Battery pack and energy storage device

Abstract

The utility model provides a battery pack and energy storage device, the battery pack includes: battery cell, bearing piece and box body, the bearing piece is used for bearing battery cell, the bearing piece includes plate body, at least part of the peripheral side of plate body is bent to form the bending beam. The box body is provided with an accommodating cavity, and the battery cell is positioned in the accommodating cavity under the condition that the peripheral side of the box body is lapped on the bent beam.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage equipment, and in particular to a battery pack and an energy storage device. Background Art

[0002] In energy storage devices, in order to ensure the structural strength of the lower box of the battery pack, cross beams, longitudinal beams and other structures are installed on the lower box, resulting in more parts in the lower box. Utility Model Content

[0003] The utility model aims to solve one of the technical problems existing in the prior art or related technology.

[0004] In view of this, in the first aspect, the utility model proposes a battery pack, comprising: a battery cell; a carrier for supporting the battery cell, the carrier comprising a plate body, at least a portion of the outer peripheral side of the plate body is bent to form a bending beam; a box body, the box body is provided with a accommodating cavity, and the battery cell is located in the accommodating cavity when the outer peripheral side of the box body is overlapped on the bending beam.

[0005] The battery cell is placed on the carrier, and when the box is buckled on the carrier, the battery cell is located between the box and the carrier. When the box is buckled on the carrier, the outer peripheral side of the box overlaps the carrier. In order to prevent the carrier from deforming, the peripheral side of the carrier needs to be structurally strengthened.

[0006] At least a portion of the periphery of the plate body is bent so that a bending beam is formed on the periphery of the plate body. The bending beam can enhance the structural strength of the periphery of the support member. When the box body is overlapped on the bending beam, the bending beam is not easy to deform, so that the box body can be stably supported. Since the bending beam is formed by bending a part of the structure of the plate body itself, there is no need to fix an additional beam body to the support member, thereby reducing the number of parts and simplifying the structure of the battery pack. Moreover, since the bending beam is formed by bending a part of the structure of the plate body itself, the process is simple, and the bending beam is not easy to separate from the main structure of the plate body, the reliability of the support member is high and the cost is low. In addition, by reducing the number of parts of the battery pack, the energy density of the battery cell can be improved while keeping the overall weight of the battery pack basically unchanged.

[0007] In addition, the battery pack in the above technical solution provided by the utility model may also have the following additional technical features:

[0008] In some technical schemes, optionally, the bending beam includes: a first flange, a first side of the first flange is connected to the plate body, and the first flange is bent toward the first side of the plate body; a second flange, a first side of the second flange is connected to the second side of the first flange, an angle is provided between the second flange and the first flange, and the outer peripheral side of the box body is overlapped on the second flange; a third flange, a first side of the third flange is connected to the second side of the second flange, and the second side of the third flange is against the first side of the plate body.

[0009] The plate body is located at the outer peripheral side of the bending beam, the plate body and the bending beam are an integrally formed structure, the bent portion of the bearing member is the bending beam, and the unbent portion of the bearing member is the plate body.

[0010] The bending beam is a three-section structure, wherein the first flange is connected to the plate body, and the first flange is bent toward the first side of the plate body compared to the plate body, the second flange is connected to the first flange, and the second flange is bent compared to the first flange, so that the second flange is basically parallel to the plate body, and when the box body is overlapped on the second flange, the second flange can stably support the box body. The third flange is connected to the second flange, and the third flange is bent compared to the second flange, and the third flange is against the plate body, and the plate body supports the third flange, so that the third flange and the first flange can simultaneously support the second flange, ensuring the stability of the second flange supporting the box body.

[0011] A portion of the plate body is bent multiple times to form a bent beam with a multi-segment structure, which has a simple structure and is easy to form. It can avoid deformation of the bearing member when it is under pressure while reducing the number of parts.

[0012] In a possible application, the angle between the first flange and the plate body is a right angle, the angle between the second flange and the first flange is a right angle, and the angle between the third flange and the second flange is a right angle. When the third flange is against the plate body, there is an angle between the third flange and the plate body.

