CN220492114U - Battery pack - Google Patents

Abstract

The application discloses a battery pack. The battery pack comprises a plurality of single batteries. The battery pack also includes a case assembly having a first direction, the case assembly including a base; the box assembly further comprises a side plate, the side plate is arranged on the periphery of the base in a surrounding mode, and the base and the side plate form a containing cavity for containing the single battery in a surrounding mode. The box subassembly still includes first apron, and first apron is connected with the curb plate, and first apron is located the base in first direction and deviates from one side of holding chamber, and the base includes continuous supporting shoe and bumper beam, and the bumper beam is relative supporting shoe orientation first apron protrusion in first direction, and supporting shoe, bumper beam and first apron cooperate to enclose into first buffer cavity. By the mode, the battery pack has good impact resistance.

Description

Battery pack

Technical Field

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

Background

The battery pack is used as a core component of the new energy automobile, and the safety performance of the battery pack is important for driving safety. Considering that the bottom of the battery pack is easy to be impacted, the impact resistance of the bottom of the battery pack can directly influence the service life of the battery pack, the thermal management safety and other critical parameter indexes. Therefore, there is a need for a battery pack having good impact resistance.

Disclosure of Invention

The application provides a battery pack which has good impact resistance.

The application provides a battery pack. The battery pack comprises a plurality of single batteries. The battery pack also includes a housing assembly having a first orientation. And the case assembly includes a base. The box assembly further comprises a side plate, the side plate is arranged on the periphery of the base in a surrounding mode, and the base and the side plate form a containing cavity for containing the single battery in a surrounding mode. The box assembly further comprises a first cover plate, the first cover plate is connected with the side plate, and the first cover plate is located on one side, away from the accommodating cavity, of the base in the first direction. The base comprises a supporting block and a buffer beam which are connected, the buffer beam protrudes towards the first cover plate relative to the supporting block in the first direction, and the supporting block, the buffer beam and the first cover plate are matched and enclosed to form a first buffer cavity.

In an embodiment of the application, the box subassembly still has the second direction, and second direction and first direction mutually perpendicular, supporting shoe and buffer beam set up to a plurality ofly, and supporting shoe and buffer beam set up along the second direction, are connected with the buffer beam between two adjacent supporting shoes.

In an embodiment of the present application, each buffer Liang Junhe is connected by a first cover plate.

In one embodiment of the present application, a bumper beam includes: a first buffer portion protruding toward the first cover plate with respect to the support block in a first direction; the second buffer part is connected to one side of the first buffer part, which is away from the first cover plate, and the first buffer part and/or the second buffer part are/is connected with the supporting block; the surface of the first buffer part facing the first cover plate comprises a first inclined plane and a second inclined plane, wherein one end, close to the second inclined plane, of the first inclined plane is connected with one end, close to the second inclined plane, of the first inclined plane, the other end, far away from the second inclined plane, of the first inclined plane is connected with one supporting block, the other end, far away from the first inclined plane, of the second inclined plane is connected with the other supporting block, and the first inclined plane faces away from the second inclined plane.

In an embodiment of the present application, a surface of the second buffer portion facing away from the first cover plate includes a third inclined plane and a fourth inclined plane, the third inclined plane is connected with one end of the fourth inclined plane, which is close to each other, the other end of the third inclined plane, which is far away from the fourth inclined plane, is connected with a supporting block, the other end of the fourth inclined plane, which is far away from the third inclined plane, is connected with another supporting block, and the third inclined plane faces away from the fourth inclined plane; the plurality of single batteries are arranged to obtain a first single battery group and a second single battery group; the surface of the supporting block, which is opposite to the first cover plate, comprises a fifth inclined surface and a sixth inclined surface, the fifth inclined surface and the third inclined surface are mutually adjacent, the fifth inclined surface faces the third inclined surface, and the third inclined surface and the fifth inclined surface are respectively used for supporting two adjacent side surfaces of the first single battery pack; the sixth inclined plane and the fourth inclined plane are mutually adjacent, the sixth inclined plane faces the fourth inclined plane, and the fourth inclined plane and the sixth inclined plane are respectively used for supporting two adjacent side faces of the second single battery pack.

