CN213340635U

CN213340635U - Battery cell module and battery pack

Info

Publication number: CN213340635U
Application number: CN202022055095.0U
Authority: CN
Inventors: 刘攀; 赵紫辉; 黄明高; 唐泳聪; 徐尚伟; 邓雪峰; 张春秀; 付望
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-06-01
Anticipated expiration: 2030-09-18

Abstract

The utility model relates to the technical field of batteries, a electricity core module and battery package is disclosed. The battery cell module comprises a shell, a cover plate, a battery cell group and a partition plate. The cover plate covers the upper end of the shell. The electric core group includes the end plate and the electric core body that constitutes by a plurality of electric cores that set up side by side, and the end plate is all installed at the both ends of electric core body. The shell, the cover plate and the two end plates jointly enclose a containing cavity which is formed for containing the battery cell body. The baffle sets up between two adjacent electric cores to will hold the chamber and separate and form two at least pressure release rooms, the pressure release room has the blind hole, and the blind hole is configured to can be broken through by the gas that the electric core of taking place thermal runaway produced. The battery pack comprises the battery cell module. The blind hole can be broken by the gas that takes place the electric core production of thermal runaway, and the gaseous quick discharge in the electric core module of being convenient for. The battery cell module is simple in structure and high in safety.

Description

Battery cell module and battery pack

Technical Field

The utility model relates to a battery technology field especially relates to an electricity core module and battery package.

Background

The battery cell module comprises a box body and a battery cell group positioned in the box body, wherein the battery cell group consists of a plurality of monomer battery cells. The monomer electricity core takes place thermal runaway easily under the circumstances such as short circuit, overcharge, can produce a certain amount of high temperature, high-pressure gas, if can not in time discharge, can lead to the incident such as electric core module emergence explosion.

The conventional battery cell module is provided with the pressure release valve on a single battery cell generally, so that the design difficulty and the production process of the battery cell are increased, and the cost of the battery module is increased. On the other hand, all need dodge the space for the installation of relief valve in electric core module and the battery package, influenced arranging of other structures of electric core module and arranging of electric core module in the battery package, increased the volume and the structural complexity of electric core module.

Therefore, a battery cell module and a battery pack are needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electricity core module to it is complicated to solve current electric core module structure, the lower problem of security.

To achieve the purpose, the technical proposal adopted by the utility model is that:

a cell module, comprising:

the cover plate covers the upper end of the shell;

the battery cell group comprises an end plate and a battery cell body consisting of a plurality of battery cells arranged side by side, and the end plate is arranged at each of two ends of the battery cell body; the shell, the cover plate and the two end plates jointly enclose a containing cavity for containing the battery cell body;

the separator is arranged between two adjacent battery cells and divides the accommodating cavity into at least two pressure relief chambers, and each pressure relief chamber is provided with a blind hole which is configured to be broken by gas generated by the battery cell in thermal runaway.

Preferably, the partition plate is clamped between any two adjacent battery cells, and each pressure relief chamber contains one battery cell.

Preferably, the battery cell module further comprises two insulation plates, the two insulation plates are respectively arranged on the inner sides of two first side walls opposite to each other on the shell, the insulation plates are provided with the blind holes, and the first side walls are provided with air holes opposite to the blind holes; the punched blind holes are communicated with the corresponding air holes to form an exhaust passage of the pressure relief chamber.

Preferably, the two insulating plates have at least two blind holes in the portion of each pressure relief chamber.

Preferably, the outer side of the first side wall of the housing is provided with a limiting groove, and two opposite ends of the cover plate are respectively provided with a limiting part which can be inserted into the limiting groove in an extending manner.

Preferably, the outer side of the first side wall of the casing is provided with a mounting plate for mounting the battery cell module.

Preferably, the mounting plate is provided with a mounting hole.

Preferably, the separator is an aerogel sheet.

Preferably, the insulating plate is a polycarbonate plate.

Another object of the utility model is to provide a battery pack to it is complicated to solve current battery pack structure, and the great and high problem of manufacturing cost of volume.

a battery pack comprises the battery cell module.

The utility model has the advantages that:

the utility model discloses an electricity core module will hold the chamber that holds of electric core body through the baffle between the adjacent electric core and separate and form a plurality of pressure-relief rooms. The blind hole in the pressure relief chamber forms a weak area of the pressure relief chamber. When the indoor electric core of pressure release takes place thermal runaway, the blind hole can be broken through and quick discharge to the gas of its production, has realized the thermal runaway protection of module level. For set up the relief valve on electric core, the utility model discloses an electric core module simple structure, rationally distributed does not occupy the envelope space of electric core module. The thermal runaway protection process is simple, safe and reliable, and the production cost of the battery cell module is reduced.

The utility model discloses a battery package includes above-mentioned electricity core module. The battery pack realizes module-level thermal runaway protection. Simple structure, rationally distributed has reduced the volume of battery package. And the thermal runaway protection process is simple, safe and reliable, and the production cost of the battery pack is reduced.