[0013] In some technical solutions, optionally, the second side of the third flange is welded and fixed to the first side of the plate body.

[0014] The third flange supports the second flange, and the structural stability of the third flange determines the support stability of the third flange on the second flange. When the second side of the third flange is connected to the plate body, the second side of the third flange is not easy to move relative to the body, thereby ensuring that the third flange will not move, and the third flange can stably support the second flange, which is conducive to improving the support stability of the second flange on the box body.

[0015] In some technical solutions, optionally, the carrier is provided with a liquid inlet, a liquid drain and a cooling channel, the first end of the cooling channel is connected to the liquid inlet, the second end of the cooling channel is connected to the liquid drain, and the coolant in the cooling channel is used to cool the battery cell.

[0016] The carrier is used to support the battery cell. The carrier is provided with a cooling channel. The cooling channel is used to pass the coolant. When the battery cell is placed on the carrier, the battery cell can exchange heat with the carrier due to the low temperature of the coolant. The coolant can take away the heat on the surface of the battery cell, thereby cooling the battery cell. The carrier is provided with a liquid inlet and a liquid outlet. The coolant can flow into the cooling channel from the liquid inlet, and the coolant can flow out of the cooling channel from the liquid outlet, so that the coolant can be in a flowing state in the cooling channel, thereby improving the heat dissipation effect on the battery cell.

[0017] In some technical schemes, optionally, the plate body has a first side and a second side, and the bending beam is located on the first side; the battery pack also includes: a support beam, which is connected to the plate body, and both ends of the support beam are against the bending beam. The outer peripheral side of the box body is overlapped on the bending beam and the support beam, and the support beam is spaced apart from the second side, and the liquid inlet and the liquid outlet are located between the support beam and the second side.

[0018] The outer periphery of the plate body is provided with a bending beam, and when the box body is assembled with the supporting member, the box body needs to be placed on the bending beam. In order to be able to connect the liquid inlet and the liquid discharge port to an external water source, the liquid inlet and the liquid discharge port need to be set at a position that is not blocked by the box body. Therefore, if bending beams are provided on all sides of the plate body, when the box body is overlapped on the bending beams, the liquid inlet and the liquid discharge port are built into the area surrounded by the bending beams, and it is difficult to connect the liquid inlet and the liquid discharge port to an external water source. Therefore, a bending beam is provided on the first side edge of the plate body, and no bending beam is provided on the second side edge of the plate body. Instead, an additional support beam is used together with the bending beam to support the box body. There is no bending beam on the second side of the plate body, and a certain distance is set between the support beam and the second side. When the box body is placed on the carrier, a certain distance is set between the box body and the second side. The box body does not block the position between the support beam and the second side, so that a liquid inlet and a liquid drain can be set between the support beam and the second side, which is convenient for connecting the liquid inlet and the liquid drain to an external water source.

[0019] In a possible application, the support beam is fixed to the plate body by welding, or the support beam is partially locked to the plate body by screws or the like.

[0020] In some technical solutions, optionally, the bending beam includes a first bending beam and a second bending beam, the length of the first bending beam is greater than the length of the second bending beam, and both ends of the supporting beam abut against the first bending beam.

[0021] The first bending beam and the second bending beam are arranged on different sides of the plate body, and the length of the first bending beam is greater than that of the second bending beam, so the first bending beam extends along the length direction of the plate body, and the second bending beam extends along the width direction of the plate body.

[0022] Since both ends of the support beam are against the first bending beam, the support beam extends along the width direction of the plate body, which can reduce the material usage of the support beam, which is beneficial to reducing the processing cost of the bearing member. In addition, the liquid inlet and the liquid outlet are arranged on the short side of the component, so that most of the space on the bearing member is opposite to the box body, which is beneficial to increase the space between the box body and the bearing member, and is beneficial to improve the space utilization rate.

[0023] In some technical solutions, optionally, the battery pack further includes: a seal, the bending beam and the support beam are located on a first side of the seal, the box is located on a second side of the seal, and the seal is used to seal the gap between the box and the carrier.

