Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment. The battery device comprises a battery monomer and a heat exchange mechanism, each single battery is provided with a first end surface, a second end surface and a side peripheral surface, the first end surface is provided with a pole, the second end surface and the first end surface are oppositely arranged at an interval, and the side peripheral surface is connected to the first end surface and the second end surface; the heat exchange mechanism is connected with the battery monomers in a heat exchange manner, and the heat exchange mechanism comprises at least two of a first heat exchange piece, a second heat exchange piece and a third heat exchange piece; the first heat exchange part and the first end face are oppositely arranged, the second heat exchange part and the second end face are oppositely arranged, and the third heat exchange part and the side circumferential face are oppositely arranged. The first end face is also provided with an anti-explosion valve, and the anti-explosion valve and the pole are arranged in a staggered manner; the first heat exchange piece is provided with an avoiding opening, the avoiding opening penetrates through the side, facing the first end face, of the first heat exchange piece and the side, back to the first end face, of the first heat exchange piece, and the avoiding opening and the anti-explosion valve are arranged correspondingly. According to the technical scheme, the heat dissipation and cooling efficiency of the battery monomers can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device and an electrical device using the battery device. Background Technology

[0002] Battery devices generate significant heat during operation, causing the temperature of individual battery cells to rise. Excessive heat negatively impacts the lifespan and performance of individual battery cells, affecting the reliability of the entire battery system. Therefore, achieving rapid heat dissipation from individual battery cells has become a pressing issue in battery technology. Utility Model Content

[0003] The main objective of this application is to provide a battery device and electrical equipment designed to improve the heat dissipation and cooling efficiency of individual battery cells.

[0004] To achieve the above objectives, the battery device proposed in this application includes:

[0005] A battery cell has a first end face, a second end face, and a side peripheral face. The first end face has an electrode post, the second end face is spaced apart from the first end face, and the side peripheral face is connected to the first and second end faces.

[0006] A heat exchange mechanism is provided in a heat exchange connection with a battery cell, and the heat exchange mechanism includes at least two of a first heat exchange element, a second heat exchange element, and a third heat exchange element.

[0007] The first heat exchanger is arranged opposite to the first end face, the second heat exchanger is arranged opposite to the second end face, and the third heat exchanger is arranged opposite to the side peripheral face.

[0008] The first end face is also equipped with an explosion-proof valve, which is offset from the pole post;

[0009] The first heat exchanger is provided with a clearance opening that extends through the side of the first heat exchanger facing the first end face and the side facing away from the first end face. The clearance opening is provided in correspondence with the explosion-proof valve.

[0010] The battery device of this application includes a heat exchange mechanism comprising at least two of a first heat exchanger, a second heat exchanger, and a third heat exchanger. This allows the heat exchange mechanism to exchange heat on at least two sides of the battery cell, including the side with the terminal post, the side opposite to the terminal post, and the peripheral side. This increases the heat exchange area between the heat exchange mechanism and the battery cell, thereby improving the heat dissipation and cooling efficiency of the battery cell. Furthermore, the first heat exchanger has a clearance opening that extends through both the side of the first heat exchanger facing the first end face and the side opposite to the first end face. This clearance opening also corresponds to an explosion-proof valve, allowing the first heat exchanger to pass over the explosion-proof valve of the battery cell, thus enabling the explosion-proof valve to perform normal pressure relief operations.

[0011] In some embodiments, the heat exchange mechanism includes a first heat exchanger, a second heat exchanger, and a third heat exchanger.

[0012] This allows the heat exchange mechanism to perform heat exchange on the top, bottom, and periphery of the battery cell, further increasing the heat exchange area between the heat exchange mechanism and the battery cell, which in turn helps to further improve the heat exchange and cooling efficiency of the battery cell.

[0013] In some embodiments, the side peripheral surface includes two opposing large surfaces and two opposing small surfaces, and the third heat exchanger is configured to be heat-exchange connected to the large surfaces.

[0014] This increases the heat exchange area between the third heat exchanger and the battery cell, thereby improving the heat exchange and cooling efficiency of the third heat exchanger for the battery cell.

[0015] In some embodiments, the first heat exchanger, the second heat exchanger, and the third heat exchanger are all provided with heat exchange channels.

[0016] Therefore, heat exchange medium can be introduced into the first, second, and third heat exchange components for heat exchange. Since the heat exchange medium is continuously flowing, the first, second, and third heat exchange components can continuously remove a large amount of heat from the battery cells, thereby improving the heat exchange efficiency of the battery cells.

[0017] In some embodiments, at least two of the first heat exchanger, the second heat exchanger, and the third heat exchanger are connected.

[0018] Therefore, one or two heat exchange medium circulation systems can be used to supply and discharge liquid to the heat exchange mechanism, which helps to simplify the number of parts.

[0019] In some embodiments, the first heat exchanger and the third heat exchanger are connected to form a heat exchange assembly, and the heat exchange assembly has a first communication port and a second communication port.

[0020] The second heat exchanger has a third connection port and a fourth connection port, and the second connection port is connected to the third connection port.

[0021] Therefore, the third heat exchanger can be connected in series with the heat exchange assembly so that the heat exchange medium can first exchange heat on the relatively hot top and peripheral parts of the battery cell when the temperature is relatively low, thereby further improving the heat exchange and cooling efficiency of the battery cell.

[0022] In some embodiments, the heat exchange mechanism further includes a connecting pipe, a three-way valve, and a transfer pipe, wherein the connecting pipe connects a second connecting port and a third connecting port;

[0023] The three-way valve is located on the connecting pipe, and the adapter pipe is connected to the three-way valve.

[0024] Therefore, depending on the heat generation of the individual battery cells, it is possible to selectively use a second heat exchanger.

[0025] In some embodiments, when the heat exchange mechanism includes a first heat exchange element and a third heat exchange element, both the first heat exchange element and the third heat exchange element are provided with heat exchange channels.

[0026] The first heat exchanger and the third heat exchanger are connected to form a heat exchange assembly, which has a first connection port and a second connection port.

[0027] Therefore, by connecting the first and third heat exchangers to form a single heat exchange assembly, a single heat exchange medium circulation system can be used for both liquid supply and discharge, thus simplifying the number of components. Furthermore, the first and third heat exchangers are relatively close together, facilitating their connection.

[0028] In some embodiments, the number of third heat exchangers is at least two, and the at least two third heat exchangers are arranged at intervals.

[0029] At least one battery cell is provided between two adjacent third heat exchangers, and the first heat exchanger is configured to connect at least two third heat exchangers.

[0030] Therefore, on the one hand, it eliminates the need for additional connecting pipes at both ends of the extension direction of the third heat exchanger to connect the various third heat exchangers in series, thus simplifying the number of components. On the other hand, since the first heat exchanger is located on the top side of the battery cell, it does not occupy the circumferential space of the battery cell like connecting pipes at both ends of the extension direction of the third heat exchanger. This allows for the stacking of more battery cells within the limited space of the battery box, thereby improving the energy density of the battery device.

[0031] In some embodiments, the normal direction of the first end face is defined as the first direction, and the arrangement direction of at least two third heat exchange elements is defined as the second direction;

[0032] The number of first heat exchangers is at least two, and the at least two first heat exchangers are arranged along a third direction, with the first direction, the second direction and the third direction intersecting each other;

[0033] In this configuration, at least some of the first heat exchangers are respectively configured to connect to at least two third heat exchangers.

