Battery pack

Abstract

The invention discloses a battery pack, and relates to the technical field of batteries. In the battery pack, a battery module comprises a battery cell, an anti-explosion valve is arranged on one side, in the Z direction, of the battery cell, and an insulating stop block shields one side of the anti-explosion valve and is provided with a pressure relief through hole; the first liquid cooling plate is arranged on one side of the battery module and the insulating stop block, a pressure relief channel is arranged between the first liquid cooling plate and the insulating stop block, and the explosion-proof valve can exhaust air to the pressure relief channel through the pressure relief through hole; the space between the first liquid cooling plate and the battery module is filled with a plurality of first layers of heat-conducting structural adhesives which are arranged at intervals in the Y direction, and the first layers of heat-conducting structural adhesives cover the outer surfaces of the insulating check blocks in the Y direction. As the insulating stop block is added, the explosion-proof valve at the top of the battery cell can be shielded, the first layer of heat-conducting structural adhesive is prevented from shielding the explosion-proof valve, and the explosion-proof valve can be smoothly opened when the battery cell is in thermal runaway and is exhausted through the pressure relief through hole to relieve pressure. As the space is directly reserved between the first liquid cooling plate and the insulating stop block for exhausting, the pressure relief space is sufficient, and pressure can be relieved to a set area.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a battery pack. Background Art

[0002] A current battery pack includes a battery module and a first liquid cooling plate disposed above the battery module, which are connected by a thermally conductive structural adhesive. However, an explosion-proof valve is provided on the top of the battery cell in the battery module. When the thermally conductive structural adhesive is poured above the battery module, the thermally conductive structural adhesive easily covers the explosion-proof valve, causing the explosion-proof valve to lose its pressure relief capability.

[0003] Therefore, how to ensure the pressure relief capability of the explosion-proof valve of the battery cell in the battery module is a technical problem that those skilled in the art currently need to solve. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a battery pack capable of ensuring the pressure relief capability of the explosion-proof valve of the battery cell in the battery module.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A battery pack comprises a battery module, a first liquid cooling plate and an insulating block;

[0007] The battery module comprises a plurality of cells arranged in an array, each cell having an explosion-proof valve on one side along the Z direction, the insulating block extending along the X direction, and the insulating block shielding one side of the explosion-proof valve in the Z direction, and the insulating block is provided with a plurality of pressure relief through holes corresponding to the position of the explosion-proof valve;

[0008] The first liquid cooling plate is disposed on one side of the battery module and the insulating block along the Z direction, a pressure relief channel is provided between the first liquid cooling plate and the insulating block, and the explosion-proof valve can exhaust air to the pressure relief channel through the pressure relief through hole;

[0009] A plurality of first layers of thermally conductive structural adhesives spaced apart along the Y direction are filled between the first liquid cooling plate and the battery module, and the first layer of thermally conductive structural adhesives covers the outer surface of the insulating block in the Y direction.

[0010] Preferably, the insulating block includes a connecting plate and two vertical plates respectively connected to the connecting plate on both sides along the Y direction, the vertical plates and the connecting plate are arranged in sequence along the Z direction close to the battery module, and the pressure relief through hole is opened on the connecting plate.

[0011] Preferably, the first liquid cooling plate has a first groove body which is recessed along the Z direction and away from the insulating block, the first groove body is covered by the insulating block, and the vertical plate abuts against the first groove body; at least part of the pressure relief channel is formed between the insulating block and the first groove body.

[0012] Preferably, a buffer plate is further provided between the bottom of the first slot body and the insulating block, and at least a portion of the pressure relief channel is formed between the buffer plate and the insulating block.

[0013] Preferably, a plurality of the insulating blocks are arranged at intervals along the Y direction to divide the battery module into different heat-conducting areas; and the first layer of heat-conducting structural adhesive is distributed in different heat-conducting areas.

[0014] Preferably, it also includes a box body, a partition is arranged in the box body, the battery module is arranged in the box body on at least one side of the partition in the X direction and / or at least one side of the Y direction, and the insulating block is fixedly connected to one side of the partition along the Z direction through a connecting structure.

[0015] Preferably, it also includes a blister tray fixed to one side of the battery module along the Z direction, and at least part of the electrical signal collection components of the battery module are integrated on the blister tray; a tray through hole is opened on the blister tray, the insulating block is connected to the side of the blister tray away from the battery module along the Z direction, and the explosion-proof valve exhausts to the pressure relief through hole through the tray through hole.

