Battery liquid cooling structure, battery box body and battery pack

Abstract

The utility model relates to a battery liquid cooling structure, a battery box body and a battery pack, in the battery liquid cooling structure, a bottom plate and a side plate group are enclosed to form an accommodating cavity, and the accommodating cavity is used for accommodating a battery pack; the side plate group comprises at least one cooling side plate; the bottom plate is communicated with the cooling side plate which is connected with the corresponding side surface of the battery pack so as to perform heat exchange on the corresponding side surface of the battery pack; the bottom plate is connected with the bottom surface of the battery to exchange heat of the bottom surface of the battery pack, so that the bottom surface and the side surface of the battery pack are cooled, and the cooling area of the battery pack is increased. By arranging the bottom plate with a cooling effect, arranging at least one cooling side plate on the side plate group, and communicating the cooling side plates based on the bottom plate, the cooling liquid can simultaneously circulate on the bottom plate and the side plates respectively, so that the bottom surface and the side surfaces of the battery pack are simultaneously cooled and radiated, and the contact heat conduction area of the battery pack is increased; the temperature of the battery pack can be effectively adjusted, and the performance and the service life of the battery pack are effectively protected.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery liquid cooling structure, a battery box, and a battery pack. Background Art

[0002] A battery pack refers to a whole formed by packaging a battery module, a battery management system (BMS) and other necessary electrical components in a protective container. The battery module is composed of several single cells connected in series and / or parallel. The battery module will generate heat during operation. If it cannot be dissipated in time, it will easily cause the temperature inside the battery pack to rise rapidly.

[0003] In the prior art, a cooling channel is usually provided at the bottom of the battery pack, and the cooling medium in the channel exchanges heat with the bottom of the single cell to regulate the temperature of each single cell in the battery pack. However, this cooling method and the cooling area of ​​the single cell are small, and the cooling effect is not obvious, resulting in the temperature in the battery pack still being relatively high, affecting the performance and service life of the battery pack. Utility Model Content

[0004] Based on this, a battery liquid cooling structure, a battery box and a battery pack are provided.

[0005] In a first aspect, the present application provides a battery liquid cooling structure, comprising:

[0006] A side plate group, the side plate group including at least one cooling side plate;

[0007] The bottom plate, the bottom plate and the side plate group enclose a receiving cavity, which is used to accommodate the battery pack; the bottom plate is connected to the cooling side plate, and the cooling side plate is used to connect the corresponding side surfaces of the battery pack to exchange heat with the corresponding side surfaces of the battery pack; the bottom plate is used to connect the bottom surface of the battery to exchange heat with the bottom surface of the battery pack.

[0008] In one embodiment, the side plate group includes a first cooling side plate and a second cooling side plate, the first cooling side plate and the second cooling side plate are arranged opposite to each other; the first cooling side plate and the second cooling side plate are connected, and the first cooling side plate is connected to the bottom plate; the battery pack has a first side surface and a second side surface that are arranged opposite to each other and have a larger area;

[0009] The first cooling side plate is used to fit the first side of the battery pack, and the second cooling side plate is used to fit the second side of the battery pack.

[0010] In one embodiment, the side plate group further includes a first connecting side plate, the first connecting side plate being adjacent to the first cooling side plate; the first connecting side plate being isolated from the third side surface of the battery pack;

[0011] The first connecting side plate is communicated between the bottom plate and the first cooling side plate; the first connecting side plate is communicated between the bottom plate and the second cooling side plate.

[0012] In one embodiment, the first connecting side panel is provided with a first side panel sub-channel and a second side panel sub-channel;

[0013] The first end of the first side plate sub-channel is connected to the first end of the second side plate sub-channel; the second end of the first side plate sub-channel is connected to the first cooling side plate, and the second end of the second side plate sub-channel is connected to the bottom plate.

[0014] In one embodiment, the first connecting side plate is further provided with a third side plate sub-channel;

[0015] The third side plate sub-channel is communicated between the bottom plate and the second cooling side plate.

[0016] In one embodiment, the bottom plate is provided with a first bottom plate sub-channel and a second bottom plate sub-channel;

[0017] The first end of the first bottom plate sub-channel is connected to the first connecting side plate, the second end of the first bottom plate sub-channel is connected to the second end of the second bottom plate sub-channel, and the first end of the second bottom plate sub-channel is connected to the first connecting side plate.

[0018] In one embodiment, at least one flow guide is provided between the second end of the first bottom plate sub-channel and the second end of the second bottom plate sub-channel.

[0019] In one embodiment, a first channel is provided in the first cooling side plate, and the first channel is provided with at least one first partition to divide the first channel into at least two fourth side plate sub-channels;

[0020] Each fourth side plate sub-channel is respectively communicated between the bottom plate and the second cooling side plate.

[0021] In one embodiment, a second channel is provided in the second cooling side plate, and the second channel is provided with at least one second partition to divide the second channel into at least two fifth side plate sub-channels;

[0022] Each fifth side plate sub-channel is connected to the first cooling side plate.

[0023] In one embodiment, the side plate assembly further includes a second connecting side plate, the second connecting side plate being opposite to the first connecting side plate; the second connecting side plate being isolated from the fourth side surface of the battery pack;

[0024] The second connecting side plate is in communication between the first cooling side plate and the second cooling side plate.

[0025] In one embodiment, the first connecting side plate is provided with a first interface, and the first interface is respectively connected to the first end of the first side plate sub-channel and the first end of the second side plate sub-channel;

[0026] And / or, the first cooling side plate is provided with a second interface, and the second interface is connected to the bottom plate and the second cooling side plate respectively.

