CN210744020U - Box, battery pack and device using single battery as power supply - Google Patents

Abstract

The embodiment of the application provides a box body, a battery pack and a device using a single battery as a power supply, wherein the box body comprises a cross beam, and the cross beam divides the box body into a plurality of accommodating spaces; the crossbeam includes main part and filter house, the filter house connect in the main part, just the filter house is located adjacently between the accommodation space. The battery pack comprises a battery module and the box body, and the battery module is accommodated in the accommodating space. The device using the battery cell as the power supply comprises a power source, wherein the power source is used for providing driving force for the device; said battery pack configured to provide electrical energy to said power source. The method achieves the purpose of delaying or even preventing the heat diffusion between the areas.

Description

Box, battery pack and device using single battery as power supply

Technical Field

The application relates to the technical field of energy storage devices, in particular to a box body, and further relates to a battery pack and a device using a battery monomer as a power supply.

Background

When the electric automobile has disastrous accidents such as collision, wading or fire, the power battery, the high-voltage system and the like loaded in the automobile are easy to be excited by the external environment to cause disastrous accidents such as fire and the like. The combustion of the conventional ternary batteries and lithium iron phosphate batteries in electric automobiles has the problems of rapid combustion, long duration, easy re-combustion, high combustion temperature and the like.

The power battery can release a large amount of energy outwards when being out of control. Some of the heat is conducted to the adjacent cells through a heat transfer path, and the heat conducted by the path may cause thermal runaway of the adjacent cells, thereby inducing thermal diffusion behavior of the battery pack. At present, a widely adopted method for the part of energy is to directly place a heat insulation material on the battery and the battery to delay the heat diffusion rate. The other part of energy is contained in the substances sprayed to the outside after the thermal runaway of the power battery, the part of substances contain a large amount of high-temperature active particles, and due to the high temperature of the particles, when the particles flow in the battery pack, the particles possibly damage the assembly of a partial power battery, and cause local internal short circuit of the power battery and even the thermal runaway.

SUMMERY OF THE UTILITY MODEL

In view of the above, embodiments of the present disclosure provide a case, a battery pack and a device using a battery cell as a power source, so as to achieve the purpose of delaying or even preventing heat diffusion between regions.

The embodiment of the application provides a box body, which comprises a cross beam, wherein the cross beam divides the box body into a plurality of accommodating spaces;

the crossbeam includes main part and filter house, the filter house connect in the main part, just the filter house is located adjacently between the accommodation space.

Further, the filter portion includes a first connection portion;

the first connecting portion is connected to an upper side of the main body portion in a height direction (H) of the case.

Furthermore, the first connecting part is provided with a limiting groove which is sunken along the length direction (X) of the box body;

the main body part is provided with a limiting bulge protruding along the length direction (X) of the box body;

the limiting groove is matched with the limiting bulge.

Furthermore, the limiting protrusion protrudes towards the inside of the cross beam;

the limiting groove is sunken towards the inside of the first connecting part;

the limiting protrusion extends into the limiting groove.

Further, the sum of the height (H1) of the main body portion and the height (H2) of the first connecting portion is not lower than the height (H3) of the side rail.

Furthermore, the box body also comprises a frame and a longitudinal beam, and the transverse beam, the longitudinal beam and the frame enclose an accommodating space together;

the crossbeam with be provided with the breach between the frame, the filter house includes second connecting portion, second connecting portion set up in the breach.

Further, the first connecting portion and the second connecting portion are integrally formed.

Further, along the length direction (X) of the box body, reinforcing layers are arranged on two sides of the main body portion.

Further, along the length direction (X) of the box body, heat insulation layers are arranged on two sides of the main body portion.

Further, the filtering part is of a porous structure.

The embodiment of the present application provides a battery pack, it includes: the battery module and the box, the battery module holds in accommodation space.

The embodiment of the application provides a device using a battery cell as a power supply, which comprises a power source, a power supply and a controller, wherein the power source is used for providing driving force for the device; said battery pack configured to provide electrical energy to said power source.

