CN217641669U

CN217641669U - Battery box body structure, electric core and battery pack

Info

Publication number: CN217641669U
Application number: CN202221102653.7U
Authority: CN
Inventors: 刘勇
Original assignee: Shanghai Lanjun New Energy Technology Co Ltd
Current assignee: Shanghai Lanjun New Energy Technology Co Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2022-10-21
Anticipated expiration: 2032-04-28

Abstract

An embodiment of the utility model provides a battery box structure, electric core and battery package belongs to battery technical field. The battery box body structure is used for accommodating the battery core. The battery box structure comprises a box body and a partition plate, wherein the box body is provided with a containing space, the partition plate is arranged in the containing space, the partition plate divides the containing space into a first area and a second area, an air vent is arranged on the partition plate, the first area and the second area are communicated through the air vent, the first area is used for installing an electric core, and the air vent is used for corresponding to an explosion-proof valve of the electric core so as to guide gas and liquid flowing out of the explosion-proof valve to the second area under the condition that the explosion-proof valve of the electric core is opened. The embodiment can delay or improve the heat diffusion of the battery pack.

Description

Battery box body structure, electric core and battery pack

Technical Field

The utility model relates to a secondary battery technical field particularly, relates to a battery box structure, electric core and battery package.

Background

The explosion-proof valve of electric core and electric core utmost point post in current battery package generally all homonymy setting, and be in same one side with the high-pressure junction of high-voltage battery package, when the electric core thermal runaway that generates heat, the insulating layer that the high-temperature hot gas stream that the explosion-proof valve of electric core opened and jetted and high-temperature liquid can destroy the high pressure and connect with spray at adjacent electric core to can lead to system high-voltage insulation to lose efficacy and other electric cores take place thermal runaway, thereby further initiation thermal diffusion.

SUMMERY OF THE UTILITY MODEL

The utility model aims at including, for example, provide a battery box structure, electric core and battery package, it can avoid high temperature air current and high temperature liquid to destroy the insulating layer of high-pressure junction and avoid influencing other electric cores under the circumstances that electric core takes place the thermal runaway.

The embodiment of the utility model discloses a can realize like this:

in a first aspect, the utility model provides a battery box structure for holding electricity core, battery box structure includes box and baffle, the box has the accommodation space, the baffle set up in the accommodation space, the baffle will the accommodation space is divided for first region and second region, be provided with the air vent on the baffle, the air vent will first region with the regional intercommunication of second, first region is used for the installation electricity core, the air vent be used for with the explosion-proof valve of electricity core corresponds with will under the condition that the explosion-proof valve of electricity core was opened gas and the liquid stream water conservancy diversion that the explosion-proof valve flows extremely the second region.

In an alternative embodiment, the first region is located above the second region.

In an optional embodiment, the battery box body structure further includes a sealing heat insulation member, the sealing heat insulation member is disposed on one side of the partition board located in the first area and is disposed on an outer periphery of the vent hole, and the sealing heat insulation member is used for sealing and insulating heat between the partition board and the battery cell.

In an optional implementation manner, the battery box body structure further includes an explosion-proof balance assembly, the explosion-proof balance assembly is disposed on the box body and is communicated with the second region, and the explosion-proof balance assembly is used for balancing pressure of the second region.

In an alternative embodiment, the first area is located above the second area, the side wall of the box body is provided with an airflow channel communicated with the second area, and the explosion-proof balancing assembly is communicated with the second area through the airflow channel;

the explosion-proof balance assembly is arranged on the side wall of the box body corresponding to the second area; or, the explosion-proof balance assembly is arranged on the side wall of the box body corresponding to the first area.

In an alternative embodiment, a groove is concavely arranged on one side of the partition board close to the first area in the direction towards the second area, and the vent hole is arranged on the bottom wall of the groove; or a boss is convexly arranged on one side, close to the first area, of the partition board, and the vent hole is convexly arranged on the top wall of the boss.

In an optional implementation manner, the battery box body structure further includes a first cold plate, the first cold plate is disposed on one side of the partition board close to the second region, the first cold plate is used for cooling the first region and the second region, and a through hole corresponding to the vent hole is disposed on the first cold plate.

In an alternative embodiment, the first cold plate is provided with a runner groove, and the first cold plate is attached to the partition portion such that the runner groove forms a cooling flow path.

