CCS assembly and battery module

Abstract

The invention relates to the technical field of power batteries, and provides a CCS assembly and a battery module, the battery module comprises a plurality of battery cells arranged in a stacked mode, the CCS assembly comprises a wiring harness plate, a circuit board, a reinforcing assembly and a temperature collecting element, the wiring harness plate comprises a first surface and a second surface which are opposite to each other, the wiring harness plate is used for being installed on top covers of the battery cells in the Z direction, and the first surface and the second surface are opposite to each other. The first surface faces the top covers of the multiple battery cells, the circuit board is installed on the second surface of the wire harness plate in the Z direction, the reinforcing assembly is fixedly installed on the wire harness plate and comprises a reinforcing plate, the temperature collecting element is connected with the reinforcing plate and electrically connected with the circuit board, and the temperature collecting element is used for making heat conduction contact with the top covers of the battery cells so as to collect the temperature of the top covers of the battery cells. According to the scheme, the problem that the difference between the acquired temperature and the actual working temperature of the battery cell is relatively large because the temperature of the connecting chip between the battery cells is acquired as the working temperature of the battery cell in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a CCS assembly and a battery module. Background Art

[0002] Operating temperature is crucial to the electrical performance and safety of battery cells. Existing technologies usually collect the temperature of the connecting tabs between battery cells as the operating temperature of the battery cells for temperature monitoring to ensure the safe and reasonable use of the battery.

[0003] The operating temperature of the battery cell refers to the temperature of the battery cell body. The temperature of the battery cell body needs to be transferred to the battery cell casing first, and then transferred to the battery plate from the battery cell casing. Alternatively, the temperature of the battery cell body needs to be transferred to the pole first, and then transferred to the pole from the pole. Both of the above heat transfer paths are long, and there is heat loss during the heat transfer process. The collected temperature not only has a lag, but also has a large difference from the actual operating temperature of the battery cell. Summary of the Invention

[0004] In view of this, the present application provides a CCS component and battery module to solve the problem in the prior art that the temperature of the connecting tabs between battery cells is collected as the operating temperature of the battery cells, and the collected temperature is significantly different from the actual operating temperature of the battery cells.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A CCS assembly is used for a battery module, wherein the battery module includes a plurality of stacked battery cells. The CCS assembly includes:

[0007] A wiring harness plate, comprising a first surface and a second surface opposite to each other, the wiring harness plate being used to be mounted on the top covers of the plurality of battery cells along the Z direction, with the first surface facing the top covers of the plurality of battery cells;

[0008] a circuit board mounted on the second surface of the wiring harness plate along the Z direction;

[0009] A reinforcement assembly is fixedly mounted on the wiring harness plate, wherein the reinforcement assembly includes a reinforcement plate;

[0010] A temperature collecting element is connected to the reinforcing plate and electrically connected to the circuit board. The temperature collecting element is used to be in thermal contact with the top cover of the battery cell to collect the temperature of the top cover of the battery cell.

[0011] Optionally, the wiring harness plate is an insulating plastic board, and the thickness of the wiring harness plate is 0.4mm-0.6mm.

[0012] Optionally, the second surface of the wiring harness plate has a mounting groove that is recessed toward the first surface along the Z direction, the reinforcing plate is positioned and installed in the mounting groove, the reinforcing plate is provided with a first through-hole, and the bottom of the mounting groove is provided with a second through-hole;

[0013] The CCS assembly further includes a thermal pad, one end of which abuts against the temperature collecting element, and the other end of which passes through the first through-hole and the second through-hole to abut and connect with the top cover of the battery cell.

[0014] Optionally, along the Z direction, one of the mounting groove and the reinforcing plate is provided with a limiting protrusion, and the other is provided with a limiting space, the limiting protrusion extends into the limiting space, and the limiting protrusion and the limiting space are limited and matched within the plane where the bottom of the mounting groove is located.

[0015] Optionally, the circuit board includes a body and a collection arm extending from the body, the collection arm is mounted on the area of ​​the reinforcing plate surrounding the first through-hole and is fixedly connected to the reinforcing plate, and the temperature collection element is provided on the collection arm;

[0016] The reinforcement assembly further includes a pressing member, which is provided on a surface of the collection arm facing away from the reinforcement plate. The pressing member, the collection arm and the reinforcement plate are fixedly connected to press the collection arm onto the reinforcement plate.

[0017] Optionally, the CCS assembly further includes a tab, the tab being provided on the second surface of the wiring harness plate, the tab being used for fixedly connecting to the pole of the battery cell of the battery module;

[0018] At least one side edge of the reinforcing plate extends between the tab and the wiring harness plate, and the tab presses the reinforcing plate tightly into the mounting groove.

[0019] Optionally, the bar that applies pressure to the reinforcing plate is provided with an avoidance gap, and the area of ​​the reinforcing plate opposite to the collecting arm, the collecting arm and the temperature collecting element are all located in the avoidance gap.

