Battery pack and automobile

Abstract

The utility model provides a battery pack and an automobile, and relates to the technical field of batteries. The battery pack comprises a box body, a cooling plate, a buffer layer and a battery pack, the battery pack is arranged in the containing cavity of the box body, part of the frame is in lap joint with the cooling plate, so that the cooling plate can bear and support the frame, the frame is further arranged on the bottom plate, the bottom plate can also support the frame, and therefore the frame structure is stable. The cooling plate is located between the bottom plate and the frame, so that part of the cooling plate can be clamped by the bottom plate and the frame, the cooling plate can be more reliably fixed in the box body, the integration of the box body and the cooling plate is better, and the structure is more compact. The buffer layer between the cooling plate and the bottom plate can prevent the bottom plate from making hard and straight contact with the cooling plate, and therefore the bottom plate and the cooling plate can be prevented from being damaged due to mutual impact.

Description

Technical Field

[0001] The present application relates to a battery pack and a car, and belongs to the field of automobile technology. Background Art

[0002] In order to improve the integration efficiency of the battery module, the current battery module adopts a large module structure with multiple cells stacked, which can increase the capacity of the battery module. Correspondingly, the heat generated by the battery module during operation is relatively large, and the battery module needs to be cooled.

[0003] At present, the main way to dissipate heat for battery modules is to set a cooling plate, which is in contact with the bottom of the battery module so that the heat of the battery module can be transferred to the cooling plate. However, the current installation method of the cooling plate is to directly install it on the bottom plate of the battery pack box, resulting in poor connection reliability between the bottom plate and the box. Utility Model Content

[0004] The present application provides a battery pack and a vehicle, which solve the problem of poor reliability of connection between a cooling plate and a box body of a battery pack in the related art.

[0005] In a first aspect, the present application provides a battery pack, comprising:

[0006] A box body, the box body comprising a bottom plate, a frame and an upper cover, the frame being arranged at the edge of the bottom plate along the circumference of the bottom plate, the upper cover being connected to the frame and opposite to the bottom plate, the bottom plate, the frame and the upper cover being arranged to form a cavity;

[0007] A cooling plate is arranged in the cavity, and the cooling plate is located between the bottom plate and the frame, a part of the frame is detachably overlapped on the cooling plate, a connection part between the bottom plate and the frame surrounds a connection part between the cooling plate and the frame, and the cooling plate is provided with a first liquid inlet, a first liquid outlet and a cooling channel, and the first liquid inlet and the first liquid outlet are both connected to the cooling channel;

[0008] A buffer layer is disposed between the base plate and the cooling plate;

[0009] The battery pack is arranged on the cooling plate and is bonded to the cooling plate via a heat-conducting structural adhesive layer.

[0010] In some embodiments, it also includes a water inlet and a water outlet, the frame is provided with a second liquid inlet and a second liquid outlet, the first liquid inlet is located at the bottom of the second liquid inlet and is connected to the second liquid inlet, the first liquid outlet is located at the bottom of the second liquid outlet and is connected to the second liquid inlet, the water inlet is arranged on the frame and is connected to the second liquid inlet, and the water outlet is arranged on the frame and is connected to the second liquid outlet.

[0011] In some embodiments, the frame has a water inlet and return portion located on the outer wall of the frame, the second liquid inlet and the second liquid outlet are opened in the water inlet and return portion, the edge of the cooling plate has a raised portion, the first liquid inlet and the first liquid outlet are arranged on the raised portion, and the raised portion is located at the bottom of the water inlet and return portion and opposite to the water inlet and return portion.

[0012] In some embodiments, it also includes a first fixing member and a second fixing member, the frame is provided with a plurality of first fixing holes and a plurality of second fixing holes, the plurality of first fixing holes and the plurality of second fixing holes are arranged along the circumference of the frame, the plurality of first fixing holes surround the plurality of second fixing holes, the first fixing member is passed through the bottom plate and the first fixing hole, and the second fixing member is passed through the cooling plate and the second fixing hole.