In an optional embodiment, the battery box body structure further includes a second cold plate, the second cold plate is disposed in the first region, and the second cold plate is configured to cool a side of the battery cell away from the partition plate.

In a second aspect, the utility model provides an electric core is applied to any one of the preceding embodiment battery box structure, electric core includes electric core body and explosion-proof valve, electric core body is provided with the installation department, explosion-proof valve install in the installation department, the installation department and/or explosion-proof valve protrusion electric core body, the installation department and/or explosion-proof valve protrusion the part of electric core body be used for pegging graft in the air vent.

In a third aspect, the present invention provides a battery pack, which includes the battery box structure of any one of the foregoing embodiments and/or the battery core of the foregoing embodiments.

The utility model discloses the beneficial effect of the battery box structure that provides, electric core and battery package includes, for example:

this application sets up the baffle through the accommodation space at the box, utilizes the baffle to separate into two independent first regions and second region with the accommodation space to set up the air vent on the baffle, install at first region back at electric core, the explosion-proof valve of electric core corresponds with the air vent, thereby can take place to pass through the air vent under the condition that the explosion-proof valve of electric core was opened under the condition of thermal runaway electric core will gas and the liquid stream water conservancy diversion that the explosion-proof valve flows are to the second region, and the liquid with high temperature air current and high temperature is kept apart with first region, thereby improves or avoids high temperature air current and high temperature liquid to setting up the damage and the influence of the electric core in first region and the insulation design in first region.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on these drawings without inventive efforts.

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a battery pack according to an embodiment of the present invention;

FIG. 3 is an enlarged view of the point A in FIG. 2;

fig. 4 is an exploded schematic view of a battery pack according to an embodiment of the present invention;

fig. 5 is a schematic view of a partition board of a battery box body structure according to an embodiment of the present invention;

fig. 6 is a schematic view of a partial explosion of a sealing heat insulation member and a partition plate of a battery box body structure according to an embodiment of the present invention;

fig. 7 is a structure of a cell that can be used in a box structure of a battery box provided by an embodiment of the present invention;

fig. 8 is a second structure of a battery cell that can be used in the box structure of the battery box provided by the embodiment of the present invention;

fig. 9 is a third structure of a battery cell that can be used in a box structure of a battery box provided by an embodiment of the present invention;

fig. 10 is a fourth structure of a battery cell that can be used in a box structure of a battery box provided by an embodiment of the present invention.

Icon: 100-battery box body structure; 110-a box body; 111-an accommodating space; 113-a first region; 115-a second region; 116-an airflow channel; 117-a frame; 118-a seal; 119-bottom guard board; 130-a separator; 131-a vent hole; 133-grooves; 150-sealing insulation; 170-explosion proof balancing assembly; 180-a first cold plate; 181-a through hole; 185-cooling flow path; 186-heat conducting glue; 187-a water inlet; 188-water outlet; 190-a second cold plate; 191-a liquid cooling channel; 192-a liquid outlet; 193-liquid inlet; 194-a sealing strip; 195-a thermally conductive member; 200-electric core; 210-a cell body; 230-an explosion-proof valve; 250-positive pole column; 270-negative pole column; 300-battery pack.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that, if the terms "upper", "lower", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience of description and simplification, but the indication or suggestion that the indicated device or element must have a specific position, be constructed and operated in a specific orientation, and thus, should not be interpreted as a limitation of the present invention.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1, fig. 2 and fig. 3, the present embodiment provides a battery pack 300, where the battery pack 300 includes a battery box body structure 100, a plurality of battery cells 200, and a bus bar (not shown) connecting the plurality of battery cells 200. A plurality of cells 200 are all mounted within the battery box body structure 100 and electrically connected by a bus bar. The battery box body structure 100 can guide away the hot air flow and the liquid sprayed by the explosion-proof valve 230 of the battery cell 200 when one or more battery cells 200 are in thermal runaway, so as to avoid the thermal runaway of the whole battery pack 300 caused by the thermal runaway of one battery cell 200 or more battery cells 200.

