Battery pack

Abstract

The invention provides a battery pack, and relates to the technical field of batteries. The battery pack comprises a battery module and a water cooling pipeline, the water cooling pipeline comprises a spraying pipeline, the spraying pipeline comprises a first pipe and a second pipe, the second pipe is sleeved with the first pipe, the temperature resistance of the first pipe is larger than that of the second pipe, and spraying holes are formed in the first pipe; the battery module comprises a plurality of battery cells, each battery cell comprises a first explosion-proof valve, each battery cell is correspondingly provided with the spraying hole, and the spraying hole faces the first explosion-proof valve of the corresponding battery cell. When thermal runaway happens to one battery cell, high-temperature flames and gas are sprayed out of the first anti-explosion valve, and therefore the second pipe is burnt out through the spraying holes. And at the moment, the cooling liquid is sprayed into the battery cell through the cold spraying hole and the first anti-explosion valve, so that rapid cooling of the battery cell subjected to thermal runaway is realized, and the risk of fire or explosion of the battery pack is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack. Background Art

[0002] With the development of battery technology, new energy vehicles using power battery packs as power sources are becoming more and more widely used.

[0003] During the use of new energy vehicles, battery pack fire accidents caused by thermal runaway of the battery pack often occur. In order to reduce the risk of fire and explosion of the battery pack when thermal runaway occurs, a nozzle can be set in the battery pack box, and the nozzle can spray coolant to the battery cells in the battery pack to reduce the risk of fire and explosion.

[0004] However, the nozzle can only spray coolant to a fixed position and cannot accurately spray coolant to the battery cell that has thermal runaway. The battery cell that has thermal runaway cannot be cooled quickly, and the risk of battery pack fire or explosion is relatively high. Summary of the invention

[0005] In view of this, the present application provides a battery pack to solve the problem that the nozzle can only spray coolant to a fixed position and cannot accurately spray coolant to the battery cell experiencing thermal runaway, the battery cell experiencing thermal runaway cannot be cooled quickly, and the battery pack has a high risk of fire or explosion.

[0006] The present application provides a battery pack, the battery pack comprising a battery module and a water cooling pipeline, the water cooling pipeline comprising a spray pipeline, the spray pipeline comprising a first tube and a second tube, the first tube is sleeved outside the second tube, the temperature resistance of the first tube is greater than the temperature resistance of the second tube, and a spray hole is opened on the first tube;

[0007] The battery module includes a plurality of battery cells, each of which includes a first explosion-proof valve. Each of the battery cells is correspondingly provided with the spray hole, and the spray hole faces the first explosion-proof valve of the corresponding battery cell.

[0008] Preferably, the temperature resistance of the first tube exceeds 1000°C, and the temperature resistance of the second tube does not exceed 200°C.

[0009] Preferably, the battery pack further includes a liquid cooling plate, and both ends of the water cooling pipeline are respectively connected to the liquid cooling plate.

[0010] Preferably, the water cooling pipeline includes a plurality of spray pipes, and the plurality of spray pipes are parallel. The head end of the second tube in one of two adjacent spray pipes is connected to the tail end of the second tube in the other spray pipe through a connecting pipe, and the second tube in the spray pipe located at the head end and the second tube in the spray pipe located at the tail end are both connected to the liquid cooling plate.

[0011] Preferably, the battery module also includes an insulating plate, which is arranged on the same side of the multiple battery cells, and a plurality of liquid inlets are opened on the insulating plate, and the plurality of liquid inlets correspond one-to-one to the plurality of first explosion-proof valves included in the multiple battery cells, and the first explosion-proof valves are exposed through the corresponding liquid inlets.

[0012] Preferably, the battery module comprises a shell, the multiple battery cells and the insulating plate are arranged inside the shell, the shell is provided with an opening, and the multiple liquid inlets are exposed through the opening.

[0013] Preferably, the liquid cooling plate includes a liquid cooling body, a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are both connected to the liquid cooling body, and both ends of the water cooling pipeline are respectively connected to the first connecting pipe and the second connecting pipe.

[0014] Preferably, the battery pack further comprises a circulation pipe, a water pump and an expansion water tank, and the water pump and the expansion water tank are both arranged on the circulation pipe;

[0015] The liquid cooling plate further includes a third connecting pipe and a fourth connecting pipe, both of which are connected to the liquid cooling body, and both ends of the circulation pipeline are connected to the third connecting pipe and the fourth connecting pipe respectively.

