Battery pack and electric device

Abstract

The utility model discloses a battery pack and a power utilization device, and belongs to the technical field of battery packs. Comprising a plurality of battery cells and a support, the support comprises a bearing plate, a first reinforcing plate, a second reinforcing plate and a third reinforcing plate, and the bearing plate is provided with a first end face and a second end face; the first reinforcing plate, the second reinforcing plate and the third reinforcing plate extend in the third direction and are connected to the first end face. In the first direction, the second reinforcing plate is arranged between the first reinforcing plate and the third reinforcing plate, and the first reinforcing plate, the second reinforcing plate and the third reinforcing plate are arranged at intervals; and in the third direction, the battery cell is propped against the second end surface, or the battery cell is propped against at least two of the second reinforcing plate, the first reinforcing plate and the third reinforcing plate. The cross section of the bracket is E-shaped, and the E-shaped bracket can decompose an external force and then transmit the external force to the battery cell when the bracket is subjected to the external force, so that the force can be fully released to protect the battery cell.

Description

Technical Field

[0001] This application belongs to the technical field of batteries, and particularly relates to a battery pack and an electrical device. Background Art

[0002] With the rapid development of battery packs, the requirements for the safety performance of battery packs are also getting higher and higher.

[0003] In related technologies, as the power source of a vehicle, a battery pack is commonly used in vehicles such as electric vehicles and electric bicycles. In an electric vehicle, for the convenience of assembly, the battery pack is usually installed at the bottom of the electric vehicle.

[0004] However, during the actual driving process of an electric vehicle, the conditions at the bottom of the vehicle are extremely complex. When passing over a pothole, a protrusion, or a rocky road surface, the bottom of the vehicle is extremely vulnerable to impacts and scratches. The impact force during the impact will pose a safety hazard to the battery pack. When the impact force is too large, it is easy to cause damage to the battery pack, which will not only reduce the service life of the battery pack, but also may cause the battery pack to experience thermal runaway, thereby affecting the personal safety of the passengers and drivers. Summary of the Utility Model

[0005] The purpose of the embodiments of this application is to provide a battery pack and an electrical device, which can solve the problem in the prior art that the external force damages the battery cells, resulting in thermal runaway of the battery pack and affecting the personal safety of the passengers and drivers.

[0006] To solve the above technical problems, this application is implemented as follows:

[0007] In a first aspect, the embodiments of this application provide a battery pack having an intersecting first direction and third direction, including: a plurality of battery cells; a bracket, the bracket including: a bearing plate, a first reinforcing plate, a second reinforcing plate, and a third reinforcing plate, the bearing plate having a first end face and a second end face oppositely arranged along the third direction; the first reinforcing plate, the second reinforcing plate, and the third reinforcing plate all extend along the third direction, and the first reinforcing plate, the second reinforcing plate, and the third reinforcing plate are all connected to the first end face; along the first direction, the second reinforcing plate is disposed between the first reinforcing plate and the third reinforcing plate, and the first reinforcing plate, the second reinforcing plate, and the third reinforcing plate are all spaced apart; along the third direction, the battery cell abuts against the second end face, or the battery cell abuts against at least two of the second reinforcing plate, the first reinforcing plate, and the third reinforcing plate.

[0008] Beneficial effects: The bracket is connected to the battery cell to provide support force and set the position for the battery cell in the battery pack. Specifically, the battery cell can abut against the second end face, or the battery cell can also abut against both the first reinforcing plate and the second reinforcing plate, or the battery cell can also abut against both the second reinforcing plate and the third reinforcing plate, or the battery cell can also abut against both the first reinforcing plate and the third reinforcing plate, or the battery cell can also abut against the first reinforcing plate, the second reinforcing plate and the third reinforcing plate. The cross-section of the bracket with the bearing plate, the first reinforcing plate, the second reinforcing plate and the third reinforcing plate is in the shape of a "mountain". When the "mountain"-shaped bracket is subjected to an external force, the external force can be decomposed and then transmitted to the battery cell connected to the bracket. The entire "mountain"-shaped bracket disperses the force, which can play a sufficient role in unloading the force to protect the battery cell.

[0009] In the case where the battery cell abuts against the first end face, the first reinforcing plate, the second reinforcing plate and the third reinforcing plate are all connected to the box body of the battery pack. When the battery pack is subjected to an external impact, the impact force is transmitted to the bracket through the battery box body. The impact force is first transmitted to the first reinforcing plate, the second reinforcing plate and the third reinforcing plate connected to the box body, then transmitted to the bearing plate, and then transmitted to the battery cell. In the embodiment of the present application, when the impact force is transmitted to the bracket, the settings of the first reinforcing plate, the second reinforcing plate and the third reinforcing plate decompose the impact force, so that the entire bracket disperses the force, reducing the impact of the impact force on the bracket. When the decomposed impact force is transmitted to the battery cell through the bearing plate again, the impact on the battery cell is also reduced, thereby having the beneficial effect of protecting the battery cell and improving the safety of the battery pack.

