CN220021263U - Battery pack and electricity utilization device with same - Google Patents

Abstract

The utility model discloses a battery pack and an electric device with the battery pack, wherein the battery pack comprises a shell, a plurality of battery monomers and a first heat exchange piece, a containing cavity is formed in the shell, the battery monomers are arranged in the containing cavity, the first heat exchange piece is arranged in the containing cavity and is in heat conduction connection with the shell, a sealed liquid cavity is formed in the first heat exchange piece, a heat exchange medium is filled in the liquid cavity, and the first heat exchange piece is in heat conduction connection with at least one part of battery monomers. According to the battery pack disclosed by the embodiment of the utility model, the heat exchange medium is utilized to radiate the battery monomer, meanwhile, the heat exchange medium can be prevented from corroding structural parts in the battery pack, the service life and the use safety of the battery pack are prolonged, and meanwhile, the manufacturing and assembling difficulties of the battery pack can be reduced.

Description

Battery pack and electricity utilization device with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack and an electric device with the battery pack.

Background

In the prior art, in order to ensure that the battery pack can be at a proper environment temperature, a cooling system is generally arranged to cool and radiate the battery pack so as to reduce the heat generated by the battery pack in the working process, thereby prolonging the service life and improving the working performance of the battery pack.

The cooling system of the battery pack is mostly immersed liquid cooling, namely, the shell of the battery pack is directly filled with cooling liquid.

However, the above cooling method has high requirements on the tightness of the shell and the manufacturing and assembling, so that the cooling effect and the use safety of the battery pack are affected, and meanwhile, the manufacturing difficulty of the battery pack is increased.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the battery pack which has the advantages of good heat dissipation effect, long service life, high use safety, simple manufacture and assembly and solves the technical problems of poor heat dissipation effect, low safety, high manufacture difficulty and the like of the battery pack in the prior art.

The utility model also aims to provide an electric device with the battery pack.

According to an embodiment of the present utility model, a battery pack includes: the shell is internally provided with a containing cavity; the battery units are arranged in the accommodating cavity; the heat exchange device comprises a housing, a first heat exchange piece, a second heat exchange piece and a battery cell, wherein the first heat exchange piece is arranged in the housing and is in heat conduction connection with the housing, a sealed liquid chamber is arranged in the first heat exchange piece, a heat exchange medium is filled in the liquid chamber, and the first heat exchange piece is in heat conduction connection with at least one part of the battery cell.

According to the battery pack disclosed by the embodiment of the utility model, the heat exchange medium is filled in the sealed liquid chamber, so that the heat dissipation of the battery monomer by the heat exchange medium is realized, the sealed liquid chamber can be used for directly sealing the heat exchange medium, the leakage phenomenon of the heat exchange medium in the use process is avoided, the heat exchange effect of heat exchange liquid is ensured, meanwhile, the heat exchange medium leakage is avoided, the corrosion of structural parts in the battery pack is avoided, the service life of the battery pack is prolonged, the use safety of the battery pack is improved, and in addition, the sealing performance of the shell is not required to be ensured to the greatest extent after the heat exchange medium is sealed by the sealed liquid chamber, so that the manufacturing difficulty of the shell is reduced, namely the manufacturing difficulty of the battery pack is reduced. In summary, the battery pack disclosed by the utility model has the advantages of good heat dissipation effect, long service life, high use safety and low manufacturing difficulty.

In some embodiments, a plurality of groups of battery modules are arranged in the shell at intervals, each group of battery modules comprises a plurality of battery cells arranged along a first direction, at least a part of the outer side of each group of battery modules is sleeved with the first heat exchange member or at least one group of battery modules is sleeved with the first heat exchange member.

In some embodiments, the first heat exchange member is filled in a gap between at least one group of the battery modules and an inner wall of the receiving chamber.

In some embodiments, a gap between any adjacent two of the battery modules is provided with a portion of the first heat exchanging member.

In some embodiments, the first heat exchange member is a flexible member.

In some embodiments, the battery pack further includes a liquid reservoir disposed in the housing, the liquid reservoir in communication with the liquid chamber through a first channel configured to convey the heat exchange medium toward the liquid reservoir.

In some embodiments, the first channel is configured as a one-way channel, the liquid reservoir further communicates with the liquid chamber through a second channel configured as a one-way channel to convey the heat exchange medium toward the liquid chamber.

In some embodiments, the battery pack further comprises a second heat exchange member, wherein a heat exchange flow channel is arranged in the second heat exchange member, the heat exchange flow channel exchanges heat with the liquid chamber, and the second heat exchange member is suitable for exchanging heat with the external environment of the battery pack.

In some embodiments, the second heat exchange member supports and exchanges heat with the battery cell.

