WO2023020128A1 - Battery pack and vehicle - Google Patents

Abstract

The present application provides a battery pack. The battery pack comprises a tray, a cell and a mounting assembly. The tray has an accommodating cavity. The cell is accommodated in the accommodating cavity. There is a gap between the cell and the side wall of the accommodating cavity. The mounting assembly is connected to the tray. The mounting assembly comprises a wedge-shaped structure and a pressing mechanism. The wedge-shaped structure is connected to the pressing mechanism. The wedge-shaped structure is at least partially filled in the gap. The pressing mechanism is detachably connected to the tray. The pressing mechanism is used to adjust the distance between the wedge-shaped structure and the bottom wall of the accommodating cavity.

Description

Battery pack and vehicle

This application claims the priority of a Chinese patent application with application number 202110965635.5 and application title "Battery Pack and Vehicle" filed with the China Patent Office on August 19, 2021, the entire contents of which are incorporated herein by reference.

technical field

The present application belongs to the technical field of vehicles, and in particular relates to a battery pack and a vehicle.

Background technique

The battery pack is the core energy source of new energy vehicles, which provides driving current for vehicles and is an indispensable component in new energy vehicles.

At present, when the battery pack is assembled with the vehicle, it usually adopts a module-free solution. For the battery pack without a module solution, the battery cells are directly loaded into the battery pack tray, and an insulating plate or support plate needs to be added between the battery cell and the inner wall of the tray. And other structures, used for insulation, while protecting the battery core and filling the gap between the battery core and the inner wall of the tray.

However, even with the support plate installed, the gap between the cell and the tray cannot be completely filled, resulting in insufficient support on the large surface of the cell.

Contents of the invention

In a first aspect, the embodiment of the present application provides a battery pack. The battery pack includes: tray, battery cells and mounting components. The tray has a receiving cavity. The electric core is accommodated in the containing chamber. There is a gap between the battery core and the side wall of the containing chamber. The mounting assembly is connected to the tray. The mounting assembly includes a wedge structure and a pressing mechanism. The wedge structure is connected with the pressing mechanism. The wedge-shaped structure at least partially fills the gap. The pressing mechanism is detachably connected with the tray. The pressing mechanism is used to adjust the distance between the wedge-shaped structure and the bottom wall of the accommodating chamber.

In one embodiment, the wedge-shaped structure has a first inclined surface. A side of the side wall of the accommodation cavity close to the battery core has a second inclined surface. The first inclined surface of the wedge-shaped structure abuts against the second inclined surface of the accommodation cavity.

In one embodiment, the second inclined surface of the accommodating cavity is inclined relative to the bottom wall of the accommodating cavity. The first inclined surface of the wedge-shaped structure is inclined relative to the bottom wall of the accommodating cavity. Under the action of the pressing mechanism, the first inclined surface of the wedge-shaped structure can slide relative to the second inclined surface of the accommodating chamber.

In one embodiment, the side of the wedge-shaped structure opposite to the first inclined surface abuts against the battery core.

In one embodiment, a dividing structure is arranged in the accommodation cavity. The division structure divides the accommodating chamber into at least two chambers. The wedge structures include at least one wedge structure. The split structure is in contact with a part of the wedge-shaped structure in the at least one wedge-shaped structure, and the position where the split structure abuts against the first inclined surface is an inclined plane.

In one embodiment, the pressing mechanism includes a fixing piece and a pressing plate. The fixture presses the pressure plate against the wedge-shaped structure.

In one embodiment, the fixing member extends through the platen and is threadedly connected with the tray. The fixing piece is used to adjust the pressure exerted on the wedge structure by adjusting the screw connection with the pressure plate.

In one embodiment, the fixing element is perpendicular to the pressing plate, and both the fixing element and the pressing plate are accommodated in the accommodating cavity.

In one embodiment, a relief groove is provided at the matching position of the wedge-shaped structure and the pressure plate. The pressure plate is at least partially within the relief groove.

In one embodiment, the wedge structure includes a wedge housing and a reinforcement plate. The wedge-shaped housing encloses a wedge-shaped cavity. The reinforcing plate is arranged in the wedge-shaped cavity. The wedge housing has a first wall, a second wall, a third wall, and a fourth wall. The first wall is opposite to the second wall. The third wall is opposite to the fourth wall. The third wall is in contact with the pressing plate.

In one embodiment, the first wall abuts against the first inclined surface of the wedge-shaped structure. The second wall is in contact with the electric core.

