CN114976458A

CN114976458A - Battery pack

Info

Publication number: CN114976458A
Application number: CN202210691718.4A
Authority: CN
Inventors: 邱文聪; 李凡; 陈智伟; 陈朝海
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2022-06-17
Filing date: 2022-06-17
Publication date: 2022-08-30

Abstract

The invention belongs to the technical field of batteries and discloses a battery pack. This battery package includes a plurality of electric cores, and this battery package still includes box and a plurality of battery module. A supporting beam is arranged in the box body, the supporting beam divides the interior of the box body into a plurality of compartments, a communication channel is arranged between the bottom of the supporting beam and the inner bottom surface of the box body, and the communication channel communicates two adjacent compartments. The battery module is arranged in the separation bin. When the battery core in the battery pack is out of control due to heat, high-temperature gas can be dispersed in time, so that the battery pack has higher safety performance.

Description

Battery pack

Technical Field

The invention relates to the technical field of batteries, in particular to a battery pack.

Background

With the continuous development of high-tech industry, the application of power batteries is more and more extensive. Safety performance of power batteries is one of the important issues of user concern. For a lithium ion battery, the thermal runaway of a battery core is the most serious safety accident, and the reasons for the thermal runaway are many, for example, short circuit caused by internal defects of the battery or excessive heat accumulation in the battery caused by external short circuit of the battery, and the like.

If the high-temperature gas generated after thermal runaway cannot be discharged in time, the danger such as battery fire or even explosion is easily caused. Therefore, how to avoid the fire or explosion of the battery caused by the high-temperature gas generated by the thermal runaway of the battery cell is a key issue to be considered in the design of the battery structure. Among the prior art, the mode that sets up the guide way in the bottom of box and set up the relief valve at the lateral wall of box is usually adopted and is carried out the pressure release, and high-temperature gas can follow guide way flow direction relief valve, nevertheless because guide way has restricted high-temperature gas's diffusion range, and accumulated high-temperature gas makes local high temperature in the box easily in the relief channel, and the effect of pressure release cooling is relatively poor.

Therefore, it is desirable to provide a battery pack to solve the above problems.

Disclosure of Invention

The invention aims to provide a battery pack, which has higher safety performance because high-temperature gas can be dispersed in time when a battery core in the battery pack is out of control due to heat.

In order to achieve the purpose, the invention adopts the following technical scheme:

a battery pack comprising a plurality of cells, the battery pack further comprising:

the device comprises a box body, wherein a supporting beam is arranged in the box body and divides the interior of the box body into a plurality of compartments, a communication channel is arranged between the bottom of the supporting beam and the inner bottom surface of the box body and communicates two adjacent compartments;

at least two battery module, the battery module sets up in the compartment.

Optionally, a cushion block is arranged on the inner bottom surface of the box body, and the support beam is arranged on the cushion block to form the communication channel.

Optionally, a pressure relief opening is arranged on a side wall of the box body.

Optionally, be provided with the boundary beam on the lateral wall of box, the boundary beam has the pressure release passageway that both ends link up, the pressure release mouth with pressure release passageway intercommunication, the high-temperature gas that electric core thermal runaway produced can loop through the compartment the pressure release mouth with pressure release passageway discharges the outside of box.

Optionally, an electrical cavity is arranged in the box, the battery pack further comprises a maintenance upper cover, and the maintenance upper cover is covered on the electrical cavity and connected with the box.

Optionally, the battery module comprises a tray, the battery cell is arranged on the tray, a pressure relief hole is formed in the bottom of the tray, and high-temperature gas generated by thermal runaway of the battery cell can be discharged into the separation bin through the pressure relief hole.

Optionally, a support is arranged on the tray, the battery cell is placed on the support, a plurality of through holes are formed in the support, and high-temperature gas generated by thermal runaway of the battery cell can be discharged into the separation bin through the through holes and the pressure relief holes in sequence.

