Battery and electric device

Abstract

The utility model relates to a battery and a power utilization device, which comprises a plurality of layers of battery modules which are sequentially stacked along the Z direction, each layer of battery module comprises a plurality of battery monomers, one side of each battery monomer along the Z direction is provided with an anti-explosion valve, and the Z direction is the height direction of the battery module; the first cold plates are arranged between every two adjacent layers of battery modules, and the anti-explosion valves are all arranged towards the first cold plates; wherein the first cold plate comprises a first plate body and fire fighting parts, and cooling flow channels are defined and formed between all the fire fighting parts and the first plate body; the fire fighting parts are in one-to-one correspondence with the anti-explosion valves, and the fire fighting parts are configured to open the cooling flow channels when the battery monomers are in thermal runaway so as to spray cooling liquid in the cooling flow channels to the anti-explosion valves. And the cooling liquid can quickly cool substances generated by thermal runaway, so that the thermal spread after the thermal runaway of the single battery is effectively inhibited.

Description

Technical Field

[0001] This utility model relates to the field of new energy technology, and in particular to a battery and an electrical device. Background Technology

[0002] With the rapid expansion and development of the new energy market, the market share of new energy vehicles is gradually increasing. As a result, the application of power batteries, the core component of new energy vehicles, is becoming increasingly widespread in people's lives.

[0003] To ensure batteries maintain good performance under various ambient temperatures, cold plates are commonly used to cool the individual battery cells. However, in traditional designs, the cold plate only cools the individual battery cells, and it cannot prevent the spread of thermal runaway when a battery cell experiences thermal runaway, resulting in low safety. Utility Model Content

[0004] Therefore, it is necessary to address the problem that the cold plate in the structure of traditional batteries cannot prevent the spread of thermal runaway, and to provide a battery and electrical device that can both cool the individual battery cells and prevent the spread of thermal runaway.

[0005] On one hand, this application provides a battery, comprising:

[0006] A battery module is stacked in multiple layers along the Z direction. Each layer of the battery module includes multiple battery cells. Each battery cell has an explosion-proof valve on one side along the Z direction. The Z direction is the height direction of the battery module.

[0007] The first cold plate is provided between every two adjacent battery modules, and the explosion-proof valves are all positioned facing the first cold plate.

[0008] The first cold plate includes a first plate body and a fire-fighting section, and all the fire-fighting sections are separated from the first plate body to form a cooling channel; the fire-fighting section corresponds one-to-one with the explosion-proof valve, and the fire-fighting section is configured to open the cooling channel when the battery cell experiences thermal runaway, so as to spray the coolant in the cooling channel to the explosion-proof valve.

[0009] In one embodiment, the fire protection unit is configured to connect to the cooling channel after the battery cell ruptures due to thermal runaway.

[0010] In one embodiment, the thickness of the fire protection section is less than the thickness of the first plate to form a recessed structure.

[0011] In one embodiment, a groove is provided on the inner bottom surface of the fire protection unit to form a thinning area of ​​the fire protection unit;

[0012] and / or

[0013] The fire-fighting section and the first plate define a receiving groove, which is configured to store ejected material used to break through the fire-fighting section.

[0014] In one embodiment, the explosion-proof valve is provided with a thinning section.

[0015] In one embodiment, each layer of the battery module includes at least one row of battery cells, and each row of battery cells includes a plurality of battery cells;

[0016] The battery also includes a second cold plate, the extension direction of which is the same as the extension direction of the battery cell row, and the second cold plate is provided on both sides of each row of battery cells.

[0017] In one embodiment, at least two partially adjacent second cold plates are connected to form a U-shaped structure;

[0018] and / or

[0019] The battery cell is cylindrical, and the second cold plate is bent and extended to form an arcuate groove adapted to fit the outer peripheral surface of the battery cell.

[0020] In one embodiment, the battery further includes a connector having a main inlet, a main outlet, three branch inlets, and three branch outlets, wherein the three branch inlets are all connected to the main inlet, and the three branch outlets are all connected to the main outlet.

[0021] The three branch inlets are respectively connected to the first inlet of the first cold plate, the second inlet of all the upper second cold plates adjacent to the first cold plate, and the third inlet of all the lower second cold plates adjacent to the first cold plate;

[0022] The three branch outlets are respectively connected to a first outlet of the first cold plate, a second outlet of all the upper second cold plates adjacent to the first cold plate, and a third outlet of all the lower second cold plates adjacent to the first cold plate.

