A battery pack and an electric device

Abstract

Embodiments of the present application provide a battery pack and an electric device. The battery pack has a first direction, a second direction and a third direction perpendicular to each other, and comprises: a box body having a receiving cavity; a battery pack arranged in the receiving cavity, the battery pack comprising a plurality of single batteries, the plurality of single batteries being distributed along the first direction, each single battery having two first surfaces arranged away along the third direction, and each first surface being provided with a pole and an explosion-proof valve; and a thermal management component comprising a flow channel pipe and a water storage pipe extending along the first direction, the flow channel pipe being in thermal conductive connection with the pole, the flow channel pipe being used for cooling medium flow, the water storage pipe being opposite to the explosion-proof valve, one end of the water storage pipe along the first direction being blocked, and the other end of the water storage pipe along the first direction being in communication with the flow channel pipe. The battery pack can avoid heat spread and has good cooling effect.

Description

Technical Field

[0001] This application belongs to the field of new energy technology, specifically relating to a battery pack and electrical equipment. Background Technology

[0002] Thermal management components are critical parts of a battery pack, responsible for reducing the operating temperature of the battery cells. The operating temperature of the battery cells has a significant impact on the battery pack's lifespan and performance. Therefore, the structural design of thermal management components is of paramount importance.

[0003] However, in existing technologies, the thermal management components of battery packs have limited cooling effects on the battery pack and their functions are relatively simple. Utility Model Content

[0004] This application aims to provide a battery pack and electrical equipment to solve the problems of limited cooling effect and single function of the thermal management components of existing battery packs.

[0005] To solve the above-mentioned technical problems, this application is implemented as follows: In a first aspect, this application discloses a battery pack having a first direction, a second direction, and a third direction that are mutually perpendicular to each other, the battery pack comprising: The housing has a receiving cavity; A battery pack is disposed within the receiving cavity. The battery pack includes multiple individual cells distributed along the first direction. Each individual cell has two first surfaces disposed opposite to each other along the third direction. A terminal post and an explosion-proof valve are provided on the same first surface. The thermal management component includes a flow channel pipe and a water storage pipe extending along the first direction. The flow channel pipe is thermally connected to the electrode post and is used for the flow of cooling medium. The water storage pipe is opposite to the explosion-proof valve. One end of the water storage pipe along the first direction is blocked, and the other end of the water storage pipe along the first direction is connected to the flow channel pipe.

[0006] Secondly, this application also discloses an electrical device, which includes: the battery pack described in any of the above claims. In this embodiment, the thermal management component is equipped with a flow channel and a water storage pipe. The flow channel is opposite to the terminal of the individual battery and is used for the flow of cooling medium. The cooling medium in the flow channel can exchange heat with the terminal to dissipate heat from the individual battery. The water storage pipe is opposite to the explosion-proof valve. In the event of thermal runaway of the explosion-proof valve, the water storage pipe can be broken to allow the cooling medium stored inside to be sprayed onto the individual battery, cooling the high-temperature molten material generated by thermal runaway, thereby preventing heat propagation of the battery pack and improving the safety of the battery pack. Since one end of the water storage pipe along the first direction is blocked, the cooling medium in the water storage pipe does not need to participate in the cooling cycle, reducing the circulation loss of the cooling medium, thereby improving the cooling effect of the thermal management component on the individual battery.

