CN218632219U - Battery pack - Google Patents

Abstract

The disclosure relates to the technical field of batteries, in particular to a battery pack, which comprises a cooling device, a box body and a battery; the cooling device comprises a liquid cooling pipeline; the box body comprises a plurality of beams, an accommodating space is defined by the beams, and the liquid cooling pipeline is arranged in the accommodating space; the battery is arranged in the accommodating space, the liquid cooling pipeline is positioned between the battery and the beam, an explosion-proof valve is arranged on the battery, and the explosion-proof valve is positioned at one end of the battery, which faces to the liquid cooling pipeline. The safety of the battery pack can be improved.

Description

Battery pack

Technical Field

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

Background

With the development and progress of technology, electric vehicles are increasingly used. A battery pack is provided in an electric vehicle for storing electric energy and supplying energy to the electric vehicle. In practical applications, due to problems such as heat generation of the batteries, thermal runaway of the batteries and the like may occur, which may affect safety of the batteries.

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

Disclosure of Invention

The present disclosure is directed to a battery pack, and therefore, to improve the safety of the battery pack at least to some extent.

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

a cooling device comprising a liquid cooling conduit;

the box body comprises a plurality of beams, an accommodating space is defined by the beams, and the liquid cooling pipeline is arranged in the accommodating space;

the battery, the battery is located the accommodation space, the liquid cooling pipeline be located the battery with between the roof beam, be provided with explosion-proof valve on the battery, and explosion-proof valve is located the battery orientation the one end of liquid cooling pipeline.

The embodiment of the disclosure provides a battery pack, including cooling device in battery pack, cooling device includes the liquid cooling pipeline, the liquid cooling pipeline sets up in the accommodation space that a plurality of roof beams of battery package box enclose, still be equipped with the battery that has explosion-proof valve in the accommodation space, the liquid cooling pipeline is located between the roof beam of battery and box, and the explosion-proof valve of battery is towards the liquid cooling pipeline, thereby can make the liquid cooling pipeline rupture through battery explosion-proof valve when battery package thermal runaway, cooling liquid in the liquid cooling pipeline acts on battery package, the battery burning or the explosion scheduling problem that lead to because thermal runaway has been solved, the security performance of battery package has been promoted.

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

Drawings

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

Fig. 1 is a schematic structural diagram of a battery pack according to an exemplary embodiment of the present disclosure.

Fig. 2 is a partial sectional view of a battery pack according to an exemplary embodiment of the present disclosure.

Fig. 3 is a top view of a bottom plate of a case of a battery pack according to an exemplary embodiment of the present disclosure.

Fig. 4 is a partial schematic view of a battery pack provided in an exemplary embodiment of the present disclosure.

Detailed Description

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

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

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

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

The exemplary embodiment of the present disclosure provides a battery pack, as shown in fig. 1 to 4, the battery pack including a cooling device, a case 200, and a battery 300; the cooling apparatus includes a liquid cooling pipe 100; the box body 200 comprises a plurality of beams which enclose an accommodating space, and the liquid cooling pipeline 100 is arranged in the accommodating space; the battery 300 is disposed in the accommodating space, the liquid cooling pipe 100 is disposed between the battery 300 and the beam, the battery 300 is provided with the explosion-proof valve 330, and the explosion-proof valve 330 is disposed at an end of the battery 300 facing the liquid cooling pipe 100.

The embodiment of the present disclosure provides a battery pack, including cooling device, box 200 and battery 300, cooling device includes liquid cooling pipeline 100, box 200 includes a plurality of roof beams and the accommodation space that is enclosed by a plurality of roof beams, liquid cooling pipeline 100 and battery 300 locate the accommodation space, liquid cooling pipeline 100 is located between battery 300 and the roof beam, be equipped with explosion-proof valve 330 on the battery 300, explosion-proof valve 330 is located the one end of battery 300 towards liquid cooling pipeline 100, thereby can make liquid cooling pipeline 100 rupture through battery 300 explosion-proof valve 330 when battery pack takes place the thermal runaway, the cooling liquid in liquid cooling pipeline 100 acts on battery 300 wraps, reduce the temperature of battery pack, the problem such as battery 300 burning or explosion that has solved because the thermal runaway leads to has promoted the security performance that battery 300 wrapped.