In one embodiment, the wedge-shaped structure is provided with a rectangular cavity. The rectangular cavity is arranged on the side of the third wall away from the fourth wall. At least one relief slot is opened on the rectangular cavity. The pressing plate part is accommodated in the relief groove and abuts against the third wall.

In one embodiment, the first wall is inclined relative to the second wall, and at least one exhaust hole is opened on the second wall.

In one embodiment, the pressure plate includes a pressing portion and a reinforcing portion. The pressing part is connected with the reinforcing part. The pressing part abuts against the wedge structure.

In one embodiment, there are two reinforcing parts. The two reinforcing parts are located on opposite sides of the pressing part respectively.

In one embodiment, the battery core is sandwiched between at least two wedge-shaped structures.

In a second aspect, an embodiment of the present application provides a vehicle, including the battery pack and the processor in any of the foregoing embodiments. The battery pack is arranged inside the vehicle and is electrically connected to the processor. The processor is used to control the charging and discharging of the battery pack.

In the embodiment of the present application, the tray is used for accommodating and placing the battery cells. The electric core is placed in the accommodation chamber of the tray. Due to the size tolerance of the battery cell, the stacking tolerance of the battery cell, the tolerance of the tray, and the process limitation of placing the battery cell into the tray, there is a certain size gap between the side wall of the storage cavity and the battery cell, resulting in the side of the cell and the storage cavity. The wall cannot be abutted. Therefore, it is difficult to achieve large-area contact between the sidewall of the receiving chamber and the battery cell 20 to constrain and support the battery cell. The installation component is used to fill the above-mentioned gap, and the installation component is further connected with the tray, and the battery cell 20 is provided with a large-area constraint and support force through the abutment of the installation component and the battery cell. The fixing part is connected with the tray in a detachable manner. The fixing part passes through the pressing plate and presses the pressing plate on the wedge-shaped structure. The wedge-shaped structure is used to restrain the battery core. After the filled cell enters the cavity, there is a certain gap between the cell and the side wall of the cavity, and the wedge-shaped structure is filled in the gap, and the gaps of different sizes can be adaptively filled by controlling the screwing amount of the fixing piece until The wedge-shaped structure can be tightly attached to the battery core, providing large-scale restraint and support for the battery core. In the embodiment of this application, by controlling the screw-in amount of the fixing member, the wedge-shaped structure provides large surface constraints and support for the battery cell, which can fix the battery cell, limit the expansion of the battery cell, improve the structural reliability of the battery pack, and improve the cycle life of the battery. Beneficial effect.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings that need to be used in the implementation manner. Obviously, the drawings in the following description are some implementation manners of the application, and are common to those skilled in the art. As far as the skilled person is concerned, other drawings can also be obtained based on these drawings on the premise of not paying creative work.

FIG. 1 is an exploded view of a battery pack with four cells in an embodiment of the present application.

Fig. 2 is an exploded view of the battery pack with two cells in the embodiment of the present application.

FIG. 3 is a schematic structural diagram of a battery pack in an embodiment of the present application.

Fig. 4 is a structural schematic diagram of a battery pack without mounting components in the prior art.

Fig. 5 is a top view of the battery pack with four cells in the embodiment of the present application (with the upper cover removed).

Fig. 6 is a top view of the battery pack with two cells in the embodiment of the present application (with the upper cover removed).

Fig. 7 is a cross-sectional view of the battery pack in the embodiment of the present application (with the upper cover removed).

Fig. 8 is a schematic structural diagram of a wedge-shaped structure in an embodiment of the present application.

Fig. 9 is a schematic structural diagram of a wedge-shaped structure with vent holes in an embodiment of the present application.

Fig. 10 is a cross-sectional view of a wedge-shaped structure in an embodiment of the present application.

Fig. 11 is a schematic structural diagram of a pressure plate in an embodiment of the present application.

Fig. 12 is a schematic structural view of a pressure plate in another embodiment of the present application.

Fig. 13 is a partial cross-sectional view of a prior art battery pack without mounting components.

Fig. 14 is a partial cross-sectional view of the wedge-shaped structure before locking in an embodiment of the present application.

Fig. 15 is a partial cross-sectional view of a locked wedge structure in an embodiment of the present application.

Fig. 16 is a partial cross-sectional view of the wedge-shaped structure before locking in another embodiment of the present application.

