Battery cell protection system, battery pack and electric equipment

Abstract

The embodiment of the utility model relates to the technical field of automobile parts, in particular to a battery cell protection system, a battery pack and electric equipment. The battery cell protection system comprises a buffer mechanism, the buffer mechanism comprises a connecting assembly, and a cavity is formed in the connecting assembly; and the buffer assembly is arranged in the cavity. According to the battery cell protection system, the battery pack and the electric equipment, the battery cell and the cross beam can be prevented from being extruded, so that the phenomena of damage and thermal failure of the battery cell are prevented, and after the battery cell circularly expands for a long time, the buffer assembly can reversely extrude the battery cell, so that the battery cell is prevented from expanding.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a cell protection system, battery pack and electrical equipment. Background Technology

[0002] The battery pack is the core component of an electric vehicle. Its main function is to store electrical energy. The battery pack is composed of multiple cells connected in series and parallel to provide the voltage and capacity required by the vehicle.

[0003] The battery pack of this technology consists of a frame and multiple battery cells. To enhance the strength of the frame, crossbeams are installed inside. These battery cells are installed in multiple mounting spaces formed by the crossbeams and the frame.

[0004] However, after prolonged high-current charge-discharge cycles, the battery cells may expand. When a cell expands, cells near the crossbeam may be compressed against it. If a cell is damaged as a result, it may cause a short circuit in the battery pack, potentially leading to thermal runaway. Utility Model Content

[0005] This application provides a cell protection system, a battery pack, and an electrical device to solve the technical problem of cell crushing against a crossbeam, which leads to cell damage, short circuits, and thermal runaway.

[0006] In a first aspect, embodiments of this application provide a battery cell protection system, including: a buffer mechanism, the buffer mechanism comprising:

[0007] A connecting component having a cavity formed therein;

[0008] A buffer assembly is disposed within the cavity.

[0009] In some embodiments, the connecting assembly is disposed between a crossbeam and the battery cell within the frame of the battery pack.

[0010] In some embodiments, the buffer assembly includes an elastic filler for filling the cavity.

[0011] In some embodiments, the connecting component is an adhesive element used to attach the crossbeam and the battery cell.

[0012] In some embodiments, the connecting component is provided with at least one balancing hole.

[0013] In some embodiments, the connecting assembly includes a frame and a crossbar, the frame being disposed between the crossbeam and the battery cell, the top of the frame being an opening, and the crossbar being disposed within the opening of the frame to form the balance hole between the crossbar and the inner wall of the frame.

[0014] In some embodiments, a first heating mechanism is further included, which is disposed between the crossbeam and the connecting assembly, and the first heating assembly is used to heat the crossbeam.

[0015] In some embodiments, the first heating mechanism is provided with a filling hole, one end of which passes through the first heating mechanism and the other end of which communicates with the cavity.

[0016] In some embodiments, the first heating mechanism includes:

[0017] A first heating element is used to heat the crossbeam.

[0018] A first mounting component is disposed between the first heating component and the crossbeam, and the first mounting component is used to fix the first heating component to the crossbeam.

[0019] In some embodiments, a second heating mechanism is further included, which is disposed between the connection assembly and the battery cell, and is used to heat the battery cell.

[0020] In some embodiments, the projection of the second heating mechanism is within the projection range of the connecting assembly and the buffer assembly along a direction perpendicular to the crossbeam.

[0021] In some embodiments, an insulation mechanism is also included, which is disposed between the connection assembly and the battery cell.

[0022] Secondly, embodiments of this application provide a battery pack, including a frame and a cell protection system disposed on the frame.

[0023] In some embodiments, a crossbeam is provided on the frame, and a filling hole is provided on the crossbeam. One end of the filling hole passes through the crossbeam, and the other end of the filling hole communicates with the cavity.

[0024] Thirdly, embodiments of this application provide an electrical device, including a body and a battery cell protection system disposed on the body.

