Filter assembly, liquid cooling system, battery pack and energy storage device

Abstract

The utility model provides a filter assembly, a liquid cooling system, a battery pack and an energy storage device, the filter assembly is applied to the liquid cooling system, the filter assembly comprises a shell and a magnetic part, the shell is used for connecting a liquid cooling pipe, the shell is internally provided with a filter chamber, and the filter chamber is communicated with a liquid cooling flow channel. The magnetic part is installed in the shell and located in the filtering cavity, the magnetic part is used for adsorbing metal chips in the cooling liquid flowing into the filtering cavity, the magnetic part is arranged in the shell so that the magnetic part can adsorb the metal chips in the cooling liquid flowing into the filtering cavity, and the metal chips are prevented from flowing in the liquid cooling system; therefore, the overall safety of the battery pack is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a filtering assembly, a liquid cooling system, a battery pack and an energy storage device. BACKGROUND

[0002] In the related art, due to the manufacturing process, there may be some metal chips in the battery pack box and some parts in the box. In the immersion liquid cooling system, these metal chips circulate in the immersion liquid throughout the battery pack. On the one hand, the overall insulation performance of the immersion battery pack mixed with metal chips will decrease, thereby affecting the safety performance of the battery pack. On the other hand, the metal chips circulating in the liquid cooling system for a long time will cause the liquid cooling system to be blocked, thereby affecting the reliable operation of the energy storage system. SUMMARY

[0003] Embodiments of the present application provide a filtering assembly, a liquid cooling system, a battery pack and an energy storage device, which can improve the technical problem of metal chip residue.

[0004] In a first aspect, the present application provides a filtering assembly applied to a liquid cooling system, wherein the liquid cooling system comprises a liquid cooling pipe, and a liquid cooling flow channel is arranged in the liquid cooling pipe, and the filtering assembly comprises:

[0005] a housing for connecting the liquid cooling pipe, wherein a filtering chamber is arranged in the housing, and the filtering chamber is communicated with the liquid cooling flow channel;

[0006] a magnetic member mounted on the housing and located in the filtering chamber, wherein the magnetic member is used for adsorbing metal chips in the cooling liquid flowing into the filtering chamber.

[0007] In some embodiments, the housing comprises two first side walls arranged oppositely, one of the first side walls is provided with an inlet connected to the liquid cooling pipe, and the other of the first side walls is provided with an outlet connected to the liquid cooling pipe, and the magnetic member is mounted between the two first side walls.

[0008] In some embodiments, the housing further comprises two second side walls arranged oppositely, each of the second side walls is connected between the two first side walls, one end of the magnetic member is mounted on one of the second side walls, and the other end of the magnetic member is mounted on the other of the second side walls.

[0009] In some embodiments, the filtering assembly further comprises a filter member, the filter member is arranged on one side of the magnetic member close to the inlet, one end of the filter member is mounted on one of the second side walls, and the other end of the filter member is mounted on the other of the second side walls.

[0010] In some embodiments, the housing has a receiving space, and the magnetic member is arranged in the receiving space. The housing includes an inner wall facing the receiving space. The inner wall has a liquid flow channel surrounding the magnetic member. One end of the liquid flow channel is connected to the liquid inlet, and the other end of the liquid flow channel is connected to the liquid outlet.

[0011] In some embodiments, the housing includes an outer frame and a fixed portion. The outer frame includes two first side walls. The fixed portion is arranged between the two first side walls. The first side wall having the liquid inlet is arranged apart from the fixed portion and forms a liquid receiving cavity. The fixed portion has the receiving space formed therein. The fixed portion includes a first portion and a second portion arranged on two sides of the magnetic member, respectively. The first portion has a liquid inlet passage connecting the liquid flow channel and the liquid receiving cavity. The second portion has a liquid outlet passage connecting the liquid flow channel and the liquid outlet.

[0012] In some embodiments, the filter assembly further includes a filter member, and the filter member is sleeved on the magnetic member.

[0013] In some embodiments, the magnetic member is a magnetic filter screen, and the magnetic filter screen is arranged in the filter chamber.

