CN218525661U

CN218525661U - Battery pack shell, battery pack and energy storage system

Info

Publication number: CN218525661U
Application number: CN202221031341.1U
Authority: CN
Inventors: 陈孟奇; 雷政军; 翟腾飞; 赵小青
Original assignee: China Australia Energy Storage Power Technology Xi'an Co ltd
Current assignee: China Australia Energy Storage Power Technology Xi'an Co ltd
Priority date: 2022-04-29
Filing date: 2022-04-29
Publication date: 2023-02-24
Anticipated expiration: 2032-04-29

Abstract

The utility model discloses a battery pack housing, battery pack housing include the casing body, locate this internal battery of casing and hold chamber and flue gas absorption chamber, and the battery holds the intracavity and still is equipped with the flue gas passageway, and the flue gas adsorbs the chamber and is equipped with the trompil, even flue gas adsorbs chamber and flue gas passageway, and the flue gas adsorbs the intracavity and is equipped with adsorption material, and after the battery that holds the intracavity when the battery takes place the thermal runaway, the thermal runaway flue gas passes through the trompil from the flue gas passageway and gets into the flue gas and adsorb the chamber, is adsorbed by adsorption material and filters. The utility model discloses a group battery casing, built-in adsorption material, the flue gas and the moisture that can fully absorb battery thermal runaway production have reduced group battery casing's problem, have improved the security of battery, and shell structure is simple, practices thrift the space. The utility model also discloses a group battery and an energy storage system.

Description

Battery pack shell, battery pack and energy storage system

Technical Field

The utility model relates to a battery technology field especially relates to a group battery casing, group battery and energy storage system

Background

The lithium battery has the characteristics of high voltage, large specific energy, long service life and the like, and is widely applied to multiple fields of power, energy storage and the like. The battery accumulates a large amount of heat and generates gas inside during the charge and discharge processes, and if the battery is continuously overheated and generates gas, it may catch fire or explode, especially in the case where a plurality of unit cells are densely collected in a limited space, such as in the case of a plurality of battery packs, a serious accident may occur.

In order to improve the safety of the battery, at present, a method for treating high-temperature liquid and gas generated during thermal runaway of the battery is often a method in which an adsorption layer is provided inside a single battery or an adsorption device is provided outside a battery case.

Patent CN216213673U discloses a way of providing an adsorption layer and a thermal insulation layer inside a single battery case to adsorb the gases generated inside the battery. Patent CN205881956U discloses a battery case, a battery cover plate and a battery, wherein an adsorption device is disposed on the outer surface of the case, so that the interior of the battery case is communicated with the gas of the adsorption device to absorb the gas and moisture generated by the battery. However, the adsorption effect of the structure is general, and when a plurality of batteries are used, the adsorption device occupies a large space.

How to effectively handle heat and flue gas that produce when the group battery thermal runaway, improve the security of battery is the problem that needs to solve urgently.

Disclosure of Invention

In view of the above, there is a need to provide a battery case that can safely and effectively treat the smoke generated by thermal runaway of the battery pack.

The utility model adopts the technical scheme as follows:

the utility model provides a group battery casing, the thermal runaway flue gas in the adsorbable casing, includes the casing body, locates this internal battery of casing and holds the chamber and the flue gas adsorbs the chamber, the battery holds the intracavity and still is equipped with the flue gas passageway, the flue gas adsorbs the chamber and is equipped with the trompil, so that the flue gas adsorb the chamber with flue gas passageway intercommunication, the flue gas adsorbs the intracavity and is equipped with adsorption material, works as after the battery that the battery held the intracavity takes place the thermal runaway, the thermal runaway flue gas is followed the flue gas passageway passes through the trompil gets into the flue gas adsorbs the chamber, quilt adsorption material adsorbs the filtration.

Preferably, the flue gas channel and the flue gas adsorption cavity form a U-shaped channel.

Preferably, the flue gas adsorption cavity comprises a first adsorption cavity and a second adsorption cavity, the first adsorption cavity is filled with a first adsorption material, and the second adsorption cavity is filled with a second adsorption material.

Preferably, the first adsorbent material is one of porous silica, molecular sieve, porous ceramic alumina and adsorbent resin, and the second adsorbent material is activated carbon.

Preferably, the first adsorption chamber and the second adsorption chamber are both provided with a porous plate, the porous plates are used for compressing the first adsorption material and the second adsorption material, and fasteners are arranged in the first adsorption chamber and the second adsorption chamber to connect and fasten the porous plates in the first adsorption chamber and the second adsorption chamber.

Preferably, the flue gas adsorption cavity is provided with an exhaust hole, the exhaust hole is arranged at one end, far away from the opening, of the adsorption cavity, and the flue gas adsorption cavity is communicated with the outside of the shell through the exhaust hole.

Preferably, a one-way sealing element is arranged on the exhaust hole, and when the pressure of the gas in the adsorption cavity reaches the pressure threshold value of the one-way sealing element, the one-way sealing element is opened.

