CN218896692U

CN218896692U - Battery pack and power device with same

Info

Publication number: CN218896692U
Application number: CN202223356705.6U
Authority: CN
Inventors: 曲凡多; 杨振宇; 蒋海荣
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-04-21
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a battery pack and a power device with the battery pack, wherein the battery pack comprises a shell and a battery cell assembly, the shell comprises a bottom plate and a side beam connected to the bottom plate, the side beam and the bottom plate are matched to form an accommodating cavity with an upward opening in the shell, the battery cell assembly is arranged in the accommodating cavity, a runner for circulating immersion liquid is formed in the side beam, a first communication port is formed in the side beam, and the first communication port is communicated with the runner and the accommodating cavity. According to the battery pack disclosed by the embodiment of the utility model, the immersed liquid and the battery cell assembly can be used for carrying out heat exchange, so that the purpose of immersing and cooling is achieved, the cooling effect is improved, the temperature uniformity of the battery cell assembly is ensured, meanwhile, a runner for circulating the immersed liquid is directly formed in the boundary beam of the shell, the structure of the battery pack is fully utilized, and the volume of the battery pack and the cost of the battery pack are conveniently reduced.

Description

Battery pack and power device with same

Technical Field

The utility model relates to the technical field of power equipment, in particular to a battery pack and a power device with the battery pack.

Background

In the prior art, in order to ensure the use safety of a battery pack, a cooling system is generally adopted to cool a battery cell assembly in the battery pack.

At present, the cooling mode mainly uses water cooling, but the space occupied by a water cooling system is larger, a large number of water cooling belts are required to be arranged in a cell gap, the structure of a battery pack is complex, and the cooling efficiency is general because the water cooling is indirect contact.

In order to solve the above problems, in the prior art, an immersion cooling mode is also adopted to cool the battery cell so as to improve cooling efficiency, however, the existing immersion cooling system also increases the structure of the battery pack, and the amount of immersion liquid is more, so that the battery pack has high cost, large occupied space and heavy weight.

Disclosure of Invention

In view of this, the present utility model aims to propose a battery pack.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a battery pack, comprising: a housing including a floor and a side rail connected to the floor, the side rail and the floor cooperating to form an upwardly open receiving cavity within the housing; the battery cell assembly is arranged in the accommodating cavity; the side beam is internally provided with a runner for circulating immersion liquid, and is provided with a first communication port which is communicated with the runner and the accommodating cavity.

According to the battery pack disclosed by the embodiment of the utility model, the heat exchange between the immersion liquid and the battery cell assembly can be realized by forming the flow channel for circulating the immersion liquid in the boundary beam of the shell, so that the purpose of immersing cooling or heating is achieved, the cooling or heating effect is improved, and the temperature uniformity of the battery cell assembly, namely the use safety of the battery pack, is ensured; meanwhile, a runner for circulating immersion liquid is directly formed in the boundary beam of the shell, and thus structural members for forming the runner are not required to be independently arranged, so that the structure of the battery pack is fully utilized, the structure of the battery pack is simplified, the production cost of the battery pack is reduced, the volume of the battery pack can be reduced, and the battery pack can be conveniently arranged subsequently. That is, the battery pack of the application can not excessively increase the structure of the battery pack and the weight and the production cost of the battery pack when improving the heat exchange efficiency, so that the battery pack has the advantages of good heat dissipation effect, small volume, low production cost, light weight and the like.

In addition, the battery pack according to the above-described embodiment of the present utility model may have the following additional technical features:

according to some embodiments of the utility model, the side beam comprises a first side beam and a second side beam which are oppositely arranged in a first direction, the first communication port comprises a liquid inlet and a liquid outlet, one of the first side beam and the second side beam is provided with the liquid inlet, the other side beam is provided with the liquid outlet, and the liquid inlet and the liquid outlet are communicated with the containing cavity and the communication.

According to some embodiments of the utility model, a plurality of liquid outlets are arranged at intervals along a second direction on a side of the first side beam facing the accommodating cavity, and a plurality of liquid inlets are arranged at intervals along the second direction on a side of the second side beam facing the accommodating cavity, wherein the second direction is perpendicular to the first direction.

According to some embodiments of the utility model, the battery pack further comprises a circulating pump, wherein the circulating pump is arranged at the liquid inlet end of the first side beam and is used for driving the immersion liquid to circularly flow between the flow channel and the accommodating cavity; the opening areas of the liquid outlets gradually decrease towards the direction close to the liquid inlet end.