Optionally, the battery module further includes a structural adhesive, the bracket is provided with an adhesive overflow hole, the adhesive overflow hole is opposite to the gap between the adjacent battery cores, an adhesive injection space is provided between the tray and the bracket, and the structural adhesive can be filled in the gap, the adhesive overflow hole and the adhesive injection space.

Optionally, the support is provided with a plurality of ribs, the ribs are arranged towards the tray, and the ribs are used for increasing the contact area between the structural adhesive and the support.

Optionally, a plurality of positioning portions are arranged on the support, a plurality of placing portions are arranged on the bottom surface of the support, positioning grooves are formed by the positioning portions and the placing portions, the through holes are formed in the bottom of the placing portions, and the battery cell is arranged in the positioning grooves.

Optionally, the bottom of the placing part is provided with a plurality of annular ribs, the annular ribs are arranged in contact with the tray, and two ends of each annular rib are respectively communicated with the through hole and the pressure relief hole.

Optionally, the positioning portion includes a plurality of positioning blocks, and the plurality of positioning blocks are arranged at intervals along the periphery of the placing portion.

Optionally, a groove is arranged on the side surface of the positioning block.

Optionally, the thickness of the top of the positioning block is smaller than that of the bottom.

Optionally, the battery module further includes a fixing frame, the fixing frame is disposed at the top of the battery core, a plurality of positioning protrusions are disposed on the fixing frame, and the positioning protrusions extend into the gaps between two adjacent battery cores and are in contact with the side surfaces of the battery cores.

Optionally, the battery module further includes a busbar, a mounting hole is further formed in the fixing frame, the busbar is embedded into the mounting hole, and the busbar is in contact with the battery cells and electrically connects the battery cells.

Optionally, the busbar includes a positive electrode connecting portion and a negative electrode connecting portion, the mounting hole includes a positive electrode mounting hole and a negative electrode mounting hole, the positive electrode connecting portion passes through the positive electrode mounting hole and the positive electrode electrical connection of the electric core, the negative electrode connecting portion passes through the negative electrode mounting hole and the negative electrode electrical connection of the electric core.

Optionally, a positioning hole is formed in the busbar, and a positioning column is arranged on the fixing frame and penetrates through the positioning hole.

Optionally, the battery module further includes a heat-conducting adhesive, and the heat-conducting adhesive is disposed on the end surfaces of the fixing frame and the bus bar and can bond the fixing frame and the bus bar.

Optionally, be provided with the mounting groove on the mount, the busbar sets up in the mounting groove, the mounting hole sets up the tank bottom of mounting groove, the side of busbar with the tank bottom of mounting groove reaches the lateral wall of mounting groove forms and stores up gluey groove, it can hold to store up gluey groove the heat-conducting glue.

Optionally, a glue passing hole is formed in the fixing frame, the glue passing hole is located at the top end of the battery cell, and the heat conducting glue can be filled in the glue passing hole and is in contact with the top end of the battery cell.

Has the advantages that:

the battery pack provided by the invention has the advantages that the support beam is arranged to divide the interior of the box body into a plurality of compartments, the battery modules are placed in the compartments, and the bottom of the support beam and the inner bottom surface of the box body are provided with the communication channel, so that the adjacent compartments are communicated with each other. When electric core in certain battery module takes place thermal runaway, the high temperature gas of its production can be through intercommunication passageway to other compartment diffusion to avoid the heat to concentrate, play the effect of cooling, effectively avoid danger such as battery package explosion, improved the security performance of battery package.

Drawings

FIG. 1 is a first schematic structural diagram of a box provided by the present invention;

FIG. 2 is a second schematic structural diagram of the case provided by the present invention;

fig. 3 is an exploded view of a battery pack provided by the present invention;

fig. 4 is an exploded view of a battery module provided in the present invention;

FIG. 5 is a first schematic structural view of a stent provided by the present invention;

FIG. 6 is a second schematic structural view of a stent according to the present invention;

FIG. 7 is a schematic structural view of a fixing frame provided by the present invention;

fig. 8 is an assembly view of the bus bar and the fixing bracket according to the present invention.