In some embodiments, the heat exchange flow channel comprises a plurality of heat exchange branches connected in parallel, and two ends of each heat exchange branch are respectively provided with an inlet and an outlet.

The power utilization device comprises the battery pack.

According to the power utilization device provided by the embodiment of the utility model, the battery pack is adopted, so that the use safety of the power utilization device can be effectively improved, and the manufacturing difficulty of the power utilization device can be reduced.

Additional aspects and advantages of the utility model will become apparent in the following description or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a front view of a battery pack according to some embodiments of the present utility model.

Fig. 2 is a cross-sectional view taken along line A-A of fig. 1.

Fig. 3 is a cross-sectional view taken along line B-B of fig. 1.

Fig. 4 is a partial enlarged view of the region I in fig. 3.

Fig. 5 is a top view of a battery pack according to some embodiments of the utility model.

Fig. 6 is a schematic view of a second heat exchange member according to some embodiments of the present utility model.

Reference numerals:

1000. a battery pack;

100. a housing; 110. a receiving chamber;

200. a battery module; 210. a battery cell;

300. a first heat exchange member; 310. a liquid chamber;

400. a liquid storage tank;

500. a second heat exchange member;

510. a heat exchange flow passage;

511. a heat exchange branch; 5111. an inlet; 5112. and an outlet.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

The battery pack 1000 according to the embodiment of the present utility model is described below with reference to the drawings of the specification.

As shown in conjunction with fig. 1 to 4, a battery pack 1000 according to an embodiment of the present utility model includes: the battery pack includes a housing 100, a plurality of battery cells 210, and a first heat exchange member 300.

As shown in fig. 1 and 2, the housing 100 has a receiving chamber 110.

As shown in fig. 2 and 3, a plurality of battery cells 210 are provided in the accommodating chamber 110. That is, the accommodating cavity 110 provides an installation space for the plurality of battery cells 210, so as to enable the plurality of battery cells 210 to be arranged in the housing 100, and is beneficial to protecting the plurality of battery cells 210 by the housing 100 while facilitating the formation of the battery pack 1000, so as to prolong the service life of the battery cells 210 and improve the use safety of the battery cells 210.

As shown in fig. 3, 4 and 5, the first heat exchange member 300 is disposed in the accommodating cavity 110 and the first heat exchange member 300 is in heat conduction connection with the housing 100, a sealed liquid chamber 310 is disposed in the first heat exchange member 300, a heat exchange medium is filled in the liquid chamber 310, and the first heat exchange member 300 is in heat conduction connection with at least a part of the battery cells 210. That is, the first heat exchange member 300 is in heat conduction connection with the housing 100 and at least a portion of the battery cells 210, so that the heat of at least a portion of the battery cells 210 is conducted out by using the first heat exchange member 300, thereby achieving the purpose of dissipating heat of the battery cells 210, enabling the self temperature of the battery cells 210 to be maintained within a suitable temperature range, prolonging the service life of the battery cells 210, and ensuring the use safety of the battery cells 210.

As can be seen from the above structure, in the battery pack 1000 according to the embodiment of the utility model, the first heat exchanging member 300, which is thermally connected with the housing 100 and at least a portion of the battery cells 210, is disposed in the accommodating cavity 110, and the heat of at least a portion of the battery cells 210 is conducted out by the first heat exchanging member 300, so as to achieve the purpose of dissipating heat of the battery pack 1000.

In addition, the heat exchange medium is filled in the liquid chamber 310, so that at least a part of the battery cells 210 can be cooled by the heat exchange medium, and the battery cells 210 can be prevented from being directly immersed in the heat exchange medium, so that the heat exchange medium is prevented from corroding the battery cells 210 and other structural members in the accommodating cavity 110, the service life of the battery pack 1000 is prolonged, and the use safety of the battery pack 1000 is improved.

It should be noted that, in the present utility model, the liquid chamber 310 is configured to have a sealing structure, so that when the heat exchange medium is filled into the liquid chamber 310, the risk of leakage can be reduced, and the heat exchange medium is prevented from corroding the battery unit 210 and other structural members in the accommodating cavity 110, and meanwhile, the sealing structure of the housing 100 can be simplified correspondingly, that is, the sealing performance of the housing 100 is not guaranteed to the greatest extent in the process of forming the housing 100, so that the manufacturing difficulty of the housing 100, that is, the manufacturing difficulty of the battery pack 1000 is reduced.