[0010] In the case where the battery cell abuts against both the first reinforcing plate and the second reinforcing plate, the second end face of the bearing plate is connected to the box body of the battery pack. When the battery pack is subjected to an external impact, the impact force is transmitted to the bracket through the battery pack. The impact force is first transmitted to the bearing plate connected to the box body, then transmitted to the first reinforcing plate and the second reinforcing plate, and then transmitted to the battery cell. In the embodiment of the present application, after the impact force is transmitted to the bearing plate and then transmitted to the first reinforcing plate and the second reinforcing plate, the settings of the first reinforcing plate and the second reinforcing plate decompose the impact force, so that the entire bracket disperses the force, reducing the impact of the impact force on the bracket, and thus also reducing the impact on the battery cell connected to the first reinforcing plate and the second reinforcing plate, thereby having the beneficial effect of protecting the battery cell and improving the safety of the battery pack.

[0011] It should be noted that in the case where the battery cell abuts against the second reinforcing plate and the third reinforcing plate, or in the case where the battery cell abuts against both the first reinforcing plate and the third reinforcing plate, or in the case where the battery cell abuts against the first reinforcing plate, the second reinforcing plate and the third reinforcing plate. The external impact on the battery pack is similar to the external force on the battery cell in the case where the battery cell abuts against both the first reinforcing plate and the second reinforcing plate, and will not be elaborated here.

[0012] Optionally, in an embodiment of the present application, the first reinforcing plate includes a first connecting portion and a first boss; along the third direction, one end of the first connecting portion facing away from the first boss is connected to the first end surface, and the other end of the first connecting portion close to the first boss is connected to the first boss, and the battery cell abuts against the first boss; the first boss protrudes along the first direction and is arranged on the first connecting portion.

[0013] Optionally, in an embodiment of the present application, along the third direction, a first glue groove is formed on a side of the first boss away from the first end face, and the first glue groove is recessed in a direction close to the first end face.

[0014] Optionally, in an embodiment of the present application, the battery pack also has a second direction, the first direction, the second direction and the third direction intersect each other, the first connection portion extends along the second direction, and the first reinforcement plate also includes a first reinforcement rib; the first reinforcement rib is connected to the side of the first connection portion facing the second reinforcement plate.

[0015] Optionally, in an embodiment of the present application, the second reinforcing plate includes a second connecting portion and a second boss; along the third direction, one end of the second connecting portion facing away from the second boss is connected to the first end surface, and the other end of the second connecting portion close to the second boss is connected to the second boss, and the battery cell abuts against the second boss; the second boss protrudes along the first direction and is arranged on the second connecting portion.

[0016] Optionally, in an embodiment of the present application, a second glue groove is formed on a side of the second boss facing away from the first end face, and the second glue groove is recessed along the third direction toward the first end face.

[0017] Optionally, in an embodiment of the present application, the third reinforcing plate includes a third connecting portion and a third boss; along the third direction, one end of the third connecting portion facing away from the third boss is connected to the first end surface, and the other end of the third connecting portion close to the third boss is connected to the third boss, and the battery cell abuts against the third boss; the third boss protrudes along the first direction and is arranged on the third connecting portion.

[0018] Optionally, in an embodiment of the present application, it also includes an auxiliary support plate, which extends along the third direction, and the auxiliary support plate is connected to the first end face. Along the first direction, the auxiliary support plate is arranged between the first reinforcing plate and the second reinforcing plate, or the auxiliary support plate is arranged between the second reinforcing plate and the third reinforcing plate; the auxiliary support plate is spaced apart from the first reinforcing plate, the second reinforcing plate and the third reinforcing plate.

[0019] Optionally, in the embodiments of the present application, the number of the first reinforcing plates is plural, and the plural first reinforcing plates are all connected to the first end face; along the first direction, the plural first reinforcing plates are arranged at intervals and are located on the same side of the second reinforcing plate away from the third reinforcing plate.

[0020] Optionally, in the embodiments of the present application, the number of the first reinforcing plates is plural, and the plural first reinforcing plates are all connected to the first end face; along the first direction, the plural first reinforcing plates are arranged at intervals and are located on the same side of the second reinforcing plate away from the third reinforcing plate; and / or, the number of the third reinforcing plates is plural, and the plural third reinforcing plates are all connected to the first end face; along the first direction, the plural third reinforcing plates are arranged at intervals and are located on the same side of the second reinforcing plate away from the first reinforcing plate.