[0016] Preferably, it further comprises a box body, wherein the box body comprises a first mounting groove and a second mounting groove;

[0017] The battery module is arranged in the first mounting groove, and the battery module also includes a bus, which is located on the side of the battery cell in the Z direction close to the first liquid cooling plate, and the notch of the first mounting groove protrudes from the surface of the bus away from the battery cell in the Z direction, and the outlet of the pressure relief channel is connected to the second mounting groove.

[0018] Preferably, it further comprises a box, wherein the first liquid cooling plate and the battery module are arranged in the box;

[0019] The gap between the battery module and the box body, and / or the gap between the first liquid cooling plate and the box body has a gap thermal conductive structural adhesive; and / or, it also includes a second liquid cooling plate arranged in the box body, the second liquid cooling plate is connected to the battery module through a second layer of thermal conductive structural adhesive, and the first liquid cooling plate and the second liquid cooling plate are located on both sides of the battery module in the Z direction.

[0020] Preferably, a temperature collecting member is further included, and the temperature collecting member is connected to the surface of the battery module in the X direction and / or the Y direction.

[0021] The battery pack provided by the present invention comprises a battery module, a first liquid cooling plate and an insulating block; the battery module comprises a plurality of battery cells arranged in an array, each battery cell has an explosion-proof valve on one side along the Z direction, the insulating block extends along the X direction, and the insulating block blocks one side of the explosion-proof valve in the Z direction, and the insulating block is provided with a plurality of pressure relief holes corresponding to the position of the explosion-proof valve; the first liquid cooling plate is arranged on one side of the battery module and the insulating block along the Z direction, a pressure relief channel is provided between the first liquid cooling plate and the insulating block, and the explosion-proof valve can exhaust air to the pressure relief channel through the pressure relief hole; a plurality of first layers of thermally conductive structural adhesives arranged at intervals along the Y direction are filled between the first liquid cooling plate and the battery module, and the first layer of thermally conductive structural adhesive covers the outer surface of the insulating block in the Y direction.

[0022] Since the insulating block is added, the explosion-proof valve on the top of the battery cell in the battery module is blocked accordingly. When the thermal conductive structural adhesive is poured into the top of the battery module to form the first layer of thermal conductive structural adhesive, since the insulating block has a certain height, the first layer of thermal conductive structural adhesive can be located on one side of the insulating block under the blocking of the side of the insulating block to prevent the first layer of thermal conductive structural adhesive from blocking the explosion-proof valve and the first layer of thermal conductive structural adhesive from blocking the pressure relief through hole, so as to ensure that the explosion-proof valve opens smoothly and releases pressure through the pressure relief through hole when the battery cell is thermally runaway. At the same time, since space is directly reserved between the first liquid cooling plate and the insulating block for the explosion-proof valve to exhaust and release pressure, while ensuring sufficient pressure relief space, the exhausted gas can be guided so that it can be exhausted to the set area, realizing directional exhaust and unified exhaust of each pressure relief through hole on the insulating block. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] FIG1 is an exploded view of a specific embodiment 1 of a battery pack provided by the present invention;

[0025] FIG2 is a schematic diagram of the structure of the main box in the first specific embodiment of the battery pack provided by the present invention;

[0026] FIG3 is a partial exploded view of a specific embodiment 1 of a battery pack provided by the present invention;

[0027] FIG4 is an assembly diagram of an insulating stopper of a specific embodiment 1 of a battery pack provided by the present invention;

[0028] FIG5 is a structural diagram of an insulating block of a specific embodiment 1 of a battery pack provided by the present invention;

[0029] FIG6 is a partial enlarged view of FIG5;

[0030] FIG7 is an assembly diagram of the first liquid cooling plate and the insulating block of the battery pack according to the first specific embodiment of the present invention;

[0031] FIG8 is an enlarged view of point A in FIG2 ;

[0032] Fig. 9 This is an assembly diagram of the insulating block of the second specific embodiment of the battery pack provided by the present invention;

[0033] Fig.10 It is an assembly diagram of the first liquid cooling plate and the insulating block of the specific embodiment 3 of the battery pack provided by the present invention;

[0034] Fig.11 It is an assembly diagram of a buffer plate and an insulating block of a specific embodiment 3 of a battery pack provided by the present invention;

[0035] Fig.12 for Fig.11 Enlarged view of the middle section.