As can be seen from the above, the first heat exchange member 300 having the liquid chamber 310 is provided in the present utility model, the liquid chamber 310 is sealed, and the heat exchange medium is filled in the liquid chamber 310, so that the heat exchange medium is utilized to dissipate heat of the battery pack 1000, and meanwhile, the heat exchange medium is prevented from corroding the structural members in the accommodating chamber 110, and meanwhile, the manufacturing difficulty of the housing 100 is reduced, so that the battery pack 1000 of the present utility model has the advantages of good heat dissipation effect, long service life, high use safety, low manufacturing difficulty, etc.

It can be appreciated that, compared with the prior art, the first heat exchange member 300 with better sealing performance is arranged in the accommodating cavity 110, and the heat exchange medium is filled in the first heat exchange member 300, so as to improve the heat dissipation effect of the battery pack 1000, prolong the service life of the battery pack 1000, improve the use safety of the battery pack 1000 and reduce the manufacturing difficulty.

In some examples, the heat exchange medium is an insulating liquid (e.g., insulating oil). The insulating liquid is filled in the liquid chamber 310, so that the heat dissipation effect is ensured, and meanwhile, the electric connection between the battery monomers 210 caused by the leakage of the heat exchange medium can be avoided, thereby ensuring the working performance of the battery pack 1000 and improving the use safety of the battery pack 1000.

It should be noted that, because the liquid can slowly flow under the action of the temperature difference and has a larger heat capacity, the temperature rising is also relatively slow, and the utility model can play a positive role in inhibiting thermal runaway, therefore, the sealed liquid chamber 310 is arranged in the first heat exchange member 300, and the heat exchange medium formed into the insulating liquid is filled in the liquid chamber 310, so as to achieve the purpose of dissipating heat of at least a part of the battery cells 210 by using the heat exchange medium, so that the heat on the battery cells 210 can be effectively transferred, the self temperature of the battery cells 210 can not exceed the limit value, the consistency of the temperatures at all positions of the battery cells 210 can be effectively ensured, and the heat dissipation effect is improved.

In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In some embodiments of the present utility model, as shown in fig. 1 and 3, a plurality of groups of battery modules 200 are provided in the case 100 at intervals, and each group of battery modules 200 includes a plurality of battery cells 210 arranged in a first direction. The first direction is understood as a left-right direction shown in fig. 3, that is, each group of battery modules 200 includes a plurality of battery cells 210 arranged along the left-right direction of the housing 100, and the plurality of battery cells 210 cooperate to increase the capacity of the battery pack 1000 and enhance the user experience.

Optionally, at least a portion of the outer sides of each battery module 200 is externally coated with the first heat exchanging member 300 or at least one battery module 200 of the plurality of battery modules 200 is externally coated with the first heat exchanging member 300. That is, the first heat exchange member 300 may be sleeved on one of the battery modules 200 in the plurality of battery modules 200 so as to utilize the first heat exchange member 300 to dissipate heat of the battery modules 200, and of course, the first heat exchange member 300 may also be sleeved outside each of the plurality of battery modules 200, and the first heat exchange member 300 may cover at least a portion of the battery modules 200, so as to achieve the purpose of utilizing the first heat exchange member 300 to dissipate heat of the battery modules 200, and reduce the temperature of the battery modules 200.

In some examples, the first heat exchange member 300 is sleeved outside each group of battery modules 200 in the plurality of groups of battery modules 200, and the first heat exchange member 300 covers at least a portion of the battery modules 200, so that the first heat exchange member 300 can simultaneously radiate heat to the plurality of groups of battery modules 200 in the battery pack 1000, reduce the temperature of the battery pack 1000, and improve the use safety of the battery pack 1000.

Optionally, the height of the first heat exchange member 300 is equal to or greater than the height of the battery module 200, so that when the first heat exchange member 300 is sleeved on the battery module 200, the contact area between the first heat exchange member 300 and the battery module 200 can be ensured, the heat exchange efficiency between the first heat exchange member 300 and the battery module 200 is further improved, the heat dissipation effect is ensured, and meanwhile, the heat exchange medium can be fully contacted with the battery module 200 in the height direction, and the temperature uniformity of the battery module 200 in the height direction is improved.

In some examples, the first heat exchanging member 300 is provided with a mating opening, and one of the battery modules 200 is assembled in the mating opening, so as to cover the first heat exchanging member 300 on the battery module 200, thereby ensuring the heat dissipation effect.

Alternatively, as shown in fig. 2 and 3, the gap between at least one set of battery modules 200 and the inner wall of the receiving chamber 110 is filled with the first heat exchanging member 300. It may be understood that, in the plurality of groups of battery modules 200, the first heat exchange member 300 is filled between at least one group of battery modules 200 and the inner wall of the accommodating cavity 110, and at this time, the heat on the battery modules 200 can be transferred to the inner wall of the accommodating cavity 110 by using the first heat exchange member 300, that is, transferred to the housing 100, and then the heat is led out by using the housing 100, so as to achieve the purpose of dissipating the heat of the battery modules 200 and ensure the heat dissipation effect.

