CN220604786U - Cooling system, battery pack box and battery pack - Google Patents

Abstract

The utility model discloses a cooling system, a battery pack box body and a battery pack, and belongs to the technical field of batteries. According to the utility model, the beam liquid inlet channel and the beam liquid return channel are arranged in the beam in the cooling system, so that the beam can fix the battery cell and can be used as a circulation channel of cooling liquid. After flowing in from the main liquid inlet, the cooling liquid in the side liquid cooling plate is conducted through the liquid cooling plate flow channel layer and the cross beam and then enters, so that the use of the pipeline to connect the side liquid cooling plate is avoided, the design of no pipeline in the box body is realized, the space is saved, and the volume utilization rate of the space in the box body is improved. The side liquid cooling plates can cool two end faces of the battery cell, three-face cooling of the battery cell is achieved through the liquid cooling plates at the bottom of the box body and the side liquid cooling plates, cooling efficiency of the battery is improved, and the battery cooling can meet requirements of high-power charge and discharge.

Description

Cooling system, battery pack box and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a cooling system, a battery pack box body and a battery pack.

Background

With the development of society, automobile travel becomes more and more people's choice under the state of fast-paced life, but in global petroleum resource shortage and the continuous worsening of climatic environment make modern human society's development face serious challenges, the development energy saving and the new energy automobile of no waste emission have received the high attention of each country, the effort of searching for alternative travel energy and travel mode to the energy problem, expand on a large scale under huge market prospect, new energy automobile market development is rapid from this, power battery system is as the power source of new energy automobile, its safe and reliable whole system is vital. Along with the traveling demands of people and the use convenience of new energy automobiles, the requirements of new energy electric car users on the endurance mileage are higher and higher, and the energy density of the battery system is improved to be the development trend of the battery system.

In order to improve the endurance mileage of the electric car and improve the energy density of the battery, a non-module battery system, for example, a non-module battery system disclosed in chinese patent CN114665177a, is adopted, and compared with a conventional module battery system, the space utilization of the system is greatly improved, so that the energy density of the whole battery system is obviously improved.

On the other hand, the improvement of the endurance mileage is achieved, and in terms of the convenience of use, people pursue the rapidness of battery charging at the same time. Battery suppliers and whole car manufacturers are more prone to develop super fast charging technology and shorten charging time, but high-rate charging means that the heating value of a battery cell in unit time rises exponentially, the charging rate can be limited in reverse by the fact that the temperature of the battery cell rises rapidly in a short time, the battery cell is mainly cooled in a bottom liquid cooling plate mode in the current battery pack thermal management design, the battery cell is limited by the power of a compressor and the contact area between the liquid cooling plate and the battery cell, the cooling mode has limited cooling efficiency, and the heating value of the battery cell is extremely large in a high-rate fast charging state, so that the cooling requirement is difficult to reach.

Chinese patent CN114725566a discloses a liquid cooling battery pack, although the liquid cooling plates are added to two sides of the battery, more pipelines are also arranged to connect the liquid cooling plates, thereby occupying space in the battery pack and affecting energy density of the battery. However, in this scheme, the battery cell lacks the crossbeam to fix, and the intensity of battery package is weaker.

Therefore, how to provide a battery pack capable of satisfying the cooling requirement of the battery under fast charging, reducing the occupation space of the liquid cooling system, and improving the strength of the battery pack is a problem to be solved.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model provides a cooling system, a battery pack box body and a battery pack, wherein a battery core is fixed through a cross beam, so that the strength of the battery pack is improved; the cooling liquid flow channel is arranged in the cross beam, the cooling liquid is conveyed to the side liquid cooling plate through the cross beam, and the arrangement of a pipeline in the battery pack for conveying the cooling liquid is avoided, so that the space utilization rate in the battery pack is improved, and the cooling area of the battery is increased.

2. Technical proposal

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

the cooling system comprises a liquid cooling plate, a cross beam positioned on the liquid cooling plate and a plurality of side liquid cooling plates, wherein the side liquid cooling plates are arranged at intervals; a beam liquid inlet channel and a beam liquid return channel are arranged in the beam along the extending direction of the beam; the inlet of the beam liquid inlet runner is communicated with the liquid cooling runner in the liquid cooling plate, and the outlet of the beam liquid inlet runner is communicated with the side liquid cooling plate inner runner; and the inlet of the beam liquid return runner is communicated with the side liquid cooling plate inner runner, and the outlet of the beam liquid return runner is communicated with the liquid cooling runner in the liquid cooling plate.

