A battery pack and an electrical device

Abstract

This utility model provides a battery pack and an electrical device. The battery pack includes a cell module and a housing. The housing includes an inner shell and an outer shell. The cell module is disposed within the inner shell. The inner shell and the outer shell are spaced apart, and a cooling cavity is formed between the inner shell and the outer shell to contain coolant. At least part of the cooling cavity is arranged around the cell module. By using this electrical device, a cooling cavity is formed between the inner shell and the outer shell in the housing, and the cooling cavity is arranged around the cell module. Therefore, the cooling cavity can form cooling paths in multiple directions around the cell module, thereby achieving heat dissipation from the cell module in multiple directions. Compared with the traditional single-sided cooling base plate, the use of cooling paths in multiple directions can significantly increase the heat dissipation area of ​​the battery pack, reduce the temperature difference between the cells, thereby meeting the heat dissipation requirements of the battery pack, avoiding affecting the working performance of the battery pack, and ensuring the performance of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically to a battery pack and an electrical device. Background Technology

[0002] In modern battery technology, the performance and safety of a battery pack are significantly affected by the operating temperature of the battery cells. Cells generate heat during charging and discharging, and effective heat management is crucial for maintaining the performance, safety, and lifespan of the battery pack. The operating temperature of the battery cells within the pack has a decisive impact on the pack's safety, efficiency, and lifespan.

[0003] Mainstream liquid-cooled battery packs often use a liquid-cooled base plate solution to dissipate heat from the cells. The cells rely on a single-sided cooling plate for heat dissipation, resulting in a small heat dissipation area and low heat dissipation efficiency. Excessive temperature inside the battery pack increases the risk of thermal runaway, and the temperature difference between cells cannot be guaranteed, affecting the continuous working performance of the battery pack, reducing its service life, and easily causing thermal runaway accidents. Utility Model Content

[0004] The embodiments of this utility model provide a battery pack and electrical equipment that can improve the technical problem of high internal temperature of the battery pack and inability to guarantee the temperature difference between the cells, thereby affecting the service life of the battery pack.

[0005] In a first aspect, embodiments of the present invention provide a battery pack, comprising:

[0006] Battery cell module;

[0007] The housing includes an inner shell and an outer shell, the battery cell module is disposed within the inner shell, the inner shell and the outer shell are spaced apart, and a cooling cavity is formed between the inner shell and the outer shell to contain coolant, at least a portion of the cooling cavity is arranged around the battery cell module.

[0008] In one embodiment, the cooling cavity includes a first cavity and a second cavity, which are in communication with each other. The first cavity is located between the side wall of the inner shell and the side wall of the outer shell, and the second cavity is located between the bottom wall of the inner shell and the bottom wall of the outer shell.

[0009] In one embodiment, a disassembly structure is provided between the cell module and the inner housing along the height direction of the battery pack for locking or unlocking the cell module.

[0010] In one embodiment, the disassembly structure includes a mounting base, a first connector, and a second connector. The mounting base is mounted on the battery cell module, the first connector is connected to the side of the mounting base opposite to the battery cell module, and the second connector is movably connected to the inner housing for locking or unlocking the first connector.

[0011] In one embodiment, at least two of the first connectors are located on opposite sides of the mounting base.

[0012] In one embodiment, the mounting base includes a support portion and a cutout portion, the support portion being arranged to surround the cutout portion, and the support portion being connected to the battery cell module.

[0013] In one embodiment, the support portion includes two opposing first portions and two opposing second portions, and the disassembly structure is disposed between the first portions and the inner housing, wherein the thickness of the first portions is greater than the thickness of the second portions.

[0014] In one embodiment, a pop-out structure is provided between the disassembly structure and the inner housing along the height direction of the battery pack for popping out the mounting base.

[0015] In one embodiment, the pop-out structure includes a base and an elastic element. The base is fixed inside the inner housing and is connected to the disassembly structure via the elastic element to pop out the battery cell module after unlocking it.

[0016] In one embodiment, the first connector has a first fastening portion on the side near the second connector, and the second connector has a second fastening portion on the side near the first connector;

[0017] When the second connector moves to the first position, the first fastening part and the second fastening part fasten together, and the elastic member is in a compressed state;

[0018] When the second connector moves to the second position, the first fastening part separates from the second fastening part, and the elastic member can push the battery cell module.

