Battery module, energy storage apparatus, and electrical device

Abstract

The present application discloses a battery module, an energy storage apparatus, and an electrical device. The battery module comprises multiple single cell batteries, multiple explosion-proof valves, at least one protective cover, and multiple detection members; the multiple single cell batteries are sequentially arranged in a preset direction, and the multiple single cell batteries are all provided with explosion-proof holes; the multiple explosion-proof valves are arranged in the multiple explosion-proof holes respectively; the protective cover is arranged above and covers the multiple explosion-proof valves, and the protective cover is provided with multiple through holes arranged at intervals; the multiple detection members are arranged to penetrate the multiple through holes respectively, and one ends of the multiple detection members are located in the protective cover and respectively cover the multiple explosion-proof holes, while the other ends of the multiple detection members are located outside the protective cover respectively; and each detection member is configured to be a component that changes color when encountering an electrolyte so that the blasting condition of the explosion-proof valves is detected by the color change of the detection members.

Description

Battery modules, energy storage devices and electrical equipment

[0001] Related cross-references

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on October 17, 2023, with application number "2023113400482" and public name "Battery module, energy storage device and electrical equipment", all contents of which are incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of energy storage technology, and in particular to a battery module, an energy storage device, and an electrical device. Background Art

[0004] Generally, it is difficult to produce high-power single cells with high voltage or high current. Usually, multiple single cells are connected in series or parallel to form a battery module, and the battery module is placed in a box and packaged into a high-power battery pack to improve the battery life.

[0005] In order to protect the explosion-proof valve on the single cell, a protective cover is usually installed above the explosion-proof valve in the related art. In this way, the explosion-proof valve will be obscured by the protective cover, making it difficult to determine whether the explosion-proof valve is open by visual inspection of the explosion-proof valve. Therefore, the battery pack in the related art mainly uses the information exchange between the BMS (Battery Management System) and the detection equipment to identify whether the single cell has experienced thermal runaway. However, this type of thermal runaway identification method is costly, and the detection equipment used in the battery pack in the related art is usually installed on the box, which cannot accurately locate the thermal runaway of a single cell. The thermal runaway identification accuracy is low, and it is impossible to accurately locate which single cell is the source of thermal runaway during thermal runaway, making it impossible to implement fire extinguishing measures in a timely and targeted manner.

[0006] Summary of the Invention

[0007] The embodiments of the present application disclose a battery module, an energy storage device, and an electrical device, which can reduce the cost of thermal runaway identification while accurately locating and identifying which single battery cell has experienced thermal runaway, thereby enabling early and targeted fire extinguishing measures to be implemented on the single battery cell experiencing thermal runaway.

[0008] In order to achieve the above objectives, the present application discloses a battery module in a first aspect, comprising:

[0009] A plurality of single cells, wherein the plurality of single cells are arranged in sequence along a preset direction, and each of the plurality of single cells is provided with an explosion-proof hole;

[0010] a plurality of explosion-proof valves, each of which is disposed in the plurality of explosion-proof holes;

[0011] a protective cover, the protective cover being arranged above the plurality of explosion-proof valves and having a plurality of through holes arranged at intervals; and;

[0012] Multiple detection parts are respectively arranged in the multiple through holes, and one end of the multiple detection parts is respectively located in the protective cover and respectively sealed at the multiple explosion-proof holes, and the other end of the multiple detection parts is respectively located outside the protective cover, and each of the detection parts is configured to be a component that changes color when encountering electrolyte, so as to detect the explosion of the explosion-proof valve through the color change of the detection part.

[0013] In the battery module provided in the present application, multiple detection parts are colored, and one end of the multiple detection parts is respectively sealed at the explosion-proof holes of multiple single batteries and respectively located above the corresponding explosion-proof valves. The other end of each detection part passes through the through hole on the protective cover and is exposed outside the protective cover to avoid being blocked by the protective cover. At the same time, when the explosion-proof valve at the explosion-proof hole explodes, the airflow ejected from the explosion-proof hole will contact the detection part, and the ejected airflow will include acidic electrolyte. When the detection part encounters the acidic electrolyte, its color will change, that is, when the explosion-proof valve at the explosion-proof hole is opened, the color of the detection part arranged at the explosion-proof hole will change. In this way, whether the explosion-proof valve is exploded can be judged by observing whether the color of the part of the detection part located outside the protective cover changes, so that the single battery where thermal runaway occurs can be accurately located and identified, and then fire extinguishing measures can be implemented on the single battery where thermal runaway occurs as early as possible and in a targeted manner, which can greatly improve the safety of the energy storage device. In addition, since the present application determines whether thermal runaway has occurred in a single cell by determining whether the color of the detection part has changed, the cost of the detection part is relatively low. Therefore, the technical solution of the present application can accurately determine which single cell has experienced thermal runaway, thereby improving the accuracy of thermal runaway identification and reducing the cost of thermal runaway identification.

[0014] As an optional implementation of the embodiment of the present application, the detection part includes a fitting part and a hand-held part, the fitting part is fitted at the explosion-proof hole, the hand-held part is passed through the through hole, and one end of the hand-held part is located outside the protective cover and connected to the fitting part, and the other end of the hand-held part is located outside the protective cover; an installation mark is provided on the hand-held part, and the installation mark can be an identification hole, an identification protrusion, text, pattern, icon or other symbol that can serve as an identification.

[0015] During assembly, the detection piece is first inserted into the through hole, and then the fitting portion of the detection piece is fitted to the explosion-proof hole. If the length of the portion of the detection piece inserted into the protective cover is too short when the handheld portion of the handheld detection piece is inserted into the through hole and fitted, it will be difficult for the fitting portion to fit into the explosion-proof hole. The detection piece will then need to be inserted into the protective cover again through the through hole, and the length of the portion of the detection piece inserted into the protective cover will need to be adjusted back and forth, which is quite troublesome. By providing an installation mark on the handheld portion, the installation mark can serve as a mark for the detection piece to stop after it is inserted into the through hole and inserted into the protective cover to a certain extent. This allows the detection piece to be stopped from being inserted into the protective cover when the installation mark is located at the through hole. The installation mark can then be used as an installation positioning prompt for the detection piece. In this way, the detection piece can be inserted into the protective cover in one step without having to adjust the length of the portion of the detection piece inserted into the protective cover, thereby saving assembly time and improving assembly efficiency.