According to some embodiments of the utility model, a first separation beam extending along the first direction is arranged in the accommodating cavity, the first separation beam is used for dividing the accommodating cavity into a first accommodating area and a second accommodating area, the first accommodating area is suitable for accommodating the battery cell assembly, the second accommodating area is suitable for accommodating a battery management module, and the liquid inlet and the liquid outlet are opposite to the first accommodating area.

According to some embodiments of the utility model, the battery cell assembly comprises a plurality of battery cells arranged at intervals along the second direction, the length direction of each battery cell extends along the first direction, and two adjacent battery cells are arranged at intervals so as to form an avoidance channel between the two adjacent battery cells.

According to some embodiments of the utility model, a partition plate is arranged in the avoidance channel, a diversion channel extending along the first direction is formed in the partition plate, and two opposite ends of the diversion channel are respectively communicated with the liquid inlet and the liquid outlet.

According to some embodiments of the utility model, the partition plate is provided with a plurality of second communication ports on two opposite sides of the second direction, a plurality of diversion channels are formed in the partition plate, the diversion channels are sequentially arranged along a third direction, two adjacent diversion channels are communicated through the second communication ports, and the third direction, the second direction and the first direction are mutually perpendicular.

According to some embodiments of the utility model, a second dividing beam extending in a second direction is provided in the first receiving area, the second dividing beam being adapted to divide a plurality of cell receiving areas in the first receiving area, each cell receiving area being adapted to receive a group of the cell assemblies; and a third communication port for communicating two adjacent cell accommodating areas is formed in the second separation beam.

Another object of the present utility model is to provide a power plant.

a power device comprises the battery pack.

According to the power device provided by the embodiment of the utility model, the battery pack is adopted, so that the use safety of the power device is ensured, the production cost of the power device is reduced, and the structure of the power device is simplified.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic illustration of a housing of some embodiments of the utility model.

Fig. 2 is a schematic view of a battery pack according to some embodiments of the present utility model with a portion of the structure omitted.

Fig. 3 is a top view of a battery pack according to some embodiments of the present utility model with portions of the structure omitted.

Fig. 4 isbase:Sub>A cross-sectional view taken along linebase:Sub>A-base:Sub>A of fig. 3.

Fig. 5 is a partial schematic view of a plurality of divider plates in accordance with some embodiments of the utility model.

Fig. 6 is a top view of a battery pack according to some embodiments of the utility model.

Fig. 7 is a cross-sectional view of fig. 6 taken along line B-B.

Fig. 8 is a schematic view of a battery pack according to other embodiments of the present utility model with a part of the structure omitted.

Fig. 9 is a top view of a battery pack according to other embodiments of the present utility model with a portion of the structure omitted.

Reference numerals:

1000. a battery pack;

100. a housing;

110. a bottom plate;

120. edge beams;

121. a first side rail; 122. a second side rail;

123. a third side rail; 124. a fourth side rail;

125. a flow passage;

126. a first communication port; 1262. a liquid outlet;

130. a receiving chamber;

131. a first accommodation region; 1311. a cell receiving area;

132. a second accommodation region;

140. a first dividing beam; 150. a second separation beam; 160. an upper cover;

200. a cell assembly; 210. a battery cell;

300. a circulation pump;

400. a battery management module;

500. a partition plate; 510. a diversion channel; 520. and a second communication port.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

The present utility model will be described in detail below with reference to fig. 1 to 9 in conjunction with the embodiments.

As shown in fig. 1, 2 and 3, a battery pack 1000 according to an embodiment of the present utility model includes: a housing 100 and a cell assembly 200.

As shown in fig. 1, fig. 2, and fig. 3, the housing 100 includes a bottom plate 110 and a side beam 120, the side beam 120 is connected to the bottom plate 110, the side beam 120 and the bottom plate 110 cooperate to form an accommodating cavity 130 that is open upward in the housing 100, and the battery cell assembly 200 is disposed in the accommodating cavity 130. To realize that the battery cell assembly 200 is arranged in the housing 100, thereby being convenient for protecting the battery cell assembly 200 by using the housing 100, prolonging the service life of the battery cell assembly 200 and improving the use safety of the battery cell assembly 200.

