CN217848208U - Battery pack - Google Patents

Abstract

The present disclosure relates to the field of battery technology, and in particular to a battery pack, the battery pack comprising: the battery management system comprises a box body, a first plug connector and a second plug connector, wherein the box body comprises a box cover, the box cover comprises a cover main body and a bulge part, and the bulge part is used for accommodating the battery management system; the first plug connector is arranged on the cover main body; the second plug connector is arranged on the cover main body, the first plug connector and the second plug connector are positioned on the same side of the protruding portion, and the plugging direction of the first plug connector is different from that of the second plug connector. The problem of the battery package atress on same direction too big when first plug connector and second plug connector plug has been avoided, has solved the battery and has contained the problem of easy deformation, promotes the connection stability of battery package.

Description

Battery pack

Technical Field

The disclosure relates to the technical field of batteries, in particular to a battery pack.

Background

With the development and progress of technology, electric vehicles are increasingly used. A battery pack is provided in an electric vehicle for storing electric energy and supplying energy to the electric vehicle. A plurality of plug connectors are often provided on the battery pack, and the plug connectors are used for connecting devices such as an external plug. When the plug connector, the plug and other devices are plugged, the battery pack is easy to deform under stress.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of this disclosure is to provide a battery package, and then solve the easy problem of deformation of battery package to at least a certain extent, promote the connection stability of battery package.

The present disclosure provides a battery pack, the battery pack including:

a case comprising a case cover comprising a cover main body and a bulge for housing a battery management system;

the first plug connector is arranged on the cover main body;

the second plug connector, the second plug connector is located the lid main part, and first plug connector with the second plug connector is located the homonymy of uplift portion, the plug direction of first plug connector with the plug direction of second plug connector is different.

The battery pack provided by the embodiment of the disclosure is provided with the bulge part for accommodating the battery management system on the box cover, the first plug connector and the second plug connector are arranged at the same side of the bulge part, and the plugging direction of the first plug connector is different from that of the second plug connector, so that the problem that the stress of the battery pack is too large in the same direction when the first plug connector and the second plug connector are plugged is avoided, the problem that the battery pack is easy to deform is solved, and the connection stability of the battery pack is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

Fig. 1 is a schematic structural diagram of a battery pack provided in an exemplary embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of another battery pack provided in an exemplary embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a lower case provided in an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a base plate according to an exemplary embodiment of the present disclosure;

fig. 5 is a partial structural schematic view of a battery pack according to an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a battery mounting plate provided in an exemplary embodiment of the present disclosure;

fig. 7 is a partial structural schematic view of another battery pack provided in an exemplary embodiment of the present disclosure;

FIG. 8 is a schematic structural view of a support provided in an exemplary embodiment of the present disclosure;

fig. 9 is a schematic structural view of another support provided in an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, so it should be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the" object or "an" object are also intended to mean one of possibly multiple such objects.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in the context of a connection between one element or feature and another element(s), "on," "under," or "inside" or "outside," it can be directly connected to the other element(s) "on," "under" or "inside" or "outside," or indirectly connected to the other element(s) "on," "under" or "inside" or "outside" through intervening elements.

The present exemplary embodiment provides a battery pack, as shown in fig. 1 and 2, the battery pack includes a case 10, a first connector 21, and a second connector 22, the case 10 includes a case cover 12, the case cover 12 includes a cover main body 121 and a protrusion 122, and the protrusion 122 is used for accommodating a battery management system; the first plug-in unit 21 is provided in the cover main body 121; the second connector 22 is provided on the cover main body 122, the first connector 21 and the second connector 22 are located on the same side of the protruding portion 122, and the insertion and removal direction of the first connector 21 is different from that of the second connector 22.

The battery pack provided by the embodiment of the disclosure is provided with the bulge part 122 for accommodating the battery management system on the box cover 10, the first plug connector 21 and the second plug connector 22 are arranged at the same side of the bulge part 122, and the plugging direction of the first plug connector 21 is different from that of the second plug connector 22, so that the problem that the stress of the battery pack is too large in the same direction when the first plug connector 21 and the second plug connector 22 are plugged is avoided, the problem that the battery pack is easy to deform is solved, and the connection stability of the battery pack is improved.

Further, the battery pack provided by the embodiment of the present disclosure may further include a battery, a battery mounting plate 60, a battery management system 70, a BMS mounting bracket 50, and a support 40, wherein the battery, the battery mounting plate 60, the battery management system 70, the BMS mounting bracket 50, and the support 40 are disposed inside the case 10, and the battery is mounted on the battery mounting plate 60. The support member 40 is provided at a side of the battery away from the battery mounting plate 60, the support member 40 can be coupled to the battery or the housing 10, the BMS mounting bracket 50 is provided at the support bracket 40, and the battery management system 70 is mounted at the BMS mounting bracket 50.

The box 10 has a receiving space therein for receiving a battery, a bus bar, a circuit board, and other components. The box body 10 may include a lower box body 11 and a box cover 12, wherein an opening is formed at the top of the lower box body 11, and the box cover 12 is connected to the opening of the lower box body 11 to close the opening of the lower box body 11, so as to form a closed accommodating space.

As shown in fig. 3, the lower case 11 may include a bottom plate 111 and a rim 112, and the rim 112 and the bottom plate 111 are connected to form an accommodating space having an opening at a top side of the bottom plate 111. The frame 112 is a ring structure, and the frame 112 may surround the bottom plate 111, or the frame 112 may be connected to the top surface of the bottom plate 111.

