CN213584058U

CN213584058U - Clamping plate, battery module and battery pack

Info

Publication number: CN213584058U
Application number: CN202022429319.XU
Authority: CN
Inventors: 刘祖勇; 韦银涛; 蒙玉宝; 祝媛; 刘金成
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-10-26
Filing date: 2020-10-26
Publication date: 2021-06-29
Anticipated expiration: 2030-10-26

Abstract

The utility model discloses a splint, battery module and battery package, this splint clamp establish between two adjacent electric cores, and splint include a plurality of bodies and stop part, and a plurality of body intervals set up, are equipped with airflow channel on every body, and the relative both sides difference butt of every body is on two electric cores, and the stop part is connected at the both ends of body, and the stop part can only support at electric core along its length direction's both ends, and the stop part can also only support at electric core along its direction of height's both ends. The clamping plate can better meet the requirement of electric core heat management, and can ensure the extrusion effect of a single electric core, thereby prolonging the service life of the electric core.

Description

Clamping plate, battery module and battery pack

Technical Field

The utility model relates to an energy equipment technical field especially relates to a splint, battery module and battery package.

Background

The battery module is after long-term charge-discharge circulation, and its electric core inside inflation can reduce its life cycle, consequently can pile up at electric core and apply a pretightning force to electric core through the end plate at both ends after in groups, restrain the inflation of electric core. Under the condition of some big multiplying power charges and discharges, electric core calorific capacity is big, needs to dispel the heat to electric core through the forced air cooling, perhaps under the low temperature condition, needs to heat electric core through the warm braw. Consequently, need design clearance between the electric core, dispel the heat or heat as the wind channel to electric core, make the electric core temperature of whole module more even. Because the air duct is added between the electric cores, the structure that the electric cores are fixed by only extruding the two ends of the electric cores is adopted when the electric cores are fixed, so that the extrusion force in the middle of the electric cores is lost. Although the requirement of battery core thermal management is met, the extrusion effect of a single battery core is reduced, and the service life of the battery core cannot be prolonged to the maximum extent.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a splint, this splint can reach the heat dissipation demand of the electric core of better satisfying the battery module, can ensure the extrusion effect to single electric core again to promote electric core life-span.

A second object of the utility model is to provide a battery module, this battery module can satisfy the requirement of electric core heat management betterly, can ensure the extrusion effect to single electric core again to promote electric core life-span.

A third object of the present invention is to provide a battery pack, which has better temperature control performance and longer service life.

For realizing the above technical effect, the technical scheme of the utility model as follows:

the utility model discloses a splint, splint clamp establish between two adjacent electric cores of battery module, splint include a plurality of bodies and stop part, and are a plurality of the body interval sets up, every be equipped with airflow channel on the body, every the relative both sides of body butt respectively is two on the electric core, the stop part is connected the both ends of body, the stop part can only be supported electric core is along its length direction's both ends, the stop part can also only be supported electric core is along its direction of height's both ends.

In some embodiments, the body is provided with an elastic layer abutting against the side wall of the battery cell.

In some embodiments, the stopper includes two baffles, the two baffles are respectively connected to two ends of the plurality of bodies, each baffle includes a first baffle plate and a second baffle plate, the first baffle plate abuts against one end of the battery cell in the length direction of the battery cell, and the second baffle plate abuts against one end of the battery cell in the length direction of the battery cell and one end of the battery cell in the height direction of the battery cell.

In some specific embodiments, the body has a first sidewall and a second sidewall, and the first sidewall and the second sidewall respectively stop against two of the battery cells; the first blocking plate comprises a plurality of vertical parts distributed along the height direction of the battery cell, two ends of each vertical part are respectively connected with the two bodies, one vertical part is connected to the first side wall, and the other vertical part is connected to the second side wall.

In some more specific embodiments, the second blocking plate includes two L-shaped plates, the two L-shaped plates are respectively connected to the first side wall and the second side wall, the horizontal plate of the L-shaped plate is connected to the body and abuts against one end of the battery cell in the height direction thereof, and the vertical plate of the L-shaped plate is connected to the uppermost vertical portion and abuts against one end of the battery cell in the length direction thereof.

