Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises single batteries and a heat exchange plate. The heat exchange plate comprises a heat exchange plate body and a protection part. The heat exchange plate main body is configured to exchange heat with a battery monomer, comprises an internal flow channel for circulating a heat exchange medium, and is provided with a first side surface facing the battery monomer and a second side surface deviating from the battery monomer; the protection part is arranged on the second side face of the heat exchange plate body and comprises protruding parts arranged on the two transverse sides of the internal flow channel, and the protruding parts protrude in the direction away from the battery monomers relative to the flow channel outer surface, opposite to the internal flow channel, of the second side face so as to form an avoiding space on the flow channel outer surface. The impact on the internal flow channel of the heat exchange plate when foreign matters impact the battery pack is reduced, the possibility of deformation, blocking and cracking of the internal flow channel of the heat exchange plate is reduced, the temperature regulation capability of the heat exchange plate on the battery monomers is maintained, and the risk of over-temperature work of the battery monomers caused by impact damage of the heat exchange plate is reduced.

Description

TECHNICAL FIELD

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

[0002] In order to make the battery cells of the battery pack work in a reasonable temperature range, a heat exchange plate needs to be arranged to adjust the temperature of the battery cells. When the battery pack is impacted by foreign matter, the heat exchange plate may be damaged by the impact.

[0003] The above statements are only used to provide background technical information related to the present application, and do not necessarily constitute the prior art. SUMMARY

[0004] The purpose of the present application is to provide a battery pack and an electric device, aiming to improve the self-protection ability of the heat exchange plate when impacted.

[0005] The first aspect of the present application provides a battery pack, comprising: a battery cell; and a heat exchange plate, comprising a heat exchange plate body and a protection part, the heat exchange plate body is configured to exchange heat with the battery cell, comprising an internal flow channel for circulating a heat exchange medium, having a first side facing the battery cell and a second side facing away from the battery cell, the protection part is arranged on the second side of the heat exchange plate body, comprising a protruding part arranged on the two sides of the internal flow channel in the transverse direction, the protruding part protrudes in a direction away from the battery cell relative to the flow channel outer surface of the second side opposite to the internal flow channel, so as to form an avoidance space at the flow channel outer surface.

[0006] The term "lateral" here refers to a direction perpendicular to the extension direction of the internal flow channel. A protective portion is provided on the second side of the heat exchanger body away from the battery cell. This protective portion includes protrusions on both sides of the internal flow channel. These protrusions, relative to the second side and opposite to the internal flow channel of the heat exchanger, protrude in a direction away from the battery cell, creating a clearance space on the outer surface of the flow channel. When the part of the battery pack where the heat exchanger is located is impacted by a foreign object, on the one hand, the deformed battery box wall (when the battery pack includes the battery box containing the battery cells and the heat exchanger) or the foreign object itself (when the heat exchanger is directly exposed to the environment) first impacts the protrusions of the protective portion. Thus, the protrusions can protect the deformed battery box wall or the foreign object itself. The protrusion acts as a stop, preventing the deformed box wall or foreign object from moving towards the outer surface of the flow channel. The protrusion is at least partially located on the surface of the second side other than the outer surface of the flow channel, so that even if the protrusion is impacted, the impact on the internal flow channel is small. On the other hand, since a clearance space is provided on the outer surface of the flow channel, even if the deformed box wall or foreign object has an outwardly convex surface protruding towards the heat exchange plate when it impacts the heat exchange plate, the clearance space formed on the outer surface of the flow channel reduces the possibility of the outwardly convex surface contacting the outer surface of the flow channel or reduces the degree of impact on the outer surface of the flow channel. Therefore, the protrusions and clearance spaces of the heat exchange plate can effectively reduce the impact of foreign objects on the internal flow channels of the heat exchange plate when they impact the battery pack. This reduces the possibility of deformation, blockage, and rupture of the internal flow channels of the heat exchange plate, thereby helping to maintain the temperature regulation capability of the heat exchange plate for the battery cells. It also helps to prevent or reduce the risk of battery cells operating at overheating due to impact damage to the heat exchange plate and the risk of battery pack insulation failure due to heat exchange medium leakage caused by impact rupture of the heat exchange plate.

[0007] In some embodiments, the protective portion includes a strip-shaped protrusion arranged laterally on the outer side of the internal flow channel along the extension direction of the internal flow channel; or the protective portion includes a plurality of protrusions arranged at intervals along the extension direction of the internal flow channel on the outer side of the internal flow channel.

[0008] The protective section includes strip-shaped protrusions arranged on the lateral outer side of the internal flow channel along the extension direction of the internal flow channel, which facilitates more comprehensive protection of the internal flow channel.

[0009] The protective section includes multiple protrusions arranged laterally on the outer side of the internal flow channel along the extension direction of the internal flow channel. This helps to reduce the material consumption of the protective section while achieving the protection function for the heat exchange plate body, and to reduce the overall weight of the heat exchange plate and battery pack.

[0010] In some embodiments, the heat exchange plate body comprises a first wall, a second wall spaced apart from the first wall, and a support platform arranged between the first wall and the second wall, the internal flow channel is formed by the support platform separating the space between the first wall and the second wall, and the protection part is arranged at a position of the second wall opposite to the support platform.

[0011] By arranging the support platform to separate the space between the first wall and the second wall to form the internal flow channel, and arranging the protection part at a position of the second wall opposite to the support platform, when the protection part is impacted by a deformed tank wall or a foreign object, the impact force received by the protection part can be at least partially transmitted to the support platform, and the support platform can withstand a stronger impact force, thereby improving the impact resistance and service life of the heat exchange plate.

