Cells contact system (CCS) assembly and battery pack

Abstract

The present application relates to the technical field of battery information collection modules, and in particular to a cells contact system (CCS) assembly and a battery pack. The CCS assembly comprises a signal collection board, an insulated mounting support, a heat-conducting member and a temperature sensor, wherein the insulated mounting support is fixed on a surface of a battery module, the battery module comprises a plurality of battery cells which are arranged in sequence, and the insulated mounting support comprises a mounting groove; the heat-conducting member is mounted in the mounting groove, the bottom wall of the mounting groove comprises openings, the openings face the plurality of battery cells, and the heat-conducting member comes into contact with surfaces of the plurality of battery cells by means of the openings; the temperature sensor collects temperature information of the heat-conducting member; and the signal collection board is fixed to the side of the insulated mounting support that faces away from the battery module, the signal collection board is connected to the temperature sensor, and the signal collection board is used for receiving the temperature information collected by the temperature sensor and transmitting the temperature information to a controller. The CCS assembly performs measurement on a plurality of battery cells by means of one temperature sensor, thus reducing the number of temperature sensors and optimizing the structure.

Description

An integrated busbar CCS component and battery pack

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office of China on January 23, 2024, with application number 202410101394.3 and application name “An integrated busbar CCS assembly and battery pack”, the entire contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the technical field of battery information acquisition modules, and in particular to an integrated busbar CCS assembly and a battery pack. Background Art

[0004] With the development and widespread application of new energy technologies, battery packs, as a crucial component of these technologies, have become a crucial issue in ensuring their safety during use. In existing technologies, integrated busbar (cell contact system) assemblies (CCS) are typically used to collect battery voltage and temperature. This information is then transmitted to a battery monitoring unit (BMU) to monitor the battery voltage and temperature and mitigate the risk of battery fires.

[0005] However, a battery includes multiple battery cells. In order to detect the temperature of each battery cell, the CCS component in the prior art includes multiple temperature sensors, each temperature sensor is used to detect the temperature of one or two battery cells, which increases the complexity of the battery management system and also increases the cost of the battery management system. Summary of the Invention

[0006] The embodiments of the present application provide an integrated busbar CCS assembly and a battery pack. The integrated busbar assembly can reduce the number of temperature sensors, simplify the structure of the integrated busbar assembly, and thus optimize the structure of the battery management system and reduce costs.

[0007] In a first aspect, the present application provides an integrated busbar assembly, comprising a signal acquisition board, an insulating mounting bracket, a thermal conductor, and a temperature sensor; the insulating mounting bracket being fixed to the surface of a battery module, the battery module comprising a plurality of sequentially arranged battery cells; the insulating mounting bracket comprising a mounting slot extending along the arrangement direction of the plurality of battery cells; the thermal conductor being mounted in the mounting slot, the bottom wall of the mounting slot comprising an opening facing the plurality of battery cells, the thermal conductor being in contact with the surfaces of the plurality of battery cells through the opening for heat conduction, the temperature sensor being in contact with the surface of the thermal conductor to collect temperature information of the thermal conductor, the signal acquisition board being fixed to a side of the insulating mounting bracket facing away from the battery module, the signal acquisition board being electrically connected to the temperature sensor, the signal acquisition board being configured to receive temperature information collected by the temperature sensor and transmit the temperature information collected by the temperature sensor to a controller; the thermal conductor being fixed to the mounting slot, the thermal conductor being in contact with the battery cells through the opening in the bottom wall of the mounting slot, and the temperature generated by each battery cell being able to be collected by the thermal conductor. When any one or more of the multiple battery cells fails, it can be understood that no matter which battery cell fails, when a temperature anomaly occurs, the temperature of the heat conductor will change. The temperature sensor can collect the temperature of the heat conductor in real time and transmit this temperature information to the controller via the signal acquisition board to prevent the battery cell temperature from overheating and causing danger. In addition, in this method, a single temperature sensor can detect temperature anomalies in any of the multiple battery cells, thereby reducing the number of temperature sensors, simplifying the structure of the integrated busbar assembly, and optimizing the structure of the battery management system, reducing costs.

[0008] In one embodiment, the integrated busbar assembly further includes a plurality of first thermal pads, the openings of which are a plurality of thermal holes, the opening of each thermal hole facing at least one battery cell, and each first thermal pad being placed one-to-one in the plurality of thermal holes, one end of each first thermal pad being in contact with the thermal conductor, and the other end of each first thermal pad being in contact with at least one battery cell. The openings of the thermal holes facing the plurality of battery cells can ensure that after the thermal conductor is set in the mounting groove, the thermal conductor can contact the plurality of battery cells through the first thermal pads set in the plurality of thermal holes. The provision of the first thermal pad can ensure that the thermal conductor is in more stable contact with the surfaces of the plurality of battery cells.

