All-cell signal acquisition CCS thermal safety combination device

Abstract

The utility model provides a CCS thermal safety combination device for all-cell signal acquisition, which comprises a plastic uptake isolation plate used for being electrically connected with a battery assembly, the plastic uptake isolation plate is provided with a cell area and positioning areas, and the positioning areas are arranged on two opposite sides of the cell area; the FPC is mounted in the battery cell area and is electrically connected with the blister isolation plate; the fireproof sheet is arranged corresponding to the FPC and the blister isolation plate so as to cover the surface of the FPC and the surface of the blister isolation plate; and the insulating sheet covers the fireproof sheet and is fixedly connected with the blister isolation plate. The fireproof sheet is placed on the FPC to avoid the battery cell explosion-proof valve, and the whole insulating sheet is placed at the top end of the fireproof sheet, so that the battery cell can be effectively protected, heat spreading during thermal runaway of the battery cell is prevented, the risk of thermal runaway of the battery cell is reduced, and the maintenance and replacement cost of the battery is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of solar cell manufacturing, in particular to a CCS thermal safety combination device for collecting full-cell signals. Background Art

[0002] Electrochemical energy storage systems are usually composed of multiple battery modules connected in series or in parallel to achieve the required voltage and power output. Battery cell signal acquisition and thermal safety management in the battery cell module are key to ensuring safe and reliable operation of the system. In the existing technology, battery cell signal acquisition components such as FPC (flexible printed circuit board), PCB (printed circuit board) and FFC (flat flexible cable) are usually used to connect battery cells to battery management systems (BMS) to achieve battery cell voltage and temperature acquisition. These signal acquisition components are connected to plastic structural parts and copper and aluminum busbars and other components through hot pressing or riveting processes to form a whole, ensuring electrical connection and signal transmission between battery cells.

[0003] However, existing cell signal acquisition technologies have some limitations. First, due to the large number of cells, existing acquisition methods may not be able to fully cover all cells, resulting in the inability to collect signals from some cells, thereby affecting the accuracy of the BMS system and the overall performance of the battery. Secondly, although existing fireproof cloth materials can isolate cells in thermal runaway to a certain extent, their protective effect is limited and cannot effectively prevent the spread of thermal runaway. Finally, in order to achieve effective thermal safety management, existing protective measures often require the addition of additional materials and processes, which not only increases the cost of the battery, but may also affect the volume and weight of the battery. Utility Model Content

[0004] The purpose of the utility model is to solve the problem of poor protection effect of the CCS thermal safety combination device for full-cell signal acquisition.

[0005] The utility model provides a CCS thermal safety combination device for full cell signal acquisition, comprising:

[0006] A blister isolation plate is used to electrically connect to the battery core, and the blister isolation plate is provided with a battery core area and a positioning area, wherein the positioning areas are located on two opposite sides of the battery core area;

[0007] An FPC is placed on and covers the battery core area and is electrically connected to the blister isolation plate;

[0008] A fireproof sheet is provided corresponding to the FPC and the blister isolation plate to cover the surfaces of the FPC and the blister isolation plate;

[0009] An insulating sheet covers the fireproof sheet and is fixedly connected to the blister isolation plate.

[0010] Furthermore, the blister isolation plate is provided with a plurality of first avoidance holes and a plurality of positioning grooves, the first avoidance holes are arranged in the battery core area and are spaced apart along the length direction, and the positioning grooves are arranged in the positioning area and are spaced apart along the length direction.

[0011] Furthermore, the positioning area includes a first positioning area and a second positioning area, and the first positioning area and the second positioning area are respectively placed on two opposite sides of the battery cell area in the width direction and are fixedly connected to the battery cell area.

[0012] Furthermore, the FPC includes a first FPC and a second FPC, the first FPC and the second FPC are parallel and spaced apart to form a channel, and when the FPC is connected to the blister isolation plate, the plurality of first avoidance holes have overlapping portions with the channel in the thickness direction of the FPC;

[0013] One end of the first FPC and one end of the second FPC are fixedly connected by an extension piece, and a second avoidance hole is provided on the extension piece. The second avoidance hole has an overlapping portion with the first avoidance hole in the thickness direction of the FPC, and is used to avoid the battery cell explosion-proof valve.