In the figure:

10. an electric core; 100. a box body; 110. a support beam; 120. a side beam; 130. cushion blocks; 140. a pressure relief port; 150. a boundary beam; 151. a pressure relief channel; 160. maintaining the upper cover; 170. a liquid cooling upper cover; 171. a coolant passage; 180. a sealing strip; 190. layering; 200. a battery module; 210. a tray; 211. a pressure relief vent; 220. a support; 221. a through hole; 222. glue overflow holes; 223. a rib; 224. an annular rib; 225. positioning blocks; 226. a placement section; 230. structural adhesive; 240. a fixed mount; 241. positioning the projection; 242. a positive mounting hole; 243. a negative mounting hole; 244. a positioning column; 245. passing through a glue hole; 250. a bus bar; 251. a positive electrode connecting part; 252. a negative electrode connecting part; 253. a substrate; 260. heat-conducting glue; 261. glue storage tank.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

Referring to fig. 1, the present embodiment provides a battery pack, which includes a plurality of battery cells 10, a case 100, and a plurality of battery modules 200. The inside of the box body 100 is provided with a supporting beam 110, the supporting beam 110 divides the inside of the box body 100 into a plurality of compartments, a communication channel is arranged between the bottom of the supporting beam 110 and the inner bottom surface of the box body 100, and the communication channel is used for communicating two adjacent compartments. The battery module 200 is disposed in the compartment.

The battery pack is provided with the support beam 110 to divide the interior of the case 100 into a plurality of compartments for accommodating the battery modules 200, and the bottom of the support beam 110 and the inner bottom surface of the case 100 are provided with a communication channel, so that the adjacent compartments are communicated with each other. When electric core 10 in certain battery module 200 takes place the thermal runaway, the high-temperature gas of its production can be through intercommunication passageway to other compartment diffusion to avoid the heat to concentrate, play the effect of cooling, effectively avoid the battery package danger such as explosion, improved the security performance of battery package.

Referring to fig. 1, in the present embodiment, the support beams 110 are cross-shaped to divide the interior of the case 100 into four compartments, in which four battery modules 200 can be placed. The side members 120 are further disposed around the inside of the case 100, and end surfaces of the side members 120 are flush with end surfaces of the support beams 110, so that the side members 120 and the support beams 110 can support the battery module 200. The support beam 110 includes a cross beam and a longitudinal beam, the cross beam is disposed along a central axis of the box body 100 in the width direction, the longitudinal beam is disposed along a central axis of the box body 100 in the length direction, and the middle of the longitudinal beam is disconnected and connected to the cross beam.

Referring to fig. 2, a mat 130 is provided on the inner bottom surface of the cabinet 100, and the support beam 110 is provided on the mat 130. It will be appreciated that the spacers 130 are arranged to provide a space between the support beam 110 and the inner bottom surface of the casing 100, thereby forming a communication passage for communicating between the adjacent compartments. In the present embodiment, the plurality of spacers 130 are provided, the plurality of spacers 130 are spaced apart, and the number and the position of the spacers 130 are selected according to the arrangement of the support beam 110, which is not particularly limited herein. In other embodiments, the support beam 110 may be provided with a communication hole 221 for communicating adjacent compartments. Alternatively, the support beam 110 and the spacer 130 are connected by welding, but of course, bonding or connecting methods are also used. Optionally, the bottom plate and the side wall of the box 100 are connected by full welding, so as to ensure the structural strength.

Further, a pressure relief opening 140 is provided on a side wall of the tank 100 for releasing high temperature gas. Further, the outer side wall of the box 100 may further be provided with a side beam 150, the side beam 150 has a pressure relief channel 151 with two through ends, and the pressure relief port 140 is communicated with the pressure relief channel 151, so that high-temperature gas generated by thermal runaway of the battery cell 10 can sequentially pass through the compartment, the pressure relief port 140 and the pressure relief channel 151 and be discharged to the outside of the box 100. In this embodiment, the boundary beam 150 is located on the outer side wall of the box 100 in the length direction, and since the boundary beam 150 is long, the high-temperature gas flows through the pressure relief channel 151, the temperature is reduced, and the risk of explosion or fire of the battery pack is reduced.