[0027] In one embodiment, a first adhesive member is provided between the bottom plate and the bottom surface of the battery pack;

[0028] And / or, a second adhesive member is provided between the cooling side plate and the corresponding side surface of the battery pack.

[0029] In a second aspect, the present application also provides a battery case comprising a battery liquid cooling structure as described above.

[0030] In a third aspect, the present application also provides a battery pack, comprising a battery pack and a battery box as described above; the battery pack is disposed in the battery box.

[0031] One of the above technical solutions has the following advantages and beneficial effects:

[0032] The above-mentioned battery liquid cooling structure includes a side plate group and a bottom plate. The bottom plate and the side plate group enclose a receiving cavity for receiving the battery pack; the side plate group includes at least one cooling side plate; the bottom plate is connected to the cooling side plate, and the cooling side plate is connected to the corresponding side of the battery pack to exchange heat with the corresponding side of the battery pack; the bottom plate is connected to the bottom surface of the battery to exchange heat with the bottom surface of the battery pack, thereby cooling and dissipating the bottom and side surfaces of the battery pack, and increasing the cooling area of ​​the battery pack. The present application provides a bottom plate with a cooling function and provides at least one cooling side plate in the side plate group. Based on the connection between the bottom plate and the cooling side plate, the coolant can circulate in the bottom plate and the side plate respectively, thereby cooling and dissipating the bottom and side surfaces of the battery pack at the same time, increasing the contact heat conduction area of ​​the battery pack, improving the heat exchange efficiency, effectively regulating the temperature of the battery pack, and effectively protecting the performance and service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of the battery liquid cooling structure in an embodiment of the present application;

[0034] Figure 2 This is a partial structural diagram from a first perspective of the battery liquid cooling structure in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the partial structure of the battery liquid cooling structure according to an embodiment of the present application from a second perspective;

[0036] Figure 4 This is a partial structural diagram from a third perspective of the battery liquid cooling structure in an embodiment of the present application;

[0037] Figure 5 This is a schematic diagram of the first cross-sectional structure of the battery liquid cooling structure in an embodiment of the present application;

[0038] Figure 6 This is a schematic diagram of a second cross-sectional structure of the battery liquid cooling structure in an embodiment of the present application;

[0039] Figure 7 This is a schematic diagram of the third cross-sectional structure of the battery liquid cooling structure in the embodiment of the present application;

[0040] Figure 8 This is a schematic diagram of the fourth cross-sectional structure of the battery liquid cooling structure in the embodiment of the present application;

[0041] Figure 9 This is a fifth cross-sectional structural diagram of the battery liquid cooling structure in an embodiment of the present application;

[0042] Figure 10 Schematic diagram of the fluid structure of the battery liquid cooling structure in an embodiment of the present application.

[0043] Reference numerals:

[0044] 10. Side plate group; 110. First cooling side plate; 112. First channel; 1122. Fourth side plate sub-channel; 120. Second cooling side plate; 122. Second channel; 1222. Fifth side plate sub-channel; 130. First connecting side plate; 132. First side plate sub-channel; 134. Second side plate sub-channel; 136. Third side plate sub-channel; 140. Second connecting side plate; 20. Bottom plate; 210. First bottom plate sub-channel; 220. Second bottom plate sub-channel; 30. Accommodating chamber; 410. First isolating member; 420. Second isolating member; 510. First interface; 520. Second interface; 60. Flow guide. DETAILED DESCRIPTION

[0045] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0046] It should be noted that the terms "first," "second," and the like in the specification and claims of the present application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numerals used in this manner are interchangeable where appropriate for the embodiments of the present application described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover inclusions that are not listed. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products, or apparatus.

[0047] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inner," "outer," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having a specific orientation, or to being constructed or operated in a specific orientation.

[0048] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0049] Additionally, the term "plurality" shall mean two or more.

[0050] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0051] In one embodiment, Figure 1 and Figure 4 As shown, a battery liquid cooling structure is provided, including a side plate group 10 and a bottom plate 20, the side plate group 10 includes at least one cooling side plate; the bottom plate 20 and the side plate group 10 enclose a receiving cavity 30, and the receiving cavity 30 is used to receive the battery pack; the bottom plate 20 is connected to the cooling side plate, and the cooling side plate is used to connect the corresponding side surfaces of the battery pack to exchange heat with the corresponding side surfaces of the battery pack; the bottom plate 20 is used to connect the bottom surface of the battery to exchange heat with the bottom surface of the battery pack.

[0052] The battery pack may include a plurality of single cells, each of which may be connected in series and / or in parallel, and each of which may be arranged in a queue so that the battery pack as a whole has a square structure. The single cell may be a lithium-ion cell, for example, a lithium iron phosphate cell, a ternary cell, or a lithium iron manganese cell. In another example, the battery pack may also be composed of a single single cell. The single cell may have a regular shape such as a square or a circle. It should be noted that the single cell may also have an irregular shape.

[0053] The side panel assembly 10 may be composed of several side panels. For example, the side panel assembly 10 may include four side panels, which together form a square structure. The side panel assembly 10 may include at least one cooling side panel. For example, the side panel assembly 10 is a square-shaped side panel assembly 10, and the four side panels of the side panel assembly 10 are a front side panel, a rear side panel, a left side panel, and a rear side panel. In one example, the front side panel, the rear side panel, the left side panel, or the rear side panel is a cooling side panel; in another example, the front side panel, the rear side panel, the left side panel, and the rear side panel are all cooling side panels. The cooling side panels are provided with side panel channels that can be used to transmit coolant. It should be noted that the coolant can be water or a water mixture. The cooling side panels can be tightly connected to the corresponding side of the battery pack by bonding or pressing. When the cooling side panels are positioned against the corresponding side of the battery pack, when coolant is transmitted through the side panel channels of the cooling side panels, the coolant can exchange heat with the corresponding side of the battery pack, thereby achieving cooling and heat dissipation of the corresponding side of the battery pack.