Further, the inlet of the beam liquid inlet channel is a beam total liquid inlet positioned at one side of the beam liquid inlet channel, a plurality of outlets are arranged, and the inlets are respectively beam liquid separation liquid outlets positioned at the other side of the beam liquid inlet channel; the outlet of the beam liquid return channel is a beam main liquid outlet positioned at one side of the beam liquid return channel, a plurality of inlets are arranged, and the inlets are respectively beam liquid separating and collecting ports positioned at the other side of the beam liquid return channel; the liquid cooling plate is provided with a liquid inlet and liquid outlet, the liquid inlet and liquid outlet are communicated with the beam main liquid inlet, and the liquid outlet and liquid outlet are communicated with the beam main liquid outlet; the side liquid cooling plate liquid inlet and the side liquid cooling plate liquid outlet are arranged at one end of the side liquid cooling plate, the side liquid cooling plate liquid inlet is communicated with a beam liquid separating outlet, and the side liquid cooling plate liquid outlet is communicated with a beam liquid separating and collecting outlet.

Further, the crossbeam includes crossbeam upper plate, crossbeam medium plate and crossbeam hypoplastron that side by side interval set up, crossbeam inlet channel and crossbeam return flow way are located between crossbeam upper plate and the crossbeam medium plate, set up at least one baffle between crossbeam inlet channel and the crossbeam return flow way.

Further, the two ends of the cross beam are provided with cross beam plugs, and the cross beam plugs are plugged at the two ends of the cross beam liquid inlet flow channel and the cross beam liquid return flow channel.

Further, the beam total liquid inlet and the beam total liquid outlet are all arranged on the beam middle plate, and the beam liquid separating liquid outlet and the beam liquid separating liquid collecting opening are both arranged on the beam upper plate.

Further, the beam main liquid inlet is connected with a beam liquid inlet nozzle, and the beam liquid inlet nozzle penetrates through a beam lower plate to be connected with a liquid inlet and liquid separation port; the beam main liquid outlet is connected with a beam liquid outlet nozzle, and the beam liquid outlet nozzle penetrates through a beam lower plate to be connected with a liquid outlet and liquid collecting port.

Further, the liquid cooling plate comprises a liquid cooling plate runner layer, a liquid cooling runner, a total liquid inlet and a total liquid outlet are arranged in the liquid cooling plate runner layer and communicated with the liquid cooling runner, the liquid inlet is communicated with the total liquid inlet through the liquid cooling runner, and the liquid outlet is communicated with the total liquid outlet through the liquid cooling runner.

Further, a side liquid cooling plate liquid inlet flow channel and a side liquid cooling plate liquid return flow channel, wherein one end of the side liquid cooling plate liquid inlet flow channel is communicated with the side liquid cooling plate liquid inlet, and the side liquid cooling plate liquid return flow channel is communicated with the side liquid cooling plate liquid outlet.

Further, one end of the side liquid cooling plate is provided with a side liquid cooling plate left end plate and a side liquid cooling plate right end plate which are bonded together, and the side liquid cooling plate liquid inlet flow channel and the side liquid cooling plate liquid return flow channel extend to between the side liquid cooling plate left end plate and the side liquid cooling plate right end plate; the liquid inlet of the side liquid cooling plate and the liquid outlet of the side liquid cooling plate are arranged between the left end plate of the side liquid cooling plate and the right end plate of the side liquid cooling plate.

Further, a flange plate is arranged between the side liquid cooling plate and the cross beam, and a liquid inlet nozzle of the side liquid cooling plate and a liquid outlet nozzle of the side liquid cooling plate are arranged on the flange plate; the liquid inlet of the side liquid cooling plate penetrates through the flange plate, one end of the liquid inlet of the side liquid cooling plate is connected with the liquid inlet of the side liquid cooling plate, and the other end of the liquid inlet of the side liquid cooling plate is connected with the liquid outlet of the beam liquid separation plate; the liquid outlet nozzle of the side liquid cooling plate penetrates through the flange plate, one end of the liquid outlet nozzle of the side liquid cooling plate is connected with the liquid outlet port of the side liquid cooling plate, and the other end of the liquid outlet nozzle of the side liquid cooling plate is connected with the liquid distributing and collecting port of the cross beam.

