously, to facilitate the connection of the data acquisition harness to the busbar, a through-hole is provided on the side wall of the heat-conducting groove. The data acquisition harness passes through this through-hole and connects to the busbar. Invention Overview

[0004] However, due to the large size of the through hole, a significant amount of thermally conductive adhesive overflows from the adhesive reservoir when it is injected into the reservoir, resulting in a large amount of thermally conductive adhesive being used and thus higher production costs.

[0005] This application provides an integrated busbar, which includes a support assembly, a busbar, and a data acquisition harness. The support assembly is used to mount on a battery cell and 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-through hole. The adhesive-containing groove is used to contain thermally conductive adhesive. The cover plate is mounted on the base frame. The busbar is mounted in the adhesive-containing groove to make thermally conductive contact with the thermally conductive adhesive and is used to electrically connect to the battery cell. The data acquisition harness is mounted in the mounting groove, and the data acquisition wires pass through the wire-through hole and are electrically connected to the battery cell. The cover plate also covers a portion of the wire-through hole.

[0006] This application also provides a battery pack, including a cell assembly, thermally conductive adhesive, a cooling plate, and the aforementioned integrated busbar; the cell assembly includes a plurality of cells; the integrated busbar is mounted on the cell assembly and the busbar is electrically connected to the cells; the thermally conductive adhesive is contained in an adhesive groove and is in thermally conductive contact with the busbar; the cooling plate is mounted on the side of the integrated busbar opposite to the cell assembly and is in thermally conductive contact with the thermally conductive adhesive.

[0007] This application also provides an electrical device including the aforementioned battery pack. Beneficial effects

[0008] This application reduces the opening area of ​​the wire passage hole by making the bracket assembly include a base frame and a cover plate. The cover plate is installed on the base frame and covers part of the wire passage hole. This reduces the amount of thermal conductive adhesive overflowing from the wire passage hole into the adhesive reservoir, thus avoiding excessive use of thermal conductive adhesive and reducing production costs, while ensuring that the acquisition wire harness can be electrically connected to the busbar through the wire passage hole. Attached Figure Description

[0009] Figure 1 is a structural schematic diagram of some implementation methods of the integrated busbar in this application;

[0010] Figure 2 is a partial structural schematic diagram of the integrated busbar in Figure 1;

[0011] Figure 3 is a structural schematic diagram of the base frame, busbar and data acquisition harness in Figure 2;

[0012] Figure 4 is a schematic diagram of the cover plate in Figure 2;

[0013] Figure 5 is a structural cross-sectional view of some implementation methods of the integrated busbar in this application;

[0014] Figure 6 is a structural cross-sectional view of some implementations of the battery pack in this application.

[0015] Explanation of reference numerals in the attached figures:

[0016] 100. Integrated busbar; 10. Support assembly; 11. Base frame; 111. Liquid outlet; 112. Annular baffle; 1121. Top end; 1122. Bottom end; 113. Mounting groove; 1131. Second groove bottom; 1132. Second groove opening; 1133. Cable guide hole; 114. Adhesive container; 1141. Third groove bottom; 1142. Third groove opening; 12. Cover plate; 121. Liquid collection groove; 1211. First groove bottom; 1212. 1213 First slot; 1214 Second end; 1215 Liquid outlet; 122 Second side plate; 123 Assembly hole; 124 First side plate; 125 Press plate; 20 Busbar; 21 Thermally conductive plane; 30 Acquisition harness; 31 Main line; 32 Branch line; 40 Insulating boss; 200 Battery pack; 211 Battery cell; 212 Explosion-proof valve; 213 Thermally conductive adhesive; 214 Cooling plate. Embodiments of the present invention

[0017] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0018] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, where the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, where the first feature is at a lower horizontal level than the second feature.

[0019] In the description of this embodiment, the terms "upper," "lower," "left," "right," "front," and "rear," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for distinction in description and have no special meaning.

[0020] To address the technical problem of excessive thermal conductive adhesive overflowing from the via hole into the adhesive reservoir, in a first aspect, as shown in Figures 1 and 2, an embodiment of this application provides an integrated busbar 100, which includes a support assembly 10, a busbar 20, and a data acquisition harness 30.