[0054] The bottom plate 20 may be a flat plate structure, and the side plate group 10 is arranged on the bottom plate 20. For example, the bottom plate 20 and the side plate group 10 may be an integrally formed structure; in another example, the side plate group 10 may also be arranged on the bottom plate 20 by screwing or welding. The bottom plate 20 and the side plate group 10 enclose a receiving cavity 30, and the battery pack can be arranged in the receiving cavity 30 so that the bottom surface of the battery pack fits the bottom plate 20 and the corresponding side surface of the battery pack fits the corresponding cooling side plate of the side plate group 10. For example, the bottom plate 20 and the bottom surface of the battery pack can be tightly connected by bonding or pressing. A bottom plate 20 channel is provided in the bottom plate 20, and the bottom plate 20 channel can be used to transmit coolant. When coolant is transmitted in the bottom plate 20 channel of the bottom plate 20, the coolant can exchange heat with the bottom plate 20 of the battery pack, thereby achieving cooling and heat dissipation of the bottom plate 20 of the battery pack.

[0055] Based on the bottom plate 20 being connected to the cooling side plates, for example, the bottom plate 20 and the cooling side plates can be connected in series, so that the coolant can be first transmitted from the cooling side plates, and then the coolant enters the bottom plate 20 for transmission, thereby realizing cooling and heat dissipation of the corresponding side surfaces and bottom surfaces of the battery pack, which can effectively regulate the temperature of the battery pack and increase the cooling and heat dissipation area of ​​the battery pack; for another example, the bottom plate 20 and the cooling side plates can be connected in parallel, so that the coolant can be transmitted from the cooling side plates and the bottom plate 20 at the same time, shortening the transmission path of the coolant, thereby further improving the cooling and heat dissipation efficiency of the corresponding side surfaces and bottom surfaces of the battery pack.

[0056] In the above-mentioned embodiment, the side plate group 10 includes at least one cooling side plate, and the bottom plate 20 and the side plate group 10 enclose a housing cavity 30, which is used to accommodate the battery pack; the bottom plate 20 is connected to the cooling side plate, and the cooling side plate is connected to the corresponding side of the battery pack to exchange heat with the corresponding side of the battery pack; the bottom plate 20 is connected to the bottom surface of the battery to exchange heat with the bottom surface of the battery pack, thereby cooling and dissipating the bottom and side surfaces of the battery pack, and increasing the cooling area of ​​the battery pack. The present application provides a bottom plate 20 with a cooling function, and provides at least one cooling side plate on the side plate group 10. Based on the bottom plate 20 being connected to the cooling side plate, the coolant can circulate simultaneously in the bottom plate 20 and the side plate, thereby cooling and dissipating the bottom and side surfaces of the battery pack at the same time, increasing the contact heat conduction area of ​​the battery pack, improving the heat exchange efficiency, effectively regulating the temperature of the battery pack, and effectively protecting the performance and service life of the battery pack.

[0057] In one embodiment, Figure 1 、 Figure 6 and Figure 7 As shown, the side plate group 10 includes a first cooling side plate 110 and a second cooling side plate 120, and the first cooling side plate 110 and the second cooling side plate 120 are arranged opposite to each other; the first cooling side plate 110 is connected to the second cooling side plate 120, and the first cooling side plate 110 is connected to the bottom plate 20; the battery pack has a first side surface and a second side surface that are arranged opposite to each other and have a larger area; the first cooling side plate 110 is used to fit the first side surface of the battery pack, and the second cooling side plate 120 is used to fit the second side surface of the battery pack.

[0058] The first cooling side plate 110 and the second cooling side plate 120 can be flat-plate structures. For example, the side plate assembly 10 can include four side plates, which together form a square-shaped side plate assembly 10. The two side plates with larger areas are configured as the first cooling side plate 110 and the second cooling side plate 120, with the first cooling side plate 110 and the second cooling side plate 120 positioned opposite each other. It should be noted that the first cooling side plate 110 and the second cooling side plate 120 can be an integrally formed structure; in another example, the first cooling side plate 110 and the second cooling side plate 120 can be connected by welding or screwing.

[0059] The first and second sides of the battery pack are larger in area. The first side of the battery pack is arranged opposite the second side. The first side of the battery pack includes the first side of each single cell, and the second side of the battery pack includes the second side of each single cell. The first cooling side plate 110 is arranged in contact with the first side of the battery pack, so that the first cooling side plate 110 can exchange heat with the first side of the battery pack, thereby cooling and dissipating heat from the first side of the battery pack; the second cooling side plate 120 is arranged in contact with the second side of the battery pack, so that the second cooling side plate 120 can exchange heat with the second side of the battery pack, thereby cooling and dissipating heat from the second side of the battery pack. This allows the first and second sides of each single cell to be cooled and dissipated simultaneously, increasing the cooling and dissipation area of ​​each single cell in the battery pack and improving the uniformity of cooling and dissipation of heat from each single cell in the battery pack.