[0025] This application provides a cell protection system, a battery pack, and an electrical device. The cell protection system uses a connecting component with a cavity formed within it. A buffer component is placed within the cavity, allowing the connecting component to limit the buffer component. When the cell expands, the expanded cell can squeeze the buffer component, thus preventing the expanded cell from being squeezed against the crossbeam and preventing cell breakage. This also prevents short circuits and thermal runaway in the broken cell. Furthermore, when the cell expands due to long-term cycling, the buffer component can exert a reverse squeezing effect on the expanded cell, thereby preventing further expansion. Attached Figure Description

[0026] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0027] Figure 1 Exploded view of the cell protection system provided in this application Figure 1 ;

[0028] Figure 2 A partial structural schematic diagram of the battery cell protection system provided in this application in its assembled state;

[0029] Figure 3 A schematic diagram of the connection harness and connector of the battery cell protection system provided in this application;

[0030] Figure 4 Exploded view of the cell protection system provided in this application Figure 2 .

[0031] Explanation of reference numerals in the attached figures:

[0032] 100. Buffer mechanism; 110. Connecting assembly; 111. Balancing hole; 112. Frame; 113. Crossbar; 120. Buffer assembly; 130. Cavity;

[0033] 200, First heating mechanism; 210, Filling hole; 220, First heating element; 221, Heating core; 222, PI film; 223, Thermosetting colloid; 230, First mounting assembly;

[0034] 300. Second heating mechanism;

[0035] 400. Connecting wire harness; 410. Connector;

[0036] 500, Frame; 510, Crossbeam; 520, Filling hole; 530, Indicator arrow;

[0037] 600, battery cell;

[0038] 700. Insulation mechanism.

[0039] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0040] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0041] The battery pack of this technology consists of a frame and multiple battery cells. To enhance the strength of the frame, crossbeams are installed inside. These battery cells are installed in multiple mounting spaces formed by the crossbeams and the frame.

[0042] However, after prolonged high-current charge-discharge cycles, lithium ions escape from the positive electrode and embed into the negative electrode material during charging and discharging, leading to an increase in the interlayer spacing of the negative electrode material and causing expansion. This expansion recovers somewhat during discharge, but after long-term cycling, some expansion may become irreversible, and the battery cell may expand. When the battery cell expands, cells near the crossbeam may be compressed against it. If the cell is damaged as a result, it may cause a short circuit in the battery pack, leading to thermal runaway. Thermal runaway refers to an uncontrollable exothermic chain reaction occurring inside the lithium-ion battery cell, causing a rapid increase in cell temperature and pressure.

[0043] This application provides a cell protection system, battery pack, and electrical equipment. A first mounting component secures a first heating component to a crossbeam, and an adhesive component secures a second heating component to the first heating component. An elastic filler is filled through a filling hole on the crossbeam, allowing it to enter the cavity along the filling hole and the filling hole. Excess air in the cavity is discharged through a balance hole as the elastic filler enters. When the cell expands, the expanded cell compresses the elastic filler and the adhesive component, thus buffering the expanded cell and preventing direct contact between the expanded cell and the crossbeam, which could damage the cell and prevent short circuits and thermal runaway.

[0044] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0045] Combination Figure 1 and Figure 2 This application provides a battery cell protection system, including: a buffer mechanism 100, the buffer mechanism 100 including:

[0046] Connecting component 110, with cavity 130 formed inside;

[0047] A buffer assembly 120 is disposed within the cavity 130 and is used to buffer the expansion of the battery cell 600.

[0048] The connecting assembly 110 is disposed between the crossbeam 510 and the battery cell 600 within the frame 500 of the battery pack.

[0049] In this embodiment, the connecting assembly 110 passes through the side of the cavity 130 near the crossbeam 510, and the connecting assembly 110 passes through the side of the cavity 130 away from the crossbeam 510; in other embodiments, the connecting assembly 110 may also be disposed between adjacent cells 600, or the connecting assembly may be disposed between the frame 500 and the cells 600.