[0021] The bracket assembly 10 is used for mounting on the battery cell 211, and includes a base frame 11 and a cover plate 12, as shown in Figure 3. The base frame 11 has a separately arranged mounting groove 113 and an adhesive-containing groove 114, which are connected by a wire-through hole 1133. The adhesive-containing groove 114 is used to accommodate the thermally conductive adhesive 213. A busbar 20 is installed in the adhesive-containing groove 114 to make thermally conductive contact with the thermally conductive adhesive 213, and the busbar 20 is used for electrical connection with the battery cell 211. A data acquisition harness 30 is installed in the mounting groove 113, and the data acquisition wire portion passes through the wire-through hole 1133 and is electrically connected to the busbar 20.

[0022] Specifically, in the structural scheme shown in Figure 3, the base frame 11 is made of insulating material. The base frame 11 has a mounting groove 113 and two adhesive receiving grooves 114. The two adhesive receiving grooves 114 are located on both sides of the width direction of the mounting groove 113, and the mounting groove 113 and any one of the adhesive receiving grooves 114 are separated by a partition plate.

[0023] Each adhesive tank 114 contains multiple busbars 20. To facilitate electrical connection between the busbars 20 and the battery cells 211 below the base frame 11, the bottom of the adhesive tank 114 may have through holes. The busbars 20 are electrically connected to the battery cells 211 at the through holes. It should be noted that the busbars 20 can be made of aluminum, copper, or other conductive materials. The busbars 20 are used to connect multiple battery cells 211 in series or parallel, and the specific connection method can be flexibly selected as needed.

[0024] The data acquisition harness 30 is used to acquire information such as voltage, current, and temperature of the battery cell 211 and transmit the acquired information to the battery management system so as to better control the operation of the battery cell 211 based on the information such as voltage, current, and temperature of the battery cell 211.

[0025] As shown in Figure 3, the data acquisition harness 30 is installed in the mounting slot 113. The adhesive groove 114 and the mounting slot 113 are connected by a wire through hole 1133. Part of the data acquisition harness 30 passes through the wire through hole 1133 and is electrically connected to the battery cell 211. In this way, the data acquisition harness 30 does not need to extend upwards out of the mounting slot 113 and then into the adhesive groove 114, making the connection between the data acquisition harness 30 and the busbar 20 more convenient.

[0026] Specifically, the data acquisition harness 30 includes a main cable 31 and branch cables 32 connected to each other. The main cable 31 extends into the mounting groove 113, and the branch cables 32 pass through cable holes 1133 and are electrically connected to the busbar 20. The cable holes 1133 are adapted to the number and position of the branch cables 32. For example, when there are multiple branch cables 32, there are also multiple cable holes 1133, with each cable hole 1133 corresponding to a different branch cable 32. It should be noted that the main cable 31 and branch cables 32 can be cylindrical or sheet-like (for example, the main cable 31 and branch cables 32 can be formed from flexible circuit boards).

[0027] It should be noted that after the data acquisition harness 30 passes through the through-hole 1133, it can be directly connected to the terminal of the battery cell 211, thereby achieving an electrical connection with the battery cell 211. Alternatively, since the busbar 20 is electrically connected to the battery cell 211, the data acquisition harness 30 can also be connected to the busbar 20, and then the voltage, current, temperature, and other information of the battery cell 211 can be acquired through the busbar 20.

[0028] As can be understood by referring to Figures 3 and 6, the adhesive container 114 is also used to contain the thermally conductive adhesive 213. In actual production, the thermally conductive adhesive 213 can be injected into the adhesive container 114 and cover the busbar 20. This allows for thermally conductive contact between the busbar 20 and the thermally conductive adhesive 213, thereby allowing the thermally conductive adhesive 213 to conduct away the heat from the busbar 20, for example, to the cooling plate 214 in contact with it, thus preventing the busbar 20 and the battery cell 211 from overheating.

[0029] Crucially, in this embodiment, as understood in conjunction with Figures 2 and 5, when the cover plate 12 is installed on the frame, the cover plate 12 also covers a portion of the wire hole 1133. Specifically, the cover plate 12 at least partially blocks the opening of the wire hole 1133, or the cover plate 12 at least partially fills the wire hole 1133. This reduces the opening area of ​​the wire hole 1133, thereby reducing the amount of thermally conductive adhesive 213 overflowing from the wire hole 1133 into the adhesive reservoir 114, avoiding excessive use of thermally conductive adhesive 213, and reducing production costs.