Fig. 17 is a partial cross-sectional view of a locked wedge structure in another embodiment of the present application.

Fig. 18 is a schematic diagram of a vehicle according to an embodiment of the present application.

Explanation of reference signs:

1. Battery pack; 10. Tray; 101. Accommodating cavity; Side wall, 1010; Bottom wall, 103; 11. Split structure; 12. Chamber; 31. Fixing piece; 32. Pressure plate; 33. Wedge structure; 331. Giving way; 332. Wedge housing; 333. Reinforcement plate; 3321. First wall; 3322. Second wall; 3323. Third wall; 3324 , the fourth wall; 33221, the exhaust hole; 321, the pressing part; 322, the reinforcement part; the first inclined surface, 330; the second inclined surface, 102; the third inclined surface, 110; the rectangular cavity, 33230; the vehicle , 100; Processor, 1000.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

It should be understood that reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present application. Thus, appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily referring to the same embodiment. Furthermore, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It should be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application can be practiced in sequences other than those illustrated or described herein, and that references to "first," "second," etc. distinguish Objects are generally of one type, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the specification and claims means at least one of the connected objects, and the character "/" generally means that the related objects are an "or" relationship.

The battery pack and the vehicle provided by the embodiments of the present application will be described in detail below through specific embodiments and application scenarios with reference to the accompanying drawings.

The purpose of the embodiment of the present application is to provide a battery pack and a vehicle, which can solve the problem in the prior art that the battery cells in the battery pack are insufficiently supported and cannot limit the expansion of the battery cells.

Referring to FIG. 1 to FIG. 3 , FIG. 5 to FIG. 12 , and FIG. 14 to FIG. 17 , an embodiment of the present application provides a battery pack 1 , including: a tray 10 , a battery cell 20 , and a mounting assembly 30 . The tray 10 defines an accommodating cavity 101 . The cell 20 is accommodated in the cavity 101 , there is a gap between the cell 20 and the sidewall 1010 of the cavity 101 of the tray 10 , and the mounting assembly 30 is connected to the tray 10 .

The mounting assembly 30 includes a wedge structure 33 and a pressing mechanism 300 . The wedge structure 33 is connected or abutted against the pressing mechanism 300 . The wedge-shaped structure 33 at least partially fills the gap. The pressing mechanism 300 is detachably connected to the tray 10 . The pressing mechanism 300 is used to adjust the depth of the wedge-shaped structure 33 embedded in the gap. In one embodiment, the pressing mechanism 300 is used to adjust the position of the wedge-shaped structure 33 in the gap. In one embodiment, the pressing mechanism 300 is used to adjust the distance between the wedge-shaped structure 33 and the bottom wall 103 of the accommodating cavity 101 . In the embodiment of the present application, the tray 10 is used to accommodate the battery cells 20 . The battery cells 20 are placed in the cavity 101 of the tray 10 . Due to the dimensional tolerance of the battery cell 20 , the stacking tolerance of the battery cell 20 , the dimensional tolerance of the tray 10 , and the process limitation of putting the battery cell 20 into the tray 10 , there is a certain distance between the side wall 1010 of the receiving chamber 101 and the battery cell 20 . The size of the gap prevents the electric core 20 from contacting or abutting against the side wall 1010 of the receiving cavity 101 . Therefore, it is difficult to constrain and support the battery cell 20 through the large-area contact between the receiving cavity 101 and the battery cell 20 . The mounting assembly 30 is used to fill the aforementioned gap. The mounting assembly 30 is connected to the tray 10 , and the mounting assembly 30 is further abutted against the battery cell 20 to provide a large-area constraint and support for the battery cell 20 .

Further, the pressing mechanism 300 is detachably connected to the tray 10 . The pressing mechanism 300 presses the wedge-shaped structure 33 . The wedge structure 33 is used to constrain the battery core 20 . After the battery core 20 is accommodated in the housing cavity 101, there is a certain gap between the battery core 20 and the side wall 1010 of the housing cavity 101, the wedge-shaped structure 33 is filled in the gap, and the depth of the wedge-shaped structure 33 embedded in the gap is controlled by the pressing mechanism 300 , until the wedge-shaped structure 33 can be close to the battery cell 20, and then squeeze the battery cell 20 through the wedge-shaped structure 33 to provide large surface restraint and support for the battery cell 20, so that the battery cell 20 is not easy to shake. Compared with the battery pack in the prior art (as shown in Fig. 4 and Fig. 13), in the embodiment of the present application, the depth of the wedge-shaped structure 33 embedded in the gap is controlled by the pressing mechanism 300, thereby providing large surface constraints for the battery cell 20 and support, thereby fixing the cell 20, limiting the expansion of the cell 20, improving the structural reliability of the battery pack 1, and improving the battery cycle life.