Illustratively, the bezel 112 may include a first side panel 101, a third side panel 102, a second side panel 103, and a fourth side panel 104 that are joined end-to-end. The first side plate 101 and the second side plate 103 are parallel, the third side plate 102 and the fourth side plate 104 are parallel, the first side plate 101, the third side plate 102, the second side plate 103 and the fourth side plate 104 form a rectangular frame, and the bottoms of the first side plate 101, the third side plate 102, the second side plate 103 and the fourth side plate 104 are respectively connected with the bottom plate 111.

The first side plate 101, the second side plate 103, the third side plate 102 and the fourth side plate 104 are all rectangular or approximately rectangular structures, the first side plate 101, the second side plate 103, the third side plate 102 and the fourth side plate 104 are the same in height, the lower edges of the first side plate 101, the second side plate 103, the third side plate 102 and the fourth side plate 104 are flush with the bottom plate 111, and the upper edges of the first side plate 101, the second side plate 103, the third side plate 102 and the fourth side plate 104 are connected with the box cover 12.

In the embodiment of the present disclosure, the frame 112 and the bottom plate 111 may be a split structure, and in this case, the frame 112 and the bottom plate 111 may be connected by welding, bolting, riveting, or gluing. Or the frame 112 and the bottom plate 111 may be of an integrated structure, for example, the lower box 11 may be integrally formed by casting, stamping, or bending a metal plate.

As shown in fig. 4, the bottom plate 111 may include a plate main body 1111 and an escape portion 1112, the escape portion 1112 is disposed on the plate main body 1111, and the escape portion 1112 forms a protrusion on a side of the bottom plate 111 close to the accommodating space and a recess on a side of the bottom plate 111 far from the accommodating space. That is, the bottom plate 111 may have a zigzag structure. The relief 1112 is used to form a relief space for mounting a support member 40 (e.g., a support beam) to provide support to the battery pack when the battery pack is mounted to the vehicle frame.

The relief portion 1112 penetrates through the bottom plate 111, that is, the relief portion 1112 extends from a first edge of the bottom plate 111 to a second edge of the bottom plate 111, the first edge of the bottom plate 111 is an edge of the bottom plate 111 in the length direction, and the second edge of the bottom plate 111 is an edge parallel to the first edge of the bottom plate 111. Of course, in practical applications, the first edge of the bottom plate 111 may also be an edge of the bottom plate 111 in the width direction, and the embodiment of the disclosure is not limited thereto.

The avoiding portion 1112 divides the plate main body 1111 into two parts, for example, the avoiding portion 1112 may divide the plate main body 1111 into a first plate main body and a second plate main body, and the first plate main body and the second plate main body are connected to both sides of the avoiding portion 1112, respectively.

In the embodiment of the present disclosure, the avoiding portion 1112 may be disposed in a middle region of the bottom plate 111, the first plate body and the second plate body separated by the avoiding portion 1112 may be the same, and the avoiding portion 1112 separates the plate body 1111 into two identical parts, which is beneficial to maintaining the balance of the battery pack.

The recess formed by the relief portion 1112 at the bottom of the bottom plate 111 may be a rectangular parallelepiped groove. The bypass portion 1112 may include a first bypass wall, a second bypass wall, and a bypass roof, the first and second bypass walls being arranged in parallel, and the first and second bypass walls being perpendicular to the plate main body 1111. The avoidance top is arranged between the first avoidance wall and the second avoidance wall, the avoidance top is respectively connected with the top of the first avoidance wall and the top of the second avoidance wall, and the avoidance top and the plate main body 1111 are arranged in parallel.

The width of the relief portion 1112 is 50mm to 200mm, and the width of the relief portion 1112 is the dimension of the relief portion 1112 along the first edge direction of the base plate 111. That is, the distance between the first avoidance wall and the second avoidance wall is 50mm-200mm. For example, the width of the relief 1112 is 50mm, 55mm, 90mm, 108mm, 150mm, or 200mm.

The height of the avoiding portion 1112 is 5mm-50mm, and the height of the avoiding portion 1112 is the distance between the surface of the avoiding portion 1112 far from the plate main body 1111 and the plate main body 1111. Namely, the distance between the plate main body 1111 and the avoidance top is 5mm-50mm. For example, the height of the escape portion 1112 is 5mm, 8mm, 10mm, 25mm, 40mm, or 50mm, etc.

By way of example, the base plate 111 may be a rectangular or approximately rectangular structure, and the base plate 111 has a first edge, a third edge, a second edge, and a fourth edge that are connected end to end, the first edge and the second edge being parallel, and the third edge and the fourth edge being parallel. The first side panel 101 of the bezel 112 is connected to the first edge, the second side panel 103 is connected to the second edge, the third side panel 102 is connected to the third edge, and the fourth side panel 104 is connected to the fourth edge. The extending direction of the avoiding portion 1112 may be perpendicular to the first edge of the bottom plate 111.

The avoiding portion 1112 intersects the frame 112, and an avoiding notch is provided at a position of the frame 112 intersecting the avoiding portion 1112. For example, the escape part 1112 extends from the first edge to the second edge of the bottom plate 111, and in this case, an escape notch is provided on both the first side plate 101 and the second side plate 103 of the side frame 112. The size of the avoidance gap is the same as that of the avoidance portion 1112, for example, the width of the avoidance gap is 50mm to 200mm, and the height of the avoidance gap is 5mm to 50mm.