[0009] In one embodiment, the plurality of thermal vias are provided in a one-to-one correspondence with the plurality of battery cells, with one end of each first thermal pad contacting the heat conductor, and the other end of each first thermal pad contacting a corresponding battery cell. Alternatively, some of the plurality of thermal vias correspond to two battery cells, in which case the thermal vias may be located between the two battery cells.

[0010] In one embodiment, the integrated busbar assembly further includes a plurality of second thermal pads, each having openings formed as slots extending in the same direction as the mounting slots and oriented toward the plurality of battery cells. The second thermal pads are disposed within the slots, with one end of the second thermal pads contacting the thermally conductive member, and the other end of the second thermal pads contacting the surface of each of the plurality of battery cells. The slots can increase the contact area between the thermally conductive member and the second thermal pads, thereby increasing the contact area between the thermally conductive member and each battery cell.

[0011] In one embodiment, the integrated busbar assembly further includes a stopper mounted on the insulating mounting bracket and configured to secure the heat conductor. The stopper can improve the stability of the heat conductor when mounted in the mounting slot.

[0012] The limiting member may have various structural forms, for example, the limiting member may include a plurality of insulating screws, a plurality of buckles or a hot pressing film.

[0013] In one embodiment, the retaining members are two rows of insulating screws. Specifically, the integrated busbar assembly further comprises two rows of insulating screws, each row comprising multiple insulating screws. The two rows of insulating screws are arranged on either side of the mounting slot. The screw shafts of the insulating screws are mounted on insulating mounting brackets, and the nuts of the insulating screws abut against the end of the thermal conductor facing away from the bottom wall of the mounting slot. In this manner, the insulating screws secure the thermal conductor in the mounting slot to prevent movement. In one embodiment, the multiple insulating screws can be arranged symmetrically on either side of the mounting slot along the direction in which the mounting slot extends.

[0014] In one embodiment, the limiting member is two rows of clips, that is, the integrated busbar assembly also includes two rows of clips, each row of clips includes a plurality of clips, and the two rows of clips are arranged on both sides of the mounting groove, one end of the clip is connected to the insulating mounting bracket, and the other end of the clip abuts against the side of the bottom wall of the heat conductor away from the mounting groove. The clip fixes the heat conductor in the mounting groove, improves the stability of the heat conductor installed in the mounting groove, and prevents the heat conductor from moving. The clip may include a connecting section and a snap-fit ​​section, one end of the connecting section is connected to the insulating mounting bracket, and the other end of the connecting section is connected to the snap-fit ​​section. In the projection of the insulating mounting bracket, the snap-fit ​​section and the mounting groove at least partially overlap to ensure that the snap-fit ​​section can abut against the heat conductor to prevent the heat conductor from moving. In one embodiment, a plurality of clips may be symmetrically arranged on both sides of the mounting groove along the extension direction of the mounting groove.

[0015] In one embodiment, the retaining member is a hot-pressed film, i.e., the integrated busbar assembly further includes the hot-pressed film, which is secured to the insulating mounting bracket, and the thermal conductor is secured to the mounting slot via the hot-pressed film. It can be understood that the hot-pressed film is connected to the insulating mounting brackets on both sides of the mounting slot, and the hot-pressed film covers the mounting slot, preventing the thermal conductor in the mounting slot from moving. The retaining member may include multiple hot-pressed films, which are sequentially spaced along the mounting slot to secure the thermal conductor in the mounting slot.

[0016] In the above embodiments, the heat conducting element may be a heat pipe, or the material of the heat conducting element may be graphene. The heat conducting element may also be other heat conducting materials.

[0017] In one embodiment, the integrated busbar assembly further includes two rows of conductive bars, which are fixed to a side of the insulating mounting bracket facing away from the battery module. The two rows of conductive bars extend in the same direction as the signal acquisition board. The two rows of conductive bars are located on either side of the signal acquisition board, which is electrically connected to the two rows of conductive bars. The signal acquisition board is configured to collect current and voltage information from the two rows of conductive bars and transmit this information to a controller. The conductive bars are configured to electrically connect the positive and negative electrodes of two adjacent battery cells. Positioning the signal acquisition board between the two rows of conductive bars can simplify the connection between the signal acquisition board and the two rows of conductive bars.

[0018] In one embodiment, the insulating mounting bracket includes two rows of avoidance holes, each row of avoidance holes corresponding to a row of conductive bars, and the conductive bars are electrically connected to the battery cells through the avoidance holes, thereby improving the convenience of connecting the integrated busbar assembly to the battery pack.