Referring to fig. 3, an electrical chamber is formed inside the case 100, and the battery pack further includes a maintenance cover 160, and the maintenance cover 160 is covered on the electrical chamber and connected to the case 100. To ensure the sealing of the electrical chamber, a sealing strip 180 may be provided between the maintenance cover 160 and the cabinet 100. In the use process of the battery pack, the electrical element is more prone to have problems than the battery module 200, therefore, the electrical chamber is sealed by the maintenance upper cover 160 alone, when the electrical element breaks down, only the maintenance upper cover 160 is detached, maintenance is convenient, and operation cost is low. The battery pack also includes a liquid cooled upper cover 170, and the liquid cooled upper cover 170 covers the compartment and is connected to the case 100. The liquid-cooled upper cover 170 can enclose the battery module 200 in the compartment. Alternatively, the connection strength may be increased by providing the bead 190. Optionally, the liquid cooling upper cover 170 is provided with a cooling liquid channel 171, and a cooling liquid is provided in the cooling liquid channel 171, so as to cool the battery module 200. By adopting the structure, the liquid cooling plate and the box cover in the traditional battery structure are integrated, the number of parts is reduced, the overall cost is reduced, the assembly efficiency can be improved, and the overall structure is more compact.

Further, referring to fig. 4, the battery module 200 includes a tray 210, the battery cell 10 is disposed on the tray 210, a pressure relief hole 211 is disposed at the bottom of the tray 210, and high-temperature gas generated by thermal runaway of the battery cell 10 can be discharged into the compartment through the pressure relief hole 211. The tray 210 is made of metal and has sufficient structural strength. Tray 210 mainly includes the bottom plate and the curb plate of being connected perpendicularly with the bottom plate, and pressure release hole 211 sets up on the bottom plate, and the position of pressure release hole 211 sets up according to electric core 10's arrangement, guarantees that both are just setting up to can make high-temperature gas discharge rapidly. Further, flanges are connected to edges of the side plates, and when the battery module 200 and the case 100 are assembled, the flanges are erected on the support beams 110 or the side beams 120, and the flanges can be locked to the case 100 by screws.

Further, a bracket 220 is arranged on the tray 210, the battery is placed on the bracket 220, a plurality of through holes 221 are formed in the bracket 220, and high-temperature gas generated by thermal runaway of the battery cell 10 can be discharged into the compartment through the through holes 221 and the pressure relief holes 211 in sequence. In the present embodiment, the through hole 221, the pressure relief hole 211 and the battery cell 10 are uniformly and oppositely disposed. The bracket 220 is made of plastic or other materials with good insulating property, and can insulate and isolate the battery cell 10 from the tray 210, so as to prevent the battery cell 10 and the tray from short circuit.

The battery module 200 further comprises a structural adhesive 230, the bracket 220 is provided with an adhesive overflow hole 222, the adhesive overflow hole 222 is arranged right at the gap between the adjacent battery cores 10, an adhesive injection space is arranged between the tray 210 and the bracket 220, and the structural adhesive 230 can be filled in the gap, the adhesive overflow hole 222 and the adhesive injection space, so that the battery cores 10, the bracket 220 and the tray 210 are bonded together. Besides the function of fixing and connecting, the structural adhesive 230 can also play an insulating role, so as to prevent the short circuit caused by the contact of the adjacent battery cells 10.

Referring to fig. 4 and 5, further, a positioning portion is provided on the bracket 220, the bottom surface of the bracket 220 has a plurality of placing portions 226, the positioning portion and the placing portions 226 form a positioning groove, the through hole 221 is provided at the bottom of the placing portion 226, and the battery cell 10 is disposed in the positioning groove. In this embodiment, since the battery cell 10 is cylindrical and the through hole 221 is circular, the placing portion 226 has a ring shape, and the positioning portion is disposed on the outer periphery of the placing portion 226. After the placement portions 226 are spliced, the tangent portions of the placement portions are connected together, and the unconnected portions form the glue overflow holes 222. In the present embodiment, the glue overflow hole 222 is substantially triangular according to the shape of the gap between the battery cells 10, and the through hole 221 is set to be circular according to the shape of the battery cells 10, and in other embodiments, the shapes of the glue overflow hole 222 and the through hole 221 are not limited thereto.