As shown in fig. 5, a battery mounting plate 60 is disposed in the accommodating space, the battery mounting plate 60 is used for mounting a battery, and the battery can be mounted on a side of the battery mounting plate 60 away from the bottom plate 111. The battery mounting plate 60 and the bottom plate 111 have a preset interval therebetween to form an accommodating chamber 14 between the bottom plate 111 and the battery mounting plate 60, and the accommodating chamber 14 is used for accommodating gas and liquid ejected from the battery when the thermal runaway of the battery occurs.

The battery mounting plate 60 may be attached to the frame 112, for example, the convex beam 16 may be provided on the inner side wall of the frame 112, and the battery mounting plate 60 may be provided on the top surface of the convex beam 16. The battery mounting plate 60 may be attached to the top surface of the flange 16, or the battery mounting plate 60 may be connected to the flange 16 by bolting, welding, riveting, or gluing.

In the embodiment of the present disclosure, the preset distance between the battery mounting plate 60 and the bottom plate 111 may be 30mm to 45mm, for example, the distance between the battery mounting plate 60 and the bottom plate 111 may be 30mm, 35mm, 38mm, 40mm, 45mm, or the like.

It should be noted that, when the bottom plate 111 includes the plate main body 1111 and the relief portion 1112, the distance from the battery mounting plate 60 to the bottom plate 111 in the embodiment of the present disclosure is the distance from the plate main body 1111 to the battery mounting plate 60. I.e., the distance from the battery mounting plate 60 to the bottom plate 111, the top surface of the plate body 1111 to the bottom surface of the battery mounting plate 60.

The battery has a first explosion-proof valve provided on the side of the battery facing the battery mounting plate 60. The first explosion-proof valve is exploded when thermal runaway occurs inside the battery to vent the pressure inside the battery. As shown in fig. 6, a safety area 602 may be provided on the battery mounting plate 60, and the safety area 602 is used to form a passage for communicating with the receiving chamber 14 below the battery mounting plate 60 after the first explosion-proof valve is exploded. The projection of the first explosion proof valve onto the battery mounting plate 60 at least partially coincides with the safety zone 602.

The battery mounting plate 60 may include a functional area 601 and a safety area 602, the functional area 601 is used for connecting a battery, for example, a structural adhesive may be coated on the functional area 601, and the battery is adhered to the battery mounting plate 60 by the structural adhesive. The functional area 601 surrounds the security area 602, and the security area 602 may be a through hole or a thinned area. When the safety area 602 is a through hole, the gas and liquid ejected after the first explosion-proof valve is exploded passes through the through hole and enters the accommodating chamber 14 below the battery mounting plate 60. When the safety area 602 is a weak area, the weak area is destroyed by the gas and liquid ejected after the first explosion-proof valve is exploded, so as to form a pressure relief channel, and the pressure relief channel is communicated with the accommodating cavity 14 below the battery mounting plate 60. For example, the weakened area may be a low melting point or low strength sheet formed in the security zone 602.

The functional area 601 of the battery mounting plate 60 is provided with structural adhesive, and in order to avoid the structural adhesive from flowing to the safety area 602, the battery pack provided by the embodiment of the disclosure may further include a blocking member, the blocking member is disposed on one side of the battery mounting plate 60 away from the bottom plate 111, the blocking member surrounds the safety area 602, and the blocking member can block the structural adhesive from entering the safety area 602.

The blocking member may be integrated with the battery mounting plate 60, for example, the blocking member is a protrusion disposed at the edge of the safety zone 602. Alternatively, the blocking member may be a separate structure from the battery mounting plate 60, for example, a ring of foam may be disposed at the edge of the safety zone 602 to form the blocking member. Preferably, the blocking member is made of a flexible material, blocks the structural adhesive when the battery is not mounted, and is equal to or higher than the structural adhesive layer, and the battery compresses the blocking member when the battery is mounted on the battery mounting plate 60, so that the battery and the structural adhesive layer are in close contact with the battery.

The safety zones 602 on the battery mounting plate 60 may have a one-to-one correspondence with the blocking members, i.e., each safety zone 602 has a blocking member disposed around the edge of the safety zone 602. When the safety zone 602 is a rectangular or approximately rectangular structure, the barrier may be a rectangular or approximately rectangular ring-like structure.

The battery pack in the embodiment of the present disclosure may include a plurality of batteries, and the plurality of batteries may be distributed in a plurality of rows. Therefore, a plurality of safety areas 602 can be correspondingly arranged on the battery mounting plate 60, one safety area 602 corresponds to one row of batteries, and the orthographic projections of the explosion-proof valves of the batteries in the row of batteries on the battery mounting plate 60 are all positioned in the safety area corresponding to the row of batteries. For example, the security zone 602 may be a rectangular or approximately rectangular area.