Further, a sealing gasket is arranged between the flange plate and the cross beam.

The utility model also provides a battery pack box body, which comprises a box body and the cooling system, wherein the liquid cooling plate is positioned at the bottom of the box body.

The utility model also provides a battery pack, which comprises the battery pack box body and the battery core, wherein the large surfaces of the battery core are mutually close to each other and are stacked between the adjacent side liquid cooling plates, and the cross beam is used for extruding and fixing the battery core.

3. Advantageous effects

Compared with the prior art, the technical scheme provided by the utility model has the following beneficial effects: the beam liquid inlet channel and the beam liquid return channel are arranged in the beam, so that the beam not only can fix the battery cell, but also can be used as a circulation channel of cooling liquid. After flowing in from the main liquid inlet, the cooling liquid in the side liquid cooling plate is conducted through the liquid cooling plate flow channel layer and the cross beam and then enters, so that the use of the pipeline to connect the side liquid cooling plate is avoided, the design of no pipeline in the box body is realized, the space is saved, and the volume utilization rate of the space in the box body is improved. The side liquid cooling plates can cool two end faces of the battery cell, three-face cooling of the battery cell is achieved through the liquid cooling plates at the bottom of the box body and the side liquid cooling plates, cooling efficiency of the battery is improved, and the battery cooling can meet requirements of high-power charge and discharge.

Drawings

FIG. 1 is a schematic diagram of a battery pack;

FIG. 2 is a schematic view of the interior of a battery pack case;

FIG. 3 is a schematic diagram of the connection of the side liquid cooling plates to the cross beam;

FIG. 4 is a schematic diagram of the connection of the side liquid cooling plates and the cross beam structure;

FIG. 5 is a schematic view of the liquid inlet direction of the cross beam;

FIG. 6 is a schematic view of the beam liquid outlet direction;

FIG. 7 is a schematic diagram of a side liquid cooling plate structure;

FIG. 8 is a schematic view of a flow channel layer of a liquid cooling plate.

Reference numerals in the schematic drawings illustrate:

1. a case; 2. a battery cell; 3. an aerogel layer;

4. a liquid cooling plate flow channel layer; 40. a total liquid inlet; 41. a total liquid outlet; 401. a liquid inlet and a liquid outlet; 402. a liquid outlet and liquid collecting port;

5. a liquid cooling plate upper plate;

6. a liquid cooling plate total joint; 60. a total liquid inlet joint; 61. a total liquid outlet joint;

7. a side liquid cooling plate; 70. a liquid inlet nozzle of the side liquid cooling plate; 71. a liquid outlet nozzle of the side liquid cooling plate; 73. a liquid inlet flow passage of the side liquid cooling plate; 74. a side liquid cooling plate liquid return channel; 75. a side liquid cooling plate plug; 76. a left end plate of the side liquid cooling plate; 77. a right end plate of the side liquid cooling plate;

10. a cross beam; 101. a cross beam upper plate; 1010. welding a nut; 102. a beam middle plate; 103. a cross beam lower plate; 104. a beam liquid inlet flow passage; 105. a beam return flow path; 106. a cross beam liquid inlet nozzle; 107. a cross beam plug; 108. a cross beam liquid outlet nozzle; 111. a flange plate; 112. a sealing gasket; 113. and (5) fastening a bolt.

Detailed Description

The present utility model will be described in detail below with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present utility model, and other ways of implementing the utility model will occur to those skilled in the art on the basis of the preferred embodiment, and are within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated in terms of "horizontal", "vertical", "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

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 either fixedly connected, detachably connected, or integrally connected, for example; the electric connection can be realized by mechanical connection or electric connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. 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.