The technical scheme provided by the application can achieve the following beneficial effects:

the box in this application embodiment, be provided with the crossbeam of separating into a plurality of accommodation spaces with the box at box inside, because explosion-proof valve generally sets up the place ahead or the rear at the group battery, for the convenience of the circulation of air flow to explosion-proof valve, consequently, adjacent accommodation space can have the clearance, when battery thermal runaway in an accommodation space, can release a large amount of energy, still can release a large amount of high temperature active particles simultaneously, active particles can get into other accommodation space through the clearance between crossbeam and the box, consequently, set up the filter house in the clearance, can obstruct the circulation of active particles between accommodation space through the setting of filter house, but do not influence the circulation of air. Therefore, the local short circuit or thermal runaway of the battery which normally works is avoided, and the damage to the battery assembly is also avoided.

The application provides a group battery adopts this box, has solved and has caused the damage to power battery group on every side when one of them battery thermal runaway, causes the problem of power battery local internal short circuit even thermal runaway, has also avoided causing the damage to battery equipment.

The application provides an use device of battery monomer as power adopts this kind of group battery, has solved and has caused the damage to power battery group on every side when one of them battery thermal runaway, causes the problem of power battery local internal short circuit even thermal runaway, has also avoided causing the damage to the battery equipment.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a box provided in an embodiment of the present application;

FIG. 3 is a top view of the housing provided in an embodiment of the present application;

FIG. 4 is a front view of the housing provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a longitudinal beam of a box provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a cross beam of the box provided in the embodiment of the present application;

FIG. 7 is a schematic structural diagram of another cross beam of the box provided by the embodiment of the application;

FIG. 8 is a sectional view of the case of the present application taken along line A-A of FIG. 7;

FIG. 9 is a cross-sectional view of a beam filter portion of the housing according to an embodiment of the present disclosure;

FIG. 10 is a cross-sectional view of a main beam portion of a box according to an embodiment of the present invention;

FIG. 11 is a cross-sectional view of another cross-beam of the enclosure provided in an embodiment of the present application.

Description of reference numerals:

p, a battery pack;

100. a box body;

1. a cross beam;

11. a main body portion;

111. a reinforcement layer;

112. a thermal insulation layer;

113. a limiting bulge;

12. a filtering part;

121. a first connection portion;

121a and a limiting groove;

121b, a first face;

121c, a second face;

121d, a third surface;

122. a second connecting portion;

2. a notch;

3. a frame;

4. a stringer;

5. an accommodating space;

200. a cover body.

Detailed Description

For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.

It should be understood that the embodiments described are only a few embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

In one embodiment, the present application is described in further detail below with reference to specific embodiments and accompanying drawings.

A device using a battery cell as a power source comprises a power source, wherein the power source is used for providing driving force for the device; a battery pack P configured to provide electrical energy to the power source. Among them, the device using the battery cell as a power source includes a mobile apparatus such as a vehicle, a ship, a small airplane, etc., the device includes a power source for providing a driving force to the device, and the power source may be configured as a battery pack P for providing electric power to the power source. The driving force of the device may be electric energy, and may also include electric energy and other energy sources (e.g., mechanical energy), the power source may be a battery pack P (or a battery module), and the power source may also be a battery pack P (or a battery module), an engine, and the like. Therefore, a device that can use the battery cell as a power source is within the scope of the present application.

Taking a vehicle as an example, the vehicle in the embodiment of the present application may be a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, and may also be a hybrid electric vehicle or a range-extended vehicle, etc. The vehicle can comprise a battery pack P and a vehicle body, wherein the battery pack P is arranged on the vehicle body, the vehicle body is also provided with a driving motor, the driving motor is electrically connected with the battery pack P, the battery pack P provides electric energy, and the driving motor is connected with wheels on the vehicle body through a transmission mechanism so as to drive the vehicle to move. Specifically, the battery pack P may be horizontally disposed at the bottom of the vehicle body.