At least one first reinforcing beam 17 can be arranged in the accommodating cavity 14, and the accommodating cavity 14 is divided into a plurality of sub-accommodating cavities by the first reinforcing beam 17, and each sub-accommodating cavity corresponds to at least one row of battery packs. For example, each sub-receiving cavity may correspond to a row of batteries, and the orthographic projection area of the safety zone 602 corresponding to the row of batteries on the bottom plate 111 is located in the corresponding sub-receiving cavity. The accommodating cavity 14 is divided into a plurality of sub-accommodating cavities through the first reinforcing beam 17, each sub-accommodating cavity corresponds to one row of batteries, so that high-temperature gas and liquid sprayed out due to thermal runaway of one row of batteries are restricted to the corresponding sub-accommodating cavity, and the influence of the high-temperature gas and the liquid on other rows of batteries is avoided.

The bottom surface of the first reinforcing beam 17 may be in contact with the bottom plate 111, the top surface of the first reinforcing beam 17 may be in contact with the battery mounting plate 60, the first reinforcing beam 17 may reinforce the strength of the bottom plate 111, and the first reinforcing beam 17 may also serve to support the battery mounting plate 60. The first reinforcing beam 17 and the escape 1112 may be arranged in parallel, and the first reinforcing beam 17 traverses the floor 111.

The first reinforcing beam 17 and the bottom plate 111 may be connected by welding, bolting, riveting, or gluing. The battery mounting plate 60 may be lapped on the first reinforcing beam 17, or the battery mounting plate 60 may be connected to the first reinforcing beam 17 by bolting, welding, riveting, or gluing.

The outside of the battery box 10 can be provided with a second stiffening beam 13, the second stiffening beam 13 is provided with a hoisting hole, and the hoisting hole is used for hoisting a battery pack. Can promote the intensity of box 10 on the one hand through second stiffening beam 13, on the other hand provides the hole for hoist setting structure, is convenient for arrange the hole for hoist.

For example, the second reinforcing beam 13 may be respectively disposed at an outer side of the third side panel 102 and an outer side of the fourth side panel 104 of the bezel 112. Of course, in practical applications, the second reinforcing beam 13 may also be disposed outside the first side plate 101 and the second side plate 103, and the embodiment of the present disclosure is not limited thereto.

After the first explosion-proof valve is exploded, high-temperature gas and liquid in the battery enter the accommodating chamber 14 below the battery mounting plate 60. That is, high-temperature gas and liquid ejected from the battery may contact the bottom plate 111, and in order to prevent the bottom plate 111 from being damaged (melted or corroded, etc.), the battery pack provided in the embodiment of the present disclosure may further include a fireproof layer provided on a surface of the bottom plate 111 adjacent to the battery mounting plate 60. The fireproof layer may be formed by fireproof cotton, and certainly, in practical applications, the material of the fireproof layer may also be a material such as ceramic, which is not specifically limited in this disclosure.

Further, in order to avoid the temperature in the accommodating cavity 14 from being too high, the battery pack provided by the embodiment of the disclosure may further include a second explosion-proof valve 15, the second explosion-proof valve 15 is disposed on the frame 112, and at least a portion of the second explosion-proof valve 15 is opposite to the accommodating cavity 14. After the first explosion-proof valve bursts, the pressure in the accommodating chamber 14 will rise, and at this moment, the second explosion-proof valve 15 bursts to avoid the pressure in the accommodating chamber 14 from being too high.

A plurality of second explosion-proof valves 15 may be included in the battery pack, for example, the second explosion-proof valves 15 correspond to the sub-receiving cavities one to one. Of course, in practical applications, one second explosion-proof valve 15 may also correspond to a plurality of sub-receiving cavities, and the embodiment of the disclosure is not limited thereto. The second explosion-proof valve 15 may be provided in a region of the first side plate 101 near the bottom edge, or the second explosion-proof valve 15 may be provided in a region of the second side plate 103 near the bottom edge.

In one possible embodiment of the present disclosure, the battery mounting plate 60 and the cooling device 61 are common. That is, the cooling device 61 may be used as the battery mounting plate 60, and for example, the cooling device 61 may be a liquid cooling plate. The cooling device 61 is disposed in the accommodating space of the box 10, and a predetermined gap is formed between the cooling device 61 and the bottom plate 111 to form the accommodating chamber 14. The battery is bonded to the side of the cooling device 61 remote from the base plate 111. Through regard as battery mounting panel 60 with cooling device 61, can practice thrift the device quantity in the battery package on the one hand to improve the energy density of battery package, on the other hand cooling device 61 locates the top of holding chamber 14, can cool down it fast through cooling device 61 in battery thermal runaway back high temperature gas and liquid get into holding chamber 14, avoid the high temperature and the potential safety hazard that arouses.

A convex beam 16 may be disposed on an inner sidewall of the frame 112, and the cooling device 61 is connected to the frame 112 through the convex beam 16. The cooling device 61 may be attached to the top surface of the flange 16, or the cooling device 61 may be connected to the flange 16 by bolting, welding, riveting or gluing.

The cooling device 61 can cool a cooling zone (a functional zone 601) in which a cooling liquid pipe is provided and a safety zone 602 in which no cooling liquid pipe is provided. The projection of the first explosion-proof valve on the battery on the cooling device 61 does not coincide with the cooling zone.

Can coat heat conduction structure glue on the cooling zone, utilize heat conduction structure glue to bond the battery in battery mounting panel 60, heat conduction structure glue on the one hand can connect battery and cooling device 61, and on the other hand heat conduction structure glue also can be with the heat of battery conduct to cooling device 61 fast. The cooling region surrounds the safety region 602, and the safety region 602 may be a through hole or a thinned region. When the safety area 602 is a through hole, the gas and liquid ejected after the first explosion-proof valve is exploded enters the accommodating cavity 14 below the cooling device 61 through the through hole. When the safety area 602 is a weak area, the weak area is damaged by the gas and liquid ejected after the first explosion-proof valve is exploded, so as to form a pressure relief channel, and the pressure relief channel is communicated with the accommodating cavity 14 below the cooling device 61.