As shown in fig. 1 and 4, a flow channel 125 is formed in the boundary beam 120, the flow channel 125 is used for circulating immersion liquid, and a first communication port 126 is formed in the boundary beam 120, and the first communication port 126 communicates with the flow channel 125 and the accommodating cavity 130. Thus, the immersion liquid in the flow channel 125 can flow into the accommodating cavity 130 through the first communication port 126, and the immersion liquid exchanges heat with the cell assembly 200, so as to cool or heat the cell assembly 200 in the accommodating cavity 130 by using the immersion liquid, thereby achieving the purpose of immersing cooling or immersing heating the cell assembly 200, and improving the cooling or heating efficiency of the cell assembly 200; accordingly, the immersion liquid in the accommodating cavity 130 can also flow into the flow channel 125 through the first communication port 126, so as to realize circulation of the immersion liquid, thereby enabling the immersion liquid to effectively cool or heat the cell assembly 200, prolonging the service life of the cell assembly 200, avoiding thermal runaway of the cell assembly 200, and ensuring the use safety of the cell assembly 200.

As can be seen from the above structure, in the battery pack 1000 according to the embodiment of the present utility model, the flow channel 125 through which the immersion liquid flows is formed in the side beam 120 of the housing 100, so as to cool or heat the battery cell assembly 200 by using the immersion liquid, thereby achieving the purpose of immersion cooling or immersion heating, and improving the cooling or heating effect, so as to ensure the temperature uniformity of the battery cell assembly 200, that is, ensure the use safety of the battery pack 1000.

Meanwhile, the flow channel 125 for circulating the immersion liquid is directly formed in the boundary beam 120 of the shell 100, so that structural members for forming the flow channel 125 are not required to be independently arranged, the structure of the battery pack 1000 is fully utilized, the structure of the battery pack 1000 is simplified, the production cost of the battery pack 1000 can be reduced, the volume of the battery pack 1000 is reduced, the weight of the battery pack 1000 is reduced, and the subsequent arrangement of the battery pack 1000 is facilitated.

That is, the battery pack 1000 of the present application can ensure the heat exchange effect, and at the same time, the structure of the battery pack 1000 is not complicated, and the weight and the production cost of the battery pack 1000 are not excessively increased, so that the battery pack 1000 has the advantages of good heat dissipation effect, small volume, low production cost, light weight and the like.

It can be appreciated that, compared to the prior art, the present application directly utilizes the self structure of the battery pack 1000 to define the flow channel 125 through which the immersion liquid flows, so that the immersion cooling or the immersion heating of the battery cell assembly 200 is achieved, and meanwhile, the structural members in the battery pack 1000 are not increased, thereby achieving the purposes of saving the production cost of the battery pack 1000, reducing the weight of the battery pack 1000 and reducing the occupied space of the battery pack 1000.

In some examples, the side rail 120 of the housing 100 is hollow inside to enable the formation of the flow channel 125 within the side rail 120. Meanwhile, the side beam 120 is hollow, so that the production cost of the side beam 120 can be reduced and the weight of the side beam 120 can be reduced.

Optionally, the side beam 120 of the housing 100 is extruded from aluminum alloy to reduce the difficulty in manufacturing the side beam 120, improve the structural strength of the side beam 120, and facilitate the formation of the flow channel 125 in the side beam 120.

In some embodiments of the present utility model, as shown in fig. 1, the side beam 120 includes a first side beam 121 and a second side beam 122, where the first side beam 121 and the second side beam 122 are disposed opposite to each other in a first direction, the first communication port 126 includes a liquid inlet and a liquid outlet 1262, one of the first side beam 121 and the second side beam 122 is provided with a liquid inlet, and the other is provided with a liquid outlet 1262, and both the liquid inlet and the liquid outlet 1262 are communicated with the accommodating cavity 130 and circulate. Thus, the immersion liquid in the flow channel 125 can flow into the accommodating cavity 130 through the liquid outlet 1262, so as to achieve the purpose of performing immersion cooling or immersion heating on the cell assembly 200 in the accommodating cavity 130 by using the immersion liquid, and meanwhile, the immersion liquid in the accommodating cavity 130 can also enter the flow channel 125 through the liquid inlet, so that the circulation of the immersion liquid is realized, and the cooling or heating effect is improved.