[0014] The application further provides a liquid cooling system, comprising:

[0015] The filter assembly as described above;

[0016] A liquid cooling member;

[0017] At least two liquid cooling pipes, each of which is connected to the liquid cooling member. One of the liquid cooling pipes is connected to one side of the housing, and the other of the liquid cooling pipes is connected to the other side of the housing.

[0018] In some embodiments, the liquid cooling system includes a plurality of filter assemblies, and the plurality of filter assemblies are connected in sequence.

[0019] The application further provides a battery pack, comprising:

[0020] A box body;

[0021] The liquid cooling system as described above, and the liquid cooling system is arranged in the box body.

[0022] The application further provides an energy storage device, comprising:

[0023] A cabinet body;

[0024] A battery cluster arranged in the cabinet body;

[0025] The liquid cooling system as described above, and the liquid cooling system is arranged in the cabinet body, and the liquid cooling pipes are connected to the battery cluster.

[0026] Advantages of embodiments of the present application:

[0027] In embodiments of the present application, a filter assembly is provided for application to a liquid cooling system, the filter assembly comprising a housing and a magnetic member, the housing being configured to connect to the liquid cooling pipe, the housing having a filter chamber formed therein, the filter chamber being in communication with the liquid cooling flow channel. The magnetic member is mounted to the housing and located in the filter chamber, and is configured to adsorb metal debris in the cooling liquid flowing into the filter chamber. By providing the magnetic member in the housing, the magnetic member can adsorb metal debris in the cooling liquid flowing into the filter chamber and collect in the filter chamber of the housing, so as to prevent the metal debris from flowing with the cooling liquid in the liquid cooling system, thereby improving the overall safety of the battery pack. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0029] Figure 1 is a structural schematic diagram of a battery pack and a filter assembly provided by embodiments of the present application Figure 1 ;

[0030] Figure 2 is a sectional view of the battery pack and the filter assembly shown in Figure 1 ; Figure 1

[0031] Figure 3 is an enlarged schematic diagram of the local part A shown in Figure 2 ;

[0032] Figure 4 is a sectional view of the battery pack and the filter assembly shown in Figure 1 ; Figure 2

[0033] Figure 5 is an enlarged schematic diagram of the local part B shown in Figure 4 ;

[0034] Figure 6 is a sectional view of the battery pack and the filter assembly shown in Figure 1 ; Figure 3

[0035] Figure 7 is an enlarged schematic diagram of the local part C shown in Figure 6 .

[0036] Figure 8 is a structural schematic diagram of a battery pack provided by embodiments of the present application;​​​

[0037] Figure 9 is Figure 8 a sectional view of the battery pack shown in FIG. 1;

[0038] Figure 10 is Figure 9 an enlarged schematic view of the partial D shown in FIG. 1.

[0039] Reference signs:

[0040] 100, filter assembly;

[0041] 10, housing; 101, filter chamber; 102, fixed part; 103, outer frame; 1021, liquid inlet channel; 1022, liquid outlet channel; 1023, liquid passage; 1024, liquid containing cavity; 11, first side wall; 111, liquid inlet; 112, liquid outlet; 12, second side wall;

[0042] 20, magnetic part;

[0043] 30, filter part;

[0044] 200, liquid cooling system; 201, liquid cooling pipe;

[0045] 300, battery pack; 301, box. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the orientation words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific direction is the direction of the drawing surface in the drawings; and "inner" and "outer" refer to the contour of the device.

[0047] Please refer to Figures 1-3 , Figure 1 is a structural schematic diagram of the battery pack and the filter assembly provided by the embodiments of the present application Figure 1 , Figure 2 is Figure 1 a sectional view of the battery pack and the filter assembly shown in FIG. 1 Figure 1 , Figure 3 is Figure 2An enlarged view of the local part A is shown. The application provides a filter assembly 100 applied to a liquid cooling system 200, the filter assembly 100 comprising a shell 10 and a magnetic member 20, the shell 10 being used for connecting the liquid cooling pipe 201, the shell 10 being provided with a filter chamber 101 inside, the filter chamber 101 being communicated with the liquid cooling flow channel. The magnetic member 20 is installed in the shell 10 and located in the filter chamber 101, and the magnetic member 20 is used for adsorbing metal debris in the cooling liquid flowing into the filter chamber 101.