[0012] In some embodiments, the support platform is integrally formed with the first wall and / or the second wall.

[0013] The support platform is integrally formed with the first wall and / or the second wall, which is conducive to improving the overall performance of the heat exchange plate, and improving the impact resistance and service life of the heat exchange plate.

[0014] In some embodiments, the connection part of the protection part to the second wall is the same as and coincides with the projection of the support platform on the second wall.

[0015] The projection of the protection part on the second wall is the same as and coincides with the projection of the support platform on the second wall, which is conducive to the protection part transmitting all the impact force it receives to the support platform and more evenly transmitting the impact force to the support platform, which is conducive to dispersing the impact force received by the support platform, thereby improving the impact resistance and service life of the heat exchange plate.

[0016] In some embodiments, the protection part and at least a part of the heat exchange plate body are integrally formed of the same material.

[0017] The protection part and at least a part of the heat exchange plate body are integrally formed of the same material, which is conducive to improving the overall performance of the heat exchange plate, thereby improving the impact resistance and service life of the heat exchange plate.

[0018] In some embodiments, the heat exchange plate body comprises a first wall having the first side surface and a second wall spaced apart from the first wall and having the second side surface, wherein the first wall is a rigid wall that is heat-conducting; and / or the second wall is a flexible wall or an elastic wall; and / or the protection part is a flexible protection part or an elastic protection part; and / or the second wall and the protection part are integrally formed of the same material.

[0019] The first wall is a heat-conducting rigid wall, which is conducive to dispersing the local impact force received by the heat exchange plate and reducing the local impact force on the battery monomer due to the impact of foreign objects on the battery pack, on the basis of realizing stable heat exchange between the heat exchange plate and the battery monomer.

[0020] The second wall is a flexible wall or an elastic wall. When the bottom of the heat exchange plate body is impacted, the second plate will elastically deform to absorb and disperse the impact energy, thereby reducing the risk of rupture of the internal flow channel and protecting the internal flow channel and the battery monomer. In addition, if the internal flow channel is deformed or blocked when the heat exchange plate is impacted, the internal flow channel can be partially or completely restored to the original shape after the deformed tank wall at least partially restores the shape or the foreign object leaves the heat exchange plate, thereby facilitating the maintenance of the temperature regulation capability of the heat exchange plate on the battery monomer.

[0021] The protection part is a flexible protection part or an elastic protection part. In addition to stopping the deformed tank wall or the foreign object itself, the protection part will elastically deform when impacted to absorb and disperse the impact energy, thereby buffering the impact force generated by the deformed tank wall or the foreign object itself and reducing the impact degree of the outer surface of the flow channel, further improving the protection capability of the heat exchange plate and the internal flow channel thereof.

[0022] The second wall and the protection part are integrally formed of the same material, which is conducive to improving the overall performance of the heat exchange plate and further improving the protection capability of the heat exchange plate and the internal flow channel thereof.

[0023] In some embodiments, the heat exchange plate body includes a first plate and a second plate, opposite surfaces of the first plate and the second plate are fixedly connected, the internal flow channel is arranged between the first plate and the second plate and is defined by the shape of the first plate and the second plate, and the protection part is arranged on the second plate.

[0024] The heat exchange plate body includes a first plate and a second plate fixedly connected to each other, and the internal flow channel is defined by the first plate and the second plate, which is conducive to reducing the process and difficulty of processing the internal flow channel and reducing the cost.

[0025] In some embodiments, the first plate is a flat plate, the second plate is provided with a groove for forming the internal flow channel, and the protection part and the second plate are integrally formed of the same material.

[0026] The groove for forming the internal flow channel and the protection part are integrally formed on the second plate, and there is no need to arrange a connecting structure for fixedly connecting the heat exchange plate body and the protection part, which is conducive to improving the overall performance of the heat exchange plate, thereby improving the impact resistance and service life of the heat exchange plate.

[0027] In some embodiments, the first plate is a thermally conductive rigid plate; and / or the second plate is a flexible plate or an elastic plate; and / or the protective portion is a flexible protective portion or an elastic protective portion; and / or the protective portion is integrally formed with the second plate using the same material.

[0028] The first plate is a thermally conductive rigid plate, which is conducive to dispersing the local impact force received by the heat exchange plate and reducing the local impact force on the battery cell caused by the impact of foreign objects on the battery pack.

[0029] The second plate is a flexible plate or an elastic plate, which can elastically deform when the bottom of the heat exchange plate body is impacted, thereby absorbing and dispersing the impact energy and reducing the risk of rupture of the internal flow channel, and being conducive to protecting the internal flow channel and the battery cell. In addition, if the internal flow channel is deformed or blocked when the heat exchange plate is impacted, the internal flow channel can partially or completely recover to the original shape after the deformed tank wall at least partially recovers or the foreign object leaves the heat exchange plate, thereby being conducive to maintaining the temperature regulation capability of the heat exchange plate on the battery cell.

[0030] The protective portion is a flexible protective portion or an elastic protective portion, which can elastically deform when impacted, thereby being conducive to buffering the impact force generated by the deformed tank wall or the foreign object itself, absorbing and dispersing the impact energy, and also being conducive to reducing the impact degree of the outer surface of the flow channel, and further improving the protection capability of the heat exchange plate and the internal flow channel thereof.

[0031] When the protective portion and the second plate are integrally made of the same material at the same time, the overall performance of the heat exchange plate can be improved, thereby being conducive to further improving the protection capability of the heat exchange plate and the internal flow channel thereof.

[0032] In some embodiments, the battery pack further includes a battery box, the battery cell and the heat exchange plate are arranged in the battery box, the heat exchange plate is located between the battery cell and the battery box, and the second side faces the battery box.