[0060] Exemplarily, a first channel 112 is provided in the first cooling side plate 110, and the first channel 112 is used to transmit coolant. When coolant is transmitted in the first channel 112 of the first cooling side plate 110, the coolant can exchange heat with the first side of the battery pack, thereby cooling and dissipating heat to the first side of the battery pack. A second channel 122 is provided in the second cooling side plate 120, and the second channel 122 is used to transmit coolant. When coolant is transmitted in the second channel 122 of the second cooling side plate 120, the coolant can exchange heat with the second side of the battery pack, thereby cooling and dissipating heat to the second side of the battery pack. It should be noted that in order to facilitate the processing and forming of the first channel 112 in the first cooling side plate 110, a first window and a first panel can be provided on one side of the first cooling side plate 110. After the first channel 112 is processed and formed, the first panel is installed on the first window of the first cooling side plate 110 to seal the first window. Similarly, in order to facilitate the processing and forming of the second channel 122 in the second cooling side plate 120, a second window and a second panel can be set on one side of the second cooling side plate 120. After the second channel 122 is processed and formed, the second panel is installed on the second window of the second cooling side plate 120 to seal the second window.

[0061] Because the first cooling side plate 110 is connected to the second cooling side plate 120, and the first cooling side plate 110 is connected to the bottom plate 20, the coolant can be simultaneously transmitted from the first cooling side plate 110 to the second cooling side plate 120 and the bottom plate 20, thereby cooling and dissipating the corresponding two side surfaces and the bottom surface of the battery pack, which can effectively regulate the temperature of the battery pack and further increase the cooling and heat dissipation area of ​​the battery pack. At the same time, it is easy to adjust the flow rate of the coolant, with few adjustment variables. Only the temperature and flow rate of the coolant inlet need to be adjusted, which improves the adjustment efficiency of the coolant, can effectively regulate the temperature of the battery pack, and effectively protect the performance and service life of the battery pack.

[0062] In one embodiment, Figure 1 As shown, the side plate group 10 also includes a first connecting side plate 130, which is adjacent to the first cooling side plate 110; the first connecting side plate 130 is isolated from the third side of the battery pack; the first connecting side plate 130 is connected between the bottom plate 20 and the first cooling side plate 110; the first connecting side plate 130 is connected between the bottom plate 20 and the second cooling side plate 120.

[0063] The third side of the battery pack is a smaller side and is adjacent to the first side. The third side of the battery pack and the first connecting side plate 130 can be isolated by an end plate or a partition to prevent localized cooling of the individual cells on the third side of the battery pack, which could lead to uneven temperatures among the individual cells in the battery pack.

[0064] The first connecting side plate 130 can be a flat plate-shaped structure. For example, the side plate group 10 can include four side plates, and the four side plates enclose the side plate group 10 to form a square structure. Any three side plates can be set as the first cooling side plate 110, the second cooling side plate 120, and the first connecting side plate 130. That is, the first connecting side plate 130 is adjacent to the first cooling side plate 110, the first connecting side plate 130 is adjacent to the second cooling side plate 120, and the first cooling side plate 110 and the second cooling side plate 120 are arranged opposite each other. It should be noted that the first cooling side plate 110, the second cooling side plate 120, and the first connecting side plate 130 can be an integrally formed structure; in another example, the first cooling side plate 110, the second cooling side plate 120, and the first connecting side plate 130 can also be connected by welding or screwing.

[0065] The coolant input and output ports can be set on the first connecting side plate 130. The first connecting cooling side plate can be provided with a diverter channel and a return channel. The diverter channel is used to divert the input coolant and transmit it to the base plate 20 and the first cooling side plate 110; the return channel is used to collect and output the coolant returning from the base plate 20 and the second cooling side plate 120. It should be noted that to facilitate the processing and forming of the diverter channel and the return channel in the first connecting side plate 130, a third window and a third panel can be provided on one side of the first connecting side plate 130. After the diverter channel and the return channel are processed and formed, the third panel is installed on the third window of the first connecting side plate 130 to seal the third window.

[0066] Based on the first connecting side plate 130 being connected between the bottom plate 20 and the first cooling side plate 110, and the first connecting side plate 130 being connected between the bottom plate 20 and the second cooling side plate 120, the coolant can enter from the first connecting side plate 130, and after being transmitted through the first connecting side plate 130, enter the first cooling side plate 110 and the bottom plate 20 for transmission. The coolant entering the first cooling side plate 110 is transmitted to the second cooling side plate 120, and the coolant entering the bottom plate 20 is returned to the first connecting side plate 130, and then the coolant of the second cooling side plate 120 is returned to the first connecting side plate 130. A connecting side plate 130 is connected, and the transferred coolant is output from the first connecting side plate 130, thereby cooling and dissipating the corresponding two side surfaces and bottom surface of the battery pack, which can effectively adjust the temperature of the battery pack, greatly increase the cooling and dissipation area of ​​the battery pack, and improve the heat exchange efficiency of the battery pack. At the same time, it is only necessary to adjust the temperature and flow of the water inlet of the first connecting side plate 130 to adjust the temperature and flow of each channel, thereby improving the convenience of adjusting the flow and temperature of the coolant, improving the adjustment efficiency of the coolant, and effectively protecting the performance and service life of the battery pack.

[0067] In one embodiment, Figure 5 and Figure 10 As shown, the first connecting side plate 130 is provided with a first side plate sub-channel 132 and a second side plate sub-channel 134; the first end of the first side plate sub-channel 132 is connected to the first end of the second side plate sub-channel 134; the second end of the first side plate sub-channel 132 is connected to the first cooling side plate 110, and the second end of the second side plate sub-channel 134 is connected to the bottom plate 20.

