Bottom plate, battery pack and electric equipment

Abstract

The utility model provides a bottom plate, a battery pack and electric equipment, and relates to the technical field of batteries. A liquid inlet flow channel and a liquid outlet flow channel are arranged on the bottom plate, the liquid inlet flow channel is connected with a liquid inlet pipe through which a heat exchange medium flows in, the liquid outlet flow channel is connected with a liquid outlet pipe through which the heat exchange medium flows out, and the liquid inlet pipe and the liquid outlet pipe are arranged on one side, far away from the batteries, of the bottom plate; and one ends of the two blind flow channels are communicated with the liquid inlet flow channel and the liquid outlet flow channel respectively, so that the two blind flow channels are filled with heat exchange media, and the liquid inlet flow channel, the liquid outlet flow channel and the blind flow channels are all arranged on the side, close to the batteries, of the bottom plate in a protruding mode.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more specifically, to a base plate, a battery pack, and an electrical device. Background Technology

[0002] Currently, new energy vehicles are placing increasingly higher demands on the charging rate of power batteries, and the temperature rise of power batteries under high-rate charging and discharging conditions (above 4C) is receiving more and more attention.

[0003] To address the issue of battery temperature rise, heat exchange plates are typically installed within the battery pack for heat exchange. These heat exchange plates require inlets and outlets to manage the heat exchange medium. When the heat exchange plate is located on the bottom surface, the inlets and outlets are located on the top surface. Inlets and outlets are also provided on the side walls of the battery pack to connect with the inlets and outlets of the heat exchange plate. This structure means that conduits and connectors for the heat exchange medium can only be installed from the side walls of the battery pack. When space is limited around the battery pack, it is impossible to install conduits and connectors. Therefore, finding a way to facilitate the inlet and outlet installation of the heat exchange medium without increasing the battery pack installation space has become an urgent problem to be solved. Utility Model Content

[0004] The purpose of this application includes, for example, providing a base plate, a battery pack, and electrical equipment that facilitates the inlet and outlet installation of the heat exchange medium without increasing the battery pack installation space.

[0005] This application can be implemented as follows:

[0006] In a first aspect, this application provides a base plate for suppressing thermal runaway of multiple batteries. The base plate is provided with an inlet channel and an outlet channel. The inlet channel is connected to an inlet pipe for the inflow of heat exchange medium, and the outlet channel is connected to an outlet pipe for the outflow of the heat exchange medium. The inlet pipe and the outlet pipe are located on the side of the base plate away from the multiple batteries.

[0007] It also includes blind channels, one end of which is connected to the liquid inlet channel and the liquid outlet channel respectively, so that the heat exchange medium is filled in the two blind channels. The liquid inlet channel, the liquid outlet channel and the blind channels are all protruding from the bottom plate on the side near the plurality of batteries.

[0008] Optionally, the bottom plate has a partial recess on the side away from the plurality of batteries to form two grooves, the two grooves are spaced apart, and the bottom plate is provided with two sealing plates, which respectively seal and cover the two grooves to form the liquid inlet channel and the liquid outlet channel;

[0009] The bottom plate is provided with a recessed mounting groove at the edge of the groove, the sealing plate is embedded in the mounting groove, and the depth of the mounting groove is less than the depth of the groove.

[0010] Optionally, the liquid inlet pipe and the liquid outlet pipe are respectively arranged at one end of the two sealing plates along the first direction and respectively communicate with the liquid inlet flow channel and the liquid outlet flow channel.

[0011] The liquid inlet flow channel is further connected with a liquid inlet connector, and the liquid outlet flow channel is further connected with a liquid outlet connector, the liquid inlet connector and the liquid outlet connector are used for connecting a cooling assembly, so that the heat exchange medium flows into the cooling assembly from the liquid inlet connector and flows out from the cooling assembly to the liquid outlet connector, wherein the liquid inlet connector and the liquid outlet connector are arranged on the side of the bottom plate away from the sealing plate and located at the other end of the two sealing plates along the first direction.

