Battery device and electric device

Abstract

The utility model relates to a battery device and a power utilization device. The battery device comprises a box body, a battery monomer and a heat exchange mechanism, a pressure relief channel is formed in the box body and is communicated with the inside and the outside of the box body; the heat exchange mechanism is arranged in the box body and comprises a heat exchange main body, a cooling channel and an exhaust channel which are mutually independent are arranged in the heat exchange main body, the heat exchange main body comprises a liquid inlet and a liquid outlet which are communicated with the cooling channel, and the liquid inlet and the liquid outlet are located on the same side of the heat exchange main body; the battery monomers are mounted in the box body and are positioned above the heat exchange main body; the top and the bottom of the battery monomer are respectively provided with a pole and a pressure relief piece; a plurality of exhaust parts are arranged on the surface, facing the battery monomers, of the heat exchange main body; each exhaust part is opposite to the pressure relief piece of each battery monomer; each exhaust part is communicated between the pressure relief piece of each battery monomer and the exhaust channel when the pressure relief piece is opened, and one end, far away from the exhaust part, of the exhaust channel is connected with the pressure relief channel. And high-temperature and high-pressure gas generated in the battery device can be conveyed out of the box body.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery device and a power utilization device. BACKGROUND

[0002] A battery device is prone to generate a large amount of heat during use, and the heat will have a certain impact on the performance and service life of the battery device. Therefore, during the production and manufacturing process of the battery device, a heat exchange structure needs to be assembled to accelerate the heat dissipation efficiency of the battery device. However, the current heat exchange structure may accumulate high-temperature and high-pressure gas in the interior of the battery device during use, which cannot be smoothly discharged, thereby easily causing internal short circuit and other problems of the battery device. CONTENT OF THE INVENTION

[0003] In view of the above problems, the present application provides a battery device and a power utilization device, which can alleviate the problem that high-temperature and high-pressure gas accumulates in the battery monomer and cannot be smoothly discharged when the battery device is in thermal runaway.

[0004] In a first aspect, the present application provides a battery device, which comprises a box body, a battery monomer and a heat exchange mechanism. A pressure relief channel is formed in the box body, and the pressure relief channel communicates the inside and outside of the box body; the heat exchange mechanism is arranged in the box body; the heat exchange mechanism comprises a heat exchange main body, and the heat exchange main body is internally provided with a cooling channel and an exhaust channel which are independent of each other; the battery monomer is installed in the box body and located above the heat exchange main body; a pole and a pressure relief part are respectively arranged at the top and the bottom of the battery monomer; wherein the cooling channel is used for the cooling liquid to enter for heat exchange; the surface of the heat exchange main body facing the battery monomer is provided with a plurality of exhaust parts, and each exhaust part is arranged opposite to the pressure relief part of each battery monomer; each exhaust part is connected between the pressure relief part of each battery monomer and the exhaust channel when the pressure relief part is opened, and one end of the exhaust channel away from the exhaust part is connected with the pressure relief channel.

[0005] In the technical scheme of the present application, the pole and the pressure relief part are respectively arranged at the top and the bottom of the battery monomer to directly separate the pole and the pressure relief part, thereby reducing the probability of high-temperature and high-pressure gas sprayed from the pressure relief part flowing to the pole and other components. Because the pressure relief part, the exhaust channel and the pressure relief channel are connected, the high-temperature and high-pressure gas in the battery monomer can be concentrated and transported to the outside of the box body by the pressure relief channel after entering the exhaust channel, thereby reducing the probability of the high-temperature and high-pressure gas accumulating in the battery monomer and diffusing to the pole and other components, which leads to the damage of the pole and the easy occurrence of short circuit. In addition, the cooling channel can supply the cooling liquid to flow for heat exchange, thereby further reducing the temperature of the battery monomer and improving the environment of the battery monomer when thermal runaway occurs.

[0006] In some embodiments, at least one side of the heat exchange main body is provided with a gas collecting port, one end of the gas collecting port is connected with the exhaust channel, and the other end of the gas collecting port is connected with the pressure relief channel.

[0007] Therefore, the gas in the exhaust passage can be concentrated and treated by setting the gas collection port, and the exhaust speed of the gas in the exhaust passage can be increased by setting multiple gas collection ports.

[0008] In some embodiments, the heat exchange body comprises an inlet and an outlet, which are located on the same side of the heat exchange body.

[0009] Since the inlet and the outlet are located on the same side of the heat exchange body, the flow path of the cooling liquid is extended, and the temperature of the cooling liquid at the inlet and the outlet is as same as possible, thereby improving the cooling effect.

[0010] In some embodiments, the battery cells comprise a plurality of battery cells arranged in a row along a first direction and arranged in a column along a second direction, and the first direction and the second direction intersect; the cooling channels comprise a plurality of cooling channels, each cooling channel extends along the first direction, and all the cooling channels are arranged along the second direction.

