Battery pack and electric device

Abstract

The invention relates to a battery pack and a power utilization device, and relates to the technical field of batteries, the battery pack comprises a box body, single batteries and an exhaust assembly; the box body is provided with a first containing cavity and a second containing cavity. The single battery is positioned in the first accommodating cavity and comprises an anti-explosion valve; the exhaust assembly is provided with an exhaust channel, the exhaust channel is provided with a first end and a second end, the first end is opposite to the anti-explosion valve, the second end is located in the second containing cavity, and the exhaust channel is used for guiding the conductive particles exhausted by the anti-explosion valve into the second containing cavity when the anti-explosion valve is damaged. The exhaust assembly is arranged to collect the conductive particles when the explosion-proof valve is opened, so that the problem of high-voltage short circuit caused by direct ejection of the conductive particles is avoided, and the safety and reliability of the battery pack are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery pack and an electrical device. Background Technology

[0002] When a power battery experiences thermal runaway, a high-voltage short circuit can easily occur after the valve of a single cell is opened, causing surrounding single cells or battery modules to experience thermal runaway again. At the same time, due to the excessively high temperature of the single cell during thermal runaway, the surrounding single cells heat up rapidly, causing the entire battery pack to spread and runaway, making it impossible to accurately cool the battery modules and single cells inside the battery pack. Summary of the Invention

[0003] This application provides a battery pack and an electrical device to at least partially solve the technical problem that short circuits easily occur when a single cell experiences thermal runaway, leading to thermal runaway of surrounding cells.

[0004] To achieve the above objectives, according to a first aspect of this application, this application provides a battery pack, comprising: The housing has a first receiving cavity and a second receiving cavity; A single battery cell is located in the first receiving cavity, and the single battery cell includes an explosion-proof valve; The exhaust assembly has an exhaust channel with a first end and a second end. The first end is disposed opposite to the explosion-proof valve, and the second end is located in the second receiving cavity. The exhaust channel is used to guide the conductive particles discharged by the explosion-proof valve into the second receiving cavity when the explosion-proof valve is damaged.

[0005] In some embodiments, the exhaust assembly includes a one-way valve disposed at a first end, the one-way valve being used to control the opening and closing of the exhaust passage.

[0006] In some embodiments, the second receiving cavity includes a first cavity and a second cavity, and the exhaust assembly is in communication with the first cavity; The battery pack includes a liquid cooling assembly having a first flow channel having a third end and a fourth end, the third end being connected to a first receiving cavity and the fourth end being connected to a second cavity.

[0007] In some embodiments, the liquid cooling assembly includes an inlet pipe and an outlet pipe, which are spaced apart in a first direction, and each of the inlet pipe and the outlet pipe has a first flow channel.

[0008] In some embodiments, the liquid cooling assembly includes a sensor, a temperature sensor, and a first shut-off valve. The sensor is electrically connected to the temperature sensor and the first shut-off valve, respectively. The inlet pipe is provided with the first shut-off valve, which is used to control the opening and closing of the first flow channel of the inlet pipe.

[0009] In some embodiments, the liquid cooling assembly includes a second shut-off valve, the sensor is electrically connected to the temperature sensor and the second shut-off valve respectively, and the liquid outlet pipe is provided with the second shut-off valve, which is used to control the opening and closing of the first flow channel of the liquid outlet pipe.

[0010] In some embodiments, the housing includes a beam located within a first receiving cavity, the beam having a second flow channel communicating with the first receiving cavity, and the second flow channel communicating with the first flow channel via a third end.

[0011] In some embodiments, the beam has a drain port and a liquid inlet, and the second guide channel is connected to the first receiving cavity through the drain port and the liquid inlet, respectively.

[0012] In some embodiments, the beam includes a partition located within a second flow channel, which divides the second flow channel into multiple sub-channels. Some of the sub-channels have inlets on their sidewalls, and the remaining sub-channels have outlets on their sidewalls.

[0013] According to a second aspect of this application, this application provides an electrical device including the aforementioned battery pack.