[0012] Optionally, the pipe wall of the blind flow channel comprises a top wall and two side walls connected with the top wall and the bottom plate, at least one side wall is inwardly recessed to form a thinned recess, and the thinned recess has a rectangular, trapezoidal or triangular shape in a cross section perpendicular to the extension direction of the blind flow channel.

[0013] In a second aspect, the application further provides a battery pack comprising the bottom plate, the support, the box, a plurality of batteries and a cooling assembly, the support is used for fixing a plurality of the batteries, the box is provided with a containing cavity to contain the support and the batteries, the bottom plate is arranged at the bottom of the box to correspond to the bottom of the batteries, the inlet of the cooling assembly is connected with the liquid inlet connector, and the outlet of the cooling assembly is connected with the liquid outlet connector.

[0014] Optionally, the cooling assembly comprises a first cold plate, a liquid inlet collector and a liquid outlet collector, the first cold plate is arranged at the top of the battery, the liquid inlet collector is used for connecting the inlet of the first cold plate with the liquid inlet connector, and the liquid outlet collector is used for connecting the outlet of the first cold plate with the liquid outlet connector.

[0015] Optionally, one end of the liquid inlet collector is plug-in connected with the liquid inlet connector to realize the inflow of the heat exchange medium, the other end is plug-in connected with the inlet of the first cold plate to realize the outflow of the heat exchange medium, a first fixing part is protruded on the side wall of the end of the liquid inlet collector close to the liquid inlet connector, a first boss is protruded on the liquid inlet connector, and the first fixing part and the first boss are fixed by bolts to fix the liquid inlet collector.

[0016] One end of the liquid outlet header is plug-in connected with the liquid outlet connector to realize the outflow of the heat exchange medium, the other end is plug-in connected with the outlet of the first cold plate to realize the inflow of the heat exchange medium, a second fixing part is protruded on the side wall of the one end of the liquid outlet header close to the liquid outlet connector, the liquid outlet connector is protruded with a second boss, and the second fixing part and the second boss are fixed by bolts to fix the liquid outlet header.

[0017] Optionally, the cooling assembly further comprises a plurality of second cold plates arranged on the side surface of the battery to adhere to the side wall of the battery, one end of adjacent second cold plates is provided with an inlet connecting pipe and an outlet connecting pipe to realize parallel communication between the plurality of second cold plates.

[0018] The inlet header is bent and communicated with a first connecting piece at one end close to the inlet connecting pipe, the first connecting piece is sleeved on the inlet connecting pipe and communicated with the inlet connecting pipe to connect the inlet of the second cold plate, the outlet header is bent and communicated with a second connecting piece at one end close to the outlet connecting pipe, the second connecting piece is sleeved on the outlet connecting pipe and communicated with the outlet connecting pipe to connect the outlet of the second cold plate.

[0019] Optionally, the second cold plate comprises an adapter sleeved on the inlet connecting pipe and the outlet connecting pipe to realize conduction, one end of the first connecting piece in the extension direction of the inlet connecting pipe is connected with the adapter, and / or one end of the second connecting piece in the extension direction of the outlet connecting pipe is connected with the adapter.

[0020] In a third aspect, the application further provides a power utilization equipment comprising the battery pack.