Drawings

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

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

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic structural diagram of a housing according to an embodiment of the present invention.

The component names and designations in the drawings are as follows:

1. a housing; 11. a first side wall; 111. air holes; 112. a limiting groove; 12. mounting a plate; 121. mounting holes; 2. a cover plate; 21. a limiting part; 3. an electric core; 4. a partition plate; 5. an end plate; 6. an insulating plate; 61. and (4) blind holes.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements related to the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. 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 present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

As shown in fig. 1 to fig. 3, the present embodiment discloses a battery cell module. This electricity core module includes casing 1, apron 2, electric core group and baffle 4. The cover plate 2 covers the upper end of the shell 1. The electric core group includes end plate 5 and the electric core body that constitutes by a plurality of electric cores 3 that set up side by side, and end plate 5 is all installed at the both ends of electric core body. The shell 1, the cover plate 2 and the two end plates 5 jointly enclose a containing cavity which is formed for containing the battery cell body. The partition plate 4 is arranged between two adjacent electric cores 3 and divides the accommodating cavity into at least two pressure relief chambers. The pressure relief chamber has a blind hole 61, and the blind hole 61 is configured to be capable of being broken by gas generated by the battery cell 3 in which thermal runaway occurs.

In this embodiment, the cell module separates the accommodating cavity accommodating the cell body through the partition plate 4 between the adjacent cells 3 to form a plurality of pressure relief chambers. A blind hole 61 in the pressure relief chamber forms a weak area of the pressure relief chamber. When the indoor electric core 3 of pressure release takes place thermal runaway, the blind hole 61 can be broken through to the gas of its production, has realized the thermal runaway protection of module level. For set up the relief valve on electric core, the electric core module simple structure of this embodiment, rationally distributed does not occupy the envelope space of electric core module. The thermal runaway protection process is simple, safe and reliable, and the production cost of the battery cell module is reduced. Preferably, a partition plate 4 is clamped between any two adjacent battery cells 3, and each pressure relief chamber accommodates one battery cell 3. Separate every electric core 3 alone through the pressure relief room, influence other electric core 3's safety when having avoided single electric core 3 to take place thermal runaway, improved the reliability of electric core module.

Preferably, the battery cell module further includes two insulating plates 6, the number of the insulating plates 6 is two, the two insulating plates 6 are respectively disposed on the inner sides of the two first side walls 11 opposite to each other on the casing 1, the insulating plates 6 are provided with blind holes 61, and the first side walls 11 are provided with air holes 111 opposite to the blind holes 61. The punched blind holes 61 are communicated with the corresponding air holes 111 to form an exhaust passage of the pressure relief chamber.

The thickness of the insulating plate 6 and the opening depth of the blind hole 61 need to be determined according to the volume and pressure generated when the thermal runaway of the single battery cell 3 actually occurs, and are not particularly limited herein.

As shown in fig. 2 and 4, the housing 1 is a "U" shaped shell having two oppositely disposed first side walls 11. When the electric core group is installed in the casing 1, the end plates 5 at the two ends of the electric core body can be used as the second side wall of the casing 1 and are connected with the first side wall 11 to form a containing cavity with an open top, and the cover plate 2 covers the upper end of the casing 1 and is used for sealing the opening of the containing cavity so as to form a closed cavity body in the containing cavity.

As shown in fig. 2 and 3, the first side wall 11 of the housing 1 has a limiting groove 112 on the outer side, and two opposite ends of the cover plate 2 are extended with limiting portions 21 capable of being inserted into the limiting groove 112. When the position-limiting portion 21 of the cover plate 2 is inserted into the corresponding position-limiting groove 112, the outer surface of the position-limiting portion 21 is flush with the outer surface of the first sidewall 11, so as to enhance the appearance.

Preferably, the separator 4 is an aerogel plate. The aerogel plate has the characteristics of good fire resistance, flame retardance, softness and impact resistance, and is cheap and easy to obtain. Set up aerogel board between two adjacent electric cores 3, improved the security performance and the shock attenuation ability of shocking resistance of electric core module. The partition plate 4 separates the accommodating cavity to form a plurality of pressure relief chambers, each pressure relief chamber correspondingly accommodates one battery cell 3, the safety of other battery cells 3 is prevented from being influenced when the single battery cell 3 is out of thermal runaway, and good isolation protection is realized.

Preferably, the insulating plate 6 is a polycarbonate plate. This polycarbonate board has good insulating properties, has realized electric core 3 and casing 1's insulation. Of course, the insulating plate 6 may be made of other materials having insulating properties.