[0011] The heat exchange mechanism comprises a first flow collector, the inlet and the outlet are located on one side of the heat exchange body along the first direction, and the first flow collector is arranged on the other side of the heat exchange body along the first direction.

[0012] Part of the cooling channels are connected between the inlet and the first flow collector, and the other part of the cooling channels are connected between the first flow collector and the outlet.

[0013] In this way, the flow path of the cooling liquid is extended, which can exchange heat with more battery cells and improve the cooling range. Multiple cooling channels are arranged to reduce the probability that the cooling liquid flow is not smooth due to dirt in part of the cooling channels, which affects the cooling effect. The second ends of the multiple cooling channels arranged side by side are connected through the first flow collector, so that the temperature of the cooling liquid at the inlet and the outlet is as same as possible to improve the cooling effect.

[0014] In some embodiments, the heat exchange mechanism further comprises an inlet member, an outlet member, a second flow collector and a third flow collector, the second flow collector is arranged on the heat exchange body and connected between the inlet member and the inlet, and the third flow collector is arranged on the heat exchange body and connected between the outlet member and the outlet.

[0015] In this way, the way of the cooling liquid entering and flowing out of each cooling channel is simplified, and the cooling liquid can be concentrated and discharged.

[0016] In some embodiments, the heat exchange mechanism further comprises a top plate, an intermediate plate and a bottom plate, the cooling channel is formed between the top plate and the intermediate plate, the exhaust channel is formed between the intermediate plate and the bottom plate, the intermediate plate is provided with first sub-exhaust parts, the top plate is provided with second sub-exhaust parts, the first sub-exhaust parts and the second sub-exhaust parts correspond to each other and jointly form the exhaust part.

[0017] In this way, because the exhaust channel is arranged between the intermediate plate and the bottom plate, and the cooling channel is arranged between the intermediate plate and the top plate, the volume of the exhaust channel can be maximized as much as possible. In addition, the pressure relief parts of each battery monomer are in communication with the exhaust channel, so that the gas can flow between the battery monomers, thereby maximizing the gas flow space inside the battery device and improving the space utilization of the internal space of the battery device.

[0018] In some embodiments, the intermediate plate is recessed to form a recessed part, the recessed part and the top plate jointly form the cooling channel, along the extension direction of the cooling channel, the recessed part has alternately arranged first arc-shaped segments and second arc-shaped segments, the first arc-shaped segments are located between two adjacent first sub-exhaust parts on the intermediate plate, and the second arc-shaped segments are arranged around the periphery of a single first sub-exhaust part.

[0019] In this way, the length of the recessed part can be increased as much as possible, thereby prolonging the length of the cooling liquid flowing through the cooling channel. Because the second arc-shaped segments are arranged around the periphery of the first sub-exhaust part, the degree of contact between the cooling liquid and the high-temperature and high-pressure gas flowing out of the exhaust part can be increased, thereby improving the heat exchange efficiency.

[0020] In some embodiments, the intermediate plate is provided with a first through hole, the first through hole is configured as a first sub-exhaust part; the top plate is provided with a second through hole, the second through hole is configured as a second sub-exhaust part.

[0021] In this way, the structure of the first sub-exhaust part and the second sub-exhaust part is simplified, and the preparation process of the first sub-exhaust part and the second sub-exhaust part is reduced.

[0022] In some embodiments, the intermediate plate is provided with a first thinning part, the first thinning part is configured as a first sub-exhaust part; the top plate is provided with a second thinning part, the second thinning part is configured as a second sub-exhaust part, and the first thinning part and the second thinning part can be broken by the gas when the pressure relief part is opened.

[0023] In this way, it is not necessary to arrange a through hole on the intermediate plate and the top plate for the high-temperature and high-pressure gas to flow, but a thinning part is arranged on the intermediate plate and the top plate, thereby enriching the diversity of the structure of the intermediate plate and the top plate.

[0024] In some embodiments, the first thinning part and the second thinning part are both provided with a notch.

[0025] In this way, the setting of the score lines in the first and second thinning portions can reduce the difficulty of the high-temperature and high-pressure gas breaking through the thinning portions, facilitate the timely discharge of the high-temperature and high-pressure gas into the exhaust channel, and reduce the probability of the high-temperature and high-pressure gas accumulating in the battery monomer, thereby affecting the environment inside the battery monomer and causing thermal runaway inside the battery monomer.

[0026] In some embodiments, the heat exchange mechanism further comprises a heat-resistant layer arranged at the bottom of the heat exchange mechanism, and the heat-resistant layer covers the bottom wall of the heat exchange mechanism.

[0027] In this way, the high-temperature resistance and impact resistance of the bottom plate can be improved, and the probability of the bottom plate melting and softening at high temperatures, thereby causing high-temperature gas to enter other areas of the battery device and affecting the corresponding components, thereby affecting the use safety of the battery device, can be reduced.

[0028] In a second aspect, the application provides a power utilization device comprising the battery device in the above embodiments.