[0033] The battery pack of the embodiments of the present application can effectively reduce the impact of foreign objects on the internal flow channel of the heat exchange plate when the foreign objects impact the battery pack, reduce the possibility of deformation, blockage and rupture of the internal flow channel of the heat exchange plate, thereby being conducive to maintaining the temperature regulation capability of the heat exchange plate on the battery cell, preventing or reducing the risk of over-temperature operation of the battery cell caused by the damage of the heat exchange plate due to impact, and preventing or reducing the risk of insulation failure of the battery pack caused by the outflow of the heat exchange medium due to the rupture of the heat exchange plate.

[0034] Another aspect of the present application provides a power consuming device comprising the battery pack as described above, wherein the battery pack is configured to provide power to the power consuming device.

[0035] The power consuming device has the advantages of the battery pack as described above.

[0036] Other features and advantages of the present application will be apparent from the following detailed description of exemplary embodiments of the present application, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0037] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the present application and together with the description serve to explain the present application. In the drawings:

[0038] Figure 1 A structural schematic diagram of a power consuming device according to some embodiments of the present application.

[0039] Figure 2 An exploded structural schematic diagram of a battery pack according to some embodiments of the present application.

[0040] Figure 3 A structural schematic diagram of the arrangement of battery cells and heat exchange plates of a battery pack according to some embodiments of the present application.

[0041] Figure 4 A structural schematic diagram of the arrangement of battery cells and heat exchange plates of a battery pack according to some embodiments of the present application. Figure 3 A structural schematic diagram of the arrangement of battery cells and heat exchange plates of a battery pack according to some embodiments of the present application.

[0042] Figure 5 A structural schematic diagram of the arrangement of battery cells and heat exchange plates of a battery pack according to some embodiments of the present application.

[0043] Figures 1 to 5 In the drawings, the same reference numerals in different drawings represent different or same elements.

[0044] D, power consuming device;

[0045] B, battery pack;

[0046] C, avoiding space;

[0047] 1, battery cell;

[0048] 2, heat exchange plate; 21, heat exchange plate body; 211, internal flow channel; 212, first side; 213, second side; 2131, flow channel outer surface; 214, first plate; 2141, first wall; 215, second plate; 2151, second wall; 2152, support table; 22, protection part; 221, protruding part;

[0049] 3, battery box; 31, box body; 32, box cover;

[0050] 4. Foreign matter. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. The following description of at least one exemplary embodiment is merely illustrative in nature and not intended to further limit the scope of the application or its applications or uses. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0052] Unless specifically stated otherwise, the relative arrangements of parts and steps, numerical expressions, and numerical values set forth in the various examples herein are illustrative only. It is to be understood that the herein-described implementations are only examples from among a number of possible implementations based on present technology, and that the scope of the present application is not limited to such examples. Without intent to limit the scope of the application, exemplary methods and their related equipment are described herein as they can be used in some embodiments. It is noted that equivalents for claimed elements can be substituted for said elements and that certain implementation of conventional elements can be used in place of other implementations of said elements. Such equivalents and alternative implementations therefore are intended to fall within the scope of the application. In the description of the example embodiments, any of the terms "comprise", "comprising", "comprises", "include", "including", "includes", "have", "has", "having", or variants thereof are used inclusively and not exclusivity. Such terms are intended to cover and protect the inclusion of one or more elements, integers, components, steps, or combinations thereof, but not the exclusion of any other elements, integers, components, steps, or combinations thereof that can be present or added.

[0053] In the description of the present application, it should be understood that the use of "first", "second", and the like words to describe various elements is merely intended to differentiate one element from another, and the above words do not have special meanings unless otherwise stated. Therefore, the above words cannot be understood as limiting the scope of the present application.

[0054] In the description of the present application, it should be understood that the orientation words such as "transverse, longitudinal, vertical, horizontal", and "top, middle, bottom" and the like indicated orientation or position relationship are generally based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. In the absence of the opposite statement, these orientation words do not indicate and imply that the indicated device or element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of the present application. The orientation words "inner, outer" refer to the inner and outer relative to the contour of the components themselves.

[0055] The technical term "a plurality of" in the present application refers to two or more, such as two, three, etc.

[0056] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0057] In the process of forming the technical solutions of the present application, the inventors have found that in the related art, when the battery pack is impacted by foreign matter, the heat exchange plate may be damaged by the impact, for example, the flow passage cross-sectional area of the internal flow passage of the heat exchange plate becomes smaller or even blocked due to deformation of the heat exchange plate, which weakens the temperature regulation capability of the heat exchange plate for the battery monomer, increases the risk of over-temperature operation of the battery monomer, affects the service life or safety of the battery pack, and in severe cases, may even cause the heat exchange plate to break, and the outflow of the heat exchange medium in the internal flow passage of the heat exchange plate may cause the risk of insulation failure of the battery pack.

[0058] Based on this, the present application provides a battery pack, the heat exchange plate of the battery pack includes a heat exchange plate body and a protection part, the heat exchange plate body includes an internal flow passage, the protection part is arranged on the second side of the heat exchange plate body away from the battery monomer, and includes protruding parts arranged on the transverse two sides of the internal flow passage, the protruding parts protrude in a direction away from the battery monomer relative to the flow passage outer surface of the second side opposite to the internal flow passage to form an avoidance space at the flow passage outer surface.