[0014] This application provides a battery pack, including a housing, individual batteries, and a venting assembly. The housing has a first receiving cavity and a second receiving cavity. The individual batteries are located in the first receiving cavity and include an explosion-proof valve. The venting assembly has a venting channel with a first end and a second end. The first end is positioned opposite the explosion-proof valve, and the second end is located in the second receiving cavity. The venting channel is used to guide conductive particles discharged from the explosion-proof valve into the second receiving cavity when the explosion-proof valve is damaged. This application improves the safety and reliability of the battery pack by using a venting assembly to collect conductive particles when the explosion-proof valve is opened, thereby avoiding high-voltage short circuits caused by direct ejection of conductive particles.

[0015] The electrical device in this application includes the battery pack described above. Therefore, the electrical device can have all the technical features and beneficial effects of the battery pack described above, which will not be repeated here.

[0016] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0018] Figure 1 This is a schematic diagram of the structure of the battery pack provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of the structure of a battery pack provided in yet another exemplary embodiment of this application; Figure 3 yes Figure 2 AA section view; Figure 4 yes Figure 2 BB section view; Figure 5 This is a partial structural diagram of the battery pack provided in an exemplary embodiment of this application; Figure 6 This is a cross-sectional view of the one-way valve provided in an exemplary embodiment of this application; Figure 7 This is a schematic diagram of the structure of the first shut-off valve provided in an exemplary embodiment of this application; Figure 8 yes Figure 7 CC section view.

[0019] Explanation of reference numerals in the attached figures: 1. Housing; 2. Single battery cell; 3. Exhaust assembly; 4. Liquid cooling assembly; 10. First receiving cavity; 11. Second receiving cavity; 12. Beam; 20. Explosion-proof valve; 30. Exhaust channel; 31. One-way valve; 40. First flow guide channel; 41. Liquid inlet pipe; 42. Liquid outlet pipe; 44. Temperature sensor; 45. First shut-off valve; 110. First chamber; 111. Second chamber; 112. Divider plate; 120. Second flow guide channel; 121. Drain port; 122. Liquid inlet; 123. Partition plate; 124. Sub-flow channel; 300. First end; 301. Second end; 310. Elastic element; 311. Valve; 400. Third end; 401. Fourth end; 450. Valve stem; 451. Ball valve body; 452. Valve core; X, First direction; Y, Second direction. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0021] The applicant noted that when a power battery experiences thermal runaway, a high-voltage short circuit can easily occur after the valve of a single cell opens, causing surrounding cells or the battery module to experience further thermal runaway. Simultaneously, the excessively high temperature of a single cell during thermal runaway causes surrounding cells to heat up rapidly, leading to a propagation of runaway throughout the entire battery pack. Precise cooling of the battery modules and individual cells within the battery pack is impossible. Currently, high-temperature resistant material is typically applied to the aluminum bar area on the CCS (Cells Contact System) to prevent conductive particles ejected from individual cells from conducting with the module. Thermal insulation pads are also used on the individual cells themselves or between individual cells to prevent the propagation of thermal runaway. However, due to structural limitations, high-temperature resistant material cannot be applied to certain locations, such as mounting points. This reduces the probability but cannot completely eliminate short circuits.

[0022] In view of this, this application provides a battery pack including a housing 1, individual battery cells 2, and an exhaust assembly 3. The housing 1 has a first receiving cavity 10 and a second receiving cavity 11. The individual battery cells 2 are located in the first receiving cavity 10 and include an explosion-proof valve 20. The exhaust assembly 3 has an exhaust channel 30 with a first end 300 and a second end 301. The first end 300 is disposed opposite to the explosion-proof valve 20, and the second end 301 is located in the second receiving cavity 11. The exhaust channel 30 is used to guide conductive particles discharged from the explosion-proof valve 20 into the second receiving cavity 11 when the explosion-proof valve 20 is damaged. By setting the exhaust assembly 3 to collect conductive particles when the explosion-proof valve 20 is opened, the high-voltage short circuit problem caused by the direct ejection of conductive particles is avoided, thereby improving the safety and reliability of the battery pack.