[0023] In one embodiment, each of the second cold plates has an inlet channel and an outlet channel;

[0024] In the Z direction, the liquid inlet channel and the liquid outlet channel are located at both ends of the second cold plate, respectively.

[0025] On the other hand, this application also provides an electrical device including the battery described above.

[0026] Compared with the prior art, this application has the following beneficial effects:

[0027] In the aforementioned battery and electrical device, when a single battery cell experiences thermal runaway, the fire department can open the cooling channel, allowing coolant within the channel to be sprayed out and directed towards the explosion-proof valve of the battery cell. The coolant rapidly cools the substances generated during thermal runaway, effectively suppressing the spread of heat after thermal runaway from the battery cell. Therefore, the first cold plate in this application not only cools the battery cell but also prevents the spread of heat after thermal runaway from the battery cell, thus improving battery safety. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a partial structural diagram of a battery concealed housing provided in one embodiment of this application;

[0030] Figure 2 for Figure 1 A top view of the battery shown;

[0031] Figure 3 for Figure 1 The diagram shows the structure of a single battery cell in the battery shown.

[0032] Figure 4 for Figure 1 The diagram shows the structure of the battery display housing.

[0033] Figure 5 for Figure 1 The diagram shows the structure of the battery from another angle;

[0034] Figure 6 for Figure 1 A structural diagram of the first cold plate of the battery shown in the figure;

[0035] Figure 7 for Figure 5 A cross-sectional view of the structure shown;

[0036] Figure 8 for Figure 1 The diagram shows the structure of the battery cell that is hidden within the battery.

[0037] Figure 9 for Figure 8 A structural diagram of a portion of the battery shown;

[0038] Figure 10 for Figure 1The diagram shows the structure of the battery connector;

[0039] Figure 11 for Figure 8 The structure shown is illustrated from another perspective.

[0040] Explanation of reference numerals in the attached figures:

[0041] 100. Battery; 10. Battery module; 11. Battery cell array; 111. Battery cell; 112. Explosion-proof valve; 113. Thinning section; 20. First cold plate; 21. First plate; 22. Fire protection section; 23. Cooling channel; 24. Groove; 25. Receiving tank; 30. Second cold plate; 31. Liquid inlet channel; 32. Liquid outlet channel; 40. Connector; 41. Main inlet; 42. Main outlet; 43. Branch inlet; 44. Branch outlet; 50. Housing; 60. First connecting pipe; 70. Second connecting pipe; 80. Liquid inlet pipe; 90. Liquid outlet pipe. Detailed Implementation

[0042] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0043] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0047] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0048] See Figure 1 One embodiment of this application provides a battery 100, including a multi-layer battery module 10, which is stacked along the Z-direction. The Z-direction is the height direction of the battery module 10. (See reference...) Figure 2 and Figure 3 Each battery module 10 includes multiple battery cells 111. Each battery cell 111 has an explosion-proof valve 112 on one side along the Z direction. When the internal pressure of the battery cell 111 is too high or thermal runaway occurs, the explosion-proof valve 112 will automatically open to release the gas and heat accumulated inside, preventing the battery cell 111 from rupturing or exploding.

[0049] See Figure 4 The battery 100 also includes a housing 50, and the multi-layer battery modules 10 are stacked in the housing 50 along the Z direction. The housing 50 serves to support and protect the battery modules 10.

[0050] Continue reading Figure 1 and see Figure 5 The battery 100 also includes a first cold plate 20 disposed within the housing 50. A first cold plate 20 is provided between every two adjacent battery modules 10, and explosion-proof valves 112 are all positioned facing the first cold plate 20. In some embodiments, the battery 100 includes two battery modules 10, in which case the battery 100 includes one first cold plate 20 disposed between the two battery modules 10, and the explosion-proof valves 112 of both battery modules 10 are positioned facing the first cold plate 20. In other embodiments, the battery 100 includes more than two battery modules 10, in which case the number of first cold plates 20 is one less than the number of battery modules 10. The explosion-proof valves 112 of the battery cells 111 of the battery module 10 located between two first cold plates 20 can be positioned facing either the upper or lower first cold plate 20, and are not limited here.

[0051] Among them, see Figure 6 and Figure 7 The first cold plate 20 includes a first plate body 21 and a fire-fighting section 22, with a cooling channel 23 defined between the first plate body 21 and all the fire-fighting sections 22. Each fire-fighting section 22 is correspondingly positioned to connect with an explosion-proof valve 112. The fire-fighting section 22 is configured to open the cooling channel 23 when a battery cell 111 experiences thermal runaway; that is, when a battery cell 111 experiences thermal runaway, an opening is formed at the location of the fire-fighting section 22, allowing the cooling channel 23 to communicate with the outside. When the cooling channel 23 is open, it can spray coolant onto the corresponding explosion-proof valve 112 through the opening.