Further, the positioning portion includes a plurality of positioning blocks 225, and the plurality of positioning blocks 225 are disposed at intervals. Two sides of the positioning block 225 are both arc-shaped surfaces, and the two arc-shaped surfaces are respectively arranged towards two different battery cores 10. In other embodiments, the positioning portion may also be a cylindrical structure disposed at the periphery of the placing portion 226 and extending toward the top of the battery cell 10, or a plurality of arc-shaped plate-shaped structures disposed along the periphery of the positioning portion, and any structural form that can perform a positioning function on the battery cell 10 is within the scope of the present application.

Further, a positioning block 225 is provided at a junction of the adjacent placing portions 226. In the present embodiment, as for the placement portions 226 in the middle of the bracket 220, six placement portions 226 are connected around each placement portion 226, and therefore, six positioning blocks 225 are provided on the outer circumference of the placement portions 226. In other embodiments, the number of the positioning blocks 225 is not limited to six, and may be three, five or other numbers, and the positions of the positioning blocks 225 are not limited to the joints of the adjacent placing portions 226, and the specific form may be set according to the arrangement manner of the battery cells 10.

Optionally, the top of the locating block 225 has a thickness less than the thickness of the bottom, and the top has a width less than the width of the bottom. To the battery module 200 structure that needs to glue 230 at electric core 10 bottom filling structure, locating piece 225 adopts this kind to go up thin thick down, and go up narrow wide structure down, can increase the area of contact between structure glue 230 and the locating piece 225 and between structure glue 230 and electric core 10, makes the bonding more firm, and electric core 10 and support 220 are difficult not hard up, can make the drawing of patterns of support 220 more convenient moreover, reduce the manufacturing difficulty. Optionally, a groove may be disposed on a side surface of the positioning block 225, and the groove may accommodate the structural adhesive 230, in this embodiment, grooves are disposed on two side surfaces of the positioning block 225, and each groove is a V-shaped groove, so that a creepage distance can be increased, electrical safety is ensured, an adhesive area is increased, and grouping strength is increased. In order to further increase the adhesive area, in this embodiment, the diameter of the circle surrounded by the bottom of the positioning block 225 is slightly larger than the diameter of the bottom of the battery cell 10, and the difference between the diameters of the two is in a range of 0.1 to 0.4mm, which may be, for example, 0.1mm, 0.2mm, 0.3mm, or 0.4 mm. In other embodiments, the bottom of the positioning portion may also be in contact with the bottom of the battery cell 10, so as to clamp the battery cell 10 into the positioning portion.

Referring to fig. 6, a plurality of ribs 223 are formed on the bracket 220, and the ribs 223 are formed toward the tray 210, so that the contact area between the structural adhesive 230 and the bracket 220 can be increased, thereby increasing the firmness of the bonding. In this embodiment, the rib 223 is annular, the rib 223 is disposed on the periphery of the placing portion 226, and is disposed concentrically with the through hole 221, in other embodiments, the rib 223 may also be a protrusion with a square, circular, arc or other shape, and any structural form that can increase the bonding area between the structural adhesive 230 and the bracket 220 is within the protection scope of the present application.