[0019] On the second aspect, the present application also provides a battery pack, including a battery module and an integrated busbar assembly in any technical solution of the first aspect, the battery module including a plurality of battery cells arranged in sequence, the integrated busbar assembly being fixed to the pole side of the plurality of battery cells, the heat conductor being attached to the plurality of battery cells through an opening, and the CCS assembly being used to detect the temperature of the plurality of battery cells. When one or more of the plurality of battery cells fails and temperature anomalies occur, the temperature of the heat conductor will also change with the change in the temperature of the battery cells. The temperature sensor provided on the heat conductor can collect the temperature on the heat conductor in real time, and transmit the collected temperature information to the controller through the signal acquisition board, thereby being able to promptly detect abnormalities in the battery pack and improve the safety of the battery pack operation. Moreover, only one temperature sensor is needed to detect the battery pack, which can optimize the structural layout and reduce costs.

[0020] In the third aspect, the present application also provides an energy storage system, which includes a power converter and a battery pack in any technical solution of the second aspect; the power converter is used to convert the voltage output by multiple battery packs into power and output it to the power grid or load, or to convert the voltage output by an external power supply into power and output it to the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

[0022] FIG2 is a schematic structural diagram of an integrated busbar assembly provided in an embodiment of the present application;

[0023] FIG3 is an exploded view of an integrated busbar assembly provided in an embodiment of the present application;

[0024] FIG4 is another exploded view of the integrated busbar assembly provided in an embodiment of the present application;

[0025] FIG5 is a schematic structural diagram of an insulating mounting bracket in an integrated busbar assembly provided in an embodiment of the present application;

[0026] FIG6 is a schematic structural diagram of a signal acquisition board in an integrated busbar assembly provided in an embodiment of the present application;

[0027] FIG7 is a schematic diagram of a partial structure of electrical connections between a signal acquisition board and a temperature sensor in an integrated busbar assembly provided in an embodiment of the present application;

[0028] FIG8 is a schematic diagram of a partial structure in which a limiting member is disposed on an insulating mounting bracket in an integrated busbar assembly provided in an embodiment of the present application;

[0029] FIG9 is a schematic diagram of another partial structure of an integrated busbar assembly provided in an embodiment of the present application in which a limiting member is disposed on an insulating mounting bracket;

[0030] FIG10 is a schematic diagram of another partial structure of an integrated busbar assembly provided in an embodiment of the present application in which a limiting member is disposed on an insulating mounting bracket;

[0031] 11a and 11b are schematic diagrams of the connection structure of an energy storage system provided in an embodiment of the present application.

[0032] Figure markings: 10-battery pack; 11-fixing frame; 110-first bracket; 111-second bracket; 112-connecting plate; 12-battery module; 120-battery cell; 20-integrated busbar assembly; 21-signal acquisition board; 210-pin; 211-electrical connection part; 22-conductive bar; 220-positioning hole; 23-insulating mounting bracket; 230-mounting groove; 231-thermal hole; 232-avoidance hole; 233-positioning column; 234-slot; 24-thermal conductor; 25-temperature sensor; 26-first thermal pad; 27-limiting member; 270-insulating screw; 271-clip; 2710-connecting section; 2711-clamping section; 272-hot pressing film; 28-second thermal pad. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of this application clearer, this application will be further described in detail below with reference to the accompanying drawings.

[0034] Electric vehicles or other stationary energy storage systems all include a battery management system, which includes a battery monitoring unit (BMU) and a battery module. The BMU capacitor is used to monitor the operating status of the battery module. In the prior art, a battery module includes multiple battery cells. The BMU is generally electrically connected to the multiple battery cells via multiple temperature sensors to collect temperature information of different unused battery cells, thereby testing different battery cells and reducing the possibility of battery hazards. Although the multiple temperature sensors in this method can detect abnormalities in battery cells, the large number of temperature sensors makes the battery management system complex and expensive.

[0035] The terms used in the following embodiments are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the specification and appended claims of this application, the singular expressions "a", "an", "said", "above", "the", and "this" are intended to also include expressions such as "one or more", unless the context clearly indicates otherwise.