[0052] When a thermal runaway occurs in battery cell 111, the fire suppression unit 22 can open the cooling channel 23, allowing the coolant within the channel to be sprayed out and directed towards the explosion-proof valve 112 of the battery cell 111. The coolant rapidly cools the substances generated during thermal runaway, effectively suppressing the spread of heat after thermal runaway in battery cell 111. Therefore, the first cold plate 20 in this application not only cools the battery cell 111 but also prevents the spread of heat after thermal runaway in battery cell 111, thus improving the safety of battery 100.

[0053] It should be noted that when a single battery cell 111 experiences thermal runaway, if the substances generated by the runaway are not cooled, the heat propagation will cause the internal temperature and pressure of the battery 100 to rise, leading to a violent reaction or even an explosion, posing a safety hazard to the personal safety and property of users of electrical devices (such as vehicles or complete machines). The first cold plate 20 cools the substances generated by the thermal runaway in a timely manner when the single battery cell 111 experiences thermal runaway, preventing the heat propagation after the thermal runaway of the single battery cell 111, thereby improving the safety of the battery 100.

[0054] Generally, the first cold plate 20 is connected to an external power unit, which can provide a certain pressure to create a better spray effect for the coolant in the cooling channel 23, which is beneficial for quickly cooling the substances generated by thermal runaway and effectively suppressing the thermal propagation after thermal runaway of the battery cell 111. Optionally, the external power unit includes a pump, which provides a certain pressure to create a better spray effect for the coolant in the cooling channel 23 towards the explosion-proof valve 112, which is beneficial for quickly cooling the substances generated by thermal runaway.

[0055] In some embodiments, see further reference. Figure 3 The explosion-proof valve 112 is provided with a thinning portion 113. When the battery cell 111 experiences thermal runaway, the accumulated gas and heat inside can be ejected through the thinning portion 113, preventing the battery cell 111 from rupturing or exploding. Optionally, the explosion-proof valve 112 has a sheet-like structure, and the thinning portion 113 is annularly disposed on the explosion-proof valve 112. It is conceivable that in other embodiments, the shape of the explosion-proof valve 112 and the thinning portion 113 are not limited.

[0056] In some embodiments, the fire extinguishing unit 22 is configured to rupture and connect to the cooling channel 23 when the battery cell 111 experiences thermal runaway. That is, when the battery cell 111 experiences thermal runaway, the fire extinguishing unit 22 can rupture to open the cooling channel 23, allowing coolant to be sprayed through the cooling channel 23 towards the explosion-proof valve 112. Specifically, the fire extinguishing unit 22 can rupture under the action of gas ejected from the explosion-proof valve 112. Optionally, the fire extinguishing unit 22 can melt and rupture under the action of high-temperature gas ejected from the explosion-proof valve 112, or rupture under the impact of high-pressure gas ejected from the explosion-proof valve 112, or rupture under the combined action of high temperature and high pressure of the gas ejected from the explosion-proof valve 112.

[0057] It is conceivable that in other embodiments, the fire extinguishing unit 22 may also open the cooling channel 23 without rupturing it. For example, if the cooling channel 23 is provided with an opening, the fire extinguishing unit 22 can switch between a closed state with the opening closed and an open state with the opening open. The battery 100 is provided with a detection system and a control system. When the detection system detects thermal runaway in a battery cell 111, the control system controls the corresponding fire extinguishing unit 22 to switch from a closed state to an open state, thereby achieving the effect of opening the cooling channel 23.

[0058] In some embodiments, see further reference. Figure 6 The thickness of the fire-fighting section 22 is less than the thickness of the first plate 21 to form a recessed structure. By setting the thickness of the fire-fighting section 22 to be less than the thickness of the first plate 21, when the battery cell 111 experiences thermal runaway, the thinner fire-fighting section 22 is more likely to melt under the high temperature of the gas and / or be broken under the high pressure of the gas, thereby opening the cooling channel 23.

[0059] It is conceivable that in other embodiments, the thickness of the fire-fighting section 22 may be equal to or greater than the thickness of the first plate 21. In this configuration, by setting the material of the fire-fighting section 22 to be different from that of the first plate 21, the fire-fighting section 22 is made to be easily melted under high temperature or easily broken under high pressure, thereby opening the cooling channel 23.

