CN217182255U

CN217182255U - Battery pack and electric automobile

Info

Publication number: CN217182255U
Application number: CN202122268137.3U
Authority: CN
Inventors: 张建平; 黄春华
Original assignee: Aulton New Energy Automotive Technology Co Ltd
Current assignee: Aulton New Energy Automotive Technology Co Ltd
Priority date: 2020-09-17
Filing date: 2021-09-17
Publication date: 2022-08-12
Anticipated expiration: 2031-09-17
Also published as: CN114194017A; CN114204154A; CN114274754A; CN114204157A; CN114204155A; CN217347468U; CN217124533U; CN114204335A; CN216563298U; CN217848074U; CN216443457U; CN114194016A; CN114204175A; CN216563401U; CN217848141U; CN114204156A; CN114204201A; CN217124591U; CN114204334A; CN114204324A

Abstract

The utility model discloses a battery package and electric automobile for the confession liquid device with the coolant liquid that provides links to each other, include: the mounting seat is arranged on the battery pack; and the connecting valve is fixed on the mounting seat, one end of the connecting valve, which is positioned at the inner side of the battery pack, is connected with the liquid cooling pipeline, the other end of the connecting valve is used for being connected with the liquid supply device, an openable and closable circulation channel is formed inside the connecting valve, and the circulation direction of the circulation channel is parallel to the plane direction of the battery pack, so that the battery pack is horizontally mounted on the electric automobile and then is communicated with the liquid cooling pipeline of the electric automobile. According to the scheme, the battery pack is installed at the bottom of the electric automobile, when the battery pack is horizontally moved in place, the liquid cooling connecting device of the battery pack and the liquid cooling pipeline of the electric automobile can be hermetically communicated when the battery pack is installed, the sealing performance is ensured, liquid leakage is prevented, and the installation and connection process is simple and efficient.

Description

Battery pack and electric automobile

This application claims priority from chinese patent application 202010981928.8 filed as 2020/09/17. This application refers to the above-mentioned patent application in its entirety.

Technical Field

The utility model relates to an electric automobile trades the electric field, especially relates to a level dock battery end liquid cooling connecting device, battery package and electric automobile.

Background

At present, two modes of charging and battery replacement are mainly used for acquiring energy of the electric automobile. Due to the battery replacement mode, the electric energy can be rapidly supplied, the waiting time of customers is reduced, and the utilization rate of the battery replacement station is improved. In addition, the battery can be charged in a centralized manner at night, and peak shaving energy storage of the power load is realized. Meanwhile, the comprehensive utilization efficiency of the power equipment is improved, the service life of the battery is prolonged, and the method has high popularization value and economic significance.

In the battery replacement type electric vehicle, the replaceable battery pack is generally movably mounted, and the battery pack can be taken down at any time and replaced by a new battery pack. The cooling pipe arranged on the quick-change battery pack is connected with a cooling system on the electric automobile, and the circulation of cooling liquid is utilized, so that the heat balance of the quick-change battery pack is realized. However, in the current quick-change battery pack and the plug connector structure on the quick-change bracket assembly, the liquid tightness is not perfect due to the limitation of locking and positioning of the locking mechanism of the battery pack, and a problem of dripping may occur, which may cause potential safety hazards such as electric leakage. This results in a significant limitation on how the design of the liquid-cooled connectors on the replaceable battery pack can be made.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is in order to overcome above-mentioned problem, a level dock battery end liquid cooling connecting device, battery package and electric automobile are provided.

The utility model discloses a solve above-mentioned technical problem through following technical scheme:

the utility model discloses a horizontal dock battery end liquid cooling connecting device for the confession liquid device of the coolant liquid that provides links to each other, thereby will the coolant liquid lets in the liquid cooling pipeline in the battery package, include:

the mounting seat is arranged on the battery pack; and

the connecting valve is fixed in on the mount pad, the connecting valve is located the inboard one end of battery package with the liquid cooling pipeline is connected, the other end be used for with supply liquid device is connected, the inside openable circulation passageway that is formed with of connecting valve, and the circulation direction of circulation passageway with the plane direction of battery package parallels to realize the intercommunication with electric automobile liquid cooling pipeline behind battery package with the horizontal direction installation to electric automobile.