In some examples, the gaps between each group of battery modules 200 and the inner wall of the receiving chamber 110 are filled with the first heat exchange member 300. So that the first heat exchange member 300 can simultaneously radiate heat from all the battery modules 200 in the battery pack 1000, reduce the temperature of the battery pack 1000, and improve the use safety of the battery pack 1000.

Alternatively, as shown in fig. 2 and 3, the gap between any adjacent two battery modules 200 is provided with a portion of the first heat exchanging member 300. Here, in the plurality of sets of battery modules 200, a gap is formed between any two adjacent battery modules 200, and a portion of the first heat exchanging member 300 is filled in the gap, so that the first heat exchanging member 300 is not only filled between the battery modules 200 and the inner wall of the accommodating cavity 110, but also between the two adjacent battery modules 200, so that the first heat exchanging member 300 can fully contact with the battery modules 200, thereby achieving the purpose of dissipating heat of the battery modules 200, and improving the heat dissipation effect.

In a specific example, the first heat exchange member 300 forms a three-dimensional heat exchange member, the appearance shape of the three-dimensional heat exchange member is similar to that of the battery pack 1000 (for example, the first heat exchange member 300 is formed into a cuboid), a plurality of matching openings are formed in one side surface of the first heat exchange member 300, the number of the plurality of matching openings is consistent with that of the plurality of battery modules 200, the opening positions of the plurality of matching openings are in one-to-one correspondence with the positions of the plurality of battery modules 200, the first heat exchange member 300 is sleeved on the plurality of battery modules 200 through the plurality of matching openings, and the outer peripheral wall of the first heat exchange member 300 is in contact with the inner wall of the accommodating cavity 110 after the sleeving is completed, so that the first heat exchange member 300 is sleeved on the battery modules 200, and the first heat exchange member 300 is arranged between the battery modules 200 and the inner wall of the accommodating cavity 110 and between two adjacent battery modules 200, so that the first heat exchange member 300 can be connected with the housing 100 and the battery modules 200 at the same time, and heat dissipation can be conveniently performed by using the first heat exchange member 300.

In some embodiments of the utility model, the first heat exchange member 300 is a flexible member. So that the first heat exchange member 300 has elasticity, so that under the action of the heat exchange medium in the first heat exchange member 300, the first heat exchange member 300 can be ensured to be effectively attached to the battery module 200 and the housing 100, so as to solve the attaching problem of the first heat exchange member 300, the battery module 200 and the housing 100 in the manufacturing process, thereby ensuring that the first heat exchange member 300 has enough contact surface with the battery module 200 and the housing 100 to exchange heat, and ensuring the heat exchange effect.

Meanwhile, the first heat exchange member 300 is set to be a flexible member, and the first heat exchange member 300 can be formed to be a soft member, so that the manufacturing and assembling difficulties of the first heat exchange member 300 are reduced, and the rejection rate caused during manufacturing and assembling is reduced, thereby reducing the use cost of the first heat exchange member 300.

In some examples, the first heat exchange member 300 is made of silicone, that is, the first heat exchange member 300 is a silicone member, so as to implement forming the first heat exchange member 300 as a flexible member.

Of course, in other examples, the first heat exchanging member 300 may be made of rubber, plastic, or the like, which is not limited herein.

It should be noted that, fig. 4 shows that the first heat exchanging member 300 is separately disposed with the battery module 200 and the housing 100 so as to illustrate the disposition position of the first heat exchanging member 300, and in a specific example, the first heat exchanging member 300 is tightly attached to the battery module 200 and the housing 100, so that the heat exchanging effect is maximally ensured.

In some embodiments of the utility model, as shown in fig. 1, 2 and 5, the battery pack 1000 further includes a liquid reservoir 400, the liquid reservoir 400 being provided to the housing 100, the liquid reservoir 400 being in communication with the liquid chamber 310 through a first passage configured to convey a heat exchange medium toward the liquid reservoir 400. In this way, part of the heat exchange medium in the liquid chamber 310 can be conveyed to the liquid storage tank 400 by using the first channel, so as to avoid the excessive internal pressure of the battery pack 1000, thereby improving the use safety of the battery pack 1000.

In some examples, when the liquid storage tank 400 is disposed outside the housing 100, the housing 100 is provided with a first opening that communicates the liquid storage tank 400 with the liquid chamber 310, and the first opening forms a first channel.

In other examples, when the liquid storage tank 400 may also be disposed inside the housing 100 and located in the liquid chamber 310, a second port that communicates with both sides of the interior of the liquid storage tank 400 is formed in the liquid storage tank 400, and the second port forms the first channel.