With continued reference to fig. 6, the bottom of the placing portion 226 is provided with a plurality of annular ribs 224, the annular ribs 224 are disposed in contact with the tray 210, and both ends of the annular ribs 224 are respectively communicated with the through holes 221 and the pressure relief holes 211. The ring rib 224 plays a supporting role between the bracket 220 and the tray 210, optionally, the ring rib 224 is disposed at an inner ring of the placing portion 226, so that a certain interval exists between the adjacent ring ribs 224, and the ring rib 224 has a certain height, thereby forming a glue injection space between the bracket 220 and the tray 210, the structural glue 230 can be filled in the glue injection space, and simultaneously, the pressure relief hole 211 and the through hole 221 are communicated, when a certain electrical core 10 is in thermal runaway, high-temperature gas generated by the electrical core 10 can rapidly pass through the through hole 221 and overflow from the pressure relief hole 211 along the ring rib 224, thereby effectively preventing the high-temperature gas from spreading to the bottoms of other electrical cores 10, and increasing the risk of thermal runaway of other electrical cores 10.

Referring to fig. 7, the battery module 200 further includes a fixing frame 240, the fixing frame 240 is disposed at the top of the battery cell 10, a plurality of positioning protrusions 241 are disposed on the fixing frame 240, and the positioning protrusions 241 extend into the gap between adjacent battery cells 10 and contact with the side surfaces of the battery cells 10. By providing a plurality of positioning protrusions 241 on one side of the fixing frame 240, when assembling the fixing frame 240 and the battery cells 10, the positioning protrusions 241 are inserted into gaps between adjacent battery cells 10. The shape of the positioning protrusion 241 is set according to the gap between the adjacent battery cells 10, so that the positioning protrusion 241 can contact with the side surface of the battery cell 10, thereby limiting the position of the battery cell 10 and preventing the short circuit caused by the contact of the battery cell 10.

Referring to fig. 7 and 8, the battery module 200 further includes a bus bar 250, and a mounting hole is further formed in the fixing frame 240, the bus bar 250 is embedded in the mounting hole, and the bus bar 250 is in contact with the battery cells 10 and electrically connects the battery cells 10. The bus bar 250 is embedded in the mounting hole, so that the connection stability of the bus bar 250 and the battery cell 10 can be improved.

With continued reference to fig. 8, the busbar 250 includes a positive electrode connection portion 251 and a negative electrode connection portion 252, the mounting holes include a positive electrode mounting hole 242 and a negative electrode mounting hole 243, the positive electrode connection portion 251 is electrically connected to the positive electrode of the battery cell 10 through the positive electrode mounting hole 242, and the negative electrode connection portion 252 is electrically connected to the negative electrode of the battery cell 10 through the negative electrode mounting hole 243. Specifically, the bus bar 250 includes a plurality of bus bar cells each including a positive electrode connection portion 251 and a negative electrode connection portion 252, which are connected to each other by a base material 253. Set up positive pole mounting hole 242 and negative pole mounting hole 243 respectively, compare in being an organic whole with positive pole mounting hole 242 and negative pole mounting hole 243 intercommunication, can improve the reliability that electric core 10 is connected, effectively avoid because of busbar 250 dislocation or with the electric core 10 short circuit that the contact failure leads to of electric core 10, simultaneously, can increase the structural strength of mount 240.

The positioning holes are formed in the busbar 250, the positioning columns 244 are arranged on the fixing frame 240, and the positioning columns 244 penetrate through the positioning holes, so that the busbar 250 is positioned, and dislocation between the busbar 250 and the battery cell 10 is prevented. In the present embodiment, each of the bus bar units is provided with a positioning hole disposed between the positive electrode connecting portion 251 and the negative electrode connecting portion 252, and a positioning post 244 disposed between the positive electrode mounting hole 242 and the negative electrode mounting hole 243. It will be appreciated that the location and shape of the locating holes and locating posts 244 should be cooperatively configured. In other embodiments, the positioning posts 244 may also be disposed on the base 253 or the positive electrode connection portion 251 or the negative electrode connection portion 252.

Further, the battery module 200 further includes a thermal conductive adhesive 260, and the thermal conductive adhesive 260 is disposed on the end surfaces of the fixing frame 240 and the bus bar 250 and can bond the fixing frame 240 and the bus bar 250. The battery is at the charge-discharge in-process, and busbar 250 local heating is serious, and the setting of heat conduction glue 260 can be with the heat transfer of busbar 250 to the lower position of temperature, avoids the inside local high temperature of battery, causes potential safety hazards such as electric core 10 thermal runaway. In addition, the heat conducting glue 260 can bond the bus bar 250 and the bracket 220, and the rigidity and stability of the structure are increased.