It should be noted that the pressing mechanism 300 includes a plurality of fixing pieces 31 and a plurality of pressing plates 32 , wherein the fixing pieces 31 correspond to the pressing plates 32 one by one, and the fixing pieces 31 and the pressing plates 32 are detachably connected. Mounting assembly 30 includes at least one wedge structure 33 . In one embodiment, a plurality of fixing parts 31 and a plurality of pressing plates 32 are connected to the same wedge-shaped structure 33, and the plurality of fixing parts 31 are independent of each other, and the plurality of pressing plates 32 are independent of each other, that is, it can Each fixture 31 and each pressure plate 32 is individually controlled. In one embodiment, uneven gaps can be filled respectively by controlling the screwing amount of each fixing member 31 screwed into the side wall 1010 of the accommodating chamber 101 .

It should be noted that the binding force of the wedge-shaped structure 33 on the battery cell 20 is positively related to the screw-in amount of the fixing member 31 . The restraining force of the wedge-shaped structure 33 on the battery cell 20 can be controlled by controlling the screw-in amount of the fixing member 31 .

In one embodiment, the wedge-shaped structure 33 has a wedge-shaped cross section. The wedge structure 33 has a first inclined surface 330 . The side wall 1010 of the accommodating cavity 101 has a second inclined surface 102 on a side close to the battery core 20 . It should be understood that the second inclined surface 102 is the side of the inner wall of the tray 10 that is close to the battery cell 20 . The first inclined surface 330 of the wedge-shaped structure 33 abuts against the second inclined surface 102 of the accommodating cavity 101 . In the embodiment of the present application, the second inclined surface 102 of the accommodation chamber 101 is inclined relative to the bottom wall 103 of the accommodation chamber 101 , and the first inclined surface 330 of the wedge-shaped structure 33 is inclined relative to the bottom wall 103 of the accommodation chamber 101 . The bottom wall 103 is inclined.

In the embodiment of the present application, the first inclined surface 330 of the wedge-shaped structure 33 may abut against the second inclined surface 102 of the receiving cavity 101 . In one embodiment, under the action of the pressing mechanism 300 , the first inclined surface 330 of the wedge structure 33 can also slide relative to the second inclined surface 102 of the receiving cavity 101 . When the fixing member 31 is screwed in toward the bottom of the tray 10 , the fixing member 31 pushes the pressing plate 32 , so that the pressing plate 32 exerts a pushing force on the wedge-shaped structure 33 toward the bottom of the tray 10 . The thrust pushes the wedge-shaped structure 33 to slide along the second inclined surface 102 of the cavity 101 , so that the wedge-shaped structure 33 moves toward the bottom wall 103 of the cavity 101 and moves toward the battery cell 20 in a direction parallel to the bottom surface of the tray 10 . Therefore, the movement of the wedge-shaped structure 33 towards the battery cell 20 makes the wedge-shaped structure 33 constantly squeeze the battery cell 20 , and the pressing force will become larger and larger, so as to realize the constraint on the battery cell 20 . When the wedge-shaped structure 33 fills the gap and has a certain pressing force, the inclined surface of the wedge-shaped structure 33 abuts against the second inclined surface 102 of the accommodating cavity 101 . In the embodiment of the present application, the second inclined surface 102 of the accommodating cavity 101 cooperates with the first inclined surface 330 of the wedge-shaped structure 33 to fix the electric core 20, improve the binding force on the electric core 20, and enhance the beneficial effects of reliability .

In one embodiment, a dividing structure 11 is provided in the accommodation chamber 101 , and the division structure 11 divides the accommodation chamber 101 into at least two chambers 12 .

The split structure 11 abuts against the wedge-shaped structure 33 , and the position where the split structure 11 and the wedge-shaped structure 33 abuts against the first inclined surface 330 is an inclined plane.

