Battery pack and electric equipment

Abstract

The utility model discloses a battery pack and electric equipment, and belongs to the technical field of batteries, the battery pack comprises: a collecting pipe, in which a first channel and a second channel spaced from each other are arranged; the liquid cooling pipe is communicated with the first channel; a liquid cooling flow channel and an exhaust flow channel which are spaced from each other are arranged in the composite pipe; the composite pipe is provided with an air inlet, the air inlet communicates with the exhaust flow channel, the liquid cooling flow channel communicates with the first channel, and the exhaust flow channel communicates with the second channel; the battery is provided with a pressure relief piece, the battery is in contact with the liquid cooling pipe and the composite pipe, and the pressure relief piece is communicated with the air inlet. According to the battery pack, timely heat dissipation in the battery using process is facilitated, erupted high-temperature gas is rapidly treated when the battery cell is in thermal runaway, and the using performance and safety of the battery pack are improved.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and specifically relates to a battery pack and electrical equipment. Background Art

[0002] During the use of the battery pack, the battery cells will generate heat, and it is necessary to effectively dissipate the heat of the battery cells in a timely manner to avoid heat accumulation and adverse effects on the performance and service life of the battery pack.

[0003] At the same time, due to various unexpected situations, the battery cells may experience thermal runaway and produce a large amount of high-temperature gas, which will be ejected from the explosion-proof valve of the battery cells. If the ejected high-temperature gas cannot be handled in time, it will easily damage other battery cells and may even cause more serious safety accidents. Utility Model Content

[0004] Purpose of the utility model: The embodiment of the present application provides a battery pack, which aims to solve the problems of how to dissipate heat in time during the use of the battery and how to deal with the eruption of high-temperature gas when the battery cell thermally runs away; another purpose of the present application is to provide an electrical device using the above-mentioned battery pack.

[0005] Technical solution: A battery pack described in an embodiment of the present application includes:

[0006] A collector, wherein a first channel and a second channel spaced apart from each other are provided in the collector;

[0007] a liquid cooling pipe, wherein the liquid cooling pipe and the collecting pipe are arranged in a first direction, and the liquid cooling pipe is connected to the first channel;

[0008] A composite tube, wherein the composite tube and the manifold are arranged in the first direction, and the composite tube (3) and the liquid cooling tube are arranged in the second direction, wherein the composite tube is provided with a liquid cooling channel and an exhaust channel spaced apart from each other, wherein the composite tube is provided with an air inlet, wherein the air inlet is connected to the exhaust channel, wherein the liquid cooling channel is connected to the first channel, and wherein the exhaust channel is connected to the second channel;

[0009] A battery, wherein the battery is provided with a pressure relief piece, the battery and the liquid cooling tube are arranged in a third direction, and the battery is in contact with the liquid cooling tube and the composite tube, the pressure relief piece is connected to the air inlet, and the first direction, the second direction and the third direction intersect each other.

[0010] In some embodiments, the pressure relief member is aligned with the air inlet, and the air inlet covers the pressure relief member.

[0011] In some embodiments, a partition is provided in the collecting pipe, and the partition includes at least two partition plates spaced apart in the second direction, the partition plates connect the collecting pipe, and adjacent partition plates and the collecting pipe form the second channel, and the second channel and the exhaust flow channel are connected in the first direction.

[0012] In some embodiments, the composite tube is provided in plurality, and the plurality of composite tubes are arranged in the second direction;

[0013] A plurality of partitions and support members are provided in the collecting pipe, and the plurality of support members are arranged in the second direction. The partition includes at least two partition sheets arranged at intervals in the second direction. The partition sheets and the support members are arranged in the third direction, and a side of the support member away from the partition sheet has a gap with the inner wall of the collecting pipe. The partitions and the support members are respectively connected to the collecting pipe, and the adjacent partition sheets, the support members and the collecting pipe form the second channel, and each of the second channels and each of the exhaust flow channels are arranged correspondingly.