[0034] Therefore, liquid can be supplied and discharged from the third heat exchanger through different first heat exchangers, so as to improve the liquid supply and discharge efficiency of the third heat exchanger, thereby improving the heat exchange and cooling efficiency of the battery cells.

[0035] In some embodiments, the number of first heat exchangers is multiple, and the heat exchange assembly further includes two manifolds;

[0036] One flow collector is connected to one end of the first heat exchanger in the second direction, and another flow collector is connected to one end of the first heat exchanger in the second direction.

[0037] One of the two current collectors is provided with a first connection port, and the other is provided with a second connection port.

[0038] Therefore, by setting the number of first heat exchangers to multiple, multiple heat exchange connections with individual battery cells can be achieved, thereby improving the heat exchange and cooling efficiency of the battery cells. The two current collectors allow for the collection of current from multiple first heat exchangers, enabling liquid supply to at least two first heat exchangers through a first connection port and liquid discharge to at least two first heat exchangers through a second connection port, thus simplifying the setting of the number of connection ports.

[0039] In some embodiments, at least two first pairs of connecting pipes are provided on the side of the first heat exchanger facing the third heat exchanger. The at least two first pairs of connecting pipes are arranged along the arrangement direction of the at least two third heat exchangers and are connected to the heat exchange flow channel in the first heat exchanger.

[0040] The third heat exchanger has a second pair of connecting pipes on the side facing the first heat exchanger. The second pair of connecting pipes is connected to the heat exchange flow channel inside the third heat exchanger, and each first pair of connecting pipes is connected to the second pair of connecting pipes of the third heat exchanger.

[0041] Therefore, it is convenient to connect and assemble the first heat exchanger with each of the third heat exchangers.

[0042] In some embodiments, the number of battery cells is at least two, and the battery device further includes a busbar electrically connected to the terminals in two adjacent battery cells.

[0043] The first heat exchanger is heat-exchange connected to at least one of the pole and the busbar.

[0044] This allows for targeted heat exchange and cooling of the areas on the top side of a battery cell that generate relatively large amounts of heat, thereby improving the heat exchange and cooling effect of the battery cell.

[0045] In some embodiments, the number of first heat exchangers is at least two, the at least two first heat exchangers are arranged at intervals, and the interval between at least partially adjacent first heat exchangers is formed as a clearance.

[0046] Therefore, by directly enclosing the clearance opening through two spaced first heat exchange components, it is not necessary to open holes in the first heat exchange components to form the clearance opening, which improves the convenience of forming the clearance opening and the convenience of manufacturing each first heat exchange component.

[0047] In some embodiments, at least two first heat exchangers are arranged along a third direction and both extend along a second direction, the second direction intersecting the third direction.

[0048] Therefore, extending the first heat exchanger along the second direction into a long strip-shaped liquid cooling pipe structure allows it to avoid the explosion-proof valves of individual battery cells when arranged side by side; at the same time, it also simplifies the structure of each first heat exchanger and improves the ease of manufacturing it.

[0049] In some embodiments, the number of battery cells is at least two, the at least two battery cells are arranged along a second direction and are corresponding to at least one first heat exchanger, and each first end face is provided with two poles along a third direction.

[0050] Therefore, the first heat exchanger can exchange heat with at least two battery cells arranged along a third direction, which helps to simplify the number of first heat exchangers. Moreover, the arrangement direction of the at least two first heat exchangers can be the same as the arrangement direction of the two poles on the battery cell, which can better utilize the space of the first end face of the battery cell in the arrangement direction of the two poles, so as to take into account the avoidance of the explosion-proof valve and improve the convenience of the arrangement of the first heat exchangers.

[0051] In some embodiments, at least two battery cells are configured as pole posts facing each other in a second direction to form a pole post assembly, and in a third direction, a first heat exchanger is located on at least one of the opposing sides of the pole post assembly.

[0052] This allows the first heat exchanger and the terminal assembly to be arranged side by side in the horizontal direction. By utilizing the space gap formed by the stacked terminals and busbars between the first end face and the cover, the first heat exchanger can be installed within this space gap without increasing or excessively increasing the height of the battery device in the first direction. This improves the utilization rate of the space inside the battery box, thereby reducing the overall size of the battery device.

[0053] On the other hand, the electrical equipment proposed in this application includes the battery device of any of the above embodiments. Attached Figure Description

[0054] 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 the structures shown in these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application;

[0056] Figure 2 This is an exploded structural diagram of an embodiment of the battery device of this application;

[0057] Figure 3 This is an exploded structural diagram of a single battery cell according to an embodiment of this application;

[0058] Figure 4 This is an exploded structural diagram of another embodiment of the battery device of this application;

[0059] Figure 5 This is an exploded structural diagram of yet another embodiment of the battery device of this application;

[0060] Figure 6 for Figure 5 A magnified view of a portion of point A in the middle;

[0061] Figure 7 This is a schematic diagram of the structure of an embodiment of the heat exchange component of this application;

[0062] Figure 8 for Figure 7 A partial structural diagram of the heat exchange component;

[0063] Figure 9 for Figure 7 Another perspective of the heat exchange component;

[0064] Figure 10 for Figure 9 A magnified view of a portion of point B in the middle;

[0065] Figure 11 This is a schematic diagram showing the interaction between the battery cell and the first heat exchanger in the battery device of this application.

[0066] Explanation of icon numbers:

[0067] 100. Battery assembly; 1. Battery box; 1a. Receptacle; 11. Box cover; 12. Box body; 20. Battery cell; 21. End cap; 21a. Terminal post; 21c. Explosion-proof valve; 22. Housing; 23. Electrode assembly; 231. Tab; 24. First end face; 25. Second end face; 26. Side peripheral face; 261. Large surface; 263. Small surface; 27. Terminal post assembly; 20A. Battery pack; 30. Heat exchange mechanism; 31. First Heat exchanger; 31a, clearance port; 311, manifold; 315, first connecting pipe; 33, second heat exchanger; 331, third connecting port; 333, fourth connecting port; 35, third heat exchanger; 351, second connecting pipe; 36, heat exchange assembly; 361, first connecting port; 363, second connecting port; 37, connecting pipe; 38, three-way valve; 39, transfer pipe; 1000, vehicle; 200, controller; 300, motor.

[0068] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0069] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0070] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0071] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0072] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0073] A battery device, or energy storage device, is widely used not only in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in other fields. A battery device may include a battery box and individual battery cells housed within the battery box. The battery box may include a box body and a cover that closes to the box body to enclose a cavity containing the individual battery cells. The individual battery cell is the smallest unit comprising a battery, typically including a battery casing and an electrode assembly housed within the casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. Furthermore, at least two individual battery cells within the battery box may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0074] Furthermore, since battery devices generate heat during operation, heat exchange mechanisms are typically incorporated to cool the individual battery cells. However, with the development of fast charging technology, charging rates are increasing, and battery cells generate a significant amount of heat during high-rate fast charging. In this case, the heat exchange mechanisms in existing technologies are insufficient to meet the heat dissipation and cooling requirements of high-rate fast charging.