[0020] Optionally, a tab groove is provided on the second surface of the wiring harness plate, the tab is provided in the tab groove, a third through-hole is provided at the bottom of the tab groove, the third through-hole is used for the pole to pass through, and the tab is fixedly connected;

[0021] The outer contour dimension of the cross section of the third through hole is larger than the outer contour dimension of the cross section of the pole matched therewith;

[0022] There are multiple tabs, and the tab slots include a first slot and a second slot. The tabs located in the first slot and the second slot are respectively used to cooperate with different poles. The area between the first slot and the second slot forms a mounting area, and the main body of the circuit board is disposed in the mounting area.

[0023] Both ends of the installation groove are respectively located in the first groove and the second groove, and the middle portion of the installation groove is opened in the installation area.

[0024] Optionally, the portion of the reinforcing plate located in the mounting groove is provided with a support bar protruding in a direction away from the wiring harness plate, the main body is supported on the support bar, the area of ​​the reinforcing plate opposite to the collecting arm has a boss, and the collecting arm is provided on the boss so that the collecting arm is coplanar with the main body.

[0025] A battery module comprising the CCS assembly of any one of the above items, wherein the battery module comprises a plurality of stacked battery cells, the CCS assembly being mounted on the top covers of the plurality of battery cells along the Z direction, and the temperature collecting element being in thermal contact with the top covers of the battery cells;

[0026] The battery cell includes an insulating layer, which is attached to the top cover of the battery cell. The insulating layer is provided with a temperature collection window. The CCS component includes a thermal pad, one end of which abuts the temperature collection element, and the other end passes through the temperature collection window and abuts the top cover of the battery cell.

[0027] In the embodiment of the present application, the temperature collecting element collects the temperature of the top cover of the battery cell as the working temperature of the battery cell. The top cover of the battery cell is part of the shell of the battery cell. Therefore, compared with the prior art method of collecting the temperature of the connecting tabs between the battery cells as the working temperature of the battery cell, the embodiment of the present application saves the process of transferring heat from the battery cell shell to the tabs, shortens the heat transfer path, and makes the difference between the temperature collected by the temperature collecting element and the actual working temperature of the battery cell smaller, solving the problem in the prior art of collecting the temperature of the connecting tabs between the battery cells as the working temperature of the battery cell, and the large difference between the collected temperature and the actual working temperature of the battery cell. In addition, applying the CCS component in the embodiment of the present application to the battery system can improve the safety and reliability of the battery system.

[0028] In addition, the temperature sensing element is connected to the reinforcement plate, which is a rigid structure. Fixedly installing the reinforcement plate on the wiring harness plate can reduce the local deformation of the wiring harness plate in a vibration environment, and alleviate the problem of the temperature sensing element being separated from the contact surface of the top cover of the battery cell due to the vibration deformation of the wiring harness plate when the temperature sensing element is directly connected to the wiring harness plate. It maintains a stable heat conduction path, provides a more stable and reliable installation position for the temperature sensing element, and keeps stable contact between the temperature sensing element and the top cover of the battery cell, so that the temperature sensing element can accurately sense the temperature of the top cover of the battery cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0030] Figure 1 A schematic diagram of the structure of the CCS component provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of the wiring harness board provided in an embodiment of the present application;

[0032] Figure 3 A top view of the wiring harness plate provided in an embodiment of the present application;

[0033] Figure 4 A schematic diagram of the partial structure of the wiring harness plate provided in an embodiment of the present application;

[0034] Figure 5 An exploded view of the reinforcement assembly and the thermal pad at the first angle provided in an embodiment of the present application;

[0035] Figure 6 An exploded view of the reinforcing assembly and the thermal pad at a second angle provided in an embodiment of the present application;

[0036] Figure 7 A diagram showing the positional relationship between the reinforcement assembly, the tab, and the circuit board provided in an embodiment of the present application;

[0037] Figure 8 A schematic diagram of the coordination structure of the reinforcement assembly, the tab, and the circuit board provided in an embodiment of the present application;

[0038] Figure 9 Schematic diagram of the body, collection arm and structure provided in the embodiment of this application;

[0039] Figure 10 A schematic diagram of the structure of the body, collection arm and temperature collection element provided in an embodiment of the present application;

[0040] Figure 11 A schematic diagram of the structure of a battery module provided in an embodiment of the present application;

[0041] Figure 12 An exploded view of a battery module provided in an embodiment of the present application;

[0042] Figure 13 A partial exploded view of the battery module provided in an embodiment of the present application.

[0043] exist Figures 1-13 middle:

[0044] 100, wiring harness plate; 110, mounting slot; 111, second through-hole; 112, limiting space; 120, first slot; 130, second slot; 140, third through-hole; 150, mounting area;

[0045] 200, circuit board; 210, body; 220, collection arm;

[0046] 300, reinforcement assembly; 310, reinforcement plate; 311, boss; 3111, first perforation; 312, limiting protrusion; 313, support bar; 320, pressing member;

[0047] 410, temperature collecting element; 420, thermal pad;

[0048] 500, Piece; 510, Avoid Gap;

[0049] 610, hot riveting stud; 620, hot riveting hole;

[0050] 700, battery cell; 710, temperature sampling window; 720, pole;

[0051] 800. End cap. DETAILED DESCRIPTION

[0052] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0053] like Figures 1 to 13 As shown, embodiments of the present application provide a CCS (Cells Contact System, integrated busbar) assembly and a battery module. The provided CCS assembly is used in a battery module, which includes a plurality of stacked battery cells 700. The plurality of battery cells 700 can be electrically connected in series, parallel, or a combination of series and parallel to form a battery module.