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application. As shown in fig. 1, the present embodiment provides a battery pack P, a battery module and a case 100, wherein the case 100 may be made of aluminum, aluminum alloy or other metal materials, and the case 100 has a receiving space 5 therein. In one possible design, the case 100 is an open-top case 100 structure and includes a cover 200, the cover 200 has a size corresponding to that of an opening at the top of the case 100, and the cover 200 can be fixed to the opening by a fixing member such as a bolt, thereby forming the receiving space 5. Meanwhile, in order to improve the sealability of the case 100, a sealing member may be further provided between the cover 200 and the case 100.

One or more than two battery modules can be accommodated in the accommodating space 5 of the box 100, the battery modules can be arranged in the box 100 side by side along the length direction of the battery pack P, or in the width direction of the battery pack P, and each battery module is fixed with the box 100.

In the prior art, when an electric automobile has disastrous accidents such as collision, wading or fire, a large amount of energy can be released outwards due to the out-of-control power battery. A part of released energy is contained in substances sprayed to the outside after the thermal runaway of the power battery, the part of substances contains a large number of high-temperature active particles, and due to the fact that the temperature of the particles is high, when the particles flow in the battery pack, damage is likely to be caused to assembly of a partial power battery, and local internal short circuits and even the thermal runaway of the power battery are caused. The box body, the battery pack and the device using the single battery as the power supply mainly solve the problem that in the prior art, the thermal diffusion inside the battery pack is untimely, and the local internal short circuit and even the thermal runaway of a power battery are caused.

FIG. 2 is a schematic structural diagram of a box provided in an embodiment of the present application; FIG. 3 is a top view of the housing provided in an embodiment of the present application; fig. 4 is a front view of the box provided in the embodiment of the present application. As shown in fig. 2 to 4, the present embodiment provides a box 100, which includes a cross beam 1, the cross beam 1 divides the box 100 into a plurality of accommodating spaces 5, the cross beam 1 includes a main body portion 11 and a filter portion 12, the filter portion 12 is connected to the main body portion 11, and the filter portion 12 is located between adjacent accommodating spaces 5.

It should be noted that, the filter unit 12 is disposed in the gap, and the filter unit 12 is disposed in the gap, so that the explosion-proof valve is generally disposed in front of or behind the battery pack P, and in order to facilitate the air flow to the explosion-proof valve, a gap may exist between adjacent accommodating spaces 5, when the battery in one accommodating space 5 is out of control due to heat, a large amount of energy may be released, and a large amount of high-temperature active particles may be released, and the active particles may enter other accommodating spaces 5 through the gap between the cross beam 1 and the box 100, and therefore, the filter unit 12 is disposed in the gap, and the flow of the active particles between the accommodating spaces 5 may be blocked by the disposition of the filter unit 12, but the air flow is not. Therefore, the local short circuit or thermal runaway of the battery which normally works is avoided, and the damage to the battery assembly is also avoided.

In the embodiment of the present application, fig. 6 is a schematic structural diagram of a cross beam of a box body provided in the embodiment of the present application; FIG. 7 is a schematic structural diagram of another cross beam of the box provided by the embodiment of the application; as shown in fig. 6 and 7, the filter part 12 includes a first connecting part 121, and the first connecting part 121 is connected to the upper side of the main body part 11 along the height direction (H) of the case 100, specifically, referring to fig. 6, the direction of the arrow is the direction from the bottom to the top of the case 100, that is, the direction from the bottom to the top of the main body part 11.

It should be noted that, at this time, the filter part 12 and the main body part 11 are of a split structure, and along the height direction (H) of the box 100, when the gap between the main body part 11 and the box 100 is only located above the main body part 11, only the first connection part 121 needs to be arranged above the main body part 11, and the high-temperature active particles are filtered by the first connection part 121, so that damage of the active particles in the high-temperature airflow to the battery which is not thermally runaway is reduced or prevented.

In this case, the fixing method between the main body 11 and the filter part 12 may be a nesting method, a snap, a welding method, a bolt method, or the like, and a nesting method is generally adopted, and an "i" shaped nesting structure is preferable, that is, a nesting method as shown in fig. 8.