[0068] Among them, the first end of the first side plate sub-channel 132 can be a liquid inlet end, and the first end of the second side plate sub-channel 134 can be a liquid inlet end. Based on the communication between the first end of the first side plate channel 132 and the first end of the second side plate channel 134, the coolant can simultaneously enter the first end of the first side plate channel 132 and the first end of the second side plate channel 134. After the coolant enters the first side plate channel 132, it is transmitted and enters the first cooling side plate 110 through the second end of the first side plate channel 132, so that the first cooling side plate 110 can cool and dissipate heat to the corresponding side surface of the battery pack; after the coolant enters the second side plate channel 134, it is transmitted and enters the bottom plate 20 through the second end of the second side plate channel 134, so that the bottom plate 20 can cool and dissipate heat to the lower surface of the battery pack, that is, cooling and dissipating the corresponding side surfaces and bottom surfaces of the battery pack is achieved, which can effectively regulate the temperature of the battery pack, increase the cooling and heat dissipation area of ​​the battery pack, improve the heat exchange efficiency of the battery pack, and effectively protect the performance and service life of the battery pack.

[0069] In one embodiment, Figure 5 and Figure 10As shown, the first connecting side plate 130 is further provided with a third side plate sub-channel 136 ; the third side plate sub-channel 136 is communicated between the bottom plate 20 and the second cooling side plate 120 .

[0070] The third side plate sub-channel 136 can be used to output coolant. For example, the first end of the third side plate sub-channel 136 is connected to the second cooling side plate 120, and the second end of the third side plate sub-channel 136 is connected to the bottom plate 20. The first end of the third side plate sub-channel 136 can be set as a liquid outlet.

[0071] For example, the coolant enters the first side plate sub-channel 132 and the second side plate sub-channel 134 at the same time for transmission. The coolant entering the first side plate sub-channel 132 is transmitted in sequence through the first side plate sub-channel 132, the first cooling side plate 110 and the second cooling side plate 120. The coolant of the second cooling side plate 120 is returned to the third side plate sub-channel 136 and output from the third side plate sub-channel 136. The coolant entering the second side plate channel 134 is transmitted in sequence through the second side plate channel 134 and the bottom plate 20. The coolant of the bottom plate 20 is returned to the third side plate sub-channel 136 and output from the third side plate channel 136, realizing the circulation transmission of the coolant. Then, the first cooling side plate 110 and the second cooling side plate 120 can cool and dissipate heat on the corresponding sides of the battery pack respectively, and the bottom plate 20 can cool and dissipate heat on the bottom surface of the battery pack, thereby effectively regulating the temperature of the battery pack, increasing the cooling and heat dissipation area of ​​the battery pack, improving the heat exchange efficiency of the battery pack, and effectively protecting the performance and service life of the battery pack.

[0072] In one embodiment, Figure 4 and Figure 9 As shown, the bottom plate 20 is provided with a first bottom plate sub-channel 210 and a second bottom plate sub-channel 220; the first end of the first bottom plate sub-channel 210 is connected to the first connecting side plate 130, the second end of the first bottom plate sub-channel 210 is connected to the second end of the second bottom plate sub-channel 220, and the first end of the second bottom plate sub-channel 220 is connected to the first connecting side plate 130.

[0073] Among them, the first bottom plate sub-channel 210 and the second bottom plate sub-channel 220 can be arranged in parallel, and an arc transition is set between the first end of the first bottom plate sub-channel 210 and the second end of the second side plate sub-channel 134, so that the first bottom plate sub-channel 210 and the second bottom plate sub-channel 220 are connected in series.

[0074] For example, the coolant enters the second side plate sub-channel 134 and is transmitted in sequence through the second side plate sub-channel 134, the first bottom plate sub-channel 210 and the second bottom plate sub-channel 220. The coolant in the second bottom plate sub-channel 220 is returned to the third side plate sub-channel 136 and output from the third side plate sub-channel 136, thereby realizing the circulation transmission of the coolant. Then, the bottom plate 20 can cool and dissipate heat for the bottom plate 20 of the battery pack respectively, thereby effectively regulating the temperature of the battery pack. By arranging the first bottom plate sub-channel 210 and the second bottom plate sub-channel 220 on the bottom plate 20, the contact area between the bottom plate 20 and the coolant is increased, thereby increasing the cooling and heat dissipation area of ​​the bottom surface of the battery pack by the bottom plate 20.

[0075] In one embodiment, Figure 4 and Figure 9 As shown, at least one flow guide 60 is provided between the second end of the first bottom plate sub-channel 210 and the second end of the second bottom plate sub-channel 220 .

[0076] The guide member 60 and the bottom plate 20 may be an integrally formed structure, and the guide member 60 may be an arc-shaped structure.

[0077] For example, the guide 60 is disposed adjacent to the second end of the first floor sub-channel 210 and the second end of the second floor sub-channel 220. The guide 60 is used to direct the coolant from the first floor sub-channel 210 to the second floor sub-channel 220 to reduce coolant transmission resistance. For example, the first floor sub-channel 210 and the second floor sub-channel 220 may be disposed in parallel, with a circular arc transition between the first end of the first floor sub-channel 210 and the second end of the second side plate sub-channel 134. In other words, the guide 60 may be disposed in the circular arc transition section.

[0078] In one embodiment, Figure 2 and Figure 6 As shown, a first channel 112 is provided in the first cooling side plate 110, and the first channel 112 is provided with at least one first isolation member 410 to divide the first channel 112 into at least two fourth side plate sub-channels 1122; each fourth side plate sub-channel 1122 is respectively connected between the bottom plate 20 and the second cooling side plate 120.

[0079] The first channel 112 is used to transmit coolant. When coolant is transmitted through the first channel 112 of the first cooling side plate 110, the coolant can exchange heat with the first side surface of the battery pack, thereby cooling and dissipating heat from the first side surface of the battery pack. The first isolation member 410 and the first cooling side plate 110 can be integrally formed, and the first isolation member 410 can be in an elongated strip shape.