[0029] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in the various drawings indicate the same or similar elements. In the drawings:

[0031] Figure 1 is a schematic view of a vehicle according to one or more embodiments.

[0032] Figure 2 is an exploded view of a battery device according to one or more embodiments.

[0033] Figure 3 is an exploded view of a battery device according to one or more embodiments.

[0034] Figure 4 is a cross-sectional view of a heat exchange mechanism connected to a battery monomer according to one or more embodiments.

[0035] Figure 5 is an exploded view of a heat exchange mechanism according to one or more embodiments.

[0036] Figure 6A plan view of the intermediate plate of the heat exchange mechanism according to one or more embodiments.

[0037] Figure 7 A plan view of the intermediate plate of the heat exchange mechanism according to one or more embodiments. Figure 6 An enlarged view of the middle A.

[0038] Figure 8 An exploded view of the heat exchange mechanism according to one or more embodiments provided with a first thinning portion and a second thinning portion.

[0039] Figure 9 An exploded view of the heat exchange mechanism according to one or more embodiments provided with a first thinning portion equipped with a notch and a second thinning portion equipped with a notch.

[0040] Figure 10 A plan view of the intermediate plate of the heat exchange mechanism according to one or more embodiments equipped with a notch.

[0041] Figure 11 An enlarged view of the middle B. Figure 10

[0042] Reference signs in the detailed description are as follows:

[0043] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, box body; 11, first part; 12, second part; 20, battery monomer; 21, end cover; 21a, pole column; 22, shell; 23, electrode assembly; 24, pressure relief piece; 30, heat exchange mechanism; 30a, heat exchange main body; 31, cooling channel; 32, exhaust channel; 33, exhaust portion; 34, first confluence piece; 35, second confluence piece; 36, third confluence piece; 37, top plate; 371, second sub-exhaust portion; 38, intermediate plate; 381, first sub-exhaust portion; 382, recessed portion; 3811, first arc-shaped segment; 3812, second arc-shaped segment; 39, bottom plate; a, first end; b, second end; c, liquid inlet; d, liquid outlet; X, first direction; Y, second direction. DETAILED DESCRIPTION

[0044] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0045] ​Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise noted, the terms "including" and "comprising" are open-ended and do not exclude the presence of unrecited elements or limitations.

[0046] In the description of the embodiments of the present application, if the technical terms "first", "second", etc. are used, they are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly and specifically limited.

[0047] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with each other.

[0048] In the description of the embodiments of the present application, if the term "and / or" appears, it only describes the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, if it appears, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0049] In the description of the embodiments of the present application, if the term "multiple" appears, it means two or more (including two), and similarly, "multiple groups" means two or more groups (including two groups), and "multiple pieces" means two or more pieces (including two pieces).

[0050] In the description of the embodiments of the present application, if the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application. It is not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0051] In the description of the embodiments of the present application, unless specifically defined and limited, if there are, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0052] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0053] The heat exchange mechanism is an important part of the battery device, and can create a suitable temperature environment for the battery monomer of the battery device, so that the battery monomer runs. However, when the battery monomer is in thermal runaway, the high-temperature and high-pressure gas spouted from the pressure relief member is easy to accumulate in the battery monomer, and spread to the pole and other areas, so as to cause the damage of the pole and other components and the short circuit, and aggravate the thermal runaway.

[0054] In order to solve the problem that the high-temperature and high-pressure gas is accumulated in the battery monomer and is not easy to be discharged, and the thermal runaway is aggravated, some embodiments of the present application provide a battery device. The battery device comprises a box body, a heat exchange mechanism and a battery monomer, the heat exchange mechanism is located in the box body, and comprises a heat exchange main body with independent cooling channels and exhaust channels. The battery monomer is located above the heat exchange main body, the top and bottom of the battery monomer are respectively provided with a pole and a pressure relief member, and each pressure relief member is arranged opposite to each exhaust part of the surface of the heat exchange main body facing the battery monomer. When the pressure relief member is opened, each exhaust part is communicated with the pressure relief member and the exhaust channel, because the exhaust channel is also communicated with the pressure relief channel, so the high-temperature and high-pressure gas in the battery device can be discharged to the outside of the box body. Because the pole and the pressure relief member are arranged at intervals, the probability of accumulation of high-temperature and high-pressure gas in the battery device is reduced. Therefore, the probability of short circuit caused by the accumulation of high-temperature and high-pressure gas in the battery monomer and the spread to the pole and other components is reduced. In addition, the cooling channel can supply cooling liquid to exchange heat with the battery monomer, reduce the temperature generated when the battery monomer runs, and improve the thermal runaway environment in the battery device.

[0055] The battery monomer disclosed in the embodiments of the present application can be used in electric devices such as vehicles, ships or aircraft, etc. The power supply system of the electric device can be composed of the battery monomer and the battery disclosed in the present application.

[0056] The embodiments of the present application provide a power consumption device using a battery device as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, an energy storage product, and the like. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, and the like. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, and the like. The energy storage product can include an energy storage station, and the like.