[0060] Further reading Figure 6 The inner bottom surface of the fire-fighting section 22 is provided with a groove 24 to form a thinning zone of the fire-fighting section 22. In this way, when the battery cell 111 experiences thermal runaway, the ejected material can break through or melt the fire-fighting section 22 from the thinning zone, so that the coolant in the cooling channel 23 flows out and sprays towards the explosion-proof valve 112 to prevent the spread of heat.

[0061] Optionally, the cross-sectional shape of the groove 24 can be straight, cross-shaped, or wavy. Of course, in other embodiments, the cross-sectional shape of the groove 24 is not limited.

[0062] In some embodiments, the fire-fighting section 22 is recessed relative to the first plate 21, and the fire-fighting section 22 and the first plate 21 define a receiving groove 25. The receiving groove 25 is configured to store ejected material used to breach the fire-fighting section 22. The fire-fighting section 22 forms the bottom wall of the receiving groove 25, and the side walls of the receiving groove 25 are formed on the first plate 21. When the battery cell 111 experiences thermal runaway, the ejected material facilitates breaching the fire-fighting section 22, allowing coolant in the cooling channel 23 to flow out and spray towards the explosion-proof valve 112 to prevent heat spread.

[0063] In some embodiments, see further reference. Figure 2 and see Figure 8 and Figure 9 Each battery module 10 includes at least one row of battery cells 11, and each row of battery cells 11 includes multiple battery cells 111. The battery 100 also includes a second cold plate 30 disposed within the housing 50. The extension direction of the second cold plate 30 is the same as the extension direction of the battery cell row 11, and the second cold plate 30 is provided on both sides of each row of battery cells 11. Optionally, the battery cell rows 11 are arranged sequentially along the width direction of the battery module 10, and each row of battery cells 11 includes multiple battery cells 111 along the length direction of the battery module 10; the second cold plate 30 is provided on both sides of each row of battery cells 11 along the width direction of the battery module 10.

[0064] With the above configuration, since each row of battery cells 11 is provided with a second cold plate 30 on both sides, the battery cells 111 in each row of battery cells 11 can exchange heat with the second cold plates 30 located on both sides, and at least one end of the battery cell 111 in the Z direction exchanges heat with the first cold plate 20. Under the combined action of the first cold plate 20 and the second cold plate 30, the heat dissipation effect of the battery cells 111 is guaranteed.

[0065] In some embodiments, see further reference. Figure 2 At least two adjacent second cold plates 30 are connected to form a U-shaped structure, that is, at least two adjacent second cold plates 30 are integrated into one unit. This arrangement can reduce the number of cold plates used in the battery 100; on the other hand, the closed end of the U-shaped cold plate can also exchange heat with the battery cell 111 located at the end, so as to improve the heat dissipation effect of the battery cell 111 at the end.

[0066] In some specific embodiments, since the number of second cold plates 30 is one more than the number of battery cell rows 11 included in each battery module 10, when each battery module 10 includes an even number of battery cell rows 11, the number of second cold plates 30 is odd. In this case, except for one second cold plate 30 located in the middle position along the width direction of the battery module 10 which is not connected to other cold plates, the remaining second cold plates 30 are connected in pairs in a U-shape.

[0067] In another specific embodiment, each battery module 10 includes an odd number of rows of battery cells 11, and the number of second cold plates 30 is even, with adjacent second cold plates 30 connected in a U-shape.

[0068] In some embodiments, the battery cell 111 is cylindrical, and the second cold plate 30 is bent and extended to form an arcuate groove adapted to fit the outer peripheral surface of the battery cell 111. This arrangement allows each battery cell 111 to be accommodated in a corresponding arcuate groove, increasing the contact area between the second cold plate 30 and the battery cell 111, thereby improving the cooling effect on the cylindrical battery cell 111.

[0069] In other embodiments, the battery cell 111 can also be square, in which case the second cold plate 30 extends straight to facilitate contact with the surface of the square battery cell 111 and improve heat dissipation.