[0059] By arranging the protection part on the second side of the heat exchange plate body away from the battery monomer, and arranging the avoidance space at the flow passage outer surface of the second side opposite to the internal flow passage due to the protection part including the protruding parts arranged on the transverse two sides of the internal flow passage, when the part of the battery pack where the heat exchange plate is arranged is impacted, the deformed tank wall (when the battery pack includes a battery tank accommodating the battery monomer and the heat exchange plate) or the foreign matter itself (when the heat exchange plate is directly exposed to the environment) caused by the impact of the foreign matter on the battery tank first impacts the protruding parts of the protection part, and the protruding parts are at least partially arranged on the surface outside the flow passage outer surface of the second side, the impact on the internal flow passage of the protruding parts is small, and the deformed tank wall or the foreign matter itself can also reduce the possibility of contacting the flow passage outer surface or reduce the degree of impact on the flow passage outer surface, so that the impact on the internal flow passage of the heat exchange plate when the foreign matter impacts the battery pack can be effectively reduced, the possibility of deformation, blocking and breaking of the internal flow passage of the heat exchange plate can be reduced, which is beneficial to maintaining the temperature regulation capability of the heat exchange plate for the battery monomer, and is also beneficial to preventing or reducing the risk of over-temperature operation of the battery monomer caused by the damage of the heat exchange plate by the impact, and the risk of insulation failure of the battery pack caused by the outflow of the heat exchange medium due to the breaking of the heat exchange plate by the impact.

[0060] Further, the present application also provides a power consumption device including the battery pack.

[0061] The battery pack is configured to provide power to electrical devices. These devices can be, but are not limited to, mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, and power tools. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0062] A battery pack is a single physical module that includes one or more battery cells to provide higher voltage and capacity. A battery pack typically includes a housing for enclosing the one or more battery cells. The housing prevents liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0063] A battery module is a unit comprising multiple individual battery cells, designed to provide higher voltage and capacity. By connecting these cells in parallel or series to form a battery pack, battery modules can meet the power requirements of various applications. Connecting battery cells in series increases the total voltage, while connecting them in parallel increases the total capacity. Battery modules typically also include protective structures to safeguard the multiple battery cells. These protective structures protect the battery pack from damage caused by the external environment.

[0064] A battery cell refers to the smallest unit that makes up a battery. In this application, a battery cell may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., but this application is not limited to these types. A battery cell may be flat, cuboid, or other shapes, but this application is not limited to these shapes either. Battery cells are generally packaged as square battery cells and pouch battery cells, but this application is not limited to these shapes either.

[0065] like Figures 3 to 5 As shown, this application embodiment provides a battery pack B, which includes a battery cell 1 and a heat exchange plate 2. The heat exchange plate 2 includes a heat exchange plate body 21 and a protective portion 22. The heat exchange plate body 21 is configured to exchange heat with the battery cell 1, and includes an internal flow channel 211 for circulating a heat exchange medium, having a first side 212 facing the battery cell 1 and a second side 213 away from the battery cell 1. The protective portion 22 is disposed on the second side 213 of the heat exchange plate body 21, and includes protrusions 221 disposed on both lateral sides of the internal flow channel 211. The protrusions 221 protrude in a direction away from the battery cell 1 relative to the outer surface 2131 of the flow channel on the second side 213, so as to form a clearance space C at the outer surface 2131 of the flow channel.

[0066] The term "lateral" here refers to a direction perpendicular to the extension direction of the internal flow channel 211. A protective portion 22 is provided on the second side 213 of the heat exchange plate body 21 of the heat exchange plate 2, away from the battery cell 1. The protective portion 22 includes protrusions 221 on both lateral sides of the internal flow channel 211. The protrusions 221 protrude away from the battery cell 1 relative to the outer surface 2131 of the flow channel on the second side 213, opposite to the internal flow channel 211 of the heat exchange plate 2, to form a clearance space C at the outer surface 2131 of the flow channel. When the portion of the battery pack B where the heat exchange plate 2 is located is impacted, on the one hand, when the battery box 3 of the battery pack B is deformed due to the impact of a foreign object 4 (when the battery pack B includes the battery box 3 containing the battery cell 1 and the heat exchange plate 2), the deformed box wall (when the battery pack B includes the battery box 3 containing the battery cell 1 and the heat exchange plate 2) or the foreign object 4 itself (when the heat exchange plate 2 is directly exposed to the environment) will first impact the protrusions 221 of the protective portion 22. Thus, the protrusions 221 can protect the deformed box wall or the foreign object. 4 itself forms a stop, preventing the deformed box wall or foreign object 4 itself from moving toward the outer surface 2131 of the flow channel. The protrusion 221 is at least partially provided on the surface of the second side 213 other than the outer surface 2131 of the flow channel, so that even if the protrusion 221 is impacted, the impact on the internal flow channel 211 is small. On the other hand, since the clearance space C is provided at the outer surface 2131 of the flow channel, even if the deformed box wall or foreign object 4 itself has an outward convex surface protruding toward the heat exchange plate 2 when it impacts the heat exchange plate 2, since the clearance space C is formed at the outer surface 2131 of the flow channel, even if the outward convex surface part of the deformed box wall or foreign object 4 itself protruding toward the heat exchange plate 2 when it impacts the heat exchange plate 2 enters the clearance space C, the possibility of the outward convex surface contacting the outer surface 2131 of the flow channel or the degree of impact on the outer surface 2131 of the flow channel can be reduced. Therefore, the protrusion 221 and the clearance space C of the heat exchange plate 2 can effectively reduce the impact of foreign objects 4 on the internal flow channel 211 of the heat exchange plate 2 when impacting the battery pack B, reduce the possibility of deformation, blockage and rupture of the internal flow channel 211 of the heat exchange plate 2, thereby helping to maintain the temperature regulation capability of the heat exchange plate 2 for the battery cell 1, and helping to prevent or reduce the risk of battery cell overheating due to impact damage to the heat exchange plate 2 and the risk of battery pack insulation failure due to heat exchange medium leakage caused by impact rupture of the heat exchange plate 2.