In the embodiment of the present application, the dividing structure 11 is used to divide the accommodating cavity 101 into a plurality of chambers 12 for installing a plurality of electric cores 20 . When the compartment 101 has the split structure 11 , the battery cell 20 is disposed between the split structure 11 and the first inclined surface 330 of the tray 10 . A plurality of wedge-shaped structures 33 can be respectively disposed between the first inclined surface 330 of the tray 10 and the battery cells 20 and between the split structure 11 and the battery cells 20 . The split structure 11 has a third inclined surface 110 . The first inclined surface 330 of the wedge structure 33 can abut against the third inclined surface 110 of the split structure 11 . In one embodiment, under the action of the pressing mechanism 300 , the first inclined surface 330 of the wedge-shaped structure 33 can also slide relative to the third inclined surface 110 of the dividing structure 11 . In the embodiment of the present application, the third inclined surface 110 of the split structure 11 cooperates with the first inclined surface 330 of the wedge-shaped structure 33 to fix the battery cell 20, improve the binding force on the battery cell 20, and enhance the beneficial effect of reliability .

It should be noted that, in practical applications, two battery cells 20 may be assembled in the accommodation cavity 101 , or four battery cells 20 or other numbers of battery cells 20 may be assembled in the accommodation cavity 101 . Different numbers of cells 20 will have corresponding numbers of chambers 12 , which is not limited in this embodiment.

In one embodiment, the pressing mechanism 300 includes a fixing part 31 and a pressing plate 32 . In one embodiment, the fixing member 31 is a screw. In one embodiment, as shown in FIG. 8 , a relief groove 331 is provided at the matching position of the wedge-shaped structure 33 and the pressing plate 32 . The pressing plate 32 may be at least partially located in the relief groove 331 .

In the embodiment of the present application, the fixing member 31 is detachably connected to the tray 10 . The fixing member 31 passes through the pressing plate 32 and presses the pressing plate 32 on the wedge-shaped structure 33 . The wedge structure 33 is used to constrain the battery core 20 . After the cell 20 is accommodated in the cavity 101 , there is a certain gap between the cell 20 and the side wall 1010 of the cavity 101 . The wedge-shaped structure 33 is filled in the above-mentioned gap, and the gaps of different sizes can be adaptively filled by controlling the screw-in amount of the fixing member 31 until the wedge-shaped structure 33 can be close to the battery cell 20, and then the wedge-shaped structure 33 is used to squeeze the battery cell 20, Provide large surface constraints and support for the battery cell 20, so that the battery cell 20 is not easy to shake.

The relief slot 331 is used for placing and positioning the pressing plate 32 to avoid loosening and dislocation of the pressing plate 32 . The relief groove 331 passes through the first inclined surface 330 of the wedge structure 33 and extends to the surface of the wedge structure 33 opposite to the first inclined surface 330 . The relief slot 331 can pass through the entire wedge structure 33 , or can be opened in the wedge structure 33 . A part of the pressing plate 32 is placed in the relief groove 331 , and another part of the pressing plate 32 is outside the relief groove 331 . The pressing plate 32 is at least partially between the fixing member 31 and the tray 10 . In the embodiment of the present application, by restricting the movement of the pressing plate 32 so as to restrict the wedge-shaped structure 33 from loosening along the length direction, it has the beneficial effect of fixing the battery cell 20 and improving the stability of the battery cell 20 .

In one embodiment, the fixing member 31 extends through the pressing plate 32 and is threadedly connected with the tray 10 . The fixing member 31 is used to adjust the pressure exerted on the wedge-shaped structure 33 by adjusting the screw connection with the pressing plate 32 .

In one embodiment, the fixing member 31 is perpendicular to the pressing plate 32, and both the fixing member 31 and the pressing plate 32 are accommodated in the accommodating cavity 101.

It should be noted that the fixing member 31 may be a bolt or a screw. When the fixing member 31 is a screw, the nut on the screw is used to press the pressing plate 32 to adjust the embedding depth of the wedge-shaped structure 33 in the gap. The pressing mechanism 300 can also be a buckle and elastic clamping structure, which is connected to the wedge-shaped structure 33 and the tray 10 respectively to realize the function of pressing the wedge-shaped structure 33 , which is not limited in this embodiment.

It should also be noted that the wedge-shaped structure 33 is provided with at least two relief grooves 331 , and the two relief grooves 331 are arranged at intervals.

In one embodiment, the wedge structure 33 is a hollow structure, and the wedge structure 33 includes a wedge housing 332 and a reinforcing plate 333 . The wedge housing 332 encloses a wedge cavity. The reinforcing plate 333 is disposed in the wedge-shaped cavity.

