CN215816252U

CN215816252U - Battery system

Info

Publication number: CN215816252U
Application number: CN202122257113.8U
Authority: CN
Inventors: 燕正保
Original assignee: Eve Energy Co Ltd; Hubei Eve Power Co Ltd
Current assignee: Eve Energy Co Ltd; Hubei Eve Power Co Ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-02-11
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a battery system, belongs to the technical field of batteries, and is designed for solving the problems of poor safety and the like of the conventional battery system. The battery system comprises a plurality of battery cells with pressure release valves arranged transversely, all the battery cells form at least two modules, an exhaust channel extending transversely is formed between every two adjacent modules, and an explosion-proof valve is arranged at the end head of at least one side of each exhaust channel. The battery system greatly reduces the length of a path required by high-temperature and high-pressure gas to pass when the high-temperature and high-pressure gas is discharged, accelerates the exhaust speed and has stronger exhaust capacity; the end of each exhaust channel is provided with an explosion-proof valve, so that high-temperature and high-pressure gas in the exhaust channel can be released in time when the battery system is out of control due to thermal runaway, thermal diffusion in the battery system is avoided, and the battery system is safer to use.

Description

Battery system

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery system.

Background

Be provided with a plurality of modules in the battery package usually, every module includes a plurality of electric cores, and whole electric cores are arranged according to certain law.

In order to avoid because battery core thermal runaway back high temperature high pressure gas can take place to strike upper cover or base, there is a both sides utmost point post module now. The battery cell pressure release valves are transversely arranged, and high-temperature and high-pressure gas can be discharged from the side surface when thermal runaway occurs, so that direct impact on the upper cover or the base is avoided.

The defects of the two-side outgoing pole module include: the cell pressure release valve is over against the adjacent module, and once thermal runaway occurs, high-temperature and high-pressure gas possibly impacts the cell of the adjacent module, so that the risk of triggering thermal diffusion exists; the battery pack explosion-proof valves are unreasonable in arrangement position and small in quantity, so that the exhaust passages in the battery packs are long, and quick exhaust of gas is not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a battery system which is safer to use.

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

the utility model provides a battery system, includes a plurality of electric cores that the relief valve transversely arranged, all two at least modules are constituteed to the electric core, adjacent two form along the exhaust passage of horizontal extension between the module every at least one side end of exhaust passage is provided with explosion-proof valve.

Particularly, the battery system further comprises an upper box body, the upper box body comprises a top cover and a side face vertically extending downwards along the side edge of the top cover, and the explosion-proof valve is installed on the side face of the upper box body.

Particularly, the battery system further comprises a lower box body, the module is fixed on the lower box body, and an accommodating space for accommodating the module is formed after the upper box body and the lower box body are buckled.

Particularly, a module fixing portion for limiting the module is formed on the lower case.

Particularly, all the battery cores form three modules respectively, four exhaust passages extending transversely are formed between the adjacent two modules and between the modules at the edge and the side face of the upper box body in total, and the explosion-proof valves are arranged at the end heads of the same side of all the exhaust passages respectively.

In particular, all of the exhaust passages are independent of each other.

Particularly, the setting directions of the pressure relief valves of two adjacent battery cores are opposite.

In particular, the explosion-proof valve is a waterproof sealing explosion-proof valve.

Particularly, the battery cell is a battery cell with two side pole outgoing poles.

In particular, at least one side end of each exhaust channel is provided with a plurality of explosion-proof valves in series.

According to the battery system, the exhaust channel is formed between the two modules, so that the length of a path required by high-temperature and high-pressure gas to pass when the high-temperature and high-pressure gas is discharged is greatly reduced, the exhaust speed is increased, and the exhaust capacity is stronger; the end of each exhaust channel is provided with an explosion-proof valve, so that high-temperature and high-pressure gas in the exhaust channel can be released in time when the battery system is out of control due to thermal runaway, thermal diffusion in the battery system is avoided, and the battery system is safer to use.

Drawings

Fig. 1 is a schematic structural diagram of a battery system according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a sectional view taken along line B-B of FIG. 2;

fig. 4 is a schematic structural diagram of an explosion-proof valve provided by the embodiment of the utility model.