[0013] In some embodiments, the battery pack is embedded in the frame by interference fit.

[0014] In some embodiments, the battery pack includes a plurality of battery cells, a side panel and an abutment portion, the plurality of battery cells are stacked along the thickness direction of the battery cells, the bottom walls of the plurality of battery cells are bonded to the cooling plate through the thermally conductive structural adhesive layer, the side panels are arranged on the battery cells on both sides of the battery pack in the stacking direction of the battery cells, the abutment portion is arranged on the side of the side panel facing the frame, and the abutment portion abuts against the frame.

[0015] In some embodiments, the abutment portion is an elastic structural member, the abutment portion and the side panel are arranged at an angle less than 90 degrees, and one end of the abutment portion facing away from the side panel extends in a direction away from the bottom panel, and the abutment portion is squeezed and deformed by the frame.

[0016] In some embodiments, an embracing piece is further included, wherein the embracing piece is detachably connected to the outer wall of the frame, and the embracing piece is a cast aluminum piece.

[0017] In some embodiments, the box body further includes a partition beam, which divides the cavity into a plurality of sub-cavities. The number of the battery packs is multiple, and the multiple battery packs are respectively arranged in the multiple sub-cavities, and the multiple battery packs are electrically connected to each other.

[0018] In a second aspect, based on the above battery pack, the present application also provides a car, including the above battery pack.

[0019] In the battery pack provided by the present application, the battery pack is arranged in the cavity of the box, so that the box can protect the battery pack, part of the frame is overlapped on the cooling plate, so that the cooling plate can bear the support frame, and the frame is also arranged on the bottom plate, so that the bottom plate can also be supported on the frame, so that the frame structure is stable. The cooling plate is located between the bottom plate and the frame, so that part of the cooling plate can be sandwiched by the bottom plate and the frame, so that the cooling plate can be more reliably fixed in the box, and the box and the cooling plate are more integrated and the structure is more compact. The coolant can enter the cooling channel through the first liquid inlet of the cooling plate and be discharged through the first liquid outlet. The battery pack is bonded to the cooling plate through the heat-conducting structural adhesive layer, so that the heat generated by the battery pack can be transferred to the cooling plate through the heat-conducting structural adhesive layer and absorbed by the coolant, so that the temperature of the battery pack can be reduced. The buffer layer between the cooling plate and the bottom plate can prevent the bottom plate from directly contacting the cooling plate, thereby preventing the bottom plate and the cooling plate from impacting each other and being damaged.

[0020] In the automobile proposed in the present application, the above-mentioned battery pack is applied, so the safety of the automobile is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other purposes, features and advantages of the embodiments of the present application will become more easily understood through the following detailed description with reference to the accompanying drawings. In the accompanying drawings, multiple embodiments of the present application will be described in an exemplary and non-limiting manner, wherein:

[0022] Figure 1 A schematic diagram of a battery pack according to an embodiment of the present application;

[0023] Figure 2 A schematic diagram of a cooling plate of a battery pack according to an embodiment of the present application;

[0024] Figure 3 A schematic diagram of the connection between a cooling plate and a frame of a battery pack according to an embodiment of the present application;

[0025] Figure 4 A schematic diagram of the connection between the bottom plate and the frame of the battery pack according to an embodiment of the present application;

[0026] Figure 5 A schematic diagram of a bottom side of a cooling plate of a battery pack according to an embodiment of the present application;

[0027] Figure 6 A schematic diagram of a battery pack of a battery pack according to an embodiment of the present application;

[0028] Figure 7 Schematic diagram of a connection row of a battery pack according to an embodiment of the present application.