[0016] Preferably, the battery pack further comprises a box body, a cover plate and a plurality of battery modules, the plurality of battery modules and the liquid cooling plate are arranged inside the box body, and the cover plate is arranged on the box body.

[0017] Preferably, the battery pack further includes a pressure sensor and a battery management system, the pressure sensor and the battery management system are both arranged inside the box, and the pressure sensor and the water pump are both communicatively connected to the battery management system.

[0018] Preferably, the battery pack further includes a second explosion-proof valve, a mounting opening is provided on the cover plate, and the second explosion-proof valve is arranged on the mounting opening.

[0019] Preferably, the battery module further comprises a plurality of support seats, and the plurality of support seats are all fixed on the insulating plate, and a portion of the water cooling pipeline is located inside the support seats.

[0020] Preferably, the support seat comprises two clamping grooves, at least one of the support seats is correspondingly provided with a clamp, two ends of the clamp are respectively clamped with the two clamping grooves, and the water cooling pipe is located between the support seat and the clamp.

[0021] In the battery pack of the present application, the battery pack includes a battery module and a water-cooling pipeline, the water-cooling pipeline includes a spray pipeline, the spray pipeline includes a first tube and a second tube, the first tube is sleeved on the outside of the second tube, the temperature resistance of the first tube is greater than that of the second tube, and a spray hole is opened on the first tube; the battery module includes a plurality of battery cells, the battery cell includes a first explosion-proof valve, and each battery cell is correspondingly provided with a spray hole, and the spray hole faces the first explosion-proof valve. When a battery cell has thermal runaway, high-temperature flames and gases are ejected from the first explosion-proof valve, thereby burning the second tube through the spray hole. At this time, the coolant is sprayed into the interior of the battery cell through the spray hole and the first explosion-proof valve, achieving rapid cooling of the battery cell in thermal runaway, thereby reducing the risk of fire or explosion of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram showing the structure of a battery pack according to an embodiment of the present invention;

[0024] Figure 2 An exploded view of a battery pack showing an embodiment of the present invention;

[0025] Figure 3 A diagram showing the relative positions of the battery module and the box;

[0026] Figure 4 A schematic diagram showing the structure of a water cooling pipeline is shown;

[0027] Figure 5 Show Figure 4 An enlarged view of part A in FIG.

[0028] Figure 6 A cross-sectional view of a sprinkler pipe is shown;

[0029] Figure 7 A schematic diagram of the structure of a liquid cooling plate is shown;

[0030] Figure 8 A schematic structural diagram of a first plate is shown;

[0031] Fig. 9 A schematic diagram showing the structure of the second plate;

[0032] Fig.10 A schematic diagram showing the structure of a battery module is shown;

[0033] Fig.11A diagram showing the relative positions of the liquid cooling plate and the water cooling pipeline.

[0034] Icons: 1-box; 2-battery module; 21-insulating plate; 211-liquid inlet; 22-shell; 221-opening; 23-first explosion-proof valve; 24-support seat; 25-clamp; 3-water cooling pipeline; 31-spray pipe; 311-first pipe; 312-second pipe; 313-spray hole; 32-connecting pipe; 33-installation pipe; 4-liquid cooling plate; 41-liquid cooling body; 411-first plate; 412-second plate; 413-cooling channel; 42-first connecting pipe; 43-second connecting pipe; 44-third connecting pipe; 45-fourth connecting pipe; 51-battery management system; 52-pressure sensor; 6-cover; 7-second explosion-proof valve; 81-water pump; 82-expansion water tank; 9-circulation pipe. DETAILED DESCRIPTION

[0035] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0036] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0037] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0038] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0039] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0040] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0041] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0042] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0043] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0044] The present application provides a battery pack, such as Figures 1 to 11 As shown, the battery pack includes a battery module 2 and a water cooling pipeline 3, the water cooling pipeline 3 includes a spray pipeline 31, the spray pipeline 31 includes a first tube 311 and a second tube 312, the first tube 311 is sleeved outside the second tube 312, the temperature resistance of the first tube 311 is greater than that of the second tube 312, and a spray hole 313 is opened on the first tube 311; the battery module 2 includes a plurality of battery cells, the battery cells include a first explosion-proof valve 23, and each battery cell is correspondingly provided with a spray hole 313, and the spray hole 313 faces the first explosion-proof valve 23. When a battery cell has thermal runaway, high-temperature flames and gases are sprayed out from the first explosion-proof valve 23, thereby burning the second tube 312 through the spray hole 313, and at this time, the coolant is sprayed into the interior of the battery cell through the spray hole and the first explosion-proof valve 23, so as to achieve rapid cooling of the battery cell in thermal runaway, thereby reducing the risk of fire or explosion of the battery pack.