Example 1

This embodiment provides a cooling system, as shown in fig. 2, including the liquid cooling board, be located the crossbeam 10 and a plurality of side liquid cooling board 7 on the liquid cooling board, side liquid cooling board 7 interval sets up, and the interval of side liquid cooling board 7 is unanimous. The crossbeam 10 sets up along the width direction of liquid cooling board, and the side liquid cooling board 7 sets up along the length direction of liquid cooling board, and side liquid cooling board 7 all is located the same side of crossbeam 10, and the extending direction of side liquid cooling board 7 is perpendicular with the extending direction of crossbeam 10, and the plane that side liquid cooling board 7 is located is perpendicular with the liquid cooling board, sets up the liquid cooling runner in the liquid cooling board, also sets up the runner that is used for circulating the coolant liquid in the side liquid cooling board 7.

Specifically, a beam liquid inlet passage 104 and a beam liquid return passage 105 are provided in the beam 10 along the extending direction thereof. The inlet of the beam liquid inlet runner 104 is communicated with the liquid cooling runner in the liquid cooling plate, and the outlet is communicated with the runner in the side liquid cooling plate 7. The inlet of the beam liquid return channel 105 is communicated with the inner channel of the side liquid cooling plate 7, and the outlet is communicated with the inner liquid cooling channel of the liquid cooling plate.

In this embodiment, the inlet of the beam liquid inlet channel 104 is a beam total liquid inlet located at one side of the beam liquid inlet channel 104, and the outlets are multiple and are beam liquid separating outlets located at the other side of the beam liquid inlet channel 104. The outlet of the beam liquid return channel 105 is a beam total liquid outlet positioned at one side of the beam liquid return channel 105, a plurality of inlets are arranged, and the inlets are beam liquid separating and collecting ports positioned at the other side of the beam liquid return channel 105 respectively. The liquid cooling plate is provided with a liquid inlet and liquid outlet 401 and a liquid outlet and liquid collecting port 402, the liquid inlet and liquid outlet 401 is communicated with the total liquid inlet of the cross beam, and the liquid outlet and liquid collecting port 402 is communicated with the total liquid outlet of the cross beam. The side liquid cooling plate 7 is provided with a side liquid cooling plate liquid inlet and a side liquid cooling plate liquid outlet at one end, the side liquid cooling plate liquid inlet is communicated with a beam liquid separating outlet, and the side liquid cooling plate liquid outlet is communicated with a beam liquid separating and collecting outlet. The number of the beam liquid-separating liquid outlets and the beam liquid-separating liquid-collecting outlets is related to the number of the side liquid-cooling plates 7 connected to the beam 10, and in this embodiment, the number of the side liquid-cooling plates 7 is five, so that the beam liquid-separating liquid-outlet and the beam liquid-separating liquid-collecting outlets are respectively five. Of course, the beam liquid separating outlet and the beam liquid separating and collecting outlet can be set to other numbers according to the number of the side liquid cooling plates 7.

As shown in fig. 4, 5 and 6, in the present embodiment, the beam 10 includes a beam upper plate 101, a beam middle plate 102 and a beam lower plate 103 that are arranged side by side at intervals, the beam middle plate 102 is located between the beam upper plate 101 and the beam lower plate 103, and side plates are further arranged on both sides of the beam upper plate 101, the beam middle plate 102 and the beam lower plate 103 and form the beam 10 together. The beam liquid inlet channel 104 and the beam liquid return channel 105 are positioned between the beam upper plate 101 and the beam middle plate 102, and a partition plate is arranged between the beam liquid inlet channel 104 and the beam liquid return channel 105. In this embodiment, two beam liquid inlet channels 104 and two beam liquid return channels 105 are provided, and the beam liquid inlet channels 104 and the beam liquid return channels 105 are not communicated in the beam 10 by using the partition plates, so that independent liquid inlet and return channels are formed in the beam 10 by the beam liquid inlet channels 104 and the beam liquid return channels 105, and the two beam liquid inlet channels 104 and the beam liquid return channels 105 are separated from each other to play a role of heat insulation. The beam 10 is provided with three plates of a beam upper plate 101, a beam middle plate 102 and a beam lower plate 103 for forming an internal beam inflow channel 104 and a beam return channel 105 on the one hand and for reinforcing the beam on the other hand.

The two ends of the beam 10 are provided with beam plugs 107, and the beam plugs 107 are plugged at the two ends of the beam liquid inlet channel 104 and the beam liquid return channel 105, so that overflow and leakage of cooling liquid are avoided.