[0014] In some embodiments, the manifold is provided with a first exhaust port, and the first exhaust port is connected to the second channel;

[0015] The battery pack also includes a box body, which has a placement cavity. The collecting pipe, the liquid cooling tube, the composite tube and the battery are all arranged in the placement cavity. The box body is provided with an exhaust member, and the exhaust member is connected to the first exhaust port.

[0016] In some embodiments, the first exhaust port is located on a side of the collector facing away from the battery.

[0017] In some embodiments, the box body includes a bottom plate and a plurality of frame beams disposed on the bottom plate, and the plurality of frame beams are sequentially connected to form the placement cavity with the bottom plate;

[0018] A third channel is arranged in the frame beam, a second exhaust port is opened on the side of the frame beam facing the placement cavity, the second exhaust port is connected to the third channel and the first exhaust port, the exhaust component is arranged on the side of the frame beam away from the placement cavity, and the exhaust component is connected to the third channel.

[0019] In some embodiments, the box body also includes a crossbeam arranged in the accommodation cavity, the crossbeam is connected to at least one of the frame beams, a fourth channel is arranged in the crossbeam, and the fourth channel is connected to at least one of the second exhaust ports, a third exhaust port is opened on the side wall of the crossbeam, and the third exhaust port is connected to the fourth channel and the first exhaust port.

[0020] In some embodiments, the crossbeam is disposed on one side of the manifold, and a side wall of the manifold on which the first exhaust port is formed is opposite to the third exhaust port.

[0021] In some embodiments, the crossbeam has two oppositely disposed ends, the two ends of the crossbeam are respectively connected to two opposite frame beams, and the fourth channel passes through the two ends of the crossbeam and is respectively connected to the corresponding second exhaust ports.

[0022] In some embodiments, the battery pack further includes a buffer member, which is disposed on a side of the composite tube facing away from the battery, and the buffer member is in contact with the composite tube.

[0023] An electrical device described in an embodiment of the present application includes the above-mentioned battery pack.

[0024] Beneficial effects: The battery pack of the embodiment of the present application includes: a collecting tube, a liquid cooling tube, a composite tube and a battery, the collecting tube is provided with a first channel and a second channel spaced apart from each other, the liquid cooling tube is connected to the first channel, the composite tube is provided with a liquid cooling flow channel and an exhaust flow channel spaced apart from each other, the composite tube is provided with an air inlet connected to the exhaust flow channel, the liquid cooling flow channel is connected to the first channel, and the exhaust flow channel is connected to the second channel; the battery is provided with a pressure relief piece, the battery is in contact with the liquid cooling tube and the composite tube, and the pressure relief piece is connected to the air inlet. The liquid cooling tube and composite tube of the battery pack are in contact with the battery for heat exchange during the use of the battery pack to achieve the effect of timely heat dissipation of the battery. When the battery has thermal runaway, the high-temperature gas is ejected by the pressure relief part and introduced into the exhaust flow channel through the air inlet. Then the high-temperature gas enters the second channel from the exhaust flow channel and is discharged in a centralized manner. The refrigerant in the first channel can simultaneously cool the high-temperature gas in the second channel. The refrigerant in the liquid cooling flow channel can cool the high-temperature gas in the exhaust flow channel, thereby reducing the discharge temperature of the high-temperature gas. The exhaust gas is concentrated in the collecting pipe, which is conducive to orderly guiding the timely discharge of the high-temperature gas, reducing the risk of damage to normal batteries in the battery pack, and improving the safety performance of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of the header, liquid cooling tube, and composite tube in the embodiment of the present application;

[0027] Figure 2 It is a broken view of the liquid cooling tube in the top view of the embodiment of the present application;

[0028] Figure 3 This is an embodiment of the present application Figure 2 Schematic diagram of the cross-sectional structure along line AA;

[0029] Figure 4 This is an embodiment of the present application Figure 2 The schematic diagram of the cross-sectional structure along the BB line;

[0030] Figure 5 This is a schematic diagram of the structure of the liquid cooling tube and the composite tube of the embodiment of the present application when the battery is arranged in a top view;

[0031] Figure 6 This is an embodiment of the present application Figure 5 Schematic diagram of the cross-sectional structure along the CC line;