The wedge-shaped housing 332 includes a first wall 3321 , a second wall 3322 , a third wall 3323 and a fourth wall 3324 . The first wall 3321 and the second wall 3322 are opposite to each other. In one embodiment, the first wall 3321 and the second wall 3322 form a preset angle. The third wall 3323 is opposite to the fourth wall 3324 . In one embodiment, the third wall 3323 is parallel to the fourth wall 3324 .

Wherein, the third wall surface 3323 abuts against the pressing plate 32 .

In the embodiment of the present application, the wedge-shaped housing 332 defines an outer surface of the wedge-shaped structure 33 for abutting against the battery cell 20 and the tray 10 . In one embodiment, as shown in FIG. 10 , the wedge housing 332 is a hollow structure, and a reinforcing plate 333 is disposed inside the hollow structure, and the reinforcing plate 333 is used to increase the strength of the wedge housing 332 . The first wall surface 3321 is an inclined surface, and the first wall surface 3321 can be used to abut against the second inclined surface 102 of the receiving chamber 101 , and can also be used to abut against the third inclined surface 110 of the dividing structure 11 . The second wall surface 3322 is a vertical plane, and the second surface is used to abut against the battery cell 20 . The first wall surface 3321 and the second wall surface 3322 form a preset angle. The third wall 3323 and the fourth wall 3324 are parallel to each other. The wedge-shaped housing 332 is surrounded by a first wall 3321 , a second wall 3322 , a third wall 3323 and a fourth wall 3324 . The cross section of the wedge-shaped housing 332 is a right-angled trapezoid or a right-angled acute triangle. When the fixing member 31 is screwed into the wedge structure 33 , the fixing member 31 exerts pressure on the pressing plate 32 to press the pressing plate 32 against the third wall 3323 . In the embodiment of the present application, the hollow wedge-shaped structure 33 provided with the reinforcing plate 333 reduces the weight of the wedge-shaped structure 33 while meeting the predetermined strength, and has the beneficial effect of reducing the weight of the battery pack 1 .

It should be noted that the wedge-shaped structure 33 is generally an extruded aluminum profile, and may also be a plastic part, which is not limited in this embodiment.

In one embodiment, the wedge-shaped structure 33 is provided with a rectangular cavity 33230 . The rectangular cavity 33230 is disposed on a side of the third wall 3323 away from the fourth wall 3324 .

Wherein, the rectangular cavity 33230 is provided with at least one relief slot 331 . The pressing plate 32 is partially accommodated in the relief groove 331 and abuts against the third wall surface 3323 .

In the embodiment of the present application, the rectangular cavity 33230 is used to open the relief groove 331 , and the third wall surface 3323 serves as the bottom surface of the relief groove 331 . The relief slot 331 is disposed on a side of the third wall 3323 away from the fourth wall 3324 .

It should be noted that the rectangular cavity 33230 may be integrally formed with the wedge-shaped structure 33, or may be fixedly connected with the wedge-shaped structure 33, which is not limited in this embodiment.

In one embodiment, the first wall 3321 is inclined relative to the second wall 3322 . In one embodiment, as shown in FIG. 9 , at least one exhaust hole 33221 is opened on the second wall surface 3322 .

In the embodiment of the present application, the wedge-shaped structure 33 provided with the vent hole 33221 is used to constrain the side of the cell 20 provided with the explosion-proof valve. The wedge-shaped structure 33 with the exhaust hole 33221 is used to guide and exhaust the high-temperature gas when the battery cell 20 is thermally out of control and opens the valve, so as to avoid safety accidents caused by the overheating of the battery cell 20 . In the embodiment of the present application, the battery cell 20 provided with the exhaust hole 33221 can discharge the high-temperature gas in time, which has the beneficial effect of enhancing the safety of the battery cell 20 .

It should be noted that the exhaust hole 33221 may be circular, elliptical or polygonal, which is not limited in this embodiment.

It should also be noted that the two exhaust holes 33221 are arranged at intervals, and the exhaust holes 33221 can be evenly arranged on the second wall surface 3322, or can be unevenly arranged on the second wall surface 3322. Do not make any restrictions.

In one embodiment, as shown in FIGS. 11 and 12 , the pressing plate 32 includes a pressing portion 321 and a reinforcing portion 322 , and the pressing portion 321 is connected to the reinforcing portion 322 . The pressing portion 321 abuts against the wedge structure 33 .