In some embodiments, the airflow channels extend along the height direction of the battery cell, and each of the bodies is provided with a plurality of airflow channels distributed at intervals along the length direction of the body.

The utility model also discloses a battery module, include: the battery comprises a plurality of battery cells, wherein the plurality of battery cells are arranged at intervals; the clamping plates are multiple, and each clamping plate is clamped between two adjacent electric cores; the bandage, the bandage encircles the electricity core sets up, the bandage is used for the ligature a plurality of electricity core and a plurality of splint.

In some embodiments, the stop member is provided with a limit protrusion, and the binding band is stopped on the limit protrusion.

The utility model also discloses a battery package, include: the air conditioner comprises a shell, wherein an air inlet and an air outlet are formed in the shell; the battery modules are arranged in the casing, and the battery modules are distributed along the length direction of the casing at intervals; the fan is arranged at the air outlet.

In some embodiments, the air inlet includes a first air hole, the first air hole is disposed on the bottom wall of the housing and is disposed corresponding to the air flow channel, and/or: the second air holes are formed in two side walls, opposite to each other, of the shell, and each second air hole corresponds to a gap between two adjacent battery modules; and/or: and the third air hole and the air outlet are formed in the side walls of the other two opposite sets of the shell, and the third air hole corresponds to a gap between every two adjacent battery cells in each battery module.

The utility model discloses splint is owing to be equipped with airflow channel on the body of splint for hot gas flow or cold air current can be through airflow channel and electric core fully contact, have realized cooling or heating to the electricity betterly. Because the both sides of the relative setting of splint end respectively on two electric cores, adopt the bandage with a plurality of electric cores and a plurality of splint ligature completion after, every electric core all can receive rather than the extrusion of the splint that end to increase the circulation life of electric core. Because the stop part has restricted the motion of electric core from height and length two directions, avoided the not hard up phenomenon of electric core or drunkenness to take place, promoted the stability and the reliability of battery module.

The utility model discloses battery module owing to have the foretell splint, can satisfy the requirement of electric core heat management betterly, can ensure the extrusion effect to single electric core again to promote electric core life-span.

The utility model discloses battery package owing to have the foregoing battery package, promoted the temperature control performance of battery package, prolonged the life of battery package.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic structural view of a clamping plate of a battery module according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a battery pack according to an embodiment of the present invention.

Fig. 4 is a schematic structural view of the battery pack according to another direction of the embodiment of the present invention.

Reference numerals:

11. a body; 111. an air flow channel; 112. a first side wall; 113. a second side wall; 12. a stopper; 121. A first barrier plate; 1211. a vertical portion; 122. a second barrier plate; 1221. a vertical plate; 1222. a horizontal plate; 13. a limiting protrusion; 2. an electric core; 3. binding bands; 4. an end plate; 100. a housing; 110. a first air vent; 120. a second air hole; 130. a third air hole; 140. an air outlet; 200. a fan.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two elements can be directly connected or indirectly connected through an intermediate medium, and the two elements can be communicated with each other. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The specific structure of the splint according to the embodiment of the present invention will be described with reference to fig. 1.

As shown in fig. 1-2, the utility model discloses a splint, splint clamp are established between two adjacent electric cores 2, splint include a plurality of bodies 11 and stop part 12, a plurality of bodies 11 intervals set up, be equipped with airflow channel 111 on every body 11, the relative both sides difference butt of every body 11 is on two electric cores 2, stop part 12 is connected at the both ends of body 11, stop part 12 can end at electric core 2 along its length direction's both ends, stop part 12 can also end at electric core 2 along its direction of height's both ends.