The cooling device 61 is provided with a cooling liquid port, the cooling liquid port is arranged on one side of the cooling device 61 facing the bottom plate 111, and the cooling liquid port is used for transmitting a cooling medium. For example, when the cooling device 61 is a liquid cooling plate, the liquid cooling plate is provided with a liquid inlet and outlet (cooling liquid port), and the liquid inlet and outlet is disposed on a side of the liquid cooling plate away from the battery. Through locating cooling device 61 with the coolant liquid mouth and being close to one side of bottom plate 111, realized the isolation of coolant liquid and battery, danger such as the short circuit is caused in coolant liquid and battery contact when avoiding the weeping, promotes the security performance of battery package.

The cooling liquid port is at least partially located in the accommodating cavity 14, for example, the cooling liquid port is completely located in the accommodating cavity 14. That is, the coolant does not at least partially overlap the escape 1112 and the first reinforcement beam 17. Through locating the coolant liquid mouth with the position that the holding chamber 14 corresponds, avoid dodging portion 1112 or first stiffening beam 17 to influence the connection of coolant liquid mouth and outside coolant liquid pipeline, be convenient for connect outside coolant liquid pipeline, be favorable to promoting assembly efficiency.

In an embodiment of the present disclosure, the liquid cooling plate is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both disposed on one side of the liquid cooling plate facing the bottom plate 111. The liquid inlet is located the liquid cooling plate bottom and is close to first end position, and the liquid outlet is located the liquid cooling plate bottom and is close to the position of second end.

The cover 12 includes a cover main body 121 and a raised portion 122, the raised portion 122 forms a protrusion on a side of the cover 12 away from the battery and a receiving recess on a side of the cover 12 close to the battery, and the raised portion 122 is used for receiving the battery management system 70.

The protrusion 122 has at least one inclined surface, the inclined surface is a surface of the protrusion 122 connected to the cover body 121, and a dihedral angle between the inclined surface and the top surface of the cover body 121 is an obtuse angle. For example, the dihedral angle of the inclined surface and the top surface of the cover main body 121 may be 120 degrees, 135 degrees, 150 degrees, or the like.

Through set up on uplift portion 122 and cover the dihedral angle of main part 121 top surface and be the obtuse inclined plane, can avoid uplift portion 122 to form stress concentration to increased the intensity of uplift portion 122, avoided uplift portion 122 to be destroyed, and then damaged battery management system 70's risk, promoted the security of battery package.

The top surface of the cover body 121 is a flat surface, and the ridge portion 122 protrudes from the top surface of the cover body 121. The top surface of the cover main body 121 may be disposed in parallel with the plate main body 1111 of the lower case 11. The cover main body 121 is connected to the lower case 11, wherein the cover main body 121 and the lower case 11 may be connected by welding, riveting, bolting, clamping, or gluing.

Illustratively, the cover main body 121 and the lower case 11 are connected by bolts, a plurality of connection holes may be provided at the edge of the cover main body 121, and screw holes are provided at corresponding positions on the lower case 11, and the bolts pass through the connection holes on the cover main body 121 and are connected with the lower case 11.

The protrusion 122 may include a first face 211 and a plurality of second faces 212, the first face 211 of the protrusion 122 being disposed opposite the top surface of the cover body 121, e.g., the first face 211 being disposed parallel or approximately parallel to the top surface of the cover body 121. The plurality of second faces 212 are provided between the first face 211 and the top face of the cover main body 121, the plurality of second faces 212 are formed to surround the first face 211, and the second faces 212 respectively connect the first face 211 and the top face of the cover main body 121. At least one second surface 212 of the plurality of second surfaces 212 is an inclined surface.

The second surfaces 212 are sequentially connected end to form a ring-shaped or approximately ring-shaped structure. The first surface 211 is disposed at one end of the annular structure, and the cover body 121 is disposed at the other end of the annular structure. A part of the second surfaces 212 of the plurality of second surfaces 212 is an inclined surface, and the remaining second surfaces 212 of the plurality of second surfaces 212 may be disposed perpendicular to the top surface of the cap body 121. Of course, in practical applications, all of the second surfaces 212 may be inclined surfaces, which is not limited in the embodiments of the present disclosure.

For example, the ridge 122 may include four second faces 212, and the four second faces 212 are connected end to end in sequence. The first surface 211 has a rectangular or approximately rectangular configuration, and each of the second surfaces 212 is connected to one side of the first surface 211. The second surface 212 to which the long sides of the first surface 211 are connected may be an inclined surface. The second surface 212 to which both long sides of the first surface 211 are connected may be both inclined surfaces, or one of them may be an inclined surface. The second surface 212 corresponding to the long side of the first surface 211 is provided as an inclined surface, whereby the area of the inclined surface can be ensured, and the strength of the ridge portion 122 can be further ensured.

In order to further increase the strength of the ridge portion 122, a reinforcing structure 123 may be provided on the inclined surface, and the strength of the ridge portion 122 may be increased by the reinforcing structure 123. The reinforcing structure 123 can increase the deformation resistance of the bump 122, thereby avoiding the bump 122 from deforming and damaging the power management system.