According to the scheme, the battery pack is installed at the bottom of the electric automobile in the process, when the battery pack horizontally moves in place, the liquid cooling connecting device of the battery pack and the liquid cooling pipeline of the electric automobile can be communicated in a sealing mode when the battery pack is installed, the sealing performance is ensured, the liquid leakage is prevented, and the installation and connection process is simple and efficient.

Preferably, the mounting seat is provided on a top surface or a side surface of the battery pack, and a plane direction of the mounting seat is perpendicular to a plane direction of the battery pack and to the flow direction.

According to the scheme, the installation seat is fixed relative to the battery pack in a vertical mode, the flowing direction of the flowing channel of the connecting valve is perpendicular to the installation seat, namely the flowing direction of the flowing channel of the connecting valve is parallel to the horizontal direction of the battery pack, and therefore the liquid cooling connecting device and the liquid cooling pipeline of the electric automobile can be quickly and hermetically communicated when the battery pack is lifted in place.

Preferably, the battery pack is detachably connected to the bottom of the electric vehicle through a locking device, and when the battery pack lifted to the place from the bottom of the electric vehicle moves along the length direction of the vehicle body of the electric vehicle to a locking shaft on the battery pack and is matched with a locking groove of the locking device, a liquid supply device of the electric vehicle is communicated with the connecting valve and opens the flow channel.

According to the scheme, when the battery pack is horizontally moved to the locking shafts on the two sides of the battery pack and the locking grooves of the locking device are matched, namely the locking shafts of the battery pack are locked in the corresponding locking grooves, the liquid cooling pipeline of the electric automobile is gradually abutted to the sealing connection from the contact state with the connecting valve of the battery pack, and the circulation channel is opened.

Preferably, a positioning part is arranged on the mounting seat, and the liquid supply device and the connecting valve are positioned through the positioning part.

According to the scheme, the liquid supply device and the connecting valve are accurately and quickly butted through the positioning part.

Preferably, the positioning component comprises two positioning holes or two positioning columns which are respectively arranged at two sides of the connecting valve.

Preferably, a sealing ring arranged around the connecting valve is arranged on the mounting seat.

According to this scheme, through set up the sealing washer in the connecting valve periphery, guarantee to supply the liquid cooling connecting device between liquid supply device and the battery package further sealing connection, even if take place slight weeping phenomenon also can guarantee that liquid can not spill and cause the influence to other components and parts.

Preferably, the connection valve includes a housing in which the flow passage is formed, and a valve body that is provided in the flow passage so as to be movable in a telescopic manner to open and close the flow passage.

According to the scheme, when the liquid supply device is in sealing connection with the connecting valve, the flow channel can be quickly opened by moving the position of the valve core in the shell, the opening and the sealing connection of the flow channel are synchronously realized, and the liquid leakage phenomenon is avoided.

Preferably, the housing has a first end and a second end arranged along the circulation direction, the first end is an open structure and the second end is provided with a plurality of through holes, and the circulation channel is formed between the open structure and the plurality of through holes.

Preferably, the valve core comprises a core body extending from the first end part to the second end part and a valve plug sleeved at one end corresponding to the first end part of the core body and used for sealing the core body and the shell, and the flow passage is opened or closed through the telescopic movement of the valve plug.

According to the scheme, the position of the core body is kept unchanged in the shell body of the connecting valve, the valve plug sealed between the end face of the core body and the shell body moves axially along the core body to open or close the flow passage between the shell body and the core body, and the opening and closing of the flow passage and the sealing connection are guaranteed to be simultaneously combined.

Preferably, the end surface of the core is recessed at a predetermined depth of the first end, and a guide structure is provided in a region of the housing higher than the end surface of the core.

According to the scheme, when the positioning part outside the connecting valve realizes positioning, the connector of the liquid supply device can be more accurately butted with the connecting valve through the guide structure at the front end of the core body, and the sealing connection efficiency is improved.

Preferably, one end of the valve core is fixedly connected with the second end portion, the other end of the valve core is telescopically and movably connected with the second end portion in the flow channel, and the valve core is hermetically connected with the first end portion.

According to the scheme, in the connecting valve shell, the valve core which is connected between one end and the shell in a sealing mode is arranged to move in a telescopic mode relative to the shell to open or close the circulation channel, and the opening and closing of the circulation channel and the sealing connection are guaranteed to be achieved simultaneously.