[0054] The battery cell involved in the embodiments of the present application may be a secondary battery or a primary battery, and the battery cell may be a lithium-sulfur battery, a sodium-ion battery, a lithium-ion battery or a magnesium-ion battery, but is not limited thereto.

[0055] A battery cell typically includes a cell body and a top cover, which together enclose the cell's interior. In some examples, the cell body has an opening, and the top cover fits over the opening. The opening may be at one end of the cell body or at opposite ends of the cell body. The cell body and top cover may be, but are not limited to, metal materials such as aluminum or steel. The top cover may be configured with one or more poles, depending on the conventional configuration.

[0056] The internal space of the battery cell is loaded with electrode assemblies and electrolyte. The electrode assembly usually includes a positive electrode sheet, a negative electrode sheet and a separator separating the positive electrode sheet and the negative electrode sheet. The electrolyte can penetrate into the interior of the electrode assembly, providing an ion migration path for the electrode assembly to carry out electrochemical reactions and play a conductive role. The electrode assembly can be in the form of a winding type, a stacked type, etc. One or more electrode assemblies can be loaded in the battery cell. The positive electrode sheet has a positive electrode ear, the negative electrode sheet has a negative electrode ear, and the pole column on the top cover includes a positive pole column and / or a negative pole column. The positive pole ear is directly or indirectly electrically connected to the positive pole column, and the negative pole ear is directly or indirectly electrically connected to the negative pole column.

[0057] The CCS assembly in this embodiment is introduced in detail below: the CCS assembly includes a wiring harness board 100 , a circuit board 200 , a reinforcement assembly 300 and a temperature collection element 410 .

[0058] The wiring harness plate 100 serves as a mounting carrier for the circuit board 200, the reinforcement assembly 300, the tab 500, and other structures, thereby integrating the circuit board 200, the reinforcement assembly 300, and the tab 500. The wiring harness plate 100 includes a first surface and a second surface facing each other. The wiring harness plate 100 is mounted on the top cover of the battery cells 700 along the Z direction, with the first surface facing the top covers of the multiple battery cells 700 and the second surface facing away from the top covers of the multiple battery cells 700. The wiring harness plate 100 can be an insulating blister plate to achieve insulation from the battery cells 700. Its thickness can be 0.4 mm to 0.6 mm, for example, 0.4 mm, 0.5 mm, or 0.6 mm, and it can be made of PC (Polycarbonate) to reduce the cost and weight of the wiring harness plate 100.

[0059] The circuit board 200 is installed on the second surface of the wiring harness plate 100 along the Z direction. The circuit board 200 can be an FPC (Flexible Printed Circuit). The number of circuit boards 200 can be one or more. The circuit board 200 can be set on the wiring harness plate 100 by bonding, hot riveting, etc.

[0060] The reinforcement assembly 300 is fixedly mounted on the wiring harness plate 100. The reinforcement assembly 300 can be fixedly mounted on the wiring harness plate 100 by means of hot riveting, clamping, etc. The reinforcement assembly 300 includes a reinforcement plate 310. The reinforcement plate 310 is a rigid structure and can be made of rigid materials such as metal or hard plastic. The temperature sampling element 410 can be a temperature sensor, or it can be an element such as a thermocouple, thermal resistor, or thermistor. The temperature sampling element 410 is connected to the reinforcement plate 310 and electrically connected to the circuit board 200. The temperature sampling element 410 is used to make thermal contact with the top cover of the battery cell 700 to collect the temperature of the top cover of the battery cell 700 and transmit the collected temperature to the circuit board 200 for subsequent analysis, processing, and judgment.

[0061] In the embodiment of the present application, the temperature sampling element 410 collects the temperature of the top cover of the battery cell 700 as the operating temperature of the battery cell 700. The top cover of the battery cell 700 is part of the battery cell shell. Therefore, compared with the prior art method of collecting the temperature of the connecting tabs between battery cells as the operating temperature of the battery cell 700, the embodiment of the present application saves the process of transferring heat from the battery cell shell to the tabs, shortens the heat transfer path, and the difference between the temperature collected by the temperature sampling element 410 and the actual operating temperature of the battery cell 700 is small, which solves the problem in the prior art that the temperature of the connecting tabs between battery cells is collected as the operating temperature of the battery cell, and the difference between the collected temperature and the actual operating temperature of the battery cell is large. In addition, applying the CCS component in the embodiment of the present application to the battery system can improve the safety and reliability of the battery system.

[0062] Since the wiring harness board 100 is an insulating blister board with a relatively thin thickness and low strength, the reinforcement plate 310 can be provided to improve the strength of the wiring harness board 100. In addition, the temperature sensing element 410 is connected to the reinforcement plate 310, which is a rigid structure. The fixed installation of the reinforcement plate 310 on the wiring harness board 100 can reduce the local deformation of the wiring harness board 100 in a vibration environment, and alleviate the problem of the temperature sensing element 410 being separated from the contact surface of the top cover of the battery cell 700 due to the vibration deformation of the wiring harness board 100 when the temperature sensing element 410 is directly connected to the wiring harness board 100. It maintains a stable heat conduction path, provides a more stable and reliable installation position for the temperature sensing element 410, and ensures that the temperature sensing element 410 maintains stable contact with the top cover of the battery cell, so that the temperature sensing element 410 can accurately sense the temperature of the top cover of the battery cell 700.