[0075] Therefore, based on the above considerations, in order to solve the problem that the heat dissipation and cooling of battery cells in related technologies cannot meet the heat dissipation requirements of high-rate fast charging, this application proposes a novel battery device. This battery device innovatively configures a heat exchange mechanism including at least two of a first heat exchanger, a second heat exchanger, and a third heat exchanger, so as to perform heat exchange and cooling on at least two sides of the top, bottom, and peripheral sides of the battery cell, thereby increasing the heat exchange area between the heat exchange mechanism and the battery cell, and thus improving the heat exchange and cooling efficiency of the battery cell.

[0076] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0077] For ease of explanation, the following embodiments will use a vehicle as an example of an electrical device according to an embodiment of this application.

[0078] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also 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 power needs of the vehicle 1000 during starting, navigation, and driving.

[0079] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Please refer to Figure 2 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a battery case 1 and a battery cell 20; the battery case 1 has a receiving cavity 1a, and the battery cell 20 is disposed inside the battery case 1.

[0081] The battery case 1 can be used to form a receiving cavity 1a to provide a space for accommodating the battery cell 20. The battery case 1 can adopt various structures. In some embodiments, the battery case 1 can include a cover 11 and a body 12 that overlap each other to jointly define the receiving cavity 1a for accommodating the battery cell 20. In this case, the body 12 can provide accommodating support for the battery cell 20. In addition, both the cover 11 and the body 12 can be hollow structures with an opening on one side. In this case, the opening side of the cover 11 can cover the opening side of the body 12. Of course, the cover 11 can also be a plate structure and cover the opening side of the body 12. In addition, the battery case 1 formed by the cover 11 and the body 12 can be of various shapes, such as a cylinder, a cuboid, etc. Furthermore, the cover 11 and the body 12 can be arranged along a first direction.

[0082] A battery cell 20 refers to the smallest unit constituting the battery device 100. The number of battery cells 20 can be one, two, or more. When there are multiple battery cells 20, they can be connected in series, parallel, or a combination thereof. A combination thereof means that multiple battery cells 20 are connected in both series and parallel. When the battery device 100 is in its normal installation and use state, the first direction can be defined as the vertical direction, and the second and third directions can be two intersecting horizontal directions. In this case, the multiple battery cells 20 can be arranged in a row along the second direction, or further arranged in at least two rows along the third direction. Alternatively, the multiple battery cells 20 can also be arranged in a row along the third direction, or further arranged in at least two rows along the second direction. This application does not limit the arrangement direction of the multiple battery cells 20. Of course, the first direction can also be other directions, and this application does not limit the specific direction type of the first, second, and third directions.

[0083] In addition, the battery device 100 may include other structures, such as busbars, for electrical connection between multiple battery cells 20. Furthermore, each battery cell 20 may be a secondary or primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, cuboid, or other shapes.

[0084] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell 20 provided in some embodiments of this application. The battery cell 20 includes an end cap 21, a housing 22, an electrode assembly 23, and other functional components.

[0085] End cap 21 refers to a component that covers the opening of housing 22 to isolate the internal environment of battery cell 20 from the external environment. The shape of end cap 21 can be adapted to the shape of housing 22 to fit it. Optionally, end cap 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that end cap 21 is not easily deformed under pressure and impact, giving battery cell 20 higher structural strength and improved safety performance. Functional components such as terminals 21a can be provided on end cap 21. Terminals 21a can be used to electrically connect to electrode assembly 23 for outputting or inputting electrical energy into battery cell 20. In some embodiments, end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 20 reaches a threshold. The material of end cap 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose any special limitations on this. In some embodiments, an insulating element may be provided on the inner side of the end cap 21. The insulating element can be used to isolate the electrical connection components within the housing 22 from the end cap 21 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0086] The housing 22 is a component used to cooperate with the end cap 21 to form the internal environment of the battery cell 20. This internal environment can accommodate the electrode assembly 23, electrolyte, and other components. The housing 22 and the end cap 21 can be independent components. An opening can be provided on the housing 22, and the end cap 21 can be used to close the opening to form the internal environment of the battery cell 20. Alternatively, the end cap 21 and the housing 22 can be integrated. Specifically, the end cap 21 and the housing 22 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 22, the end cap 21 closes the housing 22. The housing 22 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special limitations on this.

[0087] Electrode assembly 23 is the component in the battery cell 20 where the electrochemical reaction occurs. The casing 22 may contain one or more electrode assemblies 23. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 23, while the portions of the positive and negative electrode sheets without active material each constitute a tab 231. The positive and negative tabs may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 231 connect to the terminals 21a to form a current circuit.

[0088] Please refer to the reference. Figures 3 to 5 In one embodiment of this application, the battery cell 20 has a first end face 24, a second end face 25, and a side peripheral face 26. The first end face 24 is provided with an electrode post 21a. The second end face 25 is disposed at a distance from the first end face 24. The side peripheral face 26 is connected to the first end face 24 and the second end face 25. The battery device 100 also includes a heat exchange mechanism 30, which is heat exchanged with the battery cell 20. The heat exchange mechanism 30 includes at least two of a first heat exchange element 31, a second heat exchange element 33, and a third heat exchange element 35. The first heat exchange element 31 is disposed opposite to the first end face 24, the second heat exchange element 33 is disposed opposite to the second end face 25, and the third heat exchange element 35 is disposed opposite to the side peripheral face 26.

[0089] The first end face 24 of the battery cell 20 can be located on the end cap 21 of the battery cell 20 for mounting the terminal post 21a. (Please refer to the reference for further details.) Figure 3 and Figure 11 In some embodiments, an explosion-proof valve 21c or similar device for depressurizing the battery cell 20 may be further provided. Additionally, when the first direction is vertical as described above, the first end face 24 may be oriented upwards, forming the top surface of the battery cell 20. Of course, in other embodiments, the first end face 24 may also be oriented towards other sides.

[0090] The second end face 25 of the battery cell 20 can be located on the outside of the casing 22 of the battery cell 20, directly opposite its opening. Wherein, when the first end face 24 is positioned upwards and forms the top surface of the battery cell 20, the second end face 25 can be positioned downwards and form the bottom surface of the battery cell 20.

[0091] The side peripheral surface 26 of the battery cell 20 may be located outside the opening of the housing 22 of the battery cell 20. The side peripheral surface 26 may include two opposing large surfaces 261 and two opposing small surfaces 263, wherein the area of ​​the large surfaces 261 is larger than the area of ​​the small surfaces 263.

[0092] The heat exchange mechanism 30 can be used to connect with the battery cell 20 for heat exchange, thereby cooling the battery cell 20. Of course, in some instances, where the ambient temperature is relatively low, the heat exchange mechanism 30 can also be used to heat the battery cell 20. The heat exchange connection proposed in this application refers to a connection where the two connected components can exchange heat, including direct contact and indirect heat exchange through air or other objects. In addition, the heat exchange mechanism 30 includes at least two of the first heat exchange element 31, the second heat exchange element 33, and the third heat exchange element 35. This means that the heat exchange mechanism 30 may include only any two of the first heat exchange element 31, the second heat exchange element 33, and the third heat exchange element 35. For example, it may include the first heat exchange element 31 and the second heat exchange element 33, the first heat exchange element 31 and the third heat exchange element 35, or the second heat exchange element 33 and the third heat exchange element 35. Of course, the heat exchange mechanism 30 may include three of the first heat exchange element 31, the second heat exchange element 33, and the third heat exchange element 35.