[0021] In a second aspect, in the embodiments of the present application, an electrical device is further provided, including the battery pack as described above. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the connection between some battery cells and the bracket in the embodiments of the present application;

[0023] Figure 2 is Figure 1 a schematic structural diagram of the connection between the battery cells and the bracket from another angle in

[0024] Figure 3 is a partial structural diagram of the bracket of the battery pack in the embodiments of the present application;

[0025] Figure 4 is a partial structural diagram of the bracket of the battery pack from another angle in the embodiments of the present application;

[0026] Figure 5 is a cross-sectional structural diagram of another bracket of the battery pack in the embodiments of the present application.

[0027] Description of the Reference Numerals:

[0028] 1. Bracket; 10. Bearing plate; 101. First end face; 102. Second end face; 20. Battery cell; 21. First reinforcing plate; 211. First connecting portion; 212. First boss; 213. First glue groove; 214. First reinforcing rib; 22. Second reinforcing plate; 221. Second connecting portion; 222. Second boss; 223. Second glue groove; 23. Third reinforcing plate; 231. Third connecting portion; 232. Third boss; 31. Auxiliary support plate; X. First direction; Y. Second direction; Z. Third direction. Detailed Embodiments

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0030] The terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0031] The battery pack and the electrical equipment provided in the embodiments of the present application will be described in detail below with reference to the accompanying drawings through specific embodiments and their application scenarios.

[0032] See Figures 1 to 5 , the present application provides a battery pack having intersecting first direction X and third direction Z, including: a plurality of battery cells 20; a bracket 1, and the bracket 1 includes: a bearing plate 10, a first reinforcing plate 21, a second reinforcing plate 22, and a third reinforcing plate 23. The bearing plate 10 has a first end face 101 and a second end face 102 oppositely arranged along the third direction Z. The first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 all extend along the third direction Z, and the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 are all connected to the first end face 101; along the first direction X, the second reinforcing plate 22 is disposed between the first reinforcing plate 21 and the third reinforcing plate 23, and the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 are all spaced apart. Along the third direction Z, the battery cell 20 abuts against the second end face 102, or the battery cell 20 abuts against at least two of the second reinforcing plate 22, the first reinforcing plate 21, and the third reinforcing plate 23.

[0033] In the embodiment of the present application, there are multiple battery cells 20 in the battery pack. The bracket 1 is provided to provide a supporting force and a setting position for the multiple battery cells 20, and the bracket 1 is connected to the box body of the battery pack. Specifically, the bracket 1 includes a bearing plate 10, a first reinforcing plate 21, a second reinforcing plate 22, and a third reinforcing plate 23. Among them, the first reinforcing plate 21 and the third reinforcing plate 23 are arranged at intervals along the first direction X, the second reinforcing plate 22 is clamped between the first reinforcing plate 21 and the third reinforcing plate 23, and the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 are all arranged at intervals along the first direction X.

[0034] The bearing plate 10 includes a first end face 101 and a second end face 102 that are oppositely arranged along the third direction Z. The first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 all extend along the third direction Z and are respectively connected to the first end face 101.

[0035] In practical applications, the bracket 1 and the battery cell 20 are connected to provide a supporting force and a setting position for the battery cell 20 in the battery pack. Specifically, the battery cell 20 can be in contact with the second end face 102, or the battery cell 20 can also be in contact with both the first reinforcing plate 21 and the second reinforcing plate 22, or the battery cell 20 can also be in contact with both the second reinforcing plate 22 and the third reinforcing plate 23, or the battery cell can also be in contact with both the first reinforcing plate 21 and the third reinforcing plate 23, or the battery cell 20 can also be in contact with the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23. As shown in the figure, the cross-section of the bracket 1 with the bearing plate 10, the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 is in the shape of a "mountain". When the "mountain"-shaped bracket 1 is subjected to an external force, the external force can be decomposed and then transmitted to the battery cell 20 connected to the bracket 1. The entire "mountain"-shaped bracket 1 disperses the force, which can play a sufficient role in unloading the force to protect the battery cell 20.

[0036] When the battery cell 20 is in contact with the first end face 101, the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 are all connected to the box body of the battery pack. When the battery pack is subjected to an external impact, the impact force is transmitted to the bracket 1 through the battery box body. The impact force is first transmitted to the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 connected to the box body, then transmitted to the bearing plate 10, and then transmitted to the battery cell 20. In the embodiment of the present application, when the impact force is transmitted to the bracket 1, the settings of the first reinforcing plate 21, the second reinforcing plate 22, and the third reinforcing plate 23 decompose the impact force, so that the entire bracket 1 disperses the force, reducing the impact on the bracket 1 by the impact force. When the decomposed impact force is transmitted to the battery cell 20 through the bearing plate 10 again, the impact on the battery cell 20 is also reduced. Therefore, it has the beneficial effect of protecting the battery cell 20 and improving the safety of the battery pack.