[0045] Furthermore, the temperature resistance of the first tube 311 exceeds 1000° C., and the temperature resistance of the second tube 312 does not exceed 200° C. In this way, when thermal runaway occurs, only the position of the second tube 312 corresponding to the spray hole 313 is burned out.

[0046] Preferably, the first tube 311 may be made of mica, and the second tube 312 may be made of nylon.

[0047] In the embodiments of the present application, Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the water cooling pipeline 3 is located at the top of the multiple battery modules 2, and the water cooling pipeline 3 includes multiple spray pipes 31. The multiple spray pipes 31 are parallel, and the head end of the second tube 312 in one of the two adjacent spray pipes 31 is connected to the tail end of the second tube 312 in the other spray pipe 31 through the connecting pipe 32, and the second tube 312 in the spray pipe 31 located at the head end and the second tube 312 in the spray pipe 31 located at the tail end are both connected to the liquid cooling plate 4. The multiple spray pipes 31 are arranged in the above manner, so that the first explosion-proof valve 23 of each battery cell in the multiple battery modules 2 corresponds to a spray hole 313, so as to ensure that when any battery cell has thermal runaway, the second tube 312 is burned out at the position corresponding to the spray hole 313 of the battery cell, and the coolant is sprayed into the interior of the battery cell through the spray hole 313 and the first explosion-proof valve 23, so as to achieve rapid cooling of the battery cell with thermal runaway.

[0048] like Figure 4 and Fig.11As shown, the water cooling pipeline 3 also includes two installation pipes 33, and the second pipe 312 in the spray pipe 31 at the head end and the second pipe 312 in the spray pipe 31 at the tail end are respectively connected to the liquid cooling plate 4 through the two installation pipes 33. Preferably, the plurality of second pipes 312, the connecting pipes 32 and the installation pipes 33 can be integrally formed.

[0049] In the embodiments of the present application, Figure 2 , Figure 7 and Fig.11 As shown, the battery pack also includes a liquid cooling plate 4, and both ends of the water cooling pipe 3 are connected to the liquid cooling plate 4 respectively. In this way, the water cooling pipe 3 can share the coolant with the liquid cooling plate 4, that is, the water cooling pipe 3 and the vehicle thermal management system share the coolant, and no additional coolant is needed in the vehicle, and the weight and cost of the vehicle will not increase. At the same time, the coolant has the characteristic of high latent heat of vaporization, and a small amount of coolant can quickly reduce the temperature of the battery cell, further reducing the risk of fire or explosion when the battery pack is thermally runaway.

[0050] Preferably, the vehicle's thermal management system needs to use a coolant with low conductivity to prevent high-voltage arcing.

[0051] like Figure 7 and Fig.11 As shown, the liquid cooling plate 4 includes a liquid cooling body 41, a first connecting pipe 42 and a second connecting pipe 43, the first connecting pipe 42 and the second connecting pipe 43 are both connected to the liquid cooling body 41, and the two installation pipes 33 of the water cooling pipeline 3 are respectively connected to the first connecting pipe 42 and the second connecting pipe 43.

[0052] Optionally, the liquid cooling body 41 includes a first plate 411 and a second plate 412. Figure 8 and Fig. 9 As shown, a cooling channel 413 is formed on the second plate 412, and the edge of the first plate 411 is welded to the edge of the second plate 412. The first connecting pipe 42 and the second connecting pipe 43 are both welded to the first plate 411, so as to communicate with the cooling channel 413.

[0053] Furthermore, if Figure 1 and Figure 8As shown, the battery pack also includes a circulation pipe 9, a water pump 81 and an expansion water tank 82, and the water pump 81 and the expansion water tank 82 are both arranged on the circulation pipe 9; the liquid cooling plate 4 also includes a third connecting pipe 44 and a fourth connecting pipe 45, and the third connecting pipe 44 and the fourth connecting pipe 45 are both welded on the first plate 411, so that the third connecting pipe 44 and the fourth connecting pipe 45 are connected to the cooling channel 413, and the two ends of the circulation pipe 9 are respectively connected to the third connecting pipe 44 and the fourth connecting pipe 45, so as to realize the circulation of the coolant. When thermal runaway occurs, the water pump 81 works to ensure the supply of coolant to the water cooling pipe 3. At the same time, the expansion water tank 82 stores coolant, which can replenish the coolant in the liquid cooling plate 4 and the water cooling pipe 3.