In a specific example, the heat exchange medium can raise the temperature of the battery module 200 when radiating heat, and based on the phenomenon of thermal expansion and cold contraction, the heat exchange medium can change the pressure in the liquid chamber 310 at this time, and the pressure increase caused by the larger temperature difference is more likely to exceed the pressure that the liquid chamber 310 can bear, so as to ensure the use safety of the liquid chamber 310, at this time, part of the heat exchange medium in the liquid chamber 310 can be conveyed to the liquid storage tank 400 by using the first channel, so as to reduce the pressure in the liquid chamber 310, ensure the use safety of the liquid chamber 310 and prolong the service life of the first heat exchange member 300.

In addition, when part of the heat exchange medium is conveyed to the liquid storage tank 400, the liquid level in the liquid storage tank 400 rises, and the upper gas of the liquid storage tank 400 is compressed, so that the gas has high compressibility and does not cause high pressure change in the liquid storage tank 400, the part of the heat exchange medium in the liquid chamber 310 can be effectively conveyed to the liquid storage tank 400, and the heat exchange medium steam is ensured not to be dissipated into the ambient air, so that waste is avoided.

Optionally, as shown in fig. 1, fig. 2 and fig. 5, the liquid storage tank 400 is disposed on the housing 100 and is located at an upper portion of the liquid chamber 310, so as to ensure that when the pressure in the liquid chamber 310 is reduced, the heat exchange medium in the liquid storage tank 400 can be automatically conveyed into the liquid chamber 310 through the first channel under the action of gravity, so as to achieve the purpose of supplementing the liquid in the liquid chamber 310, thereby ensuring that the heat exchange medium is filled in the liquid chamber 310, ensuring that the heat exchange efficiency of the heat exchange medium is in a stable state, and ensuring the heat exchange effect.

That is, in some examples, the first channel of the present utility model may convey the heat exchange medium toward the liquid storage tank 400, or may convey the heat exchange medium toward the liquid chamber 310, so as to balance the internal pressure of the liquid chamber 310, and improve the heat exchange efficiency while ensuring the heat exchange effect of the first heat exchange member 300.

Alternatively, the first channel is configured as a one-way channel, and the liquid reservoir 400 is also in communication with the liquid chamber 310 through a second channel configured as a one-way channel to convey the heat exchange medium towards the liquid chamber 310. That is, the first passage may be configured to only convey the heat exchange medium toward the liquid storage tank 400, and in this case, in order to convey the heat exchange medium toward the liquid chamber 310, the present utility model separately provides the second passage, through which the heat exchange medium is conveyed toward the liquid chamber 310, so as to supplement the liquid chamber 310 with liquid, thereby balancing the internal pressure of the liquid chamber 310.

In the description of the present utility model, a feature defining "first", "second" may explicitly or implicitly include one or more of such feature for distinguishing between the described features, no sequential or light weight fraction.

In some examples, when the liquid storage tank 400 is disposed outside the housing 100, a third port that communicates between the liquid storage tank 400 and the liquid chamber 310 is further formed in the housing 100, and the third port forms a second channel.

In other examples, when the liquid storage tank 400 may also be disposed inside the housing 100 and located in the liquid chamber 310, a fourth port is formed on the liquid storage tank 400 and communicates with two sides of the interior of the liquid storage tank 400, where the fourth port forms a second channel.

Optionally, a first one-way valve for controlling the on-off and one-way conduction of the first channel is arranged in the first channel, and when the first one-way valve is opened, the heat exchange medium can be conveyed towards the liquid storage tank 400 through the first channel, so that the internal pressure of the liquid chamber 310 is reduced; correspondingly, a second one-way valve which controls the on-off and one-way conduction of the second channel is arranged in the second channel, and when the second one-way valve is opened, the heat exchange medium can be conveyed towards the liquid chamber 310 through the second channel, so that the purpose of supplementing liquid for the liquid chamber 310 is achieved.

In a specific example, when the heat exchange medium is used to dissipate heat of the battery module 200 and the temperature of the heat exchange medium itself is increased, the volume of the heat exchange medium is increased, resulting in an increase in the internal pressure of the liquid chamber 310, and when the opening value of the first one-way valve is reached, the first one-way valve is opened, and at this time, part of the heat exchange medium in the liquid chamber 310 enters the liquid storage tank 400 through the first flow channel, so as to reduce the pressure in the liquid chamber 310; when the heat exchange medium does not exchange heat with the battery module 200 and the temperature is reduced, the volume of the heat exchange medium is reduced, at the moment, the internal pressure of the liquid chamber 310 is reduced, when the opening value of the second one-way valve is reached, the second one-way valve is opened, liquid in the liquid storage tank 400 is supplemented into the liquid chamber 310 through the second one-way valve, the heat exchange medium is fully filled in the liquid chamber 310, the heat exchange efficiency of the first heat exchange piece 300 is in a stable state, and noise generated by shaking of the heat exchange medium in the first heat exchange piece 300 is avoided.

