CN218241970U

CN218241970U - Power battery pack

Info

Publication number: CN218241970U
Application number: CN202221866525.XU
Authority: CN
Inventors: 常红磊; 梁吉旺
Original assignee: Sunwoda Electric Vehicle Battery Co Ltd
Current assignee: Xinwangda Power Technology Co ltd
Priority date: 2022-03-22
Filing date: 2022-07-19
Publication date: 2023-01-06
Anticipated expiration: 2032-07-19

Abstract

The utility model discloses a power battery package. The utility model discloses a power battery package includes battery box, liquid cooling board and electric core group. Wherein, the battery box is provided with an installation cavity; the liquid cooling plate holding is in the installation cavity, and the liquid cooling plate includes main part, first water injection well choke and second water injection well choke, and the main part is provided with cooling chamber, water inlet and delivery port, and the water inlet all communicates in the cooling chamber with the delivery port, and the water inlet sets up in the middle part of main part, and first water injection well choke is provided with first passageway, and first passageway communicates in the water inlet, and the second water injection well choke is provided with the second passageway, and the second passageway communicates in the delivery port. The electric core group includes a plurality of electric cores, and a plurality of electric cores are arranged along the length direction of installation cavity, and each electric core is electrically conductive connection each other, and electric core group holding is in the installation cavity and is connected in the liquid cooling board. When the liquid cooling plate acts on the electric core group, water flow enters the cooling cavity from the water inlet, the hottest part of the electric core is preferentially cooled, and the rest parts of the electric core are cooled again, so that the effects of optimizing the cooling effect and improving the temperature equalizing effect are achieved.

Description

Power battery pack

Technical Field

The utility model relates to a battery field, in particular to power battery package.

Background

In the related art, when the battery core in the power battery pack is cooled, a conventional cooling means is cooling by using a liquid cooling plate. Rivers in the liquid cooling board are by battery package one end flow direction other end, and although electric core can be cooled off, the samming effect between each electric core is relatively poor, leads to the difference in temperature of each part electric core higher.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a power battery package can optimize cooling effect and samming effect.

According to the utility model discloses a liquid cooling plate of first aspect embodiment includes:

the battery box is provided with a mounting cavity, and the mounting cavity has set length and width; the battery cell group is accommodated in the installation cavity and comprises a plurality of battery cells which are distributed along the length direction of the installation cavity; the liquid cooling plate is contained in the installation cavity, one side of the cell group is attached to each cell in an attached mode, the liquid cooling plate comprises a main body, a first water nozzle and a second water nozzle, the main body extends in the length direction of the installation cavity to set the length and is attached to each cell in an attached mode, the main body is provided with a cooling cavity, a water inlet and a water outlet, the cooling cavity extends in the length direction of the main body, the extending range covers all the cells of the cell group, the water inlet and the water outlet are communicated with the cooling cavity, the water inlet is formed in the middle of the main body, the first water nozzle is connected to the main body at the water inlet, a first channel is formed in the first water nozzle and is communicated with the water inlet, the second water nozzle is connected to the main body at the water outlet, a second channel is formed in the second water nozzle, and the second channel is communicated with the water outlet.

According to the utility model discloses liquid cooling plate has following beneficial effect at least: the water inlet sets up in the middle part of liquid cooling plate main part, and rivers are when getting into the cooling chamber by the water inlet, and the hottest electric core in the electric core group of cooling can be given priority to, and all the other electric cores of recooling reach the effect of optimizing cooling effect and promotion samming effect, have guaranteed the life of power battery package.

According to some embodiments of the utility model, the battery box still is provided with the reinforcement, the reinforcement is followed the width direction of installation cavity set up in the installation cavity, the reinforcement is provided with first mounting hole and second mounting hole, follows the extending direction of reinforcement, first mounting hole with second mounting hole interval sets up, the water inlet corresponds to first mounting hole, the delivery port corresponds to the second mounting hole, first water injection well choke is worn to locate in the first mounting hole, the second water injection well choke is worn to locate in the second mounting hole.

