Battery cooling system

Abstract

The utility model discloses a battery cooling system, which relates to the technical field of battery thermal management, and comprises a shell, a plurality of battery units, a water inlet pipe, a water outlet pipe and an air blowing device, the shell is provided with a cavity and a plurality of mounting channels penetrating along a first direction, the cavity is positioned at the peripheral side of the mounting channels, and the air blowing device is positioned at the peripheral side of the mounting channels. The mounting channel and the mounting channel are arranged at intervals; the plurality of battery units are respectively mounted in the mounting channels; the water inlet pipe and the water outlet pipe are respectively communicated with the cavity, and the water inlet pipe is used for introducing a cooling medium; and at least one group of blowing devices are arranged, are positioned on one side of the shell and are arranged towards the shell. According to the technical scheme provided by the utility model, air cooling can be carried out when the temperature of the battery unit is relatively low, water cooling can also be carried out when the temperature is relatively high, and water cooling and air cooling can also be carried out when the temperature is relatively high, so that the cooling effect on the battery is improved, and the heat dissipation requirement of the battery is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery thermal management technical field, especially a kind of battery cooling system. BACKGROUND

[0002] Power battery is one of the key parts of pure electric vehicle. The temperature and internal temperature uniformity have great influence on its performance and life.

[0003] Battery generates a lot of heat in the process of charging and discharging, if not heat in time, it can cause fire and a series of serious consequences, in the process of cooling the battery, water cooling or air cooling is usually used to cool down, but single cooling method, the cooling effect is not very good, can not meet the heat dissipation demand of battery. UTILITARIAN CONTENT

[0004] The utility model discloses a kind of battery cooling systems, to improve the cooling effect of battery, meet the heat dissipation demand of battery.

[0005] To achieve the above object, the battery cooling system provided by the utility model includes a shell, a plurality of battery units, an inlet pipe, an outlet pipe and a blowing device, the shell has a cavity and a plurality of installation channels penetrating in a first direction, the cavity is located on the side of the installation channel, and is arranged separately from the installation channel;A plurality of battery units are respectively installed in the installation channel;Inlet pipe, outlet pipe, respectively with the cavity is communicated, the inlet pipe is used for cooling medium to enter;Blowing device is at least set a group, located in one side of the shell, and is arranged towards the shell.

[0006] In an embodiment, a plurality of installation channels are arranged separately in a second direction, the inlet pipe and the outlet pipe are installed in the shell, the inlet pipe is connected to one side of the shell in the second direction, and the outlet pipe is connected to the other side of the shell in the second direction.

[0007] In an embodiment, a plurality of gaps are formed between a plurality of installation channels, and the battery cooling system further includes a plurality of turbulence blocks, a plurality of turbulence blocks are respectively arranged in a plurality of gap intervals, and the turbulence blocks are arranged in a third direction with the installation channels.

[0008] In an embodiment, the turbulence block extends in the third direction, and in the second direction, two adjacent turbulence blocks are arranged in the third direction, and are respectively fixedly connected to two inner side walls opposite to the cavity in the third direction.

[0009] In an embodiment, the size of the turbulence block in the third direction is greater than or equal to half of the size of the cavity in the third direction.

[0010] In an embodiment, the profile of the installation channel as viewed in a plane perpendicular to the first direction is curved, and the battery cooling system further comprises a plurality of turbulence blocks, the turbulence blocks being arranged opposite to the installation channel in a third direction, and a surface of the turbulence blocks opposite to the installation channel being curved, wherein the shortest distance from any point on the curved surface to the installation channel is equal.

[0011] In an embodiment, the housing and the plurality of battery units form a battery module, and a plurality of battery modules are arranged in the third direction.

[0012] The battery cooling system comprises a box, and the plurality of battery modules are arranged in the box, wherein one side of the box in the second direction is provided with an air inlet, and the other side of the box in the second direction is provided with an air outlet.

[0013] The air blowing device is arranged at the air inlet.

[0014] In an embodiment, a plurality of air inlets and / or a plurality of air outlets are arranged, and the plurality of air inlets and / or the plurality of air outlets are arranged corresponding to the gaps between the plurality of battery modules, and the air blowing device is arranged at one of the air inlets.