Further, the battery pack provided by the embodiment of the present disclosure further includes a support 500, the support 500 is located between the beam and the battery 300, the support 500 is connected to the tank 200, and the liquid-cooling pipe 100 is connected to the support 500. The supporting member 500 provides a supporting force for the liquid cooling pipe 100, so that the liquid cooling pipe 100 can be fixedly connected to the box body 200, the assembly stability of the liquid cooling pipe 100 in the battery pack can be ensured, and the stability of the whole battery pack is further improved.

The following will describe each part of the battery pack provided by the embodiment of the present disclosure in detail:

the battery pack provided by the embodiment of the present disclosure includes a plurality of batteries 300, and the plurality of batteries 300 are sequentially arranged. The battery pack may include a plurality of battery packs including at least one battery 300 therein, the plurality of battery 300 packs being sequentially arranged. The arrangement order of the plurality of battery 300 groups may be the same as or different from the arrangement order of the batteries 300 in the battery pack. For example, the plurality of battery packs are arranged in the arrangement direction of the plurality of batteries 300. Or a plurality of battery packs are arranged in a direction perpendicular to the arrangement direction of the plurality of cells 300. Or a part of the number of battery packs are arranged in the arrangement direction of the batteries 300 and the remaining number of battery packs are arranged in the direction perpendicular to the arrangement direction of the batteries 300.

For example, the battery 300 provided by the embodiment of the present disclosure may include a housing 303, a battery core 304, and a pole 310, where the battery housing 303 has a receiving cavity, the battery core 304 is disposed in the receiving cavity, the pole 310 is disposed in the battery housing 303, and the pole 310 at least partially protrudes into the receiving cavity. The case 303 serves to form an outer contour of the battery 300 and protect devices inside the battery 300. The housing 303 may be hollow cylindrical or hollow cubic.

In order to prevent the battery 300 from being exploded or burnt due to thermal runaway, the battery 300 may be provided with an explosion-proof valve 330, and the explosion-proof valve 330 may be provided in the case 303 of the battery 300. During the use process, the internal pressure of the battery 300 is rapidly increased due to the factors such as the failure of the battery 300, and the explosion-proof valve 330 is opened, so that the shell 303 of the battery 300 is broken, the internal pressure of the battery 300 is released, and the battery 300 is prevented from thermal runaway due to the overlarge internal pressure. The explosion-proof valve 330 may be provided on an end surface of the battery 300. The explosion-proof valve 330 may be a valve-like device, or may be an explosion-proof structure provided in the case 303 of the battery 300.

The battery pack 300 further includes a bus bar 320, and the bus bar 320 electrically connects the poles 310 of the plurality of batteries 300 to enable the plurality of batteries 300 to be connected in series, in parallel, or in series and parallel, so that the battery pack has sufficient electric energy.

In order to facilitate the installation of a plurality of batteries 300 or a plurality of electric groups in the battery pack, the battery pack further comprises a box body 200, the box body 200 may be of a cubic structure, and a cavity is formed inside the box body 200 and is used for accommodating the plurality of batteries 300 or the plurality of electric groups to be installed inside the box body 200. The volume of the case 200 is adapted to the total volume of the plurality of batteries 300 or the plurality of battery packs, for example, if the battery pack formed by the plurality of batteries 300 or the plurality of battery packs has a rectangular parallelepiped shape, the case 200 has a rectangular parallelepiped structure having a battery accommodating cavity. Or a plurality of batteries 300 or a plurality of battery packs, is in an irregular cubic structure, the case 200 has an irregular cubic structure with a cavity for accommodating the batteries.