The beam total liquid inlet and the beam total liquid outlet in the embodiment are both arranged on the beam middle plate 102, and the beam liquid separating liquid outlet and the beam liquid separating liquid collecting opening are both arranged on the beam upper plate 101. The beam main liquid inlet is connected with a beam liquid inlet nozzle 106, and the beam liquid inlet nozzle 106 penetrates through the beam lower plate 103 to be connected with a liquid inlet liquid separation port 401; the beam main liquid outlet is connected with the beam liquid outlet 108, and the beam liquid outlet 108 passes through the beam lower plate 103 and is connected with the liquid outlet and liquid collecting port 402. In some cases, in order to realize quick connection, metal quick connectors are installed at the liquid inlet and outlet ports 401 and 402, and the beam liquid inlet nozzle 106 and the beam liquid outlet nozzle 108 can be respectively and quickly connected with the liquid inlet and outlet ports 401 and 402 through the metal quick connectors.

In this embodiment, the beam liquid inlet channel 104 and the beam liquid return channel 105 are disposed in the beam 10, so that the beam 10 not only can fix the battery cell, but also can be used as a circulation channel of the cooling liquid, so that the beam 10 replaces a pipeline, and the occupied space of the pipeline is reduced, thereby saving space.

As shown in fig. 8, the liquid cooling plate includes a liquid cooling plate runner layer 4, a liquid cooling plate upper plate 5 and a liquid cooling plate lower plate, the liquid cooling plate runner layer 4 is located between the liquid cooling plate upper plate 5 and the liquid cooling plate lower plate, and the three can be adhered and fixed through an adhesive layer, or can be fixed through other modes. The liquid cooling plate runner layer 4 is internally provided with a liquid cooling runner, a total liquid inlet 40 and a total liquid outlet 41 which are communicated with the liquid cooling runner, the liquid inlet and liquid outlet 401 is communicated with the total liquid inlet 40 through the liquid cooling runner, and the liquid outlet and liquid collecting port 402 is communicated with the total liquid outlet 41 through the liquid cooling runner. The total liquid inlet 40 and the total liquid outlet 41 extend to the outer side of the box body 1, and a liquid cooling plate total joint 6 is arranged. The liquid cooling plate total joint 6 comprises a total liquid inlet joint 60 and a total liquid outlet joint 61, wherein the total liquid inlet joint 60 is connected with the total liquid inlet 40, the total liquid outlet joint 61 is connected with the total liquid outlet 41, and the liquid cooling plate total joint 6 is connected with a cooling liquid pipeline, so that convenience is high. And the liquid cooling plate total joint 6 is arranged on the outer side of the box body 1, so that the space in the box body is further saved.

As shown in fig. 3 to 7, a side liquid cooling plate liquid inlet and a side liquid cooling plate liquid outlet are formed in one end of each side liquid cooling plate 7, the side liquid cooling plate liquid inlet of each side liquid cooling plate 7 is communicated with a beam liquid separating outlet, and the side liquid cooling plate liquid outlet is communicated with a beam liquid separating and collecting outlet.

The side liquid cooling plate 7 inner flow path comprises a side liquid cooling plate liquid inlet flow path 73 and a side liquid cooling plate liquid return flow path 74, one ends of the side liquid cooling plate liquid inlet flow path 73 and the side liquid cooling plate liquid return flow path 74 are communicated, the other end of the side liquid cooling plate liquid inlet flow path 73 is communicated with a side liquid cooling plate liquid inlet, and the other end of the side liquid cooling plate liquid return flow path 74 is communicated with a side liquid cooling plate liquid outlet. The side liquid cooling plate liquid inlet flow channel 73 and the side liquid cooling plate liquid return flow channel 74 extend to two ends of the side liquid cooling plate 7, and one end of the side liquid cooling plate 7, which is far away from the side liquid cooling plate liquid inlet and the side liquid cooling plate liquid outlet, is provided with the side liquid cooling plate plug 75, so that overflow and leakage of cooling liquid are avoided.