[0032] Figure 7 This is an embodiment of the present application Figure 6 A partial enlarged schematic diagram of part A;

[0033] Figure 8 This is an embodiment of the present application Figure 5 Schematic diagram of the cross-sectional structure along the DD line;

[0034] Fig. 9 This is a schematic diagram of the structure of the battery pack after the battery is installed in the embodiment of the present application;

[0035] Fig.10 This is a schematic diagram of an explosion of a box body without batteries arranged in an embodiment of the present application;

[0036] Fig.11 This is a schematic diagram of the structure of the box body in the top view of the embodiment of the present application;

[0037] Fig.12 This is an embodiment of the present application Fig.11 Schematic diagram of the cross-sectional structure along line EE;

[0038] Fig.13 This is an embodiment of the present application Fig.11 Schematic diagram of the cross-sectional structure along the FF line;

[0039] Fig.14 This is an embodiment of the present application Fig.13 A partial enlarged schematic diagram of part B;

[0040] Fig.15 This is an embodiment of the present application Fig.13 A partial enlarged schematic diagram of part C in the middle;

[0041] Reference numerals: 1, manifold; 10, separator; 100, separator; 101, support; 102, through hole; 103, separator; 11, first channel; 12, second channel; 13, first exhaust port; 14, liquid inlet; 15, liquid outlet; 16, plug; 2, liquid cooling tube; 20, liquid cooling channel; 21, first liquid cooling tube; 22, second liquid cooling tube; 3, composite tube; 30, air inlet; 31, liquid cooling channel; 32, exhaust channel; 4, battery; 40, exhaust port Pressing piece; 5. Box body; 50. Accommodation cavity; 51. Exhaust piece; 52. Bottom plate; 53. Side frame beam; 530. Third channel; 531. Second exhaust port; 532. Fifth channel; 533. Fourth exhaust port; 534. Fifth exhaust port; 535. First side frame beam; 536. Second side frame beam; 54. Crossbeam; 540. Fourth channel; 541. Third exhaust port; 6. Buffer piece; 7. Cooling exhaust module; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0042] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0043] In the description of the present application, it should be understood that the terms "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "multiple" means two or more, and at least one means one, two or more, unless otherwise clearly and specifically defined.

[0044] In the existing thermal management technology of power battery packs, the cold plate structure often adopts harmonica tube structure, stamping brazing plate structure, and blown cold plate structure; among them, the harmonica tube structure has the advantages of light weight, flexible design, low cost, and high production efficiency, and is widely used; during use, the battery is in direct contact with the harmonica tube, so that the refrigerant in the harmonica tube absorbs the heat generated by the battery to ensure timely heat dissipation of the battery. However, the battery may have thermal runaway problems due to various unexpected situations. The battery will generate a large amount of high-temperature gas and spray it from the battery pressure relief part. If the high-temperature gas is not handled in time, it is very easy to damage other batteries or even cause more serious safety accidents.

[0045] In view of this, an embodiment of the present application provides a battery pack, which can solve at least one of the above-mentioned defects.

[0046] Reference Figures 1 to 8 The battery pack includes at least one cooling and exhaust module 7 and a plurality of batteries 4. The cooling and exhaust module 7 includes a header 1, a liquid cooling tube 2 and a composite tube 3. In this embodiment, two headers 1 are provided in a single cooling and exhaust module 7, and the two headers 1 are spaced apart from each other, and the liquid cooling tube 2 and the composite tube 3 are connected between the two headers 1.