The case 200 provides a mounting location for the plurality of batteries 300 or the battery pack, and after the plurality of batteries 300 or the battery pack are electrically connected through the bus bar 320, the batteries can be fixedly assembled in the case 200 to form a battery pack. The box body 200 includes a plurality of beams and a bottom plate 201, the plurality of beams are disposed on the bottom plate 201 of the box body 200, and the plurality of beams form an accommodating space. The beams of the box 200 may have a prism shape, and for convenience of manufacture and installation, the beams of the box 200 are generally rectangular parallelepiped structures. The beams of the box 200 may be integrally formed with the box 200, and a plurality of beams may be integrally formed on the box 200 by stamping or casting. Or after the beam of the case 200 and the case 200 are separately molded, the beam is coupled to the case 200 by welding or the like at a position corresponding to the case 200.

The accommodating space formed by the beams comprises an accommodating space surrounded by the edge beams 210, the edge beams 210 are beam-shaped structures arranged on the bottom plate 201 of the box body 200 facing the battery 300, the edge beams 210 are convexly arranged on the bottom plate 201 of the box body 200, and the edge beams 210 form the outer contour of the box body 200.

The box 200 further includes at least one middle beam 220, the middle beam 220 is a beam-shaped structure disposed on a surface of the bottom plate 201 of the box 200 facing the battery 300, the middle beam 220 is protruded on the bottom plate 201 of the box 200, the middle beam 220 is disposed in the accommodating space, the accommodating space surrounded by the edge beams 210 is divided into a plurality of battery compartments 340 by the middle beam 220, and each battery compartment 340 is used for accommodating a plurality of batteries 300 or battery packs. For example, the box body 200 includes two middle beams 220, the two middle beams 220 are vertically disposed, and the two middle beams 220 and the edge beams 210 may divide the accommodating space into four battery compartments 340. Or the number of the middle beams 220 may be multiple, and the plurality of middle beams 220 and the edge beams 210 divide the accommodating space into a plurality of battery compartments 340 to accommodate a plurality of batteries 300 or battery packs.

The battery pack provided by the embodiment of the present disclosure further includes a cooling device, the cooling device includes a liquid cooling pipeline 100, and the liquid cooling pipeline 100 includes a liquid inlet liquid cooling pipeline and a liquid outlet liquid cooling pipeline. In the actual working process, the battery pack generates heat inside the box body 200, the accumulation of a large amount of heat can cause the battery pack to generate the phenomenon of thermal runaway and the like, and a cooling device is arranged in the battery pack for cooling the battery pack. The cooling device comprises a cooling pipeline which can be a liquid cooling pipeline 100, cooling liquid is filled into the liquid cooling pipeline 100, heat generated by the battery pack is taken away through the flowing of the cooling liquid, and the effect of cooling the battery pack is achieved.

The cooling liquid flowing through the liquid cooling pipeline 100 may be a liquid with a large specific heat capacity, and may absorb a large amount of heat when the cooling liquid flows through the liquid cooling pipeline 100, and in addition, the cooling liquid is a non-corrosive liquid and is not corrosive to the housing 303 of the battery 300 or other components in the case 200, so as to ensure that the cooling liquid does not corrode the battery 300 or other components in the battery pack when the battery 300 is cooled. For example, the coolant may be one or more of a glycerin-based coolant, an alcohol-based coolant, a glycol-based coolant, a propylene glycol-based coolant, and the like.

Since the case 200 has an accommodating space surrounded by the plurality of side beams 210, the battery 300 is disposed in the accommodating space. The liquid cooling pipe 100 is disposed along a beam of the case 200, and the liquid cooling pipe 100 is disposed along a length direction of at least one side beam 210. The liquid-cooling pipe 100 is disposed between the battery 300 and the beam of the case 200, and the explosion-proof valve 330 of the battery 300 is located at an end of the battery 300 facing the liquid-cooling pipe 100, i.e., the explosion-proof valve 330 of the battery 300 is disposed facing the liquid-cooling pipe 100.

