CN218070108U

CN218070108U - Battery pack box, battery pack, electric device and equipment for manufacturing battery pack

Info

Publication number: CN218070108U
Application number: CN202222408905.5U
Authority: CN
Inventors: 桂昊; 邓江南; 杜俊丰; 金佺良; 於洪将; 陈继程
Original assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenergy Battery Technologies Co Ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2022-12-16
Anticipated expiration: 2032-09-09

Abstract

The utility model discloses a battery pack box body, a battery pack, an electric device and equipment for manufacturing the battery pack, relating to the technical field of batteries; the battery pack box comprises a box body and a plurality of pressure relief sheets; the box body is provided with an accommodating space, and a plurality of pressure relief ports are arranged on the box body at intervals; a plurality of pressure release pieces and a plurality of pressure release mouth one-to-one set up, every pressure release piece all is used for sealing the pressure release mouth that corresponds, and the pressure release piece is configured to be in the encapsulated situation when the internal and external pressure of accommodating space is the same, splits when the pressure in accommodating space is greater than predetermineeing pressure and carries out the pressure release. On one hand, the battery pack box body can fully release pressure when the internal pressure is higher through the arrangement of the plurality of pressure release sheets capable of cracking, so that the pressure release efficiency and quality can be ensured, and the safety performance can be improved; on the other hand, the pressure release piece carries out the pressure release through splitting open the mode, compares in relief valve or explosion-proof valve, and the cost is lower, and occupation space is littleer, can improve the space utilization of battery package, reduces the inefficacy risk of battery package.

Description

Battery pack box, battery pack, electric device and equipment for manufacturing battery pack

Technical Field

The utility model relates to a battery technology field particularly, relates to a battery package box, battery package, consumer and the equipment of making the battery package.

Background

In the related art, the molten material ejected by the thermal runaway of the battery core is easy to accumulate in the battery pack box body, and the risk of low safety performance is realized.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can utilize battery package box self structure to carry out battery package box and battery package of explosion-proof pressure release, it has the advantage that the security performance is high, still has advantage with low costs.

Another object of the present invention is to provide an electric device, which is powered by the battery pack. Therefore, the safety device also has the advantages of high safety performance and low cost.

Another object of the present invention is to provide an apparatus for manufacturing a battery pack, which can be used to manufacture a battery pack with high safety and low cost.

The embodiment of the utility model is realized like this:

in a first aspect, the utility model provides a battery package box, include:

the box comprises a box body, a plurality of pressure relief ports are arranged on the box body at intervals, and each pressure relief port can communicate the accommodating space with the outside;

the pressure relief piece is configured to be in a closed state when the pressure inside and outside the accommodating space is the same, and the pressure in the accommodating space is greater than the preset pressure and is cracked to release the pressure.

In an alternative embodiment, the thickness of the pressure relief sheet is less than the thickness of the walls of the tank body in the pressure relief direction.

In an optional embodiment, the box body is made of a metal material of aluminum or steel, and the pressure relief piece is made of a plastic material;

or,

the box body is made of 5 or 6 series aluminum alloy materials, and the pressure relief piece is made of 2 or 3 series aluminum alloy materials.

In an optional implementation mode, a groove which is concave towards the containing space is formed in one side, away from the containing space, of the pressure relief sheet.

In an alternative embodiment, the number of the grooves is one or more, and the shape of the grooves is a linear long strip or an arc.

In an alternative embodiment, when the number of the grooves is plural, the plural grooves are parallel and spaced, or at least two of the plural grooves intersect or are tangent.

In an optional embodiment, the battery pack case further comprises an exhaust channel, the exhaust channel is arranged in the accommodating space and is provided with an inlet and an outlet, the inlet is used for receiving molten materials in the accommodating space, and the outlet is communicated with the pressure relief ports.

In an optional embodiment, the exhaust passage is provided with a plurality of inlets, and the inlets are arranged at intervals;

and/or the presence of a gas in the gas,

be provided with a plurality of exhaust passage in the battery package box, at least one entry and at least one export have all been seted up to every exhaust passage.

In an optional embodiment, the box body is provided with a communication chamber communicated with the circumferential direction, a plurality of pressure relief ports are arranged on the circumferential side of the communication chamber at intervals, and an outlet of the exhaust channel is communicated with the communication chamber;

or,

exhaust passage's both ends are connected with two boundary beams of case body respectively, all are provided with the cavity in every boundary beam, and exhaust passage's both ends have an export respectively, and two exports communicate with two cavities one-to-one, and at least one pressure release mouth has all been seted up to every cavity.

In an alternative embodiment, the box body comprises two first side beams and two second side beams, wherein the two first side beams are arranged in parallel and at intervals, and the two second side beams are arranged between the two first side beams in parallel and at intervals;

the first edge beam is provided with a first long cavity in a penetrating way, the second edge beam is provided with a second long cavity communicated with the first long cavity in a penetrating way, and the two first long cavities and the two second long cavities are communicated to form a communicated cavity; each first long cavity is provided with an opening;

both ends of the exhaust channel are respectively provided with an outlet, both ends of the exhaust channel are respectively connected with the two first edge beams, and the outlets are communicated with the adjacent openings.

In an optional embodiment, the box body further comprises a closing plate for closing the first opening, and the closing plate comprises a first plate and a second plate which are arranged at intervals along the direction from the first opening to the second opening, the first plate forms a bottom plate of the battery pack box body, the second plate is used for opening an inlet, and the first plate and the second plate together form an exhaust channel.

In an alternative embodiment, the sealing plate further comprises a plurality of partition plates, the partition plates are arranged between the first plate and the second plate in parallel and at intervals, one side of each partition plate is connected with the first plate, the other side of each partition plate is connected with the second plate, and any two adjacent partition plates, the first plate and the second plate form an exhaust channel together.