[0036] Reference numerals:

[0037] Box body 1, main box body 11, side beam 111, cross beam 112, first mounting groove 113, second mounting groove 114, cover body 12, partition plate 13, card slot 131;

[0038] Battery module 2, battery pack 21, battery cell 211, explosion-proof valve 212, bus bar 22, circuit board 23, blister tray 24, tray through hole 241;

[0039] Temperature collection component 3;

[0040] Liquid cooling module 4, first liquid cooling plate 41, first tank body 411, first connecting surface 412, second liquid cooling plate 42;

[0041] Insulating block 5, buckle 51, pressure relief through hole 52, vertical plate 53, connecting plate 54, pressure relief channel 55, hot riveting column 56;

[0042] Buffer plate 6, edge 61;

[0043] Heat transfer area 7. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The core of the present invention is to provide a battery pack that can ensure the pressure relief capability of the explosion-proof valve on the battery module.

[0046] Specific embodiment 1 of the battery pack provided by the present invention, please refer to Figures 1 to 8, includes a battery module 2, a liquid cooling module 4, an insulating block 5 and a box body 1.

[0047] It should be noted that in the description of this embodiment, the X direction, the Y direction, and the Z direction are three directions that are perpendicular to each other. In addition, for the convenience of description, in this embodiment, the Z direction is specifically the height direction in space, and the two sides are the upper and lower directions respectively; in other embodiments, the Z direction may also be other directions in space, and the X direction, the Y direction, and the Z direction may also have other angular relationships.

[0048] As shown in FIG1 , the box body 1 includes a main box body 11 and a cover body 12 covering the top opening of the main box body 11. During assembly, the battery module 2, the liquid cooling module 4, and the insulating block 5 are placed in the main box body 11, and then the cover body 12 is covered on the top opening of the main box body 11.

[0049] As shown in FIG1 , the battery module 2 includes a battery pack 21 and a bus 22 disposed on the top of the battery pack 21. The battery pack 21 is composed of a plurality of battery cells 211, and the plurality of battery cells 211 in the battery pack 21 can be arranged side by side in a direction perpendicular to the up and down direction (X direction and / or Y direction), and can be arranged in an array. Each battery cell 211 has an explosion-proof valve 212 on the top. At this time, in the battery module 2, the explosion-proof valve 212 and the bus 2 are the structures at the top of the battery module 2.

[0050] As shown in FIG. 1 , the liquid cooling module 4 includes a first liquid cooling plate 41 and a second liquid cooling plate 42 , which are respectively located at the upper and lower sides of the battery module 2 to liquid-cool the battery module 2 from the upper and lower sides of the battery module 2 .

[0051] As shown in Figures 5 to 7, the insulating block 5 blocks the top of the battery cell 211, and the first liquid cooling plate 41 is located above the battery module 2 and the insulating block 5. A pressure relief through hole 52 is provided on the insulating block 5. Specifically, a plurality of pressure relief through holes 52 are provided, which are respectively provided corresponding to the positions of the explosion-proof valve 212. A pressure relief channel 55 is provided between the first liquid cooling plate 41 and the insulating block 5, and the explosion-proof valve 212 can exhaust air to the pressure relief channel 55 through the pressure relief through hole 52 to relieve pressure. A plurality of first layers of heat-conductive structural adhesives arranged at intervals along the Y direction are filled between the first liquid cooling plate 41 and the battery module 2, and the bus 22 contacts the first liquid cooling plate 41 through the first layer of heat-conductive structural adhesive for cooling.

[0052] Among them, the first layer of thermal conductive structural adhesive at each location covers the outer side surface of the corresponding insulating block 5, and the outer side surface refers to the portion of the outer surface of the insulating block 5 located between its top surface and bottom surface. Referring to Figure 5, it specifically refers to the outer surface y1 and / or y2 at both ends of the insulating block 5 in the Y direction.

[0053] In this embodiment, due to the addition of the insulating block 5, the area where the explosion-proof valve 212 of the battery cell 211 in the battery module 2 is located is blocked accordingly. When the thermal conductive structural adhesive is poured into the top of the battery module 2 to form the first layer of thermal conductive structural adhesive, due to the insulating block 5 having a certain height, the first layer of thermal conductive structural adhesive can be located side by side on the insulating block 5 under the blocking of the side of the insulating block 5, so as to prevent the first layer of thermal conductive structural adhesive from blocking the explosion-proof valve 212, and to prevent the first layer of thermal conductive structural adhesive from blocking the pressure relief through hole 52, so as to ensure that the explosion-proof valve 212 is smoothly opened and exhausted through the pressure relief through hole 52 when the battery cell 211 is thermally runaway. At the same time, since space is directly reserved between the first liquid cooling plate 41 and the insulating block 5 for the explosion-proof valve 212 to exhaust and relieve pressure, while ensuring sufficient exhaust space, the exhausted gas can be guided so that it can be exhausted to the set area, and directional exhaust and unified exhaust of each pressure relief through hole on the insulating block 5 are achieved. Among them, the thermal conductive structural adhesive is specifically a thermal conductive insulating adhesive.