The reinforcing structure 123 may be a protrusion on the inclined surface, for example, a protrusion structure may be formed on the side of the inclined surface away from the battery by stamping, and the strength of the inclined surface is enhanced by the protrusion structure. Alternatively, the reinforcing structure 123 may be another structure, for example, the reinforcing structure 123 is a rib disposed on an inclined surface, and the embodiment of the disclosure is not particularly limited in this respect.

The first plug connector 21 and the second plug connector 22 are arranged at the top of the box cover 12, and the first plug connector 21 and the second plug connector 22 are used for connecting external plug connectors to transmit high-voltage signals and low-voltage signals. For example, the first connector 21 is used for connecting a high-voltage signal line to transmit a high-voltage signal (a power signal during charging and discharging), and the second connector 22 is used for connecting a low-voltage signal line to transmit a low-voltage signal (a control signal, such as a temperature signal and a power signal).

The top of the case cover 12 may be provided with a first mating portion 201 and a second mating portion 202, the first connector 21 is mounted on the first mating portion 201, and the second connector 22 is mounted on the second mating portion 202.

The first connector 21 and the second connector 22 are located on the same side of the protruding portion 122, and the insertion and extraction direction of the first connector 21 and the insertion and extraction direction of the second connector 22 are different. For example, the insertion and extraction direction of the first connector 21 is perpendicular to the insertion and extraction direction of the second connector 22.

The plugging and unplugging directions of the first plug connector 21 and the second plug connector 22 are set to different directions, so that the acting force on the box cover 12 in one direction and the stress cycle times during plugging and unplugging of the plug connectors can be reduced, and the connection stability of the plug connectors is improved.

The first mating portion 201 and the second mating portion 202 are disposed on the same side of the protrusion 122, the first mating portion 201 has a first mounting surface, the second mating portion 202 has a second mounting surface, and the first mounting surface and the second mounting surface are disposed vertically. The first connector 21 is connected to the first mounting surface, and the insertion and extraction direction of the first connector 21 is perpendicular to the first mounting surface, the second connector 22 is connected to the second mounting surface, and the insertion and extraction direction of the second connector 22 is perpendicular to the second mounting surface. That is, the insertion/removal direction of the first connector 21 is perpendicular to the insertion/removal direction of the second connector 22.

Optionally, the battery pack provided by the embodiment of the present disclosure may further include a plug-in mounting component 80, where the plug-in mounting component 80 is disposed on a side of the case cover 12 close to the battery, and the plug-in mounting component 80 has a first mounting surface and a second mounting surface, the first mounting surface is connected to the first plug-in component 21, the second mounting surface is connected to the second plug-in component 22, and an included angle is formed between the first mounting surface and the second mounting surface.

The cover body 121 may be provided with an insertion protrusion, which forms a recess on a side of the cover body 121 facing the battery, the insertion protrusion is provided at one end of the protrusion 122, and the insertion mounting member is provided in the recess formed by the insertion protrusion.

The socket mounting member 80 may include a first connection plate 81 and a second connection plate 82, the first connection plate 81 and the cover main body 121 being arranged in parallel, the first connection plate 81 being connected to the BMS mounting bracket 50 through the support plate, and a first mounting surface being a surface of the first connection plate 81 remote from the BMS mounting bracket 50. The first connection plate 81 and the bump 122 have a gap therebetween due to the predetermined distance, that is, the gap between the first connection plate 81 and the bump 122. The second connecting plate 82 is perpendicularly connected to the BMS mounting bracket 50 and the second connecting plate 82 may be disposed opposite to an end surface of the protrusion 122, and a surface of the second connecting plate 82 remote from the protrusion 122 is a second mounting surface.

The first and second connectors 21 and 22 can be connected to the plug mount 80 with the first and second connectors 21 and 22 passing through the plug bosses on the cover body 121 so that the plug openings of the first and second connectors 21 and 22 are exposed to the outside of the cover 12. For example, the socket of the first socket 21 faces the direction of the lid main body away from the battery, and the socket of the second socket 22 faces the direction of the protrusion.

The inserting projection part is provided with a first cover plate arranged in parallel with the first installing surface and a second cover plate arranged in parallel with the second installing surface, a first piece passing hole is formed in the first cover plate, the first inserting piece 21 penetrates through the first piece passing hole, a second piece passing hole is formed in the second cover plate, and the second inserting piece 22 penetrates through the second piece passing hole.

The insertion protrusion and the protrusion 122 may be an integral structure, for example, the insertion protrusion and the protrusion 122 may be formed on a side of the cover main body 121 away from the battery by stamping or the like. Or the insertion protrusion may be connected to the cover main body 121 by welding or bolting, which is not limited in the embodiment of the disclosure.

When the plug boss and the raised portion 122 are of an integral structure, the second cover plate on the plug boss may be common to the end plate 31 of the raised portion 122, that is, the second connector 22 may be disposed on the end plate 31 of the raised portion 122. Of course, in practical applications, the second cover plate may also be a separate cover plate, and the embodiment of the disclosure is not limited thereto.

The height of grafting bellying is less than the height of bellying 122, and the bellied width of grafting is less than the width of bellying 122, avoids the grafting bellying to occupy too much space to make the tip of bellying 122 have the headspace, in order to hold the plug connector.