[0024] When the box body and the bearing member are installed, a sealing member needs to be provided between the box body and the bearing member to seal the box body and the bearing member.

[0025] Specifically, the seal can be placed on the bending beam and the supporting beam first, and then the outer peripheral side of the box can be placed on the seal, so that the bending beam and the supporting beam are used to clamp the seal with the box to prevent external impurities from entering between the box and the carrier, thereby improving the safety of battery cells and other devices.

[0026] Exemplarily, a locking member such as a screw is passed through the carrier and the sealing member, and the screw or other locking member is locked to the box body, so that the box body and the carrier clamp the sealing member, thereby improving the sealing effect between the box body and the carrier.

[0027] In some technical solutions, optionally, the support also includes: a bottom plate connected to the plate body, forming a cooling channel between the bottom plate and the plate body; reinforcing ribs connected to the bottom plate, and the reinforcing ribs are distributed along the length direction and / or width direction of the bottom plate.

[0028] The bearing member includes a plate body and a base plate. A groove structure is formed on the plate body and / or the base plate. When the plate body is fixed to the base plate, the groove structure is covered to form a cooling channel between the plate body and the base plate.

[0029] In this embodiment, the plate body and the bottom plate are stamped plates, and in other embodiments, other processes such as inflation can also be used to achieve the plate body and the bottom plate can be fixed by brazing.

[0030] Reinforcement ribs are installed on the bottom plate to increase the structural stability of the bottom plate and prevent the bottom plate from deforming, thereby preventing the cooling channel from deforming and ensuring that the coolant can flow stably in the cooling channel.

[0031] The reinforcing ribs may extend along the length direction or the width direction of the bearing member, or a portion of the reinforcing ribs may extend along the length direction of the bearing member and another portion of the reinforcing ribs may extend along the width direction of the bearing member.

[0032] In some technical solutions, optionally, the battery pack further includes: a locking member for locking the reinforcing rib to the bottom plate; and / or the reinforcing rib is welded and fixed to the bottom plate.

[0033] The reinforcing ribs can be fixed to the bottom plate by a locking member or by welding, thereby preventing the reinforcing ribs from being separated from the bottom plate and ensuring that the reinforcing ribs can stably support the bottom plate.

[0034] Of course, in order to improve the overall strength, the reinforcing ribs may be first locked to the base plate by means of locking pieces, and then resistance welding may be performed at multiple locations between the reinforcing ribs and the base plate to further improve the connection stability between the reinforcing ribs and the base plate.

[0035] In some technical solutions, optionally, the battery pack further includes: a positioning beam connected to the carrier, and the side of the battery cell abuts against the positioning beam.

[0036] A positioning beam is installed on the carrier, which plays a role in positioning and limiting the battery cell, avoiding displacement and shaking of the battery relative to the carrier, which is beneficial to improving the installation stability of the battery cell.

[0037] In some technical solutions, optionally, there are multiple battery cells, and the multiple battery cells are stacked along a first direction; along the first direction, a plurality of positioning beams are provided on the carrier, and the multiple battery cells are located between two adjacent positioning beams.

[0038] The multiple battery cells are stacked along a first direction, and the multiple battery cells are located between two adjacent positioning beams. The two adjacent positioning beams limit the multiple battery cells to avoid separation of the two adjacent battery cells, thereby ensuring the operation stability of the multiple battery cells.

[0039] In a second aspect, the utility model proposes an energy storage device, including a battery pack as in any of the above technical solutions.

[0040] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0042] Figure 1 An exploded view of a battery pack in an embodiment of the present utility model is shown;

[0043] Figure 2 A schematic diagram showing the structure of the plate body and the bending beam in the embodiment of the utility model is shown;

[0044] Figure 3 Shows Figure 2 The enlarged view of point A in the middle;

[0045] Figure 4 A schematic structural diagram of a bearing member in an embodiment of the utility model is shown;

[0046] Figure 5 A schematic diagram showing the structure of a support beam and an unbent plate in an embodiment of the utility model is shown;

[0047] Figure 6 An exploded view of a bearing member in an embodiment of the utility model is shown;

[0048] Figure 7 The schematic diagram of the structure of the bottom plate and the reinforcing ribs in the embodiment of the utility model is shown.