[0021] The beneficial effects of the bottom plate, the battery pack and the electric equipment of the present application include, for example: in order to facilitate heat exchange without increasing the heat exchange plate, a bottom plate is designed, the bottom plate is provided with an inlet flow channel and an outlet flow channel, the inlet flow channel is connected with an inlet pipe, the inlet pipe is used for flowing in the heat exchange medium, the outlet flow channel is connected with an outlet pipe, the outlet pipe is used for flowing out the heat exchange medium, the inlet pipe and the outlet pipe are arranged on the first side surface of the bottom plate; the inlet flow channel is also connected with an inlet joint, and the outlet flow channel is also connected with an outlet joint, the inlet joint and the outlet joint are used for connecting the cooling assembly, so that the heat exchange medium flows into the cooling assembly from the inlet joint and flows out of the cooling assembly from the outlet joint, wherein the inlet joint and the outlet joint are arranged on the second side surface of the bottom plate away from the first side surface, wherein the second side surface is used for corresponding to the battery. In the process of heat exchange, the heat exchange medium flows into the inlet flow channel from the inlet pipe of the first side surface of the bottom plate, and then flows into the cooling assembly located on the second side surface of the bottom plate from the inlet joint and flows out of the cooling assembly from the outlet joint, and finally flows out to the outlet pipe through the outlet flow channel to realize the circulation of the heat exchange medium, so that the heat exchange medium is conducted through the bottom plate, and the heat exchange medium can realize the inlet and outlet on the first side surface of the bottom plate, so that the inlet and outlet can be realized on the bottom surface of the battery pack, the installation space of the battery pack is saved, the production and maintenance are facilitated, the overall volume is saved, and the volume utilization rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0023] Figure 1 It is a schematic diagram of the first view angle of the bottom plate in the embodiments of the present application;

[0024] Figure 2 It is an explosion diagram of the second view angle of the bottom plate in the embodiments of the present application;

[0025] Figure 3 It is a sectional view of the first kind of section of the blind flow channel in the embodiments of the present application;

[0026] Figure 4 It is a sectional view of the second kind of section of the blind flow channel in the embodiments of the present application;

[0027] Figure 5 It is a sectional view of the third kind of section of the blind flow channel in the embodiments of the present application;

[0028] Figure 6 It is an explosion diagram of the battery pack in the embodiments of the present application;

[0029] Figure 7A partial view of a battery pack in the embodiments of the present application;

[0030] Figure 8 A partial view of a battery pack in the embodiments of the present application; Figure 7 An enlarged view of part A in FIG. 1.

[0031] FIG. 1 is a partial view of a battery pack in the embodiments of the present application.

[0032] 200-cooling assembly; 210-first cold plate; 220-liquid inlet manifold; 221-first fixed part; 222-first connecting part; 223-adapter; 230-liquid outlet manifold; 231-second fixed part; 232-second connecting part; 240-second cold plate; 241-liquid inlet connecting pipe; 242-liquid outlet connecting pipe;

[0033] 300-box; 310-explosion-proof valve;

[0034] 400-battery; 410-busbar;

[0035] 500-thermally conductive structural adhesive;

[0036] X-first direction; Y-second direction. DETAILED DESCRIPTION

[0037] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, 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 some of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0038] Therefore, the detailed description of the embodiments of the present application provided below in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0039] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0040] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the utility model product is usually placed, which is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0041] In addition, if the terms "first", "second" and the like appear, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0042] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0043] Please refer to Figure 1 , Figure 2 The embodiments of the present application provide a bottom plate 100 for inhibiting thermal runaway of a plurality of batteries 400, the bottom plate 100 is provided with an inlet flow channel 110 and an outlet flow channel 120, the inlet flow channel 110 is connected with an inlet pipe 111 for flowing in of a heat exchange medium, the outlet flow channel 120 is connected with an outlet pipe 121 for flowing out of the heat exchange medium, the inlet pipe 111 and the outlet pipe 121 are arranged on a side of the bottom plate 100 away from the plurality of batteries 400, and the side of the bottom plate 100 is a first side; the inlet flow channel 110 is further connected with an inlet connector 112, and the outlet flow channel 120 is further connected with an outlet connector 122, the inlet connector 112 and the outlet connector 122 are used for connecting a cooling assembly 200, so that the heat exchange medium flows into the cooling assembly 200 from the inlet connector 112 and flows out of the cooling assembly 200 to the outlet connector 122, wherein the inlet connector 112 and the outlet connector 122 are arranged on a second side of the bottom plate 100 away from the first side.