[0047] A partition 10 is provided in the collecting tube 1 to separate the internal space of the collecting tube 1 into a first channel 11 and a second channel 12; the two ends of the liquid cooling tube 2 are connected to the two collecting tubes 1 one by one, and a liquid cooling channel 20 is formed in the liquid cooling tube 2, and the liquid cooling channel 20 is connected to the first channel 11; the two ends of the composite tube 3 are connected to the two collecting tubes 1 one by one, and the composite tube 3 is provided with a liquid cooling channel 31 and an exhaust channel 32 spaced apart from each other, and an air inlet 30 is provided on the top surface of the composite tube 3, the air inlet 30 is connected to the exhaust channel 32, the liquid cooling channel 31 is connected to the first channel 11, and the exhaust channel 32 is connected to the second channel 12; a pressure relief member 40 is provided on the bottom surface of the battery 4, and the top surfaces of the composite tube 3 and the liquid cooling tube 2 are located at the same horizontal position, so the bottom surface of the battery 4 can contact the liquid cooling tube 2 and the composite tube 3 respectively, and the pressure relief member 40 is connected to the air inlet 30.

[0048] In some embodiments, a single collecting tube 1 may be provided with only one partition 10, and the partition 10 includes at least two partition plates 100, which connect the collecting tube 1 and form a second channel 12 as a whole with the collecting tube 1. At this time, the partition plates 100 are respectively connected to the collecting tube 1 at both ends of the third direction Z (not shown in the figure).

[0049] When the number of composite tubes 3 increases, the number of separators 10 needs to be increased to enclose more second channels 12 . At this time, it is also necessary to consider that the multiple second channels 12 will not block the first channels 11 from each other.

[0050] The liquid cooling tube 2 and the composite tube 3 have the liquid cooling channel 31. During the use of the battery 4, the battery 4 is in contact with the battery 4 for heat exchange, so that the battery 4 dissipates heat in time. When the battery 4 has thermal runaway, the high-temperature gas is ejected from the pressure relief member 40 and introduced into the exhaust channel 32 from the air inlet 30. Then the high-temperature gas enters the second channel 12 from the exhaust channel 32 and is discharged in a centralized manner. In this process, the refrigerant in the liquid cooling channel 31 can cool the high-temperature gas in the exhaust channel 32, and the refrigerant in the first channel 11 can cool the high-temperature gas in the second channel 12, thereby reducing the discharge temperature of the high-temperature gas. At the same time, the exhaust gas is concentrated in the manifold 1, which is conducive to guiding the high-temperature gas to be discharged in an orderly and timely manner, reducing the risk of damage to the normal batteries 4 in the battery pack, and improving the safety performance of the battery pack.

[0051] Specifically, refer to Figure 1 and Figure 2 In this embodiment, the liquid cooling tube 2 includes a first liquid cooling tube 212 and two second liquid cooling tubes 222. The first liquid cooling tube 212 and the second liquid cooling tube 222 differ only in width, that is, the width of the first liquid cooling tube 212 is greater than the width of the second liquid cooling tube 222. The two second liquid cooling tubes 222 are distributed one-to-one on both sides of the width direction of the first liquid cooling tube 212.

[0052] Reference Figure 1 , Figure 3 and Figure 4 In this embodiment, a single cooling exhaust module 7 includes two composite tubes 3. In other embodiments, the number of composite tubes 3 can be flexibly increased or decreased as needed. The composite tube 3 adopts a harmonica tube structure, wherein the composite tube 3 has two liquid cooling channels 31 and an exhaust channel 32, and the two liquid cooling channels 31 are respectively on opposite sides of the exhaust channel 32. In other embodiments, the number of liquid cooling channels 31 in a single composite tube 3 can be flexibly increased or decreased as needed.

[0053] Correspondingly, in this embodiment, a single manifold 1 corresponds to two composite pipes 3 and two exhaust flow channels 32, so two partitions 10 are provided in a single manifold 1. The partition 10 includes two partition sheets 100 and a partition plate 103. The specific installation structure is as follows: after the composite pipe 3 is connected to the manifold 1, refer to Figure 3 and Figure 4 The two separators 100 correspond one by one to the interval between the exhaust channel 32 and the two adjacent liquid cooling channels 31, and the separator 103 is fixedly connected to the bottom ends of the two separators 100. At this time, the separator 103, the separator 100 and the inner wall of the manifold 1 are mutually enclosed to form a second channel 12. That is, it can be understood that the separator 10 is intended to separately separate the inlet end of the exhaust channel 32 to form an independent channel in the manifold 1. At this time, the manifold 1 also forms a first channel 11 separated from the two second channels 12 due to the existence of the separator 10.