In a second aspect, the present invention provides a battery pack, including:

the battery pack case of any of the preceding embodiments;

a plurality of electric cores are stacked and arranged in the accommodating space.

In an optional embodiment, two ends of the accommodating space are respectively provided with a first opening and a second opening, the battery pack box body further comprises an exhaust channel located at the first opening, the exhaust channel is arranged in the accommodating space and provided with an inlet and an outlet, the inlet faces the second opening and is used for receiving molten materials in the accommodating space, and the outlet is communicated with the plurality of pressure relief ports.

In an optional embodiment, a plurality of inlets matched with the number of the plurality of battery cells are arranged on the exhaust channel, and each safety valve is opposite to or can extend into the corresponding inlet.

In an optional embodiment, the safety valve is convexly arranged on the end face of the battery cell, the safety valve can extend into the corresponding inlet, and the end face of one end of the battery cell, which is provided with the safety valve, is supported on the exhaust passage and closes the corresponding inlet;

or,

the relief valve caves in the terminal surface of electric core, and the relief valve is relative and the interval sets up with the entry, and electric core sets up the circumference of the one end of relief valve and supports in exhaust passage, and seals the entry that corresponds.

In an optional embodiment, the safety valve is convexly arranged on the end surface of the battery cell; the battery pack further comprises a water cooling plate, the water cooling plate is arranged in the accommodating space and arranged between the end face of the battery cell with the safety valves and the exhaust channel, through holes opposite to the safety valves are formed in the water cooling plate, and each safety valve can penetrate through the through holes to stretch into the corresponding inlet.

In an optional embodiment, a positive pole and a negative pole are arranged on one side of the battery cell away from the safety valve.

A third aspect of the present invention provides an electric device, including:

an electricity utilization mechanism;

the battery pack of any of the preceding embodiments, the battery pack for powering an electrical utility.

In a fourth aspect, the present invention provides an apparatus for manufacturing a battery pack, comprising:

the battery pack box comprises a box body and a plurality of pressure relief sheets; the box body is provided with an accommodating space, and a plurality of pressure relief ports are arranged on the box body at intervals;

the mounting module is used for correspondingly sealing the pressure relief pieces with the pressure relief ports one by one, the pressure relief pieces are configured to be in a sealed state when the pressure inside and outside the accommodating space is the same, and the pressure relief pieces crack to release pressure when the pressure inside the accommodating space is greater than the preset pressure; and is used for stacking a plurality of battery cores in the accommodating space.

The embodiment of the utility model provides an at least possess following advantage or beneficial effect:

the embodiment of the utility model provides a battery pack box body, which comprises a box body and a plurality of pressure relief sheets; the box body is provided with an accommodating space, a plurality of pressure relief ports are arranged on the box body at intervals, and each pressure relief port can communicate the accommodating space with the outside; a plurality of pressure release pieces and a plurality of pressure release mouth one-to-one set up, every pressure release piece all is used for sealing the pressure release mouth that corresponds, and the pressure release piece is configured to be in the encapsulated situation when the internal and external pressure of accommodating space is the same, splits when the pressure in the accommodating space is greater than predetermineeing pressure and carries out the pressure release. On one hand, the battery pack box body can fully release pressure when the pressure in the battery pack box body is higher through the arrangement of the plurality of pressure release sheets capable of cracking, so that the pressure release efficiency and quality can be ensured, and the safety performance can be improved; on the other hand, the pressure release piece carries out the setting of pressure release through splitting open the mode, compares in relief valve or explosion-proof valve, and the cost is lower, and occupation space is littleer, can improve the space utilization of battery package, reduces the inefficacy risk of battery package.

The embodiment of the utility model also provides an electric installation, it supplies power through foretell battery package. Therefore, the safety device also has the advantages of high safety performance and low cost.

The embodiment of the utility model provides an equipment of manufacturing battery package is still provided, and it can prepare and obtain above-mentioned security performance height, battery package with low costs.

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 structural diagram of a battery pack according to an embodiment of the present invention;

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

fig. 3 is a schematic cross-sectional view of a battery pack according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

fig. 5 is a schematic partial structural view of a case body of a battery pack according to an embodiment of the present invention;

fig. 6 is a schematic partial structural diagram of a battery pack according to an embodiment of the present invention;

fig. 7 is a schematic view of a partial structure of a battery pack according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of a sealing plate of a battery pack according to an embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at I;

fig. 10 is a first schematic structural diagram of a first boundary beam of a battery pack according to an embodiment of the present invention;

fig. 11 is a second schematic structural view of a first boundary beam of a battery pack according to an embodiment of the present invention;

fig. 12 is a schematic structural view of a second boundary beam of a battery pack according to an embodiment of the present invention.

Icon: 100-battery pack case; 101-a tank body; 102-a housing space; 103-a first edge beam; 104-a second edge beam; 105-a pressure relief vent; 107-pressure relief tablets; 109-grooves; 110-a closing plate; 111-an exhaust channel; 113-a first plate; 115-a second plate; 117-spacer plate; 118-an inlet; 119-an outlet; 121-a first long cavity; 123-a second long cavity; 125-weight loss cavity; 127-a vertical portion; 129-horizontal part; 131-opening holes; 200-a battery pack; 201-electric core; 203-positive pole; 205-negative pole column; 207-safety valve; 209-shell; 211-water cooling plate; 213-through hole.

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 present invention, presented in the accompanying drawings, 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 the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like 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 product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the related art, the molten material ejected by the thermal runaway of the battery core is easy to accumulate in the battery pack box body, and the risk of low safety performance is realized. In view of this, this embodiment provides a battery package box and battery package that can utilize battery package box self structure to carry out explosion-proof pressure release, and it has the advantage that the security performance is high, still has advantage with low costs. The structure of the battery pack will be described in detail below.