[0044] In the process of heat exchange, the battery 400 corresponds to the second side of the bottom plate 100, the heat exchange medium flows into the inlet flow channel 110 from the inlet pipe 111 located on the first side of the bottom plate 100, then flows into the cooling assembly 200 from the inlet connector 112 and flows out of the cooling assembly 200 to the outlet connector 122, and finally flows out to the outlet pipe 121 through the outlet flow channel 120 to realize heat exchange with the battery 400, the bottom plate 100 can be used for the conduction of the heat exchange medium, and the inlet and outlet can be installed on the first side of the bottom plate 100, the cooling assembly 200 is connected on the second side of the bottom plate 100, so that the bottom plate 100 is used for switching, without occupying the space around the bottom plate for installation, saving the installation volume, at the same time, the overall volume of the electrical equipment can be saved, the volume utilization rate is improved, and then the high battery energy density is ensured.

[0045] In the embodiment, the bottom plate 100 is partially recessed on the side away from the plurality of batteries 400 to form two grooves 130, the two grooves 130 are arranged at intervals, the bottom plate 100 is provided with two sealing plates 140, the two sealing plates 140 are respectively sealed and cover the two grooves 130 to form the liquid inlet flow channel 110 and the liquid outlet flow channel 120; the bottom plate 100 is provided with recessed mounting grooves 150 at the edges of the grooves 130, the sealing plates 140 are embedded in the mounting grooves 150, and the depth of the mounting grooves 150 is less than the depth of the grooves 130; the liquid inlet pipe 111 and the liquid outlet pipe 121 are respectively arranged at one end of the two sealing plates 140 along the first direction X and respectively communicate with the liquid inlet flow channel 110 and the liquid outlet flow channel 120.

[0046] It should be noted that the two sealing plates 140 are respectively embedded in the corresponding mounting grooves 150 to seal the two grooves 130 to form the liquid inlet flow channel 110 and the liquid outlet flow channel 120. By arranging the mounting grooves 150, the sealing performance of the liquid inlet flow channel 110 and the liquid outlet flow channel 120 can be improved. The width direction of the bottom plate 100 is the first direction X, the liquid inlet pipe 111 and the liquid outlet pipe 121 are close to the middle part of the bottom plate 100 in the first direction X, and the liquid inlet connector 112 and the liquid outlet connector 122 are close to one end of the bottom plate 100 in the first direction. That is, the liquid inlet pipe 111 and the liquid outlet pipe 121 can be arranged at the center of the bottom plate 100, which is further convenient for installation and maintenance and improves the installation efficiency, and meanwhile, the liquid inlet connector 112 and the liquid outlet connector 122 can be arranged at the edge of the bottom plate 100, which is convenient for connecting with the cooling assembly 200 and improves the production efficiency.

[0047] The bottom plate 100 is also provided with two blind flow channels 160, one end of the two blind flow channels 160 respectively communicates with the liquid inlet flow channel 110 and the liquid outlet flow channel 120, so that the two blind flow channels 160 are filled with heat exchange medium, and the liquid inlet flow channel 110, the liquid outlet flow channel 120 and the blind flow channel 160 are all protruded on the side of the bottom plate 100 close to the plurality of batteries 400.

[0048] The blind flow channel 160 is provided with a communication end and at least one closed end, the communication end of the blind flow channel 160 communicates with one of the liquid inlet flow channel 110 and the liquid outlet flow channel 120, so as to fill the heat exchange medium in the blind flow channel 160.

[0049] In the embodiment, the communication end of one of the blind flow channels 160 communicates with the liquid inlet flow channel 110, and the communication end of the other blind flow channel 160 communicates with the liquid outlet flow channel 120.

[0050] Please refer to Figures 3-5 The pipe wall of the blind flow channel 160 includes a top wall 161 and two side walls 162 connecting the top wall 161 and the bottom plate 100, at least one side wall 162 is inwardly recessed to form a thinned recess 1621, and the cross-sectional shape of the thinned recess 1621 in the direction perpendicular to the extension direction of the blind flow channel 160 is rectangular, trapezoidal or triangular.

[0051] It should be noted that one of the side walls 162 is inwardly recessed to form a thinning groove 1621, or both of the side walls 162 are inwardly recessed to form the thinning groove 1621.