It should be noted that, the above-mentioned first direction may be understood as a front-rear direction shown in fig. 1, that is, the first side beam 121 and the second side beam 122 are disposed opposite to each other in the front-rear direction of the battery pack 1000, so that when one of the first side beam 121 and the second side beam 122 is provided with the liquid inlet and the other is provided with the liquid outlet 1262, the liquid inlet and the liquid outlet 1262 are disposed opposite to each other in the front-rear direction of the accommodating cavity 130, and the opposite arrangement ensures that the liquid led out from the liquid outlet 1262 can smoothly flow toward the liquid inlet to implement circulation of the immersion liquid, and that the immersion liquid can flow along the front-rear direction of the accommodating cavity 130 when the immersion liquid led out from the liquid outlet 1262 flows toward the liquid inlet, so that the immersion liquid can fully contact the cell assembly 200, and the cooling or heating effect is improved.

Optionally, the immersion liquid may be one of silicone oil, white oil, transformer oil, hydrocarbon or fluorinated liquid, so that heat exchange between the immersion liquid and the cell assembly 200 is facilitated, and meanwhile, the immersion liquid has a certain electrical insulation property, so as to prevent the cell assembly 200 from being shorted.

In some examples, as shown in fig. 1, the side beam 120 includes a third side beam 123 and a fourth side beam 124, the third side beam 123 and the fourth side beam 124 are disposed opposite to each other in a second direction, the second direction is perpendicular to the first direction, and the first side beam 121, the third side beam 123, the second side beam 122, and the fourth side beam 124 are sequentially connected end to form a frame structure and disposed on the bottom plate 110 to realize the receiving cavity 130 that forms an upward opening.

The above-mentioned second direction is understood to be the left-right direction shown in fig. 1, that is, the third side beam 123 and the fourth side beam 124 are disposed opposite to each other in the left-right direction of the battery pack 1000.

Optionally, as shown in fig. 6 and 7, the housing 100 further includes an upper cover 160, where the upper cover 160 is disposed on a side of the side beam 120 away from the bottom plate 110, so as to cover the accommodating cavity 130, thereby forming a closed accommodating cavity 130 in the housing 100, and the accommodating cavity 130 is suitable for accommodating the battery cell assembly 200 to achieve the purpose of accommodating and protecting the battery cell assembly 200.

In a specific example, the flow channel 125 includes a first flow channel formed in the first side rail 121, a second flow channel formed in the second side rail 122, and a third flow channel formed in the third side rail 123 and communicating the first flow channel and the second flow channel to ensure that the immersion liquid can flow in the side rail 120.

Optionally, as shown in fig. 1, a plurality of liquid outlets 1262 are disposed on a side of the first side beam 121 facing the accommodating cavity 130, the plurality of liquid outlets 1262 are arranged at intervals along the second direction, a plurality of liquid inlets are disposed on a side of the second side beam 122 facing the accommodating cavity 130, and the plurality of liquid inlets are arranged at intervals along the second direction. That is, the first communication port 126 on the first side beam 121 forms a liquid outlet 1262, and the first communication port 126 on the second side beam 122 forms a liquid inlet, so that the immersion liquid in the first side beam 121 can flow to the accommodating cavity 130 through the liquid outlet 1262, and accordingly, the immersion liquid in the accommodating cavity 130 can flow to the second side beam 122 through the liquid inlet, so as to realize the circulation flow of the immersion liquid between the accommodating cavity 130 and the flow channel 125.

It should be noted that, since the liquid outlet 1262 is disposed in the first side beam 121 and a first flow channel is formed in the first side beam 121, and the liquid inlet is disposed in the second side beam 122 and a second flow channel is formed in the second side beam 122, the immersion liquid entering the flow channel through the liquid inlet flows to the second flow channel first, flows along the extending direction of the second flow channel to flow to the third flow channel and the first flow channel in sequence, and flows into the first flow channel, and then is discharged out of the accommodating cavity 130 through the first liquid outlet 1262, so as to realize immersion cooling or immersion heating of the electrical core assembly 200 by the immersion liquid.

