Battery acquisition assembly, battery, and electric vehicle

Abstract

The present application provides a battery acquisition assembly, a battery, and an electric vehicle. The battery acquisition assembly comprises a support; a busbar, arranged on the support, wherein the busbar is configured to be connected to a battery cell; and an acquisition circuit, arranged on the support and electrically connected to the busbar, wherein the acquisition circuit is provided with a bending part, and the support is provided with an opening corresponding to the bending part.

Description

Battery collection components, batteries and electric vehicles

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 29, 2023, with application number 202321685915.1, and the Chinese patent application filed with the China Patent Office on June 30, 2023, with application number 202321712437.9, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of battery technology, and in particular to a battery collection component, a battery, and an electric vehicle. Background Art

[0003] The Cells Contact System (CCS) is installed on the battery module to collect voltage, current, and temperature signals from the battery module. The CCS typically uses flexible flat cables (FFCs) for its collection circuitry. FFCs need to be bent before connecting to the busbar. However, the FFC's bends pose a high risk of breakage when squeezed by external forces, shortening the battery life. SUMMARY OF THE INVENTION

[0004] The present application provides a battery collection component, a battery, and an electric vehicle, which can reduce the risk of breakage of a bent portion of a collection line and increase the life of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery collection component, comprising:

[0006] Bracket;

[0007] a busbar, disposed on the bracket, the busbar being configured to connect the battery cells;

[0008] A collection circuit is provided on the bracket and is electrically connected to the busbar;

[0009] Wherein, the collection line has a bending portion, and the bracket is provided with an opening corresponding to the bending portion.

[0010] In a second aspect, an embodiment of the present application further provides a battery, comprising the battery collection component as described above.

[0011] In a third aspect, an embodiment of the present application further provides an electric vehicle comprising the battery as described above. Beneficial effects

[0012] Embodiments of the present application provide a battery collection assembly, a battery, and an electric vehicle. An opening is provided on the bracket at a position corresponding to the bent portion of the collection line. When the bent portion is squeezed by an external force, the opening provides an escape space for the bent portion, thereby reducing the risk of the bent portion of the collection line being broken due to the external force, thereby increasing the service life of the collection line and thereby increasing the life of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0014] FIG1 is a schematic structural diagram of a battery collection component provided in an embodiment of the present application;

[0015] FIG2 is an enlarged schematic diagram of a portion A of the battery collection assembly in FIG1 ;

[0016] FIG3 is an enlarged schematic diagram of a portion B of the battery collection assembly in FIG1 ;

[0017] Figure 4 is a partial enlarged schematic diagram of the battery collection component C in Figure 1;

[0018] FIG5 is an enlarged schematic diagram of a portion D of the battery collection assembly in FIG1 ;

[0019] FIG6 is a schematic structural diagram of a second battery collection assembly provided in an embodiment of the present application;

[0020] FIG7 is an exploded schematic diagram of the battery collection assembly in FIG6 ;

[0021] FIG8 is a partially enlarged schematic diagram of the battery collection assembly in FIG6 ;

[0022] FIG9 is an exploded view of a partially enlarged structure of the battery collection assembly in FIG8 .

[0023] Reference numerals: 100 - bracket; 110 - opening; 200 - busbar; 201 - cell connection portion; 202 - line connection portion; 203 - line connection area; 204 - non-line connection area; 205 - protective adhesive; 206 - connection piece; 210 - output stage busbar; 211 - first cell connection portion; 212 - first line connection portion; 213 - fixing point; 214 - buckle; 2111 - buckle connection area; 2112 - non-buckle connection area; 220 - series busbar; 221 - second cell connection portion; 222 - second line connection portion; 300 - collection circuit; 310 - bending portion; 301, main body; 302, first branch portion; 303, second branch portion;

[0024] 400 - circuit board; 410 - connector; 420, second positioning hole;

[0025] 1. Battery collection assembly; 10. Blister bracket; 11. First mounting slot; 12. Second mounting slot; 13. Third thermal rivet stud; 101. First positioning hole; 102. First through hole; 103. Second through hole; 20. Plastic bracket; 21. Fixing portion; 22. Extension portion; 2101. First thermal rivet stud; 2201. Second thermal rivet stud; 30. Temperature sensor; 41. First output terminal; 42. Second output terminal; 50. Protective cover. Modes for Carrying Out the Invention

[0026] Currently, the collection circuits of battery collection components typically use flexible flat cables (FFCs). FFCs need to be bent to connect to the busbar. However, the upper and lower surfaces of the FFC bend are squeezed by the battery cover and bracket, respectively, resulting in a high risk of breakage at the bend, which affects the battery life.