[0030] It should be noted that the specific structure of the cover plate 12 can be flexibly selected according to the needs, as long as it can cover part of the wire hole 1133.

[0031] For example, optionally, in one embodiment, as shown in FIG5, the cover plate 12 is provided with a first side plate 124. The first side plate 124 is at least partially located within the mounting groove 113 and covers a portion of the wire hole 1133. That is, in this embodiment, the cover plate 12 blocks the side opening of the wire hole 1133 near the mounting groove 113, thereby reducing the amount of thermally conductive adhesive 213 flowing out of the wire hole 1133. It should be noted that, in order to improve the blocking effect of the first side plate 124 on the wire hole 1133, the first side plate 124 can fit against the side wall of the mounting groove 113, which can reduce the gap between the first side plate 124 and the wire hole 1133, further reducing the amount of thermally conductive adhesive 213 overflowing.

[0032] For example, in another embodiment, as shown in FIG5, the cover plate 12 is provided with a second side plate 122. The second side plate 122 is at least partially located within the adhesive reservoir 114 and covers a portion of the wire hole 1133. That is, in this embodiment, the cover plate 12 blocks the side opening of the wire hole 1133 near the adhesive reservoir 114, thereby reducing the amount of thermally conductive adhesive 213 flowing out of the wire hole 1133. It should be noted that, in order to improve the blocking effect of the second side plate 122 on the wire hole 1133, the second side plate 122 can be fitted against the side wall of the adhesive reservoir 114. This can reduce the gap between the second side plate 122 and the wire hole 1133, further reducing the amount of thermally conductive adhesive 213 overflowing.

[0033] For example, in another embodiment, as shown in FIG5, the cover plate 12 is provided with a first side plate 124 and a second side plate 122, which are spaced apart and connected by a connecting plate 126. The first side plate 124 is at least partially located within the mounting groove 113 and covers a portion of the wire hole 1133, while the second side plate 122 is at least partially located within the adhesive receiving groove 114 and covers a portion of the wire hole 1133. In other words, in this embodiment, the cover plate 12 blocks both the side opening of the wire hole 1133 closest to the mounting groove 113 and the side opening of the wire hole 1133 closest to the adhesive receiving groove 114. This provides a better adhesive blocking effect, thereby reducing the amount of thermally conductive adhesive 213 overflowing and lowering production costs.

[0034] Optionally, in one embodiment, as understood with reference to Figures 2 and 5, the cover plate 12 is provided with a second side plate 122. The second side plate 122 is at least partially located within the adhesive groove 114 and covers a portion of the wire hole 1133. The second side plate 122 is also pressed onto the busbar 20. That is, in this embodiment, the second side plate 122 both blocks the wire hole 1133 to reduce the overflow of the thermally conductive adhesive 213 and limits the busbar 20. In this way, no additional structure for limiting the busbar 20 is needed on the base frame 11, making the structure of the base frame 11 simpler.

[0035] Optionally, in one embodiment, as shown in FIG5, the acquisition harness 30 includes a main body 31 and a branch body 32 connected to each other. The main body 31 extends into the mounting groove 113, and the branch body 32 passes through the wire hole 1133 and is electrically connected to the busbar 20. The cover plate 12 is also provided with a pressing plate 125, which is located in the mounting groove 113 and pressed onto the main body 31. That is, in this embodiment, when the 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 thermal conductive adhesive 213, but also limits the acquisition wire harness 30. This eliminates the need for other limiting structures on the base frame 11 to limit the acquisition wire harness 30, simplifying the structure of the base frame 11. It also allows some of the acquisition wire harness 30 to be hidden at the bottom of the cover plate 12. In addition, limiting the acquisition wire harness 30 by the cover plate 12 makes the limiting process of the acquisition wire harness 30 simpler and more convenient, thereby improving assembly efficiency.

[0036] To address the technical problem that electrolyte ejected from the explosion-proof valve can easily cause insulation failure in other components or short circuits between two conductive components, as shown in Figure 1, the support assembly 10 is further provided with a liquid collection tank 121 and a liquid outlet 111. The liquid collection tank 121 has a first tank bottom 1211, and one end of the liquid outlet 111 is used for the explosion-proof valve 212 corresponding to the battery cell 211 (see Figure 6). The other end passes through the first tank bottom 1211 and communicates with the liquid collection tank 121.