[0016] As an optional implementation of the embodiment of the present application, the detection piece includes a fitting portion and a hand-held portion, the fitting portion is fitted at the explosion-proof hole, the hand-held portion is inserted into the through hole, and one end of the hand-held portion is located inside the protective cover and connected to the fitting portion, and the other end of the hand-held portion is located outside the protective cover; the hand-held portion is connected to a one-way limiting structure, and the one-way limiting structure is used to only allow the hand-held portion to move unidirectionally relative to the through hole from outside the protective cover to inside the protective cover, that is, when the hand-held portion is held by hand to insert the detection piece into the protective cover through the through hole, the detection piece can be pushed into the inside of the protective cover, and when the hand-held portion is held by hand to pull the detection piece out to the outside of the protective cover, the detection piece cannot be pulled out to the outside of the protective cover due to the limiting action of the one-way limiting structure.

[0017] In this way, on the one hand, the detection piece can be inserted into the through hole while avoiding the situation that the handle is pulled out of the protective cover by mistake when lifting the battery module or assembling the wiring harness to the integrated busbar, thereby breaking the detection piece, or causing the fitting part of the detection piece to be lifted up, and causing the protective patch to be lifted up, thereby avoiding the explosion-proof valve from being exposed, and then avoiding sharp objects from damaging the explosion-proof valve, or avoiding foreign matter, dust, powder, electrolyte, etc. from falling into the explosion-proof valve and contaminating the explosion-proof valve, thereby improving the service life of the explosion-proof valve; on the other hand, after the explosion-proof valve explodes, the detection piece may be further pulled into the protective cover or broken by the impact of the airflow. At this time, the detection piece will be subjected to a reverse force and has a tendency to move to the outside of the protective cover. The one-way limit structure can prevent the detection piece from moving to the outside of the protective cover, thereby avoiding the detection piece from detaching from the through hole of the protective cover when the explosion-proof valve explodes.

[0018] As an optional embodiment of the embodiment of the present application, the surface of the hand-held portion connected to the one-way limiting structure is a connecting surface, and the one-way limiting structure includes a plurality of latches, and the plurality of latches are arranged in sequence along the moving direction of the hand-held portion relative to the through hole, and each of the latches includes a first surface and a second surface opposite to each other in the moving direction, and a plurality of first surfaces and a plurality of second surfaces are alternately arranged. For adjacent first surfaces and second surfaces, in the moving direction, the first surface is closer to the fitting portion than the second surface, and each first surface is a guiding inclined surface arranged at an obtuse angle to the connecting surface, so that when the detection piece is pushed into the protective cover, the first surface will not be stopped and limited by the outer surface of the protective cover, so that the hand-held portion of the detection piece can move relative to the through hole from the outside of the protective cover to the inside of the protective cover, and each second surface is arranged at an acute angle or a right angle to the connecting surface, so that when the detection piece is pulled out of the protective cover, the first surface will be stopped and limited by the outer surface of the protective cover, so that the hand-held portion of the detection piece cannot move relative to the through hole from the inside of the protective cover to the outside of the protective cover, thereby realizing one-way movement of the hand-held portion. The one-way limiting structure adopts the above-mentioned structure. The one-way limiting structure is relatively simple in structure and easy to implement, which helps to maintain the cost of the detection part within a relatively low range.

[0019] As an optional implementation of the embodiment of the present application, the battery module further includes a movable baffle, which is rotatably connected to the single battery. The movable baffle can be rotated relative to the single battery to cover the explosion-proof hole or to open the explosion-proof hole. The detection member is connected to the surface of the movable baffle facing the explosion-proof valve, so that when the explosion-proof valve explodes, the high-temperature and high-pressure airflow in the single battery breaks through the explosion-proof valve and contacts the fitting portion of the detection member, so that the fitting portion of the detection member is stained with acidic electrolyte and changes color, and at the same time acts on the fitting portion and the movable baffle, so as to The movable baffle is rotated relative to the single battery to open the explosion-proof hole. At the same time, the fitting part of the detection piece will rotate relative to the single battery together with the movable baffle, so that the detection piece is further pulled into the protective cover, and the length of the part of the detection piece exposed outside the protective cover is shortened. In this way, not only can the color change of the detection piece be used to determine which single battery the thermal runaway occurs in, but also the length change of the part of the detection piece exposed outside the protective cover can be used to identify which battery cell the thermal runaway occurs in. In this way, it is possible to identify which battery cell the thermal runaway occurs in from multiple dimensions, which is conducive to improving the accuracy of thermal runaway identification.

[0020] In addition, since the fitting portion of the detection member fits on the surface of the movable baffle facing the explosion-proof valve, the movable baffle can be used to enhance the structural strength of the fitting portion to prevent the fitting portion from being broken by the airflow ejected from the explosion-proof valve.

[0021] As an optional implementation of the present application, one of the movable baffle and the single battery is provided with a rotating shaft, and the other of the movable baffle and the single battery is provided with an axial hole, through which the rotating shaft is rotatably inserted. The mutual cooperation between the rotating shaft and the axial hole realizes the rotational connection between the movable baffle and the single battery, which can make the connection between the movable baffle and the single battery more secure and reliable, and not easy to fall off.

[0022] As an optional implementation of the embodiment of the present application, a tensile film is provided on the side of each detection member facing away from the explosion-proof valve. By providing a tensile film on the side of the detection member facing away from the explosion-proof valve, the tensile film can be prevented from blocking the detection member, thereby ensuring that the detection member can contact the acidic electrolyte mixed in the airflow, while improving the tensile performance of the detection member, thereby preventing the detection member from being torn off and detaching from the through-hole of the protective cover when the explosion-proof valve explodes, and ensuring that after the detection member contacts the acidic electrolyte and changes color, the changed color can diffuse to the other end of the detection member located outside the protective cover, thereby ensuring that the color change of the other end of the detection member located outside the protective cover can be observed to determine which single cell thermal runaway has occurred.

[0023] As an optional implementation of the embodiment of the present application, each of the single cells is provided with a sink, and the multiple sinks are respectively connected to the multiple explosion-proof holes. The multiple detection parts are arranged in a one-to-one correspondence with the multiple sinks, and one end of each detection part is respectively arranged in the corresponding sink. In this way, the sink can be used to limit the installation position of one end of the detection part on the single cell to ensure that one end of the detection part can be set corresponding to the explosion-proof valve, thereby ensuring that the detection part can contact the airflow ejected from the explosion-proof hole when the explosion-proof valve explodes, and further ensuring that the color of the detection part can change when the explosion-proof valve explodes.

[0024] As an optional implementation of the embodiment of the present application, the battery module also includes multiple protective patches, which are respectively attached to the side of the multiple detection parts facing away from the explosion-proof valve, and the multiple protective patches are respectively located in the multiple sinks.