In the figure:

1. an electric core; 2. a module; 3. an exhaust passage; 4. an explosion-proof valve; 5. a lower box body; 41. a valve body; 42. mounting a column; 43. and (4) exhausting holes.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The present embodiment provides a battery system. As shown in fig. 1 to 4, the battery system includes a plurality of battery cells 1 with pressure relief valves arranged transversely, at least two modules 2 are formed by all the battery cells 1, a gas exhaust channel 3 extending transversely is formed between two adjacent modules 2, and an explosion-proof valve 4 is arranged at an end of at least one side of each gas exhaust channel 3.

An exhaust channel 3 is formed between the two modules 2 of the battery system, so that the length of a path required by high-temperature and high-pressure gas to be exhausted is greatly reduced, the exhaust speed is increased, and the exhaust capacity is stronger; the end of each exhaust channel 3 is provided with an explosion-proof valve 4, so that high-temperature and high-pressure gas in the exhaust channel 3 can be released in time when the battery system is out of control due to thermal runaway, thermal diffusion in the battery system is avoided, and the use is safer.

The specific structure of the explosion-proof valve 4 is not limited, and the valve-shaped explosion-proof structure capable of playing a role of exhausting in the prior art can be adopted. The explosion-proof valve 4 is preferably a mechanical pressure release valve, and has the advantage of recycling compared with a pressure release film, so that the use cost is lower, and the use is more convenient.

On the basis of the above structure, the battery system further includes an upper case (not shown), and the upper case includes a top cover and a side surface extending vertically downward along a side edge of the top cover, that is, the upper case is a box-shaped structure with an open lower end. The anti-explosion valve 4 is arranged on the side surface of the upper box body, the installation is convenient, and the anti-explosion valve 4 cannot interfere with other structures in the battery system.

On the basis of the structure, the battery system further comprises a lower box body 5 used for bearing the weight of the module 2, and the module 2 is fixed on the lower box body 5 through connecting pieces such as bolts. The lower box body 5 is preferably of a plate-shaped structure, and the upper box body and the lower box body 5 are buckled to form an accommodating space for accommodating the module 2. In order to improve the safety, after the upper box body and the lower box body 5 are buckled, the lower box body 5 cannot shield the position of the explosion-proof valve 4 on the upper box body. Specifically, an avoiding through hole or an avoiding groove can be formed in the lower box body 5, and the explosion-proof valve 4 is just aligned to the avoiding through hole or the avoiding groove after installation, so that high-temperature and high-pressure gas can be discharged out of the battery system from the explosion-proof valve 4 without obstruction.

In order to fix the module 2 more favorably, a module fixing portion for limiting the module 2 is formed on the lower case 5. The specific structure of the module fixing part is not limited, and the module fixing part can be a convex edge protruding out of the upper surface of the lower box body 5, or a concave part lower than the upper surface of the lower box body 5, and can limit the module 2.

The concrete quantity of module 2 is not limited in every battery system, and is preferred, and three module 2 is constituteed respectively to whole electric core 1, and every module 2 is arranged into one row along transversely. Four exhaust passages 3 extending in the transverse direction, two exhaust passages 3 between two adjacent modules 2, and two exhaust passages 3 formed between two modules 2 located at the edge and the side surface of the upper case are formed in the battery system in total.

Be provided with explosion-proof valve 4 respectively with one side end department at whole exhaust passage 3, explosion-proof valve 4 sets up the left end at whole exhaust passage 3 or the right-hand member of whole exhaust passage 3 promptly, is convenient for set up sufficient discharge space beside the battery system, need not to set up discharge space in battery system's both sides, improves space utilization.

The explosion-proof valve 4 is over against the exhaust channel 3, so that the exhaust is smoother and more efficient, and the shell formed by the upper box body and the lower box body 5 is prevented from being cracked; constitute module 2 with a plurality of electric cores 1, improved space utilization, promote battery system's energy density.