Be provided with the mounting groove on the mount 240, busbar 250 sets up in the mounting groove, and the mounting hole sets up at the tank bottom of mounting groove, and the side of busbar 250 and the tank bottom of mounting groove and the lateral wall of mounting groove form and store up gluey groove 261, and it can be used for holding heat-conducting glue 260 to store up gluey groove 261. It can be understood that the cross-sectional area of the mounting groove is larger than that of the busbar 250, so that after the busbar 250 is placed in the fixing frame 240, a circle of gap exists around the busbar 250, and the gap is the glue storage groove 261. Alternatively, the height of the mounting groove is greater than the thickness of the bus bar 250, so that the heat conductive glue 260 can fill the surface of the bus bar 250, and the bus bar 250 is covered under the heat conductive glue 260, which can also improve the heat transfer effect and the firmness of the connection between the components.

Further, the fixing frame 240 is provided with a glue passing hole 245, the glue passing hole 245 is located at the top end of the battery cell 10, and the heat conducting glue 260 can be filled in the glue passing hole 245 and is in contact with the top end of the battery cell 10. The arrangement of the glue passing hole 245 enables the thermal conductive glue 260 to be in direct contact with part of the surface of the top end of the battery cell 10, so that heat generated by the battery cell 10 can be directly transferred, the heat of the battery cell 10 is rapidly reduced, and the safety of the battery cell 10 is ensured. In this embodiment, the shape of the glue passing hole 245 may be set according to the shape of the bus bar 250, and the area thereof should be large enough, but at the same time, the bracket 220 should have enough structural strength. In other embodiments, the glue passing hole 245 may be a circular hole, a square hole, a kidney-shaped hole, or the like.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A battery pack comprising a plurality of cells (10), characterized in that the battery pack further comprises:

the refrigerator comprises a refrigerator body (100), wherein a support beam (110) is arranged inside the refrigerator body (100), the support beam (110) divides the inside of the refrigerator body (100) into a plurality of compartments, a communication channel is arranged between the bottom of the support beam (110) and the inner bottom surface of the refrigerator body (100), and the communication channel is used for communicating two adjacent compartments;

at least two battery modules (200), battery module (200) set up in the compartment.

2. The battery pack according to claim 1, wherein a spacer (130) is provided on an inner bottom surface of the case (100), and the support beam (110) is provided on the spacer (130) to form the communication passage.

3. The battery pack according to claim 1, wherein a pressure relief vent (140) is provided on a side wall of the case (100).

4. The battery pack according to claim 3, wherein an edge beam (150) is arranged on an outer side wall of the box body (100), the edge beam (150) is provided with a pressure relief channel (151) with two through ends, the pressure relief port (140) is communicated with the pressure relief channel (151), and high-temperature gas generated by thermal runaway of the battery core (10) can be discharged to the outside of the box body (100) through the compartment, the pressure relief port (140) and the pressure relief channel (151) in sequence.

5. The battery pack according to claim 1, wherein an electrical chamber is provided in the case (100), and the battery pack further comprises a maintenance cover (160), and the maintenance cover (160) is covered on the electrical chamber and connected to the case (100).

6. The battery pack according to any one of claims 1-5, wherein the battery module (200) comprises a tray (210), the battery cell (10) is disposed on the tray (210), a pressure relief hole (211) is disposed at the bottom of the tray (210), and high-temperature gas generated by thermal runaway of the battery cell (10) can be exhausted into the compartment through the pressure relief hole (211).

7. The battery pack according to claim 6, wherein a bracket (220) is arranged on the tray (210), the battery cell (10) is placed on the bracket (220), a plurality of through holes (221) are formed in the bracket (220), and high-temperature gas generated by thermal runaway of the battery cell (10) can be discharged into the separation bin through the through holes (221) and the pressure relief holes (211) in sequence.