In the present embodiment, the battery case 110 structurally includes a case 110 and a separator 130. The box body 110 has an accommodating space 111. The partition 130 is disposed in the accommodating space 111. The partition 130 divides the accommodating space 111 into a first area 113 and a second area 115. The partition 130 is provided with a vent hole 131, and the vent hole 131 communicates the first region 113 and the second region 115. The first region 113 is used to mount the battery cell 200. The vent 131 is used to correspond to the explosion-proof valve 230 of the cell 200 installed in the first region 113 to guide the flow of gas and liquid flowing out of the explosion-proof valve 230 to the second region 115 when the explosion-proof valve 230 of the cell 200 is opened.

In the embodiment, the partition board 130 is arranged in the accommodating space 111 of the case 110, the accommodating space 111 is divided into two independent first areas 113 and second areas 115 by the partition board 130, and the vent hole 131 is arranged on the partition board 130, after the battery cell 200 is installed in the first area 113, the explosion-proof valve 230 of the battery cell 200 corresponds to the vent hole 131, so that when the explosion-proof valve 230 of the battery cell 200 is opened under the condition of thermal runaway of the battery cell 200, the gas and liquid flowing out of the explosion-proof valve 230 are guided to the second area 115 through the vent hole 131, and the high-temperature gas flow and the high-temperature liquid are isolated from the first area 113, so that damage and influence of the high-temperature gas flow and the high-temperature liquid to the battery cell 200 arranged in the first area 113 and the insulation design in the first area 113 can be improved or avoided.

It should be noted that the insulation design includes, but is not limited to, an insulation layer for high voltage connection, an insulation layer for low voltage sampling, an insulation partition plate between the positive and negative poles for ensuring an insulation gap, and the like.

In the present embodiment, the first region 113 is located above the second region 115. The first region 113 is disposed above the second region 115, so that in the event of thermal runaway of the battery cell 200, liquid and gas discharged from the explosion-proof valve 230 of the battery cell 200 can be conveniently discharged into the lower second region 115 through the vent hole 131, and meanwhile, high-temperature liquid flowing into the second region 115 can be prevented from flowing back to the first region 113 to cause secondary damage to the battery cell 200 in the first region 113.

It should be noted that the number and the arrangement positions of the vent holes 131 are the same as those of the battery cells 200 arranged in the first region 113, as long as it is ensured that the explosion-proof valve 230 of each or a part of the battery cells 200 can communicate with the second region 115 through the vent holes 131.

Of course, in other embodiments of the present application, the first region 113 and the second region 115 may be arranged side to side or the second region 115 is above the first region 113.

Referring to fig. 4 and 5, in the present embodiment, the box body 110 includes a frame 117, a sealing member 118 and a bottom protection plate 119, the frame 117 is a rectangular frame 117, and the sealing member 118 and the bottom protection plate 119 are sequentially installed at the bottom of the side frame to form a seal with the bottom of the frame 117. The partition 130 is disposed in the frame 117, the partition 130 is disposed parallel to the bottom protection plate 119, an area enclosed between the partition 130 and the bottom protection plate 119 is a second area 115, and an area above the partition 130 is a first area 113.

Of course, in other embodiments of the present application, the frame 117 may have other shapes, such as a square frame 117, a cylinder, or an opposite structure.

Referring to fig. 4 and 6, in the present embodiment, the battery case 110 further includes a sealing heat-insulating member 150. The sealing and insulating member 150 is disposed on one side of the partition 130 located in the first region 113 and disposed on the outer periphery of the vent hole 131, and the sealing and insulating member 150 is used for sealing and insulating between the partition 130 and the battery cell 200. The sealing and heat insulating member 150 is provided so that, after the battery cell 200 is installed in the first region 113, the end surface of the battery cell 200 where the explosion-proof valve 230 is provided abuts against the sealing and heat insulating member 150, so that it is possible to prevent high-temperature liquid from flowing to other battery cells 200 from the space between the battery cell 200 and the separator 130 when the explosion-proof valve 230 of the battery cell 200 is opened.

Specifically, the sealing heat insulation member 150 may be formed of one or more materials such as heat insulation cotton, heat insulation rubber, and heat insulation glue.

Referring to fig. 3, fig. 7 to fig. 10, the battery cell 200 includes a cell body 210, an explosion-proof valve 230, a positive pole 250, and a negative pole 270. The explosion-proof valve 230 is installed on the battery cell body 210, and the explosion-proof valve 230 can be opened under the condition that the battery cell 200 is out of thermal runaway, so that explosion caused by reasons such as pressure inside the battery cell 200 can be avoided. A positive post 250 and a negative post 270 are also mounted on the cell body 210 for connection to a bus bar or for supplying power to electrical equipment.