[0029] Reference numerals:

[0030] 100-box, 110-bottom plate, 120-frame, 121-second liquid inlet, 122-second liquid outlet, 123-connecting ear, 130-upper cover, 140-partition beam, 150-cavity, 151-sub-cavity, 160-water inlet and return part, 170-water inlet nozzle, 180-water outlet nozzle, 190-first fixing member,

[0031] 200-cooling plate, 210-first liquid inlet, 220-first liquid outlet, 230-protrusion, 240-second fixing member,

[0032] 300-buffer layer,

[0033] 400-battery pack, 410-battery cell, 420-side plate, 430-abutment portion,

[0034] 500-thermal conductive structural adhesive layer,

[0035] 600-encircling pieces,

[0036] 700 - connection row, 710 - first connection part, 720 - second connection part, 730 - heat shrink tubing. DETAILED DESCRIPTION

[0037] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0040] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0042] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0043] In order to improve the integration efficiency of the battery module, the current battery module adopts a large module structure with multiple cells stacked, which can increase the capacity of the battery module. Correspondingly, the heat generated by the battery module during operation is relatively large, and the battery module needs to be cooled.

[0044] At present, the main way to dissipate heat for battery modules is to set a cooling plate, which is in contact with the bottom of the battery module so that the heat of the battery module can be transferred to the cooling plate. However, the current installation method of the cooling plate is to directly install it on the bottom plate of the battery pack box, resulting in poor connection reliability between the bottom plate and the box.

[0045] In the battery pack proposed in the present application, the battery pack is arranged in the cavity of the box, so that the box can protect the battery pack, part of the frame is overlapped on the cooling plate, so that the cooling plate can bear the support frame, and the frame is also arranged on the bottom plate, so that the bottom plate can also be supported on the frame, so that the frame structure is stable. The cooling plate is located between the bottom plate and the frame, so that part of the cooling plate can be sandwiched by the bottom plate and the frame, so that the cooling plate can be more reliably fixed in the box, and the box and the cooling plate are more integrated and the structure is more compact. The coolant can enter the cooling channel through the first liquid inlet of the cooling plate and be discharged through the first liquid outlet. The battery pack is bonded to the cooling plate through the heat-conducting structural adhesive layer, so that the heat generated by the battery pack can be transferred to the cooling plate through the heat-conducting structural adhesive layer and absorbed by the coolant, so that the temperature of the battery pack can be reduced. The buffer layer between the cooling plate and the bottom plate can prevent the bottom plate and the cooling plate from being directly in contact, thereby preventing the bottom plate and the cooling plate from being damaged by mutual impact.

[0046] In the automobile proposed in the present application, the above-mentioned battery pack is applied, so the safety of the automobile is improved.

[0047] The battery pack and the vehicle provided in this application are described in detail below in conjunction with specific embodiments.

[0048] The present application embodiment proposes a battery pack, referring to Figures 1 to 3 As shown, it includes a box body 100, a cooling plate 200, a battery pack and a buffer layer 300. The battery pack can be used in cars, and of course can also be used in other electrical devices, which is not limited in this application.

[0049] Among them, the box 100 is the basic component of the battery pack of the present application. The box 100 can provide an installation base for at least some of the other components of the battery pack and protect at least some of the other components. The box 100 can be made of metal material, so that the box 100 has better structural strength, thereby making the durability and reliability of the box 100 better. Of course, the box 100 can also be made of composite materials, so that the box 100 has a certain structural strength and is relatively light in insulation.

[0050] The box body 100 has a cavity 150, and the cavity 150 in the box body 100 can be used to install at least some other components of the battery pack. The box body 100 includes a bottom plate 110, a frame 120 and an upper cover 130. The bottom plate 110 is a plate-like structural member, the frame 120 is arranged at the edge of the bottom plate 110 along the circumference of the bottom plate 110, the upper cover 130 is arranged opposite to the bottom plate 110, and the upper cover 130 is connected to the frame 120, so that the frame 120 can be supported on the upper cover 130. The bottom plate 110, the frame 120 and the upper cover 130 can be arranged to form the cavity 150 of the box body 100.