[0027] To solve the above problems, the present application proposes a battery collection component, a battery and an electric vehicle.

[0028] The battery collection component provided by this application will be described in detail below with reference to specific embodiments and accompanying drawings.

[0029] As shown in FIG1-FIG2, the embodiment of the present application proposes a battery collection component 1, comprising:

[0030] Bracket 100;

[0031] The busbar 200 is provided on the bracket 100 and is configured to connect the battery cells;

[0032] The collection circuit 300 is provided on the bracket 100 and is electrically connected to the bus bar 200;

[0033] The acquisition circuit 300 has a bending portion 310 , and the bracket 100 is provided with an opening 110 corresponding to the bending portion 310 . The orthographic projection of the bending portion 310 on the bracket 100 is located within the range of the opening 110 .

[0034] The battery collection component 1 is connected to the battery cell and can be used to collect information such as pressure and temperature of the battery cell to monitor the working status of the battery cell in the battery.

[0035] The bracket 100 may be configured to have a planar structure for supporting the busbar 200 and the collection circuit 300 , and the busbar 200 and the collection circuit 300 are integrated on the bracket 100 to facilitate assembly of the battery.

[0036] The busbar 200 is used to connect to the battery cells, forming a series or parallel structure for multiple battery cells in the battery, so as to collect information from multiple battery cells and monitor their operating status. The battery collection assembly 1 can include multiple busbars 200, which can be aluminum busbars, but are not limited to this.

[0037] The acquisition circuit 300 is electrically connected to the bus 200 and is used to collect signals such as pressure and temperature of the battery cells and output the signals, for example, to a signal processing terminal. The acquisition circuit 300 is made of a flexible material, such as a flexible flat cable (FFC).

[0038] As shown in Figure 1, the battery cells are arranged along a first direction (i.e., along the direction in which the battery cells stack together). The busbar 200 is also arranged along the first direction. The collection circuit 300 extends along the first direction. The end of the collection circuit 300, located near the busbar 200, bends along a second direction and connects to the busbar 200. The first direction (X direction) intersects the second direction (Y direction). In one embodiment, the second direction is perpendicular to the first direction, meaning that the collection circuit 300 bends at a 90° angle.

[0039] The collection line 300 needs to be bent to connect to each busbar 200. There is a crease at the bend of the collection line 300. When the side of the bent portion 310 of the collection line 300 away from the bracket 100 is subjected to external force, such as the pressure of the battery cover, the side of the bent portion 310 close to the bracket 100 and the side away from the bracket 100 will be squeezed. As a result, the crease of the collection line 300 is easily broken due to the squeezing force, affecting the normal operation of the battery collection assembly and thus shortening the battery life.

[0040] As shown in FIG2 , the present application provides an opening 110 on the bracket 100 at a position corresponding to the bent portion 310 of the acquisition circuit 300. When the bent portion 310 is squeezed by an external force, the opening 110 provides a space for the bent portion 310 to avoid and buffer, thereby reducing the risk of the bent portion 310 being broken due to the external force, thereby improving the service life of the acquisition circuit and further improving the life of the battery.

[0041] In one embodiment, the distance between the edge of the opening 110 and the edge of the bent portion 310 is 1 mm to 2 mm, so that the range of the opening 110 is slightly larger than the bent portion 310, so as to avoid interference with the bracket 100 when the bent portion 310 is squeezed by the battery cover and deviates toward one side of the opening 110, and at the same time avoid the range of the opening 110 being too large to affect the supporting performance of the bracket 100.

[0042] In one embodiment, as shown in FIG1 , the busbar 200 includes a cell connection portion 201 and a line connection portion 202 connected to the cell connection portion 201 , wherein the cell connection portion 201 is connected to the cell, and the line connection portion 202 is connected to the collection line 300 ;

[0043] The circuit connection portion 202 is sunken toward the side close to the bracket 100 , and the height difference between the plane where the circuit connection portion 202 is located and the plane where the cell connection portion 201 is located is 1 mm to 2 mm.