[0067] In some embodiments, such as Figures 3 to 5 As shown, the protective part 22 includes a strip-shaped protrusion 221 arranged on the lateral outer side of the internal flow channel 211 along the extension direction of the internal flow channel 211; or the protective part 22 includes a plurality of protrusions 221 arranged on the lateral outer side of the internal flow channel 211 along the extension direction of the internal flow channel 211.

[0068] The protective part 22 includes a strip-shaped protrusion 221 arranged on the lateral outer side of the internal flow channel 211 along the extension direction of the internal flow channel 211, which is conducive to providing more comprehensive protection for the internal flow channel 211.

[0069] The protection part 22 includes a plurality of protrusions 221 arranged on the lateral outer side of the internal flow channel 211 along the extension direction of the internal flow channel 211, which facilitates reducing the material consumption of the protection part 22 while achieving the protection effect on the heat exchange plate body 21, and reducing the overall weight of the heat exchange plate 2 and the battery pack B.

[0070] In some embodiments, as shown in Figures 3 to 5 The heat exchange plate body 21 includes a first wall 2141, a second wall 2151 arranged in a spaced manner with the first wall 2141, and a support platform 2152 arranged between the first wall 2141 and the second wall 2151, and the internal flow channel 211 is formed by separating the interval between the first wall 2141 and the second wall 2151 through the support platform 2152, and the protection part 22 is arranged at the position of the second wall 2151 opposite to the support platform 2152.

[0071] By arranging the support platform 2152 to separate the interval between the first wall 2141 and the second wall 2151 to form the internal flow channel 211, and arranging the protection part 22 at the position of the second wall 2151 opposite to the support platform 2152, when the protection part 22 is impacted by the deformed tank wall or the foreign matter 4 itself, the impact force received by the protection part 22 can be at least partially transmitted to the support platform 2152, and the support platform 2152 can withstand stronger impact force, thereby improving the impact resistance and service life of the heat exchange plate 2.

[0072] In some embodiments, as shown in Figures 3 to 5 The support platform 2152 is integrally formed with the first wall 2141 and / or the second wall 2151.

[0073] The support platform 2152 is integrally formed with the first wall 2141 and / or the second wall 2151, which facilitates improving the overall performance of the heat exchange plate 2, and improving the impact resistance and service life of the heat exchange plate 2.

[0074] In some embodiments, as shown in Figures 3 to 5 The projection of the connecting part of the protection part 22 on the second wall 2151 is the same as and coincides with the projection of the connecting part of the support platform 2152 on the second wall 2151.

[0075] The projection of the protection part 22 on the second wall 2151 coincides with the projection of the support platform 2152 on the second wall 2151, which facilitates the protection part 22 transmitting all the impact force it receives to the support platform 2152 and facilitating the impact force to be more evenly transmitted to the support platform 2152, facilitating the dispersion of the impact force received by the support platform 2152, thereby facilitating improving the impact resistance and service life of the heat exchange plate 2.

[0076] In some embodiments, as shown in Figures 3 to 5As shown, the protection part 22 is integrally formed with at least part of the heat exchange plate body 21 using the same material.

[0077] The protection part 22 is integrally formed with at least part of the heat exchange plate body 21 using the same material, which is conducive to improving the overall performance of the heat exchange plate 2, thereby improving the impact resistance and service life of the heat exchange plate 2.

[0078] In some embodiments, the heat exchange plate body 21 includes a first wall 2141 having a first side surface 212 and a second wall 2151 spaced apart from the first wall 2141 and having a second side surface 213, wherein the first wall 2141 is a heat-conducting rigid wall; and / or the second wall 2151 is a flexible wall or an elastic wall; and / or the protection part 22 is a flexible protection part or an elastic protection part; and / or the second wall 2151 is integrally formed with the protection part 22 using the same material.

[0079] The first wall 2141 is a heat-conducting rigid wall, which is conducive to dispersing the local impact force on the heat exchange plate 2 by the rigid plate on the basis of realizing stable heat exchange between the heat exchange plate 2 and the battery monomer 1, thereby reducing the local impact force on the battery monomer 1 caused by the impact of the foreign object 4 on the battery pack.

[0080] The second wall 2151 is a flexible wall or an elastic wall, which is conducive to protecting the internal flow channel 211 and the battery monomer when the bottom of the heat exchange plate body 21 is impacted, because the second wall 2151 will elastically deform to absorb and disperse the impact energy, thereby reducing the risk of breaking the internal flow channel 211. In addition, if the internal flow channel 211 is deformed or blocked when the heat exchange plate is impacted, the internal flow channel 211 can partially or completely recover to the original shape after the deformed tank wall at least partially recovers in shape or the foreign object 4 leaves the heat exchange plate, thereby facilitating the maintenance of the temperature regulation capability of the heat exchange plate 2 on the battery monomer.

[0081] The protection part 22 is a flexible protection part or an elastic protection part, which is conducive to reducing the impact degree of the flow channel outer surface 2131 and further improving the protection capability of the heat exchange plate 2 and its internal flow channel 211, because the protection part 22 will elastically deform to absorb and disperse the impact energy when impacted, thereby buffering the impact force generated by the deformed tank wall or the foreign object 4 itself.

[0082] The second wall 2151 is integrally formed with the protection part 22 using the same material, which is conducive to improving the overall performance of the heat exchange plate 2 and further improving the protection capability of the heat exchange plate 2 and its internal flow channel 211.