[0007] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0008] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a structural schematic diagram of the battery pack described in the embodiments of this application at a certain angle; Figure 2 yes Figure 1 The diagram shows the structure of the battery pack from another angle. Figure 3 yes Figure 1 The diagram shows the exploded structure of the battery pack. Figure 4 yes Figure 2 The diagram shows a cross-sectional view of the battery pack AA. Figure 5 yes Figure 4 An enlarged structural diagram of the battery pack at location B is shown. Figure 6 This is a schematic diagram of a single battery cell; Figure 7 yes Figure 1 One of the schematic diagrams of the thermal management components of the battery pack shown; Figure 8 yes Figure 1 The second schematic diagram of the thermal management components of the battery pack is shown. Figure 9 yes Figure 1 The diagram shown is the third one illustrating the structure of the thermal management components of the battery pack. Figure 10 yes Figure 1The diagram shown is the fourth one illustrating the structure of the thermal management components of the battery pack. Figure 11 yes Figure 1 The diagram shown is the fifth one illustrating the structure of the thermal management components of the battery pack. Figure 12 This is an exploded structural diagram of the first current collector of the thermal management component shown in the embodiment of this application; Figure 13 yes Figure 12 The diagram shows the assembly structure of the first current collector; Figure 14 yes Figure 13 The diagram shows a cross-sectional view of the CC section of the first current collector.

[0009] Reference numerals: 1-Box body, 2-Top cover, 3-Battery pack, 31-Single cell, 311-Terminal post, 312-Explosion-proof valve, 4-Connecting piece, 5-Thermal management component, 51-Flow channel pipe, 52-Water storage pipe, 53-First current collector, 531-First current collector body, 5311-Water inlet, 5312-First partition, 53121-Micropore, 5313-Third partition, 5314-Water outlet, 532-Sealing piece, 533-Internal space, 5331-First subspace, 5332-Second subspace, 54-Second current collector, 540-Second current collector body, 541-Second partition, 542-Cavity, 5421-Third subspace, 5422-Fourth subspace, 6-Thermal conductive adhesive, X-First direction, Y-Second direction, Z-Third direction. Detailed Implementation

[0010] The embodiments of this utility model will now be described in detail. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0011] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0012] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0013] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0014] Reference Figure 1 The diagram shows a structural schematic of the battery pack described in an embodiment of this application at a certain angle. Figure 2 , showed Figure 1 The diagram shows the structure of the battery pack from another angle, for reference. Figure 3 , showed Figure 1 The exploded view of the battery pack shown is for reference only. Figure 4 , showed Figure 2 The schematic diagram of the cross-sectional structure of the battery pack AA shown is for reference. Figure 5 , showed Figure 4 The enlarged structural diagram of battery pack B shown is for reference. Figure 6 , showed Figure 1 The diagram shown is a structural schematic of the battery pack from another angle. (Refer to...) Figure 7 , showed Figure 1 One of the schematic diagrams of the thermal management components of the battery pack shown is referenced. Figure 8 , showed Figure 1 The second schematic diagram of the thermal management components of the battery pack is shown below. Figure 9 , showed Figure 1 The third schematic diagram of the thermal management components of the battery pack is shown below. Figure 10 , showed Figure 1 The fourth schematic diagram of the thermal management components of the battery pack is shown below. (Refer to...) Figure 11 , showed Figure 1The fifth schematic diagram of the thermal management components of the battery pack is shown below. Figure 12 This diagram shows an exploded structural schematic of the first current collector of the thermal management component according to an embodiment of this application. (Refer to...) Figure 13 , showed Figure 12 The schematic diagram of the assembly structure of the first current collector shown is for reference. Figure 14 , showed Figure 13 The diagram shows a cross-sectional view of the CC section of the first current collector.

[0015] like Figures 1 to 7 As shown, the battery pack has two mutually perpendicular directions: a first direction X, a second direction Y, and a third direction Z. Specifically, the battery pack may include: a housing 1 with a receiving cavity; a battery pack 3 disposed within the receiving cavity, the battery pack 3 including multiple individual batteries 31 distributed along the first direction X, each individual battery 31 having two first surfaces facing away from each other along the third direction Z, with a terminal post 311 and an explosion-proof valve 312 disposed on the same first surface; and a thermal management component 5, the thermal management component 5 including a flow channel pipe 51 extending along the first direction X and a water storage pipe 52, the flow channel pipe 51 being thermally connected to the terminal post 311 and used for cooling medium flow, the water storage pipe 52 being opposite to the explosion-proof valve 312, one end of the water storage pipe 52 along the first direction X being blocked, and the other end of the water storage pipe 52 along the first direction X being connected to the flow channel pipe 51.