[0023] The battery pack and power supply device of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0024] Reference Figure 1 , Figure 2 and Figure 3 , Figure 1 This is a schematic diagram of the structure of the battery pack provided in an exemplary embodiment of this application. Figure 2 This is a schematic diagram of the structure of a battery pack provided in another exemplary embodiment of this application. Figure 3 yes Figure 2 A cross-sectional view (AA) shows that this application provides a battery pack, including a housing 1, individual battery cells 2, and an exhaust assembly 3; the housing 1 has a first receiving cavity 10 and a second receiving cavity 11; the individual battery cells 2 are located in the first receiving cavity 10, and each individual battery cell 2 includes an explosion-proof valve 20, as shown in the figure. Figure 5 , Figure 5This is a partial structural diagram of the battery pack provided in an exemplary embodiment of this application. The explosion-proof valve 20 is used to control the pressure relief of the individual battery cell 2 in case of thermal runaway. The exhaust assembly 3 has an exhaust channel 30, which has a first end 300 and a second end 301. The first end 300 is disposed opposite to the explosion-proof valve 20, and the second end 301 is located in the second receiving cavity 11. The exhaust channel 30 is used to guide the conductive particles discharged by the explosion-proof valve 20 into the second receiving cavity 11 when the explosion-proof valve 20 is damaged. When the individual battery cell 2 experiences thermal runaway, its internal pressure and temperature rise sharply. At this time, the explosion-proof valve 20 is damaged by the high-temperature and high-pressure gas, thereby releasing the internal pressure and realizing the pressure relief function, preventing the individual battery cell 2 from exploding due to excessive pressure and other more serious safety accidents. At the same time, after the explosion-proof valve 20 is opened, the gas containing conductive particles discharged by it can be guided into the second receiving cavity 11 through the corresponding exhaust channel 30, thereby preventing the conductive particles from causing multiple individual batteries 2 to conduct and form a high-voltage short circuit, thereby improving the safety and reliability of the battery pack.

[0025] In some embodiments, the exhaust assembly 3 includes a one-way valve 31 disposed at the first end 300, and the one-way valve 31 is used to control the opening and closing of the exhaust passage 30. (Refer to...) Figure 6 , Figure 6 This is a cross-sectional view of a one-way valve provided in an exemplary embodiment of this application. The one-way valve 31 includes an elastic element 310 and a valve 311. When the elastic element 310 is in a pre-compressed state, a pre-tightening force is applied to the valve 311, pushing the valve 311 to tightly fit against the first end 300 of the exhaust channel 30, so that the exhaust channel 30 is in a closed state, preventing the medium in the second receiving cavity 11, such as conductive particles, from flowing back into the first receiving cavity 10. When the single cell 2 thermally runs away, the explosion-proof valve 20 opens and releases high-temperature and high-pressure gas. The high-temperature and high-pressure gas in the single cell rapidly impacts the valve 311, generating positive pressure. If this pressure is greater than the pre-tightening force of the elastic element 310, the valve 311 overcomes the elastic force of the elastic element 310 and moves towards the side of the elastic element 310, so that the exhaust channel 30 is connected to the explosion-proof hole where the explosion-proof valve 20 is located. The high-pressure gas containing conductive particles flows along the exhaust channel 30 from the first end 300 to the second end 301, and finally enters the second receiving cavity 11. When the gas pressure discharged from the explosion-proof valve 20 drops below the elastic force of the elastic element 310, the elastic element 310 pushes the valve 311 to reset, re-sealing the first end 300, thus cutting off the exhaust channel 30 and preventing the medium in the second receiving cavity 11 from back-permeating into the first receiving cavity 10, ensuring the sealing of the first receiving cavity 10. By setting a one-way valve 31, only the high-pressure gas discharged from the explosion-proof valve 20 and the conductive particles it carries are allowed to flow into the second receiving cavity 11 in one direction, avoiding high-pressure short circuits. In addition, the one-way valve 31 can prevent external impurities and conductive particles in the second receiving cavity 11 from flowing back, ensuring the sealing of the individual battery cell 2, thereby improving the safety and reliability of the battery pack.