In an embodiment of the present application, the box assembly further has a third direction, and the first direction, the second direction, and the third direction are perpendicular to each other; the inside of the buffer beam is provided with a plurality of second buffer cavities, and the second buffer cavities penetrate through the buffer beam along a third direction.

In an embodiment of the present application, the battery pack further includes: the explosion-proof piece is accommodated in the accommodating cavity and is positioned between the first single battery pack and the second single battery pack; the explosion-proof component is provided with an exhaust channel, a first exhaust through hole and a second exhaust through hole, wherein the first exhaust through hole and the second exhaust through hole are communicated with the exhaust channel, the first exhaust through hole faces the first single battery pack, and the second exhaust through hole faces the second single battery pack.

In an embodiment of the present application, the outer surface of the explosion proof member includes a seventh inclined surface and an eighth inclined surface; the first exhaust through hole is communicated to a seventh inclined plane, and the seventh inclined plane is connected with the side surface of the first single battery pack, which is opposite to the fifth inclined plane; the second exhaust through hole is communicated to the eighth inclined plane, and the eighth inclined plane is connected with the side surface, back to the sixth inclined plane, of the second single battery pack.

In an embodiment of the present application, the first unit cell group and the second unit cell group are arranged in multiple groups; the battery pack further includes: the fixed beam is accommodated in the accommodating cavity and is positioned between the first single battery pack and the second single battery pack which are connected with the same supporting block; the surface of the fixed beam facing the first cover plate comprises a ninth inclined plane and a tenth inclined plane, the ninth inclined plane is connected with the side surface of the second single battery pack facing away from the fourth inclined plane, and the tenth inclined plane is connected with the side surface of the first single battery pack facing away from the third inclined plane.

In an embodiment of the present application, the case assembly further has a reference plane parallel to the first direction and the second direction; the support block is also provided with a first heat exchange channel and a second heat exchange channel for passing heat exchange fluid; the first heat exchange channel is arranged close to the fifth inclined plane, and the extending direction of orthographic projection of the first heat exchange channel on the reference plane is parallel to the fifth inclined plane; the second heat exchange channel is arranged close to the sixth inclined plane, and the extending direction of orthographic projection of the second heat exchange channel on the reference plane is parallel to the sixth inclined plane.

The beneficial effects of this application are: unlike the prior art, the present application provides a battery pack. The base of the battery pack comprises a supporting block and a buffer beam which are connected, wherein the buffer beam protrudes towards the first cover plate relative to the supporting block in the first direction, and the supporting block, the buffer beam and the first cover plate are matched and enclosed to form a first buffer cavity. Since the first cover plate is located on the side of the base facing away from the receiving chamber in the first direction, it means that the first cover plate is typically located at the bottom of the battery pack. When external force striking is received to the bottom of battery package, first buffering cavity can provide sufficient space and cushion, therefore the battery package of this application has good resistance striking ability, can ensure the safety of the inside battery cell of battery package.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a battery pack of the present application;

fig. 2 is a schematic view of an exploded structure of the battery pack shown in fig. 1;

FIG. 3 is a schematic top view of the battery pack of FIG. 1;

FIG. 4 is a schematic view showing a sectional structure of the battery pack A-A shown in FIG. 3;

FIGS. 5a-5B are schematic views of the structure of the battery pack B shown in FIG. 4;

FIG. 6 is a schematic view of an embodiment of an explosion proof component of the present application;

fig. 7 is a schematic structural view of an embodiment of a fixed beam of the present application.

Reference numerals illustrate:

10 battery packs; 20 box components; a 21-box main body; 211 a base; 2111 a fifth incline; 2112 a sixth incline; 212 side plates; 213 receiving cavity; 214 support blocks; 22 bumper beams; 221 a first buffer portion; 2211 a first ramp; 2212 a second ramp; 222 a second buffer portion; 2221 third ramp; 2222 fourth ramp; 223 second buffer cavity; 23 a first cover plate; 24 a first buffer cavity; 25 explosion-proof parts; 251 exhaust passage; 252 a first exhaust through hole; 253 a second exhaust through hole; 254 a seventh ramp; 255 eighth ramp; 26 fixing the beam; 261 a ninth ramp; 262 a tenth ramp; 271 a first heat exchange channel; 272 a second heat exchange channel; 273 flow inlet pipe; 274 outlet pipe; a second cover plate 28; 30 single batteries; 31 a first cell stack; 32 a second cell stack; 41 an electrical module; 42 high voltage plug-ins; 43 low voltage plug-in.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, based on the embodiments herein, which are within the scope of the protection of the present application, will be within the skill of the art without inventive effort. Furthermore, it should be understood that the detailed description is presented herein for purposes of illustration and explanation only and is not intended to limit the present application. In this application, unless otherwise indicated, terms of orientation such as "upper", "lower", "left" and "right" are generally used to refer to the directions of the drawings in which the device is actually used or in an operating state.

In the present application, unless explicitly specified and limited otherwise, the terms "connected," "stacked," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

The present application provides a battery pack, which will be described in detail below. It should be noted that the following description order of the embodiments is not intended to limit the preferred order of the embodiments of the present application. In the following embodiments, the descriptions of the embodiments are focused on, and for the part that is not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In order to solve the technical problem that the battery pack in the prior art is poor in impact resistance, an embodiment of the present application provides a battery pack. The battery pack comprises a plurality of single batteries. The battery pack also includes a housing assembly having a first orientation. And the case assembly includes a base. The box assembly further comprises a side plate, the side plate is arranged on the periphery of the base in a surrounding mode, and the base and the side plate form a containing cavity for containing the single battery in a surrounding mode. The box assembly further comprises a first cover plate, the first cover plate is connected with the side plate, and the first cover plate is located on one side, away from the accommodating cavity, of the base in the first direction. The base comprises a supporting block and a buffer beam which are connected, the buffer beam protrudes towards the first cover plate relative to the supporting block in the first direction, and the supporting block, the buffer beam and the first cover plate are matched and enclosed to form a first buffer cavity. As will be described in detail below.

Referring to fig. 1 to 2, fig. 1 is a schematic structural view of an embodiment of a battery pack according to the present application, and fig. 2 is an exploded structural view of the battery pack shown in fig. 1.

In one embodiment, the battery pack 10 is the power source for the powered device. The battery pack 10 includes a unit battery 30, and the unit battery 30 is accommodated in the case assembly 20. The unit cells 30 may be provided in plurality. The unit cell 30 includes, but is not limited to, a lithium ion secondary battery, a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like, to which the embodiment of the present disclosure is not limited. The electric device can be a mobile phone, portable equipment, a notebook computer, a battery car, an electric automobile, a ship, a spacecraft, an electric toy, an electric tool and the like. For example, spacecraft include airplanes, rockets, space planes, spacecraft, and the like; the electric toy includes fixed or mobile electric toys such as a game machine, an electric car toy, an electric ship toy, and an electric airplane toy; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railroad power tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete shakers, electric planers, and the like.

The battery pack 10 further includes an electrical module 41, wherein the electrical module 41 is accommodated in the case assembly 20, and the electrical module 41 is used for controlling the battery cells 30 to be charged and/or discharged. In particular, the electrical module 41 may include a BDU (Battery energy Distribution Unit ) module. Of course, in other embodiments of the present application, the electrical module 41 is not limited to a BDU module, and the electrical module 41 may also be other electronic devices in the battery pack 10, which is not limited herein.

The case assembly 20 of the embodiment of the present application is explained below.

Referring to fig. 3, 4 and 5a-5B, fig. 3 is a schematic top view of the battery pack shown in fig. 1, fig. 4 is a schematic cross-sectional view of the battery pack shown in fig. 3 in A-A direction, and fig. 5a-5B are schematic views of the battery pack B shown in fig. 4.

In one embodiment, the case assembly 20 includes a case body 21, and the case body 21 includes a base 211 and a side plate 212. The side plate 212 is disposed around the outer periphery of the base 211, and the base 211 and the side plate 212 form a containing cavity 213 for containing the single battery 30. The housing assembly 20 also has a first orientation (as indicated by arrow Z in fig. 1 and 5a-5b, and the like). The housing assembly 20 further includes a first cover plate 23. The first cover plate 23 is connected to the side plate 212, and the first cover plate 23 is located at a side of the base 211 facing away from the accommodating chamber 213 in the first direction, meaning that the first cover plate 23 is generally located at the bottom of the battery pack 10.