[0019] In one embodiment, the direction of movement of the second connector is perpendicular to the direction of movement of the elastic member.

[0020] In one embodiment, the battery module includes multiple battery cells and multiple buffer layers, with the buffer layers located between two adjacent battery cells.

[0021] In one embodiment, the battery cell module is provided in multiple ways, and the inner housing is provided with multiple partitions, which divide the internal space of the inner housing into multiple sub-cavities, and each sub-cavity is equipped with the battery cell module.

[0022] In one embodiment, the outer casing is provided with a liquid inlet and a liquid outlet, both of which are connected to the cooling cavity, and the liquid inlet and the liquid outlet are located on opposite sides of the outer casing.

[0023] Secondly, embodiments of this utility model provide an electrical device that includes the battery pack.

[0024] The beneficial effects of the embodiments of this utility model are as follows:

[0025] A cooling cavity is formed between the inner and outer shells of the battery pack. The cooling cavity contains coolant and is arranged around the battery cell module. Therefore, the cooling cavity can form cooling paths in multiple directions around the battery cell module, thereby achieving heat dissipation from multiple directions. Compared with the traditional single-sided cooling base plate, the use of cooling paths in multiple directions can significantly increase the heat dissipation area of ​​the battery pack, reduce the temperature difference between the cells, and thus meet the heat dissipation requirements of the battery pack, avoid affecting the working performance of the battery pack, and ensure the performance of the battery pack. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the battery pack provided in an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 The cross-sectional view of the battery pack shown;

[0029] Figure 3 yes Figure 1 The diagram shows the disassembly and ejection mechanisms in the battery pack.

[0030] Figure 4 yes Figure 1 The image shows a longitudinal cross-sectional view of the battery pack.

[0031] Figure 5 It is at Figure 4 A magnified view of a section at point A in the middle;

[0032] Figure 6 yes Figure 1 The diagram shows the structure of the buffer layer in the battery pack.

[0033] Marked in the image:

[0034] 1. Battery pack;

[0035] 100. Battery cell module;

[0036] 200. Housing; 201. Inner shell; 202. Outer shell; 203. Cooling chamber; 2031. First chamber; 2032. Second chamber; 204. Liquid inlet; 205. Liquid outlet;

[0037] 300. Disassembly structure; 301. Mounting base; 3011. Support part; 3012. Hollowed-out part; 3013. First part; 3014. Second part; 302. First connecting piece; 3021. First fastening part; 303. Second connecting piece; 3031. Second fastening part;

[0038] 400. Pop-out structure; 401. Base; 402. Elastic component;

[0039] 500, Buffer layer;

[0040] 600. Cover. Detailed Implementation

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model. In the present utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0042] Reference Figure 1 As shown, an embodiment of the present invention provides a battery pack 1, including a cell module 100 and a housing 200;

[0043] The housing 200 includes an inner housing 201 and an outer housing 202. The battery cell module 100 is disposed inside the inner housing 201. The inner housing 201 and the outer housing 202 are spaced apart, and a cooling cavity 203 is formed between the inner housing 201 and the outer housing 202 to contain coolant. At least a portion of the cooling cavity 203 is arranged around the battery cell module 100.

[0044] A cooling cavity 203 is formed between the inner shell 201 and the outer shell 202 in the housing 200. The cooling cavity 203 contains coolant and is arranged around the cell module 100. Therefore, the cooling cavity 203 can form cooling paths in multiple directions around the cell module 100, thereby achieving heat dissipation from the cell module 100 in multiple directions. Compared with the traditional single-sided cooling base plate, the use of cooling paths in multiple directions can significantly increase the heat dissipation area of ​​the battery pack 1, reduce the temperature difference between the cells, thereby meeting the heat dissipation requirements of the battery pack 1, avoiding affecting the working performance of the battery pack 1, and ensuring the performance of the battery pack 1.

[0045] It is understood that in this embodiment, the cooling cavity 203 is arranged around the battery cell module 100. Therefore, the cooling cavity 203 can form a loop in the circumference of the battery cell module 100. That is, the coolant contained in the cooling cavity 203 can flow along the length, width and height of the battery cell module 100 to achieve heat dissipation in multiple directions of the battery cell module 100.