[0044] By sinking the line connection portion 202 so that the plane where the line connection portion 202 is located is lower than the plane where the battery cell connection portion 201 is located, the collection line 300 is connected to the sunken line connection portion 202. This can reduce the space occupied by the collection line 300 and the busbar 200 in a direction perpendicular to the busbar 200, thereby avoiding interference between the connection between the collection line 300 and the busbar 200 and the upper cover of the battery.

[0045] In one embodiment, the battery cell has two opposite end faces and a side face between the two end faces, the battery cell has a pole, and the pole protrudes from one of the end faces. The busbar 200 is arranged on the end face of the battery cell having the pole and is electrically connected to the pole. Therefore, the line connection portion 202 can be arranged between the poles of two adjacent battery cells, wherein the distance between the two adjacent poles is greater than the width of the line connection portion 202 along the direction parallel to the busbar 200 (X direction), so that the line connection portion 202 can be accommodated between the two adjacent poles. For example, when the distance between the two adjacent poles is 54 mm, the design width of the line connection portion 202 needs to be less than 54 mm. The present application utilizes the space between the two adjacent poles to accommodate the sunken line connection portion 202, which can reasonably utilize the space and reduce the installation height in the direction perpendicular to the busbar 200.

[0046] In some embodiments, adjacent battery cells are spaced apart, i.e., there is a gap between the sides of adjacent battery cells, and the circuit connection portion 202 may also be disposed between the gaps. The distance between the sides of the adjacent battery cells is greater than the width of the circuit connection portion 202 in a direction parallel to the busbar 200, so that the circuit connection portion 202 can be accommodated between the sides of the adjacent battery cells. The present application utilizes the gap between the sides of the adjacent battery cells to accommodate the sunken circuit connection portion 202, which can rationally utilize space and reduce the installation height perpendicular to the busbar 200.

[0047] In one embodiment, as shown in FIG3-FIG4 , the line connection portion 202 includes a line connection area 203 and a non-line connection area 204 . The acquisition line 300 is connected to the line connection area 203 . The thickness of the line connection area 203 is smaller than that of the non-line connection area 204 .

[0048] Since the collection line 300 and the busbar 200 are usually connected by welding, and the welding points often need to be protected by glue, but due to insufficient space, the protective glue 205 is likely to be too high and interfere with the upper cover of the battery. Therefore, the present application thins the connection area between the line connection part 202 and the collection line 300, that is, the thickness of the line connection area 203 is made smaller than the thickness of the non-line connection area 204, so as to provide space for the protective glue 205 and prevent the height of the protective glue 205 from interfering with the upper cover of the battery.

[0049] In one embodiment, the thickness of the circuit connection area 203 is 0.5mm-1mm thinner than the thickness of the non-circuit connection area 204. For example, if the thickness of the non-circuit connection area 204 is 1.5mm, the thickness of the circuit connection area 203 can be set to 1mm. Setting the thickness reduction range of the circuit connection area 203 to 0.5mm-1mm provides space for the protective adhesive 205, preventing interference between the protective adhesive 205 and the upper cover, while also preventing the circuit connection area 203 from being too thin and affecting its basic performance.

[0050] In one embodiment, the thickness of the protective adhesive 205 in a direction perpendicular to the busbar 200 is less than 2 mm. By controlling the thickness of the protective adhesive 205, excessive thickness can be avoided to prevent interference with the upper cover. For example, the thickness of the protective adhesive 205 in the circuit connection area 203 can be set to 1.5 mm, 1.8 mm, etc., reducing the thickness of the protective adhesive 205 while still ensuring its basic protective function. Specifically, the thickness of the protective adhesive 205 can be designed based on the actual process.

[0051] In one embodiment, the material of the protective glue 205 may be UV glue, but is not limited thereto.

[0052] By controlling the thickness of the protective adhesive 205 to avoid interference between the protective adhesive 205 and the upper cover of the battery, the spatial layout of the busbar 200 is optimized.

[0053] In one embodiment, a connecting piece 206 is further provided between the collection circuit 300 and the circuit connection portion 202. The connecting piece 206 is disposed on the busbar 200 to connect the collection circuit 300 and the busbar 200. In one embodiment, the connecting piece 206 is disposed in the circuit connection region 203, and the collection circuit 300 is electrically connected to the connecting piece 206. The connecting piece 206 may be, but is not limited to, a nickel sheet.