Further, the tank assembly 20 also includes a second cover 28. The second cover plate 28 is connected to the side plate 212, and the second cover plate 28 is located on a side of the accommodating cavity 213 facing away from the first cover plate 23 in the first direction. The second cover plate 28 is covered on the accommodating cavity 213, so that the accommodating cavity 213 is a relatively closed space, so as to ensure the safety of the single battery 30 in the accommodating cavity 213. And, first apron 23 and second apron 28 can all be realized dismantling with curb plate 212 through fastener such as bolt and be connected, and first apron 23 and second apron 28 easy dismounting can save the time of changing or maintaining battery package 10, improves the operating efficiency, reduces cost of maintenance.

The box main body 21 is also provided with a mounting chamber for mounting the above-described electric module 41. The mounting chamber is located at one side of the receiving chamber 213. The battery pack 10 also includes a high voltage insert 42 and a low voltage insert 43. The high-voltage plug 42 and the low-voltage plug 43 are provided on the outer side surface of the case main body 21, and the high-voltage plug 42 and the low-voltage plug 43 are electrically connected to the electric module 41. The second cover plate 28 is not only arranged in the accommodating cavity 213, but also arranged in the mounting cavity, so that the mounting cavity is a relatively closed space to ensure the safety of the electrical module 41 in the mounting cavity.

In one embodiment, the base 211 includes a support block 214 and a bumper beam 22 connected thereto. The housing assembly 20 also has a second orientation (as indicated by arrow Y in fig. 1 and 5a-5b, and the like), which is perpendicular to the first orientation. The support blocks 214 and the bumper beams 22 are provided in plurality, the support blocks 214 and the bumper beams 22 are provided along the second direction, and the bumper beams 22 are connected between two adjacent support blocks 214. The support block 214 encloses the cushion beam 22 and the side plate 212 into the accommodating chamber 213.

The bumper beam 22 protrudes in the first direction toward the first cover plate 23 with respect to the support block 214, and the support block 214, the bumper beam 22, and the first cover plate 23 are combined to define the first cushion cavity 24. In this way, when the bottom of the battery pack 10 is impacted by external force, that is, the first cover plate 23 is impacted by external force, the first buffer cavity 24 can provide enough space for buffering, so that the battery pack 10 of the embodiment has good impact resistance, and the safety of the single battery 30 inside the battery pack 10 can be ensured.

Further, the case assembly 20 further has a third direction (as indicated by arrow X in fig. 1, the same applies below), and the first direction, the second direction, and the third direction are perpendicular to each other. The inside of the bumper beam 22 has a second bumper cavity 223, and the second bumper cavity 223 penetrates the bumper beam 22 in a third direction. When the first cover plate 23 is impacted by external force, the buffer beam 22 can prop against the first cover plate 23, and the second buffer cavity 223 inside the buffer beam 22 can further buffer the impact force, so that the impact resistance of the battery pack 10 can be further improved.

Optionally, the number of the second buffer cavities 223 is plural, and each second buffer cavity 223 is spaced apart along the first direction and/or the second direction. Fig. 5b exemplarily shows that the second buffer cavities 223 are not only spaced apart in the first direction but also spaced apart in the second direction.

Each bumper beam 22 is connected to a first cover plate 23, specifically, each bumper beam 22 is disposed against the first cover plate 23. In this way, when the first cover plate 23 is impacted by an external force, the buffer beam 22 can timely abut against the first cover plate 23, and the buffer beam 22 can buffer the impact force at the first time, so that the impact resistance of the battery pack 10 can be further improved.

In one embodiment, the bumper beam 22 includes a first bumper portion 221 and a second bumper portion 222. The first buffer portion 221 protrudes toward the first cover plate 23 in the first direction relative to the support block 214, and specifically, the first buffer portion 221, the support block 214, and the first cover plate 23 are combined to form a first buffer cavity 24. The second buffer portion 222 is connected to a side of the first buffer portion 221 facing away from the first cover plate 23. The first buffer 221 and/or the second buffer 222 are connected to the support block 214. Fig. 5b exemplarily shows that the first buffer portion 221 and the second buffer portion 222 are connected to the support block 214, and specifically, the connection positions of the first buffer portion 221 and the second buffer portion 222 are connected to the support block 214.