[0051] It should be understood that when the battery pack 400 is continuously running, especially during the charging process of the battery pack 400, the battery pack 400 will generate a large amount of heat, which makes the temperature of the battery pack 400 high, thereby causing damage to the battery pack 400. In order to solve this problem, the cooling plate 200 of the present application can be arranged in the cavity 150 of the box body 100, and arranged on the bottom side of the battery pack 400. The cooling plate 200 can be supported on the battery pack 400 so that the cooling plate 200 contacts the bottom wall of the battery pack 400. Specifically, the cooling plate 200 is provided with a first liquid inlet 210 and a first liquid outlet 220 connected to both ends of the cooling channel. The first liquid inlet 210 and the first liquid outlet 220 can both be connected to the external coolant pipeline, so that the low-temperature coolant can enter the cooling channel through the first liquid inlet 210 and flow back to the external coolant pipeline through the first liquid outlet 220. When the low-temperature coolant flows through the cooling channel, the heat generated by the battery pack 400 can be transferred to the coolant through the cooling plate 200 to be absorbed by the coolant. After the coolant absorbs the heat of the battery pack 400, the temperature of the coolant increases. After the coolant flows back to the external coolant pipe to dissipate heat, it can form a low-temperature coolant again. The low-temperature coolant can flow into the cooling channel through the first liquid inlet 210 again to absorb the heat generated by the battery pack 400, thereby achieving the purpose of continuously dissipating heat from the battery pack 400.

[0052] When the battery pack of the present application is applied to an automobile, the first liquid inlet 210 and the first liquid outlet 220 of the cooling plate 200 may be connected to the cooling system of the automobile to input coolant into the cooling channel of the cooling plate 200 .

[0053] The cooling plate 200 can be arranged between the bottom plate 110 and the frame 120 of the box body 100, and part of the frame 120 can be overlapped on the cooling plate 200, so that the cooling plate 200 can be supported on the frame 120, and the frame 120 can press the cooling plate 200 on the bottom plate 110, so that the gap between the cooling plate 200 and the bottom plate 110 is smaller. In this way, the cooling plate 200 and the bottom plate 110 can be supported on the frame 120 at the same time, so that the frame 120 structure is more stable. The connection part of the bottom plate 110 and the frame 120 surrounds the connection part of the cooling plate 200 and the frame 120, so that the bottom plate 110 can surround the cooling plate 200 inside. Specifically, the orthographic projection of the cooling plate 200 toward the side of the bottom plate 110 can be located inside the bottom plate 110, and a mounting groove for accommodating the cooling plate 200 can be provided on the frame 120. The size of the mounting groove can be set to match the shape of the cooling plate 200, so that the inner wall of the mounting groove can limit the cooling plate 200. In this way, the edges of the bottom plate 110 and the cooling plate 200 can be connected to the outer side and the inner side of the bottom wall of the frame 120 respectively, so that the overall structural integrity of the cooling plate 200 disposed in the box 100 is better. In addition, the cooling plate 200 is embedded in the mounting groove structure of the bottom plate 110, and it can also avoid that the cooling plate 200 occupies additional space in the cavity 150 of the box 100, so that the size of the battery pack 400 that can be disposed in the cavity 150 of the box 100 is larger, and accordingly, the battery pack of the present application can have more power.

[0054] The buffer layer 300 may be disposed between the bottom plate 110 and the cooling plate 200, and opposite sides of the buffer layer 300 may be connected to the bottom plate 110 and the cooling plate 200, respectively. The buffer layer 300 may be an elastic shock-absorbing structural member, and the bottom plate 110 and the cooling plate 200 may be prevented from directly contacting each other by providing the buffer layer 300. When the bottom plate 110 or the cooling plate 200 is impacted, the buffer layer 300 may absorb the impact force, and prevent the bottom plate 110 and the cooling plate 200 from colliding with each other and being damaged. The buffer layer 300 may be made of silicone foam.