Specifically, fig. 8 is a sectional view of the box body provided in the embodiment of the present application, taken along the direction a-a in fig. 7; FIG. 9 is a cross-sectional view of a beam filter portion of the housing according to an embodiment of the present disclosure; fig. 10 is a cross-sectional view of a beam main body portion of a box according to an embodiment of the present application. As shown in fig. 8 to 10, the first connection portion 121 is provided with a stopper groove 121a recessed in the length direction (X) of the case 100, the main body portion 11 is provided with a stopper protrusion 113 protruding in the length direction (X) of the case 100, and the stopper groove 121a is engaged with the stopper protrusion 113. The first connecting part 121 is fixed above the main body part 11 by clamping the limiting groove 121a and the limiting protrusion 113, so that the first connecting part 121 is prevented from falling off from the main body part 11.

More specifically, as shown in fig. 10, the limiting projection 113 projects toward the inside of the cross member 1, as shown in fig. 9, the limiting groove 121a is recessed toward the inside of the first connecting portion 121, and as shown in fig. 8, the limiting projection 113 extends into the limiting groove 121 a. Through spacing recess 121a and spacing protruding 113 joint, avoid spacing protruding 113 and spacing recess 121a to occupy the outside space of crossbeam 1, and then can avoid spacing recess 121a and spacing protruding 113 to occupy the space inside accommodation space 5, consequently can reserve sufficient space for battery module.

More specifically, the sum of the height (H1) of the main body portion 11 and the height (H2) of the first connecting portion 121 is not lower than the height (H3) of the side member 4. After the box 100 is assembled, the sum of the height (H1) of the body 11 and the height (H2) of the first connection portion 121 is higher than the height of the side member 4, and after the lid 200 is engaged, the first connection portion 121 can be compressed, and at this time, the sum of the height (H1) of the body 11 and the height (H2) of the first connection portion 121 is the same as the height of the side member 4, thereby ensuring that the cross member 1 and the side member 4 are in contact with the lid 200.

It should be noted that, as shown in fig. 9, the limiting groove 121a includes a first surface 121b, a second surface 121c, and a third surface 121d, the first surface 121b and the third surface 121d are perpendicular to the second surface 121c, and the width (H4) of the third surface 121d is not less than 2mm, so that the limiting groove 121a and the limiting protrusion 113 are clamped more firmly.

In the embodiment of the present application, as shown in fig. 2 and fig. 6, the box 100 further includes a frame 3 and a longitudinal beam 4, the cross beam 1, the longitudinal beam 4 and the frame 3 enclose into the accommodating space 5 together, a gap 2 is provided between the cross beam 1 and the frame 3, the filter part 12 includes a second connecting part 122, the second connecting part 122 is provided in the gap 2, gas in one accommodating space 5 is prevented from entering the adjacent accommodating space 5 through the diameter of the gap 2, the circulation of active particles between the accommodating spaces 5 is blocked through the second connecting part 122, but the circulation of air is not affected, and the local short circuit or the thermal runaway of the battery in normal operation is avoided.

Specifically, as shown in fig. 6 and 7, the first connection portion 121 and the second connection portion 122 are integrally formed, so that the firmness of the first connection portion 121 and the second connection portion 122 is improved.

The first connection portion 121 and the second connection portion 122 are disposed according to the internal structure of the housing 100, as shown in fig. 2, the first connection portion 121 and the second connection portion 122 need to be disposed at the same time for blocking the circulation of the active particles between the accommodating spaces 5, or only the first connection portion 121 or the second connection portion 122 (not shown) may be disposed as long as the circulation of the active particles between the accommodating spaces 5 can be blocked, but the circulation of air is not affected.

The height of the main body portion 11 is close to the height of the battery module, and the main body portion 11 is mainly used for blocking the battery modules in the adjacent receiving spaces 5.

In the embodiment of the present application, fig. 11 is a cross-sectional view of another cross beam of the box body provided in the embodiment of the present application. As shown in fig. 11, reinforcing layers 111 are provided on both sides of the body portion 11 along the longitudinal direction (X) of the case 100. At this time, the main body 11 and the filter part 12 are formed in an integrated structure, so that the reinforcing layer 111 is provided outside the main body 11 to play a role of reinforcement, and the filter part 12 is used to block the flow of the active particles between the accommodating spaces 5.