In an embodiment, the surface of the first buffer portion 221 facing the first cover 23 includes a first inclined surface 2211 and a second inclined surface 2212, wherein the first inclined surface 2211 is connected to one end of the second inclined surface 2212 close to each other, the other end of the first inclined surface 2211 away from the second inclined surface 2212 is connected to one support block 214, the other end of the second inclined surface 2212 away from the first inclined surface 2211 is connected to the other support block 214, and the first inclined surface 2211 faces away from the second inclined surface 2212.

In this way, the first inclined plane 2211 and the second inclined plane 2212, which are adjacent to each other, of the two adjacent buffer beams 22 are matched with the support block 214 and the first cover plate 23 to form the first buffer cavity 24, and the first inclined plane 2211 and the second inclined plane 2212 can ensure that the first buffer cavity 24 has a sufficient volume as far as possible, so as to ensure that the first buffer cavity 24 can provide enough space for buffering, and further ensure that the battery pack 10 has good impact resistance.

In one embodiment, the plurality of unit cells 30 are arranged to obtain the first unit cell group 31 and the second unit cell group 32. The number of the first unit cell groups 31 and the number of the second unit cell groups 32 are multiple groups, and the first unit cell groups 31 and the second unit cell groups 32 are alternately distributed one by one along the second direction. Each of the first unit cell groups 31 and each of the second unit cell groups 32 is composed of a plurality of unit cells 30, and the unit cells 30 of the first unit cell groups 31 are arranged along the third direction, and the unit cells 30 of the second unit cell groups 32 are arranged along the third direction.

The surface of the second buffer portion 222 facing away from the first cover plate 23 includes a third inclined surface 2221 and a fourth inclined surface 2222, wherein the third inclined surface 2221 is connected with one end of the fourth inclined surface 2222, which is close to each other, and the other end of the third inclined surface 2221, which is far away from the fourth inclined surface 2222, is connected with a support block 214, and the other end of the fourth inclined surface 2222, which is far away from the third inclined surface 2221, is connected with another support block 214, and the third inclined surface 2221 faces away from the fourth inclined surface 2222. The surface of the support block 214 facing away from the first cover plate 23 includes a fifth inclined surface 2111 and a sixth inclined surface 2112. The fifth inclined plane 2111 and the third inclined plane 2221 are adjacent to each other, and the fifth inclined plane 2111 faces the third inclined plane 2221, and the third inclined plane 2221 and the fifth inclined plane 2111 are respectively used for supporting two adjacent side surfaces of the first unit battery 31. The sixth inclined surface 2112 and the fourth inclined surface 2222 are adjacent to each other, and the sixth inclined surface 2112 faces the fourth inclined surface 2222, and the fourth inclined surface 2222 and the sixth inclined surface 2112 are respectively for supporting the adjacent two side surfaces of the second unit battery 32. In this embodiment, the third inclined surface 2221 and the fourth inclined surface 2222 on the adaptive buffer beam 22 are configured to the support block 214, the fifth inclined surface 2111 and the sixth inclined surface 2112 are provided, the third inclined surface 2221 and the fifth inclined surface 2111 cooperate to support the single cells 30 of the first single cell group 31, and the fourth inclined surface 2222 and the sixth inclined surface 2112 cooperate to support the single cells 30 of the second single cell group 32. At this time, the unit cells 30 of the first unit cell group 31 and the unit cells 30 of the second unit cell group 32 are in an inclined posture.

Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of an explosion-proof component of the present application.

In one embodiment, the battery pack 10 further includes an explosion-proof member 25, and the explosion-proof member 25 is accommodated in the accommodating cavity 213. The explosion-proof member 25 is located between the first unit cell group 31 and the second unit cell group 32. The inside of the explosion proof member 25 is provided with an exhaust passage 251, and the explosion proof member 25 is further provided with a first exhaust through hole 252 and a second exhaust through hole 253 communicating with the exhaust passage 251. The first exhaust through-hole 252 faces the first unit cell group 31, and the second exhaust through-hole 253 faces the second unit cell group 32.