[0016] In this embodiment, the thermal management component 5 is equipped with a flow channel 51 and a water storage pipe 52. The flow channel 51 is opposite to the terminal post 311 of the single cell 31 and can be used for the flow of cooling medium. The cooling medium in the flow channel 51 can exchange heat with the terminal post 311 to dissipate heat from the single cell 31. The water storage pipe 52 is opposite to the explosion-proof valve 312. In the event of thermal runaway of the explosion-proof valve 312, the water storage pipe 52 can be broken to allow the cooling medium stored inside to be sprayed onto the single cell 31, cooling the high-temperature molten material generated by thermal runaway, thereby preventing heat propagation of the battery pack and improving the safety of the battery pack. Since one end of the water storage pipe 52 along the first direction X is blocked, the cooling medium in the water storage pipe 52 does not need to participate in the cooling cycle, reducing the circulation loss of the cooling medium, thereby improving the cooling effect of the thermal management component 5 on the single cell 31.

[0017] Specifically, in this embodiment of the application, the first direction X can be the length direction of the battery pack, the second direction Y can be the width direction of the battery pack, and the third direction Z can be the height direction of the battery pack.

[0018] like Figure 3As shown, the housing 1 can serve as the supporting body for the battery pack. The housing 1 can have a receiving cavity, where the battery pack 3 and thermal management components 5 can be placed. The battery pack can also include a top cover 2, which can cover the housing 1 and close the opening of the receiving cavity, making the receiving cavity a sealed space to fully protect the battery pack 3 and thermal management components 5 inside the receiving cavity.

[0019] Specifically, such as Figure 3 As shown, the battery pack 3 may include multiple individual battery cells 31, and the multiple individual battery cells 31 may be arranged in a row along the first direction X. Figure 6 As shown, a terminal post 311 and an explosion-proof valve 312 may be disposed on one of the first surfaces of a single battery cell 31. Typically, the terminal post 311 may include a positive terminal post and a negative terminal post, and the terminal post 311 can be used to realize the conductive contact components of the positive and negative terminals of the single battery cell 31. The explosion-proof valve 312 is a physical pressure relief device for the single battery cell 31. When the internal pressure of the single battery cell 31 exceeds a set value, the explosion-proof valve 312 will rupture and release gas to prevent the casing from bursting and causing a safety accident.

[0020] like Figure 3 As shown, the battery pack may include a thermal management component 5, which is disposed along a first direction X and connected to the row of individual battery cells 31. Figure 7 As shown, the thermal management component 5 may include a flow channel pipe 51 and a water storage pipe 52 extending along the first direction X. Figure 5 As shown, the flow channel 51 is thermally connected to the terminal 311. The flow channel 51 can be used for the flow of cooling medium. Through heat exchange between the cooling medium in the flow channel 51 and the terminal 311, the heat of the terminal 311 can be removed, thus achieving heat dissipation of the terminal 311. The water storage pipe 52 is opposite to the explosion-proof valve 312. In the event of thermal runaway of the explosion-proof valve 312, the water storage pipe 52 can be broken to allow the cooling medium stored inside to be sprayed onto the individual battery 31, cooling the high-temperature molten material generated by thermal runaway, thereby preventing heat propagation of the battery pack and improving the safety of the battery pack. Since one end of the water storage pipe 52 along the first direction X is blocked, the cooling medium in the water storage pipe 52 does not need to participate in the cooling cycle, reducing the circulation loss of the cooling medium, thereby improving the cooling effect of the thermal management component 5 on the individual battery 31.

[0021] like Figure 5 As shown, thermally conductive adhesive 6 and connecting piece 4 can also be provided between the terminal post 311 of the single cell 31 and the flow channel tube 51 of the thermal management component 5. That is, the terminal post 311 can be thermally connected to the flow channel tube 51 through the thermally conductive adhesive 6 and connecting piece 4 to improve the connection reliability and heat transfer efficiency between the terminal post 311 and the flow channel tube 51, thereby further improving the heat dissipation effect of the flow channel tube 51 on the terminal post 311.