[0015] In an embodiment, a plurality of positioning blocks are arranged in the box, and the plurality of positioning blocks limit the installation interval, so that the battery module is limited to be installed.

[0016] In an embodiment, the battery cooling system comprises:

[0017] A water pump is arranged at the water inlet pipe.

[0018] A temperature sensor is arranged at the installation channel.

[0019] A control device is electrically connected with the air blowing device, the water pump and the temperature sensor.

[0020] The technical scheme of the utility model can perform air cooling when the temperature of the battery unit is low, can perform water cooling when the temperature is high, and can perform air cooling and water cooling simultaneously when the temperature is higher, so that the cooling effect on the battery is improved to meet the demand of battery heat dissipation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative labor.

[0022] Figure 1 Structure diagram of one embodiment of the battery cooling system provided by the utility model;

[0023] Figure 2 Structure diagram of another embodiment of the battery cooling system provided by the utility model.

[0024] Explanation of reference numerals:

[0025] 100, battery cooling system; 1, battery module; 11, shell; 111, mounting channel; 12, battery unit; 2, water inlet pipe; 3, water outlet pipe; 4, blowing device; 5, spoiler; 6, box; 61, air inlet; 62, air outlet; 7, positioning block; 8, water pump.

[0026] The realization, functional features and advantages of the utility model will be further described in combination with embodiments and with reference to the drawings. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0028] It should be noted that if the embodiments of the utility model involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0029] In addition, if the embodiments of the utility model involve descriptions of "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, "and / or" or "and / or" appearing throughout the text means that the three parallel solutions are included, taking "A and / or B" as an example, including A solution, or B solution, or A and B solution. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skill in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0030] The battery generates a large amount of heat during charging and discharging, and if heat dissipation is not in time, a series of serious consequences such as fire may be caused, in the process of dissipating heat for the battery, water cooling or air cooling is usually used for cooling, but the cooling effect of a single cooling method is not good, and the cooling demand of the battery cannot be met.

[0031] The utility model provides a battery cooling system.

[0032] Please refer to Figure 1 And Figure 2 In an embodiment of the utility model, the battery cooling system 100 includes a shell 11, a plurality of battery units 12, an inlet pipe 2, an outlet pipe 3 and a blowing device 4, the shell 11 has a cavity and a plurality of installation channels 111 penetrating along a first direction, the cavity is located on the side of the installation channel 111, and is arranged separately from the installation channel 111, the plurality of battery units 12 are respectively installed in the installation channel 111, the inlet pipe 2 and the outlet pipe 3 are respectively communicated with the cavity, the inlet pipe 2 is used for cooling medium to enter, the blowing device 4 is arranged at least in a group, is located on one side of the shell 11, and is arranged towards the shell 11. Wherein, the first direction, the second direction and the third direction are perpendicular to each other.

[0033] The technical scheme of the utility model installs a plurality of battery units 12 in the installation channel 111, the cavity is located on the side of the installation channel 111, and the wall surface for exchanging heat is arranged between the cavity and the installation channel 111, the cooling medium can enter the cavity from the inlet pipe 2 and contact the wall surface constituting the installation channel 111, the battery unit 12 installed in the installation channel 111 also contacts the wall surface constituting the installation channel 111, and the cooling medium exchanges heat with the battery unit 12 through the wall surface. To achieve liquid cooling. Wherein, the wall surface constituting the installation channel 111 can be set as metal with high thermal conductivity. In addition, the blowing device 4 is arranged on one side of the shell 11 and blows towards the shell 11 and the battery unit 12 on the shell 11, to realize air cooling. When the temperature of the battery unit 12 is low, air cooling is carried out, when the temperature is high, water cooling is carried out, and when the temperature is higher, water cooling and air cooling are carried out at the same time, to meet the cooling demand of the battery and improve the cooling effect of the battery.