[0054] Preferably, the volume of the water cooling pipeline 3 is V1, the volume of the circulation pipeline 9 is V2, the volume of the expansion water tank 82 is V3, the volume of the liquid cooling plate 4 is V4, the total volume of the entire circuit Vtotal = V1 + V2 + V3 + V4, when thermal runaway occurs, the spray efficiency of the coolant is R, the latent heat of vaporization of the coolant is H, and the heat generated when thermal runaway occurs is Q. The above parameters need to meet the following requirements:

[0055] V 总 ⅹRⅹH>Q

[0056] The spray efficiency R is the volume of the coolant sprayed when thermal runaway occurs and the total volume of the entire circuit V 总 The ratio of , where the volume of coolant ejected when thermal runaway occurs can be obtained through experiments.

[0057] In the embodiments of the present application, Fig.10 As shown, the battery module 2 further includes an insulating plate 21, which is disposed on the same side of the plurality of battery cells to insulate the battery cells, and a plurality of liquid inlets 211 are provided on the insulating plate 21, and the plurality of liquid inlets 211 correspond one-to-one to a plurality of first explosion-proof valves 23 included in the plurality of battery cells, and the first explosion-proof valves 23 are exposed through the corresponding liquid inlets 211. When thermal runaway occurs, the coolant can enter the interior of the battery cell through the liquid inlet 211 and the first explosion-proof valve 23, thereby realizing rapid cooling of the battery cell.

[0058] Furthermore, the battery module 2 includes a shell 22, and the multiple battery cells and the insulating plate 21 are arranged inside the shell 22, and the multiple battery cells can be fixed through the shell 22. A square opening 221 is opened on the upper part of the shell 22, so that part of the insulating plate 21 is exposed, and then the multiple liquid inlets 211 are exposed through the opening 221.

[0059] like Fig.10As shown, the battery module 2 also includes a plurality of support seats 24, which are all fixed on the insulating plate 21. The middle of the support seat 24 is recessed, so that part of the water cooling pipeline 3 can be set in the support seat 24, thereby achieving the fixation of the water cooling pipeline 3.

[0060] In addition, the support seat 24 includes two clamping grooves, which are respectively located on both sides of the recessed part. At least one support seat 24 is correspondingly provided with a clamp 25, and the two ends of the clamp 25 are respectively clamped with the two clamping grooves. At this time, the water cooling pipeline 3 is located between the support seat 24 and the clamp 25, thereby achieving the fixation of the water cooling pipeline 3.

[0061] Preferably, each battery module 2 includes five support seats 24, and the five support seats 24 are arranged at intervals to support different positions of the water cooling pipeline 3. The support seat 24 in the middle is correspondingly provided with a clamp 25, and the clamp 25 cooperates with the support seat 24 to fix the water cooling pipeline 3.

[0062] In the embodiments of the present application, Figure 2 and Figure 3 As shown, the battery pack includes a box body 1, a cover body 6 and a plurality of battery modules 2, wherein the plurality of battery modules 2 are arranged inside the box body 1, and the cover body 6 is arranged on the box body 1. The plurality of spray pipes 31 in the water cooling pipeline 3 are supported by the support seats 24 in different battery modules 2. The number of spray holes 313 in the water cooling pipeline 3 is equal to the number of battery cells in the battery pack, and each battery cell is correspondingly provided with a spray hole 313.

[0063] Furthermore, a mounting opening is provided on the cover body 6, and a second explosion-proof valve 7 is provided on the mounting opening. When thermal runaway occurs, the gas in the box body 1 of the battery pack can be discharged through the second explosion-proof valve 7 in time.

[0064] In addition, the battery pack also includes a battery management system 51 and a pressure sensor 52. The battery management system 51 and the pressure sensor 52 are both arranged inside the box 1. The pressure sensor 52 is connected to the battery management system 51 for communication. The pressure sensor 52 is used to detect the pressure inside the box 1 and send it to the battery management system 51. The battery management system 51 can determine whether the battery pack is in normal operation or thermal runaway based on the received signal. At the same time, the water pump 81 is also connected to the battery management system 51 for communication. When the battery pack is in normal use, the water pump 81 can choose to run or not run based on the actual operating conditions. When the battery management system 51 determines that the battery pack has thermal runaway, the water pump 81 keeps running or starts to ensure that the coolant can enter the interior of the battery cell through the spray hole 313, the liquid inlet 211 and the first explosion-proof valve 23 to achieve rapid cooling of the battery cell.