[0054] At the same time, in order to further strengthen the installation structure strength of the two partitions 10, refer to Figure 4 A support member 101 is connected between two partition plates 103 in a single header 1, and the support member 101 is also fixedly connected to the inner wall of the header 1. It can be understood that, referring to Figure 4 In this embodiment, the two partitions 10 in a single collecting tube 1 are respectively located on both sides of the access end of the first liquid cooling tube 212, and the support member 101 is horizontally placed at the access end of the first liquid cooling tube 212. In order to prevent the support member 101 from hindering the circulation movement of the refrigerant in the first liquid cooling tube 212 and the refrigerant in the second liquid cooling tube 222 in the second channel 12, a through hole 102 is penetrated on the support member 101.

[0055] It should be noted that, refer to Figure 1 and Figure 4 During the installation of the separator 10 and the support member 101, the separator 103 and the support member 101 are both metal plates, so the separator 103 and the support member 101 can be formed in one piece. One assembly method is to pre-groove the installation position of the separator 100 on the outside of the manifold 1 in correspondence with the separator 100, and the separator 103 and the support member 101 can be introduced from the end of the manifold 1, and the separator 100 and the separator 103 are welded at the installation position, and then the end of the manifold 1 is sealed with a plug 16.

[0056] In addition, refer to Figure 1 , Figure 3 and Figure 4 A liquid inlet 14 is provided on the top surface of one of the headers 1, and a liquid outlet 15 is provided on the top surface of the other header 1. The refrigerant enters the first channel 11 of one of the headers 1 through the liquid inlet 14 and is input into the first liquid cooling tube 212, the second liquid cooling tube 222 and the liquid cooling channel 31. After heat exchange with the battery 4, the refrigerant flows into the first channel 11 of the other header 1, and the refrigerant is finally discharged from the liquid outlet 15 for recirculation.

[0057] Reference Figure 6 , Figure 7 and Figure 8 In this embodiment, the pressure relief member 40 may be a pressure relief valve, a pressure relief notch, etc. Fig. 9, multiple batteries 4 are arranged on a single cooling exhaust module 7, and correspondingly, multiple air inlets 30 are arranged on the composite tube 3 along the length direction of the composite tube 3, each pressure relief member 40 corresponds to each air inlet 30 one by one and is arranged in alignment with each other, and the air inlet 30 covers the pressure relief member 40, that is, the positive projection of the pressure relief member 40 on the composite tube 3 is in the air inlet 30. Because the bottom surface of the battery 4 is completely in contact with the composite tube 3, it is beneficial to further reduce the leakage of high-temperature gas from the exhaust flow channel 32 during the exhaust process of the pressure relief member 40. In other embodiments, if the pressure relief member 40 is in the form of a pressure relief notch, the air inlet 30 only needs to ensure that it covers the engraving range of the pressure relief notch to ensure that the high-temperature gas is fully guided into the exhaust flow channel 32.

[0058] Reference Figure 7 A first exhaust port 13 connected to the second channel 12 is provided on the collecting pipe 1. In the present embodiment, the first exhaust port 13 is located on the side of the collecting pipe 1 away from the composite pipe 3. At this time, when the high-temperature gas in the second channel 12 is discharged from the first exhaust port 13, the high-temperature gas can be discharged in an orderly manner in a direction away from the battery 4, which is beneficial to further reduce the damage of the high-temperature gas to the battery 4 and improve the protection of the battery 4.

[0059] At the same time, refer to Fig. 9 and Fig.10 In this embodiment, the battery pack as a whole takes four cooling and exhaust modules 7 as an example. In other embodiments, the number of cooling and exhaust modules 7 can be flexibly set according to actual needs such as the number of batteries 4, the size of the battery pack, etc. The battery pack also includes a box 5 for accommodating the cooling and exhaust modules 7 and the batteries 4. The box 5 is provided with an exhaust member 51 to allow the high-temperature gas discharged from the first exhaust port 13 to discharge from the box 5. The exhaust member 51 can be an exhaust valve, a sealing plug, etc.