[0050] In this application, by employing a connecting component 110 and forming a cavity 130 within the connecting component 110, and by placing a buffer component 120 within the cavity 130, the connecting component 110 can limit the buffer component 120. When the battery cell 600 expands, the expanded battery cell 600 can squeeze the buffer component 120, allowing the buffer component 120 to buffer the battery cell 600, thereby preventing the expanded battery cell 600 from being squeezed against the crossbeam 510, thus preventing the battery cell 600 from breaking, and preventing the broken battery cell 600 from experiencing short circuits and thermal runaway. Furthermore, when the battery cell 600 expands cyclically over a long period of time, the buffer component 120 can exert a reverse squeezing effect on the expanded battery cell 600, thereby preventing the battery cell 600 from expanding.

[0051] Combination Figure 1 and Figure 2 The buffer assembly 120 includes an elastic filler for filling the cavity 130.

[0052] In this embodiment, the elastic filler is a potting compound; in other embodiments, the elastic filler may be replaced with polyurethane structural adhesive, acrylic structural adhesive, silicone, epoxy structural adhesive or high-temperature hot melt adhesive.

[0053] In this application, by employing an elastic filler, when the expanded cell 600 compresses the elastic filler, the elastic filler, being elastic, can absorb the displacement generated by the expanded cell 600, thereby preventing cell 600 from breaking. Furthermore, it prevents the expanded cell 600 from being crushed by the elastic filler, thus protecting the cell 600. The use of potting compound, with its excellent thermal conductivity, allows the heat generated by the cell 600 to be transferred to the crossbeam 510 when it overheats, minimizing the risk of overheating during charging and discharging cycles, improving safety and extending battery life. The potting compound also exhibits good high and low temperature resistance, allowing it to operate for extended periods over a wide temperature range, maintaining stable cell 600 performance. Finally, the potting compound possesses excellent electrical insulation properties, further enhancing the safety and stability of the cell 600.

[0054] In other embodiments, the cushioning component 120 may also be replaced with a high-temperature resistant deformable plastic, such as a thermoplastic elastomer.

[0055] Combination Figure 1 and Figure 2 The connecting component 110 is an adhesive component used to attach the crossbeam 510 and the battery cell 600. The width of the adhesive component is less than or equal to 10mm.

[0056] In this embodiment, the adhesive is a thermosetting adhesive. The thermosetting adhesive is applied between the crossbeam 510 and the battery cell 600, and then heated to cure the adhesive, thereby fixing the crossbeam 510 and the battery cell 600.

[0057] In this application, by using thermosetting adhesive, the thermosetting adhesive can not only fix the crossbeam 510 and the cell 600, but also limit the potting compound in the cavity 130 after curing, thereby preventing the potting compound from overflowing to other parts of the battery pack, improving the connection strength between the thermosetting adhesive and the crossbeam 510 and the cell 600, and improving the limiting effect on the potting compound.

[0058] In other embodiments, the adhesive can also be replaced with a high-temperature resistant adhesive, such as epoxy resin adhesive.

[0059] Combination Figure 1 and Figure 2 The connecting component 110 is provided with at least one balancing hole 111.

[0060] In this embodiment, two balance holes 111 are provided, and the two balance holes 111 are respectively provided at the top two ends of the connecting component 110.

[0061] In this application, by providing a balance hole 111 on the connecting component 110, when potting compound is filled into the cavity 130, excess air in the cavity 130 can be discharged along the balance hole 111. When the cavity 130 is filled with potting compound, excess potting compound can also be discharged along the balance hole 111. This allows the potting compound to flow to various positions in the cavity 130 due to gravity, thereby improving the filling density of the potting compound in the cavity 130 and indirectly improving the buffering effect of the potting compound on the expanded battery cell 600.

[0062] Combination Figure 1 and Figure 2 The connecting assembly 110 includes a frame 112 and a crossbar 113. The frame 112 is disposed between the crossbeam 510 and the battery cell 600. The top of the frame 112 is open. The crossbar 113 is disposed in the opening of the frame 112 to form a balance hole 111 between the crossbar 113 and the inner wall of the frame 112.