[0037] Specifically, in this embodiment, the bracket assembly 10 is mainly used to support and position components such as the busbar 20 and the data acquisition harness 30, and then form a whole with the busbar 20, the data acquisition harness 30 and other components, and then install them together on the battery cell assembly, which can improve assembly efficiency.

[0038] In one embodiment, as shown in Figure 2, which is a partial structural schematic diagram of the integrated busbar in Figure 1, the support assembly 10 includes a base frame 11 and a cover plate 12. Both the base frame 11 and the cover plate 12 are made of insulating material. The base frame 11 is used to install components such as the busbar 20 and the data acquisition harness 30, and then it is installed on the cell assembly along with the busbar 20 and the data acquisition 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 realize series or parallel connection between the multiple cells 211.

[0039] Referring to Figures 5 and 6, the battery cell assembly includes multiple battery cells 211, each equipped with an explosion-proof valve 212. The base frame 11 has a liquid outlet 111 at the position corresponding to the explosion-proof valve 212. A cover plate 12 is detachably mounted on the base frame 11. As shown in Figure 4, the cover plate 12 has a liquid collection tank 121 with a first tank bottom 1211. An assembly hole 123 passes through the first tank bottom 1211, corresponding to the liquid outlet 111. Therefore, when the electrolyte in the battery cell 211 is ejected through the explosion-proof valve 212, the electrolyte will be sprayed into the liquid collection tank 121 through the liquid outlet 111, thus retaining the ejected electrolyte in the liquid collection tank 121.

[0040] As can be seen, in the above embodiments, the support assembly 10 includes two components: a base frame 11 and a cover plate 12. The liquid outlet 111 and the liquid collection tank 121 are respectively disposed on the base frame 11 and the cover plate 12.

[0041] Of course, the liquid outlet 111 and the liquid collection tank 121 can also be set on the same component. For example, in some other embodiments, Figure 3 can be used as a reference. The liquid collection tank 121 and the liquid outlet 111 are directly formed on the base frame 11. The liquid outlet 111 is located at the bottom of the liquid collection tank 121 and penetrates the bottom of the liquid collection tank 121.

[0042] Alternatively, in some other embodiments, the support assembly 10 still includes a base frame 11 and a cover plate 12. The cover plate 12 is also detachably mounted on the base frame 11. The difference is that the base frame 11 is hollowed out at the position corresponding to the cover plate 12. The liquid outlet 111 and the liquid collection tank 121 are both provided on the cover plate 12. The liquid outlet 111 passes through the bottom of the liquid collection tank 121 and is provided corresponding to the explosion-proof valve 212 of the battery cell 211.

[0043] In summary, there are multiple ways to set up the liquid outlet 1215 and the liquid collection tank 121 in this application, and the appropriate method can be selected flexibly according to the needs in actual implementation.

[0044] It should be noted that the battery cell assembly includes multiple battery cells 211, and each battery cell 211 is equipped with an explosion-proof valve 212. Therefore, the bracket assembly 10 is equipped with multiple liquid outlet holes 111. The multiple liquid outlet holes 111 are used to correspond one-to-one with the multiple explosion-proof valves 212, and one end of each of the multiple liquid outlet holes 111 passes through the bottom of the liquid collection tank 121 and is connected to the liquid collection tank 121, so as 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 collection tank 121.

[0045] In summary, in the embodiments of this application, by providing a liquid collection tank 121 and a liquid outlet 111 on the support assembly 10 of the integrated busbar 100, the liquid collection tank 121 has a first tank bottom 1211, one end of the liquid outlet 111 is used for the explosion-proof valve 212 of the battery cell 211, and the other end passes through the first tank bottom 1211 of the liquid collection tank 121 and communicates with the liquid collection tank 121. Thus, when the explosion-proof valve 212 of the battery cell 211 is opened and the electrolyte is sprayed out through the explosion-proof valve 212, the electrolyte will be sprayed out into the liquid collection tank 121 through the liquid outlet 111, that is, the electrolyte is received in the liquid collection tank 121. This can prevent the electrolyte from splashing onto other components in the battery pack, thereby avoiding the technical problem of the sprayed electrolyte causing the insulation performance of other components to fail or causing a short circuit between two conductive components.