In the embodiment of the present application, as shown in fig. 10, heat insulating layers 112 are disposed on two sides of the main body portion 11 along the length direction (X) of the box body 100, and are used for blocking heat between adjacent accommodating spaces 5 and avoiding heat transfer.

Specifically, the filter part 12 has a porous structure, and can filter high-temperature active particles, so that damage of the active particles in high-temperature airflow to the battery without thermal runaway is reduced or prevented. The foam Al is used as a filtering material, and has the functions of heat insulation, flame retardance, filtering and the like.

More specifically, the material of the filter portion 12 generally has a thermal conductivity not higher than 0.3W/(mK) and is capable of allowing gas to flow therethrough at a flow rate of at least 10L/s.

It should be noted that the material of the filtering portion 12 may also be a porous structure such as a wire mesh, and the porosity is between 50% and 90%, and the pore diameter is between 0.1mm and 2 mm.

In the battery pack P, the battery module, and the case 100 according to this embodiment, the case 100 has a receiving space 5 therein, and the battery module is received in the receiving space 5. When electric automobile bumps, wades into water or when calamity accidents such as conflagration take place, power battery out of control can outwards release a large amount of energy, and battery module in the one or more accommodation space in the box can release a large amount of energy this moment. In the embodiment, the filter part 12 is arranged to filter the high-temperature active particles, but the air circulation is not influenced, and the damage of the active particles in the high-temperature airflow to the battery which is not thermally runaway is reduced or prevented. Therefore, the local short circuit or thermal runaway of the battery which normally works is avoided, and the damage to the battery assembly is also avoided.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (12)

1. A cabinet (100), comprising: the box body (100) is divided into a plurality of accommodating spaces (5) by the cross beam (1);

the beam (1) comprises a main body part (11) and a filter part (12), the filter part (12) is connected to the main body part (11), and the filter part (12) is located between the adjacent accommodating spaces (5).

2. Tank (100) according to claim 1, characterized in that said filtering portion (12) comprises a first connection portion (121);

the first connecting portion (121) is connected to the upper side of the main body portion (11) in the height direction (H) of the case (100).

3. The cabinet (100) according to claim 2, wherein the first connection portion (121) is provided with a stopper groove (121a) recessed in a length direction (X) of the cabinet (100);

the main body part (11) is provided with a limiting bulge (113) protruding along the length direction (X) of the box body (100);

the limiting groove (121a) is matched with the limiting protrusion (113).

4. A tank (100) according to claim 3, wherein said stop lug (113) projects towards the inside of said crosspiece (1);

the limiting groove (121a) is recessed towards the inside of the first connecting part (121);

the limiting protrusion (113) extends into the limiting groove (121 a).

5. A box (100) according to claim 2, further comprising a side frame (3) and a longitudinal beam (4), wherein the transverse beam (1), the longitudinal beam (4) and the side frame (3) jointly enclose a containing space (5);

crossbeam (1) with be provided with breach (2) between frame (3), filtering part (12) include second connecting portion (122), second connecting portion (122) set up in breach (2).

6. A cabinet (100) as claimed in claim 5, wherein the sum of the height (H1) of the main body portion (11) and the height (H2) of the first connecting portion (121) is not lower than the height (H3) of the longitudinal beams (4).

7. A cabinet (100) as claimed in claim 5, wherein the first connecting portion (121) and the second connecting portion (122) are integrally formed.

8. A tank (100) according to claim 1, wherein reinforcing layers (111) are provided on both sides of the main body portion (11) in a length direction (X) of the tank (100).

9. A cabinet (100) according to claim 1, wherein the main body portion (11) is provided with insulation layers (112) on both sides in a longitudinal direction (X) of the cabinet (100).

10. Tank (100) according to claim 1, characterized in that said filtering portion (12) is of a porous structure.

11. A battery pack, comprising: a battery module housed in the housing space (5), and the case (100) of any one of claims 1 to 10.

12. A device using a battery cell as a power source is characterized by comprising a power source, a power source and a controller, wherein the power source is used for providing driving force for the device; the battery pack of claim 11 configured to provide electrical energy to the power source.

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