[0055] In some embodiments, the frame 120 of the present application may be configured to have a second liquid inlet 121 and a second liquid outlet 122, the first liquid inlet 210 of the cooling plate 200 is disposed at the bottom of the second liquid inlet 121 of the frame 120, and the first liquid inlet 210 is connected to the second liquid inlet 121. The first liquid outlet 220 of the cooling plate 200 is disposed at the bottom of the second liquid outlet of the frame 120, and the first liquid outlet 220 is connected to the second liquid outlet 122. The battery pack of the present application may also be configured to include a water inlet nozzle 170 and a water outlet nozzle 180, the water inlet nozzle 170 may be disposed on the frame 120 and connected to the second liquid inlet 121, and the water outlet nozzle 180 may be disposed on the frame 120 and connected to the second liquid outlet 122. The water inlet nozzle 170 and the water outlet nozzle 180 both have a pipe structure, and the external coolant pipeline can be connected to the water inlet nozzle 170 and the water outlet nozzle 180 respectively, so that the coolant can be input into the cooling channel of the cooling plate 200. The water inlet nozzle 170 and the water outlet nozzle 180 can be a curved pipe structure, which can facilitate the cooling plate 200 to communicate with the external cooling pipeline. The water inlet nozzle 170 and the water outlet nozzle 180 can be connected to the frame 120 in a detachable manner, so that the water inlet nozzle 170 and the water outlet nozzle 180 can be prepared separately and then installed with the frame 120. Specifically, the second liquid inlet 121 and the second liquid outlet 122 of the frame 120 can be provided with an internal thread, and the water inlet nozzle 170 and the water outlet nozzle 180 can be provided with an external thread, so that the water inlet nozzle 170 and the water outlet nozzle 180 can be threadedly connected to the frame 120.

[0056] In some embodiments, the frame 120 of the present application further has a water inlet and return portion 160 located on the outer wall of the frame 120, and the second liquid inlet 121 and the second liquid outlet 122 of the frame 120 are both arranged on the water inlet and return portion 160. Specifically, the water inlet and return portion 160 is a structural member arranged on the outer wall of the frame 120 and protruding from the outer wall of the frame 120, so that the water inlet and return portion 160 does not occupy the space in the cavity 150 of the box body 100, and accordingly, the volume of the battery pack 400 that can be arranged in the cavity 150 of the box body 100 is larger, so that the battery pack of the present application can provide more power. The edge of the cooling plate 200 has a raised portion 230, and the first liquid inlet 210 and the first liquid outlet 220 of the cooling plate 200 are arranged on the raised portion 230. The raised portion 230 is located on the bottom side of the water inlet and return portion 160 of the frame 120, so that the first liquid inlet 210 can be opposite to the second liquid inlet 121, and the first liquid outlet 220 can be opposite to the second liquid outlet 122.

[0057] In some embodiments, the battery pack of the present application may also be provided with a first fixing member 190 and a second fixing member 240, wherein the frame 120 is provided with a plurality of first fixing holes and a plurality of second fixing holes, the plurality of first fixing holes and the plurality of second fixing holes are all arranged along the circumference of the frame 120, and the plurality of first fixing holes surround the plurality of second fixing holes.

[0058] The bottom plate 110 may also be provided with a plurality of fixing hole structures corresponding to the first fixing holes of the frame 120, and the first fixing member 190 may be inserted through the first fixing holes of the frame 120 and the corresponding openings on the bottom plate 110, so that the fixing member can detachably connect and fix the bottom plate 110 to the frame 120. The cooling plate 200 may also be provided with a plurality of fixing hole structures corresponding to the second fixing holes of the frame 120, and the second fixing member 240 may be inserted through the first fixing holes of the frame 120 and the corresponding openings on the cooling plate 200, so that the fixing member can detachably connect and fix the cooling plate 200 to the frame 120. The first fixing member 190 and the second fixing member 240 may be bolts, and correspondingly, the first fixing hole and the second fixing hole may be screw holes.