[0093] The first heat exchanger 31 can be opposite to the first end face 24, or it can be said to be disposed on the top side of the battery cell 20, so as to perform heat exchange on the top side of the battery cell 20. Specifically, the first heat exchanger 31 can be heat-exchange connected to the first end face 24, or heat-exchange connected to the electrode post 21a on the first end face 24, or heat-exchange connected to the busbar disposed on the electrode post 21a, or heat-exchange connected to at least two of the first end face 24, the electrode post 21a, and the busbar. Therefore, this application does not limit the specific heat exchange object of the first heat exchanger 31 in the battery cell 20, as long as it can achieve heat exchange with the battery cell 20. In addition, the first heat exchanger 31 can be provided with a heat exchange channel to exchange heat by introducing a heat exchange medium such as water or oil, so that the first heat exchanger 31 forms a liquid-cooled plate structure or a liquid-cooled pipe structure. Of course, the first heat exchanger 31 can also be a phase change energy storage structure that exchanges heat through the absorption and release of heat by the phase change material. This application does not limit the structural type of the first heat exchanger 31. Moreover, when there are multiple battery cells 20, the number of first heat exchangers 31 can be set to one to form a heat exchange connection with multiple battery cells 20. Of course, the number of first heat exchangers 31 can also be set to multiple, so that each battery cell 20 can be heat exchanged through at least one first heat exchanger 31. This application does not limit the number of first heat exchangers 31.

[0094] The second heat exchanger 33 can be opposite to the second end face 25, or it can be said to be disposed on the bottom side of the battery cell 20 to perform heat exchange on the bottom side of the battery cell 20. The second heat exchanger 33 may have a heat exchange channel to facilitate heat exchange by introducing a heat exchange medium such as water or oil, thus forming a liquid-cooled plate structure or a liquid-cooled pipe structure. Alternatively, the second heat exchanger 33 can also be a phase change energy storage structure that uses the heat absorption and release of a phase change material for heat exchange; this application does not limit the structural type of the second heat exchanger 33. Furthermore, when there are multiple battery cells 20, the number of second heat exchangers 33 can be set to one to connect to multiple battery cells 20 for heat exchange. Alternatively, the number of second heat exchangers 33 can be multiple, so that each battery cell 20 can be connected to at least one second heat exchanger 33 for heat exchange; this application also does not limit the number of second heat exchangers 33.

[0095] The third heat exchanger 35 can be opposite to the side peripheral surface 26, or it can be said to be disposed on the periphery of the battery cell 20 to perform heat exchange on the periphery of the battery cell 20. The third heat exchanger 35 may have heat exchange channels to facilitate heat exchange by introducing heat exchange media such as water or oil, thus forming a liquid-cooled plate structure or a liquid-cooled pipe structure. Of course, the third heat exchanger 35 can also be a phase change energy storage structure that exchanges heat through the absorption and release of heat by a phase change material; this application does not limit the structural type of the third heat exchanger 35. Furthermore, the third heat exchanger 35 can be heat-exchange connected to the large surface 261 of the side peripheral surface 26, or it can be heat-exchange connected to the small surface 263 of the side peripheral surface 26, or it can be heat-exchange connected to both the large surface 261 and the small surface 263 of the side peripheral surface 26. Furthermore, when there are multiple battery cells 20, the number of third heat exchangers 35 can be set to one, for example, by forming a continuously bent S-shaped structure to connect with multiple battery cells 20 for heat exchange. Of course, the number of third heat exchangers 35 can also be set to multiple, so that each battery cell 20 can be connected for heat exchange through at least one third heat exchanger 35. This application does not limit the number of third heat exchangers 35.

[0096] The battery device 100 of this application includes a heat exchange mechanism 30 comprising at least two of a first heat exchange element 31, a second heat exchange element 33, and a third heat exchange element 35. This allows the heat exchange mechanism 30 to exchange heat with at least two sides of the battery cell 20, including the side with the electrode post 21a, the side opposite to the electrode post 21a, and the peripheral side. This increases the heat exchange area between the heat exchange mechanism 30 and the battery cell 20, thereby improving the heat dissipation and cooling efficiency of the battery cell 20.

[0097] Please refer to the reference. Figure 5 , Figure 6as well as Figure 11 In one embodiment of this application, the first end face 24 is further provided with an explosion-proof valve 21c, which is offset from the pole post 21a; the first heat exchanger 31 is provided with a relief opening 31a, which penetrates the side of the first heat exchanger 31 facing the first end face 24 and the side facing away from the first end face 24, and the relief opening 31a is correspondingly provided with the explosion-proof valve 21c.

[0098] The explosion-proof valve 21c is used to release pressure when the internal pressure of the battery cell 20 becomes too high due to thermal runaway or other reasons. The explosion-proof valve 21c is offset from the terminal post 21a, meaning that the explosion-proof valve 21c and the terminal post 21a are spaced apart on the first end face 24. For example, when there are two spaced-apart terminal posts 21a on the first end face 24, the explosion-proof valve 21c can be located between the two terminal posts 21a. The clearance port 31a allows gas to pass through the explosion-proof valve 21c during pressure release; therefore, the clearance port 31a penetrates both the side of the first heat exchanger 31 facing the first end face 24 and the side facing away from the first end face 24. When the normal direction of the first end face 24 is the first direction, it can also be said that the clearance port 31a penetrates both sides of the first heat exchanger 31 in the first direction. Furthermore, the clearance opening 31a can be formed through the gap between two adjacent first heat exchange elements 31, as described below, or it can be formed directly at the opening of the first heat exchange element 31. Additionally, at least two explosion-proof valves 21c on each battery cell 20 can be provided with one clearance opening 31a, allowing at least two explosion-proof valves 21c to be cleared through one clearance opening 31a. Alternatively, each explosion-proof valve 21c on each battery cell 20 can be provided with one clearance opening 31a, allowing one explosion-proof valve 21c to be cleared through one clearance opening 31a.

[0099] In this embodiment, a clearance opening 31a is provided on the first heat exchanger 31, and the clearance opening 31a extends through both sides of the first heat exchanger 31. It is also correspondingly provided with the explosion-proof valve 21c, so that the first heat exchanger 31 can avoid the explosion-proof valve 21c of the battery cell 20 through the clearance opening 31a, so that the explosion-proof valve 21c can perform normal pressure relief work in the future.

[0100] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the heat exchange mechanism 30 includes a first heat exchange element 31, a second heat exchange element 33, and a third heat exchange element 35.

[0101] In this embodiment, the heat exchange mechanism 30 is configured to include a first heat exchange element 31, a second heat exchange element 33, and a third heat exchange element 35, so that the heat exchange mechanism 30 can play a heat exchange role on the top, bottom, and peripheral sides of the battery cell 20, which can further increase the heat exchange area between the heat exchange mechanism 30 and the battery cell 20, thereby helping to further improve the heat exchange and cooling efficiency of the battery cell 20.

[0102] In one embodiment of this application, the third heat exchanger 35 is heat-exchange connected to the large surface 261.

[0103] In this embodiment, the third heat exchanger 35 is configured to face the large surface 261 in the side peripheral surface 26, which can increase the heat exchange area between the third heat exchanger 35 and the battery cell 20, thereby improving the heat exchange and cooling efficiency of the third heat exchanger 35 on the battery cell 20.

[0104] In one embodiment of this application, heat exchange channels are provided in the first heat exchanger 31, the second heat exchanger 33 and the third heat exchanger 35.