In some embodiments of the present application, the explosion-proof valve 230, the positive post 250 and the negative post 270 are disposed on the same side of the battery. For example, the explosion-proof valve 230, the positive post 250, and the negative post 270 are provided on the top cover of the cell body 210, and the positive post 250 and the negative post 270 are located on both sides of the explosion-proof, and the cell 200 is inverted in the first region 113 when the cell 200 is mounted, so that the top cover of the cell 200 abuts against the sealing and insulating member 150, and the explosion-proof valve 230 is aligned with the vent hole 131.

It should be noted that, in some embodiments of the present application, the battery cell 200 may also adopt the battery cell 200 in which the positive and

negative posts

250 and 270 are disposed on different sides from the explosion-proof valve 230. For example, the positive pole 250 and the negative pole 270 of the battery cell 200 are arranged on the top of the battery cell 200, and the explosion-proof valve 230 is arranged on the battery cell 200 at the bottom of the battery cell 200; for another example, the positive electrode column 250 and the negative electrode column 270 are respectively disposed on opposite sides of the battery cell 200, and the explosion-proof valve 230 is disposed on the top or bottom of the battery cell 200. Of course, the battery cell 200 may also be a cylindrical battery cell 200. Under the condition that the explosion-proof pole and the positive and negative poles 270 are not on the same plane, when the battery cell 200 is installed, only the side of the battery cell 200 where the explosion-proof valve 230 is arranged is required to be arranged towards the partition plate 130, so that the side of the battery cell 200 where the explosion-proof valve 230 is arranged is abutted against the sealing heat-insulating member 150, and the explosion-proof valve 230 is aligned with the vent hole 131.

It should be noted that the embodiment of the present invention does not limit the type of the battery cell 200, as long as it has the explosion-proof valve 230 and is correspondingly communicated with the air vent 131 after the battery cell 200 is installed. It should be noted that, when the vent hole 131 corresponds to the explosion-proof valve 230, the vent hole 131 may be aligned with the explosion-proof valve 230 or slightly offset from the vent hole 131, as long as it is ensured that the liquid and gas flowing out of the explosion-proof valve 230 can be guided to the second area 115 through the vent hole 131, and the alignment between the vent hole 131 and the explosion-proof valve 230 is not limited herein.

In some embodiments of the present application, the size of the vent hole 131 is slightly larger than the size of the exhaust valve of the battery cell 200, so that the installation accuracy of the battery cell 200 can be reduced, and the battery cell 200 can be more conveniently installed.

Of course, in other embodiments of the present application, the vent hole 131 and the explosion-proof valve 230 of the battery cell 200 may also be connected at equal intervals by a pipe, so that the gas or liquid discharged from the explosion-proof valve 230 of the battery cell 200 is discharged to the vent hole 131 through the pipe.

In some embodiments of the present application, a mounting portion is provided on the cell body 210, and the explosion-proof valve 230 is mounted on the mounting portion. The mounting portion and/or the explosion-proof valve 230 protrudes out of the cell body 210, and the portion of the mounting portion and/or the explosion-proof valve 230 protruding out of the cell body 210 is used for being inserted into the vent hole 131. By the mounting portion and/or the explosion-proof valve 230 protruding from the cell body 210, the explosion-proof valve 230 and the vent hole 131 of the cell 200 can be more easily centered and mounted during mounting, and liquid leakage into the first region 113 can also be avoided.

With continued reference to fig. 3 and 4, since the explosion-proof valve 230 of the battery cell 200 is communicated with the second region 115, in the event of thermal runaway of the battery cell 200, a rapid increase in temperature and pressure of the second region 115 may be caused in a short time, and thus, an explosion of the case 110 structure of the battery box may be caused. In this embodiment, the battery case 110 further includes an explosion-proof balancing assembly 170. The anti-explosion balancing assembly 170 is disposed on the box body 110, the anti-explosion balancing assembly 170 is communicated with the second area 115, and the anti-explosion balancing assembly 170 is used for balancing the pressure of the second area 115. By providing the explosion-proof balancing assembly 170 to the box body 110, in case of thermal runaway of the battery cell 200, the air can be exhausted or drained to achieve pressure balance of the second region 115, so as to prevent the battery box body structure 100 from exploding.