[0026] In some embodiments, refer to Figure 2 The second receiving cavity 11 includes a first cavity 110 and a second cavity 111, with the exhaust assembly 3 connected to the first cavity 110. The battery pack includes a liquid cooling assembly 4, which has a first flow channel 40 with a third end 400 and a fourth end 401. The third end 400 is connected to the first receiving cavity 10, and the fourth end 401 is connected to the second cavity 111. In this configuration, the first cavity 110 is used to collect conductive particles, and the second cavity 111 is used to store the submerged coolant. The first cavity 110 and the second cavity 111 are separated by a partition plate 112. By setting the partition plate 112, conductive particles in the first cavity 110 can be prevented from escaping and contaminating the coolant, thereby ensuring the electrical insulation of the coolant and preventing the risk of short circuits caused by conductive particles during liquid cooling circulation. Furthermore, during maintenance, conductive particles can be cleaned and the coolant maintained separately, reducing maintenance complexity.

[0027] In some embodiments, refer to Figure 4 , Figure 4 yes Figure 2 According to the BB cross-sectional view, the liquid cooling assembly 4 includes an inlet pipe 41 and an outlet pipe 42, which are spaced apart in the first direction X. Each of the inlet pipe 41 and outlet pipe 42 has a first flow channel 40. The first flow channel 40 of the inlet pipe 41 is responsible for transporting the coolant in the second chamber 111 sequentially through the fourth end 401 and the third end 400 of the first flow channel 40 to the first receiving chamber 10, achieving precise cooling. After cooling is completed, the first flow channel 40 of the outlet pipe 42 returns the heat-absorbing coolant to the second chamber 111 sequentially through the first receiving chamber 10, the third end 400, and the fourth end 401. Because the inlet pipe 41 and outlet pipe 42 are spaced apart in the first direction X, they form independent transport and return circulation paths, preventing coolants of different temperatures from mixing in the first flow channel 40, reducing heat exchange losses, and improving cooling efficiency.

[0028] In some embodiments, refer to Figure 2The liquid cooling assembly 4 includes a sensor, a temperature sensor 44, and a first shut-off valve 45. The sensor is electrically connected to both the temperature sensor 44 and the first shut-off valve 45. The inlet pipe 41 is equipped with the first shut-off valve 45, which controls the opening and closing of the first flow channel 40 of the inlet pipe 41. The temperature sensor 44 monitors the temperature in real time and transmits the signal to the sensor. When the sensor detects an abnormal temperature, it triggers the first shut-off valve 45 to open, thus opening the first flow channel 40 of the inlet pipe 41. The immersion coolant in the second chamber 111 is then transported to the first receiving chamber 10 through the first flow channel 40 to cool the individual battery cells 2. After the temperature of the individual battery cells 2 returns to normal, the sensor controls the first shut-off valve 45 to close, stopping the supply of coolant to the first receiving chamber 10. This configuration, by rapidly opening and closing the first shut-off valve 45 to accurately respond to thermal runaway, improves cooling efficiency and reduces the occurrence of thermal runaway.

[0029] In some embodiments, refer to Figure 7 and Figure 8 , Figure 7 This is a schematic diagram of the structure of the first shut-off valve provided in an exemplary embodiment of this application. Figure 8 yes Figure 7 According to the CC cross-sectional view, the first shut-off valve 45 includes a valve stem 450, a spherical valve body 451, and a valve core 452. The valve stem 450 is connected to an external drive to transmit power. The spherical valve body 451 is used to provide a sealed cavity for the movement of the valve core 452. The two sides of the spherical valve body 451 are connected to the first flow channel 40. The contact surfaces of the spherical valve body 451 and the valve core 452 form an annular seal. When the temperature sensor 44 detects an abnormal signal, it triggers the external drive to open and drive the valve stem 450 to move upward. Specifically, when the temperature sensor 44 detects an abnormal signal, the gear transmission of the valve stem 450 is controlled by a program to drive the valve core 452 to lift and disengage from the sealing surface, thereby opening the first flow channel 40 so that the coolant flows into the first receiving cavity 10 to cool the single cell 2.