[0048] Specifically, due to the possibility of metal debris in the manufacturing process of the battery pack box and some parts in the box, in the immersion liquid cooling system, these metal debris circulate in the immersion liquid throughout the battery pack 300. On the one hand, the insulation performance of the immersion battery pack 300 mixed with metal debris will be reduced, thereby affecting the safety performance of the battery pack; on the other hand, the metal debris circulating in the liquid cooling system 200 for a long time will cause the liquid cooling system to be blocked, affecting the reliable operation of the energy storage system. The application sets the magnetic member 20 in the shell 10, so that the magnetic member 20 can adsorb the metal debris in the cooling liquid flowing into the filter chamber 101 and remain in the filter chamber 101 of the shell 10, which can better collect the metal debris to avoid the metal debris flowing in the cooling liquid in the liquid cooling system 200, thereby improving the overall safety of the battery pack 300.

[0049] It can be understood that the magnetic member 20 and the shell 10 can be integrally formed, such as injection molding; or can be separately formed, for example, the magnetic member 20 and the shell 10 are connected and fixed by welding, bonding or the like in a non-detachable manner; or the magnetic member 20 can be detachably installed in the shell 10 by clamping, inserting, screwing or the like. Compared with the non-detachable structure, the detachable magnetic member 20 can increase the convenience of use for the user, so that the user can replace the magnetic member 20 according to the actual situation.

[0050] Please refer to Figures 4-5 , Figure 4 is Figure 1 the cross-sectional view of the battery pack and the filter assembly shown in Figure 2 , Figure 5 is Figure 4 the enlarged view of the local part B shown in. In some embodiments, the shell 10 comprises two oppositely arranged first side walls 11, one first side wall 11 being provided with a liquid inlet 111 connected to the liquid cooling pipe 201, and the other first side wall 11 being provided with a liquid outlet 112 connected to the liquid cooling pipe 201, and the magnetic member 20 is installed between the two first side walls 11.

[0051] Specifically, the first side wall 11 is two side walls in the height direction of the shell 10, which can be the same as the height direction of the battery pack 300. The two first side walls 11 are arranged in parallel, one liquid cooling pipe 201 is an inlet pipe connected to the liquid inlet 111, and the other liquid cooling pipe 201 is an outlet pipe connected to the liquid outlet 112. The liquid inlet 111 and the liquid outlet 112 are arranged on the two sides of the magnetic member 20, so that the cooling liquid can flow through the magnetic member 20.

[0052] In some examples, the liquid inlet 111 is lower than the liquid outlet 112, and the cooling liquid enters the filter chamber 101 from the liquid inlet 111, and after the water level rises, flows out of the filter chamber 101 along the liquid outlet 112; in some examples, the liquid inlet 111 is lower than the liquid outlet 112, and the cooling liquid enters the filter chamber 101 from the liquid inlet 111, and after the water level falls, flows out of the filter chamber 101 along the liquid outlet 112. The positions of the liquid outlet 112 and the liquid inlet 111 are not limited in this application.

[0053] In some embodiments, the shell 10 further comprises two second side walls 12 arranged opposite to each other, each of the second side walls 12 is connected between the two first side walls 11, one end of the magnetic member 20 is mounted to one of the second side walls 12, and the other end is mounted to the other second side wall 12.

[0054] Specifically, the second side wall 12 is two side walls in the length direction of the shell 10, which can be the same as the length direction of the battery pack 300. The two second side walls 12 are arranged in parallel, and the first side wall 11 arranged opposite to the second side wall 12 forms a cubic shape. The magnetic member 20 is mounted between the two second side walls 12, and has the same height as the first side wall 11. When the cooling liquid flows from one first side wall 11 to the other first side wall 11, the magnetic member 20 can increase the adsorption area of the metal debris.