[0037] When the battery cell 20 is in contact with both the first reinforcing plate 21 and the second reinforcing plate 22, the second end face 102 of the carrier plate 10 is connected to the box body of the battery pack. When the battery pack is subjected to an external impact, the impact force is transmitted to the bracket 1 through the battery pack. The impact force is first transmitted to the carrier plate 10 connected to the box body, then to the first reinforcing plate 21 and the second reinforcing plate 22, and then to the battery cell 20. In the embodiment of the present application, after the impact force is transmitted to the carrier plate 10, it is then transmitted to the first reinforcing plate 21 and the second reinforcing plate 22. The arrangement of the first reinforcing plate 21 and the second reinforcing plate 22 decomposes the impact force, enabling the entire bracket 1 to be stressed dispersedly, reducing the impact on the bracket 1 by the impact force, thereby also reducing the impact on the battery cell 20 connected to the first reinforcing plate 21 and the second reinforcing plate 22, and further having the beneficial effect of protecting the battery cell 20 and improving the safety of the battery pack.

[0038] It should be noted that when the battery cell 20 is in contact with the second reinforcing plate 22 and the third reinforcing plate 23, or when the battery cell 20 is in contact with both the second reinforcing plate 22 and the third reinforcing plate 23, or when the battery cell 20 is in contact with the first reinforcing plate 21, the second reinforcing plate 22 and the third reinforcing plate 23. The external impact received by the battery pack is similar to the external force received by the battery cell 20 when the battery cell 20 is in contact with both the first reinforcing plate 21 and the second reinforcing plate 22, and will not be elaborated here.

[0039] Furthermore, the battery cell 20 can be connected to the carrier plate 10 through foaming glue, or can be connected to the first reinforcing plate 21, the second reinforcing plate 22 and the third reinforcing plate 23 through foaming glue. The setting of the foaming glue can realize the connection between the battery cell 20 and the bracket 1. At the same time, the setting of the foaming glue also has a buffering effect on the impact load of the carrier plate 10 or the first reinforcing plate 21, the second reinforcing plate 22 and the third reinforcing plate 23 on the battery cell 20.

[0040] Still further, a plurality of through holes can be formed in the carrier plate 10 along the third direction Z. The setting of the through holes can reduce the weight of the bracket 1, and thus has the beneficial effect of reducing the weight and cost of the battery pack.

[0041] Still further, the first reinforcing plate 21 and the third reinforcing plate 23 can be a wavy structure extending along the second direction Y, and the second reinforcing plate 22 can also be a wavy structure extending along the second direction Y. The wavy first reinforcing plate 21, second reinforcing plate 22 and third reinforcing plate 23 have the beneficial effect of improving the support strength for the carrier plate 10.

[0042] Optionally, in an embodiment of the present application, the first reinforcing plate 21 includes a first connecting portion 211 and a first boss 212; along the third direction Z, one end of the first connecting portion 211 facing away from the first boss 212 is connected to the first end face 101, and the other end of the first connecting portion 211 close to the first boss 212 is connected to the first boss 212, and the battery cell 20 abuts against the first boss 212; the first boss 212 is protruding from the first connecting portion 211 along the first direction X.

[0043] In the embodiment of the present application, the first connection portion 211 is provided to achieve connection with the first end face 101, and the first boss 212 is provided to increase the connection area between the first reinforcing plate 21 and the battery cell 20, so as to improve the connection stability between the first reinforcing plate 21 and the battery cell 20. Specifically, one end of the first connection portion 211 is connected to the first end face 101, and the other end of the first connection portion 211 extends in a direction away from the first end face 101 along the third direction Z, and the first boss 212 is provided at the other end of the first connection portion 211 away from the first end face 101, and the first boss 212 protrudes from the first connection portion 211 along the first direction X. When the battery cell 20 is in contact with at least two of the second reinforcing plate 22, the first reinforcing plate 21 and the third reinforcing plate 23, the battery cell 20 is connected to the first boss 212. When the battery pack is impacted by external force, the external force is transmitted to the battery cell 20 connected to the first boss 212 through the first connecting portion 211. In the embodiment of the present application, the first boss 212 of the first connecting portion 211 protrudes along the first direction X, which increases the connection area between the battery cell 20 and the first reinforcing plate 21, thereby increasing the connection strength between the battery cell 20 and the first reinforcing plate 21, which has the beneficial effect of preventing the battery pack from being impacted by external force, causing the battery cell 20 and the bracket 1 to be separated, resulting in collision damage to the battery cell 20, thereby improving the safety of the battery pack.

[0044] Furthermore, the extension distance of the first connecting portion 211 along the third direction Z can be determined according to actual conditions. The setting of the extension distance is used to provide a reserved space between the first end face 101 and the box body, while increasing the force-bearing stiffness of the bracket 1 so that when the battery pack is impacted by external force, the bracket 1 can play a role in decomposing force.