[0063] In this embodiment, the frame 112 is U-shaped, and the crossbar 113 spans the opening of the U-shaped frame 112. Two balance holes 111 are respectively set between the two ends of the crossbar 113 and the inner wall of the frame 112. In other embodiments, the frame 112 can be set as arc-shaped, and the crossbar 113 spans the recess of the arc-shaped frame 112, which can also form a cavity 130 between the frame 112, the crossbar 113, the crossbeam 510 and the battery cell 600.

[0064] In this application, by adopting the frame 112 and crossbar 113, when applying the thermosetting adhesive to the frame 112 and crossbar 113, a balance hole 111 can be directly formed in the uncoated area between the frame 112 and crossbar 113, without the need to set the balance hole 111 separately on the connecting component 110 after it is arranged, thereby simplifying the operator's convenience in arranging the connecting component 110.

[0065] Combination Figure 1 and Figure 2 In some embodiments, the cell protection system further includes a first heating mechanism 200, which is disposed between the crossbeam 510 and the connecting assembly 110, and the first heating assembly is used to heat the crossbeam 510.

[0066] In this embodiment, the cavity 130 is disposed between the first heating mechanism 200, the connecting component 110 and the battery cell 600, and the adhesive is used to fix the first heating mechanism 200 and the battery cell 600.

[0067] In this application, by employing a first heating mechanism 200 mounted on a crossbeam 510, heat can be indirectly and directly transferred to the battery cell 600 via the crossbeam 510, thereby achieving rapid and uniform heating. If the first heating mechanism 200 were directly attached to the battery cell 600, air bubbles might exist between them during the attachment process, potentially causing the first heating mechanism 200 to dry-burn. Dry-burning refers to the first heating mechanism 200 operating without sufficient contact, which could lead to overheating or even damage. By connecting the first heating mechanism 200 to the crossbeam 510 to heat the battery cell 600, dry-burning of the first heating mechanism 200 can be prevented, thus extending the service life of the heating film. The crossbeam 510, due to its large surface area, effectively performs temperature equalization. The contact between the crossbeam 510 and the air further enhances the heat transfer efficiency. The crossbeam 510 not only transfers heat to the battery cell 600, but also releases excess heat into the environment through contact with air, thereby maintaining the temperature balance inside the battery pack. Even in the extreme case of heating relay failure, the system will not pose a significant risk due to the temperature-equalizing effect of the crossbeam 510. As a heat conduction medium, the crossbeam 510 can disperse heat in the event of relay failure, preventing localized overheating and thus protecting the battery pack from the threat of thermal runaway.

[0068] Combination Figure 1 and Figure 2 The first heating mechanism 200 is provided with a filling hole 210. One end of the filling hole 210 passes through the first heating mechanism 200, and the other end of the filling hole 210 is connected to the cavity 130.

[0069] In this embodiment, the filling hole 210 is circular and is located in the upper middle part of the first heating mechanism 200. In other embodiments, the filling hole 210 can be obliquely arranged on the first heating mechanism 200, with the height of the end of the filling hole 210 near the crossbeam 510 being higher than the height of the end of the filling hole 210 away from the crossbeam 510. This allows the potting compound to flow better into the cavity 130 due to gravity when it is filled from the end of the filling hole 210 near the crossbeam 510. The shape of the filling hole 210 can be adaptively adjusted as needed, for example, the filling hole 210 can be set as a rectangle.

[0070] In this application, by adopting the filling hole 210, it is convenient to fill the cavity 130 with potting compound through the filling hole 210 after the first heating mechanism 200, the connecting component 110 and the battery cell 600 are connected and fixed, thereby improving the convenience of filling the first heating mechanism 200, the connecting component 110 and the battery cell 600 with potting compound after installation and fixing.

[0071] Combination Figure 1 and Figure 2 The first heating mechanism 200 includes:

[0072] The first heating element 220 is used to heat the crossbeam 510;

[0073] A first mounting component 230 is disposed between the first heating component 220 and the crossbeam 510, and the first mounting component 230 is used to fix the first heating component 220 to the crossbeam 510.