[0046] It should also be noted that in this embodiment, the housing 200 adopts an aluminum housing frame, which can provide effective support for the battery cell module 100.

[0047] In some embodiments, refer to Figure 2 As shown, the cooling cavity 203 includes a first cavity 2031 and a second cavity 2032, which are interconnected. The first cavity 2031 is located between the side wall of the inner shell 201 and the side wall of the outer shell 202, and the second cavity 2032 is located between the bottom wall of the inner shell 201 and the bottom wall of the outer shell 202. Accordingly, coolant can flow on the side walls and bottom surface of the battery cell module 100, thereby increasing the heat dissipation area of ​​the battery cell module 100. Meanwhile, when the coolant flows in the first cavity 2031, it can flow along the side of the cell module 100, thereby absorbing the heat from the side wall of the cell module 100. When the coolant flows in the second cavity 2032, it can flow over the bottom surface of the cell module 100, thereby absorbing the heat from the bottom of the cell module 100. Therefore, the coolant can form multiple cooling paths along the three directions of the X-axis, Y-axis and Z-axis, and dissipate heat from the cell module 100 from multiple directions. Compared with heat dissipation in a single direction, heat dissipation in multiple directions is more efficient, making the heat dissipation of the cell module 100 more uniform.

[0048] In addition, since the cooling cavity 203 can make the heat dissipation of the cell module 100 more uniform, the temperature of the cell module 100 can be more accurately controlled within a suitable range, so that the battery pack 1 can work within the optimal temperature range and ensure the service life of the battery pack 1.

[0049] In practical use, the temperature difference between the battery cell modules 100 can be controlled within 2℃, which meets the heat dissipation requirements of the battery cell modules 100.

[0050] In some embodiments, refer to Figure 1 As shown, a disassembly structure 300 is provided between the cell module 100 and the inner casing 201 along the height direction of the battery pack 1 for locking or unlocking the cell module 100. In practical use, when the cell module 100 malfunctions, the disassembly structure 300 can quickly unlock the cell module 100, allowing it to be rapidly separated from the inner casing 201. This prevents heat, gas, or liquid caused by the malfunctioning cell module 100 from spreading to other parts of the battery pack 1, reducing the possibility of a chain reaction and thus improving the overall reliability of the battery pack 1.

[0051] Therefore, the disassembly structure 300 can effectively reduce the impact of runaway events on the entire battery pack 1, reduce the risk of the entire battery pack 1 being scrapped due to the runaway of a single cell module 100, and thus improve the overall reliability of the battery pack 1.

[0052] It should be further explained that since the disassembly structure 300 is located between the inner housing 201 and the cell module 100, there is a certain gap between the cell module 100 and the bottom wall of the inner housing 201. That is, the second cavity 2032 and the bottom wall of the cell module 100 are not in direct contact. The coolant in the second cavity 2032 is used to reduce the temperature between the cell module 100 and the bottom wall of the inner housing 201, thereby removing the temperature of the bottom wall of the cell module 100 and achieving the heat dissipation effect of the cell module 100.

[0053] In some embodiments, refer to Figure 1 and Figure 3 As shown, the disassembly structure 300 includes a mounting base 301, a first connector 302, and a second connector 303. The mounting base 301 is mounted on the cell module 100. The first connector 302 is connected to the side of the mounting base 301 facing away from the cell module 100. The second connector 303 is movably connected to the inner housing 201 for locking or unlocking the first connector 302. In this embodiment, the first connector 302 can be locked or unlocked by moving the second connector 303. The operation is simple and quick. This setting can greatly shorten the locking or unlocking time of the first connector 302. When the cell module 100 becomes uncontrollable, the rapid unlocking of the first connector 302 can quickly remove the uncontrollable cell module 100 from the battery pack 1, preventing it from affecting other normally functioning cell modules 100, thereby reducing the severity of the accident.

[0054] Furthermore, in some embodiments, reference is made to Figure 1 and Figure 3 As shown, at least two first connectors 302 are located on both sides of the mounting base 301. The arrangement of multiple connection points can distribute the stress points of the mounting base 301 and reduce the risk of damage to the mounting base 301 due to excessive stress at a single point.