[0045] Furthermore, a preset angle α is provided between the first connection portion 211 and the first end face 101 . The preset angle α may be equal to 90° or less than 90°. The above arrangement has the beneficial effect of increasing the support strength of the bracket 1 and preventing the bracket 1 from being deformed by external force.

[0046] Optionally, in the embodiment of the present application, along the third direction Z, a first glue groove 213 is formed on the side of the first boss 212 away from the first end surface 101 , and the first glue groove 213 is recessed in a direction close to the first end surface 101 .

[0047] In the embodiment of the present application, the first glue groove 213 is provided to provide a placement space for the connecting glue, so as to achieve bonding between the first boss 212 and the battery cell 20, or between the first boss 212 and the box body through glue. Specifically, the first glue groove 213 is recessed in the direction close to the first end face 101 along the third direction Z. The first glue groove 213 can accommodate a certain amount of glue, which can have a strong bonding effect on the surface of the battery cell 20 and the box body. At the same time, the first glue groove 213 can also provide a space with a certain height for the glue along the third direction Z, so that after the glue is accommodated, it will not flow randomly, ensuring that the glue has a certain thickness to ensure the bonding performance, and improving the bonding strength and structural stability of the battery pack.

[0048] Further, during the assembly process of the battery pack, glue is poured into the first glue groove 213. The setting of the first glue groove 213 can prevent the glue injected into the first glue groove 213 from flowing arbitrarily, such as preventing the glue from flowing outside the first glue groove 213, avoiding the problem of glue overflow. The battery pack has the advantage of higher assembly yield, and at the same time, it also avoids the connection interference of other components caused by glue overflow. In addition, by blocking the glue, the amount of glue used can be controlled, thereby controlling the cost. Among them, the glue can be in the state after the liquid glue solidifies.

[0049] Optionally, in the embodiment of the present application, the battery pack further has a second direction Y. The first direction X, the second direction Y, and the third direction Z intersect pairwise. The first connecting portion 211 extends along the second direction Y. The first reinforcing plate 21 further includes a first reinforcing rib 214; the first reinforcing rib 214 is connected to the side of the first connecting portion 211 facing the second reinforcing plate 22.

[0050] In the embodiment of the present application, the setting of the first reinforcing rib 214 is used to improve the support strength of the first connecting portion 211. As can be seen from the above, there is a certain interval between the first connecting portion 211 and the bearing plate 10 along the third direction Z. In order to improve the support strength of the first connecting portion 211, a plurality of first reinforcing ribs 214 are provided on the side of the first connecting portion 211 facing the second reinforcing plate 22. The first reinforcing ribs 214 are simultaneously connected to the first end face 101 and the first connecting portion 211 to improve the support strength of the first connecting portion 211.

[0051] It should be noted that the number of the first reinforcing ribs 214 can be multiple. Along the second direction Y, the multiple first reinforcing ribs 214 can be evenly spaced. The evenly spaced first reinforcing ribs 214 can evenly increase the support strength of the first reinforcing plate 21. When the battery pack is subjected to external forces, due to the uniform setting of the first reinforcing ribs 214, the support strength of each part of the first reinforcing plate 21 is uniform, and there is no position with weak stiffness. Therefore, there is no problem that the position with weak stiffness is easily damaged, which has the beneficial effect of improving the overall stiffness of the first reinforcing plate 21.

[0052] Optionally, in the embodiment of the present application, the second reinforcing plate 22 includes a second connecting portion 221 and a second boss 222; along the third direction Z, one end of the second connecting portion 221 facing away from the second boss 222 is connected to the first end face 101, and the other end of the second connecting portion 221 close to the second boss 222 is connected to the second boss 222, and the battery cell 20 abuts against the second boss 222; the second boss 222 protrudes from the second connecting portion 221 along the first direction X.

[0053] In the embodiment of the present application, the second connecting portion 221 is provided to realize the connection with the first end face 101, and the second boss 222 is provided to increase the connection area between the second reinforcing plate 22 and the battery cell 20, so as to improve the connection stability between the second reinforcing plate 22 and the battery cell 20. Specifically, one end of the second connecting portion 221 is connected to the first end face 101, the other end of the second connecting portion 221 extends away from the carrier plate 10 along the third direction Z, the second boss 222 is provided at the other end of the second connecting portion 221 away from the carrier plate 10, and the second boss 222 protrudes from the second connecting portion 221 along the first direction X. When the battery cell 20 abuts against at least two of the second reinforcing plate 22, the first reinforcing plate 21 and the third reinforcing plate 23, the battery cell 20 is connected to the second boss 222. When the battery pack is subjected to an external force impact, the external force is transmitted to the battery cell 20 connected to the second boss 222 through the connecting portion. In the embodiment of the present application, the second boss 222 protruding from the second connecting portion 221 along the first direction X increases the connection area between the battery cell 20 and the second reinforcing plate 22, and further increases the connection strength between the battery cell 20 and the second reinforcing plate 22, which has the beneficial effect of preventing the battery cell 20 from colliding and being damaged due to the separation of the battery cell 20 and the bracket 1 when the battery pack is subjected to an external force impact, and improving the safety of the battery pack.