[0055] In some embodiments, the filter assembly 100 further comprises a filter 30 arranged on the side of the magnetic member 20 close to the liquid inlet 111. It can be understood that the filter 30 can filter larger metal debris in the cooling liquid before the cooling liquid passes through the magnetic member 20, so that the magnetic member 20 has more area to adsorb smaller metal debris.

[0056] In some examples, one end of the filter 30 is mounted to one of the second side walls 12, and the other end is mounted to the other second side wall 12. The filter 30 has the same height as the magnetic member 20, but the width of the filter 30 is greater than the width of the magnetic member 20, so that the area of the filter 30 is greater than the area of the magnetic member 20, to achieve better filtering effect before the cooling liquid flows through the magnetic member 20.

[0057] In some embodiments, the shell 10 has a receiving space in which the magnetic member 20 is arranged, and the shell 10 includes an inner wall facing the receiving space, the inner wall being provided with a liquid flow channel 1023 surrounding the magnetic member 20, one end of the liquid flow channel 1023 being communicated with the liquid inlet 111 and the other end being communicated with the liquid outlet 112. It can be understood that when the cooling liquid enters from the liquid inlet 111, it can flow along the surrounding liquid flow channel 1023 in a serpentine manner, so that as many metal chips as possible are collected in the magnetic member 20.

[0058] In some embodiments, the shell 10 includes an outer frame 103 and a fixed portion 102, the outer frame 103 includes two first side walls 11, the fixed portion 102 is arranged between the two first side walls 11, the first side wall 11 provided with the liquid inlet 111 is arranged apart from the fixed portion 102 and forms a liquid receiving cavity 1024, the fixed portion 102 forms a receiving space, the fixed portion 102 includes a first portion and a second portion respectively located on two sides of the magnetic member 20, the first portion is provided with a liquid inlet passage 1021 communicated with the liquid flow channel 1023 and the liquid receiving cavity 1024. The second portion is provided with a liquid outlet passage 1022 communicated with the liquid flow channel 1023 and the liquid outlet 112. By arranging the liquid receiving cavity 1024, the cooling liquid can be accumulated, and the cooling liquid entering from the liquid inlet 111 can enter the liquid inlet passage from the liquid receiving cavity 1024, regardless of whether the liquid inlet passage is arranged at a high position or a low position.

[0059] In some embodiments, the first side wall 11 provided with the liquid outlet 112 is arranged apart from the fixed portion 102 and forms a liquid receiving cavity 1024, the fixed portion 102 includes a first portion and a second portion respectively located on two sides of the magnetic member 20, the first portion is provided with a liquid inlet passage 1021 communicated with the liquid flow channel 1023 and the liquid inlet 111. The second portion is provided with a liquid outlet passage 1022 communicated with the liquid flow channel 1023 and the liquid receiving cavity 1024, and the filtered cooling liquid enters the liquid receiving cavity 1024 from the liquid outlet passage 1022 and flows out from the liquid outlet 112.

[0060] In some embodiments, the filter assembly 100 further includes a filter member 30, the filter member 30 being sleeved on the magnetic member 20. The filter member 30 has the same shape as the magnetic member 20 and is arranged on the outer periphery of the magnetic member 20. The metal chips are absorbed in the filter member 30 by the magnetic force of the magnetic member 20, and the cleaning of the metal chips is completed by periodically replacing the filter member 30.

[0061] In some examples, the height of the magnetic member 20 is equal to the height of the filter member 30, and the filter member 30 is fixed at one end of each of the second side walls 12, so that the filter member 30 covers the outer periphery of the magnetic member 20 to collect more metal chips.

[0062] In some examples, the filter 30 is sleeved on the filter, and is attached to the magnetic member 20;

[0063] In some examples, the filter 30 is sleeved on the filter, and forms a gap with the magnetic member 20.