[0063] The reinforcement assembly 300 may be mounted on the second surface of the wiring harness plate 100. In an optional embodiment, the reinforcement plate 310 may be attached to the second surface.

[0064] In the embodiment of the present application, the second surface of the wiring harness plate 100 may have a mounting groove 110 that is recessed toward the first surface along the Z direction, and the reinforcing plate 310 may be positioned and installed in the mounting groove 110. In this case, on the one hand, the mounting groove 110 can be used to position and install the reinforcing plate 310, thereby improving assembly efficiency. On the other hand, the problem that the reinforcing plate 310 protrudes from other areas of the wiring harness plate 100 along the Z direction due to the addition of the reinforcing plate 310 can be alleviated, thereby reducing the space occupied in the Z direction.

[0065] The reinforcing plate 310 is located on the second surface of the wiring harness plate 100, that is, the surface facing away from the top cover of the battery cell 700. The heating element 410 connected to the reinforcing plate 310 is also located on the side of the wiring harness plate 100 facing away from the top cover of the battery cell 700. In order to enable the heating element 410 to be in thermal contact with the top cover of the battery cell 700, the reinforcing plate 310 can be provided with a first through-hole 3111, and the bottom of the mounting groove 110 can be provided with a second through-hole 111. The heating element 410 can pass through the first through-hole 3111 and the second through-hole 111 to be in direct contact with the top cover of the battery cell 700 to collect the temperature of the top cover of the battery cell 700.

[0066] In an embodiment of the present application, the CCS component may further include a thermal pad 420, which may be a thermal adhesive pad or a thermal silicone pad, etc. One end of the thermal pad 420 may abut against the temperature sensing element 410, and the other end may pass through the first perforation 3111 and the second perforation 111, and abut against the top cover of the battery cell 700, so as to achieve thermal contact between the temperature sensing element 410 and the top cover of the battery cell 700 through the thermal pad 420. The provision of the thermal pad 420 can improve the heat conduction efficiency, so that the heat of the top cover of the battery cell 700 can be transferred to the temperature sensing element 410 more evenly and quickly, thereby improving the measurement accuracy and response speed; at the same time, the thermal pad 420 can also provide buffering protection, reducing the impact of mechanical shock on the temperature sensing element 410.

[0067] Along the Z direction, the cross-sectional shapes of the thermal pad 420, the first perforation 3111, and the second perforation 111 can be roughly the same, and the cross-sectional outer contour size of the thermal pad 420 can be smaller than the cross-sectional outer contour size of the first perforation 3111 and the second perforation 111. That is, along the Z direction, the projection of the thermal pad 420 is located within the projection of the first perforation 3111 and also within the projection of the second perforation 111. This design can effectively accommodate positional deviations in the processing of the first perforation 3111 and the second perforation 111, improve assembly tolerance, and thus improve the overall assembly efficiency and reliability of the CCS component. At the same time, the temperature collecting element 410 and the thermal pad 420 are accommodated by the first perforation 3111 and the second perforation 111. Since the position of the reinforcing component 300 relative to the top cover of the battery cell 700 remains unchanged, the temperature collecting element 410 and the thermal pad 420 can be limited in the horizontal direction, thereby preventing the battery cell 700 from expanding and causing the contact position of the temperature collecting element 410 and the thermal pad 420 to shift with the top cover of the battery cell 700, thereby improving the accuracy of the temperature collecting contact position and thus improving the collection accuracy.

[0068] To position and install the reinforcing plate 310 within the mounting groove 110, in the embodiment of the present application, along the Z direction, one of the mounting groove 110 and the reinforcing plate 310 may be provided with a limiting protrusion 312, and the other may be provided with a limiting space 112. The limiting space 112 may be a limiting groove or a limiting hole. The limiting protrusion 312 extends into the limiting space 112, and the limiting protrusion 312 and the limiting space 112 are limitedly engaged within the plane of the bottom of the mounting groove 110 (i.e., the plane perpendicular to the Z direction). This improves the convenience of installing the reinforcing portion 310 and prevents the reinforcing plate 310 from shifting in multiple directions in the horizontal plane.

[0069] Optionally, the limiting protrusion 312 can be provided on the surface of the reinforcing plate 310 facing the wiring harness plate 100, and the limiting space 112 can be opened in the mounting groove 110. Of course, in other optional embodiments, the limiting protrusion 312 can also be provided in the mounting groove 110, and the limiting space 112 can be provided in the reinforcing plate 310.