[0030] In some embodiments, the liquid cooling assembly 4 includes a second shut-off valve (not shown). A sensor is electrically connected to both the temperature sensor 44 and the second shut-off valve. The outlet pipe 42 is equipped with the second shut-off valve, which controls the opening and closing of the first flow channel 40 of the outlet pipe 42. The temperature sensor 44 monitors the temperature and transmits a signal to the sensor. When the sensor detects that the temperature has returned to normal, it triggers the second shut-off valve to open, thus opening the first flow channel 40 of the outlet pipe 42. The cooled liquid, after absorbing heat, flows back from the first receiving cavity 10 to the second cavity 111 through the first flow channel 40. After the return flow is complete, the sensor controls the second shut-off valve to close, blocking the reverse flow. This configuration ensures that the coolant is promptly recovered after cooling, preventing residual liquid from affecting the cell insulation or causing corrosion.

[0031] In some embodiments, the second shut-off valve includes a valve stem, a ball valve body, and a valve core. The valve stem is connected to an external drive to transmit power. The ball valve body is used to provide a sealed cavity for the movement of the valve core. The two sides of the ball valve body are connected to a first flow channel. The contact surfaces of the ball valve body and the valve core form an annular seal. When the temperature sensor detects an abnormal signal, it triggers the external drive to open and drive the valve stem to move upward. Specifically, when the temperature sensor 44 detects an abnormal signal, the gear transmission of the valve stem is controlled by a program to drive the valve core to lift and disengage from the sealing surface, thereby opening the first flow channel 40 so that the coolant flows back from the first receiving cavity 10 along the outlet pipe 42 to the second cavity 111.

[0032] In some embodiments, refer to Figure 4 The box body 1 includes a beam 12 located within a first receiving cavity 10. The beam 12 has a second flow channel 120 communicating with the first receiving cavity 10. The second flow channel 120 is connected to the first flow channel 10 via a third end 400. (Refer to...) Figure 2 Individual cells 2 are spaced apart along the second direction Y. A beam 12 is positioned between adjacent individual cells 2 along the second direction Y. At least a portion of the inlet pipe 41 and outlet pipe 42 of the liquid cooling assembly 4 passes through the beam 12, such that the second flow channel 120 of the beam 12 is connected to the first flow channel 40 of the liquid cooling assembly 4 via the third end 400. Simultaneously, the second flow channel 120 is directly connected to the first receiving cavity 10. When the first shut-off valve 45 is opened, coolant enters the second flow channel 120 of the beam 12 from the first flow channel 40 of the inlet pipe 41 through the third end 400. Because the beam 12 is located between adjacent individual cells 2, it can directly guide the coolant to the surface of the individual cells 2 on both sides and their surrounding areas, achieving precise cooling of the individual cells 2. After cooling is completed, the coolant flows back through the second flow channel 120 and merges into the first flow channel 40 of the outlet pipe 42 via the third end 400 to complete the circulation. With this configuration, on the one hand, the beam 12 serves as a supporting structure between adjacent individual cells 2, which can enhance the fixation stability of the individual cells 2 and improve the overall structural strength of the battery pack; on the other hand, the beam 12 is positioned between adjacent individual cells 2, and the second flow channel 120 can directly deliver the coolant to the vicinity of the surface of the individual cells 2, shortening the coolant's action path, improving the cooling efficiency during thermal runaway of the battery pack, and reducing the transfer of heat between adjacent individual cells 2.

[0033] In some embodiments, refer to Figure 4The beam 12 has a drain port 121 and a liquid inlet 122. A second flow channel 120 communicates with the first receiving cavity 10 through both the drain port 121 and the liquid inlet 122. Specifically, the beam 12 has multiple drain ports 121 arranged at intervals to ensure that the submerged coolant can be quickly delivered to the vicinity of the surface of the individual battery cell 2. Similarly, the beam 122 has multiple liquid inlets arranged at intervals to ensure that the submerged coolant can be quickly delivered to the second cavity 111 after the second shut-off valve is opened.