[0049] Reference numerals:

[0050] 100 battery cell, 200 carrier, 210 bending beam, 211 first flange, 212 second flange, 213 third flange, 214 first bending beam, 215 second bending beam, 220 plate, 231 liquid inlet, 232 liquid outlet, 233 cooling channel, 240 first side, 250 second side, 260 bottom plate, 270 reinforcing rib, 300 box, 400 support beam, 500 seal, 600 locking piece, 700 positioning beam, 800 locking piece. DETAILED DESCRIPTION

[0051] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0052] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0053] Refer to the following Figures 1 to 7 A battery pack and an energy storage device are described according to some embodiments of the present invention.

[0054] Combination Figure 1 and Figure 2As shown, in an embodiment of the utility model, a battery pack is proposed, including: a battery cell 100, a carrier 200 and a box 300, the carrier 200 is used to support the battery cell 100, the carrier 200 includes a plate 220, at least a portion of the outer peripheral side of the plate 220 is bent to form a bending beam 210. The box 300 is provided with a receiving cavity, and when the outer peripheral side of the box 300 is overlapped on the bending beam 210, the battery cell 100 is located in the receiving cavity.

[0055] The battery cell 100 is placed on the carrier 200. When the box 300 is buckled on the carrier 200, the battery cell 100 is located between the box 300 and the carrier 200. When the box 300 is buckled on the carrier 200, the outer peripheral side of the box 300 overlaps the carrier 200. In order to prevent the carrier 200 from deforming, the peripheral side of the carrier 200 needs to be structurally reinforced.

[0056] At least a portion of the periphery of the plate body 220 is bent, so that the periphery of the plate body 220 forms a bending beam 210, and the bending beam 210 can enhance the structural strength of the periphery of the carrier 200. When the box body 300 is overlapped on the bending beam 210, the bending beam 210 is not easy to deform, so that the box body 300 can be stably supported. Since the bending beam 210 is formed by bending a part of the structure of the plate body 220 itself, it is not necessary to fix an additional beam body to the carrier 200, thereby reducing the number of parts and simplifying the structure of the battery pack. Moreover, since the bending beam 210 is formed by bending a part of the structure of the plate body 220 itself, the process is simple, and the bending beam 210 is not easy to separate from the main structure of the plate body 220, the reliability of the carrier 200 is high and the cost is low. In addition, by reducing the number of parts of the battery pack, the energy density of the battery cell 100 can be improved while keeping the overall weight of the battery pack basically unchanged.

[0057] By directly forming the bending beam 210 on the carrier 200, the number of welding spots on the carrier 200 can be reduced, the process is simple, and reducing the number of welding spots can also improve the reliability of the carrier 200, and can also reduce the cost of welding, riveting of parts, etc. The battery pack is light in weight, the cost is reduced, and the energy density of the battery cell 100 is improved.

[0058] In a possible application, the bent beam 210 is formed by bending or rolling.

[0059] Combination Figure 2 and Figure 3As shown, in some embodiments, optionally, the bending beam 210 includes: a first flange 211, a second flange 212 and a third flange 213, the first side of the first flange 211 is connected to the plate 220, the first flange 211 is bent toward the first side of the plate 220, the first side of the second flange 212 is connected to the second side of the first flange 211, an angle is provided between the second flange 212 and the first flange 211, and the outer peripheral side of the box body 300 is overlapped on the second flange 212. The first side of the third flange 213 is connected to the second side of the second flange 212, and the second side of the third flange 213 is against the first side of the plate 220.

[0060] The plate body 220 is located on the outer peripheral side of the bending beam 210 . The plate body 220 and the bending beam 210 are an integrally formed structure. The bent portion of the carrier 200 is the bending beam 210 , and the unbent portion of the carrier 200 is the plate body 220 .