[0080] For example, a first isolation member 410 is provided in the first channel 112, which further divides the first channel 112 into two fourth side plate sub-channels 1122. The two fourth side plate sub-channels 1122 are connected in parallel, and the coolant can enter the two fourth side plate sub-channels 1122 for transmission at the same time, so that the coolant can fully contact the internal space of the first channel 112, avoiding the upper part of the first channel 112 being unable to fully contact the coolant due to the gravity principle of the coolant, thereby increasing the contact area between the first cooling side plate 110 and the coolant, thereby increasing the cooling and heat dissipation area of ​​the first cooling side plate 110 on the corresponding side of the battery pack, and improving the heat exchange efficiency of the battery pack.

[0081] Since each fourth side plate sub-channel 1122 is respectively connected between the bottom plate 20 and the second cooling side plate 120, the coolant can be simultaneously transmitted from each fourth side plate sub-channel 1122 to the second cooling side plate 120 and the bottom plate 20, thereby cooling and dissipating the corresponding two side surfaces and the bottom surface of the battery pack, which can effectively regulate the temperature of the battery pack, improve the regulation efficiency of the coolant, and effectively protect the performance and service life of the battery pack.

[0082] In one embodiment, Figure 3 and Figure 7 As shown, a second channel 122 is provided in the second cooling side plate 120 , and the second channel 122 is provided with at least one second isolation member 420 to divide the second channel 122 into at least two fifth side plate sub-channels 1222 ; each fifth side plate sub-channel 1222 is connected to the first cooling side plate 110 .

[0083] The second channel 122 is used to transmit coolant. When coolant is transmitted through the second channel 122 of the second cooling side plate 120, the coolant can exchange heat with the second side surface of the battery pack, thereby cooling and dissipating heat from the second side surface of the battery pack. The second isolation member 420 and the second cooling side plate 120 can be integrally formed, and the second isolation member 420 can be in an elongated strip shape.

[0084] For example, a second isolation member 420 is provided in the second channel 122, thereby dividing the second channel 122 into two fifth side plate sub-channels 1222. The two fifth side plate sub-channels 1222 are connected in parallel, and the coolant can enter the two fifth side plate sub-channels 1222 for transmission at the same time, so that the coolant can fully contact the internal space of the second channel 122, avoiding the upper part of the second channel 122 being unable to fully contact the coolant due to the gravity principle of the coolant, increasing the contact area between the second cooling side plate 120 and the coolant, thereby increasing the cooling and heat dissipation area of ​​the second cooling side plate 120 on the corresponding side of the battery pack, and improving the heat exchange efficiency of the battery pack.

[0085] Because each fifth side plate sub-channel 1222 is connected to the first cooling side plate 110, the coolant can be transmitted from the first cooling side plate 110 to each fifth side plate sub-channel 1222, thereby cooling and dissipating the corresponding two sides of the battery pack. It can effectively regulate the temperature of the battery pack, improve the regulation efficiency of the coolant, and effectively protect the performance and service life of the battery pack.

[0086] In one embodiment, Figure 1 and Figure 8 As shown, the side plate group 10 also includes a second connecting side plate 140, which is opposite to the first connecting side plate 130; the second connecting side plate 140 is isolated from the fourth side of the battery pack; the second connecting side plate 140 is connected between the first cooling side plate 110 and the second cooling side plate 120.

[0087] The fourth side of the battery pack is a smaller side and is opposite the third side. The fourth side of the battery pack can be isolated from the second connecting side plate 140 by an end plate or a partition to prevent localized cooling of the individual cells corresponding to the fourth side of the battery pack, which could lead to uneven temperatures among the individual cells in the battery pack.

[0088] The second connecting side plate 140 can be a flat plate-shaped structure. For example, the side plate group 10 can include four side plates, which together form a square-shaped side plate group 10. The four side plates are respectively configured as a first cooling side plate 110, a second cooling side plate 120, a first connecting side plate 130, and a second connecting side plate 140. That is, the first connecting side plate 130 is adjacent to the first cooling side plate 110, the first connecting side plate 130 is adjacent to the second cooling side plate 120, the first cooling side plate 110 and the second cooling side plate 120 are arranged opposite each other, and the second connecting side plate 140 is arranged opposite each other. It should be noted that the first cooling side plate 110, the second cooling side plate 120, the first connecting side plate 130, and the second connecting side plate 140 can be an integrally formed structure; in another example, the first cooling side plate 110, the second cooling side plate 120, the first connecting side plate 130, and the second connecting side plate 140 can also be connected by welding or screwing.

[0089] A flow channel may be provided within the second connecting side plate 140 for conveying coolant. It should be noted that to facilitate forming the flow channel within the second connecting side plate 140, a fourth window and a fourth panel may be provided on one side of the second connecting side plate 140. After the flow channel is formed, the fourth panel is mounted on the fourth window of the second connecting side plate 140 to seal the fourth window.

[0090] Because the second connecting side plate 140 is connected between the first cooling side plate 110 and the second cooling side plate 120, the coolant can enter from the first connecting side plate 130, and after being transmitted through the first connecting side plate 130, enter the first cooling side plate 110 and the bottom plate 20 for transmission. The coolant entering the first cooling side plate 110 is transmitted to the second cooling side plate 120 through the second connecting side plate 140, and is returned from the second cooling side plate 120 to the first connecting side plate 130. In addition, the coolant entering the bottom plate 20 is returned to the first connecting side plate 130, and the transmitted coolant is output from the first connecting side plate 130, thereby cooling and dissipating the corresponding two side surfaces and the bottom surface of the battery pack, effectively regulating the temperature of the battery pack, greatly increasing the cooling and heat dissipation area of ​​the battery pack, and improving the heat exchange efficiency of the battery pack. At the same time, it is only necessary to adjust the temperature and flow of the water inlet of the first connecting side plate 130 to adjust the temperature and flow of each channel, thereby improving the convenience of adjusting the flow and temperature of the coolant, improving the adjustment efficiency of the coolant, and effectively protecting the performance and service life of the battery pack.