[0054] In one embodiment, as shown in FIG1 , the plurality of busbars 200 include two output-stage busbars 210 and a plurality of series busbars 220 . The two output-stage busbars 210 are respectively located at two ends of the bracket 100 along the first direction (X direction), and the series busbar 220 is located between the two output-stage busbars 210 .

[0055] In one embodiment, as shown in FIG1 , two rows of busbars 200 are provided on a bracket 100 , each row of busbars 200 includes a plurality of series busbars 220 and an output-stage busbar 210 , and the output-stage busbar 210 is located at one end of the row of busbars 200 . The two output-stage busbars 210 of two adjacent rows of busbars 200 are respectively located at both ends of the bracket 100 along a first direction (X direction). One of the two output-stage busbars 210 is connected to the positive electrode of the battery cell, and the other is connected to the negative electrode of the battery cell. Each series busbar 220 is respectively connected to two adjacent battery cells, so that the multiple battery cells form a series structure.

[0056] As shown in Figure 3, the output stage busbar 210 includes a first line connection portion 212 and a first battery cell connection portion 211. The first line connection portion 212 is located at the edge of the first battery cell connection portion 211. The first battery cell connection portion 211 is fixedly connected to the battery cell. The first line connection portion 212 is fixedly connected to the bracket 100, and the collection line 300 is connected to the first line connection portion 212.

[0057] As shown in Figure 4, the series bus 220 includes a second line connection portion 222 and two second battery cell connection portions 221. The second line connection portion 222 is located between the two second battery cell connection portions 221. The two second battery cell connection portions 221 are respectively fixedly connected to two adjacent battery cells. The second line connection portion 222 is fixedly connected to the bracket 100, and the collection line 300 is connected to the second line connection portion 222.

[0058] In one embodiment, as shown in FIG. 5 , the output bus 210 is connected to the bracket 100 by snap-fit ​​connection.

[0059] Because the output busbar 210 is located at the end of the bracket 100, the output busbar 210 is typically fixed to the bracket 100 at a single point. As shown in FIG3 , the fixing point 213 between the output busbar 210 and the bracket 100 is typically located on the first circuit connection portion 212, while the first cell connection portion 211 has no fixed connection point with the bracket 100. Therefore, the output busbar 210 is prone to the risk of being accidentally detached. This application provides a clip 214 on the bracket 100, and secures the first cell connection portion 211 to the bracket 100 via the clip 214 to prevent the output busbar 210 from being accidentally detached.

[0060] In one embodiment, the output stage busbar 210 defines a snap connection area 2111 and a non-snap connection area 2112 , and the thickness of the snap connection area 2111 is smaller than that of the non-snap connection area 2112 .

[0061] By thinning the buckle connection area 2111 of the output stage bus 210 to reduce the installation height of the buckle 214 in the direction perpendicular to the bus 200, the output stage bus 210 and the bracket 100 can be fixed by the buckle 214 in a limited installation space.

[0062] In one embodiment, the thickness of the snap-fit ​​connection area 2111 is 0.5 mm to 1 mm thinner than the thickness of the non-snap-fit ​​connection area 2112. For example, if the thickness of the non-snap-fit ​​connection area 2112 is 1.5 mm, the thickness of the snap-fit ​​connection area 2111 can be set to 1 mm. Setting the thickness reduction range of the snap-fit ​​connection area 2111 to 0.5 mm to 1 mm provides assembly space for the snap and prevents interference between the snap and the upper cover, while also preventing the snap-fit ​​connection area 2111 from being too thin, thereby affecting its basic performance.

[0063] In one embodiment, as shown in FIG1 , the battery collection assembly further includes a printed circuit board (PCB) 400 . One end of the collection line 300 is electrically connected to the PCB 400 , and the other end of the collection line 300 is bent toward and electrically connected to the bus 200 . In one embodiment, the PCB 400 may be a printed circuit board.

[0064] In one embodiment, as shown in FIG1 , a circuit board 400 is located at one end of a bracket 100 , and a collection circuit 300 is located on the same side of a row of bus bars 200 . The collection circuit 300 includes multiple conductors, one end of each conductor extending from the circuit board 400 , bending when extending to the corresponding bus bar 200 , and extending toward the bus bar 200 to be electrically connected to the bus bar 200 .