[0105] The heat exchange channel can be used for the passage of the heat exchange medium. The heat exchange channel inside the first heat exchanger 31 can be a cavity or a long strip. When the heat exchange channel inside the first heat exchanger 31 extends in a long strip shape, it can extend linearly, or at least partially in an S-shape, or in a U-shape. This application does not limit the extension shape of the heat exchange channel inside the first heat exchanger 31.

[0106] Similarly, the heat exchange channel inside the second heat exchanger 33 can be a cavity or a long strip. When the heat exchange channel inside the second heat exchanger 33 extends in a long strip shape, it can extend linearly, at least partially in an S-shape, or in a U-shape. This application does not limit the extension shape of the heat exchange channel inside the second heat exchanger 33. The heat exchange channel inside the third heat exchanger 35 can be a cavity or a long strip. When the heat exchange channel inside the third heat exchanger 35 extends in a long strip shape, it can extend linearly, at least partially in an S-shape, or in a U-shape. This application does not limit the extension shape of the heat exchange channel inside the third heat exchanger 35.

[0107] Furthermore, the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 can all be isolated. In this case, three sets of heat exchange medium circulation systems can be set up to supply and discharge liquid to the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 respectively, so that the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 can work independently. Of course, any two of the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 can be connected, or all three of them can be connected. The connection method can be series or parallel. This application does not limit the connection method between the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35. In addition, the heat exchange medium circulation system may include a circulation pipe and a power pump installed on the circulation pipe. The circulation pipe can be used for liquid supply and liquid discharge, and the power pump can be used to drive the heat exchange medium to circulate in the first heat exchanger 31, the second heat exchanger 33, the third heat exchanger 35 and the circulation pipe.

[0108] In this embodiment, heat exchange channels are provided in the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35, so that heat exchange medium can be introduced into the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 for heat exchange. The heat exchange medium is continuously flowing, thereby enabling the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 to continuously remove a large amount of heat from the battery cell 20, thereby improving the heat exchange efficiency of the battery cell 20.

[0109] In one embodiment of this application, at least two of the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 are connected.

[0110] "At least two are connected" means that any two of the three heat exchangers 31, 33 and 35 can be connected, or the three heat exchangers 31, 33 and 35 can be connected.

[0111] In this embodiment, at least two of the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 are connected, so that one or two heat exchange medium circulation systems can be used to supply and discharge liquid to the heat exchange mechanism 30, which helps to simplify the number of components.

[0112] Please refer to the reference. Figure 4 , Figure 5 , Figure 7 as well as Figure 8In one embodiment of this application, the first heat exchanger 31 and the third heat exchanger 35 are connected to form a heat exchange assembly 36, which has a first communication port 361 and a second communication port 363.

[0113] The connection between the first heat exchanger 31 and the third heat exchanger 35 can be in series or in parallel, as long as they form a single heat exchange assembly 36. The heat exchange assembly 36 has a first connection port 361 and a second connection port 363, referring to the locations of the heat exchange assembly 36 used for liquid supply and discharge. The first connection port 361 and the second connection port 363 can be directly located in the first heat exchanger 31; of course, when the first heat exchanger 31 is connected to a manifold 311 as described below, the first connection port 361 and the second connection port 363 can also be located in the manifold 311; alternatively, the first connection port 361 and the second connection port 363 can both be located in the third heat exchanger 35; or, one of the first connection port 361 and the second connection port 363 can be located in the first heat exchanger 31, and the other in the third heat exchanger 35.

[0114] In this embodiment, the first heat exchanger 31 and the third heat exchanger 35 are connected to form a heat exchange assembly 36. A single heat exchange medium circulation system can be used for supplying and discharging the liquid, thus simplifying the number of components. Furthermore, the first heat exchanger 31 and the third heat exchanger 35 are relatively close, facilitating communication between them.

[0115] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the second heat exchanger 33 has a third communication port 331 and a fourth communication port 333, and the second communication port 363 is connected to the third communication port 331.

[0116] In this embodiment, the third heat exchanger 35 can be connected in series with the heat exchange assembly 36, allowing liquid to enter through the first connecting port 361 and exit through the fourth connecting port 333. In this case, the heat exchange medium can first pass through the heat exchange assembly 36 and then through the second heat exchanger 33, so that heat can be exchanged first on the relatively hot top and peripheral sides of the battery cell 20, and then on the relatively cool bottom side of the battery cell 20. This allows the heat exchange medium to first exchange heat on the relatively hot parts of the battery cell 20 at a relatively low temperature, thereby further improving the heat exchange and cooling efficiency of the battery cell 20.

[0117] Of course, this application is not limited to this. In other embodiments, liquid can be introduced through the fourth connecting port 333 and discharged through the first connecting port 361.

[0118] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the heat exchange mechanism 30 further includes a connecting pipe 37, a three-way valve 38, and a transfer pipe 39. The connecting pipe 37 connects to the second connecting port 363 and the third connecting port 331. The three-way valve 38 is disposed on the connecting pipe 37, and the transfer pipe 39 is connected to the three-way valve 38.

[0119] In this embodiment, by providing a connecting pipe 37, a three-way valve 38, and a transfer pipe 39, the transfer pipe 39 can be connected in parallel with the second heat exchanger 33. At this time, the use of the second heat exchanger 33 can be selectively adjusted based on the heat generation of the battery cell 20. For example, when the heat generation of the battery cell 20 is relatively high, the flow from the second connecting port 363 to the third connecting port 331 can be opened by the three-way valve 38, and the flow of the transfer pipe 39 can be closed, allowing the heat exchange medium to enter the second heat exchanger 33. This enables the heat exchange mechanism 30 to exchange heat on three sides of the battery cell 20 through the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35. When the heat generation of the battery cell 20 is relatively small, the flow direction from the second connection port 363 to the third connection port 331 can be closed by the three-way valve 38, and the flow direction of the transfer pipe 39 can be opened, so that the heat exchange medium will not enter the second heat exchange element 33, but will flow out directly through the transfer pipe 39. The heat exchange mechanism 30 can exchange heat on both sides of the battery cell 20 through the first heat exchange element 31 and the third heat exchange element 35. Among them, the end of the first connection port 361 and the connecting pipe 37 away from the three-way valve 38 can be connected to the main liquid inlet and the main liquid outlet of the battery device 100, respectively.

[0120] In one embodiment of this application, when the heat exchange mechanism 30 includes a first heat exchange element 31 and a third heat exchange element 35, both the first heat exchange element 31 and the third heat exchange element 35 are provided with heat exchange channels, and the first heat exchange element 31 and the third heat exchange element 35 are connected.

[0121] In this embodiment, the first heat exchanger 31 and the third heat exchanger 35 are connected to form a heat exchange assembly 36. A single heat exchange medium circulation system can be used for supplying and discharging the liquid, thus simplifying the number of components. Furthermore, the first heat exchanger 31 and the third heat exchanger 35 are relatively close, facilitating communication between them.

[0122] Please refer to the reference. Figures 4 to 7 In one embodiment of this application, the number of third heat exchangers 35 is at least two, and the at least two third heat exchangers 35 are arranged at intervals; at least one battery cell 20 is provided between two adjacent third heat exchangers 35, and the first heat exchanger 31 is configured to connect at least two third heat exchangers 35.