[0054] As for the structural setting of the insulating block 5, as shown in Figures 4 to 7, the insulating block 5 includes a connecting plate 54 and two vertical plates 53 arranged in parallel on the top surface of the connecting plate 54, wherein the connecting plate 54 and the vertical plates 53 are connected at an angle, which is 90° in this embodiment, and can be 60°, 80° or other angles in other embodiments. The pressure relief through hole 52 is opened on the connecting plate 54, and the pressure relief through hole 52 is located between the two vertical plates 53. At least part of the space of the pressure relief channel 55 is located above the connecting plate 54 and between the two vertical plates 53. At this time, the two vertical plates 53 and the connecting plate 54 form a U-shaped groove, and the sides (surfaces in the Y direction) of the two vertical plates 53 that are away from each other can block the first layer of thermal conductive structural adhesive to prevent the thermal conductive structural adhesive from entering the top of the connecting plate 54 and blocking the pressure relief through hole 52. In addition, at this time, the first layer of thermally conductive structural adhesive covers the outer side surface of the insulating stopper 5, specifically refers to covering the outer side surface of the vertical plate 53 extending into the insulating stopper 5 and away from the other vertical plate 53. Based on this fitting relationship between the insulating stopper 5 and the first layer of thermally conductive structural adhesive, the top surface position of the first layer of thermally conductive structural adhesive after filling can be coordinated and controlled based on the top surface position of the insulating stopper 5, so that the top surface of the first layer of thermally conductive structural adhesive does not exceed the top surface of the insulating stopper 5 (mainly referring to the top surface of the vertical plate 53), and the coating thickness of the first layer of thermally conductive structural adhesive can be set with reference to the height of the insulating stopper 5. For example, the coating thickness of the first layer of thermally conductive structural adhesive can be consistent with the height of the insulating stopper 5 (mainly referring to the height of the vertical plate 53), or can be 2 / 3 of the height of the insulating stopper 5.

[0055] As shown in FIGS. 5 to 7 , the two vertical plates 53 are respectively located at the two ends of the connecting plate 54 in the Y direction to form a U-shaped plate, which has a simple structure and can be formed by bending. In other embodiments, the insulating block 5 can also be set to other structures, for example, the two vertical plates 53 are fixed to the middle of the top surface of the connecting plate 54.

[0056] Among them, the insulating block 5 can be a linear structure, specifically extending along the X direction. At this time, the connecting plate 54 and the vertical plate 53 are strip plates extending along the X direction, so as to guide the gas leaked from the explosion-proof valve 212 along the X direction. Specifically, as shown in Figures 2 and 5, the multiple battery cells 211 of the battery module 2 can be arranged in sequence along the X direction, and accordingly, the explosion-proof valves 212 in these battery cells 211 are also arranged in sequence along the X direction. The multiple pressure relief through holes 52 on the insulating block 5 are arranged in sequence along the X direction and respectively cooperate with each explosion-proof valve 212. In addition, a sealing plate can be provided at one or both ends of the insulating block 5 in the X direction.

[0057] In addition, there are multiple insulating blocks 5 to meet the exhaust and pressure relief requirements of the battery cells 211 at different positions. As shown in Figure 2, the insulating blocks 5 are arranged in sequence along the Y direction and have intervals to divide different heat-conducting areas 7 above the battery module 2, including the space between adjacent insulating blocks 5, and the space between the insulating blocks 5 at the end and the box body 1. The first layer of thermally conductive structural adhesive is distributed in different thermally conductive areas 7. At this time, different thermally conductive areas 7 are divided in the Y direction with the help of insulating blocks 5. In actual production, it is convenient to fill the first layer of thermally conductive structural adhesive in sequence, and the uniformity of thermal conductive adhesive coverage can be better guaranteed.

[0058] The insulating block 5 may be made of a plastic block or other insulating materials.

[0059] To ensure space for the pressure relief channel 55, as shown in FIG7, on the first liquid cooling plate 41, the bottom surface of the first liquid cooling plate 41 has a convex first groove 411 (that is, the surface of the first liquid cooling plate 41 facing the battery module 2 is concave along the Z direction and away from the insulating block 5), and the first groove 411 is covered above the insulating block 5. At this time, when the first layer of heat-conducting structural adhesive located on the side of the insulating block 5 is lower than the insulating block 5, it can ensure that the first liquid cooling plate 41 can be reliably connected to the first layer of heat-conducting structural adhesive. Of course, in other embodiments, the bottom surface of the first liquid cooling plate 41 can also be a plane.