[0057] The following embodiments are described by taking a power consumption device of an embodiment of the present application as a vehicle 1000 for convenience of description.

[0058] Please refer to Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile. The new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like. The vehicle 1000 is internally provided with a battery device 100. The battery device 100 can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000. For example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0059] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0060] Please refer to Figure 2 , Figure 2An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a box 10 and battery cells 20, which are accommodated in the box 10. The box 10 is used to provide an accommodation space for the battery cells 20, and the box 10 can adopt various structures. In some embodiments, the box 10 can include a first part 11 and a second part 12, the first part 11 and the second part 12 are mutually covered, and the first part 11 and the second part 12 jointly define an accommodation space for accommodating the battery cells 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate structure, which is covered on the open side of the second part 12 to jointly define the accommodation space with the second part 12; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 is covered on the open side of the second part 12. Of course, the box 10 formed by the first part 11 and the second part 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0061] In the battery device 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection, where the mixed connection means that there are both series connection and parallel connection among the multiple battery cells 20. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole of the multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be that the multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form a battery module, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, which is accommodated in the box 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0062] Each battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0063] Please refer to Figure 3 , Figure 3 An exploded structural view of the battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes a battery. As Figure 3 , the battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23, and other functional components.

[0064] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Desirably, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is less likely to deform when subjected to a pressing impact, allowing the battery cell 20 to have higher structural strength and improved safety performance. The end cover 21 can be provided with functional components such as a pole 21a. The pole 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electric energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0065] The shell 22 is a component for fitting the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 22, the end cover 21 is covered on the shell 22. The shell 22 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application.

[0066] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained within the case 22. The electrode assembly 23 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs connect to the terminal to form a current loop.

[0067] Referring to Figure 2 , Figure 4 and Figure 5 , some embodiments of the present application provide a battery device 100, which includes a case 10, a battery cell 20, and a heat exchange mechanism 30. The case 10 has a pressure relief passage (not shown in the figures) formed therein, which communicates the inside and outside of the case 10. The heat exchange mechanism 30 is disposed in the case 10; the heat exchange mechanism 30 includes a heat exchange body 30a, which has a cooling passage 31 and an exhaust passage 32 formed therein independently of each other. The battery cell 20 is installed in the case 10 and above the heat exchange body 30a, and the top and bottom of the battery cell 20 are provided with a terminal 21a and a pressure relief member 24, respectively.

[0068] The cooling passage 31 is for a cooling liquid to enter and exchange heat, and the heat exchange body 30a has a plurality of exhaust portions 33 formed on the surface facing the battery cell 20. Each exhaust portion 33 is disposed opposite to the pressure relief member 24 of each battery cell 20, and is in communication between the pressure relief member 24 of each battery cell 20 and the exhaust passage 32 when the pressure relief member 24 is opened. The exhaust passage 32 has an end distal to the exhaust portions 33 connected to the pressure relief passage.

[0069] The heat exchange mechanism 30 is used to maintain the temperature of the battery cell 20 during operation, so as to prolong the service life of the battery cell 20. The pressure relief passage is for high-temperature and high-pressure gas in the battery cell 20 to pass through and be discharged out of the case 10.

[0070] When the battery device 100 is in operation, if thermal runaway occurs in the battery cell 20, the pressure relief member 24 of the battery cell 20 is opened, and high-temperature and high-pressure gas enters the exhaust passage 32 through the pressure relief member 24 and the exhaust portions 33, and then enters the pressure relief passage and is discharged out of the case 10 through the pressure relief passage.

[0071] Because the terminal post 21a and the pressure relief component 24 are located at the top and bottom of the battery cell 20, respectively, the pressure relief component 24 can be positioned to avoid the terminal post 21a, thereby reducing the probability that the high-temperature and high-pressure gas ejected from the pressure relief component 24 will directly flow to the terminal post 21a and other components, causing damage to the terminal post 21a. Since the pressure relief component 24 of a single battery cell 20 is positioned opposite to and connected to the exhaust section 33 of the heat exchange body 30a, the high-temperature and high-pressure gas inside the battery cell 20 can flow directly to the exhaust section 33, and then be discharged into the housing 10 through the exhaust channel 32 and the pressure relief channel.

[0072] This reduces the probability of high-temperature, high-pressure gas accumulating inside the housing 10 and diffusing to components such as the terminal 21a, which could damage the terminal 21a and cause a short circuit. In addition, the cooling channel 31 in the heat exchange mechanism 30 can also supply coolant flow for heat exchange, thus further reducing the temperature of the battery cell 20 and improving the thermal runaway environment inside the battery device 100.

[0073] It is understandable that when there are multiple battery cells 20, there is a one-to-one correspondence between the battery cells 20 and the exhaust section 33 of the heat exchange body 30a, that is, the high-temperature and high-pressure gas ejected from the pressure relief component 24 of each battery cell 20 enters the corresponding exhaust section 33.