[0065] In one embodiment, the battery acquisition assembly further includes a connector 410, which is disposed on the circuit board 400 and electrically connected to the circuit board 400. The connector 410 is used to transmit the acquired signal to a battery management system (BMS).

[0066] 6 , the bracket 100 includes a blister bracket 10 and a plastic bracket 20 . The circuit board 400 is fixed on the plastic bracket 20 and is electrically connected to the acquisition circuit 300 .

[0067] The blister bracket 10 is integrally formed using a blister molding process. The blister bracket 10 can be made of a plastic material such as, but not limited to, polycarbonate (PC) or acrylonitrile butadiene styrene (ABS). The blister molding process offers low mold costs, short production times, and a short mold development time (typically only 3 to 5 days), significantly reducing mold costs and development cycles. Furthermore, the blister bracket 10 is lighter than the plastic bracket 20, helping to reduce the weight of the battery collection assembly 1. This, in turn, reduces the weight of the battery, increases the energy density of the battery system, and improves the product's battery life.

[0068] The acquisition circuit 300 is fixed to the first end surface of the blister bracket 10. The acquisition circuit 300 is a flexible flat cable, such as a flexible flat cable (FFC). The busbar 200 is also fixed to the first end surface of the blister bracket 10 and is disposed on both sides of the acquisition circuit 300. The busbar 200 on each side is electrically connected to the acquisition circuit 300.

[0069] The plastic bracket 20 is disposed on the second end face of the blister bracket 10 and is fixedly connected to the blister bracket 10. The plastic bracket 20 is formed using an injection molding process. The second end face is adjacent to the first end face, and the plastic bracket 20 being disposed on the second end face of the blister bracket 10 means that the plastic bracket 20 is disposed at the position of the second end face of the blister bracket 10, so that the plastic bracket 20 is close to the second end face of the blister bracket 10. It does not necessarily require that the plastic bracket 20 be fixed to or located on the second end face of the blister bracket 10. The circuit board 400 is fixed to the plastic bracket 20 and is electrically connected to the acquisition circuit 300.

[0070] In this embodiment, by replacing part of the plastic bracket 20 in the battery collection assembly 1 with a blister bracket 10, the mold cost of the blister bracket 10 is low, mold repair or modification is relatively convenient, and the mold design and production cycle is short, resulting in low costs. This solves the problem of high costs caused by the use of plastic brackets 20 in CCS assemblies in related technologies. Moreover, the blister bracket 10 is lighter than the plastic bracket 20, which helps reduce the weight of the battery collection assembly 1, thereby reducing the weight of the battery, increasing the energy density of the battery system, and improving the battery life of the product. At the same time, the battery collection assembly 1 of this application also retains part of the plastic bracket 20 to fix the circuit board 400 and provide better installation and positioning when assembling the CCS assembly.

[0071] In one embodiment, referring to Figures 6 and 7 , a first mounting groove 11 is provided in the middle portion of the first end surface of the blister bracket 10. The collection circuit 300 is located within the first mounting groove 11 and is secured to the blister bracket 10. In one embodiment, an adhesive backing is provided on the side of the collection circuit 300 proximate to the blister bracket 10, and the collection circuit 300 is adhered and secured within the first mounting groove 11 via the adhesive backing. The first mounting groove 11 of the blister bracket 10 is used to locate the installation position of the collection circuit 300, and the adhesive backing provided on the side of the collection circuit 300 proximate to the blister bracket 10 ensures that the collection circuit 300 is securely mounted within the first mounting groove 11.

[0072] The acquisition circuit 300 extends from the blister bracket 10 to the plastic bracket 20 and is connected to the circuit board 400 on the plastic bracket 20 .

[0073] Referring to Figures 8 and 9, the plastic bracket 20 includes a fixing portion 21 and an extension portion 22. The fixing portion 21 is fixed to the third end surface of the blister bracket 10. The extension portion 22 extends from the fixing portion 21 in a direction away from the blister bracket 10. The first end surface and the third end surface are two opposing end surfaces of the blister bracket 10, and the second end surface is connected to the first end surface and the third end surface. In other words, the first end surface and the third end surface are the upper and lower surfaces of the blister bracket 10, respectively, and the second end surface is a side surface of the blister bracket 10. The extension portion 22 extends in a direction parallel to the first end surface and toward the third end surface.