The battery pack provided by the embodiment of the present disclosure may include a plurality of rows of batteries, and the plurality of rows of batteries are sequentially arranged in the accommodating space of the box body 10. In one embodiment, each row of batteries may be a battery module 30, that is, a plurality of battery modules 30 may be disposed in the battery pack.

The battery module 30 may include a plurality of cells arranged in sequence in the battery module 30, and end plates 31 provided at both ends of the plurality of cells in the cell arrangement direction, respectively, and end plates 31. The plurality of cells are sequentially stacked, and a connection paste may be disposed between the adjacent cells, by which the adjacent cells are connected.

The plurality of battery modules 30 are respectively disposed in the accommodating spaces of the case 10, and the battery modules 30 may be mounted on the battery mounting plate 60. The battery in the battery module 30 is provided with first explosion-proof valve towards the one end of battery mounting panel 60, and the first explosion-proof valve of a plurality of batteries is located collinear, and the safe zone 602 on first explosion-proof valve and the battery mounting panel 60 corresponds, and the sub-accommodation chamber below safe zone 602 and the battery mounting panel 60 corresponds, and every battery module 30 can correspond a sub-accommodation chamber.

The battery can include devices such as casing, electric core and utmost point post, and the casing is located to the electric core, and the casing is located to utmost point post, utmost point post and the utmost point ear connection on the electric core. The first explosion proof valve is provided in the housing, for example, the first explosion proof valve may be formed by a thinned area in the housing.

The BMS mounting bracket 50 is used to mount the battery management system 70, the first connector 21 and the second connector 22, and the BMS mounting bracket 50 is provided at a side of the battery module 30 away from the base plate 111. As shown in fig. 8, in order to fix the BMS mounting bracket 50, a support member 40 is further provided in the battery pack, the support member 40 may be connected with the battery module 30, the BMS mounting bracket 50 is located at a side of the support member 40 away from the base plate 111, and the BMS mounting bracket 50 is connected with the support member 40.

Wherein the support member 40 may be disposed between the adjacent battery modules 30, and the support member 40 is connected with the battery modules 30 adjacent thereto. The battery pack includes a plurality of support members 40, and one support member 40 is disposed between adjacent two battery modules 30.

As shown in fig. 8, the support member 40 may include a support body 41, an end plate connection portion 42, and a mounting plate connection portion 43, the end plate connection portion 42 being provided at an end of the support body 41, the end plate connection portion 42 being connected with the end plate 31; the mounting plate connection part 43 is provided at a side of the support body 41 away from the lower case 11, and the mounting plate connection part 43 is connected to the BMS mounting bracket 50.

The support main 41 may extend from one end of the battery module 30 to the other end of the battery module 30, both ends of the support main 41 are provided with end plate connection parts 42, and the end plate connection parts 42 at both ends of the support main 41 are connected to the end plates 31 at both ends of the battery module 30, respectively.

In one possible embodiment of the present disclosure, as shown in fig. 9, the end plate connection part 42 may be connected to the end plates 31 of two battery modules 30 adjacent thereto. For example, the end plate connection part 42 may include a first sub-connection part 421 and a second sub-connection part 422, the first sub-connection part 421 and the second sub-connection part 422 being located at both sides of the support body 41, respectively. The first sub-connecting portion 421 is connected to the end plate 31 of the first battery module 30, and the second sub-connecting portion 422 is connected to the end plate 31 of the second electromagnetic module. The first and second battery modules 30 and 30 are battery modules 30 adjacent to the support body 41 on both sides of the support body 41, respectively.

The end plate connection part 42 is provided with a first connection hole connected to the end plate 31 of the first battery module 30 and a second connection hole connected to the end plate 31 of the second battery module 30. The first connection hole is disposed in the first sub-connection portion 421, and the second connection hole is disposed in the second sub-connection portion 422.

In another possible embodiment of the present disclosure, as shown in fig. 8, the end plate connection part 42 may be connected to one end plate 31 of the battery module 30, and in this case, the end plate connection part 42 may be provided at one side of the support body 41. The end plate connecting portions 42 at both ends of the supporting body 41 are respectively a first end plate connecting portion and a second end plate connecting portion, which are respectively located at both sides of the supporting body 41. That is, the first end plate connection part extends toward the side of the support body 41 near the first battery module 30, the first end plate connection part is connected to the end plate 31 of the first battery module 30, the second end plate connection part extends toward the side of the support body 41 near the second battery module 30, and the second end plate connection part is connected to the end plate 31 of the second battery module 30. Of course, in practical applications, the first end plate connection portion and the second end plate connection portion may also be located on the same side of the support main body 41, and the embodiment of the disclosure is not limited thereto.

The support body 41 may have a thin plate structure, and the thin plate structure of the support body 41 occupies a small space between the battery modules 30, which is advantageous to arrange more batteries in a limited space, thereby increasing the energy density of the battery pack.

The support body 41 is a thin plate structure, and the support body 41 is disposed perpendicular to the bottom plate 111. The end plate connection portion 42 is provided at an end portion of the main body, and the end plate connection portion 42 has a flat plate structure, and the end plate connection portion 42 may be disposed in parallel with the bottom plate 111. The mounting plate connection part 43 is provided on the side of the support body 41 away from the battery module 30, the mounting plate connection part 43 is of a flat plate structure, and the mounting plate connection part 43 may be disposed in parallel with the bottom plate 111.