[0074] In summary, by setting the terminal post 21a and the pressure relief component 24 at the top and bottom of the battery cell 20 respectively, directly separating the terminal post 21a and the pressure relief component 24, the probability of high-temperature and high-pressure gas ejected from the pressure relief component 24 flowing to components such as the terminal post 21a is reduced. Because the pressure relief component 24, the exhaust channel 32, and the pressure relief channel are connected, the high-temperature and high-pressure gas inside the battery cell 20 can be concentrated and transported to the outside of the housing 10 by the pressure relief channel after entering the exhaust channel 32. This reduces the probability of high-temperature and high-pressure gas accumulating inside the battery cell 20 and diffusing to components such as the terminal post 21a, which could damage the terminal post 21a and cause a short circuit. In addition, the cooling channel 31 allows coolant to flow for heat exchange, thus further reducing the temperature of the battery cell 20 and improving the environment in which the battery cell 20 is located when thermal runaway occurs.

[0075] like Figure 5 As shown, in some embodiments, at least one side of the heat exchange body 30a is provided with an air collection port, one end of which is connected to the exhaust channel 32 and the other end is connected to the pressure relief channel.

[0076] This can be understood as the heat exchange body 30a having a gas collecting port on one side or on both sides. For example, the heat exchange body 30a has a gas collecting port on each of its opposite sides, with the gas collecting port on the same side as the pressure relief channel. The high-temperature, high-pressure gas ejected from the pressure relief components 24 of all the battery cells 20 flows into the exhaust channel 32 and is then split within the exhaust channel 32, flowing from the two gas collecting ports to the pressure relief channel.

[0077] In this way, the gases in the exhaust passage 32 can be concentrated and discharged through the gas collection port. The number of gas collection ports can be increased to accelerate the discharge of the gases in the exhaust passage 32.

[0078] Please refer to Figure 5 In some embodiments, the heat exchange body 30a includes an inlet and an outlet that are in communication with the cooling passage 31. The inlet and the outlet are located on the same side of the heat exchange body 30a.

[0079] Because the inlet and the outlet are located on the same side of the heat exchange body 30a, the flow path of the cooling liquid is extended, and the temperature of the cooling liquid at the inlet and the outlet is as uniform as possible, thereby improving the cooling effect.

[0080] Please refer to Figure 5 In some embodiments, the battery cells 20 include a plurality of battery cells 20 arranged in a row along a first direction X and in a column along a second direction Y. The first direction X and the second direction Y intersect. The cooling passage 31 includes a plurality of cooling passages 31. Each cooling passage 31 extends along the first direction X, and all the cooling passages 31 are arranged along the second direction Y. The heat exchange mechanism 30 includes a first flow collector 34. The inlet and the outlet are located on one side of the heat exchange body 30a along the first direction X. The first flow collector 34 is located on the other side of the heat exchange body 30a along the first direction X. Some of the cooling passages 31 are in communication between the inlet and the first flow collector 34. The other cooling passages 31 are in communication between the first flow collector 34 and the outlet.

[0081] For example, the heat exchange body 30a includes a first end a and a second end b located opposite to each other along the first direction X. The number of the cooling passages 31 is eight. All the cooling passages 31 extend along the first direction X and are arranged along the second direction Y. All the cooling passages 31 are evenly divided into two parts along the first direction X. Some of the cooling passages 31 are in communication with the inlet of the first end a and the first flow collector 34 of the second end b. The other cooling passages 31 are in communication with the outlet of the first end a and the first flow collector 34 of the second end b.

[0082] The flow path of the cooling liquid in the heat exchange body 30a is as follows. The cooling liquid enters each cooling passage 31 from the inlet of the first end a and flows to the second end b. The cooling liquid is collected at the first flow collector 34 of the second end b, and then is divided and flows to the first end a. The cooling liquid flows to the outlet in communication with each cooling passage 31.

[0083] In this way, the flow path of the cooling liquid is lengthened, so that the cooling liquid can exchange heat with more battery monomers 20, and the cooling range is improved. The plurality of cooling channels 31 are arranged to reduce the probability that the cooling liquid flow is not smooth due to dirt in some of the cooling channels 31, thereby affecting the cooling effect. The second ends b of the plurality of cooling channels 31 arranged side by side are connected by the first flow collector 34, and then divided, so that the temperatures of the cooling liquid at the liquid inlet and the liquid outlet are as close as possible, thereby improving the cooling effect.

[0084] As shown in Figure 5 some embodiments, the heat exchange mechanism 30 further comprises a liquid inlet member c, a liquid outlet member d, a second flow collector 35, and a third flow collector 36. The second flow collector 35 is arranged on the heat exchange body 30a and is in communication between the liquid inlet member c and the liquid inlet. The third flow collector 36 is arranged on the heat exchange body 30a and is in communication between the liquid outlet member d and the liquid outlet.