[0046] Optionally, in one embodiment, as shown in FIG2, the support assembly 10 is further provided with an annular baffle 112, which surrounds the liquid outlet hole 111 and at least partially protrudes from the first groove bottom 1211. Specifically, in the structural scheme shown in FIG3, the base frame 11 is provided with a mounting groove 113, which has a second groove bottom 1131 and a second groove opening 1132. The liquid outlet hole 111 is penetrated through the second groove bottom 1131. One end of the annular baffle 112 is integrally connected to the base frame 11 and surrounds the liquid outlet hole 111, while the other end extends toward the second groove opening 1132.

[0047] Referring to Figures 2 and 4, the cover plate 12 is installed in the mounting groove 113, and the cover plate 12 is provided with a liquid collection groove 121. The first bottom 1211 of the liquid collection groove 121 has a through mounting hole 123. When the cover plate 12 is assembled onto the base frame 11, the mounting hole 123 is fitted over the annular baffle 112. The annular baffle 112 passes through the mounting hole 123 and protrudes relative to the first bottom 1211.

[0048] It is understood that in this embodiment, by setting an annular baffle 112, which surrounds the periphery of the liquid outlet 111 and protrudes relative to the first bottom 1211 of the liquid collection tank 121, the electrolyte falling into the liquid collection tank 121 can be prevented from flowing back into the battery cell 211, or the electrolyte falling into the liquid collection tank 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 on the top surface of the battery cell 211.

[0049] As can be seen, in the above embodiments, the annular baffle 112 is integrally formed with the base frame 11. This "annular baffle 112 integrally formed with the frame" solution can also be applied to the solution where "the base frame 11 directly forms the liquid collection tank 121 and the liquid outlet 111".

[0050] Of course, in some other embodiments, Figure 4 can be used as a reference. The annular baffle 112 can also be provided on the cover plate 12. Specifically, the cover plate 12 is provided with a liquid collection tank 121. A mounting hole 123 is provided through the first bottom 1211 of the liquid collection tank 121. The mounting hole 123 is arranged opposite to the liquid outlet 111. One end of the annular baffle 112 is connected to the bottom of the liquid collection tank 121 and surrounds the mounting hole 123. The other end extends toward the first opening 1212 of the liquid collection tank 121. In this way, the annular baffle 112 also protrudes relative to the bottom of the liquid collection tank 121, thereby preventing the electrolyte falling into the liquid collection tank 121 from flowing out of the liquid collection tank 121 through the liquid outlet 111.

[0051] Optionally, in one embodiment, referring to Figure 2, the bottom of the first tank 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 from the explosion-proof valve 212, or when a large amount of electrolyte accumulates in the collection tank 121 over time, the electrolyte may overflow from the collection tank 121 and flow to other locations in the battery pack, or the electrolyte may cross the annular baffle 112 and flow through the outlet hole 111 onto the battery cell 211.

[0052] Therefore, in this embodiment, by setting the bottom 1211 of the first tank of the liquid collection tank 121 at least partially inclined, the electrolyte can be guided to a preset position. This "preset position" can be a deeper position in the liquid collection tank 121 (such as a pit specially set in the liquid collection tank 121), or a position in the battery pack where the electrolyte can be stored (such as a cavity specially set in the battery pack for storing the electrolyte). This can prevent the electrolyte from overflowing from the liquid collection tank 121, or flowing over the annular baffle 112 and through the outlet hole 111 onto the cell 211.

[0053] Optionally, in one embodiment, as shown in FIG2, the liquid collecting tank 121 has a first opening 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. The second end 1214 is provided with an outlet 1215. The first tank bottom 1211 extends from the first end 1213 to the second end 1214 and is also inclined away from the first opening 1212. That is, in this embodiment, the first tank bottom 1211 of the liquid collecting tank 121 is inclined as a whole along its length direction. When the electrolyte falls into the liquid collecting tank 121, the electrolyte will flow to the second end 1214 under its own gravity and flow out from the outlet 1215. In this way, the electrolyte can be discharged from the liquid collecting tank 121 in a timely manner, avoiding the accumulation of electrolyte in the liquid collecting tank 121.