[0123] The provision of at least one battery cell 20 between two adjacent third heat exchangers 35 means that, in the arrangement direction of at least two third heat exchangers 35, one battery cell 20 can be disposed between two adjacent third heat exchangers 35, so that the opposite sides of each battery cell 20 can exchange heat through the two adjacent third heat exchangers 35, thereby increasing the heat exchange area between the battery cell 20 and the third heat exchanger 35 and improving the heat exchange efficiency. Of course, in the arrangement direction of at least two third heat exchangers 35, two or more battery cells 20 can also be disposed between two adjacent third heat exchangers 35, or all battery cells 20 can be disposed between two adjacent third heat exchangers 35. That is, this application does not limit the arrangement of battery cells 20 and third heat exchangers 35; battery cells 20 and third heat exchangers 35 can be arranged alternately, or at least two or all of the battery cells 20 can be located between two adjacent third heat exchangers 35. The first heat exchanger 31 is configured to connect at least two third heat exchangers 35, meaning that at least two third heat exchangers 35 can be connected through the first heat exchanger 31, thereby enabling liquid supply and / or liquid discharge to each third heat exchanger 35.

[0124] In this embodiment, at least two third heat exchangers 35 are connected by the first heat exchanger 31. On the one hand, this eliminates the need for additional connecting pipes 37 at both ends of the third heat exchangers 35 in the extending direction, thus simplifying the number of components. On the other hand, the first heat exchanger 31 is located on the top side of the battery cell 20, so it does not occupy the circumferential space of the battery cell 20 at both ends of the extending direction of the third heat exchanger 35, unlike the connecting pipes 37. This allows for the stacking of more battery cells 20 within the limited space of the battery box 1, thereby improving the energy density of the battery device 100.

[0125] Please refer to Figure 7 In one embodiment of this application, the first heat exchanger 31 may extend along the arrangement direction of at least two third heat exchangers 35 to form a long strip liquid cooling pipe structure, thereby facilitating the connection of all the third heat exchangers 35.

[0126] In one embodiment of this application, the normal direction of the first end face 24 is defined as the first direction, and the arrangement direction of at least two third heat exchangers 35 is defined as the second direction; the number of first heat exchangers 31 is at least two, and at least two first heat exchangers 31 are arranged along a third direction, with the first direction, the second direction, and the third direction intersecting each other; wherein, at least some of the first heat exchangers 31 are respectively configured to connect to at least two third heat exchangers 35.

[0127] In this embodiment, the number of first heat exchangers 31 is set to at least two, and at least some of the heat exchangers are used to connect at least two third heat exchangers 35 respectively, so that liquid can be supplied and discharged from the third heat exchangers 35 through different first heat exchangers 31, so as to improve the liquid supply and discharge efficiency of the third heat exchangers 35, thereby improving the heat exchange and cooling efficiency of the battery cell 20.

[0128] Of course, this application is not limited to this. In other embodiments, when the number of the first heat exchanger 31 is one, it is also possible that the first heat exchanger 31 is provided with a heat exchange channel that is isolated from each other, so as to supply liquid and discharge liquid to the third heat exchanger 35 respectively.

[0129] Please refer to the reference. Figure 7 and Figure 8 In one embodiment of this application, the number of first heat exchanger 31 is multiple, and the heat exchange assembly 36 further includes two collectors 311; one collector 311 is connected to one end of a portion of the first heat exchanger 31 in a second direction, and the other collector 311 is connected to one end of another portion of the first heat exchanger 31 in a second direction; one of the two collectors 311 is provided with a first connecting port 361, and the other is provided with a second connecting port 363.

[0130] In this embodiment, multiple first heat exchange elements 31 are provided, enabling multiple heat exchange connections with the battery cell 20, thereby improving the heat exchange and cooling efficiency of the battery cell 20. The two collectors 311 allow for the collection of liquid from multiple first heat exchange elements 31, enabling liquid supply to at least two first heat exchange elements 31 through a first connection port 361 and liquid discharge to at least two first heat exchange elements 31 through a second connection port 363. Figure 7 and Figure 8 The dashed arrows indicate the flow direction of the heat exchange medium to simplify the setting of the number of connection ports. In addition, when there are multiple first heat exchange elements 31, at least two first heat exchange elements 31 can supply liquid to the third heat exchange element 35, and at least two first heat exchange elements 31 can supply liquid to the third heat exchange element 35, which is conducive to further improving the liquid supply and liquid discharge efficiency of the third heat exchange element 35.

[0131] Please refer to the reference. Figures 8 to 10In one embodiment of this application, the first heat exchanger 31 is provided with at least two first pairs of connecting pipes 315 on the side facing the third heat exchanger 35. The at least two first pairs of connecting pipes 315 are arranged along the arrangement direction of at least two third heat exchangers 35 and are connected to the heat exchange channel in the first heat exchanger 31. The third heat exchanger 35 is provided with a second pair of connecting pipes 351 on the side facing the first heat exchanger 31. The second pair of connecting pipes 351 are connected to the heat exchange channel in the third heat exchanger 35. Each first pair of connecting pipes 315 is connected to a second pair of connecting pipes 351 of a third heat exchanger 35.

[0132] In this embodiment, the arrangement of the first pair of connecting pipes 315 and the second pair of connecting pipes 351 facilitates the docking and assembly of the first heat exchanger 31 and each of the third heat exchangers 35. The first pair of connecting pipes 315 and the second pair of connecting pipes 351 can be welded, adhesively bonded, or inserted and secured by snap-fit ​​or magnetic attraction.

[0133] Of course, this application is not limited to this. In other embodiments, the first heat exchanger 31 and the third heat exchanger 35 can be directly connected by openings.

[0134] In one embodiment of this application, the number of battery cells 20 is at least two, and the battery device 100 further includes a busbar electrically connected to the terminals 21a in two adjacent battery cells 20; the first heat exchanger 31 is heat-exchange connected to at least one of the terminals 21a and the busbar.

[0135] In this embodiment, the first heat exchanger 31 is connected to at least one of the electrode post 21a and the busbar in a heat exchange configuration. When the battery cell 20 is working, the top electrode post 21a generates a relatively large amount of heat. Therefore, by positioning the first heat exchanger 31, targeted heat exchange and cooling can be achieved for the part of the battery cell 20 with a relatively large amount of heat generated on the top side, thereby improving the heat exchange and cooling effect of the battery cell 20.

[0136] Please refer to the reference. Figure 5 , Figure 7 as well as Figure 11 In one embodiment of this application, the number of first heat exchange elements 31 is at least two, and the at least two first heat exchange elements 31 are arranged at intervals, with the interval between two adjacent first heat exchange elements 31 forming a clearance opening 31a.

[0137] In this embodiment, the clearance opening 31a is formed by directly enclosing two spaced first heat exchange elements 31, so that there is no need to open the opening on the first heat exchange element 31 to form the clearance opening 31a, which is conducive to improving the convenience of forming the clearance opening 31a and the convenience of manufacturing each first heat exchange element 31; at the same time, it can also facilitate the improvement of the sealing of the heat exchange flow channel in each first heat exchange element 31.

[0138] In this case, only two adjacent first heat exchange elements 31 may be enclosed to form a clearance opening 31a, such as... Figure 11 As shown, the clearance opening 31a can be formed by two first heat exchange elements 31 located between the two terminals 21a of the battery cell 20. Of course, in some embodiments, when each of the first heat exchange elements 31 is located between the two terminals 21a of the battery cell 20, it can also be said that any two adjacent first heat exchange elements 31 can form the clearance opening 31a. Therefore, in short, the clearance opening 31a can be formed by at least two partially adjacent first heat exchange elements 31.