[0036] References to "one embodiment" or "some embodiments" in this specification mean that a particular feature, structure, or characteristic described in conjunction with that embodiment is included in one or more embodiments of the present application. Thus, phrases such as "in one embodiment," "in some embodiments," "in other embodiments," and "in yet other embodiments" appearing in various places in this specification do not necessarily refer to the same embodiment, but rather mean "one or more but not all embodiments," unless otherwise specifically emphasized. The terms "including," "comprising," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0037] Figure 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application. Referring to Figure 1, the battery pack 10 includes a fixing frame 11, a battery module 12 and an integrated busbar assembly 20. The battery module 12 includes a plurality of battery cells 120 arranged in sequence along a first direction X, and the fixing frame 11 is used to fix the plurality of battery cells 120. Each battery cell 120 includes a positive electrode column and a negative electrode column, and the positive electrode column and the negative electrode column included in each battery cell 120 are located on the same side of the battery cell 120. The positive electrode column and the negative electrode column on each battery cell 120 are arranged along a second direction Y, and there is a gap between the positive electrode column and the negative electrode column on each battery cell 120. The integrated busbar assembly 20 is fixed to the electrode side of the plurality of battery cells 120, and the integrated busbar assembly 20 is used to electrically connect to the positive electrode column and the negative electrode column of the plurality of battery cells 120. Among them, the integrated busbar assembly 20 can collect the temperature of each battery cell 120 and send the detected temperature to the battery monitoring unit. The battery monitoring unit can be understood as a controller. The battery monitoring unit can determine whether the battery module 12 is overheated based on the temperature information detected by the integrated busbar assembly 20 to prevent the battery module 12 from overheating and causing hazards such as fire.

[0038] In one embodiment, the fixing frame 11 includes a storage space, and a plurality of battery cells 120 are arranged in sequence in the storage space along a first direction. The shape of the fixing frame 11 may be circular, rectangular, diamond-shaped, etc. The shape of the battery cell 120 may be a long strip or cylindrical, etc. The fixing frame 11 includes a first bracket 110, a second bracket 111, and a plurality of connecting plates 112. The plurality of connecting plates 112 connect the first bracket 110 and the second bracket 111 to form a storage space for accommodating a plurality of battery cells 120. A fireproof cotton is provided between the first bracket 110 and a battery cell 120 at one end along the first direction X, and a fireproof cotton may also be provided between the second bracket 111 and a battery cell 120 at the other end. In some other embodiments, the first bracket 110 and the second bracket 111 may each include at least four side panels, and the at least four side panels form a accommodating cavity. The first bracket 110 and the second bracket 111 are arranged along the height direction of the battery cell. The accommodating cavity of the first bracket 110 and the accommodating cavity of the second bracket 111 may be interconnected for fixing multiple battery cells.

[0039] Figure 2 is a schematic structural diagram of an integrated busbar assembly provided in an embodiment of the present application, and Figure 3 is an exploded view of an integrated busbar assembly provided in an embodiment of the present application. Figure 3 is an exploded view of Figure 2. Referring to Figures 1, 2, and 3, in one embodiment, the integrated busbar assembly 20 includes a signal acquisition board 21, an insulating mounting bracket 23, a heat conductor 24, and a temperature sensor 25. The signal acquisition board 21 is any one of an FPC, a PCB, or an FFC, and the heat conductor 24 can have various structural forms, such as: the heat conductor 24 is a heat pipe, or the material of the heat conductor 24 is a graphene material. The heat conductor 24 can also have other structural forms, which are not listed here. The insulating mounting bracket 23 is fixed to the surface of the battery module 12. Specifically, the battery module 12 includes a plurality of battery cells 120 arranged in sequence along a first direction X. The insulating mounting bracket 23 is fixed to the pole side of the plurality of battery cells 120. The insulating mounting bracket 23 includes a mounting slot 230 that extends along the arrangement direction of the plurality of battery cells 120. It can be understood that the mounting slot 230 extends along the first direction X. A thermal conductor 24 is mounted in the mounting slot 230. The bottom wall of the mounting slot 230 includes an opening that faces the plurality of battery cells 120. The thermal conductor 24 contacts the surfaces of the plurality of battery cells 120 through the opening for heat conduction. A temperature sensor 25 contacts the surface of the thermal conductor 24 to collect temperature information from the thermal conductor 24. The signal acquisition board 21 is fixed to the side of the insulating mounting bracket 23 facing away from the battery module 12. The signal acquisition board 21 is electrically connected to the temperature sensor 25 and is configured to receive temperature information collected by the temperature sensor 25 and transmit the collected temperature information to the controller. In this embodiment, the controller can determine whether multiple battery cells 120 are overheating based on signals transmitted by the signal acquisition board 21, thereby preventing the multiple battery cells 120 from overheating and causing hazards such as fire. The thermal conductor 24 contacts the surfaces of the multiple battery cells 120, and the heat generated by each battery cell 120 is transferred to the thermal conductor 24. When any one or more of the multiple battery cells 120 malfunction and experience temperature abnormalities, the temperature of the thermal conductor 24 will also change with the temperature of the battery cells 120. The temperature sensor 25 disposed on the thermal conductor 24 can collect the temperature of the thermal conductor 24 in real time. It can be understood that a temperature sensor 25 in contact with the surface of the thermal conductor 24 can collect the temperatures of multiple battery cells 120 in real time and transmit the collected signals to the controller via the signal acquisition board 21, thereby enabling timely detection of abnormalities in the battery module 12 and preventing the battery module 12 from overheating and causing danger.In this manner, only a temperature sensor 25 electrically connected to the signal acquisition board 21 needs to be provided on the heat conductor 24. One temperature sensor 25 can detect temperature anomalies of multiple battery cells 120 through the heat conductor 24, thereby reducing the number of temperature sensors 25 and the lines connected to the temperature sensors 25, simplifying the structure of the integrated busbar assembly 20, reducing the cost of the integrated busbar assembly 20, and thereby reducing the cost of the entire battery pack 10.