Preferably, an air collecting bag is arranged on the exhaust hole to collect the gas exhausted from the adsorption cavity.

In order to solve the technical problem, the utility model provides an another technical scheme is, a group battery, including above-mentioned battery case and a plurality of group battery, the group battery is arranged in the battery holds the intracavity.

In order to solve the above technical problem, the present invention provides another technical solution, which is an energy storage system, including at least one of the above battery packs.

Compared with the prior art, the beneficial effects of the utility model are that:

1. this patent is through setting up the flue gas absorption chamber in that the group battery casing is inside, when the battery of battery intracavity portion takes place the thermal runaway, the thermal runaway flue gas and the moisture of production reachs the flue gas absorption chamber through shorter route, have reduced the aggregation time of heat in the battery.

2. Adsorbing material is under the extrusion of perforated plate, closely fills in the flue gas adsorption cavity, and thermal runaway flue gas and moisture can be fully absorbed when adsorbing material, have reduced combustible gas and total tolerance by a wide margin, have reduced the temperature in the casing, have further guaranteed the security performance of battery, and the gas of discharging in the environment can reach colorless tasteless incombustible effect, has avoided the battery to lead to the explosion because of thermal runaway, secondary disasters such as catching fire have also reduced the pollution to the environment.

3. The adsorbing materials are arranged in the battery pack shell, so that redundant space does not need to be occupied, and the use is convenient.

Drawings

FIG. 1 is a cross-sectional view of a battery pack case structure in one embodiment;

FIG. 2 is a perspective view of a battery pack housing in one embodiment;

FIG. 3 is a schematic cross-sectional view of a battery housing having two adsorption chambers in one embodiment;

FIG. 4 is a schematic perspective view of a battery pack having two adsorption chambers according to an embodiment;

1-shell body 2-battery accommodating cavity 3-single battery 4-open hole 5-smoke adsorption cavity 51-first adsorption cavity 52-second adsorption cavity 6-adsorption material 7-porous plate 8-vent hole 9-fastener

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Hereinafter, the battery case of the present invention is specifically disclosed with reference to the drawings in detail, and the battery case has a smoke adsorbing chamber therein, but the detailed description is not necessarily omitted. For example, detailed descriptions of already known matters and repetitive descriptions of actually the same configurations may be omitted. This is to avoid unnecessarily obscuring the following description, and to facilitate understanding by those skilled in the art. The drawings and the following description are provided for those skilled in the art to fully understand the present invention, and are not intended to limit the subject matter recited in the claims.

All embodiments and alternative embodiments of the invention may be combined with each other to form new solutions, if not specifically stated. All the technical features and optional technical features of the invention can be combined with each other to form a new technical solution, if not specifically stated.

The terms "comprises" and "comprising" as used herein mean open and closed unless otherwise specified. For example, "comprising" and "comprises" may mean that other components not listed may also be included or included, or that only listed components may be included or included.

It is understood that relational terms such as "first," "second," and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

The above summary of the present invention is not intended to describe each disclosed embodiment or every implementation of the present invention. The following description more particularly exemplifies illustrative embodiments. At various points throughout this application, guidance is provided through lists of examples, which examples can be used in various combinations. In each instance, the list is merely a representative group and should not be construed as exhaustive.

Example 1

As shown in figure 1, a group battery casing, including casing body 1, there are the battery to hold chamber 2 and flue gas absorption chamber 5 in the casing body 1, and the battery holds the intracavity and is used for holding battery cell 3, and the arrow shows to be the flue gas passageway, and the flue gas absorption chamber is equipped with trompil 4, and the battery holds the chamber and the flue gas absorption chamber passes through trompil 4 intercommunication. The flue gas adsorbs and has adsorbing material 6 in the chamber 5, in this embodiment, flue gas passageway and flue gas hold the chamber and form the U-shaped passageway, and adsorbing material is silica, molecular sieve, porous ceramic alumina, adsorption resin and active carbon, still is equipped with perforated plate 7 in the flue gas adsorption chamber, presss from both sides tightly in adsorbing material's both ends, with the perforated plate at the fixed both ends of fastener 9, adsorbing material can closely fill in flue gas adsorption chamber 5 for flue gas fully contacts adsorbing material, helps improving adsorption effect. When the battery in the battery holds the chamber takes place the thermal runaway, the thermal runaway flue gas and the moisture of production, through flue gas passageway and trompil 4 entering flue gas absorption chamber 5 in, the adsorption material in the flue gas absorption chamber, combustible gas and moisture in the absorption flue gas, combustible gas's concentration and temperature in the casing body have been reduced, the risk that combustible gas and oxygen emergence effect arouse the burning has been reduced, this internal gas volume of casing reduces after adsorbing, and gaseous colorless tasteless, harmless to the environment, outside through 8 exhaust holes of exhaust casing, and then the security of battery has been improved.