According to some embodiments of the utility model, the main part still is provided with first partition, first partition follows the length direction of main part extends, first partition is separated the cooling chamber forms first accommodation space and second accommodation space, the water inlet communicate in first accommodation space, the delivery port communicates in the second accommodation space two tip of the length direction of main part, first accommodation space with the second accommodation space communicates.

According to some embodiments of the utility model, the main part still is provided with second partition part and third partition part, and is a plurality of second partition part and a plurality of third partition part set up respectively in the both sides of first partition part, the second partition part set up in the first accommodation space, the second partition part is followed the length direction of main part extends, the second partition part is separated first accommodation space forms a plurality of first runners, and is a plurality of first runner is followed the width direction interval of main part sets up, the third partition part set up in the second accommodation space, the third partition part is followed the length direction of main part extends, the third partition part is separated the second accommodation space forms a plurality of second runners, and is a plurality of the second runner is followed the width direction interval of main part sets up.

According to some embodiments of the invention, the water inlet with the delivery port all is provided with at least one, the second partition is provided with first opening, the third partition is provided with the second opening, first opening intercommunication is two adjacent first runner, second opening intercommunication is two adjacent the second runner, the water inlet corresponds to first opening, the delivery port corresponds to the second opening.

According to some embodiments of the invention, the water outlet is provided in the middle part of the main body.

According to the utility model discloses a some embodiments still include a plurality of baffles, a plurality of liquid cooling board and a plurality of electric core group, the baffle is followed the length direction of battery box extends, and is a plurality of the baffle is followed the width direction interval of battery box sets up, and two are adjacent the baffle and the baffle with inject the mounting groove between the battery box, each electric core group holding in each in the mounting groove, each liquid cooling board sets up respectively in each bottom of electric core group.

According to some embodiments of the present invention, the battery box is provided with a first end and a second end opposite to each other along a width direction of the installation cavity, the first end of the battery box is provided with a water inlet head, and the second end is provided with a water outlet head; the water inlet of the liquid cooling plate corresponding to the first end is connected to the water inlet head, the water outlet of the liquid cooling plate corresponding to the second end is connected to the water outlet head, and the water outlets of two adjacent liquid cooling plates are connected with the water inlet.

According to some embodiments of the utility model, still include into water head and play flood peak, it is with each to intake the head first water injection well choke links to each other, it is with each to go out the flood peak second water injection well choke links to each other.

According to some embodiments of the present invention, the battery case further comprises a heat insulating member accommodated in the mounting groove and disposed between the liquid cooling plate and the bottom surface of the battery case.

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

Drawings

The invention will be further described with reference to the following drawings and examples, in which:

fig. 1 is an exploded view of a liquid cooled plate according to an embodiment of the present invention;

fig. 2 is an exploded view of a part of the structure of a power battery pack according to an embodiment of the present invention;

fig. 3 is a schematic view of a power battery pack according to an embodiment of the present invention;

fig. 4 is a schematic flow diagram of a liquid cooling plate according to an embodiment of the present invention;

fig. 5 is a schematic view illustrating a water delivery and drainage mode of a power battery pack according to an embodiment of the present invention;

fig. 6 is a schematic view illustrating a water supply and drainage mode of another power battery pack according to an embodiment of the present invention;

reference numerals are as follows:

a main body 100;

a cooling cavity 110, a first accommodating space 111, and a second accommodating space 112;

a second partition 120, a first flow channel 121, a first opening 122, a second opening 123;

a first partition 130, a water inlet 140, a water outlet 150, a third partition 160, a second flow channel 161;

a first water nozzle 210, a first channel 211, a second water nozzle 220 and a second channel 221;

a water inlet head 310, a water outlet head 320, a first pipeline 330 and a second pipeline 340;

the battery box 400, the partition 410, the mounting groove 411, the first end 420 and the second end 430;

a reinforcement 500, a first mounting hole 510, a second mounting hole 520;

a heat shield 600;

the battery pack 700 and the battery cell 710;

cavity 800 is installed.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the directional descriptions, such as the directions or positional relationships indicated by upper, lower, front, rear, left, right, etc., are based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means is one or more, a plurality of means is two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