[0059] In some embodiments, the battery pack 400 of the present application can be embedded in the cavity 150 of the case 100 by means of interference fit, and accordingly, at least part of the side wall of the battery pack 400 can be against the inner wall of the cavity 150, so that the friction between the side wall of the battery pack 400 and the inner wall of the cavity 150 can limit the battery pack 400 in the height direction, preventing the battery pack 400 from escaping from the cavity 150 of the case 100. In addition, the battery pack 400 is embedded in the cavity 150 of the case 100 by means of interference fit, and one side of the bottom of the battery pack 400 is bonded to the cooling plate 200 by the heat conductive structural adhesive layer 500, so that no other connection structure is required between the battery pack 400 and the case 100, thereby reducing the space of the cavity 150 of the case 100 occupied by other components.

[0060] Specifically, the battery pack 400 includes a plurality of battery cells 410, a side plate 420 and an abutment portion 430. The plurality of battery cells 410 can be stacked on the bottom plate 110 along the thickness direction of the battery cells 410, and the plurality of battery cells 410 are electrically connected so that the plurality of battery cells 410 can output electrical energy at the same time. The plurality of battery cells 410 are stacked along the thickness direction of the battery cells 410, so that the structure of the battery pack 400 is relatively more compact. Adjacent battery cells 410 can be bonded by an adhesive layer so that adjacent battery cells 410 can be fixed to each other. In this way, the plurality of battery cells 410 can be relatively fixed to form a battery pack 400 with a stable and reliable overall structure, so that the overall rigidity of the battery pack 400 is better. By fixing the battery cells 410 by the adhesive layer, it is not necessary to fix the battery cells 410 by other frame structures, so that the structure of the battery pack 400 is relatively more compact and the weight is relatively lighter. At the same time, the space of the cavity 150 of the box body 100 can be fully utilized, so that more battery packs 400 can be installed in the box body 100.

[0061] The side plates 420 are arranged on the battery cells 410 on both sides of the battery pack 400 in the stacking direction of the battery cells 410, that is, the two side plates 420 can be located on both sides of the stacking direction of the battery pack 400, and the two side plates 420 can sandwich multiple battery cells 410 between the two side plates 420. The abutment portion 430 is arranged on the side of the side plate 420 facing the frame 120, and the abutment portion 430 abuts against the inner wall of the frame 120, so that the battery pack 400 as a whole can be embedded in the cavity 150 of the box body 100 by interference fit.

[0062] Specifically, the side panels 420 can be buckled onto the large surfaces of the battery cells 410 on both sides of the battery pack 400, so that the connection between the side panels 420 and the battery cells 410 is stable and the connection between the two is simple. The side panels 420 and the abutting portions 430 can be made of polymer materials, and the abutting portions 430 and the side panels 420 can be an integrated structure, so that the connection reliability between the abutting portions 430 and the side panels 420 is better. Specifically, the side panels 420 and the abutting portions 430 can be prepared by an integrated injection molding process.

[0063] In some embodiments, the abutment portion 430 of the present application may be an elastic structural member, so that the abutment portion 430 can be deformed by force and form an elastic force. When the battery pack 400 is embedded in the cavity 150 of the box body 100 so that the abutment portion 430 abuts against the frame 120, the abutment portion 430 can be in a state of being deformed by force, so that the abutment portion 430 can have an elastic force, and the elastic force of the abutment portion 430 allows the abutment portion 430 to abut tightly against the frame 120, thereby making the friction between the battery pack 400 and the frame 120 greater.