Because the adsorption material sets up inside battery case, thermal runaway flue gas and moisture reach the flue gas absorption chamber promptly through shorter route, have reduced the time that the heat persists in the casing inside, have further improved the security of battery.

Example 2

As shown in fig. 3 and 4, a battery pack housing comprises a housing body 1, wherein a battery accommodating cavity 2 and a smoke adsorption cavity are arranged in the housing body 1, the smoke adsorption cavity comprises a first adsorption cavity 51 and a second adsorption cavity 52, the battery accommodating cavity is used for accommodating a single battery 3, an arrow indicates a smoke channel, the smoke adsorption cavity is further provided with an opening 4, and the battery accommodating cavity is communicated with the smoke adsorption cavity through the opening 4. The first adsorption cavity 51 is filled with first adsorption material, the second adsorption cavity 52 is filled with second adsorption material, in this embodiment, flue gas channel and flue gas hold the chamber and form the U-shaped passageway, first adsorption material is silica, molecular sieve, porous ceramic alumina, among the adsorption resin, the second adsorption material is active carbon, first adsorption cavity and second adsorption cavity both ends all are equipped with perforated plate 7, the perforated plate at both ends is fixed to fastener 9, make adsorption material closely fill in two flue gas adsorption cavities, help improving adsorption effect, when the battery holds the battery in the chamber and takes place the thermal runaway, the thermal runaway flue gas and the moisture of production, pass through first adsorption cavity 51 and second adsorption cavity 52 through flue gas channel and trompil 4 in proper order, first adsorption cavity mainly adsorbs flue gas particulate matter and combustible gas, the second adsorption cavity mainly adsorbs moisture, combustible gas's concentration and temperature in the casing body have been reduced, the risk that combustible gas and oxygen exhaust hole arouse the burning has been reduced, this internal gas volume of casing is few after the absorption, and gas is tasteless, and then the environment is harmless, the outside harmless improvement of battery has been through colorless.

The position of first adsorption cavity and second adsorption cavity can be exchanged in this embodiment, also can set up more than two adsorption cavity in the adsorption cavity, different adsorption cavity can fill different adsorption material and realize different adsorption effect, in order to make the interior adsorption material of adsorption cavity closely fill, the perforated plate in the adsorption cavity not only can locate adsorption cavity both ends, also can locate a plurality of perforated plates in the middle of the adsorption cavity, fix it with the fastener, this technical scheme that all technical personnel in the field thought easily.

In one embodiment, a one-way membrane is provided at the vent 8, which opens and vents gas when the gas pressure in the adsorption chamber reaches the pressure threshold of the membrane.

In one embodiment, an air collecting bag is arranged at the exhaust hole 8, so that the adsorbed smoke can be collected, and the environment pollution is avoided.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a group battery casing, its characterized in that includes the casing body, locates this internal battery of casing and holds chamber and flue gas adsorption cavity, the battery holds the intracavity and still is equipped with flue gas channel, flue gas adsorption cavity is equipped with the trompil, the intercommunication flue gas adsorption cavity with flue gas channel, flue gas adsorption cavity is equipped with adsorption material, works as battery holds the battery emergence thermal runaway back of intracavity, and the thermal runaway flue gas is followed flue gas channel passes through the trompil gets into flue gas adsorption cavity, quilt adsorption material adsorbs the filtration.

2. The battery pack housing of claim 1, wherein the flue gas channel forms a U-shaped channel with the flue gas adsorption cavity.

3. The battery pack housing according to claim 1, wherein the flue gas adsorption chamber comprises a first adsorption chamber filled with a first adsorbent material and a second adsorption chamber filled with a second adsorbent material.

4. The battery pack housing of claim 3, wherein the first adsorbent material is one of porous silica, molecular sieve, porous ceramic, alumina, adsorbent resin, and the second adsorbent material is activated carbon.

5. The battery pack case according to claim 3, wherein porous plates are disposed at two ends of the first adsorption chamber and the second adsorption chamber, the porous plates are used for compressing the first adsorption material and the second adsorption material, and fasteners are disposed in the first adsorption chamber and the second adsorption chamber to connect and fasten the porous plates in the chambers.

6. The battery pack case according to claim 1, wherein the smoke adsorption chamber is provided with a vent hole provided at an end of the adsorption chamber remote from the opening hole, the smoke adsorption chamber communicating with the outside of the case through the vent hole.

7. The battery pack case according to claim 6, wherein the vent hole is provided with a one-way sealing member which opens when the gas pressure in the adsorption cavity reaches a pressure threshold of the one-way sealing member.

8. The battery pack case as set forth in claim 6, wherein a gas collecting pocket is provided on the gas exhaust hole to collect the gas exhausted from the adsorption chamber.

9. A battery pack comprising the battery pack case according to any one of claims 1 to 8 and a plurality of cells, said battery pack being disposed in said cell receiving cavities.

10. An energy storage system comprising at least one battery pack according to claim 9.