Fig. 1 is a schematic structural diagram of a battery pack 200 according to the present embodiment; fig. 2 is an exploded view of the battery pack 200 according to the present embodiment; fig. 3 is a schematic cross-sectional view of a battery pack 200 according to the present embodiment; fig. 4 is a partial enlarged view at I of fig. 3. Referring to fig. 1 to 4, the present embodiment provides a battery pack 200, which includes a battery pack case 100 and a plurality of battery cells 201.

The battery pack case 100 is a frame structure of the battery pack 200, and is used for ensuring the safety and stability of the battery cell 201, so as to ensure the normal operation of charging and discharging operations. Specifically, the battery pack case 100 includes a case body 101, and the case body 101 has an accommodating space 102. The plurality of battery cells 201 are mounted in the accommodating space 102 of the case body 101 in the form of a battery module. A plurality of battery modules can be simultaneously placed in the receiving space 102, for example, as shown in fig. 1 and fig. 2, two battery modules arranged side by side along a first direction (i.e., ab direction of fig. 1) are stored in the receiving space 102 of the box body 101, each battery module includes a housing 209 and two battery cell assemblies arranged side by side along the first direction in the housing 209, and each battery cell assembly includes a plurality of battery cells 201 stacked along a second direction (i.e., cd direction of fig. 2). A plurality of electric cores 201 homoenergetic in the electric core subassembly of every battery module are established ties or are parallelly connected through the connecting row to guarantee the normal clear of charge-discharge operation. Of course, in other embodiments, a middle module structure may be omitted, and a plurality of battery cells 201 may be directly stacked in the box body 101 to form the battery pack 200, which is not limited in this embodiment.

Meanwhile, after a single battery cell 201 is out of control thermally, a molten material of the single battery cell 201 can be sprayed into the accommodating space 102 of the battery pack box 100, so that a plurality of pressure relief ports 105 are further arranged on the peripheral side of the box body 101 of the battery pack box 100 as required, the pressure relief ports 105 are arranged at intervals, and each pressure relief port 105 can be communicated with the accommodating space 102 and the outside so as to perform pressure relief operation. Correspondingly, the battery pack case 100 further includes a plurality of pressure relief sheets 107, each pressure relief sheet 107 is used for closing the corresponding pressure relief opening 105, the pressure relief sheets 107 are configured to be in a closed state when the pressure inside and outside the accommodating space 102 is the same, and the pressure relief sheets are cracked to release pressure when the pressure inside the accommodating space 102 is greater than a preset pressure. The value setting of the preset pressure is determined by experience or experiment, and is generally a pressure value when thermal runaway exists in the case body 101 of the battery pack case 100 or thermal runaway is about to occur, and for different types of battery packs 200, the value of the preset pressure is adjusted accordingly, which is not described in detail in this embodiment.

On one hand, the battery pack case 100 can fully release pressure when the pressure in the battery pack case 100 is high by arranging the plurality of pressure release sheets 107 which can be cracked, so that the pressure release efficiency and quality can be ensured, and the safety performance can be improved; on the other hand, the pressure relief piece 107 carries out the setting of pressure relief through the rupture mode, compares in setting up relief valve, relief valve or explosion-proof valve, and the cost is lower, and occupation space is littleer, can improve battery package 200's space utilization, reduces battery package 200's inefficacy risk.

It should be noted that, in the present embodiment, the strength of the pressure relief piece 107 at the pressure relief port 105 may be set to be lower than that of the tank body 101, so that, in the process of increasing the internal pressure of the tank body 101, the pressure relief piece 107 performs bursting pressure relief first. That is, in this embodiment, the opening pressure of the pressure relief opening 105 is P, the instantaneous internal air pressure of the battery cell 201 during thermal runaway is P1, and the maximum air pressure that can be borne by the box body 101 is P2, so that it is required to satisfy that P < P1 < P2. Through setting up like this, can fully guarantee that pressure release piece 107 can carry out the pressure release operation when electric core 201 thermal runaway to guarantee the security of whole battery package 200.

In order to distinguish the strength of the pressure release sheet 107 from that of the tank main body 101, in the present embodiment, the thickness of the pressure release sheet 107 is smaller than the thickness of the wall body of the tank main body 101 in the pressure release direction (also in the opposite direction of the second direction, also in the dc direction). That is, the pressure relief sheet 107 may be formed by thinning the tank body 101. Through the setting of attenuate, can make the intensity that pressure release piece 107 department is less than the intensity of case body 101 to do benefit to going on smoothly of pressure release operation. Of course, the strength of the pressure relief sheet 107 can also be controlled by material, for example, in this embodiment, the box body 101 can be made of metal material such as aluminum or steel, and the pressure relief sheet 107 can be made of plastic material such as PC or PET. For example, the casing body 101 may be made of 5 or 6 series aluminum alloy material, and the pressure relief piece 107 may be made of 2 or 3 series aluminum alloy material.

As an optional scheme, fig. 5 is a schematic view of a partial structure of the box body 101 of the battery pack 200 provided by an embodiment of the present invention, please refer to fig. 5, in order to further ensure that the pressure relief sheet 107 can perform the pressure relief operation when the electric core 201 is in thermal runaway, in this embodiment, a groove 109 recessed toward the accommodating space 102 is formed on one side of the pressure relief sheet 107 departing from the accommodating space 102. The notch of the groove 109 faces away from the tank body 101. Through the setting of recess 109 for along the pressure release direction, the pressure release piece 107 is more easily ruptured, and along the opposite direction of pressure release direction, two cell wall butts of the recess 109 of pressure release piece 107 are difficult for breaking, thereby do benefit to and reach one-way explosion-proof purpose, with the security that improves battery package 200. Meanwhile, the provision of the groove 109 corresponds to further thinning of the pressure relief sheet 107, so that the thinned portion is more easily broken by the air pressure, thereby further improving the safety of the battery pack 200.