The utility model also discloses a battery package, including above-mentioned arbitrary scheme horizontal dock battery end liquid cooling connecting device.

Preferably, the number of the horizontal butt joint type battery end liquid-cooling connecting devices is two, wherein one of the horizontal butt joint type battery end liquid-cooling connecting devices is used as an input part of cooling liquid, and the other horizontal butt joint type battery end liquid-cooling connecting device is used as an output part of the cooling liquid.

Preferably, the two horizontal butt-joint type battery end liquid-cooling connecting devices are respectively arranged at two opposite ends of the battery pack.

According to the scheme, the input part and the output part of the liquid cooling connecting device are arranged at the two ends of the battery pack, so that the layout of liquid cooling pipelines in the battery pack can be optimized, the occupied space of the liquid cooling pipelines is reduced, and the heat exchange efficiency is improved.

The utility model also discloses a battery package, including above-mentioned arbitrary scheme battery package.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: the utility model ensures that the battery pack and the electric vehicle end connector are not easily affected by the external environment when being electrically connected by installing the battery end electric connector and the vehicle end electric connector between the battery pack and the battery accommodating cavity of the electric vehicle, thereby ensuring that the battery pack can stably provide power for the electric vehicle; in addition, the battery pack is more stable to install due to the matching of the hanging piece, and the temperature of the battery pack is better controlled due to the matching of the liquid cooling connecting device.

Drawings

Fig. 1 is a schematic structural view of a liquid-cooled connection assembly according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a first liquid-cooled connecting device according to embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a second liquid-cooled connecting device according to embodiment 1 of the present invention;

fig. 4 is a schematic view of an installation manner of the horizontal butt-joint type battery end liquid-cooling connection device according to the present invention, which is installed on a battery pack in embodiment 2;

fig. 5 is a schematic structural view of a liquid-cooled connection assembly connected to a battery pack according to the present invention in embodiment 2.

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 1 to 3, in this embodiment 1, a liquid-cooled connection assembly 5000 is disclosed, the liquid-cooled connection assembly 5000 is used between a liquid supply device and a liquid-cooled pipeline, and the liquid-cooled connection assembly 5000 is used to achieve communication between the liquid supply device and the liquid-cooled pipeline, so that a cooling liquid in the liquid supply device circulates into the liquid-cooled pipeline and flows back into the liquid supply device, thereby achieving heat exchange in an area where the liquid-cooled pipeline is disposed.

Specifically, the liquid cooling connection assembly 5000 includes a first liquid cooling connection device 5100 and a second liquid cooling connection device 5200, the first liquid cooling connection device 5100 and the second liquid cooling connection device 5200 are used in a matched manner, one of them is provided as a connection joint of the liquid supply device, and the other is provided as a connection joint of the liquid cooling pipeline, and the liquid cooling connection assembly 5000 realizes the conduction of the liquid cooling pipeline while realizing the sealing connection, thereby allowing the cooling liquid to circulate.

As shown in fig. 1 and 2, the first liquid-cooled connection 5100 includes a first mount 5110 and a first connection valve 5120.

As shown in fig. 1 and 3, the second liquid-cooled connecting device 5200 includes a second mounting seat 5210 and a second connecting valve 5220.

The first mounting seat 5110 is a planar plate-shaped structure, specifically, a rectangular shape, and is used for mounting and fixing the first connection valve 5120.

The first connection valve 5120 is fixed to the first mounting seat 5110, and a flow passage is formed in the first connection valve 5120 to be opened and closed, and the flow direction of the flow passage is perpendicular to the plane direction of the first mounting seat 5110.

The second mounting seat 5210 is a planar plate-shaped structure, specifically, a rectangular shape, and is used for mounting and fixing the second connection valve 5220.

The second connection valve 5220 is fixed to the second mounting seat 5210, and an openable and closable flow passage is formed in the second connection valve 5220, and the flow direction of the flow passage is perpendicular to the planar direction of the second mounting seat 5210.

In practical use, one end of the first connection valve 5120 is connected to the liquid cooling pipeline, one end of the second connection valve 5220 is connected to the liquid supply device, and the flow channels in the first connection valve 5120 and the second connection valve 5220 are simultaneously opened through the matching connection between the first connection valve 5120 and the second connection valve 5220, so as to allow the cooling liquid in the liquid supply device to flow into the liquid cooling pipeline.