[0055] It should also be noted that, in this embodiment, reference is made to... Figure 1 and Figure 3 As shown, there are four first connectors 302 and four second connectors 303. The four first connectors 302 are respectively located at the four corners of the mounting base 301, so that the mounting base 301 is evenly stressed. Furthermore, when it is necessary to lock the cell module 100, the four first connectors 302 can ensure that the cell module 100 is securely connected to the inner shell 201, preventing the cell module 100 from coming out under normal use and ensuring the working performance of the battery pack 1.

[0056] Understandably, referring to Figure 3 As shown, the mounting base 301 is configured as an annular base 401, which can reduce the contact area between the mounting base 301 and the battery cell module 100 and ensure the heat dissipation of the battery cell module 100.

[0057] In some embodiments, refer to Figure 1 and Figure 3 As shown, the mounting base 301 includes a support portion 3011 and a hollow portion 3012. The support portion 3011 is arranged to surround the hollow portion 3012, and the support portion 3011 is connected to the battery cell module 100. It can be understood that in this embodiment, the battery cell module 100 is connected to the support portion. The connection between the battery cell module 100 and the mounting base 301 is achieved through the support portion 3011, and the contact area between the battery cell module 100 and the mounting base 301 is reduced through the hollow portion 3012. This reduces the contact area between the mounting base 301 and the battery cell module 100 while ensuring the connection between them.

[0058] In some embodiments, the support portion 3011 includes two oppositely arranged first portions 3013 and two oppositely arranged second portions 3014, and the disassembly structure 300 is disposed between the first portions and the inner housing 201, wherein the thickness of the first portions is greater than the thickness of the second portions.

[0059] In some embodiments, refer to Figure 1 and Figure 3As shown, along the height direction of the battery pack 1, a pop-out structure 400 is provided between the disassembly structure 300 and the inner housing 201 for popping out the mounting base 301. In this embodiment, the pop-out structure 400 can quickly pop out the mounting base 301 along with the cell module 100 after the first connector 302 is unlocked, greatly reducing the time and labor intensity of manual disassembly. The pop-out structure 400 makes the process of removing and replacing the cell module 100 more efficient and faster. Especially when the cell module 100 malfunctions, quickly replacing the malfunctioning or damaged cell module 100 can avoid affecting other normally functioning cell modules 100, thereby reducing the severity of the accident.

[0060] In some embodiments, refer to Figure 1 and Figure 3 As shown, the pop-out structure 400 includes a base 401 and an elastic member 402. The base 401 is fixed inside the inner housing 201, and the base 401 is connected to the disassembly structure 300 via the elastic member 402 for popping out the battery cell module 100 after unlocking. Therefore, the elastic member 402 can quickly pop out the battery cell module 100 after the first connector 302 is unlocked, thereby reducing the time and labor intensity of manual disassembly of the battery cell module 100, thus significantly reducing the downtime of the battery pack 1 and improving the reliability of the battery pack 1 system.

[0061] In this embodiment, refer to Figure 1 and Figure 3 As shown, the elastic element 402 is configured as a spring.

[0062] In some embodiments, refer to Figure 4 and Figure 5 As shown, the first connector 302 has a first fastening part 3021 on the side near the second connector 303, and the second connector 303 has a second fastening part 3031 on the side near the first connector 302.

[0063] Reference Figure 4 and Figure 5 As shown, when the second connector 303 moves to the first position, the first latching part 3021 and the second latching part 3031 are latched together, and the elastic member 402 is in a compressed state. In this state, the battery module 100 is firmly locked in the inner housing 201 through the cooperation of the first connector 302 and the second connector 303, realizing a reliable locking function between the first connector 302 and the second connector 303, ensuring that the battery module 100 will not loosen or shift under normal working conditions.

[0064] Reference Figure 4 and Figure 5As shown, when the second connector 303 moves to the second position, the first latching part 3021 separates from the second latching part 3031, and the elastic member 402 can push the battery module 100. In this state, the first latching part 3021 separates from the second latching part 3031, the elastic member 402 releases energy, and pushes the battery module 100 out, which greatly improves the disassembly efficiency of the battery module 100.