[0060] Specifically, refer to Fig.10 The box body 5 includes a bottom plate 52 and a plurality of frame beams 53 disposed on the bottom plate 52. In the present embodiment, there are actually four frame beams 53, which are sequentially connected to form a rectangular frame and enclosed with the bottom plate 52 to form a placement cavity 50. It should be noted that in the present embodiment, according to the different lengths of the frame beams 53, the four frame beams 53 include two first frame beams 535 disposed oppositely and two second frame beams 536 disposed oppositely, and the length of the first frame beam 535 is greater than the length of the second frame beam 536.

[0061] Reference Fig.10 , Fig.11 and Fig.12, a crossbeam 54 is fixed on the bottom plate 52 corresponding to each two cooling exhaust modules 7, and the crossbeam 54 is arranged opposite to the same side manifold 1 of the corresponding two cooling exhaust modules 7, and the crossbeam 54 is connected between the two first frame beams 535 to further enhance the structural stability of the overall box 5. In other embodiments, the crossbeam 54 is only connected to the bottom plate 52 and a single first frame beam 535, which can also achieve the effect of enhancing the structural stability. A fourth channel 540 is provided in the crossbeam 54 along its own length direction, and the fourth channel 540 runs through both ends of the length direction of the crossbeam 54. Correspondingly, a third channel 530 is provided in the first frame beam 535, and a second exhaust port 531 is opened at the end of the first frame beam 535 relative to the crossbeam 54, and the second exhaust port 531 is connected to the third channel 530 and is connected to the fourth channel 540. In other embodiments, one end of the crossbeam 54 can be closed, and only the other end is connected to a first frame beam 535, so that the fourth channel 540 can be connected to a third channel 530. Meanwhile, a third exhaust port 541 is provided on a side of the cross beam 54 opposite to the manifold 1 . A plurality of third exhaust ports 541 are provided along the length direction of the cross beam 54 . The third exhaust ports 541 are connected to the fourth channel 540 .

[0062] It should be noted that, refer to Fig.13 and Fig.14 In this embodiment, the cross beam 54 between the two cooling exhaust modules 7 arranged in sequence in the length direction of the first frame beam 535 actually has a manifold 1 on both opposite sides, so the third exhaust port 541 is provided on both opposite sides of the cross beam 54. The exhaust member 51 is arranged on the side of the first frame beam 535 away from the cross beam 54, and the exhaust member 51 can be communicated with the third channel 530.

[0063] It is understandable that when thermal runaway occurs in the battery 4, the high-temperature gas is guided from the second channel 12 to the fourth channel 540 via the first exhaust port 13 and finally enters the third channel 530. When the pressure reaches the preset upper limit of the exhaust port, the exhaust port can be opened and the pressure can be released and exhausted smoothly.

[0064] In addition, refer to Fig.10 , Fig.11 and Fig.15 In this embodiment, the second frame beam 536 is connected between the two first frame beams 535. In order to improve the exhaust efficiency of the box body 5, a fifth channel 532 is formed in the second frame beam 536. The fifth channel 532 runs through both ends of the second frame beam 536 in the length direction. The second frame beam 536 is provided with a fourth exhaust port 533 on the side wall facing the placement cavity 50. A plurality of fourth exhaust ports 533 are provided along the length direction of the second frame beam 536, and the fourth exhaust port 533 is connected to the fifth channel 532. Correspondingly, the first frame beam 535 is provided with a fifth exhaust port 534 on the side wall facing the second frame beam 536. The third channel 530 is connected to the fifth channel 532 through the fifth exhaust port 534.

[0065] It is understandable that one of the second frame beams 536 is as follows Fig.13 As shown, the fourth exhaust port 533 is used to assist exhaust toward the placement chamber 50; another second frame beam 536 is as shown Fig.15 As shown, it is opposite to the manifold 1 , so the second channel 12 of the manifold 1 can exhaust air through the first exhaust port 13 toward the opposite fourth exhaust port 533 .