It can be understood that, in the actual assembly, because the body 11 of the clamping plate is provided with the airflow channel 111, no matter when the electric core 2 is cooled by introducing cold air or heated by introducing warm air, the airflow can fully contact with the electric core 2 through the airflow channel 111, thereby better cooling or heating the electric core 2. Meanwhile, because the both sides of the relative setting of splint all end to electric core 2, adopt bandage 3 to accomplish the back with a plurality of electric cores 2 and a plurality of splint ligatures, every electric core 2 all can receive rather than the extrusion of the splint that end to increase electric core 2's cycle life. Further, the stoppers 12 can be stopped at both ends in the length direction of the battery cell 2 and both ends in the height direction of the battery cell 2. Therefore, the stop piece 12 limits the movement of the battery cell 2 along the length direction and the height direction of the battery cell, and the stability of the whole battery module is ensured.

The utility model discloses splint is owing to be equipped with airflow channel 111 on the body 11 of splint for hot gas flow or cold air current can be through airflow channel 111 and electric core 2 abundant contact, have realized cooling or heating to the electricity betterly. Because the both sides of the relative setting of splint end respectively on two electric cores 2, adopt bandage 3 to accomplish the back with a plurality of electric cores 2 and a plurality of splint ligatures, every electric core 2 all can receive rather than the extrusion of the splint that end to increase electric core 2's cycle life. Because the stop part 12 limits the movement of the electric core 2 from the height direction and the length direction, the phenomenon that the electric core 2 is loosened or moved is avoided, and the stability and the reliability of the battery module are improved.

In some embodiments, as shown in fig. 2, the body 11 is provided with an elastic layer abutting against the side wall of the battery cell 2. From this, the elastic layer can be used for tolerance compensation and can play the cushioning effect, avoids electric core 2 to appear the bruise, and the elastic layer can also make the extrusion that electric core 2 received more even to further promote electric core 2's cycle life.

In some embodiments, as shown in fig. 2, the stopper 12 includes two baffles, the two baffles are respectively connected to two ends of the plurality of bodies 11, each baffle includes a first baffle 121 and a second baffle 122, the first baffle 121 abuts against one end of the battery cell 2 along the length direction thereof, and the second baffle 122 abuts against one end of the battery cell 2 along the length direction thereof and one end of the battery cell 2 along the height direction thereof. It can be understood that, through the backstop effect of first barrier plate 121 and second barrier plate 122, guaranteed the fixed action of splint to electric core 2, promoted the stability of being connected of 3 back splint of ligature bandage and electric core 2 on the one hand, on the other hand has avoided the phenomenon emergence of the whole battery module deformation that electric core 2 drunkenness leads to in the transportation.

In some specific embodiments, as shown in fig. 2, the body 11 has a first sidewall 112 and a second sidewall 113, and the first sidewall 112 and the second sidewall 113 respectively abut against the two battery cells 2. The first barrier plate 121 includes a plurality of vertical portions 1211 distributed along the height direction of the battery cell 2, both ends of each vertical portion 1211 are respectively connected to the two bodies 11, and one vertical portion 1211 of the two adjacent vertical portions 1211 is connected to the first side wall 112, and the other vertical portion 1211 is connected to the second side wall 113. It is understood that, after the installation is completed, one upright portion 1211 abuts against one cell 2 and the other upright portion 1211 abuts against the other cell 2 in the two adjacent upright portions 1211. Because the first blocking plates 121 are two first blocking plates connected to two ends of the body 11, the technical scheme that the vertical portions 1211 on the same first blocking plate 121 are alternatively stopped is adopted, so that the contact area between two ends of each battery cell 2 in the length direction of the battery cell and the two first blocking plates 121 can be increased to the maximum limit degree, and the stability of the battery cell 2 is ensured.

In some more specific embodiments, as shown in fig. 2, the second blocking plate 122 includes two L-shaped plates, which are respectively connected to the first side wall 112 and the second side wall 113, a horizontal plate 1222 of the L-shaped plate is connected to the body 11 and abuts against one end of the battery cell 2 in the height direction thereof, and a vertical plate 1221 of the L-shaped plate is connected to the uppermost vertical portion 1211 and abuts against one end of the battery cell 2 in the length direction thereof. It can be understood that, because the second blocking plate 122 is an L-shaped plate, that is to say, the second blocking plate 122 is fitted at the corner of the battery cell 2, the battery cell 2 can be defined from two directions by the structure fitted at the corner of the battery cell 2, so as to improve the stability of the battery cell 2, and better avoid the occurrence of the phenomenon that the battery cell 2 shakes.