[0022] It should be noted that the accompanying drawings of this application embodiment only show the case where the individual cells 31 in the battery pack 3 are arranged in two rows, and each row of individual cells 31 is provided with a thermal management component 5. In actual applications, the individual cells 31 in the battery pack 3 can also be arranged in one row, three rows, or four rows, and each row of individual cells 31 can be provided with one or more thermal management components 5. This application embodiment does not specifically limit the number of rows of individual cells 31 in the battery pack 3, nor the number of thermal management components 5 on each row of individual cells 31.

[0023] In practical applications, the portion of the water storage pipe 52 opposite to the explosion-proof valve 312 can be thinned to reduce the strength at that location. This makes the portion of the water storage pipe 52 opposite to the explosion-proof valve 312 more susceptible to damage in the event of thermal runaway, allowing the cooling medium inside the water storage pipe 52 to be more easily sprayed onto the explosion-proof valve 312, thus preventing heat propagation.

[0024] In some alternative embodiments of this application, such as Figure 7 As shown, the thermal management component 5 may further include: a first collector 53 and a second collector 54, which are respectively connected to the two ends of the flow channel pipe 51 and the water storage pipe 52 along the first direction X; wherein, one of the first collector 53 and the second collector 54 blocks one end of the water storage pipe 52 along the first direction X, and the other connects to the other end of the water storage pipe 52 along the first direction X. Both the first collector 53 and the second collector 54 are also connected to the flow channel pipe 51 to connect the water storage pipe 52 and the flow channel pipe 51. By blocking one end of the water storage pipe 52 with the first collector 53 or the second collector 54, the operation of blocking the water storage pipe 52 with a blocking structure inside the water storage pipe 52 can be avoided, simplifying the structure of the water storage pipe 52, and is also easy to implement.

[0025] Specifically, the first manifold 53 and the second manifold 54 can be used to collect and distribute the cooling medium. The first manifold 53 or the second manifold 54 is provided with an inlet 5311 and an outlet 5314. The inlet 5311 can be used to guide the cooling medium into the flow channel pipe 51, and the outlet 5314 can be used to discharge the cooling medium from the flow channel pipe 51. Since both the first manifold 53 and the second manifold 54 are connected to the flow channel pipe 51, they can also be used to distribute the flow rate of the cooling medium into the flow channel pipe 51 to achieve a uniform cooling effect.

[0026] In this embodiment, one of the first current collector 53 and the second current collector 54 can be connected to the water storage pipe 52 to introduce the cooling medium into the water storage pipe 52. This allows the water storage pipe 52 to store the cooling medium. In the event of thermal runaway of the explosion-proof valve 312, the cooling medium stored in the water storage pipe 52 can be sprayed onto the individual battery 31 to cool the high-temperature molten material generated by thermal runaway, thereby preventing thermal propagation of the battery pack and improving battery pack safety. Since the other of the first current collector 53 and the second current collector 54 can block one end of the water storage pipe 52 to prevent the cooling medium from flowing between the water storage pipe 52 and the current collector, the cooling medium in the water storage pipe 52 does not need to participate in the cooling cycle, reducing the circulation loss of the cooling medium and thus improving the cooling effect of the thermal management component 5 on the individual battery 31.

[0027] like Figure 12 As shown, the first current collector 53 may specifically include a first current collector body 531 and a first partition 5312. The first current collector body 531 has an internal space 533, and the first partition 5312 is disposed within the internal space 533, dividing the internal space 533 into a first subspace 5331 and a second subspace 5332 that are isolated from each other. The first subspace 5331 is only connected to the water storage pipe 52 to block one end of the water storage pipe 52, and the second subspace 5332 is connected to the flow channel pipe 51. In this way, the connection between the first current collector 53 and the flow channel pipe 51 can be achieved through the connection between the second subspace 5332 and the flow channel pipe 51. Since the first subspace 5331 is connected to the water storage pipe 52, and the first subspace 5331 and the second subspace 5332 are separated by a first partition 5312, the two are not connected. Therefore, on the first collector 53, the water storage pipe 52 and the flow channel pipe 51 can be separated by the first partition 5312 to achieve the purpose of blocking the water storage pipe 52, and the implementation method is simple.