[0070] The cross-sectional outer contour dimension of the mounting groove 110 may be larger than the cross-sectional outer contour dimension of the reinforcing plate 310. That is, along the Z direction, the projection of the reinforcing plate 310 is located within the projection of the mounting groove 110. For example, in the XY plane (i.e., the plane perpendicular to the Z direction), each edge of the reinforcing plate 310 may have a gap with the groove wall opposite thereto, and this gap may be ≤0.3 mm. This design can effectively accommodate positional deviations in the machining of the mounting groove 110, improve assembly tolerance, and thus enhance the overall assembly efficiency and reliability of the CCS component.

[0071] It should be noted that the cross section of the mounting groove 110 refers to the cross section of the mounting groove 110 perpendicular to the Z direction, and the cross section of the reinforcing plate 310 refers to the cross section of the reinforcing plate 310 perpendicular to the Z direction.

[0072] In an embodiment of the present application, the circuit board 200 may include a main body 210 and a collecting arm 220 extending from the main body 210. The collecting arm 220 is mounted on the area of ​​the reinforcing plate 310 surrounding the first through-hole 3111. The temperature collecting element 410 may be integrated on the collecting arm 220. The temperature collecting element 410 may be soldered to the signal line of the circuit board 200. The temperature collecting element 410 may be soldered to the signal line of the collecting arm 220. In this way, the temperature collecting element 410 is connected to the reinforcing plate 310 through the collecting arm 220, thereby achieving the fixation of the temperature collecting element 410.

[0073] In some embodiments, the collection arm 220 can be fixedly connected to the reinforcing plate 310 by means of heat riveting, bonding, clamping, bolting, etc., so as to press the temperature collection element 410 onto the top cover of the battery cell 700 .

[0074] In a further technical solution, the reinforcement assembly 300 may further include a pressing member 320, which may be a flat hard structure. The pressing member 320 may be provided on the surface of the collection arm 220 facing away from the reinforcement plate 310, for example, placed flat on the collection arm 220. The pressing member 320, the collection arm 220, and the reinforcement plate 310 are fixedly connected to press the collection arm 220 against the reinforcement plate 310. In this way, the connection strength between the collection arm 220 and the reinforcement plate 310 can be enhanced, thereby improving the connection strength between the temperature collection element 410 and the reinforcement plate 310. At the same time, the displacement of the collection arm 220 can be avoided, and the displacement of the collection arm due to battery cell expansion, battery cell vibration, etc. can be avoided. Optionally, the pressing member 320 may also be integrated into the surface of the collection arm 220 facing away from the reinforcement plate 310, for example, by being glued to the surface of the collection arm 220 facing away from the reinforcement plate 310, thereby improving installation convenience.

[0075] Optionally, the reinforcing plate 310 may be provided with a hot rivet column 610, and the collecting arm 220 and the pressing piece 320 may both be provided with a hot rivet hole 620. The hot rivet column 610 on the reinforcing plate 310 may pass through the hot rivet holes 620 on the collecting arm 220 and the pressing piece 320 in sequence, and the hot rivet column 610 may be deformed through the hot riveting process, so that the reinforcing plate 310, the collecting arm 220 and the pressing piece 320 are fixedly connected as one, which not only improves the connection reliability, but also increases the contact area between the pressing piece 320 and the collecting arm 220, thereby improving the strength of the collecting arm 220, avoiding the collection arm 220 from being torn due to battery cell vibration, battery cell expansion, etc., and at the same time ensuring the uniformity of force on the temperature sampling element 410, avoiding the influence of uneven force on the temperature sampling element 410 on the collection accuracy.

[0076] Specifically, the temperature collection element 410 can be arranged at one end of the collection arm 220 facing the top cover of the battery cell 700, and along the Z direction from top to bottom, the pressing member 320, the collection arm 220, the temperature collection element 410, the thermal pad 420, and the top cover of the battery cell 700 are arranged in sequence, and the collection arm 220 and the temperature collection element 410 are fixed to the reinforcing plate 310 by the pressing member 320, and the temperature collection element 410 and the thermal pad 420 pass through the first through-hole 3111 and the second through-hole 111, and abut against the top cover of the battery cell 700 through the combined action of the pressing member 320 and the thermal pad 420. The thickness of the thermal pad 420 is set as needed, as long as it can be ensured that the thermal pad 420 is in a compressed state after the pressing member 320 is fixed, so as to improve the connection reliability of the thermal pad 420 with the temperature collection element 410 and the top cover of the battery cell 700. Among them, the collection arm 220 is T-shaped as a whole, with reference to Figure 9-10 As shown, the T-shaped longitudinal portion is connected to the main body 210 of the circuit board 200, the T-shaped transverse portion is provided with a temperature sensing element 410, and heat rivet holes 620 are provided at both ends of the T-shaped transverse portion. The temperature sensing element 410 is provided in the center of the two heat rivet holes 620, which increases the contact area with the clamping member 320 and improves the uniformity of the clamping force of the clamping member 320 on the temperature sensing element 410.

[0077] The CCS assembly also includes a tab 500, which is used to be fixedly connected to the pole 720 of the battery cell 700 of the battery module. There are multiple tabs 500, and multiple tabs 500 can realize the series connection, parallel connection or series-parallel combination of multiple battery cells 700 (the specific implementation method is the existing technology and will not be repeated in this article, and this article does not limit the series-parallel connection method of multiple battery cells 700).