In some embodiments, the airflow channels 111 extend along the height direction of the battery cell 2, and a plurality of airflow channels 111 are disposed on each body 11 and spaced along the length direction thereof. It can be understood that the airflow channels 111 are distributed on the body 11 at intervals, so that the strength of the body 11 is ensured on the premise of ensuring smooth airflow, and the phenomenon that the body 11 is damaged due to expansion of the battery cell 2 is avoided.

Example (b):

a splint according to an embodiment of the present invention will be described with reference to fig. 1.

As shown in fig. 1, the clamping plate includes three bodies 11 and three stoppers 12, the three bodies 11 are arranged at intervals, each body 11 has a first side wall 112 and a second side wall 113, and the first side wall 112 and the second side wall 113 respectively abut on two battery cells 2. The stopper 12 comprises two baffles, each connected to one end of three bodies 11. The baffle includes a first blocking plate 121 and a second blocking plate 122 connected. The first barrier plate 121 includes two vertical portions 1211 distributed along the height direction of the battery cell 2, two ends of each vertical portion 1211 are respectively connected to the two bodies 11, one of the vertical portions 1211 is connected to the first side wall 112, and the other vertical portion 1211 is connected to the second side wall 113. The two vertical portions 1211 of the first blocking plate 121 located at the same height are respectively connected to the first sidewall 112 and the second sidewall 113. Specifically, the lower vertical portion 1211 of one first barrier plate 121 is connected to the first sidewall 112, the upper vertical portion 1211 is connected to the second sidewall 113, the lower vertical portion 1211 of the other first barrier plate 121 is connected to the second sidewall 113, and the upper vertical portion 1211 is connected to the first sidewall 112. The second blocking plate 122 includes two L-shaped plates, which are respectively connected to the first side wall 112 and the second side wall 113, a horizontal plate 1222 of the L-shaped plate is connected to the body 11 and abuts against one end of the cell 2 in the height direction thereof, and a vertical plate 1221 of the L-shaped plate is connected to the uppermost vertical portion 1211 and abuts against one end of the cell 2 in the length direction thereof.

A battery module according to an embodiment of the present invention will be described with reference to fig. 2.

As shown in fig. 2, the battery module according to the embodiment of the present invention includes a plurality of battery cells 2, a clamping plate and a binding band 3, where the plurality of battery cells 2 are arranged at intervals; splint are a plurality of, and every splint clamp is established between two adjacent electric core 2, and bandage 3 encircles electric core 2 and sets up, and bandage 3 is used for a plurality of electric core 2 of ligature and a plurality of splint.

The utility model discloses battery module owing to have the foretell splint, can satisfy the requirement of the thermal management of electric core 2 betterly, can ensure the extrusion effect to single electric core 2 again to promote the life-span of electric core 2.

In some embodiments, as shown in fig. 2, the stop member 12 is provided with a limit projection 13, and the strap 3 is stopped on the limit projection 13. It can be understood that the limit of the stop part 12 can be realized by the abutting of the limit protrusion 13 and the binding band 3, and the movement of the stop part along the height direction of the battery cell 2 is avoided, so that the phenomenon that the clamp plate slides out of the battery module due to the vibration and the uneven expansion inside the battery cell 2 is avoided.

It should be noted here that the number and number of the limit protrusions 13 may be selected according to actual needs, and the parameters of the limit protrusions 13 are not limited herein.

Example (b):

a battery module according to an embodiment of the present invention will be described with reference to fig. 1 to 2.