[0028] like Figures 12 to 14 As shown, a sealing piece 532 may be provided on the first collector 53. The sealing piece 532 can block one end of the water storage pipe 52 to form an internal space 533 within the first collector 53 by enclosing it with the body 531 of the first collector. The sealing piece 532 can be connected to the body 531 of the first collector by means of bonding, welding or other connection methods.

[0029] For example, the material of the sealing plate 532 can be metal, plastic or rubber. This application embodiment does not specifically limit the material of the sealing plate 532.

[0030] In this embodiment of the application, after one end of the water storage pipe 52 is blocked in the first collector 53, it is necessary to connect the water storage pipe 52 and the flow channel pipe 51 in the second collector 54 so that the cooling medium can enter the water storage pipe 52 from the second collector 54.

[0031] It should be noted that this embodiment only illustrates the case where the water storage pipe 52 is blocked from the first manifold 53 and the cooling medium is injected into the water storage pipe 52 from the second manifold 54. In practical applications, the storage pipe can also be blocked from the second manifold 54 and the cooling medium can be injected into the water storage pipe 52 from the first manifold 53, which will not be elaborated here.

[0032] In some alternative embodiments of this application, such as Figure 8 As shown, there is one flow channel pipe 51 and one water storage pipe 52. The first collector 53 is provided with a water inlet 5311, and the second collector 54 is provided with a water outlet 5314. The first partition 5312 can divide the internal space 533 of the first collector 53 into a first subspace 5331 and a second subspace 5332. The water inlet 5311 is connected to the second subspace 5332.

[0033] In specific applications, when the number of flow channel pipe 51 and water storage pipe 52 on the heat management component 5 is only one, the structure of the heat management component 5 is relatively simple, and the structures of the first collector 53 and the second collector 54 are also relatively simple.

[0034] In some other alternative embodiments of this application, such as Figure 10 As shown, there are multiple flow channel pipes 51, and along the second direction Y, the water storage pipe 52 is located between multiple flow channel pipes 51; wherein, the second collector 54 is provided with a water inlet 5311, the first collector 53 is provided with a water outlet 5314, and the water outlet 5314 is connected to the second subspace 5332.

[0035] In practical applications, a flow channel 51 can be thermally connected to one of the terminals 311 of a row of individual cells 31. Therefore, when there are two individual cells 31 arranged in a row, the number of flow channel 51 in the thermal management component 5 can be two accordingly. Typically, since the explosion-proof valve 312 of the individual cell 31 is usually arranged between the two terminals 311 along the second direction Y, in order to be opposite to the position of the explosion-proof valve 312, the water storage pipe 52 can also be located between the two flow channel 51.

[0036] In this embodiment, by setting the inlet 5311 on the second collector 54 and connecting the outlet 5314 to the first collector 53, on the one hand, the cooling medium introduced from the inlet 5311 of the second collector 54 can pass through the flow channel pipe 51 and then be discharged from the outlet 5314 on the first collector 53 to the outside of the heat management component 5; on the other hand, the cooling medium introduced from the inlet 5311 of the second collector 54 can also enter the water storage pipe 52. Since the other end of the water storage pipe 52 is blocked by the first collector 53, the cooling medium in the water storage pipe 52 does not participate in the circulation.

[0037] like Figure 10 As shown, by setting the inlet 5311 on the second collector 54 and connecting the outlet 5314 to the first collector 53, only the first baffle 5312 needs to be set on the first collector 53. The structures of the first collector 53 and the second collector 54 are relatively simple.