For the case that the first unit battery group 31 and the second unit battery group 32 are each composed of a plurality of unit batteries 30, the number of the first exhaust through holes 252 is plural, each of the first exhaust through holes 252 is arranged along the third direction, the first exhaust through holes 252 are in one-to-one correspondence with the unit batteries 30 of the first unit battery group 31, the number of the second exhaust through holes 253 is plural, each of the second exhaust through holes 253 is arranged along the third direction, and the second exhaust through holes 253 are in one-to-one correspondence with the unit batteries 30 of the second unit battery group 32. When a thermal runaway problem occurs in a certain unit cell 30, the high-temperature gas discharged from the unit cell 30 is directly discharged into the exhaust channel 251 through the corresponding exhaust through hole, so as to avoid affecting other unit cells 30 as much as possible and avoid a thermal runaway chain reaction. The side of the exhaust channel 251 is also provided with an explosion-proof valve, which can timely exhaust and release pressure when the air pressure of the exhaust channel 251 is greater than a threshold value, so as to ensure the safety of the battery pack 10.

Further, the outer surface of the explosion proof member 25 includes a seventh inclined surface 254 and an eighth inclined surface 255. The first exhaust through hole 252 is connected to the seventh inclined plane 254, the first exhaust through hole 252 is opened on the side wall of the explosion-proof component 25 where the seventh inclined plane 254 is located, and the seventh inclined plane 254 is used for supporting the side surface of the first unit battery 31, which is opposite to the fifth inclined plane 2111; the second exhaust through hole 253 is connected to the eighth inclined plane 255, the second exhaust through hole 253 is formed on a side wall of the explosion-proof component 25 where the eighth inclined plane 255 is located, and the eighth inclined plane 255 is used for supporting a side surface of the second unit battery pack 32 facing away from the sixth inclined plane 2112. In this way, the outer surface of the explosion-proof member 25 can be well engaged with the outer surfaces of the unit cells 30 of the first unit cell group 31 and the second unit cell group 32, which is beneficial to improving the utilization rate of the internal space of the battery pack 10.

Referring to fig. 7, fig. 7 is a schematic structural diagram of an embodiment of a fixing beam of the present application.

In one embodiment, the battery pack 10 further includes a securing beam 26. The fixed beam 26 is accommodated in the accommodating cavity 213, and the fixed beam 26 is located between the first unit cell group 31 and the second unit cell group 32 connected to the same supporting block 214. The fixed beam 26 is located on the side of the support block 214 facing away from the first cover plate 23. The fixing beam 26 plays a role in reinforcing the internal module structure of the battery pack 10 to ensure structural stability of the module structure during use of the battery pack 10.

Further, the surface of the fixed beam 26 facing the first cover plate 23 includes a ninth inclined plane 261 and a tenth inclined plane 262, the ninth inclined plane 261 is used for supporting a side surface of the second unit cell group 32 facing away from the fourth inclined plane 2222, and the tenth inclined plane 262 is used for supporting a side surface of the first unit cell group 31 facing away from the third inclined plane 2221. In this way, the outer surface of the fixing beam 26 can be well engaged with the outer surfaces of the unit cells 30 of the first unit cell group 31 and the second unit cell group 32, which is beneficial to improving the utilization rate of the internal space of the battery pack 10.

In an embodiment, the support block 214 is further provided with a first heat exchange channel 271 and a second heat exchange channel 272 for passing a heat exchange fluid. The first heat exchange channel 271 and the second heat exchange channel 272 pass through the heat exchange fluid to exchange heat with the unit cells 30 on the support block 214. The heat exchange fluid may be a low temperature liquid to cool and dissipate heat from the unit cells 30. The heat exchange fluid may also be a high temperature liquid to heat the cell 30. In the case where the plurality of support blocks 214 are provided, the first heat exchange passage 271 and the second heat exchange passage 272 on each support block 214 communicate with each other. The tank main body 21 is further provided with a flow inlet pipe 273 and a flow outlet pipe 274, the flow inlet pipe 273 and the flow outlet pipe 274 are communicated with the first heat exchange passage 271 and the second heat exchange passage 272, the heat exchange fluid enters the first heat exchange passage 271 and the second heat exchange passage 272 through the flow inlet pipe 273, and then the heat exchange fluid is discharged through the flow outlet pipe 274.