In the embodiment of the present application, when the fixing member 31 is screwed into the wedge-shaped structure 33 , the pressing plate 32 pushes the wedge-shaped structure 33 to move toward the bottom wall 103 of the accommodating chamber 101 , and the pressing portion 321 abuts against the third wall surface 3323 . In one embodiment, the pressing part 321 and the reinforcing part 322 are integrally formed. The reinforcement part 322 abuts against both sides of the relief groove 331 , so as to increase the strength of the pressing plate 32 and avoid damage to the relief groove 331 . The reinforcement part 322 may be a flange structure, a rib structure, or a reinforcement part 322 of other structures.

It should be noted that the pressing plate 32 may be a stamped sheet metal part, or a machined metal block, which is not limited in this embodiment.

It should also be noted that the pressing plate 32 can be a pressing plate 32 that fixes one wedge-shaped structure 33 , or can be a pressing plate 32 that fixes two wedge-shaped structures 33 at the same time, which is not limited in this embodiment.

In one embodiment, two reinforcing parts 322 are provided, and the two reinforcing parts 322 are respectively located on opposite sides of the pressing part 321 .

In the embodiment of the present application, the two reinforcing parts 322 here may be flange structures, which may be formed by bending both sides of the pressing part 321 . The reinforcing part 322 may be perpendicular to the pressing part 321 . In one embodiment, the corners of the reinforcing part 322 and the pressing part 321 are rounded.

As shown in FIG. 18 , the embodiment of the present application also provides a vehicle 100 , including the battery pack 1 and the processor 1000 in any of the above embodiments. The battery pack 1 is disposed inside the vehicle 100 and electrically connected to the processor 1000 . The processor 1000 is used to control the charging and discharging of the battery pack 1 .

In the embodiment of the present application, the structure of the battery pack 1 is improved on the premise of ensuring that the vehicle uses the battery pack 1 as a power source for the vehicle having the above-mentioned battery pack 1 . The battery pack 1 includes a tray 10 and battery cells 20 accommodated in a cavity 101 of the tray 10 . There is a gap between the battery cell 20 and the side wall 1010 of the receiving cavity 101 (that is, there is a gap between the battery cell 20 and the inner side wall of the tray 10 ). A wedge-shaped structure 33 is embedded in this gap. By controlling the screw-in amount of the fixing member 31 , it is ensured that the wedge-shaped structure 33 can be in close contact with the battery cell 20 , so as to provide a certain restraint force for the battery cell 20 . Moreover, multiple fixing pieces 31 and multiple pressing plates 32 on the same wedge-shaped structure 33 can be independently adjusted, respectively controlling the screw-in amount of each fixing piece 31 to adapt to the situation of uneven clearance. The magnitude of the torque is used to control the binding force of the wedge-shaped structure 33 on the battery cell 20 . In the embodiment of the present application, by controlling the screw-in amount of the fixing member 31, the wedge-shaped structure 33 provides large surface constraints and support for the battery cell 20, has a fixed battery cell, limits the expansion of the battery cell, improves the structural reliability of the battery pack 1, and improves the battery life. Cycle life, beneficial effect of improving vehicle safety.

In this application, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense unless otherwise clearly specified and limited, for example, it may be a fixed connection or a detachable connection, Or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the present application, unless otherwise clearly specified and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that 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 reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims (17)