[0091] In one embodiment, Figure 1 and Figure 4 As shown, the first connecting side plate 130 is provided with a first interface 510, which is respectively connected to the first end of the first side plate sub-channel 132 and the first end of the second side plate sub-channel 134; and / or, the first cooling side plate 110 is provided with a second interface 520, which is respectively connected to the base plate 20 and the second cooling side plate 120.

[0092] For example, the first interface 510 may be a liquid inlet interface, and the second interface 520 may be a liquid outlet interface. In another example, the first interface 510 may be a liquid outlet interface, and the second interface 520 may be a liquid inlet interface. The first interface 510 may be sealedly mounted on the first connecting side plate 130 by welding or screwing, and the second interface 520 may be sealedly mounted on the first connecting side plate 130 by welding or screwing.

[0093] The first interface 510 can be connected to the first port of the liquid-cooled driving device through a first connecting pipe, and the second interface 520 can be connected to the second port of the liquid-cooled driving device through a second connecting pipe, wherein the liquid-cooled driving device can be used to drive the transmission of coolant. For example, the liquid-cooled driving device may include a pump body, a temperature regulating module and a containing box. The pump body is connected to the containing box. The temperature regulating module can be set in the containing box. The containing box is used to store coolant, the temperature regulating module is used to regulate the temperature of the coolant, and the pump body is used to drive the flow of coolant.

[0094] For example, based on the first interface 510 being connected to the first end of the first side plate sub-channel 132 and the first end of the second side plate sub-channel 134 respectively, the second interface 520 being connected to the bottom plate 20 and the second cooling side plate 120 respectively, the first interface 510 and the second interface 520 are respectively connected to the liquid cooling drive device, and then the liquid cooling drive device drives the coolant to be transmitted through the first interface 510 to the first side plate sub-channel 132 and the second side plate sub-channel 134, and enters the first cooling side plate 110 and the second cooling side plate 120 through the first side plate sub-channel 132 and then returns to the second interface 520, and then the coolant is returned to the liquid cooling drive device through the second interface 520, so as to realize the cooling of the corresponding two sides of the battery pack. Liquid cooling circulation heat dissipation; the coolant enters the bottom plate 20 through the second side plate sub-channel 134, and the coolant transmitted from the bottom plate 20 is returned to the liquid cooling drive device through the second interface 520, thereby realizing liquid cooling circulation heat dissipation of the bottom surface of the battery pack, that is, cooling and heat dissipation of the corresponding two side surfaces and the bottom surface of the battery pack, which can effectively adjust the temperature of the battery pack, increase the cooling and heat dissipation area of ​​the battery pack, and improve the heat exchange efficiency of the battery pack. At the same time, it is only necessary to adjust the temperature and flow of the water inlet of the first connecting side plate 130 to adjust the temperature and flow of each channel, thereby improving the convenience of adjusting the flow and temperature of the coolant, improving the adjustment efficiency of the coolant, and effectively protecting the performance and service life of the battery pack.

[0095] In one embodiment, a first adhesive member is provided between the bottom plate 20 and the bottom surface of the battery pack; and / or a second adhesive member is provided between the cooling side plate and the corresponding side surface of the battery pack.

[0096] The first adhesive member may be an adhesive having a heat-conducting effect, such as heat-conducting silicone. The second adhesive member may be an adhesive having a heat-conducting effect, such as heat-conducting silicone.

[0097] By providing a first adhesive between the bottom plate 20 and the bottom surface of the battery pack, the bottom plate 20 and the bottom surface of the battery pack are completely aligned, preventing any gaps between them, thereby improving the heat exchange efficiency between the bottom plate 20 and the bottom surface of the battery pack. By providing a second adhesive between the cooling side plate and the corresponding side surface of the battery pack, the bottom plate 20 and the corresponding side surface of the battery pack are completely aligned, preventing any gaps between them, thereby improving the heat exchange efficiency between the bottom plate 20 and the corresponding side surface of the battery pack.

[0098] In one embodiment, a plurality of support columns are respectively disposed in the first bottom plate sub-channel 210 and the second bottom plate sub-channel 220 , and the support columns are disposed at intervals.

[0099] The support columns and the base plate 20 may be integrally formed. In another example, the support columns may be bonded or welded into the base plate 20. The base plate 20 also supports the battery pack. By providing a plurality of support columns within the channels of the base plate 20, the support function of the base plate 20 can be enhanced.

[0100] In one embodiment, a battery box is further provided, comprising a battery liquid cooling structure as described above.

[0101] For the specific description of the battery liquid cooling structure, reference may be made to the specific description of the battery liquid cooling structure in the above embodiment, which will not be repeated here.

[0102] Specifically, the battery liquid cooling structure includes a side plate group and a bottom plate, which enclose the side plate group to form a accommodating cavity for accommodating the battery pack; the side plate group includes at least one cooling side plate; the bottom plate is connected to the cooling side plate, and the cooling side plate is connected to the corresponding side surfaces of the battery pack to exchange heat with the corresponding sides of the battery pack; the bottom plate is connected to the bottom surface of the battery to exchange heat with the bottom surface of the battery pack, thereby realizing cooling and heat dissipation of the bottom and sides of the battery pack, thereby increasing the cooling area of ​​the battery pack.

