CN218788462U - Battery module and battery pack - Google Patents

Abstract

The utility model belongs to the technical field of the battery, a battery module and battery package are disclosed. The battery module comprises a module shell, a plurality of battery cells, a heat insulation pad and a top cover plate, wherein the battery cells are stacked in the module shell along a preset direction; the heat insulation pads are clamped between two adjacent electric cores and between the side wall surfaces of the electric cores and the inner side wall surface of the module shell; the top cover plate is installed at the top of the module shell, a plurality of exhaust ports are formed in the top cover plate, two adjacent heat insulation pads and the top cover plate form a closed exhaust passage, and the exhaust passage is at least communicated with one exhaust port correspondingly. This battery module makes each electric core can both have an independent exhaust passage and gas vent, and when one of them electric core took place the thermal runaway, the high temperature high pressure flue gas of production followed independent exhaust passage and the directional discharge of gas vent, can not influence adjacent electric core, has restrained electric core thermal runaway's diffusion, has improved battery module's safety in utilization.

Description

Battery module and battery pack

Technical Field

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

Background

VDA (Verband der Automobilindrieie, germany automobile industry Association) standard module among the prior art, inside module casing was put into in its electric core piles up, did not have thermal-insulated design and exhaust structure between each electric core, when leading to an electric core to appear thermal runaway, can diffuse rapidly to other electric cores inside the module on. And the big module battery of soft package of another kind of structure, its module design can't guarantee that the electric core of not out of control does not receive the high-temperature gas influence of the electric core of out of control to electric core series-parallel connection is in a great deal, can't guarantee that battery thermal runaway only takes place in electric core unit as little as possible, and the high-temperature gas after the thermal runaway can take place to flow back, makes single electric core diffuse whole module rapidly after out of control, thereby arouses other electric cores out of control.

This results in the following disadvantages of the battery module in the related art: the battery module is not provided with a directional exhaust design, so that the use safety is poor; when assembling the battery module in the battery package, need set up multiple protection facility on the battery module to need consider the high pressure protection design in the battery package, improved manufacturing cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery module can prevent the propagation of thermal runaway when electric core takes place the thermal runaway directional discharge high temperature high pressure flue gas, improves the safety in utilization.

To achieve the purpose, the utility model adopts the following technical proposal:

the battery module comprises a module shell, a plurality of battery cells, a heat insulation pad and a top cover plate, wherein the battery cells are stacked in the module shell along a preset direction; the heat insulation pads are clamped between two adjacent electric cores and between the side wall surfaces of the electric cores and the inner side wall surface of the module shell; the top cover plate is arranged on the top of the module shell, a plurality of exhaust ports are formed in the top cover plate, a closed exhaust channel is formed between every two adjacent heat insulation pads and the top cover plate and between the adjacent two adjacent heat insulation pads and the module shell, and the exhaust channel is correspondingly communicated with at least one exhaust port.

Optionally, the plurality of air outlets and the plurality of air exhaust channels are in one-to-one communication, and the air outlets extend in a first direction perpendicular to the stacking direction of the battery cells.

Alternatively, the exhaust port is provided at a central position of the exhaust passage.

Optionally, the heat insulation pad extends upward out of the battery cell and is connected with the top cover plate in a sealing manner.

Optionally, the heat insulation pad is an elastic member.

Optionally, the heat insulation pad and the protection pad are both made of aerogel heat insulation pieces.

Optionally, the exhaust port is in at least one of a polygonal shape, a circular shape or an elliptical shape.

Optionally, the module housing includes an end plate, and the end plate is provided with a mounting hole for extending the plurality of battery module output electrodes.

Optionally, a sealing element is further disposed between the top cover plate and the heat insulation pad, the sealing element is a protection gasket, and the protection gasket is provided with a heat diffusion opening corresponding to the exhaust opening.

Another object of the present invention is to provide a battery pack, which includes the battery module according to any of the above-mentioned aspects.