In some examples, the liquid storage tank 400 is provided with a filling opening and a filling cover, and the filling cover is in sealing connection with the filling opening through a thread form so as to play a role of sealing the filling opening, and meanwhile, when the liquid storage tank 400 is used, heat exchange medium can be filled towards the inside of the liquid storage tank 400 through the filling opening, so that the quantity of the heat exchange medium in the liquid storage tank 400 is ensured to be sufficient, the heat exchange medium can be conveniently conveyed towards the liquid chamber 310 by using the second channel, and the heat exchange effect of the first heat exchange piece 300 is ensured.

In some examples, a baffle is disposed within the fluid reservoir 400 to reduce the volume of the fluid reservoir 400 and prevent noise from being generated by sloshing of the heat exchange medium within the fluid reservoir 400.

It should be noted that, in the drawings, the liquid storage tank 400 is shown in an example where the liquid storage tank 400 is disposed at an upper portion of the housing 100, and in other examples, the liquid storage tank 400 may be disposed at other positions such as a side portion or a bottom portion of the housing 100, which is not particularly limited in the present utility model.

In summary, it will be appreciated that the heat exchange medium of the present utility model flows primarily within the battery pack 1000 without the need to provide circulating power to reduce the overall energy consumption level of the battery pack 1000.

In some embodiments of the present utility model, as shown in fig. 2 and 3, the battery pack 1000 further includes a second heat exchanging member 500, and a heat exchanging flow channel 510 is disposed in the second heat exchanging member 500, and the heat exchanging flow channel 510 exchanges heat with the liquid chamber 310, and the second heat exchanging member 500 is adapted to exchange heat with the external environment of the battery pack 1000. That is, the second heat exchanging member 500 exchanges heat with the liquid chamber 310 and the external environment of the battery pack 1000 at the same time, so as to conduct out the heat in the liquid chamber 310 and improve the heat exchanging effect of the battery pack 1000.

In some examples, an opening communicating with the accommodating cavity 110 is formed in the housing 100, and the battery module 200 is disposed in the accommodating cavity 110 through the opening, so as to ensure that the battery module 200 can be effectively disposed in the housing 100, and reduce difficulty in arrangement of the battery module 200.

Optionally, the second heat exchange member 500 is disposed at the opening to close the opening, so as to prevent external dust, foreign matters, etc. from entering the accommodating cavity 110 through the opening, ensure the use safety of the battery module 200, and prolong the service life of the battery module 200; on the other hand, the second heat exchange member 500 may be disposed close to the first heat exchange member 300, so as to exchange heat between the second heat exchange member 500 and the first heat exchange member 300.

Meanwhile, the second heat exchanging member 500 can be directly contacted with the external environment of the battery pack 1000 by arranging the second heat exchanging member 500 at the opening, so that heat exchanging between the second heat exchanging member 500 and the external environment of the battery pack 1000 can be conveniently realized.

That is, the second heat exchanging member 500 of the present utility model not only exchanges heat with the battery module 200, but also serves as a cover plate of the case 100, so that it is unnecessary to separately provide structural members to form the cover plate, thereby simplifying the structure of the case 100 and reducing the manufacturing cost of the case 100, and simultaneously, the second heat exchanging member 500 can directly contact the external environment of the battery pack 1000, thereby facilitating the heat exchange between the second heat exchanging member 500 and the external environment of the battery pack 1000.

In some examples, a seal is provided between the second heat exchange member 500 and the housing 100 to enhance the sealing effect of the housing 100. The sealing member may be a rubber member, a silicone member, or the like, and the present utility model is not particularly limited.

Of course, in other examples, the second heat exchange member 500 may also be disposed in the housing 100 through an opening, and the second heat exchange member 500 exchanges heat with the external environment of the battery pack 1000 mainly through the side wall of the housing 100, so as to achieve the purpose of dissipating heat from the battery module 200.

It can be understood that when the heat exchange is performed on the battery pack 1000, the heat exchange can be performed between the first heat exchange member 300 and the battery module 200, at this time, the heat exchange medium in the liquid chamber 310 of the first heat exchange member 300 conducts the heat of the battery module 200, and then the heat exchange can be performed between the second heat exchange member 500 and the heat exchange medium, so that the heat of the heat exchange medium is conducted to the outside of the battery pack 1000, the purpose of heat dissipation of the battery module 200 is achieved, and the heat dissipation effect is improved.