The cooling apparatus further includes a plurality of cold plates 400, the plurality of cold plates 400 being in communication with the liquid cooling conduit 100. The intermediate beam 220 in the box 200 divides the receiving space into a plurality of battery compartments 340, and a cold plate 400 is provided for each battery compartment 340. A liquid inlet and a liquid outlet are provided on each cold plate 400, and the liquid inlet and the liquid outlet on the cold plate 400 are provided on the side of the cold plate 400 facing the liquid cooling duct 100. The inlet and outlet of cold plate 400 are connected to liquid cooling pipeline 100, for example, the openings corresponding to the number of cold plates 400 can be directly arranged on liquid cooling pipeline 100, and the inlet or outlet of cold plate 400 is connected to the openings of liquid cooling pipeline 100, so that liquid cooling pipeline 100 and cold plate 400 are directly connected. Or a branch pipeline is arranged on the liquid cooling pipeline 100, and the liquid cooling pipeline 100 is connected with the liquid inlet or the liquid outlet of the cold plate 400 through the branch pipeline.

Illustratively, the liquid-cooled conduit 100 has a main inlet and a main outlet connected to the exterior of the battery pack. For example, the one end of liquid cooling pipeline 100 is total inlet, and is connected with the outside device of battery package, and when cooling battery 300, the outside device passes through total inlet and pumps coolant liquid into liquid cooling pipeline 100, through connecting in the cold drawing 400 inlet on liquid cooling pipeline 100, inside coolant liquid flowed into to a plurality of cooling plates, cools off battery 300. Or one end of the liquid cooling pipeline 100 is a main liquid outlet, after the plurality of cold plates 400 cool the battery 300, the cooling liquid in the cold plates 400 flows into the liquid cooling pipeline 100 through the liquid outlet of the cold plates 400, and then flows out of the battery pack through the main liquid outlet of the liquid cooling pipeline 100.

In the embodiment provided by the present disclosure, the explosion-proof valve 330 and the liquid-cooling pipe 100 are disposed opposite to each other, and the liquid-cooling pipe 100 is disposed directly facing the explosion-proof valve 330, and there is no other component between the two to space the two. In the working process of the battery 300, when the thermal runaway of the battery 300 occurs due to the problems of aging and the like, the explosion-proof valve 330 of the battery 300 is exploded, so that the liquid cooling pipeline 100 arranged opposite to the explosion-proof valve 330 of the battery 300 is ruptured, the cooling liquid in the liquid cooling pipeline 100 flows out and then is sprayed to cool the battery 300, the temperature of the battery 300 is reduced, and the phenomena of explosion or combustion and the like of the battery 300 caused by the thermal runaway of the battery 300 are prevented.

In the embodiment provided by the present disclosure, one end of the battery 300 close to the liquid cooling pipeline 100 is provided with a pole 310, the pole 310 is connected with a bus bar 320, and an insulating member 600 is arranged between the bus bar 320 and the liquid cooling pipeline 100. Since the bus bar 320 and the liquid-cooled pipe 100 are made of a material having electrical conductivity, in order to avoid electrical conductivity between the bus bar 320 and the liquid-cooled pipe 100, the insulating member 600 needs to be provided between the bus bar 320 and the liquid-cooled pipe 100.

The insulating member 600 may be an insulating coating that may be applied to the side of the fluid-cooled conduit 100 facing the bus bar 320, or an insulating coating may be applied to the side of the bus bar 320 facing the fluid-cooled conduit 100. Or the insulating member 600 may be an insulating plate or an insulating film made of an insulating material, the insulating plate or the insulating film being disposed between the bus bar 320 and the liquid-cooling pipe 100, and the insulating member 600 may be made of a material such as rubber or plastic.

It should be noted that, no matter the insulating member 600 is in the form of an insulating coating or an insulating plate, the insulating member 600 does not affect the normal working status of the bus bar 320 and the liquid cooling pipes 100, and the insulating member 600 provides insulation for the bus bar 320 and the liquid cooling pipes 100.