In order to avoid the high-temperature and high-pressure gas generated during thermal runaway from flowing around in the battery system, it is preferable that all the exhaust passages 3 be designed to have a structure independent of each other. Once the thermal runaway of the battery cell 1 occurs, the generated high-temperature and high-pressure gas flows only in the exhaust channel 3 to which the battery cell 1 belongs, so that the risk of causing the thermal runaway of the battery cells 1 at other positions is reduced.

Preferably, the setting directions of the pressure relief valves of two adjacent battery cells 1 are opposite. That is, the relief valve of an electric core 1 sets up towards the right side, and then the relief valve of its adjacent electric core 1 all sets up towards the left side, avoids the relief valve of two electric cores 1 too close to and leads to the heat diffusion.

In addition to the above structure, the explosion-proof valve 4 is preferably a waterproof sealing explosion-proof valve. The specific specification of the explosion-proof valve 4 is selected according to parameters such as air pressure, flow rate and the like, and the integral thermal runaway protection capability of the battery system is favorably improved.

The specific model and specification of the battery cell 1 are not limited, and the battery cell is preferably a battery cell with two side pole outlets, so that the exhaust is smoother, and the heat diffusion risk is lower.

The specific installation mode of the explosion-proof valve 4 is not limited, and preferably, a plurality of explosion-proof valves 4 are arranged in series at least at one side end of each exhaust channel 3 to improve the safety. According to the requirement of the exhaust rate, the end of each exhaust channel 3 is preferably provided with one to four explosion-proof valves 4, so that high-temperature and high-pressure gas sprayed by the battery cell 1 during thermal runaway can be discharged in time, and the thermal runaway protector is particularly suitable for thermal runaway protection of a ternary battery cell.

On the basis of the above structure, the existing mechanical pressure relief valve can be applied to the battery system, and preferably, as shown in fig. 4, the explosion-proof valve 4 includes a disk-shaped valve main body 41, a mounting column 42 is arranged in the middle of the valve main body 41, and an external thread is arranged on the outer wall of the mounting column 42 for fixedly mounting the explosion-proof valve 4 on the battery system. A plurality of exhaust holes 43 for rapidly exhausting high-temperature and high-pressure gas are provided in the valve main body 41. A baffle plate (not shown) is normally shielded at the exhaust hole 43, and when the pressure of the gas in the exhaust channel 3 exceeds a certain value, the baffle plate is pushed open, so that the exhaust hole 43 realizes the exhaust function; when the pressure of the gas in the exhaust passage 3 is restored to the safety threshold, the baffle plate is reset.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides a battery system, includes a plurality of electric cores (1) that the relief valve transversely arranged, whole two at least modules (2) are constituteed in electric core (1), its characterized in that, adjacent two form between module (2) along transversely extending exhaust passage (3), every at least one side end of exhaust passage (3) is provided with explosion-proof valve (4).

2. The battery system according to claim 1, further comprising an upper case including a top cover and a side surface extending vertically downward along a side of the top cover, the explosion-proof valve (4) being mounted on the side surface of the upper case.

3. The battery system according to claim 2, further comprising a lower case (5), wherein the module (2) is fixed on the lower case (5), and the upper case and the lower case (5) are fastened to form an accommodating space for accommodating the module (2).

4. The battery system according to claim 3, wherein a module fixing portion for limiting the module (2) is formed on the lower case (5).

5. The battery system according to claim 2, wherein all the battery cells (1) are respectively formed into three modules (2), four transversely extending exhaust passages (3) are formed between two adjacent modules (2) and between the modules (2) at the edge and the side surface of the upper box, and the explosion-proof valves (4) are respectively arranged at the end heads of the same side of all the exhaust passages (3).

6. The battery system according to claim 5, wherein all the exhaust passages (3) are independent from each other.

7. The battery system according to any one of claims 1 to 6, wherein the pressure relief valves of two adjacent battery cells (1) are arranged in opposite directions.

8. The battery system according to any one of claims 1 to 6, wherein the explosion-proof valve (4) is a waterproof sealing explosion-proof valve.

9. The battery system according to any of claims 1 to 6, characterized in that the cell (1) is a two-sided post cell.

10. The battery system according to any one of claims 1 to 6, wherein a plurality of the explosion-proof valves (4) are provided in series at least one side end of each of the exhaust passages (3).