Has the advantages that:

the utility model provides a battery module holds a plurality of electric cores of piling up the placing through the module shell, the lamina tecti is installed in the top of module shell, press from both sides between two adjacent electric cores and establish the heat insulating mattress simultaneously, play and separate the effect that electric core prevented heat propagation, and this heat insulating mattress upwards extends to and can form an inclosed exhaust passage with the lamina tecti, the exhaust passage corresponds the intercommunication setting with the gas vent on the lamina tecti, make each electric core can both have an independent exhaust passage and gas vent, when one of them electric core takes place the thermal runaway, the high temperature high pressure flue gas that produces is followed independent exhaust passage and the directional discharge of gas vent, can not influence adjacent electric core, electric core thermal runaway's diffusion has been suppressed, the safety in utilization of battery module has been improved.

Drawings

Fig. 1 is a schematic view illustrating a battery module according to an embodiment of the present invention when a top cover plate is exploded;

fig. 2 is a schematic cross-sectional view of a battery module according to an embodiment of the present invention;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

In the figure:

100. a module housing; 110. an end plate; 111. mounting holes; 200. an electric core; 210. a heat insulating pad; 300. a top cover plate; 310. and (7) an exhaust port.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. 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 of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific 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.

Referring to fig. 1 and 2, in the present embodiment, the battery module includes a module housing 100, a plurality of battery cells 200, a heat insulation pad 210 and a top cover plate 300, wherein the plurality of battery cells 200 are stacked in a predetermined direction in the module housing 100; the heat insulation pad 210 is sandwiched between two adjacent battery cells 200, and between a side wall surface of the battery cell 200 and an inner side wall surface of the module case 100; the top cover 300 is installed on the top of the module case 100, the top cover 300 is provided with a plurality of exhaust ports 310, and a closed exhaust passage is formed between two adjacent heat insulating mats 210 and the top cover 300 as well as the module case 300, and the exhaust passage is correspondingly communicated with at least one exhaust port 310.

The battery module in this embodiment holds a plurality of electric cores 200 of piling up the placing through module shell 100, the top deck 300 is installed in the top of module shell 100, press from both sides simultaneously and establish heat insulating mattress 210 between two adjacent electric cores 200, play and separate electric core 200 and prevent the effect of heat propagation, and this heat insulating mattress 210 upwards extends to and can form a inclosed exhaust passage with top deck 300, exhaust passage corresponds the intercommunication setting with the gas vent 310 on the top deck 300, make each electric core 200 can both have an independent exhaust passage and gas vent 310, when one of them electric core 200 takes place the thermal runaway, the directional discharge of high temperature high pressure flue gas from independent exhaust passage and gas vent 310 of production, can not influence adjacent electric core 200, the diffusion of electric core 200 thermal runaway has been inhibited, the safety in utilization of battery module has been improved.

Specifically, the module case 100 includes an end plate 110, and the end plate 110 is formed with a mounting hole 111 through which the plurality of battery module output electrodes extend. The module housing 100 in this embodiment is a rectangular parallelepiped, two mounting holes 111 are formed in an end plate 110 at two ends of the module housing 100, and a positive output stage and a negative output stage formed by converging a plurality of battery cells 200 extend out of the mounting holes 111 respectively.

As shown in fig. 3, the plurality of air outlets 310 are in one-to-one correspondence with the plurality of air outlet channels, and the air outlets 310 extend in a first direction perpendicular to the stacking direction of the battery cells 200. As shown in fig. 1, each exhaust passage is correspondingly provided with an exhaust port 310, and the exhaust port 310 extends along a first direction perpendicular to the stacking direction of the battery cells 200, i.e., along the length direction of the battery module, so that the opening area of the exhaust port 310 is as large as possible, thereby smoothly discharging high-temperature flue gas generated by the thermal runaway battery cells 200 and preventing heat accumulation.

With continued reference to fig. 1, the exhaust port 310 is disposed at a central position of the exhaust passage. The gas vent 310 that sets up like this can make the produced high temperature flue gas of thermal runaway electricity core 200 concentrate as far as possible from electricity core 200 length direction's intermediate position blowout, avoids causing the damage to the utmost point ear at electricity core 200 length direction both ends from the position blowout that is close to utmost point ear, avoids causing the influence to other structures in the battery package including this battery module, delays the dead time of battery module.

Further, the exhaust port 310 may have at least one of a polygonal shape, a circular shape, and an oval shape. In this embodiment, the air outlet 310 is rectangular, so that the area of the air outlet 310 can be increased as much as possible, and the high-temperature flue gas of the thermal runaway battery cell 200 can be discharged conveniently.