[0052] One or more thinning grooves 1621 can be arranged on a single side wall 162, for example, two thinning grooves 1621 are arranged on a single side wall 162 in the direction perpendicular to the bottom plate 100. The arrangement of the thinning grooves 1621 makes the thickness of the side wall 162 locally thinned, reduces the structural strength, and when the blind flow channel 160 is impacted, for example, the high-temperature and high-pressure gas spouted by the thermal runaway of the battery 400 impacts the blind flow channel 160, the side wall 162 of the blind flow channel 160 is easily broken, at this time, the heat exchange medium in the blind flow channel 160 flows out to quickly cool the battery 400, so as to reduce the impact of the thermal runaway of the battery 400.

[0053] In the embodiment, the cross-sectional shape of the thinning groove 1621 perpendicular to the extension direction of the blind flow channel 160 is rectangular, trapezoidal or triangular, so as to facilitate production and manufacturing. In other embodiments, the cross-sectional shape of the thinning groove 1621 perpendicular to the extension direction of the blind flow channel 160 can also be other shapes, for example, semicircular, which is not limited.

[0054] The blind flow channel 160 includes a plurality of first flow channels 163 arranged in parallel and two second flow channels 164 arranged in parallel. The plurality of first flow channels 163 are in communication with any second flow channel 164. The first flow channels 163 extend along the second direction Y, and the second flow channels 164 extend along the first direction X, wherein the first direction X is perpendicular to the second direction Y.

[0055] In the embodiment, the communication end of the blind flow channel 160 is arranged in one of the second flow channels 164. The pipe wall of the first flow channel 163 and the second flow channel 164 includes the top wall 161 and the two side walls 162 connecting the top wall 161 and the bottom plate 100. At least one side wall 162 is inwardly recessed to form a thinning groove 1621. The blind flow channel 160 is uniformly covered above the bottom plate 100 through the first flow channel 163 and the second flow channel 164, so as to correspond to a plurality of batteries 400.

[0056] When the blind flow channel 160 is impacted, the side walls 162 of the first flow channel 163 and the second flow channel 164 are broken, at this time, the heat exchange medium in the first flow channel 163 and the second flow channel 164 flows out to quickly cool the battery 400, so as to inhibit the thermal runaway of the battery 400 and improve the inhibition effect.

[0057] Please refer to Figures 6-8The embodiments of the present application also provide a battery pack, which comprises the bottom plate 100, the cooling assembly 200, a support, the box 300 and a plurality of batteries 400. The support is used for fixing the plurality of batteries 400. The box 300 is provided with a receiving cavity for accommodating the support and the batteries 400. The bottom plate 100 is arranged at the bottom of the box 300 to correspond to the bottom of the batteries 400. The inlet of the cooling assembly 200 is connected with the liquid inlet connector 112, and the outlet of the cooling assembly 200 is connected with the liquid outlet connector 122.

[0058] The support is fixed with the box 300 to support and fix the plurality of batteries 400. The heat exchange medium flows into the cooling assembly 200 from the liquid inlet connector 112 and then flows out of the cooling assembly 200 to the liquid outlet connector 122. One side of the box 300 is provided with an explosion-proof valve 310. The first side of the bottom plate 100 is away from the batteries 400 to realize the liquid inlet and outlet from the bottom of the battery pack, thereby facilitating the maintenance and management.

[0059] The cooling assembly 200 comprises a first cold plate 210, a liquid inlet collecting piece 220 and a liquid outlet collecting piece 230. The first cold plate 210 is arranged at the top of the batteries 400. The first cold plate 210 and the busbar 410 at the top of the batteries 400 are provided with a heat-conducting structural adhesive 500. The first cold plate 210 is fixedly connected with the box 300. The liquid inlet collecting piece 220 is used for connecting the inlet of the first cold plate 210 with the liquid inlet connector 112. The liquid outlet collecting piece 230 is used for connecting the outlet of the first cold plate 210 with the liquid outlet connector 122. Through the liquid inlet collecting piece 220 and the liquid outlet collecting piece 230, the cooling assembly 200 and the bottom plate 100 are connected, thereby facilitating the installation and improving the production efficiency.