It should be noted that, in the present embodiment, the number of the grooves 109 is one or more. Meanwhile, the groove 109 is in the shape of a linear long strip or an arc, and the interface of the notch can be square, triangular or trapezoidal. When the number of the grooves 109 is plural, the plural grooves 109 may be arranged in parallel, or at least two grooves 109 may intersect or be tangent. Two crossed or tangent grooves 109 are formed, so that intersection points exist between the grooves 109, the intersection points can guide the molten materials after the explosion-proof sheet breaks to flow to the intersection points in a concentrated mode, and the splashing problem can be reduced.

Referring to fig. 1 to 4 again, in the present embodiment, the accommodating space 102 of the box body 101 includes a first opening and a second opening that are spaced apart in a third direction (the first direction, the second direction and the third direction are mutually perpendicular to each other, and the third direction is the fe direction in fig. 2 and is also a vertical direction), the first opening is a bottom of the accommodating space 102, and the second opening is a top of the accommodating space 102. Meanwhile, the battery pack case 100 further includes a closing plate 110 disposed in the accommodating space 102 and located at the first opening to close the first opening. The closing plate 110 has an exhaust passage 111 therein, the exhaust passage 111 has an inlet 118 and an outlet 119, the inlet 118 faces the second opening for receiving the molten material in the receiving space 102, and the outlet 119 is communicated with the plurality of pressure relief ports 105. Through setting up like this for the melting material that sprays and go out when electric core 201 thermal runaway can the downstream earlier and is acceptd exhaust passage 111, then rethread exhaust passage 111 and pressure release piece 107 carry out the pressure release, can prevent effectively that the melting material from splashing, thereby can reduce the influence of thermal runaway electric core 201 to not thermal runaway electric core 201, prevent the thermal runaway diffusion, with the security that improves battery package 200. Certainly, in other embodiments, the first direction, the second direction and the third direction may also be two by two three directions that form other included angles, so as to ensure stability, reliability and safety of each operation, which is not limited in this embodiment.

As an alternative, fig. 6 is a schematic diagram of a partial structure of the battery pack 200 provided in this embodiment. Referring to fig. 3 to fig. 6, in order to reduce the splashing of the molten material from the battery cells 201, in the present embodiment, the safety valve 207 of each battery cell 201 is located on a side of the battery cell 201 facing the exhaust channel 111. With battery cell 201's relief valve 207 towards exhaust passage 111 for when battery cell 201 thermal runaway, the adjacent entry 118 of molten material ability transient admission that it jetted out, thereby make molten material ability act on to pressure release piece 107 through entry 118, exhaust passage 111 and export 119, make pressure release piece 107 can break in order directly to carry out the pressure release, thereby can reduce the influence to other battery cells 201, with the security of fully guaranteeing battery package 200, the life of extension battery package 200.

Further, in the present embodiment, the number of the air discharge passages 111 of the closing plate 110 may be set to match the number of the cell assemblies, for example, four air discharge passages 111 arranged at intervals as shown in fig. 2, while the air discharge passages 111 are a passage structure penetrating the closing plate 110 in the second direction, and the number of the inlets 118 on each air discharge passage 111 matches the number of the safety valves 207 in each cell assembly, for example, twelve inlets 118 arranged at intervals in the first direction are provided on each air discharge passage 111. And twelve safety valves 207 in each battery cell 201 group are arranged in one-to-one correspondence with twelve inlets 118, so that the explosion-proof operation of the battery pack box 100 is more timely and reliable, the flow of molten substances to other places can be effectively reduced, and the safety of the battery pack 200 is further improved. Meanwhile, the exhaust channel 111 is arranged in the closing plate 110, and the closing plate 110 can be used for supporting the battery cell 201, so that the stability and reliability of the battery cell 201 are ensured, and the stability and safety of the battery pack 200 are further improved.

It should be noted that, in this embodiment, and along the direction from the first opening to the second opening, the closing plate 110 specifically includes a first plate 113 and a second plate 115 that are arranged at intervals, both the first plate 113 and the second plate 115 are flat plates, the first plate 113 is close to the bottom of the battery pack 200, the second plate 115 is close to the top of the battery pack 200, the first plate 113 forms a bottom plate of the battery pack case 100, the second plate 115 is used for opening the inlet 118, and the first plate 113 and the second plate 115 together form the exhaust passage 111. Meanwhile, as the number of the exhaust channels 111 is multiple, a plurality of partition plates 117 are arranged between the first plate 113 and the second plate 115 at intervals, the plurality of partition plates 117 are arranged between the first plate 113 and the second plate 115 in parallel and at intervals, each partition plate 117 is connected with the first plate 113 on one side and the second plate 115 on the other side, and any two adjacent partition plates 117, the first plate 113 and the second plate 115 jointly form one exhaust channel 111. Through the arrangement, the exhaust channel 111 can be arranged by utilizing the structure of the sealing plate 110, and the battery pack box body 100 can be used for exhausting by being far away from the structure, so that the cost can be saved, and the working efficiency can be ensured; meanwhile, because the plurality of exhaust channels 111 are all arranged inside the closing plate 110, the upper surface of the closing plate 110 is flush, and the stability and reliability of the battery cell 201 supported on the closing plate 110 are further ensured. Of course, in other embodiments, the exhaust channel 111 may also be a pipe structure protruding on the sealing plate 110, which can ensure the stability of the battery cell 201, and this embodiment is not limited.

It should be further noted that, in order to ensure the timeliness of explosion prevention of the battery pack 200, in the present embodiment, the size of each inlet 118 may be set to be slightly larger than the size of the safety valve 207 of the corresponding battery cell 201, so that the projection of the safety valve 207 in the vertical direction (i.e., the ef direction in fig. 2) completely falls within the range of the corresponding inlet 118.