A battery pack (1), comprising: a tray (10), a battery cell (20) and a mounting assembly (30), wherein: The tray (10) has an accommodating chamber (101), the electric core (20) is accommodated in the accommodating chamber (101), and the electric core (20) and the side wall of the accommodating chamber (101) ( 1010) with a gap between them, the mounting assembly (30) is connected to the tray (10); and The mounting assembly (30) includes a wedge structure (33) and a pressing mechanism (300), the wedge structure (33) is connected to the pressing mechanism (300), and the wedge structure (33) at least partially fills The gap, the pressing mechanism (300) is detachably connected with the tray (10), the pressing mechanism (300) is used to adjust the distance between the wedge-shaped structure (33) and the accommodation cavity (101) The distance of the bottom wall (103). The battery pack (1) according to claim 1, characterized in that: the wedge-shaped structure (33) has a first inclined surface (330), and the side wall (1010) of the accommodating cavity (101) is close to the battery One side of the core (20) has a second inclined surface (102), and the first inclined surface (330) of the wedge-shaped structure (33) is connected with the second inclined surface (102) of the accommodating cavity (101). )Abut. The battery pack (1) according to claim 2, characterized in that: The second inclined surface (102) of the accommodation chamber (101) is inclined relative to the bottom wall (103) of the accommodation chamber (101), and the first inclined surface (330) of the wedge-shaped structure (33) ) is inclined relative to the bottom wall (103) of the receiving chamber (101); and Under the action of the pressing mechanism (300), the first inclined surface (330) of the wedge-shaped structure (33) can be sliding movement. The battery pack (1) according to claim 2 or 3, characterized in that: The side surface of the wedge-shaped structure (33) opposite to the first inclined surface (330) abuts against the battery core (20). The battery pack (1) according to claim 1, characterized in that: A partition structure (11) is arranged in the accommodation chamber (101), and the partition structure (11) divides the accommodation chamber (101) into at least two chambers (12); and The wedge-shaped structure (33) includes at least one wedge-shaped structure (33), the split structure (11) abuts against a part of the wedge-shaped structure (33) in the at least one wedge-shaped structure (33), and the split The structure (11) is an inclined surface at a position where it abuts against the first inclined surface (330). The battery pack (1) according to claims 1-3, characterized in that the pressing mechanism (300) comprises a fixing piece (31) and a pressing plate (32), and the fixing piece (31) presses the pressing plate (32) is pressed against said wedge-shaped structure (33). The battery pack (1) according to claim 6, characterized in that, the fixing member (31) extends through the pressing plate (32) and is threadedly connected with the tray (10), and the fixing member (31) It is used for adjusting the pressure exerted on the wedge-shaped structure (33) by adjusting the screw connection with the pressure plate (32). The battery pack (1) according to claim 6 or 7, characterized in that, the fixing member (31) is perpendicular to the pressing plate (32), and the fixing member (31) and the pressing plate (32) All are accommodated in the accommodating cavity (101). The battery pack (1) according to any one of claims 6-8, characterized in that, a relief groove (331) is provided at the matching position between the wedge-shaped structure (33) and the pressure plate (32), so that The pressing plate (32) is at least partially located in the relief groove (331). The battery pack (1) according to any one of claims 1-9, characterized in that: The wedge-shaped structure (33) includes a wedge-shaped housing (332) and a reinforcing plate (333), the wedge-shaped housing (332) encloses a wedge-shaped cavity, and the reinforcing plate (333) is arranged in the wedge-shaped cavity; The wedge-shaped housing (332) has a first wall (3321), a second wall (3322), a third wall (3323), and a fourth wall (3324), and the first wall (3321) and the first wall The two walls (3322) are arranged opposite; the third wall (3323) and the fourth wall (3324) are arranged opposite; and The third wall surface (3323) abuts against the pressing plate (32). The battery pack (1) according to claim 10, characterized in that: the first wall surface (3321) abuts against the first inclined surface (330) of the wedge-shaped structure (33), and the second The wall surface (3322) is in contact with the electric core (20). The battery pack (1) according to claim 10 or 11, characterized in that: The wedge-shaped structure (33) is provided with a rectangular cavity (33230), and the rectangular cavity (33230) is arranged on the side of the third wall (3323) away from the fourth wall (3324); and The rectangular cavity (33230) is provided with at least one relief groove (331), and the pressure plate (32) is partially accommodated in the relief groove (331) and abuts against the third wall surface (3323) . The battery pack (1) according to any one of claims 10-11, characterized in that, the first wall surface (3321) is inclined relative to the second wall surface (3322), and the second wall surface (3322) ) is provided with at least one exhaust hole (33221). The battery pack (1) according to any one of claims 6-13, characterized in that, the pressing plate (32) includes a pressing part (321) and a reinforcing part (322), and the pressing part (321 ) is connected to the reinforcing part (322), and the pressing part (321) abuts against the wedge-shaped structure (33). The battery pack (1) according to claim 14, characterized in that two reinforcing parts (322) are provided, and the two reinforcing parts (322) are respectively located opposite to the pressing part (321). sides. The battery pack (1) according to any one of claims 1 to 15, characterized in that, the battery cells (20) are sandwiched between at least two wedge-shaped structures (33). A vehicle (100), characterized by comprising a battery pack (1) and a processor (1000) according to any one of claims 1 to 16, the battery pack (1) being arranged in the vehicle ( 100) and is electrically connected to the processor (1000), and the processor (1000) is used to control the charging and discharging of the battery pack 1.

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