[0064] Please refer to Figures 6-7 , Figure 6 is Figure 1 the cross-sectional view of the battery pack and the filter assembly shown in Figure 3 , Figure 7 is Figure 6 the enlarged view of part C shown in. In some embodiments, the magnetic member 20 is a magnetic filter screen, which is installed in the filter chamber 101.

[0065] In some examples, the magnetic member 20 includes a magnetic frame, one end of which is installed on one second side wall 12, and the other end of which is installed on the other second side wall 12.

[0066] In some examples, the magnetic member 20 includes a non-magnetic frame, which is provided with an opening, and a magnetic filter screen is arranged in the opening.

[0067] The application also provides a liquid cooling system 200, which includes the filter assembly 100 as described above and a liquid cooling member, and further includes at least two liquid cooling pipes 201, which are respectively connected to the liquid cooling member, one of the liquid cooling pipes 201 is connected to one side of the shell 10, and the other liquid cooling pipe 201 is connected to the other side of the shell 10.

[0068] In some embodiments, the liquid cooling system 200 includes a plurality of filter assemblies 100, and the plurality of filter assemblies 100 are connected in sequence. The arrangement of the plurality of filter assemblies 100 can further ensure the filtering effect. The number of the filter assemblies 100 can be three, four, five, etc., which is not limited in the application.

[0069] In some examples, the filter assembly 100 has three, one liquid cooling pipe 201 is connected to the first filter assembly 100, and the other liquid cooling pipe 201 is connected to the first filter assembly 100 and passes through the second filter assembly 100 and the third filter assembly 100.

[0070] In some examples, the filter assembly 100 has three, one liquid cooling pipe 201 passes through the first filter assembly 100 and is connected to the second filter assembly 100, and the other liquid cooling pipe 201 is connected to the second filter assembly 100 and passes through the third filter assembly 100.

[0071] In some examples, the three filter assemblies 100 are provided, one liquid cooling pipe 201 is arranged in the first filter assembly 100 and the second filter assembly 100, and connected to the third filter assembly 100, and another liquid cooling pipe 201 is connected to the third filter assembly 100.

[0072] The number of filter assemblies 100 and the connection mode of the liquid cooling pipe 201 can be set according to actual conditions, which are not limited in the present application.

[0073] Please refer to Figures 8-10 , Figure 8 is a structural schematic diagram of a battery pack provided by the embodiments of the present application, Figure 9 is Figure 8 is a sectional view of the battery pack shown in FIG. 1, Figure 10 is Figure 9 is an enlarged schematic diagram of part D shown in FIG. 1. The present application also provides a battery pack 300, which comprises a box body 301 and a liquid cooling system 200 as described above, and the liquid cooling system 200 is installed in the box body 301. Wherein, the liquid cooling member can be a liquid cooling plate, which comprises a substrate, the liquid cooling pipe 201 is partially embedded in the substrate and partially extends out of the substrate, the filter assembly 100 is connected to the part of the liquid cooling pipe 201 outside the substrate, and the battery pack 300 further comprises a battery module, which comprises a plurality of battery monomers, and the liquid cooling plate is arranged below the battery module.

[0074] The present application also provides an energy storage device, which comprises a cabinet and a battery cluster, and the battery cluster is arranged in the cabinet. The energy storage device further comprises a liquid cooling system 200 as described above, which is installed in the cabinet and the liquid cooling pipe 201 is connected to the battery cluster. Wherein, the liquid cooling member can be a compressor, a water chiller, etc., the battery cluster comprises a plurality of battery packs 300 arranged in an array, and the plurality of battery packs 300 can be arranged in the horizontal direction and the vertical direction, the energy storage device further comprises a plurality of liquid cooling plates, the liquid cooling plates are connected to the battery packs 300 correspondingly, the liquid cooling member outputs cooling liquid to the liquid cooling plates through the liquid cooling pipe 201, and the battery packs 300 and the liquid cooling plates exchange heat to take away the heat generated by the battery packs 300. The cooling of the battery packs 300 is realized. The cooling liquid after heat exchange flows back to the liquid cooling member through the liquid cooling pipe 201 and is cooled again, and the process is repeated continuously, so that the liquid cooling member continuously outputs low-temperature cooling liquid, thereby realizing the continuous cooling of the battery packs 300.