[0083] In some embodiments, as shown in FIG. 1, the heat exchange plate 2 includes a plurality of heat exchange plate bodies 21 arranged in parallel and connected to each other by a plurality of connecting walls 23. Figures 3 to 5As shown, the heat exchange plate body 21 includes a first plate 214 and a second plate 215, and the opposite surfaces of the first plate 214 and the second plate 215 are fixedly connected. The internal flow channel 211 is arranged between the first plate 214 and the second plate 215 and is defined by the shapes of the first plate 214 and the second plate 215. The protection part 22 is arranged on the second plate 215.

[0084] The heat exchange plate body 21 includes the first plate 214 and the second plate 215 which are fixedly connected to each other, and the internal flow channel 211 is defined by the first plate 214 and the second plate 215, which is conducive to reducing the process and difficulty of processing the internal flow channel 211 and reducing the cost.

[0085] In some embodiments, as shown in Figures 3 to 5 The first plate 214 is a flat plate, the second plate 215 is provided with a groove for forming the internal flow channel 211, and the protection part 22 is integrally formed with the second plate 215 using the same material.

[0086] The groove for forming the internal flow channel 211 and the protection part 22 are integrally formed on the second plate 215, and there is no need to arrange a connecting structure for fixedly connecting the heat exchange plate body 21 and the protection part 22, which is conducive to improving the overall performance of the heat exchange plate 2, thereby improving the impact resistance and service life of the heat exchange plate 2.

[0087] In some embodiments, as shown in Figures 3 to 5 The first plate 214 is a heat-conducting rigid plate; and / or the second plate 215 is a flexible plate or an elastic plate; and / or the protection part 22 is a flexible protection part or an elastic protection part; and / or the protection part 22 is integrally formed with the second plate 215 using the same material.

[0088] The first plate 214 is a heat-conducting rigid plate, which is conducive to dispersing the local impact force received by the heat exchange plate 2 on the basis of realizing stable heat exchange between the heat exchange plate 2 and the battery monomer 1, thereby reducing the local impact force generated on the battery monomer 1 due to the impact of the foreign matter 4 on the battery pack.

[0089] The second plate 215 is a flexible plate or an elastic plate, which will elastically deform when the bottom of the heat exchange plate body 21 is impacted, thereby absorbing and dispersing the impact energy and reducing the risk of breaking the internal flow channel 211, which is conducive to protecting the internal flow channel 211 and the battery monomer 1. In addition, if the internal flow channel 211 is deformed or blocked when the heat exchange plate 2 is impacted, the internal flow channel 211 can be partially or completely restored to the original shape after the deformed tank wall at least partially restores the shape or the foreign matter 4 leaves the heat exchange plate 2, thereby being conducive to maintaining the temperature regulation capability of the heat exchange plate 2 on the battery monomer 1.

[0090] The protective part 22 is a flexible protective part or an elastic protective part. In addition to stopping the deformed box wall or the foreign matter 4 itself, the protective part 22 will elastically deform when impacted, which is beneficial to buffering the impact force generated by the deformed box wall or the foreign matter 4 itself, absorbing and dispersing the impact energy, and also beneficial to reducing the impact degree of the outer surface of the flow channel, further improving the protection capability of the heat exchange plate 2 and the internal flow channel 211 thereof.

[0091] When the protective part 22 and the second plate 215 are integrally made of the same material, the overall performance of the heat exchange plate 2 is improved, thereby further improving the protection capability of the heat exchange plate 2 and the internal flow channel 211 thereof.

[0092] In some embodiments, as shown in Figure 2 The battery pack B further includes a battery box 3. The battery cell 1 and the heat exchange plate 2 are arranged in the battery box 3, the heat exchange plate 2 is located between the battery cell 1 and the battery box 3, and the second side surface 213 faces the battery box 3.

[0093] When the battery box 3 is arranged, the protective part 22 of the heat exchange plate 2 is provided with a protruding part 221, and the avoidance space C is formed at the outer surface 2131 of the flow channel due to the arrangement of the protruding part 221. When the foreign matter 4 impacts the battery pack B, the impact of the foreign matter 4 on the internal flow channel 211 of the heat exchange plate 2 can be effectively reduced, and the possibility of deformation, plugging and rupture of the internal flow channel 211 of the heat exchange plate 2 is reduced, thereby maintaining the temperature regulation capability of the heat exchange plate 2 to the battery cell 1, preventing or reducing the risk of over-temperature operation of the battery cell due to the impact damage of the heat exchange plate 2, and preventing or reducing the risk of insulation failure of the battery pack due to the outflow of the heat exchange medium caused by the rupture of the heat exchange plate 2.

[0094] The application further provides a power utilization device D, as shown in Figure 1 The power utilization device D includes the battery pack B of the application, and the battery pack B is configured to provide power for the power utilization device D.

[0095] The power utilization device D of the application has the advantages of the battery pack B of the application.

[0096] The structure of the battery pack B and the power utilization device D of some embodiments of the application will be described in more detail below. Figures 1 to 5 The structure of the battery pack B and the power utilization device D of some embodiments of the application will be described in more detail below.

[0097] Figure 1 The structure of the battery pack B and the power utilization device D of some embodiments of the application will be described in more detail below. Figure 1As shown, the electrical equipment D is a vehicle. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle is internally provided with a battery pack B, which can be arranged at the bottom, head, or tail of the vehicle. The battery pack B can be used for power supply of the vehicle, for example, as the operating power supply of the vehicle.