[0060] Preferably, the first cold plate 210 is in contact with the busbar 410 at the top of the batteries 400 through the heat-conducting structural adhesive 500, so that the busbar 410 can be quickly cooled, the cross-sectional area of the busbar 410 can be reduced, the heat exchange effect can be improved, the cost can be reduced, and the weight can be reduced.

[0061] In the embodiment, one end of the liquid inlet manifold 220 is plug-in connectable with the liquid inlet connector 112 to realize the inflow of the heat exchange medium, and the other end is plug-in connectable with the inlet of the first cold plate 210 to realize the outflow of the heat exchange medium. A first fixing portion 221 is protruded on the side wall of the one end of the liquid inlet manifold 220 close to the liquid inlet connector 112. The liquid inlet connector 112 is protruded with a first boss 1121. The first fixing portion 221 and the first boss 1121 are fixed by bolts to fix the liquid inlet manifold 220. One end of the liquid outlet manifold 230 is plug-in connectable with the liquid outlet connector 122 to realize the outflow of the heat exchange medium, and the other end is plug-in connectable with the outlet of the first cold plate 210 to realize the inflow of the heat exchange medium. A second fixing portion 231 is protruded on the side wall of the one end of the liquid outlet manifold 230 close to the liquid outlet connector 122. The liquid outlet connector 122 is protruded with a second boss 1221. The second fixing portion 231 and the second boss 1221 are fixed by bolts to fix the liquid outlet manifold 230. Through the plug-in connection, the convenience of the connection between the cooling assembly 200 and the bottom plate 100 is improved, the installation is facilitated, and the maintenance and replacement of the cooling assembly 200 according to the needs are facilitated.

[0062] In other embodiments, the liquid inlet manifold 220 and the liquid outlet manifold 230 can also be integrally welded or integrally bonded with the bottom plate 100, respectively.

[0063] In the embodiment, the cooling assembly 200 further comprises a plurality of second cold plates 240 arranged on the side surface of the battery 400 to adhere to the side wall of the battery 400. One end of adjacent second cold plates 240 is provided with a liquid inlet connecting pipe 241 and a liquid outlet connecting pipe 242 to realize parallel communication between the plurality of second cold plates 240. The liquid inlet manifold 220 is bent and communicated at one end close to the liquid inlet connecting pipe 241 to be provided with a first connecting piece 222, which is sleeved on the liquid inlet connecting pipe 241 and communicated with the liquid inlet connecting pipe 241 to connect the inlet of the second cold plate 240. The liquid outlet manifold 230 is bent and communicated at one end close to the liquid outlet connecting pipe 242 to be provided with a second connecting piece 232, which is sleeved on the liquid outlet connecting pipe 242 and communicated with the liquid outlet connecting pipe 242 to connect the outlet of the second cold plate 240.

[0064] The plurality of batteries 400 form a plurality of rows. A single second cold plate 240 is arranged between two rows of batteries 400 and adheres to the side walls of the two rows of batteries 400 at the same time.

[0065] The heat exchange medium flows into the liquid inlet manifold 220 from the liquid inlet connector 112, then flows into the liquid inlet connecting pipe 241 from the liquid inlet manifold 220, flows into the plurality of second cold plates 240 from the liquid inlet connecting pipe 241, then flows out from the plurality of second cold plates 240 to the liquid outlet connecting pipe 242, then flows into the liquid outlet manifold 230 from the liquid outlet connecting pipe 242, and finally flows into the liquid outlet connector 122. By means of the liquid inlet manifold 220 and the liquid outlet manifold 230, the first cold plate 210 and the second cold plate 240 can be connected at the same time, the structure can be simplified, and the integration is facilitated, the liquid inlet and outlet management is facilitated, the parallel connection of the first cold plate 210 and the second cold plate 240 can be realized, and the difference in heat exchange effect caused by the series connection of the first cold plate 210 and the second cold plate 240 is avoided, thereby affecting the overall temperature uniformity of the battery 400.