As shown in fig. 2, the first connection valve 5120 includes a first housing 5121 having a flow passage formed therein and a first spool 5122 telescopically and movably disposed in the flow passage to open and close the flow passage.

The first housing 5121 is an air structure, and has a first end and a second end arranged along a flow direction, the first end is an open structure, the second end is provided with a plurality of through holes, and a flow passage is formed between the open structure and the plurality of through holes.

The first spool 5122 includes a first core 5122a extending from a first end to a second end of the first housing 5121, and a valve plug 5122b telescopically and movably sleeved on one end of the first core 5122a corresponding to the first end and used for sealing the first core 5122a and the first housing 5121, wherein the valve plug 5122b telescopically moves to open or close the flow passage.

As shown in fig. 3, the second connection valve 5220 includes a second housing 5221 having a flow passage formed therein and a second valve element 5222 telescopically and movably disposed in the flow passage to open and close the flow passage.

The second housing 5221 is an air structure, and the outer diameter of the second housing 5221 is matched with the inner diameter of the first housing 5121, the second housing 5221 also has a first end and a second end arranged along the flow direction, the first end is an open structure and the second end is provided with a plurality of through holes, and a flow passage is formed between the open structure and the plurality of through holes.

One end of the second valve element 5222 is fixedly connected to the first end of the second housing 5221, and the other end is telescopically and movably connected to the second end of the second housing 5221 in the flow passage, and the second valve element 5222 is hermetically connected to the first end, and the corresponding flow passage is opened or closed by the telescopic movement of the second valve element 5222.

As shown in fig. 2, the first mounting seat 5110 is provided with a first positioning member 5130, as shown in fig. 3, the second mounting seat 5210 is provided with a second positioning member 5230, and when the first liquid-cooled connecting device 5100 is connected with the second liquid-cooled connecting device 5200, the first positioning member 5130 and the second positioning member 5230 are used for positioning, so that the connection accuracy is ensured, and the connection efficiency is improved. Specifically, the first positioning member 5130 may have a specific structural form of two positioning holes respectively disposed at both sides of the first connection valve 5120, and the second positioning member 5230 may have a specific structural form of two positioning posts respectively disposed at both sides of the second connection valve 5220; the first positioning member 5130 and the second positioning member 5230 may be disposed oppositely, or may have other positioning structures to meet the positioning requirement.

As also shown in fig. 2, the end face of the first core 5122a is recessed at a predetermined depth position of the first end face of the first end portion, and a guide structure is provided in a region of the first shell 5121 higher than the end face of the first core 5122 a. The guide structure may be a guide slope, and of course, any other structure having a guide function may be used, so that the guide structure at the front end of the first core 5122a can achieve more precise butt joint of the second connection valve 5220 and the first connection valve 5120 while the first positioning member 5130 and the second positioning member 5230 are positioned, thereby improving the sealing connection efficiency.

When the first connection valve 5120 is connected to the second connection valve 5220, the edge of the second housing 5221 pushes the plug 5122b of the first valve element 5122 to retract the plug 5122b inwardly relative to the first valve element 5122a, and simultaneously the first valve element 5122a pushes the second valve element 5222 to retract the second valve element 5222 inwardly toward the second housing 5221, so that the flow passages of the first housing 5121 and the second housing 5221 are simultaneously opened, and the first housing 5121 and the second housing 5221 are hermetically connected due to the insertion of the second housing 5221 into the first housing 5121.

As shown in fig. 3, the second mounting seat 521 is further provided with a sealing ring 5240 surrounding the second connection valve 5220, after the first connection valve 5120 is connected with the second connection valve 5220, the sealing ring 5240 is pressed to keep the first mounting seat 5110 and the second mounting seat 5210 in a sealing connection, so that the sealing performance of the first connection valve 5120 and the second connection valve 5220 is ensured, and even if a slight leakage phenomenon occurs, the liquid cannot leak to threaten or influence other components in the use environment.

According to the liquid-cooling connection assembly 5000 of this embodiment 1, the first liquid-cooling connection device 5100 and the second liquid-cooling connection device 5200 are connected in a mating manner, so that the openable and closable connectivity and the sealing property of the flow passage are ensured, and the risk of coolant dripping and the like is avoided. The liquid cooling connection assembly 5000 may be applied to all environments where liquid cooling pipe connections are implemented, such as pipe connections between a battery pack of an electric vehicle and a liquid supply device on the vehicle.