In the description of the present invention, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like 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 present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Referring to fig. 1 to 6, a first aspect of the present invention provides a power battery pack, including a battery box 400, a liquid cooling plate, and a battery pack 700. Wherein, the battery box 400 is provided with a mounting cavity 800, and the mounting cavity 800 has a set length and width. The battery pack 700 is accommodated in the installation cavity 800, and the battery pack 700 includes a plurality of battery cells 710 arranged along the length direction of the installation cavity 800. The liquid cooling plate is accommodated in the mounting cavity 800 and is attached to each of the battery cells 710 at one side of the battery cell pack 700 for cooling each of the battery cells 710.

The liquid cooling plate includes a main body 100, a first water nozzle 210 and a second water nozzle 220, wherein the main body 100 extends along the length direction of the installation cavity 800 to a set length and is attached to each battery cell 710. The main body 100 is provided with a cooling cavity 110, a water inlet 140 and a water outlet 150, the cooling cavity 110 extends along the length direction of the main body 100, and the extending range covers all the battery cells 710 of the battery cell pack 700, so that the cooling liquid introduced into the cooling cavity 110 can cool each battery cell 710. The water inlet 140 and the water outlet 150 are both communicated with the cooling chamber 110, and the water inlet 140 is disposed in the middle of the main body 100. The first water nozzle 210 is connected to the main body 100 at the water inlet 140, the first water nozzle 210 is provided with a first channel 211, and the first channel 211 is communicated with the water inlet 140. The second water nozzle 220 is connected to the main body 100 at the water outlet 150, the second water nozzle 220 is provided with a second channel 221, and the second channel 221 is communicated with the water outlet 150. Therefore, when the cooling liquid enters the cooling cavity 110 through the water inlet 140 from the first water nozzle 210, the electric cores 710 of the electric core assembly 700 corresponding to the middle part of the main body 100 can be cooled first.

According to the distribution characteristic of heat generation when the power battery pack is in an operating state, the heat of the cells 710 in the middle part of the cell group 700 is less likely to be transferred, so that the temperature of the cells 710 in the end parts is lower than that of the cells 710 in the middle part. When the liquid cooling board acts on electric core group 700, rivers get into cooling chamber 110 by water inlet 140, can be preferred to cool off the hottest part of electric core group 700, are located the electric core 710 of mid portion in cooling electric core group 700 promptly, all the other parts of cooling electric core group 700 afterwards, can effectively reduce the difference in temperature between the electric core 710 at middle part and both ends to reach the effect of optimizing cooling effect and promotion samming effect, guaranteed electric core group 700's life.

Referring to fig. 2 and 3, further, the battery box 400 is further provided with a reinforcing member 500, and the reinforcing member 500 is used for reinforcing the strength of the battery box 400, so that the battery box 400 is not easily deformed when being stressed. The reinforcing member 500 is disposed in the mounting cavity 800 along a width direction of the mounting cavity 800, the reinforcing member 500 is provided with a first mounting hole 510 and a second mounting hole 520, and the first mounting hole 510 and the second mounting hole 520 are spaced apart from each other along an extending direction of the reinforcing member 500. The water inlet 140 corresponds to the first mounting hole 510, and the water outlet 150 corresponds to the second mounting hole 520. First water injection well choke 210 wears to locate in first mounting hole 510, and second water injection well choke 220 wears to locate in second mounting hole 520, can guarantee when rivers accomplish the circulation at the liquid cooling board, reduces the occupation to battery box inner space, makes the space utilization of power battery package more reasonable.