[0066] In addition, refer to Fig.10 and Fig.15 The battery pack also includes a buffer 6. In this embodiment, the number of buffers 6 is the same as the number of cooling exhaust modules 7 and corresponds one to one. The buffer 6 is fixed to the top surface of the bottom plate 52 and is located at the bottom surface of the corresponding cooling exhaust module 7. Specifically, the buffer 6 can be made of a foam buffer material to form a plate. It can be understood that in this embodiment, the bottom surfaces of the composite tube 3 and the liquid cooling tube 2 are flush, so the bottom surfaces of the composite tube 3 and the liquid cooling tube 2 can be in contact with the top surface of the buffer 6. When thermal runaway occurs in the battery 4, high-temperature gas erupts from the bottom surface of the battery 4 directly facing the composite tube 3. The buffer 6 supports the composite tube 3 and the liquid cooling tube 2. On the one hand, it is beneficial to buffer the impact of the gas on the composite tube 3. On the other hand, it assists the composite tube 3 and the liquid cooling tube 2 in supporting the battery 4, thereby improving the protection of the composite tube 3 and the liquid cooling tube 2.

[0067] Accordingly, the embodiment of the present application further provides an electric device, which includes the above-mentioned battery pack. The electric device can be an electronic device such as a computer, a mobile phone, a power storage device, or a power vehicle. It can be understood that the electric device can have all the technical features and corresponding beneficial effects of the above-mentioned battery pack, which will not be repeated here.

[0068] The implementation principle of the embodiment of the present application is as follows: the battery 4 arranged in the box 5 is actually exhaust at the bottom. When the battery pack is used in a car, the box 5 needs to be installed at the bottom of the car. At this time, the ejection direction of the high-temperature gas after the thermal runaway of the battery 4 is away from the car, which is conducive to preventing the ejection of high-temperature gas or even sparks, flames, etc. into the car in the first place, thereby improving the edible safety of the battery pack;

[0069] The liquid cooling tube 2 and the composite tube 3 are in contact with the battery 4 for heat exchange during the use of the battery pack, so as to achieve the effect of timely heat dissipation of the battery 4. When the battery 4 has thermal runaway, the high-temperature gas is ejected by the pressure relief component 40 and introduced into the exhaust flow channel 32 from the air inlet 30. Then, the high-temperature gas enters the second channel 12 from the exhaust flow channel 32 and is discharged to the fourth channel 540 and the fifth channel 532. Finally, the high-temperature gas is gathered in the third channel 530. After reaching a certain pressure, it can be smoothly discharged by the exhaust component 51. This is conducive to orderly guiding the timely discharge of high-temperature gas, reducing the risk of damage to the normal batteries 4 in the battery pack, and improving the safety performance of the battery pack.

[0070] The above is a detailed introduction to a battery pack and electrical equipment provided in the embodiments of the present application, and specific examples are used to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application; ordinary technicians in this field should understand that: they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack, characterized in that: include: A collecting pipe (1), wherein a first channel (11) and a second channel (12) spaced apart from each other are provided in the collecting pipe (1); a liquid cooling pipe (2), wherein the liquid cooling pipe (2) and the collecting pipe (1) are arranged in a first direction (X), and the liquid cooling pipe (2) is connected to the first channel (11); A composite tube (3), wherein the composite tube (3) and the manifold (1) are arranged in the first direction (X), and the composite tube (3) and the liquid cooling tube (2) are arranged in the second direction (Y), wherein the composite tube (3) is provided with a liquid cooling channel (31) and an exhaust channel (32) spaced apart from each other, wherein the composite tube (3) is provided with an air inlet (30), wherein the air inlet (30) is connected to the exhaust channel (32), wherein the liquid cooling channel (31) is connected to the first channel (11), and wherein the exhaust channel (32) is connected to the second channel (12); A battery (4), wherein the battery (4) is provided with a pressure relief member (40), the battery (4) and the liquid cooling tube (2) are arranged in a third direction (Z), and the battery (4) is in contact with the liquid cooling tube (2) and the composite tube (3), the pressure relief member (40) is connected to the air inlet (30), and the first direction (X), the second direction (Y) and the third direction (Z) intersect each other.