[0074] In one embodiment, the fixing portion 21 is provided with a plurality of first heat-riveted studs 211, and the blister bracket 10 is provided with a plurality of first positioning holes 101 corresponding to the first heat-riveted studs 211. The first heat-riveted studs 211 cooperate with the first positioning holes 101 to secure the fixing portion 21 to the blister bracket 10, thereby securing the plastic bracket 20 to the third end surface of the blister bracket 10. The use of heat-riveted connection between the plastic bracket 20 and the blister bracket 10 enhances the connection stability between the plastic bracket 20 and the blister bracket 10, facilitates positioning during connection, improves positional connection accuracy, and provides greater operational convenience.

[0075] The extension portion 22 has a mounting surface facing away from the blister bracket 10, and the circuit board 400 is mounted on this mounting surface. In one embodiment, a plurality of first heat rivet studs 221 are provided on the mounting surface of the extension portion 22, and a plurality of second positioning holes 420 are correspondingly provided on the circuit board 400. The first heat rivet studs 221 pass through the second positioning holes 420 to secure the circuit board 400 to the extension portion 22. The acquisition circuit 300 extends from the blister bracket 10 to the mounting surface and is electrically connected to the circuit board 400. Optionally, a protective cover 50 is provided at the connection between the acquisition circuit 300 and the circuit board 400 to protect the acquisition circuit 300.

[0076] The present application adopts the method of connecting the blister bracket 10 and the plastic bracket 20 so that a portion of the plastic bracket 20 is retained in the battery collection component 1 to fix the circuit board 400, thereby achieving a better installation limit effect when assembling the battery collection component 1.

[0077] Continuing with Figures 6 to 9 , the battery temperature collection assembly 1 further includes multiple temperature sensors 30, each of which is connected between the busbar 200 and the temperature collection circuit 300. The temperature collection circuit 300 includes a main body 301 and a first branch 302 and a second branch 303 connected to the main body 301. One end of the first branch 302 is connected to the main body 301, and the other end is connected to the temperature sensor 30. One end of the second branch 303 is connected to the main body 301, and the other end is connected to the busbar 200.

[0078] The first branch portion 302 is used to collect temperature signals through the temperature sensor 30, and the second branch portion 23 is used to collect voltage signals through the connecting piece 206. The temperature signal collected by the first branch portion 302 and the voltage signal collected by the second branch portion 303 are transmitted to the connector 410 on the circuit board 400 through the main body 301.

[0079] In one embodiment, the connecting piece 206 is mounted on the first end surface of the busbar 200. The tail copper conductor of the second branch portion 303 is in full contact with the connecting piece 206 on the busbar 200 and is soldered to the connecting piece 206, thereby connecting the second branch portion 303 to the corresponding busbar 200 through the connecting piece 206. The busbar 200 comprises an aluminum busbar.

[0080] A plurality of integrally formed second mounting grooves 12 are provided on both sides of the first end surface of the blister bracket 10. The second mounting grooves 12 are located on both sides of the first mounting groove 11. At least two vertically upward third heat rivet studs 13 are provided in the second mounting grooves 12. The busbar 200 is provided with a plurality of vertically extending third positioning holes. The third positioning holes of the busbar 200 are used to position and install the busbar 200 in the second mounting grooves 12 via the third heat rivet studs 13 of the blister bracket 10. The second mounting groove 12 of the blister bracket 10, the third hot rivet column 13, and the third positioning hole on the busbar 200 increase the reliability of the fixation of the busbar 200. The busbar 200 is fixed to the blister bracket 10 by hot riveting, which can effectively prevent the busbar 200 from falling off on the collection structure before welding with the battery core; at the same time, the mounting groove of the blister bracket 10 is effectively used to position the collection circuit 300 and the busbar 200, reducing the height difference between the collection circuit 300 and the busbar 200, reducing the difficulty of welding, and effectively improving production efficiency.

[0081] It is understood that to reduce the weight of the battery collection assembly 1, the blister bracket 10 may further be provided with a first through-hole 102 and a second through-hole 103. The first through-hole 102 is located between the collection line 300 and the busbar 200, and the second through-hole 103 is located between two collection lines 300. Both the first through-hole 102 and the second through-hole 103 are formed by hollowing out the blister bracket 10.

[0082] The present application also provides a battery, including a cell group and the above battery collection component 1, wherein the battery collection component 1 is installed at the upper end of the cell group, and a busbar 200 is laser welded to the upper end of the cell group.