[0025] In this way, the protective patch can be used to protect one end of the detection piece and the explosion-proof valve, preventing sharp objects from damaging one end of the detection piece and the explosion-proof valve, or preventing foreign matter, dust, powder, electrolyte, etc. from falling into the explosion-proof valve and contaminating the explosion-proof valve, thereby helping to increase the service life of the explosion-proof valve. At the same time, the protective patch in this application is set in the sink. On the one hand, the sink can also be used to define the installation position of the protective patch on the single battery to ensure that the protective patch can be set corresponding to the explosion-proof valve, so that the protective patch can effectively protect the explosion-proof valve; on the other hand, the protective patch is set in the sink, which can prevent the protective patch from protruding from the surface of the single battery, so as to avoid the protective patch from colliding with other components and being damaged, that is, the sink can be used to play a certain protective role for the protective patch.

[0026] As an optional implementation of the embodiment of the present application, adsorption particles are provided on the inner surface of the protective cover, and the orthographic projection of the adsorption particles on the single cell is staggered with the orthographic projection of the explosion-proof valve on the single cell. In this way, the adsorption particles can be used to adsorb harmful substances in the airflow ejected from the explosion-proof hole to prevent the harmful gases generated by the single cell after thermal runaway from polluting the air and thus affecting human health; at the same time, the adsorption particles can also be used to adsorb external impurities, dust and liquids to prevent the above substances from contaminating or damaging the explosion-proof valve. At the same time, the orthographic projection of the adsorption particles on the single cell is staggered with the orthographic projection of the explosion-proof valve on the single cell. This can prevent the high-temperature and high-pressure airflow ejected from the explosion-proof hole from directly impacting the adsorption particles, causing the adsorption particles to detach from the inner surface of the protective cover, thereby preventing the adsorption particles from being discharged into the air with the high-temperature and high-pressure airflow and polluting the air.

[0027] As an optional embodiment of the present application, the battery module further includes an integrated busbar component, which extends along the preset direction and is stacked on the top surface of the plurality of single cells. One of the integrated busbar component and the protective cover is provided with a locking hole, and the other of the integrated busbar component and the protective cover is provided with a locking hook, and the locking hook is detachably connected to the locking hole. Research has found that when a single cell experiences thermal runaway, the explosion-proof valve of the single cell will burst open, allowing the high-temperature and high-pressure airflow within the single cell to flow out of the explosion-proof hole, thereby achieving a pressure relief effect to avoid explosion. During this process, the high-temperature and high-pressure airflow ejected from the explosion-proof hole will directly impact the protective cover, causing the protective cover to be easily worn. The detachable connection between the locking hook and the locking hole enables the detachable connection between the protective cover and the integrated busbar component, which not only facilitates the disassembly and assembly of the protective cover, but also facilitates the replacement of the protective cover with a new one when the protective cover is damaged, rather than the entire battery module, thereby helping to reduce the replacement cost of the battery module.

[0028] A second aspect of the present application discloses an energy storage device, comprising a housing and a battery module as described in any of the above items, wherein the battery module is internally housed within the housing. An energy storage device comprising a battery module as described in any of the above items can also reduce the cost of thermal runaway identification while improving the accuracy of thermal runaway identification. It can accurately locate and identify the individual battery cells experiencing thermal runaway, allowing for early and targeted fire extinguishing measures for the individual batteries experiencing thermal runaway, thereby significantly improving the safety of the energy storage device.

[0029] In a third aspect, the present application discloses an electrical device comprising an energy storage device as described in any of the above. Because the energy storage device has the same effects as the battery module described in any of the above, the electrical device comprising the energy storage device can also reduce the cost of thermal runaway identification while improving the accuracy of thermal runaway identification. It can accurately locate and identify the individual battery cells experiencing thermal runaway, allowing for early and targeted fire extinguishing measures for the individual batteries experiencing thermal runaway, thereby significantly improving the safety of the energy storage device.

[0030] Compared with the prior art, this application has the following beneficial effects:

[0031] The battery module, energy storage device, and electrical equipment provided in the embodiments of the present application are provided with a detection member at the explosion-proof hole of each single cell. One end of each detection member is sealed at the corresponding explosion-proof hole and located above the corresponding explosion-proof valve, and the other end of each detection member is exposed outside the protective cover through a through hole in the protective cover to avoid being blocked by the protective cover. At the same time, when the explosion-proof valve at the explosion-proof hole explodes, the airflow ejected from the explosion-proof hole will contact the detection member, and the ejected airflow will include acidic electrolyte. When the detection member encounters the acidic electrolyte, its color will change. That is, when the explosion-proof valve at the explosion-proof hole opens, the color of the detection member provided at the explosion-proof hole will change. In this way, whether the explosion-proof valve has exploded can be determined by observing whether the color of the portion of the detection member located outside the protective cover has changed, thereby accurately locating and identifying which single cell has experienced thermal runaway, and then early and targeted fire extinguishing measures can be implemented for the single cell experiencing thermal runaway, thereby greatly improving the safety of the energy storage device. In addition, since the present application determines whether thermal runaway has occurred in a single cell by determining whether the color of the detection part has changed, the cost of the detection part is relatively low. Therefore, the technical solution of the present application can accurately determine which single cell has experienced thermal runaway, thereby improving the accuracy of thermal runaway identification and reducing the cost of thermal runaway identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] FIG1 is a schematic structural diagram of a battery module disclosed in an embodiment of the present application;

[0034] FIG2 is a cross-sectional view of the battery module along the line MM in FIG1 when the explosion-proof valve disclosed in an embodiment of the present application is not exploded;

[0035] FIG3 is a cross-sectional view of the battery module along the line MM in FIG1 when the explosion-proof valve disclosed in an embodiment of the present application explodes;

[0036] FIG4 is a partial enlarged view of point A in FIG1 ;

[0037] FIG5 is a schematic diagram of the exploded structure of the battery module when the explosion-proof valve disclosed in the embodiment of the present application is not exploded;

[0038] FIG6 is a partial enlarged view of point B in FIG5 ;

[0039] FIG7 is a partial enlarged view of point C in FIG5 ;

[0040] FIG8 is a schematic structural diagram of a detection member and a tensile film disclosed in an embodiment of the present application;

[0041] FIG9 is a schematic structural diagram of a detection element disclosed in an embodiment of the present application;

[0042] FIG10 is a schematic structural diagram of a battery module when the explosion-proof valve disclosed in an embodiment of the present application explodes and the protective cover is not shown;

[0043] FIG11 is a partial enlarged view of point E in FIG10 ;

[0044] FIG12 is a schematic structural diagram of a single cell disclosed in an embodiment of the present application;

[0045] FIG13 is a partial enlarged view of point F in FIG12;

[0046] FIG14 is a schematic structural diagram of a movable baffle disclosed in an embodiment of the present application;

[0047] FIG15 is a schematic structural diagram of an energy storage device disclosed in an embodiment of the present application;

[0048] FIG16 is a schematic structural diagram of an electric vehicle according to an embodiment of the present application;

[0049] FIG17 is a structural diagram of a household energy storage system in which the electrical equipment disclosed in an embodiment of the present application is a household energy storage system.