[0014] Furthermore, the fireproof sheet includes a first fireproof sheet and a second fireproof sheet, the first fireproof sheet covers the first FPC and the first positioning area, and the second fireproof sheet covers the second FPC and the second positioning area.

[0015] Furthermore, the side of the first fireproof sheet close to the second fireproof sheet is 5mm-7mm away from the edge of the channel, and the side of the second fireproof sheet close to the first fireproof sheet is 5mm-7mm away from the edge of the channel.

[0016] Furthermore, a plurality of sensors are provided on the FPC, and the sensors are fixedly arranged on two opposite sides of the FPC in the length direction, and are used to collect voltage and temperature signals of each battery cell.

[0017] Furthermore, a third avoidance hole is provided on the insulating sheet. The third avoidance hole is arranged at intervals along the length direction of the insulating sheet and has an overlapping portion with the first avoidance hole in the thickness direction of the insulating sheet, so as to avoid the explosion-proof valve of the battery cell.

[0018] Furthermore, the battery cell area is provided with a plurality of clips, and the clips are placed on the blister isolation plate between the two first avoidance holes. The insulating sheet is provided with a card interface matching the clips, and the clips are connected with the card interface to fix the blister isolation plate, the fireproof sheet and the insulating sheet.

[0019] Furthermore, it also includes a plurality of aluminum bars, which are placed in the positioning grooves and riveted to the blister isolation plate and electrically connected to the battery core.

[0020] Compared with the existing technology, the present invention includes at least the following beneficial effects: by placing a fireproof sheet on the FPC to avoid the battery cell explosion-proof valve, and placing a whole insulating sheet on top of the fireproof sheet, the battery cell can be effectively protected to prevent heat spread when the battery cell thermal runaway occurs, reducing the risk of thermal runaway of the battery cell, thereby reducing the cost of battery maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention 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 invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 This is a schematic structural diagram of a CCS thermal safety assembly device in one embodiment of the present invention;

[0023] Figure 2 This is an exploded view of the CCS thermal safety assembly in one embodiment of the present invention;

[0024] Figure 3 This is a structural diagram of a blister isolation plate in one embodiment of the present invention;

[0025] Figure 4 This is a structural diagram of an FPC in one embodiment of the present utility model;

[0026] Figure 5 This is a schematic structural diagram of a fireproof sheet in one embodiment of the present invention;

[0027] Figure 6 This is a schematic structural diagram of an insulating sheet in one embodiment of the present utility model;

[0028] Figure 7 for Figure 1 A magnified diagram of the details at point A.

[0029] Among them, 1-blister isolation plate; 11-battery cell area; 12-positioning area; 13-clip part; 111-first avoidance hole; 121-first positioning area; 122-second positioning area; 123-positioning groove; 2-FPC; 21-first FPC; 22-second FPC; 23-clamp; 24-extension piece; 25-second avoidance hole; 26-sensor; 3-fireproof sheet; 31-first fireproof sheet; 32-second fireproof sheet; 4-insulating sheet; 41-third avoidance hole; 42-card interface; 5-aluminum bar. DETAILED DESCRIPTION

[0030] The following is a more detailed description of a CCS thermal safety combination device for full-cell signal acquisition, using schematic diagrams. These schematic diagrams illustrate preferred embodiments of the present invention. It should be understood that those skilled in the art may modify the present invention as described herein while still achieving its beneficial effects. Therefore, the following description should be understood as generally known to those skilled in the art and not as a limitation of the present invention.

[0031] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "includes," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0032] The following paragraphs describe the present invention in more detail by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are greatly simplified and not to exact scale, and are intended solely to facilitate and clearly illustrate the embodiments of the present invention.

[0033] The utility model provides a CCS (cell contact system) thermal safety combination device for full cell signal acquisition, such as Figure 1 and Figure 2 As shown, including:

[0034] A blister isolation plate 1 is used for electrically connecting to the battery cell. The blister isolation plate 1 is provided with a battery cell area 11 and a positioning area 12. The positioning area 12 is located on two opposite sides of the battery cell area 11.