[0064] The abutment portion 430 may be arranged to be arranged at an angle less than degrees with the side plate 420, and the side of the abutment portion 430 facing away from the side plate 420 may be arranged to extend in a direction facing away from the bottom plate 110. When the battery pack 400 is assembled in the cavity 150 of the box body 100, the upper cover 130 may be separated from the frame 120, so that the battery pack 400 is sunk from the top opening of the frame 120 into the cavity 150, and the abutment portion 430 may serve the purpose of guiding the battery pack 400. The frame 120 squeezes the abutment portion 430 so that the abutment portion 430 may be bent toward the side plate 420, so that the battery pack 400 may be completely embedded in the cavity 150 and fixed.

[0065] In some embodiments, the battery pack of the present application may also be provided with an embracing member 600, and the embracing member 600 may be detachably connected to the outer wall of the frame 120, so that the embracing member 600 is located outside the cavity 150 of the box body 100. The embracing member 600 may be made of cast aluminum, so that the embracing member 600 has better structural strength. When the battery pack of the present application is used in a car, the battery pack may be arranged so that the embracing member 600 faces the front of the car. When the car collides head-on, the embracing member 600 may absorb the impact energy and reduce the impact of the impact energy on the battery pack 400, so as to achieve the purpose of protecting the battery pack 400. Of course, the embracing member 600 may also be arranged to face the side or rear of the car, and this application does not limit this.

[0066] In some embodiments, the number of battery packs 400 in the present application can be set to multiple, and multiple battery packs 400 can also be electrically connected, specifically connected in series. Multiple battery packs 400 are all arranged in the cavity 150 of the box 100, so that the battery pack of the present application has a larger power supply and a better power supply effect. Specifically, the box 100 can also be provided with a partition beam 140. Among them, the partition beam 140 can be arranged in the box 100, and the partition beam 140 can divide the internal space of the box 100 into multiple relatively small spaces. The partition beam 140 is specifically arranged in the cavity 150 of the box 100 to divide the cavity 150 into multiple sub-cavities 151. Multiple battery packs 400 can be respectively arranged in multiple sub-cavities 151, so that the partition beam 140 can separate multiple battery packs 400, so that multiple battery packs 400 can be avoided from direct contact, so as to avoid multiple battery packs 400 from affecting each other.

[0067] The battery pack 400 can be connected to other electrical components of the battery pack or the electrical components of the vehicle through the connection bar 700. Of course, multiple battery packs 400 can also be connected through the connection bar 700. The connection bar 700 can be configured to include a first connection portion 710 and a second connection portion 720. The number of the first connection portions 710 is two. The two first connection portions 710 can be arranged on both sides of the second connection portion 720, and the two first connection portions 710 can be electrically connected to the second connection portion 720. The two first connection portions 710 can be electrically connected to the total output pole and the total input pole of the battery pack 400, and the second connection portion 720 can be electrically connected to an external electrical connection structure. A heat shrink sleeve 730 can be set on the second connection portion 720 to prevent the connection bar 700 from short-circuiting.

[0068] In addition, a plurality of connecting ears 123 may be provided on the frame 120 so that the box body 100 can be conveniently fixed to other components, such as being fixed inside a car.

[0069] Based on the above battery pack, an embodiment of the present application also proposes a car, including the above battery pack, which can be electrically connected to a battery power system, such as a motor, to provide electrical energy for the car.

[0070] Finally, it should be noted that the above implementation modes are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned implementation modes, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned implementation modes can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the implementation modes of the present application.

Claims

1. A battery pack, characterized in that: include: A box body (100), the box body (100) comprising a bottom plate (110), a frame (120) and an upper cover (130), the frame (120) being arranged at the edge of the bottom plate (110) along the circumference of the bottom plate (110), the upper cover (130) being connected to the frame (120) and opposite to the bottom plate (110), the bottom plate (110), the frame (120) and the upper cover (130) being arranged to form a cavity (150); A cooling plate (200) is arranged in the cavity (150), and the cooling plate (200) is located between the bottom plate (110) and the frame (120), a portion of the frame (120) is detachably overlapped on the cooling plate (200), a connection portion between the bottom plate (110) and the frame (120) surrounds a connection portion between the cooling plate (200) and the frame (120), and the cooling plate (200) is provided with a first liquid inlet (210), a first liquid outlet (220) and a cooling channel, and the first liquid inlet (210) and the first liquid outlet (220) are both in communication with the cooling channel; A buffer layer (300) is disposed between the bottom plate (110) and the cooling plate (200); The battery pack (400) is arranged on the cooling plate (200) and is bonded to the cooling plate (200) via a heat-conducting structural adhesive layer (500).