[0075] The above has carried out the detailed introduction to the embodiment of the application, the principle and implementation mode of the application have been described by applying specific examples in this paper, the above embodiment explanation is only used for helping understanding the method of the application and its core idea; at the same time, for the person skilled in the art, according to the idea of the application, there will be changes in specific implementation mode and application range, and the above-mentioned, the content of the specification should not be understood as the limitation of the application.

Claims

1. A filter assembly applied to a liquid cooling system, the liquid cooling system comprising a liquid cooling pipe, the liquid cooling pipe being provided with a liquid cooling flow channel therein, characterized in that, The filter assembly comprises: a housing for connecting the liquid cooling pipe, the housing being provided with a filter chamber therein, the filter chamber being communicated with the liquid cooling flow channel; a magnetic member mounted on the housing and located in the filter chamber, the magnetic member being used for adsorbing metal scraps in the cooling liquid flowing into the filter chamber.

2. The filter assembly of claim 1, wherein, The housing comprises two first side walls arranged oppositely, one of the first side walls being provided with an inlet for connecting the liquid cooling pipe, and the other of the first side walls being provided with an outlet for connecting the liquid cooling pipe, the magnetic member being mounted between the two first side walls.

3. The filter assembly of claim 2, wherein, The housing further comprises two second side walls arranged oppositely, each of the second side walls being connected between the two first side walls, one end of the magnetic member being mounted on one of the second side walls and the other end of the magnetic member being mounted on the other of the second side walls.

4. The filter assembly of claim 2, wherein, The filter assembly further comprises a filter member, the filter member being arranged on the side of the magnetic member close to the inlet.

5. The filter assembly of claim 2, wherein, The housing is provided with a containing space therein, the magnetic member being arranged in the containing space, the housing comprising an inner wall facing the containing space, the inner wall being provided with a liquid passing flow channel surrounding the magnetic member, one end of the liquid passing flow channel being communicated with the inlet and the other end of the liquid passing flow channel being communicated with the outlet.

6. The filter assembly of claim 5, wherein, The housing comprises an outer frame and a fixing portion, the outer frame comprising the two first side walls, the fixing portion being arranged between the two first side walls, the first side wall provided with the inlet being arranged spaced apart from the fixing portion and forming a liquid containing cavity, the fixing portion being provided with the containing space, the fixing portion comprising a first portion and a second portion located on two sides of the magnetic member respectively, the first portion being provided with an inlet passage communicated between the liquid passing flow channel and the liquid containing cavity, and the second portion being provided with an outlet passage communicated between the liquid passing flow channel and the outlet.

7. The filter assembly of any one of claims 1-3, wherein, The filter assembly further comprises a filter member, the filter member being sleeved on the magnetic member.

8. The filter assembly of any one of claims 1-3, wherein, The magnetic member is a magnetic filter screen, the magnetic filter screen being mounted in the filter chamber.

9. A liquid cooling system, characterized by, The filter assembly comprises: The filter assembly according to any one of claims 1-8; a liquid cooling member; at least two liquid cooling pipes, the two liquid cooling pipes being connected to the liquid cooling member respectively, one of the liquid cooling pipes being connected to one side of the housing and the other of the liquid cooling pipes being connected to the other side of the housing.

10. The liquid cooling system of claim 9, wherein, The liquid cooling system comprises a plurality of filter assemblies, the plurality of filter assemblies being connected in sequence.

11. A battery pack, characterized by, The filter assembly comprises: a box body; The liquid cooling system according to claim 9 or 10, the liquid cooling system being mounted on the box body.

12. An energy storage device, characterized by The filter assembly comprises: a cabinet body; a battery cluster arranged in the cabinet body; The liquid cooling system according to claim 9 or 10, the liquid cooling system being mounted on the cabinet body, and the liquid cooling pipe being connected to the battery cluster.

Images