[0083] The battery pack includes multiple cells arranged in an array. Each cell has a terminal at one end, and the battery collection assembly is located at this terminal end of the cell pack. The positive and negative terminals of the multiple cells are arranged in two rows. The blister bracket 10 is positioned at the terminal ends of the cells, allowing the positive and negative terminals of the cells to protrude from the bracket 10 for connection to the busbar 200.

[0084] Exemplarily, two battery cells form a group, the positive electrode posts of a group of battery cells are located in the same row, the negative electrode posts are located in the same row, and the positive electrode posts of two adjacent groups of battery cells are located in two different rows, that is, the positive electrode posts of the first and second battery cells are located on the same side, the positive electrode posts of the third and fourth battery cells are located on the other side, and so on. The positive electrode posts of the first group of battery cells are connected in parallel through a bus bar 200, the negative electrode posts of the first group and the positive electrode posts of the second group are connected in series through a bus bar 200, the negative electrode posts of the second group and the positive electrode posts of the third group are connected in series through a bus bar 200, until the negative electrode posts of the last group of battery cells are connected in parallel through a bus bar 200. A first output terminal 41 is led out from the bus bar 200 connected to the first group, and a second output terminal 42 is led out from the bus bar 200 connected to the last group, that is, the first output terminal 41 is the positive electrode of the battery, and the second output terminal 42 is the negative electrode of the battery. The first output end 41 is located at the second end face of the blister bracket 10 , and the second output end 42 is located at the fourth end face of the blister bracket 10 . The fourth end face is connected to the first end face and the third end face, and the fourth end face is opposite to the second end face.

[0085] It is understood that in the embodiment of the present application, by replacing part of the plastic bracket 20 in the battery collection assembly 1 with a blister bracket 10, the mold cost of the blister bracket 10 is low, mold repair or modification is relatively convenient, and the mold design and production cycle is short, resulting in low costs. This solves the problem of high costs caused by the use of plastic brackets 20 in CCS components in related technologies. Moreover, the blister bracket 10 is lighter than the plastic bracket 20 as a single part, which helps to reduce the weight of the battery collection assembly 1, thereby reducing the weight of the battery, increasing the energy density of the battery system, and improving the battery life of the product. At the same time, the battery collection assembly 1 of the present application also retains part of the plastic bracket 20 to fix the circuit board 400 and play a better installation limit role when assembling the CCS assembly.

[0086] The battery collection assembly 1 includes: a bracket 100; a busbar 200, which is arranged on the bracket 100 and is configured to connect battery cells; a collection circuit 300, which is arranged on the bracket 100 and electrically connected to the busbar 200; wherein the collection circuit 300 has a bend 310, and the bracket 100 is provided with an opening 110 corresponding to the bend 310.

[0087] In one embodiment, the battery further includes a shell and an upper cover. The shell has a receiving cavity, in which the battery cell group and the battery collection assembly 1 are both accommodated. The shell has an open side, which is opposite to the battery collection assembly 1. The upper cover covers the open side and is fixedly connected to the shell.

[0088] The battery may be a square battery, but is not limited thereto.

[0089] The present application also provides an electric vehicle, which uses the battery described above.

[0090] Embodiments of the present application provide a battery collection assembly, a battery, and an electric vehicle. An opening is provided on the bracket at a position corresponding to the bent portion of the collection line. When the bent portion is squeezed by an external force, the opening provides an escape space for the bent portion, thereby reducing the risk of the bent portion of the collection line being broken due to the external force, thereby improving the service life of the battery.

Claims

1. A battery collection component, comprising: Bracket; A busbar, disposed on the bracket, and configured to connect the battery cells; as well as A collection circuit is arranged on the bracket and is electrically connected to the busbar; Wherein, the collection line has a bending portion, and the bracket is provided with an opening corresponding to the bending portion.

2. The battery collection assembly according to claim 1, characterized in that: The collection line extends along a first direction, and one end of the collection line close to the bus is bent along a second direction and connected to the bus, wherein the first direction intersects with the second direction.

3. The battery collection assembly according to claim 1, wherein: The busbar comprises a cell connection portion and a line connection portion connected to the cell connection portion, the cell connection portion is configured to be connected to the cell, and the line connection portion is configured to be connected to the collection line; The circuit connection portion sinks toward a side close to the bracket, and a height difference between a plane where the circuit connection portion is located and a plane where the battery cell connection portion is located is 1 mm to 2 mm.