[0074] In this embodiment, the first heating component 220 includes a heating core 221 and two PI films 222, which are respectively disposed on both sides of the heating core 221. The PI films 222 are fixedly bonded to the heating core 221 by thermosetting adhesive 223. The heating core 221 and the PI films 222 have the same area, and the area of ​​the thermosetting adhesive 223 between the heating core 221 and the PI films 222 is the same as the area of ​​the heating core 221. This allows the thermosetting adhesive 223 to improve the fixing strength between the heating core 221 and the PI films 222 and to prevent the heating core 221 from arcing and short-circuiting. Filling holes 210 are provided on the heating core 221, the two PI films 222, and the two thermosetting adhesives 223.

[0075] In this embodiment, the first mounting component 230 is double-sided adhesive tape, which is disposed between the crossbeam 510 and one of the PI films 222. This allows the double-sided adhesive tape to fix the PI film 222 to the crossbeam 510, thereby fixing the entire first heating component 220 to the crossbeam 510. The area of ​​the double-sided adhesive tape is the same as the area of ​​the PI film 222, thereby improving the fixing strength of the first heating component 220 to the crossbeam 510 and indirectly improving the heat transfer effect of the double-sided adhesive tape on the heat generated by the first heating component 220 to the crossbeam 510. Filling holes 210 are provided on the double-sided adhesive tape. In other embodiments, the first mounting component 230 can be replaced with other adhesives.

[0076] In this application, by adopting the first mounting component 230, the first heating component 220 can be fixed on the crossbeam 510, thereby improving the fixing strength between the first heating component 220 and the crossbeam 510, and indirectly improving the heat transfer efficiency of the first mounting component 230 in transferring the heat generated by the first heating component 220 to the crossbeam 510.

[0077] Combination Figure 1 and Figure 2 In some embodiments, the cell protection system further includes a second heating mechanism 300, which is disposed between the connecting assembly 110 and the cell 600 and is used to heat the cell 600.

[0078] The second heating mechanism 300 includes a heating film; in this embodiment, the heating film is a PI heating film; the cavity 130 is disposed between the heating film, the connecting component 110 and the PI film 222 of the first heating mechanism 200 away from the crossbeam 510, and the adhesive is used to fix the PI film 222 and the heating film.

[0079] In this application, by employing a PI heating film, the PI heating film exhibits extremely high heat resistance, allowing it to operate for extended periods in high-temperature environments without damage. This is crucial for battery heating systems that require operation at high temperatures. The PI heating film provides uniform heat distribution, contributing to the uniform heating of the battery cell 600 and preventing localized overheating. This is essential for maintaining the performance and extending the lifespan of the battery cell 600. The PI heating film has low thermal inertia, enabling rapid response to temperature changes and rapid heating. The PI heating film possesses good flexibility, conforming to the irregular surfaces of the battery pack and ensuring good contact between the heating film and the battery cell 600. The PI heating film exhibits good chemical stability, resisting reactions with chemicals within the battery pack, ensuring the safety and reliability of the heating system. The PI heating film has high abrasion resistance, resisting prolonged physical wear and extending its service life. The PI heating film has excellent electrical insulation properties, allowing for safe use in battery pack heating and reducing the risk of short circuits.

[0080] Combination Figure 1 and Figure 2 Along the direction perpendicular to the crossbeam 510, the projection of the second heating mechanism 300 is within the projection range of the connecting assembly 110 and the buffer assembly 120.

[0081] In this embodiment, the connecting component 110 and the buffer component 120 can better cover the second heating mechanism 300; when the potting compound is filled into the cavity 130, the potting compound can better cover the PI film 222 and the PI heating film, thereby indirectly improving the heat transfer efficiency of the potting compound; and when the potting compound is squeezed and deformed, the deformed potting compound can always cover the PI heating film and the PI film 222, thereby indirectly improving the buffering effect on the expanded battery cell 600.