[0060] As shown in FIG7 , the bottom of the first trough body 411 (the first trough body 411 is an upward convex structure, the bottom of the trough is the top surface of the first trough body 411, and the notch is located at the bottom end of the first trough body 411) can fit with the top surface of the vertical plate 53, so that the vertical plate 53 and the first trough body 411 are in contact, so that the insulating block 5 provides support for the first liquid cooling plate 41 and improves the strength of the first liquid cooling plate 41; a certain gap can also be provided. In addition, part of the structure of the first liquid cooling plate 41 can be bent upward as a whole, and the bottom forms the first trough body 411, or the first trough body 411 can be directly processed on the bottom surface of the first liquid cooling plate 41.

[0061] As shown in FIG7 , on the bottom surface of the first liquid cooling plate 41 (i.e., the surface of the first liquid cooling plate 41 facing the battery module 2), except for the first tank body 411, the other parts may be the first connection surface 412 docked with the notch at the bottom of the first tank body 411. The first connection surface 412 may be a plane coplanar with the notch of the first tank body 411. Specifically, the spacing between the bottom of the first tank body 411 and the top surface of the battery module 2 is h1, and the spacing between the first connection surface 412 and the top surface of the battery module 2 is h2 (h2>h1). In other embodiments, the first connection surface 412 may also be provided with a concave-convex structure as required. At this time, the first connection surface 412 is used to fit the top surface of the first layer of heat-conducting structural adhesive, which is located above the bus bar 22 and other structures at the top of the battery module 2, and is thermally connected to the bus bar 22.

[0062] Among them, the insulating block 5 is located in the middle of the first slot body 411, specifically in the middle of the first slot body 411 in the Y direction, that is, the width of the insulating block 5 (the dimension in the Y direction) is smaller than the width of the first slot body 411 (the dimension in the Y direction). At this time, when the first liquid cooling plate 41 covers the battery module 2 and the insulating block 5, collision between the first slot body 411 and the insulating block 5 can be avoided; at the same time, more first layer of thermal conductive structural adhesive can be accommodated between the slot side surface of the first slot body 411 and the outer side surface of the insulating block 5, which can further improve the uniformity of glue coating.

[0063] Of course, in another embodiment, if Figures 10 to 12 In the embodiment shown, a buffer plate 6 is further sandwiched between the bottom of the first slot body 411 and the top surface of the insulating block 5. Specifically, a buffer foam can be selected, and at least part of the pressure relief channel 55 is located between the buffer plate 6 and the insulating block 5. At this time, the buffer plate 6 can be added to the gap between the first liquid cooling plate 41 and the insulating block 5 to provide support force and buffer the force on the first liquid cooling plate 41.

[0064] At this time, specifically, the buffer plate 6 is a cover-shaped body with an edge 61 at the bottom, and the edge is buckled on the top outer side of the outer side of the insulating stopper 5, such as Fig.10 and Fig.12 As shown, the insulating block 5 is a positive U-shaped structure formed by two vertical plates 53 and a connecting plate 54. Correspondingly, the buffer plate 6 is an inverted U-shaped cover body that is buckled on the top of the insulating block 5. At this time, the two edges 61 of the buffer plate 6 are respectively attached to the outer sides of the two vertical plates 53 in the Y direction.

[0065] Based on the covering and shielding effect of the buffer plate 6, the first layer of heat-conducting structural adhesive can be effectively prevented from overflowing onto the connecting plate 54 between the two vertical plates 53. At this time, the first layer of heat-conducting structural adhesive extends from the top of the battery module 2 to the outer side surface of the insulating block 5 and / or the outer side surface of the buffer plate 6. In addition, the buffer plate 6 can limit the first liquid cooling plate 41 and the insulating block 5 in the up and down directions. If the buffer plate 6 is directly fixedly connected to the first liquid cooling plate 41 by bonding or other methods, the buffer plate 6 can also limit the first liquid cooling plate 41 and the insulating block 5 in some directions perpendicular to the up and down directions (for example, the Y direction).

[0066] To realize the assembly of the insulating block 5, as shown in FIG2 and FIG6, a partition 13 is provided in the box body 1, a battery module 2 is provided on at least one side of the partition 13 in the box body 1, and the insulating block 5 is fixedly connected to the partition 13 through a connecting structure. The partition 13 can be used to position the battery module 2 in the box body 1, and at the same time, the partition 13 is fixedly connected to the insulating block 5, so that the multifunctionality of the partition 13 can be realized.