[0050] Explanation of Main Reference Numerals: 10 - battery module; 11 - single cell; 111 - explosion-proof hole; 112 - sink; 113 - axial hole; 12 - explosion-proof valve; 13 - protective cover; 13a - bottom wall; 13b - side wall; 131 - vent; 132 - through hole; 133 - adsorption particles; 134 - locking hole; 14 - detection element; 141 - fitting portion; 142 - handheld portion; 1421 - installation mark; 1422 - connecting surface; 143 - one-way limiting structure; 143a - latch; 1431 - first surface; 1432 - second surface; 15 - integrated busbar; 151 - locking hook; 16 - tensile film; 17 - protective patch; 18 - movable baffle; 181 - rotating shaft; 20 - energy storage device; 21 - box; 30 - container; 31 - container body; 32 - battery rack; 40-Household energy storage system; 41-Electric energy conversion device; 42-User load. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0053] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0054] Furthermore, the terms "installed," "disposed," "provided with," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integral structures; mechanical connections or electrical connections; direct connections, indirect connections through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0055] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0056] The technical solution of the present application will be further described below with reference to the embodiments and drawings.

[0057] Please refer to Figures 1 to 4. An embodiment of the first aspect of the present application discloses a battery module. The battery module 10 includes multiple single cells 11, multiple explosion-proof valves 12, at least one protective cover 13 and multiple detection parts 14. The multiple single cells 11 are arranged in sequence along a preset direction (for example, the Y0-Y1 direction in Figure 1), and the multiple single cells 11 are all provided with explosion-proof holes 111. The multiple explosion-proof valves 12 are respectively arranged in the multiple explosion-proof holes 111. The protective cover 13 is arranged above the multiple explosion-proof valves 12, and the protective cover 13 is provided with a vent 131, so that when the explosion-proof valve 12 explodes, the high-temperature and high-pressure airflow in the single cell 11 can pass through the vent 131 to the outside of the protective cover 13. The protective cover 13 is further provided with a plurality of through holes 132 arranged at intervals, and a plurality of detection members 14 are respectively passed through the plurality of through holes 132, and one end of the plurality of detection members 14 is respectively located in the protective cover 13, and one end of the plurality of detection members 14 is respectively sealed at the plurality of explosion-proof holes 111, so that each detection member 14 can be configured as a component that changes color when encountering electrolyte, so as to detect the explosion of the explosion-proof valve 12 by the color change of the detection member 14, and at the same time, the other ends of the plurality of detection members 14 are respectively located outside the protective cover 13, so that the other ends of the detection members 14 can be exposed outside the protective cover 13 to avoid the other ends of the detection members 14 being blocked by the protective cover 13, so that whether the explosion-proof valve 12 is exploded can be judged by observing the color change of the other end of the detection member 14, because when the explosion-proof valve at the explosion-proof hole 111 is After the explosion of the explosion-proof valve 12 at the explosion-proof hole 111, the airflow ejected from the explosion-proof hole 111 will come into contact with the detection member 14. The ejected airflow will contain an acidic electrolyte. When the detection member 14 encounters the acidic electrolyte, its color will change. That is, when the explosion-proof valve 12 at the explosion-proof hole 111 is opened, the color of the detection member 14 set at the explosion-proof hole 111 will change. Therefore, it is possible to determine whether the explosion-proof valve 12 has exploded by observing whether the color of the portion of the detection member 14 located outside the protective cover 13 has changed. This can accurately locate and identify which single cell 11 has experienced thermal runaway, and then implement fire extinguishing measures for the single cell 11 that has experienced thermal runaway in a timely and targeted manner. This can greatly improve the safety of the energy storage device, and can accurately replace the problematic single cell 11, thereby improving the replacement efficiency of the battery module 10. Among them, the above-mentioned preset direction can be parallel to the length direction of the single cell 11, or it can be parallel to the width direction of the single cell 11.

[0058] In addition, since the battery module 10 of the present application determines whether thermal runaway occurs in the single cell 11 by whether the color of the detection part 14 changes, the cost of the detection part 14 is relatively low. Therefore, the technical solution of the present application can accurately determine which single cell 11 has thermal runaway, thereby improving the accuracy of thermal runaway identification and reducing the cost of thermal runaway identification.

[0059] As can be understood, as shown in FIG2 , when the explosion-proof valve 12 of the single battery 11 has not exploded, the detection member 14 will not come into contact with the electrolyte, and thus the color of the detection member 14 will not change. However, as shown in FIG3 , when thermal runaway occurs in the single battery 11, the explosion-proof valve 12 will be opened by the high-temperature, high-pressure airflow within the single battery 11. The high-temperature, high-pressure airflow can then be ejected from the explosion-proof hole 111 and contact one end of the detection member 14, causing one end of the detection member 14 to be stained with the acidic electrolyte, thereby showing a different color. The color of the detection member 14 will spread. When the color spreads to the other end of the detection member 14 located outside the protective cover 13, the operator can directly detect the color change of the detection member 14 through external observation, and can accurately locate which single battery 11 has experienced thermal runaway, and then can implement fire extinguishing measures for the single battery 11 that has experienced thermal runaway in a timely and targeted manner, thereby greatly improving the safety of the energy storage device.

[0060] In an exemplary embodiment, the detection member 14 can be a pH test paper, so that the acidic properties of the electrolyte and the pH test paper can be used to detect the explosion-proof condition of the explosion-proof valve. That is, when the explosion-proof valve 12 of the single battery 11 has not exploded, the detection member 14 will not come into contact with the electrolyte, so that the color of the detection member 14 will not change; and when the single battery 11 has thermal runaway, the explosion-proof valve 12 will be opened by the high-temperature and high-pressure airflow in the single battery 11, and the high-temperature and high-pressure airflow can be ejected from the explosion-proof hole 111 and will come into contact with one end of the detection member 14, so that the acidic electrolyte is stained on one end of the detection member 14 and turns red, and then the color change of the detection member 14 can be used to accurately locate which single battery 11 has thermal runaway. In another exemplary embodiment, the detection member 14 The material can be a material that changes color when exposed to water, such as water-color-changing ink, anhydrous cobalt chloride, etc., so that the liquid properties of the electrolyte and the pH test paper can be used to detect the explosion-proof condition of the explosion-proof valve. That is, when the explosion-proof valve 12 of the single battery 11 has not exploded, the detection component 14 will not come into contact with the electrolyte, so that the detection component 14 can still remain dry and will not become wet; when the single battery 11 has a thermal runaway, the explosion-proof valve 12 will be opened by the high-temperature and high-pressure airflow in the single battery 11, and the high-temperature and high-pressure airflow can be ejected from the explosion-proof hole 111 and will contact one end of the detection component 14, so that the one end of the detection component 14 will be wetted by the electrolyte and change color, and then the color change of the detection component 14 can be used to accurately locate which single battery 11 has experienced thermal runaway. With this arrangement, this embodiment does not require the use of external instruments to detect leakage. The detection result of the detection member 14 can be directly displayed through the color change of the detection member 14, allowing the operator to visually know the explosion status of the explosion-proof valve 12.