4. The battery collection assembly according to claim 3, wherein: The battery cell has two opposite end faces, and the pole of the battery cell protrudes from one of the end faces; The distance between two adjacent poles is greater than the width of the line connection portion along a direction parallel to the busbar, and the line connection portion is arranged between the poles of two adjacent battery cells.

5. The battery collection assembly according to claim 3, wherein: The battery core has two opposite end surfaces and a side surface located between the two end surfaces; The distance between the side surfaces of two adjacent battery cells is greater than the width of the circuit connection portion along a direction parallel to the busbar, and the circuit connection portion is arranged between the side surfaces of two adjacent battery cells.

6. The battery collection assembly according to claim 3, wherein: The line connection portion includes a line connection area and a non-line connection area, the acquisition line is connected to the line connection area, and the thickness of the line connection area is smaller than the thickness of the non-line connection area.

7. The battery collection assembly according to claim 3, wherein: The plurality of busbars include two output-level busbars and a plurality of series busbars, the two output-level busbars are respectively located at two ends of the bracket along the first direction, and the series busbar is located between the two output-level busbars; The output stage busbar comprises a first line connection portion and a first battery cell connection portion, wherein the first line connection portion is located at an edge of the first battery cell connection portion, and the first battery cell connection portion is connected to the battery cell; The series busbar includes a second line connection portion and two second battery cell connection portions, the second line connection portion is located between the two second battery cell connection portions, and the two second battery cell connection portions are respectively connected to the two battery cells.

8. The battery collection assembly according to claim 7, wherein: The output stage busbar is provided with a snap connection area and a non-snap connection area, and the thickness of the snap connection area is smaller than the thickness of the non-snap connection area.

9. The battery collection assembly according to any one of claims 3 to 8, wherein: A protective glue is provided at the connection between the collection line and the line connection part, and the thickness of the protective glue in a direction perpendicular to the bus bar is less than 2 mm.

10. The battery collection assembly according to claim 1, wherein: The bracket includes a blister bracket and a plastic bracket. The busbars are arranged on both sides of the collection circuit. The collection circuit and the busbars are fixed to the first end face of the blister bracket. The busbars on each side are electrically connected to the collection circuit. The plastic bracket is arranged on the second end face of the blister bracket and is fixedly connected to the blister bracket. The second end face is adjacent to the first end face. The battery collection component also includes a circuit board, which is fixed on the plastic bracket and electrically connected to the collection circuit.

11. The battery collection assembly according to claim 10, wherein: The plastic bracket comprises a fixing portion and an extending portion, wherein the fixing portion is fixed to the third end surface of the blister bracket, and the extending portion extends from the fixing portion toward a direction away from the blister bracket.

12. The battery collection assembly according to claim 11, wherein: The fixing part is provided with a plurality of first heat riveting columns, the blister bracket is provided with a plurality of first positioning holes corresponding to the first heat riveting columns, and the first heat riveting columns cooperate with the first positioning holes to fix the fixing part on the blister bracket.

13. The battery collection assembly according to claim 11, wherein: The extension portion has a mounting surface, the mounting surface is away from the blister bracket, the circuit board is mounted on the mounting surface, the acquisition circuit extends from the blister bracket to the mounting surface, and is electrically connected to the circuit board.

14. The battery collection assembly according to claim 13, wherein: The battery collection component also includes a connector, and the connector is fixed on the circuit board.

15. The battery collection assembly according to any one of claims 10 to 14, wherein: The battery collection component also includes a plurality of temperature sensors, each of which is connected between the bus and the collection line.

16. The battery collection assembly according to claim 15, wherein: The acquisition circuit includes a main body and a first branch, one end of the first branch is connected to the main body, and the other end of the first branch is connected to the temperature sensor.

17. The battery collection assembly according to claim 16, wherein: The collection line further includes a second branch portion, one end of the second branch portion is connected to the main body portion, and the other end of the second branch portion is connected to the bus bar.

18. The battery collection assembly according to claim 17, wherein: The busbar is provided with a connecting piece, and the second branch portion is connected to the corresponding busbar through the connecting piece.

19. A battery, comprising the battery collection assembly according to any one of claims 1 to 18.

20. An electric vehicle comprising the battery according to claim 19.

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