In other alternative embodiments, the thermal insulation pad 210 extends upward from the battery cell 200 and is hermetically connected to the top cover plate 300. Specifically, a sealing member is further disposed between the top cover plate 300 and the heat insulation pad 210. The sealing member can further ensure the sealing connection between the heat insulating pad 210 and the top cover plate 300, prevent the flue gas from invading into another exhaust passage from the gap between the top cover plate 300 and the heat insulating pad 210, further inhibit the diffusion of high-temperature flue gas, and ensure the use safety of the battery module.

Further, the sealing member is a protection gasket disposed between the top cover plate 300 and the plurality of heat insulation pads 210, and the protection gasket is opened with a heat diffusion port corresponding to the exhaust port 310. The protection gasket is a complete gasket, has seted up the heat diffusion mouth on the protection gasket to set up in the below of lamina tecti 300, the protection gasket can reduce the preparation degree of difficulty of sealing member, need not to use a plurality of sealing members to set up between a plurality of heat insulating mattress 210 and lamina tecti 300, reduction in production cost.

Preferably, the heat insulation pad 210 and the protection pad are elastic members. The elastic component can prevent damage to the side wall surface of the battery cell 200 and can also play a role in buffering, so that the battery cell 200 is protected, and the use safety of the battery module is further guaranteed.

Alternatively, the heat insulation pad 210 and the protection pad are made of aerogel heat insulation members. The aerogel heat insulation part is an aerogel composite heat insulation material obtained by compounding silica aerogel and a ceramic fiber base material, and is used for preventing heat transfer between a heating part and an equipment shell; the aerogel heat insulation part has the characteristics of flame retardance and no powder falling when the heat conductivity coefficient at room temperature is less than 0.035W/m.K, and can effectively isolate the heat from diffusing to the peripheral battery cells 200 when the battery cells 200 are subjected to thermal runaway when being applied to the heat insulation pad 210 between the battery cells 200, so that the peripheral battery cells 200 can be protected from normal operation, and meanwhile, the aerogel heat insulation part also has the effects of insulation and buffering.

The embodiment also provides a battery pack, which comprises the battery module according to any one of the above aspects. Use the battery package of above-mentioned battery module, such as electric automobile, electric bicycle, can prevent that the high temperature flue gas from diffusing to electric core 200 on every side when one of them electric core 200 of battery module appears thermal runaway, prevent that the battery module from appearing the thermal diffusion, guaranteed the security and the reliability of battery module and the battery package that uses this battery module.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Battery module, its characterized in that includes:

a module housing;

the battery cells are stacked and arranged in the module shell along a preset direction;

the heat insulation pads are clamped between two adjacent electric cores and between the side wall surfaces of the electric cores and the inner side wall surface of the module shell;

the top cover plate is installed on the top of the module shell, a plurality of exhaust ports are formed in the top cover plate, two adjacent heat insulation pads are communicated with the top cover plate and the module shell to form a closed exhaust passage, and the exhaust passage is communicated with at least one exhaust port correspondingly.

2. The battery module according to claim 1, wherein a plurality of the air vents are provided in one-to-one correspondence with a plurality of the air vent channels, and the air vents extend in a first direction perpendicular to the stacking direction of the battery cells.

3. The battery module according to claim 2, wherein the exhaust port is provided at a central position of the exhaust passage.

4. The battery module according to claim 1, wherein the heat insulation pad extends upwards out of the battery core and is connected with the top cover plate in a sealing mode.

5. The battery module according to claim 1, wherein the heat insulating mat is an elastic member.

6. The battery module according to claim 5, wherein the insulation mat is made of aerogel insulation.

7. The battery module according to any one of claims 1 to 6, wherein the air outlet has at least one of a polygonal shape, a circular shape, or an oval shape.

8. The battery module according to any one of claims 1 to 6, wherein the module case comprises an end plate having a mounting hole through which the plurality of battery module output electrodes protrude.

9. The battery module as claimed in claim 4, wherein a sealing member is further disposed between the top cover plate and the heat insulating pad, the sealing member is a protective gasket, and the protective gasket is provided with a heat diffusion opening corresponding to the air outlet.

10. A battery pack comprising the battery module according to any one of claims 1 to 9.

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