Referring to fig. 1 and 4, in some embodiments, the main body 100 is further provided with a first partition 130, the first partition 130 is disposed along a length direction of the main body 100, the first partition 130 partitions the cooling cavity 110 to form a first accommodating space 111 and a second accommodating space 112, the water inlet 140 is communicated with the first accommodating space 111, and the water outlet 150 is communicated with the second accommodating space 112. At both end portions of the main body 100, the first receiving space 111 communicates with the second receiving space 112. After entering the first accommodating space 111 from the middle of the main body 100, the water flows spread and spread to both sides of the cooling cavity 110, and flows into the second accommodating space 112 from both ends of the main body 100 in the length direction, and the water flows in the flow to perform sufficient heat exchange with the heat source, thereby improving the cooling effect. Further, the water outlet 150 is disposed in the middle of the main body 100, so that water flows through the cooling cavity 110 sufficiently and is discharged, thereby further improving the cooling effect.

Referring to fig. 1, in some embodiments, the main body 100 is further provided with a second partition 120 and a third partition 160, the second partition 120 and the third partition 160 are respectively disposed at two sides of the first partition 130, the second partition 120 is disposed in the first receiving space 111, the second partition 120 extends along a length direction of the main body 100, the second partition 120 partitions the first receiving space 111 to form a plurality of first flow channels 121, and the plurality of first flow channels 121 are spaced along a width direction of the main body 100. The third partition 160 is disposed in the second accommodating space 112, the third partition 160 extends along the length direction of the main body 100, the third partition 160 partitions the second accommodating space 112 to form a plurality of second flow passages 161, and the plurality of second flow passages 161 are spaced along the width direction of the main body 100. The second partition part 120 and the third partition part 160 both have a turbulent flow effect, when flowing through, the water flow can be separated and flow to different first flow channels 121 or flow to different second flow channels 161, and the water flow newly entering the cooling cavity 110 can be more uniformly mixed with the existing water, so that the temperature uniformity is better. In addition, the arrangement of the first flow channels 121 and the second flow channels 161 can avoid the problem that the flow rate of water flow in the middle of the cooling cavity 110 is different from that of water flow on two sides, and the heat dissipation effect of the battery cell 710 is different, so that the temperature of each part of the battery cell 710 is different and the temperature uniformity is poor.

Referring to fig. 1, further, at least one of the water inlet 140 and the water outlet 150 is provided, the second partition 120 is provided with a first opening 122, the third partition 160 is provided with a second opening 123, the first opening 122 communicates with two adjacent first flow channels 121, the second opening 123 communicates with two adjacent second flow channels 161, the water inlet 140 corresponds to the first opening 122, and the water outlet 150 corresponds to the second opening 123. After entering the cooling chamber 110 through the water inlet 140, the water can flow to different first flow channels 121 through the first opening 122, and there is no need for only one first flow channel 121 corresponding to one water inlet 140, thereby saving the number of water inlets 140 required. Similarly, the water outlet 150 can collect the water flow of two adjacent second flow channels 161. When the second and

third partitions

120 and 160 are provided in plurality, the water inlets 140 and the water outlets 150 are also provided in plurality, the number of the second partitions 120 is equal to the number of the water inlets 140, and the number of the third partitions 160 is equal to the number of the water outlets 150. Furthermore, the two adjacent first flow channels 121 are symmetrically arranged with respect to the first opening 122, so that the flow rate of the water flowing from the first opening 122 to different first flow channels 121 is equal, and the temperature uniformity of the battery cell 710 can be further ensured.

Referring to fig. 1, in some embodiments, both the water inlet 140 and the water outlet 150 are provided at the upper end of the main body 100. When water is injected into the cooling chamber 110, the water is discharged from the water outlet 150 after the whole cooling chamber 110 is naturally filled with water. At this time, the water inflow of the water inlet 140 is equal to the water outflow of the water outlet 150, so that the cooling cavity 110 is always filled with water, and the heat generated by the battery cell 710 can be fully absorbed.

In some embodiments, the water outlet 150 of the main body 100 is disposed at the middle of the main body 100. After water flow enters the cooling cavity 110 from the water inlet 140 in the middle of the main body 100, the water flow diffuses towards two sides along the length direction of the main body 100 and flows into the second accommodating space 112 from two end parts in the length direction of the main body 100, and because the water outlet 150 is arranged in the middle of the main body 100, the water flow diffuses towards two sides and then flows back to the same distance through which the water outlet 150 flows, so that the cooling effect of the water flow on two sides is the same, and the temperature uniformity among the battery cells 710 is good.