[0061] In this embodiment, the protective cover 13 can be one or more. When there are multiple protective covers 13, the multiple protective covers 13 are respectively arranged above the multiple explosion-proof valves 12; and as shown in Figures 1 and 5, when there is only one protective cover 13, the protective cover 13 is extended along a preset direction (for example, the Y0-Y1 direction in Figures 1 and 5) to cover the multiple explosion-proof valves 12, and the protective cover 13 is formed with the said air vents 131 at both ends in the preset direction, so that when the single cell 11 has thermal runaway, the high-temperature and high-level airflow in the single cell 11 can flow to the outside of the protective cover 13 through the explosion-proof hole 111 and the air vent 131 in sequence.

[0062] In some embodiments, the inner surface of the protective cover 13 is provided with adsorbent particles 133. The adsorbent particles 133 may be activated carbon, activated carbon fiber, zeolite, or a coal-based adsorbent. In this manner, the adsorbent particles 133 can be used to adsorb harmful substances in the airflow ejected from the explosion-proof hole 111, thereby preventing harmful gases generated by the battery cells 11 after thermal runaway from polluting the air and thus affecting human health. The adsorbent particles 133 can also be used to adsorb external impurities, dust, and liquids, thereby preventing these substances from contaminating or damaging the explosion-proof valve 12. Furthermore, the orthographic projection of the adsorbent particles 133 on the battery cells 11 is staggered from the orthographic projection of the explosion-proof valve 12 on the battery cells 11. This prevents the high-temperature, high-pressure airflow ejected from the explosion-proof hole 111 from directly impacting the adsorbent particles 133, thereby preventing the adsorbent particles 133 from separating from the inner surface of the protective cover 13. This prevents the adsorbent particles 133 from being discharged into the air along with the high-temperature, high-pressure airflow and thereby polluting the air.

[0063] Exemplarily, as shown in Figures 5 and 6, the protective cover 13 may include a bottom wall 13a and two side walls 13b. The bottom wall 13a and the two side walls 13b are extended along a preset direction, and the bottom wall 13a is arranged toward the explosion-proof valve 12. At least one of the two side walls 13b is provided with adsorption particles 133, that is, one and only one side wall 13b can be provided with adsorption particles 133, or both side walls 13b can be provided with adsorption particles 133 at the same time.

[0064] In some embodiments, in combination with Figures 4 to 7, the battery module 10 also includes an integrated busbar component (Cell Connector System, CCS for short) 15, which extends along a preset direction and is stacked on the top surface of multiple single cells 11. One of the integrated busbar component 15 and the protective cover 13 is provided with a locking hole 134, and the other of the integrated busbar component 15 and the protective cover 13 is provided with a locking hook 151, that is, when the integrated busbar component 15 is provided with a locking hook 151, the protective cover 13 is provided with a locking hole 134, and when the integrated busbar component 15 is provided with a locking hole 134, the protective cover 13 is provided with a locking hook 151, and the locking hook 151 is detachably connected to the locking hole 134, thereby enabling the protective cover 13 to be detachably connected to the integrated busbar component 15. Research has found that when a single cell 11 experiences thermal runaway, the explosion-proof valve 12 of the single cell 11 will burst open, allowing the high-temperature and high-pressure airflow in the single cell 11 to flow out from the explosion-proof hole 111, thereby achieving a pressure relief effect to avoid explosion. In this process, the high-temperature and high-pressure airflow ejected from the explosion-proof hole 111 will directly impact the protective cover 13, making the protective cover 13 prone to wear. The detachable connection between the locking hook 151 and the locking hole 134 is achieved to realize the detachable connection between the protective cover 13 and the integrated busbar 15, which not only facilitates the disassembly and assembly of the protective cover 13, but also facilitates the replacement of the new protective cover 13 when the protective cover 13 is damaged, instead of the entire battery module 10, thereby helping to reduce the replacement cost of the battery module 10.

[0065] In some embodiments, as shown in conjunction with Figures 6 to 8 , a tensile film 16 is provided on the side of each detection member 14 facing away from the explosion-proof valve 12. Providing the tensile film 16 on the side of the detection member 14 facing away from the explosion-proof valve 12 can prevent the tensile film 16 from blocking the detection member 14, thereby ensuring that the detection member 14 can come into contact with the acidic electrolyte mixed in the airflow. At the same time, the tensile strength of the detection member 14 is improved, thereby preventing the detection member 14 from being torn off and detaching from the through hole 132 of the protective cover 13 when the explosion-proof valve 12 explodes. This ensures that after the detection member 14 comes into contact with the acidic electrolyte and undergoes a color change, the changed color can diffuse to the other end of the detection member 14 located outside the protective cover 13, thereby ensuring that the color change at the other end of the detection member 14 located outside the protective cover 13 can be observed to determine which single battery 11 has experienced thermal runaway.

[0066] In some embodiments, each single battery 11 is provided with a sink 112, and the multiple sinks 112 are respectively connected to the multiple explosion-proof holes 111, and the multiple detection parts 14 are arranged in a one-to-one correspondence with the multiple sinks 112, and one end of each detection part 14 is respectively arranged in the corresponding sink 112. In this way, the sink 112 can be used to define the installation position of one end of the detection part 14 on the single battery 11, so as to ensure that one end of the detection part 14 can be set corresponding to the explosion-proof valve 12, thereby ensuring that the detection part 14 can contact the airflow ejected from the explosion-proof hole 111 when the explosion-proof valve 12 explodes, and further ensuring that the color of the detection part 14 can change when the explosion-proof valve 12 explodes.

[0067] In some embodiments, in combination with Figures 5 to 8, the battery module 10 also includes a plurality of protective patches 17, and the plurality of protective patches 17 are respectively attached to the side of the plurality of detection parts 14 facing away from the explosion-proof valve 12, and the plurality of protective patches 17 are respectively located in a plurality of sinks 112. In this way, the protective patches 17 can be used to protect one end of the detection part 14 and the explosion-proof valve 12, thereby preventing sharp objects from damaging one end of the detection part 14 and the explosion-proof valve 12, or preventing foreign matter, dust, powder, electrolyte, etc. from falling into the explosion-proof valve 12 and contaminating the explosion-proof valve 12, thereby helping to improve the service life of the explosion-proof valve 12. At the same time, the protection patch 17 in the present application is arranged in the groove 112. On the one hand, the groove 112 can also be used to define the installation position of the protection patch 17 on the single battery 11 to ensure that the protection patch 17 can be arranged corresponding to the explosion-proof valve 12, so that the protection patch 17 can effectively protect the explosion-proof valve 12; on the other hand, the protection patch 17 is arranged in the groove 112, which can prevent the protection patch 17 from protruding from the surface of the single battery 11, so as to prevent the protection patch 17 from colliding with other components and being damaged, that is, the groove 112 can be used to provide a certain protection for the protection patch 17.