In another embodiment, the sealing ring can be arranged on the first mounting seat, sealing connection can be achieved, and the sealing ring can be arranged at will according to actual requirements.

Example 2

As shown in fig. 4 and 5, the present embodiment 2 discloses another battery pack 6000, and the battery pack 6000 is used in an electric vehicle for supplying power to the electric vehicle. And the battery pack 6000 has the first liquid-cooled connecting device 5100 or the second liquid-cooled connecting device 5200 of the structure in embodiment 5 described above, and the first liquid-cooled connecting device 5100 or the second liquid-cooled connecting device 5200 is provided as a horizontally opposing battery-side liquid-cooled connecting device on the battery pack 6000. In the horizontal docking type battery-side liquid-cooling connection device, the first and second mounting

seats

5110 and 5210 and the first and

second connection valves

5120 and 5220 are collectively referred to as a mounting seat and a connection valve.

When the battery pack 6000 is installed on the electric automobile, the liquid cooling connecting device at the horizontal butt joint type battery end is communicated with a liquid supply device which is used for providing cooling liquid on the electric automobile, so that the cooling liquid is introduced into a liquid cooling pipeline in the battery pack 6000, heat exchange is carried out on the battery module in the charging and discharging process in the battery pack 6000, and a proper working temperature environment is provided for the battery pack 6000. Here, the liquid supply device on the electric vehicle is connected through a liquid cooling pipe to a second liquid cooling connection 5200 or a first liquid cooling connection 5100 that mates with the horizontal docking battery-side liquid cooling connection on the battery pack 6000. That is, the first liquid-cooled connecting device 5100 or the second liquid-cooled connecting device 5200 is connected between the battery pack 6000 and the electric vehicle, respectively, and the first liquid-cooled connecting device and the second liquid-cooled connecting device can be arranged interchangeably.

Specifically, the mount pad sets up on the top surface or the side of battery package 6000, and the connecting valve is fixed in on the mount pad, and the plane direction of mount pad and the plane direction of battery package 6000 are the looks vertical setting to the plane direction and the circulation direction of mount pad are mutually perpendicular, that is to say, the circulation direction of circulation passageway is parallel with the plane direction of battery package 6000, thereby realize the intercommunication with electric automobile liquid cooling pipeline behind battery package 6000 with the horizontal direction installation to electric automobile. One end of the connecting valve, which is positioned at the inner side of the battery pack 6000, is connected with the liquid cooling pipeline in the battery pack 6000, and the other end of the connecting valve is used for being connected with the liquid supply device. The liquid supply device refers to a liquid supply device for supplying cooling liquid in the electric automobile or a liquid supply device arranged on a battery charging rack.

Here, the battery pack 6000 is detachably attached to the bottom of the electric vehicle by a locking device including a locking mechanism having an L-shaped locking groove and a plurality of locking shafts provided at both sides of the battery pack 6000. The battery pack 6000 is lifted in place by the bottom of the electric automobile and further moves along the length direction of the automobile body of the electric automobile, namely moves vertically and horizontally along the direction of the L-shaped locking groove until the battery pack 6000 is successfully locked when a locking shaft on the battery pack 6000 is matched with the locking groove of the locking mechanism. When the battery pack 6000 is vertically lifted in place, the liquid cooling connecting device at the horizontal butt joint type battery end is just aligned with the liquid supply device of the electric automobile, and along with the horizontal movement of the battery pack 6000, the connecting device of the liquid cooling pipeline of the liquid supply device of the electric automobile is communicated with the connecting valve on the battery pack 6000 and the flow passage of the connecting valve is opened.

According to the battery pack 6000 of this embodiment 2, in the process of installing the battery pack 6000 at the bottom of the electric vehicle, after the battery pack 6000 is vertically lifted in place, along with the continuous horizontal movement of the battery pack 6000, the liquid cooling connecting device on the liquid supply device of the electric vehicle and the connecting valve of the battery pack 6000 are gradually abutted to the sealing connection from the initial contact state and open the circulation passage, so that the sealing communication of the liquid cooling pipeline can be realized while the installation of the battery pack 6000 is realized, and the installation and connection process is simple and efficient.