[0054] It should be noted that a smaller cavity can be partitioned at one end of the corresponding outlet 1215 within the battery pack, with the outlet 1215 connected to this cavity, allowing the electrolyte to be guided into the cavity. Alternatively, a storage tank can be installed at the location corresponding to the outlet 1215 within the battery pack, with the outlet 1215 connected to the storage tank, allowing the electrolyte to be guided into the storage tank.

[0055] It should also be noted that there are several ways to achieve the inclined setting of the first tank bottom 1211. For example, during production, the thickness of the first tank bottom 1211 at the first end 1213 is thicker and the thickness at the second end 1214 is thinner. The thickness of the first tank bottom 1211 gradually decreases from the first end 1213 to the second end 1214. This makes the surface of the first tank bottom 1211 facing the first tank opening 1212 an inclined surface, so that the electrolyte can flow to the outlet 1215 at the second end 1214 under its own gravity.

[0056] 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.

[0057] For example, optionally, in one embodiment, as shown in FIG3, the mounting groove 113 has a second groove bottom 1131 and a second groove opening 1132, with the liquid outlet 111 penetrating through the second groove bottom 1131, and the annular baffle 112 extending from the second groove bottom 1131 to the second groove opening 1132. Referring again to FIG2, the cover plate 12 is detachably installed in the mounting groove 113, and the liquid collection groove 121 is disposed on the cover plate 12. When the cover plate 12 is installed on the base frame 11, the cover plate 12 is inclined relative to the second groove bottom 1131. This also allows the first groove bottom 1211 to be inclined so as to guide the electrolyte to the liquid outlet 1215.

[0058] Optionally, in one embodiment, as shown in FIG5, based on the structure of "annular baffle 112 is set on the base frame 11 and surrounds the liquid outlet 111, and cover plate 12 is sleeved on the annular baffle 112 through assembly hole 123", the annular baffle 112 has a top end 1121 and a bottom end 1122 opposite to each other in its axial direction. The top end 1121 is located in the liquid collection tank 121, and the bottom end 1122 is 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; the circumference of the inner perimeter of the assembly hole 123 is greater than the circumference of the outer perimeter of the top end 1121, and less than or equal to the circumference of the outer perimeter of the bottom end 1122.

[0059] 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.

[0060] Crucially, given that both the annular baffle 112 and the assembly hole 123 have elliptical cross-sections, the inner circumference of the assembly hole 123 is greater than the outer circumference of the top end 1121. This allows the top end 1121 of the annular baffle 112 to pass through the assembly hole 123 and be located within the liquid collection tank 121. Simultaneously, the inner circumference of the assembly hole 123 is less than or equal to the outer circumference of the bottom end 1122. Consequently, the further down the cover plate 12 is assembled, the tighter the annular baffle 112 is secured within the assembly hole 123. This not only improves the installation stability of the cover plate 12 but also enhances the tightness of the assembly between the annular baffle 112 and the assembly hole 123, preventing electrolyte leakage from the gap between the outer wall of the annular baffle 112 and the inner wall of the assembly hole 123.

[0061] Optionally, in one embodiment, as shown in Figures 2 and 6, the base frame 11 is provided with adhesive-containing grooves 114 on both sides of the mounting groove 113. The adhesive-containing grooves 114 are used to contain thermally conductive adhesive, and the busbar 20 is installed in the adhesive-containing grooves 114 so that the busbar 20 can be covered by the thermally conductive adhesive. Specifically, in this embodiment, the busbar 20 needs to be installed into the adhesive-containing groove 114 first, and then the thermally conductive adhesive is placed in the adhesive-containing groove 114. A cooling plate 214 can be set on the top of the battery pack, and the thermally conductive adhesive contacts the cooling plate 214. In this way, the heat on the battery cell 211 and the busbar 20 can be conducted to the cooling plate 214 through the thermally conductive adhesive, thereby improving the heat dissipation efficiency of the battery cell 211.