[0054] Furthermore, the extending distance of the second connecting portion 221 along the third direction Z can be determined according to the actual situation. The setting of the extending distance is used to provide a reserved space between the carrier plate 10 and the box body while improving the force-bearing stiffness of the bracket 1, so that when the battery pack is subjected to an external force impact, the bracket 1 can play a role in decomposing the force.

[0055] Optionally, in the embodiment of the present application, a second glue groove 223 is formed on the side surface of the second boss 222 facing away from the first end face 101, and the second glue groove 223 is recessed along the third direction Z towards the direction close to the first end face 101.

[0056] In the embodiment of the present application, the second glue groove 223 is provided to provide a placement space for the connection glue, so as to achieve bonding between the second boss 222 and the battery cell 20, or between the second boss 222 and the box body by glue. Specifically, the second glue groove 223 extends in the direction close to the carrier plate 10 along the third direction Z, and the second glue groove 223 also extends along the extension direction of the second boss 222. The second glue groove 223 can accommodate a certain amount of glue, which can have a strong bonding effect on the battery cell 20 and the surface of the box body. At the same time, the second glue groove 223 can also provide a space with a certain height for the glue along the third direction Z, so that after the glue is accommodated, it will not flow randomly, and the glue is guaranteed to have a certain thickness to ensure the bonding performance, which has the effect of improving the bonding strength and structural stability of the battery pack.

[0057] Furthermore, the second glue groove 223 also has the same function of limiting the glue as the first glue groove 213 described above, which will not be described in detail here.

[0058] It should be noted that the second reinforcing plate 22 may also have reinforcing ribs, which are used to improve the supporting strength of the second connecting portion 221 . The reinforcing ribs are simultaneously connected to the first end surface 101 and the second connecting portion 221 to improve the rigidity of the second connecting portion 221 .

[0059] In practical applications, the multiple reinforcing ribs arranged on both sides of the second connection portion 221 can be staggered, or can be correspondingly arranged on both sides of the second connection portion 221 along the first direction X, and this embodiment does not impose any limitation on this.

[0060] It should be noted that a plurality of reinforcing ribs may be evenly spaced along the second direction Y. The evenly spaced reinforcing ribs may evenly strengthen the support strength of the second reinforcing plate 22. When the battery pack is subjected to external force, the evenly spaced reinforcing ribs may evenly strengthen the support strength of the second reinforcing plate 22. Therefore, when the battery pack is subjected to external force, the stiffness of the second reinforcing plate 22 is evenly spaced, and there is no weak position, and thus there is no problem that the weak position is easily damaged, which has the beneficial effect of improving the overall stiffness of the second reinforcing plate 22.

[0061] Optionally, in an embodiment of the present application, the third reinforcing plate 23 includes a third connecting portion 231 and a third boss 232; along the third direction Z, one end of the third connecting portion 231 facing away from the third boss 232 is connected to the first end face 101, and the other end of the third connecting portion 231 close to the third boss 232 is connected to the third boss 232, and the battery cell 20 abuts against the third boss 232; the third boss 232 is protruding from the third connecting portion 231 along the first direction X.

[0062] In the embodiment of the present application, the third connecting portion 231 is provided to realize the connection with the first end face 101, and the third boss 232 is provided to increase the connection area between the third reinforcing plate 23 and the battery cell 20, so as to improve the connection stability between the third reinforcing plate 23 and the battery cell 20. Specifically, one end of the third connecting portion 231 is connected to the first end face 101, and the other end of the third connecting portion 231 extends in a direction away from the carrier plate 10 along the third direction Z. The third boss 232 is provided at the other end of the third connecting portion 231 away from the carrier plate 10, and the third boss 232 protrudes from the third connecting portion 231 along the first direction X. When the battery cell 20 abuts against at least two of the second reinforcing plate 22, the first reinforcing plate 21 and the third reinforcing plate 23, the battery cell 20 is connected to the third boss 232. When the battery pack is subjected to an external force impact, the external force is transmitted to the battery cell 20 connected to the third boss 232 through the connecting portion. In the embodiment of the present application, the third boss 232 protruding from the third connecting portion 231 along the first direction X increases the connection area between the battery cell 20 and the third reinforcing plate 23, and further increases the connection strength between the battery cell 20 and the third reinforcing plate 23, having the beneficial effect of preventing the battery cell 20 from being damaged due to collision when the battery pack is impacted by an external force and the battery cell 20 is separated from the bracket 1, and improving the safety of the battery pack.