[0061] The bending beam 210 is a three-section structure, wherein the first flange 211 is connected to the plate body 220, and the first flange 211 is bent toward the first side of the plate body 220 compared to the plate body 220, and the second flange 212 is connected to the first flange 211, and the second flange 212 is bent compared to the first flange 211, so that the second flange 212 and the plate body 220 are basically in a parallel state. When the box body 300 is overlapped on the second flange 212, the second flange 212 can stably support the box body 300. The third flange 213 is connected to the second flange 212, and the third flange 213 is bent compared to the second flange 212. The third flange 213 rests on the plate 220, and the plate 220 supports the third flange 213, so that the third flange 213 and the first flange 211 can support the second flange 212 at the same time, ensuring the supporting stability of the second flange 212 on the box body 300.

[0062] A portion of the plate 220 is bent multiple times to form a multi-segment structured bent beam 210 , which has a simple structure and is easy to form. It can reduce the number of components and prevent the bearing member 200 from being deformed when under pressure.

[0063] In a possible application, the angle between the first flange 211 and the plate body 220 is a right angle, the angle between the second flange 212 and the first flange 211 is a right angle, and the angle between the third flange 213 and the second flange 212 is a right angle. When the third flange 213 is against the plate body 220, there is an angle between the third flange 213 and the plate body 220.

[0064] In this embodiment, the bending beam 210 is bent toward the first side of the plate body 220 . In other embodiments, the bending beam 210 may also be bent toward the second side of the plate body 220 . The second side of the plate body 220 is the side of the plate body 220 away from the battery cell 100 .

[0065] In some embodiments, optionally, the second side of the third flange 213 is fixed to the first side of the plate body 220 by welding.

[0066] The third flange 213 supports the second flange 212, and the structural stability of the third flange 213 determines the support stability of the third flange 213 on the second flange 212. When the second side of the third flange 213 is connected to the plate 220, the second side of the third flange 213 is not easy to move relative to the body, thereby ensuring that the third flange 213 will not move, and the third flange 213 can stably support the second flange 212, which is conducive to improving the support stability of the second flange 212 on the box 300.

[0067] In other embodiments, components such as screws may be used to lock the second side of the third flange 213 to the plate body 220 .

[0068] Combination Figure 1 and Figure 6 As shown, in some embodiments, optionally, the carrier 200 is provided with a liquid inlet 231, a liquid discharge port 232 and a cooling channel 233, the first end of the cooling channel 233 is connected to the liquid inlet 231, the second end of the cooling channel 233 is connected to the liquid discharge port 232, and the coolant in the cooling channel 233 is used to cool the battery cell 100.

[0069] The carrier 200 is used to support the battery cell 100. The carrier 200 is provided with a cooling channel 233. The cooling channel 233 is used to pass the coolant. When the battery cell 100 is placed on the carrier 200, the battery cell 100 can exchange heat with the carrier 200 due to the low temperature of the coolant. The coolant can take away the heat on the surface of the battery cell 100, thereby achieving cooling of the battery cell 100. The carrier 200 is provided with a liquid inlet 231 and a liquid outlet 232. The coolant can flow into the cooling channel 233 from the liquid inlet 231, and the coolant can flow out of the cooling channel 233 from the liquid outlet 232, so that the coolant can be in a flowing state in the cooling channel 233, thereby improving the heat dissipation effect on the battery cell 100.

[0070] Combination Figure 4 and Figure 5 As shown, in some embodiments, optionally, the plate body 220 has a first side 240 and a second side 250, and the bending beam 210 is located at the first side 240. The battery pack further includes: a support beam 400, the support beam 400 is connected to the plate body 220, both ends of the support beam 400 are against the bending beam 210, the outer peripheral side of the box body 300 is overlapped on the bending beam 210 and the support beam 400, the support beam 400 and the second side 250 are spaced apart, and the liquid inlet 231 and the liquid outlet 232 are located between the support beam 400 and the second side 250.