[0065] When the battery pack is operating normally, the coolant circulates in the liquid cooling plate 4, the water cooling pipeline 3 and the circulation pipeline. When thermal runaway occurs, the high-temperature gas and flame break through the first explosion-proof valve 23, and burn through the portion of the second tube 312 corresponding to the spray hole 313 through the spray hole 313, so that the coolant inside the second tube 312 can enter the interior of the battery cell through the spray hole 313, the liquid inlet 211 and the first explosion-proof valve 23, thereby achieving rapid cooling of the battery cell and reducing the risk of fire or explosion of the battery pack.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery pack, characterized in that: The battery pack includes a battery module and a water cooling pipeline, the water cooling pipeline includes a spray pipeline, the spray pipeline includes a first tube and a second tube, the first tube is sleeved outside the second tube, the temperature resistance of the first tube is greater than the temperature resistance of the second tube, and a spray hole is opened on the first tube; The battery module includes a plurality of battery cells, each of which includes a first explosion-proof valve. Each of the battery cells is correspondingly provided with the spray hole, and the spray hole faces the first explosion-proof valve of the corresponding battery cell.

2. The battery pack according to claim 1, characterized in that: The temperature resistance of the first tube exceeds 1000°C, and the temperature resistance of the second tube does not exceed 200°C.

3. The battery pack according to claim 1, characterized in that: The battery pack also includes a liquid cooling plate, and both ends of the water cooling pipeline are respectively connected to the liquid cooling plate.

4. The battery pack according to claim 3, characterized in that: The water cooling pipeline includes a plurality of spray pipes, which are parallel to each other. The head end of the second tube in one of two adjacent spray pipes is connected to the tail end of the second tube in the other spray pipe through a connecting pipe, and the second tube in the spray pipe at the head end and the second tube in the spray pipe at the tail end are both connected to the liquid cooling plate.

5. The battery pack according to any one of claims 1 to 4, characterized in that: The battery module also includes an insulating plate, which is arranged on the same side of the multiple battery cells. The insulating plate is provided with multiple liquid inlets, which correspond one-to-one to the multiple first explosion-proof valves included in the multiple battery cells, and the first explosion-proof valves are exposed through the corresponding liquid inlets.

6. The battery pack according to claim 5, characterized in that: The battery module comprises a shell, the multiple battery cells and the insulating plate are arranged inside the shell, the shell is provided with an opening, and the multiple liquid inlets are exposed through the opening.

7. The battery pack according to claim 3, characterized in that: The liquid cooling plate includes a liquid cooling body, a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are both connected to the liquid cooling body, and both ends of the water cooling pipeline are respectively connected to the first connecting pipe and the second connecting pipe.

8. The battery pack according to claim 7, characterized in that: The battery pack further includes a circulation pipeline, a water pump and an expansion water tank, wherein the water pump and the expansion water tank are both arranged on the circulation pipeline; The liquid cooling plate further includes a third connecting pipe and a fourth connecting pipe, both of which are connected to the liquid cooling body, and both ends of the circulation pipeline are connected to the third connecting pipe and the fourth connecting pipe respectively.

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises a box body, a cover plate and a plurality of battery modules. The plurality of battery modules and the liquid cooling plate are both arranged inside the box body, and the cover plate is arranged on the box body.

10. The battery pack according to claim 9, characterized in that: The battery pack further includes a pressure sensor and a battery management system. The pressure sensor and the battery management system are both arranged inside the box. The pressure sensor and the water pump are both communicatively connected to the battery management system.

11. The battery pack according to claim 9, characterized in that: The battery pack further includes a second explosion-proof valve. A mounting opening is provided on the cover plate, and the second explosion-proof valve is disposed on the mounting opening.

12. The battery pack according to claim 5, characterized in that: The battery module further includes a plurality of support seats, all of which are fixed on the insulating plate, and a portion of the water cooling pipeline is located inside the support seats.

13. The battery pack according to claim 12, characterized in that: The support seat comprises two clamping grooves, at least one of the support seats is correspondingly provided with a clamp, two ends of the clamp are respectively clamped with the two clamping grooves, and the water cooling pipe is located between the support seat and the clamp.

Images