[0063] Furthermore, the extension distance of the third connecting portion 231 along the first direction X can be determined according to the actual situation. The setting of the extension distance is used to provide a reserved space between the carrier plate 10 and the box body, and at the same time improve the force-bearing stiffness of the bracket 1, so that when the battery pack is impacted by an external force, the bracket 1 can play a role in decomposing the force.

[0064] It should also be noted that the third reinforcing plate 23 can have the same structure as the first reinforcing plate 21, and also has the same technical features and technical effects, which will not be elaborated in this embodiment.

[0065] Optionally, in the embodiment of the present application, an auxiliary support plate 31 is further included. The auxiliary support plate 31 extends along the third direction Z. The auxiliary support plate 31 is connected to the first end face 101. Along the first direction X, the auxiliary support plate 31 is disposed between the first reinforcing plate 21 and the second reinforcing plate 22, or the auxiliary support plate 31 is disposed between the second reinforcing plate 22 and the third reinforcing plate 23; the auxiliary support plate 31 is spaced apart from the first reinforcing plate 21, the second reinforcing plate 22 and the third reinforcing plate 23.

[0066] In the embodiment of the present application, the auxiliary support plate 31 is provided to further improve the stiffness of the bracket 1. Specifically, the auxiliary support plate 31 is clamped between the first reinforcing plate 21 and the second reinforcing plate 22 along the first direction X, or the auxiliary support plate 31 is clamped between the second reinforcing plate 22 and the third reinforcing plate 23 along the first direction X, and one side of the auxiliary support plate 31 close to the bearing plate 10 is connected to the first end face 101. It can be imagined that the setting of the auxiliary support plate 31 can improve the bearing strength of the corresponding middle regions between the first reinforcing plate 21 and the second reinforcing plate 22, and between the second reinforcing plate 22 and the third reinforcing plate 23 in the bearing plate 10, thereby improving the support strength of the bracket 1.

[0067] Optionally, in the embodiment of the present application, the number of the first reinforcing plates 21 is multiple, and the multiple first reinforcing plates 21 are all connected to the first end face 101; along the first direction X, the multiple first reinforcing plates 21 are arranged at intervals, and are located on the same side of the second reinforcing plate 22 away from the third reinforcing plate 23; and / or, the number of the third reinforcing plates 23 is multiple, and the multiple third reinforcing plates 23 are all connected to the first end face 101; along the first direction X, the multiple third reinforcing plates 23 are arranged at intervals, and are located on the same side of the second reinforcing plate 22 away from the first reinforcing plate 21.

[0068] In the embodiment of the present application, the number of the first reinforcing plates 21 can be multiple, and the multiple first reinforcing plates 21 are all connected to the first end face 101 and are arranged at intervals with each other. The multiple first reinforcing plates 21 are arranged on the side of the second reinforcing plate 22 away from the third reinforcing plate 23. The arrangement of the multiple first reinforcing plates 21 can disperse the external force along the multiple first reinforcing plates 21, so that the whole bracket 1 is more evenly stressed, and the buffering effect of the force is better. The arrangement of the multiple first reinforcing plates 21 can also effectively improve the support strength for the bearing plate 10.

[0069] Furthermore, the number of the third reinforcing plates 23 can be multiple, and the multiple third reinforcing plates 23 are all connected to the first end face 101 and are arranged at intervals with each other. The multiple third reinforcing plates 23 are arranged on the side of the second reinforcing plate 22 away from the first reinforcing plate 21. The arrangement of the multiple third reinforcing plates 23 can disperse the external force along the multiple third reinforcing plates 23, so that the whole bracket 1 is more evenly stressed, and the buffering effect of the force is better. The arrangement of the multiple third reinforcing plates 23 can also effectively improve the support strength for the bearing plate 10.

[0070] Optionally, in the embodiment of the present application, there is also provided an electrical device, which is characterized in that it includes the battery pack as described above.

[0071] In the embodiments of the present application, the electrical device may be, but is not limited to, a mobile device (such as a mobile phone, a laptop computer, etc.), an electric vehicle (such as a pure electric vehicle, a hybrid electric vehicle, a plug-in hybrid electric vehicle, an electric bicycle, an electric scooter, an electric golf cart, an electric truck, etc.), an electric train, a ship, a satellite, an energy storage system, etc.

[0072] Further, the above electrical device includes the battery pack as described above, and thus also includes all the beneficial effects of the above battery pack, which will not be elaborated here.