[0071] It should be noted that, in order to facilitate the description of the structure of the plate body 220, Figure 5 The first side edge 240 of the middle plate body 220 is in an unbent state.

[0072] The outer periphery of the plate body 220 is provided with a bending beam 210. When the box body 300 is assembled with the carrier 200, the box body 300 needs to be placed on the bending beam 210. In order to connect the liquid inlet 231 and the liquid outlet 232 to an external water source, the liquid inlet 231 and the liquid outlet 232 need to be set at a position not blocked by the box body 300. Therefore, if the bending beams 210 are set on all four sides of the plate body 220, when the box body 300 is overlapped on the bending beam 210, the liquid inlet 231 and the liquid outlet 232 are built in the area surrounded by the bending beam 210, and it is difficult to connect the liquid inlet 231 and the liquid outlet 232 to an external water source. Therefore, a bending beam 210 is provided on the first side 240 of the plate body 220, and no bending beam 210 is provided on the second side 250 of the plate body 220. Instead, an additional support beam 400 is used together with the bending beam 210 to support the box body 300. The second side 250 of the plate body 220 is not provided with a bending beam 210, and a certain distance is set between the support beam 400 and the second side 250. When the box body 300 is placed on the carrier 200, a certain distance is set between the box body 300 and the second side 250, and the box body 300 does not block the position between the support beam 400 and the second side 250, so that the liquid inlet 231 and the liquid outlet 232 can be provided between the support beam 400 and the second side 250, so that the liquid inlet 231 and the liquid outlet 232 can be conveniently connected to an external water source.

[0073] In a possible application, the support beam 400 is fixed to the plate body 220 by welding, or the support beam 400 is locked to the plate body 220 by means of screws or other components.

[0074] like Figure 4 As shown, in some embodiments, optionally, the bending beam 210 includes a first bending beam 214 and a second bending beam 215 , the length of the first bending beam 214 is greater than the length of the second bending beam 215 , and both ends of the support beam 400 abut against the first bending beam 214 .

[0075] The first bending beam 214 and the second bending beam 215 are arranged on different sides of the plate body 220, and the length of the first bending beam 214 is greater than the length of the second bending beam 215, so the first bending beam 214 extends along the length direction of the plate body 220, and the second bending beam 215 extends along the width direction of the plate body 220.

[0076] Since both ends of the support beam 400 are against the first bending beam 214, the support beam 400 extends along the width direction of the plate body 220, which can reduce the material usage of the support beam 400, which is beneficial to reducing the processing cost of the carrier 200. In addition, the liquid inlet 231 and the liquid outlet 232 are arranged on the short side of the component, so that most of the space on the carrier 200 is opposite to the box body 300, which is beneficial to increase the space between the box body 300 and the carrier 200, which is beneficial to improve the space utilization rate.

[0077] like Figure 6 As shown, in some embodiments, optionally, the battery pack further includes: a seal 500, the bending beam 210 and the support beam 400 are located on a first side of the seal 500, the box body 300 is located on a second side of the seal 500, and the seal 500 is used to seal the gap between the box body 300 and the carrier 200.

[0078] When the box body 300 and the carrier 200 are installed, a sealing member 500 needs to be provided between the box body 300 and the carrier 200 for sealing the box body 300 and the carrier 200 .

[0079] Specifically, the seal 500 can be placed on the bending beam 210 and the support beam 400 first, and then the outer peripheral side of the box body 300 can be placed on the seal 500, so that the bending beam 210 and the support beam 400 are used to clamp the seal 500 with the box body 300 to prevent external impurities from entering between the box body 300 and the carrier 200, thereby improving the safety of use of devices such as the battery cell 100.

[0080] Exemplarily, a locking member 800 such as a screw passes through the carrier 200 and the sealing member 500 and is locked to the box body 300 , so that the box body 300 and the carrier 200 clamp the sealing member 500 , thereby improving the sealing effect between the box body 300 and the carrier 200 .