[0038] In some alternative embodiments of this application, such as Figure 11 As shown, there are multiple flow channel pipes 51, and along the second direction Y, the water storage pipe 52 is located between the multiple flow channel pipes 51; wherein, the second collector 54 may include a second collector body 540 and a second partition 541. The second collector body 540 has a cavity 542, and the second partition 541 is disposed in the cavity 542 and divides the cavity 542 into a mutually isolated third subspace 5421 and a fourth subspace 5422. The third subspace 5421 is connected to a water inlet 5311, and the fourth subspace 5422 is connected to a water outlet 5314.

[0039] Specifically, Figure 11 In the heat management component 5 shown, both the inlet 5311 and the outlet 5314 are located on the second collector 54, and a second baffle 541 is provided between the inlet 5311 and the outlet 5314, so that the inlet 5311 and the outlet 5314 are separated on the second collector 54, while the water storage pipe 52 is connected to the inlet 5311 within the second collector 54. The cooling medium introduced from the inlet 5311 of the second collector 54 can enter one of the flow channels 51 and the water storage pipe 52, and then the cooling medium in the flow channel 51 can flow out of the heat management component 5 through the other flow channel 51 and the outlet 5314 of the second collector 54. Since the other end of the water storage pipe 52 is blocked by the first collector 53, the cooling medium in the water storage pipe 52 does not participate in circulation.

[0040] like Figure 11As shown, the thermal management component 5 can be used in scenarios where both the inlet 5311 and the outlet 5314 are connected to the second manifold 54. Only a second baffle 541 needs to be added between the inlet 5311 and the outlet 5314 of the second manifold 54, and the structure is relatively simple.

[0041] In some alternative embodiments of this application, such as Figure 9 As shown, there are multiple flow channel pipes 51. Along the second direction Y, the water storage pipe 52 is located between multiple flow channel pipes 51. The first collector 53 may also include a third partition 5313. The first collector 53 is provided with an inlet 5311 and an outlet 5314. The third partition 5313 is also provided between the inlet 5311 and the outlet 5314. The third partition 5313 and the first partition 5312 enclose a first subspace 5331. The inlet 5311 is connected to one of the flow channel pipes 51, and the outlet 5314 is connected to another flow channel pipe 51.

[0042] Specifically, Figure 9 In the heat management component 5 shown, both the inlet 5311 and the outlet 5314 are located on the first collector 53, and a third partition 5313 is provided between the inlet 5311 and the outlet 5314 to separate them on the first collector 53. The third partition 5313 and the first partition 5312 enclose a first subspace 5331. The inlet 5311 is connected to one of the flow channels 51, and the outlet 5314 is connected to the other flow channel 51. In this way, the cooling medium introduced from the inlet 5311 of the first collector 53 can flow through the flow channel 51 connected to it, the second collector 54, and the other flow channel 51, and then flow back to the outlet 5314 on the first collector 53. Since one end of the water storage pipe 52 is blocked by the first collector 53, the water storage pipe 52 can be supplied with cooling medium from the second collector 54 at the other end.

[0043] like Figure 9 As shown, the thermal management component 5 can be used in scenarios where both the inlet 5311 and the outlet 5314 are connected to the first collector 53. Only a third baffle 5313 needs to be added between the inlet 5311 and the outlet 5314 of the first collector 53, and the structure is relatively simple.

[0044] Optional, Figure 9 In the thermal management component 5 shown, the first partition 5312 is located between the water storage pipe 52 and the water outlet 5314. For example... Figure 14 As shown, the first partition 5312 is provided with micropores 53121. The micropores 53121 can be used to connect the water storage pipe 52 and the water outlet 5314 to discharge the air in the water storage pipe 52, so that the water storage pipe 52 is filled with cooling medium.

[0045] In practical applications, due to pressure issues within the water storage pipe 52, the cooling medium may not be fully filled without the micro-holes 53121. However, by providing micro-holes 53121 on the first partition 5312, the flow diversion capacity of the water storage pipe 52 can be limited. Unless the explosion-proof valve 312 experiences thermal runaway, the cooling medium within the water storage pipe 52 essentially does not participate in the cooling cycle.