8. The battery pack according to claim 7, wherein the battery module (200) further comprises a structural adhesive (230), the bracket (220) is provided with an adhesive overflow hole (222), the adhesive overflow hole (222) is disposed opposite to a gap between adjacent battery cells (10), an adhesive injection space is provided between the tray (210) and the bracket (220), and the structural adhesive (230) can be filled in the gap, the adhesive overflow hole (222) and the adhesive injection space.

9. The battery pack according to claim 8, wherein the frame (220) is provided with a plurality of ribs (223), the ribs (223) being disposed toward the tray (210), the ribs (223) increasing a contact area of the structural adhesive (230) with the frame (220).

10. The battery pack according to any one of claims 7 to 9, wherein a plurality of positioning portions are provided on the holder (220), the bottom surface of the holder (220) has a plurality of placing portions (226), the positioning portions and the placing portions (226) form positioning grooves, the through-holes (221) are provided at the bottom of the placing portions (226), and the battery cells (10) are provided in the positioning grooves.

11. The battery pack according to claim 10, wherein a plurality of annular ribs (224) are provided at the bottom of the placing portion (226), the annular ribs (224) are provided in contact with the tray (210), and both ends of the annular ribs (224) are respectively communicated with the through holes (221) and the pressure relief holes (211).

12. The battery pack according to claim 11, wherein the positioning portion includes a plurality of positioning blocks (225), and the plurality of positioning blocks (225) are provided at intervals along an outer circumference of the placing portion (226).

13. The battery pack according to claim 12, wherein the positioning block (225) is provided with a groove at a side thereof.

14. The battery pack according to claim 12 or 13, wherein the positioning block (225) has a thickness at the top smaller than the thickness at the bottom.

15. The battery pack according to claim 1, wherein the battery module (200) further comprises a fixing frame (240), the fixing frame (240) is disposed on the top of the battery core (10), a plurality of positioning protrusions (241) are disposed on the fixing frame (240), and the positioning protrusions (241) extend into a gap between two adjacent battery cores (10) and are disposed in contact with the side surfaces of the battery cores (10).

16. The battery pack according to claim 15, wherein the battery module (200) further comprises a bus bar (250), the fixing frame (240) is further provided with a mounting hole, the bus bar (250) is inserted into the mounting hole, and the bus bar (250) is in contact with the battery cells (10) and electrically connects the plurality of battery cells (10).

17. The battery pack of claim 16, wherein the busbar (250) comprises a positive electrode connection portion (251) and a negative electrode connection portion (252), the mounting holes comprise a positive electrode mounting hole (242) and a negative electrode mounting hole (243), the positive electrode connection portion (251) is electrically connected to the positive electrode of the battery cell (10) through the positive electrode mounting hole (242), and the negative electrode connection portion (252) is electrically connected to the negative electrode of the battery cell (10) through the negative electrode mounting hole (243).

18. The battery pack according to claim 16 or 17, wherein the bus bar (250) is provided with a positioning hole, the fixing frame (240) is provided with a positioning post (244), and the positioning post (244) is inserted into the positioning hole.

19. The battery pack according to claim 16 or 17, wherein the battery module (200) further comprises a thermally conductive adhesive (260), and the thermally conductive adhesive (260) is provided on end surfaces of the holder (240) and the bus bar (250) and can bond the holder (240) and the bus bar (250).

20. The battery pack according to claim 19, wherein the fixing frame (240) is provided with a mounting groove, the bus bar (250) is disposed in the mounting groove, the mounting hole is disposed at the bottom of the mounting groove, the side edge of the bus bar (250), the bottom of the mounting groove and the side wall of the mounting groove form a glue storage groove (261), and the glue storage groove (261) can accommodate the heat-conducting glue (260).

21. The battery pack according to claim 19, wherein the fixing frame (240) is provided with a glue hole (245), the glue hole (245) is located at the top end of the battery core (10), and the heat-conducting glue (260) can be filled in the glue hole (245) and is in contact with the top end of the battery core (10).