The explosion proof balancing assembly 170 may be a one-way valve having an explosion proof exhaust function or a two-way valve having a two-way balancing pressure, which may be opened to allow external air to enter the second region 115, thereby ensuring a balanced difference between internal and external pressures, and may be opened to allow gas or liquid to be exhausted from the second region 115 according to the pressure. Of course, in other embodiments of the present application, the explosion-proof balancing assembly 170 may also be a disposable explosion-proof valve sheet. In this embodiment, the explosion proof counterbalance assembly 170 is preferably a two-way valve having a two-way counterbalance pressure.

In this embodiment, the sidewall of the box body 110 is provided with an airflow channel 116 communicated with the second region 115, the explosion-proof balance assembly 170 is communicated with the second region 115 through the airflow channel 116, and the explosion-proof balance assembly 170 is arranged on the sidewall of the box body 110 corresponding to the first region 113. The height of the anti-explosion balance assembly 170 is set at the side wall of the box body 110 corresponding to the first area 113, so that the liquid flowing into the second area 115 from the battery cell 200 in a thermal runaway manner can be stored in the second area 115, the storage capacity is increased, and the corrosion to other parts, such as the chassis and the frame of the electric vehicle, after being discharged by the anti-explosion balance assembly 170 is avoided. Secondly, the explosion proof balancing assembly 170 can be prevented from being damaged by flying stones or the like.

In the present embodiment, the number of the explosion-proof balancing assemblies 170 includes two, and two explosion-proof balancing assemblies 170 are disposed at opposite sidewalls of the case 110. Two opposite side walls of the box body 110 are provided with second flow passages to communicate the explosion-proof balancing assembly 170 with the second area 115.

Of course, in other embodiments of the present application, the anti-explosion balancing assembly 170 is disposed on the side wall or the bottom wall of the box body 110 corresponding to the second region 115.

In this embodiment, the case 110 is further provided with a pressure balancing valve communicating with the first region 113, and the pressure balancing valve is used for balancing the pressure outside the first region 113 and the battery pack 300.

Referring to fig. 5 and 6, in the present embodiment, a concave groove 133 is disposed on a side of the partition 130 close to the first region 113 in a direction toward the second region 115, and the vent 131 is disposed on a bottom wall of the concave groove 133. The sealing insulation 150 is disposed in the groove 133. The thermal insulation member 150 is provided with through holes (not shown) corresponding to the air holes 131 one to one.

Of course, in other embodiments of the present application, a boss may be protruded from a side of the partition 130 close to the first region 113, the vent 131 is protruded from a top wall of the boss, and the thermal insulation member 150 is disposed on the top wall of the boss.

In the present embodiment, a space having a height difference is formed at both sides of the explosion-proof valve 230 by providing the groove 133 or the boss, thereby facilitating the installation of the bus bar and implementing insulation.

The hot air flow or the liquid may transfer heat to the battery cells 200 in the first region 113 by way of heat transfer due to the discharge into the second region 115, and heat may also be generated from the battery cells 200 and the bus bars during charging and discharging as the rapid charging technology is developed. In this embodiment, the battery box case structure 100 further includes a first cold plate 180. The first cold plate 180 is disposed on a side of the partition 130 close to the second region 115, the first cold plate 180 is used for cooling the first region 113 and the second region 115, and the first cold plate 180 is provided with a through hole 181 corresponding to the vent hole 131.

This embodiment is through setting up the cold plate and setting up the cold plate in the baffle 130 one side that is close to second region 115, according to the hot gas flow principle that rises to gas that flows in by vent 131 and through hole 181 can contact with the cold plate after rising, thereby can realize the reduction of second region 115, secondly, first cold plate 180 also can be through baffle 130 for setting up the cooling of electronic components such as electric core 200, the busbar in first region 113, in order to maintain the normal operating of battery package 300.

In this embodiment, the first cold plate 180 and the separator 130 are both provided with channel grooves (not shown), and the first cold plate 180 and the separator 130 are partially attached to each other so that the channel grooves form a closed cooling channel 185. I.e. the simultaneous heat dissipation of the first region 113 and the second region 115 may be achieved by means of heat dissipation by means of a flow of liquid carrying away heat.