2. The battery pack according to claim 1, characterized in that: The invention also comprises a water inlet nozzle (170) and a water outlet nozzle (180); the frame (120) is provided with a second liquid inlet (121) and a second liquid outlet (122); the first liquid inlet (210) is located at the bottom of the second liquid inlet (121) and is in communication with the second liquid inlet (121); the first liquid outlet (220) is located at the bottom of the second liquid outlet (122) and is in communication with the second liquid inlet (121); the water inlet nozzle (170) is arranged on the frame (120) and is in communication with the second liquid inlet (121); the water outlet nozzle (180) is arranged on the frame (120) and is in communication with the second liquid outlet (122).

3. The battery pack according to claim 2, characterized in that: The frame (120) has a water inlet and return portion (160) located on the outer wall of the frame (120), the second liquid inlet (121) and the second liquid outlet (122) are opened in the water inlet and return portion (160), the edge of the cooling plate (200) has a protrusion (230), the first liquid inlet (210) and the first liquid outlet (220) are arranged on the protrusion (230), and the protrusion (230) is located at the bottom of the water inlet and return portion (160) and opposite to the water inlet and return portion (160).

4. The battery pack according to claim 1, characterized in that: It also includes a first fixing member (190) and a second fixing member (240), the frame (120) is provided with a plurality of first fixing holes and a plurality of second fixing holes, the plurality of first fixing holes and the plurality of second fixing holes are arranged along the circumference of the frame (120), the plurality of first fixing holes surround the plurality of second fixing holes, the first fixing member (190) is passed through the base plate (110) and the first fixing hole, and the second fixing member (240) is passed through the cooling plate (200) and the second fixing hole.

5. The battery pack according to claim 4, characterized in that: The battery pack (400) is embedded in the frame (120) by means of interference fit.

6. The battery pack according to claim 5, characterized in that: The battery pack (400) comprises a plurality of battery cells (410), a side plate (420) and an abutment portion (430); the plurality of battery cells (410) are stacked along the thickness direction of the battery cells (410); the bottom walls of the plurality of battery cells (410) are bonded to the cooling plate (200) via the heat-conductive structural adhesive layer (500); the side plates (420) are arranged on the battery cells (410) on both sides of the battery pack (400) in the stacking direction of the battery cells (410); the abutment portion (430) is arranged on a side of the side plate (420) facing the frame (120), and the abutment portion (430) abuts against the frame (120).

7. The battery pack according to claim 6, characterized in that: The abutting portion (430) is an elastic structural member, and is arranged at an angle less than 90 degrees with the side plate (420). One end of the abutting portion (430) facing away from the side plate (420) extends in a direction facing away from the bottom plate (110), and the abutting portion (430) is squeezed and deformed by the frame (120).

8. The battery pack according to any one of claims 1 to 7, characterized in that: It also includes an embracing piece (600), which is detachably connected to the outer wall of the frame (120), and the embracing piece (600) is a cast aluminum piece.

9. The battery pack according to any one of claims 1 to 7, characterized in that: The box body (100) further comprises a partition beam (140), wherein the partition beam (140) partitions the containing cavity (150) into a plurality of sub-cavities (151), the number of the battery packs (400) is plural, the plurality of battery packs (400) are respectively arranged in the plurality of sub-cavities (151), and the plurality of battery packs (400) are electrically connected to each other.

10. An automobile, characterized in that: A battery pack comprising the battery pack as claimed in any one of claims 1 to 9.

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