Referring to fig. 4 and fig. 6 again, in the present embodiment, the safety valve 207 of each cell 201 may be disposed to protrude toward the first opening, so that a side of the safety valve 207 adjacent to the first opening can extend into the corresponding inlet 118, and thus an end of the cell 201 where the safety valve 207 is disposed can be supported above the sealing plate 110 and can seal the corresponding inlet 118. Through such setting, on the one hand can improve the stability and the security of electric core 201 to improve the stability, reliability and the security of battery package 200. On the other hand, each inlet 118 can be closed when the battery cell 201 is not in thermal runaway, so that external water vapor is prevented from entering the battery pack 200, and the service life and the service performance of the battery pack 200 can be ensured.

Certainly, in other embodiments, the safety valve 207 may be recessed in the end surface of the electrical core 201, at this time, one end of the electrical core 201, where the safety valve 207 is disposed, is substantially in a bowl-shaped structure, the safety valve 207 is located at the bottom of the bowl-shaped structure, so that the circumferential direction of the end of the electrical core 201, where the safety valve 207 is disposed, can be supported on the periphery of the position, where the inlet 118 is formed in the sealing plate 110, and after the electrical core 201 is stably supported on the sealing plate 110, the safety valve 207 and the inlet 118 are disposed at an interval in the vertical direction, and the end surface of the electrical core 201, where the safety valve 207 is disposed, closes the corresponding inlet 118. Through such setting, also can improve the stability and the security of electric core 201 to improve the stability, reliability and the security of battery package 200. Meanwhile, each inlet 118 can be sealed when the battery cell 201 is not in thermal runaway, so that external water vapor is prevented from entering the battery pack 200, and the service life and the service performance of the battery pack 200 can be ensured.

That is, no matter the safety valve 207 is convexly arranged on the end surface of the battery cell 201 or is recessed in the end surface of the battery cell 201, the end surface of the battery cell 201 provided with the safety valve 207 can seal the inlet 118, so that the purpose of setting is to prevent external water vapor from entering and influencing the normal operation of the battery pack 200. Of course, in other embodiments, the battery cell 201 may also be supported by the box body 101, and after being supported by the box body 101, the bottom of the battery cell 201 and the exhaust channel 111 are arranged at an interval, so that the molten material can be discharged to the outlet 119 through the inlet 118 to reach the pressure relief sheet 107, so as to facilitate pressure relief of the pressure relief sheet 107; simultaneously, relief valve 207 can also flush the terminal surface of electric core 201 relatively, the embodiment of the utility model discloses an all do not do the restriction.

In addition, referring to fig. 3 to fig. 6 again, in the present embodiment, the positive post 203 and the negative post 205 of each cell 201 may be separated from the safety valve 207, for example, the positive post 203 and the negative post 205 of each cell 201 are both disposed at a side close to the second opening. Through the arrangement, when the battery cell 201 is out of control thermally, the ejected molten substance does not affect the safety of the positive pole 203 and the negative pole 205, and the thermoelectric separation can be realized, so that the safety of the battery pack 200 is further improved.

Referring to fig. 2 to fig. 3 again, in the present embodiment, the battery pack 200 further includes a water-cooling plate 211, the water-cooling plate 211 is disposed in the accommodating space 102 and disposed between the end surface of the battery cell 201 where the safety valve 207 is disposed and the sealing plate 110, the water-cooling plate 211 is provided with through holes 213 opposite to the safety valves 207, the size of the through holes 213 is the same as that of the inlets 118 formed on the sealing plate 110 below, and the through holes are opposite to each other one by one, so that the safety valve 207 of each battery cell 201 can extend into the corresponding inlet 118 after passing through the corresponding through hole 213. On the one hand, through the setting of water-cooling board 211, can provide water-cooling and heat dissipation function for electric core 201, reduce the appearance of electric core 201 thermal runaway, on the other hand, because water-cooling board 211 still is close to the setting of closing plate 110, therefore can also cool down to the exhaust passage 111 of closing plate 110, reduce the damage of high temperature melting material to closing plate 110, prolong electric core 201 and closing plate 110's life, guarantee the normal clear of pressure release operation, thereby guarantee the normal clear of battery package 200 charge-discharge operation.

It should be noted that, in this embodiment, the water-cooling plate 211 may be a whole plate, or may be a plurality of plates respectively opposite to the plurality of battery modules or the plurality of battery modules, and it is more convenient to install and position by using a whole plate for water-cooling, so that the cost can be saved.

In the present embodiment, the water-cooling plate 211 may have a closed plate-like structure or a plate-like structure having a joint. When the plate-shaped structure is closed, a water-cooling or liquid-cooling solvent can be poured into the plate-shaped structure, when the plate-shaped structure is provided with a joint, the plate-shaped structure can be externally connected with a pipeline so as to realize the circulating flow of cooling water or cooling liquid, and the pipeline can be embedded in the box body 101 so as to ensure the cooling effect and can be selected according to the requirements.

Fig. 7 is a partial schematic structural diagram of a battery pack 200 according to the present embodiment; fig. 8 is a schematic structural view of the sealing plate 110 of the battery pack 200 according to the present embodiment; fig. 9 is a partially enlarged view at I of fig. 8. Referring to fig. 7 to 9, in order to realize that the exhaust channel 111 can be depressurized by the pressure relief sheet 107 at the pressure relief port 105, in the embodiment, the tank body 101 may be provided with a communication chamber having a circumferential communication, the plurality of pressure relief ports 105 are spaced apart from a circumferential side of the communication chamber, and an outlet 119 of each exhaust channel 111 is communicated with the communication chamber. After the communication chamber which is circumferentially communicated is provided, no matter how the extending direction of the exhaust passage 111, it can be communicated with the communication chamber, so as to conveniently perform pressure relief through the pressure relief port 105.