It should be further noted that, in the present application, by disposing the plurality of liquid outlets 1262 on the first side beam 121 and disposing the plurality of liquid outlets 1262 to be arranged at intervals along the second direction, on one hand, it is ensured that the immersion liquid in the flow channel 125 can be discharged in a large amount, and the immersion liquid in the accommodating cavity 130 is ensured, and on the other hand, it is ensured that the immersion liquid can cover a plurality of areas in the accommodating cavity 130, so as to enhance the cooling effect; accordingly, by arranging the plurality of liquid inlets on the second side beam 122 and arranging the plurality of liquid inlets at intervals along the second direction, it is ensured that the immersion liquid in the plurality of regions in the accommodating cavity 130 can smoothly and rapidly enter the flow channel 125, and the circulation efficiency of the immersion liquid, that is, the cooling effect, is improved.

Optionally, as shown in fig. 1, 2 and 3, the battery pack 1000 further includes a circulation pump 300, where the circulation pump 300 is disposed at the liquid inlet end of the first side beam 121, and the circulation pump 300 is used to drive the immersion liquid to circulate between the flow channel 125 and the accommodating cavity 130. That is, the immersion liquid can flow effectively, so as to achieve the purpose of immersing cooling or immersing heating of the cell assembly 200 by the immersion liquid.

In addition, the circulating pump 300 is disposed at the liquid inlet end of the first side beam 121, so that the circulating pump 300 can be supported by the first side beam 121 to improve the position stability of the circulating pump 300, so that the circulating pump 300 can effectively operate to drive the immersion liquid to flow, and on the other hand, when the circulating pump 300 is operated, the circulating pump 300 can effectively drive the immersion liquid to flow towards the first side beam 121 and flow into the first side beam 121.

Alternatively, as shown in fig. 1, the opening areas of the plurality of liquid outlets 1262 gradually decrease toward the liquid inlet end. Here, the opening areas of the liquid outlets 1262 are different, and the opening areas of the liquid outlets 1262 gradually decrease toward the direction close to the liquid inlet end of the first side beam 121, so that a large amount of immersion liquid is prevented from being discharged through the liquid outlet 1262 close to the liquid inlet end after the immersion liquid enters the first side beam 121, that is, the immersion liquid in the first side beam 121 can be discharged through the liquid outlets 1262, so that the immersion liquid discharged through the liquid outlets 1262 can cover a plurality of areas of the accommodating cavity 130.

Optionally, as shown in fig. 1, fig. 2 and fig. 3, the accommodating cavity 130 is provided with a first separation beam 140, the first separation beam 140 extends along a first direction, the first separation beam 140 is used for dividing the accommodating cavity 130 into a first accommodating area 131 and a second accommodating area 132, the first accommodating area 131 is suitable for accommodating the battery cell assembly 200, the second accommodating area 132 is suitable for accommodating the battery management module 400, and the liquid inlet and the liquid outlet 1262 are opposite to the first accommodating area 131. That is, the immersion liquid of the present application is only filled in the first accommodating area 131, the second accommodating area 132 is not filled with the immersion liquid, so that the use amount of the immersion liquid can be avoided while the cooling or heating of the cell assembly 200 by the immersion liquid is realized, the use cost of the immersion liquid is further reduced, and the weight of the battery pack 1000 can be prevented from being increased due to the excessive use of the immersion liquid, that is, the weight of the battery pack 1000 is reduced.

In some examples, the battery management module 400 is communicatively coupled to the circulation pump 300 to enable control of the operation of the circulation pump 300 using the battery management module 400.

Alternatively, as shown in fig. 1, 2 and 3, the cell assembly 200 includes a plurality of cells 210 arranged at intervals along a second direction of the plurality of cells 210, and a length direction of the cells 210 extends along the first direction. That is, the extending direction of the length of the electric core 210 is consistent with the flowing direction of the immersion liquid in the accommodating cavity 130, so that the electric core 210 is prevented from obstructing the flow of the immersion liquid, and the immersion liquid can be fully contacted with the electric core 210, and the contact area is increased, so that the heat exchange effect is further improved, the temperature of the electric core 210 can be always kept within a proper temperature range, and the use safety of the electric core 210 is improved, namely, the use safety of the battery pack 1000 is improved.

In some specific examples, the immersion liquid contacts the large surface of the cell 210 when flowing, so as to increase the contact area between the immersion liquid and the cell 210 and improve the heat exchange effect.

Optionally, two adjacent cells 210 are spaced apart to form a back-off channel between two adjacent cells 210. The avoidance channel is used for avoiding the immersion liquid so as to ensure that the immersion liquid can effectively flow between two adjacent electric cores 210, so that the immersion liquid can fully contact with the surfaces of the electric cores 210, and the electric cores 210 can be heated or cooled by the immersion liquid better.