[0040] In one embodiment, the integrated busbar assembly 20 further includes two rows of conductive bars 22, which are fixed to the side of the insulating mounting bracket 23 facing away from the battery module 12. The extension direction of the two rows of conductive bars 22 is the same as the extension direction of the signal acquisition board 21. The two rows of conductive bars 22 are located on both sides of the signal acquisition board 21. The signal acquisition board 21 is electrically connected to the two rows of conductive bars 22. The signal acquisition board 21 is used to collect current and voltage information from the two rows of conductive bars 22 and send the current and voltage information of the two rows of conductive bars 22 to the controller. Each row of conductive bars 22 is adjacent to the signal acquisition board along the second direction Y, and there is a gap. Each row of conductive bars 22 includes a plurality of conductive bars 22, which are arranged in sequence along the first direction X, and there is a gap between two adjacent conductive bars 22. Each conductive bar 22 is an aluminum bar. One row of conductive bars 22 is used to electrically connect the positive and negative electrode posts on two adjacent battery cells 120 along the first direction X, thereby connecting the two adjacent battery cells 120 in series. Another row of conductive bars 22 electrically connects the positive and negative electrode posts on two adjacent battery cells 120 along the first direction X, thereby connecting the two adjacent battery cells 120 in series. The signal acquisition board 21 is electrically connected to each of the two rows of conductive bars 22. Furthermore, one end of one of the conductive bars 22 located at the end along the first direction X extends to the outside of the battery module 12. The portions of the two rows of conductive bars 22 that extend to the outside of the battery pack 10 are located on both sides of the battery module 12 along the first direction.

[0041] Continuing with Figure 3 , the insulating mounting bracket 23 includes two rows of positioning posts 233 arranged along the second direction Y with a gap between the two rows. Each row of positioning posts 233 includes multiple positioning posts 233 arranged along the first direction X, with a gap between two adjacent positioning posts 233. Each conductive bar 22 includes at least one positioning hole 220, with at least one positioning hole 220 corresponding to one positioning post 233. The positioning post 233 passes through the positioning hole 220, securing the conductive bar 22 to the insulating mounting bracket 23.

[0042] Continuing with reference to Figures 1, 2, and 3, in one embodiment, the integrated busbar assembly 20 further includes a plurality of first thermal pads 26, each opening being a plurality of thermal holes 231. The plurality of thermal holes 231 are arranged along a first direction X, with the opening of each thermal hole 231 facing at least one battery cell 120. The plurality of first thermal pads 26 are placed one-to-one within the plurality of thermal holes 231, with one end of each first thermal pad 26 contacting the thermally conductive member 24, and the other end of each first thermal pad 26 contacting at least one battery cell 120. The provision of the first thermal pads 26 can make the contact between the thermally conductive member 24 and the plurality of battery cells 120 more stable, allowing the temperature of the battery cells 120 to be transferred to the thermally conductive member 24 in a more stable manner. When the integrated busbar assembly 20 includes a plurality of first thermal pads 26, the heat generated by the battery cells 120 can be transferred to the thermally conductive member 24 via the first thermal pads 26. When any one or more of the multiple battery cells 120 fail and temperature abnormalities occur, the temperature of the first thermal pad 26 will change with the change in the temperature of the battery cell 120. Therefore, the temperature of the thermal conductor 24 will also change with the change in the temperature of the battery cell 120. The temperature sensor 25 provided on the thermal conductor 24 can collect the temperature on the thermal conductor 24 in real time and transmit the collected temperature to the controller through the signal acquisition board 21. The controller can monitor the battery module 12 based on the temperature information detected by the temperature sensor 25 to prevent the occurrence of danger.