[0046] Optionally, the cross-sectional area of ​​the micro-orifice 53121 perpendicular to the second direction Y is S1, and the cross-sectional area of ​​the internal space 533 of the first collector 53 perpendicular to the second direction Y is S2, satisfying: 2%≤S1 / S2≤3.5%. In specific applications, by setting the ratio of the cross-sectional area of ​​the micro-orifice 53121 to the cross-sectional area of ​​the first collector 53 within the above range, the cross-sectional area of ​​the micro-orifice 53121 is neither too small to affect the gas discharge in the water storage pipe 52, nor too large to allow the cooling medium to flow into the micro-orifice 53121, thus forcing the cooling medium in the water storage pipe 52 to directly participate in circulation.

[0047] For example, the ratio of the cross-sectional area S1 of the micropore 53121 to the cross-sectional area S2 of the internal space 533 of the first current collector 53 can be 2%, 2.2%, 2.8%, 3% or 3.5%, and the embodiments of this application do not specifically limit this.

[0048] Optionally, S1 satisfies: 0.5mm²≤S1≤2mm². When the cross-sectional area of ​​the micropore 53121 meets the above range, the cross-sectional area of ​​the micropore 53121 is not too small to affect the gas discharge in the water storage pipe 52, nor is it too large to cause the cooling medium to flow into the micropore 53121 and force the cooling medium in the water storage pipe 52 to participate in the circulation.

[0049] It should be noted that, Figures 9 to 11 The thermal management component 5 shown only depicts a configuration where there are two flow channels 51 and a water storage pipe 52 located between the two flow channels 51. In practical applications, the number of flow channels 51 in the thermal management component 5 can be adjusted according to actual conditions; for example, there can be three, four, or six flow channels 51. Furthermore, the water storage pipe 52 can be located between any two flow channels 51. This embodiment of the application does not limit the number of flow channels 51 or the specific location of the water storage pipe 52 in the thermal management component 5.

[0050] Optionally, there is a gap between the water storage pipe 52 and the flow channel pipe 51 along the second direction Y. This can achieve both weight reduction and heat insulation between the water storage pipe 52 and the flow channel pipe 51, further improving the safety of the thermal management component 5.

[0051] In summary, the battery pack described in the embodiments of this application may include at least the following advantages: In this embodiment, the thermal management component is equipped with a flow channel and a water storage pipe. The flow channel is opposite to the terminal of the individual battery and is used for the flow of cooling medium. The cooling medium in the flow channel can exchange heat with the terminal to dissipate heat from the individual battery. The water storage pipe is opposite to the explosion-proof valve. In the event of thermal runaway of the explosion-proof valve, the water storage pipe can be broken to allow the cooling medium stored inside to be sprayed onto the individual battery, cooling the high-temperature molten material generated by thermal runaway, thereby preventing heat propagation of the battery pack and improving the safety of the battery pack. Since one end of the water storage pipe along the first direction is blocked, the cooling medium in the water storage pipe does not need to participate in the cooling cycle, reducing the circulation loss of the cooling medium, thereby improving the cooling effect of the thermal management component on the individual battery.

[0052] This application also provides an electrical device, which may specifically include the battery pack described in any of the above embodiments. The battery pack can be used to provide power to the electrical device. Specifically, the electrical device may include, but is not limited to, vehicles, aircraft, and other devices that require power. This application does not specifically limit the specific content of the electrical device.