As shown in fig. 1 to 2, the battery module includes a cell 2, a clamping plate, a binding band 3, and an end plate 4. The number of electric core 2 is eight, and 2 intervals of eight electric cores set up, and the number of splint is fourteen, is equipped with two splint along the direction of height interval distribution of electric core 2 between two adjacent electric cores 2, and the number of end plate 4 is two, and two end plates 4 are located the outside of eight electric cores 2, and the number of bandage 3 is two, and two bandage 3 all are used for ligature electric core 2, splint and end plate 4 along the direction of height interval distribution of electric core 2, every bandage 3. The construction of the splint has been described in detail above.

The specific structure of the battery pack according to the embodiment of the present invention is described below with reference to fig. 3 to 4.

As shown in fig. 3-4, the utility model also discloses a battery pack, this battery pack includes casing 100, battery module and fan 200, is equipped with air intake and air outlet 140 on the casing 100, and the battery module is a plurality of, and a plurality of battery modules are along the length direction interval distribution of casing 100, and fan 200 establishes in air outlet 140 department.

In some embodiments, the air inlet includes a first air hole 110, and the first air hole 110 is disposed on the bottom wall of the casing 100 and corresponds to the air flow channel 111. It is understood that the first air holes 110 are disposed corresponding to the air flow channel 111 to increase the contact area of the air flow with the battery cell 2, so as to increase the heating or cooling effect of the battery cell 2.

Preferably, the lengths of the plurality of first wind holes 110 in the length direction of the case 100 are different, and the length of the first wind hole 110 closer to the fan 200 is smaller. It can be understood that, in the actual heat dissipation process, the heat dissipation or heating effect of the battery cells 2 close to the blower 200 is better, so that the phenomenon of local supercooling or local overheating of the plurality of battery cells 2 may occur. In this embodiment, the length of the first air hole 110 close to the fan 200 is smaller, and the length of the first air hole 110 far from the fan 200 is larger, so that the heat dissipation or heating effect of the plurality of battery cells 2 is better, and the phenomenon of local overheating or local supercooling in the casing 100 is avoided.

In some embodiments, the air inlet further includes second air holes 120, the second air holes 120 are disposed on two opposite sidewalls of the housing 100, and each second air hole 120 is disposed corresponding to a gap between two adjacent battery modules. It can be understood that the second air hole 120 is arranged corresponding to the gap between two adjacent battery modules, and can improve the uniformity of heating or heat dissipation of the air flow to the plurality of battery modules, so that the temperature inside the whole battery pack is ensured to be uniform, and the phenomenon of local overheating or supercooling inside the battery pack is avoided.

In some embodiments, the air inlet further includes a third air hole 130, the third air hole 130 and the air outlet 140 are disposed on two other opposite sidewalls of the casing 100, and the third air hole 130 is disposed corresponding to a gap between two adjacent battery cells 2 in each battery module. It can be understood that, the third air hole 130 corresponds to the gap setting between two adjacent electric cores 2, can promote the heating or radiating homogeneity of air current to a plurality of electric cores 2 in the same battery module to guarantee the inside temperature homogeneity of whole battery package, avoid the inside local overheat of battery package or the phenomenon of subcooling to take place.

Example (b):

the battery pack according to the embodiment of the present invention is described below with reference to fig. 3 to 4.

As shown in fig. 3-4, the battery pack includes a housing 100, four battery modules and a blower 200, the housing 100 is provided with an air inlet and an air outlet 140, the four battery modules are distributed at intervals along the length direction of the housing 100, and the blower 200 is disposed at the air outlet 140. The air outlets 140 are disposed on the rear side wall of the casing 100, and are two in interval distribution, and each air outlet 140 is provided with a motor. The air inlet includes a first air hole 110, a second air hole 120, and a third air hole 130. The first air holes 110 are formed in the bottom wall of the housing 100, the first air holes 110 are arranged in seven rows and four rows, and each first air hole 110 corresponds to one air flow channel 111 of one battery module. The number of the second air holes 120 is six, three second air holes 120 are respectively arranged on the left side wall and the right side wall of the casing 100, and each second air hole 120 corresponds to the gap between two adjacent battery modules. The third air holes 130 are formed in the front side wall of the casing 100, and are seven at intervals, and each second air hole 120 is disposed corresponding to a gap between two adjacent battery cells 2.