According to the scheme of this embodiment 2, the installation seat is fixed relative to the battery pack 6000 in a vertical manner, and the flow direction of the flow channel of the connection valve is vertically arranged with the installation seat, that is, the flow direction of the flow channel of the connection valve is parallel to the horizontal direction of the battery pack 6000, so that the liquid cooling connection device and the liquid cooling pipeline of the electric vehicle can be quickly and hermetically communicated while the battery pack 6000 is lifted to the right position.

In another embodiment, the battery pack 6000 has all the features of the above embodiments, and further includes: the number of the liquid cooling connecting devices at the horizontal butt joint type battery ends is two, wherein one of the liquid cooling connecting devices is used as an input part of cooling liquid, and the other liquid cooling connecting device is used as an output part of the cooling liquid. The arrangement mode of the liquid cooling pipeline in the battery pack 6000 is more flexible by separately arranging the input part and the output part of the liquid cooling connecting device. Preferably, the two horizontal butt-joint type battery end liquid-cooling connecting devices are respectively arranged at two opposite ends of the battery pack 6000. The input part and the output part of the liquid cooling connecting device are arranged at the two ends of the battery pack 6000, so that the layout of liquid cooling pipelines in the battery pack 6000 can be optimized, the occupied space of the liquid cooling pipelines is reduced, and the heat exchange efficiency is improved.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a battery package, its characterized in that, includes horizontal dock battery end liquid cooling connecting device, horizontal dock battery end liquid cooling connecting device is used for linking to each other with the confession liquid device of the coolant liquid that provides to with the coolant liquid lets in the liquid cooling pipeline in the battery package, horizontal dock battery end liquid cooling connecting device includes:

the mounting seat is arranged on the battery pack; and

2. The battery pack according to claim 1,

the mounting seat is arranged on the top surface or the side surface of the battery pack, and the plane direction of the mounting seat is perpendicular to the plane direction of the battery pack and perpendicular to the circulation direction.

3. The battery pack according to claim 1,

the battery pack is detachably connected to the bottom of the electric automobile through a locking device, and when the battery pack lifted by the bottom of the electric automobile in place moves to a locking shaft on the battery pack along the length direction of an automobile body of the electric automobile and is matched with a locking groove of the locking device, a liquid supply device of the electric automobile is communicated with the connecting valve and opens the circulation channel.

4. The battery pack according to claim 1,

and a positioning part is arranged on the mounting seat, and the liquid supply device and the connecting valve are positioned through the positioning part.

5. The battery pack according to claim 4,

the positioning part comprises two positioning holes or two positioning columns which are respectively arranged at two sides of the connecting valve.

6. The battery pack according to claim 1,

and a sealing ring surrounding the connecting valve is arranged on the mounting seat.

7. The battery pack according to claim 1,

the connecting valve includes a housing in which the flow passage is formed, and a valve element that is provided in the flow passage so as to be movable in a telescopic manner to open and close the flow passage.

8. The battery pack according to claim 7,

the shell is provided with a first end part and a second end part which are arranged along the circulation direction, the first end part is an open structure, a plurality of through holes are formed in the second end part, and the circulation channel is formed between the open structure and the through holes.

9. The battery pack according to claim 8,

the case includes by the first end extends to the core and the scalable movable sleeve of second end are established the core with the one end that the first end corresponds just is used for sealing the core with the valve plug of casing, through the flexible removal of valve plug is opened or is closed the circulation passageway.

10. The battery pack according to claim 9,

the end face of the core is recessed at a predetermined depth of the first end, and a guide structure is arranged in a region of the shell higher than the end face of the core.

11. The battery pack according to claim 8,

one end of the valve core is fixedly connected with the second end part, the other end of the valve core is connected with the second end part in a telescopic and movable mode in the flow channel, and the valve core is connected with the first end part in a sealing mode.

12. The battery pack according to claim 1, wherein the number of the horizontal butt-joint type battery-side liquid-cooling connection devices is two, one of which serves as an input portion of the cooling liquid and the other serves as an output portion of the cooling liquid.

13. The battery pack of claim 12, wherein two of said horizontally opposing battery-side liquid-cooled connectors are disposed at opposite ends of said battery pack.

14. An electric vehicle characterized by comprising the battery pack according to claim 12 or 13.