[0034] The power of the battery pack is related to the number of battery cells 12. Generally, multiple battery cells 12 are arranged in a "one" shape to prevent the battery cells 12 from gathering and causing heat to concentrate and be difficult to dissipate. Correspondingly, multiple installation channels 111 are arranged along the second direction. The cavity also extends along the second direction, and the cross-sectional area of the cavity perpendicular to the second direction is the smallest. When the flow rate of the water inlet pipe 2 is constant, the water inlet pipe 2 and the water outlet pipe 3 are installed on the shell 11. The water inlet pipe 2 is connected to one side of the shell 11 along the second direction, and the water outlet pipe 3 is connected to the other side of the shell 11 along the second direction. At this time, the flow rate of the cooling medium in the cavity is the largest. Increasing the flow rate of the fluid increases the momentum transfer between the fluid and the heat transfer surface, increases the convective heat transfer coefficient, and thus improves the heat transfer efficiency. However, it is generally not more than 0.6 m3 / s.

[0035] In liquid cooling, the fluid forms a turbulent flow, which can break the boundary layer of the fluid, promote the diffusion of heat, and make the heat in the fluid more evenly distributed, thereby improving the heat transfer efficiency. Turbulent flow can change the flow direction and speed of the fluid during heat transfer, thereby increasing the contact area between the fluid and the solid heat transfer surface. The increase in heat transfer surface area can improve the heat transfer efficiency. Turbulent flow increases the temperature gradient and the driving force of heat transfer, thereby improving the heat transfer efficiency. Therefore, in order to achieve better cooling effect, it is necessary to form turbulent flow in the cavity. In an embodiment, multiple gap intervals are formed between multiple installation channels 111, and the battery cooling system 100 further comprises multiple turbulence blocks 5. Multiple turbulence blocks 5 are arranged in multiple gap intervals, respectively. The turbulence blocks 5 and the installation channels 111 are arranged in a third direction. When the fluid flows through the turbulence blocks 5, the turbulence blocks 5 will interfere with the normal flow of the fluid, causing the flow lines of the fluid to change, forming eddies and turbulent flow.

[0036] In order to better form turbulent flow, the turbulence blocks 5 extend along the third direction. In the second direction, two adjacent turbulence blocks 5 are arranged in a third direction and are respectively fixedly connected to two opposite inner side walls of the cavity in the third direction. The size of the turbulence block 5 in the third direction is greater than or equal to half of the size of the cavity in the third direction.

[0037] For the cylindrical battery cell 12, the profile of the installation channel 111 cut by the plane of the first direction is a curve, and the battery cooling system 100 further comprises a plurality of turbulence blocks 5 arranged opposite to the installation channel 111 in the third direction, and the side of the turbulence block 5 opposite to the installation channel 111 is a curved surface, and the shortest distance from any point on the curved surface to the installation channel 111 is equal, that is, the width of the water flow channel on both sides of the installation channel 111 is equivalent.

[0038] When the power requirement of the battery pack is large, the shell 11 and the plurality of battery cells 12 form a battery module 1, and the battery module 1 is provided in multiple groups; in order to facilitate liquid cooling of each battery module 1, the water inlet pipe 2 is provided with a plurality of branches respectively communicating with the cavities of each battery module 1. In order to prevent heat concentration and difficult cooling, the plurality of battery modules 1 are arranged at intervals along the third direction, and the battery cooling system 100 comprises a box body 6, and the plurality of battery modules 1 are installed in the box body 6 to form an integrated battery pack, and one side of the box body 6 in the second direction is provided with an air inlet 61, and the other side of the box body 6 in the second direction is provided with an air outlet 62; the air blowing device 4 is arranged at the air inlet 61 to realize air cooling.

[0039] In order to make each battery module 1 receive better air cooling effect, the air inlet 61 is provided with a plurality of air inlets, and the air outlet 62 is provided with a plurality of air outlets, and the plurality of air inlets and / or the plurality of air outlets are respectively arranged corresponding to the gaps between the plurality of battery modules 1, so as to ensure the flow effect of the air blowing gas, and the air blowing device 4 is arranged at one of the air inlets 61. When the flow rate in the box body 6 increases, the pressure in the box body 6 decreases, and more gas is blown into the box body 6 from other air inlets 61 due to air pressure.