In the embodiment provided by the present disclosure, a first battery pack 301 and a second battery pack 302 are disposed in the accommodating space of the box 200, the first battery pack 301 and the second battery pack 302 include a plurality of batteries 300 arranged in sequence, and the arrangement direction of the first battery pack 301 and the second battery pack 302 may be the same as or different from the arrangement direction of the plurality of batteries 300.

Wherein, one side of the first battery pack 301, which is far away from the second battery pack 302, is provided with a first edge beam 211, a first liquid cooling pipeline 110 is arranged between the first edge beam 211 and the first battery pack 301, and the explosion-proof valve 330 of the battery 300 in the first battery pack 301 faces the first liquid cooling pipeline 110. One side of second group battery 302 far away from first group battery 301 is provided with second boundary beam 212, is provided with second liquid cooling pipeline 120 between second boundary beam 212 and the second group battery 302, and explosion-proof valve 330 of battery 300 among the second group battery 302 is towards second liquid cooling pipeline 120.

A first middle beam is arranged between the first battery pack 301 and the second battery pack 302, a first cold plate 410 and a second cold plate 420 are respectively arranged on two sides of the first middle beam, the first cold plate 410 is communicated with the first liquid cooling pipeline 110, and the second cold plate 420 is communicated with the second liquid cooling pipeline 120.

The first and second liquid cooling conduits 110, 120 have a general liquid inlet and a general liquid outlet, and the first and second cold plates 410, 420 have liquid inlets and outlets. In the process that the cold plate 400 cools the battery 300, the cooling liquid flows into the first liquid cooling pipeline 110 through the total liquid inlet, and then flows into the first cold plate 410 through the liquid inlet of the first cold plate 410 to cool the first battery pack 301; the cooling liquid flows into the second liquid-cooling pipe 120 through the total liquid inlet, and then flows into the second cold plate 420 through the liquid inlet of the second cold plate 420, so as to cool the second battery pack 302.

In the actual use process of battery package, battery 300 in first group battery 301 or the second group battery 302 can take place excessive inflation, the explosion-proof valve 330 of battery 300 is opened for first liquid cooling pipeline 110 or second liquid cooling pipeline 120 are cracked, the coolant liquid flows out from first liquid cooling pipeline 110 or second liquid cooling pipeline 120, cool first group battery 301 or second group battery 302, carry out the coolant liquid to the group battery and spray, in order to reduce the temperature of group battery, prevent that battery 300 from taking place thermal runaway, the security performance of battery package has been promoted.

The above embodiment of the present disclosure is described by taking two battery packs adjacently disposed in a battery pack as an example, in the practical application process of the battery pack, one battery pack may include a plurality of battery packs, the explosion-proof valve 330 of the battery 300 of each battery pack may be set to face one side of the liquid cooling pipeline 100 adjacent to the battery pack, and the liquid cooling pipeline 100 may be ruptured by opening each explosion-proof valve 330, so that the cooling liquid in the liquid cooling pipeline 100 performs spray cooling on the battery 300 or the battery pack.

The battery pack provided by the embodiment of the present disclosure further includes a support 500, the support 500 is located between the beam of the case 200 and the battery 300, and the support 500 is connected to the case 200, the liquid cooling pipe 100 is connected to the support 500, and the support 500 is configured to provide a mounting position connected to the case 200.

In an embodiment provided by the present disclosure, the supporting member 500 may be a supporting buckle, the supporting buckle has a clamping portion, the liquid cooling pipe 100 is clamped in the clamping portion, and the supporting buckle is connected to the beam of the box 200 or the bottom plate 201 of the box 200. The support member 500 may be integrally formed with the beam or the base plate 201 of the case 200, or the support member 500 may be coupled to the beam or the base plate 201 of the case 200 by welding or bonding, etc. In the present disclosure, the number of the support 500 is at least one, and the liquid cooling pipes 100 and the support 500 may be in a one-to-one correspondence relationship. Or in order to make the liquid cooling pipe 100 and the tank 200 have a more stable connection, one liquid cooling pipe 100 may be supported using a plurality of supports 500. Further, the plurality of supporting members 500 may have the same height on the beam or the bottom plate 201 of the case 200, so as to ensure that the liquid cooling pipe 100 has a higher flatness during assembly, and provide a flat surface for subsequent assembly of the battery 300.