In some embodiments, the power battery pack further includes a plurality of partition plates 410, a plurality of liquid cooling plates, and a plurality of electric core packs 700, wherein the partition plates 410 extend along the length direction of the battery box 400, the plurality of partition plates 410 are spaced along the width direction of the battery box 400, two adjacent partition plates 410 and the partition plates 410 define a mounting groove 411 with the battery box 400, each electric core pack 700 is accommodated in the mounting groove 411, and each liquid cooling plate is respectively disposed at the bottom of each electric core pack 700. The power battery pack has a mounting cavity 800 for accommodating multiple sets of electric core sets 700, so that the energy density of the power battery pack is increased. Meanwhile, as each electric core pack 700 is accommodated in different installation grooves 411 and the influence between the electric core packs is small, the cooling effect of the liquid cooling plate on the electric core pack 700 is good, the service life of the electric core 710 is ensured, and the overall service life of the power battery pack can be ensured.

Referring to fig. 5 and 6, the water supply and drainage to the liquid cold plates may take various forms, and will be described below with reference to two specific embodiments, it being understood that the following is only exemplary and not intended to limit the present application.

Referring to fig. 6, in the first embodiment, the battery box 400 is provided with a first end 420 and a second end 430 opposite to each other in the width direction of the battery box 400, the first end 420 of the battery box 400 is provided with a water inlet head 310, and the second end 430 is provided with a water outlet head 320; the water inlet 140 of the liquid cooling plate corresponding to the first end 420 is connected to the water inlet head 310, the water outlet 150 of the liquid cooling plate corresponding to the second end 430 is connected to the water outlet head 320, and the water outlets 150 of two adjacent liquid cooling plates are connected to the water inlet 140, that is, the liquid cooling plates are connected in series. The water inlet 140 is filled in the middle part, and the hottest part of the cell group 700 is preferentially cooled, so that the temperature uniformity among the cells 710 in the cell group 700 is improved.

Referring to fig. 5, in the second embodiment, the water inlet 310 is connected to each of the first water nozzles 210, for example, the first water nozzles 210 can be connected by a first pipeline 330 and merged to the water inlet 310, and the water outlet 320 is connected to each of the second water nozzles 220, for example, the second water nozzles 220 can be connected by a second pipeline 340 and merged to the water outlet 320, so as to realize the parallel connection between the liquid cooling plates. The water inlet head 310 is guaranteed to supply water to each liquid cooling plate independently, the temperature of water flow at the water inlet 140 of each liquid cooling plate can be enabled to be consistent, the water inlet 140 enters the middle of the liquid cooling plate, the hottest part of the electric core group 700 is cooled preferentially, and therefore the effect of balancing the temperature difference of the whole power battery pack is achieved.

Referring to fig. 2, in some embodiments, the power battery pack further includes a heat insulation member 600, the heat insulation member 600 is accommodated in the installation groove 411 and disposed between the liquid cooling plate and the bottom surface of the battery box 400, so as to prevent the liquid cooling plate from exchanging heat with the bottom surface too much, and then the liquid cooling plate is installed above the heat insulation member 600. Heat conduction structure glue is beaten to liquid cooling board top, glues with electric core group 700 through heat conduction structure and bonds together, makes the liquid cooling board can be abundant with electric core 710 heat exchange. It is understood that the insulation member 600 may be made of insulation cotton or other material with good thermal insulation properties.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. Furthermore, the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