[0062] Optionally, in one embodiment, as shown in FIG2, the adhesive tank 114 has a third tank bottom 1141 and a third tank opening 1142 opposite to each other. A plurality of busbars 20 are installed on the third tank bottom 1141. Each busbar 20 has a heat-conducting plane 21 facing the third tank opening 1142, and an insulating boss 40 is provided between two adjacent busbars 20. The insulating boss 40 can increase the creepage distance between two adjacent busbars 20, thereby avoiding short circuits between two adjacent busbars 20.

[0063] Crucially, in this embodiment, the top surface of the insulating boss 40 protrudes towards the third slot 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.

[0064] Specifically, when the thermally conductive adhesive is a liquid adhesive (which will solidify later), the top surface of the insulating boss 40 can protrude relative to the thermally conductive plane 21 toward the third slot 1142, so that the insulating boss 40 can occupy more space in the adhesive container 114, thereby reducing the amount of thermally conductive adhesive used and thus reducing costs.

[0065] When the thermally conductive adhesive is semi-solid, the top surface of the insulating boss 40 can be flush with the thermally conductive plane 21 of the busbar 20. This ensures that the thermally conductive adhesive can fully contact the thermally conductive plane 21 of the busbar 20 while maintaining insulation, thus ensuring the thermal conductivity effect.

[0066] As shown in Figure 6, this embodiment of the application also provides a battery pack 200, which includes a cell assembly, an integrated busbar 100, thermally conductive adhesive 213, and a cooling plate 214. The cell assembly includes multiple cells 211, the integrated busbar 100 is mounted on the cell assembly, and the busbar 20 is electrically connected to the cells 211. The thermally conductive adhesive 213 is contained in an adhesive reservoir 114 and makes thermally conductive contact with the busbar 20. The cooling plate 214 is mounted on the side of the integrated busbar 100 opposite to the cell assembly, and makes thermally conductive contact with the thermally conductive adhesive 213. In this way, heat from the cells 211 and the busbar 20 can be transferred to the cooling plate 214 through the thermally conductive adhesive 213, and the heat is carried away from the battery panel by the refrigerant flowing within the cooling plate 214, thus cooling the battery panel.

[0067] It should be noted that the battery cell 211 is equipped with an explosion-proof valve 212, and the integrated busbar 100 is installed on the battery cell assembly. The specific structure of the integrated busbar 100 is as described in the above embodiment. The liquid outlet hole 111 on the bracket 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 collection tank 121 through the liquid outlet hole 111.

[0068] It is 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 about by the technical solutions of the above embodiments, which will not be repeated here.

[0069] This application also provides an electrical device (not shown), which includes a battery pack 200. The battery pack 200 includes a cell assembly and an integrated busbar 100. The specific structure of the integrated busbar 100 is as described in the above embodiments. It is understood that since this battery pack 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0070] Among them, electrical equipment can be automobiles, ships, industrial equipment, household appliances, etc.

[0071] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An integrated busbar (100), comprising: A bracket assembly (10) is used for mounting on a battery cell (211) and includes a base frame (11) and a cover plate (12). The base frame (11) is provided with a mounting groove (113) and an adhesive-containing groove (114) separated from each other. A wire hole (1133) is connected between the mounting groove (113) and the adhesive-containing groove (114). The adhesive-containing groove (114) is used to contain thermally conductive adhesive (213). The cover plate (12) is mounted on the base frame (11). A busbar (20) is installed in the adhesive reservoir (114) for thermally conductive contact with the thermally conductive adhesive (213), and the busbar (20) is used for electrical connection with the battery cell (211); and, The acquisition harness (30) is installed in the mounting slot (113), and the acquisition wire portion passes through the wire hole (1133) and is electrically connected to the battery cell (211); The cover plate (12) also covers a portion of the wire hole (1133).

2. The integrated busbar (100) according to claim 1, wherein The cover plate (12) is provided with a first side plate (124), which is at least partially located in the mounting groove (113) and covers a portion of the wire hole (1133).

3. The integrated busbar (100) according to claim 1 or 2, wherein The cover plate (12) is provided with a second side plate (122), which is at least partially located in the adhesive groove (114) and covers a portion of the wire hole (1133).

4. The integrated busbar (100) according to any one of claims 1 to 3, wherein The cover plate (12) is provided with a second side plate (122), which is at least partially located in the adhesive groove (114) and covers a portion of the wire hole (1133), and the second side plate (122) is also pressed onto the busbar (20).