In detail, fig. 10 is a first schematic structural diagram of the first side beam 103 of the battery pack 200 provided in this embodiment; fig. 11 is a second schematic structural view of the first side beam 103 of the battery pack 200 according to the present embodiment; fig. 12 is a schematic structural diagram of the second side beam 104 of the battery pack 200 according to this embodiment. Referring to fig. 7 to 12 again, in the present embodiment, the box body 101 specifically includes two first side beams 103 and two second side beams 104, the two first side beams 103 are disposed in parallel and at an interval, each first side beam 103 extends along a first direction, and the two first side beams 103 are disposed at an interval along a second direction. The two second edge beams 104 are arranged between the two first edge beams 103 in parallel at intervals, each second edge beam 104 extends along the second direction, and the two second edge beams 104 are arranged at intervals along the first direction. By this arrangement, the two first side beams 103 and the two second side beams 104 can be enclosed to form the box body 101 in a square shape. Meanwhile, the first edge beam 103 penetrates through the first long cavity 121 along the first direction, the second edge beam 104 penetrates through the second long cavity 123 communicated with the first long cavity 121 along the second direction, and the two first long cavities 121 and the two second long cavities 123 are communicated to form a communicated cavity. Each first long cavity 121 is provided with an opening 131; the exhaust channel 111 extends along the second direction and is arranged between the two first side beams 103, two ends of the exhaust channel 111 are respectively provided with an outlet 119, and each outlet 119 is communicated with the adjacent opening 131.

Because two first boundary beams 103 and two second boundary beams 104 enclose and establish into square structure for two first long chambeies 121 and two second long chambeies 123 can communicate and form the square intercommunication cavity of circumference intercommunication, thereby make the export 119 of exhaust passage 111 communicate with the intercommunication cavity through the trompil 131 of the first boundary beam 103 that corresponds respectively, thereby make the atmospheric pressure of exhaust passage 111 discharge through the pressure release piece 107 of pressure release mouth 105 department behind the intercommunication cavity, in order to fully guarantee the security of battery package 200. Of course, in other embodiments, only a chamber may be disposed in the first edge beam 103, and no chamber may be disposed in the second edge beam 104, and in this case, the outlets 119 at the two ends of the exhaust channel 111 may be respectively communicated with the two chambers in a one-to-one correspondence manner, which is not limited in this embodiment.

Referring to fig. 10 to 12 again, in the present embodiment, the first side rail 103 specifically includes a vertical portion 127 and a horizontal portion 129, and the vertical portion 127 and the horizontal portion 129 may be integrally formed or may be separately formed. Wherein the vertical portion 127 is arranged extending in the ef direction in fig. 2, and the horizontal portion 129 is arranged extending in the second direction, i.e. the cd direction or the dc direction in fig. 2, for example, the horizontal portion 129 of the first side beam 103 on the left side extends in the cd direction, and the horizontal portion 129 of the first side beam 103 on the right side extends in the dc direction. The vertical part 127 and the horizontal part 129 are connected to form an L-shaped structure, and the lower end of the vertical part 127 and the horizontal part 129 penetrate through the first direction to form a first long cavity 121. A lower end portion of the second side member 104 in the vertical direction (i.e., a portion connected to the first long cavity 121) is opened to penetrate in the second direction to form a second long cavity 123. And the first long cavity 121 is provided with an opening 131 at a position adjacent to the cell 201, and the opening 131 may be configured as a long hole to communicate with the outlets 119 of the plurality of exhaust channels 111, respectively. The exhaust passage 111 is connected to the horizontal portion 129, and the outlet 119 of the exhaust passage 111 communicates with the first long chamber 121 through the opening 131. Meanwhile, the outer surface of the lower end of the vertical portion 127 away from the battery cell 201 is provided with a plurality of pressure relief ports 105, for example, three pressure relief ports 105 are communicated with the first long cavity 121, so that the exhaust channel 111 can sequentially pass through the outlet 119, the opening 131 and the pressure relief ports 105 and then perform pressure relief operation by using the pressure relief sheet 107, and the safety performance of the battery pack 200 can be fully ensured.

In the embodiment, since the pressure is released through the pressure release sheet 107, the cost is lower than that of the pressure release valve or the safety valve or the explosion-proof valve. Meanwhile, since the first side beam 103 and the second side beam 104 are both generally in a profile structure, and a cavity is usually required to be formed in the interior of the first side beam and the second side beam to reduce the weight, the cost is not increased by the arrangement of the first long cavity 121 and the second long cavity 123, the original structure of the profile is utilized, the cost can be further reduced, the compactness of the structure of the whole battery pack 200 is ensured, and the service performance of the battery pack 200 is ensured.

In detail, referring to fig. 11 again, in the present embodiment, the opening 131 is a rectangular opening 131, and the first long cavity 121 of each first side beam 103 is opened with two openings 131 arranged at intervals in the first direction. Each opening 131 is communicated with the outlets 119 of the two exhaust channels 111 of the closing plate 110, so that each exhaust channel 111 can be communicated with the pressure relief port 105 through the corresponding opening 131, thereby ensuring the normal operation of the pressure relief operation. Of course, in other embodiments, the number of the openings 131 may be four, four openings 131 are disposed in the first long cavity 121 at intervals along the first direction, and the four openings 131 are respectively opposite to the four exhaust channels 111 to ensure normal mechanical performance of the pressure relief operation, which is not described in detail in this embodiment.

It should be noted that, in the present embodiment, the lower end of the vertical portion 127 of the first side member 103 may protrude in the vertical direction relative to the horizontal portion 129, and the second side member 104 may be correspondingly disposed to protrude relative to the lower surface of the second long cavity 123. Through such an arrangement, after the first edge beam 103 and the second edge beam 104 are connected, and the sealing plate 110 is arranged at the first opening, a certain gap is formed between the distance between the sealing plate 110 and the bottom of the battery pack 200, so that the heat dissipation can be facilitated, and the abrasion to the bottom of the sealing plate 110 can be reduced, thereby prolonging the service life.