[0081] Combination Figure 6 and Figure 7 As shown, in some embodiments, optionally, the bearing member 200 further includes: a bottom plate 260 and a reinforcing rib 270, the bottom plate 260 is connected to the plate body 220, and a cooling channel 233 is formed between the bottom plate 260 and the plate body 220. The reinforcing rib 270 is connected to the bottom plate 260, and the reinforcing rib 270 is distributed along the length direction and / or width direction of the bottom plate 260.

[0082] The carrier 200 includes a plate body 220 and a base plate 260 . A groove structure is formed on the plate body 220 and / or the base plate 260 . When the plate body 220 is fixed on the base plate 260 , the groove structure is covered, thereby forming a cooling channel 233 between the plate body 220 and the base plate 260 .

[0083] In this embodiment, the plate body 220 and the bottom plate 260 are stamped plates. In other embodiments, other processes such as inflation can also be used. The plate body 220 and the bottom plate 260 can be fixed by brazing.

[0084] A reinforcing rib 270 is installed on the bottom plate 260 , and the reinforcing rib 270 is used to increase the structural stability of the bottom plate 260 , prevent the bottom plate 260 from deforming, thereby preventing the cooling channel 233 from deforming, and ensure that the coolant can flow stably in the cooling channel 233 .

[0085] The reinforcing ribs 270 may extend along the length direction or the width direction of the carrier 200 , or a portion of the reinforcing ribs 270 may extend along the length direction of the carrier 200 , and another portion of the reinforcing ribs 270 may extend along the width direction of the carrier 200 .

[0086] In this embodiment, a flange (bending beam 210) is added to the carrier 200 to form a certain structure, which plays the role of the longitudinal and transverse beams of the battery pack in the related technology. The entire carrier 200 is reinforced by several reinforcing ribs 270 at the bottom to play a better force-bearing role.

[0087] In the above embodiment, the bending beam 210 is arranged on the plate body 220, that is, a part of the plate body 220 is bent to form the bending beam 210. In other embodiments, the bending beam 210 can also be arranged on the bottom plate 260, and the bending beam 210 is bent toward the battery cell 100, or is bent away from the battery cell 100, or the bending beam 210 is arranged on both the plate body 220 and the bottom plate 260. The above methods all fall within the protection scope of the present utility model.

[0088] like Figure 6 As shown, in some embodiments, optionally, the battery pack further includes: a locking member 600 , the locking member 600 is used to lock the reinforcing rib 270 to the bottom plate 260 , and / or the reinforcing rib 270 is welded and fixed to the bottom plate 260 .

[0089] The reinforcing rib 270 can be fixed to the bottom plate 260 by a locking member 600 or by welding, thereby preventing the reinforcing rib 270 from separating from the bottom plate 260 and ensuring that the reinforcing rib 270 can stably support the bottom plate 260 .

[0090] Of course, in order to improve the overall strength, the reinforcing rib 270 can also be locked to the bottom plate 260 by the locking piece 600, and then resistance welding is performed at multiple positions between the reinforcing rib 270 and the bottom plate 260 to further improve the connection stability between the reinforcing rib 270 and the bottom plate 260.

[0091] Exemplarily, the locking member 600 is a bolt or a rivet.

[0092] In a possible application, the locking member 600 passes through the reinforcing rib 270 , the bottom plate 260 , and the sealing member 500 , and then is locked to the plate body 220 , thereby using one locking member 600 to simultaneously connect the reinforcing rib 270 , the bottom plate 260 , the sealing member 500 , and the plate body 220 .

[0093] Combination Figure 4 and Figure 6 As shown, in some embodiments, optionally, the battery pack further includes: a positioning beam 700 , the positioning beam 700 is connected to the carrier 200 , and the side of the battery cell 100 abuts against the positioning beam 700 .

[0094] A positioning beam 700 is installed on the carrier 200 , and the positioning beam 700 plays a role in positioning and limiting the battery cell 100 , thereby preventing the battery cell from being displaced and shaken relative to the carrier 200 , and is beneficial to improving the installation stability of the battery cell 100 .