[0082] See Figure 4 In some embodiments, the cell protection system further includes an insulation mechanism 700, which is disposed between the connection assembly 110 and the cell 600.

[0083] In this embodiment, the insulating mechanism 700 is an insulating film, which can be a polyethylene film, a polytetrachloroethylene film, or a polyester film, etc. The cavity 130 is disposed between the insulating film, the connecting assembly 110, and the PI film 222 of the first heating mechanism 200 away from the crossbeam 510. The adhesive is used to fix the PI film 222 and the insulating film.

[0084] In this embodiment, along the direction perpendicular to the crossbeam 510, the projection of the insulating mechanism 700 is within the projection range of the connecting assembly 110 and the buffer assembly 120.

[0085] By employing the insulation mechanism 700, current can be prevented from flowing to the crossbeam 510 after the cell 600 breaks, thereby preventing the entire battery pack from becoming energized and indirectly improving the safety of the battery pack.

[0086] Combination Figures 1 to 3 In this embodiment, the cell protection system also includes a connecting harness 400 and a connector 410. When multiple sets of buffer mechanism 100, first heating mechanism 200 and second heating mechanism 300 are provided, the connecting harness 400 is used to connect multiple sets of connecting harness 400, first heating mechanism 200 and second heating mechanism 300 in series, and electrically connect them to the battery pack through the connector 410, so that the battery pack can supply power to multiple sets of connecting harness 400, first heating mechanism 200 and second heating mechanism 300.

[0087] This application also provides a battery pack, including a frame 500 and a cell protection system of any of the above embodiments disposed on the frame 500.

[0088] The specific structure of the battery cell protection system has been described in detail in the above embodiments and will not be repeated here.

[0089] Combination Figure 1 and Figure 2 A crossbeam 510 is provided on the frame 500, and a filling hole 520 is provided on the crossbeam 510. One end of the filling hole 520 passes through the crossbeam 510, and the other end of the filling hole 520 is connected to the cavity 130.

[0090] In this embodiment, the crossbeam 510 can be disposed on the bottom wall of the frame 500 or between the opposite side walls of the frame 500. Multiple crossbeams 510 are provided. A buffer mechanism 100, a first heating mechanism 200, and a second heating mechanism 300 are provided on opposite sides of the crossbeam 510 near the middle of the frame 500. The inner side of the crossbeam 510 located at the edge of the frame 500 is provided with the buffer mechanism 100, the first heating mechanism 200, and the second heating mechanism 300. Two filling holes 520 are provided on the crossbeam 510 inside the frame 500, and one filling hole 520 is provided on the crossbeam 510 located at the edge of the frame 500. One end of the filling hole 520 penetrates the crossbeam 510 in a direction away from the bottom wall of the frame 500, and the other end of the filling hole 520 communicates with the filling hole 210 in a horizontal direction. When potting compound is filled, the potting compound can enter the filling hole 210 along the filling hole 520 and then enter the cavity 130 along the filling hole 210.

[0091] In this embodiment, an indicator arrow 530 is provided on the crossbeam 510 at a position adjacent to each filling hole 520. The indicator arrow 530 is used to indicate the filling direction of the filling hole 520.

[0092] In this application, by adopting the filling hole 520, the operator can fill the cavity 130 with potting compound through the filling hole 520 after installing the first heating mechanism 200, the buffer mechanism 100 and the second heating mechanism 300 onto the crossbeam 510. Thus, the potting compound is filled after the PI film 222, the connecting component 110 and the PI heating film have formed the cavity 130, which improves the fullness of the potting compound filling and indirectly improves the buffering effect of the potting compound.

[0093] This application also provides an electrical device, including a body and a battery cell protection system of any of the above embodiments disposed on the body.

[0094] The specific structure of the battery cell protection system has been described in detail in the above embodiments and will not be repeated here.

[0095] In this embodiment, the electrical equipment is a car; in other embodiments, the electrical equipment may also be other equipment that requires electrical connection of two battery cells across the beam.