[0067] Among them, multiple and / or different direction partitions 13 can be set in the box body 1 to improve the stability of placing different battery modules 2 in the box body 1. As shown in Figure 2, a partition 13 extending along the X direction and a partition 13 extending along a direction perpendicular to the X direction (specifically the Y direction) are set in the main box body 11. The middle parts of the two partitions 13 are connected to form a cross-shaped structure, and a battery module 2 is placed in each of the four divided areas. At this time, the explosion-proof valves 212 on each battery module 2 arranged in a straight line along the X direction can be exhausted through the corresponding pressure relief through holes 52 on the same insulating block 5.

[0068] As shown in FIG6 , a buckle 51 is provided at the bottom of the insulating block 5, and a slot 131 is provided on the top surface of the partition 13. The positioning and fixed connection between the insulating block 5 and the partition 13 are achieved by the engagement of the buckle 51 and the slot 131. The buckle 51 may have a certain elasticity. In other embodiments, the insulating block 5 and the partition 13 or other positions on the box body 1 may also be bonded or otherwise bonded. In addition, the insulating block 5 and the battery module 2 may only be in contact and pressed but not directly connected, or may be bonded or otherwise bonded to strengthen the connection.

[0069] Alternatively, in other embodiments, the insulating block 5 may also be assembled in other ways. Fig. 9 The battery module 2 further includes a blister tray 24 fixed above the battery pack 21, and the blister tray 24 integrates at least part of the electrical signal acquisition components of the battery module 2, specifically forming a CCS module. The electrical signal acquisition components may include a bus 22, a circuit board 23, etc., and the circuit board 23 may be an FPC, an FFC, a PCB, etc.

[0070] At this time, specifically, a tray through hole 241 is provided on the blister tray 24, the insulating block 5 is fixed above the blister tray 24, and the explosion-proof valve 23 exhausts air to the pressure relief through hole 52 through the tray through hole 241, then the insulating block 5 can be assembled in one piece with the blister tray 24 in the box body 1, which is helpful to reduce the assembly steps. Among them, the insulating block 5 can be riveted and fixed to the blister tray 24 by hot riveting. In other embodiments, it can also be fixed to the blister tray 24 by bonding, clamping, etc.

[0071] To achieve exhaust and pressure relief of the pressure relief channel 55, as shown in FIG1 , the housing 1 includes a first mounting groove 113 and a second mounting groove 114, the battery module 2 is disposed in the first mounting groove 113, and the outlet of the pressure relief channel 55 is connected to the second mounting groove 114. At this time, the pressure relief channel 55 can exhaust and relieve pressure in the direction of the second mounting groove 114, making full use of the space in the housing 1 and relieving the pressure in the pressure relief channel 55. The second mounting groove 114 can be provided with other structures as needed, such as a high-pressure control member.

[0072] Among them, a box explosion-proof valve can be additionally provided on the box 1 to exhaust the gas outward through the box explosion-proof valve in a timely manner. In other embodiments, the outlet of the pressure relief channel 55 can be directly connected to the box explosion-proof valve for exhaust.

[0073] To facilitate the connection of the first liquid cooling plate 41, the top surface of the first mounting groove 113 is higher than the top surface of the bus 22. At this time, after the thermal conductive structural adhesive is poured into the top of the first mounting groove 113 to form a first layer of thermal conductive structural adhesive, the first layer of thermal conductive structural adhesive can be prevented from overflowing from the first mounting groove 113 where the battery module 2 is located.

[0074] As shown in FIG2 , the box body 1 includes two side beams 111 and two cross beams 112 respectively connected to the two side beams 111. The first mounting groove 113 is formed in the area surrounded by the two side beams 111 and the two cross beams 112. The top surface of the first mounting groove 113 is higher than the top surface of the bus 22. Specifically, the top surfaces of the two side beams 111 and the two cross beams 112 are higher than the top surface of the bus 22. Specifically, the side beams 111 extend along the X direction, and the cross beams 112 extend along a direction perpendicular to the X direction.

[0075] As shown in FIG. 2 , the first mounting groove 113 and the second mounting groove 114 may be divided by a crossbeam 112 , and the partition 13 is located in the first mounting groove 113 , and the partition 13 divides the space in the first mounting groove 113 to position different battery modules 2 .