It should be noted that, in this embodiment, the vertical portion 127 of the first side member 103 may be provided with a weight-reducing cavity 125 extending along the first direction, and the number of the weight-reducing cavities 125 may be multiple or one. Correspondingly, a weight-reducing cavity 125 may be formed in the second side member 104. Through the arrangement of the weight reduction cavity 125, the weight of the box body 101 can be further reduced, so that the requirement of light weight design of the battery pack 200 is met, and the energy density of the battery pack 200 is further ensured.

In addition, it should be noted that, in the present embodiment, the pressure relief opening 105 is only opened on the outer side of the vertical portion 127 of the first side beam 103, but since the communicating chamber is in a communicating state, in other embodiments, the pressure relief opening 105 may be opened on the outer surface of the second long cavity 123 of the first side beam 103, and the pressure relief sheet 107 may be correspondingly provided. Through setting up like this, can make the equal interval in circumference of case body 101 be provided with pressure release mouth 105 to can guarantee the promptness and the validity of pressure release, can fully guarantee battery package 200's security performance.

The embodiment of the utility model also provides an electric installation, it includes power consumption mechanism to and foretell battery package 200. The electricity utilization mechanism can be selected from a vehicle, a ship, a spacecraft and the like. The electric mechanism may be powered by the battery pack 200 described above. Thus, it also has an advantage of high safety performance.

The embodiment of the utility model provides an equipment of manufacturing battery module still is used for making foretell battery package 200. Which includes a providing module and a mounting module. The providing module is used for providing a battery pack box 100 and a plurality of battery cells 201, wherein the battery pack box 100 comprises a box body 101 and a plurality of pressure relief sheets 107; the box body 101 is provided with an accommodating space 102, and a plurality of pressure relief ports 105 are arranged on the box body 101 at intervals; the mounting module is used for correspondingly sealing the plurality of pressure relief sheets 107 with the plurality of pressure relief ports 105 one by one, wherein the pressure relief sheets 107 are configured to be in a sealed state when the internal pressure and the external pressure of the accommodating space 102 are the same, and are cracked to relieve pressure when the pressure in the accommodating space 102 is higher than a preset pressure; and is used for stacking a plurality of battery cells 201 in the accommodating space 102. The apparatus for manufacturing a battery module can manufacture the above-described battery pack 200 having high safety.

It should be noted that, in the embodiment of the present invention, the apparatus for manufacturing the battery module is an apparatus for providing and installing to form the battery pack 200, the structure and the operation principle of which are adjusted and changed along with the structural design of the battery pack 200, for example, when the battery module of the battery pack 200 includes a plurality of battery cells 201 stacked in a stacked manner, the providing module includes a manufacturing structure for manufacturing the battery cells 201, the installing module includes a stacked structure for stacking the battery cells 201 in the housing 209, and for example, when the sealing plate 110 of the battery pack case 100 is provided with the exhaust passage 111, the providing module includes a molding structure for molding the exhaust passage 111 in the sealing plate 110, and the installing module includes an installing structure for installing the sealing plate 110 at the first opening of the case body 101 and making the inlet 118 opposite to the safety valve 207 of the battery cells 201. To some other relevant structures outside providing module and the installing module of the equipment of making battery module, for example electric core 201 and module washing structure, welded structure, module test and detection structure etc. the embodiment of the utility model is no longer repeated.

The following describes the installation process, working principle and beneficial effects of the battery pack 200 according to the embodiment of the present invention in detail:

when the battery pack 200 is mounted, the plurality of pressure relief pieces 107 may be integrated into the plurality of pressure relief openings 105 of the first side beam 103 in a one-to-one correspondence manner, and the first side beam 103 and the second side beam 104 may be assembled to form a frame body; then, the closing plate 110 is closed at the first opening arranged at the lower end of the box body 101, and the exhaust channel 111 in the closing plate 110 is communicated with the communication chamber through the opening 131 of the first edge beam 103; then, the water-cooling plate 211 is placed on the closing plate 110 such that the through holes 213 of the water-cooling plate 211 are opposite to the inlets 118 of the closing plate 110 one by one; finally, the battery cells 201 are stacked in the housing 209 to form a battery module, and the battery module is supported on the water-cooling plate 211, so that the safety valve 207 of each battery cell 201 can be inserted into the corresponding inlet 118 through the corresponding through hole 213.

In the above process, on one hand, the battery pack case 100 can sufficiently release the pressure when the pressure in the battery pack case 100 is high by arranging the plurality of pressure release sheets 107 which can be cracked, so that the pressure release efficiency and quality can be ensured, and the safety performance can be improved; on the other hand, pressure release piece 107 carries out the setting of pressure release through the rupture mode, compares in relief valve or explosion-proof valve, and the cost is lower, and occupation space is littleer, can improve battery package 200's space utilization, reduces battery package 200's inefficacy risk.

To sum up, the embodiment of the utility model provides a can utilize battery package box 100 self structure to carry out battery package box 100 and battery package 200 of explosion-proof pressure release, it has the advantage that the security performance is high, still has advantage with low costs. An embodiment of the utility model provides a power consumption device, it supplies power through foretell battery package 200. Therefore, the safety device also has the advantages of high safety performance and low cost. The embodiment of the utility model provides an equipment of manufacturing battery package 200, it can prepare and obtain above-mentioned security performance height, battery package 200 with low costs.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A battery pack box, its characterized in that includes:

the pressure relief piece is arranged in one-to-one correspondence with the pressure relief openings, each pressure relief piece is used for sealing the corresponding pressure relief opening, the pressure relief piece is configured to be in a closed state when the pressure inside and outside the accommodating space is the same, and the pressure relief piece cracks to relieve pressure when the pressure inside the accommodating space is larger than a preset pressure.