Optionally, a partition plate 500 is disposed in the avoidance channel, as shown in fig. 5, a diversion channel 510 is formed in the partition plate 500, the diversion channel 510 extends along the first direction, and opposite ends of the diversion channel 510 are respectively communicated with the liquid inlet and the liquid outlet 1262. The immersion liquid guided out through the liquid outlet 1262 can smoothly enter the diversion channel 510, the diversion channel 510 guides the immersion liquid so that the immersion liquid can smoothly flow towards the liquid inlet, meanwhile, as the separation plate 500 is arranged on two adjacent electric cores 210, when the immersion liquid flows along the diversion channel 510, heat exchange can be performed between the immersion liquid and the electric cores 210, so as to achieve the purpose of cooling or heating the electric cores 210 by using the immersion liquid.

Optionally, the partition plate 500 is formed as a heat-conductive elastic member to ensure that the immersion liquid in the flow guiding channel 510 can smoothly exchange heat with the electric core 210, and meanwhile, the elastic member can absorb the deformation of the electric core 210, that is, ensure that the electric core 210 can smoothly expand and deform, so that the partition plate 500 is prevented from extruding the electric core 210, and the service life of the electric core 210 is prolonged.

Alternatively, as shown in fig. 5, a plurality of second communication ports 520 are formed on two opposite sides of the partition plate 500 in the second direction, a plurality of flow guiding channels 510 are formed in the partition plate 500, the plurality of flow guiding channels 510 are sequentially arranged along the third direction, two adjacent flow guiding channels 510 are communicated through the second communication ports 520, and the third direction, the second direction and the first direction are mutually perpendicular. The third direction is understood as the up-down direction shown in fig. 1, that is, the plurality of diversion channels 510 are sequentially arranged along the up-down direction of the battery pack 1000, and two adjacent diversion channels 510 are communicated through the second communication opening 520, so that when the immersion liquid enters one of the diversion channels 510, the immersion liquid can be filled into the plurality of diversion channels 510, and at this time, the immersion liquid in the plurality of diversion channels 510 cooperates to cool or heat the different positions of the battery cells 210 in the up-down direction, so as to improve the heat exchange effect.

It may be understood that, by forming a plurality of diversion channels 510 sequentially arranged along the third direction in the partition plate 500 and communicating two adjacent diversion channels 510 through the second communication opening 520, the contact area between the immersion liquid and the electric core 210 may be increased, so as to further improve the effect of immersion cooling or immersion heating.

Optionally, as shown in fig. 8 and 9, a second separation beam 150 is disposed in the first receiving area 131, the second separation beam 150 extends along the second direction, and the second separation beam 150 is adapted to separate a plurality of cell receiving areas 1311 in the first receiving area 131, and each cell receiving area 1311 is adapted to receive a set of cell assemblies 200. The second separation beam 150 is used for separating the plurality of groups of battery cell assemblies 200, so as to avoid short circuit caused by contact of the plurality of groups of battery cell assemblies 200, and ensure the use safety of the battery pack 1000.

Meanwhile, the second separation beam 150 can also limit the positions of the battery cell assemblies 200, so as to ensure that the positions of the plurality of groups of battery cell assemblies 200 in the battery pack 1000 are stable.

Optionally, a third communication port is provided on the second partition beam 150 to communicate with two adjacent cell receiving areas 1311. On one hand, the immersion liquid entering the accommodating cavity 130 can smoothly flow towards the liquid inlet, so that the circulation flow of the immersion liquid is realized, and the heat exchange effect of the immersion liquid is ensured; on the other hand, it is ensured that the immersion liquid entering the accommodating cavity 130 can smoothly flow into the plurality of cell accommodating areas 1311, that is, the immersion liquid entering the accommodating cavity 130 can effectively perform immersion cooling or immersion heating on the plurality of groups of cell assemblies 200, so that the plurality of groups of cell assemblies 200 in the battery pack 1000 can be kept in a proper temperature range.

The power device according to the embodiment of the present utility model includes 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 device according to the embodiment of the present utility model, by adopting the battery pack 1000, can simplify the structure of the power device, reduce the production cost of the power device, and improve the space utilization of the power device while ensuring the safety of the power device.