One end of the side liquid cooling plate 7 is provided with a side liquid cooling plate left end plate 76 and a side liquid cooling plate right end plate 77 which are attached together, and the side liquid cooling plate liquid inlet channel 73 and the side liquid cooling plate liquid return channel 74 extend to between the side liquid cooling plate left end plate 76 and the side liquid cooling plate right end plate 77, and a side liquid cooling plate liquid inlet and a side liquid cooling plate liquid outlet are formed between the side liquid cooling plate left end plate 76 and the side liquid cooling plate right end plate 77.

In order to realize the communication between the side liquid cooling plate 7 and the cross beam 10, a flange plate 111 is arranged between the side liquid cooling plate 7 and the cross beam 10, and a side liquid cooling plate liquid inlet 70 and a side liquid cooling plate liquid outlet 71 are fixedly arranged on the flange plate 111. Specifically, the liquid inlet 70 of the side liquid cooling plate penetrates through the flange plate 111, one end of the liquid inlet is connected with the liquid inlet of the side liquid cooling plate, and the other end of the liquid inlet is connected with the liquid outlet of the beam liquid separation; the liquid outlet 71 of the side liquid cooling plate penetrates through the flange plate 111, one end of the liquid outlet 71 of the side liquid cooling plate is connected with the liquid outlet of the side liquid cooling plate, and the other end of the liquid outlet 71 of the side liquid cooling plate is connected with the liquid distributing and collecting port of the cross beam. The flange 111 is mounted and fixed on the beam 10, and specifically the flange 111 is disposed on the beam upper plate 101. A connecting hole is formed in the beam upper plate 101 near each beam liquid separating outlet or beam liquid separating and collecting outlet, a welding nut 1010 is arranged on one side of the connecting hole, and the flange plate 111 is arranged on the beam upper plate 101 by penetrating the flange plate 111 and the beam upper plate 101 through a fastening bolt 113 to be matched and connected with the welding nut 1010. A sealing gasket 112 is further arranged between the flange 111 and the beam 10, and the sealing gasket 112 can seal between the flange 111 and the beam 10 to avoid leakage of cooling liquid.

In this embodiment, the liquid cooling channels in the liquid cooling plate channel layer 4 extend from the total liquid inlet 40, pass through the liquid inlet 401, continue to extend and split into a plurality of cooling areas, each cooling area is located between two adjacent liquid cooling plates 7, and the liquid cooling channels in the cooling areas continue to extend along the side liquid cooling plates 7, then merge and extend to the liquid outlet 402, and finally extend to the total liquid outlet 41. The liquid inlet and outlet ports 401 and 402 are located on two sides of the liquid cooling plate runner layer 4, so that the beam total liquid inlet and beam total liquid outlet are located on two ends of the beam 10.

The cooling liquid enters from the total liquid inlet 40, flows to the liquid inlet separating opening 401 through the liquid cooling flow channel, part of the cooling liquid flows back to the liquid outlet collecting opening 402 after being shunted into the cooling area of the liquid cooling flow channel, the other part of the cooling liquid flows into the beam liquid inlet flow channel 104 through the beam liquid inlet nozzle 106, is shunted in the beam liquid inlet flow channel 104 through each beam liquid separating opening, enters the side liquid cooling plate liquid inlet flow channel 73 through the side liquid cooling plate liquid inlet nozzle 70 and flows to the side liquid cooling plate liquid return flow channel 74, flows out of the side liquid cooling plate 7 from the side liquid cooling plate liquid outlet nozzle 71 and flows into the beam liquid return flow channel 105 from the beam liquid separating collecting opening, flows to the liquid outlet collecting opening 402 through the beam liquid outlet nozzle 108 after being converged by the beam liquid return flow channel 105, and flows out from the liquid cooling flow channel to the total liquid outlet 41 after being converged with the cooling area.

In this embodiment, after flowing in from the total liquid inlet 40, the cooling liquid in the side liquid cooling plate 7 is conducted through the liquid cooling plate runner layer 4 and the cross beam 10 and then enters, so that the use of the pipeline to connect the side liquid cooling plate 7 is avoided, the design of no pipeline in the box body 1 is realized, the space is saved, and the volume utilization rate of the space in the box body is improved.

Example 2

The present embodiment provides a battery pack case, as shown in fig. 1 and 2, comprising a case 1 and the cooling system of embodiment 1, wherein the liquid cooling plate is located at the bottom of the case 1. The box 1 includes the bottom plate and is located the box curb plate around the bottom plate, and total inlet 40 and total liquid outlet 41 extend to the outside of box curb plate, realize setting up the liquid cooling board total joint 6 in the outside of box 1, have further saved the box inner space.