[0068] During assembly, one end of the detection part 14 can be passed through the through hole 132 on the protective cover 13 first, so that the detection part 14 is inserted into the through hole 132 of the protective cover 13, and then the locking hole 134 of the protective cover 13 and the locking hook 151 of the integrated busbar part 15 are fastened together, and finally one end of the detection part 14 is sealed at the explosion-proof hole 111, or one end of the detection part 14 can be passed through the through hole 132 on the protective cover 13 first, so that the detection part 14 is inserted into the through hole 132 of the protective cover 13, and then one end of the detection part 14 is sealed at the explosion-proof hole 111, and finally the locking hole 134 of the protective cover 13 and the locking hook 151 of the integrated busbar part 15 are fastened together.

[0069] In some embodiments, in combination with Figures 6 to 9, the detection part 14 includes a fitting portion 141 and a hand-held portion 142, the fitting portion 141 is fitted at the explosion-proof hole 111, for example, the fitting portion 141 can be fitted in the sink 112, and the protective patch 17 can be fitted on the side of the fitting portion 141 facing away from the explosion-proof valve 12, the hand-held portion 142 is passed through the through hole 132, and one end of the hand-held portion 142 is located inside the protective cover 13 and connected to the fitting portion 141, and the other end of the hand-held portion 142 is located outside the through hole 132 and outside the protective cover 13; and an installation mark 1421 is provided on the hand-held portion 142, and the installation mark 1421 can be an identification hole, an identification protrusion, text, a pattern, an icon, or other symbols that can serve as an identification.

[0070] During assembly, the detection member 14 is first inserted into the through hole 132, and then the fitting portion 141 of the detection member 14 is fitted onto the explosion-proof hole 111. If, when the handheld portion 142 of the handheld detection member 14 is inserted into the fitting portion 141 through the through hole 132, the length of the portion of the detection member 14 inserted into the protective cover 13 is too short, it will make it difficult for the fitting portion 141 to fit into the explosion-proof hole 111. It is necessary to insert the detection member 14 into the protective cover 13 through the through hole 132 again, and adjust the length of the portion of the detection member 14 inserted into the protective cover 13 back and forth, which is rather troublesome. By providing an installation mark 1421 on the hand-held portion 142, the installation mark 1421 can serve as a mark for the detection piece 14 to stop after being inserted into the through hole 132 and inserted into the protective cover 13 to a certain extent. Therefore, when the detection piece 14 is inserted into the through hole 132 until the installation mark 1421 is located, the action of further inserting the detection piece 14 into the protective cover 13 can be stopped. Then, the installation mark 1421 can be used as an installation positioning prompt for the detection piece 14. In this way, the detection piece 14 can be inserted into the protective cover 13 in one step without having to adjust the length of the part of the detection piece 14 inserted into the protective cover 13 back and forth, thereby saving assembly time and improving assembly efficiency.

[0071] When the airflow is ejected from the explosion-proof hole 111, the electrolyte first touches the fitting portion 141 of the detection component 14, and the fitting portion 141 of the detection component 14 begins to change color and extends and diffuses toward the side of the handheld portion 142, so that the color of the handheld portion 142 also changes.

[0072] In some embodiments, the handheld portion 142 may be connected to a one-way limiting structure 143, which is used to only allow the handheld portion 142 to move in one direction relative to the through hole 132 from the outside of the protective cover 13 to the inside of the protective cover 13. That is, when the handheld portion 142 is held by the handheld portion 142 to insert the detection member 14 into the protective cover 13 through the through hole 132, the detection member 14 can be pushed into the inside of the protective cover 13, and when the handheld portion 142 is held by the handheld portion 142 to pull the detection member 14 out of the protective cover 13, the detection member 14 cannot be pulled out of the protective cover 13 due to the limiting action of the one-way limiting structure 143. In this way, on the one hand, When the detection member 14 is inserted into the through hole 132, it is prevented that the hand-held portion 142 is pulled out of the protective cover 13 by mistake when the battery module 10 is hoisted or the wiring harness is assembled to the integrated busbar 15, thereby causing the detection member 14 to be pulled out and the detection member 14 to be broken, or the fitting portion 141 of the detection member 14 is opened, thereby causing the protective patch 17 to be opened, thereby preventing the explosion-proof valve 12 from being exposed, and further preventing sharp objects from damaging the explosion-proof valve 12, or preventing foreign matter, dust, powder, electrolyte, etc. from falling into the explosion-proof valve 12 and contaminating the explosion-proof valve 12, thereby improving the service life of the explosion-proof valve 12; on the other hand, when the explosion-proof valve 12 After the explosion, the detection part 14 may be further pulled into the protective cover 13 or broken by the impact of the airflow. At this time, the detection part 14 will be subjected to a reverse force and tend to move to the outside of the protective cover 13. The one-way limiting structure 143 can prevent the detection part 14 from moving to the outside of the protective cover 13, thereby preventing the detection part 14 from detaching from the through hole 132 of the protective cover 13 when the explosion-proof valve 12 explodes.

[0073] In some embodiments, in combination with Figures 6 to 9, the surface of the hand-held portion 142 connected to the one-way limiting structure 143 is a connecting surface 1422, and the one-way limiting structure 143 includes a plurality of latches 143a, and the plurality of latches 143a are arranged in sequence along the moving direction of the hand-held portion 142 relative to the through hole 132, and each latch 143a includes a first surface 1431 and a second surface 1432 opposite to each other in the moving direction, and the plurality of first surfaces 1431 and the plurality of second surfaces 1432 are alternately arranged. For adjacent first surfaces 1431 and second surfaces 1432, in the moving direction, the first surface 1431 is closer to the fitting portion 141 than the second surface 1432, and each first surface 1431 is The first surface 1431 is a guide bevel disposed at an obtuse angle to the connecting surface 1422, so that when the detection member 14 is pushed into the protective cover 13, the first surface 1431 will not be stopped and limited by the outer surface of the protective cover 13, so that the hand-held portion 142 of the detection member 14 can move relative to the through hole 132 from the outside of the protective cover 13 to the inside of the protective cover 13. Each second surface 1432 is disposed at an acute angle or a right angle to the connecting surface 1422, so that when the detection member 14 is pulled out of the protective cover 13, the first surface 1431 will be stopped and limited by the outer surface of the protective cover 13, so that the hand-held portion 142 of the detection member 14 cannot move relative to the through hole 132 from the inside of the protective cover 13 to the outside of the protective cover 13, thereby achieving unidirectional movement of the hand-held portion 142. The one-way limiting structure 143 with the above-mentioned structure is relatively simple in structure, easy to implement and convenient to process, and helps to maintain the cost of the detection member 14 within a relatively low range.