The flow channel grooves of the first cold plate 180 and the partition 130, the vent holes 131 and the through holes 181 are generally formed by punching, and the flow channel grooves are formed as the cooling flow channels 185 by welding the first cold plate 180 and the partition 130 after the punching, and then the first cold plate 180 or the partition 130 is provided with the water inlet 187 and the water outlet 188 communicating with the cooling flow channels 185. The cooling medium is circulated through the cooling flow path 185 by a water pump or the like. And in general, the partition 130 is placed in a manner when the battery cell 200 is installed in the first region 113, so that heat exchange between the battery cell 200 and a cooling medium in the cooling flow channel can be better realized, the bearing capacity of the partition 130 can be enhanced, and materials are saved. Certainly, in some embodiments of the application, the partition 130 may also perform heat exchange with the bus bar connected to the electrical core 200 by setting the heat conducting glue 186, so that the cooling medium is utilized to cool the electrical core 200 and also cool other components and parts of the battery pack 300.

In some embodiments of the present application, the first cold plate 180 may also be integrally formed with the separator 130 with a cooling flow path 185 formed therebetween. Such as casting, 3D printing.

Of course, in other embodiments of the present application, the first cold plate 180 may also be other types of cooling elements, such as a semiconductor cooler, etc. Or the partition 130 and the first cold plate 180 are independent of each other, the first cold plate 180 itself can achieve heat exchange with the partition 130 and the second region 115. It is also possible that the partition 130 is made of a refrigerating element, which does not require the additional provision of the first cold plate 180.

In this embodiment, a heat conduction glue 186 is attached to one side of the partition 130 close to the first area 113, and the heat conduction glue 186 can improve the heat exchange efficiency between the battery cell 200 and the partition 130, so that the heat exchange between the partition 130 can be better realized by the parts such as the battery cell 200 and the bus bar.

In some embodiments of the present application, a part of liquid may also be injected into the second region 115, where the liquid may be water or a liquid chemical, and after the battery cell 200 is thermally runaway and flows into the high-temperature liquid into the second region 115, the high-temperature liquid directly falls into the low-temperature liquid in the second region 115, so that the high-temperature liquid can be cooled, and the bottom protection plate 119 is prevented from being damaged by the high-temperature liquid. In the case that the second region 115 is filled with a liquid chemical, the chemical may be determined according to the liquid flowing out of the explosion-proof valve 230 of the battery cell 200, for example, the liquid flowing out of the explosion-proof valve 230 of the battery cell 200 may react with the liquid chemical to absorb heat, so as to achieve temperature reduction. Or the liquid flowing out of the explosion-proof valve 230 of the battery cell 200 can react with the liquid chemical to form a non-corrosive and environment-friendly product, so that the bottom protection plate 119 or the side wall can be prevented from being damaged by corrosion while the temperature is reduced, and the service life of the battery can be prolonged.

In addition, in some embodiments of the present application, a chemical reagent or a cooling fire-extinguishing agent may also be packaged in a sealed container, and the sealed container containing the chemical reagent or the cooling fire-extinguishing agent is disposed in the second area 115, and a detection sensor is disposed in the second area 115, and when the sensor detects that the temperature of the second area 115 exceeds a preset temperature or a preset condition, the sealed container containing the chemical reagent or the cooling fire-extinguishing agent may be opened, so that the second area 115 and the battery cell may be cooled, and heat diffusion in the battery pack 300 may be avoided or improved. The sensor may be a temperature sensor or a harmful gas sensor, or a combination of both.

In this embodiment, the surface of the side of the apron plate 119 adjacent to the partition 130 is coated with a fire-resistant heat insulating material.

In this embodiment, the battery box casing structure 100 further includes a second cold plate 190, and the second cold plate 190 is disposed in the first region 113 and opposite to the first cold plate 180. The second cold plate 190 is used for cooling the side of the battery cell 200 away from the first cold plate 180.

Specifically, the second cold plate 190 is a liquid-cooled cold plate, and a liquid-cooled runner 191, a liquid outlet 192 and a liquid inlet 193 which are communicated with the liquid-cooled runner 191 are arranged in the second cold plate, so that flowing heat exchange of a cooling medium is realized through the liquid inlet 193, the liquid outlet 192 and the liquid-cooled runner 191.