[0139] Please refer to the reference. Figure 5 and Figure 7 In one embodiment of this application, at least two first heat exchange elements 31 are arranged along a third direction and both extend along a second direction, the second direction intersecting the third direction.

[0140] In this embodiment, the first heat exchanger 31 can be a liquid-cooled pipe structure, and the number can be set to multiple and arranged side by side to reduce the volume of each first heat exchanger 31. This allows it to avoid obstructing the explosion-proof valve 21c on the top of the battery cell 20 in the side-by-side direction. Simultaneously, the multiple side-by-side first heat exchangers 31 can achieve multiple heat exchange connections with the battery cell 20, thereby increasing the heat exchange area and improving heat exchange and cooling efficiency. Furthermore, the elongated liquid-cooled pipe structure also simplifies the structure of each first heat exchanger 31, improving its manufacturing convenience.

[0141] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, the number of battery cells 20 is at least two. At least two battery cells 20 are arranged along the second direction and are correspondingly arranged with at least one first heat exchanger 31. The first end face 24 of each battery cell 20 is provided with two poles 21a (positive pole and negative pole, respectively) along the third direction.

[0142] In this embodiment, the first heat exchanger 31 can exchange heat with at least two battery cells 20 arranged along a third direction, thereby simplifying the number of first heat exchangers 31. Furthermore, the arrangement direction of the at least two first heat exchangers 31 can be the same as the arrangement direction of the two terminals 21a on the battery cell 20. Since the arrangement direction of the two terminals 21a on the battery cell 20 is typically the length direction of the battery cell 20, this arrangement of the first heat exchangers 31 can better utilize the space of the first end face 24 of the battery cell 20 in the arrangement direction of the two terminals 21a, thus balancing the avoidance of the explosion-proof valve 21c and improving the convenience of arranging the first heat exchangers 31. Simultaneously, the first heat exchanger 31 can be connected to each of the third heat exchangers 35 by establishing a heat exchange connection with the large surface 261 of the battery cell 20, resulting in a large heat exchange area.

[0143] Please refer to the reference. Figure 5 and Figure 6 At least two battery cells 20 are configured as pole posts 21a facing each other in the second direction to form pole post assemblies 27; the number of first heat exchangers 31 is at least two, and both extend along the second direction, with each pole post assembly 27 corresponding to at least one first heat exchanger 31.

[0144] The terminal assembly 27 can be composed of terminal posts 21a facing each other in the second direction. At least two battery cells 20 arranged along the second direction can be defined as forming a battery pack 20A, such as... Figure 2 and Figure 5 As shown. At this time, the battery pack 20A can be configured with two rows of terminal post assemblies 27, arranged along a third direction. Furthermore, the correspondence between the first heat exchanger 31 and the terminal post assembly 27 can be such that the first heat exchanger 31 is stacked on top of the terminal post assembly 27 along a first direction, or it can be positioned on the third-direction upward side of the terminal post assembly 27.

[0145] In this embodiment, by providing at least one first heat exchanger 31 for each terminal post assembly 27, heat exchange and cooling effects can be achieved for the terminal post 21a region with high heat generation, as described above. Furthermore, heat exchange and cooling effects can be achieved for each terminal post assembly 27, thereby improving the heat exchange and cooling effect on the battery cell 20. Simultaneously, by configuring each first heat exchanger 31 as a long strip-shaped liquid cooling pipe structure extending along the second direction and arranged side-by-side in the third direction, the placement of the explosion-proof valve 21c on the top side of the battery cell 20 can be conveniently staggered, allowing the explosion-proof valve 21c to perform normal pressure relief operations subsequently.

[0146] Please refer to the reference. Figure 5 and Figure 6In one embodiment of this application, in the third-party direction, the first heat exchanger 31 is located on at least one of the opposite sides of the pole assembly 27.

[0147] In this embodiment, the first heat exchanger 31 is disposed on at least one of the three upward-facing sides of the terminal assembly 27, such that the first heat exchanger 31 and the terminal assembly 27 are arranged side by side in the horizontal direction. This allows the installation of the first heat exchanger 31 within the space formed by the stacked terminal 21a and busbar between the first end face 24 and the cover 11, without increasing or excessively increasing the height of the battery device 100 in the first direction. This improves the utilization rate of the space within the battery box 1, thereby reducing the overall volume of the battery device 100.

[0148] Please refer to the reference. Figure 5 and Figure 6 In one embodiment of this application, in order to improve the heat exchange and cooling efficiency of the battery cell 20 and improve the uniformity of the surrounding cooling, first heat exchange elements 31 can be provided on both sides of the terminal assembly 27 in the third direction. When the battery device 100 includes at least two battery packs 20A, and these at least two battery packs 20A are arranged side-by-side in the third direction, two first heat exchange elements 31 can be provided between the two adjacent terminal assemblies 27 in two adjacent battery packs 20A.

[0149] Please refer to Figure 5 In one embodiment of this application, the second heat exchanger 33 can be a liquid cooling plate structure so that all the battery cells 20 can be mounted on the upper surface and have a heat exchange connection with all the battery cells 20, so as to simplify the number of the second heat exchanger 33 while providing heat exchange, cooling and temperature equalization for all the battery cells 20.

[0150] Please refer to the reference. Figure 5 and Figure 7 In one embodiment of this application, the third heat exchanger 35 can be a liquid cooling plate structure, and multiple third heat exchangers are arranged side by side at intervals, so that a battery cell 20 is arranged between two adjacent second heat exchangers 33, so that the third heat exchanger 35 itself has a large area and can have heat exchange connection to both sides of the battery cell 20, thereby increasing the heat exchange area and improving the heat exchange and cooling efficiency.