[0053] It should be noted that in this embodiment, the structure of the battery pack in the electrical device is the same as that of the battery pack described in any of the above embodiments, and its beneficial effects are also similar, so it will not be described in detail here.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack having a first direction (X), a second direction (Y), and a third direction (Z) that are mutually perpendicular, characterized in that, The battery pack includes: Box (1), the box (1) having a receiving cavity; Battery pack (3), the battery pack (3) is disposed in the receiving cavity, the battery pack (3) includes a plurality of individual cells (31), the plurality of individual cells (31) are distributed along the first direction (X), the individual cells (31) have two first surfaces disposed opposite to each other along the third direction (Z), and a terminal post (311) and an explosion-proof valve (312) are provided on the same first surface; And a thermal management component (5), the thermal management component (5) including a flow channel pipe (51) extending along the first direction (X) and a water storage pipe (52), the flow channel pipe (51) being thermally connected to the pole (311), the flow channel pipe (51) being used for the flow of cooling medium, the water storage pipe (52) being opposite to the explosion-proof valve (312), one end of the water storage pipe (52) along the first direction (X) being blocked, and the other end of the water storage pipe (52) along the first direction (X) being connected to the flow channel pipe (51).

2. The battery pack according to claim 1, characterized in that, The thermal management component (5) further includes: a first collector (53) and a second collector (54), wherein the first collector (53) and the second collector (54) are respectively connected to the two ends of the flow channel pipe (51) and the water storage pipe (52) along the first direction (X); wherein, One of the first collector (53) and the second collector (54) blocks one end of the water storage pipe (52) along the first direction (X), and the other connects to the other end of the water storage pipe (52) along the first direction (X). The first collector (53) and the second collector (54) are also connected to the flow channel pipe (51) to connect the water storage pipe (52) and the flow channel pipe (51).

3. The battery pack according to claim 2, characterized in that, The first current collector (53) includes a first current collector body (531) and a first partition (5312). The first current collector body (531) has an internal space (533), and the first partition (5312) is disposed within the internal space (533), dividing the internal space into a first subspace (5331) and a second subspace (5332) that are isolated from each other; wherein, The first subspace (5331) is connected only to the water storage pipe (52) to block one end of the water storage pipe (52), and the second subspace (5332) is connected to the flow channel pipe (51).

4. The battery pack according to claim 3, characterized in that, The number of flow channels (51) is multiple, and along the second direction (Y), the water storage pipe (52) is located among the multiple flow channels (51); wherein, The second collector (54) is provided with an inlet (5311), and the first collector (53) is provided with an outlet (5314). The outlet is connected to the second subspace (5332).

5. The battery pack according to claim 3, characterized in that, The number of flow channels (51) is multiple, and along the second direction (Y), the water storage pipe (52) is located among the multiple flow channels (51); wherein, The second current collector (54) includes a second current collector body (540) and a second partition (541). The second current collector body (540) has a cavity (542). The second partition (541) is disposed in the cavity (542) and divides the cavity (542) into a third subspace (5421) and a fourth subspace (5422) that are isolated from each other. The third subspace (5421) is connected to an inlet (5311), and the fourth subspace (5422) is connected to an outlet (5314).

6. The battery pack according to claim 3, characterized in that, The number of flow channels (51) is multiple, and along the second direction (Y), the water storage pipe (52) is located among the multiple flow channels (51); wherein, The first collector (53) further includes a third partition (5313). The first collector (53) is provided with an inlet (5311) and an outlet (5314). The third partition (5313) and the first partition (5312) enclose the first subspace (5331). The inlet (5311) is connected to one of the flow channels (51), and the outlet (5314) is connected to the other flow channel (51).

7. The battery pack according to claim 6, characterized in that, The first partition (5312) is located between the water storage pipe (52) and the water outlet (5314). The first partition (5312) is provided with micropores (53121), which are used to connect the water storage pipe (52) and the water outlet (5314) to discharge the air in the water storage pipe (52).

8. The battery pack according to claim 7, characterized in that, The flow cross-sectional area of ​​the micropore (53121) perpendicular to the second direction (Y) is S1, and S1 satisfies: 0.5 mm. 2 ≤S1≤2mm 2 .

9. The battery pack according to any one of claims 1 to 8, characterized in that, Along the second direction (Y), there is a gap between the water storage pipe (52) and the flow channel pipe (51).

10. An electrical appliance, characterized in that, The electrical equipment includes: the battery pack according to any one of claims 1 to 9.

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