[0070] In some embodiments, see Figure 9 and Figure 10The battery 100 also includes a connector 40 at least partially disposed within the housing 50. The connector 40 has a main inlet 41, a main outlet 42, three branch inlets 43, and three branch outlets 44. All three branch inlets 43 are connected to the main inlet 41, and all three branch outlets 44 are connected to the main outlet 42. The three branch inlets 43 are respectively connected to a first inlet of a first cold plate 20, a second inlet of all upper-layer second cold plates 30 adjacent to the first cold plate 20, and a third inlet of all lower-layer second cold plates 30 adjacent to the first cold plate 20. The three branch outlets 44 are respectively connected to a first outlet of a first cold plate 20, a second outlet of all upper-layer second cold plates 30 adjacent to the first cold plate 20, and a third outlet of all lower-layer second cold plates 30 adjacent to the first cold plate 20.

[0071] In the above configuration, the external coolant flows from the main inlet 41 to three branch inlets 43. One branch inlet 43 flows to the first inlet of the first cold plate 20, and the other two branch inlets 43 flow to the second inlets of all upper-layer second cold plates 30 and the third inlets of all lower-layer second cold plates 30. After exchanging heat with the battery cells 111 in the first and second cold plates 20 and 30, the coolant flows through the first outlet of the first cold plate 20 to a branch outlet 44, through the second outlet of the upper-layer second cold plate 30 to another branch outlet 44, and through the third outlet of the lower-layer second cold plate 30 to another branch outlet 44, finally converging at the main outlet 42 and flowing out to the outside, in a continuous cycle. In this way, the first cold plate 20, all upper-layer second cold plates 30 adjacent to the first cold plate 20, and all lower-layer second cold plates 30 adjacent to the first cold plate 20 can all have their inlet and outlet connected to a single connector 40. This not only reduces the number of components in the battery 100 but also facilitates control over the inlet and outlet of the cold plates.

[0072] Optionally, please continue reading Figure 1 The battery 100 also includes a first connecting pipe 60, a second connecting pipe 70, an inlet pipe 80, and an outlet pipe 90 disposed within the housing 50. Along the length of the battery module 10, the first connecting pipe 60, the second connecting pipe 70, the inlet pipe 80, and the outlet pipe 90 are all located at the same end of the battery 100 as the connector 40. The second cold plate 30 of each layer of the battery module 10 is correspondingly provided with the first connecting pipe 60, the second connecting pipe 70, the inlet pipe 80, and the outlet pipe 90.

[0073] The following description uses the second cold plate 30 located above the first cold plate 20 as an example to illustrate the first connecting pipe 60, the second connecting pipe 70, the liquid inlet pipe 80, and the liquid outlet pipe 90. The arrangement of the first connecting pipe 60, the second connecting pipe 70, the liquid inlet pipe 80, and the liquid outlet pipe 90 corresponding to the second cold plate 30 located below the first cold plate 20 is the same as that of the first connecting pipe 60, the second connecting pipe 70, the liquid inlet pipe 80, and the liquid outlet pipe 90 corresponding to the second cold plate 30 located above the first cold plate 20.

[0074] The inlet pipe 80 and outlet pipe 90 extend along the arrangement direction of the battery cell array 11. The inlet pipe 80 has a first inlet and multiple first outlets, and the outlet pipe 80 has multiple second inlets and second outlets. The two ends of the first connecting pipe 60 are respectively connected to a branch inlet 43 and the first inlet of the inlet pipe 80. Each first outlet is connected to the second inlet of a second cold plate 30. The second outlet of each second cold plate 30 is connected to a second inlet. The two ends of the second connecting pipe 70 are respectively connected to the second outlet of the outlet pipe 90 and a branch outlet 44. It should be noted that when two second cold plates 30 are connected as a single structure, this single structure is considered as one second cold plate 30, having one inlet and one outlet.

[0075] In the above configuration, the coolant enters the connector 40 from the main inlet 41 and flows to three branch inlets 43. From one branch inlet 43, it flows to the first connecting pipe 60, then through the first inlet to the inlet pipe 80, and finally from the first outlet of the inlet pipe 80 to multiple second cold plates 30. After exchanging heat with the battery cells 111 in the second cold plates 30, the coolant flows from its outlet through the second inlet to the outlet pipe 90, and then through the second outlet of the outlet pipe 90 to the second connecting pipe 70, finally flowing out of the connector 40 to the outside. It is evident that the arrangement of the first connecting pipe 60, the inlet pipe 80, the outlet pipe 90, and the second connecting pipe 70 facilitates the distribution of coolant from the connector 40 to each of the second cold plates 30, and also facilitates the collection of coolant from each of the second cold plates 30 after heat exchange into the connector 40 for outflow.