Example 3

The embodiment provides a battery pack, as shown in fig. 1, including a battery pack case and a battery cell 2 in embodiment 2, where the battery cell 2 is in a cuboid shape, and the surface with the largest area is the large surface of the battery cell 2. The large faces of the battery cells 2 are close to each other and are stacked between the adjacent side liquid cooling plates 7, the cross beam 10 is used for extruding and fixing the battery cells 2, and the overall strength of the battery pack can be improved through the fixation of the cross beam 10.

When the cells 2 are arranged in this embodiment, the large faces of each cell are close to each other, and the end face with the smallest area abuts against the side liquid cooling plate 7. An aerogel layer 3 is arranged between the large surfaces of two adjacent electric cores 2 and is used for heat insulation between the electric cores. For better cooling of the bottom surface and the end surface of the battery cell 2, a heat conducting adhesive layer is arranged on one side of the liquid cooling plate, which is close to the battery, and on the side surface of the side liquid cooling plate 7, which is in contact with the battery cell, so that better transmission of cold liquid cooling capacity can be realized.

In this embodiment, the battery cell 2 is located on a liquid cooling plate, and the liquid cooling plate can cool the bottom surface of the battery cell 2, and the side close to the bottom of the box 1 is the bottom surface of the battery cell 2. The side liquid cooling plates 7 can cool two end faces of the battery cell 2, three-face cooling of the battery cell 2 is achieved through the liquid cooling plates at the bottom of the box body and the side liquid cooling plates 7, cooling efficiency of the battery is improved, and the battery cooling can meet requirements of high-power charge and discharge. Meanwhile, the liquid cooling flow channel in the cross beam 10 and the liquid cooling plate is used for conveying cooling liquid to the side liquid cooling plate 7, so that the design of no pipeline in the battery pack is realized, and the volume utilization rate of the space in the box body is improved.

The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.

Claims (13)

1. The cooling system is characterized by comprising a liquid cooling plate, a cross beam (10) positioned on the liquid cooling plate and a plurality of side liquid cooling plates (7), wherein the side liquid cooling plates (7) are arranged at intervals; a beam liquid inlet channel (104) and a beam liquid return channel (105) are arranged in the beam (10) along the extending direction of the beam; the inlet of the beam liquid inlet runner (104) is communicated with the liquid cooling runner in the liquid cooling plate, and the outlet is communicated with the inner runner of the side liquid cooling plate (7); the inlet of the beam liquid return channel (105) is communicated with the inner channel of the side liquid cooling plate (7), and the outlet is communicated with the inner liquid cooling channel of the liquid cooling plate.

2. The cooling system of claim 1, wherein: the inlet of the beam liquid inlet channel (104) is a beam total liquid inlet positioned at one side of the beam liquid inlet channel (104), a plurality of outlets are arranged, and the inlets are respectively beam liquid separation liquid outlets positioned at the other side of the beam liquid inlet channel (104); the outlet of the beam liquid return channel (105) is a beam total liquid outlet positioned at one side of the beam liquid return channel (105), a plurality of inlets are arranged, and the inlets are respectively beam liquid separating and collecting ports positioned at the other side of the beam liquid return channel (105);

the liquid cooling plate is provided with a liquid inlet and liquid outlet (401) and a liquid outlet and liquid converging port (402), the liquid inlet and liquid outlet (401) is communicated with the total liquid inlet of the cross beam, and the liquid outlet and liquid converging port (402) is communicated with the total liquid outlet of the cross beam; the side liquid cooling plate is characterized in that a side liquid cooling plate liquid inlet and a side liquid cooling plate liquid outlet are formed in one end of the side liquid cooling plate (7), the side liquid cooling plate liquid inlet is communicated with a beam liquid separating liquid outlet, and the side liquid cooling plate liquid outlet is communicated with a beam liquid separating liquid collecting opening.

3. The cooling system of claim 2, wherein: the beam (10) comprises a beam upper plate (101), a beam middle plate (102) and a beam lower plate (103) which are arranged at intervals side by side, a beam liquid inlet channel (104) and a beam liquid return channel (105) are positioned between the beam upper plate (101) and the beam middle plate (102), and at least one partition plate is arranged between the beam liquid inlet channel (104) and the beam liquid return channel (105).