The power unit of the present application may be an electric drive unit such as an electric vehicle, an aircraft, or a ship.

In some examples, a mounting plate is disposed on the outer side of the side rail 120 of the battery pack 1000, and a plurality of mounting holes are formed in the mounting plate, and the battery pack 1000 is fixedly connected in the vehicle by fasteners penetrating the mounting holes, so that the battery pack 1000 is stable relative to the vehicle.

Optionally, the fastener is a bolt, and the bolt passes through a mounting hole on the battery pack 1000 to be fixedly connected on the vehicle, so as to realize the fixed connection between the battery pack 1000 and the vehicle, thereby realizing the fixed battery pack 1000.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery pack, comprising:

-a housing (100), said housing (100) comprising a bottom plate (110) and a side rail (120) connected to said bottom plate (110), said side rail (120) and said bottom plate (110) cooperating to form an upwardly open receiving cavity (130) within said housing (100);

the battery cell assembly (200), the said battery cell assembly (200) locates the said holding cavity (130);

the side beam (120) is internally provided with a runner (125) for circulating immersion liquid, the side beam (120) is provided with a first communication port (126), and the first communication port (126) is communicated with the runner (125) and the accommodating cavity (130).

2. The battery pack according to claim 1, wherein the side beam (120) includes a first side beam (121) and a second side beam (122) that are disposed opposite to each other in a first direction, the first communication port (126) includes a liquid inlet and a liquid outlet (1262), one of the first side beam (121) and the second side beam (122) is provided with the liquid inlet, the other side beam is provided with the liquid outlet (1262), and both the liquid inlet and the liquid outlet (1262) are communicated with the accommodating chamber (130) and the circulation.

3. The battery pack according to claim 2, wherein a side of the first side beam (121) facing the accommodating chamber (130) is provided with a plurality of the liquid outlets (1262) arranged at intervals along a second direction, and a side of the second side beam (122) facing the accommodating chamber (130) is provided with a plurality of the liquid inlets arranged at intervals along the second direction, the second direction being perpendicular to the first direction.

4. A battery pack according to claim 3, further comprising a circulation pump (300), wherein the circulation pump (300) is provided at a liquid inlet end of the first side beam (121) for driving the immersion liquid to circulate between the flow passage (125) and the accommodating chamber (130);

wherein, the opening area of a plurality of liquid outlets (1262) gradually decreases towards the direction close to the liquid inlet end.

5. The battery pack according to claim 2, wherein a first separation beam (140) extending along the first direction is arranged in the accommodating cavity (130), the first separation beam (140) is used for dividing the accommodating cavity (130) into a first accommodating area (131) and a second accommodating area (132), the first accommodating area (131) is suitable for accommodating the battery cell assembly (200), the second accommodating area (132) is suitable for accommodating the battery management module (400), and the liquid inlet and the liquid outlet (1262) are opposite to the first accommodating area (131).

6. The battery pack according to claim 2, wherein the cell assembly (200) includes a plurality of cells (210) arranged at intervals along the second direction, the length direction of the cells (210) extends along the first direction, and two adjacent cells (210) are arranged at intervals to form an avoidance channel between two adjacent cells (210).

7. The battery pack according to claim 6, wherein a partition plate (500) is disposed in the avoidance channel, a diversion channel (510) extending along the first direction is formed in the partition plate (500), and opposite ends of the diversion channel (510) are respectively communicated with the liquid inlet and the liquid outlet (1262).

8. The battery pack according to claim 7, wherein the separator (500) is provided with a plurality of second communication ports (520) at opposite sides of the second direction, a plurality of flow guide channels (510) are formed in the separator (500) to be sequentially arranged in a third direction, adjacent two of the flow guide channels (510) are communicated through the second communication ports (520), and the third direction, the second direction and the first direction are perpendicular to each other.

9. The battery pack according to claim 5, wherein a second dividing beam (150) extending in a second direction is provided in the first receiving area (131), the second dividing beam (150) being adapted to divide a plurality of cell receiving areas (1311) in the first receiving area (131), each cell receiving area (1311) being adapted to receive a set of the cell assemblies (200);

and a third communication port for communicating two adjacent cell accommodating areas (1311) is formed in the second separation beam (150).

10. A power plant comprising a battery pack according to any one of claims 1-9.