[0098] In some embodiments of the present application, the battery pack B can not only be used as the operating power supply of the vehicle, but also as the driving power supply of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0099] Figure 2 A structural schematic diagram of the battery pack B provided in some embodiments of the present application is shown. The battery pack B includes a plurality of battery monomers 1, a heat exchange plate 2, and a battery box 3. The plurality of battery monomers 1 form a battery module. The heat exchange plate 2 is arranged at the bottom of a box body 31 of the battery box 3, the battery module and the plurality of battery monomers 1 constituting the battery module are arranged above the heat exchange plate 2, and the heat exchange plate 2 is configured to exchange heat with the battery monomers 1. The battery monomers 1 can be in direct contact with the heat exchange plate 2 or connected to the heat exchange plate 2 through a heat-conducting adhesive. A box cover 32 is fastened to the box body 31.

[0100] Figure 3 A structural schematic diagram of the arrangement of the heat exchange plate 2 and the battery monomers 1 of the battery pack B provided in some embodiments of the present application is shown.

[0101] The heat exchange plate 2 includes a heat exchange plate body 21 and a protection portion 22. The heat exchange plate body 21 includes an internal flow channel 211 for flowing a heat exchange medium. An upper surface of the heat exchange plate body 21 forms a first side surface 212 thereof facing the battery monomers, and a lower surface thereof forms a second side surface 213 thereof facing away from the battery monomers 1. The protection portion 22 is arranged at the lower surface of the heat exchange plate body 21. The protection portion 22 includes a protruding portion 221 arranged at both sides of the internal flow channel 211 in the transverse direction (corresponding to the left-right direction in the figure). The protruding portion 221 protrudes downward relative to a flow channel outer surface 2131 of the heat exchange plate body 21 opposite the internal flow channel 211 to form an avoiding space C at the flow channel outer surface 2131. As shown in the figure, the protection portion 22 and the internal flow channel 211 are arranged in a staggered manner on the second side surface 213 of the heat exchange plate 2. Figure 3 Figure 3 As shown, the protection portion 22 and the internal flow channel 211 are arranged in a staggered manner on the second side surface 213 of the heat exchange plate 2.

[0102] In the present embodiment, the heat exchange plate body 21 includes a first plate 214 and a second plate 215 arranged oppositely in the up-down direction. The first plate 214 is fixedly connected to the second plate 215. In the present embodiment, the first plate 214 is located above the second plate 215. The lower surface of the first plate 214 and the upper surface of the second plate 215 are opposite and fixedly connected in a gluing manner.

[0103] ​The internal flow channel 211 is provided between the first plate 214 and the second plate 215, and is defined by the shapes of the first plate 214 and the second plate 215. The protection portion 22 is provided below the second plate 215.

[0104] The first plate 214 is a flat plate, which also corresponds to the first wall 2141 of the heat exchange plate body 21.

[0105] The second plate 215 is provided with grooves for forming the internal flow channel 211. The second plate 215 includes a flat plate portion and upwardly provided boss portions, and the grooves are formed between adjacent boss portions. The flat plate portion corresponds to the second wall 2151 of the heat exchange plate body 21, and the boss portions correspond to the support tables 2152 of the heat exchange plate body 21, so that the internal flow channel 211 is formed by the support tables 2152 to divide the space between the first wall 2141 and the second wall 2151.

[0106] In the present embodiment, the protection portion 22 is provided on the flat plate portion of the second plate 215, i.e., on the second wall 2151 opposite to the support table 2152. The connecting position of the protection portion 22 and the second wall 2151 is the same as and coincides with the connecting position of the support table 2152 and the second wall 2151 on the projection of the second wall 2151. As shown in Figure 3 The cross-sectional shape of the support table 2152 and the shape of the protection portion 22 (i.e., the protruding portion 221 in the present embodiment) are both square.

[0107] The first plate 214 is a rigid plate made of a heat-conductive material, such as a metal plate.

[0108] The protection portion 22 and the second plate 215 are integrally formed of the same material. The material of the protection portion 22 and the second plate 215 is an elastic material or a flexible material, so that the protection portion 22 forms an elastic protection portion or a flexible protection portion, and the second plate 215 forms an elastic plate or a flexible plate. For example, the material of the protection portion 22 and the second plate 215 can be rubber.

[0109] As shown in Figure 4As shown, when a foreign object 4 impacts from below the battery pack B, the bottom wall of the box 31 is first impacted, and in severe cases, the box wall bulges upward and deforms, and when the deformation is large, the box wall impacts the heat exchange plate 2 in the process of bulging upward and deforming, and the protruding portion 221 is first impacted, stopping and buffering the continued upward bulging and deformation of the box wall, and at the same time, due to the provision of the avoidance space C, the possibility of contact between the deformed box wall and the flow channel outer surface 2131 of the internal flow channel 211 of the heat exchange plate 2 on the second side surface 213 is reduced, and the degree of impact on the flow channel outer surface 2131 when the deformed box wall contacts the flow channel outer surface 2131 of the heat exchange plate 2 on the second side surface 213 is also reduced, thereby facilitating the reduction of the risk of extrusion deformation or blocking of the internal flow channel 211, and in addition, even if the flow channel outer surface 2131 is impacted and causes the internal flow channel 211 to deform or even block, when the box wall at least partially recovers its shape due to the disappearance of the impact force, the internal flow channel 211 is easy to recover its original shape, thereby maintaining the flow area of the internal flow channel 211 and the temperature regulation capability of the heat exchange plate 2 on the battery monomer. And because the protruding portion 221 is directly opposite the support table 2152 of the second plate 215, the stress of the protruding portion 221 can be transmitted to other parts of the heat exchange plate 2 through the support table 2152, and the impact on the internal flow channel 211 is less, so the internal flow channel 211 is protected by the protection portion 22.