[0035] FPC2, placed on and covering the battery core area 11, and electrically connected to the blister isolation plate 1;

[0036] A fireproof sheet 3 is provided corresponding to the FPC 2 and the blister isolation plate 1 to cover the surface of the FPC 2 and the blister isolation plate 1;

[0037] The insulating sheet 4 covers the fireproof sheet 3 and is fixedly connected to the blister isolation plate 1.

[0038] For details, please refer to Figure 1 and Figure 2The blister isolation plate is the supporting structure of the battery cell and is also a key component of the electrical connection. It is made through a special process and has good electrical insulation performance and mechanical strength. A battery cell area 11 is set on the blister isolation plate 1 for placing the battery cell. The battery cell area usually has a groove or fixed structure suitable for the shape and size of the battery cell to ensure that the battery cell is stably fixed in the appropriate position. The positioning area 12 is located on both sides of the battery cell area 11 and is used to accurately position the battery cell to prevent the battery cell from moving in the device and ensure the accuracy of the connection between the battery cell and the FPC2. FPC2 is a soft circuit board used to transmit signals between the battery cell and the external circuit. The FPC2 is covered on the battery cell area 11 and forms a good electrical contact with each battery cell. FPC2 can be electrically connected to the blister isolation plate 1 by welding, crimping or other electrical connection techniques, so that the signal of the battery cell can be effectively transmitted to the external monitoring system.

[0039] The fireproof sheet 3 is a protective material used to protect the FPC 2 and the blister insulation board 1 from high temperatures or fire, preventing flames from spreading and electrical shorts. The fireproof sheet 3 covers the surfaces of the FPC 2 and the blister insulation board 1 and fits snugly, ensuring necessary protection in an emergency. The insulating sheet 4 provides additional electrical insulation and secures the fireproof sheet 3, enhancing the structural stability of the entire device. The insulating sheet 4 can be attached to the blister insulation board 1 by bonding, clamping, or other fixing methods, ensuring that the fireproof sheet 3 does not shift while providing good insulation.

[0040] In a possible embodiment of the present invention, the fireproof sheet 3 is preferably made of a ceramic aerogel material that is resistant to high temperatures and has strong flame retardancy, and the insulating sheet 4 is made of a polycarbonate material.

[0041] For further information, please refer to Figure 3 The blister isolation plate 1 is provided with a plurality of first avoidance holes 111 and a plurality of positioning grooves 123. The first avoidance holes 111 are arranged in the battery core area and are spaced apart along the length direction. The positioning grooves 123 are arranged in the positioning area 12 and are spaced apart along the length direction.

[0042] Specifically, the first clearance hole 111 and positioning groove 123 on the blister isolation plate 1 are designed to enhance the securement of the battery cells and the accuracy of signal acquisition. The first clearance hole 111 is located on the blister isolation plate 1 in the battery cell area 11, primarily to clear the battery cell's explosion-proof valve, allowing the valve to pass through the first clearance hole 111. This ensures that the battery cells are not obstructed during installation while allowing sufficient space for thermal expansion, preventing structural damage caused by thermal expansion. Spacing along the length ensures that the explosion-proof valve of each battery cell can pass through the clearance hole correctly, thereby maintaining uniform distribution and stability among the battery cells. Positioning grooves 123, located in the positioning area 12, are used to precisely position the battery cells and maintain their correct position within the device. These notches can be aligned with specific features of the battery cells, such as edges or protrusions, to prevent lateral movement within the device. Spacing along the length to match the size and shape of the battery cells facilitates quick and accurate installation and facilitates automated assembly during mass production.

[0043] In this embodiment, preferably, the size of the first avoidance hole 111 matches the size of the battery cell explosion-proof valve.

[0044] The design of avoidance holes and positioning slots reduces mechanical stress on the battery cells during installation and use, mitigating potential safety risks caused by physical damage. Precise positioning and fixation ensure long-term stable and reliable electrical connection between the battery cells and the FPC, reducing signal acquisition errors caused by poor contact. When battery cells need to be replaced, these features make removal and reinstallation easier, reducing maintenance costs and time.