[0078] The bar piece 500 is arranged on the second surface of the wiring harness plate 100. The bar piece 500 can be provided with a hot rivet hole 620, and the wiring harness plate 100 can be provided with a hot rivet column 610. The hot rivet column 610 of the wiring harness plate 100 passes through the hot rivet hole 620 of the bar piece 500, and the hot rivet column 610 is deformed by the hot riveting process, so that the bar piece 500 and the wiring harness plate 100 are fixedly connected. Of course, the connection between the bar piece 500 and the wiring harness plate 100 can also be achieved by other methods such as bonding.

[0079] refer to Figure 7 As shown, at least one side edge of the reinforcing plate 310 can extend between the tab 500 and the wiring harness plate 100, and the tab 500 presses the reinforcing plate 310 into the mounting groove 110 to limit the reinforcing plate 310 in the Z direction through the tab 500.

[0080] In one embodiment, multiple tabs 500 can be arranged in the form of multiple rows (as shown in the Y direction in the figure, the Y direction is the length direction of the battery module) and multiple columns (as shown in the X direction in the figure, the X direction is the width direction of the battery module), and the opposite side edges of the reinforcing plate 310 can extend between the corresponding tabs 500 and the wiring harness plate 100. In this way, the two ends of the reinforcing plate 310 extend under the tabs 500 on both sides. When the tabs 500 are welded to the poles 720 of the battery cell 700, the position of the tabs 500 and the poles 720 of the battery cell 700 are locked together, and the reinforcing plate 310 is pressed from the Z direction, so that the reinforcing assembly 300 is installed in place and fixed firmly.

[0081] The tab 500 that applies pressure to the reinforcing plate 310 can be provided with an escape notch 510. The area of ​​the reinforcing plate 310 facing the collection arm 220, the collection arm 220, and the temperature collection element 410 can all be located within the escape notch 510. The escape notch 510 can be provided at an edge of the tab 500, such as a corner. This structure can make the CCS assembly more compact, fully utilize space, and improve space efficiency.

[0082] The second surface of the wiring harness plate 100 may be provided with a tab groove, and the tab 500 may be provided in the tab groove. A third through-hole 140 may begin to be provided at the bottom of the tab groove. The third through-hole 140 is used for the pole 720 to pass through so that the pole 720 can be fixedly connected to the tab 500. Optionally, the pole 720 and the tab 500 may be welded together.

[0083] In a further technical solution, the cross-sectional outer contour size of the third through-hole 140 may be larger than the cross-sectional outer contour size of the pole 720 used to cooperate with the third through-hole 140. That is, along the Z direction, the projection of the pole 720 is located within the projection of the third through-hole 140. For example, in the XY plane (i.e., the plane perpendicular to the Z direction), the size of each side of the third through-hole 140 may be 1-3 mm larger than the side of the pole 720 opposite thereto, for example, 1 mm, 2 mm, or 3 mm larger. This design can effectively accommodate positional deviations in the processing of the third through-hole 140, improve assembly tolerance, and thus enhance the overall assembly efficiency and reliability of the CCS assembly.

[0084] It should be noted that the cross section of the third through hole 140 refers to the cross section of the third through hole 140 perpendicular to the Z direction, and the cross section of the pole 720 refers to the cross section of the pole 720 perpendicular to the Z direction.

[0085] The tab slots include a first slot 120 and a second slot 130 spaced apart along the X-direction. The tabs 500 located within the first and second slots 120, 130 are configured to mate with different posts 720. The two posts 720 of the same battery cell 700 can be connected to the tabs 500 within the corresponding first and second slots 120, 130, respectively. The area between the first and second slots 120, 130 forms a mounting area 150, where the main body 210 of the circuit board 200 is located. At least two third through-holes 140 are located within the first and second slots 120, 130 to facilitate connection between the tabs 500 and the posts 720. The two ends of the mounting groove 110 are respectively located in the first groove 120 and the second groove 130. The middle part of the mounting groove 110 is opened in the mounting area 150. The mounting groove 110 extends along the X direction and extends from the first groove 120 to the second groove 130 along the X direction, thereby increasing the extension length of the mounting groove 110, thereby increasing the contact area between the mounting groove 110 and the reinforcing plate 310. The strength of the main body 210 of the circuit board 200 is improved by the reinforcing plate 310. At the same time, the two side edges of the reinforcing plate 310 can be extended between the bar 500 and the wiring harness plate 100, so that the area opposite to the reinforcing plate 310 and the collection arm 220, the collection arm 220 and the temperature collection element 410 can be extended into the avoidance gap 510 of the bar 500, thereby improving the compactness of the structure.

[0086] Optionally, the main body 210 may be provided with a hot rivet hole 620, and the mounting area 150 of the wiring harness plate 100 may be provided with a hot rivet column 610. The hot rivet column 610 of the mounting area 150 may pass through the hot rivet hole 620 of the main body 210, and the hot rivet column 610 may be deformed by a hot riveting process, thereby fixing the main body 210 and the wiring harness plate 100.