[0065] Accordingly, the cooperation of the disassembly structure 300 and the pop-out structure 400 can quickly pop the cell module 100 out of the inner housing 201, thus enabling the out-of-control or faulty cell module 100 to be removed from the battery pack 1 in a short time, preventing it from affecting other normally functioning cell modules 100 and reducing the risk of the accident spreading.

[0066] In some embodiments, refer to Figure 4 and Figure 5 As shown, the moving direction of the second connector 303 is perpendicular to the moving direction of the elastic member 402. This arrangement allows for a more compact fit between the entire disassembly structure 300 and the pop-out structure 400. By staggering the moving direction of the second connector 303 and the moving direction of the elastic member 402, excessive space can be avoided in a single direction, and the second connector 303 can be prevented from interfering with the pop-out process of the elastic member 402, ensuring the smooth disassembly of the battery module.

[0067] It should also be noted that, in this embodiment, reference is made to... Figure 4 and Figure 5 As shown, the second connector 303 is configured as an electromagnetically driven slider. Therefore, when the cell module 100 malfunctions or experiences thermal runaway, it can provide feedback to the BMS module through the temperature and pressure sampling lines. In conjunction with the BMS module, it can trigger an electromagnetic release, causing the second connector 303 to move and unlock the first connector 302, thereby popping out the cell module 100.

[0068] In some embodiments, refer to Figure 1 and Figure 6As shown, the battery cell module 100 includes multiple battery cells and multiple buffer layers 500, with each buffer layer 500 located between adjacent battery cells. In this embodiment, the buffer layer 500 can absorb and disperse the heat generated by the battery cells during operation, reducing heat transfer between the battery cells. Therefore, it can effectively prevent localized overheating of the battery cells and reduce the risk of thermal runaway in the battery cell module 100. Simultaneously, in the event of runaway in the battery cell module 100, the buffer layer 500 can also absorb some heat and gas, and expand after absorbing heat to fill the gaps between the battery cells, reducing heat diffusion between the battery cells and preventing the accident from escalating. Furthermore, the buffer layer 500 can absorb vibrations and impacts generated by the battery cells during operation, reducing collisions between the battery cells and ensuring more uniform stress distribution in the battery cell module 100 during operation. This prevents the battery cells from deforming or being damaged due to mechanical stress, reducing the risk of short circuits and thermal runaway.

[0069] It should also be noted that, referring to Figure 1 and Figure 6 As shown, in this embodiment, the buffer layer 500 is a double-layer buffer layer 500. The inner layer is filled with graphite composite material, which can fill the gap between the battery cells after absorbing heat. The outer layer is wrapped with silicone fireproof adhesive, which provides flame-retardant and shock-resistant buffer function between adjacent battery cells.

[0070] In some embodiments, refer to Figure 1 As shown, multiple battery cell modules 100 are provided, and multiple partitions are provided inside the inner housing 201. The partitions divide the internal space of the inner housing 201 into multiple sub-cavities, each of which is equipped with a battery cell module 100. Each battery cell module 100 is installed individually in a sub-cavity and separated by partitions. In the event of a malfunction in a single battery cell module 100, the partitions can effectively isolate the malfunctioning battery cell module 100, preventing the diffusion of heat, gas, or liquid to the normally operating battery cell modules 100, thus preventing it from affecting other normally operating battery cell modules 100 and reducing the risk of the accident spreading.

[0071] In some embodiments, refer to Figure 1 As shown, the outer casing 202 is provided with a liquid inlet 204 and a liquid outlet 205. Both the liquid inlet 204 and the liquid outlet 205 are connected to the cooling cavity 203. The liquid inlet 204 and the liquid outlet 205 are located on opposite sides of the outer casing 202.

[0072] It is understood that, in this embodiment, reference is made to... Figure 1As shown, the outer casing 202 is provided with an inlet pipe and an outlet pipe on both sides. The inlet pipe is connected to the inlet port 204, and the outlet pipe is connected to the outlet port 205. The inlet port 204 and the outlet port 205 are located on opposite sides of the outer casing 202. This arrangement can ensure that the coolant has the longest flow path in the cooling cavity 203, thereby improving the cooling efficiency.