[0076] In some embodiments, see Figure 11 Each second cold plate 30 has an inlet channel 31 and an outlet channel 32. In the Z direction, the inlet channel 31 and the outlet channel 32 are located at opposite ends of the second cold plate 30. The inlet of the second cold plate 30 is connected to the inlet channel 31, and the outlet is connected to the outlet channel 32. This facilitates the regular flow of coolant in the second cold plate 30 and improves the uniformity of heat exchange.

[0077] Another embodiment of this application provides an electrical device including the battery 100 described above. Since the battery 100 has beneficial effects, the electrical device including the battery 100 has the same beneficial effects, which will not be described in detail here.

[0078] Optionally, the electrical device is a vehicle, which can be a gasoline vehicle, a natural gas vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended vehicles, etc.

[0079] It is worth noting that, for pure electric vehicles, the aforementioned battery 100 can serve as a driving power source, thereby replacing fossil fuels to provide driving power.

[0080] In other embodiments, the type of electrical device is not limited. For example, the electrical device can also be a ship, spacecraft, electric toy, power tool, energy storage device, amusement equipment, elevator, and lifting equipment, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, or electric airplane toys, etc.; power 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, etc.; energy storage devices can be energy storage walls, base station energy storage, container energy storage, etc.; amusement equipment can be a carousel, a drop tower, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0081] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0082] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A battery, characterized in that, include: A battery module (10) is stacked in multiple layers along the Z direction. Each layer of the battery module (10) includes multiple battery cells (111). Each battery cell (111) has an explosion-proof valve (112) on one side along the Z direction. The Z direction is the height direction of the battery module (10). The first cold plate (20) is provided between each two adjacent battery modules (10), and the explosion-proof valves (112) are all arranged facing the first cold plate (20); The first cold plate (20) includes a first plate body (21) and a fire-fighting section (22). All the fire-fighting sections (22) and the first plate body (21) define a cooling channel (23). The fire-fighting section (22) corresponds one-to-one with the explosion-proof valve (112). The fire-fighting section (22) is configured to open the cooling channel (23) when the battery cell (111) experiences thermal runaway, so as to spray the coolant in the cooling channel (23) into the explosion-proof valve (112).

2. The battery according to claim 1, characterized in that, The fire protection unit (22) is configured to connect to the cooling channel (23) after the battery cell (111) ruptures due to thermal runaway.

3. The battery according to claim 2, characterized in that, The thickness of the fire protection section (22) is less than the thickness of the first plate (21) to form a recessed structure.

4. The battery according to any one of claims 1-3, characterized in that, The fire protection section (22) has a groove (24) on its inner bottom surface to form a thinning area of ​​the fire protection section (22); and / or The fire-fighting section (22) and the first plate (21) define a receiving groove (25), which is configured to store ejected material for breaking through the fire-fighting section (22).

5. The battery according to claim 1, characterized in that, The explosion-proof valve (112) is provided with a thinning part (113).

6. The battery according to claim 1, characterized in that, Each layer of the battery module (10) includes at least one row of battery cells (11), and each row of battery cells (11) includes a plurality of battery cells (111); The battery also includes a second cold plate (30), the extension direction of which is the same as the extension direction of the battery cell row (11), and the second cold plate (30) is provided on both sides of each row of battery cell rows (11).

7. The battery according to claim 6, characterized in that, At least two adjacent second cold plates (30) are connected to form a U-shaped structure; and / or The battery cell (111) is cylindrical, and the second cold plate (30) is bent and extended to form an arcuate groove for fitting the outer peripheral surface of the battery cell (111).

8. The battery according to claim 6, characterized in that, The battery also includes a connector (40), which has a main inlet (41), a main outlet (42), three branch inlets (43) and three branch outlets (44), the three branch inlets (43) being connected to the main inlet (41) and the three branch outlets (44) being connected to the main outlet (42). The three branch inlets (43) are respectively connected to the first inlet of the first cold plate (20), the second inlet of all the upper second cold plates (30) adjacent to the first cold plate (20), and the third inlet of all the lower second cold plates (30) adjacent to the first cold plate (20); The three branch outlets (44) are respectively connected to the first outlet of the first cold plate (20), the second outlet of all the upper second cold plates (30) adjacent to the first cold plate (20), and the third outlet of all the lower second cold plates (30) adjacent to the first cold plate (20).

9. The battery according to claim 6, characterized in that, Each of the second cold plates (30) has an inlet channel (31) and an outlet channel (32); In the Z direction, the inlet channel (31) and the outlet channel (32) are located at both ends of the second cold plate (30).

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

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