[0045] Furthermore, the positioning area includes a first positioning area 121 and a second positioning area 122 . The first positioning area and the second positioning area are respectively placed on two opposite sides of the battery cell area in the width direction and are fixedly connected to the battery cell area.

[0046] Specifically, the first positioning area 121 is located on one long side of the battery cell area 11, and the second positioning area 122 is located on the other side. The primary function of the first and second positioning areas 121, 122 is to limit the movement of the battery cells in the width direction, ensuring the horizontal stability of the battery cells after installation. By cooperating with the specific structure of the battery cells (such as edges or protrusions), the first and second positioning areas 121, 122 can effectively secure the battery cells and prevent them from shifting due to vibration or impact during use.

[0047] In this embodiment, the first positioning area 121 and the second positioning area 122 are formed on the blister isolation plate 1 using an integrated blister molding process. Those skilled in the art can also implement this by using additional fixings (such as screws, clips, etc.). The symmetrical arrangement of the first and second positioning areas improves the fixation of the battery cell in the device, ensuring the stability and safety of the battery cell during long-term use. This enhances the structural strength of the entire device, enabling it to better withstand external forces, especially during transportation and use.

[0048] For further information, please refer to Figure 4 The FPC2 includes a first FPC21 and a second FPC22. The first FPC and the second FPC are parallel and spaced apart to form a channel 23. When the FPC2 is connected to the blister isolation plate 1, the plurality of first avoidance holes 111 have overlapping portions with the channel 23 in the thickness direction of the FPC2.

[0049] One end of the first FPC 21 and one end of the second FPC 22 are fixedly connected by an extension piece 24. The extension piece 24 is provided with a second avoidance hole 25. The second avoidance hole 25 has an overlapping portion with the first first avoidance hole 111 in the thickness direction of the FPC2, and is used to avoid the battery cell explosion-proof valve.

[0050] The first FPC 21 and the second FPC 22 are arranged in parallel, with a gap between them to form a channel 23. This layout allows the FPC to be flexibly arranged above the battery cell, while providing space for the explosion-proof valve or other protruding parts of the battery cell. The two FPCs are responsible for contacting different areas of the battery cell, thereby collecting the signal of the battery cell. The parallel layout can increase the coverage of signal acquisition and improve the accuracy of signal acquisition. Channel 23 is the space between the first FPC 21 and the second FPC 22, which is used to avoid the explosion-proof valve or other possible protruding parts of the battery cell. This prevents the FPC from contacting or rubbing with these parts of the battery cell, ensuring the safety of the FPC and the reliability of the electrical connection. At the same time, the battery cell explosion-proof valve can pass through the second avoidance hole 25. In this embodiment, preferably, the width of the channel 23 is the same as the width of the first avoidance hole 111, and the second avoidance hole 25 completely overlaps with the first avoidance hole 111 (that is, the same size).

[0051] The extension piece 24 connects the first FPC 21 and the second FPC 22, securing the two FPCs in position, maintaining the spacing between them, and providing additional support. In this embodiment, the extension piece 24 connects to the first and second FPC 21 and 22 ends in the same direction, and is integrally formed with the FPCs during fabrication. Alternatively, the extension piece 24 can be secured by welding, bonding, or other methods. Since a battery cell is located at the location of the extension piece 24, a second escape hole 25 is required to clear the cell's explosion-proof valve.

[0052] For further information, please refer to Figure 5 The fireproof sheet includes a first fireproof sheet 31 and a second fireproof sheet 32. The first fireproof sheet covers the first FPC and the first positioning area, and the second fireproof sheet covers the second FPC and the second positioning area.

[0053] The first fireproof sheet 31 covers the first FPC 21 and its corresponding cell area, as well as the first positioning area 121. This not only protects the FPC from high temperatures but also the positioning area, ensuring the structural integrity of the entire device in the event of a fire. Similarly, the second fireproof sheet 32 ​​performs the same function as the first fireproof sheet 31 and will not be further described here.