The housing assembly 20 also has a reference plane (shown as plane a in fig. 5b, below) parallel to the first direction and the second direction. The first heat exchanging channel 271 is disposed near the fifth inclined plane 2111, and an extending direction of the orthographic projection of the first heat exchanging channel 271 on the reference plane is parallel to the fifth inclined plane 2111. The second heat exchanging channel 272 is disposed near the sixth inclined plane 2112, and an extending direction of the orthographic projection of the second heat exchanging channel 272 on the reference plane is parallel to the sixth inclined plane 2112. For the situation that the unit battery 30 is in the inclined posture, the first heat exchange channel 271 and the second heat exchange channel 272 are also arranged in an inclined manner, and under the condition that the overflow area of the first heat exchange channel 271 and the overflow area of the second heat exchange channel 272 are fixed, the first heat exchange channel 271 and the second heat exchange channel 272 cover the whole side surface of the unit battery 30 as much as possible, which is beneficial to improving the heat exchange efficiency and reducing the risk of thermal runaway problem of the unit battery 30.

Further, the inflow tube 273 can be provided with an electromagnetic valve, so that the flow of the heat exchange fluid can be regulated according to the temperature inside the battery pack 10, the effect of intelligent control is achieved, and the battery pack 10 can work normally.

In summary, the present application provides a battery pack. The base of the battery pack comprises a supporting block and a buffer beam which are connected, wherein the buffer beam protrudes towards the first cover plate relative to the supporting block in the first direction, and the supporting block, the buffer beam and the first cover plate are matched and enclosed to form a first buffer cavity. Since the first cover plate is located on the side of the base facing away from the receiving chamber in the first direction, it means that the first cover plate is typically located at the bottom of the battery pack. When external force striking is received to the bottom of battery package, first buffering cavity can provide sufficient space and cushion, therefore the battery package of this application has good resistance striking ability, can ensure the safety of the inside battery cell of battery package.

The foregoing has outlined the detailed description of the battery pack provided herein, and the principles and embodiments of the present application have been described herein with the application of specific examples, the above examples being provided only to assist in the understanding of the method of the present application and the core ideas thereof; meanwhile, as those skilled in the art will have modifications in the specific embodiments and application scope in accordance with the ideas of the present application, the present description should not be construed as limiting the present application in view of the above.

Claims (10)

1. A battery pack, comprising:

a plurality of single batteries; and

a housing assembly having a first orientation, and the housing assembly comprising:

a base;

the side plate is arranged around the periphery of the base, and the base and the side plate are arranged to form a containing cavity for containing the single battery; and

the first cover plate is connected with the side plate and is positioned on one side of the base, which is away from the accommodating cavity, in the first direction;

the base comprises a supporting block and a buffer beam which are connected, the buffer beam protrudes towards the first cover plate in the first direction relative to the supporting block, and the supporting block, the buffer beam and the first cover plate are matched and surrounded to form a first buffer cavity.

2. The battery pack of claim 1, wherein the battery pack comprises a plurality of battery cells,

the box assembly is further provided with a second direction, the second direction and the first direction are perpendicular to each other, the supporting blocks and the buffer beams are arranged in a plurality, the supporting blocks and the buffer beams are arranged along the second direction, and the buffer beams are connected between two adjacent supporting blocks.

3. The battery pack of claim 2, wherein the battery pack comprises a plurality of battery cells,

each buffer beam is connected with the first cover plate.

4. The battery pack of claim 2, wherein the battery pack comprises a plurality of battery cells,

the bumper beam includes:

a first buffer portion protruding toward the first cover plate with respect to the support block in the first direction; and

the second buffer part is connected to one side, away from the first cover plate, of the first buffer part, and the first buffer part and/or the second buffer part are/is connected with the supporting block;

the surface of the first buffer part facing the first cover plate comprises a first inclined plane and a second inclined plane, wherein the first inclined plane is connected with one end, close to the second inclined plane, of the second inclined plane, the other end, far away from the second inclined plane, of the first inclined plane is connected with one supporting block, the other end, far away from the first inclined plane, of the second inclined plane is connected with the other supporting block, and the first inclined plane is opposite to the second inclined plane.