In another embodiment provided by the present disclosure, a recessed portion may be provided on the beam of the tank 200, and the liquid cooling pipe 100 is provided in the recessed portion. In the present disclosure, a recess is provided according to the size of the upper beam of the tank 200, and the liquid cooling pipe 100 is provided in the recess. The recess may be a groove type structure provided on the beam of the tank 200, or may be a step type structure provided on the beam of the tank 200. The depth and length of the recess may be selected according to the length and depth of the liquid cooling pipe 100, and the depth of the recess may be greater than or equal to the diameter of the liquid cooling pipe 100 for better accommodation of the liquid cooling pipe 100.

The liquid cooling pipe 100 may further include a plurality of branch pipes connecting the liquid cooling pipe 100 and the cold plate 400. After the liquid cooling pipe 100 is installed in the depressed portion of the beam of the tank 200, the liquid cooling pipe 100 and the cold plate 400 are communicated through the branch pipe.

Illustratively, receiving holes may be provided in the beams for receiving the branch pipes, and the branch pipes may be disposed inside the beams of the cabinet 200 through the receiving holes, connecting the liquid cooling pipes 100 and the cold plate 400. Or the branch pipes may be provided outside the beams of the chamber 200, bypassing the beams of the chamber 200 to communicate the liquid cooling pipes 100 and the cold plates 400. In the present disclosure, the liquid cooling pipe 100 and the cold plate 400 may be connected by a branch pipe, or the liquid cooling pipe 100 and the cold plate 400 may be connected by other methods, which is not limited in the present disclosure.

The battery pack provided by the embodiment of the disclosure, including cooling device, box 200 and battery 300, cooling device includes liquid cooling pipeline 100, box 200 includes a plurality of roof beams and the accommodation space that is enclosed by a plurality of roof beams, accommodation space is located to liquid cooling pipeline 100 and battery 300, liquid cooling pipeline 100 is located between battery 300 and the roof beam, be equipped with explosion-proof valve 330 on the battery 300, explosion-proof valve 330 is located the one end of battery 300 towards liquid cooling pipeline 100, thereby can make liquid cooling pipeline 100 rupture through battery 300's explosion-proof valve 330 when the battery pack takes place the thermal runaway, the cooling liquid in liquid cooling pipeline 100 acts on the battery pack, reduce the temperature of battery pack, the problem such as battery 300 burning or explosion that has solved because the thermal runaway leads to has promoted the security performance of battery pack.

The battery pack provided in the embodiment of the present disclosure may be a square battery or a cylindrical battery, and the battery is described as the square battery in the foregoing embodiment, but the battery is not limited to the square battery in the embodiment of the present disclosure, and the battery may also be a cylindrical battery or a battery with another shape in practical applications.

For example, in the case of a cylindrical battery, the liquid cooling pipe 100 may be disposed on the cylindrical battery case 200, and the liquid cooling pipe 100 may be disposed between adjacent batteries 300 or disposed between a plurality of batteries 300. Wherein, the explosion-proof valve 330 of cylinder battery sets up towards liquid cooling pipeline 100, and when the cylinder battery took place the phenomenon such as the inflation is excessive, explosion-proof valve 330 was opened, made liquid cooling pipeline 100 to break simultaneously for the cooling in the liquid cooling pipeline 100 of flowing through also sprays the cooling to battery 300, with the temperature that reduces battery 300, prevents that battery 300 from appearing phenomenon such as thermal runaway.