[0054] Furthermore, the side of the first fireproof sheet 31 close to the second fireproof sheet 32 ​​is 5mm-7mm away from the edge of the channel 23, and the side of the second fireproof sheet 32 ​​close to the first fireproof sheet 31 is 5mm-7mm away from the edge of the channel 23.

[0055] Specifically, a certain distance is provided between the fireproof sheet and the channel to prevent the fireproof sheets from contacting or squeezing each other during installation or expansion of the battery cell, ensuring that they can independently play a protective role. In the present utility model, the distance between the fireproof sheet and the edge of the channel 23 is preferably 5 mm.

[0056] Furthermore, the FPC is equipped with multiple sensors 26, which are fixed on two opposite sides of the FPC along its length to collect voltage and temperature signals from each battery cell. The sensors 26 are located on the FPC, meaning they are fixed to the portion connecting the first FPC and the second FPC. The sensors 26 are distributed along the length of the FPC to provide coverage for each battery cell.

[0057] In this embodiment, the sensor 26 includes a temperature sensor and a voltage sensor. The voltage sensor is used to monitor the voltage of each battery cell to help assess the charge state and health status of the battery cell and balance the voltage differences between the battery cells. The temperature sensor is used to monitor the temperature of the battery cell to ensure that the battery cell operates within the optimal operating range. Those skilled in the art may choose a sensor that can simultaneously collect voltage and temperature signals, or may set up two types of sensors.

[0058] Further, such as Figure 6 As shown, the insulating sheet 4 is provided with a third avoidance hole 41, which is spaced apart along the length direction of the insulating sheet 4 and overlaps with the first avoidance hole 111 in the thickness direction of the insulating sheet 4, for avoiding the explosion-proof valve of the battery cell.

[0059] Specifically, the third avoidance holes 41 are spaced apart along the length direction of the insulating sheet 4, which means that there is a avoidance hole at a certain distance along the entire length of the insulating sheet 4. This layout ensures that there is still enough space for the battery cell explosion-proof valve or other protruding parts under the cover of the insulating sheet 4. At the same time, the third avoidance hole 41 is set to have an overlapping part with the first avoidance hole 111 (located on the blister isolation plate) in the thickness direction of the insulating sheet 4, ensuring that when the CCS assembly is installed, the battery cell explosion-proof valve can pass through the third avoidance hole 41 without being obstructed by the insulating sheet. In this embodiment, preferably, the third avoidance hole 41 completely overlaps with the first avoidance hole 111 (that is, the same size).

[0060] Furthermore, the battery cell area is provided with a plurality of clips 13, which are placed on the blister isolation plate between the two first avoidance holes, and the insulating sheet is provided with a card interface 42 matching the clip, and the clip is connected with the card interface to fix the blister isolation plate 1, the fireproof sheet 3 and the insulating sheet 4.

[0061] The clips 13 are located on the blister insulation board 1 between the two first avoidance holes 111. This means they are evenly distributed along the entire length of the cell area 11. They are used to secure and support the blister insulation board 1, while also providing connection points for the fireproof sheet 3 and the insulating sheet 4. The clip interfaces 42 are located on the insulating sheet 4 and correspond to the clips 13 on the blister insulation board 1 in the cell area 11. The clip interfaces 42 are designed to mate with the clips 13, thereby achieving a fixed connection between the insulating sheet 4, the blister insulation board 1, and the fireproof sheet 3.

[0062] Further, it also includes multiple aluminum bars 5, please refer to Figure 7 The aluminum bar is placed in the positioning groove and riveted to the blister isolation plate 1 and is electrically connected to the battery cell.

[0063] To enhance the electrical connection between the battery cells and the CCS thermal safety assembly, the present invention further includes a plurality of aluminum bars 5, which are positioned within positioning slots 123. The aluminum bars 5 are accurately positioned in predetermined locations through the positioning slots 123. In one possible embodiment of the present invention, the aluminum bars 5 are secured to the blister insulation plate 1 by riveting. This is achieved by drilling holes in the aluminum bars 5 and the blister insulation plate 1 and inserting rivets through these holes.