[0066] Reference Figure 7 As shown in FIG. 6, the second cold plate 240 comprises an adapter 223 sleeved on the liquid inlet connecting pipe 241 and the liquid outlet connecting pipe 242 to realize conduction, the first connecting piece 222 is connected to the adapter 223 at one end in the extension direction of the liquid inlet connecting pipe 241, and / or the second connecting piece 232 is connected to the adapter 223 at one end in the extension direction of the liquid outlet connecting pipe 242. By directly connecting the adapter 223, the stable fixation of the liquid outlet manifold 230 and the liquid inlet manifold 220 is maintained.

[0067] Optionally, the first connecting piece 222 of the liquid inlet manifold 220 is sleeved on the liquid inlet connecting pipe 241 and connected to the adapter 223 at the same time, and the first fixed part 221 and the first boss 1121 of the liquid inlet manifold 220 are fixed by bolts, so that fixation in the vertical direction and the horizontal direction can be realized; the second connecting piece 232 of the liquid outlet manifold 230 is sleeved on the liquid outlet connecting pipe 242 and connected to the adapter 223 at the same time, and the second fixed part 231 and the second boss 1221 of the liquid outlet manifold 230 are fixed by bolts, so that fixation in the vertical direction and the horizontal direction can be realized. In other embodiments, the first connecting piece 222 can also not be connected to the adapter 223, and / or the second connecting piece 232 can also not be connected to the adapter 223.

[0068] The embodiments of the present application also provide a power utilization device comprising the battery pack described above. For example, the power utilization device can be a vehicle, a ship, a spacecraft, etc. The vehicle can be a fuel automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The embodiments of the present application do not specially limit the power utilization device described above.

[0069] The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A floor plate for suppressing thermal runaway of a plurality of batteries (400), characterized by, The bottom plate (100) is provided with an inlet flow channel (110) and an outlet flow channel (120), the inlet flow channel (110) is connected with an inlet pipe (111) for flowing in of a heat exchange medium, the outlet flow channel (120) is connected with an outlet pipe (121) for flowing out of the heat exchange medium, and the inlet pipe (111) and the outlet pipe (121) are arranged on the side of the bottom plate (100) away from the plurality of batteries (400); It also includes blind flow channels (160), one end of two blind flow channels (160) is respectively communicated with the inlet flow channel (110) and the outlet flow channel (120), so that the two blind flow channels (160) are filled with the heat exchange medium, and the inlet flow channel (110), the outlet flow channel (120) and the blind flow channel (160) are protruded on the side of the bottom plate (100) close to the plurality of batteries (400).

2. The base plate of claim 1, wherein The side of the bottom plate (100) away from the plurality of batteries (400) is partially recessed to form two grooves (130), and the two grooves (130) are arranged at intervals, the bottom plate (100) is provided with two sealing plates (140), and the two sealing plates (140) are respectively sealed and arranged in the two grooves (130) to form the inlet flow channel (110) and the outlet flow channel (120); The bottom plate (100) is provided with recessed mounting grooves (150) on the edges of the grooves (130), the sealing plates (140) are embedded in the mounting grooves (150), and the depth of the mounting grooves (150) is less than the depth of the grooves (130).

3. The base plate of claim 2, wherein The inlet pipe (111) and the outlet pipe (121) are respectively arranged at one end of the two sealing plates (140) along a first direction (X) and are respectively communicated with the inlet flow channel (110) and the outlet flow channel (120); The inlet flow channel (110) is also connected with an inlet connector (112), the outlet flow channel (120) is also connected with an outlet connector (122), the inlet connector (112) and the outlet connector (122) are used for connecting a cooling assembly (200), so that the heat exchange medium flows into the cooling assembly (200) from the inlet connector (112) and flows out of the cooling assembly (200) to the outlet connector (122), wherein the inlet connector (112) and the outlet connector (122) are arranged on the side of the bottom plate (100) away from the sealing plates (140) and are located at the other end of the two sealing plates (140) along the first direction (X).