[0110] As shown, Figure 5 In some alternative embodiments, the heat exchange plate 2 can be directly exposed to the environment. When a foreign object 4 impacts the heat exchange plate 2 from below the battery pack B, the protruding portion 221 is first impacted, stopping and buffering the foreign object 4 itself, and at the same time, due to the provision of the avoidance space C, the possibility of contact between the foreign object 4 and the flow channel outer surface 2131 of the internal flow channel 211 of the heat exchange plate 2 on the second side surface 213 is reduced, and the degree of impact on the flow channel outer surface 2131 when the foreign object 4 contacts the flow channel outer surface 2131 of the heat exchange plate 2 on the second side surface 213 is also reduced, thereby facilitating the reduction of the risk of extrusion deformation or blocking of the internal flow channel 211, and in addition, even if the flow channel outer surface 2131 is impacted and causes the internal flow channel 211 to deform or even block, after the foreign object 4 falls, the internal flow channel 211 is easy to recover its original shape, thereby maintaining the flow area of the internal flow channel 211 and the temperature regulation capability of the heat exchange plate 2 on the battery monomer. And because the protruding portion 221 is directly opposite the support table 2152 of the second plate 215, the stress of the protruding portion 221 can be transmitted to other parts of the heat exchange plate 2 through the support table 2152, and the impact on the internal flow channel 211 is less, so the internal flow channel 211 is protected by the protection portion 22.

[0111] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the technical solutions of the present application; although the present application is explained in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent ones, and all of them should be covered in the technical solution range claimed by the present application.

Claims

1. A battery pack (B), characterized in that, include: Battery cell (1); and The heat exchange plate (2) includes a heat exchange plate body (21) and a protective part (22). The heat exchange plate body (21) is configured to exchange heat with the battery cell (1) and includes an internal flow channel (211) for circulating heat exchange medium. It has a first side (212) facing the battery cell (1) and a second side (213) away from the battery cell (1). The protective part (22) is disposed on the second side (213) of the heat exchange plate body (21) and includes protrusions (221) disposed on both sides of the internal flow channel (211). The protrusions (221) protrude away from the battery cell (1) from the outer surface (2131) of the flow channel opposite to the internal flow channel (211) of the second side (213) to form a clearance space (C) at the outer surface (2131) of the flow channel.

2. The battery pack (B) according to claim 1, characterized in that, The protective portion (22) includes a strip-shaped protrusion (221) arranged laterally on the outer side of the internal flow channel (211) along the extending direction of the internal flow channel (211); or The protective part (22) includes a plurality of protrusions (221) arranged at intervals on the lateral outer side of the internal flow channel (211) along the extension direction of the internal flow channel (211).

3. The battery pack (B) according to claim 1, characterized in that, The heat exchange plate body (21) includes a first wall (2141), a second wall (2151) spaced apart from the first wall (2141), and a support platform (2152) disposed between the first wall (2141) and the second wall (2151). The internal flow channel (211) is formed by the support platform (2152) separating the first wall (2141) and the second wall (2151). The protective part (22) is disposed on the second wall (2151) at a position opposite to the support platform (2152).

4. The battery pack (B) according to claim 3, characterized in that, The support platform (2152) is integrally formed with the first wall (2141) and / or the second wall (2151).

5. The battery pack (B) according to claim 3, characterized in that, The projection of the connection part of the protective part (22) to the second wall (2151) on the second wall (2151) is the same as and coincides with the projection of the connection part of the support platform (2152) to the second wall (2151) on the second wall (2151).

6. The battery pack (B) according to claim 1, characterized in that, The protective part (22) and at least a portion of the heat exchange plate body (21) are integrally formed using the same material.

7. The battery pack (B) according to claim 1, characterized in that, The heat exchange plate body (21) includes a first wall (2141) having the first side surface (212) and a second wall (2151) having the second side surface (213) spaced apart from the first wall (2141), wherein, The first wall (2141) is a thermally conductive rigid wall; and / or The second wall (2151) is a flexible wall or an elastic wall; and / or The protective part (22) is a flexible protective part or an elastic protective part; and / or The second wall (2151) and the protective part (22) are integrally formed using the same material.

8. The battery pack (B) according to claim 1, characterized in that, The heat exchange plate body (21) includes a first plate (214) and a second plate (215). The surfaces of the first plate (214) and the second plate (215) are fixedly connected. The internal flow channel (211) is disposed between the first plate (214) and the second plate (215) and is defined by the shapes of the first plate (214) and the second plate (215). The protective part (22) is disposed on the second plate (215).

9. The battery pack (B) according to claim 8, characterized in that, The first plate (214) is a flat plate, and the second plate (215) is provided with grooves for forming the internal flow channel (211). The protective part (22) and the second plate (215) are integrally formed using the same material.

10. The battery pack (B) according to claim 8, characterized in that, The first plate (214) is a thermally conductive rigid plate; and / or The second plate (215) is a flexible plate or an elastic plate; and / or The protective part (22) is a flexible protective part or an elastic protective part; and / or The protective part (22) and the second plate (215) are integrally formed using the same material.

11. The battery pack (B) according to any one of claims 1 to 10, characterized in that, It also includes a battery box (3), in which the battery cell (1) and the heat exchange plate (2) are disposed. The heat exchange plate (2) is located between the battery cell (1) and the battery box (3), and the second side (213) faces the battery box (3).

12. An electrical appliance (D), characterized in that, The battery pack (B) includes any one of claims 1 to 11, the battery pack (B) being configured to provide power to the electrical equipment (D).

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