[0095] Combination Figure 1 and Figure 4 As shown, in some embodiments, optionally, the number of the battery cells 100 is multiple, and the multiple battery cells 100 are arranged along the first direction ( Figure 1 Along the first direction, a plurality of positioning beams 700 are disposed on the carrier 200, and a plurality of battery cells 100 are located between two adjacent positioning beams 700.

[0096] The multiple battery cells 100 are stacked along the first direction and are located between two adjacent positioning beams 700 . The two adjacent positioning beams 700 limit the multiple battery cells 100 to prevent the two adjacent battery cells 100 from being separated, thereby ensuring the operating stability of the multiple battery cells 100 .

[0097] In an embodiment of the present utility model, an energy storage device is proposed, including a battery pack as in any of the above embodiments, and can achieve the same technical effects, which will not be described in detail here.

[0098] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0099] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", 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 utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0100] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery pack, characterized in that: include: Battery cells; A carrier, used for supporting the battery cell, the carrier comprising a plate, at least a portion of the outer circumference of the plate is bent to form a bent beam; A box body is provided with a containing cavity, the outer peripheral side of the box body is overlapped on the bending beam, and the battery cell is located in the containing cavity.

2. The battery pack according to claim 1, characterized in that: The bending beam comprises: A first flange, wherein a first side of the first flange is connected to the plate body, and the first flange is bent toward the first side of the plate body; A second flange, wherein a first side of the second flange is connected to a second side of the first flange, an angle is provided between the second flange and the first flange, and the outer peripheral side of the box body overlaps the second flange; A third flange, wherein a first side of the third flange is connected to a second side of the second flange, and the second side of the third flange is against the first side of the plate body.

3. The battery pack according to claim 2, characterized in that: The second side of the third flange is welded and fixed to the first side of the plate body.

4. The battery pack according to claim 2 or 3, characterized in that: The carrier is provided with a liquid inlet, a liquid outlet and a cooling channel, the first end of the cooling channel is connected to the liquid inlet, the second end of the cooling channel is connected to the liquid outlet, and the coolant in the cooling channel is used to cool the battery cell.

5. The battery pack according to claim 4, characterized in that: The bearing member has a first side and a second side, and the first side is bent to form the bent beam; The battery pack further comprises: A support beam is connected to the plate body, both ends of the support beam are against the bending beam, the outer peripheral side of the box body is overlapped on the bending beam and the support beam, the support beam is spaced apart from the second side edge, and the liquid inlet and the liquid outlet are located between the support beam and the second side edge.

6. The battery pack according to claim 5, characterized in that: The bending beam comprises a first bending beam and a second bending beam, the length of the first bending beam is greater than the length of the second bending beam, and both ends of the supporting beam abut against the first bending beam.

7. The battery pack according to claim 5, characterized in that: The battery pack further comprises: A sealing member, wherein the bending beam and the supporting beam are located on a first side of the sealing member, the box body is located on a second side of the sealing member, and the sealing member is used to seal a gap between the box body and the bearing member.

8. The battery pack according to claim 4, characterized in that: The carrier also includes: A bottom plate connected to the plate body, wherein the cooling channel is formed between the bottom plate and the plate body; The reinforcing ribs are connected to the bottom plate, and the reinforcing ribs are distributed along the length direction and / or width direction of the bottom plate.

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises: a locking member for locking the reinforcing rib to the bottom plate; and / or The reinforcing ribs are welded and fixed to the bottom plate.

10. The battery pack according to any one of claims 1 to 3, characterized in that: The battery pack further comprises: A positioning beam is connected to the bearing member, and the side of the battery cell abuts against the positioning beam.

11. The battery pack according to claim 10, characterized in that: There are multiple battery cells, and the multiple battery cells are stacked along a first direction; Along the first direction, a plurality of the positioning beams are disposed on the carrier, and a plurality of the battery cells are located between two adjacent positioning beams.

12. An energy storage device, characterized in that: include: A battery pack as claimed in any one of claims 1 to 11.

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