[0074] For example, the angle θ1 between the first surface 1431 and the connecting surface 1422 may be 110°, 120°, 150° or 165°, etc., and the angle θ2 between the second surface 1432 and the connecting surface 1422 may be 45°, 50°, 60°, 70°, 75°, 80° or 90°, etc.

[0075] Of course, in other embodiments, the first surface 1431 may also be a guide arc surface, and the angle between the tangent of the guide arc surface and the connecting surface 1422 is an obtuse angle.

[0076] It is worth noting that when the hand-held portion 142 can only move in one direction relative to the through hole 132 from outside the protective cover 13 to inside the protective cover 13, the installation mark 1421 on the hand-held portion 142 can avoid the situation where the length of the portion of the detection part 14 exposed outside the protective cover 13 is too short after the PH is excessively stuffed into the protective cover 13 during assembly, and the length of the portion of the detection part 14 exposed outside the protective cover 13 cannot be adjusted by pulling the detection part 14 out of the protective cover 13.

[0077] In some embodiments, as shown in Figures 10 and 11, the battery module 10 further includes a movable baffle 18, which is rotatably connected to the single battery 11. The movable baffle 18 can be rotated relative to the single battery 11 to cover the explosion-proof hole 111 or to open the explosion-proof hole 111. The detection member 14 is connected to the surface of the movable baffle 18 facing the explosion-proof valve 12, so that when the explosion-proof valve 12 explodes, the high-temperature and high-pressure airflow in the single battery 11 breaks through the explosion-proof valve 12 and contacts the fitting portion 141 of the detection member 14, so that the fitting portion 141 of the detection member 14 is stained with acidic electrolyte and changes color, and at the same time acts on the fitting portion 141 and the movable baffle 18, so that the movable baffle 18 The baffle 18 rotates relative to the single battery 11 to open the explosion-proof hole 111. At the same time, the fitting portion 141 of the detection piece 14 rotates relative to the single battery 11 together with the movable baffle 18, so that the detection piece 14 is further pulled into the protective cover 13, so that the length of the portion of the detection piece 14 exposed outside the protective cover 13 becomes shorter. In this way, not only can the color change of the detection piece 14 be used to determine in which single battery 11 the thermal runaway occurs, but the length change of the portion of the detection piece 14 exposed outside the protective cover 13 can also be used to identify which battery cell the thermal runaway occurs. In this way, it is possible to identify which battery cell the thermal runaway occurs from multiple dimensions, which is beneficial to improve the accuracy of thermal runaway identification.

[0078] In addition, since the fitting portion 141 of the detection member 14 is fitted to the surface of the movable baffle 18 facing the explosion-proof valve 12, the movable baffle 18 can be used to enhance the structural strength of the fitting portion 141 to prevent the fitting portion 141 from being broken by the airflow ejected from the explosion-proof valve 12.

[0079] It is worth noting that when the hand-held portion 142 is provided with an installation mark 1421, the action of further inserting the detection member 14 into the protective cover 13 can be stopped when the detection member 14 is inserted until the installation mark 1421 is located at the through hole 132. In this way, when the explosion-proof valve 12 explodes, the fitting portion 141 of the detection member 14 will rotate relative to the single battery 11 together with the movable baffle 18, so that the detection member 14 is further pulled into the protective cover 13, so that the installation mark 1421 is located inside the protective cover 13. At this time, the installation mark 1421 will not be visible. In this way, whether the length of the part of the detection member 14 exposed outside the protective cover 13 has shortened can be judged by whether the installation mark 1421 can be seen, so that it is easier to identify in which battery cell the thermal runaway occurs by the change in the length of the part of the detection member 14 exposed outside the protective cover 13.

[0080] Optionally, as shown in Figures 12 to 14, one of the movable baffle 18 and the single battery 11 is provided with a rotating shaft 181, and the other of the movable baffle 18 and the single battery 11 is provided with an axial hole 113. That is, when the movable baffle 18 is provided with the rotating shaft 181, the single battery 11 is provided with the axial hole 113, and when the movable baffle 18 is provided with the axial hole 113, the single battery 11 is provided with the rotating shaft 181, and the rotating shaft 181 is rotatably inserted into the axial hole 113. The mutual cooperation between the rotating shaft 181 and the axial hole 113 to achieve the rotational connection between the movable baffle 18 and the single battery 11 can make the connection between the movable baffle 18 and the single battery 11 more secure and reliable, and not easy to fall off.

[0081] Of course, it is understood that in other embodiments, the movable baffle 18 can also be rotatably connected to the single battery 11 or the explosion-proof valve 12 via a flexible adhesive strip, a hinge structure, or a hinge structure. Commonly used flexible adhesive strips include cloth-based adhesive, kraft adhesive, and transparent tape.

[0082] Referring to FIG. 15 , an embodiment of the second aspect of the present application discloses an energy storage device. The energy storage device 20 includes a housing 21 and the battery module 10 described above, wherein the battery module 10 is built into the housing 21. It is understood that the energy storage device 20 including the battery module 10 described above can provide the same or similar benefits as the battery module 10 described above. For details, please refer to the description of the embodiment of the battery module 10 and will not be repeated here.

[0083] In a third aspect, the present application discloses an electrical device having an energy storage device as described above. It is understood that, since the energy storage device can provide the same or similar beneficial effects as a battery module, the electrical device can also provide the same or similar beneficial effects as a battery module. For details, please refer to the description of the battery module embodiment, which will not be repeated here.

[0084] The electrical equipment in this embodiment can be but is not limited to containers, household energy storage systems, battery vehicles, electric vehicles, ships, spacecraft, electric toys and electric tools, etc., where spacecraft include airplanes, rockets, space shuttles and spacecraft, etc., electric toys include fixed or mobile electric toys, such as electric car toys, electric ship toys and electric airplane toys, etc., and electric tools include metal cutting power tools, grinding power tools, assembly power tools and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers.

[0085] In an exemplary embodiment, as shown in FIG16 , when the electrical equipment is a container 30, the container 30 may include a container body 31, a battery rack 32, and a plurality of energy storage devices 20 as described above. The battery rack 32 is arranged in the container body 31 and has a gap with the side wall of the container body 31. The plurality of energy storage devices 20 are all placed in the battery rack 32, wherein the battery rack 32 and the energy storage device 20 may constitute a battery cluster.