4. The base plate of claim 1, wherein The pipe wall of the blind flow channel (160) includes a top wall (161) and two side walls (162) connecting the top wall (161) and the bottom plate (100), at least one side wall (162) is recessed inward to form a thinned groove (1621), and the thinned groove (1621) has a rectangular, trapezoidal or triangular shape in a cross section perpendicular to the extension direction of the blind flow channel (160).

5. A battery pack, characterized by, The bottom plate (100) of claim 3, a support for fixing a plurality of the batteries (400), a box (300) provided with a receiving cavity for accommodating the support and the batteries (400), the bottom plate (100) arranged at the bottom of the box (300) to correspond to the bottom of the batteries (400), and a cooling assembly (200) with an inlet connected to the liquid inlet connector (112) and an outlet connected to the liquid outlet connector (122).

6. The battery pack of claim 5, wherein, The cooling assembly (200) comprises a first cold plate (210), a liquid inlet manifold (220), and a liquid outlet manifold (230), the first cold plate (210) arranged at the top of the batteries (400), the liquid inlet manifold (220) for connecting the inlet of the first cold plate (210) to the liquid inlet connector (112), and the liquid outlet manifold (230) for connecting the outlet of the first cold plate (210) to the liquid outlet connector (122).

7. The battery pack of claim 6, wherein, One end of the liquid inlet manifold (220) is plug-in connected to the liquid inlet connector (112) to realize the inflow of the heat exchange medium, and the other end is plug-in connected to the inlet of the first cold plate (210) to realize the outflow of the heat exchange medium, a first fixing part (221) is protruded from the side wall (162) of one end of the liquid inlet manifold (220) close to the liquid inlet connector (112), a first boss (1121) is protruded from the liquid inlet connector (112), and the first fixing part (221) and the first boss (1121) are fixed by bolts to fix the liquid inlet manifold (220); One end of the liquid outlet manifold (230) is plug-in connected to the liquid outlet connector (122) to realize the outflow of the heat exchange medium, and the other end is plug-in connected to the outlet of the first cold plate (210) to realize the inflow of the heat exchange medium, a second fixing part (231) is protruded from the side wall (162) of one end of the liquid outlet manifold (230) close to the liquid outlet connector (122), a second boss (1221) is protruded from the liquid outlet connector (122), and the second fixing part (231) and the second boss (1221) are fixed by bolts to fix the liquid outlet manifold (230).

8. The battery pack of claim 6, wherein, The cooling assembly (200) further comprises a plurality of second cold plates (240) arranged at the side of the batteries (400) to adhere to the side wall of the batteries (400), and the liquid inlet connector (241) and the liquid outlet connector (242) are arranged at one end of adjacent second cold plates (240) to realize parallel connection between the plurality of second cold plates (240). The liquid inlet collecting piece (220) is provided with a first connecting piece (222) near one end of the liquid inlet connecting pipe (241) in a bending communication mode, the first connecting piece (222) is sleeved on the liquid inlet connecting pipe (241) and communicates with the liquid inlet connecting pipe (241) to connect the inlet of the second cold plate (240), and the liquid outlet collecting piece (230) is provided with a second connecting piece (232) near one end of the liquid outlet connecting pipe (242) in a bending communication mode, the second connecting piece (232) is sleeved on the liquid outlet connecting pipe (242) and communicates with the liquid outlet connecting pipe (242) to connect the outlet of the second cold plate (240).

9. The battery pack of claim 8, wherein, The second cold plate (240) comprises an adapter (223) sleeved on the liquid inlet connecting pipe (241) and the liquid outlet connecting pipe (242) to realize conduction, the first connecting piece (222) is connected to the adapter (223) at one end in the extension direction of the liquid inlet connecting pipe (241), and / or the second connecting piece (232) is connected to the adapter (223) at one end in the extension direction of the liquid outlet connecting pipe (242).

10. An electric device, characterized by The battery pack comprises any one of claims 5-9.

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