[0087] In the examples of this application, refer to Figure 5-7 As shown, the portion of the reinforcing plate 310 located in the mounting groove 110 is provided with a support bar 313 protruding in the direction away from the harness plate 100, and the main body 210 is supported on the support bar 313. The area opposite to the reinforcing plate 310 and the collecting arm 220 may have a boss 311, and the collecting arm 220 may be provided on the boss 311 so that the collecting arm 220 and the main body 210 are coplanar, thereby alleviating potential failure points of the circuit board 200 caused by stress differences between different planes, such as cracking or breaking of solder joints, or breaking of the collecting arm 220 and the main body 210, and enhancing the stability and reliability of the circuit connection, especially in an environment with frequent vibration or mechanical shock.

[0088] Specifically, in the Z direction, the circuit board body 210, reinforcement plate 310, and wiring harness plate 100 in the CCS assembly are stacked sequentially, thereby clamping the reinforcement plate 310 between the body 210 and the wiring harness plate 100 and, in conjunction with the mounting slot 110, restricting the position of the reinforcement plate 310 in the X, Y, and Z directions. Furthermore, a boss 31 is provided in the area of ​​the reinforcement plate 310 opposite the collection arm 220 to accommodate the temperature collection element 410 and the thermal pad 420. The portion of the reinforcement plate 310 located within the mounting slot 110 is provided with a support bar 313 that protrudes away from the wiring harness plate 100. This allows the collection arm 220 to be coplanar with the body 210. This improves the stability and reliability of the circuit connection and prevents breakage of the collection arm 220 and / or the body 210. It also enhances the strength of the reinforcement plate 310, preventing breakage due to its excessive extension and preventing the edges of the reinforcement plate from being compressed by the tabs 500 and thus buckling. In addition, the portion of the reinforcing plate 310 located in the mounting groove 110 is provided with an explosion-proof valve window to correspond to the explosion-proof valve on the top cover of the battery cell 700, and the support bars 313 are arranged on both sides of the explosion-proof valve window to ensure the strength of the reinforcing plate 310 and avoid a reduction in the strength of the reinforcing plate 310 due to the explosion-proof valve window.

[0089] Based on the above-mentioned CCS component, an embodiment of the present application further provides a battery module, which includes the above-mentioned CCS component. The battery module includes a plurality of stacked battery cells 700 (stacked along the Y direction). The CCS component is installed on the top covers of the plurality of battery cells 700. The temperature collection element 410 is in thermal contact with the top covers of the battery cells 700 to collect the temperature of the top covers of the battery cells 700 through the temperature collection element 410. Since the battery module has the above-mentioned CCS component, the beneficial effects of all battery modules brought by the CCS component can be found in the above content and will not be repeated here.

[0090] In a further technical solution, the battery cell 700 includes an insulating layer, which is attached to the top cover of the battery cell 700. The insulating layer is provided with a temperature collection window 710. The temperature collection element 410 of the CCS component and the first through-hole 3111 of the reinforcing plate 310 and the second through-hole 111 of the mounting groove 110 can face the temperature collection window 710. One end of the thermal pad 420 of the CCS component abuts against the temperature collection element 410, and the other end passes through the temperature collection window 710 and abuts against the top cover of the battery cell 700.

[0091] The cross-sectional shape of the thermal pad 420 can be substantially the same as that of the temperature sampling window 710. The outer dimensions of the cross-sectional profile of the thermal pad 420 can be smaller than those of the temperature sampling window 710. In other words, along the Z direction, the projection of the thermal pad 420 lies within the projection of the temperature sampling window 710. This design effectively accommodates positional deviations during the processing of the temperature sampling window 710, improving assembly tolerances. The thickness of the thermal pad 420 can be adjusted as needed, as long as it can elastically contact the heating element and the top cover of the battery cell 700, thereby ensuring reliable thermal contact.

[0092] Based on the above-mentioned battery modules, an embodiment of the present application also provides a battery pack, which can be used in electric vehicles. The battery pack includes multiple battery modules mentioned above, and multiple battery modules are combined to form a battery pack. Since the battery pack has the above-mentioned battery modules, the beneficial effects of the battery pack brought by the battery modules can be found in the above content and will not be repeated here.

[0093] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0094] The block diagrams of the devices, devices, equipment, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, or configured in any manner. Words such as "include," "comprise," "have," and the like are open-ended words, meaning "including but not limited to," and can be used interchangeably therewith. The words "or" and "and" used herein refer to the words "and / or" and can be used interchangeably therewith, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to," and can be used interchangeably therewith.

[0095] It should also be noted that in the apparatus, device, and method of the present application, each component or each step can be decomposed and / or recombined, and such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0096] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0097] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth" and "sixth" used in the description of the embodiments of the present application are only used to more clearly illustrate the technical solutions and cannot be used to limit the scope of protection of the present application.

[0098] The above description has been provided for the purpose of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A CCS assembly for a battery module, wherein the battery module comprises a plurality of stacked battery cells (700), characterized in that: The CCS components include: A wiring harness plate (100) comprising a first surface and a second surface facing each other, the wiring harness plate (100) being used to be mounted on top covers of the plurality of battery cells (700) along a Z direction, the first surface facing the top covers of the plurality of battery cells (700); A circuit board (200) is mounted on the second surface of the wiring harness board (100) along the Z direction; A reinforcement assembly (300) is fixedly mounted on the wiring harness plate (100), wherein the reinforcement assembly (300) includes a reinforcement plate (310); A temperature collecting element (410) is connected to the reinforcing plate (310) and electrically connected to the circuit board (200). The temperature collecting element (410) is used for thermally contacting the top cover of the battery cell (700) to collect the temperature of the top cover of the battery cell (700).