[0073] In this embodiment, refer to Figure 1 As shown, a cover is also connected to the housing 200 to ensure the safety of the battery cell module 100.

[0074] In summary, referring to Figures 1 to 6 As shown, in this embodiment, a cooling cavity 203 is formed between the outer shell 202 and the inner shell 201. Therefore, the cooling cavity 203 can form cooling paths in multiple directions and can contact the four sides and bottom of the cell module 100 to achieve multi-surface heat dissipation of the cell module 100. Compared with the traditional single-sided heat dissipation of liquid cooling plates, the cooling cavity in this embodiment can significantly increase the heat dissipation area of ​​the cell module 100, thereby reducing the temperature difference between cells, ensuring the heat dissipation efficiency of the battery pack 1, avoiding the impact on the working performance of the battery pack 1, and also reducing the probability of thermal runaway accident of the cell module 100.

[0075] Furthermore, since the cooling cavity 203 includes a first cavity 2031 and a second cavity 2032, the cross-arranged cooling paths can quickly remove the heat generated by the cell module 100 during operation, ensuring temperature uniformity throughout the cell module 100. This allows for even heat dissipation from all parts of the cell module 100, preventing localized overheating, reducing the probability of thermal runaway, avoiding impact on the continuous working performance of the battery pack 1, and preventing performance differences between cells.

[0076] Meanwhile, during normal operation of the battery pack 1, the first connector 302 and the second connector 303 are fastened together, which enables the cell module 100 to be securely connected to the inner shell 201, ensuring the normal operation of the battery pack 1. Furthermore, the first fastening part 3021 and the second fastening part 3031 ensure that the cell module 100 is securely connected to the inner shell 201 when the first connector 302 is in the locked state, preventing the cell module 100 from shifting or shaking, and ensuring the normal operation performance of the cell module 100.

[0077] When the cell module 100 experiences thermal runaway, the BMS module, in cooperation with the battery management system, can drive the second connector 303 to move out of alignment with the first connector 302. Furthermore, the elastic element 402 allows the cell module 100 to be ejected, making the removal and replacement of the cell module 100 more efficient and faster. This avoids affecting other normally functioning cell modules 100, thereby reducing the severity of the accident, preventing the entire battery pack 1 from malfunctioning, and preventing serious threats to equipment and personnel safety.

[0078] Secondly, embodiments of this utility model provide an electrical device including the aforementioned battery pack 1.

[0079] The exclusive right of this electrical equipment has all the technical features of the aforementioned battery pack 1:

[0080] A cooling cavity 203 is formed between the inner shell 201 and the outer shell 202 in the housing 200. The cooling cavity 203 contains coolant and is arranged around the cell module 100. Therefore, the cooling cavity 203 can form cooling paths in multiple directions around the cell module 100, thereby achieving heat dissipation from the cell module 100 in multiple directions. Compared with the traditional single-sided cooling base plate, the use of cooling paths in multiple directions can significantly increase the heat dissipation area of ​​the battery pack 1, reduce the temperature difference between the cells, thereby meeting the heat dissipation requirements of the battery pack 1, avoiding affecting the working performance of the battery pack 1, and ensuring the performance of the battery pack 1.

[0081] In summary, referring to Figures 1 to 6 As shown, in this embodiment, a cooling cavity 203 is formed between the outer shell 202 and the inner shell 201. Therefore, the cooling cavity 203 can provide cooling paths in multiple directions and can contact the four sides and bottom of the cell module 100 to achieve multi-surface heat dissipation of the cell module 100. Compared with the traditional single-sided heat dissipation of liquid cooling plates, the cooling cavity 203 in this embodiment can significantly increase the heat dissipation area of ​​the cell module 100, thereby reducing the temperature difference between cells, ensuring the heat dissipation efficiency of the battery pack 1, avoiding the impact on the working performance of the battery pack 1, and also reducing the probability of thermal runaway accidents in the cell module 100.

[0082] Furthermore, since the cooling cavity 203 includes a first cavity 2031 and a second cavity 2032, the cross-arranged cooling paths can quickly remove the heat generated by the cell module 100 during operation, ensuring temperature uniformity throughout the cell module 100. This allows for even heat dissipation from all parts of the cell module 100, preventing localized overheating, reducing the probability of thermal runaway, avoiding impact on the continuous working performance of the battery pack 1, and preventing performance differences between cells.