[0076] In order to improve the heat dissipation capacity, the gap between the battery module 2 and the box body 1, and / or the gap between the first liquid cooling plate 41 and the box body 1 is provided with a gap thermal conductive structural adhesive, so that the first liquid cooling plate 41 and / or the battery module 2 can transfer heat to the box body 1 through the gap thermal conductive structural adhesive to improve the heat dissipation capacity. During the assembly process, after the battery module 2 is placed in the first mounting groove 113 in the main box 11, thermal conductive structural adhesive is poured from the top of the first mounting groove 113, and part of the thermal conductive structural adhesive enters the gap between the battery module 2 and the box 1 to form part of the gap thermal conductive structural adhesive, and the thermal conductive structural adhesive that stays and covers the top of the battery module 2 (including the top surface of the bus 22 and the top surface of the battery cell 211, excluding the top surface of the insulating block 5) includes a first layer of thermal conductive structural adhesive to connect the first liquid cooling plate 41. After the first liquid cooling plate 41 is installed on the first layer of thermal conductive structural adhesive, part of the thermal conductive structural adhesive may enter the gap between the first liquid cooling plate 41 and the box 1 under extrusion, forming another part of the gap thermal conductive structural adhesive.

[0077] To further improve the heat dissipation capability, the side beams 111 and / or cross beams 112 are metal parts, such as aluminum profiles. Metal materials dissipate heat faster, and combined with gap heat-conducting structural adhesive, lateral cooling can be achieved more effectively.

[0078] The second liquid cooling plate 42 is connected to the bottom surface of the battery module 2 through the second layer of heat-conducting structural adhesive to ensure that the heat from the bottom of the battery module 2 can be smoothly dissipated to the second liquid cooling plate 2 through the second layer of heat-conducting structural adhesive. In addition, the upper and lower sides of the battery module 2 are cooled and dissipated through the first liquid cooling plate 41 and the second liquid cooling plate 42 respectively, which can improve the cooling rate and meet the high-rate fast charging requirements of the battery pack. In addition, the second liquid cooling plate 42 is welded to the main box 11 as a whole.

[0079] In order to improve the controllability of the temperature of the battery module, as shown in FIG8 , the battery pack further includes a temperature collection member 3. Since the top surface of the battery cell 211 is close to the first liquid cooling plate 41, the cooling effect is better than the side surface, so the side temperature of the battery cell 211 is closer to the real temperature of the battery cell 211. In this embodiment, the temperature collection member 3 is connected to the side of the battery module 2. The temperature collection member 3 is mainly used to collect the temperature of the side of the battery cell 211, which can more truly reflect the temperature of the battery module 2.

[0080] Among them, the battery module 2 also includes a circuit board 23, the temperature collection component 3 is electrically connected to the circuit board 23, and the temperature collected by the temperature collection component 3 can be transmitted to the control module through the circuit board 23. The circuit board 23 is arranged on the top of the battery pack and is located on the first liquid cooling plate 41. Specifically, the circuit board 23 can be arranged in parallel on the side of the insulating block 5, and the circuit board 23 can specifically extend along the X direction. In addition, in order to meet the data transmission requirements, the insulating block 5 can be provided with circuit boards 23 on both sides in the direction perpendicular to the X direction.

[0081] The battery pack in this embodiment has the following beneficial effects: the first liquid cooling plate 41 and the lower cold plate are used to liquid cool the upper and lower sides of the battery module 2, and the glue is fully injected from the top of the battery module 2. The heat on the top and side surfaces of the battery module 2 is dissipated through the first liquid cooling plate 41, the second liquid cooling plate 42 and the cross beam 112 and the side beam 111 of the box 1 by the thermal conductive structural glue, which can effectively achieve the cooling of the battery cell 211, and the side beam 111 and the cross beam 112 of the box 1 are made of metal parts, which ensures the current market demand for high-rate fast charging. In addition, by adding an insulating block 5, the explosion-proof valve 212 can be prevented from being covered by the thermal conductive structural glue, so that the exhaust can be smoothly discharged through the pressure relief through hole 52 of the insulating block 5 and the pressure relief channel 55 between the first liquid cooling plate 41 and the insulating block 5.

[0082] It should be noted that when an element is referred to as "fixed" to another element, it may be directly on the other element or there may be an element in the middle. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an element in the middle. In addition, in the description of the present invention, unless otherwise specified, "multiple", "multiple roots", "multiple groups" mean two or more.