5. The integrated busbar (100) according to any one of claims 1 to 4, wherein The acquisition harness (30) includes a main body (31) and a branch body (32) connected to each other. The main body (31) extends into the mounting groove (113), and the branch body (32) passes through the wire hole (1133) and is electrically connected to the busbar (20). The cover plate (12) is also provided with a pressing plate (125), which is located in the mounting groove (113) and pressed onto the main body (31).

6. The integrated busbar (100) according to any one of claims 1 to 5, wherein The support assembly (10) is provided with a liquid collection tank (121) and a liquid outlet (111). The liquid collection tank (121) has a first tank bottom (1211). One end of the liquid outlet (111) is used to provide an explosion-proof valve (212) corresponding to the battery cell (211), and the other end passes through the first tank bottom (1211) and is connected to the liquid collection tank (121).

7. The integrated busbar (100) according to claim 6, wherein The support assembly (10) is also provided with an annular baffle (112), which surrounds the liquid outlet (111) and the annular baffle (112) protrudes at least partially from the bottom of the first tank (1211).

8. The integrated busbar (100) according to claim 7, wherein The base frame (11) is provided with an installation groove (113), and the installation groove (113) is provided with the liquid outlet (111) and the annular baffle (112); the cover plate (12) is installed in the installation groove (113) and is provided with the liquid collection groove (121), the bottom of the first groove (1211) is provided with an assembly hole (123), and the annular baffle (112) passes through the assembly hole (123) and protrudes relative to the bottom of the first groove (1211).

9. The integrated busbar (100) according to claim 8, wherein The annular baffle (112) has a top end (1121) and a bottom end (1122) opposite each other along its axial direction. The top end (1121) is located inside the liquid collection tank (121), and the bottom end (1122) is 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. The circumference of the inner perimeter of the assembly hole (123) is greater than the circumference of the outer perimeter of the top end (1121) and less than or equal to the circumference of the outer perimeter of the bottom end (1122).

10. The integrated busbar (100) according to any one of claims 6 to 9, wherein The bottom of the first tank (1211) is at least partially inclined to guide the electrolyte to a preset position.

11. The integrated busbar (100) according to any one of claims 6 to 10, wherein The liquid collection tank (121) has a first opening (1212) opposite to the first tank bottom (1211), and the liquid collection tank (121) has a first end (1213) and a second end (1214) opposite to each other along its length direction. The second end (1214) is provided with a liquid outlet (1215). The first tank bottom (1211) extends from the first end (1213) to the second end (1214) and also tilts away from the first opening (1212).

12. The integrated busbar (100) according to any one of claims 8 to 11, wherein The mounting groove (113) has a second groove bottom (1131) and a second groove opening (1132) opposite to each other. The liquid outlet hole (111) passes through the second groove bottom (1131). The annular baffle (112) extends from the second groove bottom (1131) to the second groove opening (1132). The first groove bottom (1211) or the cover plate (12) is inclined relative to the second groove bottom (1131) to guide the electrolyte to a preset position.

13. The integrated busbar (100) according to any one of claims 1 to 12, wherein The adhesive reservoir (114) has a third bottom (1141) and a third opening (1142) facing each other. A plurality of busbars (20) are installed on the third bottom (1141). Each busbar (20) has a heat-conducting plane (21) facing the third opening (1142), and an insulating boss (40) is provided between two adjacent busbars (20).

14. The integrated busbar (100) according to claim 13, wherein The top surface of the insulating boss (40) protrudes toward the third slot (1142) relative to the heat-conducting plane (21).

15. The integrated busbar (100) of claim 13, wherein, The top surface of the insulating boss (40) is flush with the heat-conducting plane (21).

16. A battery pack, comprising: A battery cell assembly, comprising multiple battery cells (211); The integrated busbar (100) as described in any one of claims 1-15 is mounted on the battery cell assembly, and the busbar (20) is electrically connected to the battery cell (211); Thermally conductive adhesive (213) is contained within the adhesive reservoir (114) and in thermally conductive contact with the busbar (20); and, A cooling plate (214) is installed on the side of the integrated busbar (100) away from the cell assembly, and the cooling plate (214) is in thermal contact with the thermally conductive adhesive (213).

17. An electrical appliance comprising a battery pack (200) as claimed in claim 16.

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