[0083] Meanwhile, during normal operation of the battery pack 1, the first connector 302 and the second connector 303 are fastened together, which enables the cell module 100 to be securely connected to the inner shell 201, ensuring the normal operation of the battery pack 1. Furthermore, the first fastening part 3021 and the second fastening part 3031 ensure that the cell module 100 is securely connected to the inner shell 201 when the first connector 302 is in the locked state, preventing the cell module 100 from shifting or shaking, and ensuring the normal operation performance of the cell module 100.

[0084] When the cell module 100 experiences thermal runaway, the BMS module can drive the second connector 303 to move out of alignment with the first connector 302. The elastic element 402 then pops the cell module 100 out, making the removal and replacement of the cell module 100 more efficient and faster. This avoids affecting other normally functioning cell modules 100, thereby reducing the severity of the accident, preventing the entire battery pack 1 from malfunctioning, and preventing serious threats to equipment and personnel safety.

[0085] The embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A battery pack, characterized by, include: Battery cell module; The housing includes an inner shell and an outer shell, the battery cell module is disposed within the inner shell, the inner shell and the outer shell are spaced apart, and a cooling cavity is formed between the inner shell and the outer shell to contain coolant, at least a portion of the cooling cavity is arranged around the battery cell module.

2. The battery pack of claim 1, wherein, The cooling cavity includes a first cavity and a second cavity, which are interconnected. The first cavity is located between the side wall of the inner shell and the side wall of the outer shell, and the second cavity is located between the bottom wall of the inner shell and the bottom wall of the outer shell.

3. The battery pack of claim 1, wherein, Along the height direction of the battery pack, a disassembly structure is provided between the cell module and the inner housing for locking or unlocking the cell module.

4. The battery pack of claim 3, wherein, The disassembly structure includes a mounting base, a first connector, and a second connector. The mounting base is mounted on the battery cell module. The first connector is connected to the side of the mounting base opposite to the battery cell module. The second connector is movably connected to the inner housing for locking or unlocking the first connector.

5. The battery pack of claim 4, wherein, At least two of the first connectors are located on opposite sides of the mounting base.

6. The battery pack of claim 4, wherein, The mounting base includes a support portion and a hollow portion. The support portion is arranged to surround the hollow portion and is connected to the battery cell module.

7. The battery pack of claim 6, wherein, The support includes two opposing first parts and two opposing second parts, and the disassembly structure is disposed between the first parts and the inner shell, wherein the thickness of the first parts is greater than the thickness of the second parts.

8. The battery pack of claim 4, wherein, Along the height direction of the battery pack, a pop-out structure is provided between the disassembly structure and the inner housing for popping out the mounting base.

9. The battery pack of claim 8, wherein, The pop-out structure includes a base and an elastic element. The base is fixed inside the inner housing and is connected to the disassembly structure via the elastic element to pop out the battery cell module after unlocking it.

10. The battery pack of claim 9, wherein, The first connector has a first fastening part on the side near the second connector, and the second connector has a second fastening part on the side near the first connector; When the second connector moves to the first position, the first fastening part and the second fastening part fasten together, and the elastic member is in a compressed state; When the second connector moves to the second position, the first fastening part separates from the second fastening part, and the elastic member can push the battery cell module.

11. The battery pack of claim 9, wherein, The direction of movement of the second connector is perpendicular to the direction of movement of the elastic element.

12. The battery pack of any one of claims 1-11, wherein, The battery cell module includes multiple battery cells and multiple buffer layers, with the buffer layers located between two adjacent battery cells.

13. The battery pack of any one of claims 1-11, wherein, The battery cell module is provided in multiple ways, and the inner shell is provided with multiple partitions. The partitions divide the internal space of the inner shell into multiple sub-cavities, and each sub-cavity is equipped with the battery cell module.

14. The battery pack of any one of claims 1-11, wherein, The outer casing is provided with a liquid inlet and a liquid outlet, both of which are connected to the cooling cavity. The liquid inlet and the liquid outlet are located on opposite sides of the outer casing.

15. An electrical device, characterized by Includes the battery pack as described in any one of claims 1-14.

Images