Claims

1. A power battery pack, comprising:

the battery box is provided with a mounting cavity, and the mounting cavity has set length and width;

the battery core group is accommodated in the installation cavity and comprises a plurality of battery cores which are distributed along the length direction of the installation cavity;

the liquid cooling plate is contained in the installation cavity, one side of the cell group is attached to each cell in an attached mode, the liquid cooling plate comprises a main body, a first water nozzle and a second water nozzle, the main body extends in the length direction of the installation cavity to set the length and is attached to each cell in an attached mode, the main body is provided with a cooling cavity, a water inlet and a water outlet, the cooling cavity extends in the length direction of the main body, the extending range covers all the cells of the cell group, the water inlet and the water outlet are communicated with the cooling cavity, the water inlet is formed in the middle of the main body, the first water nozzle is connected to the main body at the water inlet, a first channel is formed in the first water nozzle and is communicated with the water inlet, the second water nozzle is connected to the main body at the water outlet, a second channel is formed in the second water nozzle, and the second channel is communicated with the water outlet.

2. The power battery pack of claim 1, wherein the battery box is further provided with a reinforcement, the reinforcement is arranged in the installation cavity along the width direction of the installation cavity, the reinforcement is provided with a first installation hole and a second installation hole, the first installation hole and the second installation hole are arranged at intervals along the extending direction of the reinforcement, the water inlet corresponds to the first installation hole, the water outlet corresponds to the second installation hole, the first water nozzle is arranged in the first installation hole in a penetrating manner, and the second water nozzle is arranged in the second installation hole in a penetrating manner.

3. The power battery pack according to claim 1, wherein the main body is further provided with a first partition portion, the first partition portion extends along a length direction of the main body, the first partition portion partitions the cooling cavity to form a first accommodating space and a second accommodating space, the water inlet is communicated with the first accommodating space, the water outlet is communicated with the second accommodating space, and the first accommodating space is communicated with the second accommodating space at two ends of the main body in the length direction.

4. The power battery pack according to claim 3, wherein the main body is further provided with a second partition part and a third partition part, a plurality of the second partition parts and a plurality of the third partition parts are respectively disposed on two sides of the first partition part, the second partition part is disposed in the first accommodating space, the second partition part extends along the length direction of the main body, the second partition part partitions the first accommodating space to form a plurality of first flow passages, the plurality of first flow passages are spaced along the width direction of the main body, the third partition part is disposed in the second accommodating space, the third partition part extends along the length direction of the main body, the third partition part partitions the second accommodating space to form a plurality of second flow passages, and the plurality of second flow passages are spaced along the width direction of the main body.

5. The power battery pack according to claim 4, wherein the water inlet and the water outlet are each provided with at least one, the second partition is provided with a first opening, the third partition is provided with a second opening, the first opening communicates with two adjacent first flow passages, the second opening communicates with two adjacent second flow passages, the water inlet corresponds to the first opening, and the water outlet corresponds to the second opening.

6. The power battery pack of claim 1, wherein the water outlet is disposed at a middle portion of the main body.

7. The power battery pack according to any one of claims 1 to 6, further comprising a plurality of partition plates extending in the length direction of the battery box, a plurality of liquid-cooling plates arranged at intervals in the width direction of the battery box, and a plurality of battery pack groups, wherein two adjacent partition plates and the battery box define therebetween mounting grooves, each battery pack group is accommodated in each mounting groove, and each liquid-cooling plate is arranged at the bottom of each battery pack group.

8. The power battery pack of claim 7, wherein the battery box is provided with a first end and a second end opposite to each other in the width direction of the mounting cavity, the first end of the battery box is provided with a water inlet head, and the second end of the battery box is provided with a water outlet head; the water inlet of the liquid cooling plate corresponding to the first end is connected to the water inlet head, the water outlet of the liquid cooling plate corresponding to the second end is connected to the water outlet head, and the water outlets of two adjacent liquid cooling plates are connected with the water inlet.

9. The power battery pack of claim 7, further comprising a water inlet head and a water outlet head, wherein the water inlet head is connected to each of the first water nozzles, and the water outlet head is connected to each of the second water nozzles.

10. The power battery pack of claim 7, further comprising a thermal insulation member received in the mounting groove and disposed between the liquid cooling plate and the bottom surface of the battery box.