5. The battery pack of claim 4, wherein the battery pack comprises a plurality of battery cells,

the surface of the second buffer part, which is away from the first cover plate, comprises a third inclined surface and a fourth inclined surface, wherein one end, close to the fourth inclined surface, of the third inclined surface is connected with one end, close to the fourth inclined surface, of the third inclined surface, the other end, far away from the fourth inclined surface, of the third inclined surface is connected with one supporting block, the other end, far away from the third inclined surface, of the fourth inclined surface is connected with the other supporting block, and the third inclined surface is away from the fourth inclined surface;

the plurality of single batteries are arranged to obtain a first single battery group and a second single battery group; the surface of the supporting block, which is opposite to the first cover plate, comprises a fifth inclined surface and a sixth inclined surface, the fifth inclined surface and the third inclined surface are mutually adjacent, the fifth inclined surface faces the third inclined surface, and the third inclined surface and the fifth inclined surface are respectively used for supporting two adjacent side surfaces of the first single battery pack; the sixth inclined plane and the fourth inclined plane are mutually adjacent, the sixth inclined plane faces the fourth inclined plane, and the fourth inclined plane and the sixth inclined plane are respectively used for supporting two adjacent side faces of the second single battery pack.

6. The battery pack of claim 2, wherein the battery pack comprises a plurality of battery cells,

the box body assembly is further provided with a third direction, and the first direction, the second direction and the third direction are mutually perpendicular; the interior of the bumper beam has a plurality of second bumper cavities extending through the bumper beam in the third direction.

7. The battery pack of claim 5, wherein the battery pack comprises a plurality of battery cells,

the battery pack further includes:

the explosion-proof piece is accommodated in the accommodating cavity and is positioned between the first single battery pack and the second single battery pack;

the explosion-proof device comprises an explosion-proof piece and is characterized in that an exhaust channel, a first exhaust through hole and a second exhaust through hole are arranged in the explosion-proof piece, the first exhaust through hole and the second exhaust through hole are communicated with the exhaust channel, the first exhaust through hole faces the first single battery pack, and the second exhaust through hole faces the second single battery pack.

8. The battery pack of claim 7, wherein the battery pack comprises a plurality of battery cells,

the outer surface of the explosion-proof piece comprises a seventh inclined plane and an eighth inclined plane; the first exhaust through hole is communicated to the seventh inclined plane, and the seventh inclined plane is connected with the side surface of the first single battery pack, which is opposite to the fifth inclined plane; the second exhaust through hole is communicated to the eighth inclined plane, and the eighth inclined plane is connected with the side surface, back to the sixth inclined plane, of the second single battery pack.

9. The battery pack of claim 5, wherein the battery pack comprises a plurality of battery cells,

the first single battery pack and the second single battery pack are arranged into a plurality of groups;

the battery pack further includes:

the fixed beam is accommodated in the accommodating cavity and is positioned between the first single battery pack and the second single battery pack which are connected with the same supporting block;

the surface of the fixed beam facing the first cover plate comprises a ninth inclined plane and a tenth inclined plane, the ninth inclined plane is connected with the side surface of the second single battery pack facing away from the fourth inclined plane, and the tenth inclined plane is connected with the side surface of the first single battery pack facing away from the third inclined plane.

10. The battery pack of claim 5, wherein the battery pack comprises a plurality of battery cells,

the housing assembly also has a reference plane parallel to the first direction and the second direction;

the support block is also provided with a first heat exchange channel and a second heat exchange channel for passing heat exchange fluid; the first heat exchange channel is arranged close to the fifth inclined plane, and the extending direction of orthographic projection of the first heat exchange channel on the reference plane is parallel to the fifth inclined plane; the second heat exchange channel is arranged close to the sixth inclined plane, and the extending direction of orthographic projection of the second heat exchange channel on the reference plane is parallel to the sixth inclined plane.