In some examples, the heat exchange flow channel 510 of the second heat exchange member 500 is filled with a cooling liquid, and the cooling liquid exchanges heat with the heat exchange medium in the liquid chamber 310 and the external environment of the battery pack 1000, so as to conduct out the heat in the liquid chamber 310, and ensure the heat exchange effect of the battery pack 1000.

The cooling liquid can be cooling water, which can reduce the use cost of the cooling liquid while ensuring the heat exchange effect of the second heat exchange member 500.

Alternatively, as shown in fig. 2 and 3, the second heat exchange member 500 supports the battery cell 210 and exchanges heat with the battery cell 210. That is, the second heat exchanging member 500 exchanges heat with the liquid chamber 310 and also exchanges heat with the battery cell 210, so as to directly guide out part of the heat of the battery cell 210 to the outside of the battery pack 1000, thereby further improving the heat dissipation effect of the battery pack 1000.

Optionally, the second heat exchange member 500 is an integrally punched heat exchange plate, and the heat exchange plate is disposed at the bottom of the battery unit 210, so as to support the battery unit 210 by using the second heat exchange member 500, and improve the position stability of the battery unit 210.

In some examples, the first heat exchange member 300 is disposed between the second heat exchange member 500 and the battery cell 210, so as to increase the contact area between the second heat exchange member 500 and the first heat exchange member 300, and improve the heat exchange effect.

Optionally, as shown in fig. 3 and 6, the heat exchange flow channel 510 includes a plurality of heat exchange branches 511 connected in parallel, and two ends of each heat exchange branch 511 are respectively provided with an inlet 5111 and an outlet 5112. The inlet 5111 is utilized to convey the cooling liquid with a lower temperature to the heat exchange flow channel 510, so that heat exchange is performed by utilizing the cooling liquid and the heat exchange medium in the liquid chamber 310, and the cooling liquid with a higher temperature can be discharged by utilizing the outlet 5112 after heat exchange, so that the low-temperature cooling liquid is conveniently conveyed into the heat exchange flow channel 510 again, the temperature of the cooling liquid in the heat exchange flow channel 510 is always maintained in a proper temperature range, heat exchange between the cooling liquid and the heat exchange medium is conveniently realized, and the heat exchange effect is improved.

In some examples, the battery pack 1000 further includes a circulation pump for driving the cooling liquid in the heat exchange flow channel 510 to flow, so as to ensure that the cooling liquid with a lower external temperature can be delivered to the heat exchange flow channel 510 through the inlet 5111, and the cooling liquid with a higher temperature in the heat exchange flow channel 510 can be discharged through the outlet 5112, so as to ensure the heat exchange effect of the second heat exchange member 500.

It should be noted that, by arranging the plurality of heat exchange branches 511 in parallel, the plurality of heat exchange branches 511 can be utilized to dissipate heat of the battery modules 200 at different positions, so as to ensure that the plurality of battery modules 200 are at a uniform temperature, and improve the working performance of the battery pack 1000.

Optionally, as shown in fig. 6, each heat exchange branch 511 extends in an "S" shape, and the inlet 5111 of the heat exchange branch 511 is near the middle of the second heat exchange member 500, and the outlet 5112 of the heat exchange branch 511 is near the end of the second heat exchange member 500, so that the cooling liquid with higher temperature can be transported from the inner side to the outer side of the second heat exchange member 500, and preferentially emits the heat from the inner side, thereby reducing the temperature inside the battery pack 1000, and part of the heat outside the battery pack 1000 can be directly discharged through the casing 100, thereby reducing the temperature difference between the center and the edge of the battery pack 1000, and further improving the temperature uniformity of the battery pack 1000.

Optionally, as shown in fig. 3, the battery modules 200 arranged in a plurality of rows and a plurality of columns are disposed in the housing 100, each group of battery modules 200 includes a plurality of battery cells 210 sequentially arranged along the first direction, and each column of battery modules 200 is correspondingly provided with at least one heat exchange branch 511. It may be understood that the heat exchange flow channel 510 is configured to include a plurality of heat exchange branches 511 connected in parallel, so that each column of battery modules 200 may be correspondingly provided with at least one heat exchange branch 511, so that the heat of the battery modules 200 can be dissipated by using the at least one heat exchange branch 511 alone, thereby ensuring that the heat of the battery modules 200 can be dissipated rapidly, ensuring the heat exchange effect and improving the heat dissipation efficiency.

In a specific example, the number of columns of the battery modules 200 is consistent with the number of heat exchange branches 511, and each column of the battery modules 200 is opposite to one heat exchange branch 511, so that each heat exchange branch 511 only dissipates heat of a single column of the battery modules 200, and the heat exchange effect of the second heat exchange member 500 is improved.