[0085] In other words, the second flow collector 35 is arranged at the liquid inlet of each cooling channel 31 and is in communication with the liquid inlet member c. By injecting the cooling liquid into the liquid inlet member c, the cooling liquid first flows into the second flow collector 35, and then flows into the liquid inlets of the cooling channels 31 and enters the corresponding cooling channels 31. Similarly, the cooling liquid flowing out of the liquid outlets of the cooling channels 31 is collected in the third flow collector 36 and then flows into the liquid outlet through the third flow collector 36 and flows out of the liquid outlet.

[0086] In this way, the way in which the cooling liquid enters and exits the cooling channels 31 is simplified, and the cooling liquid can be concentrated and discharged.

[0087] As shown in Figure 5 some embodiments, the heat exchange mechanism 30 further comprises a top plate 37, an intermediate plate 38, and a bottom plate 39. The cooling channels 31 are formed between the top plate 37 and the intermediate plate 38, and the exhaust channels 32 are formed between the intermediate plate 38 and the bottom plate 39. The intermediate plate 38 is provided with first sub-exhaust portions 381, and the top plate 37 is provided with second sub-exhaust portions 371. The first sub-exhaust portions 381 and the second sub-exhaust portions 371 correspond one by one and jointly form the exhaust portion 33.

[0088] The adjacent two of the top plate 37, the intermediate plate 38, and the bottom plate 39 are connected together by brazing, which reduces the probability of deformation of each plate body during welding, protects each plate body as much as possible, and simplifies the processing technology by brazing, thereby improving the production efficiency. It should be noted that the first sub-exhaust portions 381 and the second sub-exhaust portions 371 are not in communication with the cooling channels 31, which reduces the probability that the cooling channels 31 and the exhaust channels 32 are in communication, thereby causing the cooling liquid to leak or the high-temperature and high-pressure gas to be unable to be smoothly discharged from the box body 10.

[0089] Because the exhaust passage 32 is arranged between the intermediate plate 38 and the bottom plate 39, and the cooling passage 31 is arranged between the intermediate plate 38 and the top plate 37, the volume of the exhaust passage 32 can be maximized as much as possible. In addition, because each battery monomer 20 is in communication with the exhaust passage 32, the gases among the battery monomers 20 can be communicated, thereby maximizing the gas flow space inside the battery device 100 and improving the space utilization of the space inside the battery device 100.

[0090] Please refer to Figures 5 to 7 In some embodiments, the intermediate plate 38 is recessed to form a recessed portion 382, and the recessed portion 382 and the top plate 37 jointly form the cooling passage 31. Along the extension direction of the cooling passage 31, the recessed portion 382 has first arc-shaped segments 3811 and second arc-shaped segments 3812 arranged alternately. The first arc-shaped segment 3811 is located between two adjacent first sub-exhaust portions 381 on the intermediate plate 38, and the second arc-shaped segment 3812 is arranged around the periphery of a single first sub-exhaust portion 381.

[0091] Exemplarily, in Figure 7 In the example shown, the number of first sub-exhaust portions 381 is two, and the first sub-exhaust portions 381 are spaced apart along the first direction X. The extension direction of the cooling passage 31 is parallel to the first direction X, and the shape of the recessed portion 382 can be wavy. The recessed portion 382 includes one first arc-shaped segment 3811 and two second arc-shaped segments 3812, and the two ends of the first arc-shaped segment 3811 are connected to one second arc-shaped segment 3812 respectively. The first arc-shaped segment 3811 is located between two adjacent first sub-exhaust portions 381, one exhaust portion 33 is arranged corresponding to one second arc-shaped segment 3812, and is located in the recessed portion of the second arc-shaped segment 3812.

[0092] In this way, the length of the recessed portion 382 can be increased as much as possible, thereby prolonging the length of the cooling liquid flowing through the cooling passage 31. Because the second arc-shaped segment 3812 is arranged around the periphery of the first sub-exhaust portion 381, the degree of contact between the cooling liquid and the high-temperature and high-pressure gas flowing out of the exhaust portion 33 can be increased, thereby improving the heat exchange efficiency.

[0093] As Figure 5 shown, in some embodiments, the intermediate plate 38 is provided with a first through hole configured as a first sub-exhaust portion 381, and the top plate 37 is provided with a second through hole configured as a second sub-exhaust portion 371.

[0094] When the pressure relief member 24 is opened, the high-temperature and high-pressure gas in each battery monomer 20 flows through the corresponding first through hole and second through hole in sequence via the corresponding pressure relief member 24, thereby entering the exhaust passage 32.

[0095] In this way, the structure of the first sub-exhaust part 381 and the second sub-exhaust part 371 is simplified, and the manufacturing process of the first sub-exhaust part 381 and the second sub-exhaust part 371 is reduced.

[0096] As shown in Figure 8 some embodiments, the intermediate plate 38 is provided with a first thinned part configured as the first sub-exhaust part 381, and the top plate 37 is provided with a second thinned part configured as the second sub-exhaust part 371, which can be broken by the gas when the pressure relief member 24 is opened.