In the battery pack composed of the cylindrical batteries, the number of the liquid cooling pipes 100 is at least one. The explosion-proof valve 330 of the cylindrical battery may be disposed at one end of the battery 300 facing the adjacent liquid-cooled pipes 100. If the battery pack further comprises the cold plate 400, the liquid cooling pipelines 100 are communicated with the cold plate 400, and liquid inlets or liquid outlets of the plurality of cold plates 400 are connected with the liquid cooling pipelines 100.

The arrangement of the liquid-cooled tube 100 in the cylindrical battery 300 or other structure of the battery 300 may be modified depending on the specific structure of the battery 300. For example, in a cylindrical battery, the liquid cooling pipe 100 may be disposed in a groove by forming a groove or the like on the case 200 corresponding to the liquid cooling pipe 100, so that the liquid cooling pipe 100 is assembled in the battery pack. Or the support member 500 may be disposed in a battery pack made of cylindrical batteries, and the support member 500 is connected to the box 200 of the battery pack, and provides a supporting fixing position for the liquid cooling pipe 100 through the support member 500.

The battery pack provided by the embodiment of the disclosure can be applied to an electric vehicle, and the battery pack is installed on the electric vehicle and provides energy for the electric vehicle.

In practical application, the battery pack can be mounted on a frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

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

Claims (11)

1. A battery pack, comprising:

a cooling device comprising a liquid cooling conduit;

the box body comprises a plurality of beams, an accommodating space is defined by the beams, and the liquid cooling pipeline is arranged in the accommodating space;

the battery, the battery is located the accommodation space, the liquid cooling pipeline be located the battery with between the roof beam, be provided with explosion-proof valve on the battery, and explosion-proof valve is located the battery orientation the one end of liquid cooling pipeline.

2. The battery pack according to claim 1, wherein the explosion-proof valve and the liquid cooling pipe are disposed opposite to each other.

3. The battery pack of claim 1, wherein the case includes a plurality of side beams, the plurality of side beams defining the receiving space, and the liquid cooling conduit is disposed along a length of at least one of the side beams.

4. The battery pack of claim 3, wherein the case further comprises:

at least one intermediate beam, the intermediate beam is arranged in the accommodating space and divides the accommodating space into a plurality of battery cabins,

the cooling device further comprises a plurality of cold plates, one cold plate is arranged in each battery compartment, and the cold plates are communicated with the liquid cooling pipelines.

5. The battery pack of claim 4, wherein the cold plate has a liquid outlet and a liquid inlet, and the liquid inlet and the liquid outlet are disposed on a side of the cold plate facing the liquid cooling conduit.

6. The battery pack according to claim 4, wherein the accommodating space is provided with a first battery pack and a second battery pack, a first edge beam is arranged on one side of the first battery pack, which is far away from the second battery pack, a first liquid cooling pipeline is arranged between the first edge beam and the first battery pack, and an explosion-proof valve of a battery in the first battery pack faces the first liquid cooling pipeline;

one side of the second battery pack, which is far away from the first battery pack, is provided with a second boundary beam, a second liquid cooling pipeline is arranged between the second boundary beam and the second battery pack, and an explosion-proof valve of a battery in the second battery pack faces to the second liquid cooling pipeline.

7. The battery pack of claim 6, wherein a first intermediate beam is disposed between the first battery pack and the second battery pack, wherein a first cold plate and a second cold plate are disposed on two sides of the first intermediate beam, respectively, the first cold plate is in communication with the first liquid cooling pipeline, and the second cold plate is in communication with the second liquid cooling pipeline.

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

a support member positioned between the beam and the battery and connected to the tank, the liquid cooling conduit being connected to the support member.

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

the bottom plate is provided with a plurality of beams;

the liquid cooling pipeline is clamped in the clamping part, and the supporting buckle is connected to the beam or the bottom plate.

10. The battery pack of claim 1, wherein the beam has a recess formed therein, and the liquid cooling conduit is disposed in the recess.

11. The battery pack according to any one of claims 1-10, wherein the battery has a post at an end thereof adjacent to the liquid-cooled conduit, the post having a bus bar attached thereto, and an insulator disposed between the bus bar and the liquid-cooled conduit.

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