Optionally, a connection plate is disposed on the outer portion of the casing 100, and the connection plate is formed on the connection point of the casing 100, so as to fix the casing 100, thereby improving the position stability of the battery pack 1000 when in use.

It should be noted that, in the drawings, examples in which the second heat exchanging member 500 is disposed at the lower side of the housing 100 are shown, and in other examples, the second heat exchanging member 500 may be disposed at other positions such as the left and right sides or the upper side of the housing 100, which is not particularly limited in the present utility model.

In summary, the heat dissipation manner of the battery module 200 according to the present utility model is mainly to provide the first heat exchange member 300 between the battery modules 200 and the housing 100, define the sealed liquid chamber 310 in the first heat exchange member 300, and fill the heat exchange medium in the sealed liquid chamber 310, so that the battery module 200 can transfer heat to the heat exchange medium through the side wall of the first heat exchange member 300 after heat generation, and the first heat exchange member 300 can exchange heat with the second heat exchange member 500, at this time, the heat exchange medium can directly transfer heat to the second heat exchange member 500, and the second heat exchange member 500 transfers heat to the external environment of the battery pack 1000, thereby achieving the purpose of heat exchange of the battery pack 1000, ensuring the heat exchange effect, improving the service safety of the battery module 200, and prolonging the service life of the battery module 200.

The following describes an electric device according to an embodiment of the present utility model.

An electrical device according to an embodiment of the present utility model includes: battery pack 1000.

The battery pack 1000 is the aforementioned battery pack 1000, and the specific structure of the battery pack 1000 is not described herein.

As can be seen from the above structure, the power consumption device according to the embodiment of the utility model can effectively improve the use safety of the power consumption device and reduce the manufacturing difficulty of the power consumption device by adopting the battery pack 1000.

The electric device may be a vehicle, an energy storage cabinet, a ship, an aircraft, or the like.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Two parallel heat exchange branches 511 are shown in fig. 6 for illustrative purposes, but it will be apparent to one of ordinary skill in the art after reading the above disclosure that it is within the scope of the present utility model to apply the disclosure to three or more parallel heat exchange branches 511.

Other configurations of the battery pack 1000 and the power consuming device having the same according to the embodiment of the present utility model are known to those skilled in the art, and will not be described in detail herein.

In the description herein, reference to the term "embodiment," "example," etc., means 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 utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A battery pack, comprising:

the shell is internally provided with a containing cavity;

the battery units are arranged in the accommodating cavity;

the heat exchange device comprises a housing, a first heat exchange piece, a second heat exchange piece and a battery cell, wherein the first heat exchange piece is arranged in the housing and is in heat conduction connection with the housing, a sealed liquid chamber is arranged in the first heat exchange piece, a heat exchange medium is filled in the liquid chamber, and the first heat exchange piece is in heat conduction connection with at least one part of the battery cell.

2. The battery pack according to claim 1, wherein a plurality of groups of battery modules are arranged at intervals in the housing, each group of battery modules comprises a plurality of battery cells arranged along a first direction, and at least a part of the outer sides of each group of battery modules are sleeved with the first heat exchange member or the outer sides of at least one group of battery modules in the plurality of groups of battery modules are sleeved with the first heat exchange member.

3. The battery pack according to claim 2, wherein the first heat exchanging member is filled in a gap between at least one group of the battery modules and an inner wall of the receiving chamber.

4. The battery pack according to claim 2, wherein a gap between any adjacent two of the battery modules is provided with a portion of the first heat exchanging member.

5. The battery pack of claim 1, wherein the first heat exchange member is a flexible member.

6. The battery pack of claim 1, further comprising a liquid reservoir disposed in the housing, the liquid reservoir in communication with the liquid chamber through a first passage configured to convey the heat exchange medium toward the liquid reservoir.

7. The battery pack of claim 6, wherein the first channel is configured as a one-way channel, the liquid reservoir further communicating with the liquid chamber through a second channel configured as a one-way channel to convey the heat exchange medium toward the liquid chamber.

8. The battery pack of any one of claims 1-7, further comprising a second heat exchange member having a heat exchange flow passage disposed therein, the heat exchange flow passage in heat exchange relationship with the liquid chamber, the second heat exchange member adapted to exchange heat with an external environment of the battery pack.

9. The battery pack of claim 8, wherein the second heat exchange member supports and exchanges heat with the battery cells.

10. The battery pack according to claim 8, wherein the heat exchange flow channel comprises a plurality of heat exchange branches connected in parallel, and both ends of each heat exchange branch are respectively provided with an inlet and an outlet.

11. An electrical device comprising a battery pack according to any one of claims 1-10.