[0097] It can be understood that the intermediate plate 38 includes a first body and a first thinned part, the thickness of the first thinned part is less than that of the first body and is provided with the first sub-exhaust part 381. When the pressure relief member 24 is opened, the high-temperature and high-pressure gas can break through the first thinned part to flow through the intermediate plate 38. Similarly, the top plate 37 also includes a second body and a second thinned part, the thickness of the second thinned part is less than that of the second body and is provided with the second sub-exhaust part 371. When the pressure relief member 24 is opened, the high-temperature and high-pressure gas can break through the second thinned part to flow through the top plate 37.

[0098] In this way, it is not necessary to provide a through hole on the intermediate plate 38 and the top plate 37 for the high-temperature and high-pressure gas to flow, but a thinned part is directly provided on the intermediate plate 38 and the top plate 37, thereby enriching the diversity of the structure of the intermediate plate 38 and the top plate 37.

[0099] More specifically, as shown in Figure 9 some embodiments, the first thinned part and the second thinned part are both provided with a notch.

[0100] When the pressure relief member 24 is opened, the high-temperature and high-pressure gas can impact the part where the notch is located and break through the first thinned part and the second thinned part to flow into the exhaust passage 32. The provision of the notch on the first thinned part and the second thinned part can reduce the difficulty of the high-temperature and high-pressure gas breaking through the thinned part, facilitate the timely discharge of the high-temperature and high-pressure gas into the exhaust passage 32, and reduce the probability of the high-temperature and high-pressure gas accumulating in the battery monomer 20, thereby affecting the environment inside the battery monomer 20 and causing thermal runaway inside the battery monomer 20.

[0101] As shown in Figure 10 and Figure 11 when the first thinned part and the second thinned part are both provided with a notch, along the first direction X, the recessed part 382 has alternately arranged first arc-shaped segments 3811 and second arc-shaped segments 3812, the first arc-shaped segments 3811 are located between two adjacent notches (first sub-exhaust parts 381) on the intermediate plate 38, and the second arc-shaped segments 3812 are arranged around the periphery of a single notch.

[0102] In some embodiments, the heat exchange mechanism 30 further includes a heat-resistant layer disposed at the bottom of the heat exchange mechanism 30, the heat-resistant layer covering the bottom wall of the heat exchange mechanism 30.

[0103] The heat-resistant layer can be applied to the bottom wall of the heat exchange mechanism 30, i.e., the bottom wall of the base plate 39, by spraying. This design can improve the high-temperature resistance and impact resistance of the base plate 39, and reduce the probability that the base plate 39 will melt and soften at high temperatures, thereby allowing high-temperature gases to enter other areas of the battery device 100, affecting the corresponding components, and thus affecting the safety of the battery device 100.

[0104] Furthermore, some embodiments of this application also provide an electrical device that includes the battery device 100 described in the above embodiments. Based on the same inventive concept, the electrical device has all the beneficial effects of the battery device 100, which will not be repeated here.

[0105] In a specific embodiment, such as Figure 5 As shown, the battery device 100 includes a housing 10, battery cells 20, and a heat exchange mechanism 30. A pressure relief channel is formed inside the housing 10, connecting the inside and outside of the housing 10. The battery cells 20 are installed inside the housing 10 and located above the heat exchange body 30a. A terminal post 21a and a pressure relief component 24 are respectively provided at the top and bottom of the battery cells 20. The heat exchange mechanism 30 is disposed inside the housing 10; the heat exchange mechanism 30 includes the heat exchange body 30a, and further includes a top plate 37, a middle plate 38, and a bottom plate 39. A cooling channel 31 is formed between the top plate 37 and the middle plate 38, allowing coolant to enter for heat exchange. An exhaust channel 32 is formed between the middle plate 38 and the bottom plate 39, and the exhaust channel 32 and the cooling channel 31 are independent of each other. The intermediate plate 38 is provided with a first sub-exhaust section 381 configured as a first through hole, and the top plate 37 is provided with a second sub-exhaust section 371 configured as a second through hole. The first sub-exhaust section 381 and the second sub-exhaust section 371 correspond one to one and are connected to the exhaust channel 32.

[0106] When the battery device 100 is running, if the battery cell 20 experiences thermal runaway, the pressure relief component 24 of the battery cell 20 will open. The high-temperature and high-pressure gas will pass through the pressure relief component 24, the first sub-exhaust section 381 and the second sub-exhaust section 371 in sequence and enter the exhaust channel 32. Then it will enter the pressure relief channel and be discharged to the outside of the housing 10 through the pressure relief channel.