[0034] In some embodiments, refer to Figure 4 The beam 12 includes a partition 123 located within the second flow channel 120, dividing the second flow channel 120 into multiple sub-channels 124. Some sub-channels 124 have inlets 122 on their sidewalls, while the remaining sub-channels 124 have outlets 121 on their sidewalls. Some sub-channels 124 serve as inlet sub-channels 124, with their inlets 122 connected to the first receiving cavity 10, used to deliver coolant to the first receiving cavity 10 via inlet pipe 41, thereby removing heat generated by the individual battery cells 2. The remaining sub-channels 124 serve as outlet sub-channels 124, with their outlets 121 connected to the first receiving cavity 10, used to deliver coolant to the second receiving cavity 11 via outlet pipe 42. This configuration serves two purposes: firstly, the sub-channels 124 separated by the partition 123 separate the liquid inlet and outlet functions, preventing the mixing of hot and cold coolants and improving heat exchange efficiency; secondly, the partition 123 enhances the structural strength of the beam 12, while also serving as a guide and support.

[0035] According to a second aspect of this application, an electrical device is provided, including the aforementioned battery pack. Therefore, the electrical device can possess all the technical features and beneficial effects of the aforementioned battery pack, which will not be repeated here. As an example, the electrical device can be, for instance, an electric vehicle, i.e., a vehicle powered at least partially by electrical energy. In this embodiment, the battery can be a practically dynamite battery.

[0036] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0037] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0038] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0039] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A battery pack, characterized in that, include: The housing has a first receiving cavity and a second receiving cavity; A single battery cell is located within the first accommodating cavity, and the single battery cell includes an explosion-proof valve; An exhaust assembly having an exhaust channel having a first end and a second end, the first end being disposed opposite to the explosion-proof valve, and the second end being located within a second receiving cavity, the exhaust channel being used to guide conductive particles discharged by the explosion-proof valve into the second receiving cavity when the explosion-proof valve is damaged.

2. The battery pack according to claim 1, characterized in that, The exhaust assembly includes a one-way valve, which is disposed at the first end and is used to control the opening and closing of the exhaust passage.

3. The battery pack according to claim 1, characterized in that, The second receiving cavity includes a first cavity and a second cavity, and the exhaust assembly is in communication with the first cavity; The battery pack includes a liquid cooling assembly with a first flow channel having a third end and a fourth end. The third end is connected to the first receiving cavity, and the fourth end is connected to the second cavity.

4. The battery pack according to claim 3, characterized in that, The liquid cooling assembly includes an inlet pipe and an outlet pipe, which are spaced apart in a first direction, and each of the inlet pipe and the outlet pipe has the first flow guiding channel.

5. The battery pack according to claim 4, characterized in that, The liquid cooling assembly includes a sensor, a temperature sensor, and a first shut-off valve. The sensor is electrically connected to the temperature sensor and the first shut-off valve, respectively. The liquid inlet pipe is provided with the first shut-off valve, which is used to control the opening and closing of the first flow channel of the liquid inlet pipe.

6. The battery pack according to claim 5, characterized in that, The liquid cooling assembly includes a second shut-off valve. The sensor is electrically connected to the temperature sensor and the second shut-off valve respectively. The liquid outlet pipe is provided with the second shut-off valve, which is used to control the opening and closing of the first flow channel of the liquid outlet pipe.

7. The battery pack according to claim 3, characterized in that, The box body includes a beam body located within the first accommodating cavity. The beam body has a second flow channel, which communicates with the first accommodating cavity. The second flow channel is connected to the first flow channel through the third end.

8. The battery pack according to claim 7, characterized in that, The beam has a drain port and a liquid inlet, and the second guide channel is connected to the first receiving cavity through the drain port and the liquid inlet.

9. The battery pack according to claim 8, characterized in that, The beam includes a partition located within the second flow channel, which divides the second flow channel into multiple sub-channels. The sidewalls of some of the sub-channels are provided with liquid inlets, and the sidewalls of the remaining sub-channels are provided with liquid outlets.

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 1 to 9.

Images