In the embodiment of the present disclosure, the supporting body 41, the end plate connecting portion 42 and the mounting plate connecting portion 43 may be an integral structure, for example, the supporting member 40 may be formed by bending a sheet metal, that is, the end plate connecting portion 42 and the mounting plate connecting portion 43 may be bent portions on the supporting body 41. Or the support main body 41, the end plate connection portion 42, and the mounting plate connection portion 43 may be a split structure, and the end plate connection portion 42 and the mounting plate connection portion 43 are welded to the support main body 41.

The end plate connecting portion 42 and the end plate 31 may be connected by a connecting member which passes through a mounting hole in a mounting plate of the end plate 31 to be connected to the end plate 31. Further, a connector may penetrate the end plate 31, and the connector is connected to the case 10. The fixed connection of the support member 40, the battery module 30 and the box body 10 is realized through one-time connection, which is beneficial to saving the production process and improving the production efficiency.

Illustratively, the connecting member may be a bolt, that is, the end plate connecting portion 42 and the end plate 31 are connected by a bolt. Bolts may extend through the end plate 31 and connect to the housing 10. When the protruding beam 16 is provided on the frame 112 of the container 10, a screw hole may be provided on the protruding beam 16 to connect the end plate connecting portion 42, the end plate 31, and the protruding beam 16 by bolts.

The BMS mounting bracket 50 is connected to the mounting plate connection part 43, and the BMS mounting bracket 50 is adjacent to one side of the battery case 10. And the BMS mounting bracket 50 corresponds to the raised portion 122 of the cover 12. The battery management system 70 is disposed on the BMS mounting bracket 50 and the battery management system 70 extends into the recess formed by the raised portion 122.

The BMS mounting bracket 50 and the mounting plate connection part 43 may be connected by bolts, for example, through holes are provided at the BMS mounting bracket 50, and screw holes are provided at the mounting plate connection part 43, by which the BMS mounting bracket 50 and the mounting plate connection part 43 are connected. Alternatively, a foot may be provided on the BMS mounting bracket 50, and the BMS mounting bracket 50 is connected with the support 40 by the foot. Of course, in practical applications, the BMS mounting bracket 50 and the mounting plate connection part 43 may be connected by welding, riveting, or clipping, and the embodiment of the present disclosure is not particularly limited thereto.

According to the battery pack provided by the embodiment of the disclosure, the protruding portion 122 for accommodating the battery management system is arranged on the box cover 10, the first plug connector 21 and the second plug connector 22 are arranged on the same side of the protruding portion 122, and the plugging direction of the first plug connector 21 is different from that of the second plug connector 22, so that the problem that the stress of the battery pack is too large in the same direction when the first plug connector 21 and the second plug connector 22 are plugged is avoided, the problem that the battery pack is easy to deform is solved, and the connection stability of the battery pack is improved.

The battery pack provided by the embodiment of the disclosure can be applied to an electric vehicle, and the battery pack can be mounted on a frame of the electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (10)

1. A battery pack, comprising:

the battery management system comprises a box body and a battery, wherein the box body comprises a box cover, the box cover comprises a cover main body and a raised part, the raised part is arranged on the top surface of the cover main body, and the raised part is used for accommodating the battery management system;

the first plug connector is arranged on the cover main body;

the second plug connector, the second plug connector is located the lid main part, and first plug connector with the second plug connector is located the homonymy of uplift portion, the plug direction of first plug connector with the plug direction of second plug connector is different.

2. The battery pack of claim 1, wherein the battery pack further comprises:

the plug-in mounting piece is arranged on one side, close to the battery, of the box cover, the plug-in mounting piece is provided with a first mounting surface and a second mounting surface, the first mounting surface is connected with the first plug connector, the second mounting surface is connected with the second plug connector, and an included angle is formed between the first mounting surface and the second mounting surface.

3. The battery pack of claim 2, wherein the first mounting surface and the second mounting surface are vertically disposed.

4. The battery pack according to claim 3, wherein the first mounting surface is parallel to the top surface of the cover main body, and the socket port of the first socket connector faces a side of the first socket connector away from the first mounting surface.

5. The battery pack according to claim 4, wherein the second mounting surface is perpendicular to the top surface of the cover main body, and the socket port of the second socket connector faces a side of the second socket connector away from the raised portion.

6. The battery pack according to claim 3, wherein the cover main body is provided with an insertion projection portion provided at one end of the raised portion, and the insertion mounting member is provided at the insertion projection portion.

7. The battery pack of claim 6, wherein the insert protrusion has a first cover plate disposed parallel to the first mounting surface and a second cover plate disposed parallel to the second mounting surface, the first cover plate having a first piece passing hole formed therein, the first insert passing through the first piece passing hole, the second cover plate having a second piece passing hole formed therein, the second insert passing through the second piece passing hole.

8. The battery pack of claim 2, wherein the battery further comprises:

the BMS installing support is arranged in the box body, and the plug-in mounting piece is arranged on the BMS installing support.

9. The battery pack according to claim 8, wherein the battery pack further comprises:

a plurality of battery modules, the BMS mounting bracket being connected with the battery modules, and the BMS mounting bracket being provided at the top of the battery modules.

10. The battery pack according to claim 8, wherein the battery pack further comprises:

a battery management system disposed on the BMS mounting bracket and at least partially located on the raised portion.

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