4. The cooling system of claim 2, wherein: the two ends of the cross beam (10) are provided with cross beam plugs (107), and the cross beam plugs (107) are plugged at the two ends of the cross beam liquid inlet flow channel (104) and the cross beam liquid return flow channel (105).

5. A cooling system according to claim 3, characterized in that: the beam total liquid inlet and the beam total liquid outlet are both arranged on the beam middle plate (102), and the beam liquid separating liquid outlet and the beam liquid separating liquid collecting outlet are both arranged on the beam upper plate (101).

6. The cooling system of claim 5, wherein: the beam total liquid inlet is connected with a beam liquid inlet nozzle (106), and the beam liquid inlet nozzle (106) penetrates through a beam lower plate (103) to be connected with a liquid inlet liquid separation port (401); the beam main liquid outlet is connected with a beam liquid outlet nozzle (108), and the beam liquid outlet nozzle (108) penetrates through a beam lower plate (103) and is connected with a liquid outlet and liquid collecting port (402).

7. The cooling system according to any one of claims 2-6, wherein: the liquid cooling plate comprises a liquid cooling plate flow channel layer (4), a liquid cooling flow channel, a total liquid inlet (40) and a total liquid outlet (41) are formed in the liquid cooling plate flow channel layer (4), the liquid inlet and the liquid outlet are communicated with each other, the liquid inlet and the liquid outlet are respectively communicated with each other through the liquid cooling flow channel and the liquid inlet (40), and the liquid outlet are respectively communicated with each other through the liquid cooling flow channel and the total liquid outlet (41).

8. The cooling system of claim 7, wherein: side liquid cooling board (7) are interior to set up side liquid cooling board feed liquor runner (73) and side liquid cooling board return flow runner (74) that one end was communicated, side liquid cooling board feed liquor runner (73) and side liquid cooling board inlet intercommunication, side liquid cooling board return flow runner (74) and side liquid cooling board liquid outlet intercommunication.

9. The cooling system of claim 8, wherein: one end of the side liquid cooling plate (7) is provided with a side liquid cooling plate left end plate (76) and a side liquid cooling plate right end plate (77) which are bonded together, and the side liquid cooling plate liquid inlet flow channel (73) and the side liquid cooling plate liquid return flow channel (74) extend to a position between the side liquid cooling plate left end plate (76) and the side liquid cooling plate right end plate (77); the liquid inlet of the side liquid cooling plate and the liquid outlet of the side liquid cooling plate are arranged between a left end plate (76) of the side liquid cooling plate and a right end plate (77) of the side liquid cooling plate.

10. The cooling system of claim 9, wherein: a flange (111) is arranged between the side liquid cooling plate (7) and the cross beam (10), and a side liquid cooling plate liquid inlet nozzle (70) and a side liquid cooling plate liquid outlet nozzle (71) are arranged on the flange (111); the liquid inlet of the side liquid cooling plate (70) penetrates through the flange plate (111), one end of the liquid inlet of the side liquid cooling plate is connected with the liquid inlet of the side liquid cooling plate, and the other end of the liquid inlet of the side liquid cooling plate is connected with the liquid outlet of the beam liquid separation plate; the liquid outlet nozzle (71) of the side liquid cooling plate penetrates through the flange plate (111), one end of the liquid outlet nozzle is connected with the liquid outlet of the side liquid cooling plate, and the other end of the liquid outlet nozzle is connected with the liquid distributing and collecting port of the cross beam.

11. The cooling system of claim 10, wherein: a sealing gasket (112) is arranged between the flange plate (111) and the cross beam (10).

12. A battery pack case, characterized in that: comprising a tank (1) and a cooling system according to any one of claims 1-11, said liquid cooling plate being located at the bottom of the tank (1).

13. A battery pack, characterized in that: the battery pack comprises a battery pack box body and a battery cell (2) as claimed in claim 12, wherein the large surfaces of the battery cell (2) are close to each other and are stacked between adjacent side liquid cooling plates (7), and the cross beam (10) is used for extruding and fixing the battery cell (2).