The air hole 111 in this embodiment is disposed opposite to the blind hole 61, and when the blind hole 61 is broken by high-temperature and high-pressure gas generated by the battery cell 3, a part of debris may be generated. To avoid debris from clogging the exhaust passage formed by the communication between the air holes 111 and the blind hole 61. Preferably, the radial cross-sectional area of the gas hole 111 is equal to or greater than the radial cross-sectional area of the blind hole 61, facilitating rapid gas discharge from the pressure relief chamber.

Further preferably, the radial cross-sectional shapes of the air hole 111 and the blind hole 61 are the same, so that the processing and the manufacturing of the air hole 111 and the blind hole 61 are facilitated. In this embodiment, the radial cross-sectional shapes of the air hole 111 and the blind hole 61 are square. Of course, the radial cross-sectional shapes of the two can also be round, kidney-shaped or other polygons. The specific dimensions of the air hole 111 and the blind hole 61 are determined according to actual requirements, and are not limited herein.

Preferably, the portion of the two insulating plates 6 located in each pressure relief chamber has at least two blind holes 61, so that the two ends of each pressure relief chamber, where the insulating plates 6 are mounted, can form at least two exhaust channels. The plurality of exhaust passages facilitate timely and efficient exhaust of gas. Moreover, the number of the weak areas of the pressure relief chamber is increased by the plurality of blind holes 61, so that the problem that gas cannot break through the single blind hole 61 and cannot be discharged in time to cause safety accidents is avoided.

As shown in fig. 3 and 4, a mounting plate 12 for mounting the cell module is disposed on the outer side of the first side wall 11 of the housing 1. The mounting plate 12 is horizontally disposed and extends to both ends of the first sidewall 11 along the length direction of the first sidewall 11.

Further preferably, the mounting plate 12 is provided with a mounting hole 121. Through retaining members such as bolts, etc. wear to locate in mounting hole 121 to install mounting panel 12 in appointed mounted position, thereby realize the firm installation of electric core module.

The number of the mounting holes 121 is multiple in this embodiment, and the multiple mounting holes 121 are arranged at equal intervals along the length direction of the mounting plate 12, so that the mounting plate 12 is stressed uniformly, and the fastening effect of the mounting plate 12 is improved.

The present embodiment also discloses a battery pack (not shown). This battery package includes foretell electricity core module. The battery pack realizes module-level thermal runaway protection, has a simple structure and reasonable layout, and reduces the volume of the battery pack. And the thermal runaway protection process is simple, safe and reliable, and the production cost of the battery pack is reduced. Meanwhile, one battery cell 3 is installed in each pressure relief chamber, so that the influence on other battery cells 3 when the single battery cell 3 is out of control due to heat is avoided, and the safety of the battery pack is improved.

The above embodiments have been described only the basic principles and features of the present invention, and the present invention is not limited by the above embodiments, and is not departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a battery cell module which characterized in that includes:

the device comprises a shell (1) and a cover plate (2), wherein the cover plate (2) covers the upper end of the shell (1);

the battery cell group comprises an end plate (5) and a battery cell body consisting of a plurality of battery cells (3) arranged side by side, and the end plates (5) are arranged at two ends of the battery cell body; the shell (1), the cover plate (2) and the two end plates (5) are jointly surrounded to form an accommodating cavity for accommodating the battery cell body;

the separator (4) is arranged between two adjacent battery cores (3) and divides the accommodating cavity into at least two pressure relief chambers, each pressure relief chamber is provided with a blind hole (61), and the blind holes (61) are configured to be broken by gas generated by the battery cores (3) in thermal runaway.

2. The battery cell module of claim 1, wherein the separator (4) is sandwiched between any two adjacent battery cells (3), and each pressure relief chamber accommodates one battery cell (3).

3. The cell module according to claim 1, further comprising two insulating plates (6), wherein the two insulating plates (6) are respectively disposed on the inner sides of two first side walls (11) opposite to each other on the casing (1), the insulating plates (6) are provided with the blind holes (61), and the first side walls (11) are provided with air holes (111) opposite to the blind holes (61); the punched blind holes (61) are communicated with the corresponding air holes (111) to form an exhaust passage of the pressure relief chamber.

4. The cell module according to claim 3, wherein the two insulating plates (6) have at least two blind holes (61) in the part of each pressure relief chamber.

5. The battery cell module of claim 1, wherein a limiting groove (112) is formed in an outer side of the first side wall (11) of the casing (1), and two opposite ends of the cover plate (2) extend to form limiting portions (21) which can be inserted into the limiting groove (112).

6. The cell module of claim 1, wherein a mounting plate (12) for mounting the cell module is arranged on the outer side of the first side wall (11) of the housing (1).

7. The battery cell module of claim 6, wherein the mounting plate (12) is provided with a mounting hole (121).

8. The cell module of claim 1, wherein the separator (4) is an aerogel plate.

9. The cell module of claim 3, wherein the insulating plate (6) is a polycarbonate plate.

10. A battery pack, comprising the cell module of any one of claims 1-9.