2. The battery pack case according to claim 1, characterized in that:

along the pressure relief direction, the thickness of pressure relief piece is less than the wall body thickness of case body.

3. The battery pack case according to claim 1, characterized in that:

the box body is made of aluminum or steel metal materials, and the pressure relief sheet is made of plastic materials;

or,

the box body is made of 5 or 6 series aluminum alloy materials, and the pressure relief sheet is made of 2 or 3 series aluminum alloy materials.

4. The battery pack case of claim 1, wherein:

one side of the pressure relief sheet, which is far away from the accommodating space, is provided with a groove which is sunken towards the direction of the accommodating space.

5. The battery pack case according to claim 4, wherein:

the number of the grooves is one or more, and the grooves are in a linear long strip shape or an arc shape.

6. The battery pack case according to claim 5, wherein:

when the number of the grooves is multiple, the grooves are parallel and arranged at intervals, or at least two of the grooves are intersected or tangent.

7. The battery pack case according to any one of claims 1 to 6, wherein:

the two ends of the accommodating space are respectively provided with a first opening and a second opening, the battery pack box body further comprises an exhaust channel located at the first opening, the exhaust channel is arranged in the accommodating space and is provided with an inlet and an outlet, the inlet faces the second opening and is used for accommodating molten substances in the accommodating space, and the outlet is communicated with the pressure relief ports.

8. The battery pack case according to claim 7, wherein:

the exhaust channel is provided with a plurality of inlets which are arranged at intervals;

and/or the presence of a gas in the gas,

the battery pack box is internally provided with a plurality of exhaust channels, and each exhaust channel is provided with at least one inlet and at least one outlet.

9. The battery pack case of claim 7, wherein:

the box body is provided with a communication chamber which is communicated with the circumferential direction, the pressure relief ports are arranged on the circumferential side of the communication chamber at intervals, and the outlet of the exhaust channel is communicated with the communication chamber;

or,

the two ends of the exhaust channel are respectively connected with the two boundary beams of the box body, a cavity is arranged in each boundary beam, the two ends of the exhaust channel are respectively provided with one outlet, the two outlets are communicated with the two cavities in a one-to-one correspondence mode, and each cavity is provided with at least one pressure relief opening.

10. The battery pack case according to claim 9, wherein:

the box body comprises two first edge beams and two second edge beams, the two first edge beams are arranged in parallel at intervals, and the two second edge beams are arranged between the two first edge beams in parallel at intervals;

the first edge beam is provided with a first long cavity in a penetrating manner, the second edge beam is provided with a second long cavity in a penetrating manner, the second long cavity is communicated with the first long cavity, and the two first long cavities are communicated with the two second long cavities to form a communicated cavity; each first long cavity is provided with an opening;

the two ends of the exhaust channel are respectively provided with one outlet, the two ends of the exhaust channel are respectively connected with the two first edge beams, and the outlets are communicated with the adjacent openings.

11. The battery pack case according to claim 7, wherein:

the box body further comprises a sealing plate used for sealing the first opening, the sealing plate comprises a first plate and a second plate which are arranged at intervals along the direction from the first opening to the second opening, the first plate forms a bottom plate of the battery pack box body, the second plate is used for opening the inlet, and the first plate and the second plate together form the exhaust channel.

12. The battery pack case according to claim 11, wherein:

the closed plate further comprises a plurality of partition plates, the partition plates are arranged between the first plate and the second plate in parallel at intervals, one side of each partition plate is connected with the first plate, the other side of each partition plate is connected with the second plate, and any two adjacent partition plates, the first plate and the second plate form one exhaust channel together.

13. A battery pack, comprising:

the battery pack case of any one of claims 1 to 12;

and the battery cores are stacked in the accommodating space.

14. The battery pack according to claim 13, wherein:

the battery pack box body further comprises an exhaust channel, the exhaust channel is arranged in the accommodating space and is provided with an inlet and an outlet, the inlet is used for receiving molten substances sprayed out of the battery core, and the outlet is communicated with the pressure relief ports;

the safety valve of each battery cell is positioned on one side of the battery cell, which faces the inlet.

15. The battery pack according to claim 14, wherein:

the exhaust channel is provided with a plurality of inlets matched with the electric cores in number, and each safety valve is opposite to the corresponding inlet or can extend into the corresponding inlet.

16. The battery pack according to claim 15, wherein:

the safety valve is arranged on the end face of the battery cell in a protruding mode, the safety valve can extend into the corresponding inlet, the end face of one end, provided with the safety valve, of the battery cell is supported on the exhaust channel, and the corresponding inlet is sealed;

or,

the safety valve is recessed in the end face of the battery cell, the safety valve is opposite to the inlet and is arranged at intervals, and the battery cell is circumferentially supported on the exhaust channel at one end of the safety valve and seals the corresponding inlet.

17. The battery pack of claim 16, wherein:

the safety valve is convexly arranged on the end surface of the battery cell; the battery pack further comprises a water cooling plate, the water cooling plate is arranged in the accommodating space and arranged between the end face of the battery cell provided with the safety valve and the exhaust channel, through holes opposite to the safety valves are formed in the water cooling plate, and each safety valve can penetrate through the through hole and extend into the corresponding inlet.

18. The battery pack according to claim 14, wherein:

and a positive pole column and a negative pole column are arranged on one side, away from the safety valve, of the battery cell.

19. An electric device, comprising:

an electricity utilization mechanism;

the battery pack of any one of claims 13 to 18 for powering the electricity consuming mechanism.

20. An apparatus for manufacturing a battery pack, comprising:

the mounting module is used for correspondingly sealing the pressure relief sheets from the pressure relief ports one by one, the pressure relief sheets are configured to be in a sealed state when the pressure inside and outside the accommodating space is the same, and the pressure relief sheets are cracked to release pressure when the pressure inside the accommodating space is greater than a preset pressure; and the battery cores are stacked and arranged in the accommodating space.