[0086] In another exemplary embodiment, as shown in FIG17 , when the electrical equipment is a household energy storage system 40, the household energy storage system 40 may include an electric energy conversion device 41, a user load 42, and the energy storage device 20 as described above. The energy storage device 20 stores the electric energy of the electric energy conversion device 41 and transmits the electric energy to the user load 42. Alternatively, the electric energy conversion device 41 may be a photovoltaic panel, and the user load 42 may include street lamps and household appliances (not shown). The energy storage device 20 may be a small energy storage box that can be mounted on an outdoor wall in a wall-mounted manner. The photovoltaic panel can convert solar energy into electric energy during periods of low electricity prices. The energy storage device 20 is used to store the electric energy and supply it to street lamps and household appliances for use during peak electricity prices, or to provide power when the power grid is out of power.

[0087] The above is a detailed introduction to a battery module, energy storage device and electrical equipment disclosed in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the battery module, energy storage device and electrical equipment of the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A battery module, characterized in that: include: A plurality of single cells (11), the plurality of single cells (11) being arranged in sequence along a preset direction, and the plurality of single cells (11) are each provided with an explosion-proof hole (111); a plurality of explosion-proof valves (12), wherein the plurality of explosion-proof valves (12) are respectively arranged in the plurality of explosion-proof holes (111); A protective cover (13), the protective cover (13) being arranged above the plurality of explosion-proof valves (12), and the protective cover (13) being provided with a plurality of through holes (132) arranged at intervals; and; A plurality of detection members (14), the plurality of detection members (14) are respectively inserted into the plurality of through holes (132), one end of the plurality of detection members (14) is respectively located in the protective cover (13) and respectively sealed at the plurality of explosion-proof holes (111), the other end of the plurality of detection members (14) is respectively located outside the protective cover (13), each of the detection members (14) is configured as a member that changes color when encountering electrolyte, so as to detect the explosion of the explosion-proof valve (12) through the color change of the detection member (14).

2. The battery module according to claim 1, characterized in that: The detection member (14) comprises a fitting portion (141) and a hand-held portion (142), wherein the fitting portion (141) is fitted on the explosion-proof hole (111), the hand-held portion (142) is inserted into the through hole (132), one end of the hand-held portion (142) is located inside the protective cover (13) and connected to the fitting portion (141), and the other end of the hand-held portion (142) is located outside the protective cover (13); The handheld portion (142) is provided with a mounting mark (1421).

3. The battery module according to claim 1, characterized in that: The detection member (14) comprises a fitting portion (141) and a hand-held portion (142), wherein the fitting portion (141) is fitted on the explosion-proof hole (111), the hand-held portion (142) is inserted into the through hole (132), one end of the hand-held portion (142) is located inside the protective cover (13) and connected to the fitting portion (141), and the other end of the hand-held portion (142) is located outside the protective cover (13); The hand-held portion (142) is connected to a one-way limiting structure (143), and the one-way limiting structure (143) is used to only allow the hand-held portion (142) to move in one direction relative to the through hole (132) from outside the protective cover (13) to inside the protective cover (13).

4. The battery module according to claim 3, characterized in that: The surface of the hand-held portion (142) connected to the one-way limiting structure (143) is a connecting surface (1422). The one-way limiting structure (143) includes a plurality of latch teeth (143a). The plurality of latch teeth (143a) are arranged in sequence along the moving direction of the hand-held portion (142) relative to the through hole (132). Each of the latch teeth (143a) includes a first surface (1431) and a second surface (1432) that are opposite to each other in the moving direction. The plurality of first surfaces (1431) and second surfaces (1432) are arranged in sequence along the moving direction of the hand-held portion (142). The plurality of second surfaces (1432) are alternately arranged, and for adjacent first surfaces (1431) and second surfaces (1432), in the moving direction, the first surface (1431) is closer to the fitting portion (141) than the second surface (1432), and each of the first surfaces (1431) is a guiding inclined surface arranged at an obtuse angle to the connecting surface (1422), and each of the second surfaces (1432) is arranged at an acute angle or a right angle to the connecting surface (1422).

5. The battery module according to claim 1, characterized in that: The battery module (10) further comprises a movable baffle (18), the movable baffle (18) being rotatably connected to the single battery (11), the movable baffle (18) being capable of rotating relative to the single battery (11) to cover the explosion-proof hole (111) or to open the explosion-proof hole (111), and the detection element (14) being connected to a surface of the movable baffle (18) facing the explosion-proof valve (12).

6. The battery module according to claim 5, characterized in that: One of the movable baffle (18) and the single battery (11) is provided with a rotating shaft (181), and the other of the movable baffle (18) and the single battery (11) is provided with an axial hole (113), and the rotating shaft (181) is rotatably inserted into the axial hole (113).

7. The battery module according to any one of claims 1 to 6, characterized in that: A tensile film (16) is provided on the side of each detection element (14) facing away from the explosion-proof valve (12).

8. The battery module according to any one of claims 1 to 6, characterized in that: Each of the single cells (11) is provided with a sink (112); the plurality of sinks (112) are respectively connected to the plurality of explosion-proof holes (111); the plurality of detection elements (14) are arranged in one-to-one correspondence with the plurality of sinks (112); and one end of each of the detection elements (14) is respectively arranged in the corresponding sink (112).

9. The battery module according to claim 8, characterized in that: The battery module (10) further comprises a plurality of protective patches (17), wherein the plurality of protective patches (17) are respectively attached to a side of the plurality of detection elements (14) that faces away from the explosion-proof valve (12), and the plurality of protective patches (17) are respectively located in the plurality of sinks (112).

10. The battery module according to any one of claims 1 to 6, characterized in that: Adsorption particles (133) are arranged on the inner surface of the protective cover (13), and the orthographic projection of the adsorption particles (133) on the single battery (11) and the orthographic projection of the explosion-proof valve (12) on the single battery (11) are arranged staggered.

11. The battery module according to any one of claims 1 to 6, characterized in that: The battery module (10) further comprises an integrated busbar component (15), wherein the integrated busbar component (15) extends along the preset direction and is stacked on the top surface of the plurality of single cells (11), wherein one of the integrated busbar component (15) and the protective cover (13) is provided with a locking hole (134), and the other of the integrated busbar component (15) and the protective cover (13) is provided with a locking hook (151), wherein the locking hook (151) is detachably connected to the locking hole (134).

12. An energy storage device, characterized in that: The energy storage device (20) comprises a box (21) and a battery module (10) according to any one of claims 1 to 11, wherein the battery module (10) is built in the box (21).

13. An electrical equipment, characterized in that: The electrical consumer comprises an energy storage device (20) as claimed in claim 12.

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