[0043] In one embodiment, five thermal vias correspond to five battery cells, that is, each thermal via 231 corresponds to a battery cell 120. In this case, one end of a first thermal pad 26 contacts one battery cell 120, and the other end of a first thermal pad 26 contacts the heat conducting member 24 through a thermal via 231. In some other embodiments, at least one of the plurality of thermal vias 231 may correspond to two battery cells. In this case, as the length of a thermal via 231 increases along the first direction X, the length of the first thermal pad 26 also increases along the first direction X, so that a first thermal pad 26 disposed in a thermal via 231 can contact two battery cells 120.

[0044] It's worth noting that when each thermal via 231 corresponds to a battery cell 120, the line connecting the centers of the multiple thermal vias 231 can be a curve, a broken line, or an inclined straight line. In this case, the thermal conductive member 24 can be curved, broken, or straight. Similarly, the shape of the mounting slot 230 will also change accordingly.

[0045] FIG4 is another exploded view of the integrated busbar assembly provided in an embodiment of the present application. FIG4 is an exploded view of FIG2. Referring to FIG1, FIG2 and FIG4, in one embodiment, the integrated busbar assembly 20 further includes a plurality of second thermal pads 28, the openings of which are slots 234. The slots 234 extend in the same direction as the mounting slots 230, and the openings of the slots face the plurality of battery cells 120. The second thermal pads 28 are disposed within the slots 234, one end of the second thermal pad 28 contacts the heat conducting member 24, and the other end of the second thermal pad 28 contacts the surface of each of the plurality of battery cells 120. In this manner, the length of the slots 234 is less than the length of the mounting slots 230, that is, the length of the slots 234 is less than the length of the bottom wall of the mounting slots 230, and the openings of the slots 234 face the top surfaces of the plurality of battery cells 120. It can be understood that the openings of the slots 234 face the side of the plurality of battery cells 120 having the positive and negative poles. Since the second thermal pad 28 is in contact with the top surface of each battery cell 120, the temperature of the second thermal pad 28 changes with the temperature of the top surface of each battery cell 120. The second thermal pad 28 transfers the temperature to the thermal conductive member 24. The temperature sensor 25 in contact with the surface of the thermal conductive member 24 can collect temperature information of the thermal conductive member 24 and send the information to the controller through the signal acquisition board 21 to monitor multiple battery cells 120.

[0046] FIG5 is a schematic diagram of the structure of the insulating mounting bracket in the integrated busbar assembly provided in an embodiment of the present application. Referring to FIG2 to FIG5, in one embodiment, the insulating mounting bracket 23 includes two rows of avoidance holes 232, the two rows of avoidance holes 232 being adjacent to each other along the second direction Y with a gap therebetween, and each row of avoidance holes 232 includes a plurality of avoidance holes 232 spaced apart along the first direction X. Each row of avoidance holes 232 corresponds to a row of conductive bars 22, wherein one row of conductive bars 22 is electrically connected to the positive and negative poles of a plurality of battery cells through a row of avoidance holes 232, and another row of conductive bars 22 is electrically connected to the positive and negative poles of a plurality of battery cells through another row of avoidance holes 232.

[0047] Figure 6 is a schematic structural diagram of the signal acquisition board in the integrated busbar assembly provided in an embodiment of the present application. Referring to Figures 3 and 6, in one embodiment, the signal acquisition board 21 includes a plurality of pins 210, and the plurality of pins 210 are arranged on both sides of the signal acquisition board 21. The number of pins 210 on each side of the signal acquisition board 21 is the same as the number of conductive bars 22 included in a row of conductive bars, and each pin 210 is electrically connected to a conductive bar 22. Figure 7 is a schematic partial structural diagram of the electrical connection between the signal acquisition board and the temperature sensor in the integrated busbar assembly provided in an embodiment of the present application. Referring to Figures 6 and 7, the signal acquisition board 21 also includes an electrical connection portion 211, and the electrical connection portion 211 is electrically connected to the temperature sensor. Among them, the electrical connection portion 211 is connected to the temperature sensor 25 by welding or by a puncture and crimping process, and the electrical connection portion 211 is also fixedly connected to the heat conductor by dispensing glue.

[0048] In the above embodiment, the number of electrical connection parts 211 can also be two, and the number of temperature sensors 25 can also be two. Both temperature sensors 25 are in contact with the heat conductor 24. Both temperature sensors 25 can detect the temperature of multiple battery cells. When any temperature sensor 25 is damaged or abnormal, it will not affect the detection of multiple battery cells, which can improve the safety of the battery module operation.

[0049] In one embodiment, the integrated busbar assembly also includes a limiter, which is installed on the side of the insulating mounting bracket facing away from the battery module. The limiter can be used to fix the heat conductor arranged in the mounting groove to prevent the battery module from moving out of the mounting groove due to vibration of the heat conductor, thereby improving the stability of the battery module.