[0096] The electrical equipment provided in this application embodiment, by setting up a cell protection system, can fix the first heating component 220 to the crossbeam 510 through the first mounting component 230, and fix the second heating component to the first heating component through the adhesive. At this time, by filling the elastic filler through the filling hole 520 on the crossbeam 510, the elastic filler can enter the cavity 130 along the filling hole 520 and the filling hole 210. When the elastic filler enters the cavity 130, the excess air in the cavity 130 can be discharged along the balance hole 111. When the cell 600 expands, the expanded cell 600 can squeeze the elastic filler and the adhesive, so that the elastic filler and the adhesive can buffer the expanded cell 600, thereby preventing the expanded cell 600 from directly contacting the crossbeam 510 and causing damage to the cell 600, thereby preventing the cell 600 from short-circuiting and thermal runaway.

[0097] Finally, it should be noted that other embodiments of this utility model will readily occur to those skilled in the art upon consideration of the specification and practice of the utility model disclosed herein. This utility model is intended to cover any variations, uses, or adaptations of this utility model that follow the general principles of this utility model and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this utility model is limited only by the appended claims.

Claims

1. A battery cell protection system, characterized in that, include: A buffer mechanism (100), the buffer mechanism (100) comprising: A connecting component (110) having a cavity (130) formed therein; A buffer assembly (120) is disposed within the cavity (130); The connecting assembly (110) is disposed between the crossbeam (510) and the battery cell (600) within the frame (500) of the battery pack; The connecting assembly (110) includes a frame (112) and a crossbar (113). The frame (112) is disposed between the crossbeam (510) and the battery cell (600). The top of the frame (112) is open. The crossbar (113) is disposed inside the opening of the frame (112) to form a balance hole (111) between the crossbar (113) and the inner wall of the frame (112).

2. The cell protection system according to claim 1, characterized in that, The buffer assembly (120) includes an elastic filler for filling the cavity (130).

3. The cell protection system according to claim 1, characterized in that, The connecting component (110) is an adhesive component used to attach the crossbeam (510) and the battery cell (600).

4. The cell protection system according to any one of claims 1-3, characterized in that, The connecting component (110) is provided with at least one balancing hole (111).

5. The cell protection system according to any one of claims 1-3, characterized in that, It also includes a first heating mechanism (200) for being disposed between the crossbeam (510) and the connecting assembly (110), the first heating mechanism for heating the crossbeam (510).

6. The cell protection system according to claim 5, characterized in that, The first heating mechanism (200) is provided with a filling hole (210), one end of the filling hole (210) is provided through the first heating mechanism (200), and the other end of the filling hole (210) is connected to the cavity (130).

7. The cell protection system according to claim 5, characterized in that, The first heating mechanism (200) includes: A first heating element (220) is used to heat the crossbeam (510); A first mounting component (230) is disposed between the first heating component (220) and the crossbeam (510), and the first mounting component (230) is used to fix the first heating component (220) to the crossbeam (510).

8. The cell protection system according to any one of claims 1-3, characterized in that, It also includes a second heating mechanism (300) for being disposed between the connecting assembly (110) and the battery cell (600), and the second heating mechanism (300) is used to heat the battery cell (600).

9. The cell protection system according to claim 8, characterized in that, Along a direction perpendicular to the crossbeam (510), the projection of the second heating mechanism (300) is within the projection range of the connecting assembly (110) and the buffer assembly (120).

10. The cell protection system according to any one of claims 1-3, characterized in that, It also includes an insulation mechanism (700) for being disposed between the connection assembly (110) and the battery cell (600).

11. A battery pack, characterized in that, It includes a frame (500) and a cell protection system as described in any one of claims 1-10 disposed on the frame (500).

12. The battery pack according to claim 11, characterized in that, A crossbeam (510) is provided on the frame (500), and a filling hole (520) is provided on the crossbeam (510). One end of the filling hole (520) passes through the crossbeam (510), and the other end of the filling hole (520) communicates with the cavity (130).

13. An electrical appliance, characterized in that, It includes a housing and a cell protection system as described in any one of claims 1-10, which is disposed on the housing.

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