[0107] Because the pole 21a and the pressure relief member 24 are respectively located at the top and bottom of the battery monomer 20, the pressure relief member 24 can be arranged away from the pole 21a, thereby reducing the probability that the high-temperature and high-pressure gas spouted from the pressure relief member 24 directly flows to the pole 21a and other components, causing the pole 21a to be damaged. Because the pressure relief member 24 of the single battery monomer 20 is arranged opposite to and communicated with the first sub-exhaust part 381 and the second sub-exhaust part 371 of the heat exchange mechanism 30, the high-temperature and high-pressure gas in the battery monomer 20 can directly flow to the first sub-exhaust part 381 and the second sub-exhaust part 371, and then be discharged out of the box 10 through the exhaust channel 32 and the pressure relief channel.

[0108] In this way, the probability that the high-temperature and high-pressure gas accumulates in the box 10 and diffuses to the pole 21a and other components, causing the pole 21a to be damaged and leading to short circuit is reduced. In addition, the cooling channel 31 in the heat exchange mechanism 30 can also flow the cooling liquid to perform heat exchange, so that the temperature of the battery monomer 20 can be further reduced, and the thermal runaway environment inside the battery device 100 is improved.

[0109] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, however, as long as the combination of the technical features does not cause contradiction, it should be considered as within the scope of the present disclosure.

[0110] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that, for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A battery device, characterized by, The application relates to a battery pack, which comprises a box, a heat exchange mechanism and a plurality of battery cells. The box is internally formed with a pressure relief channel, which is in communication with the inside and outside of the box. The heat exchange mechanism is arranged in the box and comprises a heat exchange main body, which is internally provided with a cooling channel and an exhaust channel. The heat exchange main body comprises a liquid inlet and a liquid outlet, which are arranged on the same side of the heat exchange main body and are in communication with the cooling channel. The battery cells are arranged above the heat exchange main body in the box, and the top and bottom of each battery cell are respectively provided with a pole and a pressure relief component. The cooling channel is used for the cooling liquid to enter and exchange heat.

2. The battery device according to claim 1, characterized by The surface of the heat exchange main body, which faces the battery cells, is provided with a plurality of exhaust portions, and each exhaust portion is arranged opposite to the pressure relief component of each battery cell.

3. The battery device of claim 1, wherein When the pressure relief component is opened, each exhaust portion is in communication with the pressure relief component of each battery cell and the exhaust channel. The exhaust channel is connected to the pressure relief channel at one end away from the exhaust portion. The battery cells are arranged in a plurality of rows along a first direction and a plurality of columns along a second direction, and the first direction and the second direction intersect.

4. The battery device of claim 1, wherein The cooling channel comprises a plurality of cooling channels, each of which extends along the first direction, and all the cooling channels are arranged along the second direction.

5. The battery device of claim 1, wherein The heat exchange mechanism comprises a first flow collecting component.

6. The battery device of claim 5, wherein One part of the cooling channel is in communication between the liquid inlet and the first flow collecting component, and the other part of the cooling channel is in communication between the first flow collecting component and the liquid outlet. The heat exchange mechanism further comprises a liquid inlet component, a liquid outlet component, a second flow collecting component and a third flow collecting component. The second flow collecting component is arranged on the heat exchange main body and is in communication between the liquid inlet component and the liquid inlet. The third flow collecting component is arranged on the heat exchange main body and is in communication between the liquid outlet component and the liquid outlet. The heat exchange mechanism further comprises a top plate, an intermediate plate and a bottom plate. The cooling channel is formed between the top plate and the intermediate plate, and the exhaust channel is formed between the intermediate plate and the bottom plate. The intermediate plate is provided with a first exhaust sub-portion, and the top plate is provided with a second exhaust sub-portion. The first exhaust sub-portion and the second exhaust sub-portion correspond to each other and jointly form the exhaust portion. The intermediate plate is recessed to form a recessed portion. The recessed portion and the top plate jointly form the cooling channel. In the extension direction of the cooling channel, the recessed portion is provided with a first arc-shaped segment and a second arc-shaped segment which are alternately arranged. The first arc-shaped segment is arranged between two adjacent first exhaust sub-portions on the intermediate plate, and the second arc-shaped segment is arranged around the periphery of a single first exhaust sub-portion.

7. The battery device of claim 6, wherein The intermediate plate is provided with a first through hole configured as the first sub-exhaust part; the top plate is provided with a second through hole configured as the second sub-exhaust part.

8. The battery device of claim 6, wherein, The intermediate plate is provided with a first thinning part configured as the first sub-exhaust part; the top plate is provided with a second thinning part configured as the second sub-exhaust part, and the first thinning part and the second thinning part can be broken by gas when the pressure relief member is opened.

9. The battery device of claim 8, wherein, The first thinning part and the second thinning part are both provided with a notch.

10. The battery device according to any one of claims 1 to 9, characterized by The heat exchange mechanism further comprises a heat-resistant layer arranged at the bottom of the heat exchange mechanism, and the heat-resistant layer covers the bottom wall of the heat exchange mechanism.

11. An electrical device, characterized by The battery device comprises the battery device according to any one of claims 1-10.

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