In the description herein, references to the description of "some embodiments," "other embodiments," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, and for those skilled in the art, there are variations on the detailed description and the application scope according to the idea of the present invention, and the content of the description should not be construed as a limitation to the present invention.

Claims

1. The utility model provides a splint, its characterized in that, splint press from both sides and establish between two adjacent electric cores (2) of battery module, splint include a plurality of bodies (11) and stop part (12), and are a plurality of body (11) interval sets up, every be equipped with airflow channel (111) on body (11), every the relative both sides of body (11) butt respectively on two electric core (2), stop part (12) are connected the both ends of body (11), stop part (12) can end electric core (2) along its length direction's both ends, stop part (12) can also end electric core (2) along its direction of height's both ends.

2. The clamp of claim 1, characterized in that the body (11) rests on the side walls of the cells (2) with an elastic layer.

3. The clamping plate according to claim 1, characterized in that the stop member (12) comprises two baffle plates, the two baffle plates are respectively connected to two ends of the plurality of bodies (11), each baffle plate comprises a first baffle plate (121) and a second baffle plate (122) which are connected, the first baffle plate (121) is abutted against one end of the battery cell (2) along the length direction of the battery cell, and the second baffle plate (122) is abutted against one end of the battery cell (2) along the length direction of the battery cell and one end of the battery cell (2) along the height direction of the battery cell.

4. A splint according to claim 3, characterized in that said body (11) has a first side wall (112) and a second side wall (113), said first side wall (112) and said second side wall (113) respectively resting on two of said cells (2);

the first barrier plate (121) comprises a plurality of vertical parts (1211) distributed along the height direction of the battery cell (2), two ends of each vertical part (1211) are respectively connected with two bodies (11), and one vertical part (1211) of the two adjacent vertical parts (1211) is connected to the first side wall (112) and the other vertical part is connected to the second side wall (113).

5. The clamping plate according to claim 4, characterized in that the second blocking plate (122) comprises two L-shaped plates, which are respectively connected to the first side wall (112) and the second side wall (113), the horizontal plate (1222) of which is connected to the body (11) and rests against one end of the cell (2) in the height direction thereof, and the vertical plate (1221) of which is connected to the uppermost vertical portion (1211) and rests against one end of the cell (2) in the length direction thereof.

6. The clamping plate according to claim 1, characterized in that the airflow channel (111) extends along the height direction of the battery core (2), and each body (11) is provided with a plurality of airflow channels (111) distributed at intervals along the length direction thereof.

7. A battery module, comprising:

the battery cell comprises a plurality of battery cells (2), wherein the plurality of battery cells (2) are arranged at intervals;

the clamping plate according to any one of claims 1 to 6, which is a plurality of clamping plates, each clamping plate being clamped between two adjacent electric cores (2);

bandage (3), bandage (3) encircle electric core (2) set up, bandage (3) are used for the ligature a plurality of electric core (2) and a plurality of splint.

8. The battery module according to claim 7, wherein the stopper (12) is provided with a stopper protrusion (13), and the strap (3) is stopped against the stopper protrusion (13).

9. A battery pack, comprising:

the air conditioner comprises a shell (100), wherein an air inlet and an air outlet (140) are formed in the shell (100);

the battery module according to claim 7 or 8, wherein the battery module is plural, and the plural battery modules are distributed at intervals along the length direction of the housing (100);

the fan (200) is arranged at the air outlet (140).

10. The battery pack of claim 9, wherein the air inlet comprises:

the first air hole (110), the first air hole (110) is arranged on the bottom wall of the shell (100), and is arranged corresponding to the air flow channel (111); and/or:

the second air holes (120) are formed in two side walls, opposite to each other, of the shell (100), and each second air hole (120) is arranged corresponding to a gap between two adjacent battery modules; and/or:

and the third air hole (130) and the air outlet (140) are formed in the other two oppositely-arranged side walls of the shell (100), and the third air hole (130) is arranged corresponding to a gap between every two adjacent electric cores (2) in each battery module.