[0050] The structure of the limiting member can be in various forms. Specifically, the limiting member can be an insulating screw, a buckle or a hot pressing film, etc. The limiting member can be an insulating screw, a buckle or a hot pressing film.

[0051] FIG8 is a schematic diagram of a partial structure of an integrated busbar assembly provided in an embodiment of the present application in which a limiter is arranged on an insulating mounting bracket. Referring to FIG5 and FIG8 , in one embodiment, the limiter 27 includes two rows of insulating screws 270, that is, the integrated busbar assembly includes two rows of insulating screws 270, and the two rows of insulating screws 270 are arranged on both sides of the mounting groove. The screw rods of the insulating screws 270 are connected to the insulating bracket 23, and the nuts of the insulating screws 270 are used to abut against one end of the heat conductor 24 away from the bottom wall of the mounting groove 230. The insulating screws 270 fix the heat conductor 24 in the mounting groove 230 to prevent the heat conductor 24 from moving. Each row of insulating screws 270 includes a plurality of insulating screws 270, and the plurality of insulating screws 270 arranged on both sides of the mounting groove 230 can be symmetrically arranged, or the plurality of insulating screws 270 arranged on both sides of the mounting groove 230 can be partially symmetrical.

[0052] Figure 9 is a schematic diagram of another partial structure of an integrated busbar assembly provided in an embodiment of the present application, in which a retaining member is disposed on an insulating mounting bracket. Referring to Figures 5 and 9, in one embodiment, the retaining member 27 includes two rows of clips 271, i.e., the integrated busbar assembly includes two rows of clips 271, which are arranged on either side of the mounting slot 230. One end of the clip 271 is connected to the side of the insulating mounting bracket 23 facing away from the battery module, and the other end of the clip 271 is used to abut against the end of the thermal conductor 24 facing away from the bottom wall of the mounting slot 230. The clip 271 includes a connecting section 2710 and a snap-on section 2711. One end of the connecting section 2710 is connected to the side of the insulating mounting bracket 23 facing away from the battery module, and the other end of the connecting section 2710 is connected to the snap-on section 2711. When projected onto the insulating mounting bracket 23, the snap-on section 2711 at least partially overlaps with the mounting slot 230, ensuring that the snap-on section 2711 can abut against the thermal conductor 24 and prevent movement of the thermal conductor 24. Each row of clips 271 includes multiple clips, and the multiple clips 271 on either side of the mounting slot 230 can be symmetrically arranged, or partially symmetrically arranged.

[0053] It is worth mentioning that the cross-sectional shape of the snap-in section 2711 can be a triangle, rectangle, diamond or semicircle, etc., as long as the snap-in section 2711 can at least partially overlap with the mounting groove in the projection of the insulating mounting bracket 23, so that the heat conductor 24 does not move in the thickness direction of the insulating mounting bracket 23.

[0054] FIG10 is another partial structural schematic diagram of an integrated busbar assembly provided in an embodiment of the present application in which a limiter is arranged on an insulating mounting bracket. Referring to FIG5 and FIG10 , in one embodiment, the limiter 27 includes a hot pressing film 272, which is fixed to the side of the insulating mounting bracket 23 facing away from the battery module. In the projection of the insulating mounting bracket 23, the hot pressing film 272 covers at least a portion of the mounting groove 230. It can be understood that the hot pressing film 272 is connected to the insulating mounting bracket 23 on both sides of the mounting groove 230, and the hot pressing film 272 covers the mounting groove 230 to fix the heat conductor 24 in the mounting groove 230 and prevent the heat conductor 24 in the mounting groove 230 from moving. There can be multiple hot pressing films 272, and the multiple hot pressing films 272 are arranged in sequence along the extension direction of the mounting groove 230, and there is a gap between two adjacent hot pressing films 272.

[0055] In the above embodiment, the thermal conductive member 24 may include multiple protrusions, each corresponding to the multiple thermal holes 231. The multiple protrusions are disposed in the thermal holes 231, and each protrusion contacts the surface of a battery cell. Each protrusion can collect the temperature of multiple battery cells and transmit it through the temperature sensor 25 provided on the thermal conductive member 24. In this case, the multiple protrusions can be regarded as the first thermal pad.

[0056] In one embodiment, the thermal conductive member 24 may include a protrusion, one protrusion corresponding to the slot. The protrusion passes through the slot and contacts the surfaces of multiple battery cells to collect the temperature of each battery cell and transmit it through the temperature sensor 25 provided on the thermal conductive member 24. In this case, the multiple protrusions can be regarded as a second thermal pad.