2. The battery pack according to claim 1, characterized in that: The pressure relief member (40) is arranged in alignment with the air inlet (30), and the air inlet (30) covers the pressure relief member (40).

3. The battery pack according to claim 1, characterized in that: A partition (10) is provided in the manifold (1), the partition (10) comprising at least two partition sheets (100) spaced apart in the second direction (Y), the partition sheets (100) connecting the manifold (1), and adjacent partition sheets (100) and the manifold (1) enclosing the second channel (12), and the second channel (12) and the exhaust flow channel (32) are connected in the first direction (X).

4. The battery pack according to claim 1, characterized in that: The composite tube (3) is provided in plurality, and the plurality of composite tubes (3) are arranged in the second direction (Y); The manifold (1) is provided with a plurality of partitions (10) and support members (101), the plurality of support members (101) being arranged in the second direction (Y), the partition (10) comprising at least two partition sheets (100) arranged at intervals in the second direction (Y), the partition sheets (100) and the support members (101) being arranged in the third direction (Z), and a gap is formed between the side of the support member (101) facing away from the partition sheet (100) and the inner wall of the manifold (1), the partitions (10) and the support members (101) being connected to the manifold (1) respectively, the adjacent partition sheets (100), the support members (101) and the manifold (1) enclosing the second channel (12), and each of the second channels (12) and each of the exhaust flow channels (32) being arranged correspondingly.

5. The battery pack according to claim 1, characterized in that: The manifold (1) is provided with a first exhaust port (13), and the first exhaust port (13) is connected to the second channel (12); The battery pack further comprises a box (5), the box (5) having a placement cavity (50), the collecting tube (1), the liquid cooling tube (2), the composite tube (3) and the battery (4) are all arranged in the placement cavity (50), the box (5) is provided with an exhaust member (51), and the exhaust member (51) is connected to the first exhaust port (13).

6. The battery pack according to claim 5, characterized in that: The first exhaust port (13) is located on a side of the collecting pipe (1) facing away from the battery (4).

7. The battery pack according to claim 5, characterized in that: The box body (5) comprises a bottom plate (52) and a plurality of frame beams (53) arranged on the bottom plate (52), wherein the plurality of frame beams (53) are connected in sequence and form the placement cavity (50) with the bottom plate (52); A third channel (530) is arranged in the frame beam (53); a second exhaust port (531) is provided on a side of the frame beam (53) facing the placement cavity (50); the second exhaust port (531) is connected to the third channel (530) and the first exhaust port (13); the exhaust member (51) is arranged on a side of the frame beam (53) facing away from the placement cavity (50), and the exhaust member (51) is connected to the third channel (530).

8. The battery pack according to claim 7, characterized in that: The box body (5) further comprises a crossbeam (54) arranged in the accommodation cavity (50), the crossbeam (54) being connected to at least one of the frame beams (53), a fourth channel (540) being arranged in the crossbeam (54), and the fourth channel (540) being connected to at least one of the second exhaust ports (531), a third exhaust port (541) being arranged on a side wall of the crossbeam (54), and the third exhaust port (541) being connected to the fourth channel (540) and the first exhaust port (13).

9. The battery pack according to claim 8, characterized in that: The crossbeam (54) is arranged on one side of the header (1), and the side wall of the header (1) on which the first exhaust port (13) is opened is opposite to the third exhaust port (541).

10. The battery pack according to claim 8, characterized in that: The crossbeam (54) has two oppositely disposed ends, the two ends of the crossbeam (54) are respectively connected to two opposite frame beams (53), and the fourth channel (540) passes through the two ends of the crossbeam (54) and is respectively connected to the corresponding second exhaust ports (531).

11. The battery pack according to claim 1, characterized in that: The battery pack further comprises a buffer member (6), wherein the buffer member (6) is arranged on a side of the composite tube (3) facing away from the battery (4), and the buffer member (6) is in contact with the composite tube (3).

12. An electrical equipment, characterized in that: Comprising a battery pack as claimed in any one of claims 1 to 11.

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