In the present embodiment, the second cold plate 190 is installed on the top of the cabinet 110 and is also configured as a cover of the cabinet 110 to seal the first region 113. A sealing gasket 194 is also provided between the second cold plate 190 and the cabinet 110. One side of the second cold plate 190 and the battery cell 200 are abutted with each other is provided with a heat conducting piece 195, and the heat conducting piece 195 can conduct heat with the heat conducting glue 186 to enable the second cold plate 190 to better exchange heat with the battery cell 200.

To sum up, the embodiment of the present invention provides a working principle and beneficial effects of battery box structure 100, electric core 200 and battery pack 300 include:

the separator 130 is arranged in the accommodating space 111 of the box body 110, the accommodating space 111 is divided into two independent first areas 113 and second areas 115 by the separator 130, the vent hole 131 is formed in the separator 130, and after the battery cell 200 is installed in the first area 113, the explosion-proof valve 230 of the battery cell 200 corresponds to the vent hole 131, so that the gas and liquid flowing out of the explosion-proof valve 230 are guided to the second area 115 through the vent hole 131 under the condition that the explosion-proof valve 230 of the battery cell 200 is opened under the condition that the battery cell 200 is out of thermal runaway, and the high-temperature gas flow and the high-temperature liquid are isolated from the first area 113, so that the damage and the influence of the high-temperature gas flow and the high-temperature liquid to the battery cell 200 arranged in the first area 113 and the insulation design in the first area 113 are avoided.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a battery box structure, its characterized in that for holding electricity core, battery box structure includes box and baffle, the box has the accommodation space, the baffle set up in the accommodation space, the baffle will the accommodation space separates for first region and second region, be provided with the air vent on the baffle, the air vent will first region with the regional intercommunication of second, first region is used for the installation electricity core, the air vent be used for with the explosion-proof valve of electricity core corresponds with will under the condition that the explosion-proof valve of electricity core was opened gas and the liquid stream water conservancy diversion that the explosion-proof valve flows extremely the second region.

2. The battery box casing structure of claim 1, wherein the first region is located above the second region.

3. The battery box casing structure according to claim 1 or 2, further comprising a sealing heat insulator disposed on one side of the partition at the first region and on an outer periphery of the vent hole, the sealing heat insulator being used for sealing and insulating between the partition and the battery cell.

4. The battery box body structure according to claim 1 or 2, further comprising an explosion-proof balancing assembly, wherein the explosion-proof balancing assembly is disposed on the box body and is communicated with the second region, and the explosion-proof balancing assembly is used for balancing pressure of the second region.

5. The battery box structure according to claim 4, wherein the first area is located above the second area, the side wall of the box body is provided with an airflow channel communicated with the second area, and the explosion-proof balance assembly is communicated with the second area through the airflow channel;

the explosion-proof balance assembly is arranged on the side wall of the box body corresponding to the second area; or the like, or a combination thereof,

the explosion-proof balance assembly is arranged on the side wall of the box body corresponding to the first area.

6. The battery box body structure according to claim 1 or 2, wherein a groove is concavely arranged on one side of the partition close to the first area in the direction towards the second area, and the vent hole is arranged on the bottom wall of the groove; or,

a boss is convexly arranged on one side, close to the first area, of the partition board, and the vent hole is convexly arranged on the top wall of the boss.

7. The battery box body structure according to claim 1 or 2, wherein the battery box body structure further comprises a first cold plate, the first cold plate is disposed on one side of the partition plate close to the second area, the first cold plate is used for cooling the first area and the second area, and a through hole corresponding to the vent hole is disposed on the first cold plate.

8. The battery box body structure according to claim 7, wherein the first cold plate is provided with a flow channel groove, and the first cold plate is attached to the partition portion so that the flow channel groove forms a cooling flow path.

9. The battery box body structure of claim 1 or 2, wherein the battery box body structure further comprises a second cold plate, the second cold plate is disposed in the first area, and the second cold plate is used for cooling a side of the battery cell away from the partition plate.

10. An electric core, characterized in that, is applied to any one of battery box structure of claims 1-9, the electric core includes electric core body and explosion-proof valve, the electric core body is provided with the installation department, the explosion-proof valve install in the installation department, the installation department and/or the explosion-proof valve protrusion the electric core body, the installation department and/or the explosion-proof valve protrusion the part of electric core body be used for pegging graft in the air vent.

11. A battery pack, characterized by comprising the battery box casing structure of any one of claims 1 to 9 and/or comprising the battery cells of claim 10.