2. The CCS assembly according to claim 1, characterized in that The wiring harness plate (100) is an insulating plastic-blister plate, and the thickness of the wiring harness plate (100) is 0.4 mm to 0.6 mm.

3. The CCS assembly according to claim 1, characterized in that The second surface of the wiring harness plate (100) has a mounting groove (110) that is recessed toward the first surface along the Z direction, the reinforcing plate (310) is positioned and mounted in the mounting groove (110), the reinforcing plate (310) is provided with a first through hole (3111), and the bottom of the mounting groove (110) is provided with a second through hole (111); The CCS assembly further comprises a thermal pad (420), one end of which abuts against the temperature collecting element (410), and the other end of which passes through the first through-hole (3111) and the second through-hole (111) and is used for abutting and connecting with the top cover of the battery cell (700).

4. The CCS assembly according to claim 3, characterized in that Along the Z direction, one of the mounting groove (110) and the reinforcing plate (310) is provided with a limiting protrusion (312), and the other is provided with a limiting space (112), the limiting protrusion (312) extends into the limiting space (112), and the limiting protrusion (312) and the limiting space (112) are limitedly matched within the plane where the bottom of the mounting groove (110) is located.

5. The CCS assembly according to claim 3, characterized in that The circuit board (200) comprises a body (210) and a collection arm (220) extending from the body (210); the collection arm (220) is mounted on an area of ​​the reinforcing plate (310) surrounding the first through-hole (3111) and is fixedly connected to the reinforcing plate (310); and the temperature collection element (410) is provided on the collection arm (220); The reinforcing assembly (300) further comprises a pressing member (320), wherein the pressing member (320) is provided on a surface of the collecting arm (220) facing away from the reinforcing plate (310), and the pressing member (320), the collecting arm (220) and the reinforcing plate (310) are fixedly connected to press the collecting arm (220) onto the reinforcing plate (310).

6. The CCS assembly according to claim 5, characterized in that The CCS assembly further includes a tab (500), the tab (500) being provided on the second surface of the wiring harness plate (100), the tab (500) being used for fixedly connecting to the pole (720) of the battery cell (700) of the battery module; At least one side edge of the reinforcing plate (310) extends between the tab (500) and the wiring harness plate (100), and the tab (500) presses the reinforcing plate (310) tightly into the mounting groove (110).

7. The CCS assembly according to claim 6, characterized in that The bar (500) that applies pressure to the reinforcing plate (310) is provided with an avoidance gap (510), and the area where the reinforcing plate (310) and the collecting arm (220) are opposite, the collecting arm (220) and the temperature collecting element (410) are all located in the avoidance gap (510).

8. The CCS assembly according to claim 6, characterized in that The second surface of the wiring harness plate (100) is provided with a bar plate groove, the bar plate (500) is provided in the bar plate groove, and a third through hole (140) is provided at the bottom of the bar plate groove, the third through hole (140) is used for the pole (720) to pass through, and the bar plate (500) is fixedly connected; The outer contour size of the cross section of the third through hole (140) is larger than the outer contour size of the cross section of the pole (720) matched therewith; There are multiple tabs (500), and the tab slots include a first slot (120) and a second slot (130). The tabs (500) located in the first slot (120) and the second slot (130) are respectively used to cooperate with different poles (720). The area between the first slot (120) and the second slot (130) forms an installation area (150), and the body (210) of the circuit board (200) is arranged in the installation area (150). Both ends of the installation groove (110) are respectively located in the first groove (120) and the second groove (130), and the middle portion of the installation groove (110) is opened in the installation area (150).

9. The CCS assembly according to claim 8, characterized in that The portion of the reinforcing plate (310) located in the mounting groove (110) is provided with a support bar (313) protruding in a direction away from the wiring harness plate (100), the main body (210) is supported on the support bar (313), the area of ​​the reinforcing plate (310) opposite to the collecting arm (220) is provided with a boss (311), and the collecting arm (220) is provided on the boss (311) so that the collecting arm (220) and the main body (210) are coplanar.

10. A battery module, characterized in that: The CCS assembly comprises the CCS assembly according to any one of claims 1 to 9, wherein the battery module comprises a plurality of stacked battery cells (700), the CCS assembly is mounted on the top covers of the plurality of battery cells (700) along the Z direction, and the temperature collecting element (410) is in thermal contact with the top covers of the battery cells (700); The battery cell (700) comprises an insulating layer, the insulating layer being attached to the top cover of the battery cell (700), the insulating layer being provided with a temperature collection window (710), the CCS component comprising a thermal pad (420), one end of the thermal pad (420) being in contact with the temperature collection element (410), and the other end of the thermal pad (420) passing through the temperature collection window (710) and in contact with the top cover of the battery cell (700).

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