[0151] Please refer to the reference. Figures 5 to 10In one embodiment of this application, the battery device 100 includes a battery cell 20 and a heat exchange mechanism 30. The battery cell 20 has a first end face 24, a second end face 25, and a side peripheral face 26. The first end face 24 is provided with an electrode post 21a. The second end face 25 is disposed opposite to the first end face 24 at a distance. The side peripheral face 26 is connected to the first end face 24 and the second end face 25. The heat exchange mechanism 30 is heat-exchange connected to the battery cell 20. The heat exchange mechanism 30 includes a first heat exchange element 31, a second heat exchange element 33, and a third heat exchange element 35. The first heat exchange element 31 is disposed opposite to the first end face 24, the second heat exchange element 33 is disposed opposite to the second end face 25, and the third heat exchange element 35 is disposed opposite to the side peripheral face 26. The side peripheral face 26 includes two opposite large surfaces 261 and two opposite small surfaces 263. The third heat exchange element 35 is heat-exchange connected to the large surfaces 261. Each of the first heat exchanger 31, the second heat exchanger 33, and the third heat exchanger 35 is provided with a heat exchange flow channel. The first heat exchanger 31 and the third heat exchanger 35 are connected by a heat exchange assembly 36, which has a first connecting port 361 and a second connecting port 363. The second heat exchanger 33 has a third connecting port 331 and a fourth connecting port 333, and the second connecting port 363 is connected to the third connecting port 331. The heat exchange mechanism 30 also includes a connecting pipe 37, a three-way valve 38, and a transfer pipe 39. The connecting pipe 37 connects the second connecting port 363 and the third connecting port 331. The three-way valve 38 is located in the connecting pipe 37, and the transfer pipe 39 is connected to the three-way valve 38. There are at least two third heat exchangers 35, which are arranged at intervals. At least one battery cell 20 is provided between two adjacent third heat exchangers 35, and the first heat exchanger 31 is configured to connect to at least two third heat exchangers 35. The normal direction of the first end face 24 is defined as the first direction, and the arrangement direction of at least two third heat exchangers 35 is defined as the second direction. There are at least two first heat exchangers 31, arranged along a third direction, with the first, second, and third directions intersecting each other. At least some of the heat exchangers are configured to connect to at least two third heat exchangers 35. There are multiple first heat exchangers 31, and the heat exchange assembly 36 also includes two manifolds 311. One manifold 311 connects to one end of a portion of the first heat exchangers 31 in the second direction, and the other manifold 311 connects to one end of another portion of the first heat exchangers 31 in the second direction. One of the two manifolds 311 has a first connecting port 361, and the other has a second connecting port 363.The first heat exchanger 31 has at least two first pairs of connecting pipes 315 on the side facing the third heat exchanger 35. These at least two pairs of connecting pipes 315 are arranged along the arrangement direction of at least two third heat exchangers 35 and are connected to the heat exchange channels within the first heat exchanger 31. The third heat exchanger 35 has a second pair of connecting pipes 351 on the side facing the first heat exchanger 31. These second pairs of connecting pipes 351 are connected to the heat exchange channels within the third heat exchanger 35, and each first pair of connecting pipes 315 is connected to a second pair of connecting pipes 351 of a third heat exchanger 35. The number of battery cells 20 is at least two, and these at least two battery cells 20 are arranged along a second direction. The first end face 24 has two electrode posts 21a along a third direction. The number of first heat exchangers 31 is at least two, each first heat exchanger 31 extending along the second direction, and at least two first heat exchangers 31 are arranged side-by-side along a third direction. At least two battery cells 20 are configured as pole posts 21a facing each other in a second direction to form a pole post assembly 27. In a third direction, a first heat exchanger 31 is located on at least one of the opposite sides of the pole post assembly 27.

[0152] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized in that, include: A battery cell, the battery cell having a first end face, a second end face, and a side peripheral face, the first end face having an electrode post, the second end face being spaced apart from the first end face, and the side peripheral face connecting the first end face and the second end face; and A heat exchange mechanism is provided in a heat exchange connection with the battery cell, and the heat exchange mechanism includes at least two of a first heat exchange element, a second heat exchange element, and a third heat exchange element. The first heat exchanger is disposed opposite to the first end face, the second heat exchanger is disposed opposite to the second end face, and the third heat exchanger is disposed opposite to the side peripheral face; The first end face is also provided with an explosion-proof valve, which is offset from the pole post; The first heat exchanger is provided with a clearance opening, which extends through the side of the first heat exchanger facing the first end face and the side facing away from the first end face. The clearance opening is provided in correspondence with the explosion-proof valve.

2. The battery device as claimed in claim 1, characterized in that, The heat exchange mechanism includes the first heat exchange element, the second heat exchange element, and the third heat exchange element.

3. The battery device as claimed in claim 2, characterized in that, The side peripheral surface includes two opposing large surfaces and two opposing small surfaces, and the third heat exchanger is configured to be heat-exchange connected to the large surfaces.

4. The battery device as claimed in claim 2, characterized in that, The first heat exchanger, the second heat exchanger, and the third heat exchanger are all provided with heat exchange channels.

5. The battery device as claimed in claim 4, characterized in that, At least two of the first heat exchanger, the second heat exchanger, and the third heat exchanger are connected.

6. The battery device as claimed in claim 5, characterized in that, The first heat exchanger and the third heat exchanger are connected to form a heat exchange assembly, and the heat exchange assembly has a first communication port and a second communication port. The second heat exchanger has a third connection port and a fourth connection port, and the second connection port is connected to the third connection port.

7. The battery device as claimed in claim 6, characterized in that, The heat exchange mechanism also includes a connecting pipe, a three-way valve, and a transfer pipe, wherein the connecting pipe connects the second connecting port and the third connecting port; The three-way valve is located on the connecting pipe, and the adapter pipe is connected to the three-way valve.

8. The battery device according to any one of claims 1 to 7, characterized in that, When the heat exchange mechanism includes the first heat exchange element and the third heat exchange element, both the first heat exchange element and the third heat exchange element are provided with heat exchange channels; The first heat exchanger and the third heat exchanger are connected to form a heat exchange assembly, which has a first connection port and a second connection port.

9. The battery device as claimed in claim 8, characterized in that, The number of the third heat exchanger is at least two, and the at least two third heat exchangers are arranged at intervals. At least one of the battery cells is provided between two adjacent third heat exchangers, and the first heat exchanger is configured to connect at least two of the third heat exchangers.

10. The battery device as claimed in claim 9, characterized in that, The normal direction of the first end face is defined as the first direction, and the arrangement direction of at least two of the third heat exchange elements is defined as the second direction; The number of the first heat exchanger is at least two, and the at least two first heat exchangers are arranged along a third direction, with the first direction, the second direction and the third direction intersecting each other; In this configuration, at least a portion of the first heat exchanger is configured to connect to at least two of the third heat exchangers.

11. The battery device as claimed in claim 10, characterized in that, The number of the first heat exchanger is multiple, and the heat exchange assembly also includes two manifolds; One of the flow collectors connects to one end of the first heat exchanger in the second direction, and the other flow collector connects to another end of the first heat exchanger in the second direction; One of the two current collectors is provided with a first connection port, and the other is provided with a second connection port.

12. The battery device as claimed in claim 9, characterized in that, The first heat exchanger has at least two first pairs of connecting pipes on the side facing the third heat exchanger. The at least two first pairs of connecting pipes are arranged along the arrangement direction of at least two of the third heat exchangers and are connected to the heat exchange channel in the first heat exchanger. The third heat exchanger is provided with a second pair of connecting pipes on the side facing the first heat exchanger. The second pair of connecting pipes is connected to the heat exchange flow channel inside the third heat exchanger, and each of the first pair of connecting pipes is connected to the second pair of connecting pipes of the third heat exchanger.

13. The battery device according to any one of claims 1 to 7, characterized in that, The number of battery cells is at least two, and the battery device further includes a busbar, which is electrically connected to the terminal posts of two adjacent battery cells; The first heat exchanger is heat-exchange connected to at least one of the pole and the busbar.

14. The battery device according to any one of claims 1 to 7, characterized in that, The number of the first heat exchanger is at least two, and the at least two first heat exchangers are arranged at intervals, with the interval between at least some of the two adjacent first heat exchangers forming the clearance opening.

15. The battery device as claimed in claim 14, characterized in that, At least two of the first heat exchange elements are arranged along a third direction and both extend along a second direction, which intersects with the third direction.

16. The battery device as claimed in claim 15, characterized in that, The number of battery cells is at least two, and the at least two battery cells are arranged along the second direction and are corresponding to at least one of the first heat exchangers. Each battery cell has two poles on its first end face along the third direction.

17. The battery device as claimed in claim 16, characterized in that, At least two of the battery cells are configured as pole posts facing each other in the second direction to form a pole post assembly, and in the third direction, the first heat exchanger is located on at least one of the opposite sides of the pole post assembly.

18. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 17.

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