[0083] The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0084] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0085] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0086] The battery pack provided by the present invention is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A battery pack, characterized in that: Comprising a battery module (2), a first liquid cooling plate (41) and an insulating block (5); The battery module (2) comprises a plurality of battery cells (211) arranged in an array, each of the battery cells (211) having an explosion-proof valve (212) on one side along the Z direction, the insulating block (5) extending along the X direction, and the insulating block (5) shielding one side of the explosion-proof valve (212) in the Z direction, and the insulating block (5) is provided with a plurality of pressure relief through holes (52) corresponding to the position of the explosion-proof valve (212); The first liquid cooling plate (41) is arranged on one side of the battery module (2) and the insulating block (5) along the Z direction, a pressure relief channel (55) is provided between the first liquid cooling plate (41) and the insulating block (5), and the explosion-proof valve (212) can exhaust air to the pressure relief channel (55) through the pressure relief through hole (52); A plurality of first layers of thermally conductive structural adhesives arranged at intervals along the Y direction are filled between the first liquid cooling plate (41) and the battery module (2), and the first layers of thermally conductive structural adhesives cover the outer surface of the insulating block (5) in the Y direction.

2. The battery pack according to claim 1, characterized in that: The insulating stopper (5) comprises a connecting plate (54) and two vertical plates (53) respectively connected to both sides of the connecting plate (54) along the Y direction, the vertical plates (53) and the connecting plate (54) being arranged in sequence in a direction close to the battery module (2) along the Z direction, and the pressure relief through hole (52) is provided on the connecting plate (54).

3. The battery pack according to claim 2, characterized in that: The first liquid cooling plate (41) has a first groove body (411) which is recessed along the Z direction and away from the insulating block (5), the first groove body (411) is covered by the insulating block (5), and the vertical plate (53) is in contact with the first groove body (411); at least part of the pressure relief channel (55) is formed between the insulating block (5) and the first groove body (411).

4. The battery pack according to claim 3, characterized in that: A buffer plate (6) is further provided between the bottom of the first slot body (411) and the insulating block (5), and at least part of the pressure relief channel (55) is formed between the buffer plate (6) and the insulating block (5).

5. The battery pack according to claim 1, characterized in that: The plurality of insulating blocks (5) are arranged at intervals along the Y direction to divide different heat-conducting areas (7) in the battery module (2); and the first layer of heat-conducting structural adhesive is distributed in different heat-conducting areas (7).

6. The battery pack according to any one of claims 1 to 5, characterized in that: The invention also comprises a box body (1), wherein a partition plate (13) is arranged in the box body (1), wherein the battery module (2) is arranged in the box body (1) on at least one side of the partition plate (13) in the X direction and / or at least one side of the Y direction, and wherein the insulating block (5) is fixedly connected to one side of the partition plate (13) along the Z direction via a connecting structure.

7. The battery pack according to any one of claims 1 to 5, characterized in that: It also comprises a blister tray (24) fixed to one side of the battery module (2) along the Z direction, the blister tray (24) having at least part of the electrical signal collection components of the battery module (2) integrated thereon; the blister tray (24) is provided with a tray through hole (241), the insulating block (5) is connected to a side of the blister tray (24) away from the battery module (2) along the Z direction, and the explosion-proof valve (212) exhausts air to the pressure relief through hole (52) through the tray through hole (241).

8. The battery pack according to any one of claims 1 to 5, characterized in that: It also includes a box body (1), wherein the box body (1) includes a first installation groove (113) and a second installation groove (114); The battery module (2) is arranged in the first mounting groove (113), and the battery module (2) further comprises a bus bar (22), the bus bar (22) being located on a side of the battery cell (211) close to the first liquid cooling plate (41) in the Z direction, the notch of the first mounting groove (113) protruding from a surface of the bus bar (22) away from the battery cell (211) in the Z direction, and the outlet of the pressure relief channel (55) is connected to the second mounting groove (114).

9. The battery pack according to any one of claims 1 to 5, characterized in that: It also comprises a box body (1), wherein the first liquid cooling plate (41) and the battery module (2) are arranged in the box body (1); A gap between the battery module (2) and the box (1), and / or a gap between the first liquid cooling plate (41) and the box (1) has a gap heat-conducting structural adhesive; and / or further comprising a second liquid cooling plate (42) arranged in the box (1), the second liquid cooling plate (42) being connected to the battery module (2) via a second layer of heat-conducting structural adhesive, the first liquid cooling plate (41) and the second liquid cooling plate (42) being located on both sides of the battery module (2) in the Z direction.

10. The battery pack according to any one of claims 1 to 5, characterized in that: It also comprises a temperature collection component (3), wherein the temperature collection component (3) is connected to the surface of the battery module (2) in the X direction and / or the Y direction.

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