[0064] In summary, by placing a fireproof sheet on the FPC to avoid the battery cell explosion-proof valve and placing a whole insulating sheet on top of the fireproof sheet, the battery cell voltage and temperature signals of the complete module can be collected, which can more comprehensively monitor the battery's working status and improve the accuracy and reliability of the battery management system.

[0065] The above examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. Those skilled in the art of the present invention can make some simple deductions, modifications or substitutions based on the concept of the present invention.

Claims

1. A CCS thermal safety combination device for full cell signal acquisition, characterized in that: include: A blister isolation plate is used to electrically connect to the battery core, and the blister isolation plate is provided with a battery core area and a positioning area, wherein the positioning areas are located on two opposite sides of the battery core area; An FPC is placed on and covers the battery core area and is electrically connected to the blister isolation plate; A fireproof sheet is provided corresponding to the FPC and the blister isolation plate to cover the surfaces of the FPC and the blister isolation plate; An insulating sheet covers the fireproof sheet and is fixedly connected to the blister isolation plate.

2. The CCS thermal safety combination device for full-cell signal acquisition according to claim 1, characterized in that: The blister isolation plate is provided with a plurality of first avoidance holes and a plurality of positioning grooves. The first avoidance holes are arranged in the battery core area and are spaced apart along the length direction. The positioning grooves are arranged in the positioning area and are spaced apart along the length direction.

3. The CCS thermal safety combination device for full-cell signal acquisition according to claim 2, characterized in that: The positioning area includes a first positioning area and a second positioning area. The first positioning area and the second positioning area are respectively placed on two opposite sides of the battery cell area in the width direction and are fixedly connected to the battery cell area.

4. The CCS thermal safety combination device for full-cell signal acquisition according to claim 3, characterized in that: The FPC includes a first FPC and a second FPC, the first FPC and the second FPC are parallel and spaced apart to form a channel, and when the FPC is connected to the blister isolation plate, the plurality of first avoidance holes have overlapping portions with the channel in the thickness direction of the FPC; One end of the first FPC and one end of the second FPC are fixedly connected by an extension piece, and a second avoidance hole is provided on the extension piece. The second avoidance hole has an overlapping portion with the first avoidance hole in the thickness direction of the FPC, and is used to avoid the battery cell explosion-proof valve.

5. The CCS thermal safety combination device for full-cell signal acquisition according to claim 4, characterized in that: The fireproof sheet includes a first fireproof sheet and a second fireproof sheet. The first fireproof sheet covers the first FPC and the first positioning area, and the second fireproof sheet covers the second FPC and the second positioning area.

6. The CCS thermal safety combination device for full-cell signal acquisition according to claim 5, characterized in that: The side of the first fireproof sheet close to the second fireproof sheet is 5mm-7mm away from the edge of the channel, and the side of the second fireproof sheet close to the first fireproof sheet is 5mm-7mm away from the edge of the channel.

7. The CCS thermal safety combination device for full-cell signal acquisition according to claim 4, characterized in that: The FPC is further provided with a plurality of sensors, which are fixedly arranged on two opposite sides of the FPC in the length direction and are used to collect voltage and temperature signals of each battery cell.

8. The CCS thermal safety combination device for full cell signal acquisition according to claim 2, characterized in that: The insulating sheet is provided with a third avoidance hole, which is spaced apart along the length direction of the insulating sheet and has an overlapping portion with the first avoidance hole in the thickness direction of the insulating sheet, and is used to avoid the explosion-proof valve of the battery cell.

9. The CCS thermal safety combination device for full cell signal acquisition according to claim 2, characterized in that: The battery cell area is provided with a plurality of clips, and the clips are placed on the blister isolation plate between the two first avoidance holes. The insulating sheet is provided with a card interface matching the clips, and the clips are connected with the card interface to fix the blister isolation plate, the fireproof sheet and the insulating sheet.

10. The CCS thermal safety combination device for full cell signal acquisition according to claim 2, characterized in that: It also includes a plurality of aluminum bars, which are placed in the positioning grooves and riveted to the blister isolation plate and electrically connected to the battery core.

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