[0103] In the above embodiment, the present application provides a bottom plate with a cooling function and provides at least one cooling side plate in the side plate group. Based on the connection between the bottom plate and the cooling side plate, the coolant can flow through the bottom plate and the side plate at the same time, thereby cooling and dissipating the bottom and side surfaces of the battery pack at the same time, increasing the contact heat conduction area of ​​the battery pack, improving the heat exchange efficiency, effectively regulating the temperature of the battery pack, and effectively protecting the performance and service life of the battery pack.

[0104] In one embodiment, a battery pack is further provided, comprising a battery pack and the battery box as described above; the battery pack is disposed in the battery box.

[0105] For the detailed description of the battery pack and the battery case, reference may be made to the detailed description of the battery pack and the battery case in the above embodiments, which will not be repeated here.

[0106] In the above embodiment, a bottom plate with a cooling function is provided, and at least one cooling side plate is provided in the side plate group. Based on the connection between the bottom plate and the cooling side plate, the coolant can flow through the bottom plate and the side plate at the same time, thereby cooling and dissipating the bottom and side surfaces of the battery pack at the same time, thereby increasing the contact heat conduction area with the battery pack, improving the heat exchange efficiency, effectively regulating the temperature of the battery pack, and effectively protecting the performance and service life of the battery pack.

[0107] It should be noted that the battery pack may also include components such as a BMS. The specific battery pack may include more components than those described in the above embodiments, or combine certain components, or have a different component arrangement.

[0108] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0109] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A battery liquid cooling structure, characterized in that: include: a side plate group, the side plate group comprising a first cooling side plate, a second cooling side plate, and a first connecting side plate, the first cooling side plate being adjacent to the second cooling side plate, the first connecting side plate being adjacent to the first cooling side plate; the first cooling side plate being connected to the second cooling side plate; The bottom plate and the side plate group together form a accommodating cavity, and the accommodating cavity is used to accommodate the battery pack; the battery pack has a first side surface and a second side surface that are relatively arranged and have a larger area; the first cooling side plate is connected to the bottom plate; the first cooling side plate is used to fit the first side surface of the battery pack, and the second cooling side plate is used to fit the second side surface of the battery pack to heat exchange the first side surface and the second side surface of the battery pack; the first connecting side plate is isolated from the third side surface of the battery pack; the first connecting side plate is connected between the bottom plate and the first cooling side plate; the first connecting side plate is connected between the bottom plate and the second cooling side plate; the bottom plate is used to connect the bottom surface of the battery pack to heat exchange the bottom surface of the battery pack.

2. The battery liquid cooling structure according to claim 1, characterized in that: The first connecting side plate is provided with a first side plate sub-channel and a second side plate sub-channel; The first end of the first side plate sub-channel is connected to the first end of the second side plate sub-channel; the second end of the first side plate sub-channel is connected to the first cooling side plate, and the second end of the second side plate sub-channel is connected to the bottom plate.

3. The battery liquid cooling structure according to claim 1, characterized in that: The first connecting side plate is further provided with a third side plate sub-channel; The third side plate sub-channel is connected between the bottom plate and the second cooling side plate.

4. The battery liquid cooling structure according to claim 1, characterized in that: The bottom plate is provided with a first bottom plate sub-channel and a second bottom plate sub-channel; The first end of the first bottom plate sub-channel is connected to the first connecting side plate, the second end of the first bottom plate sub-channel is connected to the second end of the second bottom plate sub-channel, and the first end of the second bottom plate sub-channel is connected to the first connecting side plate.

5. The battery liquid cooling structure according to claim 4, characterized in that: At least one flow guide is provided between the second end of the first bottom plate sub-channel and the second end of the second bottom plate sub-channel.

6. The battery liquid cooling structure according to any one of claims 1 to 5, characterized in that: A first channel is provided in the first cooling side plate, and the first channel is provided with at least one first isolating member to divide the first channel into at least two fourth side plate sub-channels; Each of the fourth side plate sub-channels is respectively connected between the bottom plate and the second cooling side plate.

7. The battery liquid cooling structure according to any one of claims 1 to 5, characterized in that: A second channel is provided in the second cooling side plate, and the second channel is provided with at least one second isolating member to divide the second channel into at least two fifth side plate sub-channels; Each of the fifth side plate sub-channels is connected to the first cooling side plate.

8. The battery liquid cooling structure according to any one of claims 1 to 5, characterized in that: The side plate assembly further includes a second connecting side plate, the second connecting side plate being opposite to the first connecting side plate; the second connecting side plate being isolated from the fourth side surface of the battery pack; The second connecting side plate is connected between the first cooling side plate and the second cooling side plate.

9. The battery liquid cooling structure according to claim 2, characterized in that: The first connecting side plate is provided with a first interface, and the first interface is respectively connected to the first end of the first side plate sub-channel and the first end of the second side plate sub-channel; And / or, the first cooling side plate is provided with a second interface, and the second interface is connected to the bottom plate and the second cooling side plate respectively.

10. The battery liquid cooling structure according to claim 1, characterized in that: A first adhesive member is provided between the bottom plate and the bottom surface of the battery pack; And / or, a second adhesive member is provided between the cooling side plate and the corresponding side surface of the battery pack.

11. A battery box, characterized in that: Comprising the battery liquid cooling structure according to any one of claims 1 to 10.

12. A battery pack, characterized in that: It comprises a battery pack and a battery box as claimed in claim 11; the battery pack is arranged in the battery box.

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