[0057] An embodiment of the present application provides an energy storage system. Figures 11a and 11b are schematic diagrams of the connection structure of an energy storage system. Referring to Figures 11a and 11b, the energy storage system includes the battery pack and a power converter of the present application. The power converter is used to convert the voltage output by the battery pack into power and output it to the power grid or external load, or the power converter is used to convert the voltage output by the external power supply into power and output it to the battery pack. The battery pack can be connected to a photovoltaic module, and the photovoltaic module is used to charge the battery pack.

[0058] It is worth mentioning that the battery pack provided in the embodiments of the present application can also be used in electric vehicles.

[0059] Obviously, those skilled in the art may make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include these modifications and variations.

Claims

1. An integrated busbar CCS component, characterized in that The CCS assembly includes a signal acquisition board, an insulating mounting bracket, a heat conducting member and a temperature sensor; The insulating mounting bracket is used to be fixed on the surface of the battery module, the battery module includes a plurality of battery cells arranged in sequence, and the insulating mounting bracket includes a mounting groove, and the mounting groove extends along the arrangement direction of the plurality of battery cells; The heat conducting member is installed in the mounting groove, the bottom wall of the mounting groove includes an opening, the opening faces the plurality of battery cells, and the heat conducting member contacts the surfaces of the plurality of battery cells through the opening to conduct heat; The temperature sensor is in contact with the surface of the heat conducting member to collect temperature information of the heat conducting member; The signal acquisition board is fixed to a side of the insulating mounting bracket away from the battery module. The signal acquisition board is electrically connected to the temperature sensor and is used to receive temperature information collected by the temperature sensor.

2. The CCS component according to claim 1, characterized in that, The CCS assembly further includes a plurality of first thermal pads, wherein the openings are a plurality of thermal holes, each of the thermal holes opening toward at least one of the battery cells, and the plurality of first thermal pads are placed in the plurality of thermal holes in a one-to-one correspondence, wherein one end of each of the first thermal pads contacts the heat conducting member, and the other end of each of the first thermal pads contacts at least one of the battery cells.

3. The CCS component according to claim 2, characterized in that, The plurality of heat-conducting holes are arranged in one-to-one correspondence with the plurality of battery cells. One end of each of the first heat-conducting pads contacts the heat-conducting member, and the other end of each of the first heat-conducting pads contacts a corresponding one of the battery cells.

4. The CCS component according to claim 1, characterized in that The CCS assembly also includes multiple second thermal pads, the openings are slots, the extension direction of the slots is the same as the extension direction of the mounting slots, the openings of the slots face the multiple battery cells, the second thermal pads are arranged in the slots, one end of the second thermal pads contacts the heat conductor, and the other end of the second thermal pad contacts the surface of each of the multiple battery cells.

5. The CCS component according to any one of claims 1 to 4, characterized in that The CCS assembly also includes two rows of insulating screws, each row of insulating screws includes multiple insulating screws, the two rows of insulating screws are arranged on both sides of the mounting slot, the screw rods of the insulating screws are installed on the insulating mounting bracket, and the nuts of the insulating screws are abutted against one end of the heat conductor away from the bottom wall of the mounting slot.

6. The CCS component according to any one of claims 1 to 4, characterized in that, The CCS assembly also includes two rows of clips, each row of clips includes multiple clips, and the two rows of clips are arranged on both sides of the mounting slot. One end of the clip is connected to the insulating mounting bracket, and the other end of the clip abuts against one end of the heat conductor away from the bottom wall of the mounting slot.

7. The CCS component according to any one of claims 1 to 4, characterized in that The CCS assembly further includes a hot pressing film, which is fixed on the insulating mounting bracket, and the heat conducting member is fixed to the mounting groove via the hot pressing film.

8. The CCS component according to any one of claims 1 to 7, characterized in that, The heat conducting element is a heat pipe, or the material of the heat conducting element is graphene.

9. The CCS component according to any one of claims 1 to 8, characterized in that The CCS component further includes two rows of conductive bars, which are fixed to the side of the insulating mounting bracket facing away from the battery module. The extending directions of the two rows of conductive bars are the same as the extending direction of the signal acquisition board, and the two rows of conductive bars are located on both sides of the signal acquisition board. The signal acquisition board is electrically connected to the two rows of conductive bars, and is used to collect the current and voltage information of the two rows of conductive bars and send the current and voltage information of the two rows of conductive bars to the controller.

10. A battery pack, characterized in that, It includes a battery module and the CCS component according to any one of claims 1 to 9. The battery module includes a plurality of battery cells arranged in sequence. The CCS component is fixed to the pole side of the plurality of battery cells, and the CCS component is used to detect the temperatures of the plurality of battery cells.

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