[0040] In order to guarantee the air cooling effect of each battery module 1, the gap between the air inlet 61 and the battery module 1 needs to be arranged correspondingly, and then the position of the battery module 1 installed in the box body 6 needs to be fixed or limited, so that a plurality of positioning blocks 7 are arranged in the box body 6, and the plurality of positioning blocks 7 limit the installation interval, so that the battery module 1 is limited and installed.

[0041] In order to realize suitable thermal management for the battery unit 12, the battery cooling system 100 comprises a water pump 8 arranged in the water inlet pipe 2, a temperature sensor installed in the installation channel 111, and a control device electrically connected with the air blowing device 4, the water pump 8 and the temperature sensor respectively. When the temperature of the battery unit 12 is low, air cooling is performed; when the temperature is high, water cooling is performed; and when the temperature is higher, both water cooling and air cooling are performed, so as to meet the heat dissipation requirement of the battery and improve the cooling effect of the battery.

[0042] The above merely illustrates the embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, direct / indirect application in other related technical fields, or the like, which is made based on the technical concept of the present application and the content of the present application specification and drawings, is included in the patent protection scope of the present application.

Claims

1. A battery cooling system, characterized by, Comprising a housing having a cavity and a plurality of mounting channels penetrating in a first direction, the cavity being located at the periphery of the mounting channels and being spaced apart from the mounting channels; a plurality of battery units respectively mounted in the mounting channels; a water inlet pipe and a water outlet pipe respectively communicating with the cavity, the water inlet pipe being used for the cooling medium to enter; a plurality of air blowing devices arranged on one side of the housing and facing the housing.

2. The battery cooling system of claim 1, wherein, The plurality of mounting channels are spaced apart in a second direction, the water inlet pipe and the water outlet pipe are mounted on the housing, the water inlet pipe is connected to one side of the housing in the second direction, and the water outlet pipe is connected to the other side of the housing in the second direction.

3. The battery cooling system of claim 2, wherein, A plurality of gap intervals are formed between the plurality of mounting channels, and the battery cooling system further comprises a plurality of turbulence blocks, the plurality of turbulence blocks are respectively arranged in the plurality of gap intervals, and the turbulence blocks are arranged in a third direction opposite to the mounting channels.

4. The battery cooling system of claim 3, wherein, The turbulence blocks extend in the third direction, and in the second direction, two adjacent turbulence blocks are arranged in the third direction and are respectively fixedly connected to two inner side walls of the cavity in the third direction.

5. The battery cooling system of claim 4, wherein, The size of the turbulence block in the third direction is greater than or equal to half of the size of the cavity in the third direction.

6. The battery cooling system of claim 3, wherein, The profile of the mounting channel intersected by a plane perpendicular to the first direction is a curve, the battery cooling system further comprises a plurality of turbulence blocks, the turbulence blocks are arranged opposite to the mounting channels in the third direction, one side of the turbulence block opposite to the mounting channel is a curved surface, and the shortest distance from any point on the curved surface to the mounting channel is equal.

7. The battery cooling system of claim 2, wherein, The housing and the plurality of battery units form a battery module, and a plurality of battery modules are spaced apart in the third direction; The battery cooling system comprises a box body, the plurality of battery modules are mounted on the box body, one side of the box body in the second direction is provided with an air inlet, and the other side of the box body in the second direction is provided with an air outlet; The air blowing device is arranged at the air inlet.

8. The battery cooling system of claim 7, wherein, The air inlet is provided with a plurality of air inlets, the air outlet is provided with a plurality of air outlets, the plurality of air inlets and / or the plurality of air outlets are respectively arranged corresponding to the gaps between the plurality of battery modules, and the air blowing device is arranged at one of the air inlets.

9. The battery cooling system of claim 7, wherein, A plurality of positioning blocks are arranged in the box body, the plurality of positioning blocks limit the mounting interval, and the battery module is limited and mounted.

10. The battery cooling system of claim 1, wherein, The battery cooling system comprises: a water pump arranged in the water inlet pipe; a temperature sensor mounted in the mounting channel; a control device electrically connected with the air blowing device, the water pump and the temperature sensor.

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