[0073] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0074] The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Those of ordinary skill in the art, under the inspiration of the present application and without departing from the spirit of the present application and the scope protected by the claims, can still make many forms, all of which fall within the protection scope of the present application.

Claims

1. A battery pack having a first direction (X) and a third direction (Z) intersecting each other, characterized in that: include: A plurality of battery cells (20); A bracket (1), the bracket (1) comprising: a bearing plate (10), a first reinforcing plate (21), a second reinforcing plate (22) and a third reinforcing plate (23), the bearing plate (10) having a first end surface (101) and a second end surface (102) arranged opposite to each other along the third direction (Z); The first reinforcing plate (21), the second reinforcing plate (22) and the third reinforcing plate (23) all extend along the third direction (Z), and the first reinforcing plate (21), the second reinforcing plate (22) and the third reinforcing plate (23) are all connected to the first end surface (101); Along the first direction (X), the second reinforcing plate (22) is arranged between the first reinforcing plate (21) and the third reinforcing plate (23), and the first reinforcing plate (21), the second reinforcing plate (22) and the third reinforcing plate (23) are all arranged at intervals; Along the third direction (Z), the battery cell (20) abuts against the second end surface (102), or, The battery core (20) abuts against at least two of the first reinforcing plate (21), the second reinforcing plate (22) and the third reinforcing plate (23).

2. The battery pack according to claim 1, characterized in that: The first reinforcing plate (21) comprises a first connecting portion (211) and a first boss (212); Along the third direction (Z), one end of the first connecting portion (211) facing away from the first boss (212) is connected to the first end surface (101), and the other end of the first connecting portion (211) close to the first boss (212) is connected to the first boss (212), and the battery cell (20) is in contact with the first boss (212); the first boss (212) is protruding from the first connecting portion (211) along the first direction (X).

3. The battery pack according to claim 2, characterized in that: Along the third direction (Z), a first glue groove (213) is provided on the side of the first boss (212) away from the first end surface (101), and the first glue groove (213) is recessed in a direction approaching the first end surface (101).

4. The battery pack according to claim 2, characterized in that: The battery pack also has a second direction (Y), the first direction (X), the second direction (Y) and the third direction (Z) intersect each other, the first connecting portion (211) extends along the second direction (Y), and the first reinforcing plate (21) further includes a first reinforcing rib (214); The first reinforcing rib (214) is connected to the side surface of the first connecting portion (211) facing the second reinforcing plate (22).

5. The battery pack according to claim 1, characterized in that: The second reinforcing plate (22) comprises a second connecting portion (221) and a second boss (222); Along the third direction (Z), one end of the second connection portion (221) facing away from the second boss (222) is connected to the first end surface (101), and the other end of the second connection portion (221) close to the second boss (222) is connected to the second boss (222), and the battery cell (20) is in abutment with the second boss (222); the second boss (222) is protruding from the second connection portion (221) along the first direction (X).

6. The battery pack according to claim 5, characterized in that: A second glue groove (223) is provided on the side of the second boss (222) facing away from the first end surface (101), and the second glue groove (223) is recessed in a direction close to the first end surface (101) along the third direction (Z).

7. The battery pack according to claim 1, characterized in that: The third reinforcing plate (23) comprises a third connecting portion (231) and a third boss (232); Along the third direction (Z), one end of the third connection portion (231) facing away from the third boss (232) is connected to the first end surface (101), and the other end of the third connection portion (231) close to the third boss (232) is connected to the third boss (232), and the battery cell (20) is in abutment with the third boss (232); the third boss (232) is protruding from the third connection portion (231) along the first direction (X).

8. The battery pack according to any one of claims 1 to 7, characterized in that: It also includes an auxiliary support plate (31), the auxiliary support plate (31) extending along the third direction (Z), the auxiliary support plate (31) being connected to the first end surface (101), Along the first direction (X), the auxiliary support plate (31) is arranged between the first reinforcing plate (21) and the second reinforcing plate (22), or the auxiliary support plate (31) is arranged between the second reinforcing plate (22) and the third reinforcing plate (23); the auxiliary support plate (31) is spaced apart from the first reinforcing plate (21), the second reinforcing plate (22) and the third reinforcing plate (23).

9. The battery pack according to claim 1, characterized in that: There are multiple first reinforcing plates (21), and all of the multiple first reinforcing plates (21) are connected to the first end surface (101); along the first direction (X), the multiple first reinforcing plates (21) are arranged at intervals, and are located on the same side of the second reinforcing plate (22) away from the third reinforcing plate (23); and / or, there are multiple third reinforcing plates (23), and all of the multiple third reinforcing plates (23) are connected to the first end surface (101); along the first direction (X), the multiple third reinforcing plates (23) are arranged at intervals, and are located on the same side of the second reinforcing plate (22) away from the first reinforcing plate (21).

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

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